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Overview
Overview
The design package below is the first step towards a well tested and validated drivetrain for the Wildcat 3526. A belt driven, conical CVT (continuously variable transmission) is one drivetrain option being considered because of its ability to smoothly transition across a wide range of gear ratios. This capability stems from the geometry of two equally and oppositely tapered conical shafts connected by a belt.
Figure 1: Model of CVT gearbox to existing Dynamometer connection
Figure 2: Visual of conical CVT gearbox internals; drive shaft (top) and driven shaft (bottom)
 When the drive shaft diameter is larger than the driven shaft diameter, the driven shaft spins at a proportionally higher speed than the drive shaft. The opposite would be true when the drive shaft is smaller than the driven shaft. To test the aforementioned theory for this specific application, a gearbox was designed to mate the conical CVT to a dynamometer previously used to find power curves for the competition provided engines. When the belt is running at one end of the cone, the dynamometer should show twice the torque and half the speed that the engine typically outputs. On the other end, the dynamometer should show twice the speed and half the torque. This testing will also evaluate if a belt, rather than a gearset, will handle the load being put on these drivetrain components. With this design package completed the manufacturing process can begin, taking the Wildcat 3526 one step closer to a proven drivetrain.
Assembly Drawing
Assembly Drawing
CVT Drawings (combined).pdfPage updated
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