KR970006935A - Hydraulic system of axial piston type hydraulic motor - Google Patents

Abstract

The present invention relates to a hydraulic system for driving an axial piston type hydraulic motor. The hydraulic system according to the present invention is an axial piston type hydraulic motor which can be switched in a forward and reverse direction about an angle at which a swash plate tilt angle forms a right angle with a shaft, wherein the swash plate cylinder and the swash plate cylinder are installed to be double-acting. A swash plate piston having one end of an operating rod connected to one side of the swash plate, two elastic means for elastically biasing both sides of the swash plate piston at a predetermined set pressure in the swash plate cylinder, and according to a predetermined signal, A valve which is switched between a neutral state having an internal flow path communicating both chambers of the swash plate cylinder to be formed with each other, and a state in which oil is applied to any one of the chambers to move the swash plate piston in a predetermined direction; A suction flow path installed between the suction port of the hydraulic motor and the hydraulic pump, A discharge flow path provided between the discharge port of the motor and the tank, a main control valve installed in the suction flow path to open and switch the suction flow path according to a predetermined signal, and installed in the discharge flow path according to a predetermined signal, A flow path switching valve for opening and closing the discharge flow path, a bypass flow path having both ends connected to a predetermined position before and after the flow path switching valve, and a relief valve provided in the bypass flow path.

Description

Hydraulic system of axial piston type hydraulic motor

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

1 is a schematic cross-sectional view showing the structure of a conventional axial piston type hydraulic motor by the applicant of the present application, Figure 2 shows a finite hydraulic system for driving the axial piston type hydraulic motor according to an embodiment of the present invention. Hydraulic circuit diagram.

Claims (3)

An axial piston type hydraulic motor capable of switching forward and backward about an angle at which a swash plate tilt angle is perpendicular to a shaft, comprising: a swash plate cylinder; A swash plate piston installed in the swash plate cylinder to be double-acting and having one end of an operating rod connected to one side of the swash plate; Two elastic means for elastically biasing both sides of the swash plate piston to a predetermined set pressure in the swash plate cylinder; In response to a predetermined signal, the swash plate piston is formed by a neutral state having an internal flow path communicating both chambers of the swash plate cylinder formed around the swash plate piston with each other, and by applying oil to one of the selected chambers. A valve that is switched between states moved in a predetermined direction; A suction passage installed between the suction port of the hydraulic motor and the hydraulic pump; A discharge passage installed between the discharge port of the hydraulic motor and the tank; A main control valve installed in the suction channel and switching the suction channel to open and close according to a predetermined signal; A flow path switching valve installed in the discharge flow path to open and switch the discharge flow path according to a predetermined signal; A bypass passage having both ends connected to a predetermined position before and after the flow path switching valve among the discharge passages; And a relief valve installed in the bypass flow passage. The axial piston type hydraulic motor of claim 1, further comprising a remote control valve for supplying the signal to the valve and the main control valve, wherein the remote control valve supplies the two signals simultaneously. Hydraulic system. The axial piston type hydraulic pressure according to claim 1, wherein the flow path switching valve switches the opening of the discharge flow path in response to a pressure increase in the suction flow path between the main control valve and the suction port. Hydraulic system of the motor. ※ Note: The disclosure is based on the initial application.