KR19980036931A - Brake pad wear detector - Google Patents

Abstract

The present invention relates to a brake pad wear detector for informing a replacement time due to wear of a brake pad of a disc brake, wherein the brake pad wear detector generates a sufficient friction sound and is formed to have elasticity and has a central portion of the disk. It is formed convexly toward the plate, and both ends are fixed to one side of the inner surface of the opposing pad support plate with the disc plate therebetween, and when the brake pad is worn to the wear limit of the brake pad, the center of the wear detector is the outer peripheral surface of the disc plate. It is characterized by informing the driver of the replacement time of the brake pad by generating a friction sound in contact with.

Description

Brake pad wear detector

1 is a cross-sectional view showing the attachment structure of a conventional brake pad wear detector.

Figure 2A is a cross-sectional view showing the attachment structure of the brake pad wear detector according to the present invention, the brake pad is not worn to the wear limit.

2B is a cross-sectional view showing the attachment structure of the brake pad wear sensor according to the present invention, in which the brake pad is worn to the wear limit.

* Description of the symbols for the main parts of the drawings *

1, 11a, 11b: pad support plates 2, 12: brake pads

5, 15: brake pad wear detector 16: disc plate

[Technical Field of Invention]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a brake pad wear detector for informing replacement timing due to wear of a brake pad of a disc brake, and more particularly to a brake pad wear detector that generates a sufficient friction sound.

[Prior art]

Braking device is an important device used to maintain a parking state while decelerating or stopping a driving car. In such a braking device, frictional force is used to convert the kinetic energy of the car into thermal energy and release thermal energy into the atmosphere to brake the vehicle. Friction brakes that act are commonly used.

Such a braking device includes an operating mechanism for increasing a driver's operating force using a link or hydraulic pressure and transmitting the same to a main body, and a main body generating a braking force in response to a force transmitted from the operating mechanism.

In addition, the brake system includes a main brake mainly used for driving and a parking brake used for parking a car. The main brake is called a foot brake because the driver's foot is operated by the driver's foot, and the parking brake is usually operated by hand. It is called. The operating mechanism of the brake device is a mechanical type using a rod or a wire, and a hydraulic type using a hydraulic pressure. In general, the foot brake is hydraulic and the parking brake uses a mechanical type.

The brake main body receives the hydraulic pressure from the master cylinder of the operating mechanism to generate a braking force, and is divided into a drum brake and a disk brake in structure. The disc brake brakes the wheel by causing the brake pads provided on both sides of the disc plate to be squeezed to the disc plate which is rotated together with the wheel by hydraulic pressure.

On the other hand, the brake pads are abraded by friction with the disc plate, and if worn over a certain limit, the braking force on the disc plate is reduced, and the risk of an accident due to a decrease in the braking force is caused. Therefore, when the brake pads are worn over the wear limit, it is desirable to replace them with new ones for the brake pads in order to prevent accidents caused by such a decrease in braking force.

Therefore, in a conventional disc brake system, a brake pad wear detector is provided for notifying the timing of replacement of the brake pad due to the wear of the brake pad.

In FIG. 1, the attachment structure to the pad support plate of a conventional brake pad wear detector is shown.

As shown in FIG. 1, the brake pad wear detector 5 is fixed to the protrusion 4 protruding from the rear side of the pad support plate 1, and the front side of the brake pad wear detector 5 is along the side of the pad support plate 1. , The other end protrudes to the wear limit of the brake pad 2. Therefore, when the brake pad 2 wears to the wear limit 3, the brake pad wear detector 5 and the disc plate come into contact with each other to generate a friction sound, thereby informing the driver of the timing of replacement of the brake pad 2.

[Technical problem to be achieved]

However, the conventional brake pad wear detector as described above is installed on the outside of the pad support, and the side end friction with the brake pad is not fixed, so even if the side end is bent by an external force and does not contact or come into contact with the disc plate. There was a problem that the friction sound generated by the friction is not enough to be fully recognized by the driver.

Accordingly, it is an object of the present invention to provide a brake pad wear detector, in which both ends are fixed to the inner surface of the pad support plate so as to generate a sufficient friction sound, which contacts the side of the disk plate when the brake pad is worn.

[Configuration and Function of Invention]

In order to achieve the above object, the brake pad wear detector according to the present invention is formed to have an elasticity, the center portion is formed convexly toward the disk plate, the opposite ends of the pad support plate with the disk plate in between When the brake pad is worn to the wear limit of the brake pad, the center portion of the wear detector contacts the outer circumferential surface of the disk plater to generate a friction sound, thereby informing the driver of the replacement time of the brake pad.

EXAMPLE

Hereinafter, a preferred embodiment of the present invention will be described in detail with reference to the drawings.

2 shows the attachment structure to the pad support plate of the brake pad wear detector according to the invention.

As shown in Figs. 2A and 2B, the brake pad wear detector 15 according to the present invention is formed to have elasticity, the center portion is formed convexly toward the disc plate 16, and both ends of the disc It is fixed to one side of the inner surface of the pad support plates 11a and 11b facing each other with the plate 16 therebetween.

The operation of the brake pad wear detector 15 according to the present invention as described above will be described.

When the brake pad 12 has not worn out to the wear limit 13, as shown in FIG. 2A, the brake pad wear detector 15 even if the brake is actuated so that the brake pad 12 contacts the disk plate 16. FIG. The central portion of) does not contact the disk plate 16. However, when the brake pad 12 wears to the wear limit 13, as shown in FIG. 2B, when the brake is actuated and the brake pad 12 contacts the disk plate 16, the pad support plate 11a. The distance between the diaphragm 11b becomes narrow and the brake pad wear detector 15 contracts. Therefore, the brake pad wear detector 15 causes the driver to inform the driver of the replacement time of the brake pad 12 by causing the center portion of the brake pad wear detector 15 to contact the outer circumferential surface of the disc plate 26 due to elasticity to generate a friction sound. do.

[Effects of the Invention]

According to the present invention as described above, the central portion of the brake pad wear detector having both ends fixed to the outer peripheral surface of the disk plate by the elasticity can be reliably generated to generate a sufficient friction sound, so that the driver can be more sure of the timing of replacing the brake pad The effect can be recognized easily.

Claims (1)

In the brake pad wear detector of the disc brake, it is formed to have elasticity, the center portion is formed convexly toward the disc plate, and both ends are fixed to one side of the inner surface of the opposing pad support plate with the disc plate therebetween, The brake pad wear detector, wherein when the brake pad is worn to the wear limit of the brake pad, the center portion of the wear detector contacts the outer circumferential surface of the disc plate to generate a friction sound, thereby informing the driver of the replacement time of the brake pad.