Door Hinge Structure for Multi-Axis Alignment and Preload Adjustment

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Solution Overview

Problem

Existing door hinges lack adjustable mechanisms for precise alignment and preload angle adjustment between the door shaft and hinge core, leading to installation challenges and limited flexibility in door positioning.

Innovation Solution

A door hinge with integrated adjustment mechanisms, including a first adjustment mechanism for horizontal movement, a second adjustment mechanism for vertical movement, and a third adjustment mechanism for preload angle adjustment, allowing for precise alignment and positioning of the hinge core relative to the door shaft.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Manufacturing precision

If the door hinge is pre-fixed on the cabinet body without adjustment mechanisms, then the installation process is simplified and the structure is more compact, but the matching precision between the door shaft and hinge core cannot be adjusted

Engineering Contradiction:

Improvematching precision between door shaft and hinge coreVSAvoidstructure complexity of door hinge

Core Design Contradiction:

Manufacturing precisionVSDevice complexity

Solution Approach 1:

The hinge core is designed with adjustable mechanisms that allow it to change position dynamically during installation. The first adjustment mechanism moves the hinge core along the installation direction, while the second adjustment mechanism moves it perpendicular to the installation direction, enabling precise alignment without requiring a complex fixed structure.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The adjustment system is divided into independent mechanisms: the first adjustment mechanism for movement along the installation direction, the second adjustment mechanism for perpendicular movement, and the third adjustment mechanism for rotation angle adjustment. This segmentation allows each mechanism to be optimized independently while maintaining overall simplicity.

Inventive Principle:

Principle #1Segmentation

2Ease of operation

If the hinge core position is fixed after installation, then the device structure is simpler and more compact, but the preload angle between the door shaft and hinge core cannot be adjusted

Engineering Contradiction:

Improveadjustability of preload angleVSAvoidnumber of adjustment mechanisms

Core Design Contradiction:

Ease of operationVSDevice complexity

Solution Approach 1:

Multiple adjustment functions are merged into a compact hinge structure. The first, second, and third adjustment mechanisms are integrated within the hinge seat and hinge core assembly, allowing position and rotation angle adjustments without requiring separate external adjustment devices.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The hinge core serves multiple functions: it acts as the connection interface for the door shaft, provides adjustable positioning through the first and second adjustment mechanisms, and enables preload angle adjustment through the third adjustment mechanism. This multi-functionality reduces the need for separate components.

Inventive Principle:

Principle #6Universality (Multi-functionality)

3Manufacturing precision

If multiple adjustment mechanisms are added to the door hinge, then the adjustability and precision are improved, but the device complexity and space requirements increase

Engineering Contradiction:

Improvealignment precision of door shaft and hinge coreVSAvoidspace occupied by door hinge

Core Design Contradiction:

Manufacturing precisionVSVolume of stationary object

Solution Approach 1:

The adjustment mechanisms are nested within the hinge seat and hinge core structure. The first adjustment mechanism is positioned within the hinge seat, while the second and third adjustment mechanisms are integrated with the hinge core, creating a compact nested arrangement that minimizes the overall volume.

Inventive Principle:

Principle #7Nested doll (Nesting)

Solution Approach 2:

The adjustment mechanisms utilize different spatial dimensions: the first adjustment mechanism operates along the installation direction (one dimension), the second adjustment mechanism operates perpendicular to the installation direction (another dimension), and the third adjustment mechanism provides rotational adjustment (angular dimension). This multi-dimensional approach allows comprehensive adjustment within limited space.

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

Data Source

PatentUS12534945B2Door hinge

Publication Date: 2026.01.27 SHANDONG HUAJING COLD CHAIN TECHNOLOGY CO LTD

AI summary

Provided is door hinge. Hinge seat therein has first adjustment mechanism moving back and forth along installation direction, and hinge core is located on one side of first adjustment mechanism; and first adjustment mechanism is fixedly provided with second adjustment mechanism and third adjustment mechanism, and hinge core, second adjustment mechanism, and third adjustment mechanism move simultaneously with first adjustment mechanism. Hinge core includes core part, first adjustment part, and second adjustment part, wherein first adjustment part is located on one end of core part away from first adjustment mechanism, and second adjustment part is located outside core part. Second adjustment mechanism drives second adjustment part to rotate, wherein second adjustment part rotates to drive core part to move along direction perpendicular to plane where first adjustment mechanism is located, and third adjustment mechanism drives first adjustment part to rotate.