Do the multi-stage push fastener replace the traditional bolt and nut?
Posttime: 2019-11-18 14:29:19From:Ruian JingGongViews: 9356 clicks
Bolt and nut are common parts in our machinery. They are also cylindrical fasteners with thread for bolts. Bolts need to be matched with nuts for fastening and connecting two parts with through holes. This connection form is called bolt connection. However, a recently discovered design called super bolt is considered to replace traditional nuts and bolts.
Will traditional bolts and nuts be eliminated?
Lets see if the specific design of this super bolt can really replace the connection of traditional bolts and nuts.
What is a super bolt?
Its device can be screwed to a new or existing bolt, stud, screw or shaft. Once in place, the actual tensioning of the bolt or stud is achieved by simply tightening the push screw around the main thread with a simple hand tool. The jacking screw uniformly transmits the preload to the main thread, and thus to the connector. Super bolt can also be called multi-stage push connection fastener, which can pre tighten large workpieces and reliably prevent them from loosening without special devices or special tools.
However, even if the common bolt is processed again, there must be a coaxiality error of about 0.01mm in the middle, which is the source of the shear force. What is shear force? The two forces are perpendicular to the load-bearing surface, and the two forces are in opposite directions.
There are a pair of "split sleeves" on the super bolt cylinder. In addition to the tapered stud and expander, during the tightening process of the bolt, the split sleeve will expand and fill the inner hole, fundamentally eliminating the shear force.
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