Parallel Guide Mast Small Parts Device Bending Load Reduction
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Solution Overview
Problem
Existing small parts devices suffer from high energy consumption due to rigid mast designs under bending loads, leading to low payload ratios and high drive power requirements, which increases energy consumption and reduces efficiency.
Innovation Solution
A small parts device with a lifting platform and horizontally movable load handling device, where the guide device features two parallel guide masts with an intermediate space, allowing the lifting platform to be positioned between them, reducing bending loads on the masts and enabling a lighter, more efficient design with lower mass and power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a rigid mast design is used to support the lifting platform under bending loads, then the structural strength is improved, but the mass of the guide device increases significantly
Solution Approach 1:
The single rigid mast is segmented into two parallel guide masts that are spaced apart. The lifting platform is positioned between these two masts, which distributes the bending loads across multiple structural elements rather than concentrating them on a single mast, thereby reducing the mass requirement of each individual mast while maintaining overall structural strength.
Solution Approach 2:
The structural support system transitions from a single vertical dimension (one mast) to a two-dimensional arrangement (two parallel masts with horizontal spacing). This spatial distribution in the horizontal dimension allows the system to resist bending moments more efficiently by creating a wider base of support, reducing the need for excessive mass in each mast.
2Device complexity
If heavy travel drives are moved together with the carriages, then the drive system can be compact, but the payload ratio decreases due to increased accelerating mass
Solution Approach 1:
The travel drives are extracted from the moving carriages and repositioned as stationary drive units on the ground. This separation allows the carriages to be lighter and have lower accelerating mass, improving the payload ratio, while the stationary drives remain compact and efficient in their fixed positions.
Solution Approach 2:
A cable-driven transmission system acts as an intermediary between the stationary travel drives and the moving carriages. The cables transmit the driving force from the fixed drive units to the moving carriages, enabling the separation of the drive mass from the carriage mass while maintaining effective power transmission.
3Reliability
If the mast is designed to be very rigid to handle bending moments, then the structural reliability is improved, but the drive power required increases due to high dead weight
Solution Approach 1:
The single rigid mast structure is segmented into two parallel guide masts with reduced individual mass. By distributing the structural function across multiple elements, each mast can be lighter while the overall system maintains high reliability through the combined structural support and load distribution capability.
Solution Approach 2:
The two-guide-mast configuration creates a counterbalancing structural arrangement where the masts work together to resist bending moments. The horizontal spacing between masts creates a lever arm effect that counteracts the bending loads, allowing for reduced mast mass while maintaining structural reliability and reducing the drive power needed to accelerate the system.
Data Source
Figure 1
Figure 2A~2B
Figure 3A~3C
AI summary
Small parts device (101) with a lifting platform (4) vertically movable on a guide device (3), a horizontally movable load handling device (5) arranged on the lifting platform (4) and a carriage (1, 2) arranged at an upper and lower end region of the guide device (3) for the horizontal movement of the small parts device (101), wherein the guide device (103) has two guide masts (3) arranged at least largely parallel to each other with a space (104) between them and the lifting platform (4) is arranged in the space (104).