The floor spring is a hydraulic door closer, but the device that compresses the spring is a worm gear instead of a rack and pinion.
Because the floor spring used for two-way door opening has to bear the weight of the door body, compared to door closers, the weight of the door body plays a decisive role in the choice of floor spring. In practical applications, the weight of the door leaf will generally not exceed, so the choice of door width and wind pressure on the floor spring model is the first choice. Also pay attention to the aspect ratio, that is, the ratio of height to width. If it is too disproportionate, the door leaf will not work properly. 1 From a manufacturing point of view, the worm gear structure of the floor spring makes the spring compression less than that of the rack and pinion drive door closer, and the force arm of the floor spring to close the door is also shorter, so the quality of the floor spring affects the structural design and processing accuracy The dependence is higher. In addition, since the two-way door leaf has a great force on the floor spring along the plane of the door leaf, the service life of the low-grade floor spring will be very different from that of the high-grade floor spring.