Vehicle Trim Cladding Gap Closure for Noise Insulation
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Solution Overview
Problem
Multi-part vehicles, such as articulated buses and trams, face noise intrusion due to a gap between the bellows covering and the articulated floor, which existing solutions like brushes fail to effectively close, leading to inadequate soundproofing and an unfavorable appearance.
Innovation Solution
A two-part cladding system where a second, invisible part is attached to the first part near the ground, closing the gap between the cladding and the floor, ensuring permanent noise reduction without compromising aesthetics, using materials with soundproofing and fire-retardant properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the gap between the bellows and the floor is left open, then the bellows material is not excessively worn, but noise enters from the outside and soundproofing is reduced
Solution Approach 1:
The cladding is divided into two distinct parts: a first part (bellows) that maintains visibility and aesthetic appearance, and a second part that is essentially invisible from the interior and closes the gap to the floor. This segmentation allows each part to serve its specific function - the first part protects against wear while the second part provides soundproofing by closing the noise path.
Solution Approach 2:
The solution extends the cladding coverage into the previously uncovered vertical dimension near the floor. The second part of the cladding reaches down to close the gap between the bellows and the floor, effectively filling the three-dimensional space that was previously open and creating a complete sound barrier.
2Object-affected harmful factors
If brushes are used to close the gap, then the gap is closed, but the brushes wear out, do not offer significantly better sound insulation, and look unfavorable
Solution Approach 1:
Instead of using brushes that wear out quickly, the invention employs a durable cladding structure made of long-lasting materials. The cladding parts are designed to remain effective throughout the service life of the vehicle, eliminating the need for frequent replacement associated with brush solutions.
Solution Approach 2:
The cladding system uses materials that combine durability with sound-insulating properties. The fabric or skin material of the bellows is complemented by the second cladding part, creating a composite structure that provides both mechanical strength and acoustic protection.
3Object-affected harmful factors
If the bellows partially reaches the floor due to sagging, then the gap is reduced, but the bellows material rests heavily on itself and no permanent improvement in noise protection is achieved
Solution Approach 1:
The second part of the cladding is installed in advance to prevent the bellows material from sagging and resting heavily on itself. This additional cladding layer provides structural support that maintains the bellows in its intended position, preventing premature wear and maintaining consistent soundproofing performance.
Solution Approach 2:
The second part of the cladding acts as an intermediary element between the bellows and the floor. It provides the necessary support and gap closure without requiring the bellows material itself to bear the additional stress of reaching the floor, thus maintaining structural integrity.
4Object-affected harmful factors
If the bellows reaches the floor heavily, then the gap is closed, but the visual appearance is extremely unfavorable and a bad impression is conveyed
Solution Approach 1:
Different parts of the cladding system have different visual qualities: the first part (bellows) is designed to be visible and aesthetically pleasing from the interior, while the second part is essentially invisible and functional. This local differentiation allows the visible portion to maintain aesthetic appeal while the hidden portion provides the necessary gap closure.
Solution Approach 2:
Instead of making the entire cladding visible and aesthetic, the invention inverts the approach by making the functional gap-closing part (second cladding part) invisible and the aesthetic part (first cladding part) visible. This inversion ensures that the visual appearance is not compromised while achieving effective gap closure.
Data Source
Figure 1
AI summary
The invention relates to a vehicle with bodywork. The invention relates to a vehicle 1 with bodywork, wherein the vehicle 1 has at least two vehicle parts which are movably connected to each other by means of a transition area, and the transition area has a bodywork 3, 4, 6, 7 on the sides, which is constructed such that there is no gap between the bodywork 6, 7 and the floor 12 of the transition area and thereby permanently improves the sound insulation.