Industrial Truck Load Roller Carrier with Multi-Flange Pin Support
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Solution Overview
Problem
Conventional industrial trucks with large-diameter bearing and coupling pins are unable to reduce the height of the wheelarms to handle pallets with an entry height lower than standard euro pallets, limiting their ability to accommodate special pallets.
Innovation Solution
The load roller carriers feature additional bearing and coupling flanges, allowing the bearing and coupling pins to be mounted on multiple flanges, reducing their diameter and distributing forces effectively, enabling a lower wheelarm height by supporting the pins on more than two flanges, and incorporating a central web for further support and force distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If large-diameter bearing pins and coupling pins are used to ensure sufficient load-bearing capacity, then the strength and reliability are improved, but the wheelarm height cannot be reduced and the ability to handle special pallets is lost
Solution Approach 1:
The load roller carrier is divided into multiple bearing flanges (at least three flanges: two outer flanges and one central flange) instead of using a single bearing point. This segmentation distributes the load across multiple contact points, allowing the use of smaller-diameter pins while maintaining sufficient load-bearing capacity. The bearing pin is supported on multiple flanges, reducing the mechanical stress on each individual pin.
Solution Approach 2:
The solution transitions from a single-plane bearing arrangement to a multi-dimensional support structure by adding bearing flanges at different locations (outer and central flanges) on the load roller carrier. This multi-point support in multiple dimensions allows force distribution that reduces the required pin diameter while maintaining structural integrity and reducing wheelarm height.
2Adaptability or versatility
If the wheelarm height is reduced to handle special pallets with low entry height, then the adaptability is improved, but the load-bearing capacity and structural stability are compromised
Solution Approach 1:
The support structure is segmented into multiple bearing flanges (outer bearing flanges and central bearing flange) that distribute the load. This segmentation allows the wheelarm to be shorter while maintaining structural stability through multi-point support, enabling the handling of special pallets with low entry height without compromising reliability.
Solution Approach 2:
The bearing flanges are strategically positioned at different locations (outer and central positions) on the load roller carrier, creating local support zones that optimize both the reduced wheelarm height for adaptability and the load distribution for structural stability. Each flange location provides localized support that contributes to overall system reliability.
Data Source
AI summary
An industrial truck (1) has a drive section (2) and a movable load section (4). The load section (4) has at least one wheelarm (5) with at least one load roller (6) rotatably mounted in a load roller carrier (12) which is mounted by a swivel bearing (13) on the wheelarm (5). The swivel-bearing (13) is a bearing pin (20). A linkage (10) is connected with the load roller carrier (12) by a coupling pin (21). The load roller carrier (12) has two outer bearing levers (12a, 12b) with bearing flanges (32a, 32b) for mounting the bearing pin (20) and bearing flanges (33a, 33b) for mounting the coupling pin (21), and an additional web (30) located between the outer bearing levers (12a, 12b) and having a bearing flange (32c) for mounting the bearing pin (20) and/or a bearing flange (33c) for mounting the coupling pin (21).