Lawn Mower Cutting Assembly With Protected Anti-Wrapping Blade Space
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Solution Overview
Problem
The cutting member of a lawn mower is prone to getting stuck by mud or wound by grass, leading to reduced efficiency and potential damage.
Innovation Solution
A cutting assembly with a protection member and blocking members that form a protection space around the cutting member, allowing it to rotate and protect against dirt and weeds, while a fixing member ensures the cutting member's rotation and safety.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the cutting member is exposed to perform cutting operations, then the cutting efficiency is improved, but the cutting member is prone to getting stuck by mud or wound by grass
Solution Approach 1:
The cutting member is segmented into two functional zones: an exposed cutting portion for efficient plant cutting and a protected storage portion for safety and cleanliness. The protection member creates a spatial separation between these functions, allowing the cutting member to maintain high productivity while reducing exposure to harmful factors.
Solution Approach 2:
The protection member acts as an intermediary structure between the cutting member and the external environment. It provides a buffer zone that prevents direct contact between the cutting member and harmful elements like mud and grass, thereby maintaining reliability without compromising cutting efficiency.
2Reliability
If the cutting member is protected from external contact, then the damage to the cutting member is reduced, but the cutting efficiency may be affected
Solution Approach 1:
Different portions of the cutting member have different functional requirements. The local quality principle is applied by exposing only the necessary cutting edge portion while protecting the storage portion. This selective protection approach maintains cutting efficiency by leaving the cutting portion accessible while protecting non-critical areas.
Solution Approach 2:
The cutting member's functionality is segmented into active cutting operations and passive storage. The protection member creates a spatial segmentation that allows the active portion to remain exposed for productivity while the storage portion is protected for reliability, resolving the contradiction between protection and efficiency.
3Reliability
If the cutting member rotates freely, then the damage upon hitting hard objects is reduced, but the cutting member may get stuck by mud or grass
Solution Approach 1:
The protection member serves as an intermediary barrier that filters harmful factors before they reach the cutting member. It allows beneficial rotation for impact resistance while blocking harmful contact with mud and grass, effectively resolving the contradiction between impact resistance and resistance to sticking.
Solution Approach 2:
The protection member creates a localized protective environment around the cutting member's storage portion. This local protection allows the cutting member to rotate freely for impact resistance while preventing mud and grass from wrapping around the exposed cutting edges, maintaining both reliability and resistance to harmful factors.
Data Source
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AI summary
A cutting assembly and a lawn mower are provided. The cutting assembly includes a cutter head, a protection member, blocking members, and a cutting member. The cutter head is connected to the lawn mower body. The protection member is snap-fitted with the cutter head. The blocking members are arranged in a circumferential direction of the protection member and are provided between the cutter head and the protection member. Each of the blocking members includes a protrusion protruding toward a center of the cutter head. The protection member, the cutter head and the protrusion form and enclose a protection space, the protection space being located on a side of the protrusion proximate to an edge of the cutter head. The cutting member is rotatably provided in the protection space, the cutting member extends at least partially beyond the protection space, and the cutting member is configured for cutting plants.