JP4747577B2 - Disc brake - Google Patents

Description

  The present invention relates to a disc brake used in a vehicle such as an automobile.

As an example of a conventional disc brake used in an automobile, there is a disc brake disclosed in Patent Document 1. The disc brake of Patent Document 1 is a shim plate composed of an inner shim plate and an outer shim plate each having a flat plate portion to be overlaid. The inner shim plate and the inner shim plate The outer shim plate is formed so that claw portions bent so as to face the outer peripheral surface of the back metal from each flat plate portion overlap each other, and the claw portions of the inner shim plate are in contact with the outer peripheral surface of the back metal. The inner shim plate is configured by coating an elastic material such as a rubber material or a synthetic resin material on both surfaces of a thin metal plate. In this disc brake, the claw portion of the inner shim plate and the claw portion of the outer shim plate are formed by bending from each flat plate portion, and the combined shape of the flat plate portion and the claw portion has a substantially letter-shaped cross section. .
Japanese Utility Model Publication No. 5-19686

  By the way, in the above-described prior art, the outer shim plate may vibrate relatively with respect to the inner shim plate in accordance with braking and releasing operation thereof. In this case, when a force in the direction of the claw portion acts along the surface of the flat plate portion from the flat plate portion of the outer shim plate along with the vibration, as described above, the claw portion of the inner shim plate and the claw portion of the outer shim plate Since the flat plate portion and the claw portion are formed in a bent shape from each flat plate portion, the claw portion of the inner shim plate moves the claw portion of the outer shim plate. Does not work to suppress. For this reason, the outer shim plate and the inner shim plate are easily displaced by the vibration acting on the outer shim plate.

  The actual situation is that the occurrence of such deviation between the outer shim plate and the inner shim plate is desired to be avoided in order to maintain the noise suppressing function such as brake noise of the shim plate satisfactorily.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a disc brake that can suppress the occurrence of displacement of the outer shim plate and the inner shim plate.

The invention according to claim 1 is a disc brake in which a shim plate is mounted on a friction pad that is arranged opposite to a disc and has a lining fixed to the surface side of the back metal, the shim plate being a back plate of the friction pad. Ri Do from the inner shim plate and the outer shim plate having a flat plate portion that is assembled to overlap on the back side, respectively, engaging in each of the back metal by bent claw portion so as to face the outer peripheral surface of the back metal from the flat plate portion is, the claw portion of the claw portion and the outer shim plate of the inner shim plate includes a projection projecting from the flat plate portion in a direction away from the back side of the front Symbol backing, the projecting portion on the surface side direction of the back metal Bending extension portions that are bent and extend to the outer peripheral surface of the back metal, the claw portions overlap each other, and the protruding portion of the inner shim plate and the protruding portion of the outer shim plate are on the surface of the flat plate portion. this is brought into contact along the direction The features.
According to a second aspect of the present invention, in the disc brake according to the first aspect, the protruding portion is formed by being bent from the flat plate portion .

According to the first and second aspects of the invention, the outer shim plate vibrates relative to the inner shim plate along with the braking and releasing operation thereof, and the flat plate portion of the outer shim plate moves along with the vibration. If the surface claw portion direction of the force along the parts is applied, the force acting on the outer shim plate, it means for supporting the receiving projecting portion of the inner shim plate, the outer shim plate, the The movement is suppressed by the protruding portion and the protruding portion of the inner shim plate, and as a result, displacement of the outer shim plate and the inner shim plate can be suppressed .

Hereinafter, a disc brake according to an embodiment of the present invention will be described with reference to the drawings.
In FIG. 1, a disc brake 1 has a disc 2 that rotates together with the wheels (not shown) of an automobile. An attachment member 3 is attached to a non-rotating portion on the inner side (right side in FIG. 1) of the disk 2 in the automobile. The mounting member 3 is provided with a pair of arm portions (not shown) extending in the axial direction of the disk 2 (left and right in FIG. 1) so as to straddle the outer peripheral side of the disk 2.

  The pair of arms are connected by a connecting portion 4 on the outer side (left side in FIG. 1) of the disk 2. A caliper 5 is slidably supported on each of the pair of arms via a slide pin (not shown). The caliper 5 includes a caliper main body 6 disposed on the inner side of the disc 2, a bridge portion 7 extending from the caliper main body 6 across the outer periphery of the disc 2 to the outer side, and a distal end side of the bridge portion 7. And a caliper claw portion 8 that is bent and extended inward in the radial direction of the disk 2 and disposed on the outer side of the disk 2.

  A space 9 formed between the caliper main body 6 and the caliper claw 8 is disposed on the outer peripheral side of the disc 2 and on both sides (inner side, outer side) of the disc 2 so as to sandwich the disc 2. The friction pads 10 and 10 are arranged. A cylinder bore 11 is formed in the caliper body 6, and a piston 12 is slidably inserted into the cylinder bore 11.

As shown in FIGS. 1 to 4, each friction pad 10, 10 is composed of a plate-like back metal 13 and a lining 14 that is fixed to the surface 13 A side of the back metal 13 and faces the disk 2. It has a substantially fan shape extending in the direction.
On the back surface 13B side where the lining 14 of the back metal 13 is not fixed, a shim plate 15 having a substantially fan shape so as to be substantially along the friction pad 10 is mounted. The shim plate 15 includes an inner shim plate 16 and an outer shim plate 17 each having a flat plate portion having a substantially equivalent shape (substantially fan shape) to be superposed. The flat plate of the inner shim plate 16 is attached to the back metal 13 of the friction pad 10. The portion 16A is overlapped and assembled to the back metal 13.
The inner shim plate 16 is formed by coating a steel plate (not shown) or the like with a member (not shown) having a high friction coefficient such as hard rubber or resin. The outer shim plate 17 is made of a rust-proof metal plate having spring properties such as stainless steel.

  A claw portion (hereinafter referred to as the following) that is bent from the flat plate portion 16A to the outer peripheral surface 13C of the back metal 13 is provided on the inner peripheral side portion (lower side in FIG. 2, lower side in FIG. 4) of the flat plate portion 16A of the inner shim plate 16. Two inner shim plate inner peripheral claw portions 20 are formed at a distance in the circumferential direction. Further, the substantially central portion of the outer peripheral side portion (upper side of FIG. 2, upper side of FIG. 4) of the flat plate portion 16A of the inner shim plate 16 is bent at a substantially right angle so as to face the outer peripheral surface 13C of the back metal 13 from the flat plate portion 16A. A claw portion (hereinafter referred to as an inner shim plate outer peripheral side claw portion 21) is formed. The center side portion of the inner shim plate outer peripheral side claw portion 21 comes into contact with the outer peripheral surface 13 </ b> C of the back metal 13.

The inner shim plate inner circumferential claw portion 20 is bent (bent with bending) in a direction opposite to the back plate 13 from the flat plate portion 16A (a direction away from the back surface 13B of the back plate 13; diagonally lower right in FIG. 4). ) A protruding protrusion (hereinafter referred to as an inner shim plate protrusion 22), and an outer peripheral surface 13C of the back metal 13 which is curved from the inner shim plate protrusion 22 in the direction of the back metal 13 (extends to the left in FIG. 4). And a bending extension part (hereinafter referred to as an inner shim plate bending extension part 23). The inner shim plate bending extension portion 23 faces the outer peripheral surface 13 </ b> C of the back metal 13. The inner shim plate bending extension part 23 is in contact with the outer peripheral surface 13 </ b> C of the back metal 13 at an intermediate portion thereof, and the front end part is bent from the contact part to face the outer peripheral surface 13 </ b> C of the back metal 13.
The inner shim plate protrusion 22 and the inner shim plate bending extension 23 are bent in a substantially inverted S shape (substantially S shape from the other side of FIG. 4), and have a three-stage bending structure including the flat plate portion 16A. It has become.

On the inner peripheral side portion (lower side in FIG. 2, lower side in FIG. 4) of the flat plate portion 17 </ b> A of the outer shim plate 17, the inner shim plate inner peripheral claw portion 20 overlaps, and from the flat plate portion 17 </ b> A to the outer peripheral surface 13 </ b> C of the back plate 13. Two claw portions (referred to as outer shim plate inner circumferential claw portions 25) bent so as to face each other are formed so as to overlap the inner shim plate inner circumferential claw portion 20.
The outer shim plate inner peripheral side claw portion 25 includes an outer shim plate protruding portion 26 formed corresponding to the inner shim plate protruding portion 22 and an outer shim plate formed corresponding to the inner shim plate bending extension portion 23. A bending extending portion 27.
The outer shim plate protrusion 26 and the outer shim plate bending extension portion 27 are bent in a substantially inverted S shape (substantially S shape from the other side of FIG. 4), and have a three-stage bending structure including the flat plate portion 17A. It has become.

On the outer peripheral side portion (upper side in FIG. 2, upper side in FIG. 4) of the flat plate portion 17 </ b> A of the outer shim plate 17, a claw portion (hereinafter referred to as “between the flat plate portion 17 </ b> A”) is bent at a substantially right angle so The outer shim plate outer peripheral side claw portion 28 is formed in close contact with and overlapped with the inner shim plate outer peripheral side claw portion 21.
Further, a bent portion 29 whose tip side comes into contact with the outer peripheral surface 13 </ b> C of the back metal 13 is formed at both ends of the outer peripheral side portion (upper side in FIG. 2, upper side in FIG. 3) of the flat plate portion 17 </ b> A of the outer shim plate 17.

  In the disc brake 1 configured as described above, the outer shim plate 17 vibrates relative to the inner shim plate 16 along with the braking and releasing operation thereof, and from the flat plate portion 17A of the outer shim plate 17 accompanying the vibration. When a force in the direction of the outer shim plate inner circumferential claw 25 along the surface of the flat plate portion 17 </ b> A (hereinafter referred to as a force along the surface) acts on the outer shim plate 17, it acts on the outer shim plate 17. This force (force in the direction along the surface) is received and supported by the inner shim plate protrusion 22 of the inner shim plate 16. For this reason, the movement of the outer shim plate 17 is suppressed by the inner shim plate protrusion 22 of the inner shim plate 16, and consequently the displacement of the outer shim plate 17 and the inner shim plate 16 can be suppressed. Furthermore, since the deviation of the outer shim plate 17 and the inner shim plate 16 can be suppressed in this way, the noise suppressing function such as brake noise of the shim plate 15 can be maintained well.

  In the above embodiment, the projecting portions (the inner shim plate projecting portion 22 and the outer shim plate projecting portion 26) are curved and projecting from the flat plate portions 16A and 17A, and the bent extending portions (the inner shim plate bending extending portion 23 and the outer projecting portion). The case where the shim plate bending extension portion 27) is curved and extended from the protruding portions (the inner shim plate protruding portion 22 and the outer shim plate protruding portion 26) is taken as an example, but the present invention is not limited to this. . For example, as shown in FIG. 5, the projecting portions (inner shim plate projecting portion 22B and outer shim plate projecting portion 26B) project so as to be bent from the flat plate portions 16A and 17A (formed with an edge), and bend extending portions. The inner shim plate bending extension portion 23B and the outer shim plate bending extension portion 27B are extended so as to be bent from the protrusion portions (the inner shim plate protrusion portion 22B and the outer shim plate protrusion portion 26B). (Second embodiment).

According to the second embodiment, it becomes possible for the protruding portion of the inner shim plate 16 (the inner shim plate protruding portion 22B) to reliably receive the force in the direction along the surface acting on the outer shim plate 17, The effect of suppressing the displacement of the outer shim plate 17 and the inner shim plate 16 can be further improved.
Further, only one of the protruding portions (the inner shim plate protruding portion 22B and the outer shim plate protruding portion 26B) and the bending extension portion (the inner shim plate bending extension portion 23B and the outer shim plate bending extension portion 27B) is bent ( It may be configured to have an edge).

  In the above embodiment, the case where the middle portion of the bent extension portion (inner shim plate bent extension portions 23 and 23B) of the inner shim plate 16 contacts the outer peripheral surface 13C of the back metal 13 is taken as an example. However, the present invention is not limited to this, and the distal end portion of the bent extension portion of the inner shim plate 16 may be in contact with the outer peripheral surface 13 </ b> C of the back metal 13.

In the above embodiment, the inner shim plate outer peripheral side claw portion 21 and the outer shim plate outer peripheral side claw portion 28 are in contact with the root of the caliper claw portion 8 if a protruding portion is provided in this portion. The inner shim plate inner peripheral side, the outer shim plate inner peripheral side claw portions 20 and 25 have protrusions and bent extending portions (inner shim plate, outer shim plate protrusions 22 and 26 and inner shim plate, outer shim plate bending Although the case where the extending portions 23 and 27) are not provided is taken as an example, instead of this, the protruding portions and the bending extending portions (inner shim plate inner peripheral side, outer shim plate inner peripheral claw portions 20 and 25) ( The inner shim plate, the outer shim plate protrusions 22, 26 and the inner shim plate, the outer shim plate bending extension portions 23, 27) may be provided so as to have a protruding portion and a bending extension portion.
The inner shim plate inner peripheral side, the outer shim plate inner peripheral side claw portions 20 and 25 have protrusions and bent extending portions (inner shim plates, outer shim plate protrusions 22B and 26B, inner shim plates, outer shim plates You may comprise so that the protrusion part and bending extension part similar to the bending extension parts 23B and 27B) may be provided.

It is sectional drawing which shows the disc brake which concerns on 1st Embodiment of this invention. It is a front view which shows the shim board of FIG. It is a rear view which shows the shim board and friction pad of FIG. FIG. 4 is a cross-sectional view taken along line AA of FIG. 3 showing the shim plate and the friction pad of FIG. 1. It is sectional drawing which shows the shim board and friction pad in the disc brake which concern on 2nd Embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Disc brake, 15 ... Shim board, 16, 17 ... Inside, outer shim board, 16A, 17A ... Flat plate part, 20 ... Inner shim board inner peripheral side claw part, 22, 22B ... Inner shim board protrusion part, 23, 23B: Inner shim plate bending extension portion, 25: Outer shim plate inner peripheral side claw portion, 26, 26B: Outer shim plate protruding portion, 27, 27B ... Outer shim plate bending extension portion.

Claims (2)

A disc brake in which a shim plate is mounted on a friction pad disposed opposite to the disc and having a lining fixed to the surface side of the back metal,
The shim plate is bent Ri Do from the inner shim plate and the outer shim plate having a flat plate portion that is assembled to overlap on the back side of the backing metal of the friction pad, respectively, from the flat plate portion so as to face the outer peripheral surface of the back metal Each of the claw portions is locked to the back metal,
Claw portions of the claw portion and the outer shim plate of the inner shim plate is bent a projection projecting in a direction away from the back side of the front Symbol backing from the flat plate portion, from the projecting portion on the surface side direction of the back metal includes an extending portion bending and extending to the outer peripheral surface of the back metal Te, respectively, the claw portions overlap, the the protruding portions of the inner shim plate and the protrusion of the outer shim plate along the surface of said plate Disc brake characterized by contacting in the direction . The disc brake according to claim 1, wherein the projecting portion is curved from the flat plate portion .

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