JPH0482374U - - Google Patents
Info
- Publication number
- JPH0482374U JPH0482374U JP12505390U JP12505390U JPH0482374U JP H0482374 U JPH0482374 U JP H0482374U JP 12505390 U JP12505390 U JP 12505390U JP 12505390 U JP12505390 U JP 12505390U JP H0482374 U JPH0482374 U JP H0482374U
- Authority
- JP
- Japan
- Prior art keywords
- port
- valve
- pressure
- pressure receiving
- short circuit
- 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
- 230000002265 prevention Effects 0.000 claims description 5
- 230000000903 blocking effect Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 2
Landscapes
- Hydraulic Motors (AREA)
Description
第１図は本考案の第１実施例を示す反転防止弁
の断面図、第２図は油圧回路図、第３図、第４図
は反転防止弁の他の実施例を示す断面図、第５図
は従来の油圧回路図、第６図は安全弁の断面図で
ある。
１は油圧モータ、２，３は第１・第２ポート、
７は安全弁、８は短絡路、１８は短絡路、１９は
反転防止弁、２８は弁、２９はバネ、３５はフリ
ーピストン。
Fig. 1 is a sectional view of a reversal prevention valve showing a first embodiment of the present invention, Fig. 2 is a hydraulic circuit diagram, and Figs. 3 and 4 are sectional views showing other embodiments of the reversal prevention valve. FIG. 5 is a conventional hydraulic circuit diagram, and FIG. 6 is a sectional view of a safety valve. 1 is a hydraulic motor, 2 and 3 are first and second ports,
7 is a safety valve, 8 is a short-circuit path, 18 is a short-circuit path, 19 is a reversal prevention valve, 28 is a valve, 29 is a spring, and 35 is a free piston.
Claims (1)
安全弁７を備えた短絡路８以外の短絡路１８で連
通し、この短絡路１８に反転防止弁１９を設け、
該反転防止弁１９を、 ポートＡとポートＢを連通・遮断する弁２８を
バネ２９で遮断位置に保持し、その弁２８をポー
トＡの圧力及びポートＢの圧力で連通方向に押す
ポートＡ側の受圧部とポートＢ側の受圧部を設け
、かつ両者の受圧面積を同一とし、前記弁２８内
に、ポートＡとポートＢの圧力差によつて摺動し
て上記受圧面積のうち高圧側の受圧面積を小さく
するフリーピストン３５を設け、さらにポートＡ
とポートＢ間の圧油流通を制限する手段及び前記
バネ２９のバネ室２９ａに圧油を供給する切換弁
４０を設けたことを特徴とする油圧モータの反転
防止装置。[Claims for Utility Model Registration] The first port 2 and the second port 3 of the hydraulic motor 1 are connected by a short circuit 18 other than the short circuit 8 provided with the safety valve 7, and the short circuit 18 is provided with a reversal prevention valve 19. ,
The anti-reversal valve 19 is connected to the port A side by holding a valve 28 that communicates and blocks ports A and B in the blocking position with a spring 29, and pushing the valve 28 in the communication direction by the pressure of port A and the pressure of port B. A pressure receiving part on the port B side and a pressure receiving part on the port B side are provided, and the pressure receiving area of both is the same. A free piston 35 is provided to reduce the pressure receiving area of port A.
A reversal prevention device for a hydraulic motor, characterized in that a means for restricting the flow of pressure oil between the port B and a switching valve 40 for supplying pressure oil to the spring chamber 29a of the spring 29 is provided.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12505390U JPH0482374U (en) | 1990-11-29 | 1990-11-29 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12505390U JPH0482374U (en) | 1990-11-29 | 1990-11-29 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0482374U true JPH0482374U (en) | 1992-07-17 |
Family
ID=31872673
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12505390U Pending JPH0482374U (en) | 1990-11-29 | 1990-11-29 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0482374U (en) |
-
1990
- 1990-11-29 JP JP12505390U patent/JPH0482374U/ja active Pending
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