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1. 发明申请

WO1997014896A1 CONTINUOUSLY VARIABLE HYDROSTATIC TRANSMISSION WITH NEUTRAL-SETTING HYDRAULIC CIRCUIT 审中-公开
标题翻译：具有中性液压电路的连续可变液压变速器
公开(公告)号：WO1997014896A1
公开(公告)日：1997-04-24
申请号：PCT/US1996012591
申请日：1996-07-31
申请人： LOCKHEED MARTIN CORPORATION
发明人： LOCKHEED MARTIN CORPORATION , LARKIN, Robert, Francis , PURCELL, Donald, Mark
IPC分类号： F16H39/10
CPC分类号： F16H61/439 , F16H39/10 , F16H61/4043 , F16H2039/105 , Y10S188/01
摘要： A continuously variable hydrostatic transmission includes axially aligned input (14) and output (16) shafts journaled by a transmission housing (12) and respectively coupled to a prime mover and a load. The input shaft (14) drives a hydraulic pump unit (18) while a hydraulic motor unit (20) is grounded to the transmission housing (12). A wedge-shaped swashplate (22) is pivotally connected to the output shaft (16) in operative position to accommodate pressurized hydraulic fluid exchanges between the pump (18) and motor (20) units. A controller (24) is coupled to adjust the angular orientation of the swashplate (22) relative to the output shaft axis (35) and thus set the transmission ratio. A hydraulic circuit (26), connected into the hydraulic motor unit (20), is selectively operable to vent high and low fluid pressure sides of the swashplate (22) to atmosphere, thus imposing a neutral transmission ratio condition regardless of the transmission ratio set by the controller (24).
摘要翻译：一种连续可变的静液压变速器包括由变速器壳体（12）轴颈并且分别联接到原动机和负载的轴向对准的输入（14）和轴（16）轴。当液压马达单元（20）接地到变速器壳体（12）时，输入轴（14）驱动液压泵单元（18）。楔形斜盘（22）以可操作的位置枢转地连接到输出轴（16），以适应泵（18）和马达（20）单元之间的加压液压流体交换。控制器（24）被联接以相对于输出轴轴线（35）调节旋转斜盘（22）的角度定向，从而设定传动比。连接到液压马达单元（20）中的液压回路（26）可选择性地可操作地将旋转斜盘（22）的高低流侧排放到大气中，从而施加中性传动比条件，而与传动比设定无关通过控制器（24）。

2. 发明申请

WO1996030673A1 CONTINUOUSLY VARIABLE HYDROSTATIC TRANSMISSION HAVING SWASHPLATE-MOUNTED CYLINDER BLOCKS 审中-公开
标题翻译：连续可变的带有安全气缸组件的变速箱
公开(公告)号：WO1996030673A1
公开(公告)日：1996-10-03
申请号：PCT/US1996001785
申请日：1996-02-07
申请人： LOCKHEED MARTIN CORPORATION
发明人： LOCKHEED MARTIN CORPORATION , LARKIN, Robert, Francis
IPC分类号： F16H39/10
CPC分类号： F16H39/10 , F16H2039/105
摘要： A hydrostatic transmission (10) includes wedge-shaped swashplate (54) operatively positioned between a hydraulic pump unit (28) driven by an input shaft (14) and a grounded hydraulic motor unit (40) to accomodate pumped exchanges of hydraulic fluid between the units (28, 40). The swashplate (54), drivingly coupled to an output shaft (16), is angularly adjustable about a pivot axis (57) oriented in intersecting, orthogonal relation to the output shaft axis (17) to infinitely variable transmission ratios. Pilot bearings (72, 75), mounted by the swashplate (54), support cylinder blocks (36, 48) of the hydraulic pump and motor units (28, 40) for nutating motions centered on the swashplate pivot axis (57) to minimize the resultant moment on the swashplate (54). Piston rods (32, 44) in the hydraulic pump and motor units (28, 40) are oriented in outwardly flared, acute angles to the output shaft axis (17) to expand the range of permissible angular adjustement of the swashplate (54) by a ratio controller (68).
摘要翻译：液压传动装置（10）包括可操作地定位在由输入轴（14）驱动的液压泵单元（28）和接地液压马达单元（40）之间的楔形斜盘（54），以容纳泵送液压流体单位（28，40）。驱动地联接到输出轴（16）的斜盘（54）围绕枢转轴线（57）成角度地调节，所述枢转轴线（57）以与输出轴轴线（17）相交正交的关系为无级变速传动比。由斜盘（54）安装的先导轴承（72,75）支撑液压泵和马达单元（28,40）的气缸体（36,48），用于以斜盘枢转轴线（57）为中心的章动运动，以使在斜盘（54）上的结果时刻。液压泵和马达单元（28,40）中的活塞杆（32,44）定向成与输出轴轴线（17）成向外扩张的锐角，以将斜盘（54）的允许的角度调节范围扩大到斜盘比率控制器（68）。

3. 发明申请

WO1996033347A1 POSITIONING APPARATUS AND METHOD UTILIZING PWM CONTROL OF A DOUBLE-ACTING HYDRAULIC CYLINDER 审中-公开
标题翻译：使用双作用液压缸的PWM控制的定位装置和方法
公开(公告)号：WO1996033347A1
公开(公告)日：1996-10-24
申请号：PCT/US1996001750
申请日：1996-02-07
申请人： LOCKHEED MARTIN CORPORATION
发明人： LOCKHEED MARTIN CORPORATION , LARKIN, Robert, Francis
IPC分类号： F15B09/03
CPC分类号： G05D3/18 , F15B9/03 , F15B2211/3057 , F15B2211/7054
摘要： A double-acting hydraulic cylinder is controlled by a pair of three-way solenoid valves respectively fluid connected to the two ends of the cylinder and energized in parallel with a continuous stream of pulse width modulated (PWM) pulses to create a mean effective fluid pressure balance at the cylinder ends that hold a desired position of a connected load and mean effective fluid pressure imbalances in the cylinder ends that produce variable rate load movement in either of two directions to a desired new position, all determined by the pulse duty cycle.
摘要翻译：双作用液压缸由一对三通电磁阀控制，该三通电磁阀分别流体连接到气缸的两端并与脉冲宽度调制（PWM）脉冲的连续流并联并产生平均有效流体压力在气缸端部处的平衡，其保持连接的负载的期望位置，并且在气缸端部中平均有效的流体压力不平衡，其在两个方向中的任一方向上产生可变速率负载运动到所需的新位置，全部由脉冲占空比确定。

4. 发明申请

WO1997032145A1 MULTI-RANGE HYDROMECHANICAL TRANSMISSION FOR MOTOR VEHICLES 审中-公开
标题翻译：用于电机的多级水文变速器
公开(公告)号：WO1997032145A1
公开(公告)日：1997-09-04
申请号：PCT/US1996012702
申请日：1996-08-05
申请人： LOCKHEED MARTIN CORPORATION
发明人： LOCKHEED MARTIN CORPORATION , LARKIN, Robert, Francis
IPC分类号： F16H47/04
CPC分类号： F16H47/04 , F16H2037/088 , F16H2037/0886 , F16H2037/108
摘要： A hydromechanical transmission receives split power inputs from a vehicle engine, one split input driving a hydrostatic power unit and the other split input driving a mechanical power input. The infinitely variable hydrostatic power output is combined in the mechanical power unit with multiple ratios of its split input power to achieve multiple ratios of hydromechanical output power for smoothly propelling a vehicle from rest through multiple transmission ranges to maximum speed, with synchronous shifting between ranges.
摘要翻译：液压机械变速器从车辆发动机接收分离的动力输入，一个分流输入驱动静液压力单元，另一个分流输入驱动机械动力输入。无级可变静液压力输出在机械动力单元中与多个分流输入功率比组合在一起，以实现多个液压机械输出功率比，从而将车辆从多个传动范围到最大速度平稳地推进，同时在范围之间进行换档。

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