JPH08170666A - Pad support spring for disk brake - Google Patents

Abstract

PURPOSE: To improve a yield rate of a shim material and to improve damping performance of a shim. CONSTITUTION: In pad support springs 20, 50 for a disk brake fixed to back plates 11, 41 of pads 10, 40 to fix these pads relating to a cylinder 30 or a piston 60, holding parts 22, 23, 52, 53 are provided in the pad support spring, to elastically hold a shim 80, interposed between the pad support spring and the back plate, by these holding parts.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pad support spring for a disc brake which is fixed to a back metal of a pad to fix the pad to a cylinder or a piston.

[0002]

2. Description of the Related Art A pad support spring for a disc brake is disclosed in, for example, Japanese Utility Model Publication No. 1-35958, in which the pad support spring is used to fix an outer pad to a cylinder (caliper). The pad support spring is equipped with two legs on the outer periphery of the elliptical plate portion, and is fitted and fixed to the angular protrusion provided on the back metal of the outer pad by the elliptical plate portion. In addition, the distal end portions of both legs are engaged with the reaction force arm portion of the cylinder.

[0003]

The pad support spring of the above publication is fixed only to the back metal of the outer pad and is used only for fixing the pad to the cylinder. The pad support spring is interposed between the pad support spring and the back metal. The shim to be mounted is fixed to the back metal separately from the pad support spring. For this fixing, the shim has a claw engaged with the rotor outer peripheral side and a claw engaged with the rotor inner peripheral side of the back metal. Are formed respectively. By the way, if the claws that engage with the rotor outer peripheral side of the back metal and the claws that engage with the rotor inner peripheral side are formed on the shim, the material yield of the shim obtained by punching from the thin plate is poor, which is uneconomical. . Further, in order to properly fix the shim to the back metal, it is necessary to form a groove in the back metal with which the above-mentioned claws of the shim engage.

[0004]

In order to solve the above-mentioned problems, the present invention provides a pad support spring for a disc brake, which is fixed to a back metal of a pad to fix the pad to a cylinder or a piston. The support spring is provided with a holding portion, and the holding portion elastically holds the shim interposed between the pad support spring and the back metal.

[0005]

In the pad support spring for a disc brake according to the present invention, the holding portion provided on the pad support spring repels the shim interposed between the pad support spring and the back metal. Since the shim can be held, it is not necessary to provide each claw for fixing the shim to the back metal (a claw that engages with the rotor outer peripheral side of the back metal and a claw that engages with the rotor inner peripheral side) of the shim. The material yield can be improved, and the shim can be properly assembled to the back metal without forming a groove in the back metal with which the above-mentioned claws of the shim engage. Also, since the shim is elastically held between the pad support spring and the back metal, and the shim has a greater degree of freedom than the case where the shim is fixed to the back metal with the above-mentioned claws, the shim has a greater degree of freedom. The damping performance can be fully exerted.

[0006]

An embodiment of the present invention will be described below with reference to the drawings. The outer pad 10 shown in FIGS. 1 and 2 is fixed to the reaction arm portion 31 of the cylinder 30 by the pad support spring 20 made of a spring steel plate, and the outer pad 10 shown in FIG.
The inner pad 40 shown in FIG. 2 is fixed to the piston 60 by a pad support spring 50 made of a spring steel plate, and the disc rotor 90 is fixed by the pads 10 and 40.
By sandwiching (see FIG. 1), a braking force can be obtained as is well known. The cylinder 30 is attached to the mounting 70 by a known means so as to be movable in the cylinder axial direction. The piston 60 is axially slidably attached to the inner hole 32 of the cylinder 30 via a seal ring 33, and the sliding portion is sealed by a dust seal 34.

As shown in FIGS. 1 to 4, the outer pad 10 is provided with a back metal 11 and a lining 12, and the back metal 11 has fitting holes 31a and 31b formed in a reaction arm portion 31 of a cylinder 30. Protrusions 11a, 11b that fit into the
And the pins 11c and 11 for positioning and fixing the shim 80 and the pad support spring 20 are formed.
A pin 11e for crimping and fixing d and the pad support spring 20 is formed.

The shim 80 is a back metal 11 of the outer pad 10.
And the reaction force arm portion 31 of the cylinder 30 are interposed to damp vibrations that cause brake squeal.
6 and the second plate 82 shown in FIG. 6 interposed between the first plate 81 and the back metal 11.
It is composed by. The first plate 81 is made of a stainless steel thin plate, and has holes 81a, 81b, 81c, 81d at portions corresponding to the columnar protrusions 11a, 11b and the pins 11c, 11d of the outer pad 10, and a portion corresponding to the pin 11e. Has a rectangular hole 81e, and has claws 81f and 81g that engage with the rotor outer peripheral side end surface of the back metal 11. On the other hand, the second plate 82
Is a thin metal plate coated with rubber on the front and back, and is coated with grease.
Holes 8 are provided at the portions corresponding to a, 11b and pins 11c, 11d.
2a, 82b, 82c, 82d, and a rectangular hole 82e at a portion corresponding to the pin 11e,
Moreover, it has many slits 82f. The cylindrical projections 11a, 11b and the holes 81a, 81b, 82a, 8
2b, and pins 11c and 11d and holes 81c and 81
An annular gap is formed between d, 82c and 82d.

The pad support spring 20 is shown in FIGS.
As shown in FIGS. 3 and 7 to 9, the mounting portion 21, the holding portions 22 and 23, and the legs 24 and 25 are integrally provided, and the pin 11e of the backing metal 11 penetrates through the mounting portion 21. Has a mounting hole 21a formed therein, and the holding portion 23 has an arcuate notch 23 with which the pins 11c and 11d of the backing metal 11 engage.
a and 23b are formed. The pad support spring 20 is assembled to the back plate 11 together with the shim 80, and after the assembly, the tip of the pin 11e is swaged to be fixed to the back metal 11. Mounting part 21
Is a portion that fits into each of the rectangular holes 81e, 82e of the shim 80 and contacts the back surface of the backing metal 11, and is flush with the shim 80. Each of the holding portions 22 and 23 elastically holds the shim 80, and is in contact with the center back surface of the shim 80, that is, around the rectangular holes 81e and 82e. Each of the legs 24 and 25 extends from the holding portion 23 and is elastically engaged with the reaction force arm portion 31 at the tip portion.

As shown in FIGS. 2 and 10, the inner pad 40 is provided with a back metal 41 and a lining 42 for positioning and fixing the shim 80 and the pad support spring 50 having the above-mentioned configuration on the back metal 41. Pin 41
Pins 41c and 41d for crimping and fixing a and 41b and the pad support spring 50 are formed. In the inner pad 40 shown in FIG. 10, the piston 60 is displaced leftward in the drawing so that it comes into contact with the inner pad 40. Therefore, the pad support spring 50 has the pins 41a and 41a.
The pad support spring 50 is attached using the pins 41b and 41d when the piston 60 is displaced to the right in the drawing and comes into contact with the piston 60. Also, the back metal 4 of the inner pad 40
1 has an ear portion 41 for mounting to the mounting 70.
e, 41f are formed.

As shown in FIGS. 2 and 10, the pad support spring 50 has a mounting portion 51 and a holding portion 52,
53 and legs 54, 55, 56 are integrally provided, and a mounting hole 51a through which the pin 41c (or 41d) of the backing metal 41 penetrates is formed in the mounting portion 51, and the holding portion 5 is also provided.
An arcuate notch 53a with which the pin 41a (or 41d) of the backing metal 41 is engaged is formed in 3. The pad support spring 50 is assembled to the back plate 41 together with the shim 80, and after the assembly, the tip of the pin 41c is swaged to be fixed to the back metal 41. The mounting portion 51 is a portion that fits into the rectangular holes 81e and 82e of the shim 80 and contacts the back surface of the backing metal 41.
It is on the same plane as. Each holding portion 52, 53 has a shim 8
0 is elastically held, and abuts on the central back surface of the shim 80, that is, around the rectangular holes 81e and 82e. Each of the legs 54, 55, 56 extends from the holding portion 52 and the mounting portion 51, and has a piston 60 at the tip.
It is elastically engaged with the annular groove 61 formed in.

In the pad support springs 20 and 50 of the present embodiment having the above-mentioned structure, the holding portions 22 and 2 provided on the pad support springs 20 and 50, respectively.
Each pad support spring 2 at 3, 52, 53
Each shim 80 interposed between 0, 50 and each back metal 11, 41
Since each of the shims 80 can be elastically held, each of the shims 80 has a claw (each claw 8 for fixing the same shim to the back metal 11 and 41).
It is not necessary to provide claws which engage with the inner peripheral side of the rotor facing 1f and 81g, and the material yield of each shim 80 can be improved, and each claw of each shim 80 can be attached to each backing metal 11, 41. Each shim 80 can be accurately assembled to each backing metal 11 and 41 without forming a groove in which 81f and 81g engage. Further, each shim 80 is elastically held between each pad support spring 20, 50 and each back metal 11, 41, and each shim 80 has each claw (a claw that engages with the rotor outer peripheral side of the back metal and the rotor). Since the degree of freedom of each shim 80 is large as compared with the case of being fixed to each backing metal 11, 41 by a claw engaged with the inner peripheral side), the damping performance of each shim 80 can be sufficiently exhibited. .

In the above embodiment, each shim 80 is provided with each claw 81f, 81g, but each claw 81f, 81g is provided.
It is also possible to carry out without g. In this case, the material yield of each shim 80 can be further improved as compared with the above embodiment.

[Brief description of drawings]

FIG. 1 is a front view of a disc brake including a disc brake pad support spring according to the present invention.

2 is a sectional view of the disc brake shown in FIG. 1, taken along line 2-2. FIG.

FIG. 3 is a front view showing the relationship between the outer pad, the shim, and the pad support spring shown in FIGS. 1 and 2.

FIG. 4 is a central longitudinal side view of the outer pad alone shown in FIGS. 1 and 2.

5 is a front view of the first plate alone of the shim shown in FIGS. 1 and 2. FIG.

6 is a front view of a single second plate of the shim shown in FIGS. 1 and 2. FIG.

7 is a front view of the outer pad support spring alone shown in FIGS. 1 to 3. FIG.

8 is a bottom view of the outer pad support spring alone shown in FIGS. 1 to 3. FIG.

9 is a central longitudinal side view of the outer pad support spring alone shown in FIGS. 1 to 3. FIG.

10 is a front view showing the relationship between the inner pad, shim and pad support spring shown in FIG. 1. FIG.

[Explanation of reference numerals] 10, 40 ... Pads, 11, 41 ... Back metal, 20, 50 ...
Pad support springs, 21, 51 ... Mounting part, 2
2, 23, 52, 53 ... Holding portion, 24, 25, 54, 5
5, 56 ... Legs, 30 ... Cylinder, 31 ... Reaction force arm, 60 ... Piston, 70 ... Mounting, 80 ... Shim, 90 ... Disk rotor.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Otsuno Nakajima 2-1, Asahi-cho, Kariya city, Aichi Prefecture Aisin Seiki Co., Ltd.

Claims (1)

[Claims] 1. A pad support spring for a disc brake, which is fixed to a back metal of a pad to fix the pad to a cylinder or a piston, wherein a holding portion is provided on the pad support spring, and the pad support is provided at the holding portion. A pad support spring for a disc brake, wherein a shim interposed between the spring and the back metal is elastically retained.