Cabin Rear Pillar Venting and Resonator Noise Reduction
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Solution Overview
Problem
Existing cabin designs for working machines lack effective ventilation and noise reduction mechanisms, leading to poor interior comfort and increased component costs.
Innovation Solution
The design incorporates a hollow rear pillar with a movable lid for ventilation, an integrated resonator in the roof to reduce booming noises, and a unique frame structure with curved upper frames for improved sealing and strength, along with an outside-air filter system to enhance air quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a quarter glass is used for ventilation, then ventilation function is provided, but device complexity and cost increase
Solution Approach 1:
The invention extracts the ventilation function from the traditional quarter glass component and relocates it to the rear pillar. The rear pillar includes a movable lid that can open and close to provide ventilation, while the quarter glass is eliminated entirely. This separation of functions simplifies the overall structure by removing the unnecessary quarter glass component while maintaining the ventilation capability through the rear pillar's lid mechanism.
2Strength
If traditional cabin structure is used, then structural strength is maintained, but sealing performance deteriorates
Solution Approach 1:
The invention applies curved surfaces to the upper frames of the cabin structure. The front upper frame, rear upper frame, and side upper frames all feature curved configurations that improve the sealing performance between adjacent components. The curved surfaces allow for better contact and sealing between the frames and the cabin body, enhancing overall sealing effectiveness while maintaining structural integrity.
3Ease of manufacture
If simple frame structure is used, then manufacturing cost is reduced, but sealing performance deteriorates
Solution Approach 1:
The curved frame design provides improved sealing performance without significantly complicating the manufacturing process. The curvature is integrated into the frame structures in a way that can be achieved through standard forming techniques, balancing manufacturing feasibility with enhanced sealing capabilities between the frames and cabin body.
4Object-affected harmful factors
If resonator is added to reduce noise, then noise reduction is achieved, but device complexity increases
Solution Approach 1:
The resonator is integrated into the existing cabin structure, specifically incorporated within the frame system. This merging of the noise reduction function into the structural framework allows the resonator to perform its noise-cancelling function without requiring separate, additional components, thereby reducing overall device complexity while still achieving effective noise reduction.
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 configuration provides improved ventilation without the need for a quarter glass, reduces noise levels, enhances interior comfort, and reduces component costs by simplifying the structure and improving sealing performance.
Implementation Method 1
the cabin has a resonator configured to reduce 'booming noises' generated inside the cabin
Implementation Method 2
includes a biasing member to press the lid in a direction from the opening position toward the closing position
Data Source
AI summary
To improve a view of a side area from a cabin, the cabin mounted on a machine body includes a hollow rear pillar located on a rear portion of a side surface of the cabin. The rear pillar includes an interior opening through which an interior of the rear pillar is communicated with an interior of the cabin, and an exterior opening through which the interior of the rear pillar is communicated with an exterior of the cabin.