JP2002250375A - Pad for disc brake - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an inexpensive pad for a disc brake having a large brake noise prevention effect. SOLUTION: The thickness in the rotating shaft direction of a disc rotor 14 of a torque receiving part 11a of a back plate 11 is made thicker than that of a main body pat 11b except the torque receiving part 11a of the back plate 11.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pad for a disc brake used for a disc brake.

[0002]

2. Description of the Related Art The performance of disc brakes is evaluated in terms of both braking performance and sensibility, but in recent years automobiles have become more sophisticated, and there is a tendency to improve sensibility. For this reason, disc brake pads not only improve braking performance such as high friction coefficient, thermal stability of friction coefficient, mechanical strength and thermal strength, but also reduce and prevent brake squeal and frictional vibration such as judder. There is a demand for improved sensitivity performance.

Here, the cause of the brake squeal is not always clear, but it is known that the brake squeal is unlikely to occur when the bending stiffness of the disc brake pad is low. A disc brake pad provided with a reduced backing plate rigidity has been put to practical use.

[0004]

However, the above-mentioned conventional disc brake pad requires extra processing for providing a plurality of through holes in the back plate, thereby increasing the cost and bending the back plate in the thickness direction. There was a problem that the rigidity could not be reduced so much and the brake squeak prevention effect was small.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a disc brake pad which is inexpensive and has a large brake squeak prevention effect.

[0006]

In order to solve the above technical problem, as set forth in claim 1, a lining member that slides on a surface of the disk rotor to suppress rotation of the disk rotor, and a lining member. And a back plate having, at both ends, a torque receiving portion that is integrally fixed to the back surface of the vehicle and that is inserted into the vehicle-side fixing portion and that transmits the brake torque to the vehicle side. The thickness of the disk rotor rotation axis direction,
A pad for a disc brake is characterized in that it is thicker than a body portion of the back plate other than the torque receiving portion.

According to the first aspect of the invention, the thickness of the torque receiving portion in the direction of the rotation axis of the disk rotor can be sufficiently ensured, so that a torque receiving portion having a sufficient strength against the brake torque can be constituted. Further, since the thickness of the main body to which the lining member is fixed can be reduced, the bending stiffness in the thickness direction of the disc brake pad formed by the lining member and the back plate is reduced, and brake squeal is prevented.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described specifically with reference to embodiments.

FIGS. 1 and 2 show a pad 10 (disc brake pad) according to a first embodiment of the present invention. FIG. 2 is a view shown by arrows in FIG. FIGS. 3 and 4 show the pad 10 of the first embodiment, the piston 17 for pressing the pad 10 in the direction of the disk rotor 14,
FIG. 5 is a diagram showing a positional relationship between the claw portion 19 and the claw portion 19.

1 to 4, a disc brake 1 includes a disc rotor 14 that rotates integrally with a wheel (not shown), a pair of pads 10 that are arranged opposite to each other with the disc rotor 14 interposed therebetween, and a non-rotating A mounting 9 (vehicle-side fixing portion) which is fixed to a portion (not shown) with bolts and directly receives a brake torque applied to the pad 10;
The caliper 18 includes a caliper 18 supported by the mounting 9 so that the disk rotor 14 can slide in the axial direction, and a piston 17 slidably and liquid-tightly disposed in a cylinder bore of the caliper 18.

The pad 10 has a lining member 12 fixed to the surface of a back plate 11 made of a steel plate by molding. As shown in FIGS. 3 and 4, the lining member 12 of the pad 10 is pressed against the side surface of the disk rotor 14 when the piston 17 or the claw 19 of the caliper 18 presses the main body 11 b of the back plate 11 described later. You.

The back plate 11 has a torque receiving portion 11a whose thickness in the rotation axis direction of the disk rotor 14 is A, a lining member 12 fixed by molding, and a thickness of the disk rotor 14 in the rotation axis direction. And a main body 11b which is B.

The torque receiving portion 11a is provided with a hole 9 of the mounting 9 for directly receiving the brake torque applied to the pad 10.
a, but the thickness A as the contact length with the hole 9a
Is selected to ensure sufficient strength for the braking torque. Therefore, a highly reliable torque receiving portion can be obtained.

The thickness B of the main body 11b to which the lining member 12 is fixed can be selected independently of the thickness A of the torque receiving portion 11a. Therefore, the thickness B of the main body 11b
In the thickness direction of the pad formed by the lining member and the back plate, and thereby the brake squeal can be prevented.

Next, a second embodiment of the present invention will be described with reference to FIGS. 5 and 6,
1 and 2 are denoted by the same reference numerals as those in FIGS. 1 and 2, and redundant description is omitted.

5 and 6, the torque receiving portion 11
c is provided so as to protrude toward the disk rotor 14 with respect to the main body 11b.

The pad 10 is inserted into the hole 9a of the mounting 9 which directly receives the brake torque applied to the pad 10, and the thickness A as the contact length with the hole 9a guarantees sufficient strength against the brake torque. To be selected. Therefore, a highly reliable torque receiving portion can be obtained.

Further, the thickness B of the main body 11b to which the lining member 12 is fixed can be selected independently of the thickness A of the torque receiving portion 11a. Therefore, the thickness B of the main body 11b
In the thickness direction of the pad formed by the lining member and the back plate, and thereby the brake squeal can be prevented.

As described above, in the second embodiment, the torque receiving portion 11c projects toward the disk rotor 14 with respect to the main body portion 11b, that is, the torque receiving portion 11c holds both ends of the lining member 12. Therefore, the thickness of the pad 10 in the rotation axis direction of the disk rotor 14 can be reduced.

As described above, the present invention has been described with reference to the embodiments. However, the present invention is not limited to the above embodiments, but includes various embodiments according to the principle of the present invention.

In each of the above embodiments, the principle of the present invention is applied to a single cylinder type (caliper floating type) disk brake. However, the present invention is not limited to this. It is also possible to apply to a so-called opposed cylinder type disc brake which is pressed by the piston 17 from both sides.

[0022]

According to the present invention, it is possible to provide a disc brake pad which is inexpensive and has a large brake squeak prevention effect.

[Brief description of the drawings]

FIG. 1 is a view showing a relationship between a first embodiment of a disc brake pad according to the present invention and a disc rotor.

FIG. 2 is an arrow view in FIG.

FIG. 3 is a view showing a relationship between a first embodiment of a disc brake pad according to the present invention and a piston.

FIG. 4 is a view showing the relationship between the first embodiment of the disc brake pad according to the present invention and the claw portion of the caliper.

FIG. 5 is a view showing a relationship between a disc brake pad according to a second embodiment of the present invention and a disc rotor.

FIG. 6 is a view as seen from the arrow in FIG. 5;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Disc brake 9 Mounting (vehicle side fixed part) 10 Pad (disc brake pad) 11 Back plate 11a, 11c Torque receiving part 11b Body part 12 Lining member 14 Disk rotor

Claims (1)

[Claims] 1. A lining member which slides on a surface of a disk rotor to suppress rotation of the disk rotor, and a brake torque which is integrally fixed to a back surface of the lining member and is inserted into a vehicle-side fixing portion. And a back plate having at both ends a torque receiving portion that transmits torque to the vehicle side, wherein the thickness of the torque receiving portion in the direction of the disk rotor rotation axis is other than the torque receiving portion of the back plate. A disc brake pad characterized by being thicker than the main body.