Planetary gear

US5957804A · kind A · utility

Assignee

• ZF FRIEDRICHSHAFEN AG · DE

Inventors

• Horst Schulz · Friedrichshafen, DE
• Bernd Somschor · Tettnang, DE

Key dates

• Filing date: Dec 17, 1997
• Grant date: Sep 28, 1999
• Expiry date: Dec 17, 2017

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F16H2057/128
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

A planetary gear (1) in the form of a Wolfrom gear with a high transmission ratio. Such gears are preferentially used in handling gear engineering. In order to reduce the number of components required and improve the overall efficiency of the planetary gear, the step wheels (4, 6) of the step planet wheels (5) or the hollow wheels (11, 12) are conically toothed and have opposite conical inclinations. The planet carrier (10) is floating, that is, without a separate bearing. The planetary gear is used especially in industrial robots.