JPH02126933U - - Google Patents
Info
- Publication number
- JPH02126933U JPH02126933U JP1989037290U JP3729089U JPH02126933U JP H02126933 U JPH02126933 U JP H02126933U JP 1989037290 U JP1989037290 U JP 1989037290U JP 3729089 U JP3729089 U JP 3729089U JP H02126933 U JPH02126933 U JP H02126933U
- Authority
- JP
- Japan
- Prior art keywords
- pilot
- hydraulic
- reducing valve
- pressure reducing
- throttle
- 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
- 238000006073 displacement reaction Methods 0.000 claims 1
- 238000011144 upstream manufacturing Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 2
Landscapes
- Fluid-Pressure Circuits (AREA)
- Operation Control Of Excavators (AREA)
- Braking Systems And Boosters (AREA)
Description
第１図はこの考案の一実施例を示す油圧回路図
、第２図は従来の走行油圧モータの油圧回路図で
ある。
１……主油圧ポンプ、２……走行油圧モータ、
３……走行用切替弁、４……遠隔操作弁、５……
パーキングブレーキ、６……容積切替弁、７……
作業用リリーフ弁、８……走行用リリーフ弁、９
……切替弁、１０……パイロツト油圧ポンプ、１
１……リリーフ弁、１２……絞り、１３……パイ
ロツト管路、１４……減圧弁、１５……電磁弁、
１６……切替弁、１７……パイロツト管路。
FIG. 1 is a hydraulic circuit diagram showing an embodiment of this invention, and FIG. 2 is a hydraulic circuit diagram of a conventional travel hydraulic motor. 1... Main hydraulic pump, 2... Travel hydraulic motor,
3... Travel switching valve, 4... Remote control valve, 5...
Parking brake, 6... Volume switching valve, 7...
Relief valve for work, 8...Relief valve for travel, 9
...Switching valve, 10...Pilot hydraulic pump, 1
1... Relief valve, 12... Throttle, 13... Pilot pipe line, 14... Pressure reducing valve, 15... Solenoid valve,
16...Switching valve, 17...Pilot conduit.
Claims (1)
パーキングブレーキの油圧シリンダと容積切替バ
ルブとに、絞りを設けたパイロツト油圧系路の絞
りの下流側のパイロツト圧油を、減圧弁を介して
供給することにより、パーキングブレーキの制動
解除と走行油圧モータの容積の切替えとを行う走
行油圧モータのパイロツト油圧回路において、前
記減圧弁に至るパイロツト油圧系路の途中に、パ
イロツト油圧により切替えられて、前記絞りの上
流側のパイロツト圧油を前記減圧弁に導通させる
切替弁を設けたことを特徴とする走行油圧モータ
のパイロツト油圧回路。 Pilot pressure oil downstream of the throttle in a pilot hydraulic system path provided with a throttle is supplied to the hydraulic cylinder and volume switching valve of a parking brake equipped on a variable displacement travel hydraulic motor via a pressure reducing valve. As a result, in the pilot hydraulic circuit of the travel hydraulic motor that releases the parking brake and switches the volume of the travel hydraulic motor, the throttle is switched by the pilot hydraulic pressure in the middle of the pilot hydraulic path leading to the pressure reducing valve. 1. A pilot hydraulic circuit for a travel hydraulic motor, characterized in that a switching valve is provided to conduct pilot pressure oil on the upstream side of the pressure reducing valve to the pressure reducing valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1989037290U JPH0644742Y2 (en) | 1989-03-29 | 1989-03-29 | Pilot hydraulic circuit for traveling hydraulic motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1989037290U JPH0644742Y2 (en) | 1989-03-29 | 1989-03-29 | Pilot hydraulic circuit for traveling hydraulic motor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02126933U true JPH02126933U (en) | 1990-10-19 |
| JPH0644742Y2 JPH0644742Y2 (en) | 1994-11-16 |
Family
ID=31544264
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1989037290U Expired - Lifetime JPH0644742Y2 (en) | 1989-03-29 | 1989-03-29 | Pilot hydraulic circuit for traveling hydraulic motor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0644742Y2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1996020355A1 (en) * | 1994-12-27 | 1996-07-04 | Komatsu Ltd. | Brake device for a hydraulic motor |
-
1989
- 1989-03-29 JP JP1989037290U patent/JPH0644742Y2/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1996020355A1 (en) * | 1994-12-27 | 1996-07-04 | Komatsu Ltd. | Brake device for a hydraulic motor |
| US6006872A (en) * | 1994-12-27 | 1999-12-28 | Komatsu Ltd. | Braking apparatus for a hydraulic motor |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0644742Y2 (en) | 1994-11-16 |