Tensioning Apparatus Locking Bracket Torsional Spring Design
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Solution Overview
Problem
Conventional tensioning apparatuses for flexible drive means, such as internal combustion engine drive chains, require complex structures and adaptations, leading to high production costs and a need for optimization to reduce costs and improve functionality.
Innovation Solution
The tensioning apparatus incorporates a spring section with a torsional area to connect clamping sections in a spring-resilient manner, reducing flexural loading and preventing plastic deformation, allowing for a reversible widening of the clamping area and increased material thickness for improved clamping functionality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a conventional locking mechanism with ring-shaped section is used, then the clamping effect can be improved by larger round wire diameters, but the ring-shaped section cannot be widened beyond a certain limit due to plastic deformation
Solution Approach 1:
The locking bracket is segmented into two clamping sections connected by a spring section, allowing independent movement and widening of the clamping sections without requiring the entire structure to be oversized
Solution Approach 2:
The spring section is designed with a torsional area that changes the mechanical properties from rigid to elastic, enabling reversible widening through torsional deformation rather than plastic bending
2Adaptability or versatility
If the ring-shaped section of the locking bracket is widened to allow greater adjustment range, then the adjustability is improved, but the round wire diameter must be reduced which weakens the clamping effect
Solution Approach 1:
The locking bracket is divided into clamping sections and a spring section, allowing the clamping sections to be optimized for strength while the spring section provides the widening function
Solution Approach 2:
The spring section uses torsional deformation instead of bending, changing the deformation mode to allow widening without compromising the structural integrity and clamping force
3Reliability
If a complex locking mechanism structure is used to achieve reliable function, then the reliability is improved, but the production cost and device complexity increase
Solution Approach 1:
The locking bracket integrates multiple functions (clamping, spring loading, widening, guiding) into a single component, eliminating the need for separate elements and simplifying the overall structure
Solution Approach 2:
The spring section with torsional area serves multiple purposes: connecting clamping sections, providing elastic force, enabling reversible widening, and guiding the adjustment movement
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
This design enhances the functional reliability and lifespan of the tensioning apparatus by reducing flexural loading, enabling a cost-effective production process with a simpler structure and assembly, while improving the clamping function for blocking retraction movements.
Implementation Method 1
the spring section includes at least one torsional area for connecting the clamping sections in spring-resilient manner
Implementation Method 2
the spring section includes at least one torsional area for connecting the clamping sections
Data Source
AI summary
A tensioning apparatus or device for a flexible driving means, particularly a drive chain for an internal combustion engine, comprises a housing, a tensioning piston movably guided in said housing and an adjusting or regulating means for gradually adjusting the working stroke of the tensioning piston. The adjusting means comprises a locking bracket and an appertaining locking profile at the tensioning piston, two arch-shaped clamping sections of said locking bracket being engageable with said locking profile, and a resilient spring portion with a torsional area combining the clamping sections in spring-resilient manner. In a preferred embodiment, the locking bracket comprises a U-shaped section with a portion angled towards the housing wall and forming the torsional area. The housing is further provided with a guide projection projecting from said housing wall for axially guiding said angled portion of said U-shaped section of said locking bracket in the working stroke of said tensioning piston in torsion-proof manner.