Drive device
By placing the cooler in the power transmission device in the fluid delivery path of the pump to the motor housing and overlapping with the gear housing and the motor protrusion, the problem of the oil cooler causing the device to be larger is solved, and the driving device is miniaturized.
CN119654775APending Publication Date: 2025-03-18NIDEC CORP(JP)
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Patent Information
- Application Number
- CN202380058016.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Priority Date
- 2022-12-27
- Filing Date
- 2023-08-08
- Publication Date
- 2025-03-18
AI Technical Summary
Technical Problem
In the existing power transmission device, the oil cooler is installed on the outer surface of the housing, resulting in the device being larger.
Method used
A drive device is designed in which the cooler is arranged in a portion that conveys fluid from the pump to the inside of the motor housing, at least a portion of the cooler overlaps the gear housing in an axial perpendicular direction and overlaps the protrusion of the motor in the axial direction.
Benefits of technology
With this design, the drive device with a cooler can be reduced in size, preventing the cooler from protruding, and thus reducing the size of the device.
✦ Generated by Eureka AI based on patent content.
Abstract
The drive device includes: a motor body; a gear mechanism; a housing having a motor housing in which the motor main body is housed, a gear housing in which the gear mechanism is housed and which is positioned on one side of the motor housing in the axial direction, and a reservoir in which a fluid is stored; a pump that conveys the fluid in the reservoir to the inside of the motor housing; a flow path which connects at least the pump and the interior of the motor housing and through which a fluid flows; and a cooler disposed in a portion of the flow path between the pump and the transfer of fluid to the inside of the motor housing. A motor having a motor body and a motor housing is configured. A portion of the motor overlaps the gear housing in the axial direction. The motor has a protruding portion that protrudes radially outward from the gear housing when viewed in the axial direction. At least a portion of the cooler overlaps the gear housing in a predetermined direction perpendicular to the axial direction, and overlaps the protruding portion in the axial direction.
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