Multi-coil long-distance power-off brake structure

Abstract

The invention discloses a multi-coil long-distance power-off brake structure. The multi-coil long-distance power-off brake structure comprises a base, coils, a spring, an armature and a friction plate. The base is of a disc structure with a through hole I formed in the center, a plurality of flanges are arranged on the plate face of one side of the base around the through hole I at intervals, coils are wound on the outer walls of the flanges, the length of the coils is larger than that of the flanges, and a groove is formed between each coil and the corresponding flange in a clamped mode. The armature comprises a disc with a through hole II in the center and a plurality of connecting columns which are arranged on the plate face of one side of the disc at intervals around the through hole II and embedded into the groove. A spring is wound on the outer wall of the connecting column and located between the coil and the disc. A friction plate connected with an equipment rotating shaft through a spline is arranged on the side, away from the base, of the armature. When the brake is powered on, the armature moves towards the base and is separated from the end face of the friction plate, and the braking state is relieved. When the brake is powered off, the spring ejects the armature out, the armature and the end face of the friction plate are meshed and rubbed, and the braking effect is achieved.

Description

Technical Field

[0001] The present invention relates to the field of brakes, and specifically to a multi-coil long-stroke power-off brake structure. Background Art

[0002] At present, the power-off brakes on the market generally have a non-linear coupling relationship between the actuation stroke and the braking torque: when the actuation stroke increases, the braking distance will show an exponential decay. If a high braking torque is to be maintained while increasing the stroke, it is necessary to significantly increase the geometric size of the brake, which will bring various disadvantages:

[0003] 1) In terms of physical properties, a larger mass and inertia will lead to a delay in dynamic response, increased difficulty in thermal management, resulting in thermal decay and mechanical stress concentration, increasing the risk of fatigue failure;

[0004] 2) In the application scenario, it may lead to poor adaptability due to limited installation space or weight sensitivity (such as in the automotive and aviation fields), exacerbating energy efficiency losses;

[0005] 3) Economically, the costs of materials, processing, maintenance, and transportation will increase significantly. Summary of the Invention

[0006] The purpose of the present invention is to provide a multi-coil long-stroke power-off brake structure, including a base, a coil, a spring, an armature, and a friction plate.

[0007] The base is a disc structure with a through hole Ⅰ opened in the center, and a plurality of flanges are arranged at intervals around the through hole Ⅰ on one side plate surface of the disc.

[0008] The coil is wound around the outer side 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 column.

[0010] A through hole Ⅱ is opened in the center of the disc, and a plurality of connecting columns embedded in grooves are arranged at intervals around the through hole Ⅱ on the side plate surface close to the base.

[0011] The spring is wound around the outer side wall of the connecting column, and the spring is located between the coil and the disc.

[0012] The friction plate is located on the side of the armature away from the base and is connected to the equipment rotating shaft through a spline.

[0013] Furthermore, when the brake is energized, the coil generates a magnetic field, and an electromagnetic force is generated between the base and the armature, causing the armature to move in the direction of the base, away from the friction plate, and releasing the braking state. When the brake is de-energized, the coil loses the magnetic field, the spring pushes out the armature, and the end face of the armature bites and frictions with the friction plate rotating with the rotating shaft to achieve the braking effect.

[0014] Furthermore, when the brake is powered on, the braking state of the brake is released, and the connecting column contacts the flange. When the brake is powered off, the brake is in the braking state, and there is a gap between the connecting column and the flange.

[0015] Furthermore, when the brake is powered off, the distance between the coil and the disc is greater than the distance between the connecting column and the flange.

[0016] Furthermore, the parameters of the coil are determined by the braking torque, the operating distance, and the duty cycle power-on rate during the actual working process. The parameters of the spring are determined by the braking torque and the operating distance during the actual working process.

[0017] Furthermore, the base and the armature are of an integrally formed structure or are connected by bolts.

[0018] Furthermore, the central axes of the through hole Ⅰ, the through hole Ⅱ, and the inner hole of the friction plate are on the same straight line.

[0019] Furthermore, the cross-sectional shapes of the flange and the connecting column are circular.

[0020] Furthermore, the number of the flanges is determined by the outer diameter size, the inner diameter shaft size, the braking torque, and the brake stroke of the brake.

[0021] The number of the connecting columns is the same as the number of the flanges.

[0022] Furthermore, the base is connected to the stationary end of the device.

[0023] The technical effects of the present invention are beyond doubt. The beneficial effects of the present invention are as follows:

[0024] 1. The brake of the present invention can solve the problem of maintaining the braking torque unchanged when the power-off brake increases the action stroke under the same volume. By evenly distributing the coils in the brake under the same volume, the advantages of the solenoid coil are fully utilized, the magnetic leakage is reduced, and the solenoid force is increased to achieve the goal.

[0025] 2. The brake of the present invention has a large braking action distance, a large suction force, and a large braking torque. The multi-coil suction is more balanced than the single-coil armature suction. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 is a sectional view of the structure of the multi-coil long-stroke power-off brake;

[0027] Figure 2 is a schematic diagram of the structure of the multi-coil long-stroke power-off brake.

[0028] In the figure: base 1, through hole I 101, flange 102, coil 2, spring 3, armature 4, disc 401, through hole II 4011, connecting column 402, friction plate 5, groove 6. Detailed implementation mode

[0029] The present invention will be further described below in conjunction with embodiments, but it should not be understood that the above-mentioned subject scope of the present invention is limited to the following embodiments. Without departing from the above-mentioned technical idea of the present invention, various substitutions and changes made according to ordinary technical knowledge and customary means in the art should be included within the protection scope of the present invention.

[0030] Embodiment 1:

[0031] Refer to Figure 1 、 Figure 2 , a multi-coil long-distance power-off brake structure, including a base 1, a coil 2, a spring 3, an armature 4 and a friction plate 5.

[0032] The base 1 is a disc structure with a through hole I 101 opened in the center, and a plurality of flanges 102 are arranged at intervals around the through hole I 101 on one side plate surface of the disc.

[0033] The coil 2 is wound on the outer side wall of the flange 102, 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.

[0034] The armature 4 includes a disc 401 and a connecting column 402.

[0035] A through hole II 4011 is opened in the center of the disc 401, and a plurality of connecting columns 402 embedded in the groove 6 are arranged at intervals around the through hole II 4011 on the plate surface close to the base 1 side.

[0036] The spring 3 is wound on the outer side wall of the connecting column 402, and the spring 3 is located between the coil 2 and the disc 401.

[0037] The friction plate 5 is located on the side of the armature 4 away from the base 1 and is connected to the equipment rotating shaft through a spline.

[0038] Embodiment 2:

[0039] The main structure of this embodiment is the same as that of Embodiment 1. Further, when the brake is powered on, the coil 2 generates a magnetic field, and an electromagnetic force is generated between the base 1 and the armature 4, so that the armature 4 moves in the direction of the base 1, away from the friction plate 5, and the braking state is released.

[0040] When the brake is powered off, the coil 2 loses the magnetic field, and the spring 3 ejects the armature 4, and the end face of the armature 4 bites and frictions with the friction plate 5 rotating with the rotating shaft to achieve the braking effect.

[0041] Example 3:

[0042] The main structure of this embodiment is the same as any one of Embodiments 1 to 2. Further, when the brake is energized, the braking state of the brake is released, and the connecting column 402 contacts the flange 102.

[0043] When the brake is de-energized, the brake is in the braking state, and there is a gap between the connecting column 402 and the flange 102.

[0044] Example 4:

[0045] The main structure of this embodiment is the same as any one of Embodiments 1 to 3. Further, when the brake is de-energized, the distance between the coil 2 and the disc 401 is greater than the distance between the connecting column 402 and the flange 102.

[0046] Example 5:

[0047] The main structure of this embodiment is the same as any one of Embodiments 1 to 4. Further, the parameters of the coil 2 are determined by the braking torque, the movement distance, and the duty cycle power-on rate during the actual working process. The parameters of the spring 3 are determined by the braking torque and the movement distance during the actual working process.

[0048] Example 6:

[0049] The main structure of this embodiment is the same as any one of Embodiments 1 to 5. Further, the base 1 and the armature 4 are integrally formed structures or are connected by bolts.

[0050] Example 7:

[0051] The main structure of this embodiment is the same as any one of Embodiments 1 to 6. Further, the central axes of the through hole Ⅰ101, the through hole Ⅱ4011, and the inner hole of the friction plate 5 are on the same straight line.

[0052] Example 8:

[0053] The main structure of this embodiment is the same as any one of Embodiments 1 to 7. Further, the cross-sectional shapes of the flange 102 and the connecting column 402 are circular.

[0054] Example 9:

[0055] The main structure of this embodiment is the same as any one of Embodiments 1 to 8. Further, the number of the flanges 102 is determined by the outer diameter size, the inner diameter shaft size, the braking torque, and the brake stroke (the distance between the connecting column 402 and the flange 102) of the brake.

[0056] The number of the connecting columns 402 is the same as the number of the flanges 102.

[0057] Example 10:

[0058] The main structure of this embodiment is the same as any one of Embodiments 1-9. Further, the base 1 is connected to the stationary end of the device.

[0059] Embodiment 11:

[0060] The main structure of this embodiment is the same as any one of Embodiments 1-10. Further, the main body structure of this mechanism consists of several parts such as the base 1, the coil 2, the spring 3, the armature 4, and the friction plate 5 in the schematic diagram.

[0061] First step, 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. The suction force overcomes the spring force of the spring 3, causing the armature 4 to move towards the base 1. The armature 4 is attracted to the end face of the base 1. The armature 4 is disengaged from the end face of the friction plate 5, releasing the braking state.

[0062] Second step, when the brake is de-energized, the coil 2 loses the magnetic field, and the spring 3 quickly pushes out the armature 4. The armature 4 engages and frictions with the end face of the friction plate 5 rotating with the shaft, achieving the braking effect.

[0063] The friction plate 5 in the schematic diagram is connected to the rotating shaft end of the device through a spline. The base 1 is fixed to the stationary end of the device.

[0064] Third step, in the de-energized state of the brake, after the armature 4 engages with the end face of the friction plate 5, when the torque of the rotating shaft is lower than the braking torque, it cannot rotate, achieving the braking and fixing state.

[0065] Among them, the coil parameters of the coil 2 are matched according to the braking torque, operating distance, duty cycle power-on rate, etc. of the actual use system.

[0066] Among them, the spring parameters of the spring 3 are matched according to the braking torque, operating distance, etc. of the actual use system.

[0067] Principle description: Under the condition of a large operating distance, utilize the advantages of the solenoid coil: 1. The solenoid coil has less magnetic leakage. 2. The magnetic density in the air gap between the armatures is high. 3. The suction force is the resultant force of the suction force on the armature end face and the solenoid force.

Claims

1. A multi-coil long-distance power-off brake structure, characterized in that: It includes 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) opened at the center. On one side plate surface of the disc, a number of flanges (102) are arranged at intervals around the through hole Ⅰ (101); The coil (2) is wound on the outer side 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); The armature (4) includes a disc (401) and a connecting column (402); A through hole Ⅱ (4011) is opened at the center of the disc (401). And on the side plate surface close to the base (1), a number of connecting columns (402) that are embedded in the groove (6) are arranged at intervals around the through hole Ⅱ (4011); The spring (3) is wound on the outer side wall of the connecting column (402). 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 to the equipment rotating shaft through a spline.

2. The structure of a multi-coil long-distance power-off brake according to claim 1, characterized in that: When the brake is powered on, 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 releasing the braking state; When the brake is powered off, the coil (2) loses the magnetic field, and the spring (3) pushes out the armature (4). The end face of the armature (4) bites and frictions with the friction plate (5) that rotates with the rotating shaft to achieve the braking effect.

3. A multi-coil long-distance power-off brake structure according to claim 1, characterized in that: When the brake is powered on, the brake releases the braking state, and the connecting column (402) contacts the flange (102). When the brake is powered off, the brake is in the braking state, and there is a gap between the connecting column (402) and the flange (102).

4. A multi-coil long-distance power-off brake structure according to claim 1, characterized in that: When the brake is powered off, the distance between the coil (2) and the disc (401) is greater than the distance between the connecting column (402) and the flange (102).

5. A multi-coil long-distance power-off brake structure according to claim 1, characterized in that: The parameters of the coil (2) are determined by the braking torque, the operating distance and the duty cycle power-on rate in the actual working process; the parameters of the spring (3) are determined by the braking torque and the operating distance in the actual working process.

6. A multi-coil long-distance power-off brake structure according to claim 1, characterized in that: The base (1) and the armature (4) are of an integrally formed structure or are connected by bolts.

7. A multi-coil long-distance power-off brake structure according to claim 1, characterized in that: The central axes of the through hole Ⅰ (101), the through hole Ⅱ (4011) and the inner hole of the friction plate (5) are on the same straight line.

8. A multi-coil long-distance power-off brake structure according to claim 1, characterized in that: The cross-sectional shapes of the flange (102) and the connecting column (402) are circular.

9. A multi-coil long-distance power-off brake structure according to claim 1, characterized in that: The number of the flanges (102) is determined by the outer diameter size of the brake, the inner diameter shaft size, the braking torque and the brake stroke. The number of the connecting columns (402) is the same as the number of the flanges (102).

10. A multi-coil long-distance power-off brake structure according to claim 1, characterized in that: The base (10) is connected to the stationary end of the equipment.

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