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活塞杆防转(圆周运动的约束)气缸目前广泛应用于机械手、气动压力机械、无导轨夹具及气缸杆连接的负荷可能产生或要限制负荷产生力矩的场合。为约束气缸活塞杆的转动,国外一些发达国家工艺水平比较先进,他们采用了非圆型的活塞杆截面,将圆形的活塞杆或气缸缸筒改为精密冷拔的异型截面,如正四方形、六角形、三角形或扁圆形。或采用双活塞杆型,以及在气缸外面加装导向装置和靠气缸并列等约束方式,来达到活塞杆的防转目的。上述方法,除了要使活塞杆和缸筒的型材加工要具备相当高的工艺水平外,还使滑动轴承(活塞杆的支承)及各种密封件的制造也变成相当复杂,成本高,且密封和使用效果差。针对市场的需要。利用我国气缸制造技术设计了新型活塞杆防转系列气缸,其结构如图。
Piston rod anti-rotation (circumferential motion restraint) cylinders are now widely used in robots, pneumatic pressure machines, railless fixtures, and where the load connected to the cylinder rod may generate or limit the torque generated by the load. In order to restrict the rotation of the cylinder piston rod, some advanced countries in the world have advanced technology. They have adopted a non-circular piston rod cross-section and changed the round piston rod or cylinder cylinder to a precision cold drawn profiled cross section, such as a positive square. , hexagon, triangle or oblate. Or use a double-piston rod type, and install a guide device on the outside of the cylinder and rely on cylinders and other constraints to achieve the anti-rotation of the piston rod. The above methods, in addition to making the profile processing of the piston rod and the cylinder barrel have a rather high technical level, also make the manufacture of the sliding bearing (piston rod support) and various seals become quite complicated and costly, and Bad sealing and use. For the needs of the market. Utilizing our country’s cylinder manufacturing technology to design a new type of piston rod anti-rotation cylinder, its structure is shown in the figure.