Lawnmower Maintenance Coupling for Tool-Free Blade Holder Release
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Solution Overview
Problem
Existing lawnmowers require tedious and time-consuming assembly/disassembly processes due to the use of numerous pins for securing apparatuses and mechanisms, which reduces maintenance efficiency.
Innovation Solution
The lawnmower employs a first locking device with first pins and locking mechanisms that allow for rapid disassembly and assembly of the blade holder and base, utilizing first and second locking rods with elastic members for secure connection, and oscillating connection devices for adapting to terrain changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional pins and bolts are used to secure the blade holder to the base, then the connection is stable and reliable, but the assembly and disassembly process becomes tedious and time-consuming
Solution Approach 1:
The locking mechanism is segmented into multiple independent components: locking rods, elastic members, and locking grooves. Each component performs a specific function, allowing the system to achieve both stable connection and rapid release by manipulating individual segments rather than a unified fastening system.
Solution Approach 2:
The locking rods are designed to be dynamically controllable - they can be in a locked position securing the blade holder firmly, or quickly moved to an unlocked position for rapid disassembly. The elastic members provide dynamic response, automatically engaging locking grooves when the blade holder is installed and releasing them when force is applied to the locking rods.
2Stability of the object's composition
If multiple pins are used to fix various apparatuses and mechanisms, then the structural integrity is maintained, but the maintenance efficiency is reduced due to the need for tools and multiple steps
Solution Approach 1:
The locking mechanism is designed to be self-servicing during assembly - when the blade holder is placed onto the base, the elastic members automatically push the locking rods into the locking grooves, securing the connection without requiring external tools or manual intervention. This maintains structural integrity while eliminating tool-dependent assembly steps.
Solution Approach 2:
The elastic members act as intermediaries between the locking rods and the blade holder structure. They transmit and amplify the small movement of the locking rod into sufficient force to secure or release the connection, enabling tool-free operation while maintaining reliable structural attachment.
3Loss of time
If a simple pin connection is used for the blade holder, then the assembly is quick, but the connection stability and security are insufficient
Solution Approach 1:
The locking mechanism uses a nested structure where locking grooves are formed within the blade holder and base components, and locking rods fit into these grooves. The elastic members are nested within the locking rod assembly, providing automatic engagement force. This nested arrangement achieves secure connection through multiple interlocking elements that work together in a compact configuration.
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 design enables quick assembly/disassembly without tools, enhances connection stability, improves safety, and maintains high operational efficiency and adaptability to varying terrains.
Implementation Method 1
the first elastic member has a first end fixedly connected to the first locking rod and a second end fixedly connected to an inner side wall of the respective one of the first sliding-fit holes, and when no external force is applied to the first elastic member, an end of the first locking rod abuts against an outer side wall of a respective one of the first pins by an elastic force of the first elastic member
Data Source
AI summary
A lawnmower includes a power unit and a lawn mowing device, the power unit includes a base, the lawn mowing device includes a blade holder detachably connected to the base, the base is provided with a first locking device for fixing the blade holder, the first locking device includes a first installation rod on the base, first pins and first locking mechanisms disposed on the first installation rod for fixing the first pins, each end of the first installation rod is configured with a first insertion hole, the blade holder is configured with penetrating holes, and each of the first pins penetrates through a respective one of the penetrating holes and the first insertion hole sequentially.