| 摘要 |
Disclosed is a hydraulic and pneumatic small cylinder comprising: a cylinder part; a front end input/output port; a rear input/output port; a rod; and a circumference part. The front end input/output port includes: a front end entrance part formed in such a manner that an outer circumferential surface of a front end of the cylinder part is dented: and a front end connection opening connecting the front end entrance part with an interior of the cylinder part. The rear input/output port includes: a rear end entrance part formed in such a manner that an outer circumferential surface of a rear end of the cylinder part is dented; and a rear end connection part connecting the rear entrance part with the interior of the cylinder part. The rod is arranged on the interior of the cylinder part to be move frontward and backward with respect to the cylinder part. The circumference part is formed along an outer circumference of a rear end of the rod. The rear connection opening is one long hole or a plurality of holes formed in series. A rear end of the circumference part has a shape formed by cutting a corner to prevent generation of interference on a passage of a hydraulic and pneumatic pressure input and output through the rear end input/output port. When an internal diameter of the cylinder part is less than 50 pi, the cylinder part is made of aluminum, and when the internal diameter of the cylinder part is 50 pi or more, the cylinder part is made of stainless steel. |
