JP2018084517A - Torque detector for vehicles - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a torque detector for vehicles with which it is possible to connect a first wiring and second wiring with higher electrical reliability than conventionally possible and improve workability when connecting the first wiring and the second wiring.SOLUTION: A first circular electrode 60 is formed to a circle centering around a first shaft C1, a second circular electrode 62 is formed in a toric shape centering on the first shaft C1, a first rod-like electrode 66 is arranged at a position where it comes in contact with the first circular electrode 60 irrespective of the relative rotation of an input shaft 16 and a fixed sheave 24a, and a second rod-like electrode 68 is arranged at a position where it comes in contact with the second circular electrode 62 irrespective of the relative rotation of the input shaft 16 and the fixed sheave 24a. Therefore, even when the shaft ends of the input shaft 16 and the fixed sheave 24a are fitted to each other while the rotational phases of the input shaft 16 and the fixed sheave 24a are not aligned, the first rod-like electrode 66 comes in contact with the first circular electrode 60 and the second rod-like electrode 68 comes in contact with the second circular electrode 62, with a first wiring 50 and a second wiring 52 electrically connected.SELECTED DRAWING: Figure 3

Description

  The present invention provides a first wiring disposed on each of a first rotating member and a second rotating member that are rotated together around a common rotation axis by being fitted to each other at shaft end portions approaching each other, and A second wiring; electrically connecting the first wiring and the second wiring at the shaft ends of the first rotating member and the second rotating member; and transmitting a signal from a torque detection element to the first wiring and the second wiring In the vehicle torque detection apparatus obtained via two wirings, the first wiring and the second wiring can be electrically connected more reliably than in the prior art, and the first wiring and the second wiring. The present invention relates to a technique for improving workability when electrically connecting the two.

  There is known a torque detector that detects torque transmitted to a first rotating member and a second rotating member that are integrally rotated around a common rotation axis. For example, there is a torque detection device described in Patent Document 1 as an example. In the torque detection device described in Patent Document 1, a magnetic scale provided on the first rotating member and a detection head provided on the second rotating member are provided, and each of them is provided by a cylindrical connecting member. When the connected first rotating member and the second rotating member are rotated relative to each other about the connecting member by the input torque, the relative displacement between the detection head detected from the detection head and the magnetic scale is detected. A torque acting between the first rotating member and the second rotating member is calculated based on the amount, the elastic coefficient of the connecting member, and the like.

  Further, as another example of the torque detection device described in Patent Document 1, for example, the shaft ends close to each other are fitted to each other at one of a plurality of fitting positions around a common rotation axis. And a first wiring and a second wiring respectively disposed on the first rotation member and the second rotation member that are integrally rotated around the common rotation axis, and the first rotation member and the second rotation member A torque detection device is conceivable in which the first wiring and the second wiring are electrically connected at the shaft end, and a signal from the torque detection element is acquired via the first wiring and the second wiring.

JP 2012-189516 A JP 2009-154822 A

  By the way, in the torque detection device as described above, when the first wiring and the second wiring are electrically connected at the shaft end portions of the first rotating member and the second rotating member, for example, solder Although it is conceivable that the first and second rotating members rotate, the connecting portion between the first wiring and the second wiring is likely to be disconnected by the centrifugal force acting when the first rotating member and the second rotating member are rotating. There was a problem. Moreover, with respect to this problem, for example, a fitting-type first connector and a second connector as shown in FIG. 1 of Patent Document 2 are fixed to the first rotating member and the second rotating member, respectively. And connecting the first wiring and the second wiring to the first connector and the second connector, and using the first connector and the second connector to connect the first wiring and the second wiring. It is considered that the above problem can be solved by electrical connection. However, when the first wiring and the second wiring are electrically connected, the rotational phase between the first connector and the second connector, that is, around the rotational axis of the first rotating member and the second rotating member. Therefore, there is a problem that workability when the first wiring and the second wiring are electrically connected is deteriorated.

  The present invention has been made in the background of the above circumstances, and the object of the present invention is to connect the first wiring and the second wiring with higher electrical reliability than in the prior art. Another object of the present invention is to provide a vehicle torque detection device capable of improving workability when connecting the first wiring and the second wiring.

  The gist of the first aspect of the invention is that (a) the common rotational axis line is fitted to each other at one of a plurality of fitting positions around the common rotational axis line at the shaft end portions approaching each other. First wiring and second wiring respectively disposed on a first rotating member and a second rotating member that are integrally rotated around the first rotating member, and the shaft ends of the first rotating member and the second rotating member. And a wiring connection device that electrically connects one wiring and a second wiring, and a vehicle torque detection device that obtains a signal from the torque detection element via the first wiring and the second wiring. The wiring connection device is connected to a first wiring disposed on the first rotating member, and is fixed to the first rotating member, and a circular electrode formed in a circle or annulus around the rotation axis. The circular electrode is electrically disconnected. A first connector having a first electrode support member that supports the first rotating member; and (c) a second wiring disposed on the second rotating member; and the first rotating member and the second rotating member, A rod-shaped electrode positioned at a position in contact with the circular electrode regardless of relative rotation thereof, and a state in which the rod-shaped electrode is fixed to the second rotating member and is movable in the direction of the rotation axis and electrically insulated. And a second connector having a spring provided on the second electrode support member and biasing the rod-shaped electrode toward the circular electrode.

  According to a first aspect of the present invention, the wiring connection device is connected to a first wiring disposed on the first rotating member, and has a circular electrode formed in a circle or an annular shape around the rotation axis, and A first connector having a first electrode supporting member fixed to the first rotating member and supporting the circular electrode in an electrically insulated state, and connected to a second wiring disposed on the second rotating member. A rod-shaped electrode positioned at a position in contact with the circular electrode regardless of relative rotation between the first rotating member and the second rotating member; and the rod-shaped electrode fixed to the second rotating member and rotating the rod-shaped electrode A second electrode supporting member that is movable in the axial direction and supported in an electrically insulated state; and a spring that is provided on the second electrode supporting member and biases the rod-shaped electrode toward the circular electrode. A second connector. Therefore, when the shaft end portion of the first rotating member and the shaft end portion of the second rotating member are fitted to each other, the first rotating member is supported by the first electrode support member fixed to the first rotating member. In addition, the rod electrode supported by the second electrode support member fixed to the second rotating member contacts the circular electrode, and the rod electrode is biased toward the circular electrode by the spring. For example, compared with the conventional case where the first wiring and the second wiring are connected by solder, the first wiring and the second wiring can be electrically connected with high reliability. The circular electrode is formed in a circle or annulus centered on the rotation axis, and the rod-shaped electrode is in contact with the circular electrode regardless of relative rotation between the first rotating member and the second rotating member. Therefore, the shaft end of the first rotating member and the shaft of the second rotating member regardless of the rotational phase of the first rotating member and the second rotating member around the rotation axis. Even if the end portions are fitted to each other, the rod-shaped electrode contacts the circular electrode, and the first wiring and the second wiring are electrically connected. As a result, when the first wiring and the second wiring are electrically connected, the first wiring and the second wiring without matching the rotational phase around the rotation axis of the first rotating member and the second rotating member. Since the second wiring can be electrically connected, workability when connecting the first wiring and the second wiring is improved.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a skeleton diagram illustrating a schematic configuration of a vehicle transmission to which the present invention is applied. It is sectional drawing explaining schematic structure of the torque detection apparatus provided in the transmission for vehicles of FIG. It is the enlarged view to which a part of torque detection device of Drawing 2 was expanded. FIG. 4 is a view taken along the line IV-IV in FIG. 3, illustrating a first connector provided in the torque detection device in FIG. 2. FIG. 5 is a VV sectional view of FIG. 4. FIG. 4 is a view taken along the line VI-VI in FIG. 3, illustrating a second connector provided in the torque detection device in FIG. 2. FIG. 7 is a sectional view taken along the line VII-VII in FIG. 6. FIG. 3 is a diagram showing a state of an operation of electrically connecting the first connector and the second connector in the torque detection device of FIG. 2. It is a figure explaining the torque detection apparatus of Example 2 which is another Example of this invention, and is a figure equivalent to FIG. FIG. 10 is a sectional view taken along line XX in FIG. 9. It is a figure explaining the torque detection apparatus of Example 2, and is a figure equivalent to FIG. It is XII-XII sectional view taken on the line of FIG.

  Preferably, (a) a spline fitting protrusion is formed at one shaft end of the first rotating member and the second rotating member, and the spline fitting protrusion is formed at the other shaft end. (B) the first connector is fixed to the spline fitting protrusion, and (c) the second portion is formed at the bottom of the spline fitting hole. The connector is fixed. Therefore, a spline fitting protrusion formed on one shaft end of the first rotating member and the second rotating member is formed on the other shaft end of the first rotating member and the second rotating member. Since the first connector and the second connector are electrically connected by being fitted into the spline fitting hole portion, the workability when connecting the first wiring and the second wiring is improved. It is preferably improved.

  Preferably, (a) an even number of the rod-shaped electrodes are provided, and (b) the even-numbered rod-shaped electrodes are respectively arranged symmetrically with respect to the rotation axis in the rotation axis direction. Yes. For this reason, the vibration generated from the second rotating member when the second rotating member rotates around the rotation axis is suitably reduced.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In the following embodiments, the drawings are appropriately simplified or modified, and the dimensional ratios, shapes, and the like of the respective parts are not necessarily drawn accurately.

  FIG. 1 is a skeleton diagram for explaining a schematic configuration of a vehicle transmission 10 (hereinafter referred to as a transmission 10) to which the present invention is preferably applied. The transmission 10 is interposed between the engine 11 and the drive wheels 13L and 13R so that power can be transmitted. The transmission 10 includes, in the case 12, an input shaft (first rotating member) 16 that also functions as a turbine shaft of the torque converter 14, an output shaft 18 that is connected to the drive wheels 13L and 13R so that power can be transmitted, A belt-type continuously variable transmission mechanism 20 and a gear mechanism 22 are provided.

  The input shaft 16 is rotatably arranged around the first axis (rotation axis) C1 in the torque converter 14, and the torque from the engine 11 is input thereto. The end of the input shaft 16 opposite to the torque converter 14 is connected to a fixed sheave (second rotating member) 24 a of a primary pulley 24 provided in the continuously variable transmission mechanism 20. That is, a spline fitting protrusion 16a (see FIG. 2) is formed at the shaft end of the input shaft 16 on the fixed sheave 24a side, and the spline fitting is formed on the shaft end of the fixed sheave 24a on the input shaft 16 side. A spline fitting hole 24b (see FIG. 2) into which the protrusion 16a is fitted is formed. As shown in FIG. 2, the spline fitting protrusion of the input shaft 16 is inserted into the spline fitting hole 24b of the fixed sheave 24a. When 16a is spline-fitted into one of a plurality of fitting positions around the first axis C1, the fixed sheave 24a and the input shaft 16 are substantially non-rotatable and movable in the direction of the first axis C1. It is connected to. As a result, the input shaft 16 and the fixed sheave 24a have a common rotational axis by the spline fitting protrusion 16a and the spline fitting hole 24b being spline fitted to each other at the shaft ends approaching each other. It can be rotated integrally around the first axis C1. In FIG. 1, a drive gear 26 provided in the gear mechanism 22 and a forward / reverse switching mechanism 28 are provided on the outer peripheral side of the input shaft 16 in order from the torque converter 14 side.

  The forward / reverse switching mechanism 28 includes a forward clutch Ca, a reverse brake B, and a double pinion type planetary gear mechanism 30. The carrier CA of the planetary gear mechanism 30 is connected to the input shaft 16, the ring gear R is selectively connected to the case 12 which is a non-rotating member via the reverse brake B, and the sun gear S is connected to the carrier via the forward clutch Ca. It is selectively linked to CA. The sun gear S is integrally provided with a drive gear 26 provided in the gear mechanism 22. The drive gear 26 is meshed with a driven gear 32 provided in the gear mechanism 22.

  As shown in FIG. 1, the continuously variable transmission mechanism 20 is provided in a power transmission path between the input shaft 16 and the output shaft 18. The continuously variable transmission mechanism 20 has a primary pulley 24 having a variable effective diameter, which is an input side rotating member connected to the input shaft 16, and an effective diameter, which is an output side rotating member connected to the output shaft 18. A variable secondary pulley 34 and a transmission belt 36 wound between the primary pulley 24 and the secondary pulley 34 are provided. Power transmission is performed through.

  As shown in FIG. 1, the primary pulley 24 has a fixed sheave 24a as an input-side fixed rotating body connected to the input shaft 16, a relative sheave around the first axis C1 with respect to the fixed sheave 24a, and a first sheave 24a. For moving the movable sheave 24c in order to change the width of the V groove between the movable sheave 24c as an input side movable rotating body provided so as to be movable in the direction of the one axis C1 and the fixed sheave 24a and the movable sheave 24c. A primary hydraulic actuator 24d for generating thrust.

  As shown in FIG. 1, the secondary pulley 34 is connected to the output shaft 18 via a belt traveling clutch Cb, and functions as an output-side fixed rotating body. The secondary pulley 34 has a second axis C2 around the fixed sheave 34a. To change the V groove width between the movable sheave 34b as the output-side movable rotating body provided so as not to be relatively rotatable and movable in the second axis C2 direction, and the fixed sheave 34a and the movable sheave 34b. And a secondary hydraulic actuator 34c for generating a thrust for moving the movable sheave 34b.

  In the continuously variable transmission mechanism 20 configured as described above, the groove width of the primary pulley 24 and the secondary pulley 34 is changed to change the engagement diameter (effective diameter) of the transmission belt 36, so that the actual transmission ratio γ ( = Input shaft rotational speed Nin / Output shaft rotational speed Nout) is continuously changed. For example, when the V groove width of the primary pulley 24 is reduced, the speed ratio γ is reduced. That is, the continuously variable transmission mechanism 20 is upshifted. Further, when the V groove width of the primary pulley 24 is increased, the speed ratio γ is increased. That is, the continuously variable transmission mechanism 20 is downshifted.

  As shown in FIG. 1, the power transmission path between the secondary pulley 34 of the continuously variable transmission mechanism 20 and the output shaft 18 is provided with a belt travel clutch Cb that selectively connects and disconnects the power transmission path. . In the transmission 10, the torque of the engine 11 is transmitted to the output shaft 18 via the input shaft 16 and the continuously variable transmission mechanism 20 by engaging the belt traveling clutch Cb. . Further, when the belt traveling clutch Cb is released, the power transmission from the continuously variable transmission mechanism 20 to the output shaft 18 is cut off.

  The gear mechanism 22 includes a drive gear 26 and a driven gear 32 provided on the counter shaft 38 so as not to rotate relative to the counter shaft 38. The counter shaft 38 is supported by the case 12 so as to be rotatable about the third axis C3. An idler gear 40 is provided on the counter shaft 38 so as to be rotatable relative to the counter shaft 38. A meshing clutch D is provided between the counter shaft 38 and the idler gear 40 to selectively connect and disconnect them. The idler gear 40 is meshed with an input gear 42 that is provided so as not to rotate relative to the output shaft 18.

  In the transmission 10 configured as described above, when the forward clutch Ca is engaged and the meshing clutch D is connected, the torque of the engine 11 is output via the forward / reverse switching mechanism 28 and the gear mechanism 22 to the output shaft. 18 is transmitted. When the belt running clutch Cb is engaged, the torque of the engine 11 is transmitted to the output shaft 18 via the continuously variable transmission mechanism 20.

  As shown in FIG. 2, the transmission 10 is provided with a torque detection device (vehicle torque detection device) 44 that detects torque input from the engine 11. Note that the torque detection device 44 has a signal (for example, an input shaft 16 corresponding to a torque transmitted from the engine 11) from a strain gauge (torque detection element) 46 fixed to the outer peripheral surface 16b of the input shaft 16 with an adhesive or the like. The electric quantity (voltage) indicating the torsion amount is obtained in a non-contact manner using the stator antenna 48a fixed to the case 12 as a non-rotating member and the rotor antenna 48b fixed to the fixed sheave 24a as a rotating member. Is.

  As shown in FIGS. 2 and 3, the torque detection device 44 includes a first wiring 50 disposed on the input shaft 16, a second wiring 52 disposed on the fixed sheave 24 a of the primary pulley 24, and an input. A wiring connection device 54 is provided for electrically connecting the first wiring 50 and the second wiring 52 at the shaft end of the shaft 16 on the fixed sheave 24a side and the shaft end of the fixed sheave 24a on the input shaft 16 side. ing. The wiring connection device 54 includes a first connector 56 to which the first wiring 50 is connected and fixed to the spline fitting protrusion 16a of the input shaft 16, and a second connector 52 to which the first wiring 50 is connected and spline fitting to the fixed sheave 24a. And a second connector 58 fixed to the bottom 24e of the joint hole 24b. When the spline fitting protrusion 16a of the input shaft 16 is fitted into the spline fitting hole 24b formed in the fixed sheave 24a. The first connector 56 and the second connector 58 are electrically connected.

  As shown in FIGS. 3 to 5, the first connector 56 of the wiring connection device 54 is connected to the first wiring 50 and is formed in a circle centered on the first axis C <b> 1. And a second circular electrode (circular electrode) 62 connected to the first wiring 50 and formed in an annular shape centering on the first axis C1, and a first circular shape fixed to the spline fitting protrusion 16a of the input shaft 16. And a columnar first electrode support member 64 that supports the electrode 60 and the second circular electrode 62 in an electrically insulated state. In addition, the 1st circular electrode 60 and the 2nd circular electrode 62 are comprised by electroconductive metal films, such as copper, aluminum, gold foil, for example, and the 1st electrode support member 64 is glass epoxy, ceramics, etc., for example. It is comprised by.

  As shown in FIGS. 3, 6, and 7, the second connector 58 of the wiring connection device 54 is connected to the second wiring 52 and is involved in the relative rotation around the first axis C1 between the input shaft 16 and the fixed sheave 24a. First, a plurality of (four in this embodiment) first rod-shaped electrodes (rod-shaped electrodes) 66 positioned at a position in contact with the first circular electrode 60 and the second wiring 52 are connected to the input shaft 16 and the fixed sheave. A plurality of (four in this embodiment) second rod-shaped electrodes (rod-shaped electrodes) 68 positioned in contact with the second circular electrode 62 regardless of relative rotation around the first axis C1 with respect to 24a; A circle fixed to the bottom 24e of the spline fitting hole 24b of the fixed sheave 24a and supporting the first rod-shaped electrode 66 and the second rod-shaped electrode 68 so as to be movable in the direction of the first axis C1 and electrically insulated. A columnar second electrode support member 70; Provided in a plurality (four in this embodiment) of first receiving holes 70a that respectively accommodate a plurality of first rod-shaped electrodes 66 formed on the two-electrode support member 70, and the first rod-shaped electrode 66 is a first circular electrode. A plurality of (four in this embodiment) each housing a coiled first spring (spring) 72 urging toward 60 and a plurality of second rod-shaped electrodes 68 formed on the second electrode support member 70. And a coil-shaped second spring (spring) 74 that urges the second rod-shaped electrode 68 toward the second circular electrode 62. The second electrode support member 70 is made of, for example, glass epoxy, ceramics, etc., and the first rod-shaped electrode 66 and the second rod-shaped electrode 68 are, for example, conductive and lubricous, such as iron, carbon, and graphite. There is something. Further, as shown in FIG. 6, the four (even number) first rod-shaped electrodes 66 are arranged symmetrically with respect to the first axis C1 in the first axis C1 direction, and four (even numbers). The second rod-shaped electrodes 68 are arranged symmetrically with respect to the first axis C1 in the first axis C1 direction.

  FIG. 4 shows a contact A1 where the first rod-shaped electrode 66 contacts the first circular electrode 60, and the contact A1 when the input shaft 16 and the fixed sheave 24a are relatively rotated around the first axis C1. A first trajectory L1 that is a trajectory is indicated by a one-dot chain line. As shown in FIG. 4, since the first locus L1 is circular and the first circular electrode 60 is formed in a circle, the first rod-shaped electrode 66 is disposed at a position in contact with the first circular electrode 60. As a result, the first rod-like electrode 66 can be positioned at a position in contact with the first circular electrode 60 regardless of the relative rotation of the input shaft 16 and the fixed sheave 24a around the first axis C1. Further, FIG. 4 shows a contact A2 where the second rod-shaped electrode 68 contacts the second circular electrode 62. When the input shaft 16 and the fixed sheave 24a are relatively rotated around the first axis C1, the contact A2 is shown. A second locus L2, which is the locus of the contact A2, is indicated by a one-dot chain line. As shown in FIG. 4, since the second locus L2 is circular and the second circular electrode 62 is formed in an annular shape, the second rod-shaped electrode 68 is disposed at a position in contact with the second circular electrode 62. By doing so, the second rod-shaped electrode 68 can be positioned at a position in contact with the second circular electrode 62 regardless of the relative rotation of the input shaft 16 and the fixed sheave 24a around the first axis C1.

  The strain gauge 46 is, for example, one in which a pair of gauge leads as lead lines is attached to a relatively thin resin electrical insulator made of a grid-like metal foil by photoetching. Further, as shown in FIGS. 2, 3, and 5, the first wiring 50 is configured such that the plus-side gauge lead of the pair of gauge leads provided in the strain gauge 46 is first connected via a telemeter amplifier 76. A plus-side wiring 50a (see FIG. 5) electrically connected to the circular electrode 60 and a minus-side gauge lead of the pair of gauge leads provided in the strain gauge 46 are connected to the second circle via a telemeter amplifier 76. And a negative-side wiring 50 b electrically connected to the electrode 62. The telemeter amplifier 76 has a built-in power supply, and the first electrode support member 64 is fixed to a fixed case 78 that fixes the telemeter amplifier 76 to the input shaft 16. As shown in FIGS. 2, 3, and 7, the second wiring 52 includes a plus-side wiring 52a that electrically connects the rotor antenna 48b fixed to the fixed sheave 24a to the first rod-shaped electrode 66, and a rotor. And a minus-side wiring 52 b that electrically connects the antenna 48 b to the second rod-shaped electrode 68.

  FIG. 8 is a diagram illustrating an operation of electrically connecting the first connector 56 connected to the first wiring 50 and the second connector 58 connected to the second wiring 52 in the torque detection device 44. . As shown in FIG. 8, when the first wiring 50 and the second wiring 52 are electrically connected, the spline fitting protrusion 16a of the input shaft 16 is inserted into the spline fitting hole 24b formed in the fixed sheave 24a. When fitted, the first circular electrode 60 and the second circular electrode 62 supported by the first electrode support member 64 fixed to the spline fitting protrusion 16a of the input shaft 16 become the first rod electrode 66 and the second rod shape. The first rod-shaped electrode 66 and the second rod-shaped electrode 68 are in contact with the electrodes 68, respectively, and the ends of the fixed sheave 24a opposite to the input shaft 16 side against the urging force of the first spring 72 and the second spring 74. Move in the direction approaching the part. For this reason, the first rod electrode 66 and the second rod electrode 68 press the first circular electrode 60 and the second circular electrode 62, respectively, by the elastic restoring force of the first spring 72 and the second spring 74, so that the first wiring 50 And the second wiring 52 are electrically connected.

  As described above, according to the torque detection device 44 of the present embodiment, when the shaft end portion of the input shaft 16 and the shaft end portion of the fixed sheave 24a are fitted to each other, the first fixed to the input shaft 16 is provided. The first circular electrode 60 and the second circular electrode 68 supported by the first circular electrode 60 and the second circular electrode 62 supported by the one electrode support member 64 and the second electrode support member 70 fixed to the fixed sheave 24a. Are in contact with each other, and the first rod electrode 66 and the second rod electrode 68 are urged toward the first circular electrode 60 and the second circular electrode 62 by the first spring 72 and the second spring 74, respectively. For example, when connecting the first wiring 50 and the second wiring 52 with solder, the first wiring 50 and the second wiring 52 can be electrically connected with higher reliability than in the prior art. The first circular electrode 60 is formed in a circle centered on the first axis C1, the second circular electrode 62 is formed in an annular shape centered on the first axis C1, and the first rod-shaped electrode 66 is Regardless of the relative rotation between the input shaft 16 and the fixed sheave 24a, the second rod-shaped electrode 68 is positioned in contact with the first circular electrode 60 regardless of the relative rotation between the input shaft 16 and the fixed sheave 24a. Since the two circular electrodes 62 are positioned so as to be in contact with each other, the shaft end of the input shaft 16 and the shaft of the fixed sheave 24a are not aligned with the rotational phase of the input shaft 16 and the fixed sheave 24a around the first axis C1. Even if the end portions are fitted to each other, the first rod electrode 66 is in contact with the first circular electrode 60 and the second rod electrode 68 is in contact with the second circular electrode 62 so that the first wiring 50 and the second wiring 52 is electrically connected. As a result, when the first wiring 50 and the second wiring 52 are electrically connected, the first wiring 50 and the second wiring without matching the rotational phase around the first axis C1 between the input shaft 16 and the fixed sheave 24a. 52 can be electrically connected, so that the workability when connecting the first wiring 50 and the second wiring 52 is improved.

  Further, according to the torque detector 44 of the present embodiment, the spline fitting protrusion 16a is formed at the shaft end of the input shaft 16, and the spline fitting protrusion 16a is formed at the shaft end of the fixed sheave 24a. A spline fitting hole 24b is formed, a first connector 56 is fixed to the spline fitting protrusion 16a, and a second connector 58 is fixed to the bottom 24e of the spline fitting hole 24b. Has been. For this reason, the first connector 56 and the spline fitting protrusion 16a formed at the shaft end of the input shaft 16 are fitted into the spline fitting hole 24b formed at the shaft end of the fixed sheave 24a. Since the second connector 58 is electrically connected, workability when connecting the first wiring 50 and the second wiring 52 is preferably improved.

  Further, according to the torque detection device 44 of the present embodiment, four first rod-shaped electrodes 66 are provided, and the four first rod-shaped electrodes 66 are symmetrical with respect to the first axis C1 in the first axis C1 direction. Four second rod-shaped electrodes 68 are provided, and the four second rod-shaped electrodes 68 are disposed symmetrically with respect to the first axis C1 in the first axis C1 direction. For this reason, the vibration generated from the fixed sheave 24a when the fixed sheave 24a rotates around the first axis C1 is preferably reduced.

  Next, another embodiment of the present invention will be described. In addition, the same code | symbol is attached | subjected to the part which is common in above-mentioned Example 1, and description is abbreviate | omitted.

  9 to 12 are diagrams for explaining a torque detection device (vehicle torque detection device) according to another embodiment of the present invention. The torque detection device of the present embodiment is provided with a first connector 80 provided with one plus-side wiring 50a and one minus-side wiring 50b, compared to the torque detection device 44 of the first embodiment, The difference is that a second connector 82 provided with one first rod-shaped electrode 66 and one second rod-shaped electrode 68 is provided, and the others are substantially the same as the torque detection device 44 of the first embodiment. .

  As mentioned above, although the Example of this invention was described in detail based on drawing, this invention is applied also in another aspect.

  For example, in the above-described embodiment, the torque detection device 44 is applied to the transmission 10 including the belt-type continuously variable transmission mechanism 20, the gear mechanism 22, and the like. The present invention may be applied to other automatic transmissions.

  In the above-described embodiment, the spline fitting protrusion 16a is provided at the shaft end of the input shaft 16, and the spline fitting hole 24b is provided at the shaft end of the fixed sheave 24a. The spline fitting hole 24b may be provided at the shaft end of the shaft 16, and the spline fitting protrusion 16a may be provided at the shaft end of the fixed sheave 24a. When the spline fitting hole 24b is provided at the shaft end of the input shaft 16 and the spline fitting protrusion 16a is provided at the shaft end of the fixed sheave 24a, the first connector 56 is attached to the fixed sheave 24a. The structure of the wiring connection device 54 may be changed so that the second connector 58 is provided on the input shaft 16.

  In the above-described embodiment, in the torque detection device 44, the signal from the strain gauge 46 is transmitted to the stator antenna 48a fixed to the case 12 as a non-rotating member and the rotor antenna fixed to the fixed sheave 24a as a rotating member. Although it was acquired without contact using 48b, for example, a signal from the strain gauge 46 may be acquired using a slip ring instead of the stator antenna 48a and the rotor antenna 48b. In this case, the telemeter amplifier 76 is not necessary.

  In the above-described embodiment, in the torque detector 44, the first circular electrode 60 is formed in a circle centered on the first axis C1, but is formed in an annular shape centered on the first axis C1, for example. You may do it.

  The above description is only an embodiment, and the present invention can be implemented in variously modified and improved forms based on the knowledge of those skilled in the art.

16: Input shaft (first rotating member)
24a: fixed sheave (second rotating member)
44: Torque detection device (vehicle torque detection device)
46: Strain gauge (torque detection element)
50: first wiring 52: second wiring 54: wiring connection device 56, 80: first connector 58, 82: second connector 60: first circular electrode (circular electrode)
62: Second circular electrode (circular electrode)
64: 1st electrode support member 66: 1st rod-shaped electrode (bar-shaped electrode)
68: Second rod-shaped electrode (bar-shaped electrode)
70: Second electrode support member 72: First spring (spring)
74: Second spring (spring)
C1: First axis (rotation axis)

Claims (1)

A first rotating member and a second rotating member that are integrally rotated around the common rotation axis by being fitted to each other at one of a plurality of fitting positions around a common rotation axis at shaft end portions that are close to each other. A wiring connection device that electrically connects the first wiring and the second wiring at the shaft end portions of the first wiring and the second wiring respectively disposed on the rotating member, and the first rotating member and the second rotating member. A vehicle torque detection device for acquiring a signal from a torque detection element via the first wiring and the second wiring,
The wiring connection device
A circular electrode that is connected to a first wiring disposed on the first rotating member and is formed in a circle or annulus around the rotation axis, and fixed to the first rotating member, the circular electrode being electrically connected A first connector having a first electrode support member for supporting in an electrically insulated state;
A rod-like electrode connected to a second wiring disposed on the second rotating member and positioned at a position in contact with the circular electrode regardless of relative rotation between the first rotating member and the second rotating member; A second electrode support member fixed to the second rotation member and supporting the rod-like electrode in a state of being electrically insulated while being movable in the direction of the rotation axis, and provided on the second electrode support member, And a second connector having a spring for urging the rod-shaped electrode toward the circular electrode.

Images