JP4432446B2 - Disc brake - Google Patents

Description

  The present invention relates to a disc brake. In particular, the pad has a guide portion at the edge in the circumferential direction of the disk, and the guide portion is supported by the support portion formed on the mount so as to be movable in the disk axial direction and is prevented from coming off in the disk radial direction. Disc brakes

Conventionally, disc brakes having various configurations are known. For example, the disc brake according to Patent Document 1 has convex guide portions at both ends of the pad in the disc rotation direction. And the guide part is supported by the concave support part formed in the mount so that a movement to a disk axial direction is possible. Also, a support member is provided between the pad and mount members to prevent the two members from being scraped by preventing both members from directly striking.
The support member has an upper support piece that comes into contact with the upper end surface (the outer surface in the disk radial direction) of the pad and a lower support piece that comes into contact with the lower end surface of the pad (the central side surface in the disk radial direction). . The upper support piece and the lower support piece are configured to urge each of the upper end surface and the lower end surface of the pad in a direction away from the disk.
Therefore, the pad was stably separated from the disk by the upper support piece and the lower support piece. Therefore, a drag phenomenon (a phenomenon in which the pad slides on the disk during non-braking) is effectively prevented.
Japanese Utility Model Publication No. 5-10832

However, the pad according to Patent Document 1 has an upper surface and a lower surface that are supported by the upper support piece and the lower support piece of the support member, respectively. It may be tilted by the friction force. When tilted, the pad guide may be twisted with respect to the mount support. That is, the guide part and the support part may contact at two or more points via the support member, and the posture of the pad may be determined by these contact points. In some cases, the brake squeal may occur due to the twisting of the guide portion and the support portion.
Accordingly, an object of the present invention is to provide a disc brake that can effectively prevent the pad guide portion and the mount support portion from being twisted.

In order to solve the above-mentioned problems, the present invention is a disc brake having a configuration as described in each claim.
According to the first aspect of the present invention, the plurality of elastic bodies are provided between the guide portion and the support portion. One elastic body biases the guide portion toward the disk center side, and the other elastic body biases the guide portion toward the disk outer peripheral side.
That is, the guide part is urged to both sides in the disk radial direction by at least two elastic bodies. And these elastic bodies are provided between the guide part and the support part.
Therefore, when the pad receives a frictional force from the disk during braking and receives a force in a direction in which the guide portion tilts with respect to the support portion, the guide portion is returned to the original posture position by the cooperation of the two elastic bodies. Further, the elastic body is provided between the guide portion and the support portion. Therefore, the guide part is reliably and strongly separated from the support part by the elastic body. Thus, twisting of the guide portion and the support portion can be reliably and strongly prevented by the elastic body.

According to the first aspect of the present invention, the outer elastic body is installed in an elastically deformed state between the outer peripheral side surface of the support portion on the outer peripheral side of the disk and the guide outer surface of the guide portion. The inner elastic body is installed in an elastically deformed state between the inner peripheral side surface and the guide inner surface of the guide portion.
Further in accordance to the invention described in claim 1, the outer elastic bodies and the inner elastic member, by biasing the guide portion in an oblique direction having a component in the disk radial direction and the disk separation direction, the disk radial direction of the guide portion At the same time, it is urged in the disc separation direction.
Therefore, when the guide portion is biased by the elastic body, the pad is biased in a direction away from the disk. As a result, the pad is separated from the disk during non-braking.

According to the second aspect of the present invention, the urging direction of the outer elastic body is inclined in the disc separating direction from the urging direction of the inner elastic body. According to the invention described in claim 3, the elastic coefficient of the outer elastic body is larger than the elastic coefficient of the inner elastic body.
Therefore, the pad is more spaced from the disk on the outer periphery side of the disk than on the center side of the disk.
By the way, the “scratch phenomenon” can occur when the disc is attached obliquely to the vehicle as shown in FIG. In this case, the disk is likely to be in sliding contact with the outer peripheral side of the pad.
On the other hand, in the pad according to the present invention, the outer peripheral side of the disk is more separated from the disk than the center side of the disk. Therefore, the pad can be suitably separated from the disk, and the drag phenomenon can be suitably prevented.

According to the fourth aspect of the present invention , the inclined surface is provided on a part of the guide portion biased by the outer elastic body and the inner elastic body.

  According to the present invention, it is possible to effectively prevent the pad guide portion and the mount support portion from being twisted.

(Embodiment 1)
A first embodiment of the present invention will be described with reference to FIGS.
As shown in FIG. 1, the disc brake 1 is a floating disc brake and has a pair of pads 4, a mount 2, and a caliper 3. A support member 5 is provided between the pad 4 and the mount 2 as shown in FIG.
As shown in FIG. 1, the mount 2 is attached to the vehicle, and supports the pads 4 one by one on the vehicle inner side and the vehicle outer side of the disk D.

The caliper 3 is attached to the mount 2 via a slide pin 10. The slide pin 10 is slidably attached to the mount 2. Therefore, the caliper 3 is supported by the slide pin 10 so as to be movable in the disk axial direction with respect to the mount 2.
As shown in FIG. 3, the caliper 3 has a piston 30 on the inner side and a claw 31 on the outer side. The piston 30 presses the inner pad 4 against the disk D. Then, the caliper body moves to the inside of the vehicle by the reaction force, and the claw 31 moves together with the caliper body. Thereby, the claw 31 presses the pad 4 on the outer side against the disk D.

The pad 4 has a friction material 40 and a back plate 41 as shown in FIG.
The friction material 40 is pressed against the disk D and slidably contacts the disk D, thereby applying a frictional force to the disk D.
The back plate 41 is made of metal or resin, and is attached to the back surface of the friction material 40. The back plate 41 has guide portions 42 and press receiving portions 43 and 44 at both ends in the disk rotation direction, that is, at the edges of the disk delivery side (left side in FIG. 2) and the disk delivery side (right side in FIG. 2). have.

As shown in FIG. 2, the guide portion 42 protrudes in the disk rotation direction R from one end edge of the back plate 41. That is, it is formed in a convex shape. The guide portion 42 is inserted into the concave support portion 20 formed on the mount 2. Therefore, the guide portion 42 is prevented from coming off in the disk radial direction N by the support portion 20.
The support portion 20 extends in the disk axial direction (the thickness direction of the pad 4). Therefore, the guide part 42 is supported by the support part 20 so as to be movable in the disk axial direction.
Moreover, the guide part 42 is provided in the position corresponding to the centroid 45 of the pad 4 as shown in FIG. That is, it is provided on an orthogonal line orthogonal to a line connecting the centroid 45 of the pad 4 and the axis center of the disk D, in other words, on the disk rotation tangent 46 in the centroid of the pad 4.

As shown in FIG. 2, the outer pressure receiving portion 43 is provided on the outer peripheral side of the disc with respect to the guide portion 42. On the other hand, the inner pressure receiving portion 44 is provided closer to the center of the disc than the guide portion 42. The press receiving portions 43 and 44 are provided at positions sandwiching the guide portion 42, and are provided at positions adjacent to the guide portion 42.
The outer press receiving portion 43 and the inner press receiving portion 44 are formed on the same plane (on the same straight line). The plane is preferably a plane parallel to a line 47 connecting the centroid 45 and the center of the disk and perpendicular to the thickness direction of the pad 4.

The mount 2 has support portions 20 on both sides in the disk rotation direction R as shown in FIG. An outer support receiving surface 21 is provided on the outer peripheral side of the disc with respect to the support portion 20, and an inner support receiving surface 22 is provided on the disc center side with respect to the support portion 20.
The support receiving surfaces 21 and 22 receive surface pressure (pressing) from the pressure receiving portions 43 and 44 of the pad 4 through the support member 5 when the pad 4 moves in the disk rotation direction R.
The outer support receiving surface 21 and the inner support receiving surface 22 are formed on the same plane. On the other hand, as described above, the pressure receiving portions 43 and 44 on the pad 4 side are also formed on one plane. Accordingly, even when the pad 4 is displaced in the disk radial direction N with respect to the mount 2, the pressure receiving portions 43 and 44 can reliably receive the pressure against the support receiving surfaces 21 and 22.

The plane having the support receiving surfaces 21 and 22 is preferably a plane parallel to a line 47 connecting the centroid 45 and the center of the disk and perpendicular to the thickness direction of the pad 4.
Thereby, the support receiving surfaces 21 and 22 can stably regulate the movement of the pad 4 in the disk rotation direction R. That is, when the pad 4 comes into sliding contact with the disk D, the pad 4 moves in the direction of the disk rotation tangent 46 at the centroid 45. The support receiving surfaces 21 and 22 are orthogonal to the moving direction. Thus, the movement of the pad 4 in the disk rotation direction R can be restricted from the front in the movement direction. Therefore, it is possible to prevent the rotational force (torque) from being generated in the pad 4 when the movement of the pad 4 is restricted.

Further, a clearance C is formed between the guide portion 42 and the support portion 20 (pad 4 and mount 2) as shown in FIG. The clearance C is provided with a support member 5 that prevents the two members from directly contacting each other, thereby preventing the two members from being scraped.
As shown in FIG. 4, the support member 5 is formed of a leaf spring, and integrally includes pressure receiving surfaces 50 and 54, insertion surfaces 51 and 53, a connection surface 52, and elastic bodies 60 and 61. .

One pressing receiving surface 50 is disposed between the pressing receiving portion 43 and the support receiving surface 21 as shown in FIG. The other pressure receiving surface 54 is installed between the pressure receiving portion 44 and the support receiving surface 22. When the pad 4 is moved in the disc rotation direction R, the press receiving surfaces 50 and 54 are sandwiched between the press receiving portions 43 and 44 and the support receiving surfaces 21 and 22, respectively. The surfaces 21 and 22 are interviewed.
The insertion surfaces 51 and 53 are erected on one end edge of the pressure receiving surfaces 50 and 54 as shown in FIG. And the insertion surfaces 51 and 53 are extended toward the bottom face 20b of the support part 20 from the press receiving surfaces 50 and 54, as shown in FIG.

The one insertion surface 51 is arranged in parallel with the outer peripheral side surface 20a constituting the surface of the support portion 20 on the outer peripheral side of the disk. And between the insertion surface 51 and the guide outer surface 42a of the guide part 42 at the disk outer periphery side, the elastic body 60 is installed in a state of being elastically deformed. Therefore, the guide outer surface 42a is urged toward the disk center by the elastic body 60 (inner-biased elastic body).
The other insertion surface 53 is juxtaposed with the inner peripheral side surface 20c constituting the surface of the support portion 20 on the disk center side. Between the insertion surface 51 and the guide inner surface 42b on the disc center side of the guide portion 42, an elastic body 61 is installed in a state of being elastically deformed. Therefore, the guide inner surface 42b is urged toward the outer peripheral side of the disk by the elastic body 61 (an elastic body biased outside).

As shown in FIG. 4, the elastic bodies 60 and 61 integrally have curved portions 60a and 61a and elastic pieces 60b and 61b.
The curved portions 60a and 61a extend in a curved shape from one end side of the insertion surfaces 51 and 53 and extend so as to be folded back to the insertion surfaces 51 and 53 side. The elastic pieces 60b and 61b extend toward the insertion surfaces 51 and 53 (disc D) from the tips of the curved portions 60a and 61a. As shown in FIG. 6, the elastic pieces 60 b and 61 b extend obliquely with respect to the insertion surfaces 51 and 53, and have inclination angles 60 c and 61 c with respect to the insertion surfaces 51 and 53.

As shown in FIGS. 5 and 6, the elastic bodies 60 and 61 are elastically deformed when the guide portion 42 is inserted between the elastic bodies 60 and 61. The bending portions 60a and 61a are elastically deformed in a direction in which the curvature decreases as the amount of the guide portion 42 inserted toward the disk D increases. Then, the elastic pieces 60b and 61b are elastically deformed in a direction in which the interval between the pieces gradually expands.
Therefore, the amount of elastic deformation of the elastic bodies 60 and 61 increases as the amount of the guide portion 42 inserted toward the disk D increases. Therefore, the elastic bodies 60 and 61 urge the guide portion 42 in a direction away from the disk D.
In other words, an urging structure is provided between the elastic bodies 60 and 61 and the guide portion 42 to urge the guide portion 42 in the direction of separating from the disk D by the elastic force of the elastic bodies 60 and 61.

  Further, the inclination angle 60c of the elastic piece 60b is larger than the inclination angle 61c of the elastic piece 61b as shown in FIG. Therefore, the elastic piece 60b urges the guide portion 42 in a direction in which the guide portion 42 is separated from the disk D stronger than the elastic piece 61b. As a result, the guide outer surface 42a side is separated from the disk D more than the guide inner surface 42b side. Then, as shown in FIG. 7, the pad 4 is separated from the disk D while being tilted in the disk separation direction (pad 4 thickness direction), and the disk outer peripheral side is separated more than the disk center side.

As shown in FIG. 2, the connection surface 52 connects the distal ends of the insertion surfaces 51 and 53 to each other. And the connection surface 52 is installed in parallel with respect to the bottom face 20b of the support part 20 because the support member 5 is installed in the support part 20. As shown in FIG.
Further, as shown in FIG. 4, two attachment portions 55 and 56 extending toward the support portion 20 are provided on the connection surface 52. The support members 5 are attached to the mount 2 by attaching the attachment portions 55 and 56 to the mount 2 (see FIG. 2).

The disc brake 1 is configured as described above.
That is, the guide portion 42 is urged to both sides in the disk radial direction by two elastic bodies 60 and 61 as shown in FIG. These elastic bodies 60 and 61 are provided between the guide portion 42 and the support portion 20.
Therefore, when the pad 4 receives a frictional force from the disk D during braking and the guide portion 42 receives a force inclined to the support portion 20, the guide portion 42 is caused to cooperate by the cooperation of the two elastic bodies 60 and 61. It is returned to the original posture position. Further, the elastic bodies 60 and 61 are provided between the guide portion 42 and the support portion 20. Therefore, the guide part 42 is reliably and strongly separated from the support part 20 by the elastic bodies 60 and 61. Thus, the twisting of the guide portion 42 and the support portion 20 can be reliably and strongly prevented by the elastic bodies 60 and 61.

Further, the guide portion 42 is also urged in the direction away from the disk D by the elastic bodies 60 and 61 as shown in FIG.
Therefore, the guide portion 42 is urged by the elastic bodies 60 and 61, so that the pad 4 is urged away from the disk D. As a result, the pad 7 is separated from the disk D during non-braking.

5 and 6, when the pad 4 is separated from the disk D as shown in FIGS. 5 and 6, the guide portion 42 is made of an elastic body so that the outer circumferential side of the pad 4 is separated from the disk center side. It is configured to be energized.
Therefore, as shown in FIG. 7, the pad 4 is more separated from the disk on the outer periphery side of the disk than on the center side of the disk.
By the way, the “scratch phenomenon” may occur when the disk D is attached obliquely to the vehicle. In this case, the disk D is likely to be in sliding contact with the outer peripheral side of the pad 4.
On the other hand, the pad 4 according to the present embodiment is more separated from the disk on the outer periphery side of the disk than on the center side of the disk. Therefore, the pad 4 can be suitably separated from the disk D, and the drag phenomenon can be suitably prevented.

Further, a support member 5 is provided between the guide part 42 and the support part 20 as shown in FIG. 2 to prevent the two members from coming into contact with each other by preventing them from directly contacting each other. . The support member 5 is integrally provided with elastic bodies 60 and 61 (see FIG. 4).
Therefore, an increase in the number of parts due to the elastic bodies 60 and 61 can be prevented. In addition, the elastic bodies 60 and 61 can be assembled together with the support member 5 on the mount 2 side.

Further, as shown in FIG. 2, two press receiving portions 43 and 44 are formed at one end edge of the pad 4 on the disk delivery side. When the pad 4 moves in the disc rotation direction R, the two press receiving portions 43 and 44 are pressed from the mount 2 side.
Therefore, the pad 4 can receive two presses from the same edge side. And since these presses arise in the same edge side, they hardly produce a couple. Therefore, it is possible to suppress the torque from being generated in the pad 4. Therefore, the force with which the pad 4 is pressed against the mount 2 is smaller than that of the conventional structure that actively generates torque.
Thus, the dynamic friction force when the pad 4 moves in the disk axial direction is smaller than that of the conventional structure. Therefore, the pad 4 is easy to move in the disk axis direction with respect to the mount 2. Further, since the movement of the pad 4 in the disc rotation direction R is regulated by the two press receiving portions 43 and 44, the movement in the disc rotation direction R can be regulated stably.

Furthermore, this form has the some elastic body 60,61 which urges | biases the guide part 42 between the guide part 42 and the support part 20. FIG.
Therefore, when the guide portion 42 receives a force in a direction tilting with respect to the support portion 20, the guide portion 42 is biased in a direction to return to the original posture position by the cooperation of the two elastic bodies 60 and 61. . Therefore, the pad 4 is prevented from being tilted by the elastic bodies 60 and 61. Thus, the pad 4 can be reliably pressed from the mount 2 side by the two press receiving portions 43 and 44 formed on the same edge.

(Embodiment 2)
The second embodiment will be described with reference to FIG.
The second embodiment is formed in substantially the same manner as the first embodiment. However, the second embodiment is different from the first embodiment in that it has elastic bodies 70 and 71 shown in FIG. 8 instead of the support member 5 (see FIG. 2). Hereinafter, the second embodiment will be described with a focus on differences from the first embodiment.

A clearance C is formed between the guide portion 42 and the support portion 20. In the clearance C, elastic bodies 70 and 71 are installed.
The elastic body 70 is installed in an elastically deformed state between the outer peripheral side surface 20 a of the support portion 20 and the guide outer surface 42 a of the guide portion 42. Therefore, the elastic body 70 urges the guide outer surface 42a toward the disk center side by an elastic force (an inner-biased elastic body).
On the other hand, the elastic body 71 is installed in an elastically deformed state between the inner peripheral side surface 20 c of the support portion 20 and the guide inner surface 42 b of the guide portion 42. Therefore, the elastic body 71 urges the guide inner surface 42b toward the disk outer peripheral side by an elastic force (an outer-biased elastic body).

The elastic bodies 70 and 71 may be formed separately from the pad 4 or the mount 2, but may be formed integrally with the pad 4 or the mount 2.
The elastic bodies 70 and 71 may be formed by wire springs, but may be formed by leaf springs, rubber, or a resin material rich in elasticity.
The elastic bodies 70 and 71 also bias the guide portion 42 in the direction away from the disk D. For example, the elastic bodies 70 and 71 are configured to bias the guide portion 42 in the disk radial direction and the disk separating direction simultaneously by biasing the guide portion 42 obliquely.

  Further, the elastic bodies 70 and 71 are configured such that when the pad 4 is separated from the disk D, the disk outer peripheral side of the pad is separated more than the disk center side (see FIG. 7). For example, the elastic coefficient of the elastic body 70 is larger than that of the elastic body 71. Alternatively, the urging direction of the elastic body 70 is inclined in the disc separating direction from the urging direction of the elastic body 71.

(Other embodiments)
The present invention is not limited to the first and second embodiments, and may be the following modes.
(1) That is, the elastic body according to Embodiment 1 is formed of a leaf spring. However, the elastic body may be formed from a wire spring, rubber, or an elastic resin material.
(2) Moreover, the guide part and support part which concern on Embodiment 1, 2 were the structures by which a guide part is formed in convex shape and a support part is formed in concave shape. However, the guide portion may be formed in a concave shape, the support portion may be formed in a convex shape, and an elastic body may be provided between them.
(3) In the brakes according to the first and second embodiments, the elastic body biases the guide portion obliquely (an oblique direction having a component of the disk radial direction and the disk separation direction), thereby separating the pad from the disk. It was a configuration to let you. However, any configuration may be used as long as the pad is separated from the disk by an elastic body. For example, the guide portion may be biased obliquely by the elastic body by providing an inclined surface on a part of the guide portion biased by the elastic body. For example, an inclined surface may be provided on each of the guide outer surface (42a) and the guide inner surface (42b) of the guide portion. By adjusting the angles of these inclined surfaces, when the pad is separated from the disk, it is more preferable that the disk outer peripheral side of the pad is separated from the disk more than the disk center side of the pad. is there.
(4) The brakes according to the first and second embodiments are floating. However, the opposing brake may be provided with the elastic body or the support member according to the first and second embodiments.

It is a top view of a disc brake. FIG. 2 is a cross-sectional view taken along line AA in FIG. 1 according to the first embodiment. FIG. 3 is a cross-sectional view taken along line BB in FIG. 1. 3 is a perspective view of a support member according to Embodiment 1. FIG. FIG. 3 is a cross-sectional view taken along the line CC of FIG. 2 according to the first embodiment. It is sectional drawing corresponded in FIG. 5, Comprising: It is a figure which shows the state which has not installed the guide part in the support member. It is a side view of a disk and a pad. FIG. 4 is a partial cross-sectional view corresponding to FIG. 2 of a disc brake according to a second embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Disc brake 2 ... Mount 3 ... Caliper 4 ... Pad 5 ... Support member 20 ... Support part 21,22 ... Support receiving surface 42 ... Guide part 43, 44 ... Press receiving part 60, 61, 70, 71 ... Elastic body 60a , 61a ... curved portions 60b, 61b ... elastic pieces 60c, 61c ... inclination angle D ... disc

Claims (4)

Has a convex guide portion protruding circumferentially disk circumferential direction of the edge of the pad, the guide portion by the support portion formed in a concave shape on the mount, is supported movably in the disk axial direction and projecting A disc brake that prevents the guide portion from being pulled out in the disc radial direction by being inserted into the support portion ,
A plurality of elastic bodies are provided between the protruding guide part and the support part,
An outer elastic body is installed in an elastically deformed state between an outer peripheral side surface of the support portion on the outer peripheral side of the disk and a guide outer surface of the guide portion, and an inner peripheral side surface of the support portion on the inner peripheral side of the disc and the guide portion The inner elastic body is installed in an elastically deformed state between the inner surfaces of the guide, the outer elastic body urges the guide portion toward the center of the disc, and the inner elastic body applies the guide portion to the outer periphery of the disc. Vigorously ,
The outer elastic body and the inner elastic body bias the guide portion in an oblique direction having components of a disk radial direction and a disk separation direction, thereby attaching the guide portion in the disk separation direction simultaneously with the disk radial direction. disc brake, characterized in that the energizing. The disc brake according to claim 1,
The disc brake according to claim 1, wherein a biasing direction of the outer elastic body is inclined in a disc separating direction from a biasing direction of the inner elastic body . The disc brake according to claim 1 or 2,
The disc brake characterized in that an elastic coefficient of the outer elastic body is larger than an elastic coefficient of the inner elastic body . The disc brake according to any one of claims 1 to 3,
A disc brake characterized in that an inclined surface is provided on a part of a guide portion biased by the outer elastic body and the inner elastic body .

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