Tailgate Lock Adapter for Friction-Free Hinge Rotation
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Solution Overview
Problem
Existing clamping-type security locks for removable truck tailgates lack a secure and friction-reducing mechanism that allows for free rotation while maintaining effective clamping, leading to potential binding and damage to vehicle surfaces.
Innovation Solution
A tailgate lock system featuring an adapter with a tapered inner surface that corresponds to the taper of the fixed cup portion, allowing the security lock to rotate freely around the hinge axis while applying an inward radial clamping force through an adjustable clamp band, preventing unauthorized removal and reducing friction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a clamping-type security lock is installed on a tailgate hinge assembly without an adapter, then the lock can apply clamping force to secure the tailgate, but the lock will bind and damage vehicle surfaces during rotation
Solution Approach 1:
An adapter assembly is introduced as an intermediary component between the security lock and the tailgate hinge assembly. The adapter includes a tapered inner surface that corresponds to the taper of the fixed cup portion, allowing the lock to rotate freely while maintaining clamping force. This intermediary element prevents direct contact between the lock and the tapered hinge surface, eliminating binding and surface damage.
2Reliability
If a security lock directly clamps the fixed cup portion of the hinge assembly, then the lock provides security, but the lock cannot rotate freely due to the tapered surface
Solution Approach 1:
The adapter assembly serves as a mediator that enables free rotation while maintaining security. The tapered inner surface of the adapter matches the taper of the fixed cup portion, creating a interface that allows rotational movement without compromising the clamping effectiveness of the security lock.
3Device complexity
If the adapter inner surface is flat, then the adapter structure is simpler, but the adapter cannot properly engage the tapered fixed cup portion
Solution Approach 1:
The adapter inner surface is designed with local quality variation - specifically, a tapered surface that corresponds to the taper of the fixed cup portion. This localized tapering ensures proper engagement and rotation capability, while the rest of the adapter structure remains relatively simple. The tapered portion is precisely where it is needed to match the hinge assembly geometry.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The system securely clamps the tailgate in place, allowing for free rotation without binding or damaging the vehicle surfaces, enhancing security and reducing wear, while preventing unauthorized removal by using a key-lock mechanism.
Implementation Method 1
The fixed cup portion of the hinge assembly may comprise an outer surface (56) having a taper (38) relative to the hinge axis and the second portion (28) of the inside surface of the adapter may comprise a taper (39) relative to the hinge axis corresponding to the taper of the outer surface of the fixed cup portion.
Implementation Method 2
The adjustable clamp band may be configured and arranged to apply an inwardly-directed radial clamping force relative to said hinge axis.
Data Source
AI summary
A tailgate lock system comprising a security lock for a tailgate hinge assembly, wherein the tailgate hinge assembly comprises a fixed cup portion and a rotating portion arranged to rotate about a hinge axis relative to the fixed cup portion, an adapter configured to extend between the security lock and the tailgate hinge assembly, the adapter having an inside surface having a first portion configured to engage the rotating portion of the hinge assembly and a second portion configured to radially overlap the fixed cup portion of the hinge assembly, whereby selective rotation about the hinge axis causes rotation of the adapter and the security lock about the hinge axis.