US 2003/0145672 A1 · Ball screw drive

Abstract

Ball screw drive including threaded spindle and threaded nut body. Nut body is axially displaceable on spindle, and threaded grooves of the spindle and the nut body are arranged to form load-bearing ball channel. Return channel is provided, as is plurality of balls for movement through load-bearing ball channel and return channel. Return channel is structured so that balls moving through return channel are not under stress. At least one of spindle and nut body have at least one additional groove parallel to load-bearing channel, and return channel includes the additional groove. End caps arranged at opposite ends of nut body are structured and arranged to transfer balls from load-bearing ball channel to return channel and from return channel to load-bearing ball channel. The instant abstract is neither intended to define the invention disclosed in this specification nor intended to limit the scope of the invention in any way.

Claims31

Dependent claims

A ball screw drive comprising:

a spindle comprising at least one threaded groove;
a nut body comprising at least one threaded groove, said nut body being structured and arranged to be axially displaceable on said spindle;
said at least one threaded groove of said spindle and said at least one groove of said nut body being arranged to form a load-bearing ball channel;
a return channel;
a plurality of balls arranged for movement through said load-bearing ball channel and said return channel, wherein said return channel is structured so that said balls are not under stress as they move through said return channel;
at least one of said spindle and said nut body comprising at least one additional groove arranged parallel to said load-bearing channel, such that said return channel comprises said at least one additional groove;
and
end caps arranged at opposite ends of said nut body structured and arranged to transfer the balls from said load-bearing ball channel to said return channel and from said return channel to said load-bearing ball channel.

5 more elements

Dependencies are inferred from the claim text.

Ball screw drive

Life of this patent

Ball screw drive

Life of this patent

Abstract

Claims31