JPH0749084Y2 - Calipers for vehicle disc brakes - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a caliper for a vehicle disc brake in which an opening formed at the bottom of a cylinder hole is closed with a plug.

[0002]

2. Description of the Related Art In this type of caliper, an opening for machining the cylinder hole is formed at the bottom of the cylinder hole, and the opening is closed with a plug.
In the caliper disclosed in Japanese Patent No. 31059, an opening having a diameter smaller than that of the cylinder hole is formed at the bottom of the cylinder hole, and a flange of a plug inserted from the cylinder hole side is brought into contact with the bottom of the cylinder hole to close the opening. I'm out.

In the caliper disclosed in Japanese Utility Model Publication No. 61-2259, a plug is screwed into an opening having a diameter slightly larger than that of a cylinder hole to close the opening, and the loosened plug is loosened. A press plate is attached to the outside of the caliper to prevent it from coming off.

[0004]

However, in the former configuration, there is a concern that the rigidity of the bottom of the cylinder hole may be reduced due to the formation of the opening, and in the latter configuration, the stopper screwed by the repeated hydraulic action. Body slackness is expected.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a caliper for a vehicle disc brake, which is capable of improving the rigidity of the bottom portion of the cylinder hole and firmly fixing the plug body to prevent loosening and coming off.

[0006]

In order to achieve the above object, the present invention provides a caliper for a vehicle disc brake, wherein an opening is formed at the bottom of a cylinder hole, and the opening is closed with a plug.
A bolt hole is formed in each of the opening peripheral wall of the caliper and the plug body in a direction orthogonal to the axis of the cylinder hole, and the plug body is fixed by bolts inserted into both bolt holes. There is.

[0007]

[Operation] Since the plug body is fixed by the bolts inserted in the direction orthogonal to the axis of the cylinder hole by such a configuration, the plug body can be firmly fixed and the rigidity of the bottom portion of the cylinder hole can be improved.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment in which the present invention is applied to a piston facing type caliper will be described below with reference to FIG.

The caliper 1 connects a caliper half 3 arranged on one side surface of the brake disc 2 and a caliper half 4 arranged on the other side surface thereof with a bridge portion 5 straddling the outer circumference of the brake disc 2. The bridge portion 5 is integrally cast-molded into an open top type having an opening in the center, and friction pads 6, 6 that are arranged opposite to each other on both sides of the brake disc 2 are suspended by hanger pins 7 in the opening of the bridge portion 5. It

Cylinder hole 8 formed in the caliper half 3
And the cylinder hole 9 formed in the caliper half 4 so as to face the cylinder hole 8 is machined from an opening 10 formed at the bottom of the cylinder hole 8 and having a diameter slightly larger than the cylinder hole 8. The opening 10 is liquid-tightly closed from the outside of the cylinder hole 8 with a plug 11, and the piston 12 is fitted in the cylinder holes 8 and 9 so as to be liquid-tight and movable. Has been done.

A bolt through hole 13 is formed in the plug body 11 in a direction orthogonal to the axis of the cylinder hole 8, and the opening 10 is formed.
A bolt insertion hole 15 is formed on the outer peripheral side of the brake disc, and a bolt screw hole 16 is formed on the inner peripheral side of the peripheral wall 14 of the brake disc 2.
5. The plug 11 is fixed by the bolt 17 inserted in the bolt through hole 13.

With this configuration, the plug 11
Is firmly fixed to the peripheral wall 14 of the opening 10 and liquid-tightly closes the bottom of the cylinder hole 8, so that the rigidity of the bottom of the cylinder hole 8 can be improved, and by removing the bolt 17,
Maintenance of the cylinder hole 8 and the piston 12 can be easily performed.

FIG. 2 shows a second embodiment of the present invention.
In the figure, the same parts as those in the first embodiment are designated by the same reference numerals and the description thereof will be omitted.

Opening 1 formed at the bottom of cylinder hole 8
The plug 20 that closes 0 is fixed to the peripheral wall 14 with a bolt 21 screwed from the outer peripheral side of the brake disc of the peripheral wall 14 of the opening 10 and a bolt 22 screwed from the inner peripheral side, and the first embodiment is used. Similar to the example, the rigidity of the bottom of the cylinder hole 8 is improved.

FIG. 3 shows a third embodiment of the present invention.
The opposed four-pot type caliper 30 has cylinder holes 32 and 33 on one side of the brake disc 31 and cylinder holes 34 and 35 on the other side in the circumferential direction of the brake disc 31, respectively. The openings 36 and 37 formed at the bottom are covered with stoppers 38 and 39.

The stoppers 38, 39 are provided with a peripheral wall 40 of the opening 36.
Through the partition wall 41 between the openings 36, 37
It is fixed by bolts 43 that are threadedly inserted through the circumferential wall 42 of the brake disc 31 in the circumferential direction.

As described above, by fixing the two plugs 38 and 39 with the single bolt 43, the rigidity of the bottoms of the cylinder holes 32 and 33 can be improved as in the above-described embodiments, and the plugs 38 can be improved. , 39 can be firmly and easily fixed.

In each of the above embodiments, the present invention has been described as being applied to a piston facing type caliper, but the present invention can be applied to a pin slide type caliper.

[0019]

As described above, the present invention relates to a caliper for a vehicle disc brake in which an opening formed at the bottom of a cylinder hole is closed with a plug, and a peripheral wall of the opening of the caliper,
Bolt holes are formed in the plug body in a direction orthogonal to the axis of the cylinder hole, and the plug bodies are fixed by bolts inserted in both bolt holes, so that the plug bodies can be firmly fixed and the cylinder hole The rigidity of the bottom of the can be improved.

[Brief description of drawings]

FIG. 1 is a sectional view of a caliper showing a first embodiment of the present invention.

FIG. 2 is a sectional view of a caliper showing a second embodiment of the present invention.

FIG. 3 is a sectional plan view of a caliper showing a third embodiment of the present invention.

[Explanation of symbols]

1, 30 ... caliper, 2, 31 ... brake disc,
3, 4 ... Caliper half, 5 ... Bridge portion, 6, 6 ... Friction pad, 8 ... Caliper half 3 cylinder hole, 9 ... Caliper half 4 cylinder hole, 10 ... Opening portion, 11, 20 ... Plug Body, 12 ... Piston, 13 ... Bolt through hole of plug body, 14
... peripheral wall of opening, 15 ... bolt insertion hole of peripheral wall, 16 ... bolt screwing hole of peripheral wall, 17, 21, 22 ... bolt, 32,
33, 3435 ... Cylinder holes, 37, 38 ... Openings, 3
8, 39 ... Plug, 43 ... Bolt

Claims (1)

[Scope of utility model registration request] 1. A caliper for a vehicle disc brake, wherein an opening is formed at the bottom of a cylinder hole, and the opening is closed with a plug, and a shaft of the cylinder hole is provided in the opening peripheral wall of the caliper and the plug. A caliper for a disc brake for a vehicle, characterized in that a bolt hole is formed in a direction orthogonal to the center, and the plug is fixed by a bolt inserted into both bolt holes.