Diesel Injector Extraction Apparatus with Transverse Shank Adjustment
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Solution Overview
Problem
Existing extractor tools for diesel engine injectors require repositioning for each extraction, leading to increased time and risk of damage due to limited maneuverability and operator-dependent positioning, especially when dealing with multiple injectors.
Innovation Solution
A multiple-positioning apparatus with a supporting structure and adjustable shank system allowing for simultaneous extraction of multiple injectors, featuring a female thread assembly with a transverse degree of freedom and guiding slot for optimal contact distribution, reducing the need for repositioning and enhancing safety.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If single extractor tools are used for each injector, then the extraction operation can be performed, but the tool must be repositioned for each injector which increases intervention time
Solution Approach 1:
The patent combines multiple extractor tools into a single integrated apparatus with multiple shanks that can simultaneously extract multiple injectors. The supporting structure integrates several extraction mechanisms that work together in one positioning operation, eliminating the need to reposition separate tools for each injector.
Solution Approach 2:
The apparatus is designed as a universal tool that can extract multiple injectors simultaneously through a single positioning operation. The multi-functional design allows one apparatus to perform the work of multiple single extractor tools, adapting to different injector positions without requiring separate specialized tools.
2Ease of operation
If extractor tool positioning is left to operator discretion, then flexibility is maintained, but the risk of damaging components increases with limited operator experience
Solution Approach 1:
The apparatus is designed to be self-positioning through its multiple shanks and supporting structure that naturally align with the engine casing and injector positions. The geometry of the apparatus and engine interact to automatically establish correct positioning, reducing dependence on operator skill and judgment.
Solution Approach 2:
The supporting structure is designed to distribute reaction forces across multiple contact points on the engine casing before extraction begins. This pre-distributed support system prevents localized stress concentrations that could damage components, regardless of operator positioning precision.
3Ease of operation
If limited maneuvering space prevents proper extractor positioning, then extraction can still be attempted, but the risk of damaging casing or injector increases
Solution Approach 1:
The apparatus transitions from a single-point contact extractor to a distributed multi-point contact system. By engaging multiple shanks at different positions simultaneously, the apparatus distributes extraction forces across a larger spatial dimension, reducing the impact of limited maneuvering space at any single location.
Solution Approach 2:
The apparatus incorporates movable and adjustable elements that allow dynamic adaptation to the available maneuvering space. The supporting structure and shanks can adjust their positions and orientations to optimize contact with the engine casing within the constrained space, maintaining extraction capability while minimizing damage risk.
4Productivity
If multiple extractor tools are used for simultaneous injector disassembly, then intervention time is reduced, but the device complexity and cost increase
Solution Approach 1:
The apparatus segments the extraction function into multiple independent shanks and female threads that operate simultaneously but are structurally integrated. Each shank-handle-thread assembly can be viewed as a functional segment that contributes to the overall simultaneous extraction capability while maintaining modular simplicity.
Data Source
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AI summary
An apparatus (1) for extracting injectors of diesel engines, comprising a supporting structure (2) that can be associated with a diesel engine, at least one female thread assembly (3) that is associated with the supporting structure (2), at least one externally threaded shank (4) mated with the female thread assembly (3), means (5) for temporary connection to at least one injector during extraction, which are associated with the shank (4), and means (17) for actuating the rotary and translational motion of the shank (4) with respect to the female thread assembly, the shank (4) being associated with the supporting structure (2) with at least one degree of freedom in translational motion along at least one axis (A) that lies transversely to the longitudinal extension of the shank (4), the shank being jointly connected for translational motion along the axis (A) to the female thread assembly (3) and being able to vary continuously the working position within a path that lies on the axis.