Low noise high protection electromagnetic brake

Abstract

The utility model relates to brake technical field provides a kind of low-noise high protection electromagnetic brake, including stator, armature, rotor and flange, stator one end is equipped with cavity, armature, rotor and flange are sequentially arranged in cavity along by inside to outside direction, and flange is fixedly connected with stator, the side wall of cavity is equipped with mounting ring groove, and inner porous sound-absorbing member is equipped in mounting ring groove, the opening of cavity is equipped with outer porous sound-absorbing member. The utility model sets up mounting ring groove on the side wall of cavity, and sets up inner porous sound-absorbing member in mounting ring groove, while setting up outer porous sound-absorbing member in the opening of cavity, reach the purpose of sound absorption and noise reduction, compared with the way of only through sealing cavity to reduce noise, greatly improve the noise reduction effect.

Description

Technical Field

[0001] This utility model relates to the field of brake technology, and more specifically, to a low-noise, high-protection electromagnetic brake. Background Technology

[0002] Electromagnetic brakes, as an important braking actuator, are widely used in elevators, lifting machinery, CNC machine tools, textile machinery, and many other fields. However, commercially available electromagnetic brakes often generate significant noise during operation due to factors such as the assembly gap between the stator and flange, friction and collision between braking components, and internal structural vibrations.

[0003] For high-protection electromagnetic brakes, existing technologies (such as patent documents with publication numbers "CN208331063U" and "CN218564242U") mostly use a cover plate to seal the stator, enclosing all components inside the stator to ensure protection while reducing noise. However, this method relies solely on the physical barrier of the sealed cavity; noise generated by the internal components can still easily escape through the stator and cover plate, resulting in a relatively poor noise reduction effect. Utility Model Content

[0004] The purpose of this invention is to provide a low-noise, high-protection electromagnetic brake to overcome the aforementioned deficiencies in the prior art.

[0005] This utility model is achieved through the following technical solution:

[0006] A low-noise, high-protection electromagnetic brake includes a stator, an armature, a rotor, and a flange. One end of the stator has a cavity. The armature, rotor, and flange are arranged sequentially in the cavity from the inside to the outside, and the flange is fixedly connected to the stator. The side wall of the cavity has a mounting ring groove. An inner porous sound-absorbing element is provided in the mounting ring groove, and an outer porous sound-absorbing element is provided at the opening of the cavity.

[0007] Optionally, the internal porous sound-absorbing element is made of a flexible material.

[0008] Optionally, a plurality of phase change microcapsules are embedded in the inner side of the porous sound-absorbing component, and a capsule fixing ring is fixedly connected to the side wall of the cavity.

[0009] Optionally, the capsule retaining ring is made of sound-absorbing material.

[0010] Optionally, the bottom of the cavity is provided with a limiting ring groove, one end of the capsule fixing ring is engaged with the limiting ring groove, and the other end is bonded and fixed to the side wall of the cavity.

[0011] Optionally, a sound-absorbing strip is filled between the flange and the side wall of the cavity.

[0012] Optionally, the inner porous sound-absorbing element and the outer porous sound-absorbing element are made of polyester fiber cotton.

[0013] Optionally, the external porous sound-absorbing component is bonded and fixed to the flange.

[0014] The technical solution of this utility model has at least the following advantages and beneficial effects:

[0015] 1. In this utility model, an mounting ring groove is provided on the side wall of the cavity, and an inner porous sound-absorbing component is provided in the mounting ring groove. At the same time, an outer porous sound-absorbing component is provided at the cavity opening, thereby achieving the purpose of sound absorption and noise reduction. Compared with the existing method of noise reduction by simply sealing the cavity, the noise reduction effect is greatly improved.

[0016] 2. In this utility model, a phase change microcapsule is embedded in the inner side of the porous sound-absorbing component. That is, the microcapsule is filled with a phase change material. The phase change material becomes liquid after being heated and gradually and slowly dissipates heat to return to a solid state after being deheated. By utilizing the characteristics of the phase change material, it is possible to avoid the brake from overheating and burning out due to severe heat generation when it is energized.

[0017] 3. In this utility model, the capsule fixing plate is made of sound-absorbing material, which works together with the inner porous sound-absorbing component and the outer porous sound-absorbing component to further improve the noise reduction effect. Attached Figure Description

[0018] Figure 1 A front view of a low-noise, high-protection electromagnetic brake provided by this utility model;

[0019] Figure 2 for Figure 1 AA section view;

[0020] Figure 3 for Figure 2 Enlarged view of point B;

[0021] Figure 4 A schematic diagram showing the relationship between the mounting annular groove, the limiting annular groove, and the cavity;

[0022] Reference numerals in the attached drawings: 1-Stator, 101-Cavity, 102-Mounting ring groove, 103-Limiting ring groove, 2-Armature, 3-Rotor, 4-Flange, 5-Inner porous sound-absorbing component, 6-Outer porous sound-absorbing component, 7-Phase change microcapsule, 8-Capsule fixing ring, 9-Silencing strip, 10-Positioning sleeve, 11-Sealing ring. Detailed Implementation

[0023] refer to Figures 1-4A low-noise, high-protection electromagnetic brake includes a stator 1, an armature 2, a rotor 3, and a flange 4. One end of the stator 1 has a cavity 101. The armature 2, rotor 3, and flange 4 are sequentially arranged within the cavity 101 from the inside out, and the flange 4 is fixedly connected to the stator 1. During brake installation, a sealing ring groove is provided on the side of the stator 1 that contacts the mounting surface, and a sealing ring 11 is installed within the sealing ring groove to ensure the sealing of the cavity 101.

[0024] Alternatively, in this embodiment, the flange 4 and the stator 1 are connected by screws. Furthermore, a positioning sleeve 10 is fitted onto the screw, with one end of the positioning sleeve 10 abutting against the stator 1 and the other end abutting against the flange 4, thereby limiting the distance between the bottom of the cavity 101 and the flange 4, eliminating the need for manual adjustment of the braking clearance. In addition, those skilled in the art should understand that the armature 2 should have a hole or notch through which the positioning sleeve 10 passes, facilitating radial positioning of the armature 2, while the positioning sleeve 10 serves as a guide for the movement of the armature 2.

[0025] Those skilled in the art should understand that the stator 1 consists of a magnetic yoke and coils, with the coils installed inside the magnetic yoke. Unless otherwise specified, "stator 1" in this embodiment refers to the magnetic yoke. Furthermore, a pressure spring (not shown) should be provided between the magnetic yoke and the armature 2. Specifically, a blind hole can be provided on the magnetic yoke, and the pressure spring is installed inside the blind hole and abuts against the armature 2. In the de-energized state, the pressure spring applies pressure to the armature 2, causing the rotor 3 to be held tightly between the armature 2 and the flange 4, thus achieving braking. In the energized state, the magnetic yoke attracts the armature 2 (while the pressure spring is compressed), releasing the grip on the rotor 3, thereby releasing the brake.

[0026] The side wall of the cavity 101 is provided with a mounting ring groove 102, and an inner porous sound-absorbing component 5 is provided inside the mounting ring groove 102. An outer porous sound-absorbing component 6 is provided at the opening of the cavity 101. The inner porous sound-absorbing component 5 and the outer porous sound-absorbing component 6 work together to achieve the purpose of sound absorption and noise reduction. Compared with the existing method of noise reduction by simply sealing the cavity 101, the noise reduction effect is greatly improved.

[0027] In this embodiment, the internal porous sound-absorbing component 5 is made of a flexible material, specifically polyester fiber cotton. In other embodiments, the internal porous sound-absorbing component 5 can also be made of other materials, such as rock wool, glass wool, sound-absorbing sponge, flexible foamed rubber, etc. In this embodiment, the internal porous sound-absorbing component 5 is also made of polyester fiber cotton, but in other embodiments, other materials mentioned above can also be selected.

[0028] As an alternative, in this embodiment, the external porous sound-absorbing component 6 is installed as follows: the external porous sound-absorbing component 6 is bonded and fixed to the flange 4. It should be understood that in practical applications, a hole should be drilled in the center of the external porous sound-absorbing component 6 (not shown in the figure) to ensure that the rotating shaft can be connected to the rotor 3. In other embodiments, the external porous sound-absorbing component 6 can of course be installed in other ways. For example, the external porous sound-absorbing component 6 can be directly embedded in the opening of the cavity 101 and in contact with the flange 4. After the brake is installed as a whole, the external porous sound-absorbing component 6 is pressed between the flange 4 and the mounting surface.

[0029] The inner porous sound-absorbing component 5 has several phase change microcapsules 7 embedded inside. A capsule fixing ring 8 is fixedly connected to the side wall of the cavity 101. The capsule fixing ring 8 serves as a limit for the phase change microcapsules 7, preventing them from detaching from the inner porous sound-absorbing component 5. It is worth noting that the phase change microcapsules 7 are a mature technology, composed of a capsule material and a core material. The capsule material is typically made of melamine formaldehyde, polyurethane, polyacrylate, gelatin, gum arabic, etc., while the core material is a phase change material encapsulated inside the capsule material, typically a docosane, tetradecyl alcohol, octadecane, tetradecane, etc. The phase change material becomes liquid when heated and gradually and slowly returns to a solid state after being deheated. Utilizing the properties of the phase change material, it can prevent the brake from overheating and burning out due to excessive heat when energized.

[0030] Furthermore, the capsule fixing ring 8 is made of sound-absorbing material, which works together with the inner porous sound-absorbing component 5 and the outer porous sound-absorbing component 6 to further improve the sound absorption and noise reduction effect. Alternatively, in this embodiment, the capsule fixing ring 8 is made of a micro-perforated plate, specifically a perlite composite perforated sound-absorbing plate, a polyimide micro-perforated sound-absorbing composite plate, etc.

[0031] As an alternative, the capsule retaining ring 8 in this embodiment is fixed in the following way: a limiting ring groove 103 is provided at the bottom of the cavity 101. One end of the capsule retaining ring 8 is engaged with the limiting ring groove 103, and the other end is bonded and fixed to the side wall of the cavity 101. In actual installation, the plate-shaped capsule retaining ring 8 is bent into a ring shape and one end is inserted into the limiting ring groove 103, and then the other end is bonded and fixed to the side wall of the cavity 101. In other embodiments, the capsule retaining ring 8 can of course be fixed in other ways, such as being directly bonded and fixed to the side wall of the cavity 101.

[0032] In this embodiment, a sound-absorbing strip 9 is filled between the flange 4 and the side wall of the cavity 101, forming a multi-layer sound absorption and noise reduction with the inner porous sound-absorbing component 5 and the outer porous sound-absorbing component 6, further improving the sound absorption and noise reduction effect. The sound-absorbing strip 9 is annular, and the installation method is the same as that of the sealing ring 11, that is, an annular groove (not shown in the figure) is provided on the side wall of the flange 4 or the cavity 101, and the sound-absorbing strip 9 is embedded in the annular groove. The material of the sound-absorbing strip 9 is not specifically limited, such as silicone rubber, EPDM rubber, polyurethane foam, polyester fiber, etc.

[0033] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A low-noise, high-protection electromagnetic brake, comprising a stator, an armature, a rotor, and a flange, wherein one end of the stator has a cavity, and the armature, rotor, and flange are sequentially arranged within the cavity from the inside out, and the flange is fixedly connected to the stator, characterized in that, The side wall of the cavity is provided with an installation ring groove, and an inner porous sound-absorbing component is provided in the installation ring groove. An outer porous sound-absorbing component is provided at the opening of the cavity.

2. The low-noise, high-protection electromagnetic brake according to claim 1, characterized in that, The internal porous sound-absorbing component is made of flexible material.

3. The low-noise, high-protection electromagnetic brake according to claim 2, characterized in that, The inner porous sound-absorbing component has several phase change microcapsules embedded in its inner side, and the side wall of the cavity is fixedly connected with a capsule fixing ring.

4. The low-noise, high-protection electromagnetic brake according to claim 3, characterized in that, The capsule retaining ring is made of sound-absorbing material.

5. The low-noise, high-protection electromagnetic brake according to claim 3, characterized in that, The bottom of the cavity is provided with a limiting ring groove, one end of the capsule fixing ring is engaged with the limiting ring groove, and the other end is bonded and fixed to the side wall of the cavity.

6. The low-noise, high-protection electromagnetic brake according to claim 1, characterized in that, A sound-absorbing strip is filled between the flange and the side wall of the cavity.

7. The low-noise, high-protection electromagnetic brake according to any one of claims 1-6, characterized in that, The inner porous sound-absorbing component and the outer porous sound-absorbing component are made of polyester fiber cotton.

8. The low-noise, high-protection electromagnetic brake according to any one of claims 1-6, characterized in that, The external porous sound-absorbing component is bonded and fixed to the flange.

Images