JPH0359292B2 - - Google Patents

Description

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

[Conventional technology]

In disc brakes that obtain braking force by squeezing the disc with a pair of friction pads placed on both sides of the disc, wear of the pad lining is unavoidable. Replacement is recommended.

Therefore, conventionally, a wear indicator is attached to the back plate of the friction pad, and the tip of the wear indicator is protruded a predetermined amount from the interface between the back plate and the pad lining to the pad lining side, and repeated braking causes the pad lining to reach a predetermined amount. A pad wear warning device is provided which, when worn, comes into contact with the disk and emits an alarm sound.

[Problem that the invention seeks to solve]

Such conventional devices notify the degree of wear of the pad by a relatively low-volume alarm sound that is emitted when the tip of the tongue of the wear indicator comes into contact with the disk. This has the disadvantage that it is difficult to distinguish it from sounds other than sounds, such as engine sounds.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a disc brake pad wear warning device that increases the volume of the warning sound, thereby making it easier to distinguish it from other sounds and providing even more reliable notification. .

[Means for solving problems]

In order to solve the above problems, the present invention includes a contact part that comes into contact with the caliper body or pad that moves to the disc surface during braking, and an indicator part that extends from the contact part and faces the rotating surface of the disc. A wear indicator is provided on a splash guard provided on the side surface of the disk, and the tip of the indicator portion faces the rotating surface of the disk.

[Effect]

Therefore, when the pad lining wears down to a predetermined amount, the caliper body or pad pushes the abutting part and the tip of the indicator comes into contact with the disc, producing a contact sound. This is made to resonate with the Tsushiyu Guard to produce a loud alarm sound.

〔Example〕

An embodiment of the present invention will be described based on FIGS. 1 and 2.

The disc 1, which rotates together with the wheel, is supported by a bracket 2 and has a caliper 4 that clamps the disc 1 with friction pads 3 arranged on both sides of the disc 1 for braking action, and a caliper 4 that performs a braking action on the side of the disc 1. A splash guard 5 made of a thin plate is provided to prevent rainwater and mud from adhering.

The wear indicator 6 fixed to the splash guard 5 has a mounting part 6a attached to the splash guard 5 at one end of a plate having spring properties, and a resonance part 6b extending from the mounting part 6a and bent in the disk axial direction. and a back plate abutting part 6c extending from the resonance part 6b and bending between the back plate 7 of the friction pad 3 and the disk 1 along the rotating surface of the disc 1 to abut against the inner surface 7a of the back plate 7; The indicator part 6d extends from the back plate abutting part 6c and is bent in the disk axial direction so that the other end faces the rotating surface of the disc 1. Alternatively, it is fixed with bolts 8 or the like.

Then, the resonance part 6b is inserted between the friction pad 3 and the bracket 2, the back plate contact part 6c is brought into contact with the inner surface 7a of the back plate 7, and the tip of the indicator part 6d is opposed to the rotating surface of the disk 1. When the pad lining 3a is worn down to a predetermined amount, it comes into contact with the rotating surface of the disk 1.

Since the wear indicator 6 is configured and attached to the splash guard 5 as described above, the resonance part 6
Not only is the length of b sufficient, but also the splash guard 5 is formed of a thin plate, so that the contact sound generated when the indicator portion 6d contacts the disk 1 can be resonated to produce a loud alarm sound. can. Furthermore, since the back plate contact portion 6c is in contact with the inner surface 7a of the back plate 7, a force is exerted to separate the friction pad 3 from the disk 1, thereby preventing the friction pad 3 from dragging.

Furthermore, since the splash guards 5 are arranged on both sides of the disk 1, the wear indicators 6
can be installed on either side.

Further, in this embodiment, the wear indicator is provided on the rotation side of the disk, but it may be provided on the rotation side of the disk, or on both the rotation side and the rotation side.

In addition, in the case of a floating type caliper structure, since the reaction force piece comes close to the disc braking surface due to wear of the pad lining, the contact part of the indicator may be pushed by the reaction force piece. .

FIG. 3 shows another embodiment, in which the wear indicator 9 includes a mounting portion 9a, a resonance portion 9b bent from the mounting portion 9a in the disk axial direction, and a resonance portion 9b extending from the resonance portion 9b to the rotating surface of the disk 1. It consists of a back plate abutting part 9c bent in parallel, and an indicator part 9d bent from the back plate abutting part 9c in the disk axial direction so that its tip faces the rotating surface of the disk 1. When the hole 9e is fixed to the splash guard 5 and the pad lining 3a is worn a predetermined amount, the inner surface 7a of the back plate 7 pushes the back plate abutting part 9c and the indicator part 9d comes into contact with the rotating surface of the disk 1. In this way, the same effect as in the embodiment described above can be obtained.

Incidentally, in both of the above embodiments, the wear indicator is separately attached to the splash guard, but the wear indicator may extend from the splash guard and be formed integrally with the splash guard.

(Effects of the Invention) As described above, the present invention provides a wear that has a contact portion that comes into contact with the caliper body or pad that moves to the disk surface during braking, and an indicator portion that extends from the contact portion and faces the rotating surface of the disk. An indicator is provided on the splash guard provided on the side of the disc, and the wear indicator is pushed by the caliper body or pad so that the tip of the wear indicator comes into contact with the rotating surface of the disc when the pad lining wears out a predetermined amount. As a result, the contact sound of the wear indicator can be resonated between the wear indicator and the splash guard to produce a loud alarm sound.

[Brief explanation of drawings]

Figure 1 is a front view of the disc brake with the wear indicator attached to the splash guard, Figure 2
The figure is a sectional view showing one embodiment of the wear indicator, and FIG. 3 is a sectional view showing another embodiment. 1...Disc, 2...Bracket, 3...Friction pad, 4...Caliper, 5...Splash guard, 6
...wear indicator, 6a...attachment part, 6b...resonance part, 6c...back plate contact part, 6d...indicator part, 7...friction pad back plate.

Claims (1)

[Claims] 1 In a disc brake that is equipped with a splash guard on the side of a disc that rotates together with the wheel, and that performs braking by squeezing the disc with a pair of friction pads, the contact that comes into contact with the caliper body or pad that moves against the disc surface during braking. and a wear indicator having an indicator part extending from the corresponding contact part and facing the rotating surface of the disk, the splash guard is provided with a wear indicator, and when the pad lining wears out a predetermined amount, the indicator part comes into contact with the disk. A pad wear warning device for a disc brake, which is characterized by the following: