Low floor bogie with unilaterally driven wheel set shaft

The low-floor engine suspension system addresses the challenge of minimizing height differences and reducing noise in low-floor vehicles by using a coaxial electrical drive arrangement with the wheel set axis, resulting in a lighter, less complex, and quieter vehicle design.

EP4122790B1Active Publication Date: 2025-03-19SIEMENS MOBILITY GMBH +1
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Patent Information

Application Number
EP2022174541
Authority / Receiving Office
EP · EP
Patent Type
Patents
Current Assignee / Owner
Priority Date
2021-07-22
Filing Date
2022-05-20
Publication Date
2025-03-19
Estimated Expiration
2042-05-20

AI Technical Summary

Technical Problem

Existing low-floor vehicles face challenges in minimizing height differences between the ground and the chassis, leading to increased complexity and noise in the passenger compartment due to the placement of drives away from the gait area.

Method used

A low-floor engine suspension system with at least two wheel set shafts, where the electrical drive is coaxially arranged with the wheel set axis and positioned one-sidedly outside the wheel set's free area, minimizing the number of drive components and maintaining a low weight.

Benefits of technology

This solution reduces the weight and manufacturing costs of low-floor vehicles, while also minimizing noise and vibrations in the passenger compartment, and allows for easier wheelbase dimensioning.

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Abstract

The invention relates to a vehicle (54a; 54b; 54c) with a low-floor traction chassis (10a; 10b; 10c) which has a wheelset shaft (12, 14) with a wheelset (16, 18) which is rotatably mounted about a wheelset axle (20, 22). Furthermore, the low-floor traction unit (10a; 10b; 10c) has an electric drive (24a, 26a; 24b, 26b; 24c, 26c) for driving the wheelset axle (12, 14), wherein a motor axle (28, 30) of the electric drive (24a, 26a; 24b, 26b; 24c, 26c) and the wheelset axle (20, 22) are arranged coaxially and the electric drive (24a, 26a; 24b, 26b; 24c, 26c) is arranged on one side in a region around a section of the wheelset axle (20, 22), which is outside a free area (32, 34) of the wheelset axle bounded by a wheelset (16, 18) connected to the wheelset axle (12, 14). (12, 14) lies.
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