JPH02127786U

JPH02127786U -

Info

Publication number: JPH02127786U
Application number: JP3634489U
Authority: JP
Priority date: 1989-03-31
Filing date: 1989-03-31
Publication date: 1990-10-22

Description

[Brief explanation of drawings]

第１図は、本考案における一実施例としての油
圧ポンプモータを側断面図によつて示し、第２図
は、第１図における弁面５ｃのイ矢視図を示し、
第３図は、シリンダ胴３のロ矢視図を示し、第４
図は、第１図における流通孔３ｄ近傍の拡大説明
図を示し、第５図は、第４図の作用説明図を示し
、第６図は、従来における油圧ポンプモータの側
断面図を示し、第７図は、第６図における弁面１
５ｃのハ矢視図を示し、第８図は、第６図におけ
るシリンダ胴１３のニ矢視図を示し、第９図は、
第６図における流通孔１３ｄ近傍の拡大説明図を
示し、第１０図は、第９図の作用説明図を示した
ものである。実施例に使用した主な符号は下記のとおりであ
る。１……ケーシング、２……駆動軸、３……シ
リンダ胴、３ａ……シリンダ、３ｂ……ピストン
、３ｃ……押しのけ室、３ｄ……流通孔、３ｅ…
…リセス、３ｆ……絞り流路、３ｇ……シリンダ
端面、４……斜板、５……弁体、５ａ……高圧油
ポート、５ｂ……低圧油ポート、５ｃ……弁面、
５ｆ……ランド。 FIG. 1 shows a side sectional view of a hydraulic pump motor as an embodiment of the present invention, and FIG. 2 shows a view of the valve surface 5c in FIG.
FIG. 3 shows a view of the cylinder body 3 in the direction of the arrow 4.
The figure shows an enlarged explanatory view of the vicinity of the flow hole 3d in Fig. 1, Fig. 5 shows an explanatory view of the operation of Fig. 4, and Fig. 6 shows a side sectional view of a conventional hydraulic pump motor. Figure 7 shows the valve surface 1 in Figure 6.
5c, FIG. 8 shows a double arrow view of the cylinder body 13 in FIG. 6, and FIG. 9 shows the cylinder body 13 in FIG.
An enlarged explanatory view of the vicinity of the communication hole 13d in FIG. 6 is shown, and FIG. 10 is an explanatory view of the action of FIG. 9. The main symbols used in the examples are as follows. DESCRIPTION OF SYMBOLS 1... Casing, 2... Drive shaft, 3... Cylinder body, 3a... Cylinder, 3b... Piston, 3c... Displacement chamber, 3d... Distribution hole, 3e...
...Recess, 3f... Throttle flow path, 3g... Cylinder end face, 4... Swash plate, 5... Valve body, 5a... High pressure oil port, 5b... Low pressure oil port, 5c... Valve surface,
5f...land.

Claims

[Claims for Utility Model Registration] Cylinders are drilled in the axial direction at each position equally divided in the circumferential direction of the cylinder body linked to the drive shaft, and each cylinder and the cylinder are slidable in the axial direction. Displacement chambers are formed by the pistons that are movably fitted together, and from these displacement chambers, a communication hole is formed in the axial end surface of the cylinder body, and the cylinder body is connected to the piston. The valve face of the valve body whose axial end face rotates and slides,
A high-pressure oil port and a low-pressure oil port are cut in the circumferential direction of the drive shaft on the rotationally moving circumference of the circulation hole, and the head of each piston moves along the bearing surface of the swash plate. In the above configuration, each recess is formed in the axial end face of the cylinder in the circumferential direction around the drive shaft, corresponding to each of the displacement chambers. , each communicating with its corresponding displacement chamber via a throttle channel, and having a land formed on the valve surface on which each of the recesses rotates and slides.