公开(公告)号：US4716983A

公开(公告)日：1988-01-05

申请号：US822829

申请日：1986-01-27

申请人： Frederick J. Adams ,  Kenneth Chandler

发明人： Frederick J. Adams ,  Kenneth Chandler

IPC分类号： B62D5/06 ,  B62D5/22 ,  B62D6/10 ,  B62D5/00

CPC分类号： B62D6/10

摘要： A steering system has annular pressure responsive electric components, such as piezo-electric transducers, mounted between thrust and restraining faces respectively, the transducers respond to a mechanical load applied to them by generating or determining electrical signals which are proportional to the load, the signals are supplied to a comparator by way of electrical connections. The transducers are arranged in pairs on the axially opposed faces of a bearing, so that in response to an axial thrust applied to the bearing by an input shaft of a steering gear incorporated in the system, the signals provided by the transducers will change from a predetermined comparative condition, one signal increasing in response to the increased compressive load on one transducer, the other signal decreasing in response to a decrease in compressive load on the other transducer in the pair. The predetermined comparative condition is established by compressing the transducer pair during installation by means of a retaining cap, which is screw threadedly connected to a housing. The changes in the electrical signal enable the comparator to determine the magnitude and direction of the thrust and to use this information for monitoring or control purposes.

摘要翻译： 转向系统具有分别安装在推力和限制面之间的环形压力响应电气部件，例如压电换能器，换能器通过产生或确定与负载成比例的电信号来响应施加到它们的机械负载，信号 通过电气连接提供给比较器。 换能器成对地布置在轴承的轴向相对的表面上，使得响应于由系统中的转向装置的输入轴施加到轴承的轴向推力，换能器提供的信号将从 预定的比较条件，一个信号响应于一个换能器上的增加的压缩载荷而增加，另一个信号响应于该对中的另一个换能器上的压缩载荷的减小而减小。 通过在安装期间通过螺纹连接到壳体的保持盖压缩换能器对来建立预定的比较条件。 电信号的变化使比较器能够确定推力的大小和方向，并将此信息用于监控或控制目的。

公开(公告)号：US4580651A

公开(公告)日：1986-04-08

申请号：US654382

申请日：1984-09-25

申请人： Frederick J. Adams

发明人： Frederick J. Adams

IPC分类号： B62D5/06 ,  B62D5/07 ,  B62D5/22

CPC分类号： B62D5/06

摘要： A power assistance steering system for a vehicle, including a fluid pump which directs fluid pressure selectively to a movement assistance device to assist steering and a prime mover for driving the pump through a microprocessor in accordance with signals generated by a sensor responsive to steering torque.

摘要翻译： 一种用于车辆的动力辅助转向系统，包括流体泵，其将流体压力选择性地引导到运动辅助装置以辅助转向，以及原动机，其根据由传感器响应于转向转矩产生的信号通过微处理器驱动泵。

公开(公告)号：US4322986A

公开(公告)日：1982-04-06

申请号：US95451

申请日：1979-11-19

申请人： Frederick J. Adams ,  Philip A. Downing

发明人： Frederick J. Adams ,  Philip A. Downing

IPC分类号： B62D3/12 ,  F16H19/00 ,  F16H55/28 ,  F16H57/12 ,  F16H27/02 ,  F16H1/04 ,  F16H29/20

CPC分类号： F16H19/04 ,  B62D3/123 ,  F16H55/283 ,  F16H55/285 ,  Y10T74/18816 ,  Y10T74/1967

摘要： A variable ratio rack and pinion gear having a rack bar (1) the rack (8) of which engages with the pinion (10) so that rotation of the pinion displaces the rack member (1) longitudinally relative to the housing (6). A yoke (25) supports the member (1) with its teeth in engagement with the pinion and straddles the member (1) to restrain displacement of that member relative to the housing (6) in a direction parallel to the axis of rotation for the pinion (10). The rack member is restrained from rotation relative to the housing, and (1) has a longitudinally extending non-rectilinear grooved track of one or more curved portions (14) which is engaged by a peg (17) rotatably carried in a mounting block (21). The block (21) retains the yoke (25) in the housing with the peg (17) located within and extending through the yoke (25). The peg (17) engages with the track (14) so that during longitudinal displacement of the rack member (1) the reaction between the groove (14) and peg (17) imparts limited controlled rotation to the member (1) to vary the ratio of the gear. Consequently, by appropriately shaping the track the gear assembly can be provided with a predetermined variable gear ratio. For example, the track may be a helix of variable pitch to provide the variable gear ratio. The peg can rotate in its mounting block (21) to alleviate friction between the peg and rack member (1) during displacement of the latter and can be spring biased to urge and support the rack member for engagement with the pinion.In a modification, the grooved track (14) is engaged by the peripheral edge of a rotatably mounted roller or wheel located within the yoke so that engagement between the roller and rack member (1) imparts rotation to the rack member to vary the gear ratio during displacement of the rack member.The teeth of the rack member can extend part way only around the periphery of that member while the non-toothed peripheral portion provides a slideway within which the groove (14) is machined and with which the yoke (25) slidably engages.

公开(公告)号：US4305306A

公开(公告)日：1981-12-15

申请号：US084134

申请日：1979-10-12

申请人： Frederick J. Adams

发明人： Frederick J. Adams

IPC分类号： F16H15/10 ,  F16H61/662 ,  F16H15/08

CPC分类号： F16H61/6646 ,  F16H15/10

摘要： A rotatable input shaft (1) drives a rotatable output shaft (18) through a roller (7) which roller is displaceable along its rotational axis (8) while maintaining driving engagement with drive faces (6 and 14) of the shafts (1 and 18) respectively to vary the drive ratio through the assembly. The roller (7) is controlled in its displacement by a piston and cylinder device (10, 11) to which fluid pressure is directed under control of a spool valve (22). The spool (26) of valve (22) is displaceable to determine fluid flow towards and from the piston chambers (12 and 13) of the piston and cylinder device under control of the speed of rotation of the output shaft (18) through a centrifugal governor (34) and a push rod (33) reacting between the spool (26) and the governor (34). If the rotational speed of shaft (18) varies substantially from a predetermined value (for example by variations in rotational speed of the input shaft (1)) the governor (34) reacts to displace the spool (26) in a manner which directs fluid pressure to piston chambers (12 and 13) and displaces the roller (7) in a sense to increase or decrease the mechanical advantage at which drive is transmitted between the input and output shafts to adjust the rotational speed of the output shaft (18) and maintain it substantially constant.

摘要翻译： 可旋转输入轴（1）通过辊（7）驱动可旋转的输出轴（18），该辊可沿其旋转轴线（8）移动，同时保持与轴（1和6）的驱动面（6和14）的驱动接合 18）以通过组件改变驱动比。 通过活塞和气缸装置（10,11）控制辊（7）的位移，在滑阀（22）的控制下流体压力被引导到该活塞和气缸装置（10,11）。 阀（22）的阀芯（26）可移动，以在输出轴（18）通过离心机（18）的旋转速度的控制下确定朝向和来自活塞和气缸装置的活塞室（12和13）的流体流动 调节器（34）和在所述线轴（26）和调速器（34）之间作用的推杆（33）。 如果轴（18）的转速基本上从预定值（例如通过输入轴（1）的转速的变化）变化），则调速器（34）以引导流体的方式使阀芯（26）移动 压力到活塞室（12和13）并且在某种意义上使辊（7）移位以增加或减少驱动在输入和输出轴之间传递的机械优点，以调节输出轴（18）的转速和 保持其基本恒定。

公开(公告)号：US4227549A

公开(公告)日：1980-10-14

申请号：US930065

申请日：1978-08-01

申请人： Frederick J. Adams

发明人： Frederick J. Adams

IPC分类号： B62D5/087 ,  B62D5/06 ,  F15B13/14 ,  F15B13/04

CPC分类号： B62D5/061 ,  F15B13/14 ,  Y10T137/8671

摘要： A fluid pressure control valve and a steering gear including such valve. The valve including a spool assembly (100) having first (5) and second (10) spool parts and which is axially displaceable in a spool housing (101) to control flow of fluid under pressure from a pressurized port (1) to an actuating port (8) intended for communication with a ram. The first and second spool parts (5, 10) form a reaction chamber (105) the volume of which is variable. The spool parts (5, 10) can be connected by a pin and slot mechanism (108, 14) so that the chamber (105) has maximum and minimum volumes. Control means (4) acts on one (5) of the spool parts for manually displacing the spool assembly in one axial direction to open communication between said pressurized port (1) and the actuating port (8). A biasing spring (12) opposes axial displacement of the other (10) of the spool parts in the one axial direction. The reaction chamber (105) communicates with the actuating port (8) when that port (8) communicates with the pressurized port (1) and upon pressurization of the reaction chamber (105) by its communication with the pressurized port the other spool part (10) reacts against the biasing spring (12) to oppose and provide a reaction to the manual force which is applied to displace the spool assembly (100) in one axial direction.A secondary spring (9) which is weaker than the biasing spring (12) biases the reaction chamber (105) to its expanded condition. The valve can be double acting to be displaceable from a neutral condition and in either sense of axial direction to control fluid flow to one or the opposite sides of a ram; in the neutral condition both sides of the ram may communicate through the valve with exhaust.

摘要翻译： 一种流体压力控制阀和包括这种阀的舵机。 阀包括具有第一（5）和第二（10）卷轴部分的卷轴组件（100），并且其可在卷轴壳体（101）中轴向移位，以控制压力下的流体从加压端口（1）到致动 端口（8）用于与压头通信。 第一和第二卷轴部分（5,10）形成其体积可变的反应室（105）。 阀芯部件（5,10）可以通过销和槽机构（108,14）连接，使得腔室（105）具有最大和最小的体积。 控制装置（4）作用于一个（5）的卷筒部件，用于在一个轴向方向上手动移动卷筒组件，以打开所述加压端口（1）和致动端口（8）之间的连通。 偏置弹簧（12）在一个轴向上相对于卷轴部件中另一个（10）的轴向位移。 当该端口（8）与加压端口（1）连通时，并且当反应室（105）与加压端口连通时，反应室（105）与致动端口（8）连通，另一个卷轴部分 10）反作用于偏置弹簧（12）以对应于在一个轴向方向上移动滑阀组件（100）而施加的手动力的反作用力。 比偏置弹簧（12）弱的次级弹簧（9）将反应室（105）偏压到其膨胀状态。 阀可以双重作用以从中性条件和任何轴向方向移动，以控制流体流到冲头的一侧或相对侧; 在中立状态下，压头的两侧可以通过阀与排气口连通。

公开(公告)号：US4865150A

公开(公告)日：1989-09-12

申请号：US186047

申请日：1988-04-25

申请人： Frederick J. Adams

发明人： Frederick J. Adams

IPC分类号： B62D5/22

CPC分类号： B62D5/087 ,  B62D5/22

摘要： In a power assisted rack and pinion vehicle steering mechanism, a rack and a pinion engage within a housing. The pinion is mounted on a pinion shaft which is journalled in bearings in a cage. A lever is fixed to the cage and projects from the cage through the housing. The lever has a part-spherical seating portion which engages a part-spherical seat in the housing. Spring means biases the rack into engagement wiht the pinion, and through the cage biases the part-spherical seating portion of the lever into engagement with the seat on the housing. Steering torque imparted on the pinion moves the rack axially and causes a reaction on the pinion which rotates the cage about the center of the part-spherical seating portion. This rocks the lever to actuate power assistance means.

公开(公告)号：US4651841A

公开(公告)日：1987-03-24

申请号：US694338

申请日：1985-01-24

申请人： Frederick J. Adams

发明人： Frederick J. Adams

IPC分类号： B62D5/30 ,  B62D5/06

CPC分类号： B62D5/30

摘要： A power assistance steering system for a vehicle, particularly a heavy vehicle, having a first power assistance subsystem known per se and a second power assistance subsystem including a fluid pump for directing fluid pressure selectively to a movement assistance device to assist steering and a prime mover for driving the pump in accordance with signals generated by a sensor responsive to steering.

摘要翻译： 一种用于车辆，特别是重型车辆的动力辅助转向系统，其具有本身已知的第一动力辅助系统和包括用于将流体压力选择性地引导到运动辅助装置以辅助转向和原动机的流体泵的第二动力辅助系统 用于根据响应于转向的传感器产生的信号驱动泵。

公开(公告)号：US4627509A

公开(公告)日：1986-12-09

申请号：US727822

申请日：1985-04-26

申请人： Frederick J. Adams ,  Kenneth J. D. Heap

发明人： Frederick J. Adams ,  Kenneth J. D. Heap

IPC分类号： B62D5/07 ,  B62D5/06

CPC分类号： B62D5/06

摘要： A power assistance steering system 10 for a vehicle comprises steering gear 12 having an internal hydraulic ram supplied with hydraulic fluid by a pump 14 from a reservoir 16 via a solenoid valve 18 controlled by a micro-processor 20 which also controls an electric motor 22 for driving pump 14. Steering input torque is sensed by a torque sensor 36 and steering direction is sensed by a direction switch 34. Output signals from these devices are fed to micro-processor 20 which controls solenoid valve 18 and pump motor 22 accordingly, varying the motor speed in accordance with the pressure requirements of the steering ram as sensed by the torque sensor. In a further embodiment the pump is driven at a constant speed and a proportional control valve 74 is controlled by a micro-processor 78 to vary the fluid pressure supply.

摘要翻译： 用于车辆的动力辅助转向系统10包括转向齿轮12，转向齿轮12具有由泵14从泵14经由电控阀18经由微处理器20控制的电磁阀18从储液器16供给液压流体的内部液压油缸，该控制器也控制电动机22， 驱动泵14.由转矩传感器36检测转向输入转矩，并通过方向开关34检测转向方向。这些装置的输出信号被馈送到微处理器20，微处理器20相应地控制电磁阀18和泵马达22， 电机转速根据扭矩传感器感应到的转向柱塞的压力要求而定。 在另一实施例中，泵以恒定速度驱动，并且比例控制阀74由微处理器78控制以改变流体压力供应。

公开(公告)号：US4625624A

公开(公告)日：1986-12-02

申请号：US677063

申请日：1984-11-30

申请人： Frederick J. Adams

发明人： Frederick J. Adams

IPC分类号： B62D5/30 ,  F15B13/06

CPC分类号： B62D5/30

摘要： A power assisted steering system and a steering assembly for such a system. The steering assembly has a steering output comprising an arm 6 displaceable through a toothed sector 7 by a racked piston nut 3 drivingly engaging a worm shaft 7 rotatable by a steering input shaft 12. The piston 3 and its cylinder 2 provides a first servomotor for power assisting the steering output. The first servomotor is powered by a first hydraulic system 16 comprising a rotary valve 10 which is responsive to the steering input to control fluid pressure to the first servomotor. The steering system also includes a second hydraulic system 25 comprising an axially responsive spool valve 21 which controls fluid pressure to operate a second servomotor 28 coupled to the steering output arm 6. The rotary and axially responsive valves 10 and 21 are axially coupled together by the shaft 7 which is axially displaceable to control operation of the valve 21. Axial biasing springs 34 and 35 axially spring load the shaft 7 to a neutral condition for the valve 21. During use of the steering assembly the resistance to displacement of the piston 3 by the drive imparted thereto from the worm shaft 7 serves to provide a reaction on the shaft 7 which displaces the shaft against its spring biasing to operate the valve 21 and provide power assistance through the system 25 and ram 28. This power assistance may be effected prior to, simultaneously with or subsequent to power assistance provided by the servomotor comprising the piston 3 powered by operation of the rotary valve and from the hydraulic system 16. If required, both hydraulic systems 16 and 25 can be used to power a single and common servomotor.

摘要翻译： 用于这种系统的动力辅助转向系统和转向组件。 转向组件具有转向输出，该转向输出包括臂6，其可通过齿条活塞螺母3移动通过齿形扇区7，该活塞螺母3驱动地接合由转向输入轴12旋转的蜗杆7.活塞3及其气缸2提供用于功率的第一伺服电动机 协助转向输出。 第一个伺服电机由第一液压系统16驱动，液压系统16包括响应于转向输入以控制对第一伺服电动机的流体压力的旋转阀10。 转向系统还包括第二液压系统25，其包括轴向响应的滑阀21，其控制流体压力以操作耦合到转向输出臂6的第二伺服电动机28.旋转和轴向响应阀10和21通过 轴7，其可轴向移动以控制阀21的操作。轴向偏压弹簧34和35轴向地将轴7弹簧加载到阀21的中性状态。在使用转向组件期间，活塞3的位移阻力通过 从蜗杆轴7向其施加的驱动力用于在轴7上提供反作用力，该反作用力抵靠其弹簧偏压来移动轴以操作阀21，并通过系统25和冲头28提供动力辅助。该动力辅助可以在 由包括通过旋转阀和fr的操作供电的活塞3的伺服电动机提供的动力辅助同时或之后 液压系统16.如果需要，液压系统16和25都可用于为单个和公共伺服电机供电。

公开(公告)号：US4429621A

公开(公告)日：1984-02-07

申请号：US255557

申请日：1981-04-20

申请人： Frederick J. Adams

发明人： Frederick J. Adams

IPC分类号： B62D5/07 ,  B62D5/08 ,  F15B11/08 ,  F15B13/04 ,  F16K31/12

CPC分类号： B62D5/08 ,  Y10T137/7788 ,  Y10T137/87185

摘要： An hydraulic system: a power assisted vehicle steering system which includes such an hydraulic system and a method of alleviating noise in an hydraulic system. The hydraulic system as applied to a vehicle steering gear (1) has an open center valve (3) which directs hydraulic fluid under pressure derived from a pump (12) and in response to a steering maneuver through a shaft (4) to a servo motor of the gear (1). Downstream of the open center valve (3) is a restrictor (8) through which hydraulic fluid from the valve (3) passes to a reservoir (11). The restriction effected by the restrictor (8) to fluid flow from the valve (3) to the reservoir is variable to provide a throttling action and a back pressure in the line (6) to alleviate noise in the valve (3).

摘要翻译： 液压系统：包括这种液压系统的动力辅助车辆转向系统和减轻液压系统噪声的方法。 应用于车辆舵机（1）的液压系统具有打开的中心阀（3），其在来自泵（12）的压力下引导液压流体，并响应于通过轴（4）的转向操纵到伺服 齿轮（1）的电机。 开放中心阀（3）的下游是限流器（8），来自阀（3）的液压流体通过该限流器通向储液器（11）。 限制器（8）对从阀（3）流向储存器的流体流动的限制是可变的，以在管线（6）中提供节流作用和背压以减轻阀（3）中的噪声。