KR19980039302A - Protective device of master cylinder for automobile - Google Patents

Abstract

DISCLOSURE OF THE INVENTION An object of the present invention relates to a protection device for a master cylinder for a brake device, in which brake shoes having a friction member attached to both side surfaces of a disk-shaped disc rotor that rotates integrally with a vehicle wheel and an inner surface of a brake drum are compressed to generate a braking force. will be.

In the configuration of the present invention, the elastic member 104 having the same shape with the disc shaped projector 103 interposed between the first push rod 101 and the second push rod 102 of the master cylinder 10. ) And a cylindrical coupling member 105 having a concentric circle to the outside thereof, and a cushioning member 100 is installed at a lower portion thereof, the front portion of which is fixed to the outlet side, and the rear portion of which is in front of the booster 14. The first and second push rods 101 and 102 are damaged due to the breakage of the elastic member 104 while preventing the master cylinder 10 from being separated by the shock absorbing member 100 when the front collision accident of the vehicle is fixedly coupled. To prevent that.

Description

Protective device of master cylinder for automobile

The present invention relates to a protection device for a master cylinder for a brake device, in which brake shoes having friction members are attached to both sides of a disk-shaped disc rotor that rotates integrally with a wheel of a vehicle and an inner surface of a brake drum are pressed to generate a braking force. In particular, the shock absorbing member is coupled to the lower end of the master cylinder, and the piston of the master cylinder engages the elastic member between the first push rod and the second push rod to operate, so that the front vehicle body is pushed by an impact during a frontal collision of the vehicle. The cushioning member prevents the master cylinder from being separated from the booster, and the elastic member inserted and coupled between the push rods is broken to prevent breakage of the push rod and thus damage to the inside of the master cylinder. A protective device for a master cylinder for an automobile.

Generally, a brake device of a vehicle is a device for reducing or stopping the speed of a driving vehicle and preventing the vehicle in motion from moving by itself, and should provide sufficient braking action for the maximum speed and the weight of the vehicle. It must also be reliable and durable, reliable in operation and not fatigued to the operator.

1 illustrates a general brake system diagram, in which a disk brake 18 is applied to a front wheel of a vehicle and a drum brake 20 is applied to a rear wheel.

The disc brake 18 generates a braking force by pressing from both sides with a brake shoe with a friction lining attached to a disk-shaped disc rotor that rotates integrally with the wheel. The brake shoe that strongly presses the disc rotor is a piston in the caliper housing. The main part of the disc brake, which holds the brake shoes and pistons, is called a caliper.

The drum brake 20 generates a braking force by squeezing a brake shoe attached with a friction material to the rotating brake drum integrally with the wheel from the inside, and extending the brake shoe to press the inside of the brake drum as a small wheel cylinder. This wheel cylinder is moved by hydraulic pressure. These drum brakes are weaker in heat than disc brakes, but drum brakes are better in terms of braking force.

The disc brake 18 and the drum brake 20 are generally referred to as hydraulic brakes, and use the principle of Pascal. The action of the disc brakes 18 and drum brakes 20 is three to five times the force applied by stepping on the brake pedal 16. The hydraulic pressure is generated by pressing the master cylinder 10 (including the brake fluid tank 12 and the booster 14) by force. Secondly, the hydraulic pressure generated in the master cylinder 10 is transmitted to the caliper or the wheel cylinder through the brake line. Thirdly, the delivered hydraulic pressure presses the pistons in the caliper or wheel cylinder and the pistons press each brake shoe onto the disc rotor or drum to generate braking force.

The master cylinder 10 is a device for converting the stepping force of the brake pedal 16 to the hydraulic pressure, the brake oil and the piston is contained therein, the generated hydraulic pressure is the wheel cylinder of the drum brake 20 and the disc brake ( It is delivered in the caliper of 18). 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 10, as shown in Fig. 4, a piston is inserted into the tubular interior, a brake fluid tank 12 is installed at the top, and a booster 14 is installed at the rear.

The conventional master cylinder 10 is excellent in the function of converting the force to the hydraulic pressure by pressing the brake pedal 16, but the first connected to the brake pedal 16 by the vehicle body or impact that is pushed in the front collision of the vehicle. Structural defects such as damage to the push rod 101 and the second push rod 102 that operates the piston of the master cylinder 10 or the first push rod 101 to damage the interior of the master cylinder 10. There was a problem causing it.

The present invention has been made in consideration of the above circumstances, and an object thereof is to provide an elastic member between a first push rod and a second push rod for coupling a shock absorbing member to a lower end of a master cylinder, and the piston of the master cylinder operates. When the front vehicle body is pushed by the impact in the event of a frontal collision of the vehicle, the shock absorbing member prevents the master cylinder from being released from the booster, and the elastic member inserted between the push rods is broken to break the push rod. And to provide a protection device for a master cylinder for automobiles to prevent damage to the master cylinder accordingly.

The present invention combines an elastic member having the same shape between the first push rod and the second push rod of the master cylinder between the first push rod and the second push rod of the master cylinder, and has a concentric circle. Coupled to the cylindrical coupling member having a, and the cushioning member is installed on the lower portion, the front portion is fixed to the outlet side and the rear portion is fixed to the front of the booster to the master cylinder is separated by the shock absorbing member in the event of a front collision of the car It is achieved by providing a protective device for an automobile master cylinder which prevents damage and at the same time prevents the first and second push rods from being broken by breaking of the elastic member.

1 is a schematic diagram of a brake of a typical vehicle;

Figure 2 is an exemplary side view of the master cylinder according to the present invention,

3 is a detailed cross-sectional view of FIG.

4 is a side view of a conventional master cylinder.

* Explanation of symbols for main parts of the drawings

10: master cylinder 12: brake fluid tank

14: booster 16: brake pedal

18: disc brake 20: drum brake

100 buffer member 101 first push rod

102: second push rod 103: the decker

104: elastic member 105: coupling member

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

2 and 3, there is shown a protection device for a master cylinder for a vehicle according to the present invention. The protection device for the vehicle master cylinder includes a shock absorbing member 100 for supporting a lower end of the master cylinder 10, and a first device. And an elastic member 104 coupled between the second push rods 101 and 102 and a coupling member 105 enclosing the elastic member 104.

The shock absorbing member 100 is formed of a material having excellent elasticity and is formed in a flat plate having a band shape, and includes a vertical portion in which the front portion and the rear portion are respectively upward.

The shock absorbing member 100 is coupled to the front part by interviewing the exit side of the master cylinder 10, the rear part is interviewed with the front surface of the booster 14 is fixedly coupled.

The buffer member 100 is provided with an inclined portion downward from the front and at the same time bent again to have an inclined portion toward the rear portion, and the bent portion has a curved portion.

The elastic members 104 have the same disc shape as the end faces of the first and second push rods 101 and 102, and are provided in pairs and are formed of a material having excellent elasticity.

The elastic member 104 is coupled to both sides with the prodator 103 having the same shape interposed therebetween, and the prodator 103 is formed of plastic as the main material.

The first and second push rods 101 and 102, and the elastic member 104 and the decker 103 have concentric circles and are sequentially coupled side by side.

An outer circumferential surface to which the elastic member 104 is coupled is coupled to a coupling member 105 having a through hole having a concentric circle therein.

In other words, in the master cylinder 10 which converts the stepping force of the brake pedal 16 into hydraulic pressure to brake the disc brake 18 and the drum brake 20, the first push rod of the master cylinder 10. Between the 101 and the second push rod 102 is coupled to the elastic member 104 having the same shape with the disc-shaped prodder 103 interposed therebetween, and a cylindrical coupling having concentric circles to the outside thereof. The member 105 is coupled, and the cushion member 100 is installed at the lower portion, the front part is fixed to the outlet side, and the rear part is fixedly coupled to the front of the booster 14 to the shock absorbing member 100 in the event of a front collision of the vehicle. This prevents the master cylinder 10 from being separated and prevents the first and second push rods 101 and 102 from being damaged by the breakage of the elastic member 104.

In the accompanying drawings, the tongue symbol 12 is a brake fluid tank.

Next, the effects will be described with reference to FIGS. 2 and 3.

When the vehicle body is pushed in or the impact is transmitted to the master cylinder 10 during the front collision of the vehicle, the elastic member 104 coupled between the second push rod 102 and the first push rod 101 is shocked. Absorption can be prevented from being suddenly staggered while being staggered while absorbing, and the master cylinder 10 is boosted by the buffer member 100 coupled to the front of the master cylinder 10 and the front of the booster 14. ) To prevent them from escaping.

Therefore, it is possible to prevent the master cylinder 10 from being severely damaged by preventing separation by the shock absorbing member 100 and sudden staggering due to the elastic member 104 during the front collision accident of the automobile.

Claims (1)

In the master cylinder (10) for braking the disc brake (18) and the drum brake (20) by converting the stepping force of the brake pedal (16) into hydraulic pressure, the first push rod (101) of the master cylinder (10). And a cylindrical engaging member 105 having the same shape with the disc-shaped prodder 103 interposed between and the second push rod 102, and having a concentric circle to the outside thereof. ) Is coupled to the buffer member 100 at the lower part, the front part is fixed to the outlet side and the rear part is fixedly coupled to the front of the booster 14 in the front collision of the vehicle by the shock absorbing member 100 by the master cylinder A device for protecting a master cylinder for an automobile, wherein the first and second push rods (101, 102) are prevented from being broken by breaking of the elastic member (104) while preventing the (10) from being detached.