JPH0522876U - Car disc brakes for vehicles - Google Patents

Abstract

(57) [Abstract] [Purpose] To improve the rigidity of the bottom wall of the caliper cylinder hole. [Structure] The opening 13 formed in the bottom wall 12 of the cylinder hole 9 of the caliper half 3 is brought into contact with the inner surface of the bottom wall 12 of the cylinder hole 9 by attaching the flange 15 of the plug 14 to the bottom of the cylinder hole 9 around the opening 13. The plate member 18 abutting on the outer surface of the wall 12 is attached to the plug body 14.
It is screwed on with a bolt 20.

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 in a bottom wall 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 on the bottom wall of the cylinder hole, and the opening is closed with a plug. For example, Japanese Patent Application Laid-Open No. 47-31059 discloses a method. The caliper shown has an opening with a diameter smaller than that of the cylinder hole on the bottom wall of the cylinder hole, and the flange of the plug inserted from the cylinder hole side is brought into contact with the bottom wall of the cylinder hole to close the opening. There is.

[0003]

[Problems to be solved by the device]

 However, in the above-mentioned configuration, there is concern that the rigidity of the bottom wall of the cylinder hole may be reduced due to the formation of the opening.

Therefore, an object of the present invention is to provide a caliper for a vehicle disc brake, which can improve the rigidity of a bottom wall of a cylinder hole and can firmly fix a plug body.

[0005]

[Means for Solving the Problems]

 In order to achieve the above object, the present invention forms an opening portion having a diameter smaller than that of the cylinder hole in the bottom wall of the cylinder hole, and the flange of the plug inserted from the cylinder hole side is brought into contact with the bottom wall of the cylinder hole to open. In a caliper for a vehicle disc brake that closes a portion, a plate member that abuts an outer surface of a bottom wall of a cylinder hole around the opening is screwed to the plug with a bolt.

[0006]

[Work]

 With this configuration, since the flange of the plug body and the plate member sandwich the bottom wall of the cylinder hole and are fastened with bolts, the plug body can be firmly fixed and the rigidity of the bottom wall of the cylinder hole can be improved.

[0007]

【Example】

 An embodiment in which the present invention is applied to a piston facing type four pot caliper will be described below with reference to the drawings.

The caliper 1 integrally includes a caliper half 3 arranged on one side surface of the brake disc 2, a caliper half 4 arranged on the other side surface, and a bridge portion 5 straddling the outer periphery of the brake disc 2. It is cast and formed into an open top type with an opening in the center of the bridge portion 5, and friction pads 6 and 6 are arranged in the opening of the bridge portion 5 on opposite sides of the brake disc 2 by means of a hanger pin 7. I'm hanging.

The caliper half 3 is formed with mounting arms 8 and 8 for mounting on a vehicle body side bracket and cylinder holes 9 and 9, and the caliper half 4 is provided with cylinder holes 9 and 9 of the caliper half 3. Cylinder holes 10 and 10 are formed facing each other, and a piston 11 is fitted in each cylinder hole 9 and 10 so as to be liquid-tight and movable.

In the bottom wall 12 of each of the cylinder holes 9, 9, an opening 13 for machining is formed with a diameter smaller than that of the cylinder hole 9, and the opening 13 is inserted from the friction pad 6 side. It is closed by the body 14.

The plug body 14 secures liquid tightness of the cylinder hole 9 by means of a seal ring 16 mounted around the outer periphery of the flange 15, and the flange 15 is brought into contact with the inner surface of the bottom wall 12 of the cylinder hole 9 to open the opening. A rotation stopping portion 17 is projected from the portion 13 to the outer surface of the cylinder hole 9 and the bottom wall 12.

On the outer surface of the bottom wall 12 of the cylinder hole 9, a plate member 18 having a width wider than the diameter of the cylinder hole 9 and a length close to substantially the entire length of the caliper half 3 is arranged, and the engagement formed on the plate member 18 is arranged. The detent portion 17 of the plug body 14 is inserted into the hole 19, and the plate member 18 is brought into contact with the outer surface of the bottom wall 12 of the cylinder hole 9 by the bolt 20 screwed into the detent portion 17 to be attached to the plug body 14. Installed.

According to this structure, the flange 15 of the plug body 14 and the plate member 18 sandwich the bottom wall 12 of the cylinder hole 9 and are fastened by the bolt 20, so that the plug body 14 can be firmly fixed. The rigidity of the bottom wall 12 of the cylinder hole 9 can be improved.

In the above embodiment, the plate material 18 is described as having a length that covers both cylinder holes 9, 9, but it may be provided for each cylinder hole, and fins are formed on the plate material 18. Thereby, the cooling effect of the caliper 1 can be improved.

Further, in the above embodiment, the present invention has been described as being applied to the piston facing type 4-pot caliper, but the present invention can be applied to a 2-pot type or pin slide type caliper.

[0016]

[Effect of the device]

 As described above, the present invention provides a caliper for a vehicle disk brake, wherein the opening formed in the bottom wall of the cylinder hole is closed by bringing the flange of the plug inserted from the cylinder hole side into contact with the bottom wall of the cylinder hole. Since the plate material that abuts the outer surface of the bottom wall of the cylinder hole around the opening is screwed to the plug body with the bolt, the flange of the plug body and the plate material are clamped by the bolt while sandwiching the bottom wall of the cylinder hole. The plug body can be firmly fixed, and the rigidity of the bottom wall of the cylinder hole can be improved.

[Brief description of drawings]

1 is a sectional view taken along line I-I of FIG.

[Figure 2] Front view of the caliper

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Caliper, 2 ... Brake disk, 3, 4 ... Caliper half, 5 ... Bridge part, 6, 6 ... Friction pad, 9 ... Caliper half 3 cylinder hole, 10 ... Caliper half 4 cylinder hole, 11 ... piston, 12 ... bottom wall of cylinder hole 9, 13 ... opening, 14 ... plug, 15 ... flange of plug, 17 ... stopper part of plug, 18 ... plate, 20 ... bolt

Claims (1)

[Scope of utility model registration request] 1. A vehicle body having an opening having a diameter smaller than that of the cylinder hole formed in the bottom wall of the cylinder hole, and a flange of a plug inserted from the cylinder hole side being brought into contact with the bottom wall of the cylinder hole to close the opening. A caliper for a disc brake for a vehicle, wherein a plate member that abuts an outer surface of a bottom wall of a cylinder hole around the opening is screwed to the plug body with a bolt.