JPH0182363U - - Google Patents
Info
- Publication number
- JPH0182363U JPH0182363U JP1987178437U JP17843787U JPH0182363U JP H0182363 U JPH0182363 U JP H0182363U JP 1987178437 U JP1987178437 U JP 1987178437U JP 17843787 U JP17843787 U JP 17843787U JP H0182363 U JPH0182363 U JP H0182363U
- Authority
- JP
- Japan
- Prior art keywords
- hydraulic
- motor
- piping
- pressure
- valves
- 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
- 238000004891 communication Methods 0.000 claims description 3
- 238000006073 displacement reaction Methods 0.000 claims 3
- 230000000712 assembly Effects 0.000 claims 2
- 238000000429 assembly Methods 0.000 claims 2
- 238000010276 construction Methods 0.000 claims 2
- 238000010586 diagram Methods 0.000 description 3
- 238000007796 conventional method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Description
第１図は本考案の実施例を示す油圧回路図、第
２図は第１図の変形例を示す油圧回路図、第３図
は従来技術を示す油圧回路図である。
１Ａ，１Ｂ……走行用油圧モータ、２Ａ，２Ｂ
……容量可変部、３Ａ，３Ｂ……サーボアクチユ
エータ、５Ａ，５Ｂ……油圧ポンプ、６……タン
ク、７Ａ，７Ｂ，８Ａ，８Ｂ……油圧配管、１０
Ａ，１０Ｂ……走行用切換弁、１１Ａ，１１Ｂ…
…高圧選択弁、１７Ａ，１７Ｂ……容量制御弁、
２０Ａ，２０Ｂ……モータアツセンブリ、２１…
…連通配管、２２Ａ，２２Ｂ……逆止弁、２３Ａ
，２３Ｂ……駆動圧配管、２４Ａ，２４Ｂ……パ
イロツト配管、２７Ａ，２７Ｂ……絞り。
FIG. 1 is a hydraulic circuit diagram showing an embodiment of the present invention, FIG. 2 is a hydraulic circuit diagram showing a modification of FIG. 1, and FIG. 3 is a hydraulic circuit diagram showing a conventional technique. 1A, 1B...Hydraulic motor for travel, 2A, 2B
...Variable capacity part, 3A, 3B...Servo actuator, 5A, 5B...Hydraulic pump, 6...Tank, 7A, 7B, 8A, 8B...Hydraulic piping, 10
A, 10B... Travel switching valve, 11A, 11B...
...High pressure selection valve, 17A, 17B...Capacity control valve,
20A, 20B...Motor assembly, 21...
...Communication piping, 22A, 22B...Check valve, 23A
, 23B... Drive pressure piping, 24A, 24B... Pilot piping, 27A, 27B... Throttle.
Claims (1)
ータと、該油圧モータの容量可変部を傾転駆動す
るサーボアクチユエータと、該サーボアクチユエ
ータへの圧油を切換えることにより、前記油圧モ
ータの容量を制御する油圧パイロツト型の容量制
御弁とからなる左、右の走行用モータアツセンブ
リを備え、該各走行用モータアツセンブリの左、
右走行用油圧モータを左、右の油圧配管を介して
それぞれ油圧ポンプとタンクに接続し、前記左、
右の油圧配管の途中には左、右の走行用切換弁を
設けてなる建設機械の油圧走行装置において、前
記左、右の油圧配管には前記油圧モータに供給す
るモータ駆動圧力のうち高圧側圧力をモータ自己
圧として導出する左、右の高圧選択弁を設け、該
各高圧選択弁間を連通配管を介して接続し、該連
通配管の途中には一対の逆止弁を設け、該各逆止
弁間と前記左、右の容量制御弁の油圧パイロツト
部とをそれぞれパイロツト配管を介して接続した
ことを特徴とする建設機械の油圧走行装置。 A variable displacement traveling hydraulic motor having a variable displacement section, a servo actuator that tilts and drives the variable displacement section of the hydraulic motor, and the hydraulic motor by switching the pressure oil to the servo actuator. left and right travel motor assemblies each consisting of a hydraulic pilot-type capacity control valve that controls the capacity of the left and right travel motor assemblies;
The right travel hydraulic motor is connected to the hydraulic pump and tank via left and right hydraulic piping, respectively, and
In a hydraulic traveling system for construction machinery, in which left and right traveling switching valves are provided in the middle of the right hydraulic piping, the left and right hydraulic piping are connected to the high pressure side of the motor drive pressure supplied to the hydraulic motor. Left and right high-pressure selection valves are provided to derive pressure as motor self-pressure, and the high-pressure selection valves are connected via communication piping, and a pair of check valves is provided in the middle of the communication piping, and each 1. A hydraulic traveling device for construction machinery, characterized in that the check valves are connected to the hydraulic pilot portions of the left and right capacity control valves via pilot piping, respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987178437U JPH0182363U (en) | 1987-11-24 | 1987-11-24 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987178437U JPH0182363U (en) | 1987-11-24 | 1987-11-24 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0182363U true JPH0182363U (en) | 1989-06-01 |
Family
ID=31470055
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1987178437U Pending JPH0182363U (en) | 1987-11-24 | 1987-11-24 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0182363U (en) |
-
1987
- 1987-11-24 JP JP1987178437U patent/JPH0182363U/ja active Pending