Composite Reduction Drive With Gear-Belt Torque Multiplication
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Solution Overview
Problem
Existing electric vehicle power systems face challenges in providing sufficient torque, especially for all-terrain vehicles, due to the limitations of direct motor-to-wheel shaft power transmission or single-stage speed reduction mechanisms.
Innovation Solution
A composite reduction driving mechanism is introduced, comprising a reduction gear set with two reduction gear pairs and a transmission band set, which connects the driven shaft of the reduction gear set to the wheel shaft, enabling two stages of speed reduction and enhancing torque transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If direct motor-to-wheel shaft power transmission is used, then the structure is simple, but the torque performance is insufficient
Solution Approach 1:
The transmission system is segmented into two independent reduction mechanisms: a first reduction mechanism with gear pairs and a second reduction mechanism with transmission belts. This segmentation allows each mechanism to contribute to torque multiplication independently, achieving high torque performance while maintaining reasonable structural complexity through modular design
2Device complexity
If single-stage speed reduction mechanism is used, then the structure is simple, but the torque output is insufficient for all-terrain vehicles
Solution Approach 1:
The patent merges two different reduction mechanisms (gear-based and belt-based) into a composite transmission system. The first reduction mechanism provides initial torque multiplication, while the second reduction mechanism further amplifies torque before delivering power to the wheel shaft. This combination enables the system to achieve high torque output suitable for all-terrain vehicle requirements
3Force
If two-stage speed reduction is implemented, then the torque performance is improved, but the device complexity increases
Solution Approach 1:
A intermediate shaft is introduced as a mediator between the two reduction mechanisms. The first reduction mechanism drives the intermediate shaft, which then drives the second reduction mechanism. This intermediary approach allows the two-stage reduction to be implemented while maintaining clear functional separation and manageable structural complexity
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 composite reduction driving mechanism achieves a stable and high-torque speed-reduction transmission performance, effectively addressing the torque deficiency in electric vehicle power systems, particularly for all-terrain vehicles.
Implementation Method 1
The reduction gear set comprises a first reduction gear pair and a second reduction gear pair. The first reduction gear pair is connected to the driving shaft of the electric motor. The second reduction gear pair is rotated with the first reduction gear pair and has a driven shaft.
Implementation Method 2
The transmission band set is connected between the reduction gear set and the wheel shaft, and comprises a first transmission wheel, a second transmission wheel and an annular transmission band. During a load changing of the electric vehicle, the transmission band set performs a damping effect between the reduction gear set, connected to the electric motor, and the wheel shaft.
Data Source
AI summary
A composite reduction driving mechanism is configured to be applied to an electrical power system of an electric vehicle and to connect between an electric motor of the electrical power system and a wheel shaft. The composite reduction driving mechanism comprises a reduction gear set and a transmission band set. The reduction gear set connects a driving shaft of the electric motor. The transmission band set connects between a driven shaft of the reduction gear set and a wheel shaft. Power outputted by the electric motor is transmitted to the wheel shaft through the composite reduction driving mechanism and through two times of speed reduction during transmission, thus providing a high-torque power performance to the wheel shaft.