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2 STEP AUTO STROKE HYDRAULIC BREAKER
The present invention relates to an automatic two stage-stroke hydraulic breaker capable of automatically converting a stroke of a piston by selecting one among a two stage-stroke of a long stroke or a short stroke according to the strength of a rock which is an object to be crushed, and reducing costs and failure factors by achieving a simple structure of a valve and a flow path for detecting the strength of a rock which is an object to be crushed by improving the structure thereof. According to the present invention, a hydraulic breaker having a automatic two stage-stroke comprises: a cylinder wherein a piston to be vertically lifted is embedded inside, having a high pressure chamber filled with hydraulic pressure supplied from a pump in an upper part, a lower pressure chamber in the middle, and having a sensing port, a long stroke port, and a short stroke port outside; a control valve prepared in a flow path between the cylinder and the pump for controlling the direction of providing hydraulic pressure; a stroke switching valve wherein a first flow path which is a passage to the high pressure chamber is connected to an upper part, wherein a second flow path which is a connection passage with a tank is connected to a lower part, and for selectively connecting a third flow path wherein the control valve and the short stroke port of the cylinder are connected; a fourth flow path for connecting the long stroke port and the control valve; a bypass flow path for connecting the first flow path and the second flow path; and an orifice prepared in the bypass flow path.
2 STEP AUTO STROKE HYDRAULIC BREAKER
The present invention relates to an automatic two stage-stroke hydraulic breaker capable of automatically converting a stroke of a piston by selecting one among a two stage-stroke of a long stroke or a short stroke according to the strength of a rock which is an object to be crushed, and reducing costs and failure factors by achieving a simple structure of a valve and a flow path for detecting the strength of a rock which is an object to be crushed by improving the structure thereof. According to the present invention, a hydraulic breaker having a automatic two stage-stroke comprises: a cylinder wherein a piston to be vertically lifted is embedded inside, having a high pressure chamber filled with hydraulic pressure supplied from a pump in an upper part, a lower pressure chamber in the middle, and having a sensing port, a long stroke port, and a short stroke port outside; a control valve prepared in a flow path between the cylinder and the pump for controlling the direction of providing hydraulic pressure; a stroke switching valve wherein a first flow path which is a passage to the high pressure chamber is connected to an upper part, wherein a second flow path which is a connection passage with a tank is connected to a lower part, and for selectively connecting a third flow path wherein the control valve and the short stroke port of the cylinder are connected; a fourth flow path for connecting the long stroke port and the control valve; a bypass flow path for connecting the first flow path and the second flow path; and an orifice prepared in the bypass flow path.
2 STEP AUTO STROKE HYDRAULIC BREAKER
PARK YONG SHIK (author) / LEE JEONG DUCK (author)
2015-09-08
Patent
Electronic Resource
Korean
IPC:
E02F
Baggern
,
DREDGING
4 4 step variable intelligent auto stroke hydraulic breaker
| European Patent Office | 2020