US 3,942,570 AGranted

Mechanism for securing a nut against loosening

AssigneeHi-Shear Corporation

InventorsHarry L. Bochman, Jr., George S. Wing

Life of this patent

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Abstract

There are disclosed nut locking assemblies comprising a washer adapted to slide over a spindle and be keyed to it, and a lock-ring to the rear of the washer and secured to the washer against relative rotation. The nut abuts the washer. The lock-ring is slidable axially so that in a forward position it is disengaged from the nut but in a rearward position serrations on the lock-ring engage corresponding serrations on the nut to lock the nut against rotation. An annular space between the washer and the lock-ring contains a resilient ring which can be strained to alter its diameter. In its normal unstrained condition this ring holds the lock-ring in its locking position. When it is desired to move the lock-ring to its unlocked position it is pushed forward to disengage the serrations of the lock-ring from those of the nut. This strains the resilient ring to a different diameter so that when the pressure is removed from the resilient ring it resumes its original unstrained diameter to push the lock-ring back into engagement with the nut, thereby locking it against rotation.

Claims17

Dependent claims

Mechanism for locking a nut on a threaded spindle having a central longitudinal axis, comprising:

a washer member adapted to fit over said spindle, having a rear face and washer engaging means;
means for keying said washer member to said spindle so that the washer member cannot rotate but can slide axially relative to said spindle;
a lock-ring member having a forward face rearward of, and spaced from, and facing, said rear face of said washer member, so that there is an annular space between the lock-ring member and the washer member said lock-ring member having lock-ring engaging means at least part of which engages said washer engaging means;
at least one of said washer and lock-ring members having a portion bordering said annular space which is slanted obliquely radially and axially;
a threaded nut adapted to thread on the threaded spindle, having a rear portion for engagement by a wrench and an annular forward portion protruding forwardly from the rear portion to a position between the spindle and at least part of the lock-ring member and adapted to abut the washer member, said forward portion having nut engaging means extending radially outward and adapted to engage at least part of said lock-ring engaging means,
a resiliently strainable ring whose diameter can be enlarged and contracted, within said annular space and adapted to engage said obliquely slanted portion;
whereby when pressure is applied to the lock-ring member in the forward direction the lock-ring member moves axially forward to disengage its lock-ring engaging means from said nut engaging means and the diameter of the strainable ring is altered by camming action on the obliquely slanted portion, whereupon the nut can be turned on the spindle, and when said pressure is released the strainable ring returns to its normal unstrained unstrained diameter and pushes the lock-ring member rearwardly to a position where the lock-ring engaging means engages the nut engaging means, thereby locking the nut.

4 more elements

Mechanism for locking a nut on a threaded spindle having a central longitudinal axis, comprising:

a washer adapted to fit over said spindle, having an outer portion provided with washer-engaging means;
means for keying said washer to said spindle so that the washer cannot rotate but can slide axially relative to said spindle;
a lock-ring having a forward face rearward of, and spaced from said washer, said forward face having an inner hub portion adapted to be placed around said spindle behind the washer and having an outer portion provided with a first portion of a lock-ring engaging means;
said hub portion having a second portion of said lock-ring engaging means extending radially inward;
at least one of said outer portions slanting obliquely outward, and toward, and meeting, the other outer portion so that said washer-engaging means engages said first portion of the lock-ring engaging means;
a threaded nut adapted to thread on the threaded spindle and having a forward portion comprising an annulus around the spindle and within the hub of the lock-ring and adapted to abut the washer, and having nut engaging means extending radially outward and adapted to engage said second portion of said lock-ring engaging means, there being an annular space between the lock-ring and the washer located radially inward from the position of engagement of the washer engaging means with said first portion of the lock-ring engaging means and radially outward from the hub of the nut;
a resiliently strainable ring whose diameter can be enlarged and contracted, within said annular space;
whereby when pressure is applied to the lock-ring in the forward direction the lock-ring moves axially forward to disengage said second portion of the lock-ring engaging means and the diameter of the strainable ring is contracted by camming action from said obliquely slanted portions, whereupon the nut can be turned on the spindle, and when said pressure is released the strainable ring returns to its normal larger diameter and pushes the lock-ring rearwardly to a position where said second portion of the lock-ring engaging means engages the nut engaging means, thereby locking the nut.

5 more elements

Dependencies are inferred from the claim text.

Facts

Application: 05/524,224Filed 15 Nov 1974 · continuation in part
Priority: 24 Sep 1973
Granted: 9 Mar 1976
Term ends: Not estimatedThe source records don’t support an estimate.

Classification8 codes

F16C 25/06
Bearings for exclusively rotary movement adjustable for wear or play: ball or roller bearings
F16B 39/10
In which the locking takes place after screwing down: by a plate, spring, wire or ring immovable with regard to the bolt or object and mainly…
F16C 35/063
Mounting or dismounting of ball or roller bearings; Fixing them onto shaft or in housing: fixing them on the shaft
F16C 19/364
With a single row of rollers: with tapered rollers, i.e. rollers having essentially the shape of a truncated cone