JPH09119458A - Friction pad supporting structure of vehicular disk brake - Google Patents

Abstract

PROBLEM TO BE SOLVED: To replace a friction pad without disengaging a caliper body from a caliper supporting arm. SOLUTION: Retainers 7 are locked to be taken out from and put in the shaft direction of a disk, to retainer locking parts 3b, 3b formed on both disk circumferential side surfaces of the bridge part 3 of a caliper body 3, arms 6b, 6b formed by being opposed to the disk periphery side of a friction pad 6 are engaged with both retainers 7, and distance L1 between mutually opposed end surfaces of both arms 6b of the frictional pad 6, is set longer than distance L2 between end surfaces of both retainer locking parts 3b, 3b.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a friction pad support structure for a vehicle disc brake.

[0002]

2. Description of the Related Art In recent years, a disc brake for a vehicle has a caliper support arm integrally formed on a knuckle of the vehicle from the viewpoints of weight reduction of the vehicle, reduction of the number of parts, etc. There is a so-called direct mount type disc brake that supports so as to be movable in any direction.

In this type of disc brake, as disclosed in Japanese Utility Model Laid-Open No. 4-1745, retainers are engaged with retainer engaging portions formed on both side surfaces of the bridge portion of the caliper body in the axial direction of the disc. There is one in which the arm of the friction pad is engaged to suspend the friction pad so as to be movable in the disc axial direction.

[0004]

However, in the structure described above, the caliper body must be removed from the caliper support arm when the friction pad is replaced.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a friction pad support structure for a vehicle disc brake in which the friction pad can be replaced without removing the caliper body from the caliper support arm.

[0006]

In order to achieve the above-mentioned object, according to the present invention, retainers are respectively engaged with retainer engaging portions formed on both side surfaces of a caliper body in a bridge portion disk circumferential direction, and friction is applied to both retainers. In a friction pad support structure for a vehicle disc brake, in which an arm formed to face the disc outer peripheral side of the pad is engaged to suspend the friction pad so as to be movable in the disc axial direction, the retainer is provided with the retainer locking portion. And a distance between opposing end surfaces of both arms of the friction pad is longer than a distance between both end surfaces of the retainer engaging portions.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will now be described in more detail based on the embodiments shown in the drawings. 1 and 2 show a first embodiment of the present invention, in which a vehicle disc brake 1 includes a pair of caliper support arms 2 and 2 formed to face a knuckle of a vehicle, a caliper body 3 and guide pins 4, 4.
While being supported so as to be movable in the disc axial direction at 4,
The disc rotor 5 is attached to the bridge portion 3a of the caliper body 3.
The friction pads 6 and 6 which are arranged to face each other are supported.

In the caliper body 3, retainer engaging portions 3b, 3b are formed on both side surfaces of the bridge portion 3a in the disc circumferential direction, and a retainer 7 having a substantially U-shaped cross section is attached to the retainer engaging portions 3b, 3b. It is locked so that it can be removed and inserted in any direction.

The friction pad 6 has a pair of arms 6 extending to the outer peripheral side of the disc on both sides of the outer peripheral side of the back plate 6a.
b, 6b are formed, and retainer engaging portions 6c are formed in U-shaped recesses on the opposing surfaces of the arms 6b, 6b. The distance L1 between the opposing end surfaces of the arms 6b, 6b is set to Distance L2 between the end faces of the locking portions 3b, 3b
Have been longer than.

The retainer 7 engages with the retainer engaging portion 3b on the side of the opening having a substantially U-shaped cross section and abuts the caliper body 3 on the end surface on the side of the opening. A gap is provided between the locking portion 3b and the end surface, and the retainer engaging portion 6c of the friction pad 6 is engaged with the outer surface on the side of the closed portion to support the friction pad 6 movably in the disc axial direction. ing.

The friction pads 6 come into contact with the guide retainers 8 mounted on the opposite surfaces of the caliper support arms 2 and 2 on both sides in the circumferential direction of the disc so that the braking torque is received by the caliper body support arms 2 and 2. It is arranged.

The disc brake 1 for a vehicle constructed as described above is provided with retainer engaging portions 3b, 3 of the caliper body 3.
b is provided with a retainer 7 which can be inserted and removed in the axial direction of the disc, and the distance L1 between the facing end surfaces of the arms 6b and 6b of the friction pad 6 is set between the respective end surfaces of the retainer engaging portions 3b and 3b of the caliper body 3. Since it is longer than the distance L2, the friction pad 6 can be replaced without removing the caliper body 3 from the caliper support arms 2 and 2, and the workability can be improved.

FIG. 3 shows a second embodiment of the present invention. Retainers 10 which can be inserted and removed in the disc axial direction are attached to the retainer engaging portions 3b, 3b of the caliper body 3 with screws 11, respectively. The arms 6b, 6b of the friction pad 6 are engaged with, the opening side end surface of the retainer 10 is brought into contact with the caliper body 3, and between the disk circumferential inner surface on the closed side and the end surface of the retainer locking portion 3b. The caliper support arms 2 and 2 are formed by providing a gap and contacting the retainer engaging portion 6c of the friction pad 6 on the outer surface on the closed portion side so that the braking torque is directly received by the caliper body 3. Since the caliper body 3 can be assembled without any change, the cost can be reduced in addition to the effect of the first embodiment.

[0014]

As described above, in the friction pad support structure for a vehicle disc brake according to the present invention, retainers are respectively attached to retainer engaging portions formed on both sides of the bridge portion of the caliper body in the disc circumferential direction in the disc axial direction. Retainably engageable with each other, engage both retainers with the arms formed facing the disc outer peripheral side of the friction pad, and measure the distance between the opposing end faces of both arms of the friction pad between the retainer engaging part end faces. Since it is longer than the distance, the friction pad can be replaced without removing the caliper body from the caliper support arm, which improves workability.

[Brief description of the drawings]

FIG. 1 shows a first embodiment of the present invention, and shows II in FIG.
It is sectional drawing.

FIG. 2 is a plan view of a vehicle disc brake.

FIG. 3 is a cross-sectional view showing a second embodiment example.

[Explanation of symbols]

1 ... Vehicle disc brake, 2 ... Caliper support arm, 3
... caliper body, 3a ... bridge part of caliper body 3, 3b ... retainer engaging part of caliper body 3, 4 ... guide pin, 5 ... disk rotor, 6 ... friction pad, 6b
... Arm of friction pad 6, 6c ... Retainer engaging portion of friction pad 6, 7, 10 ... Retainer

Claims (1)

[Claims] Claims: 1. Retainers are respectively engaged with retainer engaging portions formed on both sides of the bridge portion of the caliper body in the disc circumferential direction, and both retainers are engaged with arms formed opposite to the disc outer peripheral side of the friction pad. In a friction pad support structure for a vehicle disc brake that suspends a friction pad so as to be movable in the disc axial direction, the retainer is locked in the retainer locking portion so that the retainer can be inserted and removed in the disc axial direction. A friction pad support structure for a vehicle disc brake, wherein a distance between opposing end faces of both arms is longer than a distance between the retainer engaging portion end faces.