Removable Steering Wheel Layout for Better Cab Visibility
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Solution Overview
Problem
Mobile working machines, such as diggers, have a driver's cab positioned high above the ground, leading to a downward sloping angle of vision and restricted visibility due to the primary steering system, typically a steering wheel, which obstructs the operator's view when using a secondary steering system like a joystick.
Innovation Solution
The mobile working machine features a primary steering system, such as a steering wheel, that can be disconnected via a plug-in connection and stored away when not in use, allowing the secondary steering system to take over, with a quick coupling mechanism and detection device to ensure safe operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the primary steering system (steering wheel) is arranged in front of the driver's seat, then steering control is intuitive and reliable, but the operator's visibility of the floor area directly in front of the cab is restricted
Solution Approach 1:
The steering system is divided into two independent parts: a primary steering system (steering wheel) and a secondary steering system (joystick). The primary system can be disconnected and stored when not needed, allowing the secondary system to be used instead. This segmentation enables the operator to choose the appropriate steering method based on visibility requirements while maintaining both steering options available.
Solution Approach 2:
The steering column section is designed with a quick coupling mechanism that allows it to be rapidly connected and disconnected from the steering column mount. This dynamic configuration enables the steering wheel to be easily removed when visibility is a priority, and quickly reinstalled when traditional steering control is needed, adapting the system to changing operational requirements.
2Reliability
If the steering column section is permanently fixed to the steering column mount, then the primary steering system is always available, but the operator cannot improve visibility by removing the steering wheel
Solution Approach 1:
The connection between the steering column section and steering column mount is designed as a quick coupling rather than a permanent fixed connection. This allows the steering column section to be rapidly connected and disconnected based on operational needs. When the steering wheel needs to be removed for better visibility, the quick coupling enables easy detachment without compromising the reliability of the steering system when the wheel is reinstalled.
3Object-affected harmful factors
If the secondary steering system is used instead of the primary system, then visibility is improved, but the steering control becomes less intuitive
Solution Approach 1:
The steering control functions are segmented into two independent systems: the primary steering system with a steering wheel for intuitive control, and the secondary steering system with a joystick for improved visibility. Both systems can operate independently, allowing the operator to select the appropriate control method based on the specific operational requirements, whether prioritizing intuitiveness or visibility.
Data Source
AI summary
The disclosure relates to a mobile working machine comprising a driver's cab for accommodating an operator of the mobile working machine, a control station for the operator arranged in the driver's cab, a primary steering system arranged in front of the control station in the direction of travel of the mobile working machine, and a secondary steering system, arranged laterally offset from the control station in the direction of travel of the mobile working machine, wherein the primary steering system has a steering column section, which cooperates with a steering column mount to transmit a steering actuation to a control unit implementing the desired steering movement, wherein the steering column section and the steering column mount can be connected to each other in a rotationally fixed manner via a plug-in connection, such that the operator is able to dismount the primary steering system depending on a perceived visual restriction.