Van Door Hinge Non-Coincident Pivot Axes
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing vehicle door hinges for vans face issues with friction, sticking, and manufacturing complexity due to wear-resistant materials and additional spring devices required for stop systems, which increase costs and complicate treatments like cataphoresis and painting, while also requiring supplementary locking mechanisms.
Innovation Solution
A hinge design featuring a central body and rod with non-coincident pivot axes, using bushings to prevent interference with painting treatments and integrating a locking mechanism without additional devices, allowing smooth 270° rotation and secure locking at desired positions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If wear-resistant materials are used to reduce friction between bolt and profiles, then friction is reduced, but manufacturing complexity increases and the materials must be non-receptive to cataphoresis and painting treatments
Solution Approach 1:
The patent removes the bolt component entirely from the hinge mechanism. Instead of using a bolt that slides along profiles, the invention uses a different mechanical linkage system where the door wing is connected to the vehicle body through a hinge axis that allows direct rotation without sliding components. This eliminates the friction problem between bolt and profiles while avoiding the need for wear-resistant materials that would complicate manufacturing and surface treatments.
2Reliability
If clearances are provided in the sliding fastening of the bolt, then sticking is prevented, but hinge breakage risk increases and user convenience deteriorates
Solution Approach 1:
By eliminating the bolt and sliding fastening mechanism entirely, the patent removes the source of sticking problems. The new hinge design uses a fixed-axis rotation system where the door wing rotates directly on the hinge pin without any sliding components, thereby preventing sticking while maintaining structural integrity and user convenience.
Solution Approach 2:
Instead of providing clearances to prevent sticking in a sliding mechanism, the patent inverts the approach by eliminating the sliding mechanism altogether and using a pinned rotation system. This fundamental reversal of the mechanical principle avoids the sticking issue without requiring clearances that would compromise hinge strength.
3Reliability
If additional spring devices are mounted for stop system, then accidental opening beyond 90° is prevented, but manufacturing costs increase
Solution Approach 1:
The patent integrates the stop function directly into the hinge structure itself, combining the positioning function with the hinge mechanism. The hinge includes built-in stops or限位 features that are formed as integral parts of the hinge components, eliminating the need for separate spring devices while maintaining the ability to control door opening angles and prevent accidental over-opening.
Solution Approach 2:
The hinge mechanism is designed to perform multiple functions: it provides the rotational movement, maintains the door in open positions, and prevents over-opening beyond safe angles. By making the hinge multi-functional, the patent eliminates the need for additional specialized components like spring-based stop devices, thereby reducing manufacturing costs while maintaining reliability.
4Adaptability or versatility
If hinge is fastened to coplanar surface of chassis, then rotation beyond 180° is enabled, but projecting hinge would not be tolerable on vehicle
Solution Approach 1:
The patent employs a hinge design where the rotation axis is positioned and oriented such that the hinge components remain within the coplanar surface of the vehicle body during rotation. By carefully positioning the hinge pin and designing the linkage geometry, the system enables the door to rotate beyond 180° while keeping all hinge parts confined to the vehicle's exterior surface, avoiding any projecting elements.
5Ease of manufacture
If hinge is subjected to cataphoresis and painting treatments, then vehicle treatment consistency is maintained, but deposited material causes sticking or excessive friction
Solution Approach 1:
By removing all sliding components like bolts and profiles from the hinge mechanism, the patent eliminates surfaces that would accumulate deposited material and cause sticking. The pinned rotation system has minimal contact surfaces that do not slide against each other, thereby maintaining smooth operation even after cataphoresis and painting treatments are applied to the entire vehicle.
Data Source
Figure 1~3
Figure 4~6
AI summary
A hinge for vehicle doors, in particular for the rear doors of vans, with rotation of the wings about substantially vertical axes, comprising a first element (1) suitable to be fastened to a wing, a second element (3) suitable to be fastened to a fixed part of the vehicle, a central body (5) pivoted at one end to said first element and at an opposite end to said second element, a rod (8) pivoted at one end to said first element and at an opposite end to said second element, wherein the pivot axes that pivot the rod to each of said elements are not coincident with the pivot axes of said central body. The rod presents profiles (12, 12') suitable to interact with followers (13) fastened to the central body, thrust by springs (16, 16', 16"), so as to hold the wing in specific positions, until the force of the springs is overcome by acting on the wing.