Rotary Harrow Input Gearbox Nested Shaft Design
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Solution Overview
Problem
Existing rotary harrows face challenges in integrating the input gear in a space-saving manner while ensuring effective initiation of the drive movement, leading to inefficiencies in the transmission of rotational force to the spur gears.
Innovation Solution
The design incorporates an input gear with a drive gear arranged on the output shaft in a rotationally fixed manner, a gear sleeve with a housing opening for engagement with spur gears, and a bearing system that includes a cylindrical roller bearing to securely mount the drive shaft, allowing for a compact and efficient transmission of rotational force.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the input gearbox is integrated into the drive unit of the rotary harrow, then the space utilization is improved and the structure is compacted, but the complexity of integrating the drive movement increases
Solution Approach 1:
The input gearbox is merged with the drive unit by integrating the output shaft of the input gearbox with the shaft of the first spur gear. The gearbox housing is positioned adjacent to the array of spur gears, creating a compact integrated assembly that reduces overall space requirements while maintaining functional independence of each component.
Solution Approach 2:
The output shaft of the input gearbox is inserted at least partially into the gearbox sleeve, creating a nested configuration. The drive gear is fixed on the output shaft and engages with the first spur gear through the gearbox housing, allowing compact nesting of transmission components within the drive unit structure.
2Reliability
If the output shaft is inserted into the gearbox sleeve with a lower bearing assembly occupying substantial space, then the support and stability are improved, but the available space for other components is reduced
Solution Approach 1:
The lower bearing assembly is positioned along the longitudinal axis of the output shaft within the gearbox sleeve, utilizing the axial dimension rather than expanding radially. This allows the bearing assembly to provide substantial support and stability while maintaining a compact cross-sectional footprint that preserves space for other components in the transverse direction.
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 enables a space-saving integration of the input gear within the rotary harrow, enhancing the initiation of the drive movement and ensuring efficient transmission of rotational force to the spur gears, thereby improving the overall operational efficiency of the rotary harrow.
Implementation Method 1
The lower bearing assembly can be formed by a cylindrical roller bearing
Implementation Method 2
a gear train that transmits drive rotation between the input and output shafts
Data Source
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AI summary
The invention relates to a rotary harrow with a gearbox housing (7); spur gears arranged side by side and in mesh within the gearbox housing (7), each mounted non-rotatably on an associated rotor shaft supported within the gearbox housing (7); and an input gearbox (6) associated with the spur gears for transmitting a drive force, comprising: an input shaft; an output shaft; a gear train arranged between the input shaft and the output shaft to transmit drive rotation; a drive gear (14) mounted non-rotatably on the output shaft; and a gearbox housing with a gearbox sleeve (13) into which the output shaft is inserted, at least partially. The drive gear (14) engages with one of the spur gears through a housing opening in the gearbox sleeve (13). Furthermore, an input gearbox for a rotary harrow is provided.