Vehicle Rear Holding Assembly With Integral Welded Connection
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Solution Overview
Problem
The challenge in holding devices for motor vehicles is to create a stable and cost-effective connection between the receiving body and the connection arm.
Innovation Solution
The receiving body is connected to the connection arm by a connecting body that is integrally formed in one piece, utilizing methods such as pressure welding, friction welding, and friction stir welding to ensure a stable and efficient connection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the receiving body is connected to the connection arm by a separate connecting component, then the connection can be made with different materials, but the manufacturing complexity and cost increase
Solution Approach 1:
The connecting body is integrally formed in one piece with the connection arm, merging two previously separate components (connection arm and connecting body) into a single monolithic structure. This eliminates the need for separate connecting components while maintaining the ability to connect different materials through the integrated design.
Solution Approach 2:
The integrally formed connecting body serves multiple functions: it acts as both the connection arm structure and the connecting interface, eliminating the need for separate connecting components. This multi-functional design reduces overall complexity while maintaining material compatibility for connecting the receiving body.
2Reliability
If traditional welding methods are used to connect the receiving body and connecting body, then a stable connection is achieved, but the welding time and manufacturing cost increase
Solution Approach 1:
The patent employs friction welding, which utilizes mechanical vibration and rotational motion to generate friction heat at the interface between the receiving body and connecting body. This vibrational friction process rapidly heats and fuses the materials, achieving stable connections with significantly reduced welding time compared to traditional methods.
Solution Approach 2:
The friction welding process induces phase transitions in the material at the contact interface, where friction heat melts the materials temporarily, and upon cessation of rotation, the molten materials solidify to form a strong bond. This phase change mechanism enables rapid and reliable joining.
3Productivity
If the receiving body is provided as a finished body with a weld lug, then friction welding can be realized efficiently, but the manufacturing complexity of the receiving body increases
Solution Approach 1:
The weld lug is pre-formed as an integral part of the receiving body during its primary manufacturing process, rather than being added as a separate component later. This preliminary formation of the welding interface simplifies the overall manufacturing workflow and enables efficient friction welding without requiring additional assembly steps.
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
This approach allows for a stable and efficient connection between the receiving body and the connection arm, utilizing materials like steel, with reduced welding time and cost, ensuring durability and reliability.
Implementation Method 1
the receiving body and the connecting body are connected to one another by friction welding
Implementation Method 2
the receiving body is connected to the connecting body by rotary friction welding, since rotary friction welding is a particularly advantageous form of friction welding in respect of efficiency and the time required
Data Source
AI summary
In order to improve holding device that is mountable on a rear region of the body of a motor vehicle, comprising a pivotal bearing unit, which is mountable in a manner fixed to the vehicle on the rear region of a motor vehicle, in particular a passenger car, by a carrier unit, and on which a pivot element that carries an attachment element is mounted to pivot about a pivot axis running transversely, in particular obliquely, to a longitudinal center plane and is thus pivotal from a working position to a rest position and vice versa, wherein by way of a connection arm the pivot element is provided with an attachment element carrier that has an insertion receptacle in which an attachment element is insertable and fixable with positive engagement by an end region, wherein in the working position the insertion receptacle extends with its center axis substantially parallel to the longitudinal center plane, and wherein the attachment element carrier comprises a receiving body that has the insertion receptacle, the improvement being such that the receiving body is fixed to the connection arm as inexpensively as possible, it is proposed that the receiving body should be connected to the connection arm by a connecting body that is integrally formed in one piece with the connection arm.