JPS5819888B2 - disc brake device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention primarily relates to a disc brake device for motorcycles and other two-wheeled vehicles.

Conventionally, in this type of device, a caliper body having a caliper cylinder and a pair of left and right pads on both sides of a brake disc that are pushed by pressure oil in the cylinder and actuated toward the closing side of the brake disc is used. There is a known type that is swingably supported on the axis of the wheel and supported on the vehicle body frame via a torque rod, but in this case, the mask cylinder that supplies pressure oil to the caliper cylinder is Generally, it is prepared separately from the main body at a suitable location on the vehicle body frame, and the two are connected to each other with a brake hose, and such a type requires a relatively large space to install the mask cylinder. At the same time, there are disadvantages such as the brake hose and other pressure oil circuits being relatively long.

The object of the present invention is to obtain a device that does not have such inconveniences, and includes a caliper cylinder and a pair of left and right brake discs on both sides of the brake disc that are pushed by the pressure oil in the cylinder and mutually operate toward the closing side. A disc brake device in which a caliper body having a pad is swingably supported on the shaft of a wheel having the disc and the caliper body is supported on a vehicle body frame via a torque rod, A master cylinder connected to the caliper cylinder is provided, and the mask cylinder is connected to the aforementioned torque rod at an internal pressure piston, and the caliper body is connected to a brake lever or other brake operator via a brake wire or the like. The caliper body is tilted as the operator is operated.

An example of implementing the present invention will be explained with reference to the attached drawings.

In the drawings, reference numeral 1 indicates a body frame of a motorcycle, and reference numeral 2 indicates a rear wheel of the motorcycle.A caliper body 4 is swingably supported on a shaft 3 of the wheel 2, and is supported by a torque rod 5 between the body frame 1 and the body frame 1. to support it from the front.

The caliper main body 4 has inside thereof a caliper cylinder 6 and a pair of left and right pads 7.7 which are pushed by the pressure oil in the cylinder 6 and are mutually operated toward the closing side. During the closing operation, the brake disc 7 acts to apply braking to the brake disc 8, which is fixed in advance on the wheel 2, by pressing it from both outside sides.

Although the above is not particularly different from the conventional one, according to the present invention, a mask cylinder 9 for supplying pressure oil into the cylinder 6 is provided in the caliper body 4.

That is, the vehicle body frame 1 has a brake lever, a brake pedal, and other brake operating elements 10 located in front thereof, and in the conventional case, a mask cylinder is provided close to this.
According to the present invention, this is provided within the caliper main body 4, with the operating element 10 isolated.

To explain this in detail, a mask cylinder 9 is provided in the caliper main body 4, and an oil passage 12 is provided in a chamber 11 at the end of the mask cylinder 9.
The oil reservoir 13 is connected to the caliper cylinder 6 on its upper surface, and is connected to the torque rod 5 at a slidable pressure piston 14 inside the caliper cylinder 6, thus connecting the caliper body 40. According to the tilting to the right in the drawing, the piston 14 is aligned with the cylinder 9.
Pressure oil is generated in the chamber 11 at the end by moving relatively forward within the chamber 11,
This was made to be guided into the caliper cylinder 6.

Further, the caliper main body 4 has the above-mentioned brake operator 10.
The main body 4 is connected to the operating element 10 via a brake wire 15 in order to provide a tilting motion in accordance with the operation of the main body 4.

To explain its operation, when the brake operator 10 is operated, the caliper main body 4 is pulled by it via the brake wire 15 and tilted to the right in the drawing, and accordingly the mask cylinder 9 is moved to the right in the drawing. Pressure oil is generated in the internal chamber 11, and this is guided into the carrier cylinder 6 and presses both pads. , 7 are operated toward the closing side, and the wheel 2 is braked, but according to this operation, the caliper main body 4 engages with the wheel 2 via the pad 7.7. As a result, the mask cylinder 9 acts as a torque cylinder during braking, and pressure oil corresponding to the torque is generated in the internal chamber 11. For example, the pressure oil mentioned above is automatically increased in pressure,
In this way, the pad 7.1 is pushed by this and the braking force is further increased.

Automatically increasing the braking force is particularly advantageous in reducing the operational load on the brake when applying sudden braking to a large two-wheeled vehicle, for example.

Note that the above-mentioned braking produces a servo effect because the disc moves in the direction of the brake torque, but for this reason, when the rotation of the disc is reversed in the direction of the brake torque, that is,
No servo effect occurs when the wheeled vehicle moves backwards.

However, in the case of a two-wheeled motor vehicle, since its forward movement is not performed using power, it can be used even if a servo effect that increases force s% cannot be obtained.

In this way, according to the present invention, a mask cylinder is provided inside the caliper main body and the pressure oil in the cylinder is guided to the caliper cylinder inside the main body, whereas the conventional mask cylinder is provided separately from the main body. In addition, the cylinder can also act as a torque cylinder to automatically increase the pressure of the pressure oil, and can be applied to large two-wheeled vehicles, for example, to provide a good quick response. It has the effect of providing braking.

[Brief explanation of drawings]

FIG. 1 is a partially cutaway side view of an example of the device of the present invention, FIG. 2 is a partially cutaway front view, and FIG. 3 is a cutaway plan view thereof. 1...Vehicle frame, 2...Wheels, 3...
...Axis, 4...Caliper body, 5...
・Torque rod, 6...Carrier cylinder,
7,7... Band, 8... Brake disc, 9... Master cylinder, 10...
... Brake operator, 14 ... Pressure piston,
15...Brake wire.

Claims (1)

[Claims] 1. A caliper body, which has a caliper cylinder and a pair of left and right pads on both sides of a brake disc, which are pushed by pressure oil in the cylinder and actuated to close each other, is rocked on the axis of the wheel that has the disc. In a disc brake device in which the caliper body is rotatably supported on a vehicle body frame via a torque rod, a master cylinder connected to the caliper cylinder is provided in the caliper body, and the mask cylinder is controlled by internal pressure. The caliper body is connected to the above-mentioned torque rod at the piston, and the caliper body is connected to a brake lever or other brake operating element via a brake wire or the like so that tilting is applied to the caliper body as the operator is operated. Disc brake device consisting of.