JPS61116857U - - Google Patents
Info
- Publication number
- JPS61116857U JPS61116857U JP19982984U JP19982984U JPS61116857U JP S61116857 U JPS61116857 U JP S61116857U JP 19982984 U JP19982984 U JP 19982984U JP 19982984 U JP19982984 U JP 19982984U JP S61116857 U JPS61116857 U JP S61116857U
- Authority
- JP
- Japan
- Prior art keywords
- hydraulic
- valve
- cylinder
- hydraulic cylinder
- selection valve
- 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
- 230000007935 neutral effect Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 2
Landscapes
- Operation Control Of Excavators (AREA)
- Fluid-Pressure Circuits (AREA)
Description
第１図は実施例の油圧回路図、第２図は作業機
を装着した農用トラクタの側面図である。第３図
及び第４図は、それぞれ他の実施例のフロントロ
ーダ側の油圧回路図である。
Ｔ……農用トラクタ、Ｆ……フロントローダ、
１……リフトアーム、２……リフトシリンダ、３
……バケツト、４……ダンプシリンダ、５……油
圧シリンダ選択弁、８……外部油圧取り出し弁、
９……操作レバー、１３……リリーフ弁、１４…
…リリーフ弁、１５……リリーフ弁、１７……切
換スイツチ。
FIG. 1 is a hydraulic circuit diagram of the embodiment, and FIG. 2 is a side view of an agricultural tractor equipped with a working machine. 3 and 4 are hydraulic circuit diagrams on the front loader side of other embodiments, respectively. T...Agricultural tractor, F...Front loader,
1... Lift arm, 2... Lift cylinder, 3
... Bucket, 4 ... Dump cylinder, 5 ... Hydraulic cylinder selection valve, 8 ... External hydraulic pressure take-off valve,
9...operation lever, 13...relief valve, 14...
... Relief valve, 15 ... Relief valve, 17 ... Selector switch.
Claims (1)
用トラクタに着脱自在に装着されるリフトアーム
を昇降する油圧リフトシリンダと、作業機を駆動
する油圧ダンプシリンダとへ、油圧シリンダ選択
弁を接続して、トラクタに設置された油圧ポンプ
を、正送り、中立、逆送りの各ポジシヨンを有し
てトラクタ側に設置された外部油圧取り出し弁を
介して、油圧シリンダ選択弁に接続するとともに
、油圧シリンダ選択弁と外部油圧取り出し弁との
間にリリーフ弁を、又、２個の油圧シリンダのう
ち少なくともダンブシリンダと油圧シリンダ選択
弁との間にリリーフ弁を設けたことを特徴とする
農用トラクタに装着する作業機の油圧回路。 (2) リリーフ弁が油圧シリンダ選択弁と双方の
油圧シリンダとの間に設けら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
る作業機の油圧回路。 (3) 外部油圧取り出し弁を正送りポジシヨンに
シフトすることにより、一方の油圧シリンダを伸
張させ、油圧シリンダ選択弁切り換えスイツチの
ＯＮまたはＯＦＦ時、他方の油圧シリンダも伸張
させるよう、油圧シリンダと油圧シリンダ選択弁
とが接続されている実用新案登録請求の範囲第１
項又は第２項記載の農用トラクタに装着する作業
機の油圧回路。 (4) 外部油圧取り出し弁を正送りポジシヨンに
シフトすることにより、一方の油圧シリンダを収
縮させ、油圧シリンダ選択弁切り換えスイツチの
ＯＮまたはＯＦＦ時、他方の油圧シリンダを伸張
させるよう、油圧シリンダと油圧シリンダ選択弁
とが接続されている実用新案登録請求の範囲第１
項又は第２項記載の農用トラクタに装着する作業
機の油圧回路。 (5) 油圧シリンダ選択弁切り換えスイツチが、
外部油圧取り出し弁操作レバーに設けられている
実用新案登録請求の範囲第１項ないし第４項記載
の農用トラクタに装着する作業機の油圧回路。[Scope of Claim for Utility Model Registration] (1) A hydraulic lift cylinder that has a working machine removably attached to its tip and lifts and lowers a lift arm that is detachably attached to an agricultural tractor, and a hydraulic dump cylinder that drives the working machine. A hydraulic cylinder selection valve is connected to the cylinder, and a hydraulic pump installed on the tractor is connected to the cylinder through an external hydraulic take-off valve installed on the tractor side, which has forward feed, neutral, and reverse feed positions. In addition to being connected to the hydraulic cylinder selection valve, a relief valve is provided between the hydraulic cylinder selection valve and the external hydraulic pressure take-out valve, and a relief valve is provided between at least the dumb cylinder and the hydraulic cylinder selection valve of the two hydraulic cylinders. A hydraulic circuit for a working machine mounted on an agricultural tractor, characterized by the following: (2) A hydraulic circuit for a working machine mounted on an agricultural tractor according to claim 1 of the utility model registration claim, wherein the relief valve is provided between the hydraulic cylinder selection valve and both hydraulic cylinders. (3) By shifting the external hydraulic pressure take-off valve to the normal feed position, one hydraulic cylinder is extended, and when the hydraulic cylinder selection valve changeover switch is turned ON or OFF, the other hydraulic cylinder is also extended. Utility model registration claim 1 where the cylinder selection valve is connected
A hydraulic circuit for a working machine mounted on an agricultural tractor according to item 1 or 2. (4) By shifting the external hydraulic pressure take-off valve to the normal feed position, one hydraulic cylinder is contracted and the other hydraulic cylinder is extended when the hydraulic cylinder selection valve changeover switch is turned ON or OFF. Utility model registration claim 1 where the cylinder selection valve is connected
A hydraulic circuit for a working machine mounted on an agricultural tractor according to item 1 or 2. (5) The hydraulic cylinder selection valve selector switch is
A hydraulic circuit for a working machine mounted on an agricultural tractor as set forth in claims 1 to 4 of the utility model registration claims, which is provided on an external hydraulic pressure take-off valve operating lever.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19982984U JPS61116857U (en) | 1984-12-28 | 1984-12-28 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19982984U JPS61116857U (en) | 1984-12-28 | 1984-12-28 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS61116857U true JPS61116857U (en) | 1986-07-23 |
Family
ID=30760117
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19982984U Pending JPS61116857U (en) | 1984-12-28 | 1984-12-28 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61116857U (en) |
-
1984
- 1984-12-28 JP JP19982984U patent/JPS61116857U/ja active Pending
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