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US 12,650,125 B2Granted
Electronic oil pump
AssigneeCoavis
InventorsHyuntae Lee, Wookeun Lee, Hyukjin Lee
Life of this patent
Estimating the term…
Abstract
Provided is an electronic oil pump for circulating oil by driving an electric motor, and more particularly, an electronic oil pump which may ensure rotational stability of a gerotor and minimize a pumping loss by cooling the electric motor by using pumped oil.
Claims7
An electronic oil pump comprising:
- a body case having a first side where a first suction passage and a first discharge passage of a fluid are formed, and having a gerotor installed therein;
- an upper case having a first side open, having a cooling space formed therein, and having the body case coupled to an open surface of the first side of the upper case;
- the gerotor installed in the body case, including an internal rotor and an external rotor engaged with each other to be eccentrically rotated, a suction part of the gerotor communicating with the first suction passage, and a discharge part of the gerotor communicating with the first discharge passage;
- and
- an electric motor installed in the cooling space, and including a shaft for transmitting a rotational force to the gerotor,
- wherein the body case includes:
- a cooling inflow passage for supplying the fluid in the discharge part to the cooling space by allowing the discharge part of the gerotor and the cooling space to communicate with each other;
- and
- a second discharge passage for supplying the fluid in the cooling space to the first discharge passage by allowing the cooling space and the first discharge passage to communicate with each other,
- wherein the body case further includes a second suction passage branched off from the first suction passage, and communicating with the suction part of the gerotor,
- wherein the body case includes:
- a lower case having a first side where the first suction passage and first discharge passage of the fluid are formed, and
- a central case coupled to a second side of the lower case and having a first side where a seating part on which the gerotor is seated is formed, and
- the second suction passage includes a first connection passage and a second connection passage,
- the first connection passage being formed in the lower case, and having an upstream end communicating with the first suction passage and a downstream end connected to the second connection passage, and
- the second connection passage being formed in the central case, and having an upstream end communicating with the first connection passage and a downstream end connected to the suction part of the gerotor.
13 more elements
An electronic oil pump comprising:
- a body case having a first side where a first suction passage and a first discharge passage of a fluid are formed, and having a gerotor installed therein;
- an upper case having an open surface at a first side, having a cooling space formed therein, and having the body case coupled to the open surface of the first side of the upper case;
- the gerotor installed in the body case, including an internal rotor and an external rotor engaged with each other to be eccentrically rotated, a suction part of the gerotor communicating with the first suction passage, and a discharge part of the gerotor communicating with the first discharge passage;
- and
- an electric motor installed in the cooling space, and including a shaft for transmitting a rotational force to the gerotor,
- wherein the body case includes:
- a cooling inflow passage for supplying the fluid in the discharge part to the cooling space by allowing the discharge part of the gerotor and the cooling space to communicate with each other;
- and
- a second discharge passage for supplying the fluid in the cooling space to the first discharge passage by allowing the cooling space and the first discharge passage to communicate with each other,
- wherein the body case includes:
- a lower case having a first side where the first suction passage and the first discharge passage of the fluid are formed, and
- a central case coupled to a second side of the lower case and having a first side where a seating part on which the gerotor is seated is formed, and
- the second discharge passage includes a cooling leakage passage and a third connection passage,
- the cooling leakage passage being formed in the central case, and having an upstream end communicating with the cooling space and a downstream end communicating with the third connection passage, and
- the third connection passage being formed in the lower case, and having an upstream end communicating with the cooling leakage passage and a downstream end communicating with the first discharge passage.
12 more elements
Dependencies are inferred from the claim text.