CN211018551U

CN211018551U - Micro motor

Info

Publication number: CN211018551U
Application number: CN201922433057.1U
Authority: CN
Inventors: 曾子斌
Original assignee: Wenling City Jinmazhi Weite Motor Manufacturing Co ltd
Current assignee: Wenling City Jinmazhi Weite Motor Manufacturing Co ltd
Priority date: 2019-12-30
Filing date: 2019-12-30
Publication date: 2020-07-14
Anticipated expiration: 2029-12-30

Abstract

The utility model provides a micro motor belongs to motor technical field. It has solved the not good problem of fan radiating effect of current motor. This micro motor, the inner of interior casing has the inner baffle, and this inner baffle and the second cooling chamber that forms of the end cover of interior casing, and the outer end of interior casing is provided with end cover, and this end cover and the second assembly chamber that forms the installation control of the end cover of interior casing, is provided with the cold wind passageway that makes cooling chamber, assembly chamber, interior casing intercommunication in the motor, and the one end of motor shaft stretches out end cover one be used for the transmission to connect, and the other end of motor shaft stretches out end cover two and extends to the cooling intracavity, and the other end of the motor shaft that is in the cooling intracavity sets firmly the radiator fan that makes cold wind passageway cold wind. The utility model has the advantages of reasonable design, simply, set up the cold wind passageway in the motor, and the cold wind passageway forced air cooling circulation of flowing when passing through radiator fan, the radiating effect is better, long service life.

Description

Micro motor

Technical Field

The utility model belongs to the technical field of the motor, a micro motor is related to.

Background

The motor is a power device which is widely used in the industrial field, when the motor works, a large amount of heat can be generated in the motor, so that the integral temperature of the motor is greatly increased, the energy consumption of each component of the system is increased, the efficiency is reduced, and even a serious person burns out the motor, so that the heat dissipation of the motor is very important.

In the prior art, a cooling mode is commonly used in which a motor is additionally provided with a heat dissipation fan blade, however, the heat dissipation fan blade is usually fixed on a rotating shaft through a spline or a clamping key, so that the production cost is increased, and the processing and loading/unloading efficiency is slow. For example, Chinese patent numbers are: the wind guide type motor heat dissipation fan blade disclosed by 'CN 203926128U' comprises a rotary disc at the middle part, wherein the rotary disc is fixed on a motor rotating shaft, a circular baffle is arranged in front of the outer part of the rotary disc, a wind outlet blade is arranged between the rotary disc and the circular baffle, the wind outlet blade is fan-shaped and can extend a wind channel in the transverse direction, and a vent is arranged on the circular baffle so that heat can be discharged out of the motor through the vent as soon as possible to play a role in cooling and heat dissipation.

In foretell patent, be equipped with the air-out blade between carousel and circular baffle, this blade is the dull and stereotyped leaf, and the amount of wind that produces is very little, and the radiating effect is relatively poor, for setting up the cold wind passageway on this motor in addition, and this motor heat dissipation is relatively poor, and the control temperature is higher burns out easily, and life is short.

Disclosure of Invention

The utility model aims at the above-mentioned problem that exists among the prior art, provide a simple structure, cold wind circulation radiating effect is better, the longer micro motor of life.

The purpose of the utility model can be realized by the following technical proposal: a miniature motor comprises an outer shell with a first end cover and an inner shell with a second end cover, wherein the inner shell and the outer shell are relatively connected in the same axial direction, a stator, a rotor and a motor shaft are arranged in the inner shell, the rotor and the motor shaft are fixedly matched in the circumferential direction, the stator is fixed on the inner wall of the inner shell and is positioned on the outer side of the rotor and in clearance fit with the rotor, the miniature motor is characterized in that an inner partition plate is arranged at the inner end of the inner shell, a cooling cavity is formed by the inner partition plate and the second end cover of the inner shell, a bottom cover is arranged at the outer end of the inner shell, an assembly cavity for installing a control element is formed by the bottom cover and the second end cover of the inner shell, a cold air channel for communicating the cooling cavity, the assembly cavity and the inner shell is arranged in the motor, one end of the motor shaft extends out of, the other end of the motor shaft in the cooling cavity is fixedly provided with a cooling fan which enables cold air in the cold air channel to flow.

This micro motor is provided with cold wind passageway mainly in the motor, makes cooling chamber, assembly chamber, interior casing intercommunication circulation heat dissipation, and the radiating effect is better, long service life.

In foretell micro motor, the cold wind passageway include and be provided with the fresh air inlet on the end cover, the assembly chamber communicate with the external world through the fresh air inlet, two equipartitions of end cover the ventilation hole, assembly chamber and cooling chamber communicate through the ventilation hole, the inner partition on be provided with the intercommunicating pore, cooling chamber and interior casing pass through the intercommunicating pore intercommunication, the inner casing wall on be provided with the air outlet, the cooling chamber pass through air outlet and external intercommunication. The purpose of setting up like this is to make cooling chamber, assembly chamber, interior casing circulation intercommunication, improves the radiating effect of every cavity.

In the above-mentioned micro motor, the cooling fan is an axial fan, when the cooling fan rotates, cold air flows into the assembly cavity through the air inlet hole, the control piece installed in the assembly cavity dissipates heat through the cold air, the cold air flowing into the assembly cavity flows to the cooling cavity through the air vent, a part of the cold air in the cooling cavity flows into the inner shell through the communicating hole to dissipate heat of the stator and the rotor, and the other part of the cold air flows out of the motor through the air outlet. The purpose of setting up like this is that make control piece, motor rotor, stator can good heat dissipation, long service life.

In the micro motor, the cooling cavity is fixedly provided with a filter plate, the filter plate is provided with filter holes, and the filter plate is positioned in the middle between the air outlet and the inner partition plate. The purpose that sets up like this prevents to have impurity entering between motor stator and the rotor in the cold wind, prevents that the motor from rotating the card and dying to burn out.

In the miniature motor, the middle position of the inner wall of the bottom cover is provided with a mounting column, the control piece is sleeved on the mounting column, a first rubber annular ring is arranged on the mounting column between the control piece and the bottom cover, and a second rubber annular ring is arranged on the mounting column between the control piece and the second end cover. The purpose of setting up like this is that make the control piece have when cold wind flows and lean on cushioning effect, increases the life of control piece.

In the above-mentioned micro motor, the outer housing and the inner housing are circumferentially spaced and matched when being axially connected in the same direction. The purpose of this arrangement is to increase the mechanical strength of the same axial connection of the outer and inner housings.

In the above-mentioned micro motor, the side wall of the inner housing located outside the stator further has a strip-shaped through hole. The purpose of this arrangement is to enable the inner shell to be sufficiently air-cooled for heat dissipation.

Compared with the prior art, the micro motor has the advantages that: structural design is reasonable, simple, sets up the cold wind passageway in the motor, and the cold wind passageway forced air cooling circulation of flowing when passing through radiator fan, and the radiating effect is better, long service life.

Drawings

Fig. 1 is a schematic perspective view of the present micro-motor.

In the figure, 1, end cover one; 2. an outer housing; 3. a second end cover; 4. an inner housing; 5. a stator; 6. a rotor; 7. a motor shaft; 8. an inner partition plate; 9. a bottom cover; 10. a control member; 11. a heat radiation fan; 12. an air inlet hole; 13. a vent hole; 14. a communicating hole; 15. an air outlet; 16. a filter plate; 17. a filtration pore; 18. mounting a column; 19. a rubber annular ring I; 20. a rubber annular ring II; 21. a strip-shaped through opening.

Detailed Description

The following are specific embodiments of the present invention and the accompanying drawings are used to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

As shown in figure 1, the miniature motor mainly comprises an outer shell 2 with an end cover I1 and an inner shell 4 with an end cover II 3, wherein the inner shell 4 and the outer shell 2 are oppositely connected in the same axial direction, a stator 5, a rotor 6 and a motor shaft 7 are arranged in the inner shell 4, the rotor 6 is fixedly matched with the motor shaft 7 in the circumferential direction, the stator 5 is fixed on the inner wall of the inner shell 4 and is positioned at the outer side of the rotor 6 to be in clearance fit with the rotor 6, an inner partition plate 8 is arranged at the inner end of the inner shell 4, a cooling cavity is formed by the inner partition plate 8 and the end cover II 3 of the inner shell 4, a bottom cover 9 is arranged at the outer end of the inner shell 4, an assembly cavity for installing a control part 10 is formed by the bottom cover 9 and the end cover II 3 of the inner shell 4, a cold air channel for communicating the cooling cavity, the assembly, the other end of the motor shaft 7 extends out of the end cover II 3 and extends into the cooling cavity, and a cooling fan 11 enabling cold air in the cold air channel to flow is fixedly arranged at the other end of the motor shaft 7 in the cooling cavity.

During actual manufacturing, the specific structure of the cold air channel is as follows: an air inlet hole 12 is formed in the bottom cover 9, the assembly cavity is communicated with the outside through the air inlet hole 12, vent holes 13 are uniformly distributed in the end cover II 3, the assembly cavity is communicated with the cooling cavity through the vent holes 13, a communicating hole 14 is formed in the inner partition plate 8, the cooling cavity is communicated with the inner shell 4 through the communicating hole 14, an air outlet 15 is formed in the wall of the inner shell 4, and the cooling cavity is communicated with the outside through the air outlet 15; in practical design, the cooling fan 11 is an axial fan, when the cooling fan 11 rotates, cold air flows into the assembly cavity through the air inlet 12, the control element 10 installed in the assembly cavity dissipates heat through the cold air, the cold air flowing into the assembly cavity flows into the cooling cavity through the air outlet 13, a part of the cold air in the cooling cavity flows into the inner shell 4 through the communication hole 14 to dissipate heat of the stator 5 and the rotor 6, and the other part of the cold air flows out of the motor through the air outlet 15.

In practical application, a filter plate 16 is fixedly arranged in the cooling cavity, a filter hole 17 is formed in the filter plate 16, and the filter plate 16 is located in the middle between the air outlet 15 and the inner partition plate 8.

In actual manufacturing, the specific assembly structure of the control member 10 in the assembly cavity is as follows: the middle position of the inner wall of the bottom cover 9 is provided with a mounting column 18, the control part 10 is sleeved on the mounting column 18, a first rubber annular ring 19 is arranged on the mounting column 18 between the control part 10 and the bottom cover 9, and a second rubber annular ring 20 is arranged on the mounting column 18 between the control part 10 and the second end cover 3.

In the actual design, the outer shell 2 and the inner shell 4 are in circumferential interval fit when being connected in the same axial direction; the side wall of the inner housing 4 outside the stator 5 also has a strip-shaped through opening 21.

Those not described in detail in this specification are within the skill of the art. The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.

Claims

1. A micro motor comprises an outer shell (2) with a first end cover (1) and an inner shell (4) with a second end cover (3), wherein the inner shell (4) and the outer shell (2) are oppositely connected in the same axial direction, a stator (5), a rotor (6) and a motor shaft (7) are arranged in the inner shell (4), the rotor (6) and the motor shaft (7) are fixedly matched in the circumferential direction, the stator (5) is fixed on the inner wall of the inner shell (4) and is positioned at the outer side of the rotor (6) to be in clearance fit with the rotor (6), and the micro motor is characterized in that an inner partition plate (8) is arranged at the inner end of the inner shell (4), a cooling cavity is formed by the inner partition plate (8) and the second end cover (3) of the inner shell (4), a bottom cover (9) is arranged at the outer end of the inner shell (4), and an assembly cavity for installing a control piece (10) is formed by the bottom cover (9) and the, the motor in be provided with the cold wind passageway that makes cooling chamber, assembly chamber, interior casing (4) intercommunication, the one end of motor shaft (7) stretch out end cover one (1) be used for the transmission to connect, the other end of motor shaft (7) stretch out end cover two (3) and extend to the cooling intracavity, the other end of motor shaft (7) that is in the cooling intracavity sets firmly radiator fan (11) that make cold wind passageway cold wind flow.

2. The micro-motor according to claim 1, wherein the cooling air channel comprises an air inlet hole (12) arranged on a bottom cover (9), the assembly cavity is communicated with the outside through the air inlet hole (12), vent holes (13) are uniformly distributed on the second end cover (3), the assembly cavity is communicated with the cooling cavity through the vent holes (13), a communication hole (14) is arranged on the inner partition plate (8), the cooling cavity is communicated with the inner shell (4) through the communication hole (14), an air outlet (15) is arranged on the wall of the inner shell (4), and the cooling cavity is communicated with the outside through the air outlet (15).

3. The micro-motor according to claim 2, wherein the heat dissipation fan (11) is an axial fan, when the heat dissipation fan (11) rotates, the cool air flows into the assembly chamber through the air inlet hole (12), the control member (10) installed in the assembly chamber dissipates heat through the cool air, the cool air flowing into the assembly chamber flows into the cooling chamber through the air outlet hole (13), a portion of the cool air in the cooling chamber flows into the inner housing (4) through the communication hole (14) to dissipate heat of the stator (5) and the rotor (6), and another portion of the cool air flows out of the motor through the air outlet hole (15).

4. A miniature motor as claimed in claim 3, wherein a filter plate (16) is further fixedly arranged in said cooling chamber, said filter plate (16) having filter holes (17), said filter plate (16) being positioned in the middle between said air outlet (15) and said inner partition (8).

5. A miniature motor according to claim 4, wherein a mounting post (18) is arranged at the middle position of the inner wall of the bottom cover (9), the control member (10) is sleeved on the mounting post (18), a first rubber annular ring (19) is arranged on the mounting post (18) between the control member (10) and the bottom cover (9), and a second rubber annular ring (20) is arranged on the mounting post (18) between the control member (10) and the second end cover (3).

6. A miniature motor according to claim 5, wherein said outer housing (2) and said inner housing (4) are circumferentially spaced in a common axial connection.

7. A miniature motor according to claim 6, characterized in that the side walls of the inner housing (4) outside the stator (5) are provided with strip-shaped through openings (21).