- Oct 25, 2017 -
An electric rotary hammer drill with safety clutch with pneumatic hammer mechanism. Hammer is the use of compressed gas piston, impact drill bit, need not make much effort, can open 6--100mm in concrete, brick, stone and other hard materials on the hole hammer in the above-mentioned materials on the opening of high efficiency, but it is not a hole in the metal. The electric hammer comprises a motor, gear reducer, crank impact mechanism, rotational mechanism, overload protection device, power supply switch and a power supply device connecting part. Hammer principle is the driving mechanism to make rotation movement while the driven drill, hammer and reciprocating in a direction perpendicular to the rotor hammer motion. Hammer electrical fault, main circuit, short circuit, earthing, rotor commutator ring of big spark.
The electric hammer comprises a motor, gear reducer, crank impact mechanism, rotational mechanism, overload protection device, power supply switch and a power supply device connecting part.
The rotation motion of the motor is driven by the gear of the shaft shaft and the gear of the eccentric connecting rod and the rotating mechanism of the straight bevel gear pair, so as to obtain the required impact power and torque.
The impact motion is driven by the motor, and the eccentric link mechanism is driven by gears to make the piston in reciprocating motion in the cylinder liner, and the air cushion is formed between the piston and the impact piston at the same time. Because of the impact piston with a piston reciprocating compressor synchronous hammer drill pipe tail, so that the construction of drill hole. The air cushion is formed, and acts as a buffer when the rebound force.
The rotary drill is driven by the motor through a gear to drive a pair of straight bevel gears, so that the cylinder sleeve rotates with the six square sleeve through the overload protection device, and transmits torque to the drill rod. In this way, the composite motion of the impact belt is formed simultaneously with the impact mechanism. The main impact is, the rotation is auxiliary, and hammer and turn, so that the construction drill advancing, gradually into the required round hole.
Spring, steel ball, bowl washer etc. the overload protection device. When the torque exceeds a certain range (16ram, 18mm hammer is 15 ~ 25N - m, 22mm, 24mm hammer is 20 ~ 35N - M), torque rotating sleeve, press the steel ball through its six semicircular concave hole, the radial ball pops up, the bowl washer compression spring to a certain distance, to set the and the cylinder liner disengaged. At this time, although the motor is rotating, the drill pipe has not turned. This can provide protection for the hard and soft concrete, uneven loose or improper use of the drill pipe, jamming the operator's wrist and burning the motor.
Many design electric hammer drill card, it is a device for quick dismounting drill pipe. Install the electric hammer drill, drill hole will only need to plug a roller that can be loaded back. At this point, the drill sleeve is automatically reset by the spring, and the roller is pushed into the small diameter of the drill pipe, and the drill pipe is stuck. Remove the electric hammer drill, the drill sleeve pulled back, can put the drill exit.
Design and manufacture of a hammer type hammer. Additional pairs of stator insulation, electric hammer size (26mmll2[) because the motor shell is Aluminum Alloy castings, so by setting the insulating bushing structural problems in the enclosure with the stator core, the small size electric rust (such as 18ram) using plastic shell structure. Rotor additional insulation adopts rotating shaft insulation structure.
The power switch, using seismic hammer hand press type self lock reset switch.
The electric power line using soft cable rubber sheathed cable, power plug and soft rubber cable is compressed into a whole, is not to be connected to power plug.
Drill operating tools impact drill and electric hammer. Impact drill with a drill called "drill"; electric hammer drill bit for said. Electric hammer drill. They are collectively referred to as construction drills.
The cutting edges of construction drills are made of high quality carbide inserts. YG8 tungsten carbide drill, electric hammer drill with YGll tungsten carbide. The drill body material, with other steel 45 steel or equivalent performance impact drill shank, heat treatment, hardness of not less than HRC35; hammer drill shank with 40Cr steel, heat treatment, hardness of not less than HRC40.