JPH02118180U - - Google Patents
Info
- Publication number
- JPH02118180U JPH02118180U JP2701189U JP2701189U JPH02118180U JP H02118180 U JPH02118180 U JP H02118180U JP 2701189 U JP2701189 U JP 2701189U JP 2701189 U JP2701189 U JP 2701189U JP H02118180 U JPH02118180 U JP H02118180U
- Authority
- JP
- Japan
- Prior art keywords
- pump
- main pump
- sub
- hydraulic oil
- main
- 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
- 239000010720 hydraulic oil Substances 0.000 claims 2
- 238000010586 diagram Methods 0.000 description 2
- 230000009977 dual effect Effects 0.000 description 2
Description
第１図は本考案の実施例を示す二連ポンプの油
圧回路図、第２図はメインポンプを収装するケー
ス内部の配置を示す概略縦断面図、第３図及び第
４図はいずれも戻し通路の吸込通路への合流状態
を示すポートブロツク部の正面図である。また、
第５図は従来例を示す二連ポンプの油圧回路図で
ある。
１，２……メインポンプ、３……サブポンプ、
３Ａ……吐出口、４……ケース、５……原動機、
９……吸込通路、１３……シヤフト、１４……リ
リーフ弁、１５……戻し通路、１８……ドレーン
。
Fig. 1 is a hydraulic circuit diagram of a dual pump showing an embodiment of the present invention, Fig. 2 is a schematic longitudinal sectional view showing the arrangement inside the case housing the main pump, and Figs. 3 and 4 are both FIG. 3 is a front view of the port block portion showing a state in which the return passage joins the suction passage. Also,
FIG. 5 is a hydraulic circuit diagram of a conventional dual pump. 1, 2...Main pump, 3...Sub pump,
3A...discharge port, 4...case, 5...prime mover,
9... Suction passage, 13... Shaft, 14... Relief valve, 15... Return passage, 18... Drain.
Claims (1)
ポンプからなるポンプユニツトにおいて、サブポ
ンプの吐出口からリリーフ弁を介して分岐した余
剰作動油の戻し通路を、メインポンプを収装する
ケースの内側に導き、メインポンプの吸込通路に
作動油の流れの方向に合わせて合流させたことを
特徴とするポンプユニツト。 In a pump unit consisting of a main pump and a sub-pump that is driven integrally with the main pump, a return passage for excess hydraulic oil that branches off from the discharge port of the sub-pump via a relief valve is guided inside the case housing the main pump, A pump unit characterized in that the suction passage of the main pump is joined to the flow direction of hydraulic oil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1989027011U JP2520689Y2 (en) | 1989-03-09 | 1989-03-09 | Pumping unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1989027011U JP2520689Y2 (en) | 1989-03-09 | 1989-03-09 | Pumping unit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02118180U true JPH02118180U (en) | 1990-09-21 |
| JP2520689Y2 JP2520689Y2 (en) | 1996-12-18 |
Family
ID=31249148
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1989027011U Expired - Fee Related JP2520689Y2 (en) | 1989-03-09 | 1989-03-09 | Pumping unit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2520689Y2 (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5380801A (en) * | 1976-12-27 | 1978-07-17 | Hitachi Ltd | Liqud supply system |
| JPS6110980U (en) * | 1984-06-27 | 1986-01-22 | 株式会社小松製作所 | Axial piston pump cooling system |
-
1989
- 1989-03-09 JP JP1989027011U patent/JP2520689Y2/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5380801A (en) * | 1976-12-27 | 1978-07-17 | Hitachi Ltd | Liqud supply system |
| JPS6110980U (en) * | 1984-06-27 | 1986-01-22 | 株式会社小松製作所 | Axial piston pump cooling system |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2520689Y2 (en) | 1996-12-18 |
Similar Documents
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |