Hinge device

Abstract

The invention discloses a hinge device which has the functions of door stop, automatic door closing, cushioning for door closing and the like. A cam piston, which divides the space in an upper shell into an upper independent compartment and a lower independent compartment, is arranged in the upper shell of the hinge device; and the cam piston moves up and down when the door sheet is opened and closed, thereby driving hydraulic oil in the upper compartment and the lower compartment to flow back and forth in the two compartments. When the door is automatically closed, the cam piston moves down,the hydraulic oil should flow into the upper compartment from the lower compartment via a cushion valve; the action of the resistance of the cushion valve has the cushioning effect on closing door, thereby avoiding overhigh closing speed, lightening the violent impact between a door sheet and a door frame while closing the door, reducing the noise while closing the door, and prolonging the service lives of the door sheet and the door frame. In addition, a hydraulic mechanism does not abrade a mechanical cushioning mechanism, thus the invention has the advantages of stable cushioning effect and long service life.

Description

technical field [0001] The invention relates to a hinge device. Background technique [0002] A hinge device is a connection device that can rotate two connecting parts around an axis to realize opening or folding, and is widely used in the connection between doors and door frames. [0003] Chinese patent publication CN2695575Y discloses a hinge type hinge device with automatic reset function, which includes an upper tube body and a lower tube body fixedly connected with the door frame, a middle tube body and a lower tube body fixedly connected with the door leaf There are torsion springs, torsion spring seats, and torsion spring core rods in the middle, and the center of the lower end of the torsion spring seats is designed as an inner hexagonal or square hole; the middle tube body is equipped with inner stop seats, hollow inner stop core rods, and inner stop core bars. There are spring lower platen, spring, upper platen and screw lower end which are fixedly connected with...

AI Technical Summary

Problems solved by technology

[0006] Although the above-mentioned hinge device has the functions of automatic door closing and door closing buffer, it does not have the function of stopping the hinge at a certain angle, and cannot temporarily stop when opening the door; The frictional resistance generated between adjacent surfaces is achieved by mechanical buffering. The buffering mechanism is prone to wear after long-term use, which greatly affects the buffering effect and service life of the buffering mechanism.

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