Belt Stage Drive Train for Forage Wagons
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Solution Overview
Problem
Agricultural harvesting machines have complex and costly mechanical drive trains with many lubrication points and bearings that are difficult to maintain, and require complex clutch systems for managing the simultaneous operation of different working units, leading to inefficiencies and high production costs.
Innovation Solution
A central belt stage is introduced to simplify the drive train by bridging the central drive element to the sides of the machine, eliminating the need for angular or T-gears and allowing for easy switching of working units, with a belt tensioner system that can be controlled to prevent overload and decouple the drive train from the tractor PTO shaft.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If a mechanical drive train with gear stages is used to guide the drive train from the central drive element to the side of the harvesting machine, then the power transmission is achieved, but the device complexity increases with many lubrication points and bearings that are difficult to reach
Solution Approach 1:
The patent extracts the complex gear stages (angular gears, T-gears, bevel gears) from the drive train and replaces them with a belt stage. This removes the disturbing complex mechanical elements while retaining the essential power transmission function, thereby reducing device complexity and improving maintainability.
Solution Approach 2:
The patent replaces the traditional mechanical gear-based drive train with a belt-driven system. This substitution eliminates the need for multiple gear stages, reducing the number of lubrication points and bearings, and simplifying the overall mechanical system while maintaining power transmission capability.
2Adaptability or versatility
If multiple working units are driven through complex clutch systems, then the simultaneous operation is controlled, but the ease of operation decreases and production costs increase
Solution Approach 1:
The belt stage serves as a universal coupling mechanism that can independently engage or disengage different working units through selective belt tensioning. This multi-functional design allows flexible operation of multiple working units without requiring complex clutch systems, improving ease of operation while maintaining adaptability.
3Reliability
If form-fitting clutches are used for coupling and decoupling working units, then the connection is secure, but the ease of operation worsens as the tractor PTO must be shut down for shifting
Solution Approach 1:
The patent employs a dynamic belt tensioning system that allows the belt stage to be selectively engaged or disengaged while the tractor PTO remains running. The adjustable belt tensioner enables form-fitting connection when engaged and easy decoupling when disengaged, eliminating the need to shut down the PTO for clutch shifting operations.
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 design results in a cost-effective, easy-to-maintain drive train with fewer parts, enabling efficient power transmission to multiple working units and preventing overloading, while allowing for convenient switching and overload protection without shutting down the tractor PTO.
Implementation Method 1
a belt stage (17) which extends transversely to the direction of travel and transversely to the articulated shaft (15) that can be coupled to the tractor from the aforementioned central drive element (16) on the input side to a transmission input element (20) of a transmission (21) arranged laterally on the harvesting machine (1)
Implementation Method 2
A belt tensioner system that can be controlled to prevent overload and decouple the drive train from the tractor PTO shaft
Data Source
Figure 1
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AI summary
The present invention relates to an agricultural harvesting machine, in particular a forage wagon, with at least one working unit that can be driven by a tractor via a drive train, wherein the drive train comprises a driveshaft that can be coupled to the tractor and drives an input-side, central drive element of the drive train, as well as at least one belt stage. According to the invention, the belt stage extends transversely to the direction of travel and transversely to the driveshaft that can be coupled to the tractor from the aforementioned input-side central drive element to a transmission input element of a transmission arranged laterally on the harvesting machine.