Handheld brushless electric tool with outer rotor

Abstract

The invention discloses a handheld brushless electric tool with an outer rotor, and the handheld brushless electric tool comprises a shell and a working head, wherein the side end of the shell is provided with a groove; the groove is connected with the working head to form a ventilating cavity; the other side of the shell is provided with an accommodating cavity; the ventilating cavity is internally provided with a brushless motor; the brushless motor comprises a cylindrical rotor with an opening, a stator arranged in the opening of the rotor, a motor base and a magnet; the middle of the opening of the rotor is provided with a rotor shaft integrally connected to the rotor; the motor base is arranged between the rotor shaft and the stator; the motor base is connected with the rotor shaft through a bearing; the stator is fixed on the motor base; the magnet is fixed on the inner side wall of the rotor; the accommodating cavity of the shell is internally provided with an electronic speed regulator; and the electronic speed regulator is connected to the brushless motor. A way that the stator is arranged inside and the rotor is arranged outside is adopted in the handheld brushless electric tool, a torsion generated by the motor in such a way is larger than the original torsion, and the power output characteristic in such a way can accord with the various use habits of workers.

Description

technical field [0001] The invention relates to an electric tool, in particular to a hand-held external rotor brushless electric tool. Background technique [0002] Traditional brushed power tools have the problem of easy wear and tear of brushes. Brushless power tools adopt a brushless design in structure, so they are more durable than traditional brushed power tools. However, the current brushless power tools are different from traditional brushed power tools in terms of working characteristics. Some workers who have used traditional brushed power tools need an adaptation period when using brushless power tools. [0003] The structure of the motor used in the existing electric tools is that the stator is on the outside, the rotor is on the inside, the magnet is attached to the outer surface of the rotor, and the power is generated through the rotation of the rotor. This kind of motor has small torque, large volume, not durable and Heavier and other disadvantages. Conten...

AI Technical Summary

Problems solved by technology

However, the current brushless power tools are different from traditional brushed power tools in terms of working characteristics. Some workers who have used traditional brushed power tools need a period of adaptation when using brushless power tools.

[0003] The structure of the motor used in the existing electric tools is that the stator is on the outside, the rotor is on the inside, the magnet is attached to the outer surface of the rotor, and the power is generated through the rotation of the rotor. This kind of motor has small torque, large volume, not durable and heavier and other disadvantages

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