Cycloidal Wheel Drive for Granule Conveyors
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Solution Overview
Problem
Traditional wheel and drive assemblies for granule conveyors, such as bin sweep systems, are inefficient, have lower power capacity, and are not sealed, leading to inefficiencies and reduced performance.
Innovation Solution
A cycloidal gear assembly with an input shaft and a driven ring gear, featuring a movable drive gear for cycloidal movement within the ring gear, is integrated within a wheel assembly, providing a sealed and compact design that reduces speed while increasing torque, and is lubricated internally to enhance efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If conventional drive mechanisms (chain drives, belt drives, gear drives) are used to transmit power from the engine to the drive wheels, then power transmission is achieved, but mechanical losses increase and reliability decreases due to multiple moving parts and maintenance requirements
Solution Approach 1:
The patent merges the engine crankshaft directly with the drive wheel by mounting the crankshaft at the center of the drive wheel, eliminating intermediate transmission components. This direct coupling combines the power source and drive mechanism into a single integrated unit, reducing mechanical losses and simplifying the overall drive system architecture.
Solution Approach 2:
The patent extracts and eliminates intermediate transmission elements (chains, belts, gears) from the power transmission path. By removing these intermediary components and establishing direct contact between the crankshaft and drive wheel, the system achieves more efficient power transmission with fewer failure points.
2Reliability
If conventional drive mechanisms with multiple moving parts are used, then power transmission is achieved, but reliability decreases due to increased maintenance requirements and potential failure points
Solution Approach 1:
By merging the crankshaft and drive wheel into a directly coupled system, the patent reduces the number of moving parts that can fail. The elimination of chains, belts, and gears removes multiple potential failure points, thereby improving overall system reliability.
Solution Approach 2:
The patent extracts unnecessary intermediate components from the drive system. By removing elements that add complexity and potential failure points without contributing essential function, the system achieves higher reliability through simplification.
3Loss of energy
If a direct contact drive system is used between the engine and drive wheels, then mechanical losses are reduced, but the system requires a specific geometric configuration (cycloidal geometry) that increases manufacturing complexity
Solution Approach 1:
The patent employs cycloidal geometry for the drive wheel and corresponding geometry for the crankshaft throw. This curved geometric configuration enables efficient direct contact power transmission by ensuring continuous surface contact between the crankshaft and drive wheel, optimizing mechanical advantage while maintaining manufacturability through standardized cycloidal forms.
4Productivity
If the crankshaft is mounted at the center of the drive wheel with direct contact, then power transmission efficiency increases, but the system requires precise geometric alignment and specific throw configurations that complicate the design
Solution Approach 1:
The cycloidal geometric configuration enables the crankshaft throw to maintain continuous contact with the drive wheel surface throughout rotation. This curved geometry translates rotational motion efficiently while accommodating the necessary throw variations, achieving high power transmission efficiency without requiring overly complex alignment mechanisms.
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 cycloidal gear assembly effectively reduces speed and increases torque, providing a more efficient and compact wheel drive system that preserves the direction of rotation, improving the performance and efficiency of granule conveyor systems.
Implementation Method 1
an intermediate gear structure for converting the rotational input from the input shaft to the rotational output of the ring gear, the intermediate gear structure including a movable drive gear configured for cycloidal movement within the ring gear
Implementation Method 2
a lubricant for lubricating the drive assembly, the lubricant being disposed substantially within the receptacle
Data Source
Figure 1A~1D
Figure 2~3
Figure 4
AI summary
A wheel assembly and a bin sweep system. The system may include a sweep auger for moving granules, and a wheel assembly including a rim and a tire disposed on the rim, the rim defining an interior radially inward of an inner circumference of the rim, and a cycloidal drive disposed in the interior of the rim. The cycloidal drive may include an input shaft, a drive gear having first gearing features and being eccentrically mounted on the input shaft, a stationary drive plate, and second gearing features coupled to the rim, the first gearing features engaging the second gearing features to drive the rim and wheel at a reduced speed relative to the input shaft.