Post Puller Mast Arm Pusher Mechanism
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Solution Overview
Problem
Existing post pullers require large operating spaces, are complex, and costly due to numerous components, increasing the risk of failure and inefficiency in handling highway guardrail posts.
Innovation Solution
A post pulling system with a mast, an elongated arm rotatably and pivotably supported by the mast, and a pusher that increases in length to change the angle relative to the mast, allowing for efficient post extraction with a trailer-mounted mechanism, utilizing hydraulic or motor-powered components for enhanced operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If a post puller uses a base with two lateral hydraulic cylinders, then the post can be pulled effectively, but the operating space required increases significantly
Solution Approach 1:
The post puller is divided into modular components: a mast section, an elongated arm section, and a pusher section. These segments can be connected in series to achieve the necessary pulling force while maintaining a compact configuration when not in use, thus reducing the operating space requirement.
Solution Approach 2:
The elongated arm is positioned within or alongside the mast structure, and the pusher mechanism is integrated into the arm assembly. This nested arrangement allows the components to occupy minimal space when retracted while still providing sufficient leverage and force for post extraction.
2Force
If a post puller uses multiple components, then the pulling function is achieved, but the device complexity increases
Solution Approach 1:
The mast, elongated arm, and pusher are merged into a single integrated mechanism rather than separate systems. The mast serves as both the structural support and the mounting for the arm, while the pusher is directly attached to the arm assembly, reducing the total number of discrete components and simplifying the overall system.
Solution Approach 2:
The elongated arm serves multiple functions: it acts as a structural link between the mast and pusher, provides the lever arm for mechanical advantage, and serves as the mounting structure for the pusher mechanism. This multi-functionality reduces the need for separate dedicated components for each function.
3Force
If a post puller has more components, then the pulling capability is enhanced, but the cost increases
Solution Approach 1:
The post puller is designed as modular segments that can be manufactured separately and assembled. This segmentation allows for standardized production of individual components (mast sections, arm sections, pusher sections) that can be mass-produced at lower cost, then assembled to achieve the necessary pulling capability.
Solution Approach 2:
By merging functions into fewer integrated components rather than using multiple separate mechanisms, the overall manufacturing cost is reduced. The integrated mast-arm-pusher assembly requires fewer separate parts to manufacture, assemble, and maintain, directly lowering production costs while preserving pulling capability.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The system reduces complexity and cost while improving operational efficiency and reducing the risk of failure by providing a compact and effective mechanism for pulling and installing highway guardrail posts with enhanced mechanical stability and ease of use.
Implementation Method 1
the pusher being configured to increase in length to drive the first location of the elongated arm away from a ground surface and thereby change the angle relative to the mast
Data Source
AI summary
A system for pulling posts is disclosed. The system for pulling posts comprises a mast extending along a direction having a vertical component, an elongated arm rotatably and pivotably supported by the mast and extending at an angle relative to the mast, a pusher with first and second opposite ends, the first end of the pusher being configured to support the elongated arm at a first location of the elongated arm, and the second end of the pusher being configured to contact a ground surface, the pusher being configured to increase in length to drive the first location of the elongated arm away from a ground surface and thereby change the angle relative to the mast, and a pole attachment site at a second location of the elongated arm.