Eccentric clamp of crank shaft

The invention relates to an eccentric clamp of a crank shaft. The eccentric clamp comprises a main shaft flange plate, a packing, an eccentric plate, a clamp body and a crank shaft clamping mechanism, wherein the packing is fixedly arranged in a hole of the main shaft flange plate; an eccentric plate installation hole is formed inside the packing; the eccentric plate with an eccentric shaft is fixed on the packing; an internal hole of the clamp body is formed in the eccentric shaft through a bearing; a plurality of T-shaped groove holes are formed in the packing; through press fit of a T-shaped screw and a nut, the clamp body is fixed on the packing; and the crank shaft clamping mechanism is arranged on the front part of the clamp body. The eccentric plate can be replaced according to different crank shaft eccentricity sizes. The eccentric clamp of the crank shaft is reasonable in structure, simple in installation, high in operating speed, time-saving, high in production efficiency, safe and reliable; the eccentricity is adjusted by replacing the eccentric plate; the eccentric clamp of the crank shaft is applicable to turning and grinding of various kinds of large crank shaft connecting rod necks; and working requirements of different crank shaft eccentricities are met.