JPH08226471A - Caliper brake device for rolling stock - Google Patents

Abstract

PURPOSE: To provide a function of forcibly returning a brake block when a brake is released in a caliper brake device for rolling stock. CONSTITUTION: A caliper brake device for rolling stock 1 is provided with a supporting frame 12 formed integral with a main body 10, and fixed to a carrier. Also the arms 20 and 22 of the main body 10 are provided with a cylinder body 30, and energize a brake block 60 toward the rotor of a wheel 5. The upper and lower both end parts of the brake block 60 are supported slidably by an anchor pin 100. A rod 110 which passes the anchor pin 100 is provided. The top end of the rod 110 is brought in contact with a boss part 71 of a pressure plate 70 through a washer 112. Then a spring 120 is provided on the other end part of the rod 110 so as to energize the brake block 60 in return direction.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a caliper brake device mounted on a railway vehicle.

[0002]

2. Description of the Related Art A caliper type disc brake device for generating a braking force by pressing a brake pad mounted on a caliper arranged so as to sandwich a disc against a disc rotating integrally with a wheel or the like, A hydraulic cylinder is arranged on one of the calipers arranged facing each other.
A so-called floating type, which supports the other caliper in a floating state, and an exposed type, which includes a cylinder facing the caliper, have been proposed. The brake pad is pressed against the disc by a hydraulically driven piston when the brake is applied, but when the brake is released, the piston does not have a function of forcibly returning the brake pad to the direction away from the disc.

[0003]

For example, British Patent Specification No. 840392 discloses an opposed type disc brake device of this type having a spring for returning a brake pad. In the vehicle disc brake device, the caliper brake main body can be attached to a so-called unsprung member of the suspension that supports the wheels and the disc, so that the relative positional relationship between the disc and the caliper brake main body does not change.

However, in a caliper brake device for a railroad vehicle, the caliper brake device main body is attached to the dolly of the vehicle, but the brake pad of the caliper brake device is attached to a wheel that is displaced relative to the dolly. It is necessary to brake the rotor. Therefore,
A brake shoe having a brake pad needs a structure in which it is slidably supported by anchor pins and is urged by a cylinder. The present invention provides a brake shoe returning device in a caliper brake device for a railway vehicle of this type.

[0006]

An anchor pin equipped in a caliper brake device for a railway vehicle according to the present invention is attached to a rod penetrating a central portion and an end portion of the rod on the side of a brake shoe to contact the brake shoe. A washer, a spring inserted into a hole formed on the opposite side of the anchor pin from the brake shoe, and a means for connecting the spring penetrating the spring and the spring.

[0007]

When the brake shoe supported by the anchor pin moves to the rotor side of the wheel during braking, the spring provided inside the anchor pin is compressed. When the brake is released, the repulsive force of the spring surely returns the brake shoe.

[0008]

1 is a side view of a caliper brake device for a railway vehicle to which the present invention is applied, and FIG. 2 is a top view thereof. A caliper brake device for a railroad vehicle, which is generally denoted by reference numeral 1, has a caliper brake body 10, and the caliper brake body 10 is attached to a bogie of a railroad vehicle via a mounting portion 12.
The groove 14 provided in the lower portion of the mounting portion 12 is hung on the dolly, and the caliper brake main body 10 is used by using the bolt holes 16.
Fixed to the dolly. Rotors are attached to both sides of the wheel 5, and the caliper brake main body 10 has two arms 20 and 22 that face each other with the wheel 5 interposed therebetween.

A cylinder body 30 is provided in each arm, and a piston is inserted into a cylinder 32 formed in the cylinder body 30. Brake hydraulic pressure is supplied into the cylinder 32 through the hydraulic pressure supply port 27. This type of caliper brake device is referred to as an opposed type caliper brake device because the cylinder pistons are arranged facing each other. Mounting surface 2 on the upper surface of arm 22
An upper anchor block 40 is fixed to the No. 4 via an anchor bolt 42. The upper anchor bolt 40 supports the anchor pin 100, and the anchor pin 100 supports the boss arc-shaped boss portion 72 of the brake shoe 60. The anchor pin 100 mounted by the upper anchor block 40 receives the braking force acting on the brake shoe 60 in the upward direction in FIG. 1.

A lower anchor block 50 is arranged below the arm 22 and is fixed to the arm side by an anchor bolt 52. The anchor pin 100 supported by the lower anchor block 50 receives a downward braking force acting on the brake shoe 60. When the brake is operated, hydraulic pressure is supplied into the cylinders 32 arranged opposite to each other, the piston presses the pressure plate 70 of the brake shoe 60, and the brake pad 80 attached to the pressure plate 70 causes the brake pad 80 of the wheel 5. Tighten the rotor to generate braking force. When the brake is released, the hydraulic pressure in the cylinder 32 is released and the brake shoe 60 is pushed back by the rotor. The cylinder 32 does not have a function of pulling back the brake shoe 60.
When the brake is released, the brake shoe 60 has no gap with the rotor,
When so-called dragging of the brake occurs, it causes inconvenience such as early wear and uneven wear of the brake pad. Therefore, in the brake device of the present invention, the anchor pin that supports the brake shoe is equipped with a brake shoe returning mechanism.

FIG. 3 is an explanatory view showing the sectional structure of the anchor pin portion. The anchor pin 100 has a bolt hole 25 on the mounting surface 24 of the arm of the caliper brake body, and is fixed by an anchor block 40 and an anchor bolt 42. It is fixed by the anchor bolt 42. A ring 130 is fitted on the outer peripheral portion of the anchor pin to regulate the axial position of the anchor pin 100. Anchor pin 100 is a brake shoe 6
0 is brought into contact with the arc-shaped groove 72 of the boss portion 71 having a large width formed at the upper and lower ends of the pressure plate 70,
The brake force acting on the brake shoe 60 is received. The anchor pin 100 is a cylindrical member, and has a small-diameter hole 102 that opens to the brake shoe side and a large-diameter hole 1 that connects to the small-diameter hole 102.
04 and. At the brake shoe side end of the rod 110 inserted through the holes 102 and 104, a swollen portion 111 is formed by caulking, and the disk-shaped washer 11 is formed.
2 is attached. The washer 112 is brought into contact with the side surface of the boss portion 71 of the pressure plate 70.

A coil spring 120 is inserted into the large diameter hole 104 of the anchor pin 100. A threaded portion is formed on the end portion of the rod 110 on the large diameter hole 104 side, and a nut 116 is screwed into the rod 110 via a disc-shaped cup 114. The outer peripheral portion of the cup 114 is brought into contact with the end portion of the spring 120. A cotter pin 118 is inserted into a hole provided in the rod outside the nut 116 to prevent the nut 116 from loosening. When hydraulic pressure is supplied to the cylinder 30 of the caliper brake main body, the pressure plate 70 is guided by the anchor pin 100 and moves in the direction of arrow B, and the brake pad attached to the pressure plate 70 is brought into pressure contact with the rotor. With the movement of the pressure plate 70, the rod 110 moves in the direction of arrow B. Since the anchor pin 100 is fixed to the brake body side, the spring 120 is compressed by the movement of the rod 110.

When the supply of hydraulic pressure to the cylinder 30 is released, the pressure plate 70 is forcibly returned by the repulsive force of the spring 120 which is pressed against the cylinder 30. By this action, the brake shoe 60 is separated from the rotor by a predetermined clearance dimension at the same time when the brake is released. Therefore, the brake pad of the brake shoe 60 and the rotor are prevented from coming into contact with each other unnecessarily, and the wear and uneven wear of the brake pad are prevented.

[0014]

As described above, the caliper brake device for a railroad vehicle of the present invention is equipped with the brake shoe returning device on the anchor pin supporting the brake shoe, so that the brake shoe can be reliably pulled back by the two anchor pins. it can. Therefore,
The brake shoe will not come into contact with the rotor unnecessarily, and noise and wear can be reduced. Also, since you can add a return function just by replacing the anchor pin,
It has good compatibility and is easy to work with.

[Brief description of drawings]

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

FIG. 2 is a top view showing an embodiment of the present invention.

FIG. 3 is an enlarged explanatory view of an anchor pin portion.

[Explanation of symbols]

 1 Caliper Brake Device for Railway Vehicles 10 Caliper Brake Main Body 20, 22 Arms 30 Cylinder Body 32 Cylinder 40 Upper Anchor Block 50 Lower Anchor Block 60 Bracket 70 Pressure Plate 80 Brake Pad 100 Anchor Pin 110 Rod 120 Spring

Claims (1)

[Claims] 1. A caliper brake main body having a support frame fixed to a bogie of a railway vehicle and two arms sandwiching a wheel, a cylinder body disposed inside the two arms so as to face each other, and a cylinder. The body is provided with a brake that is pressed by a piston and an anchor pin that slidably supports both ends of the brake. The anchor pin includes a rod that penetrates through the center and an end of the rod on the brake side. A washer attached to the brake shoe and brought into contact with the brake shoe, a spring inserted into a hole formed on the opposite side of the anchor pin to the brake shoe, and a means for connecting the spring penetrating the spring and the spring. Caliper brake device for railway vehicles.