JPH0434647Y2 - - Google Patents
Info
- Publication number
- JPH0434647Y2 JPH0434647Y2 JP1983083606U JP8360683U JPH0434647Y2 JP H0434647 Y2 JPH0434647 Y2 JP H0434647Y2 JP 1983083606 U JP1983083606 U JP 1983083606U JP 8360683 U JP8360683 U JP 8360683U JP H0434647 Y2 JPH0434647 Y2 JP H0434647Y2
- Authority
- JP
- Japan
- Prior art keywords
- piston
- hydraulic cylinder
- throttle valve
- variable throttle
- machine
- 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
Landscapes
- Transplanting Machines (AREA)
- Lifting Devices For Agricultural Implements (AREA)
- Harvester Elements (AREA)
Description
【考案の詳細な説明】
本考案はコンバインの前処理装置、トラクタに
装着した耕耘装置その他の作業機又は乗用田植機
の機体に装着した植付装置等、走行装置を有する
機体に対して作業機を油圧シリンダーで昇降させ
るようにした走行作業機において、地面に対する
作業機の高さを自動的に調節する装置に関する。[Detailed description of the invention] The present invention is a work machine for machines with a traveling device, such as a pre-treatment device of a combine harvester, a tilling device or other work machine attached to a tractor, or a planting device attached to the body of a riding rice transplanter. The present invention relates to a device for automatically adjusting the height of a traveling work machine relative to the ground in a traveling work machine that is raised and lowered by a hydraulic cylinder.
従来、前述のような作業機を油圧シリンダーに
より走行装置を有する機体に対して自動的に昇降
させる装置は、高さ検出器の検出信号により電磁
弁を制御し、それにより油圧シリンダーを作動さ
せて作業機を適切な高さに保つていたので、作業
機が間欠的に衝撃的な昇降を反復し、油圧機器の
摩耗及び操縦者に対する振動が激しい等の欠点が
あつた。 Conventionally, the above-mentioned device for automatically raising and lowering a working machine with respect to a machine body having a traveling device using a hydraulic cylinder controls a solenoid valve based on a detection signal from a height detector, thereby operating a hydraulic cylinder. Because the work equipment was kept at an appropriate height, the work equipment repeatedly moved up and down intermittently, causing wear on the hydraulic equipment and severe vibrations for the operator.
本考案は前述の諸欠点を改善することを目的と
するものであつて、走行装置を有する機体に、作
業機を、単動型の油圧シリンダーを介して昇降す
るように装着し、ポンプから前記油圧シリンダー
に通ずる油路に手動切換弁を介装した走行作業機
において、前記手動切換弁の下げ位置にあつて前
記油圧シリンダーに通ずる出口ポートに連通した
別の出口ポートから作動油タンクに通ずる下降油
路に可変絞弁を挿入し、作業機に装着した高さ検
出器を前記可変絞弁のスプールに連動連繋し、上
記可変絞弁の弁室を、入口ポート側は円筒部と
し、出口側はテーパー部となし、前記スプールの
円筒部と対応する部位に、内周面に摺接するピス
トンを取付け、テーパー部と対応する部位には上
記ピストンよりもやや大径のピストンを取付けた
ことを特徴とするものである。 The purpose of the present invention is to improve the above-mentioned drawbacks, and the work equipment is mounted on a machine body having a traveling device so as to be raised and lowered via a single-acting hydraulic cylinder, and a pump is connected to the In a traveling work machine in which a manual switching valve is interposed in an oil passage leading to a hydraulic cylinder, the manual switching valve is in a lowered position and the lowering part is connected to a hydraulic oil tank from another outlet port that communicates with the outlet port leading to the hydraulic cylinder. A variable throttle valve is inserted into the oil passage, a height detector attached to a working machine is interlocked with the spool of the variable throttle valve, and the valve chamber of the variable throttle valve is made into a cylindrical part on the inlet port side and a cylindrical part on the outlet side. is a tapered part, a piston that slides on the inner peripheral surface is attached to a part corresponding to the cylindrical part of the spool, and a piston with a slightly larger diameter than the above piston is attached to a part corresponding to the tapered part. That is.
以下、本考案をコンバインの前処理装置に施し
た例を図面について説明すると、１は走行装置２
を有する機体３上に搭載した脱穀装置であつて、
その前部には刈取装置と穀稈搬送装置とからなる
前処理装置４が上下傾動可能に装着してあり、該
前処理装置４は機体３に取付けた単動型の油圧シ
リンダー５により後部を中心にして上下傾動す
る。 Below, an example in which the present invention is applied to a pre-treatment device of a combine harvester will be explained with reference to the drawings.
A threshing device mounted on a machine body 3 having a
A pre-processing device 4 consisting of a reaping device and a grain culm conveying device is mounted on the front part so as to be tiltable up and down. Tilt up and down around the center.
また、前記油圧シリンダー５と機体上の油圧ポ
ンプ６とを接続した油路７には、中立位置Ａと、
上げ位置Ｂと、下げ位置Ｃとを有する手動切換弁
８を介装し、前記手動切換弁８の下げ位置にあつ
て前記油圧シリンダー５に通ずる出口ポートに連
通した別の出口ポートから作動油タンク９へ通ず
る下降油路１０に可変絞弁１１を挿入し、該可変
絞弁１１を前処理装置４のフレ−ムに装着し、刈
取装置の分草体４ａの直後のフレ−ムに検出器を
取付け、該検出器の構成部材である感知杆１２の
前部を上下傾動自在に枢着し、該感知杆１２は前
記可変絞弁１１のスプール１３に連動連結してあ
る。 Further, the oil passage 7 connecting the hydraulic cylinder 5 and the hydraulic pump 6 on the aircraft body has a neutral position A,
A manual switching valve 8 having a raised position B and a lowered position C is installed, and the hydraulic oil tank is supplied from another outlet port which is in the lowered position of the manual switching valve 8 and communicates with the outlet port communicating with the hydraulic cylinder 5. A variable throttle valve 11 is inserted into the descending oil passage 10 leading to the plant 9, and the variable throttle valve 11 is mounted on the frame of the pretreatment device 4, and a detector is installed on the frame immediately after the weeding body 4a of the reaping device. The front part of a sensing rod 12, which is a component of the detector, is pivoted so as to be tiltable up and down, and the sensing rod 12 is operatively connected to the spool 13 of the variable throttle valve 11.
そして、前記可変絞弁１１の弁室１１′は上部
の円筒部１１ａと、その下端に続いて下方が拡開
したテーパー部１１ｂと、下部の大径部１１ｃと
で構成されており、円筒部１１ａの上部と大径部
１１ｃはバランス油路１４で接続してある。 The valve chamber 11' of the variable throttle valve 11 is composed of an upper cylindrical part 11a, a tapered part 11b that expands downward following the lower end of the upper part, and a lower large diameter part 11c. The upper part of 11a and the large diameter part 11c are connected by a balance oil passage 14.
また、前記弁室１１′に挿入してある前記スプ
ール１３には円筒部１１ａに摺接するピストン１
５とテーパー部１１ｂとの間に絞り間隙ｘを隔て
たピストン１６とが固定してあり、下方のピスト
ン１６の直径d2は上方のピストン１５の直径d1よ
り大径に構成してある。 Further, the spool 13 inserted into the valve chamber 11' has a piston 1 in sliding contact with the cylindrical portion 11a.
A piston 16 is fixed between the piston 5 and the tapered portion 11b with a throttle gap x in between, and the diameter d 2 of the lower piston 16 is larger than the diameter d 1 of the upper piston 15.
更に、入口ポート１７は前記円筒部１１ａの下
端部に連通しており、出口ポート１８は大径部１
１ｃに通じている。 Further, the inlet port 17 communicates with the lower end of the cylindrical portion 11a, and the outlet port 18 communicates with the large diameter portion 1.
It leads to 1c.
前述のコンバインにおいて、路上走行又は機体
回行時等に前処理装置４を上昇させておく場合は
手動切換弁８の操作レバー８ａを第１図ａにおい
て右側へ押して、ポンプ６が圧送する作動油を油
圧シリンダー５に圧入すると前処理装置４が上昇
し、上昇後手動切換弁８を中立位置に戻すと、上
昇姿勢が維持され、感知杆１２は第５図に示すよ
うに地面に接していないのでスプール１３をL3
だげ下方へ抜き出された状態になつている。 In the above-mentioned combine harvester, if the pretreatment device 4 is to be raised when traveling on the road or when the machine is rotating, push the operating lever 8a of the manual switching valve 8 to the right in FIG. When the pretreatment device 4 is press-fitted into the hydraulic cylinder 5, the pretreatment device 4 rises, and when the manual switching valve 8 is returned to the neutral position after rising, the rising posture is maintained, and the sensing rod 12 is not in contact with the ground as shown in Fig. 5. So set spool 13 to L 3
It has been pulled out downwards.
また、刈取作業を開始する時は操作レバー８ａ
は第１図ｂに示す如く左側へ傾動して手動切換弁
８を下げ位置にセツトすると、前処理装置４は下
降する。 In addition, when starting the reaping work, use the operating lever 8a.
When the manual switching valve 8 is tilted to the left as shown in FIG. 1B and the manual switching valve 8 is set in the lowered position, the pretreatment device 4 is lowered.
そして、前記手動切換弁８を下げ位置にセツト
した第１図ｂに示す作業状態ではポンプ６からの
作業油は油圧シリンダー５と可変絞弁１１を有す
る下降油路１０とに分配され、該下降油路１０に
分配された作動油は可変絞弁１１を経て作動油タ
ンク９に還流している。この時、入口ポート１７
から上下のピストン１５，１６間の油室に流入し
た作動油はピストン１６とテーパー部１１ｂとの
間隙で絞られた状態で流動し、ピストン１６より
上部の油圧は上記該ピストン１６により絞られた
分だけ上昇するから、前処理装置保持圧となる絞
り間隙を、例えばx1に設定しておくと、この油圧
により油圧シリンダー５の押上状態が保持され
る。 In the working state shown in FIG. 1b in which the manual switching valve 8 is set to the lower position, the working oil from the pump 6 is distributed to the hydraulic cylinder 5 and the lowering oil passage 10 having the variable throttle valve 11, and the lowering The hydraulic oil distributed to the oil passage 10 is returned to the hydraulic oil tank 9 via the variable throttle valve 11. At this time, inlet port 17
The hydraulic oil flowing into the oil chamber between the upper and lower pistons 15 and 16 flows in a constricted state in the gap between the piston 16 and the tapered portion 11b, and the hydraulic pressure above the piston 16 is constricted by the piston 16. Therefore, if the throttle gap that serves as the pretreatment device holding pressure is set to, for example, x1 , the hydraulic cylinder 5 will be kept in the pushed up state by this oil pressure.
このような状態において、前処理装置４が第３
図に示す如く下降してスプール１３が下方へ抜き
出されてその突出長さがL1になると、テーパー
部１１ｂとピストン１６との絞り間隙x1が大きく
拡大してx3になり、入口ポート１７と対応する部
位の油圧が下がり、これにより油圧シリンダー５
に通ずる油路７の油圧も下がるので、前処理装置
４が急速に下降する。この下降が進行するにつれ
てスプール１３が押し込まれるので、絞り間隙が
順次縮小し、それがx1になると前処理装置４は下
降しなくなる。 In such a state, the preprocessing device 4
As shown in the figure, when the spool 13 descends and is pulled out downward and its protruding length becomes L 1 , the throttle gap x 1 between the taper portion 11b and the piston 16 greatly expands to x 3 , and the inlet port The hydraulic pressure in the part corresponding to 17 decreases, and this causes the hydraulic cylinder 5 to
Since the oil pressure in the oil passage 7 leading to the pretreatment device 4 also decreases, the pretreatment device 4 rapidly descends. As this downward movement progresses, the spool 13 is pushed in, so that the aperture gap gradually decreases, and when it reaches x1 , the pretreatment device 4 will no longer descend.
また、前処理装置４が第４図に示すように高所
に乗り上げると、スプール１３が感知杆１２によ
り押し上げられてその突出長さがL2となり、前
記ピストン１６の絞り間隙ｘがx2になつて入口ポ
ート１７と対応する部位の油圧が上がるので、油
圧シリンダー５が前処理装置４を絞り間隙がx1に
なるまで押し上げる。 Further, when the pretreatment device 4 runs onto a high place as shown in FIG. 4, the spool 13 is pushed up by the sensing rod 12 and its protrusion length becomes L2 , and the throttle gap x of the piston 16 becomes x2 . As a result, the oil pressure at the portion corresponding to the inlet port 17 increases, so the hydraulic cylinder 5 pushes up the pretreatment device 4 until the throttle gap becomes x1 .
更に、作業機がトラクタに装着した耕耘装置で
ある場合、油圧シリンダーをトラクタの機体又は
機体と一体な部材に装着し、検出器を耕耘装置に
取付け、作業機が乗用田植機の植付装置である場
合はフロートを検出器とし、走行機台又はそれと
一体な部材に油圧シリンダーを装着する。 Furthermore, if the working machine is a tilling device attached to a tractor, a hydraulic cylinder is attached to the body of the tractor or a member integrated with the machine body, a detector is attached to the tilling device, and the working machine is a planting device of a riding rice transplanter. In some cases, a float is used as a detector, and a hydraulic cylinder is attached to the traveling machine base or a member integrated therewith.
なお、可変絞弁１１の方向はその接地位置又は
感知杆１２との連動手段をワイヤー若しくはリン
ク等となす場合に応じて横向き、又は逆向きにす
る。 The direction of the variable throttle valve 11 is set horizontally or in the opposite direction depending on its grounding position or when the means for interlocking with the sensing rod 12 is a wire or a link.
本考案は、前述のように走行装置２を有する機
体に、作業機を、単動型の油圧シリンダー５を介
して昇降するように装着し、ポンプ６から前記油
圧シリンダー５に通ずる油路に手動切換弁８を介
装した走行作業機において、前記手動切換弁８の
下げ位置にあつて前記油圧シリンダー５に通ずる
出口ポートに連通した別の出口ポートから作動油
タンクに通ずる下降油路１０に可変絞弁１１を挿
入し、作業機に装着した高さ検出器を前記可変絞
弁１１のスプール１３に連動連繋し、上記可変絞
弁１１の弁室を、入口ポート１７側は円筒部と
し、出口１８側はテーパー部１１ｂとなし、前記
スプール１３の円筒部１１ａと対応する部位に、
内周面に摺接するピストン１５を取付け、テーパ
ー部１１ｂと対応する部位には上記ピストン１５
よりもやや大径のピストン１６を取付けたので、
検出器の感知量に比例して可変絞弁１１のスプー
ル１３が進退し、それに伴つてテーパー部１１の
内周面とそれに対応するピストン１６との間隙が
大幅に変化して上下のピストン１５，１６間の油
圧が急速に変化し、それにより作業機が衝撃的な
昇降をすることがなく、手動操作によらず、簡単
な構成の可変絞弁１１を以つて完全な自動で作業
機の地面に対する高さを常に一定に保持すること
ができる。 In the present invention, a working machine is attached to a machine body having a traveling device 2 as described above so as to be raised and lowered via a single-acting hydraulic cylinder 5, and an oil path leading from a pump 6 to the hydraulic cylinder 5 is manually connected to the machine body. In a traveling work machine equipped with a switching valve 8, when the manual switching valve 8 is in a lowered position, another outlet port communicating with the outlet port communicating with the hydraulic cylinder 5 is variable to a descending oil passage 10 communicating with a hydraulic oil tank. The throttle valve 11 is inserted, a height detector attached to the working machine is interlocked with the spool 13 of the variable throttle valve 11, and the valve chamber of the variable throttle valve 11 is made into a cylindrical part on the inlet port 17 side and a cylindrical part on the outlet port 17 side. 18 side is a tapered part 11b, and a part corresponding to the cylindrical part 11a of the spool 13,
A piston 15 is attached to slide on the inner circumferential surface, and the piston 15 is attached to a portion corresponding to the tapered portion 11b.
Since I installed a piston 16 with a slightly larger diameter than the
The spool 13 of the variable throttle valve 11 advances and retreats in proportion to the amount detected by the detector, and the gap between the inner circumferential surface of the tapered portion 11 and the corresponding piston 16 changes significantly, causing the upper and lower pistons 15, The hydraulic pressure between 16 and 16 changes rapidly, which prevents the work machine from moving up and down shockingly, and allows the work machine to move completely automatically to the ground using the variable throttle valve 11, which has a simple configuration, without manual operation. The height can always be kept constant.
また、作業開始時又は作業中に機体回行が完了
して次ぎの行程に入る時のように作業機を大きく
上昇させた状態から地面まで下降させる時に急速
に下降させることができ、作業能率を向上するこ
とができる。 In addition, when lowering the work equipment from a greatly raised position to the ground, such as at the start of work or when the machine completes rotation during work and enters the next stroke, it can be lowered rapidly to the ground, improving work efficiency. can be improved.
図面は本考案の一実施例を示すものであつて、
第１図ａ，ｂは農用作業機及びその油圧回路図、
ｃは操作レバーの斜視図、第２図は可変絞弁の断
面図、第３図、第４図及び第５図は前処理装置の
昇降制御作用図である。
３……機体、４……前処理装置、５……油圧シ
リンダー、６……油圧ポンプ、７……油路、８…
…手動切換弁、１１……可変絞弁、１２……感知
杆。
The drawings show one embodiment of the present invention,
Figures 1a and 1b are agricultural working machines and their hydraulic circuit diagrams;
2c is a perspective view of the operating lever, FIG. 2 is a sectional view of the variable throttle valve, and FIGS. 3, 4, and 5 are diagrams of the elevation control operation of the preprocessing device. 3... Airframe, 4... Pretreatment device, 5... Hydraulic cylinder, 6... Hydraulic pump, 7... Oil path, 8...
...Manual switching valve, 11...Variable throttle valve, 12...Sensing rod.
Claims (1)
の油圧シリンダー５を介して昇降するように装着
し、ポンプ６から前記油圧シリンダー５に通ずる
油路に手動切換弁８を介装した走行作業機におい
て、前記手動切換弁８の下げ位置にあつて前記油
圧シリンダー５に通ずる出口ポートに連通した別
の出口ポートから作動油タンクに通ずる下降油路
１０に可変絞弁１１を挿入し、作業機に装着した
高さ検出器を前記可変絞弁１１のスプール１３に
連動連繋し、上記可変絞弁１１の弁室を、入口ポ
ート１７側は円筒部とし、出口１８側はテーパー
部１１ｂとなし、前記スプール１３の円筒部１１
ａと対応する部位に、内周面に摺接するピストン
１５を取付け、テーパー部１１ｂと対応する部位
には上記ピストン１５よりもやや大径のピストン
１６を取付けたことを特徴とする走行作業機の高
さ自動調節装置。 Traveling in which a working machine is mounted on a machine body having a traveling device 2 so as to be raised and lowered via a single-acting hydraulic cylinder 5, and a manual switching valve 8 is interposed in an oil path leading from a pump 6 to the hydraulic cylinder 5. In the working machine, when the manual switching valve 8 is in the lowered position, the variable throttle valve 11 is inserted into the descending oil passage 10 that communicates with the hydraulic oil tank from another outlet port that communicates with the outlet port that communicates with the hydraulic cylinder 5. A height detector mounted on the machine is interlocked with the spool 13 of the variable throttle valve 11, and the valve chamber of the variable throttle valve 11 has a cylindrical portion on the inlet port 17 side and a tapered portion 11b on the outlet 18 side. , the cylindrical portion 11 of the spool 13
A traveling work machine characterized in that a piston 15 that slides on the inner circumferential surface is attached to a portion corresponding to a, and a piston 16 having a slightly larger diameter than the piston 15 is attached to a portion corresponding to the tapered portion 11b. Automatic height adjustment device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8360683U JPS59187911U (en) | 1983-05-31 | 1983-05-31 | Automatic height adjustment device for traveling work equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8360683U JPS59187911U (en) | 1983-05-31 | 1983-05-31 | Automatic height adjustment device for traveling work equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS59187911U JPS59187911U (en) | 1984-12-13 |
| JPH0434647Y2 true JPH0434647Y2 (en) | 1992-08-18 |
Family
ID=30213564
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8360683U Granted JPS59187911U (en) | 1983-05-31 | 1983-05-31 | Automatic height adjustment device for traveling work equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59187911U (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06907Y2 (en) * | 1986-06-27 | 1994-01-12 | 株式会社クボタ | All culm-type companion |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57109714U (en) * | 1980-12-25 | 1982-07-07 |
-
1983
- 1983-05-31 JP JP8360683U patent/JPS59187911U/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS59187911U (en) | 1984-12-13 |
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