Pick Shank Resilient Collapse for Secure Press Fit Mounting
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Solution Overview
Problem
Existing tools used in formation degradation processes such as asphalt milling, mining, and excavating face wear issues due to inefficient mounting and removal mechanisms, leading to increased downtime and costs.
Innovation Solution
A pick assembly with a shank configured for a press fit within a block, featuring a longitudinal recess for resilient collapse and a tapered region for complementary surface contact, along with a spring clip for secure axial positioning, reduces wear and facilitates easier replacement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a press fit connection is used between the shank and block, then the pick achieves secure mounting and durability, but the shank becomes difficult to remove and replace
Solution Approach 1:
The shank is segmented into multiple sections: a first section with a first diameter for press fit insertion, a second section with a second diameter for removal, and a third section with a third diameter for structural support. This segmentation allows the shank to be inserted securely while enabling easy removal by applying force to the appropriately sized second section.
Solution Approach 2:
Different sections of the shank have different diameters optimized for different functions. The first section has a larger diameter for secure press fit mounting in the block, while the second section has a smaller diameter that fits within a recess to enable easy removal. This local variation in geometric properties resolves the contradiction between secure mounting and ease of removal.
2Reliability
If a tapered shank with interference fit is used, then the pick achieves secure mounting in the block, but the insertion process becomes complex and time-consuming
Solution Approach 1:
The shank is divided into distinct sections with different diameters. The first section is designed for quick press fit insertion into the block, while the second section fits into a recess for positioning. This segmentation simplifies the insertion process compared to complex tapered interference fits, reducing insertion time while maintaining secure mounting.
Solution Approach 2:
The block is pre-configured with a recess that receives the second section of the shank. This preliminary structural preparation allows for quick alignment and insertion of the shank without requiring complex alignment procedures or time-consuming adjustment during installation.
3Ease of operation
If the shank is made resilient to allow collapse during insertion, then the pick achieves easier insertion into the block, but the structural strength of the shank may be compromised
Solution Approach 1:
The shank is segmented into a first section for press fit insertion, a second section for removal, and a third section for structural support. The third section with its larger diameter and positioning in the block provides the necessary structural strength, while the other sections are optimized for insertion and removal operations. This segmentation allows resilience where needed without compromising overall strength.
Solution Approach 2:
Different sections of the shank have different geometric properties optimized for different functions. The first and second sections have smaller diameters that allow for resilient deformation during insertion and removal operations, while the third section has a larger diameter that provides the necessary structural strength. This local variation in properties resolves the contradiction between ease of insertion and structural strength.
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 enhances the durability and longevity of the pick by maintaining a secure press fit while allowing for easier removal and installation, reducing operational downtime and costs associated with tool replacement.
Implementation Method 1
The recess allows the shank to resiliently collapse upon insertion into the bore while maintaining a press fit between the bore and the shank
Implementation Method 2
a tapered region for complementary surface contact
Data Source
AI summary
In one aspect of the present invention, a pick assembly is configured that comprises a pick shank configured to be press fit directly within a bore of a block. The pick shank comprises an inside and outside surface. The pick comprises a pick head opposite the shank. The shank comprises at least one longitudinal recess extending towards the pick head along the shank from a distal end of the shank. The recess allows the shank to resiliently collapse upon insertion into the bore while maintaining a press fit between the bore and the shank.