Bearing Assembly for Air Transport Carriage Beam Transitions
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Solution Overview
Problem
Existing rail-changing systems for air transport systems face issues such as locking or abrupt jumps of wheels due to the need for precise tolerances and standard beam profiles, leading to instability and balance disruptions during direction changes.
Innovation Solution
A bearing assembly with a yoke-like configuration, featuring main wheels with auxiliary wheels and a cam system that allows for smooth transitions between beams without requiring high accuracy in tolerances, along with flexible guiding means and wedge elements to absorb irregularities, enabling stable and precise direction changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If passive rail systems with two wheels and a lower guiding element are used, then the structure is simpler, but the bearings must jump from one beam to another without a guide, increasing the risk of locking
Solution Approach 1:
The bearing assembly is divided into multiple wheel units (first pair of main wheels, second pair of main wheels, and auxiliary wheels) that can independently contact different beam segments. This segmentation allows each wheel pair to handle specific portions of the transition, eliminating the need for abrupt jumps and reducing locking risk while maintaining structural simplicity.
Solution Approach 2:
The lower guiding element acts as an intermediary component between the main wheels and the beam segments. It provides continuous guidance during the transition from one beam to another, mediating the movement and preventing direct, unguided jumps that could cause wheel locking.
2Strength
If the thickness of plates is increased to create a solid assembly, then the assembly is more robust, but the jump between beams becomes larger, multiplying the risk of locking the wheels
Solution Approach 1:
The bearing assembly uses multiple thinner plate segments instead of one thick plate. The first and second pairs of main wheels are mounted on separate plate segments that can flex independently, maintaining structural robustness while reducing the overall jump distance between beams to prevent wheel locking.
Solution Approach 2:
The plate segments are designed with flexible connections that allow dynamic adjustment during beam transitions. This flexibility enables the assembly to adapt to varying beam gaps without requiring excessive plate thickness, thereby maintaining robustness while minimizing the jump distance that could cause wheel locking.
3Ease of operation
If oscillating arms with horizontal rotational axis are used, then the system can change direction, but high accuracy in tolerances is required for the bearings to fit perfectly into guiding side channels
Solution Approach 1:
The bearing assembly incorporates spherical or curved contact surfaces in the wheel configurations and guiding elements. These curved surfaces provide self-aligning capabilities during direction changes, allowing the system to accommodate tolerance variations without requiring perfectly precise fits between bearings and guiding channels.
Solution Approach 2:
The system uses adjustable parameters in the wheel-rail contact geometry and guiding element dimensions. By optimizing these parameters, the design achieves effective direction changing with relaxed tolerance requirements, as the geometry compensates for manufacturing variations through inherent mechanical advantage and self-adjustment mechanisms.
4Ease of operation
If the cam rotates to change direction, then the bearing assembly can transition between beams, but the cam must rotate completely and precisely for the change to take place
Solution Approach 1:
The cam mechanism incorporates curved or spherical contact surfaces that provide self-aligning and self-correcting properties during rotation. This curvature allows the cam to guide the bearing assembly through beam transitions even with imperfect rotation, reducing the need for complete and precise cam rotation while maintaining reliable transition capability.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution ensures stable load support and smooth transitions between beams, reducing the risk of wheel locking and maintaining balance during direction changes, regardless of beam thickness or type, and allows for automated and predefined movement, facilitating precise guidance and reduced friction.
Implementation Method 1
The stop means comprise at least one rolling element, the rotational axis of which is vertical. This rolling element reduces friction with the parts that drive the change in direction.
Data Source
AI summary
A rail-changing system for air transport systems that comprises a bearing assembly and an arrangement of beams for changing direction, in which the bearing assembly is of the type that is linked to a carriage of an air transport system on beams, and comprises a frame linked to a pair of extensions defining a configuration similar to a yoke, each extension comprising a pair of main wheels with a common rotational axis arranged horizontally, and the main wheels being able to circulate on a beam; the bearing assembly also comprises at least one cam arranged on a rotating basis between the extensions, such that the rotational axis of the cam is arranged vertically, the arrangement of the beams for changing direction of a carriage with a bearing assembly and the beams being rails of the passive type.