JPH0723833U - Disc brake pad clip - Google Patents

Abstract

(57) [Abstract] [Purpose] To obtain a pad brake for a disc brake that can release the pad elastically from the rotor side surface when releasing the brake and keep the gap between the lining and the rotor side surface constant even if the lining wears. And [Structure] A base portion 12 attached to a support and a pad holding portion 14 that elastically restrains the end portion of the pad from being pulled out in the axial direction of the rotor are integrally connected by a spring portion 13. The protruding piece 24 formed on the pad holding portion is inserted with a gap interposed between the stoppers 22a and 22b formed on the base portion.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 This invention has the function of keeping the pad away from the rotor side surface when releasing the braking, and the gap between the lining and the rotor side surface is not too far apart, and the gap between the inner pad and the outer pad and the rotor side surface is equalized to ensure stable braking operation. The present invention relates to a disc brake pad clip capable of performing.

[0002]

[Prior art]

 The disc brake has inner and outer pads movably supported in the rotor axial direction by a support that is fixed to the vehicle body with a rotor that rotates in tandem with wheels, and is also movably supported by the support in the rotor axial direction. The inner and outer pads are pressed against the side of the rotor by the piston pushed out from the caliper and the claws of the caliper, and the wheels are braked via the rotor by the friction between the pad lining and the rotor.

At the time of releasing the braking, pressure oil for pushing out the piston is removed, and the pad is separated from the side surface of the rotor by the spring member so as to avoid the drag of the brake.

FIG. 5 shows an example of a disc brake disclosed in Japanese Utility Model Laid-Open No. 5-14680 in which a pad is separated from a side surface of a rotor by a spring member. In FIG. 5, the V-shaped return spring 1 made of wire has a rotor 4 and two pads 3 and 3 between its legs 2 and 2, and returns to the upper end of each pad 3 and 3. Both ends of the spring 1 are locked to apply elastic force to the pad in a direction away from the side surface of the rotor.

[0005]

[Problems to be solved by the device]

 Figure 5 shows a disk brake that uses a V-shaped spring made of wire to move the pad away from the side of the rotor. (1) As the pad lining wears, the elastic force to return the pad is increased. Become stronger. (2) If the lining wears, the pad will be returned too much and the gap between the lining and the rotor side surface will become large, which will increase the stroke of the brake pedal. (3) Only one pad returns, and the other pad may be dragged. There is an inconvenience.

[0006]

[Means for solving the problem]

 According to this invention, the base part attached to the support and the pad holding part that elastically suppresses the removal of the pad end part in the rotor axial direction to support the pad are integrally connected by the spring part, and the pad holding part is connected. The formed protruding piece is inserted between two stoppers formed on the base portion to regulate the stroke of the pad holding portion.

[0007]

[Action]

 The pad, whose end is elastically supported by the pad holding part of the pad clip, is pushed by the claws of the piston and caliper when braking and is directed toward the rotor side face together with the pad holding part against the spring force of the spring part. To move.

The movement of the pad holding portion is stopped when the protrusion hits the rotor-side stopper formed on the base portion, but when the pressing force is further increased, the pad slides on the pad holding portion to further face the rotor. It can proceed and the lining can be pressed sufficiently against the side of the rotor. Therefore, as the lining wears, the pad moves from the holder to the rotor. Part of the force applied to the pad during braking is stored in the spring portion 13 via the holding portion as the pad returning force.

At the time of releasing the braking, the pad is held by the pad holding portion due to the spring portion and separated from the rotor side surface, and stops when the protrusion hits the stopper on the side opposite to the rotor. That is, since the stroke of the pad holding portion is regulated by the two stoppers, the pad does not return too much, and the pad comes out of the pad holding portion according to the wear of the lining. The gap between the lining and the side surface of the rotor can be made constant.

[0010]

【Example】

 1 to 4 show an embodiment of a disc brake pad clip of the present invention, FIG. 1 is a perspective view, FIG. 2 is a front view showing a state in which the support is attached to one end of a support, and FIG. 3 is a direction of an arrow a in FIG. FIG. 4 is a side view seen from above, and FIG. 4 is a plan view seen from the direction of arrow b in FIG.

The pad clip 11 is integrally formed by cutting the base portion 12, the spring portion 13, and the pad holding portion 14 from an elastic metal plate and bending them.

The base portion 12 is formed by bending an upper piece 15, a lower piece 16, and an intermediate piece 17 into a U-shape. The holding arms 18 are provided on both side edges of the upper piece 15 and the holding arms 18 are provided on both side edges of the lower piece 16. 19 is formed. The base 12 is inserted into the U-shaped cut 21 of the support 20 as shown in FIG. 2, and is attached to the support 20 while the upper and lower portions of the cut 21 are held down by the holding arms 18 and 19. The edge of the upper piece 15 is cut to form stoppers 22a and 22b.

The spring portion 13 is formed to project from the side of the intermediate piece 17. The spring portion 13 extends along the support 20, and has a U-shaped pad holding portion 14 slidably fitted into the U-shaped base portion 12 at the folded back end portion. At the end of the upper piece 23 of the holding portion 14, a projecting piece 24 inserted between the stoppers 22a and 22b of the upper piece of the base is bent up. The pad holding portion 14 elastically clamps the rectangular end portion of the pad 25 shown by the chain line in FIG. The width of the protruding piece 24 is shorter than the width of the gap between the stoppers 22a and 22b by g as shown in FIGS. The operation of this pad clip is as follows.

One pad clip 11 is formed by inserting the base 12 into the notch 21 on one side of the end portion of the support 20 formed in a gate shape with the rotor 25 sandwiched between the support arms 18 and 19. It can be installed while holding down. As shown in Fig. 3, attach the other pad clip to the opposite side of the support with the rotor separated. The action of the pad clip on the opposite side is the same as that of the pad clip described above. At the time of non-braking, the pad holding portion 14 moves to the side opposite to the rotor side as shown in FIGS. 3 and 4 due to the spring portion 13, and the projecting piece 24 is in contact with the stopper 22a. The lining of the pad whose ends are sandwiched by the holding portion 14 is separated from the side surface of the rotor.

The sliding resistance between the pad 25 and the pad holding portion 14 is set to be larger than the force of the spring portion 13, and when the pad is pressed against the side surface of the rotor, the pad holding portion 14 together with the pad holds the spring portion during braking. It moves to the rotor side against the elastic force of 13, and the projecting piece 24 first comes into contact with the rotor side stopper 22b to stop the holding portion 14. When it is necessary to further project the pad toward the rotor due to wear of the lining, the pad slides with the holding portion 14, and only the pad moves, so that the lining can be sufficiently pressed against the rotor side surface.

When the pressing of the pad by the piston is stopped in order to release the braking, the pad holding portion 14 is separated from the rotor by the elasticity of the spring portion 13 while holding the pad, and the projecting piece 24 is pushed to the stopper 22a on the side opposite to the rotor. Abut and stop. As a result, the pad lining is held at an appropriate distance from the side surface of the rotor, and dragging does not occur. Also, the pads will not be too far apart and will not interfere with the return of the opposite pad. As shown by a chain line in FIG. 2, the lower piece 16 of the base portion can be extended to form an anti-rattle spring portion 26 that prevents rattling of the pad.

[0017]

[Effect of device]

 (1) Since the pad is held by the holding portion 14 and the spring portion 13 applies an elastic force in a direction away from the rotor, dragging does not occur during non-braking.

(2) The holding portion 14 elastically holds the pad, and when the projection 24 and the stopper 22b come into contact with each other during braking, and when a braking force more than a predetermined value is applied, the pad is moved. It is slidable with respect to the holding part, and even if the lining wears, the pad slides in the holding part and is repositioned.

(3) Since the return stroke of the pad with respect to the support is regulated by the stopper 22a, the gap between the lining and the rotor side surface can be kept constant.

(4) Even if the lining wears, the pad return load does not change.

(5) Since the pad does not slide in the clip when the brake is released, the return resistance can be reduced.

[Brief description of drawings]

FIG. 1 is a perspective view of a disc brake pad clip of the present invention.

FIG. 2 is a front view showing a state in which this pad clip is attached to one end of a support.

FIG. 3 is a side view seen from the direction of arrow a in FIG.

4 is a side view seen from the direction of arrow b in FIG.

FIG. 5 is a plan view showing an example of a conventional disc brake.

[Explanation of symbols]

 1 Return Spring 2 Leg Part 3 Pad 4 Rotor 11 Pad Clip 12 Base Part 13 Spring Part 14 Pad Holding Part 15 Upper Piece 16 Lower Piece 17 Intermediate Piece 18 Holding Arm 19 Holding Arm 20 Support 21 Notch 22a Stopper 22b Stopper 23 Upper Piece 24 Protrusion Piece 25 Pad 26 Anti-rattle spring part

Claims (1)

[Scope of utility model registration request] 1. A base portion (12) attached to a support (20) and a pad holding portion (14) for elastically restraining and supporting a pad in the rotor axial direction are integrally connected by a spring portion (13). In addition, the protrusion (24) formed on the pad holding portion (14) restricts the stroke of the pad holding portion (14) formed on the base portion (2) 2
A disc brake pad clip inserted with a gap between the individual stoppers (22a) and (22b).