Roller Assembly With Independent Walking Beam Pivots
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Solution Overview
Problem
Existing roller assemblies are limited in accommodating variations in ground contours, particularly in the lateral direction, due to fixed pivot axes and complex mechanisms, which restrict their flexibility and adaptability during towing operations.
Innovation Solution
A roller assembly with a frame member and multiple walking beams, each with a horizontal pivot axis, supported by a mechanism allowing independent upward and downward deflections, and a hydraulic system for pressure distribution, enabling flexible movement in both longitudinal and lateral directions while being durable and cost-effective.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If fixed pivot axes are used in roller assemblies, then the structure is simple, but the ability to accommodate variations in ground contours is limited
Solution Approach 1:
The patent applies the dynamics principle by making the pivot axes movable rather than fixed. Each walking beam is supported on a support member that can move independently upward and downward, allowing the pivot axes to dynamically adjust their positions to accommodate variations in ground contours while maintaining a relatively simple overall structure
Solution Approach 2:
The patent segments the roller assembly into multiple independent walking beams, each with its own movable support member and pivot axis. This segmentation allows each segment to independently adapt to ground variations without requiring a complex centralized mechanism, achieving high adaptability through distributed simplicity
2Adaptability or versatility
If walking beams with fixed pivot axes are used, then the mechanism is simplified, but lateral accommodation of ground contours is prevented
Solution Approach 1:
The support members are designed to move dynamically in response to ground conditions, with each support member's pivot axis capable of independent vertical movement. This dynamic capability enables lateral accommodation of ground contours while keeping each individual support member's mechanism simple and straightforward
3Adaptability or versatility
If complex bearing and pivoting mechanisms are used, then relative movement between rollers is achieved, but durability and ease of maintenance are reduced
Solution Approach 1:
The patent divides the complex pivoting function into multiple simple, independent support members, each handling a portion of the movement requirement. This segmentation eliminates the need for complex interconnected bearing and pivoting mechanisms, resulting in a system with improved durability and ease of maintenance while achieving the necessary relative movement between rollers
Data Source
AI summary
A roller assembly is provided for connection behind a towing vehicle, for example a road grader vehicle. The roller assembly includes a frame supporting a plurality of walking beams extending generally in the forwarding working direction of the grader with packing rollers supported at each end thereof. Each walking beam is centrally pivoted on a support arm which is in turn pivoted on the frame to permit each pivot of each walking beam to be moveable generally upwardly and downwardly in relation to the pivots of the other walking beams. A common hydraulic circuit is arranged to provide a common downward force to the pivots of the walking beams. Pivoting movement of the walking beams accommodates for varying ground contours in the longitudinal direction while independent upward and downward movement of the walking beam pivots relative to one another permits accommodation of varying ground contours in the lateral direction.