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公开(公告)号：US5284219A
公开(公告)日：1994-02-08
申请号：US826043
申请日：1992-01-27
申请人： Yasuo Shimizu , Toshitake Kawai , Junji Yuzuriha
发明人： Yasuo Shimizu , Toshitake Kawai , Junji Yuzuriha
CPC分类号： B62D1/166
摘要： A steering apparatus steers a steerable road wheel in response to turning movement of a steering wheel with a variable steering angle ratio therebetween. The steering apparatus includes a first member operatively coupled to either one of the steerable road wheel and the steering wheel, and a second member operatively coupled to the other of the steerable road wheel and the steering wheel. The first member has a portion engaging the second member at a variable engaging position that is movable on a predetermined path. The steering angle ratio varies when the engaging position varies. When the steering angle ratio varies with the first and second members in their respective neutral positions, the first and second members remain completely still, and their neutral positions are kept in alignment with each other.
摘要翻译： 转向装置响应于其间具有可变转向角比的方向盘的转动运动而引导可转向的车轮。 转向装置包括可操作地联接到可操纵的车轮和方向盘之一的第一构件以及可操作地联接到可转向的车轮和方向盘的另一个的第二构件。 第一构件具有在可在预定路径上移动的可变接合位置处接合第二构件的部分。 当接合位置变化时，转向角比变化。 当转向角比随着第一和第二构件在其各自的中立位置变化时，第一和第二构件保持完全静止，并且它们的中立位置保持彼此对齐。
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公开(公告)号：US5489004A
公开(公告)日：1996-02-06
申请号：US379988
申请日：1995-01-27
申请人： Yasuo Shimizu , Toshitake Kawai , Shigeru Tajima
发明人： Yasuo Shimizu , Toshitake Kawai , Shigeru Tajima
CPC分类号： B62D1/166
摘要： In a variable ratio steering system, the input shaft is rotatably supported by a support member which is in turn rotatably supported by a casing, and the axial lines of these two parts extend in parallel with each other, and are offset from each other. While the point of action between the input shaft and the output shaft is fixed relative to the output shaft, the distance between the point of action and the axial center line of the input shaft changes in dependence on both the angular position of the support member and the amplitude of the input angle. Thus, by appropriately determining the relative relationships between the axial lines of the input and output shafts and a rotatable range of the support member, it is possible to achieve a desired non-linear relationship between the rotational angles of the input shaft and the output shaft. It is therefore possible to improve the handling of the vehicle, for instance in parking the vehicle in a small space, and steer the vehicle with a least amount of effort in a low speed range, and to increase the stability of the vehicle in a high speed range. Furthermore, this can be achieved with a highly simple and play-free structure.
摘要翻译： 在变比转向系统中，输入轴可旋转地支撑在支撑部件上，支撑部件又由壳体可旋转地支撑，并且这两个部分的轴线彼此平行地延伸并彼此偏移。 虽然输入轴和输出轴之间的作用点相对于输出轴固定，但是作用点与输入轴的轴线中心线之间的距离根据支撑构件的角位置和 输入角度的幅度。 因此，通过适当确定输入轴和输出轴的轴线和支撑构件的可旋转范围之间的相对关系，可以实现输入轴和输出轴的旋转角度之间的期望的非线性关系 。 因此，可以改善车辆的处理，例如在较小的空间内停放车辆，并且以低速度的努力转向车辆，并且以高的速度增加车辆的稳定性 速度范围 此外，这可以通过非常简单和无游隙的结构来实现。
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公开(公告)号：US4742882A
公开(公告)日：1988-05-10
申请号：US24047
申请日：1987-03-10
申请人： Yasuo Shimizu , Toshitake Kawai , Mitsutaka Sugino
发明人： Yasuo Shimizu , Toshitake Kawai , Mitsutaka Sugino
IPC分类号： B62D5/04
CPC分类号： B62D5/0448 , B62D5/0424 , B62D5/0427
摘要： A motor-driven power steering device includes an electric motor for generating assistive torque which is applied through a ball screw mechanism to a steering gear mechanism to reduce manual steering forces applied by the driver to steer a motor vehicle. The motor-driven power steering device comprises a rack-and-pinion steering gear mechanism for converting the rotation of a pinion shaft to axial movement of a rack shaft, an electric motor for generating assistive torque to be applied to the rack-and-pinion steering gear mechanism, and a ball screw mechanism for converting the assistive torque from the motor to the axial movement of the rack shaft. The ball screw mechanism has a screw shaft having a helical groove defined in an outer peripheral surface thereof and extending substantially parallel to the rack shaft, the screw shaft being receptive of the assistive torque generated by the motor, a nut having a helical groove defined in an inner peripheral surface thereof and disposed around the screw shaft, the nut being nonrotatably coupled to the rack shaft, and a plurality of balls disposed in and between the helical grooves of the screw shaft and the nut.
摘要翻译： 电动动力转向装置包括用于产生通过滚珠丝杠机构施加到舵机机构的辅助扭矩的电动机，以减少由驾驶员施加的驾驶员引导机动车辆的手动转向力。 马达驱动的动力转向装置包括用于将小齿轮轴的旋转转换成齿条轴的轴向运动的齿轮齿条转向齿轮机构，用于产生施加到齿条和齿轮的辅助扭矩的电动机 舵机机构和用于将来自马达的辅助扭矩转换成齿条轴的轴向运动的滚珠丝杠机构。 滚珠丝杠机构具有螺旋轴，该螺旋轴具有限定在其外周表面中并且基本上平行于齿条轴延伸的螺旋槽，螺杆轴接受由马达产生的辅助扭矩，螺母具有限定在 其内周面并设置在螺杆轴周围，螺母不可旋转地联接到齿条轴，以及多个球，其设置在螺杆轴和螺母的螺旋槽之中并在其之间。
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4.发明授权Electric power steering apparatus having steering torque sensor integrally assembled in steering device with variable steering ratio 失效电动助力转向装置具有一体式组装在具有可变转向比的转向装置中的转向扭矩传感器
公开(公告)号：US6000491A
公开(公告)日：1999-12-14
申请号：US36840
申请日：1998-03-09
申请人： Yasuo Shimizu , Toshitake Kawai , Jyunji Yuzuriha
发明人： Yasuo Shimizu , Toshitake Kawai , Jyunji Yuzuriha
摘要： An electric power steering apparatus includes a steering torque sensor assembled integrally with a steering device having a variable steering ratio. The steering device includes an input shaft eccentrically and rotatably mounted in a movable housing rotatably supported on a fixed housing, an output shaft rotatably mounted in the fixed housing in eccentric relation to the input shaft, a coupling relatively non-rotatably interconnecting the input and output shafts while allowing them to move relatively to one another in a perpendicular direction of axes of the input and output shafts, and a drive mechanism for rotating the movable housing relatively to the fixed housing to displace the input shaft relatively to an axis of the movable housing so that the eccentricity between the input and output shafts changes to vary the steering ratio of the steering device. The input shaft includes a first shaft connected to a steering wheel, a second shaft connected to the output shaft via the coupling, and a torsion bar connecting the first and second shafts while permitting relative torsional displacement between the first and second shafts. The steering torque sensor includes a slider engaged with the first and second shafts and axially displaceable in response to relative torsional displacement between the first and second shafts, and a coil attached to the movable housing for converting the amount of axial displacement of the slider into a corresponding electric signal.
摘要翻译： 电动助力转向装置包括与具有可变转向比的转向装置整体组装的转向转矩传感器。 转向装置包括偏心且可旋转地安装在可旋转地支撑在固定壳体上的可移动壳体中的输入轴，与输入轴偏心地可转动地安装在固定壳体中的输出轴，相对不可旋转地将输入和输出 轴，同时允许它们在输入和输出轴的轴线的垂直方向上彼此相对移动;以及驱动机构，用于相对于固定壳体旋转可移动壳体，以相对于可移动壳体的轴线移动输入轴 使得输入和输出轴之间的偏心度改变以改变转向装置的转向比。 输入轴包括连接到方向盘的第一轴，经由联轴器连接到输出轴的第二轴，以及连接第一和第二轴的扭杆，同时允许第一和第二轴之间的相对扭转位移。 所述转向扭矩传感器包括与所述第一和第二轴接合的滑块，并且响应于所述第一和第二轴之间的相对扭转位移而可轴向移动，以及附接到所述可移动壳体的线圈，用于将所述滑块的轴向位移量转换为 相应的电信号。
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公开(公告)号：US4727950A
公开(公告)日：1988-03-01
申请号：US077961
申请日：1987-07-27
申请人： Yasuo Shimizu , Toshitake Kawai
发明人： Yasuo Shimizu , Toshitake Kawai
CPC分类号： B62D5/0469
摘要： An electric power steering system (200) for vehicles including a driving control circuit (76, 100, 108) for feeding, in consideration of an output signal (S.sub.1, S.sub.2) from a steering torque detection mechanism (77) for detecting steering torque (Ts) acting on an input shaft (4), a drive signal (Va) to an electric motor (33) for producing auxiliary torque to be supplied to an output shaft (7). In the steering system, the auxiliary torque to be developed at the electric motor (33) is reduced, under the condition that a steering angle (Th) of the steering wheel has exceeded a predetermined angle (Th.sub.1).
摘要翻译： 一种用于车辆的电动助力转向系统（200），其包括驱动控制电路（76,100,108），用于考虑来自用于检测转向转矩的转向转矩检测机构（77）的输出信号（S1，S2） Ts），用于产生供给到输出轴（7）的辅助转矩的电动机（33）的驱动信号（Va）。 在转向系统中，在方向盘的转向角（Th）超过预定角度（Th1）的条件下，减小了在电动机（33）处产生的辅助转矩。
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公开(公告)号：US4651840A
公开(公告)日：1987-03-24
申请号：US832944
申请日：1986-02-26
申请人： Yasuo Shimizu , Toshitake Kawai
发明人： Yasuo Shimizu , Toshitake Kawai
CPC分类号： B62D5/0463 , B62D5/0478 , B62D6/02 , B60G2202/135 , B60G2202/42
摘要： The assistive torque generated by a motor or the torque transmitted by a clutch when the speed of travel of a motor vehicle is increased beyond a prescribed value while a steering torque is being applied, is reduced with time from a predetermined value. The assistive torque generated by the motor or the torque transmitted by the clutch when the speed of the motor vehicle is reduced below the prescribed value while the steering torque is being applied, is increased with time up to the predetermined value. Therefore, when the speed of the motor vehicle changes from a high speed to a low speed, the motor-driven power steering system is smoothly stopped and enters a manual steering mode. When the speed of the motor vehicle changes from a low speed to a high speed, the motor-driven power steering system is smoothly started from the manual steering mode. The motor-driven power steering system is continuously operated when the speed of the motor vehicle fluctuates in the vicinity of the prescribed value. The motor-driven power steering system can therefore be stopped and operated smoothly and stably as the motor vehicle speed reaches the prescribed value, so that the steering feeling and stability can be improved.
摘要翻译： 在施加转向转矩的同时，当机动车辆的行驶速度增加超过规定值时，由电动机产生的辅助扭矩或由离合器传递的扭矩随着时间从预定值减小。 当施加转向扭矩时，当机动车辆的速度降低到低于规定值时，由马达产生的辅助扭矩或由离合器传递的扭矩随时间增加到预定值。 因此，当机动车辆的速度从高速变化到低速时，电动机动力转向系统平稳地停止并进入手动转向模式。 当机动车辆的速度从低速变化到高速时，电动机动力转向系统从手动转向模式平稳地起动。 当机动车辆的速度在规定值附近变动时，电动机动力转向系统连续运转。 因此，随着机动车速度达到规定值，电动动力转向系统能够平稳，稳定地停止和操作，从而可以提高转向感和稳定性。
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公开(公告)号：US4618018A
公开(公告)日：1986-10-21
申请号：US714333
申请日：1985-03-21
摘要： A power steering device for vehicles having a simple construction, which is capable of minimizing the frictional loss of a hydraulic pump as well as the power consumption of the hydraulic pump and engine. This power steering device comprises a hydraulic pump constructed such that a pressure member is provided in a pump casing and defines an inner side wall of a pump chamber on at least one axial side of a rotary shaft of the pump, the pressure members being movable in the axial direction of the shaft; that a hydraulic chamber, which is provided on a side of the pressure member opposite the pump chamber and which faces an end portion of the pressure member, communicates with a discharge port of the hydraulic pump; and that an electromagnetic change-over valve is interposed in an oil passage connecting between the hydraulic chamber and a suction port of the hydraulic pump and is adapted to place the latters in mutual communication through opening operation thereof upon receipt of a signal from a detector which detects the moment when supplementary should be reduced.
摘要翻译： 一种用于车辆的动力转向装置，其结构简单，能够最小化液压泵的摩擦损失以及液压泵和发动机的功率消耗。 该动力转向装置包括液压泵，其构造成使得压力构件设置在泵壳体中并且在泵的旋转轴的至少一个轴向侧上限定泵室的内侧壁，压力构件可在 轴的轴向; 设置在与泵室相对的压力构件的与压力构件的端部相对的一侧的液压室与液压泵的排出口连通; 并且电磁换向阀插入连接在液压室和液压泵的吸入口之间的油路中，并且适于通过其从接收到来自检测器的信号的打开操作将它们相互连通 检测补充应减少的时刻。
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