JPH0314468Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a mounting structure for a vehicle master cylinder that supplies pressurized fluid to a brake device or a clutch device.

[Conventional technology]

For example, as shown in Japanese Utility Model Application Publication No. 59-129690, in a motorcycle, a master cylinder that supplies pressurized fluid to the brake device of the rear wheel is actuated by the brake pedal, and the pressure fluid discharge port of the master cylinder and the brake device are operated by the brake pedal. are connected with a brake hose.

[Problem that the invention attempts to solve]

However, in the case of the above-mentioned structure, since the pressure fluid discharge port of the master cylinder is exposed, there is a risk that the connection fitting to the brake hose may become loose due to flying stones or the like while the vehicle is running, and the hydraulic fluid may leak.

Therefore, an object of the present invention is to provide a master cylinder mounting structure that protects the pressure fluid discharge port of the master cylinder.

[Means for solving problems]

In order to achieve the above object, the present invention has the purpose of fitting the pressure fluid discharge port side end of the master cylinder that supplies pressure fluid to the actuator into the end of the pipe material that constitutes the vehicle body frame, and also connecting other parts of the master cylinder. It is characterized in that it is fixed to the vehicle body frame and that the pressure fluid discharge port of the master cylinder and the pressure fluid supply pipe to the actuator are connected within the pipe material.

〔Example〕

Hereinafter, one embodiment of the present invention will be described based on the drawings.

A swing arm 3 supporting a rear wheel 2 is supported on the main frame 1 of the motorcycle so as to be able to swing up and down, and a bracket 4 provided on the swing arm 3
A caliper 7 of a disc brake device 6 is attached to the rear wheel 2 to perform a braking action by pinching a disc 5 that rotates together with the rear wheel 2.

In addition, the main frame 1 has a seat rail 8
and a pipe-shaped seat rail support stay 9 that supports the intermediate portion of the seat rail 8. A master cylinder 10 is connected to the lower end of the seat rail support stay 9 and rotates to the main frame 1. Pressure fluid is supplied to a cylinder formed in the carrier 7 of the disc brake device 6 by actuation of a brake pedal 11 that is provided.

Note that 12 is a reservoir that stores the working fluid of the master cylinder 10, and 13 is a hose that connects the reservoir 12 and the master cylinder 10.

The master cylinder 10 has a brake pedal 11 attached to a cylinder 15 formed in a cylinder body 14.
A piston 17, which is pushed through a push rod 16 by the rotation of the cylinder body 14, is movably inserted into the cylinder body 14 at the end 14a of the cylinder body 14 on the side of the pressure fluid discharge port 18.
is fitted into the seat rail support stay 9, and is supported by screwing a bracket 14b provided on the cylinder body 14 onto the main frame 1.

A flare pipe 19 communicating with the pressure fluid outlet 18 is connected to the end 14a of the cylinder body 14 of the master cylinder 10 fitted into the seat rail support stay 9, and a flare pipe 19 is connected to the tip of the flare pipe 19. A brake hose 21 is connected via a joint 20, and the brake hose 21
is the through hole 2 formed in the seat rail support stay 9
2 to the outside, and a disc brake device 6
It is connected to the caliper 7 of.

With this configuration, the pressure fluid discharge port 17 of the master cylinder 10 and the brake hose 21 are connected within the seat rail support stay 9, so the connecting portion is not exposed to the outside and is protected against flying stones etc. while driving. No loosening occurs and leakage of hydraulic fluid can be prevented.

[Effect of idea]

As described above, the present invention involves fitting the end of the pressure fluid outlet side of the master cylinder that supplies pressure fluid to the actuator into the end of the pipe material that constitutes the vehicle body frame, and connecting other parts of the master cylinder to the vehicle body. Since the master cylinder is fixed to the frame and the pressure fluid discharge port of the master cylinder and the pressure fluid supply piping to the actuator are connected within the pipe material, the master cylinder is firmly attached and fixed, and the pressure fluid discharge port of the master cylinder is The connection between the vehicle and the pressure fluid supply pipe is covered by the vehicle body frame and is protected from external forces such as flying stones while the vehicle is running, so the connection does not loosen due to external force and leakage of the hydraulic fluid can be prevented.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, in which Fig. 1 is a front view showing a mounting structure for a rear brake master cylinder of a motorcycle, and Fig. 2 is an enlarged sectional view of the main parts. DESCRIPTION OF SYMBOLS 1... Main frame, 2... Rear wheel, 6... Disc brake device, 7... Caliper, 9... Seat rail support stay, 10... Master cylinder, 11... Brake pedal, 14... Cylinder body, 14a... Discharge port side end of cylinder body, 17... Piston, 18... Pressure liquid discharge port, 1
9...Flare pipe, 20...Flare pipe joint, 21...Brake hose

Claims (1)

[Scope of utility model registration request] The pressure fluid outlet side end of a master cylinder that supplies pressure fluid to actuators such as brake devices and clutch devices is fitted into the end of the pipe material that constitutes the vehicle body frame, and other parts of the master cylinder are inserted into the vehicle body frame. A mounting structure for a master cylinder for a vehicle, characterized in that the master cylinder is fixed to the pipe material, and a pressure fluid discharge port of the master cylinder and a pressure fluid supply pipe to an actuator are connected within the pipe material.