JPH1130252A - Divided caliper for disc brakes for vehicles - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To reduce deviation of a caliper half between caliper halves due to a braking torque in a disk rotation direction, and to reduce uneven wear, squeal, and snagging of a friction pad due to deformation of a caliper half on a vehicle body mounting side. And improve the braking efficiency. SOLUTION: A vehicle body mounting bolt 1 for mounting a first caliper half 3 of a facing piston type caliper 1 to a vehicle body fixing portion 15 is provided.
6, a female screw hole 16b is formed in the disk outer peripheral side head 16a in the disk axial direction, and the male screw portion 7a of the connecting bolt 7 for connecting the second caliper half 4 to the first caliper half 3 is screwed into the female screw hole 16b. I do.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a split caliper for a vehicle disk brake.

[0002]

2. Description of the Related Art Opposed piston calipers, which are one type of split calipers for a disk brake for a vehicle, are disposed on both side surfaces of a disk rotor as shown in, for example, Japanese Patent Application Laid-Open No. 7-119774. The two caliper halves defining a hydraulic chamber by inserting a piston into the formed cylinder hole are connected to each other by a plurality of connection bolts on the outer peripheral side of the disc to be integrated, and a friction pad of one of the caliper halves is provided. The caliper half is attached to the vehicle body fixing portion with two vehicle body mounting bolts arranged on both sides of the torque receiving surface from the disk outer peripheral side to the inner peripheral side, respectively.

[0003]

However, the split-type calipers receive the braking torque generated in the disk rotation direction at the time of braking on the torque receiving surfaces of the respective caliper halves. The body is mounted on the vehicle body fixing part with the vehicle body mounting bolt, but the other caliper half is connected to the vehicle body mounting side caliper half by the connecting bolt, so that the caliper half A disc rotation direction shift occurs, and the shift is attempted to be supported only by the connecting bolts, which results in large deformation of the caliper half on the vehicle body mounting side, causing uneven wear, squealing, and dragging of the friction pad. There is.

Accordingly, the present invention reduces the displacement of the caliper halves in the disk rotation direction due to the braking torque, and reduces the uneven wear, squeal, and snagging of the friction pads due to the deformation of the caliper halves on the vehicle body mounting side. An object of the present invention is to provide a split caliper of a disc brake for a vehicle with improved braking efficiency.

[0005]

SUMMARY OF THE INVENTION In order to achieve the above-mentioned object, the present invention relates to a method in which two caliper halves arranged on both side surfaces of a disk rotor are connected by a plurality of connecting bolts on the outer peripheral side of the disk. In the split caliper of the disc brake for a vehicle, the caliper half is mounted on the vehicle body fixing portion with a plurality of vehicle body mounting bolts respectively arranged from the disk outer peripheral side to the inner peripheral side. A female screw hole is formed in the axial direction of the disk, and a male screw portion at the tip of the connection bolt is screwed into the female screw hole.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in more detail based on embodiments shown in the drawings. The opposing piston caliper 1 comprises a first caliper half 3 and a second caliper half 4 arranged on both side surfaces of a disk rotor 2 and six connecting bolts 5, 5, 6, 6, 7 on the outer peripheral side of the disk. , 7
And are integrally formed.

A first caliper half 3 and a second caliper half 4
Respectively form cylinder holes 3a, 3a, 4a, 4a, and each of the cylinder holes 3a, 3a, 4a, 4a has a piston 8 formed therein.
Into each of the cylinder holes 3 so as to be liquid-tight and movable.
Hydraulic pressure chambers 9 are defined between a, 3a, 4a, 4a and the bottom of the piston 8, respectively.

The first caliper half 3 has a cylinder bore 3
A supply passage 10 for supplying the working fluid to the a and 3a is formed, and a supply passage 11 for supplying the working fluid to the cylinder holes 4a and 4a is also formed in the second caliper half 4. Outside the caliper 1 is a first caliper half 3
Cylinder hole 3a of the second caliper half 4
A communication pipe 12 that connects the two hydraulic chambers 9 and 9a is provided.

A pair of friction pads 13, 13 is provided between the pistons 8, 8 of the first caliper half 3 and the side of the disk rotor 2 and between the pistons 8, 8 of the second caliper half 4 and the side of the disk rotor 2. Are suspended by hanger pins 14, 14 suspended between the first caliper half 3 and the second caliper half 4, and the friction pads 13, 13
Is pushed by the piston 8 moving toward the disk rotor 2 due to the pressure increase of the hydraulic fluid supplied to the disk rotor 2.
Performs a braking action by sliding on the side surface of.

The first caliper half 3 and the second caliper half 4 are provided on the outer sides of the pistons 8 and 8 in the disk circumferential direction.
A pair of braking torque receiving surfaces 3b, 3b, 4b, 4b for receiving the braking torque of the friction pads 13, 13 during the braking operation are respectively formed.

The braking torque receiving surface 3 of the first caliper half 3
The vehicle body mounting bolt insertion holes 3c, 3c for mounting the opposed piston type caliper 1 to the vehicle body fixing portion 15 are formed through the vehicle body mounting bolts 3c, 3c, respectively. Mounting bolts 16, 1
6 is inserted.

The vehicle body mounting bolt 16 has a female screw hole 16b formed in a quadrilateral disk outer peripheral head 16a and a disk outer peripheral head formed in a flat portion 3d formed in the first caliper half 3 on the disk outer peripheral side. The female screw hole 16b is positioned so that the female screw hole 16b is oriented in the disk axial direction by contacting one side surface of the disk 16a, and the shaft portion 16c is inserted into the vehicle body mounting bolt insertion hole 3c.
And a nut 17 is screwed into a male screw portion 16d at the end of the vehicle body fixing portion 15 which protrudes toward the inner peripheral side of the disc, and is inserted into a vehicle body mounting bolt insertion hole 15a formed in the vehicle body fixing portion 15. The mold caliper 1 is attached to the vehicle body fixing portion 15.

The connecting bolts 5, 5, 6, 6, 7, 7
From the outside of the second caliper half 4
And the first and second caliper halves 3, and the connection bolts 5, 5, 6, 6 on the outer side in the disk circumferential direction screw the male screw portion at the tip to the female screw portion of the first caliper half 3 to receive the braking torque. The connection bolts 7, 7 on the sides 3b, 3b, 4b, 4b have male screw portions 7a, 7a at their ends screwed into female screw holes 16b of the vehicle body mounting bolt 16, respectively.

By connecting the connecting bolts 7, 7 and the vehicle body fixing bolts 16, 16 in an L-shape, the rigidity of the first caliper half 3 is transmitted to the second caliper half 4. As a result, the displacement of the first caliper half 3 and the second caliper half 4 in the disk rotation direction due to the braking torque is reduced, and the load on the connecting bolts 7 is distributed to the vehicle body mounting bolts 16. The frictional pads 13, 13 due to deformation of the first caliper half 3 on the vehicle body mounting side can be prevented from being unevenly worn, squeaked, squeezed, etc., and the braking efficiency can be improved.

[0015]

As described above, the split caliper of the disc brake for a vehicle according to the present invention has a female screw hole in the axial direction of the disc formed on the outer peripheral side of the disc of the vehicle body mounting bolt for mounting one of the caliper halves to the vehicle body fixing portion. Is formed, and the male screw portion at the tip of the connecting bolt for connecting the other caliper half to one caliper half is screwed into the female screw hole, so that the connecting bolt and the vehicle body mounting bolt are connected in an L-shape, Since the rigidity of the mounting caliper half is transmitted to the other caliper half, the displacement of the caliper halves in the disk rotation direction due to the braking torque is reduced, and the load on the connecting bolt is distributed to the vehicle body mounting bolt. In addition, it is possible to reduce uneven wear, squeal, squeak and the like of the friction pad due to deformation of the caliper half on the vehicle body mounting side, and improve braking efficiency.

[Brief description of the drawings]

FIG. 1 is a front view of an opposed piston caliper showing an embodiment of the present invention.

FIG. 2 is a partial cross-sectional plan view of an opposed piston caliper.

FIG. 3 is a sectional view taken along the line III-III of FIG. 1;

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Opposed piston type caliper, 2 ... Disk rotor, 3
... First caliper half, 3b ... Brake torque receiving surface of first caliper half 3, 4 ... Second caliper half, 4b ... Brake torque receiving surface of second caliper half 4, 5, 6, 7 ... Connection Bolt, 7a: Male thread of connecting bolt 7, 8: Piston, 1
Reference numeral 3 denotes a friction pad, 15 denotes a vehicle body fixing portion, 16 denotes a vehicle body mounting bolt, 16a: a disk outer peripheral side head of the vehicle body mounting bolt 16, 16b: a female screw hole of the vehicle body mounting bolt 16.

Claims (1)

[Claims] 1. A disk rotor arranged on both sides of a disk rotor.
The two caliper halves are connected by a plurality of connecting bolts on the outer peripheral side of the disk, and one caliper half is attached to the vehicle body fixing portion by a plurality of vehicle mounting bolts respectively arranged from the outer peripheral side of the disk toward the inner peripheral side. In the split caliper for a vehicle disk brake, a female screw hole in a disk axial direction is formed in a disk outer peripheral side portion of the vehicle body mounting bolt, and a male screw portion at a tip of the connection bolt is screwed into the female screw hole. Divided caliper for disc brakes for vehicles.