KR19980058606A - Wear condition detection device of pad - Google Patents

Abstract

Anyone can know exactly when to replace the brake pads.The through-holes are formed in the back plate toward the adhesive surface with the pad, and the grooves and through-holes are formed in a predetermined depth on the adhesive surface of the pad and are arranged in the same line as the through-holes. A sensor body having a first electrode fixedly installed and installed on one side, the operating member having a second electrode that is supported in the groove through the through hole and spaced apart from the first electrode by a predetermined distance, and is installed in the back plate and the pad is more than a predetermined level. The invention relates to an apparatus for detecting a wear state of a pad including a resilient member which pulls the operation member toward a groove when worn, thereby causing the second electrode to contact the first electrode.

Description

Wear condition detection device of pad

The present invention relates to an apparatus for detecting a wear state of a pad, and more particularly, to an apparatus for detecting a wear state of a pad, which detects whether a brake pad worn by brake operation is worn over a certain level so that an operator can know when to replace the brake pad. will be.

In general, a vehicle is equipped with a brake. There are many types of brakes, but friction brakes are often used. The friction brake is configured in such a manner as to obtain a braking force of the drive shaft by applying a friction force to a disc plate or the like. A caliper brake is typically used as a friction brake. These friction brakes use pads to increase friction with the disc plate.

1 is a view showing the installation state of the conventional pad wear state detection device. 1 shows a back plate 10. The back plate 10 is a part constituting the brake, which is a part relatively moved with respect to the disc plate. The pad 20 is attached to the front of the back plate 10. The pad 20 is in contact with the disk plate to apply friction to the disk plate.

As shown in FIG. 1, a conventional pad wear state detecting device 30 is attached to the back plate 10. The pad wear state detecting device 30 is made of steel with high elasticity and one end thereof is fixed to the back of the back plate 10 by a rivet 32, and the other side is bent in a predetermined shape to form the back plate 10. It protrudes forward. The protrusion degree may be determined in consideration of the wear limit of the pad 20.

In FIG. 1, the pad 20 contacts the disk plate and wears. When the pad 20 wears out by a brake, the pad 20 is in contact with the disk plate. Accordingly, the pad wear state detecting device 30 is vibrated, so that the driver can hear the vibration sound and know the replacement time of the pad 20.

In a vehicle equipped with a conventional pad wear state detecting device as described above, the replacement timing of the brake pad should be determined only by the driver's hearing. In this case, when the vehicle noise is severe, it is easy to miss the replacement timing of the brake pad 20 when the driver's hearing falls, which may cause a large accident.

It is an object of the present invention to provide a pad wear state detection device that allows anyone to know exactly when to replace the brake pads.

1 is a view showing the installation state of the conventional pad wear state detection device,

2 is a cross-sectional view showing a pad wear state detecting apparatus according to the present invention,

3 is a plan view of the second degree clip,

4 is a cross-sectional view showing a state in which the second electrode and the first electrode are in contact by the operation of the second actuating member.

* Explanation of symbols for the main parts of the drawings

110: back plate, 112: through hole, 120: pad, 122, 132, 142: groove, 130: sensor body, 134: first electrode, 140: clip, 150: bracket, 160: operating member, 162: second Electrode, 170: elastic member

An object of the present invention, in the wear state detection device of the pad for detecting a state that the brake pad is bonded to one side of the back plate of a predetermined area to increase the friction force worn over a certain amount, the adhesive surface of the pad on the back plate A through hole formed toward the adhesive surface of the pad, a groove formed at a predetermined depth and arranged in the same line as the through hole, a sensor body having a first electrode fixed to the through hole and installed on one side, and supported by the through hole. An operation member having a second electrode spaced apart from the first electrode by a predetermined distance, and an elastic member installed on the back plate and pulling the operation member toward the groove when the pad is worn for a predetermined period so that the second electrode contacts the first electrode. It can be achieved by the wear state detection device of the pad characterized in that it comprises.

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

2 is a cross-sectional view illustrating a pad wear state detecting apparatus according to the present invention, FIG. 3 is a plan view of a clip of FIG. 2, and FIG. It is sectional drawing which showed state.

2 and 4, the back plate 110 is shown. The pad 120 is bonded to the front surface of the back plate 110. As shown, the through plate 112 is formed in the back plate 110 toward the pad 120, and the groove 120 is formed in the pad 120. The groove 122 is formed at a predetermined depth on the adhesive surface side of the pad 120 and is disposed in the same line as the through hole 112. The depth of the groove 122 may be determined in consideration of the wear limit of the pad 120.

The sensor body 130 is fixed to the through hole 112 by the clip 140. The sensor body 130 has a substantially cylindrical shape, and the outer circumferential surface has a groove 132 coupled to the clip 140. The shape of the clip 140 can be seen in FIG. As shown in FIG. 3, the clip 140 should just take the form which formed the long groove | channel 142 in the board of predetermined area. The clip 140 is secured by a bracket 150 having an L-shape facing the back plate 110. The first electrode 134 is installed on the sensor body 130 fixed by the clip 140.

Inside the sensor body 130 is provided with an operating member 160 that passes through the through-hole 112 is supported in the groove 122. The operating member 160 is provided with a second electrode 162 which is spaced apart from the first electrode 134 by a predetermined interval.

An elastic member 170 is installed inside the sensor body 130. The elastic member 170 is for pulling the operating member 160 toward the groove 122 when the pad 120 is worn for a predetermined time or more so that the second electrode 162 contacts the first electrode 134. It does not have to be installed inside the sensor body 130, but may be installed at a necessary position of the back plate 110 so that the elastic member 170 exerts a force toward the groove 122 on the operating member 160.

As shown in FIG. 4, when the pad 120 is worn to the groove 122 by the brake operation, the elastic member 170 moves the operation member 160 toward the groove 122. Accordingly, the second electrode 162 is in contact with the first electrode 134, the predetermined power supply circuit is turned on (on). When the power circuit is connected to the vehicle dashboard to operate a warning light or to generate an alarm sound, the driver can know when to replace the pad 120.

As can be seen from the above description, anyone using the pad wear condition detection device according to the present invention can easily determine the replacement time of the pad. Accordingly, it is possible to prevent accidents due to bad brake operation due to pad wear. In addition, the wear state detection device of the pad according to the present invention can be reused after replacing the pad is more economical.

Claims (2)

In the pad wear state detection device for detecting a state in which the brake pad is bonded to one side of the back plate of a predetermined area to increase the friction force worn over a certain amount, A through hole formed in the back plate toward the adhesive surface with the pad; A groove formed at a predetermined depth on an adhesive surface of the pad and disposed in the same line as the through hole; A sensor body fixed to the through hole and having a first electrode installed at one side; An operation member having a second electrode passing through the through hole and supported in the groove and spaced apart from the first electrode by a predetermined distance; And And a resilient member installed on the wall plate and pulling the operation member toward the groove when the pad is worn for a predetermined time, so that the second electrode contacts the first electrode. . The outer peripheral surface of the sensor body is formed with a groove of a predetermined depth, The rear surface of the back plate is coupled to the groove and the clip to hold the sensor body and the wear-shaped detection device of the pad characterized in that it is provided with the letter-shaped bracket installed facing each other to support the clip.