JPS6436574U

JPS6436574U -

Info

Publication number: JPS6436574U
Application number: JP13120887U
Authority: JP
Priority date: 1987-08-28
Filing date: 1987-08-28
Publication date: 1989-03-06

Description

[Brief explanation of the drawing]

第１図は本考案の第１実施例を示す概略断面図
、第２図は第１図の―断面図、第３図は第２
図の―断面図、第４図は従来技術によるピス
トンポンプモータの概略断面図、第５，６図はそ
れぞれ本考案の第２、第３実施例の概略断面図、
第７図は本考案の第４実施例を示す部分断面図で
ある。２……ハウジング、４……斜板、６……シリン
ダブロツク、８……ピストン、１０……ピストン
孔、１２……ポートプレート、１４……駆動軸、
１６，１８……軸受、２０……蓋、３３……シー
ル部材。 Fig. 1 is a schematic cross-sectional view showing the first embodiment of the present invention, Fig. 2 is a cross-sectional view of Fig. 1, and Fig. 3 is a cross-sectional view of the second embodiment of the present invention.
4 is a schematic sectional view of a piston pump motor according to the prior art, and FIGS. 5 and 6 are schematic sectional views of second and third embodiments of the present invention, respectively.
FIG. 7 is a partial sectional view showing a fourth embodiment of the present invention. 2... Housing, 4... Swash plate, 6... Cylinder block, 8... Piston, 10... Piston hole, 12... Port plate, 14... Drive shaft,
16, 18... Bearing, 20... Lid, 33... Seal member.

Claims

[Claims for Utility Model Registration] (1) A housing that grips a bearing that supports a drive shaft at one end and that penetrates the drive end of the drive shaft, a piston, and a piston that rotates together with the drive shaft and extends along the axis. a cylinder block having a plurality of piston holes in which the piston is slidably inserted without reducing its diameter; a swash plate that allows the piston to reciprocate along an inclined surface; In a swash plate type piston pump/motor consisting of a port plate forming a pair of crescent-shaped ports for supplying and discharging pressure oil, and a lid that closes the other end of the housing and supports the other end of the drive shaft via a bearing. , the drive shaft and cylinder block are integrally formed, a crescent-shaped port is formed on one side that slides into the cylinder block, and a sealing member with a similar shape and a larger sealing area than the one side is inserted on the other side of the port plate. The port plate is brought into sliding contact with the cylinder block using the elastic force of the elastic seal member constituting the seal member and the force of the pressure oil acting on the difference in area between the seal areas on the one side and the other side. Features a swash plate type piston pump motor. (2) The swash plate type piston pump/motor according to claim 1, wherein the sliding surface between the cylinder block and the port plate is spherical. (3) The swash plate type piston according to claim 1 or 2, wherein the axial center of the piston hole is arranged on the generatrix of a cone having its apex on the drive shaft line on the port plate side of the cylinder block. pump motor. (4) Claims 1, 2 or 3 for utility model registration in which the lid is provided with a groove into which a sealing member is inserted.
The swash plate type piston pump/motor described in .