Compact Farming Gearbox With Sliding Pinion For Reversible Clutch
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Solution Overview
Problem
Current gearboxes for garden equipment, particularly tillers, are bulky, expensive, and inflexible, with complex mechanical parts that make it difficult to change between forward and reverse gears efficiently, limiting tool rotation speed ranges and requiring separate gearboxes for different functions.
Innovation Solution
A gearbox design with a sliding pinion that occupies forward and reverse gear positions, allowing quick and effortless transitions between gears, featuring a compact architecture with fewer parts, and a modular structure that can be configured for various applications without significant modifications.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If traditional gearboxes include multiple forward gears and reverse gear with complex mechanical parts, then the gearbox can provide multiple speed ranges, but the gearbox becomes bulky, expensive, and difficult to operate
Solution Approach 1:
The patent applies universality by designing a single-speed gearbox that can function as both a forward gear gearbox and a reverse gear gearbox through a reversible clutch mechanism. The same gearbox structure serves multiple functions by changing the engagement state of the clutch, eliminating the need for separate gearboxes for different functions and reducing overall complexity while maintaining versatility
Solution Approach 2:
The patent applies dynamics through the reversible clutch mechanism that can dynamically change the gear ratio and direction of power transmission. The clutch can be engaged or disengaged to switch between forward and reverse modes, allowing the gearbox to adapt its function in real-time without physical reconfiguration, thus providing multiple speed ranges with a fixed simple structure
2Reliability
If traditional gearboxes are designed for specific functions (single-speed, multi-speed, reverse), then they meet the specifications, but a new gearbox must be developed for each new product range
Solution Approach 1:
The patent applies universality by creating a single standardized gearbox design that can serve multiple product ranges and functions. The reversible clutch mechanism allows the same gearbox to be configured for single-speed forward operation, multi-speed operation, or reverse operation depending on clutch engagement, eliminating the need to develop new gearboxes for different product specifications and greatly improving ease of manufacture
Solution Approach 2:
The patent applies segmentation by separating the clutch mechanism from the gearbox structure, allowing the clutch to be independently engaged or disengaged to change gearbox functionality. This modular approach enables the same gearbox to be adapted for different functions without redesigning the entire system, improving manufacturing flexibility while maintaining reliable functionality
3Ease of operation
If traditional gearboxes require switching from fast forward to slow forward before reversing, then gear changes are made sequentially, but the operation becomes restrictive and time-consuming
Solution Approach 1:
The patent applies dynamics through the reversible clutch that can instantly change the direction of power transmission without requiring sequential gear changes. The operator can directly engage reverse by activating the clutch mechanism, skipping the intermediate slow forward gear step, thus reducing gear change time and improving ease of operation in restrictive terrain
Solution Approach 2:
The patent applies the extraction principle by removing the requirement for sequential gear changes through the reversible clutch mechanism. The clutch directly enables reverse engagement from any forward gear state by extracting the intermediate stepping process, allowing immediate direction reversal and significantly reducing the time and complexity of gear changes
4Device complexity
If traditional gearboxes use fixed gear ratios, then the structure is simple, but the tool rotation speed range is limited
Solution Approach 1:
The patent applies dynamics by incorporating a reversible clutch mechanism that dynamically changes the gear ratio and power transmission direction based on operational needs. The clutch can be engaged to provide reverse gear ratio or disengaged for forward gear ratio, allowing the simple fixed-structure gearbox to achieve multiple effective gear ratios and expand the tool rotation speed range without increasing structural complexity
Data Source
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AI summary
The invention relates to a gearbox for a mechanism farming implement, intended to interconnect driving means of the members that drive the implement, the box comprising an input shaft (10) designed to be rotationally driven by said driving means; an output shaft (9) designed to drive said drive members of the implement; a pinion (6) known as the sliding pinion mounted such that it can move on the input shaft (10), and designed to occupy at least one first forward-operation position, at least one second forward-operation position, and at least one reverse-operation position. The box is configured such that the reverse-operation position of the sliding pinion (6) is situated between two forward-operation positions.