公开(公告)号：US4646867A

公开(公告)日：1987-03-03

申请号：US791106

申请日：1985-10-24

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: B62D5/22 ,  B62D7/14 ,  B62D7/15 ,  B62D5/06

CPC classification number: B62D7/1527

Abstract: A four-wheel steering system comprises a steering wheel; a steering shaft which is connected to the steering wheel to be rotated in response to operation of the steering wheel and is provided with a first pinion fixedly mounted thereon; a rack bar which is supported for sliding motion in the transverse direction of the vehicle body, is provided with a first rack gear in mesh with the first pinion and a second rack gear, and is connected to the right and left front wheels by way of tie rods, a rear wheel turning force taking-out mechanism which includes a second pinion in mesh with the second rack gear on the rack bar and a rod member connected to the second pinion, and which converts the sliding motion of the rack bar into rotation of the rod member; and a rear wheel turning mechanism which is arranged to turn the rear wheels in response to rotation of the rod member. There are provided a first resilient pressing mechanism which presses one of the first and second rack gears, from the rear, towards the pinion in mesh therewith, and a second resilient pressing mechanism which presses the pinion in mesh with the other of the first and second rack gears toward said the other of the first and second rack gears.

Abstract translation: 四轮转向系统包括方向盘; 转向轴，其连接到所述方向盘以响应于所述方向盘的操作而旋转，并且设置有固定地安装在所述方向盘上的第一小齿轮; 支撑在车身横向上的滑动运动的齿条设置有与第一小齿轮和第二齿条啮合的第一齿条，并且通过以下方式连接到左右前轮 拉杆，后轮转向力取出机构，其包括与齿条上的第二齿条啮合的第二小齿轮和连接到第二小齿轮的杆构件，并且将齿条的滑动运动转换成旋转 的杆件; 以及后轮转动机构，其被布置成响应于所述杆构件的旋转而转动所述后轮。 设置有第一弹性挤压机构，其将第一和第二齿条中的一个从后部朝向与其啮合的小齿轮按压;以及第二弹性挤压机构，其将小齿轮与第一和第二齿轮中的另一个啮合 朝向所述第一和第二齿条中的另一个的齿条齿轮。

公开(公告)号：US4610328A

公开(公告)日：1986-09-09

申请号：US696144

申请日：1985-01-29

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 ,  B62D5/10

CPC classification number: B62D7/1527

Abstract: The rear wheels of a vehicle are turned in response to the turning of the front wheels upon operation of the steering wheel. A rack member is provided to be operatively connected with a movable member of the front wheel steering system which is moved right and left in response to operation of the steering wheel so that the rack member is moved together with the movable member. The rack member is in mesh with a pinion fixed to an end of an output shaft whose rotation is transmitted to the rear wheel steering system as steering force for moving it by way of a transmission shaft.

Abstract translation: 车辆的后轮在方向盘操作时响应于前轮的转动而转动。 齿条构件设置成与前轮转向系统的可动构件可操作地连接，该可动构件响应于方向盘的操作而左右移动，使得齿条构件与可动构件一起移动。 齿条构件与固定到输出轴的端部的小齿轮啮合，该小齿轮的旋转作为用于通过传动轴移动的转向力传递到后轮转向系统。

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。

公开(公告)号：US06711965B2

公开(公告)日：2004-03-30

申请号：US10133753

申请日：2002-04-29

Applicant: Masaki Tomaru ,  Isamu Chikuma ,  Sakae Matsumoto ,  Kazuya Fukuda ,  Takahiro Saito

Inventor： Masaki Tomaru ,  Isamu Chikuma ,  Sakae Matsumoto ,  Kazuya Fukuda ,  Takahiro Saito

IPC: B62D118

CPC classification number: B62D1/181

Abstract: An electric tilt and/or telescopic steering column apparatus comprises a steering shaft having a steering wheel mounted on a rear end thereof, a steering column for rotatably supporting the steering shaft, an electric actuator for adjusting the tilt and/or telescopic position of the steering shaft by driving this steering column, and position detecting means for detecting the position of the steering shaft in a non-contact manner.

公开(公告)号：US5454438A

公开(公告)日：1995-10-03

申请号：US220545

申请日：1994-03-31

Applicant: Isamu Chikuma

Inventor： Isamu Chikuma

IPC: B62D5/04 ,  F16H57/021 ,  H02K7/08

CPC classification number: B62D5/0409 ,  F16H57/021 ,  H02K7/081 ,  F16H2057/0213

Abstract: In order to provide an electric power steering system of small size whose output shaft has little play, a pressure member of the electric-driven power steering system compresses a duplex bearing, more specifically, presses two bearing components of the duplex bearing against each other. As a result, the play which the output shaft has in each bearing is removed.

Abstract translation: 为了提供输出轴几乎没有游隙的小尺寸的电动助力转向系统，电动助力转向系统的压力构件压缩双轴承，更具体地，将双轴承轴承的两个轴承部件彼此压紧。 结果，输出轴在每个轴承中的游隙被去除。

公开(公告)号：US4724717A

公开(公告)日：1988-02-16

申请号：US902639

申请日：1986-09-02

Applicant: Isamu Chikuma

Inventor： Isamu Chikuma

IPC: B62D3/12 ,  F16H55/28 ,  F16H57/12

CPC classification number: F16H55/283 ,  B62D3/123 ,  F16H55/285 ,  Y10T74/1967

Abstract: A rack shaft support device is provided for rack and pinion steering of the type having a housing containing a pinion rotatable by the rotating operation of a steering wheel and a rack shaft engaged with the pinion and axially movable by the rotation thereof to steer wheels. The device comprises an antifriction support including an antifriction roller contacting the rack shaft, a mechanism biasing the antifriction support toward the pinion, a vibration absorbing member urged against the antifriction member and absorbing vibration of the rack shaft by friction, and a limiting member disposed concentrically about the rack shaft and limiting transverse displacement of the rack shaft to a predetermined amount.

Abstract translation: 提供了一种齿条轴支撑装置，用于具有壳体的齿条和小齿轮转向，该壳体包含通过方向盘的旋转操作可旋转的小齿轮和与小齿轮啮合的齿条轴，并通过其旋转轴向移动以转向轮。 该装置包括一个减摩支架，它包括一个与齿条轴接触的减摩辊，一个将减摩支架朝向小齿轮偏置的机构，一个抵靠摩擦件推动的吸振件，并通过摩擦吸收齿条轴的振动，同时设置一个限制件 围绕齿条轴并且将齿条轴的横向位移限制到预定量。

公开(公告)号：US4601357A

公开(公告)日：1986-07-22

申请号：US714530

申请日：1985-03-21

Applicant: Akihiko Miyoshi ,  Shigeki Furutani ,  Isamu Chikuma ,  Satoru Shimada

Inventor： Akihiko Miyoshi ,  Shigeki Furutani ,  Isamu Chikuma ,  Satoru Shimada

IPC: B62D5/26 ,  B62D6/02 ,  B62D7/14 ,  B62D7/15 ,  B62D5/00

CPC classification number: B62D7/1545

Abstract: A four-wheel steering system for a vehicle has a rear wheel steering ratio changing means which changes the rear wheel steering ratio in accordance with rear wheel steering ratio characteristics predetermined according to the vehicle speed, and an inhibiting means which inhibits the rear wheel steering ratio changing means from changing the rear wheel steering ratio when the steering wheel is turned right or left from its neutral position.

Abstract translation: 一种用于车辆的四轮转向系统具有根据根据车速预定的后轮转向比特性来改变后轮转向比的后轮转向比改变装置，以及抑制后轮转向比 当方向盘从其中立位置右转或左转时改变后轮转向比的改变方式。