Vehicle Driving-Force Distributor Tooth Strength via Inversion
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Solution Overview
Problem
The vehicle driving-force distributing device faces a challenge in enhancing the strength of first and second connecting/disconnecting teeth due to their limited diameter dimensions, which affects their durability and transmission efficiency.
Innovation Solution
The device incorporates a connecting/disconnecting sleeve with second teeth on the outer circumference and a synchronizing mechanism that reduces relative rotation between the first and second teeth, allowing for a larger diameter and improved strength, while maintaining a compact design and reducing gear noise and wear.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the second connecting/disconnecting teeth are disposed on the inner circumferential side of the connecting/disconnecting sleeve, then the device can be made more compact, but the tooth strength is reduced due to limited diameter dimensions
Solution Approach 1:
The patent inverts the conventional arrangement by disposing the second connecting/disconnecting teeth on the outer circumferential side of the connecting/disconnecting sleeve instead of the inner circumferential side. This inversion allows the teeth to have larger diameter dimensions, thereby improving tooth strength while still maintaining a compact overall device structure through the synchronizing mechanism.
2Strength
If the second connecting/disconnecting teeth are disposed on the outer circumferential side of the connecting/disconnecting sleeve, then the tooth strength is improved, but the device dimensions increase
Solution Approach 1:
The patent introduces a synchronizing mechanism as an intermediary component between the ring gear and the connecting/disconnecting sleeve. This synchronizing mechanism reduces the relative rotation between the first and second connecting/disconnecting teeth, allowing the teeth to be disposed on the outer circumferential side with larger diameter dimensions for improved strength, while the overall device dimensions are controlled through the compact design of the synchronizing mechanism.
3Device complexity
If the relative rotation between the first and second connecting/disconnecting teeth is not reduced, then the meshing operation is simpler, but the gear noise and wear increase
Solution Approach 1:
The synchronizing mechanism performs a preliminary action by reducing the relative rotation between the first and second connecting/disconnecting teeth before they engage in meshing. This preliminary synchronization minimizes impact and sliding during meshing, thereby reducing gear noise and wear, while the overall meshing operation remains relatively simple due to the straightforward design of the synchronizing mechanism.
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 configuration enhances the strength and durability of the teeth, reduces the device's dimensions, and minimizes power consumption by optimizing the tooth meshing and frictional engagement, thereby improving overall transmission efficiency and durability.
Implementation Method 1
a synchronizing mechanism disposed between the ring gear and the cylindrical member and reducing a relative rotation between the first connecting/disconnecting teeth and the second connecting/disconnecting teeth
Data Source
AI summary
A vehicle driving-force distributing device includes: first connecting/disconnecting teeth disposed on the inner circumferential side of the ring gear; a connecting/disconnecting mechanism that includes a cylindrical member and a connecting/disconnecting sleeve including second connecting/disconnecting teeth and spline-fitted movably in the rotation axis direction and relatively non-rotatably to the outer circumferential side of the shaft insertion portion and that connects and disconnects a power transmission path between the ring gear and the differential case by moving the connecting/disconnecting sleeve in the rotation axis direction between a meshing position at which the second connecting/disconnecting teeth are meshed with the first connecting/disconnecting teeth and a non-meshing position at which the second connecting/disconnecting teeth are not meshed with the first connecting/disconnecting teeth; and a synchronizing mechanism disposed between the ring gear and the cylindrical member and reducing a relative rotation between the first connecting/disconnecting teeth and the second connecting/disconnecting teeth.