Gear-Driven Pull-Out Table to Reduce Cost and Sliding Rail Complexity
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Solution Overview
Problem
Conventional pull-out tables require costly and precise sliding rails, leading to unsmooth operation and increased manufacturing complexity.
Innovation Solution
A gear type pull-out table design replaces sliding rails with toothed racks and a gear assembly, allowing the table boards to move in opposite directions for smooth extension and retraction, reducing costs and manufacturing difficulties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If sliding rails are used to enable synchronous pulling of table boards, then the table boards can move smoothly, but the cost increases and manufacturing precision requirements increase
Solution Approach 1:
The patent replaces the traditional sliding rail mechanical system with a gear-driven mechanical system. The gear assembly engages with toothed racks on both table boards, converting the sliding motion into gear rotation and back to synchronized linear motion. This substitution eliminates the need for precision sliding rails while maintaining smooth operation through the self-aligning nature of gear engagement.
Solution Approach 2:
The gear assembly acts as an intermediary mechanism between the two table boards. Instead of directly sliding the table boards against each other or against rails, the gear serves as a mediating element that coordinates their movement. The gear's engagement with both toothed racks ensures synchronous motion while reducing the direct mechanical contact requirements between table boards.
2Stability of the object's composition
If two sliding rails are installed on both sides of the table, then synchronous movement is achieved, but the cost increases
Solution Approach 1:
The patent merges the functions of two separate sliding rails into a single gear assembly. The gear simultaneously engages with toothed racks on both table boards, providing the synchronous movement function that previously required two independent rail systems. This consolidation reduces component count, material costs, and assembly complexity while maintaining the stability of synchronous movement.
Solution Approach 2:
The gear assembly performs multiple functions: it provides synchronous movement coordination, acts as a mechanical linkage between table boards, and serves as a cost-effective alternative to precision rails. This multi-functionality reduces the overall system complexity and cost while achieving the same stability in synchronous movement.
3Manufacturing precision
If sliding rails are used for table board extension, then precise positioning is achieved, but manufacturing precision requirements increase
Solution Approach 1:
The patent substitutes the precision-dependent sliding rail system with a gear-driven system that is more tolerant of manufacturing variations. The gear's tooth engagement provides inherent positioning through the discrete tooth structure, and the self-centering nature of gear meshing reduces sensitivity to manufacturing tolerances compared to sliding rail interfaces.
Solution Approach 2:
The patent changes the fundamental mechanical parameter from sliding contact to gear tooth engagement. This parameter change transforms the positioning mechanism from one requiring precise continuous contact (sliding rails) to one using discrete tooth engagement, which is inherently more tolerant of manufacturing variations while still achieving precise positioning through the gear's geometric constraints.
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
The gear type pull-out table achieves cost reduction and improved smoothness in operation by using toothed racks and a gear assembly, while also enabling efficient space adjustment through the folding mechanism.
Implementation Method 1
The gear assembly comprises a first toothed rack, a second toothed rack, and a gear. The gear is in synchronous engagement with the first toothed rack and the second toothed rack. The first table board and the second table board are driven to move in opposite directions through the synchronous engagement of the first toothed rack, the second toothed rack, and the gear
Data Source
AI summary
A gear type pull-out table including a table frame, first and second table boards symmetrically disposed on the table frame, an extended table board, and a gear assembly, is provided. The extended table board is disposed between the first and second table boards. The gear assembly is positioned in the table frame, corresponding to the extended table board. The gear assembly includes a first toothed rack fixed to the first table board, a second toothed rack fixed to the second table board, and a gear in synchronous engagement with the first and second toothed racks. The first and second toothed racks are disposed in parallel on two sides of the gear. The first and second table boards are driven to move in opposite directions through the synchronous engagement of the first and second toothed racks and the gear to join or separate the first and second table boards.