Electric drill classification and role of the difference between the introduction

Electric drill can be divided into 3 categories: hand drill, impact drill, hammer drill.
1. Hand electric drill: The power is small, and the scope of use is limited to drilling wood and being used as an electric screwdriver. Some hand electric drills can be changed into special tools according to their uses, with many uses and models.
2. Impact drill: The impact mechanism of impact drill has two kinds of dog tooth type and ball type. Ball impact electric drill is composed of moving plate, fixed plate, steel ball, etc. The moving disc is connected with the main shaft through threads and carries 12 steel balls. The fixed disc is fixed on the casing by pins and carries 4 steel balls. Under the action of thrust, the 12 steel balls roll along the 4 steel balls to make the carbide drill produce rotary impact motion and can drill holes in brittle materials such as bricks, blocks and concrete. Disengage the pin to make the fixed plate rotate with the moving plate without impact, and it can be used as an ordinary electric drill.
3, hammer drill (electric hammer): can drill holes in a variety of hard materials, the use of a wide range.
The prices of these three kinds of electric drills are arranged from low to high, and their functions are also increased. The selection needs to be combined with their respective scope of application and requirements.
The difference between hand drill, impact drill, hammer drill and electric pick
The hand electric drill only relies on the motor to drive the transmission gear to increase the strength of the drill bit to rotate, so that the drill bit can be scraped on metal, wood and other materials.
When the impact drill is working, there is an adjustment knob at the bit chuck, which can be adjusted in two ways: drilling and impact drilling. However, the impact drill uses the gears on the inner shaft to beat each other to achieve the impact effect, and the impact force is far less than that of the electric hammer. It can also drill reinforced concrete, but the effect is not good.
The hammer drill (electric hammer) is different. It uses the bottom motor to drive two sets of gear structures, one to realize its drilling, and the other to drive the piston, just like the hydraulic stroke of the engine, producing a strong impact force, accompanied by the drilling effect. Strength can split stone and divide gold.
The electric pick is to let the motor drive the swinging weight to do the bouncing operation, so that the pick has the effect of chiseling the ground. The hydraulic pump pick uses the gas pressure transmitted by the air compressor to drive the pump hammer in the electric pick to bounce back and forth, thus producing the effect of the pick chiseling the ground, but the electric pick only chisels, and its pick does not rotate.
In a word, the electric drill can only drill, and the impact drill can also have a slight hammering effect. A hammer drill can drill and a higher hammer, while an electric pick can only do hammering and not drill.