JPS638403U

JPS638403U -

Info

Publication number: JPS638403U
Application number: JP10296986U
Authority: JP
Priority date: 1986-07-03
Filing date: 1986-07-03
Publication date: 1988-01-20

Description

[Brief explanation of the drawing]

第１図ａは、この考案の１実施例を示し、第１
図ｂは、第２実施例を示す。第２図ａは従来技術
の油圧モータの主要部を含む回路図、第２図ｂは
、斜板部分の正面図。第３図ａは従来技術の油圧
モータの断面図。第３図ｂは、油圧モータの制御
回路図。第４図ａは、斜板２の正面図、第４図ｂ
は、油圧モータの要部断面図である。２……斜板、２ａ，２ｂ……ピボツト点、３…
…主軸、６……シリンダブロツク、７……シリン
ダ、８……ピストン、９……斜板前面、１０……
シユー、１１……弁板、１４……油圧ポンプ、２
０，２１……給排回路、３０ａ，３０ｂ……ボー
ル、３２，３３……斜板背面、５０……油圧モー
タ、５１，５２……傾転用シリンダ、５５，５６
，５５′，５６′……逆止弁、５７……切換弁、
Ｔ……タンク。 FIG. 1a shows one embodiment of this invention, and the first
Figure b shows a second embodiment. FIG. 2a is a circuit diagram including the main parts of a conventional hydraulic motor, and FIG. 2b is a front view of a swash plate portion. FIG. 3a is a sectional view of a prior art hydraulic motor. FIG. 3b is a control circuit diagram of the hydraulic motor. Figure 4a is a front view of the swash plate 2, Figure 4b
1 is a sectional view of a main part of a hydraulic motor. 2...Swash plate, 2a, 2b...Pivot point, 3...
... Main shaft, 6 ... Cylinder block, 7 ... Cylinder, 8 ... Piston, 9 ... Swash plate front, 10 ...
Shu, 11...Valve plate, 14...Hydraulic pump, 2
0, 21... Supply/discharge circuit, 30a, 30b... Ball, 32, 33... Swash plate back, 50... Hydraulic motor, 51, 52... Tilting cylinder, 55, 56
, 55', 56'...Check valve, 57...Switching valve,
T...Tank.

Claims

[Scope of utility model registration request]

The main body rotatably supports an output shaft, and the cylinder block has a cylinder in which an odd number of pistons are slidably fitted into the rotating shaft, and half of the cylinders are connected to the supply side and the discharge side of the supply/discharge circuit. In a swash plate type piston motor, a swash plate having a slanted surface that engages with the cylinder block and that the piston of the cylinder block comes into contact with is rollably provided on the main body, and a swash plate type piston motor is provided with a tilting cylinder that tilts the swash plate. A plurality of are provided at positions corresponding to respective positions where the supply side and discharge side of the cylinders of the cylinder block are connected, and each cylinder is arranged in the same connection position as the connection position between the cylinder and the supply/discharge circuit. A switching valve having a switching position for connecting the supply/discharge circuit and the tilting cylinder and a switching position for connecting the tilting cylinder to the discharge side is provided in the circuit connected to each of the supply/discharge circuits. 1. A speed control device for a swash plate type piston motor, characterized in that the side or switching valve is provided with a check valve that makes the direction of the tilting cylinder the forward direction.