Integrated Housing Cover for External Pump-Motor Sealing
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Solution Overview
Problem
Existing pump-motor units for motor vehicles require a fitting well for protection, leading to increased space and weight, as well as higher development costs due to the need for precise and cost-intensive sealing and surface treatments.
Innovation Solution
A pump-motor unit design featuring a housing with a housing cover, intermediate housing structure, and motor cover that defines a delivery chamber, allowing for external mounting without a fitting well, using a fitting structure for connection and employing a delivery device with a drive motor and drive shaft for fluid delivery, with integrated seals and a compact design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a fitting well is used to protect the pump-motor unit from environmental influences, then protection and sealing are improved, but space requirement and weight increase
Solution Approach 1:
The housing cover is designed to perform multiple functions simultaneously: it protects the pump-motor unit from environmental influences, provides sealing through integrated sealing surfaces, and serves as the mounting structure for external attachment. This consolidation eliminates the need for a separate fitting well, reducing overall weight and space while maintaining protection and sealing effectiveness.
2Reliability
If a fitting well with precise sealing surfaces is used, then sealing performance is improved, but manufacturing cost increases
Solution Approach 1:
The sealing surfaces are integrated directly into the housing cover structure, eliminating the need for separate precision-machined fitting well surfaces. The housing cover itself provides the sealing interface through its design, reducing manufacturing complexity and cost while maintaining adequate sealing performance for the application.
3Reliability
If a multi-part housing is used to protect exterior pump-motor unit, then protection from environmental influences is improved, but device complexity and number of components increase
Solution Approach 1:
The housing cover is designed as a single integrated component that combines the protective enclosure, sealing surfaces, and mounting structure into one piece. This eliminates the need for multiple separate housing parts and assembly steps, reducing device complexity while providing comprehensive protection from environmental influences.
4Reliability
If a fitting well structure is used, then sealing off from environment is improved, but space requirement of consumer housing increases
Solution Approach 1:
The housing cover integrates the sealing and protection functions directly into the pump-motor unit assembly, eliminating the need for a separate fitting well structure in the consumer housing. This reduces the space requirement of the consumer housing while maintaining effective sealing off from the environment through the housing cover's integrated design.
Data Source
AI summary
A pump-motor unit for delivering a fluid, for example gear oil and/or lubricating oil in motor vehicles, includes: a housing having a housing cover, an intermediate housing structure and a motor cover, wherein the housing cover and the intermediate housing structure define a delivery chamber axially on both end-facing sides and circumferentially in the radial direction; a delivery device featuring a delivery member, which can be rotated within the delivery chamber, for delivering the fluid; and a drive motor which is connected to the delivery device via a drive shaft, wherein the housing cover forms an accommodating well, and the drive motor and the intermediate housing structure are arranged in the accommodating well.