JPS625984Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a parking brake device for a motorcycle, in which braking is applied to the engine output shaft by raising the side stand, and the braking is released by flipping up the side stand. It is.

To ensure safe parking of motorcycles on slopes,
In addition, in order to prevent starting with the side stand extended, Jikosho has recently developed a parking brake device that applies and releases braking by raising or flipping up the side stand.
The devices shown in Publication No. 49-46109 and Japanese Utility Model Application Publication No. 54-90862 were developed.

The handbrake for two-wheeled vehicles disclosed in Japanese Utility Model Publication No. 49-46109 has a spring 8 stretched between a frame 7 and a side stand 1 as shown in FIG. , one end of the rotating shaft 3 of the eccentric cam 2 is eccentrically fixed, the other end of the rotating shaft 3 is eccentrically attached to a cam 9 having a pawl 4, and said 4 is locked to the brake pedal 5. So, side stand 1
By standing up, the eccentric cam 2 rotates,
When the rotating shaft 3 rotates, the pawl 4 of the cam 9 hooks the brake pedal 5 and pulls it downward, and as a result, the brake rod 6 pulls the band brake 10 to the left to perform braking, and the side stand 1 is flipped up. As a result, each interlocking mechanism operates in the opposite manner to the above, the brake pedal 5 is restored, and the braking of the band brake 10 is released.

Further, the parking brake device for a motorcycle disclosed in Japanese Utility Model Publication No. 54-90862 includes a brake operating member 13 made of a rod or wire connected to an arm 12 of a rear brake 11 and a side stand 14, as shown in FIG. control cable 1
5, and the brake operating member 13
and the brake pedal 16 are connected by a connector 17 that prevents the brake pedal 16 from being rotated when the side stand 14 is raised, so that the raising operation of the side stand 14 and the rotation operation of the brake pedal 16 interfere with each other. The rear brake 11 is operated via the brake operating member 13 without any
It operates.

By the way, the handbrake for a two-wheeled vehicle shown in FIG.
While the stroke of the brake rod 6, which is pulled by rotating the brake pedal 5 and pulling the brake pedal 5 down, is constant, the stroke of the brake rod 6, which is pulled by directly pushing down the brake pedal 5, increases as the brake is used. Therefore, band brake 1
Since it is difficult to always match the stroke of the brake rod 6 required to operate the brake rod 6 with the stroke of the brake rod 6 required to raise the side stand 1, the side stand 1 may not be able to be raised, or even if the side stand 1 is raised, the brake There is a drawback that the brake 10 cannot be activated.

Furthermore, in the parking brake system for a motorcycle shown in FIG. 2, the raising operation of the side stand 14 and the rotating operation of the brake pedal 16 are designed to prevent interference with each other. Control cable 1 according to
In addition, the connection between the control cable 15 and the brake operating member 13 is a part that operates frequently, so if it is not properly maintained, sufficient braking force may not be obtained, or the side stand There is a defect that 14 cannot be erected or swung.

This invention was devised to solve the problems of conventional parking brake devices, and independently of the rear brake, the engine output shaft is braked by raising the side stand, and the engine output shaft is braked by raising the side stand. It is an object of the present invention to provide a parking brake device for a motorcycle that releases an output shaft.

An embodiment of the parking brake device for a motorcycle according to the present invention will be described below with reference to FIGS. 3 and 4.
A side stand 20 is pivotally supported by a bracket 22 fixed to a frame pipe 21, and a return spring 23 is stretched between the bracket 22 and the middle portion of the side stand 20.
24 is the engine output shaft, and this engine output shaft 2
A brake drum 26 is mounted on the engine sprocket 4 adjacent to the engine sprocket 25 by spline fitting, and is fastened to the engine output shaft 24 with a washer 27 and a nut 28. brake drum 2
A pair of brake shoes 29 are disposed within the brake shoe 6, and two return springs 30 are stretched between the pair of brake shoes 29, and their end surfaces are butted against each other, and a semicircular recess 31 on the upper end surface. A pair of brake shoes 29 are supported by anchor pins 34 cast into the cover 33 at pin holes 32 formed by butting the brake shoes 29 against each other. A cam portion at the tip of a brake cam 35 passing through the cover 33 is disposed between the lower end surfaces of the pair of brake shoes 29, and one end of a brake lever 36 is disposed at the base end of the brake cam 35 outside the cover 33. It is fitted and fixed with a washer 27 and a bolt 38. A brake operating member (rod, cable, etc.) 37 attached to the side stand 20 is connected to the other end of the brake lever 36 by a pin 38. Nao 39
numeral 40 is a rear sprocket that rotates together with the rear wheel, and 40 is a chain mounted on the engine sprocket 25 and the rear sprocket 39.

In the parking brake system for a motorcycle configured as described above, when the side stand 20 is raised by stepping on the foot, the brake operating member 37 is moved to the brake lever 3.
6 and rotates the brake cam 35,
The pair of brake shoes 29 open left and right against the return spring 30 using the anchor pin 34 as a fulcrum, and are brought into close contact with the inner peripheral surface of the brake drum 26 to perform braking. 24 is fixed. Therefore, it is not possible to start the motorcycle with the side stand 20 extended.
I'll never forget the jump. Also, when the car is parked on a slope, the rear wheels are completely fixed, preventing them from moving.

To release the parking brake, flip up the side stand 20 with your foot and press the brake operating member 37.
Since the brake lever 36 is rotated in the opposite direction and the brake cam 35 is rotated in the opposite direction, the pair of brake shoes 29 are closed inwardly using the anchor pin 34 as a fulcrum by the return spring 30, and the inside of the brake drum 26 is rotated. It separates from the surrounding surface and the braking is released.
The engine output shaft 24 becomes rotatable.

The above embodiment is applied to a chain-driven motorcycle, but when applied to a toothed belt-driven motorcycle, the brake drum 26 is equipped with teeth that engage with the toothed belt on the outer circumferential surface of the brake drum 26. It is preferable to attach it to the output shaft 24 and omit the sprocket for the toothed belt.

As can be seen from the above explanation, the parking brake system for a motorcycle according to the present invention applies braking to the engine output shaft when the side stand is raised, and releases the braking when the side stand flips up. You won't have to forget to raise it, and when you park on a slope, the rear wheel will come to a complete stop and won't start moving.

Moreover, the motorcycle parking brake system of the present invention independently applies braking to the engine output shaft and releases the braking, regardless of the rear brake, so it is different from the conventional parking brake device shown in Fig. 1. Unlike motorcycle handbrakes, situations such as the inability to raise the side stand or the inoperation of the band brake when raising the side stand due to a mismatch between the stroke of the brake rod when the side stand is raised and the stroke of the brake rod when the brake pedal is pressed down do not occur. , also the second
Unlike the parking brake device shown in the figure, there is no need to adjust the control cable due to wear of the brake shoe of the rear brake, or to maintain the joint between the control cable and the brake operating member, which is advantageous in terms of maintenance.

[Brief explanation of the drawing]

FIG. 1 is a schematic perspective view of the main parts of a conventional handbrake for a motorcycle, FIG. 2 is a front view of a conventional parking brake device for a motorcycle, and FIG. 3 is a parking brake device for a motorcycle according to the present invention. The front view and FIG. 4 are exploded perspective views of the parking brake device. 20... Side stand, 24... Engine output shaft, 26... Brake drum, 29... Brake shoe, 35... Brake cam, 36... Brake lever, 37... Brake operating member.

Claims (1)

[Scope of utility model registration request] A drum brake is provided on the engine output shaft of a motorcycle, and a brake operating member attached to a side stand is connected to a brake lever attached to a brake cam of the drum brake, and braking is applied to the engine output shaft when the side stand is raised. A parking brake device for a motorcycle, characterized in that it is released by lifting up a side stand.