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公开(公告)号：US4215755A
公开(公告)日：1980-08-05
申请号：US953791
申请日：1978-10-23
CPC分类号： B62D11/12
摘要： A variable-ratio power transmission mechanism having two output shafts for driving respective wheels or tracks at opposite sides of a heavy off-the-road vehicle, and having a steering mechanism for varying the relative rotational speeds of said shafts, is known. Where the steering mechanism includes a null shaft which is not driven when straight-line travel is required, said shaft has been driveable by hydrostatic means, but these have sometimes proved unreliable. It is therefore proposed to drive the null shaft by mechanical two-speed gearing driven from the input of the power transmission mechanism. The null shaft is selectively driveable by said gearing in either direction of rotation through the appropriate one of two progressively engaging clutches until it attains a first speed, and an epicyclic reduction gear in said gearing is then locked up to drive the null shaft in the same direction at a higher speed.
摘要翻译： 已知具有用于驱动重型越野车辆的相对侧的相应车轮或轨道的两个输出轴以及具有用于改变所述轴的相对转速的转向机构的可变比动力传递机构。 当转向机构包括一个空转轴时，在需要直行行驶时不驱动该轴，所述轴可以通过静液压装置驱动，但这些有时被证明是不可靠的。 因此，提出通过从动力传递机构的输入驱动的机械式双速传动装置驱动无效轴。 无效轴可以通过所述传动装置在两个逐渐接合的离合器中的适当的一个离合器中的任一个旋转方向上选择性地驱动，直到达到第一速度，然后将所述传动装置中的行星齿轮减速齿轮锁定以驱动相同的零轴 方向在更高的速度。
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公开(公告)号：US4065981A
公开(公告)日：1978-01-03
申请号：US495415
申请日：1974-08-07
CPC分类号： F16H37/043 , F16H3/095 , Y10T74/19233 , Y10T74/19628
摘要： Power transmission gearing has two countershafts both of which are mounted with virtually no capability of axial movement and drivably connected to a common driving shaft and a common driven shaft by gearing. The gearing which connects the countershafts to the driven shaft conprises a single helical gear of one hand on one of the countershafts, a single helical gear of the other hand on the other of the countershafts, and a double-helical gear assembly on the driven shaft, one toothed zone of the doublehelical gear assembly meshing with one of the single helical gears and the other toothed zone of said assembly meshing with the other of said gears. The double-helical gear assembly is capable of axial movement on the driven shaft to equalize the torque transmitted by each countershaft.
摘要翻译： 动力传动传动装置具有两个中间轴，两个中间轴几乎不具有轴向运动的能力，并通过齿轮传动连接到公共驱动轴和公共从动轴。 将中间轴连接到从动轴的传动装置使一只手的单个斜齿轮在一个中间轴上，另一只手的另一个中间轴上的单个斜齿轮和从动轴上的双斜齿轮组件 所述双螺旋齿轮组件的一个齿形区域与所述单个斜齿轮中的一个啮合，并且所述组件的另一齿形区域与所述齿轮中的另一个啮合。 双斜齿轮组件能够在从动轴上轴向运动，以平衡每个中间轴传递的扭矩。
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公开(公告)号：US4236617A
公开(公告)日：1980-12-02
申请号：US901823
申请日：1978-05-01
申请人： Eric A. Whateley
发明人： Eric A. Whateley
CPC分类号： F16H61/66 , B60W10/10 , B60W10/18 , F16H61/143
摘要： A vehicle includes variable-ratio gearing driven via a hydrodynamic torque converter. The converter has a hydraulically-engaged lock-up clutch which is temporarily disengaged whenever a ratio is disengaged. The vehicle has a system of hydraulically-engaged clutches and brakes for changing ratio, and a system of hydraulically-engaged brakes for bringing the vehicle to rest. The respective operating pressures in the clutch-and-brake system and the braking system are independently modulated, in order more smoothly to change ratio or bring the vehicle to rest, by enabling a relief valve in each system to open against a determined spring force when pilot pressure exerted on each valve in the closing direction and derived from the operating cylinder of the lock-up clutch is temporarily cut off.
摘要翻译： 车辆包括通过液力变矩器驱动的可变比齿轮传动装置。 转换器具有液压接合的锁止离合器，每当脱离比例时，离合器暂时脱离。 车辆具有用于变速比的液压接合离合器和制动器的系统，以及用于使车辆休息的液压制动系统。 离合器 - 制动系统和制动系统中的各自的操作压力被独立地调节，以便更平稳地改变比率或使车辆静止，通过使得每个系统中的安全阀能够打开一个确定的弹簧力， 临时切断从关闭方向施加在每个阀上并且从锁止离合器的操作缸导出的先导压力。
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