JPS61127931A - Alarm device for brake pad wear - Google Patents

Abstract

PURPOSE:To find out wear in a brake pad so early enough, by embedding a contact terminal inside a disc pad in advance, while constituting it so as to emit an alarm when this terminal comes into contact with a brake disc. CONSTITUTION:When brake operation is repeatedly carried out, a disc pad 3 is worn away and finally a contact terminal 4 being embedded inside the pad comes into contact with a disc 2, whereby an electric current flows in a conductive circuit 10 inclusive of a battery 14, a fuse box 15, a resistor 16, a lamp, etc., and an alarm device 17 inside a driver seat panel is operated, warning a driver that the disc pad 3 has approximated to tolerance limits. Thus, the contact terminal is embedded inside the disc pad in advance, and this terminal is constituted so as to emit and alarm when this terminal contacts with the brake disc, whereby wear in the brake pad is found out as early as possible.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a brake butt wear warning device for a disc brake.

[Conventional technology]

During periodic inspections required by law, brake release inspections and brake operation inspections and adjustments must be carried out. If there are no abnormalities, the inspection will be completed. If an abnormality is found, repairs or replacement of the bat will be carried out, and the periodic inspection will be completed. Become. Also, if the brakes are operated for several years without regular inspections, etc., the wear of the set may progress, making it difficult to operate the brakes and causing a serious accident.

[Problem that the invention seeks to solve]

As mentioned above, there was no other way to check the wear status of No. 4 tires other than disassembling and inspecting them, so there were cases where wear progressed and serious accidents occurred.

An object of the present invention is to solve the above-mentioned problems and provide a brake pad wear warning device in which a contact conduction sensor detects when the mat has worn beyond a predetermined amount and warns the driver to prevent serious accidents. be.

[Means to solve the problem and their effects] Brake
-JUf: for contact continuity is embedded inside the brake pad. When the disc and the brake release check come into contact, current flows through the communication circuit and the alarm device in the driver's seat panel lights up to warn the driver and prevent a serious accident from occurring. It is designed to prevent this.

〔Example〕

An embodiment of the present invention will be described below with reference to Fig. 1. Fig. 1 shows the structure of a disc brake. 1 is the disc wheel mounting bolt, 2 is the disc, 3 is the disc wheel, 4
is a contact conduction wire, 5 is a disc fitting back metal, 6 is an O-ring, 7 is a foil cylinder, 8 is a piston, 9 is a hydraulic pipe, 1o is a lead wire, 11 is a brake booster,
12 is a master cylinder, 13 is a brake butt, etc. The conduction circuit also includes a battery 14, a fuse box 15, a resistor 16, and an alarm device 17 such as an alarm lamp (LED) or a buzzer.

Next, the operation of the above embodiment will be explained.

When you step on the brake pedal, the force is increased by the lever principle of the pedal, the hydraulic oil is compressed by the mask cylinder 12 and the brake booster, and the hydraulic pressure is simultaneously transmitted to each wheel cylinder via the hydraulic guide 9, and each piston 8 - Hold down the pads 3 and strongly press the disc 2, which rotates together with a wheel (not shown), from both sides with the pads 3, and stop the wheel by the frictional force generated at that time.

If you repeatedly operate the brakes in this way, the disc will
The set 3 gradually wears out, and eventually the contact terminal 4 buried in the set comes into contact with the disk 2, and the battery 1
4. Current flows through the conduction circuit 10 including the fuse box 15, resistor 16, lamp, etc., activates the alarm device 17 in the driver's seat panel, and alerts the driver that the disk set 3 is approaching the allowable limit. Warn.

〔Effect of the invention〕

As mentioned above, the brake/main/toe wear warning device of the present invention has contact terminals buried inside the disc set.
If you use the brakes for a long period of time, the brakes will gradually wear out.
-ry is configured so that when it comes into contact with the brake disc, a current flows through the conductive circuit and issues an alarm, so wear of the brake butt can be detected early and accidents can be prevented.

[Brief explanation of drawings]

FIG. 1 is a structural diagram of an embodiment according to the present invention. 2... (Brake) disc, 3... Disc/gut, 4... Contact terminal, 10, 14, 15, 16° (
17)...Continuity circuit, 17...Alarm device. Figure 1

Claims (1)

[Claims] A brake pad wear warning device comprising a contact terminal buried inside a disc pad of a disc brake, and an alarm device that causes a current to flow through a conductive circuit when the disc and the terminal come into contact to notify an abnormality.