Drive

Patent metadata

Field	Value
Publication number	US-11719328-B2
Application number	US-202117154629-A
Country	US
Kind code	B2
Filing date	Jan 21, 2021
Priority date	Jun 6, 2014
Publication date	Aug 8, 2023
Grant date	Aug 8, 2023

Abstract

The present invention relates to a drive for reaching a desired position of a component such as of a rotor blade, a crane tower, a superstructure and the like, having at least two drive elements that are in toothed engagement with one another and of which at least one is drivable from a drive source and the other is connectable to the component, and having a lubricating device for lubricating the drive elements, wherein at least one lubricant passage for the supply of lubricant to a meshing tooth pair is led through one of the drive elements. It is proposed to effect the supply of the lubricant by a distributor that is connected upstream of the lubricant passage integrated in the drive element and to control the connection between a supply passage of the distributor and the at least one lubricant passage integrated in the drive element by a relative movement between the drive element and the distributor.

First claim

We claim:

1. A drive for reaching a desired position of a component comprising a rotor blade, a crane tower, or a superstructure, the drive comprising:
two mutually meshing drive elements comprising a first drive element and a second drive element, wherein the first drive element and/or the second drive element is drivable from a drive source via a transmission on a drive source side of the two mutually meshing drive elements, and wherein the second drive element is connectable to the component; and
a lubrication apparatus, wherein the first drive element and/or the second drive element have lubricant passages for supplying a lubricant to a meshing tooth pair,
wherein the lubrication apparatus has a distributor having a supply passage connectable to the lubricant passages, wherein the first drive element and/or the second drive element is movable relative to the distributor such that the lubricant passages are connected to the supply passage or are disconnected from the supply passage according to the position of the first drive element and/or the second drive element relative to the distributor,
wherein the lubricant passages are spaced apart from one another such that a first lubricant passage of the lubricant passages is selectively connectable to the supply passage and a second lubricant passage of the lubricant passages is selectively disconnectable from the supply passage by a movement of the first drive element and/or the second drive element relative to the distributor,
wherein a contour of an opening of the supply passage and a respective position and contour of the lubricant passages are coordinated with one another such that, on the movement of the first drive element and/or the second drive element relative to the distributor, at least one of the lubricant passages is always connected to the supply passage and at most two of the lubricant passages are always simultaneously connected to the supply passage,
wherein the distributor is suppliable with the lubricant from a side of the two mutually meshing drive elements opposite the drive source side via a lubricant cap, wherein the lubricant cap at least partly surrounds one or more of the lubricant passages, wherein the lubricant cap is rotationally fixed, and wherein the distributor is rotationally fixedly supported by the lubricant cap,
wherein the lubricant cap surrounds the first drive element at an axial side and at an outer peripheral side and extends from a drive element side opposite the drive source side to a transmission housing positioned at the drive source side,
wherein the lubricant cap is sealingly attached to the transmission housing,
wherein the lubricant cap envelopes a section of the second drive element meshing with the first drive element, and
wherein the lubricant cap is sealed with respect to the section of the second drive element meshing with the first drive element by a seal between the lubricant cap and the second drive element.

2. The drive of claim 1 , wherein the distributor is sealed from the first drive element and/or the second drive element by a sealing element such that the lubricant is only flowable through the supply passage via the lubricant passages connected to the supply passage.

3. The drive of claim 1 , wherein at least one of the lubricant passages opens into a dedendum region of at least one of the two mutually meshing drive elements.

4. The drive of claim 1 , wherein the distributor is rotationally fixed, and wherein the supply passage is aligned such that the opening of the supply passage faces a spatial region in which one of the two mutually meshing drive elements meshes with the other of the two mutually meshing drive elements.

5. The drive of claim 1 , wherein the lubricant passages comprise three or more lubricant passages, wherein at least one of the three or more lubricant passages is always connected to the supply passage, wherein at most two of the three or more lubricant passages are simultaneously connected to the supply passage, wherein at least one of the two mutually meshing drive elements has an inner recess in which the distributor is at least partly received, wherein each of the three or more lubricant passages has an inlet opening, wherein at least one of the inlet openings of the three or more lubricant passages is at a peripheral surface of the inner recess or at a peripheral surface of the distributor according to the position of the lubricant passages relative to the distributor, wherein the opening of the supply passage is on a peripheral side of the distributor, and wherein the opening of the supply passage is in simultaneous communication with at most two inlet openings of the three or more lubricant passages according to the position of the lubricant passages relative to the distributor.

6. The drive of claim 1 , wherein the lubricant cap comprises a cover plate.

7. The drive of claim 1 , wherein the seal between the lubricant cap and the second drive element comprises at least one of a labyrinth seal and a sliding seal.

8. The drive of claim 1 , wherein the supply line extends outside and along a front plate of the lubricant cap and enters into and extends through the front plate at a section of the front plate abutting a distributor support.

Assignees

• Liebherr Components Biberach Gmbh

Inventors

• Paal Martin
• Wack Frowin
• Hausladen Norbert

Classifications

• F16H57/0423 Primary

  Lubricant guiding means mounted or supported on the casing, e.g. shields or baffles for collecting lubricant, tubes or pipes · CPC title

• F16H57/043

  within rotary parts, e.g. axial channels or radial openings in shafts · CPC title

• F16H57/046

  Oil-mist or spray lubrication · CPC title

• F16H57/0431 Primary

  Means for guiding lubricant directly onto a tooth surface or to foot areas of a gear, e.g. by holes or grooves in a tooth flank · CPC title

• F16H57/0456

  Lubrication by injection; Injection nozzles or tubes therefor (oil mist or spray lubrication F16H57/0458) · CPC title