JPS6150170B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a support structure for a pad assembly in a two-wheeled vehicle disc brake, particularly a floating type disc brake.

1 and 2 show a conventional floating type disc brake for two-wheeled vehicles.

The disc brake shown in Figure 1 has caliper 1.
It is composed of a cylinder-side pad assembly 2 and a wheel-side pad assembly 3, which are arranged to face each other in the caliper, and a piston 5 housed in the caliper cylinder 4. The cylinder-side pad assembly 2 pressed by the piston 5 is supported by a fixing member 6, and the wheel-side pad assembly 3 is supported by an arm 7 of the caliper.

The disc brake shown in FIG. 2 has the same structure as above, but in this case, the cylinder-side pad assembly 2 is stored and supported in a storage part 8 provided at the open end of the caliper cylinder 4. There is.

In the disc brake shown in FIG. 1 above, each pad assembly 2, 3 has the same thickness, and its support structure does not affect the length of the cylinder 4, but the fixing member 6 is required. There is a certain drawback. This fixing member 6 is a cause of increasing the number of parts of the disc brake, and the support structure of the pad assembly using such a member cannot meet the current demands for resource saving and cost reduction. Can not.

On the other hand, the disc brake shown in FIG. 2 has an advantage in that it does not require the above-mentioned fixing member, but the storage part 8 must be provided in the opening of the cylinder 4 in order to support the pad assembly 2. In addition, even if the pads 2a and 2b wear out, it is necessary to support the cylinder-side pad assembly 2 in its storage portion 8. The thickness must be the same as the thickness of the assembly 3 plus the pad wear allowance. As a result, both pad assemblies 2, 3 have different thicknesses, and the cylinder 4
It also has the disadvantage of being long.

Therefore, the present invention has the advantage of the one shown in FIG. 2 in that the fixing member can be omitted, and the length of the cylinder can be formed to the minimum necessary length, and each pad assembly can be formed with the minimum necessary thickness. The object of the present invention is to provide a support structure for a pad assembly that takes advantage of the advantages of the pad assembly shown in FIG.

In order to solve the above problem, this invention provides a protrusion 18 at the outer end in the disk radial direction of the back plates 12b, 13b of the pair of pad assemblies 12, 13 facing each other on both sides of the disk A, and A pad pin 20 that passes through the carrier public arm 19 that connects the arm 11a on the side and the arm 11b on the cylinder 14 side is inserted into the protrusion 18, and a disk groove is formed on the disk side of the carrier public tube 19 facing the outer peripheral surface of the disk. 16, and disk grooves 1 are formed on both sides of the protrusion 18 of each pad assembly 12, 13 in the disk circumferential direction.
The structure is such that shoulder portions 22 and 23 are provided which come into contact with the bottom surface of 6.

Embodiments of the present invention will be described below based on FIGS. 3 to 5.

The disc brake of this embodiment is a floating type for two-wheeled vehicles, and, like the conventional disc brake, includes a caliper 11, a pad assembly 12 on the cylinder side and a pad assembly 12 on the wheel side disposed oppositely in the caliper. It consists of an assembly 13 and a piston 15 housed in a caliper cylinder 14. The caliper 11 includes an arm 11a on the wheel side, an arm 11b on the cylinder 14 side, and a caliper bridge portion 19 that connects both arms 11a, 11b. The difference from the conventional one is the support structure of each pad assembly 12, 13.

That is, in this case, a disc groove 16 facing the outer peripheral surface of the disc A is provided in the caliper public bridge portion 19 of the caliper 11, and a recess 17 is provided in a part of the disc groove 16 (see FIGS. 4 and 5). ,
Back metal 12b, 1 of each pad assembly 12, 13
The protrusion 18 provided at the upper end of the caliper 3b is inserted into the recess 17, and one pad pin 20 passing through the arms 11a, 11b of the caliper 11 is inserted into the hole 21 provided in the protrusion 18. supports each pad assembly 12,13. Both shoulders 2 of each pad assembly 12, 13
2 and 23 are in contact with the disc groove 16 on both sides of the recess 17.

As shown in FIG. 4, the protrusion 18 may be provided between the shoulders 22 and 23 so that the pad pin 20 passes through the center of the caliper 11 in the axial direction of the disk a. As shown in FIG. 5, the protrusion 18 may be provided to one side, and the pad pin 20 may be provided so as to pass through the caliper 11 at a position offset to one side.

The pad assembly support structure of the present invention is constructed as described above, and the torque during braking is applied to the pad pin 20 and the disc groove 16 of the caliper where the shoulder portions 22, 23 of each pad assembly 12, 13 come into contact.
can be received by. In this case, as shown in FIG. 4, if the protrusion 18 is provided between the shoulders 22 and 23 and the pad pin 20 passes through the center of the caliper 11, the braking torque during forward movement and backward movement It is preferable when these are substantially the same, and when there is a large difference in the braking torque during forward movement and backward movement, it is preferable to provide the protrusion 18 at one side as shown in FIG. FIG. 5 shows a case in which the disk A is biased toward the retraction side during forward movement, which is suitable when the braking torque during forward movement (in the direction of arrow B) is large. Further, the disc groove 16 may be linear as shown, but may also be arcuate.

Since the support structure of the pad assembly according to the present invention is constructed as described above, it has the following effects.

(1) Since each pad assembly is supported by a single pad pin penetrating through the carrier public bridge, there is no need for a special fixing member to support the cylinder side pad assembly. As a result, it is cheaper than those using fixed members,
The number of parts is also reduced.

(2) Since the caliper cylinder does not require a storage part for the pad assembly, the caliper cylinder can be kept to the minimum necessary length.

(3) The thickness of the pad assembly on the cylinder side can be kept to the same thickness as the pad assembly on the wheel side and to the minimum necessary thickness.

(4) The contact part for stopping the rotation around the pad pin also shares the pad groove, which is originally necessary for functionality, so there is no need to increase the required finishing area.
Processing can be done inexpensively.

[Brief explanation of the drawing]

Figures 1 and 2 are sectional views of a conventional disc brake, Figure 3 is a sectional view of the disc brake of this invention, Figure 4 is a longitudinal side view thereof, and Figure 5 is a longitudinal side view of another example. Show the diagram. 11...Caliper, 12...Cylinder side pad assembly, 13...Wheel side pad assembly, 14...Cylinder, 15...Piston, 16
. . . Disc groove, 17 .

Claims (1)

[Claims] 1. Back plates 12b, 13b of a pair of pad assemblies 12, 13 facing each other on both sides of disk A
A protrusion 18 is provided at the outer end in the radial direction of the disk,
A pad pin 20 that passes through the caliper public bridge portion 19 that connects the arm 11a on the wheel side and the arm 11b on the cylinder side of the caliper 11 is inserted into the protruding portion 18, and the disk outer peripheral surface and the disk side of the caliper public portion 19 are inserted. Opposed disk grooves 16 are formed in each pad assembly 12, 13.
A pad assembly support structure for a two-wheeled vehicle disc brake, comprising shoulder parts 22 and 23 that abut against the bottom surface of the disc groove 16 on both sides of the protruding part 18 in the disc circumferential direction. 2. A disc brake for a two-wheeled vehicle according to claim 1, characterized in that the disc groove is provided with a recess, and the protrusion of each pad assembly is inserted into the recess. Padded assembly support structure. 3. The two-wheeled vehicle disc according to claim 1 or 2, wherein the protrusion is provided at the center of the outer end in the radial direction of the disc of each pad assembly back metal. Brake pad assembly support structure.