JPH0571470U - Disc brake device - Google Patents

Abstract

(57) [Summary] (Modified) [Purpose] To prevent damage to the boot that covers the sliding part of the guide pin bush of the disc brake, and to facilitate the disc brake assembly work. [Structure] A caliper 3 can be slid with respect to a tokule receiving member 2 by screwing guide pins 4 inserted into a pair of holes provided in an arm portion 3a of the caliper 3 through a bush 8 into a torque receiving member 2. In the disc brake in which the boot 9 is mounted between the arm portion 3a of the caliper 3 and the bush 8 to protect the sliding portion, the bush 8 is provided on the torque receiving member 2 side facing the bush 8. A guide slope 12b is provided to facilitate movement in a direction away from the torque receiving member 2.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a disc brake mounted on an automobile.

[0002]

[Prior Art]

 FIG. 4 shows a state where a slide pin portion of a conventional disc brake is being assembled. In the figure, a is a torque receiving member of a disc brake, b is an arm of a caliper, c is a bush inserted in the arm b, and d is a boot mounted between the bush c and the arm b.

[0003]

[Problems to be solved by the device]

 As shown in FIG. 4, in order to assemble the disc brake, the arm b of the caliper is moved as shown by the arrow B so that the shaft hole e of the bush c and the screw hole f of the torque receiving member a are aligned with each other. In this state, a guide pin (not shown) is inserted and screwed in. In this case, if the bush c projects to the torque receiving member a side as shown in the figure, the boot d will be inserted into the torque receiving member. There is a problem that the boot d is damaged by hitting a and that the bush c must be pushed in advance in order to prevent it, which is troublesome.

The technique disclosed in Japanese Utility Model Publication No. 2-506 is one method for solving the above-mentioned problem, but it is a technique in which one end of the bush has a larger diameter than the outer diameter of the boot. To protect the boot from damage. However, this method has a problem in that the bushing is complicated and the boot assembly is complicated.

[0005]

[Means for Solving the Problems]

 In order to solve the above-mentioned problems, in the present invention, a guide pin inserted through a bush into a pair of holes provided in an arm of a caliper is screwed into a torque receiving member so that the caliper receives the torque receiving member. In a disc brake that is slidably attached to a member and has a boot installed between the arm portion of the caliper and the bush to protect the sliding portion, the torque receiving member side facing the bush. In addition, the disc brake device is configured by providing a guide slope for facilitating the movement of the bush in the direction away from the torque receiving member.

[0006]

[Action]

 According to the device of the present invention configured as described above, when the caliper is moved toward the center of the axle when the caliper is mounted on the torque receiving member fixed to the vehicle body, the caliper moves from the arm portion of the caliper. The excessively protruding bush automatically retracts in the direction away from the torque receiving member along the guide slope provided on the torque receiving member, which facilitates assembly. Further, when the bush and the guide slope contact each other, the boot is not pinched, so that the boot can be reliably prevented from being damaged. Further, according to the present invention, since it is not necessary to perform complicated processing on the bush, the bush can be easily manufactured.

[0007]

【Example】

 Hereinafter, an embodiment of the present invention will be described with reference to FIGS. In the figure, 1 is a disc rotor, 2 is a torque receiving member of a disc brake fixed to a vehicle body (not shown), 3 is a caliper mounted on the torque receiving member 2 via two guide pins 4, 5 Is a piston provided in the caliper 3, 6 is an inner pad pushed out by the piston 5, and 7 is an outer pad arranged so as to face the inner pad 6 via the disc rotor 1.

Reference numeral 3a is an arm portion provided on both sides of the caliper 3. A hole 3b is formed in the arm portion 3a, and a bush 8 for fitting with the guide pin 4 is inserted into the hole 3b. The bellows type boot 9 is mounted between the protruding portion of the bush 8 and the arm portion 3a. Reference numeral 10 is a cap fitted to the end of the arm portion 3a opposite to the torque receiving member 2, and 11 is a plug fitted into the cap 10.

As a method of assembling the caliper 3 to the torque receiving member 2, one of the pair of guide pins 4 is attached to the torque receiving member 2 and the caliper 3 is rotated by using the one guide pin 4 as a fulcrum to rotate the other. The guide pin 4 and the guide pin 4 are not attached, but the caliper 3 is positioned so as to cover the torque receiving member 2 from the outer peripheral direction, and then the guide pins 4 are attached. There is no problem, either way.

In the embodiment shown in FIG. 2, the opposed bush 8 is separated from the torque receiving member 2 at the edge portion outside the screw hole 2a for screwing the guide pin 4 provided in the torque receiving member 2. A guide slope 2b is provided to facilitate the movement of the.

In the embodiment shown in FIG. 3, the plate 12 is joined to the end face 2c of the torque receiving member 2 having the screw hole 2a for screwing the guide pin 4, and the outer portion 12a of the plate 12 is joined. Is bent at an angle to form a guide slope 12b for facilitating the opposing bush 8 to move away from the torque receiving member 2.

[0012]

[Effect of the device]

 According to the device of the present invention, the caliper 3 is moved toward the center of the axle when the caliper 3 is assembled to the torque receiving member 2 fixed to the vehicle body. The bush 8 that protrudes excessively from the arm portion 3a of the worm automatically retreats in the direction away from the torque receiving member 2 along the guide slope 2b (12b) provided on the torque receiving member 2, so that the assembly is easy. It will be easier. In addition, when the bush 8 and the proposed slope 2b (12b) come into contact with each other, the boot 9 is not pinched, so that the boot 9 can be reliably prevented from being damaged. Further, according to the present invention, since it is not necessary to perform complicated processing on the bush 8, the bush 8 can be easily manufactured.

[Brief description of drawings]

FIG. 1 is a plan view showing a part of a disc brake according to the present invention in section.

FIG. 2 is a partially enlarged view showing a main part of the present invention in a section taken along the line AA of FIG.

FIG. 3 is a partially enlarged cross-sectional view showing another embodiment of the present invention.

FIG. 4 is a partially enlarged sectional view showing an example of a conventional device.

[Explanation of symbols]

 1 disk rotor 2 torque receiving member 2a screw hole 2b guide slope 3 caliper 3a arm 4 guide pin 5 piston 6 inner pad 7 outer pad 8 bush 9 boot 10 cap 11 plug 12 plate 12a outer side 12b guide slope

Claims (1)

[Scope of utility model registration request] 1. A caliper is slidably attached to the torque receiving member by screwing guide pins inserted into a pair of holes provided in an arm portion of the caliper via bushes into the torque receiving member, In a disc brake in which a boot is mounted between the arm portion of the caliper and the bush to protect the sliding portion,
A disc brake device, wherein a guide slope for facilitating the movement of the bush in a direction away from the torque receiving member is provided on the side of the torque receiving member facing the bush.