GB2177178A

GB2177178A - Adjustable locknut

Info

Publication number: GB2177178A
Application number: GB08516361A
Authority: GB
Inventors: Andreas Gutt
Original assignee: Individual
Current assignee: Individual
Priority date: 1985-06-28
Filing date: 1985-06-28
Publication date: 1987-01-14
Also published as: GB8516361D0

Abstract

An adjustable locknut is a one piece locking device wherein the locking of the nut onto its mating shaft or spindle is performed by means of socket set screws pressing threaded parts of the adjustable locknut onto the mating threads of the shaft or spindle. The socket set screws keep a part of the adjustable locknut under constant tension. <IMAGE>

Description

SPECIFICATION Adjustable locknut This invention relates to locking nuts and is concerned more particularly with the locking of nuts in any position to which they are adjusted upon a spindle or shaft by means of socket set screw and pads.

A practised method of doing this is to use a lead pad-a soft material to prevent damage to the threads of the spindle or shaft onto which it is pressed by the said socket set screw as for example on B.S. 4185: Part 1: 1967, Machine Tool Components, Part 1.

Locknuts ('C' type, socket set screw locking).

The drawback of this method is that during the tightening process of the socket set screw the lead pad is also forced into the clearance space of the effective diameter and the truncation of the threads of the spindle or shaft and nut adjacent to its hole.

This obstacle causes difficulties during the adjustment and unscrewing of the nut because free withdrawal of the pad out of its hole is prevented to allow for a free rotation of the nut to take place.

This invention comprises a locknut and a number of socket set screws.

On the not load bearing face, the locknut is furnished with a face groove of approximately 4 mm wide. The groove is located into the locknut wall in such a manner as to result in the outer part of the wall being thicker than the inner part.

A number of tapped holes are machined through the outer locknut wall in such a manner as to result in the said socket set screw, after being inserted into the tapped holes on being tightened up, pressing the inner locknut wall onto the mating threads of the shaft or spindle and locking takes place.

As the inner locknut wall takes the place and function of the load pad, but is also a part of the locknut itself, upon loosening the socket set screws unlocking of the nut from the shaft or spindle is achieved and adjusting or unscrewing of the locknut is now possible.

I, Andreas Gutt, Claim novelty to: 1. The construction and method of locking an adjustable locknut onto a shaft or spindle by using a number of socket set screws or similar screws creating a one piece instalation locking device.

2. The construction and method of locking an adjustable locknut as claimed in Claim 1 wherein the locking pad is part of the locknut body itself.

3. The construction and method of locking an adjustable locknut as claimed in Claim 1 or Claim 2 wherein the locknut material is softer than that of the mating shaft or spindle.

4. The construction and method of locking an adjustable locknut as claimed in Claim 1 or Claim 2 wherein the locknut material is of the same hardness as that of the mating shaft or spindle.

5. The construction and method of locking an adjustable locknut as claimed in Claim 1 or Claim 2 or Claim 3 or Claim 4 wherein the socket set screws or similar screws are held against loosening.

6. The construction and method of locking an adjustable locknut substantially as described herein with reference to Fig. 1.

**WARNING** end of DESC field may overlap start of CLMS **.

Claims

**WARNING** start of CLMS field may overlap end of DESC **. SPECIFICATION Adjustable locknut This invention relates to locking nuts and is concerned more particularly with the locking of nuts in any position to which they are adjusted upon a spindle or shaft by means of socket set screw and pads. A practised method of doing this is to use a lead pad-a soft material to prevent damage to the threads of the spindle or shaft onto which it is pressed by the said socket set screw as for example on B.S. 4185: Part 1: 1967, Machine Tool Components, Part 1. Locknuts ('C' type, socket set screw locking). The drawback of this method is that during the tightening process of the socket set screw the lead pad is also forced into the clearance space of the effective diameter and the truncation of the threads of the spindle or shaft and nut adjacent to its hole. This obstacle causes difficulties during the adjustment and unscrewing of the nut because free withdrawal of the pad out of its hole is prevented to allow for a free rotation of the nut to take place. This invention comprises a locknut and a number of socket set screws. On the not load bearing face, the locknut is furnished with a face groove of approximately 4 mm wide. The groove is located into the locknut wall in such a manner as to result in the outer part of the wall being thicker than the inner part. A number of tapped holes are machined through the outer locknut wall in such a manner as to result in the said socket set screw, after being inserted into the tapped holes on being tightened up, pressing the inner locknut wall onto the mating threads of the shaft or spindle and locking takes place. As the inner locknut wall takes the place and function of the load pad, but is also a part of the locknut itself, upon loosening the socket set screws unlocking of the nut from the shaft or spindle is achieved and adjusting or unscrewing of the locknut is now possible. CLAIMS I, Andreas Gutt, Claim novelty to:

1. The construction and method of locking an adjustable locknut onto a shaft or spindle by using a number of socket set screws or similar screws creating a one piece instalation locking device.