JPH0536137U - Disc brakes for vehicles - Google Patents

Abstract

(57) [Summary] [Purpose] To reduce the number of parts of a pin slide type vehicle disc brake having a split caliper body to achieve a lightweight structure. A connecting bolt (7, 7) for connecting the action part side half body (5) of the caliper body (4) and the reaction part side half body (6) to a connecting part (7b) of the action part side half body (5) and the reaction part side half body (6). , Connecting part 7
b and the sliding pin portion 7c extending over the outer circumference of the disc rotor 2 toward the reaction force claw 6a side, respectively, and the sliding pin portions 7c and 7c are respectively formed in the guide holes 3a and 3a formed in the caliper bracket 3. The caliper body 4 is inserted and supported so as to be movable in the axial direction of the disc rotor 2.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention is a disc brake used in various types of traveling vehicles such as motorcycles, and more specifically, it is a split caliper body in which a working portion side half body and a reaction portion side half body are connected by connecting bolts. The present invention relates to a disc brake for a vehicle, which is movably supported in a disc axial direction on a caliper bracket fixed to a vehicle body through sliding pins.

[0002]

[Prior Art]

 The action part side half body having a piston arranged on one side of the disk rotor and the reaction part side half body having reaction force claws arranged on the other side are joined on one side of the disk rotor to form a plurality of pieces. The caliper body connected with the connecting bolts is supported by a caliper bracket fixed to the vehicle body via a sliding pin so as to be movable in the disc axial direction, and the caliper body is moved in the disc axial direction to perform braking action. A vehicle disk brake is disclosed in Japanese Patent Laid-Open No. 58-77928.

[0003]

[Problems to be solved by the device]

 However, the vehicle disc brake disclosed in the above publication requires a plurality of connecting bolts for connecting the action part side half body and the reaction part side half body forming the caliper body, and the caliper body is also required. Since a sliding pin is required to support the caliper bracket, the number of parts is large, which is economically disadvantageous and the weight is increased.

Therefore, an object of the present invention is to provide a vehicle disc brake having a small number of parts and a lightweight structure.

[0005]

[Means for Solving the Problems]

 According to the present invention, the action part side half body having a piston arranged on one side of the disk rotor and the reaction part side half body having reaction force claws arranged on the other side are provided on one side of the disk rotor. A disc brake for a vehicle, in which a caliper body joined by a plurality of connecting bolts and connected by a plurality of connecting bolts is supported by a caliper bracket fixed to the vehicle body through sliding pins so as to be movable in the disc axial direction, At least two of them are connected to the connecting portion between the acting portion side half body and the reaction portion side half body, and the sliding pin portion extending from the connecting portion to the reaction force claw side across the outer circumference of the disk rotor. The sliding pin portion is inserted into a guide hole formed in the caliper bracket.

[0006]

[Action]

 According to this structure, at least two of the connecting bolts serve to connect the working portion and the reaction portion forming the caliper body, and the sliding pin for supporting the caliper body on the caliper bracket so as to be movable in the disc axial direction. Combines work.

[0007]

【Example】

 Embodiments of the present invention will be described below with reference to the drawings.

1 to 4 show a first embodiment of the present invention, in which a disc brake 1 is a disc rotor 2 rotating in a direction of an arrow A, and one side of the disc rotor 2 fixed to a vehicle body. The caliper bracket 3 and the caliper body 4 supported by the caliper bracket 3 so as to be movable in the axial direction of the disc rotor 2.

The caliper body 4 includes a working portion side half body 5 arranged on one side of the disc rotor 2 and a reaction portion side half body 6 having a reaction force pawl 6 a arranged on the other side. It is a split type in which two connecting bolts 7, 7 and two connecting bolts 8, 8 are arranged in the circumferential direction and the radial direction, respectively.

The action portion side half body 5 is cast from a light metal such as aluminum, and has a cylinder hole 5a having a disc rotor 2 side opening at the center thereof and a joint portion 5b with the reaction portion side half body 6 around the cylinder hole 5a. 5b are formed respectively, and a piston 9 is fitted into the cylinder hole 5a so as to be movable in the axial direction of the disc rotor 2 and is held liquid-tight by a piston seal 10 provided around the opening side of the cylinder hole 5a. The bottom wall of the cylinder hole 5a is provided with an inlet port 5c for supplying the boosted hydraulic fluid to the hydraulic chamber 11 defined between the cylinder 9 and the piston 9, and for discharging the air in the hydraulic fluid. And a blue screw 12 are provided.

The reaction portion side half body 6 is cast from cast iron and has a reaction force claw 6 a, a bridge portion 6 b straddling the outer periphery of the disc rotor 2, and a joint portion 6 c with the action portion side half body 5. A piston insertion hole 6d having a diameter larger than that of the cylinder hole 5a is formed in the central portion of the joint portion 6c, and a dust seal 13 is arranged between the peripheral wall of the piston insertion hole 6d and the peripheral wall of the piston 9. There is.

The acting portion side half body 5 and the reaction portion side half body 6 join the joining portions 5 b, 5 b and the joining portion 6 c on the acting portion side half body 5 side arranged on one side of the disc rotor 2, respectively. The connecting bolts 7, 7 screwed to the outer peripheral side of the disk rotor 2 and the connecting bolts 8, 8 screwed to the inner peripheral side of the disk rotor 2 are connected.

The connecting bolts 7, 7 are arranged on the outer peripheral side of the disk rotor 2 on both the left and right sides in the circumferential direction thereof, and each has a head portion 7 a on the side of the action portion side half 5, and the action portion side half body 5 respectively. Connection part 7b which is inserted into the connection part 5b of the reaction part side half body 6 and is screwed to the connection part 6c of the reaction part side half body 6, and a sliding pin extending from the connection part 7b to the reaction force claw 6a side across the outer circumference of the disk rotor 2. The sliding pin portion 7c is inserted into a guide hole 3a formed in the caliper bracket 3 by integrally connecting the portion 7c and the sliding portion 7c.

As a result, the caliper body 4 is supported by the caliper bracket 3 so as to be movable in the disc axial direction, and when the boosted hydraulic fluid is supplied to the hydraulic chamber 11, the piston 9 moves to one side of the disc rotor 2. One of the arranged friction pads 14 is pressed against one side surface of the disc rotor 2, and by this reaction, the caliper body 4 is guided by the sliding pin portions 7c, 7c of the connecting bolts 7, 7 while the action portion side half body 5 is being guided. Direction, the other friction pad 14 arranged on the other side of the disc rotor 2 is pressed against the other side surface of the disc rotor 2 to perform a braking action.

With the above-described structure, the connecting bolts 7, 7 connect the action portion side half body 5 and the reaction portion side half body 6 which form the caliper body 4, and the caliper body 4 is connected to the caliper bracket 4. Also serves as a sliding pin to support 3.

Therefore, the number of parts is small and assembly is easy. Moreover, since the number of parts is small, it is possible to reduce the weight. In particular, like the conventional pin slide type disc brake, the mounting arms for attaching the sliding pins to both sides of the caliper body 4 are projected. Since there is no need to install it, the caliper body can be made lightweight and small as a whole.

It should be noted that in the present embodiment, two half of the action portion side half body 5 and the reaction portion side half body 6 of the caliper body 4 are arranged in the circumferential direction of the disc rotor 2 and the connecting bolts 7, 7 are arranged in the radial direction. Although the description has been given of the case where the connecting bolts 8 and 8 arranged in this arrangement are used for connection, the action part side half body 5 and the reaction part side half body 6 are connected by a plurality of connection bolts, and at least 2 of them are connected. The number and arrangement of the connecting bolts do not matter as long as the connecting bolt of this book includes the connecting portion and the sliding pin portion.

FIG. 5 shows a part of the second embodiment of the present invention, in which the connecting bolt 20 is inserted through the joint portion 5b of the acting portion side half body 5 and the joining portion 6c of the reaction portion side half body 6. The connecting portion 20a that is screwed onto the connecting portion 20a and the sliding pin portion 20b that extends from the connecting portion 20 to the reaction force claw 6a side across the outer periphery of the disk rotor 2 are separately formed. The sliding pin portion 20b is screwed into the sliding pin portion 20b, and the sliding pin portion 20b is connected to the tip of the connecting portion 20a. The sliding pin portion 20b is inserted into the guide hole 3a formed in the caliper bracket 3. .

With this configuration, the caliper body 4 can be detached from the caliper bracket 3 by detaching the connecting portion 20a without removing the sliding pin portion 20b from the guide hole 3a of the caliper bracket 3. Excellent workability when exchanging the friction pad 14.

[0020]

[Effect of the device]

 As described above, according to the present invention, at least two connecting bolts for connecting the action portion side half body and the reaction portion side half body of the caliper body are connected to the action portion side half body and the reaction portion side half body. And the sliding pin that extends from the connecting part to the reaction force claw side across the outer circumference of the disk rotor are connected, so that the number of parts is smaller than that of conventional products, and the parts can be managed and stored. It is easy, and labor is saved even when assembled, which is economically advantageous. In addition, the number of parts can be reduced to reduce the weight, and in particular, mounting arms for mounting the sliding pins on both sides of the caliper body like the conventional pin slide type disc brakes are required. Since there is no need to project it, it is possible to provide a light-weight and compact product as a whole.

[Brief description of drawings]

FIG. 1 is a partially sectional plan view of a disc brake showing a first embodiment of the present invention.

FIG. 2 is a front view of FIG.

FIG. 3 is a sectional view taken along line III-III in FIG.

4 is a partial cross-sectional rear view of FIG.

FIG. 5 is a sectional plan view showing a main part of a second embodiment of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Disc brake, 2 ... Disc rotor, 3 ... Caliper bracket, 3a ... Guide hole, 4 ... Caliper body, 5 ... Working part side half body, 5a ... Cylinder hole, 5b ... Joint part, 6 ... Reaction part side half body , 6a ... Reaction force claw, 6b ... Bridge portion, 6c ... Joining portion, 7 ... Connecting bolt, 7b.
7c ... sliding pin portion, 8 ... connecting bolt, 9 ... piston, 2
0 ... Connection bolt, 20a ... Connection part, 20b ... Sliding pin part

Claims (1)

[Scope of utility model registration request] Claim: What is claimed is: 1. An operating portion side half body having a piston arranged on one side of the disk rotor, and a reaction portion side half body having reaction force claws arranged on the other side. In a vehicle disc brake, a caliper body joined by means of a plurality of connecting bolts and supported by a caliper bracket fixed to a vehicle body through a sliding pin so as to be movable in the disc axial direction. At least two of them are connected to a connecting portion between the acting portion side half body and the reaction portion side half body, and a sliding pin portion extending from the connecting portion to the reaction force claw side across the outer circumference of the disk rotor. Then, the disc brake for a vehicle, wherein the sliding pin portion is inserted into a guide hole formed in the caliper bracket.