Locomotive Bogie Traction Rod Routing for Central Buffer Clearance
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Solution Overview
Problem
Existing rail vehicle designs face challenges with complex and space-constrained installations of push/pull rods, particularly in vehicles with central buffer couplings, leading to difficulties in assembly and maintenance.
Innovation Solution
The use of triangular articulated parts for attaching push/pull rods to the bogie via a head carrier, allowing for a compact design and simplified assembly by eliminating the need for additional cross members and enabling the rods to be routed past central components, with a configuration that reduces straightening force and increases tractive force.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If push/pull rods are articulated to the car body in the central area, then the transmission of longitudinal forces is achieved, but the installation of other components such as tank containers, underfloor transformers becomes more difficult
Solution Approach 1:
The push/pull rods are articulated to the head carrier in the longitudinal direction rather than in the central area, utilizing the longitudinal dimension of the bogie structure. This dimensional shift moves the articulation points to the front and rear of the bogie, opening up the central area for other components while maintaining force transmission functionality
2Ease of manufacture
If push/pull rods are arranged symmetrically to the transverse center, then the assembly is simplified, but the straightening force is reduced which increases tractive force
Solution Approach 1:
The push/pull rods are positioned asymmetrically relative to the wheel axles, with the outer rods being longer than the inner rods. This asymmetric arrangement creates a natural spreading force during cornering that reduces the straightening force requirement, thereby increasing the available tractive force while maintaining assembly simplicity through symmetric attachment points
3Ease of operation
If push/pull rods are guided past central buffer coupling with springs, then the rods can be routed without interference, but the installation space is constrained
Solution Approach 1:
The push/pull rods are routed through the longitudinal space of the bogie structure, utilizing the existing spatial envelope defined by the head carrier and wheel axles. The rods are positioned to pass alongside the central buffer coupling springs rather than through them, nesting the force transmission path within the existing bogie geometry without requiring additional installation space
Data Source
Figure 1
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Figure 4~5
AI summary
The invention relates to a rail vehicle (1) comprising a bogie (2) that comprises at least one wheel set with an axle (13) and two wheels (3), a superstructure (3) that is supported on the bogie (2) and a traction/pressure rod (4) for transmitting longitudinal forces and that is linked to the bogie (2) and to a first side linking (8) of the superstructure (3). The traction/pressure rod (4) is secured to the bogie (2) in the longitudinal direction between the centre of the bogie (2) and the front side of the linking (8). The aim of the invention is to produce a traction/pressure rod (4) that is simple and flexible to produce and a second traction/pressure rod (4) that is linked to the front side of the linking (8) is provided. The traction/pressure rods (4) are secured to a head support (5) of the bogie (2) and the traction/pressure rods (4) are disposed in the transversal direction symmetrically to the transverse centre of the bogie (2).