公开(公告)号：US5445237A

公开(公告)日：1995-08-29

申请号：US363337

申请日：1994-12-23

Applicant: Hiroshi Eda ,  Kenji Someya ,  Isamu Chikuma

Inventor： Hiroshi Eda ,  Kenji Someya ,  Isamu Chikuma

IPC: B62D5/04 ,  F16H55/24 ,  F16H57/023

CPC classification number: F16H55/24 ,  B62D5/0409 ,  B62D5/0421 ,  F16H57/023

Abstract: An electric power steering apparatus having a compact and inexpensive backlash mechanism is provided by arranging its structure to easily adjust the backlash of the bevel gear mechanism, and at the same time, to pre-press the bearings so that the movement of the shaft in the axial direction can be regulated. The rotational shaft having a small gear coupled thereto which constitutes a bevel gear mechanism on one side is rotatively supported by a housing, but disabled to shift in the axial direction. The large gear which constitutes the bevel gear mechanism on the other side is coupled to the output shaft of a steering system so that it can shift in the rotational direction and axial direction together with the shaft. The output shaft is rotatively supported by bearings with respect to the housing with a movable sleeve which abuts upon the outer ring of the bearing. The movable sleeve can be driven in from the outside by means of an adjustment screw so that the backlash between the small and large gears can be adjusted, while the inner ring of the bearing can be driven in with respect to the output shaft by means of a lock nut to tighten the bearing which abuts upon the outer ring of the output shaft. In this way, the inner rings of the bearings are pressed inwardly themselves, hence removing the play thereof.

Abstract translation: 具有紧凑且廉价的间隙机构的电动助力转向装置通过布置其结构以容易地调节伞齿轮机构的齿隙而提供，同时，为了预压轴承，使得轴在 可以调节轴向。 具有联结到其上的小齿轮的旋转轴在一侧构成锥齿轮机构，由壳体旋转地支撑，但不能沿轴向移动。 构成另一侧的锥齿轮机构的大齿轮联接到转向系统的输出轴，使得其可以与轴一起在旋转方向和轴向方向上移动。 输出轴相对于壳体由轴承可旋转地支撑，其具有与轴承的外圈抵接的可动套筒。 可移动套筒可以通过调节螺钉从外部驱动，从而可以调节小齿轮和大齿轮之间的间隙，同时轴承的内圈可以相对于输出轴被驱动通过 用于拧紧与输出轴的外圈抵接的轴承的锁紧螺母。 以这种方式，轴承的内圈自身被向内压，从而消除了它们的游隙。

公开(公告)号：US5048852A

公开(公告)日：1991-09-17

申请号：US433915

申请日：1989-11-09

Applicant: Isamu Chikuma ,  Satoru Shimada ,  Hiroshi Eda

Inventor： Isamu Chikuma ,  Satoru Shimada ,  Hiroshi Eda

IPC: B62D7/15

CPC classification number: B62D7/1536

Abstract: A four-wheel steering apparatus comprises a front wheel steering member for steering front wheels by being displaced according to a movement of a steering wheel, a rear wheel steering mechanism for steering rear wheels, a coupling mechanism for mechanically coupling together the front wheel steering member and an input member of the rear wheel steering mechanism, and a play mechanism provided between an end of the coupling mechanism and the front wheel steering member or the input member or in an intermediate part of the coupling mechanism, the play mechanism effecting transmission of displacement only when a displacement in excess of a predetermined amount is produced in either direction from a position corresponding to a neutral position with respect to the steering angle of the front wheels. The rear wheel s6teering mechanism includes a mechanism for steering the rear wheels according to a movement of the input member and an independent steering mechanism for steering the rear wheels independently of displacement of the front wheel steering member.

公开(公告)号：US4732231A

公开(公告)日：1988-03-22

申请号：US895227

申请日：1986-08-11

Applicant: Hirotaka Kanazawa ,  Teruhiko Takatani ,  Shigeki Furutani ,  Isamu Chikuma ,  Satoru Shimada ,  Hiroshi Eda

Inventor： Hirotaka Kanazawa ,  Teruhiko Takatani ,  Shigeki Furutani ,  Isamu Chikuma ,  Satoru Shimada ,  Hiroshi Eda

IPC: B62D5/26 ,  B62D7/14 ,  B62D7/15 ,  B62D5/06

CPC classification number: B62D7/1536

Abstract: A vehicle four wheel steering system including a rear wheel steering mechanism with a power assist device. The rear wheel steering mechanism includes a steering rod extending transversely of the vehicle and having the opposite ends connected with tie rods which are in turn connected with knuckle arms of the rear wheels. The steering rod is provided with a power cylinder in which a piston is slidably disposed. The piston is provided on the steering rod and defines hydraulic chambers in the cylinder. A control valve is provided to control hydraulic oil supply to the power cylinder. The control valve has a casing which is connected with the steering rod through an interconnecting section and hydraulic oil passages are formed in the interconnecting section for passing hydraulic oil to and from the power cylinder.

Abstract translation: 一种车辆四轮转向系统，包括具有动力辅助装置的后轮转向机构。 后轮转向机构包括横向于车辆延伸的转向杆，并且其相对端与拉杆连接，该拉杆又与后轮的转向节相连。 转向杆设置有动力缸，其中可滑动地设置有活塞。 活塞设置在转向杆上，并在气缸中限定液压室。 提供控制阀来控制动力油缸的液压油供给。 控制阀具有通过互连部分与转向杆连接的壳体，并且在互连部分中形成液压油通道，用于使液压油与动力油缸相通。

公开(公告)号：US4621702A

公开(公告)日：1986-11-11

申请号：US647431

申请日：1984-09-05

Applicant: Hirotaka Kanazawa ,  Teruhiko Takatani ,  Shigeki Furutani ,  Isamu Chikuma ,  Satoru Shimada ,  Hiroshi Eda

Inventor： Hirotaka Kanazawa ,  Teruhiko Takatani ,  Shigeki Furutani ,  Isamu Chikuma ,  Satoru Shimada ,  Hiroshi Eda

IPC: B62D7/15 ,  B62D5/06

CPC classification number: B62D7/1536

Abstract: In a four-wheel steering apparatus of a vehicle for steering also the rear wheels in conformity with the steering of the front wheels by a steering wheel, a control force for a rear wheel steering device is mechanically taken out from a front wheel steering device and is suitably controlled in the intermediate portion and is transmitted as a steering control force to the rear wheel steering device, whereby the front wheels and the rear wheels are steered in the same direction when the absolute value of the steering angle of the front wheels is less than a predetermined value, and the rear wheels are steered in the direction reverse to the front wheels when the absolute value is greater than the predetermined value. In the intermediate portion, the taken-out control force is divided into a same direction steering control force for steering the rear wheels in the same direction as the front wheels and a reverse direction steering control force for steering the rear wheels in the direction reverse to the front wheels, and the reverse direction steering control force is absorbed and only the same direction steering control force is transmitted to the rear wheel steering device when the absolute value is less than the predetermined value, and the same direction steering control force is absorbed and only the reverse direction steering control force is transmitted to the rear wheel steering device when the absolute value is greater than the predetermined value.

Abstract translation: 在用于转向的后轮与前轮的方向盘的转向相一致的车辆的四轮转向装置中，用于后轮转向装置的控制力从前轮转向装置机械地取出， 适当地控制在中间部分并作为转向控制力传递到后轮转向装置，由此当前轮的转向角的绝对值较小时，前轮和后轮被转向相同的方向 超过预定值，并且当绝对值大于预定值时，后轮在与前轮相反的方向上转向。 在中间部分中，取出的控制力被分成与前轮相同的方向转向后轮的相同方向的转向控制力和用于使后轮在与前轮相反的方向上转向的反向转向控制力 前轮和反向转向控制力被吸收，并且当绝对值小于预定值时，只有相同的方向转向控制力传递到后轮转向装置，并且相同的方向转向控制力被吸收，并且 当绝对值大于预定值时，只有反方向转向控制力传递到后轮转向装置。

公开(公告)号：US06237955B1

公开(公告)日：2001-05-29

申请号：US09400539

申请日：1999-09-21

Applicant: Kenji Sato ,  Isamu Chikuma ,  Sakae Matsumoto

Inventor： Kenji Sato ,  Isamu Chikuma ,  Sakae Matsumoto

IPC: B62D199

CPC classification number: B62D1/192 ,  B62D1/195

Abstract: A shock absorbing steering column apparatus comprise a steering column member admitting an insertion of a steering shaft, and a shock absorbing member for permitting the steering column member to displace in an axial direction while being plastically deformed by an impact load applied in the axial direction of the steering column member. The steering column member and the shock absorbing member are integrally formed of a non-ferrous metal.

Abstract translation: 一种减震转向柱装置，包括允许转向轴插入的转向柱构件和用于允许转向柱构件在轴向方向上施加的冲击载荷塑性变形的减震构件， 转向柱构件。 转向柱构件和减震构件由有色金属一体地形成。

公开(公告)号：US06237954B1

公开(公告)日：2001-05-29

申请号：US09362193

申请日：1999-07-28

Applicant: Kenji Sato ,  Isamu Chikuma ,  Sakae Matsumoto ,  Kiyoharu Higashino

Inventor： Kenji Sato ,  Isamu Chikuma ,  Sakae Matsumoto ,  Kiyoharu Higashino

IPC: B62D199

CPC classification number: B62D1/184

Abstract: An apparatus for supporting a steering column has a cross member spanned over two right-and-left walls of a car body at a portion just anterior to a driver's seat, a support bracket integrally fixedly connected to a portion, aligned with the driver's seat, of an intermediate portion of the cross member, a supported bracket fixedly connected to an intermediate portion of the steering column, and a connecting member for connecting the support bracket and the supported bracket to each other with no intermediary of other brackets.

Abstract translation: 用于支撑转向柱的装置具有跨越驾驶员座椅前方的车身的两个左右壁上的横向构件，与驱动器座椅对准的部分一体地固定连接的支撑架， 横向构件的中间部分，固定地连接到转向柱的中间部分的支撑支架，以及用于将支撑支架和支撑支架彼此连接而不用其他支架的中间部分的连接构件。

公开(公告)号：US5685390A

公开(公告)日：1997-11-11

申请号：US401894

申请日：1995-03-10

Applicant: Isamu Chikuma ,  Kenji Someya ,  Hiroshi Eda

Inventor： Isamu Chikuma ,  Kenji Someya ,  Hiroshi Eda

IPC: B62D5/04 ,  F16C33/37

CPC classification number: F16C33/3713 ,  B62D5/0448 ,  Y10T74/1872 ,  Y10T74/19781

Abstract: An electrically-operated power steering apparatus comprises a steering shaft, a rack shaft capable of linear movement for turning a steering running wheel a, rack-pinion gear for coupling the steering shaft with the rack shaft, and a ball screw mechanism including a screw groove formed on the rack shaft, a rotary ball screw nut fitted on the rack shaft, and plural balls positioned in a rolling path. The plural balls are comprised of bulbs of a larger diameter and balls of a smaller diameter, which are alternately arranged, and the smaller diameter is within a defined range.

Abstract translation: 电动动力转向装置包括转向轴，能够线性运动的转向转向轮a的齿条轴，用于将转向轴与齿条轴联接的齿条小齿轮，以及包括螺旋槽的滚珠丝杠机构 形成在齿条轴上，安装在齿条轴上的旋转滚珠丝杠螺母和位于滚动路径中的多个滚珠。 多个球由直径较大的球体和直径较小的球组成，交替排列，较小直径在规定范围内。

公开(公告)号：US5508921A

公开(公告)日：1996-04-16

申请号：US470572

申请日：1995-06-07

Applicant: Isamu Chikuma ,  Hiroshi Eda ,  Hiroyuki Kanou ,  Nobuyasu Ando ,  Kaoru Kiyono

Inventor： Isamu Chikuma ,  Hiroshi Eda ,  Hiroyuki Kanou ,  Nobuyasu Ando ,  Kaoru Kiyono

IPC: B62D7/15 ,  B60K17/34

CPC classification number: B62D7/159 ,  B62D7/1581

Abstract: A four-wheel steering apparatus comprises a front wheel steering angle sensor for detecting the steering angles given to the front wheels, a vehicle speed sensor for detecting vehicle speeds, a rear wheel output shaft for giving steering angles to the rear wheels by being displaced it in the axial direction, a centering spring having the resiliency enabling the rear wheel output shaft to be returned to the neutral position, an electric motor for causing the rear wheel output shaft to be displaced in the axial direction against the resiliency of the centering spring, and a controller for controlling the energizing of the electric motor on the basis of the signals from the front wheel steering sensor and vehicle speed sensor, the controller adjusting the output torque of the electric motor on the basis of the signals from the front wheel steering sensor and vehicle speed sensor to control the rear wheel output shaft to be displaced for a desired amount by open loop control.

Abstract translation: 四轮转向装置包括用于检测给予前轮的转向角的前轮转向角传感器，用于检测车速的车速传感器，用于通过使后轮向后轮提供转向角的后轮输出轴 在轴向方向上具有能够使后轮输出轴返回到中立位置的弹性的定心弹簧，用于使后轮输出轴在轴向上抵抗中心弹簧的弹性而位移的电动机， 以及控制器，其基于来自前轮转向传感器和车速传感器的信号来控制电动机的通电，所述控制器基于来自前轮转向传感器的信号来调节电动机的输出转矩 和车速传感器，以通过开环控制来控制后轮输出轴移动所需量。

公开(公告)号：US4730687A

公开(公告)日：1988-03-15

申请号：US813665

申请日：1985-12-26

Applicant: Isamu Chikuma ,  Hiroshi Eda

Inventor： Isamu Chikuma ,  Hiroshi Eda

IPC: B62D6/02 ,  B62D5/08

CPC classification number: B62D6/02

Abstract: A working fluid passage supplying a fixed flow rate is divided into passages so that a flow rate ratio between the two passages is varied by a variable orifice valve based on a detection signal of a physical quantity factor which varies depending on travelling and steering conditions of the vehicle. The working fluid from one of the two passages is supplied to a steering assisting force generating mechanism through a changeover valve which changes over the passages in accordance with a direction of steering torque acting on the input shaft steering the vehicle, to generate the steering assisting force. The working fluid from the other passage is supplied to a steering reaction force generating mechanism through the changeover valve, and by generating the steering reaction force to the input shaft, the steering force is controlled to an adequate condition corresponding to the physical quantity factor. Furthermore, the passage of the variable orifice valve at the side of the steering reaction force generating mechanism is connected to a drain through a changeover valve or a pressure regulating valve to thereby control the steering feeling to a more adequate condition, and at the same time, when the vehicle is travelling at a low speed, the generation of the steering reaction force by the steering reaction force generating mechanism is suppressed, or the steering reaction force of the steering reaction force generating mechanism is maintained at a constant value. Moreover, the steering angle ratio is regulated by rotating the input shaft in the same direction as the steering direction by a steering angle ratio varying mechanism in correspondence with the reaction force of the steering reaction force generating mechanism, and thus optimum steering feeling can be obtained. Further, a change in the exciting current due to an internal resistance change of an electromagnetic solenoid is suppressed by a voltage correction circuit provided in a control unit for controlling the electromagnetic solenoid of the variable orifice valve, and an appropriate steering force can be generated.

公开(公告)号：US4572316A

公开(公告)日：1986-02-25

申请号：US709723

申请日：1985-03-08

Applicant: Hirotaka Kanazawa ,  Takatani Teruhiko ,  Furutani Shigeki ,  Isamu Chikuma ,  Satoru Shimada ,  Hiroshi Eda

Inventor： Hirotaka Kanazawa ,  Takatani Teruhiko ,  Furutani Shigeki ,  Isamu Chikuma ,  Satoru Shimada ,  Hiroshi Eda

IPC: B62D7/15 ,  B62D5/06

CPC classification number: B62D7/1536

Abstract: A four-wheel steering system for a vehicle comprising a steering mechanism including a steering wheel, a front wheel turning mechanism operatively connected to the steering mechanism to turn the front wheels according to the turning angle of the steering wheel, a rear wheel turning mechanism operatively connected to the steering mechanism to turn the rear wheels in response to operation of the steering wheel, and a rear wheel steering ratio changing mechanism for changing the ratio of the turning angle of the rear wheels to the turning angle of the steering wheel.

Abstract translation: 一种用于车辆的四轮转向系统，其包括转向机构，该转向机构包括方向盘，前轮转向机构，其可操作地连接到所述转向机构，以根据所述方向盘的转动角转动所述前轮， 连接到转向机构以响应于方向盘的操作来转动后轮;以及后轮转向比改变机构，用于改变后轮的转向角度与方向盘的转向角度的比率。