JPH0774653B2 - Disk break - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a disc brake that is preferably used for applying a braking force to a vehicle or the like, and in particular, a brake squeal phenomenon by changing the natural frequency of a caliper. Disc brakes that can prevent

[Prior art]

3 and 4 show a prior art disc brake.

In the figure, reference numeral 1 denotes a mounting bracket which is provided on a non-rotating portion of a vehicle on one side of a disc 2, and the mounting bracket 1 has a pair of arm portions 1A which are spaced apart in the circumferential direction of the disc 2 and extend in the axial direction. , 1A and a connecting portion 1B that extends in a substantially bow shape on the outside of each outer claw portion 3E of the caliper 3 to be described later are provided so as to connect the distal ends of the respective arm portions 1A to each other.
The tip side of each arm 1A is arranged on the other side of the disc 2. Each arm 1A of the mounting bracket 1 supports the caliper 3 so as to be slidable in the axial direction of the disc 2, and positions the pad springs 8 described later so as to face each other.

Reference numeral 3 denotes a caliper slidably supported by the mounting bracket 1. The caliper 3 is arranged on one side of the disc 2 and has a pair of mounting portions 3A, 3A on both left and right sides in FIG. The protruding cylinder portion 3B and the disk 2 from the cylinder portion 3B
Of the bridge portion 3D, which is extended to the other side so as to straddle the upper part of the bridge portion and has a substantially oval window portion 3C formed in the center thereof, and extends downward from the tip side of the bridge portion 3D in a bifurcated shape. The outer claws 3E, 3E are provided and arranged on the other side of the disc 2, and these are substantially symmetrically formed. A sliding shaft (not shown) extending in the axial direction is attached to each mounting portion 3A of the caliper 3 via bolts 4, 4, and each sliding shaft slides the caliper 3 in the axial direction. In order to move, it is slidably fitted in each arm portion 1A of the mounting bracket 1.

Reference numeral 5 denotes a piston slidably inserted in the cylinder portion 3B of the caliper 3 (however, only the tip side is shown in FIG. 3), and the piston 5 is provided on the bottom side of the cylinder portion 3B. When brake fluid pressure is supplied to the inside of the cylinder portion 3B through the supply / discharge port 6, the inside of the cylinder portion 3B slides and each outer claw portion
Friction pads 7 to be described later are pressed against both sides of the disk 2 with 3E to apply a braking force to the disk 2.

Reference numerals 7 and 7 denote a pair of friction pads arranged on both sides of the disk 2, and 8 and 8 denote pad springs that slidably support the friction pads on both left and right sides. The brackets 1 are attached to the respective arm portions 1A so as to face each other on the left and right sides in the figure, and each friction pad 7 is compensated for sliding in the axial direction of the disc 2, and each friction pad 7 is attached to the disc 2 It is adapted to receive the rotational torque received from each arm 1A together with each arm.

The conventional disc brake is constructed as described above, and the cylinder portion of the caliper 3 is operated by the brake operation.
When the brake fluid pressure is supplied to the inside of 3B through the supply / discharge port 6,
The piston 5 slides toward the disc 2 side in the cylinder portion 3B to press the inner friction pad 7 against one surface of the disc 2 and the caliper 3 as a whole in the axial direction of the disc 2 with respect to the mounting bracket 1. It slides, and the outer friction pad 7 is also pressed against the other surface of the disk 2 by the outer claws 3E. As a result, the disc 2 is strongly sandwiched by the friction pads 7 and a braking force is applied.

[Problems to be solved by the invention]

By the way, in the above-mentioned conventional technique, the caliper 3 is formed in a symmetrical shape, and for example, with respect to the disk 2 rotating in the direction of arrow A when the vehicle moves forward, the inlet side 3D ₁ and the outlet side of the bridge portion 3D are The rigidity with 3D ₂ is substantially equal. Also, regarding each outer claw 3E, the outer claw 3E on the inlet side (left side in the figure) and the outer claw 3E on the outlet side (right side)
And the rigidity is the same.

Therefore, in the prior art, when the outer side friction pad 7 is pressed against the disc 2 by each outer claw portion 3E in order to apply the braking force to the disc 2, the friction pad 7 vibrates due to the undulation of the surface of the disc 2 or the like. Then, the outer claws 3E, 3E on the inlet side and the outlet side may coincide with each other and resonate with each other, and this resonance may occur.
There is a problem that it spreads to ₁ and 3D ₂ on the exit side and causes a so-called brake squeal phenomenon.

The present invention has been made in view of the above-mentioned problems of the prior art, and the present invention provides a disc brake capable of suppressing resonance of a bridge portion of a caliper during braking and preventing a brake squeal phenomenon. It is a thing.

[Means for solving problems]

In order to solve the above-mentioned problems, the feature of the means adopted by the first invention is that the bridge portion of the caliper is provided with a padding on either the inlet side or the outlet side in the disc rotation direction, The rigidity of the bridge portion is different between the inlet side and the outlet side depending on the height.

Further, the feature of the means adopted by the second invention is that the bridge portion of the caliper is provided with a padding on either the inlet side or the outlet side in the disc rotation direction and a window portion on the other side, and the padding is provided. The rigidity of the bridge portion is different between the inlet side and the outlet side depending on the window portion and the window portion.

[Action]

According to the first aspect of the present invention, the padding is provided on one of the inlet side and the outlet side in the disc rotation direction located at the bridge portion of the caliper, and by this padding, the bridge portion is provided on the inlet side and the outlet side. Since the rigidity of the caliper is different, the left and right rigidity balance of the entire caliper changes and the natural frequency changes, so even if the friction pad vibrates due to the waviness of the disk surface, etc., the resonance of each outer claw etc. is suppressed. be able to.

According to the second aspect of the invention, the pad is provided on either one of the inlet side and the outlet side in the disc rotation direction at the bridge portion of the caliper, and the window portion is provided on the other side. Because the rigidity of the bridge part is greatly different between the inlet side and the outlet side due to the window part, the left and right rigidity balance of the entire caliper changes and the natural frequency changes,
Even if the friction pad vibrates due to undulations on the disk surface, it is possible to reliably suppress resonance of the outer claws and the like.

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS. 1 and 2. In the embodiments, the same components as those of the prior art shown in FIGS. 3 and 4 described above are designated by the same reference numerals, and the description thereof will be omitted.

In the figure, reference numeral 11 denotes a caliper slidably supported by the mounting bracket 1, and the caliper 11 is substantially the same as the caliper 3 described in the prior art, and the cylinder portion 11B having each mounting portion 11A.
And a bridge portion 11D having a window portion 11C and each outer claw portion 11
The window portion 11C of the caliper 11 although it is composed of E and
Is formed so as to be biased toward the exit side 11D ₂ of the bridge portion 11D with respect to the rotation direction of the disc 2 (direction of arrow A). Further, the bridge portion 11D at the inlet side 11D ₁ and padding 12, 12 in the outer claw portion 11E at a portion indicated by oblique lines in the figure in the right side in the drawing (the inlet side), ... is performed, the inlet side 11D ₁ and right outer claw portion 11E is formed thicker as compared to the outlet side 11D ₂ and the left side of the outer claw portion 11E.

As a result, in the caliper 11, the rigidity of the bridge portion 11D and each outer claw portion 11E is greatly different between the left and right in the figure, and the natural frequency of the caliper 11 is changed by changing the overall rigidity balance. It is designed to damp the vibration of. Then, each outer claw portion 11E of the caliper 11 has left and right outer claw portions even if the friction pad 7 vibrates when the outer side friction pad 7 is pressed against the disc 2.
It is possible to prevent 11E and 11E from vibrating and resonating in unison.

The disc brake according to the present embodiment has the above-mentioned structure, and the basic operation thereof is not different from that of the prior art.

However, in this embodiment, it provided biasing the window portion 11C of the caliper 11 on the outlet side 11D ₂ of the bridge portions 11D, the bridge portion 11D
11D ₁ etc. of the bridge side 11D ₁ and the bridge portion 11D
Since the rigidity of each outer claw portion 11E is made different between left and right, the outer side friction pad 7 is pressed against the disc 2 by each outer claw portion 11E in order to apply a braking force to the disc 2. Even if the pad 7 vibrates due to undulations on the surface of the disc 2, the left and right outer claw portions 11E, 11
It is possible to surely suppress the resonance of E, which follows and follows E, and to prevent the brake squeal phenomenon from occurring.

Further, the entrance side 11D ₁ such bridge portions 11D performs padding 12, from the outlet side 11D ₂ are provided biasing the window portion 11C, the caliper 11 is the right-to-left asymmetric shape, the left wheels of the vehicle It is possible to easily identify whether it is for the right wheel or for the right wheel, and it is possible to simplify parts management and assembly work.

In addition, in the above-mentioned embodiment, the buildup 12 is applied to the inlet side 11D _{1 and the} like of the bridge section 11D, and the window section 11C is provided on the exit side 11D ₂ , but the present invention is not limited to this, and the buildup is provided. 12
May be provided on the outlet side 11D ₂ and the window 11C may be provided on the inlet side 11D ₁ , and even in this case, the rigidity of the bridge portion 11D can be made different between the inlet side 11D ₁ and the outlet side 11D _2. ,
Brake squeal can be prevented.

Further, the padding 12 such as the bridge portion 11D may be provided on either the inlet side 11D ₁ or the outlet side 11D _2, and the outer claw portion 11E
Does not necessarily have to be padded.

〔The invention's effect〕

As described in detail above, according to the first invention, the bridge portion of the caliper is provided with a padding on either the inlet side or the outlet side in the disc rotation direction, and according to the second invention,
The bridge portion of the caliper has a padding on either the inlet side or the outlet side in the disc rotation direction and the window portion on the other side, so that the rigidity of the bridge portion can be made different between the inlet side and the outlet side. Therefore, in order to apply the braking force to the disc, the outer side claw portion presses the outer side friction pad against the disc, and even if the friction pad vibrates, the outer side claw portion surely resonates with the bridge portion etc. It is possible to suppress it, and it is possible to effectively prevent the squeal of the brake.

[Brief description of drawings]

1 and 2 show an embodiment of the present invention, FIG. 1 is a plan view of a disc brake, FIG. 2 is a front view of FIG.
3 and 4 show the prior art, FIG. 3 is a plan view of the disc brake, and FIG. 4 is a front view of FIG. 1 ... Mounting bracket, 1A ... Arm, 2 ... Disc,
5 ...... piston, 7 ...... friction pad, 8 ...... pad spring, 11 ...... caliper, 11A ...... mounting portion, 11B ...... cylinder unit, 11C ...... window, 11D ...... bridge portion, 11D ₁ ...... Inlet side, 11D ₂ …… Outlet side, 11E …… Outer claws, 12 …… Overlaying.

Claims (2)

[Claims] 1. A mounting bracket and a cylinder portion and an outer claw portion which are located on both sides of the disc in front of and behind a bridge portion slidably supported by the mounting bracket and straddling above the disc. In a disc brake including a caliper and a piston that is slidably provided on a cylinder portion of the caliper and that presses a pair of friction pads between the outer claw portion and both surfaces of the disc, a bridge portion of the caliper is provided. Is a disc brake in which one of the inlet side and the outlet side in the disc rotation direction is provided with a padding, and the rigidity of the bridge portion is made different between the inlet side and the outlet side by the padding. 2. A mounting bracket and a cylinder portion and an outer claw portion which are slidably supported by the mounting bracket and which are located on both sides of the disc in front of and behind a bridge portion straddling the disc. In a disc brake including a caliper and a piston that is slidably provided on a cylinder portion of the caliper and that presses a pair of friction pads between the outer claw portion and both surfaces of the disc, a bridge portion of the caliper is provided. Is provided with a padding on one of the inlet side and the outlet side in the disc rotation direction and a window portion on the other side, and the rigidity of the bridge portion is made different between the inlet side and the outlet side by the padding and the window portion. A disc brake characterized by its construction.