Linear motion device with compact motor arrangement

US8402853B2 · kind B2 · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Steffen Pfister · Langen, DE
• Bernhard Keller · Kaisten, DE

Key dates

• Filing date: Jan 25, 2010
• Grant date: Mar 26, 2013
• Expiry date: Jun 2, 2031

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T74/18744
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

A linear motion device has a first assembly and a second assembly which is linearly movable relative to the first assembly; a row of rolling elements that may circulate endlessly is located between the first and second assemblies, the first assembly including a rotatable threaded spindle that extends parallel to the longitudinal direction, and that is engaged in a screw-type manner with a threaded nut, the threaded nut being a component of the second assembly; the first assembly also includes an electric motor that is connected to the threaded spindle in a rotationally driving manner, and the rotational axis of which extends parallel to the threaded spindle; the first assembly includes a single-pieced, first body. The threaded spindle and the electric motor are located next to one another in the region of the first body, the electric motor extending along a first longitudinal section of the first body, while a first rolling surface for the rolling elements extends across a second longitudinal section—which differs from the first longitudinal section—of the first body; the threaded spindle extends over the first longitudinal section and at least in sections over the second longitudi…