Multi-coil long-distance power-off brake structure
By using a multi-coil long-distance power-off brake structure, the problem of brake torque attenuation when the brake stroke is increased is solved, and the brake torque can be maintained while increasing the stroke within the same volume, thus adapting to the application requirements of space-constrained scenarios.
Patent Information
- Application Number
- CN202520909759.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-09
- Publication Date
- 2026-03-06
- Estimated Expiration
- 2035-05-09
AI Technical Summary
Existing power failure brakes exhibit an exponential decrease in braking torque when the actuation stroke is increased. Furthermore, increasing the brake size leads to dynamic response delay, increased difficulty in thermal management, mechanical stress concentration, and higher economic costs, resulting in poor adaptability, especially in space-constrained or weight-sensitive applications.
The multi-coil long-distance power-off brake structure is adopted. By evenly distributing coils on the base, the advantages of solenoid coils are utilized to increase the stroke and maintain the braking torque. Combined with spring parameters and armature design, the brake can effectively brake in the power-off state.
While maintaining the same braking torque, the brake stroke is increased within the same volume, thus reducing magnetic leakage, increasing braking distance and engagement force, reducing mechanical stress and economic costs, and adapting to space-constrained scenarios.
Smart Images
Figure CN223975459U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of brakes, specifically a multi-coil long-distance power-off brake structure. Background Technology
[0002] Currently, most power-off brakes on the market exhibit a non-linear coupling relationship between travel and braking torque: as the travel increases, the braking distance decreases exponentially. To increase the travel while maintaining high braking torque, the brake's geometry needs to be significantly increased, but this brings several drawbacks.
[0003] 1) In terms of physical performance, greater mass and inertia will lead to delayed dynamic response, increased difficulty in thermal management, thermal decay and mechanical stress concentration, and increased risk of fatigue failure;
[0004] 2) In application scenarios, poor adaptability may result from limited installation space or weight sensitivity (such as in the automotive and aerospace fields), which may exacerbate energy efficiency losses.
[0005] 3) On the economic level, the costs of materials, processing, maintenance and transportation have increased significantly. Utility Model Content
[0006] The purpose of this utility model is to provide a multi-coil long-distance power-off brake structure, including a base, coils, springs, armatures, and friction plates.
[0007] The base is a disc structure with a through hole I in the center, and several flanges are provided at intervals around the through hole I on one side plate of the disc.
[0008] A coil is wound around the outer wall of the flange, and the length of the coil is greater than the length of the flange, so that a groove is formed between the coil and the flange.
[0009] The armature includes a disc and a connecting post.
[0010] The disk has a through hole II at its center, and several connecting posts with embedded grooves are arranged around the through hole II on the plate surface near the base.
[0011] A spring is wound around the outer wall of the connecting column, and the spring is located between the coil and the disk.
[0012] The friction plate is located on the side of the armature away from the base and is connected to the rotating shaft of the device via a spline.
[0013] Furthermore, when the brake is energized, it is in a non-braking state, with the connecting post in contact with the flange; when the brake is de-energized, it is in a braking state, with a gap between the connecting post and the flange.
[0014] Furthermore, when the brake is de-energized, the distance between the coil and the disk is greater than the distance between the connecting post and the flange.
[0015] Furthermore, the parameters of the coil are determined by the braking torque, operating distance, and operating energization rate during actual operation. The parameters of the spring are determined by the braking torque and operating distance during actual operation.
[0016] Furthermore, the base and armature are integrally formed.
[0017] Furthermore, the central axis of through hole I, the central axis of through hole II, and the central axis of the inner hole of the friction plate are on the same straight line.
[0018] Furthermore, the cross-sectional shape of the flange and connecting post is circular.
[0019] Furthermore, the number of flanges is determined by the outer diameter of the brake, the inner diameter shaft size, the braking torque, and the brake stroke.
[0020] The number of connecting posts is the same as the number of flanges.
[0021] Furthermore, the base is connected to the stationary end of the device.
[0022] The technical effects of this utility model are undeniable, and its beneficial effects are as follows:
[0023] 1. The brake of this utility model can maintain a constant braking torque while increasing the actuation stroke of the brake in the same volume. By distributing and evenly placing the coils inside the brake within the same volume, the advantages of the solenoid coil are fully utilized, leakage flux is reduced, and the solenoid force is increased to achieve the goal.
[0024] 2. The brake of this invention has a large braking distance, large attraction force, and large braking torque. The multi-coil attraction is more balanced than the single-coil armature attraction. Attached Figure Description
[0025] Figure 1 A cross-sectional view of the structure of a multi-coil long-pitch power-off brake;
[0026] Figure 2 This is a schematic diagram of a multi-coil long-distance power-off brake structure.
[0027] In the diagram: base 1, through hole I 101, flange 102, coil 2, spring 3, armature 4, disc 401, through hole II 4011, connecting post 402, friction plate 5, groove 6. Detailed Implementation
[0028] The present invention will be further described below with reference to embodiments, but it should not be construed as the scope of the present invention being limited to the following embodiments. Various substitutions and modifications made based on ordinary technical knowledge and conventional methods in the art without departing from the above-described technical concept of the present invention should be included within the protection scope of the present invention.
[0029] Example 1:
[0030] See Figure 1 , Figure 2 A multi-coil long-distance power-off brake structure includes a base 1, a coil 2, a spring 3, an armature 4, and a friction plate 5.
[0031] The base 1 is a disc structure with a through hole I101 in the center, and a number of flanges 102 are provided at intervals around the through hole I101 on one side plate of the disc.
[0032] A coil 2 is wound on the outer wall of the flange 102. The length of the coil 2 is greater than the length of the flange 102, so that a groove 6 is formed between the coil 2 and the flange 102.
[0033] The armature 4 includes a disc 401 and a connecting post 402.
[0034] The disk 401 has a through hole II 4011 at its center, and a number of connecting posts 402 with embedded grooves 6 are arranged around the through hole II 4011 on the plate surface near the base 1.
[0035] A spring 3 is wound around the outer wall of the connecting post 402, and the spring 3 is located between the coil 2 and the disk 401.
[0036] The friction plate 5 is located on the side of the armature 4 away from the base 1 and is connected to the rotating shaft of the equipment via a spline.
[0037] Example 2:
[0038] The main structure of this embodiment is the same as that of embodiment 1. Furthermore, when the brake is energized, the coil 2 generates a magnetic field, and an electromagnetic force is generated between the base 1 and the armature 4, causing the armature 4 to move in the direction of the base 1, away from the friction plate 5, and release the braking state.
[0039] When the brake is de-energized, coil 2 loses its magnetic field, spring 3 pushes armature 4 out, and armature 4 engages and rubs with the end face of friction plate 5 which rotates with the rotating shaft to achieve the braking effect.
[0040] Example 3:
[0041] The main structure of this embodiment is the same as any one of embodiments 1 to 2. Furthermore, when the brake is energized, the brake is released from its braking state, and the connecting post 402 contacts the flange 102.
[0042] When the brake is de-energized, the brake is in the braking state, and there is a gap between the connecting post 402 and the flange 102.
[0043] Example 4:
[0044] The main structure of this embodiment is the same as any one of embodiments 1 to 3. Furthermore, when the brake is de-energized, the distance between the coil 2 and the disk 401 is greater than the distance between the connecting post 402 and the flange 102.
[0045] Example 5:
[0046] The main structure of this embodiment is the same as any one of embodiments 1 to 4. Furthermore, the parameters of the coil 2 are determined by the braking torque, operating distance, and working energization rate during actual operation. The parameters of the spring 3 are determined by the braking torque and operating distance during actual operation.
[0047] Example 6:
[0048] The main structure of this embodiment is the same as any one of embodiments 1 to 5. Furthermore, the base 1 and armature 4 (disc 401 and connecting post 402) are integrally formed or bolted together.
[0049] Example 7:
[0050] The main structure of this embodiment is the same as any one of embodiments 1 to 6. Furthermore, the central axis of the through hole I 101, the central axis of the through hole II 4011, and the central axis of the inner hole of the friction plate 5 are on the same straight line.
[0051] Example 8:
[0052] The main structure of this embodiment is the same as any one of embodiments 1 to 7. Furthermore, the cross-sectional shape of the flange 102 and the connecting column 402 is circular.
[0053] Example 9:
[0054] The main structure of this embodiment is the same as any one of embodiments 1 to 8. Furthermore, the number of flanges 102 is determined by the outer diameter of the brake, the inner diameter shaft size, the braking torque, and the brake stroke (the distance between the connecting post 402 and the flange 102).
[0055] The number of connecting posts 402 is the same as the number of flanges 102.
[0056] Example 10:
[0057] The main structure of this embodiment is the same as any one of embodiments 1 to 9. Furthermore, the base 1 is connected to the stationary end of the device.
[0058] Example 11:
[0059] The main structure of this embodiment is the same as any one of embodiments 1 to 10. Furthermore, the main structure of this mechanism consists of several parts, such as the base 1, coil 2, spring 3, armature 4, and friction plate 5 shown in the schematic diagram.
[0060] In the first step, when the brake is energized, coil 2 generates a magnetic field, which in turn generates an electromagnetic force between base 1 and armature 4. This attraction overcomes the spring force of spring 3, causing armature 4 to move towards base 1. Armature 4 then attracts to the end face of base 1. Finally, armature 4 disengages from the end face of friction plate 5, releasing the braking state.
[0061] In the second step, when the brake is de-energized, coil 2 loses its magnetic field, and spring 3 quickly pushes armature 4 out. Armature 4 engages and rubs with the end face of friction plate 5, which rotates with the shaft, to achieve the braking effect.
[0062] The friction plate 5 in the schematic diagram is connected to the rotating shaft end of the equipment via a spline. The base 1 is fixed to the stationary end of the equipment.
[0063] Third, when the brake is de-energized, after the armature 4 engages with the end face of the friction plate 5, the torque of the rotating shaft is lower than the braking torque, so it cannot rotate and achieves a braking and fixing state.
[0064] The parameters of coil 2 are matched according to the braking torque, operating distance, and duty cycle of the actual system.
[0065] The spring parameters for spring 3 are matched according to the braking torque, action distance, etc. of the actual system in use.
[0066] Principle Explanation: Under conditions of large operating distance, the advantages of solenoid coils are utilized: 1. Low magnetic leakage of solenoid coils. 2. High magnetic flux density between armatures. 3. The attraction force is the resultant force of the attraction force at the armature end face and the solenoid force.
Claims
1. A multi-coil long-pitch loss-of-field brake structure, characterized by: It comprises a base (1), a coil (2), a spring (3), an armature (4) and a friction plate (5). The base (1) is a disc structure with a through hole I (101) in the center, and a plurality of flanges (102) are arranged on one side of the disc around the through hole I (101). The outer side wall of the flange (102) is wound with a coil (2), and the length of the coil (2) is greater than the length of the flange (102), so that a groove (6) is formed between the coil (2) and the flange (102). The armature (4) comprises a disc (401) and a connecting column (402). The disc (401) is provided with a through hole II (4011) in the center, and a plurality of connecting columns (402) are arranged on the side surface of the disc (401) around the through hole II (4011) and embedded in the groove (6). The outer side wall of the connecting column (402) is wound with a spring (3), and the spring (3) is located between the coil (2) and the disc (401). The friction plate (5) is located on the side of the armature (4) away from the base (1) and is connected with the rotating shaft of the device through the spline.
2. A multi-coil long-pitch de-energizing brake structure according to claim 1, characterized in that: When the brake is in the energized state, it is in the non-braking state, and the connecting column (402) is in contact with the flange (102). When the brake is in the de-energized state, it is in the braking state, and there is a gap between the connecting column (402) and the flange (102).
3. A multi-coil long-pitch de-energizing brake structure according to claim 1, characterized in that: When the brake is in the de-energized state, the distance between the coil (2) and the disc (401) is greater than the distance between the connecting column (402) and the flange (102).
4. A multi-coil long-pitch de-energizing brake structure according to claim 1, characterized by: The parameters of the coil (2) are determined by the braking torque, the action distance and the working power-on rate in the actual working process; the parameters of the spring (3) are determined by the braking torque and the action distance in the actual working process.
5. A multi-coil long-pitch de-energizing brake structure according to claim 1, characterized in that: The base (1) and the armature (4) are integrally formed.
6. A multi-coil long-pitch de-energizing brake structure according to claim 1, characterized in that: The central axis of the through hole I (101), the central axis of the through hole II (4011) and the central axis of the inner hole of the friction plate (5) are on the same straight line.
7. A multi-coil long-pitch de-energizing brake structure according to claim 1, characterized in that: The cross-sectional shape of the flange (102) and the connecting column (402) is circular.
8. A multi-coil long-pitch de-energizing brake structure according to claim 1, characterized by: The number of the flanges (102) is determined by the outer diameter of the brake, the inner diameter of the shaft, the braking torque and the stroke of the brake. The number of the connecting columns (402) is consistent with the number of the flanges (102).
9. A multi-coil long-pitch loss-of-field brake structure according to claim 1, wherein: The base (1) is connected with the stationary end of the device.