JPH03122140U - - Google Patents
Info
- Publication number
- JPH03122140U JPH03122140U JP3022090U JP3022090U JPH03122140U JP H03122140 U JPH03122140 U JP H03122140U JP 3022090 U JP3022090 U JP 3022090U JP 3022090 U JP3022090 U JP 3022090U JP H03122140 U JPH03122140 U JP H03122140U
- Authority
- JP
- Japan
- Prior art keywords
- bucket
- control valve
- boom
- electromagnetic proportional
- 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.)
- Pending
Links
- 230000008602 contraction Effects 0.000 claims 1
- 230000005284 excitation Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 1
Landscapes
- Operation Control Of Excavators (AREA)
Description
第１図はブーム８を下降する状態のフロントロ
ーダの側面図、第２図はブーム８を上昇する場合
のフロントローダの側面図、第３図は本考案のフ
ロントローダの制御機構の油圧回路図、第４図は
定比分流弁２と大油量パイロツト弁３と電磁切換
弁Ｖ３の部分の断面図、第５図は電磁切換弁Ｖ３
の移動した状態の断面図、第６図・第７図は定比
分流弁２と電磁切換弁Ｖ３の部分の他の実施例を
示す図面、第８図は各制御弁の作動状態を示す図
である。
Ｖ１……電磁比例型バケツト制御弁、Ｖ２……
電磁比例型ブーム制御弁、Ｖ３……電磁切換弁、
２……定比分流弁、３……大油量パイロツト弁、
５……バケツト、７……バケツトシリンダ、８…
…ブーム、９……ブームシリンダ。
Figure 1 is a side view of the front loader with the boom 8 lowered, Figure 2 is a side view of the front loader with the boom 8 raised, and Figure 3 is a hydraulic circuit diagram of the control mechanism of the front loader of the present invention. , Fig. 4 is a sectional view of the constant ratio flow dividing valve 2, large oil flow pilot valve 3, and electromagnetic switching valve V3, and Fig. 5 is a cross-sectional view of the electromagnetic switching valve V3.
6 and 7 are drawings showing other embodiments of the constant ratio flow dividing valve 2 and the electromagnetic switching valve V3, and Fig. 8 is a drawing showing the operating state of each control valve. It is. V1...Solenoid proportional bucket control valve, V2...
Electromagnetic proportional boom control valve, V3...electromagnetic switching valve,
2... Fixed ratio diversion valve, 3... Large oil volume pilot valve,
5...bucket, 7...bucket cylinder, 8...
…Boom, 9…Boom cylinder.
Claims (1)
先端に、バケツトシリンダ７によりダンプ動作と
掬い動作を可能としたバケツト５を枢着し、ブー
ムシリンダ９への圧油を制御する電磁比例型ブー
ム制御弁Ｖ２と、バケツト５の排出速度が掬い速
度よりも速くなるように、バケツトシリンダ７の
伸縮速度を制御する電磁比例型バケツト制御弁Ｖ
１を設け、該電磁比例型バケツト制御弁Ｖ１を掬
い動作側へ、同時に電磁比例型ブーム制御弁Ｖ２
を下降側へ励磁切換すると同時に連動して、電磁
比例型バケツト制御弁へのポンプ流量を増加させ
る電磁切換弁Ｖ３を設けたことを特徴とするフロ
ントローダの制御機構。 An electromagnetic proportional boom control valve that controls pressure oil to the boom cylinder 9 has a bucket 5 that can perform dumping and scooping operations using a bucket cylinder 7 pivoted to the tip of a boom 8 that can be raised and lowered by a boom cylinder 9. V2, and an electromagnetic proportional bucket control valve V that controls the expansion and contraction speed of the bucket cylinder 7 so that the discharge speed of the bucket 5 is faster than the scooping speed.
1, and scoop the electromagnetic proportional bucket control valve V1 to the operation side, and simultaneously move the electromagnetic proportional boom control valve V2 to the operation side.
A control mechanism for a front loader, characterized in that an electromagnetic switching valve V3 is provided, which increases the pump flow rate to the electromagnetic proportional bucket control valve in conjunction with switching the excitation to the downward side.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3022090U JPH03122140U (en) | 1990-03-22 | 1990-03-22 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3022090U JPH03122140U (en) | 1990-03-22 | 1990-03-22 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH03122140U true JPH03122140U (en) | 1991-12-13 |
Family
ID=31532946
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3022090U Pending JPH03122140U (en) | 1990-03-22 | 1990-03-22 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH03122140U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008054562A (en) * | 2006-08-30 | 2008-03-13 | Shinko Koki Kk | Pellet-like corn feed and method for producing the same |
-
1990
- 1990-03-22 JP JP3022090U patent/JPH03122140U/ja active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008054562A (en) * | 2006-08-30 | 2008-03-13 | Shinko Koki Kk | Pellet-like corn feed and method for producing the same |
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