Unidirectional Clutch Decoupling Device for Vibration Absorption
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Solution Overview
Problem
Existing unidirectional clutch decoupling devices for motor vehicle engines face challenges in efficiently absorbing vibrations from the belt wheel, leading to increased engine noise, vibration, and reduced component life, with existing solutions being complex and costly to manufacture.
Innovation Solution
A unidirectional clutch decoupling device comprising a friction spring, an outer ring, a shaft sleeve, and an elastic unit, where the elastic unit, such as a serpentine spring, is used to absorb vibrations by transferring torque between the outer ring and the shaft sleeve, with convex plates and cushion blocks optimizing deformation and vibration absorption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If friction springs and torsion springs are connected in series to absorb vibration, then vibration absorption capability is improved, but device complexity and manufacturing difficulty increase
Solution Approach 1:
The patent combines the friction spring and torsion spring into a single integrated friction torsion spring structure, eliminating the need for separate springs and complex series connections. This unified structure absorbs vibration through its dual-function design, reducing component count and assembly complexity while maintaining vibration absorption effectiveness.
Solution Approach 2:
The friction torsion spring serves multiple functions simultaneously: it provides friction-based vibration damping, torsional flexibility for torque transfer, and structural support. This multi-functional design eliminates the need for separate friction springs and torsion springs, simplifying the overall device structure.
2Reliability
If T wheel inner surface is milled with spiral stairs to fix torsion spring, then torsion spring fixation is achieved, but manufacturing efficiency decreases and cost increases
Solution Approach 1:
The patent divides the T wheel structure into functional segments with dedicated fixation features such as ribs, grooves, or stepped surfaces that naturally accommodate and secure the friction torsion spring. This segmentation approach provides reliable fixation without requiring complex spiral stair milling operations, thereby improving manufacturing efficiency.
Solution Approach 2:
The patent introduces intermediary structural elements such as fixation ribs, mounting grooves, or retaining features on the T wheel that act as mediators between the friction torsion spring and the wheel body. These intermediary features provide secure attachment points, ensuring reliable fixation while using simpler, more efficient manufacturing processes.
3Object-affected harmful factors
If unidirectional clutch decoupling device is added to reduce vibration, then engine vibration and noise are reduced, but device complexity increases
Solution Approach 1:
The unidirectional clutch function and vibration decoupling function are merged into a single integrated device. The friction torsion spring mechanism simultaneously provides torque transfer in one direction and vibration absorption, eliminating the need for separate decoupling devices and reducing overall system complexity.
Solution Approach 2:
The decoupling device is designed to perform multiple functions: unidirectional torque transmission, vibration absorption, and shock damping. This multi-functional design reduces the number of separate components needed in the belt drive system, simplifying the overall gear system structure while effectively reducing engine vibration and noise.
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 device effectively reduces and eliminates rotation vibrations, simplifies the manufacturing process, and extends the operational life by distributing stress evenly across metal bearings, resulting in a more reliable and cost-effective solution.
Implementation Method 1
the elastic unit reduces or eliminates rotation vibration of the outer ring and the shaft sleeve through deformation
Implementation Method 2
The friction spring is combined with the inner surface of the belt wheel in a rubbing mode
Data Source
AI summary
The patent application discloses a unidirectional clutch decoupling device for transferring torque between a belt wheel and a shaft. The unidirectional clutch decoupling device includes a friction spring, an outer ring, a shaft sleeve and an elastic unit. The friction spring is combined with the inner surface of the belt wheel in a rubbing mode. The outer ring is arranged in the space formed by the friction spring. The relative position of the outer ring and the friction spring is fixed. The shaft sleeve is used for accommodating the shaft, and the relative position of the shaft sleeve and the shaft is fixed. The elastic unit is located between the outer ring and the shaft sleeve and used for transferring torque of the outer ring to the shaft sleeve.