# US 8,308,602 B2 · Gear mounting

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- Number: US 8,308,602 B2
- Document ID: US8308602B2
- Status: Granted
- Kind: B2
- Application number: 11/993,581
- Filed: 2006-07-06
- Published: 2010-04-01
- Granted: 2012-11-13
- Earliest claimed: 2005-07-08
- Assignees: Orbital2 Limited
- Inventors: Raymond John Hicks
- Web page: https://patentgrep.com/patent/US8308602B2

## CPC

- F16H 1/2836: {by allowing limited movement of the planet gears relative to the planet carrier or by using free floating planet gears}
- F16H 57/021: Shaft support structures, e.g. partition walls, bearing eyes, casing walls or covers with bearings
- F16H 57/082: {Planet carriers}
- Y10T 74/19633: Yieldability in gear trains
- F16H: GEARING
- Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

## Abstract

A gear mounting has a spindle (11) extending substantially normal to a carrier (12) and capable of radial excursions from an initial position, when under load. The spindle and carrier have generally conical abutment surfaces (23, 24) normals to which extend substantially through the centroid of a projecting portion of the spindle, and in the initial position of the spindle there is a gap between the abutment surfaces.

## Claims

### Claim 1

A gear mounting having a spindle extending substantially normal to a carrier and capable of radial excursions from an initial position, when under load, characterised in that the spindle and carrier have generally frusto-conical abutment surfaces, normals to which extend substantially through the centroid of a projecting portion of the spindle and in that in the initial position of the spindle there is a gap between the abutment surfaces, said gap being sufficiently dimensioned to allow the spindle to be stressed in bending only up to a pre-determined load, such that when the pre-determined load is reached or exceeded, the abutment surfaces will engage to generate a reaction load whereby the spindle is stressed in tension and bending.

### Claim 2 (depends on 1)

A gear mounting as claimed in claim 1 wherein the spindle is cantilevered from the carrier and includes radially inner and outer members and wherein the spindle abutment surface is on the outer member.

### Claim 3 (depends on 2)

A gear mounting as claimed in claim 2 wherein, the inner member is a tension bolt.

### Claim 4 (depends on 1)

A gear mounting as claimed in claim 1 wherein the carrier includes a ring or generally annular insert, which defines the abutment surface on the carrier.

### Claim 5 (depends on 3)

A gear mounting as claimed in claim 3, wherein the tension bolt is surrounded by a sleeve.

### Claim 6 (depends on 1)

A gear box including one or more gear mountings as claimed in claim 1.

### Claim 7

A gear mounting having:
a spindle extending substantially normal to a carrier and capable of radial excursions from an initial position, when under load, characterised in that the spindle and carrier have generally frusto-conical abutment surfaces, normals to which extend substantially through the centroid of a projecting portion of the spindle, and in that in the initial position of the spindle there is a gap between the abutment surfaces, said gap configured to allow the spindle to be stressed in bending only up to a predetermined load;
wherein the abutment surfaces are configured to engage each other at or above the predetermined load to generate a reaction load whereby the spindle is stressed in tension and bending.

### Claim 8 (depends on 7)

A gear mounting as claimed in claim 7, wherein the spindle is cantilevered from the carrier and includes radially inner and outer members and wherein the spindle abutment surface is on the outer member.

### Claim 9 (depends on 8)

A gear mounting as claimed in claim 8, wherein the inner member is a tension bolt.

### Claim 10 (depends on 9)

A gear mounting as claimed in claim 9, wherein the tension bolt is surrounded by a sleeve.

### Claim 11 (depends on 7)

A gear mounting as claimed in claim 7, wherein the carrier includes a ring or generally annular insert, which defines the abutment surface on the carrier.

### Claim 12 (depends on 7)

A gear box including one or more gear mountings as claimed in claim 7.