CN218124497U - Power storage device and motor - Google Patents
Power storage device and motor Download PDFInfo
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- CN218124497U CN218124497U CN202221566013.1U CN202221566013U CN218124497U CN 218124497 U CN218124497 U CN 218124497U CN 202221566013 U CN202221566013 U CN 202221566013U CN 218124497 U CN218124497 U CN 218124497U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/16—Mechanical energy storage, e.g. flywheels or pressurised fluids
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Abstract
The invention relates to the technical field of driving and power storage, in particular to a power storage device and a motor, which comprise a stator assembly, a rotor assembly, a fixed element, an end cover and a power storage element, wherein the stator assembly is fixed on the fixed element, the rotor assembly is matched with the stator assembly and is rotatably connected with the fixed element, the end cover is connected with the rotor assembly and can rotate along with the rotor assembly, the fixed element is provided with a cavity, the end cover is rotatably connected with the fixed element and is provided with a positioning groove corresponding to the cavity, a limiting tooth is arranged in the positioning groove, the power storage element is arranged in the cavity and is provided with a first connecting end and a second connecting end, the first connecting end is connected with the fixed element, and the second connecting end extends to the positioning groove and is limited by the limiting tooth. The invention can be used for limiting through matching the force storage element with the limiting teeth, can limit through the limiting surface in forward rotation, and can guide to rotate through the guide surface in reverse rotation, thereby ensuring the normal rotation of the structure and the used force storage.
Description
Technical Field
The invention relates to the technical field of driving and power storage, in particular to a power storage device and a motor.
Background
At present, with the continuous development of motor technology, the direct drive motor is more and more widely applied. The direct drive motor can output power according to motion parameters required by equipment under the control of a system, including position precision, rotation speed, acceleration, torque and the like, so that all transmission parts from the motor to a final output shaft are omitted after the equipment is provided with the motor, the structure is simplified to the greatest extent, and the performance is improved.
Most of the existing direct-drive motors only have independent output capacity, and do not have a power storage function in use, so that the load of the motor can be increased in some scenes needing power storage driving; if the output load of the motor is different when the robot is driven by standing action and squatting action, the structure of the existing direct drive motor can be improved.
Disclosure of Invention
In order to solve the problems, the invention provides the power storage device and the motor, wherein the power storage element is matched with the limiting teeth to be used for limiting, the limiting surface is used for limiting in forward rotation, and the guide surface is used for guiding rotation in reverse rotation, so that the normal rotation of the structure and the used power storage are ensured.
The technical scheme adopted by the invention is as follows: a power storage device comprises a fixed element, an end cover and a power storage element, wherein the fixed element is provided with a cavity, the end cover is rotatably connected to the fixed element and is provided with a positioning groove corresponding to the cavity, a limiting tooth is arranged in the positioning groove, the power storage element is arranged in the cavity and is provided with a first connecting end and a second connecting end, the first connecting end is connected to the fixed element, and the second connecting end extends to the positioning groove and is limited through the limiting tooth.
The scheme is further improved in that a rotary connecting column is arranged in the middle in the cavity, the fixed element is provided with a fixed structure, and the fixed structure is communicated to the cavity; the end cover is rotatably connected to the rotating connecting column, and the first connecting end is connected to the fixing structure.
The scheme is further improved in that the positioning groove is an annular positioning groove, and limiting teeth are uniformly distributed in the positioning groove in the circumferential direction; the limiting teeth are provided with guide surfaces and limiting surfaces, the guide surfaces are inclined planes, and the limiting surfaces are planes.
The further improvement of the scheme is that the fixed element comprises an inner shaft body and an outer sleeve sleeved on the outer diameter of the inner shaft body, the rotating connecting column is integrally processed and formed on the inner shaft body, and the cavity is formed in the outer sleeve and is located on the outer edge of the rotating connecting column; the fixing structure is a fixing clamping groove which is formed in the outer sleeve and close to the inner shaft body, and the first connecting end is clamped into the fixing clamping groove; the outer sleeve is provided with a wiring groove, the wiring groove penetrates through the outer sleeve, a through hole penetrates through the center of the inner shaft body, the through hole is communicated with a through groove, and the through groove is communicated with the wiring groove.
A motor comprises a stator assembly, a rotor assembly, a fixed element, an end cover and a force storage element, wherein the stator assembly is fixed on the fixed element, the rotor assembly is matched with the stator assembly and can be rotatably connected to the fixed element, the end cover is connected to the rotor assembly and can rotate along with the rotor assembly, the fixed element is provided with a cavity, the end cover is rotatably connected to the fixed element and is provided with a positioning groove corresponding to the cavity, a limiting tooth is arranged in the positioning groove, the force storage element is arranged in the cavity and is provided with a first connecting end and a second connecting end, the first connecting end is connected to the fixed element, and the second connecting end extends to the positioning groove and is limited through the limiting tooth.
The scheme is further improved in that a rotary connecting column is arranged in the middle in the cavity, the fixed element is provided with a fixed structure, and the fixed structure is communicated to the cavity; the end cover is rotatably connected to the rotating connection column, and the first connection end is connected to the fixing structure.
The scheme is further improved in that the positioning groove is an annular positioning groove, and limiting teeth are uniformly distributed in the positioning groove in the circumferential direction; the limiting teeth are provided with guide surfaces and limiting surfaces, the guide surfaces are inclined surfaces, and the limiting surfaces are planes.
The fixing element comprises an inner shaft body and an outer sleeve sleeved on the outer diameter of the inner shaft body, the rotating connecting column is integrally processed and formed on the inner shaft body, and the cavity is formed in the outer sleeve and located on the outer edge of the rotating connecting column; the fixing structure is a fixing clamping groove which is formed in the outer sleeve and close to the inner shaft body, and the first connecting end is clamped into the fixing clamping groove; the outer sleeve is provided with a wiring groove, the wiring groove penetrates through the outer sleeve, a through hole penetrates through the center of the inner shaft body, the through hole is communicated with a through groove, and the through groove is communicated with the wiring groove.
The improved structure of the power storage device is characterized in that cavities are formed in two ends of the fixing element, rotating connecting columns are arranged in the cavities at two ends, power storage elements are arranged in the cavities, and the rotating connecting columns are connected with end covers.
The further improvement to above-mentioned scheme does, the swivelling joint post cover is equipped with the bearing, the end cover is equipped with rotatory spread groove, rotatory spread groove cooperates in the bearing, the constant head tank is located the outer edge of rotatory spread groove, spacing tooth integrated into one piece is in the constant head tank.
The beneficial effects of the invention are:
compared with the existing force storage structure, the invention arranges the cavity in the fixed element, arranges the rotary connecting column in the cavity, connects the end cover with the rotary connecting column, seals the cavity, and arranges the force storage element in the cavity, so that in use, the force storage element can be used for limiting by matching with the limiting teeth, the limiting surface can be used for limiting in forward rotation, and the guide surface can be used for guiding and rotating in reverse rotation, thereby ensuring the normal rotation of the structure and the force storage in use. The force storage element is arranged in the cavity and is provided with a first connecting end and a second connecting end, the first connecting end is connected to the fixed element, and the second connecting end extends to the positioning groove and is limited through the limiting teeth. In use, through corotation spacing, normal work can be guaranteed to the principle of reversal direction, and elasticity resets for the torsional spring structure moreover, and spacing and fixed connection are corresponded respectively to cooperation first link and second link, and the structure is reliable.
Compared with the existing motor, the motor with the force storage structure is adopted, the motor is provided with the stator assembly, the rotor assembly, the fixed element, the end cover and the force storage element, the stator assembly is fixed on the fixed element, the rotor assembly is matched with the stator assembly and can be rotatably connected to the fixed element, the end cover is connected to the rotor assembly and can rotate along with the rotor assembly, the fixed element is provided with a cavity, the end cover is rotatably connected to the fixed element and is provided with a positioning groove corresponding to the cavity, limiting teeth are arranged in the positioning groove, the force storage element is arranged in the cavity and is provided with a first connecting end and a second connecting end, the first connecting end is connected to the fixed element, and the second connecting end extends to the positioning groove and is limited through the limiting teeth. Therefore, in use, the rotor assembly is matched with the stator assembly, the force storage element is matched with the limiting teeth to be used for limiting, the limiting surface can be used for limiting in forward rotation, guiding rotation is carried out through the guide surface in reverse rotation, and normal rotation of the structure and force storage in use are guaranteed.
Drawings
FIG. 1 is a perspective view of the motor of the present invention;
FIG. 2 is an exploded view of the motor of FIG. 1;
FIG. 3 is an exploded view of the power storage device of the present invention;
FIG. 4 is a front view of the power storage device of FIG. 3;
FIG. 5 isbase:Sub>A cross-sectional view A-A of FIG. 4;
FIG. 6 is a perspective view of an end cap of the power storage device of FIG. 3.
Description of reference numerals: the power storage device comprises a fixed element 1, a cavity 11, a rotary connecting column 12, a bearing 121, a fixed structure 13, a positioning groove 14, a limiting tooth 141, a guide surface 141a, a limiting surface 141b, an inner shaft body 15, a through hole 151, a through groove 152, an outer sleeve 16, a wiring groove 161, an end cover 2, a rotary connecting groove 21, a power storage element 3, an elastic resetting piece 31, a first connecting end 32, a second connecting end 33, a stator assembly 4, a rotor shell 5 and a rotor element 51.
Detailed Description
To facilitate an understanding of the invention, the invention will now be described more fully hereinafter with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.
As shown in fig. 1 to 6, a power storage device is provided with a fixed element 1, an end cover 2 and a power storage element 3, wherein the fixed element 1 is provided with a cavity 11, the end cover 2 is rotatably connected to the fixed element 1 and is provided with a positioning groove 14 corresponding to the cavity 11, a limiting tooth 141 is arranged in the positioning groove 14, the power storage element 3 is arranged in the cavity 11 and is provided with a first connecting end 32 and a second connecting end 33, the first connecting end 32 is connected to the fixed element 1, and the second connecting end 33 extends to the positioning groove 14 and is limited by the limiting tooth 141.
In another embodiment, a rotation connection column 12 is arranged in the cavity 11 in the middle, the fixing element 1 is provided with a fixing structure 13, and the fixing structure 13 is communicated with the cavity 11; the end cover 2 is rotatably connected to the rotating connecting column 12, the first connecting end 32 is connected to the fixed structure 13, and the further improvement is that the positioning groove 14 is an annular positioning groove 14, and the limiting teeth 141 are circumferentially and uniformly distributed in the positioning groove 14; the limiting teeth 141 are provided with guide surfaces 141a and limiting surfaces 141b, the guide surfaces 141a are inclined surfaces, the limiting surfaces 141b are flat surfaces, a rotating connecting column 12 is arranged in the cavity 11, the rotating connecting column 12 is connected with the end cover 2, the cavity 11 is sealed, and the force storage element 3 is arranged in the cavity, so that in use, the force storage element 3 can be matched with the limiting teeth 141 to limit; and the guide surface 141a and the limit surface 141b are matched to realize the principle of forward rotation limit and reverse rotation guide, so that normal work can be ensured.
In the above further improved embodiment, the fixing element 1 includes an inner shaft 15 and an outer sleeve 16 sleeved on the outer diameter of the inner shaft 15, the rotating connecting column 12 is integrally formed on the inner shaft 15, and the cavity 11 is formed in the outer sleeve 16 and located at the outer edge of the rotating connecting column 12; the fixing structure 13 is a fixing slot formed in the outer sleeve 16 and close to the inner shaft body 15, and the first connection end 32 is clamped into the fixing slot; the outer sleeve 16 is provided with a wiring groove 161, the wiring groove 161 penetrates through the outer sleeve 16, a through hole 151 penetrates through the inner shaft body 15, the through hole 151 is communicated with a through groove 152, and the through groove 152 is communicated with the wiring groove 161; the fixed clamping groove is matched with the first connecting end 32 to be clamped and fixed, so that one end of the force storage element 3 is fixedly connected inside, a torsion effect is generated during rotation, force storage is generated, and a power assisting effect is achieved during rebounding; the wiring groove 161, the through hole 151 and the through groove 152 are arranged to be matched with each other, so that the direction of the connecting wires can be used, and the wiring is convenient.
The cavity 11 is arranged in the fixed element 1, the rotary connecting column 12 is arranged in the cavity 11, the rotary connecting column 12 is connected with the end cover 2, the cavity 11 is sealed, and the power storage element 3 is arranged in the cavity, so that in use, the power storage element 3 can be used for limiting through the matching of the power storage element 3 and the limiting teeth 141, the power storage element can be limited through the limiting surface 141b in forward rotation, and can be guided to rotate through the guide surface 141a in reverse rotation, and the normal rotation and the power storage in use of the structure are ensured. Specifically, a fixing element 1, an end cover 2 and a force storage element 3 are arranged, the fixing element 1 is provided with a cavity 11, the end cover 2 is rotatably connected to the fixing element 1 and is provided with a positioning groove 14 corresponding to the cavity 11, a limiting tooth 141 is arranged in the positioning groove 14, the force storage element 3 is arranged in the cavity 11 and is provided with a first connecting end 32 and a second connecting end 33, the first connecting end 32 is connected to the fixing element 1, and the second connecting end 33 extends to the positioning groove 14 and is limited through the limiting tooth 141. In use, normal work can be guaranteed through the principle of forward rotation limiting and reverse rotation guiding, the elastic reset piece 31 is of a torsion spring structure, the first connecting end 32 and the second connecting end 33 are matched to be correspondingly limited and fixedly connected respectively, and the structure is reliable.
As shown in fig. 1 to 6, a motor is provided with a stator assembly 4, a rotor assembly, a fixing element 1, an end cover 2, and a force storage element 3, wherein the stator assembly 4 is fixed on the fixing element 1, the rotor assembly is fitted to the stator assembly 4 and rotatably connected to the fixing element 1, the end cover 2 is connected to the rotor assembly and can rotate along with the rotor assembly, the fixing element 1 is provided with a cavity 11, the end cover 2 is rotatably connected to the fixing element 1 and is provided with a positioning groove 14 corresponding to the cavity 11, a limit tooth 141 is arranged in the positioning groove 14, the force storage element 3 is arranged in the cavity 11 and is provided with a first connection end 32 and a second connection end 33, the first connection end 32 is connected to the fixing element 1, and the second connection end 33 extends to the positioning groove 14 and is limited by the limit tooth 141.
In another embodiment, a rotation connection column 12 is arranged in the cavity 11 in the middle, the fixing element 1 is provided with a fixing structure 13, and the fixing structure 13 is communicated with the cavity 11; the end cover 2 is rotatably connected to the rotating connection column 12, and the first connection end 32 is connected to the fixed structure 13, further improved in that the positioning groove 14 is an annular positioning groove 14, and the limiting teeth 141 are circumferentially and uniformly distributed in the positioning groove 14; the limiting teeth 141 are provided with guide surfaces 141a and limiting surfaces 141b, the guide surfaces 141a are inclined surfaces, the limiting surfaces 141b are flat surfaces, a rotating connecting column 12 is arranged in the cavity 11, the rotating connecting column 12 is connected with the end cover 2, the cavity 11 is sealed, and the force storage element 3 is arranged in the cavity, so that in use, the force storage element 3 can be matched with the limiting teeth 141 to limit; and the guide surface 141a and the limiting surface 141b are matched to realize the forward rotation limiting and reverse rotation guiding principle, so that the normal work can be ensured.
In the above further improved embodiment, the fixing element 1 includes an inner shaft 15 and an outer sleeve 16 sleeved on the outer diameter of the inner shaft 15, the rotating connection column 12 is integrally formed on the inner shaft 15, and the cavity 11 is formed on the outer sleeve 16 and located at the outer edge of the rotating connection column 12; the fixed structure 13 is a fixed clamping groove formed in the outer sleeve 16 and close to the inner shaft body 15, and the first connecting end 32 is clamped into the fixed clamping groove; a wiring groove 161 is formed in the outer sleeve 16, the wiring groove 161 penetrates through the outer sleeve 16, a through hole 151 penetrates through the inner shaft body 15, the through hole 151 is communicated with a through groove 152, and the through groove 152 is communicated with the wiring groove 161; the fixed clamping groove is matched with the first connecting end 32 to be clamped and fixed, so that one end of the force storage element 3 is fixedly connected inside, a torsion effect is generated during rotation, force storage is generated, and a power assisting effect is achieved during rebounding; the wiring groove 161, the through hole 151 and the through groove 152 are arranged in cooperation, so that the direction of a connecting line can be used, and wiring is convenient.
In the embodiment of the further improvement, the two ends of the fixing element 1 are both provided with the cavities 11, the cavities 11 at the two ends are both provided with the rotating connecting columns 12, the cavities 11 at the two ends are internally provided with the power storage elements 3, the rotating connecting columns 12 are connected with the end covers 2, the two ends are symmetrically arranged, the power storage elements 3, the rotating connecting columns 12 and the end covers 2 are arranged at the two ends, the power storage strength is higher in use, and the stability is better.
In the embodiment of the above further improvement, the rotating connecting column 12 is sleeved with a bearing 121, the end cap 2 is provided with a rotating connecting groove 21, the rotating connecting groove 21 is matched with the bearing 121, the positioning groove 14 is located on the outer edge of the rotating connecting groove 21, the limiting teeth 141 are integrally formed in the positioning groove 14, and the rotating connecting groove 21 is matched with the bearing 121 to facilitate the structure rotation and stabilize the rotation. In addition, the limiting teeth 141 are integrally formed in the positioning groove 14, so that the structure strength is high, the abrasion resistance is high, and the limiting effect is good.
According to the invention, the cavity 11 is arranged in the fixed element 1, the rotating connecting column 12 is arranged in the cavity 11, the rotating connecting column 12 is connected with the end cover 2, the cavity 11 is sealed, and the power storage element 3 is arranged in the cavity, so that in use, the power storage element 3 can be matched with the limiting teeth 141 for limiting through the matching of the rotor assembly and the stator assembly 4, the limiting can be carried out through the limiting surface 141b in forward rotation, and the guide rotation can be carried out through the guide surface 141a in reverse rotation, so that the normal rotation of the structure and the power storage in use are ensured.
The above examples only show some embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that various changes and modifications can be made by those skilled in the art without departing from the spirit of the invention, and these changes and modifications are all within the scope of the invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. A power storage device comprises a fixing element, an end cover and a power storage element, and is characterized in that: the fixed element is provided with a cavity, the end cover is rotatably connected to the fixed element and provided with a positioning groove corresponding to the cavity, a limiting tooth is arranged in the positioning groove, the force storage element is arranged in the cavity and provided with a first connecting end and a second connecting end, the first connecting end is connected to the fixed element, and the second connecting end extends to the positioning groove and is limited through the limiting tooth.
2. A power accumulating device according to claim 1, wherein: a rotary connecting column is arranged in the middle of the cavity, the fixed element is provided with a fixed structure, and the fixed structure is communicated to the cavity; the end cover is rotatably connected to the rotating connecting column, and the first connecting end is connected to the fixing structure.
3. A power accumulating device according to claim 2, wherein: the positioning groove is an annular positioning groove, and limiting teeth are uniformly distributed in the positioning groove in the circumferential direction; the limiting teeth are provided with guide surfaces and limiting surfaces, the guide surfaces are inclined planes, and the limiting surfaces are planes.
4. A power accumulating device according to claim 3, wherein: the fixed element comprises an inner shaft body and an outer sleeve sleeved on the outer diameter of the inner shaft body, the rotating connecting column is integrally processed and formed on the inner shaft body, and the cavity is formed in the outer sleeve and located on the outer edge of the rotating connecting column; the fixing structure is a fixing clamping groove which is formed in the outer sleeve and close to the inner shaft body, and the first connecting end is clamped into the fixing clamping groove; the outer sleeve is provided with a wiring groove, the wiring groove penetrates through the outer sleeve, a through hole penetrates through the center of the inner shaft body, the through hole is communicated with a through groove, and the through groove is communicated with the wiring groove.
5. An electric machine comprising a stator assembly, a rotor assembly, a stationary member, an end cap, and a force accumulating member, the stator assembly being secured to the stationary member, the rotor assembly being fitted to the stator assembly and being rotatably connected to the stationary member, the end cap being connected to the rotor assembly and being capable of rotating with the rotor assembly, the electric machine comprising: the fixed element is provided with a cavity, the end cover is rotatably connected to the fixed element and provided with a positioning groove corresponding to the cavity, a limiting tooth is arranged in the positioning groove, the force storage element is arranged in the cavity and provided with a first connecting end and a second connecting end, the first connecting end is connected to the fixed element, and the second connecting end extends to the positioning groove and is limited through the limiting tooth.
6. The electric machine of claim 5, wherein: a rotary connecting column is arranged in the middle of the cavity, the fixed element is provided with a fixed structure, and the fixed structure is communicated with the cavity; the end cover is rotatably connected to the rotating connecting column, and the first connecting end is connected to the fixing structure.
7. The electric machine of claim 6, wherein: the positioning groove is an annular positioning groove, and limiting teeth are uniformly distributed in the positioning groove in the circumferential direction; the limiting teeth are provided with guide surfaces and limiting surfaces, the guide surfaces are inclined planes, and the limiting surfaces are planes.
8. The electric machine of claim 6, wherein: the fixed element comprises an inner shaft body and an outer sleeve sleeved on the outer diameter of the inner shaft body, the rotating connecting column is integrally processed and formed on the inner shaft body, and the cavity is formed in the outer sleeve and located on the outer edge of the rotating connecting column; the fixing structure is a fixing clamping groove which is formed in the outer sleeve and close to the inner shaft body, and the first connecting end is clamped into the fixing clamping groove; the outer sleeve is provided with a wiring groove, the wiring groove penetrates through the outer sleeve, a through hole penetrates through the center of the inner shaft body, the through hole is communicated with a through groove, and the through groove is communicated with the wiring groove.
9. The electric machine of claim 6, wherein: the two ends of the fixing element are both provided with cavities, the cavities at the two ends are both internally provided with rotating connecting columns, the cavities are internally provided with power storage elements, and the rotating connecting columns are connected with end covers.
10. The electric machine of claim 6, wherein: the swivelling joint post cover is equipped with the bearing, the end cover is equipped with rotatory spread groove, rotatory spread groove cooperates in the bearing, the constant head tank is located the outer edge of rotatory spread groove, spacing tooth integrated into one piece is in the constant head tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221566013.1U CN218124497U (en) | 2022-06-21 | 2022-06-21 | Power storage device and motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221566013.1U CN218124497U (en) | 2022-06-21 | 2022-06-21 | Power storage device and motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218124497U true CN218124497U (en) | 2022-12-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221566013.1U Active CN218124497U (en) | 2022-06-21 | 2022-06-21 | Power storage device and motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218124497U (en) |
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2022
- 2022-06-21 CN CN202221566013.1U patent/CN218124497U/en active Active
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