JPS63187704U - - Google Patents
Info
- Publication number
- JPS63187704U JPS63187704U JP7903987U JP7903987U JPS63187704U JP S63187704 U JPS63187704 U JP S63187704U JP 7903987 U JP7903987 U JP 7903987U JP 7903987 U JP7903987 U JP 7903987U JP S63187704 U JPS63187704 U JP S63187704U
- Authority
- JP
- Japan
- Prior art keywords
- oil passage
- check valve
- port
- valve
- tank port
- 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
- 230000001174 ascending effect Effects 0.000 claims 1
- 230000000630 rising effect Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
Landscapes
- Lifting Devices For Agricultural Implements (AREA)
- Operation Control Of Excavators (AREA)
- Fluid-Driven Valves (AREA)
- Safety Valves (AREA)
- Fluid-Pressure Circuits (AREA)
Description
第１図は本考案の作業機の油圧昇降切換弁をト
ラクターの油圧ケースの側面に固設した状態の後
面図、第２図は本考案の作業機の油圧昇降切換弁
Ｖの回路図、第３図は本考案の油圧昇降切換弁Ｖ
の外側面図、第４図は同じく油圧ケース２４の側
面る貼設する取付側面図、第５図は第１図の如く
油圧ケース２４の右側面に付設した場合の油圧昇
降切換弁Ｖの後面図、第６図は同じく前面図、第
７図は第６図のＥ―Ｅ矢視断面図、第８図は第７
図のＡ―Ａ矢視断面図、第９図は同じく第７図の
Ｂ―Ｂ矢視断面図、第１０図は同じく第７図のＣ
―Ｃ矢視断面図である。
Ｖ……作業機の油圧昇降切換弁、１……バルブ
ケース、２……外部取出切換弁、３……フローデ
バイダー、５……チエツク弁、６……上昇用パイ
ロツトチエツクバルブ、７……下降用パイロツト
チエツクバルブ、６ａ，７ａ……背室側の付勢バ
ネ、６ｂ，７ｂ……メイン回路側の付勢バネ、６
ｃ，７ｃ……細油孔、Ｐ……ポンプポート、Ｔ…
…タンクポート、Ｃｙ……シリンダーポート。
Figure 1 is a rear view of the hydraulic lift switching valve of the working machine of the present invention fixed to the side of the hydraulic case of the tractor, Figure 2 is a circuit diagram of the hydraulic lift switching valve V of the working machine of the present invention, Figure 3 shows the hydraulic lift switching valve V of the present invention.
FIG. 4 is a side view of the hydraulic case 24, and FIG. 5 is a rear view of the hydraulic lift switching valve V when attached to the right side of the hydraulic case 24 as shown in FIG. Fig. 6 is a front view, Fig. 7 is a sectional view taken along the line E-E in Fig. 6, and Fig. 8 is a sectional view of Fig. 7.
9 is a cross-sectional view taken along the line A-A in the figure, FIG. 9 is a cross-sectional view taken along the line B-B in FIG. 7, and FIG.
-C is a sectional view taken along arrow C. V... Hydraulic lift switching valve for work equipment, 1... Valve case, 2... External extraction switching valve, 3... Flow divider, 5... Check valve, 6... Pilot check valve for lifting, 7... Lowering pilot check valve, 6a, 7a...biasing spring on the back chamber side, 6b, 7b...biasing spring on the main circuit side, 6
c, 7c...Thin oil hole, P...Pump port, T...
...Tank port, Cy...Cylinder port.
Claims (1)
ンクポートＴとを結ぶ第１の油路と、ポンプポー
トＰとシリンダーポートＣｙを連通する第２の油
路を設け、第１の油路は上昇用パイロツトチエツ
クバルブ６を介して開閉され、該上昇用パイロツ
トチエツクバルブ６には細油孔６ｃを穿設して、
第１の油路内を流れる圧油を背室に導き、該背室
は上昇電磁弁Ｓ１を介してタンクポートＴに開閉
され、更に第２の油路にはチエツク弁５を介在さ
せると共に、第２の油路を下降用パイロツトチエ
ツクバルブ７を介してタンクポートＴに開閉し、
該下降用パイロツトチエツクバルブ７には細油孔
７ｃを穿設し、第２の油路内を流れる圧油を背室
に導き、該背室は下降電磁弁Ｓ２を介してタンク
ポートＴに開閉する構成において、チエツクバル
ブ６，７をタンクポートＴと連通方向に移動開放
させる側に、付勢バネ６ｂ，７ｂを介装したこと
を特徴とする作業機の油圧昇降切換弁。 Inside the valve case 1, a first oil passage connecting the pump port P and the tank port T and a second oil passage communicating the pump port P and the cylinder port Cy are provided, and the first oil passage is for upward movement. It is opened and closed via a pilot check valve 6, and a thin oil hole 6c is bored in the pilot check valve 6 for ascending.
Pressure oil flowing in the first oil passage is guided to a back chamber, which is opened and closed to the tank port T via a rising solenoid valve S1, and a check valve 5 is interposed in the second oil passage. Opening and closing the second oil passage to the tank port T via the descending pilot check valve 7,
A thin oil hole 7c is bored in the descending pilot check valve 7, and the pressure oil flowing in the second oil passage is guided to the back chamber, and the back chamber is opened and closed to the tank port T via the descending solenoid valve S2. A hydraulic lift switching valve for a working machine, characterized in that biasing springs 6b, 7b are interposed on the side where the check valves 6, 7 are moved in the direction of communication with the tank port T to open them.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7903987U JPH0527685Y2 (en) | 1987-05-25 | 1987-05-25 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7903987U JPH0527685Y2 (en) | 1987-05-25 | 1987-05-25 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63187704U true JPS63187704U (en) | 1988-12-01 |
| JPH0527685Y2 JPH0527685Y2 (en) | 1993-07-15 |
Family
ID=30928536
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7903987U Expired - Lifetime JPH0527685Y2 (en) | 1987-05-25 | 1987-05-25 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0527685Y2 (en) |
-
1987
- 1987-05-25 JP JP7903987U patent/JPH0527685Y2/ja not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0527685Y2 (en) | 1993-07-15 |
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