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X-Lock: 3C-klassat snöskoterlås: Hållfasthetsberäkningar och dimensionering
Umeå University, Faculty of Science and Technology, Department of Applied Physics and Electronics.
2016 (Swedish)Independent thesis Basic level (professional degree), 10 credits / 15 HE creditsStudent thesisAlternative title
X-Lock: 3C-grade snowmobile lock : Strength calculation and dimensioning (English)
Abstract [en]

In this thesis I calculate the strength of a new concept for a snowmobile lock. The lock exists as a bike lock and we ask the question if we can use this design for a snowmobile. SSF (Stöldskyddsföreningen) is the association who creates the rules and regulations for how strong the lock has to be to be approved from the insurance companies. Snowmobile locks and motorcycle locks have the same rules and standards for being approved and they follow the TFFN 701 standard. In the booklet there are different levels of safety B, C and D. C is the lowest level of safety for use on snowmobiles and motorcycles.

The focus in this report is on specifying the dimensions so that the lock can withstand the tests. To make sure that the lock will withstand the tests I’ve done calculations, FEM simulations and CAD models.

The results show that my calculations are equal to the FEM simulations for the pulling test. The twist test was the most destructive to the lock arms and the major factor when it came to deciding the shape of the lock. In the original design the stress was reaching 1.01GPa. That stress level was too high so I decided to change the geometric shape so that the stress became 450MPa.

The results show that it is possible to manufacture the proposed lock if some changes are made to the design. The weight of the lock would be higher than its competitors but the mobility and design makes up for it.

Place, publisher, year, edition, pages
2016. , 30 p.
, MA, 1454
National Category
Mechanical Engineering
URN: urn:nbn:se:umu:diva-117175OAI: diva2:905657
External cooperation
Martina Eriksson
Subject / course
Educational program
Bachelor of Science Engineering in Mechanical Engineering
Available from: 2016-02-25 Created: 2016-02-23 Last updated: 2016-02-25Bibliographically approved

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Reuterstrand, Mathias
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