阅读说明：本技术 磁流变离合器 (Magnetorheological clutch ) 是由 吴杰 黄禹铭 李青涛 王霜 梁剑 廖敏 卢劲竹 胡红 于 2020-05-15 设计创作，主要内容包括：本发明提供一种磁流变离合器,包括动力输入盘、动力输出盘、输入圆柱壳、输出圆柱壳、励磁线圈组以及永磁体,动力输入盘和动力输出盘可转动地连接；输入圆柱壳固定设置在动力输入盘上,输出圆柱壳固定设置在动力输出盘上,输入圆柱壳与输出圆柱壳沿径向相互交错嵌套排布形成用于存储磁流变液的密封间隙；多个励磁线圈组和多个永磁体一一对应地设置在密封间隙的两侧以产生共同作用的磁场使磁流变液在液态和固态之间变换。能够使励磁线圈组的磁场减小到接近于零,实现动力输入和输出的彻底分离；解决了现有技术中的多极叠加式磁流变离合器存在磁场不能完全控制进而导致动力输入和输出无法彻底分离的问题。(The invention provides a magnetorheological clutch, which comprises a power input disc, a power output disc, an input cylindrical shell, an output cylindrical shell, an excitation coil group and a permanent magnet, wherein the power input disc and the power output disc are rotatably connected; the input cylindrical shell is fixedly arranged on the power input disc, the output cylindrical shell is fixedly arranged on the power output disc, and the input cylindrical shell and the output cylindrical shell are mutually staggered, nested and arranged along the radial direction to form a sealing gap for storing magnetorheological fluid; the plurality of excitation coil groups and the plurality of permanent magnets are arranged on two sides of the sealing gap in a one-to-one correspondence mode to generate a magnetic field which acts together to enable the magnetorheological fluid to be changed between a liquid state and a solid state. The magnetic field of the excitation coil group can be reduced to be close to zero, and the complete separation of power input and power output is realized; the problem of multipolar stack formula magnetic current becomes clutch in the prior art have the magnetic field can not control completely and then lead to power input and output can not thoroughly separate is solved.)

1. A magnetorheological clutch comprising a power input disc (10), a power output disc (20), an input cylindrical shell (30), an output cylindrical shell (40) and an excitation coil assembly (50), the power input disc (10) and the power output disc (20) being mutually rotatably connected along respective axes of rotation; the input cylindrical shell (30) and the output cylindrical shell (40) are respectively provided with at least one, the input cylindrical shell (30) is fixedly arranged on the power input disc (10), the output cylindrical shell (40) is fixedly arranged on the power output disc (20), the input cylindrical shell (30) and the output cylindrical shell (40) are arranged in a mutually staggered and nested mode along the radial direction to form a sealing gap between the input cylindrical shell (30) and the output cylindrical shell (40), and the sealing gap is used for storing magnetorheological fluid; the excitation coil group (50) is a plurality of, and a plurality of excitation coil group (50) along the circumference interval setting on power take off dish (20), characterized in that, magnetic current becomes clutch still includes:

the permanent magnets (60) are multiple, and the permanent magnets (60) are arranged on the power output disc (20) at intervals along the circumferential direction;

the magnet exciting coil groups (50) and the permanent magnets (60) are arranged on two sides of the sealing gap in a one-to-one correspondence mode along the radial direction of the power output disc (20), and the magnet exciting coil groups (50) and the permanent magnets (60) generate a combined magnetic field at the sealing gap so that magnetorheological fluid in the sealing gap can be changed between a liquid state and a solid state and the power input disc (10) and the power output disc (20) can be changed between a separation state and a combination state.

2. The magnetorheological clutch of claim 1, wherein the input cylindrical housing (30) and the output cylindrical housing (40) are each plural in number;

wherein a plurality of the input cylindrical shells (30) are nested and arranged at intervals along the radial direction of the power input disc (10); the output cylindrical shells (40) are mutually nested and arranged at intervals along the radial direction of the power output disc (20).

3. The magnetorheological clutch of claim 1, wherein the field coil sets (50) and the permanent magnets (60) are each present in an even number.

4. The magnetorheological clutch of claim 1, wherein the power input disc (10) comprises an input shaft (11) and an input disc body (12), and the input shaft (11) is fixedly arranged at the central part of the input disc body (12) and extends along the axis of the input disc body (12); the power output disc (20) comprises an output shaft (21), a first output disc body part (22), a second output disc body part (23) and a connecting ring (24), and the first output disc body part (22) and the second output disc body part (23) are connected with each other through the connecting ring (24) to form a cylindrical cavity;

wherein the input disc body (12), the input cylindrical shell (30), the output cylindrical shell (40), the field coil assembly (50), and the permanent magnets (60) are all located within the cylindrical cavity;

the central part of the input disc part (12), the central part of the first output disc part (22) and the central part of the second output disc part (23) are provided with shaft holes with mutually collinear shaft axes; the connecting part of the input shaft (11) and the input disc body part (12) is rotatably connected with the shaft hole of the first output disc body part (22) through a first bearing (70), the first end of the output shaft (21) is rotatably connected with the shaft hole of the input disc body part (12) through a second bearing (80), and the second end of the output shaft (21) is fixedly connected with the shaft hole of the second output disc body part (23);

the input cylindrical shell (30) is fixedly arranged on the input disc body part (12), and the output cylindrical shell (40) is fixedly arranged on the second output disc body part (23); the excitation coil groups (50) are fixedly connected with the second output disk body (23) and the connecting ring (24), and the permanent magnets (60) are fixedly connected with the second output disk body (23) and the output shaft (21).

5. The magnetorheological clutch of claim 4, wherein the field coil assembly (50) comprises:

a base part (51) fixedly connected with the second output disk body part (23);

a core part (52) fixedly arranged on the base part (51) and fixedly connected with the connecting ring (24);

a coil (53) wound around the core portion (52).

6. The magnetorheological clutch according to claim 5, wherein the coils (53) of two adjacent excitation coil groups (50) have opposite winding directions.

7. The magnetorheological clutch of claim 6, wherein the base portion (51) and the core portion (52) are integrally formed and are each made of a magnetically conductive material, the magnetorheological clutch further comprising:

a plurality of first non-magnetic conductive metal blocks (90), each of the first non-magnetic conductive metal blocks (90) being disposed between the base parts (51) of two adjacent excitation coil groups (50) to isolate magnetic fields of the two adjacent excitation coil groups (50) from each other.

8. The magnetorheological clutch of claim 4, wherein the power take-off disk (20) further comprises:

a support ring (25) fixedly sleeved on the output shaft (21);

wherein the permanent magnets (60) are arranged on the support ring (25) at intervals along the circumferential direction so as to be fixedly connected with the output shaft (21) through the support ring (25).

9. The magnetorheological clutch of claim 8, wherein adjacent ones of the permanent magnets (60) are of opposite polarity.

10. The magnetorheological clutch of claim 9, further comprising:

a plurality of second non-magnetic metal blocks (100), wherein each second non-magnetic metal block (100) is arranged between two adjacent permanent magnets (60) to isolate the magnetic fields of the two adjacent permanent magnets (60) from each other.

Technical Field

The invention relates to the field of clutches, in particular to a magnetorheological clutch.

Background

The magnetic rheological liquid is a suspension liquid formed by uniformly mixing ferromagnetic particles with high magnetic conductivity, carrier liquid and additives according to a certain volume ratio. Under the condition of zero field, the magnetorheological fluid is liquid with good fluidity and small apparent viscosity; under the action of strong magnetic field, the apparent viscosity can be increased by more than two orders of magnitude in a short time (millisecond level), and the solid-like characteristic is presented; moreover, the change is continuous and reversible, namely, the magnetic field is removed and the original state is recovered.

The magnetorheological fluid has good controllability and reversibility, and is widely applied to the aspects of power transmission, vibration reduction, soft start, stepless speed change and the like. The magnetorheological clutch is characterized in that magnetorheological fluid is added between a driving part and a driven part of a transmission device, and the combination and separation state of the clutch is realized by controlling the intensity of external magnetic field intensity, so that the transmission and separation of power are realized, and even the stepless change control of torque transmission can be realized. The clutch has the advantages of simple structure, low noise, short response time and simple control system, and overcomes the defects of large noise, unstable torque, complex control system and the like of the traditional clutch.

The problem that the shear yield stress of the magnetorheological fluid is not large always troubles the development of magnetorheological fluid materials and technologies, and in order to realize high-power transmission, the existing magnetorheological clutch adopts a plurality of groups of annular coils which are arranged along the radial direction to realize a superposed magnetic field, so that the shear yield stress of the magnetorheological fluid is effectively improved, the torque of the power transmission is further enhanced, and the high-power transmission is realized.

For example, in a chinese patent "multi-pole superposed magnetorheological clutch" (application No. 201910364583.9) published in 2019, 8, and 23, a plurality of inner coils and a plurality of outer coils are respectively arranged along the circumferential direction at the inner and outer sides of a working gap of a cylindrical magnetorheological fluid, and the magnetic field generated by the inner coils and the magnetic field generated by the outer coils are superposed to further enhance the magnetic field intensity acting on the magnetorheological fluid, thereby realizing the enhancement of transmission torque and the transmission of high-power.

However, the magnetic field superposition for achieving large torque and large power transmission by increasing the number and positional arrangement of the coils has the following problems:

1) the energy consumption is higher: the magnetic field superposition is realized by increasing the number of coils, so that the energy consumption of an external power supply is greatly increased, and the energy conservation and consumption reduction are not facilitated;

2) the magnetic field cannot be completely controlled: after the coils are powered off, the inner coils and the outer coils have serious residual magnetism, so that a magnetic field acting on the magnetorheological fluid cannot completely disappear, and further, the power input and the power output cannot be completely separated, and the working performance of the clutch is influenced.

Disclosure of Invention

The invention mainly aims to provide a magnetorheological clutch, which at least solves the problem that the magnetic field of a multipole superposed magnetorheological clutch in the prior art cannot be completely controlled, so that the power input and the power output cannot be completely separated.

In order to achieve the above object, the present invention provides a magnetorheological clutch, including a power input disc, a power output disc, an input cylindrical shell, an output cylindrical shell and an excitation coil set, the power input disc and the power output disc being connected to each other rotatably along respective rotation axes; the input cylindrical shell and the output cylindrical shell are both provided with at least one, the input cylindrical shell is fixedly arranged on the power input disc, the output cylindrical shell is fixedly arranged on the power output disc, the input cylindrical shell and the output cylindrical shell are mutually staggered and nested in the radial direction to form a sealing gap between the input cylindrical shell and the output cylindrical shell, and the sealing gap is used for storing magnetorheological fluid; excitation coil group is a plurality of, and a plurality of excitation coil groups set up on power take off dish along circumference interval, and its characterized in that, magnetorheological clutch still includes: the permanent magnets are arranged on the power output disc at intervals along the circumferential direction; the magnetic-rheological fluid in the sealing gap is converted between a liquid state and a solid state so as to convert the power input disc and the power output disc between a separation state and a combination state.

Furthermore, a plurality of input cylindrical shells and a plurality of output cylindrical shells are provided; the input cylindrical shells are mutually nested and arranged at intervals along the radial direction of the power input disc; a plurality of output cylindrical shells are nested and arranged at intervals along the radial direction of the power output disc.

Further, the number of the excitation coil groups and the number of the permanent magnets are both even.

Furthermore, the power input disc comprises an input shaft and an input disc body, and the input shaft is fixedly arranged at the central part of the input disc body and extends along the axial lead of the input disc body; the power output disc comprises an output shaft, a first output disc body, a second output disc body and a connecting ring, and the first output disc body and the second output disc body are mutually connected through the connecting ring to enclose a cylindrical cavity; the input disc body part, the input cylindrical shell, the output cylindrical shell, the excitation coil group and the permanent magnet are all positioned in the cylindrical cavity; the center part of the input disc body, the center part of the first output disc body and the center part of the second output disc body are all provided with shaft holes with mutually collinear shaft axes; the connecting part of the input shaft and the input disk body is rotatably connected with the shaft hole of the first output disk body through a first bearing, the first end of the output shaft is rotatably connected with the shaft hole of the input disk body through a second bearing, and the second end of the output shaft is fixedly connected with the shaft hole of the second output disk body; the input cylindrical shell is fixedly arranged on the input disc part, and the output cylindrical shell is fixedly arranged on the second output disc part; the plurality of excitation coil groups are fixedly connected with the second output disk body part and the connecting ring, and the plurality of permanent magnets are fixedly connected with the second output disk body part and the output shaft.

Further, the exciting coil group includes: the base part is fixedly connected with the second output disc part; the core part is fixedly arranged on the base part and is fixedly connected with the connecting ring; and a coil wound on the core portion.

Further, the winding directions of the coils of the two adjacent excitation coil groups are opposite.

Further, base portion and core portion integrated into one piece just all adopt magnetic materials to make, magnetorheological clutch still includes: the first non-magnetic conductive metal block is provided in a plurality, and each first non-magnetic conductive metal block is arranged between the base parts of two adjacent excitation coil groups to isolate the magnetic fields of the two adjacent excitation coil groups from each other.

Further, the power output disc further includes: the support ring is fixedly sleeved on the output shaft; the permanent magnets are arranged on the support ring at intervals along the circumferential direction so as to be fixedly connected with the output shaft through the support ring.

Further, the polarities of the adjacent two permanent magnets are opposite.

Further, the magnetorheological clutch further comprises: and a plurality of second non-magnetic metal blocks, each of which is arranged between two adjacent permanent magnets to isolate the magnetic fields of the two adjacent permanent magnets from each other.

The magneto-rheological clutch applying the technical scheme of the invention comprises a power input disc, a power output disc, an input cylindrical shell, an output cylindrical shell, an excitation coil group and a permanent magnet, wherein the power input disc and the power output disc are mutually rotatably connected along respective rotation axes; the input cylindrical shell and the output cylindrical shell are both provided with at least one, the input cylindrical shell is fixedly arranged on the power input disc, the output cylindrical shell is fixedly arranged on the power output disc, and the input cylindrical shell and the output cylindrical shell are mutually staggered and nested in the radial direction to form a sealing gap for storing magnetorheological fluid between the input cylindrical shell and the output cylindrical shell; the magnetic exciting coil groups and the permanent magnets are arranged on the power output disc at intervals along the circumferential direction, the magnetic exciting coil groups and the permanent magnets are arranged on two sides of the sealing gap in a one-to-one correspondence mode along the radial direction of the power output disc, and the magnetic exciting coil groups and the permanent magnets generate a magnetic field acting together at the sealing gap so that magnetorheological fluid in the sealing gap is changed between a liquid state and a solid state to further enable the power input disc and the power output disc to be changed between a separation state and a combination state. The magnetic field opposite to the permanent magnet is generated by the excitation coil group, so that the magnetic field of the excitation coil group can be reduced to be close to zero, and the complete separation of power input and power output is realized; the magnetic field group generates a magnetic field which is the same as that of the permanent magnet, so that the magnetic field superposition is realized, the large-torque and high-power transmission is realized, and the energy consumption is effectively reduced. The problem of multipolar stack formula magnetic current becomes clutch in the prior art have the magnetic field can not control completely and then lead to power input and output can not thoroughly separate is solved.

Drawings

FIG. 1 is a schematic diagram of an alternative embodiment of a magnetorheological clutch in longitudinal cross section in accordance with the invention; and

fig. 2 is a schematic sectional view taken along line a-a of fig. 1.

Wherein the figures include the following reference numerals:

10. a power input disc; 11. an input shaft; 12. an input tray body portion; 20. a power take-off pan; 21. an output shaft; 22. a first output tray portion; 23. a second output tray portion; 24. a connecting ring; 25. a support ring; 26. an oil slinger; 30. inputting the cylindrical shell; 40. outputting the cylindrical shell; 50. a field coil group; 51. a base part; 52. a core portion; 53. a coil; 60. a permanent magnet; 70. a first bearing; 80. a second bearing; 90. a first non-magnetic conductive metal block; 100. a second non-magnetic conductive metal block.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention are described clearly and completely below, and it is obvious that the described embodiments are some, not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The magnetorheological clutch according to the embodiment of the invention, as shown in fig. 1 and 2, comprises a power input disc 10, a power output disc 20, an input cylindrical shell 30, an output cylindrical shell 40, an excitation coil group 50 and permanent magnets 60, wherein the power input disc 10 and the power output disc 20 are mutually rotatably connected along respective rotation axes; the input cylindrical shell 30 and the output cylindrical shell 40 are both provided with at least one, the input cylindrical shell 30 is fixedly arranged on the power input disc 10, the output cylindrical shell 40 is fixedly arranged on the power output disc 20, and the input cylindrical shell 30 and the output cylindrical shell 40 are mutually staggered and nested in the radial direction to form a sealing gap for storing magnetorheological fluid between the input cylindrical shell 30 and the output cylindrical shell 40; the plurality of excitation coil groups 50 and the plurality of permanent magnets 60 are arranged on the power output disc 20 at intervals along the circumferential direction, the plurality of excitation coil groups 50 and the plurality of permanent magnets 60 are arranged on two sides of the seal gap in a one-to-one correspondence manner along the radial direction of the power output disc 20, and the plurality of excitation coil groups 50 and the plurality of permanent magnets 60 generate a magnetic field acting together at the seal gap so that magnetorheological fluid in the seal gap is changed between a liquid state and a solid state, and further the power input disc 10 and the power output disc 20 are changed between a separation state and a combination state. The magnetic field opposite to the permanent magnet 60 is generated by the excitation coil group 50, so that the magnetic field of the excitation coil group 50 can be reduced to be close to zero, and the complete separation of power input and power output is realized; the same magnetic field as the permanent magnet 60 is generated by the exciting coil group 50, and magnetic field superposition is realized, so that high torque and high power transmission is realized, and energy consumption is effectively reduced. The problem of multipolar stack formula magnetic current becomes clutch in the prior art have the magnetic field can not control completely and then lead to power input and output can not thoroughly separate is solved.