Straddle Monorail Bogie Assembly High-Efficiency Traction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Straddle-type monorail vehicles have low energy utilization efficiency due to small reduction ratios in electric assemblies, leading to higher energy consumption and larger vehicle masses, which hinders energy conservation and environmental protection.
Innovation Solution
A bogie assembly with a compact structure integrating a traction motor, gear reducer, planetary wheel-side reducer, and brake, optimized for high energy efficiency, allowing for a low floor design and reduced weight, featuring a traction mechanism and suspension system for stable traction and shock absorption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a motor with low rotating speed is used due to small reduction ratio, then the electric assembly can be simpler, but the energy utilization efficiency is low
Solution Approach 1:
The patent combines the gear reducer and planetary wheel-side reducer into an integrated transmission system with a large overall reduction ratio. This merging of reduction stages allows the motor to operate at high rotating speed while achieving the required low output speed through the combined effect of both reducers, thereby improving energy utilization efficiency without significantly increasing electric assembly complexity.
Solution Approach 2:
The patent changes the reduction ratio parameter from small to large by integrating two reduction stages. This parameter change enables the motor to operate in a high-speed range where energy utilization efficiency is optimized, while the large overall reduction ratio still delivers the necessary torque at the wheel hub.
2Adaptability or versatility
If the electric assembly occupies large space, then more components can be accommodated, but low floor structure cannot be realized
Solution Approach 1:
The patent adopts a transverse arrangement of the traction motor and optimizes the spatial layout of the electric assembly components in three-dimensional space. By utilizing the vertical and lateral dimensions effectively, the design accommodates all necessary components (motor, gear reducer, planetary wheel-side reducer, brake) without increasing the longitudinal footprint, thereby enabling low floor structure while maintaining component accommodation capacity.
3Quantity of substance
If the mass of the whole vehicle is larger, then the vehicle can carry more load, but energy consumption is higher
Solution Approach 1:
The patent changes the reduction ratio parameter to a large value, which enables the motor to operate at high rotating speed with optimized energy efficiency. This high-speed operation reduces energy consumption while the maintained load capacity ensures the vehicle can still carry required loads, effectively decoupling the trade-off between mass and energy consumption.
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 bogie assembly achieves high energy efficiency, reduces vehicle weight, and enables a low floor structure, enhancing energy conservation and environmental protection while providing stable traction and improved shock absorption.
Implementation Method 1
a gear reducer, the traction motor being connected with an input shaft of the gear reducer
Implementation Method 2
an output shaft of the gear reducer being connected with an input end of the planetary wheel-side reducer
Implementation Method 3
a brake, the brake being disposed between the traction motor and the running wheel
Data Source
AI summary
The present disclosure provides a bogie assembly and a straddle-type monorail vehicle with the same. The bogie assembly comprises: a bogie frame; an electric assembly which is mounted on the bogie frame and comprises a traction motor, a gear reducer and a planetary wheel-side reducer, wherein the traction motor is connected with an input shaft of the gear reducer, and an output shaft of the gear reducer is connected with an input end of the planetary wheel-side reducer; and a running wheel which is mounted on the bogie frame, wherein an output end of the planetary wheel-side reducer is connected with a hub of the running wheel.