| 摘要 |
PURPOSE: A swivel joint is provided to install plastic seal seat bearings between a main body and a rotation body and at both sides of the hemispheric surface of the rotating body, thereby smoothly implementing a four-axis drive for a rotating motion and a turning motion in an oil-free condition. CONSTITUTION: A swivel joint includes seal seat bearings (23,23'), a multi-contact O-ring (26), and a lip seal (29). The bearings are installed between an annular rim (20) and a snap ring (22). Multiple micro grooves (31,31') are formed on the inner diametral surfaces of the bearings. The rim is formed at one end of the inner diametral part of a main body (10). The ring is placed at a snap ring groove (21) at the inner part of the main body, and a female screw ends at the inner portion. The lip seal is installed at a lip seal groove (28) below the right end of a nipple body (27).
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