Automatic clamping and centering rubber tapping machine with incongruous crank

The invention belongs to the technical field of agricultural machinery, and particularly relates to an automatic clamping and centering rubber tapping machine with an incongruous crank. The automatic clamping and centering rubber tapping machine comprises a clamping device, a gear rack circular motion device and a cutter axial motion device; the clamping device comprises an upper clamping device and a lower clamping device which are connected through a supporting plate (4) in sequence from top to bottom; the gear rack circular motion device is mounted on the inner side of a gear frame (1) through a polished shaft (15) and a circular transmission gear (20); and the cutter axial motion device is composed of a lead screw polished shaft and mounted on the polished shaft (15) through a mounting plate (7) to slide. The rubber tree is centered and clamped through the incongruous crank clamping device, then the rubber tree is cut by conducting composite motion on a cutter clamping mechanism, self-centering and clampi