JP2021080948A - Switch-type one-way clutch device for vehicle - Google Patents

Abstract

To provide a switch-type one-way clutch device for a vehicle that reduces backlash quantity without increasing the size of components.SOLUTION: A second recess portion 98a has a rotary-body side engagement surface 116a that engages with a tip portion 120a of an engagement plate 86a. The rotary-body side engagement surface 116a has a first step portion 130 and a second step portion 132 that change in the axis C direction and the circumferential direction, such that the second recess portion 98a engages with the tip portion 120a of the engagement plate 86a at multiple positions. Accordingly, compared to a case where the second recess portion 98a does not engage with the tip portion 120a of the engagement plate 86a at multiple positions, it is possible to reduce the distance between the engagement positions of the tip portion 120a of the engagement plate 86a and the second recess portion 98a of two adjacent second recess portions 98a of a plurality of second recess portions 98a, that is, the maximum backlash quantity P.SELECTED DRAWING: Figure 3

Description

The present invention relates to an engaging device, particularly to a vehicle switching type one-way clutch device.

A first rotating body having a first surface rotatably provided around the rotation center line and having a plurality of first recesses formed along the circumferential direction, and a first rotating body that rotates relative to the first rotating body around the rotation center line. A plurality of second rotating bodies that are possibly provided, have a plurality of second recesses formed and have a second surface facing the first surface, and a plurality of engaging plate materials housed in the plurality of first recesses, respectively. A plurality of elastics that are each housed in the first recess and urge the tip of the engaging plate to the second rotating body side in a state where the base ends of the plurality of engaging plates are engaged in the first recess. The tip of the engaging plate is movably provided on the second rotating body in the direction of the center line of rotation in a state of being in contact with the body and the tips of a plurality of engaging plates, and the tip of the engaging plate resists the urging force of the elastic body. For vehicles including a non-engaging position that is pushed into the first recess and an annular member that projects the tip of the engaging plate material from the first recess and is positioned at a unidirectional engaging position that allows engagement with the second recess. A switching type one-way clutch device is known. For example, the switching type one-way clutch device for a vehicle described in Patent Document 1 is one of them.

In the vehicle switching type one-way clutch device described in Patent Document 1, relative rotation of the first rotating body and the second rotating body is allowed in a state where the annular member is operated to the non-engaging position by the actuator, and the annular member. Is operated to the unidirectional engaging position by the actuator, the relative rotation of the first rotating body and the second rotating body in one direction is prevented. In the vehicle switching type one-way clutch device described in Patent Document 1, the tip end portion of the engaging plate material is engaged with the second recessed portion in a state where the base end portion of the engaging plate material is engaged in the first recessed portion. This prevents the relative rotation of the first rotating body and the second rotating body in one direction, and can transmit the power acting in one direction, for example, the vehicle forward direction, to the drive wheels.

JP-A-2018-155329

By the way, in the switching type one-way clutch device for a vehicle described in Patent Document 1, a plurality of relatively rotatable engaging plate members and a plurality of second recesses are engaged with each other, for example, among the plurality of second recesses. The distance between the adjacent second recesses is the amount of play. When the amount of rattling becomes large, the shock and rattling noise at the time of engagement become large. In order to reduce the amount of backlash, it is necessary to increase the number of the second recesses and reduce the distance between the adjacent second recesses, but the large diameter of the second rotating body in which the second recesses are formed is large. That is, it is necessary to increase the size of the switching type one-way clutch device for vehicles. Since the switching type one-way clutch device for vehicles described in Patent Document 1 has restrictions in the radial direction due to its structure, it may not be possible to cope with an increase in the diameter of the second rotating body in the radial direction. The shock and rattling noise could be louder. That is, it has been difficult to reduce the amount of backlash without increasing the size of the parts constituting the vehicle switching type one-way clutch device, for example, the second rotating body in the radial direction.

The present invention has been made in the background of the above circumstances, and an object of the present invention is to provide a switching type one-way clutch device for a vehicle that reduces the amount of backlash without enlarging the components. is there.

The gist of the present invention is a first rotating body having a first surface rotatably provided around a rotation center line and having a plurality of first recesses formed along the circumferential direction, and the first rotating body. A second rotating body which is provided so as to be relatively rotatable around the rotation center line, has a plurality of second recesses formed therein, and has a second surface facing the first surface, and the inside of the plurality of first recesses. Each of the plurality of engaging plate materials housed in the above and the plurality of engaging plate materials housed in the first recesses, and the base end portions of the plurality of engaging plate materials are engaged in the first recesses. The tip of the plate material is moved to the second rotating body in the direction of the rotation center line while being in contact with the plurality of elastic bodies for urging the second rotating body side and the tips of the plurality of engaging plate materials. A non-engaging position that is possibly provided and pushes the tip of the engaging plate material into the first recess against the urging force of the elastic body and the tip of the engaging plate that protrudes from the first recess. An annular member positioned at a unidirectional engaging position capable of engaging with the second recess is provided, and in a state where the annular member is operated to a non-engaging position by an actuator, the first rotating body and the said. For vehicles in which the relative rotation of the second rotating body is allowed and the relative rotation of the first rotating body and the second rotating body in one direction is prevented in a state where the annular member is operated to the engaging position by the actuator. A switching type one-way clutch device, in which an engaging surface that engages with the tip of the engaging plate material of the second recess and an engaging surface that engages with the second recess of the tip of the engaging plate material. At least one of the surfaces is provided with a step that changes in the rotation center line direction and the circumferential direction, and engagement positions between the second recess and the tip end portion of the engagement plate material are provided at a plurality of locations. To be there.

According to the vehicle switching type one-way clutch device of the present invention, the engaging surface that engages with the tip of the engaging plate material of the second recess and the second recess of the tip of the engaging plate material. At least one of the engaging surfaces to be engaged is provided with a step that changes in the rotation center line direction and the circumferential direction, and there are a plurality of engaging positions between the second recess and the tip end portion of the engaging plate material. It is provided in a place. As a result, the distance between the engaging positions in the adjacent second recesses among the plurality of second recesses can be reduced as compared with the case where the engaging positions are not provided at the plurality of locations. Therefore, for example, the amount of backlash in the vehicle switching type one-way clutch device can be reduced without increasing the size of the second rotating body, and the shock and rattling noise generated in the engagement of the vehicle switching type one-way clutch device can be reduced. It can be suppressed.

It is a schematic diagram which shows the schematic structure of the vehicle provided with the switching type one-way clutch device for a vehicle of this invention. It is an enlarged view which shows the part of the main part of the power transmission device for a vehicle of FIG. 1 enlarged. FIG. 5 is a cross-sectional view showing a part of the vehicle switching type one-way clutch device of FIG. 1 cut along the circumferential direction. FIG. 3 is a cross-sectional view showing a part of the vehicle switching type one-way clutch device of FIG. 1 cut along the circumferential direction, and is a view showing a mode different from that of FIG. FIG. 5 is a cross-sectional view showing a part of the vehicle switching type one-way clutch device of FIG. 1 cut along the circumferential direction, and shows a cross-sectional view taken at a position different from that of FIGS. 3 and 4. FIG. 1 is an enlarged schematic view showing a part of a main part of a switching type one-way clutch device for a vehicle shown in FIG. It is a schematic diagram which enlarges and shows a part of the main part of the conventional switching type one-way clutch device for a vehicle. It is a schematic diagram which shows the part of the main part of the switching type one-way clutch device for a vehicle of FIG. 1 in an enlarged manner, and is the figure which shows the aspect different from FIG. It is a schematic diagram which enlarged and shows a part of the main part of the switching type one-way clutch device for a vehicle corresponding to another embodiment of this invention.

The present invention is applied to a hybrid vehicle having a traveling rotary machine, that is, a driving motor as a driving force source for traveling, an electric vehicle, and the like. The vehicle to which the present invention is applied may be provided with, for example, an FF (front engine / front drive) type, FR (front engine / rear drive) type, or a four-wheel drive type power transmission device.

Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings. In the following examples, the drawings are appropriately simplified or deformed, and the dimensional ratios and shapes of each part are not necessarily drawn accurately.

FIG. 1 is a schematic view showing a schematic configuration of a vehicle 12 provided with a vehicle power transmission device 10 (hereinafter, referred to as a power transmission device 10) according to an embodiment of the present invention. The vehicle 12 includes a power transmission device 10 that transmits the power of the engine 14 to the drive wheels 16. The power transmission device 10 is provided between the engine 14 and the drive wheels 16.

The power transmission device 10 includes, for example, in a case 18 as a non-rotating member, a torque converter 20, an input shaft 22 connected to the torque converter 20, and a belt-type continuously variable transmission 24 connected to the input shaft 22. A forward / backward switching device 26 and a gear mechanism 28 provided in parallel with the continuously variable transmission 24 via the forward / backward switching device 26 are provided. Further, the power transmission device 10 is unable to rotate relative to the output shaft 30, the deceleration counter shaft 32, the output shaft 30 and the deceleration counter shaft 32, which are common output rotating members of the stepless transmission 24 and the gear mechanism 28, respectively. A reduction gear device 34 composed of a pair of gears provided and meshed with each other, a gear 36 provided on the reduction counter shaft 32 so as not to rotate relative to each other, a differential device 38 connected to the gear 36 so as to be able to transmit power, and a differential device 38. It is equipped with left and right axles 40 connected to.

The gear mechanism 28 includes a small-diameter gear 48, a counter shaft 50, and a large-diameter gear 52 that is rotatably provided on the counter shaft 50 and meshes with the small-diameter gear 48. Further, the counter shaft 50 is provided with a counter gear 54 that meshes with the output gear 56 provided on the output shaft 30 so as not to rotate relative to the counter shaft 50.

The power or torque output from the engine 14 is transmitted via a first power transmission path PT1 composed of, for example, a torque converter 20, a forward / backward switching device 26, a gear mechanism 28, a reduction gear device 34, a differential device 38, and an axle 40. , Is transmitted to the left and right drive wheels 16. Alternatively, the power output from the engine 14 is transmitted to the left and right drive wheels via, for example, a second power transmission path PT2 composed of a torque converter 20, a continuously variable transmission 24, a reduction gear device 34, a differential device 38, and an axle 40. It is transmitted to 16.

The power transmission device 10 includes a plurality of engagement devices for selectively forming a first power transmission path PT1 or a second power transmission path PT2 for transmitting the power of the engine 14 to the drive wheels 16. The plurality of engaging devices include, for example, a first clutch C1, a first brake B1, a second clutch C2, and a vehicle switching type one-way clutch device SOWC.

The first clutch C1 is provided on the first power transmission path PT1 and is an engagement device for selectively connecting or disconnecting the first power transmission path PT1 and engages when the vehicle travels forward. This is an engaging device that enables power transmission of the first power transmission path PT1. The first brake B1 is provided on the first power transmission path PT1 and is an engagement device for selectively connecting or disconnecting the first power transmission path PT1 and engages when the vehicle travels backward. This is an engaging device that enables power transmission of the first power transmission path PT1. The first power transmission path PT1 is formed by engaging the first clutch C1 or the first brake B1.

The second clutch C2 is an engaging device provided in the second power transmission path PT2 for selectively connecting or disconnecting the second power transmission path PT2, and by engaging the second clutch C2 when the vehicle travels forward. , An engaging device that enables power transmission of the second power transmission path PT2. The first clutch C1, the first brake B1, and the second clutch C2 are all hydraulic wet friction engagement devices that are frictionally engaged by a hydraulic actuator. The first clutch C1 and the first brake B1 are one of the elements constituting the forward / backward switching device 26, respectively.

The vehicle switching type one-way clutch device SOWC (hereinafter referred to as mode switching clutch SOWC) is provided in the first power transmission path PT1 and transmits the power acting in the vehicle forward direction while transmitting the power acting in the vehicle reverse direction. It is configured to be switchable between a one-way mode that shuts off and a lock mode that transmits power acting in the vehicle forward direction and the vehicle reverse direction.

For example, when the mode switching clutch SOWC is switched to the one-way mode and the power acting in the vehicle forward direction is transmitted from the engine 14 to the mode switching clutch SOWC, the power is driven via the mode switching clutch SOWC. It is transmitted to the wheel 16. On the other hand, when the mode switching clutch SOWC is switched to the one-way mode and the power acting in the vehicle reverse direction is transmitted from the engine 14 to the mode switching clutch SOWC, the power is cut off by the mode switching clutch SOWC.

When the mode switching clutch SOWC is switched to the lock mode and the power acting in the vehicle forward direction is transmitted from the engine 14 to the mode switching clutch SOWC, the power is transmitted to the drive wheels via the mode switching clutch SOWC. It is transmitted to 16. Further, when the mode switching clutch SOWC is switched to the lock mode and the power acting in the vehicle reverse direction is transmitted from the engine 14 to the mode switching clutch SOWC, the power is transmitted via the mode switching clutch SOWC. It is transmitted to the drive wheels 16.

FIG. 2 is an enlarged cross-sectional view showing a part of a main part of the power transmission device 10. Specifically, FIG. 2 is an enlarged cross-sectional view showing a part of the gear mechanism 28 in the power transmission device 10, and is a cross-sectional view for explaining the structure of the mode switching clutch SOWC. Note that FIG. 2 shows a part of the upper half of the counter shaft 50 on one end side. The axis C shown in FIG. 2 is the rotation center line of the counter shaft 50 and indicates the axis C.

As shown in FIG. 2, the counter shaft 50 is provided with a first bearing 60a on one end side and a second bearing 60b on the other end side. The counter shaft 50 is rotatably supported around the axis C by the case 18 via, for example, a first bearing 60a and a second bearing 60b. The counter shaft 50 is provided with a counter gear 54 on the other end side of the first bearing 60a. The counter gear 54 is formed in an annular shape, and its inner peripheral portion is fixed to the outer peripheral surface of the counter shaft 50 so that it cannot rotate relative to the outer peripheral surface of the counter shaft 50 and cannot move relative to the axis C direction.

The counter shaft 50 is provided with an actuator 80 on the side opposite to the first bearing 60a in the axis C direction with respect to the counter gear 54, that is, on the other end side of the counter gear 54. A mode switching clutch SOWC is arranged on the other end side of the actuator 80. The mode switching clutch SOWC and the actuator 80 are provided on the outer peripheral side of the counter shaft 50. The inner peripheral side of the large-diameter gear 52 functions as the first rotating body 82, which will be described later, constitutes the mode switching clutch SOWC. That is, the large diameter gear 52 and the first rotating body 82 of the mode switching clutch SOWC are integrally molded.

The actuator 80 axes the pressing piston 62, a plurality of coil springs 64 inserted between the counter gear 54 and the pressing piston 62 in the axis C direction, and the pressing piston 62 by supplying hydraulic oil. It is a hydraulic actuator including a hydraulic chamber 72 that generates a thrust force that moves the counter gear 54 side in the C direction. The mode switching clutch SOWC and the actuator 80 are both arranged on the rotation center line of the counter shaft 50, that is, on the axis C. That is, the mode switching clutch SOWC and the actuator 80 are concentrically arranged on the counter shaft 50. The mode switching clutch SOWC and the actuator 80 are provided on the outer peripheral side of the counter shaft 50. The large-diameter gear 52, the counter gear 54, the mode switching clutch SOWC, and the actuator 80 are substantially symmetrical with respect to the axis C. The coil spring 64 urges the pressing piston 62 in the direction from one end side to the other end side of the counter shaft 50, that is, in the direction away from the counter gear 54. The hydraulic chamber 72 is an oil-tight space formed by being surrounded by the pressing piston 62 and the counter shaft 50. The hydraulic oil is supplied to the hydraulic chamber 72 via an oil passage 68 formed inside the counter shaft 50.

The mode switching clutch SOWC is arranged at a position adjacent to the first rotating body 82 formed on the inner peripheral side of the large diameter gear 52 and the first rotating body 82 in the axis C direction of the counter shaft 50. It is composed of a rotating body 84, a plurality of engaging plate members 86a and 86b interposed between the first rotating body 82 and the second rotating body 84, and a plurality of elastic bodies 88a and 88b. There is. A bearing 90 that holds the first rotating body 82 and the second rotating body 84 so as to be relatively rotatable is interposed between the inner peripheral surface of the large-diameter gear 52 and the outer peripheral surface of the second rotating body 84. .. For the elastic bodies 88a and 88b, for example, a torsion coil spring is used.

The first rotating body 82 is formed in a disk shape, for example, and is arranged so as to be rotatable relative to the counter shaft 50 about the axis C. The first rotating body 82 is arranged so as to be sandwiched between the second rotating body 84 and the second bearing 60b in the axis C direction. The first rotating body 82 is formed on the inner peripheral side of the large-diameter gear 52, and is connected to the engine 14 via a gear mechanism 28, a forward / backward switching device 26, and the like so as to be able to transmit power.

First recesses 94a and 94b in which the engaging plate member 86a and the elastic body 88a are housed are formed on the first surface 92 of the first rotating body 82 facing the second rotating body 84 in the axis C direction, respectively. Specifically, the first surface 92 is formed with a first concave portion 94a on the outer side in the radial direction and a first concave portion 94b formed on the inner side in the radial direction, and the first concave portions 94a and 94b are formed in the radial direction, for example. It is formed so as to be adjacent to each other.

The second rotating body 84 is, for example, an annular member having an L-shaped cross section, and is between the flange portion 50a protruding in the radial direction from the outer peripheral surface of the counter shaft 50 in the axis C direction and the first rotating body 82. It is arranged so as to be sandwiched between. The inner peripheral portion of the second rotating body 84 is spline-fitted to the counter shaft 50. By rotating integrally with the counter shaft 50, the second rotating body 84 is connected to the drive wheels 16 so as to be able to transmit power via the counter gear 54, the output gear 56, the output shaft 30, the differential device 38, and the like. ..

The second surface 96 of the second rotating body 84 facing the first surface 92 of the first rotating body 82 in the axis C direction has second recesses 98a and 98b recessed on the side away from the first rotating body 82. It is formed. Specifically, the first surface 92 is formed with a second recess 98a on the outer side in the radial direction and a second recess 98b on the inner side in the radial direction, and the second recesses 98a and 98b are formed in the radial direction, for example. It is formed so as to be adjacent to each other.

The second recesses 98a are formed in the same number as the first recesses 94a, and are arranged at equal angular intervals in the circumferential direction. The second recess 98a is formed at the same position as the first recess 94a in the radial direction. That is, when the rotation positions of the first recess 94a and the second recess 98a match, as shown in FIG. 2, the first recess 94a and the second recess 98a are adjacent to each other in the axis C direction. It becomes.

The second recesses 98b are formed in the same number as the first recesses 94b, and are arranged at equal angular intervals in the circumferential direction. The second recess 98b is formed at the same position as the first recess 94b in the radial direction. That is, when the rotation positions of the first recess 94b and the second recess 98b match, as shown in FIG. 2, the first recess 94b and the second recess 98b are adjacent to each other in the axis C direction. It becomes.

A plurality of through holes 100 parallel to the axis C direction are formed in the second rotating body 84. The through hole 100 penetrates the second rotating body 84 in the axis C direction. Further, each through hole 100 is formed at a position overlapping each second recess 98a when viewed in the axis C direction of the counter shaft 50. That is, one end of each through hole 100 communicates with the second recess 98a. A pin 102 is inserted through each through hole 100. The pin 102 is formed in a columnar shape and is slidable in the through hole 100. One end of the pin 102 is brought into contact with the pressing piston 62 constituting the actuator 80, and the other end of the pin 102 is brought into contact with the annular member 104 housed in the second recess 98a. Has been done.

The annular member 104 is formed in the second rotating body 84 and is fitted in a plurality of arcuate grooves 106, which will be described later, and is movable relative to the second rotating body 84 in the axis C direction. .. That is, for example, when the pin 102 is pushed by the pressing piston 62 and moved to the through hole 100 toward the first rotating body 82 in the axis C direction, the annular member 104 is pushed by the pin 102 and the first in the axis C direction. It is moved to the rotating body 82 side.

3 and 4 are cross-sectional views showing a part of the mode switching clutch SOWC cut along the circumferential direction at the position indicated by the alternate long and short dash line A. FIG. 5 is a cross-sectional view showing a part of the mode switching clutch SOWC cut along the circumferential direction at the position indicated by the alternate long and short dash line B. FIG. 3 shows a state in which the mode switching clutch SOWC is switched to the one-way mode, and FIG. 4 shows a state in which the mode switching clutch SOWC is switched to the lock mode. The vertical direction of the paper surface in FIGS. 3 and 4 corresponds to the rotation direction, the lower part of the paper surface corresponds to the vehicle reverse direction, that is, the reverse rotation direction, and the upper part of the paper surface corresponds to the vehicle forward direction, that is, the forward rotation direction. Further, the left-right direction of the paper surface in FIGS. 3 and 4 corresponds to the axis C direction of the counter shaft 50, the right side of the paper surface corresponds to the large diameter gear 52 side of FIG. 2, and the left side of the paper surface corresponds to the counter gear 54 side of FIG. It corresponds.

As shown in FIGS. 3 and 4, the first recess 94a formed on the first surface 92 of the first rotating body 82 has different opening length dimensions in the circumferential direction in the axis C direction, that is, in the depth direction. The formed first stepped portion 110a is provided. In the first recess 94a, the elastic body 88a is housed in a storage space away from the first surface 92 in the axis C direction from the first stepped portion 110a, and in the axis C direction than the storage space in which the elastic body 88a is housed. The engaging plate member 86a is accommodated in the accommodating space on the first surface 92 side. That is, the elastic body 88a is arranged so as to be interposed between the engaging plate member 86a and the first rotating body 82.

The engaging plate member 86a is made of a plate-shaped member having a predetermined thickness, and is formed so as to extend longitudinally along a rotation direction, that is, a circumferential direction. The engaging plate member 86a has a predetermined dimension in the direction perpendicular to the paper surface in FIGS. 3 and 4, that is, in the radial direction in FIG.

One end of the engaging plate member 86a in the longitudinal direction, that is, the tip end portion 120a of the engaging plate member 86a is urged toward the second rotating body 84 by the elastic body 88a. The other end of the engaging plate member 86a in the longitudinal direction, that is, the base end portion 122a of the engaging plate member 86a is brought into contact with the first stepped portion 110a formed in the first concave portion 94a. That is, the engaging plate member 86a is rotatable about the base end portion 122a that engages with the first stepped portion 110a.

As shown in FIGS. 3 and 4, the second recess 98a formed on the second surface 96 of the second rotating body 84 is formed in a shape capable of accommodating the tip portion 120a of the engaging plate member 86a. The tip of the engaging plate member 86a is formed in the second recess 98a when the elastic body 88a is urged toward the second rotating body 84, that is, when the mode switching clutch SOWC shown in FIG. 4 described later is switched to the lock mode. A rotating body-side engaging surface 116a that engages with the portion 120a is formed.

When the mode switching clutch SOWC shown in FIG. 3 is in the one-way mode, the pressing piston 62 is brought into contact with the second rotating body 84 by the urging force of the coil spring 64. At this time, the pin 102 is pushed by the pressing piston 62 and moved toward the first rotating body 82 in the axis C direction, and the annular member 104 is pushed by the pin 102 toward the first rotating body 82 in the axis C direction. Can be moved. The annular member 104 is fitted into an arcuate groove 106 formed in the second rotating body 84 so as to connect the second recesses 98a adjacent to each other in the circumferential direction. As a result, the tip portion 120a of the engaging plate member 86a is pressed by the annular member 104 and moved to the first rotating body 82 side, so that the movement to the second concave portion 98a side is prevented and the second concave portion 98a rotates. Engagement with the body-side engaging surface 116a is prevented. In this case, relative rotation between the first rotating body 82 and the second rotating body 84 is allowed. That is, in FIG. 3, the pin 102 is moved to the side of the first rotating body 82 most in the axis C direction, and the annular member 104 makes the tip portion 120a of the engaging plate member 86a resist the urging force of the elastic body 88a. It shows a state in which the first rotating body 82 and the second rotating body 84 are allowed to rotate relative to each other in a non-engaging position in which the first rotating body 82 is pushed into the recess 94a.

In the locked mode state of the mode switching clutch SOWC shown in FIG. 4, the pressing piston 62 is a second rotating body against the urging force of the coil spring 64 by supplying hydraulic oil to the hydraulic chamber 72 of the actuator 80. It is moved away from 84. At this time, the tip portion 120a of the engaging plate member 86a is moved to the second concave portion 98a side of the second rotating body 84 by the urging force of the elastic body 88a, and can come into contact with the rotating body side engaging surface 116a. As a result, the tip portion 120a of the engaging plate member 86a is engaged with the rotating body-side engaging surface 116a of the second recess 98a. That is, FIG. 4 shows a state in which the annular member 104 is in a unidirectional engaging position in which the tip portion 120a of the engaging plate member 86a protrudes from the first recess 94a and can be engaged with the second recess 98a. It shows a state in which the relative rotation of the 82 and the second rotating body 84 in one direction is blocked.

As shown in FIGS. 2 and 5, the first recesses 94b formed on the first surface 92 of the first rotating body 82 have different opening length dimensions in the circumferential direction in the axis C direction, that is, in the depth direction. The first stepped portion 110b is formed. In the first recess 94b, the elastic body 88b is housed in a storage space away from the first surface 92 in the axis C direction from the first stepped portion 110b, and in the axis C direction than the storage space in which the elastic body 88b is housed. The engaging plate material 86b is accommodated in the accommodating space on the first surface 92 side. That is, the elastic body 88b is arranged so as to be interposed between the engaging plate member 86b and the first rotating body 82.

The engaging plate member 86b is made of a plate-shaped member having a predetermined thickness, and is formed so as to extend longitudinally along a rotation direction, that is, a circumferential direction. The engaging plate material 86b has a predetermined dimension in the direction perpendicular to the paper surface in FIG. 5, that is, in the radial direction in FIG.

One end of the engaging plate member 86b in the longitudinal direction, that is, the tip end portion 120b of the engaging plate member 86b is urged toward the second rotating body 84 by the elastic body 88b. The other end of the engaging plate member 86b in the longitudinal direction, that is, the base end portion 122b of the engaging plate member 86b is brought into contact with the first stepped portion 110b formed in the first recess 94b. The engaging plate member 86b is rotatable around a base end portion 122b that engages with the first stepped portion 110b.

As shown in FIG. 5, the second recess 98b formed on the second surface 96 of the second rotating body 84 is formed in a shape capable of accommodating the tip portion 120b of the engaging plate member 86b. The second recess 98b is formed with a rotating body side engaging surface 116b that engages with the tip portion 120b of the engaging plate member 86b when the first rotating body 82 is rotated in the vehicle forward direction by the power of the engine 14. .. That is, the engaging plate member 86b, the elastic body 88b, the second recess 98b, and the rotating body side engaging surface 116b transmit the power acting in the vehicle forward direction to the drive wheels 16 while blocking the power acting in the vehicle reverse direction. A one-way clutch is configured.

That is, when the mode switching clutch SOWC is in the one-way mode, the tip portion 120b of the engaging plate member 86b can be engaged with the rotating body side engaging surface 116b of the first rotating body 82, so that the mode switching clutch SOWC is engaged with the vehicle in the forward direction. When the force acting on the engaging plate member 86b is transmitted, the tip end portion 120b of the engaging plate member 86b and the rotating body side engaging surface 116b are engaged with each other, and the base end portion 122b of the engaging plate member 86b and the first portion 122b are engaged with each other. When the stepped portion 110b comes into contact with the first rotating body 82, the relative rotation in the vehicle forward direction is prevented between the first rotating body 82 and the second rotating body 84. As a result, when the mode switching clutch SOWC is in the one-way mode, the engaging plate member 86b functions as a one-way clutch and transmits the power acting in the vehicle forward direction to the drive wheels 16, while the power acting in the vehicle reverse direction is transmitted. It is cut off.

When the mode switching clutch SOWC is in the lock mode, when the force acting in the vehicle forward direction is transmitted, the tip portion 120b of the engaging plate member 86b engages with the first rotating body 82 on the rotating body side, as shown in FIG. By engaging with the surface 116b and abutting the base end portion 122b of the engaging plate member 86b with the first stepped portion 110b, the first rotating body 82 and the second rotating body 84 move in the vehicle forward direction. Relative rotation is blocked. Further, when the mode switching clutch SOWC is in the lock mode and the power acting in the vehicle reverse direction is transmitted, the tip portion 120a of the engaging plate member 86a engages with the second rotating body 84 on the rotating body side, as shown in FIG. By engaging with the surface 116a and abutting the base end portion 122b of the engaging plate member 86a with the first stepped portion 110b, the first rotating body 82 and the second rotating body 84 move in the vehicle reverse direction. Relative rotation is blocked. As a result, when the mode switching clutch SOWC is in the lock mode, the engaging plate material 86a and the engaging plate material 86b function as one-way clutches, respectively, and drive the power acting in the vehicle forward direction and the vehicle reverse direction in the mode switching clutch SOWC. It becomes possible to transmit to the wheel 16.

FIG. 6 is an enlarged schematic view showing a part of a main part of the mode switching clutch SOWC, and shows an enlarged view of the periphery of the engaging plate member 86a. As shown in FIG. 6, the rotating body side engaging surface 116a of the second rotating body 84 is provided with a first stepped portion 130 and a second stepped portion 132 that change in the axis C direction and the circumferential direction. Specifically, the rotating body side engaging surface 116a is a circumferential direction, that is, a rotation direction of the first axial wall surface 130a and the second rotating body 84 which are connected to the second surface 96 and extend in a direction away from the second surface 96 in the axis C direction. In this embodiment, a first step portion 130 composed of a first circumferential wall surface 130b extending in the vehicle forward direction and a second step portion 130 connected to the first circumferential wall surface 130b and extending in a direction away from the first circumferential wall surface 130b in the axis C direction. The axial wall surface 132a and the second rotating body 84 include a second step portion 132 including a circumferential direction, that is, a rotation direction, and in this embodiment, a second circumferential wall surface 132b extending in the vehicle forward direction. That is, the second step portion 132 is formed at a position away from the first rotating body 82 in the axis C direction with respect to the first step portion 130.

The rotating body side engaging surface 116a is an engaging surface on which the tip portion 120a of the engaging plate member 86a moved to the second rotating body 84 side by the urging force of the elastic body 88a can be engaged. For example, in the circumferential direction, the first step portion 130 with which the tip portion 120a of the engaging plate member 86a can engage is provided with the first axial wall surface 130a and the second step portion 132 with the second axial wall surface 132a. That is, in this embodiment, the second recess 98a of the second rotating body 84 is provided with a plurality of engaging positions capable of engaging with the tip portion 120a of the engaging plate member 86a. The first axial wall surface 130a is, for example, the first engaging position where the tip portion 120a of the engaging plate material 86a engages in the circumferential direction, and the second axial wall surface 132a is, for example, the engaging plate material in the circumferential direction. This is the second engaging position where the tip portion 120a of 86a engages. The arrow D shown in FIG. 6 is the relative traveling direction of the second rotating body 84 with respect to the first rotating body 82.

P in FIG. 6 is a distance P between adjacent second recesses 98a among the plurality of second recesses 98a formed in the circumferential direction of the second rotating body 84. For example, the distance P is the circumferential distance between the second axial wall surface 132a shown in FIG. 6 and the first axial wall surface 130a1 of the second recess 98a1 adjacent to the second recess 98a in the circumferential direction, that is, each adjacent one. This is the distance between the engagement positions of the tip portion 120a of the engaging plate member 86a and the second recess 98a between the second recesses 98a. For example, the interval P indicates the amount of backlash P in the circumferential direction of the mode switching clutch SOWC, that is, the maximum amount of backlash P, which occurs when the engaging plate member 86a and the second axial wall surface 132a of the second recess 98a are engaged with each other.

FIG. 7 shows a part of a main part of a conventional mode switching clutch SOWC provided with a second rotating body 300 having a plurality of engaging positions capable of engaging with the engaging plate member 86a on the rotating body side engaging surface 302a. It is an enlarged schematic view, and the periphery of the engaging plate material 86a is shown enlarged. P1 in FIG. 7 is a distance P1 between adjacent second recesses 304a among a plurality of second recesses 304a formed in the circumferential direction of the second rotating body 300. For example, the distance P1 is the circumferential distance between the first axial wall surface 306a shown in FIG. 7 and the first axial wall surface 306a1 of the second recess 304a1 adjacent to the second recess 304a in the circumferential direction. The maximum amount of play P1 in the circumferential direction caused by the engagement between the engaging plate member 86a and the first axial wall surface 306a1 of the second recess 98a due to the switching of the mode switching clutch SOWC is shown.

FIG. 8 is an enlarged schematic view showing a part of a main part of the mode switching clutch SOWC, showing a state in which the tip portion 120a of the engaging plate member 86a is engaged with the rotating body side engaging surface 116a. There is. Specifically, FIG. 8 shows a state in which the tip portion 120a of the engaging plate member 86a is engaged with the first axial wall surface 130a of the first step portion 130.

By the way, the power transmission in the mode switching clutch SOWC is performed via the engaging plate material 86a and the second recess 98a. For example, when the backlash amount P, that is, the maximum backlash amount P becomes large, the engaging plate material 86a The shock and rattling noise generated when the second recess 98a is engaged with the second recess 98a becomes louder. Further, for example, when the maximum backlash amount P becomes small, the shock and rattling noise generated in the engagement between the engaging plate member 86a and the second recess 98a become small.

Further, since the frictional force due to the centrifugal force of the engaging plate material 86a changes depending on the vehicle speed, that is, the rotational speed, for example, the moving acceleration from the first rotating body 82 side to the second rotating body 84 side, so-called rising acceleration of the engaging plate material 86a, is high. change. Therefore, when the vehicle speed is high, that is, when the rising acceleration of the engaging plate member 86a is small, the engaging plate member 86a is engaged in the second engagement even when it cannot be engaged in the second axial wall surface 132a, that is, the second engaging position. It becomes possible to engage at the first axial wall surface 130a formed on the side of the first rotating body 82 with respect to the position, that is, the first engaging position. On the other hand, when the vehicle speed is low, that is, when the rising acceleration of the engaging plate member 86a is large, the engaging plate member 86a is formed at a position separated from the first rotating body 82 in the axis C direction from the first engaging position. It can be engaged at the directional wall surface 132a, that is, the second engaging position. That is, for example, when the rising acceleration of the engaging plate member 86a is small, the engaging performance between the tip portion 120a of the engaging plate member 86a and the second recess 98a can be maintained.

In the mode switching clutch SOWC of the present embodiment, the engagement positions of the second recess 98a and the engaging plate member 86a are formed at a plurality of positions, so that the maximum backlash amount P1 in the conventional mode switching clutch SOWC is compared with, for example. The maximum backlash amount P is small when the vehicle speed is low, that is, when the rising acceleration of the engaging plate member 86a is large. That is, in the mode switching clutch SOWC of the present embodiment, the maximum backlash amount P is small and the engaging plate member 86a and the second recess 98a engage with each other. The rattling noise is smaller than the shock or rattling noise generated when the conventional mode switching clutch SOWC is engaged.

As described above, according to the mode switching clutch SOWC of the present embodiment, the rotating body side engaging surface 116a that engages with the tip portion 120a of the engaging plate member 86a of the second recess 98a changes in the axis C direction and the circumferential direction. The first stepped portion 130 and the second stepped portion 132 are provided, and the engaging positions of the second recess 98a and the tip end portion 120a of the engaging plate member 86a are provided at a plurality of locations. As a result, as compared with the case where the engagement positions between the second recess 98a and the tip end portion 120a of the engaging plate member 86a are not provided at a plurality of locations, the adjacent second recesses 98a of the plurality of second recesses 98a are located. In, the distance between the engaging positions of the tip portion 120a of the engaging plate member 86a and the second recess 98a, that is, the maximum backlash amount P can be reduced. Therefore, the mode switching clutch SOWC of the present embodiment can reduce the maximum backlash P in the mode switching clutch SOWC without increasing the size of the second rotating body 84, for example, and the shock generated in the engagement of the mode switching clutch SOWC. And rattling noise can be suppressed.

Next, another embodiment of the present invention will be described. The same reference numerals are given to the parts common to the above-described first embodiment, and the description thereof will be omitted.

FIG. 9 is an enlarged schematic view showing a part of a main part of the vehicle switching type one-way clutch device SOWC2 (hereinafter referred to as mode switching clutch SOWC2) to which the present embodiment is applied, and is a schematic view showing the engaging plate material 200a. The area around is shown enlarged. The engaging plate member 200a is made of a plate-shaped member having a predetermined thickness, and is formed so as to extend longitudinally along a rotation direction, that is, a circumferential direction. One end of the engaging plate material 200a in the longitudinal direction, that is, the tip portion 202a of the engaging plate material 200a is attached to the second rotating body 210 side by the elastic body 88a containing the first recess 94a formed in the first rotating body 82. It is being pushed. The other end of the engaging plate material 200a in the longitudinal direction, that is, the base end portion 204a of the engaging plate material 200a is brought into contact with the first stepped portion 110a formed in the first recess 94a. That is, the engaging plate material 200a is rotatable about the base end portion 204a that engages with the first stepped portion 110a.

As shown in FIG. 9, in the tip portion 202a of the engaging plate material 200a, the engaging plate material side engaging surface 214a that engages with the second recess 212a formed in the second rotating body 210 has an axis C direction and a circumference. A first step portion 216 and a second step portion 218 that change in the direction are provided. Specifically, the engaging plate material side engaging surface 214a is connected to the first step portion 216 formed of the first axial wall surface 216a extending in the axial direction C direction of the tip portion 202a and the first axial wall surface 216a, that is, in the circumferential direction. Includes a second step portion 218 composed of a second circumferential wall surface 218b extending in the rotational direction and a second axial wall surface 218a extending in a direction away from the second circumferential wall surface 218b in the direction away from the second circumferential wall surface 218b. It is configured. The second step portion 218 is formed at a position away from the first rotating body 82 in the axis C direction with respect to the first step portion 216.

In the lock mode state of the mode switching clutch SOWC2, the tip portion 202a of the engaging plate member 200a is moved to the second concave portion 212a side of the second rotating body 84 by the urging force of the elastic body 88a, and is formed in the second concave portion 212a. It becomes possible to come into contact with the axial wall surface 220a. As a result, for example, the tip portion 202a of the engaging plate member 200a is engaged with the axial wall surface 220a. At this time, in the engaging plate member 200a, the first axial wall surface 216a or the second axial wall surface 218a can be engaged with the axial wall surface 220a in the circumferential direction. That is, the engaging positions of the tip portion 202a of the engaging plate material 200a and the second recess 212a are provided at a plurality of locations. The first axial wall surface 216a is, for example, a first engaging position that engages the axial wall surface 220a of the second recess 212a in the circumferential direction, and the second axial wall surface 218a is, for example, a second in the circumferential direction. This is the second engaging position that engages with the axial wall surface 220a of the recess 212a.

As described above, according to the mode switching clutch SOWC2 of the present embodiment, the engaging plate material side engaging surface 214a that engages with the second recess 212a of the tip portion 202a of the engaging plate material 200a has the axis C direction and the circumferential direction. The first stepped portion 216 and the second stepped portion 218 are provided, and the engaging positions of the tip portion 202a and the second recessed portion 212a of the engaging plate material 200a are provided at a plurality of locations. As a result, as compared with the case where the engaging positions of the tip portion 202a of the engaging plate material 200a and the second recess 212a are not provided at a plurality of locations, the adjacent engaging plate materials 200a of the plurality of engaging plate materials 200a are adjacent to each other. In, the distance between the engaging positions of the tip portion 202a of the engaging plate material 200a and the second recess 212a, that is, the maximum backlash amount P can be reduced. Therefore, the mode switching clutch SOWC2 of the present embodiment can reduce the maximum backlash P in the mode switching clutch SOWC2 without increasing the size of the second rotating body 84, for example, and a shock generated when the mode switching clutch SOWC2 is engaged. And rattling noise can be suppressed.

Further, when the vehicle speed is high, that is, when the rising acceleration of the engaging plate member 200a is small, the second recess 212a is engaged in the second engagement even when the wall surface 218a in the second axial direction, that is, the second engaging position cannot be engaged. It becomes possible to engage at the first axial wall surface 216a formed on the side of the first rotating body 82 with respect to the position, that is, the first engaging position. On the other hand, when the vehicle speed is low, that is, when the rising acceleration of the engaging plate member 200a is large, the second recess 212a is a second shaft formed at a position separated from the first rotating body 82 in the axis C direction from the first engaging position. It can be engaged at the directional wall surface 218a, that is, the second engaging position. That is, for example, when the rising acceleration of the engaging plate material 200a is small, the engaging performance between the tip portion 202a of the engaging plate material 200a and the second recess 212a can be maintained.

Although a preferred embodiment of the present invention has been described in detail with reference to the drawings, the present invention is not limited to this, and is also carried out in still another embodiment.

For example, in the above-described embodiment, the rotating body-side engaging surface 116a that engages with the tip portion 120a of the engaging plate member 86a of the second recess 98a has the first axial wall surface 130a and the first engaging position. The second axial wall surface 132a, which is the two engaging positions, is formed, but the present invention is not limited to this, and two or more engaging positions may be formed. Further, two or more engaging positions may be formed on the engaging plate material side engaging surface 214a that engages with the second recess 212a of the tip portion 202a of the engaging plate material 200a.

Although the embodiments of the present invention have been described in detail with reference to the drawings, the above is only one embodiment, and other examples are not given, but the present invention will be described by those skilled in the art without departing from the spirit of the present invention. It can be implemented with various changes and improvements based on knowledge.

80: Actuator 82: First rotating body 84, 210: Second rotating body 86a, 200a: Engaging plate material 88a: Elastic body 92: First surface 94a: First recess 96: Second surface 98a, 212a: Second recess 104: Circular member 116a: Engagement surface on the rotating body side (engagement surface)
120a, 202a: Tip portion 122a: Base end portion 130, 216: First step portion (step)
132, 218: Second step (step)
214a: Engagement plate material side engagement surface (engagement surface)
SOWC, SOWC2: Mode switching clutch (vehicle switching type one-way clutch device)

Claims (1)

A first rotating body that is rotatably provided around the center of rotation and has a first surface in which a plurality of first recesses are formed along the circumferential direction.
A second rotating body which is provided so as to be rotatable relative to the first rotating body around the rotation center line, has a plurality of second recesses formed therein, and has a second surface facing the first surface.
A plurality of engaging plate materials housed in the plurality of first recesses, and
The tip portions of the engaging plate members are moved toward the second rotating body side in a state where the base end portions of the plurality of engaging plate members are engaged in the first recessed portions, respectively, which are housed in the plurality of first recesses. With multiple elastic bodies to urge
The second rotating body is provided so as to be movable in the direction of the rotation center line in a state of being in contact with the tip portions of the plurality of engaging plate members, and the tip portions of the engaging plate members resist the urging force of the elastic body. An annular position that is positioned at a non-engaging position that is pushed into the first recess and a one-way engaging position that allows the tip of the engaging plate material to protrude from the first recess and engage with the second recess. With parts,
In a state where the annular member is operated to the non-engaging position by the actuator, relative rotation of the first rotating body and the second rotating body is allowed, and the annular member is moved to the one-way engaging position by the actuator. A switching type unidirectional clutch device for a vehicle in which the relative rotation of the first rotating body and the second rotating body in one direction is prevented in the operated state.
At least one of the engaging surface of the second recess that engages with the tip of the engaging plate material and the engaging surface of the tip of the engaging plate that engages with the second recess is the said. A switching type for vehicles, characterized in that a step that changes in the rotation center line direction and the circumferential direction is provided, and the engagement position between the second recess and the tip end portion of the engaging plate material is provided at a plurality of locations. One-way clutch device.

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