JP4194884B2 - Parking brake operation device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a parking brake operating device, and more particularly to a parking lock mechanism that prevents a parking knob from being easily released due to a release knob being pushed due to child mischief or vehicle theft during parking.
[0002]
[Prior art]
(a) An operation lever that is arranged to be rotatable around the support shaft and has a cylindrical grip on the tip side, and (b) a return rotation of the operation lever to the original position side. A parking maintenance mechanism for blocking, and (c) a release knob that is disposed at the distal end of the grip portion of the operation lever so as to be capable of being pushed and releases the parking maintenance mechanism when pushed. The parking brake is activated by rotating the lever from the original position, and the parking maintaining mechanism prevents the return rotation of the operating lever to maintain the parking brake operating state. When the parking maintenance mechanism is released, the operation lever is returned to the original position and rotated to release the parking brake. Parking brake operation devices are frequently used. In such a parking brake operation device, the release knob is pushed in due to a child's mischief during parking, and the parking maintenance mechanism is released and the parking brake is not released. Various parking lock mechanisms have been proposed. For example, in Patent Document 1, the release knob protruding from the gripping portion has an irregular shape and is brought into contact with the end surface of the gripping portion by being rotated around the axis, so that the pushing operation is disabled. In Patent Document 2, a lock key such as a cylinder lock is provided, and the release knob can be locked so as not to be pushed by a key operation.
[0003]
[Patent Document 1]
Japanese Utility Model Publication No. 4-130576 [Patent Document 2]
Utility Model Registration No. 3041031 Publication [0004]
[Problems to be solved by the invention]
However, in the device described in Patent Document 1, since the release knob protrudes completely from the tip of the gripping portion, there is a risk of rattling when the vehicle travels, and an attempt to push in when parking. However, there is a possibility that the pressing operation may be impossible due to the displacement of the grip portion, and the operability is poor. In addition, since the release knob and the fitting hole of the gripping part have an irregular cross section, it can be easily found that if the release knob is rotated during vehicle theft, it can be pushed in, and the effect as a theft prevention measure cannot be expected so much. . On the other hand, in Patent Document 2, an expensive lock key is required and the cost is high. On the other hand, troublesome key operation is necessary and the operability is poor, and the key may be lost and the parking brake may not be released.
[0005]
The present invention has been made in the background of the above circumstances, and an object of the present invention is to provide an inexpensive parking lock mechanism that can lock the parking brake in an unreleasable manner with a simple operation and can also be expected to have an anti-theft effect. It is in.
[0006]
[Means for Solving the Problems]
In order to achieve such an object, the first invention includes (a) an operation lever that is arranged to be rotatable around a support shaft and has a cylindrical gripping portion provided on the tip end side, and (b) A parking maintaining mechanism that prevents the operation lever from returning to its original position, and (c) a push-in operation is arranged at the tip of the grip of the operation lever so that the operation lever can be operated via a release rod. A release knob for releasing the parking maintenance mechanism, and (d) operating the parking brake by rotating the operation lever from the original position, and rotating the operation lever by the parking maintenance mechanism. The parking brake is maintained, the release knob is pushed in and the parking maintenance mechanism is released, and the operating lever is moved to the original position side. In the parking brake operating device that allows the parking brake to be released by rotating back, (e) the release knob is provided separately from the release rod, and is always protruded from the grip portion by a return spring. While being held in position, the protruding position is fitted to the gripping portion so as to be rotatable between a predetermined first position and a second position around the center line of the gripping portion, while (f ) When the release knob is rotated to the first position, it can be engaged with the release rod, and the release rod is moved against the urging force of the return spring to move the release rod. The maintenance mechanism is released, but when it is rotated to the second position, the engagement with the release rod is impossible and the push-in operation is not performed. Parking lock mechanism that Rerizunobu by Rukoto is to disable the release of the parking maintenance mechanism despite pushed inwardly of the grip portion is provided straddling its Rerizunobu a release rod, And (g) the parking lock mechanism includes: (g-1) a knob receiver integrally provided on the release rod so as to be rotatable relative to the release knob; and (g-2) the knob receiver on the release knob. a contact projecting portion provided so as to project axially towards the, (g-3) provided on the side facing the Rerizunobu of receiving the knob, the first position thereof Rerizunobu is in said projecting position In the state where the knob is rotated, the knob protrusion and the release knob are prevented from approaching in the axial direction. In the state of being rotated to the position, the abutment and protrusion abutting without its knob receiver and abutting receiving part and the Rerizunobu is allowed to relatively approach the axial direction, (g-4) wherein The release knob is provided on one of the knob receiver and the release knob, and the release knob is engaged with the other member when the release knob is rotated around the center line at the protruding position, whereby the release knob is engaged with the first position and the second position. And a stopper for positioning at each position .
[0008]
According to a second aspect of the present invention, in the parking brake operating device according to the first aspect of the present invention, (a) the contact protrusion is plate-shaped, and (b) the knob receiver has the plate-shaped contact protrusion. A recessed groove into which the groove can enter is formed, and the contact receiving portion is constituted by a pair of side wall portions on both sides of the recessed groove, and (c) the release knob is rotated to the first position at the protruding position. In this state, the abutting protrusion is brought into contact with the front end surface of the side wall to prevent the knob receiver and the release knob from approaching in the axial direction, and in a state where the release knob is rotated to the second position, It is allowed that the knob receiver and the release knob are relatively close to each other in the axial direction when the abutting protrusion enters the concave groove.
[0010]
【The invention's effect】
In the parking brake operating device of the first aspect of the invention, between the Rerizunobu and release the parking lock mechanism straddling the rod is provided with, Rerizunobu a first position and a second position projecting from the gripping tip of the operation lever The parking brake can be locked and unlocked simply by rotating the handle, and the release knob is fitted to the gripping part even in the protruding position, so the position and posture are stable, and the release knob can be used to lock and unlock. Improve. In addition, since the tip shape of the release knob protruding from the grip portion is not particularly limited, it is not always easy to know how to release the parking lock mechanism when the vehicle is stolen, and an effect as a vehicle antitheft measure can be expected. Compared with the case where a lock key such as the above is used, there is no risk of losing the key and the structure is inexpensive.
[0011]
In addition, since the release rod is provided with a knob holder and a parking lock mechanism is provided across the knob holder and the release knob, the degree of freedom of the configuration of the parking lock mechanism is high, and each other via the stoppers. By engaging, stable operation and operability can be obtained. Further, since either the release knob or the knob receiver is provided with a stopper, and the release knob is positioned at the first position and the second position, the parking brake can be locked and unlocked by rotating the release knob. Is further improved.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
Here, the parking maintenance mechanism includes, for example, (a) a ratchet member in which meshing teeth are formed along one arc centering on a rotation center (support shaft) of the operation lever, and (b) the operation lever. A pole that is attached to the operating lever so as to be rotatable about an axis parallel to the center of rotation of the motor, and is engaged with the meshing teeth to prevent the operating lever from returning to its original position, c) a meshing spring that biases the pole in a direction to mesh with the meshing teeth. In addition to the meshing between the pole and the ratchet member, the return of the operation lever by friction, a lock coil, etc. Various aspects are possible, such as those that prevent rotation. For example, the release rod is connected to the pole, and is rotated against the urging force of the engagement spring via the release rod in accordance with the pushing operation of the release knob, and the engagement with the ratchet member is performed. By being released, the control lever is configured to allow return rotation to the original position side.
[0014]
The operating lever is mechanically connected to the parking brake via a connecting member such as a brake cable, for example. When the operating lever is rotated from its original position, the parking brake is operated by tightening the brake cable. Configured as follows.
[0015]
A return spring for urging the record Rizunobu the protruding position in such a compression coil spring, for example, is disposed between the Rerizunobu the operating lever or the release rod can be disposed between the receiving knob.
[0016]
The release knob has, for example, a stepped cylindrical shape, and a small diameter portion protrudes from the tip of the gripping portion, and a protruding position is defined by engaging a step portion with the large diameter portion to the tip of the gripping portion and the like. Further, at least one of the large-diameter portion and the small-diameter portion may be fitted to the grip portion so as to be relatively rotatable and relatively movable in the axial direction. In addition, while adopting a simple cylindrical release knob and providing a pin or the like protruding in the radial direction to define the protruding position, the shape of the release knob is appropriately determined. The protruding portion protruding from the tip of the gripping portion can be made elliptical or oval to facilitate the rotation operation.
[0017]
It is also possible to provide a biasing means such as a torsion coil spring or a spiral spring between the release knob and the gripping part or between the release rod so that the release knob is always held at the second position . The Rerizunobu using the return spring may be held in the second position.
[0018]
In other words, the contact protrusions and contact receiving parts mean that recesses that allow relative access to portions other than the contact protrusions and the contact receiving parts are provided.
[0019]
Scan stopper is a single stopper may be provided a pair corresponding to the first position and a second position, defining a second position in the circumferential direction of the other end as well as defining the first position in the circumferential direction of the end Various modes are possible, such as being able to adopt.
[0022]
【Example】
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
In FIG. 1, a parking brake operating device 10 includes a substantially flat sector 12 fixed substantially vertically to a floor of a vehicle body (not shown), and around the axis of the support pin 14 via a support pin 14 to the sector 12. An operation lever 16 and the like arranged to be rotatable are provided. The operation lever 16 is formed by bending a metal plate material, and its proximal end is bent in a U-shape and is disposed so as to straddle the sector 12. The brake cable 20 is connected via the via. A grip portion 21 rounded into a substantially cylindrical shape is provided on the distal end side of the operation lever 16, and a resin grip 22 is fitted. The grip 22 is gripped, and the right side of the support pin 14 in FIG. By rotating around, the brake cable 20 is tightened, and a parking brake for a wheel (not shown) is operated. The support pin 14 corresponds to a support shaft.
[0023]
The sector 12 is formed with meshing teeth (saw teeth) 24 along an arc shape centered on the support pin 14, while the operating lever 16 has a pole 26 meshed with the meshing teeth 24. It is arranged so as to be rotatable around a pin 28 parallel to the support pin 14. A release rod 34 is connected to the pole 26 so as to be relatively rotatable, and the release rod 34 is always connected to the pole 26 by a meshing spring (in the embodiment, a compression coil spring) 30 disposed in the grip portion 21. While being biased in the direction of meshing with the meshing teeth 24, the release knob 32 disposed at the tip of the gripping portion 21 is pushed in, so that the right side of FIG. It is moved in the direction (the base end side of the operating lever 16), and the pawl 26 is rotated clockwise around the pin 28 to release the meshing with the meshing teeth 24. One end of the meshing spring 30 is hooked to a locking portion (not shown) bent and raised inward in the grip portion 21.
[0024]
When the operation lever 16 is rotated clockwise from the original position shown in FIG. 1, the brake cable 20 is tightened and the parking brake is activated. At this time, along with the rotation operation, the pawl 26 is moved around the pin 28 while sequentially rotating around the pin 28 against the urging force of the engagement spring 30, and the rotation operation is stopped. By maintaining the meshing between the meshing teeth 24 and the pawl 26 that are meshed with each other at this time, the return rotation of the operation lever 16 is prevented and the operating state of the parking brake is maintained. Further, when the release knob 32 is pushed in while the operating lever 16 is further pulled up and down, the pole 26 is rotated clockwise around the pin 28 via the release rod 34 and meshed with the meshing teeth 24. In this state, when the operation lever 16 is rotated counterclockwise to the original position, the brake cable 20 is loosened and the parking brake is released. The sector 12 provided with the meshing teeth 24 corresponds to a ratchet member, and a parking maintenance mechanism 36 is configured including the sector 12 and the pole 26.
[0025]
FIG. 2 is a cross-sectional view showing the distal end portion of the operation lever 16 in the parking brake operating device 10, that is, the portion where the release knob 32 is disposed. A knob receiver 40 is integrally fixed to the release rod 34 by screw fastening or the like. The release knob 32 is engaged with the release knob 32 via the parking lock mechanism 38 in a fixed relationship. 3 is an exploded perspective view showing the release knob 32 and the knob receiver 40, and FIG. 4 is an end view of the release knob 32 and the knob receiver 40 on opposite sides.
[0026]
The release knob 32 is made of synthetic resin, and has a cylindrical large-diameter fitting portion 42 provided at an intermediate position in the axial direction, and a large-diameter fitting provided concentrically at one end side in the axial direction of the large-diameter fitting portion 42. A cylindrical push-in operation portion 44 having a smaller diameter than the joint portion 42, and a plate-like abutting protrusion 46 perpendicular to the shaft center provided on the opposite side to the push operation portion 44 so as to protrude in parallel with the shaft center; Is integrated. The large-diameter fitting portion 42 is slightly smaller in diameter than the inner diameter of the cylindrical gripping portion 21 and is fitted in the gripping portion 21 so as to be rotatable and movable in the axial direction. A push-out operation is possible by projecting to the outside (front end side) from a through hole 48 provided in the front end cover portion 22. Further, a return spring (compression coil fluffing in the embodiment) 50 is interposed between the abutting protrusion 46 and the knob receiver 40, and is always (a-1), (b-1) in FIG. ), The push-in operation portion 44 protrudes to the outside from the through hole 48, and the stepped portion with the large-diameter fitting portion 42 is held at the protruding position where it abuts on the peripheral edge portion of the through hole 48. . The knob receiver 40, which is integrally fixed to the release rod 34, is urged toward the distal end side (left direction in FIG. 2) of the grip portion 21 by the meshing spring 30. The moving end on the meshing side defined by the meshing is set so as to leave a predetermined gap with the release knob 32 held at the protruding position, and the release knob 32 is exclusively in accordance with the urging force of the return spring 50. It is held in the protruding position.
[0027]
The knob receiver 40 is made of a synthetic resin and has a cylindrical shape slightly smaller in diameter than the inner diameter of the gripping portion 21, and is positioned substantially concentrically with the gripping portion 21. The release rod 34 is integrally connected, and the other end of the meshing spring 30 is seated on the knob receiver 40, while the contact protrusion 46 is formed on the surface facing the release knob 32. Also, the groove 52 is provided with a slightly wider width so as to be orthogonal to the axis. The release knob 32 can hold the pushing operation portion 44 while being held at the protruding position and can be rotated around the axis, that is, around the center line of the holding portion 21, as shown in FIG. As shown in (b-2), when the abutting protrusion 46 is rotated to the second position that is parallel to the concave groove 52 and coincides with each other in the axial direction, even if the pushing operation portion 44 is pushed, The engagement with the knob receiver 40 becomes impossible only by the contact protrusion 46 entering the concave groove 52, and the release of the parking maintenance mechanism 36, that is, the release of the engagement between the pawl 26 and the meshing teeth 24 becomes impossible. The return operation of the operation lever 16, that is, the parking brake release operation cannot be performed. The urging force of the return spring 50 is sufficiently weaker than the urging force of the meshing spring 30, and only the return spring 50 is bent and deformed while the knob receiver 40 is held at the meshing side moving end by the meshing spring 30. Further, the depth dimension of the concave groove 52 and the projecting dimension of the contact projecting portion 46 allow the knob receiver 40 to be held at the moving end on the meshing side regardless of the pushing operation of the release knob 32. The size is set to be larger than 32 pushing operation strokes.
[0028]
On the other hand, the release knob 32 is rotated from the second position to the first position rotated about 90 ° around the center line of the gripping portion 21 as shown in FIGS. 2 (a-1) and (a-2). Then, the abutting protrusion 46 is in a posture substantially orthogonal to the concave groove 52 and is brought into contact with the distal end surfaces of the pair of side wall portions 54 and 56 on both sides of the concave groove 52. Thereby, the relative approach between the release knob 32 and the knob receiver 40 is prevented, and when the pushing operation portion 44 is pushed, the knob holder 40 and further the release rod 34 are engaged with the meshing spring as the release knob 32 moves. It is moved to the base end side of the operation lever 16 against the urging force of 30, and the pawl 26 of the parking maintaining mechanism 36 is rotated clockwise around the pin 28, and the meshing with the meshing tooth 24 is released. The return operation of the operation lever 16, that is, the release operation of the parking brake is allowed. The side wall portions 54 and 56 correspond to contact receiving portions .
[0029]
Further, when the release knob 32 is engaged with the side surface of the abutting protrusion 46 when the release knob 32 is rotated around the center line of the gripping portion 21, the release knob 32 is engaged with the side walls 54 and 56. Stoppers 58 and 60 are provided so as to be positioned at the position and the second position, respectively. Even if the stoppers 58 and 60 are single, both end faces in the circumferential direction are respectively engaged with the side surfaces of the contact protrusions 46, so that the release knob 32 can be positioned in the first position and the second position. May be provided. The protruding dimensions of these stoppers 58 and 60 are such that the release knob 32 is held at the protruding position in accordance with the urging force of the return spring 50 as shown in FIGS. In a state where 40 is held at the moving end on the meshing side in accordance with the urging force of the meshing spring 30, the dimension is set such that it can be engaged with the contact protrusion 46. In the present embodiment, the parking lock mechanism 38 is configured by the abutting protrusion 46, the recessed groove 52, the side walls 54 and 56, the stoppers 58 and 60 , and the like.
[0030]
Accordingly, the operation lever 16 is rotated clockwise around the support pin 14, and the parking brake is operated in a state where the pawl 26 is engaged with the meshing tooth 24 and the return rotation of the operation lever 16 is prevented. When the release knob 32 is rotated to the second position as shown in FIG. 2 (b-1) by the rotation operation of the operation unit 44, the parking brake is brought into a locked state where it cannot be released. That is, even if the release knob 32 is pushed in, as shown in FIG. 2 (b-2), the contact protrusion 46 only enters the concave groove 52, and the engagement with the knob receiver 40 becomes impossible. Accordingly, the release of the operation lever 16 is disabled, and the parking brake cannot be released. Further, when the release knob 32 is returned to the first position as shown in FIG. 2 (a-1) by the rotation operation of the pushing operation unit 44, the parking brake is unlocked and the parking brake can be released. Become. That is, since the abutting protrusion 46 can abut on the tip surfaces of the side walls 54 and 56 on both sides of the concave groove 52, when the release knob 32 is pushed, as shown in FIG. As the release knob 32 is moved, the knob receiver 40 and the release rod 34 are moved to the proximal end side of the operation lever 16, and the engagement between the pawl 26 and the engagement teeth 24 is released. The parking brake can be released by turning 16 back to the original position.
[0031]
As described above, in the parking brake operating device 10 of the present embodiment, the parking lock mechanism 38 is disposed across the release knob 32 and the release rod 34, and the release knob 32 protrudes from the tip of the grip portion 21 of the operation lever 16. The parking brake can be locked and unlocked simply by rotating between the first position and the second position, and the release knob 32 is fitted to the gripping portion 21 even in the protruding position. The posture is stabilized, and the operability of locking and unlocking by the release knob 32 is improved.
[0032]
Further, the shape of the pushing operation portion 44 of the release knob 32 protruding from the gripping portion 21 is not particularly limited, and in this embodiment, it has a cylindrical shape, so that it is possible to know a method of releasing the parking lock mechanism 38 in the case of vehicle theft. This is not always easy, and can be expected to be effective as a vehicle antitheft measure, and is less expensive and less expensive than a lock key such as a cylinder lock.
[0033]
In the present embodiment, the release rod 34 is provided with a knob receiver 40, and the parking lock mechanism 38 is disposed across the knob receiver 40 and the release knob 32. The degree of freedom is high, and stable operation and operability can be obtained by relatively positioning by the engagement between the plate-like contact protrusion 46 and the stoppers 58 and 60.
[0034]
Further, the side walls 54 and 56 are provided with stoppers 58 and 60, respectively, so that the release knob 32 is positioned at the first position and the second position, respectively, so that the parking brake is locked and unlocked by rotating the release knob 32. The operability is further improved.
[0043]
As mentioned above, although the Example of this invention was described in detail based on drawing, these are one embodiment to the last, and this invention is implemented in the aspect which added the various change and improvement based on the knowledge of those skilled in the art. be able to.
[Brief description of the drawings]
FIG. 1 is a front view in which a part of a parking brake operating device according to an embodiment of the present invention is cut away.
2 is a cross-sectional view showing a portion where the parking lock mechanism of the parking brake operating device of FIG. 1 is provided, wherein (a-1) and (a-2) are the first positions where the release knob can release the parking brake; (B-1) and (b-2) are states in which the release knob is rotated to a second position where the release operation of the parking brake is disabled.
3 is a perspective view showing the parking lock mechanism of FIG. 2 in a divided manner. FIG.
4A is a view showing an end face of a release knob, and FIG. 4B is a view showing an end face of a knob receiver.
[Explanation of symbols]
10: Parking brake operation device 14: Support pin (support shaft) 16: Operation lever 21: Holding part 32: Release knob 34: Release rod 36: Parking maintenance mechanism 38: Parking lock mechanism 40: Knob receiver 46: Abutting protrusion 50 : return spring 52: groove 54, 56: side wall portion (abutting receiving portion) 58, 60: stopper Pas

Claims (2)

An operation lever that is disposed so as to be rotatable around the support shaft, and that has a cylindrical gripping portion on the tip side,
A parking maintaining mechanism for preventing the operation lever from returning to the original position;
A release knob which is disposed at the tip of the grip of the operation lever so as to be capable of being pushed and releases the parking maintenance mechanism via a release rod when the push is operated, and the operation lever rotates from the original position. When operated, the parking brake is activated, the parking maintaining mechanism prevents the return rotation of the operating lever to maintain the operating state of the parking brake, and the release knob is pushed to operate the parking maintaining mechanism. In the parking brake operation device that allows the operation lever to be turned back to the original position side and released to release the parking brake by being released,
The release knob is provided separately from the release rod, and is always held at a protruding position protruding from the gripping portion by a return spring, and the protruding position is predetermined around the center line of the gripping portion. While being fitted to the grip portion so as to be rotatable between the first position and the second position,
When the release knob is rotated to the first position, it can be engaged with the release rod. When the release knob is pushed against the urging force of the return spring, the release rod is moved to move the parking rod. Although the maintenance mechanism is released, it is impossible to engage with the release rod when it is rotated to the second position, and the release knob is pushed inward of the grip portion by being pushed. A parking lock mechanism that disables the release of the parking maintenance mechanism is provided across the release knob and the release rod ,
And the parking lock mechanism is
A knob receiver provided integrally with the release rod so as to be rotatable relative to the release knob;
An abutting protrusion provided on the release knob so as to protrude axially toward the knob receiver;
The knob receiver is provided on the surface facing the release knob. When the release knob is rotated to the first position at the projecting position, the knob receiver and the knob receiver Although the release knob is prevented from approaching in the axial direction, when the release knob is rotated to the second position, the knob receiver and the release knob are relatively in the axial direction without contacting the contact protrusion. An abutment receiving portion that allows approaching; and
The release knob is provided at one of the knob receiver and the release knob, and is engaged with the other member when the release knob is rotated around the center line at the protruding position, thereby allowing the release knob to be engaged with the first position and the first release knob. Stoppers for positioning at two positions,
Parking brake operating device, characterized in that it is configured to have a. While the abutting protrusion has a plate shape,
The knob receiver is provided with a recess groove into which the plate-like contact protrusion can enter, and the contact receiver is configured by a pair of side wall portions on both sides of the recess groove.
In a state where the release knob is rotated to the first position at the projecting position, the contact projecting portion is brought into contact with the front end surface of the side wall portion to prevent the knob receiver and the release knob from approaching in the axial direction. In a state where the release knob is rotated to the second position, the contact protrusion may enter the concave groove so that the knob receiver and the release knob relatively approach each other in the axial direction. The parking brake operating device according to claim 1 , wherein the parking brake operating device is allowed.

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