Abstract: A magnetic levitation screw-clamping jaw for automatic screwdrivers. The main feature is a configuration of a magnetic levitation clamping jaw on the front end of the screwdriver bit of an automatic screwdriver. The structure and working principle of the invention include: (1) through pneumatic control, clamp the screw at air intake, and through electromagnetic control, release the screw at air exhaust, meanwhile complete the locking action straightforward with the automatic screwdriver; and with electric power input, the electromagnet can absorb the screw; (2) through the relative displacement with the automatic screwdriver, push the magnet, and as like poles repel, the repulsion force will push the displacement to clamp the screw to immediately conduct the locking action; (3) through the relative displacement with the automatic screwdriver, push the switch to control the magnet excitation of the magnetic chuck to absorb and clamp the screw for the screw-locking action.

Abstract: A two-stage locking electric screwdriver, with its main improved features as follow: the electric screwdriver has pre-locking and locking functions; the torque settings of the electric screwdriver can be easily modulated, and meanwhile the torque accuracy and energy efficiency can be improved; the torque modulation type is external modulation, so that the torque modulation can be carried out externally and even the torsion spring can be replaced. Meanwhile, the component structures inside the electric screwdriver is improved through a design that the motor directly drives the clutch and then drive the screwdriver head unit, and that an internal gear clutch is used to replaced the gear unit and clutch unit, so that the number of parts is dramatically reduced to save production cost. During general rotation, the electric screwdriver will not drive the clutch unit, and when the torque jumps to the set value, the internal gear clutch rotates and generates a torque.

Abstract: A magnetic levitation brake motor, which is very applicable to automatic screwdrivers. A motor providing power output is combined with a magnetic levitation clutch, the alternating effect of homopolar repulsion and heteropolar attraction in the operation of the magnetic levitation clutch can reduce the motor starting current, and the motor has less inertia moment and friction force, reducing the heating and damage of MOSFET controlling drive motor current. In the operation, the magnetic levitation clutch runs when the motor is started, and the inertia moment is increased and the kinetic energy is accumulated. Under a load, the rotation speed of the magnetic levitation clutch decreases and kinetic energy is released to increase the torque. The motor stops when the preset torque is reached. The magnetic levitation clutch keeps running due to inertia moment, but it stops gradually due to the reluctance generated by pole effect.

Abstract: A magnetic coupling spindle for automatic screwdrivers. The magnetic coupling spindle comprises: an axle shaft, configured with a bearing on its middle section; an axle cap, sleeved on one end of the axle shaft and covering the bearing; a sliding sleeve, sleeved on the end of the axle shaft far away from the axle cap. The sliding sleeve can slide along the axial direction and on the end toward the direction of the axle cap, a magnet is configured. The part of the periphery of the axle shaft sleeved by the sliding sleeve is formed with a slightly raised stage section extending from the toe, so that the sliding sleeve will not fall apart due to the sliding.

Abstract: A two-stage locking electric screwdriver, with its main improved features as follow: the electric screwdriver has pre-locking and locking functions; the torque settings of the electric screwdriver can be easily modulated, and meanwhile the torque accuracy and energy efficiency can be improved; the torque modulation type is external modulation, so that the torque modulation can be carried out externally and even the torsion spring can be replaced. Meanwhile, the component structures inside the electric screwdriver is improved through a design that the motor directly drives the clutch and then drive the screwdriver head unit, and that an internal gear clutch is used to replaced the gear unit and clutch unit, so that the number of parts is dramatically reduced to save production cost. During general rotation, the electric screwdriver will not drive the clutch unit, and when the torque jumps to the set value, the internal gear clutch rotates and generates a torque.

Abstract: An energy-efficient electric screw driver equipped with MCU, and has three adjustment modes, including: Sport, Normal and ECO. Meanwhile, the capacitor is mounted in the control panel of the electric screw driver and is combined with the battery for use. MCU can limit and change current at different torsions and startup current when the rotating speed is constant. The battery current output can be controlled. At different modes, the power saving effect can be achieved. Lower current also reduces battery temperature, saves power and prolongs battery life.

Abstract: An energy-efficient electric screw driver designed to have three adjustment modes, including: Sport, Normal and ECO. The capacitor is mounted in the control panel of the electric screw driver and is combined with the battery for use. MCU can limit and change current at different torsions and startup current when the rotating speed is constant. The battery current output can be controlled. At different modes, the power saving effect can be achieved. Lower current also reduces battery temperature, saves power and prolongs battery life.

Abstract: A motor accelerator for automatic screwdriver, which is mainly combined with a motor mechanism in automatic screwdriver. The accelerator comprises a bearing (or sleeve) or more interconnected bearings (or sleeves), so as to increase the mass and radius of motor (rotor) and the rotational speed and rotational inertia, thus substantially improving the performance and efficiency; as the accelerator is made of metal materials, this enables satisfactory heat dissipation for rotor; moreover, the accelerator is fitted with a spring (or magnet) to connect the motor, allowing the automatic screwdriver to realize mechanical slow start with small energy (small airflow or low current) output and auxiliary braking function when the automatic screwdriver is stopped.