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发明公开
CN1856650A 油泵转子 有权

油泵转子
摘要：
一种油泵转子，即使在油泵转子发生的油压微小，且驱动该油泵转子的转矩发生变动，也确实地抑制噪音的发生。根据本发明的油泵转子，各油泵转子构成为，形成根据由滚动在基圆(bi)上的第一外接滚动圆(Di)及第一内接滚动圆(di)形成的摆线曲线而形成的n个齿数的内转子(10)，形成根据由滚动在基圆(bo)上的第二外接滚动圆(Do)及第二内接滚动圆(do)形成的摆线曲线而形成的n+1个齿数的外转子(20)，形成两个转子时，将上述各圆的直径为φbi、φDi、φdi、φbo、φDo、φdo时，φbi＝n·(φDi+φdi)，φbo＝(n+1)·(φDo+φdo)，φDi+φdi＝2e，或φDo+φdo＝2e，并且，满足下式φDo＞φDi，φdi＞φdo，(φDi+φdi)＜(φDo+φdo)。
摘要（英）：

Noise is reliably suppressed from occurring even if an oil pressure produced in an oil pump rotor is very low and even if torque driving the rotor varies. An inner rotor (10) has n number of teeth formed based on a cycloid curve generated by a first external rolling circle (Di) and a first internal rolling circle (di) that roll on a base circle (bi). An outer rotor (20) has (n + 1) number of teeth formed based on a cycloid curve generated by a second external rolling circle (Do) and a second internal rolling circle (do) that roll on a base circle (bo). In the above, when the diameters of the circles are phiDi, phidi, phibi, phiDo, phido, phibo, respectively, each of the rotors satisfies phibi = n.(phiDi + phidi), phibo = (n + 1).(phiDo + phido), and either phiDi + phidi = 2e or phiDo + phido = 2e, and satisfies in addition phiDo > phiDi, phidi > phido and (phiDi + phidi) < (phiDo +phido).

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