JPH0216804U - - Google Patents
Info
- Publication number
- JPH0216804U JPH0216804U JP9509988U JP9509988U JPH0216804U JP H0216804 U JPH0216804 U JP H0216804U JP 9509988 U JP9509988 U JP 9509988U JP 9509988 U JP9509988 U JP 9509988U JP H0216804 U JPH0216804 U JP H0216804U
- Authority
- JP
- Japan
- Prior art keywords
- oil
- control valve
- pressure oil
- pump
- valve device
- 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.)
- Granted
Links
- 230000008602 contraction Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 2
- 230000007935 neutral effect Effects 0.000 description 1
Landscapes
- Lifting Devices For Agricultural Implements (AREA)
- Fluid-Pressure Circuits (AREA)
Description
図面は、本考案に係る作業部の昇降制御バルブ
構造の実施例を示したものであつて、第１図は農
用トラクタの側面図、第２図は油圧回路図、第３
図は油圧ハウジングの展開断面図、第４図Ｗ，Ｘ
，Ｙ，Ｚはコントロールバルブの中立状態、下降
状態、上昇状態、減速上昇状態をそれぞれ示す展
開断面図である。
図中、３は作業部、５はリフトアームシリンダ
、７はコントロールバルブ、８は油圧ハウジング
、８ａ，８ｂは油路、９はポンプポート、１０は
シリンダポート、２１ａは絞りバルブ部、Ｅは迂
回油路である。
The drawings show an embodiment of the lift control valve structure for the working part according to the present invention, in which Fig. 1 is a side view of an agricultural tractor, Fig. 2 is a hydraulic circuit diagram, and Fig. 3 is a hydraulic circuit diagram.
The figure is an expanded sectional view of the hydraulic housing, Figure 4 W, X
, Y, and Z are developed cross-sectional views showing the control valve in a neutral state, a lowered state, a raised state, and a decelerated and raised state, respectively. In the figure, 3 is a working part, 5 is a lift arm cylinder, 7 is a control valve, 8 is a hydraulic housing, 8a, 8b are oil passages, 9 is a pump port, 10 is a cylinder port, 21a is a throttle valve part, and E is a detour It is an oil road.
Claims (1)
う制御バルブ装置を、該制御バルブ装置のポンプ
ポートに油圧ポンプからの圧油供給をするポンプ
側油路と、制御バルブ装置のシリンダポートから
の圧油を前記油圧シリンダ側に供給するシリンダ
側油路とがそれぞれ形成された油圧ハウジングに
一体的に組付けると共に、制御バルブ装置には、
昇降速度減速制御状態にセツトされたとき、ポン
プポートからの圧油供給をロツクするバルブロツ
ク機構を設ける一方、油圧ハウジングには、前記
ロツク状態での圧油を受けてポンプ側油路からシ
リンダ側油路へ絞つて圧油供給をする絞り機構付
きの迂回油路を設けたことを特徴とする作業部の
昇降制御バルブ構造。 A control valve device that controls the expansion and contraction of the hydraulic cylinder for lifting and lowering the working part is connected to a pump-side oil path that supplies pressure oil from the hydraulic pump to the pump port of the control valve device, and a pressure oil path that supplies pressure oil from the cylinder port of the control valve device. and a cylinder-side oil passage for supplying the oil to the hydraulic cylinder side, and the control valve device includes:
A valve lock mechanism is provided to lock the supply of pressure oil from the pump port when the lifting speed deceleration control state is set, and the hydraulic housing receives the pressure oil in the locked state and releases oil from the pump side oil path to the cylinder side. A lift control valve structure for a working part, characterized by providing a detour oil passage with a throttling mechanism to supply pressure oil to the passage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9509988U JPH079Y2 (en) | 1988-07-20 | 1988-07-20 | Lifting control valve structure of working part |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9509988U JPH079Y2 (en) | 1988-07-20 | 1988-07-20 | Lifting control valve structure of working part |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0216804U true JPH0216804U (en) | 1990-02-02 |
| JPH079Y2 JPH079Y2 (en) | 1995-01-11 |
Family
ID=31319719
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9509988U Expired - Lifetime JPH079Y2 (en) | 1988-07-20 | 1988-07-20 | Lifting control valve structure of working part |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH079Y2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0654416U (en) * | 1991-01-11 | 1994-07-26 | 株式会社アマダ | Press brake |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11230503B2 (en) * | 2017-06-27 | 2022-01-25 | General Electric Company | Resin for production of porous ceramic stereolithography and methods of its use |
-
1988
- 1988-07-20 JP JP9509988U patent/JPH079Y2/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0654416U (en) * | 1991-01-11 | 1994-07-26 | 株式会社アマダ | Press brake |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH079Y2 (en) | 1995-01-11 |