Hydraulic Leveling Foot for Automatic Appliance Leveling

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Solution Overview

Problem

Existing household appliance leveling systems require manual adjustment, are time-consuming, and lack accuracy, leading to vibration and noise issues due to uneven support, especially in heavy appliances like washing machines.

Innovation Solution

A hydraulic leveling device with movable parts and a hollow chamber filled with hydraulic medium, allowing for automatic adjustment under varying pressures to ensure stable and even support.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If manual leveling adjustment is used, then the structure is simple, but the operation is time-consuming and labor-consuming

Engineering Contradiction:
Improveleveling adjustment operationVSAvoidleveling adjustment time
Core Design Contradiction:
Ease of operationVSLoss of time

Solution Approach 1:

The leveling device automatically adjusts the appliance level by itself using hydraulic mechanisms and sensors, eliminating the need for manual user operation. The system self-detects uneven surfaces and self-adjusts the leveling feet positions automatically.

Inventive Principle:
Principle #25Self-service

Solution Approach 2:

The patent replaces manual mechanical adjustment with an automated hydraulic system. Instead of users manually turning adjustment mechanisms, the system uses hydraulic cylinders actuated by sensors to automatically position the leveling feet.

Inventive Principle:
Principle #28Mechanics substitution (Replace mechanical system)

2Manufacturing precision

If manual leveling adjustment is used, then the device complexity is low, but the leveling precision is poor

Engineering Contradiction:
Improveleveling accuracyVSAvoidleveling device structure
Core Design Contradiction:
Manufacturing precisionVSDevice complexity

Solution Approach 1:

The system incorporates sensors that detect the appliance's level status and provide feedback to the control system. Based on this feedback, the control system automatically adjusts the hydraulic mechanisms to achieve precise leveling, ensuring high accuracy through continuous monitoring and adjustment.

Inventive Principle:
Principle #23Feedback

Solution Approach 2:

The patent employs hydraulic cylinders and fluid pressure mechanisms to achieve precise and smooth adjustment of the leveling feet. The hydraulic system provides fine control over the positioning, enabling high leveling precision while supporting heavy appliance weights.

Inventive Principle:
Principle #29Pneumatics and hydraulics

3Reliability

If the appliance weight is large, then the support stability should be high, but the manual adjustment becomes more difficult

Engineering Contradiction:
Improvesupport stabilityVSAvoidadjustment ease
Core Design Contradiction:
ReliabilityVSEase of operation

Solution Approach 1:

The heavy appliance leveling system operates automatically without requiring user intervention. The sensors detect the uneven surface and the hydraulic system automatically adjusts the leveling feet to compensate for the appliance's weight, maintaining stability without manual effort.

Inventive Principle:
Principle #25Self-service

Solution Approach 2:

The hydraulic system is designed to handle the full weight of heavy appliances. High-pressure hydraulic cylinders provide sufficient force to support and precisely position the appliance, ensuring both stability and ease of operation through automated control.

Inventive Principle:
Principle #29Pneumatics and hydraulics

4Object-affected harmful factors

If the leveling foot is not stable, then the vibration during operation increases, but the automatic leveling requires complex mechanisms

Engineering Contradiction:
Improvevibration and noiseVSAvoidautomatic leveling mechanism
Core Design Contradiction:
Object-affected harmful factorsVSDevice complexity

Solution Approach 1:

Sensors continuously monitor the appliance's level and stability during operation. When vibration or unevenness is detected, the control system receives feedback and automatically adjusts the hydraulic leveling mechanisms to correct the issue, reducing vibration and noise through active stabilization.

Inventive Principle:
Principle #23Feedback

Solution Approach 2:

The hydraulic system provides smooth, vibration-free adjustment due to the inherent damping properties of hydraulic fluid. The system can make fine, controlled adjustments to eliminate vibrations and maintain stability during appliance operation.

Inventive Principle:
Principle #29Pneumatics and hydraulics

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 hydraulic leveling device simplifies the leveling process, reduces vibration and noise, and enhances user comfort by providing reliable and adaptive automatic leveling.

Implementation Method 1

a hollow chamber is formed between the fixed part and the movable part. The hollow chamber is provided with a hydraulic medium. Under the action of pressure, the hydraulic medium circulates in the hollow chamber inside the leveling foot and/or the hollow chamber between leveling feet to realize the expansion and contraction of the movable part

Methodology Applied
Scientific EffectHydraulic principle: Hydraulic Press

Implementation Method 2

Each leveling foot is filled with hydraulic medium and gas. Under different pressures, the hydraulic medium and the gas within the leveling foot interact with each other to realize the expansion and the contraction of the movable part, to level automatically

Methodology Applied
Scientific EffectGas compression and expansion: Compression

Data Source

PatentUS10745850B2Leveling device of household appliance and household appliance having the same
Publication Date: 2020.08.18 QINGDAO HAIER WASHING MASCH CO LTD
  • US10745850B2 patent drawing
  • US10745850B2 patent drawing
  • US10745850B2 patent drawing

AI summary

The bottom of a household appliance is provided with leveling feet. The leveling foot comprises a fixed part and a movable part, and a hollow chamber is formed between the fixed part and the movable part. The hollow chamber is provided with a hydraulic medium. Under the action of pressure, the hydraulic medium can be circulated in the hollow chamber inside the leveling foot and/or the hollow chamber between leveling feet to realize the expansion and contraction of the movable part, to execute automatic leveling. The leveling device of a household appliance of the present disclosure, according to the hydraulic principle, is provided with a hydraulic medium in the leveling foot. Under different pressures, the leveling foot is made to automatically adjust adaptively due to the fluidity of the hydraulic medium.