Oil Strainer Layout for Compact Transverse Drive Pumps
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Solution Overview
Problem
Conventional drive devices with oil pumps in transverse posture face complex oil passage configurations and increased space requirements due to the change in oil path orientation from vertical to horizontal, leading to inefficiencies and potential complications in oil circulation and filtration.
Innovation Solution
The drive device incorporates a strainer with a suction port oriented downward and a discharge port intersecting the vertical direction, positioned in the suction path between the oil sump and oil pump, which allows for a simpler and more compact configuration of the oil passage, effectively trapping foreign substances and maintaining efficient oil circulation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the oil pump is provided in the transverse posture with its central axis extending in the horizontal direction, then the oil pump can be installed in certain spatial configurations, but the oil passage path becomes complicated and requires larger space
Solution Approach 1:
The strainer is designed with a tilted installation angle relative to the horizontal plane, creating a three-dimensional oil passage path that efficiently connects the vertically downward suction port to the horizontally oriented discharge port. This dimensional approach resolves the contradiction by using spatial orientation to simplify the overall passage layout while maintaining pump installation flexibility
2Volume of moving object
If the oil pump is provided in the transverse posture, then the pump can be positioned in the housing, but the oil passage path changes from vertical to horizontal direction requiring larger space
Solution Approach 1:
By tilting the strainer at an optimal angle, the invention creates a compact three-dimensional oil passage that maintains efficient vertical-to-horizontal flow transition without requiring excessive horizontal space, thus resolving the contradiction between space utilization and flow efficiency
3Volume of moving object
If the suction port opens downward and discharge port opens in intersecting direction, then the strainer configuration becomes compact, but the orientation complexity increases
Solution Approach 1:
The strainer body is designed with a specific tilt angle that optimally orients the suction and discharge ports in three-dimensional space. This angular configuration compactly positions both ports while maintaining simple internal flow paths, resolving the contradiction between compactness and orientation simplicity
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 simplifies the oil passage layout, reduces space requirements, and stabilizes oil flow, enhancing the lubrication and cooling efficiency while preventing bubble contamination, thus improving the overall performance and compactness of the drive device.
Implementation Method 1
a suction path that connects the oil sump and the oil pump... The suction port opens downward in the vertical direction
Data Source
AI summary
A drive device includes a motor, a housing, an oil passage in the housing, an oil pump in which a portion of the oil passage is provided, and a strainer inside the housing and in which a portion of the oil passage is provided. The oil passage includes an oil sump in which oil is accumulated and a suction path connecting the oil sump and the oil pump. A central axis of the oil pump extends in a direction intersecting the vertical direction. The strainer is in the suction path. The strainer includes a suction port to suction oil from the oil sump, a discharge port to discharge oil toward the oil pump, and a filter. The suction port opens downward in the vertical direction. The discharge port opens in a direction intersecting the vertical direction toward the oil pump.