Rollover Protection Mount Transverse Screw Fastening
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Solution Overview
Problem
The existing motor vehicle rollover protection systems have a narrow base due to receptacles designed for form-fitting brackets, leading to a small material thickness and a lever arm effect that compromises the distribution of forces during a rollover event.
Innovation Solution
A wider mount design with screws aligned in the transverse direction and a spar-like section that includes a closed hollow profile for increased stiffness, along with internal threads and reinforcement, to create a stable and efficient force distribution system.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If receptacles are designed for form-fitting brackets, then the connection is compact, but the base area is small and material thickness must be increased
Solution Approach 1:
The invention transitions from a narrow X-directional connection to a wide Y-directional connection by orienting screws transversely across the vehicle width. The receptacle base extends in the Y-direction rather than the X-direction, fundamentally changing the dimensional orientation of the support structure to achieve both compactness and large base area.
2Ease of manufacture
If screws are arranged in the X-direction, then the connection is simple, but a lever arm is created that compromises force distribution
Solution Approach 1:
Instead of arranging screws in the conventional X-direction (longitudinally), the invention inverts the arrangement by placing screws in the Y-direction (transversely). This inversion eliminates the lever arm effect because the screw axis is now perpendicular to the force direction, creating optimal force distribution during rollover events.
3Area of stationary object
If the mount is made wider, then the support base is broader and material thickness can be reduced, but the structure becomes more complex
Solution Approach 1:
The mount structure is segmented into distinct functional elements: the receptacle base, the bar-like stiffening section with internal cavity, and the bracket mounting area. This segmentation allows each component to be optimized independently - the base provides width, the bar-section provides stiffness with reduced material, and the bracket area provides mounting functionality.
4Strength
If material thickness is increased, then the body section can support the load, but the overall vehicle weight increases
Solution Approach 1:
The invention changes the geometric parameters of the mount structure - specifically extending the base area in the Y-direction and adding a bar-like section with internal cavity. These parameter changes increase the moment of inertia and structural stiffness, allowing thin-walled construction that maintains high load capacity while minimizing material usage and weight.
Data Source
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AI summary
A motor vehicle (2) having a rollover protection system (8) has at least one rollover supporting body (10). For the connection of the rollover supporting body (10) to the body structure of the motor vehicle (2), a broad-based receiving portion (16) is provided in the area of a rear wheel housing (5) and/or in the area of a side panel region (6). The fastening is performed by means of screws (14), which are oriented in the transverse direction of the motor vehicle (2). Favorable force application in the event of a rollover of the motor vehicle (2) thereby results.