JP7070366B2 - Power transmission device - Google Patents

Description

The disclosure by this specification relates to a power transmission device.

As a power transmission device that transmits power from the input shaft portion to the output shaft portion, for example, Patent Document 1 describes a park lock mechanism that shifts between a locked state and an unlocked state of the output shaft portion of a transmission mounted on a vehicle. Is disclosed. This park lock mechanism has a gear, a park pole, a detent lever, a motor and a detent spring. The gear is fixed to the output shaft portion of the transmission, and the park pole can be moved to a locked position that meshes with the gear and prevents the rotation of the output shaft portion. The detent lever is connected to both the park pole and the motor, and rotates with the drive of the motor, and moves the park pole to the locked position with the rotation. When the park pole is in the locked position, the roller of the detent spring is in the recess of the detent lever. In this case, the detent spring prevents the detent lever from rotating, whereby the output shaft portion of the transmission is held in a locked state.

Japanese Unexamined Patent Publication No. 2016-21165

However, in Patent Document 1, the motor that rotates the detent lever is a dedicated motor for locking the output shaft portion of the speed change shaft, and is provided at a position separated from the output shaft portion. Further, the detent spring that prevents the rotation of the detent lever is a dedicated member for holding the output shaft portion in a locked state, and is provided at a position separated from the output shaft portion. As described above, in Patent Document 1, since it is necessary to secure the installation space of the motor and the installation space of the detent spring at a position separated from the output shaft portion, there is a concern that the power transmission device becomes large.

A main object of the present disclosure is to provide a power transmission device capable of switching a mode of power transmission from an input shaft portion to an output shaft portion and further reducing the size.

In order to achieve the above object, the disclosed first aspect is
A power transmission device (20) that transmits power from the input shaft portion to the output shaft portion so that the output shaft portion (15) rotates together with the input shaft portion (14) that is rotated by the power of the power source (11). ,
A rotating body (21) that rotates together with the first shaft portion (14), which is one of the input shaft portion and the output shaft portion, and regulates the rotation of the first shaft portion by being caught by a predetermined receiving member (61). The rotation restriction position (P) to be applied and the first shaft portion and the second shaft portion and the second shaft portion by being caught on the second shaft portion (15) of the input shaft portion and the output shaft portion, which is not the first shaft portion, without being caught on the receiving member. A rotating body (21) that can be moved to a rotating position (D, R) that rotates both of the shaft portions, and a rotating body (21) that can be moved to.
A motion conversion unit (24, 31a) that converts the rotational motion of the input shaft portion into a straight motion in which the rotating body travels straight along the first shaft portion so that the rotating body moves between the rotation restricted position and the rotation position.
Equipped with
The rotating body is a power transmission device that extends in a cylindrical shape along the outer peripheral surface of the first shaft portion and is provided coaxially with the first shaft portion at both the rotation restriction position and the rotation position.

According to the first aspect, when the rotating body provided on the first shaft portion is in the rotating position, the rotating body is in a state of being caught on the second shaft portion, so that the input shaft is driven by the power of the power source. The output shaft part rotates together with the part. On the other hand, when the rotating body is in the rotation restricted position, the rotating body is caught by the receiving member, so that the output shaft portion does not rotate depending on the power of the power source. Therefore, the power transmission device can be switched between a state in which the output shaft portion rotates and a state in which the output shaft portion does not rotate, simply by moving the rotating body between the rotation position and the rotation restriction position.

Moreover, the rotating body is coaxial with the first shaft portion at both the rotation restricted position and the rotation position. Therefore, it is necessary to arrange the configuration in which the rotating body is hooked on the second shaft portion and the configuration in which the rotating body is hooked on the receiving member at a position separated from the first shaft portion and the second shaft portion in the radial direction of the first shaft portion. There is no. Therefore, in the power transmission device, it is possible to switch the mode of transmitting power from the input shaft portion to the output shaft portion, and further, it is possible to reduce the size of the power transmission device.

The second aspect is
A power transmission device (20) that transmits power from the input shaft portion to the output shaft portion so that the output shaft portion (15) rotates together with the input shaft portion (14) that is rotated by the power of the power source (11). ,
A rotating body (21) that rotates together with the first shaft portion (14), which is one of the input shaft portion and the output shaft portion, and regulates the rotation of the first shaft portion by being caught by a predetermined receiving member (61). The rotation restriction position (P) to be applied and the first shaft portion and the second shaft portion and the second shaft portion by being caught on the second shaft portion (15) of the input shaft portion and the output shaft portion, which is not the first shaft portion, without being caught on the receiving member. Rotational positions (D, R) that rotate both shafts, and a rotating body (21) that is relatively movable with respect to the first shaft.
A motion conversion unit (24, 31a) that converts the rotational motion of the input shaft portion into a straight motion in which the rotating body travels straight along the first shaft portion so that the rotating body moves between the rotation position and the rotation restriction position.
It is a power transmission device equipped with.

According to the second aspect, similarly to the first aspect, simply moving the rotating body to the rotation restricting position and the rotation position causes the power transmission device to have a state in which the output shaft portion rotates and a state in which the output shaft portion does not rotate. Can be switched to.

Moreover, the motion conversion unit converts the rotational motion of the input shaft section into the linear motion of the rotating body. In this configuration, since the rotating body moves between the rotation restricted position and the rotating position by rotating the input shaft portion, it is not necessary to provide a dedicated power source such as a dedicated motor for moving the rotating body in the power transmission device. .. Therefore, similarly to the first aspect, it is possible to reduce the size of the power transmission device while realizing the power transmission device capable of switching the transmission mode of the power from the input shaft portion to the output shaft portion.

The third aspect is
A power transmission device (20) that transmits power from the input shaft portion to the output shaft portion so that the output shaft portion (15) rotates together with the input shaft portion (14) that is rotated by the power of the power source (11). ,
A rotating body (21) that rotates together with the first shaft portion (14), which is one of the input shaft portion and the output shaft portion, and is the second of the input shaft portion and the output shaft portion, which is not the first shaft portion. The connection position (D, P, R) connected to the shaft portion (15) and the connection disconnection position (N) from which the connection with the second shaft portion is disconnected are relative to the first shaft portion. A movable rotating body (21) and
A motion conversion unit (24, 31a) that converts the rotational motion of the input shaft portion into a straight motion in which the rotating body travels straight along the first shaft portion so that the rotating body moves to the connection position and the connection disconnection position.
Equipped with
The rotating body is a power transmission device that extends in a cylindrical shape along the outer peripheral surface of the first shaft portion and is provided coaxially with the first shaft portion at both the rotation restriction position and the rotation position.

According to the third aspect, when the rotating body is in the connection position, the rotating body provided on the first shaft portion is caught on the second shaft portion, so that the output shaft portion rotates together with the input shaft portion by the power of the power source. do. On the other hand, when the rotating body is in the disconnection position, the rotating body provided on the first shaft portion does not get caught on the second shaft portion, so that even if one of the first shaft portion and the second shaft portion rotates, the other Does not rotate. That is, even if the input shaft portion is rotated by the power of the power source, the output shaft portion does not rotate. Therefore, by simply moving the rotating body between the connection position and the connection disconnection position, the power transmission device can be switched between a state in which the output shaft portion rotates and a state in which the output shaft portion does not rotate.

Moreover, as in the first aspect, since the rotating body is coaxial with the first shaft portion in both the rotation restriction position and the rotation position, the power transmission mode from the input shaft portion to the output shaft portion can be changed. While realizing a power transmission device that can be switched, it is possible to reduce the size of this power transmission device.

The fourth aspect is
A power transmission device (20) that transmits power from the input shaft portion to the output shaft portion so that the output shaft portion (15) rotates together with the input shaft portion (14) that is rotated by the power of the power source (11). ,
A rotating body (21) that rotates together with the first shaft portion (14), which is one of the input shaft portion and the output shaft portion, and is the second of the input shaft portion and the output shaft portion, which is not the first shaft portion. The connection position (D, R, P) connected to the shaft portion (15) and the connection disconnection position (N) from which the connection with the second shaft portion is disconnected are relative to the first shaft portion. A movable rotating body (21) and
A motion conversion unit (24, 31a) that converts the rotational motion of the input shaft portion into a straight motion that goes straight along the first shaft portion so that the rotating body moves between the connection position and the connection disconnection position.
It is a power transmission device equipped with.

According to the fourth aspect, similarly to the third aspect, simply moving the rotating body to the connection position and the connection disconnection position causes the power transmission device to have a state in which the output shaft portion rotates and a state in which the output shaft portion does not rotate. Can be switched to.

Moreover, as in the second aspect, since the rotational motion of the input shaft portion is converted into the linear motion of the rotating body by the motion conversion unit, it is possible to switch the mode of transmitting power from the input shaft portion to the output shaft portion. It is possible to reduce the size of this power transmission device while realizing a power transmission device that can be used.

It should be noted that the scope of claims and the reference numerals in parentheses described in this section merely indicate the correspondence with the specific means described in the embodiments described later, and do not limit the technical scope of the present disclosure. not.

The schematic diagram which shows the structure of the drive system in 1st Embodiment. A cross-sectional view in the axial direction showing the configuration of a displacement rotating body. FIG. 2 is a sectional view taken along line III-III of FIG. A cross-sectional view in the axial direction showing the configuration of the first fixing member. FIG. 4 is a sectional view taken along line VV of FIG. Sectional drawing in the axial direction which shows the structure of the 2nd fixing member. FIG. 6 is a sectional view taken along line VII-VII of FIG. FIG. 6 is a sectional view taken along line VIII-VIII of FIG. A cross-sectional view in the axial direction showing the configuration of the brake device. FIG. 9 is a sectional view taken along line XX of FIG. FIG. 9 is a sectional view taken along line XI-XI of FIG. A cross-sectional view in a direction orthogonal to the axial direction showing the positional relationship between the displacement rotating body and the fixed rotating body when the displacement rotating body is in the drive position. A cross-sectional view in a direction orthogonal to the axial direction showing the positional relationship between the displacement rotating body and the fixed rotating body when the displacement rotating body is in the reverse position. A cross-sectional view in a direction orthogonal to the axial direction showing the positional relationship between the displacement rotating body and the fixed rotating body when the displacement rotating body is in the parking position. The figure which shows the relationship between the rotation direction of an input shaft part, and the movement direction of a displacement rotating body when the displacement rotating body is in a neutral position. The figure which shows the position of the displacement rotating body when the displacement rotating body reaches the drive position. The figure which shows the relationship of the rotation direction of an input shaft part and an output shaft part when a displacement rotating body is in a drive position. The figure which shows the relationship between the rotation direction of an input shaft part, and the movement direction of a displacement rotating body when the displacement rotating body is in a neutral position. The figure which shows the position of the displacement rotating body when the displacement rotating body reaches the reverse position. The figure which shows the relationship of the rotation direction of an input shaft part and an output shaft part when a displacement rotating body is in a reverse position. The figure which shows the position of the displacement rotating body when the displacement rotating body reaches a parking position. A flowchart showing the procedure of the range switching process. The schematic diagram which shows the structure of the drive system in 2nd Embodiment.

Hereinafter, a plurality of embodiments of the present disclosure will be described with reference to the drawings. By assigning the same reference numerals to the corresponding components in each embodiment, duplicate description may be omitted. When only a part of the configuration is described in each embodiment, the configuration of the other embodiment described above can be applied to the other parts of the configuration. Further, not only the combination of the configurations specified in the description of each embodiment but also the configurations of a plurality of embodiments can be partially combined even if the combination is not specified. Further, an unspecified combination of the configurations described in the plurality of embodiments and modifications is also disclosed by the following description.

(First Embodiment)
The drive system 10 shown in FIG. 1 is mounted on an electric vehicle as a vehicle. The drive system 10 includes a drive motor 11, a transmission 12, an input shaft unit 14, an output shaft unit 15, a power transmission device 20, and an ECU 70. The drive motor 11 is a rotary electric machine such as a motor generator, and is a power source for operating a vehicle. The drive motor 11 can drive the vehicle along with the drive thereof, and corresponds to an electric drive drive source.

The transmission 12 is a device that transmits the power output from the drive motor 11 to the axle as a rotational driving force. The transmission 12 converts the rotation speed of the drive motor 11 into a desired rotation speed, and rotates the axle according to the converted rotation speed. The transmission 12 is an automatic transmission, a continuously variable transmission, or the like.

The input shaft portion 14 is connected to the drive motor 11 and rotates with the drive of the drive motor 11. The output shaft portion 15 is connected to the transmission 12 and rotates the axle via the transmission 12. The input shaft portion 14 and the output shaft portion 15 are arranged in series. The center line CL of the input shaft portion 14 and the center line of the output shaft portion 15 coincide with each other, and the input shaft portion 14 and the output shaft portion 15 rotate about any of the center line CLs.

In the present embodiment, as shown in FIGS. 1 and 3, the direction in which the center line CL of the input shaft portion 14 extends is referred to as the axial direction α, and the direction in which the virtual straight line orthogonal to the center line CL extends is referred to as the radial direction β. , The direction extending along the center line CL is referred to as the circumferential direction γ. The axial direction α, the radial direction β, and the circumferential direction γ are orthogonal to each other. Further, in the axial direction α, the input shaft portion 14 side may be referred to as an input side, and the output shaft portion 15 side may be referred to as an output side.

The power transmission device 20 transmits the power of the drive motor 11 to the transmission 12. The power transmission device 20 is provided between the drive motor 11 and the transmission 12 in the path where power is transmitted. The power transmission device 20 is connected to the drive motor 11 via the input shaft portion 14 and is connected to the transmission 12 via the output shaft portion 15. When the input shaft portion 14 rotates with the drive of the drive motor 11, the power transmission device 20 supplies power from the input shaft portion 14 to the output shaft portion 15 so that the output shaft portion 15 rotates together with the input shaft portion 14. introduce.

The power transmission device 20 can shift to a connection state in which the input shaft portion 14 and the output shaft portion 15 are connected and a connection disconnection state in which the connection between the input shaft portion 14 and the output shaft portion 15 is disconnected. .. When the power transmission device 20 is in the connected state, the output shaft portion 15 rotates with the rotation of the input shaft portion 14. In this case, it can be said that the power transmission device 20 is in a transmission state in which power is transmitted from the input shaft portion 14 to the output shaft portion 15. When the power transmission device 20 is in the disconnected state, the output shaft portion 15 does not rotate even if the input shaft portion 14 rotates. In this case, it can be said that the power transmission device 20 is in a non-transmission state in which power is not transmitted from the input shaft portion 14 to the output shaft portion 15.

The power transmission device 20 can shift to an input restricting state that regulates the rotation of the input shaft portion 14 and an input permitting state that permits the rotation of the input shaft portion 14. The power transmission device 20 is also in a connected state when the input is restricted. In this case, the power transmission device 20 also regulates the rotation of the output shaft portion 15 by regulating the rotation of the input shaft portion 14.

The power transmission device 20 has a displacement rotating body 21, a fixed rotating body 22, and a braking device 24.

The displacement rotating body 21 extends along the center line CL and is formed in a cylindrical shape such as a cylinder as a whole. The displacement rotating body 21 is attached to the input shaft portion 14 and is relatively displaceable with respect to the input shaft portion 14. The displacement rotating body 21 is provided on the outer peripheral side of the input shaft portion 14, and extends along the outer peripheral surface of the input shaft portion 14. The center line of the displacement rotating body 21 coincides with the center line CL of the input shaft portion 14. That is, the displacement rotating body 21 is provided coaxially with the input shaft portion 14. In this case, the input shaft portion 14 is inserted into the displacement rotating body 21. The input shaft portion 14 corresponds to the first shaft portion, the output shaft portion 15 corresponds to the second shaft portion, and the displacement rotating body 21 corresponds to a rotating body that rotates together with the first shaft portion. Further, the displacement rotating body 21 can also be referred to as a shift member.

The fixed rotating body 22 extends along the center line CL and is formed in a cylindrical shape such as a cylinder as a whole. The fixed rotating body 22 is attached to the output shaft portion 15 and is fixed to the output shaft portion 15 by welding or the like so as not to be displaced relative to the output shaft portion 15. The fixed rotating body 22 is provided side by side on the output shaft portion 15 in the axial direction α, and is fixed to the input side end portion of the output shaft portion 15. The center line of the fixed rotating body 22 coincides with the center line of the output shaft portion 15. The displacement rotating body 21 can be hooked on the fixed rotating body 22, and when the displacement rotating body 21 is caught on the fixed rotating body 22, the fixed rotating body 22 rotates together with the displacement rotating body 21. Since the fixed rotating body 22 is integrated with the output shaft portion 15, the displacement rotating body 21 is caught on the output shaft portion 15 when the displacement rotating body 21 is caught on the fixed rotating body 22. Corresponds to the state.

The power transmission device 20 shifts to a connection state and a connection disconnection state when the displacement rotating body 21 is displaced relative to the input shaft portion 14. The displacement rotating body 21 is movable between a connection position connected to the fixed rotating body 22 and a connection disconnection position where the connection with the fixed rotating body 22 is disconnected. The power transmission device 20 is in the connected state when the displacement rotating body 21 is in the connection position, and is in the connection disconnecting state when the displacement rotating body 21 is in the disconnection position. The connection position and the connection disconnection position are arranged in the axial direction α as relative positions with respect to the input shaft portion 14. When the displacement rotating body 21 is in the connection position, the output shaft portion 15 rotates together with the input shaft portion 14. Therefore, in the displacement rotating body 21, the connection position corresponds to the rotating position.

Further, the power transmission device 20 shifts to the input restricting state and the input permitting state due to the displacement of the displacement rotating body 21. The displacement rotating body 21 can shift to an input restricted position that restricts the rotation of the input shaft portion 14 and an input permitted position that permits the rotation of the input shaft portion 14. The power transmission device 20 is in the input restricted state when the displacement rotating body 21 is in the input restricted position, and is in the input permitted state when the displacement rotating body 21 is in the input permitted position. The input restriction position and the input permission position are arranged in the axial direction α as relative positions with respect to the input shaft portion 14. When the displacement rotating body 21 is in the input restricting position, the rotation of the input shaft portion 14 is restricted. Therefore, in the displacement rotating body 21, the input restricted position corresponds to the rotation restricted position.

The displacement rotating body 21 is coaxial with the input shaft portion 14 regardless of which of the connection position, the connection disconnection position, the rotation position, the rotation restriction position, the input restriction position, and the input permission position.

The displacement rotating body 21 is displaced when the shift lever as the operating lever is operated by the driver. The displacement rotating body 21 can move to the drive position D, the reverse position R, the parking position P, and the neutral position N according to the shift position of the shift lever. The drive position D, the reverse position R, the parking position P, and the neutral position N are arranged in the axial direction α as relative positions to the input shaft portion 14. The power transmission device 20 and the transmission 12 have a drive range, a reverse range, a parking range, and a neutral range as the shift range of the vehicle. The drive position D, the reverse position R, the parking position P, and the neutral position N correspond to each of the drive range, the reverse range, the parking range, and the neutral range.

The connection position of the displacement rotating body 21 includes the drive position D and the reverse position R. When the displacement rotating body 21 is in the drive position D or the reverse position R, the input shaft portion 14 and the output shaft portion 15 are connected to each other, so that the output shaft portion 15 rotates together with the input shaft portion 14. As described above, the drive position D and the reverse position R also correspond to the input permission position.

The input shaft portion 14 and the output shaft portion 15 rotate in a direction for advancing the vehicle when the displacement rotating body 21 is at the drive position D. The shaft portions 14 and 15 rotate in a direction in which the vehicle is retracted when the displacement rotating body 21 is in the reverse position R. The rotation directions of the shaft portions 14 and 15 are opposite depending on whether the displacement rotating body 21 is at the drive position D or the reverse position R. The rotation of the shaft portions 14 and 15 when the displacement rotating body 21 is at the drive position D is referred to as forward rotation, and the rotation of the shaft portions 14 and 15 when the displacement rotating body 21 is at the reverse position R is referred to as reverse rotation.

The neutral position N is included in the connection disconnection position of the displacement rotating body 21. When the displacement rotating body 21 is in the neutral position N, the connection between the input shaft portion 14 and the output shaft portion 15 is disconnected, so that the output shaft portion 15 rotates even if the input shaft portion 14 rotates. do not. As described above, the neutral position N also corresponds to the input permission position. On the other hand, when the displacement rotating body 21 is in the neutral position N, the rotation of the output shaft portion 15 is not restricted.

The input restricted position of the displacement rotating body 21 includes the parking position P. When the displacement rotating body 21 is at the parking position P, the rotation of the input shaft portion 14 is restricted. Further, when the displacement rotating body 21 is at the parking position P, the input shaft portion 14 and the output shaft portion 15 are connected to each other. That is, the parking position P corresponds to the input restriction position and the connection position of the displacement rotating body 21. Therefore, when the displacement rotating body 21 is at the parking position P, the rotation of both the input shaft portion 14 and the output shaft portion 15 is restricted.

As described above, the drive position D and the reverse position R correspond to the connection position and the input permission position, the neutral position N corresponds to the connection disconnection position and the input permission position, and the parking position P corresponds to the connection position and the input restriction position. .. As described above, the drive position D and the reverse position R correspond to the rotation position, and the parking position P corresponds to the rotation restriction position.

As shown in FIGS. 2 and 3, the displacement rotating body 21 has a displacement base portion 31, a displacement catching portion 32, and a displacement groove portion 33.

The displacement base portion 31 is a cylindrical member such as a cylindrical member, and forms an inner peripheral surface of the displacement rotating body 21. The inner peripheral surface of the displacement base portion 31 and the outer peripheral surface of the input shaft portion 14 face each other. In this facing portion, the input shaft portion 14 is provided with a male screw portion 14a, and the displacement base portion 31 is provided with a female screw portion 31a. The displacement base portion 31 is screwed to the input shaft portion 14 by engaging the male screw portion 14a and the female screw portion 31a with each other. Therefore, the displacement rotating body 21 rotates relative to the input shaft portion 14 and thus moves relative to the input shaft portion 14 in the axial direction α. For example, when the input shaft portion 14 rotates in a positive direction while the displacement rotating body 21 does not rotate, the displacement rotating body 21 moves in a direction approaching the output shaft portion 15 in the axial direction α. On the other hand, when the input shaft portion 14 rotates in the reverse direction while the displacement rotating body 21 does not rotate, the displacement rotating body 21 moves in a direction away from the output shaft portion 15 in the axial direction α.

The displacement catching portion 32 is a convex portion extending radially outward from the outer peripheral surface of the displacement base portion 31. The displacement catching portion 32 is a portion that is hooked on the fixed rotating body 22 or the brake case 61 (see FIG. 1) described later of the braking device 24. A plurality of displacement hooking portions 32 are arranged at predetermined intervals in the circumferential direction γ. For example, three displacement hooking portions 32 are provided at equal intervals in the circumferential direction γ. Each displacement hooking portion 32 is provided at the output side end portion of the displacement base portion 31. In addition, only one displacement hooking portion 32 may be provided.

The displacement groove portion 33 is a recess provided on the outer peripheral surface of the displacement base portion 31. The displacement groove portion 33 extends in a groove shape in the axial direction α. The displacement groove portion 33 extends from the input side end portion of the displacement base portion 31 toward the output side end portion. A plurality of displacement groove portions 33 are arranged at predetermined intervals in the circumferential direction γ in the displacement base portion 31. For example, two displacement groove portions 33 are provided. In the axial direction α, the length dimensions of these displacement groove portions 33 are the same as each other. It should be noted that only one displacement groove portion 33 may be provided. The displacement groove portion 33 may penetrate the outer peripheral portion of the displacement base portion 31 in the radial direction β.

As shown in FIG. 1, the displacement rotating body 21 enters the inside of the fixed rotating body 22 from the open portion on the input shaft portion 14 side of the fixed rotating body 22. The fixed rotating body 22 has a first fixing member 40 and a second fixing member 50. These fixing members 40 and 50 are each formed in a cylindrical shape as a whole, and are fixed to each other by welding or the like.

The first fixing member 40 is a member that is caught by the displacement rotating body 21 when the displacement rotating body 21 is at the drive position D. The second fixing member 50 is a member that is caught by the displacement rotating body 21 when the displacement rotating body 21 is at the reverse position R and the parking position P. The fixing members 40 and 50 are arranged in the axial direction α, and the center lines of the fixing members 40 and 50 coincide with the rotation axis of the output shaft portion 15. The first fixing member 40 is provided between the output shaft portion 15 and the second fixing member 50 in the axial direction α. The first fixing member 40 is fixed to the input side end of the output shaft portion 15 by welding or the like, and the second fixing member 50 is fixed to the input side end of the first fixing member 40 by welding or the like. ..

As shown in FIGS. 4 and 5, the first fixing member 40 has a first base portion 41, a first hooking portion 42, and a first bottom portion 43.

The first base portion 41 is a cylindrical member such as a cylindrical member, and forms an inner peripheral surface of the first fixing member 40. The output side end portion of the displacement rotating body 21 can enter the inside of the first base portion 41.

The first hooking portion 42 is a convex portion extending inward in the radial direction from the inner peripheral surface of the first base portion 41. The first hooking portion 42 is a portion that is hooked on the displacement hooking portion 32 of the displacement rotating body 21 in the circumferential direction γ. A plurality of first hooking portions 42 are arranged at predetermined intervals in the circumferential direction γ. For example, three first hooking portions 42 are provided at equal intervals in the circumferential direction γ.

In the circumferential direction γ, the separation distance L2 of the adjacent first hooking portions 42 is slightly larger than the length dimension L1 of the displacement hooking portions 32. In this configuration, with the displacement hooking portion 32 inserted between the adjacent first hooking portions 42, the separation distance between the displacement hooking portion 32 and the first hooking portion 42 in the circumferential direction γ is as small as possible. In this case, when the input shaft portion 14 starts rotating, the displacement hooking portion 32 comes into contact with the first hooking portion 42 at a timing when the rotation speed of the input shaft portion 14 is still small. Therefore, the impact when the displacement hooking portion 32 comes into contact with the first hooking portion 42 tends to be small, and it is possible to prevent the hooking portions 32, 42 from being deformed or damaged.

The first bottom portion 43 forms an output side end surface of the first fixing member 40, and is provided between the first base portion 41 and the output shaft portion 15. The first bottom portion 43 forms the bottom surface of the first fixing member 40. The first hooking portion 42 extends from the first bottom portion 43 toward the second fixing member 50 in the axial direction α. The first hooking portion 42 is separated from both the input side end portion and the output side end portion in the axial direction α between the input side end portion and the output side end portion of the first base portion 41 in the axial direction α. It is installed in the position where it was set.

When the displacement rotating body 21 is at the drive position D, the displacement hooking portion 32 is in a state of being inserted between the first hooking portions 42 adjacent to each other in the circumferential direction γ. In this case, the output side end of the displacement rotating body 21 comes into contact with the first bottom portion 43, so that the displacement rotating body 21 is prevented from moving to the output side of the drive position D by the first bottom portion 43.

As shown in FIGS. 6, 7, and 8, the second fixing member 50 has a second base portion 51, a second hooking portion 52, and a third hooking portion 54.

The second base portion 51 is a cylindrical member such as a cylindrical member, and forms an inner peripheral surface of the second fixing member 50. The output side end portion of the displacement rotating body 21 can enter the inside of the second base portion 51.

The second hooking portion 52 is a convex portion extending inward in the radial direction from the inner peripheral surface of the second base portion 51. The second hooking portion 52 is a portion that is hooked on the displacement hooking portion 32 of the displacement rotating body 21 in the circumferential direction γ. A plurality of second hooking portions 52 are arranged at predetermined intervals in the circumferential direction γ. Six second hooking portions 52 are provided at equal intervals in the circumferential direction γ, for example.

In the circumferential direction γ, the separation distance L3 of the adjacent second hooking portions 52 is slightly larger than the length dimension L1 of the displacement hooking portion 32. In this configuration, the displacement hooking portion 32 is inserted between the adjacent second hooking portions 52, and the separation distance between the displacement hooking portion 32 and the second hooking portion 52 in the circumferential direction γ is as small as possible. In this case, when the input shaft portion 14 starts rotating, the displacement hooking portion 32 comes into contact with the second hooking portion 52 at a timing when the rotation speed of the input shaft portion 14 is still small. Therefore, the impact when the displacement hooking portion 32 comes into contact with the second hooking portion 52 tends to be small, and it is possible to prevent the hooking portions 32 and 52 from being deformed or damaged.

Like the second hooking portion 52, the third hooking portion 54 is a convex portion extending radially inward from the inner peripheral surface of the second base portion 51. The third hooking portion 54 is a portion that is hooked on the displacement hooking portion 32 of the displacement rotating body 21 in the circumferential direction γ. A plurality of third hooking portions 54 are arranged at predetermined intervals in the circumferential direction γ. For example, three third hooking portions 54 are provided at equal intervals in the circumferential direction γ.

In the circumferential direction γ, the separation distance L4 of the adjacent third hooking portions 54 is slightly larger than the length dimension L1 of the displacement hooking portion 32. In this configuration, with the displacement hooking portion 32 inserted between the adjacent third hooking portions 54, the separation distance between the displacement hooking portion 32 and the third hooking portion 54 in the circumferential direction γ is as small as possible. In this case, when the input shaft portion 14 starts rotating, the displacement hooking portion 32 comes into contact with the third hooking portion 54 at a timing when the rotation speed of the input shaft portion 14 is still small. Therefore, the impact when the displacement hooking portion 32 comes into contact with the third hooking portion 54 tends to be small, and it is possible to prevent the hooking portions 32 and 54 from being deformed or damaged.

In the fixed rotating body 22, the separation distance L2 of the adjacent first hooking portions 42, the separation distance L3 of the adjacent second hooking portions 52, and the separation distance L4 of the adjacent third hooking portions 54 are the same. There is. The separation distances L2 to L4 may be different from each other.

The third hooking portion 54 is provided on the input side of the second hooking portion 52 in the axial direction α. The third hooking portion 54 forms an input side end surface of the second fixing member 50. The second hooking portion 52 extends from the third hooking portion 54 toward the output side in the axial direction α. The second hooking portion 52 is separated from both the input side end portion and the output side end portion in the axial direction α between the input side end portion and the output side end portion of the second base portion 51 in the axial direction α. It is installed in the position where it was set. The third hooking portion 54 is passed over to two second hooking portions 52 adjacent to each other in the circumferential direction γ among the plurality of second hooking portions 52. In this case, one third hooking portion 54 is provided for each of the two second hooking portions 52. Further, the second hooking portion 52 does not protrude from the third hooking portion 54 in the circumferential direction γ.

When the displacement rotating body 21 is in the reverse position R, the displacement hooking portion 32 is inserted between the pair of the second hooking portions 52 to which the third hooking portion 54 is crossed among the plurality of second hooking portions 52. It has become. In this case, when the input side end of the displacement rotating body 21 comes into contact with the output side end of the third hooking portion 54, the displacement rotating body 21 moves to the input side from the reverse position R, which is the third hooking portion. It is blocked by 54.

On the other hand, when the displacement rotating body 21 is at the parking position P, the displacement hooking portion 32 is in a state of being inserted between the third hooking portions 54 adjacent to each other in the circumferential direction γ. Unlike the first fixing member 40, the second fixing member 50 does not have a bottom portion, and the internal space of the second fixing member 50 is open toward both the input side and the output side. When the displacement rotating body 21 is at the parking position P, the displacement rotating body 21 is in a state of protruding toward the input side from the input side end portion of the second base portion 51.

As shown in FIG. 1, when the displacement rotating body 21 is in the neutral position N, the displacement hooking portion 32 is any of the first hooking portion 42, the second hooking portion 52, and the third hooking portion 54 inside the fixed rotating body 22. It doesn't get caught. In the fixed rotating body 22, the first hooking portion 42 and the second hooking portion 52 are separated from each other in the axial direction α, and this separation distance becomes larger than the length dimension of the displacement hooking portion 32 in the axial direction α. There is. Therefore, when the displacement rotating body 21 is in the neutral position N, the displacement rotating body 21 rotates relative to the fixed rotating body 22. In this case, even if the displacement rotating body 21 rotates together with the input shaft portion 14, the fixed rotating body 22 and the output shaft portion 15 do not rotate. That is, the power transmission device 20 does not transmit power from the input shaft portion 14 to the output shaft portion 15.

As shown in FIGS. 1 and 9, the brake device 24 includes a brake case 61, a brake stator 62, a brake rotor 63, a braking portion 64, a bearing portion 65, and an oil seal 66. The brake case 61, the rotor 63, the braking portion 64, the bearing portion 65, and the oil seal 66 are all formed in a cylindrical shape such as a cylindrical shape as a whole, and the center line of each is the center line CL of the input shaft portion 14. Match. In FIG. 9, the bearing portion 65 and the oil seal 66 are not shown.

The brake case 61 houses a brake stator 62, a brake rotor 63, a braking portion 64, a bearing portion 65, an oil seal 66, and the like. The brake case 61 is attached to the vehicle body or the vehicle frame by welding or the like. As shown in FIGS. 9 and 10, the brake case 61 has a case hole 61a extending along the center line of the brake case 61, and is formed in a cylindrical shape such as a cylinder as a whole. The brake case 61 extends along the center line CL of the input shaft portion 14. The center line of the brake case 61 coincides with the center line CL. The diameter of the case hole 61a is larger than the outer diameter of the displacement base portion 31. The input shaft portion 14 and the displacement rotating body 21 are inserted through the case hole 61a.

The brake case 61 is a member that is caught by the displacement rotating body 21 when the displacement rotating body 21 is at the drive position D. The brake case 61 has a case receiving portion 61b that receives the displacement catching portion 32 of the displacement rotating body 21. The case receiving portion 61b is a recess provided on the output side end surface of the brake case 61. The case receiving portion 61b extends from the output side end surface of the brake case 61 toward the input side, and extends radially outward from the inner peripheral surface of the brake case 61. A plurality of case receiving portions 61b are arranged at predetermined intervals in the circumferential direction γ. For example, three case receiving portions 61b are provided at equal intervals in the circumferential direction γ. The inner surface of the case receiving portion 61b includes a pair of receiving wall surfaces 61c facing each other in the circumferential direction γ, and a receiving bottom surface 61d facing the output side in the axial direction α. In a state where the displacement catching portion 32 has entered the inside of the case receiving portion 61b, the displacement catching portion 32 is caught on the receiving wall surface 61c in the circumferential direction γ. The brake case 61 forms a receiving wall surface 61c and corresponds to a receiving member.

In the circumferential direction γ, the length dimension L5 of the case receiving portion 61b is slightly larger than the length dimension L1 of the displacement hooking portion 32. The length dimension L5 is a separation distance between the pair of receiving wall surfaces 61c. In this configuration, in a state where the displacement hooking portion 32 has entered the inside of the case receiving portion 61b, the separation distance between the displacement catching portion 32 and the receiving wall surface 61c in the circumferential direction γ is as small as possible. In this case, when the input shaft portion 14 starts rotating, the displacement catching portion 32 comes into contact with the receiving wall surface 61c at a timing when the rotation speed of the input shaft portion 14 is still small. Therefore, the impact when the displacement catching portion 32 comes into contact with the receiving wall surface 61c tends to be small, and it is possible to prevent the displacement catching portion 32 and the brake case 61 from being deformed or damaged.

The length dimension L5 of the case receiving portion 61b is the same as the separation distances L2 to L4 of the fixed rotating body 22. The length dimension L5 may be different from the separation distances L2 to L4.

When the displacement rotating body 21 is at the parking position P, the displacement catching portion 32 is in a state of being inserted inside the case receiving portion 61b. In this case, the input side end of the displacement rotating body 21 comes into contact with the receiving bottom surface 61d of the brake case 61, so that the displacement rotating body 21 is prevented from moving to the input side from the parking position P by the receiving bottom surface 61d. ..

In FIG. 9, the brake stator 62 is fixed to the brake case 61. The brake stator 62 can also be referred to as a stator. The brake stator 62 has a coil as a stator winding. The coil is connected to the power supply unit and is energized with the supply of AC power from the power supply unit to generate a magnetic field. The brake stator 62 may have a core such as an iron core around which the coil is wound.

As shown in FIG. 9, the brake rotor 63 is provided inside the brake stator 62 and is rotatable about the center line of the brake stator 62. The brake rotor 63 is attached to the displacement rotating body 21 in a state where it can both move relative to the displacement rotating body 21 in the axial direction α and rotate together with the displacement rotating body 21. The brake rotor 63 is provided on the outer peripheral side of the displacement rotating body 21 as a whole, and is coaxial with the displacement rotating body 21.

As shown in FIG. 11, the brake rotor 63 has a rotor base portion 63a, an outer protrusion 63b, and an inner protrusion 63c. The rotor base portion 63a is formed in a cylindrical shape. The rotor base portion 63a is provided on the outer peripheral side of the displacement base portion 31, and extends along the outer peripheral surface of the displacement base portion 31. The rotor base portion 63a is provided coaxially with the displacement base portion 31. In this case, the displacement base portion 31 is inserted into the rotor base portion 63a.

The outer protruding portion 63b is a convex portion extending radially outward from the outer peripheral surface of the rotor base portion 63a. The outer protrusion 63b is an annular plate portion such as an annular plate. The outer protrusion 63b is located at a position separated in the axial direction α from both the input side end portion and the output side end portion between the input side end portion and the output side end portion of the rotor base portion 63a in the axial direction α. It is provided in. Only one outer protrusion 63b is provided with respect to the rotor base 63a. A plurality of outer protrusions 63b may be provided with respect to the rotor base portion 63a. For example, a plurality of outer protrusions 63b may be arranged in the circumferential direction γ, or a plurality of outer protrusions 63b may be arranged in the axial direction α. Further, the outer protrusion 63b does not have to be annular.

The inner protruding portion 63c is a convex portion extending radially inward from the inner peripheral surface of the rotor base portion 63a. The inner protruding portion 63c is a portion that can enter the displacement groove portion 33 of the displacement rotating body 21 and is caught in the displacement groove portion 33 in the circumferential direction γ while entering the inside of the displacement groove portion 33. A plurality of inner protrusions 63c are arranged at predetermined intervals in the circumferential direction γ. For example, two inner protrusions 63c are provided at equal intervals in the circumferential direction γ. Each inner protrusion 63c extends in an elongated shape in the axial direction α. In the axial direction α, the length dimension of the inner protrusion 63c is smaller than the length dimension of the displacement groove portion 33. Therefore, the inner protruding portion 63c can move in the axial direction α relative to the displacement groove portion 33 in a state where the inner protruding portion 63c has entered the inside of the displacement groove portion 33. The inner protrusion 63c extends in a spline shape, and the inner protrusion 63c can also be referred to as a spline.

As shown in FIGS. 1 and 9, the braking unit 64 has a magnetic viscous fluid (Magneto Rheological Fluid) and an accommodating unit accommodating the magnetic viscous fluid. The ferrofluid is a fluid whose apparent viscosity changes according to the amount of magnetic force applied, and the ferrofluid can also be referred to as MRF. The brake device 24 is an MRF brake capable of regulating the rotation of the brake rotor 63 using a ferrofluid. The braking portion 64 is provided between the brake stator 62 and the brake rotor 63 in the radial direction β. The outer protrusion 63b of the brake rotor 63 is inserted inside the braking portion 64, and the ferrofluid can apply the brake torque to the outer protrusion 63b. In the brake device 24, the amount of energization applied to the brake stator 62 increases or decreases, so that the brake torque applied to the outer protrusion 63b from the ferrofluid increases or decreases.

Regarding the brake device 24, a state in which the braking unit 64 regulates the rotation of the brake rotor 63 is referred to as a braking state, and a state in which the braking unit 64 does not restrict the rotation of the brake rotor 63 is referred to as a braking release state. The braking state is a state in which the braking torque of the braking portion 64 is large enough to regulate the rotation of the brake rotor 63. The braking release state is a state in which the brake torque of the braking portion 64 does not regulate the rotation of the brake rotor 63. As described above, since the inner protruding portion 63c of the brake rotor 63 is caught in the displacement groove portion 33 of the displacement rotating body 21, when the braking device 24 is in the braking state, the rotation of the displacement rotating body 21 is also damped.

The bearing portion 65 is attached to the brake case 61 and rotatably supports the brake stator 62. The bearing portion 65 is provided at each of the input side end portion and the output side end portion with respect to the brake case 61. These bearing portions 65 are separated from each other in the axial direction α. The oil seal 66 seals a gap between members so that oil such as lubricating oil does not leak to the outside of the brake device 24. The oil seal 66 is provided between the bearing portion 65 and the braking portion 64 in the axial direction α. A bearing portion 65 may be provided between the braking portion 64 and the oil seal 66 in the axial direction α.

In the drive system 10, the displacement rotating body 21 is screwed into the input shaft portion 14 as described above. Therefore, when the braking device 24 brakes the rotation of the displacement rotating body 21 and the rotation speed of the displacement rotating body 21 per unit time becomes smaller than the rotation speed of the input shaft portion 14, the rotational movement of the input shaft portion 14 is performed. , The displacement rotating body 21 is converted into a translational motion that translates in the axial direction α. This translational motion corresponds to a linear motion in which the displacement rotating body 21 goes straight in the axial direction α. In the power transmission device 20, the female screw portion 31a of the displacement rotating body 21 and the brake device 24 form a motion conversion unit that converts the rotational motion of the input shaft portion 14 into the linear motion of the displacement rotating body 21. From the viewpoint of the drive system 10, in addition to the female screw portion 31a of the displacement rotating body 21 and the brake device 24, the male screw portion 14a of the input shaft portion 14 constitutes the motion conversion unit.

When the rotation of the displacement rotating body 21 is restricted by shifting the braking device 24 to the braking state, the rotational motion of the input shaft portion 14 is forcibly converted into the translational motion of the displacement rotating body 21. On the other hand, when the braking device 24 is in the braking release state, the rotation of the displacement rotating body 21 is not damped, and the rotational motion of the input shaft portion 14 is not converted into the translational motion of the displacement rotating body 21. The braking state of the brake device 24 corresponds to the conversion forced state for forcing the motion conversion by the motion conversion unit, and the braking release state corresponds to the conversion release state for forcing the motion conversion by the motion conversion unit. Further, the brake device 24 corresponds to the conversion compulsory unit.

When the displacement rotating body 21 is at any of the drive position D, the reverse position R and the neutral position N, and the braking device 24 is in the braking release state, the brake stator 62 and the displacement rotating body 21 rotate together with the input shaft portion 14. .. In this case, the brake device 24 does not regulate the rotation of the brake stator 62, thereby not restricting the rotation of the displacement rotating body 21. On the other hand, when the brake device 24 is in the braking state, the rotation of the brake stator 62 is slower with respect to the input shaft portion 14 together with the rotation of the displacement rotating body 21. In this case, the brake device 24 regulates the rotation of the displacement rotating body 21 by restricting the rotation of the brake stator 62. The displacement rotating body 21 corresponds to a driving rotating body, and the brake stator 62 corresponds to a driven rotating body that rotates according to the driving rotating body.

The positions N, D, R, and P where the displacement rotating body 21 can move are arranged in the order of drive position D, neutral position N, reverse position R, and parking position P from the input side to the output side. As described above, the neutral position N is arranged between the drive position D and the reverse position R in the axial direction α. In order for the displacement rotating body 21 to move to any of the drive position D, the reverse position R and the parking position P, it is necessary to pass through the neutral position N. For example, when the displacement rotating body 21 moves from the reverse position R to the parking position P, the displacement rotating body 21 moves from the reverse position R toward the output side to reach the neutral position N, and then moves from the neutral position N to the input side. Reach the parking position P. On the other hand, when moving from the drive position D to the reverse position R, by moving from the drive position D toward the output side, the reverse position R is reached through the neutral position N.

Here, the relationship between the position of the displacement rotating body 21 and the rotation direction of the input shaft portion 14 will be described with reference to FIGS. 12 to 22. In FIGS. 15 to 22, the drive motor 11, the transmission 12, and the ECU 70 are not shown.

When the input shaft portion 14 rotates relative to the displacement rotating body 21 due to the braking device 24 being in the braking state, when the input shaft portion 14 rotates in the forward direction, the displacement rotating body 21 moves toward the output side. .. On the other hand, in this case, when the input shaft portion 14 rotates in the reverse direction, the displacement rotating body 21 moves toward the input side. Therefore, as shown in FIG. 15, when the braking device 24 is in the braking state and the input shaft portion 14 rotates in the forward direction, the displacement rotating body 21 can move from the neutral position N to the drive position D as shown in FIG. It has become. Further, as shown in FIG. 18, when the braking device 24 is in the braking state and the input shaft portion 14 rotates in the reverse direction, the displacement rotating body 21 moves from the neutral position N to the reverse position R as shown in FIGS. 19 and 21. Alternatively, it can be moved to the parking position P.

As shown in FIG. 12, when the displacement rotating body 21 is at the drive position D, the displacement hooking portion 32 is in a state of being inserted between the first hooking portions 42 adjacent to each other in the circumferential direction γ. The angle of the displacement rotating body 21 in this case is referred to as a drive angle. For example, a reference angle is set for the displacement rotating body 21, and the difference between the reference angle and the actual angle of the displacement rotating body 21 is used as the drive angle. If the reference angle and the actual angle of the displacement rotating body 21 are the same, the drive angle is zero degree. Further, in this case, as shown in FIGS. 16 and 17, the output side end surface of the displacement rotating body 21 can come into contact with the first bottom portion 43 of the fixed rotating body 22.

As shown in FIG. 13, when the displacement rotating body 21 is in the reverse position R, the displacement hooking portion 32 is adjacent to the circumferential direction γ and is sandwiched between the two second hooking portions 52 to which the third hooking portion 54 is crossed. Is in a state of being intruded. The angle of the displacement rotating body 21 in this case is referred to as a reverse angle. For example, the reverse angle is set to zero degrees, which is the same as the drive angle. Further, in this case, as shown in FIGS. 19 and 20, the input side end surface of the displacement rotating body 21 can come into contact with the output side end surface of the third hooking portion 54 of the fixed rotating body 22.

In the fixed rotating body 22, the first hooking portion 42 and the second hooking portion 52 are provided at positions overlapping in the axial direction α. In other words, the space between the first hooking portions 42 adjacent to each other in the circumferential direction γ and the space between the second hooking portions 52 adjacent to each other in the circumferential direction γ are arranged in the axial direction α. This indicates that the drive angle and the reverse angle are the same value. Therefore, the displacement rotating body 21 can reach the reverse position R through the neutral position N by moving to the input side as it is without rotating from the drive position D.

As shown in FIG. 14, when the displacement rotating body 21 is at the parking position P, the displacement hooking portion 32 is in a state of being inserted between the third hooking portions 54 adjacent to each other in the circumferential direction γ. The angle of the displacement rotating body 21 in this case is referred to as a parking angle. For example, the parking angle is set to 60 degrees with respect to the reference angle. Further, in this case, as shown in FIG. 22, the output side end portion of the displacement rotating body 21 can come into contact with the receiving bottom surface 61d of the brake case 61.

The third hooking portion 54 is provided at a position deviated from the first hooking portion 42 and the second hooking portion 52 in the circumferential direction γ. In other words, the space between the first hooking portions 42 adjacent to the circumferential direction γ and the space between the second hooking portions 52 adjacent to the circumferential direction γ are axially α with respect to the third hooking portion 54. They are lined up. That is, for the displacement rotating body 21, the parking angle is different from the drive angle and the reverse angle. Therefore, after reaching the neutral position N from the drive position D or the reverse position R, the displacement rotating body 21 rotates at the neutral position N so as to be a parking angle from the drive angle or the reverse angle. Then, the displacement rotating body 21 reaches the neutral position N by moving toward the input side in this state at a neutral angle.

In the drive system 10, the input shaft portion 14, the output shaft portion 15, and the fixed rotating body 22 are provided in a state where they are not displaced in the axial direction α. Therefore, even if the displacement rotating body 21 is only screwed into the input shaft portion 14, it is possible to regulate that the displacement rotating body 21 moves in the axial direction α with the start of rotation of the input shaft portion 14. , The displacement rotating body 21 starts rotating together with the input shaft portion 14. In other words, if the displacement rotating body 21 is not regulated to move in the axial direction α, a difference may occur between the rotation of the input shaft portion 14 and the rotation of the displacement rotating body 21. For example, when the rotation of the input shaft portion 14 is started, the displacement rotating body 21 may start the rotation at a rotation speed slower than that of the input shaft portion 14. The relationship between the rotation direction of the input shaft portion 14 and the traveling direction of the displacement rotating body 21 is defined by the screwing direction between the male screw portion 14a and the female screw portion 31a.

As shown in FIGS. 12 and 17, when the displacement rotating body 21 is in the drive position D and the braking device 24 is in the braking release state, when the input shaft portion 14 rotates in the normal direction, the input shaft portion 14 becomes the displacement rotating body. It will rotate in the direction to move 21 to the output side. In this case, the output side end surface of the displacement rotating body 21 is pressed against the first bottom portion 43 of the fixed rotating body 22, and the displacement rotating body 21 is restricted from translating toward the output side. As a result, the displacement rotating body 21 rotates positively together with the input shaft portion 14, and the fixed rotating body 22 and the output shaft portion 15 rotate positively together with the displacement rotating body 21. The first bottom portion 43 corresponds to the straight-ahead restricting portion, and regulates the straight-ahead motion of the displacement rotating body 21 from the drive position D.

As shown in FIGS. 13 and 20, when the displacement rotating body 21 is in the reverse position R and the braking device 24 is in the braking release state, when the input shaft portion 14 rotates in the reverse direction, the input shaft portion 14 becomes the displacement rotating body. It will rotate in the direction to move 21 to the input side. In this case, the input side end surface of the displacement rotating body 21 is pressed against the output side end surface of the third hooking portion 54 of the fixed rotating body 22, and the displacement rotating body 21 is restricted from translating toward the input side. As a result, the displacement rotating body 21 rotates in the reverse direction together with the input shaft portion 14, and the fixed rotating body 22 and the output shaft portion 15 rotate in the reverse direction together with the displacement rotating body 21. The third catching portion 54 corresponds to the straight-moving restricting portion, and regulates the straight-moving motion of the displacement rotating body 21 from the reverse position R.

As shown in FIGS. 14 and 21, when the displacement rotating body 21 is in the parking position P and the brake device 24 is in the braking release state, when the input shaft portion 14 tries to rotate in the reverse direction, the input shaft portion 14 is displaced. It tries to rotate in the direction of moving the rotating body 21 to the input side. In this case, the input side end surface of the displacement rotating body 21 is pressed against the receiving bottom surface 61d of the brake case 61, and the displacement rotating body 21 is restricted from moving in translation toward the input side. Further, in this case, the displacement hooking portion 32 of the displacement rotating body 21 is caught on the receiving wall surface 61c of the brake case 61, and the displacement rotating body 21 is restricted from rotating in the reverse direction. As a result, the reverse rotation of the input shaft portion 14 is restricted by the case receiving portion 61b of the brake case 61. The receiving wall surface 61c of the brake case 61 corresponds to the straight-line restricting portion, and regulates the straight-line movement of the displacement rotating body 21 from the parking position P.

Returning to the description of FIG. 1, the ECU 70 is a control device that controls the operation of the drive system 10. The ECU 70 is electrically connected to the drive motor 11, the transmission 12, and the brake device 24. The ECU 70 controls the operation of the drive motor 11, the transmission 12, and the brake device 24 by outputting a command signal. Various sensors such as a shift sensor for detecting the operation mode of the shift lever are electrically connected to the ECU 70, and the detection signals of these sensors are input. The ECU 70 performs a range switching process for switching the shift range of the power transmission device 20 for the drive system 10. The range switching process is a coordinated control process for the ECU 70 to coordinate and adjust the drive motor 11 and the brake device 24.

The ECU 70 is a "control device" such as an electronic control unit. The "control device" is also referred to as a computer or microcomputer. The "control device" provides a control system for controlling a controlled object. At least one function herein is provided by at least one "control device" configured to provide that function. "Control device" includes at least hardware. The "control device" may include software recorded on a storage medium. A "control unit" may be provided by hardware only. The "control device" is provided by a plurality of logics called if-the-else format, or a trained model tuned by machine learning, for example, a neural network.

At least one function in this specification is provided by at least one "control device". A "control device" may include a plurality of "control devices" linked by a data communication device. The "control device" includes (1) the case where the hardware achieves the above function by executing software, (2) the case where the above function is achieved by the hardware, and (3) the above part (1). Including the case where the above function is achieved by the combination with the above part (2).

The control unit and method thereof described in this disclosure may be realized by (1) a dedicated computer constituting a processor programmed to perform one or more functions embodied by a computer program. .. Alternatively, the control unit and its method described in this disclosure may be realized by (2) a dedicated hardware logic circuit. Alternatively, the control unit and its method described in this disclosure are realized by (3) one or more dedicated computers configured by a combination of a processor that executes a computer program and one or more hardware logic circuits. May be good. Further, the computer program may be stored in a computer-readable non-transitional tangible recording medium as an instruction executed by the computer.

An example of a "control device" is a computer comprising at least a memory containing a program and at least one processor executing the program. In this case, the computer includes at least one processor core called a CPU: Central Processing Unit, a GPU: Graphics Processing Unit, or the like. Memory is also called a storage medium. Memory is a non-transitional and substantive storage medium that stores "programs and / or data" that can be read by a processor non-temporarily. The storage medium is provided by a semiconductor memory, a magnetic disk, an optical disk, or the like. The program may be distributed by itself or as a storage medium in which the program is stored.

An example of a "control device" is a computer that includes a digital circuit or an analog circuit that includes a large number of logic units. In this case, the computer is called a logic circuit array, for example, ASIC: Application-Specific Integrated Circuit, FPGA: Field Programmable Gate Array, PGA: Programmable Gate Array, CPLD: Complex Programmable Logic Device, and the like. Digital circuits may include memory that stores "programs and / or data."

The term hardware processor refers to (1) a processor core that reads and executes a computer program, (2) a logic circuit array that includes an ASIC, FPGA, etc., or (3) a combination of (1) and (2) above. include.

The "control device", the signal source, and the controlled object provide various elements. At least some of those elements can be called blocks for performing functions. From another point of view, at least some of those elements can be referred to as modules or sections that are interpreted as a configuration. Further, the elements included in the control system can also be called means for realizing the function only when it is intentional.

Next, the range switching process performed by the ECU 70 will be described with reference to the flowchart of FIG. The ECU 70 repeatedly executes the range switching process at predetermined intervals.

In FIG. 12, in step S101, it is determined whether or not to switch the shift range of the power transmission device 20. Here, using various signals input to the ECU 70, it is determined whether or not the shift position of the shift lever has been changed, and it is determined that the shift range is switched when the shift position is changed, and the shift position is changed. If not, it is judged that the shift range is not switched.

When changing the shift position, the process proceeds to step S102, and the shift range is switched to the neutral range. Here, the displacement rotating body 21 is moved to the neutral position N by performing coordinated control between the drive motor 11 and the brake device 24. For example, when the displacement rotating body 21 is in the drive position D, the drive motor 11 is rotated in the reverse direction and the brake device 24 is moved to the braking state, and the displacement rotating body 21 is moved from the drive position D to the neutral position N. When the displacement rotating body 21 is in the reverse position R or the parking position P, the drive motor 11 is rotated forward and the braking device 24 is shifted to the braking state, and the displacement rotating body 21 is moved to the reverse position R or the parking position P. Move from to neutral position N. In either case, the braking device 24 is changed from the braking state to the braking release state when the displacement rotating body 21 reaches the neutral position N. This prevents the displacement rotating body 21 from unintentionally moving from the neutral position N to the reverse position R, the drive position D, and the parking position P.

In step S103, it is determined whether or not to switch the shift range to the drive range. Here, it is determined whether or not the shift position of the shift lever has been changed to the position corresponding to the drive range, and when the shift position is changed to the position corresponding to the drive range, it is determined to switch the shift range to the drive range. ..

When switching to the drive range, the process proceeds to step S104, and the displacement rotating body 21 is set to the drive angle. Here, with the brake device 24 kept in the de-braking state, the drive motor 11 is driven to rotate the input shaft portion 14 together with the displacement rotating body 21 so that the angle of the displacement rotating body 21 becomes the drive angle.

In step S105, the displacement rotating body 21 is held at a drive angle. Here, when the displacement rotating body 21 rotates and reaches the drive angle, the braking device 24 is shifted from the braking release state to the braking state.

In step S106, the displacement rotating body 21 is moved to the drive position D. Here, with the brake device 24 kept in the braking state, the drive motor 11 is driven to rotate the input shaft portion 14 in the forward direction, and the displacement rotating body 21 is moved from the neutral position N toward the output side to the drive position. Reach D.

In step S107, the angle holding of the displacement rotating body 21 that has reached the drive position D is released. Here, when the displacement rotating body 21 reaches the drive position D, the brake device 24 shifts from the braking state to the braking release state. In this case, the input shaft portion 14 rotates in the forward direction as the drive motor 11 is driven, so that the fixed rotating body 22 and the output shaft portion 15 rotate in the forward direction together with the displacement rotating body 21.

If the drive range is not switched, the process proceeds to step S108 to determine whether or not to switch the shift range to the reverse range. Here, it is determined whether or not the shift position of the shift lever has been changed to the position corresponding to the reverse range, and when the shift position is changed to the position corresponding to the reverse range, it is determined to switch the shift range to the reverse range. ..

When switching to the reverse range, the process proceeds to step S109, and the displacement rotating body 21 is set to the reverse angle. Here, with the brake device 24 kept in the de-braking state, the drive motor 11 is driven to rotate the input shaft portion 14 together with the displacement rotating body 21 so that the angle of the displacement rotating body 21 becomes the reverse angle.

In step S110, the displacement rotating body 21 is held at a reverse angle. Here, when the displacement rotating body 21 rotates and reaches the reverse angle, the braking device 24 is shifted from the braking release state to the braking state.

In step S111, the displacement rotating body 21 is moved to the reverse position R. Here, with the brake device 24 kept in the braking state, the drive motor 11 is driven to rotate the input shaft portion 14 in the forward direction, and the displacement rotating body 21 is moved from the neutral position N toward the output side to the reverse position. Reach R.

In step S112, the angle holding of the displacement rotating body 21 that has reached the reverse position R is released. Here, when the displacement rotating body 21 reaches the reverse position R, the brake device 24 shifts from the braking state to the braking release state. In this case, the input shaft portion 14 rotates in the reverse direction as the drive motor 11 is driven, so that the fixed rotating body 22 and the output shaft portion 15 rotate in the reverse direction together with the displacement rotating body 21.

If neither the drive range nor the reverse range is switched, the process proceeds to step S113, and it is determined whether or not to switch the shift range to the parking range. Here, it is determined whether or not the shift position of the shift lever has been changed to the position corresponding to the parking range, and when the shift position is changed to the position corresponding to the parking range, it is determined to switch the shift range to the parking range. ..

When switching to the parking range, the process proceeds to step S114, and the displacement rotating body 21 is set to the parking angle. Here, with the brake device 24 kept in the de-braking state, the drive motor 11 is driven to rotate the input shaft portion 14 together with the displacement rotating body 21 so that the angle of the displacement rotating body 21 becomes the parking angle.

In step S115, the displacement rotating body 21 is held at a parking angle. Here, when the displacement rotating body 21 rotates and reaches the parking angle, the braking device 24 is shifted from the braking release state to the braking state.

In step S116, the displacement rotating body 21 is moved to the parking position P. Here, with the brake device 24 kept in the braking state, the drive motor 11 is driven to rotate the input shaft portion 14 in the forward direction, and the displacement rotating body 21 is moved from the neutral position N toward the output side to the parking position. Reach P.

In step S117, the angle holding of the displacement rotating body 21 that has reached the parking position P is released. Here, when the displacement rotating body 21 reaches the parking position P, the brake device 24 shifts from the braking state to the braking release state. In this case, the unintentional rotation of the input shaft portion 14 is restricted by the displacement rotating body 21 being caught by the brake case 61.

When the angle of the displacement rotating body 21 reaches the drive angle, the reverse angle, or the parking angle, the brake device 24 may be moved to the braking state after the drive motor 11 is stopped, and the drive motor 11 is not stopped. The brake device 24 may be shifted to the braking state. Further, when the displacement rotating body 21 reaches the drive position D, the reverse position R, and the parking position P, the brake device 24 may be shifted to the braking release state after the drive motor 11 is stopped. Further, the brake device 24 may be shifted to the braking release state without stopping the drive motor 11.

According to the present embodiment described so far, when the displacement rotating body 21 is in the drive position D and the reverse position R, the displacement rotating body 21 is caught by the fixed rotating body 22, so that the input shaft portion is driven by the power of the drive motor 11. The output shaft portion 15 rotates together with 14. On the other hand, when the displacement rotating body 21 is in the parking position P, the displacement rotating body 21 is caught by the case receiving portion 61b of the brake case 61, so that the input shaft portion 14 does not rotate, and the output shaft portion 15 also rotates accordingly. do not. Therefore, by simply moving the displacement rotating body 21 to the drive position D, the reverse position R, and the parking position P, the power transmission device 20 can be switched between a state in which the output shaft portion 15 rotates and a state in which the output shaft portion 15 does not rotate.

Moreover, the displacement rotating body 21 is coaxial with the input shaft portion 14 at any of the drive position D, the reverse position R, and the parking position P. Therefore, the configuration in which the displacement rotating body 21 is hooked on the output shaft portion 15 and the configuration in which the displacement rotating body 21 is hooked on the case receiving portion 61b of the brake case 61 are separated from the input shaft portion 14 and the output shaft portion 15 in the radial direction β. There is no need to place it in the desired position. Therefore, in the power transmission device 20, it is possible to switch the mode of transmitting power from the input shaft portion 14 to the output shaft portion 15, and further, the power transmission device 20 can be miniaturized.

According to the present embodiment, when the displacement rotating body 21 is in the parking position P, the displacement catching portion 32 is hooked on the fixed rotating body 22 in addition to the case receiving portion 61b of the brake case 61. In this case, the displacement rotating body 21 regulates both the rotation of the input shaft portion 14 and the rotation of the output shaft portion 15. Therefore, when the shift range of the power transmission device 20 is in the parking range, it is possible to avoid unintentional rotation of the output shaft portion 15 and the axle even though the drive motor 11 is not driven. ..

According to the present embodiment, the displacement rotating body 21 is displaced to the drive position D, the reverse position R, and the parking position P by moving in the axial direction α relative to the input shaft portion 14. In this configuration, since the displacement rotating body 21 is provided coaxially with the input shaft portion 14, it is possible to facilitate the realization of a configuration in which the displacement rotating body 21 moves in the axial direction α along the input shaft portion 14. Therefore, it is possible to prevent the configuration in which the displacement rotating body 21 can be displaced to the drive position D, the reverse position R, and the parking position P from becoming complicated.

According to the present embodiment, the rotational movement of the input shaft portion 14 is performed by the female screw portion 31a of the displacement rotating body 21 that meshes with the male screw portion 14a of the input shaft portion 14 and the braking device 24 that regulates the rotation of the displacement rotating body 21. Is configured as a motion conversion unit that converts the displacement rotating body 21 into a translational motion. In this configuration, the displacement rotating body 21 can be moved to each of the drive position D, the reverse position R, and the parking position P by translating. Therefore, by translating the displacement rotating body 21 by using the power of the drive motor 11 for rotating the input shaft portion 14, the displacement rotating body 21 is moved to the drive position D, the reverse position R, and the parking position P. Can be moved to. In this case, since it is not necessary to provide the power transmission device 20 with a dedicated power source such as a dedicated motor for moving the displacement rotating body 21, the power transmission device 20 can be miniaturized.

According to the present embodiment, the first bottom portion 43, the third hooking portion 54, and the receiving bottom surface 61d of the brake case 61 serve as the straight-line restricting portion that regulates the translational motion of the displacement rotating body 21 by coming into contact with the displacement rotating body 21. It is provided side by side on the displacement rotating body 21 in the axial direction α. Therefore, when the displacement rotating body 21 reaches a desired position, the displacement rotating body 21 can be prevented from passing through the desired position by the first bottom portion 43, the third hooking portion 54, and the receiving bottom surface 61d. Specifically, the displacement rotating body 21 can be prevented from moving to the output side from the drive position D by the first bottom portion 43. Further, it is possible to prevent the displacement rotating body 21 from moving to the input side from the reverse position R or the parking position P by the third hooking portion 54 or the receiving bottom surface 61d.

Moreover, since a part of the fixed rotating body 22 is used as a portion for restricting the translational motion of the displacement rotating body 21, it is not necessary to provide a dedicated member for restricting the translational motion of the displacement rotating body 21. Therefore, it is possible to prevent the power transmission device 20 from becoming large in size in order to realize a configuration capable of regulating the translational motion of the displacement rotating body 21.

According to the present embodiment, when the braking device 24 is in the braking state, the rotational motion of the input shaft portion 14 is forcibly converted into the translational motion of the displacement rotating body 21. On the other hand, when the brake device 24 is in the braking release state, the displacement rotating body 21 rotates together with the input shaft portion 14, so that the rotational movement of the input shaft portion 14 is not converted into the translational movement of the displacement rotating body 21. As described above, since the brake device 24 only needs to have a function of switching the motion of the displacement rotating body 21 between the rotary motion and the translational motion, the power consumption of the brake device 24 can be reduced. Therefore, the brake device 24 can be miniaturized, and as a result, the power transmission device 20 can be miniaturized.

According to the present embodiment, the braking device 24 regulates the rotation of the displacement rotating body 21, so that the input shaft portion 14 rotates relative to the displacement rotating body 21 and the displaced rotating body 21 rotates in the axial direction α. Translate. Therefore, if the braking device 24 has a function of restricting the rotation of the displacement rotating body 21, the motion of the displacement rotating body 21 can be switched between the rotational motion and the translational motion. Therefore, the power consumption of the brake device 24 can be further reduced.

According to the present embodiment, in the brake device 24, the rotation of the displacement rotating body 21 is restricted by restricting the rotation of the brake rotor 63 that rotates together with the displacement rotating body 21. In this configuration, even if the outer shape and outer diameter of the input shaft portion 14 are changed, the inner shape and inner diameter of the displacement rotating body 21 must be changed, while the outer shape and outer diameter of the displacement rotating body 21 must be changed. , It is not necessary to change the shape and dimensions of the brake rotor 63. That is, in the drive system 10, when the brake device 24 is used for a plurality of products, if the shape of the displacement rotating body 21 is applied to the input shaft portion 14 for each product, it is necessary to change the specifications of the brake device 24. not. In this way, the versatility of the brake device 24 can be enhanced.

According to the present embodiment, the displacement rotating body 21 moves to the parking position P when the shift range of the vehicle is switched to the parking range, and moves to the drive position D when the shift range is switched to the drive range. Further, when the shift range is switched to the reverse range, the shift range is moved to the reverse position R. In this configuration, the traveling mode of the vehicle can be switched by simply moving the displacement rotating body 21 provided coaxially with the input shaft portion 14.

According to the present embodiment, when the displacement rotating body 21 is in the neutral position N, the displacement rotating body 21 is not caught by either the fixed rotating body 22 or the brake case 61. In this case, while the input shaft portion 14 can be rotated by the power of the drive motor 11, the output shaft portion 15 does not rotate due to the rotation of the input shaft portion 14. Therefore, by simply moving the displacement rotating body 21 to the neutral position N, the power transmission device 20 can be moved to a state in which power is not transmitted from the input shaft portion 14 to the output shaft portion 15.

(Second Embodiment)
In the first embodiment, the brake device 24 indirectly regulates the rotation of the displacement rotating body 21 by restricting the rotation of the brake rotor 63, but in the second embodiment, the brake device 24 is displaced and rotated. Directly regulate the rotation of the body 21. In this embodiment, the differences from the first embodiment will be mainly described.

As shown in FIG. 23, the brake device 24 has a brake member 81 and a brake drive unit 82 in place of the brake stator 62, the brake rotor 63, the braking unit 64, and the bearing unit 65 of the first embodiment. .. The brake member 81 and the drive unit 82 are housed in the brake case 61. The brake member 81 is provided side by side on the displacement rotating body 21 in the radial direction β, and is movable in the radial direction β. The brake member 81 is movable to a hooking position where the displacement rotating body 21 is hooked on the displacement groove portion 33 and a catching release position where the brake member 81 is not caught on the displacement groove portion 33. When the brake member 81 is in the hooked position, the rotation of the displacement rotating body 21 is restricted by the brake member 81. On the other hand, when the brake member 81 is in the catch release position, the rotation of the displacement rotating body 21 is not restricted by the brake member 81.

The brake member 81 has a brake hooking portion 81a and a brake extending portion 81b. The brake hooking portion 81a is an elongated portion extending in the axial direction α, and has a shape and a size capable of entering the inside of the displacement groove portion 33. The brake extending portion 81b extends radially outward from the brake hooking portion 81a. When the brake member 81 is in the hooked position, the brake hooked portion 81a is in a state of being inserted into the displacement groove portion 33. On the other hand, when the brake member 81 is in the catch release position, the brake catch portion 81a does not enter the inside of the displacement groove portion 33.

The brake drive unit 82 is an electric motor or the like, and by driving the brake member 81, it is possible to shift the brake member 81 to a catching position and a catching release position. The brake device 24 has a position holding portion that holds the position of the brake member 81. The position holding portion urges the brake member 81 toward, for example, the catch release position, and the brake drive portion 82 moves the brake member 81 to the catch position against the urging force of the position holding portion.

(Other embodiments)
Although the plurality of embodiments according to the present disclosure have been described above, the present disclosure is not construed as being limited to the above embodiments, and is applied to various embodiments and combinations within the scope of the gist of the present disclosure. can do.

As a modification 1, the drive angle, the reverse angle, and the parking angle may be different from each other, or the drive angle and the parking angle may be the same. In short, the drive angle, the reverse angle, and the parking angle may be arbitrarily set. In other words, in the fixed rotating body 22, the first hooking portion 42 and the second hooking portion 52 do not have to overlap in the axial direction α, and the first hooking portion 42 and the third hooking portion 54 are in the axial direction. It may be provided so as to overlap with α.

As a modification 2, the neutral position N may be set between the reverse position R and the parking position P for the position of the displacement rotating body 21, and the parking position N is opposite to the neutral position N with the drive position D in between. The position P may be set. In short, the order of the drive position D, the reverse position R, the neutral position N, and the parking position P in the axial direction α may be arbitrarily set.

As a modification 3, the number of displacement hooking portions 32 of the displacement rotating body 21 is different from the number of first hooking portions 42, the number of second hooking portions 52, and the number of third hooking portions 54 of the fixed rotating body 22. May be. Further, the separation distance L2 of the adjacent first hooking portions 42, the separation distance L3 of the adjacent second hooking portions 52, and the separation distance L4 of the adjacent third hooking portions 54 are from the length dimension L1 of the displacement hooking portion 32. It may be clearly larger.

As a modification 4, the fixed rotating body 22 is not formed by combining two members, the first fixing member 40 and the second fixing member 50, but may be formed by one member. Further, it may be formed by combining three or more members.

As a modification 5, the fixed rotating body 22 may be formed by a part of the output shaft portion 15 instead of being a separate member attached to the output shaft portion 15. That is, the output shaft portion 15 may have the fixed rotating body 22. In both the configuration in which the output shaft portion 15 and the fixed rotating body 22 are separate members and the configuration in which the output shaft portion 15 has the fixed rotating body 22, the displacement rotating body 21 is attached to the output shaft portion 15. We have realized a configuration that can be caught.

As a modification 6, the fixed rotating body 22 may be configured to enter the inside of the displacement rotating body 21. In this case, for example, in the displacement rotating body 21, the displacement catching portion 32 projects radially inward from the inner peripheral surface of the displacement base portion 31. On the other hand, in the fixed rotating body 22, the first hooking portion 42 projects radially outward from the first base portion 41. Further, the second hooking portion 52 and the third hooking portion 54 project outward from the second base portion 51 in the radial direction.

As a modification 7, in the brake case 61, the case receiving portion 61b on which the displacement catching portion 32 of the displacement rotating body 21 is hooked may be a convex portion instead of a concave portion. In short, it suffices if the case receiving portion 61b realizes a configuration in which the displacement catching portion 32 is hooked on a part of the brake case 61.

As a modification 8, the receiving member on which the displacement rotating body 21 is hooked may be a part of the vehicle body or a part of the vehicle frame instead of the brake case 61.

As a modification 9, if the brake rotor 63 is hooked on the displacement rotating body 21 in the circumferential direction γ, the inner protruding portion 63c of the brake rotor 63 is configured to enter the inside of the displacement groove portion 33 of the displacement rotating body 21. It does not have to be. For example, the convex portion provided on the displacement rotating body 21 may be inserted into the concave portion provided on the brake rotor 63. In short, it suffices that the brake rotor 63 can both move relative to the displacement rotating body 21 in the axial direction α and rotate together with the displacement rotating body 21.

As a modification 10, as the braking method of the braking device 24, a friction brake, a magnetic brake, a powder brake, or a functional fluid brake may be used instead of or in addition to the MRF brake. Regardless of which brake method is used, it is sufficient that the braking unit 64 can regulate the rotation of the brake rotor 63 in the brake device 24.

As a modification 11, when the displacement rotating body 21 is at the parking position P as the rotation restricting position, the connection between the input shaft portion 14 and the output shaft portion 15 may be disconnected. For example, when the displacement rotating body 21 is in the parking position P, the displacement hooking portion 32 is not caught by both the third hooking portion 54 and the case receiving portion 61b, but is caught by the case receiving portion 61b while being caught by the third hooking portion 61b. The structure is such that it does not get caught in the portion 54. In this configuration, the displacement hooking portion 32 is hooked on the case receiving portion 61b, so that the rotation of the input shaft portion 14 is restricted. On the other hand, the displacement hooking portion 32 does not catch on the third hooking portion 54, whereby the rotation of the output shaft portion 15 is not restricted. Therefore, the output shaft portion 15 does not rotate depending on the power of the drive motor 11, but the rotation of the output shaft portion 15 is not prohibited.

As a modification 12, the power transmission device 20 may not be provided between the drive motor 11 and the transmission 12, but may be provided between the transmission 12 and the wheels. That is, in the path for transmitting power, the power transmission device 20 may be provided not on the upstream side but on the downstream side of the transmission 12. Further, the drive system 10 does not have to have the transmission 12. In this case, the power transmission device 20 is provided between the drive motor 11 and the wheels. That is, the power transmission device 20 may be provided on the downstream side of the drive motor 11 in the path for transmitting power.

As a modification 13, the center line CL of the input shaft portion 14 and the center line of the output shaft portion 15 do not have to coincide with each other. For example, the output shaft portion 15 is provided at a position where the center line of the output shaft portion 15 extends in parallel with the center line CL of the input shaft portion 14 and is displaced in the radial direction β from the input shaft portion 14. In this configuration, the center lines of the fixed rotating body 22 and the displacement rotating body 21 coincide with the center line CL of the input shaft portion 14, and the transmission of gears and the like that transmit power from the fixed rotating body 22 to the output shaft portion 15. A member is provided between the fixed rotating body 22 and the output shaft portion 15. Therefore, even if the output shaft portion 15 is provided at a position displaced in the radial direction β from the input shaft portion 14, it is possible to realize a configuration in which the output shaft portion 15 can rotate with the rotation of the displacement rotating body 21.

As a modification 14, the power transmission device 20 may have a dedicated power source such as an electric motor that applies power for moving the displacement rotating body 21 in the axial direction α to the displacement rotating body 21. For example, the displacement rotating body 21 is not screwed to the input shaft portion 14, and both moves relative to the input shaft portion 14 in the axial direction α and rotates together with the input shaft portion 14. It is attached to the input shaft portion 14 in a possible state. In this configuration, the power transmission device 20 has a configuration in which the displacement rotating body 21 moves in the axial direction α as the dedicated power source is driven. The ECU 70 is electrically connected to a dedicated power source, and controls the operation of the dedicated power source by outputting a command signal. The ECU 70 sets the position of the displacement rotating body 21 to any of the drive position D, the neutral position N, the reverse position R, and the parking position P by controlling the operation of the dedicated power source. Even in this configuration, since the displacement rotating body 21 is provided coaxially with the input shaft portion 14, the power transmission device 20 can be miniaturized.

As a modification 15, the displacement rotating body 21 may be attached to the output shaft portion 15 so as to rotate together with the output shaft portion 15 instead of the input shaft portion 14. For example, in the above modification 14, the displacement rotating body 21 outputs in a state where it can both move relative to the output shaft portion 15 in the axial direction α and rotate together with the output shaft portion 15. It is attached to the shaft portion 15. Further, as in the modification 14, the power transmission device 20 has a dedicated power source for generating power for moving the displacement rotating body 21 in the axial direction α, and the displacement rotating body 21 as the dedicated power source is driven. Has a configuration in which is moved in the axial direction α. According to this configuration, even if the displacement rotating body 21 is attached to the output shaft portion 15, it is possible to switch the mode of transmitting power from the input shaft portion 14 to the output shaft portion 15 by displacing the displacement rotating body 21. can. In the configuration in which the displacement rotating body 21 is attached to the output shaft portion 15, the output shaft portion 15 corresponds to the first shaft portion and the input shaft portion 14 corresponds to the second shaft portion.

As a modification 16, the displacement rotating body 21 does not have to be coaxial with the input shaft portion 14. For example, the displacement rotating body 21 is formed in a plate shape, and a plurality of teeth meshing with the male screw portion 14a of the input shaft portion 14 are arranged along the plate surface of the displacement rotating body 21. Even in this configuration, the brake device 24 holds the displacement rotating body 21 in a position so as not to move in the circumferential direction γ, so that the input shaft portion 14 rotates relative to the displacement rotating body 21 and the input shaft portion 14 Move in the axial direction α. In this case, the plurality of teeth of the displacement rotating body 21 and the brake device 24 correspond to the motion conversion unit.

As a modification 17, the drive system 10 may have an internal combustion engine such as a gasoline engine as a power source in place of or in addition to the drive motor 11. That is, the power transmission device 20 may be mounted on a vehicle such as a hybrid vehicle equipped with an internal combustion engine as a power source.

As a modification 18, the power transmission device 20 may be mounted on a moving body other than a vehicle such as an aircraft or a ship. Further, the power transmission device 20 may not be mounted on a moving body, but may be installed in various stationary equipment such as a stationary generator. For example, the power transmission device 20 that transmits the power of the drive motor 11 from the input shaft unit 14 to the output shaft unit 15 can also be referred to as a motor output switching device that switches the output mode of the power of the drive motor 11.

11 ... Drive motor as a power source, 12 ... Transmission, 14 ... Input shaft portion as the first shaft portion, 14a ... Male screw portion, 15 ... Output shaft portion as the second shaft portion, 20 ... Power transmission device, 21 ... Rotating body and displacement rotating body as a driving rotating body, 24 ... Brake device as a motion conversion unit and conversion forcing unit, 31a ... Female screw portion as a motion conversion unit, 43 ... First bottom portion as a straight-ahead restricting unit, 54 ... Third hooking part as a straight-ahead restricting part, 61 ... Brake case as a receiving member, 61d ... Case bottom surface as a straight-ahead restricting part, 63 ... Brake rotor as a driven rotating body, D ... Drive position as a rotating position and a connecting position , N ... Neutral position as disconnection position, P ... Rotation restriction position and parking position as connection position, R ... Reverse position as rotation position and connection position, α ... Axial direction.

Claims (18)

A power transmission device (20) that transmits the power from the input shaft portion to the output shaft portion so that the output shaft portion (15) rotates together with the input shaft portion (14) rotated by the power of the power source (11). And,
A rotating body (21) that rotates together with a first shaft portion (14), which is one of the input shaft portion and the output shaft portion, and is hooked on a predetermined receiving member (61) to cause the first shaft portion. By catching on the rotation regulation position (P) that regulates rotation and the second shaft portion (15) of the input shaft portion and the output shaft portion that is not the first shaft portion without being caught on the receiving member. A rotating body (21) that can move to a rotation position (D, R) that rotates both the first shaft portion and the second shaft portion, and
A motion conversion unit that converts the rotational motion of the input shaft portion into a linear motion in which the rotating body travels straight along the first shaft portion so that the rotating body moves to the rotation restricting position and the rotation position. 24, 31a) and
Equipped with
The rotating body extends in a cylindrical shape along the outer peripheral surface of the first shaft portion, and is provided coaxially with the first shaft portion at both the rotation restricting position and the rotation position. The power transmission device according to claim 1, wherein the rotating body is hooked on the second shaft portion in addition to the receiving member at the rotation restriction position. Claim 1 or 2 that the rotating body is displaced between the rotation restricted position and the rotation position by moving relative to the first shaft portion in the axial direction (α) of the first shaft portion. The power transmission device described in. It is provided side by side on the rotating body along the first shaft portion, and includes a straight traveling restricting unit (43, 54, 61d) that regulates the linear motion of the rotating body by coming into contact with the rotating body. The power transmission device according to any one of claims 1 to 3 . The motion conversion unit is
A conversion forcing unit (24) that shifts to a conversion forced state for forcing a motion conversion of the rotating body from the rotational motion of the input shaft portion to the linear motion of the rotating body and a conversion release state for which the conversion forced state is released. The power transmission device according to any one of claims 1 to 4 . The first shaft portion is the input shaft portion, and is
The motion conversion unit is
It has a female screw portion (31a) that is provided on the inner peripheral surface of the rotating body and meshes with the male screw portion (14a) provided on the outer peripheral surface of the input shaft portion.
The conversion forcing unit is
In the conversion forced state, the input shaft portion is rotated relative to the rotating body by restricting the rotation of the rotating body.
The power transmission device according to claim 5 , wherein in the conversion release state, the rotating body is rotated together with the input shaft portion without restricting the rotation of the rotating body. The motion conversion unit is
When the rotating body is referred to as a driving rotating body, in a state where the rotating body is rotating together with the input shaft portion according to the rotation of the driving rotating body, the driving rotating body is rotated in the axial direction of the input shaft portion with respect to the input shaft portion. In a state where the rotation with respect to the input shaft portion is slow with the driving rotating body without moving relative to α), the driving rotating body is moved relative to the input shaft portion in the axial direction. It has a driven rotating body (63) and has
The conversion forcing unit is
In the conversion forced state, the rotation of the driven rotating body is regulated by restricting the rotation of the driven rotating body.
The power transmission device according to claim 6 , wherein the rotation of the driven rotating body is not regulated and the rotation of the driven rotating body is not regulated in the conversion release state. The power source is a traveling drive source mounted on a vehicle and for driving the vehicle.
The output shaft portion is a shaft for rotating an axle mounted on the vehicle.
The rotating body moves to the rotation restricted position when the shift range of the vehicle is switched to the parking range, and moves to the rotation position when the shift range is switched to the drive range or the reverse range. The power transmission device according to any one of 7 to 7 . Any of claims 1 to 8 , wherein the rotating body can move to a neutral position (N) that is not caught by either the receiving member or the second shaft portion in addition to the rotation restricting position and the rotation position. The power transmission device according to one. A power transmission device (20) that transmits the power from the input shaft portion to the output shaft portion so that the output shaft portion (15) rotates together with the input shaft portion (14) rotated by the power of the power source (11). And,
A rotating body (21) that rotates together with a first shaft portion (14), which is one of the input shaft portion and the output shaft portion, and is hooked on a predetermined receiving member (61) to cause the first shaft portion. By catching on the rotation regulation position (P) that regulates rotation and the second shaft portion (15) of the input shaft portion and the output shaft portion that is not the first shaft portion without being caught on the receiving member. Rotating positions (D, R) for rotating both the first shaft portion and the second shaft portion, and a rotating body (21) that is relatively movable with respect to the first shaft portion.
A motion conversion unit that converts the rotational motion of the input shaft portion into a linear motion in which the rotating body travels straight along the first shaft portion so that the rotating body moves to the rotation position and the rotation restriction position. 24, 31a) and
A power transmission device equipped with. A power transmission device (20) that transmits the power from the input shaft portion to the output shaft portion so that the output shaft portion (15) rotates together with the input shaft portion (14) rotated by the power of the power source (11). And,
A rotating body (21) that rotates together with a first shaft portion (14) that is one of the input shaft portion and the output shaft portion, and the first shaft portion of the input shaft portion and the output shaft portion. The first axis is at the connection position (D, P, R) connected to the second axis portion (15) which is not present, and the connection disconnection position (N) where the connection with the second axis portion is disconnected. A rotating body (21) that is relatively movable with respect to the portion,
A motion conversion unit that converts the rotational motion of the input shaft portion into a linear motion in which the rotating body travels straight along the first shaft portion so that the rotating body moves to the connection position and the connection disconnection position. 24, 31a) and
Equipped with
The rotating body extends in a cylindrical shape along the outer peripheral surface of the first shaft portion, and is provided coaxially with the first shaft portion at both the connection position and the connection disconnection position. The eleventh aspect of claim 11 , wherein the rotating body is displaced between the connection position and the connection disconnection position by moving relative to the first shaft portion in the axial direction (α) of the first shaft portion. Power transmission device. It is provided side by side on the rotating body along the first shaft portion, and includes a straight traveling restricting unit (43, 54, 61d) that regulates the linear motion of the rotating body by coming into contact with the rotating body. The power transmission device according to claim 11 or 12 . The motion conversion unit is
A conversion forcing unit (24) that shifts to a conversion forced state for forcing a motion conversion of the rotating body from the rotational motion of the input shaft portion to the linear motion of the rotating body and a conversion release state for which the conversion forced state is released. The power transmission device according to any one of claims 11 to 13 . The first shaft portion is the input shaft portion, and is
The motion conversion unit is
It has a female screw portion (31a) that is provided on the inner peripheral surface of the rotating body and meshes with the male screw portion (14a) provided on the outer peripheral surface of the input shaft portion.
The conversion forcing unit is
In the conversion forced state, the input shaft portion is rotated relative to the rotating body by restricting the rotation of the rotating body.
The power transmission device according to claim 14 , wherein in the conversion release state, the rotating body is rotated together with the input shaft portion without restricting the rotation of the rotating body. The motion conversion unit is
When the rotating body is referred to as a driving rotating body, in a state where the rotating body is rotating together with the input shaft portion according to the rotation of the driving rotating body, the driving rotating body is rotated in the axial direction of the input shaft portion with respect to the input shaft portion. In a state where the rotation with respect to the input shaft portion is slow with the driving rotating body without moving relative to α), the driving rotating body is moved relative to the input shaft portion in the axial direction. It has a driven rotating body (63) and has
The conversion forcing unit is
In the conversion forced state, the rotation of the driven rotating body is regulated by restricting the rotation of the driven rotating body.
The power transmission device according to claim 15 , wherein the rotation of the driven rotating body is not regulated and the rotation of the driven rotating body is not regulated in the conversion release state. The power source is a traveling drive source mounted on a vehicle and for driving the vehicle.
The output shaft portion is a shaft for rotating the wheels of the vehicle.
11. The rotating body moves to the connection position when the shift range of the vehicle is switched to the drive range or the reverse range, and moves to the connection disconnection position when the shift range is switched to the neutral range. The power transmission device according to any one of 16 . A power transmission device (20) that transmits the power from the input shaft portion to the output shaft portion so that the output shaft portion (15) rotates together with the input shaft portion (14) rotated by the power of the power source (11). And,
A rotating body (21) that rotates together with a first shaft portion (14) that is one of the input shaft portion and the output shaft portion, and the first shaft portion of the input shaft portion and the output shaft portion. The first axis is at the connection position (D, R, P) connected to the second axis portion (15) which is not present, and the connection disconnection position (N) where the connection with the second axis portion is disconnected. A rotating body (21) that is relatively movable with respect to the portion,
Motion conversion unit (24, 31a) that converts the rotational movement of the input shaft portion into a straight movement that goes straight along the first shaft portion so that the rotating body moves to the connection position and the connection disconnection position. When,
A power transmission device equipped with.

Images