Portable Trailer Axle Jig for Precise On-Site Spindle Alignment

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Solution Overview

Problem

There is a lack of easily transported axle support assemblies that allow for the alignment of trailer axle components into a desired configuration during assembly, leading to potential sizing errors and increased costs due to reassembly if the axle is incorrectly sized.

Innovation Solution

A trailer axle manufacturing jig comprising a pair of jig horizontal members, end cross members, support leg members, attachment wheel assemblies, and balancing weights, which allows for on-site assembly and alignment of axle components, ensuring proper welding and alignment with the trailer body.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Manufacturing precision

If axles are assembled at a manufacturing location using large and complex assemblies, then alignment precision is improved, but device complexity and transportability worsen

Engineering Contradiction:
Improvealignment precisionVSAvoiddevice complexity
Core Design Contradiction:
Manufacturing precisionVSDevice complexity

Solution Approach 1:

The manufacturing jig is divided into modular components including horizontal members, vertical members, and adjustable support structures that can be easily assembled and disassembled. This segmentation maintains alignment precision while reducing overall device complexity and improving transportability to job sites.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The jig incorporates adjustable and movable components such as height-adjustable support legs and reconfigurable positioning mechanisms. These dynamic elements allow the device to adapt to different axle configurations while maintaining precise alignment, reducing the need for complex fixed structures.

Inventive Principle:
Principle #15Dynamics

2Manufacturing precision

If axles are assembled at a manufacturing location, then alignment precision is improved, but transport time and reassembly costs increase

Engineering Contradiction:
Improvealignment precisionVSAvoidtransport time
Core Design Contradiction:
Manufacturing precisionVSLoss of time

Solution Approach 1:

The jig is designed to be pre-assembled in a compact configuration for easy transport to the job site, then quickly deployed and configured for specific axle assembly tasks. This preliminary preparation eliminates the need for complex on-site setup while maintaining manufacturing-level alignment precision.

Inventive Principle:
Principle #10Preliminary action

Solution Approach 2:

The manufacturing jig is designed as a universal system that can accommodate various axle sizes and configurations through adjustable components. This multi-functionality allows a single portable unit to replace multiple specialized fixtures, reducing transport requirements and time losses.

Inventive Principle:
Principle #6Universality (Multi-functionality)

3Ease of manufacture

If axle length is measured inaccurately, then manufacturing cost increases, but measurement precision requirements worsen

Engineering Contradiction:
Improveease of manufactureVSAvoidmeasurement precision
Core Design Contradiction:
Ease of manufactureVSMeasurement precision

Solution Approach 1:

The jig incorporates mechanical measurement and positioning systems that automatically determine the correct axle length based on the specific trailer application. This mechanical measurement system replaces manual measurement processes, eliminating human error while maintaining ease of use for operators.

Inventive Principle:
Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The jig includes built-in measurement and verification features that automatically check axle dimensions and provide feedback to the operator. This self-verification capability ensures accurate measurements without requiring highly skilled operators or complex measurement procedures.

Inventive Principle:
Principle #25Self-service

Data Source

PatentUS12350761B2On-site trailer axle manufacturing jig
Publication Date: 2025.07.08 HARGIS JEFFREY HAL
  • US12350761B2 patent drawing
  • US12350761B2 patent drawing
  • US12350761B2 patent drawing

AI summary

A system providing an on-site trailer axle manufacturing jig according to the present invention includes a pair of jig horizontal members, a pair of end cross members coupled between the pair of jig horizontal members about opposing ends, a set of support leg members vertically arranged to support the combination of the jig horizontal members and the end cross members, a pair of attachment wheel assemblies adjustable coupled between the jig horizontal members, and an extending shaft coupled to one of the attachment wheel assemblies for receiving a set of balancing weights to act as a counterweight when manufacturing a trailer axle. Each of the support leg members is coupled to a corresponding leveling adjustment leg, and each attachment wheel assembly has an attachment wheel, a spindle chuck, and a wheel mount spindle. A trailer axle is assembled with a spindle inserted into each spindle chuck to align with opposing ends of an axle member during welding.