Offset Shear Plate Reinforcement for D-Pillar Twist Resistance
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Solution Overview
Problem
Hydraulic lift gates applied to pick-up truck D-pillars cause twisting or 'match-boxing' due to rearward force, and the transition from steel to aluminum truck bodies requires new attachment methods that differ from traditional welding, necessitating a more secure and adaptable reinforcement system.
Innovation Solution
An offset shear plate is integrated within the D-pillar, featuring parallel flanges attached to the front, outer, and rear walls, with rivets or threaded fasteners connecting these flanges to the corresponding surfaces, and an offset portion fastened to the rear cross member, preventing twisting and enhancing structural integrity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If traditional welding is used to attach reinforcement to steel truck boxes, then strong structural connection is achieved, but the method is not compatible with aluminum truck bodies that require riveting or flow-drill screw attachment
Solution Approach 1:
The patent changes the attachment method parameter from welding to mechanical fastening (rivets or flow-drill screws) to accommodate aluminum truck bodies. The offset shear plate design incorporates multiple flanges with different attachment configurations, allowing adaptation to various fastening methods while maintaining structural integrity in aluminum constructions.
2Adaptability or versatility
If accessories like hydraulic lift gates are mounted on the D-pillar, then specialized capabilities are added, but rearward force causes twisting or match-boxing of the D-pillar
Solution Approach 1:
The patent segments the D-pillar structure by inserting an offset shear plate with multiple flanges at different locations. The front flange attaches to the front wall, the outer flange attaches to the outer wall, and the offset flange attaches to the rear cross member. This segmentation creates multiple attachment points that distribute accessory loads, preventing twisting and match-boxing while maintaining accessory mounting capability.
3Weight of moving object
If aluminum truck bodies are used to reduce weight and improve fuel economy, then payload capacity increases, but new attachment methods requiring additional clearance are needed
Solution Approach 1:
The offset shear plate design serves multiple functions: it provides structural reinforcement, creates attachment surfaces for various fastening methods (rivets or flow-drill screws), and accommodates the clearance requirements of aluminum body assembly. The universal design with multiple flanges can adapt to different fastening technologies while maintaining structural integrity.
Data Source
AI summary
A reinforcement plate is assembled inside a D-pillar of a pick-up truck to prevent twisting or matchbox deflection of the D-pillar when an accessory, such as a hydraulic lift gate, is assembled inside the tailgate opening of the pick-up truck. The plate includes a horizontal planar portion that is attached by a front flange to a front wall of the D-pillar. An outer flange connects the plate to an outer wall of the D-pillar. An offset flange is secured to a rear cross member by fasteners inside the D-pillar.