JPH0244107Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to a shim plate structure that is double-attached to the friction pad of a vehicle disc brake.

[Conventional technology]

In vehicle disc brakes used in four-wheeled vehicles and motorcycles, a shim plate is attached to the back of the friction pad that makes sliding contact with the disc rotor for the purpose of preventing brake squeal and providing insulation. For example, the shim plate structure was created by overlapping the shim plates to further improve the heat insulation effect.
There is one disclosed in Publication No. 187632.

This technology includes an elastic material coating shim having projections protruding toward the side opposite to the back plate of the friction pad at at least two locations, and a hole disposed opposite to the coating shim and fitting with the projection, It also comprises a metal plate having a plurality of elastic legs that sandwich the back plate, and an elastic material coating shim and the metal plate are attached to the back surface of the back plate in a superimposed manner.

[Problem that the invention attempts to solve]

However, in the above-mentioned device, since it is possible to attach only the outer metal plate having the elastic leg portions, the inner elastic material coating shim may be forgotten to be attached during initial assembly or maintenance.

SUMMARY OF THE INVENTION An object of the present invention is to provide a shim plate structure for a friction pad of a vehicle disc brake that can be installed without using both the inner and outer plates, thereby preventing forgetting to assemble the shim plate.

[Means for solving problems]

In order to achieve the above-mentioned object, the present invention is a friction pad shim for a vehicle disc brake in which an inner plate and an outer plate are attached to the back of a back plate of a friction pad to which a lining that is in sliding contact with a disc rotor is fixed. In the plate, the inner plate has a locking claw that is locked to one side of the backing plate, and the outer plate has a locking claw that is locked to the other side of the backing plate, and the inner plate and the outer plate are formed with a locking claw that is locked to one side of the backing plate. It is characterized by being fitted and combined.

[Effect]

According to the above configuration, since the plates cannot be assembled to the back plate unless both plates are fitted, it is possible to prevent forgetting to assemble them.

〔Example〕

Hereinafter, a first embodiment of the present invention will be described based on FIGS. 1 to 3.

In the disc brake 1, a floating caliper 3 is supported by a bracket 2 fixed to the vehicle body so as to be slidable in the axial direction of a disc rotor 4, and the caliper 3 has a pair of friction pads arranged between the disc rotor 4. 5 and 6 are arranged facing each other.

The caliper 3 has an action portion 3 on the friction pad 5 side.
a, a reaction part 3b on the side of the friction pad 6, and a bridge part 3c connecting these parts by straddling the outer periphery of the disc rotor 4. The friction pad 6 is pushed by the reaction claw 9 of the caliper 3, which slides toward the action portion 3a as the piston 8 moves forward.

The friction pads 5 and 6 include a back plate 10 that is attached to the caliper 3 by suspending the ears 0a and 10a on both sides, and a lining that is fixed to the front surface of the back plate 10 and makes sliding contact with the disc rotor 4. A shim plate 14 consisting of an inner plate 12 and an outer plate 13 is attached to the back surface 10b of the back plate 10.

The shim plate 14 is attached to the back surface 10b of the back plate 10 by fitting the plates 12 and 13 together, and has a heat insulating effect that blocks the frictional heat generated in the lining 11 from being transmitted to the piston 8 and caliper 3. The inner plate 12 is made of a metal plate coated with an elastic sheet such as rubber in order to damp vibration and prevent brake squeal, and the outer plate 13 is made of a stainless steel plate. .

The inner plate 12 has both side pieces 12a, 12a
A protruding piece 12b between the side pieces 12a is provided so as to protrude stepwise toward the back plate 10 so that a gap equal to the thickness of the outer plate 13 is created between the protruding piece 12b and the side piece 12a. A pair of locking claws 12c, 12c to be locked to the upper surface 10c of the plate 10 are bent, and step portions 12d, 12d on both sides of the protruding piece 12b are formed.
A slit 12e is formed in each of the slits 12d extending approximately halfway from the locking claw 12c side.

Further, the outer plate 13 is a flat plate whose outer shape is approximately the same as that of the inner plate 12, and a pair of locking claws 13a, 13a, which are locked to the lower surface 10d of the back plate 10, are folded on both sides of the lower part of the plate 13. The stepped portions 12d, 1 of the inner plate 12 are bent.
A slit 13 is provided at a position opposite to 2d.
b is formed approximately halfway from the locking claw 13a side.

Then, with the inner plate 12 on the lower side and the outer plate 13 on the upper side, both slits 12
When e and 13b are inserted, the shim plate 14 is assembled as shown in FIG. 3, and the shim plate 14 is
The respective locking claws 12c and 13a are locked to the upper and lower surfaces 10c and 10d of the back plate 10, and the back plate 10 is attached to the friction pads 5 and 6.

In this embodiment, as described above, the inner plate 12
By simply inserting both the slits 12e and 13b formed in the outer plate 13, the shim plate 14 can be easily integrated.
If 3 is not combined, the structure cannot be attached to the back plate 10 with only the locking claws on one side, so it not only prevents forgetting to assemble it, but also because the slits 12e and 13b are formed from the respective locking claws 12c and 13a side. After assembly, both plates 12 and 13 will not loosen in the removal direction.

In addition, since the inner plate 12 is coated with an elastic material and the outer plate 13 is formed of a stainless steel plate, the elastic coating layer of the inner plate 12 is not damaged by the reaction claws 9 of the piston 8 or the caliper 3, and vibrations are prevented. The damping effect can be maintained for a long period of time.

FIG. 4 shows a second embodiment of the present invention, which is a modification of the first embodiment. The claws are formed in the direction of rotation of the disc rotor.

That is, one side piece 12a of the inner plate 12
A pair of locking claws 12f, 12f are provided on the sides of the back plate 10, which narrow the lug 10a of the back plate 10 and are locked to one side 10e of the back plate 10.
On the opposite side of the outer plate 13 facing the
Similarly, by narrowing the lug 10a of the back plate 10, the other side 10
A pair of locking claws 13c, 13c that are locked to f are respectively bent, and for example, the locking claw 12
If f and 12f are on the retraction side of the disc rotor 4, the locking claws 13c and 13c are formed on the retraction side.

In this embodiment, in addition to the insertion of both the slits 12e and 13b, the locking claws 12f and 13c sandwich the side surfaces 10e and 10f of the back plate 10, so that rattling due to the dragging of the disc rotor 4 can be prevented. More secure installation is possible.

5 and 6 relate to the third embodiment of the present invention, FIG. 5 shows the molded state, and FIG. 6 shows the assembled shim plate by fitting the molded inner and outer plates. show.

Inner plate 20 and outer plate 21
2 side pieces are placed on both sides of the stacked flat plates of the same shape.
Leaving 0a, 20a, 21a, 21a, the central protruding pieces 20b, 21b protrude to one side in steps corresponding to the thickness of the plate, and the extending pieces at the bottom of each side piece 20a, 21a are bent to the opposite side. The locking claws 20c, 20c,
21c, 21c, and the protruding pieces 20b, 2
Slits 20d and 21b extending approximately halfway from the locking claws 20c and 21c are simultaneously formed in the step portions on both sides of 1b.

Then, when both the slits 20d and 21d are inserted with the locking claws 20c and 21c on the same side, the sixth
The combined shim plate 22 shown in the figure is formed.

In this embodiment, since the inner plate 20 and the outer plate 21 can be molded simultaneously, moldability can be improved and costs can be reduced.

Further, FIGS. 7 and 8 show a fourth embodiment, in which a back plate 10 is provided on the upper part of the inner plate 30.
A pair of locking claws 30 that are locked to the upper surface 10c of the
a, 30a are at the bottom of the outer plate 31,
A pair of locking claws 31a, 31a that are locked to the lower surface 10d of the back plate 10 are each bent.

Slits 31 are provided on both sides of the outer plate 31.
b, 31b are formed in upper and lower positions, and claw pieces 30b that engage with these slits 31b are provided protruding from both sides of the inner plate 30, and each claw piece 30b
The shim plate 3 is assembled by engaging with the slit 31b.
3, each of the upper and lower locking claws 30a, 31a is attached to the back plate 1.
The friction pads 5 and 6 are attached to the upper and lower surfaces 10c and 10d of the friction pads 5 and 6, respectively.

Note that the materials of the inner and outer plates of the present invention are not limited to those in the above embodiments; for example, the inner plate may be made of the same stainless steel plate as the outer plate.

[Effect of idea]

As explained above, in the present invention, the shim plate is composed of an inner plate and an outer plate. In addition to forming locking claws that lock on the sides, the inner plate and outer plate are fitted and combined to attach to the back plate, so if both plates are not combined, friction pads will occur. Since it cannot be attached, it is possible to prevent forgetting to assemble it and to reliably achieve the improvement in heat insulation, which is the main purpose of the double plate.

[Brief explanation of the drawing]

1 to 3 show a first embodiment of the present invention, in which FIG. 1 is a sectional front view of a disc brake, FIG. 2 is an exploded perspective view of a friction pad and a shim plate, and FIG.
The figure is a perspective view of the combined shim plate, and FIG. 4 is an exploded perspective view of the friction pad and shim plate showing the second embodiment.
Figures 5 and 6 show the third embodiment, Figure 5 is a perspective view showing the molded state of the inner and outer plates constituting the shim plate, and Figure 6 shows the molded inner and outer plates fitted together. FIGS. 7 and 8 show the fourth embodiment, FIG. 7 is a rear view of the friction pad with the combined shim plates attached, and FIG. FIG. 1... Disc brake, 3... Caliper, 3
a...Action part, 3b...Reaction part, 4...Disc rotor, 5, 6...Friction pad, 8...Piston, 9...Reaction claw, 10...Back plate, 10a...Ear piece, 10b...Back, 10c...Top side, 10d
...Lower surface, 12...Inner plate, 12a...
...Side piece, 12b... Projecting piece, 12c... Locking claw,
12d...Stepped portion, 12e...Slit, 13...
Outer plate, 13a...Locking claw, 13b...
Slits, 14...Shim board.

Claims (1)

[Scope of Claim for Utility Model Registration] 1. In a shim plate of a friction pad of a vehicle disc brake in which an inner plate and an outer plate are attached to the back of a back plate of a friction pad to which a lining that is in sliding contact with a disc rotor is fixed, The inner plate is formed with a locking pawl that is locked to one side of the back plate, and the outer plate is formed with a locking pawl that is locked to the other side of the back plate, and the inner plate and the outer plate are fitted together. A shim plate structure for friction pads of a vehicle disc brake, which is characterized by being combined together. 2 The above inner plate and outer plate are
A shim plate structure for a friction pad of a disc brake for a vehicle as claimed in claim 1, characterized in that the shim plate structure is assembled by inserting both slits formed therein.