A traction machine brake structure

Abstract

The present invention discloses a traction machine brake structure, comprising a traction shaft, a pair of brake discs and a pressure plate, wherein a flange is arranged at one end of the traction shaft, friction materials are arranged on two opposite end surfaces of each brake disc, the pressure plate is fixed on one end of the traction shaft away from the flange, the cylindrical parts of the pair of brake discs are mounted on the traction shaft and axially restricted on the traction shaft through the flange and the pressure plate, and the first and second O-ring annular grooves are respectively provided on the end surface of the flange relative to one brake disc and the end surface of the pressure plate relative to the other brake disc, the first and second O-rings are embedded in the first and second O-ring annular grooves, and the first and second O-rings are compressed by preload force, so that the positions of the two brake discs are automatically adjusted after the brake is engaged and the two brake surfaces of each brake disc can maintain an air gap after the brake is released. The present invention effectively avoids the dynamic friction of the brake disc, prevents excessive loss of friction materials, reduces the noise of the traction machine during operation, and ensures the comfort of riding the elevator.

Description

Technical Field

[0001] The invention relates to the field of traction machines, and in particular to a traction machine brake structure. Background Art

[0002] After years of development, traction machine brakes have a variety of mature structures. One of them is a shaft brake with two sets of axial configurations. Each set includes a brake disc, an armature, an iron core, noise-absorbing rubber, etc. First, the brake disc is located on the inside and is splined to the shaft. The friction of the brake disc is used to stop the shaft from rotating. Then the armature and the iron core are located outside in turn. The coil in the iron core is powered on and off to complete the work of the brake. When powered on, the coil iron core generates electromagnetic force to attract the armature to overcome the brake spring force to release the brake on the traction shaft and make it rotate as needed. When powered off, there is no electromagnetic force to overcome the spring force of the brake spring, so the brake spring is released freely to push the armature to press the brake disc, thereby braking the traction shaft of the traction machine. Noise-absorbing rubber can reduce the vibration generated when the brake is working.

[0003] The noise-absorbing rubber is set to prevent the armature and the iron core from directly colliding when the brake is engaged, which can effectively reduce the noise. However, it has no effect on the noise when the brake is released, and there is a problem that has not been solved after the brake is engaged: after the brake is engaged, the brake disc loses its restriction and can rotate, and the brake disc is not in the middle of the reserved space, but is biased to one side or in the middle. Biasing to one side will cause sliding friction and increase the loss of brake materials. Summary of the invention

[0004] The technical problem to be solved by the present invention is that after the brake is engaged, the brake disc loses its restriction and can rotate, and the brake disc is not in the middle position of the reserved space, but is biased to one side or in the middle. Biasing to one side will produce sliding friction and increase the loss of brake material. A traction machine brake structure is provided, which mainly solves the problem that after the brake is released, the two braking surfaces of the brake disc can maintain an air gap, avoid dynamic friction when the traction machine is running, and reduce the noise when the brake is released.

[0005] In order to achieve the above-mentioned purpose of the invention, the traction machine brake structure of the present invention comprises a traction shaft, a pair of brake discs and a pressure plate, a flange is provided at one end of the traction shaft, and friction materials are provided on two opposite end surfaces of each brake disc, the pressure plate is fixed to the end of the traction shaft away from the flange by a fastener, and the cylindrical parts of a pair of brake discs are installed on the traction shaft and axially restricted on the traction shaft by the flange and the pressure plate, characterized in that a first O-ring annular groove is provided on the end surface of the flange relative to one brake disc, and a second O-ring annular groove is provided on the end surface of the pressure plate relative to the other brake disc, a first O-ring is embedded in the first O-ring annular groove, and a second O-ring is embedded in the second O-ring annular groove, the first O-ring and the second O-ring are compressed by a preload force, so that the positions of the two brake discs are automatically adjusted after the brake is engaged and the two brake surfaces of each brake disc can maintain an air gap after the brake is released.

[0006] In a preferred embodiment of the present invention, the two braking surfaces of each brake disc can maintain an air gap of 0.1-0.2 mm.

[0007] In a preferred embodiment of the present invention, an O-type rubber ring is sleeved on the traction shaft between the cylindrical parts of a pair of brake discs to prevent machining dimensional errors.

[0008] Due to the adoption of the above technical solution, the present invention can be applied to the traction machine shaft brake, effectively avoiding the dynamic friction of the brake disc, preventing excessive loss of friction materials, reducing the noise of the traction machine during operation, and ensuring the comfort of riding the elevator. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a structural schematic diagram of the present invention.

[0010] In the description of the present invention, it should be noted that the terms "up", "down", "left", "right", "inside", "outside", "longitudinal" and "lateral" indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings or the automotive engineering coordinate system. The above description is simplified for the convenience of describing the present invention, and does not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, it should not be understood as a limitation on the present invention.

[0011] The singular forms "a", "said" and "the" used in the specification include plural forms unless clearly indicated. The terms "include", "comprise" and "contain" used in the specification indicate the presence of the claimed features, but do not exclude the presence of one or more other features. The term "and / or" used in the specification includes any and all combinations of one or more of the relevant listed items.

[0012] In the specification, when an element is said to be "on", "fixed" to, "connected" to, "engaged" to, etc., another element, the element may be directly on, fixed to, connected to, engaged to, or in contact with the other element, or there may be intervening elements. In the specification, when a feature is arranged "adjacent" to another feature, it may mean that the feature has a portion overlapping with the adjacent feature or a portion located above or below the adjacent feature.

[0013] It is to be understood that although the terms "first", "second", etc. may be used herein to describe different elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from another element. Therefore, a first element may be referred to as a second element without departing from the teachings of the present application.

[0014] The following will describe exemplary embodiments of the present application with reference to the accompanying drawings. However, it should be understood that the present application can be presented in a variety of different ways and is not limited to the embodiments described below. It should also be understood that the embodiments disclosed herein can be combined in various ways to provide more additional embodiments. In all drawings, the same reference numerals represent the same or functionally identical elements.

[0015] See also Figure 1 The traction machine brake structure shown in the figure has the same basic structure as the existing traction machine shaft brake, and the parts not described below are the same as the existing traction machine shaft brake.

[0016] The traction machine brake structure shown in the figure mainly includes a traction shaft 10, a pair of brake discs 20a, 20b and a pressure plate 30. A flange 11 is provided at one end of the traction shaft 10. Friction materials 41a, 41b, 42a, 42b are provided on the two opposite end surfaces of each brake disc 20a, 20b. The pressure plate 30 is fixed to the end 12 of the traction shaft 10 away from the flange 11 by fasteners such as bolts 31. The cylindrical parts 21a, 22a of the pair of brake discs 20a, 20b are installed on the traction shaft 10 and are axially restricted on the traction shaft 10 by the flange 11 and the pressure plate 30.

[0017] The feature of the present invention is that a first O-ring annular groove is provided on the end surface of the flange 11 relative to one brake disc 20a, and a second O-ring annular groove is provided on the end surface of the pressure plate 30 relative to the other brake disc 20b. A first O-ring 40a is embedded in the first O-ring annular groove, and a second O-ring 40a is embedded in the second O-ring annular groove. The first O-ring 40a and the second O-ring 40b are compressed by a preload force so that the positions of the two brake discs 20a and 20b are automatically adjusted after the brake is engaged, so that the brake discs 20a and 20b are not deflected to generate dynamic friction, and an air gap can be maintained between the two brake surfaces of each brake disc 20a and 20b after the brake is released. The two brake surfaces of each brake disc can maintain an air gap of 0.1-0.2 mm, so that after the brake is engaged, the brake discs 20a and 20b can automatically adjust the brake discs 20a and 20b under the pre-pressure of the first O-ring 40a and the second O-ring 40b to maintain a gap on the brake surface to prevent dynamic friction when the traction machine is working.

[0018] In addition, an O-type rubber ring (not shown in the figure) is sleeved on the traction shaft 10 between the cylindrical parts 21a, 21b of a pair of brake discs 20a, 20b to prevent processing size errors.

Claims

1. A traction machine brake structure, comprising a traction shaft, a pair of brake discs and a pressure plate, wherein a flange is provided at one end of the traction shaft, friction materials are provided on two opposite end surfaces of each brake disc, the pressure plate is fixed to the end of the traction shaft away from the flange by fasteners, the cylindrical parts of a pair of brake discs are mounted on the traction shaft and axially restricted on the traction shaft by the flange and the pressure plate, characterized in that: A first O-ring annular groove is formed on the end surface of the flange opposite to one brake disc, and a second O-ring annular groove is formed on the end surface of the pressure plate opposite to the other brake disc. A first O-ring is embedded in the first O-ring annular groove, and a second O-ring is embedded in the second O-ring annular groove. The first O-ring and the second O-ring are compressed by a preload force so that the positions of the two brake discs are automatically adjusted after the brakes are engaged and an air gap is maintained between the two brake surfaces of each brake disc after the brakes are released.

2. A traction machine brake structure as claimed in claim 1, characterized in that: The two braking surfaces of each brake disc can maintain an air gap of 0.1 to 0.2 mm.

3. A traction machine brake structure according to claim 1 or 2, characterized in that: An O-type rubber ring is sleeved on the traction shaft between the cylindrical parts of a pair of brake discs.

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