Dual-Input Transmission Assembly With Freely Rotating Gear Wheels
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Solution Overview
Problem
Current transmission assemblies for vehicles face challenges in reducing wear and power losses, particularly in heavy-duty applications, where high-speed rotation of gear wheels leads to increased wear and inefficiencies.
Innovation Solution
The design incorporates axially offset gear wheels with some wheels freely rotatable, reducing wear and power losses by allowing lower speed rotation of key components and eliminating the need for certain clutch members and bearings, while maintaining functionality through strategically fixed and rotatable gear configurations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If gear wheels are rotationally fixed to shafts to ensure stable power transmission, then power transmission reliability is improved, but wear and power losses increase due to high-speed rotation
Solution Approach 1:
The patent applies the dynamics principle by making the first input shaft first gear wheel freely rotatable on the first input shaft instead of being rotationally fixed. This dynamic configuration allows the gear wheel to rotate at lower speeds when torque is transferred through the output shaft second gear wheel, thereby reducing wear and power losses while maintaining reliable power transmission through the engaged clutch members
2Adaptability or versatility
If clutch members are added to engage/disengage gear wheels for versatile gear selection, then adaptability is improved, but device complexity increases
Solution Approach 1:
The patent applies the extraction principle by removing the need for a clutch member on the first input shaft. The first input shaft first gear wheel is made freely rotatable and is always in mesh with the output shaft first gear wheel, eliminating the requirement for engagement/disengagement mechanisms on this shaft while still providing versatile gear selection through clutch members on the second input shaft
Data Source
AI summary
A transmission assembly for a vehicle includes a first input shaft, a second input shaft and a common output shaft, a first input shaft first gear wheel and a first input shaft second gear wheel arranged axially offset with respect to each other on the first input shaft, a second input shaft first gear wheel and a second input shaft second gear wheel arranged axially offset with respect to each other on the second input shaft, an output shaft first gear wheel and an output shaft second gear wheel arranged axially offset with respect to each other on the common output shaft, wherein each one of the first input shaft first gear wheel and the second input shaft first gear wheel is meshing with the output shaft first gear wheel.