JPS5939100Y2 - master cylinder device - Google Patents

Description

[Detailed Description of the Invention] The present invention mainly relates to a mask cylinder device that is attached to a vehicle body frame of a motorcycle or the like.

In this type of device, a small diameter cylinder hole and a large diameter cylinder hole provided in the front and back of the cylinder body are communicated with each other through a communication passage in a hydraulic chamber at the front of each, and a small diameter piston in these cylinder holes and a large diameter screw I.・It is known that the device is connected integrally with a rod via a rod, but the mounting method is difficult to attach to the vehicle body frame where the width of the vehicle is limited, such as a motorcycle. .

The purpose of the present invention is to obtain a device free of such inconveniences, and the purpose of the present invention is to connect a small-diameter cylinder hole 2 and a large-diameter cylinder hole 6, which are provided in the front and back of the cylinder body 1, to each other through a communication path 8. In a mask cylinder device in which the small diameter piston 3 and the large diameter piston 7 in the cylinder holes 2 and 6 are connected together via a rod 13, the cylinder body 1 is connected to the front fork. The small diameter end is fixed to the other vehicle body frame 19 so that the large diameter side does not overlap the vehicle body frame 19, and one end of the rod 13 is connected to the capper member 18 held between the brake discs 17. Features.

The cylinder body 1 is prepared by separating the reserve tank 4, and its interior communicates with a hydraulic chamber 5 through a primary port 10, and the chamber 5 is provided with a pressure oil outlet 11 at the front thereof.

The piston 3 is provided with a cup rubber (not shown) on its front surface, and is configured to move forward against a spring (also not shown) on its front surface when a pressing force is applied to the bushing rod 13 extending rearward.

In the drawing, 15 is a seal ring on the outer periphery of the large diameter piston 7;
Reference numeral 6 indicates a circlip that prevents the piston 7 from moving backward.

Caliper member 1 that cooperates with brake disc 17 at the tail end of bushing rod 13 extending behind the cylinder body
8 and the front fork or other vehicle body frame 19 in front of it at the front small-diameter end, so that the member 18 is attached to the root shaft 20 as the disc 17 rotates.
When leaning forward using the axis as an axis, it is pushed by this and operates.

In this case, the resulting pressure oil is transferred to the caliper member 23 which cooperates with the brake disc 22 on the other side via the fluid hose 21.
Furthermore, the above-mentioned member 18 is connected to a separate mask cylinder (not shown) via a brake hose 24, through which pressure oil is introduced.

To explain its operation, when the caliper member 18 that cooperates with the brake disc 17 tilts forward about the shaft 20, a forward pressing force is applied to the bushing rod 13, and the piston 3 moves forward and closes the primary port 10. Pressure oil is generated in the hydraulic chamber 5 from the closed position, but at this time, the large-diameter piston 7 behind it is also moved forward at the same time, and pressure oil is also generated in the hydraulic chamber 9 in front of it. It is taken out to the front from inside the hydraulic chamber 5 in front of the hydraulic chamber 5 through the communication passage, and thus the supply amount is significantly increased and it is taken out to the front.

In this way, according to the present invention, the cylinder body 1 having the small diameter cylinder hole 2 and the large diameter cylinder hole 6 is arranged at the end of the small diameter side so that the large diameter side does not overlap the front fork or other body frame 19. Since the cylinder body 1 is fixed to the vehicle body frame 19, for example, even when the cylinder body 1 is disposed inside the front fork, it can be easily disposed in the space between the front fork and the wheel. The degree of freedom is improved, and even when the cylinder body 1 is disposed outside the front fork, it is arranged so that protrusion in the vehicle width direction is suppressed as much as possible, and each cylinder hole 2, 6
A rod 13 that connects the inner pistons 3 and 7 together has one end connected to a caliper member 18 that is held between brake discs 17, so even a small amount of advancement of the caliper member 18 causes a relatively large amount of pressure to be applied. This has the effect of increasing the amount of oil supplied by obtaining oil.

[Brief explanation of drawings]

FIG. 1 is a partially cutaway perspective view of the device of the present invention. 1... Cylinder body, 2... Small diameter cylinder hole, 3... Small diameter piston, 5...
Hydraulic chamber, 6... Large diameter cylinder hole, 7...
・Large diameter piston, 8...Communication passage, 9...
・Hydraulic chamber, 13...Lot, 17...
Brake disc, 18... Caliper member, 1
9...Car body frame.

Claims (1)

[Scope of utility model registration request] A small-diameter cylinder hole 2 and a large-diameter cylinder hole 6 provided in front and rear of the cylinder body 1 are communicated with each other through a communication passage 8 through hydraulic chambers 5 and 9 at the front of each, and these cylinder holes 2,
The small diameter piston 3 and the large diameter piston 7 in the rod 13
In the mask cylinder device which is integrally connected via A mask cylinder device characterized in that one end of a rod 13 is connected to a caliper member 18 held between a brake disc 17.