Lawn Mower Grass Collection Unit Vertical Detachment Mechanism
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Solution Overview
Problem
The existing lawn mowers with grass collecting units require cumbersome and labor-intensive processes for attaching and detaching the grass collecting unit, involving multiple connecting bolts and the use of special equipment like cranes, which complicates operations and increases operator burden.
Innovation Solution
A lawn mower design featuring a support frame assembly with a vertically movable grass container and a connecting mechanism that allows for easy attachment and detachment without special equipment, using a stand unit to support the grass container and a pin connection system for secure engagement with the chassis, facilitating quick switching between mowing modes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the grass collecting unit is fixedly connected to the chassis through connecting bolts, then the connection strength and reliability are improved, but the ease of operation for attaching and detaching the unit deteriorates
Solution Approach 1:
The connecting mechanism is divided into separate components: a connecting member on the support frame assembly and a connecting unit on the chassis. These segments can engage and disengage independently without requiring removal of multiple bolts, thus maintaining connection reliability while improving ease of operation.
Solution Approach 2:
The support frame assembly is made vertically movable relative to the chassis through a driving unit (hydraulic cylinder). This dynamic capability allows the connecting member to automatically engage or disengage from the connecting unit by vertical movement, eliminating the need for manual bolt operations and crane assistance.
2Reliability
If multiple connecting bolts are used to secure the grass collecting unit, then the connection strength is improved, but the device complexity and time required for attachment/detachment increase
Solution Approach 1:
The complex multi-bolt connecting system is extracted and replaced with a simplified connecting mechanism consisting of a single connecting member and connecting unit. This extraction removes unnecessary complexity while maintaining the essential function of secure connection through the driving unit's vertical movement.
Solution Approach 2:
The static bolted connection is replaced with a dynamic connecting mechanism where the driving unit vertically moves the support frame assembly to engage or disengage the connecting member from the connecting unit. This dynamic approach reduces the number of fastening elements while ensuring reliable connection.
3Ease of operation
If a crane or lifter is used to suspend the grass collecting unit for bolt removal, then the ease of operation is improved, but the device complexity and operational time increase
Solution Approach 1:
The support frame assembly performs self-service by using its own driving unit to vertically move and automatically disengage the connecting member from the connecting unit. This eliminates the need for external cranes or lifters, reducing device complexity while maintaining ease of operation.
Solution Approach 2:
The static attachment system requiring external equipment is replaced with a dynamic self-service system. The driving unit enables the support frame assembly to autonomously perform attachment and detachment operations through vertical movement, eliminating dependency on external cranes or lifters.
4Reliability
If the grass collecting unit is made permanently fixed, then the reliability of connection is improved, but the adaptability for switching between mowing modes deteriorates
Solution Approach 1:
The permanently fixed connection is replaced with a dynamic connecting mechanism that can be engaged or disengaged at will. The driving unit enables vertical movement of the support frame assembly, allowing the grass collecting unit to be attached or detached based on operational needs, thus providing adaptability while maintaining connection reliability when attached.
Solution Approach 2:
The connecting mechanism is designed to serve multiple functions: it provides secure connection when the grass collecting unit is attached, and allows easy detachment when needed for mode switching. This multi-functionality enables the system to adapt between grass collection mode and mulching mode while maintaining reliable connection during operation.
Data Source
AI summary
A connecting mechanism (60) is provided for detachably connecting A grass collecting unit (30) to a chassis (4), and the connecting mechanism (60) includes a connecting unit (40) at the grass collecting unit side provided in a support frame assembly (31), and a connecting unit (50) at the vehicle body side provided in the chassis (4). The support frame assembly is vertically movable by the driving unit with the grass container (32) being supported to the ground through a support (70), which selectively achieves a connecting operation performed by the connecting mechanism (60) for connecting the connecting unit (40) at the grass collecting unit side to the connecting unit (50) at the vehicle body side, and a releasing operation performed by the connecting mechanism (60) for releasing connection between the connecting unit (40) at the grass collecting unit side and the connecting unit (50) at the vehicle body side.