③ When the transmission ratio is co

③当传动比恒定且驱动齿轮尺寸相同时，双曲面从动齿轮汽车主减速器的主动伞齿轮有两种支撑形式：①悬臂悬臂支撑结构如图1.2所示。其特点是在锥齿轮的大端侧采用了更长的轴直径，并在其上安装了两个圆锥滚子轴承。为了减小悬臂长度A并增加两端之间的距离B以提高支撑刚度，两个轴承的圆锥滚子应向外制成。悬臂支架结构简单，支撑刚度差，主要用于单级主减速器和许多变速箱重量轻的轻型货车的双级主减速器。

（3） 当变速箱比保持不变且驱动齿轮尺寸相同时，超螺栓驱动齿轮汽车主减速器的驱动斜面齿轮有两种支撑形式：（1） 悬臂悬臂支撑结构显示在图 1.2 中，其特点是在斜面齿轮的大端采用更长的轴直径，并在其上安装两个锥形滚轴承。为了减少悬臂长度 A 和增加两端之间的距离 B 以提高支撑刚度，应向外制作两个轴承的锥形滚筒。悬臂支架结构简单，支撑刚度差，主要用于单级主减压器和许多双级主减速器，车和轻型卡车的传动重量较小。

③ When the transmission ratio is constant and the size of the driving gear is the same, there are two supporting forms for the driving bevel gear of the hyperboloid driven gear automobile main reducer: ① Cantilever cantilever supporting structure is shown in Figure 1.2, which is characterized by adopting a longer shaft diameter on the big end side of the bevel gear and mounting two tapered roller bearings on it. In order to reduce the cantilever length A and increase the distance B between the two ends to improve the support stiffness, the tapered rollers of the two bearings should be made outward. Cantilever support is simple in structure and poor in support stiffness, which is mostly used in single-stage main reducer and many double-stage main reducers of cars and light trucks with small transmission weight.<br>