Brake with more stable braking torque

Abstract

The utility model discloses a brake with more stable braking torque, and belongs to the technical field of traction machines. The brake device comprises a static iron core assembly, a movable iron core assembly and a brake disc which are sequentially arranged and installed, a coil assembly and a brake spring are arranged in the side face, facing one side of the movable iron core assembly, of the static iron core assembly, the movable iron core assembly is installed on a spacer bush in a sleeving mode and can move in the axial direction of the spacer bush, and the spacer bush is installed on the static iron core assembly. An air gap is formed between the movable iron core assembly and the static iron core assembly, the connecting bolt sequentially penetrates through the static iron core assembly and an inner hole of the spacer bush and then is fixed to a brake installation part on the traction machine, and the brake disc is located between the movable iron core assembly and the brake installation part and is in key connection with a main shaft of the traction machine. The brake is characterized in that a steel plate is additionally arranged between the brake mounting part and the brake disc, and a metal coating is arranged on the surface, acting with the brake disc, of the steel plate. The brake has the advantages of being convenient to maintain, effectively solving the rust adhesion problem, improving the corrosion resistance of the brake surface and prolonging the service life of the brake.

Description

Technical Field

[0001] The utility model belongs to the technical field of traction machines, and in particular relates to a brake with a more stable braking torque. Background Art

[0002] The brake installed on the traction machine transmits the braking torque to the traction sheave through the main shaft, brake disc or brake wheel during braking, so that the traction sheave cannot rotate further, thus playing the role of braking the traction machine. Therefore, ensuring good braking performance of the brake is the fundamental guarantee for the safety of passengers and their property in the elevator car.

[0003] From the factory to the installation in the elevator system, the traction machine has to go through the process of transportation and installation on the construction site. During this period, it may encounter long-term high humidity or even water. The surface of the brake disc of the brake will rust and adhere to the opposite brake surface. In this case, when the brake is used normally, the part of the casting brake surface that is severely adhered will be pulled off by the brake disc, destroying the brake surface, causing the brake torque to be unstable, and ultimately affecting the brake safety of the brake. Therefore, the consequences of rust adhesion are relatively serious. In order to prevent rust adhesion, the solution commonly used in the industry is to perform chemical rust prevention on the brake surface of the casting, such as blackening, phosphating, and anti-rust water coating. However, the anti-rust effect of these surface chemical treatments is relatively poor, and the anti-rust surface is soft and easy to wear. When the brake is installed and used, rust adhesion will still occur.

[0004] In view of the above-mentioned prior art, it is necessary to reasonably improve the existing traction machine brake structure. For this reason, the applicant has made a useful design, and the technical solution to be introduced below is produced under this background. Utility Model Content

[0005] The task of the utility model is to provide a brake with a more stable braking torque. By adding a steel plate with a metal coating between the brake mounting part and the brake disc, the problem of rust adhesion between the two is effectively solved, the corrosion resistance of the braking surface is improved, a more stable braking torque is ensured, and the service life of the brake is extended.

[0006] The task of the utility model is accomplished in this way: a brake with more stable braking torque is installed on a traction machine, comprising a static iron core assembly, a moving iron core assembly and a brake disc which are arranged in sequence, the static iron core assembly is provided with a coil assembly and a brake spring in the side surface facing the moving iron core assembly, the moving iron core assembly is sleeved on the spacer and can move axially along the spacer, the spacer is installed on the static iron core assembly, an air gap is formed between the moving iron core assembly and the static iron core assembly, the connecting bolts pass through the inner holes of the static iron core assembly and the spacer in sequence and are fixed to the brake mounting part on the traction machine, the brake disc is located between the moving iron core assembly and the brake mounting part and is connected and installed with the main shaft key of the traction machine, and is characterized in that a steel plate is additionally provided between the brake mounting part and the brake disc, and a metal coating is provided on the surface of the steel plate which interacts with the brake disc.

[0007] In a specific embodiment of the present invention, the steel plate is fixedly mounted on the brake mounting portion by fasteners.

[0008] In another specific embodiment of the present invention, the steel plate is pressed against the brake mounting portion by a spacer.

[0009] In another specific embodiment of the present invention, the metal coating is a zinc coating.

[0010] In another specific embodiment of the present invention, the metal plating layer is a chrome plating layer.

[0011] In another specific embodiment of the present invention, the metal plating layer is a nickel plating layer.

[0012] In a further specific embodiment of the present invention, the metal plating layer is a cadmium plating layer.

[0013] In a further specific embodiment of the present invention, the metal plating layer is a chemically plated nickel-phosphorus layer.

[0014] The utility model has the beneficial effects of adopting the above structure: firstly, the separate design of the steel plate makes the subsequent brake surface maintenance more convenient; secondly, the metal coating has good corrosion resistance, good rust prevention effect, good wear resistance and stability, which can greatly reduce the rust and adhesion of the steel plate and the brake disc when they are placed in a humid environment for a long time. After experimental verification, under the condition of ensuring the same friction coefficient as the prior art, in the same environment and time, the adhesion torque of the steel plate with metal coating can be reduced by about 85%, so as to obtain the best effect in a more economical and feasible way, ensure a more stable braking torque, and solve the problems in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1This is a schematic diagram of the installation of an embodiment of the brake of the utility model;

[0016] Figure 2 This is a schematic diagram of the installation of another embodiment of the brake of the utility model;

[0017] Figure 3 for Figure 2 A partial enlarged view of .

[0018] In the figure: 1. static iron core assembly; 2. moving iron core assembly; 3. brake disc; 4. spacer; 5. coil assembly; 6. brake spring; 7. connecting bolt; 8. steel plate, 81. metal coating, 82. opening; 9. main shaft; 10. brake mounting part. DETAILED DESCRIPTION

[0019] The specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings, but the description of the embodiments is not a limitation of the technical solution. Any changes in form rather than substance based on the concept of the present invention should be regarded as the protection scope of the present invention.

[0020] In the following description, all concepts related to directionality or orientation such as up, down, left, right, front and back are based on the positions shown in the corresponding drawings, and therefore cannot be understood as a special limitation on the technical solution provided by the utility model.

[0021] See also Figure 1 , Figure 2 The utility model relates to a brake with more stable braking torque, which is installed on a traction machine, and specifically includes a static iron core assembly 1, a moving iron core assembly 2 and a brake disc 3 which are arranged and installed in sequence. The static iron core assembly 1 is provided with a coil assembly 5 and a brake spring 6 on the side facing the moving iron core assembly 2. The moving iron core assembly 2 is sleeved on a spacer sleeve 4 and can move axially along the spacer sleeve 4. The spacer sleeve 4 is installed on the static iron core assembly 1, and an air gap is formed between the moving iron core assembly 2 and the static iron core assembly 1. The connecting bolts 7 pass through the inner holes of the static iron core assembly 1 and the spacer sleeve 4 in sequence and are fixed in the brake mounting part 10 of the traction machine. The brake disc 3 is located between the moving iron core assembly 2 and the brake mounting part 10 and is key-connected and installed with the traction machine main shaft 9.

[0022] The technical key point of the present invention is that a steel plate 8 is added between the brake mounting portion 10 and the brake disc 3. Figure 1 As shown, the steel plate 8 is pressed against the brake mounting portion 10 by the spacer 4. Figure 2 As shown, the steel plate 8 is provided with an opening 82 for bypassing the spacer sleeve 4, and the steel plate 8 is fixedly mounted on the brake mounting portion 10 by fasteners.

[0023] Please continue reading Figure 2Combined with Figure 3 As shown, the surface of the steel plate 8 interacting with the brake disc 3 is provided with a metal coating 81. The material of the metal coating 81 is not limited in any way, and can be a zinc coating, a chrome coating, a nickel coating, a cadmium coating, or a chemical nickel-phosphorus coating, etc. Since the metal coating 81 has good corrosion resistance, i.e., good rust prevention effect and good stability, it can effectively and significantly reduce the occurrence of rust and adhesion between the steel plate 8 and the brake disc 3 when they are placed in a humid environment for a long time.

Claims

1. A brake with a more stable braking torque, installed on a traction machine, comprising a static iron core assembly (1), a moving iron core assembly (2) and a brake disc (3) arranged in sequence, wherein the static iron core assembly (1) is provided with a coil assembly (5) and a brake spring (6) on the side facing the moving iron core assembly (2), the moving iron core assembly (2) is sleeved on a spacer (4) and can move axially along the spacer (4), the spacer (4) is installed on the static iron core assembly (1), an air gap is formed between the moving iron core assembly (2) and the static iron core assembly (1), a connecting bolt (7) is passed through the inner holes of the static iron core assembly (1) and the spacer (4) in sequence and then fixed on a brake mounting portion (10) on the traction machine, the brake disc (3) is located between the moving iron core assembly (2) and the brake mounting portion (10) and is key-connected and installed with a main shaft (9) of the traction machine, characterized in that: A steel plate (8) is additionally provided between the brake mounting portion (10) and the brake disc (3), and a metal coating (81) is provided on the surface of the steel plate (8) that interacts with the brake disc (3).

2. A brake with more stable braking torque according to claim 1, characterized in that: The steel plate (8) is fixedly mounted on the brake mounting portion (10) via fasteners.

3. A brake with more stable braking torque according to claim 1, characterized in that: The steel plate (8) is pressed against the brake mounting portion (10) by the spacer (4).

4. A brake with more stable braking torque according to claim 1, characterized in that: The metal coating (81) is a zinc coating.

5. A brake with more stable braking torque according to claim 1, characterized in that: The metal plating layer (81) is a chrome plating layer.

6. A brake with more stable braking torque according to claim 1, characterized in that: The metal plating layer (81) is a nickel plating layer.

7. A brake with more stable braking torque according to claim 1, characterized in that: The metal plating layer (81) is a cadmium plating layer.

8. A brake with more stable braking torque according to claim 1, characterized in that: The metal plating layer (81) is a chemically plated nickel-phosphorus layer.

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