JPH11268648A - Pull up device for brake shoe of caliper brake for rolling stock - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a device for a caliper braking device, suitable for work of pulling out a brake shoe to be mounted in the arm. SOLUTION: A brake shoe 70 to be installed on an arm of a main body 10 of a caliper brake is inserted from the lower side of the arm toward upward in the vertical direction, and is fixed with a lower portion anchor block. When the brake shoe maintained with a dovetail groove related to the arm, it is pulled out downwardly by its own gravity with removal of the lower portion anchor block. Contrary, when it is fixed by heat deformation or the like, a pulling out device 200 is hung on a hole 78 of the brake shoe 70 by using a hook 214. Then the brake shoe is pulled by impacting on a stopper member 230 by a weight 220.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

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

[0002]

2. Description of the Related Art For example, Japanese Patent Laying-Open No. 8-226469 discloses a caliper brake device mounted on a railway vehicle. This type of brake device has a frame fixed to a bogie of a railway vehicle, and a caliper brake body slidably supported on the frame via two pins.
The caliper brake body includes two arms that sandwich a rotor attached to a vehicle wheel, and a brake shoe having a brake pad is attached to a surface of the arm facing the rotor. The brake shoe is replaced when wear occurs. For this purpose, a configuration is adopted in which the brake shoe is inserted into each arm from below, and the brake shoe is fixed to the arm with an anchor block.

[0003]

In this type of brake device, the brake shoe is inserted and fixed vertically to the arm side of the caliper by using a dovetail groove structure. A new brake shoe is easily inserted into the arm, but is deformed by thermal stress due to the use of the brake, and the engaging part of the dovetail structure is fixed or tightened with excessive friction Occurs. The present invention provides an apparatus used for the operation of extracting the brake shoe in such a state.

[0004]

According to the present invention, there is provided a pull-out device, comprising: a support frame fixed to a bogie of a railroad vehicle; and two support pins slidably supporting the support frame in the axial direction of the support pins. A caliper brake body, two arms provided on the caliper brake body to sandwich the wheels of the vehicle, a brake shoe inserted into the arm by using a dovetail groove structure, and an anchor pin holding the brake shoe. A rod having a hook portion that engages with a mounting hole provided in the brake shoe, which is used when pulling out the brake shoe of the caliper brake device for a railway vehicle including: And a stopper member provided at the lower end of the rod to receive the impact force of the weight. The rod can have a divided structure connected by a screw portion, and the stopper member has a screw portion screwed to a screw portion formed on the rod.

[0005]

FIG. 1 is a side view of a caliper brake device to which the present invention is applied, and FIG. 2 is a plan view. The caliper brake device, generally designated by reference numeral 1, has a caliper-shaped main body 10 sandwiching the wheels 5, and the main body 10 is supported by a support frame 20 via two support pins 30,32. The support frame 20 has a groove 22 provided on the lower surface side, and the entire caliper brake device is fixed on a bogie of the vehicle using the groove 22.

The main body 10 comprises two arms 1 sandwiching wheels.
2, the first arm 12 is equipped with two hydraulic cylinders 40. Also, this first arm 1
2 is provided with a gap adjusting device 50 for automatically adjusting a gap between a brake shoe having a brake shoe and a rotor attached to a wheel.

At the upper end of the first arm 12, an upper brake receiving member 60 is provided. Upper brake shoe receiving member 60
Receives the upper end of the brake shoe 70 via the upper anchor pin 64. The upper brake shoe receiving member 60 includes an anchor bolt 62.
Is fixed to the first arm 12. At the lower end of the first arm 12, a lower brake shoe receiving member 80 is disposed. The lower brake shoe receiving member 80 receives the lower end of the brake shoe 70 via the lower anchor pin 84. The lower brake shoe receiving member 80 is connected to the second arm 12 via an anchor bolt 82.
To be fixed.

The second arm 14 disposed opposite to the first arm 12 does not have a cylinder for pressing the brake shoe 70. Therefore, the main body 10 is connected to the support pins 30, 32.
Thereby, the support pin can be slid in the axial direction, and a structure for supporting in a floating state is adopted. The second arm 14 also includes an upper brake shoe receiving member 60a and a lower brake shoe receiving member, and supports the brake shoe 70.

FIG. 3 is an explanatory view showing the overall structure of the brake shoe 70. As shown in FIG. The brake shoe 70 has a structure in which a segment 74 of a brake lining member is fixed on a back plate 72 by fixing means 75. In the illustrated embodiment, 4
Each segment 74 is provided with a groove 74a or the like. Back plate 72
On the opposite side of the segment 74, a guide plate 76
Is attached. The guide plate 76 is used for the brake shoe 7.
0 is attached to the arm of the brake body.
A tapered surface 76a having a widened tip is formed on both sides. At the upper and lower ends of the guide plate 76, recesses 77 for engaging the anchor pins are formed.

The end of the brake shoe 70 is provided with a hole 78 with which a pulling device described later is engaged.

FIG. 4 is an explanatory view showing a mounting structure of the brake shoe 70 to the caliper brake main body 10. A guide rail member 100 pressed by a piston is attached to the arm 12 on one cylinder side of the main body 10, and the guide plate 76 of the brake shoe 70 is inserted into the guide rail member 100 to thereby control the brake shoe 70. Is supported. Thereafter, the anchor block is fixed to the anchor block mounting surface 90 by using the bolt holes 92 to prevent the brake shoe 70 from dropping downward. The brake shoe 70 is directly attached to the arm 14 on the side opposite to the cylinder using the groove 94 formed inside the arm.

FIG. 5 shows the arm 1 of the caliper brake main body.
It is explanatory drawing which shows the effect | action which pulls out the brake shoe 70 inserted in 2,14 below. The lower end of the brake shoe 70 for the arm 14 on the side opposite to the cylinder will be described with reference to FIG. The flat end portion 76b of the guide plate 76 abuts on the anchor block surface 80b and is fixed. The anchor block 80a is held on the arm side by the anchor spring 110, and is prevented from falling off. Arm 1 on cylinder side
2, the guide rail member 1 is provided inside the arm 12.
00 is attached, and the brake shoe 70 is inserted into the guide rail member 100.

The brake shoe 70 is pushed up until the concave portion 77 at the upper end of the guide plate 76 contacts the upper receiving member, and the anchor pin 84 integral with the anchor block 80 contacts the concave portion 77 at the lower portion of the guide plate 76. The anchor block 80 is fixed to the arm by bolts. The anchor block 80 is held on the arm side by an anchor spring 110. Therefore, when removing the brake shoe 70, the anchor bolt can be removed, and the anchor pin 84 can be removed from the recess 77 of the brake shoe, whereby the brake shoe 70 can be pulled out downward.

FIG. 6 is an explanatory view showing the entire structure of the brake device pulling-out device of the present invention. The device for pulling out a brake shoe, generally designated by the reference numeral 200, has a rod 210,
The upper end of 10 is bent to form a hook portion 214. The rod 210 has an appropriate length dimension, and
It can be made of a bar or a two-part structure in which the middle part is connected by a screw part 216. By adopting the two-part structure, the weight can be easily attached, and it is convenient to carry.

At the lower end of the rod 210, a screw portion 212 is provided.
Are formed, and the stopper member 23 is
The weight 220 has an inner diameter hole 222 having a sufficient clearance for the outer dimensions of the rod 210 and is loosely fitted to the rod 210. With this configuration, the weight 2
20 is raised and lowered in the direction of arrow H,
0 can collide with the stopper 230 to receive an impact force.

FIG. 7 is an explanatory view showing the operation of the brake pulling device of the present invention. In the work of pulling out the brake shoe from the caliper brake device 1 mounted on the vehicle,
First, the anchor bolt 82 shown in FIG. 1 is removed, and the lower brake shoe receiving member (anchor block) 80 is removed. Bracelet 7
0 is engaged with the guide plate 76 shown in FIG. 3 inserted into the dovetail groove with respect to the brake body side. In the brake shoe after operation, the dovetail engagement portion is fixed due to thermal deformation or the like, and the brake shoe 70 may be in a state where it cannot be pulled down by its own weight. Brake puller 200 of the present invention
Is used for pulling out the brake shoe in such a case.

As shown in FIG. 7, after the lower brake shoe receiving member is removed, the hook 214 at the tip of the rod 210 is hooked into the hole 78 of the brake shoe 70. In this state, the operator applies the impact force to the stopper member 230 by vertically moving the weight 220 with the other hand while supporting the lower end of the brake shoe 70 with one hand. This impact force is transmitted to the brake shoe 70 via the hook portion 214, and the brake shoe 70 can be pulled downward against the frictional force of the dovetail engaging portion.

[0018]

As described above, the present invention relates to a caliper brake device used for a brake device of a railway vehicle and the like, which is used for removing a brake shoe having a brake pad segment attached to a caliper body. To provide a drawing device. The brake shoe is inserted into the brake device by a dovetail structure. Although it is easy to insert a new brake shoe into the other dovetail groove, there is a case where the dovetail engaging portion is stuck due to thermal stress generated during operation. In such a case, it is difficult to pull out the used brake shoe to replace the brake shoe. By using this pull-out device, the work can be easily performed even if the work space is in a narrow space under the chassis.

[Brief description of the drawings]

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

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

FIG. 3 is an explanatory view showing a structure of a brake shoe.

FIG. 4 is an explanatory view showing a structure for holding a brake shoe.

FIG. 5 is an explanatory view showing the operation of removing the brake shoe.

FIG. 6 is an explanatory view showing the overall configuration of the brake device pulling-out device of the present invention.

FIG. 7 is an explanatory view showing the operation of the brake device pulling-out device of the present invention.

DESCRIPTION OF SYMBOLS 1 Caliper brake device for railway vehicle 10 Caliper brake main body 12 Cylinder side arm 14 Cylinder side arm 20 Frame 30 Upper support pin 32 Lower support pin 40 Hydraulic cylinder 50 Clearance adjusting device 60 Upper anchor block 64 Upper anchor pin 70 Brake 80 Lower anchor block 82 Lower anchor bolt 84 Lower anchor pin 100 Guide rail member 110 Anchor spring 200 Brake puller 210 Rod 220 Weight 230 Stopper member

Claims (3)

[Claims] 1. A support frame fixed to a bogie of a railway vehicle,
A caliper brake body slidably supported in the axial direction of the support pins by two support pins with respect to the support frame; two arms provided on the caliper brake body to sandwich a vehicle wheel; A device for pulling out a brake shoe of a caliper brake device for a railway vehicle including a brake shoe inserted using a dovetail groove structure and an anchor pin for holding the brake shoe, wherein a mounting hole provided in the brake shoe is provided. A pull-out device for a brake shoe including a rod having a hook portion to be engaged, a weight slidably inserted into the rod, and a stopper member provided at a lower end of the rod and receiving an impact force of the weight. 2. The device for pulling out a brake shoe according to claim 1, wherein the rod has a divided structure connected by a screw portion. 3. The pulling-out device for a brake shoe according to claim 1, wherein the stopper member has a threaded portion screwed into a threaded portion formed on the rod.