Electric drill is a drilling machine that uses electricity to do the power. Is the power tool in the conventional products, but also the largest demand for power tool products. The annual production and sales account for 35% of China's power tools.
The working principle of electric drill is electromagnetic rotary or electromagnetic reciprocating small capacity motor motor rotor to do magnetic field cutting to do work operation, through the transmission mechanism to drive the operating device, drive the gear to increase the power of the drill, so that the drill scrapes the surface of the object, better piercing the object.
Electric drill can be divided into 3 types: hand electric drill, hammer drill, hammer drill.
1. Electric drill: the minimum power, the scope of use is limited to drill wood and when an electric screwdriver, part of the electric drill can be changed into special tools according to the use, use and model more
2. Impact drill: The impact mechanism of impact electric drill has two kinds: canine type and ball bearing type. Ball bearing electric impact drill is composed of moving disc, fixed disc, steel ball, etc. The moving disc is connected with the spindle through threads, and has 12 steel balls; The fixed plate is fixed on the housing with pins, and has 4 steel balls. Under the action of thrust, 12 steel balls roll along the 4 steel balls, so that the carbide drill bit produces rotary impact movement, and can drill holes on brittle materials such as bricks, blocks and concrete. Take off the pin, so that the fixed plate with the disk rotation, no impact, can be used as an ordinary electric drill.
3 hammer drill (electric hammer) : can drill holes in a variety of hard materials, the widest range of use.
These 3 kinds of electric drill price from low to high arrangement, the function also increases, the selection needs to combine the respective scope of application and requirements.
The difference between electric drill, hammer drill, hammer drill and electric pick
The electric drill only relies on the motor to drive the transmission gear to increase the strength of the drill bit rotation, so that the drill bit in metal, wood and other materials to do scraping form piercing.
When the hammer drill is working, there is an adjusting knob at the bit chuck. There are two ways: adjustable drill and hammer drill. But the impact drill uses the gears on the inner shaft to beat each other to achieve the impact effect, the impact is far less than the electric hammer. It can also drill steel concrete, but it is not as effective.
Hammer drill (electric hammer) is different, it is the use of the bottom motor to drive two sets of gear structure, one set to achieve it, and the other set to drive the piston, like the engine hydraulic stroke, produce a powerful impact, accompanied by the effect of drilling. Power can divide gold from stone.
The electric pick is to let the motor drive the throwing weight do bouncing form run, so that the pick has the effect of gouging the ground. Hydraulic pump pick is the use of air compressor transmission of gas pressure to drive the pump hammer in the pick to bounce back, so as to produce the effect of picking the ground, but the electric pick only chisel, its pick does not rotate.
In short, the electric drill can only drill, and the impact drill can also have a slight hammering effect. Hammer drill can drill and high hammer, electric picks only do hammer but not drill.
