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

IPC分类号： B62D1/16 ,  B62D3/08 ,  B62D5/22 ,  B62D6/02 ,  B62D9/00

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。

公开(公告)号：US5174407A

公开(公告)日：1992-12-29

申请号：US755463

申请日：1991-09-05

申请人： Yasuo Shimizu ,  Junji Yuzuriha

发明人： Yasuo Shimizu ,  Junji Yuzuriha

IPC分类号： B62D1/16 ,  B62D3/08 ,  B62D5/04 ,  B62D6/02

CPC分类号： B62D1/166

摘要： A variable ratio steering system on a motor vehicle can vary the ratio of the angle through which the steerable road wheels are steered to the angle through which the steering wheel is turned by the driver. The variable ratio steering system includes an input shaft coupled to the steering wheel, a first ball screw mechanism including a first nut threaded through balls over the input shaft, an output shaft coupled to the steerable road wheels, a second ball screw mechanism including a second nut threaded through balls over the output shaft, and a steering angle ratio adjusting mechanism, mechanically coupled to the first and second nuts, for varying the ratio of an axial displacement of the second nut to an axial displacement of the first nut. The steering angle ratio adjusting mechanism includes a swing member swingable in a direction substantially parallel to the input and output shafts about an axis lying in a plane transverse to the input and output shafts, the first and second nuts being coupled to respective different portions of the swing member. The steering angle ratio adjusting mechanism varies the distance between the axis about which the swing member is swingable and at least one of the different portions to which the first and second nuts are coupled.

摘要翻译： 机动车辆上的可变比率转向系统可以改变可转向的车轮转向的角度与驾驶员转向方向盘的角度的比率。 可变比转向系统包括联接到方向盘的输入轴，第一滚珠丝杠机构，包括螺纹穿过输入轴上的滚珠的第一螺母，联接到可转向轮的输出轴;第二滚珠丝杆机构，包括第二滚珠丝杠机构 螺母穿过输出轴上的球，以及转向角比调节机构，机械地联接到第一和第二螺母，用于改变第二螺母的轴向位移与第一螺母的轴向位移的比率。 所述转向角比调节机构包括摆动构件，所述摆动构件在与所述输入和输出轴基本平行的方向上围绕位于与所述输入和输出轴横向的平面中的轴线摆动，所述第一和第二螺母联接到所述输入和输出轴的相应不同部分 摆动构件。 转向角比调节机构改变摆动构件摆动的轴线与第一和第二螺母联接到的不同部分中的至少一个之间的距离。

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

IPC分类号： B62D1/16 ,  B62D3/12 ,  B62D5/04 ,  B62D6/02 ,  B62D9/00

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。

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

IPC分类号： G01L5/22 ,  B62D1/16 ,  B62D5/04 ,  B62D6/00 ,  B62D6/10 ,  B62D119/00

CPC分类号： B62D1/166 ,  B62D6/10

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。

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

IPC分类号： B62D5/04 ,  B62D6/00

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。

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

IPC分类号： B62D5/04 ,  B62D6/02

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。

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。

公开(公告)号：US08924080B2

公开(公告)日：2014-12-30

申请号：US14236239

申请日：2012-05-22

申请人： Yoshihiro Oniwa ,  Yasuo Shimizu ,  Atsuhiko Yoneda

发明人： Yoshihiro Oniwa ,  Yasuo Shimizu ,  Atsuhiko Yoneda

IPC分类号： B62D5/04 ,  G05D17/02

CPC分类号： B62D5/0463 ,  G05D17/02

摘要： Provided is an electric power steering device in which the operation feeling is improved without a decrease in commercial value. A phase compensation unit performs a frequency shift on a compensation frequency band compensated by the phase compensation unit. The phase compensation unit performs phase-shift in the compensation frequency band through a frequency shift process, instead of an increase in compensation gain. Therefore, it is possible to minimize occurrences of minute vibrations and abnormal noise in the steering system including the motor that accompany an increase in gain, and to improve the operation feeling and commercial value.

摘要翻译： 本发明提供一种在不降低商业价值的情况下提高操作感觉的电动助力转向装置。 相位补偿单元对由相位补偿单元补偿的补偿频带进行频移。 相位补偿单元通过频移处理来执行补偿频带中的相移，而不是补偿增益的增加。 因此，可以使伴随增益增加的包括电动机的转向系统中的微小振动和异常噪声的发生最小化，并且提高操作感和商业价值。

公开(公告)号：US20140195122A1

公开(公告)日：2014-07-10

申请号：US14236239

申请日：2012-05-22

申请人： Yoshihiro Oniwa ,  Yasuo Shimizu ,  Atsuhiko Yoneda

发明人： Yoshihiro Oniwa ,  Yasuo Shimizu ,  Atsuhiko Yoneda

IPC分类号： B62D5/04

CPC分类号： B62D5/0463 ,  G05D17/02

摘要： Provided is an electric power steering device in which the operation feeling is improved without a decrease in commercial value. A phase compensation unit performs a frequency shift on a compensation frequency band compensated by the phase compensation unit. The phase compensation unit performs phase-shift in the compensation frequency band through a frequency shift process, instead of an increase in compensation gain. Therefore, it is possible to minimize occurrences of minute vibrations and abnormal noise in the steering system including the motor that accompany an increase in gain, and to improve the operation feeling and commercial value.

摘要翻译： 本发明提供一种在不降低商业价值的情况下提高操作感觉的电动助力转向装置。 相位补偿单元对由相位补偿单元补偿的补偿频带进行频移。 相位补偿单元通过频移处理来执行补偿频带中的相移，而不是补偿增益的增加。 因此，可以使伴随增益增加的包括电动机的转向系统中的微小振动和异常噪声的发生最小化，并且提高操作感和商业价值。

公开(公告)号：US08670904B2

公开(公告)日：2014-03-11

申请号：US12937485

申请日：2009-05-28

申请人： Atsuhiko Yoneda ,  Yasuo Shimizu

发明人： Atsuhiko Yoneda ,  Yasuo Shimizu

IPC分类号： G06F17/00 ,  G06F19/00 ,  B62D6/00 ,  G08B1/06

CPC分类号： B62D5/0484 ,  B62D5/046 ,  B62D5/049 ,  H02P6/185 ,  H02P29/032

摘要： A motor control device includes: a rotation angle detection portion that detects a rotation angle of a motor and outputs a rotation angle signal; an abnormal condition detection portion that detects the presence or absence of an abnormal condition of the rotation angle detection portion; a rotation angle estimation portion that estimates the rotation angle of the motor and outputs an estimate rotation angle signal; and a driving control portion that controls driving of the motor on the basis of the rotation angle signal, which is output from the rotation angle detection portion, when the abnormal condition detection portion does not detect an abnormal condition of the rotation angle detection portion, and controls driving of the motor on the basis of the estimate rotation angle signal, which is output from the rotation angle estimation portion, when the abnormal condition detection portion detects an abnormal condition of the rotation angle detection portion.

摘要翻译： 电动机控制装置包括：旋转角度检测部，其检测电动机的旋转角度并输出旋转角度信号; 异常状态检测部，其检测所述旋转角度检测部的异常状况的有无; 旋转角度估计部，其估计所述电动机的旋转角度并输出估计旋转角度信号; 以及驱动控制部，当所述异常状态检测部未检测到所述旋转角度检测部的异常状态时，基于从所述旋转角度检测部输出的旋转角度信号来控制所述电动机的驱动，以及 当异常状态检测部检测到旋转角度检测部的异常状况时，基于从旋转角度估计部输出的估计旋转角度信号来控制电动机的驱动。