Motor Vehicle Light Fastening Device with Decoupled Adjustment
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Solution Overview
Problem
Existing motor vehicle light fastening systems face challenges in allowing reliable adjustment of the installation position without unintentional changes during assembly and installation, leading to increased assembly costs and complexity.
Innovation Solution
A motor vehicle light fastening device featuring a banjo bolt with an external thread, a central opening, and a sleeve-shaped clamping part that can rotate, along with a collar and stop groove for torque support, prevents self-adjustment and ensures secure attachment without influencing the setting, using a decoupled adjustment fastening system.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a threaded bolt is used to fasten the motor vehicle light, then the light can be securely attached to the vehicle body, but the assembly process becomes complex and time-consuming
Solution Approach 1:
The hollow screw contains a threaded bolt inside its central opening, with the threaded bolt extending through the central opening. This nested configuration allows the threaded bolt to be pre-positioned within the hollow screw during assembly, enabling rapid installation while maintaining secure fastening capability through the external thread of the hollow screw.
2Manufacturing precision
If adjustment of the threaded bolt is allowed during assembly, then precise positioning can be achieved, but unintentional adjustment may occur leading to position changes
Solution Approach 1:
The threaded bolt is pre-positioned within the central opening of the hollow screw at the desired location before final assembly. The clamping part is then used to lock the threaded bolt in this pre-adjusted position, preventing any unintentional movement during subsequent assembly steps or installation processes.
Solution Approach 2:
The clamping part acts as an intermediary element between the hollow screw and the threaded bolt. It provides form-fitting engagement that secures the threaded bolt relative to the hollow screw, allowing precise positioning while preventing unintentional adjustment through its clamping action.
3Reliability
If a clamping part is added to prevent adjustment, then position stability is improved, but the device complexity increases
Solution Approach 1:
The hollow screw serves multiple functions: it provides the external thread for fastening the motor vehicle light to the body, contains the threaded bolt in its central opening, and works with the clamping part to secure the threaded bolt in position. This multi-functionality reduces the need for separate dedicated components, thereby limiting the increase in device complexity.
Data Source
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AI summary
A device (01) for at least partially fastening a motor vehicle light in a mounting opening of a motor vehicle body, a motor vehicle light equipped with such device, and a method for arranging and adjusting such a device on a motor vehicle light are described. The device comprises a hollow screw (02) with an external thread (21) and a central opening (22) extending coaxially to the longitudinal axis (20) of the hollow screw (02), a threaded bolt (03) that can be fixed to the motor vehicle light and has a first threaded section (31) extending through the central opening (22), and a sleeve-shaped clamping element (04) arranged coaxially between the hollow screw (02) and the threaded bolt (03) in the central opening (22) on the first threaded section (31).The hollow screw (02) has a radially projecting collar (23) arranged on one side of the external thread (21), which, in the assembled state of the device (01), faces the vehicle light. The clamping element (04) is rotatably arranged in the central opening (22). The clamping element (02) is arranged in a form-fitting manner in the axial direction parallel to the longitudinal axis (20). The clamping element (04) has a continuous axial opening (41) extending coaxially to the longitudinal axis (20), the inner diameter of which is smaller than the outer diameter of the first threaded section (31). The clamping element (04) includes a projection (42) which has a form that can be engaged with a tool in order to rotate the clamping element (04). At least one stop groove (24) is arranged in the collar (23) of the hollow screw (02). Furthermore, a stop (05) fixed to the vehicle light is provided, which engages in at least one stop groove (24) when the device (01) is mounted.The procedure involves first fixing the threaded bolt (03) on the vehicle light, then screwing the hollow screw (02) with the clamping part (04) arranged in its central opening (22) onto the first threaded section (31) with the collar (23) facing forward, until the stop (05) fixed on the vehicle light engages in a stop groove (24), and then adjusting the position of the hollow screw (02) along the threaded bolt (03) by rotating the clamping part (04) relative to the first threaded section (31).