JP2561569Y2 - Shim assembly for disc brake - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disk brake shim assembly for eliminating a disk brake squeal phenomenon.

[0002]

2. Description of the Related Art When a disc brake is braked, high-frequency vibration is transmitted to a friction pad which is pressed against a disc rotor, and a noise called a squeal phenomenon is generated. As a countermeasure, a technique for preventing a squeal phenomenon by overlapping two shim plates on the back surface of the friction pad has been proposed.
No. 129343 and Japanese Utility Model Application Laid-open No. Sho 60-41650. The shim plate is composed of an inner shim and an outer shim made of thin steel plate, the inner shim has outward claws for connecting the outer shim formed by bending at multiple points on the periphery, and the outer shim has multiple points on the periphery. It has a bent inward nail for connecting the friction pad. The inner shim is attached to the outer shim and the outer shim is mounted so as to allow a limited relative movement with respect to the friction pad. The squeal phenomenon is suppressed by sliding of the inner shim.

[0003]

[Problems to be solved by the present invention] The above-mentioned conventional techniques for preventing the squealing phenomenon have the following problems.

<A> Since each shim is separated and independent, when assembling to the friction pad, each shim must be separately assembled, which complicates the assembling work.

<B> Since the inner shim does not have claws directly connected to the friction pad, there is a risk that the inner shim may be forgotten when the shim is assembled to the friction pad.

<C> Since the outward claws protrude from the back side of the friction pad, the layout of the pad pressing member is limited. In addition, outward claws protruding behind the friction pad,
There is a problem that the friction pads are not only disturbed but also deformed.

<D> The outer shim is locked to the friction pad,
In the type in which the inner shim relatively moves, the outer shim in contact with the pad pressing member cannot move, so that the occurrence of the squeal phenomenon cannot be reliably prevented.

[0008]

[Object of the present invention] The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide a disk brake shim assembly which is excellent in handleability and has a high effect of suppressing squeal. To provide.

[0009]

According to the present invention , an inner shim and an outer shim are sequentially provided on the back surface of a friction pad for a disc brake.
In the disc brake shim assembly, the connecting claws for attaching the friction pad back plate are formed to protrude in the friction pad direction on the inner shim, and the holding claws are provided on the outer shim.
The outer claws of the outer shim can move relative to each other within a certain limit.
Bend so that it connects to the inner shim on the friction pad side
To lock the inner shim and the inner shim and the outer shim.
A shim assembly for a disc brake, or a friction pad for a disc brake,
A disc brake with the shim and outer shim
In the shim assembly for the brake, the inner shim has a friction pad back plate.
The connecting claws for mounting are formed by protruding in the direction of the friction pad,
Provide a retaining claw on the outer shim and a notch or hole on the inner shim.
The outer claws of the outer shim are bent on the friction pad side.
Can be inserted and removed through a cut or hole in the inner shim,
Insert the shim holding claw through the notch or hole in the inner shim,
Moved in the shim surface direction and locked, and friction on the inner shim
When mounted on the pad, the outer shim cooperates with the friction pad
Relative to the inner shim within certain limits
A shim assembly for a disc brake,
Alternatively, in the shim assembly for a disc brake,
Position where the holding claw of the side shim is stored in the recess of the friction pad
Shim set for disc brake characterized by being formed in
Three-dimensional or the disc brake shim assembly
That the inner shim has a window hole to hold the lubricant
The shim assembly for a disc brake, or
The inner shim and the outer shim
At least one of the side shims is an elastic coating
For disc brakes characterized by being a swinging shim
In the shim assembly.

[0010]

Embodiment 1 The present invention will be described below with reference to the drawings.

<A> Friction Pad FIGS. 1 to 3 show a first embodiment of the present invention. In FIG. 1, reference numeral 1 denotes a well-known friction pad in which a friction material 2 and a back plate 3 are integrated, and are disposed on both sides of a disk rotor (not shown) so as to be able to press against the disk rotor. On the peripheral surface of the back plate 3,
A plurality of connecting grooves 3 for connecting with a shim assembly 4 described later.
a is recessed.

<B> Shim Assembly The shim assembly 4 includes an inner shim 5 and an outer shim 6.

<C> Inner Shim FIG. 2 is an exploded view of the shim assembly 4. The inner shim 5 is a thin plate having substantially the same width as the back plate 3 of the friction pad 1, and has a plurality of connecting claws 5 a bent substantially in an L shape toward the friction pad 1 at the center of the upper edge and both ends of the lower edge. Is formed. The shim plate assembly 4 is attached to the friction pad 1 via the connection claws 5a of the inner shim 5. The formation position and the number of the connection claws 5a are only required to correspond to the connection grooves 3a of the back plate 3, and are not limited to the illustrated formation positions and the formation number. In addition, at both ends of the upper edge of the inner shim 5 and at the center of the lower edge, the base material is extended to a length exceeding the width of the back plate 3, and a holding groove 5 b is formed at the tip of each extension.

<D> Outer Shim The outer shim 6 is a thin plate that allows a certain range of relative movement on the back surface of the inner shim 5 and is superimposed in an inseparable state. A plurality of holding claws 6a are formed by extending the base material at both upper ends and a lower center of the outer shim 6. The width of each holding claw 6a is set smaller than the groove width of the holding groove 5b of the inner shim 5. When each of these holding claws 6a is bent in a substantially L-shape in the same direction (the direction of the friction pad 1) as shown in FIG.
The assembling with the inner shim 5 is easy. The method of assembling the shims 5 and 6 will be described. As shown in FIG. 2, the claws 5 and 6 of the shims 5 and 6 are oriented in the same direction, and the shims 5 and 6 are overlapped. At this time, the holding claws 6 of the outer shim 6
a into the holding groove 5b of the inner shim 5, the end of each holding claw 6a is bent into a substantially U-shape as shown in FIG. Assemble so that relative movement is possible within a certain limit in the plane direction. These two shims 5,
The relative movement of the inner shim 5 in the shim surface direction
Is set to be larger than the width of the holding claws 6a of the outer shim 6, and the distance between the holding claws 6a in the vertical direction of the outer shim 6 is set longer than the distance between the holding grooves 5b of the inner shim 5 in the vertical direction. Can be obtained.

[0015]

Next, the method of mounting the shim assembly and the reason why the squeal phenomenon can be eliminated will be described.

<A> Mounting Method A shim assembly 4 is manufactured by integrating the inner shim 5 and the outer shim 6 as shown in FIG. Then, as shown in FIG. 3, the connection claws 5a of the inner shim 5 are fitted into the connection grooves 3a of the back plate 3, and the shim assembly 4 is assembled to the friction pad 1. Since the claws 5a and 6a of the shim assembly 4 are all bent toward the back plate 3 and there are no protrusions outside the outer shim 6, the pressing member is restricted by the layout in the back side direction of the friction pad 1. Absent. Further, even if the friction pads 1 to which the shim assemblies 4 are assembled are stacked, there is no fear that the claws 5a and 6a are deformed.

<B> Elimination of the squeal phenomenon In the present invention, the pad pressing member is pressed against the outer shim 6 having no direct connection claws on the friction pad 1, and furthermore, between the pressing member and the outer shim 6, and between the shims 5, 6. Allow relative movement within a certain limit. Therefore, even if vibration occurs in the friction pad 1, the vibration can be absorbed by the relative movement between the pressing member and the outer shim 6 and between the two shims 5, 6. Therefore, the effect of preventing the squeal phenomenon is extremely high as compared with the related art.

[0018]

Embodiment 2 FIGS. 4 and 5 show an embodiment in which the connecting positions of both shims constituting the shim assembly are arranged on the back plate of the friction pad. In the present embodiment, the parts corresponding to those in the first embodiment are denoted by the tens digit, and the description thereof is omitted. In this embodiment, the holding groove 15b is provided substantially at the center of both sides of the inner shim 15.
Are formed, and holding claws 16a that bend toward the friction pad 1 are provided at positions corresponding to the holding grooves 15b on both sides of the outer shim 16. The width of the holding claws 16a is set to be smaller than the width of the holding grooves 15b, and the shims 15, 16 are assembled in a state where relative movement within a certain limit is allowed, as in the first embodiment. Further, in this embodiment, the back plate 3
The concave portion 3b is formed at a position where the bent portion of the holding claw 16a can be accommodated. If the existing mold hole for integrally forming the friction material 12 with the back plate 3 is used as the recess 3b, an increase in the number of processing steps can be avoided. According to this embodiment, the inner shim 1
When the shim assembly 14 is mounted on the back plate 3 of the friction pad 1 via the fifth connection claw 15a, the holding claw 16a is accommodated in the recess 3b of the friction pad 1 and does not protrude to the outside. Therefore, since the outer shape of the shim assembly 14 can be accommodated within the outer shape of the friction pad 1, there are few restrictions on the layout and the sliding area of the friction pad 1 can be increased.

[0019]

[Modification 1] FIG. 6 is a cross-sectional view of a friction pad for explaining a modification of the second embodiment. In the modification of FIG. 6, only one holding claw 26 a of the outer shim 26 is formed in a crank shape, and this holding claw 26 a is inserted into a slit 25 c formed at an edge of the inner shim 25 to form the shim assembly 24. This is a modification. The other holding claw 26b of the outer shim 26
The holding groove 25 is bent in a U-shape as in the previous embodiments.
b. Of course, when the shim assembly 24 is mounted on the friction pad 1, the holding claws 26a and 26b are accommodated in the recess 3b, similarly to the second embodiment. The outer shim 26
All of the holding claws may be formed in a crank shape.

[0020]

[Modification 2] FIG. 7 shows another modification of Embodiment 2 in which a holding portion is provided at the center of the plate surface of both shims. In this example, a circular or square holding hole 35c is formed substantially at the center of the inner shim 35 at a position corresponding to the concave portion 3c of the back plate 3. On the other hand, the holding hole 35
A holding claw 36a is formed at the center of the outer shim 36 corresponding to c. Then, the holding claws 36a of the outer shim 36 penetrate into the holding holes 35c of the inner shim 35 and are bent into a substantially U-shape to manufacture the shim assembly 34. In this case, since the holding claws 36a are close to each other, the step of bending into a U-shape can be performed simultaneously. In the case of this example, the inner diameter of the holding hole 35c needs to be set to be larger than the facing distance of the bent portion of the holding claw 36a bent in a substantially U shape in order to allow a certain limit of relative movement of both shims. . Further, the recess 3c of the back plate 3 may be formed by forging or cutting.

[0021]

Embodiment 3 FIG. 8 shows an embodiment in which a lubricant such as grease is sealed between both shims. In this embodiment, a window hole 45d for enclosing a lubricant is formed at an arbitrary position of the inner shim 45, and the window hole 45d is formed.
The lubricant 47 filled in d is closed and sealed by the outer shim 46 and the back plate 3. Therefore, in this embodiment, the window hole 45d
The lubricating agent 47 enclosed in the seal member reduces the sliding contact resistance between the shims 45 and 46, and the squeal prevention effect can be maintained for a long time.

[0022]

Embodiment 4 FIGS. 9 and 10 show an inner shim 55 and an outer shim 56. FIG.
An example is shown in which an integrated shim assembly 54 is formed by superimposing and sliding both shims 55 and 56 along the surface direction. On both sides of the outer shim 56, a holding claw 56a bent in a substantially U-shape protruding in the direction of the friction pad 1 is formed.
Locking claw 56 bent in a substantially L-shape protruding in the same direction as 6a
Form c. These claws 56a and 56c are bent in advance. In addition, holding grooves 55b are provided on both sides of the inner shim 55.
And a notch 55e is formed continuously above the holding groove 55b. The notch 55e allows insertion of the holding claw 56a in the through-surface direction, and the holding groove 55b is set to a size that prevents the holding claw 56a from passing in the through-surface direction. Further, a notch 55f is formed in the center of the lower part of the inner shim 55 to allow the passage of the locking claw 56c. When manufacturing the shim assembly 54, first, the outer shim 56 is superimposed on the inner shim 55 with all the claws oriented in the same direction. Both shims 55, 5
6, the holding claws 56a are inserted through the notches 55e, and the locking claws 56c are inserted through the notches 55f.
The inner shim 55 is lifted upward or the outer shim 5
6 is lowered, and the holding claw 56a is held in the holding groove 55b.
Fit into The shim assembly 54 is attached to the connection groove 3a of the friction pad 1 by the connection claw 55a of the inner shim 55. In this state, the locking claw 56c of the outer shim 56 abuts on the lower edge side surface of the back plate 3 to prevent the outer shim 56 from slipping outward in the circumferential direction (upward in FIG. 9). In the case of the present embodiment, the shim assembly 54 can be easily assembled and disassembled simply by sliding the shims 55 and 56 in the plane direction.

[0023]

[Modification] FIGS. 11 and 12 show a modification of the fourth embodiment. At the center of both ends of the outer shim 66, a holding claw 66a is formed by being bent in a crank shape. On the other hand, a pair of vertical slits 65g are formed in the inner shim 65 in parallel at the position corresponding to the holding claws 66a and downward from the upper edge of the inner shim 65. When the shim assembly 64 is manufactured, the outer shim 66 is dropped from above the inner shim 65, or the inner shim 65 is lifted upward from below the outer shim 66, so that a crank-shaped holding claw is formed in the vertical slit 65g. 66a is fitted.
The radial direction of the outer shim 66 (the vertical direction in FIG. 12 )
Is moved by the holding claws 66 accommodated in the recesses 3 b of the back plate 3.
a is abut against the inner peripheral surface of the concave portion 3b is upward, under the direction
It is regulated by contacting the bottom of the vertical slit 65g .

[0024]

Embodiment 5 In some cases, both the inner shim and the outer shim, or one of the shims, may be coated with an elastic material. As the coating material, for example, a known elastic material that can be expected to have a buffer effect such as rubber can be used. The surface to be coated with the shim may be either the entire surface or one surface. In the present embodiment, the effect of preventing the squeal phenomenon can be significantly improved by the buffering effect of the elastic material in addition to the movement of both shims.

[0025]

[Effects of the present invention] Since the present invention is as described above, the following effects can be obtained.

<A> Since the inner shim and the outer shim are configured as a shim assembly, when assembling both shims to the friction pad, the inner shim can be easily assembled simply by locking the inner shim to the friction pad. In addition, forgetting to assemble the outer shim that is not directly locked to the friction pad can be prevented.

<B> Since the holding claws for regulating the moving range of the outer shim project in the direction of the friction pad, the pressing member is not restricted in the layout in the direction of the back side of the pad, and an optimal layout design can be performed. Further, there is no need to worry about deformation due to handling and stacking of the pad and shim assembly.

<C> Conventionally, the outer shim cannot move relative to the friction pad. However, in the present invention, the outer shim that engages with the friction pad pressing member can be relatively moved. The effect of preventing brake squeals is significantly improved.

<D> The lubricating material is sealed between the outer shim and the back plate of the friction pad, so that the outer shim moves smoothly.
The effect of preventing the squeal phenomenon can be maintained for a long time.

<E> Since at least one of the inner shim and the outer shim is coated with an elastic material, the effect of preventing the squeal phenomenon can be significantly improved due to the buffering effect of the elastic material in addition to the movement of both shims. .

[Brief description of the drawings]

FIG. 1 is an exploded view of a shim assembly according to a first embodiment.

FIG. 2 is an assembly diagram of a shim assembly.

FIG. 3 is a longitudinal sectional view of the center of the friction pad when the shim assembly is mounted.

FIG. 4 is a front view of a shim assembly according to a second embodiment.

FIG. 5 is a sectional view taken along line vv in FIG. 4;

FIG. 6 is a partially enlarged view of the center of a shim assembly according to a first modification of the second embodiment cut in a transverse direction.

FIG. 7 is a partially enlarged view of the center of a shim assembly according to a second modification of the second embodiment cut in a transverse direction.

FIG. 8 is an enlarged partial cross-sectional view of a shim assembly according to a third embodiment.

FIG. 9 is an exploded view of the shim assembly according to the fourth embodiment.

FIG. 10 is a partially enlarged view showing an assembled state of a shim assembly according to a fourth embodiment.

FIG. 11 is an exploded view of a shim assembly according to a modification of the fourth embodiment.

FIG. 12 is a partially omitted front view showing an assembled state of a shim assembly according to a modification of the fourth embodiment.

 ──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-63-308232 (JP, A) JP-A-61-140231 (JP, U) JP-A-60-58938 (JP, U) 25736 (JP, U) Fully open sho 64-32940 (JP, U) Fully open sho 62-45436 (JP, U) Fully open sho 56-70236 (JP, U) Fully open flat 3-32224 (JP, U) Hikaru Hei 3-112143 (JP, U) Jiko 62-33145 (JP, Y2)

Claims (5)

(57) [Scope of request for utility model registration] (1) An inner surface of a friction pad for a disc brake is provided on a back surface thereof .
In the shim assembly for a disc brake , in which the side shim and the outer shim are sequentially stacked and attached, a connecting claw for mounting a friction pad back plate is formed on the inner shim so as to protrude in the direction of the friction pad, and a holding claw is provided on the outer shim , The outer shim holding claws can move relative to each other within a certain limit.
Fold it to the inner shim on the friction pad side
A shim assembly for a disc brake, wherein the shim is engaged with an inner shim and the inner shim and the outer shim are integrated . 2. An inner side of a friction pad for a disc brake .
In a disk brake shim assembly in which a side shim and an outer shim are sequentially stacked and attached, a connecting claw for mounting a friction pad back plate is formed on the inner shim so as to protrude toward the friction pad, and a holding claw is provided on the outer shim. Notches or holes are provided in the inner shim, and the holding claws of the outer shim are bent on the friction pad side.
It can be inserted and removed from the side shim notch or hole, and the outer shim holding claw can be inserted through the inner shim notch or hole.
To move in the shim surface direction and locked, and remove the inner shim.
When mounted on the friction pad, it cooperates with the friction pad and
Move relative to the inner shim within certain limits
Characterized that you have to shim assembly for a disc brake. 3. A disk according to claim 1, wherein
In the shim assembly for the brake, the holding claws of the outer shim, characterized by being formed at a position which is received in the recess of the friction pad, the shim assembly for a disc brake. 4. A disk according to claim 1, wherein
Characterized in shim assembly for braking, that it has drilled window hole to hold the lubricant inside shim
A shim assembly for a disc brake. 5. A disk according to claim 1, wherein
A shim assembly for a disc brake, wherein at least one of the inner shim and the outer shim is an elastic material coated shim.