JPH0612845U - Disc brake - Google Patents

Abstract

(57) [Abstract] [Purpose] A bush with a screw hole is fitted to the caliper mounting foot of the disc brake with a non-rotating structure that is not overloaded, and a fixing bolt is screwed into this bush to maintain the strength of the mounting foot. Mount on a support member without reducing reliability. [Structure] A collar 9 of a bush 7 having a screw hole 8 is shaped to have a flat surface 9a parallel to the outer circumference. On the other hand, the caliper mounting foot is provided with a through hole 5 into which the bush is loosely inserted and a seat groove 6 arranged at the entrance of the hole. The seat groove 6 is formed in a shape corresponding to the collar 9, and the collar 9 is fitted therein. The collar 9 is non-circularly fitted to prevent rotation, and a bolt is screwed into the bush 7.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a disc brake having an improved mounting portion of a caliper mounting foot.

[0002]

[Prior art]

 The disc brake has caliper mounting feet that are mounted on a supporting member such as a knuckle. This caliper mounting foot may be provided on the caliper or on the torque member depending on the type of brake. In any case, this foot is fixed by bolting to a knuckle or the like.

To fix the bolts, screw holes are formed in the caliper mounting feet. If the mounting holes made of casting etc. are directly machined into the screw holes, high strength cannot be obtained and it is difficult to regenerate them when damaged. Therefore, this screw hole is provided in a flanged bush made of steel, etc., and this bush is inserted into the through hole provided in the caliper mounting foot and the bolt is screwed into this bush. There is.

In this case, since the bush cannot be tightened when it is rotated together, a knurled groove is formed on the outer circumference of the body, and this is press-fitted into the through hole of the caliper mounting foot to prevent rotation.

[0005]

[Problems to be solved by the device]

 As described above, when the bush is press-fitted into the caliper mounting foot and fitted, a slight residual tensile stress is generated around the hole after press-fitting, and if the thickness of this part is thin, metal fatigue due to the braking torque progresses. It will be easier. In addition, the knurled groove scratches the inner surface of the through hole, and a crack using this portion as a foothold is likely to occur. Therefore, especially when the mounting foot is made of a material that is likely to undergo stress corrosion failure, there is a concern that the foot supporting the caliper may be damaged, which is not preferable.

Therefore, an object of this invention is to enhance the reliability of the mounting foot in terms of strength by enabling the bush to prevent the mounting foot from being rotated.

[0007]

[Means for Solving the Problems]

 In order to solve the above-mentioned problems, in the present invention, the brim of the bush is formed into a shape having a flat surface or unevenness on the outer periphery and is fitted in a non-circular shape in a seat groove provided at the entrance of the through hole on the mounting foot side.

[0008]

[Action]

 If the brim for retaining the bush is fitted into the seat groove in a non-circular shape, rotation can be stopped without pressing the bush. Therefore, it is not necessary to generate tensile stress around the through hole, and the knurling groove is not necessary, and the inner surface of the through hole is not damaged by this groove.

[0009]

【Example】

 1 and 2 show an embodiment of the present invention. This disc brake is a floating type brake that supports a caliper 1 and a pad 2 slidingly contacting the disc D by a torque member 3 so that the torque member 3 can slide in the disc axial direction, and the torque member is fixed to a knuckle (not shown). Therefore, the caliper mounting foot 4 is provided on the torque member 3.

The caliper mounting leg 4 is provided with a through hole 5 and a seat groove 6 into which the bush 7 is loosely inserted.

A screw hole 8 is provided at the center of the bush 7, and a collar 9 is integrally formed on the outer circumference of one end of this bush. The brim 9 has two flat surfaces 9a arranged in parallel on the outer circumference to form an elongated contour.

The seat groove 6 is formed on the disk-side end surface 4a of the mounting foot 4 so as to accommodate the collar 9 and receive it.

In the exemplary disc brake configured as described above, the bush 7 is inserted into the through hole 5 and the collar 9 is fitted into the seat groove 6. Then, the knuckle mounting surface 4b of FIG. 1 is applied to the knuckle, and a bolt (also not shown) that penetrates the knuckle is screwed into the screw hole 8 and tightened.

At this time, the flat surface 9a of the bush 7 is locked by the two parallel surfaces of the seat groove to prevent the bush 7 from rotating, and therefore, the tightening of the bolt is completed smoothly.

[0015]

[Effect of device]

 As described above, in the disc brake of the present invention, since the bush is not pressed and is rotated, the strength of the caliper mounting foot can be maintained and the mounting reliability can be improved.

[Brief description of drawings]

FIG. 1 is a front view showing an example of a disc brake of the present invention.

FIG. 2 is a perspective view showing the main part of the same.

[Explanation of symbols] 1 caliper 2 pad 3 torque member 4 caliper mounting foot 4a disk side end surface 4b knuckle mounting surface 5 through hole 6 seat groove 7 bush 8 screw hole 9 collar 9a plane surface

Claims (1)

[Scope of utility model registration request] 1. A caliper or a foot for mounting a caliper provided on a torque member is provided with a through hole, a bush with a collar having a screw hole is inserted into the hole, and a fixing bolt to a supporting member is screwed into the bush to mount the caliper. In a disc brake for fixing a foot to a support member, the brim of the bush is non-circularly fitted in a seat groove provided at an inlet portion of the through hole.