Bucket Door Snubber Chamber Layout for Pressure and Wear Control
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Solution Overview
Problem
Hydraulic snubbers used in excavation buckets face issues with high pressure and wear, as well as exposure to environmental factors, which affect their performance and durability.
Innovation Solution
A snubber apparatus comprising a casing with a rotatable shaft and wiper arm, where the wiper arm's movement changes the volume of fluid chambers to oppose forces, is designed to dampen door movements, featuring a dam and cover plates for structural support and sealing to enhance durability and performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If hydraulic snubbers are used to dampen door movements, then the door oscillation is reduced and impact at closing is minimized, but the components are subjected to high pressures and wear, reducing durability
Solution Approach 1:
The patent extracts the wiper arm from the high-pressure hydraulic fluid environment by positioning it in a separate atmospheric chamber, while still achieving the damping function through fluid displacement. This separation removes the wiper arm from the harmful high-pressure hydraulic environment, reducing wear and improving reliability while maintaining door stability control.
2Force
If hydraulic snubbers operate in high pressure environments, then effective damping force is achieved, but the components are exposed to elements and environmental factors affecting performance
Solution Approach 1:
The patent divides the snubber into two distinct chambers: an atmospheric chamber containing the wiper arm and shaft, and a hydraulic chamber containing the fluid under pressure. This segmentation allows the damping force to be generated in the protected hydraulic chamber while the wiper arm operates in the benign atmospheric environment, eliminating environmental exposure effects.
Solution Approach 2:
The hydraulic fluid acts as an intermediary that transmits force from the atmospheric chamber to the hydraulic chamber. The wiper arm displaces fluid through seals, and this fluid displacement generates the damping force without the wiper arm being directly exposed to high pressure or environmental factors.
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
The apparatus effectively dampens door movements, reducing impact and wear, while maintaining structural integrity and sealing to protect internal components from environmental factors.
Implementation Method 1
A fluid (e.g., hydraulic oil) moves between chambers, and this flow is controlled to oppose torque to the movement of the door
Implementation Method 2
the wiper moving with the excavation door to change the volume of the chambers
Implementation Method 3
snubbers also known as brakes, hydraulic brakes, dampers, mechanical snubbers, etc, are used to reduce oscillation of the door and slow down its movement, therefore reducing the impact at closing
Data Source
AI summary
An apparatus may have a casing defining an inner cavity delimited at least by a circumferential surface portion between a pair of lateral surface portions. A shaft passes through the inner cavity of the casing. A wiper arm rotates with the shaft, the wiper arm having a free end in close proximity to the surface portions of the inner cavity of the casing, the free end of the wiper arm having a contour complementarily corresponding to a profile of the circumferential surface portion of the inner cavity. A dam divides the inner cavity in chambers adapted to accommodate a fluid, with movements of the wiper arm changing the volume of the chambers, whereby the apparatus is configured to allow the fluid to flow between the chambers to oppose the force to the given motions. A cover plate(s) is connected to a lateral side of the casing and defining at least one outer chamber around the at least one end of the shaft and exteriorly of the inner cavity.