A liquid-cooled motor device includes a motor casing, a motor, a coolant casing and an impeller. The motor casing receives the motor, and defines a cooling space surrounding the retaining space, a coolant intake hole, and a coolant draining hole. The coolant casing defines a drawing space, a coolant
A liquid-cooled motor device includes a motor casing, a motor, a coolant casing and an impeller. The motor casing receives the motor, and defines a cooling space surrounding the retaining space, a coolant intake hole, and a coolant draining hole. The coolant casing defines a drawing space, a coolant inlet and a coolant outlet. The impeller is disposed in the drawing space and connected to an output shaft of the motor, and is rotated by the output shaft to draw a coolant into the drawing space via the coolant inlet, and to force the coolant into the cooling space via the coolant outlet and the coolant intake hole, such that the coolant removes heat generated by the motor, and is expelled from the cooling space via the coolant draining hole.
대표청구항▼
1. A liquid-cooled motor device comprising: a motor casing defining a retaining space, a cooling space that surrounds said retaining space, a coolant intake hole that is in fluid communication with said cooling space, and a coolant draining hole that is in fluid communication with said cooling space
1. A liquid-cooled motor device comprising: a motor casing defining a retaining space, a cooling space that surrounds said retaining space, a coolant intake hole that is in fluid communication with said cooling space, and a coolant draining hole that is in fluid communication with said cooling space;a motor disposed in said retaining space and having a rotatable output shaft;a coolant casing mounted to an outer surface of said motor casing, said coolant casing defining a drawing space, a coolant inlet that is in fluid communication with said drawing space, and a coolant outlet that is in fluid communication with said drawing space and said coolant intake hole; andan impeller co-rotatably connected to an end of said output shaft of said motor and disposed in said drawing space of said coolant casing, said impeller being rotated by said output shaft to draw a coolant into said drawing space via said coolant inlet, and to force the coolant to flow into said cooling space via said coolant outlet and said coolant intake hole, such that the coolant removes heat generated by said motor and is expelled from said cooling space via said coolant draining hole,wherein said motor casing includes a casing body that permits said motor to be disposed therein and that has two opposite open ends, and first and second caps that respectively cover said two opposite open ends of said casing body,said casing body has an inner surrounding wall that defines said retaining space therein, an outer surrounding wall that surrounds said inner surrounding wall and that cooperates with said inner surrounding wall to define said cooling space therebetween, and a plurality of cooling fins each extending from said inner surrounding wall toward said outer surrounding wall, andsaid casing body further has a plurality of connecting walls that are angularly spaced apart from each other and that are each connected between said inner and outer surrounding walls so as to divide said cooling space into a plurality of cooling space portions. 2. The liquid-cooled motor device as claimed in claim 1, wherein said coolant intake hole is formed in said first cap, and said coolant draining hole is formed in said second cap. 3. The liquid-cooled motor device as claimed in claim 2, wherein said first cap further has a coolant intake space that is in fluid communication with said cooling space and said coolant intake hole, said second cap further having a coolant draining space that is in fluid communication with said cooling space and said coolant draining hole. 4. The liquid-cooled motor device as claimed in claim 3, wherein said coolant intake space is configured as an annular space, said coolant draining space being configured as an annular space. 5. The liquid-cooled motor device as claimed in claim 1, wherein said coolant casing is separably mounted to an outer surface of said first cap. 6. The liquid-cooled motor device as claimed in claim 5, further comprising a connecting member that fluidly interconnects said coolant intake hole of said motor casing and said coolant outlet of said coolant casing. 7. The liquid-cooled motor device as claimed in claim 1, further comprising a connecting member that fluidly interconnects said coolant intake hole of said motor casing and said coolant outlet of said coolant casing.
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