JPH01195181A - Rear wheel steering device - Google Patents
Rear wheel steering deviceInfo
- Publication number
- JPH01195181A JPH01195181A JP63015999A JP1599988A JPH01195181A JP H01195181 A JPH01195181 A JP H01195181A JP 63015999 A JP63015999 A JP 63015999A JP 1599988 A JP1599988 A JP 1599988A JP H01195181 A JPH01195181 A JP H01195181A
- Authority
- JP
- Japan
- Prior art keywords
- axle
- telescopic mechanism
- rear wheel
- fluid pressure
- wheel steering
- 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
Links
- 239000012530 fluid Substances 0.000 claims description 17
- 230000008602 contraction Effects 0.000 claims description 4
- 238000005265 energy consumption Methods 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000013585 weight reducing agent Substances 0.000 description 1
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
- B62D7/146—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 comprising means for steering by acting on the suspension system, e.g. on the mountings of the suspension arms
Abstract
Description
【発明の詳細な説明】
〈産業上の利用分野〉
本発明は、前輪操舵車の後輪操舵装置に関するものであ
る。DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a rear wheel steering device for a front wheel steered vehicle.
〈従来の技術〉
トラック等の大型車両においても、コーナリングの操舵
安定性や小回りをきかせるために後輪を操舵可能とした
ものがある。<Prior Art> Some large vehicles such as trucks have rear wheels that can be steered to improve steering stability during cornering and to make tight turns.
従来用いられている後輪操舵装置は第２図で示すように
、左右一対の後輪１を取付けた後輪車軸２（以下単に車
軸という）の左右、方向中心点３を車体に対し旋回可能
に枢支し、前記車軸２の左右両端部と車体４との間に油
圧シリンダ５と、この油圧シリンダ５により車両前後方
向に進退移動するピストンロッド６とを配置し、前輪操
舵に応じて前記左右何れか一方の油圧シリンダ５に圧油
を給排して車軸２を所要角度旋回し、後輪１に舵角を与
える構造である。As shown in Fig. 2, the conventionally used rear wheel steering device is capable of turning with respect to the vehicle body about the left and right directional center point 3 of a rear wheel axle 2 (hereinafter simply referred to as axle) to which a pair of left and right rear wheels 1 are attached. A hydraulic cylinder 5 and a piston rod 6 are disposed between both left and right ends of the axle 2 and the vehicle body 4, and a piston rod 6 is moved forward and backward in the vehicle longitudinal direction by the hydraulic cylinder 5. This structure supplies and discharges pressure oil to either the left or right hydraulic cylinder 5 to turn the axle 2 at a required angle and give the rear wheel 1 a steering angle.
〈発明が解決しようとする課題〉
上記従来装置にあっては、車軸２を旋回動させるには油
圧シリンダ５の直動推力であるため、大型車両の重量大
なる車軸２の旋回に対応する大きな出力の油圧シリンダ
と油圧力を必要とし、大型の油圧シリンダ並びに高出力
の油圧ポンプを用いなければならない、その結果、コス
トアップ、重量増加は勿論のこと、高出力の油圧ポンプ
を作動するエンジン出力の消費エネルギーも大である等
の問題点があった。<Problems to be Solved by the Invention> In the above-mentioned conventional device, since the turning movement of the axle 2 requires the direct thrust of the hydraulic cylinder 5, a large amount of force is required to accommodate the turning of the heavy axle 2 of a large vehicle. A large hydraulic cylinder and a high-output hydraulic pump must be used, which results in an increase in cost and weight, as well as an increase in engine output to operate the high-output hydraulic pump. There were problems such as high energy consumption.
本発明は、小さな流体圧シリンダの出力で車軸を旋回可
能とし、流体圧機器の小型、軽量化、エンジン出力の省
エネルギー化を図った後輪操舵装置を提供することを目
的とするものである。SUMMARY OF THE INVENTION An object of the present invention is to provide a rear wheel steering device that enables an axle to turn using the output of a small fluid pressure cylinder, and achieves a smaller and lighter fluid pressure device and an energy saving engine output.
く課題を解決するための手段〉
上記目的を達成するために、本発明の後輪操舵装置にお
いては、後輪車軸の左右方向中心点を車体に対し旋回可
能に枢支し、前記後輪車軸左右の両端部と車体との間に
流体圧シリンダによって車両の前後方向に変形伸縮する
伸縮機構を設け、前記流体圧シリンダに給排する流体圧
を前輪操舵に応じて制御する流体圧制御装置を備えたも
のである。Means for Solving the Problems> In order to achieve the above object, in the rear wheel steering device of the present invention, the center point of the rear wheel axle in the left-right direction is pivotally supported relative to the vehicle body, and the rear wheel axle A fluid pressure control device is provided between the left and right ends and the vehicle body, which is provided with an expansion and contraction mechanism that deforms and expands and contracts in the longitudinal direction of the vehicle by a fluid pressure cylinder, and controls fluid pressure supplied to and discharged from the fluid pressure cylinder in accordance with front wheel steering. It is prepared.
〈作 用〉
上記の構成により、流体圧シリンダに流体圧が供給され
ると、この流体圧シリンダのピストンロッドの推力によ
り伸縮機構を伸張変形し、この変形伸張力によって車軸
を旋回作動する。<Operation> With the above configuration, when fluid pressure is supplied to the fluid pressure cylinder, the extension and contraction mechanism is extended and deformed by the thrust of the piston rod of this fluid pressure cylinder, and the axle is rotated by this deformation and extension force.
〈実施例〉
以下本発明の自実施例を図面に基づいて説明する。第１
図において、１は左右一対の後輪、２は後輪車軸（以下
車軸という）である、この車軸２は左右方向中心点３を
車体に対し旋回可能に枢支されている。<Embodiments> Hereinafter, embodiments of the present invention will be described based on the drawings. 1st
In the figure, reference numeral 1 indicates a pair of left and right rear wheels, and reference numeral 2 indicates a rear wheel axle (hereinafter referred to as axle). This axle 2 is pivotally supported around a left-right center point 3 relative to the vehicle body.
本発明は、前記車軸２の左右両端部と車体４との間に、
油圧シリンダ８によって車両の前後方向に変形伸縮する
伸縮機構７を設ける。この伸縮機′Ｍ４７は、例えば、
パンタグラフ構造あるいは２枚の弯曲板バネを互いに円
弧面を外向きにして合わせた構造等である。In the present invention, between the left and right ends of the axle 2 and the vehicle body 4,
A telescopic mechanism 7 is provided which is deformed and contracted in the longitudinal direction of the vehicle by means of a hydraulic cylinder 8. This telescoping machine 'M47 is, for example,
It has a pantograph structure or a structure in which two curved leaf springs are aligned with each other with their arcuate surfaces facing outward.
前記油圧シリンダ８は、スプリング８ａが内設され、油
圧シリンダ内に圧油が供給されないときにはスプリング
８ａの力によって伸縮機構７は最大伸張状態に保持され
、車軸２の軸線は車両の前後方向軸線と直交する直進状
態となっている。The hydraulic cylinder 8 has a spring 8a installed therein, and when no pressure oil is supplied to the hydraulic cylinder, the telescopic mechanism 7 is held at its maximum extension by the force of the spring 8a, and the axis of the axle 2 is aligned with the longitudinal axis of the vehicle. They are running in a straight line that intersects at right angles.
油圧シリンダ８への圧油の給排制御装置は、油圧ポンプ
９と、この油圧ポンプ９と油圧シリンダ８とを継ぐ配管
路に設置した切換弁１０とによって構成され、切換弁１
０の切換信号１１は、図略の前輪操舵装置からのパイロ
ット圧によるものである。A control device for supplying and discharging pressure oil to the hydraulic cylinder 8 is composed of a hydraulic pump 9 and a switching valve 10 installed in a piping path connecting the hydraulic pump 9 and the hydraulic cylinder 8.
The switching signal 11 of 0 is based on pilot pressure from a front wheel steering device (not shown).
前輪操舵に応じて前記切換弁１０が切換えられ、油圧ポ
ンプ９からの圧油が油圧シリンダ８に供給されると、圧
油が供給された側の一方の油圧シリンダ８は伸縮機構７
を縮小変形し、他方の油圧シリンダ８は油槽と連通され
、スプリング８ａの力によって伸縮機構７は伸張状態を
保持する。これにより車軸２は車体に枢支している中
４心点３を旋回中心として伸縮機構７が縮小変形した側
を車両前方へ旋回し、車軸２に前輪と同位相の舵角が付
与されるのである。尚上記実施例は油圧を用いた場合で
あるが、空気圧に置き換えることも可能である。また切
換信号１１は前輪操舵のパイロット油圧の他に車速セン
サからの信号をマイクロコンピュータで処理し前輪操舵
と車速に応じて切換えを行うようにすることも可能であ
る。When the switching valve 10 is switched in response to front wheel steering and pressure oil from the hydraulic pump 9 is supplied to the hydraulic cylinders 8, one of the hydraulic cylinders 8 on the side to which the pressure oil was supplied is connected to the telescopic mechanism 7.
The other hydraulic cylinder 8 is communicated with the oil tank, and the telescopic mechanism 7 is maintained in an extended state by the force of the spring 8a. As a result, axle 2 is pivotally supported on the vehicle body.
The telescopic mechanism 7 turns the contracted and deformed side toward the front of the vehicle with the four center points 3 as the turning center, and the axle 2 is given a steering angle that is in the same phase as the front wheels. Although the above embodiment uses hydraulic pressure, it is also possible to use pneumatic pressure instead. Further, the switching signal 11 can be made by processing a signal from a vehicle speed sensor in addition to the pilot oil pressure for front wheel steering using a microcomputer, and switching can be performed in accordance with the front wheel steering and the vehicle speed.
〈発明の効果〉
以上の用に本発明によると、流体圧シリンダの出力を変
形伸縮する伸縮機構を介して後輪車軸を旋回動させて操
舵する構成であるから、流体圧シリンダの出力は変形伸
縮機構によって増力伝達し、従って、流体圧シリンダは
小型のもので充分な操舵力が得られる。また、流体圧源
も高出力のものは不要であり、流体圧源を作動するエン
ジン出力の消費エネルギーを低減することができ、軽量
化、コストダウンが得られる。<Effects of the Invention> According to the present invention, the rear wheel axle is rotated and steered through the expansion and contraction mechanism that deforms and expands the output of the fluid pressure cylinder, so the output of the fluid pressure cylinder does not change. Increased force is transmitted by the telescoping mechanism, and therefore sufficient steering force can be obtained even with a small hydraulic cylinder. Further, a high-output fluid pressure source is not required, and the energy consumption of the engine output for operating the fluid pressure source can be reduced, resulting in weight reduction and cost reduction.
第１図は本発明の構造図、第２図は従来装置の構造図で
ある。
１・・・後輪、２・・・後輪車軸、３・・・中心点、４
・・・車体、７・・・伸縮機構、８・・・油圧シリンダ
、９・・・油圧ポンプ、１０・・・切換弁。
特許出願人 日野自動車工業株式会社代 理 人
平 井 部図面FIG. 1 is a structural diagram of the present invention, and FIG. 2 is a structural diagram of a conventional device. 1... Rear wheel, 2... Rear wheel axle, 3... Center point, 4
... Vehicle body, 7 ... Telescopic mechanism, 8 ... Hydraulic cylinder, 9 ... Hydraulic pump, 10 ... Switching valve. Patent applicant Hino Motors Co., Ltd. Representative Hiraibe Drawing
Claims (1)
支し、前記後輪車軸左右の両端部と車体との間に流体圧
シリンダによって車両の前後方向に変形伸縮する伸縮機
構を設け、前記流体圧シリンダに給排する流体圧を前輪
操舵に応じて制御する流体圧制御装置を備えたことを特
徴とする後輪操舵装置。The center point of the rear wheel axle in the left and right direction is pivotally supported relative to the vehicle body, and an expansion and contraction mechanism is provided between both left and right ends of the rear wheel axle and the vehicle body to deform and expand and contract in the front and rear direction of the vehicle by a fluid pressure cylinder, A rear wheel steering device comprising a fluid pressure control device that controls fluid pressure supplied to and discharged from the fluid pressure cylinder in accordance with front wheel steering.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63015999A JPH0764273B2 (en) | 1988-01-28 | 1988-01-28 | Rear wheel steering system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63015999A JPH0764273B2 (en) | 1988-01-28 | 1988-01-28 | Rear wheel steering system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01195181A true JPH01195181A (en) | 1989-08-07 |
| JPH0764273B2 JPH0764273B2 (en) | 1995-07-12 |
Family
ID=11904333
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63015999A Expired - Lifetime JPH0764273B2 (en) | 1988-01-28 | 1988-01-28 | Rear wheel steering system |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0764273B2 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH051660U (en) * | 1991-06-26 | 1993-01-14 | カヤバ工業株式会社 | Vehicle rear axle steering system |
| JPH08188448A (en) * | 1995-08-25 | 1996-07-23 | Matsushita Electric Ind Co Ltd | Production of antifouling glass |
| EP0905007A1 (en) * | 1997-04-08 | 1999-03-31 | Hino Jidosha Kogyo Kabushiki Kaisha | Front and rear wheel steering system for automobiles |
| JP2009539695A (en) * | 2006-06-14 | 2009-11-19 | ルノー・エス・アー・エス | Device for setting the direction of the rear wheel |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6129183U (en) * | 1984-07-25 | 1986-02-21 | 大野ベロ−工業株式会社 | Compact high-thrust actuator for valves |
| JPS61155456U (en) * | 1985-03-20 | 1986-09-26 |
-
1988
- 1988-01-28 JP JP63015999A patent/JPH0764273B2/en not_active Expired - Lifetime
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6129183U (en) * | 1984-07-25 | 1986-02-21 | 大野ベロ−工業株式会社 | Compact high-thrust actuator for valves |
| JPS61155456U (en) * | 1985-03-20 | 1986-09-26 |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH051660U (en) * | 1991-06-26 | 1993-01-14 | カヤバ工業株式会社 | Vehicle rear axle steering system |
| JPH08188448A (en) * | 1995-08-25 | 1996-07-23 | Matsushita Electric Ind Co Ltd | Production of antifouling glass |
| JP2577203B2 (en) * | 1995-08-25 | 1997-01-29 | 松下電器産業株式会社 | Method for producing antifouling glass |
| EP0905007A1 (en) * | 1997-04-08 | 1999-03-31 | Hino Jidosha Kogyo Kabushiki Kaisha | Front and rear wheel steering system for automobiles |
| EP0905007A4 (en) * | 1997-04-08 | 2003-03-19 | Hino Motors Ltd | Front and rear wheel steering system for automobiles |
| JP2009539695A (en) * | 2006-06-14 | 2009-11-19 | ルノー・エス・アー・エス | Device for setting the direction of the rear wheel |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0764273B2 (en) | 1995-07-12 |
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