What is the structure of the hammer is
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 rotary drill is driven by an electric motor through a gear to drive a pair of straight bevel gears, so that the cylinder sleeve rotates with the six square sleeve through an overload protection device and transmits torque to the drill rod. Thus, the composite motion of the impact belt is formed simultaneously with the impact mechanism. The impact is the main, the rotation is secondary, and the hammer is turned again, so that the construction drill is pushed forward and gradually becomes the required circular 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 moment, although the motor is rotating, the drill rod has not turned. In this way, the utility model can provide protection for the hard and soft of the concrete, the uneven or uneven use of the drill pipe, the jamming of the drill rod, the wrench of the operator's wrist and the burning of the motor, etc..
The impact motion is driven by the motor to rotate, and the eccentric connecting rod mechanism is driven by the gear to cause the piston to reciprocate in the cylinder liner, meanwhile, the air cushion is generated between the piston and the impact piston. 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 rotating motion of the motor is composed of a shaft, a shaft, a gear and an engaging gear, and the transmission mechanism of the eccentric connecting rod impact mechanism and the straight bevel gear pair is respectively driven to obtain the required impact power and torque.
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.
