JPS6234033Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a pad support device for a disc brake, and relates to a pad support device in which a pad retainer has a function of preventing rattling and a pad spring is eliminated.

In a disc brake, a friction pad that is pressed against the disc is guided by stepped torque receiving parts formed on a bracket on both the left and right sides of the disc brake and is slidably supported in the disc axial direction. This allows the friction pad to slide smoothly in the axial direction of the disk, and also prevents damage to the stepped torque receiving part due to prying or rattling of the friction pad. Furthermore, a pad spring is installed above the friction pad so as to engage with the inner wall of the caliper and press the friction pad toward the center of the disk, thereby preventing the friction pad from rattling. By the way, since the pad retainer and the pad spring are each separate items, there are problems such as increased manufacturing cost, increased number of parts, and laborious assembly work.

Therefore, the purpose of the present invention is to provide a pad retainer with a function of preventing rattling of the friction pads,
To ensure that a friction pad is set in a reliable and stable state without using a pad spring,
The sliding of the friction pads is made smoother, and damage caused by rattling of the friction pads and the occurrence of rattling noises are reduced.The number of parts is reduced, manufacturing costs are reduced, and assembly work is facilitated.Moreover, the pad retainer can be attached to the bracket. To provide a friction pad support device for a disc brake which is mounted in resilient engagement and allows the friction pad to float during braking and can be used for a long period of time without being damaged.

In accordance with the above object, the present invention provides the disc brake, wherein a protrusion is formed on the outer surface of the stepped torque receiving part of the bracket in the disc axial direction,
A pair of guide rail parts, a pad pressing part that connects the guide rail parts at the upper part and is bent toward the guide rail side, and a holding part that extends outward from the guide rail part, curves downward, and has a spring force. A pad retainer is attached to the bracket by covering the stepped torque receiving part of the bracket with its guide rail part and elastically engaging its holding part with the protrusion part, and is installed between the guide rail part and the pad pressing part. It is characterized in that the ears of the friction pad are inserted into the friction pad.

Hereinafter, an embodiment in which the present invention is applied to a floating type disc brake will be described with reference to the drawings.

The bracket 1 is arranged such that a pair of supporting arms 2 straddle a disk 3, which rotates together with the wheel, at a predetermined distance on its outer periphery, and is fixed to the vehicle body on one side of the disk 3. The caliper 4 straddles the disk 3 at a bridge portion 5, and has a cylinder portion (not shown) for housing a piston on one side and a reaction force portion (not shown) on the other side. A support pin 7 is fixed to the arm portion 6 of the caliper 4 that protrudes from both sides, and this is slidably inserted into the support arm 2, and the bracket 1 is moved by the hydraulic operation of the piston.
It is movable in the axial direction of the disk.

In the supporting arm 2, stepped torque receiving portions 8 are formed in the disk axial direction on opposing surfaces of both side walls sandwiching the disk 3, and furthermore, stepped torque receiving portions 8 are formed in the supporting arm 2.
Projections 10 are formed along the stepped torque receiving portions 8 on both outer side walls 9 in the axial direction of the disk. Friction pads 11 are arranged on both sides of the disk 3, and each of the friction pads 11 is connected to a back plate 11a.
, and the upper part thereof has ears 11b that protrude on both sides.
is supported by the stepped torque receiving portion 8 via a pad retainer 12 so as to be slidable in the disk axial direction.

This pad retainer 12 is as shown in FIG.
A pair of guide rail parts 12a, 12a, a pad pressing part 12b which connects the guide rail parts 12a, 12a at the upper part and is bent at a substantially right angle toward the guide rail parts 12a, 12a, the guide rail part 12a,
It consists of holding portions 12c, 12c which extend to both outside sides of 12a, curve downward and have a spring force. Inside the guide rail portions 12a, 12a, there are inner surfaces 8a, 8 of stepped torque receiving portions 8, 8.
The locking tongues 12d, 12d that engage with the outer surfaces 8b, 8b of the stepped torque receiving portions 8, 8 are located on the outside.
and when the friction pad 11 is attached, the ear part 1
Guide pieces 12e, 12e for guiding 1b are formed, respectively. Furthermore, the pad pressing part 12b
There are also guide pieces 12 on both sides of the ear portion 11b for guiding the ear portion 11b.
f, 12f are formed. In addition, the holding part 1
2c and 12c may have larger curved portions if there is space for assembly. In this case, the spring force will be greater and the setting of the pad retainer 12 will be more stable.

Then, this pad retainer 12 is applied from inside the bracket 1 to the stepped torque receiving part 8 of each support arm 2, and the protruding parts 10, 10 are attached to the holding part 12.
c, 12c, and push in until the guide rail parts 12a, 12a are in close contact with the stepped torque receiving part 8. Thereby, the pad retainer 12 has the holding parts 12c, 12c, and the locking tongue pieces 12d, 1.
2d and the guide pieces 12e, 12e, the torque receiving part 8 is attached in close contact with the stepped torque receiving part 8. Then, each of the friction pads 11 is inserted into the ear portion 11b from the outside.
is inserted so that it is held between the guide rail portion 12a and the pad pressing portion 12b. At this time, the ear part 11b is guided and inserted by the guide piece 12e of the guide rail part 12a and the guide piece 12f of the pad pressing part 12b, and the friction pad 11 is easily set in a predetermined position and assembly is simple. . The protruding portion 10 of the bracket 1 is formed wider than the holding portion 12c of the pad retainer 12, so that the pad retainer 12 can be held securely.

Next, the operation of this embodiment will be explained. When hydraulic pressure is supplied to the cylinder part of the caliper 4 and the working piston is moved forward in the disk axial direction, the friction pad 11 on the working piston side is pushed and slides on the guide rail part 12a in the disk axial direction, causing the disc 3 to move forward.
press against. Due to this reaction force, the caliper 4 is moved in the opposite direction to the operating piston by the support pin 7,
The reaction force presses the friction pad 11 on the opposite side against the disc 3, thereby braking the disc 3.

During this braking action, each friction pad 1
The lugs 11b of the pad retainer 12 slide in the disk axial direction on the guide rails 12a of the pad retainer 12, but the pad retainer 12 is securely locked to the stepped torque receiving parts 8, 8 by the locking tongues 12d, 12d, and its movement is restricted, so that the lugs 11b slide smoothly. When the friction pad 11 is in sliding contact with the disk 3 during braking, a force is generated that moves the pad in the disk circumferential direction, but this movement is restricted by the holding parts 12c, 12c and the pad pressing part 12b of the pad retainer 12. Also, if the friction pad 11 rises up at this time, the holding parts 12c, 12c of the pad retainer 12 stretch so as to allow the friction pad 11 to rise up. Therefore, the pad retainer 12 can be used well for a long time without deformation or damage.

Furthermore, even if the vehicle body vibrates when the vehicle is running without braking, the pad retainer 12 is attached to the bracket 1 by engaging with the stepped torque receiving parts 8, 8 by the holding parts 12c, 12c, and the pad retainer 12 is attached to the bracket 1, and its pad pressing part 12b Since the ear part 11b of the friction pad 11 is pressed by the friction pad 11, the friction pad 11 may rattle due to the vibration of the vehicle body, hitting and damaging the stepped torque receiving parts 8, 8, or causing rattling noise. is reduced.

In this invention, as mentioned above, the pad retainer has a function to prevent rattling of the friction pads, so the conventional pad spring is no longer required, reducing the number of parts, which reduces manufacturing costs and simplifies assembly. It will be planned. In addition, the parts retainer can be easily attached to the stepped torque receiving part of the bracket.
Furthermore, since the friction pads are easily assembled to the pad retainer and the pad retainer and friction pads are securely set, rattling during braking as well as during driving can be suppressed as much as possible. Further, even if the friction pads are lifted up during braking, the pad retainer can be used satisfactorily for a long period of time without the risk of deformation or damage because the holding portion of the pad retainer stretches.

[Brief explanation of the drawing]

The drawings show an embodiment in which the present invention is applied to a floating type disc brake, in which FIG. 1 is a sectional front view, FIG.
FIG. 3 is a perspective view of the pad retainer. 1 is the bracket, 2 is the support arm, 3 is the disk,
4 is a caliper, 8 is a stepped torque receiving part, 10 is a protruding part, 11 is a friction pad, 11b is an ear part, 12 is a pad retainer, 12a is a guide rail part, 12b is a pad pressing part, and 12c is a holding part. .

Claims (1)

[Scope of utility model registration request] In a disc brake in which a friction pad that is pressed against a disc is guided by stepped torque receiving parts formed on a bracket on both left and right sides of the disc brake and is slidably supported in the disc axial direction, the stepped torque receiving part A protruding part is formed on the outer surface in the axial direction of the disk, a pair of guide rail parts, a pad pressing part that connects the guide rail parts at the upper part and is bent toward the guide rail side, and a pad pressing part that extends outward from the guide rail part. A pad retainer consisting of a holding part that extends downwardly and has a spring force is attached to the bracket by covering the stepped torque receiving part of the bracket with its guide rail part and elastically engaging the holding part with the protruding part. 1. A pad support device for a disc brake, characterized in that the ear portion of the friction pad is inserted between the guide rail portion and the pad pressing portion.