Single-shaft magnetic powder brake

Abstract

The utility model relates to the technical field of magnetic powder brake, especially a single -shaft magnetic powder brake, including brake axle main part, brake axle sleeve and front clamping spring, the through -hole is established in brake axle sleeve middle part, the inside with interference fit form connection front bearing outer wall in the through -hole, the front bearing inside with interference fit form connection brake axle main part top portion, front clamping spring is provided with in the front bearing top portion, and then the front clamping spring is fixed on brake axle main part through front clamping spring, then the front bearing and rear bearing are connected with interference fit form on brake axle sleeve, through the double fixing of through -hole, front clamping spring and rear clamping spring on brake axle sleeve, can effectively reduce vibration and displacement, and through the fixing of front clamping spring and rear clamping spring, do not need to use a large number of fixing devices, improve the stability of brake, save time and improve work efficiency effectively.

Description

Technical Field

[0001] This utility model relates to the field of magnetic powder brake technology, and in particular to a single-axis magnetic powder brake. Background Technology

[0002] Single-axis magnetic powder brakes can transmit a certain torque regardless of slip, and have advantages such as fast response, simple structure, no pollution, no noise, no impact vibration, and energy saving. They are a versatile and high-performance automatic control component, and are now widely used in unwinding and rewinding tension control in papermaking, printing, plastics, rubber, textiles, dyeing, wire and cable, metallurgy, tablet presses, and other related winding processing industries.

[0003] The installation of existing single-axis magnetic powder brakes usually requires complex fixing devices and long operation time, resulting in insufficient stability, which leads to time and labor costs and reduced work efficiency.

[0004] Furthermore, existing single-axis magnetic powder brakes are prone to response delays due to residual magnetism at the moment of power failure of the excitation coil during frequent start-stop or high-speed operation, which affects the operating accuracy of the equipment and reduces the effectiveness of the brake. Utility Model Content

[0005] In view of the above-mentioned problems in the prior art, a single-axis magnetic powder brake is provided.

[0006] The specific technical solution is as follows: A single-axis magnetic powder brake includes a brake shaft body, a brake shaft sleeve, and a front retaining ring. The brake shaft sleeve has a through hole in the middle. The through hole is connected to the outer wall of a front bearing in an interference fit. The front bearing is connected to the top of the brake shaft body in an interference fit. A front retaining ring is provided on the top of the front bearing. The front retaining ring is connected to the brake shaft body by a snap-fit. A front magnetic yoke is provided at the bottom of the brake shaft sleeve, and a rear magnetic yoke is provided below the front magnetic yoke.

[0007] Preferably, the bottom of the brake bushing is connected to the front magnetic yoke by fasteners, and the front magnetic yoke is connected to the rear magnetic yoke by fasteners.

[0008] Preferably, a coil is disposed inside the space between the front magnetic yoke and the rear magnetic yoke, and the bottom of the rear magnetic yoke is connected to the rear cover by fasteners.

[0009] Preferably, a stator is provided inside the front magnetic yoke and the rear magnetic yoke, and the bottom of the stator is connected to the top of the rear cover by fasteners.

[0010] Preferably, the bottom of the brake shaft is connected to a heat sink via a fastener, and the heat sink is connected to the inside of the rear cover by rotation.

[0011] Preferably, a rear bearing is provided below the front bearing, the outer wall of the rear bearing is connected to the through hole in an interference fit, and a rear retaining ring is provided at the bottom of the rear bearing, which is connected to the brake shaft body by a snap-fit.

[0012] The above technical solution has the following advantages or beneficial effects: 1. By setting a brake bushing and a front retaining ring, when the brake needs to be assembled, the rear bearing is fixed to the drive rod of the brake shaft body by the rear retaining ring, and then the front bearing is fixed to the brake shaft body by the front retaining ring. Then, the front bearing and the rear bearing are connected to the brake bushing in the form of an interference fit. Through the through hole on the brake bushing, the double fixation of the front retaining ring and the rear retaining ring, vibration and displacement can be effectively reduced. At the same time, through the fixation of the front retaining ring and the rear retaining ring, there is no need to use a large number of fixing devices, which improves the stability of the brake, saves time and effort, and effectively improves work efficiency; 2. By setting The front and rear magnetic yokes improve the stability of the brake's operation. Magnetic powder is placed inside the space between the front and rear magnetic yokes. Through the metal ring outside the stator, which is a non-magnetic conductive ring made of copper or aluminum, located on the magnetic pole surface of the stator, according to the principle of electromagnetic induction, when the coil is de-energized and the main magnetic field disappears, the changing magnetic field will induce eddy currents in the short-circuit ring. These eddy currents will generate a magnetic field opposite to the direction of the residual magnetic field, thereby accelerating the cancellation of magnetic residue. This achieves a millisecond-level rapid disengagement response, which is particularly suitable for applications requiring high-frequency, high-precision start-stop, improving the control accuracy of the entire device and demonstrating its practicality. Attached Figure Description

[0013] Embodiments of the present invention will be described more fully with reference to the accompanying drawings. However, the accompanying drawings are for illustration and explanation only and do not constitute a limitation on the scope of the present invention.

[0014] Figure 1 This is a schematic diagram of the structure of a single-axis magnetic powder brake proposed in this utility model; Figure 2 This is a cross-sectional view of a single-axis magnetic powder brake proposed in this utility model; Figure 3 An exploded view of a single-axis magnetic powder brake proposed in this utility model; Figure 4 This invention provides a schematic diagram of the front and rear retaining rings in a single-axis magnetic powder brake.

[0015] The above-mentioned reference numerals indicate: 1. Brake shaft body; 2. Brake shaft sleeve; 3. Rear cover; 4. Front magnetic yoke; 5. Rear magnetic yoke; 6. Front bearing; 7. Front snap ring; 8. Stator; 9. Coil; 10. Heat sink; 11. Rear bearing; 12. Rear snap ring; 13. Through hole. Detailed Implementation

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

[0017] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments of the present invention can be combined with each other.

[0018] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, but this is not intended to limit the present invention.

[0019] Reference Figure 1-4 A single-axis magnetic powder brake includes a brake shaft body 1, a brake shaft sleeve 2, and a front retaining ring 7. A through hole 13 is formed in the middle of the brake shaft sleeve 2. The through hole 13 is internally connected to the outer wall of a front bearing 6 via an interference fit. The front bearing 6 is internally connected to the top of the brake shaft body 1 via an interference fit. A front retaining ring 7 is located on the top of the front bearing 6 and is connected to the brake shaft body 1 via a snap-fit ​​connection. A front magnetic yoke 4 is located at the bottom of the brake shaft sleeve 2, and a rear magnetic yoke 5 is located below the front magnetic yoke 4. When assembling the brake, the rear bearing 1... 1. The rear retaining ring 12 is fixed to the drive rod of the brake shaft body 1, and the front bearing 6 is fixed to the brake shaft body 1 by the front retaining ring 7. Then, the front bearing 6 and the rear bearing 11 are connected to the brake shaft sleeve 2 by interference fit. Through the through hole 13 on the brake shaft sleeve 2, the front retaining ring 7 and the rear retaining ring 12, the vibration and displacement can be effectively reduced. At the same time, through the fixation of the front retaining ring 7 and the rear retaining ring 12, there is no need to use a lot of fixing devices, which improves the stability of the brake, saves time and effort and effectively improves work efficiency.

[0020] Furthermore, the bottom of the brake bushing 2 is connected to the front magnetic yoke 4 via fasteners, and the front magnetic yoke 4 is connected to the rear magnetic yoke 5 via fasteners. The brake bushing 2 is a key innovative component for achieving "quick installation". It is firmly connected to the brake body via flange and snap ring, and has a standardized through hole 13 reserved. This allows the entire brake to be fixed to the equipment base as a whole module directly through the holes on the bushing with screws, greatly simplifying the alignment and fixing process. The brake shaft body 1 is the output shaft for power input. It needs to be connected to the controlled rotating parts. One end of the shaft is connected to the load via a keyway or coupling, and the other end extends into the brake and is connected to the rotor. High-strength carbon steel is used to ensure that it has sufficient strength and wear resistance when transmitting torque and to ensure long-term operational stability. The rotor and output shaft are integrally formed.

[0021] Furthermore, a coil 9 is housed within the space between the front yoke 4 and the rear yoke 5. The bottom of the rear yoke 5 is connected to the rear cover 3 via fasteners. The front yoke 4 and the rear yoke 5 form the main structural components and part of the magnetic circuit of the brake. They are typically made of low-carbon steel with good magnetic permeability, forming a closed shell working cavity that houses the magnetic powder, rotor, and stator 8. The coil 9 is responsible for guiding the magnetic lines of force to form an effective magnetic circuit. It is the control core of the device; when an external controller supplies direct current to the coil 9, a magnetic field is generated. The magnetic field strength is proportional to the current, thereby controlling the degree of solidification of the magnetic powder and ultimately precisely controlling the output torque.

[0022] Furthermore, a stator 8 is provided inside the front magnetic yoke 4 and the rear magnetic yoke 5. The bottom of the stator 8 is connected to the top of the rear cover 3 by fasteners. As a key component for the magnetic powder brake to realize the braking function, the stator 8 ensures the stability of the magnetic powder brake during operation. The stator 8 has an excitation coil 9 embedded inside, which is the stationary part that generates the working magnetic field. The stability of its structure is directly related to the magnetic circuit efficiency and the smoothness of the braking effect. The rear end of the brake is sealed to protect internal components such as the coil 9 and magnetic powder from dust and moisture corrosion. The use of high-strength aluminum alloy not only ensures the structural strength, but also utilizes the excellent thermal conductivity of aluminum alloy to play an auxiliary role in heat dissipation.

[0023] Furthermore, the bottom of the brake shaft is connected to the heat sink 10 by fasteners. The heat sink 10 is connected to the inside of the rear cover 3 by rotation. When the brake shaft body 1 rotates, its bottom will simultaneously drive the heat sink 10 to rotate, providing an effective heat dissipation component for the working chamber. This ensures that the magnetic powder brake will not fail due to overheating during long-term operation, thus extending the service life of the magnetic powder brake.

[0024] Furthermore, a rear bearing 11 is provided below the front bearing 6. The outer wall of the rear bearing 11 is connected to the through hole 13 in the form of an interference fit. A rear retaining ring 12 is provided at the bottom of the rear bearing 11. The rear retaining ring 12 is connected to the brake shaft body 1 by a snap-fit. The double fixation of the fixing rod and the through hole 13, and the slider and the retaining ring mechanism, reduces vibration and displacement and extends service life. Through the design of the slider and the limiting mechanism, the installation time is greatly shortened and the operation is simple. The fixing rod is fitted with the brake shaft and the through hole 13 of the brake shaft sleeve 2 and the sliding bearing. The retaining ring is used for limiting and fixing to form a double fixing and limiting effect.

[0025] Working principle: When using this device, firstly, when assembling the brake, the rear bearing 11 is fixed to the drive rod of the brake shaft body 1 by the rear snap ring 12. Then, the front bearing 6 is fixed to the brake shaft body 1 by the front snap ring 7. Then, the front bearing 6 and the rear bearing 11 are connected to the brake shaft sleeve 2 by interference fit. Through the through hole 13 on the brake shaft sleeve 2, the front snap ring 7 and the rear snap ring 12 double fixation can effectively reduce vibration and displacement. At the same time, through the fixation of the front snap ring 7 and the rear snap ring 12, magnetic powder is set in the space between the front magnetic yoke 4 and the rear magnetic yoke 5. Through the metal ring outside the stator 8, the metal ring is a non-magnetic conductive ring made of copper or aluminum, which is located on the magnetic pole surface of the stator 8. According to the principle of electromagnetic induction, when the coil 9 is de-energized and the main magnetic field disappears, the changing magnetic field will induce eddy currents in the short-circuit ring. This eddy current will generate a magnetic field opposite to the direction of the residual magnetic field, thereby accelerating the cancellation of the magnetic residue, thus completing the work.

[0026] The above description is only a preferred embodiment of the present utility model and does not limit the implementation method and protection scope of the present utility model. Those skilled in the art should realize that all solutions obtained by equivalent substitutions and obvious changes made based on the description and illustrations of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A single-axis magnetic powder brake, characterized in that: The device includes a brake shaft body (1), a brake shaft sleeve (2), and a front retaining ring (7). The brake shaft sleeve (2) has a through hole (13) in the middle. The through hole (13) is connected to the outer wall of the front bearing (6) in an interference fit. The front bearing (6) is connected to the top of the brake shaft body (1) in an interference fit. The top of the front bearing (6) is provided with a front retaining ring (7). The front retaining ring (7) is connected to the brake shaft body (1) by snapping. The bottom of the brake shaft sleeve (2) is provided with a front magnetic yoke (4), and the bottom of the front magnetic yoke (4) is provided with a rear magnetic yoke (5).

2. A single-axis magnetic powder brake according to claim 1, characterized in that: The bottom of the brake bushing (2) is connected to the front magnetic yoke (4) by fasteners, and the front magnetic yoke (4) is connected to the rear magnetic yoke (5) by fasteners.

3. A single-axis magnetic powder brake according to claim 2, characterized in that: A coil (9) is provided inside the space between the front magnetic yoke (4) and the rear magnetic yoke (5), and the bottom of the rear magnetic yoke (5) is connected to the rear cover (3) by fasteners.

4. A single-axis magnetic powder brake according to claim 3, characterized in that: The front magnetic yoke (4) and the rear magnetic yoke (5) are provided with stators (8), and the bottom of the stators (8) is connected to the top of the rear cover (3) by fasteners.

5. A single-axis magnetic powder brake according to claim 3, characterized in that: The bottom of the brake bushing (2) is connected to the heat sink (10) by fasteners, and the heat sink (10) is connected to the inside of the rear cover (3) by rotation.

6. A single-axis magnetic powder brake according to claim 1, characterized in that: A rear bearing (11) is provided below the front bearing (6). The outer wall of the rear bearing (11) is connected to the through hole (13) in an interference fit. A rear retaining ring (12) is provided at the bottom of the rear bearing (11). The rear retaining ring (12) is connected to the brake shaft body (1) by a snap-fit.

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