CN112290731A - Motor shaft assembly for motor and motor - Google Patents
Motor shaft assembly for motor and motor Download PDFInfo
- Publication number
- CN112290731A CN112290731A CN202011547337.6A CN202011547337A CN112290731A CN 112290731 A CN112290731 A CN 112290731A CN 202011547337 A CN202011547337 A CN 202011547337A CN 112290731 A CN112290731 A CN 112290731A
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- shaft body
- motor
- shaft assembly
- friction surface
- shaft
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/003—Couplings; Details of shafts
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
- H02K11/20—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection for measuring, monitoring, testing, protecting or switching
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
Abstract
The invention discloses a motor shaft assembly for a motor and the motor, the motor shaft assembly comprises: a first shaft body, one end of which is configured as an output end of the motor shaft assembly; the second shaft body is at least partially sleeved on the periphery of the first shaft body and is connected with a rotor of the motor; the first shaft body is provided with a first friction surface at the periphery, the second shaft body is provided with a second friction surface opposite to the first friction surface, and the first friction surface is in contact with the second friction surface so as to be suitable for transmitting torque. According to the motor shaft assembly for the motor, the first friction surface on the first shaft body is in surface-to-surface contact with the second friction surface on the second shaft body, so that torque is transmitted. And when the impact torque of the system exceeds a designed value, the first shaft body and the second shaft body can reduce or eliminate the impact torque through slipping, so that the motor shaft assembly is protected, and the reliability of the motor shaft assembly is further improved.
Description
Technical Field
The invention relates to the field of motors, in particular to a motor shaft assembly for a motor and the motor.
Background
In the related art, the output torque of the driving motor of the electric vehicle is transmitted to the speed reducer through the motor shaft, and further transmitted to the wheels through the transmission half shaft. However, the motor rotor, the speed reducer, the transmission half shaft and the wheels are rigidly connected during the whole transmission chain, and the rigid connection is easy to generate larger impact torque which can reach more than twice of the designed value, so that the transmission chain is damaged. At present, a clutch is arranged between an engine and a transmission on an oil-burning automobile, when impact exceeds a designed value, the clutch can slip, so that the impact is reduced or even eliminated, and if a clutch structure is added between a motor and a speed reducer on the electric automobile, the structural complexity is increased.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art. To this end, an object of the present invention is to provide a motor shaft for an electric motor, which realizes transmission of torque by bringing a first friction surface on a first shaft body into surface-to-surface contact with a second friction surface on a second shaft body. And the first shaft body and the second shaft body can reduce or eliminate impact torque through slipping, so that the motor shaft assembly is protected, and the reliability of the motor shaft assembly is further improved.
According to a motor shaft assembly for a motor of the present invention, the motor shaft assembly includes: a first shaft body having one end configured as an output end of the motor shaft assembly; the second shaft body is at least partially sleeved on the periphery of the first shaft body and is connected with the rotor of the motor; the first shaft body is provided with a first friction surface at the periphery, the second shaft body is provided with a second friction surface opposite to the first friction surface, and the first friction surface is in contact with the second friction surface so as to be suitable for transmitting torque.
According to the motor shaft assembly for the motor, the motor shaft assembly achieves the effect of transmitting the torque of the motor rotor to the speed reducer through the first shaft body and the second shaft body by enabling the first friction surface on the first shaft body to be in surface-to-surface contact with the second friction surface on the second shaft body. And when the impact torque of the system exceeds a designed value, the first shaft body and the second shaft body can reduce or eliminate the impact torque through slipping, so that the motor shaft assembly is protected, and the reliability of the motor shaft assembly is further improved.
According to one embodiment of the invention, the first shaft body comprises: a shaft body, one end of the shaft body being configured as the output end; the friction ring is sleeved on the periphery of the shaft body, and the outer surface of the friction ring is configured as the first friction surface.
According to one embodiment of the invention, a first reducing section is arranged on the shaft body, and the outer diameter of the first reducing section in the extending direction is gradually reduced or increased; the second shaft body is internally provided with a second variable diameter section opposite to the first variable diameter section, the friction ring is arranged between the first variable diameter section and the second variable diameter section, and the inner surface of the second variable diameter section is constructed into a second friction surface.
According to one embodiment of the invention, the motor shaft assembly further comprises: the preload piece is arranged between the other end of the first shaft body and the second shaft body and is suitable for keeping the pressure between the first variable-diameter section and the second variable-diameter section.
According to one embodiment of the invention, an accommodating cavity suitable for accommodating the first shaft body is arranged in the second shaft body, at least part of the inner wall of the accommodating cavity is configured as the second variable diameter section, and an abutting protrusion suitable for abutting against the preload piece is formed in the accommodating cavity.
According to one embodiment of the invention, the preload member comprises: the spring is sleeved on the periphery of the first shaft body, and one end of the spring is abutted to the abutting bulge; and the locking cover is arranged at the other end of the first shaft body and is abutted against the other end of the spring.
According to an embodiment of the present invention, a fitting hole is formed in the other end of the first shaft body, a first spline is formed on an inner wall of the fitting hole, a protrusion portion adapted to extend into the fitting hole is formed on the locking cover, and a second spline fitted to the first spline is formed on an outer peripheral wall of the protrusion portion.
According to one embodiment of the invention, the motor shaft assembly further comprises: the fastener, be provided with on the bellying and be suitable for the via hole that the fastener passed, mating holes with fastener screw-thread fit is with the adjustment the bellying with the mating hole between the cooperation length.
According to one embodiment of the invention, the motor shaft assembly further comprises: and the outer ring of the thrust bearing is matched with the stopping bulge, and the inner ring of the thrust bearing is matched with the first shaft body and is stopped against one end of the spring.
The motor according to the present invention is briefly described below.
The motor according to the present invention has the motor shaft assembly of the above-mentioned embodiment, and the motor according to the present invention has the motor shaft assembly of the above-mentioned embodiment, so the motor shaft of the motor is a separate body, and is composed of the first shaft body and the second shaft body, when the impact torque of the system exceeds the design value, the first shaft body and the second shaft body can reduce or eliminate the impact torque through slipping, so as to protect the motor shaft assembly, and further improve the reliability of the motor.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a schematic structural view of a motor according to an embodiment of the present invention;
FIG. 2 is a schematic structural view of a motor shaft assembly according to an embodiment of the present invention;
FIG. 3 is an enlarged partial view of circle A of FIG. 2;
FIG. 4 is a schematic structural diagram of a first shaft according to an embodiment of the invention;
FIG. 5 is a schematic structural diagram of a second shaft according to an embodiment of the invention;
FIG. 6 is a schematic structural view of a friction ring according to an embodiment of the present invention;
fig. 7 is a schematic structural view of a pre-tightening cap according to an embodiment of the present invention.
Reference numerals:
a motor shaft assembly 1, a first shaft body 11, a shaft body 111, a first reducing section 1111,
the preload member 13, the spring 131, the locking cap 132, the locking protrusion 1321, the projection 1322,
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
A motor shaft assembly 1 for a motor 2 according to an embodiment of the present invention is described below with reference to fig. 1 to 7, the motor shaft assembly 1 including a first shaft body 11 and a second shaft body 12. One end of the first shaft 11 is configured as an output end of the motor shaft assembly 1, and at least a part of the second shaft 12 is sleeved on the outer periphery of the first shaft 11 and connected with a rotor of the motor 2. Wherein, the first shaft body 11 is provided with a first friction surface at the periphery, the second shaft body 12 is provided with a second friction surface opposite to the first friction surface, and the first friction surface is contacted with the second friction surface so as to be suitable for transmitting torque.
In the related art, the output torque of the driving motor of the electric vehicle is transmitted to the speed reducer through the motor shaft, and further transmitted to the wheels through the transmission half shaft. However, the motor rotor, the speed reducer, the transmission half shaft and the wheels are rigidly connected during the whole transmission chain, and the rigid connection is easy to generate larger impact torque which can reach more than twice of the designed value, so that the transmission chain is damaged. At present, a clutch is arranged between an engine and a transmission on an oil-burning automobile, when impact exceeds a designed value, the clutch can slip, so that the impact is reduced or even eliminated, and if a clutch structure is added between a motor and a speed reducer on the electric automobile, the structural complexity is increased.
Specifically, as shown in fig. 1, in one embodiment of the present invention, one end of the first shaft body 11 is configured as an output end, and the output end is matched with the speed reducer, so as to achieve the effect of transmitting the torque of the motor shaft assembly 1 to the speed reducer. At least part of the second shaft body 12 is sleeved on the periphery of the first shaft body 11, so that the second shaft body 12 is matched with the first shaft body 11, and the second shaft body 12 is connected with the rotor of the motor 2, so that the output torque of the rotor of the motor 2 is transmitted to the second shaft body 12.
The first shaft 11 is provided with a first friction surface, and the second shaft 12 is provided with a second friction surface corresponding to the first friction surface. The first friction surface and the second friction surface are in surface-to-surface contact, torque can be transmitted between the first shaft body 11 and the second shaft body 12 by using friction force, the torque on the second shaft body 12 is transmitted to the first shaft body 11 by the friction force between the first friction surface and the second friction surface, so that the torque generated by the motor is transmitted to the speed reducer by the motor shaft assembly 1, and when the torque generated by the motor rotor exceeds the maximum static friction force between the first friction surface and the second friction surface, relative rotation occurs between the first shaft body 11 and the second shaft body 12, so that the motor 2 is prevented from outputting the torque exceeding the maximum limit value of the speed reducer to the speed reducer, and torque impact is reduced.
In short, the motor shaft assembly 1 performs the function of transmitting the torque of the rotor of the motor 2 to the speed reducer through the first shaft body 11 and the second shaft body 12 by bringing the first friction surface on the first shaft body 11 into surface-to-surface contact with the second friction surface on the second shaft body 12. When the impact torque of the system exceeds a designed value, the first shaft body 11 and the second shaft body 12 can be slipped to reduce or eliminate the impact torque, so that the motor shaft assembly 1 is protected, and the reliability of the motor shaft assembly 1 is further improved.
According to one embodiment of the present invention, the first shaft body 11 includes a shaft body 111 and a friction ring 112. One end of the shaft body 111 is configured as an output end, the output end is engaged with the speed reducer, and the other end of the shaft body 111 is engaged with at least a portion of the second shaft body 12. The friction ring 112 is sleeved on the periphery of the shaft body 111, and the friction ring 112 has the function of providing friction force. The outer surface of the friction ring 112 is configured as a first friction surface, and when the first friction surface contacts with a second friction surface to generate a friction force, a torque can be transmitted from the second shaft body 12 to the first shaft body 11 by the friction force.
Further, the inner periphery of the friction ring 112 and the outer periphery of the shaft body 111 may be in surface-to-surface contact with each other to transmit torque by friction force. The friction ring 112 may be made of a wear-resistant material to improve the service life of the first shaft 11.
In one embodiment of the present invention, friction ring 112 is constructed as a piece of copper or copper alloy.
As shown in fig. 4, in an embodiment of the present invention, a first variable diameter section 1111 is provided on the shaft body 111, and the first variable diameter section 1111 may be configured to have a radius gradually decreasing in a direction away from the output end in the axial direction, a second variable diameter section opposite to the first variable diameter section 1111 is provided in the second shaft body 12, a friction ring 112 is provided between the first variable diameter section 1111 and the second variable diameter section, and an inner surface of the second variable diameter section is configured as a second friction surface. Further, the outer peripheral surface of the first reducing section 1111 is configured as a conical surface, the tapers of the first reducing section 1111 and the second reducing section are the same, and the first reducing section 1111 and the second reducing section are matched with each other, so that not only a limiting effect can be achieved, but also the first reducing section 1111 can be ensured to bear an axial positive pressure, and thus the friction force between the first friction surface and the second friction surface is improved. Further, the first reducing section 1111 is configured to be tapered, so that the area of the outer surface of the first reducing section 1111 is increased, and the areas of the first friction surface and the second friction surface are also increased, so that the contact area between the first friction surface and the second friction surface is increased, thereby increasing the maximum friction force that can be generated between the first friction surface and the second friction surface, and further widening the application range of the motor shaft assembly 1.
According to an embodiment of the present invention, the motor shaft assembly 1 further includes a preload member 13, the preload member 13 is disposed between the other end of the first shaft body 11 and the second shaft body 12, and the preload member 13 is adapted to maintain a pressing force between the first variable diameter section 1111 and the second variable diameter section. The preload piece 13 can provide a preload, and the preload can be adjusted through the preload piece 13, so that a positive pressure between the first friction surface and the second friction surface can be adjusted, the motor shaft assembly 1 can adjust the preload piece 13 according to the maximum torque which can be borne by the speed reducer, the torque generated when the first shaft body 11 and the second shaft body 12 slip is changed, and the motor shaft assembly 1 can be applied to a wider range.
According to an embodiment of the present invention, a receiving cavity is disposed in the second shaft body 12, and the receiving cavity is adapted to receive the first shaft body 11, so as to facilitate the matching of the first shaft body 11 and the second shaft body 12. Wherein at least a part of the inner wall of the receiving cavity is configured as a second variable diameter section corresponding to the first variable diameter section 1111, and an abutment protrusion 121 adapted to abut against the preload member 13 is further formed in the receiving cavity to restrict the movement of the preload member 13 in one direction in the axial direction, and the abutment protrusion 121 provides an axial force to the preload member 13 so that the preload member 13 maintains the pressing force between the first variable diameter section 1111 and the second variable diameter section.
According to one embodiment of the invention, the preload member 13 includes a spring 131 and a locking cover 132. The spring 131 is sleeved on the periphery of the first shaft 11, and one end of the spring 131 abuts against the abutting protrusion 121, so that the abutting protrusion 121 provides an axial supporting force for the spring 131, the locking cover 132 is disposed at the other end of the first shaft 11, and the locking cover 132 abuts against the other end of the spring 131, the spring 131 provides an axial pre-tightening force to the locking cover 132 through compression, wherein the magnitude of the axial pre-tightening force is related to the deformation amount of the spring 131.
According to an embodiment of the present invention, a fitting hole is formed in the other end of the first shaft body 11, and a projection 1322 is formed on the locking cover 132, the projection 1322 being adapted to extend into and fit into the fitting hole. Specifically, a first spline is formed on an inner wall of the fitting hole, and a second spline is provided on an outer peripheral wall of the projection 1322. The first spline and the second spline are screw-engaged, so that the projection 1322 is engaged with the engagement hole, and the screw-engagement can facilitate the mounting or dismounting of the engagement hole, thereby improving the mounting efficiency between the first shaft body 11 and the preload member 13.
Further, locking lid 132 includes, locking lid 132 body, this internal groove of dodging that is provided with of locking lid 132, locking arch 1321 set up in dodging the inslot and with the internal peripheral interval of locking lid 132 body, the periphery of locking lid 132 body still is provided with locking arch 1321, and locking arch 1321 extends towards the direction of spring 131 and ends with spring 131, and wherein, locking arch 1321 can be convenient for compress spring 131 to make spring 131 provide the pretightning force. A fitting gap is further formed between the locking protrusion 1321 and the protruding portion 1322, a peripheral wall 113 surrounding the fitting hole is disposed at an end portion of the other end of the first shaft body 11, and the peripheral wall 113 can extend into the fitting gap to improve a fitting stroke between the locking cover 132 and the first shaft body 11, so as to adjust a pre-tightening force of the pre-tightening member 13 and reduce a length of the first shaft body 11 in the axial direction.
According to an embodiment of the present invention, the motor shaft assembly 1 further includes a fastening member 14, the fastening member 14 is disposed at the other end of the first shaft body 11, the protruding portion 1322 is provided with a through hole through which the fastening member 14 passes, wherein an internal thread is disposed in the mating hole, the fastening member 14 passes through the through hole and then mates with the internal thread on the inner wall of the mating hole, so as to fix the locking cover 132 to the other end of the shaft body 111, and by adjusting the degree of threaded mating between the locking member and the mating hole, the mating length between the protruding portion 1322 and the mating hole is adjusted, so as to further adjust the magnitude of the pre-tightening force of.
According to an embodiment of the present invention, the motor shaft assembly 1 further includes a thrust bearing 15, an outer ring of the thrust bearing 15 is engaged with the stopping protrusion 121, an inner ring of the thrust bearing 15 is engaged with the first shaft 11 and stopped against one end of the spring 131, an outer ring of the thrust bearing 15 is engaged with the stopping protrusion 121 and fixed with the second shaft 12, and an outer ring of the thrust bearing 15 is sleeved on an outer periphery of the shaft body 111 for supporting the first shaft 11 and the second shaft 12 and providing a supporting force when the first shaft 11 and the second shaft 12 rotate relatively; and rollers are obliquely arranged between the inner ring of the thrust bearing 15 and the outer ring of the thrust bearing 15, and the rollers can be used for transmitting the axial force between the inner ring and the outer ring, so that the thrust bearing 15 can provide a supporting force for the spring 131 in the axial direction, and the first shaft body 11 and the second shaft body 12 can be ensured to rotate relatively while the spring 131 is kept supported.
The motor 2 according to the invention is briefly described below.
The motor 2 according to the present invention has the motor shaft assembly 1 of the above-mentioned embodiment, and since the motor 2 according to the present invention has the motor shaft assembly 1 of the above-mentioned embodiment, the motor shaft of the motor 2 is a separate body, and is composed of the first shaft body 11 and the second shaft body 12, when the impact torque of the system exceeds the design value, the first shaft body 11 and the second shaft body 12 can be slipped to reduce or eliminate the impact torque, so as to protect the motor shaft assembly 1 and further improve the reliability of the motor 2.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the invention.
In the description of the present invention, "the first feature" and "the second feature" may include one or more of the features.
In the description of the present invention, "a plurality" means two or more.
In the description of the present invention, the first feature being "on" or "under" the second feature may include the first and second features being in direct contact, and may also include the first and second features being in contact with each other not directly but through another feature therebetween.
In the description of the invention, "above", "over" and "above" a first feature in a second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is higher in level than the second feature.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (10)
1. A motor shaft assembly for a motor, comprising:
a first shaft body (11), one end of the first shaft body (11) being configured as an output end of the motor shaft assembly;
the second shaft body (12), at least part of the second shaft body (12) is sleeved on the periphery of the first shaft body (11) and is connected with the rotor of the motor; wherein
The first shaft body (11) is provided with a first friction surface at the periphery, the second shaft body (12) is provided with a second friction surface opposite to the first friction surface, and the first friction surface is in contact with the second friction surface so as to be suitable for transmitting torque.
2. The motor shaft assembly for an electric motor according to claim 1, wherein the first shaft body (11) comprises:
a shaft body (111), one end of the shaft body (111) being configured as the output end;
a friction ring (112), the friction ring (112) being fitted around the outer circumference of the shaft body (111), an outer surface of the friction ring (112) being configured as the first friction surface.
3. The motor shaft assembly for the motor according to claim 2, wherein the shaft body (111) is provided with a first reducing section (1111), and an outer diameter of the first reducing section (1111) in an extending direction is gradually reduced or increased; a second variable-diameter section opposite to the first variable-diameter section (1111) is arranged in the second shaft body (12), the friction ring (112) is arranged between the first variable-diameter section (1111) and the second variable-diameter section, and the inner surface of the second variable-diameter section is configured as the second friction surface.
4. The motor shaft assembly for an electric motor of claim 3, further comprising: a preload member (13), the preload member (13) being disposed between the other end of the first shaft body (11) and the second shaft body (12), the preload member (13) being adapted to maintain a pressing force between the first variable diameter section (1111) and the second variable diameter section.
5. The motor shaft assembly for an electric motor according to claim 4, wherein a receiving cavity adapted to receive the first shaft body (11) is provided in the second shaft body (12), at least a portion of an inner wall of the receiving cavity is configured as the second tapered section, and an abutting protrusion (121) adapted to abut against the preload member (13) is formed in the receiving cavity.
6. The motor shaft assembly for electric machines according to claim 5, characterized in that said preload member (13) comprises:
the spring (131) is sleeved on the periphery of the first shaft body (11), and one end of the spring (131) is abutted against the abutting protrusion (121);
and the locking cover (132), wherein the locking cover (132) is arranged at the other end of the first shaft body (11) and is abutted against the other end of the spring (131).
7. The motor shaft assembly for the motor as claimed in claim 6, wherein a fitting hole is formed in the other end of the first shaft body (11), a first spline is formed on an inner wall of the fitting hole, a projection (1322) adapted to extend into the fitting hole is formed on the locking cover (132), and a second spline fitted to the first spline is formed on an outer peripheral wall of the projection (1322).
8. The motor shaft assembly for an electric motor of claim 7, further comprising: the protruding portion (1322) is provided with a through hole suitable for the fastening piece (14) to pass through, and the matching hole is in threaded matching with the fastening piece (14) so as to adjust the matching length between the protruding portion (1322) and the matching hole.
9. The motor shaft assembly for an electric motor of claim 8, further comprising: the outer ring of the thrust bearing (15) is matched with the stopping protrusion (121), and the inner ring of the thrust bearing (15) is matched with the first shaft body (11) and stopped against one end of the spring (131).
10. An electric machine comprising a motor shaft assembly as claimed in any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011547337.6A CN112290731B (en) | 2020-12-24 | 2020-12-24 | Motor shaft assembly for motor and motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011547337.6A CN112290731B (en) | 2020-12-24 | 2020-12-24 | Motor shaft assembly for motor and motor |
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| Publication Number | Publication Date |
|---|---|
| CN112290731A true CN112290731A (en) | 2021-01-29 |
| CN112290731B CN112290731B (en) | 2021-04-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202011547337.6A Active CN112290731B (en) | 2020-12-24 | 2020-12-24 | Motor shaft assembly for motor and motor |
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| CN (1) | CN112290731B (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113890267A (en) * | 2021-09-09 | 2022-01-04 | 浙江华东光电仪器有限公司 | Torque cancellation automatic locking device and method for torque motor and motor |
| CN113890267B (en) * | 2021-09-09 | 2022-08-12 | 浙江华东光电仪器有限公司 | Torque cancellation automatic locking device and method for torque motor and motor |
| CN114024404A (en) * | 2021-11-08 | 2022-02-08 | 浙江鼎琛起重设备科技有限公司 | Regulation formula clutch motor of area protection |
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| Publication number | Publication date |
|---|---|
| CN112290731B (en) | 2021-04-02 |
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