Wear Tooth Blocking Pin Elastic Deformation Fastening
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Solution Overview
Problem
The existing wear assemblies for earth moving machines require time-consuming and hazardous hammering processes for fastening and can result in increased downtime due to frequent replacement of wear teeth, affecting machinery productivity.
Innovation Solution
A wear assembly featuring a blocking pin with elastically deformable elements that allows for rapid and secure attachment and detachment between the wear tooth and adapter, eliminating the need for hammering and enabling easy mass production at a lower cost.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If traditional hammering process is used to fasten wear teeth to adapter, then secure connection is achieved, but assembly time increases and operator safety risks increase
Solution Approach 1:
The patent replaces the traditional hammering mechanical system with a press-fit system using a pressing device. The wear tooth is inserted into the adapter with a pressing force that deforms the wear tooth elastically to create a secure interference fit, eliminating the need for hammering while maintaining connection strength and reducing assembly time.
Solution Approach 2:
The patent changes the physical state of the wear tooth during assembly by applying controlled elastic deformation through pressing. The wear tooth is pressed with sufficient force to deform elastically and create an interference fit with the adapter, transforming the assembly process from impact-based to pressure-based, thereby reducing assembly time while maintaining secure connection.
2Reliability
If wear teeth are frequently replaced due to wear or loss, then machinery continues to operate, but downtime increases affecting productivity
Solution Approach 1:
The patent implements preliminary action by designing the wear tooth and adapter with pre-aligned through-holes and positioning features. This preliminary alignment ensures that when wear teeth need replacement, they can be quickly removed and new ones installed without time-consuming alignment procedures, thereby reducing downtime and maintaining productivity.
Solution Approach 2:
The patent segments the wear tooth design into modular components with standardized through-holes and geometric coupling features. This segmentation allows for easy removal and replacement of individual wear teeth without affecting the adapter or other wear teeth, enabling rapid maintenance and minimizing machinery downtime.
3Stability of the object's composition
If complex fastening systems are used to secure wear teeth, then connection stability is improved, but manufacturing cost and complexity increase
Solution Approach 1:
The patent merges multiple functions into the simple press-fit mechanism. The interference fit simultaneously provides connection stability, positioning accuracy, and stress distribution. The geometric coupling features and aligned through-holes are integrated into the basic wear tooth and adapter design, eliminating the need for separate fastening components and reducing overall system complexity while maintaining connection stability.
4Strength
If traditional fastening methods are used, then connection is secure, but manufacturing and assembly cost increase
Solution Approach 1:
The patent applies the principle of disposable components by designing the wear tooth as a replaceable, relatively inexpensive component that can be quickly replaced when worn. The simple press-fit design with standardized through-holes reduces manufacturing complexity and cost compared to traditional fastening methods, while the wear tooth itself is designed to be economically replaceable rather than repairable.
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 solution provides a faster, safer, and more efficient assembly process with reduced downtime, increased component stability, and extended useful life by ensuring precise coupling and minimizing operator risks, while being cost-effective and easy to maintain.
Implementation Method 1
a blocking pin (16) between wear tooth (2) and the adapter (10), inserted in at least one through hole (8, 8') and in the pin cavity (14) rotatably around a rotation axis (R)
Data Source
Figure 1a~1c
Figure 2~6
Figure 7~11
AI summary
Wear assembly (1) comprising a wear tooth (2) comprising a wall (4) that defines a pocket (6) and at least one through hole (8, 8') communicating with the pocket, an adapter (10) with a connection point (12) inserted into the pocket (6) in a removable manner and defining a pin cavity (14) aligned with the through hole (8, 8'), a blocking pin (16) between the tooth (2) and adapter (10), inserted in the through hole (8, 8') and in the pin cavity (14) rotatably and comprising at least a first blocking element (18), and a second blocking element (20, 20') associated to the wear tooth (2) or to the adapter (10). The elements (18, 20, 20') are mutually arranged in such a way that, through rotation of the blocking pin (16) in a direction, the first blocking element (18) intercepts the second (20, 20') to block the pin in the pin cavity (14). In addition, one of said elements (20, 20') is deformable so that, through a further rotation in the same direction, this element disengages from the other element (18) allowing the extraction of the pin from the cavity.