ARRANGEMENT FOR RELEASABLY HOLDING A COMPONENT IN A FIXED POSITION ON A SHAFT

• US 20090131182A1
• Filed: 11/19/2007
• Published: 05/21/2009
• Est. Priority Date: 11/19/2007
• Status: Active Grant

• Current Assignee: Pratt & Whitney Canada Corporation (Raytheon Technologies Corporation d/b/a RTX)
• Original Assignee: Pratt & Whitney Canada Corporation (Raytheon Technologies Corporation d/b/a RTX)
• Inventors: Huppe, Roger, BLAIS, DANIEL
• Granted Patent: US 7,704,029 B2
• Time in Patent Office: Days
• US Class Current: 464/182
• CPC Class Codes: F16D 1/06 for attachment of a member on a shaft or on a shaft-end attachment of marine propellers on shafts B63H23/34
• CPC Class Codes: F16D 1/076 by clamping together two faces perpendicular to the axis of rotation, e.g. with bolted flanges
• CPC Class Codes: Y10T 29/53978 including means to relatively position plural work parts

Abstract

The arrangement comprises parts coaxially mounted on the shaft, the parts including: a lockplate in rotational engagement with the shaft, the lockplate having a first side and a second side, the first side of the lockplate being in engagement with the component; a nut in threaded engagement with the shaft, the nut having a circumferential outer groove, a side of the nut being in pressing engagement with the second side of the lockplate; a damping element mounted in the groove and partially outwardly protruding therefrom; a lockwasher provided around the nut and in rotational engagement with the lockplate, the lockwasher having an interior surface in interfering engagement with the damping element; and a retaining element connected to the nut and to the lockwasher, the retaining element preventing the lockwasher from moving away from the lockplate.

Claims

1. An arrangement for releasably holding a component in a fixed position on a shaft, the arrangement comprising parts coaxially mounted on the shaft, the parts including:

a lockplate in rotational engagement with the shaft, the lockplate having a first side and a second side, the first side of the lockplate being in engagement with the component;

a nut in threaded engagement with the shaft, the nut having a circumferential outer groove, a side of the nut being in pressing engagement with the second side of the lockplate;

a damping element mounted in the groove and partially outwardly protruding therefrom;

a lockwasher provided around the nut and in rotational engagement with the lockplate, the lockwasher having an interior surface in interfering engagement with the damping element; and

a retaining element connected to the nut and to the lockwasher, the retaining element preventing the lockwasher from moving away from the lockplate.

2. The arrangement as defined in claim 1, wherein the rotational engagement between the lockplate and the shaft includes tabs projecting inwardly and cooperating with longitudinally-extending corresponding grooves provided on the shaft.

3. The arrangement as defined in claim 1, wherein the rotational engagement between the lockwasher and the lockplate includes a plurality of spaced-apart and axially-projecting tabs cooperating with corresponding grooves provided on the lockplate.

4. The arrangement as defined in claim 3, wherein the grooves of the lockplate are provided at a periphery thereof.

5. The arrangement as defined in claim 1, wherein the retaining element includes a ring.

6. The arrangement as defined in claim 5, wherein the ring is held between tabs projecting from the lockwasher and the nut.

7. The arrangement as defined in claim 1, wherein the damping element is made of an elastomeric material.

8. A holding arrangement for a component to be mounted on a shaft, the arrangement comprising:

a lockplate;

means for preventing rotation of the lockplate with reference to the shaft;

a nut to be mounted adjacent to the lockplate;

means for securing the nut in a threaded engagement on the shaft;

a lockwasher to be mounted around the nut;

means for preventing rotation of the lockwasher with reference to the shaft;

a resilient ring to be mounted between the nut and the lockwasher; and

means for preventing the lockwasher from moving away from the lockplate.

9. The holding arrangement as defined in claim 8, wherein the means for preventing rotation of the lockplate with reference to the shaft include tabs projecting inwardly and cooperating with longitudinally-extending corresponding grooves provided on the shaft.

10. The holding arrangement as defined in claim 8, wherein the means for preventing rotation of the lockwasher with reference to the shaft include a plurality of spaced-apart and axially-projecting tabs cooperating with corresponding grooves provided on the lockplate.

11. The holding arrangement as defined in claim 10, wherein the grooves of the lockplate are provided at a periphery thereof.

12. The holding arrangement as defined in claim 8, wherein the means for preventing the lockwasher from moving away from the lockplate include a retaining element linking the lockwasher and the nut.

13. The holding arrangement as defined in claim 12, wherein the retaining element includes a ring.

14. The holding arrangement as defined in claim 13, wherein the ring is held between tabs projecting from the lockwasher and the nut.

15. The holding arrangement as defined in claim 8, wherein the resilient ring is made of an elastomeric material.

16. The holding arrangement as defined in claim 15, wherein the resilient ring is a one-piece element.

17. A method of securing one side of a component mounted on a shaft, the method comprising:

inserting a lockplate on the shaft and engaging the lockplate against the side of the component, the lockplate being prevented from rotating with reference to the shaft;

inserting a nut on the shaft and pressing the nut against the lockplate on a side of the lockplate that is opposite the component, the nut being threaded on the shaft prior to engagement with the lockplate;

inserting a resilient element around the nut;

inserting a lockwasher around the nut and the resilient element; and

inserting a ring between the nut and the lockwasher.

18. The method as defined in claim 17, wherein the component is located in a gas turbine engine.

19. The method as defined in claim 18, wherein the component is a bearing.

20. The method as defined in claim 17, wherein inserting the lockplate on the shaft includes sliding the lockplate from an end of the shaft while the lockplate is prevented from rotating with reference to the shaft.