JPH0154483B2 - - Google Patents
Info
- Publication number
- JPH0154483B2 JPH0154483B2 JP59153238A JP15323884A JPH0154483B2 JP H0154483 B2 JPH0154483 B2 JP H0154483B2 JP 59153238 A JP59153238 A JP 59153238A JP 15323884 A JP15323884 A JP 15323884A JP H0154483 B2 JPH0154483 B2 JP H0154483B2
- Authority
- JP
- Japan
- Prior art keywords
- wheel drive
- drive mechanism
- hydraulic fluid
- wheels
- hydraulic
- 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
Links
- 230000007246 mechanism Effects 0.000 claims description 60
- 239000012530 fluid Substances 0.000 claims description 44
- 239000010426 asphalt Substances 0.000 claims description 29
- 239000003638 chemical reducing agent Substances 0.000 claims description 6
- 239000002131 composite material Substances 0.000 claims 1
- 239000000463 material Substances 0.000 claims 1
- 239000000203 mixture Substances 0.000 description 11
- 230000001141 propulsive effect Effects 0.000 description 4
- 230000009467 reduction Effects 0.000 description 4
- 239000000839 emulsion Substances 0.000 description 3
- 238000003860 storage Methods 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000007480 spreading Effects 0.000 description 1
- 238000003892 spreading Methods 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
Landscapes
- Road Paving Machines (AREA)
Description
【発明の詳細な説明】
この発明は、アスフアルト合材を敷設するアス
フアルトフイニツシヤに関するもので、前輪及び
後輪を駆動輪としたことを特徴とする。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an asphalt finisher for laying an asphalt mixture, and is characterized in that the front wheels and the rear wheels are driving wheels.
周知のように、自走しながらアスフアルト合材
を敷設するアスフアルトフイニツシヤには、後輪
を駆動して前進する後輪駆動式のものと、車輪の
代りに無限軌道を備えた無限軌道式のものとがあ
る。無限軌道式アスフアルトフイニツシヤは、無
限軌道の接地面積が広いので優れた推進力を有す
るが、無限軌道の構造が複雑なため製作工程が嵩
むばかりか、保守、点検が面倒である。更に無限
軌道式アスフアルトフイニツシヤでは、作業時以
外で走行する場合、例えばトラツクに載せたり、
或は作業現場まで移動する場合に、車輪駆動式ア
スフアルトフイニツシヤに比較すると機動性が著
しく劣る。また後輪駆動式アスフアルトフイニツ
シヤは、構造が簡単であるが、後輪の駆動力によ
つてのみ推進するので、敷設作業中に大きな走行
抵抗を受けたり、或いは舗装の下地面に散布した
乳剤等によつて後輪がスリツプした場合に、推進
力を失つたり左右のバランスを崩して進路を乱す
などの欠点がある。 As is well known, there are two types of asphalt finishers, which self-propel and lay asphalt mixture: rear-wheel-drive types that move forward by driving the rear wheels, and track-type ones that have endless tracks instead of wheels. There is something. Track-type asphalt finishers have excellent propulsive force because the ground contact area of the track is wide, but the structure of the track is complex, which not only increases the manufacturing process but also makes maintenance and inspection troublesome. Furthermore, when using a tracked asphalt finisher, it is necessary to drive it other than during work, for example by placing it on a truck or
Alternatively, when moving to a work site, the maneuverability is significantly inferior compared to a wheel-driven asphalt finisher. In addition, rear-wheel drive asphalt finishers have a simple structure, but because they are propelled only by the driving force of the rear wheels, they are subject to large running resistance during laying work, or the emulsion sprayed on the subsurface of the pavement. If the rear wheels slip due to such reasons, there are disadvantages such as loss of propulsion or loss of left/right balance, causing a disturbance in the course.
本発明は上記に鑑み提案されたもので、左右の
前輪に個々に取り付けられ、液圧モータを駆動源
とする前輪用駆動機構と、
後輪に取り付けられ、液圧モータを駆動源とす
る後輪用駆動機構と、
ポンプから圧送される作動液を前輪用駆動機構
の液圧モータよりも後輪用駆動機構の液圧モータ
に多く供給する分流器と、
ポンプから圧送される作動液を分流器を介して
上記前輪用駆動機構の液圧モータ及び後輪用駆動
機構の液圧モータに供給する状態と、ポンプから
圧送される作動液を分流器に供給することなく後
輪用駆動機構の液圧モータに供給する状態とに切
り換え可能な駆動切換弁と、
を備えることにより、アスフアルト合材を敷設す
る作業時には前輪及び後輪を駆動して大きく且つ
安定した駆動力を得ることができ、しかも走行方
向が乱れない緩速走行を可能とし、非作業時には
後輪のみを駆動して作業時よりも高速で走行でき
るアスフアルトフイニツシヤを提供しようとする
ものである。 The present invention has been proposed in view of the above, and includes a front wheel drive mechanism that is attached to the left and right front wheels individually and uses a hydraulic motor as a drive source, and a rear wheel drive mechanism that is attached to the rear wheel and uses a hydraulic motor as a drive source. A wheel drive mechanism, a flow divider that supplies more of the hydraulic fluid pumped from the pump to the hydraulic motor of the rear wheel drive mechanism than the hydraulic motor of the front wheel drive mechanism, and a flow divider that divides the hydraulic fluid pumped from the pump. A state in which the hydraulic fluid is supplied to the hydraulic motor of the front wheel drive mechanism and a hydraulic pressure motor of the rear wheel drive mechanism through the pump, and a state in which the hydraulic fluid is supplied to the rear wheel drive mechanism without supplying the hydraulic fluid under pressure from the pump to the flow divider. By being equipped with a drive switching valve that can switch between supplying to the hydraulic motor, it is possible to drive the front and rear wheels to obtain a large and stable driving force during the work of laying asphalt mixture. Moreover, the present invention aims to provide an asphalt finisher that enables slow running without disturbing the direction of travel, and that can drive only the rear wheels when not working and run at a higher speed than when working.
以下本発明を図面の実施例にもとづいて説明す
る。 The present invention will be explained below based on embodiments shown in the drawings.
アスフアルトフイニツシヤは、第１図に示すよ
うに、車体１の前部の左右に小径な前輪２，２
を、車体１の後部の左右に後輪３，３を有し、こ
れらの車輪によつて支えられた車体１にアスフア
ルト合材敷設機構を装備してある。 As shown in FIG.
The vehicle body 1 has rear wheels 3, 3 on the left and right sides of the rear part of the vehicle body 1, and the vehicle body 1 supported by these wheels is equipped with an asphalt mixture laying mechanism.
第１図に示すアスフアルト合材敷設機構は、車
体１の前部に設けたホツパー状の貯留部４と、車
体１の後端部に設けた敷設機５と、上記貯留部４
内のアスフアルト合材を敷設機５に供給するコン
ベア状の搬送機６などからなる。したがつて貯留
部４内にアスフアルト合材を投入すると、貯留部
４内のアスフアルト合材を搬送機６の作動により
敷設機５に供給し、このアスフアルト合材を敷設
機５の作動により舗装下地面に均等に敷均しなが
ら押し固めることができる。 The asphalt mixture laying mechanism shown in FIG.
It consists of a conveyor-like conveyor 6 that supplies the asphalt mixture inside to the laying machine 5. Therefore, when the asphalt mixture is put into the storage section 4, the asphalt mixture in the storage section 4 is supplied to the laying machine 5 by the operation of the conveyor 6, and this asphalt mixture is placed under the pavement by the operation of the laying machine 5. It can be compacted while spreading it evenly on the ground.
左右の前輪２は、第３，４図に示すように、左
右先端は二又状アーム７を有する揺動ビーム８を
車体１の下部に支軸９によつて上下方向に揺動可
能に軸着し、各二又状アーム７に傾動可能に軸着
した略コ字状ブラケツト１０に回転可能に取り付
けられており、前輪用駆動機構１１により個々に
回転駆動される。なお、左右の前輪２は、各ブラ
ケツト１０から延出した連動アーム１２間にタイ
ロツド１３を連結し、また一方のブラケツト１０
に設けた操舵アーム１４に操舵機構（図示せず）
を接続してあるので、運転席のハンドル１５を操
作すると、操作にしたがつて方向が変換する。 As shown in FIGS. 3 and 4, the left and right front wheels 2 have a swing beam 8 having a forked arm 7 at the left and right ends attached to the lower part of the vehicle body 1 by a support shaft 9 so as to be able to swing vertically. The front wheels are rotatably attached to substantially U-shaped brackets 10 which are tiltably pivoted to each forked arm 7, and are individually driven to rotate by a front wheel drive mechanism 11. The left and right front wheels 2 have a tie rod 13 connected between interlocking arms 12 extending from each bracket 10, and a tie rod 13 connected to one of the brackets 10.
A steering mechanism (not shown) is attached to the steering arm 14 provided in the
are connected, so when the steering wheel 15 on the driver's seat is operated, the direction changes according to the operation.
第３，４図に示す前輪用駆動機構１１は、減速
機を内装したケース回転型の液圧モータ１６を駆
動源として使用したもので、液圧モータ１６のケ
ースに前輪２のホイール２′をボルトにより止着
し、液圧モータ１６の軸１７をブラケツト１０に
固定し、該軸１７の端部に配管ブロツク１８を設
け、該配管ブロツク１８に作動液の配管を接続す
る。したがつて配管ブロツク１８から液圧モータ
１６内に作動液を圧送すると、液圧モータ１６の
回転力により当該前輪２を回転駆動することがで
きる。なお、左右の前輪２，２には同じ構造の前
輪用駆動機構１１，１１を個々に取り付け、左右
別個であるが同一状態で駆動するようにしてあ
る。 The front wheel drive mechanism 11 shown in FIGS. 3 and 4 uses a case-rotating hydraulic motor 16 with an internal reduction gear as a drive source. The front wheel 2' wheel 2' is mounted on the case of the hydraulic motor 16. The shaft 17 of the hydraulic motor 16 is fixed to the bracket 10 by bolts, a piping block 18 is provided at the end of the shaft 17, and a hydraulic fluid piping is connected to the piping block 18. Therefore, when the hydraulic fluid is pumped into the hydraulic motor 16 from the piping block 18, the front wheel 2 can be rotationally driven by the rotational force of the hydraulic motor 16. Note that front wheel drive mechanisms 11, 11 having the same structure are individually attached to the left and right front wheels 2, 2, so that the left and right wheels are driven separately but in the same state.
左右の後輪３は、車体１に設けた公知の懸架機
構（図示せず）により支承され、後輪用駆動機構
１９により回転駆動される。 The left and right rear wheels 3 are supported by a known suspension mechanism (not shown) provided on the vehicle body 1, and rotationally driven by a rear wheel drive mechanism 19.
第５図に示す後輪用駆動機構１９は、液圧モー
タ２０の出力側にクラツチ２１を介して減速機２
２を設け、該減速機２２の出力側に差動機２３を
有する中間駆動軸２４を接続し、該中間駆動軸２
４の左右端部に固定したスプロケツト２５と後輪
３のスプロケツト２６との間にチエーン２７を掛
けて接続する。したがつて液圧モータ２０に作動
液を圧送すると、減速機２２により減速した回転
力を差動機２３によつて左右の中間駆動軸に振り
分け、チエーン２７等を介して左右の後輪３，３
に各々伝達し、左右の後輪３を回転駆動すること
ができる。そして左右の後輪３の内、一方の走行
抵抗が異なると、差動機２３の作用により、他方
の後輪３の回転に差が生じる。 The rear wheel drive mechanism 19 shown in FIG.
2, an intermediate drive shaft 24 having a differential 23 is connected to the output side of the reducer 22, and the intermediate drive shaft 2
A chain 27 is hung between a sprocket 25 fixed to the left and right ends of the rear wheel 4 and a sprocket 26 of the rear wheel 3 to connect them. Therefore, when hydraulic fluid is force-fed to the hydraulic motor 20, the rotational force decelerated by the reducer 22 is distributed to the left and right intermediate drive shafts by the differential 23, and transmitted to the left and right rear wheels 3, 3 via the chain 27 etc.
The left and right rear wheels 3 can be rotationally driven. If the running resistance of one of the left and right rear wheels 3 is different, a difference occurs in the rotation of the other rear wheel 3 due to the action of the differential 23.
上記した前輪用、及び後輪用駆動機構１１，１
９に作動液を圧送するには、第５図及び第６図に
示すように、エンジン２８によつて稼動するメー
ンポンプ２９に分流器３０を接続し、該分流器３
０の一方の出口側回路を後輪用駆動機構１９の液
圧モータ２０に、他の出口側回路を前輪用駆動機
構１１の液圧モータ１６に弁を介して夫々接続す
る。分流器３０は、ポンプから圧送される作動液
を所定の割合に分流して夫々独立した回路を通じ
て各前輪用駆動機構１１と、後輪用駆動機構１９
とに供給することによつて前輪２の周速と後輪３
の周速とを同じにして、且つ高減速比とした後輪
用駆動機構１９に前輪用駆動機構１１よりも多く
の作動液を供給するもので、その割合は前、後輪
の直径、減速機の減速比によつて予め設定する。 The above-mentioned front wheel and rear wheel drive mechanisms 11, 1
9, as shown in FIGS. 5 and 6, a flow divider 30 is connected to the main pump 29 operated by the engine 28.
One outlet side circuit of 0 is connected to the hydraulic motor 20 of the rear wheel drive mechanism 19, and the other outlet side circuit is connected to the hydraulic motor 16 of the front wheel drive mechanism 11 via valves. The flow divider 30 divides the hydraulic fluid pumped from the pump into a predetermined proportion and passes it through independent circuits to each front wheel drive mechanism 11 and rear wheel drive mechanism 19.
The circumferential speed of front wheel 2 and the rear wheel 3 are
More hydraulic fluid is supplied to the rear wheel drive mechanism 19, which has the same circumferential speed and a high reduction ratio, than the front wheel drive mechanism 11, and the ratio depends on the diameters of the front and rear wheels, and the reduction ratio. Set in advance according to the reduction ratio of the machine.
そして第６図に示す実施例は、タンク３１から
の作動液を圧送するチヤージポンプ３２の吐出側
回路に走行、停止切換用電磁弁３３及び前後進切
換用弁３４等を設けてある。したがつて走行、停
止切換用電磁弁３３を運転席で遠隔的に操作する
ことにより走行状態と停止状態に切り換えること
ができる。また、前後進切換用弁３４を上記と同
様に操作してサーボ３５を作動させると、メーン
ポンプ２９の吐出口を切り換えて前進、後進を任
意に選択したり、吐出量を変化させて走行速度を
調整することができる。またポンプ２９と分流器
３０との間に第１駆動切換用電磁弁３６を、前輪
用駆動機構１１の戻り回路側に第２駆動切換用電
磁弁３７を各々設け、各弁３６，３７の作用によ
り後輪３のみを駆動する二輪駆動と、前輪２及び
後輪３を駆動する四輪駆動とに切り換え可能にし
てある。 In the embodiment shown in FIG. 6, a solenoid valve 33 for switching between running and stopping, a valve 34 for switching forward and backward, etc. are provided in the discharge side circuit of a charge pump 32 that pumps the working fluid from a tank 31. Therefore, by remotely operating the running/stopping switching solenoid valve 33 from the driver's seat, it is possible to switch between the running state and the stopped state. In addition, when the forward/reverse switching valve 34 is operated in the same manner as described above to activate the servo 35, the discharge port of the main pump 29 can be switched to arbitrarily select forward or reverse, or the discharge amount can be changed to speed up the travel. can be adjusted. Further, a first drive switching solenoid valve 36 is provided between the pump 29 and the flow divider 30, and a second drive switching solenoid valve 37 is provided on the return circuit side of the front wheel drive mechanism 11. This makes it possible to switch between two-wheel drive, which drives only the rear wheels 3, and four-wheel drive, which drives the front wheels 2 and rear wheels 3.
アスフアルトフイニツシヤを舗装現場まで移動
するときなどは、充分な推進力を得られるので、
伝達力損失の少ない二輪駆動で充分であり、この
二輪駆動に切り換えると前輪駆動機構１１に供給
していた分の作動液をも後輪駆動機構１９に集中
的に供給できるので四輪駆動の場合よりも効率良
く速く走行できる。 When moving the asphalt finisher to the paving site, you can obtain sufficient propulsion power.
Two-wheel drive with little transmission power loss is sufficient, and when switching to two-wheel drive, the hydraulic fluid that was being supplied to the front-wheel drive mechanism 11 can also be intensively supplied to the rear-wheel drive mechanism 19, so in the case of four-wheel drive. You can run faster and more efficiently.
二輪駆動により前進するときは、メーンポンプ
２９の第１吐出口から吐出された作動液が第１流
路３８を通つて電磁弁３６に入る。この電磁弁３
６は、二輪駆動時においては、第６図に示すよう
に、第１流路３８と第２流路３９とを連通してい
る。したがつてポンプ２９から送り出された作動
液は、第２流路３９を通つて後輪用駆動機構１９
の液圧モータ２０の第１ポートに供給される。第
１ポートに作動液が供給されると、液圧モータ２
０が正転方向に作動して後輪３を前進方向に回転
駆動する。そして液圧モータ２０から流出した作
動液は、第３流路４０を通つてポンプ２９に戻
る。したがつてアスフアルトフイニツシヤは、後
輪３の駆動力により前進する。なお上記した二輪
駆動状態においては、前輪用駆動機構１１の流路
が閉回路を形成して作動液が閉回路内を循環可能
な状態になるので、左右の前輪２，２は、アスフ
アルトフイニツシヤの前進に従つて路面の抵抗に
より回転する。 When moving forward by two-wheel drive, the hydraulic fluid discharged from the first discharge port of the main pump 29 enters the solenoid valve 36 through the first flow path 38. This solenoid valve 3
6 communicates the first flow path 38 and the second flow path 39 as shown in FIG. 6 during two-wheel drive. Therefore, the hydraulic fluid sent out from the pump 29 passes through the second flow path 39 to the rear wheel drive mechanism 19.
is supplied to the first port of the hydraulic motor 20. When hydraulic fluid is supplied to the first port, the hydraulic motor 2
0 operates in the normal rotation direction to rotationally drive the rear wheel 3 in the forward direction. The hydraulic fluid flowing out from the hydraulic motor 20 then returns to the pump 29 through the third flow path 40. Therefore, the asphalt finisher moves forward by the driving force of the rear wheels 3. In the two-wheel drive state described above, the flow path of the front wheel drive mechanism 11 forms a closed circuit and the hydraulic fluid can circulate within the closed circuit, so the left and right front wheels 2, 2 are connected to the asphalt finisher. As it moves forward, it rotates due to the resistance of the road surface.
そして後進する場合に、前後進切換用電磁弁３
４を後進側に操作し、ポンプ２９の吐出口を第２
吐出口に切り換える。ポンプ２９の第２吐出口か
ら吐出した作動液は、第３流路４０を通つて後輪
用駆動機構１９の液圧モータ２０の第２ポートに
供給される。したがつて液圧モータ２０は逆転作
動し、後輪３，３を後進方向に回転駆動する。 And when going backwards, the solenoid valve 3 for forward/backward switching
4 to the reverse side, and set the discharge port of the pump 29 to the second position.
Switch to the discharge port. The hydraulic fluid discharged from the second discharge port of the pump 29 is supplied to the second port of the hydraulic motor 20 of the rear wheel drive mechanism 19 through the third flow path 40 . Therefore, the hydraulic motor 20 operates in reverse, rotating the rear wheels 3, 3 in the backward direction.
アスフアルト合材を敷設するときは、大きな駆
動力や強い推進力を必要とするので、四輪駆動に
切り換える。四輪駆動に切り換えるには、運転席
に設けた切換操作部（図示せず）を操作すること
により第１、第２駆動切換用電磁弁３６，３７な
どを切り換える。第１駆動切換用電磁弁３６を切
り換えると、ポンプ２９からの第１流路３８と分
流器３０の流入側の第４流路４１とが連通し、分
流器３０の一方の流出側の第５流路４２と後輪用
駆動機構１９の第２流路３９とが連通する。した
がつてポンプ２９の第１吐出口から吐出した作動
液は、第１流路３８から第４流路４１を通つて分
流器３０に流入する。第６図に示す分流器３０
は、作動液を後輪用駆動機構１９と前輪用駆動機
構１１とに約８対１の割合で分流するように設定
してある。したがつてポンプ２９から送られた作
動液は、その流量の約９分の８が第５流路４２
に、約９分の１が第６流路４３に夫々送出され
る。第５流路４２に送出された作動液は、第１駆
動切換用電磁弁３６を介して第２流路３９を通
り、後輪用駆動機構１９の液圧モータ２０の第１
ポートに供給される。第１ポートに作動液が供給
されると、液圧モータ２０が正転方向に作動して
後輪３を前進方向に回転駆動する。そして液圧モ
ータ２０から流出した作動液は第３流路４０を通
つてポンプ２９に戻る。 When laying asphalt mixture, large driving force and strong propulsive force are required, so switch to four-wheel drive. To switch to four-wheel drive, the first and second drive switching solenoid valves 36, 37, etc. are switched by operating a switching operation section (not shown) provided at the driver's seat. When the first drive switching solenoid valve 36 is switched, the first flow path 38 from the pump 29 and the fourth flow path 41 on the inflow side of the flow divider 30 communicate with each other, and the fifth flow path 41 on the outflow side of one of the flow dividers 30 communicates with each other. The flow path 42 and the second flow path 39 of the rear wheel drive mechanism 19 communicate with each other. Therefore, the working fluid discharged from the first outlet of the pump 29 flows from the first flow path 38 through the fourth flow path 41 into the flow divider 30 . Flow divider 30 shown in FIG.
is set so that the hydraulic fluid is divided into the rear wheel drive mechanism 19 and the front wheel drive mechanism 11 at a ratio of about 8:1. Therefore, approximately eight-ninths of the flow rate of the hydraulic fluid sent from the pump 29 flows through the fifth flow path 42.
Approximately one-ninth of the liquid is sent to the sixth flow path 43, respectively. The hydraulic fluid sent to the fifth flow path 42 passes through the second flow path 39 via the first drive switching solenoid valve 36, and then passes through the second flow path 39 to the first
supplied to the port. When the hydraulic fluid is supplied to the first port, the hydraulic motor 20 operates in the normal rotation direction to rotationally drive the rear wheel 3 in the forward direction. The hydraulic fluid flowing out from the hydraulic motor 20 returns to the pump 29 through the third flow path 40.
一方、分流器３０から第６流路４３に送出され
た作動液は、途中で分岐する第７流路４４と第８
流路４５とに分流し、第７流路４４を通つた作動
液が左側の前輪用駆動機構１１の液圧モータ１６
に、第８流路４５を通つた作動液が右側の前輪用
駆動機構１１の液圧モータ１６に供給される。左
右の前輪２，２が正常に接地している状態におい
ては、左右の走行抵抗、即ち背圧が等しいので、
左右の液圧モータ１６，１６には同じ量の作動液
が供給される。したがつて左右の前輪２，２は、
同じ駆動力でアスフアルトフイニツシヤを推進す
る。そして左右の前輪２のいずれか一方がスリツ
プすると、スリツプした車輪の駆動機構が一瞬無
負荷状態となり、第６流路４３からの作動液が殆
どこの無負荷の駆動機構に流入し、当該前輪２を
空転させる。この状態では他方の駆動機構に作動
液が供給されなくなるので、当該前輪２の駆動力
が失われる。即ち、一方の前輪２がスリツプする
と、左右の前輪２，２の駆動力は失われる。しか
し前輪２，２の駆動力がなくなつても、分流器３
０からの作動液が継続して後輪用駆動機構１９に
前輪用駆動機構１１よりも多く供給されるので、
アスフアルトフイニツシヤは後輪３の強力な駆動
力により前進する。即ち、アスフアルトフイニツ
シヤは、路面の影響を受け易い前輪２がスリツプ
したり或は障害物を乗り越えても後輪３の強力な
駆動力により走行方向を乱すことなく円滑且つ確
実に走行する。 On the other hand, the hydraulic fluid sent from the flow divider 30 to the sixth flow path 43 is divided into the seventh flow path 44 and the eighth flow path, which are branched in the middle.
The hydraulic fluid that has passed through the seventh flow path 44 is supplied to the hydraulic motor 16 of the left front wheel drive mechanism 11.
Then, the hydraulic fluid that has passed through the eighth flow path 45 is supplied to the hydraulic motor 16 of the right front wheel drive mechanism 11. When the left and right front wheels 2, 2 are in normal contact with the ground, the left and right running resistance, that is, the back pressure, is equal, so
The same amount of hydraulic fluid is supplied to the left and right hydraulic motors 16, 16. Therefore, the left and right front wheels 2,2 are
The same driving force propels the asphalt finisher. When one of the left and right front wheels 2 slips, the drive mechanism of the slipped wheel momentarily becomes unloaded, and most of the hydraulic fluid from the sixth flow path 43 flows into this unloaded drive mechanism, causing the front wheel 2 to slip. to idle. In this state, hydraulic fluid is no longer supplied to the other drive mechanism, so the driving force for the front wheel 2 is lost. That is, if one of the front wheels 2 slips, the driving force of the left and right front wheels 2 is lost. However, even if the driving force of the front wheels 2, 2 is lost, the flow diverter 3
Since the hydraulic fluid from 0 is continuously supplied to the rear wheel drive mechanism 19 more than the front wheel drive mechanism 11,
The asphalt finisher moves forward due to the strong driving force of the rear wheels 3. That is, the asphalt finisher runs smoothly and reliably without disturbing the running direction due to the strong driving force of the rear wheels 3 even if the front wheels 2, which are easily affected by the road surface, slip or run over an obstacle.
そして左右の液圧モータ１６，１６から流出し
た作動液は、合流して第９流路４６を通り、第２
駆動切換用電磁弁３７を介して第３流路４０に流
入し、ポンプ２９に戻る。 Then, the hydraulic fluid flowing out from the left and right hydraulic motors 16, 16 joins together, passes through the ninth flow path 46, and passes through the second flow path 46.
It flows into the third flow path 40 via the drive switching solenoid valve 37 and returns to the pump 29.
なお、後輪３の一方がスリツプし、差動機２３
の作用により他方の後輪３の推進力が失われた場
合、アスフアルトフイニツシヤは、左右の前輪
２，２の推進力によつて、走行を乱すことなく円
滑に且つ確実に進行する。 Note that one of the rear wheels 3 may slip, causing the differential 23 to
If the propulsive force of the other rear wheel 3 is lost due to the action of the above, the asphalt finish will proceed smoothly and reliably without disturbing the running due to the propulsive force of the left and right front wheels 2, 2.
なお上記した作動液の回路は一実施例であり、
分流器３０により分流した作動液を前輪用駆動機
構１１の液圧モータ１６と、後輪用駆動機構１９
の液圧モータ２０とに供給することができればど
のような構成でもよい
また、前輪用駆動機構１１は、第７図に示すよ
うに、ブラケツト１０に液圧モータ１６の本体を
固定し、該液圧モータ１６の出力軸をクラツチ４
７を介して減速機４８に接続し、該減速機４８の
出力側に前輪２のホイール２′を止着してもよい。
この様にすると、後輪３だけを駆動して走行する
場合に、クラツチ４７をオフして液圧モータ１６
と前輪２との接続を断ち、前輪２の回転抵抗を低
減することができる。 Note that the hydraulic fluid circuit described above is one example.
The hydraulic fluid divided by the flow divider 30 is transferred to the hydraulic motor 16 of the front wheel drive mechanism 11 and the rear wheel drive mechanism 19.
Any configuration may be used as long as the front wheel drive mechanism 11 can supply the hydraulic motor 20 to the hydraulic motor 20.As shown in FIG. Clutch 4 the output shaft of pressure motor 16.
The front wheel 2 may be connected to a speed reducer 48 via the speed reducer 7, and the wheel 2' of the front wheel 2 may be fixed to the output side of the speed reducer 48.
By doing this, when driving only the rear wheels 3, the clutch 47 is turned off and the hydraulic motor 16 is turned off.
The rotational resistance of the front wheel 2 can be reduced by cutting off the connection between the front wheel 2 and the front wheel 2.
以上説明したように本発明によれば、ポンプか
ら圧送される作動液を分流器を介して前輪用駆動
機構の液圧モータ及び後輪用駆動機構の液圧モー
タに供給する状態と、ポンプから圧送される作動
液を分流器に供給することなく後輪用駆動機構の
液圧モータに供給する状態とに切り換え可能な駆
動切換弁を備えているので、この駆動切換弁を切
り換えることにより後輪だけの二輪駆動と前輪及
び後輪を駆動する四輪駆動とに切り換えることが
できる。 As explained above, according to the present invention, the hydraulic fluid pumped from the pump is supplied to the hydraulic motor of the front wheel drive mechanism and the hydraulic motor of the rear wheel drive mechanism via the flow divider, and It is equipped with a drive switching valve that can switch between supplying the hydraulic fluid under pressure to the hydraulic motor of the rear wheel drive mechanism without supplying it to the flow divider. It can be switched between two-wheel drive, which drives only the front wheels, and four-wheel drive, which drives the front and rear wheels.
四輪駆動が切り換えた場合、本願発明はポンプ
から圧送される作動液を前輪用駆動機構の液圧モ
ータよりも後輪用駆動機構の液圧モータに多く供
給する分流器を備えているので、四輪駆動時にお
ける後輪の駆動力を前輪の駆動力よりも強くする
ことができ、後輪よりも輪荷重の変化が大きく、
しかも走行路面の影響を受け易い前輪が乳剤等に
よりスリツプしたり或いは障害物を載り越えたり
しても方向性が乱され難く、優れた直進安定性を
得ることができる。したがつて、乳剤等を散布し
て摩擦係数が低くなつた路面であつても予定通り
の方向にアスフアルト合材を敷設することができ
る。また、四輪駆動にすると後輪が走行路面の影
響を受けた場合には前輪の駆動力により前進させ
ることができるので、敷設作業時に緩速走行で大
きな推進力を確保することができる。したがつ
て、車体を軽量化することができ、舗装の下地部
分の損傷を減少させることができる。 When four-wheel drive is switched, the present invention is equipped with a flow divider that supplies more hydraulic fluid from the pump to the hydraulic motor of the rear wheel drive mechanism than to the hydraulic motor of the front wheel drive mechanism. During four-wheel drive, the rear wheel drive force can be made stronger than the front wheel drive force, and the change in wheel load is greater than that of the rear wheels.
Moreover, even if the front wheels, which are easily affected by the road surface, slip due to emulsion or run over an obstacle, the directionality is not easily disturbed, and excellent straight-line stability can be obtained. Therefore, the asphalt mixture can be laid in the planned direction even on a road surface where the coefficient of friction has been lowered by dispersing emulsion or the like. In addition, with four-wheel drive, if the rear wheels are affected by the road surface, the front wheels can move forward using the driving force of the front wheels, so it is possible to secure a large propulsion force while driving at a slow speed during laying work. Therefore, the weight of the vehicle body can be reduced, and damage to the pavement base can be reduced.
一方、駆動切換弁を切り換えることにより二輪
駆動にすると、ポンプが吐出する作動液の全量で
後輪を駆動するので、四輪駆動の場合よりも速い
走行速度を得ることができ、且つ作動液を介して
伝達する力の損失を四輪駆動状態よりも減少させ
ることができるので、舗装現場まで移動するとき
など緩速走行する必要がない場合においては、効
率の良い高速走行ができる。 On the other hand, if you switch the drive selector valve to two-wheel drive, the rear wheels are driven with the entire amount of hydraulic fluid discharged by the pump, so you can achieve faster travel speed than with four-wheel drive, and you can also use hydraulic fluid to drive the rear wheels. Since the loss of power transmitted through the vehicle can be reduced compared to the four-wheel drive state, efficient high-speed travel is possible when there is no need to travel at a slow speed, such as when traveling to a paving site.
図面は本発明の実施例を示すもので、第１図は
斜示図、第２図は正面図、第３図は前輪用駆動機
構の平面図、第４図は前輪用駆動機構の正面図、
第５図はポンプと液圧モータの概略接続図、第６
図は作動液の回路図、第７図は前輪用駆動機構の
他の実施例の正面図である。
１は車体、２は前輪、３は後輪、４は貯留部、
５は敷設機、６は搬送機、１１は前輪用駆動機
構、１６，２０は液圧モータ、２８はエンジン、
２９はポンプ、３０は分流器である。
The drawings show an embodiment of the present invention; FIG. 1 is a perspective view, FIG. 2 is a front view, FIG. 3 is a plan view of the front wheel drive mechanism, and FIG. 4 is a front view of the front wheel drive mechanism. ,
Figure 5 is a schematic connection diagram of the pump and hydraulic motor, Figure 6
The figure is a circuit diagram of the hydraulic fluid, and FIG. 7 is a front view of another embodiment of the front wheel drive mechanism. 1 is the vehicle body, 2 is the front wheel, 3 is the rear wheel, 4 is the storage part,
5 is a laying machine, 6 is a conveyor, 11 is a front wheel drive mechanism, 16 and 20 are hydraulic motors, 28 is an engine,
29 is a pump, and 30 is a flow divider.
Claims (1)
に、アスフアルト合材を敷設する敷設機構を備え
たアスフアルトフイニツシヤにおいて、 左右の前輪に個々に取り付けられ、液圧モータ
を駆動源とする前輪用駆動機構と、 後輪に取り付けられ、液圧モータを駆動源とす
る減速機付き後輪用駆動機構と、 ポンプから圧送される作動液を前輪用駆動機構
の液圧モータよりも後輪用駆動機構の液圧モータ
に多く供給する分流器と、 ポンプから圧送される作動液を分流器を介して
上記前輪用駆動機構の液圧モータ及び後輪用駆動
機構の液圧モータに供給する状態と、ポンプから
圧送される作動液を分流器に供給することなく後
輪用駆動機構の液圧モータに供給する状態とに切
り換え可能な駆動切換弁と、 を備え、アスフアルト合材を敷設する作業時には
前輪及び後輪を駆動して緩速で走行し、非作業時
には後輪のみを駆動して作業時よりも高速で走行
可能にしたことを特徴とするアスフアルトフイニ
ツシヤ。[Scope of Claims] 1. In an asphalt finisher equipped with a laying mechanism for laying asphalt composite material on a vehicle body supported by left and right front wheels and rear wheels, an asphalt finisher is installed on each of the left and right front wheels and has a hydraulic motor. A front wheel drive mechanism serves as a drive source; a rear wheel drive mechanism with a reducer attached to the rear wheel uses a hydraulic motor as a drive source; and a hydraulic motor of the front wheel drive mechanism that uses hydraulic fluid pumped from a pump. A flow divider that supplies a larger amount of hydraulic fluid to the hydraulic motor of the rear wheel drive mechanism than the hydraulic pressure motor of the front wheel drive mechanism and a hydraulic pressure of the rear wheel drive mechanism. A drive switching valve that can switch between supplying the hydraulic fluid to the motor and supplying the hydraulic fluid pressure-fed from the pump to the hydraulic motor of the rear wheel drive mechanism without supplying it to the flow divider. This asphalt finisher is characterized by driving the front wheels and rear wheels to run at a slow speed when working to lay materials, and driving only the rear wheels when not working so that the machine can run at a higher speed than when working.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15323884A JPS6131506A (en) | 1984-07-25 | 1984-07-25 | Asphalt finisher |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15323884A JPS6131506A (en) | 1984-07-25 | 1984-07-25 | Asphalt finisher |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6131506A JPS6131506A (en) | 1986-02-14 |
| JPH0154483B2 true JPH0154483B2 (en) | 1989-11-20 |
Family
ID=15558073
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15323884A Granted JPS6131506A (en) | 1984-07-25 | 1984-07-25 | Asphalt finisher |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6131506A (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH045546Y2 (en) * | 1987-12-18 | 1992-02-17 | ||
| JPH0634405Y2 (en) * | 1988-05-30 | 1994-09-07 | 株式会社新潟鐵工所 | Drives for paved vehicles |
| JPH0211814U (en) * | 1988-07-05 | 1990-01-25 | ||
| JP4688828B2 (en) * | 2007-02-20 | 2011-05-25 | 住友建機株式会社 | Paving machine |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5848697A (en) * | 1981-09-18 | 1983-03-22 | Kansai Paint Co Ltd | Preventing method for corrosion of cationic electrodeposition painting apparatus |
| JPS59153238A (en) * | 1983-02-21 | 1984-09-01 | Nec Corp | Voice input/output system |
-
1984
- 1984-07-25 JP JP15323884A patent/JPS6131506A/en active Granted
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5848697A (en) * | 1981-09-18 | 1983-03-22 | Kansai Paint Co Ltd | Preventing method for corrosion of cationic electrodeposition painting apparatus |
| JPS59153238A (en) * | 1983-02-21 | 1984-09-01 | Nec Corp | Voice input/output system |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6131506A (en) | 1986-02-14 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |