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DC brushless motor

A technology for brushless DC motors and circuit substrates, which is applied to electrical components, electromechanical devices, etc., can solve problems such as decreased productivity, and achieve the effects of improving productivity, dust resistance and water resistance.

Inactive Publication Date: 2016-06-22
MAX CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the resin coating process is manual work, resulting in decreased productivity

Method used

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  • DC brushless motor
  • DC brushless motor
  • DC brushless motor

Examples

Experimental program
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Embodiment 1

[0018] Below, refer to Figure 1 to Figure 3 Preferred embodiments of the present invention will be described. First, the structure of the brushless DC motor according to this embodiment will be described. Such as figure 1 and image 3 As shown, the DC brushless motor 1 is mainly composed of the following components: a motor main body 5, which includes a stator 3 having a plurality of driving coils 2, ... and a magnetic rotor 4 rotatably arranged at the inner center of the stator 3 The drive circuit substrate 7 is integrally mounted on the motor body 5 via a plurality of bracket members 6 protruding from one side of the motor body 5 . . .

[0019] The above-mentioned stator 3 is constituted by winding the driving coils 2 respectively on the bobbins 9 made of an insulating material attached to the portions of the magnetic cores 8 . The magnetic rotor 4 is fixed to an output shaft 10 , and the output shaft 10 is rotatably supported by ball bearings 11 , 11 . A portion of th...

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PUM

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Abstract

An object of the present invention is to provide a brushless DC motor with improved dustproofness and waterproofness while improving productivity. In order to achieve the above object, the present invention provides the following brushless DC motor, which is integrally mounted with a drive circuit board (7) on the bracket part (6) protruding from the side of the motor body (5), the drive circuit board (7) A drive circuit (12) for switching currents to a plurality of drive coils (2, ...) is installed, wherein a substrate housing (13) corresponding to the drive circuit substrate (7) in shape and size is provided, so as to Insert the drive circuit substrate (7) in the combined state into the substrate case (13) in such a way that the bracket member (6) is in the required installation form, and use the solidified resin that is dropped into the substrate case (13) and solidified. The potting material integrally mounts the drive circuit substrate (7) on the bracket member (6).

Description

technical field [0001] The present invention relates to a DC brushless motor (DC brushless motor), and in particular to a DC brushless motor which is used in electric tools such as an impact driver and which improves dustproofness and water resistance while improving productivity. Background technique [0002] In general, electric tools such as impact drivers use a motor that operates by being powered by a battery as a rotational drive source. As prior art having such a motor, the following electric tools are known, for example. In the prior art described above, a motor is built into the cylindrical body portion of the housing, and the motor is powered by a battery housed in the battery pack. An opening for cooling the motor is formed through the casing of the main body. A battery pack mounting portion is formed protruding forward at the lower end of the handle portion extending downward from the main body portion, and a circuit housing portion is provided near the forward...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02K29/00
Inventor 坂卷一弥
Owner MAX CO LTD