Coordinated Operating Arm Geometry for Versatile Single-Axle Tractors
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Solution Overview
Problem
Existing adjustable operating arms for single-axle tractors are not optimally suitable for all use-cases or modes of operation, particularly when different types of auxiliary equipment are attached, due to their fixed or limited adjustability.
Innovation Solution
An adjustable operating arm with a coordinated mechanism that allows for parallel orientation of its members, incorporating a force accumulator, electric actuators, and locking mechanisms to facilitate versatile and ergonomic operation across various tasks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the operating arm is made immovable or with fixed adjustability, then the device complexity is reduced, but the adaptability to different auxiliary equipment and operating modes deteriorates
Solution Approach 1:
The operating arm transitions from a static or fixed structure to a dynamic, adjustable structure with two degrees of freedom. The proximal joint allows rotation of the proximal member relative to the main body, while the distal joint allows rotation of the distal member relative to the link member, enabling the arm to adapt to different operating conditions and auxiliary equipment configurations.
Solution Approach 2:
The operating arm is divided into multiple segments (proximal member, link member, distal member) connected by joints. This segmentation allows each segment to be independently adjusted and positioned, providing versatility while keeping each individual component relatively simple in design.
2Ease of operation
If the operating arm allows diagonal positioning behind the tractor, then the ease of operation is improved, but the stability of the operating arm configuration deteriorates
Solution Approach 1:
The operating arm provides dynamic adjustability through two rotational joints, allowing the operator to position the operating unit in various locations including diagonal positions behind the tractor. The coordination mechanism ensures that adjustments maintain proper geometric relationships, providing stability in the configured position.
Solution Approach 2:
The operating arm allows changes in multiple parameters simultaneously - the angle of the proximal member relative to the main body and the angle of the distal member relative to the link member. This coordinated parameter adjustment enables flexible positioning while maintaining configuration stability through the coordination mechanism.
3Ease of operation
If the operating arm members are kept parallel through coordination mechanism, then the ease of operation is improved, but the device complexity increases
Solution Approach 1:
The coordination mechanism coordinates changes in two parameters - the rotation angle at the proximal joint and the rotation angle at the distal joint - to maintain a constant angle between the proximal and distal members. This ensures ergonomic operation while the coordination mechanism manages the complexity of simultaneous parameter adjustment.
Data Source
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AI summary
Disclosed is a mobile working machine (1) comprising an operating arm comprising: a proximal member (21) attached to the mobile working machine (1), a distal member (23) attached to an operating unit (3) for the mobile working machine (1), a link member arranged between the proximal member (21) and the distal member (23), rotatably connected to the proximal member (21) by a proximal joint (211) and the distal member (23) by a distal joint (231), and a coordination mechanism (4) configured such that the rotation of the proximal member (21) with respect to the link member around the proximal joint (211) and the rotation of the distal member (23) with respect to the link member around the distal joint (231) are coordinated to each other..