KR19980039286A - Capacity variable device of booster for automobile master cylinder - Google Patents

Abstract

OBJECT OF THE INVENTION The present invention relates to a master white booster for a brake device in which brake shoes having friction members attached to both side surfaces of a disc-shaped disk which rotates integrally with a wheel of a vehicle and an inner surface of a brake drum are compressed to generate a braking force.

The configuration of the present invention bisects the booster 14 for the master cylinder 10 to be screwed to each other, the reaction disk 30 is installed through the first push rod 20 of the rear booster 18 and the second push rod 22 degrees screw of the front booster 16 By tightening and coupling, the rear booster 18 is loosened or tightened at the front booster 16 to vary the capacity.

Description

Capacity variable device of booster for automobile master cylinder

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a master white booster for a brake device, in which a brake shoe having a friction member attached to both sides of a disk-shaped disk which rotates integrally with a wheel of an automobile and an inner surface of a brake drum is pressed to generate a braking force. At the same time, the boosters are screwed together to be coupled to each other, and the second push rod connected to the first push rod is fixed to the bracket mounted in the booster, and the second push rod and the reaction disc are screwed. The present invention relates to a variable capacity device of a booster for an automobile master cylinder that can be tightened and coupled to change the capacity of the booster to improve the braking force of the brake.

BACKGROUND ART In general, a master cylinder for automobiles is a device that converts the stepping force of a brake pedal into hydraulic pressure, and since the brake oil and piston are contained therein, the generated hydraulic pressure is transmitted to the wheel cylinder of the drum brake and the caliper of the disc brake by the brake line.

Then, the piston of the wheel cylinder and the caliper housing is extruded by hydraulic pressure to push the brake shoe to the drum or disk to brake.

In the conventional master cylinder 100, as shown in Fig. 4, a piston is inserted into the tubular interior, an oil tank 120 is installed at the top, and a booster 140 is installed at the rear.

The conventional master cylinder 10 has an excellent function of converting the force into hydraulic pressure according to the stepping on the brake pedal 16, but the booster 140 is formed as a single unit, so that the back force is always constant, so that braking performance cannot be improved.

In more detail, the booster 140 is integrally formed with the front booster 160 and the rear booster 180, and the diameter of the front booster 160 is less than that of the rear booster 180 so that the vacuum generated in the engine cannot be used to the maximum. There was a problem in that the master cylinder 100 is operated with the power.

The present invention has been made in consideration of the above circumstances, and an object thereof is to change the capacity of the booster integrally coupled to the rear of the master cylinder so that the capacity of the booster for the automobile master cylinder can be improved to improve the braking force. To provide a device.

The present invention bisects the booster for the master cylinder to achieve the above object, and is screwed to each other, the reaction rod and the second push rod of the front booster installed through the first push rod of the rear booster is also screwed In combination, by loosening or tightening the rear booster in the front booster, thereby providing a variable capacity device for a booster for an automobile master cylinder.

1 is an exemplary side view of a booster to which the present invention is applied;

2 is a detailed cross-sectional view of part A of FIG. 1;

3 is a detailed cross-sectional view of part B of FIG. 1;

4 is a side view of a conventional booster.

* Explanation of symbols for the main parts of the drawings

10: master cylinder 12: oil tank

14: Booster 16: Front Booster

18: rear booster 20: first push rod

22: second push rod 24: bracket

26,32: female thread portion 28,34: male thread portion

30: Reaction Disc

Next, embodiments of the present invention will be described in detail with reference to the drawings.

1 to 3 illustrate a variable capacity device of a booster for an automobile master cylinder according to the present invention, which has a booster 14 for a master cylinder 10 having an oil tank 12 coupled thereto. Bidirectionally formed into a front booster 16 and a rear booster 18, and the front booster 16 and the rear booster 18 are screwed together so that the second push rod 22 and the reaction disc 30 provided in the center are screwed together. It is.

The rear booster 18 has a smaller diameter than the front booster 16 and a male thread 28 is formed on the circumferential surface of the front end.

The front booster 16 is also integrally formed with the female threaded portion 26 which is screwed in correspondence with the male threaded portion 28 of the rear booster 18 to the inner peripheral surface of the rear end.

The reaction disk 30, which is located at the center of the rear booster 18 and is installed through the first push rod 20 and the second push rod 22 interlocked with each other by the operation of the first push rod 20, are screwed together. The male screw portion 34 is integrally formed on the circumferential surface of the second push rod 22 and the female thread portion 32 is integrally formed on the reaction disk 30.

Therefore, the booster 14 is that the front booster 16 and the rear booster 18 are coupled to each other by screwing the female threaded portion 26 and the male threaded portion 28, respectively, it is also possible to adjust the combined distance. Thus, the capacity in booster 14 varies according to the tightening degree.

In addition, as the front booster 16 and the rear booster 18 are variable, the second push rod 22 is also variable in the reaction disk 18, and the second push rod 22 penetrates the bracket 24 which is inserted from the lower part of the front booster 16 and is firm at the same time. Is fixed.

In other words, in the configuration of the booster 14 for the master cylinder 10 which converts the pedaling force of the brake pedal of the automobile into hydraulic pressure to brake the disc brake and the drum brake, the booster 14 is bisected and screwed together, and the rear booster The reaction disk 30 through which the first push rod 20 of 18 is penetrated and the second push rod 22 of the front booster 16 are also screwed together to loosen or tighten the rear booster 18 in the front booster 16 to vary the capacity.

Next, the effects will be described with reference to FIGS. 1 to 3.

By changing the front booster 16 and rear booster 18 of the booster 14 by screwing, the internal space is maximized to maximize the vacuum generated in the engine.

Therefore, it is possible to improve the engine braking performance and to give the user confidence.

Claims (1)

In constructing a booster for the master cylinder to brake the disc brake and the drum brake by converting the stepping force of the brake pedal of the vehicle into hydraulic pressure, the booster 14 is divided into two and screwed together, the first push of the rear booster 18 Automobile master cylinder characterized in that the capacity is varied by loosening or tightening the rear booster 18 at the front booster 16 by screwing the reaction disk 30 through which the rod 20 is installed and the second push rod 22 of the front booster 16. Capacity variable device for booster.