JPH11325133A - Disk brake device for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a disk brake device for vehicles capable of surely preventing the breakage of a pad clip caused by the hooking of a noise preventive shim to a side edge for positioning. SOLUTION: In a disk brake device for vehicles in which a shim 35 is positioned in the circumferential direction of a rotor by butting a side edge 35b for positioning of the noise preventive shim 35 laminated on a back plate 23 of a friction pad to a side edge 35b for positioning, the width W0 of a shim contact part 15d is set to be larger than the width of the side edge 35b for positioning so that the side edge 35b for positioning is not projected from the shim contact part 15d.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention
More specifically, the present invention relates to a pad clip laid on a pad guide portion of a support for supporting a pair of friction pads sandwiching a rotor movably in an axial direction of the rotor. It is.

[0002]

2. Description of the Related Art Generally, a floating caliper type disc brake device 10 for a vehicle, as shown in FIGS. 7 and 8, has a pair of friction pads 3 and 4 opposed to each other with a rotor 1 interposed therebetween. A caliper 9 formed on one side has a cylinder portion 7 for accommodating a piston 5 for pressing the pair of friction pads 3 and 4 against the rotor 1, and the caliper 9 is fixed to the vehicle body side and the caliper 9 is moved in the axial direction of the rotor 1. And a support 11 for floating support so as to be movable.

[0003] The piston 5 is operated by hydraulic pressure supplied to the cylinder portion 7 in response to a brake operation, and presses the friction pad 3 against the rotor 1. The pair of friction pads 3 and 4 includes a lining portion 22 that is pressed against the surface of the rotor 1 to generate a predetermined frictional force, and a back plate 23 that is fixedly mounted on the back surface side of the lining portion 22 and functions as a mounting bracket or the like. And the ears 2 protruding from both sides of the back plate 23
3 a is supported by the pad guide portion 31 of the support 11. 9 to 1 are attached to the back plate 23 of each of the friction pads 3 and 4.
As shown in FIG. 1, the thin plate-shaped squeal prevention shims 35 are assembled in a stacked state. The shim 35 is fixed to the back plate 23 by caulking a crimping claw 35 a extending vertically to the edge of the back plate 23.

[0004] The support 11 has a mounting hole 2 for fixing to the vehicle body.
6 and a supporting arm 28 erected on both sides of the connecting portion 27. As shown in FIG. 9, a pad clip 4 made of sheet metal is provided on the inner surface of each support arm 28.
A pad guide portion 31 is formed to support the pair of friction pads 3 and 4 movably in the axial direction of the rotor 1 via the first and second friction pads.

The pad clip 40 is shown in FIGS.
As shown in FIG. 7, a pair of groove-shaped bent portions 41 fitted into the pad guide portions 31 of the support arms 28 of the support 11 and a connecting portion 42 connecting the bent portions 41 to each other are integrally formed by a metal plate. It is formed. Each of the bent portions 41 is formed of an ear 2 formed on both sides of the back plate 23 of the friction pad 3 or 4.
The elastic piece 41 for holding the lug 23a of the back plate 23 on the lower wall 41a of the bent portion 41 so that the friction pads 3 and 4 do not rattle.
b is formed to extend. The side wall 41c of the bent portion 41 to which the ear 23a fits is provided with a shim contact portion 41d extending along the rotor axis direction. The shim contact portion 41d performs positioning of the shim 35 in the rotor circumferential direction by moving the squeal prevention shim 35 in the direction of the arrow (a) in FIG. 13 and abutting the positioning side edge 35b of the shim 35. It is used to prevent shim misalignment.

[0006] The vehicle disk brake device 10 having the above-described configuration includes the caliper claw 3 provided on the other side of the caliper 9.
3 regulates the back surface of the friction pad 4 on the outer side,
When the inner friction pad 3 is pressed by the piston 5, the rotor 1 is pressed by the pair of friction pads 3 and 4 to obtain a braking force. Lining part 2 of friction pads 3 and 4
When 2 wears, the piston 5 advances in the cylinder portion 7 toward the rotor 1 accordingly, and the interval between the piston 5 and the caliper claw 33 is reduced.

[0007]

By the way, in the above-described disc brake device 10 for a vehicle, as shown in FIG.
1 is smaller than the width W2 of the positioning side edge 35b of the shim 35 to be in contact with, for example, when a new friction pad is attached, the positioning side edge 35b is connected to the shim contact portion 41d.
When the friction pads 3 and 4 are displaced in the axial direction of the rotor due to a braking operation or the like, a portion of the positioning side edge 35b protrudes from the shim contact portion 41d. Edge 4 near shim contact portion 41d
1e etc., and the pad clip 40
There is a possibility that an accident such as breakage of the cable may occur.

The present invention has been made in view of the above circumstances, and a positioning side edge of a squeal prevention shim that abuts against a shim contact portion of a pad clip to perform positioning of the squeal prevention shim when the friction pad is displaced. An object of the present invention is to provide a disc brake device for a vehicle which can reliably prevent breakage of a pad clip due to catch of a positioning side edge of a squeal prevention shim without being caught near a shim contact portion.

[0009]

A disk brake device for a vehicle according to the present invention for achieving the above object is provided so as to protrude from both sides of a back plate of a pair of friction pads opposed to each other with a rotor interposed therebetween. At the same time that the ears are supported on the pad guides formed on the support via pad clips,
The pad clip is provided with a shim contact portion for positioning the shim in the rotor circumferential direction by abutting a positioning side edge of a squeal prevention shim stacked and mounted on the back plate of the friction pad. In the disk brake device for a vehicle having the friction pad movably supported in the axial direction of the rotor, the pad clip does not protrude the positioning side edge of the shim contacting from the shim contact portion. As described above, the width dimension of the shim contact portion is set to be larger than the width dimension of the positioning side edge.

According to the above construction, even when the positioning side edge of the squeal prevention shim is brought into contact with the shim contact portion of the pad clip when a new friction pad is attached, a part of the positioning side edge is shim. It does not protrude from the contact. Therefore, when the friction pad is displaced in the rotor axis direction by a subsequent braking operation or the like, the positioning side edge of the squeal prevention shim does not catch near the shim contact portion, and the positioning side edge of the squeal prevention shim catches. Can reliably prevent the pad clip from being broken.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of a disk brake device for a vehicle according to the present invention will be described below in detail with reference to the drawings. 1 to 6 show an embodiment of a vehicle disk brake device according to the present invention. FIG. 1 is a plan view of an embodiment of the vehicle disk brake device according to the present invention, and FIG. FIG. 3 is a view taken in the direction of arrow C, and FIG.
FIG. 4 is an exploded perspective view showing a relationship between a back plate of a friction pad and an engaging portion of a pad clip in the vehicle disk brake device shown in FIG. 1; FIG. 5 is a vehicle shown in FIG. FIG. 6 is a front view of a pad clip in the disc brake device for a vehicle, and FIG. 6 is a perspective view showing an engagement state between a back plate of a friction pad and the pad clip in the disc brake device for a vehicle shown in FIG.

A disk brake device 10 for a vehicle according to one embodiment has a pair of friction pads 3 and 4 which are arranged opposite to each other with a rotor 1 interposed therebetween, and a pair of friction pads 3 and 4 for pressing the pair of friction pads 3 and 4 against the rotor 1. A structure including a caliper 9 formed on one side with a cylinder portion 7 for accommodating the piston 5 and a support 11 fixed to the vehicle body and floatingly supporting the caliper 9 so as to be movable in the axial direction of the rotor 1. Then, the piston 5 is operated by the hydraulic pressure supplied to the cylinder portion 7 in response to the brake operation, and the friction pad 3 is pressed against the rotor 1.

In the vehicle disk brake device 10 of the present embodiment, the structures of the rotor 1, the friction pads 3, 4, the caliper 9, and the support 11 are exactly the same as those of the prior art shown in FIGS. is there. In addition, each friction pad 3,
As shown in FIG. 4, a squeal prevention shim 35 on a thin plate is assembled on the back plate 23 of No. 4 in a stacked state. This shim 35
Also, it has the same structure as the conventional one, and is fixed to the back plate 23 by caulking a crimping claw 35 a formed to extend vertically and to the edge of the back plate 23. The same components as those of the related art are denoted by the same reference numerals as those of the related art, and description thereof will be omitted or simplified.

The support 11 has a mounting hole 2 fixed to the vehicle body.
6 and a support arm 28 erected on both sides of the connection portion 27. The pad guide portion 31 formed on the inner surface of each support arm 28 is fitted with the pad clip 14 made of sheet metal. The pad guide portion 31 is connected to the friction pad 3 via the pad clip 14,
Each of the friction pads 3, 4 is guided movably in the axial direction of the rotor 1 by supporting the ear portions 23 a on both sides of the back plate 23.

As shown in FIGS. 4 to 6, the pad clip 14 has a pair of groove-shaped bent portions 15 fitted into the pad guide portions 31 of the support arms 28 of the support 11, and these bent portions 15 The connecting portion 16 for communicating with each other is formed integrally with a metal plate. Each bent portion 15 has an ear portion 23 formed on both sides of the back plate 23 of each of the friction pads 3 and 4.
a slidable in the axial direction of the rotor, and elastic pieces 15b sandwiching the ears 23a of the back plate 23 on the lower wall 15a of the bent portion 15 so that the friction pads 3 and 4 do not rattle.
Are formed to extend.

The outer edge of the side wall portion 15c of the bent portion 15 into which the ear portion 23a fits is shifted by the shim 35 in the direction of arrow (b) in FIG. By contacting the shim 35b, the shim 35 functions as a shim contact portion 15d for positioning the shim 35 in the circumferential direction of the rotor, and is used for preventing the shim 35 from being displaced. The shim contact portion 15d is formed by extending the outer edge of the side wall portion 15c along the rotor axial direction while keeping the same width dimension W0 as the side wall portion 15c. That is, the width dimension of the shim contact portion 15d of the pad clip 14 is W0, which is larger than the width dimension of the ear portion 23a of the back plate 23 fitted to the bent portion 15, and, of course, the positioning side edge 35b of the shim 35. Is larger than the width W1, and a part of the positioning side edge 35b does not protrude from the shim contact portion 15d. As shown in FIG. 5, when the new friction pads 3 and 4 are attached, the shim 35 provided on the back plate 23 of the friction pads 3 and 4 is connected to the shim contact section 15d. The extension length in the rotor axis direction is set so as to enter the inside of the rotor axis direction by an appropriate dimension s from the edge of 15d.

According to the above construction, even when the positioning side edge 35b of the squeal prevention shim 35 is brought into contact with the shim contact portion 15d of the pad clip 14 when the new friction pads 3 and 4 are attached, the shim contact portion can be formed. Since the width dimension W0 of the 15d is large, a part of the positioning side edge 35b is
It does not protrude. Therefore, when the friction pad is displaced in the rotor axis direction by a subsequent braking operation or the like, the positioning side edge 35b of the squeal prevention shim 35 does not catch on the vicinity of the shim contact portion 15d. Pad clip 1 due to hooking of side edge 35b
4 can be reliably prevented.

The mounting form of the elastic piece 15b of the bent portion 15 of the pad clip 14 is not limited to the above embodiment.
It goes without saying that the specific structure of each of the other components can be appropriately changed in design without departing from the spirit of the present invention.

[0019]

According to the disc brake device for a vehicle of the present invention, even when the positioning side edge of the squeal prevention shim is brought into contact with the shim contact portion of the pad clip when a new friction pad is attached or the like, the positioning side can be used. Part of the edge does not protrude from the shim contact. Therefore, when the friction pad is displaced in the rotor axis direction by a subsequent braking operation or the like, the positioning side edge of the squeal prevention shim does not catch near the shim contact portion, and the positioning side edge of the squeal prevention shim catches. Can reliably prevent the pad clip from being broken.

[Brief description of the drawings]

FIG. 1 is a plan view of one embodiment of a vehicle disk brake device according to the present invention.

FIG. 2 is a view taken in the direction of arrow C in FIG. 1;

FIG. 3 is a sectional view taken along the line DD in FIG. 2;

FIG. 4 is an exploded perspective view showing a relationship between a back plate of a friction pad and an engaging portion of a pad clip in the vehicle disk brake device shown in FIG. 1;

FIG. 5 is a front view of a pad clip in the vehicle disc brake device shown in FIG. 1;

FIG. 6 is a perspective view showing an engagement state between a back plate of a friction pad and a pad clip in the vehicle disc brake device shown in FIG. 1;

FIG. 7 is a side view of a conventional vehicle disk brake device.

FIG. 8 is a sectional view taken along the line AA of FIG. 7;

9 is an explanatory diagram of a support structure of a friction pad in a support of the vehicle disk brake device shown in FIG. 7;

FIG. 10 is a cross-sectional view of the friction pad shown in FIG. 9, taken along line BB.

FIG. 11 is a perspective view of a squeal prevention shim laminated and mounted on the back plate on the friction pad.

12 is an exploded perspective view showing a relationship between a back plate of a friction pad and an engaging portion of a pad clip in the vehicle disc brake device shown in FIG. 7;

13 is a perspective view showing an engagement state between a back plate of a friction pad and a pad clip in the vehicle disk brake device shown in FIG. 7;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Rotor 3, 4 Friction pad 9 Caliper 11 Support 14 Pad clip 15 Bend part 15a Bend part 15b Elastic piece 15c Side wall part 15d Shim contact part 23 Back plate 23a Ear part 31 Pad guide part 35 Squeak prevention shim 35b Positioning side edge

Claims (1)

[Claims] 1. A pair of friction pads arranged opposite to each other with a rotor interposed therebetween, and ears projecting from both sides of a back plate are supported by a pad guide formed on a support via a pad clip. The pad clip is provided with a shim contact portion for positioning the shim in the rotor circumferential direction by abutting a positioning side edge of a squeal prevention shim stacked and mounted on the back plate of the friction pad. Have
In the vehicle disc brake device supporting the friction pad movably in the axial direction of the rotor, the pad clip is such that a positioning side edge of the shim that comes into contact does not protrude from the shim contact portion.
A width of the shim contact portion is set to be larger than a width of the positioning side edge.