JP7268664B2 - Position detector - Google Patents

Description

The present invention relates to a position detection device.

Conventionally, a transmission having a plurality of gear pairs between a main shaft and a counter shaft and a twin clutch arranged on the main shaft are provided. There is a transmission that connects and disconnects (see, for example, Patent Document 1).

The main shaft is composed of an inner main shaft and an outer main shaft that rotatably supports the inner main shaft. The twin clutch is composed of a first clutch that connects and disconnects the rotational driving force transmitted to the inner main shaft, and a second clutch that connects and disconnects the rotational driving force transmitted to the outer main shaft. The transmission is configured to transmit rotational driving force between adjacent transmission gears on each shaft by a dog clutch having dog teeth and dog holes.

The transmission includes a gear position sensor that detects the number of shift stages of the transmission, an inner main shaft rotation speed sensor that detects the rotation speed of the inner main shaft, an outer main shaft rotation speed sensor that detects the rotation speed of the outer main shaft, and a transmission. and a control unit that controls the speed change. The control unit detects the engaged state of the dog clutch based on the rotational speed difference between the inner main shaft and the outer main shaft and information on the number of gears.

For example, when disengaging the dog clutch, it is determined that the disengagement has been normally completed, or that the dog tip is caught in the dog hole where the dog tooth cannot be pulled out. On the other hand, when engaging the dog clutch, it is determined that the engagement has been completed normally, or that the dog teeth are in a state of front contact where the dog teeth do not enter the dog holes.

Patent No. 4895996

The inventors of the present invention have studied how to properly engage the dog clutch with reference to the transmission disclosed in Patent Document 1 above.

In general, a dog clutch includes a first clutch component configured to be rotatable about an axis, and a first clutch component arranged on the other side in the axial direction of the first clutch component and configured to be rotatable about the axis. and a second clutch component.

In the first clutch forming portion, first dog teeth projecting toward the other side in the axial direction and first dog holes recessed toward the one side in the axial direction are alternately arranged in a circumferential direction around the axis. In the second clutch forming portion, second dog teeth protruding on one side in the axial direction and second dog holes recessed on the other side in the axial direction are alternately arranged in the circumferential direction about the axis.

Here, when engaging the dog clutch, in a state in which the drive source rotates the first clutch constituent portion about the axis, the actuator is controlled to move the first clutch constituent portion toward the second clutch constituent portion. part is required.

Here, in order to normally complete the meshing, the control unit determines that the first dog tooth faces the second dog hole and the second dog tooth faces the first dog hole, The first clutch component is driven to move toward the second clutch component.

Therefore, in order to determine whether or not the first dog tooth faces the second dog hole and the second dog tooth faces the first dog hole, the first clutch configuration It is necessary to detect the positional relationship between the part and the second clutch forming part.

In other words, in order to normally complete the engagement of the dog clutch, the positional relationship between the first dog tooth and the first dog hole in the first clutch component and the second dog tooth and the second dog hole in the second clutch component must be adjusted. A position detection device for detection is required.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a position detection device that detects the positional relationship between a first clutch component and a second clutch component in the direction of rotation.

In order to achieve the above object, according to the first aspect of the present invention, there is provided a position detecting device which is configured to be rotatable about an axis extending in the axial direction when a predetermined direction is defined as the axial direction, and is recessed on one side in the axial direction. a first clutch forming portion (12) in which first hole portions (12b) and first tooth portions (12a) protruding toward the other side in the axial direction are alternately arranged in a circumferential direction about the axis; The second hole portion (11b) is arranged on the other side in the axial direction with respect to the one clutch forming portion and is configured to be rotatable about the axis, and has a second hole portion (11b) that is recessed on the other side in the axial direction and a second hole portion (11b) that is convex on the one side in the axial direction. A dog clutch (10) comprising tooth portions (11a) and second clutch forming portions (11) arranged alternately in a circumferential direction about an axis,
While the drive source (30) rotates the first clutch component about the axis, the actuator (40) moves one of the first clutch component and the second clutch component to the other side to rotate the first clutch component. A power transmission system ( 1) A position detection device applied to
A magnetic field having a first magnetic pole portion (62) and a second magnetic pole portion (61) that are arranged radially outward about the axis with respect to the first clutch formation portion and the second clutch formation portion and form mutually different polarities. generators (60, 60A, 60B, 75);
It has a first end surface (72c, 74a) arranged radially outward about the axis with respect to the first tooth portion or the first hole portion, and a magnetic flux is generated between the first end surface and the first magnetic pole portion. and second end faces (71c, 73a) arranged radially outward about the axis with respect to the second tooth or the second hole. and a second magnetic flux path portion (71, 73) for allowing magnetic flux to pass between the second magnetic pole portion and the second end face; is disposed radially outward about the axis and provided between the first magnetic flux path portion and the second magnetic flux path portion, and the direction of the magnetic flux passing between the first magnetic flux path portion and the second magnetic flux path portion A magnetic detection element (80) that outputs a sensor signal indicating
The magnetic detection element is rotated about the axis depending on the positional relationship between the first hole and first tooth of the first clutch component and the second hole and second tooth of the second clutch component. A signal indicating the positional relationship is output as a sensor signal by changing the direction of the magnetic flux.

Therefore, it is possible to provide a position detection device that detects the positional relationship between the first clutch component and the second clutch component in the rotational direction.

According to the fifth aspect of the present invention, in the position detecting device, the first hole portion (12b) is configured to be rotatable about an axis extending in the axial direction when the predetermined direction is the axial direction, and the first hole portion (12b) is recessed on one side in the axial direction. and a first tooth portion (12a) protruding on the other side in the axial direction are alternately arranged in the circumferential direction around the axis, and with respect to the first clutch constituting portion A second hole (11b) which is arranged on the other side in the axial direction and is configured to be rotatable about the axis and is recessed on the other side in the axial direction and a second tooth portion (11a) which protrudes on the one side in the axial direction. A dog clutch (10) comprising second clutch forming portions (11) arranged alternately in a circumferential direction about an axis,
While the drive source (30) rotates the first clutch component about the axis, the actuator (40) moves one of the first clutch component and the second clutch component to the other side to rotate the first clutch component. A power transmission system ( 1) A position detection device applied to
A first magnetic pole portion (61, 62) and a second magnetic pole portion (61, 62) which are arranged radially outward about the axis with respect to the first clutch constituent portion and the second clutch constituent portion and form the same polarity as each other. 62) with magnetic field generators (60A, 60B, 75);
It has a first end face (74a) arranged radially outward about the axis with respect to the first tooth portion or the first hole portion, and allows magnetic flux to pass between the first end face and the first magnetic pole portion. a first magnetic flux path portion (74); a yoke (70) comprising a second magnetic flux path portion (73) for passing magnetic flux between the two magnetic pole portions;
disposed radially outward of the first clutch constituent portion and the second clutch constituent portion about the axis and provided between the first magnetic flux path portion and the second magnetic flux pathway portion; Magnetic detection for outputting a sensor signal indicating the direction of combined magnetic flux obtained by synthesizing the first magnetic flux passing between the first magnetic flux path and the second magnetic flux passing between the second clutch forming part and the second magnetic flux path. an element (80),
The magnetic detection element is rotated about the axis depending on the positional relationship between the first hole and first tooth of the first clutch component and the second hole and second tooth of the second clutch component. A signal indicating the positional relationship is output as a sensor signal by changing the direction of the synthesized magnetic flux.

Therefore, it is possible to provide a position detection device that detects the positional relationship between the first clutch component and the second clutch component in the rotational direction.

According to the thirteenth aspect of the present invention, in the position detecting device, the first hole (12b) is configured to be rotatable about the axis extending in the axial direction when the predetermined direction is the axial direction, and the first hole (12b) is recessed on one side in the axial direction. and a first tooth portion (12a) protruding on the other side in the axial direction are alternately arranged in the circumferential direction around the axis, and with respect to the first clutch constituting portion It is arranged on the other side in the axial direction via a clearance (13) and configured to be rotatable about the axis, and has a second hole (11b) that is recessed on the other side in the axial direction and a second hole that is convex on the one side in the axial direction. A dog clutch (10) comprising tooth portions (11a) and second clutch forming portions (11) arranged alternately in a circumferential direction about an axis,
While the drive source (30) rotates the first clutch component about the axis, the actuator (40) moves one of the first clutch component and the second clutch component to the other side to rotate the first clutch component. A power transmission system ( 1) A position detection device applied to
A first magnetic pole forming portion (73) forming a first end face (73a) forming a magnetic pole and disposed radially outward of the clearance centered on the axis, and a diameter centered on the axis with respect to the clearance. a second magnetic pole forming portion (74) that is arranged on the outer side of the direction and that is displaced from the first magnetic pole forming portion in the circumferential direction about the axis and forms a second end face (74a) that forms a magnetic pole; a magnetic field generator (70) comprising
is disposed radially outward about the axis with respect to the first clutch component and the second clutch component, is provided between the first magnetic flux path portion and the second magnetic flux path portion, and is generated by the magnetic field generating portion a magnetic detection element (80) that outputs a sensor signal indicating the direction of the magnetic flux,
The magnetic detection element is rotated about the axis depending on the positional relationship between the first hole and first tooth of the first clutch component and the second hole and second tooth of the second clutch component. By changing the amplitude of the sensor signal, a signal indicating the positional relationship is output as the sensor signal.

Therefore, it is possible to provide a position detection device that detects the positional relationship between the first clutch component and the second clutch component in the rotational direction.

According to the eighteenth aspect of the present invention, in the position detecting device, the first hole (12b) is configured to be rotatable about an axis extending in the axial direction when the predetermined direction is the axial direction, and the first hole (12b) is recessed on one side in the axial direction. and a first tooth portion (12a) protruding on the other side in the axial direction are alternately arranged in the circumferential direction around the axis, and with respect to the first clutch constituting portion A second hole (11b) which is arranged on the other side in the axial direction and is configured to be rotatable about the axis and is recessed on the other side in the axial direction and a second tooth portion (11a) which protrudes on the one side in the axial direction. a dog clutch (10) comprising second clutch forming portions (11) arranged alternately in a circumferential direction about the axis,
While the drive source (30) rotates the first clutch component about the axis, the actuator (40) moves one of the first clutch component and the second clutch component to the other side to rotate the first clutch component. A power transmission system ( 1) A position detection device applied to
A first magnetic pole forming portion (73) arranged radially outward about the axis with respect to the first tooth portion or the first hole portion and forming a first end face (73a) forming a magnetic pole, and a second tooth or a second magnetic pole forming portion (74) disposed radially outward about the axis with respect to the second hole and forming a second end face (74a) forming a magnetic pole. )and,
It is arranged radially outward about the axis with respect to the first clutch constituent portion and the second clutch constituent portion, is arranged between the first magnetic pole forming portion and the second magnetic pole forming portion, and is generated by the magnetic field generating portion. A magnetic detection element (80) that outputs a sensor signal indicating the direction of the magnetic flux applied,
The magnetic detection element is rotated about the axis depending on the positional relationship between the first hole and first tooth of the first clutch component and the second hole and second tooth of the second clutch component. By changing the amplitude of the sensor signal, a signal indicating the positional relationship is output as the sensor signal.

Therefore, it is possible to provide a position detection device that detects the positional relationship between the first clutch component and the second clutch component in the rotational direction.

It should be noted that the reference numerals in parentheses of each means described in this column and claims indicate the correspondence with specific means described in the embodiments described later.

FIG. 2 is an external view of the overall configuration of the power transmission system according to the first embodiment as seen from the outside in the radial direction centering on the axis, and shows a state in which two clutch components of the dog clutch are separated. A plurality of teeth and a plurality of holes of one of the two clutch-constituting portions arranged on one side in the axial direction of the dog clutch of FIG. 1 in the first embodiment are viewed from the other side in the axial direction. It is a diagram. FIG. 2 is a view of a plurality of teeth and a plurality of holes of a clutch constituting portion other than one of the two clutch constituting portions of the dog clutch of FIG. 1 according to the first embodiment, viewed from one side in the axial direction; . 2 is an enlarged view of the position detection device of FIG. 1 in the first embodiment; FIG. FIG. 2 is a diagram showing a state in which hole portions of two clutch forming portions of a dog clutch face two end surfaces in the position detection device of FIG. 1 according to the first embodiment; In the position detecting device of FIG. 1 according to the first embodiment, the teeth of one clutch forming part of the dog clutch are opposed to the end face on one side in the axial direction, and the other clutch forming part is opposed to the end face on the other side in the axial direction. is a diagram showing a state in which the holes of are facing each other. In the position detecting device of FIG. 1 according to the first embodiment, the hole portion of one clutch forming part of the dog clutch faces the end face on one side in the axial direction, and the other clutch forming part faces the end face on the other side in the axial direction. is a diagram showing a state in which the tooth portions of are facing each other. In the position detecting device of FIG. 1 according to the first embodiment, the tooth portion of the clutch forming portion on one side of the dog clutch is opposed to the end face on the one side in the axial direction, and the clutch on the other side is opposed to the end face on the other side in the axial direction. It is a figure which shows the state which the tooth|gear part of a structure part has opposed. FIG. 2 is a view of the position detection device of FIG. 1 according to the first embodiment, in which the axial centerlines of the two clutch forming portions of the dog clutch are aligned with the axial centerline of the position detection device. FIG. 2 is a diagram in which the axial centerline of the position detecting device of FIG. 1 according to the first embodiment is displaced from the axial centerlines of the two clutch forming portions of the dog clutch; FIG. 10 is a timing chart of sensor signals of a magnetic detection element in the position detection device of FIG. 9 in the first embodiment; 11 is a timing chart of sensor signals of the magnetic detection element in the position detection device of FIG. 10 in the first embodiment; FIG. FIG. 5 is an enlarged view of the position detection device according to the second embodiment, and is a view corresponding to FIG. 4 ; It is the figure which expanded the position detection apparatus in 3rd Embodiment, and is a figure corresponded to FIG. It is the figure which expanded the position detection apparatus in 4th Embodiment, and is a figure corresponded to FIG. It is the figure which expanded the position detection apparatus in 5th Embodiment, and is a figure corresponded to FIG. It is the figure which expanded the position detection apparatus in 6th Embodiment, and is a figure corresponded to FIG. It is the figure which expanded the position detection apparatus in 7th Embodiment, and is a figure corresponded to FIG. It is the figure which expanded the position detection apparatus in 8th Embodiment, and is a figure corresponded to FIG. It is the figure which expanded the position detection apparatus in 9th Embodiment, and is a figure corresponded to FIG. In the position detecting device of FIG. 20 according to the ninth embodiment, the hole portion of the clutch forming portion on one side of the dog clutch faces the end face on the one side in the axial direction, and the clutch on the other side faces the end face on the other side in the axial direction. It is a figure which shows the state which the hole part of a structure part has opposed. In the position detecting device of FIG. 20 according to the ninth embodiment, the teeth of one clutch-constituting portion face the end face on one side in the axial direction, and the holes of the other clutch-constituting portion face the end face on the other side in the axial direction. It is a figure which shows the state which the part has opposed. In the position detecting device of FIG. 20 according to the ninth embodiment, the hole portion of one of the clutch-constituting portions faces the end face on one side in the axial direction, and the tooth of the other clutch-constituting portion faces the end face on the other side in the axial direction. It is a figure which shows the state which the part has opposed. In the position detecting device of FIG. 20 according to the ninth embodiment, the teeth of one clutch component face the end face on one side in the axial direction, and the teeth of the other clutch component face the end face on the other side in the axial direction. It is a figure which shows the state which the part has opposed. It is the figure which expanded the position detection apparatus in 10th Embodiment, and is a figure corresponded to FIG. In the position detecting device of FIG. 25 according to the tenth embodiment, the hole of one clutch-constituting portion faces the end face on one side in the axial direction, and the hole of the other clutch-constituting portion faces the end face on the other side in the axial direction. It is a figure which shows the state which the part has opposed. In the position detecting device of FIG. 25 according to the tenth embodiment, the hole portion of one of the clutch-constituting portions faces the end face on one side in the axial direction, and the teeth of the other clutch-constituting portion face the end face on the other side in the axial direction. It is a figure which shows the state which the part has opposed. In the position detecting device of FIG. 25 according to the tenth embodiment, the teeth of one clutch-constituting portion are opposed to the end face on one side in the axial direction, and the holes of the other clutch-constituting portion are opposed to the end face on the other side in the axial direction. It is a figure which shows the state which the part has opposed. In the position detecting device of FIG. 25 according to the tenth embodiment, the teeth of one clutch component face the end face on one side in the axial direction, and the teeth of the other clutch component face the end face on the other side in the axial direction. It is a figure which shows the state which the part has opposed. It is the figure which expanded the position detection apparatus in 11th Embodiment, and is a figure corresponded to FIG. It is the figure which expanded the position detection apparatus in 12th Embodiment, and is a figure corresponded to FIG. FIG. 22 is an enlarged view of the shape of the magnetic flux path portion of the position detection device according to the thirteenth embodiment; FIG. 20 is an enlarged view of the shape of the magnetic flux path portion of the position detection device according to the fourteenth embodiment; FIG. 22 is an enlarged view of the shape of the magnetic flux path portion of the position detection device in the fifteenth embodiment; FIG. 20 is an enlarged view of the shape of the magnetic flux path portion of the position detection device according to the sixteenth embodiment; FIG. 22 is an enlarged view of the shape of the magnetic flux path portion of the position detection device in the seventeenth embodiment; FIG. 22 is an enlarged view of the shape of the magnetic flux path portion of the position detection device in the eighteenth embodiment; FIG. 20 is an enlarged view of the shape of the magnetic flux path portion of the position detection device in the nineteenth embodiment; FIG. 20 is an enlarged view of the shape of the magnetic flux path portion of the position detection device according to the twentieth embodiment; FIG. 22 is an enlarged view of the shape of the magnetic flux path portion of the position detection device in the twenty-first embodiment; FIG. 20 is an enlarged view of the shape of the magnetic flux path portion of the position detection device in the twenty-second embodiment; FIG. 20 is an enlarged view of the shape of the magnetic flux path portion of the position detection device in the twenty-third embodiment; FIG. 20 is an enlarged view of the shape of the magnetic flux path portion of the position detection device in the twenty-fourth embodiment; FIG. 20 is an enlarged view of the shape of the magnetic flux path portion of the position detection device in the twenty-fifth embodiment; FIG. 26 is an external view of the overall configuration of the power transmission system according to the twenty-sixth embodiment as seen from the outside in the radial direction centering on the axis, and is a view showing a state in which two clutch forming portions of the dog clutch are separated, and a magnetic detection element; be. FIG. 26 is a perspective view of the overall configuration of the power transmission system according to the twenty-sixth embodiment as seen from the outside in the radial direction centering on the axis, and is a view showing a state in which two clutch forming portions in the dog clutch are separated, and a magnetic detection element; be. FIG. 20 is a perspective view of the overall configuration of the power transmission system according to the twenty-sixth embodiment as seen from the other side in the axial direction, and is a view showing one clutch-constituting portion of the dog clutch and a magnetic detection element; In the twenty-sixth embodiment, when the teeth of one clutch-constituting portion face the teeth of the other clutch-constituting portion, and the holes of one clutch-constituting portion face the holes of the other clutch-constituting portion. 3 is a timing chart of the sensor signal of the magnetic detection element. FIG. 20 is a diagram showing the arrangement relationship between the magnetic detection element and two clutch components, and the direction of magnetic flux passing through the detection section of the magnetic detection element in the twenty-sixth embodiment; FIG. 20 is a diagram showing the arrangement relationship between the magnetic detection element and two clutch components, and the direction of magnetic flux passing through the detection section of the magnetic detection element in the twenty-sixth embodiment; FIG. 20 is a diagram showing the arrangement relationship between the magnetic detection element and two clutch components, and the direction of magnetic flux passing through the detection section of the magnetic detection element in the twenty-sixth embodiment; FIG. 20 is a diagram showing the arrangement relationship between the magnetic detection element and two clutch components, and the direction of magnetic flux passing through the detection section of the magnetic detection element in the twenty-sixth embodiment; 19 is a timing chart of sensor signals of the magnetic detection element when the teeth of one clutch-constituting portion and the hole of the other clutch-constituting portion face each other in the twenty-sixth embodiment; FIG. 20 is a diagram showing the arrangement relationship between the magnetic detection element and two clutch components, and the direction of magnetic flux passing through the detection section of the magnetic detection element in the twenty-sixth embodiment; FIG. 20 is a diagram showing the arrangement relationship between the magnetic detection element and two clutch components, and the direction of magnetic flux passing through the detection section of the magnetic detection element in the twenty-sixth embodiment; FIG. 20 is a diagram showing the arrangement relationship between the magnetic detection element and two clutch components, and the direction of magnetic flux passing through the detection section of the magnetic detection element in the twenty-sixth embodiment; FIG. 20 is a diagram showing the arrangement relationship between the magnetic detection element and two clutch components, and the direction of magnetic flux passing through the detection section of the magnetic detection element in the twenty-sixth embodiment; FIG. 12 is a timing chart of sensor signals output from the magnetic detection element when rotating the two clutch components to change the relative speed between the two clutch components in the twenty-sixth embodiment; FIG. FIG. 26 is a block diagram showing the electrical configuration of a power transmission system in a twenty-sixth embodiment; 60 is a flowchart showing details of clutch control processing in the control device of FIG. 59; FIG. 20 is a perspective view of the overall configuration of the power transmission system in the twenty-seventh embodiment as viewed from the other side in the axial direction, and is a view showing one clutch-constituting portion of the dog clutch and a magnetic detection element; In the twenty-seventh embodiment, when the teeth of one clutch-constituting portion face the teeth of the other clutch-constituting portion, and the holes of one clutch-constituting portion face the holes of the other clutch-constituting portion. 3 is a timing chart of the sensor signal of the magnetic detection element. FIG. 20 is a diagram showing the arrangement relationship between the magnetic detection element and two clutch components, and the direction of magnetic flux passing through the detection section of the magnetic detection element in the twenty-seventh embodiment; FIG. 20 is a diagram showing the arrangement relationship between the magnetic detection element and two clutch components, and the direction of magnetic flux passing through the detection section of the magnetic detection element in the twenty-seventh embodiment; FIG. 20 is a diagram showing the arrangement relationship between the magnetic detection element and two clutch components, and the direction of magnetic flux passing through the detection section of the magnetic detection element in the twenty-seventh embodiment; FIG. 20 is a diagram showing the arrangement relationship between the magnetic detection element and two clutch components, and the direction of magnetic flux passing through the detection section of the magnetic detection element in the twenty-seventh embodiment; FIG. 20 is a timing chart of sensor signals of the magnetic detection element when the teeth of one clutch-constituting portion and the hole of the other clutch-constituting portion face each other in the twenty-seventh embodiment; FIG. FIG. 20 is a diagram showing the arrangement relationship between the magnetic detection element and two clutch components, and the direction of magnetic flux passing through the detection section of the magnetic detection element in the twenty-seventh embodiment; FIG. 20 is a diagram showing the arrangement relationship between the magnetic detection element and two clutch components, and the direction of magnetic flux passing through the detection section of the magnetic detection element in the twenty-seventh embodiment; FIG. 20 is a diagram showing the arrangement relationship between the magnetic detection element and two clutch components, and the direction of magnetic flux passing through the detection section of the magnetic detection element in the twenty-seventh embodiment; FIG. 20 is a diagram showing the arrangement relationship between the magnetic detection element and two clutch components, and the direction of magnetic flux passing through the detection section of the magnetic detection element in the twenty-seventh embodiment; FIG. 20 is a timing chart of sensor signals output from magnetic detection elements when rotating two clutch components to change the relative speed between the two clutch components in the twenty-seventh embodiment; FIG. FIG. 12 is an external view of the overall configuration of a power transmission system according to a twenty-eighth embodiment viewed from the outside in the radial direction centering on the axis, and is a view showing a state in which two clutch forming portions of a dog clutch are separated and a magnetic detection element; be. FIG. 28 is a perspective view of the overall configuration of the power transmission system according to the twenty-eighth embodiment as viewed from the outside in the radial direction centering on the axis, and is a view showing a state in which two clutch forming portions of the dog clutch are separated and a magnetic detection element; be. In the twenty-eighth embodiment, when the teeth of one clutch-constituting portion face the teeth of the other clutch-constituting portion, and the holes of one clutch-constituting portion face the holes of the other clutch-constituting portion. 3 is a timing chart of the sensor signal of the magnetic detection element. In the twenty-eighth embodiment, the teeth of one clutch-constituting portion face the holes of the other clutch-constituting portion, and the holes of one clutch-constituting portion face the teeth of the other clutch-constituting portion. 3 is a timing chart of a sensor signal of a magnetic detection element; FIG. 20 is a timing chart of sensor signals output from the magnetic detection element when rotating the two clutch components to change the relative speed between the two clutch components in the twenty-eighth embodiment; FIG. FIG. 14 is a flow chart showing details of clutch control processing in a control device in a twenty-eighth embodiment; FIG. FIG. 20 is a flow chart showing details of engagement determination processing in the control device in the twenty-eighth embodiment; FIG. FIG. 29 is a perspective view of the overall configuration of a power transmission system according to a twenty-ninth embodiment as seen from the outside in the radial direction centering on the axis, and is a view showing a state in which two clutch forming portions in a dog clutch are separated, and a magnetic detection element; be. In the twenty-ninth embodiment, when the teeth of one clutch-constituting portion face the teeth of the other clutch-constituting portion, and the holes of one clutch-constituting portion face the holes of the other clutch-constituting portion. 3 is a timing chart of the sensor signal of the magnetic detection element. In the twenty-ninth embodiment, when the teeth of one clutch-constituting portion face the holes of the other clutch-constituting portion, and the holes of one clutch-constituting portion face the teeth of the other clutch-constituting portion. 3 is a timing chart of the sensor signal of the magnetic detection element. FIG. 14 is a timing chart of sensor signals output from the magnetic detection element when rotating the two clutch components to change the relative speed between the two clutch components in the twenty-ninth embodiment; FIG. FIG. 10 is a timing chart of sensor signals output from magnetic detection elements when rotating two clutch components to change the relative speed between the two clutch components in another embodiment. FIG. FIG. 10 is a timing chart of sensor signals output from magnetic detection elements when rotating two clutch components to change the relative speed between the two clutch components in another embodiment. FIG. FIG. 10 is a timing chart of sensor signals output from magnetic detection elements when rotating two clutch components to change the relative speed between the two clutch components in another embodiment. FIG. FIG. 20 is a flow chart showing details of engagement determination processing in the control device in the twenty-eighth embodiment; FIG.

An embodiment of the present invention will be described below with reference to the drawings. In addition, in each of the following embodiments, the same or equivalent portions are given the same reference numerals in the drawings for the sake of simplification of explanation.

(First embodiment)
A power transmission system 1 of the first embodiment will be described with reference to FIGS. 1 to 3 and the like.

The power transmission system 1 includes a dog clutch 10, a position detection device 20, a drive source 30, an actuator 40, and a control device 50, as shown in FIG.

The dog clutch 10 includes clutch forming portions 11 and 12 . As shown in FIGS. 1 and 2, the clutch component 11 is a second clutch component configured to be rotatable about the axis S and having a plurality of teeth 11a and a plurality of holes 11b.

Each of the plurality of tooth portions 11a is a second tooth portion formed so as to protrude toward one side in the axial direction. The axial direction is a predetermined direction in which the axis S extends. An axis S is a virtual line extending in the axial direction. Each of the plurality of holes 11b is a second hole formed so as to be recessed toward the other side in the axial direction.

The plurality of tooth portions 11a and the plurality of hole portions 11b are arranged alternately in the circumferential direction around the axis S, one by one. The clutch component 11 of this embodiment is configured to be movable in the axial direction.

The clutch forming portion 12 is arranged on one side in the axial direction with respect to the clutch forming portion 11 . The clutch-constituting portion 12 transmits the rotational force transmitted from the clutch-constituting portion 11 to a transmitted portion (not shown). The clutch forming portion 12 is a first clutch forming portion configured to be rotatable about the axis S and having a plurality of tooth portions 12a and a plurality of hole portions 12b.

As shown in FIGS. 1 and 3, each of the plurality of tooth portions 12a is a first tooth portion formed so as to protrude toward the other side in the axial direction. Each of the plurality of holes 12b is a first hole formed so as to be recessed on one side in the axial direction. The plurality of tooth portions 12a and the plurality of hole portions 12b are arranged alternately in the circumferential direction around the axis S, one by one.

In the present embodiment, each of the clutch forming portions 11 and 12 is made of a magnetic material containing iron. That is, the plurality of tooth portions 11a and the plurality of tooth portions 12a are each made of a magnetic material containing iron. The plurality of teeth 11a, the plurality of holes 11b, the plurality of teeth 12a, and the plurality of holes 12b are exposed to the atmosphere.

As will be described later, the position detection device 20 rotates around the axis S by rotating the plurality of teeth 11a and the holes 11b of the clutch-constituting portion 11, the plurality of teeth 12a of the clutch-constituting portion 12, and the plurality of teeth 12a. positional relationship with the hole 12b. Details of the configuration of the position detection device 20 will be described later.

The drive source 30 is configured by, for example, an electric motor or an engine, and applies a rotational force to the clutch-constituting portion 11 to rotate the clutch-constituting portion 11 about the axis S. As shown in FIG. The actuator 40 moves the clutch forming portion 11 to one side in the axial direction or the other side in the axial direction, as will be described later.

The actuator 40 of this embodiment is configured by an electric motor or an electromagnetic solenoid.

The control device 50 is configured by a microcomputer, memory, etc., and controls the drive source 30 . Additionally, the control device 50 controls the actuator 40 based on the sensor signal output from the position detection device 20 .

Next, the operation of the power transmission system 1 of this embodiment will be described.

First, the control device 50 controls the driving source 30 to apply rotational force about the axis S from the driving source 30 to the clutch constituting portion 11 in a state where the clutch constituting portion 11 of the dog clutch 10 is separated from the clutch constituting portion 12. .

Here, when the clutch forming portion 11 is separated from the clutch forming portion 12, the plurality of tooth portions 11a are removed from the plurality of holes 12b, and the plurality of tooth portions 12a are removed from the plurality of hole portions 11b. is in a state

At this time, the clutch component 11 rotates around the axis S by the torque output from the drive source 30 .

On the other hand, the clutch component 12 is rotated by a torque output from another drive source (not shown).

The position detection device 20 detects the positional relationship of the clutch components 11 and 12 in the rotational direction about the axis S, and outputs a sensor signal indicating the detected positional relationship in the rotational direction to the control device 50 .

The positional relationship in the rotational direction is the positional relationship in the rotational direction between the plurality of teeth 11a and the plurality of holes 11b of the clutch forming portion 11 and the plurality of teeth 12a and the plurality of holes 12b of the clutch forming portion 12. .

Based on the sensor signal output from the position detection device 20, the control device 50 repeatedly determines as follows.

That is, the control device 50 allows each of the plurality of tooth portions 11a to face one of the plurality of hole portions 12b, and each of the plurality of tooth portions 12a to face one of the plurality of hole portions 12b. It is determined whether or not it is facing any of the holes 12b.

In the control device 50, each of the plurality of teeth 11a faces one of the plurality of holes 12b, and each of the plurality of teeth 12a faces one of the plurality of holes 11b. is in a state facing the hole 12b.

The controller 50 then controls the actuator 40 . Along with this, the actuator 40 is controlled by the control device 50 to push out the clutch forming portion 11 to one side in the axial direction. Therefore, the clutch forming portion 11 moves to one side in the axial direction by the driving force from the actuator 40 .

Therefore, each of the plurality of teeth 11a enters one of the plurality of holes 12b, and each of the plurality of teeth 12a enters one of the plurality of holes 11b. 12b.

As a result, the clutch component 11 is connected to the clutch component 12 . Therefore, the rotational force of the clutch-constituting portion 11 is transmitted to the clutch-constituting portion 12 . Therefore, the clutch component 12 rotates around the axis S together with the clutch component 11 . At this time, the rotational force output from the drive source 30 is transmitted through the clutch-constituting portion 11 and the clutch-constituting portion 12 to the driven portion (not shown).

Next, the details of the structure of the position detection device 20 of this embodiment will be described with reference to FIG.

The position detection device 20 of this embodiment includes a magnet 60, a yoke 70, and a magnetic detection element 80, as shown in FIG.

The magnet 60 is arranged radially outward of the clutch forming portions 11 and 12 with the axis S as the center. Magnet 60 in this embodiment is a permanent magnet that is formed into a cube with six faces, including faces 61 and 62 .

The magnet 60 is arranged with its face 61 facing the other side in the axial direction and the face 62 facing the one side in the axial direction. The magnet 60 of this embodiment constitutes a magnetic field generator.

The surfaces 61 and 62 are a first magnetic pole portion and a second magnetic pole portion magnetized with magnetic poles different from each other. In this embodiment, the surface 61 constitutes the second magnetic pole portion on which the south pole is formed. Surface 62 is the first magnetic pole portion on which the north pole is formed.

The yoke 70 includes magnetic flux path portions 71 and 72 . The magnetic flux path portion 71 is arranged radially outward of the clutch forming portion 11 with the axis S as the center. The magnetic flux path portion 71 constitutes a second magnetic flux path portion that allows magnetic flux to pass between the clutch forming portion 11 and the surface 61 (that is, the S pole) of the magnet 60 .

The magnetic flux path portion 72 is arranged radially outward of the clutch forming portion 12 about the axis S. As shown in FIG. The magnetic flux path portion 72 constitutes a first magnetic flux path portion that allows magnetic flux to pass between the clutch forming portion 12 and the surface 62 (that is, the N pole) of the magnet 60 .

The magnetic flux path portion 72 includes a radial path portion 72a and a projecting path portion 72b. The radial path portion 72a has an end face 72c as a first end face that faces the tooth portion 12a or the hole portion 12b of the clutch forming portion 12, and extends radially outward from the end face 72c around the axis S. ing.

The protruding path portion 72b protrudes from the radially outer end portion of the radial path portion 72a toward the other side in the axial direction. The tip side of the projecting path portion 72b is in contact with the surface 61 of the magnet 60. As shown in FIG.

The magnetic flux path portion 71 is arranged radially outward of the clutch forming portion 11 with the axis S as the center. The magnetic flux path portion 71 configures a magnetic flux path that allows magnetic flux to pass between the clutch forming portion 11 and the surface 61 (that is, the S pole) of the magnet 60 .

The magnetic flux path portion 71 includes a radial path portion 71a and a projecting path portion 71b. The radial path portion 71a has an end face 71c as a second end face facing the tooth portion 11a or the hole portion 11b of the clutch forming portion 12, and extends radially outward from the end face 71c around the axis S. ing.

The protruding path portion 71b protrudes from the radially outer end portion of the radial path portion 71a to one side in the axial direction. The tip side of the projecting path portion 71b is in contact with the surface 61 of the magnet 60. As shown in FIG. The magnetic detection element 80 is arranged radially outward of the clutch forming portions 11 and 12 with the axis S as the center. The magnetic detection element 80 is arranged between the magnetic flux path portions 71 and 72 .

As a result, the magnetic detection element 80 faces either the plurality of tooth portions 11 a or the plurality of hole portions 11 b of the clutch forming portion 11 .

The magnetic detection element 80 includes a detection section that detects the direction of magnetic flux, and a detection circuit that outputs a sensor signal indicating the direction of the magnetic flux detected by the detection section. Specifically, the detection unit detects the magnetic flux density in the axial direction (e.g., the horizontal direction of the paper) and the radial direction centered on the axis S (e.g., the vertical direction of the paper). and a Hall element.

Hereinafter, for convenience of explanation, the Hall element that detects the magnetic flux density in the axial direction is referred to as the X-axis Hall element, and the Hall element that detects the magnetic flux density in the radial direction about the axis S is referred to as the Y-axis Hall element.

In the detection portion of the magnetic detection element 80 of the present embodiment, when the magnetic flux density detected by the X-axis Hall element is X, the magnetic flux density detected by the Y-axis Hall element is Y, and Y/X=tan θ, The obtained angle θ is assumed to be the direction of the magnetic flux passing through the detector.

A detection circuit of the magnetic detection element 80 outputs a sensor signal indicating the direction of the magnetic flux based on the detection value of the X-axis Hall element and the detection value of the Y-axis Hall element.

Next, the operation of the position detection device 20 of this embodiment will be described with reference to FIGS. 5, 6, 7 and 8. FIG.

First, the rotational speed given to the clutch component 11 by the drive source 30 is changed to change the relative speed of one of the clutch components 11 and 12 with respect to the other clutch component. Then, in the direction of rotation about the axis S, the positional relationship between the clutch components 11 and 12 changes as shown in FIGS. 5, 6, 7, and 8, for example.

FIG. 5 shows a state in which the end face 72c of the yoke 70 faces one hole 12b out of the plurality of holes 12b, and the end face 71c of the yoke 70 faces one hole 11b out of the plurality of holes 11b. be.

In FIG. 5, the magnetic detection element 80 faces the one hole 11b and the one hole 12b.

In the case of FIG. 5, the magnetic flux that has passed through the N pole of the magnet 60 passes through the magnetic flux path portion 72, the one hole portion 12b, the one hole portion 11b, and the magnetic flux path portion 71 as indicated by the arrows. toward the south pole of magnet 60;

At this time, a magnetic flux is generated from the magnetic flux path portion 72 to the magnetic flux path portion 71 through the magnetic detecting element 80 . In this case, the magnetic flux detected by the magnetic detection element 80 is directed to the other side in the axial direction as indicated by arrow A.

FIG. 6 shows a state in which the end face 72c of the yoke 70 faces one tooth 12a out of the plurality of teeth 12a, and the end face 71c of the yoke 70 faces one hole 11b out of the plurality of holes 11b. be.

In FIG. 6, the magnetic detection element 80 faces the one tooth portion 11a and the one hole portion 11b.

In the case of FIG. 6, the magnetic flux that has passed through the N pole of the magnet 60 passes through the magnetic flux path portion 72, the one tooth portion 12a, the one hole portion 11b, and the magnetic flux path portion 71 as indicated by the arrows. toward the south pole of the magnet 60.

At this time, a magnetic flux is generated from the magnetic flux path portion 72 to the magnetic flux path portion 71 through the magnetic detecting element 80 . Furthermore, a magnetic flux is also generated from the one tooth portion 12 a passing through the magnetic detecting element 80 and directed to the magnetic flux path portion 71 .

In this case, the direction of the magnetic flux detected by the detection portion of the magnetic detection element 80 becomes as indicated by arrow B due to the influence of the one tooth portion 12a. Arrow B is the direction in which arrow A is rotated counterclockwise and inclined radially outward.

FIG. 7 shows a state in which the end surface 72c of the yoke 70 faces one hole 12b out of the plurality of holes 12b, and the end face 71c of the yoke 70 faces one tooth 11a out of the plurality of teeth 11a. be.

In FIG. 7, the magnetic detection element 80 faces the one tooth portion 11a and the one hole portion 12b.

In the case of FIG. 7, the magnetic flux that has passed through the N pole of the magnet 60 passes through the magnetic flux path portion 72, the one hole portion 12b, the one tooth portion 11a, and the magnetic flux path portion 71 as indicated by the arrows. toward the south pole of the magnet 60.

At this time, a magnetic flux is generated from the magnetic flux path portion 72 to the magnetic flux path portion 71 through the magnetic detecting element 80 . In addition to this, a magnetic flux is generated from the magnetic detection element 80 toward the one tooth portion 11a.

In this case, the direction of the magnetic flux detected by the magnetic detection element 80 becomes as indicated by arrow C due to the influence of the one tooth portion 11a. Arrow C is the direction in which arrow A rotates clockwise and is inclined radially inward.

FIG. 8 shows a state in which the end face 72c of the yoke 70 faces one tooth 12a out of the plurality of teeth 12a, and the end face 71c of the yoke 70 faces one tooth 11a out of the teeth 11a. be.

In FIG. 8, the magnetic detection element 80 faces the one tooth portion 11a and the one tooth portion 12a.

In the case of FIG. 8, the magnetic flux that has passed through the N pole of the magnet 60 passes through the magnetic flux path portion 72, the one tooth portion 12a, the one tooth portion 11a, and the magnetic flux path portion 71 as indicated by the arrows. toward the south pole of the magnet 60.

At this time, a magnetic flux is generated from the magnetic flux path portion 72 to the magnetic flux path portion 71 through the magnetic detecting element 80 . In this case, the direction of the magnetic flux detected by the detection portion of the magnetic detection element 80 is the other side in the axial direction as indicated by arrow A.

In this embodiment, as shown in FIGS. 5 and 8, when the direction of the magnetic flux detected by the detecting portion of the magnetic detection element 80 is as indicated by an arrow A, the magnetic detection element 80 detects the signal level Sa. Output the sensor signal.

As shown in FIG. 6, when the direction of the magnetic flux passing through the detection portion of the magnetic detection element 80 is as indicated by arrow B, the magnetic detection element 80 outputs a sensor signal of signal level Sb.

As shown in FIG. 7, when the direction of the magnetic flux passing through the magnetic detection element 80 is as indicated by arrow C, the magnetic detection element 80 outputs a sensor signal of signal level Sc.

In this embodiment, the signal level Sa, the signal level Sb, and the signal level Sc are set to different values.

Therefore, the magnetic detection element 80 outputs the sensor signal of the signal level Sb to the control device 50 . Alternatively, the magnetic detection element 80 outputs the sensor signal of the signal level Sc to the control device 50 .

Then, the controller 50 controls the plurality of teeth 11a to face any one of the plurality of holes 12b, and the plurality of teeth 12a to face any one of the plurality of holes 11b. It is determined to be in a state facing the portion 11b.

In this case, the control device 50 controls the actuator 40 to apply a driving force from the actuator 40 to push the clutch component 11 to one side in the axial direction. Therefore, the clutch forming portion 11 moves to one side in the axial direction by the driving force from the actuator 40 .

Therefore, each of the plurality of teeth 11a enters one of the plurality of holes 12b, and each of the plurality of teeth 12a enters one of the plurality of holes 11b. 12b. That is, the clutch component 11 is connected to the clutch component 12 .

According to the present embodiment described above, the power transmission system 1 includes the dog clutch 10 having the clutch components 11 and 12 and the position detection device 20 .

The clutch forming portion 11 is configured to be rotatable about an axis S, and has a plurality of teeth 11a projecting on one side in the axial direction and a plurality of holes 11b recessed on the other side in the axial direction. They are arranged alternately one by one in the circumferential direction.

The clutch forming portion 12 is disposed on one side in the axial direction with respect to the clutch forming portion 11, is configured to be rotatable about the axis S, and is recessed on one side in the axial direction with a tooth portion 12a that protrudes on the other side in the axial direction. The holes 12b are alternately arranged in the circumferential direction around the axis S. As shown in FIG.

When the tooth portion 11a faces the hole portion 12b and the tooth portion 12a faces inside the hole portion 11b in a state in which the drive source 30 rotates the clutch forming portion 11 around the axis S, the control device 50 controls: The actuator 40 moves the clutch component 11 toward the clutch component 12 .

As a result, the toothed portion 11a enters the hole portion 12b and the toothed portion 12a enters the hole portion 11b, and the clutch forming portion 11 is connected to the clutch forming portion 12. As shown in FIG. Therefore, the rotational force output from the drive source 30 is transmitted from the clutch-constituting portion 11 to the clutch-constituting portion 12 .

The magnetic detection element 80 rotates around the axis S in order to determine whether or not the tooth 11a faces the hole 12b and the tooth 12a faces the hole 11b. In the direction, the positional relationship between the clutch components 11 and 12 is detected.

The position detecting device 20 is arranged radially outward of the clutch forming portions 11 and 12 about the axis S, and includes a magnet 60 having surfaces 61 and 62 forming S poles and N poles having polarities different from each other. , a yoke 70 and a magnetic sensing element 80 .

The yoke 70 includes magnetic flux path portions 71 and 72 . The magnetic flux path portion 71 has an end surface 72c arranged radially outward about the axis S with respect to the tooth portion 11a or the hole portion 11b, and passes the magnetic flux from the surface 62 of the magnet 60 toward the end surface 71c.

The magnetic flux path portion 72 has an end face 71c arranged radially outward from the tooth portion 12a or the hole portion 12b about the axis S, and passes the magnetic flux from the end face 71c toward the surface 61 of the magnet 60. .

The magnetic detection element 80 is provided between the magnetic flux path portions 71 and 72 radially outward of the clutch forming portions 11 and 12 about the axis S. As shown in FIG. The magnetic detection element 80 constitutes a detection section for detecting magnetic flux, and outputs a sensor signal indicating the direction of the magnetic flux detected by the detection section.

The plurality of teeth 11a and the plurality of teeth 12a of the dog clutch 10 are each made of a magnetic material containing iron. The plurality of teeth 12a, the plurality of holes 11b, the plurality of teeth 12a, and the plurality of holes 12b of the dog clutch 10 are exposed to the atmosphere. Therefore, air is accommodated in the plurality of holes 11b and the plurality of holes 12b.

As a result, the plurality of tooth portions 11a have higher magnetic permeability than the plurality of hole portions 11b. The plurality of tooth portions 12a has higher magnetic permeability than the plurality of hole portions 12b.

The direction of the magnetic flux detected by the detection portion of the magnetic detection element 80 changes in the rotational direction about the axis S depending on the positional relationship between the clutch forming portions 11 and 12 .

In a state in which the tooth portion 11a faces the tooth portion 12a, the end surface 71c faces the tooth portion 11a, and the end face 72c faces the tooth portion 12a, the magnetic detecting element 80 is positioned as shown by an arrow A in FIG. outputs a sensor signal having a signal level Sa indicating the direction of the magnetic flux detected at .

In a state where the hole portion 11b faces the hole portion 12b, the end face 71c faces the hole portion 11b, and the end face 72c faces the hole portion 12b, the magnetic detecting element 80 moves the detection portion as indicated by the arrow A in FIG. A sensor signal having a signal level Sa indicating the direction of the passing magnetic flux is output.

In a state where the hole portion 11b faces the tooth portion 12a, the end face 71c faces the hole portion 11b, and the end face 72c faces the tooth portion 12a, the magnetic detection element 80 detects the detection portion as indicated by the arrow B in FIG. A sensor signal having a signal level Sb indicating the direction of the passing magnetic flux is output.

In a state in which the tooth portion 11a faces the hole portion 12b, the end face 71c faces the tooth portion 11a, and the end face 72c faces the second hole portion, the magnetic detection element 80 moves the detection portion as indicated by the arrow C in FIG. A sensor signal having a signal level Sc indicating the direction of the passing magnetic flux is output.

Arrows A, B, and C, which are the directions of the magnetic flux, are in different directions. The signal level Sa, signal level Sb, and signal level Sc are set to different values. As described above, the position detection device 20 that detects the positional relationship between the clutch components 11 and 12 in the direction of rotation about the axis S can be provided.

As a result, when the controller 50 controls the clutch component 11 through the actuator 40 based on the sensor signal output from the magnetism detection element 80, the clutch components 11 and 12 can be meshed normally. Therefore, it is possible to prevent damage and hammering caused by the collision of the teeth 11a and 12a.

In this embodiment, since the position detection device 20 is configured using one magnet 60, the cost can be reduced compared to the case where the position detection device 20 is configured using a plurality of magnets 60. FIG.

In this embodiment, the control device 50 determines the positional relationship between the clutch components 11 and 12 based on the direction of magnetic flux detected by the magnetic detection element 80 . Therefore, even if the position detecting device 2 is separated from the dog clutch 10 and the magnetic flux density passing through the magnetic detecting element 80 is reduced, the positional relationship between the clutch forming portions 11 and 12 can be determined satisfactorily.

In this embodiment, the positional relationship between the clutch components 11 and 12 is determined using one position detection device 20 composed of the magnet 60, the yoke 70, and the magnetic detection element 80. FIG. Therefore, even in the power transmission system 1 in which the gap between the clutch components 11 and 12 is narrow, the direction of the magnetic flux passing through the magnetic detection element 80 can be detected satisfactorily by applying the position detection device 20 .

In addition to this, it is possible to reduce the size and cost of the position detection device 20, and thus to reduce the size and cost of the power transmission system 1. FIG.

In this embodiment, since one position detection device 20 is used, the positional relationship between the clutch components 11 and 12 can be determined without performing processing such as calculation. Therefore, it is possible to improve the responsiveness when the control device 50 controls the actuator 40 .

In this embodiment, as shown in FIG. 9, the tooth portions 11a and 12a are arranged symmetrically with respect to the center line T of the position detecting device 20 in the axial direction. The centerline T is an imaginary line that passes through the midpoint of the position detection device 20 in the axial direction and extends in the radial direction with the axis S as the center. In this case, the sensor signal of the magnetic detection element 80 has a waveform that oscillates with reference voltage Vk as a reference, as shown in FIG.

On the other hand, as shown in FIG. 10, when the axial centerline T of the position detecting device 20 is shifted to one side in the axial direction with respect to the axial centerline Z between the clutch forming portions 11 and 12. 12, the sensor signal of the magnetic detection element 80 becomes as shown in FIG. The center line Z is an imaginary line that extends radially about the axis S through the midpoint between the clutch forming portions 11 and 12 in the axial direction.

The sensor signal of the magnetic detection element 80 in FIG. 12 has a waveform that oscillates with reference to the reference voltage Vf. The reference voltage Vf is a voltage value obtained by adding the offset value ΔV to the reference voltage Vk.

That is, even if the center line T of the position detection device 20 is offset in the axial direction with respect to the center line Z between the clutch forming portions 11 and 12, the sensor signal of the magnetic detection element 80 is is offset in the magnitude direction of the voltage.

When the center line T of the position detection device 20 deviates in the axial direction from the axial center line Z between the tooth portions 11a and 12a due to the assembly of the dog clutch 10 and the displacement of the clutch components 11 and 12. However, the amplitude of the waveform of the sensor signal is the same. Therefore, the control device 50 can detect the positional relationship between the clutch components 11 and 12 based on the sensor signal of the magnetic detection element 80 .

(Second embodiment)
In the above-described first embodiment, an example in which the position detection device 20 is configured using one magnet 60 has been described. The form will be described with reference to FIG. In this embodiment, for convenience of explanation, one of the two magnets 60 is a magnet 60A as a first magnet, and the other magnet is a magnet 60B as a second magnet.

The position detection device 20 of this embodiment includes magnets 60A and 60B, a yoke 70, and a magnetic detection element 80, as shown in FIG.

The magnets 60A and 60B are arranged radially outward of the clutch forming portions 11 and 12 about the axis S, respectively. The magnet 60A is arranged on one side in the axial direction with respect to the magnet 60B. Magnets 60A and 60B are each formed into a cube with six faces including faces 61 and 62 .

A surface 62 of the magnet 60A is arranged radially inward about the axis S, and a surface 61 of the magnet 60A is arranged radially outward about the axis S. A surface 61 of the magnet 60B is arranged radially inward about the axis S, and a surface 62 of the magnet 60B is arranged radially outward about the axis S.

In this embodiment, face 62 of each of magnets 60A, 60B forms a north pole. That is, the surfaces 62 of the magnets 60A and 60B have the same polarity.

Each face 61 of magnets 60A, 60B forms a south pole.

That is, the surfaces 61 of the magnets 60A and 60B have the same polarity. Magnets 60A and 60B are arranged such that the distance between magnet 60A and axis S and the distance between magnet 60B and axis S are substantially the same.

The magnets 60A and 60B of the present embodiment constitute a magnetic field generating section together with the magnetic flux path section 75 of the yoke 70. FIG. The surface 62 of the magnet 60A constitutes the first magnetic pole portion and the surface 61 of the magnet 60A constitutes the third magnetic pole portion. The surface 61 of the magnet 60B constitutes the second magnetic pole portion, and the surface 62 of the magnet 60B constitutes the fourth magnetic pole portion.

Yoke 70 includes magnetic flux path portions 73 , 74 , 75 . The magnetic flux path portion 73 is arranged radially outward of the clutch forming portion 11 with the axis S as the center. The magnetic flux path portion 73 constitutes a second magnetic flux path portion that allows magnetic flux to pass between the clutch forming portion 11 and the surface 61 (that is, the S pole) of the magnet 60B.

The magnetic flux path portion 73 has an end face 73a as a second end face facing the tooth portion 11a or the hole portion 11b of the clutch forming portion 11 . The magnetic flux path portion 73 is formed from the end face 73a to the outside in the radial direction around the axis S. As shown in FIG.

The magnetic flux path portion 74 is arranged radially outward of the clutch forming portion 12 about the axis S. As shown in FIG. The magnetic flux path portion 74 constitutes a first magnetic flux path portion that allows magnetic flux to pass between the clutch forming portion 12 and the surface 62 (that is, the N pole) of the magnet 60A.

The magnetic flux path portion 74 has an end surface 74a that faces the tooth portion 12a or the hole portion 12b of the clutch forming portion 12 . The magnetic flux path portion 74 is formed from the end face 74a to the outside in the radial direction around the axis S. As shown in FIG.

The magnetic flux path portion 75 is arranged radially outward of the magnetic flux path portions 74, 73 and the magnets 60A, 60B with the axis S as the center. Magnetic flux path portion 75 constitutes a third magnetic flux path portion that allows magnetic flux to pass between surface 61 of magnet 60A and surface 62 of magnet 60B.

Specifically, the magnetic flux path portion 75 includes an axis path 75a and protrusions 75b and 75c. The axial path 75a is formed along the axial direction between the surface 61 of the magnet 60A and the surface 62 of the magnet 60B.

The protruding portion 75b protrudes toward the surface 61 of the magnet 60A from one axial end of the axial path 75a. The protruding portion 75c protrudes toward the surface 62 of the magnet 60B from the other axial end of the axial path 75a.

The magnetic detection element 80 is arranged between the magnetic flux path portions 73 and 74 . As a result, the magnetic detection element 80 faces either the plurality of tooth portions 11 a or the plurality of hole portions 11 b of the clutch forming portion 11 . In addition to this, the magnetic detection element 80 faces one of the plurality of teeth 12 a and the plurality of holes 12 b of the clutch forming portion 12 .

The magnetic detection element 80 of this embodiment constitutes a detection section that detects the direction of the magnetic flux passing between the magnetic flux path sections 73 and 74, and outputs a sensor signal indicating the direction of the magnetic flux that passes through the detection section. The magnetic detection element 80 of the present embodiment is composed of two Hall elements as in the first embodiment.

Although the configuration of the yoke 70 and the number of magnets are different between the present embodiment and the above-described first embodiment, the magnetic circuit configured by the position detection device 20 is substantially the same. .

Therefore, the magnetic detection element 80 outputs sensor signals indicating the positional relationship of the clutch components 11 and 12 in the rotational direction about the axis S as shown in (a), (b), (c), and (d) below. Output to 50.

(a) When the end face 74a of the yoke 70 faces one of the plurality of holes 12b and the end face 73a of the yoke 70 faces one of the plurality of holes 11b, The magnetic circuit operates substantially as in FIG.

In this case, the magnetic detection element 80 faces the one hole 11b and the one hole 12b.

At this time, the magnetic flux that has passed through the N pole of the magnet 60A passes through the magnetic flux path portion 74, the one hole portion 12b, the one hole portion 11b, and the magnetic flux path portion 73 toward the S pole of the magnet 60B. The magnetic flux that has passed through the S pole of the magnet 60B passes through the magnetic flux path portion 75 and the S pole of the magnet 60A toward the N pole of the magnet 60A.

At this time, a magnetic flux is generated from the magnetic flux path portion 74 to the magnetic flux path portion 73 through the magnetic detecting element 80 . In this case, the direction of the magnetic flux passing through the detection portion of the magnetic detection element 80 is directed to the other side in the axial direction, like the arrow A in FIG. Therefore, the magnetic detection element 80 outputs a sensor signal of signal level Sa.

(b) In a state in which the end surface 74a of the yoke 70 faces one tooth 12a out of the plurality of teeth 12a and the end face 73a of the yoke 70 faces one hole 11b out of the plurality of holes 11b, The magnetic circuit operates substantially as in FIG.

In this case, the magnetic detection element 80 faces one tooth portion 12a and one hole portion 11b.

At this time, the magnetic flux that has passed through the N pole of the magnet 60A passes through the magnetic flux path portion 74, the one tooth portion 12a, the one hole portion 11b, and the magnetic flux path portion 73 toward the S pole of the magnet 60B. The magnetic flux that has passed through the S pole of the magnet 60B passes through the magnetic flux path portion 75 and the S pole of the magnet 60A toward the N pole of the magnet 60A.

At this time, a magnetic flux is generated from the magnetic flux path portion 74 to the magnetic flux path portion 73 through the magnetic detecting element 80 . A magnetic flux is also generated from the one tooth portion 12 a to the magnetic flux path portion 73 through the magnetic detecting element 80 .

In this case, the direction of the magnetic flux passing through the detection portion of the magnetic detection element 80 is rotated counterclockwise with respect to the arrow A, similar to the arrow B in FIG. Become. Therefore, the magnetic detection element 80 outputs a sensor signal of signal level Sb.

(c) When the end face 74a of the yoke 70 faces one hole 12b out of the plurality of holes 12b and the end face 73a of the yoke 70 faces one tooth 11a out of the plurality of teeth 11a, The magnetic circuit operates substantially as in FIG.

At this time, the magnetic detection element 80 faces the one tooth portion 11a and the one hole portion 12b.

At this time, the magnetic flux that has passed through the N pole of the magnet 60A passes through the magnetic flux path portion 74, the one hole portion 12b, the one tooth portion 11a, and the magnetic flux path portion 73 toward the S pole of the magnet 60B. . The magnetic flux that has passed through the S pole of the magnet 60B passes through the magnetic flux path portion 75 and the S pole of the magnet 60A toward the N pole of the magnet 60A.

In addition, a magnetic flux is also generated from the magnetic flux path portion 74, passing through the magnetic detecting element 80 and directed to the one tooth portion 11a.

In this case, the direction of the magnetic flux passing through the detection portion of the magnetic detection element 80 is rotated clockwise with respect to the arrow A due to the influence of the one tooth portion 11a, like the arrow C in FIG. . Therefore, the magnetic detection element 80 outputs a sensor signal of signal level Sc.

(d) When the end face 74a of the yoke 70 faces one tooth 12a out of the plurality of teeth 12a and the end face 73a of the yoke 70 faces one tooth 11a out of the teeth 11a, The magnetic circuit operates substantially as in FIG.

At this time, the magnetic detection element 80 faces the one tooth portion 11a and the one tooth portion 12a.

At this time, the magnetic flux that has passed through the N pole of the magnet 60A passes through the magnetic flux path portion 74, the one tooth portion 12a, the one tooth portion 11a, and the magnetic flux path portion 73 toward the S pole of the magnet 60B. . The magnetic flux that has passed through the S pole of the magnet 60B passes through the magnetic flux path portion 75 and the S pole of the magnet 60A toward the N pole of the magnet 60A.

In addition to this, a magnetic flux is generated from the magnetic flux path portion 74 to the magnetic flux path portion 73 through the magnetic detecting element 80 . In this case, the direction of the magnetic flux passing through the detection portion of the magnetic detection element 80 is the other side in the axial direction, like the arrow A in FIG. Therefore, the magnetic detection element 80 outputs a sensor signal of signal level Sa.

In this embodiment described above, the signal level Sa, the signal level Sb, and the signal level Sc are set to different values. Therefore, the magnetic detection element 80 outputs the sensor signal of the signal level Sb or the sensor signal of the signal level Sc to the control device 50 .

Then, the controller 50 controls the plurality of teeth 11a to face any one of the plurality of holes 12b, and the plurality of teeth 12a to face any one of the plurality of holes 11b. It is determined to be in a state facing the portion 11b.

As described above, the position detection device 20 that detects the positional relationship between the clutch components 11 and 12 in the direction of rotation about the axis S can be provided.

In this embodiment, since the position detection device 20 is configured using two magnets 60A and 60B, the magnetic flux density detected by the magnetic detection element 80 increases compared to the first embodiment. Therefore, the robustness of the position detection device 20 can be enhanced. Here, the robustness is the ability to prevent the output from changing due to the influence of disturbance.

In the present embodiment, the two magnets 60A and 60B are used to configure the position detection device 20. Therefore, compared to the magnet 60 used in the position detection device 20 of the first embodiment, the magnets 60A and 60B have a larger physical size. can be made smaller. Therefore, the size of the position detection device 20 can be reduced.

(Third embodiment)
In the third embodiment, an example will be described in which protrusions 73d and 74d protruding toward the magnetic detection element 80 are provided in the magnetic flux path sections 73 and 74 of the yoke 70 of the position detection device 20 of the second embodiment.

The configuration of the magnetic flux path portions 73 and 74 of the yoke 70 of the position detection device 20 is the only difference between this embodiment and the above-described second embodiment, and other configurations are common.

Therefore, the magnetic flux path portions 73 and 74 of the yoke 70 of the position detecting device 20, which are the differences between the present embodiment and the second embodiment, will be mainly described below with reference to FIG.

The magnetic flux path portion 73 of the yoke 70 of the position detection device 20 is provided with a projecting portion 73d.

Specifically, the magnetic flux path portion 73 includes a magnetic flux radial path portion 73e and a projecting portion 73d. The magnetic flux radial path portion 73e is a second path forming portion formed from the end face 73a to the outside in the radial direction about the axis S. As shown in FIG. The protruding portion 73d is a second protruding portion that protrudes toward the magnetic detecting element 80 from the radially inner end of the magnetic flux radial path portion 73e about the axis S. As shown in FIG.

The projecting portion 73d of the present embodiment plays a role of guiding the magnetic flux passing through the magnetic detecting element 80 to the magnetic flux radial path portion 73e.

The magnetic flux path portion 74 of the yoke 70 of the position detection device 20 is provided with a projecting portion 74d. Specifically, the magnetic flux path portion 74 includes a magnetic flux radial path portion 74e and a projecting portion 74d. The magnetic flux radial path portion 74e is a first path forming portion formed from the end surface 74a to the outside in the radial direction about the axis S. As shown in FIG. The protruding portion 74d is a first protruding portion that protrudes from the radially inner end of the magnetic flux radial path portion 74e about the axis S toward the magnetic detecting element 80. As shown in FIG.

The projecting portion 74d of the present embodiment plays a role of guiding the magnetic flux that has passed through the magnetic flux radial path portion 74e to the magnetic detecting element 80. As shown in FIG.

According to the present embodiment described above, the magnetic detection element 80 rotates about the axis S as shown in (a), (b), (c), and (d) in the same manner as in the second embodiment. A sensor signal indicating the positional relationship between the clutch components 11 and 12 is output to the control device 50 .

The magnetic flux path portions 73 and 74 of the yoke 70 of the position detecting device 20 of this embodiment are provided with the projecting portions 73d and 74d as described above. The magnetic detection element 80 is sandwiched between the protrusions 73d and 74d. The projecting portion 74 d guides the magnetic flux that has passed through the magnetic flux radial path portion 74 e to the magnetic detecting element 80 . The projecting portion 73d guides the magnetic flux passing through the magnetic detecting element 80 to the magnetic flux radial path portion 73e.

In this embodiment, as described above, the yoke 70 is provided with the protrusions 73d and 74d. Therefore, when the positional relationship in the rotational direction of the clutch forming portions 11 and 12 is (a) and (d), the direction of the magnetic flux passing through the detection portion of the magnetic detection element 80 is set in the axial direction (for example, the horizontal direction of the paper surface). direction) can be approached with high accuracy.

Therefore, the direction of the magnetic flux detected by the magnetic detection element 80 when the positional relationship in the rotational direction of the clutch components 11 and 12 is (a) and (d) is determined by the magnetic flux detection of the X-axis Hall element of the magnetic detection element 80. In the direction, the accuracy is approached.

As a result, in the cases of (a) and (d), the magnetic flux passing through the magnetic detection element 80 in the magnetic flux detection direction of the X-axis Hall element can be increased compared to the first embodiment. Therefore, in the case of (b), the direction of the magnetic flux detected by the magnetic detection element 80 can be greatly influenced by the tooth portion 12a. In the case of (c), the direction of the magnetic flux detected by the magnetic detection element 80 can be greatly influenced by the tooth portion 11a.

Therefore, if the direction of magnetic flux detection by the X-axis Hall element is used as a reference in detecting the direction of the magnetic flux by the magnetic detection element 80, the magnetic flux detection element 80 detects the magnetic flux as the positional relationship between the clutch components 11 and 12 changes. It is possible to increase the change in the direction of the magnetic flux.

In addition to this, in the present embodiment, the yoke 70 is provided with the projecting portions 73d and 74d as described above. Therefore, the magnetic flux density passing through the magnetic detecting element 80 between the magnetic flux path portions 74 and 73 can be increased.

As described above, the robustness of the magnetic detection element 80 and thus the position detection device 20 can be improved.

(Fourth embodiment)
In the fourth embodiment, the magnetic flux path portions 73 and 74 of the yoke 70 of the position detecting device 20 of the second embodiment are provided with facing surfaces 73b and 74b that face the magnetic detection element 80 via the gaps 90a and 90b. An example will be described with reference to FIG.

The main difference between this embodiment and the above-described second embodiment is the configuration of the magnetic flux path portions 73 and 74 of the yoke 70 of the position detection device 20, and the other configurations are common.

Therefore, the magnetic flux path portions 73 and 74 of the yoke 70 of the position detecting device 20, which are the differences between the present embodiment and the second embodiment, will be mainly described below with reference to FIG.

The magnetic flux path portion 74 of the present embodiment is provided with a facing surface 74b serving as a first facing surface facing one side in the axial direction of the magnetic detecting element 80 with a gap 90a interposed therebetween. The facing surface 74b is formed so as to extend from the one side in the axial direction toward the other side in the axial direction as it approaches the radially outer side from the radially inner side about the axis S. As shown in FIG. As a result, the facing surface 74b is formed so as to be inclined with respect to the radial direction about the axis S. As shown in FIG. The facing surface 74b and the end surface 74a are connected to form a corner.

The magnetic flux path portion 73 is provided with a facing surface 73b as a second facing surface that faces the magnetic detecting element 80 on one side in the axial direction with a space 90b interposed therebetween. The facing surface 73b is formed so as to extend from the other side in the axial direction toward the one side as it approaches the radially outer side from the radially inner side about the axis S. As shown in FIG. Accordingly, the facing surface 73b is formed to be inclined with respect to the radial direction about the axis S. As shown in FIG. The facing surface 73b and the end surface 73a are connected to form a corner.

In this embodiment, the ratio of the facing surface 73b in the magnetic flux path portion 73 in the radial direction about the axis S is higher than the ratio of the remaining area 73c other than the facing surface 73b in the magnetic flux path portion 73. It's getting bigger.

The proportion of the magnetic flux path portion 74 occupied by the facing surface 74b in the radial direction about the axis S is greater than the proportion of the remaining area 74c of the magnetic flux path portion 74 other than the facing surface 74b.

According to the present embodiment described above, the magnetism detecting element 80 rotates in the direction of rotation of the clutch components 11 and 12 as shown in (a), (b), (c), and (d), as in the second embodiment. A sensor signal indicating the positional relationship is output to the control device 50 . As described above, it is possible to provide the position detection device 20 that detects the positional relationship in the rotational direction between the clutch components 11 and 12 .

In this embodiment, as described above, the magnetic flux path portion 74 is provided with the facing surface 74b, and the magnetic flux path portion 73 is provided with the facing surface 73b. Therefore, it is possible to generate a magnetic flux passing through the opposing surface 73b from the opposing surface 74b through the magnetic detecting element 80. FIG.

Therefore, the direction of the magnetic flux detected by the magnetic detection element 80 when the positional relationship in the rotational direction of the clutch components 11 and 12 is (a) and (d) is determined by the magnetic flux detection of the X-axis Hall element of the magnetic detection element 80. In the direction, the accuracy is approached.

As a result, in the cases of (a) and (d), the magnetic flux passing through the magnetic detection element 80 in the magnetic flux detection direction of the X-axis Hall element can be increased compared to the first embodiment. Therefore, as in the third embodiment, the direction of the magnetic flux detected by the magnetic detection element 80 can be greatly affected by the tooth portion 12a or the tooth portion 11a in the cases (b) and (c). can.
For this reason, as in the third embodiment, if the magnetic flux detection direction of the X-axis Hall element is used as a reference in detecting the magnetic flux direction by the magnetic detection element 80, the change in the positional relationship between the clutch constituting parts 11 and 12 As a result, the change in the direction of the magnetic flux detected by the magnetic detection element 80 can be increased. As described above, the robustness of the magnetic detection element 80 and thus the position detection device 20 can be improved.
(Fifth embodiment)
In the above four embodiments, the ratio of the facing surfaces 73b and 74b of the magnetic flux path portions 73 and 74 in the radial direction about the axis S is 73c has been described above.

Instead of this, the ratio of the facing surfaces 73b and 74b in the magnetic flux path portions 73 and 74 in the radial direction about the axis S is A description will be given of the fifth embodiment in which the ratio of .

As shown in FIG. 16, the present embodiment and the fourth embodiment are different only in facing surfaces 73b and 74b of the magnetic flux path portions 73 and 74 of the yoke 70 of the position detecting device 20, and other configurations are as follows. Common.

(Sixth embodiment)
In the above five embodiments, the example in which the position detection device 20 is configured using the magnets 60A and 60B has been described. The form will be described with reference to FIG.

This embodiment differs from the above-described five embodiments only in the configuration of the yoke 70 of the position detection device 20, and the other configurations are common.

The yoke 70 of the position detection device 20 of the present embodiment includes magnetic flux path portions 71 and 72 as in the first embodiment.

The magnetic flux path portion 71 of the yoke 70 of this embodiment is provided with a facing surface 71d as a second facing surface corresponding to the facing surface 73b of the fifth embodiment.

The facing surface 71d faces the other side in the axial direction of the magnetic detecting element 80 with a space 90b interposed therebetween. 71 d of opposing surfaces are formed so that it may go to one axial direction side from the axial direction other side, so that it approaches from the radial direction inner side centering on the axis line S to the radial direction outer side. As a result, the facing surface 71d is formed to be inclined with respect to the radial direction about the axis S. As shown in FIG.

The magnetic flux path portion 72 of the yoke 70 of the present embodiment is provided with a facing surface 72d as a first facing surface corresponding to the facing surface 74b of the fifth embodiment. The facing surface 72d faces one axial side of the magnetic detecting element 80 with a space 90a interposed therebetween.

72 d of opposing surfaces are formed so that it may go to the other axial direction side from the axial direction one side, so that it approaches from the radial direction inner side centering on the axis line S to the radial direction outer side. As a result, the facing surface 72d is formed to be inclined with respect to the radial direction about the axis S. As shown in FIG.

Therefore, according to the present embodiment, it is possible to generate a magnetic flux that passes through the opposing surface 71d from the opposing surface 72d through the magnetic detecting element 80. FIG. Therefore, the direction of the magnetic flux detected by the magnetic detection element 80 when the positional relationship in the rotational direction of the clutch components 11 and 12 is (a) and (d) is determined by the magnetic flux detection of the X-axis Hall element of the magnetic detection element 80. In the direction, the accuracy is approached.

As a result, in the cases of (a) and (d), the magnetic flux passing through the magnetic detection element 80 in the magnetic flux detection direction of the X-axis Hall element can be increased compared to the first embodiment. Therefore, as in the third embodiment, the direction of the magnetic flux detected by the magnetic detection element 80 can be greatly affected by the tooth portion 12a or the tooth portion 11a in the cases (b) and (c). can.

As a result, when the magnetic flux detection direction of the X-axis Hall element is used as a reference for detecting the direction of the magnetic flux by the magnetic detection element 80, the magnetic detection element 80 detects the magnetic flux as the positional relationship between the clutch components 11 and 12 changes. The change in direction of the applied magnetic flux can be increased. As described above, the robustness of the magnetic detection element 80 and thus the position detection device 20 can be improved.

(Seventh embodiment)
In the seventh embodiment, an example in which the magnetic flux path portions 73 and 74 of the yoke 70 of the position detection device 20 are curved in the second embodiment will be described with reference to FIG.

This embodiment differs from the second embodiment only in the yoke 70 and the magnets 60A and 60B of the position detection device 20, and the other configurations are common.

Therefore, the yoke 70 and the magnets 60A and 60B of the position detection device 20, which are the differences between the present embodiment and the second embodiment, will be described below with reference to FIG.

In this embodiment, the axial dimension of each of the magnets 60A and 60B is larger than the radial dimension about the axis S of the magnetic flux path portion 75 .

In the magnetic flux path portion 75, the axial dimension of the projecting portion 75b is larger than the radial dimension about the axis S of the axial path 75a. The axial dimension of the projecting portion 75c is larger than the radial dimension about the axis S of the axial path 75a.

An inner peripheral portion 76a and an outer peripheral portion 76b are formed in the connecting portion 76 to which the axial path 75a and the projecting portion 75b are connected. The inner peripheral portion 76a is formed in a curved shape recessed in the first direction Ka. The outer peripheral portion 76b is formed in a curved shape that protrudes in the first direction Ka. The first direction Ka is the direction indicated by an arrow obtained by rotating the arrow pointing to one side in the axial direction in FIG. 18 clockwise.

A connecting portion 77 to which the axial path 75a and the projecting portion 75c are connected has an inner peripheral portion 77a and an outer peripheral portion 77b formed in a curved shape.

The inner peripheral portion 77a is formed in a curved shape recessed in the second direction Kb. The outer peripheral portion 77b is formed in a curved shape that protrudes in the second direction Kb. The second direction Kb is the direction indicated by an arrow obtained by rotating the arrow pointing to the other side in the axial direction in FIG. 18 counterclockwise.

An outer peripheral portion 78a of the magnetic flux path portion 74 is formed in a curved shape that protrudes in the third direction Kc. The third direction Kc is the direction indicated by an arrow obtained by rotating the arrow pointing to one side in the axial direction in FIG. 18 counterclockwise. An inner peripheral portion 78b of the magnetic flux path portion 74 is formed radially around the axis S. As shown in FIG.

An outer peripheral portion 79a of the magnetic flux path portion 73 is formed in a curved shape that protrudes in the fourth direction Kd. The fourth direction Kd is the direction indicated by an arrow obtained by rotating the arrow pointing to the other side in the axial direction in FIG. 18 clockwise. An inner peripheral portion 79b of the magnetic flux path portion 73 is formed radially around the axis S. As shown in FIG.

In this manner, the inner peripheral portions 76a, 77a, the outer peripheral portions 76b, 77b, the outer peripheral portion 78a of the magnetic flux path portion 74, and the outer peripheral portion 79a of the magnetic flux path portion 73 of the magnetic flux path portion 75 are each formed in a curved shape.

Note that the first direction Ka, the second direction Kb, the third direction Kc, and the fourth direction Kd are directions that face different directions, cross the axial direction, and are radial directions about the axis S. It is the direction that intersects with the direction.

Therefore, the magnetic flux can smoothly pass through the yoke 70 between the magnets 60A, 60B and the magnetic detection element 80 . In addition to this, as described above, the outer peripheral portion 78a of the magnetic flux path portion 74 is formed in a curved shape that protrudes in the third direction Kc. An outer peripheral portion 79a of the magnetic flux path portion 73 is formed in a curved shape that protrudes in the fourth direction Kd.

In this embodiment, the outer peripheral portion 78a is a first side surface that is arranged on one side in the axial direction of the magnetic flux path portion 74 and extends radially outward from the end surface 74a about the axis.
The inner peripheral portion 78b is a second side surface that is arranged on the other side in the axial direction of the magnetic flux path portion 74 and extends radially outward from the end surface 74a about the axis.

Here, the outer peripheral portion 78a is formed in a curved shape so that the distance between the outer peripheral portion 78a and the inner peripheral portion 78b becomes smaller as the magnetic detecting element 80 is approached in the radial direction about the axis S.

In this embodiment, the inner peripheral portion 79b is a third side surface that is arranged on one side in the axial direction of the magnetic flux path portion 73 and extends radially outward from the end surface 73a centering on the axial line.
The outer peripheral portion 79a is a fourth side surface that is arranged on the other side in the axial direction of the magnetic flux path portion 74 and extends radially outward from the end surface 73a about the axis.

Here, the outer peripheral portion 79a is curved so that the distance between the outer peripheral portion 79a and the inner peripheral portion 79b becomes smaller as the magnetic detecting element 80 is approached in the radial direction about the axis S.

As described above, according to the present embodiment, the magnetic flux density passing through the magnetic detecting element 80 between the magnets 60A and 60B is increased compared to the case where the outer peripheral portions 78a and 79a are formed parallel to the radial direction about the axis S. be able to. Therefore, the direction of the magnetic flux can be detected by the magnetic detection element 80 satisfactorily. As a result, the robustness of the magnetic detection element 80 and thus the position detection device 20 can be improved.

(Eighth embodiment)
In the eighth embodiment, in the above-described second embodiment, the magnetic detecting device is formed so as to protrude radially inward about the axis S from the end surface 73a of the magnetic flux path portion 73 and the end surface 74a of the magnetic flux path portion 74. An example using the element 80 will be described with reference to FIG.

The present embodiment and the above-described second embodiment differ only in the arrangement of the magnetic detection elements 80 of the yoke 70 of the position detection device 20, and the other configurations are common. Therefore, the magnetic detection element 80 of this embodiment will be described.

The magnetic detection element 80 is formed to protrude radially inward about the axis S from the end surfaces 73 a and 74 a of the magnetic flux path portions 73 and 74 . Therefore, the radially inner end surface 81 of the magnetic detecting element 80 centered on the axis S is arranged radially inwardly centered on the axis S from the end surfaces 73a and 74a of the magnetic flux path portions 73 and 74. .

As a result, the magnetic detection element 80 can be brought closer to the clutch-constituting portions 11 and 12 than in the second embodiment, so that the magnetic detection element 80 can be arranged at a portion where the magnetic flux changes greatly. Therefore, the change in the direction of the magnetic flux passing through the magnetic detection element 80 caused by the change in the positional relationship between the clutch components 11 and 12 increases. As a result, the robustness of the magnetic detection element 80 and thus the position detection device 20 can be improved.

(Ninth embodiment)
In the ninth embodiment, the surfaces 62 of the magnets 60A and 60B are arranged facing radially inward about the axis S, and the surfaces 61 of the magnets 60A and 60B are arranged about the axis S in the second embodiment. With reference to FIG. 20, an example of arranging them toward the outside in the radial direction will be described.

The present embodiment and the above-described second embodiment differ only in the arrangement of the surfaces 61 and 62 of the magnets 60A and 60B of the yoke 70 of the position detection device 20, and the other configurations are common. Therefore, the magnets 60A and 60B of this embodiment will be described.

The magnets 60A and 60B are arranged so that their surfaces 62 face radially inward about the axis S. As shown in FIG. For this reason, the magnets 60A and 60B are arranged so that their north poles face radially inward about the axis S. As shown in FIG.

In this embodiment, the surface 62 of the magnet 60A constitutes the first magnetic pole portion, and the surface 62 of the magnet 60B constitutes the second magnetic pole portion. As a result, the magnets 60A, 60B have the same polarity on their faces 62. As shown in FIG.

The magnets 60A and 60B are arranged so that their surfaces 61 face outward in the radial direction about the axis S. As shown in FIG. For this reason, the magnets 60A and 60B are arranged so that their south poles face radially outward with respect to the axis S. As shown in FIG.

In this embodiment, the surface 61 of the magnet 60A constitutes the third magnetic pole portion, and the surface 61 of the magnet 60B constitutes the fourth magnetic pole portion. As a result, the magnets 60A and 60B have the same polarity on their surfaces 61. As shown in FIG.

The magnets 60A and 60B of the present embodiment constitute a magnetic field generating section together with the magnetic flux path section 75 of the yoke 70. FIG. The surface 62 of the magnet 60A constitutes the first magnetic pole portion and the surface 61 of the magnet 60A constitutes the third magnetic pole portion. The surface 62 of the magnet 60B constitutes the second magnetic pole portion, and the surface 61 of the magnet 60B constitutes the fourth magnetic pole portion.

In this embodiment, the magnets 60A and 60B are arranged such that the distance between the magnet 60A and the axis S and the distance between the magnet 60B and the axis S are the same.

In the present embodiment configured as described above, the magnetic detection element 80 rotates in the clutch forming portions 11 and 12 as in (e), (f), (g), and (h) below in the same manner as in the first embodiment. A sensor signal indicating the positional relationship of the directions is output to the control device 50 .

(e) When the end face 74a of the yoke 70 faces one hole 12b out of the plurality of holes 12b and the end face 73a of the yoke 70 faces one hole 11b out of the plurality of holes 11b, The magnetic circuit operates as in FIG.

In this case, the magnetic detection element 80 faces the one hole 11b and the one hole 12b.

At this time, the magnetic flux generated from the magnet 60A is directed from the magnetic flux path portion 74 to the one hole portion 12b. The magnetic flux generated from the magnet 60B travels from the magnetic flux path portion 73 to the one hole portion 11b.

In addition, the magnetic flux from the magnetic flux path portion 73 and the magnetic flux from the magnetic flux path portion 74 pass through the magnetic detection element 80 . Therefore, a composite magnetic flux obtained by synthesizing the magnetic flux from the magnetic flux path portion 73 and the magnetic flux from the magnetic flux path portion 74 passes through the detection portion of the magnetic detection element 80 . The magnetic flux passing through the detection portion of the magnetic detection element 80 is directed radially inward about the axis S as indicated by an arrow D. As shown in FIG. Therefore, the magnetic detection element 80 outputs a sensor signal of signal level Sd.

(f) In a state in which the end surface 74a of the yoke 70 faces one tooth 12a out of the plurality of teeth 12a and the end face 73a of the yoke 70 faces one hole 11b out of the plurality of holes 11b, The magnetic circuit operates as in FIG.

In this case, the magnetic detection element 80 faces one tooth portion 12a and one hole portion 11b.

At this time, the magnetic flux generated from the magnet 60A travels from the magnetic flux path portion 74 to the one tooth portion 12a. The magnetic flux generated from the magnet 60B travels from the magnetic flux path portion 73 to the one hole portion 11b.

In addition, the magnetic flux from the magnetic flux path portion 73 and the magnetic flux from the magnetic flux path portion 74 pass through the magnetic detection element 80 . At this time, a magnetic flux is also generated from the magnetic detection element 80 toward the one tooth portion 12a. Therefore, a combined magnetic flux, which is obtained by synthesizing the magnetic flux from the magnetic flux path portion 73 and the magnetic flux from the magnetic flux path portion 74 , passes through the magnetic detecting element 80 .

Therefore, the direction of the magnetic flux passing through the magnetic detecting element 80 is as indicated by an arrow E due to the influence of the one tooth portion 12a. The arrow E is inclined from the arrow D toward one side in the axial direction. Therefore, the magnetic detection element 80 outputs a sensor signal of signal level Se.

(g) When the end surface 74a of the yoke 70 faces one hole 12b out of the plurality of holes 12b and the end face 73a of the yoke 70 faces one tooth 11a out of the plurality of teeth 11a, The magnetic circuit operates as in FIG.

At this time, the magnetic detection element 80 faces the one tooth portion 11a and the one hole portion 12b.

At this time, the magnetic flux generated from the magnet 60A is directed from the magnetic flux path portion 74 to the one hole portion 12b. The magnetic flux generated by the magnet 60B travels from the magnetic flux path portion 73 to the one tooth portion 11a.

In addition, the magnetic flux from the magnetic flux path portion 73 and the magnetic flux from the magnetic flux path portion 74 pass through the magnetic detection element 80 . At this time, a magnetic flux is also generated from the magnetic detection element 80 toward the one tooth portion 11a. Therefore, a combined magnetic flux, which is obtained by synthesizing the magnetic flux from the magnetic flux path portion 73 and the magnetic flux from the magnetic flux path portion 74 , passes through the magnetic detecting element 80 .

Therefore, the direction of the magnetic flux passing through the magnetic detecting element 80 is as indicated by the arrow F due to the influence of the one tooth portion 11a. The arrow F is slanted from the arrow D toward the other side in the axial direction. Therefore, the magnetic detection element 80 outputs a sensor signal of signal level Sf.

(h) When the end face 74a of the yoke 70 faces one tooth 12a out of the plurality of teeth 12a and the end face 73a of the yoke 70 faces one tooth 11a out of the teeth 11a, The magnetic circuit operates as in FIG.

At this time, the magnetic detection element 80 faces the one tooth portion 11a and the one tooth portion 12a.

At this time, the magnetic flux generated from the magnet 60A travels from the magnetic flux path portion 74 to the one tooth portion 12a. The magnetic flux generated by the magnet 60B travels from the magnetic flux path portion 73 to the one tooth portion 11a.

In addition, the magnetic flux from the magnetic flux path portion 73 and the magnetic flux from the magnetic flux path portion 74 pass through the magnetic detection element 80 . Therefore, a combined magnetic flux, which is obtained by synthesizing the magnetic flux from the magnetic flux path portion 73 and the magnetic flux from the magnetic flux path portion 74 , passes through the magnetic detecting element 80 .

Therefore, the magnetic flux passing through the magnetic detection element 80 is directed radially inward about the axis S as indicated by an arrow D. As shown in FIG. Therefore, the magnetic detection element 80 outputs a sensor signal of signal level Sd.

In the embodiment described above, the signal level Sd, the signal level Se, and the signal level Sf are set to different values. Therefore, the magnetic detection element 80 outputs the sensor signal with the signal level Se or the sensor signal with the signal level Sf to the control device 50 .

Then, the controller 50 controls the plurality of teeth 11a to face any one of the plurality of holes 12b, and the plurality of teeth 12a to face any one of the plurality of holes 11b. It is determined to be in a state facing the portion 11b.

As described above, it is possible to provide the position detection device 20 that detects the positional relationship in the rotational direction between the clutch components 11 and 12 .

In this embodiment, since the position detection device 20 is configured using two magnets 60A and 60B, the magnetic flux detected by the magnetic detection element 80 increases as in the second embodiment. Therefore, the robustness of the position detection device 20 can be enhanced.

In this embodiment, since the position detection device 20 is configured using two magnets 60A and 60B, as in the second embodiment, compared to the magnet 60 used in the position detection device 20 of the first embodiment, The physical size of each of the magnets 60A, 60B can be reduced. Therefore, the size of the position detection device 20 can be reduced.

In this embodiment, the magnets 60A, 60B are arranged so that the magnetic fluxes generated by the magnets 60A, 60B are directed toward the clutch-constituting portions 11, 12 side. Therefore, it is possible to increase the change in the direction of the magnetic flux detected by the magnetic detection element 80 when the positional relationship in the rotational direction of the clutch forming portions 11 and 12 changes.

Between the magnetic flux path portions 73 and 74 of this embodiment, a dead zone is formed in which the direction of the magnetic flux does not change even if the positional relationship of the clutch forming portion 12 with respect to the clutch forming portion 11 changes in the rotational direction. Therefore, in this embodiment, the detection portion of the magnetic detection element 80 is arranged closer to the clutch forming portions 11 and 12 than the dead zone.

(Tenth embodiment)
In the ninth embodiment, the N poles of the magnets 60A and 60B are directed radially inward about the axis S, and the S poles of the magnets 60A and 60B are directed radially outward about the axis S. An example of placement has been described.

However, instead of this, the south poles of the magnets 60A and 60B are directed radially inward about the axis S, and the north poles of the magnets 60A and 60B are directed radially outward about the axis S. The tenth embodiment will be described with reference to FIG.

The present embodiment and the ninth embodiment are different only in the arrangement of the magnetic poles of the magnets 60A and 60B of the yoke 70 of the position detection device 20, and the other configurations are common. Therefore, the magnets 60A and 60B of this embodiment will be described.

The magnets 60A and 60B are arranged so that their surfaces 61 face radially inward about the axis S. As shown in FIG. Therefore, the magnets 60A and 60B are arranged so that their south poles face radially inward about the axis S. As shown in FIG.

The magnets 60A and 60B are arranged so that their surfaces 62 face outward in the radial direction about the axis S. As shown in FIG. Therefore, the magnets 60A and 60B are arranged so that their respective north poles are directed outward in the radial direction about the axis S. As shown in FIG.

The magnets 60A and 60B of the present embodiment constitute a magnetic field generating section together with the magnetic flux path section 75 of the yoke 70. FIG. The surface 61 of the magnet 60A constitutes the first magnetic pole portion and the surface 62 of the magnet 60A constitutes the third magnetic pole portion. The surface 61 of the magnet 60B constitutes the second magnetic pole portion, and the surface 62 of the magnet 60B constitutes the fourth magnetic pole portion.

Each face 61 of magnets 60A, 60B has the same polarity. Each face 62 of magnets 60A, 60B has the same polarity.

In the present embodiment configured as described above, the magnetic detection element 80 outputs sensor signals indicating the positional relationship in the rotational direction of the clutch components 11 and 12 as shown in (i), (j), (k), and (l) below. is output to the control device 50 .

(i) In a state in which the end face 74a of the yoke 70 faces one hole 12b out of the plurality of holes 12b and the end face 73a of the yoke 70 faces one hole 11b out of the plurality of holes 11b, The magnetic circuit operates as in FIG.

In this case, the magnetic detection element 80 faces the one hole 11b and the one hole 12b.

At this time, the magnetic flux generated from the N pole of the magnet 60A is released from the magnetic flux path portion 75 to the outside. The emitted magnetic flux goes to the north pole of the magnet 60A through the outside of the magnetic flux path portion 74, the one hole portion 12b, the end surface 74a, the magnetic flux path portion 74, and the south pole of the magnet 60A.

On the other hand, the magnetic flux generated from the N pole of the magnet 60B is emitted from the magnetic flux path portion 75 to the outside. The emitted magnetic flux goes to the north pole of the magnet 60B through the outside of the magnetic flux path portion 73, the one hole portion 11b, the end surface 73a, the magnetic flux path portion 73, and the south pole of the magnet 60B.

In addition, the magnetic flux from the one hole 11b and the magnetic flux from the one hole 12b pass through the magnetic detection element 80 . Therefore, a combined magnetic flux, which is a combination of the magnetic flux from the one hole 11b and the magnetic flux from the one hole 12b, passes through the detection portion of the magnetic detection element 80. FIG.
The magnetic flux passing through the detection portion of the magnetic detection element 80 is directed radially outward from the axis S as indicated by the arrow G in FIG. Therefore, the magnetic detection element 80 outputs a sensor signal having a signal level Sg indicating the direction of the magnetic flux detected by the detection section.

(j) When the end surface 74a of the yoke 70 faces one hole 12b out of the plurality of holes 12b and the end face 73a of the yoke 70 faces one tooth 11a out of the plurality of teeth 11a, The magnetic circuit operates as in FIG.

In this case, the magnetic detection element 80 faces one tooth portion 11a and one hole portion 12b.

At this time, the magnetic flux generated from the N pole of the magnet 60A is released from the magnetic flux path portion 75 to the outside. The emitted magnetic flux goes to the north pole of the magnet 60A through the outside of the magnetic flux path portion 74, the one hole portion 12b, the end surface 74a, the magnetic flux path portion 74, and the south pole of the magnet 60A.

On the other hand, the magnetic flux generated from the N pole of the magnet 60B is emitted from the magnetic flux path portion 75 to the outside. The emitted magnetic flux goes to the north pole of the magnet 60B through the outside of the magnetic flux path portion 73, the one tooth portion 11a, the end face 73a, the magnetic flux path portion 73, and the south pole of the magnet 60B.

In addition, the magnetic flux from the one tooth portion 11 a and the magnetic flux from the one hole portion 12 b pass through the magnetic detection element 80 . Therefore, a combined magnetic flux, which is a combination of the magnetic flux from the one tooth portion 11 a and the magnetic flux from the one hole portion 12 b , passes through the detection portion of the magnetic detection element 80 .

Therefore, the direction of the magnetic flux passing through the detection portion of the magnetic detection element 80 is tilted from the arrow G toward the other side in the axial direction as shown by the arrow H in FIG. 27 due to the influence of the one tooth portion 11a. Therefore, the magnetic detection element 80 outputs a sensor signal having a signal level Sh indicating the direction of the magnetic flux detected by the detection section.

(k) In a state in which the end face 74a of the yoke 70 faces one tooth 12a out of the plurality of teeth 12a and the end face 73a of the yoke 70 faces one hole 11b out of the plurality of holes 11b, The magnetic circuit operates as in FIG.

At this time, the magnetic detection element 80 faces the one hole portion 11b and the one tooth portion 12a.

At this time, the magnetic flux generated from the N pole of the magnet 60A is released from the magnetic flux path portion 75 to the outside. The emitted magnetic flux goes to the north pole of the magnet 60A through the outside of the magnetic flux path portion 74, the one tooth portion 12a, the end face 74a, the magnetic flux path portion 74, and the south pole of the magnet 60A.

On the other hand, the magnetic flux generated from the N pole of the magnet 60B is emitted from the magnetic flux path portion 75 to the outside. The emitted magnetic flux goes to the north pole of the magnet 60B through the outside of the magnetic flux path portion 73, the one hole portion 11b, the end surface 73a, the magnetic flux path portion 73, and the south pole of the magnet 60B.

In addition, the magnetic flux from the one tooth portion 12 a and the magnetic flux from the one hole portion 11 b pass through the magnetic detection element 80 . Therefore, a combined magnetic flux, which is a combination of the magnetic flux from the one tooth portion 12a and the magnetic flux from the one hole portion 11b, passes through the magnetic detecting element 80. FIG.
The direction of the magnetic flux passing through the magnetic detecting element 80 is inclined to one side in the axial direction from the arrow G as indicated by the arrow I in FIG. 28 due to the influence of the one tooth portion 12a. Therefore, the magnetic detection element 80 outputs a sensor signal having a signal level Si indicating the direction of the magnetic flux detected by the detection section.

(l) When the end face 74a of the yoke 70 faces one tooth 12a out of the plurality of teeth 12a and the end face 73a of the yoke 70 faces one tooth 11a out of the teeth 11a, The magnetic circuit operates as in FIG.

At this time, the magnetic detection element 80 faces the one tooth portion 11a and the one tooth portion 12a.

At this time, the magnetic flux generated from the N pole of the magnet 60A is released from the magnetic flux path portion 75 to the outside. The emitted magnetic flux goes to the north pole of the magnet 60A through the outside of the magnetic flux path portion 74, the one tooth portion 12a, the end face 74a, the magnetic flux path portion 74, and the south pole of the magnet 60A.
On the other hand, the magnetic flux generated from the N pole of the magnet 60B is emitted from the magnetic flux path portion 75 to the outside. The emitted magnetic flux goes to the north pole of the magnet 60B through the outside of the magnetic flux path portion 73, the one tooth portion 11a, the end face 73a, the magnetic flux path portion 73, and the south pole of the magnet 60B.

In addition, the magnetic flux from the one tooth portion 11 a and the magnetic flux from the one tooth portion 12 a pass through the magnetic detection element 80 . Therefore, a combined magnetic flux, which is obtained by synthesizing the magnetic flux from the one tooth portion 11a and the magnetic flux from the one tooth portion 12a, passes through the detection portion of the magnetic detection element 80. FIG.

The direction of the magnetic flux passing through the detection portion of the magnetic detection element 80 is radially outward with respect to the axis S as indicated by arrow G. As shown in FIG. Therefore, the magnetic detection element 80 outputs a sensor signal having a signal level Sg indicating the direction of the magnetic flux detected by the detection section.

In this embodiment described above, the signal level Sg, the signal level Sh, and the signal level Si are set to different values. Therefore, the magnetic detection element 80 outputs the sensor signal at the signal level or the sensor signal at the signal level Si to the controller 50 .

Then, the controller 50 controls the plurality of teeth 11a to face any one of the plurality of holes 12b, and the plurality of teeth 12a to face any one of the plurality of holes 11b. It is determined to be in a state facing the portion 11b.

As described above, it is possible to provide the position detection device 20 that detects the positional relationship in the rotational direction between the clutch components 11 and 12 .

In this embodiment, as in the ninth embodiment, the direction of the magnetic flux between the magnetic flux path portions 73 and 74 changes even if the positional relationship in the rotational direction of the clutch forming portions 11 and 12 changes. a dead zone is formed. Therefore, in this embodiment, the detection portion of the magnetic detection element 80 is arranged closer to the clutch forming portions 11 and 12 than the dead zone.

(Eleventh embodiment)
In the eleventh embodiment, an example in which a gap 75d is provided in the magnetic flux path portion 75 in the yoke 70 of the position detection device 20 of the ninth embodiment will be described with reference to FIG.

The present embodiment and the ninth embodiment differ only in the magnetic flux path portion 75, and the other configurations are common.

The magnetic flux path portion 75 of this embodiment is configured by axial paths 75e and 75f and projecting portions 75b and 75c. The axial paths 75e and 75f are arranged in the axial direction with a gap 75d interposed therebetween. The axial path 75e is formed along the axial direction between the center line h between the magnets 60A and 60B and the surface 61 of the magnet 60A. The axial path 75f is formed along the axial direction between the center line h between the magnets 60A and 60B and the surface 61 of the magnet 60B.

The protruding portion 75b protrudes toward the surface 62 of the magnet 60A from one axial end of the axial path 75e. The protruding portion 75c protrudes toward the surface 62 of the magnet 60B from the other axial end of the axial path 75f.

The axial path 75e and the protruding portion 75b form a magnetic flux path through which magnetic flux from the center line h side toward the surface 61 of the magnet 60A is passed. The axis line path 75f and the projecting portion 75c constitute a magnetic flux path through which the magnetic flux from the center line h side toward the surface 61 of the magnet 60B is passed.

According to the present embodiment described above, the magnetism detecting element 80 rotates the clutch components 11 and 12 in the rotational direction as shown in (e), (f), (g), and (h), as in the ninth embodiment. A sensor signal indicating the positional relationship is output to the control device 50 . Accordingly, the position detection device 20 that detects the positional relationship between the clutch components 11 and 12 can be provided.

In this embodiment, although the gap 75d is provided in the magnetic flux path portion 75, since the magnetic flux does not pass through the center line h of the magnetic flux path portion 75, the detection of the magnetic flux direction in the magnetic detection element 80 is not affected. is less.

(12th embodiment)
In the twelfth embodiment, an example in which a gap 75d is provided in the magnetic flux path portion 75 in the yoke 70 of the position detection device 20 of the tenth embodiment will be described with reference to FIG.

The present embodiment and the tenth embodiment are different only in the magnetic flux path portion 75, and have other configurations in common.

As in the eleventh embodiment, the magnetic flux path portion 75 of the present embodiment is composed of axial paths 75e and 75f and projecting portions 75b and 75c.

The axial paths 75e and 75f are arranged in the axial direction with a gap 75d interposed therebetween. The axial path 75e is formed along the axial direction between the center line h between the magnets 60A and 60B and the surface 62 of the magnet 60A. The axial path 75f is formed along the axial direction between the center line h between the magnets 60A and 60B and the surface 61 of the magnet 60B.

The protruding portion 75b protrudes toward the surface 62 of the magnet 60A from one axial end of the axial path 75e. The protruding portion 75c protrudes toward the surface 62 of the magnet 60B from the other axial end of the axial path 75f.

The axial path 75e and the protruding portion 75b form a magnetic flux path through which the magnetic flux from the surface 62 of the magnet 60A toward the center line h passes. The axial path 75f and the protruding portion 75c constitute a magnetic flux path through which the magnetic flux from the surface 61 of the magnet 60B toward the center line h passes.

According to the present embodiment described above, the magnetism detecting element 80 rotates the clutch components 11 and 12 in the rotational direction as shown in (i), (j), (k), and (l), as in the tenth embodiment. A sensor signal indicating the positional relationship is output to the control device 50 . Accordingly, it is possible to provide the position detection device 20 that detects the positional relationship between the teeth 11 a and holes 11 b of the clutch-forming portion 11 and the teeth 12 a and holes 12 b of the clutch-forming portion 12 .

In this embodiment, although the gap 75d is provided in the magnetic flux path portion 75, since the magnetic flux does not pass through the center line h of the magnetic flux path portion 75, the detection of the magnetic flux direction in the magnetic detection element 80 is not affected. is less.
(13th embodiment)
In the fourth embodiment, the magnetic flux path portions 73 and 74 are provided with the opposing surfaces 73b and 74b, and the surface 62 of the magnet 60A and the surface 61 of the magnet 60B are directed radially inward about the axis S. An example of placement has been described.

Instead of this, opposing surfaces 73b and 74b are provided in the magnetic flux path portions 73 and 74, and the surface 62 of the magnet 60A and the surface 62 of the magnet 60B are arranged facing radially inward about the axis S. The thirteenth embodiment will be described with reference to FIG.

This embodiment and the fourth embodiment are the same except for the orientation of the surfaces 62 and 61 of the magnets 60A and 60B. Therefore, the directions of the surfaces 62 and 61 of the magnets 60A and 60B in this embodiment will be described below.

In this embodiment, similarly to the ninth embodiment, the surface 62 of the magnet 60A and the surface 62 of the magnet 60B are arranged radially inward with respect to the axis S as the center. A surface 61 of the magnet 60A and a surface 61 of the magnet 60B are arranged facing outward in a radial direction about the axis S, respectively.

As a result, the north poles of the magnets 60A and 60B are arranged radially inward about the axis S, and the south poles of the magnets 60A and 60B are radially outward about the axis S. It is placed facing

According to this embodiment configured as described above, the magnetic detection element 80 is provided in the clutch components 11 and 12 as shown in (e), (f), (g), and (h), as in the ninth embodiment. A sensor signal indicating the positional relationship in the rotational direction is output to the control device 50 . This makes it possible to provide the position detection device 20 that detects the positional relationship between the clutch components 11 and 12 .

In this embodiment, the magnetic flux path portion 74 is provided with a facing surface 74b. Thereby, the magnetic flux from the N pole of the magnet 60A can be guided toward the magnetic detection element 80. FIG. In addition to this, the magnetic flux path portion 73 is provided with a facing surface 73b. This guides the magnetic flux from the N pole of the magnet 60B toward the magnetic detection element 80. As shown in FIG.

As described above, when the positional relationship in the rotational direction of the clutch forming portions 11 and 12 is (e) and (h), the direction of the magnetic flux detected by the magnetic detection element 80 is changed in the radial direction about the axis S (for example, (longitudinal direction of paper) can be approached with high accuracy. The magnetic flux detected by the magnetic detection element 80 is a composite magnetic flux obtained by synthesizing the magnetic flux from the magnetic flux path portion 73 and the magnetic flux from the magnetic flux path portion 74 .

Therefore, the direction of the magnetic flux detected by the magnetic detection element 80 when the positional relationship in the rotational direction of the clutch components 11 and 12 is (e) and (h) is determined by the magnetic flux detection of the Y-axis Hall element of the magnetic detection element 80. In the direction, the accuracy is approached.

Therefore, in the cases of (e) and (h), the magnetic flux passing through the magnetic detection element 80 in the magnetic flux detection direction of the Y-axis Hall element can be increased compared to the ninth embodiment. Therefore, in the case of (f), the direction of the magnetic flux detected by the magnetic detection element 80 can be greatly influenced by the tooth portion 12a. In the case of (g), the direction of the magnetic flux detected by the magnetic detection element 80 can be greatly influenced by the tooth portion 11a.
As a result, if the direction of magnetic flux detection by the Y-axis Hall element is used as a reference in detecting the direction of the magnetic flux by the magnetic detection element 80, the change in the positional relationship between the clutch components 11 and 12 is greater than in the ninth embodiment. As a result, the change in the direction of the magnetic flux detected by the magnetic detection element 80 can be increased.

As described above, the robustness of the magnetic detection element 80 and thus the position detection device 20 can be improved.
(14th embodiment)
In the fifth embodiment, the magnetic flux path portions 73 and 74 are provided with the facing surfaces 73b and 74b, and the surface 62 of the magnet 60A and the surface 61 of the magnet 60B are directed radially inward about the axis S. An example of placement has been described.

Instead of this, opposing surfaces 73b and 74b are provided in the magnetic flux path portions 73 and 74, and the surface 62 of the magnet 60A and the surface 62 of the magnet 60B are arranged facing radially inward about the axis S. The fourteenth embodiment will be described with reference to FIG.

In the present embodiment, the surface 61 of the magnet 60A and the surface 61 of the magnet 60B are arranged facing outward in the radial direction about the axis S, respectively.

As a result, the north poles of the magnets 60A and 60B are arranged radially inward about the axis S. As shown in FIG. The south poles of the magnets 60A and 60B are arranged facing radially outward from the axis S as the center.

As shown in FIG. 33, this embodiment and the fifth embodiment differ only in the orientation of the surfaces 62 and 61 of the magnets 60A and 60B, and the other configurations are common.
(15th embodiment)
In the seventh embodiment described above, the magnetic flux path portions 73 and 74 are curved, and the surface 62 of the magnet 60A and the surface 61 of the magnet 60B are arranged radially inward about the axis S. explained.

Instead of this, the magnetic flux path portions 73 and 74 are formed in a curved shape, and the surface 62 of the magnet 60A and the surface 62 of the magnet 60B are arranged facing radially inward about the axis S. An embodiment will be described with reference to FIG.

This embodiment and the seventh embodiment are the same except for the orientation of the surfaces 62 and 61 of the magnets 60A and 60B. Therefore, the directions of the surfaces 62 and 61 of the magnets 60A and 60B in this embodiment will be described below.

In this embodiment, similarly to the ninth embodiment, the surface 62 of the magnet 60A and the surface 62 of the magnet 60B are arranged radially inward with respect to the axis S as the center. A surface 61 of the magnet 60A and a surface 61 of the magnet 60B are arranged facing outward in a radial direction about the axis S, respectively.

As a result, the north poles of the magnets 60A and 60B are arranged radially inward about the axis S, and the south poles of the magnets 60A and 60B are radially outward about the axis S. It is placed facing

According to this embodiment configured as described above, the magnetic detection element 80 is provided in the clutch components 11 and 12 as shown in (e), (f), (g), and (h), as in the ninth embodiment. A sensor signal indicating the positional relationship in the rotational direction is output to the control device 50 . This makes it possible to provide the position detection device 20 that detects the positional relationship between the clutch components 11 and 12 .

In this embodiment, the outer peripheral portion 78a is a first side surface that is arranged on one side in the axial direction of the magnetic flux path portion 74 and extends radially outward from the end surface 74a about the axis. The inner peripheral portion 78b is a second side surface that is arranged on the other side in the axial direction of the magnetic flux path portion 74 and extends radially outward from the end surface 74a about the axis.

Here, the outer peripheral portion 78a is formed in a curved shape so that the distance between the outer peripheral portion 78a and the inner peripheral portion 78b becomes smaller as the magnetic detecting element 80 is approached in the radial direction about the axis S. Therefore, the magnetic flux from the N pole of the magnet 60A can be guided to the magnetic detection element 80 and the end surface 74a.

In this embodiment, the inner peripheral portion 79b is a third side surface that is arranged on one side in the axial direction of the magnetic flux path portion 73 and extends radially outward from the end surface 73a centering on the axial line. The outer peripheral portion 79a is a fourth side surface that is arranged on the other side in the axial direction of the magnetic flux path portion 74 and extends radially outward from the end surface 73a about the axis.

Here, the outer peripheral portion 79a is curved so that the distance between the outer peripheral portion 79a and the inner peripheral portion 79b becomes smaller as the magnetic detecting element 80 is approached in the radial direction about the axis S. Therefore, the magnetic flux from the N pole of the magnet 60B can be guided to the magnetic detection element 80 and the end surface 73a.

As described above, according to the present embodiment, compared to the case where the outer peripheral portions 78a and 79a are formed parallel to the radial direction about the axis S, the magnetic flux density passing between the magnet 60A and the magnetic detection element 80 and the magnet 60B and the magnetic flux density passing between the magnetic sensing element 80 can be increased. Therefore, the direction of the magnetic flux can be detected by the magnetic detection element 80 satisfactorily. As a result, the robustness of the magnetic detection element 80 and thus the position detection device 20 can be improved.
(16th embodiment)
In the eighth embodiment, the magnetic detection element 80 protrudes radially inward about the axis S from the end surfaces 73a and 74a, and the surface 62 of the magnet 60A and the surface 61 of the magnet 60B are centered about the axis S, respectively. An example of arranging toward the inner side in the radial direction has been described.

Instead of this, the magnetic detection element 80 projects radially inward about the axis S from the end surfaces 73a and 74a, and the surfaces 62 of the magnets 60A and 60B are arranged radially inward. Sixteen embodiments will be described with reference to FIG.

This embodiment and the above-described eighth embodiment differ only in the orientation of the surfaces 62 and 61 of the magnets 60A and 60B, and the other configurations are common. Therefore, the directions of the surfaces 62 and 61 of the magnets 60A and 60B in this embodiment will be described below.

In this embodiment, similarly to the ninth embodiment, the surface 62 of the magnet 60A and the surface 62 of the magnet 60B are arranged radially inward with respect to the axis S as the center. A surface 61 of the magnet 60A and a surface 61 of the magnet 60B are arranged facing outward in a radial direction about the axis S, respectively.

As a result, the north poles of the magnets 60A and 60B are arranged radially inward about the axis S, and the south poles of the magnets 60A and 60B are radially outward about the axis S. It is placed facing

According to this embodiment configured as described above, the magnetic detection element 80 is provided in the clutch components 11 and 12 as shown in (e), (f), (g), and (h), as in the ninth embodiment. A sensor signal indicating the positional relationship in the rotational direction is output to the control device 50 . This makes it possible to provide the position detection device 20 that detects the positional relationship between the clutch components 11 and 12 .

In this embodiment, the magnetic detection element 80 can be brought closer to the clutch forming portions 11 and 12 than in the ninth embodiment, so that the magnetic detection element 80 can be arranged at a portion where the magnetic flux changes greatly. . Therefore, the change in the direction of the magnetic flux passing through the magnetic detection element 80 caused by the change in the positional relationship between the clutch components 11 and 12 increases. As a result, the robustness of the magnetic detection element 80 and thus the position detection device 20 can be improved.
(17th embodiment)
In the thirteenth embodiment, the opposing surfaces 73b and 74b are provided in the magnetic flux path portions 73 and 74, and the surface 62 of the magnet 60A and the surface 62 of the magnet 60B are directed radially inward about the axis S. An example of placement has been described.

Instead of this, opposing surfaces 73b and 74b are provided in the magnetic flux path portions 73 and 74, and the surface 61 of the magnet 60A and the surface 61 of the magnet 60B are arranged facing radially inward about the axis S. The seventeenth embodiment will be described with reference to FIG.

This embodiment and the thirteenth embodiment are the same except for the orientation of the surfaces 62 and 61 of the magnets 60A and 60B. Therefore, the directions of the surfaces 62 and 61 of the magnets 60A and 60B in this embodiment will be described below.

In the present embodiment, the surface 61 of the magnet 60A and the surface 61 of the magnet 60B are arranged radially inward about the axis S as in the tenth embodiment. A surface 62 of the magnet 60A and a surface 62 of the magnet 60B are arranged facing radially outward about the axis S, respectively.

As a result, the south poles of the magnets 60A and 60B are arranged radially inward about the axis S, and the north poles of the magnets 60A and 60B are radially outward about the axis S. It is placed facing

According to this embodiment configured as described above, the magnetic detection element 80 is provided in the clutch constituting portions 11 and 12 as in (i), (j), (k), and (l), as in the tenth embodiment. A sensor signal indicating the positional relationship in the rotational direction is output to the control device 50 . This makes it possible to provide the position detection device 20 that detects the positional relationship between the clutch components 11 and 12 .

In this embodiment, as described above, the magnetic flux path portion 74 is provided with the facing surface 74b. Thereby, the magnetic flux from the magnetic detection element 80 can be guided toward the surface 61 of the magnet 60A. In addition to this, the magnetic flux path portion 73 is provided with a facing surface 73b. Thereby, the magnetic flux from the magnetic detection element 80 can be guided toward the surface 61 of the magnet 60B.

As described above, when the positional relationship in the rotational direction of the clutch forming portions 11 and 12 is (i) and (l), the direction of the magnetic flux detected by the magnetic detection element 80 is set in the radial direction about the axis S (for example, (longitudinal direction of paper) can be approached with high accuracy.

Therefore, the direction of the magnetic flux detected by the magnetic detection element 80 when the positional relationship in the rotational direction of the clutch components 11 and 12 is (i) and (l) is determined by the magnetic flux detection of the Y-axis Hall element of the magnetic detection element 80. In the direction, the accuracy is approached.

Therefore, in the cases (i) and (l), the magnetic flux passing through the magnetic detecting element 80 in the magnetic flux detecting direction of the Y-axis Hall element can be increased compared to the tenth embodiment. Therefore, in the case of (j), the direction of the magnetic flux detected by the magnetic detection element 80 can be greatly influenced by the tooth portion 11a. In the case of (k), the direction of the magnetic flux detected by the magnetic detection element 80 can be greatly influenced by the tooth portion 12a.

As a result, if the direction of magnetic flux detection by the Y-axis Hall element is used as a reference in detecting the direction of the magnetic flux by the magnetic detection element 80, the change in the positional relationship between the clutch components 11 and 12 is greater than in the tenth embodiment. As a result, the change in the direction of the magnetic flux detected by the magnetic detection element 80 can be increased.

As described above, the robustness of the magnetic detection element 80 and thus the position detection device 20 can be improved.

(18th embodiment)
In the fourteenth embodiment, the magnetic flux path portions 73 and 74 are provided with the facing surfaces 73b and 74b, and the surface 62 of the magnet 60A and the surface 62 of the magnet 60B are directed radially inward about the axis S. An example of placement has been described.

Instead of this, opposing surfaces 73b and 74b are provided in the magnetic flux path portions 73 and 74, and the surface 61 of the magnet 60A and the surface 61 of the magnet 60B are arranged facing radially inward about the axis S. The eighteenth embodiment will be described with reference to FIG.

In this embodiment, the surface 62 of the magnet 60A and the surface 62 of the magnet 60B are arranged facing outward in the radial direction centering on the axis S, respectively.

As a result, the north poles of the magnets 60A and 60B are arranged radially inward about the axis S. As shown in FIG. The south poles of the magnets 60A and 60B are arranged facing radially outward from the axis S as the center.

As shown in FIG. 37, this embodiment and the fifth embodiment differ only in the orientation of the surfaces 62 and 61 of the magnets 60A and 60B, and the other configurations are common.

(19th embodiment)
In the fifteenth embodiment, the magnetic flux path portions 73 and 74 are formed in a curved shape, and the surface 62 of the magnet 60A and the surface 62 of the magnet 60B are arranged radially inward about the axis S. explained.

Instead of this, the magnetic flux path portions 73 and 74 are formed in a curved shape, and the surface 61 of the magnet 60A and the surface 61 of the magnet 60B are arranged facing radially inward about the axis S. An embodiment will be described with reference to FIG.

This embodiment and the fifteenth embodiment are the same except for the orientation of the surfaces 62 and 61 of the magnets 60A and 60B. Therefore, the directions of the surfaces 62 and 61 of the magnets 60A and 60B in this embodiment will be described below.

In the present embodiment, the surface 61 of the magnet 60A and the surface 61 of the magnet 60B are arranged radially inward about the axis S as in the tenth embodiment. A surface 62 of the magnet 60A and a surface 62 of the magnet 60B are arranged facing radially outward about the axis S, respectively.

As a result, the south poles of the magnets 60A and 60B are arranged radially inward about the axis S, and the north poles of the magnets 60A and 60B are radially outward about the axis S. It is placed facing

According to this embodiment configured as described above, the magnetic detection element 80 is provided in the clutch constituting portions 11 and 12 as in (i), (j), (k), and (l), as in the tenth embodiment. A sensor signal indicating the positional relationship in the rotational direction is output to the control device 50 . This makes it possible to provide the position detection device 20 that detects the positional relationship between the clutch components 11 and 12 .

In the present embodiment, as in the fifteenth embodiment, the outer peripheral portion 78a is arranged so that the distance between the outer peripheral portion 78a and the inner peripheral portion 78b becomes smaller as the magnetic detecting element 80 is approached in the radial direction about the axis S. is curved. Therefore, the magnetic flux from the magnetic detection element 80 and the end surface 74a can be guided to the S pole of the magnet 60A.

In the present embodiment, as in the fifteenth embodiment, the outer peripheral portion 79a is arranged so that the distance between the outer peripheral portion 79a and the inner peripheral portion 79b becomes smaller as the magnetic detecting element 80 is approached in the radial direction about the axis S. is curved. Therefore, the magnetic flux from the magnetic detection element 80 and the end surface 74a can be guided to the S pole of the magnet 60B.

As described above, according to the present embodiment, compared to the case where the outer peripheral portions 78a and 79a are formed parallel to the radial direction about the axis S, the magnetic flux density passing between the magnet 60A and the magnetic detection element 80 and the magnet 60B and the magnetic flux density passing between the magnetic sensing element 80 can be increased. Therefore, the direction of the magnetic flux can be detected by the magnetic detection element 80 satisfactorily. As a result, the robustness of the magnetic detection element 80 and thus the position detection device 20 can be improved.

(Twentieth embodiment)
In the sixteenth embodiment, the magnetic detection element 80 protrudes radially inward about the axis S from the end surfaces 73a and 74a, and the surface 62 of the magnet 60A and the surface 62 of the magnet 60B are centered about the axis S, respectively. An example of arranging toward the inner side in the radial direction has been described.

Instead of this, the magnetic detection element 80 projects radially inward about the axis S from the end surfaces 73a and 74a, and the surfaces 61 of the magnets 60A and 60B are directed radially inward. Twenty embodiments will be described with reference to FIG.

This embodiment and the sixteenth embodiment are the same except for the orientation of the surfaces 62 and 61 of the magnets 60A and 60B. Therefore, the directions of the surfaces 62 and 61 of the magnets 60A and 60B in this embodiment will be described below.

In the present embodiment, the surface 61 of the magnet 60A and the surface 61 of the magnet 60B are arranged radially inward about the axis S as in the tenth embodiment. A surface 62 of the magnet 60A and a surface 62 of the magnet 60B are arranged facing radially outward about the axis S, respectively.

As a result, the south poles of the magnets 60A and 60B are arranged radially inward about the axis S, and the north poles of the magnets 60A and 60B are radially outward about the axis S. It is placed facing

According to this embodiment configured as described above, the magnetic detection element 80 is provided in the clutch constituting portions 11 and 12 as in (i), (j), (k), and (l), as in the tenth embodiment. A sensor signal indicating the positional relationship in the rotational direction is output to the control device 50 . This makes it possible to provide the position detection device 20 that detects the positional relationship between the clutch components 11 and 12 .

In the present embodiment, the magnetic detection element 80 can be brought closer to the clutch-constituting portions 11 and 12 than in the second embodiment, so the magnetic detection element 80 can be arranged in a portion where the magnetic flux changes greatly. . Therefore, the change in the direction of the magnetic flux passing through the magnetic detection element 80 caused by the change in the positional relationship between the clutch components 11 and 12 increases. As a result, the robustness of the magnetic detection element 80 and thus the position detection device 20 can be improved.
(21st embodiment)
In the above-described fourth embodiment, an example in which the facing surface 73b of the magnetic flux path portion 73 is formed so as to move from one side to the other side in the axial direction as it approaches from the outside to the inside in the radial direction centering on the axis S has been described.

Instead, in the 21st embodiment, the facing surface 73b of the magnetic flux path portion 73 is directed from one side in the axial direction to the other side in the axial direction as it approaches from the radially inner side to the radially outer side about the axis S. An example formed in this manner will be described with reference to FIG.

The facing surface 74b of the magnetic flux path portion 74 is formed so as to move from the other side in the axial direction toward the one side in the axial direction as it approaches the radially outer side from the radially inner side about the axis S.

This embodiment and the above-described fourth embodiment are the same except for the inclination directions of the facing surfaces 73b and 74b.

According to the present embodiment described above, the magnetic detection element 80 outputs to the control device 50 a sensor signal indicating the positional relationship in the rotational direction between the clutch components 11 and 12, as in the fourth embodiment. As described above, it is possible to provide the position detection device 20 that detects the positional relationship of the clutch components 11 and 12 in the rotational direction.

In this embodiment, as in the fourth embodiment, it is possible to generate a magnetic flux that passes through the opposing surface 73b from the opposing surface 74b through the magnetic detecting element 80. FIG. Therefore, as in the fourth embodiment, the direction of the magnetic flux passing through the detection portion of the magnetic detection element 80 is brought close to the magnetic flux detection direction of the X-axis Hall element of the magnetic detection element 80 with high accuracy.

This makes it possible to increase the change in the direction of the magnetic flux detected by the magnetic detection element 80, as in the fourth embodiment. As described above, the robustness of the magnetic detection element 80 and thus the position detection device 20 can be improved.

(22nd embodiment)
In the twenty-first embodiment, the magnetic flux path portions 73 and 74 are provided with the opposing surfaces 73b and 74b, and the surface 62 of the magnet 60A and the surface 61 of the magnet 60B are arranged radially inward about the axis S. An example was explained.

Instead of this, the magnetic flux path portions 73 and 74 are provided with facing surfaces 73b and 74b, and the surface 62 of the magnet 60A and the surface 62 of the magnet 60B are arranged facing radially inward about the axis S. A twenty-second embodiment will be described with reference to FIG.

In this embodiment, as in the twenty-first embodiment, the facing surface 73b of the magnetic flux path portion 73 is shifted from one axial side to the other axial side as it approaches from the radially inner side to the radially outer side about the axis S. formed to face

As in the twenty-first embodiment, the facing surface 74b of the magnetic flux path portion 74 is formed so as to move from the other side in the axial direction toward the one side in the axial direction as it approaches from the radially inner side to the radially outer side about the axis S. It is

This embodiment and the twenty-first embodiment are the same except for the orientation of the surfaces 61 and 62 of the magnets 60A and 60B.

According to the present embodiment described above, the magnetic detection element 80 outputs to the control device 50 a sensor signal indicating the positional relationship in the rotational direction between the clutch components 11 and 12, as in the ninth embodiment. As described above, it is possible to provide the position detection device 20 that detects the positional relationship of the clutch components 11 and 12 in the rotational direction.

In this embodiment, the facing surface 74b can guide the magnetic flux from the N pole of the magnet 60A toward the magnetic detection element 80. FIG. The facing surface 73 b can guide the magnetic flux from the N pole of the magnet 60 B toward the magnetic detection element 80 . Therefore, as in the thirteenth embodiment, the direction of the magnetic flux passing through the detection portion of the magnetic detection element 80 can be brought close to the magnetic flux detection direction of the Y-axis Hall element of the magnetic detection element 80 with high accuracy.

Thus, similarly to the thirteenth embodiment, the change in the direction of the magnetic flux detected by the magnetic detection element 80 can be increased. As described above, the robustness of the magnetic detection element 80 and thus the position detection device 20 can be improved.

(23rd embodiment)
In the twenty-second embodiment, the magnetic flux path portions 73 and 74 are provided with the facing surfaces 73b and 74b, and the surface 62 of the magnet 60A and the surface 62 of the magnet 60B are arranged radially inward about the axis S. An example was explained.

Instead of this, the magnetic flux path portions 73 and 74 are provided with opposing surfaces 73b and 74b, and the surface 61 of the magnet 60A and the surface 61 of the magnet 60B are arranged facing radially inward about the axis S. A twenty-third embodiment will be described with reference to FIG.

In this embodiment, as in the twenty-second embodiment, the facing surface 73b of the magnetic flux path portion 73 moves from the one axial side to the other axial side as it approaches from the radially inner side to the radially outer side about the axis S. formed to face

As in the 22nd embodiment, the facing surface 74b of the magnetic flux path portion 74 is formed so as to move from the other side in the axial direction toward the one side in the axial direction as it approaches from the radially inner side to the radially outer side about the axis S. It is

This embodiment and the twenty-second embodiment are the same except that the orientations of the surfaces 61 and 62 of the magnets 60A and 60B are different.

According to the present embodiment described above, the magnetic detection element 80 outputs to the control device 50 a sensor signal indicating the positional relationship in the rotational direction between the clutch components 11 and 12, as in the tenth embodiment. As described above, it is possible to provide the position detection device 20 that detects the positional relationship of the clutch components 11 and 12 in the rotational direction.

In this embodiment, the facing surface 74b can guide the magnetic flux from the magnetic detection element 80 toward the S pole of the magnet 60A. The facing surface 73b can guide the magnetic flux from the magnetic detection element 80 toward the S pole of the magnet 60B. Therefore, as in the twenty-second embodiment, the direction of the magnetic flux passing through the detection portion of the magnetic detection element 80 is made to approach the magnetic flux detection direction of the Y-axis Hall element of the magnetic detection element 80 with high accuracy.

Therefore, in the cases (i) and (l), the magnetic flux passing through the magnetic detecting element 80 in the magnetic flux detecting direction of the Y-axis Hall element can be increased compared to the tenth embodiment. Therefore, in the case of (j), the direction of the magnetic flux detected by the magnetic detection element 80 can be greatly influenced by the tooth portion 11a. In the case of (k), the direction of the magnetic flux detected by the magnetic detection element 80 can be greatly influenced by the tooth portion 12a.

This makes it possible to increase the change in the direction of the magnetic flux detected by the magnetic detection element 80, as in the twenty-second embodiment. As described above, the robustness of the magnetic detection element 80 and thus the position detection device 20 can be improved.

(24th embodiment)
In the third embodiment, protrusions 73d and 74d are provided in the magnetic flux path portions 73 and 74, and the surface 62 of the magnet 60A and the surface 61 of the magnet 60B are arranged radially inward about the axis S. An example was described.

Instead of this, protrusions 73d and 74d are provided in the magnetic flux path portions 73 and 74, and the surface 62 of the magnet 60A and the surface 62 of the magnet 60B are arranged to face radially inward about the axis S, respectively. A twenty-fourth embodiment will be described with reference to FIG.

This embodiment and the above-described third embodiment differ only in the orientation of the surfaces 62 and 61 of the magnets 60A and 60B, and the other configurations are common. Therefore, the directions of the surfaces 62 and 61 of the magnets 60A and 60B in this embodiment will be described below.

In this embodiment, similarly to the ninth embodiment, the surface 62 of the magnet 60A and the surface 62 of the magnet 60B are arranged radially inward with respect to the axis S as the center. A surface 61 of the magnet 60A and a surface 61 of the magnet 60B are arranged facing outward in a radial direction about the axis S, respectively.

As a result, the north poles of the magnets 60A and 60B are arranged radially inward about the axis S, and the south poles of the magnets 60A and 60B are radially outward about the axis S. It is placed facing

According to this embodiment configured as described above, the magnetic detection element 80 is provided in the clutch components 11 and 12 as shown in (e), (f), (g), and (h), as in the ninth embodiment. A sensor signal indicating the positional relationship in the rotational direction is output to the control device 50 . This makes it possible to provide the position detection device 20 that detects the positional relationship between the clutch components 11 and 12 .

The magnetic flux path portions 73 and 74 of the yoke 70 of the position detecting device 20 of this embodiment are provided with the projecting portions 73d and 74d as described above. The protruding portion 74d is a first protruding portion that protrudes from the radially inner end of the magnetic flux radial path portion 74e about the axis S toward the magnetic detecting element 80. As shown in FIG. The protruding portion 73d is a second protruding portion that protrudes toward the magnetic detecting element 80 from the radially inner end of the magnetic flux radial path portion 73e about the axis S. As shown in FIG.

The magnetic detection element 80 is sandwiched between the protrusions 73d and 74d. The projecting portion 74 d guides the magnetic flux that has passed through the magnetic flux radial path portion 74 e to the magnetic detecting element 80 . The projecting portion 73 d guides the magnetic flux that has passed through the magnetic flux radial path portion 73 e to the magnetic detecting element 80 .

In this embodiment, as described above, the yoke 70 is provided with the protrusions 73d and 74d. Therefore, when the positional relationship in the rotational direction of the clutch forming portions 11 and 12 is (e) and (h), the direction of the magnetic flux passing through the detecting portion of the magnetic detecting element 80 is set in the radial direction (for example, the vertical direction of the paper surface). direction) can be approached with high accuracy.

Therefore, the direction of the magnetic flux detected by the magnetic detection element 80 when the positional relationship in the rotational direction of the clutch components 11 and 12 is (e) and (h) is determined by the magnetic flux detection of the Y-axis Hall element of the magnetic detection element 80. In the direction, the accuracy is approached.

As a result, if the direction of magnetic flux detection by the Y-axis Hall element is used as a reference in detecting the direction of the magnetic flux by the magnetic detection element 80, the change in the positional relationship between the clutch constituting portions 11 and 12 is similar to that of the thirteenth embodiment. As a result, the change in the direction of the magnetic flux detected by the magnetic detection element 80 can be increased.

In addition to this, in the present embodiment, the yoke 70 is provided with the projecting portions 73d and 74d as described above. Therefore, the magnetic flux density passing through the magnetic detecting element 80 between the magnetic flux path portions 74 and 73 can be increased.

As described above, the robustness of the magnetic detection element 80 and thus the position detection device 20 can be improved.

(25th embodiment)
In the twenty-fourth embodiment, the protrusions 73d and 74d are provided in the magnetic flux path portions 73 and 74, and the surface 62 of the magnet 60A and the surface 62 of the magnet 60B are arranged radially inward about the axis S. An example was described.

Instead of this, protrusions 73d and 74d are provided in the magnetic flux path portions 73 and 74, and the surface 61 of the magnet 60A and the surface 61 of the magnet 60B are arranged facing radially inward about the axis S, respectively. A twenty-fifth embodiment will be described with reference to FIG.

This embodiment and the twenty-fourth embodiment are the same except for the orientation of the surfaces 62 and 61 of the magnets 60A and 60B. Therefore, the directions of the surfaces 62 and 61 of the magnets 60A and 60B in this embodiment will be described below.

In the present embodiment, the surface 61 of the magnet 60A and the surface 61 of the magnet 60B are arranged radially inward about the axis S as in the tenth embodiment. A surface 62 of the magnet 60A and a surface 62 of the magnet 60B are arranged facing radially outward about the axis S, respectively.

As a result, the south poles of the magnets 60A and 60B are arranged radially inward about the axis S, and the north poles of the magnets 60A and 60B are radially outward about the axis S. It is placed facing

According to the present embodiment described above, the magnetism detecting element 80 rotates the clutch components 11 and 12 in the rotational direction as shown in (i), (j), (k), and (l), as in the tenth embodiment. A sensor signal indicating the positional relationship is output to the control device 50 . As described above, it is possible to provide the position detection device 20 that detects the positional relationship of the clutch components 11 and 12 in the rotational direction.

This makes it possible to provide the position detection device 20 that detects the positional relationship between the clutch components 11 and 12 .

In this embodiment, the projecting portion 74d guides the magnetic flux that has passed through the magnetic detection element 80 to the S pole of the magnet 60A. The protrusion 73d guides the magnetic flux passing through the magnetic detection element 80 to the S pole of the magnet 60B.

As described above, when the positional relationship in the rotational direction of the clutch forming portions 11 and 12 is (i) and (l), the direction of the magnetic flux detected by the magnetic detection element 80 is set in the radial direction about the axis S (for example, (longitudinal direction of paper) can be approached with high accuracy.

Therefore, the direction of the magnetic flux detected by the magnetic detection element 80 when the positional relationship in the rotational direction of the clutch components 11 and 12 is (i) and (l) is determined by the magnetic flux detection of the Y-axis Hall element of the magnetic detection element 80. In the direction, the accuracy is approached.

Therefore, in the cases (i) and (l), the magnetic flux passing through the magnetic detecting element 80 in the magnetic flux detecting direction of the Y-axis Hall element can be increased compared to the tenth embodiment. Therefore, in the case of (j), the direction of the magnetic flux detected by the magnetic detection element 80 can be greatly influenced by the tooth portion 11a. In the case of (k), the direction of the magnetic flux detected by the magnetic detection element 80 can be greatly influenced by the tooth portion 12a.

As a result, when the magnetic flux detection direction of the Y-axis Hall element is used as a reference for detecting the direction of the magnetic flux by the magnetic detection element 80, the magnetic flux detection element 80 detects the magnetic flux as the positional relationship between the clutch components 11 and 12 changes. The change in direction of the applied magnetic flux can be increased.
(26th embodiment)
In the ninth embodiment, the example in which the end face 74a and the end face 73a of the position detection device 20 are arranged in the axial direction has been described. However, instead of this, the twenty-sixth embodiment in which the end faces 74a and 73a of the position detection device 20 are arranged in the circumferential direction around the axis S will be described with reference to FIGS. do.

The power transmission system 1 of the present embodiment and the power transmission system 1 of the ninth embodiment differ only in the positional relationship of the position detection device 20 with respect to the dog clutch 10, and the configurations of the dog clutch 10 and the position detection device 20 are respectively different. are identical. Therefore, in the present embodiment, the positional relationship of the position detection device 20 with respect to the dog clutch 10 will be mainly described below.

As shown in FIGS. 45, 46 and 47, the magnetic flux path portion 73 of the position detection device 20 is arranged radially outward of the clearance 13 between the clutch forming portions 11 and 12 around the axis S. It has an end surface 73a forming a magnetic pole. The magnetic flux path portion 73 constitutes a first magnetic pole forming portion that generates a magnetic flux (that is, a magnetic field) that passes between the end surface 73 a and the clearance 13 .

The magnetic flux path portion 74 of the position detection device 20 has an end face 74a that is arranged radially outward about the axis S with respect to the clearance 13 between the clutch forming portions 11 and 12 and forms a magnetic pole. The magnetic flux path portion 74 constitutes a second magnetic pole forming portion that generates a magnetic flux (that is, a magnetic field) that passes between the end surface 74 a and the clearance 13 .

In this embodiment, the end surface 74a is arranged on one side in the circumferential direction about the axis S with respect to the end surface 73a. Specifically, the end face 74a and the end face 73a form magnetic poles of the same polarity. The end face 74a and the end face 73a each form an N-pole magnetic pole. That is, the end face 74a and the end face 73a form magnetic poles of the same polarity.

The magnetic detection element 80 is arranged between the magnetic flux path portion 73 and the magnetic flux path portion 74 of the position detection device 20 . The magnetic detection element 80 is arranged radially outward of the clearance 13 between the clutch forming portions 11 and 12 with the axis S as the center.

The magnetic detection element 80 includes a detection section 82 and a detection circuit. As shown in FIG. 47, the detection unit 82 detects the angle θ of the combined magnetic flux obtained by synthesizing the first magnetic flux passing between the end face 73a and the clearance 13 and the second magnetic flux passing between the end face 74a and the clearance 13. To detect.

Specifically, the detection unit 82 connects the Y-axis Hall element that detects the magnetic flux density in the radial direction centered on the axis S (for example, the vertical direction of the paper surface of FIG. 47) and the magnetic flux paths 74 and 73. and an X-axis Hall element for detecting a magnetic flux density (for example, in the horizontal direction of the paper surface of FIG. 47).

In this embodiment, X is the magnetic flux density detected by the X-axis Hall element, Y is the magnetic flux density detected by the Y-axis Hall element, and the angle θ obtained when Y/X=tan θ is detected by the detection unit 82. Let it be the direction of the passing magnetic flux.

A detection circuit of the magnetic detection element 80 outputs a sensor signal indicating the direction of the magnetic flux based on the detection value of the X-axis Hall element and the detection value of the Y-axis Hall element. The angle θ of the combined magnetic flux detected by the detector 82 is hereinafter referred to as the magnetic flux angle θ.

In the present embodiment, the detection portion 82 is arranged in an intermediate portion between the magnetic flux path portion 73 and the magnetic flux path portion 74 in the circumferential direction about the axis S. As shown in FIG.

Here, in FIG. 47 , an arrow Ye that passes through the detection portion 82 and points radially inward about the axis S is an arrow Ye, and an arrow that passes through the detection portion 82 and points in a circumferential direction about the axis S is an arrow Ye. An arrow pointing to one side is an arrow Yb. An arrow F indicates the direction of the magnetic flux detected by the detector 82 .

The center line T in FIGS. 47 and 49 to 52 passes through an intermediate portion between the magnetic flux path portion 73 and the magnetic flux path portion 74 in the circumferential direction centered on the axis S, and is a diameter centered on the axis S. It is a virtual line extending in the direction of

In FIG. 47, an arrow Ye indicates a radially inner side from the detecting portion 82 about the axis S. As shown in FIG. The arrow Ye indicates the reference direction indicating zero degree of the magnetic flux angle θ. The magnetic flux angle θ is the angle formed between the arrow Ye and the arrow F. As the arrow F indicating the direction of the magnetic flux rotates counterclockwise, the magnetic flux angle θ increases, and as the arrow F indicating the direction of the magnetic flux rotates clockwise, the magnetic flux angle θ decreases. A magnetic flux angle θ formed between the arrow F and the arrow Ye in FIG. 47 indicates a negative magnetic flux angle.

In this embodiment, the magnetic detection element 80 outputs a sensor signal indicating the magnetic flux angle θ detected by the detection section 82 (that is, the direction of the combined magnetic flux). As the magnetic flux angle θ increases, the sensor signal increases, and as the magnetic flux angle θ increases, the sensor signal decreases.

Next, FIG. 48 shows the relationship between the positional relationship between the tooth portions 11a and hole portions 11b of the clutch-constituting portion 11 and the tooth portions 12a and hole portions 12b of the clutch-constituting portion 12 and the sensor signal of the magnetic detection element 80 in this embodiment. 52 will be described.

In the present embodiment, the driving source 30 moves the clutch forming portions 11 and 12 along the axis S with the tooth portions 11 a and 12 a facing each other with the clearance 13 therebetween and the hole portions 11 b and 12 b facing each other with the clearance 13 therebetween. is rotated at a constant number of revolutions around

In this case, the sensor signal of the magnetic detection element 80 becomes a sine wave as shown in FIG. A plurality of dots in FIG. 48 indicate sample values of the sensor signal Ga of the magnetic detection element 80 at timings T1, T2, T3, and T4.

First, at timing T1, when the magnetic detection element 80 faces the pair of teeth 11a and 12a, as shown in FIG. , pointing radially inwards. Therefore, the sensor signal Ga of the magnetic detection element 80 becomes zero. The combined magnetic flux detected by the detection section 82 of the magnetic detection element 80 is hereinafter also referred to as the detected magnetic flux of the magnetic detection element 80 .

After that, the clutch forming portions 11 and 12 rotate to one side in the circumferential direction about the axis S, and the pair of tooth portions 11a and 12a rotate to one side in the circumferential direction. Then, the magnetic flux detected by the magnetic detection element 80 rotates clockwise so as to follow the pair of teeth 11a and 12a as indicated by arrow E in FIG. Accompanying this, the sensor signal Ga of the magnetic detection element 80 becomes smaller.

Arrow E in FIG. 50 indicates the direction of the magnetic flux detected by the magnetic detection element 80 when the magnetic detection element 80 faces the other circumferential end of the teeth 11a and 12a at the timing T2. there is

Next, as the clutch forming portions 11 and 12 rotate to one side in the circumferential direction about the axis S, the magnetic detection element 80 faces the pair of holes 11b and 12b. At this time, the detected magnetic flux of the magnetic detection element 80 is influenced by the pair of holes 11b and 12b, rotates counterclockwise, and directs radially inward as indicated by arrow D in FIG. Along with this, the sensor signal Ga of the magnetic detection element 80 increases.

Arrow D in FIG. 51 indicates the direction of the magnetic flux detected by the magnetic detection element 80 when the magnetic detection element 80 faces the holes 11b and 12b at timing T3.

Next, as the clutch forming portions 11 and 12 rotate to one side in the circumferential direction about the axis S, the next pair of tooth portions 11 a and 12 a approaches the magnetic detecting element 80 .

At this time, the detected magnetic flux of the magnetic detection element 80 is influenced by the next pair of teeth 11a and 12a and rotates counterclockwise as indicated by arrow R in FIG. Along with this, the sensor signal Ga of the magnetic detection element 80 increases.

The arrow R in FIG. 52 indicates the direction of the magnetic flux detected by the magnetic detection element 80 when the magnetic detection element 80 faces one end of the teeth 11a and 12a in the circumferential direction at timing T4. there is

Next, as the clutch forming portions 11 and 12 rotate in one direction in the circumferential direction about the axis S, the pair of tooth portions 11 a and 12 a approach the magnetic detecting element 80 . Accordingly, as shown in FIG. 49, the detected magnetic flux of the magnetic detection element 80 is influenced by the pair of teeth 11a and 12a, rotates clockwise, and is directed radially inward as indicated by arrow D. . Therefore, the sensor signal Ga of the magnetic detection element 80 becomes smaller.

49, 50, 51, and 52, as the clutch-constituting portions 11 and 12 rotate to one side in the circumferential direction about the axis S, the direction of the magnetic flux detected by the detecting portion 82 changes. change in order.

Thus, when the clutch forming portions 11 and 12 rotate about the axis S with the tooth portions 11a and 12a facing each other and the hole portions 11b and 12b facing each other, the magnetic flux angle of the detected magnetic flux of the magnetic detection element 80 is The sensor signal indicating θ becomes a sine wave with a large amplitude value as shown in FIG.

Next, the driving source 30 rotates the clutch forming portions 11 and 12 about the axis S with the tooth portion 11a facing the hole portion 11b and the tooth portion 12a facing the hole portion 12b. In this case, the magnetic flux angle θ of the magnetic flux detected by the magnetic detection element 80 is maintained at zero. Therefore, the sensor signal Gb of the magnetic detection element 80 becomes zero as shown in FIG.

This is because when the toothed portion 11a faces the hole portion 11b and the toothed portion 12a faces the hole portion 12b, when the clutch forming portions 11 and 12 rotate, the magnetic detection element 80 will not rotate. This is because the change in magnetic permeability on the parts 11 and 12 side is suppressed.

FIG. 53 shows theoretical values of the sensor signal of the magnetic detection element 80 in which no dimensional error or the like occurs in the clutch-constituting portions 11 and 12 . A plurality of dots in FIG. 53 indicate sample values of the sensor signal of the magnetic detection element 80 at timings T5, T6, T7, and T8.

As shown in FIGS. 54 to 57, when the clutch forming portions 11 and 12 rotate about the axis S with the tooth portion 11a facing the hole portion 11b and the tooth portion 12a facing the hole portion 12b, , the detected magnetic flux of the magnetic detecting element 80 maintains a state directed radially inward as indicated by an arrow D.

That is, when the clutch forming portions 11 and 12 rotate about the axis S with the tooth portion 11a facing the hole portion 11b and the tooth portion 12a facing the hole portion 12b, the magnetic detecting element 80 The sensor signal Gb is kept at zero amplitude.

Timing T5 in FIG. 54 indicates the direction of magnetic flux detected by the magnetic detection element 80 when the magnetic detection element 80 faces the pair of teeth 11a and hole 12b.

Timing T6 in FIG. 55 is the magnetic flux detected by the magnetic detection element 80 when the magnetic detection element 80 faces the boundary between the pair of teeth 11a and hole 12b and the pair of holes 11b and teeth 12a. Orientation.

Timing T7 in FIG. 56 indicates the direction of the magnetic flux detected by the magnetic detection element 80 when the magnetic detection element 80 faces the pair of hole portion 11b and tooth portion 12a.

Timing T8 in FIG. 57 is the magnetic flux detected by the magnetic detection element 80 when the magnetic detection element 80 faces the boundary between the pair of hole portions 11b and tooth portions 12a and the pair of tooth portions 11a and hole portions 12b. Orientation.

Next, in the present embodiment, a case where the drive source 30 changes the relative rotation speed of the clutch forming portion 11 with respect to the clutch forming portion 12 will be described with reference to FIG.

Timing KNa in FIG. 58 is the timing at which the teeth 11a and 12a face each other and the holes 11b and 12b face each other in a state in which the drive source 30 rotates the clutch components 11 and 12 about the axis S. .

Timing KTa in FIG. 58 is a state in which the drive source 30 rotates the clutch forming portions 11 and 12 about the axis S, and the tooth portion 11a faces the hole portion 11b and the tooth portion 12a faces the hole portion 12b. It is the timing.

At the timing KNa at which the tooth portions 11a and 12a face each other and the hole portions 11b and 12b face each other, the amplitude value of the sensor signal Xa of the magnetic detection element 80 becomes maximum. On the other hand, at the timing KTa when the tooth portion 11a faces the hole portion 11b and the tooth portion 12a faces the hole portion 12b, the sensor signal Xa of the magnetic detection element 80 has the minimum amplitude.

That is, compared to the timing KNa at which the tooth portions 11a and 12a face each other and the hole portions 11b and 12b face each other, the timing KTa at which the tooth portion 11a faces the hole portion 11b and the tooth portion 12a faces the hole portion 12b. Then, the amplitude of the sensor signal Xa becomes small.

Next, the electrical configuration of the power transmission system 1 of this embodiment will be described with reference to FIG.

A power transmission system 1 of this embodiment includes a drive source 30 , an actuator 40 , a control device 50 and a magnetic detection element 80 . The control device 50 is composed of a microcomputer, a memory, and the like.

Control device 50 executes a clutch control process for controlling dog clutch 10 according to a computer program pre-stored in memory. The control device 50 controls the actuators 40 based on sensor signals output from the magnetic detection elements 80 as the clutch control process is executed.

Next, details of clutch control processing in the control device 50 will be described with reference to FIG. The control device 50 executes clutch control processing according to the flowchart of FIG. The clutch control process is executed when the drive source 30 rotates the clutch constituent part 11 while the clutch constituent parts 11 and 12 are rotating to change the relative rotational speed of the clutch constituent part 11 with respect to the clutch constituent part 12. be done.

First, in step S100, the control device 50 determines whether or not the amplitude of the sensor signal of the magnetic detection element 80 is less than the threshold based on the sensor signal of the magnetic detection element 80. FIG.

At this time, when the amplitude of the sensor signal is equal to or greater than the threshold, the control device 50 determines NO in step S100.

In this case, the controller 50 determines in step S120 that the toothed portion 11a is not facing the hole portion 11b and the toothed portion 12a is not facing the hole portion 12b, and the clutch forming portions 11 and 12 are not engaged with each other. It is determined that it is possible timing.

After that, returning to step S100, the control device 50 determines whether or not the amplitude of the sensor signal is less than the threshold based on the sensor signal of the magnetic detection element 80. FIG.

Therefore, as long as the amplitude of the sensor signal is equal to or greater than the threshold, the control device 50 repeats the NO determination in step S100 and the engagement-impossible timing determination in step S120.

After that, the tooth portion 11a faces the hole portion 11b and the tooth portion 12a faces the hole portion 12b. Then, the fluctuation of the magnetic flux angle θ of the magnetic flux detected by the magnetic detection element 80 becomes the minimum value, and the amplitude of the sensor signal of the magnetic detection element 80 becomes zero.

At this time, when the amplitude of the sensor signal is less than the threshold, the control device 50 determines that the amplitude of the sensor signal is minimum, and determines YES in step S100.

In this case, in step S110, the control device 50 allows the clutch forming portions 11 and 12 to engage with each other with the tooth portion 11a facing the hole portion 11b and the tooth portion 12a facing the hole portion 12b. It is determined that it is a certain timing.

Along with this, the control device 50 controls the actuator 40 in step S130. Accordingly, the actuator 40 is controlled by the control device 50 to move the clutch forming portion 11 to one side in the axial direction.

Therefore, each of the plurality of teeth 11a enters one of the plurality of holes 12b, and each of the plurality of teeth 12a enters one of the plurality of holes 11b. 12b.

As a result, the clutch component 11 is engaged with the clutch component 12 . Therefore, the clutch forming portion 11 rotates in conjunction with the clutch forming portion 12 .

According to the present embodiment described above, the position detection device 20 includes the magnets 60A, 60B, the magnetic detection element 80, and the yoke 70.

The yoke 70 constitutes a magnetic field generating portion, and is arranged radially outward of the clearance 13 about the axis S, and has a magnetic flux path portion 73 forming an end face 73a forming an N pole. .

The yoke 70 is arranged radially outward of the clearance 13 about the axis S, is displaced from the magnetic flux path portion 73 to one side in the circumferential direction about the axis S, and further has an N pole. A magnetic flux path portion 74 forming an end face 74a forming a .

Magnetic detection element 80 is arranged radially outward of clutch-constituting portion 11 and clutch-constituting portion 12 about axis S, and is provided between magnetic flux path portion 73 and magnetic flux path portion 74 .

The magnetic detection element 80 outputs a sensor signal indicating the magnetic flux angle θ of the synthesized magnetic flux obtained by synthesizing the first magnetic flux passing between the end face 73a and the clearance 13 and the second magnetic flux passing between the end face 74a and the clearance 13. to output That is, the magnetic detection element 80 outputs a sensor signal indicating the direction of the synthesized magnetic flux.

The magnetic detection element 80 changes the amplitude of the sensor signal according to the positional relationship between the hole portion 11b and the tooth portion 11a and the hole portion 12b and the tooth portion 12a in the rotation direction about the axis S, thereby detecting the position of the sensor signal. Outputs a signal that indicates the relationship.

As described above, it is possible to provide the position detection device 20 that detects the positional relationship between the clutch-forming portion 11 and the clutch-forming portion 12 in the rotational direction.

In this embodiment, the control device 50 determines whether or not the amplitude of the sensor signal is less than the threshold based on the sensor signal of the magnetic detection element 80 . Accordingly, the control device 50 can accurately determine whether or not it is the engageable timing at which the clutch components 11 and 12 can engage with each other.
(27th embodiment)
In the twenty-sixth embodiment, the example in which the end surfaces 73a and 74a of the yoke 70 respectively form the same N poles has been described. However, instead of this, the twenty-seventh embodiment in which the end face 73a of the yoke 70 forms the S pole and the end face 74a of the yoke 70 forms the N pole will be described with reference to FIG.

This embodiment and the twenty-sixth embodiment are substantially the same except for the polarities of the magnetic poles of the end faces 74a and 73a of the position detecting device 20. In FIG. 61, the same reference numerals as in FIG. 47 denote the same items. Therefore, the polarities of the magnetic poles of the end surfaces 74a and 73a of the position detection device 20 will be mainly described.

First, the end surface 74a of the magnetic flux path portion 74 located radially inward about the axis S forms the N pole. In this embodiment, the magnet 60A is arranged radially outside the magnetic flux path portion 74 . A radially inner end surface of the magnet 60A centered on the axis S forms an N pole. A radially outer end surface of the magnet 60A centered on the axis S forms an S pole.

An end surface 73a of the magnetic flux path portion 73 located radially inward about the axis S forms an S pole. In this embodiment, the magnet 60B is arranged radially outside the magnetic flux path portion 73 . A radially inner end surface of the magnet 60B centered on the axis S forms an S pole. A radially outer end surface of the magnet 60B centered on the axis S forms an N pole.
The end face 74a of the magnetic flux path portion 74 and the end face 73a of the magnetic flux path portion 73 form magnetic poles with polarities different from each other. The magnetic flux path portion 73 is arranged radially outward of the clearance 13 about the axis S, and constitutes a first magnetic field generating portion that generates a magnetic flux to pass between the end surface 73 a and the clearance 13 .

The magnetic flux path portion 74 is arranged radially outward of the clearance 13 about the axis S, and constitutes a second magnetic field generating portion that generates a magnetic flux to pass between the end surface 74 a and the clearance 13 .

In this embodiment, the end surface 74a is arranged on one side in the circumferential direction about the axis S with respect to the end surface 73a.

The magnetic detection element 80 is arranged between the magnetic flux path portion 74 and the magnetic flux path portion 73 . The magnetic detection element 80 is arranged radially outward of the clearance 13 between the clutch forming portions 11 and 12 with the axis S as the center. The magnetic detection element 80 includes a magnetic flux path portion 74 and a detection portion 82 that detects a magnetic flux angle θ passing between the magnetic flux path portion 73 .

Here, the detection unit 82 includes a Y-axis Hall element and an X-axis Hall element, as in the twenty-sixth embodiment. The signal value of the sensor signal increases as the magnetic flux angle θ increases, and the signal value of the sensor signal decreases as the magnetic flux angle θ increases.

In FIG. 61, the direction of the magnetic flux detected by the detector 82 is indicated by an arrow F. As shown in FIG. An arrow Yc from the magnetic flux path portion 74 to the magnetic flux path portion 73 through the detection portion 82 is used. The arrow Yc indicates the reference direction indicating zero degree of the magnetic flux angle θ. The magnetic flux angle θ is the angle formed between the arrow Yc and the arrow F. As the arrow F indicating the direction of the magnetic flux rotates counterclockwise, the magnetic flux angle θ decreases, and as the arrow F indicating the direction of the magnetic flux rotates clockwise, the magnetic flux angle θ increases.

In FIG. 61, the arrow F and the arrow Yc point to the other side in the circumferential direction centering on the axis S, and the magnetic flux angle θ is zero. That is, the arrow F and the arrow Yc point to the left in the figure.

Next, FIG. 62 shows the relationship between the positional relationship between the teeth 11a and holes 11b of the clutch-constituting portion 11 and the teeth 12a and holes 12b of the clutch-constituting portion 12 and the sensor signal of the magnetic detection element 80 in this embodiment. 66 will be described.

In this embodiment, the clutch forming portions 11 and 12 rotate about the axis S in a state in which the tooth portions 11a and 12a face each other with the clearance 13 therebetween and the hole portions 11b and 12b face each other with the clearance 13 therebetween. .

In this case, the sensor signal Gc of the magnetic detection element 80 becomes a sine wave as shown in FIG. A plurality of dots in FIG. 62 indicate sample values of the sensor signal of the magnetic detection element 80 at timings T1, T2, T3, and T4.

First, at timing T1, when the end surface 81 of the magnetic detection element 80 faces the pair of teeth 11a and 12a, the magnetic flux detected by the magnetic detection element 80 moves along the axis S as indicated by an arrow G, as shown in FIG. It faces the other side in the circumferential direction of the center. Therefore, the sensor signal Gc of the magnetic detection element 80 becomes zero.

After that, the clutch forming portions 11 and 12 rotate to one side in the circumferential direction about the axis S, and the pair of tooth portions 11a and 12a rotate to one side in the circumferential direction. Then, the magnetic flux detected by the magnetic detection element 80 is influenced by the pair of teeth 11a and 12a and rotates counterclockwise as indicated by arrow H, as shown in FIG. Therefore, the sensor signal Gc of the magnetic detection element 80 becomes smaller.

Arrow H in FIG. 64 indicates the direction of the magnetic flux detected by the magnetic detection element 80 when the magnetic detection element 80 faces the other circumferential end of the teeth 11a and 12a at the timing T2. there is

Next, as the clutch forming portions 11 and 12 rotate to one side in the circumferential direction about the axis S, the magnetic detection element 80 faces the pair of holes 11b and 12b. At this time, the magnetic flux detected by the magnetic detection element 80 is affected by the pair of holes 11b and 12b, rotates clockwise in FIG. turn to the other side. Therefore, the sensor signal Gc of the magnetic detection element 80 becomes large.

Arrow G in FIG. 65 indicates the direction of the magnetic flux detected by the magnetic detection element 80 when the magnetic detection element 80 faces the holes 11b and 12b at timing T3.

Next, as the clutch forming portions 11 and 12 rotate to one side in the circumferential direction about the axis S, the next pair of tooth portions 11 a and 12 a approaches the magnetic detecting element 80 .

At this time, the magnetic flux detected by the magnetic detection element 80 is influenced by the next pair of teeth 11a and 12a and rotates clockwise as indicated by arrow I in FIG. Therefore, the sensor signal Gc of the magnetic detection element 80 becomes large.

Arrow I in FIG. 66 indicates the direction of magnetic flux detected by the magnetic detection element 80 when the magnetic detection element 80 faces one end of the teeth 11a and 12a in the circumferential direction at timing T4. there is

Next, as the clutch forming portions 11 and 12 rotate in one direction in the circumferential direction about the axis S, the pair of tooth portions 11 a and 12 a face the magnetic detecting element 80 .

Accordingly, as shown in FIG. 63, the detected magnetic flux of the magnetic detecting element 80 is influenced by the pair of teeth 11a and 12a, rotates counterclockwise, and rotates about the axis S as indicated by an arrow G. and the other side of the circumference. Therefore, the sensor signal Gc of the magnetic detection element 80 becomes smaller.

Thereafter, as the clutch forming portions 11 and 12 rotate to one side in the circumferential direction about the axis S, the direction of the magnetic flux detected by the detecting portion 82 changes as shown in FIGS. change in order.

As described above, when the clutch forming portions 11 and 12 rotate about the axis S with the tooth portions 11a and 12a facing each other and the hole portions 11b and 12b facing each other, the sensor signal indicating the magnetic flux angle θ of the magnetic field is , a sine wave with a large amplitude value as shown in FIG.

Further, the clutch forming portions 11 and 12 rotate about the axis S with the tooth portion 11a facing the hole portion 11b and the tooth portion 12a facing the hole portion 12b. In this case, the sensor signal Gc of the magnetic detection element 80 has an amplitude of zero as shown in FIG.

This is because when the toothed portion 11a faces the hole portion 11b and the toothed portion 12a faces the hole portion 12b, when the clutch forming portions 11 and 12 rotate, the magnetic detection element 80 will not rotate. This is because the change in magnetic permeability on the parts 11 and 12 side is suppressed.

FIG. 67 shows the theoretical values of the sensor signal of the magnetic detection element 80 in which no dimensional error or the like occurs in the clutch-constituting portions 11 and 12 . A plurality of dots in FIG. 67 indicate sensor signals of the magnetic detection element 80 at timings T5, T6, T7, and T8.

As shown in FIGS. 68 to 71, when the clutch forming portions 11 and 12 rotate with the tooth portion 11a facing the hole portion 11b and the tooth portion 12a facing the hole portion 12b, the magnetic detecting element 80 , the detected magnetic flux is directed to the other side in the circumferential direction as indicated by arrow G.

That is, when the clutch forming portions 11 and 12 rotate about the axis S with the tooth portion 11a facing the hole portion 11b and the tooth portion 12a facing the hole portion 12b, the magnetic detecting element 80 The sensor signal Gd becomes zero.

FIG. 68 shows the direction of the magnetic flux detected by the magnetic detection element 80 when the magnetic detection element 80 faces the pair of teeth 11a and hole 12b at timing T5.

FIG. 69 shows detection of the magnetic detection element 80 when the magnetic detection element 80 faces the boundary portion 14 between the pair of teeth 11a and hole 12b and the pair of holes 11b and teeth 12a at timing T6. It shows the direction of the magnetic flux.

FIG. 70 shows the direction of the magnetic flux detected by the magnetic detection element 80 when the magnetic detection element 80 faces the pair of hole 11b and tooth 12a at timing T7.

FIG. 71 shows detection of the magnetic detection element 80 when the magnetic detection element 80 faces the boundary portion 14 between the pair of hole portions 11b and tooth portions 12a and the pair of tooth portions 11a and hole portions 12b at timing T8. It shows the direction of the magnetic flux.

Next, referring to FIG. 72, in the present embodiment, the drive source 30 changes the relative rotation speed of the clutch forming portion 11 with respect to the clutch forming portion 12 while the clutch forming portions 11 and 12 are rotating. explain.

Timing KNb in FIG. 72 is the timing at which the tooth portions 11a and 12a face each other and the holes 11b and 12b face each other in a state in which the drive source 30 rotates the clutch forming portions 11 and 12 about the axis S. .

Timing KTb in FIG. 72 is a state in which the drive source 30 rotates the clutch forming portions 11 and 12 about the axis S, and the tooth portion 11a faces the hole portion 11b and the tooth portion 12a faces the hole portion 12b. It is the timing.

At the timing KNb at which the tooth portions 11a and 12a face each other and the hole portions 11b and 12b face each other, the amplitude value of the sensor signal Xb of the magnetic detection element 80 becomes maximum. On the other hand, at the timing KTb when the tooth 11a faces the hole 11b and the tooth 12a faces the hole 12b, the amplitude value of the sensor signal Xb of the magnetic detection element 80 becomes the minimum value.

Next, details of clutch control processing in the control device 50 will be described with reference to FIG.

As in the twenty-sixth embodiment, the control device 50 executes clutch control processing according to the flowchart of FIG.

First, in step S100, based on the sensor signal of the magnetic detection element 80, the control device 50 determines whether or not the amplitude of the sensor signal is less than the threshold. At this time, when the amplitude of the sensor signal is equal to or greater than the threshold, the control device 50 determines NO in step S100. In this case, in step S120, the control device 50 determines that it is time for the clutch components 11 and 12 to be unable to engage with each other.

Further, in step S100, when the amplitude of the sensor signal is less than the threshold, the control device 50 determines YES as the amplitude of the sensor signal is minimum. In this case, in step S110, the control device 50 allows the clutch forming portions 11 and 12 to engage with each other with the tooth portion 11a facing the hole portion 11b and the tooth portion 12a facing the hole portion 12b. It is determined that it is a certain timing.

In this case, in step S130, the control device 50 controls the actuator 40 to move the clutch component 11 to one side in the axial direction. As a result, the clutch component 11 is engaged with the clutch component 12 .

According to the present embodiment described above, in the position detecting device 20, the yoke 70 is arranged radially outward of the clearance 13 about the axis S, and the magnetic flux forming the end surface 73a forming the S pole is A path portion 73 is provided.

The yoke 70 is arranged outside the clearance 13 in the radial direction centering on the axis S, is arranged shifted to one side in the circumferential direction centering on the axis S with respect to the magnetic flux path portion 73, and further has an N pole. It has a magnetic flux path portion 74 forming an end face 74a to form.
be.

Magnetic detection element 80 is arranged radially outward of clutch-constituting portion 11 and clutch-constituting portion 12 about axis S, and is provided between magnetic flux path portion 73 and magnetic flux path portion 74 . Magnetic detection element 80 outputs a sensor signal indicating the direction of the magnetic flux passing between magnetic flux path portion 73 and magnetic flux path portion 74 .

The magnetic detection element 80 changes the amplitude of the sensor signal according to the positional relationship between the hole portion 11b and the tooth portion 11a and the hole portion 12b and the tooth portion 12a in the rotation direction about the axis S, thereby detecting the position of the sensor signal. Outputs a signal that indicates the relationship.

As described above, it is possible to provide the position detection device 20 that detects the positional relationship between the clutch-forming portion 11 and the clutch-forming portion 12 in the direction of rotation, as in the twenty-sixth embodiment.

In this embodiment, the control device 50 determines whether or not the amplitude of the sensor signal is less than the threshold based on the sensor signal of the magnetic detection element 80 . Accordingly, the control device 50 can accurately determine whether or not it is the engageable timing at which the clutch components 11 and 12 can engage with each other.

(28th embodiment)
In the ninth embodiment, an example in which the center line T in the axial direction of the position detection device 20 and the detection portion 82 of the magnetic detection element 80 coincides with the center line Z between the clutch forming portions 11 and 12 has been described.

In the twenty-eighth embodiment, the center line T of the position detection device 20 and the detection portion 82 of the magnetic detection element 80 are offset to the other side in the axial direction with respect to the center line Z between the clutch forming portions 11 and 12. An arrangement example will be described with reference to FIGS. 73, 74, and the like.

In this embodiment, the center line Z is an imaginary line perpendicular to the axis S that passes through an intermediate portion between the clutch forming portions 11 and 12 in the axial direction. Center line T is an imaginary line that passes through an intermediate portion between magnetic flux path portion 73 and magnetic flux path portion 74 in the axial direction and that extends radially about axis S as the center.

The configuration of the dog clutch 10 and the position detection device 20 is the same between the present embodiment and the ninth embodiment, except for the positional relationship of the position detection device 20 with respect to the dog clutch 10 . 73 and 74, the same reference numerals as in FIG. 20 indicate the same items. Therefore, in this embodiment, mainly the positional relationship of the position detection device 20 with respect to the dog clutch 10 will be described.

In this embodiment, the magnetic flux path portion 74 and the magnetic flux path portion 73 are arranged to be offset in the axial direction. An end surface 74 a of the magnetic flux path portion 74 is arranged radially outward with respect to the axis S with respect to the clutch forming portion 12 . The end surface 74a faces the tooth portion 12a, the hole portion 12b, and the base portion 12c.

Here, the base portion 12c is arranged on one side in the axial direction with respect to the tooth portion 12a and the hole portion 12b in the clutch forming portion 12, and holds the plurality of tooth portions 12a. The base 12c forms a plurality of holes 12b together with a plurality of teeth 12a. The tooth portion 12a and the base portion 12c of the clutch forming portion 12 are made of a magnetic material containing iron.

An end face 73 a of the magnetic flux path portion 73 is arranged radially outward with respect to the axis S with respect to the clutch forming portion 11 . The end surface 73a faces the tooth portion 11a, the hole portion 11b, and the base portion 11c.

Further, the base portion 11c is arranged on the other side in the axial direction with respect to the tooth portion 11a and the hole portion 11b in the clutch forming portion 11, and holds the plurality of tooth portions 11a. The base 11c forms a plurality of holes 11b together with a plurality of teeth 11a. The tooth portion 11a and the base portion 11c of the clutch forming portion 11 are made of a magnetic material containing iron.

The end surface 74a of the magnetic flux path portion 74 and the end surface 73a of the magnetic flux path portion 73 form the same N magnetic pole. That is, the end face 74a and the end face 73a form magnetic poles of the same polarity.

The magnetic detection element 80 is arranged between the magnetic flux path portion 73 and the magnetic flux path portion 74 of the position detection device 20 . The magnetic detection element 80 is arranged radially outward of the clutch forming portions 11 and 12 with the axis S as the center.

The magnetic detection element 80 includes a detection section 82 and a detection circuit. As shown in FIG. 74, the detection unit 82 detects a composite magnetic flux obtained by synthesizing a first magnetic flux passing between the end face 73a and the clutch forming part 11 and a second magnetic flux passing between the end face 74a and the clutch forming part 12. Detect the angle θ.

Specifically, the detection unit 82 connects the Y-axis Hall element that detects the magnetic flux density in the radial direction centered on the axis S (for example, the vertical direction of the paper surface of FIG. 74) and the magnetic flux paths 74 and 73. and an X-axis Hall element for detecting the magnetic flux density (for example, in the lateral direction of the paper surface of FIG. 74).

In this embodiment, X is the magnetic flux density detected by the X-axis Hall element, Y is the magnetic flux density detected by the Y-axis Hall element, and the angle θ obtained when Y/X=tan θ is detected by the detection unit 82. Let it be the direction of the passing magnetic flux.

A detection circuit of the magnetic detection element 80 outputs a sensor signal indicating the direction of the magnetic flux based on the detection value of the X-axis Hall element and the detection value of the Y-axis Hall element. The angle θ of the combined magnetic flux detected by the detector 82 is hereinafter referred to as the magnetic flux angle θ.

In the present embodiment, the detection portion 82 is arranged in an intermediate portion between the magnetic flux path portion 73 and the magnetic flux path portion 74 in the circumferential direction about the axis S. As shown in FIG.

Next, in the present embodiment, magnetism is detected when the clutch constituting portion 11 and the clutch constituting portion 12 rotate with the tooth portion 11a facing the tooth portion 12a and the hole portion 11b facing the hole portion 12b. The sensor signal Da of the element 80 will be explained.

Here, in FIGS. 75 and 76, the signal component of the sensor signal Da that changes under the influence of the clutch forming portion 11 is defined as the signal component D1a. A signal component of the sensor signal Da that changes under the influence of the clutch forming portion 12 is referred to as a signal component D2a. Here, a signal obtained by adding the signal component D1a and the signal component D2a becomes the sensor signal Da.

In FIG. 74, the arrow Ye indicates the radially inner side from the detecting portion 82 about the axis S. As shown in FIG. An arrow that passes through the detecting portion 82 and points to the other side in the circumferential direction about the axis S is an arrow Yc. The arrow Ye indicates the reference direction indicating zero degree of the magnetic flux angle θ.

The magnetic flux angle θ is the angle formed between the arrow Ye and the arrow F. As the arrow F indicating the direction of the magnetic flux rotates counterclockwise, the magnetic flux angle θ increases, and as the arrow F indicating the direction of the magnetic flux rotates clockwise, the magnetic flux angle θ decreases. A magnetic flux angle θ formed between arrow F and arrow Ye in FIG. 74 indicates a positive magnetic flux angle. The signal component D1a and the signal component D2a will be separately described below with reference to FIG.

(Signal component D1a)
First, at timing T1, when the tooth portion 11a faces the magnetic detection element 80, the signal component D1a reaches its maximum value.

After that, the tooth portion 11 a separates from the magnetic detection element 80 and the hole portion 11 b approaches the magnetic detection element 80 . Accompanying this, the magnetic flux detected by the magnetic detection element 80 rotates clockwise in FIG. Therefore, the signal component D1a becomes smaller.

Next, at timing T2, the hole 11b faces the magnetic detection element 80. As shown in FIG. At this time, the signal component D1a becomes the minimum value.

After that, the hole portion 11 b moves away from the magnetic detection element 80 and the tooth portion 11 a approaches the magnetic detection element 80 . Accompanying this, the magnetic flux detected by the magnetic detection element 80 rotates counterclockwise in FIG. Therefore, the signal component D1a becomes large.

Next, at timing T3, when the tooth portion 11a faces the magnetic detection element 80, the magnetic flux detected by the magnetic detection element 80 is directed toward the tooth portion 11a. Therefore, the signal component D1a becomes the maximum value.

After that, the tooth portion 11 a separates from the magnetic detection element 80 and the hole portion 11 b approaches the magnetic detection element 80 . Accompanying this, the magnetic flux detected by the magnetic detection element 80 rotates clockwise in FIG. Therefore, the signal component D1a becomes smaller.

Next, at timing T4, the hole portion 11b faces the magnetic detection element 80. As shown in FIG. At this time, the signal component D1a becomes the minimum value.

As the clutch-forming portion 11 rotates in this way, the signal component D1a changes in a sinusoidal shape.

(Signal component D2a)
First, at timing T1, when the tooth portion 12a faces the magnetic detection element 80, the signal component D2a becomes the minimum value.

After that, the tooth portion 12 a separates from the magnetic detection element 80 and the hole portion 12 b approaches the magnetic detection element 80 . Accompanying this, the magnetic flux detected by the magnetic detection element 80 rotates counterclockwise in FIG. Therefore, the signal component D2a becomes large.

Next, at timing T2, the hole 12b faces the magnetic detection element 80. As shown in FIG. At this time, the signal component D2a becomes the maximum value.

After that, the hole portion 12b moves away from the magnetic detection element 80, and the tooth portion 12a approaches the magnetic detection element 80. As shown in FIG. Accompanying this, the magnetic flux detected by the magnetic detection element 80 rotates clockwise in FIG. Therefore, the signal component D2a becomes smaller.

Next, at timing T3, when the tooth portion 12a faces the magnetic detection element 80, the magnetic flux detected by the magnetic detection element 80 is directed toward the tooth portion 12a. Therefore, the signal component D2a becomes the minimum value.

After that, the tooth portion 12 a separates from the magnetic detection element 80 and the hole portion 12 b approaches the magnetic detection element 80 . Accompanying this, the magnetic flux detected by the magnetic detection element 80 rotates counterclockwise in FIG. Therefore, the signal component D2a becomes large.

Next, at timing T4, the hole 12b faces the magnetic detection element 80. As shown in FIG. At this time, the signal component D2a becomes the maximum value.

As the clutch-forming portion 12 rotates in this way, the signal component D2a changes in a sinusoidal shape.

Here, the center line T of the position detection device 20 and the detection portion 82 are arranged on the other side in the axial direction with respect to the center line Z between the clutch forming portions 11 and 12 . Therefore, the signal component D1b is affected by the base portion 11c of the clutch-constituting portion 11. FIG. Therefore, the signal component D1a is offset to the positive side of the magnetic flux angle θ with respect to the signal component D2a.

In addition to this, the signal component D1a and the signal component D2a are waveforms having phases opposite to each other. Therefore, the sensor signal Da obtained by adding the signal component D1a and the signal component D2a becomes a sine wave with a small amplitude value.

Next, in the present embodiment, magnetism is detected when the clutch constituting portion 11 and the clutch constituting portion 12 rotate with the tooth portion 11a facing the hole portion 12b and the hole portion 11b facing the tooth portion 12a. The sensor signal Da of the element 80 will be explained.

Hereinafter, the signal component D1a and the signal component D2a included in the sensor signal Da will be described separately with reference to FIG.

(Signal component D1a)
First, at timing T5, when the tooth portion 11a faces the magnetic detection element 80, the signal component D1a reaches its maximum value.

After that, the tooth portion 11 a separates from the magnetic detection element 80 and the hole portion 11 b approaches the magnetic detection element 80 . Accompanying this, the magnetic flux detected by the magnetic detection element 80 rotates clockwise in FIG. Therefore, the signal component D1a becomes smaller.

Next, at timing T6, the hole 11b faces the magnetic detection element 80. As shown in FIG. At this time, the signal component D1a becomes the minimum value.

After that, the hole portion 11 b moves away from the magnetic detection element 80 and the tooth portion 11 a approaches the magnetic detection element 80 . Accompanying this, the magnetic flux detected by the magnetic detection element 80 rotates counterclockwise in FIG. Therefore, the signal component D1a becomes large.

Next, at timing T7, when the tooth portion 11a faces the magnetic detection element 80, the magnetic flux detected by the magnetic detection element 80 is directed toward the clutch forming portion 12 side. Therefore, the signal component D1a becomes the maximum value.

After that, the tooth portion 11 a separates from the magnetic detection element 80 and the hole portion 11 b approaches the magnetic detection element 80 . Accompanying this, the magnetic flux detected by the magnetic detection element 80 rotates clockwise in FIG. Therefore, the signal component D1a becomes smaller.

Next, at timing T8, the hole portion 11b faces the magnetic detection element 80. As shown in FIG. At this time, the magnetic flux detected by the magnetic detection element 80 rotates clockwise. Therefore, the signal component D1 becomes the minimum value.

As the clutch-forming portion 11 rotates in this manner, the signal component D1 changes in a sinusoidal shape.

(Signal component D2a)
First, at timing T5, when the hole 12b faces the magnetic detection element 80, the signal component D2a reaches its maximum value.

After that, the hole portion 12b is separated from the magnetic detection element 80, and the tooth portion 12a approaches the magnetic detection element 80. Then, as shown in FIG. Accompanying this, the magnetic flux detected by the magnetic detection element 80 rotates clockwise in FIG. Therefore, the signal component D2a becomes smaller.

Next, at timing T6, the tooth portion 12a faces the magnetic detection element 80. As shown in FIG. At this time, the signal component D2a becomes the minimum value.

After that, the tooth portion 12 a moves away from the magnetic detection element 80 and the hole portion 12 b approaches the magnetic detection element 80 . Accompanying this, the magnetic flux detected by the magnetic detection element 80 rotates counterclockwise in FIG. Therefore, the signal component D2a becomes large.

Next, at timing T7, when the hole 12b faces the magnetic detection element 80, the signal component D2a reaches its maximum value.

After that, the hole portion 12b is separated from the magnetic detection element 80, and the tooth portion 12a approaches the magnetic detection element 80. Then, as shown in FIG. Accompanying this, the magnetic flux detected by the magnetic detection element 80 rotates clockwise in FIG. Therefore, the signal component D2a becomes smaller.

Next, at timing T8, the tooth portion 12a faces the magnetic detection element 80. As shown in FIG. At this time, the signal component D2a becomes the minimum value.

As the clutch-forming portion 12 rotates in this way, the signal component D2a changes in a sinusoidal shape.

Here, the center line T of the position detection device 20 and the detection portion 82 are arranged on the other side in the axial direction with respect to the center line Z between the clutch forming portions 11 and 12 . Therefore, the signal component D1b is affected by the base portion 11c of the clutch-constituting portion 11. FIG. Therefore, the signal component D1 is offset to the positive side of the magnetic flux angle θ with respect to the signal component D2.

In addition, signal component D1 and signal component D2 are waveforms that are in phase with each other. Therefore, the sensor signal Da obtained by adding the signal component D1a and the signal component D2a becomes a sine wave with a large amplitude value. In this embodiment, the minimum value of the sensor signal Da is greater than zero.

Next, in the present embodiment, while the clutch component 12 is rotating, the driving source 30 rotates the clutch component 11 to change the rotational speed of the clutch component 11 relative to the clutch component 12. The case will be described with reference to FIG.

Timing KNc in FIG. 77 is the timing at which the tooth portions 11a and 12a face each other and the holes 11b and 12b face each other when the clutch forming portions 11 and 12 are rotated about the axis S. As shown in FIG.

Timing KTc in FIG. 77 is the timing at which the toothed portion 11a faces the hole portion 11b and the toothed portion 12a faces the hole portion 12b in a state where the clutch forming portions 11 and 12 are rotated about the axis S. .

At the timing KNc at which the tooth portions 11a and 12a face each other and the hole portions 11b and 12b face each other, the amplitude value of the sensor signal Xc of the magnetic detection element 80 becomes the minimum value. On the other hand, at the timing KTc when the tooth 11a faces the hole 11b and the tooth 12a faces the hole 12b, the amplitude of the sensor signal Xc of the magnetic detection element 80 reaches its maximum value.

Here, the minimum value of the sensor signal Xc of the magnetic detection element 80 is greater than zero when the clutch components 11 and 12 are rotating while the clutch components 11 and 12 are not engaged. .

In FIG. 77, the toothed portion 11a is fitted into the hole portion 11b and the toothed portion 12a is fitted into the hole portion 12b, so that the clutch forming portions 11 and 12 are engaged with each other and the clutch forming portions 11 and 12 are rotated. , the sensor signal Xc converges to zero over time.

Next, details of control processing in the control device 50 will be described with reference to FIGS. 78 and 79. FIG. FIG. 78 is a flow chart showing the details of the clutch control process in the control device 50. FIG. FIG. 79 is a flow chart showing the details of the engagement determination process in the control device 50. FIG. The clutch control process and the engagement determination process will be independently described below.

(Clutch control process engagement determination process)
The control device 50 executes clutch control processing according to the flowchart of FIG.

First, in step S100A, the control device 50, as the engagement determination section, determines whether or not the sensor signal from the magnetic detection element 80 is equal to or greater than the threshold Ha.

At this time, when the sensor signal is less than the threshold Ha, the controller 50 determines NO in step S100A. In this case, in step S120, the control device 50 determines that it is the timing at which the clutch components 11 and 12 cannot engage with each other.

Further, in step S100A, when the sensor signal is equal to or greater than the threshold value Ha, the control device 50 determines YES as the amplitude of the sensor signal is maximum. In this case, in step S110, the control device 50 allows the clutch forming portions 11 and 12 to engage with each other with the tooth portion 11a facing the hole portion 11b and the tooth portion 12a facing the hole portion 12b. It is determined that it is a certain timing.

In this case, in step S130, the control device 50, as the engagement control section, controls the actuator 40 to move the clutch forming section 11 to one side in the axial direction. As a result, the clutch component 11 is engaged with the clutch component 12 .

(Engagement determination process)
The control device 50 executes engagement determination processing according to the flowchart of FIG. The engagement determination process is executed each time the control device 50 executes the engagement control process of step S130.

First, in step S140, the control device 50, as the engagement completion determination unit, determines whether or not the sensor signal of the magnetic detection element 80 has converged to a first predetermined value (for example, zero). Specifically, the control device 50 determines whether or not the absolute value of the sensor signal is less than the threshold Hb.

The first predetermined value in this embodiment is a value smaller than the minimum value of the sensor signal of the magnetic detection element 80 when the controller 50 determines YES in step S100A that the sensor signal is equal to or greater than the threshold value Ha.

At this time, when the absolute value of the sensor signal is less than the threshold value Hb, the control device 50 judges that the sensor signal of the magnetic detection element 80 has converged to the first predetermined value, and determines YES in step S140. Along with this, the control device 50 determines in step S142 that the engagement of the clutch components 11 and 12 has been completed.

On the other hand, when the sensor signal is equal to or greater than the threshold value Hb, the control device 50 determines that the sensor signal of the magnetic detection element 80 has not converged to the first predetermined value and determines NO in step S140. Along with this, in step S143, the control device 50 determines that the engagement of the clutch components 11 and 12 has not been completed.

According to the present embodiment described above, the position detection device 20 includes the magnets 60A, 60B, the magnetic detection element 80, and the yoke 70. The yoke 70 has a magnetic flux path portion 73 as a magnetic field generating portion that is arranged radially outward of the clutch forming portion 11 about the axis S and that forms an end face 73a that forms an N pole.

The yoke 70 has a magnetic flux path portion 74 as a magnetic field generating portion that is disposed radially outward of the clutch forming portions 11 and 12 about the axis S and that forms an end face 74a that forms an N pole. The magnetic detection element 80 is arranged radially outward of the clutch forming portions 11 and 12 about the axis S, and is provided between the magnetic flux path portions 73 and 74 .

The magnetism detection element 80 detects a magnetic flux angle θ of a synthesized magnetic flux obtained by synthesizing a first magnetic flux passing between the end face 73a and the clutch-constituting portion 11 and a second magnetic flux passing between the end face 74a and the clutch-constituting portion 12. output a sensor signal indicating

The magnetic detection element 80 changes the amplitude of the sensor signal according to the positional relationship between the hole portion 11b and the tooth portion 11a and the hole portion 12b and the tooth portion 12a in the rotation direction about the axis S, thereby detecting the position of the sensor signal. Outputs a signal that indicates the relationship.

As described above, it is possible to provide the position detection device 20 that detects the positional relationship between the clutch-forming portion 11 and the clutch-forming portion 12 in the rotational direction.

In this embodiment, the control device 50 determines whether or not the amplitude of the sensor signal is greater than or equal to the threshold based on the sensor signal from the magnetic detection element 80 . Accordingly, the control device 50 can accurately determine whether or not it is the engageable timing at which the clutch components 11 and 12 can engage with each other.

In this embodiment, the control device 50 determines whether or not the sensor signal of the magnetic detection element 80 has converged to a first predetermined value (for example, zero), thereby completing the engagement of the clutch components 11 and 12. determine whether or not This makes it possible to accurately determine whether or not the engagement of the clutch components 11 and 12 has been completed.

(29th embodiment)
In the twenty-eighth embodiment, the example in which the end surfaces 73a and 74a of the yoke 70 respectively form the N poles has been described. However, instead of this, the twenty-ninth embodiment in which the end surface 73a of the yoke 70 forms the S pole and the end surface 74a forms the N pole will be described with reference to FIG. 80 and the like.

The present embodiment and the twenty-eighth embodiment are substantially the same except for the polarities of the magnetic poles of the end surfaces 73a and 74a of the yoke 70. Other configurations are substantially the same. In FIG. 80, the same reference numerals as in FIGS. 73 and 74 denote the same items.

Here, the end face 74a arranged radially inward about the axis S in the magnetic flux path portion 74 forms the N pole. A magnet 60A is arranged radially outside the magnetic flux path portion 74 . A radially inner end surface of the magnet 60A centered on the axis S forms an N pole. A radially outer end surface of the magnet 60A centered on the axis S forms an S pole.

An end surface 73a of the magnetic flux path portion 73 located radially inward about the axis S forms an S pole. In this embodiment, the magnet 60B is arranged radially outside the magnetic flux path portion 73 . A radially inner end surface of the magnet 60B centered on the axis S forms an S pole. A radially outer end surface of the magnet 60A centered on the axis S forms an N pole.

The end face 74a of the magnetic flux path portion 74 and the end face 73a of the magnetic flux path portion 73 form magnetic poles with polarities different from each other. In the present embodiment, the center line T of the position detection device 20 and the detection portion 82 of the magnetic detection element 80 are offset to the other side in the axial direction with respect to the center line Z between the clutch forming portions 11 and 12. It is

An end surface 74 a of the magnetic flux path portion 74 is arranged radially outward with respect to the axis S with respect to the clutch forming portion 12 . The end surface 74a faces the tooth portion 12a, the hole portion 12b, and the base portion 12c.

An end surface 73 a of the magnetic flux path portion 73 is arranged radially outward with respect to the axis S with respect to the clutch forming portion 11 . The end surface 73a faces the tooth portion 11a, the hole portion 11b, and the base portion 11c.

The magnetic detection element 80 is arranged radially outward of the clutch forming portions 11 and 12 with the axis S as the center. The magnetic detection element 80 is provided between the magnetic flux path portions 73 and 74 . The magnetic detection element 80 outputs a sensor signal indicating the angle θ of the magnetic flux passing between the magnetic flux path portion 73 and the magnetic flux path portion 74 .

The magnetic detection element 80 changes the amplitude of the sensor signal according to the positional relationship between the hole portion 11b and the tooth portion 11a and the hole portion 12b and the tooth portion 12a in the rotation direction about the axis S, thereby detecting the position of the sensor signal. Outputs a signal that indicates the relationship.

Next, in this embodiment, the sensor of the magnetic detection element 80 is detected when the clutch forming portions 11 and 12 rotate with the tooth portion 11a facing the tooth portion 12a and the hole portion 11b facing the hole portion 12b. Signal Db will be described with reference to FIGS. 80, 81 and 82. FIG.

Here, in FIGS. 81 and 82, the signal component of the sensor signal Db that changes under the influence of the clutch-constituting portion 11 is referred to as a signal component D1b. A signal component D2b is a signal component of the sensor signal Db that changes under the influence of the clutch component 12 . Here, a signal obtained by adding the signal component D1b and the signal component D2b becomes the sensor signal Db.

In FIG. 80, the direction of the magnetic flux detected by the detecting portion 82 of the magnetic detecting element 80 is indicated by an arrow F. An arrow Yc from the magnetic flux path portion 74 to the magnetic flux path portion 73 through the detection portion 82 is used. The arrow Yc indicates the reference direction indicating zero degree of the magnetic flux angle θ. The magnetic flux angle θ is the angle formed between the arrow Yc and the arrow F. As the arrow F indicating the direction of the magnetic flux rotates counterclockwise, the magnetic flux angle θ decreases, and as the arrow F indicating the direction of the magnetic flux rotates clockwise, the magnetic flux angle θ increases.

In FIG. 80, the arrow F and the arrow Yc point to the other side in the circumferential direction about the axis S, and the magnetic flux angle θ is zero. FIG. 80 shows the case where the arrow F and the arrow Yc point to the left in the figure.

Hereinafter, the signal component D1b and the signal component D2b included in the sensor signal Db will be described separately with reference to FIGS. 80 and 81. FIG.

(Signal component D1b)
First, at timing T1, when the tooth portion 11a faces the magnetic detection element 80, the signal component D1b reaches its maximum value.

After that, the tooth portion 11 a separates from the magnetic detection element 80 and the hole portion 11 b approaches the magnetic detection element 80 . Accompanying this, the magnetic flux detected by the magnetic detection element 80 rotates counterclockwise in FIG. Therefore, the signal component D1b becomes smaller.

Next, at timing T2, the hole 11b faces the magnetic detection element 80. As shown in FIG. At this time, the signal component D1 becomes the minimum value.

After that, the hole portion 11 b moves away from the magnetic detection element 80 and the tooth portion 11 a approaches the magnetic detection element 80 . Accompanying this, the magnetic flux detected by the magnetic detection element 80 rotates clockwise in FIG. Therefore, the signal component D1b becomes large.

Next, at timing T3, when the tooth portion 11a faces the magnetic detection element 80, the signal component D1b reaches its maximum value.

After that, the tooth portion 11 a separates from the magnetic detection element 80 and the hole portion 11 b approaches the magnetic detection element 80 . Accompanying this, the magnetic flux detected by the magnetic detection element 80 rotates counterclockwise in FIG. Therefore, the signal component D1 becomes smaller.

Next, at timing T4, the hole portion 11b faces the magnetic detection element 80. As shown in FIG. At this time, the signal component D1 becomes the minimum value.

As the clutch-forming portion 11 rotates in this manner, the signal component D1 changes in a sinusoidal shape.

(Signal component D2b)
First, at timing T1, when the tooth portion 12a faces the magnetic detection element 80, the signal component D2b becomes the minimum value.

After that, the tooth portion 12 a separates from the magnetic detection element 80 and the hole portion 12 b approaches the magnetic detection element 80 . Accompanying this, the magnetic flux detected by the magnetic detection element 80 rotates clockwise in FIG. Therefore, the signal component D2 becomes large.

Next, at timing T2, the hole 12b faces the magnetic detection element 80. As shown in FIG. At this time, the signal component D2b becomes the maximum value.

After that, the hole portion 12b moves away from the magnetic detection element 80, and the tooth portion 12a approaches the magnetic detection element 80. As shown in FIG. Accompanying this, the magnetic flux detected by the magnetic detection element 80 rotates counterclockwise in FIG. Therefore, the signal component D2b becomes smaller.

Next, at timing T3, when the tooth portion 12a faces the magnetic detection element 80, the signal component D2b becomes the minimum value.

After that, the tooth portion 12 a separates from the magnetic detection element 80 and the hole portion 12 b approaches the magnetic detection element 80 . Accompanying this, the magnetic flux detected by the magnetic detection element 80 rotates clockwise in FIG. Therefore, the signal component D2b becomes large.

Next, at timing T4, the hole 12b faces the magnetic detection element 80. As shown in FIG. At this time, the signal component D2b becomes the maximum value.

As the clutch-forming portion 12 rotates in this way, the signal component D2b changes in a sinusoidal shape.

Here, the center line T of the position detection device 20 and the detection portion 82 are arranged on the other side in the axial direction with respect to the center line Z between the clutch forming portions 11 and 12 . Therefore, the signal component D1b is affected by the base portion 11c of the clutch-constituting portion 11. FIG. Therefore, the signal component D1b is offset to the positive side of the magnetic flux angle θ with respect to the signal component D2b.

In addition to this, the signal component D1 and the signal component D2 are waveforms having opposite phases to each other. Therefore, the sensor signal Db obtained by adding the signal component D1b and the signal component D2b becomes a sine wave with a small amplitude value.

Next, in the present embodiment, magnetism is detected when the clutch constituting portion 11 and the clutch constituting portion 12 rotate with the tooth portion 11a facing the hole portion 12b and the hole portion 11b facing the tooth portion 12a. The sensor signal Db of the element 80 will be explained.

Hereinafter, the signal component D1b and the signal component D2b included in the sensor signal Db will be described separately with reference to FIGS. 80 and 82. FIG.

(Signal component D1b)
First, at timing T5, when the tooth portion 11a faces the magnetic detection element 80, the signal component D1b reaches its maximum value.

After that, the tooth portion 11 a separates from the magnetic detection element 80 and the hole portion 11 b approaches the magnetic detection element 80 . Accompanying this, the magnetic flux detected by the magnetic detection element 80 rotates counterclockwise in FIG. Therefore, the signal component D1b becomes smaller.

Next, at timing T6, the hole 11b faces the magnetic detection element 80. As shown in FIG. At this time, the signal component D1b becomes the minimum value.

After that, the hole portion 11 b moves away from the magnetic detection element 80 and the tooth portion 11 a approaches the magnetic detection element 80 . Accompanying this, the magnetic flux detected by the magnetic detection element 80 rotates clockwise in FIG. Therefore, the signal component D1b becomes large.

Next, at timing T7, when the tooth portion 11a faces the magnetic detection element 80, the signal component D1b reaches its maximum value.

After that, the tooth portion 11 a separates from the magnetic detection element 80 and the hole portion 11 b approaches the magnetic detection element 80 . Accompanying this, the magnetic flux detected by the magnetic detection element 80 rotates clockwise in FIG. Therefore, the signal component D1b becomes smaller.

Next, at timing T8, when the hole 11b faces the magnetic detection element 80, the signal component D1b becomes the minimum value.

As the clutch-forming portion 11 rotates in this manner, the signal component D1b changes in a sinusoidal shape.

(Signal component D2b)
First, at timing T5, when the hole 12b faces the magnetic detection element 80, the signal component D2b reaches its maximum value.

After that, the hole portion 12b is separated from the magnetic detection element 80, and the tooth portion 12a approaches the magnetic detection element 80. Then, as shown in FIG. Accompanying this, the magnetic flux detected by the magnetic detection element 80 rotates counterclockwise in FIG. Therefore, the signal component D2b becomes smaller.

Next, at timing T6, the tooth portion 12a faces the magnetic detection element 80. As shown in FIG. At this time, the signal component D2b becomes the minimum value.

After that, the tooth portion 12 a moves away from the magnetic detection element 80 and the hole portion 12 b approaches the magnetic detection element 80 . Accompanying this, the magnetic flux detected by the magnetic detection element 80 rotates clockwise in FIG. Therefore, the signal component D2b becomes large.

Next, at timing T7, when the hole 12b faces the magnetic detection element 80, the signal component D2b reaches its maximum value.

After that, the hole portion 12b is separated from the magnetic detection element 80, and the tooth portion 12a approaches the magnetic detection element 80. Then, as shown in FIG. Accompanying this, the magnetic flux detected by the magnetic detection element 80 rotates counterclockwise in FIG. Therefore, the signal component D2b becomes smaller.

Next, at timing T8, the tooth portion 12a faces the magnetic detection element 80. As shown in FIG. At this time, the signal component D2b becomes the minimum value.

As the clutch-forming portion 12 rotates in this way, the signal component D2b changes in a sinusoidal shape.

Here, the center line T of the position detection device 20 and the detection portion 82 are arranged on one side in the axial direction with respect to the center line Z between the clutch forming portions 11 and 12 . Therefore, the signal component D1b is affected by the base portion 11c of the clutch-constituting portion 11. FIG. Therefore, the signal component D1b is offset to the positive side of the magnetic flux angle θ with respect to the signal component D2b.

In addition to this, the signal component D1b and the signal component D2b are waveforms that are in phase with each other. Therefore, the sensor signal Db obtained by adding the signal component D1b and the signal component D2b becomes a sine wave with a large amplitude value.

In this embodiment, the minimum value of the sensor signal Db is greater than zero when the clutch components 11 and 12 are rotating while the clutch components 11 and 12 are not engaged.

Next, in the present embodiment, while the clutch components 11 and 12 are rotating, the drive source 30 rotates the clutch component 11 to change the rotational speed of the clutch component 11 relative to the clutch component 12. A case of changing will be described with reference to FIG.

Timing KNd in FIG. 83 is the timing at which the tooth portions 11a and 12a face each other and the holes 11b and 12b face each other when the clutch forming portions 11 and 12 are rotated about the axis S. As shown in FIG.

Timing KTd in FIG. 83 is the timing at which the toothed portion 11a faces the hole portion 11b and the toothed portion 12a faces the hole portion 12b in a state where the clutch forming portions 11 and 12 are rotated about the axis S. .

At the timing KNd at which the tooth portions 11a and 12a face each other and the hole portions 11b and 12b face each other, the amplitude value of the sensor signal Xd of the magnetic detection element 80 becomes the minimum value. On the other hand, at the timing KTd when the tooth portion 11a faces the hole portion 11b and the tooth portion 12a faces the hole portion 12b, the amplitude of the sensor signal Xd of the magnetic detection element 80 becomes maximum.

Here, the minimum value of the sensor signal Xd of the magnetic detection element 80 is greater than zero when the clutch components 11 and 12 are rotating while the clutch components 11 and 12 are not engaged. .

In FIG. 83, when the toothed portion 11a is fitted into the hole portion 11b and the toothed portion 12a is fitted into the hole portion 12b, and the clutch forming portions 11 and 12 are engaged with each other, the sensor signal Xc is generated with time. It converges to zero over time.

In FIG. 83, Dt indicates the DC component of the sensor signal Xd of the magnetic detection element 80. In FIG. When the clutch components 11 and 12 are not engaged with each other, the DC component of the sensor signal Xd is positive. In the state in which the clutch components 11 and 12 are engaged with each other, the direct current component of the sensor signal Xd converges to zero over time.

Next, details of control processing in the control device 50 will be described with reference to FIGS. 78 and 79. FIG.

As in the twenty-eighth embodiment, the control device 50 executes clutch control processing according to the flowchart of FIG.

Therefore, in step S100A, when the amplitude of the sensor signal is less than the threshold, control device 50 determines NO in step S100. In this case, in step S120, the control device 50 determines that it is the timing at which the clutch components 11 and 12 cannot engage with each other.

In step S100A, when the amplitude of the sensor signal is equal to or greater than the threshold, the control device 50 determines YES as the amplitude of the sensor signal is maximum. In this case, in step S110, the control device 50 allows the clutch forming portions 11 and 12 to engage with each other with the tooth portion 11a facing the hole portion 11b and the tooth portion 12a facing the hole portion 12b. It is determined that it is a certain timing.

In this case, in step S130, the control device 50 controls the actuator 40 to move the clutch component 11 to one side in the axial direction. As a result, the clutch component 11 is engaged with the clutch component 12 .

As in the twenty-eighth embodiment, the control device 50 executes the engagement determination process according to the flowchart of FIG.

Therefore, the control device 50 determines whether or not the sensor signal of the magnetic detection element 80 has converged to a first predetermined value (for example, zero). Specifically, when the sensor signal is less than the threshold value Hb, the control device 50 judges that the sensor signal of the magnetic detection element 80 has converged to the first predetermined value, and determines YES in step S140. Along with this, the control device 50 determines in step S142 that the engagement of the clutch components 11 and 12 has been completed.

On the other hand, when the sensor signal is equal to or greater than the threshold value Hb, the control device 50 determines that the sensor signal of the magnetic detection element 80 has not converged to the first predetermined value and determines NO in step S140. Along with this, in step S143, the control device 50 determines that the engagement of the clutch components 11 and 12 has not been completed.

According to the present embodiment described above, as in the twenty-eighth embodiment, it is possible to provide the position detection device 20 that detects the positional relationship between the clutch-constituting portions 11 and 12 in the rotational direction.

In this embodiment, the control device 50 determines whether or not the amplitude of the sensor signal is greater than or equal to the threshold based on the sensor signal from the magnetic detection element 80 . Accordingly, the control device 50 can accurately determine whether or not it is the engageable timing at which the clutch components 11 and 12 can engage with each other.

In this embodiment, the control device 50 determines whether or not the sensor signal of the magnetic detection element 80 has converged to a first predetermined value (for example, zero), thereby completing the engagement of the clutch components 11 and 12. determine whether or not This makes it possible to accurately determine whether or not the engagement of the clutch components 11 and 12 has been completed.

(Other embodiments)
(1) In the above-described first and seventh embodiments, an example in which a permanent magnet is used as the magnet 60 of the position detection device 20 has been described. good too.

(2) In the second to sixth and eighth to twenty-ninth embodiments, permanent magnets are used as the magnets 60A and 60B of the position detection device 20. Electromagnets may be used as the magnets 60A and 60B.

(3) In the above-described first and seventh embodiments, an example of using one magnet in the position detection device 20 is described, and in the above-described second to sixth and eighth to twenty-ninth embodiments, the position detection 20, an example using two magnets was described.

However, instead of this, three or more magnets may be used in the position detecting device 20 in the second to sixth and eighth to twenty-fifth embodiments.

Furthermore, in the twenty-sixth to twenty-ninth embodiments, an example in which two magnets are used in the position detection device 20 has been described. The position detection device 20 may be configured using a magnet.

(4) In the eleventh and twelfth embodiments described above, the example in which the gap 75d is provided in the magnetic flux path portion 75 of the yoke 70 in the position detection device 20 has been described. Alternatively, gaps may be provided in the magnetic flux path portions 74 and 73 of the yoke 70 .

(5) In the eleventh and twelfth embodiments described above, in the position detection device 20, the yoke 70 is provided with the gap 75d for dividing the yoke 70 in the magnetic flux passing direction.

However, similarly to this, in the first to tenth and thirteenth to twenty-ninth embodiments, in the position detecting device 20, the yoke 70 may be provided with a gap.

(6) In the first to twenty-ninth embodiments, examples in which the magnetic detection element 80 is configured with a Hall element have been described. Element 80 may be constructed.

(7) In the first to twenty-ninth embodiments, the actuator 40 moves the clutch component 11 to one side in the axial direction to connect the clutch component 11 to the clutch component 12. , you can do the following:

For example, the actuator 40 moves the clutch component 12 to the other side in the axial direction to connect the clutch component 12 to the clutch component 11 .

Alternatively, the actuator 40 moves the clutch forming portion 12 to the other side in the axial direction and moves the clutch forming portion 11 to the one side in the axial direction, thereby connecting the clutch forming portions 12 and 11 .

(8) In the first and sixth embodiments, the examples in which the surface 62 of the magnet 60 is directed radially inward and the surface 61 of the magnet 60 is directed radially outward have been described. Alternatively, however, the surface 61 of the magnet 60 may be directed radially inward and the surface 62 of the magnet 60 may be directed radially outward.

(9) In the twenty-sixth and twenty-eighth embodiments, the radial inner side of the magnet 60A is the N pole, the radial outer side of the magnet 60A is the S pole, and the radial inner side of the magnet 60B is the N pole. An example in which the radially outer side of 60B is the S pole has been described.

Alternatively, the radially inner side of the magnet 60A may be the S pole, the radially outer side of the magnet 60A may be the N pole, the radially inner side of the magnet 60B may be the S pole, and the radially outer side of the magnet 60B may be the N pole. It may be the pole. In this case, the end face 73a of the yoke 70 forms the south pole, and the end face 74a of the yoke 70 forms the south pole.

(10) In the twenty-seventh and twenty-ninth embodiments, the magnet 60A has a north pole on the radially inner side, a south pole on the radially outer side of the magnet 60A, and a south pole on the radially inner side of the magnet 60B. An example in which the radially outer side of 60B is the north pole has been described.

However, instead of this, the radially inner side of magnet 60A is the S pole, the radially outer side of magnet 60A is the N pole, the radially inner side of magnet 60B is the N pole, and the radially outer side of magnet 60B is the N pole. may be used as the S pole.

In this case, the end face 73a of the yoke 70 forms the north pole, and the end face 74a of the yoke 70 forms the south pole.

(11) In the twenty-eighth and twenty-ninth embodiments, the center line T of the position detection device 20 and the detection portion 82 are offset to the other side in the axial direction with respect to the center line Z between the clutch forming portions 11 and 12. We have described an example in which

However, instead of this, the center line T of the position detection device 20 and the detection portion 82 may be offset to one side in the axial direction with respect to the center line Z between the clutch forming portions 11 and 12. .

In this case, when the drive source 30 rotates the clutch-constituting portion 11 while the clutch-constituting portion 12 is rotating to change the relative rotational speed of the clutch-constituting portion 11 with respect to the clutch-constituting portion 12, the magnetic detecting element The sensor signal X of 80 is as shown in FIG.

Here, the maximum value of the sensor signal X of the magnetic detection element 80 is smaller than zero when the clutch components 11 and 12 are rotating while the clutch components 11 and 12 are not engaged. .

As in the twenty-eighth and twenty-ninth embodiments, the control device 50 executes engagement determination processing according to the flowchart of FIG.

Therefore, the control device 50 determines whether or not the sensor signal of the magnetic detection element 80 has converged to a first predetermined value (for example, zero). Specifically, when the sensor signal is equal to or greater than the threshold value Hc, the control device 50 judges that the sensor signal of the magnetic detection element 80 has converged to the first predetermined value, and determines YES in step S140. Along with this, the control device 50 determines in step S142 that the engagement of the clutch components 11 and 12 has been completed.

On the other hand, when the sensor signal is less than the threshold value Hc, the control device 50 judges NO in step S140 as the sensor signal of the magnetic detection element 80 has not converged to the first predetermined value. Along with this, in step S143, the control device 50 determines that the engagement of the clutch components 11 and 12 has not been completed.

(12) In the twenty-eighth and twenty-ninth embodiments, the case where the minimum value of the sensor signal X of the magnetic detection element 80 is greater than zero has been described.

However, depending on the positional relationship among the center line T, the detection portion 82, and the center line Z of the position detection device 20, and the shapes of the clutch-constituting portions 11 and 12, the sensor signal X of the magnetic detection element 80 may be as shown in FIG. It may be as shown in FIG.

85 and 86 show the case where the driving source 30 rotates the clutch forming part 11 while the clutch forming part 12 is rotating to change the rotational speed of the clutch forming part 11 relative to the clutch forming part 12. shows the sensor signal X of the magnetic detection element 80 at .

In FIG. 85, the sensor signal X of the magnetic detection element 80 has a maximum value greater than zero and a minimum value less than zero. In FIG. 85, signal Dt indicates the DC component of sensor signal Xc. When the clutch components 11 and 12 are not engaged with each other, the DC component of the sensor signal X has a positive value. When the clutch components 11 and 12 are engaged with each other, the DC component of the sensor signal X converges to a second predetermined value (for example, zero).

In FIG. 86, the sensor signal X of the magnetic detection element 80 has a maximum value greater than zero and a minimum value less than zero. In FIG. 86, signal Dt indicates the DC component of sensor signal Xc. When the clutch components 11 and 12 are not engaged with each other, the DC component of the sensor signal X is negative. When the clutch components 11 and 12 are engaged with each other, the DC component of the sensor signal X converges to a second predetermined value (for example, zero).

In such a case, the control device 50 executes engagement determination processing according to the flowchart of FIG. The engagement determination process is executed each time the control device 50 executes the engagement control process of step S130.

First, in step S140A, control device 50, as an engagement completion determination unit, extracts a DC component from the sensor signal of magnetic detection element 80, and the absolute value of the extracted DC component is a second predetermined value (for example, zero). ) is determined.

In this embodiment, the second predetermined value is the absolute value of the DC component of the sensor signal of the magnetic detection element 80 when the clutch components 11 and 12 rotate while the clutch components 11 and 12 are not engaged. is less than the value

Specifically, the control device 50 determines whether or not the absolute value of the DC component in the sensor signal is less than the threshold value Hd.

At this time, when the absolute value of the DC component of the sensor signal is less than the threshold value Hd, the controller 50 determines that the DC component of the sensor signal of the magnetic detection element 80 has converged to the second predetermined value, and determines that the DC component has converged to the second predetermined value in step S140. , YES is determined. Along with this, the control device 50 determines in step S142 that the engagement of the clutch components 11 and 12 has been completed.

On the other hand, when the absolute value of the DC component of the sensor signal is equal to or greater than the threshold value Hd, the control device 50 determines that the DC component of the sensor signal of the magnetic detection element 80 has not converged to the second predetermined value, , NO. Along with this, in step S143, the control device 50 determines that the engagement of the clutch components 11 and 12 has not been completed.

(13) In the first to twenty-ninth embodiments, an example in which the control device 50 is composed of a microcomputer has been described. The control device 50 may be configured by an electronic circuit such as the following.

(14) In the first to twenty-ninth embodiments, the examples in which the plurality of teeth 12a, the plurality of holes 11b, the plurality of teeth 12a, and the plurality of holes 12b are exposed to the atmosphere have been described.

However, instead of this, the plurality of teeth 12a, the plurality of holes 11b, the plurality of teeth 12a, and the plurality of holes 12b may be exposed to gas or liquid other than the atmosphere.

(15) In the twenty-eighth and twenty-ninth embodiments, the control device 50 determines whether or not the sensor signal of the magnetic detection element 80 has converged to the first predetermined value, thereby determining whether the clutch components 11 and 12 are engaged. An example has been described in which it is determined whether or not the combination is completed.

Alternatively, as in (12) above, the control device 50 determines whether or not the absolute value of the DC component of the sensor signal has converged to the second predetermined value. It may be determined that the engagement of the components 11 and 12 has been completed.

(16) It should be noted that the present invention is not limited to the above-described embodiments, and can be appropriately modified within the scope of the claims. Moreover, the above-described embodiments are not unrelated to each other, and can be appropriately combined except when combination is clearly impossible. Further, in each of the above-described embodiments, it goes without saying that the elements constituting the embodiment are not necessarily essential, unless it is explicitly stated that they are essential, or they are clearly considered essential in principle. stomach. In addition, in each of the above-described embodiments, when numerical values such as the number, numerical value, amount, range, etc. of the constituent elements of the embodiment are mentioned, when it is explicitly stated that they are particularly essential, and when they are clearly limited to a specific number in principle is not limited to that particular number. In addition, in each of the above embodiments, when referring to the shape, positional relationship, etc. of the constituent elements, the shape, It is not limited to the positional relationship or the like.

(summary)
According to the first aspect described in the first to twenty-ninth embodiments and some or all of the other embodiments, the power transmission system includes a dog clutch, and the dog clutch comprises a first clutch component and A second clutch component is provided.

The first clutch forming portion is configured to be rotatable about an axis extending in the axial direction when a predetermined direction is defined as the axial direction, and has a first hole portion that is concave on one side in the axial direction and a first hole portion that is convex on the other side in the axial direction. 1 teeth are alternately arranged in the circumferential direction around the axis.

The second clutch component is arranged on the other side in the axial direction with respect to the first clutch component, is configured to be rotatable about the axis, and is located on the one side in the axial direction of the second hole recessed on the other side in the axial direction. The convex second teeth are alternately arranged in the circumferential direction around the axis.

While the drive source rotates the first clutch component about the axis, the actuator moves one of the first clutch component and the second clutch component to the other side to move the first tooth portion into the second hole. and insert the second tooth into the first hole.

As a result, the rotational force output from the drive source is transmitted from the first clutch component to the second clutch component.

The position detection device is disposed radially outward of the first clutch component and the second clutch component about the axis, and generates a magnetic field having a first magnetic pole portion and a second magnetic pole portion that form mutually different polarities. have a department.

The position detection device has a yoke and a magnetic detection element. The yoke has a first end face positioned radially outward about the axis with respect to the first tooth or the first hole, and passes magnetic flux between the first end face and the first magnetic pole portion. a first magnetic flux path portion for allowing

The yoke has a second end face positioned radially outwardly about the axis with respect to the second tooth or the second hole, and passes magnetic flux between the second pole portion and the second end face. and a second magnetic flux path portion for causing the magnetic flux path.

The magnetic detection element is arranged radially outward about the axis with respect to the first clutch component and the second clutch component. The magnetic detection element is provided between the first magnetic flux path portion and the second magnetic flux path portion, and outputs a sensor signal indicating the direction of the magnetic flux passing between the first magnetic flux path portion and the second magnetic flux path portion.

The magnetic detection element is rotated about the axis depending on the positional relationship between the first hole and first tooth of the first clutch component and the second hole and second tooth of the second clutch component. A signal indicating the positional relationship is output as a sensor signal by changing the direction of the magnetic flux.

According to a second aspect, the magnetic field generator comprises one magnet having a first magnetic pole portion and a second magnetic pole portion.

Therefore, the position detection device can be configured at low cost.

According to a third aspect, the magnetic field generating section includes a first magnet including a first magnetic pole section and a third magnetic pole section having a polarity different from that of the first magnetic pole section, a second magnetic pole section, and a second magnetic pole section. a second magnet comprising fourth pole pieces having opposite polarities.

A third magnetic flux path portion is provided for allowing magnetic flux to pass between the third magnetic pole portion of the first magnet and the fourth magnetic pole portion of the second magnet. The first magnetic pole portion and the fourth magnetic pole portion have the same polarity. The third magnetic pole portion and the second magnetic pole portion have the same polarity.

Thus, since the magnetic field generator is configured using two magnets, the magnetic flux generated from the magnetic field generator can be increased. Therefore, the robustness of the position detection device can be enhanced. Therefore, it is possible to increase the change in the magnetic flux as the positional relationship changes.

In addition, the size of the magnet itself can be made smaller than when the magnetic field generating section is configured using one magnet, so that the size of the position detection device can be reduced.

Specifically, according to the fourth aspect, the magnetic detecting element has the first tooth facing the second hole, the first end face facing the first tooth, and the second end face facing the second hole. A sensor signal indicating the first direction as the direction of the magnetic flux is output while facing the two holes.

The magnetic detection element has a first tooth facing the second tooth, a first end face facing the first tooth, and a second end face facing the second tooth. outputs a sensor signal indicative of a second orientation of the .

The magnetic sensing element faces the second hole, the first end face faces the first hole, and the second end face faces the second hole, and is oriented in the second direction. Outputs a sensor signal indicating

The magnetic detection element has a first hole facing the second tooth, a first end face facing the first hole, and a second end face facing the second tooth. outputs a sensor signal indicative of a third orientation of the

The first orientation, the second orientation, and the third orientation are different orientations.

According to a fifth aspect, a power transmission system comprises a dog clutch, the dog clutch comprising a first clutch component and a second clutch component.

The first clutch forming portion is configured to be rotatable about an axis extending in the axial direction when a predetermined direction is defined as the axial direction, and has a first hole portion that is concave on one side in the axial direction and a first hole portion that is convex on the other side in the axial direction. 1 teeth are alternately arranged in the circumferential direction around the axis.

The second clutch component is arranged on the other side in the axial direction with respect to the first clutch component, is configured to be rotatable about the axis, and is located on the one side in the axial direction of the second hole recessed on the other side in the axial direction. The convex second teeth are alternately arranged in the circumferential direction around the axis.

While the drive source rotates the first clutch component about the axis, the actuator moves one of the first clutch component and the second clutch component to the other side to move the first tooth portion into the second hole. and insert the second tooth into the first hole.

As a result, the rotational force output from the drive source is transmitted from the first clutch component to the second clutch component.

The position detection device is arranged radially outward of the first clutch component and the second clutch component with respect to the axis, and has a magnetic field having a first magnetic pole portion and a second magnetic pole portion forming the same polarity as each other. A generator is provided.

The position detection device has a yoke and a magnetic detection element. The yoke has a first end face arranged radially outward about the axis with respect to the first tooth portion or the first hole portion, and allows magnetic flux to pass between the first end face and the first magnetic pole portion. A first magnetic flux path portion is provided.

The yoke has a second end face positioned radially outward about the axis with respect to the second tooth or the second hole, and allows magnetic flux to pass between the second end face and the second magnetic pole portion. A second magnetic flux path portion is provided.

The magnetic detection element is arranged radially outward of the first clutch component and the second clutch component about the axis, and is provided between the first magnetic flux path portion and the second magnetic flux path portion. .

The magnetic detection element generates a composite magnetic flux obtained by synthesizing a first magnetic flux passing between the first clutch forming portion and the first magnetic flux path portion and a second magnetic flux passing between the second clutch forming portion and the second magnetic flux path portion. outputs a sensor signal indicating the orientation of the

The magnetic detection element is rotated about the axis depending on the positional relationship between the first hole and first tooth of the first clutch component and the second hole and second tooth of the second clutch component. A signal indicating the positional relationship is output as a sensor signal by changing the direction of the synthesized magnetic flux.

According to the sixth aspect, the magnetic field generator includes a first magnet including a first magnetic pole portion and a third magnetic pole portion having a polarity different from that of the first magnetic pole portion, a second magnetic pole portion, and the second magnetic pole portion. a second magnet comprising fourth pole pieces having opposite polarities. The third magnetic pole portion and the fourth magnetic pole portion have the same polarity.

Specifically, according to the seventh aspect, the magnetic detecting element has the first tooth facing the second hole, the first end face facing the first tooth, and the second end face facing the second hole. A sensor signal indicating the first direction as the direction of the combined magnetic flux is output while facing the two holes.

The magnetic detection element has a first tooth facing the second tooth, a first end face facing the first tooth, and a second end face facing the second tooth, so that the direction of the synthesized magnetic flux is determined. outputs a sensor signal indicative of a second orientation as .

The magnetic sensing element faces the second hole, the first end face faces the first hole, and the second end face faces the second hole, and is oriented in the second direction. Outputs a sensor signal indicating

The magnetic detecting element has a first hole opposed to the second tooth, a first end surface opposed to the first hole, and a second end surface opposed to the second tooth, and the direction of the synthesized magnetic flux is outputs a sensor signal indicative of a third orientation as .

The first orientation, the second orientation, and the third orientation are different orientations.

According to the eighth aspect, the first magnetic flux path portion is formed so as to move from the one side in the axial direction toward the other side in the axial direction as it goes from the radially inner side to the radially outer side about the axis. have a face.

According to a ninth aspect, the second magnetic flux path portion has a second opposing surface that is formed so as to extend from the other side in the axial direction toward the one side in the axial direction as it goes from the radially inner side to the radially outer side about the axis. According to this, the first magnetic flux path portion has a first opposing surface formed so as to extend from the other side in the axial direction toward the one side in the axial direction as it goes from the radially inner side to the radially outer side about the axis. there is

The second magnetic flux path portion has a second opposing surface formed so as to extend from one side in the axial direction toward the other side in the axial direction as it goes radially outward from the radially inner side about the axis.

According to the tenth aspect, the first magnetic flux path portion includes the first path forming portion extending radially outward from the first end face about the axis, and the magnetic detecting element extending from the first path forming portion. and a first protrusion that protrudes toward.

The second magnetic flux path portion includes: a second path forming portion extending radially outward from the second end surface about the axis; and a protrusion.

Therefore, the magnetic flux passing through the magnetic detecting element can be increased between the first magnetic flux path portion and the second magnetic flux path portion.

According to the eleventh aspect, the first magnetic flux path portion has a first side surface formed on one side in the axial direction and a second side surface formed on the other side in the axial direction. The first side surface is formed such that the distance between the first side surface and the second side surface becomes smaller as it approaches the magnetic detecting element in the radial direction about the axis.

The second magnetic flux path portion has a third side surface formed on one side in the axial direction and a fourth side surface formed on the other side in the axial direction. The fourth side surface is formed such that the distance between the third side surface and the fourth side surface becomes smaller as the magnetic detecting element is approached in the radial direction about the axis.

According to the twelfth aspect, the magnetic detection element is formed to protrude radially inward about the axis from the first end surface and the second end surface.

Therefore, the magnetic sensing element can be arranged at a portion where the direction of the magnetic flux changes greatly with the change in the positional relationship. Therefore, the change in the positional relationship can be detected satisfactorily by the magnetic detection element. Thereby, the robustness of the position detection device can be enhanced.

According to a thirteenth aspect, the position detection device includes a magnetic field generator including a first magnetic pole forming portion and a second magnetic pole forming portion. The first magnetic pole forming portion is arranged radially outward of the clearance about the axis and forms a first end face forming a magnetic pole.

The second magnetic pole forming portion is arranged outside the clearance in the radial direction about the axis and is displaced from the first magnetic pole forming portion in the circumferential direction about the axis to form a magnetic pole. Form two end faces.

The magnetism detecting element is arranged radially outward of the first clutch forming portion and the second clutch forming portion about the axis, and is provided between the first magnetic pole forming portion and the second magnetic pole forming portion to generate a magnetic field. It outputs a sensor signal indicating the direction of the magnetic flux generated by the generator.

The magnetic detection element is rotated about the axis depending on the positional relationship between the first hole and first tooth of the first clutch component and the second hole and second tooth of the second clutch component. By changing the amplitude of the sensor signal, a signal indicating the positional relationship is output as the sensor signal.

According to the fourteenth aspect, the first end surface of the first magnetic pole forming portion and the second end surface of the second magnetic pole forming portion form magnetic poles of the same polarity.

The magnetic flux generated by the magnetic field generator is a composite magnetic flux that combines the first magnetic flux passing between the first end face and the clearance and the second magnetic flux passing between the second end face and the clearance.

According to the fifteenth aspect, the first end face of the first magnetic pole forming portion and the second end face of the second magnetic pole forming portion form magnetic poles with polarities different from each other. The magnetic flux generated by the magnetic field generator is the magnetic flux that passes between the first magnetic pole formation section and the second magnetic pole formation section.

According to the sixteenth aspect, the position detection device is in a state in which the second tooth faces the first hole and the first tooth faces the second hole, based on the amplitude of the sensor signal. An engagement determination unit is provided for determining whether or not.

The position detection device controls the actuator when the engagement determination unit determines that the second tooth faces the first hole and the first tooth faces the second hole. An engagement control section is provided.

The engagement control section controls the actuator to move one of the first clutch constituent section and the second clutch constituent section to the other side to insert the first tooth portion into the second hole and also into the first hole. Insert the second tooth.

According to the seventeenth aspect, the engagement determination section determines whether or not the amplitude of the sensor signal is equal to or less than the threshold value, whereby the second tooth faces the first hole and the first tooth is facing the second hole.

This makes it possible to accurately determine whether or not the second tooth faces the first hole and the first tooth faces the second hole.

According to an eighteenth aspect, the position detection device includes a magnetic field generator having a first magnetic pole forming portion and a second magnetic pole forming portion. The first magnetic pole forming portion is arranged radially outward about the axis with respect to the first tooth portion or the first hole portion, and forms a first end face that forms a magnetic pole. A second magnetic pole forming portion and a second end surface disposed radially outward about the axis with respect to the second tooth or the second hole to form a magnetic pole.

the magnetic detection element is arranged radially outward of the first clutch forming portion and the second clutch forming portion about the axis, and is arranged between the first magnetic pole forming portion and the second magnetic pole forming portion; It outputs a sensor signal indicating the direction of the magnetic flux generated by the magnetic field generator.

The magnetic detection element is rotated about the axis depending on the positional relationship between the first hole and first tooth of the first clutch component and the second hole and second tooth of the second clutch component. The amplitude of the sensor signal changes. As a result, the magnetic detection element outputs a signal indicating the positional relationship as a sensor signal.

According to the nineteenth aspect, the first end surface of the first magnetic pole forming portion and the second end surface of the second magnetic pole forming portion form magnetic poles of the same polarity. The magnetic flux generated by the magnetic field generator includes a first magnetic flux passing between the first clutch forming portion and the first magnetic pole forming portion and a second magnetic flux passing between the second clutch forming portion and the second magnetic pole forming portion. is the composite magnetic flux obtained by synthesizing

According to the twentieth aspect, the first end face of the first magnetic pole forming portion and the second end face of the second magnetic pole forming portion form magnetic poles with polarities different from each other.

The magnetic flux generated by the magnetic field generator is the magnetic flux that passes between the first magnetic pole formation section and the second magnetic pole formation section.

According to the twenty-first aspect, the magnetic detection element includes a detection section that detects the direction of the magnetic flux generated by the magnetic field generation section and outputs a sensor signal.

An imaginary line passing through an intermediate portion between the first clutch component and the second clutch component and extending in a direction orthogonal to the axial direction is defined as the centerline of the first clutch component and the second clutch component.

An imaginary line passing through an intermediate portion between the first magnetic pole forming portion and the second magnetic pole forming portion and extending in a direction orthogonal to the axial direction is defined as the center line of the first magnetic pole forming portion and the second magnetic pole forming portion.

The center lines of the first magnetic pole forming portion and the second magnetic pole forming portion and the detecting portion are shifted to one side or the other side in the axial direction with respect to the center line of the first clutch forming portion and the second clutch forming portion. are placed.

According to the 22nd aspect, the position detection device detects a state in which the second tooth faces the first hole and the first tooth faces the second hole, based on the amplitude of the sensor signal. An engagement determination unit is provided for determining whether or not.

The position detection device controls the actuator when the engagement determination unit determines that the second tooth faces the first hole and the first tooth faces the second hole. An engagement control section is provided.

The engagement control section controls the actuator to move one of the first clutch constituent section and the second clutch constituent section to the other side to insert the first tooth portion into the second hole and also into the first hole. Insert the second tooth.

According to the twenty-third aspect, the position detection device determines whether or not the sensor signal converges to a predetermined value, so that the first tooth enters the second hole and the second tooth enters the first hole. An engagement completion determination unit is provided for determining whether or not the engagement for engaging the tooth is completed.

Thus, using the DC component of the sensor signal, it is possible to accurately determine whether or not the engagement of the first tooth entering the second hole and the second tooth entering the first hole has been completed. can be done.

According to the twenty-fourth aspect, the position detection device determines whether or not the DC component of the sensor signal has converged to a predetermined value. and an engagement completion determination unit that determines whether or not the engagement in which the second tooth enters is completed.

Thus, using the DC component of the sensor signal, it is possible to accurately determine whether or not the engagement of the first tooth entering the second hole and the second tooth entering the first hole has been completed. can be done.

According to the twenty-fifth aspect, the first toothed portion and the second toothed portion are made of a material containing iron, and the first hole and the second hole are exposed to the atmosphere.

1 Power Transmission System 10 Dog Clutch 20 Position Detector 30 Drive Source 40 Actuator 50 Control Device

Claims (25)

A first hole (12b) recessed on one side in the axial direction and a first tooth portion protruding on the other side in the axial direction are configured to be rotatable about an axis extending in the axial direction when a predetermined direction is defined as an axial direction. (12a) are arranged alternately in the circumferential direction around the axis, and the first clutch forming portion (12) is arranged on the other side in the axial direction with respect to the first clutch forming portion, and the axis is aligned. A second hole (11b) recessed on the other side in the axial direction and a second toothed portion (11a) protruding on the one side in the axial direction are configured to be rotatable about the axis in a circumferential direction about the axis. a dog clutch (10) comprising second clutch constituent portions (11) arranged alternately in the
While the drive source (30) rotates the first clutch component about the axis, the actuator (40) moves one of the first clutch component and the second clutch component to the other side. to insert the first tooth portion into the second hole portion, and insert the second tooth portion into the first hole portion, and the rotational force output from the drive source is transferred from the first clutch-constituting portion to the second tooth portion. A position detection device applied to a power transmission system (1) that transmits power to two clutch components,
A first magnetic pole portion (62) and a second magnetic pole portion (61) which are arranged radially outward about the axis with respect to the first clutch forming portion and the second clutch forming portion and form mutually different polarities. a magnetic field generator (60, 60A, 60B, 75) having
a first end surface (72c, 74a) arranged radially outward about the axis with respect to the first tooth portion or the first hole portion, and the first end surface and the first magnetic pole portion; a first magnetic flux path portion (72, 74) for allowing magnetic flux to pass therebetween; a yoke (70) comprising: a second magnetic flux path portion (71, 73) having (71c, 73a) and allowing the magnetic flux to pass between the second magnetic pole portion and the second end face;
arranged radially outward about the axis with respect to the first clutch component and the second clutch component, and provided between the first magnetic flux path portion and the second magnetic flux path portion; a magnetic detection element (80) that outputs a sensor signal indicating the direction of the magnetic flux passing between the first magnetic flux path portion and the second magnetic flux path portion;
The magnetic detection element is configured to rotate in the direction of rotation about the axis, the first hole of the first clutch component, the first tooth and the second hole of the second clutch component, the second A position detecting device that outputs a signal indicating the positional relationship as the sensor signal by changing the direction of the magnetic flux depending on the positional relationship with the two teeth. The magnetic field generator is one magnet (60) having the first magnetic pole portion and the second magnetic pole portion
The position detection device according to claim 1, comprising: The magnetic field generator is
The first magnetic pole part (62) and the third magnetic pole part (6) having a polarity different from that of the first magnetic pole part
1) a first magnet (60A) comprising:
The second magnetic pole part (61) and the fourth magnetic pole part (6) having a polarity different from that of the second magnetic pole part
2) a second magnet (60B) comprising:
a third magnetic flux path portion (75) for passing magnetic flux between the third magnetic pole portion of the first magnet and the fourth magnetic pole portion of the second magnet;
The first magnetic pole portion (62) and the fourth magnetic pole portion (62) have the same polarity,
The position detecting device according to claim 1, wherein the third magnetic pole portion (61) and the second magnetic pole portion (61) have the same polarity. The magnetic detecting element has the first tooth facing the second hole, the first end face facing the first tooth, and the second end face facing the second hole. state, outputting the sensor signal indicating the first direction (B) as the direction of the magnetic flux;
The magnetic detecting element has the first tooth facing the second tooth, the first end face facing the first tooth, and the second end face facing the second tooth. state, outputting the sensor signal indicating the second direction (A) as the direction of the magnetic flux;
The magnetic sensing element has the first hole opposed to the second hole, the first end face opposed to the first hole, and the second end face opposed to the second hole. state, outputting the sensor signal indicating the second orientation;
The magnetic detecting element has the first hole opposed to the second tooth, the first end face opposed to the first hole, and the second end face opposed to the second tooth. state, outputting the sensor signal indicating the third direction (C) as the direction of the magnetic flux;
4. The position detection device according to claim 1, wherein the first orientation, the second orientation, and the third orientation are different orientations. A first hole (12b) recessed on one side in the axial direction and a first tooth portion protruding on the other side in the axial direction are configured to be rotatable about an axis extending in the axial direction when a predetermined direction is defined as an axial direction. (12a) are arranged alternately in the circumferential direction around the axis, and the first clutch forming portion (12) is arranged on the other side in the axial direction with respect to the first clutch forming portion, and the axis is aligned. A second hole (11b) recessed on the other side in the axial direction and a second toothed portion (11a) protruding on the one side in the axial direction are configured to be rotatable about the axis in a circumferential direction about the axis. a dog clutch (10) comprising second clutch constituent portions (11) arranged alternately in the
With the drive source (30) rotating the first clutch component around the axis,
An actuator (40) moves one of the first clutch constituent portion and the second clutch constituent portion to the other side to insert the first tooth portion into the second hole and the A position detection device applied to a power transmission system (1) for transmitting a rotational force output from the drive source by inserting a second tooth portion from the first clutch constituent portion to the second clutch constituent portion,
A first magnetic pole portion (61, 62) and a second magnetic pole portion (61, 62) arranged radially outward about the axis with respect to the first clutch forming portion and the second clutch forming portion and forming the same polarity. magnetic field generators (60A, 60B, 75) having (61, 62);
having a first end face (74a) arranged radially outward about the axis with respect to the first tooth portion or the first hole portion, and between the first end face and the first magnetic pole portion; and a second end face (73a) arranged radially outward about the axis with respect to the second tooth or the second hole. a yoke (70) comprising a second magnetic flux path portion (73) for passing magnetic flux between the second end surface and the second magnetic pole portion;
arranged radially outward about the axis with respect to the first clutch component and the second clutch component, and provided between the first magnetic flux path portion and the second magnetic flux path portion; A direction of a combined magnetic flux obtained by synthesizing a first magnetic flux passing between the first clutch forming part and the first magnetic flux path part and a second magnetic flux passing between the second clutch forming part and the second magnetic flux path part A magnetic detection element (80) that outputs a sensor signal indicating
The magnetic detection element is configured to rotate in the direction of rotation about the axis, the first hole of the first clutch component, the first tooth and the second hole of the second clutch component, the second A position detecting device that outputs a signal indicating the positional relationship as the sensor signal by changing the direction of the synthesized magnetic flux depending on the positional relationship with the two teeth. The magnetic field generator is
a first magnet (60A) comprising the first magnetic pole portion and third magnetic pole portions (61, 62) having polarities different from the first magnetic pole portion;
a second magnet (60B) comprising the second magnetic pole portion and fourth magnetic pole portions (61, 62) having polarities different from the second magnetic pole portion;
The position detection device according to claim 5, wherein the third magnetic pole portions (61, 62) and the fourth magnetic pole portions (61, 62) have the same polarity. The magnetic detecting element has the first tooth facing the second hole, the first end face facing the first tooth, and the second end face facing the second hole. state, outputting the sensor signal indicating the first direction (E, H) as the direction of the combined magnetic flux;
The magnetic detecting element has the first tooth facing the second tooth, the first end face facing the first tooth, and the second end face facing the second tooth. state, outputting the sensor signal indicating the second direction (D, G) as the direction of the combined magnetic flux;
The magnetic sensing element has the first hole opposed to the second hole, the first end face opposed to the first hole, and the second end face opposed to the second hole. state, outputting the sensor signal indicating the second orientation;
The magnetic detecting element has the first hole opposed to the second tooth, the first end face opposed to the first hole, and the second end face opposed to the second tooth. state, outputting the sensor signal indicating the third direction (F, I) as the direction of the combined magnetic flux;
7. The position detection device according to claim 5, wherein the first orientation, the second orientation, and the third orientation are different orientations. The first magnetic flux path portion is a first opposing surface (74b, 72d),
The second magnetic flux path portion is formed so as to extend from the other side in the axial direction toward the one side in the axial direction as it goes from the radially inner side to the radially outer side about the axis line (73b, 71d). The first magnetic flux path portion is a first opposing surface (74b) formed so as to extend from the other side in the axial direction toward the one side in the axial direction as it goes from the radially inner side to the radially outer side about the axis. has
The second magnetic flux path portion is a second opposing surface (73b) formed so as to extend from the one side in the axial direction toward the other side in the axial direction as it goes from the radially inner side to the radially outer side about the axis. The position detection device according to any one of claims 1 to 7, comprising: The first magnetic flux path portion includes: a first path forming portion (74e) formed from the first end surface to the outside in a radial direction about the axis; A first projecting portion (74d) that is convex toward the
The second magnetic flux path portion includes: a second path forming portion (73e) formed from the second end surface to the outside in a radial direction about the axis; 8. The position detecting device according to any one of claims 1 to 7, further comprising a second projecting portion (73d) that protrudes toward. The first magnetic flux path portion includes a first side surface (78a) formed on one side in the axial direction,
a second side surface (78b) formed on the other side in the axial direction,
The first side surface is formed such that the distance between the first side surface and the second side surface decreases as the magnetic sensing element is approached in a radial direction about the axis,
The second magnetic flux path portion includes a third side surface (79b) formed on one side in the axial direction,
a fourth side surface (79a) formed on the other side in the axial direction,
8. The fourth side surface is formed such that the distance between the third side surface and the fourth side surface decreases as the magnetic detecting element is approached in a radial direction about the axis. The position detection device according to any one of the above. 12. The position detecting device according to any one of claims 1 to 11, wherein the magnetic detection element is formed so as to project radially inward about the axis from the first end face and the second end face. A first hole (12b) recessed on one side in the axial direction and a first tooth portion protruding on the other side in the axial direction are configured to be rotatable about an axis extending in the axial direction when a predetermined direction is defined as an axial direction. (12a) are arranged alternately in the circumferential direction around the axis, and the other side of the axial direction with respect to the first clutch constituent portion via a clearance (13). A second hole (11b) recessed on the other side in the axial direction and a second toothed portion (11a) protruding on the one side in the axial direction are arranged so as to be rotatable about the axis. a dog clutch (10) comprising second clutch forming portions (11) arranged alternately in a circumferential direction about the axis;
While the drive source (30) rotates the first clutch component about the axis, the actuator (40) moves one of the first clutch component and the second clutch component to the other side. to insert the first tooth portion into the second hole portion, and insert the second tooth portion into the first hole portion, and the rotational force output from the drive source is transferred from the first clutch-constituting portion to the second tooth portion. A position detection device applied to a power transmission system (1) that transmits power to two clutch components,
a first magnetic pole forming portion (73) disposed radially outwardly of the clearance centered on the axis and forming a first end face (73a) forming a magnetic pole; A second magnetic pole that is arranged radially outwardly from the center and that is displaced from the first magnetic pole forming portion in the circumferential direction around the axis and forms a second end face (74a) that forms a magnetic pole. a magnetic field generator (70) comprising a forming portion (74);
arranged radially outward about the axis with respect to the first clutch forming portion and the second clutch forming portion and provided between the first magnetic pole forming portion and the second magnetic pole forming portion; a magnetic detection element (80) that outputs a sensor signal indicating the direction of the magnetic flux generated by the magnetic field generator,
The magnetic detection element is configured to rotate in the direction of rotation about the axis, the first hole of the first clutch component, the first tooth and the second hole of the second clutch component, the second A position detecting device that outputs a signal indicating the positional relationship as the sensor signal by changing the amplitude of the sensor signal depending on the positional relationship with the two teeth. the first end face of the first magnetic pole forming portion and the second end face of the second magnetic pole forming portion form magnetic poles of the same polarity;
The magnetic flux generated by the magnetic field generator is a combination of a first magnetic flux passing between the first end face and the clearance and a second magnetic flux passing between the second end face and the clearance. 14. The position detecting device according to claim 13, which is magnetic flux. the first end face of the first magnetic pole forming portion and the second end face of the second magnetic pole forming portion form magnetic poles with polarities different from each other;
14. The position detecting device according to claim 13, wherein the magnetic flux generated by the magnetic field generating section is magnetic flux passing between the first magnetic pole forming section and the second magnetic pole forming section. Based on the amplitude of the sensor signal, it is determined whether or not the second tooth faces the first hole and the first tooth faces the second hole. An engagement determination unit (S100) is provided,
When the engagement determination unit determines that the second tooth faces the first hole and the first tooth faces the second hole, the actuator is controlled. Then, one of the first clutch forming portion and the second clutch forming portion is moved to the other side to insert the first tooth portion into the second hole portion, and the second tooth portion is inserted into the first hole portion. an engagement control unit (S130) for inserting the
The position detection device according to any one of claims 13, 14 and 15, comprising: The engagement determination unit determines whether or not the amplitude of the sensor signal is equal to or less than a threshold, so that the second tooth faces the first hole and the first tooth faces the second hole. 17. The position detecting device according to claim 16, wherein it is determined whether or not it is facing the hole. A first hole (12b) recessed on one side in the axial direction and a first tooth portion protruding on the other side in the axial direction are configured to be rotatable about an axis extending in the axial direction when a predetermined direction is defined as an axial direction. (12a) are arranged alternately in the circumferential direction around the axis, and the first clutch forming portion (12) is arranged on the other side in the axial direction with respect to the first clutch forming portion, and the axis is aligned. A second hole (11b) recessed on the other side in the axial direction and a second toothed portion (11a) protruding on the one side in the axial direction are configured to be rotatable about the axis in a circumferential direction about the axis. a dog clutch (10) comprising second clutch constituent portions (11) arranged alternately in the
While the drive source (30) rotates the first clutch component about the axis, the actuator (40) moves one of the first clutch component and the second clutch component to the other side. to insert the first tooth portion into the second hole portion, and insert the second tooth portion into the first hole portion, and the rotational force output from the drive source is transferred from the first clutch-constituting portion to the second tooth portion. A position detection device applied to a power transmission system (1) that transmits power to two clutch components,
a first magnetic pole forming portion (73) disposed radially outward about the axis with respect to the first tooth portion or the first hole portion and forming a first end face (73a) forming a magnetic pole; a second magnetic pole forming portion (74) disposed radially outward about the axis with respect to the second tooth portion or the second hole portion and forming a second end face (74a) forming a magnetic pole; a magnetic field generator (70) having
arranged radially outward about the axis with respect to the first clutch forming portion and the second clutch forming portion, and arranged between the first magnetic pole forming portion and the second magnetic pole forming portion; A magnetic detection element (80) that outputs a sensor signal indicating the direction of the magnetic flux generated by the magnetic field generation unit,
The magnetic detection element is configured to rotate in the direction of rotation about the axis, the first hole of the first clutch component, the first tooth and the second hole of the second clutch component, the second A position detecting device that outputs a signal indicating the positional relationship as the sensor signal by changing the amplitude of the sensor signal depending on the positional relationship with the two teeth. the first end face of the first magnetic pole forming portion and the second end face of the second magnetic pole forming portion form magnetic poles of the same polarity;
The magnetic flux generated by the magnetic field generating portion passes between the first magnetic flux passing between the first clutch forming portion and the first magnetic pole forming portion and the second clutch forming portion and the second magnetic pole forming portion. 19. The position detecting device according to claim 18, wherein the magnetic flux is a composite magnetic flux obtained by synthesizing the second magnetic flux. the first end face of the first magnetic pole forming portion and the second end face of the second magnetic pole forming portion form magnetic poles with polarities different from each other;
19. The position detecting device according to claim 18, wherein the magnetic flux generated by the magnetic field generating section is magnetic flux passing between the first magnetic pole forming section and the second magnetic pole forming section. The magnetic detection element includes a detection section (82) that detects the direction of the magnetic flux generated by the magnetic field generation section and outputs the sensor signal,
An imaginary line extending in a direction perpendicular to the axial direction passing through an intermediate portion between the first clutch-forming portion and the second clutch-forming portion is defined as the center of the first clutch-forming portion and the second clutch-forming portion. Let the line (Z) be
An imaginary line extending in a direction orthogonal to the axial direction passing through an intermediate portion between the first magnetic pole forming portion and the second magnetic pole forming portion is defined as the center of the first magnetic pole forming portion and the second magnetic pole forming portion. When the line (T) is
The center line of the first magnetic pole forming portion and the second magnetic pole forming portion and the detecting portion are arranged in one direction of the axial direction with respect to the center line of the first clutch forming portion and the second clutch forming portion. 21. The position detection device according to any one of claims 18, 19 and 20, wherein the position detection device is arranged to be shifted to one side or the other side. Based on the amplitude of the sensor signal, it is determined whether or not the second tooth faces the first hole and the first tooth faces the second hole. An engagement determination unit (S100A) is provided,
When the engagement determination unit determines that the second tooth faces the first hole and the first tooth faces the second hole, the actuator is controlled. Then, one of the first clutch forming portion and the second clutch forming portion is moved to the other side to insert the first tooth portion into the second hole portion, and the second tooth portion is inserted into the first hole portion. an engagement control unit (S130) for inserting the
The position detection device according to any one of claims 18 to 21, comprising: By determining whether or not the sensor signal has converged to a predetermined value, the engagement of the first tooth entering the second hole and the second tooth entering the first hole is completed. 23. The position detection device according to claim 22, further comprising an engagement completion determination section (S140A) that determines whether or not the engagement has been completed. By determining whether or not the DC component of the sensor signal has converged to a predetermined value, the first tooth enters the second hole and the second tooth enters the first hole. 23. The position detection device according to claim 22, further comprising an engagement completion determination section (S140A) that determines whether or not engagement is completed. The first tooth portion and the second tooth portion are made of a material containing iron,
25. The position detecting device according to claim 1, wherein said first hole and said second hole are exposed to the atmosphere.

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