常见内卡键式液压缸的典型结(?)如图1所示。内卡键安装在缸筒内壁(?)卡键槽内,其作用是固定导向套,一(?)在加工成圆环形后,以120°剖切成3(?)份。内卡键连接的液压缸由于具有强(?)好、结构紧凑、外形尺寸小、质量轻(?)特点,得到了广泛应用。但这种液(?)缸也存在一些严重缺点:一是拆装困难。拆装这种液压缸时,导向套要进入缸筒内一定的深度,直至露出卡键槽或内卡键,才能取出或装入内卡键。缸径较大时拆装更困难,常造成零件 The typical knuckle-type hydraulic cylinder typical knot (?) Shown in Figure 1. Internal card key installed in the cylinder wall (?) Card keyway, its role is to fix the guide sleeve, a (?) After processing into a circular ring, the 120 ° cut into 3 (?) Copies. Due to the advantages of strong (?), Compact structure, small size, light weight (?), The hydraulic cylinder connected with the inner card key has been widely used. However, this liquid (?) Cylinder also has some serious shortcomings: First, disassembly difficult. When disassembling the hydraulic cylinder, the guide sleeve should enter the cylinder tube to a certain depth until the key slot or inner card key is exposed to remove or insert the inner card key. Bigger bore when the disassembly is more difficult, often caused by parts