JPH0810060Y2 - Parking brake operating device - Google Patents

Description

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

[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 rotationally displaced between an engaged position and a disengaged position by a release rod that can reciprocate in conjunction with the movement of an operation knob that is constantly biased by a spring. ing.

By the way, as a technique for minimizing the vertical displacement of the release rod due to the rotation of the claw member, the connection between the claw member and the release rod is not based on pin connection, but two engagement portions are provided on the claw member. The free end of the release rod is brought into contact with these two engagement portions so that the claw member can be rotated in both directions.

FIG. 5 shows an example of a parking brake operating device of this type.

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.
b ′ are formed. Also, the release rod 3
In the above, the tip bending portion 3a is arranged between the engaging portions 2b and 2b 'of the claw member 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 apparatus having the above-described structure, the tip bending portion 3a of the release rod 3 biased by the spring 5 comes into contact with the first engaging portion 2b of the claw member 2B, so that the claw member 2B is moved to the sector 2A. It can be urged to rotate in the direction in which it engages with the tooth 2a. Further, when the knob 4 is pushed in, the tip bending portion 3a of the release rod 3 comes into contact with the second engaging portion 2b of the pawl member 2B, so that the pawl member 2B is rotated in the direction of separating from the tooth 2a of the sector 2A. Can be biased.

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.

As shown in FIG. 6, the elastic support member 10 abuts against the inner wall of the operation lever 1 and the rod holding cylinder portion 12 through which the release rod 3 is inserted and held, and restricts the movement of the release rod 3 in the radial direction. It is composed of supporting protrusions 14a and 14b. The rod holding cylinder portion 12 is composed of a cylinder body having a holding hole 12a having a rectangular cross section. Further, the support protrusions 14a, 14b project upward from the upper side wall portion constituting the rod holding cylinder portion 12, and further, the tip end portions 16a,
16b is formed so as to be gradually inclined outward. Then, the elastic supporting member 10 has its supporting protrusions 14a, 14
The tip ends 16a, 16b of the b are mounted in a state of abutting on the two corners formed by the two side plates and the one upper plate of the operating lever 1, respectively.

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.

[Problems to be Solved by the Invention] FIGS. 7 and 8 show VII-VII of FIG. 5, respectively.
Section, VIII-VIII section is shown.

First, in FIG. 7, since one end of the release rod 3 is supported by the knob 4, the amount of displacement of the release rod 3 becomes large at the tip bent 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.

Further, in FIG. 8, since the tip bending portion 3a of the release rod 3 is farthest from the central axis line l of the knob 4,
The displacement of the release rod 3 becomes the largest at the tip 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 Problem] The present invention provides an operating lever for operating a parking brake; a fixed sector that rotatably supports the operating lever and has locking teeth on its outer circumference; A claw member that is rotatably supported by the claw member and is engageable with the sector; an operation knob that is arranged to be retractable in a grip portion of an operation lever; In a parking brake operating device including: a release rod that is rotationally displaced to a combined position; a free end of the release rod engages with the pawl member, and a free end of the release rod is connected to the release rod. An elastic support member for preventing interference with the inner wall of the operation lever is provided, and the elastic support member includes a first portion and a first portion that constitutes a bent portion of the free end of the release rod. Respectively fitted and fixed to the second portion,
A first receiving portion and a second receiving portion that are inserted and fixed are provided, and the first receiving portion has a notch formed in a part thereof from an inner peripheral surface to an outer peripheral surface.

[Operation] In the present invention, the free end of the release rod is provided with the elastic support member, and the elastic support member prevents the free end of the release rod from being displaced, and thus the inner wall of the release rod and the operation lever. Interference with is prevented.

In addition, the elastic support member has its first receiving portion and second receiving portion fitted and fixed and inserted and fixed to the first portion and the second portion, respectively, which form the bent portion of the free end of the release rod. A support member will be provided at the free end of the release rod. Then, when the elastic support member is provided at the free end of the release rod, first, the second receiving portion is inserted and fixed in the second portion of the free end of the release rod, and further,
The first receiving portion is pushed and expanded by utilizing the notch formed in the first receiving portion, so that the first receiving portion is fitted and fixed to the first portion of the release rod free end, whereby the elastic support member is fixed. The release rod can be easily attached to the free end.

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

In FIG. 1, the sector 20 has fan-shaped outer peripheral engaging teeth 20a whose center position is O _1, and 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. A brake actuation cable 32 is connected to one end on the right side of the center O ₁ of the operation lever 30, and the parking brake main body (not shown) is pulled by pulling the cable 32 by rotating the operation lever 30 in the arrow direction. ) 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 the free end side of the release rod 50, a pole 60 which is an example of a pawl member that interlocks with the movement of the release rod 50.
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
Comes into contact with the first engaging projection 66, and the bent portion 54 at the free end of the release rod 50 comes into contact with the second engaging projection 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, whereby 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 project from the grip 34, and by biasing the operation knob 36 to project, the pole 60 is engaged with the engagement tooth of the sector 20 via the release rod 50. It will act to urge the engagement with 20a.

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.

Further, when releasing the operation of the parking brake, when the operation knob 36 is pushed against the urging force of the coil spring 40, the release rod 50 moves to the right side, and the bent portion 54 at the free end thereof moves to the pole 60. The second engaging projection 68 is engaged and pushed. Then, the pawl 60 rotates clockwise around the rotation axis 62, and the pawl 64 is engaged with the engaging tooth 20a.
Since the engagement state between the two is released, the operation lever 30 is 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, in FIG. 1, an elastic support member 80 is provided at the free end of the release rod 50, and the elastic support member 80 causes displacement (vibration or rolling) of the free end of the release rod 50.
This prevents interference between the release rod 50 and the inner wall of the operating lever 30. Below, 2nd, 3rd, 4th, 4th
The elastic support member 80 will be described with reference to FIGS. 2 shows a state in which the elastic support member 80 is provided at the free end of the release rod 50, and FIG. 3 shows
The state seen from the direction III-III in FIG. 2 is shown, and
The drawings show the front and perspective views of the elastic support member, respectively, and FIG. 4C shows a state in which the cutout portion of the first receiving portion of the elastic support member is expanded by the first portion of the release rod free end. It is shown.

The elastic supporting member 80 includes a first receiving portion 82 and a second receiving portion 84, and the first receiving portion 82 has a cutout portion 90 formed in a part thereof from an inner peripheral surface 86 to an outer peripheral surface 88. ing. The first
The receiving portion 82 has supporting protrusions 92, 92 formed to project upward and outward from the upper side wall of the receiving portion 82, and the tip portions 92a, 92a of the supporting protrusions 92, 92 contact the inner wall of the operating lever 30. It is configured to touch.

On the other hand, the bent portion 54 at the free end of the release rod 50 is
It is composed of a portion 94 and a second portion 96, and the first receiving portion 82 and the second receiving portion 8 of the elastic supporting member 80 are formed in the first portion 94 and the second portion 96.
4 are fitted and fixed, and inserted and fixed, respectively.

The elastic support member 80 is attached to the free end of the release rod 50.
When installing the first receiving portion 84, the second receiving portion 84
By inserting from the free end 52 of the 50, moving to the second portion 96, and further expanding the first receiving portion 82 using the notch 90 formed in the first receiving portion 82 (first (See FIG. 4C), the first receiving portion 82 is fitted to the first portion 94. As a result, the first receiving portion 82 is fitted and fixed to the first portion 94, and the second receiving portion 84 is inserted and fixed to the second portion 96. Therefore, the elastic support member 80 can be easily attached.

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 and the like of the first receiving portion, the second receiving portion, or the connecting portion forming the elastic support member can be appropriately changed.

[Advantage 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 or rolling) of the free end of the release rod is prevented, which prevents interference between the release rod and the inner wall of the operating lever. 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 drawings]

FIG. 1 is a schematic explanatory view of an embodiment of a parking brake operating device to which the present invention is applied, FIG. 2 is a view showing a state where an elastic supporting member is provided at a free end of a release rod, and FIG. FIG. 4 is a view showing a state viewed from the direction III-III in FIG. 2, FIGS. 4A and 4B are respectively a front view and an external perspective view of the elastic supporting member, and FIG. 4C is a first receiving portion of the elastic supporting member. FIG. 5 is a view showing a state in which the cutout portion is expanded by the first portion of the free end of the release rod, FIG. 5 is an external view explanatory diagram showing an example of a conventional parking brake operating device, and FIG. 6 is a conventional elastic support member. FIG. 7 is an external perspective view showing a state where the release rod is provided on the release rod, and FIGS. 7 and 8 are VII-VII sectional views and VIII of FIG. 5, respectively.
It is -VIII sectional drawing. 20 ... Sector, 20a ... Engaging tooth, 30 ... Operating lever, 36 ... Operating knob, 40 ... Coil spring, 50 ... Release rod, 52
... tip part, 54 ... bent part, 60 ... pole, 80 ... elastic support member, 82 ... first receiving part, 84 ... second receiving part, 90 ... notch part, 94
… First part, 96… second part.

Claims (1)

[Scope of utility model registration request] 1. An operating lever for operating a parking brake; a fixed sector rotatably supporting the operating lever and having locking teeth on its outer circumference; rotatably supported by the operating lever, A claw member that can be engaged with the sector; an operation knob that is arranged so as to be retractable in a grip portion of the operation lever; a movement of the operation knob causes the claw member to be rotationally displaced between an engagement position and a non-engagement position. In a parking brake operating device including a release rod, the free end of the release rod engages the pawl member, and the free end of the release rod interferes with the release rod and the inner wall of the operating lever. An elastic support member for preventing the above is provided, and the elastic support member is fitted and fixed to each of the first portion and the second portion forming the bent portion of the free end of the release rod. A parking brake operation, comprising: a first receiving portion and a second receiving portion that are inserted and fixed, and the first receiving portion has a notch formed in a part thereof from an inner peripheral surface to an outer peripheral surface. apparatus.