Category: Recreation∨g=

Bike Exerciser

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The Bike Exerciser is designed to provide a piece of fitness equipment that is both enjoyable and motivating for a child with learning disabilities who is overweight and does not exercise often. The operating mechanisms of the Bike Exerciser are two four-bar linkages with a crank rocker; one on the left side and one on the right. The four-bar linkage consists of three moving links, one fixed link, and four pin joints. The handles, peddles, and cranks are moving links, while the body frame is fixed. When a force is exerted on the pedal link, it causes the cranks to revolve and the handles to rock within a certain distance simultaneously. The motions of the four-bar linkage on the left and right sides are opposed since both sides are connected through a shaft attaching the oppositely aligned cranks. When the user starts to peddle with his feet, with his hands on the handles, his arms start to move. The motion on one side of the linkage triggers the other side to move at the same time. The bicycle seat is designed to slide on a seat rail, which is tilted and allows for horizontal and vertical adjustments. The body frame and linkages of the Bike Exerciser are constructed of steal tubing, except for two footrest plates in which aluminum thread plate is used instead. The maximum weight the Bike Exerciser can support is 200 pounds. The total cost of this prototype is approximately $685.


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