Gimbal for Three-Point Hitch Implement Rotation
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Solution Overview
Problem
Conventional methods for leveling turf areas, such as using box blades, are inefficient and require multiple passes, and standard three-point hitch systems do not allow for rotational freedom of implements like turfplaners, making it difficult to achieve a smooth and weed-free surface without chemical use.
Innovation Solution
A turfplaner system with a gimbal attachment to a three-point hitch, equipped with a laser guidance system and a rotational elongated cutter, decouples the implement's movement from the tractor's perpendicular movement, allowing precise leveling and weed removal in a single pass without chemicals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a standard three-point hitch is used to attach the implement to the tow vehicle, then the implement can be vertically lifted by hydraulic power, but the implement cannot rotate on the axis of the direction of travel
Solution Approach 1:
The attachment system is divided into two functional segments: the three-point hitch mechanism for vertical lifting and the gimbal assembly for rotational freedom. This segmentation allows each component to perform its specialized function independently, resolving the contradiction between hydraulic lifting capability and rotational freedom.
Solution Approach 2:
The gimbal assembly acts as an intermediary mechanism between the three-point hitch and the implement. It receives the vertical lifting force from the hitch and translates it into controlled rotational movement, enabling both hydraulic lifting and rotational freedom simultaneously.
2Ease of manufacture
If a conventional three-point hitch is used, then the implement can be attached to the tow vehicle, but any movement of the tractor perpendicular to the direction of travel translates into similar movement in the implement
Solution Approach 1:
The gimbal assembly serves as a mediator that decouples the implement's leveling precision from the tractor's perpendicular movements. It allows the implement to maintain a stable, precise orientation relative to the ground while the tractor moves independently, resolving the contradiction between attachment simplicity and leveling precision.
Solution Approach 2:
The gimbal mechanism provides multiple functions: it allows perpendicular movement of the tractor, enables implement rotation, and maintains leveling precision simultaneously. This multi-functionality resolves the contradiction by making a single attachment system capable of handling multiple operational requirements.
3Productivity
If box blade is used for leveling, then materials can be gathered from high spots and deposited in low spots, but the variation from gravitational planarity is mostly a function of the tractor and requires many passes
Solution Approach 1:
The patent replaces the purely mechanical box blade system with a turfplaner that uses a rotating cutter drum with cutting teeth. This substitution enables precise material removal through cutting action rather than dragging, allowing for faster leveling in fewer passes while reducing dependence on tractor movement characteristics.
Data Source
AI summary
A gimbal is provided for attaching an implement to a three-point hitch. The gimbal has an implement plate comprising a first side and a second side wherein attached to the first side is an upper implement bracket for coupling to an upper implement arm and a lower bracket for coupling to a lower implement arm wherein the second side comprises a retaining cavity. A tow plate is received in the retaining cavity and is rotational relative to the implement plate. The tow plate comprises lower brackets arranged to connect to lift arms of the three point hitch and an upper bracket arranged to connect to a stabilizer arm of the three point hitch.