Low-Profile Crossbar Clamp Assembly With Side-Access Adjustment
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Solution Overview
Problem
Rooftop crossbar clamps face challenges in accommodating varying crossbar sizes and shapes, require adjustable positioning, and need to be accessible for easy installation and adjustment, while minimizing height and aerodynamic impact.
Innovation Solution
A crossbar clamp assembly with a rail and jaws that are slidable along the rail, featuring vertical and horizontal fastener assemblies to secure the jaws and clamp the crossbar, allowing for adjustable positioning and easy access.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the clamp height is increased to improve accessibility for installation and adjustment, then ease of operation is improved, but aerodynamic drag increases and fuel efficiency decreases
Solution Approach 1:
The fastener mechanism is designed to be accessible from the lateral side of the clamp assembly rather than requiring access from below. This dimensional shift allows installers to access and operate the fastener while standing beside the vehicle, eliminating the need to crawl underneath while maintaining a low-profile clamp height that preserves aerodynamics.
2Adaptability or versatility
If the clamp design is made adjustable to accommodate various crossbar sizes and shapes, then adaptability is improved, but device complexity increases
Solution Approach 1:
The clamp jaw is designed with sliding movement capability along the rail, allowing dynamic adjustment of the clamp position to accommodate different crossbar locations. The fastener mechanism enables the jaw to be positioned at various points along the rail and locked in place, providing adaptability for different crossbar configurations without requiring complex multi-component adjustment systems.
3Object-affected harmful factors
If the clamp profile is reduced to minimize aerodynamic impact, then aerodynamic efficiency is improved, but accessibility for installation and adjustment deteriorates
Solution Approach 1:
The fastener access point is repositioned from the vertical bottom side to the lateral horizontal side of the clamp assembly. This allows the clamp to maintain a low vertical profile for aerodynamic efficiency while providing easy lateral access to the fastener mechanism for installation and adjustment operations.
Data Source
AI summary
A crossbar clamp assembly including first and second jaws, each suspended from and slidable along a rail, a horizontal fastener assembly, and a vertical fastener assembly. The vertical fastener assembly includes a bolt extending through the first jaw with a head portion in a longitudinal slot of the rail. The horizontal fastener assembly extends through a lower portion of each of the first and second jaws, and the assembly is configured to receive a crossbar above the horizontal fastener assembly. Tightening of the vertical fastener assembly secures the first jaw relative to the rail, and tightening of the horizontal fastener assembly draws the first and second jaws together to clamp a received crossbar between the jaws.