CN213402732U

CN213402732U - Heat radiation structure of motor for electric tool

Info

Publication number: CN213402732U
Application number: CN202022683439.2U
Authority: CN
Inventors: 陈杰雄
Original assignee: Yongkang Xiaocheng Electric Appliance Co ltd
Current assignee: Yongkang Xiaocheng Electric Appliance Co ltd
Priority date: 2020-11-19
Filing date: 2020-11-19
Publication date: 2021-06-08
Anticipated expiration: 2030-11-19

Abstract

The utility model discloses a heat radiation structure of motor for electric tool, including the casing of motor, the end cover of motor, the stator of motor, the rotor of motor, the first heat radiation structure of motor, the second heat radiation structure of motor and the third heat radiation structure of motor, the bottom of casing is provided with the supporting legs, one side of casing is the open type design, end cover fixed mounting is in one side department that the casing is the open type design, end cover department is provided with the air intake, a plurality of air outlets have been seted up in one time of keeping away from the end cover to the casing, stator fixed mounting is in the inside inner wall department of casing, the output shaft of rotor passes through bearing movable mounting in the inside of casing, just the output shaft of rotor runs through the outside that extends to the casing. The utility model discloses it is better to the inside heat dissipation treatment effect of motor, and efficiency is higher, has avoided the motor inside to be in high temperature state for a long time and has received the damage, has prolonged its life, and the practicality is higher.

Description

Heat radiation structure of motor for electric tool

Technical Field

The utility model relates to an electrical equipment field specifically is a heat radiation structure of motor for electric tool.

Background

The motor mainly functions to generate driving torque, is used as a power source of electrical appliances or various machines, converts mechanical energy into electric energy, consists of a stator and a rotor, the stator is a stationary part of the motor, the stator consists of a stator iron core, a stator winding and a machine base, and mainly functions to generate a rotating magnetic field, the rotor mainly functions to be cut by magnetic lines of force in a rotating magnetic field to generate current, and according to the ISO standard, a rotating body supported by a bearing is called as a rotor, the rotor is mainly a main rotating part in a power machine and a working machine, typical rotors include a turbomachine rotor, a motor rotor, rotors of various pumps, a rotor of a turbocompressor and the like, the rotor can be greatly deformed and cause resonance when rotating at certain specific rotating speed, and the rotating speed at which the resonance is caused is called as the critical rotating speed of the rotor.

However, the existing motor has the following disadvantages in working:

the work of its inside stator and rotor or produce great heat, and the inside heat of casing is singly just rotated by the flabellum of rotor afterbody and is dispelled the heat, leads to its unable inside heat dissipation demand of satisfying the motor completely, and long-time, the inside high temperature state work that can continuously be in of motor to the holistic life of greatly reduced motor causes the unnecessary damage even, causes the unnecessary loss then, and the practicality is relatively poor.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a heat radiation structure of motor for electric tool, with solve traditional motor at the during operation, the work of its inside stator and rotor or produce great heat, and the inside heat of casing is singly just rotated by the flabellum of rotor afterbody and is dispelled the heat, lead to its unable inside heat dissipation demand of satisfying the motor completely, it is long-lasting, the inside can continuously be in high temperature state work of motor, thereby the holistic life of greatly reduced motor, cause the unnecessary damage even, cause the unnecessary loss then, the relatively poor problem of practicality.

In order to achieve the above object, the utility model provides a following technical scheme: a heat dissipation structure of a motor for an electric tool comprises a shell of the motor, an end cover of the motor, a stator of the motor, a rotor of the motor, a first heat dissipation structure of the motor, a second heat dissipation structure of the motor and a third heat dissipation structure of the motor, wherein supporting legs are arranged at the bottom of the shell, one side of the shell is designed in an open mode, the end cover is fixedly arranged at one side of the shell in the open mode, an air inlet is formed in the end cover, a plurality of air outlets are formed in the shell far away from the end cover at one time, the stator is fixedly arranged at the inner wall of the shell, an output shaft of the rotor is movably arranged in the shell through a bearing, the output shaft of the rotor penetrates through the shell and extends to the outside of the shell, an extension shaft is arranged at one side of the rotor far away from the output end, and the first heat dissipation, the second heat dissipation structure is installed inside the shell, penetrates through the shell and extends to the outer surface of the shell, and the third heat dissipation structure is installed on the periphery of the outer portion of the second heat dissipation structure.

Preferably, the first heat dissipation structure comprises two sets of fan blades, the two sets of fan blades are respectively and fixedly installed at the outer parts of the output shaft and the extension shaft, and the two sets of fan blades are both located inside the shell.

Preferably, the wind directions of the two sets of fan blades are consistent, and the wind directions of the two sets of fan blades face the air outlet of the shell.

Preferably, the second heat dissipation structure includes a first annular heat collection plate and a second arc heat collection plate, the first heat collection plate is provided with two, the first heat collection plate is fixedly mounted in the inner portion of the housing, the two first heat collection plates are respectively located at two sides of the rotor, the two peripheries of the first heat collection plates all penetrate through the outer portion of the housing and extend to the housing, the second heat collection plate is provided with a plurality of, two ends of the second heat collection plate are respectively fixedly connected with the two first heat collection plates, and the second heat collection plate is located between the stator and the rotor.

Preferably, the first heat collecting plate and the second heat collecting plate are made of copper materials.

Preferably, the third heat dissipation structure comprises a plurality of heat dissipation fins made of copper materials, the heat dissipation fins are equally divided into two groups, and the two groups of heat dissipation fins are respectively and fixedly arranged on the periphery of the outer portions of the two first heat collection plates in an equidistant annular distribution manner.

The utility model provides a heat radiation structure of motor for electric tool possesses following beneficial effect:

the utility model is provided with the first heat dissipation structure, the second heat dissipation structure and the third heat dissipation structure, so that when the motor works, the two sets of fan blades can be driven to rotate to match with the air inlet and the air outlet, the interior of the motor is subjected to primary ventilation and heat dissipation treatment, and the first heat collecting plate is matched with the second heat collecting plate, it is possible to concentrate and transmit the heat to the outside of the case by the first heat collecting plate, exchange heat with the cool air of the outside, thereby carry out further thermal treatment to the inside of casing, at last, can accelerate the heat exchange between first thermal-arrest board and the air through a plurality of radiating fin, improvement once more to the inside thermal treatment effect of casing, the effectual casing of having avoided is inside to be in the state of lasting high temperature, then the effectual motor of having avoided appearing damaging, has prolonged its life, has avoided causing the unnecessary loss, and the practicality is higher.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a side view of the housing of the present invention;

fig. 3 is a side view of the heat dissipating fin of the present invention;

fig. 4 is a side view of the fan blade of the present invention.

In the figure: 1. a housing; 2. an end cap; 3. a stator; 4. a rotor; 5. an air inlet; 6. an air outlet; 7. an output shaft; 8. an extension shaft; 9. a fan blade; 10. a first heat collecting plate; 11. a second heat collecting plate; 12. and (4) radiating fins.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

As shown in fig. 1-4, the utility model provides a technical solution: a heat dissipation structure of a motor for an electric tool comprises a housing 1 of the motor, an end cover 2 of the motor, a stator 3 of the motor, a rotor 4 of the motor, a first heat dissipation structure of the motor, a second heat dissipation structure of the motor and a third heat dissipation structure of the motor, wherein supporting legs are arranged at the bottom of the housing 1, one side of the housing 1 is designed in an open mode, the end cover 2 is fixedly arranged at one side of the housing 1 in the open mode, an air inlet 5 is arranged at the end cover 2, a plurality of air outlets 6 are arranged at one time on the housing 1 far away from the end cover 2, the stator 3 is fixedly arranged at the inner wall of the housing 1, an output shaft 7 of the rotor 4 is movably arranged inside the housing 1 through a bearing, the output shaft 7 of the rotor 4 penetrates through and extends to the outside of the housing 1, and an extension shaft 8 is arranged at one side of the rotor 4 far, the first heat dissipation structure is installed at the output shaft 7 and the extension shaft 8, the second heat dissipation structure is installed inside the shell 1, the second heat dissipation structure penetrates through the shell 1 and extends to the outer surface of the shell 1, and the third heat dissipation structure is installed at the periphery of the outer portion of the second heat dissipation structure.

The first heat dissipation structure comprises two groups of fan blades 9, the two groups of fan blades 9 are respectively and fixedly arranged at the outer parts of the output shaft 7 and the extension shaft 8, and the two groups of fan blades 9 are positioned in the shell 1, so that when the stator 3 and the rotor 4 in the shell 1 work, the fan blades 9 can be driven to rotate, and preliminary ventilation and heat dissipation treatment is carried out on the interior of the shell 1 by matching with the air inlet 5 and the air outlet 6;

the wind directions of the two groups of fan blades 9 are consistent, and the wind directions of the two groups of fan blades 9 face the air outlet 6 of the shell 1, so that ventilation circulation heat dissipation treatment is conveniently formed in the shell 1;

the second heat dissipation structure includes a first heat collection plate 10 having a ring shape and a second heat collection plate 11 having a arc shape, two first heat collection plates 10 are disposed, two first heat collection plates 10 are both fixedly installed at an inner portion of the housing 1, two first heat collection plates 10 are respectively located at both sides of the rotor 4, and the peripheries of the two first heat collection plates 10 extend to an outer portion of the housing 1 through the housing 1, the second heat collection plate 11 is provided with a plurality of second heat collection plates 11, both ends of the plurality of second heat collection plates 11 are respectively fixedly connected to the two first heat collection plates 10, and the second heat collection plate 11 is located between the stator 3 and the rotor 4, so that when the stator 3 and the rotor 4 operate, heat inside the housing 1 can be concentrated and transferred to the first heat collection plates 10 through the plurality of second heat collection plates 11, and then heat exchange with cold air outside the housing 1 through the peripheries of the first heat collection plates 10, the temperature in the shell 1 is reduced, so that the aim of further radiating the inside of the shell 1 is fulfilled;

the first heat collecting plate 10 and the second heat collecting plate 11 are both made of copper materials, and the heat conduction and heat exchange efficiency of the copper materials is high;

the third heat radiation structure includes a plurality of radiating fin 12 that adopt the copper material to make, and is a plurality of radiating fin 12 equallyd divide into two sets ofly, and is two sets of radiating fin 12 is equidistant annular distribution fixed mounting respectively in the outside of two first heat collection plates 10 department all around for when first heat collection plate 10 carries out the heat exchange with the cold air, can accelerate the heat exchange efficiency between first heat collection plate 10 and the air through a plurality of radiating fin 12, thereby the improvement once more to the inside thermal treatment effect of casing 1.

The working principle is as follows: when the stator 3 and the rotor 4 inside the casing 1 operate, the fan blades 9 may be driven to rotate, so as to cooperate with the air inlet 5 and the air outlet 6 to perform a preliminary ventilation heat dissipation treatment on the inside of the casing 1, and when the stator 3 and the rotor 4 operate, the heat inside the casing 1 may be concentrated and transferred to the first heat collecting plate 10 through the plurality of second heat collecting plates 11, and then heat exchange with the cold air outside the casing 1 through the periphery of the first heat collecting plate 10 is performed, so as to reduce the temperature inside the casing 1, thereby achieving the purpose of performing a further heat dissipation treatment on the inside of the casing 1, and while the first heat collecting plate 10 performs heat exchange with the cold air, the heat exchange efficiency between the first heat collecting plate 10 and the air may be accelerated through the plurality of heat dissipating fins 12, thereby further improving the heat dissipation treatment effect on the inside of the casing 1, and effectively avoiding the inside of the casing 1 from being in a continuous high temperature state on the whole, then, the motor is effectively prevented from being damaged integrally, the service life of the motor is prolonged, and the practicability is higher.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a heat radiation structure of motor for electric tool, includes casing (1) of motor, end cover (2) of motor, stator (3) of motor, rotor (4) of motor, the first heat radiation structure of motor, the second heat radiation structure of motor and the third heat radiation structure of motor, its characterized in that: the bottom of the shell (1) is provided with supporting legs, one side of the shell (1) is designed in an open mode, the end cover (2) is fixedly arranged at one side of the shell (1) which is designed in an open mode, the end cover (2) is provided with an air inlet (5), the shell (1) is provided with a plurality of air outlets (6) at one time when being far away from the end cover (2), the stator (3) is fixedly arranged at the inner wall of the shell (1), an output shaft (7) of the rotor (4) is movably arranged in the shell (1) through a bearing, the output shaft (7) of the rotor (4) penetrates through and extends to the outside of the shell (1), an extending shaft (8) is arranged at one side of the rotor (4) which is far away from the output end, the first heat dissipation structure is arranged at the output shaft (7) and the extending shaft (8), the second heat dissipation structure is arranged in the shell (1), and the second heat dissipation structure penetrates through the shell (1) and extends to the outer surface of the shell (1), and the third heat dissipation structure is arranged at the periphery of the outer part of the second heat dissipation structure.

2. The heat dissipation structure of a motor for a power tool according to claim 1, characterized in that: the first heat dissipation structure comprises two sets of fan blades (9), the two sets of fan blades (9) are fixedly mounted at the outer portions of the output shaft (7) and the extension shaft (8) respectively, and the two sets of fan blades (9) are located inside the shell (1).

3. The heat dissipation structure of a motor for a power tool according to claim 2, characterized in that: the wind directions of the fan blades (9) are consistent, and the wind directions of the fan blades (9) face the air outlet (6) of the shell (1).

4. The heat dissipation structure of a motor for a power tool according to claim 1, characterized in that: the second heat dissipation structure comprises a first annular heat collection plate (10) and a second arc-shaped heat collection plate (11), the first heat collection plate (10) is provided with two, two first heat collection plates (10) are fixedly arranged at the inner part of the shell (1), two first heat collection plates (10) are respectively located at two sides of the rotor (4), two first heat collection plates (10) penetrate through the shell (1) at the periphery and extend to the outer part of the shell (1), the second heat collection plate (11) is provided with a plurality of, two ends of the second heat collection plate (11) are respectively fixedly connected with the two first heat collection plates (10), and the second heat collection plate (11) is located between the stator (3) and the rotor (4).

5. The heat dissipation structure of a motor for a power tool according to claim 4, wherein: the first heat collecting plate (10) and the second heat collecting plate (11) are both made of copper materials.

6. The heat dissipation structure of a motor for a power tool according to claim 1, characterized in that: the third heat radiation structure comprises a plurality of heat radiation fins (12) made of copper materials, the heat radiation fins (12) are equally divided into two groups, and the heat radiation fins (12) are respectively fixedly arranged at the periphery of the outer parts of the two first heat collection plates (10) in an equidistant annular distribution mode.