JPH06200965A - Fitting construction of outer shim for disc brake - Google Patents

Abstract

PURPOSE:To provide a multifunctional shim by which generation of noise at braking and non-braking can be restrained, assembling can be simplified, and the number of parts can be reduced. CONSTITUTION:This outer shim 60 is fitted on the back of the back metal 41 of an outer pad 40, anti-rattle parts 62 extendingly provided on both ends in the circumferential direction from the main body part 61 of the outer shim 60 are interposedly inserted between the torque receiving parts of a carrier and the torque transmission parts 43 of the friction pad 40, and at least one extending part 63 extended outward from the upper part of the shim main body part 61 is brought in elastical contact with the inner face of the carrier, so as to elastically support the torque receiving part of the carrier and the torque transmission part 43 of the outer pad 40. Further, holding parts 64 extendingly provided from the lower part of the shim main body part 61 are brought in elastical contact with the outside of a reaction part, so as to elastically fit the outer pad 40 to the reaction part.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an outer shim mounting structure for a disc brake.

[0002]

2. Description of the Related Art In a disc brake, it is known that a shim inserted between a reaction portion of a caliper and a back metal of an outer pad is provided with another function in addition to the original function of the shim. For example, in JP-A-57-167538, an impact damping piece is formed integrally with a shim to prevent impact noise between a torque receiving portion of a carrier and a torque transmitting portion of a friction pad, which is generated during braking. It is disclosed. It is also known that, for example, a wear warning piece is formed integrally with a shim, and when the friction material of the friction pad reaches the wear limit, the wear warning piece that abuts the rotor vibrates to notify the friction pad replacement time. There is.

[0003]

The above-mentioned conventional shim has the following problems.

<a> In the shim integrally formed with the shock-damping piece, the friction pad is not restricted in the rotor circumferential surface direction when the brake is not applied, so that the rattle noise accompanying the vibration of the vehicle is surely generated. Cannot be prevented. In addition to requiring a separate elastic grip to press the friction pad toward the center of the rotor, the elastic claw formed on the shim for attaching to the back metal of the friction pad exerts unreasonable force and deforms the elastic claw. It may be broken or damaged.

<B> When assembling the caliper or replacing the pad, there was no shim having a holding portion or the like that can be mounted on the pad with one touch by rotating the caliper with one guide pin supporting the caliper as a fulcrum. .

[0006]

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to provide a mounting structure for an outer shim in the following disc brake.

[0007] An outer shim mounting structure for a disc brake capable of suppressing the generation of noise during braking.

An outer shim mounting structure for a disc brake, which is easily mounted on a friction pad.

[0009] An outer shim mounting structure for a disc brake that can prevent the friction pad from being dragged when the brake is released.

An outer shim mounting structure for a disc brake, which can reduce the number of constituent parts.

[0011]

SUMMARY OF THE INVENTION According to the present invention, a carrier fixed to a non-rotating member of a vehicle is provided with a caliper straddling a part of outer circumference of a disk rotor so as to be slidable in a rotor axial direction by a pair of guide pins. The friction pads of the pair of friction pads are engaged with the carrier in a state where the friction pads are allowed to slide in the axial direction of the rotor, and are inserted between the reaction portion formed on the caliper and the outer pad backing metal facing the reaction portion. In a disc brake having a formed shim, from the main body of the shim attached to the back surface of the outer pad backing metal, extending from both ends in the circumferential direction between the torque receiving portion of the carrier and the torque transmitting portion of the friction pad. The torque of the carrier is formed by forming an anti-rattle part to be inserted and elastically contacting at least one extension part extending outward from the upper part of the shim body part with the inner surface of the caliper. And a torque transmitting portion of the outer pad are elastically supported, and a holding portion extending from the lower portion of the shim body portion and bent so as to embrace the reaction portion of the caliper is provided outside the reaction portion. An outer shim mounting structure for a disc brake, wherein the outer pad is elastically attached to the reaction portion by elastic contact.

[0012]

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

<A> Overall Structure of Disc Brake FIG. 2 shows a plan view of the disc brake, and FIG. 3 shows a central sectional view of the disc brake. The carrier 10 has torque receiving portions 11, 11 formed at both ends thereof, and is fixed to a non-rotating member (not shown) of the vehicle. The caliper 20 includes a hydraulic pressure actuating unit 21 and a reaction unit 22 which is located across the disc rotor A so as to face the hydraulic pressure actuating unit 21.
And a mechanical actuating device part 23 located behind the hydraulic actuating device part 21. The caliper 20 is supported by a pair of guide pins 30 and 31 fixed to the torque receiving portions 11 and 11 of the carrier 10. A piston 32 is slidably fitted in a cylinder hole 24 formed in the caliper 20 to form a hydraulic operating unit 21. Piston 3
A pair of friction pads 40 and 50 that press the both side surfaces of the rotor A by means of 2 and the reaction portion 22 for braking allow sliding between the torque receiving portions 11 and 11 of the carrier 10 in the axial direction of the rotor A. It is placed in a horizontal position.

<B> Friction Pads The friction pads 40 and 50 have friction materials 42 and 52 fixed to the surfaces of the backing plates 41 and 51, and can be fitted to the torque receiving portions 11 and 11 on both sides of the backing plates 41 and 51. Torque transmission unit 4
3 are recessed respectively. In this embodiment, outer shims 6 to be described later are provided on both sides of the back metal 41 of the outer friction pad 40.
The case where the protrusions 44 for fixing 0 are provided is shown, but the protrusion 44 may be omitted in some cases.

<C> Outer Shim The outer shim 60 inserted between the back metal 41 of the outer pad 40 and the reaction portion 22 has a main body 61 of substantially the same shape as the back metal 41 of the outer pad 40, as shown in FIGS. The carrier 10 extends from both sides of the main body 61 to both ends in the circumferential direction.
Torque receiving portion 11 and outer pad 40 torque transmitting portion 4
A pair of anti-rattle parts 62, 62 inserted between
And an extension part 63 extending from the upper part of the main body part 61 to the outer periphery,
63 and holding portions 64, 64 extending from below the main body portion 61 and bent to hold the reaction portion 22 of the caliper 20.
And the wear warning pieces 65, 65 that are bent from the main body portion 61 toward the rotor A side and extend to the wear limit position of the friction material 42 are integrally formed. In the outer shim 60, for example, a connecting claw 67 bent in a substantially L shape from the upper central portion of the main body portion 61 toward the pad 40 side is elastically contacted with the side surface of the pad 40, and a connecting hole 68 formed on both sides of the lower portion of the main body portion 61. , 68 are fitted into the projections 44, 44 of the back metal 41, and the projections 44, 44 are caulked to be attached to the back metal 41 of the outer pad 40. In addition to the method described above, the outer shim 60 may be attached only by a plurality of connecting claws, or only by caulking and fixing it by a protrusion, or by attaching it so that it can move relative to the backing plate 41 of the outer pad 40. May be. FIG. 5 is an enlarged view of the end portion of the outer pad 40 to which the outer shim 60 is attached. The anti-rattle portion 62 has a hanging portion 62a along the torque receiving portion 11 of the carrier 10 and a hanging portion 62a below the hanging portion 62a.
A lower surface portion 62b that connects the main body portion 61 to the hanging portion 62b.
An upper surface portion 62c that is bent above a and is in contact with the upper surface of the torque receiving portion 11 is bent in a substantially U-shaped cross section. The extension portion 63 makes elastic contact with the inner surface of the caliper 20 and pushes down the entire pad 40, so that the anti-rattle portion 62 is moved to the torque receiving portion 1.
1 is a spring member for tilting in the circumferential direction of the rotor A with a contact point between the hanging portion 1 and the hanging portion 62a as a fulcrum. In this embodiment, the extension section 6
A case will be described in which a pair of 3, 63 is formed on both sides of the upper portion of the main body 61, but the extension portion 63 may be provided at one or three or more locations in the center of the upper portion of the main body 61. The wear warning piece 65 is provided for the friction member 42 to reach the wear limit, and the tip thereof comes into contact with the rotating rotor A to generate a sliding sound for warning the wear limit. As shown in FIG. If a loopback loop 65a is formed from 61 on the side opposite to the rotor and extends to the wear limit position, the generation of a warning sound becomes clearer. Although FIG. 4 shows the case where the wear warning pieces 65 are provided at two locations on both sides of the lower portion of the main body 61, one location may be provided on one side. As shown in FIG. 7, the holding portion 64 extends from below the main body portion 61 and is bent so as to hold the reaction portion 22 of the caliper 20, and the protrusion 64 a formed at the tip thereof is provided outside the reaction portion 22. The outer pad 40 is engaged with the holding hole 25 formed in the
Is attached to the reaction portion 22. By positioning the holding hole 25 near the vertical center of the outer pad 40,
The outer pad 40 can be elastically attached to the reaction portion 22 without tilting.

[0016]

[Action]

<A> Outer Shim Assembling Operation The outer shim 60 has a connecting claw 67 at the upper center of the main body 61.
Is elastically contacted with the side surface of the pad 40, and the connecting holes 68, 68 of the main body 61 are fitted into the projections 44, 44 of the backing metal 41, and the projections 44, 44 are caulked to be attached to the backing metal 41. The outer pad 40 carries and moves with the outer shim 60 attached.

<B> When assembling the caliper When assembling the caliper 20 or replacing the pad,
The caliper 2 can be operated by simply rotating the caliper 20 around one of the guide pins 30 and 31 that support the caliper 20.
The reaction portion 22 of 0 can freely move in and out between the body portion 61 and the holding portion 64.

<C> During non-braking The outer shim 60 assembled to the disc brake has the extension 63 of which the tip elastically contacts the inner surface of the caliper 20,
The entire outer pad 40 is pushed downward to tilt the anti-rattle parts 62, 62 in the rotor A circumferential direction. Therefore, the torque receiving portion 11 of the carrier 10 generated during braking,
It is possible to prevent impact noise between the torque transmission parts 43, 43 of the outer pad 40 and the torque transmission portion 11 of the outer pad 40, and prevent rattle noise between the caliper 20 and the outer pad 40 due to vehicle vibration.

<D> During braking When braking is performed when the vehicle moves forward or backward, the pads 40 and 50 are pressed against the rotating rotor, and the rotation of the rotor is braked by the frictional resistance. At this time, the outer pad 4
Anti-rattle part 62 externally mounted on the torque transmission part 43 of 0
Slides smoothly on the torque receiving portion 11 of the carrier 10.
Normally, a shim is made of a stainless steel plate in order to have anti-rust property and spring property, so that the sliding part is also prevented from being rusted. Further, during braking, as shown in FIG. 5, the torque transmitting portion 43 of the outer pad 40 and the anti-rattle portion 6 of the outer shim 60 are shown.
Since a gap is formed between the two, the outer pad 40
Moves in a direction to eliminate the gap while deforming the anti-rattle portion 62. This prevents a collision noise when the torque transmission portion 43 of the outer pad 40 collides with the torque receiving portion 11 of the carrier 10. Further, when the braking is released, since the outer pad 40 is elastically attached to the reaction portion 22 by the holding portion 64 of the outer shim 60, the outer pad 40 is reliably separated from the rotor A, and dragging or the like is prevented.

[0021]

Since the present invention is as described above, the following effects can be obtained.

<B> The outer shim main body can suppress the vibration of the pad due to braking to be transmitted to the caliper. Therefore, brake squeal and judder can be effectively prevented.

<B> Since the anti-rattle part is interposed between the torque receiving part of the carrier and the torque transmitting part of the friction pad, the sliding of the pad in the axial direction becomes smooth, and the rust of the sliding part is rusted. It can prevent sticking.

<C> By elastically contacting the tip of the extension with the inner surface of the caliper, the entire pad to which the shim is attached is pushed downward, and the anti-rattle portion is tilted in the rotor circumferential direction. It is possible to prevent the generated shock noise between the torque receiving portion of the carrier and the torque transmitting portion of the pad, and also to prevent the rattle noise during non-braking.

<D> Since the outer pad is elastically attached to the reaction portion by the holding portion, the outer pad is reliably separated from the rotor when the brake is released, and dragging or the like can be prevented. or,
When the caliper is assembled, or when the pad is replaced by rotating the caliper with one guide pin as a fulcrum, the holding part can be attached to the reaction part with one touch. Further, it is possible to prevent the outer pad from falling off due to vibrations caused by transportation before assembling to the vehicle.

<E> When the friction material reaches the wear limit, the tip of the wear warning piece comes into contact with the rotating rotor.
A sliding noise is emitted to warn the wear limit.

<F> By integrating the shims having these functions, the number of parts is reduced, and it is possible to prevent the parts having the respective functions from being forgotten to be assembled, erroneous assembly, falling out, etc., and the assemblability is improved.

[Brief description of drawings]

[Fig. 1] Assembly drawing of outer shim and outer pad

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

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

FIG. 4 is a rear view of the outer pad seen from the reaction portion side of the caliper.

FIG. 5 is a partially enlarged view of the outer pad.

6 is a sectional view of VI-VI in FIG.

7 is a sectional view taken along line VII-VII in FIG.

[Procedure amendment]

[Submission date] September 6, 1993

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be amended] Claims

[Correction method] Change

[Correction content]

[Claims]

[Procedure Amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0011

[Correction method] Change

[Correction content]

[0011]

SUMMARY OF THE INVENTION According to the present invention, a carrier fixed to a non-rotating member of a vehicle is provided with a caliper straddling a part of outer circumference of a disk rotor so as to be slidable in a rotor axial direction by a pair of guide pins. The friction pads of the pair of friction pads are engaged with the carrier in a state where the friction pads are allowed to slide in the axial direction of the rotor, and are inserted between the reaction portion formed on the caliper and the outer pad backing metal facing the reaction portion. In a disc brake having a formed shim, from the main body of the shim attached to the back surface of the outer pad backing metal, extending from both ends in the circumferential direction between the torque receiving portion of the carrier and the torque transmitting portion of the friction pad. The torque of the carrier is formed by forming an anti-rattle part to be inserted and elastically contacting at least one extension part extending outward from the upper part of the shim body part with the inner surface of the caliper. Elastically supporting of the Autapa' de separate component
Was Rutotomoni, bullet said to extend from the bottom of the shim body portion, the holding portion is bent so as to embrace the reacting portion of the caliper, by elastic contact on the outside of the reaction section, the reaction section the outer pad The outer shim mounting structure in the disc brake is characterized by being worn.

Claims (3)

[Claims] 1. A carrier fixed to a non-rotating member of a vehicle is provided with a caliper straddling a part of the outer circumference of a disk rotor so as to be slidable in a rotor axial direction by a pair of guide pins, and a pair of frictions is provided on the carrier. In a disc brake having a shim inserted between the reaction pad formed on the caliper and the outer pad backing which is opposed to the pad, the both ends of the pad in the circumferential direction are engaged with each other while allowing sliding in the axial direction of the rotor, An anti-rattle portion extending from the main body portion of the shim attached to the back surface of the outer pad backing metal to both ends in the circumferential direction and interposed between the torque receiving portion of the carrier and the torque transmitting portion of the friction pad is formed. , At least one extending outward from the top of the shim body
By elastically contacting the two extension parts with the inner surface of the caliper,
A holding portion that elastically supports the torque receiving portion of the carrier and the torque transmitting portion of the outer pad, extends from the lower portion of the shim main body portion, and is bent to hold the reaction portion of the caliper, An outer shim mounting structure for a disc brake, wherein the outer pad is elastically attached to the reaction portion by elastically contacting the outside of the reaction portion. 2. The anti-rattle part of the shim has a hanging part along the torque receiving part of the carrier, a lower surface part connecting the hanging part and the shim body part below the hanging part, and an upper part of the hanging part. The outer shim mounting structure in the disc brake according to claim 1, wherein the outer shim is bent by the upper surface of the torque receiving portion and is in contact with the upper surface of the torque receiving portion. 3. The at least one wear warning piece extending from the main body of the shim to the rotor side so as to extend to the wear limit position of the friction material is formed. Outer shim mounting structure for disc brakes.