Jaw Crusher Retraction Assembly Compact Design
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Solution Overview
Problem
Conventional jaw crusher retraction assemblies experience accelerated wear and torque at pivot mountings due to loading forces and have a lengthy axial length that complicates mounting in confined spaces, necessitating a more robust and compact solution.
Innovation Solution
A retraction assembly with a cylinder positioned close to the movable jaw, utilizing a first and second mounting boss and resiliently biased components like springs, minimizes torque and axial length, allowing for reduced stress and wear on components while maintaining control over the oscillating movement of the movable jaw.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the cylinder is positioned farther from the movable jaw in conventional retraction assemblies, then the axial length is sufficient for component mounting, but the torque resultant and stress on pivot mountings increase due to greater spatial separation
Solution Approach 1:
The cylinder is repositioned in the axial dimension to be closer to the movable jaw, fundamentally changing the spatial arrangement. This dimensional repositioning reduces the moment arm and torque resultant while the resiliently biased component compensates to maintain sufficient effective length for functionality.
Solution Approach 2:
The invention changes the positional parameter of the cylinder along the axial direction and introduces resiliently biased components with specific stiffness characteristics. This parameter optimization reduces stress and torque while maintaining the assembly's control functionality.
2Force
If the cylinder is positioned closer to the movable jaw, then the torque resultant and stress on pivot mountings are reduced, but the total axial length of the assembly is minimized which may compromise mounting flexibility
Solution Approach 1:
The retraction assembly is segmented into distinct functional zones: the cylinder positioned close to the movable jaw for torque reduction, the resiliently biased component (spring) positioned between the cylinder and first boss to provide force compensation, and the linkage elements extending to the second boss. This segmentation allows each component to optimize its position for its specific function.
Solution Approach 2:
The resiliently biased component acts as an intermediary element between the cylinder and the first boss, mediating the force transmission. It compensates for the reduced axial length by providing elastic compliance, maintaining sufficient effective length for mounting flexibility while allowing the cylinder to be positioned closer to reduce torque.
3Ease of manufacture
If conventional retraction assemblies are used with longer axial length, then component mounting is facilitated, but the assembly protrudes excessively at the lower and rear region of the jaw crusher
Solution Approach 1:
The invention repositions components along the axial dimension to compact the assembly length. The cylinder is moved axially closer to the movable jaw, and the resiliently biased component is positioned to utilize the available space efficiently, reducing the overall protrusion at the lower and rear region while maintaining mounting capability.
Solution Approach 2:
The resiliently biased component is positioned within the space between the cylinder and the first boss, effectively nesting the spring within the existing structural envelope. This nesting arrangement maximizes space utilization, reducing the overall axial length without compromising the functional integrity or mounting capability of the assembly.
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 extends the operational lifetime of jaw crusher components, facilitates mounting in confined spaces, and maintains performance without requiring significant modifications for different settings, thereby enhancing service life and operational efficiency.
Implementation Method 1
at least one resiliently biased component mounted to extend between and to resiliently bias separation of the first boss and the base
Data Source
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AI summary
A jaw crusher retraction assembly having a base, a first and second mount boss, a resiliently biased component and an actuating cylinder. The cylinder and resiliently biased component are mounted axially between respective regions of the base and the first and second bosses so as to minimise stress in the retraction assembly components and to provide a compact overall design.