Demolition Tool Jaw Assembly Modular Replacement System
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Solution Overview
Problem
Demolition tools used for crushing and cutting materials face rapid wear due to the abrasive nature of materials like concrete and scrap iron, leading to frequent replacement of wear surfaces on jaw assemblies.
Innovation Solution
A modular system for removable mounting of replaceable parts, comprising a work module and work plate with tooth members and bosses, which are securely engaged onto a jaw assembly using seating portions and apertures, allowing for easy replacement and reduced wear on the jaw surfaces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of repair
If conventional fastening techniques are used to attach working parts to the jaw assembly, then the working parts can be securely retained, but the replacement and maintenance of worn parts becomes time-consuming and complex
Solution Approach 1:
The working part is divided into a work plate and multiple separate work modules. Each module can be independently removed from the jaw assembly through individual seating portions, allowing selective replacement of only the worn modules rather than the entire work plate assembly. This segmentation enables rapid maintenance by replacing individual tooth modules while retaining the base plate and functional modules.
Solution Approach 2:
The mounting system transitions from fixed conventional fastening to a dynamic, easily changeable configuration. The work modules are designed with mounting elements that engage with seating portions containing slots, allowing for quick insertion and removal. This dynamic mounting mechanism enables the working parts to be easily adjusted, replaced, or reconfigured during maintenance operations.
2Duration of action of stationary object
If replaceable working parts are used on the jaw assembly, then the lifespan of the jaw components is extended, but the complexity of the mounting system increases
Solution Approach 1:
The mounting system is segmented into standardized components: work plates with apertures, work modules with mounting elements, and seating portions with slots. Each component has a simple, well-defined function and interface. The segmentation allows for modular assembly where complexity is distributed across simple, interchangeable parts rather than concentrated in a single complex fastening mechanism.
Solution Approach 2:
The seating portions are designed with universal slots that can accommodate multiple different work modules. The mounting elements on the modules are standardized to fit these slots, creating a universal interface. This universality allows the same base plate and seating portion structure to support various module configurations, reducing overall system complexity through standardization.
3Productivity
If the jaw assembly is designed for easy module replacement, then maintenance efficiency is improved, but the structural integrity and retention security of the working parts may be compromised
Solution Approach 1:
The boss and aperture interface provides precise positional alignment and centered loading for the work modules. The curved or rounded geometry of the boss fitting into the aperture ensures proper orientation and distributes mechanical loads evenly across the mounting interface, maintaining structural integrity while enabling easy replacement.
Solution Approach 2:
The mounting system combines multiple retention mechanisms within a unified structure: the boss-aperture alignment feature, the slot-based mechanical retention, and the overall modular construction. This composite approach integrates several functions (alignment, retention, load distribution) into a single integrated mounting system that provides both ease of replacement and secure retention.
Data Source
AI summary
A jaw assembly for a demolition tool is disclosed. The jaw assembly may have a support portion centrally disposed on a second jaw. The support portion may have a first contact surface and an aperture disposed thereon. A work plate may be mounted on the support portion and may have a plate member in abutting contact with the support portion. The work plate may also have a tooth member and a boss extending in a direction opposite to the tooth member. The boss may be engaged to the aperture. The jaw assembly may have a pair of seating portions disposed on the second jaw, each seating portion having a slot. The jaw assembly may also have a work module mounted in each seating portion. The work module may have a base, a tooth, and a mounting element extending in a direction opposite to the tooth and engaging the seating portion.