JPH0475166U

JPH0475166U -

Info

Publication number: JPH0475166U
Application number: JP11909990U
Authority: JP
Priority date: 1990-11-13
Filing date: 1990-11-13
Publication date: 1992-06-30
Anticipated expiration: 2005-11-13
Also published as: JP2533432Y2

Description

[Brief explanation of the drawing]

図面は本考案の実施例を示すもので、第１図は
油圧ポンプの縦断面図、第２図は第１図−線
断面図、第３図はシリンダバレルと斜板の斜視図
、第４図は油圧ポンプの油圧回路構成図、第５図
は別実施例に係る第５図相当図、第６図は従来技
術に係る第３図相当図である。１Ａ，１Ｂ，１Ｃ……ハウジング、２……シリ
ンダバレル、３……ピストン穴、４……ピストン
、５……斜板、６……シヤフト、１１……弁板、
１２……吸入ポート、１３……第１吐出ポート、
１４……第２吐出ポート、２７……油圧ポケツト
、３０……直動型レギユレータ、３０Ａ……サー
ボ型レギユレータ、４０……平均圧発生回路、４
２，４３……絞り。 The drawings show an embodiment of the present invention, in which Fig. 1 is a longitudinal sectional view of a hydraulic pump, Fig. 2 is a sectional view taken along the line of Fig. 1, Fig. 3 is a perspective view of the cylinder barrel and swash plate, and Fig. 4 is a longitudinal sectional view of the hydraulic pump. 5 is a diagram corresponding to FIG. 5 according to another embodiment, and FIG. 6 is a diagram corresponding to FIG. 3 according to the prior art. 1A, 1B, 1C... Housing, 2... Cylinder barrel, 3... Piston hole, 4... Piston, 5... Swash plate, 6... Shaft, 11... Valve plate,
12... Suction port, 13... First discharge port,
14... Second discharge port, 27... Hydraulic pocket, 30... Direct acting type regulator, 30A... Servo type regulator, 40... Average pressure generation circuit, 4
2,43...Aperture.

Claims

[Claims for Utility Model Registration] (1) A cylinder barrel housed in a housing, a shaft that transmits rotational driving force to the cylinder barrel, and a plurality of pistons slidably installed in piston holes of the cylinder barrel. , a swash plate that guides the plurality of pistons, and a valve that slides into the cylinder barrel and has a suction port and two discharge ports from which the discharge pressure from two groups of pistons is discharged, respectively. In a dual discharge flow type swash plate type hydraulic piston pump equipped with a plate, an average pressure generation circuit is provided which receives the discharge pressure from both discharge ports and generates an average pressure of both discharge pressures through a pair of throttles. The average pressure output from the pressure generating circuit is transmitted through an oil path formed in the housing to the hydraulic pocket of the sliding support part on the discharge side of a pair of sliding support parts that rotatably support the swash plate. A dual discharge flow type swash plate type hydraulic piston pump, characterized in that it is configured to supply water to. (2) A cylinder barrel housed in a housing, a shaft that transmits rotational driving force to the cylinder barrel, a plurality of pistons slidably installed in the piston hole of the cylinder barrel, and a guide for these plurality of pistons. A multiple discharge flow system comprising a swash plate, a suction port, and a valve plate that slides against the cylinder barrel and has two discharge ports to which discharge pressure from two groups of pistons is discharged, respectively. In the type swash plate type hydraulic piston pump, an average pressure generation circuit is provided which receives the discharge pressure from both discharge ports and generates an average pressure of both discharge pressures through a pair of throttles, and the average pressure output from the average pressure generation circuit is A dual discharge flow type swash plate hydraulic piston pump characterized by being provided with a regulator that controls the tilt angle of the swash plate in response to pressure.