Motor-Driven Bogie with Segmented Drive for Tram Corridor Access
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Solution Overview
Problem
Existing railway bogie designs for trams face challenges in integrating a motor into the structure without restricting access or seat placement and have complex mechanical drive systems.
Innovation Solution
A powered bogie design where the motor is mounted on the chassis, with front and rear reducing gears positioned between longitudinal planes midway between the wheels, allowing for a wide low corridor and simplified mechanical integration, and featuring primary suspension components placed inside the bogie and secondary suspension components outside the wheels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the motor is integrated into the body structure beyond the bogie region, then the motor can be positioned for drive transmission, but it prevents the provision of seats or access doors above the motor and restricts corridor width
Solution Approach 1:
The motor is segmented from the body structure and relocated to the bogie chassis, separating the drive system from the passenger compartment. This allows the body to have unrestricted access doors and seat placement above the motor position, while the motor remains integrated into the overall vehicle system through the bogie mounting.
2Productivity
If driving the two reducing gears in series is used, then the motor can drive both front and rear wheels, but the mechanical complexity increases
Solution Approach 1:
The drive transmission system is segmented into independent parallel paths: the motor drives a first reducing gear for the front wheels and a second reducing gear for the rear wheels simultaneously. This eliminates the need for series driving while maintaining the ability to drive both axles, reducing mechanical complexity while preserving productivity.
Solution Approach 2:
The transmission architecture transitions from a longitudinal series arrangement to a transverse parallel arrangement, where the motor positioned on the bogie chassis can simultaneously drive both reducing gears through independent transmission paths, simplifying the mechanical layout while maintaining drive efficiency.
3Area of stationary object
If the motor is mounted on the bogie chassis with reducing gears positioned between longitudinal planes midway between wheels, then a wide low corridor is enabled, but the transmission path becomes longer
Solution Approach 1:
The reducing gears are repositioned from traditional longitudinal arrangements to a transverse configuration between the longitudinal planes midway between the wheels. This dimensional repositioning creates lateral space for a wide low corridor while the motor, mounted on the bogie chassis, maintains efficient transmission paths to both reducing gears through the available space.
Data Source
AI summary
A powered bogie for a railway vehicle, including one or more motors mounted on the bogie chassis, the front and rear reducing gears being arranged between, on the one hand, a longitudinal plane midway between the two front wheels and midway between the two rear wheels and, on the other hand, a longitudinal plane passing through the front wheel and the rear wheel situated on the same, first transverse side of the bogie is provided.