The
Electric Screwdriver is suitable for screw connection firm or disassembly in mechanical assembly, construction and other industries. The single-phase series-excited screwdriver is composed of a single-phase series-excited motor, gear reducer, clutch device, screwdriver head and protective cover, forward and reverse power switch and power connection device.
The electric screwdriver clutch device is composed of a jaw clutch, a pressure spring, an adjusting nut, and a main shaft with a screwdriver bit. The rotary motion of the screwdriver bit is decelerated by the motor through the secondary gear, and then drives the hollow shaft to rotate. The front end of the hollow shaft is the active part of the jaw clutch. After the motor is started, the hollow shaft rotates without load and the screwdriver bit is stationary.
When the screwdriver bit is axially compressed, the hollow shaft spring compresses, so that the teeth on the end face of the clutch follower engage with the teeth of the clutch driver at the front end of the hollow shaft, so that the steel ball of the jaw clutch is integrated with the screwdriver bit. The screwdriver bit Also rotate together, you can tighten or remove the screws. After the jaw clutch is engaged, the torque is transmitted by the three steel balls in the middle.
When working, if the required torque is reached or the torque is too large, the jaw clutch follower compresses the spring, and slips away from the driver and follower of the jaw clutch to prevent thread damage and motor overload. The adjusting nut is used to adjust the output torque of the screwdriver bit. Through the working spring, the pressing force of the follower of the jaw clutch is adjusted to ensure the smooth separation of the jaw clutch under a certain torque.
The torque can be achieved by turning the adjusting nut. If the adjusting nut rotates in the direction of the jaw clutch, the spring is compressed and the transmission torque is large; if the adjusting nut rotates in the opposite direction of the jaw clutch, the spring force is small and the transmission torque is also small. The screw tightening torque can be adjusted according to the above method, so that there is a stable clamping force between the screw and the workpiece, so as to ensure the assembly quality of the screw and the workpiece.
