Electric Pump Attachment Surface Layout for Compact Mounting
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Solution Overview
Problem
Conventional electric pumps require a large attachment space due to the projection of attachment holes on the motor case, which increases the overall size and complexity of the pump assembly.
Innovation Solution
The electric pump design features a motor unit with a drive shaft and a pump unit positioned on one side, where the pump housing includes an attachment surface that extends in the axial direction, allowing for fluid flow paths and fixing locations within the motor housing's maximum outer shape, with flow path openings and fixing locations positioned on one side of the drive shaft, reducing the radial and axial size of the pump unit.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If attachment holes are provided on the motor case side surface, then the attachment space is reduced, but the attachment hole location projects greatly outward requiring large space for attaching the oil pump
Solution Approach 1:
The attachment surface is configured to extend in the axial direction (third dimension) rather than only in the radial direction. This allows attachment holes to be positioned within the axial range of the motor housing, preventing them from projecting greatly outward while still providing adequate attachment space for the oil pump.
Solution Approach 2:
The attachment surface is positioned asymmetrically on one side of the drive shaft rather than symmetrically distributed. This asymmetric positioning allows all attachment holes and flow path openings to be concentrated on one side, reducing the radial space requirement while maintaining functional requirements.
2Volume of moving object
If the pump unit is positioned on one side in axial direction, then the overall size is reduced, but the structural balance and stability may be affected
Solution Approach 1:
The pump unit is merged with the motor unit by positioning them adjacent to each other in the axial direction with shared structural elements. The pump housing is surrounded by the motor housing, creating an integrated assembly that reduces overall size while maintaining structural stability through the combined configuration.
Solution Approach 2:
The pump housing is nested within or adjacent to the motor housing structure, with the pump unit positioned in the axial direction within the overall housing arrangement. This nesting approach reduces the total volume while maintaining structural integrity through the hierarchical arrangement of components.
Data Source
AI summary
An electric pump includes a motor unit rotationally driving a drive shaft, and a pump unit. The pump unit includes a pump rotor that sends the fluid by a driving force of the driving shaft, and a pump housing that surrounds at least one side of the pump rotor. The pump housing includes an attachment surface extending in the axial direction and in contact with an attached body, first and second flow paths respectively on the suction side and the discharge side, and a fixing location within the attachment surface and fixed to the attached body by a fixing member within a maximum outer shape of the motor housing as viewed in the axial direction. Opening locations of the first and second flow paths are displaced from each other in the axial direction on the attachment surface.