JPH0325650U - - Google Patents
Info
- Publication number
- JPH0325650U JPH0325650U JP8344889U JP8344889U JPH0325650U JP H0325650 U JPH0325650 U JP H0325650U JP 8344889 U JP8344889 U JP 8344889U JP 8344889 U JP8344889 U JP 8344889U JP H0325650 U JPH0325650 U JP H0325650U
- Authority
- JP
- Japan
- Prior art keywords
- hydraulic
- traveling
- motor
- piping
- lower traveling
- 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
- 230000000712 assembly Effects 0.000 claims 3
- 238000000429 assembly Methods 0.000 claims 3
- 238000010276 construction Methods 0.000 claims 3
- 238000006073 displacement reaction Methods 0.000 claims 3
- 238000010586 diagram Methods 0.000 description 2
- 238000007796 conventional method Methods 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、１５Ａ，１５Ｂ…
…高圧側自己圧配管、１７Ａ，１７Ｂ……容量制
御弁、１７Ａ２，１７Ｂ２……油圧パイロツト部
、１９Ａ，１９Ｂ……パイロツト配管、２０Ａ，
２０Ｂ……走行用モータアツセンブリ、２１……
センタジヨイント（回転継手）、２２，２３……
継手部、２４……高圧選択弁。
FIG. 1 is a hydraulic circuit diagram showing an embodiment of the present invention, and FIG. 2 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, 15A, 15B...
...High pressure side self-pressure piping, 17A, 17B... Capacity control valve, 17A 2 , 17B 2 ... Hydraulic pilot section, 19A, 19B... Pilot piping, 20A,
20B...Traveling motor assembly, 21...
Center joint (rotary joint), 22, 23...
Joint part, 24...High pressure selection valve.
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式の容量制
御弁とからなる左、右の走行用モータアツセンブ
リを下部走行体に設け、該下部走行体上に旋回可
能に搭載される上部旋回体には、前記左、右の走
行用モータアツセンブリの走行用油圧モータとそ
れぞれ左、右の油圧配管を介して接続される油圧
ポンプ、タンクと、前記左、右の油圧配管の途中
に位置する左、右の走行用切換弁とを設け、前記
下部走行体と上部旋回体との間には前記左、右の
油圧配管の途中に位置して回転継手を設けてなる
建設機械の油圧走行用装置において、前記回転継
手には下部走行体側に位置して、前記各走行用油
圧モータに供給するモータ駆動圧力のうち最も高
い高圧側圧力をモータ自己圧として導出する高圧
選択弁を設け、該高圧選択弁を前記各容量制御弁
の油圧パイロツト部と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 a pressure oil to the servo actuator is switched. The lower traveling body is provided with left and right traveling motor assemblies consisting of hydraulic pilot type capacity control valves for controlling the capacity of the lower traveling body, and the upper revolving body rotatably mounted on the lower traveling body is provided with the Hydraulic pumps and tanks are connected to the travel hydraulic motors of the left and right travel motor assemblies via the left and right hydraulic piping, respectively, and the left and right travel motor assemblies are located midway between the left and right hydraulic piping. In the hydraulic traveling device for a construction machine, the hydraulic traveling device for a construction machine is provided with a traveling switching valve, and a rotary joint is provided between the lower traveling body and the upper rotating body and located in the middle of the left and right hydraulic piping. The rotary joint is provided with a high pressure selection valve that is located on the lower traveling body side and derives the highest high pressure side pressure among the motor drive pressures supplied to each of the traveling hydraulic motors as the motor self pressure, and the high pressure selection valve is connected to the 1. A hydraulic travel device for construction machinery, characterized in that each capacity control valve is connected to a hydraulic pilot section through a pilot piping.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8344889U JPH0325650U (en) | 1989-07-15 | 1989-07-15 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8344889U JPH0325650U (en) | 1989-07-15 | 1989-07-15 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0325650U true JPH0325650U (en) | 1991-03-15 |
Family
ID=31631128
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8344889U Pending JPH0325650U (en) | 1989-07-15 | 1989-07-15 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0325650U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007231886A (en) * | 2006-03-03 | 2007-09-13 | Nissan Motor Co Ltd | Lower link in piston crank mechanism of internal combustion engine |
-
1989
- 1989-07-15 JP JP8344889U patent/JPH0325650U/ja active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007231886A (en) * | 2006-03-03 | 2007-09-13 | Nissan Motor Co Ltd | Lower link in piston crank mechanism of internal combustion engine |
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