Patent ID: 8403564
Filing Date: 2013-03-26
Classification: F16C

Abstract:
1. A linear motion device, comprising: a first assembly and a second assembly which is linearly movable relative to the first assembly; at least one first rolling surface extending in a longitudinal direction, provided on the first assembly and situated opposite a second rolling surface provided on the second assembly; a row of rolling elements located between the first and second rolling surfaces, the first assembly including a single-pieced, first body and at least one deflection assembly; at least one return passage provided in the first body; at least one curved deflection passage located entirely within the deflection assembly and connecting the first rolling surface to the return passage in a manner such that the rolling elements circulate endlessly; at least one projection engaging in the return passage and provided on the deflection assembly, wherein the return passage is provided completely and directly in the first body, the at least one projection of the deflection assembly extends in the longitudinal direction, such that a width of said at least one projection measured in a circumferential direction is less than a length of said at least one projection in the longitudinal direction, and the return passage includes a groove which is adapted to the at least one projection, and into which the at least one projection engages, wherein the at least one projection includes at least one guide surface that faces the rolling elements, is situated, at a front end of the at least one projection facing away from the deflection assembly, and recessed into the groove so far that the at least one guide surface is unable to come in contact with the rolling elements, wherein the guide surface is slanted relative to a course of the return passage, and, on the front end of the at least one projection, the guide surface is situated further from a central axis of the return passage than on an opposite, rear end of the at least one projection, and wherein the rolling elements are spherical rolling elements, and the at least one projection has a U-shaped cross section having a base and two U-legs, on each of end faces of which a guide surface is provided, a length of the U-legs increases from the front end toward the rear end of the at least one projection.