Door Hinge Lockout Bracket for Pickup Truck Wide Body Retrofit
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Solution Overview
Problem
Vehicle rear doors with a 170-degree range of travel can damage wide body retrofits due to lack of original equipment limiting door travel in pickup truck applications, especially when retrofitted after assembly.
Innovation Solution
A hinge assembly with lockout brackets that restrict door travel to 90 degrees, preventing contact with wide bodies by securing the door-side hinge straps to the body-side straps, eliminating the need for additional hinges and simplifying installation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the door is allowed to swing through a 170-degree range to improve access to the cab, then ease of operation is improved, but the door may contact the wide body and cause damage
Solution Approach 1:
The lockout bracket is pre-installed on the door-side hinge strap at a specific location that corresponds to the desired door opening angle. This preliminary positioning ensures that when the door is opened, the bracket automatically engages with the body-side hinge strap to prevent further rotation before any damage can occur, thus protecting against harmful contact while maintaining ease of operation within the safe angular range.
2Reliability
If original equipment is installed at the assembly plant to limit door travel, then reliability is improved, but adaptability to retrofitted wide bodies is reduced
Solution Approach 1:
The door hinge system is segmented into modular components: the original hinge assembly and the separate, removable lockout bracket. This segmentation allows the lockout bracket to be independently installed or removed based on whether a wide body retrofit is present. The bracket can be easily attached to the door-side hinge strap without modifying the original hinge assembly, providing adaptability to different body configurations while maintaining reliable door travel limitation when needed.
3Reliability
If a complex additional hinge assembly is added to limit door travel, then reliability is improved, but device complexity increases
Solution Approach 1:
The door travel limitation function is extracted from the main hinge assembly and implemented as a separate, simple lockout bracket. This extracted component consists of a minimal structure that attaches to the existing door-side hinge strap and engages with the body-side hinge strap. By separating the limitation function into a standalone bracket rather than integrating it into a complex additional hinge assembly, the overall device complexity is minimized while maintaining reliable door travel control.
4Reliability
If multiple components are added to the hinge assembly to prevent door damage, then reliability is improved, but ease of manufacture deteriorates
Solution Approach 1:
The lockout bracket is designed as a simple, inexpensive component that can be easily manufactured using standard fabrication processes. Rather than creating a complex, expensive additional hinge assembly, the bracket uses basic structural elements that are simple to produce and install. This approach improves ease of manufacture while still providing reliable door contact prevention through the straightforward bracket mechanism.
Data Source
AI summary
A hinge assembly for opening and closing a door that provides access to the interior of a motor vehicle body is disclosed. The hinge assembly includes a body-side hinge strap secured to the body and providing a first axis, a door-side hinge strap secured to the door and providing a second axis spaced laterally from the first axis, a hinge mid-strap supported on the body-side hinge strap to pivot about the first axis and being pivotably supported on the door-side hinge strap at the second axis, and a lockout bracket secured to the door-side hinge strap and secured to the hinge mid-strap at a location between the first axis and second axis for preventing the door from pivoting about the second axis.