Automatic door lock hardware accessories refer to alloy components made by manual service production and processing, such as door closer, ground spring, hinge, bolt, etc., which are widely used in solid wood doors, glass sliding doors, aluminum doors, etc. Automatic door hardware accessories are an extremely important daily hardware products in our lives, specifically, floor springs and door closers. They are usually used in large shopping malls, office buildings, residential buildings, museums and other public places where workers frequently come in and out. Its key role is to ensure that the door can maintain a normally open working state or can be immediately and accurately closed to the original position after being opened.
Normally, the door closer has the function of automatically closing the system to ensure that the door can be automatically closed after being opened. However, it can also be added with a positioner. When the door is completely opened, it cannot be automatically closed.
The ground spring also has the function of automatic closing of the system. Generally, it cannot be automatically closed after it is completely opened; In case of incomplete opening, ensure that it can be automatically closed. Once it is required to open completely or not, the automatic closing function must be ensured, so that the ground spring without accurate positioning can be selected.
Door closer
The key to the idea of the door closer design scheme depends on the completion of the control of the closing operation process, so that multiple action indicators of the closing operation process can be adjusted according to the needs of people. The function of the door closer is not only to automatically close the door, but also to protect the door frame and the door body. What's more, the door closer has become another part of the intelligent management of contemporary buildings that cannot be ignored.
The most important product quality problem of the door closer is oil leakage. Since the door closer completely uses its internal hydraulic system to control the whole process of closing the door, the oil leakage represents the failure of the hydraulic system, so the hydraulic system is the only standard that depends on the service life of the door closer. The key reason for oil leakage is that the sealing effect of bearing transmission device is reduced due to the clearance caused by wear. Therefore, the quality and precision of materials, heat treatment and machining of bearing transmission devices are the core of the problem. In fact, the quality of door and window hardware and even all building hardware accessories is related to the basic industrial production level of the place of origin. There are two kinds of door closer shells: cast aluminum and cast iron. The size, total number and post production of sand holes in shell blanks are subjective factors affecting the quality of door closer.
Ground spring
The ground spring refers to a kind of hydraulic door closer, but its clamping spring is the worm gear rather than the rack. Since the worm gear can rotate in both directions, the ground spring can be used for doors that open in both directions, while the door closer must be used for doors that open in one side. The important technical application of the ground spring is the load seat under the main shaft bearing, which measures the load level of the ground spring.
The basic hardware configuration of the ground spring is the sky axis and the ground axis (or the foot). The crown shaft is a spare part connecting the door frame and the door frame at the upper end, which is composed of a pin type shaft that is fixed on the door frame and can be adjusted with bolts and another shaft sleeve placed on the door frame. The sky axis and the earth axis can also be used for almost all wood, steel, aluminum alloy doors and windows and frameless glass doors with glass door clips.
The installation accuracy of the ground spring has a great influence on its warranty period. The reason is that the end of the warranty period of the ground spring is oil leakage. If the axis of the sky shaft and the ground spring main shaft bearing is not strictly perpendicular to the ground, the movement of the door leaf will bring huge torque to the ground spring, expand the damage between the main shaft bearing and the bearing, and finally cause oil leakage.