Four-Link Door Hinge With Sliding Damper
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Solution Overview
Problem
Existing door hinges with a four-link rod design are complex, difficult to mount, and have low production efficiency and short service life due to unreasonable structure and complicated damper installation.
Innovation Solution
A door hinge with a simplified structure featuring a bilateral fork arm support link rod arm and a slidingly mounted damper within a hinge cup, where the damper's piston rod abuts an internal wall and bosses on the cylinder body interact with fork arm protrusions for cushioning self-close functionality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a damper is mounted in the hinge cup using existing structures, then cushioning self-close function is achieved, but the structure becomes complex and mounting becomes difficult
Solution Approach 1:
The support link rod arm is divided into a bilateral fork arm structure with two separate arms (first and second arms) that can independently interact with the damper. This segmentation allows the damper to be mounted between the two arms in a simplified manner, reducing overall structure complexity while maintaining the cushioning function.
Solution Approach 2:
The damper is slidingly mounted within the hinge cup, nesting the damper component inside the existing hinge cup structure. This eliminates the need for separate mounting brackets or complex external attachments, simplifying the overall structure while achieving the cushioning self-close function.
2Reliability
If a damper is mounted in the hinge cup using existing structures, then cushioning self-close function is achieved, but mounting convenience deteriorates
Solution Approach 1:
The hinge cup is pre-formed with a sliding mount structure that accommodates the damper before final assembly. The bilateral fork arm structure is also pre-configured with positioning features that guide the damper into place, making the mounting process straightforward and convenient without requiring complex alignment or additional fastening steps.
3Reliability
If existing door hinge structure is used, then cushioning self-close is achieved, but production efficiency is low
Solution Approach 1:
The damper mounting structure is merged with the existing hinge cup and support link rod arm components. The bilateral fork arm and sliding mount features are integrated into the basic hinge structure, eliminating the need for separate mounting hardware and reducing assembly steps, thereby improving production efficiency while maintaining the cushioning function.
4Reliability
If existing door hinge structure is used, then cushioning self-close is achieved, but service life is short
Solution Approach 1:
The bilateral fork arm structure with protrusions and corresponding recesses in the damper creates a self-aligning and self-retaining mounting system. The protrusions fit into recesses to prevent lateral displacement, and the sliding mount allows for natural accommodation of thermal expansion and wear, reducing stress on mounting points and extending service life without requiring additional maintenance or adjustment mechanisms.
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 solution simplifies damper assembly, enhances production efficiency, and extends the service life by providing a reasonable structure for easy mounting and effective cushioning self-close functionality.
Implementation Method 1
a door hinge of four-link rod, which can cushion self-close, comprising a door hinge of four-link rod, which is formed by hinging a hinge seat, a hinge cup, a support link rod arm and an elastic link rod arm, and a damper for cushioning self-close of the door hinge
Data Source
Figure 1
Figure 2
AI summary
The present invention discloses a door hinge of four-link rod, which can cushion self-close, comprising: a door hinge of four-link rod, which is formed by hinging a hinge seat, a hinge cup, a support link rod arm and an elastic link rod arm, and a damper for cushioning self-close of the door hinge, characterized in that: the support link rod arm has a bilateral fork arm hinged with the hinge cup, the damper is slidingly mounted in the hinge cup between the two fork arms along a swinging direction of the support link rod arm, an end of a piston rod of the damper abuts against an internal wall of the hinge cup adjacent to the hinging side, two sides of a cylinder body of the damper are formed with a boss which surface faces towards a bottom of the cylinder body, two fork arms form a protrusion which can abut against the surface of the boss. As the door hinge of four-link rod of the present invention has simple structure, assembly of the damper is facilitated, the production efficiency can be improved; moreover, the service life of the door hinge is prolonged due to the reasonable structure.