JPH059535Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a disc brake.

PRIOR TECHNOLOGY A pair of pads are arranged on both sides of a disc rotor and have a back metal and a friction material fixed thereto, and brake the disc rotor by compressing the disc rotor. Disc brakes are known which include a torque plate having a pad receiving notch that is movably accommodated in parallel directions.

Problems to be Solved by the Invention Incidentally, in such a disc brake, normally, the problem is based on the contact between the side end face of the backing plate facing the disc rotor circumferential direction and the side wall of the pad housing notch facing the disc rotor circumferential direction. hand,
The braking torque generated in the pads is received by the torque plate, and the abutting portion between the side end surface of the back metal and the side wall of the pad housing notch is separated from the braking surface of the disc rotor by the thickness of the friction material. They are usually separated by a relatively large distance. Therefore, during braking, a relatively large rotational force is applied to the pad in the direction of approaching the disc rotor using the abutting portion as a fulcrum, and due to this rotational force, the pad is rotated against the axis of the disc rotor. There have been cases in which brake squeal is caused by vibration in a direction substantially parallel to the center of the disc, or the friction material is unevenly worn in the circumferential direction of the disc rotor.

The present invention was developed against the background of the above circumstances, and its purpose is to reduce noise and uneven wear caused by the rotational force acting on the pads in the direction approaching the disc rotor during braking. The purpose is to provide disc brakes.

Means for Solving the Problems In order to achieve the above object, the present invention provides a disc brake as described above, in which a pad is provided on a side end surface of the pad opposite to a circumferential direction of the disc rotor in a substantially circumferential direction of the disc rotor. The disc rotor has a pair of tapered surfaces that protrude from each other and are inclined toward each other toward the protruding end on both side surfaces facing in the radial direction of the disc rotor. A notch is provided in the side wall of the accommodation notch facing the circumferential direction of the disc rotor so that the protrusion is taperedly fitted on the pair of tapered surfaces, and the protrusion is formed on the pad through the back metal and friction material that constitute the protrusion. The present invention is characterized in that the braking torque is received by the torque plate.

Operation and Effect of the Invention With this structure, the protruding portion made of a backing metal and a friction material, which is protruded from the side end surface of the pad, is tapered into the notch provided in the side wall of the pad receiving notch at the pair of tapered surfaces. When the pads are fitted together, the braking torque generated on the pad is received by the torque plate through the back metal and the friction material that make up the protruding part. The braking torque can also be received by the torque plate. In this case, when the braking torque is received by the torque plate via the friction material of the protrusion, the friction material of the protrusion is compressed in the direction in which the pair of tapered surfaces approach each other, so that the friction Since the density of the material is increased and the amount of elastic deformation of the friction material can be suitably controlled, braking torque can be effectively received by the torque plate via the friction material. In this way, the torque plates can absorb the braking torque generated on the pads even through the friction material located closer to the disc rotor than the backing plate, so the disc rotor is able to absorb the braking torque that is applied to the pads during braking. The rotational force in the direction approaching can be suitably reduced. As a result, it is possible to suppress the vibration of the pad in a direction substantially parallel to the axis of the disk rotor, effectively suppressing brake squeal, and also effectively suppressing uneven wear of the friction material in the circumferential direction of the disk rotor. obtain.

Embodiment Hereinafter, an embodiment of the present invention will be described in detail based on the drawings.

1 and 2 are diagrams showing the main parts of a disc brake to which the present invention is applied, in which 10 is a caliper disposed straddling the outer periphery of the disc rotor 12, and 14 is a torque It is a plate. The caliper 10 includes a cylinder portion 18 in which a cylinder bore 16 is formed, and the cylinder portion 1
A bifurcated claw portion 2 extends integrally from 8 and faces the cylinder portion 18 with the disc rotor 12 in between.
0, and the cylinder bore 16
A piston 22 is fitted within the disc rotor 12 so as to be able to protrude toward the disc rotor 12. The torque plate 14 includes a fixed part 24 and a disc rotor 1 on both sides in the circumferential direction of the disc rotor 12 of the fixed part 24.
2, the fixing portions 24 extend integrally from the portions located on the outer circumferential side, with the disk rotor 12 in between.
A pair of opposing parts 26, 26 facing each other, and a reinforcing part 27 that connects and reinforces the opposing parts 26, 26 with each other.
A pair of slide pins (not shown) protruding in a direction parallel to the axis of the disc rotor 12 allows the caliper 10 to align with the axis of the disc rotor 12 on both sides of the disc rotor 12 in the circumferential direction of the cylinder portion 18. It is supported so that it can move in a direction parallel to the center.

The fixing portion 24 of the torque plate 14 has a first
2, and 4, a pad accommodating notch 28 is formed that opens toward the outer circumference of the disk rotor 12, and an opposing portion 26,
A pad accommodating notch 30 is formed between the pad accommodating notches 26 and communicating with the pad accommodating notch 28 . Inside these pad accommodation notches 28 and 30, a piston 22 is provided.
A pair of pads 32 and 34 disposed on both sides of the disc rotor 12 between the disc rotor 12 and the claw part 20 are housed so as to be movable in a direction parallel to the axis of the disc rotor 12.

As shown in FIGS. 1 to 3, the pads 32 and 34 have a substantially rectangular shape, and are manufactured by molding a mixture of asbestos, resin, etc. with the backing metal 36, and are fixed to the backing metal 36. and a friction material 38. Padded 32,3
A pair of protrusions 40 made of a backing metal 36 and a friction material 38 are provided at the inner circumferential end of the disk rotor 12 on both end faces facing in the circumferential direction of the disk rotor 12 .
40 are provided to protrude approximately in the circumferential direction of the disc rotor 12, respectively. These protrusions 40, 40
A pair of tapered surfaces 42, which are inclined toward each other toward the protruding ends of the protrusions 40, 42, are provided on both radially opposite side surfaces of the disc rotor 12.
42 are formed respectively.

On the other hand, on both side walls of the pad accommodating notch 28, that is, on the opposing surfaces of the opposing parts 26, 26, the pad 3 is
2 are formed with notches 44, 44 (only one of which is shown in FIG. 4) having a pair of opposing tapered surfaces that are inclined toward each other as they are spaced apart from each other in the approximate circumferential direction of the disc rotor 12, The protruding parts 40 of the pad 32, the protruding ends of the 40, and the notches 44,
With a predetermined gap between the bottom of 44,
The protrusions 40, 40 are tapered fit into the pair of tapered surfaces 42, 42 within the notches 44, 44. In addition, pad housing notch 3
As shown in FIG. 1 and FIG.
is formed, and pads 34 are formed in the notches 46, 46.
The protruding portions 40, 40 of are similarly adapted to be fitted in a tapered manner. In addition, in FIGS. 1 and 2, what is indicated by 48 is the pad 32, 3.
The anti-rattle spring 48 is an anti-rattle spring that constantly biases the pads 32 and 34 toward the outer circumferential side of the disc rotor 12 to prevent the pads 32 and 34 from rattling in the radial direction of the disc rotor 12. It is formed integrally with a rust prevention plate (not shown) that is attached in close contact with the side walls of the notches 28 and 30.

In the disc brake configured as described above, when hydraulic pressure is supplied to the liquid chamber 50, the piston 22 is protruded from the cylinder bore 16, one pad 32 is pressed against one surface of the disc rotor 12, and the reaction force is Then, the caliper 10 is moved in the opposite direction to the direction in which the piston 22 protrudes, and the other pad 34 is pressed against the other surface of the disc rotor 12 by the claw portion 20. As a result, the disc rotor 12 is compressed by both pads 32 and 34, and braking is performed. During this braking, if the disc rotor 12 is rotating in the direction A in FIGS. 1 and 4, for example,
The protrusions 40, 40 located on the left side of the pads 32, 34 in FIGS. 1 and 4 and the pad accommodation notch 2
Based on the taper fitting with the notches 44 and 46 located on the left side in FIG. 1 and FIG.
As shown in FIG. 4, a rotational force F is applied to the protrusions 40, 40 in the direction of approaching the disc rotor 12 using the contact portions of the protrusions 40, 40 with the tapered surfaces of the notches 44, 46 as fulcrums, respectively. It will be. In this case, the friction material 38 of the protrusion 40
By compressing the tapered surfaces 42, 42 in the direction toward each other, the density of the friction material 38 is increased and the amount of elastic deformation thereof is suitably suppressed. Material 3
8, the braking torque can be effectively received by the torque plate 14.

As described above, according to this embodiment, the pad 3 can be removed even through the friction material 38 of the protrusion 40 located closer to the disk rotor 12 than the back plate 36.
The braking torque generated on 2 and 34 is transferred to torque plate 1.
4, the brake torque can be received by the pads 32 and 34 during braking, compared to the conventional case in which the torque plate receives the braking torque only through the back plate located relatively far from the disc rotor. The rotational force F caused by the rotational force F is suitably reduced. As a result, pad 3
Vibration in a direction substantially parallel to the axis of the disc rotor 12 at 2 and 34 is suppressed, and brake squeal is effectively suppressed, and uneven wear of the friction material 38 in the circumferential direction of the disc rotor 12 is effectively suppressed. It is.

Furthermore, according to this embodiment, during braking,
Since the protrusions 40 of the pads 32 and 34 are tapered fitted into the notches 44 and 46 of the pad accommodation notches 28 and 30, vibrations of the pads 32 and 34 in the approximate radial direction of the disk rotor 12 are also compared. As a result, brake squeal can be suppressed more effectively.

Further, according to this embodiment, the protruding portion 40 is
6 and the friction material 38,
There is an advantage that the above effects can be obtained without increasing the number of manufacturing steps for the pads 32, 34.

In the above-mentioned embodiment, the protrusions 40 are provided on both end surfaces of the pads 32 and 34, but the protrusions 40 are provided on either side end surface, for example, when braking torque is transmitted to the torque plate 14 when the vehicle moves forward. The protruding portion 40 may be provided only on one side end surface.

Further, in the above-described embodiment, the protrusions 40 are provided at the inner peripheral side ends of the disk rotor 12 on both end surfaces of the pads 32 and 34, but they may be provided at other portions of the both end surfaces.

Further, in the above embodiment, a predetermined gap is provided between the protruding end of the protrusion 40 and the bottoms of the notches 44 and 46, but the present invention can be applied even if such a gap is not provided. It is possible to obtain certain effects.

In addition, in the above-mentioned embodiment, the present invention is applied to a disc brake equipped with a torque plate 14 having a fixing part 24 and an opposing part 26, which is disposed astride the disc rotor 12, and which accommodates both pads 32, 34. Although the present invention has been described for the case where it is applied, it goes without saying that the present invention can also be applied to a disc brake that is provided only on the cylinder portion 18 side of the disc rotor 12 and is provided with a torque plate that accommodates only one pad. It is.

In addition, various changes may be made to the present invention without departing from the spirit thereof.

[Brief explanation of drawings]

FIG. 1 is a diagram showing the main parts of a disc brake to which the present invention is applied. FIG. 2 is a cross-sectional view taken in FIG. 1. 3 is a perspective view of the pad of FIG. 1; FIG. Figure 4 is - in Figure 1.
FIG. 3 is an enlarged view of a main part of a cross-sectional view. 12... Disc rotor, 14... Torque plate, 28, 30... Pad housing notch, 32, 3
4... Padded, 36... Back metal, 38... Friction material,
40...Protrusion, 42...Tapered surface, 44, 46
...notch.

Claims (1)

[Claims for Utility Model Registration] A pair of pads that have a back metal and a friction material fixed thereto and are disposed on both sides of a disc rotor and brake the disc rotor by compressing the disc rotor; A disc brake equipped with a torque plate having a pad accommodating notch that accommodates a pad so as to be movable in a direction parallel to the axis of the disc rotor. A pair of tapered surfaces that protrude in the circumferential direction and are inclined toward each other toward the protruding end on both side surfaces facing in the radial direction of the disk rotor, and a protruding portion made of the backing metal and the friction material is provided. ,
A notch is provided in a side wall of the pad accommodation notch facing the circumferential direction of the disc rotor, into which the protruding portion is tapered fitted on the pair of tapered surfaces;
A disc brake characterized in that the torque plate receives braking torque generated on the pad via a back metal and a friction material constituting the protrusion.