JPS63161641U

JPS63161641U -

Info

Publication number: JPS63161641U
Application number: JP5339287U
Authority: JP
Priority date: 1987-04-10
Filing date: 1987-04-10
Publication date: 1988-10-21

Description

[Brief explanation of the drawing]

第１図は本考案の実施例における負荷補償装置
の結合構造を示す断面図、第２図は第１図に示す
結合構造を適用する本考案と従来例を説明する工
作機械の送り装置を示す断面図、第３図は従来例
における結合構造を示す断面図である。１０１……移動体、１０３……弾性リング、１
０４……ピストン、１０５……油圧切換弁、１０
８……圧力室。 Fig. 1 is a sectional view showing a coupling structure of a load compensation device in an embodiment of the present invention, and Fig. 2 shows a feed device of a machine tool to explain the present invention and a conventional example to which the coupling structure shown in Fig. 1 is applied. Cross-sectional view, FIG. 3 is a cross-sectional view showing a conventional coupling structure. 101... Moving body, 103... Elastic ring, 1
04...Piston, 105...Hydraulic switching valve, 10
8...Pressure chamber.

Claims

[Scope of utility model registration request]

A moving body guided by a column and driven by a feed screw, a hydraulic cylinder having a piston fixed to the column, a force detector and a servo amplifier that detect the force applied to the feed screw, convert it into electric current, and amplify it. By coupling the movable body and the piston of the hydraulic cylinder and distributing a differential pressure proportional to the output of the servo amplifier to the hydraulic cylinder by a servo valve, the force applied to the feed screw is almost zero. In the load compensator, the movable body and the piston of the hydraulic cylinder are coupled to each other by an elastic ring disposed on the outer circumference of the piston, a pressure chamber applying hydraulic pressure to the elastic ring, and the pressure chamber. and an O-ring disposed between the elastic ring and a hydraulic switching valve for controlling hydraulic pressure in the pressure chamber, and displacing the elastic ring by applying hydraulic pressure to the pressure chamber with the hydraulic switching valve, A coupling structure for a load compensator, characterized in that the elastic ring and the piston are fastened together.