Integrated Bearing Rings in Engine Coolant Pump
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Solution Overview
Problem
Existing mechanical coolant pumps for internal combustion engines require complex and precise press-fitting of roller bearings, leading to high assembly effort and a larger outer diameter of the driving wheel, which is inefficient and costly.
Innovation Solution
A mechanical coolant pump design where the stationary cylindrical support body integrally comprises both the inner and outer rings of the roller bearings, eliminating the need for separate press-fitting and allowing for a more compact and lightweight pump with reduced outer diameter.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If separate roller bearings are press-fitted onto the driving wheel and shaft, then the pump can be assembled with standard components, but the assembly effort increases and manufacturing precision requirements increase
Solution Approach 1:
The patent merges the bearing support function directly into the driving wheel and shaft by integrating bearing races into these components. This eliminates the need for separate roller bearings and press-fitting operations, thereby reducing assembly complexity while maintaining ease of manufacture through simplified assembly processes
2Ease of manufacture
If separate roller bearings are used for the driving wheel and shaft, then the pump can utilize ready-made components, but the outer diameter of the driving wheel increases to over 9-10 cm
Solution Approach 1:
The patent integrates the bearing support function directly into the driving wheel and shaft structures, eliminating the need for separate bearing assemblies. This merging approach significantly reduces the outer diameter of the driving wheel from over 9-10 cm to a more compact size, while still allowing for practical manufacturing through the simplified integrated design
3Device complexity
If the cylindrical supporting body integrally comprises bearing rings, then the assembly process is simplified and outer diameter is reduced, but the manufacturing complexity of the support body increases
Solution Approach 1:
The patent integrates the bearing support function directly into the driving wheel and shaft by incorporating bearing races into these components. This merging eliminates the need for separate bearing assemblies and press-fitting operations, thereby simplifying the assembly process while the integrated design allows for practical manufacturing through streamlined production methods
Data Source
AI summary
A mechanical combustion engine coolant pump for pumping a coolant for an internal combustion engine includes a stationary cylindrical support body. A rotatable driving wheel is supported by a driving wheel roller bearing at the stationary cylindrical support body. The rotatable driving wheel is configured to be driven by the internal combustion engine. A pump wheel is arranged at a rotatable rotor shaft. The pump wheel is supported by a shaft roller bearing at the stationary cylindrical supporting body. A switchable friction clutch is configured to couple the rotatable driving wheel with the pump wheel. The stationary cylindrical support body integrally comprises an inner ring of the driving wheel roller bearing. The stationary cylindrical support body integrally comprises an outer ring of the shaft roller bearing.