CN216312821U - Miniature motor structure and have miniature motor from heat dissipation - Google Patents

Abstract

The utility model relates to a miniature motor that dispels heat from and have miniature motor that dispels heat from structure relates to the field of motor, and miniature motor structure that dispels heat from includes the casing and locates the iron core in the casing, be equipped with the pivot in the iron core, the casing is stretched out to the tip of pivot, leave 0.5-2 mm's clearance between iron core lateral wall and the casing inside wall. Miniature motor structure and have miniature motor from dispelling the heat in this application all have the effect of solving the iron core heat dissipation simultaneously and the rust problem of iron core.

Description

Miniature motor structure and have miniature motor from heat dissipation

Technical Field

The present application relates to the field of electric motors, and more particularly, to a miniature self-radiating motor structure and an electric motor having the same.

Background

The motor is applied to the fields of information processing, transportation, household appliances and national defense, and particularly the fields of household appliances such as a household dust collector and a micro motor are more commonly applied. Micro motor is when long-time during operation, and inside iron core can produce the heat along with operating time's extension, and in order to reduce the heat and exert an influence to the iron core, the heat dissipation problem of iron core can be considered usually in the manufacturing process in the enterprise.

Currently, it is conventional to directly expose the core to facilitate heat dissipation from the core. However, when a part with water stains is cleaned by the household dust collector, the water stains enter the motor, so that the motor can be damaged, and rusting of the iron core can be accelerated. Therefore, in order to expose the iron core and reduce the rusting problem of the iron core, an anti-rust layer is usually sprayed on the outer surface of the iron core, but the manufacturing cost of the motor is undoubtedly increased by additionally spraying the anti-rust layer on the iron core. Therefore, the inventor considers that how to solve the problem of heat dissipation of the iron core and rusting of the iron core at the same time is a problem which needs to be solved urgently at present.

SUMMERY OF THE UTILITY MODEL

In order to solve the rusty problem of iron core heat dissipation and iron core, this application provides miniature motor structure and have miniature motor from heat dissipation motor structure.

First aspect, this application provides miniature from heat dissipation motor structure adopts following technical scheme:

the miniature self-radiating motor structure comprises a shell and an iron core arranged in the shell, wherein a rotating shaft is arranged in the iron core, the end part of the rotating shaft extends out of the shell, and a gap of 0.5-2mm is reserved between the outer side wall of the iron core and the inner side wall of the shell.

By adopting the technical scheme, the iron core is protected by the shell, so that the possibility that water enters the shell to rust the iron core is reduced; when the iron core produced heat in the course of the work, the heat can be given the casing by the air dielectric transmission between iron core and the casing, dispels the heat via the casing again to can reduce the iron core simultaneously again and rust and influence the problem that the iron core used when reaching the heat dissipation purpose.

Optionally, a gap between the outer side wall of the iron core and the inner side wall of the shell is 1 mm.

Through adopting above-mentioned technical scheme, help the heat that the iron core produced can be better dispel the heat via air and casing.

Optionally, the casing is made of aluminum or heat-conducting PPS.

By adopting the technical scheme, the aluminum and the heat conduction PPS have better heat transfer performance, so that the shell can better dissipate heat.

Optionally, the inner side wall of the shell is provided with a boss for supporting the iron core.

Through adopting above-mentioned technical scheme to install the iron core in the casing.

Optionally, the end face of the shell is provided with an embedded groove, and the rotating shaft is provided with a labyrinth sealing ring inserted into the embedded groove.

Through adopting above-mentioned technical scheme to seal the countershaft, reduce the possibility that water stain enters into between casing and the stator vane along the pivot.

In a second aspect, the present application provides a motor with a micro self-radiating motor structure, which adopts the following technical scheme:

the motor with the miniature self-radiating motor structure comprises the miniature self-radiating motor structure, a rotating shaft is arranged in an iron core, the end part of the rotating shaft extends out of a shell, a protective cylinder is connected to the outside of the shell, an air passing hole is reserved between the shell and the protective cylinder, and the protective cylinder is connected with an end cover;

the cover is equipped with the movable vane wheel that is located the end cover in the pivot, be equipped with the fixed vane wheel that is located between casing and the movable vane wheel on the casing, the terminal surface of locating wheel laminating on the casing, the impeller is passed in the pivot, be equipped with the ventilation hole between fixed vane wheel and the protection section of thick bamboo, it has the holding tank to open on the fixed vane wheel, the cover is equipped with the oil blanket that is located the holding tank in the pivot.

Through adopting above-mentioned technical scheme, when the pivot drove movable vane wheel and rotates, movable vane wheel can produce wind-force to in inhaling the protection section of thick bamboo from the end cover with outside water stain filth, discharge via the ventilation hole again, utilize fixed impeller and oil blanket to carry out the terminal surface of separation movable vane wheel and casing, reduce water stain and enter into in the casing and make the rusty possibility of iron core along the pivot.

Optionally, a water-proof ring is arranged on the fixed impeller.

Through adopting above-mentioned technical scheme, the air current part that the movable vane produced can drive water stain and filth and remove along the surface of deciding the impeller, utilizes water proof ring to carry out the separation to water stain and filth, reduces water stain and filth and moves to the possibility of pivot along the surface of deciding the impeller, further reduces water stain and gets into inside and make the rusty possibility of iron core of casing along the pivot.

Optionally, the fixed impeller and the housing are connected by screws.

Through adopting above-mentioned technical scheme to the stable installation of stator vane wheel is on the casing.

Optionally, a positioning rod is arranged on the fixed impeller, and a positioning groove for inserting the positioning rod is formed in the shell.

Through adopting above-mentioned technical scheme, utilize locating lever and constant head tank to fix a position the impeller, the staff of being convenient for installs the screw to with the accurate installation of stator impeller on the casing.

Optionally, the length of the positioning rod is smaller than the depth of the positioning groove, and the positioning groove is communicated with the gap between the shell and the fixed impeller and the gap between the positioning groove and the shell and the protective barrel.

By adopting the technical scheme, when water stain enters between the fixed impeller and the shell along the rotating shaft, and airflow generated by the movable impeller flows through the air holes, negative pressure is generated between the shell and the protection barrel, so that the pressure in the shell is greater than the pressure between the shell and the protection barrel; at this moment, the water stain in the casing can be under the effect of pressure along the automatic flow direction overfire wind hole of constant head tank to reduced water stain along the pivot through the casing terminal surface and entered into the inside possibility of casing.

In summary, the present application includes at least one of the following beneficial technical effects:

1. according to the method, the iron core is protected by the shell, and a certain gap is reserved between the shell and the iron core, so that heat generated by the iron core can be dissipated through air and the shell, and the problems of heat dissipation of the iron core and rusting of the iron core are solved at the same time;

2. the end face of the shell and the rotating shaft are sealed by the fixed impeller and the oil seal, so that the possibility that water stains enter the shell along the rotating shaft is reduced, and the possibility that an iron core rusts is further reduced;

3. this application utilizes the constant head tank to discharge and enters into the casing and decide the water stain between the impeller, can further reduce water stain along the pivot from the terminal surface of casing and enter into the inside possibility of casing.

Drawings

Fig. 1 is a schematic overall structure diagram of a micro self-heat-dissipation motor structure according to an embodiment of the present application.

Fig. 2 is a cross-sectional view of a housing in a micro self-heat-dissipating motor structure according to an embodiment of the present disclosure.

Fig. 3 is a schematic structural diagram of a mounting hole and an insertion hole in a micro self-heat-dissipation motor structure according to an embodiment of the present application.

Fig. 4 is a schematic overall structure diagram of an electric machine with a micro self-heat-dissipation motor structure according to an embodiment of the present application.

Fig. 5 is a cross-sectional view of a housing and an end cap in an electric machine with a micro self-radiating motor structure according to an embodiment of the present application.

Fig. 6 is an exploded view of an electric machine with a miniature self-radiating motor structure according to an embodiment of the present application.

Fig. 7 is a schematic structural diagram of a fixed impeller of an electric machine with a micro self-radiating motor structure according to an embodiment of the present application.

Description of reference numerals: 1. a housing; 11. a boss; 12. mounting holes; 121. an insertion hole; 13. a groove is embedded; 14. a protective cylinder; 141. connecting blocks; 15. an end cap; 151. covering the opening; 16. fixing an impeller; 161. a base plate; 162. a wind-shield ring; 163. connecting sheets; 164. a fixing hole; 165. positioning a rod; 166. a central bore; 167. a water-proof ring; 17. mounting grooves; 18. positioning a groove; 2. a motor body; 21. a rotating shaft; 22. an iron core; 23. a movable impeller; 24. oil sealing; 3. a labyrinth seal ring; 31. and (6) sealing the cylinder.

Detailed Description

The present application is described in further detail below with reference to figures 1-7.

The embodiment of the application discloses miniature motor structure that dispels heat certainly.

Referring to fig. 1 and 2, the micro self-cooling motor structure includes a housing 1, a motor body 2 is disposed in the housing 1, the motor body 2 includes a rotating shaft 21 and an iron core 22 disposed outside the rotating shaft 21, and an end of the rotating shaft 21 extends out of the housing 1. Be equipped with a plurality of boss 11 on the inside wall of casing 1 to be used for bearing iron core 22, fix iron core 22 in casing 1.

Referring to fig. 2, a gap of 0.5-2mm is left between the outer sidewall of the core 22 and the inner sidewall of the housing 1, in this embodiment, the gap between the outer sidewall of the core 22 and the inner sidewall of the housing 1 is 1mm, and in other embodiments, the gap between the outer sidewall of the core 22 and the inner sidewall of the housing 1 may be adjusted correspondingly except for this embodiment. The housing 1 is made of a material with good thermal conductivity, such as aluminum or PPS, and has a certain strength to support the core 22 while ensuring that the housing 1 has good thermal conductivity.

Referring to fig. 2 and 3, the housing 1 has an end portion formed with a mounting hole 12 through which the rotation shaft 21 passes. The tip of casing 1 is opened has embedded groove 13, and the cover is equipped with the labyrinth seal ring 3 that the embedded groove 13 was gone into to the pivot 21, and the inside wall of embedded groove 13 is equipped with the embedding tooth with the sealed tooth meshing on the labyrinth seal ring 3. When pivot 21 drove labyrinth sealing ring 3 and rotates, labyrinth sealing ring 3 can rotate in embedded groove 13, utilizes the mutually supporting between sealed tooth and the embedded tooth, can reduce the water stain and enter into the inside possibility so that iron core 22 rusts of casing 1 along the clearance between pivot 21 and the mounting hole 12.

In order to further reduce the possibility of water stains entering the housing 1, the labyrinth seal ring 3 is provided with a seal cylinder 31, the housing 1 is provided with an insertion hole 121 into which the seal cylinder 31 is inserted, the insertion hole 121 is communicated with the mounting hole 12, and the aperture of the insertion hole 121 is smaller than that of the mounting hole 12, so that the possibility of water stains entering the housing 1 from the insertion hole 121 and the mounting hole 12 is further reduced.

The implementation principle of the miniature self-radiating motor structure of the embodiment of the application is as follows: the iron core 22 is arranged in the shell 1, the shell 1 is utilized to protect the iron core 22, and heat generated by the iron core 22 during working can be transmitted to the shell 1 through an air medium between the iron core 22 and the shell 1 and then is radiated through the shell 1; simultaneously, utilize labyrinth seal ring 3 to carry out the separation to water stain, when reaching iron core 22 and dispel the heat the purpose, can reduce water stain again and enter into inside and make the rusty possibility of iron core 22 of casing 1 to the radiating and rusty problem of iron core 22 has been solved simultaneously.

The embodiment of the application also discloses a motor with a miniature self-radiating motor structure.

Referring to fig. 4 and 5, the motor with the micro self-heat-dissipation motor structure includes a micro self-heat-dissipation motor structure, a hollow protective cylinder 14 is coaxially sleeved outside the housing 1, a plurality of obliquely arranged connecting blocks 141 are connected between the housing 1 and the protective cylinder 14, and an air passing hole is formed between adjacent connecting blocks 141. The protective cylinder 14 is provided with an end cover 15, the end cover 15 is provided with a cover opening 151, and the rotating shaft 21 is provided with a movable impeller 23 positioned in the end cover 15. When the motor is installed on the dust collector, the cover opening 151 is communicated with the outside, when the rotating shaft 21 drives the movable impeller 23 to rotate, the wind generated by the movable impeller 23 has certain suction, external water stains and dirt can be sucked from the cover opening 151 of the end cover 15, and the water stains and the dirt are discharged into a storage device in the dust collector through the wind passing hole.

Referring to fig. 6 and 7, the housing 1 is provided with a fixed impeller 16, the fixed impeller 16 includes a bottom plate 161 and a wind-blocking ring 162 disposed on the bottom plate 161, the wind-blocking ring 162 is provided with a plurality of connecting pieces 163 attached to the shield cylinder 14, and a vent hole is formed between adjacent connecting pieces 163. The bottom plate 161 is provided with a fixing hole 164, the housing 1 is provided with a mounting groove 17, and the bottom plate 161 and the housing 1 are connected by a screw inserted into the fixing hole 164 and the mounting groove 17. When bottom plate 161 is installed on casing 1, the terminal surface of windshield ring 162 laminating in casing 1 to seal the terminal surface of casing 1, reduce water stain and the filth and enter into in the windshield ring 162 from the clearance between windshield ring 162 and casing 1. In order to facilitate the worker to accurately install the fixed impeller 16 on the casing 1, the bottom plate 161 is provided with a positioning rod 165, the casing 1 is provided with a positioning groove 18 for inserting the positioning rod 165, and the fixed impeller 16 can be positioned by using the positioning rod 165 and the positioning groove 18.

Referring to fig. 6 and 7, the base plate 161 is provided with a central hole 166 for the rotating shaft 21 to pass through, the rotating shaft 21 is sleeved with the oil seal 24 positioned in the central hole 166, and the outer side wall of the oil seal 24 just lightly contacts with the inner side wall of the central hole 166, so that the purpose of sealing the central hole 166 is achieved, and the possibility that water stains enter between the base plate 161 and the housing 1 from the central hole 166 is reduced. When the rotating shaft 21 drives the oil seal 24 to rotate, the friction between the oil seal 24 and the base plate 161 can cause abrasion to the oil seal 24, and for this reason, the oil seal 24 is made of a PTEE material, so as to improve the wear resistance and the service life of the oil seal 24.

Referring to fig. 6, two water isolating rings 167 coaxial with the central hole 166 are disposed on the bottom plate 161, when the movable impeller 23 rotates, the generated airflow may drive water stains and dirt to move on the bottom plate 161, and the water stains and the dirt are isolated by the water isolating rings 167, so that the possibility that the water stains move towards the oil seal 24 and then enter between the housing 1 and the bottom plate 161 along the rotating shaft 21 can be reduced.

Referring to fig. 6, after the rotating shaft 21 is used for a long time, the oil seal 24 inevitably wears, and at this time, water may enter between the housing 1 and the bottom plate 161 from the central hole 166, and may enter the inside of the housing 1 along the rotating shaft 21. For this reason, the length of the positioning rod 165 is designed to be smaller than the depth of the positioning groove 18, and the gap between the positioning groove 18 and the housing 1 and the bottom plate 161 and the gap between the housing 1 and the shield cylinder 14 are communicated with each other. When the movable impeller 23 rotates, the airflow generated by the movable impeller 23 passes through the ventilation hole and the air passing hole, and negative pressure is formed between the protective cylinder 14 and the casing 1, so that the pressure between the casing 1 and the bottom plate 161 is greater than the pressure between the protective cylinder 14 and the casing 1, and water stains between the casing 1 and the bottom plate 161 can be prompted to automatically flow to the positioning groove 18 and be discharged through the air passing hole.

The implementation principle of the motor with the miniature self-radiating motor structure in the embodiment of the application is as follows: when the motor is used on the dust collector, the airflow generated by the movable impeller 23 can suck external water stains and dirt into the end cover 15 from the cover opening of the end cover 15 and discharge the water stains and the dirt into a storage device inside the dust collector through the ventilation hole and the air passing hole. The iron core 22 is protected by the shell 1, so that the possibility of rusting of the iron core 22 caused by water stain can be reduced; meanwhile, the fixed impeller 16 and the oil seal 24 seal the end surface of the housing 1 and the rotating shaft 21, and the possibility that water stains enter between the housing 1 and the bottom plate 161 and then enter the interior of the housing 1 along the rotating shaft 21 can be reduced.

When water stains enter between the shell 1 and the bottom plate 161, the negative pressure formed between the protective cylinder 14 and the shell 1 by the airflow generated by the movable impeller 23 can promote the water stains to automatically flow to the positioning groove 18 and flow to the air passing hole through the positioning groove 18, so that the possibility that the water stains enter the shell 1 along the rotating shaft 21 is reduced.

For the heat dissipation of the iron core 22, the air medium between the iron core 22 and the shell 1 is utilized to transfer the heat to the shell 1, and then the shell 1 with heat conductivity is used for heat dissipation, so that the purpose of heat dissipation is achieved; simultaneously, the air current that movable vane wheel 23 produced also can dispel the heat to casing 1 when the wind hole that crosses to further improve the radiating effect, finally reach the purpose of solving the heat dissipation of iron core and the rust problem of iron core simultaneously.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims (10)

1. Miniature motor structure from dispelling the heat, its characterized in that: including casing (1) and iron core (22) of locating in casing (1), be equipped with pivot (21) in iron core (22), casing (1) is stretched out to the tip of pivot (21), leave 0.5-2 mm's clearance between iron core (22) lateral wall and casing (1) inside wall.

2. The micro self-heat-dissipating motor structure according to claim 1, wherein: the clearance between the outer side wall of the iron core (22) and the inner side wall of the shell (1) is 1 mm.

3. The micro self-heat-dissipating motor structure according to claim 1, wherein: the shell (1) is made of aluminum or heat-conducting PPS.

4. The micro self-heat-dissipating motor structure according to claim 1, wherein: the inner side wall of the shell (1) is provided with a boss (11) used for bearing the iron core (22).

5. The micro self-heat-dissipating motor structure according to claim 1, wherein: the end face of the shell (1) is provided with an embedded groove (13), and a labyrinth sealing ring (3) inserted into the embedded groove (13) is installed on the rotating shaft (21).

6. Motor with miniature motor structure that dispels heat certainly, its characterized in that: the miniature self-heat-dissipation motor structure comprises the miniature self-heat-dissipation motor structure as claimed in any one of claims 1-5, wherein a protective cylinder (14) is connected to the outside of the shell (1), an air passing hole is reserved between the shell (1) and the protective cylinder (14), and an end cover (15) is connected to the protective cylinder (14);

the cover is equipped with movable impeller (23) that are located end cover (15) in pivot (21), be equipped with on casing (1) and be located casing (1) and movable impeller (23) between decide impeller (16), decide the terminal surface of impeller (16) laminating on casing (1), pivot (21) are passed and are decided impeller (16), decide and be equipped with the ventilation hole between impeller (16) and protective barrel (14), it has the holding tank to open on impeller (16), the cover is equipped with oil blanket (24) that are located the holding tank on pivot (21).

7. The electric machine with a miniature self-heat-dissipation motor structure as set forth in claim 6, wherein: and a water isolating ring (167) is arranged on the fixed impeller (16).

8. The electric machine with a miniature self-heat-dissipation motor structure as set forth in claim 6, wherein: the fixed impeller (16) is connected with the shell (1) through screws.

9. The electric machine with a miniature self-heat-dissipating motor structure of claim 8, wherein: the fixed impeller (16) is provided with a positioning rod (165), and the shell (1) is provided with a positioning groove (18) for inserting the positioning rod (165).

10. The electric machine with a miniature self-heat-dissipating motor structure according to claim 9, wherein: the length of the positioning rod (165) is smaller than the depth of the positioning groove (18), and the positioning groove (18) is communicated with the gap between the shell (1) and the fixed impeller (16) and the gap between the positioning groove (18) and the shell (1) and the protective cylinder (14).

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