The ground spring has two independent speed regulating valves that can adjust the speed independently. The speed can be divided into closing speed and locking speed. Generally, the range of closing speed is 90 to 20 degrees, and the locking speed is 20 to 0 degrees; The basic principle of speed adjustment is to slow down when entering the second speed rear door to avoid touching the heels of pedestrians.

1. The floor spring is also a hydraulic door closer, but its device for compressing the spring is a worm gear rather than a gear rack. Because of the worm gear

It can rotate in both directions, so the floor spring can be used for doors that open in both directions, while the door closer can only be used for doors that open in one direction.

2. The technical key of the ground spring is the load-bearing seat under the main shaft, which determines the load-bearing level of the ground spring. Because it is used for two-way door opening

The floor spring should bear the weight of the door body, and compared to the door closer, the weight of the door body plays a decisive role in the selection of the floor spring.

3. From a manufacturing perspective, the worm gear structure of the ground spring reduces the compression of the spring compared to the gear rack driven door closer

The force arm for closing the door is also short, so the quality of the ground spring depends more on structural design and machining accuracy.