Automobile Hinge Retaining Device with Anti-Twist Projections
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Solution Overview
Problem
Existing retaining devices for automobile hinges lack a reliable, cost-efficient, and safe method to temporarily secure automobile doors in an open position during painting processes, which can lead to instability and increased costs due to the need for precise positioning and potential damage.
Innovation Solution
A retaining device with a holder featuring a curved elongate hole and an eye concentric to the axis of rotation, equipped with projections that increase friction and provide anti-twist protection, allowing for secure temporary connection to the hinge, and a method involving a bolt connection that ensures the holder remains in place during painting, facilitating easy removal post-process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a retaining device is used to temporarily connect to a hinge, then the door can be held in an open position for painting, but the connection may be unstable and the device may displace
Solution Approach 1:
The holder is divided into functional segments: an eye for bolt connection, a curved elongate hole for stop pin engagement, and projections for frictional contact. This segmentation allows each feature to contribute specifically to connection stability without requiring precise positioning of the entire device.
Solution Approach 2:
The projections are pre-positioned on the holder to create frictional contact with the hinge member before the bolt is fully tightened. This preliminary frictional engagement prevents displacement during the painting process while allowing easy installation and removal.
2Reliability
If a retaining device without friction enhancement is used, then the structure is simpler, but the holder may rotate or twist on the hinge
Solution Approach 1:
Projections are added only at specific locations on the holder where frictional contact is needed, rather than making the entire holder complex. These localized features provide anti-rotation capability while maintaining overall structural simplicity and ease of manufacture.
3Reliability
If a retaining device is designed for secure connection, then the door remains stable during painting, but the device may cause damage to the hinge
Solution Approach 1:
The projections act as intermediaries between the holder and hinge member, distributing contact forces through frictional engagement rather than concentrated point loads. This reduces the risk of damage to the hinge while maintaining secure connection during the painting process.
4Reliability
If a retaining device with integrated anti-twist protection is used, then the holder remains stable, but the manufacturing cost increases
Solution Approach 1:
The anti-twist protection features (projections) are merged into the holder as an integrated one-piece structure, eliminating the need for separate anti-rotation components. This reduces assembly steps and manufacturing cost while providing the required stability.
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 provides a reliable, cost-efficient, and safe means to maintain automobile doors in a defined open position during painting, preventing unwanted displacement and allowing for reuse, thus saving time and material costs.
Implementation Method 1
the at least one projection increases the friction between the hinge member and the holder, so that the holder is arranged at least frictionally on the hinge member
Data Source
AI summary
A retaining device for a temporary connection to a hinge having an axis of rotation, including a holder assigned to a hinge member of the hinge. The holder includes a curved elongated hole and an eye. The eye is concentrically arranged to the axis of rotation. The eye includes an inner circumference for receiving a bolt defining the axis of rotation. The holder is configured as a one-piece part. The holder is detachable from the hinge and has a first side facing the hinge member. At least one projection extends from the first side of the holder and to an automobile hinge and to a method. A retaining device, an automobile hinge and a method provided by the at least one projection arranged directly adjacent to the inner circumference of the eye of the holder.