JP3673840B2 - Disc brake pad clip - Google Patents

Description

[0001]
[Industrial application fields]
The present invention relates to a disc brake pad clip mounted between a disc brake support and a friction pad.
[0002]
[Prior art]
Conventionally, in a disc brake, a pair of friction pads arranged so as to be able to clamp a rotor is attached to a support, and an uneven fitting portion is provided so that the friction pads can be slid toward the rotor surface. Usually, a protrusion is formed on a side edge portion of the friction pad, and a slide concave groove portion is formed on the support so as to be opposed to the protrusion. In this concave-convex fitting portion, when the friction pad sandwiched between the caliper and the hydraulic cylinder device is going to rotate together with the rotor, the pad side edge portion is anchored by the support to exert a braking force. ing. In order to move the friction pad so as to contact 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. This pad clip is attached to the anchor surface of the support that faces the side edge of the friction pad, and is formed so as to follow the anchor shape of the support. Then, 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 delivery side is continuously provided at the extended end.
[0003]
For example, in Japanese Utility Model Publication No. 61-14661, via an anchor protrusion formed between the outer peripheral surface of the pad and the side end surface so as to cover the periphery of the pad end, which is disposed between the both ends of the friction pad and the support. A clip having a portion bent in a U-shape and having an extension extending to the inner peripheral surface of the pad is attached. And the spring part contact | abutted to a pad inner peripheral surface is provided in the extension end to the pad inner peripheral part of this clip so that a pad may be urged | biased to a rotor radial direction outward. As a result, when the friction pad pinches 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 around the pinched portion. In this case, an urging force is generated in the opposite direction by the action of the spring portion so as to suppress this. Therefore, the friction pad tilts, and the inner peripheral surface end of the friction pad is subjected to a reaction force by the pad clip spring portion on the rotor delivery side, and the smooth movement of the friction pad with respect to the anchor portion of the support is not impaired. In addition, adjustments are made so that the pad does not come into contact with each other.
[0004]
[Problems to be solved by the invention]
By the way, when such a clip is attached to the support and the friction pad is assembled, the spring portion effectively exerts the lifting action of the friction pad. It has become a thing. For this reason, normally, when assembling the pad, it is necessary to work by once spreading the spring portion to form a pad mounting space for assembly.
[0005]
However, in such a conventional disc brake pad clip, when assembling the brake pad, it is necessary to attach the pad anchor protrusion to the support anchor groove while pushing the clip spring portion open. When pushing open, there was a problem that the projecting portion slipped and could not be fitted smoothly, and the assembly workability was poor.
[0006]
The present invention has been made paying attention to the above-mentioned points. By forming the guide protrusion on the clip spring portion, the guide piece and the protrusion are locked when the friction pad is assembled, and the spring portion is pushed open. An object of the present invention is to provide a brake pad pad clip that ensures safety and improves the workability of assembly.
[0007]
[Means for Solving the Problems]
In order to achieve the above object, a disc brake pad clip according to the present invention has a concave and convex fit between a brake pad disposed opposite to a rotor and a brake support portion that supports a brake force from the friction pad. A pad clip that is used in a structured disc brake and is mounted between a pad anchor projection and a support anchor groove forming the concave-convex fitting portion to support a friction pad. Is the outer part of the U-shaped part that follows the concave-convex fitting part that faces the rotor in the radial direction and the inner part that has a spring force that biases the friction pad outward in the radial direction of the rotor. A guide protrusion that extends to the edge and is bent in the same direction of the rotor radial direction is formed.
Further, the guide projection piece is bent outward in the rotor radial direction.
Furthermore, it is characterized in that the inner portion can be pushed and expanded while the edge of the anchor protrusion of the pad is engaged with the guide protrusion.
[0008]
[Action]
According to the above configuration, when the brake pad is assembled to the support, the brake pad is inserted into the pad clip so that the lower portion of the anchor projection is engaged with the guide projection piece with the pad inclined. And by pushing down the clip spring part as it is with the anchor protrusion of this pad, the anchor protrusion is locked to the guide protrusion and the insertion space can be secured without coming off the support anchor groove. Then, by rotating the pad upper portion so that the pad is parallel to the rotor surface, the upper edge portion of the anchor protrusion enters the support anchor concave groove portion and can be easily attached.
[0009]
【Example】
Hereinafter, a specific embodiment of the disc brake pad clip 10 according to the present invention will be described with reference to the drawings.
[0010]
FIG. 1 is a perspective view of a pad clip according to an embodiment, and FIG. 2 is a cross-sectional view showing a state in which the pad clip is incorporated in a disc brake, and shows only the right half. As shown in FIG. 2, in order to move and guide the friction pad 12 in the axial direction of the rotor 14 (direction perpendicular to the paper surface of FIG. 2), the friction pad 12 is interposed between the friction pad 12 and a support 16 that forms a padding anchor and a brake anchor. An uneven fitting portion is formed. In the embodiment, the pad anchor protrusion 18 is formed on the side end surface portion of the friction pad 12, and the concave groove portion 20 is formed on the braking anchor portion of the support 16 facing the pad side end surface, and both are fitted. The pad clip 10 according to the embodiment is disposed along the gap between the concave and convex fitting portions, and this straddles the outer peripheral portion of the rotor 14 so as to hold the friction pad 12 on both sides of the inner and the outer. It is formed by bending an inverted U-shaped flat plate member.
[0011]
The pad clip 10 has a U-shaped portion 22 in side view that is fitted into the recessed groove portion 20 of the support 16 at each of the inner side portion and the outer side portion of the rotor 14. That is, the U-shaped portion 22 includes an anchor piece 24 along the anchor surface 20A located in the inner back portion of the concave-convex fitting portion, and upper and lower opposing pieces 26 and 28 bent at the upper and lower ends of the anchor piece 24. It has become. And the front-end | tip part of the upper side (rotor outer peripheral side) opposing piece 26 is further bent, and the connection piece 30 extended outside from the clearance gap between the pad 12 and the support 16 is formed, and this connection piece 30 is inner and It is connected to a bridge portion 32 that connects both of the outer members. The lower (rotor inner peripheral) facing piece 28 is formed as a leaf spring portion that elastically supports the friction pad 12, and this leaf spring portion 28 is bent from the lower edge of the anchor piece 24 of the U-shaped portion 22. The arc portion 28A that is curvedly 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 in the concave groove portion 20 of the support 16, and the circular arc portion. An extension part 28B formed to extend obliquely upward from 28A, and an upper contact part that is formed at the tip of the extension part 28B and contacts the lower surface 18D of the pad anchor protrusion 18 in the friction pad 12 28C.
[0012]
In such a pad clip 10, the U-shaped portion 22 is fitted into the recessed groove portion 20 of the support 16, the upper facing piece 26 of the U-shaped portion 22 is placed on the upper surface portion 20 U of the recessed groove portion 20, and the anchor piece 24 is It is mounted on the support 16 by mounting it so as to abut on the support anchor surface 20A and arranging the leaf spring portion 28 so as to face the lower surface portion 20D of the recessed groove portion 20. Support clamping claws 34 are formed on the anchor piece 24 of the U-shaped portion 22 of the clip 10 so that the pad clip 10 does not detach from the support 16.
[0013]
The friction pad 12 includes a lining having a substantially fan-shaped outer shape and a back metal having a substantially same shape. The friction pad 12 has both side edges respectively opposed to the anchor region end face of the support 16 in the rotation direction of the rotor 1. However, as described above, the pad anchor protrusions 18 that are engaged with the concave grooves 20 of the support 12 are formed on both side edges of the friction pad 12. The friction pads 12 are arranged on the inner side and the outer side of the rotor 14 by engaging the pad anchor protrusions 18 on both sides with the U-shaped portions 22 of the pad clip 10 respectively. The friction pad 12 is mounted by inserting the pad anchor protrusion 18 into the U-shaped portion 22 of the pad clip 10 and pushing down the leaf spring portion 28 for insertion.
[0014]
Here, the pad clip 10 is attached to the support 16 in advance, and the pad 12 is assembled to the pad clip 10 attached to the support 16. In order to facilitate the pad assembling work, the pad clip 10 is attached. The clip 10 is configured as follows.
[0015]
A guide protrusion 36 is formed on the outer edge of the leaf spring portion 28 so as to expand outward, and the edge of the pad anchor protrusion 18 is engaged with the guide protrusion 36 so that the leaf spring portion 28 is engaged. It can be expanded, that is, the leaf spring portion 28 can be pressed downward to form a gap for mounting the pad anchor protrusion 18. That is, the right edge of the leaf spring portion 28 in FIG. 1 corresponds to the back metal of the friction pad 12, but here the lower guide protrusion 36 is bent so as to face the back surface of the pad anchor protrusion 18 so that the pad is not detached. Is formed. In particular, the guide protrusion 36 is formed so as to be inclined so that the upper edge portion is expanded outward, and the outer inclination angle β formed with the horizontal plane is β <90 ° as shown in FIG. It is formed as follows.
[0016]
Further, an upper guide protrusion 38 is bent upward on one side edge of the upper facing piece 26 in the U-shaped portion 22, that is, on the same side edge of the lower guide protrusion 36. The upper guide protrusion 38 sandwiches the support 16 in the mounted state, but is not parallel to the surface of the support 16 but is inclined and bent. The bending direction is the same as that of the lower guide projection piece 36, and the angle α formed with the horizontal plane following the upper facing piece 26 is formed such that α <90 °. The relation between α and β is set so that the relational expression of α <β is established.
[0017]
Further, as shown in FIG. 3, the bent portion of the lower guide protruding piece 36 protrudes outward from the bent portion of the upper guide protruding piece 38, and the dimensional distance L therebetween is larger than the thickness of the back metal of the friction pad 12. It is set to be smaller. As a result, when the pad anchor protrusion 18 is inserted from above using the upper and lower guide protrusions 38 and 36 as a guide, the pad anchor protrusion 18 is inserted obliquely while being regulated by these inclination angles α and β. It has become.
[0018]
The operation of assembling the friction pad using the disc brake pad clip configured as described above will be described.
[0019]
As shown in FIG. 4A, the pad anchor protrusion 18 in a state where the upper portion of the friction pad 12 is inclined leftward, that is, in a state where the friction pad 12 is inclined in accordance with the inclination of the lower guide protrusion 36. Are inserted so that the outer edge of the lower end of the lower end of the lower guide projection 36 coincides with the bent corner. As a result, the pad anchor protrusion 18 comes into contact with the leaf spring portion 28 of the pad clip 10, and the pad anchor protrusion 18 is inserted so that the inner edge of the upper end portion is located outside the upper guide protrusion 38. When the inclination angle of the pad 12 is α, the pad anchor does not contact the upper guide protrusion 38, and when the inclination angle is β, the pad anchor contacts the upper guide protrusion 38. By pushing down the friction pad 12 from this state in the direction of the arrow in FIG. 4B, the spring portion 28 is pushed down with the pad anchor protrusion 18 in contact with the upper and lower guide protrusions 36 and 38.
[0020]
When the leaf spring portion 28 is further pushed down, the pad anchor protrusion 18 can be rotated about the lower edge corner 14 as a fulcrum as shown in FIG. Get into the bottom of the. Finally, as shown in FIG. 4 (4), the pad anchor protrusion 18 is slidably held in the pad clip 10 with the friction pad 12 vertical.
[0021]
In such an embodiment, when the pad clip 10 is attached to the support 16 and the friction pad 12 is assembled thereto, the lower portion of the pad anchor protrusion 18 of the friction pad 12 is connected to the U-shaped portion 22 of the clip 10. In order to rotate the upper part of the pad anchor protrusion 18 by operating the clip leaf spring 28 to be pushed down by using the gap (L) between the upper guide protrusion 38 and the lower guide protrusion 36 at the same angle. Can be easily installed. When the pad 12 rotates, the lower guide protrusion 36 engages the pad anchor protrusion 18 to prevent the pad anchor protrusion 18 from coming off the support anchor groove 20. Therefore, the friction pad 12 can be assembled to the support 16 by a continuous operation of inserting, pushing down, and rotating the clip 10 and can be assembled very easily only by the pad operation without using an auxiliary jig. It is.
[0022]
【The invention's effect】
As described above, according to the present invention, by forming the lower guide protrusion to the plate spring portion side edge of the pad clip, upon assembly friction pad and the fulcrum Hook the lower guide protrusion anchor projections By doing so, the anchor protrusion can be easily rotated, so that the anchor protrusion smoothly enters the clip, and the assembling work can be easily performed. Further, by providing an upper guide protrusion bent in the same direction as the lower guide protrusion on the upper side, the protrusion is guided by the upper and lower guide protrusions, so that the assembling work can be performed more smoothly.
[Brief description of the drawings]
FIG. 1 is a perspective view of a pad clip according to an embodiment.
FIG. 2 is a cross-sectional view of an essential part showing an assembled state of a pad clip according to an embodiment to a disc brake.
FIG. 3 is a side view of the pad clip of the embodiment.
FIG. 4 is an explanatory diagram of a friction pad assembling operation.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 Pad clip 12 Friction pad 14 Rotor 16 Support 18 Pad anchor protrusion part 20 Anchor anchor groove part 20A Anchor surface 20D Lower surface part 22 U-shaped part 24 Anchor piece 26 Upper facing piece 28 Lower facing piece (leaf spring part)
28A Arc part 28B Extension part 28C Upper contact part 30 Connection piece 32 Bridge part 34 Support clamping nail 36 Lower guide protrusion 38 Upper guide protrusion

Claims (3)

Used for a disc brake having a concave / convex fitting structure with a braking support portion of a friction pad disposed opposite to the rotor and a support for supporting a braking force from the friction pad, of the pad constituting the concave / convex fitting portion. In a pad clip that is mounted between the anchor protrusion and the anchor concave groove portion of the support and supports the friction pad, the pad clip faces the rotor radial direction of the U-shaped portion that follows the concave-convex fitting portion. outer part and, in the inner portion having a spring force for biasing the friction pad in the rotor radially outwardly, as well as extending the anti-rotor side edge, guide collision bent in the same direction of the rotor radially Disc brake pad clip characterized by forming a piece . The disc brake pad clip according to claim 1, wherein the guide projecting piece is bent outward in the radial direction of the rotor. 3. The disc brake pad clip according to claim 1, wherein the inner protrusion can be expanded while engaging the edge of the anchor protrusion of the pad with the guide protrusion.

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