KR100836357B1 - Car Wedge Brake - Google Patents

Abstract

The present invention relates to a wedge brake for an automobile, and more particularly, to prevent foreign matter such as dust introduced into the brake housing from being transferred into the wedge brake.

According to the present invention, the diaphragm 13 is installed on the inlet 12 and the breathing hole 11 through which the compressed air is introduced, and the pressureless chamber 14 in which pressure is not formed therein, and the compressed air introduced through the inlet 12. A brake housing 10 including a push rod 15 operated in conjunction with an operation of the diaphragm 13 operated by the expander rod, an expander rod 42 connected to an end of the push rod 15, and the expander rod. In the wedge brake for an automobile composed of an expander 40 provided therein the piston 45 is pressed to the left and right when the push rod 15 is operated by the wedge 44 provided in the front end of the 42, the wedge The rubber boot 30 surrounding the outer side of the push rod 15 is installed in the brake housing 10 of the brake, and the air passage 15b is provided on the push rod 15 having the rubber boot 30 installed on the outer side. And the air flow path (15a) is formed to communicate Is achieved by.

Description

Wedge Brake of Vehicle

1 is a cross-sectional view showing a conventional wedge brake.

2 is an enlarged view showing a state in which a chassis bridging hose is coupled to a conventional wedge brake;

3 is a cross-sectional view showing a wedge brake of the present invention.

Figure 4 is an enlarged cross-sectional view showing the main portion of the inventors wedge brake.

5 is a cross-sectional view showing a push rod for the wedge brake of the present invention.

＊ Explanation of symbols for main parts of drawing *

10: brake housing 11: breathing hole

12 inlet port 14 pressureless chamber

15: pushford 15a: air passage

15b: air flow path 30: rubber boot

40: Expander 42: Expander Load

44: wedge

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wedge brake for an automobile, and more particularly, to a wedge brake for an automobile so that foreign substances such as dust and the like introduced into the brake housing are not transferred into the wedge brake.

In general, a vehicle is provided with a braking device to selectively reduce the vehicle speed or stop the vehicle body as needed while driving. The braking device includes a disc brake installed at the front wheel and a drum brake mounted at the rear wheel. Install and use

The disc brake is configured such that a disc-shaped disc rotates with the wheel, and a braking force is generated by rubbing the disc with a brake pad embedded in the caliper. The drum brake rotates the drum together with the wheel. A pair of brake shoes installed therein extends toward the inner surface of the drum and is rubbed to generate a braking force.

1 is a cross-sectional view showing a conventional wedge brake for a vehicle, the brake housing 10 is formed with an inlet (1a) and a breathing hole (1b) for introducing compressed air into the inside, and the brake housing 10 An expander having a push rod (2) operatively installed in the interior thereof, and a piston (3c) operated by a wedge (3b) formed at an end of the expander rod (3a) connected to the push rod (2). It is composed of 3).

On the other hand, the other end of the hollow connecting portion (5a), one end of which is protruded outward is mounted in the breathing hole (1b), the first hose member (5b) is installed in the hollow inside of the connecting member (5a) One end of the pipe member 5c is coupled to one side end of the connection member 5a on which the first hose member 5b is installed, so as to communicate with the first hose member 5b, and the other side of the pipe member 5c. At the end is provided a chassis bridging hose 5 which is coupled to communicate with the second hose member 5d.

The conventional wedge brake for a vehicle configured as described above has a connecting member 5a, a first hose member 5b, a pipe member 5c, and a second hose member in a breathing hole 1b formed in the bridging of the brake housing 10. Chassis bridging hose 5 is installed so that 5d is connected to each other so that the breathing hole 1b formed in the breathing of the brake housing 10 is not directly exposed to the atmosphere, thereby closing the breathing hole 1a. By preventing foreign matters such as dust and moisture contained in the air from being introduced into the brake housing 10, the dust and moisture introduced into the wedge brake are prevented from entering the inside of the wedge brake. It improves the durability of the accessories, stabilizes the braking performance according to the brake operation, and the inspection and replacement cost of the consumer who has to check the condition of the wedge brake periodically And to sense.

However, such a conventional wedge brake for automobiles should couple the chassis breathing hose 5 to the breathing hole 1b formed in the breathing of the brake housing 10, thereby increasing workability and increasing the number of parts when assembling the vehicle. Not only is this deterioration, there is a problem that the exterior appearance of the vehicle is deteriorated by the thickness of the inner and outer diameters of the chassis bridging hose 5.

On the other hand, when the vehicle is being maintained, there is a problem that the mechanic performing maintenance by the chassis breathing hose 5 feels uncomfortable and degrades the maintainability.

The present invention has been made to solve the above problems, the contaminants such as moisture and dust introduced through the breathing hole into the interior of the brake housing does not contaminate the push rod installed in the brake housing and the outside through the breathing hole By discharging to the brake housing, the accessories provided inside the wedge brake are not contaminated even if a separate chassis bridging hose is not coupled to the breathing hole of the brake housing, thereby reducing the number of parts and reducing workability when assembling the vehicle. It is an object of the present invention to provide a wedge brake for a vehicle to improve productivity.

In addition, another object of the present invention is to provide a wedge brake for a vehicle to improve the appearance of the vehicle to improve the merchandise and at the same time the mechanic can easily repair the vehicle when the vehicle is maintained.

The present invention for achieving the above object, the diaphragm is installed on the inlet and the breathing hole in which the compressed air is introduced and the pressure-free chamber inside the pressure is not formed therein, the operation of the diaphragm operated by the compressed air introduced through the inlet A brake housing including a push rod operated in conjunction with the push rod, an expander rod connected to an end of the push rod, and a wedge provided at a distal end portion of the expander rod, pressurizes the piston to the left and right sides when the push rod is operated. In the wedge brake for automobiles comprising an expander provided, a rubber boot that surrounds the outer portion of the push rod is installed in the brake housing of the wedge brake, and an air flow path and an air flow path in the push rod having the rubber boot installed on the outer portion of the wedge brake. Is achieved in communication with each other.

On the other hand, it is preferable that the rubber boot uses a bellows type.

Hereinafter, the technical configuration of the present invention with reference to the accompanying drawings in detail.

Figure 3 is a cross-sectional view showing a wedge brake for a vehicle of the present invention, Figure 4 is an enlarged cross-sectional view showing the main portion of the wedge brake for a vehicle of the present invention, Figure 5 is a cross-sectional view showing a push rod for a wedge brake of the present invention.

In the present invention, the inlet 12 and the breathing hole 11 are formed in the upper and lower portions of the brake housing 10 so that the compressed air flows into the brake housing 10.

The brake housing 10 has a pressureless chamber 14 having no pressure formed therein, and the diaphragm 13 is operable on the pressureless chamber 14.

On the front of the diaphragm 13 is provided a push rod 15 in which an air passage 15b and an air passage 15a are formed in communication with each other so as to operate in conjunction with the operation of the diaphragm 13.

The one end is fixed to the inner surface of the brake housing 10 and the other end is fixed to the front end of the push rod 15 so that the inside of the brake housing 10 is compressed and expanded according to the operating state of the push rod 15. A bellows type rubber boot 30 is installed.

In addition, the expander 40 is operated by the expander rod 42 connected to the end of the push rod 15 and the wedge 44 provided at the tip of the expander rod 42. It is configured to include a piston 45 is pressed to the left and right.

The operation of the wedge brake for a vehicle according to the present invention configured as described above will be described in detail with reference to the accompanying drawings.

3 is a cross-sectional view showing the configuration of the wedge brake for automobiles according to the present invention, when the driver presses a brake pedal (not shown) while driving along a road, the inlet 12 formed in the brake housing 10 is compressed air of high pressure. Is introduced.

The high pressure compressed air introduced through the inlet 12 operates the diaphragm 13 to one side, and the air on the pressureless chamber 14 is operated through the breathing hole 11 by the operation of the diaphragm 13. The bellows type rubber boot 30 is compressed by being discharged to the lower portion of the brake housing 10 through the push rod 15 toward the expander 40.

At this time, the air in the rubber boot 30 flows in the direction of the expander 40 through the air flow passage 15b while flowing through the air flow passage 15a formed in the push rod 15, thereby providing the push rod 15. When operating in the direction of the expander 40, the rubber boot 30 is smoothly compressed without being affected by the air contained therein.

In addition, when the push rod 15 is moved in the direction of the expander 40, the atmosphere is circulated through the breathing hole 11 formed at the bottom of the brake housing 10, so that operation resistance does not occur.

When the rubber boot 30 is compressed as described above and the push rod 15 is operated in the expander 40 direction, the expander rod 42 connected to the push rod 15 is also operated together and the The wedge 44 provided at the front end presses the piston 44 while bringing the brake shoe (not shown) into close contact with the brake lining (not shown), whereby braking is performed.

When the driver steps on the brake pedal (not shown), the expander rod 42 is operated in the opposite direction of the expander 40 by the spring force of the wedge return spring 4 installed on the outer circumferential surface of the expander rod 42. The push rod 15 is also operated by the operation of the expander rod 42 to return the diaphragm 13 to its original position and the rubber boot 30 to expand.

At this time, the air necessary for the expansion of the rubber boot 30 is delivered to the rubber boot 30 through the air flow path 15b and the air flow path 15a formed in the push rod 15 in the expander 40 direction. do.

In addition, when the push rod 15 moves, the air flows through the breathing hole 11 formed in the lower part of the brake housing 10 so that the operating resistance does not occur even when the brake is released.

As described above, the wedge brake for automobiles according to the present invention prevents the ingress of dust and moisture introduced into the wedge brake to improve the durability of the wedge brake and to stabilize the braking performance according to the brake operation. Even when assembling the vehicle, the number of parts and workability are reduced to improve productivity, as well as a very useful invention in which the mechanic can easily repair the vehicle when the vehicle is maintained.

Claims (2)

The diaphragm 13 is installed on the inlet 12 through which the compressed air is introduced, the breathing hole 11, and the pressureless chamber 14 in which pressure is not formed therein, and is operated by the compressed air introduced through the inlet 12. A brake housing 10 including a push rod 15 operated in conjunction with an operation of the diaphragm 13, an expander rod 42 and an expander rod 42 connected to an end of the push rod 15. In the wedge brake for automobiles composed of an expander 40 provided therein the piston 45 is pressed to the left and right when the push rod 15 is operated by the wedge 44 provided at the front end of the brake, the brake of the wedge brake The rubber boot 30 surrounding the outer portion of the push rod 15 is installed in the housing 10, and the air rod 15b and the air flow are provided in the push rod 15 in which the rubber boot 30 is installed at the outer portion. The furnace 15a is formed in communication with each other. Wedge brakes for automobiles. The wedge brake for automobile according to claim 1, wherein the rubber boot (30) is a bellows type.

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