Shifting Device Latching Mechanism for Harvesting Transmission
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Solution Overview
Problem
Existing shifting devices for harvesting machines require complex and costly components to handle high speeds, leading to increased wear and maintenance efforts, and often necessitate structural alterations for speed reduction, which is inefficient and time-consuming.
Innovation Solution
A shifting device with a latching mechanism using a spring-pretensioned setting pin and eccentric shaft, allowing the shift gear to be axially displaced and locked into multiple positions, enabling adjustable drive connections without the need for structural changes, thereby reducing high-speed impacts on components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the drive motor operates at high speeds to meet operational demands, then the chopping device can achieve higher cutting speeds, but the components such as seals, bearings, and lubricating systems experience increased wear and temperature, requiring more complex and costly designs
Solution Approach 1:
The patent implements a variable drive ratio transmission system that allows the chopping device speed to be dynamically adjusted relative to the drive motor speed. The transmission can switch between different gear ratios, enabling the chopping device to operate at reduced speeds when high motor speeds are required, thereby protecting components from excessive wear while maintaining operational flexibility.
Solution Approach 2:
The transmission system acts as an intermediary between the drive motor and the chopping device. It decouples the direct speed relationship, allowing the motor to operate at optimal speeds while the transmission adjusts the output speed to the chopping device, preventing direct transmission of harmful high-speed effects to the chopping components.
2Speed
If structural alterations are made to reduce speed, such as removing connecting pins or coupling means, then the speed can be reduced, but this requires significant installation and conversion effort, negatively impacting efficiency and time management
Solution Approach 1:
The transmission system provides dynamic speed adjustment through selectable gear ratios, allowing speed reduction to be achieved through operational changes rather than physical structural modifications. This eliminates the need for time-consuming installation and conversion efforts while maintaining the ability to reduce speed when needed.
Solution Approach 2:
The transmission system serves multiple functions: it provides speed reduction, enables optional uncoupling of the chopping device, and allows for different operational modes without requiring different physical configurations. This multi-functionality eliminates the need for structural alterations while achieving speed reduction goals.
3Adaptability or versatility
If a latching device with multiple latching positions is implemented, then the shift gear can be securely locked in various positions for flexible drive ratio adjustment, but the device complexity increases
Solution Approach 1:
The latching device is segmented into discrete latching positions corresponding to different drive ratios. Each position is independently latchable, providing flexible adjustment while keeping each individual latching mechanism simple. The segmentation allows for clear, distinct positions without requiring complex continuous control mechanisms.
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 solution allows for efficient adjustment of drive ratios and optional uncoupling of chopping devices from the drive motor, reducing wear and maintenance costs while simplifying operational procedures.
Implementation Method 1
a latching device is provided, the shift gear being axially displaceable thereby into a plurality of latching positions. The latching device comprises a spring-pretensioned setting pin
Implementation Method 2
a setting shaft which is rotatably mounted in the transmission shaft, by means of which setting shaft the setting pin is able to be brought out of an unlocked position into a locked position and vice-versa by rotating the setting shaft
Data Source
AI summary
A shifting device for a transmission is disclosed. The shifting device comprises a transmission shaft, a shift gear being mounted thereon, wherein the shift gear is configured with a connecting hub which is axially displaceable relative to the transmission shaft, wherein the connecting hub has an internal toothing in engagement with an external toothing of the transmission shaft, so that the shift gear is drive-connected to the transmission shaft in an axially displaceable manner therewith. A latching device is further provided, the shift gear being axially displaceable thereby into a plurality of latching positions. The latching device comprises a spring-pretensioned setting pin displaceably mounted radially to the transmission shaft and in engagement with a setting shaft rotatably mounted in the transmission shaft, such that the setting shaft and the setting pin can be brought out of an unlocked position into a locked position and vice-versa by rotating the setting shaft.