Anchor Pin Bushing Driver for Hub-In-Place Replacement
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Solution Overview
Problem
The process of replacing an anchor pin bushing in large truck and trailer braking systems requires the removal of the wheel hub assembly, which is time-consuming and burdensome, limiting direct access to the bushing.
Innovation Solution
A specialized bushing driver tool with a unique shape and configuration, allowing it to be driven by hand or with a pneumatic tool, that fits around the wheel hub assembly and enables the replacement of the bushing without removing the wheel hub, featuring a cylindrical shaft with varying diameters and a cutout section for maneuverability and a removable installation sleeve to prevent over-insertion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the wheel hub assembly is removed to replace the anchor pin bushing, then direct access to the bushing is achieved, but the replacement process becomes time-consuming and burdensome
Solution Approach 1:
A specialized driver tool is introduced as an intermediary device that fits around the wheel hub assembly, enabling access to the anchor pin bushing without removing the wheel hub. The driver tool has a unique shape that accommodates the wheel hub while providing direct contact with the bushing for replacement operations.
2Force
If a traditional straight driver tool is used, then force can be applied to the bushing, but the tool cannot be maneuvered around the wheel hub assembly
Solution Approach 1:
The driver tool is segmented into distinct functional zones: a broad flat striking end for force application, a shaft portion with varying diameters for structural integrity and maneuverability, and a first raised segment with diameter larger than the bushing inner diameter for precise positioning and engagement.
Solution Approach 2:
The driver tool transitions from a simple linear shape to a three-dimensional form with varying cross-sections, including the shaft with different diameters and the first raised segment, allowing it to navigate around the wheel hub assembly while maintaining structural strength and precise engagement capability.
3Strength
If the driver shaft is made thick for structural integrity, then the tool can withstand hammer forces, but it cannot be maneuvered around the wheel hub assembly
Solution Approach 1:
The driver shaft exhibits local quality variations with different diameters at different locations: the shaft portion has a first diameter optimized for flexibility and maneuverability, while the second diameter portion provides increased strength for withstanding hammer forces, and the first raised segment has a third diameter for precise engagement with the bushing.
Data Source
AI summary
A specialized tool for replacing an anchor pin bushing on a large truck or trailer is provided. The tool is a solid, cylindrical shaft designed to be driven into the anchor pin bushing by an operator using a manual hammer. The tool features a cutout segment that allows it to be maneuvered around the wheel hub assembly while driving the bushing, thus eliminating the need for a burdensome removal of the wheel hub assembly. The tool can be used to remove an old bushing and to install a new bushing into an eye of a brake frame housing. The tool may also include a removable installation sleeve, which is used to prevent a new bushing from being driven in too far. An alternate embodiment describes the specialized tool in a format designed to be driven by standard pneumatic air tools.