Linear motion guide unit
AssigneeNippon Thompson Co., Ltd.
InventorToyohisa Ishihara
Life of this patent
Estimating the term…
Abstract
A linear motion guide unit is disclosed in which a tubular composition to provide a return passage is high in mechanical stiffness and also makes certain of steady application of lubricant to rolling elements rolling through the return passage, thereby ensuring proper lubrication under maintenance-free operation. The return passage is defined inside a hole of a tubular composition installed in an axial bore made in the carriage of a slider. The tubular composition is composed of a tubular skeleton made therein with a window, and a cellular molded member that fits into the window. The rolling elements of cylindrical roller, when coming into rolling-contact with the cellular member while rolling through the return passage, are applied with lubricant film.
Claims14
A linear motion guide unit comprising an elongated guide rail, a slider movable lengthwise of the elongated guide rail, and a rolling element allowed to roll through a circulating circuit composed of a race defined between the elongated guide rail and the slider, and a return passage and a turnaround passage both made in the slider,
- wherein the return passage is provided by a hole extending forward and aft through a tubular composition installed in the slider, and
- wherein the tubular composition is comprised of a tubular skeleton having therein a lengthwise window made open from a circular surface thereof to the hole, and a cellular member extending lengthwise to fit into the window in the tubular skeleton.
Dependencies are inferred from the claim text.