What is Floor Spring?

The floor spring is a hydraulic door closer, except that the device that compresses the spring is a worm gear instead of a rack and pinion.
Because the floor spring used for the two-way door should bear the weight of the door body, compared with the door closer, the weight of the door body plays a decisive role in the selection of the floor spring. In practical applications, the weight of the door leaf is generally not too high, so the choice of door width and air pressure to the floor spring type is the first choice. In addition, 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. From the production point of view, the worm gear structure of the floor spring makes the compression degree of the spring smaller than that of the rack-and-pinion door closer, and the force arm of the floor spring to close the door is also shorter, so the quality of the floor spring depends on the structural design and machining accuracy. 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 greatly different from that of the high-grade floor spring.

The basic configuration of the floor spring is the sky axis and the ground axis (or the foot). The aerial shaft is an accessory that connects the door frame and the door leaf at the upper part. It consists of a bolt-type shaft fixed on the door leaf that can be adjusted with bolts and a shaft sleeve fixed on the door leaf. The vertical axis can be applied to almost all wooden, steel, aluminum alloy doors and frameless glass doors using glass door clips.

Installation method

A. Draw a line to make the center of the floor spring shaft coincide with the door clamp shaft. B. According to the manual and the actual object, open a hole on the ground. The size of the hole should be tightly matched with the floor spring shell and cannot be loosened. C. Put the floor spring into the opening Align it in the good hole. D. Lift the door leaf with the door clip installed, and insert the shaft of the floor spring into the shaft hole of the door leaf. E. Adjust the screws in three directions of the floor spring. Keep the door leaf vertical, and rotate the shaft up and down Coincidence. F. Adjust the speed of closing the door. G. Cover the floor spring The installation accuracy of the decorative cover floor spring has a great influence on its service life. The quality defects of the floor spring include: oil leakage from the body and eccentricity of the ground shaft. The oil leakage of the body is caused by the casting process of the floor spring. If the sand hole is caused during the casting process, the hydraulic pressure inside the body will increase after installation, which will cause oil leakage. The eccentricity of the ground axis can cause the door body to deviate from the centerline of the door leaf after installation. Although some quality defects can be compensated for by adjusting the position of the body, it is best to contact the manufacturer for replacement. The end of the service life of the floor spring is the oil leakage of the axis and the weakening of the elastic force. If the axis connection between the sky axis and the main shaft of the floor spring is not strictly vertical to the ground, the movement of the door leaf will bring great torsion to the floor spring, increasing the main shaft. Wear between the bearing and the bearing will eventually lead to oil leakage from the shaft. The elastic force of the spring will inevitably weaken after a long-term stretching exercise.