Laterally Accessible Cable Duct for Rail Vehicles
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Solution Overview
Problem
Existing solutions for routing cables in rail vehicles do not allow for easy assembly or access to the cable duct, making maintenance and repairs cumbersome.
Innovation Solution
A rail vehicle car design featuring a cable duct routed on the outside along the longitudinal beam with a cover that forms part of the outer paneling, allowing lateral access and easy installation, and using elongated holes for tolerance compensation, detachable fasteners for maintenance, and a unique cross-sectional shape to fit limited spaces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the cable duct is integrated into the underframe and routed centrally above the bogie or along the outer longitudinal beam, then the cable routing is structurally stable, but the installation and maintenance access becomes difficult
Solution Approach 1:
The cable duct is divided into a fixed support structure (integrated into the underframe) and a removable cover portion. The cover can be detached to provide access to cables while the support structure remains permanently mounted, thus maintaining structural stability while enabling easy installation and maintenance.
Solution Approach 2:
The cable duct transitions from a completely fixed structure to a dynamic system where the cover can be moved between closed (protective) and open (accessible) states. This allows the structure to adapt between providing structural stability and enabling access for installation and maintenance operations.
2Stability of the object's composition
If the cable duct is mounted from below the car body using a work frame, then the structural integration is achieved, but the assembly process becomes complex and time-consuming
Solution Approach 1:
The cable duct assembly is segmented into a support structure that integrates with the underframe and a separate duct body with cover. This allows the support structure to be pre-installed on the work frame for structural integration, while the duct body and cover can be assembled separately and attached more easily, reducing overall assembly complexity.
Solution Approach 2:
The support structure is prepared and integrated into the underframe in advance using the work frame, creating predetermined mounting points and alignment features. This preliminary structural integration simplifies the subsequent attachment of the cable duct body and cover, reducing the complexity of the final assembly steps.
3Quantity of substance
If the cable duct is designed with a large cross-section for cable accommodation, then the cable routing capacity is improved, but the space requirement increases
Solution Approach 1:
The cable duct utilizes the vertical dimension more effectively by routing along the outer longitudinal beam with optimized cross-sectional geometry. This allows a large effective cable accommodation capacity while minimizing the horizontal footprint, efficiently using available three-dimensional space in the underframe area.
Data Source
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AI summary
A rail vehicle car comprises a chassis that has at least one side sill (100) extending in the longitudinal direction (140) of the vehicle as well as at least two brackets (110) that are secured to the side sill (100). A cable duct (120) extending along the side sill (100) comprises a cable duct member (121) that is secured to the brackets (110) as well as a cover (122) which faces the exterior of the rail vehicle and laterally closes the cable duct (120). A cable duct for a rail vehicle car is also described.