CN110578759B - Magnetization type permanent magnetic coupler - Google Patents
Magnetization type permanent magnetic coupler Download PDFInfo
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- CN110578759B CN110578759B CN201910707160.2A CN201910707160A CN110578759B CN 110578759 B CN110578759 B CN 110578759B CN 201910707160 A CN201910707160 A CN 201910707160A CN 110578759 B CN110578759 B CN 110578759B
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- magnetized
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- 230000005291 magnetic effect Effects 0.000 title claims abstract description 107
- 230000005415 magnetization Effects 0.000 title description 15
- 239000003302 ferromagnetic material Substances 0.000 claims abstract description 10
- 230000008878 coupling Effects 0.000 claims description 17
- 238000010168 coupling process Methods 0.000 claims description 17
- 238000005859 coupling reaction Methods 0.000 claims description 17
- 230000017525 heat dissipation Effects 0.000 claims description 4
- 238000007789 sealing Methods 0.000 claims description 4
- 230000004323 axial length Effects 0.000 claims description 3
- 230000006698 induction Effects 0.000 claims description 3
- 230000005540 biological transmission Effects 0.000 abstract description 24
- 230000005294 ferromagnetic effect Effects 0.000 abstract description 8
- 230000000694 effects Effects 0.000 description 8
- 230000005389 magnetism Effects 0.000 description 8
- 238000012423 maintenance Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 4
- 238000009434 installation Methods 0.000 description 3
- 230000033228 biological regulation Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000000696 magnetic material Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D19/00—Clutches with mechanically-actuated clutching members not otherwise provided for
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Dynamo-Electric Clutches, Dynamo-Electric Brakes (AREA)
Abstract
The invention discloses a magnetized permanent magnetic coupler which comprises a first shaft body and a second shaft body, wherein a groove is formed in one end, close to the second shaft body, of the first shaft body; the invention can provide a magnetized permanent magnetic force coupler, which directly adopts the permanent magnetic ring to carry out transmission, so that the structure is simpler, the needed parts are fewer, the replacement is simpler and more convenient, the permanent magnetic ring is directly sleeved on the first shaft body and the second shaft body which are made of ferromagnetic materials to move, the magnetic loss is effectively reduced, the ferromagnetic part is magnetized by adopting the permanent magnet, and then the moment is transmitted by depending on the induced magnetic field after the ferromagnetic part is magnetized, rather than depending on the magnetic field of the permanent magnet, so that the magnetized permanent magnetic force coupler is an indirect permanent magnetic force transmission process.
Description
Technical Field
The invention relates to the field of transmission devices of magnetic couplers, in particular to a magnetized permanent magnet magnetic coupler.
Background
Most rotary machines are composed of a driving part and a driven part, with torque being transmitted between them by means of connections of various couplings, generally by means of direct rigid connections in the industry today. There are several forms of manifestation: a slide block coupling, a bellows coupling, a diaphragm coupling, a rigid coupling, a plum coupling, etc. The connection connects the driving shaft and the driven shaft together through direct contact, and the driving shaft drives the driven shaft to move. The connection mode puts a strict requirement on the alignment between the driving shaft and the driven shaft, so that the installation and debugging difficulty is higher and the period is longer; meanwhile, the direct connection can cause collision and abrasion between the two, energy loss is increased, axial movement can occur in serious cases, and further dangerous accidents are caused. The inventor also proposes a magnetic coupling, but most of the magnetic couplings are formed by nesting and distributing magnets in the circumferential direction of a main driven coupling and a driven coupling, so that the aim of isolating the main driven coupling and the driven coupling by using magnetic force is fulfilled. However, the existing magnetic coupler has the following disadvantages:
1. the existing magnetic coupler is complex in structure, a plurality of permanent magnets are required to be distributed and arranged on a disc according to a certain angle requirement to complete the transmission effect, and a magnetic moment is generated by means of a magnetic moment angle formed by rotation slip, so that the complexity of the mechanism is increased.
2. Most of the existing magnetic couplers adopt eddy current to transmit magnetic torque, and even if a shielding part is installed on a plurality of devices, the magnetic force loss is large due to the fact that the magnetic resistance of the magnetic force in the air is large and the magnetic circuits are relatively dispersed.
3. When the distance between a driving part and a driven part is adjusted, the required control force is larger, and the energy waste is increased.
4. The existing magnetic coupler needs professional technical personnel for maintenance in installation and maintenance, the maintenance cost is relatively high, and the maintenance procedure is relatively complex.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide the magnetized permanent magnetic coupler which is simpler in structure, less in required parts and more convenient to replace.
In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a magnetization formula permanent magnetism magnetic coupling ware, includes the first axis body and the second axis body, the one end that the first axis body is close to the second axis body is seted up flutedly, the one end integrated into one piece that the second axis body is close to the first axis body has the convex shoulder, recess and convex shoulder clearance fit realize the centering of the first axis body and the second axis body is arranged, first axis body and second axis body diaxon link sliding sleeve are equipped with the permanent magnetism magnetic ring.
Preferably, the length dimension of the shoulder extending into the groove is larger than the axial length dimension of the permanent magnet ring.
Preferably, the recess is the round hole, just the axis of recess and the coincidence of the axis of the first axle body, the convex shoulder is the cylinder, just the axis of convex shoulder and the coincidence of the axis of the second axle body.
Preferably, the first shaft body and the second shaft body are arranged in two-shaft alignment, and the central axis of the first shaft body and the central axis of the second shaft body coincide.
Preferably, a shaft shoulder is formed at the joint of the end face of the first shaft body and the second shaft body, the permanent magnet ring can cross the shaft shoulder and slide towards one end of the first shaft body, and the permanent magnet ring can also cross the shaft shoulder and slide towards one end of the second shaft body.
Preferably, the first shaft body and the second shaft body are both made of ferromagnetic materials.
Preferably, the permanent magnet ring is a circular permanent magnet, N, S poles of the permanent magnet ring are arranged along the central axes of the first shaft body and the second shaft body, that is, the magnetic line direction of the magnetic field of the permanent magnet ring is an axial direction.
Preferably, the permanent magnet ring is fixed inside the shielding magnetic shell, the two ends of the shielding magnetic shell are provided with sealing end covers, and the outer surface of the shielding magnetic shell is integrally formed with a plurality of annular heat dissipation grooves.
Preferably, the shielding magnetic shell is made of a non-ferromagnetic material.
Preferably, the shielding magnetic shell is connected with an axial movement adjusting unit in a transmission manner, and the axial movement adjusting unit drives the shielding magnetic shell to move along the axial directions of the first shaft body and the second shaft body.
Compared with the prior art, the invention has the following beneficial effects:
1) this kind of magnetization formula permanent magnetism magnetic coupling ware, through adopting the permanent magnetism magnetic ring magnetization master slave axis, realize the transmission of moment, this structure directly adopts the permanent magnetism magnetic ring to carry out the transmission for the structure is simpler, and required spare part still less, and it is more simple and convenient to change, effectively solves current magnetic coupling ware and maintains that cost of maintenance is higher relatively, and the maintenance procedure is more complicated problem relatively.
2) According to the magnetization type permanent magnet magnetic coupler provided by the invention, the permanent magnet ring is directly sleeved on the first shaft body and the second shaft body which are made of ferromagnetic materials to move, so that the magnetic force loss is effectively reduced, the ferromagnetic part is magnetized by adopting the permanent magnet, and then the moment is transmitted by depending on the magnetized induction magnetic field of the ferromagnetic part instead of depending on the magnetic field of the permanent magnet, so that the magnetization type permanent magnet magnetic coupler is an indirect permanent magnet magnetic force transmission process instead of a direct permanent magnet ferromagnetic force transmission process; when the distance between the main moving part and the driven part is adjusted, the required control force is small.
3) According to the magnetization type permanent magnet magnetic coupler provided by the invention, the first shaft body and the second shaft body are arranged in two shaft centers, and shaft holes are in clearance fit at the shaft ends of the two shafts.
Drawings
FIG. 1 is a schematic structural diagram of a magnetized permanent magnetic coupler according to the present invention;
FIG. 2 is a schematic diagram illustrating the positions of the permanent magnet rings when the first shaft and the second shaft of the magnetized permanent magnet magnetic coupler according to the present invention are disconnected from transmission;
FIG. 3 is a schematic view of an installation of a magnetized permanent magnet magnetic coupler according to the present invention;
in the figure: 1. a first shaft body; 2. a second shaft body; 3. a permanent magnet ring; 4. a shield magnetic housing; 5. sealing the end cap; 6. a shoulder is formed; 7. a groove; 8. a shaft shoulder; 9. a heat sink; 10. the adjusting unit is moved axially.
Detailed Description
In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.
Example 1
As shown in fig. 1, a magnetization type permanent magnetic coupler comprises a first shaft body 1 and a second shaft body 2, wherein a groove 7 is formed in one end, close to the second shaft body 2, of the first shaft body 1, a shoulder 6 is integrally formed in one end, close to the first shaft body 1, of the second shaft body 2, the groove 7 is in clearance fit with the shoulder 6, the first shaft body 1 and the second shaft body 2 are arranged in a centering mode, and a permanent magnetic ring 3 is slidably sleeved at the two shaft connecting end of the first shaft body 1 and the second shaft body 2.
As shown in fig. 1, the length dimension of the shoulder 6 extending into the groove 7 is greater than the axial length dimension of the permanent magnet ring 3; by adopting the above design, when the permanent magnet ring 3 is in the position shown in fig. 1, that is, when the permanent magnet ring 3 is axially and symmetrically arranged relative to the shaft shoulder 8, the magnetic coupler reaches the maximum load working state, and transmits the maximum torque between the first shaft body 1 and the second shaft body 2, at this time, the magnetized part of the shoulder 6 is completely located within the width range of the permanent magnet ring 3; when the maximum transmission torque value of the coupler is not exceeded, the first shaft body 1 and the second shaft body 2 of the magnetic coupler rotate at the same speed.
As shown in fig. 1, the groove 7 is a circular hole, the central axis of the groove 7 coincides with the central axis of the first shaft body 1, the shoulder 6 is a cylinder, and the central axis of the shoulder 6 coincides with the central axis of the second shaft body 2.
As shown in fig. 1, the first shaft body 1 and the second shaft body 2 are arranged in two-axis alignment, and the central axis of the first shaft body 1 coincides with the central axis of the second shaft body 2.
As shown in fig. 1, a shaft shoulder 8 is formed at the joint of the end surface of the first shaft body 1 and the second shaft body 2, the first shaft body 1 can be a driving shaft or a driven shaft, similarly, the second shaft body 2 can be a driving shaft or a driven shaft, the driving shaft and the driven shaft are matched with the shaft shoulder 8 at the end surface, and the shoulder 6 and the groove 7 are axially matched, so that the connection is stable.
The permanent magnet ring 3 can cross the shaft shoulder 8 and slide towards one end of the first shaft body 1, and when the permanent magnet ring 3 is completely moved out of the second shaft body 2, the permanent magnet ring 3 is only sleeved on the first shaft body 1.
The permanent magnet ring 3 can also cross the shaft shoulder 8 and slide towards one end of the second shaft body 2, when the permanent magnet ring 3 completely moves out of the first shaft body 1, the permanent magnet ring 3 is only sleeved on the second shaft body 2, in the embodiment, the first shaft body 1 is taken as a driving shaft, the second shaft body 2 is taken as a driven shaft, at the moment, transmission between the driving shaft and the driven shaft is disconnected, and the speed of the driven shaft continues to perform speed reduction rotation under the inertia effect until finally stopping.
When the permanent magnet ring 3 moves from the position shown in the figure 1 to the position shown in the figure 2, the magnetized length of the shoulder 6 and the groove 7 is transferred, and the torque and the rotating speed transmitted by the coupler are changed along with the change of the magnetized length transfer, so that the speed-regulating torque-changing function is realized.
The first shaft body 1 and the second shaft body 2 are made of ferromagnetic materials; through adopting such structural design, permanent magnetism magnetic ring 3 direct suit removes on ferromagnetic material's first axis body 1 and second axis body 2, adopts permanent magnet magnetization ferromagnetic part, then relies on the induction magnetic field transmission moment after ferromagnetic part is magnetized, is an indirect permanent magnetism power transmission process, and indirect permanent magnetism ferromagnetic power transmission process, and magnetic force coupler all does not adopt this mode as basic principle to carry out transmission, the transmission of magnetic moment on the market.
The permanent magnet ring 3 is a ring-shaped permanent magnet, and N, S poles of the permanent magnet ring 3 are arranged along the central axes of the first shaft body 1 and the second shaft body 2, that is, the magnetic line direction of the magnetic field of the permanent magnet ring 3 is an axial direction.
As shown in fig. 1, the permanent magnet ring 3 is fixed inside the shielding magnetic shell 4, the two ends of the shielding magnetic shell 4 are provided with the sealing end covers 5, and the outer surface of the shielding magnetic shell 4 is integrally formed with a plurality of annular heat dissipation grooves 9, so that the heat dissipation effect of the core part of the permanent magnet magnetic coupler can be ensured.
The shielding magnetic shell 4 is made of non-ferromagnetic material.
As shown in fig. 3, the shielding magnetic shell 4 is in transmission connection with an axial movement adjusting unit 10, and the axial movement adjusting unit 10 drives the shielding magnetic shell 4 to move along the axial directions of the first shaft body 1 and the second shaft body 2; the axial movement adjusting unit 10 may include a control device and a device for controlling the moving fork to drive the shielding magnetic shell 4 to move through the control device, and specifically, a screw device may be adopted, and the screw device is a conventional structure in the prior art, so the screw device is not shown in detail in the drawings; in the moving process of the shielding magnetic shell 4, the permanent magnetic ring 3 is driven to move together, so that the permanent magnetic ring 3 is controlled to move back and forth, the transmission connection and disconnection between the first shaft body 1 and the second shaft body 2 are realized, and finally the effect of transmitting different torques and rotating speeds is achieved.
In addition, the speed of the movable shifting fork driving the shielding magnetic shell 4 and the permanent magnetic ring 3 to move together is controlled by the control equipment, so that the magnetic coupler has a speed regulation function. When the permanent magnet ring 3 moves from the position of the magnetic coupler in the maximum load working state to the transmission disconnection position between the driving shaft and the driven shaft, the magnetization effect of the transmission part at the joint of the driving shaft and the driven shaft is gradually reduced, the driving shaft and the driven shaft keep synchronous rotating speed, the rotating speed of the driven shaft is reduced along with the reduction of the magnetic torque, and finally the rotating speed of the driven shaft is gradually stopped when the permanent magnet ring 3 completely slides away. In turn, the rotation speed of the driven shaft can realize the soft starting process from stop rotation to synchronous rotation with the driving shaft, and the loss of the transmission part is reduced.
The invention relates to a magnetization type permanent magnetic coupler, which is a permanent magnetic coupler applying magnetization effect, and the working principle of the magnetization type permanent magnetic coupler mainly depends on the magnetization effect to enable a magnetic material to be magnetized by a permanent magnet, so as to transmit torque between a first shaft body 1 and a second shaft body 2; when the permanent magnet ring 3 is located at the position shown in fig. 1, the magnetic coupler reaches a maximum load working state, and when the maximum transmission torque value of the coupler is not exceeded, the first shaft body 1 and the second shaft body 2 of the magnetic coupler rotate at the same speed; when the permanent magnet ring 3 is located at the position shown in fig. 2, the transmission between the first shaft body 1 and the second shaft body 2 of the magnetic coupler is disconnected; when the permanent magnet ring 3 is located at other positions in the middle of the positions shown in fig. 1 and fig. 2, the speed regulation function of the magnetic coupler can be realized.
The foregoing shows and describes the general principles and broad features of the present invention and advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (10)
1. A magnetized permanent magnet magnetic coupler comprises a first shaft body (1) and a second shaft body (2), and is characterized in that: a groove (7) is formed in one end, close to the second shaft body (2), of the first shaft body (1), a convex shoulder (6) is integrally formed in one end, close to the first shaft body (1), of the second shaft body (2), the concave shoulder (7) is in clearance fit with the convex shoulder (6), centering arrangement of the first shaft body (1) and the second shaft body (2) is achieved, a permanent magnet ring (3) is slidably sleeved at the two shaft connecting end of the first shaft body (1) and the second shaft body (2), the permanent magnet ring (3) is directly sleeved on the first shaft body (1) and the second shaft body (2) made of ferromagnetic materials to move, when the permanent magnet ring (3) is axially and symmetrically arranged relative to the shaft shoulder (8), the magnetic coupler achieves a maximum load working state, maximum torque is transmitted between the first shaft body (1) and the second shaft body (2), and the magnetized portion of the convex shoulder (6) is completely located within the width range of the permanent magnet ring (3, and the moment is transmitted by means of the magnetized induction magnetic field.
2. A magnetized permanent-magnet magnetic coupling according to claim 1, wherein the length dimension of the shoulder (6) extending into the recess (7) is greater than the axial length dimension of the permanent-magnet ring (3).
3. The magnetized permanent magnetic coupler according to claim 2, wherein the groove (7) is a circular hole, a central axis of the groove (7) coincides with a central axis of the first shaft body (1), the shoulder (6) is a cylinder, and a central axis of the shoulder (6) coincides with a central axis of the second shaft body (2).
4. A magnetized permanent-magnet magnetic coupling according to claim 3, characterized in that the first shaft body (1) and the second shaft body (2) are arranged in two-axis alignment, and the central axis of the first shaft body (1) and the central axis of the second shaft body (2) coincide.
5. A magnetized permanent magnet magnetic coupler according to claim 4, wherein a shoulder (8) is formed at a joint of the end surface of the first shaft body (1) and the second shaft body (2), the permanent magnet ring (3) can slide to one end of the first shaft body (1) over the shoulder (8), and the permanent magnet ring (3) can also slide to one end of the second shaft body (2) over the shoulder (8).
6. A magnetized permanent-magnet magnetic coupler according to claim 5, wherein the first shaft body (1) and the second shaft body (2) are made of ferromagnetic material.
7. A magnetized permanent magnet magnetic coupler according to claim 6, wherein the permanent magnet ring (3) is a ring-shaped permanent magnet, and N, S poles of the permanent magnet ring (3) are arranged along the central axes of the first shaft body (1) and the second shaft body (2), i.e. the magnetic lines of force of the magnetic field of the permanent magnet ring (3) are in the axial direction.
8. A magnetized permanent magnetic coupler according to claim 7, wherein the permanent magnetic ring (3) is fixed inside the shielding magnetic shell (4), the two ends of the shielding magnetic shell (4) are provided with sealing end caps (5), and the outer surface of the shielding magnetic shell (4) is integrally formed with a plurality of annular heat dissipation grooves (9).
9. A magnetized permanent-magnet magnetic coupler according to claim 8, wherein the shielding magnetic shell (4) is made of non-ferromagnetic material.
10. A magnetized permanent-magnet magnetic coupler according to claim 9, wherein the shielding magnetic housing (4) is drivingly connected with an axial movement adjusting unit (10), and the axial movement adjusting unit (10) drives the shielding magnetic housing (4) to move axially along the first shaft body (1) and the second shaft body (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910707160.2A CN110578759B (en) | 2019-08-01 | 2019-08-01 | Magnetization type permanent magnetic coupler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910707160.2A CN110578759B (en) | 2019-08-01 | 2019-08-01 | Magnetization type permanent magnetic coupler |
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| Publication Number | Publication Date |
|---|---|
| CN110578759A CN110578759A (en) | 2019-12-17 |
| CN110578759B true CN110578759B (en) | 2020-09-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910707160.2A Active CN110578759B (en) | 2019-08-01 | 2019-08-01 | Magnetization type permanent magnetic coupler |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112594297B (en) * | 2020-02-06 | 2022-04-15 | 瑞安市祥晟汽车部件有限公司 | One-way clutch capable of realizing separation and non-contact |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2004099640A2 (en) * | 2003-05-09 | 2004-11-18 | Simonsvoss Technologies Ag | Device and method for transmitting movement |
| CN202178693U (en) * | 2011-08-02 | 2012-03-28 | 中山大洋电机制造有限公司 | Motor rotor structure |
| CN103414312A (en) * | 2013-08-15 | 2013-11-27 | 甘肃省科学院磁性器件研究所 | Stacked type permanent magnet speed controller |
| CN105715699A (en) * | 2016-04-19 | 2016-06-29 | 镇江索达联轴器有限公司 | Coupler |
| CN206341129U (en) * | 2016-10-14 | 2017-07-18 | 刁俊起 | A kind of flexible clutch |
| CN206608483U (en) * | 2017-02-22 | 2017-11-03 | 无锡职业技术学院 | A kind of unilateral transmission clutch with permanent magnet |
| DE102018108903A1 (en) * | 2017-05-04 | 2018-11-08 | Schaeffler Technologies AG & Co. KG | Method for attaching a magnet to a threaded spindle of an actuator |
| CN109707755A (en) * | 2019-01-31 | 2019-05-03 | 山东钢铁股份有限公司 | A kind of shaft coupling |
-
2019
- 2019-08-01 CN CN201910707160.2A patent/CN110578759B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2004099640A2 (en) * | 2003-05-09 | 2004-11-18 | Simonsvoss Technologies Ag | Device and method for transmitting movement |
| CN202178693U (en) * | 2011-08-02 | 2012-03-28 | 中山大洋电机制造有限公司 | Motor rotor structure |
| CN103414312A (en) * | 2013-08-15 | 2013-11-27 | 甘肃省科学院磁性器件研究所 | Stacked type permanent magnet speed controller |
| CN105715699A (en) * | 2016-04-19 | 2016-06-29 | 镇江索达联轴器有限公司 | Coupler |
| CN206341129U (en) * | 2016-10-14 | 2017-07-18 | 刁俊起 | A kind of flexible clutch |
| CN206608483U (en) * | 2017-02-22 | 2017-11-03 | 无锡职业技术学院 | A kind of unilateral transmission clutch with permanent magnet |
| DE102018108903A1 (en) * | 2017-05-04 | 2018-11-08 | Schaeffler Technologies AG & Co. KG | Method for attaching a magnet to a threaded spindle of an actuator |
| CN109707755A (en) * | 2019-01-31 | 2019-05-03 | 山东钢铁股份有限公司 | A kind of shaft coupling |
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| CN110578759A (en) | 2019-12-17 |
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Effective date of registration: 20230920 Address after: 230000 B-1015, wo Yuan Garden, 81 Ganquan Road, Shushan District, Hefei, Anhui. Patentee after: HEFEI MINGLONG ELECTRONIC TECHNOLOGY Co.,Ltd. Address before: No. 199 Guangming South Street, Hanshan District, Handan City, Hebei Province, 056006 Patentee before: HEBEI University OF ENGINEERING |
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Effective date of registration: 20240418 Address after: No.266, Dani Road, Shatian Town, Dongguan City, Guangdong Province, 523000 Patentee after: Dongguan Yuyue Permanent Magnet Technology Co.,Ltd. Country or region after: China Address before: 230000 B-1015, wo Yuan Garden, 81 Ganquan Road, Shushan District, Hefei, Anhui. Patentee before: HEFEI MINGLONG ELECTRONIC TECHNOLOGY Co.,Ltd. Country or region before: China |