JPH1076946A - Disc brake for rolling stock - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate pull-out of a brake pad to below by a method wherein by removing one of suspension metal fittings, a support washer is brought into suspension down. SOLUTION: A disc rotor 1 is nipped from both sides through a brake pad 3 attached to a brake caliper 3. A brake pad is formed such that a lining is attached to a back plate. The back plate is fitted in a dovetail groove formed in a brake caliper 2 and support washers 20 positioned at the two ends thereof to block movement of the brake pad 3 is fastened against the brake caliper through a bolt 21. Simultaneously, the support washer 20 positioned below the dovetail is supported at the brake caliper 2 through suspension metal fittings 23 arranged on both sides. By removing one of the suspension metal fittings 23, the brake pad 3 is exchanged without the support washer 20 suspended to one side below the dovetail.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disk brake for a railway vehicle which facilitates replacement of a brake lining.

[0002]

2. Description of the Related Art Generally, in a disk brake for a railway vehicle, a brake caliper sandwiches a disk rotor to apply braking. The brake pad is constructed by attaching a lining to the back plate so as to press against the disk rotor.

Since the lining of the brake pad wears with braking, when the amount of wear reaches a certain level, the brake pad is replaced with a new one. To replace the brake pad, slide the back plate that fits into the dovetail groove formed on the brake caliper, pull it out, and replace it with a new one.

[0004]

The brake pad is normally held by receiving washers provided at both ends of the dovetail groove so that the back plate does not separate from the dovetail groove. When replacing the brake pad, loosen the bolt and remove the washer and pull out the back plate along the dovetail groove.However, in order to secure workability when bolting the washer again after replacement, the lower side of the dovetail groove The washer located at the position is suspended from the brake caliper by a hook so that the washer does not drop even if the bolt is removed.

[0005] However, the hook rotates to the opposite side of the disk rotor to move the washer from just below the dovetail groove, thereby allowing the brake pad to be pulled out below. If there is not enough space to rotate (tilt), the washer interferes with the brake pad, and it cannot be removed properly, resulting in poor workability when replacing the brake pad.

The present invention solves such a problem.
When the brake pad is replaced, the washer is made to drop downward with one end serving as a fulcrum so that the brake pad can be easily removed downward.

[0007]

According to the present invention, there is provided a disk brake for holding a disk rotor from both sides via brake calipers, wherein a brake pad is attached to a back plate and a lining for pressing the disk rotor against the disk rotor is provided. It fits freely into the dovetail groove provided on the brake caliper,
Fastening washers, which are located at both ends of the slide and prevent the movement of the brake pad, to the brake caliper via bolts,
At the same time, the washer located below the dovetail groove is suspended and supported on the brake caliper via suspending fittings provided on both sides, and by removing one suspending fitting, the brake washer is dropped on one side of the dovetail groove. Can be exchanged.

In another aspect of the present invention, a hinge portion is formed on the suspension fitting so as to vertically hang the receiving washer.

[0009]

[Function and effect] When the amount of lining wear reaches a certain limit, replace the brake pad with a new one. At this time, remove one hanging bracket of the washer located below the dovetail groove,
Hang the washer on one side of the dovetail groove with the remaining hanging hardware.
In this state, pull out the brake pad along the dovetail groove,
Replace with a new one. Since there is always a space below the dovetail groove for removing the brake pad, good workability is always ensured even if no special space is provided for suspending the washer downward.

Since the hinge is provided on the hanging metal, the hinge extends and becomes vertical when the receiving washer is hung, so that interference with the brake pad can be reliably avoided.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to FIGS.

1 and 2, reference numeral 1 denotes a disk rotor provided on a part of a wheel. Brake pads 3 provided on a brake caliper 2 are disposed on both sides of the disk rotor 1. One brake pad 3 is pressed by a hydraulic cylinder built in the brake caliper 2, and holds the disk rotor 1 with the other brake pad 3 during braking.

The brake caliper 2 is axially slidably mounted and supported on a vehicle body support frame 7 fixed to the vehicle body by a pair of upper and lower support pins 6 extending in the rotation axis direction of the disk rotor 1. Accordingly, the brake caliper 2 is floatingly supported by the vehicle body support frame 7.

The brake pad 3 is a brake caliper 2
Is slidably fitted and held through the dovetail groove 10 with respect to the forked portion 4. The brake pad 3 is composed of a highly rigid back plate 11 and a lining 12 attached to the back plate 11.
Is provided with a dovetail groove plate portion 13 which fits into the groove.

At both ends of the dovetail groove 10 in the groove direction, receiving washers 20 for preventing the brake pad 3 from slipping out are provided. The receiving washers 20 are fixed to both end surfaces of the fork portion 4 by a pair of bolts 21, respectively.

Of the two washers 20, for the lower washers 20, suspenders 23 are provided on both sides of the set of washers 20 so that the washers 20 do not drop when the bolt 21 is removed. A long hole 24 with a stupid hole is formed in the hanging metal fitting 23, a pin 25 fixed to the fork portion 4 is inserted into the long hole 24, and a part of the hanging metal fitting 23 has a hinge. Portion 26 is provided, and when one of the hanging members 23 is removed, the other hanging member 2
3 allows the washer 20 to be suspended vertically.

The operation will be described next.

The brake pad 3 supported by the caliper body 4 holds the disk rotor 1 from both sides by the operation of a hydraulic cylinder (not shown) to exert a braking action. The lining 12 of the brake pad 3 is worn by braking,
When the amount of wear reaches a certain limit, the brake pad 3 is replaced with a new one.

The replacement of the brake pad 3 on the side opposite to the hydraulic cylinder is performed as follows. Receiving washers 20 at both ends of dovetail groove 10 into which back plate 11 of brake pad 3 fits
Among them, loosen and remove the bolt 21 of the lower washer 20,
Further, the pin 25 is removed from the elongated hole 24 of one of the hanging members 23. As a result, the washer 20 is connected to the other suspending bracket 23.
Hangs on the fulcrum.

At this time, the hinge 26 of the hanging member 23 is straightened, and the receiving washer 20 hangs substantially vertically on one side of the dovetail groove 10 to completely open the lower part of the dovetail groove 10 in the groove direction. Thereby, the back plate 1 of the brake pad 3
1 can be slid along the dovetail groove 10 to pull out the brake pad 3 downward.

After the worn brake pad 3 is removed, a new brake pad 3 is inserted along the dovetail groove 10 in the same manner, and the catch washer 20 is returned in a state where the brake pad 3 is completely inserted. Long hole 24
After that, the brake pad 3 is fixed by tightening the bolt 21.

When the brake pad 3 is replaced in this manner, the washer 20 is hung on one side of the dovetail groove 10.
A space for extracting the washer is required, so that a space for hanging the washer 20 in this direction is always ensured. For this reason, the brake pad 3 can be pulled out without interfering with the washer 20 without providing a space for allowing the washer 20 to escape, and good workability for replacing the brake pad 3 is ensured. Is done.

[Brief description of the drawings]

FIG. 1 is a front view showing an embodiment of the present invention.

FIG. 2 is a plan view of the same.

FIG. 3 is an enlarged view showing a main part including a washer.

FIG. 4 is an enlarged view showing the operation state of the same.

FIG. 5 is a side view of the same.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Disc rotor 3 Brake pad 10 Dovetail 11 Back plate 12 Lining 20 Washer 21 Bolt 23 Suspension fitting 26 Hinge part

Claims (2)

[Claims] 1. A disk brake for sandwiching a disk rotor from both sides via brake calipers, wherein a brake pad is provided on a back plate with a lining for pressing against the disk rotor. Locking the washers, which are fitted at both ends of the sliding caliper and prevent the movement of the brake pad, are fastened to the brake caliper via bolts, and at the same time, the washers located below the dovetail groove are on both sides. A railway characterized by being suspended and supported on a brake caliper via a provided hanging bracket, and by removing one of the hanging brackets, a brake pad can be replaced in a state where a washer is hung on one side of a dovetail groove. Disc brakes for vehicles. 2. The disc brake for a railway vehicle according to claim 1, wherein a hinge portion is formed on the suspension fitting so as to vertically hang a washer.