Pneumatic cylinder with stairstepping lip limit uide bushing

The utility model relates to a pneumatic cylinder with stairstepping lip limit uide bushing belongs to low friction pneumatic cylinder technical field. This pneumatic cylinder includes the left end lid, uide bushing, piston rod, cylinder body, piston and right -hand member lid, the cylinder body inner wall is provided with cyclic annular boss, and left end lid, cylinder body and cyclic annular boss are fixed the uide bushing in the cylinder body concentricityly, one end and the concentricity fixed connection of piston that the piston rod stretched into the cylinder body, the other end of piston rod passes the uide bushing and stretches out the cylinder body with left end centre bore approximately, open cylinder body one side has first hydraulic fluid port and second hydraulic fluid port, the uide bushing is provided with the first seal groove of installing a O type sealing washer with the contact surface of left end lid, and the uide bushing is provided with the second seal groove of installing the 2nd O canned type circle with the contact surface of cylinder body, one side that the uide bushing is close to the piston is provided with the stairstepping lip limit of hugging closely the piston rod. The utility model has the advantages of longe -lived, the friction is low, the frequency response is high, the wearing and tearing volume is low, it is low to leak, the reliability is high and the dynamic pressure is lubricated supports.