Low-noise electromagnetic brake

Abstract

The low-noise electromagnetic brake comprises a magnet yoke and a brake sleeve which are oppositely arranged, an armature is arranged on one side of the magnet yoke, the armature is connected with the magnet yoke through a brake spring, a friction disc is arranged in the brake sleeve, an electromagnetic coil is arranged on the side, away from the friction disc, of the armature, and the electromagnetic coil is connected with the magnet yoke. An installation groove used for installing the electromagnetic coil is formed in the magnet yoke, the brake sleeve is arranged on the outer side of the magnet yoke in a sleeving mode, sound insulation cotton is connected between the side wall of the brake sleeve and the magnet yoke, a radiator is arranged on the side, away from the friction disc, of the armature in an attached mode, and an assembly groove is formed in the brake sleeve. A heat dissipation hole penetrating through the brake sleeve and the assembly groove is formed in the rear side of the friction disc. According to the utility model, the radiating box, the radiator and the radiating holes are arranged, so that the mutually rubbed armatures simultaneously conduct heat outwards, the reduction of the temperature between the contact surfaces of the armatures and the friction disc is accelerated, the serious loss caused by overheating of the armatures and the friction disc is effectively prevented, and the service life is prolonged.

Description

Technical Field

[0001] This utility model relates to the field of electromagnetic brake technology, and in particular to a low-noise electromagnetic brake. Background Technology

[0002] An existing patent (publication number: CN220646574U) discloses a low-noise electromagnetic brake. This invention uses an annular mounting groove on the magnetic yoke, and an annular stop block is slidably mounted in the groove via an elastic element. The elastic element provides elastic buffering for the armature, preventing the armature from impacting the magnetic yoke with a large force, thus reducing the rigid impact of the armature on the magnetic yoke and lowering the noise during brake operation. However, in practical applications, noise is not mainly generated by impact, but rather by friction. When the shaft rotates, it causes strong friction between the armature and the friction pads and brake disc assembly, resulting in loud noise. Furthermore, frequent start-stop operations or prolonged high-load operation can easily lead to mechanical wear of key components such as the friction pads, armature, and brake disc assembly due to overheating, shortening their service life. Therefore, we propose a low-noise electromagnetic brake. Utility Model Content

[0003] To address the aforementioned problems, this invention provides a low-noise electromagnetic brake.

[0004] To achieve the above objectives, this utility model provides the following technical solution:

[0005] A low-noise electromagnetic brake is designed, comprising a magnetic yoke and a brake sleeve arranged opposite to each other. An armature is provided on one side of the magnetic yoke and is connected to the magnetic yoke by a brake spring. A friction disc is installed inside the brake sleeve. An electromagnetic coil is provided on the side of the armature away from the friction disc. A mounting groove for installing the electromagnetic coil is opened inside the magnetic yoke. The brake sleeve is fitted on the outside of the magnetic yoke. Sound insulation cotton is connected between the side wall of the brake sleeve and the magnetic yoke. A heat sink is attached to the side of the armature away from the friction disc. An assembly groove is opened on the brake sleeve. A heat dissipation hole penetrating the brake sleeve and the assembly groove is provided on the rear side of the friction disc.

[0006] In the above scheme, the armature is covered with a wear-resistant layer one on the side away from the yoke, and a connecting groove is provided on the side of the friction disk near the armature. A wear-resistant layer two that fits the wear-resistant layer one is laid in the connecting groove.

[0007] In the above scheme, the magnetic yoke has an installation groove adapted to the braking spring.

[0008] In the above scheme, the inner wall of the brake sleeve is provided with an embedding groove adapted to the sound insulation cotton, and the thickness of the sound insulation cotton is not less than the depth of the embedding groove.

[0009] In the above scheme, both the first wear-resistant layer and the second wear-resistant layer are polyurethane.

[0010] In the above scheme, a flange is installed on the side of the magnetic yoke away from the brake sleeve, and a heat dissipation box with open ends is fixed inside the flange. The heat dissipation radiator is fixed to the inner wall of the heat dissipation box, and a dustproof component is also provided inside the heat dissipation box.

[0011] In the above solution, the dustproof component includes a dustproof mesh plate that opens and closes from top to bottom. Two pairs of mounting plates are fixed inside the heat dissipation box. An assembly plate is fixed at one end of each dustproof mesh plate away from each other. The end of the assembly plate is connected to the mounting plate through a rotating shaft. A torsion spring is sleeved on the rotating shaft, with its two ends connected to the mounting plate and the assembly plate respectively.

[0012] The advantages and beneficial effects of this utility model are as follows: By setting up a heat dissipation box, a heat sink, and heat dissipation holes, the heat dissipation box is used to fix the heat sink, making it completely in contact with the armature, thereby conducting the heat generated by the friction of the armature. At the same time, the heat dissipation holes are used to conduct the heat generated by the friction of the friction disc outward. Compared with the prior art, the armatures that are rubbing against each other conduct heat outward simultaneously, which accelerates the temperature reduction between the contact surfaces of the armature and the friction disc, effectively preventing serious wear and tear on the armature and friction disc due to overheating, and extending the service life. By setting up a dustproof component, a dustproof mesh plate is used to filter dust in the outside air, preventing dust from entering the yoke and adhering to the surface of the armature, thus ensuring the heat dissipation area. Compared with the prior art, by using the elasticity of the torsion spring, when the dustproof mesh plate is impacted by the external airflow, the dustproof mesh plate will rotate towards the side closer to the heat sink under the action of the mounting plate, thereby closing the upper and lower dustproof mesh plates, fully filtering the external airflow, and achieving a good dustproof effect. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 This is a schematic diagram of the structure of a low-noise electromagnetic brake proposed in this utility model;

[0015] Figure 2 This is a cross-sectional view of a low-noise electromagnetic brake proposed in this utility model;

[0016] Figure 3 This is a schematic diagram of the dustproof component of a low-noise electromagnetic brake proposed in this utility model.

[0017] In the diagram: 1. Flange; 2. Magnetic yoke; 3. Armature; 4. Brake sleeve; 5. Friction disc; 6. Bolt; 7. Mounting groove; 8. Electromagnetic coil; 9. Mounting groove; 10. Brake spring; 11. Embedding groove; 12. Sound insulation cotton; 13. Wear-resistant layer one; 14. Connecting groove; 15. Wear-resistant layer two; 16. Assembly groove; 17. Heat dissipation hole; 18. Heat dissipation box; 19. Radiator; 20. Dustproof component; 201. Dustproof mesh plate; 202. Assembly plate; 203. Rotating shaft; 204. Torsion spring; 205. Mounting plate. Detailed Implementation

[0018] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings and examples. The following examples are only used to more clearly illustrate the technical solution of this utility model and should not be construed as limiting the scope of protection of this utility model.

[0019] Please see Figure 1-3 This utility model provides a technical solution: a low-noise electromagnetic brake, including a magnetic yoke 2 and a brake sleeve 4 arranged opposite to each other, an armature 3 is provided on one side of the magnetic yoke 2, and the armature 3 is connected to the magnetic yoke 2 through a brake spring 10;

[0020] Furthermore, the magnetic yoke 2 has an installation groove 9 that is adapted to the brake spring 10; spring seats are installed on both sides of the spring 10, and the spring seats are respectively connected to the inner wall of the installation groove 9 and the armature 3.

[0021] The brake sleeve 4 is equipped with a friction disc 5. The armature 3 is provided with an electromagnetic coil 8 on the side away from the friction disc 5. The magnetic yoke 2 is provided with a mounting groove 7 for installing the electromagnetic coil 8. The brake sleeve 4 is fitted on the outside of the magnetic yoke 2. The side wall of the brake sleeve 4 is connected to the magnetic yoke 2 with sound insulation cotton 12. The sound insulation cotton 12 is arranged around the brake sleeve 4.

[0022] Furthermore, the inner wall of the brake sleeve 4 is provided with an embedding groove 11 that is adapted to the sound insulation cotton 12. The thickness of the sound insulation cotton 12 is not less than the depth of the embedding groove 11. Since the sound insulation cotton 12 is a soft material, it is easily compressed. To prevent the sound insulation cotton from failing to fully fill the embedding groove 11 after compression, the thickness of the sound insulation cotton 12 is set to be greater to prevent gaps from affecting the sound insulation effect.

[0023] A heat sink 19 is attached to the side of the armature 3 away from the friction disk 5. The heat sink 19 is a commonly used heat sink on PCB boards. It is made of aluminum and aluminum alloy to improve thermal conductivity.

[0024] Furthermore, a flange 1 is installed on the side of the magnetic yoke 2 away from the brake sleeve 4. The flange 1 has mounting holes on its edge. A heat sink box 18 with openings at both ends is fixed inside the flange 1, into which the magnetic yoke 2 is inserted. The heat sink 19 is fixed to the inner wall of the heat sink box 18 to improve the installation stability of the heat sink 18. The heat sink box 18 is also equipped with a dustproof component 20 to prevent dust from entering and adhering to the surface of the armature 3, thereby reducing the heat dissipation area and ensuring that the heat conduction efficiency is not affected, thus promoting heat dissipation.

[0025] Furthermore, such as Figure 2 As shown, the dustproof assembly 20 includes a dustproof mesh plate 201 that opens and closes vertically. Two pairs of mounting plates 205 are fixed inside the heat dissipation box 18. An assembly plate 202 is fixed at one end of the dustproof mesh plate 201 away from each other. The end of the assembly plate 202 is connected to the mounting plate 205 through a rotating shaft 203. A torsion spring 204 is sleeved on the rotating shaft 203, with its two ends connected to the mounting plate 205 and the assembly plate 202 respectively. As shown, the torsion spring 204 is currently in its natural state. When the airflow from the outside hits the dustproof mesh plate 201, the dustproof mesh plate 201 rotates. At this time, the torsion spring 204 is compressed by pressure. When the outside airflow stops, the dustproof mesh plate 201 will return to its original position under the action of the elastic force of the torsion spring 204, so as to avoid affecting the heat dissipation of the armature 3, leave sufficient space for the heat dissipation of the armature 3, and improve the heat dissipation effect.

[0026] Specifically, by setting up a dustproof component 20 and using a dustproof mesh plate 201, dust in the outside air is filtered to prevent dust from entering the yoke and adhering to the surface of the armature 3, thus ensuring the heat dissipation area. Compared with the prior art, by using the elastic force of the torsion spring 204, when the dustproof mesh plate 201 is impacted by the external airflow, the dustproof mesh plate 201 will rotate towards the side closer to the radiator 19 under the drive of the mounting plate 202, thereby closing the upper and lower dustproof mesh plates 201, fully filtering the external airflow, and achieving a good dustproof effect.

[0027] The brake sleeve 4 has an assembly groove 16 for connecting the drive shaft. The friction disc 5 has a heat dissipation hole 17 that passes through the brake sleeve 4 and the assembly groove 16. The heat dissipation hole 17 increases the way for the friction disc 5 to exchange heat with the external environment and improves the heat dissipation effect.

[0028] Specifically, by setting up a heat dissipation box 18, a heat sink 19, and heat dissipation holes 17, the heat dissipation box 18 is used to fix the heat sink 19 so that it is completely in contact with the armature 3, thereby conducting the heat generated by the friction of the armature 3. At the same time, the heat dissipation holes 17 are used to conduct the heat generated by the friction of the friction disc 5 outward. Compared with the prior art, the armature 3, which rubs against each other, conducts heat outward at the same time, which speeds up the temperature reduction between the contact surfaces of the armature 3 and the friction disc 5, effectively preventing the armature 3 and the friction disc 5 from being seriously worn due to overheating, and extending their service life.

[0029] Furthermore, the armature 3 is covered with a wear-resistant layer 13 on the side away from the yoke 2, and the friction disk 5 is provided with a connecting groove 14 on the side close to the armature 3. A wear-resistant layer 15 that fits the wear-resistant layer 13 is laid in the connecting groove 14.

[0030] Specifically, in practical applications, when the vehicle brakes, the electromagnetic coil 8 is de-energized, at which point the brake spring 10 returns to its original length, compared to... Figure 2 The medium length is longer. Figure 2 When the brake spring 10 is in the contracted state, the armature 3 is close to the friction disc 5, and in conjunction with the wear-resistant layer 13 and the wear-resistant layer 2 15, it replaces the armature 3 in contact with the friction disc 5. The wear-resistant layer 13 and the wear-resistant layer 2 15 enhance wear resistance and extend service life.

[0031] Furthermore, both wear-resistant layer 13 and wear-resistant layer 25 are made of polyurethane, which has better wear resistance than ordinary rubber, making it beneficial for practical applications.

[0032] Specifically, although this utility model will cause the armature 3 and the friction disc 5 to generate strong friction, the sound insulation cotton 12 can effectively improve the sound insulation effect and reduce the working noise. In addition, the design of the heat sink 19 and the heat dissipation hole 17 effectively improves the heat dissipation capacity of this utility model, effectively prevents the contact parts from overheating and causing mechanical wear, extends the service life, and improves the practicality.

[0033] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A low-noise electromagnetic brake, comprising a magnetic yoke (2) and a brake sleeve (4) disposed opposite to each other, characterized in that, The magnetic yoke (2) has an armature (3) on one side, which is connected to the magnetic yoke (2) via a brake spring (10). The brake sleeve (4) is equipped with a friction disc (5). The armature (3) is equipped with an electromagnetic coil (8) on the side away from the friction disc (5). The magnetic yoke (2) has an installation groove (7) for installing the electromagnetic coil (8). The brake sleeve (4) is fitted on the outside of the magnetic yoke (2). The side wall of the brake sleeve (4) is connected to the magnetic yoke (2) with sound insulation cotton (12). The armature (3) is fitted with a radiator (19) on the side away from the friction disc (5). The brake sleeve (4) has an assembly groove (16). The friction disc (5) has a heat dissipation hole (17) that penetrates the brake sleeve (4) and the assembly groove (16) on the rear side.

2. The low-noise electromagnetic brake according to claim 1, characterized in that, The armature (3) is covered with a wear-resistant layer one (13) on the side away from the yoke (2), and the friction disc (5) is provided with a connecting groove (14) on the side close to the armature (3). The connecting groove (14) is filled with a wear-resistant layer two (15) that fits the wear-resistant layer one (13).

3. A low-noise electromagnetic brake according to claim 1, characterized in that, The magnetic yoke (2) has an installation groove (9) that is compatible with the brake spring (10).

4. A low-noise electromagnetic brake according to claim 1, characterized in that, The inner wall of the brake sleeve (4) is provided with an embedding groove (11) that is adapted to the sound insulation cotton (12), and the thickness of the sound insulation cotton (12) is not less than the depth of the embedding groove (11).

5. A low-noise electromagnetic brake according to claim 2, characterized in that, Both wear-resistant layer one (13) and wear-resistant layer two (15) are made of polyurethane.

6. A low-noise electromagnetic brake according to claim 1, characterized in that, A flange (1) is installed on the side of the magnetic yoke (2) away from the brake sleeve (4). A heat sink box (18) with the magnetic yoke (2) inserted and open at both ends is fixed inside the flange (1). The radiator (19) is fixed to the inner wall of the heat sink box (18). A dustproof component (20) is also provided inside the heat sink box (18).

7. A low-noise electromagnetic brake according to claim 6, characterized in that, The dustproof assembly (20) includes a dustproof mesh plate (201) that opens and closes vertically. Two pairs of mounting plates (205) are fixed inside the heat dissipation box (18). An assembly plate (202) is fixed at one end of each dustproof mesh plate (201) away from each other. The end of the assembly plate (202) is connected to the mounting plate (205) through a rotating shaft (203). A torsion spring (204) is sleeved on the rotating shaft (203) and its two ends are respectively connected to the mounting plate (205) and the assembly plate (202).

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