JPS61171672A - Rear-wheel steering actuator in front-rear-wheel steering gear for vehicle - Google Patents

Rear-wheel steering actuator in front-rear-wheel steering gear for vehicle

Info

Publication number
JPS61171672A
JPS61171672A JP1183485A JP1183485A JPS61171672A JP S61171672 A JPS61171672 A JP S61171672A JP 1183485 A JP1183485 A JP 1183485A JP 1183485 A JP1183485 A JP 1183485A JP S61171672 A JPS61171672 A JP S61171672A
Authority
JP
Japan
Prior art keywords
wheel steering
rear wheel
rear wheels
vehicle
motor
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP1183485A
Other languages
Japanese (ja)
Other versions
JPH0551507B2 (en
Inventor
Yoshimichi Kawamoto
善通 川本
Osamu Furukawa
修 古川
Tetsuo Hamada
哲郎 浜田
Mitsuya Serizawa
芹沢　満也
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Honda Motor Co Ltd
Original Assignee
Honda Motor Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Honda Motor Co Ltd filed Critical Honda Motor Co Ltd
Priority to JP1183485A priority Critical patent/JPS61171672A/en
Priority to FR868600944A priority patent/FR2576272B1/en
Priority to AU52650/86A priority patent/AU587220B2/en
Priority to DE19863602140 priority patent/DE3602140A1/en
Priority to CA000500373A priority patent/CA1266442A/en
Priority to US06/822,008 priority patent/US4703945A/en
Priority to GB08601699A priority patent/GB2170455B/en
Publication of JPS61171672A publication Critical patent/JPS61171672A/en
Publication of JPH0551507B2 publication Critical patent/JPH0551507B2/ja
Granted legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D7/00—Steering linkage; Stub axles or their mountings
    • B62D7/06—Steering linkage; Stub axles or their mountings for individually-pivoted wheels, e.g. on king-pins
    • B62D7/14—Steering linkage; Stub axles or their mountings for individually-pivoted wheels, e.g. on king-pins the pivotal axes being situated in more than one plane transverse to the longitudinal centre line of the vehicle, e.g. all-wheel steering
    • B62D7/15—Steering linkage; Stub axles or their mountings for individually-pivoted wheels, e.g. on king-pins the pivotal axes being situated in more than one plane transverse to the longitudinal centre line of the vehicle, e.g. all-wheel steering characterised by means varying the ratio between the steering angles of the steered wheels
    • B62D7/1518—Steering linkage; Stub axles or their mountings for individually-pivoted wheels, e.g. on king-pins the pivotal axes being situated in more than one plane transverse to the longitudinal centre line of the vehicle, e.g. all-wheel steering characterised by means varying the ratio between the steering angles of the steered wheels comprising a mechanical interconnecting system between the steering control means of the different axles
    • B62D7/1545—Steering linkage; Stub axles or their mountings for individually-pivoted wheels, e.g. on king-pins the pivotal axes being situated in more than one plane transverse to the longitudinal centre line of the vehicle, e.g. all-wheel steering characterised by means varying the ratio between the steering angles of the steered wheels comprising a mechanical interconnecting system between the steering control means of the different axles provided with electrical assistance

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Steering-Linkage Mechanisms And Four-Wheel Steering (AREA)

Abstract

PURPOSE:To make stable running for a car performable all the time, by installing a manual steering means capable of restoring rear wheels to a neutral position even in the case where a rear-wheel steering actuator stops its normal function. CONSTITUTION:A motor 1 of a rear-wheel steering actuator is driven and controlled for its rotation by a car-mounted computer 9, whereby rear wheels 8 are steered via a tie rod 6. When the motor fails to operate and these rear wheels come to a stop in a state of steered in a certain sense, a handle 20 is engaged with a hexagonal wrench key part 2a of the screw srock 2 tightly attached to an output shaft of the motor 1 and if the screw stock 2 is turned round in the required sense, these rear wheels 8 are restored to a neutral position and locked thereat.

Description

【発明の詳細な説明】 〈産業上の利用分野〉 本発明は前輪に対する後輪の転舵角を可変制御し得る車
輌の前後輪操舵装置に於ける後輪転舵用アクチュエータ
に関する。DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a rear wheel steering actuator in a vehicle front and rear wheel steering system capable of variably controlling the steering angle of the rear wheels relative to the front wheels.

〈従来の技術〉 本出願人は既に前輪の転舵に関連せしめて後輪を転舵す
ると共に、車速に応じて前輪に対する後輪の舵角または
舵角比を可変とする車輌の操舵装ＷＩ（特願昭５７−１
３４８８８号等）を種々提案している。このような装置
にあっては、低速に於ては後輪を前輪と逆位相または略
零に転舵させ、他方高速に於てはこれとは反対に後輪を
前輪と同位相に転舵させるようにしている。また所望に
応じて後輪の舵角比の車速に対する関数特性を車輌の加
速度に応じてまたは手動により変更したり、或いはマニ
ュアル選択により固定モードを選択し得るようにするこ
ともできる。<Prior Art> The present applicant has already developed a vehicle steering system WI that steers the rear wheels in conjunction with the steering of the front wheels and also changes the steering angle or steering angle ratio of the rear wheels relative to the front wheels in accordance with the vehicle speed. (Special application 1987-1
34888, etc.). In such a device, at low speeds, the rear wheels are steered in the opposite phase to the front wheels or almost to zero, while at high speeds, on the other hand, the rear wheels are steered in the same phase as the front wheels. I try to let them do it. Furthermore, if desired, the functional characteristic of the steering angle ratio of the rear wheels relative to the vehicle speed can be changed in accordance with the acceleration of the vehicle or manually, or a fixed mode can be selected by manual selection.

これにより低速に於ては車輌の最小回転半径、内輪差共
に大幅に減少し、車庫入れ、狭い屈曲路での走行及びＵ
ターンなどに於て車輌の取り廻し性を飛躍的に向上させ
ることができると共に、他方高速に於ては車線変更など
に於ける操縦応答性を飛躍的に向上させることができる
。As a result, at low speeds, both the minimum turning radius and the difference between the inner wheels of the vehicle are significantly reduced, making it easier to park the vehicle, drive on narrow curved roads, and
It is possible to dramatically improve the maneuverability of the vehicle when making turns, and on the other hand, it is also possible to dramatically improve maneuverability when changing lanes at high speeds.

一般に、前輪操舵装置にあっては、路面から前輪に加わ
る力が成る程度ハンドルに伝達されるようにし、前輪に
設けられたキャスタ角により前輪を直進位置に復元させ
ようとする力を得て車輌の運転を容易にしている。しか
しながら後輪についてはそのような作用が必要でないば
かりか、路面の凹凸などの外乱により後輪が転舵された
場合に、車輌の運動が乱されるという不都合を生じ得る
ため、後輪に加わる外力がアクチュエータの入力端に伝
達されないようにすると良い。その場合アクチュエータ
が何等かの理由によりその機能を停止した場合には、後
輪が転舵された状態で固定され車輌の運転が困難になる
場合が考えられる。In general, a front wheel steering system is designed so that the force applied to the front wheels from the road surface is transmitted to the steering wheel to a certain extent, and the caster angle provided on the front wheels obtains the force that restores the front wheels to the straight-ahead position. makes driving easier. However, such an action is not necessary for the rear wheels, and if the rear wheels are steered due to disturbances such as unevenness on the road surface, the movement of the vehicle may be disrupted. It is preferable to prevent external force from being transmitted to the input end of the actuator. In this case, if the actuator stops functioning for some reason, the rear wheels may become fixed in a steered state, making it difficult to drive the vehicle.

〈発明が解決しようとする問題点〉 このような従来技術の欠点に鑑み、本発明の主な目的は
、後輪転舵用のアクチュエータがなんらかの理由により
その機能を停止した場合でも手動により後輪を中立位置
に復元し得るようにしておくことにより、常に車輌の安
定な走行を可能にする前後輪操舵装置に於ける後輪転舵
用アクチュエータを提供することにある。<Problems to be Solved by the Invention> In view of these shortcomings of the prior art, the main object of the present invention is to manually steer the rear wheels even if the actuator for steering the rear wheels stops functioning for some reason. An object of the present invention is to provide a rear wheel steering actuator in a front and rear wheel steering device that enables stable running of a vehicle at all times by restoring to a neutral position.

く問題点を解決するための手段〉 このような目的は、本発明によれば、後輪の転舵角を一
定の条件に従って可変制御する車輌の前後輪操舵装置に
於ける後輪転舵用アクチュエータであって、該アクチュ
エータが機能を停止した場合でも後輪を中立位置に復元
し得るべく手動転舵手段が具備されていることを特徴と
する後輪転舵用アクチュエータを提供することにより達
成される。Means for Solving the Problems According to the present invention, an actuator for rear wheel steering in a front and rear wheel steering device of a vehicle that variably controls the steering angle of the rear wheels according to certain conditions is provided. This is achieved by providing an actuator for steering a rear wheel, characterized in that it is equipped with a manual steering means so as to be able to restore the rear wheels to a neutral position even if the actuator stops functioning. .

く作用〉 このように後輪に手動転舵手段を付設しておくことによ
り、後輪を転舵した状態で後輪転舵用アクチュエータが
停止した場合でも、手動により後輪を中立位置に復元す
ることができる。By attaching the manual steering means to the rear wheels in this way, even if the rear wheel steering actuator stops while the rear wheels are being steered, the rear wheels can be manually restored to the neutral position. be able to.

〈実施例〉 第１図は本発明に基づく後輪転舶用アクチュエータの第
一の実施例を示している。車輌の後部の中心位置の近傍
の車体部分に電動モータ１が固定されており、該モータ
の出力軸にはねじ棒２が固１２″″１°゛″′″″ＵＩ
２Ｇ；ｔ、　２５４ｇ５（７）ａ１３　　　イに切設さ
れた内ねじと螺合している。スライダ５は左右方向にス
ライドし得るように車体に支持されていると共に玉継手
６ａを介してタイロッド６の一端に接続されている。該
タイロッド６の他端は同じく玉継手６ｂを介して後輪８
のナックルアーム７に連結されている。ねじ棒２の道端
には六角棒部分１２ａが一体的に形成されている。<Embodiment> FIG. 1 shows a first embodiment of a rear rotary marine actuator based on the present invention. An electric motor 1 is fixed to a part of the vehicle body near the center position at the rear of the vehicle, and a threaded rod 2 is fixed to the output shaft of the motor.
2G;t, 254g5(7)a13 It is screwed into the internal thread cut in A. The slider 5 is supported by the vehicle body so as to be slidable in the left-right direction, and is connected to one end of the tie rod 6 via a ball joint 6a. The other end of the tie rod 6 is also connected to the rear wheel 8 via a ball joint 6b.
It is connected to the knuckle arm 7 of. A hexagonal bar portion 12a is integrally formed at the end of the threaded rod 2.

ここでねじ棒２のねじのリード角をｒ！ｌＩ！！角より
小さく定めてあり、ねじ棒２の回転によりスライダ５を
駆動して、後輪８を転舵することができるが、後輪８に
加えられた外力によってねじ棒２が駆動されることがな
い。Here, the lead angle of the screw of threaded rod 2 is r! lI! ! The rotation of the threaded rod 2 drives the slider 5 to steer the rear wheel 8, but the threaded rod 2 cannot be driven by an external force applied to the rear wheel 8. do not have.

モータ１は車載コンピュータ９に接続されており、所定
の制御ブＯグラムに基づき所定の後輪舵角を実現するべ
くモータ１が駆動されるようになっている。モータ１が
回動駆動されると、ねじ機構を介してスライダ５が左右
に変位し、タイロッド６を介して後輪８を転舵させるこ
とができる。The motor 1 is connected to an on-vehicle computer 9, and is driven to achieve a predetermined rear wheel steering angle based on a predetermined control program. When the motor 1 is rotationally driven, the slider 5 is displaced from side to side via the screw mechanism, and the rear wheels 8 can be steered via the tie rod 6.

何等かの理由にモータ１の作動が不可能になり後輪８が
成る向きに転舵された状態で停止した場合には、車輌の
運転が困難になるため、第２図に詳しく示したように、
ハンドル２０を前記六角棒部分２ａに係合させ、ねじ棒
２を所要の向きに回動させ後輪８を中立位置に復元固定
することができる。この六角棒部分２ａに代えて他の係
合手段を用いることもできることは言うまでもない。ま
たハンドル２０は車載されたジヤツキなどに兼用しうる
ちのであって良い。If for some reason the motor 1 becomes inoperable and the vehicle stops with the rear wheels 8 being steered, it will be difficult to drive the vehicle, as shown in detail in Figure 2. To,
By engaging the handle 20 with the hexagonal rod portion 2a and rotating the threaded rod 2 in a desired direction, the rear wheel 8 can be restored and fixed to the neutral position. It goes without saying that other engagement means may be used in place of the hexagonal bar portion 2a. Further, the handle 20 may be a type that can also be used as a jack mounted on the vehicle.

第３図は本発明に基づく後輪転舵用アクチュエータの第
二の実施例を示している。モータ１１の出力軸にはウオ
ームギヤ１２が装着されており、ラックアンドピニオン
ギヤ装置１５のビニオン軸１４に装着されたウオームホ
イール１３と歯合している。ラックアンドピニオンギヤ
装置１５のラック軸の両端はそれぞれ玉継手１６ａを介
してタイロッド１６の一端に連結され、該タイロッドの
他端は同じく玉継手１６ｂを介して後輪１８のナックル
アーム１７に連結されている。FIG. 3 shows a second embodiment of the rear wheel steering actuator according to the present invention. A worm gear 12 is attached to the output shaft of the motor 11, and meshes with a worm wheel 13 attached to a binion shaft 14 of a rack and pinion gear device 15. Both ends of the rack shaft of the rack and pinion gear device 15 are each connected to one end of a tie rod 16 via a ball joint 16a, and the other end of the tie rod is also connected to a knuckle arm 17 of the rear wheel 18 via a ball joint 16b. There is.

モータ１１は車載コンピュータ１９に接続されており、
所定の制御プログラムに基づぎ所要の後輪舵角を実現す
るべくモータ１１が回動駆動されることとなる。モータ
１１が回動駆動されると、ラツ、クアンドビニオン機構
及びタイロッド１６を介して後輪１８を転舵させること
ができる。The motor 11 is connected to an on-vehicle computer 19,
The motor 11 is rotationally driven to achieve a required rear wheel steering angle based on a predetermined control program. When the motor 11 is rotationally driven, the rear wheels 18 can be steered via the ratchet, quad and pinion mechanism, and tie rod 16.

本実施例に於ても後輪１８に加えられた外力によりモー
タ１１が駆動され後輪１８が転舵される事態を回避する
ために、ウオームギヤ１２の進み角がその摩擦角よりも
小ざく定められている。また、モータ）１が何等かの理
由により停止して、後輪１８がいずれかの向きに転舵さ
れた状態で固定された場合に、後輪１８を中立位置に手
動により復元し得るべくモータ１１の出力軸の一端に六
角棒部分１２ａが設けられている。前記と同様に別途格
納されたハンドル２０を六角棒部分１２ａに係合させモ
ータ１１の出力軸を手動により回動させ、後輪１８を中
立位置に復元することができる。In this embodiment as well, in order to avoid a situation where the motor 11 is driven by an external force applied to the rear wheel 18 and the rear wheel 18 is steered, the lead angle of the worm gear 12 is set smaller than its friction angle. It is being In addition, when the motor 1 stops for some reason and the rear wheel 18 is fixed in a state where it is steered in either direction, the motor is configured so that the rear wheel 18 can be manually restored to the neutral position. A hexagonal bar portion 12a is provided at one end of the output shaft of 11. Similarly to the above, the separately stored handle 20 is engaged with the hexagonal bar portion 12a to manually rotate the output shaft of the motor 11, thereby restoring the rear wheel 18 to the neutral position.

〈効果〉 このように本発明によれば、後輪転舵用アクチュエータ
が故障等によりその機能を停止した場合でも手動により
後輪を中立位置に復元することにより、従来形式の前輪
のみを転舵し得る車輌と同様にし得るため、前後輪操舵
装置の信頼性を向上させるという効果を奏することがで
きる。<Effect> As described above, according to the present invention, even if the rear wheel steering actuator stops its function due to a failure etc., by manually restoring the rear wheels to the neutral position, only the front wheels can be steered compared to the conventional type. Since it can be made in the same manner as the vehicle obtained, it is possible to achieve the effect of improving the reliability of the front and rear wheel steering devices.

【図面の簡単な説明】[Brief explanation of drawings]

第１図は本発明に基づく後輪転舵用アクチュエータが応
用された後輪転舵機構を単純化して示す斜視図である。 第２図は第１図の一部を拡大して示す斜視図である。 第３図は本発明に基づく後輪転舶用アクチュエータの第
二の実施例が応用された後輪転舵機構の全体を単純化し
て示す斜視図である。 １・・・モータ　　　　　２・・・ねじ棒２ａ・・・六
角棒部分　　３・・・凸部５・・・スライダ　　　　６
・・・タイロッド６ａ、６ｂ・・・玉継手　７・・・ナ
ックルアーム８・・・後輪　　　　　　９・・・コンピ
ュータ１１・・・モータ　　　　１２・・・ウオームギ
ヤ１２　ａ−°°六角棒部分　１３°°°ウオームホイ
ール　　　　　１１４・・・ビニオン軸 １５・・・ラックアンドピニオンギヤ装置１６・・・タ
イロッド　　１７・・・ナックルアーム１８・・・後輪
　　　　　１９・・・コンピュータ２０・・・ハンドル 特　許　出　願　人　　本田技研工業株式会社代　　　
　　理　　　　　人　　　弁理士　　大　　島　　陽　
　−第２図FIG. 1 is a simplified perspective view showing a rear wheel steering mechanism to which a rear wheel steering actuator according to the present invention is applied. FIG. 2 is an enlarged perspective view of a part of FIG. 1. FIG. 3 is a simplified perspective view showing the entire rear wheel steering mechanism to which the second embodiment of the rear wheel steering actuator according to the present invention is applied. 1...Motor 2...Threaded rod 2a...Hexagonal bar part 3...Protrusion 5...Slider 6
...Tie rod 6a, 6b...Ball joint 7...Knuckle arm 8...Rear wheel 9...Computer 11...Motor 12...Worm gear 12 a-°°Hexagonal rod part 13°° ° Worm wheel 114... Binion shaft 15... Rack and pinion gear device 16... Tie rod 17... Knuckle arm 18... Rear wheel 19... Computer 20... Handle Patent application Person Honda Giken Kogyo Co., Ltd.
Attorney Patent Attorney Yo Oshima
-Figure 2

Claims (1)

【特許請求の範囲】 後輪の転舵角を一定の条件に従つて可変制御する車輌の
前後輪操舵装置に於ける後輪転舵用アクチュエータであ
って、 該アクチュエータが機能を停止した場合でも後輪を中立
位置に復元し得るべく手動転舵手段が具備されているこ
とを特徴とする後輪転舵用アクチュエータ。[Scope of Claims] A rear wheel steering actuator in a vehicle front and rear wheel steering device that variably controls the rear wheel steering angle according to certain conditions, the actuator for rear wheel steering in a front and rear wheel steering system of a vehicle, which controls the steering angle of the rear wheels variably according to certain conditions; An actuator for steering a rear wheel, characterized in that it is equipped with manual steering means for restoring the wheels to a neutral position.
JP1183485A 1985-01-24 1985-01-24 Rear-wheel steering actuator in front-rear-wheel steering gear for vehicle Granted JPS61171672A (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
JP1183485A JPS61171672A (en) 1985-01-24 1985-01-24 Rear-wheel steering actuator in front-rear-wheel steering gear for vehicle
FR868600944A FR2576272B1 (en) 1985-01-24 1986-01-23 ACTUATOR FOR STEERING THE REAR WHEELS IN A FRONT AND REAR WHEEL STEERING DEVICE OF A VEHICLE
AU52650/86A AU587220B2 (en) 1985-01-24 1986-01-23 Actuator for steering the rear wheels in front and rear wheel steering device for vehicle
DE19863602140 DE3602140A1 (en) 1985-01-24 1986-01-24 DRIVE FOR AN ALL-WHEEL STEERING DEVICE
CA000500373A CA1266442A (en) 1985-01-24 1986-01-24 Actuator for steering the rear wheels in front and rear wheel steering device for vehicle
US06/822,008 US4703945A (en) 1985-01-24 1986-01-24 Actuator for steering the rear wheels in front and rear wheel steering device for vehicle
GB08601699A GB2170455B (en) 1985-01-24 1986-01-24 Actuator for steering the rear wheels in front and rear wheel steering device for vehicles

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1183485A JPS61171672A (en) 1985-01-24 1985-01-24 Rear-wheel steering actuator in front-rear-wheel steering gear for vehicle

Publications (2)

Publication Number Publication Date
JPS61171672A true JPS61171672A (en) 1986-08-02
JPH0551507B2 JPH0551507B2 (en) 1993-08-02

Family

ID=11788774

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1183485A Granted JPS61171672A (en) 1985-01-24 1985-01-24 Rear-wheel steering actuator in front-rear-wheel steering gear for vehicle

Country Status (1)

Country Link
JP (1) JPS61171672A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5083626A (en) * 1986-10-20 1992-01-28 Honda Giken Kogyo Kabushiki Kaishi Rear wheel steering device for vehicle with four steerable wheels
JP2009280075A (en) * 2008-05-22 2009-12-03 Toyota Motor Corp Wheel steering device and neutral position returning method of steering actuator

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110901753A (en) * 2019-12-16 2020-03-24 北京理工大学 Rear wheel linear control steering gear with middle position self-locking function and control method thereof

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5969070U (en) * 1982-10-30 1984-05-10 マツダ株式会社 4-wheel steering system for vehicles

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5969070U (en) * 1982-10-30 1984-05-10 マツダ株式会社 4-wheel steering system for vehicles

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5083626A (en) * 1986-10-20 1992-01-28 Honda Giken Kogyo Kabushiki Kaishi Rear wheel steering device for vehicle with four steerable wheels
JP2009280075A (en) * 2008-05-22 2009-12-03 Toyota Motor Corp Wheel steering device and neutral position returning method of steering actuator

Also Published As

Publication number Publication date
JPH0551507B2 (en) 1993-08-02

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