Nut And/Or Bolt Head With Jackscrew Actuated Lock Washer Stack

摘要

A jackscrew nut and/or bolt head assembly includes a load washer that may be selectively engaged via the jackscrews. Spherical faces at the washer top are held in alignment with corresponding spherical jackscrew bottoms via axially interlocking pins. The pins may partially extend radial beyond the circumference of the main body of the nut and/or bolt head thereby defining ridges of an outside tool access profile. The assembly may be initially tightened via a primary torque induced onto the pins and the main body. Final tightening and load setting may be provided via the jackscrews whereby a lock feature of the load washer may be engaged and the assembly secured against inadvertent loosening. The load washer may be part of a lock washer stack including a lock washer. The interface between the lock and load washer may be configured for ratchet locking and/or helical wedge locking of the central thread.

主权项

1. A lock washer stack comprising:
a. a load washer comprising:
i. a first washer top and a first washer bottom;ii. a first washer through hole;iii. a spherical face that is on said first washer top and that is rotationally symmetric with respect to a contact axis adjacent said washer through hole;iv. a first ratchet feature that is on said first washer bottom; b. a lock washer comprising:
i. a second washer top and a second washer bottom;ii. a second ratchet feature that is on said second washer top; andiii. a lock feature that is on said second washer bottom; andwherein said second ratchet feature and said first ratchet feature have a mating ratcheting configuration such that upon unloaded contact between said first washer bottom and said second washer top said load washer is rotationally unrestricted with respect to said lock washer and such that said load washer is rotationally restricted with respect to said lock washer upon loaded contact between said first washer bottom and said second washer top, said loaded contact being via said spherical face and via said second washer bottom.