Hydraulic door hinge

Abstract

The invention discloses a hydraulic door hinge. The hydraulic door hinge comprises a hinge fixing arm, a hinge rotating head and a hydraulic cylinder. The hinge fixing arm is hinged to the hinge rotating head, linkage of the hinge fixing arm and the hinge rotating head is achieved through the hydraulic cylinder, a first piston provided with liquid holes is arranged at the top of the interior of the hydraulic cylinder, and a piston rod is fixedly connected with the first piston; an elastic piece is arranged in the hydraulic cylinder, one end of the elastic piece is fixedly connected with the bottom of the interior of a cylinder body, the other end of the elastic piece is fixedly connected with a second piston, and a seal ring is arranged on the side surface of the second piston; and the position between the first piston and the second piston is a hydraulic cavity, and the position between the second piston and the bottom of the cylinder body is an air pressure cavity. Because the air pressure cavity and the elastic piece are arranged, preliminary buffering can further be conducted on a door plank even if small-angle closing is conducted on the door plank, therefore when a pressure supporting rod conducts small-angle closing on the door plank, buffering can further be well conducted, and the situations that noise is generated in the closing process of the door plank, and the doorlank is damaged due to collision of the door plank and a fixing structure are better avoided.

Description

technical field [0001] The invention relates to a hinge device, in particular to a hydraulic door hinge. Background technique [0002] When opening and closing the room door or other door panels, if the buffer device is not installed, when the door panel is closed, it will collide with the door panel body and the wall or other fixed structures to generate noise, and it is easy to cause the door panel to be worn and affected by frequent collisions. its lifespan. Nowadays, the hydraulic door hinge is generally used as the buffer device when the door panel is closed. The hydraulic door hinge includes a hinge fixed arm and a hinge rotating head, and the hinge fixing arm and the hinge rotating head are hinged. The hinge fixed arm of the hydraulic door hinge is connected to the door panel body, and the hinge rotating head is fixed on the wall / ground. The movement is buffered, reducing the force of the door panel colliding with the fixed structure and reducing the noise caused by...

AI Technical Summary

Problems solved by technology

[0005] The present invention aims to provide a hydraulic door hinge to solve the problem of poor cushioning effect when the door panel is closed at a small angle

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