Linear actuator

The utility model relates to a linear actuator. The wrench comprises a main body, a transmission mechanism, a clutch mechanism and a wrenching mechanism, the clutch mechanism comprises a clutch wheeland a positioning wheel; the wrenching mechanism comprises a rotary poking piece, a torsion spring, a connecting rod, a cover cap and a wrenching handle. The rotary shifting piece is arranged corresponding to the clutch wheel, the torsion spring is arranged in the rotary shifting piece, one end of the torsion spring is fixed on the cover cap, the other end of the torsion spring is used for pushingthe rotary shifting piece to reset, one end of the connecting rod is pivoted with the rotary shifting piece, and the other end of the connecting rod is connected with one end of the trigger piece; byapplying force to the trigger piece, the rotary shifting piece can drive the clutch wheel to operably perform embedded transmission or separated transmission relative to the positioning wheel. Therefore, the linear actuator no