An internal heat dissipation brushless DC motor and a hand-held lithium battery tool

A brushless DC motor, heat dissipation technology, applied in the direction of electric components, electromechanical devices, electrical components, etc., can solve the problems of poor timeliness, poor reliability, accelerated aging of wires and electronic components, etc., to achieve lubrication effect and simplify internal Better structure, dustproof and noise reduction effect

Active Publication Date: 2022-03-11
ZHEJIANG MINLI POWER TOOLS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, overload protection through thermal protection has the following disadvantages: temperature rise will lead to accelerated aging of wires and electronic components, poor timeliness, and poor reliability

Method used

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  • An internal heat dissipation brushless DC motor and a hand-held lithium battery tool
  • An internal heat dissipation brushless DC motor and a hand-held lithium battery tool
  • An internal heat dissipation brushless DC motor and a hand-held lithium battery tool

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Embodiment Construction

[0046] refer to Figure 1-7 As shown, it is a specific embodiment of the present invention: an internal heat dissipation brushless DC motor, including a rotor 1, the rotor 1 includes a rotating shaft 2, a rotor core 3 covering the middle of the rotating shaft 2, and a commutator 4 , gasket 5; stator 6, the stator 6 is sleeved on the outside of the rotor core 3, the stator 6 includes the stator core 7 and stator windings; the first cooling oil storage tank 9, the first cooling oil storage tank 9 Including the first oil outlet; the second cooling oil storage tank 10, the second cooling oil storage tank 10 includes the first oil inlet; the first bearing 11, the first bearing 11 is installed on the second shaft 2 end-to-end (i.e. figure 1 The right end of the rotating shaft 2), the inner ring follows the rotation of the rotating shaft 2, and the outer ring is fixed on the carrier; the second bearing 12, the second bearing 12 is installed on the second end of the rotating shaft 2 ...

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Abstract

The invention discloses an internal cooling type DC brushless motor and a hand-held lithium electric tool. Located on the outside of the rotor core, the stator includes a stator core and a stator winding; a first cooling oil storage tank and a second cooling oil storage tank; the first cooling oil storage tank is connected to the stator core and the rotating shaft respectively, and is connected to The second cooling oil storage tank; the rotating shaft is provided with a penetrating oil channel, and a first oil circuit opening and closing device and a second oil circuit opening and closing device are provided at both ends of the rotating shaft. High can realize the automatic switching of the opening and closing state of the oil circuit, so as to realize the automatic heat dissipation of the motor. The motor does not need to be equipped with a fan and other heat dissipation components, and the hand-held lithium electric tool using this motor does not need to open a heat dissipation port, which simplifies the internal structure. At the same time, the effect of dust and noise reduction is better.

Description

technical field [0001] The invention relates to the technical field of brushless motors, in particular to an internal cooling type DC brushless motor and a hand-held lithium electric tool using the brushless motor. Background technique [0002] The brushless DC motor is a kind of synchronous motor. The speed of the motor rotor is affected by the speed of the rotating magnetic field of the motor stator and the number of poles (P) of the rotor: n=60* f / P. When the number of poles of the rotor is fixed, changing the frequency of the stator's rotating magnetic field can change the speed of the rotor. A brushless DC motor is a synchronous motor with an electronic control (controller) to control the frequency of the stator's rotating magnetic field and feed back the speed of the motor's rotor to the control center for repeated corrections, in order to achieve a method close to the characteristics of a DC motor. That is, the brushless DC motor can control the motor rotor to mainta...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02K1/32H02K1/20H02K9/193H02K5/16H02K29/00
CPCH02K1/32H02K1/20H02K9/193H02K5/161H02K29/00
Inventor 徐峰朱明亮王宾
Owner ZHEJIANG MINLI POWER TOOLS CO LTD
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