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US 4,118,101 AGranted
Double slide way bearing including recirculating ball bearings
OwnerHiroshi Teramachiinventor
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OwnerHiroshi Teramachiinventor
Estimating the term…
A double slide way bearing adapted to carry and locate a heavy object such as a machine tool within a plane which includes at least one main body having an upper and a lower rail-receiving grooves formed in its upper and lower surfaces to extend typically in two orthogonal directions. The upper rail-receiving groove is adapted to receive an upper rail bed which fixedly carries the object, while the lower rail-receiving groove is adapted to receive a lower rail bed which is fixed to a base. Between the rail-receiving groove and the rail bed, at each of the upper and the lower sides of the main body, interposed are loaded and unloaded balls which are adapted to roll along respective paths defined by grooves formed in the inner peripheral wall of each rail-receiving groove and in the surface of the associated rail bed, so that the object may be slidingly moved in the directions in which the upper and the lower rail beds extend to any desired position within a plane including the upper rail bed. The inner peripheral wall of each rail-receiving groove constitute outer races of a plurality of rows of balls to directly guide the latter, so that the main body can be made compact and the bearing can have sufficient rigidity to provide a precise location of object.
A double slideway bearing assembly capable of resisting torsional forces incurred in predetermining positioning a relative heavy workpiece at a given point in a plane comprising at least one bearing block, said bearing block having opposed surface portions, a rail groove formed in each of said opposed surface portions, said rail grooves being disposed at an angle to one another, an elongated rail bed disposed in each of said rail grooves whereby said rail beds are disposed at an angle relative to each other, said rail grooves and its associated rail bed having complementary bearing surfaces to define at least a pair of oppositely disposed bearing races, a plurality of ball bearings disposed on each of said opposed bearing races, a retainer means disposed between the surface of said rail grooves and associated rail bed for retaining said ball bearings therebetween, said retaining means and respective rail groove having opposed complementary bearing portions to define a return raceway, said return raceway defining with said first mentioned bearing races a continuous endless raceway for said ball bearing whereby the ball bearing in said bearing races are loaded and the ball bearing in said return raceway are non-loaded whereby said rail beds are rendered respectively moveable relative to said bearing block and to each other.
A double slideway bearing assembly comprising a base, a base rail rigidly secured to said base, a bearing block having opposed surface portions, a rail groove formed in each of said opposed surface portions, said rail groove in each of said surface portions being angularly disposed, and said respective rail grooves being open to its respective surface portion of said bearing block, said block being slideably disposed on said base rail, a table, a table rail rigidly connected to said table, said table rail being slideably disposed in the other rail groove of said bearing block, and a bearing means interposed between each of said rails and its complementary rail groove of said bearing block, said bearing block being slideably disposed on said rails between said base and said table rigidly connected to its respective rail.
Dependencies are inferred from the claim text.