Lubricant device and method for supplying lubricant to a planet carrier of a planetary gearset

Patent metadata

Field	Value
Publication number	US-12264736-B2
Application number	US-202418659727-A
Country	US
Kind code	B2
Filing date	May 9, 2024
Priority date	May 12, 2023
Publication date	Apr 1, 2025
Grant date	Apr 1, 2025

Abstract

A lubricant device is configured for supplying lubricant to a planetary carrier of a planetary gearset. A planetary bolt passes through and extends beyond an opening in the planetary carrier to form an axially projecting end area. A collecting tray is configured for guiding lubricant to flow along the collecting tray to the planetary bolt during use. The collecting tray has an annular intermediate element fixed to the collecting tray when assembled, and which faces axially toward the planetary carrier. The intermediate element has first and second radial projections that are spaced axially. At its projecting end area, the planetary bolt has corresponding spaced first and second fixing contours, enabling the first radial projection to be latched into the first fixing contour and the second radial projection to be latched into the second fixing contour to form an axially secure arrangement of the collecting tray and the planetary bolt.

First claim

The invention claimed is:

1. A lubricant device configured for supplying lubricant to a planetary carrier of a planetary gearset having a planetary carrier defining an opening the lubricant device comprising:
at least one planetary bolt which passes through and extends beyond the openingin the planetary carrier so that at a front end of the at least one planetary bolt has an axially projecting end area;
a collecting tray configured for guiding lubricant which, in an operating condition, flows along the collecting tray to the at least one planetary bolt; and
an annular intermediate element which, in an assembled condition, is fixed axially onto the collecting tray facing in a direction of the planetary carrier, wherein the annular intermediate element has a first radial projection and a separate second radial projection a distance away in the axial direction,
and wherein the planetary bolt has at its axially projecting end area a corresponding first fixing contour and a second fixing contour a distance away in the axial direction, in order to latch the first radial projection of the annular intermediate element into the first fixing contour to produce an arrangement secure against rotation and in order to latch the second radial projection into the second fixing contour to produce an axially secure arrangement of the collecting tray and the planetary bolt.

2. The lubricant device according to claim 1 , wherein the first fixing contour is in the form of a flat step at an extreme axial end of the axial end area of the planetary bolt, and wherein the first radial projection has a flat contact surface corresponding thereto.

3. The lubricant device according to claim 2 , wherein the first radial projection is trapezium-shaped or rectangular, with the corresponding flat contact surface.

4. The lubricant device according to claim 2 , wherein the flat contact surface is beveled by a chamfer, so that assembly is carried out by rotating the collecting tray to enable the simple latching of the flat contact surface in the first fixing contour in the form of a flat step.

5. The lubricant device according to claim 1 , wherein the second fixing contour is in the form of a groove.

6. The lubricant device according to claim 5 , wherein radially at its end the second projection is uniformly convex, with a curvature, such that the curvature corresponds essentially to an existing planetary bolt curvature of the planetary bolt.

7. The lubricant device according to claim 6 , wherein the second radial projection is beveled by a chamfer, so that assembly is carried out by rotating the collecting tray to enable the simple latching of the convexly shaped second projection into the second fixing contour in the form of a groove.

8. The lubricant device according to claim 1 , wherein the first radial projection and the second radial projection are arranged axially apart one behind the other.

9. The lubricant device according to claim 1 , comprising a plurality of planetary bolts arranged in a circle, wherein each planetary bolt of the plurality of planetary bolts analogously has at its axially projecting end area a corresponding first fixing contour and a second fixing contour axially a distance away, wherein the intermediate element has, respectively arranged correspondingly thereto, a first radial projection and a separate, second radial projection a distance away in the axial direction, to enable latching in each case of the first radial projection of the annular intermediate element into the respective first fixing contour to form a rotationally secure arrangement and to enable latching in each case of the second radial projection into the respective second fixing contour to form an axially secure arrangement of the collecting tray and the planetary bolts.

10. The lubricant device according to claim 1 , wherein the collecting tray defines at least one overflow opening to limit the amounts of lubricant in the collecting tray.

11. The lubricant device according to claim 10 , wherein the planetary bolt defines a blind-hole bore for receiving the lubricant and the at least one overflow opening is arranged radially under the blind-hole bore in the collecting tray.

12. The lubricant device according to claim 1 , wherein the collecting tray is in the form of a flat circle, and blades are arranged radially inside on the collecting tray for producing a suction force that acts upon the lubricant.

13. The lubricant device according to claim 12 , wherein the blades are arranged equidistantly all around the collecting tray.

14. The lubricant device according to claim 1 , wherein the first and second radial projections are made of metal and are fixed on the intermediate element.

15. A method for assembling a lubricant device for supplying lubricant to a planetary carrier of the planetary gearset, the said method comprising the following steps:
preparing at least one planetary bolt, which is passed through and extends beyond an opening of the planetary carrier so that at the front an axially projecting end area is formed, and wherein the planetary bolt, at its axially projecting end area, has a first fixing contour and a second fixing contour a distance away in the axial direction;
preparing an annular collecting tray for guiding lubricant that during operation flows along the collecting tray to the planetary bolt, wherein the collecting tray has an annular intermediate element which is arranged on the collecting tray facing axially toward the planetary carrier, wherein the intermediate element has a first radial projection and a separate, second radial projection a distance away in the axial direction;
arranging the collecting tray in such manner that the first projection and the second projection are an angular distance away from the first fixing contour and the second fixing contour, respectively; and
rotating the collecting tray so as to latch the first radial projection of the annular intermediate element into the first fixing contour to form a rotationally secure arrangement, and so as to latch the second radial projection into the second fixing contour to form an axially secure arrangement of the collecting tray and the planetary bolts.

Assignees

• Zahnradfabrik Friedrichshafen

Inventors

• Junk Alfred

Classifications

• F16H57/04

  Features relating to lubrication or cooling {or heating} (control of lubrication or cooling in hydrostatic gearing F16H61/4165) · CPC title

• F16H57/082

  Planet carriers · CPC title

• F16H57/0482 Primary

  Gearings with gears having orbital motion · CPC title

• F16H57/0479 Primary

  Gears or bearings on planet carriers · CPC title