CPC F04C 18/344 (2013.01) [F04C 29/04 (2013.01); F04C 2270/17 (2013.01)] | 19 Claims |
1. A piston limiting structure, comprising:
a cylinder, having a piston hole perpendicular to an axial direction of the cylinder and penetrating the cylinder, wherein a projection of the piston hole in a penetrating direction is circular;
a piston, disposed in the piston hole in a form-fit manner and slid in the piston hole in a reciprocating manner, wherein a side wall of the piston is provided with a limiting surface, and the limiting surface does not penetrate through two ends of the side wall of the piston along an axial direction of the piston;
a limiting member, wherein the cylinder is provided with a limiting hole passing from an outer wall of the cylinder to the piston hole, the limiting member is mounted in the limiting hole in the form-fit manner, and the limiting member abuts against the limiting surface to limit a rotation of the piston around its own axis; and
the limiting hole penetrates from an end face of the cylinder to the piston hole and is parallel to an axial direction of the cylinder.
|