Resilient Gear Connection for Smooth Meshing
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Solution Overview
Problem
In gear transmission devices, the fixed connection between the driving gear and driving shaft often leads to tooth interference and damage when engaging with driven gears, as the driving gear cannot rotate relative to the shaft, causing teeth to strike and potentially get damaged.
Innovation Solution
A resilient connection is established between the driving gear and shaft coupling using a pair of bent, cylindrical helical springs, allowing the driving gear to rotate a tiny angle relative to the shaft coupling and engage with the driven gear smoothly, preventing tooth strikes by generating a resisting force that compensates for the elasticity of the springs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the driving gear is fixed to the driving shaft, then the driving gear cannot rotate relative to the driving shaft, but this causes tooth interference and damage when engaging with driven gears
Solution Approach 1:
The patent transforms the static fixed connection between the driving gear and driving shaft into a dynamic resilient connection. The driving gear is connected to the driving shaft through a resilient mechanism (such as a spring) that allows the driving gear to rotate a small angle relative to the driving shaft during engagement, enabling the gear teeth to mesh smoothly without interference while maintaining overall structural integrity.
Solution Approach 2:
The patent changes the connection parameter from rigid (fixed) to resilient (flexible). By introducing a resilient mechanism with controlled elasticity, the connection allows for small angular displacements during gear engagement, transforming the interaction from hard contact with interference to smooth meshing with tooth clearance adjustment.
2Ease of manufacture
If the driving gear is fixed to the driving shaft, then the structure is simple, but the teeth of the driving gear strike against the teeth of the driven gear causing damage
Solution Approach 1:
The patent introduces a resilient mechanism as an intermediary element between the driving gear and the driving shaft. This intermediary component absorbs the harmful tooth strike forces by allowing controlled angular rotation, converting the harmful direct impact into a buffered interaction that protects the gear teeth from damage while still transmitting the driving force effectively.
Solution Approach 2:
The resilient mechanism provides beforehand cushioning by being pre-installed between the driving gear and driving shaft with controlled elasticity. This cushioning effect is active before the tooth strike occurs, preventing the harmful impact from reaching the gear teeth by allowing the driving gear to rotate slightly and absorb the shock during engagement.
3Reliability
If the driving gear can rotate relative to the shaft coupling, then tooth interference is prevented, but the radial positioning stability may be compromised
Solution Approach 1:
The patent carefully controls the parameters of the resilient mechanism to achieve optimal performance. The elasticity of the resilient mechanism is designed to allow only small angular rotations (typically less than a degree) during engagement, which is sufficient to prevent tooth interference but small enough to maintain radial positioning stability. The resilient mechanism acts as a controlled compliant element rather than a free-floating connector.
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 solution enables the driving gear to mesh with the driven gear without damaging the teeth, ensuring a smooth engagement and reducing the risk of gear damage by allowing the driving gear to rotate relative to the shaft coupling, maintaining stable radial positioning and consistent rotating gaps.
Implementation Method 1
a resilient mechanism (40) urged between the shaft coupling (30) and the driving gear (20)... allowing the driving gear (20) to rotate a tiny angle relative to the shaft coupling (30)... generating a resisting force that compensates for the elasticity of the springs
Data Source
AI summary
An exemplary gear transmission device includes a driving assembly including a driving shaft, a shaft coupling, a circular driving gear, a resilient mechanism and a driven gear engaging with the driving gear. The shaft coupling is fixed to the driving shaft and rotatable in unison with rotation of the driving shaft. The circular driving gear substantially surrounds and is operatively coupled to the shaft coupling and rotatable under urging of the shaft coupling. The resilient mechanism is held between the driving gear and the shaft coupling and is elastically deformable in circumferential directions of the shaft coupling. When the driving gear moves axially and collides with the driven gear without meshing with the driven gear, the driving gear rotates slightly relative to the shaft coupling thereby elastically deforming the resilient mechanism and the driving gear reaches a position where it can mesh with the driven gear.