JPH0144812Y2 - - Google Patents

Description

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

For example, in a conventional disc brake, a pair of guide shafts (slide pins) are provided on a carrier provided in a non-rotating part of a vehicle body, and one end thereof extends in the direction away from the disc in the axial direction of the disc, and the other end extends in a direction away from the disc. It is known to extend so as to straddle the disk and to be fixed at a distance in the circumferential direction of the disk, with a caliper and an outer pad slidably attached to these guide shafts.
This disc brake has a caliper in which an inner leg and an outer leg that face each other on both sides of the disc are connected via a bridge part via an inner pad and an outer pad. The outer pad is brought into pressure contact with one side surface, and the reaction force generated at this time causes the outer pad to come into pressure contact with the other side surface of the disk at the outer leg, thereby braking the rotating disk.

By the way, in such a disc brake, the installation of the outer pad and inner pad,
When removing the caliper, move the slide pin fitting hole of the caliper toward the slide pin mounting part of the carrier by a distance longer than the thickness of the outer pad's backing metal, and then connect the outer leg of the caliper with the end of the guide shaft. Insert and remove the outer pad between the
When the outer pad is taken out, the inner pad and out pad are attached and removed by taking the inner pad in and out.

However, with such conventional disc brakes, the caliper must be moved more than the amount normally required to attach and remove the outer pad, so the slide pin fitting hole has to be longer than the normally required length. This length increases the external size of the disc brake, increases its weight, and has drawbacks such as high costs and time-consuming replacement of pads.

This idea was made in view of the above circumstances,
The outer pad is movably supported by a single guide shaft member fixed to the carrier, the caliper is movably supported by a guide shaft fixed to the carrier, and the support provided on the outer leg of the caliper and the outer pad is provided. To provide a disc brake which can be made smaller and lighter by movably supporting an outer pad on an outer leg part by a mechanism, which is inexpensive and allows easy replacement of pads.

An embodiment of this invention will be described below based on the drawings. Reference numeral 1 in FIGS. 1 and 2 is a disk, and a pair of pads, that is, an inner pad 2 and an outer pad 3, are arranged with this disk 1 in between. A substantially U-shaped plate-shaped carrier 4 is provided on one side of the disk 1 and is attached to a non-rotating portion of a vehicle (not shown). The carrier 4 is arranged to extend substantially in the radial direction of the disk 1, and the carrier 4 is formed with guide walls 5, 6 for guiding the movement of the inner pad 2, as shown in FIG. The guide wall portion 6 has a concave shape.

A guide shaft member 8 is fixed to one end of the carrier 4 (upper left in FIG. 1), and a guide shaft 9 is fixed to the other end.
is fixed. The guide shaft member 8 is provided to pass through the carrier 4, and its central portion is fixed to the carrier 4. And 1 set up like this
One side of the book guide shaft member 8 extends across the outer periphery of the disc 1 to form a pad support portion 8a, and the other side extends in the direction opposite to the disc 1. The guide shaft 9 extends only in the direction opposite to the disk 1. A caliper 10 is attached to the guide shaft member 8 and the guide shaft 9 through their guide shaft holes 11 and 1.
2 are slidably fitted and attached.

In the caliper 10, an inner leg portion 13 and an outer leg portion 14, which are opposed to each other on both sides of the disk 1 via an inner pad 2 and an outer pad 3, are connected by a bridge portion 15 that straddles the disk 1, and a piston 16 is connected to the inner leg portion 13. It is housed so as to be slidable in the axial direction of the first part. Calipa 1
The outer leg portion 14 of No. 0 has a protruding portion 17,
A hole 18 is formed in this protrusion 17, and this hole 1
A shaft 19 is inserted into the shaft 8 . The shaft 19 is fixed to the protrusion 17 by a retaining ring 20.

As shown in FIG. 4, the inner pad 2 has its lower portion loosely fitted into the guide wall 6 of the carrier 4, and is movable in the axial direction of the disk 1. Further, as shown in FIG. 6, the outer pad 3 has ears 21 and 22 at the upper part, and holes 23 and 24 are formed in the ears 21 and 22, respectively. Hole 2
3 and 24 have the same inner diameter, and are approximately the same diameter as the outer diameter of the pad support portion 8a of the guide shaft member 8. The outer diameter of the shaft 19 is larger than the inner diameter of the holes 23 and 24. The outer pad 3 has the hole 23 fitted into the pad support portion 8a of the guide shaft member 8, and the hole 24
is fitted onto a shaft 19 and supported so as to be movable in the axial direction of the disk 1. Note that 25 and 26 are boots, 27 and 28 are seal members, and 29 is a pad spring. In addition, the hole 24 of the outer pad 3
and the shaft 19 constitute a support mechanism.

As a result, the piston 16 receives oil pressure from a master cylinder (not shown) and moves as indicated by the arrow in FIG.
When the caliper 10 moves in the direction of arrow B in the figure, the inner pad 2 comes into pressure contact with one side of the disk 1, and the reaction force generated at this time causes the caliper 10 to move in the direction of arrow B in the figure, causing the outer pad 3 to come into pressure contact with the other side of the disk 1. , thereby braking the rotating disk 1. Then, when the oil pressure applied to the piston 16 is lowered, the caliper 10 moves in the direction of arrow A in the figure and returns to its original position. When braking the disc 1, brake torque is applied to the guide walls 5, 6 of the carrier 4 and the guide shaft member 8, but since the outer diameter of the shaft 19 is smaller than the inner diameter of the hole 24, the brake torque is applied to the guide walls 5, 6 of the carrier 4 and the guide shaft member 8. Therefore, only the brake torque couple is applied to this shaft 19 without applying it to the caliper 10. Therefore, the strength of the shaft 19 may be relatively small, and since no brake torque is applied to the shaft 19 and the caliper 10, the operation of the caliper 10 is not hindered by the brake torque. If the outer diameter of the shaft 19 is made the same as the outer diameter of the pad support portion 8a of the guide shaft member 8, brake torque may be applied to the shaft 19 during braking, so the strength of the shaft 19 must be increased. Not only will this not occur, but there is a risk that the caliper 10 will slide poorly. Also, the hole 24 of the outer pad 3 is replaced with the hole 23.
If the diameter is larger, disc brakes for two-wheeled vehicles may be installed symmetrically on the vehicle body, so pads with opposite left and right hands are required, and the lack of compatibility makes it difficult to manage spare parts.
This will cause workability and other problems. Therefore, in this embodiment, in order to eliminate this problem, the inner diameters of the holes 23 and 24 are made the same.

When attaching or removing the outer pad 3 and inner pad 2, (1) remove the carrier 4 from the vehicle body, and (2) attach the outer pad 3 to the piston 1 while the disc brake is inactive.
6 side to remove it from the shaft 19, (3) rotate the outer pad 3 around the guide shaft member 8 and remove it from the guide shaft member 8, (4) then remove the inner pad 2.
Remove from Carrier 4. (5) When attaching the inner pad 2 and outer pad 3, follow the steps (1) to (4) in reverse. Therefore, the pads can be easily replaced by simply removing the carrier 4 from the vehicle body, and since the shaft 19 can be made extremely short, the guide shaft holes 11 and 12 of the guide shaft member 8 and the caliper 10 can be easily replaced. It can be made shorter, thereby making it possible to reduce the size and weight.

As explained above, according to this invention, the outer pad is movably supported by one guide shaft member fixed to the carrier, and the caliper is movably supported by the guide shaft fixed to the carrier. Since the outer pad is movably supported on the outer leg by the support mechanism provided on the outer leg and the outer pad, the pad can be easily replaced by simply removing the carrier from the vehicle body, and the guide shaft member, Since the guide shaft hole of the guide shaft caliper, the shaft of the support mechanism, etc. can be shortened, the size and weight can be reduced, and costs can be reduced. In addition, with this invention, the carrier is provided to extend in the radial direction of the disk, and of the two shaft members that movably support the caliper, the guide shaft is configured so that it does not cross the disk. U shape
It can be made into a more linear shape rather than a letter shape. Therefore, since there is no need to make the carrier U-shaped, the carrier can be made smaller and lighter.

Further, this invention uses a combination of a hole and a shaft as the support mechanism, and the outside diameter of the shaft is set smaller than the inside diameter of the hole, so the brake torque that acts on the outer pad does not act on the caliper. Therefore, the operation of the caliper is not hindered by the brake torque, and good operation is always guaranteed. Further, since no brake torque acts on this shaft, the shaft can be made smaller and lighter.

[Brief explanation of the drawing]

Fig. 1 is a front view showing an embodiment of this invention, Fig. 2 is a partially cutaway cross-sectional plan view thereof, Fig. 3 is a vertical cross-sectional view taken along the - line in Fig. 1, and Fig. 4 is the Fig. 3 Fig. 5 is a rear view, Fig. 6 is a sectional view taken along the line
3 is a cross-sectional view taken along the line in FIG. 3, FIG. 5 is a rear view thereof, and FIG. 6 is a cross-sectional view taken along the line - in FIG. 3. 1...disc, 2...inner pad, 3...
... Outer pad, 4 ... Carrier, 5, 6 ... Guide wall section, 8 ... Guide shaft member, 9 ... Guide shaft, 1
0... Caliper, 13... Inner leg, 14...
...Outer leg, 16... Piston, 18, 23...
...Hole, 24...Hole, 19...Axis.

Claims (1)

[Scope of Claim for Utility Model Registration] A disc and an inner pad provided on a non-rotating part of a vehicle so as to extend substantially in the radial direction of the disc on one side of the disc, and movably supporting and guiding an inner pad disposed on one side of the disc. a carrier having a guide wall portion that receives a brake torque; a central portion that is passed through the carrier and is fixed to the carrier; one end extends across the outer periphery of the disk to the other side of the disk; a guide shaft member which movably supports and guides the disposed outer pad, the other end of which extends in a direction away from one side of the disk; , a guide shaft extending away from one side of the disk, an inner leg housing a piston supported movably in the axial direction of the disk by the guide shaft member and the guide shaft on one side of the disk, and an outer leg A caliper is provided facing the other side of the disk, and a support mechanism for supporting the outer pad is provided on an outer leg portion of the caliper and the outer pad, and the support mechanism is configured to support the outer pad and the caliper. It is characterized by comprising a hole formed in at least one side of the outer leg of the holder, and a shaft fitted into the hole, and the outer diameter of the shaft is set smaller than the inner diameter of the hole. disc brake.