Limiting type sleeve pallet fork

The limiting type sleeve pallet fork comprises a sleeve body, a supporting column, an L-shaped limiting plate and a positioning pin, a limiting mechanism is installed on the top of the sleeve body and comprises the L-shaped limiting plate, a containing cylinder is installed on the outer wall of the L-shaped limiting plate, a fixing clamping block is installed at the bottom end of a shifting rod, and a limiting rod is installed on the supporting column. And the fixed clamping block stretches and retracts relative to the storage barrel, and a first spring is installed on the outer wall of the shifting rod in a winding mode. The L-shaped limiting plate is installed and can be lapped on the adjusting rod and support the storage barrel, the positioning pin can penetrate through the L-shaped limiting plate and the designated adjusting hole, the first spring can apply thrust to the fixing clamping block, the fixing clamping block can be clamped into the fixing hole, and therefore the positioning pin, namely the L-sh