Integrated rotor electromagnetic brake

Abstract

The utility model relates to the technical field of electromagnetic brakes, and discloses an integrated rotor electromagnetic brake which comprises a magnet yoke and an electromagnetic coil arranged in the magnet yoke. The fixing plate is fixed at the top of the magnet yoke, the integrated rotor is arranged between the fixing plate and the magnet yoke, the armature is arranged between the integrated rotor and the magnet yoke, the spring is arranged at the bottom of the armature, the other end of the spring is connected with the magnet yoke, and the integrated rotor is connected with the interface shaft in a coupling mode. And a rubber damping ring is arranged at the meshed part. According to the utility model, the integrated rotor and the interface shaft are connected in a coupling manner, and the rubber damping ring is combined, so that the noise in the operation process can be obviously reduced, the meshing stability is effectively improved, the impact load is greatly reduced, and the wear rate is effectively reduced.

Description

Technical Field

[0001] This utility model relates to the field of electromagnetic brake technology, and in particular to an integrated rotor electromagnetic brake. Background Technology

[0002] A brake is a functional device used to decelerate, stop, or maintain a stopped state of moving parts or mechanical equipment. Electromagnetic drive brakes are widely used in large and medium-sized cranes, port loading and unloading machinery, metallurgical machinery, transportation machinery, and mining machinery to achieve braking and deceleration functions.

[0003] During the installation of an electromagnetic brake, the rotor transmits power to the motor shaft via a bushing. Common bushings use a splined structure; however, during manufacturing, backlash is unavoidable, typically greater than 0.02mm and sometimes exceeding 0.1mm. Therefore, a perfectly tight fit cannot be achieved between the keyway of the splined bushing and the splined bore of the rotor. With prolonged operation, this initial gap widens due to wear, causing unstable fluctuations in rotor speed when the motor shaft drives the rotor. These speed fluctuations result in relative movement between the splined bushing and the rotor splined bore, leading to mechanical collisions, significant noise, and severely impacting the stability and lifespan of the equipment.

[0004] Currently, electromagnetic brake solutions commonly employ a design that adds a plastic component between the internal and external splines. However, while this design can reduce noise to some extent, it significantly reduces meshing accuracy and causes an unstable increase in frictional torque, resulting in less than ideal practical performance. Furthermore, the manufacturing process of traditional friction pads also has significant drawbacks: the base material and friction material are bonded together, which is not only complex and costly but also hinders production efficiency. More importantly, this process poses a serious challenge to environmental protection and fails to meet the requirements of modern industrial green manufacturing. Utility Model Content

[0005] The purpose of this invention is to solve the problems existing in the prior art by proposing an integrated rotor electromagnetic brake.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] An integrated rotor electromagnetic brake includes a magnetic yoke, an electromagnetic coil disposed within the magnetic yoke, a fixed plate fixed to the top of the magnetic yoke, an integrated rotor disposed between the fixed plate and the magnetic yoke, an armature disposed between the integrated rotor and the magnetic yoke, and a spring disposed at the bottom of the armature. The other end of the spring is connected to the magnetic yoke. The integrated rotor is coupled to an interface shaft, and a rubber damping ring is provided at the meshing point.

[0008] Preferably, the fixing plate is annular and is fixed to the magnetic yoke by a number of screws.

[0009] Preferably, a steel sleeve is fitted on the outside of the screw, located between the fixing plate and the magnetic yoke.

[0010] Preferably, all of the steel sleeves are movably inserted through the armature to limit the position of the armature.

[0011] Preferably, the integrated rotor is integrally formed from metal or non-metal materials by die casting.

[0012] Preferably, the integrated rotor is integrally formed by die casting from one of the following materials: resin-based, rubber-based, copper, and iron.

[0013] Preferably, the integrated rotor is coaxially fixed with the rubber damping ring.

[0014] Preferably, the integrated rotor and the interface shaft are coupled using a uniform or non-uniform irregular meshing structure.

[0015] Preferably, the shape of the rubber damping ring is adapted to the shape of the meshing point between the integrated rotor and the interface shaft.

[0016] Compared with the prior art, the beneficial effects of this utility model are:

[0017] This invention connects the integrated rotor and the interface shaft in a coupled manner, directly transmitting torque or braking force through physical contact without relying on elastic deformation. It is suitable for scenarios requiring high rigidity connections. Combined with rubber damping rings, it can significantly reduce noise during operation, effectively improve meshing stability, greatly reduce impact loads, and effectively reduce wear rate. Attached Figure Description

[0018] Figure 1 This is a cross-sectional view of an integrated rotor electromagnetic brake proposed in this utility model;

[0019] Figure 2 This is a cross-sectional view showing the position of the rubber damping ring in an integrated rotor electromagnetic brake proposed in this utility model.

[0020] Figure 3 This is a top view of an integrated rotor electromagnetic brake proposed in this utility model;

[0021] Figure 4 This is a three-dimensional schematic diagram of an integrated rotor electromagnetic brake proposed in this utility model.

[0022] In the diagram: 1. Magnetic yoke; 2. Electromagnetic coil; 3. Electromagnetic coil; 4. Spring; 5. Steel sleeve; 6. Rubber damping ring; 7. Fixing plate; 8. Integrated rotor; 9. Interface shaft. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0024] Reference Figures 1-4 An integrated rotor electromagnetic brake includes a magnetic yoke 1, an electromagnetic coil 3 disposed within the magnetic yoke 1, a fixing plate 7 fixed to the top of the magnetic yoke 1, an integrated rotor 8 disposed between the fixing plate 7 and the magnetic yoke 1, an armature disposed between the integrated rotor 8 and the magnetic yoke 1, and a spring 4 disposed at the bottom of the armature. The other end of the spring 4 is connected to the magnetic yoke 1 (a groove is opened at the top of the magnetic yoke 1, and the spring 4 is located in the groove; when the spring 4 is compressed, the armature and the integrated rotor 8 also move into the groove). The integrated rotor 8 is coupled to an interface shaft 9, and a rubber damping ring 6 is provided at the meshing point. The interface shaft 9 moves through the fixing plate 7. Through the elastic buffering effect of the rubber damping ring 6, the vibration energy when the rotor meshes with the interface shaft 9 is effectively absorbed, reducing the direct collision between metal parts and eliminating abnormal noise when the brake is released.

[0025] By connecting the integrated rotor 8 and the interface shaft 9 in a coupled manner, combined with the rubber damping ring 6, the abnormal sound during release can be eliminated through a simple structural design, significantly reducing noise during operation, effectively improving meshing stability, greatly reducing impact load, and effectively reducing wear rate.

[0026] In this embodiment, the fixing plate 7 is in the shape of a ring and is fixed to the magnetic yoke 1 by a number of screws.

[0027] In this embodiment, a steel sleeve 5 is fitted on the outside of the screw between the fixing plate 7 and the magnetic yoke 1. The rigid support frame formed by the magnetic yoke 1, the fixing plate 7, and the steel sleeve 5 provides a uniform magnetic circuit when the electromagnetic coil 3 is energized, reducing hysteresis loss and improving braking response speed.

[0028] In this embodiment, several steel sleeves 5 are movably inserted through the armature to restrict the position of the armature. The through-type limiting design of the steel sleeves 5 ensures that the movement trajectory of the armature is vertically stable and reduces uneven wear.

[0029] In this embodiment, the integrated rotor 8 is integrally formed from metal or non-metal materials by die casting.

[0030] In this embodiment, the integrated rotor 8 is integrally molded from one of the following materials: resin-based, rubber-based, copper, and iron, by die casting. Resin-based and rubber-based materials possess lightweight and vibration-damping properties. Through the viscoelastic properties of polymer materials, they actively absorb the vibration energy when the rotor meshes with the interface shaft 9, further reducing noise. The lightweight design reduces the rotor's inertial torque, decreases energy loss during start-up and shutdown, and improves braking response speed. It also exhibits strong corrosion resistance, making it suitable for humid and chemically corrosive environments (such as food machinery and marine equipment).

[0031] The high rigidity and thermal conductivity of copper / iron-based materials can withstand high torque and high-frequency braking scenarios (such as elevator traction machines and heavy-duty machinery), avoiding material softening due to temperature rise.

[0032] Die casting can achieve high-precision molding of complex and irregular meshing structures, eliminating the assembly gaps and bolt connection points of traditional split rotors, avoiding the risk of vibration amplification and fatigue fracture caused by loosening, and ensuring high material uniformity (no welding or bonding interface), thereby improving the overall bending strength and impact resistance of the rotor, ensuring uniform stress on the meshing surface, and reducing local wear.

[0033] In this embodiment, the integrated rotor 8 is coaxially fixed with the rubber damping ring 6.

[0034] In this embodiment, the integrated rotor 8 and the interface shaft 9 are coupled using a uniform or non-uniform non-uniform meshing structure. The non-uniform meshing structure (uniform or non-uniform) reduces local stress concentration by increasing the contact area, thus avoiding meshing misalignment caused by off-center loading.

[0035] In this embodiment, the shape of the rubber damping ring 6 is adapted to the shape of the meshing point between the integrated rotor 8 and the interface shaft 9. In specific use, it can be annular, regular polygonal, wavy, irregular (star-shaped) and a combination of the above shapes (not shown in the figure).

[0036] Working principle:

[0037] When the electromagnetic coil 3 is energized, it generates a magnetic field. The magnetic yoke 1 guides the magnetic lines of force to the armature. The armature overcomes the force of the spring 4 and is attracted to the bottom of the magnetic yoke 1. At the same time, it drives the integrated rotor 8 to disengage from the interface shaft 9, thereby releasing the brake.

[0038] After the power is cut off, the magnetic field disappears, the spring 4 pushes the armature back to its original position, and the integrated rotor 8 re-engages with the interface shaft 9 under the force of the spring 4.

[0039] During meshing, the rubber damping ring 6 absorbs axial and radial impact forces through elastic deformation, and the irregular meshing structure disperses the load through the gradual contact of the tooth surfaces, avoiding rigid collisions.

[0040] The asymmetric design of irregular meshing surfaces (such as non-uniform structures) can adapt to torque fluctuations at different speeds and achieve dynamic load balance by adjusting the contact area through local deformation.

[0041] The sliding fit between the steel sleeve 5 and the armature allows for small displacement compensation, avoiding jamming caused by thermal expansion or assembly errors.

[0042] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. An integrated rotor electromagnetic brake, characterized in that: It includes a magnetic yoke, an electromagnetic coil disposed within the magnetic yoke, a fixed plate fixed to the top of the magnetic yoke, an integrated rotor disposed between the fixed plate and the magnetic yoke, an armature disposed between the integrated rotor and the magnetic yoke, and a spring disposed at the bottom of the armature. The other end of the spring is connected to the magnetic yoke. The integrated rotor is coupled to the interface shaft, and a rubber damping ring is provided at its meshing point.

2. The integrated rotor electromagnetic brake according to claim 1, characterized in that: The fixing plate is in the shape of a ring and is fixed to the magnetic yoke by a number of screws.

3. The integrated rotor electromagnetic brake according to claim 2, characterized in that: The screw is fitted with a steel sleeve located between the fixing plate and the magnetic yoke.

4. The integrated rotor electromagnetic brake according to claim 3, characterized in that: Several of the aforementioned steel sleeves are movably inserted through the armature to limit the position of the armature.

5. The integrated rotor electromagnetic brake according to claim 1, characterized in that: The integrated rotor is integrally formed from metal or non-metal materials by die casting.

6. An integrated rotor electromagnetic brake according to claim 5, characterized in that: The integrated rotor is integrally formed by die casting from one of the following materials: resin-based, rubber-based, copper, and iron.

7. The integrated rotor electromagnetic brake according to claim 1, characterized in that: The integrated rotor is coaxially fixed with the rubber damping ring.

8. The integrated rotor electromagnetic brake according to claim 1, characterized in that: The integrated rotor and the interface shaft are coupled using a uniform or non-uniform irregular meshing structure.

9. An integrated rotor electromagnetic brake according to claim 8, characterized in that: The shape of the rubber damping ring is adapted to the shape of the meshing point between the integrated rotor and the interface shaft.

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