Gear motor with an electric motor having a hollow shaft

US5631511A · kind A · utility

Assignee

• Leybold GmBH · DE

Inventors

• Winfried Schulmann · Kleinostheim, DE
• Franz Thimm · Alzenau, DE
• Helmut Kaiser · Wolfratshausen, DE

Key dates

• Filing date: Sep 23, 1994
• Grant date: May 20, 1997
• Expiry date: Sep 23, 2014

Classification

• Technology area (CPC H): Electricity
• CPC primary: H02K7/116
• WIPO field: Electrical machinery, apparatus, energy
• WIPO sector: Electrical engineering

Abstract

A gear motor (1), with an electric motor (4) whose rotor (7) has a hollow shaft (8), drives, through at least one gear box (26) with at least one drive step, at least one load. For the purpose of compact configuration combined with low vibration, there is coaxially disposed in the hollow shaft (8) an output shaft (19) which can be shifted selectively by means of a first clutch (24) to the hollow shaft (8), and by means of a second clutch (16) via the gear box (26) to the hollow shaft (8). Preferably the clutches are configured as magnetic clutches, and again preferably the first clutch (24) is disposed for the direct shifting of the hollow shaft (8) to the output shaft (19) at the one end of the hollow shaft (8), and the second clutch (16) at the other end of the hollow shaft (8). The gear motor (1) is used preferentially for driving rotary parts in crystal pulling apparatus.