KR950033116A - Hydraulic control device - Google Patents

Abstract

The present invention is applied to a hydraulic system having a hydraulic actuator that applies a constant force or torque to the load by supplying pressure oil, such as a hydraulic cylinder or a hydraulic motor, so that the rate of increase of the hydraulic pressure supplied to the hydraulic actuator can be easily adjusted to a desired form. A hydraulic pressure control device, comprising: a main body having a flow path connected at both ends thereof to a hydraulic pump and a hydraulic actuator, and a first pressure reducing means installed in the main body to reduce pressure of oil supplied from a hydraulic pump; And a second pressure reducing means that is installed in series with the first pressure reducing means in the main body and variably adjusts the pressure of the oil passing through the first pressure reducing means in accordance with the pressure difference between the front and rear of the flow path.

Description

Hydraulic control device

Since this is an open matter, no full text was included.

1 is a schematic diagram showing an example of a conventional hydraulic pressure regulating device, FIG. 2 is a schematic diagram showing an example of another conventional hydraulic pressure regulating device, and FIG. 3 is a diagram showing an example of a hydraulic pressure adjusting device according to an embodiment of the present invention. schematic.

Claims (6)

A hydraulic control device installed between the hydraulic pump and the hydraulic actuator for adjusting the pressure increase rate of the oil supplied from the hydraulic pump to the hydraulic actuator; A main body having a flow path having both ends connected to the hydraulic pump and the hydraulic actuator, respectively; First pressure reducing means installed in the main body to regulate the pressure of the oil supplied from the hydraulic pump; And a second pressure reducing means installed in the body in series with the first pressure reducing means to variably reduce the pressure of the oil passing through the first pressure reducing means according to the pressure difference between the front and rear of the flow path. Hydraulic control device. The oil pressure regulating device according to claim 1, wherein the first pressure reducing means is an orifice provided in the oil pressure pump side oil passage among the oil passages in the main body. The said second pressure reducing means is a poppet valve which is provided in the said hydraulic actuator side flow path of the said flow path in the said main body, and is elastically biased by a predetermined | prescribed set pressure by a pressure setting spring, Hydraulic opening device characterized in that the opening degree of the poppet valve is adjusted according to the pressure difference of the flow path. The hydraulic pressure adjusting device according to claim 1, wherein the first pressure reducing means is an orifice provided in the hydraulic pump side flow path among the flow paths in the main body, and the second pressure reducing means is in the flow path in the main body. A poppet valve installed in the hydraulic actuator side flow path and elastically biased to a predetermined set pressure by a pressure setting spring, and the opening degree of the poppet valve is adjusted according to the pressure difference between the front and rear of the poppet valve. Device. The pressure regulating device according to any one of claims 2 to 4, wherein a pressure equalizing orifice penetrates the inside and the outside of the poppet valve. The bypass flow path according to any one of claims 2 to 5, wherein a bypass flow path is directly connected to the hydraulic pump flow path from the hydraulic actuator side flow path without passing through the poppet valve and the orifice. And a check valve elastically biased at a predetermined set pressure by a support spring in the bypass flow path. ※ Note: The disclosure is based on the initial application.