JPS6424159U - - Google Patents
Info
- Publication number
- JPS6424159U JPS6424159U JP11875987U JP11875987U JPS6424159U JP S6424159 U JPS6424159 U JP S6424159U JP 11875987 U JP11875987 U JP 11875987U JP 11875987 U JP11875987 U JP 11875987U JP S6424159 U JPS6424159 U JP S6424159U
- Authority
- JP
- Japan
- Prior art keywords
- hydraulic
- cylinder
- working machine
- valve
- hydraulic circuit
- 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.)
- Pending
Links
- 239000000470 constituent Substances 0.000 claims 1
- 230000007935 neutral effect Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 2
Landscapes
- Operation Control Of Excavators (AREA)
Description
第１図はこの考案の一実施例を示す油圧回路図
、第２図は先端作業機を農用トラクタに装着した
状態の側面図である。第３図ないし第７図はそれ
ぞれ別の実施例に於ける油圧回路図である。
Ｔ……農用トラクタ、Ｆ……フロントローダ、
１……取付部、２……バケツト、３……リフトア
ーム、４……平行四連リンク機構、５……リフト
シリンダ、７……ダンプシリンダ、８……油圧シ
リンダ選択弁、９ａ，９ｂ，１０ａ，１０ｂ……
油圧配管、１１……油圧取り出し弁、１６，１７
，１９……リリーフ弁。
FIG. 1 is a hydraulic circuit diagram showing an embodiment of this invention, and FIG. 2 is a side view of the tip working machine mounted on an agricultural tractor. 3 to 7 are hydraulic circuit diagrams in different embodiments, respectively. T...Agricultural tractor, F...Front loader,
DESCRIPTION OF SYMBOLS 1...Mounting part, 2...Bucket, 3...Lift arm, 4...Parallel quadruple link mechanism, 5...Lift cylinder, 7...Dump cylinder, 8...Hydraulic cylinder selection valve, 9a, 9b, 10a, 10b...
Hydraulic piping, 11... Hydraulic take-off valve, 16, 17
, 19...Relief valve.
Claims (1)
業機との間に、リフトアームを含む平行四連リン
ク機構を架設し、リフトシリンダとリフトアーム
に対して先端作業機の姿勢を駆動変更するダンプ
シリンダと、前記両シリンダへの油圧供給を選択
する油圧シリンダ選択弁と、油圧の正送り・中立
・逆送りの各ポジシヨンを有して農用トラクタ側
に装備された油圧取り出し弁を備えた先端作業機
の油圧回路であつて、ダンプシリンダを、平行四
連リンク機構のリフトアーム以外のリンクの少な
くとも一部の構成メンバーとするとともに、ダン
プシリンダの両油圧室にそれぞれリリーフ弁を接
続したことを特徴とするトラクタに装着する先端
作業機の油圧回路。 (2) リフトシリンダの油圧シリンダ選択弁との
間の油圧配管にもリリーフ弁が接続されている実
用新案登録請求の範囲第１項記載の農用トラクタ
に装着する先端作業機の油圧回路。 (3) 油圧シリンダ選択弁の選択作動用スイツチ
が、油圧取り出し弁の操作レバーに付設されてい
る実用新案登録請求の範囲第１項記載の農用トラ
クタに装着する先端作業機の油圧回路。[Scope of Claim for Utility Model Registration] (1) A parallel quadruple link mechanism including a lift arm is installed between the detachable attachment part of the agricultural tractor and the tip working machine, and the tip is attached to the lift cylinder and the lift arm. It is equipped on the agricultural tractor side with a dump cylinder that drives and changes the posture of the work equipment, a hydraulic cylinder selection valve that selects the hydraulic pressure supply to both cylinders, and a hydraulic pressure forward, neutral, and reverse feed position. A hydraulic circuit for an advanced working machine equipped with a hydraulic pressure take-off valve, wherein the dump cylinder is a constituent member of at least a part of a link other than the lift arm of a parallel quadruple link mechanism, and both hydraulic chambers of the dump cylinder are connected to each other. A hydraulic circuit for an advanced working machine installed on a tractor, characterized in that each relief valve is connected to the hydraulic circuit. (2) The hydraulic circuit for an advanced working machine installed on an agricultural tractor according to claim 1, wherein a relief valve is also connected to the hydraulic piping between the lift cylinder and the hydraulic cylinder selection valve. (3) A hydraulic circuit for an advanced working machine mounted on an agricultural tractor according to claim 1, wherein a switch for selecting and operating a hydraulic cylinder selection valve is attached to an operating lever of a hydraulic pressure take-off valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11875987U JPS6424159U (en) | 1987-07-31 | 1987-07-31 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11875987U JPS6424159U (en) | 1987-07-31 | 1987-07-31 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6424159U true JPS6424159U (en) | 1989-02-09 |
Family
ID=31363385
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11875987U Pending JPS6424159U (en) | 1987-07-31 | 1987-07-31 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6424159U (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5114706A (en) * | 1974-07-24 | 1976-02-05 | Toyoda Automatic Loom Works | Shoberuroodano baketsutokakudoseigyosochi |
-
1987
- 1987-07-31 JP JP11875987U patent/JPS6424159U/ja active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5114706A (en) * | 1974-07-24 | 1976-02-05 | Toyoda Automatic Loom Works | Shoberuroodano baketsutokakudoseigyosochi |
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