Snowmobile Spindle Geometry for Reduced Deep-Snow Drag
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Solution Overview
Problem
Snowmobile spindles face challenges in reducing drag and handling in deep snow conditions, with existing designs often digging into the snow, leading to increased resistance and decreased maneuverability.
Innovation Solution
A spindle design featuring a body with a triangular cross-sectional shape, a leading edge with complex geometry, and a flat outboard side, which deflects snow and reduces drag by glancing off it, improving handling and stability during side-hilling and deep snow operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a conventional spindle design is used, then the structure is simple and easy to manufacture, but the spindle digs into the snow causing increased drag and decreased maneuverability
Solution Approach 1:
The spindle body incorporates curved surfaces and rounded edges instead of sharp angles, allowing the spindle to glide over snow rather than dig in. The curved leading edge and contoured body surfaces deflect snow flow smoothly, reducing resistance and drag forces during operation in deep snow conditions.
Solution Approach 2:
The invention modifies the geometric parameters of the spindle, including the angles of the leading edge, the curvature radius of rounded corners, and the overall body contours. These parameter changes optimize the spindle's interaction with snow, transforming it from a digging geometry to a gliding geometry that reduces drag while maintaining structural integrity.
2Device complexity
If a conventional spindle design is used, then the structure is simple, but the handling and stability in deep snow conditions deteriorate
Solution Approach 1:
The curved and contoured spindle body design reduces snow accumulation and improves airflow over the spindle, enhancing stability and handling characteristics in deep snow without requiring complex active control systems or multiple components.
Solution Approach 2:
The spindle features asymmetric geometry with different contour profiles on various surfaces, optimized for directional snow deflection. The asymmetric design creates favorable pressure distributions and snow flow patterns that improve handling and directional stability during operation.
3Object-affected harmful factors
If a spindle with complex leading edge geometry is used, then drag is reduced and handling improves, but the manufacturing complexity increases
Solution Approach 1:
The leading edge employs smooth curved surfaces with specific radius of curvature values that optimize snow deflection and drag reduction. These curved geometries can be manufactured using standard forming processes, balancing aerodynamic performance with manufacturing feasibility.
Solution Approach 2:
The leading edge geometry is defined by specific parameter values including angle ranges and curvature radii that achieve optimal drag reduction. These parameters are selected to balance performance benefits with manufacturability, allowing production through conventional processes without requiring excessive complexity.
Data Source
AI summary
Embodiments of the present disclosure describe a recreational vehicle spindle for use with a snowmobile, a snow bike, all-terrain vehicle (ATV), or a side by side vehicle (S×S or UTV). The spindle includes a body with one or more mounts for securing a suspension component and a ground engaging member thereto. The body of the spindle may include one or more of a window, a recess, a leading edge, a triangular cross-sectional shape, an integrated steering stop, and an outboard side that includes a flat surface.