Gearing Assembly Axial Length Reduction via Merged Shifting
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Solution Overview
Problem
Existing transmission arrangements for agricultural vehicles, such as tractors and harvesters, face challenges in achieving a compact design due to the axial length requirements of reduction stages and the need for separate switching devices, making it difficult to integrate with dual clutch transmissions and range shift transmissions within the vehicle's frame.
Innovation Solution
The transmission arrangement integrates the reduction stage with the group shift transmission by sharing a switching device, allowing power flow to bypass the reduction stage in certain positions, thereby reducing the overall axial length and eliminating the need for a separate switching device for the reduction stage, while maintaining modularity and allowing for easy expansion or retrofitting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a separate switching device is provided for the reduction stage, then the reduction stage can be independently controlled, but the axial length of the transmission arrangement increases
Solution Approach 1:
The patent merges the switching device of the reduction stage with the switching device of the range shift transmission by integrating the shifting element into the range shift transmission structure. This allows the same switching element to control both the range shift transmission and the reduction stage, thereby eliminating the need for a separate switching device and reducing the overall axial length of the transmission arrangement.
Solution Approach 2:
The shifting element of the range shift transmission is designed to perform multiple functions: it controls the gear shifting in the range shift transmission and simultaneously controls the engagement/disengagement of the reduction stage. This multi-functionality allows a single component to manage multiple transmission functions, reducing the number of separate components needed and thereby reducing axial length.
2Ease of operation
If two separate switching devices are used (one for reduction stage, one for range shift transmission), then each transmission function can be independently controlled, but the device complexity increases
Solution Approach 1:
The patent combines two separate switching devices into a single integrated switching mechanism. The shifting element of the range shift transmission is designed to simultaneously control both the range shift transmission and the reduction stage, reducing the number of separate switching devices from two to one while maintaining independent control capability through the integrated design.
Solution Approach 2:
The single switching element is designed with multi-functionality to control multiple transmission functions. It can selectively engage or disengage the reduction stage while also controlling the range shift transmission, allowing independent control of transmission functions through a unified control mechanism rather than separate devices.
3Length of moving object
If the reduction stage is integrated with the range shift transmission, then the axial length is reduced, but the manufacturing complexity increases
Solution Approach 1:
The integrated transmission arrangement is designed with modular segmentation, where the reduction stage and range shift transmission are integrated but maintain distinct functional modules. The shifting element is designed as a separate component that can be manufactured independently and then assembled into the integrated structure, reducing manufacturing complexity by allowing separate fabrication of components followed by assembly.
Solution Approach 2:
The shifting element is designed as a universal component that performs multiple functions within the integrated transmission. By creating a multi-functional component that can be manufactured as a single piece or assembled from standard components, the patent reduces the number of separate parts needed, thereby simplifying the overall manufacturing process despite the integrated design.
Data Source
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AI summary
The invention relates to a gearing assembly (10), comprising a reduction stage (12) having a drive element (14) for driving the gearing assembly (10) about an axis of rotation D, an output shaft (16), on which a gear (18) is rotatably arranged, a shifting device (20), which has a shifting element (22) for assuming several shifting positions, wherein in a first shifting position the shifting element (22) connects the output shaft (16) to the drive element (14) in a driving manner, the reduction stage (12) being connected therebetween.