Epicyclic gearing, in particular reduction gearing with an integrated spur gear differential

Patent metadata

Field	Value
Publication number	US-10935119-B2
Application number	US-201716326075-A
Country	US
Kind code	B2
Filing date	Jul 31, 2017
Priority date	Sep 6, 2016
Publication date	Mar 2, 2021
Grant date	Mar 2, 2021

Abstract

An epicyclic gearing that includes a first set of planet gears arranged on a first planet gear plane, a second set of planet gears arranged on a second planet gear plane, and a planet carrier configured to circulate about a gear axis and including a carrier wall that extends between the first planet gear plane and the second planet gear plane in an intermediate region, and the planet carrier further includes planet pins configured to mount the first or second set of planet gears, wherein a web structure is attached to the carrier wall, wherein the web structure extends in the direction of the gear axis, wherein the web structure includes a support structure that extends radially in relation to the gear axis, and a support structure that includes a hole for receiving a section of a planet gear pin.

First claim

The invention claimed is:

1. An epicyclic gearing, comprising: first planet gears in a first planet gear plane, second planet gears in a second planet gear plane a planet carrier that revolves about a gearing axis, comprising a carrier wall extending in an intermediate space between the first planet gear plane and the second planet gear plane, and one or more planet gear pins for supporting the first or second planet gears,
wherein the carrier wall supports a web structure, which extends in a direction of the gear axis, the web structure supports a support structure that extends radially in relation to the gear axis, the support structure has a hole for receiving a section of one of the planet gear pins, wherein the one of the planet gear pins forms an axial excess on a side of the support structure facing away from the carrier wall, and this excess enters in a hole in a carrier plate, which is placed on the support structure, wherein the web structure and the support structure form a pocket supported by the carrier wall, wherein the web structure forms a pocket wall of the pocket that extends axially, and the support structure forms a pocket base in an end region facing away from the carrier wall, which closes off the pocket.

2. The epicyclic gearing of claim 1 , wherein a second planet gear of the second planet gear plane is received in the respective pocket, and the carrier plate forms a cover element, which is placed on the pocket bases on respective cover seating surfaces facing away from an interior of the pocket.

3. The epicyclic gearing of claim 2 , wherein the planet carrier comprises a first carrier wall section, a second carrier wall section, and a third carrier wall section, wherein the first and second carrier wall sections, and pocket walls and the pocket base are formed by a single-piece base element, and the third carrier wall section is formed by the carrier plate, which is placed on the pocket base provided by the base element.

4. The epicyclic gearing of claim 3 , wherein the carrier wall corresponds to the second carrier wall section and is located axially between the first and second carrier wall sections.

5. The epicyclic gearing of claim 4 , wherein the base element is made of a casting compound.

6. The epicyclic gearing of claim 5 , wherein the second planet gear plane accommodates components of a spur gear differential gearing in an intermediate space laying between the pocket.

7. The epicyclic gearing according to claim 6 , wherein the pocket bases extend on an axial level in which a sun gear of the spur gear differential gearing is located.

8. The epicyclic gearing of claim 7 , wherein the cover element closes off the second planet gear plane.

9. The epicyclic gearing of claim 8 , wherein the pocket forms a structure with a U-shaped radial cross section, and the second planet gear received therein is a spur gear, including toothing of which is partially exposed in the second planet gear plane toward a circumference of the base element, or in that this planet gear meshes radially with a hollow shaft from the inside, which extends into the second planet gear plane, and/or in that the planet gear received in a respective pocket is coupled to a planet gear sharing the same axis of rotation in the first planet gear plane for conjoint rotation therewith.

10. An epicyclic gearing, comprising:
a first set of planet gears arranged on a first planet gear plane;
a second set of planet gears arranged on a second planet gear plane;
a planet carrier configured to circulate about a gear axis and including a carrier wall that extends between the first planet gear plane and the second planet gear plane in an intermediate region, wherein the second planet gear plane accommodates components of a spur gear differential gearing in an intermediate space laying between a pocket, and the planet carrier further includes one or more planet gear pins configured to mount the first and second set of planet gears, wherein a web structure is attached to the carrier wall, wherein the web structure extends in a direction of the gear axis and includes a support structure with a hole for receiving a section of one of the planet gear pins, wherein the web structure includes a support structure that includes a bore configured to receive a portion of one of the planet gear pins.

11. The epicyclic gearing of claim 10 , wherein one of the planet gear pins forms an axial projection on a support structure side facing away from the carrier wall, and the projection penetrates a bore of a support plane that rests against the support structure.

12. The epicyclic gearing of claim 10 , wherein the planet carrier includes a first, second, and third carrier wall section, wherein the first carrier wall section and the second carrier wall section may be formed by a base element as an integral part thereof, and the third carrier wall section is formed by a carrier plate placed on the integral component.

13. The epicyclic gearing of claim 12 , wherein the first and second planet gears are supported on one or more planet gear pins received in holes in a base element with a precision fit.

14. The epicyclic gearing of claim 12 , wherein the base element is designed such that a respective pocket base has a receiving hole configured to allow a corresponding section of one of the planet gear pins to be seated.

15. An epicyclic gearing, comprising:
a first set of planet gears arranged on a first planet gear plane;
a second set of planet gears arranged on a second planet gear plane;
a planet carrier configured to circulate about a gear axis and including a carrier wall that extends between the first planet gear plane and the second planet gear plane in an intermediate region, and the planet carrier further includes one or more planet gear pins configured to mount the first or second set of planet gears, wherein a web structure is attached to the carrier wall, wherein the web structure extends in the direction of the gear axis and includes a support structure that extends radially in relation to the gear axis and that includes a hole for receiving a section of one of the one or more planet gear pins, wherein the one of the one or more planet gear pins forms an axial excess on a side of the support structure facing away from a support wall, wherein the support structure includes a bore configured to receive a portion of one of the planet gear pins wherein the web structure and the support structure form a pocket supported by the carrier wall, wherein the web structure forms a pocket wall of the pocket that extends axially, and the support structure forms a pocket base in an end region facing away from the carrier wall, which closes off the pocket.

16. The epicyclic gearing of claim 14 , wherein the excess passes through a hole in a carrier plate placed on the support structure.

17. The epicyclic gearing of claim 16 , wherein the second planet gear plane accommodates components of a spur gear differential gearing in an intermediate space laying between the pocket.

Assignees

• Schaeffler Technologies Ag

Inventors

• Kurth Franz
• Goetz Manfred
• Schimpf Ralph

Classifications

• F16H57/082

  Planet carriers · CPC title

• F16H48/11

  having intermeshing planet gears · CPC title

• F16H2048/106

  characterised by two sun gears · CPC title

• F16H48/40 Primary

  characterised by features of the rotating cases · CPC title