KR19980050524A - Warning device for replacing drum brake lining - Google Patents

Abstract

The present invention relates to a replacement timing warning device for a drum-type brake lining that automatically informs the replacement timing of the lining rubbed with the brake drum. Conventionally, there is no means to check the state of wear of the lining, there was a inconvenience to be checked directly with the naked eye. When the replacement time has elapsed, there is a problem that the brake shoe and drum are damaged. In order to solve this problem, the present invention provides a push terminal 9 supported by a spring 8 to the brake shoe 4 with the lining 3 attached thereto, and connects the brake shoe with the battery power source. The brake drum 2 and the warning lamp 6 are connected to ground to the vehicle body. Therefore, when the push terminal of the brake shoe contacts the brake drum due to the wear of the brake lining, the power supply circuit is established and the warning light is turned on.

Description

Warning device for replacing drum brake lining

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a warning device for replacing a drum type brake lining, and more particularly, to a wear warning device for a brake lining that automatically informs the replacement timing of a lining friction with a brake drum.

As is well known, the braking device of a vehicle is used to maintain a parking state at the same time as decelerating or stopping a driving vehicle, and converts kinetic energy of the vehicle into thermal energy by using frictional force, and releases the heat into the atmosphere to provide braking force. Friction brakes that generate heat are mainly used.

The basic structure of such a braking device is composed of an operation mechanism that increases and transmits the pedal effort of a pedal operated by a driver using a link or hydraulic pressure, and a brake body that receives the force to generate a braking force.

The brake body is generally structured such that a disc brake is installed on the front axle in a passenger car, and a drum brake is mounted on the rear axle.

The drum brake device rotates at high speed together with the wheels and tires, the brake drum supported by the rear spindle via the hub bearing and the cap, the brake shoes selectively frictionally contacted to the brake drums, and the wheels extending the brake shoes. And a back plate supporting the brake shoe and the wheel cylinder and fixed to the rear spindle.

In addition, a lining is attached to the outer surface of the brake shoe, thereby generating a braking force by contacting and friction with the brake drum.

In the above-described drum brake device, since there is no means for checking the wear state of the lining conventionally, the brake shoe and the drum are in direct contact when the lining is completely worn, so that the parts are damaged and the noise is generated.

For example, an indicator is attached to the friction pad of the disc brake system to indicate the replacement time. However, the drum brake device is not provided with a means for informing when to replace the lining.

For this reason, conventionally, in order to check the wear state of the lining, it is inconvenient to remove the wheels and tires and visually check them directly. Therefore, the driver is often left as it is until the abnormality does not occur in the brake, there is a problem that will cause damage to the brake shoe and the drum when the time has elapsed.

In order to solve the problems of the prior art, the present invention automatically detects the wear of the brake lining, and informs the driver of the replacement time, so as to prevent damage to the brake shoe and drum. Provides a warning device for the replacement of a drum type brake lining.

1 is a block diagram showing an exchange time warning device for a drum brake lining according to the present invention.

* Explanation of symbols for the main parts of the drawings

2: brake drum 3: lining

4: brake shoe 6: warning light

7: housing 8: spring

9: Push terminal

As a means for realizing the above object, the present invention is to provide that when the brake lining is worn more than the prescribed, the switching means mounted between the brake shoe and the brake drum is turned on, so that a warning light installed on the instrument panel in the vehicle interior is turned on. It consists of a technical configuration.

More specifically, the brake shoe with the lining is provided with a push terminal carried by the spring. This push terminal is accommodated together with a spring in a housing integrally formed with the brake shoe, and is installed to have a constant height at all times by the elastic force of the spring.

The brake shoe is connected to battery power, and the brake drum is grounded to the vehicle body via a warning light.

Accordingly, the present invention constitutes a power circuit connected to a battery power source, a brake shoe, a push terminal, a brake drum, and a warning light. When the push terminal of the brake shoe contacts the brake drum due to wear of the brake lining, the power supply circuit It is established and it turns on a warning light.

Therefore, the driver can check the wear state of the brake lining and replace the lining, thereby preventing damage to the parts.

EMBODIMENT OF THE INVENTION Hereinafter, preferred embodiment for implementing this invention is demonstrated in detail based on an accompanying drawing.

EXAMPLE

1 is an overall configuration diagram showing a replacement time warning device for a drum-type brake lining according to the present embodiment.

Reference numeral 1 in the drawings refers to the entire drum brake device.

The drum brake device 1 is rotated together with a wheel and has a brake drum 2 installed on the rear spindle, a lining 3 that rubs against the brake drum 2, and two semi-circles to which the lining 3 is attached. It consists of a brake shoe 4 and a wheel cylinder 5 installed at one end to extend the brake shoe.

Therefore, the brake shoe 4 expands when the hydraulic pressure is applied to the wheel cylinder 5, and the braking force is reduced because the lining 3 attached to the surface of the brake shoe 4 rubs against the brake drum 2; Is generated.

Here, when the lining replacement warning device of the lining according to the present embodiment wears more than the prescribed limit, the switching means provided on the brake shoe (4) is automatically turned on in contact with the brake drum (2) And, accordingly, the power supply circuit is established so that the warning light 6 installed on the instrument panel in the vehicle interior is turned on.

More specifically, the battery power is connected to the brake shoe 4 to which the lining 3 is attached, so that a predetermined current is excited. In addition, the housing 7 is integrally provided on the surface of the brake shoe 4, and the push terminal 9 provided by the spring 8 is provided inside the housing 7.

The push terminal 9 is always installed at the maximum height under the force of the spring. In this case, the maximum height of the push terminal 9 corresponds to the wear limit of the lining 3 attached to the surface of the brake shoe 4.

In addition, the housing 7, the spring 8 and the push terminal 9 is formed of a whisper material, and is electrically connected to the battery power source.

On the other hand, the brake drum 2 is electrically connected with the warning copper 6 provided in the instrument panel in the vehicle cabin and the wire harness, and grounded again to the vehicle body. Meanwhile, a buzzer may be used instead of the warning light 6.

Through the above-described configuration, the replacement timing warning device of the lining of the present embodiment includes a power supply circuit connected to the battery power source, the brake shoe 4, the push terminal 9, the brake drum 2, and the warning lamp 6. Will be constructed.

Therefore, the warning device of this embodiment is that when the lining 3 wears out beyond the prescribed limit, the push terminal 9 installed on the brake shoe 4 is in contact with the brake drum 2, so that the power supply circuit is established and the battery The power is applied and the warning light turns on.

Therefore, the driver recognizes and replaces the wear state of the brake lining 3, thereby preventing damage to the parts.

Through the embodiments described above, it can be seen that the replacement time warning device of the drum type brake lining according to the present invention substantially solves the problems of the prior art.

That is, according to the present invention, the driver can automatically recognize the replacement timing of the brake lining.

Therefore, the brake shoes and the drum are prevented from being damaged due to excessive wear of the brake lining.

On the other hand, the present invention is not limited to the above-described specific preferred embodiment, and any person having ordinary skill in the art to which the invention belongs without departing from the gist of the invention claimed in the claims, various modifications Would be possible.

Claims (2)

A drum brake device comprising a brake drum rotated with a wheel, a lining rubbing with the brake drum, and two semicircular brake shoes to which the lining is attached and extended by a wheel cylinder, the drum brake device being connected to the brake shoe. A drum type comprising a power supply, a switching means installed on the surface of the brake shoe at the same height as the wear limit of the lining, and a warning light electrically connected to the brake drum and grounded to the vehicle body. Warning device when replacing brake lining. The method of claim 1, wherein the switching means comprises a housing integrally installed in the brake shoe, a spring received in the interior of the housing, and a push terminal received in the housing and held to a certain height by the spring Warning device for replacing the drum brake lining.