A fast response large torque electromagnetic brake and control method

Abstract

The application discloses a kind of quick response's big moment electromagnetic brake and control method, including magnetic shell and with magnetic shell corresponding combination bottom plate, magnetic shell is rotatably installed with friction rotor with bottom plate, friction rotor has friction brake disc, movable mounting is carried out between the friction brake disc of friction rotor with the end surface of magnetic shell, the armature is installed in the inside of magnetic shell and is connected with torque spring;Bottom plate end surface and the friction brake disc between friction rotor have baffle, reset spring is installed in the inside of bottom plate and is connected with baffle;Magnetic shell inside is installed with the electromagnetic coil corresponding with armature, the friction brake disc of friction rotor is placed between armature and baffle.This application can output greater brake torque under the condition that the volume of electromagnetic coil is unchanged and give consideration to the response time of quick braking;Or realize quick opening under the condition that torque is unchanged;And give consideration to certain rotor anti-misoperation function.

Description

Technical Field

[0001] This invention relates to the field of mechanical transmission and braking technology, and in particular to a fast-response high-torque electromagnetic brake and its control method. Background Technology

[0002] Electromagnetic brakes, with their compact structure, convenient assembly, controllable response, and strong adaptability, are widely used in various industrial mechanical transmission scenarios, including machine tools, hoisting machinery, conveying equipment, and automated transmission systems. They primarily function to achieve core functions such as equipment stopping braking, running locking, and overload protection, serving as a crucial foundational component for ensuring the stable and safe operation of mechanical transmission systems. Currently, most mainstream traditional electromagnetic brakes on the market employ a single spring or a single set of springs with unilateral pressure braking structure. Their core working principle is as follows: Under braking conditions, the elastic thrust of a single spring or spring group pushes the brake armature and friction rotor axially, causing the friction pair to fit tightly together. This frictional torque achieves braking and locking of the mechanical transmission system. When the equipment needs to release the brake and resume operation, the electromagnetic coil is energized to generate electromagnetic attraction. This electromagnetic force overcomes the elastic reaction force of the spring, pulling the armature back to its original position, separating the friction pair, thus releasing the brake and allowing normal equipment transmission. This structure is mature in design, has low manufacturing costs, and simple assembly processes, and has long been widely used in braking equipment under various conventional operating conditions.

[0003] However, long-term engineering applications and testing have revealed unavoidable technical contradictions in the traditional single-sided spring-applied electromagnetic brake structure, making it difficult to meet the demands of high-end, high-precision, and high-dynamic-response industrial transmission scenarios. Specific technical problems are as follows: First, the maximum braking torque of the brake directly depends on the elastic thrust of the spring. To meet the requirements of heavy-load, high-load braking conditions and increase the brake's limiting torque, the spring preload must be increased or a larger spring assembly must be used. With increased spring force, the reverse resistance that the electromagnetic coil needs to overcome during the brake release phase also increases significantly. To successfully counteract the spring force and complete the armature reset and unlocking, existing technologies can only be optimized in two ways: First, increase the wire diameter, number of turns, and overall volume of the electromagnetic coil to enhance electromagnetic attraction. This method directly increases the overall structural size, weight, and power consumption of the brake, which is inconsistent with the development trend of miniaturization, lightweighting, and energy saving, and also increases the manufacturing cost. Second, keep the electromagnetic coil parameters unchanged and rely on the original electromagnetic attraction to overcome the increased spring resistance. This method directly leads to a slower armature reset speed, a significantly longer response time for the brake to open, and a significant lag in brake release, seriously affecting the operating accuracy and dynamic response performance of the mechanical transmission system, and easily causing problems such as equipment start-stop jamming and positioning deviation. Secondly, to ensure the brake's rapid response characteristics and shorten the energized unlocking response time, the spring elastic resistance needs to be reduced to ensure that the electromagnetic coil can quickly overcome the spring force and complete the brake release. However, with the spring force limited, the maximum braking torque that the brake can output is significantly reduced, which cannot meet the braking requirements of heavy-load and high-load conditions, and the applicable scenarios are severely limited.

[0004] In summary, the existing single-spring, single-sided braking electromagnetic brake design cannot simultaneously achieve both high braking torque and rapid response unlocking, two core performance indicators. These two performance characteristics are mutually restrictive, creating an irreconcilable technical conflict. This makes it difficult to meet the demands of current high-end automation, high-precision, heavy-load, and high-speed applications, significantly limiting the application range of electromagnetic brakes and the improvement of overall equipment transmission performance. Therefore, there is an urgent need to design a novel electromagnetic brake structure to address the technical problems of existing technologies. Summary of the Invention

[0005] The purpose of this invention is to provide a fast-response, high-torque electromagnetic brake and its control method. By adding a set of return springs with a force less than that of the torque spring and in the opposite direction, pressure is applied from the opposite side of the armature and friction plate. This ensures that the initial force attracting the armature only needs to be greater than the difference between the forces of the torque spring and the return spring. When the brake is de-energized, because the force of the torque spring is greater than that of the return spring, the torque spring will push the armature-friction rotor-partition plate to eventually contact the base plate and achieve force balance. At this time, the positive pressure received by the friction rotor is only the resultant force of the torque spring, which can be much greater than that of a brake scheme with pressure applied from one side, thus achieving a large torque.

[0006] The objective of this invention is achieved through the following technical solution: A fast-response, high-torque electromagnetic brake includes a magnetic housing and a base plate corresponding to the magnetic housing. A friction rotor is rotatably mounted on the magnetic housing and the base plate. The friction rotor has a friction brake disc. An armature is movably mounted between the end face of the magnetic housing and the friction brake disc of the friction rotor. A torque spring connected to the armature is installed inside the magnetic housing. A partition is provided between the end face of the base plate and the friction brake disc of the friction rotor. A return spring connected to the partition is installed inside the base plate. An electromagnetic coil corresponding to the armature is installed inside the magnetic housing. The friction brake disc of the friction rotor is placed between the armature and the partition.

[0007] To better realize the present invention, the friction rotor has a bushing at the center of the friction brake disc. The bushing of the friction rotor and the spline sleeve are connected by a spline clearance fit. The bushing of the friction rotor can move axially on the spline sleeve (when the friction rotor rotates freely, the friction rotor can move axially and adapt to a suitable axial position). The magnetic shell has a shaft hole to accommodate the bushing of the friction rotor.

[0008] Preferably, the present invention further includes a motor shaft, which is fitted into a spline sleeve.

[0009] Preferably, the present invention further includes a limiting screw, the partition plate has a through hole, the limiting screw passes through the through hole of the partition plate and is connected and fixed to the bottom plate, the limiting screw allows the limiting space between the partition plate and the bottom plate, and the partition plate moves in the limiting space under the action of the elastic force F2 of the return spring.

[0010] Preferably, a bushing that movably engages with a limiting screw is installed in the through hole of the partition, and a washer is provided on the inner side of the nut of the limiting screw.

[0011] Preferably, the present invention further includes a hollow screw and a mounting screw that mates with the hollow screw. The hollow screw passes through the armature and is connected and fixed to the magnetic shell from the side of the magnetic shell near the armature. The hollow screw is screwed into the magnetic shell to a certain depth from the side of the magnetic shell near the armature. The mounting screw passes through the hollow screw from the side of the magnetic shell away from the armature and is connected and fixed to the base plate.

[0012] Preferably, the present invention further includes a frame located outside the base plate, wherein the mounting screws pass through the base plate and are connected and fixed to the frame.

[0013] A control method for a fast-response, high-torque electromagnetic brake is as follows: When the electromagnetic coil is not energized, the spring force F1 of the torque spring is greater than the spring force F2 of the return spring. The spring forces F1 and F2 are in opposite directions. The resultant force of the spring forces F1 and F2 pushes the armature to contact the friction brake disc, the friction brake disc to contact the partition, and finally the partition to contact the bottom plate to achieve force balance. At this time, the friction rotor is subjected to a positive pressure of F1. Under the pressure of F1, friction is generated and the brake is in a braking state. At this time, there is a gap Z1 between the armature and the magnetic shell, and a gap Z2 between the partition and the gasket. Gap Z1 > gap Z2. When the electromagnetic coil is energized, it initially generates a magnetic force F3 opposite to the torque spring force F1, where F3 > F1 - F2. The electromagnetic coil attracts the armature, overcoming the combined force of the torque spring force F1 and the return spring force F2. The armature begins to move towards the magnetic shell. The friction rotor and the partition are also pushed towards the magnetic shell and the armature by the return spring force F2. When the partition moves upward to contact the pad, the partition and the friction rotor stop moving, and the spring force F2 no longer acts on the friction rotor and the armature. At this time, the movement stroke of the partition is the gap Z2, and the gap between the armature and the magnetic shell is Z1-Z2. Under this gap Z1-Z2 state, the magnetic force F3 of the electromagnetic coil rises to be greater than the torque spring force F1. The armature continues to move towards the magnetic shell until the two are in complete contact. At this time, the friction brake disc of the friction rotor no longer friction brakes and rotates freely. The high-torque electromagnetic brake is in the released braking state.

[0014] Preferably, the present invention further includes an external power component, which is poweredly connected to the friction rotor; when the high-torque electromagnetic brake is in the brake release state, the friction rotor rotates under the drive of the external power component, and there are gap spaces between the friction brake disc of the friction rotor and the partition plate, and between the friction brake disc of the friction rotor and the armature.

[0015] Compared with the prior art, the present invention has the following advantages and beneficial effects: (1) This invention adds a set of return springs with a force less than that of the torque spring and opposite to that of the friction plate to apply pressure from the opposite side of the armature and the friction plate, so that the initial force of the armature is only greater than the difference between the forces of the torque spring and the return spring. When the brake is de-energized, since the force of the torque spring is greater than that of the return spring, the torque spring will push the armature, the friction rotor, and the partition to finally contact the base plate to achieve force balance. At this time, the positive pressure received by the friction rotor is only the resultant force of the torque spring. This force can be much greater than that of the brake scheme with single-sided pressure. Under the condition that the volume of the spring electromagnetic coil remains unchanged, the brake can output a larger braking torque, breaking through the technical limitation of the spring force design in the traditional single-sided braking structure being limited by the electromagnetic coil, greatly improving the braking capacity, and because the torque spring force is larger, a faster braking response time can be achieved.

[0016] (2) The present invention applies pressure to the friction brake disc from both sides simultaneously through the torque spring and the return spring, and makes the braking torque the sum of the friction torques on both sides. Under the condition that the spring parameters and the volume of the electromagnetic coil remain unchanged, the brake can output a larger braking torque, breaking through the technical limitation of the linear binding of elastic force and torque in the traditional single-sided braking structure, and greatly improving the braking capacity.

[0017] (3) In this invention, the electromagnetic coil only needs to overcome the difference in elastic force between the torque spring and the return spring during release: F1-F2. Under the condition that the torque spring force (brake torque) remains unchanged, the electromagnetic resistance can be greatly reduced by increasing F2, which can realize the brake opening quickly when energized, and avoid the stall caused by untimely start-up. Therefore, under the same coil parameters, a faster armature response speed can be obtained, significantly shortening the energization unlocking time and avoiding the positioning deviation and start-stop jamming problems caused by unlocking lag.

[0018] (4) In this invention, the friction rotor achieves axial floating through spline clearance and the limiting screw provides the partition limiting function. When the power is turned on and opened, the inertia generated by the partition pushing the rotor will cause the rotor to move away from the partition. In this way, the friction rotor can adaptively form a double-sided gap in the released state. The friction brake disc is completely separated from the armature and the partition, and the residual torque generated by the rotor still sticking to one side of the frame after the traditional brake is turned on and opened is eliminated. This reduces heat generation and wear, and improves the working reliability, life and operation accuracy of the brake and the transmission system. Attached Figure Description

[0019] Figure 1 This is a cross-sectional view of the high-torque electromagnetic brake of the present invention. Figure 2 for Figure 1 A magnified view of a portion of point A in the middle; Figure 3 for Figure 2 A schematic diagram of the local structure after the gap Z1 is marked in the middle; Figure 4 for Figure 1 A magnified view of a portion of point B in the middle; Figure 5 for Figure 4 A schematic diagram of the local structure after the gap Z2 is marked in the middle; Figure 6 The following is an example diagram illustrating the relationship between magnetic force and the two elastic forces in the embodiment.

[0020] The names corresponding to the reference numerals in the attached figures are as follows: 1-Magnetic shell, 2-Electromagnetic coil, 3-Mounting screw, 4-Armature, 5-Hollow screw, 6-Base plate, 7-Return spring, 8-Partition plate, 9-Spline sleeve, 10-Friction rotor, 11-Limit screw, 12-Washer, 13-Bushing, 14-Torque spring, 15-Frame, 16-Motor shaft. Detailed Implementation

[0021] The present invention will be further described in detail below with reference to embodiments: Example

[0022] like Figure 1 As shown, a fast-response high-torque electromagnetic brake includes a magnetic housing 1 and a base plate 6 corresponding to the magnetic housing 1. The invention also includes a frame 15 located outside the base plate 6, with the base plate 6 fixedly connected to the frame 15. A friction rotor 10 is rotatably mounted on the magnetic housing 1 and the base plate 6. The friction rotor 10 has a friction brake disc (with friction plates on both sides of the friction brake disc). The friction rotor 10 has a bushing at the center of the friction brake disc. The bushing of the friction rotor 10 is connected to a spline sleeve 9 by a spline clearance fit. The bushing of the friction rotor 10 can slide axially on the spline sleeve 9. When the friction rotor 10 rotates freely, it can move axially and adapt to a suitable axial position. The magnetic housing 1 has a shaft hole to accommodate the bushing of the friction rotor 10. The present invention also includes an external power component (preferably a drive motor having a motor shaft 16), a limiting screw 11, a hollow screw 5, and a mounting screw 3 that mates with the hollow screw 5. The external power component is preferably a drive motor having a motor shaft 16, which is fitted into a spline sleeve 9. The friction rotor 10 is driven by the external power component.

[0023] like Figures 1-5As shown, an armature 4 is movably mounted between the end face of the magnetic housing 1 and the friction brake disc of the friction rotor 10. A torque spring 14 connected to the armature 4 is installed inside the magnetic housing 1, and the torque spring 14 applies a spring force F1 to the armature 4 in the direction of the friction brake disc. A partition 8 is provided between the end face of the base plate 6 and the friction brake disc of the friction rotor 10. A return spring 7 connected to the partition 8 is installed inside the base plate 6, and the return spring 7 applies a spring force F2 to the partition 8 in the direction of the friction brake disc. An electromagnetic coil 2 corresponding to the armature 4 is installed inside the magnetic housing 1, and the friction brake disc of the friction rotor 10 is placed between the armature 4 and the partition 8. When the electromagnetic coil 2 is not energized, the spring force F1 of the torque spring 14 is greater than the spring force F2 of the return spring 7. The spring forces F1 and F2 are in opposite directions. The resultant force of the spring forces F1 and F2 pushes the armature 4 to contact the friction brake disc, and the friction brake disc to contact the partition 8. Finally, the partition 8 contacts the base plate 6 to achieve force balance. At this time, the friction rotor 10 is subjected to a positive pressure of F1. Under the pressure of F1, friction is generated and the brake is in a braking state. At this time, there is a gap Z1 between the armature 4 and the magnetic shell 1, and a gap Z2 between the partition 8 and the gasket 12. The gap Z1 is greater than the gap Z2. When the electromagnetic coil 2 is energized, it initially generates a magnetic force F3 opposite to the spring force F1 of the torque spring 14, where F3 > F1 - F2. The electromagnetic coil 2 attracts the armature 4, overcoming the combined force of the spring force F1 of the torque spring 14 and the spring force F2 of the return spring. The armature 4 begins to move towards the magnetic shell 1. The friction rotor 10 and the partition plate 8 are also pushed towards the magnetic shell 1 and the armature 4 by the spring force F2 of the return spring 7. When the partition plate 8 moves upward to contact the pad 12, the partition plate 8 and the friction rotor... When rotor 10 stops moving, the elastic force F2 no longer acts on the friction rotor 10 and armature 4. At this time, the movement stroke of the partition 8 is the gap Z2, and the gap between the armature 4 and the magnetic shell 1 is Z1-Z2. Under this gap Z1-Z2 state, the magnetic force F3 of the electromagnetic coil 2 rises to be greater than the elastic force F1 of the torque spring 14. The armature 4 continues to move towards the magnetic shell 1 until the two are in complete contact. At this time, the friction brake disc of the friction rotor 10 no longer engages in friction braking and rotates freely. The high-torque electromagnetic brake is in the released braking state. Under the condition that the volume of the electromagnetic coil (electromagnetic force) remains unchanged, this invention can increase the force of the torque spring so that the brake can output a larger braking torque; and because the torque spring force is increased, a faster braking response time can be achieved. Under the condition that the torque spring force (brake torque) remains unchanged, the brake can be opened quickly upon energization, avoiding stalling caused by untimely start-up.

[0024] The two states of the present invention, namely the braking state and the released braking state, are described as follows: In the braking state when the electromagnetic coil 2 is not energized, the spring force F1 of the torque spring 14 pushes the armature 4 to contact the friction brake disc and perform friction braking, and the spring force F2 of the return spring 7 pushes the partition 8 to contact the friction brake disc and perform friction braking. At this time, there is no gap space between the armature 4 and the friction brake disc, and between the partition 8 and the friction brake disc. The friction brake disc of the friction rotor 10 is braked under the combined clamping action of the spring forces on both sides. When the electromagnetic coil 2 is energized and the braking is released, the electromagnetic coil 2 generates a magnetic force F3 opposite to the elastic force F1 of the torque spring 14, where F3 > F1. The electromagnetic coil 2 attracts the armature 4 to overcome the elastic force F1 of the torque spring 14 and move away from the friction brake disc. At this time, the friction brake disc of the friction rotor 10 no longer engages in friction braking and rotates freely. Until the armature 4 contacts and is limited to the end face of the magnetic shell 1, a gap space A is formed between the armature 4 and the friction brake disc. Since the friction rotor 10 can float axially, and the partition 8 is limited to the limit position by the limit screw 11 under the push of the return spring 7, a gap space B is also formed between the partition 8 and the friction brake disc. The friction rotor 10 is no longer clamped and can rotate freely under the drive of an external power component.

[0025] In order to achieve the limiting and guiding function of partition 8, such as Figure 4 , Figure 5 As shown, the partition 8 has a through hole, and the limiting screw 11 passes through the through hole of the partition 8 and is connected and fixed to the base plate 6. The limiting screw 11 allows the partition 8 and the base plate 6 to limit the space (forming an axial limiting space between the partition 8 and the base plate 6). The partition 8 moves within the limiting space under the action of the elastic force F2 of the return spring 7. Preferably, a bushing 13, which is axially locked by the limiting screw 11, is installed in the through hole of the partition 8, and a washer 12 is provided on the inner side of the nut of the limiting screw 11. The force F2 of the return spring 7 pushes the partition 8 toward the friction brake disc until the end face of the partition 8 abuts against the pad 12 (the partition 8 contacts the pad 12). This position is the release limit position of the partition 8. During braking, the partition 8 is pushed by the friction brake disc and compresses the return spring 7. It moves within the limit space until the partition 8 is in complete contact with the base plate 6, thereby eliminating the gap and applying positive pressure (the return spring 7 applies a force F2 to the partition 8. In the static friction state of the friction rotor 10 braking, the force F2 of the return spring 7 and the force F1 of the torque spring 14 both act on the friction brake disc from both sides, and the positive pressure it receives is only F1).

[0026] This embodiment also includes a hollow screw 5 and a mounting screw 3 that mates with the hollow screw 5. The hollow screw 5 passes through the armature 4 and is connected and fixed to the magnetic shell 1 from the side of the magnetic shell 1 near the armature 4. The hollow screw 5 is screwed into the magnetic shell 1 to a certain depth from the side of the magnetic shell 1 near the armature 4. The mounting screw 3 passes through the hollow screw 5 from the side of the magnetic shell 1 away from the armature 4 and is connected and fixed to the base plate 6. The mounting screw 3 passes through the base plate 6 and is connected and fixed to the frame 15. Preferably, the mounting screw 3 passes through the center hole of the hollow screw 5 from the side of the magnetic shell 1 away from the armature 4, then passes through the base plate 6 and is fixedly connected to the frame 15.

[0027] A control method for a fast-response, high-torque electromagnetic brake further includes an external power component, which is poweredly connected to the friction rotor 10; the control method is as follows: When the electromagnetic coil 2 is not energized, the spring force F1 of the torque spring 14 is greater than the spring force F2 of the return spring 7. The spring forces F1 and F2 are in opposite directions. The resultant force of the spring forces F1 and F2 pushes the armature 4 to contact the friction brake disc, and the friction brake disc to contact the partition 8. Finally, the partition 8 contacts the base plate 6 to achieve force balance. At this time, the friction rotor 10 is subjected to a positive pressure of F1. Under the pressure of F1, friction is generated and the brake is in a braking state. At this time, there is a gap Z1 between the armature 4 and the magnetic shell 1, and a gap Z2 between the partition 8 and the gasket 12. The gap Z1 is greater than the gap Z2. When electromagnetic coil 2 is energized, its electromagnetic force F3 initially increases (from the start until the brake control is fully released), generating a magnetic force F3 opposite to the spring force F1 of torque spring 14. F3 > F1 - F2. Electromagnetic coil 2 attracts armature 4, overcoming the combined force of the spring force F1 of torque spring 14 and the spring force F2 of return spring. Armature 4 begins to move towards magnetic shell 1. Friction rotor 10 and partition 8 are also pushed towards magnetic shell 1 and armature 4 by the spring force F2 of return spring 7. When partition 8 moves upward to contact gasket 12, partition 8 and friction rotor 10 stop moving, and spring force F2 no longer acts on friction rotor 10 and armature 4. The travel distance of the time partition 8 is the gap Z2, and the gap between the armature 4 and the magnetic shell 1 is Z1-Z2. Under this gap Z1-Z2 state, the magnetic force F3 of the electromagnetic coil 2 increases to be greater than the elastic force F1 of the torque spring 14. The armature 4 continues to move towards the magnetic shell 1 until the two are in complete contact. At this time, the friction brake disc of the friction rotor 10 no longer engages friction braking and rotates freely, and the high-torque electromagnetic brake is in the release braking state. From the start of energization to the release braking control being in place, the electromagnetic force F3 of the electromagnetic coil 2 gradually increases. At the start of energization, the magnetic force of the electromagnetic coil 2 is > F1-F2; when the release braking is in place and free rotation occurs, the magnetic force F3 of the electromagnetic coil 2 increases to be greater than the elastic force F1. See [reference needed]. Figure 6The magnetic force F3 of electromagnetic coil 2 increases sequentially from right to left. This invention, while keeping the volume (electromagnetic force) of the electromagnetic coil constant, increases the force of the torque spring, enabling the brake to output a larger braking torque; and due to the increased torque spring force, a faster braking response time can be achieved. Under the condition that the torque spring force (brake torque) remains constant, the brake can be opened quickly upon energization, avoiding stalling caused by delayed start-up.

[0028] In some embodiments, during the initial stage of brake release, the present invention only requires the electromagnetic coil to overcome the residual spring force (F1-F2) after the torque spring is canceled by the reset spring. During the release process, after the armature's movement reaches the limit distance "Z2" of the partition, the distance between the armature and the magnetic shell is greatly reduced, and the electromagnetic force on the armature increases exponentially, much greater than the torque spring force, which can ensure that the armature continues to move until it is fully attracted and the brake is opened. By flexibly adjusting the relative relationship between the coil electromagnetic force and the spring force, a larger torque and braking response time can be achieved than the traditional single-sided pressurized electromagnetic brake with the same coil size; or a faster opening time with the same torque; and the rotor anti-accidental contact function is also taken into account.

[0029] This invention requires only an electromagnetic coil to overcome the unilateral force of the torque spring when the brake is released, while the braking torque is contributed by both sides of the spring, thus fundamentally solving the irreconcilable contradiction between large braking torque and fast response in traditional single-sided brakes.

[0030] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A fast-response, high-torque electromagnetic brake, characterized in that: The device includes a magnetic shell and a base plate corresponding to the magnetic shell. A friction rotor is rotatably mounted on the magnetic shell and the base plate. The friction rotor has a friction brake disc. An armature is movably mounted between the end face of the magnetic shell and the friction brake disc of the friction rotor. A torque spring connected to the armature is installed inside the magnetic shell. A partition is provided between the end face of the base plate and the friction brake disc of the friction rotor. A return spring connected to the partition is installed inside the base plate. An electromagnetic coil corresponding to the armature is installed inside the magnetic shell. The friction brake disc of the friction rotor is placed between the armature and the partition.

2. The fast-response high-torque electromagnetic brake according to claim 1, characterized in that: The friction rotor has a bushing at the center of the friction brake disc. The bushing of the friction rotor is connected to the spline sleeve by a spline clearance fit. The bushing of the friction rotor can move axially on the spline sleeve. The magnetic shell has a shaft hole to accommodate the bushing of the friction rotor.

3. The fast-response high-torque electromagnetic brake according to claim 2, characterized in that: It also includes a motor shaft, which is fitted into a spline sleeve.

4. The fast-response high-torque electromagnetic brake according to claim 1, characterized in that: It also includes a limiting screw. The partition has a through hole. The limiting screw passes through the through hole of the partition and is connected and fixed to the base plate. The limiting screw allows the partition and the base plate to limit the space. The partition moves in the limited space under the action of the spring force F2 of the return spring.

5. A fast-response high-torque electromagnetic brake according to claim 4, characterized in that: A bushing that movably engages with a limiting screw is installed in the through hole of the partition plate, and a washer is provided on the inner side of the nut of the limiting screw.

6. A fast-response high-torque electromagnetic brake according to claim 1, characterized in that: It also includes hollow screws and mounting screws that mate with the hollow screws. The hollow screws pass through the armature and are connected and fixed to the magnetic shell from the side of the magnetic shell near the armature. The hollow screws are screwed into the magnetic shell to a certain depth from the side of the magnetic shell near the armature. The mounting screws pass through the hollow screw from the side of the magnetic shell away from the armature and are connected and fixed to the base plate.

7. A fast-response high-torque electromagnetic brake according to claim 6, characterized in that: It also includes a frame located outside the base plate, with the mounting screws passing through the base plate and connecting and fixing it to the frame.

8. A control method for a fast-response high-torque electromagnetic brake as described in claim 1, characterized in that: The control method is as follows: When the electromagnetic coil is not energized, the spring force F1 of the torque spring is greater than the spring force F2 of the return spring. The spring forces F1 and F2 are in opposite directions. The resultant force of the spring forces F1 and F2 pushes the armature to contact the friction brake disc, the friction brake disc to contact the partition, and finally the partition to contact the bottom plate to achieve force balance. At this time, the friction rotor is subjected to a positive pressure of F1. Under the pressure of F1, friction is generated and the brake is in a braking state. At this time, there is a gap Z1 between the armature and the magnetic shell, and a gap Z2 between the partition and the gasket. Gap Z1 > gap Z2. When the electromagnetic coil is energized, it initially generates a magnetic force F3 opposite to the torque spring force F1, where F3 > F1 - F2. The electromagnetic coil attracts the armature, overcoming the combined force of the torque spring force F1 and the return spring force F2. The armature begins to move towards the magnetic shell. The friction rotor and the partition are also pushed towards the magnetic shell and the armature by the return spring force F2. When the partition moves upward to contact the pad, the partition and the friction rotor stop moving, and the spring force F2 no longer acts on the friction rotor and the armature. At this time, the movement stroke of the partition is the gap Z2, and the gap between the armature and the magnetic shell is Z1-Z2. Under this gap Z1-Z2 state, the magnetic force F3 of the electromagnetic coil rises to be greater than the torque spring force F1. The armature continues to move towards the magnetic shell until the two are in complete contact. At this time, the friction brake disc of the friction rotor no longer friction brakes and rotates freely. The high-torque electromagnetic brake is in the released braking state.

9. The control method for a fast-response high-torque electromagnetic brake according to claim 8, characterized in that: It also includes an external power component, which is poweredly connected to the friction rotor; when the high-torque electromagnetic brake is in the brake release state, the friction rotor rotates under the drive of the external power component, and there are gap spaces between the friction brake disc and the partition of the friction rotor, and between the friction brake disc and the armature of the friction rotor.

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