JP2545556Y2 - Disc brake device - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disc brake device.

[0002]

2. Description of the Related Art Japanese Utility Model Publication No. Hei 2-2984 shows an example of a conventional disc brake device. As shown in FIG. 2 of the publication, a cover shim 22 has a projection 21a of an inner shim 21.
The piston boot 17 is protected by providing a cover portion 23 that covers the upper end side of the piston boot 17. In this case, the cover portion 23 and the piston boot 17 come into substantially flat contact with each other. The loss can be prevented.

[0003]

By the way, in the above-mentioned apparatus disclosed in Japanese Utility Model Publication No. 2-2984, in order to reassemble the kyara 13 after replacing the pad, it is necessary to use a caliper housing the piston 16 in FIG. 13 is moved to the right side of the figure and further moved downward, or the pad 14 with the shims 21 and 22 is moved to the left side and moved further upward to complete the operation. However, in this device, as shown in FIG. 5, during reassembly after pad replacement,
In some cases, the boot 17 was caught on the open end face side of the piston 16, was caught between the piston 16 and the cover shim 22, and was cut.

[0004]

According to the present invention, to solve the above-mentioned problems, an opening of a cylinder hole formed in a caliper straddling a part of an outer periphery of a disk rotor, and an outer end of a piston in the cylinder are provided. A boot is interposed between the outer peripheral surface of the portion and the caliper. The caliper is supported on a carrier fixed to a non-rotating member of the vehicle by a pair of guide pins so as to be movable in the axial direction of the rotor. In a disc brake device in which a shim is interposed between the back metals of the pads opposed to each other and a pad can be replaced by rotating a caliper about one of the guide pins as a fulcrum, the outer peripheral portion of the shim has a rotor side. When the caliper is rotated and the open end face of the piston comes into contact with the tongue, the caliper and the pad are moved away from each other along the inclined surface of the tongue. So as to movement constituting the disc brake device.

[0005]

As described above, in the present invention, since the tongue inclined toward the rotor is formed on the outer periphery of the shim, when the caliper is rotated, the piston accommodated in the caliper moves along the inclined surface. Therefore, the relative movement between the caliper and the pad becomes possible. Therefore, complicated re-assembly work can be easily performed only by turning the caliper, and furthermore, the boot can be prevented from being cut. If the tongue of the shim is provided at a position corresponding to the window of the caliper, there is no limitation on space.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. In the figure, 1 is a disk rotor, 2 is a carrier fixed to a non-rotating member of the vehicle, 3 and 4 are a pair of guide pins projecting from the carrier 2 and 5 are these guide pins 3,
A caliper 5a is slidably provided with respect to 4, and 5a is an actuator portion thereof, 5b is a reaction portion, and a piston 6 is slidably fitted in a cylinder hole 5c formed in the actuator portion 5a. 7 is a boot made of elastic material,
One end of the piston 6 fits into an annular groove 5d formed in the opening of the cylinder hole 5c of the caliper 5, and the other end
Into an annular groove 6b formed on the outer peripheral surface of the open end 6a.

Reference numerals 8 and 9 denote inner pads and outer pads which are pressed against both sides of the rotor 1 to perform braking, and are movably mounted on the carrier 2. An inner shim 10 and an outer shim 11 inserted between the inner pad 8 and the piston 6 are attached to the back metal 8a of the inner pad 8 by caulking to a projection 8b protruding from the back metal 8a. A tongue 11a inclined toward the rotor 1 protrudes from an outer peripheral portion of the outer shim 11, and both sides of the tongue 11a in the circumferential direction are provided.
11b is further bent on the rotor 1 side. Reference numeral 12 denotes a sealing member for sealing the cylinder hole 5c and the piston 6 in a liquid-tight manner, reference numeral 13 denotes a pad wear indicator fixed to the back metal 8a, and reference numeral 14 denotes a pad retract spring provided between the two pads.

If the pads 8 and 9 are worn down to the use limit, one of the guide pins 3 is pulled out and the other guide pin 4 is removed.
The pads 8 and 9 are exchanged by rotating the caliper 5 about the fulcrum. For reassembly after replacement, when the caliper 5 is rotated in the reverse direction, the open end 6a of the piston 6 housed in the caliper 5
Is pushed along the inclined surface of the tongue 11a formed on the outer shim 11, and as a result, the caliper 5 and the inner pad 8
Moves relative to each other, and the caliper 5 returns to the initial state. At this time, the boot 7 mounted on the open end 6a of the piston 6 also moves along the inclined surface of the tongue 11a, so that the boot 7 does not get caught in the open end 6a of the piston 6, thereby preventing cutting. . Further, if the tongue portion 11a of the outer shim 11 is provided at a position corresponding to the window hole 5e of the caliper 5, the outer diameters of the pads 8, 9 are not restricted.

The method of attaching the shims 10 and 11 to the back metal 8a is not limited to the above-described embodiment.
A plurality of locking claws bent at the end of the rotor 1 may be provided to elastically lock the back metal 8a, and the inner shim 10 is provided within a certain range between the back metal 8a and the outer shim 11. It may be movably inserted, and the inner shim 10 itself may be omitted. Further, the shims 10, 11 may be coated with an elastic material or have a heat insulating effect.

[0010]

[Effect of the Invention] As described above, in the present invention, the shim 11
Since the tongue 11a inclined toward the rotor 1 is formed on the outer periphery of the caliper 5, when the caliper 5 is rotated, the piston 6 accommodated in the caliper 5 moves along the inclined surface of the tongue 11a. And the pad 8 can be moved relative to each other. Therefore, according to the present invention, it is possible to obtain an effect that complicated re-assembly work can be easily performed only by turning the caliper 5, and the boot 7 can be prevented from being cut. If the tongue 11a of the shim 11 is provided at a position corresponding to the window 5e of the caliper 5, the tongue 11a does not limit the space.

[Brief description of the drawings]

FIG. 1 is a plan view of the device of the present invention.

FIG. 2 is a sectional view taken along line XX of FIG.

FIG. 3 is a rear view of the inner pad.

FIG. 4 is a side view of FIG. 3;

FIG. 5 is a partial sectional view of a conventional device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Disc rotor 2 Carrier 3, 4 Guide pin 5 Caliper 6 Piston 7 Boot 8 Inner pad 9 Outer pad 10 Inner shim 11 Outer shim 12 Seal member 13 Pad wear indicator 14 Pad retract spring

Claims (1)

(57) [Scope of request for utility model registration] 1. A boot is inserted between an opening of a cylinder hole formed in a caliper straddling a part of an outer periphery of a disk rotor and an outer peripheral surface of an outer end of a piston in the cylinder. A carrier fixed to a non-rotating member of the vehicle is supported by a pair of guide pins so as to be movable in the axial direction of the rotor, and a shim is interposed between an open end surface of the piston and a back metal of a pad facing the piston. In a disc brake device in which a caliper is rotated with one of the guide pins as a fulcrum and a pad can be replaced, a tongue inclined toward a rotor is protruded from an outer peripheral portion of the shim, and the caliper is rotated to rotate a piston. A disc brake device wherein the caliper and the pad relatively move along the inclined surface of the tongue when the opening end face of the abutment contacts the tongue.