Gantry Stage Beam Truss Design for Weight Reduction
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Solution Overview
Problem
Conventional gantry-type stage structures are heavy due to the need for numerous support plates for structural strength, making them cumbersome for processing operations and requiring entire beam replacement when screw holes are damaged, leading to inconvenient maintenance.
Innovation Solution
A gantry-type stage beam design featuring a lower and upper plate, front and rear plates, lateral plates, and a truss unit with joint and diagonal members, along with a thread-formed unit for weight reduction and modular maintenance, allowing for secure mounting of optical processing devices without compromising structural integrity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If numerous support plates are disposed compactly to provide sufficient structural strength, then the beam structural strength is improved, but the beam weight increases and becomes heavy
Solution Approach 1:
The beam is divided into multiple modular components including upper plate, lower plate, front plate, rear plate, lateral plates, and truss units. Each component can be independently manufactured and assembled, allowing the structure to achieve sufficient strength through modular configuration rather than requiring a single heavy solid structure.
Solution Approach 2:
The patent transitions from a conventional solid rectangular beam structure to a three-dimensional truss framework. By utilizing spatial arrangement of triangular truss units with diagonal members, the structure achieves high strength-to-weight ratio through dimensional optimization, distributing loads efficiently across multiple planes.
2Reliability
If the whole body of the beam is renewed when screw holes are damaged, then the structural integrity is maintained, but the maintenance becomes inconvenient and time-consuming
Solution Approach 1:
The beam is segmented into multiple replaceable components (upper plate, lower plate, front plate, rear plate, lateral plates, and truss units). When screw holes or thread-formed members are damaged, only the specific damaged component needs to be replaced rather than the entire beam, significantly reducing maintenance time and effort.
Solution Approach 2:
The patent implements a modular replacement strategy where damaged components such as thread-formed members or entire plates can be discarded and replaced with new ones. The undamaged portions of the beam structure are recovered and reused, reducing waste and maintenance costs while maintaining structural integrity.
3Adaptability or versatility
If a hollow body with numerous screw holes is used for mounting optical processing devices, then the mounting capability is improved, but the structural complexity increases and weight increases
Solution Approach 1:
The mounting functionality is segmented into separate thread-formed members that can be independently attached to different plates. This allows multiple mounting locations without requiring a complex hollow body structure, as each plate can accommodate multiple thread-formed members for device mounting.
Solution Approach 2:
The patent extracts the mounting function from the main beam structure by using separate thread-formed members that can be attached to the plates. This separation allows the beam structure to remain simple while still providing versatile mounting capabilities through the add-on thread-formed members.
Data Source
AI summary
A beam of a gantry-type stage structure includes an accommodating space defined by a lower plate, an upper plate, a front plate, a rear plate and two lateral plates. A truss unit is disposed in the accommodating space, and includes lower and upper joint members which are respectively disposed on the lower and upper plates, first and second vertical members which extend uprightly from the lower and upper joint members, respectively, and diagonal members each of which extends to interconnect one lower joint member and an adjacent upper joint member to provide the beam with a great structural strength and a lightweight structure.