Eccentric Bogie Axle Geometry for Balanced Wheel Loads
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Solution Overview
Problem
Conventional bogie axles experience a rising effect during travel, leading to uneven ground pressure, increased load on the rear wheel, and traction problems, especially in vehicles with a preferred traveling direction.
Innovation Solution
The bogie axle is designed with an eccentric mounting geometry, where the axle rocker's geometry is optimized according to the formula 0.05≤eR(1-iBBt)+a=FTFG≤0.4, to balance the tangential and radial wheel loads, thereby compensating for the rising effect.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If conventional bogie axle geometry is used, then the structure is simple and symmetric, but the rising effect causes uneven ground pressure and increased rear wheel load
Solution Approach 1:
The patent applies asymmetry by designing the axle rocker with an eccentric geometry where the rotational axis is offset from the centerline connecting the two hubs. This asymmetric configuration creates a mechanical lever effect that dynamically redistributes wheel loads during travel, compensating for the rising effect and achieving more uniform ground pressure between front and rear wheels without requiring additional active control systems
2Ease of operation
If additional components are added to compensate for rising effect, then wheel load distribution improves, but installation space requirement increases
Solution Approach 1:
The patent merges the load compensation function directly into the axle rocker structure itself by implementing eccentric geometry in the basic component. This integration eliminates the need for separate compensation mechanisms or additional installation space, as the asymmetric design inherently provides the load distribution benefit while maintaining a compact footprint suitable for standard vehicle configurations
3Ease of operation
If additional drive components are added to compensate for rising effect, then travelling characteristics improve, but drive efficiency decreases
Solution Approach 1:
The patent implements self-service by allowing the eccentric axle rocker geometry to automatically compensate for the rising effect through its inherent mechanical design. The asymmetric configuration passively adapts to travel conditions and dynamically balances wheel loads without requiring active control systems, additional drive components, or external energy input, thereby maintaining high drive efficiency while improving travelling characteristics
Data Source
AI summary
The invention relates to a bogie axle (10) for a vehicle (12) with a preferred travelling direction (V). The bogie axle (10) comprises at least one axle rocker (14) which has, as output, two hubs (16) which are arranged spaced apart for the arrangement of a front wheel (18) and a rear wheel (18), and which has an eccentric axle rocker mounting (20) which is arranged between the hubs (16) for pivotable mounting of the axle rocker (14) on an axle carrier, wherein the axle rocker mounting (20) has, as input, an input shaft (22) which, in order to drive the front wheel (18) and the rear wheel (18), is coupled thereto via at least one transmission (24). A geometry of the at least one axle rocker (14) corresponds to formula (I): in which e denotes an eccentricity of a rotational axis (D) of the axle rocker mounting (20) in the preferred travelling direction (V) starting from a centre axis (M) which is arranged between the hubs (16). The invention further relates to a vehicle (12) with a bogie axle (10) of this type.0.05≤eR(1-iBBt)+a=FTFG≤0.4(I)