Armrest-Mounted Secondary Steering for Ergonomic Field Operation
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Solution Overview
Problem
Operating an agricultural machine exclusively with a steering wheel on a steering column is unergonomic, leading to operator fatigue and limited steering speeds due to high steering forces, as it requires the operator to sit bent forward and use one hand for steering, thereby not utilizing comfort features of the driver's seat effectively.
Innovation Solution
The introduction of a secondary steering device on a further armrest articulated on the driver's seat, which can be used to deactivate the primary steering device, allowing the operator to steer with reduced fatigue, especially during field travel, by enabling the use of both arms for steering and improving ergonomics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a steering wheel on a steering column is used for steering, then the work machine can be steered, but the operator experiences fatigue and limited steering speeds due to high steering forces and must sit bent forward
Solution Approach 1:
The steering function is segmented into two separate steering devices: a primary steering device (steering wheel on steering column) and a secondary steering device (joystick on articulated armrest). This allows the operator to choose between different steering configurations, using the secondary device with both hands for reduced steering forces during field travel, while the primary device remains available for road travel
Solution Approach 2:
The secondary steering device is positioned on an articulated armrest that can be adjusted in multiple dimensions (height, angle, position) relative to the driver's seat. This spatial repositioning allows the operator to maintain an upright seating position while operating the joystick, eliminating the need to sit bent forward and enabling use of both hands for steering
2Ease of operation
If a steering wheel on a steering column is used for steering, then the work machine can be steered, but the operator must use one hand exclusively for steering leading to faster operator fatigue
Solution Approach 1:
The steering function is divided between a primary steering device and a secondary steering device, allowing the operator to use both hands on the joystick for steering when operating during field travel. This bilateral hand usage distributes the physical effort and reduces fatigue, enabling longer duration operation
Solution Approach 2:
The armrest supporting the secondary steering device is articulated and can be dynamically adjusted to optimal positions for the operator. This dynamic positioning allows the operator to maintain comfortable posture throughout extended operation periods, improving endurance
3Ease of operation
If a steering wheel on a steering column is used for steering, then the work machine can be steered, but comfort features of the driver's seat such as seat suspension, upholstery, or a swivel seat cannot be used optimally
Solution Approach 1:
The steering system is segmented into primary and secondary independent steering devices, allowing the operator to use the secondary joystick with both hands while maintaining proper seating posture. This enables full utilization of seat comfort features like suspension and upholstery, as the operator no longer needs to lean forward
Solution Approach 2:
The secondary steering device on the articulated armrest serves multiple functions: it provides alternative steering control, allows both-handed operation for reduced fatigue, and enables proper utilization of seat comfort features. The articulated armrest itself provides positioning and support functions
Data Source
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AI summary
The present invention relates to an agricultural machine comprising a driver's cab (1), a driver's seat (2), an armrest (3) arranged adjacent to the driver's seat (2) on which a multifunction handle (4) for controlling working units of the machine is arranged, and a primary steering device (7) arranged in the driver's cab (1) which is designed and configured for steering the machine, wherein the primary steering device (7) is arranged in front of and spaced apart from the driver's seat (2), wherein a secondary steering device (29) is arranged in the driver's cab (1) which is designed and configured for steering the machine, wherein the secondary steering device (29) is arranged on a further armrest (10) articulated to the driver's seat (2), wherein the primary steering device (7) can be deactivated for steering with the secondary steering device (29).