JPH06300060A - Disc brake for vehicle - Google Patents

Abstract

PURPOSE:To reduce the unsprung weight by simplifying the structure for supporting a friction pad and a caliper to reduce the number of parts. CONSTITUTION:Each one end of two sliding pins 6, 6 is supported by a caliper supporting arm 5 provided in a front fork 4 so as to ride over the outer periphery of a disc 2, and each supporting arm 7d, 7e is projected in both sides of an acting part 7a and a reacting part 7b of the caliper 7, and a sliding pin guide hole 7f is formed in each supporting arm 7d, 7e. Next, two sliding pins 6,6 are inserted to the sliding pin guide holes 7f, and the two sliding pins 6, 6 hoist friction pads 3, 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle disc brake having a pin slide type caliper, and more particularly to a vehicle disc brake suitable for motorcycles, tricycles, four-wheel buggies and the like.

[0002]

2. Description of the Related Art In a vehicle disc brake, for example,
As disclosed in Japanese Utility Model Publication No. 63-36175, a holder is arranged on one surface side of a disk that rotates integrally with a wheel and fixed to a non-rotating member of a vehicle. Each of the slide pins is provided in a direction away from the one side of the disc, and the two slide pins support the caliper so as to be movable in the disc axial direction. The friction pad disposed on the other surface side of the disk by the support pin provided on the side opposite to the holder of the caliper extends to the other surface side of the disk across the outer circumference of the disk to the sliding pin on the outer peripheral side of the disk. There is one in which a friction pad support portion is extended and is supported by the friction pad support portion and a support pin provided on the caliper so as to be movable in the disc axial direction.

[0003]

However, in the above structure, the holder is required to support the caliper, and the holder, the sliding pin, and the support pin are required to support the friction pad, which complicates the structure. At the same time, the unsprung weight increases, which is disadvantageous in terms of cost.

Therefore, an object of the present invention is to provide a vehicle disc brake in which the supporting structure for the caliper and the friction pad is simplified and the unsprung weight is reduced.

[0005]

In order to achieve the above object, the present invention relates to a vehicle disc brake which supports a caliper movably in the disc axial direction via two sliding pins. The sliding pin is cantilevered on the caliper support arm provided on the vehicle body across the outer circumference of the disc.
Support arms are provided on both sides of the caliper on the working part side and the semi-working part side, respectively, and sliding pin guide holes are formed in the supporting arms, respectively, and the two sliding parts are inserted in the sliding pin guide holes. It is characterized in that the pins are respectively inserted and the friction pads are suspended by the two sliding pins.

[0006]

[Operation] According to the above configuration, since the caliper and the friction pad are movably supported in the disc axial direction by the two sliding pins provided on the caliper support arm, the structure is simplified and unsprung weight can be reduced. .

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment in which the present invention is applied to a front brake of a motorcycle will be described below with reference to the drawings.

The disc brake 1 includes a disc 2 which rotates integrally with a wheel, friction pads 3 and 3 which are arranged on opposite sides of the disc 2, and two slides provided on a caliper support arm 5 of a front fork 4. It is composed of a caliper 7 which is supported by moving pins 6 and 6 so as to be movable in the axial direction of the disk 2.

The friction pads 3 and 3 have the same structure, and a lining 3a slidably contacting the disc 2 is fixed to the back plate 3b, and the sliding pins 6 are attached to the left and right ears 3c and 3c of the back plate 3b on the outer peripheral side of the disc 2. A semi-circular concave portion 3d that engages with 6 is formed.

The caliper support arm 5 is formed by straddling the outer periphery of the disc 2 from the disc 2 side of the front fork 4 and being bent 90 degrees along the outer periphery of the disc 2 on the other surface side of the disc 2.

The caliper support arm 5 is provided with two sliding pins 6 and 6 spaced from each other, and the friction pads 3 and 3 and the caliper 7 are arranged between the sliding pins 6 and 6. ing.

The sliding pins 6 and 6 have the same structure, and the bolt 6
a and a sleeve 6b externally fitted to the bolt 6a. The front end side of the caliper support arm 5 and the front fork 4 side are respectively screwed from one surface side of the disk 2 across the outer periphery of the disk 2 to a cantilever. It is supported.

The caliper 7 has a working portion 7a arranged on one surface side of the disk 2 and a reaction portion 7b arranged on the other surface side of the disk 2 connected by a bridge portion 7c straddling the outer circumference of the disk 2. A piston 8 movable in the axial direction of the disc 2 by hydraulic action is fluid-tightly fitted and inserted into the cylinder hole 7d of the action portion 7a, and the friction pad 3, is formed on the inner peripheral side of the disc 2 of the bridge portion 7c. 3 are arranged.

Further, in the caliper 7, support arms 7d and 7d are provided on the front end side of the caliper support arm 5 of the action portion 7a and the front fork 4, and on the front end side of the caliper support arm 5 of the reaction portion 7b and the front fork 4 side. Support arms 7e, 7e
Are respectively projected, and each support arm 7d, 7d, 7e, 7e
The sliding pin guide hole 7f is formed in each of the above.

This caliper 7 is a caliper support arm 5.
Of the sliding pin 6 in the sliding pin guide holes 7f of the support arms 7d and 7e on the tip side of the sliding pin 6 and in the sliding pin guide holes 7f of the supporting arms 7d and 7e on the front fork 4 side of the sliding pin 6 respectively. The friction pads 3 and 3 are inserted through the other ends and are supported so as to be movable in the axial direction of the disc 2, and the friction pads 3 and 3 are provided with recesses 3d formed in the left and right ears 3c and 3c of the back plate 3b.
And is movably suspended in the axial direction of the disc 2.

When hydraulic pressure is applied to the cylinder hole 7d of the caliper 7, the piston 8 advances to the one surface side of the disk 2 and slides the friction pad 3 arranged on the one surface side of the disk 2 to the one surface side of the disk 2. Cylinder hole 7
The caliper 7 moves in the direction away from the one surface side of the disk 2 by the hydraulic pressure acting on the bottom part of d, and the reaction portion 7b of the caliper 7 causes the friction pad 3 disposed on the other surface side of the disk 2 to move to the other surface of the disk 2. Sliding against the side for braking. During braking, the braking torque acting on the friction pads 3 and 3 and the caliper 7 is transmitted to the sliding pin 6 in the rotational direction.

By configuring the disc brake 1 as described above, the support structure of the friction pads 3, 3 and the caliper 7 can be simplified as compared with the conventional one, the number of parts can be reduced, the unsprung weight can be reduced, and the cost can be reduced. It is also advantageous.

[0018]

As described above, in the disc brake of the present invention, the two caliper support arms provided on the vehicle body are cantilevered over the outer circumference of the disc so that the caliper acts half-way. Supporting arms are respectively provided on both sides of the side, and sliding pin guide holes are respectively formed in the supporting arms, and the two sliding pins are inserted into the sliding pin guide holes, respectively. Since the friction pad is suspended by the two sliding pins, the support structure of the friction pad and the caliper can be simplified compared to the conventional structure, the number of parts can be reduced, the unsprung weight can be reduced, and the cost is also advantageous. is there.

[Brief description of drawings]

FIG. 1 is a sectional view taken along line I-I of FIG.

FIG. 2 is a front view of a disc brake showing an embodiment of the present invention.

3 is a sectional view taken along line III-III in FIG.

[Explanation of symbols]

1 ... Disc brake, 2 ... Disc, 3 ... Friction pad, 4 ... Front fork, 5 ... Caliper support arm,
6 ... Sliding pin, 7 ... Caliper, 7a ... Caliper action part, 7b ... Caliper reaction part, 7d, 7e ... Caliper support arm, 7f ... Sliding pin guide hole

Claims (1)

[Claims] 1. A disc brake for a vehicle, which movably supports a caliper in a disc axial direction via two sliding pins, wherein the two sliding pins are attached to a caliper support arm provided on a vehicle body and a disc outer circumference is provided. Cantilevered across the
Support arms are provided on both sides of the caliper on the working part side and the semi-working part side, respectively, and sliding pin guide holes are formed in the supporting arms, respectively, and the two sliding parts are inserted in the sliding pin guide holes. A disc brake for a vehicle, wherein each of the pins is inserted and a friction pad is suspended by the two sliding pins.