Transmission device and electric drive unit comprising at least one electric machine and the transmission device

US10527143B2 · kind B2 · utility

Assignee

• Schaeffler Technologies AG & Co. KG · DE

Inventors

• Philip Wurzberger · Nuremberg, DE
• Thorsten Biermann · Wachenroth, DE

Key dates

• Filing date: Aug 26, 2016
• Grant date: Jan 7, 2020
• Expiry date: Oct 17, 2036

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F16H2048/106
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

Transmission devices are disclosed having a first planetary drive, a second planetary drive, a hollow shaft, and a shaft which is seated concentrically in the hollow shaft and can be rotated relative to the hollow shaft. In one example, the first planetary drive includes a first sun gear and first planet gears in mesh with the first sun gear, and the second planetary drive has second planet gears in mesh with a second sun gear. The first planet gears and second planet gears may be spaced apart radially from a rotational axis common to the hollow shaft and the shaft, and a shaft section of the shaft may protrude axially from one end of the hollow shaft. In this arrangement, the first sun gear is seated on the shaft section. The second sun gear may be seated on the hollow shaft coaxially with the first sun gear. The first sun gear may carry a seal that rests sealingly on a rotationally symmetrical section of the hollow shaft, which is configured to be rotated relative to the first sun gear about the rotational axis.