JPH0446161U - - Google Patents
Info
- Publication number
- JPH0446161U JPH0446161U JP8743190U JP8743190U JPH0446161U JP H0446161 U JPH0446161 U JP H0446161U JP 8743190 U JP8743190 U JP 8743190U JP 8743190 U JP8743190 U JP 8743190U JP H0446161 U JPH0446161 U JP H0446161U
- Authority
- JP
- Japan
- Prior art keywords
- port
- valve
- pressure
- ports
- 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
- Operation Control Of Excavators (AREA)
- Fluid-Pressure Circuits (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
て低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 through 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, where a valve 28 that communicates and blocks ports A and B is held in a blocking position by a spring 29, and the valve 28 is pushed in the communicating direction by the pressure of port A and the pressure of port B. A pressure receiving part on the port A side and a pressure receiving part on the port B side are provided, and the pressure receiving area on both sides is the same, and a pressure receiving part on the low pressure side is reduced by sliding in the valve 28 due to the pressure difference between ports A and B. 1. A reversal prevention device for a hydraulic motor, characterized in that a free piston 35 is provided, and a means for restricting the flow of pressure oil between ports A and B is provided.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8743190U JPH0446161U (en) | 1990-08-23 | 1990-08-23 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8743190U JPH0446161U (en) | 1990-08-23 | 1990-08-23 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0446161U true JPH0446161U (en) | 1992-04-20 |
Family
ID=31819764
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8743190U Pending JPH0446161U (en) | 1990-08-23 | 1990-08-23 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0446161U (en) |
-
1990
- 1990-08-23 JP JP8743190U patent/JPH0446161U/ja active Pending
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