CN212360555U

CN212360555U - Multi-disc type magnetorheological clutch based on electromagnetic force extrusion

Info

Publication number: CN212360555U
Application number: CN202022056685.5U
Authority: CN
Inventors: 熊洋; 黄金; 陈松
Original assignee: Chongqing University of Technology
Current assignee: Chongqing University of Technology
Priority date: 2020-09-18
Filing date: 2020-09-18
Publication date: 2021-01-15
Anticipated expiration: 2030-09-18

Abstract

The utility model discloses a multi-disc magneto-rheological clutch based on electromagnetic force extrusion, which comprises a driving shaft, a driven shell and a driven shaft, wherein the driven shell comprises a left shell, a driven cylinder, an armature and a blank cap, the middle part of the inner side of the driven cylinder is provided with a coil groove, and an excitation coil is wound in the coil groove; the part of the driving shaft, which is positioned in the driven shell, forms a transmission section, a driving disc and a driven disc are sleeved on the transmission section, and magnetorheological fluid is filled in gaps among the left shell, the driving disc, the driven disc and the armature; the left end of the driven shaft is fixedly connected with the blank cap, the driven shaft is further sleeved with a support ring, a plurality of guide support rods are arranged on the left side of the support ring, and the guide support rods are sleeved with shape memory alloy springs. The utility model discloses can improve the maximum torque of clutch transmission to effectively solve magnetorheological suspensions and along with ambient temperature's the problem that the rising performance descends, thereby guarantee clutch transmission stability, and simple structure.

Description

Multi-disc type magnetorheological clutch based on electromagnetic force extrusion

Technical Field

The utility model relates to a clutch technical field especially relates to a polydisc formula magnetic current becomes clutch based on electromagnetic force extrusion.

Background

The shape memory alloy is a novel intelligent material, after the shape memory alloy with a certain initial shape is deformed to a certain degree under a certain condition, the shape memory alloy can be subjected to inverse deformation by properly changing the temperature, so that the material is restored to the initial shape, and in the shape restoring process, the shape memory alloy can generate great restoring force if being restrained, and can do work outwards by utilizing the restoring force; the magnetorheological fluid is a two-phase suspension which can be changed into a solid or gel-like state from a fluid under the action of an external magnetic field, the change of the magnetorheological fluid is reversible, under the action of the external magnetic field, magnetically polarizable particles form dipole moments, so that the particles form a chain or column-like structure in a direction parallel to the magnetic field, the phase state of the magnetorheological fluid is changed, the apparent viscosity of the magnetorheological fluid is increased, high yield stress is shown, and the yield stress can be utilized to transmit torque.

However, in the prior art, as disclosed in CN109611464B, when the electromagnetic coil is powered on, the disk cam presses the piston head to move right, pressing the magnetorheological liquid in the multi-stage interlayer cavity from a liquid-like state to a solid-like state, so as to solve the problems of shaking and impact of the automobile clutch when transmitting force and torque; for example, CN109538649B discloses an axial movable extrusion type multilayer cylindrical clutch based on magnetorheological fluid, wherein when a motor rotates, an inner shaft of an output shaft is driven to move axially, so that the length and adjacent area of an annular cavity formed by an input shaft and the output shaft are changed, and when a piston head moves leftwards under the action of magnetic field force, the magnetorheological fluid in the annular cavity is extruded, so as to improve the force and moment transmission capability of the clutch; for example, CN206802225U discloses a magnetorheological fluid and friction combined transmission device extruded by shape memory alloy, when the ambient temperature rises, the device can automatically turn on the power supply through a shape memory alloy switch, after the temperature of the device rises, the shape memory alloy spring generates output force to push the driven pressure plate and the driving right shell to generate pressure, the driven pressure plate can also extrude the magnetorheological fluid, and the performance of the magnetorheological fluid can be increased; for example, CN103277471B discloses an alternating transmission device of magnetorheological fluid and memory alloy, which utilizes the characteristics of memory alloy in sensing temperature to make up the deficiency that the magnetorheological fluid transmission device has reduced performance or even fails at high temperature, so that the magnetorheological fluid transmission device can meet the working requirements at different temperatures, and the alternating transmission of magnetorheological fluid and memory alloy is realized by sensing temperature; for example, CN104895956A discloses an electrothermal magnetic shape memory alloy and magnetorheological fluid composite centrifugal clutch, which utilizes disc magnetorheological fluid and centrifugal slider friction to transmit torque together, and changes the temperature of the magnetic field of the excitation coil acting on the magnetorheological fluid and the temperature of the shape memory alloy spring by changing the current, thereby implementing intelligent control of the torque transmitted by the clutch.

At present, researchers have used a great deal of research on the independent application of shape memory alloy and magnetorheological fluid in the field of transmission, but the research on the combined application of the shape memory alloy and the magnetorheological fluid in a transmission device is still few, and particularly the research on the magnetorheological transmission of the co-extrusion of electromagnetism and a shape memory alloy spring is few; the existing single magnetorheological clutch has the disadvantages of small transmitted torque and low transmission efficiency, and the transmission performance of the magnetorheological fluid is reduced along with the rise of temperature, so that the torque transmission stability is poor; although the transmission of the shape memory alloy and the magnetorheological fluid can improve the transmission torque, how to better apply the shape memory alloy and the magnetorheological fluid to the clutch in the transmission, reasonably utilize the extrusion strengthening effect of the magnetorheological fluid, solve the problem that the performance of the magnetorheological fluid is reduced along with the rise of the environmental temperature, and improve the transmission stability and the effect of the clutch becomes the technical problems which are urgently needed to be solved by technical personnel in the field.

SUMMERY OF THE UTILITY MODEL

Aiming at the defects in the prior art, the utility model aims to provide a multi-disc type magneto-rheological clutch based on electromagnetic force extrusion, which can effectively apply shape memory alloy and magneto-rheological fluid to the clutch in a combined manner, thereby effectively solving the problem that the performance of the magneto-rheological fluid is reduced along with the rise of the environmental temperature; and reasonably applying the extrusion strengthening effect of the magnetorheological fluid, improving the maximum torque transmitted by the clutch and ensuring the transmission stability and the transmission performance of the clutch.

In order to solve the technical problem, the utility model discloses a technical scheme is like this: the utility model provides a multi-disk magnetorheological clutch based on electromagnetic force extrusion, includes driving shaft, driven housing and driven shaft, its characterized in that: the driven shell comprises a left shell, a driven cylinder, an armature and a blank cap, and the left shell is fixedly connected with the left end of the driven cylinder; the armature is positioned at the right end of the driven cylinder, the middle part of the armature protrudes rightwards to form a sleeve, and the armature is sleeved on the blank cap through the sleeve and is connected with the blank cap in a sliding fit manner through the fit of a key and a key groove; a plurality of guide shear rods are arranged on the left side of the armature and around the periphery of the armature corresponding to the position of the driven cylinder, guide holes are formed in the right end face of the driven cylinder and corresponding to the guide shear rods, one end of each guide shear rod is fixedly connected with the armature, and the other end of each guide shear rod extends into the guide holes and is connected with the guide holes in a sliding fit manner;

a coil groove is formed in the middle of the inner side of the driven cylinder, and an excitation coil is wound in the coil groove; the inner side of the driven cylinder is provided with a magnetism isolating ring, the outer side of the magnetism isolating ring is tightly attached to the inner side of the driven cylinder, the left end of the magnetism isolating ring is tightly attached to the left shell, and the right end of the magnetism isolating ring extends out of the right end of the driven cylinder; a circular groove is arranged on the left side of the armature corresponding to the magnetism isolating ring, and the depth of the circular groove is more than or equal to the length of the magnetism isolating ring extending out of the right end part of the driven cylinder; the right end of the magnetism isolating ring extends into the circular groove and is connected with the groove wall of the circular groove in a sliding fit manner;

the right end of the driving shaft penetrates through the left shell and then extends into the blank cap, and is connected with the left shell and the blank cap through a bearing; the part of the driving shaft, which is positioned in the driven shell, forms a transmission section, and a plurality of key grooves are arranged on the transmission section around the transmission section, so that the transmission section forms a spline shaft; the transmission section is sleeved with a driving disc and a driven disc, the driving disc and the driven disc are alternately distributed along the axial direction of the driving shaft, a gap is formed between the adjacent driving disc and the adjacent driven disc, and a gap is also formed between the driving disc or the driven disc and the left shell and the right shell; the inner hole of the driving disc is a spline hole corresponding to the transmission section, and the driving disc is connected with the transmission section through the spline hole and can synchronously rotate along with the driving shaft; the inner hole of the driven disc is a circular hole and can freely rotate around the driving shaft; inner rubber rings are respectively arranged between the driving disc and the left shell, between two adjacent driving discs and between the driving disc and the armature, the inner rubber rings are sleeved on the transmission section, and gaps are formed between the outer sides of the inner rubber rings and the inner holes of the driven discs; outer rubber rings are respectively arranged between the driven discs and the left shell, between two adjacent driven discs and between the driven discs and the armature, the outer sides of the outer rubber rings are tightly attached to the magnetism isolating ring, and gaps are formed between the inner sides of the outer rubber rings and the outer edges of the driving discs; the driven disc and the outer rubber ring are connected with the left shell through a plurality of connecting bolts which sequentially penetrate through the outer rubber ring and the driven disc from right to left; magnetorheological fluid is filled in gaps among the left shell, the driving disc, the driven disc and the armature;

the left end of the driven shaft is fixedly connected with the blank cap, and the driven shaft is also sleeved with a support ring which is fixedly connected with the blank cap; a plurality of guide support rods are arranged on the left side of the support ring, and the length direction of each guide support rod is consistent with the axial direction of the driving shaft; the guide support rod is sleeved with a shape memory alloy spring, one end of the shape memory alloy spring is fixedly connected with the armature, and the other end of the shape memory alloy spring is in contact with the support ring.

Furthermore, a plurality of reset springs are arranged on the left side of the armature and around the periphery of the left side of the driven cylinder corresponding to the driven cylinder, a spring groove is formed in the right end face of the driven cylinder corresponding to the reset springs, the reset springs are located in the spring groove, one end of each reset spring is fixedly connected with the groove bottom of the spring groove, and the other end of each reset spring extends to the spring groove and is fixedly connected with the armature.

Furthermore, an electric brush slip ring is arranged on the left side of the left shell, the electric brush slip ring and the driving shaft are arranged coaxially and fixedly connected with the left shell, and two ends of the excitation coil are connected with the electric brush slip ring.

The dust cover is of a cylindrical structure with one open end and the other closed end, the closed end of the dust cover is provided with a mounting hole and sleeved on the driven shaft through the mounting hole, and the open end of the dust cover extends towards the direction of the driven cylinder and is sleeved on the driven cylinder.

Furthermore, through holes for the screw rods of the connecting bolts to penetrate are formed in the outer rubber ring and the driven plate corresponding to the connecting bolts, the through holes in the outer rubber ring between the driven plate and the armature are countersunk holes, and the bolt heads of the connecting bolts are located in the countersunk holes.

Furthermore, the inner sides of the two bearings are respectively provided with a sealing ring, the sealing rings are sleeved on the driving shaft and seal a gap between the driving shaft and the left shell and a gap between the driving shaft and the blank cap.

Furthermore, a sealing ring is arranged between the armature and the blank cap, and the sealing ring is sleeved on the blank cap and is fixedly connected with the blank cap.

Furthermore, a transparent cover is further arranged on the left side of the left shell, the transparent cover is sleeved on the main shaft and is fixedly connected with the left shell, and a felt ring is arranged between the transparent cover and the driving shaft.

Furthermore, a liquid injection hole is also formed in the left shell, and a liquid injection screw plug is arranged in the liquid injection hole in a matched mode.

Compared with the prior art, the utility model has the advantages of as follows:

1. the magnetorheological fluid working gap formed by alternately arranging the driving discs and the driven discs at intervals enables the clutch to be compact in structure and larger in contact area, so that the shear stress of the magnetorheological fluid is increased, and the maximum torque transmitted by the clutch can be effectively improved.

2. When the magnet exciting coil is electrified, the armature is attracted by the electromagnetic force generated by the magnet exciting coil, and the magnetorheological fluid is extruded by the armature along the axial direction of the driven shaft, so that the pressure between each driving disc and each driven disc and the magnetorheological fluid is increased, the extrusion strengthening effect of the magnetorheological fluid is enhanced along with the increase of a magnetic field, and the transmission power of the clutch is further improved.

3. After the temperature rises, the shape memory alloy spring extends in an extruding way and generates thrust (extrudes) on the armature, so that the armature generates larger extrusion force between each driving disc and each driven disc and the magnetorheological fluid, and the extrusion strengthening effect is further enhanced, thereby effectively ensuring the transmission performance of the clutch under different temperature conditions, making up the reduction of the performance of the magnetorheological fluid along with the rise of the temperature, and enabling the transmission torque of the clutch to be larger.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

In the figure: 1-driving shaft, 2-driven shaft, 3-left shell, 4-driven cylinder, 5-armature, 6-blank cap, 7-guiding shear rod, 8-excitation coil, 9-magnetic isolation ring, 10-driving disk, 11-driven disk, 12-inner rubber ring, 13-outer rubber ring, 14-magnetorheological fluid, 15-support ring, 16-guiding support rod, 17-shape memory alloy spring, 18-reset spring, 19-electric brush slip ring, 20-dust cover, 21-sealing ring, 22-sealing ring, 23-transparent cap, 24-liquid injection screw plug.

Detailed Description

The present invention will be further explained with reference to the drawings and examples.

Example (b): referring to fig. 1, a multi-disc type magnetorheological clutch based on electromagnetic force extrusion comprises a driving shaft 1, a driven housing and a driven shaft 2; wherein the driven shell comprises a left shell 3, a driven cylinder 4, an armature 5 and a blank cap 6. The left shell 3 is fixedly connected with the left end of the driven cylinder 4; the armature 5 is positioned at the right end of the driven cylinder 4, the middle part of the armature protrudes rightwards to form a sleeve, and the armature 5 is sleeved on the blank cap 6 through the sleeve and is connected with the blank cap 6 in a sliding fit manner through the fit of a key and a key groove; when the device is used, the left side of the blank cap 6 is provided with a guide cylinder, the armature 5 is sleeved on the guide cylinder and is in sliding connection with the guide cylinder through the matching of a key and a key groove, and the guide cylinder (the blank cap 6) can be driven to synchronously rotate. A sealing ring 22 is also arranged between the armature 5 and the blank cap 6, and the sealing ring 22 is sleeved on the blank cap 6 and is fixedly connected with the blank cap 6, so that the sealing effect in the driven shell is better; when assembled, the seal 22 is located at the inner end of the guide cylinder. And a plurality of guide shear rods 7 are arranged on the left side of the armature 5 around the periphery of the position corresponding to the driven cylinder 4, guide holes are formed in the right end face of the driven cylinder 4 corresponding to the guide shear rods 7, one end of each guide shear rod 7 is fixedly connected with the armature 5, and the other end of each guide shear rod 7 extends into the guide holes and is connected with the guide holes in a sliding fit manner. In this way, the driven cylinder 4 can drive the armature 5 to rotate synchronously by guiding the guide shear rod 7.

And a coil groove is formed in the middle of the inner side of the driven cylinder 4, and an excitation coil 8 is wound in the coil groove. The inner side of the driven cylinder 4 is provided with a magnetism isolating ring 9, the outer side of the magnetism isolating ring 9 is tightly attached to the inner side of the driven cylinder 4, the left end of the magnetism isolating ring is tightly attached to the left shell 3, and the right end of the magnetism isolating ring extends out of the right end of the driven cylinder 4. A circular groove is arranged on the left side of the armature iron 5 corresponding to the magnetism isolating ring 9, and the depth of the circular groove is more than or equal to the length of the magnetism isolating ring 9 extending out of the right end part of the driven cylinder 4; the right end of the magnetism isolating ring 9 extends into the circular groove and is connected with the groove wall of the circular groove in a sliding fit manner; wherein, the armature iron 5 is always attached to the magnetism isolating ring 9 in the sliding process along the guide cylinder; therefore, a closed cavity is formed among the left shell 3, the magnetism isolating ring 9 and the armature 5 all the time. The left side of the left shell 3 is also provided with an electric brush slip ring 19, the electric brush slip ring 19 is arranged coaxially with the driving shaft 1 and is fixedly connected with the left shell 3, and two ends of the excitation coil 8 are connected with the electric brush slip ring 19; thereby facilitating the power supply to the exciting coil 8.

The right end of the driving shaft 1 penetrates through the left shell 3 and then extends into the blank cap 6 (the guide cylinder) and is connected with the left shell 3 and the blank cap 6 (the guide cylinder) through a bearing. The left side of the left shell 3 is also provided with a transparent cover 23, the transparent cover 23 is sleeved on the main shaft and is fixedly connected with the left shell 3, and a felt ring is arranged between the transparent cover 23 and the driving shaft 1, so that the left side of the left shell 3 and a gap between the left side of the left shell and the driving shaft 1 are sealed. The inner sides of the two bearings are respectively provided with a sealing ring 21, the sealing ring 21 is sleeved on the driving shaft 1 and seals a gap between the driving shaft 1 and the left shell 3 and a gap between the driving shaft 1 and the blank cap 6 (the guide cylinder), so that the sealing effect of the whole clutch is further improved.

The part of the driving shaft 1 in the driven shell forms a transmission section, and a plurality of key grooves are arranged on the transmission section around the transmission section, so that the transmission section forms a spline shaft. The driving discs 10 and the driven discs 11 are sleeved on the transmission section, the driving discs 10 and the driven discs 11 are alternately distributed along the axial direction of the driving shaft 1, gaps are formed between the adjacent driving discs 10 and the adjacent driven discs 11, and gaps are also formed between the driving discs 10 or the driven discs 11 and the left shell 3 and the right shell. The inner hole of the driving disc 10 is a spline hole corresponding to the transmission section, the driving disc 10 is connected with the transmission section through the spline hole and can synchronously rotate along with the driving shaft 1, and meanwhile, the driving disc 10 can move along the axial direction of the driving shaft 1. The inner hole of the driven disc 11 is a round hole and can rotate freely around the driving shaft 1. Inner rubber rings 12 are respectively arranged between the driving disc 10 and the left shell 3, between two adjacent driving discs 10 and between the driving disc 10 and the armature 5, the inner rubber rings 12 are sleeved on the transmission section, and gaps are formed between the outer sides of the inner rubber rings 12 and the inner holes of the driven discs 11; outer rubber rings 13 are respectively arranged between the driven discs 11 and the left shell 3, between two adjacent driven discs 11 and between the driven discs 11 and the armature 5, the outer sides of the outer rubber rings 13 are tightly attached to the magnetism isolating ring 9, and gaps are formed between the inner sides of the outer rubber rings 13 and the outer edge of the driving disc 10. By providing the inner rubber ring 12 and the outer rubber ring, not only the gap between the driving disks 10 or the driven disks 11 is sealed, but also the pressing force is transmitted by the coordinated deformation. The driven disc 11 and the outer rubber ring 13 are connected with the left shell 3 through a plurality of connecting bolts which sequentially penetrate through the outer rubber ring 13 and the driven disc 11 from right to left; thus, the driven disc 11 can drive the left housing 3 to synchronously rotate through the connecting bolt, and further drive the driven housing to synchronously rotate. Magnetorheological fluid 14 is filled in gaps among the left shell 3, the driving disc 10, the driven disc 11 and the armature 5. The left shell 3 is also provided with a liquid injection hole, and a liquid injection screw plug 24 is arranged in the liquid injection hole in a matching way; to facilitate the injection or replacement of the magnetorheological fluid 14.

In specific implementation, through holes for the screws of the connecting bolts to pass through are formed in the outer rubber ring 13 and the driven disc 11 at positions corresponding to the connecting bolts; the through hole on the outer rubber ring 13 between the driven plate 11 and the armature 5 is a countersunk hole, and the bolt head of the connecting bolt is positioned in the countersunk hole; in this way, interference between the bolt head of the connecting bolt and the armature 5 can be effectively avoided, so that the armature 5 can be ensured to move freely, and the magnetorheological fluid 14 can be squeezed in the moving process.

The left end of the driven shaft 2 is fixedly connected with the blank cap 6, and during implementation, the driven shaft 2 and the blank cap 6 are integrally formed, so that the strength and the stability of the driven shaft 2 and the blank cap 6 can be improved. In the assembling process, the driving shaft 1, the driven shaft 2 and the driven cylinder 4 are arranged coaxially, so that the working stability of the clutch can be ensured. A support ring 15 is further sleeved on the driven shaft 2, and the support ring 15 is fixedly connected with the blank cap 6. A plurality of guide support rods 16 are arranged on the left side of the support ring 15, and the length direction of the guide support rods 16 is consistent with the axial direction of the driving shaft 1; a shape memory alloy spring 17 is sleeved on the guide support rod 16, one end of the shape memory alloy spring 17 is fixedly connected with the armature 5, and the other end of the shape memory alloy spring 17 is contacted with the support ring 15. A plurality of return springs 18 are arranged on the left side of the armature 5 around the periphery of the driven cylinder 4 corresponding to the driven cylinder, a spring groove is arranged on the right end face of the driven cylinder 4 corresponding to the return springs 18, the return springs 18 are positioned in the spring groove, one end of each return spring is fixedly connected with the groove bottom of the spring groove, and the other end of each return spring extends to the spring groove and is fixedly connected with the armature 5. In practical implementation, the return springs 18 and the guide shear rods 7 are alternately distributed around the circumference of the driven cylinder 4. In the initial state, under the action of the return spring 18, a gap is formed between the armature 5 and the right end of the driven cylinder 4; when the electromagnetic force generated by the exciting coil 8 and the pressing of the shape memory alloy spring 17 against the armature 5 are reduced or eliminated, the return spring 18 can quickly push the armature 5 back to the initial position, thereby improving the response speed of the clutch.

The dust cover 20 is a cylindrical structure with one open end and the other closed end, the closed end of the dust cover 20 is provided with an installation hole and sleeved on the driven shaft 2 through the installation hole, and the open end of the dust cover extends towards the driven cylinder 4 and is sleeved on the driven cylinder 4; through setting up dust cover 20, can prevent effectively that the dust from entering into in the clutch to improve the job stabilization nature of clutch.

In the working process:

1. in an initial state, the magnetorheological fluid 14 is in a working gap formed by the driving disc 10, the driven disc 11 and the driven shell, the magnet exciting coil 8 is not electrified, the driving shaft 1 rotates, and the driven shell and the driven shaft 2 cannot be driven to rotate by means of torque transmitted by the viscous force of the magnetorheological fluid 14 in a zero magnetic field.

2. After the excitation coil 8 is electrified, magnetic flux generated by the excitation coil 8 acts on the magnetorheological fluid 14, magnetic particles in the magnetorheological fluid 14 are arranged into a chain-shaped structure along the direction of the magnetic flux (namely, the magnetorheological fluid 14 is solidified), the driving disc 10 drives the driven disc 11 to rotate by means of the shear stress of the chain-shaped structure, the driven disc 11 drives the driven shell to rotate, so that the transmitted torque drives the driven shaft 2 to rotate, and the torque is increased along with the increase of the current. Meanwhile, when the exciting coil 8 is electrified, the armature 5 is attracted by the electromagnetic force generated by the exciting coil 8, the magnetorheological fluid 14 is extruded by the armature 5 along the axial direction of the driving shaft 1, the driving disc 10 and the driven disc 11 are separated by the rubber rings, and the rubber rings are cooperatively deformed under the extrusion action, so that the pressure among the driving disc 10, the driven disc 11 and the magnetorheological fluid 14 is increased, namely the magnetorheological fluid 14 in the working gap is extruded, and the extrusion strengthening effect of the magnetorheological fluid 14 is enhanced along with the increase of a magnetic field, so that the transmission power of the clutch is further improved.

3. The performance of the magnetorheological fluid 14 is reduced due to overhigh temperature caused by the continuous work of the clutch, and the existing research shows that if the temperature of the magnetorheological fluid 14 is higher than 70 ℃, the shear yield stress of the magnetorheological fluid 14 is reduced by 24 percent, so that the torque transmitted by the clutch is reduced by 19.8 percent. In the scheme, under the action of high temperature, the shape memory alloy spring 17 extends and generates extrusion force on the armature 5, the armature 5 further extrudes the magnetorheological fluid 14, the driving disk 10, the driven disk 11, the inner rubber ring 12 and the outer rubber ring 13, so that the extrusion strengthening effect is further enhanced, meanwhile, the friction force among the driving disk 10, the driven disk 11 and the magnetorheological fluid 14 is increased, the effect of reducing the magnetorheological torque caused by temperature rise is compensated by the shape memory alloy, and the torque of the clutch is stable. Therefore, the transmission performance of the clutch under different temperature conditions is effectively ensured, and the transmission performance of the clutch meets the use requirement.

Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting the technical solutions, and those skilled in the art should understand that those modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions, and all should be covered in the scope of the claims of the present invention.

Claims

1. The utility model provides a multi-disk magnetorheological clutch based on electromagnetic force extrusion, includes driving shaft, driven housing and driven shaft, its characterized in that: the driven shell comprises a left shell, a driven cylinder, an armature and a blank cap, and the left shell is fixedly connected with the left end of the driven cylinder; the armature is positioned at the right end of the driven cylinder, the middle part of the armature protrudes rightwards to form a sleeve, and the armature is sleeved on the blank cap through the sleeve and is connected with the blank cap in a sliding fit manner through the fit of a key and a key groove; a plurality of guide shear rods are arranged on the left side of the armature and around the periphery of the armature corresponding to the position of the driven cylinder, guide holes are formed in the right end face of the driven cylinder and corresponding to the guide shear rods, one end of each guide shear rod is fixedly connected with the armature, and the other end of each guide shear rod extends into the guide holes and is connected with the guide holes in a sliding fit manner;

2. The electromagnetic force extrusion-based multi-disc magnetorheological clutch of claim 1, wherein: and a plurality of reset springs are arranged on the left side of the armature and around the periphery of the driven cylinder, the right end face of the driven cylinder is provided with a spring groove corresponding to the reset springs, the reset springs are positioned in the spring groove, one ends of the reset springs are fixedly connected with the groove bottom of the spring groove, and the other ends of the reset springs extend to the spring groove and are fixedly connected with the armature.

3. The electromagnetic force extrusion-based multi-disc magnetorheological clutch of claim 1, wherein: and the left side of the left shell is also provided with an electric brush slip ring which is arranged coaxially with the driving shaft and is fixedly connected with the left shell, and two ends of the excitation coil are connected with the electric brush slip ring.

4. The electromagnetic force extrusion-based multi-disc magnetorheological clutch of claim 1, wherein: the dust cover is of a cylindrical structure with one open end and the other closed end, the closed end of the dust cover is provided with a mounting hole and is sleeved on the driven shaft through the mounting hole, and the open end of the dust cover extends towards the direction of the driven cylinder and is sleeved on the driven cylinder.

5. The electromagnetic force extrusion-based multi-disc magnetorheological clutch of claim 1, wherein: through holes for the screw rods of the connecting bolts to penetrate are formed in the outer rubber ring and the driven plate and correspond to the positions of the connecting bolts, the through holes in the outer rubber ring between the driven plate and the armature are countersunk holes, and the bolt heads of the connecting bolts are located in the countersunk holes.

6. The electromagnetic force extrusion-based multi-disc magnetorheological clutch of claim 1, wherein: and the inner sides of the two bearings are respectively provided with a sealing ring which is sleeved on the driving shaft and seals a gap between the driving shaft and the left shell and a gap between the driving shaft and the blank cap.

7. The electromagnetic force extrusion-based multi-disc magnetorheological clutch of claim 1, wherein: and a sealing ring is also arranged between the armature and the blank cap, is sleeved on the blank cap and is fixedly connected with the blank cap.

8. The electromagnetic force extrusion-based multi-disc magnetorheological clutch of claim 1, wherein: the left side of the left shell is also provided with a transparent cover which is sleeved on the main shaft and is fixedly connected with the left shell, and a felt ring is arranged between the transparent cover and the driving shaft.

9. The electromagnetic force extrusion-based multi-disc magnetorheological clutch of claim 1, wherein: the left shell is also provided with a liquid injection hole, and a liquid injection screw plug is arranged in the liquid injection hole in a matching way.