Parallel-Shaft Manual Transmission for More Compact Gear Variants
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Solution Overview
Problem
Existing manual transmissions for agricultural machinery lack the ability to provide a high number of gear variants while maintaining a compact size and versatility for various applications.
Innovation Solution
A manual transmission design featuring a first and second shaft with multiple switching units, where each switching unit on the second shaft can be switched with all units on the first shaft, allowing for torque transmission through a coaxial shaft section and switching elements like clutches, enabling efficient gear shifting with minimal translation interventions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a large number of gear variants are provided, then the transmission can be used for a wide range of applications, but the size and complexity of the transmission increases
Solution Approach 1:
The transmission is divided into two independent shafts (first shaft with switching units I-IV, second shaft with switching units A-D), each capable of operating autonomously. This segmentation allows the system to achieve multiple gear variants through combinations of switching units on both shafts without proportionally increasing the size of each individual component
Solution Approach 2:
Each shaft is designed with multiple switching units that can function independently or in combination with the other shaft. The first shaft can operate alone to provide certain gear variants, the second shaft can operate alone to provide other gear variants, and both can work together to provide the full range of gear variants, making each shaft a multi-functional component
2Adaptability or versatility
If more switching units are added to increase gear variants, then versatility improves, but the transmission becomes less compact
Solution Approach 1:
The transmission design transitions from a single-shaft configuration to a two-shaft parallel configuration, utilizing a different spatial dimension (parallel arrangement) to accommodate multiple switching units. This dimensional change allows the system to achieve more gear variants without simply extending the length or radius of a single shaft, thereby maintaining compactness
3Adaptability or versatility
If gear shifting requires multiple intervention steps, then more gear variants can be achieved, but efficiency losses increase
Solution Approach 1:
Both shafts are pre-equipped with multiple switching units that can be independently activated. This preliminary preparation allows the transmission to shift between gear variants by simply engaging or disengaging pre-positioned switching units, rather than requiring multiple sequential intervention steps. The switching units are already in place and ready to be activated, minimizing the time and energy required for gear shifting
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
This configuration allows for a compact, versatile transmission with a high number of gear variants, reducing efficiency losses and enabling seamless torque transmission across a wide range of applications, including agricultural machinery.
Implementation Method 1
torque can be transmitted from the first shaft to the second shaft, and then transmitted back to the first shaft via the further switching unit of the second shaft, and from there via the second shaft to the drive
Data Source
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AI summary
Gearbox with a first shaft (51) and a second shaft (61) arranged parallel to it, wherein a gear group (50) is arranged at least partially on the first shaft (51) and a range group (60) is arranged at least partially on the second shaft (61), wherein the gear group (50) has at least two gear units (I, II, III, IV, V) and the range group (60) has at least three range units (A, B, C, D).