CN222868629U - Motor - Google Patents
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- CN222868629U CN222868629U CN202421326699.6U CN202421326699U CN222868629U CN 222868629 U CN222868629 U CN 222868629U CN 202421326699 U CN202421326699 U CN 202421326699U CN 222868629 U CN222868629 U CN 222868629U
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- heat dissipation
- rotating shaft
- mounting portion
- core
- end ring
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- Iron Core Of Rotating Electric Machines (AREA)
Abstract
本实用新型公开一种电机，电机包括转子组件，转子组件包括转轴、转子芯体及端环，转轴穿设于转子芯体，端环沿转轴的轴向设于转子芯体的两端，转轴内形成腔体，转轴开设有散热孔，散热孔连通腔体；且散热件包括多个叶片，散热孔、腔体及多个叶片形成散热通道。通过将散热件套设在转子芯体的两端，以保持散热件和转子芯体间的稳定连接，同时通过散热孔、腔体及多个叶片形成的散热通道可以对端环和转子芯体进行散热；散热件的整体结构简单，也使得转子组件在转轴的轴向上的长度处于可控范围，以控制电机的生产成本。
The utility model discloses a motor, which includes a rotor assembly, which includes a rotating shaft, a rotor core and an end ring. The rotating shaft is passed through the rotor core, and the end rings are arranged at both ends of the rotor core along the axial direction of the rotating shaft. A cavity is formed in the rotating shaft, and a heat dissipation hole is opened in the rotating shaft, and the heat dissipation hole is connected to the cavity; and the heat dissipation element includes a plurality of blades, and the heat dissipation hole, the cavity and the plurality of blades form a heat dissipation channel. The heat dissipation element is sleeved on both ends of the rotor core to maintain a stable connection between the heat dissipation element and the rotor core, and the heat dissipation channel formed by the heat dissipation hole, the cavity and the plurality of blades can dissipate heat for the end ring and the rotor core; the overall structure of the heat dissipation element is simple, and the length of the rotor assembly in the axial direction of the rotating shaft is within a controllable range, so as to control the production cost of the motor.
Description
[ Field of technology ]
The utility model relates to the technical field of motors, in particular to a motor.
[ Background Art ]
The motor is used as an electromagnetic device for realizing electric energy conversion or transmission, and has been widely applied to various fields of industrial industry, and in the application process, the rotor of the motor can generate a large amount of heat in the rotation process, and if the heat is not timely emitted, the work of the motor can be influenced.
Based on the above-mentioned problems, a scheme of adding a fan and a fan cover at the end of the motor to air-cool the rotor is proposed in the related art, but the axial length of the motor is increased, which is not beneficial to the overall axial dimension control and increases the production cost.
[ utility model ]
The utility model mainly aims to provide a motor, which aims to keep stable connection between a heat dissipation piece and a rotor core body by arranging the heat dissipation piece, and simultaneously can dissipate heat of an end ring and the rotor core body through a heat dissipation channel formed by a heat dissipation hole, a cavity and a plurality of blades.
In order to achieve the above purpose, the present utility model provides a motor, which comprises a rotor assembly, wherein the rotor assembly comprises a rotating shaft, a rotor core body and end rings, the rotating shaft penetrates through the rotor core body, the end rings are arranged at two ends of the rotor core body along the axial direction of the rotating shaft, a cavity is formed in the rotating shaft, the rotating shaft is provided with a heat dissipation hole, and the heat dissipation hole is communicated with the cavity;
The rotor assembly further comprises a heat dissipation piece, the heat dissipation piece is sleeved at two ends of the rotor core body along the axial direction, the heat dissipation piece comprises a plurality of blades, and the heat dissipation holes, the cavity and the blades form heat dissipation channels.
In an embodiment of the utility model, the heat dissipation element includes a first installation portion and a second installation portion, the first installation portion is sleeved on the end ring, and the second installation portion is sleeved on the periphery of the rotating shaft;
the two ends of the blades are respectively connected with the first installation part and the second installation part, and are arranged at intervals around the circumference of the rotor core body.
In an embodiment of the present utility model, two ends of the shaft along an axial direction of the shaft are respectively provided with a plurality of first heat dissipation holes and a plurality of second heat dissipation holes, wherein the plurality of first heat dissipation holes are arranged at intervals along a circumferential direction of the shaft, and the plurality of second heat dissipation holes are arranged at intervals along the circumferential direction of the shaft.
In an embodiment of the utility model, the second mounting portion is provided with a hollowed portion, and the first heat dissipation hole and/or the second heat dissipation hole are/is located in the hollowed portion.
In an embodiment of the present utility model, the blade includes a first fin and a second fin, where a plurality of the first fins are connected to the first mounting portion, a first gap is formed between two adjacent first fins, a plurality of ventilation holes are arranged on the first mounting portion at intervals around a circumferential direction of the rotating shaft, and a first heat dissipation channel is formed by the plurality of first gaps and the plurality of ventilation holes;
The second fins are connected with the second installation part, a second gap is formed between two adjacent second fins, and the second gaps, the heat dissipation holes and the cavity form a second heat dissipation channel.
In an embodiment of the present utility model, a distance between the first fin and the rotor core along an axial direction of the rotating shaft is greater than a distance between the second fin and the rotor core along the axial direction of the rotating shaft.
In an embodiment of the present utility model, the heat sink further includes a partition portion, the plurality of first fins connect the first mounting portion and the partition portion, and the second fins connect the partition portion and the second mounting portion;
the separation part is abutted against one surface of the end ring, which is far away from the first mounting part.
In an embodiment of the utility model, the heat dissipation member further includes a plurality of limiting back-ups, the plurality of limiting back-ups are disposed on the second installation portion and are disposed around the circumference of the rotating shaft at intervals, and the plurality of limiting back-ups are detachably connected with the rotating shaft.
In an embodiment of the utility model, the rotor core comprises a first core body and a second core body, wherein the second core body is arranged at two ends of the first core body along the axial direction of the rotating shaft and forms a mounting groove, and the end ring is arranged on the second core body;
The outer diameter of the first core body is larger than that of the second core body, the outer diameter of the end ring is the same as that of the second core body, and the outer diameter of the first mounting part is the same as that of the first core body.
In an embodiment of the utility model, the end ring is made of cast aluminum alloy.
By adopting the technical scheme, the heat dissipation part comprises a plurality of blades, the rotating shaft is provided with the heat dissipation holes, the heat dissipation holes are communicated with the cavity inside the rotating shaft, so that heat exchange can be carried out on the rotating shaft and the end ring to reduce the temperature of the rotating shaft and the end ring, meanwhile, the heat dissipation part is sleeved at two ends of the rotor core body along the axial direction of the rotating shaft and plays a role in limiting the end ring, so that the connection between the end ring and the rotor core body is more stable, the heat dissipation part is of an integral structure and is directly sleeved at two ends of the rotor core body, the length of the rotor core body in the axial direction of the rotating shaft is in a controllable range, and the sizes of other parts in the motor are not required to be changed, so that the production cost is reduced.
[ Description of the drawings ]
In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is an overall structure diagram of a heat dissipation element according to an embodiment of the present utility model;
FIG. 2 is an overall view of a heat sink according to another embodiment of the present utility model;
FIG. 3 is an overall block diagram of a rotor assembly provided in an embodiment of the present utility model;
FIG. 4 is a cross-sectional view of a rotor assembly provided by an embodiment of the present utility model;
FIG. 5 is a perspective cross-sectional view of a rotor assembly provided in an embodiment of the present utility model;
fig. 6 is an enlarged view of a portion of a rotor assembly provided in an embodiment of the present utility model.
Reference numerals illustrate:
| Reference numerals | Name of the name | Reference numerals | Name of the name |
| 100 | Rotor assembly | 10 | Rotor core |
| 11 | First core body | 13 | Second core body |
| 15 | Mounting groove | 30 | Rotating shaft |
| 31 | Cavity body | 33 | First heat dissipation hole |
| 35 | Second heat dissipation hole | 50 | End ring |
| 70 | Heat dissipation piece | 71 | A first mounting part |
| 711 | Vent hole | 73 | A second mounting part |
| 731 | Hollowed-out part | 733 | Limiting back-off |
| 75 | First fin | 751 | First gap |
| 77 | Second fin | 771 | Second gap |
| 79 | Partition part | 200 | First heat dissipation channel |
| 300 | Second heat dissipation channel |
[ Detailed description ] of the invention
For a better understanding of the technical solution of the present utility model, the following detailed description of the embodiments of the present utility model refers to the accompanying drawings. It should be understood that the described embodiments are merely some, but not all, embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
The terminology used in the embodiments of the utility model is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. As used in this application and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
It should be understood that the term "and/or" as used herein is merely an association relationship describing the associated object, and means that there may be three relationships, e.g., a and/or B, and that there may be three cases where a exists alone, while a and B exist together, and B exists alone. In addition, the character "/" herein generally indicates that the front and rear associated objects are an "or" relationship.
The utility model provides a motor, which comprises a stator assembly and a rotor assembly 100, wherein the stator assembly is arranged on a machine shell, a coil is wound on a stator core, the rotor assembly 100 is arranged and fixed on a machine base through a bearing or a shaft sleeve, and the stator assembly and the rotor assembly 100 are not directly connected but separated through an air gap, so that the rotor assembly 100 can freely rotate in the stator assembly.
The motor comprises a rotor assembly 100, wherein the rotor assembly 100 comprises a rotating shaft 30, a rotor core 10 and an end ring 50, the rotating shaft 30 penetrates through the rotor core 10, the end ring 50 is arranged at two ends of the rotor core 10 along the axial direction of the rotating shaft 30, a cavity 31 is formed in the rotating shaft 30, the rotating shaft 30 is provided with a heat dissipation hole, the heat dissipation hole is communicated with the cavity 31, the rotor assembly 100 further comprises a heat dissipation piece 70, the heat dissipation piece 70 is sleeved at two ends of the rotor core 10 along the axial direction, and the heat dissipation piece 70 comprises a plurality of blades, and the heat dissipation hole, the cavity 31 and the blades form a heat dissipation channel.
The motor can be an induction motor, and the working principle of the induction motor is that a three-phase alternating current power supply is connected through a connecting terminal on a stator assembly to supply current to a stator winding, when the current passes through the stator winding, a magnetic field is generated in a stator iron core, the magnetic field rotates along with the change of the current to form a rotating magnetic field, a rotor winding can be embedded on a rotor core body 10, when the rotating magnetic field acts on a rotor assembly 100, the rotor winding cuts a magnetic induction wire to generate induction electromotive force and induction current in the rotor winding, and when the induction current is generated, the current in the rotor winding interacts with the rotating magnetic field to generate electromagnetic force, and the electromagnetic force enables the rotor assembly 100 to start rotating, so that the conversion from electric energy to mechanical energy is realized.
Because the rotor assembly 100 rotates at a high speed, it is prone to high temperatures during rotation, and the end plates are prone to deformation, fracture and high temperature creep at high temperatures. In order to solve this problem, a method of providing a fan and a fan cover at the end plate is adopted in the related art to dissipate heat from the end plate, but the overall axial length of the rotor assembly 100 is increased by adopting the heat dissipation method, and accordingly, the size of the stator assembly needs to be adaptively changed, so that the overall volume of the motor needs to be changed, and the production cost is increased.
The utility model also provides a heat dissipation member 70, wherein the heat dissipation member 70 comprises a plurality of blades, the rotating shaft 30 is provided with heat dissipation holes, the heat dissipation holes are communicated with the cavity 31 inside the rotating shaft 30, so that heat exchange can be performed on the rotating shaft 30 and the end ring 50 to reduce the temperature of the rotating shaft 30 and the end ring 50, meanwhile, the heat dissipation member 70 is sleeved at two ends of the rotor core 10 along the axial direction of the rotating shaft 30 to limit the end ring 50, so that the connection between the end ring 50 and the rotor core 10 is more stable, the heat dissipation member 70 is as an integral structure and is directly sleeved at two ends of the rotor core 10, the length of the rotor core 10 in the axial direction of the rotating shaft 30 is in a controllable range, and the sizes of other components in the motor are not required to be changed, so that the production cost is reduced.
It is known that the rotor core is a part of a main magnetic circuit of a motor for embedding rotor windings and constructing a magnetic circuit to ensure that a magnetic field can be smoothly transferred inside the motor, and is generally laminated of silicon steel sheets, to reduce core loss generated in a rotating magnetic field, both sides of which are coated with an insulating paint to ensure insulation between the sheets, the rotary shaft 30 is a rotary shaft 30 for connecting a load and outputting power, and converting electric energy into mechanical energy and transferring it to the load for operation, the end ring 50 is for protecting parts inside the motor from external environments such as dust, moisture, corrosion, physical damage, etc., thereby extending the service life of the motor, and at the same time, the end ring 50 provides a supporting and fixing function to the rotary shaft 30 to maintain a certain gap between the stator assembly and the rotor assembly 100 to ensure stable operation thereof.
Fig. 1 is an overall structure diagram of a heat sink provided by an embodiment of the present utility model, fig. 2 is an overall structure diagram of another angle of the heat sink provided by an embodiment of the present utility model, fig. 3 is an overall structure diagram of a rotor assembly provided by an embodiment of the present utility model, fig. 4 is a cross-sectional view of the rotor assembly provided by an embodiment of the present utility model, fig. 5 is a perspective cross-sectional view of the rotor assembly provided by an embodiment of the present utility model, and fig. 6 is a partial enlarged view of the rotor assembly provided by an embodiment of the present utility model.
Referring to fig. 1 to 6, in an embodiment of the present utility model, a specific structure of the heat sink 70 will be described. The heat sink 70 is divided into a first mounting portion 71 and a second mounting portion 73, and the plurality of blades may be connected to the two mounting portions by plugging, bonding or other detachable connection, however, the first mounting portion 71, the second mounting portion 73 and the plurality of blades may be integrally formed, which is not limited herein. The first mounting part 71 is sleeved at the end ring 50 to support and limit the end ring 50, and the second mounting part 73 is sleeved at the rotating shaft 30 and is connected with the first mounting part 71, which is equivalent to connecting the rotating shaft 30 and the end ring 50, so that the two parts have stable connection relation.
In this embodiment, the heat dissipation element 70 may be in a cylindrical shape, and its shape is adapted to the shape of the end ring 50 and the rotating shaft 30, so that when the heat dissipation element 70 is installed on the end ring 50 and the rotating shaft 30, the problem of stress concentration at the installation site can be avoided. The heat sink 70 may be made of polyvinyl chloride, silicone rubber, or other non-magnetic, heat-resistant and flexible polymer, but is not limited thereto. The material density and weight are small, and the overall effect on the rotor assembly 100 is small.
The plurality of blades are spaced around the circumference of the rotor core 10, so that the plurality of blades can increase a contact area with air at both ends of the rotor assembly 100 when the rotor assembly 100 rotates at a high speed, on one hand, accelerate the air flow at the outer circumference of the end ring 50 to lower the temperature of the end ring 50, and on the other hand, the agitated air enters into the cavity 31 of the rotating shaft 30 through the heat dissipation holes to lower the temperature of the rotating shaft 30.
Referring to fig. 1, 2, 5 and 6, in an embodiment of the present utility model, in order to improve the heat dissipation efficiency of the rotating shaft 30, the second mounting portion 73 is provided with a hollow portion 731, and the heat dissipation hole is completely exposed to the hollow portion 731, so that the heat dissipation hole has the highest heat exchange efficiency with the outside. The number of the heat dissipation holes may be one or more, and is not limited herein.
It is known that the number of the end rings 50 is two, so the number of the heat dissipation members 70 is also two, and thus the first heat dissipation holes 33 and the second heat dissipation holes 35 are respectively provided at both sides of the rotating shaft 30 along the axial direction thereof, and in order to further improve the heat dissipation efficiency of the rotating shaft 30, the number of the first heat dissipation holes 33 and the second heat dissipation holes 35 is plural, the plural first heat dissipation holes 33 are disposed at intervals along the circumferential direction of the rotating shaft 30, and the plural second heat dissipation holes 35 are disposed at intervals along the circumferential direction of the rotating shaft 30.
The second mounting portion 73 is also provided with a plurality of hollow portions 731 corresponding to the plurality of first heat dissipation holes 33 and the plurality of second heat dissipation holes 35, and the setting positions of each first heat dissipation hole 33 and each second heat dissipation hole 35 are referred to above, which will not be described in detail herein.
Referring to fig. 1 to 6, in an embodiment of the present utility model, in order to further improve the heat dissipation efficiency to the end ring 50 and the rotating shaft 30, the blades are provided as first fins 75 and second fins 77, the plurality of first fins 75 are used to increase the air contact area with the end ring 50, and the plurality of second fins 77 are used to increase the air contact area with the rotating shaft 30.
The plurality of first fins 75 are connected to the first mounting portion 71, a first gap 751 is formed between two adjacent first fins 75, and heat exchange is performed between the generated hot air at the end ring 50 and the outside between the plurality of first gaps 751, so that the end ring 50 is cooled, and is not deformed due to excessively high temperature during operation, so that the working state and efficiency of the rotor assembly 100 and the motor are affected. Still further, the first mounting portion 71 is provided with a plurality of ventilation holes 711 at intervals around the circumferential direction of the rotary shaft 30, so that the heat radiation efficiency to the end ring 50 can be still further improved, and the plurality of first clearances 751 and the plurality of ventilation holes 711 form the first heat radiation passage 200.
Similarly, the plurality of second fins 77 are connected to the second mounting portion 73, a second gap 771 is formed between two adjacent second fins 77, and the plurality of second gaps 771, the heat dissipation holes, and the cavity 31 form the second heat dissipation channel 300. The structure and function of the plurality of second fins 77 and the plurality of second gaps 771 may refer to the plurality of first fins 75 and the plurality of second gaps 771, and the plurality of second fins 77 may be disposed obliquely.
It will be appreciated that the plurality of first fins 75 dissipate heat from the end ring 50, and the plurality of second fins 77 dissipate heat from the rotating shaft 30, and the arrangement of the first fins 75 and the second fins 77 for the end ring 50 and the rotating shaft 30, respectively, may further improve the heat dissipation efficiency of the heat dissipation element 70 for both, as compared to the arrangement of a vane for simultaneously dissipating heat from the end ring 50 and the rotating shaft 30.
Referring to fig. 1 to 6, further, in an embodiment of the present utility model, the distance between the first fin 75 and the rotor core 10 along the axial direction of the rotation shaft 30 is greater than the distance between the second fin 77 and the rotor core 10 along the axial direction of the rotation shaft 30.
In the present embodiment, the axial direction of the rotating shaft 30 can be understood as the length direction of the rotating shaft 30, which is related to the structure to be heat-dissipated corresponding to the first fins 75 and the second fins 77, and the distance between the first fins 75 and the rotor core 10 is greater than the distance between the second fins 77 and the rotor core 10 in the direction in which the end ring 50 is further away from the rotor core 10 in the length direction of the rotating shaft 30.
The arrangement is to meet the requirement that the first fins 75 and the second fins 77 respectively dissipate heat from the end ring 50 and the rotating shaft 30, and meanwhile, the air flow directions at the first fins 75 and the second fins 77 can not influence each other, so that the heat dissipation efficiency of the heat dissipation element 70 on the end ring 50 and the rotating shaft 30 is further improved.
Referring to fig. 1 to 6, in an embodiment of the present utility model, the heat sink 70 further includes a partition 79, the plurality of first fins 75 connect the first mounting portion 71 and the partition 79, the second fins 77 connect the partition 79 and the second mounting portion 73, and the partition 79 abuts against a surface of the end ring 50 remote from the first mounting portion 71.
In this embodiment, the partition 79 connects the first fin 75 and the second fin 77 together, providing them with a firm support. This helps to ensure stability of the entire heat sink 70 during rotation, and simultaneously the heat dissipation channels may be divided into the first heat dissipation channel 200 and the second heat dissipation channel 300, so that the two heat dissipation channels may operate independently, without interfering with each other, thereby improving heat dissipation efficiency of the end ring 50 and the rotating shaft 30.
Of course, the separation portion 79 and other components of the heat dissipation element 70 may be integrally formed, and may be detachably connected in other manners, which are not limited herein.
In the related art, the contact between the end ring 50 and the guide bars requires the centrifugal force generated from the end ring 50 to be received at the contact portion by the centrifugal force, so that the problem of stress concentration occurs at the contact portion of the two. By encasing heat sink 70 around end ring 50, centrifugal force generated by end ring 50 may be shared to heat sink 70 as rotor assembly 100 rotates, thereby reducing stress at the contact between the conductors and end ring 50 and reducing stress concentrations.
By providing spacer 79 abutting against a face of end ring 50 remote from first mounting portion 71, end ring 50 is restrained in cooperation with first mounting portion 71, thereby preventing end ring 50 from having a tendency to move radially toward rotor core 10, to maintain connection stability of end ring 50 with rotor core 10.
In order to further improve the connection stability between the end ring 50 and the rotor core 10, the heat dissipating member 70 is further provided with a plurality of limiting back-ups 733, and the plurality of limiting back-ups 733 are disposed on the second mounting portion 73 and are circumferentially spaced around the rotating shaft 30, and the plurality of limiting back-ups 733 are all detachable to connect the rotating shaft 30.
The outer circumference of the rotating shaft 30 may be correspondingly provided with a limiting groove to be clamped with the limiting back-off 733, so as to enhance the connection stability between the second mounting portion 73 and the rotating shaft 30, and the inner and outer sides of the end plate are supported and limited by the first mounting portion 71 and the partition portion 79 and finally connected with the rotating shaft 30 through the second fin 77, so that the connection stability between the end ring 50 and the rotor core 10 is further enhanced.
Referring to fig. 4 to 6, in an embodiment of the present utility model, a rotor core 10 includes a first core 11 and a second core 13, the second core 13 is disposed at both ends of the first core 11 along an axial direction of a rotation shaft 30, and forms a mounting groove 15, an end ring 50 is disposed on the second core 13, a first mounting portion 71 is sleeved on an outer circumference of the second core 13, an outer diameter of the first core 11 is greater than an outer diameter of the second core 13, an outer diameter of the end ring 50 is the same as an outer diameter of the second core 13, and an outer diameter of the first mounting portion 71 is the same as an outer diameter of the first core 11.
In this embodiment, the mounting groove 15 is used for mounting the first mounting portion 71, and the first mounting portion 71 abuts against the groove wall of the mounting groove 15, so that the heat dissipation element 70 and the rotor core 10 can be stably connected in this connection manner, so that loosening or displacement caused by vibration or movement is reduced, and meanwhile, the mounting of a user is facilitated.
The rotor core 10 includes a first core 11 and a second core 13, the first core 11 serving as a main portion for supporting the second core 13, and the first core 11 and the second core 13 having different diameters, thereby forming the above-mentioned mounting groove 15 for mounting the heat sink 70.
The outer diameter of the second core 13 is the same as the outer diameter of the end ring 50, and the outer diameter of the first core 11 is the same as the outer diameter of the first mounting portion 71, so that the rotor assembly 100 is entirely on the same plane in the radial direction, and the dimension thereof is in a controllable range in the axial direction, so that the rotor assembly 100 added with the heat dissipation member 70 can be matched with the original stator assembly without increasing the dimension of the whole motor, thereby reducing the production cost.
Finally, it should be noted that the above embodiments are only for illustrating the technical solution of the present utility model, and are not limiting. Although the utility model has been described in detail with reference to the foregoing embodiments, it will be appreciated by those skilled in the art that variations may be made to the embodiments described, or equivalents may be substituted for elements thereof in part or in whole. Such modifications and substitutions do not depart from the spirit of the utility model.
Claims (10)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202421326699.6U CN222868629U (en) | 2024-06-12 | 2024-06-12 | Motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202421326699.6U CN222868629U (en) | 2024-06-12 | 2024-06-12 | Motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN222868629U true CN222868629U (en) | 2025-05-13 |
Family
ID=95610797
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202421326699.6U Active CN222868629U (en) | 2024-06-12 | 2024-06-12 | Motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN222868629U (en) |
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2024
- 2024-06-12 CN CN202421326699.6U patent/CN222868629U/en active Active
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