Hollow magnetic powder clutch

Abstract

The utility model relates to mechanical transmission control technical field especially a hollow type magnetic particle clutch, including first magnetic yoke, second magnetic yoke, output shaft and input shaft, when this device coil is not electrified, the magnetic powder in inside is attached to the cavity inner wall loosedly under centrifugal force, at this moment, input shaft rotates, but output shaft will not follow, when coil is electrified, produces the magnetic field, and the magnetic powder is arranged into chain structure along the magnetic force line rapidly, will drive part and driven part lock together tightly to transmit the torque, this device output shaft center is equipped with through -hole, hollow shaft design can reduce equipment weight and volume, conveniently install in the system of compact space, promote the flexibility of overall layout, and hollow shaft design can be applicable to the scene that needs to transmit power and pass through other shafts or equipment simultaneously, and the output shaft is evenly arranged high magnetic permeability magnetic powder in the magnetic gap of outside, combines the geometric characteristic of hollow shaft, can strengthen the magnetic field uniformity, improve control accuracy.

Description

Technical Field

[0001] This utility model relates to the field of mechanical transmission control technology, and in particular to a hollow magnetic powder clutch. Background Technology

[0002] A clutch is a component that engages or disengages two shafts as needed during machine operation. Among them, a magnetic powder clutch is an automatic control element that uses magnetic powder as a medium to transmit torque based on electromagnetic principles.

[0003] In existing technologies, traditional magnetic powder clutches mostly adopt a solid shaft structure. In applications with tight space or requiring a shaft to pass through the middle, there are problems such as inconvenient installation and structural redundancy. Especially when transmitting torque in the 5kg range, the solid shaft design may increase the weight and size of the equipment, affecting the flexibility of the overall layout. In addition, some traditional clutches still have room for improvement in terms of response speed and torque control linearity. Utility Model Content

[0004] To address the aforementioned problems in the existing technology, a hollow magnetic powder clutch is provided.

[0005] The specific technical solution is as follows: A hollow magnetic powder clutch is designed, comprising a first magnetic yoke, a second magnetic yoke, an output shaft, and an input shaft. The second magnetic yoke is fixedly connected to one side of the first magnetic yoke. Coils are fixedly connected inside the first magnetic yoke and the second magnetic yoke. A first cover plate is fastened to the side of the first magnetic yoke away from the second magnetic yoke, and a second cover plate is fastened to the side of the second magnetic yoke away from the first magnetic yoke. The output shaft is located at the center of the first magnetic yoke and the second magnetic yoke. An input shaft is provided on the outside of the output shaft. An input flange is connected to one side of the input shaft via a key. The outer ring of a fourth bearing is connected to the center of the input flange by a sleeve. The inner ring of the fourth bearing is connected to the output shaft by a sleeve. A third retaining ring is provided on one side of the fourth bearing and is connected to one side of the output shaft by a snap-fit. Magnetic powder is filled between the output shaft and the input shaft.

[0006] Preferably, the end of the input shaft away from the input flange is fastened to a heat sink, the center of the heat sink is connected to the outer ring of the second bearing by a sleeve, the inner ring of the second bearing is connected to the output shaft by a sleeve, and a second retaining ring is provided on one side of the second bearing, which is connected to the output shaft by a snap-fit.

[0007] Preferably, a first inner lip spacer is provided on the side of the second bearing away from the second retaining ring. The first inner lip spacer is fixedly connected to the output shaft. A second inner lip spacer is fixedly connected to the end of the output shaft away from the first inner lip spacer. A fourth inner lip spacer is provided on the outside of the second inner lip spacer. A third inner lip spacer is provided on the inside of the second inner lip spacer. The third inner lip spacer and the fourth inner lip spacer are fixedly connected inside the input shaft.

[0008] Preferably, the center of the first magnetic yoke is connected to the outer ring of the first bearing by a sleeve, the inner ring of the first bearing is connected to the output shaft by a sleeve, and a first retaining ring is provided on one side of the first bearing, which is connected to one side of the output shaft by a snap-fit.

[0009] Preferably, the center of the second cover plate is connected to the outer ring of the third bearing by a sleeve, and the inner ring of the third bearing is connected to the input shaft by a sleeve.

[0010] The above technical solution has the following advantages or beneficial effects: 1. The output shaft of this device has a through hole in the center. The hollow shaft design can reduce the weight and volume of the equipment, making it easy to install in a space-constrained system and improving the flexibility of the overall layout. The hollow shaft design is also suitable for scenarios that require simultaneous power transmission and passage through other shafts or equipment, such as the synchronous transmission system in textile machinery.

[0011] 2. High-permeability magnetic powder is uniformly arranged in the magnetic gap between the output shaft and the outside. Combined with the geometric characteristics of the hollow shaft, the uniformity of the magnetic field can be enhanced, ensuring that the excitation current and the transmitted torque are linearly related, improving control accuracy, and significantly accelerating the response speed. It is suitable for high-speed dynamic adjustment scenarios.

[0012] 3. The overall structure of this device is relatively simple. Compared with the traditional magnetic powder clutch, it reduces external components, which facilitates subsequent installation and maintenance. In addition, this device transmits torque by controlling magnetic flux through coils, eliminating mechanical contact, reducing vibration and wear, extending service life, reducing failure rate, and eliminating friction loss, which can save energy and reduce operating costs. 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 main structure of a hollow magnetic powder clutch proposed in this utility model; Figure 2 This is a rear view schematic diagram of a hollow magnetic powder clutch proposed in this utility model. Figure 3The exploded left view of the hollow magnetic powder clutch proposed in this utility model. Figure 4 The exploded view of the right side of the hollow magnetic powder clutch proposed in this utility model; Figure 5 This is a cross-sectional view of a hollow magnetic powder clutch proposed in this utility model.

[0015] The reference numerals in the above figures represent: 1. First magnetic yoke; 2. Second magnetic yoke; 3. Output shaft; 4. First snap ring; 5. First cover plate; 6. First bearing; 7. Heat sink; 8. Second snap ring; 9. Second bearing; 10. First inner lip spacer; 11. Second inner lip spacer; 12. Coil; 13. Third inner lip spacer; 14. Fourth inner lip spacer; 15. Input shaft; 16. Third bearing; 17. Second cover plate; 18. Input flange; 19. Fourth bearing; 20. Third snap ring. 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 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 1-5A hollow magnetic powder clutch includes a first magnetic yoke 1, a second magnetic yoke 2, an output shaft 3, and an input shaft 15. The second magnetic yoke 2 is fixedly connected to one side of the first magnetic yoke 1. A coil 12 is fixedly connected inside the first magnetic yoke 1 and the second magnetic yoke 2. A first cover plate 5 is fastened to the side of the first magnetic yoke 1 away from the second magnetic yoke 2, and a second cover plate 17 is fastened to the side of the second magnetic yoke 2 away from the first magnetic yoke 1. The output shaft 3 is located at the center of the first magnetic yoke 1 and the second magnetic yoke 2. An input shaft 15 is located on the outside of the output shaft 3. An input flange 18 is connected to one side of the input shaft 15 via a key. The center of the input flange 18 is connected to the outer ring of a fourth bearing 19 via a sleeve connection. The inner ring of the fourth bearing 19 is connected to the output shaft 3 via a sleeve connection. A third retaining ring 20 is located on one side of the fourth bearing 19 and is connected to one side of the output shaft 3 via a snap-fit ​​connection. Magnetic powder is filled between the output shaft 3 and the input shaft 15. The magnetic yoke serves as the body of the magnetic powder brake. The actuator provides a stable working cavity. Coil 12, as the core component for controlling the torque of the magnetic powder brake, provides the basis for adjustable magnetic field force in the working cavity. The input flange is made of high-strength carbon steel to ensure stable operation of the magnetic powder brake. The input and output shafts are made of high-permeability materials and their concentricity must be ensured. The cover plate of this device is made of high-strength aluminum alloy and integrates heat dissipation design. This ensures effective safety protection for the operation of the magnetic powder brake while also providing effective heat dissipation for the working cavity. This prevents the magnetic powder brake from malfunctioning due to overheating during long-term operation, thus extending the service life of the magnetic powder brake. The magnetic powder filled inside this device should preferably be high-temperature resistant, such as iron-cobalt-nickel based alloy magnetic powder, to enhance stability. The model of this device is XW-NPC-5KG-1. During assembly, coil 12 must first be fixed around the magnetic gap, and then the magnetic powder is injected and sealed to form a closed magnetic field path.

[0020] Furthermore, the end of the input shaft 15 away from the input flange 18 is fastened to a heat sink 7. The center of the heat sink 7 is connected to the outer ring of the second bearing 9 by a sleeve, and the inner ring of the second bearing 9 is connected to the output shaft 3 by a sleeve. A second snap ring 8 is provided on one side of the second bearing 9, and the second snap ring 8 is connected to the output shaft 3 by a snap. The heat sink 7 is used to dissipate heat from the working chamber, so 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.

[0021] Furthermore, a first inner lip partition 10 is provided on the side of the second bearing 9 away from the second retaining ring 8. The first inner lip partition 10 is fixedly connected to the output shaft 3. The end of the output shaft 3 away from the first inner lip partition 10 is fixedly connected to the second inner lip partition 11. A fourth inner lip partition 14 is provided on the outside of the second inner lip partition 11. A third inner lip partition 13 is provided on the inside of the second inner lip partition 11. The third inner lip partition 13 and the fourth inner lip partition 14 are fixedly connected inside the input shaft 15. The inner lip partitions are used to block the magnetic powder and prevent leakage.

[0022] Furthermore, the center of the first magnetic yoke 1 is connected to the outer ring of the first bearing 6 by a sleeve, and the inner ring of the first bearing 6 is connected to the output shaft 3 by a sleeve. A first retaining ring 4 is provided on one side of the first bearing 6, and the first retaining ring 4 is connected to one side of the output shaft 3 by a snap-fit. The various components of this device that are sleeved on the output shaft 3 are axially fixed by retaining rings.

[0023] Furthermore, the center of the second cover plate 17 is connected to the outer ring of the third bearing 16 by a sleeve, and the inner ring of the third bearing 16 is connected to the input shaft 15 by a sleeve. The bearings of this device are used to reduce friction and ensure the smooth operation of the magnetic powder brake at high speed.

[0024] Working principle: When coil 12 is not energized, the internal magnetic powder is loosely attached to the inner wall of the cavity under centrifugal force. At this time, the input shaft 15 rotates, but the output shaft 3 does not follow, and the clutch is in the disengaged state. When coil 12 is energized, a magnetic field is generated, and the magnetic powder quickly arranges into a chain structure along the magnetic field lines, tightly locking the active and driven parts together, thereby transmitting torque. The clutch is in the engaged state. The output shaft 3 of this device has a through hole in the center. The hollow shaft design can reduce the weight and volume of the equipment, making it easy to install in a space-constrained system and improving the flexibility of the overall layout. The hollow shaft design is also suitable for scenarios that need to transmit power and pass through other shafts or equipment at the same time. High-permeability magnetic powder is evenly arranged in the magnetic gap between the output shaft 3 and the outside. Combined with the geometric characteristics of the hollow shaft, the uniformity of the magnetic field can be enhanced, ensuring that the excitation current and the transmitted torque are linearly related, improving control accuracy. This device controls the magnetic flux to transmit torque through coil 12, eliminating mechanical contact, reducing vibration and wear, extending service life, reducing failure rate, and eliminating friction loss, which can save energy and reduce operating costs.

[0025] 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 hallow magnetic powder clutch, characterized by: The system includes a first yoke (1), a second yoke (2), an output shaft (3), and an input shaft (15). The second yoke (2) is fixedly connected to one side of the first yoke (1). A coil (12) is fixedly connected inside the first yoke (1) and the second yoke (2). A first cover plate (5) is fastened to the side of the first yoke (1) away from the second yoke (2). A second cover plate (17) is fastened to the side of the second yoke (2) away from the first yoke (1). The output shaft (3) is located between the first yoke (1) and the second yoke (2). At the center, an input shaft (15) is provided on the outside of the output shaft (3). An input flange (18) is connected to one side of the input shaft (15) by a key. The outer ring of the fourth bearing (19) is connected to the center of the input flange (18) by a sleeve. The inner ring of the fourth bearing (19) is connected to the output shaft (3) by a sleeve. A third snap ring (20) is provided on one side of the fourth bearing (19). The third snap ring (20) is connected to one side of the output shaft (3) by a snap. Magnetic powder is filled between the output shaft (3) and the input shaft (15).

2. A hallow magnetic powder clutch according to claim 1, wherein: The input shaft (15) is fastened to a heat sink (7) at one end away from the input flange (18). The center of the heat sink (7) is connected to the outer ring of the second bearing (9) by a sleeve. The inner ring of the second bearing (9) is connected to the output shaft (3) by a sleeve. A second snap ring (8) is provided on one side of the second bearing (9). The second snap ring (8) is connected to the output shaft (3) by a snap.

3. A hallow magnetic powder clutch according to claim 2, wherein: The second bearing (9) has a first inner lip partition (10) on the side away from the second snap ring (8). The first inner lip partition (10) is fixedly connected to the output shaft (3). The output shaft (3) is fixedly connected to a second inner lip partition (11) at the end away from the first inner lip partition (10). A fourth inner lip partition (14) is provided on the outside of the second inner lip partition (11). A third inner lip partition (13) is provided on the inside of the second inner lip partition (11). The third inner lip partition (13) and the fourth inner lip partition (14) are fixedly connected inside the input shaft (15).

4. A hallow magnetic powder clutch according to claim 1, wherein: The center of the first magnetic yoke (1) is connected to the outer ring of the first bearing (6) by a sleeve, and the inner ring of the first bearing (6) is connected to the output shaft (3) by a sleeve. A first snap ring (4) is provided on one side of the first bearing (6), and the first snap ring (4) is connected to one side of the output shaft (3) by a snap.

5. A hallow magnetic powder clutch according to claim 1, wherein: The center of the second cover plate (17) is connected to the outer ring of the third bearing (16) by a sleeve, and the inner ring of the third bearing (16) is connected to the input shaft (15) by a sleeve.

Images