JPS5948187B2 - Two-operation release stick type parking brake - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a stick-type parking brake, and particularly to improvements in its operating section.

This type of parking brake has conventionally been constructed as shown in FIG. 1, for example.

That is, a handle 2 is fixed to one end of a stick-type brake operating rod 1, and a yoke 3 is loosely fitted to the other end.

The yoke 3 is pivotally connected to a parking brake operating lever 5 via a pin 4, and this lever is pivotally supported to a bracket 7 attached to a vehicle body 6 via a pin 8.

Therefore, the yoke 3 is prevented from rotating around the axis by the lever 5, and constitutes a non-rotating member.

The brake operating rod 1 is slidably inserted into a guide cylinder 9, and this guide cylinder is pivotally supported by a bracket with a pin 10.

An engaging pawl 11 is pivotally supported on the pin 10, and this engaging pawl is urged to rotate toward the operating rod 1 by a torsion spring 12 wound around the pin 10.

The yoke 3 has holes 13 (2 holes on the circumference of the yoke 3)
Provide one.

) and a pin "14 protruding from the operating rod 1 so as to pass through these holes, and are connected to the operating rod 1, and a torsion spring 15 is provided between the pin 14 and the lever 5, so that the pin 14 is connected to the hole 13.
The operating rod 1 is held in a rotational position where the engaging claw 1°1 is aligned with the teeth f-6 formed on the outer periphery of the operating rod 1 in the axial direction.

In the stick-type parking brake having such a configuration, the parking brake can be activated via the lever 5 and the cable 11 by holding the handle 22 and pulling the operating rod 1 in the direction of arrow a.

This state continues even if the lever 11 is prevented from returning by engaging with the teeth 16 and the handle 2 is released, and the parking brake can be maintained in the activated state.

To release the parking brake, hold the handle 2 and rotate the operating rod 1 in the direction of the arrow.
The tooth 16 that is engaged with the gourd 1 is removed from the engagement position with the gourd 11.

In this state, the parking brake can be released by pushing the operating rod 1 in the direction opposite to the arrow a.

However, in the stick-type parking brake having such a conventional structure, if a hand, foot, object, etc. collides with the handle 2 and the operating lever rotates, there is a risk that the parking brake will be released against the driver's will. Ta.

Therefore, various stick-type parking brakes have been proposed in the past that solve the above-mentioned drawbacks by improving the operating part of the parking brake so that the parking brake can be released only by a two-step operation of the handle.

"However, the first release operation of this type of parking brake will be the normal parking brake release.

This is different from a release operation, and it was not possible to release the parking brake by performing a normal release operation.

Therefore, the parking brake release operation is complicated by the two-stage operation, and it takes a considerable amount of time to get used to this operation.

In the case of a stick-type parking brake, the driver usually holds the handle and first applies force in the pulling direction of the operating lever, weakening the engagement force of the locking mechanism composed of the wind and teeth to unlock the operating lever. From the viewpoint of releasing the parking brake by making the rotation and then pushing the operating rod into the position, the stick type is used so that the first release operation is performed by the force in the initial pulling direction. If the parking brake is configured as a two-operation release type, the parking brake will be released just by performing the normal release operation, and the above-mentioned deterioration of operability will not occur. In view of what can be done, the present invention aims to provide a two-operation release stick type parking brake that embodies this idea.

The invention will now be described in detail with reference to the illustrated embodiments.

2 and 3 show an example configuration of the present invention, and FIGS. 4 and 5 are explanatory diagrams of its operation. In these figures, the same parts as in FIG. 1 are designated by the same reference numerals. .

In the present invention, the operating rod 1 is hollow, the locking rod 18 is inserted into the hollow, and the locking rod 18 is guided in the axial direction of the operating rod 1 by a collar 19.31 fixed within the operating rod 1.

One end of the lock rod 18° is caulked and connected to a cover 20 fixed to the handle 2, and a decorative outer cover 21 is attached to this cover.

The other end of the lock rod 18 is bent as shown at 22, and this bent end is passed through a notch 23 formed in the operating rod and into a notch 24 formed in the yoke 3.

The notch 24 is opened □ toward the handle 2z, while the notch 23 is opened □ toward the handle 2z. The notches 23 are opened from directions opposite to each other, and both notches are aligned with each other in the normal state (the handle and the operating rod are not operated). The length should extend beyond the diameter of 1゛8.

A handle plate punch is further fixed to the end surface of the operating rod 1 on the handle 2 side by welding 26 or the like, and this handle plate is received in a similarly shaped recess 30 formed in the handle 2.

Thus, the handle 2 is loosely fitted into the operating rod 1 so as to be relatively movable in the axial direction of the operating rod 1, but is connected to the operating rod 1 via the handle plate 25 in the rotational direction.

The recess 3° is closed by the cover 20°, and its depth is adjusted between the recess bottom 21 and the handle plate 2.
5 is the gap α between the lock rod bent end 22 and the yoke 3.
The distance β is determined to be larger than the distance β between the edge 3a and the edge 3a.

The locking rod 18 is further provided with a collar 28 integrally connected thereto, and a conical coil spring 29 is connected between the collar 28 and the collar 19.
to be reduced.

As a result, the rod 18, and therefore the handle 2 connected thereto, are inserted to the left in FIGS. 2 and 3, the cover 20 is brought into contact with the handle plate 25, and the above-mentioned gap α is formed between the handle plate 25 and ( It is made so that it is normally formed between it and the bottom surface 27 of the recess.

The length of the lock rod 18 is determined so that the bent end 22 of the lock rod enters the notch 24 of the yoke 3 in this state.

The operation of the stick-type parking brake of the present invention constructed as described above will now be described.

2 and 3 show the state when the bundle 2 is released from the hand.

From this state, when the bundle 2 is pulled to the right in the figure to operate the parking brake, the bundle 2 and the lock rod 18 are first displaced in the same direction against the spring 29, and the bottom surface 27 of the recess hits the bundle plate 25. (see Figure 4).

Thereafter, the actuating rod 1 is also displaced together with the bundle 2, and the parking brake can be activated in the same manner as described above with reference to FIG.

When the driver releases his hand from the bundle 2, the needle 2 is returned from the state shown in FIG. 4 to the state shown in FIGS. 2 and 3 by the spring 29' together with the lock rod 18.

In this state, even if the bundle 2 is attempted to be rotated in the lock release direction described above in FIG.
(Since the bundle 2 has entered the notch 24 (non-rotatable member) as described above, it cannot rotate.

Therefore, even if a hand, foot, object, etc. collides with the bundle 2 while the parking brake is activated, the bundle 2 will not be rotated, preventing the parking brake from being released against the driver's will. can.

When releasing the parking brake, use the bundle
2 and pull it to the right in the figure from the position shown in Figures 2 and 3, and bundle the bottom of the recess 27 as shown in Figure 4.
Impact rate 25.

During this time, the lock rod 1 is displaced together with the bundle 2 against the spring 29, and the bent end portion 22 of the lock rod is moved from the position shown in FIGS. 2 and 3 to the notch 24 as shown in FIG. The position will be outside of that.

In this state, when the bundle 2 is rotated in the direction in which the teeth 1-6 are disengaged from the melon 1S (see Figure 1), this rotation is transmitted to the operating rod 1 via the noddle plate 25. The parking brake can then be released in the same manner as described above with respect to FIG.

Note that the conical coil spring 29 that biases the lock rod 18 and the nozzle 2 is connected to the bundle 2 and the operating rod 1 as shown in FIG.
You can put it in between.

Since the cane type parking brake of the present invention is constructed as described above, as is clear from the above description of the operation, unless the bundle 2 is pulled by a predetermined amount (α), the parking brake cannot be released by rotating the bundle 2. Therefore, even if a human body or object collides with the bundle 2, the parking brake will not be released against the driver's will and it is safe.

[Moreover, as mentioned above, the operation of once using the bundle 2 has been performed by the driver before releasing the cane-type parking brake, and the cane-type parking brake of the present invention requires two-operation release. The formula and the difficulty do not require any different operation than before, and can be released by the same operation as before, and the operability is not deteriorated in the slightest.

[Brief explanation of drawings]

FIG. 1 is a partially cutaway side view showing a conventional stick-type parking brake operating unit, and FIG. 2 is a partially cutaway side view of a stick-type brake-type brake operating rod of a two-operation release stick-type parking brake according to the present invention. FIG. 3 is a sectional view taken along the line AA in FIG. 2, FIGS. 4 and 5 are explanatory diagrams of the operation of the parking brake of the present invention shown in FIGS. 2 and 3, and FIG. 6 is another embodiment of the present invention. FIG. 4 is a cross-sectional view similar to FIG. 4 showing an example; 1...Brake operating lever, 2...Bundle, 3...
Yoke, 5... Parking brake operating lever, 6...
...Vehicle body, 7...Bracket, 9...Guide tube, 1
1... Engaging claw, 12... Torsion spring, 13... Hole,
14... Pin, 15... Torsion spring, 16... Teeth,
17...K-pull, 18...Lock rod, 19.2
8.31...Color, 20...Cover, 21...
Decorative outer cover, 22... Lock rod bent end, 23.24.
...Notch, 25...Bundle plate, 27...
Recess bottom surface, 29... Conical coil spring, 30... Recess.

Claims (1)

[Scope of Claims] 1. One end of a brake operating rod is relatively rotatably connected to a yoke pivotally connected to the operating end of a brake operating lever, and a handle is provided at the other end of the brake operating lever, and this handle is used to operate the brake. The parking brake is maintained in an activated state by pulling the handle together with the lever in the axial direction to activate the locking mechanism, and the handle is rotated in one direction together with the brake operating lever to release the locking mechanism and then the parking brake is pushed in. In the walking stick type parking brake, the handle is attached to the other end of the brake operating rod so that it can be moved relative to the other end of the brake operating rod by a certain distance only in the axial direction, and a lock rod is installed within the brake operating rod in all axial directions. Transfer. one end of the lock rod is coupled to the handle, the other end of the lock rod is bent to extend in the radial direction of the brake operating rod, and the handle is connected to the brake operating lever. An elastic body is provided to elastically support the movement limit position in the direction of the pushing operation, and the other bent end of the lock rod enters only at the movement limit position to prevent the rotation of the handle and the brake operating rod. A two-operation release stick-type parking brake, characterized in that a notch is formed in the yoke for a two-operation release type parking brake. ”