Operator Platform Suspension With Dual Linkages for Pitch Control
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Solution Overview
Problem
Current suspension systems for utility vehicles fail to effectively accommodate motion between the frame and operator platform, leading to discomfort and reduced control during uneven terrain, as they do not independently address pitching forces from both front and rear ground-engaging elements.
Innovation Solution
A suspension system comprising two independent four-bar linkage assemblies, each with its own instant center, that secure the operator platform to the frame, allowing for independent motion adjustment to mitigate pitching forces from both front and rear ground-engaging elements, thereby maintaining a stable operator platform orientation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single linkage assembly is used to connect the operator platform to the frame, then the device complexity is reduced, but the ability to independently accommodate pitching forces from front and rear ground-engaging elements deteriorates
Solution Approach 1:
The suspension system is divided into two independent four-bar linkage assemblies: a first linkage assembly that accommodates pitching forces from the front ground-engaging element, and a second linkage assembly that accommodates pitching forces from the rear ground-engaging element. Each linkage assembly has its own instant center and operates independently, allowing the system to handle multiple pitching forces simultaneously without excessive complexity in a single integrated mechanism.
2Stability of the object's composition
If the operator platform is rigidly secured to the frame, then the stability and control are improved, but the comfort and ability to accommodate uneven terrain deteriorates
Solution Approach 1:
The operator platform is dynamically connected to the frame through four-bar linkage assemblies that allow controlled motion. The linkages enable the platform to pivot and adjust its position in response to pitching forces from the ground-engaging elements, absorbing impacts from uneven terrain while maintaining operational stability. The dynamic connection adapts to varying terrain conditions rather than rigidly resisting all motion.
3Object-affected harmful factors
If linkage assemblies are positioned to accommodate front pitching forces, then the comfort is improved, but the ability to accommodate rear pitching forces independently deteriorates
Solution Approach 1:
The suspension system uses two separate four-bar linkage assemblies with distinct instant centers: the first linkage assembly is positioned and configured to accommodate pitching forces from the front ground-engaging element, while the second linkage assembly is positioned and configured to accommodate pitching forces from the rear ground-engaging element. This segmentation allows each linkage to independently handle its designated pitching force without interference from the other.
Data Source
AI summary
A utility vehicle includes a frame, a first ground-engaging element coupled to a first portion of the frame, a second ground-engaging element coupled to a second portion of the frame, an operator platform supported by the frame, and a suspension system coupled between the operator platform and the frame to accommodate motion of the frame relative to the operator platform. The suspension system includes a first linkage assembly coupled to the operator platform and operable to accommodate motion of the second portion of the frame relative to the operator platform and a second linkage assembly having a first end coupled to the frame to secure the suspension system to the frame and a second end coupled to the first linkage assembly. The second linkage assembly being operable independent of the first linkage assembly to accommodate motion of the first portion of the frame relative to the operator platform.