JPH08254227A - Pad clip for disk brake - Google Patents

Abstract

PURPOSE: To stably exhibit pad energizing function due to a spring part by providing a plate spring which energizes a frictional pad outwardly in a diameter direction of a rotor, and a piece which is cut and stood from a base end of the plate spring in a direction opposite to an energizing direction of the plate spring and abuts against the support side. CONSTITUTION: A plate spring 28 of a pad clip 10 supports couple from a frictional pad 12. A cut and stood piece 40 is formed on an arcuate part 28A on the root of the plate spring 28. The root of the plate spring 28 corresponds to the root of the plate spring 28, and they have a common spring fulcrum. Since a whole surface of the piece 40 is in a connection state with a recessed groove corner part 20C, elastic repulsion of the plate spring 28 is received by the whole of the piece 40, thus stable elastic load is obtained. The plate spring 28 of the pad clip 10 are formed at the same position as the cut and stood piece 40, so that blanking performance is improved and a manufacturing cost is reduced at the time of manufacturing the pad clip 10.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pad clip used in a disc brake for braking a vehicle, and more particularly, to a friction pad that is moved in the axial direction of a rotor and held so as to reduce sliding resistance against a support. The improvement of the pad clip to do.

[0002]

2. Description of the Related Art Conventionally, in a disc brake, a pair of friction pads arranged so that the rotor can be sandwiched is mounted on a support, and the friction pads sandwiching the rotor by a caliper and a hydraulic cylinder device try to rotate together with the rotor. When this is done, the braking force is exerted by anchoring the pad side edge with a support. Since the friction pad is moved so as to be in contact with the rotor surface while being held by the support, a pad clip is attached to the anchor portion between the pad and the support in order to reduce sliding friction. The pad clip is attached to the anchor surface of the support facing the side edge portion of the friction pad, and is formed so as to follow the anchor shape of the support. Further, the pad clip is extended to the inner peripheral side of the friction pad, and a spring portion that engages with the inner peripheral side corner portion of the friction pad on the rotor entry side is continuously provided at the extending end. For example, in Japanese Utility Model Laid-Open No. 57-149337, as shown in FIG. 4, the pad is disposed between both ends of the friction pad 1 and the support 2 and covers the periphery of the end of the pad from the outer peripheral surface of the pad. A U-shaped clip 3 extending from the side end surface to the inner peripheral surface is attached. And this clip 3
A plate piece extending in a T-shape from the clip body in the pad thickness direction is provided at an end of the pad extending to the inner peripheral portion of the pad, and the plate piece is extended to the lower surface of the pad as a bent spring portion 4. The inner peripheral surface of the pad is urged outward in the radial direction of the rotor so as to separate from the support surface facing the pad. As a result, when the friction pad presses the rotor and rotates integrally with the rotor, a rotational moment is generated in the friction pad, and a couple force is generated to rotate the friction pad about the sandwiched portion. In this case, in order to suppress this, the action of the spring portion generates an urging force in the opposite direction. Therefore, the friction pad tilts,
The inner peripheral surface end of the friction pad on the rotor feeding side receives a reaction force by the pad clip spring part, so that smooth movement of the friction pad with respect to the anchor part of the support is not impaired. It is adjusted so that it does not occur.

By the way, the spring portion is formed by curving a T-shaped portion from the body of the pad clip. However, in order to effectively exert the lifting action of the friction pad, It has been attempted to reduce the spring constant of the spring portion by providing a cut-and-raised piece on the support mounting portion on the side of the clip body so that the clip body is slightly lifted from the support. As shown in FIG. 4, a U-shaped cut is made in the main body of the clip 3 extending on the inner peripheral surface of the pad 1, and a cut-and-raised piece 5 is provided so that the clip main body floats from the support surface. This is formed so as to directly contact the support surface. This makes pad 1
Since the gap between the inner peripheral surface of and the support facing portion can be reduced, the spring constant of the spring portion 4 can be reduced.

[0004]

However, in the above-mentioned conventional disc brake pad clip, the pad clip is formed in a long length along the radial direction of the rotor so as to face the entire side surface of the friction pad. A spring portion is formed at the tip portion that wraps around the peripheral surface and is engaged with the inner peripheral portion of the pad, so that the spring is biased so as to cancel the braking couple. For this reason, the pad clip extends beyond the anchor surface of the pad and the support to the inner peripheral side of the pad, and then has a spring portion in which a T-shaped plate piece is curved so as to be embedded in the inner peripheral portion of the pad. Since it is necessary to provide it, there is a problem with plate cutting workability for forming the spring portion, and it is necessary to secure a sufficient length from the concave-convex fitting portion to the inner peripheral portion of the pad. However, there is a problem in that it is disadvantageous in terms of cost. Furthermore, in order to reduce the spring constant of the spring part, a cut-and-raised piece is formed on the clip body side, but the force applied to the spring part acts on this cut-and-raised piece, and all of this force is received by the cut-and-raised piece. Therefore, there is a problem that the strength is weak.

The present invention has been made to solve the above-mentioned problems, and its purpose is to make the pad urging action by the spring portion of the pad clip stable, and not to extend to the inner peripheral side of the pad. (EN) It is an object to provide a pad clip for a disc brake, which can improve the plate-cutting property and can share the spring portion and the cut-and-raised portion to save the material. In addition, a pad clip with a structure that can improve the strength without unevenness in the load by making sure that the forces acting on the spring part for pad support and the cut-and-raised part for receiving reaction force on the support side are not biased The purpose is to provide.

[0006]

In order to achieve the above object, a disc brake pad clip according to the present invention comprises, firstly, a friction pad arranged to face a rotor,
A pad clip used for a disc brake having a support for supporting a braking force from the friction pad, the pad clip being mounted between a side edge portion of the pad and an anchor portion of the support to support the friction pad, The braking support portion between the support anchor portion and the friction pad is formed in a U-shape when viewed from the side as a concave-convex fitting structure, and the pad clip is a portion that follows the U-shape portion and faces the rotor radial direction. On the one hand, a leaf spring portion that urges the friction pad outward in the radial direction of the rotor, and a base end portion of the leaf spring portion is cut and raised in a direction opposite to the leaf spring urging direction and abuts against the support side. Is provided, and the section is brought into contact with the corner of the uneven portion.

Secondly, it is used for a disc brake having a friction pad arranged to face the rotor and a support for supporting a braking force from the friction pad, and the side edge of the pad and the support are used. In a pad clip that is mounted between an anchor portion and supports a friction pad, a braking support portion between the support anchor portion and the friction pad is formed in a U-shape in a side view as a concave-convex fitting structure, and the pad is formed. In the clip, a plate spring portion that follows the U-shaped portion and that biases the friction pad outward in the rotor radial direction is formed on one of the opposing portions in the rotor radial direction,
The base end portion of the leaf spring portion is provided with a piece that is cut and raised in the direction opposite to the biasing direction of the leaf spring and abuts against the support side, and the spring fulcrum of the leaf spring portion and the fulcrum of the cut and raised piece are common. It was formed.

[0008]

According to the first structure, the U-shaped portions of the pad clips are attached to the friction pad opposing portions of the anchor portion of the support, and the rotor is attached to one of the upper and lower opposing portions of the U-shaped portions. The leaf spring portion that supports the couple of the friction pad on the feeding side is formed by the clip body itself so that the U-shaped portion does not extend to the inner peripheral side of the pad as in the conventional case.

For this reason, the protrusion (or the groove) provided on the friction pad is engaged with the U-shaped portion of the pad clip fitted in the groove (or the protrusion) provided on the anchor of the support. The friction pads can be assembled to the support by engaging the rotor turn-in side and the rotor turn-out side at one place each, and the clip body is not required to have a T-shaped spring portion. The plate-cutting property when processing is improved, and the manufacturing cost can be reduced.

Further, by the leaf spring portion of the pad clip,
The lower surface of the protrusion (or the upper surface of the protrusion) is elastically supported on the lower surface of the recessed groove (or the upper surface of the protrusion) forming the couple support surface so that there is substantially no play between the two surfaces. The cut-and-raised piece bent in the direction opposite to the spring part is formed so as to be joined to the corner of the U-shaped part on the support side, so the spring reaction force should be applied to the entire surface of the cut-and-raised piece. As a result, the spring constant can be reduced and the spring load can be stabilized.

Further, according to the second aspect of the invention, since the spring portion and the fulcrum portion of the cut-and-raised piece are common, the support of the spring force is not received only by the piece, and the strength of the piece is improved. .

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Specific embodiments of a disc brake pad clip according to a first embodiment of the present invention will be described below with reference to FIGS.
It will be described in detail based on.

FIG. 1 is a sectional view showing a state in which a pad clip 10 according to an embodiment is mounted on a disc brake and an enlarged sectional view of an essential part of the clip. FIG. 2 is a pad clip 10.
FIG. 3 is a front view and a bottom view of FIG.

As shown in FIG. 1 (1), the friction pad 12
In order to guide and move the rotor 14 in the axial direction of the rotor 14 (the direction orthogonal to the paper surface of FIG. 1), a concavo-convex fitting portion is formed between the friction pad 12 and the pad holding and support 16 which serves as a braking anchor. In the embodiment, a protrusion 18 is formed on the side end surface portion of the friction pad 12 to support the pad 1 end surface.
A recessed groove portion 20 is formed in the braking anchor portion 6 to fit both of them. The pad clip 10 according to the embodiment is arranged along the gap between the concave-convex fitting portion, and the pad clip 10 straddles the outer peripheral portion of the rotor 14 so as to hold the friction pads 12 on both sides of the inner and outer parts as well. It is formed by bending an inverted U-shaped flat plate member.

The pad clip 10 has an inner side portion and an outer side portion of the rotor 14,
The support 16 has a U-shaped portion 22 in a side view, which is fitted into the concave groove portion 20. That is, the U-shaped portion 22 is composed of the anchor piece 24 along the anchor surface 20 </ b> A located inside and inside the concave-convex fitting portion, and the upper and lower facing pieces 26, 28 bent at the upper and lower ends of the anchor piece 24. Has become. Then, the tip of the upper (rotor outer peripheral side) facing piece 26 is further bent, and a connecting piece 30 extending outward from the gap between the facing portions of the pad 12 and the support 16 is provided. It is connected to the bridge portion 32 that connects them. The opposing piece 28 on the lower side (inner side of the rotor) is formed as a leaf spring portion that elastically supports the friction pad 12, and the leaf spring portion 28 is bent from the lower edge of the anchor piece 24 of the U-shaped portion 22. The circular arc portion 28A, which is curved and formed without being joined to the lower surface portion 20D of the concave groove portion 20 while being joined to the lower region of the anchor surface of the concave groove portion 20 of the support 16, and the circular arc portion. 28
An extending portion 28 formed by extending obliquely upward from A
B and the friction pad 1 formed at the tip of the extending portion 28B.
The upper contact portion 28C is in contact with the lower surface 18D of the protrusion 18 in FIG.

In such a pad clip 10, the U-shaped portion 22 is fitted into the concave groove portion 20 of the support 16 and the upper facing piece 26 of the U-shaped portion 22 is attached to the upper surface portion 20U of the concave groove portion 20.
Is attached so that the anchor piece 24 abuts on the support anchor surface 20A, and the leaf spring portion 28 is arranged so as to face the lower surface portion 20D of the concave groove portion 20.
It is attached to 6. In order to prevent the pad clip 10 from coming off the support 16, the support sandwiching claw 3 is provided on the anchor piece 24 and the upper facing piece 26 of the U-shaped portion 22 of the clip 10.
4 are formed.

The friction pad 12 is composed of a lining having a substantially fan-shaped outer shape and a back metal having a substantially same shape, and the support 16 is arranged in the rotational direction of the rotor 14.
The friction pad 12 has opposite side edges respectively facing the end surface of the anchor area. As described above, the protrusions 18 for engaging with the recessed grooves 20 of the support 16 are formed on both side edges of the friction pad 12. ing. Then, the friction pads 12 are arranged on the inner side and the outer side of the rotor 14 by engaging the protrusions 18 on both sides in the rotor circumferential direction with the U-shaped portions 22 of the pad clip 10. This friction pad 12
Is attached by inserting the protruding portion 18 into the clip-shaped portion 22 and pushing down the leaf spring portion 28 for insertion. In addition,
The stopper piece 3 is provided on the outer edge portion of the leaf spring portion 28 of the clip 10.
6 is provided to face the outer surface side of the pad 12.

As described above, the pad clip 10 has a curved arc portion 28A in which the leaf spring portion 28 is curved without being joined to the lower surface portion 20D of the concave groove portion 20 of the support 16.
An extended portion 28B formed by extending the arc portion 28A obliquely upward, and an upper contact portion formed on the tip of the extended portion 28B and abutting against the lower surface 18D of the protrusion 18 of the friction pad 12. It is composed of the contact portion 28C,
In addition to this, a cut-and-raised piece 40 is provided at a portion extending from the circular arc portion 28A, which is the base end portion of the leaf spring portion 28, to the extension portion 28B. This is cut and raised in the direction opposite to the pad urging direction of the leaf spring portion 28 and abuts on the corner portion 20C between the support concave groove lower surface portion 20D and the anchor portion 20A. I try to stabilize the. The corner portion 20C is formed in a circular arc to prevent stress concentration, but the segment 40 is curved so as to follow the circular arc corner portion 20C and the entire surface thereof is curved so as to be joined to the corner portion 20C. There is. That is, although the segment 40 is cut and raised by making a U-shaped cut, the cut start point is made to coincide with the arc start point on the anchor surface 20A, and the cut is made from the arc portion 28A of the leaf spring portion 28 to the extension portion 28B. A U-shaped cut is made to make a U-turn to reach the arc starting point. Then, the piece 40 is cut and raised on the back side of the leaf spring portion 28, and is bent and formed so as to coincide with the arc of the arc corner portion 20C as shown in FIG. 1 (2). Further, the arcuate portion 28A of the leaf spring portion 28 is an arcuate portion which does not contact the lower surface portion 20D of the concave groove portion 20 as shown in FIG.
The arc start point of A is made to coincide with the cut start point of the intercept 40 (center line L in FIG. 2 (1)), and the spring fulcrum of the leaf spring portion 28 and the fulcrum of the cut and raised segment 40 are formed in common. Is there.

The operation of the pad clip 10 having such a structure is as follows. Braking while the vehicle is moving forward is performed by pressing a pair of friction pads 12 toward the rotor 14 by means of a hydraulic cylinder mechanism provided on a caliper (not shown). At this time, both friction pads 12 pinch the rotor 14 and move integrally with the rotor 14, and at that time, a rotation moment is generated in the friction pad 12 to rotate the friction pad 12 around the pinching portion. A couple to try is generated. The friction pad 12 is rotated by this couple, and the lower surface 18D of the protruding portion 18 of the friction pad 12 is pressed against the upper surface of the leaf spring portion 28 of the U-shaped portion 22 of the pad clip 10 on the rotor feeding side. Be done.

In this case, the leaf spring portion 28 provided in the lower facing portion of the U-shaped portion 22 elastically supports the pushing force, and there is substantially no play between the two sides. Unstable behavior such as vibration of the friction pad 12 during braking of the vehicle is suppressed, and rotation of the friction pad 12 is suppressed. Here, the leaf spring portion 28 of the pad clip 10 supports the couple from the friction pad 12, but the leaf spring portion 28
A cut-and-raised piece 40 is provided on the circular arc portion 28A that is the root of the blade, the root of the piece 40 coincides with the root of the leaf spring portion 28, and the spring fulcrum is common. As a result, the elastic force urging force of the leaf spring portion 28 is in a state in which the entire surface of the segment 40 is joined to the concave groove corner portion 20C, so that the elastic force reaction force of the leaf spring portion 28 is received by the entire segment 40 and a stable elastic load is obtained. .
As a result, the supporting force of the pad becomes stable, and the spring constant of the leaf spring portion 28 can be reduced. Further, since the leaf spring portion 28 of the pad clip 10 and the cut-and-raised piece 40 are formed in the same portion, the pad clip 10 has a common structure.
The plate cutting property is improved, and the manufacturing cost can be reduced.

Next, FIG. 3 shows a mounting structure of the pad clip 100 according to the second embodiment of the present invention. The difference of the second embodiment from the first embodiment is that it is applied to a disc brake having a concave-convex fitting structure in which a concave groove portion 200 is formed on the side end surface of the friction pad 12 and a protrusion 180 is formed on the support 16. It is a point. The pad clip 100 has a U-shaped portion 220 mounted on the concave and convex fitting portion. The leaf spring portion 260 formed on the clip 10 is formed on the upper facing piece of the U-shaped portion 220. That is, the connecting piece 300 extending outward of the leaf spring portion forms the arc portion 260A at the corner portion connected to the U-shaped portion 220, and is curved without being joined to the upper surface portion 180D of the protrusion 180 of the support 16. I am letting you. An extending portion 260B formed by extending obliquely upward from the arc portion 260A is provided, and a tip end of the extending portion 260B is further curved to abut on the upper surface 200U of the concave groove portion 200 in the friction pad 12. The upper contact portion 260C is formed. Further, the extending portion 2 extends from the circular arc portion 260A which is the base end portion of the leaf spring portion 260.
It has a configuration in which a cut-and-raised piece 400 is provided at a portion applied to 60B. This is cut and raised in the direction opposite to the pad urging direction by the leaf spring portion 260 and abuts on the corner portion 180C between the upper surface portion 180D of the support protrusion 180 and the support end surface 300.
The load applied to 0 is stabilized. The corner portion 180C is formed in a circular arc in order to prevent stress concentration, but the segment 400 is formed in the circular arc corner portion 18
It is curved so as to follow 0C and its entire surface is a corner portion 180.
It is similar to the first embodiment that it is curved so as to be bonded to C. The arc portion 260A of the leaf spring portion 260 has the projection 1
It is an arc that does not contact the upper surface 180D of 80,
The circular arc starting point of the circular arc portion 260A coincides with the cutting starting point of the segment 400, and the spring fulcrum of the leaf spring portion 260 and the fulcrum of the cut and raised segment 400 are formed in common.

Also in such an embodiment, it is possible to reduce the spring constant by stabilizing the spring load and improve the plate cutting to reduce the manufacturing cost.

[0023]

As described above, according to the pad clip of the present invention, the braking support portion between the support anchor portion and the friction pad is formed in a U-shape in a side view as an uneven fitting structure, and the pad is formed. The clip is a portion that follows the U-shaped portion and has a leaf spring portion that biases the friction pad outward in the rotor radial direction on one of the opposing portions in the rotor radial direction, and a base end portion of the leaf spring portion. And a piece which is cut and raised in a direction opposite to the biasing direction of the leaf spring and abuts on the support side, the abutment is made to abut a corner of the uneven portion, and a spring fulcrum of the leaf spring portion and a cut and raised piece are provided. By forming a common fulcrum of, the improvement of plate cutting property by sharing the cut-and-raised piece with the leaf spring part and the reduction of the spring constant accompanying suppression of load variation and the improvement of the strength of the cut-and-raised piece can be achieved. Effect that can be current can be obtained.

[Brief description of drawings]

FIG. 1 is a side explanatory cross-sectional view and a main-portion cross-sectional view of a mounted state of a pad clip according to an embodiment.

FIG. 2 is a front view and a bottom view of the clip.

FIG. 3 is an explanatory sectional view of a second embodiment.

FIG. 4 is an explanatory diagram of a conventional pad clip.

[Explanation of symbols]

 10 Pad Clip 12 Friction Pad 14 Rotor 16 Support 18 Projection 20 Recessed Groove 22 U-Shaped Part 24 Anchor Piece 26 Upper Opposing Piece 28 Leaf Spring Part (Lower Opposing Piece) 30 Connecting Piece 32 Bridge Part 34 Support Clamping Claw 36 Stopper Piece 40 Cut and raised section

Claims (2)

[Claims] 1. A disc brake having a friction pad arranged to face a rotor and a support for supporting a braking force from the friction pad, the side edge portion of the pad and the anchor portion of the support. In the pad clip that is mounted on the base plate and supports the friction pad, the braking support portion between the support anchor portion and the friction pad is formed in a U-shape in a side view as a concave-convex fitting structure, and the pad clip has the U-shape. A leaf spring portion that urges the friction pad outward in the rotor radial direction, which is a portion that follows the letter-shaped portion and that faces the rotor radial direction, and a leaf spring is provided at the base end portion of the leaf spring portion. A disc clip pad clip, characterized in that a segment cut and raised in a direction opposite to the urging direction is provided so as to abut against a support side, and the segment is abutted against a corner of an uneven portion. 2. A disc brake having a friction pad arranged opposite to a rotor and a support for supporting a braking force from the friction pad, the side edge portion of the pad and the anchor portion of the support. In the pad clip that is mounted on the base plate and supports the friction pad, the braking support portion between the support anchor portion and the friction pad is formed in a U-shape in a side view as a concave-convex fitting structure, and the pad clip has the U-shape. A leaf spring portion that urges the friction pad outward in the rotor radial direction is formed at one of the opposing portions in the rotor radial direction that is a portion that follows the letter-shaped portion, and the leaf spring is provided at the base end portion of the leaf spring portion. A disc sleeve characterized in that a spring fulcrum of the leaf spring portion and a fulcrum of the cut-and-raised segment are formed in common by providing a segment that is cut and raised in a direction opposite to the urging direction and abuts against the support side. Pad clip for rake.