Auxiliary Fixture for TPMS Sensor Assembly
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Solution Overview
Problem
Conventional auxiliary fixtures for tire pressure monitoring systems (TPMS) face issues with accurate assembly, alignment, and quick disassembly, particularly due to fixed structures that do not accommodate sensors of different sizes, leading to inefficiencies and increased costs.
Innovation Solution
An auxiliary fixture with a handle, positioning base, and holding lever, featuring adjustable elements and a quick release structure, allowing for secure mounting and easy adjustment of sensors of varying sizes, and facilitating quick assembly and disassembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a conventional auxiliary fixture with a fixed structure is used to assemble the TPMS sensor, then the assembly process is simple, but the fixture cannot accommodate sensors of different sizes, leading to reduced adaptability and increased costs
Solution Approach 1:
The fixture incorporates an adjustable positioning base with movable positioning blocks that can be repositioned along guide slots to accommodate different sensor diameters. This dynamic adjustment capability allows the same fixture to adapt to various sensor sizes without requiring multiple specialized fixtures, thereby improving versatility while maintaining reasonable structural complexity
Solution Approach 2:
The positioning base is divided into modular components including positioning blocks, guide slots, and adjustment mechanisms that can be independently adjusted. This segmentation allows flexible reconfiguration of the positioning elements to match different sensor dimensions, enabling the fixture to handle multiple sensor types with a single device
2Manufacturing precision
If the valve stem is pulled to securely deposit the sensor in the tire rim, then the assembly is secure, but the alignment between the valve stem and valve hole cannot be ensured when the operator applies force from different directions
Solution Approach 1:
The fixture introduces a connecting sleeve as an intermediary component between the valve stem and the operator's force application. The connecting sleeve, combined with the positioning base, acts as a mediator that converts multi-directional operator force into unidirectional axial force on the valve stem, ensuring proper alignment during insertion while maintaining ease of operation
Solution Approach 2:
The fixture replaces direct manual pulling of the valve stem with a mechanical system consisting of the connecting sleeve and positioning base. This mechanical substitution provides guided force transmission that automatically maintains alignment between the valve stem and valve hole center, reducing dependence on operator skill and force direction
3Ease of repair
If the valve stem is reassembled after incorrect deposition, then the sensor can be repositioned, but the rubber sheath on the valve stem is damaged or broken by the tire rim periphery, making the valve stem unusable again
Solution Approach 1:
The fixture performs preliminary correct positioning of the valve stem through the positioning base and connecting sleeve before the actual insertion into the tire rim. This preliminary action ensures proper alignment and reduces the need for reassembly, thereby preventing damage to the rubber sheath. The positioning mechanism guides the valve stem accurately on the first attempt, eliminating repeated insertion attempts that would damage the sheath
Data Source
AI summary
An auxiliary fixture for a tire pressure monitoring device has a handle, a positioning base, and a holding lever. The positioning base is connected to the handle and has a pivot segment and a clamping segment. The pivot segment is deposited on a rear side of the positioning base and is pivotally connected to the handle. The clamping segment is deposited on a front side of the positioning base, is connected to the pivot segment, and has two adjusting elements and a pushing pin. The adjusting elements are deposited on a front side of the clamping segment, and the pushing pin is deposited between the adjusting elements to press against the tire pressure monitoring device. A distance between the adjusting elements can be adjusted to enable the adjusting elements to clamp the tire pressure monitoring device. The holding lever is connected to the handle.