DEVICE FOR SLIGHT RECTILINEAR DISPLACEMENT OF HYDRAULICALLY-DRIVEN WORKING MEMBERS Russian patent published in 2015 - IPC B23Q5/06 

FIELD: machine building.

SUBSTANCE: device for slight rectilinear displacement of hydraulically-driven working members comprises a hydraulic engine connected to a working member and to a non-adjustable pump fitted by a safety valve, via a flow regulator. The flow regulator comprises a case with a press-fit hardened bush with two plungers being installed inside so that they can move along the leading axis independently of each other. An eccentric drive is connected to the first plunger, and a micrometer screw set fixedly and fitted by an adjustment spring is connected to the second plunger. A differential spool is installed between the pump and the hydraulic engine and is coupled with a drain tank. The hydraulic engine piston is provided with an annular groove connected to the pump by channels in the rod via a throttling slot of the differential spool with the end cavities of the latter being connected to respectively the working cavity of the hydraulic engine and the annular groove on the hydraulic engine piston. The device is equipped by the drain tank.

EFFECT: increased accuracy of processing and improved surface finish of the processed parts due to small and even feed-ins.

2 dwg