Elastic interference braking structure and electromagnetic brake

Abstract

The utility model relates to brake technology field provides a kind of elastic interference braking structure and electromagnetic brake, elastic interference braking structure includes dynamic plate and brake disc, first wave spring is equipped on dynamic plate, second wave spring is equipped on brake disc, when braking, the wave crest of first wave spring and the wave trough of second wave spring interfere with each other, when torque exceeds target value, first wave spring and second wave spring occur elastic deformation, so that brake disc can rotate.The utility model not only can normal braking, and when torque exceeds target value, first wave spring and second wave spring are extruded deformation, 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 interference 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 interference 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 interference braking structure includes a moving plate and a brake disc. The moving plate is provided with a first wave spring, and the brake disc is provided with a second wave spring. During braking, the crest of the first wave spring and the trough of the second wave spring interfere with each other. When the torque exceeds the target value, the first wave spring and the second wave spring undergo elastic deformation, enabling the brake disc to rotate.

[0007] This utility model also provides an electromagnetic brake, including the above-mentioned elastic interference braking structure.

[0008] This utility model also provides an electromagnetic brake, including a stator, a pressure spring and the above-mentioned elastic interference braking structure. 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.

[0009] Optionally, the limiting member is a snap ring mounted on the motor shaft.

[0010] Optionally, the motor shaft is provided with a positioning step that abuts against the brake disc.

[0011] Optionally, the stator has a blind mounting hole on the side near the brake disc, and the compression spring is installed in the blind mounting hole.

[0012] 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.

[0013] Optionally, the guide opening is a through hole on the moving plate or a notch on the outer edge of the moving plate.

[0014] The technical solution of this utility model has at least the following advantages and beneficial effects: In this utility model, a first wave spring is provided on the moving plate, and a second wave spring is provided on the brake disc. When braking, the moving plate approaches the brake disc, and the first and second wave springs overlap. That is, the crest of the first wave spring and the trough of the second wave spring 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 first and second wave springs are compressed and deformed, and the motor can drive the brake disc to rotate, which meets the requirements of special working conditions and avoids affecting the performance of the motor due to the braking structure. Attached Figure Description

[0015] Figure 1 A schematic diagram of an elastic interference braking structure provided by this utility model; Figure 2 A schematic diagram of the structure of an electromagnetic brake provided by this utility model; Reference numerals in the attached drawings: 1-moving plate, 101-first wave spring, 102-guide port, 2-brake disc, 201-second wave spring, 3-stator, 301-magnetic yoke, 302-coil, 4-rotating shaft, 5-limiting component, 6-positioning sleeve, 7-support screw, 8-compression spring. Detailed Implementation

[0016] refer to Figure 1An elastic interference braking structure includes a movable plate 1 and a brake disc 2. The movable plate 1 is provided with a first wave spring 101, and the brake disc 2 is provided with a second wave spring 201. Specifically, the first wave spring 101 can be fixed to the side of the movable plate 1 near the brake disc 2 by welding, bonding, riveting, etc., and the second wave spring 201 can also be fixed to the side of the brake disc 2 near the movable plate 1 by welding, bonding, riveting, etc.

[0017] Taking its application in a power-off electromagnetic brake as an example, in the power-off state, the moving plate 1 approaches the brake disc 2 under the action of the spring force. The first wave spring 101 and the second wave spring 201 overlap, that is, the crest of the first wave spring 101 and the trough of the second wave spring 201 interfere with each other in the circumferential direction, thereby restricting the rotation of the brake disc 2 and forming a brake. When the torque exceeds the target value, the first wave spring 101 and the second wave spring 201 are squeezed and deformed, 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 performance of the motor. In the power-on state, the moving plate 1 is attracted by the stator 3 and moves away from the brake disc 2. The first wave spring 101 and the second wave spring 201 are offset in the axial direction and will not interfere in the circumferential direction, thereby releasing the brake.

[0018] It should be understood that in practical applications, the shapes of the moving plate 1 and the brake disc 2 can be adapted to meet actual needs.

[0019] refer to Figure 2 This embodiment also provides an electromagnetic brake, including a stator 3, a pressure spring 8, and the aforementioned elastic interference braking structure. 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.

[0020] 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.

[0021] 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.

[0022] It should be understood that the structure of the electromagnetic brake described above is only one option. In other embodiments, the elastic interference braking structure described above can be applied to electromagnetic brakes of any structure.

[0023] 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. An elastic interference braking structure, comprising a moving plate and a brake disc, characterized in that, The moving plate is equipped with a first wave spring, and the brake disc is equipped with a second wave spring. When braking, the crest of the first wave spring and the trough of the second wave spring interfere with each other. When the torque exceeds the target value, the first wave spring and the second wave spring undergo elastic deformation, enabling the brake disc to rotate.

2. An electromagnetic brake, characterized in that, Includes the elastic interference braking structure as described in claim 1.

3. An electromagnetic brake, characterized in that, The device includes a stator, a pressure spring, and the elastic interference braking structure as described in claim 1. 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.

4. The electromagnetic brake according to claim 3, characterized in that, The limiting component is a retaining ring installed on the motor shaft.

5. The electromagnetic brake according to claim 3, characterized in that, The motor shaft is equipped with a positioning step that abuts against the brake disc.

6. The electromagnetic brake according to claim 3, characterized in that, The stator has a blind mounting hole on the side near the brake disc, and the pressure spring is installed in the blind mounting hole.

7. The electromagnetic brake according to claim 3, 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.

8. The electromagnetic brake according to claim 7, 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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