Brake for subway rail vehicle

Abstract

The utility model relates to a brake for a subway rail vehicle. The brake comprises a mounting seat, two connecting shafts, two side lugs and two brake shoes, a mounting cavity is formed in the mounting seat, the two connecting shafts are arranged between the front side and the rear side of the inner wall of the mounting seat in a penetrating mode, the two side lugs are arranged on the outer sides of the two connecting shafts in a sleeving mode, and the two brake shoes are mounted on the two side lugs correspondingly. According to the brake for the metro rail vehicle, through the action of the brake shoe and the elastic piece, when the contact surface of the brake shoe and a wheel pair tread is abraded, the position of the brake shoe can be automatically adjusted, the distance generated due to abrasion is compensated, it is ensured that the brake shoe can make tight and rapid contact with the tread all the time, and therefore the braking efficiency is kept; the influence of abrasion of the brake shoe on the braking performance is greatly reduced, the maintenance cost and the time cost caused by frequent replacement of the brake shoe are reduced, and meanwhile the service life of the whole braking system is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of subway brakes, and particularly relates to a brake for subway rail vehicles. Background Technique

[0002] The subway is a form of railway transportation, referring to an urban rail transit system mainly operating underground, that is, the abbreviation of the subway. Many such systems may turn into ground or elevated sections outside the city center in order to match the construction environment and consider construction and operation costs. The subway brake is an important part of the subway train braking system, which is responsible for providing the necessary braking force when the train needs to decelerate or stop.

[0003] Subway trains generally use shoe brakes as part of their braking systems. This brake effectively slows down and stops the train's movement through the friction between the brake shoes and the wheel treads. However, with the accumulation of usage time, the brake shoes will inevitably experience wear, which will gradually weaken the braking effect and thus prolong the braking time of the train. Therefore, a brake for subway rail vehicles is proposed to solve the above technical problems. Content of the Utility Model

[0004] Aiming at the deficiencies of the prior art, the utility model provides a brake for subway rail vehicles, which solves the problem that wear will gradually weaken the braking effect and thus prolong the braking time of the train.

[0005] To achieve the above purpose, the utility model provides the following technical solution: A brake for subway rail vehicles includes a mounting seat, two connecting shafts, two side ears, and two brake shoes;

[0006] An installation cavity is opened inside the mounting seat. The two connecting shafts are both arranged through the front and rear sides of the inner wall of the mounting seat. The two side ears are both sleeved on the outer sides of the two connecting shafts, and the two brake shoes are respectively installed on the two side ears;

[0007] Parts of the two brake shoes extend out from the inside of the mounting seat, and the opposite sides of the two brake shoes are inclined so that an angle less than 30 degrees is formed between the two brake shoes;

[0008] Two elastic members are further arranged inside the mounting seat, and the two elastic members are respectively in contact with the two brake shoes.

[0009] Further, the front sides of the two brake shoes are concaved inward towards the mounting seat to form an arc surface.

[0010] Further, the front side of the mounting seat is concaved backward inward to form an inward concave part.

[0011] Further, the elastic member includes two sleeves installed on the rear side of the inner wall of the mounting seat, and elastic columns are arranged inside the sleeves.

[0012] Further, both of the elastic columns are styrene-butadiene elastic rubbers, and the two elastic columns are arranged at intervals up and down.

[0013] Further, the two elastic columns respectively abut against the backs of the two brake shoes.

[0014] Further, the two elastic columns are respectively arranged close to the upper and lower sides of the mounting seat.

[0015] Compared with the prior art, the technical solution of the present application has the following beneficial effects:

[0016] For the brake for subway rail vehicles, through the action of the brake shoes and the elastic member, when the contact surface between the brake shoes and the tread of the wheel set wears, the position of the brake shoes can be automatically adjusted to compensate for the spacing generated due to wear, ensuring that the brake shoes can always closely and quickly contact the tread, so as to maintain the braking efficiency. Due to the automatic compensation function, the influence of the wear of the brake shoes on the braking performance is greatly reduced, reducing the maintenance cost and time cost brought by frequent replacement of the brake shoes, and at the same time extending the service life of the overall braking system. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic structural diagram of the present utility model;

[0018] Figure 2 is a schematic sectional structural diagram of the present utility model;

[0019] Figure 3 is a schematic right view structural diagram of the present utility model.

[0020] In the figure: 1, mounting seat; 2, connecting shaft; 3, side ear; 4, brake shoe; 5, sleeve; 6, elastic column. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0022] Please refer to Figures 1 - 3 , a brake for subway rail vehicles in this embodiment is used to compensate for the spacing between the brake shoe 4 and the tread, and prevent the braking time from becoming longer during braking;

[0023] Specifically, it includes a mounting base 1, two connecting shafts 2, two side ears 3 and two brake shoes 4; an installation cavity is formed inside the mounting base 1, the two connecting shafts 2 are both arranged through the front and rear sides of the inner wall of the mounting base 1, the two side ears 3 are both sleeved on the outer sides of the two connecting shafts 2, and the two brake shoes 4 are respectively installed on the two side ears 3; parts of the two brake shoes 4 extend from inside the mounting base 1, and the opposite sides of the two brake shoes 4 are inclined so that an angle less than 30 degrees is formed between the two brake shoes 4; two elastic members are also arranged inside the mounting base 1, and the two elastic members are respectively in contact with the two brake shoes 4.

[0024] During the actual use process, when the contact surfaces of the two brake shoes 4 and the wheel set are worn, the angle between the two sides where the two brake shoes 4 are in contact with each other will increase due to wear, and the two brake shoes 4 are pushed by the two elastic members to rotate towards each other, so that the opposite sides of the two brake shoes 4 always fit each other, and the side of the brake shoe 4 close to the tread moves towards the tread direction accordingly, so as to compensate for the distance between the brake shoe 4 and the tread, so as to ensure that the brake shoe 4 can quickly contact the tread during braking.

[0025] During the actual setting, through the action of the brake shoe 4 and the elastic member, when the contact surface between the brake shoe 4 and the wheel set tread is worn, the position of the brake shoe 4 can be automatically adjusted to compensate for the distance generated by wear, ensuring that the brake shoe 4 can always contact the tread tightly and quickly, so as to maintain the braking efficiency. Due to the automatic compensation function, the influence of the wear of the brake shoe 4 on the braking performance is greatly reduced, reducing the maintenance cost and time cost brought by frequent replacement of the brake shoe 4, and at the same time extending the service life of the overall braking system.

[0026] Furthermore, in order to adapt to the shape of the wheel set tread, the front sides of the two brake shoes 4 in this embodiment are both concave towards the mounting base 1 to form an arc surface, and the front sides of the two brake shoes 4 are both concave towards the mounting base 1 to form an arc surface.

[0027] During the actual setting, the arc surface can better fit the curvature of the wheel set tread, thereby increasing the contact area between the brake shoe 4 and the tread, not only improving the braking efficiency, but also enhancing the braking stability, and reducing the slipping or uneven braking force caused by poor contact.

[0028] Specifically, in order for the two brake shoes 4 to rotate towards each other effectively after wear, the elastic members in this embodiment include two sleeves 5 installed on the rear side of the inner wall of the mounting base 1, elastic columns 6 are arranged inside the sleeves 5, and the two elastic columns 6 are respectively in contact with the back surfaces of the two brake shoes 4.

[0029] In actual setting, the initial state of the two elastic columns 6 is in a compressed state, that is, when the two brake shoes 4 are worn, the two elastic columns 6 can automatically rebound and then push the two brake shoes 4 to rotate towards each other, so as to compensate for the distance between the brake shoes 4 and the tread.

[0030] Preferably, the two elastic columns 6 are both styrene-butadiene elastic rubber, the two elastic columns 6 are arranged at intervals up and down, and the two elastic columns 6 are respectively arranged close to the upper and lower sides of the mounting seat 1.

[0031] In actual setting, styrene-butadiene elastic rubber is used as the material of the elastic column 6, which provides good elasticity and resilience, and can quickly and stably push the brake shoe 4 to rotate towards each other and compensate after the brake shoe 4 is worn, ensuring that the brake shoe 4 always maintains close contact with the tread. Styrene-butadiene rubber has good wear resistance and aging resistance, can maintain stable performance during long-term use, reduce the performance degradation caused by material aging or wear, and thus extend the service life of the elastic column 6 and the entire braking system.

[0032] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A brake for a subway rail vehicle, characterized in that: It includes a mounting base (1), two connecting shafts (2), two side ears (3) and two brake shoes (4); An installation cavity is formed inside the mounting base (1). The two connecting shafts (2) are both arranged through the front and rear sides of the inner wall of the mounting base (1). The two side ears (3) are both sleeved on the outer sides of the two connecting shafts (2). The two brake shoes (4) are respectively installed on the two side ears (3); Parts of the two brake shoes (4) extend out of the inside of the mounting base (1), and the opposite sides of the two brake shoes (4) are inclined so that an angle less than 30 degrees is formed between the two brake shoes (4); Two elastic members are further arranged inside the mounting base (1), and the two elastic members are respectively in contact with the two brake shoes (4).

2. The brake for a subway rail vehicle according to claim 1, wherein: The front sides of the two brake shoes (4) are both concave towards the mounting base (1) to form an arc surface.

3. The brake for a subway rail vehicle according to claim 1, characterized in that: The front side of the mounting base (1) is concave backward to form a concave portion.

4. A brake for a subway rail vehicle according to claim 1, characterized in that: The elastic members include two sleeves (5) installed on the rear side of the inner wall of the mounting base (1). An elastic column (6) is arranged inside the sleeve (5).

5. The brake for a subway rail vehicle according to claim 4, characterized in that: The two elastic columns (6) are both styrene-butadiene elastic rubbers, and the two elastic columns (6) are arranged at intervals up and down.

6. The brake for a subway rail vehicle according to claim 4, characterized in that: The two elastic columns (6) are respectively in contact with the backs of the two brake shoes (4).

7. The brake for a subway rail vehicle according to claim 4, characterized in that: The two elastic columns (6) are respectively arranged close to the upper and lower sides of the mounting base (1).

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