JPH09133166A - Opposed piston type disc brake - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide such structure as to assemble a brake pad and a pad clip for connecting the brake pad, to a caliper without needing a fastener. SOLUTION: A Caliper 10 of a disc brake has an inner body 12 and an outer body jointed to the inner body 12, and each body is equipped with a piston. A torque plate 150 is inserted in an opening part 40, mounted with a brake pad, of the caliper, and the torque plate 150 is fixed by fitting an engaging part 152 into a recessed part 22 of the caliper. The brake pad 110 has a back metal ill and a friction plate 112, and a cutout part 114 is formed at the back metal ill. A pad clip 130 has bent parts 132 and is elastically fitted to the opposed brake pad 110 to constitute a subassembly 100. This subassembly 100 is inserted in the opening part 40, and a claw part of the pad clip 130 is inserted in a lateral groove 154 of the torque plate 150 to complete assembly.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of an opposed piston type disc brake mounted on a vehicle such as an automobile.

[0002]

2. Description of the Related Art An opposed piston type disc brake for a vehicle is equipped with a brake pad facing a caliper arranged with a rotor rotating together with wheels, and the brake pad is arranged in a caliper body. The piston presses against the rotor to generate braking force. This type of opposed piston type disc brake requires a mechanism for slidably supporting the brake pad with respect to the caliper. Japanese Utility Model Laid-Open No. 22828/1993 discloses the structure of a hanger pin for suspending a brake pad in a disc brake.

[0003]

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention The device disclosed in the above publication has a structure in which a through hole is provided in the back metal of the brake pad and the caliper body, and a pin is inserted into this hole to assemble the brake pad to the caliper body. Has become. In this assembly, it is necessary to position the brake pad hole in the hole of the caliper body and insert the pad holding pin, which requires man-hours for processing the hole and assembling the pin.

Further, when the brake is actuated, one end portion of the brake pad receives a force in a direction of floating from the caliper due to a frictional force with the rotor. In order to suppress this force, it is necessary to install a leaf spring or the like to prevent this floating. The present invention provides an opposed piston type disc brake that does not require drilling and is easy to assemble.

[0005]

An opposed piston type disc brake of the present invention is a caliper having an opening for straddling a rotor and for mounting a brake pad, and a piston arranged so as to face each other in the caliper. And a pair of brake pads having a friction plate and a back metal holding the friction plate, a torque plate disposed between the brake pad and the caliper for transmitting torque applied to the brake pad to the caliper, and a pair of brakes. A pad clip having a bent portion elastically mounted in a notch formed in a back metal of the pad and a claw portion inserted into a lateral groove formed in the torque plate.

A torque plate is mounted in the caliper, and a sub-assembly of the brake pad, which is constructed by previously connecting a pair of brake pads with a pad clip, is inserted into the opening of the caliper, and the claw portion of the pad clip is inserted into the torque plate. The sub-assembly is assembled to the caliper by inserting it into the lateral groove. The back metal of the brake pad has a shoulder, and this shoulder is brought into contact with the upper surface of the caliper via the torque plate.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a perspective view showing the overall structure of an opposed piston type disc brake according to an embodiment of the present invention,
FIG. 2 is a perspective view showing a state in which one of the two-divided caliper bodies is removed, and FIG. 3 is a torque for transmitting a brake pad, a pad clip holding the pad, and a brake torque applied to the brake pad to the caliper body side. FIG. 6 is a perspective view of a plate subassembly.

In an opposed piston type disc brake generally designated by reference numeral 1, a caliper 10 and a subassembly 100 of a brake pad mounted in an opening 40 formed in a central portion of the caliper 10 are connected to the subassembly 100. Cylinder part 30 for accommodating the torque plate 150 and the piston arranged to face the inside of the caliper 10.
Having.

The caliper 10 has a structure in which an inner body 12 and an outer body 14 are divided into two parts.
They are connected together by four bolts inserted in 0. An arm 16 having a nut hole 18 is provided on the inner caliper 12 side, and is fixed to the fixed side of the vehicle by a bolt via a nut inserted into the nut hole 18. The opening 40 for mounting the brake pad subassembly formed in the central portion of the caliper 10 has a substantially rectangular planar shape.
The upper surface 42 of 0 is formed as a flat surface.

The brake pad subassembly 100 mounted in the opening of the caliper 10 is provided with two opposed brake pads 110 and a pad clip 130 for connecting and holding the two brake pads, and is attached to the opening. Is connected to the torque plate 150.

FIG. 3 is an overall perspective view showing a state where the brake pad sub-assembly is assembled to the torque plate,
FIG. 4 is a perspective view showing one brake pad removed,
FIG. 5 is a perspective view showing one torque plate removed. The brake pad 110 that constitutes the brake pad sub-assembly 100 is composed of a friction plate 112 and a back metal 111 that holds the friction plate.
It has a notch 114 with which the pad clip engages. The notch 114 has a so-called dovetail shape in which the width dimension of the depth is wider than the width dimension of the inlet.
Then, shoulders 116 are formed on both sides of the back metal 111.

The pad clip 130 is formed by bending a plate-shaped spring steel plate. The bending portion 132 is elastically attached to the notch 114 of the back metal 111 of the brake pad formed on both sides of the pad clip 130. It has a stepped portion 134 extending parallel to the brake pad 110. As shown in FIG. 5, a claw portion 135 that engages with the torque plate is formed at the tip of the stepped portion 134. The torque plate 150 is
It is made of a gate-shaped plate having a space 151 through which the rotor passes, and has a lateral groove 154 near the upper end. This lateral groove 15
4, the claw portion 135 of the pad clip 130 is inserted, and the pad clip 130 is connected to the torque plate 150. The upper ends on both sides of the lateral groove 154 of the torque plate 150 are bent outward to form a joint 156 on which the shoulder 116 of the backing plate 110 is placed. At both sides of the space 151 for passing the rotor of the torque plate 150, the main body of the torque plate 150 is bent outward,
A joint portion 152 to the caliper is formed.

Next, the means for assembling the disc brake of the present invention will be described. First, the torque plate 150 is inserted into both sides of the opening 40 of the caliper 10 and the joint portion 152 is fitted into the recess 22 formed in the caliper, whereby the torque plate 150 is positioned in the opening 40 of the caliper 10. The joint 156 of the torque plate 150 is abutted on the upper surface 42 of the caliper 10.

Next, the brake pad sub-assembly 100, which is constructed by previously connecting two brake pads 110 with the pad clip 130, is inserted into the opening 40 from above the opening 40. The vertical position of the sub-assembly 100 is determined so that the shoulder 116 of the back metal 111 of the brake pad 110 is placed on the joint 156 of the torque plate 150.

Finally, the claws 135 on both sides of the pad clip 130 are inserted into the lateral grooves 154 of the torque plate 150, and the assembly of the subassembly 100 is completed.

[0016]

As described above, according to the present invention, in the opposed piston type disc brake, a subassembly constituted by assembling two opposed brake pads to a pad clip made of a plate material is prepared. The disc brake is assembled by inserting the sub-assembly into the opening of the caliper and connecting the sub-assembly to the torque plate previously mounted in the opening. Since the brake pad and the pad clip are connected by press-fitting the bent portion of the pad clip into the notch formed in the back metal of the brake pad, no engagement member is required.

To connect the brake pad sub-assembly to the torque plate mounted on the caliper,
Assembly is completed simply by inserting the claws of the pad clip into the lateral grooves of the torque plate. Therefore, no engaging member is required. By forming the positional relationship between the position of the shoulder portion provided on the back metal and joined to the torque plate and the pawl portion provided on the pad clip and inserted into the lateral groove of the torque plate so that the spring force acts when the assembly is completed. It is possible to obtain the opposed-piston type disc brake which prevents backlash and is easy to assemble.

[Brief description of the drawings]

FIG. 1 is a perspective view showing the overall configuration of an opposed piston type disc brake of the present invention.

FIG. 2 is a perspective view showing one of the opposed piston type disc brakes of the present invention with one of the caliper bodies removed.

FIG. 3 is a perspective view showing an assembled state of a brake pad, a pad clip sub-assembly, and a torque plate.

FIG. 4 is a perspective view showing the brake pad and one of the pad clip sub-assemblies with the brake pad removed.

FIG. 5 is a perspective view showing the brake pad and one of the sub-assemblies of the pad clip with one torque plate removed.

[Explanation of symbols]

 1 Opposed Piston Disc Brake 10 Caliper 12 Inner Body 14 Outer Body 40 Caliper Opening 42 Caliper Upper Surface 100 Brake Pad Subassembly 110 Brake Pad 111 Back Metal 112 Friction Plate 114 Notch 116 Shoulder 130 Pad Clip 132 Bend 135 Claw 150 Torque plate 154 Lateral groove

Claims (2)

[Claims] 1. A caliper having an opening for straddling a rotor and for mounting a brake pad, a piston facing each other in the caliper, and a friction plate and a back metal holding the friction plate. A pair of brake pads, a torque plate disposed between the brake pad and the caliper for transmitting torque applied to the brake pad to the caliper, and 1
Opposed piston type disc brake comprising a bent portion elastically mounted in a notch formed in the back metal of the pair of brake pads and a pad clip having a claw portion inserted into a lateral groove formed in the torque plate. . 2. A torque plate having a bent portion that abuts an upper surface of the opening of the caliper, and a brake pad backing having a shoulder portion that abuts an upper surface of the bent portion of the torque plate. Opposed piston type disc brake.