Linear guideway with a changeable oil-storage unit

A linear guideway with changeable oil-storage unit, comprising:

• a rail being an elongated structure axially provided at both sides thereof with a rolling passage;
• a sliding block slideably mounted on the rail and interiorly provided with a plurality of rollers employed to roll in the rolling passage, so as to make the sliding block slide relative to the rail;
• an end cap fixed to either end of the sliding block for permitting the rollers to circulate in the sliding block;
• an oil-storage unit defined with an oil storage space, a connecting portion, and an oil feeding hole arranged in the oil storage space;
• a joint unit defined with a through hole, at both ends of the through hole being defined two connecting portions, one of the connecting portions being engaged in an oil filler hole of the end cap in a snap fit manner, and the other of the connecting portions being connected to the connecting portion of the oil-storage unit;
• wherein the oil storage unit is mounted onto the end cap by the joint unit in such a manner that the connecting portion of the oil storage unit is engaged with one of the connecting portions of the joint unit in a snap fit manner and then the other one of the connecting portions of the joint unit is engaged in the oil filler hole of the end cap in a snap fit manner, so that once the oil storage unit is assembled onto the end cap by the joint unit, the oil feeding hole of the oil-storage unit connects forward the end cap and forms serves as an oil route for supplying oil from oil storage unit to the end cap.