Dishwasher Door Spring Tension Adjustment for Built-In Cover Loads
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Solution Overview
Problem
In built-in dishwashers, adjusting the spring tension to accommodate varying weights of door covers is inconvenient, requiring disassembly and manual adjustment, which complicates installation and usage.
Innovation Solution
A dishwasher design featuring a spring adjustment apparatus with a movable bracket, adjustment member, and support bracket, allowing for easy adjustment of spring tension without disassembling the side cover, using position verification holes for accurate positioning and tool-accessible adjustment holes for convenient tension adjustment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a cover is coupled to the door to achieve built-in appearance, then the aesthetic value and space efficiency are improved, but the door weight changes requiring spring tension adjustment
Solution Approach 1:
The spring tension adjustment mechanism is designed to be dynamic and adaptable. The spring can be repositioned between multiple holes on the hinge member to adjust tension according to different door weights. This dynamic adjustment capability allows the system to adapt to various cover materials and weights while maintaining proper door operation.
Solution Approach 2:
The adjustment mechanism is segmented into discrete adjustment positions (multiple holes on the hinge member). This segmentation allows for stepwise tension adjustment without requiring complete disassembly of the door assembly, reducing the overall complexity while maintaining adaptability.
2Manufacturing precision
If the spring tension is adjusted by disassembling the door case, then the spring tension can be precisely adjusted, but the ease of operation deteriorates
Solution Approach 1:
The adjustment holes are extracted and positioned on the hinge member in a location that is accessible without complete disassembly of the door case. This allows users to access and adjust the spring tension by simply removing the door panel rather than disassembling the entire door assembly, improving ease of operation while maintaining precision.
Solution Approach 2:
The hinge member serves as an intermediary element that provides adjustment holes accessible from the exterior. This intermediary structure allows tension adjustment without requiring direct access to the spring's attachment point on the door case, simplifying the adjustment process while maintaining precision.
3Adaptability or versatility
If multiple adjustment holes are provided on the hinge member, then the adaptability to different weights is improved, but the device complexity increases
Solution Approach 1:
The hinge member is designed with multi-functionality. It not only serves as the rotational joint for the door but also incorporates multiple adjustment holes that provide tension adjustment capability. This universal design allows a single component to fulfill multiple functions, increasing adaptability without proportionally increasing overall device complexity.
Solution Approach 2:
The adjustment holes are merged into the hinge member structure itself rather than being separate components. This combining of the adjustment mechanism with the existing hinge member reduces the number of separate parts and simplifies the overall device structure while maintaining adaptability to different weights.
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 users and technicians to conveniently adjust spring tension based on door cover materials and weights, ensuring proper installation and easy operation, while minimizing material costs and simplifying the structure.
Implementation Method 1
one end of a spring fixed onto the main body of the dishwasher is connected to the hinge member to pull the door of the dishwasher
Implementation Method 2
a friction unit is formed on a predetermined portion of the wire, where the wire is connected to the door hinge, to generate friction while making contact with a frame provided on the housing
Data Source
AI summary
A dishwasher that enables a user to adjust a load of a spring depending on material and weight of a cover that is attached to a door of the dishwasher. The dishwasher includes a housing having a bottom, a rear, and side covers, a door rotatably installed on a front surface of the housing, a door hinge installed onto each lower end of the door while being rotatably coupled to the housing, a spring configured to adjust a rotation of the door, and an apparatus of adjusting the spring configured to adjust a load of the spring. The apparatus includes a movable bracket connected to the spring, an adjustment member which enables the movable bracket to move up and down, and a support bracket configured to support the adjustment member. A position verification hole is perforated through the housing such that the apparatus is checked from outside the housing.