JPH0637194B2 - Vehicle brake torque stop device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle brake torque stopping device, and more specifically, a vehicle brake torque stopping device in which a drum brake and a disc brake are mounted with a common supporting member for supporting wheels. It relates to the device.

(Prior Art) Conventionally, for example, in a motorcycle, a drum brake and a disc brake may be mounted with a common front fork that is a support member that supports the front wheels.
By the way, when installing a drum brake, the brake plate supporting the brake shoe is inserted into the axle, engages with the torque stop portion integrally provided on the front fork to project inward in the axle direction, and is transmitted from the brake plate. I try to receive the braking torque.

On the other hand, when installing a disc brake on this front fork, the braking disc that rotates together with the front wheel is
It may interfere with the torque stop that protrudes inward in the axle direction from the front fork. Therefore, the braking disc is arranged on the front fork side where the drum brake is not attached, the caliper is attached to the front fork so as to straddle the braking disc, and the front fork receives the braking torque.

(Problems to be Solved by the Invention) As described above, it is difficult to attach the drum brake and the disc brake to the front forks on the same side.
In addition, the disc brakes cannot be attached to the front forks on both sides, which hinders the common use of the front forks, and limits the degree of freedom of the brake attachment position.

The present invention has been made in view of the above circumstances, and provides a brake torque stopping device for a vehicle, which increases the degree of freedom in the mounting positions of the drum brake and the disc brake, and also makes it possible to use a common support member for holding the wheels. Is intended.

(Means for Solving Problems) In order to solve the above problems, the present invention provides a support member for supporting a wheel with a mount portion, and the mount portion mounts a disc brake on a braking surface of a braking disc. It is characterized by a torque stopper that is detachable from the mount portion and that receives a braking torque by engaging the brake plate when the drum brake is mounted.

(Operation) In this invention, when the drum brake is attached to the support member that supports the wheels, the torque stopper is fixed to the mount portion provided on the support member. Then, a brake plate that supports the brake shoe is engaged with this torque stopper, and the braking torque generated by the braking of the brake drum is received by the support member from the brake plate via the torque stopper.

On the other hand, when installing the disc brake on the support member,
The torque stopper is removed and the caliper is attached to the support member, but the mount is in a position not facing the braking surface of the braking disc. Therefore, even when the disc brake is provided on the same side as the drum brake, the braking disc and the mount portion do not interfere with each other.

(Embodiment) An embodiment in which the present invention is applied to a motorcycle will be described in detail below with reference to the accompanying drawings.

In the figure, reference numeral 1 is a head pipe, and a front fork 2 is rotatably supported on the head pipe 1. A handle 3 is provided on the upper end of the front fork 2, and a front wheel 4 is provided on the lower end. This front wheel 4
Is braked by a drum brake 5 supported by the front fork 2, the drum brake 5 is connected to a brake lever (not shown) by a brake cable 6, and is operated by operating the brake lever.

As shown in FIGS. 2 and 3, the drum brake 5 is arranged between the outer tube 7 of one of the front forks 2 and the front wheel 4. The brake plate 8 of the drum brake 5 is inserted into the axle 9, and the brake plate 8 is integrally formed with a boss portion 10 at a position facing the outer tube 7. The boss portion 10 has a substantially U shape and projects toward the outer tube 7. The boss portion 10 has an engagement groove 11 that is long in the radial direction of the brake plate 8.

The engaging groove 11 is open outward in the radial direction, and in this case, the engaging protrusion 13 of the torque stopper 12 is engaged with the groove 11. The torque stopper 12 has arm portions 14 and 15 at both ends, and the arm portions 14 and 15 are mounted on the mount portions 16 and 17 formed on the outer tube 7 to form the outer tube 7.
From the inside and tightened with bolts 18 and 19 from the outside.

The mount portions 16 and 17 are integrally formed so as to project to the rear side of the outer tube 7. This mount 16,
In this embodiment, 17 is also used as a mount portion for supporting a caliper that straddles the braking disc 20 shown by an imaginary line when the disc brake is mounted instead of the drum brake 5.

The mount portions 16 and 17 are provided at positions that do not face the braking surface 21 of the braking disc 20, and the mounting portions 16 and 17 are mounted on the braking disc 2 when mounting the disc brake.
It does not interfere with the zero braking surface 21.

A pair of brake shoes (not shown) is built in the brake plate 8 so as to be able to open, and the brake shoes are pressed against the inner peripheral surface of the brake drum 22 for braking. The expansion of the brake shoe is performed by rotating a pair of cam shafts 23 by respective levers 24, both levers 24 are connected by a rod 25, and one lever 24 is connected to the brake cable 6
Are connected.

4 and 5 show a state in which a disc brake is provided on the front wheel 4.

When the caliper 27 of the disc brake 26 is supported by the mount portions 16 and 17 of the outer tube 7, the torque stopper 12 shown by an imaginary line is removed and the bracket 28 of the disc brake 26 is attached. That is, the bracket 28 is fixed to the mount portions 16 and 17 with the bolt 29, the caliper 27 straddles the braking disc 20 from the outer periphery,
It is supported by the bracket 28. The caliper 27 is movable in the disc axial direction.

A friction pad 30 is built in the caliper 27 and faces the braking surface 21 of the braking disc 20.

In this embodiment, the torque stopper 12 of the drum brake 5 is used.
The mount portions 16 and 17 for mounting are also used as the mount portions that support the bracket 28 of the disc brake 26, but as shown by the phantom lines in FIGS. 4 and 5, they project inside the outer tube 7. You may provide independently. In this case, since the mount portions 16 and 17 are arranged on the inner peripheral side and the outer peripheral side that do not face the braking surface 21 of the braking disc 20, they do not interfere with the braking disc 20.

Next, the operation of this embodiment will be described.

When the front wheel 4 is provided with the drum brake 5, as shown in FIGS. 1 to 3, the front wheel 4 having the brake drum 22 is attached to the axle 9, and the brake plate 8 is not attached to the brake drum 22. The shoe is assembled so as to face the inner peripheral surface of the brake drum 22. And
Engagement groove 1 formed in engaging protrusion 13 of brake plate 8
1 engages with the engaging protrusion 13 of the torque stopper 12 attached to the mounts 16 and 17 of the outer tube 7 to prevent the brake plate 8 from rotating.

Therefore, when traveling, pull the brake cable 6 to pull the lever 24.
When the cam shaft 23 is rotated to open a pair of brake shoes (not shown) and the brake drum 22 is pressed against the brakes for braking, the braking torque is transmitted from the brake plate 8 to the torque stopper 12. It is received by the mount portions 16 and 17 of the outer tube 7.

On the other hand, the disc brake 26 is attached to the front fork 2.
When mounting, remove the torque stopper 12 shown by the imaginary line as shown in FIGS.
The bracket 28 of the disc brake 26 is fastened and fixed to bolts 6 and 17 with bolts 29. A caliper 27 including a friction pad 30 is provided on the bracket 28.

As described above, since the torque stopper 12 is removed when the disc brake 26 is attached, the disc brake 26 can be attached to the outer tube 7 of the drum brake 5 on the side where the brake plate 8 is attached.
There are no restrictions on the mounting position.

Further, by attaching or detaching the torque stopper 12 to or from the drum brake 5 and the disc brake 26 on the same front fork 2, the front fork 2 can be easily attached without replacement, and the front fork 2 can be commonly used. Is possible.

Further, when the disc brake 26 is attached, it is possible to use a so-called double disc brake which is attached to both sides of the front wheel 4.

In this embodiment, the front wheel has been described, but the same applies to the rear wheel.

(Effect of the Invention) As described above, according to the present invention, the mount member is provided on the support member for supporting the wheel, and the mount portion is at a position not facing the braking surface of the braking disc when the disc brake is mounted. When mounting the drum brake on the mount part, a torque stopper that engages with the brake plate and receives the braking torque is detachably installed, so by mounting and removing the torque stopper, the disc brake and the drum brake can be attached to the front fork. Can be mounted on the same side of the vehicle, and the degree of freedom of the mounting position of the brake can be increased, and the front fork can be shared.

[Brief description of drawings]

FIG. 1 is a side view of a motorcycle equipped with a drum brake, and FIG. 2 is a side view showing a mounted state of the drum brake.
3 is a sectional view taken along the line III-III in FIG. 2, FIG. 4 is a side view showing a mounted state of the disc brake, and FIG. 5 is a IV- in FIG.
It is an IV sectional view. 2 ... Front fork, 4 ... Front wheel 5 ... Drum brake, 7 ... Outer tube 8 ... Brake plate, 9 ... Axle 10 ... Boss part, 11 ... Engagement groove 16, 17 ... Mount part 20 ... Braking disc, 21 ... Braking surface 22 ... Brake drum, 26 ... Disc brake 27 ... Caliper, 28 ... Bracket

Claims (1)

[Claims] 1. A vehicle in which a drum brake and a disc brake for braking a wheel are mounted with a support member for supporting a wheel in common, a mount portion is provided on the support member, and the mount portion is provided when the disc brake is mounted. At a position that does not face the braking surface of the braking disc, and when installing the drum brake on this mount part,
A brake torque stop device for a vehicle, which is detachably provided with a torque stopper that engages with a brake plate and receives a braking torque.