Upper Slewing Body Vibration Isolation via Deck Segmentation
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Solution Overview
Problem
The existing upper slewing body design for construction machines transmits engine vibration to the cab, affecting operator comfort due to inadequate vibration isolation.
Innovation Solution
Incorporating a slewing frame, engine deck, cab deck, tank deck, and a vibration transmission regulating unit that creates a gap between the engine deck and tank deck to disrupt direct vibration transmission, using a configuration where the engine deck and tank deck are fixed to the slewing frame and arranged to intersect in the front-rear and lateral directions, with a gap formed between them to cut off vibration paths.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the engine deck and tank deck are directly connected without a gap, then the structural rigidity is improved, but vibration from the engine is transmitted to the cab through the deck
Solution Approach 1:
The deck structure is segmented into engine deck, tank deck, and cab deck as separate components. A gap is intentionally created between the engine deck and tank deck to interrupt the vibration transmission path while maintaining structural integrity through the slewing frame connection points.
Solution Approach 2:
The gap between the engine deck and tank deck acts as an intermediary element that blocks vibration transmission. This gap prevents direct mechanical coupling between the engine-mounted deck and the tank-deck-cab assembly, thereby reducing vibration propagation to the cab.
2Object-affected harmful factors
If a gap is created between the engine deck and tank deck to reduce vibration, then vibration transmission is suppressed, but structural rigidity may be reduced
Solution Approach 1:
The deck is divided into separate segments (engine deck, tank deck, cab deck) with controlled gaps between them. This segmentation allows vibration isolation while the overall structure maintains rigidity through the slewing frame and strategic connection points.
Solution Approach 2:
The gap is introduced only in specific locations where vibration transmission occurs, rather than throughout the entire structure. The engine deck remains rigidly connected to the slewing frame, and the tank deck and cab deck maintain their connections, ensuring localized vibration suppression without compromising overall structural integrity.
Data Source
AI summary
Transmission of vibration from an engine to a cab is suppressed. An upper slewing body includes a slewing frame, an engine deck, a cab deck, a tank deck, and a vibration transmission regulating unit. The tank deck is arranged on the more laterally outer side than the slewing frame and is fixed to the slewing frame. The tank deck is arranged forward of the engine deck and is arranged rearward of the cab deck. The vibration transmission regulating unit is provided between the engine deck and the tank deck to regulate direct transmission of vibration from the engine deck to the tank deck, the vibration occurring as the engine operates.