Water Pump Unit Attachment Surface Orientation for Engine Assembly
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Solution Overview
Problem
Existing water pump units require large openings and complex assembly processes due to their attachment to power supply devices, particularly internal combustion engines, which complicates the joining operation and increases the size of the attachment surface.
Innovation Solution
A water pump unit design featuring a water pump case with a drive shaft and a power transmission member, such as a driven gear, where the attachment surface extends along the power transmission member, allowing for a reduced attachment surface size and simplified assembly by using fixing bolts that adjust the intermeshing engagement between gears.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the water pump unit is attached to the vertical wall of the oil pan with a conventional design, then the water pump unit can be installed on the power supply device, but the attachment surface area is enlarged and a large opening must be formed in the oil pan
Solution Approach 1:
The attachment surface is repositioned from a vertical orientation on the oil pan wall to a horizontal orientation on the bottom surface of the oil pan. This dimensional change allows the attachment surface to extend along the power transmission member in the radial direction, reducing the required opening size in the vertical wall while maintaining adequate attachment area.
2Reliability
If the water pump unit is attached to the oil pan with a conventional design, then the water pump can be installed, but the assembling operation becomes complicated due to the drive shaft being disposed within the crankcase
Solution Approach 1:
The drive shaft is extracted from the crankcase interior and repositioned to extend from the bottom surface of the oil pan outward. This extraction simplifies the assembly process by allowing the drive shaft to be accessed and connected from the exterior, eliminating the complexity of working within the confined crankcase space.
3Reliability
If a large opening is formed in the oil pan for the water pump unit, then the water pump unit can be attached, but the rigidity of the power supply device is reduced
Solution Approach 1:
The attachment surface is repositioned from a vertical orientation on the oil pan wall to a horizontal orientation on the bottom surface of the oil pan. This dimensional change allows the attachment surface to extend along the power transmission member in the radial direction, reducing the required opening size in the vertical wall while maintaining adequate attachment area.
Data Source
AI summary
A water pump unit has, within a water pump case, a drive shaft for driving an impeller, and a transmission member for transmitting power of a power supply device to the drive shaft. The water pump unit is configured such that the water pump case receives therein and supports the drive shaft, the transmission member is supported by the water pump case by means of the drive shaft with a part of the transmission member protruding from within the water pump case, and an attachment surface of the water pump case, for joining the water pump case to the power supply device, is formed to extend along the transmission member.