JPH036070U - - Google Patents
Info
- Publication number
- JPH036070U JPH036070U JP6540389U JP6540389U JPH036070U JP H036070 U JPH036070 U JP H036070U JP 6540389 U JP6540389 U JP 6540389U JP 6540389 U JP6540389 U JP 6540389U JP H036070 U JPH036070 U JP H036070U
- Authority
- JP
- Japan
- Prior art keywords
- piston
- cylinder
- hydraulic pump
- motor
- base
- 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
- 238000007789 sealing Methods 0.000 claims description 2
- 230000003247 decreasing effect Effects 0.000 claims 2
Landscapes
- Reciprocating Pumps (AREA)
- Details Of Reciprocating Pumps (AREA)
- Hydraulic Motors (AREA)
Description
第１図は本考案の第１実施例を示す断面図、第
２図はそのシールリングの正面図、第３図は第２
実施例を示す断面図、第４図は斜軸式油圧ポンプ
・モータの一例を示す断面図、第５図は従来のシ
ール装置の断面図である。
１……ハウジング、２……シリンダーブロツク
、３……シリンダー孔、４……ピストン、５……
シリンダー室、７……環状溝、８……シールリン
グ、１０……内側リング、１１……外側リング、
２０……盲穴、２１……筒状部、２２……リング
。
Fig. 1 is a sectional view showing the first embodiment of the present invention, Fig. 2 is a front view of the seal ring, and Fig. 3 is the second embodiment.
FIG. 4 is a sectional view showing an example of an oblique shaft type hydraulic pump/motor, and FIG. 5 is a sectional view of a conventional sealing device. 1... Housing, 2... Cylinder block, 3... Cylinder hole, 4... Piston, 5...
Cylinder chamber, 7... Annular groove, 8... Seal ring, 10... Inner ring, 11... Outer ring,
20... Blind hole, 21... Cylindrical part, 22... Ring.
Claims (1)
ク２のシリンダー孔３内にピストン４を嵌挿して
シリンダー室５を形成し、シリンダーブロツク２
の回転によつてピストン４を摺動させてシリンダ
ー室５内の容積を増減するようにした油圧ポンプ
・モータにおいて、 前記ピストン４の基部に形成した環状溝７に、
線膨張系数の大きな内側シリンダ１０に線膨張系
数の小さな外側リング１１を嵌合して成るシール
リング８を装着し、その外側リング１１をシリン
ダー孔３の内周面に押付けた油圧ポンプモータの
ピストンシール装置。 (2) ハウジング１内に設けたシリンダーブロツ
ク２のシリンダー孔３内にピストン４を嵌挿して
シリンダー室５を形成し、シリンダーブロツク２
の回転によつてピストン４を摺動させてシリンダ
ー室５内の容積を増減するようにした油圧ポンプ
・モータにおいて、 前記ピストン４の基部に盲穴２０を形成して薄
肉の筒状部２１を形成し、その筒状部２１の内周
面に、ピストン４より線膨張系数の大きなリング
２２を嵌着し、前記筒状部２１の管状突起部２１
ａをシリンダー孔３の内面に押付けたことを特徴
とする油圧ポンプ・モータのピストンシール装置
。[Claims for Utility Model Registration] (1) A piston 4 is fitted into the cylinder hole 3 of the cylinder block 2 provided in the housing 1 to form a cylinder chamber 5, and the cylinder block 2
In a hydraulic pump/motor in which the volume inside the cylinder chamber 5 is increased or decreased by sliding the piston 4 by the rotation of the piston 4, an annular groove 7 formed at the base of the piston 4 is provided with an annular groove 7 formed at the base of the piston 4.
A piston of a hydraulic pump motor is equipped with a seal ring 8 formed by fitting an outer ring 11 with a small linear expansion coefficient to an inner cylinder 10 with a large linear expansion coefficient, and presses the outer ring 11 against the inner circumferential surface of a cylinder hole 3. sealing device. (2) The piston 4 is fitted into the cylinder hole 3 of the cylinder block 2 provided in the housing 1 to form a cylinder chamber 5, and the cylinder block 2
In the hydraulic pump/motor, the volume of the cylinder chamber 5 is increased or decreased by sliding the piston 4 through the rotation of the piston 4. A blind hole 20 is formed at the base of the piston 4, and a thin-walled cylindrical portion 21 is formed in the base of the piston 4. A ring 22 having a linear expansion coefficient larger than that of the piston 4 is fitted onto the inner circumferential surface of the cylindrical portion 21, and the tubular protrusion 21 of the cylindrical portion 21 is
A piston seal device for a hydraulic pump/motor, characterized in that a is pressed against the inner surface of a cylinder hole 3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6540389U JPH036070U (en) | 1989-06-06 | 1989-06-06 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6540389U JPH036070U (en) | 1989-06-06 | 1989-06-06 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH036070U true JPH036070U (en) | 1991-01-22 |
Family
ID=31597201
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6540389U Pending JPH036070U (en) | 1989-06-06 | 1989-06-06 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH036070U (en) |
-
1989
- 1989-06-06 JP JP6540389U patent/JPH036070U/ja active Pending