JPH0466366U

JPH0466366U -

Info

Publication number: JPH0466366U
Application number: JP10800190U
Authority: JP
Priority date: 1990-10-17
Filing date: 1990-10-17
Publication date: 1992-06-11

Description

[Brief explanation of the drawing]

第１図、第２図は本考案の実施例を示し、第１
図はロツカーカム傾転装置の説明図、第２図は可
変ポンプ・モータの断面図、第３図、第４図は従
来例の説明図である。１はケース、１ａは底壁、４はシリンダーブロ
ツク、６は軸、１１はシリンダー孔、１２はピス
トン、１３はシリンダー室、１５は弁板、１６は
ピストンシユー、１７はシユーリテーナ、１８は
ロツカーカム、４０，４１は第１・第２ポート、
４２は制御ポート、４７は切換弁。 Figures 1 and 2 show embodiments of the present invention;
The figure is an explanatory view of the rocker cam tilting device, FIG. 2 is a sectional view of the variable pump/motor, and FIGS. 3 and 4 are explanatory views of a conventional example. 1 is a case, 1a is a bottom wall, 4 is a cylinder block, 6 is a shaft, 11 is a cylinder hole, 12 is a piston, 13 is a cylinder chamber, 15 is a valve plate, 16 is a piston shoe, 17 is a shoe retainer, 18 is a rocker cam, 40 , 41 are the first and second ports,
42 is a control port, and 47 is a switching valve.

Claims

[Scope of claims for utility model registration] (1) Cylinder block 4 and shaft 6 in case 1
A piston 12 is fitted into the cylinder hole 11 of the cylinder block 4 to form a cylinder chamber 13, and the cylinder chamber 13 is successively communicated with the high pressure port and the low pressure port of the valve plate 15. In a variable motor in which a piston shoe 16 connected to a piston 12 is slidably pressed by a shoe retainer 17 along the front surface of a rocker cam 18, the top dead center side of the valve plate 15 is located between the first port 40 and the second port 41. A control port 42 is formed on the side of the case drain and the bottom dead center side, and the high pressure oil on the high pressure side in the first port 40 and the second port 41 is guided through the shuttle valve, and the high pressure oil on the case drain side and the high pressure side is guided to the control port 42. A variable motor rocker cam tilting device characterized by being provided with a switching valve 47 for selectively supplying the power. (2) The rocker cam tilting device for a variable motor according to claim 1, wherein the high pressure oil guided to the control port 42 is guided from between the motor and the brake valve via a shuttle valve. (3) The rocker cam tilting device for a variable motor according to claim 1, wherein the above structure is built into the end plate 2 of the motor. (4) The variable motor rocker cam tilting device according to claim 1, wherein the switching valve is switched by external pilot pressure.