Clamping jaw structure for automobile engine cylinder body or cylinder cover

The invention relates to a clamping jaw structure for an automobile engine cylinder body or cylinder cover. The clamping jaw structure for the automobile engine cylinder body or cylinder cover comprises a clamping jaw device, wherein the clamping jaw device is mounted on a mounting plate through an X-Z sliding table, the clamping jaw device has freedom degrees of reciprocating motion along the X axis and the Z axis which are perpendicular to each other in the X-Z sliding table, the clamping jaw device comprises a locking air cylinder, a linear shaft, a clamping jaw, a connection rod, a connection seat and a clamping jaw mounting seat, the clamping jaw mounting seat is connected with the X-Z sliding table, the locking air cylinder is arranged in the clamping jaw mounting seat, the linear shaft is connected with the clamping jaw mounting seat in a sliding mode, one end of the linear shaft is connected with a piston rod of the locking air cylinder, the clamping jaw is hinged with one endof the connection rod, the other end of the connection rod is hinged with the connection seat mounted on the clamping jaw mounting seat, one end of the clamping jaw is hinged with the other end of thelinear shaft, the other end of the clamping jaw is a clamping end for grasping the cylinder body or the cylinder cover, and the linear shaft, the clamping jaw, the connection rod and the connection seat form a four linkage mechanism driven by the locking air cylinder to stretch out and draw back so as to drive the clamping end of the clamping jaw to clamp or loosen. The clamping jaw structure forthe automobile engine cylinder body or cylinder cover improves reliability of the clamping jaw, and improves assembly efficiency on an automobile engine production line.