Position Adjustment Apparatus Using Compression Spring
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Solution Overview
Problem
Existing position adjustment apparatuses for double-doors, such as those using torsion springs and pull springs, suffer from reduced useful lifetime due to metal fatigue and complex structures that increase manufacturing costs and decrease assembly speed.
Innovation Solution
A position adjustment apparatus featuring a housing with a compression spring between a guiding shaft and a rear shaft, eliminating the need for torsion or pull springs, simplifying the structure, reducing manufacturing costs, and enhancing assembly speed by using pivotal attachment members for secure attachment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If torsion springs or pull springs are used in the position adjustment apparatus, then the apparatus can achieve the closing sequence control function, but the useful lifetime is reduced due to metal fatigue and fracture
Solution Approach 1:
The patent removes the torsion springs or pull springs from the system and replaces them with a cam mechanism and linkage system. The cam profile is specifically designed to provide the required closing sequence control without relying on springs that are subject to metal fatigue, thereby extracting the problematic component while retaining the essential function.
Solution Approach 2:
The invention replaces the expensive and short-lived torsion/pull springs with a more durable cam and linkage mechanism. The cam mechanism, being a rigid mechanical system without elastic deformation cycles, has significantly longer service life and does not suffer from the same metal fatigue issues as spring-based systems.
2Ease of operation
If arresting cam assembly and connecting shaft are installed between guiding shaft and rear shaft, then linkage movements can be achieved, but the overall structure is complicated and manufacturing speed is reduced
Solution Approach 1:
The patent integrates the cam mechanism directly with the guiding shaft and rear shaft assembly, merging what were previously separate components (arresting cam assembly, connecting shaft, guiding shaft, rear shaft) into a more unified structure. This reduces the number of parts and simplifies the overall device while maintaining the necessary linkage movements for door closing sequence control.
Solution Approach 2:
The cam mechanism serves multiple functions: it controls the closing sequence, provides the linkage movement between shafts, and eliminates the need for separate spring assemblies. This multi-functionality reduces device complexity while maintaining operational capability.
3Ease of operation
If multiple shafts and spring assemblies are used, then the closing sequence control function is achieved, but the manufacturing cost increases
Solution Approach 1:
The patent removes the expensive spring assemblies (torsion or pull springs) from the design and replaces them with a cam-based mechanical system. This extraction of problematic components directly reduces manufacturing costs while maintaining the closing sequence control function through the cam profile design.
Solution Approach 2:
The invention replaces costly spring components with a more economical cam and linkage system that achieves the same functional result. The cam mechanism, being simpler in construction and without the need for precision spring manufacturing, reduces overall manufacturing costs while providing reliable closing sequence control.
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 apparatus achieves a simplified structure, reduced manufacturing costs, and extended useful lifetime by utilizing a compression spring to drive the guiding and rear shafts, ensuring efficient and reliable double-door closing without the drawbacks of torsion or pull springs.
Implementation Method 1
a spring moveably attached on the connecting shaft and arranged between the first retaining portion and the second retaining portion; wherein the spring is a compression spring
Data Source
AI summary
A position adjustment apparatus includes a housing main body, a connecting shaft, a spring, a guiding shaft and a rear shaft. The connecting shaft and the spring are installed between the guiding shaft and the rear shaft, and the spring is configured to be a compression spring; therefore, the structure of the position adjustment apparatus is simplified, manufacturing costs are reduced, and the assembly and manufacturing speed of the apparatus are increased along with the use of the compression spring to reduce the destruction of the spring structure due to pulling thereon. Consequently, as the guiding shaft drives the connecting shaft to actuate the rear shaft, the objective of prolonging the useful lifetime of the position adjustment apparatus can be achieved without the use of any torsion springs or pull springs.