JPH0722323Y2 - Fluid pressure suspension system for connected vehicles - Google Patents
Fluid pressure suspension system for connected vehiclesInfo
- Publication number
- JPH0722323Y2 JPH0722323Y2 JP4071189U JP4071189U JPH0722323Y2 JP H0722323 Y2 JPH0722323 Y2 JP H0722323Y2 JP 4071189 U JP4071189 U JP 4071189U JP 4071189 U JP4071189 U JP 4071189U JP H0722323 Y2 JPH0722323 Y2 JP H0722323Y2
- Authority
- JP
- Japan
- Prior art keywords
- fluid pressure
- vehicle
- leveling
- valve
- towed vehicle
- 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.)
- Expired - Lifetime
Links
Description
【考案の詳細な説明】 （産業上の利用分野） この考案は連結車両の流体圧サスペンション装置の改良
に関する。DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to improvement of a fluid pressure suspension device for an articulated vehicle.
（従来の技術） トラクタトレーラなど連結車両において、被牽引車両の
サスペンションスプリングとして流体圧ばね（特開昭48
-104217号公報参照）を採用したものが知られている。(Prior Art) In a connected vehicle such as a tractor trailer, a fluid pressure spring is used as a suspension spring of a towed vehicle (Japanese Patent Laid-Open No.
(See Japanese Patent Publication No. 104217) is known.
第６図において、トレーラ１の車軸２両端にはサスペン
ションアーム３が取り付けられ、アーム３の一端はフレ
ーム４に、車軸２が上下方向へ回動自由に連結される。
５は車軸２両端を懸架する流体圧ばねで、サスペンショ
ンアーム３の他端側でフレーム４との間に介装される。In FIG. 6, suspension arms 3 are attached to both ends of an axle 2 of a trailer 1, and one end of the arm 3 is connected to a frame 4 so that the axle 2 can freely rotate in the vertical direction.
A fluid pressure spring 5 suspends both ends of the axle 2 and is interposed between the other end of the suspension arm 3 and the frame 4.
各流体圧ばね５の配管途中にはそれぞれ車高変化に応じ
てばね５内の流体圧（例えばエア圧）を給排するレベリ
ングバルブ６が配設される。レベリングバルブ６は流体
圧ばね５側のポート７及び低圧側と高圧側のポート８と
９を備えるボデイ10と、ボデイ10内を軸方向へ摺動する
スプール11とからなり、スプール11は中立位置で３つの
ポート７〜９を遮断すると共に、左右いずれか一方へ移
動するとポート７を８または９に連通させる。スプール
11はＬ字状のレバー12及び駆動ロッド13を介してサスペ
ンションアーム３に連結され、サスペンションアーム３
の動きに伴って軸方向へ摺動する。A leveling valve 6 that supplies and discharges a fluid pressure (for example, air pressure) in the spring 5 in accordance with a change in vehicle height is disposed in the middle of the piping of each fluid pressure spring 5. The leveling valve 6 comprises a body 10 having a port 7 on the fluid pressure spring 5 side and ports 8 and 9 on the low pressure side and the high pressure side, and a spool 11 that slides in the body 10 in the axial direction. The three ports 7 to 9 are blocked by and the port 7 is communicated with 8 or 9 when moved to the left or right. spool
11 is connected to the suspension arm 3 via an L-shaped lever 12 and a drive rod 13,
Slides in the axial direction with the movement of.
例えば車両の旋回時、左右流体圧ばね５は内輪側で伸長
して外輪側で圧縮されるが、このとき左右のレベリング
バルブ６がそれぞれ作動して、圧側の流体圧ばね５に流
体圧を供給し、伸側の流体圧ばね５内の流体圧を排出す
るため、左右の流体圧ばね５の間で車体の傾きと逆方向
の偶力（横揺れ反力）が発生し、車体のローリングを抑
制する。For example, when the vehicle turns, the left and right fluid pressure springs 5 expand on the inner wheel side and are compressed on the outer wheel side, but at this time, the left and right leveling valves 6 respectively operate to supply fluid pressure to the fluid pressure springs 5 on the pressure side. However, since the fluid pressure in the extension side fluid pressure springs 5 is discharged, a couple force (rolling reaction force) in a direction opposite to the inclination of the vehicle body is generated between the left and right fluid pressure springs 5 to prevent rolling of the vehicle body. Suppress.
（考案が解決しようとする課題） しかしながらこの場合、レベリングバルブ６は車体のロ
ーリングに即応して作動するものの、左右の流体圧ばね
５間で偶力を発生するまでに流体圧の給排に時間がかか
る、つまり応答遅れを生じるため、例えば旋回車速を落
とさないと、とりわけ急ハンドルでの過渡的旋回時に車
体のローリング角が過大となるという問題があった。(Problems to be solved by the invention) However, in this case, although the leveling valve 6 operates immediately in response to the rolling of the vehicle body, it takes time to supply and discharge the fluid pressure until a couple force is generated between the left and right fluid pressure springs 5. Therefore, there is a problem in that the rolling angle of the vehicle body becomes excessively large especially during a transitional turning with a steerable steering wheel, unless the turning vehicle speed is reduced, because a response delay occurs.
なお、連結車両ではないが、旋回時などでの車体の傾き
をいち早く抑制するため、車両のステアリング操作に応
動する油圧発生手段と、この供給油圧によりレベリング
バルブを駆動するアクチュエータを設けたものが提案さ
れている（実開昭63-77227号）が、牽引車両と被牽引車
両の切り離し可能な連結車両には油圧配管上の難しさも
あって適用しがたい。Although not a connected vehicle, it is proposed to provide hydraulic pressure generation means that responds to the steering operation of the vehicle and an actuator that drives the leveling valve by this supplied hydraulic pressure in order to quickly suppress the tilt of the vehicle body when turning. However, it is difficult to apply it to a connected vehicle that can separate the towed vehicle and the towed vehicle due to the difficulty in hydraulic piping.
（課題を解決するための手段） この考案はこのような問題点を解決するため、牽引車両
に連結器を介して連結される被牽引車両の車軸左右を独
立的に懸架する流体圧ばねと、これらばね内の流体圧を
それぞれ車高に応じて給排するレベリングバルブを備え
る連結車両の流体圧サスペンション装置において、各レ
ベリングバルブの駆動ロッドに軸方向へ摺動するピスト
ン両側に流体圧室を持つダンパシリンダを設ける一方、
牽引車両と被牽引車両との連結器での関節点を中心とす
る交角に応じてストロークする連結角検出手段と、この
検出手段に連動して左右のダンパシリンダ内両側の流体
圧を選択的に給排するコントロール弁を設ける。(Means for Solving the Problem) In order to solve such a problem, the present invention provides a fluid pressure spring that independently suspends the left and right axles of a towed vehicle that is connected to the towed vehicle via a coupler. In a fluid pressure suspension device of a connected vehicle including leveling valves for supplying and discharging the fluid pressure in each spring according to a vehicle height, fluid pressure chambers are provided on both sides of a piston that axially slides on a drive rod of each leveling valve. While installing a damper cylinder,
Connection angle detection means that makes a stroke according to the intersection angle around the joint point in the coupler between the towing vehicle and the towed vehicle, and the fluid pressure on both sides inside the left and right damper cylinders is selectively linked to this detection means. Provide a control valve to supply and discharge.
（作用） 例えば車両の旋回時には、牽引車両と被牽引車両との間
で折れ曲がり角（交角）を生じると、連結角検出手段が
これに応じてストロークし、コントロール弁を介して左
右のダンパシリンダ内両側の流体圧を給排する。これに
より、左右のレベリングバルブがそれぞれダンパシリン
ダで駆動され、外輪側の流体圧ばねに流体圧を供給し、
内輪側の流体圧ばね内の流体圧を排出する。したがっ
て、左右の流体圧ばねの間で車体の旋回外側を押し上
げ、内側を低下させようとする偶力が発生するため、牽
引車両に追従して旋回する被牽引車両のローリング角を
効果的に抑制することができる。(Operation) For example, when the vehicle is turning, if a bending angle (intersection angle) is generated between the towed vehicle and the towed vehicle, the connecting angle detecting means makes a stroke accordingly, and the left and right damper cylinders are moved through the control valve. Supply and discharge fluid pressure on both sides. As a result, the left and right leveling valves are driven by the damper cylinders respectively, and the fluid pressure is supplied to the fluid pressure spring on the outer ring side.
The fluid pressure in the fluid pressure spring on the inner ring side is discharged. Therefore, a couple force is generated between the left and right fluid pressure springs to push up the turning outer side of the vehicle body and lower the inner side, so that the rolling angle of the towed vehicle turning following the towing vehicle is effectively suppressed. can do.
（実施例） 第１図〜第４図はセミトレーラ式連結車両に適用した実
施例を示し、トレーラ20の車軸21は両端で、従前と同じ
くサスペンションアーム22を介して流体圧ばね23により
懸架される。各流体圧ばね23の配管途中にはそれぞれ車
高変化に応じてばね23内の流体圧（例えばエア圧）を給
排するレベリングバルブ24（従前と同一構成）が配設さ
れる。(Embodiment) FIGS. 1 to 4 show an embodiment applied to a semi-trailer type connecting vehicle, in which an axle 21 of a trailer 20 is suspended at both ends by a fluid pressure spring 23 via suspension arms 22 as before. . A leveling valve 24 (having the same configuration as before) that supplies and discharges a fluid pressure (for example, air pressure) in the spring 23 in accordance with a vehicle height change is disposed in the middle of the piping of each fluid pressure spring 23.
左右のレベリングバルブ24の各駆動ロッド25には軸方向
に摺動するピストン26両側（上下）に流体圧室27、28を
持つダンパシリンダ29が介装される。ダンパシリンダ29
は上下の流体圧室27と28が同圧のとき、シリンダ30内に
収装したスプリング31とＬ字状のレバー32先端のおもり
33とのバランスにより中立位置に保持され、流体圧室2
7、28のいずれか一方に後述するコントロール弁40から
流体圧が供給されると、他方の流体圧室28または27内の
流体圧を排出しながらピストン26が摺動、つまり駆動ロ
ッド32を伸縮させる。なお、ピストン26には上下の流体
圧室27と28を連通するオリフィス34が形成される。Each drive rod 25 of the left and right leveling valves 24 is provided with a damper cylinder 29 having fluid pressure chambers 27 and 28 on both sides (up and down) of a piston 26 that slides in the axial direction. Damper cylinder 29
When the upper and lower fluid pressure chambers 27 and 28 have the same pressure, a spring 31 housed in the cylinder 30 and a weight at the tip of the L-shaped lever 32.
It is held in the neutral position due to the balance with 33, and the fluid pressure chamber 2
When a fluid pressure is supplied to either one of 7 and 28 from a control valve 40 described later, the piston 26 slides while discharging the fluid pressure in the other fluid pressure chamber 28 or 27, that is, the drive rod 32 expands and contracts. Let The piston 26 is formed with an orifice 34 which connects the upper and lower fluid pressure chambers 27 and 28.
一方、トラクタ50側の第５輪カプラ51はトレーラ20の載
置面を構成するサドル52と、サドル52をバランスピン5
3、54を介して支持するブラケット55などからなり、サ
ドル52にはトレーラ20の連結ピン56のピン穴57への係合
を案内するガイド溝58が形成される。トレーラ20には連
結ピン56を中心とする円弧上に付設したレール59にロー
ラ60を介して移動自在に係合子61が取り付けられ、係合
子61はトラクタ50との連結時に第５輪カプラ51のガイド
溝58と係合し、連結ピン56を中心とするサドル52の回動
に伴ってレール59上を移動する。係合子61の片側にはア
ーム62が突設され、アーム62先端はロッド63を介してコ
ントロール弁40の駆動ロッド41に連結される。On the other hand, the fifth wheel coupler 51 on the side of the tractor 50 has a saddle 52 that constitutes the mounting surface of the trailer 20 and a balance pin 5 that connects the saddle 52.
A guide groove 58 is formed in the saddle 52 for guiding engagement of the connecting pin 56 of the trailer 20 with the pin hole 57 of the trailer 20. The trailer 20 is provided with an engaging member 61 movably via a roller 60 on a rail 59 attached on an arc centered on the connecting pin 56, and the engaging member 61 of the fifth wheel coupler 51 is connected to the tractor 50 when the engaging member 61 is connected. It engages with the guide groove 58 and moves on the rail 59 as the saddle 52 rotates about the connecting pin 56. An arm 62 is projectingly provided on one side of the engaging element 61, and a tip of the arm 62 is connected to a drive rod 41 of the control valve 40 via a rod 63.
コントロール弁40はシリンダ42内を軸方向に摺動するピ
ストン43両側（前後）の流体圧室44と45に作動流体（オ
イル）を補充するリザーバタンク46を備え、ピストン43
の摺動に伴って縮小する流体圧室44または45の流体圧を
ポート44Aまたは45Aを介して押し出すと共に、拡大する
流体圧室45または44にポート45Aまたは44Aを介して流体
圧を吸い込む。係合子61と連結する駆動ロッド41側の流
体圧室44は圧側のダンパシリンダ29Aの下部流体圧室28
と右側のダンパシリンダ29Bの上部流体圧室27に、反対
側の流体圧室45は左側のダンパシリンダ29Aの上部流体
圧室27と右側のダンパシリンダ29Bの下部流体圧室28に
それぞれ配管接続される。The control valve 40 is provided with a reservoir tank 46 that replenishes the working fluid (oil) to the fluid pressure chambers 44 and 45 on both sides (front and rear) of the piston 43 that slides in the cylinder 42 in the axial direction.
The fluid pressure in the fluid pressure chamber 44 or 45 that shrinks with the sliding is pushed out through the port 44A or 45A, and the fluid pressure is sucked into the fluid pressure chamber 45 or 44 that expands through the port 45A or 44A. The fluid pressure chamber 44 on the side of the drive rod 41 connected to the engaging element 61 is the lower fluid pressure chamber 28 of the damper cylinder 29A on the pressure side.
And the upper fluid pressure chamber 27 of the damper cylinder 29B on the right side, and the fluid pressure chamber 45 on the opposite side is connected to the upper fluid pressure chamber 27 of the damper cylinder 29A on the left side and the lower fluid pressure chamber 28 of the damper cylinder 29B on the right side, respectively. It
このような構成により、車両の旋回時には例えば第５図
で示すようにトラクタ50を左側に操舵すると、第５輪カ
プラ51のサドル52を介して係合子61がレール59上を右側
に移動し、ロッド63を介してコントロール弁40の駆動ロ
ッド41を図中左側（引出方向）へ変位させる。これによ
り、コントロール弁40内のピストン43が流体圧室44の流
体圧を押し出して、左側のダンパシリンダ29Aの下部流
体圧室28と右側のダンパシリンダ29Aの上部流体圧室27
に供給すると、左側のダンパシリンダ29A内のピストン2
6が上部流体圧室27内の流体圧をコントロール弁40の流
体圧室45へと排出しながら上方へ摺動すると共に、右側
のダンパシリンダ29B内のピストン26が下部流体圧室28
内の流体圧を同じく排出しながら下方へ摺動する。With such a configuration, when the tractor 50 is steered to the left as shown in FIG. 5 when the vehicle turns, the engaging element 61 moves to the right on the rail 59 via the saddle 52 of the fifth wheel coupler 51, The drive rod 41 of the control valve 40 is displaced to the left side (drawing direction) in the figure via the rod 63. As a result, the piston 43 in the control valve 40 pushes out the fluid pressure in the fluid pressure chamber 44, so that the lower fluid pressure chamber 28 of the left damper cylinder 29A and the upper fluid pressure chamber 27 of the right damper cylinder 29A.
Supply to the piston 2 in the damper cylinder 29A on the left side.
6 slides upward while discharging the fluid pressure in the upper fluid pressure chamber 27 to the fluid pressure chamber 45 of the control valve 40, and the piston 26 in the damper cylinder 29B on the right side moves to the lower fluid pressure chamber 28.
It also slides downward while discharging the fluid pressure inside.
このため、右側のレベリングバルブ24のスプール39が駆
動ロッド25の伸長によりＬ字状のレバー32を介して図中
左側に摺動し、旋回外側の流体圧ばね23内に流体圧を供
給する一方、左側のレベリングバルブ24のスプール39が
駆動ロッド25の収縮により同じく図中右側に摺動し、旋
回内側の流体圧ばね23内の流体圧を排出する。Therefore, the spool 39 of the right leveling valve 24 slides to the left side in the drawing through the L-shaped lever 32 due to the extension of the drive rod 25, and supplies the fluid pressure into the fluid pressure spring 23 on the outside of the turning. The spool 39 of the left leveling valve 24 also slides to the right side in the drawing due to the contraction of the drive rod 25, and the fluid pressure in the fluid pressure spring 23 on the inside of the rotation is discharged.
したがって、左右の流体圧ばね23の間で車体を内側に傾
斜させようとする偶力が発生するため、トラクタ50に追
従して旋回するトレーラ20のローリング角を効果的に抑
制することができる。Therefore, a couple of forces tending to incline the vehicle body inward is generated between the left and right fluid pressure springs 23, so that the rolling angle of the trailer 20 turning following the tractor 50 can be effectively suppressed.
なお、旋回途中（車体が傾斜した状態）で停車した場合
には、ダンパシリンダ29内のピストン26のオリフィス34
により上下の流体圧室27と28が同圧となるため、レベリ
ングバルブ24のそれぞれが、左右の流体圧ばね23を対し
て車体を水平状態に戻すように流体圧を給排する。If the vehicle stops while turning (the body is tilted), the orifice 34 of the piston 26 in the damper cylinder 29
As a result, the upper and lower fluid pressure chambers 27 and 28 have the same pressure, so that each of the leveling valves 24 supplies and discharges the fluid pressure to the left and right fluid pressure springs 23 so as to return the vehicle body to a horizontal state.
（考案の効果） 以上要するにこの考案によれば、牽引車両に連結器を介
して連結される被牽引車両の車軸左右を独立的に懸架す
る流体圧ばねと、これらばね内の流体圧をそれぞれ車高
に応じて給排するレベリングバルブを備える連結車両の
流体圧サスペンション装置において、各レベリングバル
ブの駆動ロッドに軸方向へ摺動するピストン両側に流体
圧室を持つダンパシリンダを設ける一方、牽引車両と被
牽引車両との連結器での関節点を中心とする交角に応じ
てストロークする連結角検出手段と、この検出手段に連
動して左右のダンパシリンダ内両側の流体圧を選択的に
給排するコントロール弁を設けたので、旋回時などでの
被牽引車両のローリング角を効果的に抑制することがで
き、さらにコントロール弁の給排量を増加すれば、旋回
時での車体の内傾化も可能という効果が得られる。(Effects of the Invention) In short, according to the present invention, the fluid pressure springs independently suspended on the left and right axles of the towed vehicle that are connected to the towed vehicle via the coupler, and the fluid pressures inside these springs are respectively applied to the vehicle. In a fluid pressure suspension device for a connected vehicle equipped with a leveling valve for supplying / discharging according to height, a damper cylinder having fluid pressure chambers on both sides of a piston that slides in the axial direction is provided on a drive rod of each leveling valve, Connection angle detecting means for making a stroke according to an intersection angle around a joint point in a coupler with a towed vehicle, and fluid pressure on both sides inside the left and right damper cylinders is selectively supplied and discharged in conjunction with this detecting means. Since the control valve is provided, the rolling angle of the towed vehicle during turning can be effectively suppressed, and if the control valve supply / discharge amount is increased, The effect that the car body can be tilted inward is also obtained.
第１図はこの考案の実施例を示すトレーラの要部側面
図、第２図は同じくトラクタとトレーラの連結状態を示
す一部切欠側面図、第３図はその平面図、第４図は同じ
くコントロール弁の配管図、第５図は同じく作動状態説
明図、第６図は従来技術を示すトレーラの要部側面図で
ある。 20……トレーラ、21……車軸、23……流体圧ばね、24…
…レベリングバルブ、25……駆動ロッド、29……ダンパ
シリンダ、40……コントロール弁、50……トラクタ、51
……第５輪カプラ、61……係合子。FIG. 1 is a side view of a main portion of a trailer showing an embodiment of the present invention, FIG. 2 is a partially cutaway side view showing a connected state of a tractor and a trailer, FIG. 3 is its plan view, and FIG. 4 is the same. 5 is a piping diagram of the control valve, FIG. 5 is an explanatory view of the operating state of the same, and FIG. 6 is a side view of the main part of the trailer showing the prior art. 20 …… Trailer, 21 …… Axle, 23 …… Fluid pressure spring, 24…
… Leveling valve, 25 …… Drive rod, 29 …… Damper cylinder, 40 …… Control valve, 50 …… Tractor, 51
...... 5th wheel coupler, 61 ...... engager.
Claims (1)
引車両の車軸左右を独立的に懸架する流体圧ばねと、こ
れらばね内の流体圧をそれぞれ車高に応じて給排するレ
ベリングバルブを備える連結車両の流体圧サスペンショ
ン装置において、各レベリングバルブの駆動ロッドに軸
方向へ摺動するピストン両側に流体圧室を持つダンパシ
リンダを設ける一方、牽引車両と被牽引車両との連結器
での関節点を中心とする交角に応じてストロークする連
結角検出手段と、この検出手段に連動して左右のダンパ
シリンダ内両側の流体圧を選択的に給排するコントロー
ル弁を設けたことを特徴とする連結車両の流体圧サスペ
ンション装置。1. A fluid pressure spring for independently suspending left and right axles of a towed vehicle connected to a towing vehicle via a coupler, and leveling for supplying and discharging fluid pressures in the springs according to vehicle heights. In a fluid pressure suspension device for a coupled vehicle equipped with a valve, a damper cylinder having fluid pressure chambers on both sides of a piston that slides in the axial direction is provided on a drive rod of each leveling valve, while a coupler for a towed vehicle and a towed vehicle is provided. A connecting angle detecting means for making a stroke according to an intersection angle centered on the joint point and a control valve for selectively supplying / discharging fluid pressure on both sides inside the left and right damper cylinders are provided in association with the detecting means. And a fluid pressure suspension device for a connected vehicle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4071189U JPH0722323Y2 (en) | 1989-04-06 | 1989-04-06 | Fluid pressure suspension system for connected vehicles |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4071189U JPH0722323Y2 (en) | 1989-04-06 | 1989-04-06 | Fluid pressure suspension system for connected vehicles |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02130805U JPH02130805U (en) | 1990-10-30 |
| JPH0722323Y2 true JPH0722323Y2 (en) | 1995-05-24 |
Family
ID=31550735
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4071189U Expired - Lifetime JPH0722323Y2 (en) | 1989-04-06 | 1989-04-06 | Fluid pressure suspension system for connected vehicles |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0722323Y2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5312059B2 (en) * | 2009-01-20 | 2013-10-09 | 日野自動車株式会社 | Connection vehicle, connection pressure control method and program in connection vehicle |
-
1989
- 1989-04-06 JP JP4071189U patent/JPH0722323Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH02130805U (en) | 1990-10-30 |
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