6 kinds of electric tools - Yuhuan Jingde Power Tool Co., Ltd.

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6 kinds of electric tools

Electric tools are mainly divided into metal cutting tools, electric tools, electric tools, electric tools, electric tools and electric tools. Common electric tools electric drill, electric grinder, electric wrench and electric screwdriver, hammer and impact drill, concrete vibrator, electric planer.
1, drill
The main specifications are 6, 8, 10, 13, 16, 19, 23, 32, 38, 4, 49mm, etc., and the number is the maximum diameter of the drill bit on the tensile strength of 390N/mm steel. The largest diameter of the hole diameter of the material, such as nonferrous metals, plastic, can be 30 to 50% of the original size.
2, electric power turbine
For grinding wheel or disc tool. A vertical electric wheel and electric angle grinder.
3, electric and electric screwdriver
Used for loading and unloading screw connection. The transmission mechanism of the electric wrench is composed of a planetary gear and a ball screw mechanism. Specifications are M8, M12, M16, M20, M24, M30, etc.. The electric screw driver uses the tooth embedded clutch transmission mechanism or the gear drive mechanism, the specification has M2, M3, M1, M4, M6, etc..
4, hammer and impact drills
For concrete, brick and building components on drilling, slotting, dehairing. Combined with the use of expansion bolts, can improve the installation speed and quality of all kinds of pipelines and machine tools.
5, concrete vibrator
Used to cast concrete foundation and reinforced concrete members of concrete, in order to eliminate the porosity, improve the intensity. The electric straight connecting type vibrator of high-frequency disturbance force by the motor drives the eccentric block to rotate and the formation of motor by 150Hz or 200 Hz medium frequency power supply.
6, Dianpao
Used to cut wood or wood structure, and can also be used as a small table in Taiwan. The planer cutter shaft by the motor shaft through the belt drive.
Electric tools safety protection
1, class I tool safety protection
The tool is provided with a grounding device, the insulation structure of the whole or most part of the basic insulation. If the insulation damage, due to the metal parts can be touched by grounding device and the installation of protective grounding in the fixed line (see grounding) or to protect the connection of the wire, not to become a charged body, can prevent the operator from electric shock.
2, class II tools security
The insulation structure of this type of instrument is composed of basic insulation and additional insulation, which is composed of double insulation or reinforced insulation. When the basic insulation is damaged, the operator is separated from the charged body by the additional insulation, which is not caused by an electric shock. Class II tools must be used to connect the power plug, which is not allowed.
3, class III tools security
This type of tool is powered by a safety voltage power supply. No load voltage between the safe voltage guide body or any one conductor and the ground is not more than 50V; on the three-phase power supply, the no-load voltage between the conductor and the middle line is less than 29V. Safety voltage is usually supplied by a safety isolating transformer or a converter with an independent winding. Set up protective earthing device is not allowed on the third class tool.
4, radio interference suppression
With the commutator of single-phase series excitation motor and DC motor will cause serious electromagnetic interference (EMI) on TV, radio, so electric tools in the design to consider Yang system of radio interference. The main use of the shield, the excitation winding symmetric connection, set up the electrical filter, filter, and other measures. When necessary, it is also connected with the small inductance coil at both ends of the motor armature.

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