Low-noise magnetic powder clutch

Abstract

The utility model relates to the technical field of magnetic powder clutches, and discloses a low-noise magnetic powder clutch which comprises a machine shell, and a first driving shaft is arranged on the right side of the machine shell. According to the low-noise magnetic powder clutch, after the magnet exciting coil is powered on, the magnetic powder braking unit starts to distribute magnetic powder through the first magnetic powder distributing pipeline and the second magnetic powder distributing pipeline, a dotted line closed loop is formed, a magnetic medium in a flowing state starts to be solidified in a magnetic field, and when the magnetic field intensity is large, the magnetic powder almost becomes a solid; meanwhile, magnetic powder particles between the electromagnet and the second driven disc form magnetic linkages, the first driving disc and the electromagnet are connected together, if the current passing through an electromagnet coil is larger, the number of the magnetic linkages is larger, the magnetic linkages are stronger, and when the magnetic linkages are larger and stronger, the torque transmission capacity of the magnetic powder clutch is larger; the vibration absorber can counteract vibration generated in the flux linkage forming process, and the first throttling valve and the second throttling valve control the laying speed of the magnetic powder so as to control noise.

Description

Technical Field

[0001] The utility model relates to the technical field of magnetic powder clutches, and particularly relates to a low-noise magnetic powder clutch. Background Technique

[0002] A magnetic powder clutch, also known as an electromagnetic powder clutch or a magnetic powder type clutch, is based on the electromagnetic principle and uses magnetic powder to transmit torque. It has a basically linear relationship between the exciting current and the transmitted torque. It can transmit a certain torque regardless of the slip, and has the advantages of fast response speed, simple structure, no pollution, no noise, no impact vibration, and energy saving. It is a multi-purpose and superior performance automatic control element. Classified by shaft type, there are: double-shaft magnetic powder clutches, hollow shaft magnetic powder clutches, and hollow shaft magnetic powder clutches. Classified by cooling method, there are: self-cooling type, air-cooling type, and water-cooling type, etc.

[0003] The existing patent CN201606426U for magnetic powder clutches proposes that the outer part of the rotating shaft of the present utility model is sleeved with a first inner sleeve and a second inner sleeve that are butt-jointed. The outer parts of the first inner sleeve and the second inner sleeve are provided with a first outer shell and a second outer shell that are butt-jointed. First rolling bearings are respectively arranged between the two ends of the rotating shaft and the first inner sleeve and the second inner sleeve. Second rolling bearings are respectively arranged between the first outer shell and the second inner sleeve and between the second outer shell and the first inner sleeve. First snap rings and second snap rings are arranged outside the first rolling bearing and the second rolling bearing. Exciting coils are arranged at the joints between the first outer shell, the second outer shell, the first inner sleeve, and the second inner sleeve. A sealing ring is sleeved on the rotating shaft, and a magnetic powder chamber is formed between the sealing ring and the inner walls of the first inner sleeve and the second inner sleeve. Its structural design is scientific and simple, with a small volume, convenient for use and installation, and can be installed in multiple directions without being restricted by the position.

[0004] However, although the existing patent CN201606426U has a scientific and simple design, a small volume, convenient for use and installation, and can be installed in multiple directions without being restricted by the position, when the magnetic powder inside the magnetic powder clutch moves under the action of the electromagnetic field, some noise may be generated. Content of the Utility Model

[0005] (I) Technical Problems to be Solved

[0006] The purpose of the present utility model is to provide a low-noise magnetic powder clutch to solve the problem that when the magnetic powder inside the magnetic powder clutch moves under the action of the electromagnetic field, some noise may be generated as mentioned in the above technical problems in the above background technique.

[0007] (II) Technical Solutions

[0008] To achieve the above object, the present utility model provides the following technical solutions: a low-noise magnetic powder clutch, including a machine shell, a first drive shaft is arranged on the right side of the machine shell, a second driven shaft is arranged on the left side of the machine shell, and a clamping ring is arranged inside the connection of the first drive shaft and the machine shell.

[0009] Preferably, an excitation coil is arranged in the middle of the first drive shaft and the second driven shaft, and an electromagnet is fixedly arranged on the left side of the excitation coil. When the excitation coil is powered on, the magnetic powder braking unit starts to distribute magnetic powder through the magnetic powder distribution pipeline 1 and the magnetic powder distribution pipeline 2 to form a dotted closed loop, and the flowing magnetic medium starts to solidify in the magnetic field.

[0010] Preferably, a first driving disc is arranged inside the connection of the second driven shaft and the machine shell, and a magnetic powder braking unit is arranged at the upper end inside the machine shell. When the magnetic field strength is very large, the magnetic powder almost becomes a solid, and at the same time, magnetic powder particles form magnetic chains between the electromagnet and the second driven disc, connecting the first driving disc and the electromagnet together.

[0011] Preferably, heat sinks are fixedly arranged on the left and right sides of the inner end of the machine shell, and a support block is fixedly arranged at the lower end of the magnetic powder braking unit. If the current passing through the electromagnet coil is larger, then the number of magnetic chains is more, and the magnetic chains are also stronger.

[0012] Preferably, a shock absorber is fixedly arranged below the magnetic powder braking unit, and a magnetic powder distribution pipeline 1 is fixedly arranged on the right side below the shock absorber. The shock absorber can offset the vibration generated during the formation of magnetic chains. When the magnetic chains are many and strong, the torque transmission capacity of the magnetic powder clutch is greater.

[0013] Preferably, a throttle valve 1 is fixedly arranged below the magnetic powder distribution pipeline 1, and a magnetic powder distribution pipeline 2 is fixedly arranged on the left side below the shock absorber. The shock absorber can offset the vibration generated during the formation of magnetic chains. Preferably, a throttle valve 2 is fixedly arranged below the magnetic powder distribution pipeline 2, the throttle valve 2 is fixedly arranged to the left of the throttle valve 1, and a second driven disc is arranged outside the first driving disc. The throttle valve 1 and the throttle valve 2 control the speed of magnetic powder distribution, and thus control the noise.

[0014] Compared with the prior art, the beneficial effects of the present utility model are:

[0015] 1. For this low-noise magnetic powder clutch, when the excitation coil is energized, the magnetic powder braking unit starts to distribute magnetic powder through magnetic powder distribution pipeline 1 and magnetic powder distribution pipeline 2, forming a dotted closed loop. The flowing magnetic medium begins to solidify in the magnetic field. When the magnetic field strength is very high, the magnetic powder almost becomes a solid. At the same time, magnetic powder particles form magnetic chains between the electromagnet and driven disk 2, connecting driving disk 1 and the electromagnet. If the current passing through the electromagnet coil is greater, then the number of magnetic chains is more, and the magnetic chains are also stronger. When the magnetic chains are numerous and strong, the torque transmission capacity of the magnetic powder clutch is greater. The shock absorber can cancel out the vibration generated during the formation of magnetic chains.

[0016] 2. For this low-noise magnetic powder clutch, the heat sink is provided to facilitate the heat dissipation inside the casing. Throttle valve 1 and throttle valve 2 control the speed of magnetic powder distribution, thereby controlling the noise. Description of the Drawings

[0017] Figure 1 is a three-dimensional structural schematic diagram of the present utility model;

[0018] Figure 2 is a sectional structural schematic diagram of the present utility model;

[0019] Figure 3 is a partial sectional structural schematic diagram of the present utility model;

[0020] Figure 4 is a partial sectional structural schematic diagram of the present utility model.

[0021] In the figure: 1. Casing; 2. First drive shaft; 3. Second driven shaft; 4. Clip ring; 5. Excitation coil; 6. Electromagnet; 7. Driving disk 1; 8. Magnetic powder braking unit; 9. Heat sink; 10. Support block; 11. Shock absorber; 12. Magnetic powder distribution pipeline 1; 13. Throttle valve 1; 14. Magnetic powder distribution pipeline 2; 15. Throttle valve 2; 16. Driven disk 2. Detailed Embodiment

[0022] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0023] Please refer to Figures 1 - 4 , the present utility model provides a technical solution: a low-noise magnetic powder clutch, including a casing 1. A first drive shaft 2 is provided on the right side of the casing 1, a second driven shaft 3 is provided on the left side of the casing 1, and a clip ring 4 is provided inside the connection between the first drive shaft 2 and the casing 1.

[0024] An excitation coil 5 is provided in the middle of the first drive shaft 2 and the second driven shaft 3. An electromagnet 6 is fixedly provided on the left side of the excitation coil 5. An active disk one 7 is provided on the inner side of the connection between the second driven shaft 3 and the housing 1. A magnetic powder brake unit 8 is provided at the upper end inside the housing 1. Heat sinks 9 are fixedly provided on the left and right sides of the inner end of the housing 1. A support block 10 is fixedly provided at the lower end of the magnetic powder brake unit 8. A shock absorber 11 is fixedly provided below the magnetic powder brake unit 8. A magnetic powder distribution pipeline one 12 is fixedly provided on the right side below the shock absorber 11. A throttle valve one 13 is fixedly provided below the magnetic powder distribution pipeline one 12. A magnetic powder distribution pipeline two 14 is fixedly provided on the left side below the shock absorber 11. A throttle valve two 15 is fixedly provided below the magnetic powder distribution pipeline two 14. The throttle valve two 15 is fixedly provided to the left of the throttle valve one 13. A driven disk two 16 is provided outside the active disk one 7. When using a low-noise magnetic powder clutch, when the excitation coil 5 is energized, the magnetic powder brake unit 8 starts to distribute magnetic powder through the magnetic powder distribution pipeline one 12 and the magnetic powder distribution pipeline two 14 to form a dotted closed loop. The flowing magnetic medium starts to solidify in the magnetic field. When the magnetic field strength is very high, the magnetic powder almost becomes a solid. At the same time, magnetic powder particles form magnetic chains between the electromagnet 6 and the driven disk two 16, connecting the active disk one 7 and the electromagnet 6 together. If the current passing through the coil of the electromagnet 6 is greater, then the number of magnetic chains is more, and the magnetic chains are also stronger. When the magnetic chains are numerous and strong, the torque transmission capacity of the magnetic powder clutch is greater. The shock absorber 11 can cancel out the vibration generated during the formation of the magnetic chains. The setting of the heat sinks 9 facilitates the heat dissipation inside the housing 1. The throttle valve one 13 and the throttle valve two 15 control the noise by controlling the speed of magnetic powder distribution.

[0025] Working principle: When using a low-noise magnetic powder clutch, when the excitation coil 5 is energized, the magnetic powder brake unit 8 starts to distribute magnetic powder through the magnetic powder distribution pipeline one 12 and the magnetic powder distribution pipeline two 14 to form a dotted closed loop. The flowing magnetic medium starts to solidify in the magnetic field. When the magnetic field strength is very high, the magnetic powder almost becomes a solid. At the same time, magnetic powder particles form magnetic chains between the electromagnet 6 and the driven disk two 16, connecting the active disk one 7 and the electromagnet 6 together. If the current passing through the coil of the electromagnet 6 is greater, then the number of magnetic chains is more, and the magnetic chains are also stronger. When the magnetic chains are numerous and strong, the torque transmission capacity of the magnetic powder clutch is greater. The shock absorber 11 can cancel out the vibration generated during the formation of the magnetic chains. The setting of the heat sinks 9 facilitates the heat dissipation inside the housing 1. The throttle valve one 13 and the throttle valve two 15 control the noise by controlling the speed of magnetic powder distribution.

[0026] Finally, it should be noted that the above content is only used to illustrate the technical solution of the present utility model, rather than limiting the protection scope of the present utility model. Any simple modification or equivalent replacement made by those of ordinary skill in the art to the technical solution of the present utility model shall not depart from the essence and scope of the technical solution of the present utility model.

Claims

1. A low-noise magnetic powder clutch, comprising a housing (1), characterized in that: A first drive shaft (2) is provided on the right side of the housing (1), a second driven shaft (3) is provided on the left side of the housing (1), and a clamping ring (4) is provided inside the connection between the first drive shaft (2) and the housing (1).

2. A low-noise magnetic powder clutch according to claim 1, characterized in that: An excitation coil (5) is provided in the middle of the first drive shaft (2) and the second driven shaft (3), and an electromagnet (6) is fixedly provided on the left side of the excitation coil (5).

3. The low-noise magnetic powder clutch according to claim 2, wherein: A first active disk (7) is provided inside the connection between the second driven shaft (3) and the housing (1), and a magnetic powder braking unit (8) is provided at the upper end inside the housing (1).

4. A low-noise magnetic powder clutch according to claim 3, characterized in that: Heat sinks (9) are fixedly provided on the left and right sides of the inner end of the housing (1), and a support block (10) is fixedly provided at the lower end of the magnetic powder braking unit (8).

5. A low-noise magnetic powder clutch according to claim 4, characterized in that: A shock absorber (11) is fixedly provided below the magnetic powder braking unit (8), and a first magnetic powder distribution pipeline (12) is fixedly provided on the right side below the shock absorber (11).

6. A low-noise magnetic powder clutch according to claim 5, characterized in that: A first throttle valve (13) is fixedly provided below the first magnetic powder distribution pipeline (12), and a second magnetic powder distribution pipeline (14) is fixedly provided on the left side below the shock absorber (11).

7. A low-noise magnetic powder clutch according to claim 6, characterized in that: A second throttle valve (15) is fixedly provided below the second magnetic powder distribution pipeline (14), the second throttle valve (15) is fixedly provided to the left of the first throttle valve (13), and a second driven disk (16) is provided outside the first active disk (7).

Images