Patent ID: 7553084

Claim:
A linear roller guide unit for compressive load comprising: a rail, a slide block, six rows of rollers, a plurality of retaining members for holding the rollers, six turning members, six circulation pipes, two end caps, and a plurality of fasteners for fixing the two ends caps to the slide block; characterized in that: the rail is an elongated structure approximately I-shaped in cross section, a flat rolling surface for rollers is formed at each of a top right, a bottom right, a top left, a bottom left of a head portion of the rail, and at a top right and a top left of a bottom of the rail, the slide block has at least six through holes allowing for circulation of the rollers, and at least six flat rolling surfaces on which the rollers roll, the six flat surfaces of the slide block are located correspondingly to the flat rolling surfaces of the rail; the six rows of rollers are arranged in pairs between the flat rolling surfaces, the retaining members serve to hold the rollers and to prevent the rollers from falling off when the slide block is disengaged from the rail; the six turning members includes inner members and outer members, each of the inner and outer turning members is defined with an arc-shaped surface, an arc-shaped surface is formed on an inner side of each of the outer turning members and is located opposite the respective inner turning members, the turning members are set at both ends of the slide block and serve to turn the moving direction of the rollers; each of the circulation pipes is a hollow structure inserted in the through holes of the slide block for allowing the rollers to circulate; and the end caps are installed at both ends of the slide block, and each of the end caps is defined with six arc-shaped surfaces for mating with the turning members; the turning members cooperate with the circulation pipes and the two end caps to form a circulation path for allowing the rollers to circulate endless; a plurality of positioning pins are formed at two sides of the respective inner turning members neighboring the arc-shaped surface thereof, and a plurality of positioning holes and a plurality of positioning pins are formed in two sides of the respective outer turning members neighboring the arc-shaped surface thereof for mating with the positioning pins of the inner turning members and for mating with the end caps, respectively.