| 主权项 |
1. A linear motion guide unit; comprising an elongated guide rail having widthwise opposed sides each of which has first raceway surfaces extending lengthwise of the guide rail, a slider having second raceway surfaces extending in opposition to the first raceway surfaces on the guide rail to define load-carrying races between the first raceway surfaces and the second raceway surfaces, and more than one rolling element rolling through the load-carrying races to move the slider relative to the guide rail;
wherein the slider includes a carriage, end caps, a-lubricant reservoir plates of porous compact, and end seals, the carriage having the second raceway surfaces and return passages extending in parallel with the second raceway surfaces, the end caps being fastened on forward and aft end surfaces of the carriage, one to each end surface, and provided with turnaround passages to join together the load-carrying race and the return passages, the lubricant reservoir plates being impregnated with lubricant and installed in the end caps to cause the lubricant to be applied around the rolling elements while rolling through the turnaround passages, and the end seals being installed on the end caps; wherein each of the lubricant reservoir plates is composed of a lubricant reservoir main body installed between each of the end caps and each of the end seals to fit in a recess formed in each of the end caps, and an applicator nose which fits in a through-hole made in the lubricant reservoir main body and extends to communicate with slots in the respective turnaround passages; wherein the applicator nose is constituted with a basal part and a nose part raised above the basal part to form a surface of circular shape lying around the nose part, the circular shape being larger in transverse section than the through-hole to come into abutment around the nose part against the end cap to keep in place the applicator nose, and the nose part being integral with the basal part to fit into the opening in the lubricant reservoir main body to expose an end face of the nose part to the turnaround passage; and wherein a molded density of the porous compact is less in the lubricant reservoir main body than in the applicator nose whereby as the lubricant soaked in the applicator nose is consumed, the lubricant previously held in the lubricant reservoir main body moves to be resupplied into the applicator nose with capillary action. |
