CN212155672U - Slip-free double-roller type magnetorheological stepless power transmission device - Google Patents
Slip-free double-roller type magnetorheological stepless power transmission device Download PDFInfo
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- CN212155672U CN212155672U CN202020793191.2U CN202020793191U CN212155672U CN 212155672 U CN212155672 U CN 212155672U CN 202020793191 U CN202020793191 U CN 202020793191U CN 212155672 U CN212155672 U CN 212155672U
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- 230000033228 biological regulation Effects 0.000 abstract description 8
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- 230000033001 locomotion Effects 0.000 description 2
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Abstract
The utility model discloses a no slip is to stepless power transmission of roll-type magnetic current change. Comprises a driving part and a driven part which are in a central symmetrical cylinder type pair roller structure; the driving part comprises a driving shaft (3), a driving shaft bearing (7) which is matched with the driving shaft, and a driving roller (4) which is fixedly connected with the driving shaft through a key; the driven part comprises a driven shaft (17), a driven shaft bearing (12) matched with the driven shaft and a driven roller (11) fixedly connected with the driven shaft through a key; two ends of the driving roller are movably provided with driving roller magnetic poles (10), and two ends of the driven roller are movably provided with driven roller magnetic poles (19); the driving roller and the driven roller are respectively provided with an axial excitation coil, a circumferential excitation coil and a radial excitation coil. The utility model discloses can realize the stepless speed regulation of no slip among the transmission process, effectively solve the themogenesis/the heat dissipation difficult problem among the magnetorheological suspensions transmission process, can promote power transmission efficiency by a wide margin.
Description
Technical Field
The utility model relates to a magnetorheological suspensions power transmission device specifically is a no slip is to stepless power transmission device of roll-type magnetic current rheology, belongs to mechanical power transmission technical field.
Background
A power transmission device is a device used in mechanical systems for regulating and transmitting power or motion. The magnetorheological fluid is a typical intelligent material, mainly comprises soft magnetic particles, base carrier fluid and additives wrapped on the surfaces of the soft magnetic particles, can cause the change of the shear yield stress of the magnetorheological fluid under the action of a magnetic field, is reversible, is suitable for various occasions requiring stepless speed regulation and high-power transmission, such as coal mines, fans and the like, but the common disc type double-roller transmission structure has serious slip phenomenon in the transmission process, has larger integral temperature rise problem of the device, and is not suitable for the occasions with severe working condition environments, such as coal mines and the like. The utility model discloses a novel cylinder pair roller structure, axial each point rotation rate is the same in the working gap, and no slip exists, and compares with disk pair roller, tapered pair roller, and the pair roller area of contact is bigger, can transmit great moment of torsion, reduce or even eliminate the rotation speed difference, restrain magnetorheological suspensions heat production. The transmission device is mainly composed of a driving part, a driven part and a shell, and magnetorheological fluid serving as a transmission medium is filled in a working space formed between the driving roller and the driven roller; meanwhile, by utilizing the controllable solidification characteristic of the magnetorheological fluid, different types and layers of exciting coils (circumferential coils, axial coils and radial coils) are arranged in the main/auxiliary pair roller device, and under the condition of introducing different currents or levels, the thickness of a magnetic field in a working gap is subjected to stepless change, so that the magnetorheological fluid with different thicknesses can be solidified, and further the stepless change of the transmission ratio of the pair roller is realized. Simultaneously, set up the magnetic conduction magnetic pole that can radial movement at the cylinder both ends, can effectively guide the magnetic circuit trend, increase the adjustability of magnetic field thickness, compare with disk magneto rheological power transmission device, the utility model has the advantages of simple structure when can carrying out stepless speed regulation, can eliminate the slip to a certain extent, reduces the energy waste.
At present, there are many patents for the research on magnetorheological actuators. In a Chinese patent 'a multi-excitation coil magnetorheological clutch' (application number: CN 201811266803.6) published in 2019, 1, month and 4, the device generates a working magnetic field in a mode of simultaneously electrifying the multi-excitation coils, effectively reduces the current stabilization time of an excitation coil and has high response speed; the magnetic field response speed of the working gap of the magnetorheological fluid is high, and the requirements of quick transmission occasions can be effectively met; the driving and driven disc sets are all of hollow structures, the transmission structure is simple, the heat dissipation effect is good, the problem of heat dissipation generated in the slip process can be partially solved, the magnetic field inside the device is disordered and uncontrollable, and the accurate regulation and control of the transmission ratio cannot be realized. In the Chinese patent 'planetary magnetorheological transmission device based on shearing-extrusion effect' (publication number: CN 110925380A) published in 2019, 12 and 6, the device utilizes a planetary gear structure to form a closed space, achieves the extrusion effect by changing the size of the closed space, can realize large-torque transmission and uniform transmission, simultaneously, the magnetorheological fluid is not influenced by centrifugal force, and can realize real-time adjustment of torque and rotating speed. Above-mentioned two kinds of utility model all take traditional magnetorheological suspensions transmission structure promptly the dual transmission form of driving and driven part coaxial line, when carrying out speed control, the difference in rotation is unavoidable, and the slip thermogenesis condition is serious.
SUMMERY OF THE UTILITY MODEL
To the problem that above-mentioned prior art exists, the utility model provides a there is not slip to stepless power transmission device of roll-type magnetic current becomes, not only innovate the transmission structure for cylinder transmission structure, can effectively reduce or even eliminate the rotational speed difference, restrain the heat production of magnetic current becomes liquid. Meanwhile, the exciting coil is arranged in the rotating part, and different types of exciting coils (a circumferential coil, an axial coil and a radial coil) are arranged at different positions in the rotating part, wherein the circumferential coil is arranged on the inner wall of the roller and is wound along the circumferential direction, and an axial magnetic field is generated in a working gap of the pair roller; the axial coil is arranged on the inner wall of the roller and is wound along the axial direction, and a circumferential magnetic field is generated in the working gap of the pair roller; the radial coil is arranged at the position of the roller close to the transmission interface of the pair roller, so that the magnetic field of the working gap is corrected, and the uniformity of the magnetic fields at different positions is adjusted. The coil can be wound into a plurality of layers (namely a multi-stage coil), each layer can be respectively connected with current, under the condition that different currents or levels are connected, the thickness of the magnetic field of the working gap can generate stepless change, magnetorheological fluids with different thicknesses can be solidified, and further the stepless change of the transmission ratio of the roller pair is realized. Meanwhile, excitation coil current sources of different types and different levels are independently arranged, the whole transmission device can flexibly change the magnetic field effect of a working space according to the working condition requirements, the energy consumption is reduced, and the overall economy and environmental protection performance of the device are improved. In addition, the two ends of the roller are provided with the magnetic conduction magnetic poles capable of moving in the radial direction, the trend of a magnetic circuit can be effectively guided, the adjustability of the thickness of the magnetic field is increased, the shell, the end cover, the shaft, the sealing device and the like in the device respectively adopt magnetic isolation materials such as brass, stainless steel and the like with superior performance according to working condition requirements and cost performance, the roller and the magnetic conduction magnetic poles adopt materials with better magnetic conductivity such as electrician pure iron, 20 steel and the like, the magnetic field intensity of a transmission working space is enhanced, and the leakage condition of magnetic lines is. Utility model discloses can realize the stepless speed regulation of no slip among the transmission process, reach the themogenesis/the heat dissipation difficult problem of effectively solving among the magnetorheological suspensions transmission process, can promote power transmission efficiency by a wide margin.
In order to achieve the purpose, the slip-free pair-roller type magnetorheological stepless power transmission device comprises a driving part, a driven part and a fixed part, wherein the driving part is arranged on a shell;
the driving part and the driven part form a cylindrical roller pair structure with central symmetry;
the driving part comprises a driving shaft, a driving shaft bearing matched with the driving shaft and a driving roller fixedly connected with the driving shaft through a key;
the driven part comprises a driven shaft, a driven shaft bearing matched with the driven shaft and a driven roller fixedly connected with the driven shaft through a key;
two ends of the driving roller are movably provided with driving roller magnetic poles, and two ends of the driven roller are movably provided with driven roller magnetic poles;
and the driving roller and the driven roller are respectively provided with an axial excitation coil, a circumferential excitation coil and a radial excitation coil.
Furthermore, the driving roller is divided into a left part and a right part by a central clapboard, an axial exciting coil of the driving roller is wound on the inner wall of one side of the driving roller along the axial direction, and a circumferential exciting coil of the driving roller is wound on the inner wall of the other side of the driving roller along the circumferential direction;
the driven roller is divided into a left part and a right part by a central clapboard, the inner wall of one side of the driven roller is wound with a driven roller axial exciting coil along the axial direction, and the inner wall of the other side of the driven roller is wound with a driven roller circumferential exciting coil along the circumferential direction.
Furthermore, an excitation coil mounting groove I is symmetrically formed in the inner wall of the driving roller, close to a double-roller transmission interface, and centered on a driving roller central partition plate, and a driving roller local radial excitation coil is mounted in the excitation coil mounting groove I;
and a driven roller center partition board is arranged on the inner wall of the driven roller close to the double-roller transmission interface, excitation coil mounting grooves II are symmetrically formed, and local radial excitation coils of the driven roller are mounted in the excitation coil mounting grooves II.
Further, the fixed part comprises a shell used for installing the driving part and the driven part, and a driving shaft end cover and a driven shaft end cover which are respectively installed on two sides of the driving part and the driven part.
Furthermore, driving shaft sealing devices are arranged on two sides of the driving roller, driven shaft sealing devices are arranged on two sides of the driven roller, and the driving shaft sealing devices and the driven shaft sealing devices are framework oil seal sealing pieces.
Compared with the prior art, the utility model adopts a cylinder type double-roller structure innovatively, the exciting coils are arranged in the rotating component, and meanwhile, the exciting coils (circumferential coils, axial coils and radial coils) of different types are arranged at different positions in the roller, and the circumferential coils are arranged on the inner wall of the roller and are wound along the circumferential direction, so that an axial magnetic field can be generated in the working gap of the double rollers; the axial coil is arranged on the inner wall of the roller and wound along the axial direction, and can generate a circumferential magnetic field in a working gap of the pair roller; the radial coil is arranged at the position of the roller close to the transmission interface of the pair roller, and can be used for correcting the magnetic field at the interface of the pair roller and adjusting the uniformity of the magnetic field at different positions. In addition, the coil can be wound into a plurality of layers (namely a multi-stage coil), each layer can be respectively connected with current, under the condition that different currents or levels are connected, the thickness of a magnetic field between the roller pair interfaces can generate stepless change, magnetorheological fluid with different thicknesses can be solidified, and further the stepless change of the transmission ratio of the roller pair is realized. Meanwhile, excitation coil current sources of different types and levels are independently arranged, the current can be adjusted according to the requirements, and the working state of each magnetic pole in the working space is adjusted, so that the effects of locally adjusting the magnetic field intensity of the working space, changing the transmission ratio and reducing the energy consumption of the whole device are achieved. The two ends of the roller are also provided with magnetic conduction magnetic poles capable of moving in the radial direction, so that the trend of a magnetic circuit can be effectively guided, and the adjustability of the thickness of a magnetic field is increased. In addition, materials such as brass and stainless steel with excellent magnetic isolation performance are adopted for the shell, the end cover, the shaft, the sealing device and the like in the device according to working condition requirements, materials with good magnetic conductivity such as electrician pure iron and 20 steel are adopted for the roller and the magnetic conductive magnetic pole, the space magnetic field intensity of a transmission part is enhanced, the leakage condition of magnetic lines of force is inhibited, and the whole transmission efficiency is improved. The utility model discloses can realize the stepless speed regulation of no slip, effectively solve the themogenesis/the heat dissipation difficult problem among the magnetorheological suspensions transmission process, can promote power transmission efficiency by a wide margin. Finally, the structure, design and process of each part of the driving part and the driven part of the slip-free double-roller magnetorheological stepless power transmission device are the same, batch processing can be carried out, and the economical efficiency is good.
Drawings
Fig. 1 is a schematic view of the main structure of the present invention;
FIG. 2 is a schematic view of the installation of the local radial excitation coil of the driving roller of the present invention;
FIG. 3 is a schematic view of the installation of the local radial excitation coil of the driven roller according to the present invention;
in the figure: 1. the device comprises a shell, 2, a driving shaft end cover, 3, a driving shaft, 4, a driving roller, 4-1, a first excitation coil mounting groove, 5, a driving roller axial excitation coil, 6, a driving roller circumferential excitation coil, 7, a driving shaft bearing, 8, a driving shaft sealing device, 9, a driving roller local radial excitation coil, 10, a driving roller magnetic conduction magnetic pole, 11, a driven roller, 11-1, a second excitation coil mounting groove, 12, a driven shaft bearing, 13, a driven shaft sealing device, 14, a driven roller circumferential excitation coil, 15, a driven roller axial excitation coil, 16, a driven shaft end cover, 17, a driven shaft, 18, a driven roller local radial excitation coil, 19 and a driven roller magnetic conduction magnetic pole.
Detailed Description
The present invention will be further explained with reference to the accompanying drawings.
As shown in FIG. 1, the slip-free pair-roller type magnetorheological stepless power transmission device comprises a driving part arranged on a shell 1, a driven part arranged in a matching way with the driving part, and a fixed part;
the driving part and the driven part form a cylindrical pair roller structure with central symmetry, the rotating speed of each axial point at the working gap of a pair roller interface is the same, no slip exists, the contact area of the pair roller is large, and large torque can be transmitted.
The driving part comprises a driving shaft 3, a driving shaft bearing 7 matched with the driving shaft 3 and a driving roller 4 fixedly connected with the driving shaft 3 through a key;
the driven part comprises a driven shaft 17, a driven shaft bearing 12 matched with the driven shaft 17 and a driven roller 11 fixedly connected with the driven shaft 17 through a key;
two ends of the driving roller 4 are movably provided with driving roller magnetic poles 10, and two ends of the driven roller 11 are movably provided with driven roller magnetic poles 19; the magnetic conductive magnetic pole is connected with the driving/driven roller through a bolt. The same type threaded holes are formed in different positions on the driving/driven roller, and the magnetic conductive magnetic poles can be radially movably adjusted by changing the connecting positions of the magnetic conductive magnetic poles and the driving/driven roller. The trend of the magnetic circuit can be effectively guided, the adjustability of the thickness of the magnetic field is increased, and the stepless change of the transmission ratio of the whole device is further realized.
The driving roller 4 and the driven roller 11 are respectively provided with an axial excitation coil, a circumferential excitation coil and a radial excitation coil. The working space formed by the driving roller 4 and the driven roller 11 is filled with magnetorheological fluid. The exciting coil is arranged on the inner side of the rotating part, so that the volume of the whole device is further simplified, and the whole cost is reduced.
Further, the driving roller 4 is divided into a left part and a right part by a central partition board, an axial exciting coil 5 of the driving roller is wound on the inner wall of one side of the driving roller 4 along the axial direction, and a circumferential exciting coil 6 of the driving roller is wound on the inner wall of the other side of the driving roller along the circumferential direction;
the driven roller 11 is divided into a left part and a right part by a central partition board, the inner wall of one side of the driven roller 11 is wound with a driven roller axial excitation coil 15 along the axial direction, and the inner wall of the other side is wound with a driven roller circumferential excitation coil 14 along the circumferential direction.
The circumferential exciting coil can generate an axial magnetic field in the working gap of the pair roller, and the axial exciting coil generates a circumferential magnetic field in the working gap of the pair roller.
Further, as shown in fig. 2, excitation coil mounting grooves (4-1) are symmetrically formed in the inner wall of the driving roller (4) close to the transmission interface of the pair rollers by taking a central partition of the driving roller (4) as the center, and a local radial excitation coil (9) of the driving roller is mounted in the excitation coil mounting groove (4-1);
as shown in fig. 3, excitation coil mounting grooves two 11-1 are symmetrically formed in the inner wall of the driven roller 11 near the pair roller transmission interface with a center partition of the driven roller 11 as the center, and a driven roller local radial excitation coil 18 is mounted in the excitation coil mounting groove two 11-1.
The excitation coil mounting grooves are uniformly formed in the cylinder wall along the circumferential direction, the radial excitation coils can be well embedded into the excitation coil mounting grooves, and the excitation coil mounting grooves and the specific number of the corresponding radial excitation coils can be adjusted according to working condition requirements and transmission requirements. The radial exciting coil mainly acts on the magnetic field correction device, when the local magnetic field in a working space is detected to be uneven, the overall magnetic field effect can be improved only by adjusting the current of the radial magnetic field, the magnetic field correction device can be used for correcting the interface magnetic field of a roller, the uniformity of magnetic fields at different positions is adjusted, the transmission performance is enhanced, and the energy consumption is reduced.
The axial coil, the circumferential coil and the radial coil can be wound with a plurality of layers (namely, multi-stage coils), each layer can be respectively connected with current, under the condition that different currents or levels are connected, the thickness of a magnetic field of a working gap can generate stepless change, magnetorheological fluid with different thicknesses can be solidified, further stepless change of the transmission ratio of the pair rollers is realized, stepless speed regulation without slip is realized, the problem of heat generation/heat dissipation in the transmission process of the magnetorheological fluid is effectively solved, and meanwhile, the power transmission efficiency can be greatly improved. The excitation coil current sources of different types and different levels are respectively and independently arranged, each coil is respectively connected to the independently controlled program-controlled current source, and the working states of all magnetic poles in the working space can be adjusted by adjusting the size of the program-controlled current source according to requirements, so that the effects of locally adjusting the working magnetic field intensity, changing the transmission ratio and reducing the energy consumption of the whole device are achieved.
Further, the fixed part comprises a shell 1 for mounting a driving part and a driven part, and a driving shaft end cover 2 and a driven shaft end cover 16 which are respectively mounted at two sides of the driving part and the driven part.
Further, driving shaft sealing devices 8 are arranged on two sides of the driving roller 4, driven shaft sealing devices 13 are arranged on two sides of the driven roller 11, and the driving shaft sealing devices 8 and the driven shaft sealing devices 13 are framework oil seal sealing parts.
The axial position of a driving shaft bearing 7 is determined through a driving shaft end cover 2 and a driving shaft sealing device 8; the axial position of the driven shaft bearing 12 is determined by the driven shaft end cover 16 and the driven shaft sealing device 13. During the whole transmission process of the device, the bearing can move in the axial position due to the influence of factors such as external load and the like. In order to prevent the situation, the axial position of the bearing is fixed by adopting the end cover and the sealing device, the damage of the bearing is reduced, and the service life of the bearing is prolonged.
The shell 1, the end cover of the driving/driven shaft, the bearing of the driving/driven shaft and the sealing device of the driving/driven shaft in the device can respectively adopt magnetic isolation materials with excellent performance, such as brass, stainless steel and the like according to working condition requirements and cost performance, the overflow of magnetic lines of force is inhibited in the working process, and the integral transmission performance of the device is enhanced;
two rollers and corresponding magnetic poles in the device can adopt materials with better magnetic permeability, such as electrician pure iron, 20 steel and the like according to working condition requirements and cost performance, so that the trend of a magnetic circuit can be more effectively guided, the magnetic field intensity of a transmission space is enhanced, and the transmission power is improved;
the driving part and the driven part have the same structure, design and process, can be machined in batches and are good in economy.
To sum up, the utility model discloses the novelty adopts cylinder pair roller structure to place rotary part in the exciting coil in, simplify whole device volume, reduce cost. Meanwhile, different types of excitation coils (circumferential coils, axial coils and radial coils) are arranged at different positions in the roller, the circumferential coils are arranged on the inner wall of the roller and are wound along the circumferential direction, and an axial magnetic field can be generated in a working gap of the roller pair; the axial coil is arranged on the inner wall of the roller and wound along the axial direction, and can generate a circumferential magnetic field in a working gap of the pair roller; the radial coil is arranged at the position of the roller close to the transmission interface of the pair roller, and can be used for correcting the magnetic field at the interface of the pair roller and adjusting the uniformity of the magnetic field at different positions. In addition, the coil can be wound into a plurality of layers (namely, a multi-stage coil), each layer can be respectively connected with current, under the condition that different currents or levels are connected, the thickness of a magnetic field between the interfaces of the pair rollers can generate stepless change, magnetorheological fluid with different thicknesses can be solidified, further stepless change of transmission ratio of the pair rollers is realized, stepless speed regulation without slip is realized, the problem of heat generation/heat dissipation in the transmission process of the magnetorheological fluid is effectively solved, and the power transmission efficiency can be greatly improved. Meanwhile, excitation coil current sources of different types and different levels are independently arranged, the current can be adjusted according to the requirements, and each magnetic pole in the working space can be changed, so that the effects of locally adjusting the working magnetic field intensity, changing the transmission ratio and reducing the energy consumption of the whole device are achieved. In addition, the two ends of the roller are provided with magnetic conduction magnetic poles capable of moving in the radial direction in the working state, so that the trend of a magnetic circuit can be effectively guided, the adjustability of the thickness of the magnetic field is increased, and the stepless change of the transmission ratio of the whole device is further enhanced. In the device, a shell, an end cover, a shaft, a sealing device and the like are made of materials with superior performance such as brass, stainless steel and the like according to working condition requirements and cost performance, and the roller and the magnetic conduction magnetic pole are made of materials with better magnetic conductivity such as electrician pure iron, 20 steel and the like, so that the effects of enhancing the magnetic field intensity of a transmission working space and inhibiting the leakage of magnetic lines of force are achieved. Finally, the structure, design and process of each part of the driving part and the driven part of the slip-free double-roller magnetorheological stepless power transmission device are the same, batch processing can be carried out, the processing is convenient, and the economical efficiency of the whole device can be enhanced.
Claims (5)
1. A slip-free double-roller type magnetorheological stepless power transmission device comprises a driving part, a driven part and a fixed part, wherein the driving part is arranged on a shell (1), the driven part is matched with the driving part, and the fixed part is arranged on the driven part; it is characterized in that the preparation method is characterized in that,
the driving part and the driven part form a cylindrical roller pair structure with central symmetry;
the driving part comprises a driving shaft (3), a driving shaft bearing (7) which is matched with the driving shaft (3), and a driving roller (4) which is fixedly connected with the driving shaft (3) through a key;
the driven part comprises a driven shaft (17), a driven shaft bearing (12) matched with the driven shaft (17), and a driven roller (11) fixedly connected with the driven shaft (17) through a key;
two ends of the driving roller (4) are movably provided with driving roller magnetic poles (10), and two ends of the driven roller (11) are movably provided with driven roller magnetic poles (19);
and the driving roller (4) and the driven roller (11) are respectively provided with an axial excitation coil, a circumferential excitation coil and a radial excitation coil.
2. The slip-free pair-roller magnetorheological continuously variable power transmission device according to claim 1,
the driving roller (4) is divided into a left part and a right part by a central clapboard, an axial exciting coil (5) of the driving roller is wound on the inner wall of one side of the driving roller (4) along the axial direction, and a circumferential exciting coil (6) of the driving roller is wound on the inner wall of the other side of the driving roller along the circumferential direction;
the driven roller (11) is divided into a left part and a right part by a central clapboard, a driven roller axial exciting coil (15) is wound on the inner wall of one side of the driven roller (11) along the axial direction, and a driven roller circumferential exciting coil (14) is wound on the inner wall of the other side of the driven roller along the circumferential direction.
3. The slip-free pair-roller magnetorheological continuously variable power transmission device according to claim 1 or 2,
an exciting coil mounting groove I (4-1) is symmetrically formed in the inner wall of the driving roller (4) close to a double-roller transmission interface by taking a central partition of the driving roller (4) as the center, and a local radial exciting coil (9) of the driving roller is mounted in the exciting coil mounting groove I (4-1);
and a driven roller (11) central partition board is arranged on the inner wall of the driven roller (11) close to the pair roller transmission interface and is used as the center, excitation coil mounting grooves II (11-1) are symmetrically formed, and a driven roller local radial excitation coil (18) is mounted in the excitation coil mounting grooves II (11-1).
4. The slip-free pair-roller magnetorheological continuously variable power transmission device according to claim 1,
the fixing part comprises a shell (1) for mounting a driving part and a driven part, and a driving shaft end cover (2) and a driven shaft end cover (16) which are respectively mounted on two sides of the driving part and the driven part.
5. The slip-free pair-roller magnetorheological continuously variable power transmission device according to claim 1,
the driving roller (4) is provided with driving shaft sealing devices (8) on two sides, the driven roller (11) is provided with driven shaft sealing devices (13) on two sides, and the driving shaft sealing devices (8) and the driven shaft sealing devices (13) are framework oil seal sealing parts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020793191.2U CN212155672U (en) | 2020-05-14 | 2020-05-14 | Slip-free double-roller type magnetorheological stepless power transmission device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020793191.2U CN212155672U (en) | 2020-05-14 | 2020-05-14 | Slip-free double-roller type magnetorheological stepless power transmission device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212155672U true CN212155672U (en) | 2020-12-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020793191.2U Expired - Fee Related CN212155672U (en) | 2020-05-14 | 2020-05-14 | Slip-free double-roller type magnetorheological stepless power transmission device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212155672U (en) |
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2020
- 2020-05-14 CN CN202020793191.2U patent/CN212155672U/en not_active Expired - Fee Related
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