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Lock'n Post

The objective of this project was to conceptualize, invent and benchmark a new product.  This product would be designed and presented upon to fellow classmates. The proposed product was the Lock’n Post, a device in which utilizes the seat post of a bicycle as a locking mechanism to inhibit the theft of both the bicycle and bicycle seat.  Shown below are the CAD models as designed for the Lock’n Post.  The U-shaped bar can be placed in two positions, a riding position seen in Figure 1, and a locking position in Figure 2.



Materials were chosen accordingly and stress analysis was performed.  All components were selected to be high carbon steel or 6061 aluminum.  While designing the Lock’n Post system, several different finite element analyses (FEA) were performed.  Below is one example of FEA performed in COSMOSworks.  The software calculates that the von Mises stress will be about 11,000 psi on one of the non-load bearing components which stows the U-shaped bar onto the seat post while riding.  This translates to approximately 100 lbs of force able to be placed on this component.

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