A drive motor (1) for an eco-friendly vehicle according to the present invention includes: a hollow motor shaft (16-1) which is coupled to a magnet (14-2) surrounded by a stator (14-1) to which a current is supplied, in which both sides of the hollow motor shaft (16-1) are supported by bearings; a coolant channel (30) forming an outer circulation path of coolant around a motor housing (11) surrounding the stator (14-1); and an oil path (20) in which the temperature of oil decreases by heat exchange between an oil and the coolant in a motor internal space defined by a motor cover (12-1) and a reducer cover (12-2) that are coupled to respective left and right sides of the motor housing (11). The motor cooling performance can be improved without using an oil cooler. Especially, since the cooling performance can be improved, an oil lubricating bearing having a significantly higher permissible speed than that of a dry bearing can be used as a bearing for supporting the motor shaft (16-1), so a high-speed motor can be achieved and the durability can be improved.
본 발명의 환경차량용 구동모터(1)에는 전류가 공급되는 스테이터(14-1)로 감싸인 마그네트(magnet)(14-2)와 결합되어 양쪽부위가 베어링으로 지지된 중공의 모터 축(16-1), 스테이터(14-1)를 감싸는 모터하우징(11)의 둘레로 냉각수의 외부순환을 형성하는 냉각수 채널(30), 모터하우징(11)의 좌우 양쪽으로 각각 결합된 모터 커버(12-1)와 감속기 커버(12-2)로 형성된 모터내부공간에서 냉각수와 열교환으로 온도를 낮추는 오일 패스(20)가 포함됨으로써 오일 쿨러의 사용 없이도 모터냉각성능을 향상하고, 특히 냉각성능 향상으로 모터 축(16-1)의 지지용 베어링이 건식 베어링 대비 현저히 높은 허용속도를 갖는 오일 윤활 베어링으로 적용됨으로써 모터 고속화 및 내구성능 강화도 이루어지는 특징을 갖는다.
Coolant Heat Exchange Cooling type Drive Motor and Echo Vehicle thereby
냉각수 열교환 냉각방식 구동모터 및 환경차량
2018-06-26
Patent
Electronic Resource
Korean
Coil Muti Cooling Paths type Drive Motor and Echo Vehicle thereby
European Patent Office | 2022
Coil Muti Cooling Paths type Drive Motor and Echo Vehicle thereby
European Patent Office | 2019
|Oil Coil Circulation type Drive Motor and Echo Vehicle thereby
European Patent Office | 2022
Oil Coil Circulation type Drive Motor and Echo Vehicle thereby
European Patent Office | 2019
|Drive motor cooled by heat exchange with coolant and eco-friendly vehicle using the same
European Patent Office | 2020
|