公开(公告)号：US4480963A

公开(公告)日：1984-11-06

申请号：US443416

申请日：1982-11-22

Applicant: Curtis P. Ring

Inventor： Curtis P. Ring

IPC: F04B49/00 ,  F16H61/40 ,  F16H61/4139 ,  F16H61/42

CPC classification number: F16H61/4139 ,  F04B49/002 ,  F16H61/42

Abstract: A hydrostatic drive system includes a hydraulic motor driven by a variable displacement axial piston pump with alternative intake and output ports. A charge pump generates a charge pressure which is communicated only to the pump intake port via a charge valve unit. The pump displacement is controlled by a swashplate which is moved by servo pistons which receive fluid from a displacement control valve. A three check valve unit communicates the higher of pump intake, outlet and charge fluid pressures to an inlet of the displacement control valve.

Abstract translation: 液压驱动系统包括由具有可选进气和输出端口的可变排量轴向柱塞泵驱动的液压马达。 充电泵产生通过充气阀单元仅与泵进气口连通的充气压力。 泵的位移由旋转斜盘控制，斜盘通过从容积控制阀接收流体的伺服活塞移动。 三通止回阀单元将较高的泵入口，出口和进料流体压力传递到排量控制阀的入口。

公开(公告)号：US4476680A

公开(公告)日：1984-10-16

申请号：US66499

申请日：1979-08-14

Applicant: Frederic W. Pollman ,  Stanley W. Crull

Inventor： Frederic W. Pollman ,  Stanley W. Crull

IPC: F04B49/10 ,  F04B49/00 ,  F04B49/08 ,  F16H39/00 ,  F16H61/42 ,  F16H61/433 ,  F16H61/439 ,  F16H61/46 ,  F16H39/46

CPC classification number: F16H61/439 ,  F04B49/002 ,  F16H61/433 ,  F16H61/46

Abstract: A pressure override control which utilizes pump output flow for destroking of a variable displacement pump to minimize loss of power and generation of heat and which includes modifications to the displacement control valve for the pump and, particularly, the cross connection of displacement-controlling servo motors when the displacement control valve is in a neutral position with blocking of communication of said servo motors to a displacement control pressure and drain whereby the pump cannot be positioned in a maximum displacement position in response to certain system malfunctions in the power override control circuitry.

Abstract translation: 一种压力超控控制器，其利用泵输出流量来排除可变排量泵以最小化功率损失和产生热量，并且包括对泵的排量控制阀的修改，特别是位移控制伺服电动机的交叉连接 当位移控制阀处于中断位置时，阻止所述伺服电动机的连通到位移控制压力和排放，由此响应于功率超控控制电路中的某些系统故障，泵不能位于最大位移位置。

公开(公告)号：US4475332A

公开(公告)日：1984-10-09

申请号：US350989

申请日：1982-02-22

Applicant: Ronald L. Anderson ,  John R. Harms

Inventor： Ronald L. Anderson ,  John R. Harms

IPC: F16H61/40 ,  F16H61/4104 ,  F16H61/42 ,  F16H61/437 ,  F16D31/02

CPC classification number: F16H61/4104 ,  F16H61/40 ,  F16H61/42 ,  F16H61/437

Abstract: A closed loop hydrostatic transmission is disclosed which includes an improved hydraulic fluid bleed arrangement. The fluid bleed arrangement includes a variable flow bleed valve hydraulically joined with each of the closed loops of the hydrostatic transmission. Each variable bleed valve is operatively associated with the control mechanism which selectively controls the reversible flow fluid pump of the closed loop for direction of fluid under pressure in forward and reverse directions in the loop. The variable action of each bleed valve permits a relatively greater amount of hydraulic fluid to be bled from the closed loop during periods of operation when the flow of hydraulic fluid otherwise lost from the closed loops is insufficient to permit adequate replenishment of fluid in the loops with cooler charging fluid. Additionally, the variable bleed valves of the system reduce the amount of fluid bled from the loops during periods of operation when a relatively high rate of hydraulic fluid bleed is not desired, thus permitting the charging system of the hydrostatic transmission to include a charging pump of relatively smaller displacement.

Abstract translation: 公开了一种闭环静液压传动装置，其包括改进的液压流体排放装置。 流体排放装置包括与静液压传动装置的每个闭环液压连接的可变流量排放阀。 每个可变泄放阀与控制机构可操作地相关联，该控制机构选择性地控制闭环回流流体泵的循环中在正向和反向压力下的流体的方向。 每个排放阀的可变作用允许相对较大量的液压流体在操作期间从闭合回路中流出，当液体流体从闭合回路中流出的液压流体不足以允许循环中的流体充分补充时， 冷却器充气流体。 此外，当不需要相对高的液压流体流失速率时，该系统的可变放气阀在操作期间减少从循环中流出的流体的量，从而允许静液压传动装置的充气系统包括： 相对较小的位移。

公开(公告)号：US4461147A

公开(公告)日：1984-07-24

申请号：US315381

申请日：1981-10-27

Applicant: H. Allen Myers

Inventor： H. Allen Myers

IPC: F16H61/42 ,  F16H61/433 ,  F16H61/46 ,  F16H61/47 ,  F16D31/02

CPC classification number: F16H61/47 ,  F16H61/433 ,  F16H61/46

Abstract: In the preferred form, the invention disclosed herein provides a single servo control valve to modulate the flow of control fluid to a servo mechanism of a variable displacement pump wherein the single valve is provided with both a manual primary input and an electro-hydraulic secondary input which modulates the primary input. The servo valve is spring biased toward a neutral position with the manual input displacement command being applied to such servo valve through a resilient linkage. Also applied to the servo valve is a hydraulic signal which is electrically controlled to modify the displacement of the servo valve relative to the yieldably applied manual input.

Abstract translation: 在优选形式中，本文公开的本发明提供了单个伺服控制阀，以将控制流体的流量调节到可变排量泵的伺服机构，其中单个阀具有手动主输入和电液压次级输入 其调制主要输入。 伺服阀被弹簧偏压到中性位置，手动输入位移指令通过弹性联动装置施加到这种伺服阀上。 也适用于伺服阀的液压信号是电控的，以改变伺服阀相对于可屈服应用的手动输入的位移。

公开(公告)号：US4392543A

公开(公告)日：1983-07-12

申请号：US238624

申请日：1981-02-26

Applicant: Norman O. Buckhouse ,  Aaron A. Stevens ,  Randall K. Lawrence

Inventor： Norman O. Buckhouse ,  Aaron A. Stevens ,  Randall K. Lawrence

IPC: B60K20/00 ,  F16H59/06 ,  F16H59/50 ,  F16H61/42 ,  F16H61/439

CPC classification number: F16H61/42 ,  B60K20/00 ,  F16H59/06 ,  F16H59/50 ,  F16H61/439 ,  F16H2061/168

Abstract: A speed control assembly is provided particularly for use in controlling the position of a hydrostatic transmission. An operator controlled lever is mounted for rotation about a shaft, and a portion of the lever is mounted for linear reciprocation with respect to the shaft. The shaft includes a disc cooperating with an annular electromagnet, the electromagnet when energized acting on the disc to latch the shaft so that it cannot be moved. When the control lever portion is reciprocated with respect to the shaft, the electromagnet is de-energized and the shaft may be rotated to act through a lever assembly to control the position of a hydrostatic transmission. Electric switches are mounted responsive to the driver's seat occupancy and to application of the brakes so that if the driver's seat is vacated or the brakes are applied the electromagnet is de-energized. When the electromagnet is de-energized, springs bias the control lever to a neutral position.

Abstract translation: 提供了一种速度控制组件，特别用于控制静液压传动装置的位置。 安装操作者控制杆以围绕轴旋转，并且杆的一部分安装成相对于轴线性地往复运动。 轴包括与环形电磁体配合的盘，当通电时电磁铁作用在盘上以使轴不能移动。 当控制杆部分相对于轴往复运动时，电磁体被断电，并且轴可以旋转以通过杆组件作用以控制静液压传动的位置。 电动开关响应于驾驶员的座位和制动器的应用而安装，以便如果驾驶员座椅空出或制动器被施加，则电磁铁被断电。 当电磁铁断电时，弹簧将控制杆偏置到中立位置。

公开(公告)号：US4382360A

公开(公告)日：1983-05-10

申请号：US187579

申请日：1980-09-15

Applicant: Robert E. Dummer

Inventor： Robert E. Dummer

IPC: F16H61/40 ,  F16H61/4157 ,  F16H61/42 ,  F16H61/433 ,  F16H39/46

CPC classification number: F16H61/4157 ,  F16H61/40 ,  F16H61/42 ,  F16H61/433

Abstract: A closed loop hydraulic swing circuit is provided with crossover auxiliary actuating connections between the pump control lines and the system relief valves to cause the relief valves to open at lower than maximum system pressure in an unloading action that limits braking when a coasting load is causing the motor to return more fluid than the pump can accept.

Abstract translation: 闭路液压摆动回路在泵控制线路和系统安全阀之间设置有交叉辅助动作连接，以在卸载动作中以低于最大系统压力打开安全阀，当卸载动作导致惯性负载导致制动时 电机返回的液体比泵更能接受。

公开(公告)号：US4346617A

公开(公告)日：1982-08-31

申请号：US163553

申请日：1980-06-27

Applicant: Philip W. Schroeder ,  Edgar K. Lindstrom

Inventor： Philip W. Schroeder ,  Edgar K. Lindstrom

IPC: F16H59/02 ,  F16H61/42 ,  F16H61/437 ,  F16H61/439 ,  F16H63/08 ,  G05G11/00 ,  G05G1/14

CPC classification number: F16H61/439 ,  F16H59/02 ,  F16H61/42 ,  F16H61/437 ,  F16H63/08 ,  Y10T74/2022

Abstract: A drive control is disclosed which is particularly useful for machines having a hydrostatic transmission or ground drive pump, such as a tractor. A shift assembly controls the input to the hydrostatic transmission, and it includes a shift lever which is movable by a bellcrank mechanism in opposite directions from a neutral position into forward or reverse. The drive control further includes a rocking foot pedal which is connected by an actuating linkage to both the shift lever and the hydrostatic transmission. The desired direction of operation is set with the shift assembly, and the speed of movement in the selected direction is proportional to the amount the foot pedal is depressed. The foot pedal assembly includes a heel tab actuator which can be used as a manual override for the purpose of braking by bringing the hydrostatic transmission back to neutral while maintaining the transmission in the selected directional position. An automatic override mechanism is also provided such that when the foot pedal is released, for any reason, the automatic override mechanism returns the hydrostatic transmission to neutral without affecting the directional position setting. A further feature of the invention resides in the selector plate for directional control which includes a projection for actuating a neutral start switch.

Abstract translation: 公开了一种驱动控制器，其特别适用于具有液压传动或地面驱动泵（例如拖拉机）的机器。 变速组件控制静液压变速器的输入，并且其包括变速杆，变速杆可通过曲拐机构从相对方向从中立位置向前或向后移动。 驱动控制还包括摇动脚踏板，其通过致动联动件连接到变速杆和静液压传动两者。 所需的操作方向由换档组件设定，所选方向的移动速度与踏板被压下的量成比例。 脚踏板组件包括脚跟突片致动器，其可以通过使静液压传动回到空档而被用作手动超驰，同时将变速器保持在所选择的方向位置。 还提供了一种自动超驰机构，使得当脚踏板被释放时，由于任何原因，自动超驰机构使静液压变速器返回中立而不影响方向位置设定。 本发明的另一个特征在于用于方向控制的选择器板，其包括用于致动中立起动开关的突起。

公开(公告)号：US4236422A

公开(公告)日：1980-12-02

申请号：US62639

申请日：1979-08-01

Applicant: Gary L. Cochran ,  Charles D. Wilson ,  Maurice Klee

Inventor： Gary L. Cochran ,  Charles D. Wilson ,  Maurice Klee

IPC: F16H61/42 ,  F16H61/437 ,  G05G1/00

CPC classification number: F16H61/42 ,  F16H61/437 ,  Y10T74/20006 ,  Y10T74/20438 ,  Y10T74/2045

Abstract: A fluid pump control for a tractor having a fluid pump controlled by an operator's handle connected to the pump by force-responsive members which do not transmit the pump vibration to the handle. The control is for a tractor transmission driven through a variable displacement pump which inherently develops vibrations. The handle is a pivotally mounted lever and the connections between the handle and the pump are four cables, and two intervening compression springs, all for transmitting the force on the lever to the pump while avoiding transmitting the pump vibrations back to the lever. The springs also are arranged with the cables to automatically return the pump to a neutral position when the operator releases hand force on the lever.

Abstract translation: 一种用于拖拉机的流体泵控制器，其具有由操作者手柄控制的流体泵，该操作者手柄通过不将泵振动传递到手柄的力响应构件连接到泵。 该控制是用于通过可变排量泵驱动的牵引车变速器，该变量泵固有地产生振动。 手柄是一个枢轴安装的杠杆，手柄和泵之间的连接是四根电缆，两个中间的压缩弹簧，全部用于将杠杆上的力传递到泵，同时避免将泵振动传回到杠杆。 当操作者在杠杆上释放手力时，弹簧还布置有电缆以自动将泵返回到中立位置。

公开(公告)号：US4217789A

公开(公告)日：1980-08-19

申请号：US886785

申请日：1978-03-15

Applicant: Walter F. Larson

Inventor： Walter F. Larson

IPC: B60K26/00 ,  F16H61/42 ,  G05G11/00

CPC classification number: B60K26/00 ,  F16H61/42 ,  Y10T74/20006 ,  Y10T74/20226

Abstract: A wheeled frame which is hydraulically powered and which will operate in either forward or reverse direction, with an over-ride control means to enable the wheeled frame to be driven in either direction, stopped and restarted in the same direction at the same speed by manipulation of the variable control means to vary the hydraulically powered fluid motor means to drive the wheeled frame from zero to maximum speed with the controls in one position and from zero to maximum speed with the controls in another position.

Abstract translation: 液压驱动的轮式框架，其可以在正向或反向方向上操作，具有过载控制装置，以使得轮式框架能够以相同的速度在任一方向上以相同方向以相同的方向被驱动，通过操纵以同样的方向重新起动 的变量控制装置来改变液压动力流体马达装置，以使控制在一个位置，从零到最大速度，将驱动框架从零到最大速度，同时控制在另一个位置。

公开(公告)号：US4211079A

公开(公告)日：1980-07-08

申请号：US33769

申请日：1979-04-27

Applicant: Arvid H. Saele ,  Donald O. Johannsen

Inventor： Arvid H. Saele ,  Donald O. Johannsen

IPC: F04B1/26 ,  F16H61/42 ,  F16H61/439 ,  F16H39/46

CPC classification number: F16H61/437 ,  F16H61/42 ,  F16H61/439

Abstract: A hydrostatic transmission includes a reversible, variable displacement pump having a swashplate actuator controlled by a pilot-operated displacement control valve. A manually operated displacement control lever is manipulated to opposite sides of a neutral position to effect command signals for causing pilot operation of the displacement control valve to control movement of the swashplate in accordance with the command. A neutral control valve is coupled to the displacement control lever and is operated thereby to a neutral position, wherein it connects the swashplate actuator to sump, when the lever is moved to its neutral position.

Abstract translation: 静液压变速器包括一个可逆排量泵，其具有由先导操作的排量控制阀控制的斜盘致动器。 手动操作的位移控制杆被操纵到中立位置的相对侧，以实现指令信号，以使位移控制阀的先导操作根据命令来控制斜盘的运动。 中性控制阀联接到位移控制杆并且由此操作到中立位置，其中当杠杆移动到其中立位置时，其将斜盘致动器连接到贮槽。