Off-Road Accessory Latch Mechanism With Tool-Free High-Clamp Mounting
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Solution Overview
Problem
Existing hand-operated latch mechanisms for attaching accessories to off-road vehicles require tools and have drawbacks such as difficulty in securing objects of varying sizes and shapes, and inadequate clamping forces, leading to insecure attachments.
Innovation Solution
A latching mechanism with a T-bolt head and handle system that allows tool-free attachment, featuring a spring system for axial bias, a conical surface for drainage and reduced wear, and a compact design with a hooking portion for secure mounting, enabling easy attachment and detachment of accessories without tools.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If existing hand-operated latch mechanisms are used, then tool-free attachment is achieved, but clamping force is inadequate and attachment is insecure
Solution Approach 1:
The latch mechanism incorporates a cam surface that converts rotational motion into axial movement, dynamically increasing clamping force as the handle is rotated. The cam surface geometry allows the latch to self-tighten, transforming the user's rotational input into progressive linear clamping action that secures the accessory firmly to the vehicle frame.
Solution Approach 2:
The latch mechanism is divided into distinct functional components: a handle for operation, a cam surface for force multiplication, a latch body for structural support, and a mounting interface for attachment. This segmentation allows each component to be optimized for its specific function while working together to achieve both ease of operation and strong clamping force.
2Adaptability or versatility
If conventional mounting methods using ropes or cords are used, then accessories can be attached, but securing objects of varying sizes and shapes is difficult
Solution Approach 1:
The latch mechanism features a universal mounting interface with a mounting recess that can accommodate accessories of various sizes and shapes. The cam-based clamping action provides consistent securing force regardless of the accessory geometry, making the system versatile for different applications while maintaining reliable attachment.
3Reliability
If traditional latch designs are used, then mounting is achieved, but water ingress and contact surface wear are problematic
Solution Approach 1:
The cam surface is designed with a conical curvature that serves multiple functions: it provides the mechanical advantage for increasing clamping force, and its sloped geometry naturally sheds water and prevents water ingress into the mounting interface. The curved surface also distributes contact pressure more evenly, reducing wear on contact surfaces.
4Reliability
If existing latch mechanisms are used, then attachment is achieved, but the design is not compact and profile is large
Solution Approach 1:
The latch mechanism is designed with a compact nested structure where the handle, cam surface, and latch body are integrated in a space-efficient arrangement. The cam surface is positioned within the latch body volume, and the handle rotates within a compact arc, minimizing the overall profile while maintaining secure attachment capability.
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 latching mechanism provides a strong, tool-free attachment solution with increased clamping force, reduced water ingress, and improved durability, allowing for secure mounting of accessories on off-road vehicles, exceeding the static pull strength of prior art latch mechanisms.
Implementation Method 1
The latching mechanism includes a spring system for biasing the head axially, such that the head can be moved either upwardly or downwardly from a balanced elevation against either a downward biasing force or an upward biasing force of the spring system
Implementation Method 2
the handle rides on a conical upper surface of the body, sloped downwardly and outwardly from the rotation axis so as to reduce entry of muddy water and reduce contact surface wear between the handle and the body
Data Source
AI summary
A latching mechanism removably attaches an accessory to an offroad vehicle without requiring tools. The latching mechanism includes a body, a shaft extending through the body, and a handle riding on a conical surface of the body for rotating the shaft relative to the body. An oblong head extends on a lower side of the body, rotatable by the handle and shaft to a position where the head extends under a shoulder of a mounting recess. A spring system biases the head axially, such that the head can be moved either upwardly or downwardly from a balanced elevation set by a nut tightenable on a bolt. The mounting recess has an upper portion shaped differently from a lower portion. The body includes a hooking portion which extends significantly above the top of the mounting recess.