KR19990015795A - Braking system - Google Patents

Abstract

The present invention relates to a braking apparatus for a vehicle, and to provide a braking apparatus for a vehicle that can park the vehicle using the main brake without separately installing a parking brake. The braking device includes a disc brake and a drum brake for generating a braking force according to the operation of the brake pedal, a master cylinder connected to the brake pedal and converting the stepping force of the brake pedal into hydraulic pressure, and the master cylinder and the brake pipe. And an auxiliary cylinder receiving hydraulic pressure from the master cylinder, a plate installed inside the auxiliary cylinder and pressurizing the brake oil while moving in the front direction by the hydraulic pressure to supply the disc brake and the drum brake, and the auxiliary cylinder. It is installed in the inward direction from the outside of the cylinder and consists of stoppers for fixing the plate to continuously maintain the hydraulic pressure acting in the disc brake and drum brake directions.

Description

Braking system

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a braking device for a vehicle, and more particularly to a braking device for a vehicle that can park a car without using a parking brake.

Typically, a brake device of a vehicle is composed of a main brake mainly used while driving and a parking brake for keeping the vehicle parked. In this case, since the main brake is operated by the driver's foot, the foot brake and the parking brake are generally referred to as hand brakes, and thus are called hand brakes.

The construction and operation of the main brakes and parking brakes used for the above purposes is described in Part III (Chapter) of Chapter 6 (Brass) of the Maintenance Manual of Automobiles, issued on June 28, 1995, by Golden Bell. -16 and Dongshin Publishing Co., published January 25, 1995, are described in detail in pages 251 to 270 of the Structure section of the chassis.

However, the conventional braking device configured as described above requires a separate space for installing the parking brake lever in the vehicle compartment by implementing the braking force by installing the main brake and the parking brake, respectively, thereby narrowing the space next to the driver's seat. In addition, the cost of the brake system has increased. In addition, since the parking brake operates only on the front wheel or the rear wheel 2 wheels, there is a problem that the braking force is unstable on the slope (road of steep slope).

Accordingly, an object of the present invention is to provide a braking apparatus for a vehicle that can park a vehicle using a main brake without separately installing a parking brake.

Another object of the present invention to provide a braking device for a vehicle that can make the most of the space between the driver's seat and the passenger seat.

Still another object of the present invention is to provide a braking device for a vehicle that can realize reliable braking force in a steep slope.

In order to achieve the above object, the present invention provides a braking device for a vehicle having a disc brake and a drum brake that generates a braking force according to the operation of the brake pedal, wherein the brake pedal is connected to the brake pedal and hydraulically presses the stepping force of the brake pedal. A master cylinder for switching, an auxiliary cylinder connected to the master cylinder and a brake pipe, and receiving hydraulic pressure from the master cylinder, and installed inside the auxiliary cylinder and pressurizing the brake oil while moving in the front direction by the hydraulic pressure. A plate for supplying the disc brake and the drum brake, and a stopper which is installed inward from the outer side of the auxiliary cylinder and fixes the plate to continuously maintain the hydraulic pressure acting in the disc brake and drum brake directions. That is configured to be characterized.

1 is a schematic view showing the configuration of a braking device without a parking brake according to an embodiment of the present invention.

Figure 2 is a cross-sectional view showing the configuration of the auxiliary cylinder to perform the function of the parking brake in the braking device of the vehicle according to an embodiment of the present invention.

3 is a cross-sectional view showing an operating state of a brake apparatus without a parking brake according to an exemplary embodiment of the present invention.

Explanation of symbols for main parts of the drawings

14: auxiliary cylinder 13, 16: brake pipe

24: cable 32: sliding lever

34: holder 38: guide part

40: spring 42: stopper

46: round plate

100: disc brake and drum brake direction

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description of the present invention, detailed descriptions of related well-known functions or configurations will be omitted if they may obscure the gist of the present invention.

1 is a schematic view showing the configuration of a braking device without a parking brake according to an embodiment of the present invention. Figure 2 is a cross-sectional view showing the configuration of the auxiliary cylinder for performing the function of the parking brake in the braking device of the vehicle according to an embodiment of the present invention.

As shown in FIG. 1, the brake device of a vehicle according to an exemplary embodiment of the present invention includes a brake pedal 10 installed in a vehicle cabin, a disc brake 18 installed on a front wheel of the vehicle, and a drum brake 20 installed on a rear wheel, respectively. do. In this case, a disc brake may be installed on the rear wheel of the vehicle. The master cylinder 12 is connected to the brake pedal 10 and converts the power generated when the driver steps on the brake pedal 10 to the hydraulic pressure 102a. That is, the master cylinder 12 receives the pedal force of the brake pedal 10 to pressurize the brake oil. At this time, the pressure of the pressurized brake oil is referred to as hydraulic pressure 102a. In addition, the auxiliary cylinder 14 is connected to the master cylinder 12 by the brake pipe 13, and receives the hydraulic pressure 102a from the master cylinder 12 and delivers to each brake 18,20. At this time, the other side of the auxiliary cylinder 14 is connected to the brake 18 and the drum brake 20 by the brake pipe 16 to transfer the hydraulic pressure 102a to the respective brakes 18 and 20.

Figure 2 is a cross-sectional view showing the configuration of the auxiliary cylinder for performing the function of the parking brake in the braking device of the vehicle according to an embodiment of the present invention, the auxiliary cylinder 14 is formed in a cylindrical shape having a hollow space therein, Brake oil 104 is introduced and filled through the inlet opening 70. In addition, a check valve 72 is installed at an oil inlet 70 formed at one side of the auxiliary cylinder 14 to prevent the brake oil 104 from being injected into the auxiliary cylinder 14 and not to flow out.

A circular plate 46 is installed inside the auxiliary cylinder 14. The circular plate 46 presses the brake oil 104 while feeding the hydraulic fluid 102a transmitted from the mast cylinder 12 to the disc brake 18 and the drum brake 20 while sliding in the front direction. At this time, if the hydraulic pressure 102a is not transmitted from the master cylinder 12, that is, the driver does not step on the brake pedal 10, the circular plate 46 is returned to the original position. In addition, the outer surface of the auxiliary cylinder 14, the guide portion 38 formed with guide rails (not shown) on both inner sides are attached to both sides symmetrical with each other. A stopper 42 is installed on the inner side surface of the guide part 38. At this time, both ends of the stopper 42 are coupled to the guide rail of the guide part 38, and the auxiliary cylinder 14 is formed with holes 44 through which the stopper 42 passes. In addition, a spring 40 is provided on the rear side of the stopper 42 to move the stopper 42 inwardly of the auxiliary cylinder 14 with a predetermined elastic force. The stopper 42 secures the circular plate 46 when the vehicle is parked to keep the hydraulic pressure 102b acting on the disc brake 18 and the drum brake 20 continuously. That is, when the spring 40 presses the stopper 42 with a predetermined elastic force and moves inward, the stopper 42 catches and fixes the circular plate 46. Accordingly, the hydraulic pressure 102b acting toward each brake 18 and 20 is continuously maintained. The disc brake 18 and the drum brake 20 generate braking force.

Cables 24 are respectively connected to the rear ends of the stoppers 42, and the cables 24 are supported by holders 34, respectively. At this time, the other side of the cable 24 is connected to the sliding lever 32 installed in the vehicle compartment. In addition, the cable 24 is formed of one strand when connected to the sliding lever 32, but is formed of two strands when leaving the vehicle compartment, and is connected to the respective stoppers 42. The sliding lever 32 is installed in the lever housing 22 in which the guide rail 30 is formed to operate the respective stoppers 42 while slidingly moving forward and backward. At this time, since the lever housing 32 in which the sliding lever 32 is installed is small, it may be installed in the instrument panel or may be installed in the arm rest of the driver's door. In addition, the sliding lever 32 is attached to the locking device is configured not to operate while driving the vehicle. This is a technical configuration that can be predicted by any person, for example, there is a lever configuration of a cut-knife or an adjuster of a seat belt.

Referring to the operation of the vehicle braking device of the present invention configured as described above are as follows.

First, the driver presses the brake pedal 10 when decelerating or stopping the speed of the driving vehicle. The pedal force applied to the brake pedal 10 is then transmitted to the brake oil filled in the master cylinder 12, and pressure is generated in the brake oil. This pressure, ie the hydraulic pressure 102a, is transmitted to the auxiliary cylinder 14 through the brake pipe 13. The hydraulic pressure 102a then pushes the circular plate 46 in the auxiliary cylinder 14 in the forward direction, so that the circular plate 46 presses the brake oil 104 stored in the auxiliary cylinder 14. Thereafter, the hydraulic pressure 102b of the pressurized brake oil is transmitted to the disc brake 18 and the drum brake 20 through the brake pipe 16, and each of the brakes 18 and 20 generates a braking force. As a result, the vehicle is stopped by the braking force of the brakes 18 and 20.

When the vehicle is to be parked as shown in FIG. 3, the driver presses the brake pedal 10. Thereafter, the operation as described above is performed. That is, in the master cylinder 12, the pedal force of the brake pedal 10 is switched to hydraulic pressure 102a, and is transmitted to the auxiliary cylinder 14. Subsequently, the circular plate 46 presses the brake oil 104 while moving in the front direction by the hydraulic pressure 102a. The pressurized brake oil 104 is supplied to each of the disc brakes 18 and the drum brakes 20 through the brake pipes 16. Subsequently, each of the brakes 18 and 20 generates a braking force.

Thereafter, when the driver releases the locking device of the sliding lever 32 installed in the cabin and pushes the front direction, the stoppers 42 installed in the auxiliary cylinder 14 flow inwardly through the holes 44 of the auxiliary cylinder by the elastic force of the spring 40. Then, when the driver releases the foot on the brake pedal 10, the brake pedal 10 returns to the initial position. The pedal force applied to the master cylinder 12 is then removed, and then the hydraulic pressure 102a applied to the auxiliary cylinder 14 is also released. At the same time the circular plate 46 is moved in the rear direction, and then stopped by the stopper 42 as shown in FIG. At this time, since the circular plate 46 is stopped by the stopper 42 without returning to the original position, the hydraulic pressure 102b applied to the disc brake 18 and the drum brake 20 is maintained as it is. As a result, the brakes 18 and 20 continue to generate braking force while the vehicle is parked.

Then, when the driver wants to release the parking state of the vehicle, first press the brake pedal 10 completely to move the circular play 46 by a, and then pull the sliding lever 32 toward the rear. Subsequently, the operation of the sliding lever 32 causes the cable 24 to be pulled in the rearward direction, and at the same time, the stoppers 42 connected to the cable 24 move in the outward direction of the auxiliary cylinder 42. Then, when the sliding lever 32 is locked, the stopper 42 is seated on the guide part 38 so as not to interfere with the front / rear movement of the circular plate 46. As a result, the vehicle is in a state capable of traveling.

As described above, the braking device of the vehicle according to the embodiment of the present invention can reduce the cost of the braking device as well as reduce the cost of the braking device by simply replacing the function of the parking brake by the braking force of the main brake without using a separate parking brake. You can make the most of the space next to you. In addition, since the braking force is simultaneously generated on the front wheel and the rear wheel when the car is parked, there is an effect that can realize a certain braking force even on a steep slope.

Claims (5)

A braking apparatus for a motor vehicle having a disc brake and a drum brake that generates a braking force in accordance with the operation of the brake pedal, A master cylinder connected to the brake pedal and converting the stepping force of the brake pedal into hydraulic pressure; An auxiliary cylinder connected to the master cylinder and a brake pipe and receiving hydraulic pressure from the master cylinder; A plate which is installed inside the auxiliary cylinder and pressurizes brake oil while moving in the front direction by the hydraulic pressure to supply the disc brake and the drum brake; And a stopper installed in an inward direction from the outside of the auxiliary cylinder and configured to stop the plate to continuously maintain hydraulic pressure acting in the disc brake and drum brake directions. The brake device of claim 1, wherein a check valve is attached to the auxiliary cylinder so that the brake oil is not injected to the outside after the brake oil is injected into the auxiliary cylinder. The braking apparatus of claim 1, wherein a guide part for sliding the stoppers forward and backward is attached to an outer surface of the auxiliary cylinder. 4. The braking apparatus of claim 3, wherein a spring for moving the stopper in an inward direction of the auxiliary cylinder is installed on the inner surface of the guide unit. The stopper of claim 1, wherein each cable is installed at one end of the stoppers, and the cable is connected to a sliding lever installed in a vehicle compartment, and the stoppers move forward and backward by the operation of the sliding lever. Braking device for a vehicle, characterized in that the control box.