JP2546823Y2 - Disc brakes for vehicles - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disc brake for a vehicle in which a friction pad is suspended by a caliper support fixed to a vehicle body.

[0002]

2. Description of the Related Art Disc brakes of this type include, for example,
As disclosed in Japanese Utility Model Publication No. 2-18353, a pair of carrier arms are formed at intervals on the outer peripheral side of a disk of a carrier fixed to a vehicle body, and a pad guide portion is opposed to both caliper support arms. A pair of friction pads are supported on the pad guide so as to be movable in the axial direction of the disk, and a retainer is interposed between the friction pad and the pad guide.

This retainer has a carrier mounting portion mounted on the pad guide portion, a guide portion for guiding the movement of the friction pad in the disk axial direction, and a pad spring portion for pressing the friction pad toward the inner periphery of the disk. The friction pad is suspended between the guide part and the pad spring part with the ear part of the friction pad held therebetween.

[0004]

However, in the above structure, the pad spring presses the lug of the friction pad toward the inner circumference of the disc to prevent the friction pad from floating and rattling. When the pressing force of the friction pad is strong, the sliding property of the friction pad in the disk axis direction is hindered.

Accordingly, an object of the present invention is to provide a disk brake for a vehicle having a pad supporting structure in which the sliding property of a friction pad is improved.

[0006]

According to the present invention, a pair of caliper supporting arms are formed on a caliper support fixed to a vehicle body at an outer peripheral side of a disk with a space therebetween. A pair of friction pads are supported on the friction pad support so as to be movable in the axial direction of the disk, and a retainer is interposed between the friction pad and the friction pad support. In the vehicle disk brake, the friction pad support portion is formed continuously from one side of the disk to the other side across the outer peripheral side of the disk, and the retainer is provided with a torque receiving surface of the friction pad support portion. A pad guide portion that covers and sandwiches the inner and outer sides of the disk, a locking claw that locks both end surfaces of the friction pad support portion in the axial direction of the disk, and a pad guide portion from the outer peripheral side of the disk. A spring portion that is connected to the outer periphery of the disk of the friction pad so as to resiliently contact the friction pad, and a pair of suspension arms extends on the outer periphery of the disk on both sides of the friction pad, and An ear portion is provided between the outer peripheral surface of the disc guide of the pad guide portion of the retainer and the spring portion, and the spring portion elastic contact surface of the ear portion is formed into a tapered surface that converges toward the end. It is characterized by doing.

[0007]

[Operation] With this configuration, since the lug of the friction pad where the spring portion of the retainer elastically contacts has a tapered surface, the pressing force of the spring portion is a force that pushes the friction pad toward the disk inner peripheral side. And the force that pushes the friction pad toward its center.The force that pushes the friction pad toward the center works in the direction that separates the friction pad from the torque receiving surface of the friction pad support, improving the sliding properties of the friction pad. Let it.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings.

The disc brake 1 is provided with a pair of caliper supporting arms 3 formed at intervals on a knuckle 2 serving as a caliper supporting body. Movably supported,
The caliper support arms 3 are provided with friction pad support portions 7 facing each other.

The friction pad support portions 7, 7 are formed continuously from one side of the disk rotor 6 to the other side across the outer peripheral side of the disk rotor 6, and the two friction pad support portions 7, 7 are formed.
Are provided with retainers 8, respectively, and both retainers 8,
8 supports friction pads 9, 9 arranged on both sides of the disk rotor 6.

The retainer 8 is formed by bending a thin metal plate, and includes a torque receiving portion 8a that covers the entire torque receiving surface 7a of the friction pad supporting portion 7, and a disk inner peripheral side of the friction pad supporting portion 7. A holding portion 8b for holding the outer peripheral side 7c with the outer peripheral side 7b;
8c, a pad guide portion 8d, and a torque receiving portion 8a.
Locking pawls 8e, 8e formed at both ends in the disk axial direction of the friction pad supporting portion 7 to be locked at both ends in the disk axial direction.
And an outer peripheral side holding portion 8c of the pad guide portion 8a.
And a spring portion 8f which is continuously provided from above and is folded back in a loop shape.

The friction pad 9 has a pair of suspension arms 9b, 9b extending on both sides of the back plate 9a on the outer peripheral side of the disk, and the outer surface of the suspension arm 9b is connected to the torque receiving portion 8a of the retainer 8. An opposing torque receiving portion 9c and an ear portion 9d protruding from the disk outer peripheral side of the torque receiving portion 9a and inserted between the disk outer peripheral side holding portion 8c of the pad guide portion 8a and the spring portion 8e. And an anti-lifting portion 9e protruding from the inner peripheral side of the disk.

The space between the torque receiving portion 9c of the suspension arm 9b and the torque receiving portion 8a of the retainer 8, and the lifting prevention portion 9
e and the holding portion 8b of the retainer 8 on the inner peripheral side of the disk.
Each of the lugs 9d is formed on a tapered surface that converges the outer peripheral side surface 9f of the retainer 8 on which the outer peripheral side surface 9f of the retainer 8 elastically contacts, toward the end. 9g of the inner peripheral side surface of the disk that slides on the outer peripheral side holding portion 8c of the guide portion 8a
Are formed in a plane.

With such a configuration, the pressing force F1 of the spring portion 8e of the liner 8 that elastically contacts the disk outer peripheral surface 9f of the lug 9d of the friction pad 9 is such that the disk outer peripheral side surface 9f is tapered. A force F2 for pushing the friction pad 9 toward the inner circumference of the disk and a force F3 for pushing the friction pad 9 toward the center thereof.

The component force F2 for pushing the friction pad 9 toward the inner periphery of the disk prevents the friction pad 9 from floating and rattling,
The component force F3 that pushes the friction pad 9 toward the center thereof causes the torque receiving portion 9c of the friction pad 9 to move to the torque receiving portion 8a of the retainer 8.
The friction pad 9 is supported by the retainers 8, 8 in a floating state because the friction pad 9 is separated from the friction pad 9, so that the slidability of the friction pad 9 can be improved.

During the braking operation, the friction pad 9 is slid toward the dispensing side of the disk rotor 6, but the force F3 of the spring portion 8e on the dispensing side causes the torque receiving portion 9c of the friction pad 9 and the torque of the retainer 8 to move. Abrupt collision with the receiving portion 8a is avoided, and the torque receiving portion 9c of the friction pad 9 and the retainer 8
Striking noise generated with the torque receiving portion 8a can be prevented.

Further, since the retainer 8 is mounted on the friction pad supporting portion 7 by the holding portions 8b and 8c connected to the torque receiving portion 8a and the locking claws 8e and 8e, the structure of the pad guide portion 8d is provided. Can be simplified, and the assemblability can be improved and the cost can be reduced.

[0018]

As described above, according to the present invention, the friction pad support formed on the caliper support arm of the caliper support fixed to the vehicle body is applied from one side of the disk to the other side across the outer peripheral side of the disk. A retainer mounted on the friction pad support portion and a pad guide portion for covering the torque receiving surface of the friction pad support portion and holding the inner and outer sides of the disc; Forming a locking claw that locks both end surfaces in the disk axial direction of the pad support portion, and a spring portion that is connected in a loop from the disk outer peripheral side of the pad guide portion and elastically contacts the disk outer peripheral side of the friction pad, A pair of suspension arms are extended on both sides of the friction pad on the outer periphery of the disk, and the suspension arms are provided with ear portions inserted between the outer periphery of the disk of the pad guide portion of the retainer and the spring portion. Of the ear The spring contact surface is formed as a tapered surface that converges toward the end, so that the pressing force of the spring portion of the retainer increases the force that pushes the friction pad toward the inner circumference of the disc and the friction pad in the center direction. The force that pushes the friction pad toward the center acts in the direction that separates the friction pad from the torque receiving surface of the friction pad support,
Improves the sliding properties of the friction pad.

[Brief description of the drawings]

Fig. 1 Enlarged view of main parts

FIG. 2 is a perspective view of a retainer.

FIG. 3 is a sectional view taken along line III-III in FIG. 4;

FIG. 4 is a partial cross-sectional plan view of a disc brake.

FIG. 5 is a sectional view taken along line VV of FIG. 3;

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Disc brake, 2 ... Knuckle, 3 ... Caliper support arm, 5 ... Caliper, 6 ... Disc rotor, 7 ... Friction pad support, 7a ... Torque receiving surface of friction pad support, 8
... Retainer, 8a ... Torque receiving part of retainer, 8b, 8c
... Retainer clamping portion, 8d ... Retainer pad guide portion, 8e ... Retainer locking claw, 8f ... Retainer spring portion, 9 ... Friction pad, 9b ... Friction pad suspension arm,
9d: ear of friction pad, 9f: outer peripheral side of disk of ear

Claims (1)

(57) [Scope of request for utility model registration] 1. A pair of caliper support arms are formed at an interval on the outer peripheral side of a disc of a caliper support fixed to a vehicle body, and friction pad support portions are provided on both caliper support arms so as to face each other. In a vehicle disk brake in which a pair of friction pads are movably supported on a pad support portion in the axial direction of the disc and a retainer is interposed between the friction pad and the friction pad support portion, the friction pad support portion may be provided. ,
Formed continuously from one side of the disk to the other side across the disk outer periphery, the retainer covers the torque receiving surface of the friction pad support, and sandwiches the disk inner and outer circumferences A pad guide portion, a locking claw that locks both end surfaces of the friction pad support portion in the axial direction of the disk, and a loop formed from the disk outer peripheral side of the pad guide portion to resiliently contact the friction pad with the disk outer peripheral side. A spring portion is formed, and a pair of suspending arms are extended on both sides of the friction pad on the outer peripheral side of the disc, and the suspending arm is provided between the disc outer peripheral side of the pad guide portion of the retainer and the spring portion. A disc brake for a vehicle, wherein a lug portion to be inserted is provided, and the spring portion elastic contact surface of the lug portion is formed as a tapered surface that converges toward an end.