JP2008151308A - Parking lock device for vehicle - Google Patents

Abstract

To provide a parking lock device for a vehicle that can lock drive wheels reliably, can reduce vehicle weight, and can be realized at a relatively low cost.
A parking gear 5 fixed to a drive shaft 2 connected to a rotating shaft of an in-wheel motor 1 and an engagement engaged with the parking gear 5 at one end thereof while being swingably supported by a support shaft 7. An engaging piece 6 having a protrusion 8 and an abutting member 10 arranged so as to be movable in the range of the engaging piece 6 in contact with the engaging piece 6 are provided corresponding to each drive wheel. Each contact member is connected, and a single actuator serving as a power source for each contact member is provided between the drive wheels.
[Selection] Figure 2

Description

  The present invention relates to a vehicle parking lock device that is used in a vehicle including an in-wheel motor and locks drive wheels of a stopped vehicle.

  As a vehicle using an electric motor, for example, in addition to an electric vehicle, a so-called hybrid vehicle using an engine and an electric motor in combination can be cited. Among these vehicles, vehicles using electric motors built in left and right front wheels, left and right rear wheels, or all four wheels, so-called in-wheel motors, have been developed.

  Here, for example, in a vehicle such as a gasoline engine vehicle that transmits a driving force from a single driving source (engine) to each driving wheel via a transmission device, means for distributing the driving force to each driving wheel during parking By locking the transmission device on the drive source side, it is possible to lock all the drive wheels at the same time. However, in a vehicle in which each drive wheel is provided with a drive source such as the in-wheel motor, it is necessary to individually lock each drive wheel during parking. As a parking lock device for an electric vehicle employing such a motor, for example, it has a lock gear integrally coupled with a drive shaft of an in-wheel motor, and a lock pin having a meshing protrusion, and this lock pin is rotated by an actuator. Thus, there is a mechanism that locks the rotation of the lock gear, that is, the rotation of the in-wheel motor that is a drive source by inserting the meshing protrusion into the notch (recessed portion) of the lock gear (see, for example, Patent Document 1). .

JP 2005-168076 A

  By providing the parking lock device as described above on each driving wheel, each driving wheel can be reliably locked. However, there is a problem that a plurality of parking lock devices are required and the cost is increased. In particular, the actuator constituting the parking lock device is a major factor in increasing the cost. There is also a problem that the vehicle weight increases by mounting a plurality of parking lock devices on the vehicle.

  The present invention has been made in view of the above circumstances, and it is possible to reliably lock the drive wheels, reduce the vehicle weight, and realize the vehicle parking at a relatively low cost. An object is to provide a locking device.

  A first aspect of the present invention that solves the above problem is a parking lock device for a vehicle having an in-wheel motor provided on each of a pair of left and right drive wheels, the drive being coupled to a rotating shaft of the in-wheel motor. A parking gear fixed to the shaft; an engagement piece supported by a support shaft so as to be swingable; and an engagement piece engaging with the parking gear at one end thereof; and in contact with the engagement piece A single actuator that has a contact member movably arranged in the range of the engagement piece corresponding to each drive wheel, and is connected to each contact member to serve as a power source for each contact member There is a parking lock device for a vehicle characterized by having between the drive wheels.

  According to a second aspect of the present invention, in the parking lock device for a vehicle according to the first aspect, the actuator is a motor cylinder, and each contact member is connected to an output shaft of the motor cylinder. is there.

  According to a third aspect of the present invention, the drive shaft is connected to the rotary shaft via a universal joint and extends to the center between the drive wheels, and the parking gear is provided at the extended end. Is fixed in the vehicle parking lock device according to the first or second aspect.

  According to a fourth aspect of the present invention, there is provided a rod-like connecting member in which each parking gear is provided in proximity to the in-wheel motor of each driving wheel, and each abutting member extends in the axial direction of the rotating shaft. The vehicle parking lock device according to the first or second aspect is characterized in that the vehicle parking lock device is connected to the actuator.

  According to a fifth aspect of the present invention, each parking gear is provided close to the in-wheel motor of each drive wheel, and each contact member is connected to the actuator via a connecting member made of a push-pull wire. The vehicle parking lock device according to the first or second aspect is characterized by the above.

  According to a sixth aspect of the present invention, each parking gear is provided in proximity to the in-wheel motor of each drive wheel, each contact member is connected to the actuator via a connecting member made of a wire, and The vehicle parking lock device according to the first aspect is characterized in that the actuator is an electric motor, and each connecting member is wound around a rotation shaft of the actuator.

  According to a seventh aspect of the present invention, in the sixth aspect, the connecting member is formed of a push-pull wire, and only one end side of each abutting member is connected to the actuator via the connecting member. The vehicle parking lock device according to the aspect.

  According to an eighth aspect of the present invention, in the vehicle according to the sixth aspect, the connecting member is made of a pull wire, and both end portions of each contact member are connected to the actuator via the connecting member. Parking lock device.

  According to a ninth aspect of the present invention, the contact member is moved so that the contact member is always in contact with the engagement piece on the side opposite to the engagement piece of the contact member. The vehicle parking lock device according to any one of the first to eighth aspects is provided with a guide member for restricting the movement.

  In the present invention, since each contact member corresponding to a pair of drive wheels is moved by a single actuator, the structure is simplified, and the number of actuators is reduced, thereby greatly reducing the cost. Can do. Further, since the parking lock device is reduced in weight, the vehicle can be reduced in weight as a result.

  Hereinafter, the present invention will be described based on each embodiment.

(Embodiment 1)
FIG. 1 is a plan view schematically illustrating the parking lock device according to the first embodiment, and FIG. 2 is a view taken along the line AA ′ in FIG. 1.

  The parking lock device according to this embodiment is provided as a lock mechanism for an in-wheel motor provided on a pair of left and right drive wheels of a vehicle. As shown in FIG. 1, the in-wheel motor 1 is provided in the wheels (not shown) of the left and right drive wheels, and the drive shaft 2 connected to the rotation shaft (not shown) of each of the in-wheel motors 1 is provided. Further, each of the drive wheels (each in-wheel motor 1) is extended to a substantially central portion via the universal joint 3. Parking gears 5 (5A, 5B) each having a plurality of locking teeth 4 on the outer peripheral portion are fixed to the extended ends of the drive shafts 2, respectively. The parking gears 5 are arranged at intervals that do not contact each other. These parking gears 5 rotate integrally with the drive shaft 2 by transmitting the rotation of each in-wheel motor 1 to each drive shaft 2.

  On each parking gear 5, an engagement piece 6 (6A, 6B) is swingably supported by a support shaft 7. The engaging pieces 6 are provided with engaging protrusions 8 that protrude toward the parking gear 5 and engage with the locking teeth 4 of the parking gear 5. Further, a spring member 9 made of, for example, a coil spring is fixed to the engagement piece 6, and the engagement piece 6 engages the engagement protrusion 8 and the locking tooth 4 by the spring member 9. It is in a state of being always pulled in the release direction (downward direction in FIG. 2). The spring member 9 is not necessarily provided.

  On each engagement piece 6A, 6B, an abutting member 10 (10A, 10B) that is movable in a direction perpendicular to the axial direction of the support shaft 7 while being in contact with the surface of each engagement piece 6 is provided. Each is arranged. Roller members 11A and 11B are rotatably provided on the upper and lower surface portions of the contact member 10 according to the present embodiment so that the roller member 11A on the engagement piece 6 side is in contact with the engagement piece 6. It is configured.

  Further, on the opposite side of the contact member 10 from the engagement piece 6, the movement of the contact member 10 is restricted so that the roller member 11 </ b> A of the contact member 10 is always in contact with the engagement piece 6. A guide member 12 is provided. That is, the contact member 10 is movable in a state where the roller member 11A on the engagement piece 6 side contacts the surface of the engagement piece 6 and the roller member 11B on the guide member 12 side contacts the guide member 12. The guide member 12 is moved along the shape of the roller member 11B side of the guide member 12. For example, in the present embodiment, the side surface of the roller member 11B of the guide member 12 is inclined toward the engagement piece 6 side in a region corresponding to the vicinity of the end portion of the engagement piece 6 opposite to the engagement protrusion 8. An inclined portion 12 a made up of a surface is provided, whereby the contact member 10 is moved substantially along the rotation locus of the engagement piece 6.

  In the present invention, each of the contact members 10A and 10B is connected to a single actuator 13 disposed between the left and right drive wheels, and each of the contact members 10A and 10B drives the single actuator 13 as a power source. It is configured to be moved as a source. Here, as the actuator 13, any actuator can be used as long as each contact member 10 can be pushed forward. However, in the present embodiment, the motor cylinder (the motor output shaft is not rotated but axially moved). (Motor in and out) is used.

  In such a parking lock device of this embodiment, when the vehicle travels, as shown in FIG. 3A, the contact member 10 is positioned, for example, closer to the actuator 13 than the support shaft 7 of the engagement piece 6. The spring member 9 pulls the vicinity of the end of the engagement piece 6 opposite to the engagement protrusion 8 downward in the figure, and the contact member 10 substantially contacts the engagement piece 6 with the roller member 11A. The state in which the engagement between the engagement protrusion 8 and the locking tooth 4 is released is maintained. Specifically, since the guide member 12 is provided with the inclined portion 12a, the contact member 10 is moved substantially along the rotation trajectory of the engagement piece 6, so that the contact member 10 is always provided. Is maintained in contact with the engaging piece 6 via the roller member 11A. Therefore, the state in which the engagement between the engagement protrusion 8 and the locking tooth 4 is released is reliably maintained. In addition, the inclined part 12a of the guide member 12 should just be determined suitably based on the rotation locus | trajectory of the engagement piece 6, The surface (roller member 11B side surface) is not limited to a flat surface, For example, a curved surface Or the like.

  On the other hand, when the rotation of each drive wheel (in-wheel motor 1) is locked when each vehicle is stopped, each contact member 10A, 10B is pushed forward by the actuator 13, that is, each contact member 10 is engaged. By moving the joint piece 6 toward the engagement protrusion 8 side, the engagement piece 6 is pressed by the contact member 10 and engaged against the spring force of the spring member 9 as shown in FIG. The piece 6 rotates clockwise in FIG. Thereby, the engagement protrusion 8 is engaged with the locking tooth 4 of the parking gear 5, and the rotation of each drive wheel (in-wheel motor 1) is locked (see FIG. 2).

  Thus, in this embodiment, since each contact member 10A, 10B corresponding to each left and right drive wheel is moved by a single actuator 13, the structure is more than that of a parking lock device provided with an actuator for each drive wheel. Simplification can greatly reduce the cost. In particular, reducing the number of relatively expensive actuators leads to a significant cost reduction. Further, by reducing the number of actuators, the weight of the parking lock device can be reduced, and as a result, the weight of the vehicle on which the parking lock device is mounted can be reduced.

  Here, as shown in FIG. 4, in the conventional parking lock device, the contact member 110 side of the guide member 112 is formed flat, and the contact member 110 is moved along the guide member 112. Therefore, the state where the engagement protrusion 108 and the engagement tooth 104 are disengaged is held only by the pulling force of the spring member 109. That is, a gap including a roller member is formed between the engagement piece 106 and the contact member 110. For this reason, the engagement piece 106 slightly rotates against the spring force of the spring member 109 as shown by a two-dot chain line in the figure due to vibration during traveling of the vehicle, and the engagement protrusion 108 is engaged with the locking tooth of the parking gear 105. There was a risk of contact with 104 and breakage.

  However, in the parking lock device of the present invention, as described above, even when the engagement of the engaging protrusion 8 and the locking tooth 4 is released by the guide member 12, the contact member 10 is interposed via the roller member 11A. Since it is in contact with the engagement piece 6, the engagement piece 6 does not rotate at least toward the parking gear 5 even if the vehicle is running or the like, and the damage of the engagement protrusion 8 and the like is reliably prevented. can do. The roller members 11A and 11B are not necessarily required as long as there is no hindrance to the operation and wear of each member.

(Embodiment 2)
FIG. 5 is a plan view schematically illustrating the parking lock device according to the second embodiment. In addition, the same code | symbol is attached | subjected to the same member and the overlapping description is abbreviate | omitted.

  This embodiment is an example in which each contact member is connected to an actuator via a connecting member. As shown in FIG. 5, each parking gear 5 is provided close to the inside of the in-wheel motor 1, and accordingly, the engagement piece 6 is also provided close to the in-wheel motor 1. In the present embodiment, each of the contact members 10 </ b> A and 10 </ b> B is connected by a rod-like connecting member 20 extending along the axial direction of the drive shaft 2, and the actuator 13 is connected to the connecting member 20. It is connected.

  Needless to say, even with such a configuration, as in the first embodiment, it is possible to reduce the cost. Moreover, further reduction in weight of the parking lock device is expected by shortening the length of the drive shaft 2.

  In the present embodiment, each contact member 10A, 10B is connected to the actuator 13 by the connecting member 20. However, the present invention is not limited to this, and of course, each contact member 10A, 10B is connected to the actuator 13. The connecting member may be independent for each contact member.

  Further, in the configuration in which the contact members 10A and 10B are connected to the actuator 13 by the connecting member 20 as described above, as shown in FIG. 6, a beam portion 21 that connects the left and right in-wheel motors 1 may be provided. preferable. Thereby, the breakage of the engagement piece 6, particularly the breakage of the engagement protrusion 8 can be prevented.

(Embodiment 3)
FIG. 7 is a plan view schematically showing the parking lock device according to the third embodiment, and FIG. 8 is a view taken along the line BB ′ of FIG. In addition, the same code | symbol is attached | subjected to the same member and the overlapping description is abbreviate | omitted.

  This embodiment is an example in which each contact member is connected to an actuator composed of a motor cylinder (a motor in which the motor output shaft moves in and out in the axial direction instead of rotation) by a connecting member composed of a push-pull wire. As shown in FIGS. 7 and 8, in this embodiment, the connecting member 20 </ b> A is a push-pull wire (a pushable / pullable wire, specifically, a movable wire is arranged inside a cylindrical fixing measure). The contact members 10A and 10B and the output shaft of the actuator 13 are connected to each other by a single connecting member 20A, that is, a single push-pull wire. In the present embodiment, a plurality of wire guides 22 are arranged between the contact members 10 </ b> A and 10 </ b> B and the actuator 13, and the connecting member 20 </ b> A is respectively connected to the output shaft of the actuator 13 via the plurality of wire guides 22. It is connected.

  The wire guide 22 may be increased / decreased or extended as necessary, and the wire guide 22 is not necessarily required as long as the operation and wear of each member are not hindered.

(Embodiment 4)
FIG. 9 is a plan view schematically showing the parking lock device according to the fourth embodiment and a view taken along the line CC ′. This embodiment is an example in which the actuator 13A made of an electric motor is employed in the configuration of the third embodiment, and each contact member is connected to the actuator 13A by a connecting member made of a push-pull wire.

  As shown in FIG. 9, one end of a connecting member 20B composed of a push-pull wire is connected to each of the contact members 10A and 10B, and the other end of the connecting member 20B is the rotating shaft 24 of the actuator 13A that is an electric motor. It is wound around the drive drum 25. When the driving drum 25 of the rotating shaft 24 rotates in one direction (for example, clockwise direction indicated by an arrow in the figure), the connecting members 20B connected to the contact members 10A and 10B are respectively shown as indicated by arrows in the figure. Pulled to unlock. Conversely, when the drive drum 25 of the rotating shaft 24 rotates in the other direction (for example, counterclockwise direction), the connecting members 20B connected to the contact members 10A and 10B are pushed out and locked.

  A plurality of wire guides 22 are arranged between the contact members 10A and 10B and the actuator 13A, and each connecting member 20B is wound around the outer periphery of the drive drum 25 of the rotary shaft 24 via the wire guides 22. It is hung.

  In such a configuration, by rotating the electric motor as the actuator 13A in one direction, both the connecting members 20B connected to the contact members 10A and 10B are wound around the drive drum 25 of the rotating shaft 24. It will be. Further, by rotating the electric motor that is the actuator 13 </ b> A in the other direction, both the connecting members 20 </ b> B connected to the contact members 10 </ b> A and 10 </ b> B are drawn out from the drive drum 25 of the rotating shaft 24. That is, the contact members 10A and 10B can be simultaneously pulled or pushed out by rotating the electric motor as the actuator 13A forward and backward.

  If there is a problem that the connecting member 20B (push-pull wire) is lifted from the drive drum 25 of the rotating shaft 24 at the time of pushing, a wire guide (not shown) dedicated to the lift may be provided on the drive drum 25.

(Embodiment 5)
FIG. 10 is a plan view schematically illustrating the parking block device according to the fifth embodiment, and FIG. 11 is a view taken along the line DD ′ of FIG.

  In the present embodiment, the contact members 10A and 10B are connected to the actuator 13A using the connecting members 20C and 20D, which are pull wires that perform only pulling, and are moved by the two connecting members 20C and 20D. It is a thing.

  As shown in FIGS. 10 and 11, the contact members 10A and 10B are connected to the drive drum 25 of the rotary shaft 24 of the actuator 13A by connecting members 20C and 20D made of pull wires on both ends in the moving direction, respectively. Yes. That is, one end of each of the connecting members 20C and 20D is connected to one moving end side (for example, the left side in FIG. 11) of each of the contact members 10A and 10B, wound around the drive drum 25 via the pulley 23, and It is connected to the other moving end side (for example, the right side in FIG. 11) of each contact member 10A, 10B via a pulley 23.

  For example, when the driving drum 25 of the rotating shaft 24 rotates in one direction, the connecting members 20C and 20D are wound around the driving drum 25 so that one moving end side of each of the contact members 10A and 10B is pulled, and the lock is released. The Conversely, when the driving drum 25 of the rotating shaft 24 rotates in the other direction, the connecting members 20C and 20D are wound around the driving drum 25 in a state where the other moving end side of each of the contact members 10A and 10B is pulled. Is done.

  In other words, in such a configuration, the contact members 10A and 10B move when the actuator 13A is rotated and pulled by one end of each of the connecting members 20C and 20D. For example, when the engagement between the engagement protrusion 8 and the locking tooth 4 is released, the contact members 10A and 10B move in the direction in which the engagement between the engagement protrusion 8 and the locking tooth 4 is released. Thus, the actuator 13A is rotated in the direction in which the connecting members 20C and 20D are wound around the drive drum 25 of the rotating shaft 24. At this time, since the end of the connecting member 20C, 20D opposite to the end where the connecting member 20C, 20D is wound is sent out from the drive drum 25 of the rotating shaft 24, the contact members 10A, 10B move well. Is done.

  10 and 11, the arrangement position and the arrangement angle of the pulley 23 are shown in a state different from the actual state for convenience of explanation. If there is slack in the wire, it can be handled by a mechanism that adjusts the position of the pulley 23. If there is no problem in the operation or wear of each member, the pulley 23 is a wire guide (the wire guide 22 shown in FIGS. 7 and 9). Or the number of pulleys 23 may be increased or decreased as necessary. In the case of a wire guide, the shape may be appropriately extended. Further, these pulleys 23 and wire guides are not necessarily required if there is no problem in the operation and wear of each member. Further, each of the connecting members 20C and 20D is not wound one, but one end of a single wire is connected to each end of each contact member 10A and 10B and the other end is connected to the drive drum 25. Good.

  As described in the third to fifth embodiments, the weight of the connecting member is greatly reduced by connecting each contact member and the actuator by the connecting member made of a wire, thereby further reducing the weight of the parking lock device. be able to.

It is a top view which shows the outline of the parking lock apparatus which concerns on Embodiment 1. FIG. It is an AA 'arrow line view of the parking lock device concerning Embodiment 1. FIG. It is a figure explaining operation | movement of the parking lock apparatus which concerns on Embodiment 1. FIG. It is a figure which shows the outline of the parking lock apparatus based on a prior art. It is a top view which shows the outline of the parking lock apparatus which concerns on Embodiment 2. FIG. It is a top view which shows the modification of the parking lock apparatus which concerns on Embodiment 2. FIG. It is a top view which shows the outline of the parking lock apparatus which concerns on Embodiment 3. FIG. It is a BB 'arrow line view of the parking lock device concerning Embodiment 3. It is the top view which shows the outline of the parking lock apparatus which concerns on Embodiment 4, and its CC 'arrow directional view. It is a top view which shows the outline of the parking lock apparatus which concerns on Embodiment 5. FIG. FIG. 10 is a DD ′ arrow view of a parking lock device according to a fifth embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 In-wheel motor 2 Drive shaft 3 Universal joint 4 Locking tooth 5 Parking gear 6 Engagement piece 7 Support shaft 8 Engagement protrusion 9 Spring member 10 Contact member 11 Roller member 12 Guide member 12a Inclination part 13 Actuator 20 Connection member 21 Beam 22 Wire guide 23 Pulley 24 Rotating shaft 25 Drive drum

Claims (9)

A parking lock device for a vehicle having an in-wheel motor provided on each of a pair of left and right drive wheels,
A parking gear fixed to a drive shaft connected to a rotation shaft of the in-wheel motor, an engagement piece supported by a support shaft so as to be swingable and having an engagement protrusion engaging with the parking gear at one end thereof; In addition, each of the driving wheels has an abutting member that is arranged so as to be movable in a state of being in contact with the engaging piece.
A parking lock device for a vehicle, wherein each contact member is connected to each other and has a single actuator that serves as a power source for each contact member.   2. The parking lock device for a vehicle according to claim 1, wherein the actuator is a motor cylinder, and each contact member is connected to an output shaft of the motor cylinder.   The drive shaft is connected to the rotary shaft via a universal joint and extends to a substantially central portion between the drive wheels, and the parking gear is fixed to the extended end portion. The parking lock device for a vehicle according to claim 1 or 2.   Each parking gear is provided close to the in-wheel motor of each drive wheel, and each contact member is connected to the actuator via a rod-like connecting member extending in the axial direction of the rotating shaft. The parking lock device for vehicles according to claim 1 or 2 characterized by things.   Each parking gear is provided in proximity to the in-wheel motor of each drive wheel, and each contact member is connected to the actuator via a connecting member made of a push-pull wire. The parking lock device for a vehicle according to 1 or 2. Each parking gear is provided in proximity to the in-wheel motor of each drive wheel, and each contact member is connected to the actuator via a connecting member made of a wire,
2. The parking lock device for a vehicle according to claim 1, wherein the actuator is an electric motor, and each connecting member is wound around a rotation shaft of the actuator.   The parking lock device for a vehicle according to claim 6, wherein the connecting member is formed of a push-pull wire, and only one end side of each abutting member is connected to the actuator via the connecting member.   The parking lock device for a vehicle according to claim 6, wherein the connecting member is formed of a pull wire, and both end portions of each contact member are connected to the actuator via the connecting member.   On the opposite side of the contact member from the engagement piece, a guide member for restricting the movement of the contact member is provided so that the contact member is always in contact with the engagement piece. The vehicle parking lock device according to any one of claims 1 to 8, wherein the parking lock device for a vehicle is provided.

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