Elastic locking pin braking structure and electromagnetic brake

Abstract

The utility model relates to the technical field of brake, provide a kind of elastic locking pin braking structure and electromagnetic brake, elastic locking pin braking structure includes dynamic plate and brake disc, one of dynamic plate and brake disc is equipped with rigid part, the other is equipped with elastomer, when braking, elastomer and rigid part are mutually interfered and limit brake disc rotation, when torque exceeds target value, elastomer occurs elastic deformation, so that brake disc can rotate.The utility model not only can normal brake, and when torque exceeds target value, elastomer occurs elastic deformation under the extrusion of rigid part, motor can drive brake disc to rotate, meet special working condition use demand, also avoid the performance of motor due to braking structure.

Description

Technical Field

[0001] This utility model relates to the field of brake technology, and more specifically, to an elastic locking pin braking structure and an electromagnetic brake. Background Technology

[0002] As a key safety component in mechanical transmission systems, brakes are widely used in fields such as motors, engineering machinery, and rail transportation. Their core function is to achieve precise braking or positioning by constraining the rotation of moving parts.

[0003] Currently, commonly used power-off electromagnetic brakes mainly fall into two categories: friction braking and locking pin (mechanical interference) braking. Friction braking relies on the friction between the friction material and the brake disc to generate braking torque. However, the friction coefficient of the friction material has inherent limitations, resulting in a clear limit to the torque of the brake within the same volume, failing to meet the demands of high-torque scenarios. Furthermore, friction brakes are significantly affected by environmental factors. Under extreme conditions such as high temperature and humidity, or alternating high and low temperatures, friction performance easily degrades, leading to braking failure or limited use. Frictional heat generation can further cause abnormal torque fluctuations, potentially causing motor overload failure. Locking pin braking, on the other hand, achieves braking through the mechanical interference of a locking pin with a corresponding structure. Within the same volume, it can provide a much greater torque than friction braking, solving the problem of high-torque requirements.

[0004] However, in practical applications such as industrial production and automated equipment, some operating conditions require the motor to rotate when the target torque is exceeded without affecting its performance. Locking pin brakes, due to their extremely high torque limit, obviously cannot meet these conditions. Friction brakes, on the other hand, are prone to motor failure due to significant frictional heat generation, which can lead to excessive brake overheating and a sharp increase in torque, ultimately causing motor failure as well. Therefore, they also cannot meet these conditions. Utility Model Content

[0005] The purpose of this invention is to provide an elastic locking pin braking structure and an electromagnetic brake to solve the above-mentioned defects of the prior art, so that the motor can brake normally below the target torque and can rotate when the target torque is exceeded, while avoiding the braking structure from affecting the motor performance.

[0006] This utility model is achieved through the following technical solution: An elastic locking pin braking structure includes a movable plate and a brake disc. One of the movable plate and the brake disc is provided with a rigid part, and the other is provided with an elastic body. During braking, the elastic body and the rigid part interfere with each other to restrict the rotation of the brake disc. When the torque exceeds the target value, the elastic body undergoes elastic deformation, allowing the brake disc to rotate.

[0007] Optionally, the elastic body is a spring sheet.

[0008] Optionally, the elastomer is a spring steel wire.

[0009] Optionally, the rigid part is a plurality of protrusions spaced apart along the circumferential direction.

[0010] Optionally, the rigid part is a plurality of limiting holes spaced apart along the circumferential direction.

[0011] This utility model also provides an electromagnetic brake, including the elastic locking pin braking structure described in any one of the above.

[0012] This utility model also provides an electromagnetic brake, including a stator, a pressure spring and any one of the above-described elastic locking pin braking structures, wherein the moving plate is disposed between the stator and the brake disc, the pressure spring is disposed between the stator and the moving plate, the brake disc is disposed on the rotating shaft of the motor, and the rotating shaft is provided with a limiting member on the side of the brake disc away from the stator.

[0013] Optionally, the limiting member is a snap ring mounted on the motor shaft.

[0014] Optionally, a support screw is fixedly connected to the side of the stator near the brake disc, and a positioning sleeve is fitted on the support screw to limit the distance between the stator and the head of the support screw. The moving plate is provided with a guide opening that cooperates with the positioning sleeve.

[0015] Optionally, the guide opening is a through hole on the moving plate or a notch on the outer edge of the moving plate.

[0016] The technical solution of this utility model has at least the following advantages and beneficial effects: In this utility model, one of the moving plate and the brake disc is provided with a rigid part, and the other is provided with an elastic body. When braking, the moving plate approaches the brake disc, so that the elastic body and the rigid part interfere with each other in the circumferential direction, thereby restricting the rotation of the brake disc and forming braking; when the torque exceeds the target value, the elastic body undergoes elastic deformation under the compression of the rigid part, and the motor can drive the brake disc to rotate, which meets the requirements of special working conditions and avoids the impact of the braking structure on the performance of the motor. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of an elastic locking pin braking structure provided in Embodiment 1; Figure 2 This is a schematic diagram of an elastic locking pin braking structure provided in Embodiment 2; Figure 3 This is a schematic diagram of the structure of an electromagnetic brake provided in Example 3; Reference numerals: 1-moving plate, 101-rigid part, 102-guide port, 2-brake disc, 201-elastic body, 3-stator, 301-magnetic yoke, 302-coil, 4-rotating shaft, 5-limiting component, 6-positioning sleeve, 7-support screw, 8-compression spring. Detailed Implementation

[0018] Example 1 refer to Figure 1 A resilient locking pin braking structure includes a movable plate 1 and a brake disc 2. One of the movable plate 1 and the brake disc 2 has a rigid part 101, and the other has an elastic body 201. Taking its application in a power-off electromagnetic brake as an example, in the power-off state, the movable plate 1 approaches the brake disc 2 under the action of spring force, so that the elastic body 201 and the rigid part 101 can form mutual interference in the circumferential direction, thereby restricting the rotation of the brake disc 2 and realizing braking. When the torque exceeds the target value, the elastic body 201 undergoes elastic deformation under the compression of the rigid part 101, and the motor can drive the brake disc 2 to rotate, meeting the requirements of special working conditions and avoiding the impact of the braking structure on the motor performance. In the power-on state, the movable plate 1 is attracted by the stator 3 and moves away from the brake disc 2. The elastic body 201 and the rigid part 101 are offset in the axial direction and will not form interference in the circumferential direction, thereby releasing the brake.

[0019] In this embodiment, the elastic body 201 is a spring sheet. Specifically, the spring sheet is disposed on the brake disc 2, for example, by welding it to the outer wall of the brake disc 2, or by bonding, screw connection, or other methods. Based on this, the rigid part 101 is disposed on the side of the moving plate 1 near the brake disc 2. In this embodiment, the rigid part 101 consists of several protrusions spaced apart along the circumference of the moving plate 1. In the de-energized state, the spring sheet is inserted into the gap between adjacent protrusions, interfering with the protrusions in the circumferential direction. In other embodiments, the rigid part 101 may also be several limiting holes spaced apart along the circumferential direction of the moving plate 1. In the de-energized state, the end of the spring sheet is inserted into the limiting hole, interfering with the sidewall of the limiting hole in the circumferential direction.

[0020] It should be understood, and is readily apparent, that in other embodiments, the elastomer 201 may also be disposed on the moving plate 1, in which case the rigid part 101 is disposed on the brake disc 2. The shapes of the moving plate 1 and the brake disc 2 themselves, as well as the specific shapes of the rigid part 101 and the elastomer 201, may also be adapted to actual needs.

[0021] Example 2 refer to Figure 2 The difference between this embodiment and Embodiment 1 lies in the specific form of the elastic body 201. Specifically, in this embodiment, the elastic body 201 is a spring steel wire, which can be fixed to the end face of the brake disc 2 by welding, bonding, threaded connection, etc. The rigid part 101 is also a plurality of protrusions spaced apart along the circumference of the moving plate 1. It is easy to understand that the spring steel wire can also be set on the moving plate 1 and the protrusions can be set on the brake disc 2. Similarly, the protrusions can also be replaced with limiting holes.

[0022] Example 3 refer to Figure 3 This embodiment provides an electromagnetic brake, including a stator 3, a pressure spring 8, and an elastic locking pin braking structure provided in Embodiment 1 (or the elastic locking pin braking structure provided in Embodiment 2). It should be understood that the stator 3 consists of a magnetic yoke 301 and a coil 302. A moving plate 1 is located between the stator 3 and the brake disc 2, which is mounted on the motor shaft 4. The pressure spring 8 is located between the stator 3 and the moving plate 1 (specifically, the stator 3 has a blind mounting hole, and the pressure spring 8 is installed within the blind mounting hole). In the de-energized state, the pressure spring 8 applies pressure to the moving plate 1, causing it to approach the brake disc 2; in the energized state, the stator 3 attracts the moving plate 1.

[0023] The rotating shaft 4 has a limiting member 5 on the side of the brake disc 2 away from the stator 3. Alternatively, in this embodiment, the limiting member 5 is a retaining ring mounted on the rotating shaft 4 of the motor. Furthermore, the rotating shaft 4 has a positioning step, with one side of the brake disc 2 abutting against the positioning step and the other end abutting against the limiting member 5, thus restricting the axial movement of the brake disc 2. In other embodiments, the limiting member 5 can of course be in other forms, such as a ring, which is fastened by a screw connected to the rotating shaft 4 or locked by a nut connected to the rotating shaft 4.

[0024] In this embodiment, a support screw 7 is fixedly connected to the side of the stator 3 near the brake disc 2. A positioning sleeve 6 is fitted onto the support screw 7 to limit the distance between the stator 3 and the head of the support screw 7. The length range of the positioning sleeve 6 is the axial movement range of the moving plate 1. The moving plate 1 is provided with guide openings 102 that cooperate with the positioning sleeve 6. Several guide openings 102 are arranged along the circumferential direction to achieve radial positioning of the moving plate 1. At the same time, the positioning sleeve 6 also serves as a guide for the movement of the moving plate 1. As an alternative, in this embodiment, the guide opening 102 is a notch provided on the outer edge of the moving plate 1; in other embodiments, the guide opening 102 can also be other structures, such as a through hole on the moving plate 1.

[0025] It should be understood that the structure of the electromagnetic brake described above is only one option. In other embodiments, the elastic locking pin braking structure provided in Embodiment 1 and the elastic locking pin braking structure provided in Embodiment 2 can be applied to electromagnetic brakes of any structure.

[0026] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A resilient locking pin braking structure, comprising a movable plate and a brake disc, characterized in that, One of the moving plate and the brake disc is provided with a rigid part, and the other is provided with an elastic body. When braking, the elastic body and the rigid part interfere with each other to restrict the rotation of the brake disc. When the torque exceeds the target value, the elastic body undergoes elastic deformation, allowing the brake disc to rotate.

2. The elastic locking pin braking structure according to claim 1, characterized in that, The elastic body is a spring sheet.

3. The elastic locking pin braking structure according to claim 1, characterized in that, The elastic body is a spring steel wire.

4. The elastic locking pin braking structure according to claim 1, characterized in that, The rigid part consists of several protrusions spaced apart along the circumferential direction.

5. The elastic locking pin braking structure according to claim 1, characterized in that, The rigid part consists of a plurality of limiting holes spaced apart along the circumferential direction.

6. An electromagnetic brake, characterized in that, Includes the elastic locking pin braking structure as described in any one of claims 1-5.

7. An electromagnetic brake, characterized in that, The device includes a stator, a pressure spring, and an elastic locking pin braking structure as described in any one of claims 1-5. The moving plate is disposed between the stator and the brake disc, the pressure spring is disposed between the stator and the moving plate, the brake disc is disposed on the rotating shaft of the motor, and the rotating shaft has a limiting member on the side of the brake disc away from the stator.

8. The electromagnetic brake according to claim 7, characterized in that, The limiting component is a retaining ring installed on the motor shaft.

9. The electromagnetic brake according to claim 7, characterized in that, A support screw is fixedly connected to the side of the stator near the brake disc. A positioning sleeve is fitted on the support screw to limit the distance between the stator and the head of the support screw. A guide port that cooperates with the positioning sleeve is provided on the moving plate.

10. The electromagnetic brake according to claim 9, characterized in that, The guide opening is either a through hole on the moving plate or a notch on the outer edge of the moving plate.

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