Convertible Handle Mechanism for Utility Trailer Towing
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Solution Overview
Problem
Existing utility trailers lack a convertible handle that can easily switch between manual pulling and vehicle towing, and often require complex and costly mechanisms for dual dump pivot points and locking mechanisms, which are not efficiently accessible for user operation.
Innovation Solution
A convertible handle with a grip portion that slides along a shaft, allowing for manual pulling and vehicle coupling, combined with a tub release mechanism mounted on the tub for easier access and dual pivot points, reducing complexity and manufacturing costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a rigid handle with spring-loaded twist-locking arrangement is used for manual pulling, then one or two persons can lift and maneuver the trailer, but the tongue member requires a large cross-section to accommodate the apparatus
Solution Approach 1:
The handle is divided into separate components: a grip portion that can be attached to or removed from the tongue member. This segmentation allows the locking mechanism to be distributed rather than concentrated in one large cross-section, enabling manual pulling without requiring a bulky tongue structure.
Solution Approach 2:
The handle incorporates movable elements including a slideable grip portion and rotatable shaft that can lock in multiple positions. This dynamic design provides manual pulling functionality through controlled movement and locking mechanisms without requiring a large static cross-section, as the locking features engage through linear and rotational motion rather than bulk.
2Device complexity
If a simple pin connection is used for lighter towed vehicles, then the connection is simpler, but the apparatus is not conducive to gripping with the human hand for manual pulling
Solution Approach 1:
The handle assembly serves multiple functions: it provides a gripping surface for manual pulling, acts as a connection point for the tongue member, and includes locking mechanisms to secure the connection. This multi-functional design maintains relative simplicity while adding the necessary manual pulling capability that a simple pin connection lacks.
Solution Approach 2:
The handle acts as an intermediary component between the user's hand and the tongue member. It translates the user's gripping and pulling force into effective maneuvering of the trailer, while also serving as the mechanical connection point to the tongue, thereby bridging the gap between simple connection and manual operability.
3Adaptability or versatility
If a convertible handle with slideable grip portion is used, then seamless conversion between manual and vehicle towing is enabled, but the mechanism requires additional components for locking and sliding
Solution Approach 1:
The locking mechanism and the slideable grip functionality are merged into a unified handle assembly. The grip portion integrates both the sliding motion for conversion and the locking features for securing in different positions, eliminating the need for separate locking devices and reducing the overall component count despite the enhanced functionality.
Solution Approach 2:
The handle assembly is designed as a universal component that performs multiple functions: it enables manual pulling when the grip is in the unlocked position, provides vehicle towing connection when locked, and includes integrated locking and sliding mechanisms. This multi-functionality reduces the need for separate components for each function, thereby limiting the increase in device complexity.
Data Source
AI summary
A utility trailer is disclosed. The trailer is a two-wheel trailer with rotating handle and yoke tube that locks to the chassis of the trailer in two positions. The trailer also includes two dump pivot points and a release lever mounted to the tub of the trailer with handle bracket.