JP2023035536A - parking lock device - Google Patents

Abstract

To provide a parking lock device which enables reduction of vibrations in the parking lock timing and can stabilize the timing of the parking lock.SOLUTION: A parking lock device 20 of the invention includes a parking gear 30, a parking pole 32, a parking rod 34, a cam 36, and a housing part 50 which houses a part of the parking rod 34. The housing part 50 is provided with contact parts 60 each of which functions as a pad surface of the parking pole 32 and restricts movement of the parking pole 32 in a direction along a rotary shaft 33.SELECTED DRAWING: Figure 4

Description

The present invention relates to a parking lock device.

Conventionally, a parking lock device including a parking gear, a parking pole, a cam, a parking rod, etc. has been provided. For example, Patent Literature 1 below discloses a parking lock structure in which a tapered wedge formed on a parking rod is brought into contact with the parking pole to push up the parking pole and engage the parking gear with the parking pole.

JP 2019-60419 A

Here, the conventional parking lock device has a problem that the timing for locking the parking gear (parking lock timing) is not stable. In addition, due to variations in the parking lock timing, when the vehicle is in motion and the P range is entered due to an erroneous operation, the vehicle may be locked at a high speed (e.g. 5 km/h) or at a low speed (e.g. 2 km/h). The speed at which the vehicle locks or is locked varied.

In addition, there is a concern that locking at a high speed will affect the durability of the parts that receive the load during locking. I had a request.

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a parking lock device capable of reducing variations in parking lock timing and stabilizing the parking lock timing.

Here, the inventors of the present invention have investigated the cause of occurrence of variations in parking lock timing. As a result, it was found that the parking lock timing varied due to looseness of the parking pole.

Specifically, in the parking lock device 120, when the vehicle is parked and the shift is put into the P range, the meshing portion 132a of the parking pole 132 is at a position where it contacts the outer circumference (outer diameter) of the parking gear 130. 10), the parking pole 132 contacts the cam 136 so as to straddle the bent portion 136c of the cam 136 (P lock standby state) (see FIG. 11A).

In addition, when the driving wheels move several centimeters in the P lock standby state, the parking gear 130 rotates in conjunction with it, and the cam 136 lifts the parking pole 132 by the force of the spring 137 attached to the parking rod 134 (Fig. 11(b)). reference). As a result, the parking pole 132 and the parking gear 130 are engaged with each other, resulting in a P-locked state (see FIG. 10).

That is, in the P lock standby state, the parking pole 132 contacts the cam 136 so as to straddle the bent portion 136c that is the boundary between the first tapered portion 136a and the second tapered portion 136b (see FIG. 11(a)). The second tapered portion 136b of 136 is structured to lock when the parking pole 132 is received (see FIG. 11(b)).

Here, as shown in FIG. 11B, in the conventional parking lock device 120, a gap S is provided between the mounting portion (receiving portion 150) of the parking support 138 formed in the case body 112 and the parking pole 132. Therefore, a contact surface for restricting the movement of the parking pole 132 is not provided in the vicinity of the contact portion between the parking pole 132 and the cam 136 . Therefore, when the parking pole 132 is pushed by the cam 136, the parking pole 132 moves and rattles (see FIG. 11(a)).

As described above, in the conventional parking lock device 120, since the parking pole 132 is loose (because the position of the parking pole 132 is not stable), the timing at which the parking pole 132 rides on the second tapered portion 136b of the cam 136 varies. I was lucky. In addition, the timing at which the parking pole 132 straddles the bent portion 136c (the timing at which the parking pole 132 rides on the second tapered portion 136b) fluctuates according to the rattling amount, and as a result, the timing for P-locking fluctuates.

As a result of further studies by the inventors of the present invention, it has been found that the backlash of the parking pole can be suppressed by providing an abutting surface on the cam receiving portion (accommodating portion) of the parking support mounting portion provided on the case body. I came to the knowledge that I can do it. That is, the present inventors have found that the parking pole can be prevented from rattling by adding a configuration (abutting portion) that serves as a contact surface in the vicinity of the position (accommodating portion) where the cam presses the parking pole.

(1) A parking lock device of the present invention provided on the basis of the above knowledge includes a parking gear, a parking pole that includes a meshing portion that meshes with the parking gear, and is provided to be swingable about a rotation shaft; a parking rod that is relatively movable with respect to a parking pole; a cam that is attached to the parking rod and makes contact with the parking pole to swing the parking pole; , wherein the accommodating portion is provided with a contact portion that functions as a contact surface for the parking pole and limits movement of the parking pole in a direction along the rotation axis. .

According to the parking lock device of the present invention, it is possible to suppress rattling of the parking pole and stabilize the timing of locking the parking gear.

More specifically, by reducing the variation in parking lock timing, when the vehicle is in motion and the shift is made to the P range due to an erroneous operation, etc., the meshing vehicle speed (when the gear and the parking pole are meshed and locked) is reduced. vehicle speed) stabilizes. For example, in a conventional parking lock device, when the vehicle is moving at a speed of 7 km/h and is shifted to the P range due to an erroneous operation, etc., the vehicle is locked at a high speed (for example, 5 km/h) or at a low speed (for example, 2 km/h). /h), the parking lock device of the present invention can stably lock at a predetermined vehicle speed (for example, 3 km/h).

As a result, it becomes easier to target the meshing vehicle speed, and locking at a high vehicle speed can be reduced. As a result, the durability of each part can be improved.

(2) In the parking lock device of the present invention, when a state in which the meshing portion and the parking gear are meshed is defined as a P-lock state, and a state in which the meshing portion and the parking gear are disengaged is defined as a released state, Preferably, the contact portion is formed so that at least a portion of the contact portion can contact the parking pole throughout the P-locked state and the released state.

According to the above configuration, while minimizing the formation of the contact portion, it is possible to keep the contact portion in contact with the parking pole at all times, thereby suppressing rattling of the parking pole. Further, when the posture of the parking pole is changed to the P-locked state, released state, or the like, it is possible to prevent the parking pole from being caught (ridden over) by the contact portion.

Here, the inventors of the present invention have studied a configuration for further reducing variations in parking lock timing. As a result, the inventors have found that by suppressing the inclination of the parking rod in the process of shifting from the P-lock standby state to the P-lock state, it is possible to further reduce variations in the parking lock timing.

More specifically, as shown in FIG. 9(b), in the process of shifting from the P-lock standby state to the P-lock state, the spring 137 of the parking rod 134 is bent, and the parking rod 134 is tilted (the tip side is jumped up). As a result, the position of the bent portion 136c of the cam 136 with respect to the parking pole 132 is shifted toward the backward side of the parking rod 134 (left side in FIG. 9(b)), and the contact surface between the parking pole 132 and the cam 136 (the contact margin K). becomes less.

Here, as shown in FIG. 12, it is conceivable to increase the engagement margin by increasing the contact surface of the parking pole 132 with the cam 136 . However, if the contact surface of the parking pole 132 is increased, it becomes easier to lock at a high vehicle speed. Therefore, it runs counter to the problem of suppressing locking at high vehicle speeds.

On the other hand, if the position of the parking support is configured to be lower than the conventional position, it is possible to suppress the inclination of the parking rod and secure the engagement allowance. Specifically, by positioning the parking support at a position where it comes into contact with the parking rod in the process of shifting from the P-lock standby state to the P-lock state, it is possible to suppress the inclination of the parking rod and secure the engagement allowance.

(3) The parking lock device of the present invention provided based on the above knowledge includes a parking support that guides the movement of the cam, and the meshing portion is positioned so as to contact the outer diameter of the parking gear. When the state of waiting for engagement of the parking gear and the parking gear is defined as a P lock standby state, and the state where the meshing portion and the parking gear are engaged is defined as a P lock state, the parking support shifts from the P lock standby state to the P lock standby state. It is provided at a position that allows contact with the parking rod in the process of shifting to the locked state, and at a position that limits the inclination of the parking rod.

According to the above-described configuration, it is possible to reduce the amount by which the parking rod springs up (the amount of inclination), and to ensure sufficient engagement between the cam and the parking pole. As a result, the parking lock timing can be further stabilized.

(4) The parking lock device of the present invention is provided with a plurality of contact portions that function as a contact surface of the parking pole and limit movement of the parking pole in a direction along the rotation axis. As parts, a first contact part provided in the housing part, a second contact part formed so as to surround the rotating shaft, and a third contact part provided near the meshing part; is provided.

In the above-described configuration, the contact portion (second contact portion) is provided at the position that serves as the swing fulcrum of the parking pole, and the contact portions (first contact portion) are provided at both ends (both sides of the rotation center) that are free ends. and a third contact portion) are provided. Therefore, rattling of the parking pole can be suppressed more efficiently.

(5) In the parking lock device of the present invention, the parking gear and the parking pole are housed in a case body that is a housing body for a transaxle, and the housing portion is formed in the case body, At least part of the accommodation portion may be formed up to a position where it contacts the parking pole, and a part of an end surface of the accommodation portion may be formed as the contact portion.

According to the above configuration, it is possible to suppress rattling of the parking pole with a simple configuration without adding a separate member.

According to the present invention, it is possible to provide a parking lock device capable of reducing variations in parking lock timing and stabilizing the parking lock timing.

1 is a perspective view showing a gear chamber of a transaxle provided with a parking lock device according to an embodiment of the invention; FIG. FIG. 2 is a perspective view showing members constituting the parking lock device of FIG. 1; FIG. 2 is a side view showing the position of a contact portion of the parking lock device of FIG. 1; 4 is a cross-sectional view taken along line L1-L1' of FIG. 3; FIG. FIG. 4 is an enlarged view of a main portion of FIG. 3; 2 shows a released state of the parking lock device of FIG. 1; The P lock state of the parking lock device of FIG. 1 is shown. 2 shows a P lock standby state of the parking lock device of FIG. 1; (a) shows a state in which the parking rod jumps up in the process of shifting from the P-unlocked state to the P-locked state of the parking lock device of FIG. (b) is a reference diagram showing a state in which the parking rod jumps up during the process of shifting from the P-unlocked state to the P-locked state of the conventional parking lock device. It is a reference diagram showing a side surface of a conventional parking lock device. FIG. 10 is a reference diagram showing a P-lock standby state and a P-lock state of a conventional parking lock device; It is a reference drawing which illustrates the case where the contact surface of a parking pole is expanded.

A parking lock device 20 according to an embodiment of the present invention will be described below with reference to the drawings.

As shown in FIG. 1, the parking lock device 20 is provided in a transaxle 10 including an electric motor (not shown), a differential mechanism (not shown), and the like. Inside the case body 12 that constitutes the housing body of the transaxle 10, the parts that constitute the parking lock device 20 (the parking pole 32, the parking rod 34, etc.), the gear that constitutes the differential mechanism, and the like are housed.

As shown in FIGS. 1 and 2, the parking lock device 20 includes a parking gear 30, a parking pole 32, a parking rod 34, a cam 36, and a parking support . Further, as shown in FIG. 3 , the parking lock device 20 has a contact portion 60 provided on the case body 12 . Furthermore, as shown in FIG. 2, the parking lock device 20 includes constituent members such as a rotating shaft 33, a torsion spring 40, an outer lever 41, a control shaft 42, a parking lever 43, and the like.

As shown in FIG. 3 , the case body 12 is formed with a housing portion 50 , a rotating shaft mounting portion 52 and a contact surface portion 54 . As shown in FIG. 3 , the rotating shaft attachment portion 52 is attached with the rotating shaft 33 of the parking pole 32 . The contact surface portion 54 is provided in the vicinity of the meshing portion 32 a of the parking pole 32 .

As shown in FIG. 4 , the accommodating portion 50 is hollow inside and accommodates a portion (front end side) of the parking rod 34 . Further, as shown in FIG. 4 , a parking support 38 is attached to the accommodation portion 50 .

The case body 12 is provided with a plurality of contact portions 60 that function as contact surfaces for the parking poles 32 and restrict movement of the parking poles 32 along the rotation shaft 33 (axial direction X). More specifically, as shown in FIG. 3, at least a part of the end surfaces of the housing portion 50, the rotating shaft mounting portion 52, and the contact surface portion 54 serves as a contact portion 60 that functions as a contact surface for the parking pole 32. ing. A hatched portion shown in FIG. 3 is a portion formed as a processed surface (end surface) of the case body 12 and a portion that functions as the contact portion 60 .

In the following description, the contact portion 60 formed in the housing portion 50 will be referred to simply as the "first contact portion 61", and the contact portion 60 formed in the rotating shaft mounting portion 52 will be simply referred to as the "second contact portion 61". 62” and the contact portion 60 formed on the contact surface portion 54 may be simply referred to as a “third contact portion 63”.

The accommodation portion 50 has a substantially circular opening, and a first contact portion 61 is formed so as to surround the opening. More specifically, as shown in FIG. 4 , the upper end surface of the housing portion 50 is formed to a position where it contacts the parking pole 32 , and the upper end surface of the housing portion 50 is the contact surface of the parking pole 32 . It is formed as the first contact portion 61 that becomes Furthermore, as shown in FIG. 3, the first contact portion 61 is formed above the opening of the housing portion 50 and has an arcuate shape along the opening.

Incidentally, in the conventional parking lock device 120, the end surface 151 of the accommodating portion 150 is positioned so as not to contact the parking pole 32 (see reference numeral 151 in FIG. 5). On the other hand, in the parking lock device 20 of this embodiment, as shown in FIG.

Further, the rotary shaft mounting portion 52 is formed up to a position where it contacts the parking pole 32 , and an end surface of the rotary shaft mounting portion 52 is provided as a second contact portion 62 . That is, the second contact portion 62 is formed so as to surround the rotating shaft 33 . Further, the contact surface portion 54 is provided in the vicinity of the meshing portion 32 a and is formed up to a position where it contacts the parking pole 32 . That is, the third contact portion 63 is provided near the meshing portion 32a.

All the contact portions 60 (the first contact portion 61, the second contact portion 62, and the third contact portion 63) are in a state where the meshing portion 32a and the parking gear 30 are meshed (P lock state) and It is formed so as to be able to come into contact with the parking pole 32 through the state (disengaged state) in which the meshing portion 32a and the parking gear 30 are separated from each other (see FIGS. 6 to 8).

As shown in FIG. 2, the parking pole 32 is formed with a meshing portion 32a that meshes with the parking gear 30. As shown in FIG. Further, the parking pole 32 is attached to the case body 12 so as to be able to swing about the rotating shaft 33 as a fulcrum. Of the two ends of the parking pole 32, one end (tip 32b) is provided with a meshing portion 32a that can mesh with the parking gear 30, and the other end (base end 32c) can come into contact with the cam 36. placed in position.

In the following description, of the two ends of the parking pole 32, the end on the side of the parking gear 30 (the end on which the meshing portion 32a is formed) will be referred to as the "tip 32b", and the end on the cam 36 side will be referred to as "tip 32b". In some cases, it is described and described as "the proximal end 32c".

The parking rod 34 is a rod-shaped member that can move relative to the parking pole 32 . The parking rod 34 is movable forward and backward with respect to the parking pole 32 in accordance with the swing of the parking lever 43 . As shown in FIG. 2 , one end of the parking rod 34 is connected to the parking lever 43 . Further, as shown in FIG. 4 , the other end (tip) of the parking rod 34 is arranged in the housing portion 50 .

The cam 36 is attached to the parking rod 34 while being biased by a spring 37, and contacts the parking pole 32 to swing the parking pole 32. As shown in FIG. As shown in FIG. 4, the cam 36 is a member having a top-like appearance, and has different radial sizes in the axial direction. More specifically, as shown in FIG. 4, the cam 36 has two tapered portions with different inclinations, a first tapered portion 36a with a large inclination on the distal end side and a second tapered portion 36a with a small inclination on the proximal end side. It has a two-tapered portion 36b. A boundary between the first tapered portion 36a and the second tapered portion 36b is a portion (bent portion 36c) where the cross-sectional shape is bent.

The parking support 38 is a member for guiding movement of the cam 36 . As described above, parking support 38 is attached to housing 50 .

As shown in FIG. 5, in the parking lock device 20 of the present embodiment, the parking support 38 is closer to the inner side of the accommodating portion 50 (see the phantom line in FIG. 5) than the parking support 138 of the conventional parking lock device 120 (see the phantom line in FIG. 5). bottom). More specifically, in the parking lock device 20 of the present embodiment, the parking support 38 is in a position where it can come into contact with the parking rod 34 in the process of shifting from the P-lock standby state to the P-lock state. provided at a position that limits the inclination of the

<Regarding the status of the parking lock device>
Next, the state of the parking lock device 20 and the positions of the parking pole 32 and the cam 36 in each state will be described with reference to FIGS.

In the parking lock device 20, the control shaft 42 rotates in conjunction with the driver's shift operation, and the parking lever 43 attached to the control shaft 42 swings. In addition, the parking rod 34 and the cam 36 move forward and backward with respect to the parking pole 32 by swinging the parking lever 43, thereby swinging the parking pole 32. As shown in FIG.

As a result, the parking lock device 20 changes between a state in which the meshing portion 32a and the parking gear 30 are released (disengaged state) and a state in which the meshing portion 32a and the parking gear 30 are meshed (P-lock state). .

<Release state>
As shown in FIG. 6, when the proximal end 32c of the parking pole 32 is not lifted by the cam 36, the distal end 32b of the parking pole 32 is lifted by the biasing force of the torsion spring 40 (not shown in FIG. 6). It is maintained at a position where it does not mesh with the parking gear 30 .

<P lock state>
As shown in FIG. 7(b), when the shift device (not shown) is operated to shift to the P range, the parking rod 34 moves toward the parking pole 32, and the parking pole 32 moves toward the proximal end 32c. is pushed by the cam 36 and rides on the cam 36. As shown in FIG. 7A, the base end 32c of the parking pole 32 is pushed upward Up against the biasing force of the torsion spring 40 (not shown in FIG. 7), and the distal end 32b is pushed downward Lw. As a result, the meshing portion 32 a meshes with the parking gear 30 . This locks the drive wheels of the vehicle.

<P lock standby state>
Here, in the parking lock device 20, when the gearshift is put into the P range when the vehicle is stopped, when the meshing portion 32a of the parking pole 32 comes into contact with the outer circumference (outer diameter) of the parking gear 30, the cam The parking pole 32 comes into contact with the cam 36 so as to straddle the bent portion 36c of 36 (P lock standby state) (see FIG. 8B). Also, when the drive wheels move several centimeters in the P lock standby state, the parking gear 30 rotates in conjunction with it, and the cam 36 lifts the parking pole 32 by the force of the spring 37 attached to the parking rod 34 . As a result, the parking pole 32 and the parking gear 30 are engaged with each other, resulting in a P-locked state (see FIG. 7).

That is, in a state where the meshing portion 32a is in contact with the outer diameter of the parking gear 30 and waits for meshing between the meshing portion 32a and the parking gear 30 (P lock standby state), the first tapered portion 36a and the second tapered portion The parking pole 32 comes into contact with the cam 36 so as to straddle the bent portion 36c that is the boundary with 36b (see FIG. 8B), and when the parking pole 32 is received by the second tapered portion 36b of the cam 36, the parking pole 32 is locked (see FIG. 8B). 7(b)) structure.

Here, as shown in FIG. 11, in the conventional parking lock device 120, in the vicinity of the contact portion between the parking pole 132 and the cam 136, there is a gap S between the accommodation portion 150 formed in the case body 112 and the parking pole 132. is provided, and a contact surface for restricting the movement of the parking pole 132 is not provided. Therefore, the parking pole 132 moves in the process of shifting from the P-lock standby state to the P-lock state, causing rattling (see FIG. 11(a)).

As described above, in the conventional parking lock device 120, since the parking pole 132 is loose (because the position of the parking pole 132 is not stable), the timing at which the parking pole 132 rides on the second tapered portion 136b of the cam 136 varies. I was lucky. In addition, the timing at which the parking pole 132 straddles the bent portion 136c (the timing at which the parking pole 132 rides on the second tapered portion 136b) fluctuates according to the rattling amount, and the P-lock timing fluctuates.

On the other hand, in the parking lock device 20 of the present embodiment, the accommodating portion 50 is provided with the contact portion 60 that functions as a contact surface for the parking pole 32 and restricts the movement of the parking pole 32 .

As a result, the parking lock device 20 can suppress rattling of the parking pole 32 and stabilize the timing of locking the parking gear 30 .

In addition, by reducing variations in P-lock timing, the engagement vehicle speed (vehicle speed at which the gear and parking pole are engaged and locked) is stabilized when the vehicle is shifted to P-range due to an erroneous operation while the vehicle is in motion. do. For example, in a conventional parking lock device, when the vehicle is moving at a speed of 7 km/h and is shifted to the P range due to an erroneous operation, etc., the vehicle is locked at a high speed (for example, 5 km/h) or at a low speed (for example, 2 km/h). /h), the parking lock device 20 of the present embodiment locks stably at a predetermined vehicle speed (for example, 3 km/h).

As a result, it becomes easier to target the meshing vehicle speed, and locking at a high vehicle speed can be reduced. As a result, the durability of each part can be improved.

Further, in the parking lock device 20 of the present embodiment, the contact portion 60 is formed so as to be able to contact the parking pole 32 through the P lock state and the released state.

More specifically, in the parking lock device 20, the contact portions 60 (first contact portion 61, second contact portion 62, and At least part of the third contact portion 63) is provided in a range or position where it always contacts the parking pole 32 (see FIGS. 6 to 8).

For example, as shown in FIG. 6(a), in the released state, the first contact portion 61 has a portion near the rotation shaft 33 (the left side of the first contact portion 61 in FIG. 6(a)) that mainly serves as a parking pole. 32. Further, as shown in FIG. 7( a ), the first contact portion 61 mainly contacts the parking pole 32 at the upper portion thereof in the P-locked state. As described above, although the contact range of the first contact portion 61 changes depending on the swing angle of the parking pole 32, the contact area of the first contact portion 61 is always at least one contact regardless of the swing angle of the parking pole 32 (in any state). It has a range and a shape such that the portion contacts the parking pole 32 .

As a result, the parking lock device 20 can suppress the rattling of the parking pole 32 by keeping the contact portion 60 in contact with the parking pole 32 at all times while minimizing the formation of the contact portion 60 . In addition, it is possible to prevent the parking pole 32 from being caught (ridden over) by the contact portion 60 when the posture of the parking pole is changed such as in the P-locked state or the released state.

Furthermore, in the parking lock device 20 of the present embodiment, the contact portions 60 include a first contact portion 61 provided in the housing portion 50 and a second contact portion 62 formed to surround the rotating shaft 33. , and a third contact portion 63 provided in the vicinity of the meshing portion 32a.

As a result, the parking lock device 20 provides the contact portion 60 (second contact portion 62) at the position (rotational shaft 33) that serves as the swinging fulcrum of the parking pole 32, and both ends that serve as free ends (rotational center). A contact portion 60 (a first contact portion 61 and a third contact portion 63) is provided on both sides). Therefore, rattling of the parking pole 32 can be suppressed more efficiently.

Further, in the parking lock device 20 of the present embodiment, a portion (upper side) of the accommodation portion 50 is formed up to a position where it contacts the parking pole 32, and a portion of the end surface of the accommodation portion 50 is a contact portion 60. It is formed as (first contact portion 61).

Thereby, the parking lock device 20 can suppress rattling of the parking pole 32 with a simple configuration without adding a separate member.

<When transitioning from the P lock standby state to the P lock state>
Here, as shown in FIG. 9(b), in the conventional parking lock device 120, the spring 137 of the parking rod 134 is bent during the transition from the P-lock waiting state to the P-lock state. tilts (the tip side jumps up). As a result, the position of the bent portion 136c of the cam 136 with respect to the parking pole 132 is displaced toward the rearward side of the parking rod 134, and there is a concern that the contact surface (contact distance K) between the parking pole 132 and the cam 136 is reduced.

More specifically, as shown in FIG. 9(b), in the conventional parking lock device 120, in the process of shifting from the P-lock standby state to the P-lock state, the parking support 138 is moved to a position where the inclination of the parking rod 134 is not restricted. was attached. Therefore, the conventional parking lock device 120 is not configured to reduce the amount of inclination of the parking rod 134 in the process of shifting from the P-lock standby state to the P-lock state (inclination angle relative to the angle of the parking rod 134 in the P-lock state). .

On the other hand, in the parking lock device 20 of the present embodiment, the position of the parking support 38 is lowered by a distance B (see FIG. 5) as compared with the conventional parking lock device 20 . More specifically, in the parking lock device 20 of this embodiment, the parking support 38 is in a position where it can contact the parking rod 34 in the process of shifting from the P-lock standby state to the P-lock state, and the parking rod 34 provided at a position that limits the inclination of the

In other words, in the parking lock device 20 of the present embodiment, the upper portion of the inner peripheral surface of the parking support 38 is configured to be closer to the inner side of the accommodating portion 50, thereby allowing the parking lock device 20 to move from the position P lock standby state. The amount of displacement (the amount of inclination) of the parking rod 34 in the process of shifting to the P lock state is reduced.

As a result, the parking lock device 20 reduces the amount (the amount of inclination) of the parking rod 34 (see reduction amount A in FIG. 9A), and secures the engagement K between the cam 36 and the parking pole 32. can do. As a result, the parking lock timing can be further stabilized.

It should be noted that if the contact surface between the parking pole 132 and the cam 136 is increased as illustrated in FIG. 12, it is possible to increase the engagement margin. However, if the contact surface of the parking pole 132 is increased, it becomes easier to lock at a high vehicle speed. Therefore, it runs counter to the problem of suppressing locking at high vehicle speeds. On the other hand, the parking lock device 20 of the present embodiment is advantageous because it can suppress locking at high vehicle speeds.

Although the parking lock device 20 according to the embodiment of the present invention has been described above, the present invention is not limited to the above-described embodiment.

For example, in the parking lock device 20 according to the above-described embodiment, an example in which the first contact portion 61 is formed on the upper side of the housing portion 50 is shown, but the parking lock device of the present invention is not limited to the above-described embodiment. . Specifically, according to the parking lock device of the present invention, the first contact portion may be provided on the side or below the accommodation portion according to the arrangement of the members that constitute the parking lock device.

The present invention is not limited to what has been shown as embodiments above, but other embodiments are possible in the spirit and teachings thereof without departing from the scope of the claims. The constituent elements of the above-described embodiments may be arbitrarily selected and combined. Any component of the embodiment and any component described in the means for solving the invention or a component embodying any component described in the means for solving the invention may be arbitrarily combined. may be configured

INDUSTRIAL APPLICATION This invention can be suitably employ|adopted as a parking lock apparatus of a vehicle.

REFERENCE SIGNS LIST 10 transaxle 12 case body 20 parking lock device 30 parking gear 32 parking pole 32a meshing portion 33 rotating shaft 34 parking rod 36 cam 36a first taper portion 36b second taper portion 36c bent portion 37 spring 38 parking support 50 accommodating portion 60 contact contact portion 61 first contact portion (contact portion)
62 second contact portion (contact portion)
63 third contact portion (contact portion)

Claims (3)

parking gear and
a parking pole including a meshing portion that meshes with the parking gear, and provided swingably about a rotating shaft;
a parking rod that is relatively movable with respect to the parking pole;
a cam attached to the parking rod and in contact with the parking pole to swing the parking pole;
and an accommodating portion in which a part of the parking rod is accommodated,
The parking lock device, wherein the accommodating portion is provided with a contact portion that functions as a contact surface for the parking pole and restricts movement of the parking pole in a direction along the rotation axis. A state in which the meshing portion and the parking gear are meshed is referred to as a P-lock state;
When the state in which the engagement between the meshing portion and the parking gear is released is defined as a released state,
2. The parking lock device according to claim 1, wherein the contact portion is formed so that at least a portion of the contact portion can contact the parking pole in the P lock state and the unlocked state. Equipped with a parking support that guides the movement of the cam,
A state in which the meshing portion is in contact with the outer diameter of the parking gear and waits for meshing between the meshing portion and the parking gear is defined as a P lock standby state,
When the state in which the meshing portion and the parking gear are meshed is defined as a P-lock state,
The parking support is provided at a position that allows contact with the parking rod in the process of shifting from the P-lock standby state to the P-lock state and at a position that limits the inclination of the parking rod. The parking lock device according to claim 1 or 2, wherein:

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