JPH01141374U - - Google Patents
Info
- Publication number
- JPH01141374U JPH01141374U JP3634288U JP3634288U JPH01141374U JP H01141374 U JPH01141374 U JP H01141374U JP 3634288 U JP3634288 U JP 3634288U JP 3634288 U JP3634288 U JP 3634288U JP H01141374 U JPH01141374 U JP H01141374U
- Authority
- JP
- Japan
- Prior art keywords
- piston
- swash plate
- control
- pilot
- discharge pressure
- 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
- 238000006073 displacement reaction Methods 0.000 claims 2
- 238000010586 diagram Methods 0.000 description 1
Landscapes
- Reciprocating Pumps (AREA)
Description
第１図は従来のダブルピストンポンプの断面図
、第２図は従来の馬力制御手段の説明図、第３図
は本考案の実施例の断面図、第４図は第３図の
―線に沿つた拡大断面図、第５図は第４図のパ
イロツトピストンの部分の拡大断面図、第６図は
第４図の斜板部分の拡大断面図、第７図は本考案
の実施例の線図、第８図は本考案の他の実施例の
断面図、第９図は第８図の要部の拡大断面図、第
１０図は本考案の更に他の実施例の断面図である
。
１…回転軸、３，４…シリンダブロツク、５…
ピストン、６…頭部、７…斜板、１０，１１…制
御ピストン、１５…アーム、１６…支軸、１７…
パイロツト弁、１８…スプール、１９…制御ばね
、２０…パイロツトピストン、２４，２５…油路
。
Fig. 1 is a sectional view of a conventional double piston pump, Fig. 2 is an explanatory diagram of a conventional horsepower control means, Fig. 3 is a sectional view of an embodiment of the present invention, and Fig. 4 is shown along the - line in Fig. 3. 5 is an enlarged sectional view of the pilot piston portion of FIG. 4, FIG. 6 is an enlarged sectional view of the swash plate portion of FIG. 4, and FIG. 7 is an enlarged sectional view of the embodiment of the present invention. 8 is a sectional view of another embodiment of the present invention, FIG. 9 is an enlarged sectional view of the main part of FIG. 8, and FIG. 10 is a sectional view of still another embodiment of the present invention. 1... Rotating shaft, 3, 4... Cylinder block, 5...
Piston, 6... Head, 7... Swash plate, 10, 11... Control piston, 15... Arm, 16... Support shaft, 17...
Pilot valve, 18... Spool, 19... Control spring, 20... Pilot piston, 24, 25... Oil passage.
Claims (1)
２個のシリンダブロツクを各シリンダブロツクの
ピストンの頭部が互に対向するように取付け、両
シリンダブロツクの中間に、前後両面へ各シリン
ダブロツクのピストンの頭部が当接する１枚の傾
動自在の斜板を設け、該斜板の前面と後面に該斜
板の傾動を制御する制御ピストンを当接させ、該
制御ピストンの側方にパイロツト弁のスプールが
連設され且つ制御ばねの弾発力の作用を受けて支
軸を中心として揺動自在のアームを設け、該制御
ピストンの一方には両シリンダブロツクからの高
い方の吐出圧を作用させると共にもう一方には該
パイロツト弁のスプールを介して該高い方の吐出
圧を作用させるようにしたものに於いて、該斜板
に、その傾動方向と直交方向に出没自在で且つ先
端が前記制御ばねによる回転モーメントに抗する
ようにアームに当接した段付パイロツトピストン
を設け、該パイロツトピストンの各段部に各シリ
ンダブロツクの吐出圧を各制御ピストン及び斜板
に形成した油路を介して作用させたことを特徴と
する同時制御形可変容量ダブルピストンポンプ。 Two cylinder blocks with retractable pistons are mounted on a single rotating shaft so that the piston heads of each cylinder block face each other. A tiltable swash plate is provided on which the head of the piston contacts, a control piston for controlling the tilting of the swash plate is placed in contact with the front and rear surfaces of the swash plate, and a pilot is placed on the side of the control piston. An arm is provided which is connected to the spool of the valve and is swingable about a support shaft under the action of the elastic force of a control spring, and one of the control pistons receives the higher discharge pressure from both cylinder blocks. and the higher discharge pressure is applied to the other side through the spool of the pilot valve, wherein the swash plate has a tip that can be retracted and retracted in a direction perpendicular to the direction of tilting of the swash plate. A stepped pilot piston is provided in contact with the arm so as to resist the rotational moment caused by the control spring, and an oil passage formed in each control piston and swash plate is provided at each stepped portion of the pilot piston to supply the discharge pressure of each cylinder block. A simultaneous control type variable displacement double piston pump characterized in that the pump is operated through a simultaneous control type variable displacement double piston pump.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1988036342U JPH0528392Y2 (en) | 1988-03-22 | 1988-03-22 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1988036342U JPH0528392Y2 (en) | 1988-03-22 | 1988-03-22 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01141374U true JPH01141374U (en) | 1989-09-28 |
| JPH0528392Y2 JPH0528392Y2 (en) | 1993-07-21 |
Family
ID=31262952
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1988036342U Expired - Lifetime JPH0528392Y2 (en) | 1988-03-22 | 1988-03-22 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0528392Y2 (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5587865A (en) * | 1978-12-27 | 1980-07-03 | Komatsu Ltd | Control circuit of variable capacity pump |
-
1988
- 1988-03-22 JP JP1988036342U patent/JPH0528392Y2/ja not_active Expired - Lifetime
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5587865A (en) * | 1978-12-27 | 1980-07-03 | Komatsu Ltd | Control circuit of variable capacity pump |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0528392Y2 (en) | 1993-07-21 |