JPS628654B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to improvements in disc brakes, and particularly to improvements in a structure for preventing rattling of friction pads in disc brakes in which friction pads and calipers are each independently supported on a vehicle body fixing part.

A support (hereinafter referred to as "support") as a vehicle body fixing part that supports a caliper disposed so as to straddle the edge of the disc so that it can move in the axial direction of the disc.
A pair of friction pads facing each other with a disc sandwiched therebetween, such as an integral knuckle type disc brake that is integrated with a knuckle etc. forming a wheel support part, and the caliper that presses these friction pads against the disc. In a type of disc brake in which the fixed parts of the vehicle body support each independently,
In consideration of friction pad replacement work, etc., it is desirable that the assembly and removal operations be performed separately. But these calipers,
Since the friction pads form a certain assembly relationship when assembled, it is desirable to interpose a pad clip or the like between them to stabilize them, especially in order to prevent rattling when the brakes are not being applied.

This type of caliper has a cylinder device on the inner leg on one side of the disk that presses the inner friction pad against the disk, and the outer leg on the other side of the disk forms the reaction part as described above. However, in order to facilitate the cylinder processing of the inner side leg, this reaction part is usually formed to have an opening through which a processing tool is inserted, and therefore the outer side leg is bifurcated. It has a shape with a pair of left and right claws that hang from it. Therefore, by using the left and right claws of the outer leg and the opening in the center as reaction parts, the anti-rattle clip attached to the outer friction pad stably holds the outer friction pad. It is possible that There is also a type shown in Japanese Patent Application Laid-open No. 54-116571 as a method of this type, but this method uses a wire spring material and applies spring force in two directions by its component force, so it is easily affected by variations. However, there is a problem in that it requires strict quality control between products.

From this point of view, the present invention takes into account the shape of a caliper that is movable in the disk axial direction, and the outer friction pad that is pressed against the disk by the outer leg that forms the reaction part of this caliper. It is an object of the present invention to provide a disc brake including an anti-rattle clip which is interposed between the outer friction pad and has a good shape and function to prevent rattling of the outer friction pad.

That is, the gist of the first invention of the present application is that the disk is supported so as to be movable in the axial direction via a vehicle body fixing portion disposed near the edge of the disk, and a slide pin fixed to the vehicle body fixing portion or the slide pin fixed thereto. Inner and outer friction pads face each other with the disc in between, and an inner A caliper having a built-in cylinder mechanism for pressing the pad in the side leg and forming a reaction part for pressing the pad, the outer leg having a bifurcated claw having an opening for cylinder machining, the reaction part of the caliper; In a disc brake equipped with an anti-rattle clip that is assembled between outer-side friction pads and prevents rattling of the outer-side friction pads, the anti-rattle clip is a central fixing clip that is fixed to the back surface of the outer-side friction pads. Part A and
A pair of left and right first extending springs B that engage with the back surfaces of the left and right claws of the caliper reaction portion to cause the back surfaces of the outer friction pads to snap onto the front surfaces of the left and right claws, and extend in the disk circumferential direction from the central fixed portion A.・B extends outward in the disk radial direction from the central fixed portion A, and hits the inner circumferential surface of the caliper reaction portion opening to bias the outer friction pad with a spring force radially inward of the disk. The disc brake is configured to include a third extending spring portion C in the disc radial direction.

Further, the gist of the second invention of the present application is that, in addition to the above configuration, the outer part extends from the central fixing part A in the disc circumferential direction and hits the inner peripheral surface of the caliper reaction part opening on the disc rotation input side. A third extending spring portion D is provided on the side friction pad to apply a bending force toward the disk rotation side.

The present invention will be described below based on embodiments shown in the drawings.

Embodiment 1 In FIGS. 1 and 2, 1 is a disk, 2 is a support integrated with a knuckle (not shown), and 3 ₁ , 3 ₂ are left and right portions fixed to this support 2 in the axial direction of the disk. Pair of slide pins, 4
A caliper is disposed so as to straddle the edge of the disk, and is supported by the slide pins 3 ₁ and 3 ₂ so as to be movable in the axial direction of the disk. 5,
Reference numeral 6 indicates the caliper 4 which faces the disk 1 with the disk 1 in between.
A cylinder 7 is formed in the inner leg part 5 and a hydraulic piston 8 is slidably fitted thereto. 9 is a hydraulic chamber, 10 is a dustproof boot, and 11 is a piston seal. Reference numeral 12 denotes an inner friction pad, which is attached to the front surface of the hydraulic operation pin 8 with a pad clip 17, and is movable in the disk axial direction by a pair of left and right slide pins ₃₁ , ₃₂ , and is used to reduce torque during braking. It is supported so as to receive pressure.

Further, the outer leg portion 6 is formed with a pair of left and right claw portions 13 ₁ and 13 ₂ so as to have an opening opening radially inward of the disk, as shown in FIG.
This opening is provided with a size corresponding to the diameter of the cylinder 7, and allows a tool for machining the cylinder 7 to be inserted therethrough. Reference numeral 14 indicates a shim, and reference numeral 15 indicates an outer friction pad, which is movable in the disk axial direction by the pair of left and right slide pins 3 ₁ and 3 ₂ and supported so as to receive pressure during braking.

Reference numeral 16 denotes an anti-rattle clip interposed between the outer friction pad 15 and the outer leg portion 6 of the caliper 4, and a central fixing portion A which is caulked and attached to the center of the back surface of the outer friction pad 15. , are bent and extended left and right from this central fixed portion A to engage with the back surfaces of the claws 13 ₁ , 13 ₂ of the caliper 4, and the friction pads 15 are attached to the claws 13 ₁ , 13 .
Extending spring portions B ₁ and B ₂ that are elastically engaged with the _two front surfaces;
It is bent and extended radially outward from the central fixed portion A to engage with the inner circumferential surface of the opening of the outer leg portion 6 of the caliper 4, applying a spring force to the friction pad 15 radially inwardly. It is provided with an extension spring C for urging.

Antirattle clip 16 with such a configuration
According to , the outer friction pad 15 is attached to the claw portion 13 of the outer leg portion 6 which is the reaction portion of the caliper 4.
₁ , 13, _{and 2} , and since a reciprocal spring force is applied between the friction pad 15 and the caliper 4 in the radial direction of the disk, it is possible to obtain the effect that no rattling occurs in the friction pad 15 when the brake is not applied. . Further, since the spring forces in the radial direction and the circumferential direction are applied by the spring portions that constitute independent components, there is an effect that a highly reliable product with no variation can be obtained.

Embodiment 2 This embodiment shown in FIGS. 3 to 5 has an anti-rattle clip 11 different from that of embodiment 1.
6 has the same structure except for a slight difference in the structure, so common parts are indicated by 100.
will be added and its explanation will be omitted.

The feature of this example is that a third extending spring part D from the central fixing part A is further provided in a part of the anti-rattle clip 16 of the first embodiment, and this extending spring part D is Extends toward the rotational input side with respect to the rotational direction of the disk shown by the arrow in _FIG .
The reason is that a spring force is applied so as to bias the outer friction pad 115 toward the rotation side of the disk. Therefore, the friction pad 115 is biased by the spring force not only in the radial direction of the disk but also in the rotation direction by the extending spring portions A, B ₁ , B ₂ , C, and D. In addition to obtaining the same effect as 1, the friction pad 115 is further prevented from rattling.

The anti-rattle clip of the present application is a leaf spring, and the pressing force in both the radial and axial directions is directly obtained by independently configured spring parts B and C, so the variation in the pressing force is small and the spring force is large. can be obtained.

As described above, the disc brake according to the present invention can effectively prevent rattling of the outer friction pad through the intervention of a relatively simple anti-rattle clip, and its practical benefits are extremely large. .

[Brief explanation of the drawing]

The drawings all show embodiments of the present invention, and FIG. 1 is a longitudinal cross-sectional view of a disc brake according to the first embodiment, and FIG. 2 is a front view thereof. FIG. 3 is a partial vertical sectional view of the disc brake of Example 2, FIG. 4 is a front view of the same, and FIG. 5 is a partial plan sectional view of the same. 1...Disk, 2,102...Support, 3
₁ , 3 ₂ , 103 ₁ , 103 ₂ ... Slide pin, 4,104 ... Caliper, 5,105 ... Inner side leg, 6,106 ... Outer side leg,
7,107...Cylinder, 8,108...Hydraulic operation piston, 9...Hydraulic chamber, 10,110...Dust-proof boot, 11,111...Piston seal, 1
2,112...Inner side friction pad, 13 ₁ ,
13 ₂ , 113 ₁ , 113 ₂ ... claw portion, 14 ...
Shim, 15,115...outer side friction pad,
16,116...Anti-rattle clip, 17
...Pad clip.

Claims (1)

[Scope of Claims] 1. A vehicle body fixing portion disposed near the edge of the disk, and a vehicle body supporting portion movably supported in the axial direction of the disk via the vehicle body fixing portion or a slide pin fixed thereto, and facing each other with the disk in between. The inner and outer friction pads are arranged to straddle the edge of the disk and are supported movably in the axial direction of the disk via the vehicle body fixing part or the slide pin, and the pads are attached to the inner leg. A caliper having a built-in pressing cylinder mechanism and an outer leg formed of a bifurcated pawl having an opening for cylinder machining, which forms a pad pressing reaction part, and a reaction part of the caliper and an outer friction pad. A disc brake is provided with an anti-rattle clip made of a bent plate material that acts between the outer friction pad and prevents the outer friction pad from rattling, the anti-rattle clip being fixed to the back surface of the outer friction pad. A pair of left and right first pads that engage with the rear surfaces of the left and right pawls of the caliper reaction portion to cause the back surfaces of the outer friction pads to snap onto the front surfaces of the left and right pawls, and extend in the disk circumferential direction from the central fixing portion A. Extending spring portions B and B extend outward in the disk radial direction from the central fixing portion A, and snap onto the inner circumferential surface of the caliper reaction portion opening, causing the outer friction pad to spring inward in the disk radial direction. A disc brake characterized in that it is configured to integrally include a second extending spring part C in the disc radial direction that biases the force. 2. A vehicle body fixing part disposed near the edge of the disc, and an inner and an outer that are movably supported in the axial direction of the disc via the vehicle body fixing part or a slide pin fixed thereto, and are opposed to each other with the disc in between. The friction pad is disposed so as to straddle the edge of the disc and is supported so as to be movable in the axial direction of the disc via the vehicle body fixing part or the slide pin, and the inner leg has a built-in cylinder mechanism for pressing the pad. In addition, there is a caliper whose outer leg is formed of a bifurcated pawl having an opening for cylinder machining and which acts as a reaction part for pressing the pad, and a caliper that acts between the reaction part of the caliper and the outer friction pad. The disc brake is equipped with an anti-rattle clip made of a bent plate material that prevents rattling of the outer-side friction pad, and the anti-rattle clip has a central fixing portion A fixed to the back surface of the outer-side friction pad, and a caliper reaction force. A pair of left and right first extending spring portions B, which engage with the back surfaces of the left and right claw portions of the outer friction pads to snap the back surfaces of the outer friction pads onto the front surfaces of the left and right claw portions, and extend from the central fixing portion A in the disk circumferential direction. B, and a spring that extends outward in the disk radial direction from the central fixing portion A and snaps onto the inner circumferential surface of the caliper reaction portion opening on the disk radially outward side, causing the outer friction pad to spring inward in the disk radial direction. A second spring portion C extending in the disk radial direction that biases the force, and a second spring portion C extending in the disk circumferential direction from the central fixing portion A and impacting the inner circumferential surface of the caliper reaction portion opening on the disk rotation input side. A disc brake characterized in that an outer friction pad is integrally provided with a third extending spring part D that biases a spring force toward the disc rotation side.