JPH10331883A - Disc brake - Google Patents

Abstract

PROBLEM TO BE SOLVED: To restrain the occurrence of abutting sound between a friction pad and a supporting member. SOLUTION: In an anti-rattle spring 41, a friction pad is energized at all times toward the first opposition part of a supporting member faced to the side surface at the rotation projecting side of a disc rotor by a second part 41b, a third part 41a, a first curved part 41f and a second curved part. And only when the friction pad is moved toward the second opposition part of the supporting member faced to the side surface part at the rotation coming-in side of the disc rotor by a first part 41c, the second part 41b and the first curved part 41f, the friction pad is restrained from being moved toward a second opposition part.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disk brake provided with an urging member for preventing a friction pad from rattling in a circumferential direction of a disk rotor.

[0002]

2. Description of the Related Art Conventional disk brakes are disclosed in
What is disclosed in -53161 is known.
This conventional disk brake is a disk brake for a vehicle, and includes a disk rotor that rotates around its axis, and a disk rotor that is urged in an axial direction of the disk rotor to contact a rotating surface of the disk rotor. A friction pad for suppressing rotation of a rotor, a disk rotor rotation revolving side surface portion and a disk rotor rotation revolving side surface portion of the friction pad provided with the rotation of the disk rotor when the vehicle advances, and the friction pad A supporting member for supporting the disk rotor rotation inflow side surface portion and the outflow side surface portion so that the friction pad can slide in the axial direction of the disk rotor; And a biasing means for constantly biasing the support member toward the first facing portion facing the portion.

In this conventional disc brake, since the friction pad is always urged toward the first facing portion by the urging means, it is possible to prevent the friction pad from rattling in the support member. And

[0004]

However, in such a conventional disk brake, for example, at the time of backward braking of the vehicle, the rotation of the disk rotor causes the friction pad to oppose the urging force of the urging means. By moving the friction pad toward the portion, the side surface portion of the friction pad on the rotating side of the rotor of the rotor comes into contact with the second facing portion, and there is a possibility that a contact sound may be generated.

On the other hand, when the urging force of the urging means is increased in order to suppress the movement of the friction pad to the second opposed portion due to the rotation of the disk rotor during the reverse braking, the sliding resistance of the friction pad to the support member is reduced. Resulting in increased
As a result, there is a possibility that the brake will be dragged.

An object of the present invention is to provide a disc brake that suppresses the generation of a contact noise between a friction pad and a support member, for example, during reverse braking of a vehicle.

[0007]

In order to solve the above-mentioned technical problems, a disk brake for a vehicle, comprising: a disk rotor which rotates about its axis; and a disk brake which is urged in an axial direction of the disk rotor. A friction pad that suppresses rotation of the disk rotor by contacting the rotation surface of the disk rotor; a disk rotor rotation reciprocating side surface portion and a disk provided with the rotation of the disk rotor when the vehicle moves forward provided in the friction pad; A support member that supports the disk rotor rotation inflow side surface portion and the outflow side surface portion so that the friction pad can slide in the axial direction of the disk rotor; A first biasing device that constantly biases a friction pad toward a first facing portion of the support member facing the side surface portion of the disk rotor rotating / forwarding side;
The urging means and the friction pad move toward the second opposing portion of the friction pad only when the friction pad moves toward the second opposing portion of the support member that opposes the disk rotor rotation inflow side surface. The disc brake includes the second urging means for suppressing the movement.

Preferably, one end of the first member is located in a space between the disk rotor rotation side surface and the second facing portion, and the first member extends from the one end toward the second facing portion. And one end thereof is connected to the other end of the first member,
A first bending portion that opens toward the disk rotor rotation inflow side surface portion and abuts on the second facing portion, and one end of which is connected to the other end of the first bending portion; A second member extending from one end connected to the other end to a side opposite to the side where the disk rotor is located, and one end of which is connected to the other end of the second member; A second bending portion that opens toward the second bending portion, one end of which is connected to the other end of the second bending portion, and one end connected to the other end of the second bending portion extends toward the friction pad, and the other end is A third member engaged with the friction pad, wherein the first biasing unit includes the second member, the third member, the first curved portion, and the second curved portion; (2) The urging means includes the first member, the first curved portion, and the second member. Disc brakes are preferred.

[0009] More preferably, a wear indicator portion extending from one end of the first member toward the rotating surface and coming into contact with the rotating surface when the friction pad is worn by a predetermined amount to generate a scratching sound is provided. Disc brakes are preferred.

In the disk brake of the first aspect, when the friction pad is moved toward the second facing portion, the movement of the friction pad is suppressed by the first urging means and the second urging means. The disc brake of the second aspect has the same effect as the first aspect, except that the first member, the second member, the third member, the first bending portion,
The first urging means and the second urging means are constituted by the second bending portion.

[0011] The disk brake of the third aspect is the second aspect of the invention.
In addition to the operation of the first member, the second member, the third member, the first member
The bending portion, the second bending portion, and the wear indicator portion constitute the first urging means, the second urging means, and the wear indicator means for detecting wear of the friction pad.

[0012]

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

(Embodiment 1) FIG. 1 shows a caliper-fixed type disc brake embodying the present invention. In this disc brake, an inner caliper 11 is used.
And the outer caliper 12 are integrally connected by bolts, and the inner piston 21 and the outer piston 22 and the inner pad 31 and the outer pad 32, which are friction pads, are opposed to each other in the inner caliper 11 and the outer caliper 12, respectively. I have.

The inner caliper 11 is a torque reaction member of the inner pad 31, and has a cylinder 11a and an arm 11b for attaching to the vehicle body. On the other hand, the outer caliper 12 is a torque reaction member of the outer pad 32 and has a cylinder 12a. The inner caliper 11 is provided with a port 11d for supplying and discharging brake fluid to and from the cylinder 11a, and a communication port (not shown) provided with the cylinder 11a and the cylinder 12a of the outer caliper 12 provided on the outer caliper 12. A communication port (not shown) is provided for communication.

As is well known, the inner piston 21 and the outer piston 22 are respectively slidably mounted in the cylinders 11a and 12a of the inner caliper 11 and the outer caliper 12 so as to be slidable in the axial direction.
The inner pad 31 and the outer pad 32 are pushed by the brake fluid supplied to the a and 12a, and are pushed toward a disk rotor (not shown) disposed between the two pads. The inner pad 31 and the outer pad 32 are mounted on the inner caliper 11 and the outer caliper 12 so as to be movable in the cylinder axial direction. That is, the inner caliper 11 and the outer caliper 12 are connected to the inner pad 31 and the outer pad 3.
2 as a supporting member. Each pad 31, 32
Are backing metal 31a, 32a and lining 31b, 32b
It is composed of

FIG. 2 is a front view of the inner pad 31 of FIG. 1 as viewed from the piston 21 side, and FIG. 3 is a top view of the inner pad 31 of FIG. The arrow in FIG. 2 indicates the rotation direction of the disk rotor when the vehicle moves forward. As shown in FIGS. 2 and 3, the inner pad 31
An arbitrary point of the inner pad 31, for example, a disk rotor rotation entry side surface portion 31d located on a side (disk rotor rotation entry side) through which a disk rotor that rotates when the vehicle advances when viewed from the center of gravity passes first; A disk rotor rotation outlet side surface portion 31c located on the opposite side (disk rotor rotation outlet side) of the disk rotor rotation inlet side, and an anti-rattle on the disk rotor rotation inlet side surface portion 31d side. A spring 41 is provided.

FIG. 4 is a top view of the inner caliper 11 and the inner pad 31 of FIG. The inner caliper 11 includes a first opposing portion 11c that faces the disk rotor rotation outlet side surface portion 31c of the inner pad 31, and a disk rotor rotation inlet side surface portion 31d of the inner pad 31.
, And at least the side surfaces 31c, 31d of the inner pad 31 on the disk rotor rotation outflow side and the rotation inflow side, and the first and second opposed portions 11c,
11d, the inner pad 31 is supported so as to be slidable in the axial direction of the disk rotor 51 (vertical direction in FIG. 4).

As can be seen from FIG. 4, the anti-rattle spring 41 is interposed between the side face 31d of the inner pad 31 on the rotating side of the disk rotor and the second facing part 11d of the inner caliper 11. become.

FIG. 5 shows the anti-rattle spring 4 of FIG.
1 is an enlarged view of FIG. The anti-rattle spring 41 includes a first member 41c, a second member 41b, a third member 41c, and a first member 41c.
It is composed of a curved portion 41f, a second curved portion 41e, and a wear indicator member 41d.

As shown in FIGS. 4 and 5, the first member 41c
Is one end of which is a side surface portion 31d of the disk rotor rotation revolving side.
It is located in the space between the second opposing portion 11d and extends from one end thereof toward the second opposing portion 11d.

One end of the first curved portion 41f is connected to the other end of the first member 41c, and is opened toward the disk rotor rotation inlet side surface portion 31d.
d.

One end of the second member 41b is connected to the other end of the first curved portion 41f, and extends from one end connected to the other end of the first curved portion 41f toward the side opposite to the side where the disk rotor 51 is located. Are located.

One end of the second curved portion 41e is connected to the other end of the second member 41b, and is opened toward the side where the disk rotor 51 is located.

The third member 41a has one end connected to the other end of the second curved portion 41e, extending from one end connected to the other end of the second curved portion 41e toward the friction pad 31, and the other end having friction. It is engaged with the pad 31.

The wear indicator portion 41d extends from one end of the first member 41c toward the rotation surface of the disk rotor 51.

The anti-rattle spring 41 is fixed to the inner pad 31 by engaging an engaging portion 41aa provided at the other end of the third member 41a with the side surface of the inner pad 31 on the piston 21 side. I have.

The anti-rattle spring 41 is integrally bent from a plate-like member.

The second member 41b, the third member 41a, the first curved portion 41f, and the second curved portion 41e form a spring means (first biasing means), and the first member 41f, the second The member 41b and the first bending portion 41f are connected to a spring means (second
(Urging means). As shown in FIGS. 4 and 5, in the normal state, the anti-rattle spring 41
Is in contact with the second facing portion 11d at the first curved portion 41f, and the second member 41 of the anti-rattle spring 41
b, the third member 41a, the first curved portion 41f, and the second curved portion 41e act as a spring to allow the inner pad 31
Is always urged toward the first opposing portion 11c of the inner caliper 11, and the disk rotor rotation outlet side surface portion 31c
Are in contact with the first opposing portion 11c. Therefore, rattling of the inner pad 31 with respect to the inner caliper 11, particularly in the direction from the disk rotor rotation inflow side to the outflow side, or in the direction from the disk rotor rotation inflow side to the inflow side (left-right direction in FIG. 4). Can be suppressed.

When the vehicle is moving forward, the inner piston 2
1 is pushed toward the disk rotor 51 by the supply of the brake fluid, the inner pad 31 is urged by the inner piston 21 to move the inside of the inner caliper 11 toward the disk rotor 51, and
Will come into contact with the rotating surface. Therefore, the rotation of the disk rotor 51 is suppressed, and the brake operation is performed. The inner caliper 1 of the inner pad 31
When the anti-rattle spring 41 moves in the inner portion 1, a contact portion of the inner caliper 11 with the second opposing portion 11 d becomes a first curved portion 41 f of a substantially U-shaped spring portion.
Therefore, the second opposing portion 11 of the anti-rattle spring 41
Since the contact with d is substantially in a line contact state, when the inner pad 31 moves in the inner caliper 11, the anti-rattle spring 41 and the second opposed portion 11
The sliding resistance with d becomes small. Consequently, the movement of the inner pad 31 in the inner caliper 11 can be made smooth. When the lining 31b of the inner pad 31 gradually wears, the wear indicator 4
When 1d approaches the rotating surface of the disk rotor 51 and its wear reaches the limit value, the indicator 41d comes into contact with the rotating surface of the disk rotor 51 and generates a scratching sound. Therefore, the driver can know that the wear state of the lining 31b of the friction pad 31 has reached the limit value.

FIG. 6 is a view showing the state of the inner pad 31 of the inner caliper 11 during the reverse braking of the vehicle, and FIG. 7 is a view showing the anti-rattle spring 4 of FIG.
1 is an enlarged view of FIG. As shown in FIGS. 6 and 7, at the time of reverse braking, the inner pad 31
Due to the rotation of 1, the second caliper 11d of the inner caliper 11 is applied to the second opposing portion 11d of the inner caliper 11, It will be moved to be dragged toward.

However, the inner pad 31 is
By moving toward the facing portion 11d, the side surface portion 31d of the inner pad 31 on the rotating side of the disk rotor rotates, and the first member 41c of the anti-rattle spring 41, in particular, the first
The end portion of the member 41c is brought into contact with the end portion of the side surface portion 31d on the rotating side of the disk rotor.
The movement of the inner pad 31 toward the second facing portion 11d is suppressed. That is, the noise generated when the inner pad 31 comes into contact with the disk rotor rotation side surface 31d of the inner pad 31 and the second opposed portion 11d of the inner caliper 11 is reduced.

Further, at the time of forward braking of the vehicle, the inner pad 31 includes the second member 41b, the third member 41a, the first curved portion 41f, and the second member 41b of the anti-rattle spring 41.
The first opposing portion 1 is formed only by the spring portion including the curved portion 41e.
1a, no excessive urging force is applied to the inner pad 31a.
There is no possibility that the sliding resistance of the inner caliper 11 will increase, and that the brake will be dragged.

Although the inner pad 31 has been described, the outer pad 32 is provided with the anti-rattle spring 41 in the same manner as the inner pad 31, so that the same operation and effect can be obtained.

As described above, according to the disc brake of this embodiment, the second member 41b, the third member 41a, the first curved portion 41e of the anti-rattle spring 41,
Also, there is no possibility that the inner pad 31 rattles due to the spring action of the second bending portion 41f.

Further, the lining 31b is formed by the wear indicator member 41d of the anti-rattle spring 41.
It is possible to check the abrasion state of the.

Further, the first of the anti-rattle spring 41
Due to the spring action of the member 41c, the first curved portion 41f, and the second member 41b, it is possible to reduce the sound generated by the contact between the inner pad 31 and the inner caliper 11 during the backward braking of the vehicle.

Further, the anti-rattle spring 41 integrally includes a spring portion for suppressing rattling of the inner pad 31, a spring portion for reducing a contact sound between the inner pad 31 and the inner caliper 11, and an indicator portion. Because it is equipped, while suppressing the increase in the number of parts,
This enables effective use of space in disc brakes.

Accordingly, it is possible to provide a disc brake that suppresses the generation of a contact sound between the inner pad 31 and the inner caliper 11 during, for example, reverse braking of the vehicle.

(Embodiment 2) FIG. 8 is a top view of an inner caliper and an inner pad in a disk rotor of this embodiment, and FIG. 9 is an enlarged view of an anti-rattle spring 41 of FIG. Anti-rattle spring 41
Except for this configuration, the configuration is the same as that of the first embodiment, and the description is omitted. The same members as those in the first embodiment are denoted by the same reference numerals.

As shown in FIGS. 8 and 9, the anti-rattle spring 41 includes a first member 41c, a second member 41b, a third member 41c, a first curved portion 41f, a second curved portion 41e,
And a wear indicator member 41d.

One end of the first member 41c is located in the space between the side face portion 31d on the rotating side of the disk rotor and the second opposing portion 11d, and extends from one end thereof toward the second opposing portion 11d. ing.

One end of the first curved portion 41f is connected to the other end of the first member 41c, and is opened toward the side surface portion 31d on the rotating side of the disk rotor.
d.

One end of the second member 41b is connected to the other end of the first curved portion 41f, and extends from one end connected to the other end of the first curved portion 41f toward the side opposite to the side where the disk rotor 51 is located. Are located.

One end of the second curved portion 41e is connected to the other end of the second member 41b, and is opened toward the side where the disk rotor 51 is located.

One end of the third member 41a is connected to the other end of the second curved portion 41e. The third member 41a extends from one end connected to the other end of the second curved portion 41e toward the friction pad 31, and the other end has friction. It is engaged with the pad 31.

The wear indicator portion 41d extends from one end of the first member 41c toward the rotation surface of the disk rotor 51.

The anti-rattle spring 41 is fixed to the inner pad 31 by fitting the attachment portion 41ab provided on the third member 41a to the disk rotor rotation inflow side surface portion 31d.

The anti-rattle spring 41 is integrally bent from a flat plate-like member.

The other functions and effects are the same as those of the first embodiment, and the description is omitted.

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

[0051]

According to the first aspect of the present invention, it is possible to reduce the sound generated by the contact between the friction pad and the support member.

Therefore, it is possible to provide a disk brake which suppresses the generation of the contact noise between the friction pad and the support member, for example, during the reverse braking of the vehicle.

According to the invention of claim 2, in addition to the effect of the invention of claim 1, an increase in the number of parts is suppressed, and the space in the disk brake can be effectively used.

According to the third aspect of the invention, in addition to the effect of the second aspect, the space in the disc brake can be effectively used.

[Brief description of the drawings]

FIG. 1 is a sectional view of a disc brake according to a first embodiment.

FIG. 2 is a front view of the inner pad 31 of FIG.

FIG. 3 is a top view of the inner pad 31 of FIG. 2;

FIG. 4 is a top view near the inner pad 31 of FIG. 1;

FIG. 5 is an enlarged view of the anti-rattle spring 41 of FIG. 4;

FIG. 6 is a top view of the vicinity of the inner pad 31 at the time of reverse braking of the vehicle in FIG. 4;

FIG. 7 is an enlarged view of the anti-rattle spring 41 of FIG. 6;

FIG. 8 is a top view near the inner pad 31 of the disc brake according to the second embodiment.

FIG. 9 is an enlarged view of the anti-rattle spring 41 of FIG. 8;

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 11 Inner caliper 11c 1st opposing part 11d 2nd opposing part 12 Outer caliper 31 Inner pad 31c Disk rotor rotation outlet side outer peripheral part 31d Disk rotor rotation inlet side outer peripheral part 32 Outer pad 41 Anti-rattle spring 41a Third member 41b No. 2 member 41c First member 41d Indicator member 41e Second curved portion 41f First curved portion 51 Disk rotor

Claims (3)

[Claims] 1. A disk brake for a vehicle, comprising: a disk rotor that rotates about an axis thereof; and a disk brake that is urged in an axial direction of the disk rotor to contact a rotating surface of the disk rotor. A friction pad that suppresses rotation, a disk rotor rotation reciprocating side surface portion and a disk rotor rotation revolving side surface portion associated with the rotation of the disk rotor when the vehicle includes the friction pad, and the friction pad includes the friction pad. A support member for supporting the disk rotor rotation inflow side surface portion and the outflow side surface portion so as to be slidable in the axial direction of the disk rotor; and A first urging unit that constantly urges the opposing support member toward a first opposing portion; and wherein the friction pad is on the disk rotor rotation inflow side. A disc brake comprising: a second biasing unit that suppresses movement of the friction pad toward the second facing portion only when the support member moves toward the second facing portion of the support member facing the surface portion. 2. A first member whose one end is located in a space between the disk rotor rotation side surface portion and the second facing portion, and which extends from the one end toward the second facing portion. One end thereof is connected to the other end of the first member, and is open toward the side surface of the disk rotor rotating / returning side;
A first bending portion abutting on the second facing portion, one end of which is connected to the other end of the first bending portion;
A second member extending from one end connected to the other end of the curved portion toward a side opposite to the side where the disk rotor is located; one end thereof is connected to the other end of the second member, and the disk rotor is located; A second bending portion that opens toward the side, one end of which is connected to the other end of the second bending portion;
A third end extending from one end connected to the other end of the curved portion toward the friction pad and the other end engaged with the friction pad;
A first member, wherein the first urging means comprises the second member, the third member, the first curved portion, and the second curved portion, and wherein the second urging member comprises the first member. The disc brake according to claim 1, comprising: the first bending portion; and the second member. 3. A wear indicator portion extending from one end of the first member toward the rotating surface and abutting against the rotating surface to generate a scratching sound when the friction pad has worn by a predetermined amount. 2 disc brakes.