LINEAR MOTION GUIDE UNIT WITH INSIDE SEAL

摘要

An inside seal is installed to make close contact with a lower surface of a slider to exclude foreign material from circulating circuits, ensuring smooth sliding movement of the slider relative to a guide rail. The inside seal is composed of a major portion made of an elastic member and a metallic core, an elastic lip extending sidewise from a lengthwise side of the major portion across the overall length of the major portion to come into sliding contact with a guide rail, and hooked portions upright at lengthwise ends of the major portion at right angles to the major portion so as to fit into slots on end caps to keep in place the inside seal. Another longitudinal side opposite to the longitudinal side joining with the lip across the flat major portion has elastic edges to come into elastic abutment against the inside wall surface of the end cap, thereby urging the hooked portion towards one side of the slot to keep in place the inside seal.

主权项

1. A linear motion guide unit; comprising an elongated guide rail having two sides, each side having a first raceway groove extending in a longitudinal direction of the guide rail, and a slider having second raceway grooves lying in opposition to the first raceway grooves of the elongated guide rail, the slider being composed of a carriage which fits or conforms over the guide rail to move in the longitudinal direction of the elongated guide rail in a sliding manner with a plurality of rolling elements allowed to roll through load-carrying races defined between the first raceway grooves and the second raceway grooves, end caps secured to forward and aft ends of the carriage, one to each end, end seals attached on outward end surfaces of the end caps, one to each end cap, and a pair of inside seals installed between a top surface of the guide rail and both a lower surface of the carriage and lower surfaces of the end caps lying in opposition to the top surface of the guide rail,
wherein the inside seals are installed along the load-carrying races, one to each race, wherein the inside seals each have a flat major portion of elastic member extending lengthwise of the inside seal in parallel with one of the load-carrying races and making close contact with the lower surface of the carriage and lower surfaces of the end caps, a lip of the elastic member extending sidewise beyond one of longitudinal sides of the flat major portion across an overall length of the major portion to makes a sliding close contact with the top surface of the guide rail throughout the overall length of the lip, and flat hooked portions upright at lengthwise ends of the major portion at right angles to the major portion so as to fit into slots on the outward end surfaces of the end caps to keep in place the inside seal relative to the end caps.