Mining pneumatic car puller

The utility model provides a pneumatic pushing machine used for mine, consisting of a cylinder 7, a pushing trolley 9, a slideway 13, a cylinder protection plate 24, a cylinder control circuit and a control valve. The cylinder 7 and the slideway 13 are positioned in the middle of a rail 4 and are fixed on a sleeper 5; a cylinder piston rod 15 is pivotally connected with the rear end of the pushing trolley 9. The frame of the pushing trolley 9 is provided with a pushing claw 17, a front and rear wheel shaft 20 and four wheels 21. The pushing trolley rides on the slideway 13. The pushing claw 17 is pivotally connected at the longitudinal center of the trolley frame by the pushing claw shaft 16; the rear end of the pushing trolley is heavier than the front end thereof; the front end thereof is upwarped and the rear end thereof drops downwards; when the pushing trolley moves forwards, the front end of the pushing claw pushes a mine car bumper 3 or shaft of wheel pair 2; when the pushing trolley moves backwards, t