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Title:
ELECTRIC TOOL AND CONTROL DEVICE THEREOF
Document Type and Number:
WIPO Patent Application WO/2019/062990
Kind Code:
A1
Abstract:
An electric tool comprises a motor (1), an output shaft (2), a motion conversion mechanism, a control switch (30), a control assembly (50). The output shaft is in matching connection with a working head (21). The motion conversion mechanism is connected to the motor and the output shaft, and can convert rotary motions of the motor into axial impacts and transmits the axial impacts to the working head. The control switch is used for switching off or on an electrical connection between a power source (10) and the motor. The control mechanism (50) comprises a controller (51) and an electronic switch (52). The electronic switch is located between the motor and the controller. The controller controls ON and OFF of the electronic switch to intermittently control a characteristic variable reflecting the working state of the motor, so that the working head of the electric tool performs intermittent impacts, the effects of the intermittent impacts are same as effects obtained when operations for switching on or off the control switch are repeatedly performed, and power supply to the motor is intermittently changed. The intermittent impacts of the working head of the electric tool effectively reduces harmful loss imposed by the electric tool on surfaces of ceramic tiles, and accordingly, the situation of break of ceramic tiles due to the effect of continuous acting force on the ceramic tile during hole drilling is avoided. The present invention also relates to a control device for the electric tool.

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Inventors:
SUN, Jinglong (No. 18 Dongwang Road, Industrial ParkSuzhou, Jiangsu 3, 215123, CN)
ZHU, Boyuan (No. 18 Dongwang Road, Industrial ParkSuzhou, Jiangsu 3, 215123, CN)
WU, Hongbing (No. 18 Dongwang Road, Industrial ParkSuzhou, Jiangsu 3, 215123, CN)
ZHANG, Chuanbing (No. 18 Dongwang Road, Industrial ParkSuzhou, Jiangsu 3, 215123, CN)
ZHU, Hang (No. 18 Dongwang Road, Industrial ParkSuzhou, Jiangsu 3, 215123, CN)
Application Number:
CN2018/108843
Publication Date:
April 04, 2019
Filing Date:
September 29, 2018
Export Citation:
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Assignee:
POSITEC POWER TOOLS (SUZHOU) CO., LTD (No. 18 Dongwang Road, Industrial ParkSuzhou, Jiangsu 3, 215123, CN)
International Classes:
B25D11/00; B25D16/00
Foreign References:
CN102639301A2012-08-15
CN104334320A2015-02-04
CN102300677A2011-12-28
US20050194165A12005-09-08
US3867988A1975-02-25
US5531278A1996-07-02
Attorney, Agent or Firm:
SHANGHAI ESSEN PATENT & TRADEMARK OFFICE (Room 2718, No. 1958 Zhongshan N Rd.Putuo, Shanghai 3, 200063, CN)
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