Development of a Four-Drive Bionic Fitness Bike

As the quality of life is rising constantly, the fitness industry has developed quickly, and the innovation and development of fitness equipment has been in high demand. In this paper, a new type of fitness bike is introduced. It is the so-called FDBFB (four-drive bionic fitness bike) which can be driven by either hands or legs, or any combination of any hand and leg as the user likes. By changing the riding mode, the user can do many different exercises such as stair-climbing, jaguar-like running, horse-like walking, and so on, as well as cycling. The new motion modes and unique transmission mechanism are mainly analyzed, which is followed by the design of a four-drive transmission system. After the ergonomical design of the structure, a compound resistance system based on the electromagnetic principles is analyzed and its principle for control and exercise motion determination is introduced. Finally, an FDBFB prototype is developed and tested.