Door closer
A technology for door closers and gates, which is applied to door/window accessories, switches with braking devices, buildings, etc. It can solve the problems of large force loss, inconvenient force adjustment, and affect the appearance, and achieve less force loss and strong force. Adjust the effect easily
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[0033] The cylinder (1) filled with hydraulic oil containing a small amount of air is equipped with a spring (5), a spring guide (4), a piston (2), and a piston connecting rod (3), forming a speed adjustment on the edge of both sides of the cylinder. Screws (6a) (6b), one end of the cylinder is provided with a door frame fixing device (8), and the other side end is provided with a door fixing device (9) through the piston connecting rod (3). And, the force adjustment nut (7) is installed between the door fixture (9) and the piston connecting rod.
[0034] Hereinafter, it will describe in detail with reference to drawings. In the present invention, the door frame fixing device (8) for installing an additional support frame (8a) is arranged at the end of one side of the cylinder (1) as required. A ball (2b) is provided inside the cylinder (1), and a piston (2) and a spring guide (4) and a spring (5) formed by forming the hole (2a) attached to the tongue rod (2a') are built in, ...
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