JPS6228634U - - Google Patents
Info
- Publication number
- JPS6228634U JPS6228634U JP12019885U JP12019885U JPS6228634U JP S6228634 U JPS6228634 U JP S6228634U JP 12019885 U JP12019885 U JP 12019885U JP 12019885 U JP12019885 U JP 12019885U JP S6228634 U JPS6228634 U JP S6228634U
- Authority
- JP
- Japan
- Prior art keywords
- variable displacement
- travel
- pump
- valve
- hydraulic pump
- 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
Landscapes
- Motor Power Transmission Devices (AREA)
Description
第１図は本考案の走行油圧回路の一実施例を示
す回路図、第２図は第１図に示す実施例における
可変容量油圧ポンプの吐出量の流量Ｑと圧力Ｐと
の関係を示す説明図、第３図は従来の走行油圧回
路を示す回路図、第４図は第３図に示す走行油圧
回路における可変容量油圧ポンプの吐出油の流量
Ｑと圧力Ｐとの関係を示す説明図である。
Ｐ１，Ｐ２…可変容量油圧ポンプ、Ｐ３…パイ
ロツトポンプ、Ｍ１，Ｍ２…走行用油圧モータ、
２０，２１，２２…シリンダ、２３…シヤトルバ
ルブ、２４，２５…スイツチバルブ、２６，２７
…走行用操作レバー、２８，２９…他のアクチユ
エータ用操作レバー、３０，３１…カムリンク。
Fig. 1 is a circuit diagram showing an embodiment of the travel hydraulic circuit of the present invention, and Fig. 2 is an explanation showing the relationship between the discharge amount Q and pressure P of the variable displacement hydraulic pump in the embodiment shown in Fig. 1. 3 is a circuit diagram showing a conventional traveling hydraulic circuit, and FIG. 4 is an explanatory diagram showing the relationship between the flow rate Q and pressure P of oil discharged from the variable displacement hydraulic pump in the traveling hydraulic circuit shown in FIG. be. P1 , P2 ...variable displacement hydraulic pump, P3 ...pilot pump, M1 , M2 ...hydraulic motor for travel,
20, 21, 22... Cylinder, 23... Shuttle valve, 24, 25... Switch valve, 26, 27
... Operating lever for driving, 28, 29... Operating lever for other actuators, 30, 31... Cam link.
Claims (1)
ンプの吐出量を制御するシリンダと、上記可変容
量油圧ポンプから吐出される油圧によつて駆動す
る走行用油圧モータと、該可変容量油圧ポンプと
該走行用油圧モータとの間に介設され、走行用油
圧モータの駆動を制御する走行用切換弁および他
のアクチユエータの駆動を制御する他のアクチユ
エータ用切換弁を含むコントロールバルブとを備
えた走行油圧回路において、上記他のアクチユエ
ータ用切換弁と連動して上記可変容量油圧ポンプ
の吐出量を小さく設定する設定手段を設けたこと
を特徴とする走行油圧回路。 ２ 設定手段が、他のアクチユエータ用切換弁と
連動して切換えられるスイツチバルブと、このス
イツチバルブに連絡されるパイロツトポンプとを
有し、スイツチバルブの切換えに応じてパイロツ
トポンプの圧油を、吐出量を制御するシリンダに
導き、該シリンダを駆動させることを特徴とする
実用新案登録請求の範囲第１項記載の走行油圧回
路。[Scope of Claim for Utility Model Registration] 1. A variable displacement hydraulic pump, a cylinder that controls the discharge amount of the variable displacement hydraulic pump, and a traveling hydraulic motor driven by the hydraulic pressure discharged from the variable displacement hydraulic pump; A control that is interposed between the variable displacement hydraulic pump and the travel hydraulic motor and includes a travel switching valve that controls the drive of the travel hydraulic motor and another actuator switching valve that controls the drive of other actuators. 1. A travel hydraulic circuit comprising a valve, further comprising a setting means for setting a discharge amount of the variable displacement hydraulic pump to a small value in conjunction with the other actuator switching valve. 2 The setting means includes a switch valve that is switched in conjunction with other actuator switching valves and a pilot pump that is connected to the switch valve, and discharges pressure oil from the pilot pump in response to switching of the switch valve. The traveling hydraulic circuit according to claim 1, which is characterized in that the traveling hydraulic circuit is guided to a cylinder for controlling the amount and drives the cylinder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12019885U JPH0246417Y2 (en) | 1985-08-07 | 1985-08-07 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12019885U JPH0246417Y2 (en) | 1985-08-07 | 1985-08-07 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6228634U true JPS6228634U (en) | 1987-02-21 |
| JPH0246417Y2 JPH0246417Y2 (en) | 1990-12-07 |
Family
ID=31008289
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12019885U Expired JPH0246417Y2 (en) | 1985-08-07 | 1985-08-07 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0246417Y2 (en) |
-
1985
- 1985-08-07 JP JP12019885U patent/JPH0246417Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0246417Y2 (en) | 1990-12-07 |
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