WO2023004840A1

WO2023004840A1 - Constant-rotational speed heat dissipation motor for electric tool

Info

Publication number: WO2023004840A1
Application number: PCT/CN2021/110223
Authority: WO
Inventors: 侯亮
Original assignee: 扬州仁智信息科技有限公司
Priority date: 2021-07-29
Filing date: 2021-08-03
Publication date: 2023-02-02
Also published as: CN215419958U

Abstract

A constant-rotational speed heat dissipation motor for an electric tool, comprising a motor body (1). A transmission shaft (2) is fixedly connected to a transmission end of the motor body; a heat dissipation grid (3) is fixedly mounted at the middle of the motor body (1); a top cover (4) is fixedly mounted at the upper end of the motor body (1); a heat dissipation net (5) is fixedly mounted at the upper end of the top cover (4); a first rotor (6) is movably mounted at the lower end of the interior of the motor body (1); a bearing (7) is fixedly mounded at the upper end of the first rotor (6); and a second stator (8) is fixedly mounted at the upper end of the interior of the motor body. According to the constant-rotational speed heat dissipation motor for the electric tool, internal double-shaft transmission is utilized, such that when the motor body is loaded, a heat dissipation fan can be driven by the second rotor to rotate at an original rotation number, an internal heat dissipation fan continuously rotates at a constant rotation number for heat dissipation, and the situation that a heat dissipation effect becomes poor as a result of the reduction of the rotation number of the motor due to the load is avoided; and the heat dissipation effect is effectively improved.

Description

A constant speed cooling motor for electric tools

technical field

The utility model relates to the technical field of electric tools, in particular to a heat dissipation motor with constant speed for electric tools.

Background technique

An electric tool is a mechanized tool, which is powered by a motor or an electromagnet, and drives the working head through a transmission mechanism to perform operations. It is usually made into a hand-held and movable type. It can improve production efficiency several times to dozens of times, and electric tools have been widely used in various fields of the national economy, and have entered home use.

During the use of the previous electric tools, the internal heat dissipation fan rotates with the rotation of the internal motor rotor, resulting in a higher rotation speed of the motor when idling and good heat dissipation effect. The cooling effect of the fan becomes worse, and the cooling fan cannot rotate at a constant speed, resulting in reduced practicability.

Utility model content

(1) Solved technical problems

Aiming at the deficiencies of the prior art, the utility model provides a constant-speed heat-dissipating motor for electric tools to solve the defects and problems raised in the above-mentioned background technology. By using the internal biaxial transmission, the heat-dissipating fan can be used when the motor body is under load. Driven by the second rotor, the original number of rotations is maintained, and the internal cooling fan is continuously rotated at a constant number of rotations to dissipate heat, avoiding the deterioration of the heat dissipation effect caused by the decrease in the number of rotations of the motor due to the load, and effectively improving the heat dissipation effect .

(2) Technical solution

In order to achieve the above object, the utility model provides the following technical solutions: a constant speed heat dissipation motor for electric tools, including a motor body, the transmission end of the motor body is fixedly connected with a transmission shaft, and the middle part of the motor body is fixedly installed with a heat dissipation motor. grid, the upper end of the motor body is fixedly installed with a top cover, the upper end of the top cover is fixedly installed with a cooling net, the lower end inside the motor body is movably installed with a first rotor, and the upper end of the first rotor is fixedly installed There are bearings, the upper end inside the motor body is fixedly installed with a second stator, the inside of the second stator is movably installed with a second rotor, and the lower end of the second rotor is fixedly installed with a drive shaft, and the drive shaft The outer end of the middle part is fixedly installed with a permanent magnet, the upper end of the second rotor is fixedly installed with a drive shaft two, the middle part of the drive shaft two is fixedly equipped with an anti-deflection wheel, and the upper end of the drive shaft two is fixedly installed with a first As for the heat dissipation fan, a connecting shaft is fixedly mounted on the lower end of the drive shaft one, a second heat dissipation fan is fixedly mounted on the middle part of the connecting shaft, and a first stator is fixedly mounted on the lower end inside the motor body.

Preferably, the second rotor is of the same structure as the first rotor, the first stator is of the same structure as the second stator, the first rotor and the second rotor maintain the same rotational torque, and the force load on the first rotor , the second rotor maintains the original rotation speed for rotation.

Preferably, the permanent magnet is fixed around the outer end of the middle part of the drive shaft, the first cooling fan is located inside the top cover, and the permanent magnet is driven by the magnetic force when the second stator is energized to generate a magnetic field The axis rotates.

Preferably, the lower end of the connecting shaft is fixedly connected with a bearing, the second cooling fan is located inside the cooling grid, and the connecting shaft and the first rotor can rotate coaxially and at different speeds by installing the bearing.

Preferably, the second cooling fan has the same structure as the first cooling fan, the first rotor and the second rotor rotate coaxially, and the first rotor and the second rotor can be rotated in the middle of the motor body by installing the second cooling fan. The first stator performs heat dissipation.

Preferably, the connecting shaft is movably connected to the first rotor through a bearing, and the heat dissipation grid and the heat dissipation net are in a communication structure, and communicate with the heat dissipation net through the heat dissipation grid, so that during heat dissipation, the internal hot air flow can be The rapid flow inside the motor body has achieved the effect of rapid cooling.

Compared with the prior art, the utility model provides a constant speed cooling motor for electric tools, which has the following beneficial effects:

1. The power tool uses a constant speed heat dissipation motor, which uses internal biaxial transmission, so that when the motor body is under load, the heat dissipation fan can maintain the original rotation speed driven by the second rotor, and the internal heat dissipation fan can be rotated at a constant speed. Continuous rotation for heat dissipation avoids the deterioration of the heat dissipation effect caused by the decrease in the number of revolutions of the motor due to the load, and effectively improves the heat dissipation effect;

2. The power tool uses a constant-speed heat-dissipating motor, and the shaft ends are connected through bearings, so that the motor transmission rotor and the heat-dissipating rotor rotate separately, so that the transmission rotor saves part of the rotational torque that drives the heat-dissipating fan, reducing the output power of the motor, effectively Improve the energy-saving performance of the motor;

3. The electric tool uses a constant speed heat dissipation motor. By installing the second heat dissipation fan in the middle of the motor body, it can dissipate heat between the first rotor and the first stator, and at the same time increase the flow speed of the air inside the motor body. Further improved heat dissipation performance.

Description of drawings

Fig. 1 is the three-dimensional structure schematic diagram one of the utility model;

Fig. 2 is the three-dimensional structure schematic diagram two of the utility model;

Fig. 3 is a schematic diagram of the three-dimensional structure of the second stator of the utility model;

Fig. 4 is a schematic diagram of the three-dimensional structure of the second rotor of the present invention.

Among them: 1. Motor body; 2. Transmission shaft; 3. Heat dissipation grid; 4. Top cover; 5. Heat dissipation net; 6. First rotor; 7. Bearing; 8. Second stator; 9. Second rotor; 10. Permanent magnet; 11. Drive shaft one; 12. Drive shaft two; 13. Anti-deflection wheel; 14. First cooling fan; 15. Connecting shaft; 16. Second cooling fan; 17. First stator.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. example. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

Please refer to Figures 1-4, the utility model provides a technical solution: a constant speed heat dissipation motor for electric tools, including a motor body 1, the transmission end of the motor body 1 is fixedly connected with a transmission shaft 2, and the middle part of the motor body 1 is fixed A heat dissipation grid 3 is installed, a top cover 4 is fixedly installed on the upper end of the motor body 1, a heat dissipation net 5 is fixedly installed on the upper end of the top cover 4, and a first rotor 6 is movably installed on the lower end of the inside of the motor body 1. A bearing 7 is fixedly installed on the upper end, a second stator 8 is fixedly installed on the upper end of the motor body 1, a second rotor 9 is installed movably inside the second stator 8, and a drive shaft 11 is fixedly installed on the lower end of the second rotor 9. The outer end of the middle part of the shaft one 11 is fixedly installed with a permanent magnet 10, the upper end of the second rotor 9 is fixedly installed with a drive shaft two 12, and the middle part of the drive shaft two 12 is fixedly installed with an anti-deflection wheel 13, and the upper end of the drive shaft two 12 is fixedly installed There is a first cooling fan 14, a connecting shaft 15 is fixedly mounted on the lower end of the drive shaft one 11, a second cooling fan 16 is fixedly mounted on the middle part of the connecting shaft 15, and a first stator 17 is fixedly mounted on the lower end of the motor body 1 inside.

Further, the second rotor 9 has the same structure as the first rotor 6, and the first stator 17 has the same structure as the second stator 8. First, the motor body 1 is powered on, and the first stator 17 inside the motor body 1 is connected to the The second stator 8 is energized to generate a magnetic field, and the inner first rotor 6 and the permanent magnet 10 at the outer end of the second rotor 9 generate a rotational torque to rotate under the action of magnetic force, and the second rotor 9 drives the first cooling fan 14 and the second rotor while rotating. The two heat dissipation fans 16 rotate in the same direction. When the first heat dissipation fan 14 and the second heat dissipation fan 16 rotate, the airflow inside the motor body 1 is driven to blow to the outside of the motor body 1, and the inside of the motor body 1 is radiated and cooled. The rotor 6 and the connecting shaft 15 are connected by the bearing 7, so that the first rotor 6 and the second rotor 9 rotate coaxially but do not interfere with each other. When the first rotor 6 is idling, the first rotor 6 and the second rotor 9 to maintain the same rotational torque, when the first rotor 6 is subjected to a force load, the second rotor 9 rotates at the original speed, and continuously drives the first heat dissipation fan 14 and the second heat dissipation fan 16 to dissipate heat.

Further, the permanent magnet 10 is fixed around the outer end of the middle part of the drive shaft 11, and the first cooling fan 14 is located inside the top cover 4. When the permanent magnet 10 is energized to generate a magnetic field in the second stator 8, the permanent magnet 10 is subjected to a magnetic force. The effect drives the drive shaft one 11 to rotate.

Further, the lower end of the connecting shaft 15 is fixedly connected with the bearing 7, and the second heat dissipation fan 16 is positioned at the inside of the heat dissipation grid 3, and the connecting shaft 15 and the first rotor 6 can be rotated coaxially and at different speeds by installing the bearing 7.

Further, the second cooling fan 16 has the same structure as the first cooling fan 14, and the first rotor 6 and the second rotor 9 rotate coaxially. The rotor 6 and the first stator 17 perform heat dissipation.

Further, the connecting shaft 15 is movably connected with the first rotor 6 through the bearing 7, and the heat dissipation grid 3 and the heat dissipation net 5 are in a communication structure, and are communicated with the heat dissipation net 5 through the heat dissipation grid 3, so that the internal heat The air flow can flow quickly inside the motor body 1 to achieve the effect of rapid cooling.

When in use, first connect the motor body 1 to the power supply, the first stator 17 and the second stator 8 inside the motor body 1 are energized to generate a magnetic field, and the permanent magnet 10 at the outer end of the first rotor 6 and the second rotor 9 inside the motor body 1 Rotation torque is generated under the action of the second rotor 9 to rotate, and the second rotor 9 drives the first heat dissipation fan 14 and the second heat dissipation fan 16 to rotate in the same direction, and the first heat dissipation fan 14 and the second heat dissipation fan 16 rotate while driving the motor body 1, the air flow inside blows to the outside of the motor body 1 to dissipate heat and cool down the inside of the motor body 1, and at the same time, the first rotor 6 and the connecting shaft 15 are connected through the bearing 7, so that the first rotor 6 and the second rotor 9 are in a Coaxial rotation does not interfere with each other. When the first rotor 6 is idling, the first rotor 6 and the second rotor 9 maintain the same rotational torque. When the first rotor 6 is stressed, the second rotor 9 maintains the original rotation speed. Rotate to continuously drive the first heat dissipation fan 14 and the second heat dissipation fan 16 to dissipate heat.

Although the embodiments of the present invention have been shown and described, those skilled in the art can understand that various changes and modifications can be made to these embodiments without departing from the principle and spirit of the present invention , replacements and modifications, the scope of the present utility model is defined by the appended claims and their equivalents.

Claims

A constant speed cooling motor for electric tools, comprising a motor body (1), characterized in that: the transmission end of the motor body (1) is fixedly connected with a transmission shaft (2), and the middle part of the motor body (1) is fixed A heat dissipation grid (3) is installed, a top cover (4) is fixedly installed on the upper end of the motor body (1), a heat dissipation net (5) is fixedly installed on the upper end of the top cover (4), and the motor body ( 1) A first rotor (6) is movably installed at the lower end inside, a bearing (7) is fixedly installed at the upper end of the first rotor (6), and a second stator ( 8), the inside of the second stator (8) is movably installed with a second rotor (9), and the lower end of the second rotor (9) is fixed with a drive shaft one (11), and the drive shaft one (11 ) is fixedly mounted with a permanent magnet (10) at the outer end of the middle part, the upper end of the second rotor (9) is fixedly mounted with a drive shaft two (12), and the middle part of the drive shaft two (12) is fixedly mounted with an anti-deflection wheel (13), the upper end of the drive shaft two (12) is fixedly equipped with a first cooling fan (14), the lower end of the drive shaft one (11) is fixedly equipped with a connecting shaft (15), and the connecting shaft (15 ) is fixedly installed with a second cooling fan (16), and the lower end inside the motor body (1) is fixedly installed with a first stator (17).
A constant speed heat dissipation motor for electric tools according to claim 1, characterized in that: the second rotor (9) and the first rotor (6) have the same structure, and the first stator (17) and The second stator (8) has the same structure.
A constant speed cooling motor for electric tools according to claim 1, characterized in that: the permanent magnet (10) is fixed around the outer end of the middle part of the drive shaft one (11), and the first cooling fan (14) is located inside the top cover (4).
A constant speed heat dissipation motor for electric tools according to claim 1, characterized in that: the lower end of the connecting shaft (15) is fixedly connected to the bearing (7), and the second heat dissipation fan (16) is located in the heat dissipation grid The interior of the net (3).
A constant speed heat dissipation motor for electric tools according to claim 1, characterized in that: the second heat dissipation fan (16) has the same structure as the first heat dissipation fan (14), and the first rotor (6) It rotates coaxially with the second rotor (9).
A constant speed heat dissipation motor for electric tools according to claim 1, characterized in that: the connecting shaft (15) is movably connected to the first rotor (6) through a bearing (7), and the heat dissipation grid (3 ) and the cooling net (5) are connected structures.