JPH01136685U

JPH01136685U -

Info

Publication number: JPH01136685U
Application number: JP3100988U
Authority: JP
Priority date: 1988-03-10
Filing date: 1988-03-10
Publication date: 1989-09-19
Anticipated expiration: 2003-03-10
Also published as: JPH0729255Y2

Description

[Brief explanation of the drawing]

第１図は、第３図における従来のシユー３を改
良した、その改良部分の側断面図を示し、且つそ
の図示は油圧モータの起動時における状態のシユ
ー部分を示したものであり、第２図は、油圧モー
タが正常に作動している状態におけるシユーの部
分を、第１図と同じ側断面図によつて示し、第３
図は、従来における油圧モータを側断面図によつ
て示し、第４図は、第１図における弁板６のイ矢
視図を示している。実施例に使用した符号は下記のとおりである。
１；シリンダバレル、１ａ；シリンダ、１ｂ；第
１の押しのけ室、１ｃ；ポート、２；ピストン、
２ａ；穿孔、２ｂ；球面、４；カム、５；駆動軸
、５ａ；スプライン、６；弁板、６ｃ；低圧ポー
ト、６ｄ；高圧ポート、３０；第１のシユー、３
０ｂ；穿孔、３１；第２のシユー、３１ａ；オリ
フイス、３１ｂ；静水圧軸受、ｂ；第２の押しの
け室。 FIG. 1 shows a side sectional view of an improved part of the conventional shoe 3 shown in FIG. The figure shows the part of the shoe when the hydraulic motor is operating normally, using the same side sectional view as in Figure 1.
The figure shows a conventional hydraulic motor in a sectional side view, and FIG. 4 shows a view of the valve plate 6 in FIG. 1 in the direction of the arrow. The symbols used in the examples are as follows.
1; cylinder barrel, 1a; cylinder, 1b; first displacement chamber, 1c; port, 2; piston,
2a; perforation, 2b; spherical surface, 4; cam, 5; drive shaft, 5a; spline, 6; valve plate, 6c; low pressure port, 6d; high pressure port, 30; first shoe, 3
0b; perforation; 31; second shoe; 31a; orifice; 31b; hydrostatic bearing; b; second displacement chamber.

Claims

[Claims for Utility Model Registration] A cylinder is bored in the cylinder body that is linked to the drive shaft, and a piston is fitted into the cylinder so as to be able to slide in the axial direction, and the cylinder and the piston are connected to each other. to form a first displacement chamber, a port communicating with the first displacement chamber is bored in the cylinder body, and an end face of the cylinder body in a portion where the port is bored, A fixed part is slidably in contact with the end face, and a high pressure port and a constant pressure port are cut in the fixed part, and the ports communicate with each other alternately by rotation of the cylinder body, and the first part of the piston is provided with a high pressure port and a constant pressure port. A shoe is pivotally attached to the head of the shoe on the opposite side of the displacement chamber, and the end surface of the shoe is a bearing surface that slides on a cam. is divided into a first shoe and a second shoe, the first shoe is pivotally connected to the head of the piston, and the second shoe is pivoted to the first shoe. and a second displacement chamber is formed between the first shoe and the second shoe in the axial direction due to the fitting, The first displacement chamber communicates with a hydrostatic pressure bearing provided on an end face of the second shoe through the second displacement chamber and an orifice formed in the second shoe, and the hydrostatic pressure bearing is , is the bearing surface in the shoe, and when the piston is operating normally, the axial force P1 generated on the piston by the hydraulic pressure in the first displacement chamber and the second displacement chamber The relationship between the force P2 that pushes the first shoe toward the piston due to the hydraulic pressure at
A hydraulic motor characterized by having a relationship of 1>P2.