Transfer Case Skid Shield Impact Protection
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Solution Overview
Problem
Transfer cases in motor vehicles are vulnerable to impact with the ground or obstructions, leading to torque loss and heavy damage to the powertrain, as existing protective shields often get damaged and need replacement upon contact with rocks or debris.
Innovation Solution
A skid shield is designed to attach to vehicle side rails, featuring a body with frame members and skid plates that extend around the transfer case, using attachment brackets with receiving holes to align with existing mounting hardware, providing a protective caged-enclosure that absorbs impact energy through an angled bow portion on the skid plate.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a protective shield is installed to protect the transfer case, then the transfer case is protected from impact damage, but the shield itself gets damaged when contact with rocks or debris occurs
Solution Approach 1:
The protective shield is divided into a modular frame structure with multiple members (front member, rear member, side members) that can be assembled together. This segmentation allows the structure to distribute impact forces across multiple elements rather than concentrating stress on a single continuous shield, improving overall durability while maintaining protection effectiveness.
Solution Approach 2:
The shield structure incorporates an angled bow portion on the front frame member that changes the geometric parameters of the impact interface. This angular configuration redirects impact forces away from the transfer case and distributes them across the frame structure, allowing the shield to withstand higher impact loads without damage while maintaining its protective function.
2Reliability
If a custom protective shield is designed, then protection is optimized for the transfer case, but the device complexity and manufacturing cost increase
Solution Approach 1:
The frame structure is designed to serve multiple functions: it provides protection for the transfer case, serves as a mounting structure for skid plates, and can be attached to existing vehicle frame members. The modular design with standardized connection points allows the same basic structure to protect different underbody components, reducing overall system complexity while maintaining optimized protection.
Solution Approach 2:
The protective shield frame is designed to nest around existing vehicle frame members and crossmembers, utilizing the vehicle's existing structural elements. This nesting approach allows the shield to integrate with the vehicle's current architecture rather than requiring a completely separate complex structure, simplifying both design and manufacturing while providing targeted protection.
3Strength
If mounting holes are added to side rails for the shield, then the shield can be securely attached, but the side rails require additional modifications
Solution Approach 1:
The shield mounting system is designed to utilize existing receiving holes in the side rails that are already present for other vehicle components. By performing preliminary planning to identify and use these pre-existing openings, the design avoids the need for additional modifications to the side rails, maintaining ease of manufacture while ensuring secure attachment through properly positioned mounting holes in the shield structure.
Data Source
AI summary
A skid shield for attachment to vehicle side rails for protecting an underbody vehicle component, where the vehicle has a cross member mounted to the side rails with mounting hardware and receiving holes, includes a body and a skid plate. The body extends from the first side rail to the second side rail and around the underbody of the vehicle component. The body has at least one frame member. The at least one skid plate is attached to the frame member. The skid shield also includes first and second attachment brackets that attach the frame member to the side rails. The attachment brackets have receiving holes for receiving a fastener. The receiving holes are configured for alignment with the receiving holes in the side rails. The fastener fastens both the attachment bracket of the skid shield and the mounting hardware of the cross member to the side rails.