Differential gearing unit for vehicle
    25.
    发明授权
    Differential gearing unit for vehicle 有权
    车用差速装置

    公开(公告)号:US06955626B2

    公开(公告)日:2005-10-18

    申请号:US10602950

    申请日:2003-06-24

    摘要: A sun gear 6 is concentrically, rotatably disposed inside an internal gear 4. Plural planet gears 8, carried by a planetary carrier 10, are disposed between and in meshing engagement with the internal gear 4 and the sun gear 6. The planetary carrier 10 is connected to a shaft extending from an engine while the internal gear 4 and the sun gear 6 are connected to output shafts. The internal gear 4 is molded by a plastic working, followed by a thermal treatment including soft-nitriding, a nitriding and a carburizing hardening step. The inner surface of the internal gear 4 is formed with internal gear teeth 4b, except for an axial portion 4d, while a spline groove 4a is formed on the outer surface of the internal gear 4 at a location corresponding to the portion 4d where no internal teeth 4b are formed for engagement with a spline 2a on a housing 2. The internal gear 4 is reduced in size while improving the mechanical strength thereof.

    摘要翻译: 太阳齿轮6同心地可旋转地设置在内齿轮4的内部。由行星架10承载的多个行星齿轮8设置在内齿轮4和太阳齿轮6之间并与内齿轮4和太阳轮6啮合。行星架10 连接到从发动机延伸的轴,而内齿轮4和太阳齿轮6连接到输出轴。 内齿轮4通过塑性加工成型,然后进行包括软氮化,氮化和渗碳硬化步骤的热处理。 内齿轮4的内表面形成有内齿轮齿4b,除了轴向部分4d之外,而在内齿轮4的外表面上形成花键槽4a的位置对应于部分4 d,其中没有内齿形成用于与壳体2上的花键2a接合。内齿轮4的尺寸减小,同时提高其机械强度。