JP2014052281A - Biaxial position sensor and shift position sensor including the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a biaxial position sensor capable of detecting biaxial movements as changes in independent magnetic fields and a shift position sensor including the same.SOLUTION: A biaxial position sensor comprises: a striking rod 100 that can perform rotational movement around an axis CL and slide movement in a direction of the axis CL; a first move part 200 that is rotationally and slidingly moved by the rotational movement and the slide movement of the striking rod 100; a first magnet 230 that is fitted to the first move part 200 in a direction of the slide movement and is movably supported in a direction of the rotational movement around the axis CL; a first position sensor 250 for detecting a magnetic field of the first magnet 230; a second move part 300 that is rotationally and slidingly moved by the rotational movement and the slide movement of the striking rod 100; a second magnet 330 that is fitted to the second move part 300 in the direction of the rotational movement and is movably supported in the direction of the slide movement; and a second position sensor 350 for detecting a magnetic field of the second magnet 330.

Description

  The present invention relates to a biaxial position sensor and a shift position sensor using the biaxial position sensor, and more particularly to a biaxial position sensor that independently detects the biaxial direction of the rotational direction and the axial direction and a shift position sensor using the biaxial position sensor.

  Conventionally, there is a shift control device that manually shifts a transmission of a vehicle (see, for example, Patent Document 1). This shift controller selects the rail by moving the horizontal axis in the “YY” selection direction, and rotates to move the selected rail in the “XX” connecting / disconnecting direction. The selected gear ratio can be connected and disconnected. Further, when the third / fourth speed shift fork is rotated counterclockwise from the position where the third / fourth speed shift fork is selected in a single shift shaft having an individual rotational position for selecting each shift fork, the fifth / second When the 6-speed shift fork is selected and rotates clockwise, the 1st / 2nd speed shift fork is selected, and the reverse shift fork is further selected.

JP-A-6-235457

  However, in the shift control device disclosed in Patent Document 1, it is necessary to detect the axial movement of the shaft during the shift operation and the individual rotational position for selecting each shift fork. For example, if a magnetic detection element is used to detect the axial direction and the two-axis position around the axis, the permanent magnet used for detection must have a complicated shape and complex magnetization, or each movement On the other hand, it is necessary to arrange a plurality of magnetic detection elements for detecting movement and rotation.

  Accordingly, an object of the present invention is to provide a two-axis position sensor capable of detecting a two-axis operation as an independent magnetic field change, and a shift position sensor using the two-axis position sensor.

[1] In order to achieve the above object, the present invention provides a striking rod capable of rotational movement around an axis and sliding movement in the axial direction, and rotational movement and sliding movement by the rotational movement and sliding movement of the striking rod. A first moving part, a first magnet fitted into the first moving part with a large gap in the sliding movement direction and supported so as to be movable in the rotational movement direction, and a magnetic field of the first magnet A first position sensor that detects a change of the second position, a second moving portion that rotates and slides by the rotational movement and sliding movement of the striking rod, and the second movement having a large gap in the rotational movement direction. The second magnet that is fitted to the part and supported so as to be movable in the slide movement direction, and the change in the magnetic field of the second magnet is detected. A second position sensor that provides a two-axis position sensor and having a.

[2] The first magnet is moved only in the rotational movement direction by the first moving part, and the second magnet is moved only in the sliding movement direction by the second moving part. The biaxial position sensor described in [1] may be used.

[3] The above-described [1] or [3], wherein the striking rod is operated by a shift lever, and the shift operation and the select operation of the shift lever are detected independently based on outputs of the first position sensor and the second position sensor. The shift position sensor using the biaxial position sensor described in 2] may be used.

  According to the present invention, it is possible to provide a two-axis position sensor capable of detecting a two-axis operation as an independent magnetic field change and a shift position sensor using the two-axis position sensor.

FIG. 1 is a schematic perspective view showing a two-axis position sensor and a shift position sensor using the same according to an embodiment of the present invention. 2A is a view as seen from an arrow A in the vicinity of the first moving unit in FIG. 1, and FIG. 2B is a view as seen from an arrow B. FIG. 3A is a view taken in the direction of arrow A in the vicinity of the second moving unit in FIG. 1, and FIG. 3B is a view taken in the direction of arrow C. FIG. 4A is a graph showing the output signal of the first position sensor, and FIG. 4B is a graph showing the second position sensor output signal.

(Configuration of 2-axis position sensor and shift position sensor)
FIG. 1 is a schematic perspective view showing a two-axis position sensor and a shift position sensor using the same according to an embodiment of the present invention. 2A is a view as seen from an arrow A in the vicinity of the first moving unit in FIG. 1, and FIG. 2B is a view as seen from an arrow B. Moreover, Fig.3 (a) is A arrow view of the 2nd moving part vicinity in FIG. 1, FIG.3 (b) is C arrow view.

  The biaxial position sensor 10 according to the embodiment of the present invention includes a striking rod 100 capable of rotating around the axis CL and sliding in the direction of the axis CL, and rotating and sliding by rotating and sliding the striking rod 100. A first moving unit 200 that moves, a first magnet 230 that is fitted in the first moving unit 200 with a large gap in the sliding movement direction and is supported so as to be movable in the rotational movement direction around the axis CL; A first position sensor 250 that detects a change in the magnetic field of one magnet 230; a second moving unit 300 that rotates and slides by the rotational movement and sliding movement of the striking rod 100; and a large gap in the rotational movement direction. The second magnet 33 fitted to the second moving part 300 and supported so as to be movable in the slide moving direction. When, it is schematically configured to have a second position sensor 350 for detecting a change in magnetic field of the second magnet 330, a.

  In the shift position sensor 20, the striking rod 100 is operated by the shift lever 50, and the shift operation of the shift lever 50 and the selection operation are independently detected by the outputs of the first position sensor 250 and the second position sensor 350. The position sensor 10 is schematically configured.

  The biaxial position sensor 10 according to the embodiment of the present invention is opposed to the first magnet 230 that moves by being driven only in the rotational movement direction around the axis CL by the first moving unit 200 attached to the striking rod 100. The first position sensor 250 provided to detect the rotational movement of the striking rod 100 around the axis CL and is driven only in the slide movement direction in the direction of the axis CL by the second moving part 300 attached to the striking rod 100. The second position sensor 350 provided opposite to the second magnet 330 that moves and detects the sliding movement of the striking rod 100 in the axis CL direction. In this detection, the first position sensor 250 can independently detect only the rotational movement of the striking rod 100 around the axis CL, while the second position sensor 350 can detect only the sliding movement of the striking rod 100 in the axis CL direction. It can be detected independently.

  The striking rod 100 is a long shaft, and a selection operation S (rod stroke) that is a sliding movement in the direction of the axis CL that is the central axis of the shaft shown in FIG. 1 and a shift operation R that is a rotational movement about the axis CL. (Rod rotation) is possible. The striking rod 100 is connected to the transmission. The selection operation S and the shift operation R are operated by the shift lever 50, and a shift position 70 such as 1st to 5th, R, etc. can be selected by a combination of the selection operation S and the shift operation R, for example.

  In this striking rod 100, the shift lever 50 is fixed to the cylindrical outer peripheral portion 101 of the striking rod 100 by an attachment member 60. By rotating the shift lever 50 about the axis CL by the shift operation R, the first moving unit 200 and the second moving unit 300 can be rotated about the axis CL integrally with the striking rod 100. Further, the first moving part 200 and the second moving part 300 can be slid in the direction of the axis CL integrally with the striking rod 100 by causing the shift lever 50 to slide in the direction of the axis CL by the selection operation S.

  The first moving part 200 is fixed to the cylindrical outer peripheral part 101 of the striking rod 100 by an annular mounting part 202. A drive frame 210 for driving the first magnet 230 protrudes from a part of the annular mounting portion 202 of the first moving unit 200. As shown in FIGS. 1 and 2, the drive frame 210 is formed of a recess 211 that opens in the direction of the first magnet 230 and a frame 212 that forms the periphery of the recess 211. The concave portion 211 is formed with a larger dimension in the slide movement direction in the axis CL direction than in the rotation movement direction around the axis CL.

  As shown in FIGS. 1 and 2, the first magnet 230 is formed of a plate-like or bar-like permanent magnet, and is magnetized so that both end portions have N and S poles. The magnetic flux from the N and S poles by this permanent magnet penetrates the first position sensor 250 in parallel as shown in FIG. The first magnet 230 is fixed to the magnet holder 232, and is driven integrally by the magnet holder 232 being driven by the first moving unit 200.

  Here, the magnet holder 232 and the first magnet 230 are supported on a support line 240 as shown in FIGS. 1 and 2A in a state in which only the rotational movement around the axis CL is possible (the support mechanism is not shown). ) Even if the magnet holder 232 and the first magnet 230 are supported on a straight line that approximates the rotational movement about the axis CL, the first position sensor 250 detects the rotational movement of the striking rod 100 about the axis CL. It is possible to do.

  A shaft portion 233 that protrudes from the magnet holder 232 is fitted in the recess 211. As described above, the concave portion 211 is formed in a larger dimension in the slide movement direction in the axis CL direction than in the rotation movement direction around the axis CL. Therefore, as shown in FIGS. In the rotational movement direction around the axis CL between the shaft portion 233 and the frame portion 212, a slidable clearance 211a is formed, whereas the gap between the shaft portion 233 and the frame portion 212 is formed. Clearances 211b and 211c are formed in the slide movement direction in the axis CL direction, which are large gaps that do not contact the shaft part 233 even when the frame part 212 moves in the slide movement direction. As described above, the first magnet 230 and the magnet holder 232 are fitted only to the first moving part 200 with a large gap in the sliding movement direction, and thus are driven only by the rotational movement of the striking rod 100 around the axis CL. Is done.

  The first position sensor 250 is a magnetic detection device that detects a change in the magnetic field of the first magnet 230. In the present embodiment, a Hall element is used, but other magnetic detection devices such as an MR (Magneto Resistance) element. Can also be used. The Hall element is a magnetic sensor using the Hall effect, which converts a magnetic field generated by a magnet or a magnetic field generated by a current into an electrical signal and outputs the electrical signal. The Hall element as the first position sensor 250 outputs a voltage proportional to the magnetic flux density B1 as a change in the magnetic field.

  The first position sensor 250 is mounted on the substrate 450.

  As shown in FIGS. 1 and 2, the first position sensor 250 is disposed to face the first magnet 230. Thereby, a change in magnetic flux density in the magnetic field B1 shown in FIG. 2A due to the rotational movement of the first magnet 230 can be detected. The first magnet 230 is rotationally moved only by the shift operation R (rod rotation) accompanying the rotational movement of the striking rod 100 around the axis CL by the shift lever 50, and is not driven by the select operation S (rod stroke). Accordingly, the first position sensor 250 detects a change in the magnetic field in the shift operation R (rod rotation) direction, and does not detect a change in the magnetic field in the selection operation S (rod stroke) direction. Thereby, the first position sensor 250 can independently detect only the shifting operation R (rod rotation) of the striking rod 100.

  The second moving part 300 is fixed to the cylindrical outer peripheral part 101 of the striking rod 100 by an annular mounting part 302. A drive frame 310 for driving the second magnet 330 protrudes from a part of the annular mounting portion 302 of the second moving unit 300. As shown in FIGS. 1 and 3, the drive frame 310 is formed of a recess 311 that opens in the direction of the second magnet 330 and a frame portion 312 that forms the periphery of the recess 311. The recess 311 is formed with a larger dimension in the rotational movement direction around the axis CL than in the sliding movement direction in the axis CL direction.

  As shown in FIGS. 1 and 3, the second magnet 330 is formed of a plate-shaped or bar-shaped permanent magnet, and is magnetized so that both end portions have N and S poles. Magnetic flux from the N and S poles by this permanent magnet penetrates through the second position sensor 350 in parallel as shown in FIG. The second magnet 330 is fixed to the magnet holder 332, and is driven integrally by the magnet holder 332 being driven by the second moving unit 300.

  Here, the magnet holder 332 and the second magnet 330 are supported on a support line 340 parallel to the axis CL as shown in FIG. 1 and FIG. The support mechanism is not shown).

  A shaft portion 333 provided so as to protrude from the magnet holder 332 is fitted in the recess 311. As described above, the recess 311 is formed with a larger dimension in the rotational movement direction around the axis CL than in the sliding movement direction in the axis CL direction, so as shown in FIGS. 3 (a) and 3 (b). In the slide movement direction in the axis CL direction between the shaft portion 333 and the frame portion 312, a slidable clearance 311 a is formed, whereas between the shaft portion 333 and the frame portion 312, In the rotational movement direction around the axis CL, gaps 311b and 311c, which are large gaps that do not come into contact with the shaft part 333 even when the frame part 312 moves in the rotational movement direction, are formed. As described above, the second magnet 330 and the magnet holder 332 are fitted only to the second moving unit 300 with a large gap in the rotational movement direction, and thus are driven only by the sliding movement of the striking rod 100 in the axis CL direction. Is done.

  The second position sensor 350 is a magnetic detection device that detects a change in the magnetic field of the second magnet 330. In the present embodiment, a Hall element is used, but other magnetic detection devices such as an MR (Magneto Resistance) element. Can also be used. The Hall element is a magnetic sensor using the Hall effect, which converts a magnetic field generated by a magnet or a magnetic field generated by a current into an electrical signal and outputs the electrical signal. The Hall element as the second position sensor 350 outputs a voltage proportional to the magnetic flux density B2 as a change in the magnetic field.

  Since the second position sensor 350 has the same mounting direction as the first position sensor 250, it is mounted on the substrate 450 together with the first position sensor 250.

  As shown in FIGS. 1 and 3, the second position sensor 350 is disposed to face the second magnet 330. Thereby, the change of the magnetic flux density in the magnetic field B2 shown in FIG. 3B due to the sliding movement of the second magnet 330 can be detected. The second magnet 330 is slid only by the selection operation S (rod stroke) accompanying the sliding movement of the striking rod 100 in the axis CL direction by the shift lever 50, and is not driven by the shift operation R (rod rotation). Therefore, the second position sensor 350 detects a change in the magnetic field in the select operation S (rod stroke) direction and does not detect a change in the magnetic field in the shift operation R (rod rotation) direction. Thereby, the second position sensor 350 can independently detect only the selection operation S (rod stroke) of the striking rod 100.

  FIG. 4A is a graph showing the output signal of the first position sensor, and FIG. 4B is a graph showing the second position sensor output signal.

  In the first position sensor 250, the shift voltage R (rod rotation) causes the output voltage V1 to be a linear region (linear) with a neutral position where the centers of the first magnet 230 and the first position sensor 250 shown in FIG. The output is used in the range of Rw. On the other hand, in the second position sensor 350, the output voltage V <b> 2 is a linear region with the neutral position where the centers of the second magnet 330 and the second position sensor 350 shown in FIG. It is used in the range of Sw.

  These output voltages V1 and V2 are for independently detecting the rotational movement of the first position sensor 250 and the second position sensor 350 around the axis CL and the sliding movement in the direction of the axis CL. Further, it is possible to obtain the shift position 70 by operating the shift lever 50 by combining the output voltages V1 and V2.

(Effect of Embodiment of the Present Invention)
The biaxial position sensor 10 and the shift position sensor 20 according to the present embodiment have the following effects.
(1) In the present embodiment, even if the first moving unit 200 slides integrally with the striking rod 100, the output of the first position sensor 250 is not affected by this sliding movement, and is due to the rotation of the striking rod 100. Only the change in the magnetic field of the first magnet 230 can be detected independently. Further, even if the second moving unit 300 rotates integrally with the striking rod 100, the output of the second position sensor 350 is not affected by this rotational movement, and the magnetic field of the second magnet 330 due to the sliding movement of the striking rod 100. Only the change in can be detected independently. As a result, biaxial motion can be detected and output independently, and detection accuracy can be improved.
(2) Since the first magnet 230 and the second magnet 330 have a simple magnet shape and magnetization, they are easy to process and manufacture.
(3) Since one position sensor can independently detect rotational movement or slide movement, the number of parts and the cost can be reduced.
(4) Since the two position sensors (first position sensor 250 and second position sensor 350) for detecting two axes have the same mounting direction, they can be mounted on the same substrate, and are easy to process and manufacture. Can be achieved.

  As mentioned above, although embodiment of this invention was described, these embodiment is only an example and does not limit the invention which concerns on a claim. These novel embodiments and modifications thereof can be implemented in various other forms, and various omissions, replacements, changes, and the like can be made without departing from the scope of the present invention. . In addition, not all the combinations of features described in these embodiments are essential to the means for solving the problems of the invention. Furthermore, these embodiments and modifications thereof are included in the scope and gist of the invention, and are included in the invention described in the claims and the equivalents thereof.

DESCRIPTION OF SYMBOLS 10 ... 2-axis position sensor 20 ... Shift position sensor 50 ... Shift lever 60 ... Mounting member 70 ... Shift position 100 ... Strike rod 101 ... Cylindrical outer peripheral part 200 ... 1st moving part 202 ... Mounting part 210 ... Drive frame 211 ... Recessed part 212 ... Frame portion 230 ... First magnet 232 ... Magnet holder 233 ... Shaft portion 240 ... Support line 250 ... First position sensor 300 ... Second moving portion 302 ... Mounting portion 310 ... Drive frame body 311 ... Recess 312 ... Frame portion 330 ... second magnet 332 ... magnet holder 333 ... shaft 340 ... support line 350 ... second position sensor 450 ... substrates B1, B2 ... magnetic field CL ... axis R ... shift operation S ... select operation

Claims (3)

A striking rod capable of rotational movement around the axis and sliding movement in the axial direction;
A first moving part that rotates and slides by the rotational movement and sliding movement of the striking rod;
A first magnet fitted into the first moving part with a large gap in the sliding movement direction and supported so as to be movable in the rotational movement direction;
A first position sensor for detecting a change in the magnetic field of the first magnet;
A second moving part that rotates and slides by the rotational movement and sliding movement of the striking rod;
A second magnet that is fitted in the second moving part with a large gap in the rotational movement direction and supported so as to be movable in the sliding movement direction;
A second position sensor for detecting a change in the magnetic field of the second magnet;
2 axis position sensor characterized by having.   The first magnet moves only in the rotational movement direction by the first moving part, and the second magnet moves only in the sliding movement direction by the second moving part. The two-axis position sensor described. 3. The biaxial position according to claim 1, wherein the striking rod is operated by a shift lever, and a shift operation and a select operation of the shift lever are independently detected by outputs of the first position sensor and the second position sensor. Shift position sensor using a sensor.

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