JPH0230503U - - Google Patents
Info
- Publication number
- JPH0230503U JPH0230503U JP10925088U JP10925088U JPH0230503U JP H0230503 U JPH0230503 U JP H0230503U JP 10925088 U JP10925088 U JP 10925088U JP 10925088 U JP10925088 U JP 10925088U JP H0230503 U JPH0230503 U JP H0230503U
- Authority
- JP
- Japan
- Prior art keywords
- annular grooves
- annular groove
- annular
- bypass passage
- 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.)
- Granted
Links
- 230000002093 peripheral effect Effects 0.000 claims description 4
- 238000003780 insertion Methods 0.000 claims description 3
- 230000037431 insertion Effects 0.000 claims description 3
- 230000007935 neutral effect Effects 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 2
Landscapes
- Operation Control Of Excavators (AREA)
- Multiple-Way Valves (AREA)
- Fluid-Pressure Circuits (AREA)
Description
第1図乃至第3図は本考案に係る選択バルブの
実施例を示す断面説明図で、第1図は中立位置を
示し、第2図は左位置を示し、第3図は右位置を
示す。第4図は油圧シリンダと油圧方向切換バル
ブとの間に本考案に係る選択バルブを配置した油
圧回路図である。第5図は作業機の概略側面図、
第6は油圧シリンダと油圧方向切換バルブとの間
に従来の選択バルブを配設した油圧回路図、第7
図および第8図は従来の選択バルブの断面説明図
である。
8……油圧方向切換バルブ、11……内周面、
12〜18……第1乃至第7の環状凹溝、19…
…スプール挿通孔、40……選択バルブ、41…
…スプール、42〜46……ランド、42a,4
3a……外周面、47……バイパス通路、a,b
,c,d,e,f……ポート。
1 to 3 are cross-sectional explanatory views showing an embodiment of the selection valve according to the present invention, in which FIG. 1 shows the neutral position, FIG. 2 shows the left position, and FIG. 3 shows the right position. . FIG. 4 is a hydraulic circuit diagram in which a selection valve according to the present invention is disposed between a hydraulic cylinder and a hydraulic directional valve. Figure 5 is a schematic side view of the work machine;
No. 6 is a hydraulic circuit diagram in which a conventional selection valve is arranged between a hydraulic cylinder and a hydraulic directional valve; No. 7
8 and 8 are cross-sectional explanatory views of a conventional selection valve. 8...Hydraulic directional valve, 11...Inner peripheral surface,
12-18...first to seventh annular grooves, 19...
...Spool insertion hole, 40...Selection valve, 41...
...Spool, 42-46...Land, 42a, 4
3a...Outer peripheral surface, 47...Bypass passage, a, b
, c, d, e, f... port.
補正 昭63.10.26
図面の簡単な説明を次のように補正する。
明細書中、第15頁第20行「第6は」を「第
6図は」と補正する。Amendment October 26, 1983 The brief description of the drawing is amended as follows. In the specification, on page 15, line 20, "6th wa" is amended to "Fig. 6 wa".
Claims (1)
弁との間の油圧回路中に配設された選択バルブに
おいて、上記選択バルブは、内周面に第1乃至第
7の環状凹溝を並設形成したスプール挿通孔を有
すると共に、シリンダ側に第2、第3、第5及び
第6の環状凹溝に開口するポートを形成し、かつ
、ポンプ側に第4の環状凹溝に開口するポートお
よび第1と第7の環状凹溝に分岐開口するポート
を形成したスリーブと、上記スリーブのスプール
挿通孔に作動位置を3位置に変更可能に挿通し、
かつ、複数のランドを形成すると共に、第1と第
2のランド間に該ランドの外周面に開口するバイ
パス通路を形成したスプールとを具備し、中立位
置では、バイパス通路を閉鎖して第3と第4の環
状凹溝および第6と第7の環状凹溝が夫々連通し
、左右のいずれか一方の位置では、第3の環状凹
溝が第4の環状凹溝およびバイパス通路を介して
第1の環状凹溝に連通し、かつ、第6と第7の環
状溝が連通し、他方の位置では、第1と第2の環
状凹溝および第4と第5の環状凹溝が夫々連通す
るように構成したことを特徴とする選択バルブ。 In the selection valve disposed in the hydraulic circuit between the first and second hydraulic cylinders and the hydraulic directional control valve, the selection valve has first to seventh annular grooves arranged in parallel on its inner peripheral surface. a spool insertion hole formed therein, a port opening to the second, third, fifth, and sixth annular grooves on the cylinder side, and a port opening to the fourth annular groove on the pump side; and a sleeve formed with ports that branch into the first and seventh annular grooves, and inserted into the spool insertion hole of the sleeve so that the operating position can be changed to three positions,
and a spool that forms a plurality of lands and a bypass passage that opens on the outer peripheral surface of the land between the first and second lands, and in the neutral position, the bypass passage is closed and the third land is opened. and the fourth annular groove and the sixth and seventh annular grooves are in communication with each other, and at either the left or right position, the third annular groove is connected to the fourth annular groove and the bypass passage. The first annular groove communicates with the sixth and seventh annular grooves, and at the other position, the first and second annular grooves and the fourth and fifth annular grooves communicate with each other, respectively. A selection valve characterized by being configured to communicate with each other.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP10925088U JPH0526325Y2 (en) | 1988-08-20 | 1988-08-20 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP10925088U JPH0526325Y2 (en) | 1988-08-20 | 1988-08-20 |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH0230503U true JPH0230503U (en) | 1990-02-27 |
JPH0526325Y2 JPH0526325Y2 (en) | 1993-07-02 |
Family
ID=31345323
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP10925088U Expired - Lifetime JPH0526325Y2 (en) | 1988-08-20 | 1988-08-20 |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH0526325Y2 (en) |
-
1988
- 1988-08-20 JP JP10925088U patent/JPH0526325Y2/ja not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
JPH0526325Y2 (en) | 1993-07-02 |
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