JP2594902Y2 - Pad clip for disc brake - Google Patents

Description

[Detailed description of the invention]

[0001]

This invention has the function of moving the pad away from the side of the rotor when braking is released, making the gap between the lining and the side of the rotor too small, and equalizing the gap between the inner pad and the outer pad and the side of the rotor. And a pad clip for a disc brake capable of performing a stable braking operation.

[0002]

2. Description of the Related Art Disc brakes have a support fixed to a vehicle body with a rotor rotating in conjunction with wheels being supported on an inner pad and an outer pad so as to be movable in the axial direction of the rotor. The inner and outer pads are pressed against the side surfaces of the rotor by the pistons pushed out of the movably supported calipers and the claw portions of the calipers, and the wheels are braked via the rotor by friction between the pad lining and the rotor.

At the time of releasing the braking, pressure oil for pushing the piston is removed, and the pad is separated from the side surface of the rotor by a spring member to prevent the brake from being dragged.

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, a wire-shaped return spring 1 formed in a V shape has a rotor 4 and two pads 3, 3 positioned between its legs 2, 2, and is returned to the upper end of each pad 3, 3. Both ends of the spring 1 are locked to apply elastic force to the pad in a direction away from the rotor side surface.

[0005]

FIG. 5 relates to a disc brake which uses a V-shaped spring made of wire to separate the pad from the rotor side surface. (1) As the pad lining wears, The elasticity of returning the pad increases. (2) When the lining wears, the pad is returned too much, the gap between the lining and the rotor side surface increases, and the stroke of the brake pedal increases. (3) Only one pad returns and drags the other pad. There is an inconvenience.

[0006] In addition, a micro-film disclosed in Japanese Utility Model Application No. Sho 62-193740 (Japanese Utility Model Application Laid-Open No. 1-98329) is disclosed in which a pad is returned by a spring piece when braking is released. This will be described later.

[0007]

SUMMARY OF THE INVENTION The present invention provides a U-shaped base that is inserted and attached to a U-shaped notch in a support;
A U-shaped pad holding portion that overlaps within the base and elastically holds the end of the pad is connected to a U-shaped pad holding portion by a spring portion that extends outward and is folded back along the support, and cuts the center of the front end of the base. By inserting a protruding piece formed by bending the end of the pad holding portion between the stoppers formed on both sides of the pad spring to form a pad spring for a disc brake, the pad spring excluding the disadvantages of the conventional pad clip is removed. I got it.

[0008]

The pad, whose end is elastically supported by the pad holding portion of the pad clip, is pushed by the claw portion of the piston and caliper during braking and is opposed to the elasticity of the spring portion to the side of the rotor together with the pad holding portion. Move toward.

The movement of the pad holding portion itself stops when its projection hits a stopper on the rotor side formed on the base portion.
If the gap between the lining and the rotor is large, the pad can slide on the pad holding portion and move further toward the rotor, and the lining can be sufficiently pressed against the side surface of the rotor. Therefore, as the lining wears, the pad moves from the holding portion to the rotor side. Part of the force applied to the pad during braking is transferred to the spring portion 1 via the holding portion.
3 is stored as the return force of the pad.

When the brake is released, the pad is held by the pad holding portion due to the spring portion, separates from the rotor side surface, and stops when the projection 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.
Since the pad comes out of the pad holding portion in accordance with the wear of the lining, the gap between the lining and the rotor side surface when braking is not performed can be made constant.

[0011]

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

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

[0013] base 12, upper piece 15, the lower piece 16, obtained by bending formed in an intermediate piece 17 U-shaped, the arms 18 held to the rotor axis direction both side portions of the upper piece 15, both side portions of the lower piece 16 The holding arm 19 is formed. The holding arm 19 can be omitted. The base 12 is inserted into the U-shaped notch 21 of the support 20 as shown in FIG. 2, and is attached to the support 20 by holding the upper and lower portions of the notch 21 by holding arms 18 and 19. The center of the tip of the upper piece 15 is cut into the stopper 22a,
22b is formed.

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 forms a U-shaped pad holding portion 14 slidably fitted in the U-shaped base portion 12 at the folded end.
At the end of the upper piece 23 of the holding portion 14, a protruding piece 24 inserted between the stoppers 22a, 22b of the upper piece of the base is folded up. The pad holding portion 14 elastically holds the rectangular end portion of the pad 25 shown by a chain line in FIG. Protruding piece 24
Is smaller 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 has one end of a support 20 formed in a gate shape with the rotor interposed therebetween, and the base 12 is fitted into the notch 21 to hold this end by holding arms 18 and 19. Mounted. As shown in FIG. 3, another pad clip is similarly attached to the opposite side of the support across the rotor. The operation of the pad clip on the opposite side is the same as that of the pad clip described above. When the brake is not applied, since the pad holding portion 14 is the spring portion 13, FIGS.
Move to the opposite side of the rotor as shown in FIG.
2a. The lining of the pad, the end of which is held by the holding portion 14, is separated from the rotor side surface.

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.
At the time of braking in which the pad is pressed against the side surface of the rotor, the pad holding portion 14 moves to the rotor side together with the pad against the elasticity of the spring portion 13, and the projection 24 first comes into contact with the stopper 22 b on the rotor side, and the holding portion 14 is moved. Stop. When the pad needs to be further protruded toward the rotor due to wear of the lining, the pad slides on the holding portion 14, and only the pad moves to sufficiently press the lining against the side surface of the rotor.

When the pressing of the pad by the piston is stopped to release the braking, the pad holding portion 14 separates from the rotor due to the elasticity of the spring portion 13 while holding the pad,
The projecting piece 24 comes into contact with the stopper 22a on the side opposite to the rotor and stops. As a result, the pad lining is held at an appropriate distance from the rotor side surface, and does not drag. Also, the pads do not move too far apart and do not hinder the return of the opposite pad. In addition, as shown by a chain line in FIG.
The lower piece 16 of the base can be extended to form an anti-rattle spring portion 26 that prevents rattling of the pad.

[0018]

[Effect of the invention] (1) The U-shaped pad holding part (14)
Since it is inserted into the U-shaped notch (21) of the support so as to overlap with the U-shaped base (12), the pad clip can be placed in a narrow space between the support and the pad end, and the gap between the support and the pad end can be formed. To increase the size of the disc brake.

(2) When the lining wears, the protrusion (2
Due to the abutment between 4) and one of the stoppers (22b), only the pad is pushed out from the pad holding portion during braking, and the gap with the rotor is automatically adjusted.

(3) When the brake is released, the pad is returned by the spring portion (13) to prevent dragging. However, due to the abutment between the projecting piece (24) and the other stopper (22a),
The return stroke of the pad is limited to keep the gap between the lining and the rotor constant. Therefore, it does not return excessively. Further, at this time, the pad does not slide in the pad holding portion, so that the return resistance can be reduced.

(4) Even if the lining is worn, only the pad advances to the rotor side, and the pad holding portion (14) remains at the original position. Therefore, the moving state of the pad holding portion at the time of braking and release does not change. Therefore, the return load of the pad does not change.

(5) A pad clip for a disc brake is also described in the microfilm of Japanese Utility Model Application No. Sho 62-193740 (Japanese Utility Model Application Laid-Open No. 1-98329).
In this device, since a fixed coupling portion for holding the pad and a friction engagement portion for pressing the friction material against the support are arranged side by side, it is necessary to widen a gap between the pad into which the pad is inserted and the support. Since the biasing device that separates the pad from the rotor at the time of release is inserted into the space between the pad and the rotor, the elasticity adjustment of the biasing device is inconvenient,
Its structure, operation and effect are different from the present invention.

[Brief description of the drawings]

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

FIG. 2 is a front view showing a state where the 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. 2;

FIG. 4 is a side view seen from the direction of arrow b in FIG. 2;

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

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Return spring 2 Leg part 3 Pad 4 Rotor 11 Pad clip 12 Base 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 Cut 22a Stopper 22b Stopper 23 Upper piece 24 Protrusion Piece 25 pad 26 anti-rattle spring

Claims (1)

(57) [Scope of request for utility model registration] 1. A holding arm (18) for holding a support is formed on both sides in the rotor axial direction of a base (12) formed by bending a spring plate into a U-shape, and the center of the distal end of the base is cut into both sides. Stoppers (22a) and (22b) are formed on the base, and a spring portion (13) extending along one side of the support from one side of the base (12) is folded back to form a U-shape that overlaps with the end inside the base (12). A pad holding portion (14) for elastically holding the end of the pad is formed, and the stoppers (22a) (22) are provided at the tip of the pad holding portion (14).
b) A pad clip for a disc brake formed by bending a protruding piece (24) inserted with a gap therebetween.