JPH0634405Y2 - Drives for paved vehicles - Google Patents
Drives for paved vehiclesInfo
- Publication number
- JPH0634405Y2 JPH0634405Y2 JP1988071605U JP7160588U JPH0634405Y2 JP H0634405 Y2 JPH0634405 Y2 JP H0634405Y2 JP 1988071605 U JP1988071605 U JP 1988071605U JP 7160588 U JP7160588 U JP 7160588U JP H0634405 Y2 JPH0634405 Y2 JP H0634405Y2
- Authority
- JP
- Japan
- Prior art keywords
- pressure oil
- supply pipe
- flow
- pair
- pipe
- 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
Landscapes
- Road Paving Machines (AREA)
Description
【考案の詳細な説明】 〔産業上の利用分野〕 本考案は、アスファルトフィニッシャ、ベースペーバ等
の舗装車両の駆動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 drive device for a paved vehicle such as an asphalt finisher or a base paver.
この種の舗装車両の駆動装置として、左右一対の車輪の
それぞれに各車輪を駆動する油圧モータが設けられ、油
圧ポンプの圧油を分岐管でそのまま分流して左右の油圧
モータに供給するもの、及び、油圧ポンプの圧油を分流
弁で分流して一対の油圧モータに供給するもの（実開昭
63−25635号公報）が知られている。As a drive device for this type of paved vehicle, a hydraulic motor that drives each wheel is provided on each of a pair of left and right wheels, and the pressure oil of the hydraulic pump is split as it is in a branch pipe and supplied to the left and right hydraulic motors. Also, the pressure oil of the hydraulic pump is divided by a flow dividing valve to be supplied to a pair of hydraulic motors (actual exploitation)
63-25635) is known.
上記前者の駆動装置においては、舗装作業の低速走行時
に、左右の車輪の走行抵抗が路面の状況などで異なる
と、走行抵抗の少ない側の油圧モータに圧油が多く流
れ、走行抵抗の大きい側の油圧モータに圧油が流れにく
くなる。このため、舗装車両の走行する方向が徐々に変
わってしまうことになる。また、いずれか一方の車輪が
地面から離れた場合には、地面から離れた側の油圧モー
タに総ての圧油が流れてしまい、地面に着いている側の
車輪に駆動力が発生しなくなってしまうという問題があ
る。In the former drive device, when the running resistance of the left and right wheels is different due to road conditions during low-speed traveling of the paving work, a large amount of pressure oil flows to the hydraulic motor on the side with less running resistance, and the side with greater running resistance. It becomes difficult for pressure oil to flow to the hydraulic motor. Therefore, the traveling direction of the paved vehicle gradually changes. Also, if either wheel moves away from the ground, all the pressure oil will flow to the hydraulic motor on the side away from the ground, and no driving force will be generated on the wheels on the ground. There is a problem that it will end up.
後者の駆動装置には前者装置のような問題はないが、分
流弁が圧油の抵抗となるため、舗装車両の回送時等に、
高速度で効率よく走行させることができないという問題
がある。The latter drive device does not have the same problem as the former device, but since the shunt valve acts as a resistance to pressure oil, it can
There is a problem that the vehicle cannot run efficiently at high speed.
本考案は上記事情に鑑みてなされてものであり、舗装作
業時等の低速走行と、回送時等の高速走行を支障なく円
滑に行うことがきる舗装車両の駆動装置を提供すること
を目的とする。The present invention has been made in view of the above circumstances, and an object thereof is to provide a drive device for a paved vehicle that can smoothly perform low-speed traveling such as paving work and high-speed traveling such as forwarding without trouble. To do.
上記の目的を達成するために、本考案は、車体の左右一
対の車輪をそれぞれ個々に駆動する油圧モータの一対の
管路に、圧油を同一の比率で分流して上記一対の油圧モ
ータに流す分流弁を備えた第１分岐管と、上記油圧モー
タへの圧油の流れを自由にしてその逆の流れを止める一
対のチェック弁が圧油の流れ方向を相互に逆にして設け
られた第２分岐管とを、互いに並列に連結し、上記分流
弁に第１供給管を、また上記一対のチェック弁の間の第
２分岐管に第２供給管をそれぞれ連結し、上記第１供給
管と第２供給管に、第１位置において第２供給管を圧油
供給源に連絡して第１供給管を閉じ、また第２位置にお
いて第１供給管を圧油供給源に連絡して第２供給管と圧
油供給源の連絡を断つ電磁切換弁を接続した構成とし
た。In order to achieve the above object, the present invention provides a pair of hydraulic motors that individually drive a pair of left and right wheels of a vehicle body, and divides the pressure oil at the same ratio into the pair of hydraulic motors. A first branch pipe provided with a flow-dividing valve and a pair of check valves for freeing the flow of pressure oil to the hydraulic motor and stopping the opposite flow are provided with the flow directions of the pressure oil being opposite to each other. A second branch pipe is connected in parallel with each other, a first supply pipe is connected to the flow dividing valve, and a second supply pipe is connected to a second branch pipe between the pair of check valves, to thereby supply the first supply. Connecting the second supply pipe to the pressure oil supply source in the first position to close the first supply pipe, and the first supply pipe to the pressure oil supply source in the second position. An electromagnetic switching valve for disconnecting the connection between the second supply pipe and the pressure oil supply source was connected.
電磁切換弁を第１位置にして第２供給管を圧油供給源に
連絡した場合は、圧油供給源の圧油は各チェック弁を通
ってほとんど抵抗なく各油圧モータに供給されるので、
舗装車両を高速度で効率的に回送することができる。こ
の時は、第１供給管は電磁切換弁によって閉じられてい
るので、油圧モータに供給される圧油が第１供給管を逆
流して外部に漏出することはない。When the electromagnetic switching valve is set to the first position and the second supply pipe is connected to the pressure oil supply source, the pressure oil of the pressure oil supply source is supplied to each hydraulic motor through each check valve with almost no resistance.
Paved vehicles can be efficiently routed at high speed. At this time, since the first supply pipe is closed by the electromagnetic switching valve, the pressure oil supplied to the hydraulic motor does not flow backward through the first supply pipe and leak to the outside.
また、電磁切換弁を第２位置に切り換えて第１供給管を
圧油モータに連絡した場合は、圧油供給源の圧油は分流
弁で同一の比率で分流されて各油圧モータに供給される
ので、左右の車輪の走行抵抗が異なる場合や一方の車輪
が地面から離れたような場合でも、舗装車両を低速度で
支障なく走行させ、舗装作業を円滑に行うことができ
る。この時は、一対のチェック弁が第２分岐管の圧油の
逆流を防止する。Further, when the electromagnetic switching valve is switched to the second position and the first supply pipe is connected to the pressure oil motor, the pressure oil of the pressure oil supply source is diverted at the same ratio by the shunt valve and supplied to each hydraulic motor. Therefore, even if the running resistances of the left and right wheels are different or one of the wheels moves away from the ground, the paving vehicle can be run at a low speed without trouble and the paving work can be performed smoothly. At this time, the pair of check valves prevent the backflow of the pressure oil in the second branch pipe.
以下、本考案をアスファルトフィニッシャに適用した場
合の実施例を第１図ないし第４図を参照して説明する。An embodiment in which the present invention is applied to an asphalt finisher will be described below with reference to FIGS. 1 to 4.
アスファルトフィニッシャは、第１図と第２図に示すよ
うに、後輪１および前輪（車輪）２を回転駆動させて車
体３を走行させながら、ホッパ４に投入されたアスファ
ルト合材をコンベヤ（バーフィーダ）５で後方のスプレ
ッディングスクリュー６に送り、ここで左右に一様に広
げてこれを支持アーム７の後方に懸吊された敷均し装置
８により路面上に平らに敷き均すことができるように構
成したものである。この場合、前輪２が操向を兼ねた駆
動輪として機能するように構成されているが、必要に応
じて前輪２を駆動させずに後輪１のみで駆動することも
できる。As shown in FIGS. 1 and 2, the asphalt finisher rotates the rear wheels 1 and the front wheels (wheels) 2 to drive the vehicle body 3 while driving the asphalt mixture fed into the hopper 4 into a conveyor (bar). It can be fed to the rear spreading screw 6 with a feeder 5 and spread evenly left and right here, and can be spread evenly on the road surface by a leveling device 8 suspended behind the support arm 7. It is configured to be possible. In this case, the front wheel 2 is configured to function as a driving wheel that also serves as a steering wheel, but it is also possible to drive only the rear wheel 1 without driving the front wheel 2 if necessary.
上記車体３には、第３図に示すようにエンジン９が搭載
され、エンジン９には、主となる油圧ポンプ（圧油供給
源）10,11および作業用あるいはパイロット用の幾つか
の油圧ポンプ12が連結されている。一方、後輪１には、
チェーン13やデファレンシャルギヤ14等の動力伝達機構
を介して後輪駆動用の油圧モータ15が連結されている。An engine 9 is mounted on the vehicle body 3 as shown in FIG. 3, and the engine 9 has main hydraulic pumps (pressure oil supply sources) 10 and 11 and several hydraulic pumps for work or pilot. 12 are connected. On the other hand, on the rear wheel 1,
A hydraulic motor 15 for driving rear wheels is connected via a power transmission mechanism such as a chain 13 and a differential gear 14.
油圧モータ15は、電磁比例制御弁16を介して油圧ポンプ
10,11に連結されている。また、各前輪2,2にもそれぞれ
前輪駆動用の油圧モータ17,17が連結されている。油圧
モータ17は、ドレン圧力によって斜板の角度が変わる可
変容量形油圧モータである。各油圧モータ17,17の前進
側の管路17a,17aは、分流弁18等を介して電磁比例制御
弁19に連結されており、電磁比例制御弁19は、さらに油
圧ポンプ10,11に連結されている。また、油圧モータ17,
17のドレン管路20は、電磁弁21等を介して油タンク25
（第４図）に連結されている。The hydraulic motor 15 is a hydraulic pump via an electromagnetic proportional control valve 16.
It is connected to 10,11. Further, hydraulic motors 17, 17 for driving the front wheels are also connected to the front wheels 2, 2, respectively. The hydraulic motor 17 is a variable displacement hydraulic motor in which the angle of the swash plate changes depending on the drain pressure. Pipe lines 17a, 17a on the forward side of each hydraulic motor 17, 17 are connected to an electromagnetic proportional control valve 19 via a shunt valve 18, etc., and the electromagnetic proportional control valve 19 is further connected to the hydraulic pumps 10, 11. Has been done. In addition, the hydraulic motor 17,
The drain line 20 of 17 is connected to the oil tank 25 via the solenoid valve 21 and the like.
(FIG. 4).
第４図は、このような構成の駆動系の油圧系統を示して
いる。FIG. 4 shows a hydraulic system of a drive system having such a configuration.
分流弁18は、各油圧モータ17,17の管路17a,17aに両端を
連結した分岐管42に設けられており、供給管45を通じて
供給された圧油を１対１の比率で分流して各油圧モータ
17,17に供給するようになっている。また、各油圧モー
タ17,17のドレンは、ドレン管路20で合流され、電磁弁2
1を介して管路23あるいは管路24から油タンク25に流れ
るようになっている。電磁弁21は、中立位置でドレン管
路20と管路23とを連通し、通電時に切り換わって、該ド
レン管路20と管路24とを連通するものである。The flow dividing valve 18 is provided in the branch pipe 42 whose both ends are connected to the pipe lines 17a, 17a of the respective hydraulic motors 17, 17, and divides the pressure oil supplied through the supply pipe 45 at a ratio of 1: 1. Each hydraulic motor
It is designed to supply to 17,17. Further, the drains of the respective hydraulic motors 17 and 17 are merged in the drain pipe line 20, and the solenoid valve 2
It flows from the pipe line 23 or the pipe line 24 to the oil tank 25 via 1. The solenoid valve 21 connects the drain pipe 20 and the pipe 23 at a neutral position, and switches when energized to connect the drain pipe 20 and the pipe 24.
管路23には、油タンク25から電磁弁21への流れを阻止す
る方向のチェック弁26が設けられている。チェック弁26
は、クラッキング圧が１kg/cm2〜２kg/cm2に設定された
ものである。また、ドレン管路20には、電磁弁21に並列
にチェック弁27が設けられている。このチェック弁27
は、ドレン管路20への流れを阻止する方向に向けられて
設けられ、クラッキング圧がチェック弁26と等しく設定
されたものである。そして、このチェック弁27の下流側
は管路24に連結されている。The pipe line 23 is provided with a check valve 26 for blocking the flow from the oil tank 25 to the solenoid valve 21. Check valve 26
It is one in which cracking pressure is set to 1kg / cm 2 ~2kg / cm 2 . In addition, a check valve 27 is provided in the drain conduit 20 in parallel with the solenoid valve 21. This check valve 27
Is provided so as to be directed in a direction in which the flow to the drain line 20 is blocked, and the cracking pressure is set to be equal to that of the check valve 26. The downstream side of the check valve 27 is connected to the pipe line 24.
また、各油圧モータ17,17の管路17a,17aには、分岐管37
が前記分岐管42と並列に連結されている。分岐管37に
は、各油圧モータ17,17への圧油の流れを自由にしてそ
の逆の流れを止める一対のチェック弁43,43が、圧油の
流れ方向を相互に逆にして背中合せ状に設けられ、該チ
ェック弁43,43の間の分岐管37に供給管44が連結されて
いる。In addition, the branch pipes 37a and 17a of the hydraulic motors 17 and 17 are connected to the branch pipes 37
Are connected in parallel with the branch pipe 42. A pair of check valves 43, 43 are provided in the branch pipe 37 so that the flow of pressure oil to each hydraulic motor 17, 17 is stopped and the reverse flow is stopped. And a supply pipe 44 is connected to the branch pipe 37 between the check valves 43.
そして、上記供給管44,45には、舗装車両の前進時に、
電磁比例制御弁19等を通じて油圧モータ17,17に圧油を
供給する管路22が電磁切換弁41を介して接続されてい
る。電磁切換弁41は、第１位置（第４図参照）において
一方の供給管44を油圧ポンプ10,11に連絡して他方の供
給管45を閉じ、また通電によってソレノイドが励磁され
た第２位置において上記他方の供給管45を油圧ポンプ1
0,11に連絡して上記一方の供給管44と油圧ポンプ10,11
の連絡を断ち、供給管44を閉じるものである。And, when the paving vehicle is moving forward,
A pipeline 22 for supplying pressure oil to the hydraulic motors 17, 17 through an electromagnetic proportional control valve 19 etc. is connected via an electromagnetic switching valve 41. The electromagnetic switching valve 41 connects the one supply pipe 44 to the hydraulic pumps 10 and 11 at the first position (see FIG. 4) to close the other supply pipe 45, and the second position where the solenoid is excited by energization. At the other side of the supply pipe 45 in the hydraulic pump 1
Contact 0,11 to supply pipe 44 and hydraulic pump 10,11
Is disconnected and the supply pipe 44 is closed.
次に、上記のように構成された駆動装置の作用を説明す
る。Next, the operation of the drive device configured as described above will be described.
各一対の後輪1,1と前輪2,2の４輪で駆動する場合であっ
て、高速運転するとき、または前輪２が空転しないと
き、即ち、回送するときで、完成整備された道路を高速
走行するので前輪２の空転が起きないときには、電磁切
換弁41に通電しないで該電磁切換弁41を図示の位置にし
ておき、供給管44と管路22とを連通状態にする。そうし
て、各電磁比例制御弁16,19に所定の電流を流すと、後
輪１と前輪２との周速を同じにするような流量の圧油が
各電磁比例制御弁16,19から後輪駆動用の油圧モータ15
および前輪駆動用の油圧モータ17,17に流れる。この
際、各前輪駆動用の油圧モータ17,17には、電磁切換弁4
1を経て供給管44に流れた圧油が、チェック弁43,43を有
する分岐管37をほとんど抵抗なく流れる。この場合に
は、走行抵抗の小さい側の油圧モータ17への流量が多く
なり、走行抵抗の大きい側の油圧モータ17への流量が少
なくなるが、前記のように道路が完成整備されていて、
各前輪2,2にかかる走行抵抗に大きな差を生じることは
なく、また一方の前輪２が浮いて路面から離れるような
こともないので、走行は支障なく円滑に行われる。When driving with a pair of rear wheels 1,1 and front wheels 2,2, and when driving at high speed, or when the front wheels 2 do not idle, that is, when they are forwarded, Since the vehicle travels at a high speed, when the front wheels 2 do not spin idle, the electromagnetic switching valve 41 is not energized and the electromagnetic switching valve 41 is left at the position shown in the figure, so that the supply pipe 44 and the pipeline 22 are in communication with each other. Then, when a predetermined current is passed through the electromagnetic proportional control valves 16 and 19, pressure oil having a flow rate that makes the peripheral speeds of the rear wheel 1 and the front wheel 2 the same is generated from the electromagnetic proportional control valves 16 and 19. Rear wheel drive hydraulic motor 15
And to the hydraulic motors 17, 17 for driving the front wheels. At this time, the electromagnetic switching valve 4 is attached to the hydraulic motors 17, 17 for driving the front wheels.
The pressure oil flowing to the supply pipe 44 via 1 flows through the branch pipe 37 having the check valves 43, 43 with almost no resistance. In this case, the flow rate to the hydraulic motor 17 on the side where the running resistance is small increases, and the flow rate to the hydraulic motor 17 on the side where the running resistance is large decreases, but the road is completed and maintained as described above,
There is no great difference in running resistance applied to the front wheels 2,2, and since one front wheel 2 does not float and separate from the road surface, the running is smoothly performed.
また、後輪1,1と前輪2,2の４輪で駆動する場合であっ
て、低速運転または前輪が空転するとき、即ち、舗装作
業時、または作業現場周辺の未整備地や未完成道路を低
速走行するときには、電磁切換弁41に通電して該電磁切
換弁41を切り換える。そうすると、供給管45と管路22と
が連通状態になり、管路22から供給された圧油が分流弁
18を通って、それぞれの油圧モータ17,17に流れる。こ
の際、各前輪駆動用油圧モータ17,17には、分流弁18で
１対１に分流された圧油が流れる。分流後の圧油は、各
チェック弁43,43で合流が阻止されるので、分岐管37を
通って他の側の油圧モータ17に流れることがない。した
がって、一対の前輪2,2の走行抵抗に差が生じたり、一
方の側の前輪２が接地せずに空転するようなことがあっ
ても、一対の前輪2,2は同速度で確実に回転して舗装車
両を駆動する。Also, when driving with four wheels of rear wheels 1 and 1 and front wheels 2 and 2, when driving at low speed or when the front wheels run idle, that is, at the time of paving work, or unfinished land or unfinished road around the work site. When traveling at low speed, the electromagnetic switching valve 41 is energized to switch the electromagnetic switching valve 41. Then, the supply pipe 45 and the pipe line 22 are brought into communication with each other, and the pressure oil supplied from the pipe line 22 divides the flow dividing valve.
Through 18 to each hydraulic motor 17, 17. At this time, the pressure oil divided by the flow dividing valve 18 in a one-to-one manner flows through the front wheel drive hydraulic motors 17, 17. The divided pressure oil is prevented from flowing into the hydraulic motor 17 on the other side through the branch pipe 37 because the check valves 43, 43 prevent the pressure oil from merging. Therefore, even if there is a difference in running resistance between the pair of front wheels 2, 2 or the front wheel 2 on one side spins without touching the ground, the pair of front wheels 2, 2 can reliably operate at the same speed. Rotate to drive paved vehicles.
また、後輪1,1と前輪2,2の４輪で駆動する場合であっ
て、高速運転するとき、または前輪２が空転しない場合
について更に詳述すると、電磁切換弁41に通電しないで
該電磁切換弁41を図示の位置に切り換えるとともに、電
磁弁21に通電し該電磁弁21を切り換えておく。そうし
て、各電磁比例制御弁16,19に所定の電流を流すと、後
輪１と前輪２との周速を同じにするような流量の圧油が
各電磁比例制御弁16,19から油圧モータ15および油圧モ
ータ17,17に流れる。そして、油圧モータ17,17には、分
流弁18で１対１に分流された圧油が流れる。この際、各
油圧モータ17,17のドレンは、ドレン管路20、電磁弁21
を通ってチェック弁27を迂回して管路24に入り、さらに
該管路24によりチェック弁26を迂回して油タンク25に抵
抗なく流れる。そして、上記ドレンの圧力は、零に近づ
き、各油圧モータ17,17は、斜板角が最大になり、供給
された圧油によって所定のトルクを発生した状態で、回
転駆動されることになる。Further, in the case of driving with four wheels of the rear wheels 1,1 and the front wheels 2,2, when operating at high speed or the case where the front wheels 2 do not run idle, more detailed description will be made. The electromagnetic switching valve 41 is switched to the illustrated position, and the electromagnetic valve 21 is energized to switch the electromagnetic valve 21. Then, when a predetermined current is passed through the electromagnetic proportional control valves 16 and 19, pressure oil having a flow rate that makes the peripheral speeds of the rear wheel 1 and the front wheel 2 the same is generated from the electromagnetic proportional control valves 16 and 19. It flows to the hydraulic motor 15 and the hydraulic motors 17, 17. Then, the pressure oil divided by the flow dividing valve 18 in a one-to-one manner flows through the hydraulic motors 17, 17. At this time, the drain of each hydraulic motor 17, 17 is connected to the drain conduit 20 and the solenoid valve 21.
And bypasses the check valve 27 to enter the pipeline 24, and further bypasses the check valve 26 by the pipeline 24 to flow into the oil tank 25 without resistance. Then, the pressure of the drain approaches zero, and each hydraulic motor 17, 17 is rotationally driven in a state where the swash plate angle is maximized and a predetermined torque is generated by the supplied pressure oil. .
他方、後輪1,1のみを駆動させて舗装車両を走行する、
即ち、一対の後輪駆動で走行するときには、電磁弁21へ
の通電を停止して、該電磁弁21を中立位置に切り換え、
油圧モータ17,17のドレンが上記チェック弁27を迂回し
て管路23、チェック弁26を通って油タンク25に流れるよ
うにする。そうすると、各油圧モータ17,17のドレン圧
力が１kg/cm2以上になり、各油圧モータ17,17の斜板角
が零になる。このため、各油圧モータ17,17は、圧油が
供給されても、該圧油によってトルクが発生した状態で
回転駆動されることなく、自由回転状態になる。この
際、各油圧モータ17,17に供給する圧油の流量を、各油
圧モータ17,17からのドレン量よりやや多くなるように
電磁比例制御弁19の開度を設定する。On the other hand, drive only the rear wheels 1, 1 to drive the paved vehicle,
That is, when traveling with a pair of rear wheel drives, the energization of the solenoid valve 21 is stopped and the solenoid valve 21 is switched to the neutral position,
The drains of the hydraulic motors 17, 17 bypass the check valve 27 and flow into the oil tank 25 through the pipe line 23 and the check valve 26. Then, the drain pressure of each hydraulic motor 17, 17 becomes 1 kg / cm 2 or more, and the swash plate angle of each hydraulic motor 17, 17 becomes zero. Therefore, even if the hydraulic oil is supplied, the hydraulic motors 17, 17 are not driven to rotate in a state in which torque is generated by the hydraulic oil, and are brought into a freely rotating state. At this time, the opening degree of the electromagnetic proportional control valve 19 is set so that the flow rate of the pressure oil supplied to each hydraulic motor 17, 17 is slightly larger than the drain amount from each hydraulic motor 17, 17.
さらに、電磁弁21の切換時に、瞬間的に電磁弁21により
ドレンの流れが阻止された場合には、チェック弁27が開
いて該ドレンを管路24を通して油タンク25に逃がす。Further, when the flow of the drain is momentarily blocked by the solenoid valve 21 when the solenoid valve 21 is switched, the check valve 27 is opened to allow the drain to escape to the oil tank 25 through the pipe line 24.
上記のように構成された駆動装置においては、分流弁18
が前進時の油圧モータ17,17の圧油供給側に設けられて
いるので、各油圧モータ17,17に１対１の比率で分流し
た圧油を流すことができる。このため、左右の前輪2,2
の走行抵抗が異なる場合でも、各油圧モータ17,17に同
量の圧油を流すことができ、走行直進性を向上させるこ
とができる。また、仮に片側の前輪２が地面から離れた
場合でも、地面に着いている側の前輪２で駆動すること
ができる。In the drive device configured as described above, the shunt valve 18
Is provided on the pressure oil supply side of the hydraulic motors 17 and 17 during forward movement, so that the pressure oil divided at a ratio of 1: 1 can flow to the hydraulic motors 17 and 17. Therefore, the left and right front wheels 2,2
Even when the running resistances of the above are different, the same amount of pressure oil can be made to flow to the respective hydraulic motors 17, 17, and the straight running performance can be improved. Further, even if the front wheel 2 on one side is separated from the ground, it can be driven by the front wheel 2 on the side landing on the ground.
また、電磁弁21を切り換えることによって、油圧モータ
17を駆動状態にしたり、空転状態にしたりすることがで
きるので、２輪駆動と４輪駆動とを簡単に使い分けるこ
とができる。Also, by switching the solenoid valve 21, the hydraulic motor
Since 17 can be driven or idled, two-wheel drive and four-wheel drive can be easily used separately.
以上説明したように、本考案に係る舗装車両の駆動装置
は、車体の左右一対の車輪をそれぞれ個々に駆動する油
圧モータの一対の管路に、圧油を同一の比率で分流して
上記一対の油圧モータに流す分流弁を備えた第１分岐管
と、上記油圧モータへの圧油の流れを自由にしてその逆
の流れを止める一対のチェック弁が圧油の流れ方向を相
互に逆にして設けられた第２分岐管とが、互いに並列に
連結され、上記分流弁に第１供給管が、また上記一対の
チェック弁の間の第２分岐管に第２供給管がそれぞれ連
結され、上記第１供給管と第２供給管には、第１位置に
おいて第２供給管を圧油供給源に連絡して第１供給管を
閉じ、また第２位置において第１供給管を圧油供給源に
連絡して第２供給管と圧油供給源の連絡を断つ電磁切換
弁が接続された構成とされているので、舗装作業時に、
左右一対の車輪の走行抵抗に大きな差が出たり、或いは
一方の車輪が地面から離れるようなことがあっても、電
磁切換弁の切換えで圧油を分流弁で同一の比率に分流し
て一対の油圧モータに流すことにより、舗装車両を低速
度で直進させて舗装作業を支障なく円滑に行うことがで
きる。As described above, in the paving vehicle drive device according to the present invention, the pressure oil is shunted at the same ratio to the pair of pipelines of the hydraulic motor that individually drives the pair of left and right wheels of the vehicle body. The first branch pipe provided with a diversion valve for flowing to the hydraulic motor and the pair of check valves for freeing the flow of pressure oil to the hydraulic motor and stopping the reverse flow reverse the flow directions of the pressure oil. A second branch pipe provided in parallel with each other, the first branch pipe is connected to the flow dividing valve, and the second branch pipe is connected to the second branch pipe between the pair of check valves. In the first supply pipe and the second supply pipe, the second supply pipe is connected to the pressure oil supply source to close the first supply pipe at the first position, and the first supply pipe is supplied with the pressure oil at the second position. A solenoid valve that connects the second supply pipe and the pressure oil supply source by disconnecting the second supply pipe. Because it is the, at the time of paving work,
Even if there is a large difference in running resistance between the pair of left and right wheels, or if one of the wheels separates from the ground, pressure oil is diverted by the shunt valve to the same ratio by switching the electromagnetic switching valve. It is possible to make the paving vehicle go straight at a low speed and smoothly carry out the paving work without causing any trouble by flowing it to the hydraulic motor.
また、舗装車両の回送時には、電磁切換弁の切換えによ
って、圧油を流通抵抗の小さい第２分岐管を介して一対
の油圧モータに流すことにより、舗装車両を高速度で効
率よく走行させることができる。In addition, when the paved vehicle is forwarded, the paved vehicle can efficiently travel at a high speed by switching the electromagnetic switching valve to flow the pressure oil to the pair of hydraulic motors through the second branch pipe having a small flow resistance. it can.
第１図ないし第４図は本考案の実施例を示す図であっ
て、第１図はアスファルトフィニッシャの側面図、第２
図は同アスファルトフィニッシャの平面図、第３図は同
アスファルトフィニッシャの駆動装置の基本構成を示す
図、第４図は同駆動装置の油圧系統図である。 ２……前輪（車輪） 10,11……油圧ポンプ（圧油供給源） 17……油圧モータ 17a……管路 18……分流弁 37,42……分岐管 41……電磁切換弁 43……チェック弁 44,45……供給管1 to 4 are views showing an embodiment of the present invention, wherein FIG. 1 is a side view of an asphalt finisher, and FIG.
FIG. 3 is a plan view of the asphalt finisher, FIG. 3 is a diagram showing a basic configuration of a drive device of the asphalt finisher, and FIG. 4 is a hydraulic system diagram of the drive device. 2 …… Front wheel (wheel) 10,11 …… Hydraulic pump (pressure oil supply source) 17 …… Hydraulic motor 17a …… Pipe line 18 …… Shunt valve 37,42 …… Branch pipe 41 …… Electromagnetic switching valve 43… … Check valves 44,45 …… Supply pipe
Claims (1)
れぞれ個々に駆動する油圧モータ（17,17）の一対の管
路（17a,17a）に、圧油を同一の比率で分流して上記一
対の油圧モータ（17,17）に流す分流弁（18）を備えた
第１分岐管（42）と、上記油圧モータ（17,17）への圧
油の流れを自由にしてその逆の流れを止める一対のチェ
ック弁（43,43）が圧油の流れ方向を相互に逆にして設
けられた第２分岐管（37）とが、互いに並列に連結さ
れ、上記分流弁（18）に第１供給管（45）が、また上記
一対のチェック弁（43,43）の間の第２分岐管（37）に
第２供給管（44）がそれぞれ連結され、上記第１供給管
（45）と第２供給管（44）には、第１位置において第２
供給管（44）を圧油供給源（10,11）に連絡して第１供
給管（45）を閉じ、また第２位置において第１供給管
（45）を圧油供給源（10,11）に連絡して第２供給管（4
4）と圧油供給源（10,11）の連絡を断つ電磁切換弁（4
1）が接続されたことを特徴とする舗装車両の駆動装
置。1. A pair of pipes (17a, 17a) of a hydraulic motor (17, 17) for individually driving a pair of left and right wheels (2, 2) of a vehicle body (3), respectively, with the same proportion of pressure oil. The first branch pipe (42) provided with a flow dividing valve (18) that divides the flow of water into the pair of hydraulic motors (17, 17) and frees the flow of pressure oil to the hydraulic motors (17, 17). And a second branch pipe (37) in which a pair of check valves (43, 43) for stopping the reverse flow of the pressure oil are provided so that the flow directions of the pressure oil are opposite to each other. The first supply pipe (45) is connected to (18), and the second supply pipe (44) is connected to the second branch pipe (37) between the pair of check valves (43, 43). The supply pipe (45) and the second supply pipe (44) have a second position in the first position.
The supply pipe (44) is connected to the pressure oil supply source (10, 11) to close the first supply pipe (45), and the first supply pipe (45) is connected to the pressure oil supply source (10, 11) at the second position. ) Contact the second supply pipe (4
4) and the pressure oil supply source (10, 11) are disconnected from the solenoid operated directional control valve (4
A drive device for a paved vehicle, characterized in that 1) is connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1988071605U JPH0634405Y2 (en) | 1988-05-30 | 1988-05-30 | Drives for paved vehicles |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1988071605U JPH0634405Y2 (en) | 1988-05-30 | 1988-05-30 | Drives for paved vehicles |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01176114U JPH01176114U (en) | 1989-12-15 |
| JPH0634405Y2 true JPH0634405Y2 (en) | 1994-09-07 |
Family
ID=31296811
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1988071605U Expired - Lifetime JPH0634405Y2 (en) | 1988-05-30 | 1988-05-30 | Drives for paved vehicles |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0634405Y2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4688828B2 (en) * | 2007-02-20 | 2011-05-25 | 住友建機株式会社 | Paving machine |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6131506A (en) * | 1984-07-25 | 1986-02-14 | 前田道路株式会社 | Asphalt finisher |
| JPS6325635U (en) * | 1986-08-05 | 1988-02-19 |
-
1988
- 1988-05-30 JP JP1988071605U patent/JPH0634405Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH01176114U (en) | 1989-12-15 |
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