JPH0522875U - Car disc brakes for vehicles - Google Patents

Abstract

(57) [Abstract] [Purpose] To improve the rigidity of the bottom of the cylinder hole of the caliper. An opening 10 formed at the bottom of a cylinder hole 8 of a caliper half 3 is closed with a plug 11, and a peripheral wall 14 of the opening 10 is closed.
And bolt holes 13, 14 and 16 respectively in the plug body 11 and in the direction orthogonal to the axis of the cylinder hole.
The plug 1 is attached by a bolt 17 inserted through 3, 14, 16
Fix 1

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a caliper for a vehicle disk brake in which an opening formed at the bottom of a cylinder hole is closed with a plug.

[0002]

[Prior 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. For example, it is disclosed in Japanese Patent Laid-Open No. 47-31059. The caliper has an opening having a diameter smaller than that of the cylinder hole at the bottom of the cylinder hole, and the flange of the plug inserted from the cylinder hole side is brought into contact with the bottom of the cylinder hole to close the opening.

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 screw is loosened. A press plate is attached to the outside of the caliper to prevent it from coming off.

[0004]

[Problems to be solved by the device]

 However, in the former configuration, there is concern that the rigidity of the bottom of the cylinder hole may decrease due to the formation of the opening, and in the latter configuration, loosening of the plug body screwed by repeated hydraulic action is expected.

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

[0006]

[Means for Solving the Problems]

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

[0007]

[Work]

 With this configuration, since the plug body is fixed by the bolt inserted in the direction orthogonal to the axis of the cylinder hole, the plug body can be firmly fixed and the rigidity of the bottom portion of the cylinder hole can be improved.

[0008]

【Example】

 Hereinafter, a first embodiment in which the present invention is applied to a piston facing type caliper will be described with reference to FIG.

The caliper 1 connects a caliper half 3 arranged on one side of the brake disc 2 and a caliper half 4 arranged on the other side by a bridge portion 5 that straddles the outer periphery of the brake disc 2. Then, friction pads 6 and 6 are integrally cast and formed in an open top type in which the center of the bridge portion 5 is opened, and the both sides of the brake disc 2 are opposed to each other by the hanger pin 7 at the opening of the bridge portion 5. Be hung.

The 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 are formed at the bottom of the cylinder hole 8 by the cylinder hole 8. It is formed by machining from an opening 10 having a slightly large diameter. The opening 10 is liquid-tightly closed from the outside of the cylinder hole 8 by a plug body 11, and each cylinder hole 8, Pistons 12 are fitted in the respective parts 9 so as to be liquid-tight and movable.

A bolt through hole 13 is formed in the plug body 11 in a direction orthogonal to the axial center of the cylinder hole 8, and a bolt insertion hole 15 is formed on the outer peripheral side of the brake disc in the peripheral wall 14 of the opening 10. Bolt screw holes 16 are formed on the inner peripheral side, respectively, and the plug 11 is fixed by bolts 17 inserted through the bolt insertion holes 15 and the bolt through holes 13 from the outer peripheral side of the brake disc 2.

With this structure, 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. Therefore, the rigidity of the bottom of the cylinder hole 8 is improved. Also, by removing the bolt 17, maintenance of the cylinder hole 8 and the piston 12 can be facilitated.

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.

The plug 20 that closes the opening 10 formed at the bottom of the cylinder hole 8 is screwed from the outer peripheral side of the brake disc of the peripheral wall 14 of the opening 10 and the inner peripheral side. It is fixed to the peripheral wall 14 by means of bolts 22 and improves the rigidity of the bottom portion of the cylinder hole 8 as in the first embodiment.

FIG. 3 shows a third embodiment of the present invention. An opposed 4-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. The brake discs 31 are arranged side by side in the circumferential direction, and the openings 36, 37 formed at the bottoms of the cylinder holes 32, 33 are closed by plugs 38, 39.

The plugs 38 and 39 are screwed in the circumferential direction of the brake disc 31 through the peripheral wall 40 of the opening 36, the partition wall 41 between the openings 36 and 37, and the peripheral wall 42 of the opening 37. It is fixed with a bolt 43.

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 and the plugs can be improved, as in the above-described embodiments. The bodies 38, 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]

[Effect of the device]

 As described above, the present invention provides 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 the opening wall of the caliper and the plug have a shaft center of the cylinder hole, respectively. Since the bolt holes are formed in the orthogonal direction and the plugs are fixed by the bolts inserted into both bolt holes, the plugs can be firmly fixed and the rigidity of the bottom portion of the cylinder hole 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 each of the peripheral wall of the opening 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.