Patent ID: 7513336

Claim:
A lubricating device for a linear guideway comprising: a housing, an oil-containing member, metallic magnetic members and magnets, wherein the magnets are disposed at either side of the oil-containing member and can generate a magnetic force, enabling the oil-containing member to come into an effective contact with a rail of the linear guideway; wherein the housing has an assembly space in which are arranged a plurality of positioning protrusions each having a groove facing the rail, and the groove is located a predetermined distance away from an inner wall of the assembly space; the oil-containing member is received in the assembly space and is formed with groove for mating with the groove of the positioning protrusions, a pair of inwardly extending protrusions formed on the oil-containing member extends into effective contact with a rolling passage of the rail, outside the grooves of the oil-containing member are formed a pair of recesses that face the inner wall of the assembly space; the magnets are received in the groove of the respective positioning protrusions; and the metallic magnetic members are received in the recesses at both lateral surfaces of the oil-containing member and are attracted by the magnets in the grooves of the respective positioning protrusions.