JPH06278438A - Suspension device of working vehicle - Google Patents
Suspension device of working vehicleInfo
- Publication number
- JPH06278438A JPH06278438A JP9135493A JP9135493A JPH06278438A JP H06278438 A JPH06278438 A JP H06278438A JP 9135493 A JP9135493 A JP 9135493A JP 9135493 A JP9135493 A JP 9135493A JP H06278438 A JPH06278438 A JP H06278438A
- Authority
- JP
- Japan
- Prior art keywords
- work vehicle
- hydraulic cylinder
- hydraulic cylinders
- pressure
- axle
- 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
Landscapes
- Vehicle Body Suspensions (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、タイヤ付車輪で移動す
る作業車両に用いられる作業車両の懸架装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a suspension system for a work vehicle used in a work vehicle that moves by wheels with tires.
【０００２】[0002]
【従来の技術】タイヤ付車輪で移動する作業車両、例え
ばホイールショベルやホイールローダは、車輪を駆動す
るアクスルと車体とが直接固定されているか、又はピン
ジョイントで結合されている。このような作業車両の一
例を図により説明する。図５は作業車両の主要部の概略
構成の正面図、図６はその側面図である。各図で、１は
作業車両、２は車体、３は車体２に取り付けられるアク
スル、４はアクスル３により駆動される左右の車輪を示
す。前方のアクスル３は車体２と一点でピンジョイント
５により結合され、後方のアクスル３は車体２と直接結
合されている。2. Description of the Related Art In a work vehicle that moves by wheels with tires, for example, a wheel shovel or a wheel loader, an axle for driving the wheels and a vehicle body are directly fixed to each other or are connected by a pin joint. An example of such a work vehicle will be described with reference to the drawings. FIG. 5 is a front view of a schematic configuration of a main part of the work vehicle, and FIG. 6 is a side view thereof. In each drawing, 1 is a work vehicle, 2 is a vehicle body, 3 is an axle mounted on the vehicle body 2, and 4 is left and right wheels driven by the axle 3. The front axle 3 is connected to the vehicle body 2 at one point by a pin joint 5, and the rear axle 3 is directly connected to the vehicle body 2.
【０００３】前方のアクスル３をピンジョイント５を介
して車体２と結合することにより、４つの車輪の接地性
を高め、かつ、後方のアクスル３を車体２と直接結合す
ることにより、作業車両の曲折走行時における車体２の
ローリング剛性を保持することができる。By connecting the front axle 3 to the vehicle body 2 via the pin joints 5, the grounding properties of the four wheels are enhanced, and by connecting the rear axle 3 directly to the vehicle body 2, It is possible to maintain the rolling rigidity of the vehicle body 2 at the time of bend running.
【０００４】[0004]
【発明が解決しようとする課題】一般に、上記従来の作
業車両１における車輪４は、作業現場において移動する
ためのものであり、仮に道路を移動する場合であっても
低速で移動することを前提としていた。しかし、近年、
作業車両１を一般道路で走行移動させることが多くな
り、このため、低速では他の車両の走行を阻害すること
となり、道路渋滞の原因となっていた。Generally, the wheels 4 in the conventional work vehicle 1 are for moving at a work site, and are assumed to move at low speed even when moving on a road. I was trying. However, in recent years
Work vehicle 1 often travels on a general road, which hinders the travel of other vehicles at low speeds, causing road congestion.
【０００５】このため、作業車両１に高速走行性能を持
たせ、一般道路を高速走行させる手段が用いられていた
が、アクスル３と車体２との結合が上記の構造を有する
作業車両１を高速走行させると、路面の凹凸による車輪
４の上下動が直接車体２へ伝わり、オペレータの乗り心
地が極度に悪化し、さらに、車輪４のタイヤの弾性の影
響により車体２の共振振動を発生して車体２全体がバウ
ンスして路面との接地が悪くなり、これらのことから、
作業車両１の操縦の安定性に悪影響を及ぼすという問題
があった。For this reason, the work vehicle 1 is provided with a high-speed traveling performance so that the work vehicle 1 travels at a high speed on an ordinary road. However, the work vehicle 1 having the above-mentioned structure is connected to the axle 3 at a high speed. When the vehicle is run, the vertical movement of the wheels 4 due to the unevenness of the road surface is directly transmitted to the vehicle body 2, the ride comfort of the operator is extremely deteriorated, and further, the resonance vibration of the vehicle body 2 is generated due to the elasticity of the tires of the wheels 4. The whole body 2 bounces and the ground contact with the road surface becomes poor. From these things,
There is a problem that the stability of the operation of the work vehicle 1 is adversely affected.
【０００６】このような問題を排除するため、車体２と
アクスル３との間に通常の車両と同様に適宜のサスペン
ションを介在させる手段も考えられるが、サスペンショ
ンの介在は作業車両１の作業性能を悪化させるのは明ら
かであり、サスペンションを採用することはできない。In order to eliminate such a problem, it is conceivable to interpose an appropriate suspension between the vehicle body 2 and the axle 3 as in the case of a normal vehicle. However, the suspension intervenes the work performance of the work vehicle 1. Obviously, it's going to make it worse and you can't use suspension.
【０００７】本発明の目的は、上記従来技術における課
題を解決し、作業性能に影響を及ぼすことなく走行時の
振動を吸収、減衰することができる作業車両の懸架装置
を提供することにある。An object of the present invention is to solve the above problems in the prior art and to provide a suspension system for a work vehicle capable of absorbing and damping vibrations during traveling without affecting work performance.
【０００８】[0008]
【課題を解決するための手段】上記の目的を達成するた
め、本発明は、作業機構を備えた車体と、この車体の前
後に取り付けられたアクスルと、タイヤが取り付けられ
前記各アクスルにより駆動される左右の車輪とで構成さ
れる作業車両において、前記アクスルのうちの少なくと
も一方のアクスルの左右と前記車体との間に結合された
各油圧シリンダと、これら油圧シリンダの油室を連結す
る配管と、この配管に連結された蓄圧器と、この蓄圧器
と前記各油圧シリンダとの間に少なくとも１つ配置され
た絞りとを設けたことを特徴とする。In order to achieve the above object, the present invention provides a vehicle body equipped with a working mechanism, an axle mounted on the front and rear of the vehicle body, and a tire mounted and driven by each of the axles. In a work vehicle composed of left and right wheels, the hydraulic cylinders connected between the left and right of at least one of the axles and the vehicle body, and piping connecting the oil chambers of these hydraulic cylinders. A pressure accumulator connected to the pipe, and at least one throttle arranged between the pressure accumulator and each of the hydraulic cylinders are provided.
【０００９】[0009]
【作用】作業車両走行時、各油圧シリンダは路面の凹凸
に応じて伸縮し、その都度蓄圧器との間で圧油の出し入
れが行われ、これにより車体の振動が吸収される。又、
当該圧油の出し入れは絞りを介して行われるが、この絞
りは圧油の移動を制限し、結局、周期の短い振動に対し
て、これを減衰させるように機能する。When the work vehicle is running, each hydraulic cylinder expands and contracts according to the unevenness of the road surface, and the pressure oil is taken in and out of the pressure accumulator each time, whereby the vibration of the vehicle body is absorbed. or,
The pressure oil is taken in and out through a throttle, which restricts the movement of the pressure oil and eventually functions to damp vibrations of short cycle.
【００１０】[0010]
【実施例】以下、本発明を図示の実施例に基づいて説明
する。図１は本発明の実施例に係る作業車両の懸架装置
の概略構成を示す正面図である。この図で、図５に示す
部分と同一又は等価な部分には同一符号が付してある。
１０は本実施例の懸架装置を取り付けた作業車両を示
す。１１は作業車両１０の前方のアクスル３の左右にお
いて、車体２と当該アクスル３との間に装着された油圧
シリンダであり、それらの各ピストン１１ｐはアクスル
３と連結されている。１２は左右の油圧シリンダ１１の
各油室を連通する配管、１３は各油圧シリンダ１１の出
口側において配管１２に設けられた絞りを示す。１４は
配管１２と連通する蓄圧器であり、各絞り１３の間に設
けられている。これら油圧シリンダ１１、配管１２、絞
り１３、および蓄圧器１４により本実施例の懸架装置が
構成される。なお、図示されていないが、作業車両１０
の後方のアクスル３と車体２との間にも同じ懸架装置が
取り付けられている。The present invention will be described below with reference to the illustrated embodiments. FIG. 1 is a front view showing a schematic configuration of a suspension device for a work vehicle according to an embodiment of the present invention. In this figure, the same or equivalent parts as those shown in FIG. 5 are designated by the same reference numerals.
Reference numeral 10 denotes a work vehicle to which the suspension device of this embodiment is attached. Reference numeral 11 denotes hydraulic cylinders mounted between the vehicle body 2 and the axle 3 on the left and right of the axle 3 in front of the work vehicle 10, and their respective pistons 11p are connected to the axle 3. Reference numeral 12 denotes a pipe that connects the oil chambers of the left and right hydraulic cylinders 11 to each other, and 13 denotes a throttle provided on the pipe 12 at the outlet side of each hydraulic cylinder 11. A pressure accumulator 14 communicates with the pipe 12 and is provided between the throttles 13. The hydraulic cylinder 11, the pipe 12, the throttle 13, and the pressure accumulator 14 constitute a suspension device of this embodiment. Although not shown, the work vehicle 10
The same suspension device is also mounted between the axle 3 and the vehicle body 2 behind the vehicle.
【００１１】車体２が静止した状態では、各油圧シリン
ダ１１および蓄圧器１４は連通しているので、それらの
圧力は同一である。次に、作業車両１０が走行すると、
路面の凹凸により車輪４が上下動し、これに応じてアク
スル３を介して各油圧シリンダ１１のピストン１１ｐが
伸縮し、ピストン１１ｐが伸びた方の油圧シリンダ１１
の圧力は減少し、縮んだ方の油圧シリンダ１１の圧力は
増加する。When the vehicle body 2 is stationary, the hydraulic cylinders 11 and the pressure accumulator 14 are in communication with each other, so that their pressures are the same. Next, when the work vehicle 10 travels,
The wheels 4 move up and down due to the unevenness of the road surface, and accordingly, the pistons 11p of the hydraulic cylinders 11 expand and contract via the axles 3, and the hydraulic cylinders 11 having the extended pistons 11p.
Pressure decreases, and the pressure of the contracted hydraulic cylinder 11 increases.
【００１２】油圧シリンダ１１の圧力が減少すると蓄圧
器１４から当該油圧シリンダへ圧油が供給され、油圧シ
リンダ１１の圧力が増加するとその油圧シリンダ１１か
らの圧油が蓄圧器１４に蓄圧される。このような油圧シ
リンダ１１と蓄圧器１４との間の圧油の供給、蓄積によ
り、路面の凹凸により各油圧シリンダ１１が外力を受け
た場合、それらのピストン１１ｐがストロークして当該
外力を吸収し、車体２への振動の伝達を吸収する。ここ
で、油圧シリンダ１１の圧力の変化とピストン１１ｐの
ストロークとの関係は、蓄圧器１４に蓄圧されたガスの
圧縮弾性によって決定され、このガスの圧縮弾性が振動
を吸収することとなり、ばね機能として作用する。When the pressure of the hydraulic cylinder 11 decreases, pressure oil is supplied from the pressure accumulator 14 to the hydraulic cylinder, and when the pressure of the hydraulic cylinder 11 increases, the pressure oil from the hydraulic cylinder 11 is accumulated in the pressure accumulator 14. When each hydraulic cylinder 11 receives an external force due to the unevenness of the road surface due to the supply and accumulation of the pressure oil between the hydraulic cylinder 11 and the pressure accumulator 14, those pistons 11p stroke to absorb the external force. , Absorbs the transmission of vibration to the vehicle body 2. Here, the relationship between the change in the pressure of the hydraulic cylinder 11 and the stroke of the piston 11p is determined by the compression elasticity of the gas accumulated in the pressure accumulator 14, and the compression elasticity of this gas absorbs the vibration, and the spring function. Acts as.
【００１３】又、ピストン１１ｐのストロークの変化が
速い（振動の周期が短い）場合、各油圧シリンダ１１お
よび蓄圧器１４の間の圧油の移動は、配管１２に介在す
る絞り１３により制限され、この結果、短い周期の振動
は減衰せしめられる。When the stroke of the piston 11p changes rapidly (oscillation cycle is short), the movement of the pressure oil between each hydraulic cylinder 11 and the pressure accumulator 14 is restricted by the throttle 13 interposed in the pipe 12. As a result, the short cycle vibration is damped.
【００１４】さらに、各油圧シリンダ１１は配管１２に
より連通されているので、長い周期の振動に対しては各
油圧シリンダ１１のピストン１１ｐにどのようなストロ
ークが生じても、各油圧シリンダの圧力は等しくなる。
即ち、路面に凹凸があっても、各車輪４の接地圧を等し
く保持することができ、作業車両の接地性を高めて作業
性能への悪影響を排除することができる。Further, since the hydraulic cylinders 11 are communicated with each other by the pipes 12, the pressure of the hydraulic cylinders will be maintained no matter what stroke occurs in the piston 11p of the hydraulic cylinders 11 with respect to the vibration of a long cycle. Will be equal.
That is, even if there is unevenness on the road surface, the ground contact pressure of each wheel 4 can be maintained at the same level, and the ground contact of the work vehicle can be improved to eliminate adverse effects on work performance.
【００１５】このように、本実施例では、車体２とアク
スル３の左右との間に油圧シリンダ１１を装着し、それ
ら各油圧シリンダ１１および蓄圧器１４を配管１２で連
通し、配管１２に絞り１３を介在せしめたので、作業性
能への影響なく作業車両の走行中の振動を吸収、減衰せ
しめることができる。As described above, in this embodiment, the hydraulic cylinders 11 are mounted between the vehicle body 2 and the left and right sides of the axle 3, and the hydraulic cylinders 11 and the pressure accumulator 14 are connected to each other by the pipes 12, and the pipes 12 are throttled. Since 13 is interposed, it is possible to absorb and damp vibrations of the work vehicle during traveling without affecting work performance.
【００１６】図２は本発明の他の実施例に係る作業車両
の懸架装置の概略構成を示す正面図である。この図で、
図１に示す部分と同一又は等価な部分には同一符号が付
してある。１１ａ、１１ｂは図１に示す油圧シリンダと
同一の油圧シリンダ、１５は蓄圧器１４の出入口に配置
された絞りである。このように絞り１５を設けた場合
も、上記実施例と同様の作用効果を有するが、さらに、
各絞り１３の開口面積と絞り１５の開口面積とを適宜選
定することにより、ばね機能、ダンパ機能とタイヤ４の
接地性の両方を良好に調整することができる。これを図
３に示す特性曲線を参照しながら説明する。FIG. 2 is a front view showing a schematic structure of a suspension system for a work vehicle according to another embodiment of the present invention. In this figure,
The same or equivalent parts as those shown in FIG. 1 are designated by the same reference numerals. Reference numerals 11 a and 11 b are the same hydraulic cylinders as the hydraulic cylinder shown in FIG. 1, and 15 is a throttle arranged at the inlet and outlet of the pressure accumulator 14. Even when the diaphragm 15 is provided in this manner, the same operational effect as that of the above-described embodiment is obtained, but further,
By appropriately selecting the opening area of each diaphragm 13 and the opening area of the diaphragm 15, both the spring function, the damper function and the grounding property of the tire 4 can be satisfactorily adjusted. This will be described with reference to the characteristic curve shown in FIG.
【００１７】図３は、絞り１５の開口面積を各絞り１３
の開口面積より大きく選定した状態で、油圧シリンダ１
１ａに外力が作用したときの特性曲線を示し、曲線Ａは
油圧シリンダ１１ａのストローク、曲線Ｂは油圧シリン
ダ１１ｂのストローク、曲線Ｃは蓄圧器１４の流入圧油
の体積を示す。各曲線とも横軸に時間がとってある。Ｔ
1 は油圧シリンダ１１ａに作用する外力が比較的低周波
である区間、Ｔ2 は油圧シリンダ１１ａに作用する外力
が高周波である区間を示す。In FIG. 3, the aperture area of the diaphragms 15 is shown as
Hydraulic cylinder 1 with a larger opening area than
A characteristic curve when an external force acts on 1a is shown. Curve A shows the stroke of the hydraulic cylinder 11a, curve B shows the stroke of the hydraulic cylinder 11b, and curve C shows the volume of the inflow pressure oil of the pressure accumulator 14. The horizontal axis of each curve is time. T
1 indicates a section where the external force acting on the hydraulic cylinder 11a has a relatively low frequency, and T 2 indicates a section where the external force acting on the hydraulic cylinder 11a has a high frequency.
【００１８】区間Ｔ1 においては、各絞り１３、１５を
通過する圧油の流量は少なく、各絞り１３、１５の前後
の差圧も小さい。このため、油圧シリンダ１１ａが作動
したことによる油圧シリンダ１１ｂ側の絞り１３および
絞り１５と連結されている管路１２内の圧力はほとんど
上昇せず、蓄圧器１４の体積変化も曲線Ｃに示すように
少なく、したがって、油圧シリンダ１１ｂは油圧シリン
ダ１１ａの動作に応じて作動する。In the section T 1 , the flow rate of the pressure oil passing through the throttles 13 and 15 is small, and the differential pressure before and after the throttles 13 and 15 is also small. Therefore, the pressure in the conduit 12 connected to the throttle 13 and the throttle 15 on the hydraulic cylinder 11b side due to the operation of the hydraulic cylinder 11a hardly rises, and the volume change of the pressure accumulator 14 is also shown by the curve C. Therefore, the hydraulic cylinder 11b operates according to the operation of the hydraulic cylinder 11a.
【００１９】これに対して、区間Ｔ2 におけるように、
油圧シリンダ１１ａの動作の周波数が高くなると、各絞
り１３、１５を通過する圧油の流量が多くなり、各絞り
１３、１５で前後差圧が発生し、管路１２内の圧力が高
くなる。このとき、絞り１５の開口面積の方が油圧シリ
ンダ１１ｂ側の絞り１３の開口面積より大きいので、蓄
圧器１４の体積変化は曲線Ｃに示すように大きくなり、
この結果、油圧シリンダ１１ｂの動作は曲線Ｂに示すよ
うに小さくなり、ダンパ機能がより一層効いた動作とな
り、タイヤ４の接地性が良くなる。On the other hand, as in the section T 2 ,
When the frequency of operation of the hydraulic cylinder 11a increases, the flow rate of the pressure oil passing through the throttles 13 and 15 increases, and a differential pressure across the throttles 13 and 15 is generated, so that the pressure in the conduit 12 increases. At this time, since the opening area of the throttle 15 is larger than the opening area of the throttle 13 on the hydraulic cylinder 11b side, the volume change of the pressure accumulator 14 becomes large as shown by the curve C,
As a result, the operation of the hydraulic cylinder 11b becomes smaller as shown by the curve B, the damper function becomes more effective, and the grounding property of the tire 4 is improved.
【００２０】図４は本発明のさらに他の実施例に係る作
業車両の懸架装置の概略構成の側面図である。図で、図
１に示す部分と同一又は等価な部分には同一符号が付し
てある。２０は本実施例の作業車両を示す。２１は図１
に示すものと同じ懸架装置を示す。さきの実施例が作業
車両１０の前後両方のアクスル３に懸架装置を備えてい
るのに対して、本実施例の作業車両２０は一方のアクス
ル３にのみ懸架装置２１を備え、他方のアクスル３と車
体２とは直接固定されている。FIG. 4 is a side view of a schematic structure of a suspension system for a work vehicle according to still another embodiment of the present invention. In the figure, the same or equivalent parts as those shown in FIG. 1 are designated by the same reference numerals. Reference numeral 20 denotes the work vehicle of this embodiment. 21 is shown in FIG.
Shows the same suspension as shown in. The working vehicle 20 of this embodiment is provided with the suspension device 21 only on one axle 3 and the other axle 3 is provided, whereas the working example 20 is provided with the suspension device on both the front and rear axles 3 of the work vehicle 10. And the vehicle body 2 are directly fixed.
【００２１】通常、作業車両は一般の乗用車に比較して
重量が大きく、かつ、重心が高い。したがって、作業車
両が曲折走行する場合、ローリングの影響を大きく受け
ることになり、安定性に欠ける。ところが、本実施例で
は一方のアクスル３が車体２と固定されているので、上
記ローリングの影響を減少し得るのは明らかであり、ひ
いては作業車両走行の安定性を大きくすることができ
る。Generally, a work vehicle is heavier and has a higher center of gravity than a general passenger vehicle. Therefore, when the work vehicle travels in a bend, the work vehicle is greatly affected by rolling and lacks stability. However, in this embodiment, since the one axle 3 is fixed to the vehicle body 2, it is clear that the influence of the rolling can be reduced, and the stability of the running of the work vehicle can be increased.
【００２２】[0022]
【発明の効果】以上述べたように、本発明では、車体と
アクスルとの間に、アクスルの左右の油圧シリンダ、各
油圧シリンダを連通する配管、この配管に連通する蓄圧
器、および絞りを設けたので、作業性能に影響を及ぼす
ことなく作業車両走行時に生じる振動を吸収、減衰せし
めることができる。As described above, according to the present invention, between the vehicle body and the axle, the hydraulic cylinders on the left and right of the axle, the pipes connecting the hydraulic cylinders, the pressure accumulator communicating with the pipe, and the throttle are provided. Therefore, it is possible to absorb and damp the vibration generated when the work vehicle travels without affecting the work performance.
【図１】本発明の実施例に係る作業車両の懸架装置の概
略構成の正面図である。FIG. 1 is a front view of a schematic configuration of a suspension device for a work vehicle according to an embodiment of the present invention.
【図２】本発明の他の実施例に係る作業車両の懸架装置
の概略構成の側面図である。FIG. 2 is a side view of a schematic configuration of a suspension device for a work vehicle according to another embodiment of the present invention.
【図３】図２に示す懸架装置の動作を説明する特性図で
ある。FIG. 3 is a characteristic diagram illustrating an operation of the suspension device shown in FIG.
【図４】本発明のさらに他の実施例に係る作業車両の懸
架装置の概略構成の側面図である。FIG. 4 is a side view of a schematic configuration of a suspension device for a work vehicle according to still another embodiment of the present invention.
【図５】従来の作業車両の概略構成の正面図である。FIG. 5 is a front view of a schematic configuration of a conventional work vehicle.
【図６】図１に示す作業車両の側面図である。FIG. 6 is a side view of the work vehicle shown in FIG. 1.
２ 車体 ３ アクスル ４ 車輪 １０ 作業車両 １１ 油圧シリンダ １２ 配管 １３ 絞り １４ 蓄圧器 2 vehicle body 3 axle 4 wheel 10 work vehicle 11 hydraulic cylinder 12 piping 13 throttle 14 pressure accumulator
Claims (3)
後に取り付けられたアクスルと、タイヤが取り付けられ
前記各アクスルにより駆動される左右の車輪とで構成さ
れる作業車両において、前記アクスルのうちの少なくと
も一方のアクスルの左右と前記車体との間に結合された
各油圧シリンダと、これら油圧シリンダの油室を連結す
る配管と、この配管に連結された蓄圧器と、この蓄圧器
と前記各油圧シリンダとの間に少なくとも１つ配置され
た絞りとを設けたことを特徴とする作業車両の懸架装
置。1. A work vehicle comprising a vehicle body provided with a work mechanism, axles attached to the front and rear of the vehicle body, and left and right wheels to which tires are attached and driven by the respective axles. Each hydraulic cylinder connected between the left and right of at least one of the axles and the vehicle body, a pipe connecting the oil chambers of these hydraulic cylinders, a pressure accumulator connected to this pipe, this pressure accumulator and the above A suspension system for a work vehicle, comprising at least one throttle provided between each hydraulic cylinder.
圧器と前記各油圧シリンダとの間にそれぞれ配置されて
いることを特徴とする作業車両の懸架装置。2. The suspension system for a work vehicle according to claim 1, wherein the throttle is arranged between the pressure accumulator and each of the hydraulic cylinders.
圧器と前記配管との間に配置されていることを特徴とす
る作業車両の懸架装置。3. The suspension system for a work vehicle according to claim 1, wherein the throttle is disposed between the pressure accumulator and the pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP09135493A JP3304493B2 (en) | 1993-01-26 | 1993-04-19 | Work vehicle suspension |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1105893 | 1993-01-26 | ||
| JP5-11058 | 1993-01-26 | ||
| JP09135493A JP3304493B2 (en) | 1993-01-26 | 1993-04-19 | Work vehicle suspension |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06278438A true JPH06278438A (en) | 1994-10-04 |
| JP3304493B2 JP3304493B2 (en) | 2002-07-22 |
Family
ID=26346431
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP09135493A Expired - Lifetime JP3304493B2 (en) | 1993-01-26 | 1993-04-19 | Work vehicle suspension |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3304493B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2000047433A1 (en) | 1999-02-09 | 2000-08-17 | Hitachi Construction Machinery Co., Ltd. | Wheel type working vehicle |
| KR100757266B1 (en) * | 2005-07-27 | 2007-09-10 | 최길웅 | Guided vehicle with air balanced |
| CN112172440A (en) * | 2020-10-19 | 2021-01-05 | 合肥工业大学 | Active control device for resisting front pitching of car during braking |
-
1993
- 1993-04-19 JP JP09135493A patent/JP3304493B2/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2000047433A1 (en) | 1999-02-09 | 2000-08-17 | Hitachi Construction Machinery Co., Ltd. | Wheel type working vehicle |
| US6820877B1 (en) | 1999-02-09 | 2004-11-23 | Hitachi Construction Machinery Co., Ltd. | Wheeled type working vehicle |
| US7104548B2 (en) | 1999-02-09 | 2006-09-12 | Hitachi Construction Machinery Co., Ltd. | Wheeled type working vehicle |
| KR100757266B1 (en) * | 2005-07-27 | 2007-09-10 | 최길웅 | Guided vehicle with air balanced |
| CN112172440A (en) * | 2020-10-19 | 2021-01-05 | 合肥工业大学 | Active control device for resisting front pitching of car during braking |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3304493B2 (en) | 2002-07-22 |
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