Box Body Connecting Element Form-Fit Alignment
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Solution Overview
Problem
The assembly of box bodies for trucks, semi-trailers, and trailers is labor-intensive due to large panel dimensions and tight tolerances, requiring precise alignment and multiple assembly steps.
Innovation Solution
The use of connecting halves that engage in a form-fitting manner parallel to the longitudinal extension of the box body, allowing for precise positioning and self-centering, which simplifies the assembly process and prevents unintentional displacement, thereby reducing the number of assembly steps and increasing efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the connecting halves are joined with precise alignment to achieve tight tolerances, then the manufacturing precision is improved, but the assembly time and labor effort increase
Solution Approach 1:
The connecting halves are designed with pre-formed engagement geometries (protrusions and recesses) that automatically guide alignment during assembly. The longitudinal extension of the protrusion into the recess creates a self-aligning mechanism that establishes precise positioning before final fastening, eliminating the need for separate alignment operations and reducing assembly time while maintaining tight tolerances
2Reliability
If the connecting halves are designed with complex engagement mechanisms to prevent displacement, then the reliability is improved, but the device complexity increases
Solution Approach 1:
The connecting element is divided into two separate halves (first and second connecting halves) that are joined together. Each half has a simplified geometry with a protrusion and recess respectively, avoiding the need for complex single-piece connecting elements. The segmentation allows for easier manufacturing and assembly while the interlocking protrusion-recess geometry provides reliable displacement prevention
Solution Approach 2:
The protrusion of one connecting half is designed to fit into the recess of the other connecting half, creating a nested or interlocking configuration. This nesting mechanism provides inherent mechanical interlocking that prevents unintentional displacement in all spatial directions while maintaining simple geometries for both connecting halves
3Productivity
If the connecting halves are pre-positioned with form fit to reduce assembly steps, then the productivity is improved, but the manufacturing precision requirements increase
Solution Approach 1:
The connecting halves are designed to self-align and self-position through their geometric features (protrusion and recess) during assembly. The longitudinal extension of the protrusion into the recess creates automatic centering and positioning actions that do not require external alignment tools or operations. This self-service mechanism achieves precise form fit while maintaining high assembly speed and productivity
Data Source
Figure 1
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Figure 3~4
AI summary
The body has a side wall panel (2) connected with a roof panel (3) and/or a base panel by a connecting element (7) e.g. corner reinforcement. The connecting element includes a connecting half (13) associated to the side wall panel, and connecting half (12) corresponding to the roof panel and/or the base panel. The connecting halves form a form closure in a horizontal direction parallel to a longitudinal extension of the body. The halves are positioned relative to each other in joining directions (x, y) by abutment surfaces (14, 15).