Automatic door closing hinge

Abstract

Disclosed is an automatic door closing hinge. Axle holes at two ends of adjacent hinge blades are rotatably connected via a fixed shaft and a rotating shaft respectively, the fixed shaft and the rotating shaft are 'T'-shaped and 'cross'-shaped respectively, a large-head column on the upper portion of the fixed shaft and a large-head column in the middle of the rotating shaft are respectively fixedly connected with the respective hinge blades, a torsional spring is arranged in an axle hole between the fixed shaft and the rotating shaft, two ends of the torsional spring are respectively fixedly connected with a small-head column on the lower portion of the fixed shaft and a small-head column on the upper portion of the rotating shaft, a small-head column on the lower portion of the rotating shaft is inserted in an axle hole of another hinge blade, a shell sleeve is arranged on the hinge blade corresponding to the small-head column on the lower portion of the rotating shaft, a plurality of resistance movable sheets and a plurality of resistance fixed sheets are distributed in a pairwise staggered manner, are in friction contact mutually and are sleeved on the small-head column on the lower portion of the rotating shaft, the resistance movable sheets can rotate along with the rotating shaft, and the resistance fixed sheets are limited and positioned by the shell sleeve. The automatic door closing hinge is low in production cost, long in service life, wide in application range and suitable to be mounted on a leftward opening door, a rightward opening door and a free door.

Description

【Technical field】 [0001] The invention relates to a hinge, in particular to a hinge that can automatically and slowly close a door (close the door). 【Background technique】 [0002] Hinge has been widely applied to the door of rotary opening and closing. In order to achieve automatic door closing, people have developed hinges that can automatically close the door, and there are two main types of automatic door closing hinges, one is fast closing, and the other is slow closing. The former is in the process of closing the door. It is easy to hurt people, and it is easy to damage the door frame, door leaf or door after a period of use, so people generally like to use hinges that close the door slowly. At present, the hinges of slow-closing doors are basically equipped with hydraulic cylinder structures in the hinges, and the hinges are slowly driven to rotate through hydraulic means to slowly close the door. This hydraulic cylinder-type automatic door-closing hinge has The fol...

AI Technical Summary

Problems solved by technology

[0003] 1. The structure is more complicated and the production cost is higher;

[0004] 2. Since the hydraulic oil is easy to freeze and solidify in the relatively cold northern regions, it is difficult to automatically close the door, so its application occasions are narrow;

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