JP2020138660A - Parking lock device - Google Patents

Abstract

To provide a parking lock device that can achieve space-saving while reducing the number of components.SOLUTION: A parking lock device 10 of this invention includes: a rod 20 that can be displaced toward a driven gear 60 based on parking operation for controlling the rotation of a drive wheel 70 being performed; a male section 30 that is provided on the tip of the rod 20; and a plurality of female sections 40 that can be fitted onto the male section 30 and are formed in the driven gear 60. The male section 30 can enter a female section 40 together with displacement of the rod 20 caused by parking operation.SELECTED DRAWING: Figure 2

Description

The present invention relates to a vehicle parking lock device.

The automatic transmission of a vehicle is provided with a parking lock device that locks the drive wheels so that the drive wheels do not rotate when the vehicle is stopped. For example, Patent Document 1 below discloses a parking lock device for an automatic transmission.

Japanese Unexamined Patent Publication No. 2016-70288

The parking lock device consists of a large number of parts such as a parking gear connected to a driven gear, a pole with a claw that fits the parking gear, a cam that is displaced in contact with the pole, and a rod that is connected to the cam. It is configured. In the parking lock device, when the driver enters an operation for parking the shift operation device such as a shift lever (hereinafter, may be simply referred to as "parking operation") when the vehicle is stopped, the pole is displaced and the claws are clawed. The part is configured to fit with the parking gear.

Here, in the parking lock device, when the parking operation is performed, the wire connected to the shift operation device is towed. Further, when the wire is pulled, the rod is displaced via a plurality of rotating members and a link mechanism, and the cam formed as a coma-shaped member is pushed. Further, the pole is displaced due to the displacement of the cam, the claws provided on the pole and the parking gear are engaged with each other, and the drive wheels are locked.

The movement of a general parking lock device will be described with reference to a reference diagram. As shown in FIG. 7 (a-1) shown as a reference diagram, in the conventional parking lock device 100, the cam 130 has a coma-like appearance such that the contact surface 130a with the pole 120 is inclined with respect to the displacement direction. The pole 120 is shaped so that the contact surface 120a with the cam 130 is inclined with respect to the displacement direction. Therefore, for example, when the cam 130 moves in the horizontal direction (horizontal direction in FIG. 7), the pole 120 is displaced in the vertical direction (upward in FIG. 7) as shown in FIG. 7 (b-1). Further, as shown in FIGS. 7 (b-2) and 7 (b-2), the claw portion 122 provided on the pole 120 meshes with the parking gear 110 to prevent the parking gear 110 from rotating.

As described above, in the conventional parking lock device, the displacement direction of the pole is configured to form an angle (about 90 degrees) with respect to the displacement direction of the cam. Therefore, in the conventional parking lock device, the number of parts is large, and a plurality of rod-shaped members such as poles and rods are arranged and displaced so as to intersect with each other. Therefore, a space for allowing displacement of these configurations is required. Therefore, there was a problem that the entire configuration had to be large. Further, in the conventional parking lock device, accuracy is required for the angle and separation distance of the contact surfaces of poles, cams, rods, etc., so that high-precision parts processing is required, and as a result, the cost increases. there were.

Therefore, an object of the present invention is to provide a parking lock device capable of saving space while reducing the number of parts.

Here, as a result of diligent studies by the inventor of the present invention, a drive gear, a driven gear (driven gear) that rotates by inputting rotational power from an input side gear, a parking lock gear that rotates integrally with the drive gear, and the like are driven. It was considered to provide a fitting member capable of linearly entering any gear in which power transmission is not interrupted to the wheels (always connected to the drive wheels). Specifically, instead of a pole having a locking claw that can be engaged with the parking lock gear, the male member is directly fitted by forming a female part on one of the gears that is always connected to the drive wheel. Therefore, we came to the finding that we can provide a parking lock device that does not require a pole.

The parking lock device of the present invention provided based on the above findings is a parking lock device provided in a drive device including a gear that rotates by power from a drive source, and is a parking operation for limiting the rotation of the drive wheels. The displacement body displaceable toward the gear, the male portion provided at the tip of the displaced body, and the male portion can be fitted into the gear based on the above. It has a plurality of female portions, and the male portion is made accessible to the female portion as the displacement body is displaced by the parking operation.

According to the parking lock device of the present invention, the parking lock device can be configured without providing a pole. As a result, the space for accommodating and displacing the pole can be omitted while reducing the number of parts of the parking lock device. As a result, the parking lock device of the present invention can be made compact in layout.

Further, according to the parking lock device of the present invention, the displacement body can be linearly displaced and the drive wheels can be locked by operating the shift operation device such as the shift lever (parking operation). As a result, the parking lock device of the present invention does not require complicated behavior such as displacement of the cam and the pole in two directions as in the conventional parking lock device, and reduces the number of parts requiring high accuracy. The cost can be reduced.

The parking lock device of the present invention is a driven gear in which the gear rotates by following the input side gear and transmits rotational power to the drive wheels among the driven side gears that rotate by receiving power from the input side gear. It is desirable to have.

According to the above configuration, the drive wheels can be locked without the need to provide a parking lock gear. As a result, the parking lock device of the present invention can further reduce the number of parts.

In the parking lock device of the present invention, when the surface of the front and back surfaces of the gear facing the male portion is used as the proximal end surface, the opening edge of the female portion on the proximal end surface side faces the proximal end surface. It is desirable that an inclined portion is formed so that the diameter increases as the diameter increases.

According to the above configuration, the male part can be smoothly guided to the female part.

According to the present invention, it is possible to provide a parking lock device capable of saving space while reducing the number of parts.

It is a schematic diagram which shows the vehicle provided with the parking lock device which concerns on embodiment of this invention. It is a perspective view which shows the parking lock device which concerns on embodiment of this invention. It is a figure which shows the female part of the parking lock device of FIG. It is a schematic diagram which shows the unlocked state of the parking lock device of FIG. It is a schematic diagram which shows the locked state of the parking lock device of FIG. It is a schematic diagram which shows the state which the male part is guided to the inclined part of the parking lock device of FIG. It is a reference figure which shows the conventional parking lock device.

Hereinafter, the parking lock device 10 according to the embodiment of the present invention will be described. The parking lock device 10 is provided in the drive device 50 of the vehicle V.

As shown in FIG. 1, the drive device 50 includes a drive source 52 such as an engine or a motor, and a transaxle 56 that transmits rotational power from the drive source to the drive wheels 70. The transaxle 56 is provided with an input side gear 54 (gear) that rotates in response to an input from a power source, and a driven gear 60 (gear, driven side gear) in which power is transmitted from the input side gear. ..

The driven gear 60 (gear, driven side gear) rotates by transmitting power from the input side gear. Further, when the rotation of the driven gear 60 is stopped, the rotation of the drive wheel 70 connected to the driven gear 60 is stopped.

As shown in FIG. 3, a plurality of through holes 62 are formed in the driven gear 60. More specifically, a plurality of through holes 62 (female portion 40) are provided around the axis L2 of the driven gear 60 (16 in the example shown in FIG. 3). Further, as shown in FIG. 3, a tooth portion that fits with the input side gear 54 is formed on the outer peripheral surface of the driven gear 60. The through hole 62 constitutes the female portion 40 of the parking lock device 10. The details of the female portion 40 will be described in detail later.

In the present embodiment, an example in which a plurality of through holes 62 (female portion 40) are provided in the driven gear 60 (gear, driven side gear) will be described as an example, but the parking lock device of the present invention is not limited to this. .. Specifically, the parking lock device of the present invention applies to any gear such as a drive gear, a drive gear (drive side gear), and a driven gear (driven gear) among gears that rotate by power from a drive source. A female portion (through hole) may be provided.

For example, when the parking lock device of the present invention is provided in a speed reducer that does not have a clutch mechanism or a transmission mechanism, the gear that is always connected to the drive wheels is not limited to the driven gear. Therefore, the parking lock device of the present invention has a female portion (penetration) in any gear as long as it is a gear in which power transmission is not interrupted to the drive wheels by a clutch mechanism or the like (a gear that is always connected to the drive wheels). It may be provided with a hole).

As shown in FIG. 1, the vehicle V is provided with a shift operation device 1. The shift operation device 1 is provided with a plurality of range positions R. Specifically, the shift operation device 1 is provided with a plurality of range positions R such as a D range Rd and an N range, including at least the P range Rp. A wire 2 is connected to the shift operation device 1. The shift operation device 1 is connected to the parking lock device 10 via a cable, a link mechanism (not shown), and a wire 2.

The parking lock device 10 locks the drive wheels 70 of the vehicle V based on the operation of the shift lever 1a of the shift operation device 1. More specifically, the parking lock device 10 limits the rotation of the driven gear 60 to drive the drive wheels 70 based on the operation (parking operation) in which the range position R of the shift operation device 1 is set to the P range. Lock.

As shown in FIG. 2, the parking lock device 10 includes a link mechanism 12, a rod 20 (displacement body), an urging member 22, a male portion 30, and a plurality of female portions 40 (through holes 62).

In the following description, the direction in which the axis L2 of the driven gear 60 extends may be described as "axis direction X". Further, among the surfaces forming the front and back surfaces of the driven gear 60 (surfaces on both sides in the axial direction X), the surface facing the male portion 30 is described as "base end surface 60a", and the other surface is described as "other end surface 60b". May be explained.

The female portion 40 (through hole 62) is formed in the driven gear 60 as described above (see FIG. 3). The female portion 40 is provided to be fitted with the male portion 30 described later to limit the rotation of the driven gear 60. The female portion 40 is provided so as to penetrate the driven gear 60 in the axial direction X, and a plurality of female portions 40 are formed around the axial line L2 of the driven gear 60 (see FIG. 3).

In the parking lock device 10 of the present embodiment, an example in which the female portion 40 is a through hole 62 formed in the driven gear 60 is shown, but the parking lock device 10 of the present invention is not limited to this. For example, in the parking lock device of the present invention, a female portion may be provided as a recess formed on one surface of the front and back surfaces of the driven gear.

As shown in FIG. 4, the opening edge of the female portion 40 is formed in a tapered shape. More specifically, the female portion 40 is formed in a tapered shape so that the opening edge on the proximal end surface 60a side expands in the radial direction toward the proximal end surface 60a, and forms a surface inclined with respect to the proximal end surface 60a. It is said to be an inclined portion 42.

As shown in FIG. 2, the link mechanism 12 is provided to displace the rod 20. The link mechanism 12 is provided with a rocking body 16 and a shaft 14.

As shown in FIG. 2, the shaft 14 is connected to the shift operation device 1 and the wire 2 via a plurality of connecting members (not shown). The rocking body 16 is connected to the shaft 14 and rotates integrally with the rotation of the shaft 14. Further, a rod 20 is connected to the rocking body 16.

As shown in FIG. 2, when the shift lever 1a of the shift operation device 1 is set to a range position R (for example, D range Rd) other than the P range Rp, the rod is positioned so that the male portion 30 is separated from the driven gear 60. 20 is maintained.

When the shift lever 1a of the shift operation device 1 is set to the P range Rp, the wire 2 is pulled (see the arrow F1 in FIG. 2), and the shaft 14 is oriented in the positive direction about the axis L1 (in FIG. 2). (Counterclockwise) Rotate. Further, when the shaft 14 rotates, the rocking body 16 rotates in the positive direction integrally with the shaft 14 (see arrow F2 in FIG. 2). Further, when the rocking body 16 rotates in the positive direction, the rod 20 is pushed and displaced toward the driven gear 60.

Further, when the shift lever 1a of the shift operation device 1 is operated to be in the range position R (for example, D range Rd) other than the P range Rp, the shaft 14 and the rocking body 16 are moved in opposite directions (clockwise in FIG. 2). The rod 20 is displaced so as to be separated from the driven gear 60.

In this way, the link mechanism 12 displaces the rod 20 in the direction closer to the driven gear 60 based on the parking operation to the shift operation device 1. Further, the link mechanism 12 displaces the rod 20 in a direction away from the driven gear 60 based on the shift operation device 1 being set to a range position R other than the P range Rp.

In the following description, among the displacement directions of the rod 20, the direction toward the driven gear 60 will be described as "proximity direction A1", and the direction away from the driven gear 60 will be described as "separation direction A2". In some cases.

As shown in FIG. 2, one end of the rod 20 (displacement body) is connected to the rocking body 16 and the other end is arranged so as to face the driven gear 60. A male portion 30 is provided at the tip of the rod 20. Further, an urging member 22 is attached to the rod 20.

The rod 20 has a position where the male part 30 can enter the female part 40 (hereinafter, may be simply referred to as “accessible position P1”) and a driven gear 60 where the male part 30 exits from the female part 40. It is possible to displace to a position separated from the above (hereinafter, may be simply referred to as "separation position P2"). In other words, the rod 20 can move back and forth between the approachable position P1 and the separated position P2 based on the operation of the shift operation device 1.

The male portion 30 is provided to enter the female portion 40 (through hole 62) and limit the rotation of the driven gear 60. The male portion 30 is displaced so as to move back and forth between the proximity direction A1 and the separation direction A2 as the rod 20 is displaced. Further, the male portion 30 is attached to the rod 20 in a state of being urged by the urging member 22 in the proximity direction A1.

As shown in FIG. 4, the peripheral portion of the male portion 30 is formed with a tapered portion 32 whose diameter is reduced toward the tip. Further, the tip of the male portion 30 is formed with a curved surface portion 34 that forms a gentle curved surface.

<About the operation of the parking lock device>
Subsequently, the operation of the parking lock device 10 will be described with reference to the drawings.

As described above, the parking lock device 10 causes the male portion 30 to enter and exit the female portion 40 formed in the driven gear 60 based on the shift operation such as the parking operation to the shift operation device 1 of the driver. It is possible to switch between a state in which the rotation of the drive wheels 70 is restricted (locked state) and a state in which the rotation of the drive wheels 70 is allowed and the vehicle V can travel (released state).

As shown in FIG. 4, when the shift operation device 1 is in a range position R (for example, D range Rd) other than the P range Rp, the male portion 30 is maintained at the separation position P2. Therefore, the driven gear 60 is allowed to rotate without being restricted by the male portion 30, and the vehicle V can travel.

As shown in FIG. 5, when the shift operation device 1 is operated to set the P range Rp, the rod 20 is displaced toward the driven gear 60 to the approachable position P1.

When the P range Rp is set while the vehicle V is stopped, if the male part 30 is not fitted into the female part 40 (when there is a phase shift), the male part is in the female part 40. The driven gear 60 rotates slightly to the position where 30 is fitted.

More specifically, as shown in FIGS. 6 (a) and 6 (b), when the rod 20 is displaced to a position where the male portion 30 comes into contact with the driven gear 60 and comes into contact with the inclined portion 42 of the female portion 40. The driven gear 60 rotates slightly while the male portion 30 is urged by the urging member 22 so as to be pressed against the driven gear 60. Further, the male portion 30 enters the other end surface 60b side of the female portion 40 so as to be guided by the inclined portion 42 while bringing the curved surface portion 34 into contact with the inclined portion 42 by the urging force of the urging member 22.

When the male portion 30 enters the other end surface 60b side of the female portion 40 by the urging force of the urging member 22 while the driven gear 60 rotates a little, the male portion 30 is fitted into the female portion 40 (see FIG. 5). ). In the state where the male portion 30 is fitted into the female portion 40, the rotation of the driven gear 60 is restricted and the driven gear 60 is locked.

As described above, in the parking lock device 10, the male portion 30 is smoothly provided with the female portion 40 by providing the inclined portion 42 at the opening edge of the female portion 40 and providing the curved surface portion 34 and the tapered portion 32 at the tip of the male portion 30. Can be guided to and fitted.

Further, contrary to the above operation, when the shift operation device 1 is operated from the P range Rp to another range position R (D range Rd, etc.), the rod 20 is displaced in the separation direction A2, and the male portion 30 exits the female part 40. As a result, the parking lock device 10 releases the locked state of the driven gear 60 from the state in which the rotation of the driven gear 60 is restricted (locked state), and enters the unlocked state.

The parking lock device 10 restricts the entry of the male portion 30 into the female portion 40 when the shift operation device 1 is set to the P range Rp when the driven gear 60 is rotating at a predetermined speed or higher. To do

More specifically, when the driven gear 60 is rotating at a predetermined speed or higher and the shift operation device 1 is set to the P range Rp, the urging force of the urging member 22 is caused by the rotational force of the driven gear 60. On the contrary, the male portion 30 retreats so as to be repelled in the separation direction A2. In this way, the parking lock device 10 regulates the entry of the male portion 30 into the female portion 40 when the driven gear 60 is rotating at a predetermined speed or higher. As a result, the parking lock device 10 can prevent the vehicle from being suddenly locked when the shift lever 1a is set to the P range Rp while the vehicle is traveling.

As described above, the parking lock device 10 makes it possible to lock and unlock the drive wheels by advancing and retracting the male portion 30 into the through hole 62 (female portion 40) of the driven gear 60. That is, the parking lock device 10 does not need to separately provide a parking lock gear, a pole having a claw portion that can engage with the parking lock gear, or the like. Therefore, the parking lock device 10 can reduce the number of parts as compared with the conventional parking lock device.

Further, as described above, the parking lock device 10 does not require the pole provided in the conventional parking lock device, and the male portion 30 is moved to the female portion by the operation of displacing the rod 20 in the axial direction X of the driven gear 60. It is possible to switch between the locked state and the unlocked state by advancing and retreating to 40. In other words, the parking lock device 10 does not require a structure for locking the parking lock gear by using a plurality of rod-shaped members (for example, a rod and a pole) as in the conventional parking lock device.

Therefore, the parking lock device 10 does not require complicated behavior such as displacement of the cam and the pole in two directions as in the conventional parking lock device, and reduces the number of parts requiring high accuracy to reduce the cost. Can be made to. Further, the parking lock device 10 does not require a space for accommodating and displacing the pole as compared with the conventional parking lock device, and the layout can be made compact.

Although the parking lock device 10 according to the embodiment of the present invention has been described above, the present invention is not limited thereto. For example, in the above-described embodiment, the driven gear 60 is provided with the female portion 40, but the parking lock device of the present invention may be provided with a through hole in another driven gear. ..

Further, in the parking lock device of the present invention, the number of female portions provided on the driven side gear can be flexibly set according to the size of the driven side gear and the position where the female portion is provided.

Further, the parking lock device of the present invention may be provided in an engine vehicle as well as an electric vehicle or a hybrid vehicle that can travel by using a motor as a drive source. Further, the parking operation device for performing the parking operation of the parking lock device of the present invention can be selected from a shift lever and an operation such as pressing a button.

The parking lock device of the present invention can be suitably used as a device for parking a vehicle.

10 Parking lock device 20 Rod 30 Male part 32 Tapered part 34 Curved surface part 40 Female part 42 Inclined part 50 Drive device 60 Driven gear (gear, driven side gear)
60a Base end surface 60b End end surface 62 Through hole 70 Drive wheel A1 Proximity direction A2 Separation direction V Vehicle

Claims (1)

A parking lock device provided in a drive device having a gear that is rotated by power from a drive source.
A displacement body that is displaceable toward the gear based on a parking operation to limit the rotation of the drive wheels.
The male part provided at the tip of the displacement body and
The male part can be fitted and has a plurality of female parts formed on the gear.
A parking lock device characterized in that the male portion is made accessible to the female portion as the displacement body is displaced by the parking operation.

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