液压机构所采用的立式油缸,常因活塞下部的空气不易排出,在高压之下,产生液压冲击和高温而过早的损坏橡胶圈,从而使油缸不能正常工作。如图所示的立式油缸可避免以上缺点。该油缸中,螺母通过两个压板将橡胶圈紧固在活塞上。活塞中有上堵塞和下堵塞。它们中间有一个压缩弹簧胀紧,使上下堵塞上的60°外圆锥体分别与上下压 Vertical hydraulic cylinder used by hydraulic mechanism, often because of the lower part of the piston air is not easy to discharge under high pressure, resulting in hydraulic shock and high temperature and premature damage to the rubber ring, so that the cylinder can not work properly. The vertical cylinder shown in the figure can avoid the above disadvantages. In this cylinder, the nut is fastened to the piston by means of two pressure plates. Piston in the blockage and the next blockage. They have a compression spring between the expansion of the upper and lower plug on the 60 ° outer cone, respectively, with the upper and lower pressure