A safety extra-low voltage generating device and electric tool

A safety extra-low voltage, generating device technology, applied in manufacturing tools, portable mobile devices, AC/AC converters, etc., can solve the problems of difficulty in finding the installation location, inability to determine whether the motor is working normally, and high cost, achieving a simple structure. , low cost, easy to use effect

Active Publication Date: 2017-09-22
有维科技(苏州)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Of the above three methods, method one is only suitable for hand-held electric tools with all-plastic shells, method two and three are costly, and it is difficult to find a suitable installation position, and methods one and two have the defect that it is impossible to judge whether the motor is working normally

Method used

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  • A safety extra-low voltage generating device and electric tool
  • A safety extra-low voltage generating device and electric tool
  • A safety extra-low voltage generating device and electric tool

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Embodiment Construction

[0022] Such as Figure 1 to Figure 3 As shown, the present invention is described in detail by taking an electric tool as an example. The main parts of the electric tool include a power cord 1, a cable sheath 2, a plastic casing 3, a switch 4, a motor brush 5, a stator assembly 6, and a rotor assembly 7. Metal shell 9, LED lamp 10, etc., wherein, stator assembly 6 includes stator lead wire 601, stator winding 602, stator core 603, stator winding basic insulation 604; rotor assembly 7 includes rotor commutator 701, rotor winding 702, etc. . The above is also a common structure of electric tools in the prior art, and will not be repeated here.

[0023] The feature of the present invention is that there is also a transformer secondary 8, the transformer secondary 8 is installed in the gap between the stator windings 602, and the stator winding 602 is used as the transformer primary to form a transformer, which supplies power for extra-low voltage electrical appliances, especiall...

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PUM

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Abstract

The invention discloses a safety extra-low voltage generating device and an electric tool. The electric tool includes a casing and a motor installed in the casing. LED lamps are installed on the casing. The motor includes a stator winding, and the stator winding of the motor is used as the The transformer primary is also provided with a transformer secondary, and the safety extra-low voltage output by the transformer secondary is output to the LED lamp through the secondary lead wire. The invention uses the alternating magnetic field of the stator on the hand-held electric tool to generate a safe extra-low voltage, and uses it to provide low-voltage LED lighting, which is convenient for night work or judges whether the hand-held electric tool is working normally according to whether the brightness of the LED light is stable, and has a simple structure. Suitable for various electric tools, easy to use and low cost.

Description

technical field [0001] The invention relates to electric tools, in particular to electric tool lighting power supply and motor fault judgment. Background technique [0002] Low-voltage LED lights installed on hand-held electric tools inevitably need lead wires to transmit electricity. Lead wires generally pass through housings that may be made of engineering plastics, metal or other materials, but one thing is for sure, no matter How to arrange the lead wires, the material of the shell, and the hand-held electric tools must meet the requirements of GB3883.1 "Safety of Hand-held Electric Tools". [0003] There are three traditional methods. The first method is to use the electrical schematic Figure 4 The electronic components shown are provided with a power switch 1b, a stator assembly 2b, a brush 3b, a rotor assembly 4b, and an LED lamp 5b. The working voltage of the LED lamp is extracted from the mains through the resistance-capacitance step-down to obtain the lighting cu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02K47/20B25F5/00
Inventor 郑振宇
Owner 有维科技(苏州)有限公司
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