Sliding block shifting fork device

The invention relates to a sliding block shifting fork device, and belongs to the technical field of sliding block shifting fork devices. The problem that a fit clearance generated by abrasion between a transmission pin and a shifting fork in a sliding block shifting fork structure in the prior art cannot be eliminated is solved. The sliding block shifting fork device comprises an anti-backlash unit, a ball screw (1), a screw nut (2) and an output shaft (6); the anti-backlash unit is used for eliminating an abrasion gap of the sliding block shifting fork device; and the screw nut (2) converts the linear reciprocating motion into the rotary motion of the output shaft (6). According to the sliding block shifting fork device, a spring is arranged between taper pins at the two ends of a sliding block, the taper pins make contact with the inclined face of the shifting fork all the time under the action of the elastic force of the spring, the fit clearance generated by abrasion of the sliding block shifting fork af