JP2009143363A - Vehicle lock mechanism - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vehicle parking mechanism having a simplified and small configuration for a vehicle lock mechanism as a whole. <P>SOLUTION: Engagement force for engaging a parking lock gear 1 and a parking lock pole 2 with each other is applied by elastic force of a parking lock spring 4 provided in a predetermined fixed part. Thus, rotation to engage the parking lock pole 2 with the parking lock gear 1 can be secured, so as to appropriately lock the parking lock gear 1. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a vehicle locking mechanism that selectively blocks rotation of a predetermined rotating member, such as restricting wheel rotation and maintaining a parking state.

  An example of this type of parking apparatus is described in Patent Document 1. The device described in Patent Document 1 is configured to apply the elastic force of a spring as a brake operation force of a brake provided on a rear wheel. Therefore, since the brake operation force is generated by the elastic force of the spring in the device of Patent Document 1, it is said that a large brake operation force can be generated regardless of the operation force by the driver. On the other hand, the device of Patent Document 1 is configured to release the brake by contracting the spring using hydraulic pressure.

Japanese Utility Model Publication No. 5-49536

  By the way, in the mechanism that locks in the parking state, if the lock operation is performed before the vehicle is completely stopped, or if the lock operation is mistakenly performed during traveling, the vehicle is not immediately locked and does not decelerate rapidly. It is preferable to do so. In the parking lock mechanism as described above, a locking mechanism that engages with the rotating body is engaged using the driver's operating force, and thus a separate mechanism for preventing immediate locking is required.

  Therefore, conventionally, in order to prevent sudden deceleration of the vehicle due to the engagement as described above, a cam as a buffer member, an elastic member such as a cam spring, and a holding member thereof are interposed.

  This is because the lock operation force is configured to act in the direction of locking the rotating body, as in the invention of Patent Document 1. Therefore, in such a configuration, the number of parts is large, and the overall configuration may be complicated and large.

  The present invention has been made against the background of the above circumstances, and prevents the vehicle from being locked immediately by using the elastic force of the elastic member when the locking operation is performed during traveling, and the whole. An object of the present invention is to provide a vehicular locking mechanism that is simplified and downsized.

  In order to achieve the above object, the invention of claim 1 is directed to a locked rotating body, an engaging member that selectively engages the locked rotating body and stops the rotation, and an operation that operates the engaging member. A locking mechanism for a vehicle, comprising: an elastic member that applies an elastic force in a direction in which the engagement member engages with the locked rotating body; and the operation mechanism is operated to operate the elastic member. A vehicular locking mechanism configured to be pressed in a direction in which the engagement is released against the elastic force of the vehicle.

  The invention according to claim 2 is the vehicle locking mechanism according to claim 1, wherein the elastic member is provided between a predetermined fixing portion and the engagement member.

  According to the first aspect of the present invention, when the vehicle locking mechanism is in a non-operating state, the elastic force of the elastic member acts to engage the engaging member with the locked rotating body. Further, when the rotation speed of the locked rotating body is high, a releasing force in a direction to remove the engaging member from the locked rotating body acts. When this is larger than the elastic force, the engaging member is bounced by the locked rotating body, and a ratcheting state in which engagement is repeatedly prevented occurs. The ratcheting state referred to here indicates that the locked rotating body and the engaging member repeat contact with each other. As a result, the rotation of the locked rotating body rotating at a certain high speed is prevented from being suddenly stopped by being immediately engaged, and thereby causing a sudden deceleration of the vehicle.

  In this way, the elastic member generates a so-called engagement operation force that engages the engagement member with the locked rotating body, and functions as a member that allows the ratcheting state described above. Therefore, the configuration is simplified and the size can be reduced.

  Further, a reaction force against the elastic force, that is, the above-described releasing force is applied to the engaging member from the locked rotating body. That is, the operation force generated by the operation mechanism for releasing the lock acts in the same direction as the release force, and can be suppressed to a small force. Therefore, the operation mechanism can be made small and have a small capacity. Therefore, not only the operation mechanism can be simplified and reduced in size, but also the configuration of the entire apparatus can be simplified and reduced in size.

  Further, according to the invention of claim 2, since the elastic member is provided between the predetermined fixing portion and the engaging member, a complicated mechanism is not interposed, and therefore the configuration of the entire apparatus is simplified. In addition, downsizing can be achieved.

  The vehicle locking mechanism according to the present invention is a mechanism that restricts the rotation of a rotating member such as a wheel, and is configured to lock the output shaft of the transmission in a non-rotatable manner when the vehicle is stopped, for example. More specifically, in FIG. 1, a parking lock gear 1 which is an example of a locked rotor in the present invention includes a power transmission member (not shown) that rotates with wheels, such as an output shaft and a propeller shaft of a transmission. ) And integral rotation and stop. On the outer peripheral portion, convex portions (that is, teeth) and concave portions (that is, tooth grooves) are alternately formed in the circumferential direction. That is, the parking lock gear 1 has an external tooth 1a composed of a concave portion and a convex portion.

  The parking lock pole 2 that engages with the parking lock gear 1 corresponds to the engaging member in the present invention, and a meshing portion 2a that can selectively engage with the external teeth 1a of the parking lock gear 1 is formed on the outer peripheral portion thereof. Has been.

  Further, the parking lock pole 2 is arranged to extend in the tangential direction of the parking lock gear 1 on the opposite side of the parking lock gear 1, specifically, on the lower side, and is rotatable at the middle portion in the longitudinal direction. It is supported. That is, it is rotatably supported by a lock pole shaft 3 attached to a predetermined fixing portion (not shown) that does not rotate.

  The lock pole shaft 3 and the rotation shaft of the parking lock gear 1 are arranged so as to be parallel or substantially parallel.

  The parking lock spring 4, which is an example of an elastic member in the present invention, is provided between a predetermined fixing portion (not shown) such as a non-rotating casing and the parking lock pole 2.

  In FIG. 1, one end of the parking lock spring 4 is fixed to a predetermined fixing portion and the other end is parked so that the elastic force of the parking lock spring 4 acts in a direction to engage with the parking lock gear 1. It arrange | positions so that it may act on the edge part of the lock pole 2. FIG.

  The parking lock spring 4 here is not limited to a coil spring shape, a leaf spring shape, or the like, for example, and may be an elastic member having an elastic force that can implement the present invention.

  The parking lock release actuator 5 which is an example of the parking lock release operation mechanism according to the present invention is arranged so that the operation force acts in a direction against the elastic force of the parking lock spring 4. In FIG. 1, the parking lock pole 2 is disposed at one end of the parking lock pole 2 at the opposite end with the lock pole shaft 3 as a support shaft interposed therebetween.

  The parking lock release actuator 5 here is not limited to, for example, a hydraulic cylinder, a pneumatic cylinder, and an electromagnetic actuator, and may have an operation force that can release the lock by the elastic force of the present invention. That's fine.

  Therefore, in the vehicle locking mechanism according to the present invention, the parking lock pole 2 is moved close to the parking lock gear 1 by the elastic force of the parking lock spring 4 with the lock pole shaft 3 as a fulcrum, and the parking lock is released. It is configured to be able to rotate in both the direction in which the lock is released by the operating force of the actuator 5 for use.

  That is, the lock pole shaft 3 that is the support shaft of the parking lock pole 2 is pivoted around the lock pole shaft 3 as a fulcrum. In FIG. 1, the lock pole shaft 3 rotates in the directions indicated by the arrows St1 and St2.

  Next, the operation of the vehicle locking mechanism will be described with reference to FIG. The parking lock pole 2 is configured to be interlocked with a shift operation of a shift lever (not shown) of the transmission. When the shift lever is switched to the parking position, the parking lock release actuator 5 is moved to the parking lock pole 2. Drive away from the drive. 2 is a transition from the parking lock release state of FIG. 2 (a) to the parking lock state of FIG. 2 (b).

  When the parking lock mechanism operates as described above, the parking lock release actuator 5 is driven, and the parking lock spring 4 returns to its original state by the elastic force. At the same time, the parking lock pole 2 rotates so as to approach the parking lock gear 1. At this time, when the tooth groove between each external tooth 1a and the meshing part 2a repeat ratcheting, and the tooth groove between each external tooth 1a and the meshing part 2a have the same phase, the meshing part 2a The tooth gap between the teeth 1a is entered, and the rotation of the parking lock pole 2 (the rotation to the arrow St2 in FIG. 1) stops. That is, the parking lock pole 2 is pressed against the parking lock gear 1 side by an elastic force, and the parking lock gear 1 and the parking lock pole 2 are engaged with each other.

  As a result, when the parking shift is performed, the meshing portion 2a of the parking lock pole 2 meshes with the tooth gap between the external teeth 1a of the parking lock gear 1, and the rotation of the parking lock gear 1 is locked by the parking lock pole 2. Thus, the rotation of the parking lock gear 1 and the output shaft is restricted. A so-called “mesh” state is obtained. FIG. 2B shows an example of this locked state.

  On the other hand, when the tooth gap between the external teeth 1a and the meshing portion 2a are in different phases on the outer peripheral side of the parking lock gear 1, the parking lock gear 1 meshes with the tip surface of the external tooth 1a. The tip surface facing the portion 2a comes into contact. An example of this state is shown in FIG. When the parking shift is performed, the meshing portion 2a of the parking lock pole 2 is in a so-called “non-meshing” state in which the meshing portion 2a between the external teeth 1a of the parking lock gear 1 is not meshed.

  In the “non-engagement” state, as shown in FIG. 3A, the tooth tip surface and the tip surface come into contact with each other, and the parking lock pole 2 is repelled. However, the parking lock gear is caused by the elastic force of the parking lock spring 4. Returned to 1 side. An example of this state is shown in FIG. As a result, when the tooth gap between the external teeth 1a and the meshing portion 2a are in different phases, the aforementioned ratcheting state is repeated, and the state where the parking lock pole 2 and the parking lock gear 1 do not mesh continues. Is done.

  As a condition for maintaining the “non-engagement” state when the parking shift is performed, for example, when the tooth tip surface of each external tooth 1a and the facing surface of the engagement portion 2a are in contact with each other, or A case where only a part of the facing surface abuts can be considered. Further, the ratcheting state is repeated because the parking lock gear 1 is repelled before the meshing portion 2a is completely meshed with the tooth gap between the external teeth 1a, that is, the rotation speed of the parking lock gear 1 is sufficiently high. The case is considered.

  In other words, since the rotation of the parking lock gear 1 and the output shaft is not restricted while the “non-engagement” state is continued, for example, the tooth gap between the external teeth 1a and the engagement portion 2a are in different phases. In a certain state, when the vehicle stops in the middle of a slope, the vehicle descends the slope, or due to the influence of residual torque such as inertia torque in the power transmission system from the transmission to the wheels, The output shaft, that is, the parking lock gear 1 may rotate.

  The transition from the condition that the aforementioned “non-meshing” state is continued to the “meshing” state will be described with reference to FIG. For example, FIG. 4A illustrates an example of a “non-engagement” state of a different phase in which the “non-engagement” state is continued when the parking shift is performed at the time of a stop. At this time, since the rotation of the parking lock gear 1 is not restricted, the parking lock gear 1 rotates due to the vehicle descent on the slope and the remaining torque. As a result, the meshing portion 2a and each external tooth 1a mesh with each other in the same phase and are locked by the elastic force of the parking lock spring 4. FIG. 4B shows an example of this “engagement” state.

  In addition, the transition from the “non-engagement” state to the same phase from the “non-engagement” state due to the different phases of the external teeth 1a and the meshing portion 2a is, for example, when the lock operation is erroneously performed during high-speed traveling. It is also conceivable that the cycling state is repeated.

  In the high speed range in this case, the ratcheting state between the parking lock gear 1 and the parking lock pole 2 is allowed by the elastic force of the parking lock spring 4 until the low speed range is reached by the braking force of the vehicle. That is, the ratcheting state is continued until the vehicle speed at which the outer teeth 1a and the meshing portion 2a can sufficiently mesh with each other, that is, the vehicle speed range in which the parking lock pole 2 is not repelled by the parking lock gear 1 is reached. Accordingly, when reaching a low speed range where the external teeth 1a and the meshing portion 2a can sufficiently mesh with each other, the parking lock gear 1 and the parking lock pole 2 are meshed with each other by the elastic force of the parking lock spring 4. “Matching” state.

  As described above, in the vehicle locking mechanism according to the present invention, for example, the case where the parking lock gear 1 and the parking lock pole 2 shift from the “non-engagement” state to the “engagement” state, that is, the engagement portion 2a. From the ratcheting state in which the tip surface and the tooth tip surface of the external tooth 1a are in contact, the space between the external teeth 1a and the meshing portion 2a are in mesh with the tooth gap.

  At that time, a parking lock spring 4 which is an elastic member is provided between the parking lock gear 1 and the parking lock pole 2, thereby allowing a ratcheting state and preventing instantaneous engagement. ing.

  As a result, by using the parking lock spring 4 that maintains the locked state while allowing the ratcheting state, sudden deceleration due to the engagement between the parking lock gear 1 and the parking lock pole 2 can be achieved, for example, in a high speed range. In the low speed range or when the vehicle is stopped, the parking lock gear 1 and the parking lock pole 2 can be engaged to lock the vehicle accurately. Therefore, since a complicated mechanism as in the prior art is not interposed, the member for engagement can be simplified and the size can be reduced.

  Further, since the parking lock pole 2 can obtain a force against the elastic force of the parking lock spring 4 from the parking lock gear 1, the parking lock releasing actuator 5 can have a small driving force. Therefore, the configuration of the entire apparatus can be simplified and the size can be reduced.

  The present invention is not limited to the above specific example, and the elastic member only needs to be provided between the engaging member and a predetermined case (not shown) for holding the engaging member. An operating force may be applied in a direction against the elastic force. For example, in the above specific example, the positions of the parking lock pole 2 and the elastic member may be reversed.

  In the above specific example, the elastic member is configured by a member such as a coil spring. However, for example, a leaf spring or rubber may be used. Alternatively, for example, the elastic member of the present invention can be obtained by using a mechanism that can be electromagnetically controlled to obtain engagement performance.

It is a schematic diagram which shows the structural example of the locking mechanism for vehicles of this invention. It is a figure which shows the example of the locked state of this invention, and a lock release state. It is a figure which shows the example of a ratcheting state. It is a figure which shows the example of a non-meshing state and a meshing state.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Parking lock gear, 2 ... Parking lock pole, 3 ... Lock pole shaft, 4 ... Spring for parking lock (elastic member), 5 ... Actuator for parking lock release

Claims (2)

In a vehicle locking mechanism comprising: a locked rotating body; an engaging member that selectively engages the locked rotating body and stops the rotation; and an operation mechanism that operates the engaging member.
An elastic member for applying an elastic force to the engaging member in a direction in which the engaging member engages with the locked rotating body;
The vehicle lock mechanism according to claim 1, wherein the operation mechanism is configured to press the engagement member in a direction in which the engagement is released against an elastic force of the elastic member when operated.   The vehicular locking mechanism according to claim 1, wherein the elastic member is provided between a predetermined fixing portion and the engaging member.

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