Heavy-Door Hinge Link Structure With Resin Spacers
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Solution Overview
Problem
The existing hinge device design is prone to distortion and instability when supporting heavy doors due to gaps between the side walls of the first hinge body and the moving link, which can lead to unstable support and potential rubbing between metal components.
Innovation Solution
The hinge device incorporates resin spacers between the side walls of the first hinge body and the moving link, allowing the first hinge body to receive the load through the second hinge body and the moving link, while avoiding direct metal-to-metal contact, thus stabilizing the support and preventing distortion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If resin spacers are interposed between the side walls of the first hinge body and the moving link to prevent metal rubbing, then the reliability is improved, but the load-bearing capacity deteriorates due to gaps forming between the side walls
Solution Approach 1:
The patent introduces resin spacers as intermediary elements between the side walls of the first hinge body and the moving link. These spacers serve as mediators that prevent direct metal-to-metal contact and rubbing, while still allowing the structure to bear load through the spacer material itself. The spacers are positioned to fill the gaps that would otherwise form, transferring mechanical stress from the metal components to the resin spacers.
Solution Approach 2:
The patent employs composite material construction by combining metal components (hinge body and moving link) with resin spacer materials. This composite approach allows the metal parts to provide structural framework and rotational functionality, while the resin spacers provide load distribution, rubbing prevention, and gap filling. The composite structure leverages the advantages of both materials: the strength and rigidity of metal, and the damping and conformability of resin.
2Reliability
If the moving link is designed with wider side walls than the first hinge body to prevent metal contact, then the reliability is improved, but the device complexity increases due to the need for precise spacing and alignment
Solution Approach 1:
The resin spacers act as built-in intermediaries that are integrated into the moving link structure. Rather than relying on precise external spacing mechanisms, the spacers are attached to the moving link's side walls, creating self-contained positioning elements. This reduces the complexity of alignment requirements during assembly, as the spacers naturally maintain the necessary gaps and prevent metal contact through their inherent presence rather than through complex mechanical constraints.
Data Source
Figure 1A~1B
Figure 1C
Figure 2A
AI summary
A hinge device 3 capable of supporting a heavy door 2 includes a first hinge body 10 fixed to a housing 1, a second hinge body 20 fixed to the door 2 and a link mechanism 6 interposed between the first hinge body 10 and the second hinge body 20. The link mechanism 6 includes a moving link 30 having a rear end rotatably connected to the first hinge body 10 in the front-rear direction and a front end rotatably connected to the second hinge body 20, a front connecting link 50 having a proximal end portion rotatably connected to a front end portion of the first hinge body 10 and an intermediate portion rotatably connected to an intermediate portion of the moving link 30, and a supporting link having one end rotatably connected to a distal end of the front connecting link 50 and the other end rotatably connected to the second hinge body 20. The front connecting link 50 has a pair of resin spacers 57 interposed between the pair of side walls 11 of the first hinge body 10 and the pair of side walls 31 of the moving link 30.