Integrated Motor Unit Oil Cooling Pump Design
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Solution Overview
Problem
The existing motor units for vehicles face challenges in mounting due to their complex outer shape, leading to potential dead space issues.
Innovation Solution
A motor unit design that includes a motor with a rotating shaft, a gear section, a housing with separate chambers for the motor and gear, and an oil passage for cooling, where a pump is integrated within the housing to supply and circulate oil for cooling and lubrication, reducing the overall size and complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a complex outer shape is used for the motor unit, then the gear ratio can be maintained, but dead space is generated when mounted on a vehicle
Solution Approach 1:
The pump is integrated within the housing of the motor unit, merging the pump function into the existing structure. This eliminates the need for separate pump housing and reduces dead space while maintaining the gear ratio functionality through the unified design of motor, gear section, and pump assembly.
2Reliability
If cooling and lubrication functions are added to the motor unit, then performance is improved, but device complexity increases
Solution Approach 1:
The oil passage serves multiple functions: it provides cooling for the motor and gear section, enables lubrication of moving parts, and facilitates pump operation. This multi-functionality approach integrates cooling and lubrication systems into the existing hydraulic structure, improving reliability without significantly increasing device complexity.
Solution Approach 2:
The pump is housed within the motor unit housing, merging what could be separate components into a single integrated assembly. This reduces overall structural complexity while providing essential cooling and lubrication functions through the unified oil circulation system.
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 design reduces the size and complexity of the motor unit, minimizing dead space and enhancing cooling efficiency while maintaining a desired gear ratio, thus facilitating easier mounting and operation.
Implementation Method 1
an oil passage along which an oil circulates for cooling the motor
Implementation Method 2
A pump that supplies the oil to the motor is provided in a channel of the oil passage. The pump has a pump motor.
Data Source
AI summary
The motor unit includes: a motor having a motor shaft that rotates around a motor axis extending along a horizontal direction; a gear section connected to the motor shaft on one side of the motor shaft in an axial direction; a housing that houses the motor and the gear section; and an oil contained in the housing. The housing includes a motor housing section that has inside a motor chamber for housing the motor, and a gear housing section that has inside a gear chamber for housing the gear section. The housing is provided with an oil passage along which the oil circulates for cooling the motor. A pump that supplies the oil to the motor is provided in a channel of the oil passage. The pump has a pump motor. A rotation axis of the pump motor is parallel to the motor axis.