High-stability and large-torque magnetorheological fluid clutch

Patent metadata

Field	Value
Publication number	US-11879507-B2
Application number	US-202217795227-A
Country	US
Kind code	B2
Filing date	May 11, 2022
Priority date	Feb 23, 2022
Publication date	Jan 23, 2024
Grant date	Jan 23, 2024

Abstract

The present disclosure is a high-stability and large-torque magnetorheological fluid clutch. Firstly, in order to prevent sedimentation of the magnetorheological fluid, blades are installed on the disc body of an input disc. When the clutch operates in a power interruption mode, the blades can stir the magnetorheological fluid, so that the sedimented magnetorheological fluid is uniformly mixed. Secondly, in order to improve the maximum transmission torque of the magnetorheological fluid clutch, an excitation magnetic field is increased in a mode that a permanent magnet and an electromagnet are connected in series. Meanwhile, a third electric push rod is used for pushing the input disc, and the magnetorheological fluid works in a shearing-extruding working mode, so that the yield stress of the magnetorheological fluid is improved. Therefore, the maximum transmission torque of the magnetorheological fluid clutch is improved.

First claim

What is claimed is:

1. A high-stability and large-torque magnetorheological fluid clutch, comprising power output equipment, an output disc, an output disc bearing, a left shell, a magnetorheological fluid, an input disc, power input equipment and a right shell, wherein
the output disc comprises an output disc main shaft and an output disc body, and the input disc comprises an input disc main shaft and an input disc body; the output disc main shaft is connected with the power output equipment, the output disc is mounted for rotation relative to the left shell through the output disc bearing, a first electric push rod is fixed in the left shell, a push rod of the first electric push rod is connected with a first permanent magnet, and a first electromagnet is fixed to the left shell through an electromagnet support; more than one first electric push rod, more than one first permanent magnet, more than one first electromagnet and more than one electromagnet support are installed in the left shell by taking a rotating direction of the output disc main shaft as a circumferential direction;
the input disc main shaft is connected with the power input equipment, an outer ring of an input disc bearing is installed in an input disc bearing sleeve, an inner ring of the input disc bearing is installed on the input disc main shaft, the input disc bearing sleeve and the right shell are assembled in a sliding mode, an end cover is installed at one end of the right shell, and two ends of a reset spring are fixed to the end cover and the input disc bearing sleeve respectively; more than one reset spring is installed in the input disc bearing sleeve by taking a rotating direction of the input disc main shaft as the circumferential direction; the input disc is mounted for rotation and axial movement relative to the right shell through the input disc bearing and the input disc bearing sleeve; and
a second electric push rod is fixed in the right shell, a push rod of the second electric push rod is connected with a second permanent magnet, a second electromagnet is fixed in the right shell through an electromagnet support, a third electric push rod is fixed in the right shell, a push rod of the third electric push rod is connected with a thrust bearing, and the thrust bearing is installed on the input disc main shaft; and more than one second electric push rod, more than one third electric push rod, more than one second electromagnet, more than one electromagnet support and more than one second permanent magnet are installed in the right shell by taking the rotating direction of the input disc main shaft as the circumferential direction; and the magnetorheological fluid is filled between the output disc body and the input disc body, and a sealing ring is arranged at a junction of the output disc body and the input disc body.

2. The high-stability and large-torque magnetorheological fluid clutch according to claim 1 , wherein an output shaft torque sensor is installed between the output disc main shaft and the power output equipment, and an input shaft torque sensor is installed between the input disc main shaft and the power input equipment.

3. The high-stability and large-torque magnetorheological fluid clutch according to claim 1 , wherein a plurality of blades are installed on the input disc body.

4. The high-stability and large-torque magnetorheological fluid clutch according to claim 1 , wherein when each of the more than one first permanent magnet and a corresponding one of the more than one first electromagnet work in series, the N poles and the S poles of the each of the more than one first permanent magnet and the corresponding one of the more than one first electromagnet are opposite to each other; when each of the more than one second permanent magnet and a corresponding one of the more than one second electromagnet work in series, different magnetic pole faces of the S poles and the N poles of the each of the more than one second permanent magnet and the corresponding one of the more than one second electromagnet are opposite; and different magnetic pole faces of the N poles and the S poles of the each of the more than one first electromagnet and the corresponding one of the more than one second electromagnet are opposite.

5. The high-stability and large-torque magnetorheological fluid clutch according to claim 1 , wherein a sliding rail is arranged on the input disc bearing sleeve, a sliding way is arranged on the right shell, the sliding rail of the input disc bearing sleeve is assembled in the sliding way of the right shell in a sliding mode, and the end cover is installed at one end of the sliding way of the right shell.

Assignees

• Univ Zhejiang Normal

Inventors

• Chen Jinxin
• Zhou Chongqiu
• Zheng Lanpeng
• Gao Chunfu

Classifications

• F16D37/02 Primary

  the particles being magnetisable · CPC title

• F16D37/008

  the particles being carried by a fluid, to vary viscosity when subjected to electric change, i.e. electro-rheological or smart fluids (composition of such fluids C10M171/001) · CPC title

• F16D2037/001

  Electric arrangements for clutch control · CPC title

• F16D2037/005

  characterised by a single substantially radial gap in which the fluid or medium consisting of small particles is arranged · CPC title

• F16D2500/10475

  Magnetic field, e.g. electro-rheological, magnetisable particles · CPC title