Electric Pruner Quick-Release Blade Mechanism
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Solution Overview
Problem
Existing electric pruners require cumbersome and troublesome procedures for replacing the movable blade, often necessitating the detachment of parts or use of auxiliary tools, leading to frequent blunting and reduced cutting efficiency.
Innovation Solution
A quick-locking mechanism allows the movable blade to be manually locked or released without removing any parts, enabling simple and convenient replacement by operating a user-actuated locking device, eliminating the need for auxiliary tools.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the movable blade is made thin with a small cutting edge angle to improve cutting performance, then the cutting efficiency is improved, but the blade becomes easy to wear and requires frequent replacement
Solution Approach 1:
The patent implements a quick-release mechanism that allows the movable blade to be easily removed and replaced. The blade can be quickly detached from the blade holder and swapped with a fresh blade, enabling rapid recovery of cutting efficiency without lengthy disassembly procedures. This resolves the contradiction by making frequent blade replacement practical and convenient.
2Ease of repair
If traditional blade replacement procedures are used requiring housing detachment or bolt removal, then the blade can be replaced, but the replacement process becomes troublesome and time-consuming
Solution Approach 1:
The patent segments the blade replacement function from the main housing structure by implementing an independent quick-release mechanism on the blade holder. This allows the blade to be replaced without detaching the housing or using auxiliary tools, significantly reducing replacement time while maintaining ease of repair.
Solution Approach 2:
The quick-release mechanism is designed to be manually operated by the user without requiring external tools or assistance. The user can directly operate the locking device to release and replace the blade, making the replacement process self-service oriented and eliminating time loss associated with tool retrieval and complex disassembly.
3Reliability
If a secure locking mechanism is used to firmly attach the movable blade, then the blade connection is reliable, but the blade replacement process becomes complex requiring multiple steps
Solution Approach 1:
The patent implements a dynamic locking mechanism that can quickly transition between locked and unlocked states. The locking device features a simple two-position system (locked/unlocked) that provides reliable blade attachment during operation but allows rapid release for replacement. This dynamic design resolves the contradiction by making the blade connection state changeable from secure to easily removable on demand.
Data Source
AI summary
An electric pruner includes a housing, a motor accommodated within the housing, a transmission mechanism, a movable blade, and a fixed blade extending from the front end of the housing. The fixed blade is fixedly mounted on the housing, and the movable blade is rotatably connected to the fixed blade via a shaft and driven by the motor via the transmission mechanism. A locking device manually operable by the user is arranged on the shaft for locking the movable blade, the locking device being switchable between a first position where the movable blade is locked to stay connected with the transmission mechanism and a second position where the movable blade is releasable from the transmission mechanism. Thus, the replacement of the movable blade is very simple and convenient.