Electric hydraulic hybrid motor
AssigneeKomatsu Ltd.
InventorsNaoki Ishizaki, Kazuo Uehara, Hiromasa Yamaguchi
Life of this patent
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Abstract
The present invention is an electric hydraulic hybrid motor which can be made smaller in size and can provide excellent performance. To this end, a hydraulic pump (20) and a hydraulic motor (60) are respectively placed inwardly of the stator (12) of an electric motor (10) and the rotor (14) of the electric motor (10), and the hydraulic pump (20) includes a cylinder block (21) for the pump and a plunger (23) for the pump which are adapted to rotate together with the rotor (14), and the hydraulic motor (60) includes a cylinder block (61) for the motor and a plunger (23a) for the motor.
Claims23
An electric hydraulic hybrid motor which includes an electric motor, a hydraulic pump which is driven by said electric motor, and a hydraulic motor which is driven by said hydraulic pump, with said hydraulic pump or said hydraulic motor being placed inwardly of a rotor of said electric motor;
- wherein said hydraulic pump (20) is placed inwardly of the stator (12) of said electric motor (10) and said hydraulic motor (60) is placed inwardly of said rotor (14);
- wherein said hydraulic pump (20) includes a cylinder block (21) for a pump and a plunger (23) for the pump which are rotated integrally with said rotor (14);
- wherein said hydraulic motor (60) includes a cylinder block (61) for a motor and a plunger (23a) for the motor;
- and further comprising:
- a port block (52) which supplies and discharges oil between said cylinder block (21) for the pump and said cylinder block (61) for the motor, and a case (11) which is provided with said electric motor (10), said hydraulic pump (20), and said hydraulic motor (60) therein, and which supports said port block (52).
An electric hydraulic hybrid motor comprising:
- an electric motor having a stator and a rotor;
- a hydraulic pump, which is driven by said electric motor and which is positioned inwardly of said stator of said electric motor;
- said hydraulic pump including a pump cylinder block, having at least one first chamber formed therein, and at least one pump plunger, each pump plunger being slidably positioned in a respective one of said at least one first chamber in said pump cylinder block so that each pump plunger is rotatable integrally with said pump cylinder block, said pump cylinder block being rotatable integrally with said rotor;
- and
- a hydraulic motor, which is driven by said hydraulic pump and which is positioned inwardly of said rotor of said electric motor;
- said hydraulic motor including a motor cylinder block, having at least one second chamber formed therein, and at least one motor plunger, each motor plunger being slidably positioned in a respective one of said at least one second chamber.
Dependencies are inferred from the claim text.