JPS63147570U

JPS63147570U -

Info

Publication number: JPS63147570U
Application number: JP4145587U
Authority: JP
Priority date: 1987-03-20
Filing date: 1987-03-20
Publication date: 1988-09-28

Description

[Brief explanation of the drawing]

第１図は従来例の断面図、第２図はポートプレ
ートの正面図、第３図は第１図の―線断面図
、第４図は本考案の実施例の断面図、第５図はポ
ートプレートの正面図、第６図は第４図の―
線断面図である。１……ドライブシヤフト、２……シリンダブロ
ツク、４……シリンダボア、５……制御本体、６
……ポートプレート、６ａ……当接面、７……吸
入ポート、８……吐出ポート、１０……吸入口、
１１……吐出口、１２……吸入部、１３……流通
部、１４……吸入の始まり側、１５……周壁部、
１５ａ……円弧状部、１６……前壁面。 Fig. 1 is a sectional view of the conventional example, Fig. 2 is a front view of the port plate, Fig. 3 is a sectional view taken along the line - - in Fig. 1, Fig. 4 is a sectional view of the embodiment of the present invention, and Fig. 5 is a sectional view of the port plate. The front view of the port plate, Figure 6 is the same as Figure 4.
FIG. 1... Drive shaft, 2... Cylinder block, 4... Cylinder bore, 5... Control body, 6
... Port plate, 6a ... Contact surface, 7 ... Suction port, 8 ... Discharge port, 10 ... Suction port,
11... Discharge port, 12... Suction part, 13... Distribution part, 14... Suction start side, 15... Surrounding wall part,
15a...Circular part, 16...Front wall surface.

Claims

[Scope of utility model registration request]

The rear end surface of the cylinder block, which rotates with the drive shaft of the hydraulic pump and motor, is supported by the control body integrated with the pump case through a port plate equipped with a cocoon-shaped suction port and discharge port that communicate with the cylinder bore of the cylinder block. The contact surface of the port plate with the control body is formed into a protruding curved surface, and the control body is provided with an inlet port connected to the suction port and a discharge port connected to the discharge port, and the suction port is connected to the suction port. In a device configured to include a suction portion connected to a port and a flow portion with a larger diameter than the suction portion, the peripheral wall surface of the flow portion of the suction port corresponding to the suction start side of the suction port is connected to the suction port. A hydraulic pump, characterized in that the flow section is formed into a smooth arc-shaped part that continues to the suction part, and at least the arc-shaped part side of the front wall surface around the suction part of the circulation part is formed into a curved surface concentric with the protruding curved surface. Motor inlet device.