| 摘要 |
PURPOSE: An oil gear pump for an automatic transmission is provided to increase noise and vibration efficiency with a speed range under a specific revolution speed(2500 rpm), and to improve noise and vibration efficiency generally occurring in a low speed. CONSTITUTION: An oil gear pump for an automatic transmission includes a housing(100). The housing includes a pressure chamber(110), an intake port, and a discharge port(130). A closing part angle(Θ1) formed by an inlet of the intake port and an outlet of the discharge port is 9.8° and a sealing part angle(Θ2) formed by an outlet of the intake port and an inlet of the discharge port is 40.5°. Depth of the outlet side of the intake port is 2 mm and gradually increased as it goes to the inlet side, and step difference(122) is obliquely formed to 10.6 mm. The angle from the center of the pressure chamber to the outlet side is 48.5°. Protrusion part (121) in the central part of the edge of the outlet side of the intake port, a groove is formed in the inlet side of the discharge port. |
