Cam Wheel-Change Assembly for Low-Loss Load Handling Robots
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Solution Overview
Problem
Existing robotic load-handling devices require robust, reliable, and cost-effective direction-change mechanisms that can withstand repeated use and support the weight of the device and containers, while also being easy to assemble and maintain, and made from recyclable materials.
Innovation Solution
A lightweight load handling device with a cam mechanism-based direction-change assembly that allows independent engagement and disengagement of wheels with tracks, featuring a compact design to minimize mechanical losses and maximize stability, and the use of recyclable materials for environmental friendliness and cost-effectiveness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a robust and reliable direction-change mechanism is used to support the weight of the load-handling device and containers, then the reliability and strength are improved, but the weight and device complexity increase
Solution Approach 1:
The direction-change mechanism is divided into separate functional components: a first direction-change mechanism for raising/lowering the first set of wheels, and a second direction-change mechanism for raising/lowering the second set of wheels. This segmentation allows each mechanism to be optimized independently, reducing overall weight while maintaining reliability through specialized design for each function.
Solution Approach 2:
The mechanism uses dynamic wheel engagement where the first set of wheels can be raised while the second set is lowered, and vice versa. This dynamic switching capability allows the system to maintain reliability by ensuring proper wheel-track engagement while reducing the need for overly robust static support structures, thereby reducing weight.
2Reliability
If a complex direction-change mechanism is used to enable precise wheel engagement and disengagement, then the reliability is improved, but the ease of manufacture and assembly deteriorates
Solution Approach 1:
The direction-change mechanism is divided into separate functional components: a first direction-change mechanism for raising/lowering the first set of wheels, and a second direction-change mechanism for raising/lowering the second set of wheels. This segmentation allows each mechanism to be manufactured and assembled independently using standardized procedures, improving ease of manufacture while maintaining reliable wheel engagement through dedicated design for each function.
Solution Approach 2:
Each direction-change mechanism is designed to perform multiple functions: engaging/disengaging wheels with tracks, supporting device weight, and enabling direction changes. This multi-functionality reduces the need for additional specialized components, simplifying manufacture and assembly while ensuring reliable wheel engagement through integrated design.
3Loss of energy
If the direction-change assembly is positioned closer to the wheels to minimize mechanical losses, then the efficiency is improved, but the device complexity increases
Solution Approach 1:
The direction-change assembly is segmented into localized units positioned near each wheel set, with the first direction-change mechanism close to the first wheels and the second mechanism close to the second wheels. This reduces the length of mechanical linkages and minimizes energy losses from friction and deformation, while the modular segmented structure keeps overall device complexity manageable through standardized repeated units.
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 cam mechanism enables smooth and efficient direction changes with reduced mechanical losses, improved stability, and lower production costs, while being easy to assemble and maintain, thus enhancing the reliability and efficiency of the load handling device.
Implementation Method 1
The cam mechanism comprises: a traveller; a fixed brace, wherein the traveller is arranged to move relative to the fixed brace under an applied horizontal force; a cam; and a follower, wherein the follower is engageable with the cam to convert movement of the traveller to a vertical movement
Data Source
AI summary
A load handling device, method and kit of parts for a load handling device are disclosed. The load handling device includes a skeleton having a frame defining a volume having an upper portion, a lower portion, and a middle halo; a first set of wheels arranged on the lower part of the skeleton and a second set of wheels arranged on the lower part of the skeleton; and a direction-change assembly arranged to raise or lower the first set of wheels with respect to the skeleton, and or lower or raise the second set of wheels with respect to the skeleton to engage and disengage the first and second sets of wheels with parallel tracks, the direction-change assembly being located between the middle halo and the first set of wheels and or the second set of wheels, and wherein the direction-change assembly includes a cam mechanism.