Patent ID: 9279487
Filing Date: 2016-03-08
CPC Classification: F16H,Y10T

Claim Text:
1. A device including a double nut for a ball screw unit having a main axis defining a main axial direction along a ball screw part of the unit, which can be adjusted to regulate tension between the double nut and the ball screw with their ball bearings, which comprises: the double nut, which generally encircles the main axis and is spaced annularly therealong to define a length, and which has two main parts, a first ball nut part and a second ball nut part, each of which having a housing with an internal face that confronts the internal face of the other housing, and internal race portions, which are in an initial position relative to one another and which correspond to external race portions of the ball screw part, which is for receiving a set of ball bearings, with the two main parts connected to each other, at least indirectly, such that the internally confronting faces of the housings touch one another when the double nut is assembled with the ball screw part and ball bearings to provide the ball screw unit; and an adjustment mechanism, which can be accessed from an external end of the double nut and/or be self-adjusting, and which can transmit force from a first location of the double nut that is in the first ball nut part to a second location of the double nut that is in the second ball nut part, thus spaced apart lengthwise from the first location, into a force inclusive of a force applicable at a position radially spaced apart from the main axis and generally orthogonal relative to a plane in which the main axis lies so that, when appropriate, the internal race portions of the at least two parts can be moved into an adjusted position different from the initial position relative to one another, wherein: