JPH0256869U - - Google Patents
Info
- Publication number
- JPH0256869U JPH0256869U JP13616388U JP13616388U JPH0256869U JP H0256869 U JPH0256869 U JP H0256869U JP 13616388 U JP13616388 U JP 13616388U JP 13616388 U JP13616388 U JP 13616388U JP H0256869 U JPH0256869 U JP H0256869U
- Authority
- JP
- Japan
- Prior art keywords
- displacement
- ball screw
- motor
- spool
- control device
- 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
- 238000006073 displacement reaction Methods 0.000 claims description 10
- 239000012530 fluid Substances 0.000 claims 1
- 238000003825 pressing Methods 0.000 claims 1
- 238000001514 detection method Methods 0.000 description 2
- 230000002265 prevention Effects 0.000 description 1
Landscapes
- Reciprocating Pumps (AREA)
Description
第１図は本考案に係る一実施例の斜板型ピスト
ンポンプ・モータの容量制御装置の平断面図、第
２図は第１図の―矢視縦断面図、第３図は本
考案の別の実施例における第１図の相当部の拡
大図、第４図は従来の斜板型ピストンポンプ・モ
ータの容量制御装置の側断面図、第５図は第４図
の―矢視平断面図、第６図は第４図の―
矢視平断面図、第７図は第６図の―矢視縦断
面図、第８図は第６図の―の矢視縦断面図で
ある。
１……ケーシング、１５……斜板、２３……ア
クチユエータピストン、２４……フイードバツク
レバー、２７……スプール、３７……ステツプモ
ータ、３９ａ……ボールネジナツト、３９ｂ……
ボールネジシヤフト、４３……ばね、４１……部
材（回り止め用）、４７……検出棒、４９……変
位検出用コイル。
Fig. 1 is a plan sectional view of a displacement control device for a swash plate type piston pump/motor according to an embodiment of the present invention, Fig. 2 is a longitudinal sectional view taken in the direction of - arrow of Fig. FIG. 4 is a side cross-sectional view of a conventional displacement control device for a swash plate type piston pump/motor, and FIG. 5 is a cross-sectional view of FIG. Figure 6 is the same as Figure 4.
7 is a vertical cross-sectional view taken in the direction of arrows in FIG. 6, and FIG. 8 is a vertical cross-sectional view taken in the direction of arrows in FIG. 6. DESCRIPTION OF SYMBOLS 1... Casing, 15... Swash plate, 23... Actuator piston, 24... Feedback lever, 27... Spool, 37... Step motor, 39a... Ball screw nut, 39b...
Ball screw shaft, 43... Spring, 41... Member (for rotation prevention), 47... Detection rod, 49... Displacement detection coil.
Claims (1)
力流体を作用させてアクチユエータピストンを変
位させ。同変位に斜板を応動させて容量制御を行
なう可変容量型ピストンポンプ・モータの容量制
御装置において、回転によつて上記スプールを変
位可能に設けられた少なくとも１組のボールネジ
シヤフト及びボールネジナツトと、同ボールネジ
シヤフト及びボールネジナツトの何れかを外部か
らの電気信号によつて回転駆動する電動モータと
を具備してなることを特徴とする可変容量型ピス
トンポンプ・モータの容量制御装置。 Applying pressure fluid controlled by displacement of a spool of a control valve to displace an actuator piston. A displacement control device for a variable displacement piston pump/motor that performs displacement control by making a swash plate respond to the same displacement, at least one set of a ball screw shaft and a ball screw nut that are provided so that the spool can be displaced by rotation; 1. A displacement control device for a variable displacement piston pump/motor, comprising an electric motor that rotates either the ball screw shaft or the ball screw nut using an external electric signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13616388U JPH0256869U (en) | 1988-10-20 | 1988-10-20 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13616388U JPH0256869U (en) | 1988-10-20 | 1988-10-20 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0256869U true JPH0256869U (en) | 1990-04-24 |
Family
ID=31396414
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13616388U Pending JPH0256869U (en) | 1988-10-20 | 1988-10-20 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0256869U (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5347601U (en) * | 1971-06-07 | 1978-04-22 |
-
1988
- 1988-10-20 JP JP13616388U patent/JPH0256869U/ja active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5347601U (en) * | 1971-06-07 | 1978-04-22 |
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