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The principle and characteristics of slow-drop damping door hinge

The freezer door is a relatively important structural component in the freezer. The upper and lower brackets are connected by rivet movable pins and push rods, which can be opened by pushing. The movable pins of ordinary refrigerator doors and the sliding blocks connected to the movable pins fixed on the top of the push rod are made of iron, which will produce harsh sounds when rubbing against each other during use. After long-term use, the noise will be more obvious, which will affect the experience of use. At the same time, although the large freezer door can be closed by itself when it is opened below 45 degrees, due to the free fall, the freezer door will directly hit the cabinet frame when it falls, resulting in a large impact sound, and it is also easy to damage the freezer door and The cabinet may even hurt the user’s palm, which poses a certain safety hazard; whether it can be lowered slowly below 45 degrees will affect its scope of application, stability and safety of use to a certain extent. Therefore, there is a kind of slow-drop damping door hinge that is noiseless and can be lowered slowly when the door is closed below 45 degrees, without impact sound, and without smashing hands.

Noise-free slow-drop damping door hinge, including upper and lower brackets, on the inner side of the sliding sheet connected with the movable pin at the top of the push rod of the lower bracket, a nylon tile is provided, and the thickness of the nylon tile is 1 mm. The nylon tile is connected, there will be no harsh noise. After 100,000 opening and closing tests of the freezer door, the nylon tile is not broken, and only slightly worn by 0.3 mm, and the thickness is still 0.7 mm. The test result is pass. At the same time, a group of two connected torsion springs are sleeved on the outside of the rivets connecting the upper and lower brackets, and one punching bubble point is arranged on the left and right sides of the inner side of the lower bracket.

When the door is lowered to 30 degrees, the two bottom ends of the torsion spring are stuck on the rails of the lower bracket to generate torsion force. When the door is lowered to 15 degrees and the two bubble points on the left and right sides of the lower bracket, the Torsional force, so that when the refrigerator door is below 45 degrees, the impact force is offset by the reaction force generated by the set torsion spring, so it will not fall freely, so that the cabinet door can be lowered slowly when the temperature is below 45 degrees, and there is no impact sound. and avoid smashing hands.

Post time: Jul-22-2022