JP2526416Y2 - Parking brake operating device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a parking brake operating device for operating a vehicle parking brake.

[Prior Art] Generally, in this type of parking brake, an engagement position of a claw member with a sector gear is changed by rotating an operation lever.

The claw member is configured to be pivotally displaced between an engaged position and a disengaged position by a release rod that can reciprocate in conjunction with the movement of the operation knob constantly biased by a spring. I have.

By the way, as a technique for minimizing the vertical displacement of the release rod due to the rotation of the claw member, the coupling between the claw member and the release rod is not provided by pin connection, but two engagement portions are provided on the claw member. By causing the free end of the release rod to abut on these two engaging portions, the claw member can be rotated in both directions.

FIG. 9 illustrates an example of such a parking brake operating device.

In the parking brake operating device shown in FIG.
A sector 2A fixed to the vehicle body 7, an operation lever 1 rotatably supported by the sector 2A about a shaft 8, and a sector 2A rotatably supported by the operation lever 1 about a shaft 9. And a knob 4 provided in the grip 6 of the operating lever 1 so as to be freely retractable by a spring 5. A release rod for releasing the claw member 2B from the sector 2A in conjunction with the pushing of the knob 4 3 and
have.

The operation lever 1 has one end of a brake operating cable 11 at the lower end of the shaft 8, and the rotation of the operation lever 1 in the direction of the arrow pulls the cable 11 in the direction of the arrow, whereby the parking brake body ( (Not shown) is activated.

The claw member 2B has a first engagement portion 2b and a second engagement portion 2b.
'Are formed. Further, in the release rod 3, the bent end portion 3a of the release rod 3 is provided at both engagement portions of the claw member 2B.
It is arranged between 2b and 2b '. An elastic support member 10 for preventing interference between the release rod 3 and the inner wall of the operation lever 1 is provided inside the grip portion 6.

In the device having the above-described configuration, the tip bending portion 3a of the release rod 3 urged back by the spring 5 comes into contact with the first engagement portion 2b of the claw member 2B, and thereby the claw member 2B is moved to the sector 2A. It can be biased to rotate in the direction of engagement with the teeth 2a. When the knob 4 is pushed in, the bent end portion 3a of the release rod 3 comes into contact with the second engaging portion 2b 'of the claw member 2B, thereby rotating the claw member 2B in a direction to disengage from the teeth 2a of the sector 2A. Can be energized.

In the device having the above configuration, the movement of the release rod 3 in the radial direction is restricted by the elastic support member 10.

FIG. 10 shows an example of the elastic support member 10. The elastic support member 10 includes a rod holding tube portion 12 through which the release rod 3 is inserted and held, and a radius of the release rod 3 which comes into contact with the inner wall of the operation lever 1. Support projections 14a, 14 that regulate movement in the direction
b. And the rod holding cylinder 12
Is constituted by a cylindrical body having a holding hole 12a having a rectangular cross section. The support protrusions 14a and 14b are formed so as to protrude upward from the upper side wall of the rod holding cylinder 12, and the tip portions 16a and 16b are gradually inclined outward. The elastic support member 10 has the distal ends 16a, 16b of the support protrusions 14a, 14b.
It is mounted in a state of being in contact with two corners formed by one side plate and one upper plate.

The release rod 3 is provided with a flat mounting portion 3b for mounting the elastic support member 10, and the flat mounting portion 3b
Through the holding hole 12a of the elastic support member 10,
The elastic support member 10 is mounted on the release rod 3.

According to the elastic support member 10 described above, the movement of the release rod 3 in the radial direction is restricted, so that the interference between the release rod 3 and the inner wall of the operation lever 1 is prevented.

[Problem to be Solved by the Invention] FIGS. 11 and 12 show AA in FIG. 9 respectively.
A cross section and a BB cross section are shown.

First, in FIG. 11, since the release rod 3 has one end supported by the knob 4, the displacement of the release rod 3 is greatest at the bent end portion 3a. However, in the conventional device, since the elastic support member 10 is disposed at the intermediate portion of the release rod 3, the displacement of the release rod 3 cannot be effectively prevented. There is a possibility that interference between the portion 3a and the inner walls 1a, 1a of the operation lever 1 may occur.

In FIG. 12, the bent end portion 3a of the release rod 3 is farthest from the center axis l of the knob 4, so that
The displacement of the release rod 3 is largest at the bent portion 3a. However, in the conventional device, since the elastic support member 10 is disposed on the center axis l of the knob 4, the displacement of the release rod 3 cannot be effectively prevented. Interference between the bent portion 3a and the inner walls 1a of the operation lever 1 may occur.

SUMMARY OF THE INVENTION An object of the present invention is to provide a parking brake operating device that can effectively prevent displacement of a free end of a release rod, thereby preventing interference between the release rod and an inner wall of an operation lever.

Means for Solving the Problems The present invention provides an operating lever for operating a parking brake; a fixed sector rotatably supporting the operating lever and having engaging teeth on an outer periphery; A claw member rotatably supported on the sector and engageable with the sector; an operation knob arranged to be able to protrude and retract from the grip portion of the operation lever; and a claw engaged with the claw member by movement of the operation knob. A release rod for rotating and displacing a member between an engaged position and a disengaged position, wherein the release rod has a free end engaged with the claw member, and the release rod is free. At the end, an elastic support member for preventing interference between the release rod and the inner wall of the operation lever is provided, and the elastic support member is provided with a bent portion at a free end of the release rod. A first annular portion and second annular portion to be inserted into and fixed to the first portion and second portion to formed, characterized by comprising a deformable connecting portion connecting these two annular portions, the.

[Operation] In the present invention, an elastic support member is provided at the free end of the release rod, and the elastic support member prevents the free end of the release rod from being displaced. Interference is prevented.

That is, the first portion and the second portion that constitute the bent portion of the free end of the release rod are inserted through the first annular portion and the second annular portion of the elastic support member, respectively.
These annular portions function as cushioning members, so that direct contact between the release rod and the side plate forming the operation lever is avoided. Further, by extending the contact piece of the elastic support member until reaching the portion where the side plate of the operation lever is narrowed, the contact piece is inserted between the release rod and the side plate, and the release is performed. The displacement of the rod in the lateral direction (swinging direction) can be prevented.

The elastic support member has the first annular portion and the second annular portion inserted and fixed respectively in the first portion and the second portion which form the bent portion of the free end of the release rod, whereby the elastic support member is fixed to the release rod. It will be provided at the free end. When the elastic support member is provided at the free end of the release rod, the deformable connecting portion connecting the two annular portions is bent so that the first and second bent portions of the release rod free end are bent. It can be easily inserted into two parts.

Hereinafter, the present invention will be described in detail with reference to the illustrated embodiments.

In Figure 1 a first embodiment, the sector 20 has engaging teeth 20a on the fan-shaped outer periphery to the center position as O _1, is fixed to the vehicle body 22.

The sector 20, about an axis of rotation 24 disposed in the center O _1, rotatable operating lever 30 is provided. The operating lever 30, the brake actuation cable 32 is connected to the right end of the center O _1, by pulling the cable 32 by the rotation in the arrow direction of the operating lever 30, without the parking brake body (shown ) Is activated.

Further, the left end of the center O ₁ of the operating lever 30, whose ends have a horizontally extending formed shape inclined obliquely upward, are formed on the inner tubular its horizontal ends The grip 34 is fitted into and supported by the horizontal cylindrical portion 30a.

A pushable operation knob 36 is disposed at the end of the grip 34 so as to be able to protrude and retract, and is formed on the rear surface of the operation knob 36 and an intermediate portion of the horizontal cylinder 30a of the operation lever 30. A coil spring 40, which is an example of an urging member, is arranged between the stopper 30b and the stopper 30b.

The operation knob 36 is formed of, for example, a resin, and connects one end of a release rod 50 to the inside of the operation knob 36.

On a free end side of the release rod 50, a pole 60 which is an example of a claw member interlocked with the movement of the release rod 50 is provided.
Is provided.

The pawl 60 is formed so that the arm lengths between the rotation fulcrum and the action point are different, and is rotatably supported around a rotation shaft 62 provided on the operation lever 30.

The pawl 60 has an overall shape substantially in the shape of a square, and one end of the pawl 60 has an engaging tooth 20a of the sector 20.
And a claw 64 that engages with it. The other end of the pole 60 is formed in a substantially “U” shape so as to have two engagement protrusions 66 and 68 having different lengths. In addition, the first engagement protrusion
66 is formed shorter than the second engagement projection 68.

The free end of the release rod 50 is formed to be bent in a substantially “U” shape, and has a suitable degree of freedom between the first and second engagement protrusions 66 and 68 at the other end of the pole 60. Has been inserted. Then, the distal end 52 of the free end of the release rod 50
Abuts on the first engagement protrusion 66, and the bent portion 54 at the free end of the release rod 50 abuts on the second engagement protrusion 68.

The pawl 60 is rotatable in the counterclockwise direction by moving the release rod 50 to the left side in the figure by the engagement between the first engagement protrusion 66 and the distal end 52 of the release rod 50. On the other hand, the second engagement protrusion 68 and the bent portion 54 of the release rod 50 can be engaged, and the release rod 50 is moved rightward in the drawing by this engagement, so that the pawl 60 is moved clockwise. It is freely rotatable.

 Next, the operation of the entire apparatus will be described.

The coil spring 40 presses and biases the operation knob 36 so as to always protrude from the grip 34, and presses and biases the operation knob 36 to push the pawl 60 through the release rod 50 to engage the engaging teeth of the sector 20. It will act to urge 20a into engagement.

Here, when it is desired to operate the parking brake, the operating lever 30 is rotated around the rotation shaft 24 from the state shown in FIG. By engaging with the cable 20a, the cable 32 can be maintained in a tensioned state, and the parking brake can be maintained in the operating state.

To release the operation of the parking brake, when the operation knob 36 is pressed against the urging force of the coil spring 40, the release rod 50 moves to the right, and the bent portion 54 at the free end of the release rod 50 Is engaged with the second engagement projection 68 and is pushed. Then Paul 60
Rotates clockwise around the rotation axis 62, and engages the pawl 64 with the engagement tooth 20.
Since the engagement state of the two can be released from the position a, the operation lever 30 can be returned to the initial position (the state shown in FIG. 1) by operating the grip 34, and the operation state of the brake can be released.

Next, as shown in FIGS. 1 and 2, an elastic support member 80 is provided at the free end of the release rod 50, and the elastic support member 80 allows the displacement (vibration and vibration) of the free end of the release rod 50. Rolling) is prevented, and thereby interference between the release rod 50 and the inner wall of the operation lever 30 is prevented. Hereinafter, this elastic support member will be described with reference to FIGS.
80 will be described. FIG. 2 shows an elastic support member.
The state where 80 is provided at the free end of the release rod 50 is shown,
FIGS. 3 and 4 show a plan view and a front view of the elastic support member 80, respectively.

The elastic support member 80 includes a first annular portion 82 and a second annular portion 84.
A connecting portion 86 connecting the two annular portions 82 and 84;
And a pair of contact pieces 88a and 88b extending below the annular portion 84.

As shown in FIG. 3, the first annular portion 82 and the second annular portion 84 have an annular shape having a hole having an inside diameter substantially equal to the shaft diameter of the release rod 50.

As shown in FIG. 4, the connecting portion 86 has a smaller thickness than the two annular portions 82 and 84 and has appropriate flexibility. Is configured to be capable of bending deformation.

The second annular portion 84 is formed with a pair of opposed contact pieces 88a and 88b extending downward in the axial direction.
8a and 88b allow the elastic support member 80 to be mounted more stably.

On the other hand, the bent portion C at the free end of the release rod 50
As shown in the drawing, the first and second portions 56 and 58 are formed of a first annular portion 82 and a second annular portion of the elastic support member 80. The parts 84 are respectively inserted and fixed.

An elastic support member is provided at the bent portion C of the release rod 50.
When providing 80, use the thin connecting portion 86 to
Bend 86 and connect both annular parts 82 and 84 to the tip 5 of the release rod 50
2 to move the first annular portion 82 and the second annular portion 84 to the first portion 56 and the second portion 5 of the bent portion C, respectively.
Insert and fix to 8. As described above, since the connecting portion 86 is formed to be thin, the first annular portion 82 is easily bent with respect to the second annular portion 84, so that the elastic support member 80 can be easily attached.

According to the above configuration, the first annular portion 82 and the second annular portion 84 are inserted through the first portion 56 and the second portion 58 forming the bent portion C of the release rod 50, respectively. , 84 will function as cushioning material,
Direct contact between the release rod 50 and the side plate forming the operation lever 30 is avoided, and an unpleasant hitting sound is not generated.

Second Embodiment FIGS. 5 to 8 show a second embodiment of the present invention.
The figure shows a state in which the elastic support member 80 is provided at the free end of the release rod 50, and FIG. 6 shows a state viewed from the direction A in FIG. 5 (the pole 60 is not shown). 7 and 8 show a plan view and a front view of the elastic support member 80, respectively. The same members as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof will be omitted.

In this embodiment, as shown in FIGS. 5 and 7, the inner diameter d1 of the hole 82a of the first annular portion 82 is
Is slightly larger than the shaft diameter d0 of the second annular portion 84.
The inner diameter d2 of a is set substantially equal to the shaft diameter d0 of the release rod 50. Therefore, when the first annular portion 82 moves to the first portion 56 after passing through the bent portion 54 of the release rod 50, the first annular portion 82 uses the large-diameter hole 82a to move the bent portion 54. The elastic support member 80 can be easily passed, and therefore, the elastic support member 80 can be attached more easily than in the first embodiment.

The contact pieces 88C and 88d extending below the lower end of the second annular portion 84 are formed longer than in the first embodiment, as shown in FIGS. 6 and 8, and specifically, The lower part of the side plates 32, 34 of the operation lever 30 is extended to a position where the distance between the two can be made smaller than that of the upper part so as to be able to contact the constricted parts 32a, 34a. The inner surfaces a, a of the contact pieces 88c, 88d are arranged on the release rod 50, and the outer surfaces b, b of the contact pieces 88c, 88d are arranged in contact with or close to the constricted portions 32a, 34a of the operation lever 30. You. As described above, since the contact pieces 88c and 88d of the elastic support member 80 are inserted between the free end of the release rod 50 and the constricted portions 32a and 34a of the side plates 32 and 34, the release rod 50 Can be more reliably prevented from displacing in the lateral direction (swinging direction).

Although the preferred embodiment of the present invention has been described above, the present invention is not limited to the above-described embodiment, and various modifications can be made within the scope of the present invention. For example, the shape of the first annular portion, the second annular portion, the connecting portion, the contact piece or the like constituting the elastic support member can be appropriately changed.

[Effects of the Invention] As described above, according to the present invention, since the elastic support member is provided at the free end of the release rod, displacement (vibration and roll) of the free end of the release rod is prevented. Thus, interference between the release rod and the inner wall of the operation lever is prevented. Therefore, the generation of mechanical noise such as a hitting sound due to the vibration or the roll of the release rod is prevented, and the quality of the parking brake can be improved.

[Brief description of the drawings]

1 to 4 are views showing a first embodiment of the present invention. FIG. 1 is a schematic explanatory view of a parking brake operating device to which the present invention is applied, and FIG. FIGS. 3 and 4 are front and plan views, respectively, of the elastic support member, showing the state provided at the free end of the release rod. FIGS. 5 to 8 are second embodiment of the present invention. FIG. 5 is an explanatory view showing a state in which an elastic supporting member is provided at a free end of a release rod. FIG. 6 shows a state viewed from a direction A in FIG. 5 (a pole is not shown). FIGS. 7 and 8 are a plan view and a front view, respectively, of an elastic support member. FIG. 9 is a schematic explanatory view showing an example of a conventional parking brake operating device. FIG. FIGS. 11 and 12 are external perspective views showing a state in which the support member is provided on the release rod. FIG. 10 is a sectional view taken along the line AA and a sectional view taken along the line BB of FIG. 9, respectively. 20 ... sector, 20a ... engaging teeth, 30 ... operating lever, 36
…… Operation knob, 40 …… Coil spring, 50 …… Release rod, 52…
... Tip portion, 54... Bent portion, 56... First portion, 58... Second portion, 60... Pole, 80... Elastic support member, 82. Parts, 88a, 88b, 88c, 88d ... contact pieces.

Claims (3)

(57) [Scope of request for utility model registration] An operating lever for operating a parking brake; a fixed sector rotatably supporting the operating lever and having engaging teeth on an outer periphery; rotatably supported by the operating lever; A claw member engageable with the sector; an operation knob arranged to be able to protrude and retract from the grip portion of the operation lever; and a movement of the operation knob engages with the claw member to disengage the claw member from the engagement position. A release rod that is pivotally displaced to a mating position, wherein the release rod has a free end engaged with the claw member, and a free end of the release rod, An elastic support member for preventing interference with an inner wall of the operation lever is provided, and the elastic support member includes a first portion and a second portion which form a bent portion of a free end of a release rod. Each insert a first annular portion and second annular portion to be fixed, the parking brake operating apparatus characterized by comprising: a deformable connecting portion connecting these two annular portions, to. 2. The device according to claim 1, wherein a pair of contact pieces extend downward from the second annular portion, and the contact pieces are arranged between a release rod and a side plate forming an operation lever. Parking brake operating device. 3. The method according to claim 1, wherein the inner diameter of the hole of the first annular portion is formed slightly larger than the shaft diameter of the release rod, and the inner diameter of the hole of the second annular portion is equal to the diameter of the release rod. A parking brake operating device that is formed to be about the same as the shaft diameter.