Electronic pipette with smooth transmission

The utility model relates to the technical field of pipettes, in particular to an electronic pipette with smooth transmission. The electronic pipette comprises an upper housing, a linear driving motor fixed in the upper housing, a sleeve and a piston rod which can slide in the sleeve, wherein the sleeve is detachably connected with the upper housing, an inner ferrule is fixedly arranged at the output end of the linear driving motor, the top of the piston rod is clamped in the inner ferrule, and the piston rod is connected with the linear driving motor in a rigid manner through the inner ferrule. The structure is firm, the transmission is relatively smooth and does not vibrate accordingly during the moving process, the control precision of the pipette is better, the clamping structure is more convenient to assemble and disassemble, an outer ferrule is fixedly arranged on the inner side of the bottom of the upper housing, the sleeve is clamped in the outer ferrule, and the clamping structure is firmer and more convenient to assemble and disassemble.