JPS6272356U - - Google Patents

Info

Publication number
JPS6272356U
JPS6272356U JP15913085U JP15913085U JPS6272356U JP S6272356 U JPS6272356 U JP S6272356U JP 15913085 U JP15913085 U JP 15913085U JP 15913085 U JP15913085 U JP 15913085U JP S6272356 U JPS6272356 U JP S6272356U
Authority
JP
Japan
Prior art keywords
switching valve
operating
hydraulic pump
hydraulic
travel motor
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
Application number
JP15913085U
Other languages
Japanese (ja)
Other versions
JPH0352275Y2 (en
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed filed Critical
Priority to JP1985159130U priority Critical patent/JPH0352275Y2/ja
Publication of JPS6272356U publication Critical patent/JPS6272356U/ja
Application granted granted Critical
Publication of JPH0352275Y2 publication Critical patent/JPH0352275Y2/ja
Expired legal-status Critical Current

Links

Landscapes

  • Operation Control Of Excavators (AREA)
  • Fluid-Pressure Circuits (AREA)

Description

【図面の簡単な説明】[Brief explanation of the drawing]

第１図は本考案の油圧回路図、第２図は第１図
の他の実施例、第３図は従来技術の油圧回路図で
ある。 １……切換弁、２……第１走行モータ、４……
旋回モータ、６……ブームシリンダ、８……アー
ムシリンダ、９……第１油圧ポンプ、１０……油
路、２１……第２油圧ポンプ、２６，２６′……
パイロツト切換弁、３１……第３油圧ポンプ、３
２……パイロツト油路、３５……チエツク弁、３
７……開閉弁、３８……絞り、３９……開閉弁、
５５……油路、５６，５６′……可変絞り、５７
……操作具、５８……運転室。 FIG. 1 is a hydraulic circuit diagram of the present invention, FIG. 2 is another embodiment of FIG. 1, and FIG. 3 is a hydraulic circuit diagram of the prior art. 1...Switching valve, 2...First travel motor, 4...
Swing motor, 6...Boom cylinder, 8...Arm cylinder, 9...First hydraulic pump, 10...Oil passage, 21...Second hydraulic pump, 26, 26'...
Pilot switching valve, 31...Third hydraulic pump, 3
2...Pilot oil path, 35...Check valve, 3
7... Opening/closing valve, 38... Throttle, 39... Opening/closing valve,
55... Oil path, 56, 56'... Variable throttle, 57
...Operation tool, 58...Driver's cab.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 油圧シヨベルのアクチユエータを２組のグルー
プに分け、各々別個の油圧ポンプで駆動する如く
した油圧シヨベルの走行モータ操作用切換弁を各
グループの最前列に設け、これと他のアクチユエ
ータ操作用切換弁をタンデムに連結し、他のアク
チユエータ操作用切換弁はそれぞれ並列に連結し
、一方の油圧ポンプからそのグループの走行モー
タ操作用切換弁に通ずる油路にパイロツト切換弁
を設け、また、該パイロツト切換弁へ他方の油圧
ポンプから油路を通ぜしめ、かつ、該パイロツト
切換弁から両切換弁グループの走行モータ操作用
切換弁以外の切換弁へそれぞれ油路を通ぜしめ、
パイロツト切換弁が切換えられた時、一方の油圧
ポンプは両切換弁グループの走行モータ操作用切
換弁へ、他方の油圧ポンプはそれ以外の切換弁へ
通ずる如くした油圧回路において、パイロツト切
換弁と並列に、油圧ポンプと走行モータ操作用切
換弁とを連通する可変絞りのある油路を付加設定
し、該可変絞りを介して両油圧ポンプの吐出油路
を連通せしめたことを特徴とする建設機械の油圧
回路。 The actuators of the hydraulic excavator are divided into two groups, each of which is driven by a separate hydraulic pump, and a switching valve for operating the travel motor of the hydraulic excavator is provided in the front row of each group, and this and the switching valve for operating the other actuators are installed in the front row of each group. The actuator operating switching valves are connected in tandem, and the other actuator operating switching valves are connected in parallel, and a pilot switching valve is provided in the oil path leading from one hydraulic pump to the travel motor operating switching valve of that group. passing an oil passage from the other hydraulic pump to the pilot switching valve, and passing an oil passage from the pilot switching valve to each of the switching valves other than the travel motor operation switching valve of both switching valve groups;
When the pilot switching valve is switched, one hydraulic pump is connected in parallel to the pilot switching valve in a hydraulic circuit that communicates with the switching valve for operating the travel motor in both switching valve groups, and the other hydraulic pump communicates with the other switching valves. A construction machine characterized in that an oil passage with a variable throttle is additionally set to communicate the hydraulic pump and the switching valve for operating the travel motor, and the discharge oil passages of both hydraulic pumps are communicated through the variable throttle. hydraulic circuit.
JP1985159130U 1985-10-16 1985-10-16 Expired JPH0352275Y2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1985159130U JPH0352275Y2 (en) 1985-10-16 1985-10-16

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1985159130U JPH0352275Y2 (en) 1985-10-16 1985-10-16

Publications (2)

Publication Number Publication Date
JPS6272356U true JPS6272356U (en) 1987-05-09
JPH0352275Y2 JPH0352275Y2 (en) 1991-11-12

Family

ID=31083273

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1985159130U Expired JPH0352275Y2 (en) 1985-10-16 1985-10-16

Country Status (1)

Country Link
JP (1) JPH0352275Y2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006283784A (en) * 2005-03-31 2006-10-19 Nabtesco Corp Hydraulic circuit
JP2012067509A (en) * 2010-09-24 2012-04-05 Nippon Sharyo Seizo Kaisha Ltd Hydraulic working machine and method of increasing output

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005054526A (en) * 2003-08-07 2005-03-03 Hitachi Constr Mach Co Ltd Slewing controller for construction machinery

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57197333A (en) * 1981-05-27 1982-12-03 Hitachi Constr Mach Co Ltd Oil-pressure circuit for oil-pressure shovel
JPS604654U (en) * 1983-06-23 1985-01-14 株式会社小松製作所 Power shovel hydraulic circuit system

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS604654B2 (en) * 1977-04-07 1985-02-05 株式会社東芝 Short-circuit protection device for power converter equipment with DC circuit

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57197333A (en) * 1981-05-27 1982-12-03 Hitachi Constr Mach Co Ltd Oil-pressure circuit for oil-pressure shovel
JPS604654U (en) * 1983-06-23 1985-01-14 株式会社小松製作所 Power shovel hydraulic circuit system

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006283784A (en) * 2005-03-31 2006-10-19 Nabtesco Corp Hydraulic circuit
JP4541209B2 (en) * 2005-03-31 2010-09-08 ナブテスコ株式会社 Hydraulic circuit
JP2012067509A (en) * 2010-09-24 2012-04-05 Nippon Sharyo Seizo Kaisha Ltd Hydraulic working machine and method of increasing output

Also Published As

Publication number Publication date
JPH0352275Y2 (en) 1991-11-12

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