Spring Guide Rod Assembly for Precise Alignment in Control Mechanisms
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Solution Overview
Problem
Existing spring guiding devices in control mechanisms suffer from poor quality of spring alignment, leading to deformation and stress on parts, which results in degradation and cracking, especially during opening and closing phases.
Innovation Solution
A spring guiding device with two sliding elements connected to axes, where each element is fixed by one end and slidably mounted on the other, with sheath-forming parts that guide the spring, ensuring correct alignment and reducing stress, and allowing for easy installation and dismantling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If traditional guiding means with orifices and rivets are used, then the device structure is simple, but poor spring alignment quality occurs leading to spring peening and part degradation
Solution Approach 1:
The patent introduces a specialized guiding device with sheath-forming parts as an intermediary element between the spring and the connecting rods. This mediator ensures proper alignment of the spring force with its trajectory, preventing direct harmful contact between the spring and traditional orifices/rivets, thereby eliminating spring peening while maintaining structural integrity.
Solution Approach 2:
The invention changes the geometric parameters of the guiding structure by using sheath-forming parts that extend over a specific length (substantially half the length of the rods). This parameter change optimizes the guidance of the spring, ensuring correct alignment without requiring complex additional components.
2Reliability
If sheath-forming parts extending over half the rod length are used, then spring alignment is improved and deformation reduced, but manufacturing complexity increases
Solution Approach 1:
The patent merges the guiding function and the structural support function into a single integrated sheath-forming part. This part simultaneously guides the spring and provides structural support, eliminating the need for separate guiding components and simplifying the manufacturing process while improving reliability.
Solution Approach 2:
The sheath-forming parts serve multiple functions: they guide the spring, align the spring force with its trajectory, support the rod ends, and prevent harmful movements. This multi-functionality reduces the overall number of components needed and simplifies the manufacturing process while enhancing device reliability.
3Reliability
If proper spring guidance is implemented, then spring deformation is reduced and part lifespan extended, but device dimensions increase
Solution Approach 1:
The patent applies local quality by concentrating the guiding function in specific sheath-forming parts located only where needed (at the ends of the rods). This localized approach provides proper spring guidance and protection only in the critical areas, avoiding unnecessary increases in overall device dimensions.
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 solution achieves correct alignment of spring force with its trajectory, minimizing deformation and stress on parts, reducing overall dimensions, and extending the lifespan of the device without visible wear after 20,000 operations.
Implementation Method 1
a compression spring mounted around these two elements and supported by its two opposite ends respectively on the two aforementioned axes
Implementation Method 2
the two aforementioned sheath-forming parts constitute by their external surface a means for guiding the spring
Data Source
Figure 1
Figure 2
Figure 3~4
AI summary
The present invention relates to a spring guide device belonging to a control mechanism, this device comprising two elements capable of sliding relative to each other and being articulated respectively to two axes, at least one of which is mechanically connected to a drive shaft, and a compression spring mounted around these two elements and supported by its two opposite ends respectively on the two aforementioned axes by means of two bases, each of its bases being articulated relative to one of the aforementioned axes. This device is characterized in that it comprises two rods (4, 5), each rod being fixed by one (4a, 5a) of its ends to one of the aforementioned bases (6, 7), and being slidably mounted by its opposite end (4b, 5b) relative to the other of the aforementioned bases (7, 6).