CN113691077A - Multi-path star-delta automatic conversion three-phase asynchronous motor and use method thereof - Google Patents

Multi-path star-delta automatic conversion three-phase asynchronous motor and use method thereof Download PDF

Info

Publication number
CN113691077A
CN113691077A CN202110775731.3A CN202110775731A CN113691077A CN 113691077 A CN113691077 A CN 113691077A CN 202110775731 A CN202110775731 A CN 202110775731A CN 113691077 A CN113691077 A CN 113691077A
Authority
CN
China
Prior art keywords
asynchronous motor
plate
phase asynchronous
motor body
rod
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
CN202110775731.3A
Other languages
Chinese (zh)
Inventor
李香珍
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to CN202110775731.3A priority Critical patent/CN113691077A/en
Publication of CN113691077A publication Critical patent/CN113691077A/en
Withdrawn legal-status Critical Current

Links

Images

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K9/00—Arrangements for cooling or ventilating
    • H02K9/02—Arrangements for cooling or ventilating by ambient air flowing through the machine
    • H02K9/04—Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium
    • H02K9/06—Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium with fans or impellers driven by the machine shaft
    • 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
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K17/00—Asynchronous induction motors; Asynchronous induction generators
    • H02K17/02—Asynchronous induction motors
    • H02K17/12—Asynchronous induction motors for multi-phase current
    • H02K17/14—Asynchronous induction motors for multi-phase current having windings arranged for permitting pole-changing
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K3/00—Details of windings
    • H02K3/04—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors
    • H02K3/28—Layout of windings or of connections between windings
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
    • H02K5/10—Casings or enclosures characterised by the shape, form or construction thereof with arrangements for protection from ingress, e.g. water or fingers
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
    • H02K5/18—Casings or enclosures characterised by the shape, form or construction thereof with ribs or fins for improving heat transfer
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
    • H02K5/20—Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium
    • H02K5/207—Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium with openings in the casing specially adapted for ambient air
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
    • H02K5/22—Auxiliary parts of casings not covered by groups H02K5/06-H02K5/20, e.g. shaped to form connection boxes or terminal boxes
    • H02K5/225—Terminal boxes or connection arrangements
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/24—Casings; Enclosures; Supports specially adapted for suppression or reduction of noise or vibrations
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/26—Means for adjusting casings relative to their supports
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K2201/00—Specific aspects not provided for in the other groups of this subclass relating to the magnetic circuits
    • H02K2201/03—Machines characterised by aspects of the air-gap between rotor and stator

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Motor Or Generator Cooling System (AREA)

Abstract

The invention discloses a multi-path star-delta automatic conversion three-phase asynchronous motor and a using method thereof. According to the invention, through the arrangement of the air gap and the lifting rod, when an operator needs to enlarge the air gap, the operator can drive the movable sleeve to move by screwing the adjusting knob, and the movable sleeve can drive the lifting rod to move up and down due to the fact that the connecting rod is arranged on the surface of the movable sleeve, so that the rotor core is driven to move, and the size of the air gap can be adjusted due to the fact that the stator winding is arranged at the bottom of the rotor core.

Description

Multi-path star-delta automatic conversion three-phase asynchronous motor and use method thereof
Technical Field
The invention relates to the technical field of three-phase asynchronous motors, in particular to a multi-path star-delta automatic conversion three-phase asynchronous motor and a using method thereof.
Background
The three-phase asynchronous motor as motor operation has rotor with rotation speed lower than that of rotating magnetic field, rotor winding moving relatively to the magnetic field to produce electromotive force and current, and electromagnetic torque produced by interaction with the magnetic field to realize energy conversion. The rotor and stator of a wound three-phase asynchronous motor are also provided with three-phase windings and are connected with external varistors through slip rings and brushes. Adjusting the varistor resistance may improve the starting performance of the motor and adjust the speed of the motor.
The existing multipath star-delta automatic switching three-phase asynchronous motor and the using method thereof have the defects that:
1. the reference CN112564444A discloses a three-phase asynchronous motor structure, which includes a socket, a motor back cover assembly, a shell back cover assembly, a belleville spring, a first bearing, a second bearing, a shell assembly, a rotor assembly, and a front cover assembly. The three-phase asynchronous motor structure can meet the requirements of a motor for braking, cooling and driving an airplane wheel, and the invention realizes 500W of output power, 900VA of input power and 55% of energy conversion efficiency by designing the structure of a stator and a rotor of the motor, greatly improves the onboard energy conversion efficiency, and has high processing precision and mechanical strength of the motor, but the air gap of the device is small, the whole device is difficult to adjust, the overall energy loss of the three-phase asynchronous motor is large, the working efficiency is low, high temperature is easy to generate, and noise is easy to produce;
2. a reference CN211046631U discloses a three-phase asynchronous motor, which comprises a motor, a shell and a dustproof cover, wherein the outer surface of the motor is provided with the shell, one side of the shell is provided with a vent, one side of the motor, which is close to the vent, is sleeved with the dustproof cover, two sides of the motor are respectively and fixedly provided with a connecting block, one side of the connecting block is provided with a slot, one side of the connecting block, which is internally located in the slot, is provided with a groove, the inside of the groove is provided with a movable plate, one side of the movable plate is fixedly provided with a limit pin, one side of the dustproof cover is fixedly provided with an inserted bar, and the surface of the inserted bar is provided with a limit groove. The utility model discloses a through being equipped with the shield, when the motor is out of work, the shield can cover the vent to prevent that outside a large amount of dust from entering into the motor, avoid influencing the life of motor ", but the device does not set up the protective structure to winding among the three-phase asynchronous motor, because the component of motor during winding, the winding is hurt all to its winding of being affected with damp, being heated, the impact of external force, and then shorten its life;
3. the comparison document CN208353135U discloses an electromagnetic braking three-phase asynchronous motor with a damping function, which comprises a first damping mechanism, wherein a three-phase asynchronous motor body is fixedly connected to the top of the first damping mechanism, and second damping mechanisms are arranged at the joints of the two sides of the bottom of the three-phase asynchronous motor body and the first damping mechanism. The utility model discloses a first damper, the movable box, first damping spring, the elastic plate, the slide bar, the sliding sleeve, second damper, the shock-absorbing rod, the limiting plate, the spout, second damping spring, surge tank and three-phase asynchronous motor body mutually support, can play absorbing effect to the three-phase asynchronous motor body, avoided current three-phase asynchronous motor when using, three-phase asynchronous motor does not possess absorbing function, thereby lead to the not good situation of three-phase asynchronous motor operation effect, but the device does not set up quick installation and fixed knot to construct, and holistic height is difficult to adjust, make it have the limitation when in-service use.
Disclosure of Invention
The invention aims to provide a multi-path star-delta automatic conversion three-phase asynchronous motor and a using method thereof, so as to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: the multi-path star-delta automatic conversion three-phase asynchronous motor comprises a three-phase asynchronous motor body, a fixing plate and a supporting plate, wherein a stator winding is arranged on one side inside the three-phase asynchronous motor body, a rotor core is arranged at the top of the stator winding, an air gap is reserved between the stator winding and the rotor core, a rotor winding is arranged inside the three-phase asynchronous motor body and located below the stator winding, a transmission shaft is arranged inside the rotor winding, bearing seats are arranged on the surface of the transmission shaft, and the surfaces of the two ends of the transmission shaft are connected with the three-phase asynchronous motor body through the bearing seats in a penetrating mode.
Preferably, the internally mounted of three-phase asynchronous motor body has the division board, the inside one side of three-phase asynchronous motor body is provided with the heat dissipation fan, and the inside middle part through connection of heat dissipation fan has the transmission shaft, and the heat dissipation fan is located one side of rotor winding, the top on three-phase asynchronous motor body surface is provided with adjust knob, adjust knob's figure is two, adjust knob's surperficial threaded connection has movable sleeve, movable sleeve's surface mounting has the linking pole, the lifting rod is installed to the bottom on linking pole surface, and the lifting rod is located the both sides at rotor core top respectively.
Preferably, a wire box is installed on one side of the surface of the three-phase asynchronous motor body, a connecting wire is arranged inside the wire box, a connecting clamping plate is installed at the bottom of the three-phase asynchronous motor body, and a connecting hole is formed in the middle of the surface of the connecting clamping plate.
Preferably, the bottom on the surface of the connecting clamping plate is spliced with a fixed plate through a connecting clamping groove, the size of the connecting clamping plate is matched with the connecting clamping groove, the connecting groove is formed in the inner side wall of the connecting clamping groove, the surface of the fixed plate is provided with a lifting circular plate, the middle of the bottom of the lifting circular plate is provided with a movable rod, a transmission rod is installed on the top end of the movable rod, a return spring is arranged on the surface of the transmission rod in a winding mode, a bearing plate is installed on the top end of the transmission rod, a limiting insertion rod is installed on the surface of the bearing plate, the size of the limiting insertion rod is matched with the connecting hole and the connecting groove, a damping spring is installed on the inner side wall of the connecting clamping groove, and the top of the damping spring is provided with a pressing plate.
Preferably, the spacing groove has all been seted up to the both sides at fixed plate top, the limiting plate has been cup jointed to the inside of spacing groove, the mount is installed at the top of limiting plate, the both sides on mount surface all are provided with the vent, the inside of vent is provided with the filter screen, the ventilation groove has been seted up at the top of mount, the interior diapire in ventilation groove has seted up the ventilation strip, the inside wall in ventilation groove is connected with the switch cover through the pivot, the middle part of switch cover bottom is provided with sealed the pad, the mid-mounting at switch cover top has the handle, the both sides at mount back all are provided with the ventilating fan, there is the shield on the surface of mount through hinge connection, and the shield is located the top of ventilating fan, the movable groove has been seted up at the middle part at shield cover top, the internally mounted in movable groove has the handle.
Preferably, the four corners of the bottom of the fixing plate are in threaded connection with a fixing plate, the bottom of the fixing plate is provided with a supporting rod, the bottom end of the surface of the supporting rod is inserted with a fixing sleeve, the bottom of the fixing sleeve is provided with a supporting plate, and the intersection of the supporting rod and the fixing sleeve is in threaded connection with a fixing knob.
Preferably, the connecting pieces are installed on the periphery of the supporting plate, and the connecting pieces are connected with fixing bolts through threads inside.
Preferably, the top of fixed plate has seted up out the air duct, the inside of fixed plate is provided with the condensing panel, the inside of air duct is provided with the dust screen, and the dust screen is located the top of condensing panel.
A multipath star-delta automatic switching three-phase asynchronous motor and a using method thereof are disclosed, the device comprises the following steps:
s1, according to any one of claims 1 to 8, when an operator needs to enlarge an air gap, the adjusting knob can be rotated, because the number of the adjusting knobs is two and the adjusting knobs are respectively positioned at two sides of the surface of the three-phase asynchronous motor body, the surface of the adjusting knob is in threaded connection with a movable sleeve, the operator can drive the movable sleeve to move by screwing the adjusting knob, because the surface of the movable sleeve is provided with an engaging rod, the bottom of the surface of the engaging rod is provided with a lifting rod which is respectively positioned at two sides of the top of a rotor core, the movable sleeve can drive the lifting disc to move up and down, so as to drive the rotor core to move, because the bottom of the rotor core is provided with a stator winding, the size of the air gap can be adjusted, and the increase of the energy loss of the three-phase asynchronous motor body due to the undersized air gap is avoided, the working efficiency of the three-phase asynchronous motor body is reduced;
s2, according to any one of claims 1 to 8, when workers need to protect the winding, after the three-phase asynchronous motor body is fixed, the limiting plate can be inserted into the limiting groove by the workers due to the fact that the limiting groove is matched with the limiting plate, the fixing frame is installed at the top of the limiting plate, ventilation openings are formed in two sides of the surface of the fixing frame, filter screens are arranged inside the ventilation openings, ventilation grooves are formed in the top of the fixing frame, ventilation strips are formed in the inner bottom wall of the ventilation grooves, the inner side wall of each ventilation groove is connected with a switch cover through a rotating shaft, ventilation fans are arranged on two sides of the back of the fixing frame, dust covers are connected to the surface of the fixing frame through hinges, the switch covers can be opened by the workers firstly, the ventilation fans, the ventilation strips and the ventilation openings are matched for use, air in the fixing frame can keep good fluidity, and the dust covers, the filter screens and the switch covers are matched for use, the worker can prevent dust in the air from falling into the three-phase asynchronous motor body by closing the switch cover and the dustproof cover, thereby causing damage to electronic elements in the three-phase asynchronous motor body, the inner bottom wall of the fixing plate is provided with the air outlet groove, the inside of the air outlet groove is provided with the condensing plate, after the external power supply is connected, the condensing plate can transmit cold air generated by the work of the worker to the surface of the three-phase asynchronous motor body through the air outlet groove, thereby dissipating heat to the three-phase asynchronous motor body, the worker can form a rotating magnetic field after electrifying the three-phase asynchronous motor body, a rotor conductor carrying current generates electromagnetic force under the action of the rotating magnetic field of the stator to drive the motor to rotate, the transmission shaft is arranged in the rotor winding, the surface of the transmission shaft penetrates through the heat dissipating fan, the transmission shaft drives the heat dissipating fan to rotate, thereby dissipating heat to the inside of the three-phase asynchronous motor body, the windings in the three-phase asynchronous motor body can be protected, and the service life of the three-phase asynchronous motor body is prevented from being shortened due to external reasons;
s3, according to any one of claims 1 to 8, when an operator needs to quickly install the three-phase asynchronous motor body, because the connecting clamping plate is matched with the connecting clamping groove, the surface of the fixing plate is provided with a lifting circular plate, the middle part of the bottom of the lifting circular plate is provided with a movable rod, the top end of the movable rod is provided with a transmission rod, the surface of the transmission rod is wound with a return spring, the top end of the transmission rod is provided with a bearing plate, the surface of the bearing plate is provided with a limiting insertion rod, the size of the limiting insertion rod is matched with the connecting hole and the connecting groove, the operator can pull the lifting circular plate backwards to drive the movable rod and the transmission rod to extrude the return spring backwards, after the connecting clamping plate is inserted into the connecting clamping groove, the return spring can push the limiting insertion rod to move forwards according to the elasticity of the return spring and penetrate through the limiting hole to the connecting groove, so that the limiting is completed, and because the inner side wall of the connecting clamping groove is provided with a damping spring, the top of the damping spring is provided with a pressing plate, the connecting clamping plate can press the pressing plate towards two sides after being inserted into the limiting clamping groove, and the damping spring can drive the pressing plate to be tightly attached to the surface of the limiting clamping plate according to the elasticity of the damping spring, so that the damping spring can offset the vibration generated when the three-phase asynchronous motor body works, and then the damping spring has a buffering effect;
s4, according to any claim of claims 1 to 8, when the staff need adjust the height of three-phase asynchronous motor body, can unscrew fixed knob earlier, because of the fixed plate is installed to the bottom of three-phase asynchronous motor body, the stationary blade is installed to the four corners department of fixed plate, the bracing piece is installed to the bottom of stationary blade, the bottom on bracing piece surface is pegged graft and is had fixed sleeve, the backup pad is installed to fixed sleeve's bottom, thereby make the staff accessible bracing piece stretch out the length adjustment fixed plate place the height, fixed knob fixes, and then make the device's whole height be convenient for adjust.
Compared with the prior art, the invention has the beneficial effects that:
1. according to the invention, through the arrangement of the air gap and the lifting rod, when an operator needs to expand the air gap, the adjusting knob can be rotated, the surface of the adjusting knob is in threaded connection with the movable sleeve, so that the operator can drive the movable sleeve to move by screwing the adjusting knob, the surface of the movable sleeve is provided with the connecting rod, the bottom of the surface of the connecting rod is provided with the lifting rod, and the lifting rods are respectively positioned at two sides of the top of the rotor core, so that the movable sleeve can drive the lifting rod to move up and down, and the rotor core is driven to move.
2. Through the arrangement of the ventilating fan, the condensing plate and the heat dissipation fan, when workers need to protect the winding, the workers can insert the limiting plate into the limiting groove and then open the switch cover, the ventilating fan, the ventilating strip and the ventilating opening are matched for use, so that the air in the fixing frame can keep good fluidity, the dustproof cover, the filter screen and the switch cover are matched for use, the workers can prevent dust in the air from falling into the three-phase asynchronous motor body by closing the switch cover and the dustproof cover, thereby causing damage to electronic elements in the three-phase asynchronous motor body, the inner bottom wall of the fixing plate is provided with the air outlet groove, the condensing plate is arranged in the air outlet groove, thereby dissipating heat of the three-phase asynchronous motor body, the workers form a rotating magnetic field after electrifying the three-phase asynchronous motor body, and the transmission shaft is arranged in the rotor winding, the surface of transmission shaft runs through there is the heat dissipation fan, and the transmission shaft drives the heat dissipation fan and rotates to can dispel the heat to three-phase asynchronous motor body inside, and then solved and be difficult to carry out the problem of protection for the winding.
3. According to the invention, through the arrangement of the connecting clamping plate, the connecting clamping groove and the lifting circular plate, when a worker needs to rapidly install the three-phase asynchronous motor body, the worker can pull the lifting circular plate backwards due to the matching of the connecting clamping plate and the connecting clamping groove to drive the movable rod and the transmission rod to extrude the return spring backwards, after the connecting clamping plate is inserted into the connecting clamping groove, the return spring can push the limiting insertion rod to move forwards according to the elasticity of the return spring and penetrate through the limiting hole to the connecting groove, so that the limiting is completed, and the damping spring is arranged on the inner side wall of the connecting clamping groove, so that the connecting clamping plate can press the pressing plate towards two sides after being inserted into the limiting clamping groove, so that the damping spring can counteract the vibration generated when the three-phase asynchronous motor body works, and the problem of difficult rapid installation is solved.
4. According to the invention, through the arrangement of the fixing sleeve and the supporting rod, when a worker needs to adjust the height of the three-phase asynchronous motor body, the fixing knob can be firstly unscrewed, the supporting rod is installed on the fixing plate at the bottom of the three-phase asynchronous motor body through the fixing piece, and the fixing sleeve is inserted into the bottom end of the surface of the supporting rod, so that the worker can adjust the placing height of the fixing plate through the extending length of the supporting rod, the fixing knob is fixed, the integral height of the device is convenient to adjust, and the problem that the height is difficult to adjust is solved.
Drawings
Fig. 1 is a schematic sectional three-dimensional structure of a three-phase asynchronous motor body according to the present invention;
FIG. 2 is a schematic structural diagram of a three-phase asynchronous motor body according to the present invention;
FIG. 3 is a schematic view of the fixing frame of the present invention;
FIG. 4 is a schematic view of a dust cap according to the present invention;
FIG. 5 is a schematic view of the structure of the support plate of the present invention;
FIG. 6 is a schematic cross-sectional view of a fixing plate according to the present invention;
FIG. 7 is a schematic cross-sectional view of an adjustment knob according to the present invention;
fig. 8 is a schematic cross-sectional view of a fixing plate according to the present invention.
In the figure: 1. a three-phase asynchronous motor body; 2. a fixing plate; 3. a support plate; 4. a stator winding; 5. a rotor core; 6. an air gap; 7. a rotor winding; 8. a drive shaft; 9. a bearing seat; 10. a partition plate; 11. a heat dissipation fan; 12. adjusting a knob; 13. a movable sleeve; 14. a connecting rod; 15. lifting a pull rod; 16. a wire box; 17. connecting a clamping plate; 18. a connecting clamping groove; 19. lifting the circular plate; 20. a transmission rod; 21. a return spring; 22. a pressure bearing plate; 23. a limiting inserted rod; 24. a damping spring; 25. a pressing plate; 26. a limiting groove; 27. a limiting plate; 28. a fixed mount; 29. a vent; 30. a filter screen; 31. a ventilation strip; 32. a switch cover; 33. a gasket; 34. a handle; 35. a ventilating fan; 36. a dust cover; 37. a fixing sheet; 38. a support bar; 39. fixing the sleeve; 40. fixing the knob; 41. connecting sheets; 42. a handle; 43. an air outlet groove; 44. a cold plate.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-8, an embodiment of the present invention: a multi-path star-delta automatic conversion three-phase asynchronous motor and a using method thereof comprise a three-phase asynchronous motor body 1, a fixing plate 2 and a supporting plate 3, wherein a stator winding 4 is arranged on one side inside the three-phase asynchronous motor body 1, a rotor core 5 is arranged on the top of the stator winding 4, an air gap 6 is reserved between the stator winding 4 and the rotor core 5, a rotor winding 7 is arranged inside the three-phase asynchronous motor body 1, the rotor winding 7 is positioned below the stator winding 4, a transmission shaft 8 is arranged inside the rotor winding 7, a bearing seat 9 is arranged on the surface of the transmission shaft 8, the surfaces of two ends of the transmission shaft 8 are respectively connected with the three-phase asynchronous motor body 1 in a penetrating way through the bearing seat 9, a partition plate 10 is arranged inside the three-phase asynchronous motor body 1, a heat dissipation fan 11 is arranged on one side inside the three-phase asynchronous motor body 1, and the transmission shaft 8 is connected in a penetrating way through the middle inside the heat dissipation fan 11, the heat dissipation fan 11 is positioned at one side of the rotor winding 7, the top of the surface of the three-phase asynchronous motor body 1 is provided with two adjusting knobs 12, the number of the adjusting knobs 12 is two, the surface of the adjusting knobs 12 is in threaded connection with movable sleeves 13, the surface of the movable sleeves 13 is provided with connecting rods 14, the bottom of the surface of the connecting rods 14 is provided with lifting rods 15, the lifting rods 15 are respectively positioned at two sides of the top of the rotor core 5, one side of the surface of the three-phase asynchronous motor body 1 is provided with a wire box 16, connecting wires are arranged inside the wire box 16, the bottom of the three-phase asynchronous motor body 1 is provided with a connecting clamp plate 17, the middle part of the surface of the connecting clamp plate 17 is provided with a connecting hole, the bottom of the surface of the connecting clamp plate 17 is inserted with a fixing plate 2 through a connecting clamping groove 18, the size of the connecting clamp plate 17 is matched with the connecting clamping groove 18, and the inner side wall of the connecting clamping groove 18 is provided with a connecting groove, a lifting circular plate 19 is arranged on the surface of the fixed plate 2, a movable rod is arranged in the middle of the bottom of the lifting circular plate 19, a transmission rod 20 is arranged at the top end of the movable rod, a return spring 21 is wound on the surface of the transmission rod 20, a bearing plate 22 is arranged at the top end of the transmission rod 20, a limiting inserted rod 23 is arranged on the surface of the bearing plate 22, the size of the limiting inserted rod 23 is matched with that of a connecting hole and a connecting groove, a damping spring 24 is arranged on the inner side wall of the connecting clamping groove 18, a pressing plate 25 is arranged at the top of the damping spring 24, limiting grooves 26 are formed in both sides of the top of the fixed plate 2, a limiting plate 27 is sleeved in the limiting grooves 26, a fixed frame 28 is arranged at the top of the limiting plate 27, vent holes 29 are formed in both sides of the surface of the fixed frame 28, a filter screen 30 is arranged in the vent holes 29, vent grooves are formed in the top of the fixed frame 28, and vent strips 31 are formed in the inner bottom walls of the vent grooves, the inner side wall of the ventilation groove is connected with a switch cover 32 through a rotating shaft, the middle part of the bottom of the switch cover 32 is provided with a sealing gasket 33, the middle part of the top of the switch cover 32 is provided with a handle 34, both sides of the back of the fixed frame 28 are provided with ventilation fans 35, the surface of the fixed frame 28 is connected with a dust cover 36 through hinges, the dust cover 36 is positioned above the ventilation fans 35, the middle part of the top of the dust cover 36 is provided with a movable groove, the inside of the movable groove is provided with a handle 42, four corners of the bottom of the fixed plate 2 are in threaded connection with fixed plates 37, the bottom of the fixed plates 37 is provided with a support rod 38, the bottom of the surface of the support rod 38 is inserted with a fixed sleeve 39, the bottom of the fixed sleeve 39 is provided with a support plate 3, the intersection of the support rod 38 and the fixed sleeve 39 is in threaded connection with a fixed knob 40, connecting pieces 41 are arranged at the periphery of the support plate 3, and fixing bolts are in threaded connection with the inside of the connecting pieces 41, the air outlet groove 43 has been seted up at the top of fixed plate 2, and the inside of fixed plate is provided with condensing panel 44, and the inside of air outlet groove 43 is provided with the dust screen, and the dust screen is located the top of condensing panel 44.
The working principle is as follows:
s1, when an operator needs to enlarge the air gap 6, the adjusting knob 12 can be rotated, the number of the adjusting knobs 12 is two and the adjusting knobs are respectively positioned on two sides of the surface of the three-phase asynchronous motor body 1, the surface of the adjusting knob 12 is in threaded connection with the movable sleeve 13, the operator can drive the movable sleeve 13 to move by screwing the adjusting knob 12, the surface of the movable sleeve 13 is provided with the connecting rod 14, the bottom of the surface of the connecting rod 14 is provided with the lifting rod 15, the lifting rod 15 is respectively positioned on two sides of the top of the rotor core 5, the movable sleeve 13 can drive the lifting rod 15 to move up and down, so as to drive the rotor core 5 to move, the bottom of the rotor core 5 is provided with the stator winding 4, so that the size of the air gap 6 can be adjusted, and the phenomenon that the energy loss of the three-phase asynchronous motor body 1 is excessively reduced due to the air gap 6 is avoided, the working efficiency of the three-phase asynchronous motor body 1 is reduced;
s2, when a worker needs to protect a winding, the three-phase asynchronous motor body 1 is fixed, the limiting groove 26 is matched with the limiting plate 27, so that the worker can insert the limiting plate 27 into the limiting groove 26, the fixing frame 28 is installed at the top of the limiting plate 27, the ventilation openings 29 are formed in the two sides of the surface of the fixing frame 28, the filter screen 30 is arranged inside the ventilation openings 29, the ventilation groove is formed in the top of the fixing frame 28, the ventilation strip 31 is formed in the inner bottom wall of the ventilation groove, the inner side wall of the ventilation groove is connected with the switch cover 32 through the rotating shaft, the ventilation fans 35 are arranged on the two sides of the back of the fixing frame 28, the dust cover 36 is connected to the surface of the fixing frame 28 through hinges, so that the worker can open the switch cover 32 first, the ventilation fans 35, the ventilation strip 31 and the ventilation openings 29 are matched for use, and the air in the fixing frame 28 can keep good fluidity, the dust cover 36, the filter screen 30 and the switch cover 32 are used in combination, a worker can prevent dust in the air from falling into the three-phase asynchronous motor body 1 by closing the switch cover 32 and the dust cover 36, thereby causing damage to electronic components inside the three-phase asynchronous motor body, the air outlet groove is formed in the inner bottom wall of the fixing plate 2, the condensing plate 44 is arranged inside the air outlet groove, after the external power supply is connected, the condensing plate 44 can transmit cold air generated by the work of the worker to the surface of the three-phase asynchronous motor body 1 through the air outlet groove, thereby dissipating heat of the three-phase asynchronous motor body 1, the worker can form a rotating magnetic field after electrifying the three-phase asynchronous motor body 1, a current-carrying rotor conductor can generate electromagnetic force to drive the motor to rotate under the action of the stator rotating magnetic field, the transmission shaft 8 is arranged inside the rotor winding 7, and the heat dissipating fan 11 penetrates through the surface of the transmission shaft 8, the transmission shaft 8 drives the heat dissipation fan 11 to rotate, so that heat can be dissipated inside the three-phase asynchronous motor body 1, a winding in the three-phase asynchronous motor body 1 can be protected, and the service life of the three-phase asynchronous motor is prevented from being shortened due to external reasons;
s3, when an operator needs to quickly install the three-phase asynchronous motor body 1, because the connecting clamping plate 17 is matched with the connecting clamping groove 18, the surface of the fixing plate 2 is provided with a lifting circular plate 19, the middle part of the bottom of the lifting circular plate 19 is provided with a movable rod, the top end of the movable rod is provided with a transmission rod 20, the surface of the transmission rod 20 is wound with a return spring 21, the top end of the transmission rod 20 is provided with a bearing plate 22, the surface of the bearing plate 22 is provided with a limiting inserted rod 23, the size of the limiting inserted rod 23 is matched with the connecting hole and the connecting groove, the operator can pull the lifting circular plate 19 backwards to drive the movable rod and the transmission rod 20 to extrude the return spring 21 backwards, after the connecting clamping plate 17 is inserted into the connecting clamping groove 18, the return spring 21 can push the limiting inserted rod 23 to move forwards according to the elasticity of the operator and penetrate through the limiting hole to the connecting groove, so that the limiting is completed, and because the inner side wall of the connecting clamping groove 18 is provided with a damping spring 24, the top of the damping spring 24 is provided with a pressing plate 25, the connecting clamping plate 17 can press the pressing plate 25 towards two sides after being inserted into the connecting clamping groove 18, and the damping spring 24 can drive the pressing plate 25 to be tightly attached to the surface of the connecting clamping plate 17 according to the elasticity of the damping spring 24, so that the damping spring 24 can offset the vibration generated when the three-phase asynchronous motor body 1 works, and further play a role in buffering;
s4 when the staff need adjust three-phase asynchronous motor body 1's height, can unscrew fixed knob 40 earlier, install fixed plate 2 because of three-phase asynchronous motor body 1's bottom, stationary blade 37 is installed to the four corners department of fixed plate 2, bracing piece 38 is installed to the bottom of stationary blade 37, the bottom on bracing piece 38 surface is pegged graft and is had fixed sleeve 39, backup pad 3 is installed to fixed sleeve 39's bottom, thereby make the height of placing of the extension length regulation fixed plate of staff's accessible bracing piece 38, fixed knob fixes, and then make the device's whole highly be convenient for adjust.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims (9)

1. A multipath star-delta automatic conversion three-phase asynchronous motor and a using method thereof comprise a three-phase asynchronous motor body (1), a fixing plate (2) and a supporting plate (3), and are characterized in that: the motor is characterized in that a stator winding (4) is arranged on one side of the interior of the three-phase asynchronous motor body (1), a rotor core (5) is arranged at the top of the stator winding (4), an air gap (6) is reserved between the stator winding (4) and the rotor core (5), a rotor winding (7) is arranged inside the three-phase asynchronous motor body (1), the rotor winding (7) is located below the stator winding (4), a transmission shaft (8) is arranged inside the rotor winding (7), a bearing seat (9) is arranged on the surface of the transmission shaft (8), and the surfaces of the two ends of the transmission shaft (8) are all connected with the three-phase asynchronous motor body (1) in a penetrating mode through the bearing seat (9).
2. The multi-path star-delta automatic switching three-phase asynchronous motor and the using method thereof according to claim 1, characterized in that: the internally mounted of three-phase asynchronous motor body (1) has division board (10), the inside one side of three-phase asynchronous motor body (1) is provided with heat dissipation fan (11), and the inside middle part through connection of heat dissipation fan (11) has transmission shaft (8), and heat dissipation fan (11) are located one side of rotor winding (7), the top on three-phase asynchronous motor body (1) surface is provided with adjust knob (12), the figure of adjust knob (12) is two, the surface thread connection of adjust knob (12) has movable sleeve (13), the surface mounting of movable sleeve (13) has linking pole (14), lifting rod (15) are installed to the bottom on linking pole (14) surface, and lifting rod (15) are located the both sides at rotor core (5) top respectively.
3. The multi-path star-delta automatic switching three-phase asynchronous motor and the using method thereof according to claim 1, characterized in that: wire box (16) are installed to one side on three-phase asynchronous motor body (1) surface, the inside of wire box (16) is provided with connecting wire, connection cardboard (17) are installed to the bottom of three-phase asynchronous motor body (1), and the connecting hole has been seted up at the middle part on connection cardboard (17) surface.
4. The multi-path star-delta automatic switching three-phase asynchronous motor and the using method thereof according to claim 3, characterized in that: the bottom of the surface of the connecting clamping plate (17) is inserted with a fixed plate (2) through a connecting clamping groove (18), the size of the connecting clamping plate (17) is matched with that of the connecting clamping groove (18), the inner side wall of the connecting clamping groove (18) is provided with a connecting groove, a lifting circular plate (19) is arranged on the surface of the fixed plate (2), a movable rod is arranged in the middle of the bottom of the lifting circular plate (19), a transmission rod (20) is arranged at the top end of the movable rod, a return spring (21) is wound on the surface of the transmission rod (20), a bearing plate (22) is arranged at the top end of the transmission rod (20), a limiting inserted rod (23) is arranged on the surface of the bearing plate (22), the size and the connecting hole of spacing inserted bar (23) and connecting groove looks adaptation, damping spring (24) are installed to the inside wall of connecting slot (18), damping spring's (24) top is provided with according to pressing plate (25).
5. The multi-path star-delta automatic switching three-phase asynchronous motor and the using method thereof according to claim 4, characterized in that: limiting grooves (26) are formed in the two sides of the top of the fixing plate (2), a limiting plate (27) is sleeved in the limiting groove (26), a fixing frame (28) is installed at the top of the limiting plate (27), ventilation openings (29) are formed in the two sides of the surface of the fixing frame (28), a filter screen (30) is arranged in the ventilation openings (29), a ventilation groove is formed in the top of the fixing frame (28), ventilation strips (31) are formed in the inner bottom wall of the ventilation groove, the inner side wall of the ventilation groove is connected with a switch cover (32) through a rotating shaft, a sealing gasket (33) is arranged in the middle of the bottom of the switch cover (32), a handle (34) is installed in the middle of the top of the switch cover (32), ventilation fans (35) are arranged on the two sides of the back of the fixing frame (28), and a dust cover (36) is connected to the surface of the fixing frame (28) through a hinge, and the dust cover (36) is positioned above the ventilating fan (35), a movable groove is formed in the middle of the top of the dust cover (36), and a lifting handle (42) is arranged inside the movable groove.
6. The multi-path star-delta automatic switching three-phase asynchronous motor and the using method thereof according to claim 1, characterized in that: the fixed plate is characterized in that a fixing plate (37) is connected to the four corners of the bottom of the fixed plate (2) in a threaded mode, a supporting rod (38) is installed at the bottom of the fixing plate (37), a fixing sleeve (39) is inserted into the bottom end of the surface of the supporting rod (38), a supporting plate (3) is installed at the bottom of the fixing sleeve (39), and a fixing knob (40) is connected to the intersection of the supporting rod (38) and the fixing sleeve (39) in a threaded mode.
7. The multi-path star-delta automatic switching three-phase asynchronous motor and the using method thereof according to claim 6, characterized in that: connecting pieces (41) are installed on the periphery of the supporting plate (3), and fixing bolts are connected to the inner threads of the connecting pieces (41).
8. The multi-path star-delta automatic switching three-phase asynchronous motor and the using method thereof according to claim 1, characterized in that: the air outlet groove (43) has been seted up at the top of fixed plate (2), the inside of fixed plate is provided with condenser plate (44), the inside of air outlet groove (43) is provided with the dust screen, and the dust screen is located the top of condenser plate (44).
9. A multi-way star-delta automatic switching three-phase asynchronous motor and its use method according to claims 1-8, characterized in that the device is published as follows:
s1, according to any one of claims 1 to 8, when an operator needs to enlarge the air gap (6), the adjusting knob (12) can be rotated, because the number of the adjusting knob (12) is two and the adjusting knob is respectively located on two sides of the surface of the three-phase asynchronous motor body (1), the surface of the adjusting knob (12) is in threaded connection with the movable sleeve (13), the operator can drive the movable sleeve (13) to move by screwing the adjusting knob (12), because the surface of the movable sleeve (13) is provided with the connecting rod (14), the bottom of the surface of the connecting rod (14) is provided with the lifting rod (15), and the lifting rod (15) is respectively located on two sides of the top of the rotor core (5), the movable sleeve (13) can drive the lifting rod (15) to move up and down, the rotor core (5) is driven to move, because the bottom of the rotor core (5) is provided with the stator winding (4), the size of the air gap (6) can be adjusted, the increase of the miscellaneous energy loss of the three-phase asynchronous motor body (1) caused by the undersize of the air gap (6) is avoided, and the working efficiency of the three-phase asynchronous motor body (1) is reduced;
s2, according to any one of claims 1 to 8, when workers need to protect a winding, the three-phase asynchronous motor body (1) is fixed, the limiting plate (27) can be inserted into the limiting groove (26) by the workers due to the fact that the limiting groove (26) is matched with the limiting plate (27), the fixing frame (28) is installed at the top of the limiting plate (27), vent holes (29) are formed in two sides of the surface of the fixing frame (28), a filter screen (30) is arranged inside the vent holes (29), a ventilation groove is formed in the top of the fixing frame (28), a ventilation strip (31) is formed in the inner bottom wall of the ventilation groove, a switch cover (32) is connected to the inner side wall of the ventilation groove through a rotating shaft, ventilation fans (35) are arranged on two sides of the back of the fixing frame (28), a dust cover (36) is connected to the surface of the fixing frame (28) through a hinge, and the workers can open the switch cover (32) firstly, the matching use of the ventilating fan (35), the ventilating strip (31) and the ventilating opening (29) can ensure that the air in the fixing frame (28) keeps good fluidity, the dust cover (36), the filter screen (30) and the switch cover (32) are matched for use, a worker can prevent dust in the air from falling into the three-phase asynchronous motor body (1) by closing the switch cover (32) and the dust cover (36), thereby causing damage to electronic elements in the air, an air outlet groove is formed in the inner bottom wall of the fixing plate (2), a condensing plate (44) is arranged in the air outlet groove, after the external power supply is connected, the condensing plate (44) can transmit cold air generated by the work of the worker to the surface of the three-phase asynchronous motor body (1) through the air outlet groove, thereby dissipating heat of the three-phase asynchronous motor body (1), and after the worker powers on the three-phase asynchronous motor body (1), a rotating magnetic field is formed, a current-carrying rotor conductor generates electromagnetic force to drive the motor to rotate under the action of the stator rotating magnetic field, and a transmission shaft (8) is arranged in a rotor winding (7), a heat dissipation fan (11) penetrates through the surface of the transmission shaft (8), and the transmission shaft (8) drives the heat dissipation fan (11) to rotate, so that the heat dissipation can be performed in the three-phase asynchronous motor body (1), the winding in the three-phase asynchronous motor body (1) can be protected, and the service life of the motor is prevented from being shortened due to external reasons;
s3, according to any one of claims 1 to 8, when an operator needs to quickly install the three-phase asynchronous motor body (1), because the connecting clamping plate (17) is matched with the connecting clamping groove (18), the surface of the fixing plate (2) is provided with a lifting circular plate (19), the middle part of the bottom of the lifting circular plate (19) is provided with a movable rod, the top end of the movable rod is provided with a transmission rod (20), the surface of the transmission rod (20) is wound with a return spring (21), the top end of the transmission rod (20) is provided with a bearing plate (22), the surface of the bearing plate (22) is provided with a limiting inserted rod (23), the size of the limiting inserted rod (23) is matched with the connecting hole and the connecting groove, the operator can pull the lifting circular plate (19) backwards to drive the movable rod and the transmission rod (20) to extrude the return spring (21) backwards, and after the connecting clamping plate (17) is inserted into the connecting clamping groove (18), the return spring (21) can push the limiting insertion rod (23) to move forwards according to the elasticity of the spring and penetrate through the limiting hole to the connecting groove, so that the limiting is completed, the damping spring (24) is arranged on the inner side wall of the connecting clamping groove (18), the pressing plate (25) is installed at the top of the damping spring (24), the connecting clamping plate (17) can press the pressing plate (25) towards two sides after being inserted into the connecting clamping groove (18), the damping spring (24) can drive the pressing plate (25) to be tightly attached to the surface of the connecting clamping plate (17) according to the elasticity of the spring, so that the damping spring (24) can offset the vibration generated when the three-phase asynchronous motor body (1) works, and then the buffering effect is achieved;
s4, according to any claim of claims 1 to 8, when the staff need adjust the height of three-phase asynchronous motor body (1), can unscrew fixed knob (40) earlier, fixed plate (2) are installed because of the bottom of three-phase asynchronous motor body (1), stationary blade (37) are installed to the four corners department of fixed plate (2), bracing piece (38) are installed to the bottom of stationary blade (37), the bottom on bracing piece (38) surface is pegged graft and is had fixed sleeve (39), backup pad (3) are installed to the bottom of fixed sleeve (39), thereby make the staff accessible bracing piece (38) stretch out the length adjustment fixed plate place the height, fixed knob is fixed, and then make the whole height of the device be convenient for adjust.
CN202110775731.3A 2021-07-08 2021-07-08 Multi-path star-delta automatic conversion three-phase asynchronous motor and use method thereof Withdrawn CN113691077A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202110775731.3A CN113691077A (en) 2021-07-08 2021-07-08 Multi-path star-delta automatic conversion three-phase asynchronous motor and use method thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202110775731.3A CN113691077A (en) 2021-07-08 2021-07-08 Multi-path star-delta automatic conversion three-phase asynchronous motor and use method thereof

Publications (1)

Publication Number Publication Date
CN113691077A true CN113691077A (en) 2021-11-23

Family

ID=78576871

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202110775731.3A Withdrawn CN113691077A (en) 2021-07-08 2021-07-08 Multi-path star-delta automatic conversion three-phase asynchronous motor and use method thereof

Country Status (1)

Country Link
CN (1) CN113691077A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114268176A (en) * 2021-12-28 2022-04-01 嘉兴南洋职业技术学院 Switched reluctance motor and use method thereof
CN114421699A (en) * 2022-01-18 2022-04-29 嘉兴学院 Permanent magnet synchronous motor with protection structure
CN116566106A (en) * 2023-05-09 2023-08-08 无锡港大电机有限公司 Composite dust explosion-proof three-phase asynchronous motor

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114268176A (en) * 2021-12-28 2022-04-01 嘉兴南洋职业技术学院 Switched reluctance motor and use method thereof
CN114421699A (en) * 2022-01-18 2022-04-29 嘉兴学院 Permanent magnet synchronous motor with protection structure
CN116566106A (en) * 2023-05-09 2023-08-08 无锡港大电机有限公司 Composite dust explosion-proof three-phase asynchronous motor
CN116566106B (en) * 2023-05-09 2024-02-20 无锡港大电机有限公司 Composite dust explosion-proof three-phase asynchronous motor

Similar Documents

Publication Publication Date Title
CN113691077A (en) Multi-path star-delta automatic conversion three-phase asynchronous motor and use method thereof
WO2018191990A1 (en) High-efficiency explosion-proof three-phase asynchronous motor
CN210838508U (en) Electrical cabinet with heat dissipation and dehumidification functions
CN207664779U (en) A kind of electric machine radiator
CN211046488U (en) Wall-mounted reactive power compensation device convenient to install
CN209419526U (en) A kind of protection mounting structure of frequency converter
CN214256035U (en) Motor easy to radiate heat
CN216554228U (en) Heat dissipation device of wind generating set
CN211405708U (en) Novel power motor for mechatronics
CN208316495U (en) A kind of integrated form brushless motor with reduction gearbox
CN113783204A (en) Power quality comprehensive compensation device for power distribution network
CN112350487A (en) Cooling and noise reducing structure of three-phase asynchronous motor
CN217656518U (en) Tool for restraining motor current from damaging bearing
CN218161328U (en) Power distribution control box convenient for wiring
CN215185354U (en) High-voltage circuit breaker protective equipment based on electric power internet
CN115514131A (en) New forms of energy shaded pole motor
CN218678723U (en) Motor with high heat-dissipating ability
CN220874335U (en) Three-phase multi-speed motor
CN219659537U (en) Multi-mode motor capable of adjusting magnetic circuit characteristics
CN215120407U (en) Double-speed motor capable of reducing noise
CN212163989U (en) Mounting bracket for high-frequency inverter
CN219918604U (en) AC motor with stepless speed regulating control circuit
CN212231246U (en) Motor protection device
CN213844954U (en) Dry-type transformer for hydropower station
CN217115798U (en) Dust-proof housing of direct current motor module

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
WW01 Invention patent application withdrawn after publication

Application publication date: 20211123

WW01 Invention patent application withdrawn after publication