Float Valve Snap Mechanism With Single Stopper Shaft
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Solution Overview
Problem
Conventional liquid pressure-feed devices have a complex structure and a large number of parts due to the requirement of two separate stopper shafts for restricting the rotational ranges of the float arm and sub-arm.
Innovation Solution
A single stopper shaft is used to restrict the rotational range of both the float arm during floating and the sub-arm during descent, simplifying the structure and reducing the number of parts by integrating the stopper function within the liquid pressure-feed device.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If two separate stopper shafts are used to restrict the rotational ranges of the float arm and sub-arm, then the rotational ranges can be effectively restricted, but the number of parts increases and the structure becomes complicated
Solution Approach 1:
The patent combines two separate stopper shafts into a single integrated stopper shaft that serves dual functions. The stopper shaft includes a first stopper portion for restricting the float arm rotation and a second stopper portion for restricting the sub-arm rotation, both integrated into one component that reduces overall structural complexity while maintaining effective rotational range restriction for both arms
Solution Approach 2:
The single stopper shaft is designed with multiple functional portions that perform different restriction functions. The stopper shaft universally serves to restrict rotational ranges of both the float arm and sub-arm through its different stopper portions, eliminating the need for separate dedicated stopper shafts for each arm
2Reliability
If two separate stopper shafts are used to restrict the rotational ranges of the float arm and sub-arm, then the rotational ranges can be effectively restricted, but the number of parts increases
Solution Approach 1:
The patent merges two separate stopper shafts into one integrated component. The single stopper shaft contains both the first stopper portion for the float arm and the second stopper portion for the sub-arm, directly reducing the total number of parts from two separate shafts to one unified shaft while preserving all necessary restriction functions
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 configuration results in a more streamlined and efficient liquid pressure-feed device with fewer components and a simpler structure, enhancing operational reliability and ease of maintenance.
Implementation Method 1
a snap mechanism having a pivot shaft supported within the closed vessel, a float arm and a sub-arm both adapted to rotate about the pivot shaft, further having a first shaft supported by the float arm, a second shaft supported by the sub-arm, and a spring mounted between the first and second shafts
Implementation Method 2
with a float, a change-over valve and a snap mechanism being provided within the closed vessel
Data Source
AI summary
A liquid pressure-feed device having a reduced number of parts and a simple structure is provided. A snap mechanism has a pivot shaft supported within a closed vessel, a float arm and a sub-arm both adapted to rotate about the pivot shaft, a first shaft supported by the float arm, a second shaft supported by the sub-arm, and a spring mounted between the first and second shafts. A float is connected to the float arm and a change-over valve is connected to the sub-arm through a power transfer shaft. There is provided a stopper shaft supported within the closed vessel, there is formed in the float arm a window through which the stopper shaft extends and which restricts a rotational range of the float arm with floating of the float, and there is formed in the sub-arm a window through which the stopper shaft extends and which restricts a rotational range of the sub-arm with descent of the float.