Variable-speed magnetic coupling having radially movable magnet

A variable-speed magnetic coupler having a radially movable magnet, consisting of a driving disc assembly, a driven disc assembly and a speed regulating device assembly, the driven disc assembly includes a driven shaft, a conductor ring, a driven shaft sleeve, a driven disc base, a heat sink and a stud, a right end of the driven shaft is connected with the driven shaft sleeve through a key, a right side of the driven shaft sleeve is connected with the driven disc base by a screw, the conductor ring is bonded within the driven disc base by means of deep groove embedding, the driven disc base includes a plurality of driven disc bases, the driven disc bases are fixedly connected to each other by a plurality of studs, the heat sink is mounted on an outer side of one of the driven disc bases, the driving disc assembly includes a driving shaft, a driving shaft sleeve and permanent magnets, characterized in that, the driving disc assembly is further provided with a baffle, a round frame and a permanent magnetic carrier, a left end of the driving shaft is connected with the driving shaft sleeve through a key, a right side of the driving shaft sleeve is connected with the round frame through a screw, the permanent magnetic carrier with one of the permanent magnets bonded in an upper carrier frame is inserted into a rectangular through-hole of the round frame and is rotated synchronously with the driving shaft;

• the speed regulating device assembly includes a cylinder pin, a grooved disc, a speed regulating sleeve, a block, a block pin and a positioning sleeve, the grooved disc is sleeved on a left side of the driving shaft and an arc groove is machined on a left side of the grooved disc, one end of the cylinder pin is inserted into the through-hole at a lower end of the permanent magnetic carrier, and an other end of the cylinder pin is contacted and fitted with an inner wall of the arc groove of the grooved disc, which forms a groove cam slider mechanism together with the round frame, a right side of the grooved disc is connected with the speed regulating sleeve through a screw, the speed regulating sleeve is sleeved on the driving shaft, the speed regulating sleeve and the driving shaft are respectively processed by a same number of a chute and a straight groove, the block is sleeved in the speed regulating sleeve, the block pin includes a plurality of block pins, the block pins with a same number as the chute are inserted into a circular through hole of the block, and each of the block pins is simultaneously contacted and fitted with inner walls of one chute and one straight groove on the speed regulating sleeve and the driving shaft, a rotational angle of the straight groove on the speed regulating sleeve maintains a same with a circumferential angle of the arc groove on the grooved disc, the block can be slid axially on the speed regulating sleeve together with one of the block pins, and at a same time, a right end of the positioning sleeve is abutted against the grooved disc to keep its axial fixing.