Reciprocating Blade Sealing Member for Conversion Mechanism Protection
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Solution Overview
Problem
In working machines like lawn clippers, cut objects often cross over a scraper and reach the conversion mechanism, leading to potential damage or inefficiency.
Innovation Solution
A sealing member is engaged with the first blade and reciprocates with it, pushing cut objects away from the conversion mechanism and into discharge ports, while a cover member with projecting walls and grease guards prevent further movement and spatter.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a scraper is used to push cut objects away from the blade, then cut objects are discharged in the direction along the first direction, but some cut objects still cross over the scraper and reach the conversion mechanism
Solution Approach 1:
A sealing member is introduced as an intermediary component between the blade assembly and the conversion mechanism. This sealing member includes a sealing surface that contacts the blade and extends forward in the reciprocating direction, creating a physical barrier that prevents cut objects from bypassing the scraper and reaching the conversion mechanism while maintaining the discharge function.
2Object-affected harmful factors
If the sealing member is engaged with the first blade, then the sealing member reciprocates with the first blade to push cut objects away, but the sealing member may interfere with the blade's reciprocating motion
Solution Approach 1:
The sealing member is segmented into distinct functional portions: a sealing surface for contacting the blade, a forward-extending portion for blocking cut objects, and a rear portion that reciprocates with the blade. This segmentation allows each portion to perform its specific function without interfering with the overall reciprocating motion of the blade assembly.
Solution Approach 2:
The sealing member is designed to reciprocate dynamically with the first blade, maintaining continuous contact through the sealing surface while the forward-extending portion remains positioned to block cut objects. This dynamic configuration ensures the sealing member adapts to the blade's motion without restricting its reciprocating operation.
3Object-affected harmful factors
If the sealing member extends forward to block cut objects, then cut objects are suppressed from reaching the conversion mechanism, but the sealing member structure becomes more complex
Solution Approach 1:
The sealing member combines multiple functions into a single integrated component: it seals the gap between the blade and cover member, blocks cut objects from reaching the conversion mechanism, and reciprocates with the blade. This merging of functions into one component reduces overall device complexity compared to using separate components for each function.
Data Source
AI summary
A working machine may include: a conversion mechanism configured to convert motion of a prime mover; a first blade connected to the conversion mechanism; a second blade overlapping with the first blade in an up-down direction and facing a first facing surface of the first blade; a sealing member engaged with a first non-facing surface of the first blade that is opposite to the first facing surface, wherein the sealing member includes a first sealing surface facing the first non-facing surface in the up-down direction; and a cover member facing a second sealing surface of the sealing member that is opposite to the first sealing surface of the sealing member. The sealing member may be disposed forward of the conversion mechanism and configured to suppress the object cut with the first blade and the second blade from moving toward the conversion mechanism between the first blade and the cover member.