JPS6392082U

JPS6392082U -

Info

Publication number: JPS6392082U
Application number: JP18629186U
Authority: JP
Priority date: 1986-12-03
Filing date: 1986-12-03
Publication date: 1988-06-14

Description

[Brief explanation of the drawing]

第１図は本考案の一実施例に係る容量可変型液
圧回転機の縦断面図、第２図は大容量に設定した
状態を示す第１図中の―矢示方向要部拡大図
、第３図は第２図中の―矢示方向断面図、第
４図は少容量に設定した状態を示す第２図と同様
位置の要部拡大図、第５図は第４図中の―矢
示方向断面図である。１……ケーシング、４……回転軸、５……軸受
、６……シリンダブロツク、７……軸挿入部、８
……シリンダ、１０……サブポート、１４……ピ
ストン、１６……弁板、１７，１８……吸排ポー
ド、２４……ピントルバルブ、２７，２８……連
通深溝、３３，３４……排出用連通溝。 FIG. 1 is a longitudinal sectional view of a variable capacity hydraulic rotating machine according to an embodiment of the present invention, and FIG. 2 is an enlarged view of the main part in the direction of the - arrow in FIG. Fig. 3 is a sectional view in the direction of the arrow in Fig. 2, Fig. 4 is an enlarged view of the main part at the same position as Fig. 2, showing a state where the capacity is set to a small capacity, and Fig. 5 is a sectional view in the direction of the - arrow in Fig. 4. It is a sectional view in the direction of the arrow. DESCRIPTION OF SYMBOLS 1... Casing, 4... Rotating shaft, 5... Bearing, 6... Cylinder block, 7... Shaft insertion part, 8
... Cylinder, 10 ... Sub port, 14 ... Piston, 16 ... Valve plate, 17, 18 ... Suction and exhaust port, 24 ... Pintle valve, 27, 28 ... Communication deep groove, 33, 34 ... Discharge communication groove.

Claims

[Scope of utility model registration request]

a rotating shaft protruding rotatably within the casing via a bearing; a cylinder block rotatably disposed within the casing together with the rotating shaft, and having a shaft insertion portion bored in the center in the axial direction; A plurality of cylinders located on the outer peripheral side of the shaft insertion portion and bored in the cylinder block, a piston slidably provided in each cylinder, and a plurality of cylinders for communicating between each cylinder and the shaft insertion portion. A plurality of sub-ports are formed radially on the cylinder block, and the sub-ports are fixed to the casing so as to be able to come into sliding contact with the cylinder block, and are located between the dead center and the top dead center so as to sequentially communicate with each of the cylinders. a valve plate having a pair of suction/exhaust ports, a pintle valve fitted so as to be slidable in the axial direction between the head portion of the casing and the shaft insertion portion of the cylinder block; a cylinder on the high pressure side through the sub-port, which is spaced apart in the circumferential direction and is recessed;
A pair of large-capacity communication grooves that communicate all of the low-pressure side cylinders with the suction/exhaust ports, and a pair of large-capacity communication grooves that are recessed in the outer circumferential surface of the pintle valve at a predetermined distance in the axial direction from the large-capacity communication grooves. A variable capacity hydraulic rotary machine comprising a discharge communication groove that communicates only with a sub-port of a cylinder that is not in communication with the suction/discharge port by displacing a valve in the axial direction.