Space Frame Suspension Connection for Haul Trucks
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Solution Overview
Problem
Conventional space frame structures for haul trucks face challenges in dynamic applications due to loads, bending, and flexing, requiring carefully designed high-strength castings and fabrications to maintain stiffness and flexibility while ensuring proper load transfer from the dump body to the wheels, which is difficult to achieve with traditional nodal connections.
Innovation Solution
The design of a front upper suspension connection for haul trucks includes a bottom surface for welding to a front lower suspension connection, a top rear mounting surface for welding to a front upper frame connection, and a front strut attachment point that pivots to attach a front strut, with coaxial holes for a pin to pass through, providing a lightweight and durable configuration for load distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If conventional welded steel frames are used, then strength and load-bearing capacity are improved, but weight increases significantly and manufacturing complexity increases
Solution Approach 1:
The frame is divided into multiple tubular members connected by nodal connections, creating a space frame structure that distributes loads efficiently across segments rather than requiring a solid welded steel frame
Solution Approach 2:
The nodal connections integrate multiple materials and connection methods (welding, mechanical fastening) to create a composite structure that achieves high strength-to-weight ratio by combining the advantages of different connection techniques
2Strength
If conventional welded steel frames are used, then strength is improved, but manufacturing complexity and time increase
Solution Approach 1:
The frame structure is segmented into modular components (tubular members and nodal connections) that can be manufactured separately and assembled, reducing overall manufacturing complexity
Solution Approach 2:
Nodal connections are designed to be pre-assembled with tubular members using standardized procedures, allowing for preliminary preparation and reduction of on-site welding complexity
3Weight of moving object
If fabricated nodal connections are used in space frames, then weight is reduced, but reliability under dynamic loads deteriorates
Solution Approach 1:
The nodal connections feature curved transition regions and rounded geometries that distribute stress more evenly under dynamic loading conditions, improving reliability while maintaining the lightweight space frame structure
Solution Approach 2:
The nodal connections are designed with optimized geometric parameters and material properties to withstand dynamic loads, including carefully designed curvature radii and wall thickness variations that enhance structural integrity
4Stability of the object's composition
If high-strength castings and fabrications are used, then stiffness and flexibility characteristics are improved, but manufacturing complexity increases
Solution Approach 1:
The structure is segmented into standardized nodal connections and tubular members with consistent design parameters, allowing for simplified manufacturing processes while achieving the required stiffness and flexibility characteristics through the overall space frame configuration
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
This configuration ensures reliable load transfer and distribution between the dump body and the space frame, accommodating dimensional variations and component deflection, while maintaining structural integrity and flexibility under dynamic conditions.
Implementation Method 1
a bottom surface configured to weldably attach to a front lower suspension connection fabrication
Implementation Method 2
a top rear mounting surface configured to weldably attach to a front upper frame connection fabrication
Implementation Method 3
a front strut attachment point located below the top rear mounting surface and the top front mounting surface configured to pivotably attach a front strut of a front suspension system
Implementation Method 4
The front strut attachment point can include a hole passing through the top rear mounting surface, a coaxial hole passing through the top front mounting surface, and a front strut attachment pin configured to pass through the top rear mounting surface, the top front mounting surface, and a top mounting hole integral to the front strut
Data Source
AI summary
A front upper suspension connection for a space frame comprises a bottom surface fixedly attachable to a front lower suspension connection; a top rear mounting surface fixedly attachable to a front upper frame connection; a top front mounting surface fixedly attachable to a first elongate support member; a front strut attachment point located below the top rear mounting surface and the top front mounting surface to pivotably attach a front strut; and a lower rear mounting surface located below the top rear mounting surface fixedly attachable to a second elongate support member. The front strut attachment point can include a hole passing through the top rear mounting surface, a coaxial hole passing through the top front mounting surface, and a front strut attachment pin configured to pass through the top rear mounting surface, the top front mounting surface, and a top mounting hole integral to the front strut.