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US 5,927,858 AGranted
Linear motion rolling guide unit
AssigneeNippon Thompson Co., Ltd.
InventorNorimasa Agari
Life of this patent
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AssigneeNippon Thompson Co., Ltd.
InventorNorimasa Agari
Estimating the term…
In this linear motion rolling guide unit, separators of different thicknesses are interposed between adjacent rolling elements so that the rolling elements are arranged in an unequally spaced manner, whereby the vibrations and noises, which are ascribed to regular rolling of the rolling elements, are minimized, the early wear in a casing and end caps being thereby prevented. The rolling elements roll in rolling element circulating passages comprising raceways formed between raceway surfaces of a track rail and the casing, direction changing passages formed in the end caps, and return passages formed in the casing. Among the rolling elements, separators 30 formed to unequal thickness are provided. When an excessively large load is imparted to the rolling elements, impressions occurs at irregular intervals in the raceway surfaces, so that the rolling elements do not simultaneously fit in the irregularly spaced impressions while the slider is moved. Therefore, the vibrations and noises due to the rolling of the rolling elements and the early wear in the casing and end caps decrease.
A linear motion rolling guide unit comprising a track rail having first raceway surfaces on both of longitudinally extending side surfaces thereof, and a slider adapted to be slid on and relatively to said track rail via rolling elements, said slider having a casing provided with second raceway surfaces formed so as to be opposed to said first raceway surfaces and for the purpose of forming raceways in which rolling elements roll, and return passages in which said rolling elements return;
Dependencies are inferred from the claim text.