Shared Input Gear Speed Reducer for High Ratio Compactness
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Traditional speed reducers with two independent annular input gears are complex, costly, voluminous, and have poor structural strength due to their increased number of components, making it difficult to achieve a high reduction ratio while minimizing structural elements and volume.
Innovation Solution
A speed reducer design featuring a shared input gear with an eccentric structure, where the input gear forms gear pairs with both the fixing gear and output gear, reducing the number of components and eliminating the need for fixing holes, resulting in a more compact and robust mechanism with a high reduction ratio.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If two independent annular input gears are used to achieve high reduction ratio, then the reduction ratio is improved, but the device complexity and volume increase
Solution Approach 1:
The patent merges two independent annular input gears into a single shared input gear that simultaneously engages with both the fixing gear and the output gear. This integration reduces the component count from two separate input gears to one, simplifying the overall structure while maintaining the high reduction ratio function through the shared gear's dual engagement capability.
Solution Approach 2:
The shared input gear serves multiple functions: it acts as the primary input element, engages with the fixing gear to establish the first gear pair, and simultaneously engages with the output gear to establish the second gear pair. This multi-functionality allows a single component to replace what traditionally required two separate components, reducing complexity while achieving the desired reduction ratio.
2Power
If two independent annular input gears are used to achieve high reduction ratio, then the reduction ratio is improved, but the volume of the speed reducer increases
Solution Approach 1:
By combining two separate input gears into one shared input gear, the overall volume required for the gear assembly is reduced. The shared gear occupies space that would have been occupied by two separate gears, eliminating redundant material and reducing the total volume of the speed reducer while maintaining the high reduction ratio capability.
3Power
If two independent annular input gears are used to achieve high reduction ratio, then the reduction ratio is improved, but the structural strength deteriorates
Solution Approach 1:
The shared input gear creates a more robust structural configuration where a single gear component distributes loads across two engagement points (with the fixing gear and output gear). This eliminates the need for multiple separate input gears and their associated mounting structures, resulting in improved structural strength and rigidity.
4Power
If traditional two-input-gear design is used, then high reduction ratio is achieved, but the number of components and cost increase
Solution Approach 1:
The patent reduces the component quantity by merging two input gears into one shared input gear, directly decreasing the total number of parts that need to be manufactured, assembled, and maintained. This consolidation lowers material consumption and assembly complexity while preserving the high reduction ratio function.
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 shared input gear design achieves a high reduction ratio while reducing the number of components, cost, and volume, enhancing structural strength and simplifying machining, thus overcoming the limitations of traditional speed reducers.
Implementation Method 1
the input gear is rotated with the input shaft and eccentrically rotated about an axel center of the input shaft
Implementation Method 2
the first teeth are pushed against the corresponding third teeth so that the output gear is correspondingly rotated
Data Source
AI summary
A speed reducer includes an input shaft, an input gear, a fixing gear and an output gear. The input shaft includes an eccentric structure. The input gear is disposed on the eccentric structure and includes first teeth of which each with a first contact portion and a second contact portion. The fixing gear and the output gear are disposed corresponding to the input gear, wherein the fixing gear includes second teeth, and the second teeth are in contact with the first contact portions, wherein the output gear includes third teeth, and the third teeth are in contact with the second contact portions. A first tooth number difference between the first teeth and the second teeth is different from a second tooth number difference between the first teeth and the third teeth.