| 摘要 |
PROBLEM TO BE SOLVED: To keep a smooth reciprocating motion over a long period of time under severe working condition, by overlapping elastic members, which is in tightly contact with a track shaft, in a length direction of the track shaft. SOLUTION: Lubricant supply members 7, end seals 8, and dustproof members 9 are arranged to both front and rear ends in a proceeding direction of a sliding base 2. The dustproof members 9 are made of polyurethane foam of open cell, and is constituted of elastic members 16a, 16b, 16c constituting a lubricant supply part by being impregnated with a lubricant; a lubricant pocket forming member constituted of spacer members 16x, 16y made of a metal plate and interposed between the elastic members 16a to 16c; a scraper member 17 made of a metal plate and covering approximate whole of the lubricant pocket forming member together with the end seals 8 and a surface of a track rail 1. The elastic members 16a to 16c are in a close fit state. Accordingly, foreign matters can be surely eliminated, and reduction of lubricating ability can be prevented in advance over a long period of time under severe working condition in which using of a coolant is needed and there is possibility of exposure to contaminant and dust. |
