“Locknut”的意思、由来-开放百科全书

词条

Locknut

释义

Types
Prevailing torque values
See also
References
Notes Bibliography
External links

A locknut, also known as a lock nut, locking nut, prevailing torque nut,^[1] stiff nut^[1] or elastic stop nut,{{sfn|Smith|1990|p=104}} is a nut that resists loosening under vibrations and torque. Elastic stop nuts and prevailing torque nuts are of the particular type where some portion of the nut deforms elastically to provide a locking action.{{sfn|Smith|1990|p=104}} The first type used fiber instead of nylon and was invented in 1931.^[2]

Locknuts, jam nuts, lock washers, and thread-locking fluid are ways to prevent vibration from loosening a bolted joint.

Types

There are various kinds of specialised lock nuts, including:

Castellated nut
Distorted thread locknut
- Centerlock nut
- Elliptical offset locknut
- Toplock nut
- Philidas nut
Interfering thread nut
- Tapered thread nut
Jam nut
Jet nut (K-nut)^[3]
Keps nut (K-nut or washer nut) with a free-spinning washer. In the locknut form, this is a star-type lock washer.
Plate nut
Polymer insert nut (Nyloc nut)
Security locknut All steel reusable nut for high vibration and harsh environments.
Serrated face nut
Serrated flange nut
Speed nut (sheet metal nut or Tinnerman nut)
Split beam nut (BINX nut^[4])
Palnut

Prevailing torque values

Prevailing torque^[5] differentiates a locknut from a free spinning nut based on a value of how much torque is required during installation before clamp loading. For example, on a nylon-insert nut, it is the torque needed to overcome the resistance of the nylon dragging across the mating thread. This torque value is usually not very high relative to final installation torque. Tolerance ranges for torque are specified in some standards such as (ISO, DIN, IFI, ASME, SAE, AN-, MS-, NAS- NASM-).

References

Notes

1. ^¹{{Citation | title = Glossary of Terminology Related to Nuts and Bolts | url = http://www.boltscience.com/pages/glossary.htm | accessdate = 2008-11-30}}.
2. ^[https://books.google.com/books?id=8ycDAAAAMBAJ&pg=PA67&dq=Popular+Science+1931+plane&hl=en&ei=AQUHTY_IEtOhnQeK35jlDQ&sa=X&oi=book_result&ct=result&resnum=8&ved=0CEQQ6AEwBw#v=onepage&q=Popular%20Science%201931%20plane&f=true "Nut With Elastic Ring Can't Work Loose", April 1931, Popular Science] bottom of page 67 drawing of how lock nuts work
3. ^{{Citation | title = K-NUTS.com | url = http://k-nuts.com | accessdate = 2012-03-01}}.
4. ^{{Citation | title = fastenerdata.co.uk | url = https://www.fastenerdata.co.uk/fasteners/nuts/prevailing-torque/binx.html | accessdate = 2019-03-08}}.
5. ^{{cite web|last1=Kaindl|first1=Mike|title=The Locknut Whisperer|url=http://locknutwhisperer.blogspot.com/2014/05/prevailing-torque-locknuts-what-to-ask.html|publisher=blogspot|accessdate=3 June 2014}}

Bibliography

{{Citation | last = Smith | first = Carroll | author-link = Carroll Smith | title = Carroll Smith's Nuts, Bolts, Fasteners, and Plumbing Handbook | publisher = MotorBooks/MBI Publishing Company | year = 1990 | url = https://books.google.com/books?id=A81HmmRCN7YC | isbn = 0-87938-406-9}}.

External links

[https://books.google.com/books?id=2yADAAAAMBAJ&pg=PA151&dq=popular+science+February+1946&hl=en&ei=vOPkTL3jJsnOnAf8toClDQ&sa=X&oi=book_result&ct=result&resnum=5&ved=0CDMQ6AEwBA#v=onepage&q=popular%20science%20February%201946&f=true "Hold Everything", February 1946, Popular Science] page on lock nuts and washer technology developed during World War Two

1 : Nuts (hardware)

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