An electromagnetic brake capable of precisely adjusting torque

Abstract

The utility model discloses a kind of electromagnetic brakes of accurate torque adjustment, belong to electromagnetic brake technical field, including yoke, moving plate, rotor assembly and flange, the middle part of the side of yoke away from moving plate is equipped with torque adjusting device, the torque adjusting device includes pressing block and movable spring assembly, the pressing block cross section is T type, the pressing block includes integral connecting part and pressing part, the pressing part is connected with the yoke screw thread;Multiple movable spring assembly is arranged in the pressing block, and the movable spring assembly includes pressing stud and movable spring.The utility model can be screwed in or screwed out pressing part, the pressing degree of all movable springs is adjusted as a whole, ensure that the overall adjustment amount of multiple movable springs is consistent;It can also be also individually adjusted movable spring or replace the length of movable spring.

Description

Technical Field

[0001] This utility model belongs to the field of electromagnetic brake technology, and in particular relates to an electromagnetic brake with precisely adjustable torque. Background Technology

[0002] Currently, most conventional brakes adjust torque by adding shims or replacing springs to adjust spring force. However, suitable shims and springs are not easy to find or need to be purchased again, which extends the brake manufacturing cycle. In addition, adjusting torque by changing or increasing the number of shims or changing the spring length is not easy to control and can easily cause the brake to overshoot the engagement voltage.

[0003] Chinese patent CN222772555U discloses a torque-adjustable electromagnetic brake, which states that: "By adding multiple adjustable reset springs and multiple adjusting studs inside the magnetic yoke, the adjustable reset springs can be tightened or loosened by rotating the multiple adjusting studs, thereby changing the elastic force of the adjustable reset springs."

[0004] However, the above solution has some shortcomings. Each adjustable return spring requires adjustment via its corresponding adjusting stud, making it impossible to adjust multiple adjustable return springs as a whole, and thus failing to guarantee consistent adjustment across all springs. Furthermore, replacing multiple adjustable return springs requires removing each adjusting stud, resulting in low replacement efficiency. Utility Model Content

[0005] The purpose of this invention is to provide an electromagnetic brake with precisely adjustable torque to solve the problems existing in the prior art.

[0006] The objective of this utility model is achieved through the following technical solution: An electromagnetic brake with precisely adjustable torque includes a magnetic yoke, a moving plate, a rotor assembly, and a flange. A torque adjustment device is provided in the middle of the side of the magnetic yoke away from the moving plate. The torque adjustment device includes a pressure block and a movable spring assembly. The pressure block has a T-shaped cross-section and includes an integral connecting part and a clamping part. The clamping part is threadedly connected to the magnetic yoke. A plurality of movable spring assemblies are circumferentially arranged within the pressure block. Each movable spring assembly includes a clamping stud and a movable spring.

[0007] Furthermore, the magnetic yoke has an opening in the middle, the clamping part is threadedly connected to the opening, and the diameter of the connecting part is larger than the diameter of the opening.

[0008] Furthermore, the connecting part is provided with locking screws, and two locking screws are symmetrically arranged on both sides of the opening. The ends of the locking screws abut against the magnetic yoke. The two fixing screws are symmetrically arranged on both sides of the opening.

[0009] Furthermore, the pressure block has a through hole corresponding to the position of the movable spring assembly, the clamping stud is threaded to the through hole, and the movable spring is located between the clamping stud and the moving plate.

[0010] Furthermore, the length of the clamping stud is less than the length of the through hole, and a nut is provided on the side of the clamping stud away from the movable spring.

[0011] Furthermore, a fixing spring is provided on the circumference of the magnetic yoke located outside the connecting part.

[0012] Furthermore, a hexagonal hole is provided in the center of the side of the pressure block away from the moving plate.

[0013] The beneficial effects of this utility model are: All movable springs are located inside the clamping part, so by screwing the clamping part in or out, the clamping degree of all movable springs can be adjusted as a whole, improving the efficiency of adjusting multiple movable springs and ensuring that the overall adjustment amount of multiple movable springs is consistent.

[0014] The compression level of the movable spring can be adjusted by individually adjusting the corresponding clamping stud. Simultaneously, by removing the clamping stud and unscrewing it from the through hole, the movable spring inside can be replaced. Movable springs of different lengths can be used as needed. Attached Figure Description

[0015] Figure 1 This is a cross-sectional view of an electromagnetic brake with precisely adjustable torque according to the present invention. Figure 2 for Figure 1 A schematic diagram of direction A in the middle; Figure 3 This is a plan view of the torque adjustment device in this utility model; In the figure, 1-magnetic yoke, 11-opening, 2-moving plate, 3-rotor assembly, 4-flange, 5-pressure block, 51-connecting part, 52-pressing part, 53-locking screw, 54-hexagonal hole, 55-through hole, 6-movable spring assembly, 61-pressing stud, 62-movable spring, 63-nut. Detailed Implementation

[0016] The technical solution of this utility model will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0017] See Figures 1-3This utility model provides a technical solution: An electromagnetic brake with precisely adjustable torque includes a magnetic yoke 1, a moving plate 2, a rotor assembly 3, and a flange 4. A coil is also installed inside the magnetic yoke 1. The moving plate 2 and rotor assembly 3 are located between the magnetic yoke 1 and the flange 4. A fixing spring is also installed between the magnetic yoke 1 and the moving plate 2. The basic principle of the electromagnetic brake is as follows: when current passes through the coil, it generates magnetic flux. The magnetic yoke 1 generates an electromagnetic attraction force on the moving plate 2, attracting it to the end face of the magnetic yoke 1. By continuously energizing the moving plate 2, it overcomes the elastic force of the fixing spring and separates from the rotor assembly 3, while the rotor assembly 3 continues to rotate. When the power is off, the moving plate 2 is released by the elastic force of the fixing spring, and the moving plate 2 re-engages with the rotor assembly 3, generating braking torque.

[0018] However, the elastic force generated by the fixed spring is fixed and the braking torque cannot be adjusted. In this embodiment, a torque adjustment device is provided in the middle of the side of the magnetic yoke 1 away from the moving plate 2. The braking torque is adjusted by the torque adjustment device to ensure that the brake can generate braking force quickly and stably when the power is off, thus ensuring equipment safety.

[0019] Specifically, the torque adjustment device includes a pressure block 5 and a movable spring assembly 6, such as... Figure 1 As shown, the pressure block 5 has a T-shaped cross-section and includes an integral connecting part 51 and a pressing part 52. The magnetic yoke 1 has an opening 11 corresponding to the pressing part 52, and the pressing part 52 is threadedly connected to the opening 11. Eight sets of movable spring assemblies 6 are circumferentially arranged on the pressing part 52. The pressure block 5 has a through hole 55 corresponding to the movable spring assembly 6, and the pressing stud 61 is threadedly connected to the through hole 55. The movable spring 62 is located between the pressing stud 61 and the moving plate 2. The pressing degree of the movable spring 62 can be adjusted by individually adjusting the pressing stud 61 corresponding to the movable spring 62. Simultaneously, by removing the pressing stud 61 from the through hole 55 and unscrewing it, the movable spring 62 inside can be replaced. Furthermore, movable springs 62 of different lengths can be replaced according to actual needs.

[0020] Since all the movable springs 62 are located inside the clamping part 52, the clamping degree of all the movable springs 62 can be adjusted as a whole by screwing the clamping part 52 in or out, which improves the efficiency of adjusting multiple movable springs 62 and ensures that the overall adjustment amount of multiple movable springs 62 is consistent.

[0021] Furthermore, the diameter of the connecting part 51 is larger than the diameter of the opening 11. The connecting part 51 is provided with locking screws 53. Two locking screws 53 are symmetrically arranged on both sides of the opening 11. The ends of the locking screws 53 abut against the magnetic yoke 1. By adding locking screws 53, the connection strength between the pressure block 5 and the magnetic yoke 1 is improved, and vibration is prevented from causing the pressure block 5 to rotate out of the opening 11, resulting in a change in the compression of the movable spring 62.

[0022] Furthermore, the length of the clamping stud 61 is less than the length of the through hole 55, and a nut 63 is provided on the side of the clamping stud 61 away from the movable spring 62. The nut 63 limits the pressing depth of the clamping stud 61, while... Figure 2 As shown, the nut 63 has a slotted groove to facilitate screwing in or out the clamping stud 61.

[0023] Furthermore, a hexagonal hole 54 is provided in the middle of the side of the pressure block 5 away from the moving plate 2. The pressure block 5 can be easily screwed in or out by a hexagonal wrench through the hexagonal hole 54, or the pressure block 5 can be screwed in or out by manually rotating the connecting part 51.

[0024] The above description is merely a preferred embodiment of this utility model. It should be understood that this utility model is not limited to the forms disclosed herein and should not be construed as excluding other embodiments. It can be used in various other combinations, modifications, and environments, and can be altered within the scope of the concept described herein through the above teachings or related technologies or knowledge. Modifications and variations made by those skilled in the art that do not depart from the spirit and scope of this utility model should be protected within the scope of the appended claims.

Claims

1. An electromagnetic brake with precisely adjustable torque, comprising a magnetic yoke (1), a moving plate (2), a rotor assembly (3), and a flange (4), characterized in that: A torque adjustment device is provided in the middle of the side of the magnetic yoke (1) away from the moving plate (2). The torque adjustment device includes a pressure block (5) and a movable spring assembly (6). The pressure block (5) has a T-shaped cross section and includes an integral connecting part (51) and a pressing part (52). The pressing part (52) is threadedly connected to the magnetic yoke (1). A plurality of movable spring assemblies (6) are arranged circumferentially in the pressure block (5). The movable spring assembly (6) includes a pressing stud (61) and a movable spring (62).

2. The electromagnetic brake with precisely adjustable torque according to claim 1, characterized in that: The magnetic yoke (1) has an opening (11) in the middle, and the clamping part (52) is threadedly connected to the opening (11). The diameter of the connecting part (51) is larger than the diameter of the opening (11).

3. The electromagnetic brake with precisely adjustable torque according to claim 2, characterized in that: The connecting part (51) is provided with locking screws (53), and two locking screws (53) are symmetrically arranged on both sides of the opening (11). The ends of the locking screws (53) abut against the magnetic yoke (1).

4. The electromagnetic brake with precisely adjustable torque according to claim 1, characterized in that: The pressure block (5) has a through hole (55) corresponding to the position of the movable spring assembly (6), the pressure stud (61) is threaded to the through hole (55), and the movable spring (62) is located between the pressure stud (61) and the moving plate (2).

5. The electromagnetic brake with precisely adjustable torque according to claim 4, characterized in that: The length of the clamping stud (61) is less than the length of the through hole (55), and a nut (63) is provided on the side of the clamping stud (61) away from the movable spring (62).

6. The electromagnetic brake with precisely adjustable torque according to claim 1, characterized in that: The magnetic yoke (1) is provided with a fixing spring on the circumference outside the connecting part (51).

7. The electromagnetic brake with precisely adjustable torque according to claim 1, characterized in that: The pressure block (5) has a hexagonal hole (54) in the middle of the side away from the moving plate (2).

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