| 摘要 |
PROBLEM TO BE SOLVED: To lengthen the service lift by arranging a coil spring between a retainer and a lower seal, returning the retainer upward by this coil spring, and increasing an apparent moving distance of a steel ball. SOLUTION: This bearing structure of a linear actuator is constituted so that a cylindrical bearing 20 is composed of a cylindrical body 21, the retainer 24 and the steel ball 25 arranged in the cylindrical body 21, and positioned on the outer periphery of a support rod 31, an upper seal 22 and the lower seal 23 arranged on both ends of the cylindrical body 21, and the coil spring 26 positioned between the retainer 24 and the lower seal 23.
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