JPH05288230A - Disk brake - Google Patents

Abstract

PURPOSE:To prevent a brake from dragging by reducing the sliding resistance of a friction pad. CONSTITUTION:An inner pad 2 and an outer pad 3 are disposed on both sides of a disk rotor 1 which rotates integrally with wheels. The inner pad 2 has ear portions 2a, 2a formed at opposite end portions thereof and is supported slidably in the direction of the axis of the disk rotor 1 by a mounting 4 secured to a vehicle body holddown member on the inner side of the disk rotor 1. The inner pad 2 is pressed at its back toward the disk rotor 1 by a pair of pistons disposed along the direction of rotation of the disk rotor 1. The outer pad 3 is so designed to be pressed toward the disk rotor 1 by a reaction claw 5b1. Thereby the pads slide within a pad clip and in the direction of the axis of the disk rotor without sliding resistance.

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 braking a vehicle.

[0002]

2. Description of the Related Art Conventionally, as this type of technology, for example,
Japanese Utility Model Publication No. 60-21559 discloses a first interposition between the side edge portion of the friction pad and the arm portion of the fixed support member.
A shim portion, a second shim portion integrally formed at the outer end of the first shim portion in the radial direction of the disc, and interposed between the side edge portion of the friction pad and the stopper portion of the fixed support member, and the radial direction of the disc in the first shim member. Legs that are integrally molded to the inner end and contact the outer surface of the fixed support member in the radial direction of the disk, and elasticity that contacts the inner surface of the leg in the radial direction of the disk to urge the friction pad outward in the radial direction of the disk. And a tongue portion. In addition, the elastic tongue portion that abuts the inner surface of the leg portion in the radial direction of the disc to urge the friction pad outward in the radial direction of the disc causes the side edge portion of the friction pad to contact the fixed support member via the second shim portion. Press against the stopper to prevent the friction pad from rattling.

[0003]

However, in the above-mentioned prior art, the friction pad is contacted by the elastic tongue portion which abuts the inner surface of the leg portion in the radial direction of the disc and urges the friction pad outward in the radial direction of the disc. The side edge of the friction pad was pressed against the stopper of the fixed support member through the second shim to prevent the friction pad from rattling. Direction, and because there is no clearance between the side edge of the friction pad and the second shim portion, the sliding resistance of the friction pad increases without sliding smoothly in the member. This may cause the brake to drag.

In view of this, the present invention solves the above problem, that is, the clearance between the friction pad and the shim member is maintained to some extent and the sliding resistance of the friction pad is reduced to prevent the drag of the brake. Is the technical problem.

[0005]

[Constitution of the invention]

[0006]

SUMMARY OF THE INVENTION The technical means of the present invention taken to solve the above-mentioned technical problems of the present invention is a pair of brake pads facing each other via a disk rotor that rotates integrally with a wheel, and a notch. A pair of brake pads, each of which has a portion, is supported slidably in the rotational axis direction of the disc rotor in the cutout portion, and is fixed to a fixed portion of the vehicle; A caliper that presses each of the brake pads toward the disc rotor, a first guide portion that is disposed on a surface that receives the brake pad from one side of the mounting notch portion in the disc rotor rotation direction, and a disc rotor radius of the mounting notch portion. The second guide portion disposed on the surface that receives the brake pad from the outside in the direction, and the blur of the notch portion of the mounting. The thickness along the inner surface of the cutout portion between the side end surfaces of the pair of the brake pads and the inner surface of the cutout portion facing the side end surfaces, and the third guide portion provided on the surface that receives the brake pad from the radially inner side. A pad clip that is engaged with the mounting straddling the direction, an elastic member that is interposed between the pad clip and the notch of the mounting, and is attached to the first, second, and third guide portions, and a rotation shaft of the disc rotor. The brake pad includes a corrosion-resistant cap that is slidably fitted in the ear portion of the brake pad in the pad clip having the first, second, and third guide portions with respect to the direction.

[0007]

The above technical means works as follows. One brake pad presses one side of the rotating disk rotor, the caliper is displaced by the reaction force, and the other brake pad presses the other side to perform a braking action.

At this time, the ear of the brake pad and each of the first and second
Between the pad clips having the second and third guide portions, in order to prevent slidability and rattling, a disc rotor shaft is mounted by attaching a corrosion resistant cap to the ear portion of the brake pad. Slides in the pad clip in the direction without sliding resistance.

Further, by providing an elastic member which is interposed between the pad clip and the notch of the mounting and is attached to each of the first, second and third guide portions, the first member is provided when the braking operation is released.
The guide portion absorbs vibration of the brake pad received from one side in the disc rotor rotation direction and prevents a collision sound between the pad clip and the notch of the mounting. Also the second
The third guide portion prevents abnormal noise of the vibration of the pad clip and the brake pad in the radial direction of the disc rotor due to the vibration of the brake pad.

[0010]

Embodiments to which the present invention is applied will now be described in detail with reference to the accompanying drawings.

A description will be given with reference to FIGS. 1 and 2 to 3.
The disc brake 10 includes an inner pad 2, an outer pad 3, a mounting 4, and a caliper 5.

The inner pad 2 and the outer pad 3 are arranged on both sides of the disk rotor 1 which rotates integrally with the wheel. The inner pad 2 has ears 2a, 2 on both end portions.
b is formed on the inner side of the disc rotor 1 so as to be slidable in the axial direction of the disc rotor 1 by a mounting 4 which will be described later and which is fixed to a fixing member (not shown) of the vehicle body. 1 is configured to be pressed toward the disc rotor 1 by a pair of pistons (not shown) arranged along the rotation direction of 1. The outer pad 3 is the reaction claw 5 of the caliper 5.
It is configured to be pressed toward the disc rotor 1 by b1.

The mounting 4 is formed with arms 4a and 4b. The arm portions 4a and 4b have cutout portions 4c. The caliper 5 is composed of a cylinder portion 5A and a reaction portion 5B. The cylinder part 5A is
It is arranged on the back of the inner pad 2. The reaction portion 5B includes a reaction claw 5b1 that comes into contact with the back surface of the outer pad 3, the disc rotor 1, and both pads 2 and 3.
Has a bridge portion 5b2 disposed on the outer periphery of the.

4, FIG. 5, FIG. 6 to FIG. 7, the pad clip 6 is a metal member having corrosion resistance and spring properties, and the first guide portion 6a and the second guide portion 6 are provided.
b, a third guide portion 6c, and arm portions 6d and 6d1. The pad clip 6 is attached to the mounting 4
It is provided between the inner surfaces of the cutout portions 4c of the arm portions 4a and 4b and the two ear portions 2a and 3a of the pads 2 and 3, respectively. One arm portion 6d of the pad clip 6 is on the outer side of the pads 2 and 3, and the other arm portion 6d1 is on the side of the pads 2 and 3 of the disc rotor 1 side. The earrings 2a, 3a of 3 are locked to the manting 4 so as to be sandwiched in the thickness direction along the inner surface of the cutout portion 4c and the inner surface of the cutout portion 4c facing the side end surface.

The first guide portion 6a has a notch 4 in the mounting 4 for receiving the pads 2 and 3 from the side surfaces of the ears 2a and 3a of the pads 2 and 3 and from one side in the rotation direction of the disk rotor 1.
It is arranged between the side surface portions 4c1 of c. A shim member 7 is attached to the side surface portion 4c1 side of the first guide portion 6a. The shim member 7, together with the pads 2 and 3, prevents the pad clip 6 from making noise due to rattling due to displacement of the side surface 4c1 of the mounting 4 in the rotation direction of the disk rotor 1.

The second guide portion 6b has an upper surface side of the ears 2a, 3a of the pads 2, 3 and an upper surface side 4c2 of the notch 4c for receiving the pads 2, 3 from the outside in the radial direction of the disk rotor 1.
It is arranged in between. An elastic member 8 is attached to the upper surface 4c2 side of the cutout portion 4c of the second guide portion 6b. The elastic member 8 has a rubber property, and each of the pads 2 and 3 reduces vibration of the upper surface 4c2 of the mounting 4 outward in the radial direction of the disc rotor 1 and prevents abnormal noise due to the vibration. ing.

The third guide portion 6c is arranged so as to come into contact with the lower surface portion 4c2 of the cutout portion 4c and the surfaces of the pads 2 and 3 facing inward in the radial direction. An elastic member 8a is attached to the lower surface 4c3 side of the cutout portion 4c of the third guide portion 6c. The elastic member 8a has a rubber property,
The pads 2 and 3 alleviate vibrations of the lower surface 4c3 of the mounting 4 inward in the radial direction of the disc rotor,
Moreover, the abnormal noise caused by the vibration is prevented.

In addition, in FIG. 8 to FIG. 8 (α), the cap 9 includes the pads 2 and 3 and the pad clip 6 due to the rising of rust generated on the ears 2a and 3a of the pads 2 and 3.
This is a metal member that is provided to prevent an increase in sliding resistance between them. The cap 9 is formed in a box-like shape so as to fit the pads 2 and 3, and the ears 2a and 3a of the pads 2 and 3 are formed.
Is fitted into. The pads 2 and 3 are attached to the first, second and third guide portions 6 with respect to the rotation axis direction of the disc rotor 1.
A clearance slidable in a, 6b, 6c is maintained between the ears 2a, 3a of the pads 2, 3.

[0019]

As described above, according to the present invention, the pad clip having the ear portion of the brake pad and each of the first, second and third guide portions is slidable and does not rattle. Therefore, by attaching a corrosion resistant cap to the ear portion of the brake pad, it is possible to prevent the brake from dragging by sliding in the pad clip in the axial direction of the disc rotor without sliding resistance. Further, by providing an elastic member which is interposed between the pad clip and the notch portion of the mounting and is attached to each of the first, second and third guide portions, the first guide portion when the braking operation is released has the same direction as the disc rotor rotation direction. It reduces the vibration of the brake pad received from the side and prevents the collision noise between the pad clip and the mounting notch. Further, the second and third guide portions prevent the abnormal noise of the vibration of the pad clip and the brake pad in the radial direction of the disc rotor due to the vibration of the brake pad, so that the intended purpose can be achieved.

[Brief description of drawings]

FIG. 1 is a side view showing a configuration of a disc brake of this embodiment.

FIG. 2 is a front view showing the configuration of the disc brake of this embodiment.

FIG. 3 is a back view showing the configuration of the disc brake of the present embodiment.

FIG. 4 is a top view showing the entire pad clip of this embodiment to which the present invention is applied.

5 is a front view showing the entire pad clip from the line of sight A shown in FIG. 4. FIG.

6 is a side view showing the entire pad clip from the line of sight B shown in FIG. 4. FIG.

7 is an opposite view showing the entire pad clip from the line of sight C shown in FIG. 4. FIG.

FIG. 8 is a back view showing the configuration of the cap of this embodiment to which the present invention is applied.

[Explanation of symbols]

1 Disc Rotor 2 Inner Pad 2a Ear Part 3 Outer Pad 3a Ear Part 4 Mounting 4a, 4b Arm Part, 4c Notch Part 4c1 Side Part, 4c2 Top Part, 4c3 Bottom Part 5 Caliper 6 Pad Clip, 6a, 6b, 6c 1st , Second,
Third guide portion 6d, 6d1 Arm portion 7 Shim member 8 Elastic member 9 Cap 10 Disc brake

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Masayoshi Katagiri 1 Toyota Town, Toyota City, Aichi Prefecture Toyota Automobile Co., Ltd.

Claims (1)

[Claims] 1. A pair of brake pads facing each other through a disk rotor that rotates integrally with a wheel, and a pair of brake pads each having a notch so that the pair of brake pads are slidable in the rotational axis direction of the disc rotor. A mounting part that is supported in the mounting part and fixed to a fixed part of the vehicle; a caliper that is slidably mounted on the mounting part and presses each of the pair of brake pads toward the disc rotor; and a notch part of the mounting part. A first guide portion disposed on a surface that receives the brake pad from one side of the disc rotor rotation direction, and a second guide portion disposed on a surface that receives the brake pad from a disc rotor radial outer side of a notch portion of the mounting. The brake from the inside of the guide pad and the notch of the mounting in the radial direction of the brake pad. A third guide portion arranged on a surface for receiving the pad, and a side surface of the pair of brake pads, and an inner surface of the cutout portion facing the side end surfaces, and a thickness direction along the inner surface of the cutout portion. A pad clip that straddles over and is locked to the mounting; an elastic member that is interposed between the pad clip and the notch of the mounting and attached to the first, second, and third guide portions; A corrosion-resistant cap that is fitted into the ear of the brake pad so that the brake pad is slidable in the pad clip having the first, second, and third guide portions with respect to the rotation axis direction of the rotor. A disc brake for a vehicle, which includes: