Improved mechanical clutch

A blind hole and an installation through hole are formed in an inner cavity of a clutch shell in the axial direction of a second shifting fork shaft, one end of the second shifting fork shaft is inserted into the blind hole, the other end of the second shifting fork shaft penetrates out of the installation through hole and extends outwards, and a threaded section matched with a locking nut is arranged on the outer wall of the extending end of the second shifting fork shaft. The limiting block is used for axially limiting the shifting fork shaft II; a framework oil seal is arranged at the matching position of the second shifting fork shaft and the mounting through hole, and the rocker arm is mounted between the side, close to the mounting through hole, of the clutch shell and the locking nut. The second shifting fork shaft is connected with the second shifting fork in the radial direction through a second limiting pin. On the basis of an existing mechanical clutch, one end of the installation hole of the secon