In-wheel motor system
a technology of in-wheel motors and motors, which is applied in the direction of electric propulsion mountings, electric sub-unit features, electric devices, etc., can solve the problems of motors that motors that cannot achieve the cooling effect of vehicle-induced wind, and the oil tank cannot be efficiently cooled down. , to achieve the effect of minimizing the size of the oil tank, efficient arrangement and improving cooling performan
Active Publication Date: 2014-05-15
HYUNDAI MOBIS CO LTD
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Benefits of technology
The present invention is about an in-wheel motor system that includes an oil tank and an oil pump. The system is designed to minimize the size of the oil tank and improve cooling performance. The oil pump is independently driven regardless of the speed of the wheel. This allows for better cooling efficiency. The technical effects of this design are improved performance and efficiency of the in-wheel motor system.
Problems solved by technology
The mechanical oil pump has a problem in that the oil pump can circulate oil when the vehicle is moved forward, but cannot circulate oil when the vehicle is moved backward.
Therefore, when excessive heat is generated from the motor at a low speed (for example, when the vehicle travels on a climbing lane for a long time), the motor may not be efficiently cooled down.
Since the position of the oil tank storing oil is blocked by the surrounding parts, the oil tank cannot obtain a cooling effect by vehicle-induced wind.
Method used
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[0038]Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. First of all, we should note that in giving reference numerals to elements of each drawing, like reference numerals refer to like elements even though like elements are shown in different drawings. It should be understood that although exemplary embodiment of the present invention are described hereafter, the spirit of the present invention is not limited thereto and may be changed and modified in various ways by those skilled in the art.
[0039]FIG. 1 is a perspective view of an in-wheel motor system according to an exemplary embodiment of the present invention, when seen from inside a vehicle to outside, FIG. 2 is a cross-sectional view taken along line II-II of FIG. 1, FIG. 3 is a perspective view of main parts including an in-wheel motor of FIG. 1, FIG. 4 is a block diagram illustrating a flow of cooling oil provided to the in-wheel motor of FI...
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Disclosed is an in-wheel motor system including: an in-wheel motor mounted inside a wheel and generating a driving force; an oil pump provided adjacent to the in-wheel motor and supplying cooling oil into the in-wheel motor; and an oil tank provided under the in-wheel motor and collecting cooling oil discharged from the in-wheel motor, wherein the oil pump and the oil tank are arranged at a lower end of the in-wheel motor and between the in-wheel motor and a steering tie-rod in a longitudinal direction of a vehicle so as to be located at a more inner position than a knuckle in a widthwise direction of the vehicle. In the in-wheel motor system, the oil tank and the oil pump may be efficiently arranged to minimize the size of the oil tank and to improve the cooling performance.
Description
CROSS-REFERENCE TO RELATED APPLICATIONS[0001]This application claims priority to and the benefit of Korean Patent Application No. 10-2012-0127394 filed in the Korean Intellectual Property Office on Nov. 12, 2012, the entire contents of which are incorporated herein by reference.TECHNICAL FIELD[0002]The present disclosure relates to an in-wheel motor system, and more particularly, to a cooling structure of an in-wheel motor system capable of minimizing the size of an oil tank and improving cooling performance by efficiently arranging the oil tank and an oil pump in the in-wheel motor system having an in-wheel motor mounted therein.BACKGROUND ART[0003]An in-wheel motor system refers to a vehicle driving system having a motor positioned inside a wheel, the motor generating a driving force.[0004]The in-wheel motor system includes an in-wheel motor, a cooling device to cool down the in-wheel motor, a decelerator to transmit a driving force to the wheel, a brake system to generate a braki...
Claims
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IPC IPC(8): B60K7/00
CPCB60K7/00B60K7/0007B60K17/043B60K2001/006B60K2007/0038B60K2007/0061H02K9/19B60L1/003B60L3/0061B60L2220/44B60L2240/36B60L2240/425B60L2220/50B60Y2306/03B60K11/02Y02T10/64
Inventor KIM, DONG HYUN
Owner HYUNDAI MOBIS CO LTD