Motor Vehicle Door Hinge Four-Link Kinematics
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Solution Overview
Problem
Existing motor vehicle door hinge arrangements with four-bar kinematics often result in one door being unable to open independently of the other, especially when they overlap, due to a lack of independent movement paths and interference between adjacent elements.
Innovation Solution
A motor vehicle door hinge arrangement featuring a four-bar linkage with a first link carrying the main load and a second link with sliding joints, allowing for adjustable length and independent movement, enabling the door to open without interfering with adjacent elements by superimposing translational movement on pivoting motion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a door is hinged to the vehicle body via a single real pivot axis, then the door structure is simple, but the door cannot open independently when overlapping with an adjacent door
Solution Approach 1:
The hinge arrangement is divided into two separate links: a first link (support arm) for load-bearing and a second link (control rod) for motion control. This segmentation allows each link to perform its specific function independently, enabling the door to open without interference from adjacent doors while maintaining a manageable structural complexity.
Solution Approach 2:
The second link acts as an intermediary between the door and the vehicle body, controlling the door's movement path. By introducing this intermediate control element, the door can follow a predetermined trajectory that avoids overlapping with adjacent doors, resolving the conflict between independent operation and structural simplicity.
2Ease of operation
If a four-bar linkage is used to enable independent door opening, then the door can open without interfering with adjacent elements, but the hinge arrangement becomes more complex
Solution Approach 1:
The four-bar linkage is segmented into two distinct links with clearly differentiated functions: the first link (support arm) handles load-bearing, while the second link (control rod) handles motion control. This functional segmentation simplifies the overall design by assigning specific roles to each component, making the complex four-bar linkage more manageable and easier to implement.
Solution Approach 2:
Different parts of the hinge arrangement have different properties optimized for their specific functions. The first link is designed for strength and load-bearing capacity, while the second link is designed for precise motion control. This local optimization allows each component to perform its function efficiently, reducing the overall complexity of the system.
3Shape
If the second link has a sliding joint to control the door path, then the door can follow a desired movement trajectory, but the hinge arrangement requires additional sliding mechanisms
Solution Approach 1:
The sliding joint mechanism is segmented and integrated into the second link, which is already part of the four-bar linkage. By combining the sliding function with the existing control rod, the patent avoids adding a completely separate sliding mechanism, thereby reducing the overall complexity while still achieving the desired door movement trajectory.
Solution Approach 2:
The sliding joint function is merged with the second link of the four-bar linkage. The control rod incorporates the sliding mechanism, combining motion control and trajectory shaping into a single integrated component. This merging reduces the number of separate parts and simplifies the overall hinge arrangement.
Data Source
Figure 1~4
AI summary
The invention relates to a hinge arrangement for a door of a motor vehicle which is a four-link arrangement, that is, four-link kinematics having at least one first driver and one second driver. The first driver is connected about a rotation axis in a swiveling manner to the door via a door hinge of the first driver, which door hinge is fixed to the door and is in particular stationary. The first driver is further connected about a rotation axis in a swiveling manner to the body, that is, mounted to the body, via a body hinge of the first driver which is fixed to the body and is in particular stationary. The second driver is connected about a rotation axis in a swiveling manner to the door via a door hinge of the second driver and is connected about a rotation axis in a swiveling manner to the body via a body hinge of the second driver. At least the door hinge of the second driver or the body hinge of the second driver is movably mounted.