Spring-Locked Switch Handle Assembly for Lawn Mower Cutter Control
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Solution Overview
Problem
Existing lawn mowers have cumbersome and inconvenient ON-OFF operations for the clutch lever due to complex structures and multiple required actions, affecting packaging and operational efficiency.
Innovation Solution
A switch handle component with a manipulating handle, locking plate, and tension spring that allows automatic locking in ON or OFF positions, simplifying the operation by rotating the handle to different positions, and a cable assembly connecting to a belt tensioning component for controlling the cutter.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the clutch handle is provided under the steering wheel, then the packaging height is affected, but the ease of operation is improved
Solution Approach 1:
The clutch handle is moved from the traditional under-steering-wheel position to the side of the seat, changing the spatial dimension of the control mechanism. This dimensional relocation resolves the conflict by providing ergonomic accessibility without compromising packaging height, as the handle now operates in a different spatial plane alongside the operator rather than beneath the steering wheel
2Reliability
If the clutch lever is locked by a locking slot, then the position is secured, but the device complexity increases
Solution Approach 1:
The locking slot mechanism is completely removed from the design. Instead of using a separate locking slot structure, the patent employs a tension spring that naturally maintains the clutch lever in its operational position through elastic force. This extraction of the locking slot eliminates the complex multi-component locking mechanism while preserving position stability through the spring's continuous holding force
Solution Approach 2:
The tension spring serves as a self-regulating positioning mechanism that automatically maintains the clutch lever in the correct position without requiring external locking structures. The spring's elastic properties provide continuous positional feedback and correction, making the system self-sufficient and eliminating the need for complex locking slots
3Manufacturing precision
If multiple actions are required for turning on or off the clutch lever, then the position control is precise, but the ease of operation deteriorates
Solution Approach 1:
The tension spring is pre-loaded to provide continuous positioning force on the clutch lever, establishing the correct operational position before the operator needs to act. This preliminary positioning action eliminates the need for multiple sequential operations, as the spring has already prepared the lever in the correct position, requiring only a simple push or pull from the operator to engage or disengage
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
Enables convenient, ergonomic, and cost-effective operation with automatic locking and safety features, ensuring the cutter is controlled efficiently and safely without additional locking mechanisms, and allows quick braking and power transmission.
Implementation Method 1
one end of the first tension spring is fixed to the frame and is provided near a rotating shaft of the locking plate, and the other end thereof is fixed to the middle of the locking plate; when the manipulating handle rotates to different positions, the first tension spring applies tension in different directions to the locking plate, respectively, so as to realize the automatic locking of the manipulating handle
Data Source
AI summary
The present disclosure provides a switch handle component and a cutter control system containing the same, relates to the technical field of lawn mowers, and solves the technical problems of cumbersome and inconvenient ON-OFF operation of a clutch lever. The switch handle component comprises a manipulating handle, a locking plate, a fixed seat and a first tension spring, wherein the fixed seat is fixed to a frame; the manipulating handle is fixedly connected to the lower part of the locking plate; the locking plate is rotatably connected to the fixed seat; one end of the first tension spring is fixed to the frame and is provided near a rotating shaft of the locking plate, and the other end thereof is fixed to the middle of the locking plate; when the manipulating handle rotates to different positions, the first tension spring applies tension in different directions to the locking plate, respectively, so as to realize the automatic locking of the manipulating handle after switching among the OFF position, the dead point position and the ON position. The switch handle component of the present disclosure can automatically keep a certain force value after being moved to the proper position when switching between the ON state and the OFF state, so that the position can be automatically locked, and the operation is convenient and simple.