Compact Boat Lift Limit Switch with Narrow Gear Housing
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Solution Overview
Problem
Conventional boat lift limit switches are bulky, prone to overheating, and fail due to gear disengagement, causing interference with boat operations and potential damage.
Innovation Solution
A compact, ergonomic boat lift limit switch with thinner plastic gears and a narrower gear housing that integrates electronics and gear mechanism with the drive shaft, preventing lateral disengagement and overheating.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If conventional thick metal gears are used in the limit switch, then the gear mechanism can transmit sufficient force, but the gears are prone to overheating and lateral disengagement
Solution Approach 1:
The patent changes the material parameter from metal to plastic and reduces the thickness parameter of the gears. This parameter change reduces heat generation and allows for a more compact housing design that prevents lateral disengagement, thereby improving reliability while maintaining sufficient strength through optimized design
Solution Approach 2:
The patent uses plastic material for the gears instead of conventional metal. This material substitution reduces weight, heat generation, and enables a compact housing design that constrains lateral movement, solving both the overheating and disengagement problems while maintaining adequate mechanical strength
2Ease of operation
If a wide gear housing is used to accommodate the gears, then the gears have space to operate, but the housing width allows lateral disengagement of the gears
Solution Approach 1:
The patent reduces the width parameter of the gear housing to be less than the combined width of the interengaged gears. This parameter change creates a constraining effect that prevents lateral disengagement while still providing sufficient space for the thinner plastic gears to operate, thereby improving reliability
Solution Approach 2:
The patent employs a thin-walled compact gear housing that closely conforms to the gears. This thin housing design provides lateral constraint to prevent disengagement while maintaining adequate internal space for gear operation, solving the contradiction between operation space and engagement stability
3Strength
If a bulky limit switch device is used, then the switch components are well-supported, but the device interferes with boat positioning and operator movement
Solution Approach 1:
The patent merges the electronic module with the gear mechanism housing, integrating both components into a single compact unit. This consolidation eliminates the need for a bulky separate housing structure while providing adequate support for both the electronics and gears, thereby improving accessibility without compromising structural integrity
Solution Approach 2:
The patent nests the electronic module within or adjacent to the compact gear housing, with the electronic module confined between the bearing blocks. This nested arrangement minimizes the overall device footprint while maintaining proper support for both components, reducing interference with boat operations and personnel movement
Data Source
AI summary
A limit switch device for a boat lift includes a lower gear connected to and rotated by a drive shaft of the boat lift, and an interengaged upper gear operatively connected to an electronics module of the limit switch. The interengaged gears are enclosed within a gear housing that is sufficiently narrow to restrict the gears from laterally disengaging one another. The limit switch electronics module is mounted above the drive shaft and disposed interiorly of the gear mechanism. The module does not protrude beyond the frame bearing blocks that rotatably support the drive shaft and winder of the boat lift.