Movable Jaw Mounting Assembly for Jaw Crusher CSS Adjustment
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Solution Overview
Problem
Conventional jaw crusher retraction assemblies for adjusting the close side setting (CSS) are complex, requiring many components and increasing maintenance needs due to stress concentrations and complicated actuator systems.
Innovation Solution
A simplified mounting assembly using a pair of linear hydraulic actuators mounted on either side of the toggle unit to adjust the CSS and maintain the toggle unit, reducing stress on components and allowing efficient retraction and positional adjustment of the movable jaw.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If conventional retraction assemblies with complicated actuators and hydraulic jacks are used to adjust CSS, then the adjustment function is achieved, but the device complexity increases and maintenance frequency increases
Solution Approach 1:
The patent combines the retraction assembly and CSS adjustment unit into a single integrated mechanism. The linear actuator serves dual purposes: it provides retraction force to maintain pressure on the toggle assembly and simultaneously adjusts the CSS by moving the movable jaw. This merging eliminates the need for separate actuators and hydraulic jacks, reducing component count while maintaining both functions.
Solution Approach 2:
The linear actuator is designed as a multi-functional component that performs both retraction and CSS adjustment operations. By positioning the actuator to engage with the toggle assembly and movable jaw simultaneously, a single component executes multiple tasks that previously required separate systems, thereby simplifying the overall device architecture.
2Ease of operation
If conventional retraction assemblies with many moving parts are used, then the CSS adjustment is achieved, but the reliability decreases due to increased maintenance needs
Solution Approach 1:
The integration of retraction and CSS adjustment into one mechanism reduces the number of moving parts and potential failure points. Fewer components mean less wear, fewer lubrication points, and reduced maintenance requirements, thereby improving system reliability while maintaining operational capability.
3Ease of operation
If conventional complicated actuator systems are used for retraction, then the retraction function is achieved, but the stress concentrations on components increase
Solution Approach 1:
The integrated design distributes forces more evenly across the toggle assembly components. The linear actuator applies retraction force in a manner that works in conjunction with the toggle mechanism's natural force distribution, reducing stress concentrations that occur with separate, overloaded components.
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 robust, reliable, and efficient mechanism for adjusting the CSS, minimizing maintenance needs and stress concentrations, while maintaining pressure on the toggle assembly components during crushing operations.
Implementation Method 1
at least one mechanical actuator attached at a first end to the support frame and at a second end to a part of the toggle unit so as to provide a pulling and/or pushing force to the toggle unit
Implementation Method 2
the force transmission wall configured to transmit impact loading forces from the moveable jaw to the support frame
Implementation Method 3
capable of being moved towards the force transmission wall by the actuator to retain pressure on the toggle unit in retraction
Data Source
AI summary
A movable jaw mounting assembly to provide adjustment of the close side setting (CSS) of a movable jaw (105) and to act as a retraction assembly or assist with retraction. The assembly comprises a pair of linear actuators (122) that are coupled between a force transmission wall (302) of a support frame (116) and a region of the toggle unit so as to move the toggle unit towards and away from the force transmission wall end to allow insertion and removal of spacers and/or shims (126).