Retainer plates for fixing planet carrier and ring gear

Patent metadata

Field	Value
Publication number	US-10969002-B2
Application number	US-201716347203-A
Country	US
Kind code	B2
Filing date	Nov 3, 2017
Priority date	Nov 9, 2016
Publication date	Apr 6, 2021
Grant date	Apr 6, 2021

Abstract

An assembly includes a first planetary stage, a second planetary stage, and at least one retainer plate. The first planetary stage has a planet carrier and the second planetary stage has a ring gear. The planet carrier and the ring gear are configured to be rotated about a common axis of rotation. The retainer plate is attached to the ring gear and engages in a groove in the planet carrier. The groove and the axis of rotation are at least partially skewed to each other. The retainer plate is arranged at least partially on a first side of a first plane and on a first side of a second plane. The first plane and the second plane intersect along the axis of rotation. All planet bolts fixed in the planet carrier each lie on a second side of the first plane and/or the second plane.

First claim

The invention claimed is:

1. An assembly, comprising:
a first planetary stage having a planet carrier;
a second planetary stage having a ring gear; and
at least one retainer plate attached to the ring gear and configured to engage a groove in the planet carrier,
wherein the planet carrier and the ring gear are connected to each other for conjoint rotation and are configured to be rotated about a common axis of rotation,
wherein the groove in the planet carrier has a longitudinal axis, the longitudinal axis and the axis of rotation being anti-parallel skew lines that have no common intersection point,
wherein the retainer plate is arranged at least partially on a first side of a first plane and on a first side of a second plane, the first plane and the second plane intersecting one another along the axis of rotation,
wherein all planet bolts fixed in a second planet carrier of the second planetary stage each lie on a second side of the first plane and/or on a second side of the second plane, and
wherein all arms of the second planet carrier each lie on the second side of the first plane and/or on the second side of the second plane.

2. The assembly according to claim 1 , wherein the groove in the planet carrier has cross sections along the longitudinal axis that are congruent.

3. The assembly according to claim 1 , wherein the retainer plate is fixed to the ring gear in such a way that the retainer plate is immovable with respect to the ring gear.

4. The assembly according to claim 1 , wherein the retainer plate is attached to the ring gear via a threaded connection.

5. The assembly according to claim 1 , wherein the planet carrier includes two flanges that extend in an axial direction and two arms that are aligned in a radial direction.

6. The assembly according to claim 5 , wherein the flanges are offset in an axial direction relative to each other and are connected to each other by the two arms.

7. The assembly according to claim 1 , wherein the planet carrier includes a second groove that extends in a radial direction such that the second groove has a longitudinal axis that intersects the common axis of rotation.

8. The assembly according to claim 7 , wherein the retainer plate includes a lug configured to engage in the second groove.

9. The assembly according to claim 1 , wherein the assembly is a component of a gearbox of a wind turbine.

10. An arrangement, comprising:
a first planetary stage having a planet carrier;
a second planetary stage having a ring gear; and
at least one retainer plate attached to the ring gear and configured to engage a groove in the planet carrier,
wherein the planet carrier and the ring gear are connected to each other for conjoint rotation and are configured to be rotated about a common axis of rotation,
wherein the groove in the planet carrier has a longitudinal axis, the longitudinal axis and the axis of rotation being anti-parallel skew lines that have no common intersection point,
wherein the retainer plate is arranged at least partially on a first side of a first plane and on a second side of a second plane, the first plane and the second plane intersecting along the axis of rotation,
wherein all planet bolts fixed in a second planet carrier of the second planetary stage lie in each case on a second side of the first plane and/or on a second side of the second plane, and
wherein all arms of the second planet carrier lie in each case on the second side of the first plane and/or on the second side of the second plane.

11. The assembly according to claim 10 , wherein the groove in the ring gear has cross sections along the longitudinal axis that are congruent.

12. The assembly according to claim 10 , wherein the retainer plate is fixed to the planet carrier in such a way that the retainer plate is immovable with respect to the planet carrier.

13. The assembly according to claim 10 , wherein the retainer plate is attached to the planet carrier via a threaded connection.

14. The assembly according to claim 10 , wherein the planet carrier includes two flanges that extend in an axial direction and two arms that are aligned in a radial direction.

15. The assembly according to claim 14 , wherein the flanges are offset in an axial direction relative to each other and are connected to each other by the two arms.

16. The assembly according to claim 10 , wherein the assembly is a component of a gearbox of a wind turbine.

Assignees

• Zahnradfabrik Friedrichshafen
• Zf Wind Power Antwerpen Nv

Inventors

• Sperlich Ralf
• Muench Joerg
• Strasser Dirk

Classifications

• F16H2055/176

  Ring gears with inner teeth · CPC title

• F16H1/46

  Systems consisting of a plurality of gear trains each with orbital gears, {i.e. systems having three or more central gears} · CPC title

• F16H2057/02078

  for wind turbines · CPC title

• F16H57/08 Primary

  of gearings with members having orbital motion · CPC title

• F16H57/082 Primary

  Planet carriers · CPC title