JPH04993Y2 - - Google Patents
Info
- Publication number
- JPH04993Y2 JPH04993Y2 JP12161886U JP12161886U JPH04993Y2 JP H04993 Y2 JPH04993 Y2 JP H04993Y2 JP 12161886 U JP12161886 U JP 12161886U JP 12161886 U JP12161886 U JP 12161886U JP H04993 Y2 JPH04993 Y2 JP H04993Y2
- Authority
- JP
- Japan
- Prior art keywords
- double
- dumping
- port
- switching valve
- cylinder
- 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
- 230000003028 elevating effect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
Landscapes
- Fluid-Pressure Circuits (AREA)
- Loading Or Unloading Of Vehicles (AREA)
Description
【考案の詳細な説明】
産業上の利用分野
本考案は、荷台を車体フレームに対して昇降し
たりダンプしたりするハイリフト・ダンプ運搬車
に関する。[Detailed Description of the Invention] Industrial Application Field The present invention relates to a high-lift dump truck that lifts and lowers a cargo platform relative to a body frame and dumps the cargo.
従来技術
ハイリフト・ダンプ運搬車は、実開昭53−
17013号公報や実開昭59−121253号公報等に記載
されている。Conventional technology High-lift dump truck was developed in 1973.
It is described in Publication No. 17013, Japanese Utility Model Application Publication No. 59-121253, etc.
このようなハイリフトダンプ車は、第２図の如
く、一般的に荷台１を車体フレーム２に対して昇
降させる昇降用油圧シリンダ３と荷台１をダンプ
させるダンプ用油圧シリンダ４とを具備してい
て、その油圧配管は、第３図の如く配管してい
る。すなわち、油圧ポンプ１８から出る圧油の配
管途中に、昇降用油圧シリンダ３とダンプ用油圧
シリンダ４のそれぞれに対して圧油の送り方向を
切り換える２個の４ポート切換弁１４，１５を設
けて、それぞれの切換弁１４，１５を操作するこ
とで荷台を昇降させたりダンプさせたりするよう
にしている。 As shown in FIG. 2, such a high-lift dump truck generally includes a lifting hydraulic cylinder 3 for raising and lowering the loading platform 1 relative to the vehicle body frame 2, and a dumping hydraulic cylinder 4 for dumping the loading platform 1. The hydraulic piping is arranged as shown in Fig. 3. That is, two 4-port switching valves 14 and 15 are provided in the piping for the pressure oil coming out of the hydraulic pump 18 to switch the feeding direction of the pressure oil to the lifting hydraulic cylinder 3 and the dumping hydraulic cylinder 4, respectively. By operating respective switching valves 14 and 15, the loading platform is raised and lowered and dumped.
考案が解決しようとする問題点
従来のハイリフト・ダンプ運搬車の油圧配管構
造では、前記の如く、昇降用油圧シリンダ３とダ
ンプ用油圧シリンダ４とを複動型の油圧シリンダ
とした場合には、４ポート切換弁１４，１５から
それぞれ２本の配管が必要となるが、この種ハイ
リフト・ダンプ運搬車は、一般的に小型であるた
め、合計４本の油圧ポンプを荷台１と車体フレー
ム２との間に配管するのが困難である。Problems to be Solved by the Invention In the conventional hydraulic piping structure of a high-lift dump truck, when the lifting hydraulic cylinder 3 and the dumping hydraulic cylinder 4 are double-acting hydraulic cylinders, as described above, Two pipes are required from each of the four-port switching valves 14 and 15, but since this type of high-lift dump truck is generally small, a total of four hydraulic pumps are installed between the loading platform 1 and the body frame 2. It is difficult to pipe between the two.
そこで、本考案では、配管する油圧パイプの数
を少なくして、配管を容易にすると共に生産コス
トを低減しようとするものである。 Therefore, in the present invention, the number of hydraulic pipes to be installed is reduced to facilitate piping and reduce production costs.
問題点を解決するための手段
そこで、本考案では、荷台１を車体フレーム２
に対して昇降させる昇降用複動シリンダ３と、荷
台１をダンプさせるダンプ用複動シリンダ４とを
設けてなるハイリフト・ダンプ運搬車において、
４ポート切換弁５に連結した一方の管路６を前記
昇降用複動シリンダ３とダンプ用複動シリンダ４
の荷台側ポート７，８へ直列に連結し、他方の管
路９を昇降用複動シリンダ３とダンプ用複動シリ
ンダ４の車体フレーム側ポート１０，１１とへそ
れぞれ連結した３ポート切換弁１２に連結して構
成した。Means for Solving the Problems Therefore, in the present invention, the loading platform 1 is replaced by the vehicle body frame 2.
In a high-lift dump truck, which is provided with a double-action cylinder 3 for lifting and lowering the cargo platform 1, and a double-action cylinder 4 for dumping that dumps the cargo platform 1,
One pipe line 6 connected to the 4-port switching valve 5 is connected to the double-acting cylinder 3 for lifting and the double-acting cylinder 4 for dumping.
A three-port switching valve 12 is connected in series to the loading platform side ports 7 and 8 of the 3-port switching valve 12, and the other pipe line 9 is connected to the vehicle body frame side ports 10 and 11 of the double-acting cylinder 3 for lifting and the double-acting cylinder 4 for dumping, respectively. It was constructed by connecting.
考案の作用及び効果
４ポート切換弁５の一方の管路６は、昇降用複
動シリンダ３とダンプ用複動シリンダ４の荷台側
ポート７，８へ直列に連結し、これらシリンダ
３，４の車体フレーム側ポート１０，１１とは３
ポート切換弁１２に連結しているので、配管が簡
略であるが、４ポート切換弁５を両シリンダ３，
４と直列に連結した管路６から圧油を戻すように
切り換えて、３ポート切換弁１２を昇降用複動シ
リンダ３あるいはダンプ用複動シリンダ４側へ圧
油を送るように切り換えることで、荷台１が車体
フレーム２に対して上昇したりダンプしたりす
る。Function and effect of the invention One pipe line 6 of the 4-port switching valve 5 is connected in series to the loading platform side ports 7 and 8 of the double-acting cylinder 3 for lifting and the double-acting cylinder 4 for dumping. What are the body frame side ports 10 and 11?3
Since it is connected to the port switching valve 12, the piping is simple, but the 4-port switching valve 5 is connected to both cylinders 3,
By switching to return the pressure oil from the pipe line 6 connected in series with 4, and switching the 3-port switching valve 12 to send pressure oil to the double-acting cylinder 3 for lifting or the double-acting cylinder 4 for dumping, A loading platform 1 rises or dumps relative to a vehicle body frame 2.
又、４ポート切換弁５を該管路６へ圧油を送る
ように切り換えて、三方切換弁１２を昇降用複動
シリンダ３あるいはダンプ用複動シリンダ４から
圧油を戻すように切り換えることで、荷台１が降
下したりダンプ降下したりすることになる。 Also, by switching the 4-port switching valve 5 to send pressure oil to the pipe line 6 and switching the 3-way switching valve 12 to return pressure oil from the double-acting cylinder 3 for lifting or the double-acting cylinder 4 for dumping. , the loading platform 1 will be lowered or dumped.
つまり、４方切換弁５を一旦一方へ切り換えれ
ば、３方切換弁１２の操作で荷台１が上昇した
り、ダンプしたり、あるいは、荷台１が降下した
りダンプ降下したりとの、上昇あるいは降下に限
定されるため、操作が単純で誤操作の恐れが少な
くなる。 In other words, once the 4-way switching valve 5 is switched to one side, the loading platform 1 can be raised or dumped by operating the 3-way switching valve 12, or the loading platform 1 can be lowered or dumped. Alternatively, since it is limited to descent, the operation is simple and there is less risk of erroneous operation.
実施例
次に、本考案の実施例を図面を参照しながら説
明する。Embodiments Next, embodiments of the present invention will be described with reference to the drawings.
ハイリフト・ダンプ運搬車の構造は、第２図に
示す如く、クローラ１４等からなる走行装置を具
備した車台フレーム２に、左右両側部においてＸ
型に枢支したクロスリンク１５を介して昇降フレ
ーム１６を装架し、さらに、この昇降フレーム１
６に荷台１を枢着している。クロスリンク１５は
昇降用複動シリンダ３で伸縮させ、荷台１はダン
プ用複動シリンダ４でダンプ作動させるようにし
ている。 As shown in Fig. 2, the structure of the high-lift dump truck is a chassis frame 2 equipped with a traveling device consisting of crawlers 14, etc.
An elevating frame 16 is mounted via a cross link 15 pivoted to the mold, and the elevating frame 1
The loading platform 1 is pivotally connected to 6. The cross link 15 is extended and contracted by a double-acting cylinder 3 for lifting and lowering, and the loading platform 1 is operated for dumping by a double-acting cylinder 4 for dumping.
１７は原動機、１８は油圧ポンプ、１９は操縦
用のレバーである。 17 is a prime mover, 18 is a hydraulic pump, and 19 is a control lever.
昇降用複動シリンダ３とダンプ用複動シリンダ
４とは、第１図の如く油圧配管を行つている。 The double-acting cylinder 3 for lifting and the double-acting cylinder 4 for dumping are connected with hydraulic piping as shown in FIG.
油圧ポンプ１８から吐き出される圧油を送る管
路２０は、まず４ポート３位置切換弁５に連結
し、さらにこの４ポート３位置切換弁５に連結し
た管路６，９の内、一方の管路６をダンプ用複動
シリンダ４の荷台側ポート８に連結し、さらに、
このダンプ用複動シリンダ４の別の荷台側ポート
２１から管路２２で昇降用複動シリンダ３の荷台
側ポート７へ連結している。４ポート３位置切換
弁５から出る別の管路９には、３ポート３位置切
換弁１２を連結し、、この３ポート３位置切換弁
１２から出た一方の管路２３を昇降用複動シリン
ダ３の車体フレーム側ポート１０に連結し、他方
の管路２４をダンプ用複動シリンダ４の昇降フレ
ーム側ポート１１に連結している。 A pipe line 20 for sending pressure oil discharged from the hydraulic pump 18 is first connected to the 4-port 3-position switching valve 5, and then one of the pipes 6 and 9 connected to the 4-port 3-position switching valve 5. The passage 6 is connected to the loading platform side port 8 of the double-acting dump cylinder 4, and further,
Another loading platform side port 21 of this double acting cylinder 4 for dumping is connected to the loading platform side port 7 of the double acting cylinder 3 for lifting by a conduit 22. A 3-port 3-position switching valve 12 is connected to another pipe line 9 that exits from the 4-port 3-position switching valve 5, and one pipe line 23 that exits from this 3-port 3-position switching valve 12 is connected to a double-acting lift valve. It is connected to the vehicle body frame side port 10 of the cylinder 3, and the other pipe line 24 is connected to the elevating frame side port 11 of the double-acting dump cylinder 4.
４ポート３位置切換弁５と３ポート３位置切換
弁１２とは、共にスプリングでクローズトセンタ
に保持され、レバーの操作で圧油の流れ方向を変
えるようにしている。 Both the 4-port 3-position switching valve 5 and the 3-port 3-position switching valve 12 are held in a closed center by a spring, and the flow direction of the pressure oil can be changed by operating a lever.
２５はリリーフ弁、２６はドレンである。 25 is a relief valve, and 26 is a drain.
４ポート３位置切換弁５をＡ位置に切り換えた
状態で、３ポート３位置切換弁１２をＣ位置に切
り換えると、ダンプ用複動シリンダ４が伸長して
荷台１をダンプさせ、３ポート３位置切換弁１２
をＤ位置にすると、昇降用複動シリンダ３が伸長
して荷台１を上昇させる。 When the 3-port 3-position switching valve 12 is switched to the C position with the 4-port 3-position switching valve 5 switched to the A position, the dumping double-acting cylinder 4 extends to dump the loading platform 1, and the 3-port 3-position switching valve 12 is switched to the C position. Switching valve 12
When it is set to the D position, the double-acting cylinder 3 for raising and lowering extends and raises the loading platform 1.
又、４ポート３位置切換弁５をＢ位置に切り換
えた状態で、３ポート３位置切換弁１２をＣ位置
にするとダンプ用複動シリンダ４が縮み荷台１が
ダンプ状態から昇降フレーム１６上へ復帰し、該
切換弁１２をＤ位置にすると昇降用複動シリンダ
３が縮み荷台１が降下することになる。 Furthermore, when the 4-port 3-position switching valve 5 is switched to the B position and the 3-port 3-position switching valve 12 is set to the C position, the dumping double-acting cylinder 4 is retracted and the loading platform 1 returns from the dumping state to the lifting frame 16. However, when the switching valve 12 is set to the D position, the double-acting lifting cylinder 3 is retracted and the loading platform 1 is lowered.
第１図は本考案の一実施例を示す油圧回路図、
第２図は従来のハイリフト・ダンプ運搬車を示す
側面図、第３図は従来技術の油圧回路図である。
１……荷台、２……車体フレーム、３……昇降
用複動シリンダ、４……ダンプ用複動シリンダ、
５……４ポート切換弁、６，９……管路、７，８
……荷台側ポート、１０，１１……車体フレーム
側ポート、１２……３ポート切換弁。
FIG. 1 is a hydraulic circuit diagram showing an embodiment of the present invention;
FIG. 2 is a side view of a conventional high-lift dump truck, and FIG. 3 is a hydraulic circuit diagram of the prior art. 1... Loading platform, 2... Vehicle body frame, 3... Double-acting cylinder for lifting, 4... Double-acting cylinder for dumping,
5... 4 port switching valve, 6, 9... Pipe line, 7, 8
...Cargo bed side port, 10, 11...Vehicle frame side port, 12...3 port switching valve.
Claims (1)
降用複動シリンダ３と、荷台１をダンプさせるダ
ンプ用複動シリンダ４とを設けてなるハイリフ
ト・ダンプ運搬車において、４ポート切換弁５に
連結した一方の管路６を前記昇降用複動シリンダ
３とダンプ用複動シリンダ４の荷台側ポート７，
８へ直列に連結し、他方の管路９を昇降用複動シ
リンダ３とダンプ用複動シリンダ４の車体フレー
ム側ポート１０，１１とへそれぞれ連結した３ポ
ート切換弁１２に連結してなるハイリフトダンプ
運搬車の油圧配管構造。 In a high-lift dump transport vehicle equipped with a double-acting lifting cylinder 3 for raising and lowering a loading platform 1 relative to a vehicle body frame 2 and a double-acting dumping cylinder 4 for dumping the loading platform 1, the present invention is connected to a 4-port switching valve 5. One pipe line 6 is connected to the loading platform side port 7 of the double-acting cylinder 3 for lifting and the double-acting cylinder 4 for dumping.
8 in series, and the other pipe line 9 is connected to a 3-port switching valve 12 that is connected to the vehicle frame side ports 10 and 11 of the double-acting cylinder 3 for lifting and the double-acting cylinder 4 for dumping, respectively. Hydraulic piping structure for dump truck.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12161886U JPH04993Y2 (en) | 1986-08-07 | 1986-08-07 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12161886U JPH04993Y2 (en) | 1986-08-07 | 1986-08-07 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6328044U JPS6328044U (en) | 1988-02-24 |
| JPH04993Y2 true JPH04993Y2 (en) | 1992-01-14 |
Family
ID=31011061
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12161886U Expired JPH04993Y2 (en) | 1986-08-07 | 1986-08-07 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH04993Y2 (en) |
-
1986
- 1986-08-07 JP JP12161886U patent/JPH04993Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6328044U (en) | 1988-02-24 |
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