Sleeper nail puller

A sleeper nail puller comprises a supporting pipe, an air cylinder assembly is installed on the supporting pipe, the air cylinder assembly comprises an air cylinder lower cover, a first air cylinder sleeve and an air cylinder upper cover, the air cylinder lower cover is fixedly installed on the supporting pipe, the first air cylinder sleeve is located between the air cylinder lower cover and the air cylinder upper cover, a first piston is installed in the first air cylinder sleeve in a matched mode, a piston rod is installed at the bottom end of the first piston, penetrates out of the air cylinder lower cover and stretches into the supporting pipe, a first spring is installed between the first piston and the air cylinder upper cover, and the first spring always has the tendency of pushingthe first piston to move downwards. The piston is pushed to move through gas provided by the outside, and then scissor arms on the piston rod are driven to be opened, closed and vertically moved, so that the nail pulling oper