Mower Transmission Casing for Friction Reduction
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Solution Overview
Problem
Conventional mower devices have exposed kinematic transmission groups that get wet and dirty, leading to increased wear and friction, reducing the efficiency of the cutter bar.
Innovation Solution
The mower device features a protective casing that houses the transmission means, including a mobile body and guide means, which transforms the activating arm's oscillation into a perpendicular alternating movement, with lubrication to reduce friction and prevent dirt and moisture entry.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the kinematic transmission group is exposed to the work environment, then the device complexity is reduced and ease of manufacture is improved, but the transmission parts get wet and dirty, increasing wear and friction, reducing efficiency
Solution Approach 1:
The patent applies a protective casing (shell) to enclose the transmission means, transforming the open transmission group into a protected system. The casing acts as a barrier that prevents dirt and moisture from entering the transmission components while allowing the transmission to function effectively. This resolves the contradiction by maintaining ease of manufacture through a relatively simple casing structure while significantly improving reliability by protecting against environmental contaminants.
2Reliability
If the transmission means are protected by a casing, then wear and friction are reduced, but the device complexity increases
Solution Approach 1:
The protective casing is designed as a relatively simple enclosures that surrounds the transmission means without adding complex mechanical structures. The casing may include basic features like an input for lubricant introduction and a mobile shutter for connection, but avoids overly complicated designs. This approach improves reliability through protection while controlling device complexity by using a straightforward protective structure rather than a complex system.
Solution Approach 2:
The transmission means are equipped with a lubricant system that can be replenished through an input in the protective casing. The mobile shutter mechanism allows for self-service maintenance by enabling lubricant refilling without complete disassembly. This reduces the need for complex maintenance structures while maintaining the protective function, thus improving reliability without proportionally increasing device complexity.
3Ease of repair
If the protective casing is designed with separable portions, then ease of repair is improved, but the device complexity increases
Solution Approach 1:
The protective casing is divided into separable portions (such as a shell and cover) that can be easily detached from each other. This segmentation allows maintenance personnel to access the transmission means for repair and lubrication by simply separating the casing portions, without requiring complete disassembly of the entire device. The segmentation is designed to be straightforward, improving ease of repair while adding minimal complexity compared to a fully integrated casing design.
Solution Approach 2:
The mobile shutter acts as an intermediary element that facilitates connection between the activating arm and the protected transmission system. It provides a controlled access point through the protective casing, allowing for lubricant introduction and maintenance operations. This intermediary mechanism simplifies repair operations compared to complete disassembly while adding only a single functional component to the otherwise straightforward separable casing structure.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This solution protects the transmission components from the working environment, reducing wear and friction, thereby increasing the mower's efficiency and extending its lifespan.
Implementation Method 1
The protective casing contains a lubricant such as lubricating oil or, more preferably, lubricating grease
Data Source
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AI summary
A mower device (10), comprising at least a cutter blade (13), an activating arm (16) suitable for oscillating by rotating about a rotation axis (Z), and transmission means (19) suitable for transforming the oscillation of the activating arm (16) into an alternating motion of the cutter blade (13) in a direction (X) that is perpendicular to the rotation axis (Z). The transmission means (19) are contained internally of a protective casing (18) fixed to the cutter blade (13).