UNPOWERED CAVITY PUSH-PULLER AND CLAMPER USED THEREBY

摘要

An unpowered cavity push-puller and clamper used thereby, employing a lower cavity of an oil tank body (6) to hold oil to seal a nitrogen spring (8), thus effectively solving the problem of sealing the nitrogen spring (8) under a high temperature and a high pressure, and having a simple and reasonable structure design, a low manufacturing cost and stable control of the nitrogen spring (8) and of temperature change; and in addition, the lubrication function of lower cavity oil enables the nitrogen spring (8) to have good lubricity with a cavity oil tank piston (1) and the oil tank body (6). The unpowered cavity push-puller configured to seal the nitrogen spring (8) under high pressure provides a constant power to realize a push-pull function without an additional external power source, and maintains a pressure when clamping a machined component without leakage, thus having a high stability, saving energy and being non-polluting.