公开(公告)号：US07739870B2

公开(公告)日：2010-06-22

申请号：US11831042

申请日：2007-07-31

申请人： Robert Carlson ,  Thomas D. Blum ,  Tandrea Lea Sperfslage

发明人： Robert Carlson ,  Thomas D. Blum ,  Tandrea Lea Sperfslage

IPC分类号： F16H47/04 ,  F16H39/46

CPC分类号： F16H61/4061 ,  F16H39/14 ,  F16H61/4035 ,  F16H61/4052 ,  F16H61/4148

摘要： A transmission for a vehicle includes a fixed displacement pump operable to produce a high pressure flow and a fixed displacement motor. A fluid flow path is disposed between the pump and the motor. The fluid flow path is integrated into a housing containing at least one of the pump and the motor. A single control valve controls the direction and the speed of the motor.

摘要翻译： 用于车辆的变速器包括可操作以产生高压流量的固定排量泵和固定排量马达。 流体流路设置在泵和马达之间。 流体流动路径被集成到容纳泵和马达中的至少一个的壳体中。 单个控制阀控制电机的方向和速度。

公开(公告)号：US4566274A

公开(公告)日：1986-01-28

申请号：US538415

申请日：1983-10-03

申请人： Joachim Heiser ,  Dieter Weigle

发明人： Joachim Heiser ,  Dieter Weigle

IPC分类号： F16H61/42 ,  F16H61/423 ,  F16H61/46 ,  F16H61/47 ,  F16H39/46

CPC分类号： F16H61/47 ,  F16H61/423 ,  F16H61/46

摘要： Disclosed is a control arrangement for a hydrostatic drive of the type having a power-driven adjustable pump, a pressure responsive setting cylinder coupled to the pump, a hydraulic motor connected via pressure conduits to the pump and a measuring motor coupled to the hydraulic motor to rotate with a proportional rotary speed. A supply pump is connected in a control circuit including the measuring motor and a nominal or desired value generator in the form of an adjustable throttle by means of which the desired rotary speed of the hydraulic motor is adjusted. Deviations between the actual and desired speeds produce a differential control flow which is fed to the setting cylinder which adjusts the position of an adjusting member of the pump for so long as until the deviation equals zero.

摘要翻译： 公开了一种用于静液压驱动的控制装置，其具有动力可调节泵，连接到泵的压力响应设定缸，通过压力管连接到泵的液压马达和耦合到液压马达的测量马达 以比例旋转速度旋转。 供给泵连接在控制电路中，该控制电路包括测量电动机和可调整节气门形式的标称值或期望值发生器，通过该供给泵调节液压马达的期望转速。 实际速度和期望速度之间的偏差产生差动控制流，该差动控制流被输送到调节缸的调节构件的位置，直到偏差等于零为止。

公开(公告)号：US4530416A

公开(公告)日：1985-07-23

申请号：US497397

申请日：1983-05-23

申请人： Denes P. Kassai

发明人： Denes P. Kassai

IPC分类号： B60K17/10 ,  B60T13/58 ,  F16H61/40 ,  F16H61/4157 ,  F16H61/42 ,  F16H39/46

CPC分类号： F16H61/4157 ,  B60T13/585 ,  F16H61/42 ,  Y10S188/01

摘要： A hydrostatic propulsion system and method of operation is disclosed for smoothly driving a vehicle, such as a street sweeper. The system includes a shift lever for selectively moving a pump stroking valve into reverse, neutral, low forward, and fast forward speed positions to prepare the system. After the shift lever has been placed in a forward or reverse position, an accelerator pedal must be depressed to partially or fully close an inching throttle valve before the pump swash plate moves from its zero piston displacement position and begins to pump fluid to the hydrostatic motors. Hydrostatic braking forces are applied when the accelerator pedal is released and also in response to initial depression of a brake pedal for providing normal braking to the vehicle. Further depression of the brake pedal operates a conventional brake system for panic stops. Movement into the high forward speed range is accomplished by moving the shift lever into "high" which activates a circuit for shifting the swash plates of the hydrostatic motors into high speed positions.

摘要翻译： 公开了一种静压推进系统和操作方法，用于平稳地驾驶诸如清道车的车辆。 该系统包括用于选择性地将泵抽动阀移动到反向，中立，低前进和快进速度位置以便准备系统的换档杆。 在变速杆已经被放置在向前或反向位置之后，在泵斜盘从其零活塞位移位置移动并开始将流体泵送到静液压电动机之前，必须压下加速器踏板以部分或全部关闭微动节流阀 。 当加速器踏板被释放并且还响应于用于向车辆提供正常制动的制动踏板的初始下压时施加静液压制动力。 制动踏板的进一步按压操作了用于紧急停止的常规制动系统。 移动到高前进速度范围是通过将换档杆移动到“高”来实现的，“高”激活用于将静液压马达的斜盘移动到高速位置的回路。

公开(公告)号：US4449366A

公开(公告)日：1984-05-22

申请号：US268235

申请日：1981-05-29

申请人： Hideyori Sato ,  Mitsuru Arai

发明人： Hideyori Sato ,  Mitsuru Arai

IPC分类号： E02F9/22 ,  F15B11/17 ,  F16H39/46

CPC分类号： F15B11/17 ,  E02F9/2232 ,  E02F9/2239 ,  E02F9/2282 ,  E02F9/2292 ,  E02F9/2296 ,  F15B2211/20553 ,  F15B2211/20576 ,  F15B2211/3116 ,  F15B2211/3127 ,  F15B2211/67 ,  F15B2211/71

摘要： A hydraulic excavator is disclosed which includes two sets of manual control valves for selectively placing a pair of variable displacement pumps in and out of communication with hydraulically driven components such as propelling motors, arm cylinders and boom cylinders. In order to minimize the per-cycle displacement of the pumps when same are discommunicated from all the driven components, a sensing valve is provided which is pilot operated from the sets of manual control valves. When all the manual control valves are in neutral, the sensing valve directs pressurized fluid from a charging pump to a pump-displacement adjustment mechanism thereby causing same to reduce the per-cycle displacement of the pumps to a minimum.

摘要翻译： 公开了一种液压挖掘机，其包括两组手动控制阀，用于选择性地将一对可变排量泵放置在与液压驱动部件（例如推进马达，臂缸和动臂缸）连通中。 为了尽可能减少泵在与所有从动部件相通时的每循环位移，提供了一组感应阀，该传感阀由该组手动控制阀引导操作。 当所有手动控制阀处于空档状态时，传感阀将加压流体从充气泵引导到泵排量调节机构，从而使泵的排放量逐渐减小到最小。

公开(公告)号：US4400939A

公开(公告)日：1983-08-30

申请号：US209257

申请日：1980-11-21

申请人： Giampaolo Moranduzzo ,  Theodor Abels ,  Hans-Waldemar Stuhr

发明人： Giampaolo Moranduzzo ,  Theodor Abels ,  Hans-Waldemar Stuhr

IPC分类号： F02B61/00 ,  B60W10/00 ,  B60W10/04 ,  B60W10/103 ,  F16H61/42 ,  F16H61/46 ,  F16H61/468 ,  F16H39/46

CPC分类号： F16H61/42 ,  B60W10/04 ,  B60W10/103 ,  F16H61/468 ,  B60W10/06

摘要： A drive unit is provided consisting of an internal combustion engine, a continuously variable transmission unit and a fluid operated regulating assembly interconnecting said internal combustion engine and transmission and operated by a single manual control. A second manual control may be provided for interconnecting the engine and a stroke mechanism drive independently of the transmission for operating an auxiliary hydraulic or like circuit.

摘要翻译： 提供的驱动单元包括内燃机，无级变速器单元和连接所述内燃机和变速器并通过单个手动控制操作的流体调节组件。 可以提供第二手动控制，用于将发动机和行程机构驱动器独立于用于操作辅助液压或类似电路的变速器互连。

公开(公告)号：US4381647A

公开(公告)日：1983-05-03

申请号：US261108

申请日：1980-09-12

申请人： Walter Z. Ruseff

发明人： Walter Z. Ruseff

IPC分类号： F04B49/00 ,  F16H61/40 ,  F16H61/42 ,  F16H39/46

CPC分类号： F04B49/002 ,  F04B2205/05

摘要： A "load-plus" valve is oftentimes utilized in the servo-system for a variable displacement pump to maintain pump discharge pressure above a minimum pressure level and above a load pressure in a fluid actuator. Valves of this type normally employ a spring interconnected between a modulating spool and a piston which is responsive to load pressure to modulate a control pressure, controlling the displacement of the pump. Valves of this type thus provide a constant discharge pressure margin over load pressure while also providing the pump's minimum stand-by pressure. However, valves of this type further provide pump packages which are somewhat bulky in design. The improved load-plus valve (22) of this invention provides a spool (49) movable between a first position communicating a control pressure (P.sub.C) from a pump (11) to a control chamber (24) and a second position at least partially venting the control chamber (24), and a piston (57) movable between a first position isolating the piston (57) from the spool (49) to enable the spool (49) to move independently of the piston (57 ) and a second position engaging and moving the spool (49) to modulate the control pressure (P.sub.C) in response to variations in a load pressure (P.sub.L) in a fluid actuator (13).

摘要翻译： 在伺服系统中通常使用“负载加”阀用于可变排量泵，以将泵排出压力保持在最小压力水平以上并高于流体致动器中的负载压力。 这种类型的阀通常采用在调节阀芯和活塞之间连接的弹簧，该弹簧响应负载压力来调节控制压力，控制泵的位移。 因此，这种阀门在负载压力下提供恒定的排出压力裕度，同时还提供泵的最小待机压力。 然而，这种阀门还提供了在设计上稍微笨重的泵包装。 本发明的改进的负载加压阀（22）提供了一个可在将来自泵（11）与控制室（24）之间传递控制压力（PC）的第一位置和至少部分地从泵 排出控制室（24），以及活塞（57），其可在将活塞（57）与阀芯（49）隔离的第一位置之间移动，以使阀芯（49）能够独立于活塞（57）移动，第二位置 位置接合和移动阀芯（49）以响应于流体致动器（13）中的负载压力（PL）的变化来调制控制压力（PC）。

公开(公告)号：US4364230A

公开(公告)日：1982-12-21

申请号：US194765

申请日：1980-10-07

申请人： William K. Holmes

发明人： William K. Holmes

IPC分类号： F16H61/40 ,  F16H61/4157 ,  F16H61/46 ,  F16H61/478 ,  F16H39/46 ,  F04B49/02

CPC分类号： F16H61/4157 ,  F16H61/46 ,  F16H61/478

摘要： A hydraulic circuit is provided to prevent overspeeding the prime mover powering a hydrostatic transmission. The hydrostatic transmission includes a hydraulic motor fluidly coupled to a hydraulic pump. The hydraulic pump is driven by the prime mover and the hydraulic motor drives a rotational load. The hydraulic pump includes a swash plate tilted by a servomechanism. The servomechanism receives hydraulic fluid from a pump powered by the prime mover. A valve is operated to shut-off the hydraulic fluid to the servomechanism in the event that the pressure in either of the two conduits joining together the hydraulic pump and the hydraulic motor exceeds a pre-set maximum value or if the pressure in an auxiliary line exceeds the same pre-set maximum value or if the sum of the two pressures exceeds the pre-set maximum value. The pre-set maximum value is a variable quantity having its maximum value when the angle of tilt on a swash plate within the hydraulic pump is zero or when the plate is approximately perpendicular to the axis of rotation of the plate. It is proportional to the horsepower demanded from the prime mover. By shutting off the supply of hydraulic fluid to the servomechanism when the auxiliary pressure or any of the two pressures in the two lines coupling hydraulic motor with the hydraulic pump becomes excessive, the hydraulic pump is precluded from being operated to load the prime mover in such a matter that the prime mover and pump would accelerate to an overspeed condition. This circuit is superior to those devices which sense an engine overspeed condition and then react because this circuit prevents the overspeed condition from occurring in the first place.

摘要翻译： 提供液压回路，以防止原动机超速给静液压传动装置供电。 静液压变速器包括流体耦合到液压泵的液压马达。 液压泵由原动机驱动，液压马达驱动旋转负载。 液压泵包括由伺服机构倾斜的斜盘。 伺服机构从由原动机供电的泵接收液压油。 如果连接在一起的液压泵和液压马达的两个导管中的任一个的压力超过预设的最大值或辅助线中的压力，则阀被操作以将液压流体切断到伺服机构 超过相同的预设最大值，或者两个压力之和超过预设的最大值。 当液压泵内的旋转斜盘上的倾斜角为零时或当板近似垂直于板的旋转轴线时，预设最大值是具有其最大值的可变量。 它与原动机所需的马力成比例。 当辅助压力或液压马达与液压泵耦合的两条线路中的两个压力中的任何一个压力变得过大时，通过关闭液压流体对伺服机构的供给，可以防止液压泵被运行以将原动机 原动机和泵将加速到超速状态。 该电路优于感测发动机超速状况的那些装置，然后反应，因为该电路首先防止超速状况发生。

公开(公告)号：US4317331A

公开(公告)日：1982-03-02

申请号：US98050

申请日：1979-11-28

申请人： Taketo Aruga ,  Koichi Morita

发明人： Taketo Aruga ,  Koichi Morita

IPC分类号： B60K17/10 ,  B60T1/08 ,  B60T7/12 ,  B60T10/00 ,  B60T11/10 ,  B60T13/22 ,  B60T15/36 ,  B60W10/02 ,  B60W10/12 ,  B60W10/18 ,  F15B11/044 ,  F16H61/66 ,  F16H39/04 ,  F16H39/46

CPC分类号： F16H61/66 ,  B60T1/08 ,  B60T11/103 ,  B60T13/22 ,  B60T7/12 ,  B60W10/10 ,  B60W10/18 ,  F15B11/0445 ,  F16H61/4157 ,  F16H61/46 ,  F16H63/483 ,  F15B2211/20553 ,  F15B2211/20561 ,  F15B2211/30505 ,  F15B2211/40515 ,  F15B2211/41536 ,  F15B2211/428 ,  F15B2211/45 ,  F15B2211/613 ,  F15B2211/6355 ,  F15B2211/7058 ,  F15B2211/715 ,  F16H2063/3033

摘要： A hydraulic circuit for a hydraulically driven vehicle comprising an engine, a variable displacement pump driven by the engine, a hydraulic motor connected with the variable displacement pump and driven thereby, the hydraulic motor having an output shaft connected thereto, a first fixed displacement pump driven by the engine, an inching brake valve connected with the first fixed displacement pump, a control valve connected with the output side of the inching brake valve for controlling the forward and reverse movement of the vehicle and speed thereof, the output side of which is connected with the variable displacement pump, a parking brake coupled with the output shaft of the hydraulic motor, the parking brake being normally applied by a spring and hydraulically released, a pilot operated first brake control valve connected with the parking brake, a manually operated pump connected with the first brake control valve and the inching brake valve, a pilot operated second brake control valve connected with the first brake control valve, a pilot port thereof being connected with the output side of the control valve, and a second fixed displacement pump driven by the engine and connected with the second brake control valve.

摘要翻译： 一种用于液压驱动车辆的液压回路，包括发动机，由发动机驱动的可变排量泵，与可变排量泵连接并由其驱动的液压马达，具有连接到其上的输出轴的液压马达，第一固定排量泵驱动 通过发动机与第一固定排量泵连接的微动制动阀，与该微动制动阀的输出侧连接的控制阀，用于控制车辆的前进和后退运动及其速度，其输出侧被连接 与可变排量泵一起，与液压马达的输出轴联接的驻车制动器，驻车制动器通常由弹簧施加并液压释放，与驻车制动器连接的先导操作的第一制动控制阀，连接的手动泵 与第一制动控制阀和微动制动阀，先导操作第二制动控制va 与第一制动控制阀连接，其先导端口与控制阀的输出侧连接，第二固定排量泵由发动机驱动并与第二制动控制阀连接。

公开(公告)号：US4208874A

公开(公告)日：1980-06-24

申请号：US937233

申请日：1978-08-28

申请人： Jesse L. Field, Jr.

发明人： Jesse L. Field, Jr.

IPC分类号： F15B11/16 ,  F16H39/46

CPC分类号： F15B11/16 ,  F15B2211/20553 ,  F15B2211/25 ,  F15B2211/3116 ,  F15B2211/40515 ,  F15B2211/41509 ,  F15B2211/423 ,  F15B2211/455 ,  F15B2211/71

摘要： A fluid system (10, 10A, 10B) which supplies two work systems (26, 38) with respective different fluid flow rates, including a pressure-flow compensated pump (12), a first control valve (18) for delivering the fluid to one of the work systems, a second control valve (28) for receiving the fluid from the first control valve and delivering the fluid to the other of the work systems (38), a first device ([20,42,50] or [20,56,58] or [20,90,96]) coupled between the pump output and the first control valve, for providing one control signal causing the pump to produce one flow rate of fluid for activating the one work system (26), and a second device ([20,40,44,46,50] or [22,58,66,72,78] or [22,88,92,96,102]) for overriding the first device for providing another control signal causing the pump to produce another flow rate of fluid for actuating the other work system.

摘要翻译： 一种用于向两个工作系统（26,38）提供各自不同的流体流速的流体系统（10,10A，10B），包括压力流量补偿泵（12），用于将流体输送到 工作系统之一，用于从第一控制阀接收流体并将流体输送到另一个工作系统（38）的第二控制阀（28），第一装置（[20,42,50]或[ 20,56,58]或[20,90,96]），其耦合在所述泵输出和所述第一控制阀之间，用于提供一个控制信号，使所述泵产生用于激活所述一个工作系统（26）的一个流速的流体， 以及用于覆盖第一设备以提供另一控制信号的第二设备（[20,40,44,46,50]或[22,58,66,72,78]或[22,88,92,96,102]） 导致泵产生用于驱动另一个工作系统的另一流量的流体。

公开(公告)号：US4199944A

公开(公告)日：1980-04-29

申请号：US2844

申请日：1979-01-11

申请人： Tadeusz Budzich

发明人： Tadeusz Budzich

IPC分类号： F16H61/46 ,  F16H61/472 ,  F16H39/46

CPC分类号： F16H61/46 ,  F16H61/472 ,  Y10S60/911

摘要： A load responsive fluid power control system using servo type flow control valves and fluid motors supplied by a variable displacement pump. The pump displacement is either regulated by an electro-hydraulic control valve in response to an electrical signal proportional to motor load or the pump displacement is regulated to maintain a constant discharge pressure. The flow of pressurized fluid from the pump is automatically cut off from a servo type valve controlling a negative or aiding load once this load exceeds a certain minimum level and the inlet flow requirement of the actuator is supplied from a low pressure source bypassing the servo valve.

摘要翻译： 一种使用伺服型流量控制阀和由可变排量泵提供的流体马达的负载响应流体动力控制系统。 泵排量由电液控制阀调节，响应于与电机负载成比例的电信号，或调节泵排量以保持恒定的排放压力。 一旦该载荷超过一定的最低水平，来自泵的加压流体的流动将自动地从控制负载或辅助负载的伺服型阀切断，并且致动器的入口流量要求从绕过伺服阀的低压源 。