Excavator Pump Compartment Filter Offset Design
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Solution Overview
Problem
Conventional hydraulic excavators face difficulties in filter replacement due to filters being placed at the same height, making it challenging to access and replace multiple filters efficiently, especially when space is needed under the filters.
Innovation Solution
The hydraulic excavator design optimizes filter placement by positioning at least two filters adjacent to each other with a space of the same size in the direction of removal, and offsetting them in the height direction within the pump compartment, allowing easier access and sufficient workspace for filter replacement, with the filter with the longest replacement period positioned farther back and those with shorter periods closer to the front.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If multiple filter devices are provided at the same height location on the inside of the openable door, then the filters are easily accessible for inspection and maintenance, but the replacement work becomes more difficult when space is needed under the filters
Solution Approach 1:
The patent transitions from a two-dimensional arrangement (same height location) to a three-dimensional arrangement by offsetting filters in the height direction. This vertical stacking creates sufficient horizontal clearance for tool access and filter removal while maintaining overall compactness within the pump compartment.
Solution Approach 2:
The patent segments the filter devices into different vertical levels within the pump compartment. By dividing the filter arrangement into multiple height positions, each filter gains adequate clearance space for removal operations without compromising the accessibility provided by the openable door.
2Area of stationary object
If multiple filter devices are disposed adjacent to each other, then space utilization is improved, but the replacement work becomes more difficult due to lack of workspace
Solution Approach 1:
The patent utilizes the vertical dimension by offsetting filters in the height direction, allowing adjacent filters to be positioned at different elevations. This creates sufficient horizontal clearance for tool access and filter removal while maintaining compact horizontal footprint and efficient space utilization within the pump compartment.
3Ease of operation
If filters are positioned closer to the front for easier access, then accessibility is improved, but the filter with longest replacement period cannot be positioned optimally
Solution Approach 1:
The patent applies different spatial characteristics to different filters based on their replacement frequency. Filters requiring frequent replacement are positioned at the front outer peripheral side for easy access, while the filter with the longest replacement period is positioned farther back, optimizing the overall replacement workflow by considering the specific needs of each filter type.
Data Source
AI summary
A hydraulic excavator is provided with a lower traveling unit, an upper structure, an engine, a hydraulic pump, an engine compartment, a pump compartment and a plurality of filter devices. The upper structure is rotatably disposed on the lower traveling unit. The pump compartment provided on the upper structure for housing the hydraulic pump. The pump compartment has a door that allows access to an interior of the pump compartment. The filter devices, which are disposed adjacent to each other, are disposed at positions that are mutually offset in a height direction of the hydraulic excavator.