JPH0129290Y2 - - Google Patents

Description

[Detailed explanation of the idea] This invention relates to disc brakes.

A pin slide type disc brake is known as an example of a conventional disc brake.
This disc brake consists of a carrier that is attached to a single non-rotating part (not shown) on one side of the disc, a cylinder part that accommodates a piston that straddles the outer periphery of the disc and faces each other on both sides of the disc via an inner pad and an outer pad, and an outer pawl. A caliper having a caliper is slidably provided on the carrier via a pair of guide pins that are oriented in the axial direction of the disk, spaced apart in the circumferential direction of the disk, and attached to both arms of the caliper, Pressure oil from the master cylinder flows into the cylinder part through a hose connected to this cylinder part, so that the piston presses the inner pad against one side of the disc, and the reaction force generated at this time causes the outer pawl to push the outer pad against the other side of the disc. It is pressed against the side surface and thereby brakes the rotating disk.

However, in such conventional disc brakes, the hose for supplying pressure oil to the cylinder part is attached to the bottom of the cylinder part facing in the axial direction of the cylinder part due to the installation space. Some guide pins are attached to the side of the cylinder in a direction perpendicular to the axial direction of the cylinder. The pads are replaced by rotating the caliper, and in the latter case,
In this way, it is not possible to rotate the caliper and replace the pads, so the pads are replaced after removing the pair of guide pins and removing the caliper from the carrier. This is because the hose becomes an obstacle and the caliper cannot be rotated as described above, but in the case where the hose is attached to the bottom of the cylinder, the caliper cannot be rotated as described above. Due to this habit, if a worker forcefully rotates the caliper in a machine where the hose is attached to the side of the cylinder, excessive force will be applied to the hose, which may cause damage to the hose. It was hot.

This idea was made in view of the above circumstances,
The outer pad is provided with a protrusion that protrudes from the back surface of the outer pad in the axial direction of the disk, and when one of the pair of guide pins is removed and the caliper is rotated about the other, the outer pawl of the caliper will touch the protrusion. To provide a disc brake capable of preventing damage to a hose when replacing pads by abutting the pads and preventing rotation of the caliper.

An embodiment of this invention will be described below with reference to FIGS. 1 to 3. Reference numeral 1 in FIG. 1 denotes a carrier, and this carrier 1 is fixed to a non-rotating portion of the vehicle body on one side of a disk 2 which rotates together with the wheels of the vehicle. An inner pad 3 and an outer pad 4 disposed on both sides of the disk 2 are slidably supported on the carrier 1. A shim 5 is attached to the outer pad 4, which is overlapped with the backing metal, and the hole 5a is fitted into the engaging portion 6. The carrier 1 is provided with a pair of guide pins 7, 7 arranged at intervals in the circumferential direction of the disk 2 and slidably inserted in the axial direction of the disk 2. A caliper 8 is attached to the pair of guide pins 7, 7 by fitting the tips of its arms 8a, 8a, and the caliper 8 is slidably supported by the carrier 1 via the guide pins 7, 7. ing.

The caliper 8 straddles the outer circumference of the disk 2 and has inner pads 3 and outer pads 4 on both sides of the disk 2.
It has a cylinder portion 9 and an outer claw 10 that face each other with a shim 5 interposed therebetween. A piston 11 is accommodated in the cylinder portion 9 so as to be slidable in the axial direction of the disk 2. A hose connector 12 communicating with the inside of the cylinder part 9 is attached to the bottom side surface of the cylinder part 9 at right angles to the axial direction of the cylinder part 9. A hose 13 attached to a master cylinder (not shown) is connected to the hose connector 12, and by flowing pressure oil from the master cylinder into the cylinder portion 9 through the hose 13, the piston 11 is moved to the inner pad 3. is pressed against one side of the disk 2, and the reaction force generated at this time causes the outer pawl 10 of the caliper 8 to press the outer pad 4 against the other side of the disk 2 via the shim 5, thereby braking the rotating disk 2. being done.

Further, the shim 5 has protrusions 14, 14 that protrude by cutting and raising two spaced apart parts of the shim 5, as shown in FIGS. 2 and 3. These protrusions 14, 14 protrude from the back surface of the outer pad 4 in the axial direction of the disk 2 and toward the side of the outer pad 4 opposite to the disk 2 side. Further, these protrusions 14, 14 are located at positions that avoid the pressing part of the outer claw 10 when the caliper 8 is supported by the pair of guide pins 7, 7, and when the caliper 8 removes one guide pin 7 and guides the other. Outer claw 1 when rotated around pin 7
It is formed so as to be located on the rotation locus of 0. That is, the protrusions 14, 14 are connected to one guide pin 7.
When removing the outer pawl 1 and trying to rotate the caliper 8 around the other guide pin 7, the outer pawl 1
0 is formed at a position where it comes into contact with the protrusion 14 and prevents the caliper 8 from rotating.

Therefore, even if an attempt is made to rotate the caliper 8 about the other guide pin 7 in order to replace the pad as described above, the outer pawl 10 will come into contact with the protrusion 14 and the rotation of the caliper 8 will be blocked. Therefore, no excessive force is applied to the hose 13, and this hose 13
damage can be prevented.

To replace the pad, remove the pair of guide pins 7, 7 from the caliper 8, pull up the caliper 8 from the carrier 1, remove it, and replace it. Therefore, this hose 13 will not be damaged.

In the above embodiment, the shim 5 has the protrusion 1.
4 and 14 are formed, but the present invention is not limited thereto. As shown in FIGS. 4 and 5, protrusions 16, 16 may be provided on the back metal 15 of the outer pad 4, and these protrusions 16, 16 may be formed on the shim 5. holes 17, 17
The protrusions 16, 16 may protrude from the shim 5 by inserting the protrusions 16, 16 through the shim 5.

As explained above, according to this invention, the outer pad is provided with a protrusion that protrudes from the back surface of the outer pad in the axial direction of the disk, and one of the pair of guide pins is removed and the caliper is rotated around the other one as the rotation center. When the pad is replaced, the outer claw of the caliper comes into contact with the protrusion, preventing the caliper from rotating. Therefore, even if the operator tries to forcefully rotate the caliper when replacing the pad, the caliper will not rotate. Rotation is prevented, no excessive force is applied to the hose connected to the cylinder portion of the caliper, and damage to the hose can be prevented.

[Brief explanation of the drawing]

Fig. 1 is a plan view showing one embodiment of this invention, Fig. 2 is a front view thereof, Fig. 3 is an enlarged cross-sectional view of the shim along the - line in Fig. 2, and Fig. 4 is another embodiment of this invention. FIG. 5 is a front view of the main part showing the embodiment, and a partial cross-sectional view taken along the - line in FIG. 4. 1...Carrier, 2...Disk, 3...Inner pad, 4...Outer pad, 5...Shim,
7... Guide pin, 8... Caliper, 9... Cylinder section, 10... Outer claw, 11... Piston,
14, 16...Protrusion.

Claims (1)

[Claims for Utility Model Registration] (1) A caliper that straddles the outer periphery of the disk and has an outer pawl and a cylinder portion in which opposing pistons are housed on both sides of the disk via an inner pad and an outer pad, a disc brake that is slidably supported and guided in the axial direction of the disc with respect to a carrier fixed to a non-rotating part of the vehicle body on one side of the disc by a pair of guide pins spaced apart from each other; In the above, the outer pad pressed against the disk by the outer claw of the caliper has a protrusion projecting from the back surface of the outer pad in the axial direction of the disk, and the protrusion has a protrusion that allows the caliper to be supported by the pair of guide pins. The caliper is provided at a position that avoids the pressing portion of the outer claw in the case where the caliper is rotated about one of the guide pins as a rotational center of the outer claw. disc brake. (2) The disc brake according to claim 1, wherein the projection is protruded from a shim provided between the outer pawl and the outer pad. (3) The disc brake according to claim 1, wherein the projection is provided on the outer pad itself.