Planetary Gear Set with Several Gear Stages

• US 20140135165A1
• Filed: 03/14/2013
• Published: 05/15/2014
• Est. Priority Date: 11/13/2012
• Status: Active Grant

• Current Assignee: IMS Gear SE & Co. KGaA
• Original Assignee: IMS Gear GmbH
• Inventors: Kruselburger, Markus
• Granted Patent: US 9,328,802 B2
• Time in Patent Office: Days
• US Class Current: 475/337
• CPC Class Codes: F16H 1/46 Systems consisting of a plurality of gear trains each with orbital gears, i.e. systems having three or more central gears
• CPC Class Codes: F16H 2055/176 Ring gears with inner teeth

Abstract

Planetary gear set with several gear stages, comprising an annular ring with which the planet gears are in engagement with at least one gear stage; according to the invention it is provided that at least one circular insert part with external and internal gearing is arranged in an annular ring, whereby the external gearing is in engagement with the annular ring and the internal gearing meshes with planet gears of another gear stage.

Claims

1. A planetary gear set with several gear stages, comprising an internally geared annular ring with which the planet gears are in engagement with at least one gear stage, further comprising wherein at least one circular insert part with external and internal gearing is arranged in an annular ring, whereby the external gearing is in engagement with the annular ring and the internal gearing meshes with planet gears of another gear stage.

2. The planetary gear set of claim 1, further comprising wherein the annular ring has straight gearing, which is in engagement with the external gearing of the insert part that is designed as straight gearing.

3. The planetary gear set of claim 1, further comprising wherein the internal gearing of the insert part is designed as helical gearing.

4. The planetary gear set of claim 1, further comprising wherein (i) the annular ring is designed with a first and second internal gearing section in axial direction, whereby the planet gears of the at least one gear stage are in engagement with the first gearing section and the external gearing of the insert part is in engagement with the second internal gearing section and (ii) for forming a transition from the first internal gearing section to the second internal gearing section, a shoulder is provided, which the insert part contacts with its face side.

5. The planetary gear set of claim 4, further comprising wherein for forming the shoulder, the crown line diameter of the gearing in the area of the first gearing section of the annular ring is smaller than the crown line diameter of the gearing of the second internal gearing section of the annular ring.

6. The planetary gear set of claim 4, further comprising wherein for forming a face-side projection of the annular ring, the second internal gearing section is longer in axial direction than the axial length of the insert part.

7. The planetary gear set of claim 5, further comprising a motor flange designed to form a spline with the projection.

8. The planetary gear set of claim 1, further comprising wherein that the insert part forms a first gear stage with the other gear stage, which meshes with a drive pinion coupled with a drive.

9. The planetary gear set of claim 4, further comprising wherein the planet gears that mesh with the annular ring form at least one second gear stage.

10. The planetary gear set of claim 5, further comprising wherein the planet gears meshing with the annular ring are provided as the third gear stage.