Demolition Tool Tooth Block Stress Dissipation
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Solution Overview
Problem
Demolition tools face rapid wear issues due to the abrasive nature of materials like concrete and scrap iron, leading to excessive stress on wear surfaces, which can result in premature failure.
Innovation Solution
A tooth block design featuring a monolithic structure with a first and second tooth shroud, connected by a central member, incorporating a cut-out and impact member to dissipate forces and reduce stress concentrations, thereby enhancing durability and wear resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional wear packs are used with exposed fasteners, then the wear pack can be retained on the jaw set, but the fasteners are subjected to relatively high stresses during operation leading to premature failure
Solution Approach 1:
The invention extracts the fasteners from the load-bearing path by introducing a wear pack body that completely encloses the fasteners. The wear pack body transfers demolition forces directly to the jaw set through its outer surface, removing the fasteners from exposure to high stresses during operation.
Solution Approach 2:
The invention segments the wear pack into distinct functional portions: a wear pack body that contacts and transfers demolition forces, and an inner surface that retains the fasteners. This segmentation allows the fasteners to be isolated from the high-stress environment while still providing secure retention.
2Productivity
If the demolition tool is used to crush or cut abrasive materials like concrete and scrap iron, then the tool can perform its demolition function, but the wear surfaces experience rapid wear leading to premature failure
Solution Approach 1:
The invention provides beforehand protection by using a wear pack made of wear-resistant material that is specifically designed to withstand abrasive materials. The wear pack body acts as a protective barrier between the jaw set and the abrasive materials, cushioning the impact and reducing wear on the underlying components.
3Reliability
If a monolithic tooth block structure is used, then stress concentrations are reduced and durability is enhanced, but the device complexity increases compared to separate wear packs
Solution Approach 1:
The invention merges the wear pack body, impact members, and fastener retention features into a single monolithic tooth block structure. This integration eliminates the need for separate wear packs and fasteners, reducing the number of components while enhancing durability by eliminating stress concentrations at interfaces between separate parts.
Data Source
AI summary
A tooth shroud for a demolition tool is disclosed wherein forces produced during demolition operations may be dissipated so as to avoid excessive forces at stress points. A tooth block for a demolition tool comprises a first tooth shroud and a second tooth shroud. The first and second tooth shroud each comprising a body having a front wall and an end wall wherein a cavity is enclosed by the front wall and the end wall; an impact member extending longitudinally from the body; and a cut-out disposed on the end wall, wherein the first tooth shroud is connected to the second tooth shroud.