Automatic Bollards as a top-of-the-line traffic safety tool in protective settings, due to the complex internal structure makes his price high, its working principle should be based on different types of analysis, fully automatic divided into electric Retractable Bollards and hydraulic Retractable Bollards .
Automatic Bollards are mainly driven by pneumatic and electromechanical ones inside the column. The main accessories are electric gas springs and power motors. The combination of electric gas springs and power motors can control the drawbars to drive the cylinders after power on. The advantage of this design lies in its simplicity. The control method can be changed to achieve lifting and lowering the product cost.
The hydraulic pressure is more complicated than that of the electric motor, and its accessories are also many. The internal hydraulic and electromechanical ones adopt the intracavity hydraulic technology to realize one-piece sealing. After the pressure oil enters the oil inlet chamber of the motor through the oil distribution shaft, it enters the top of the corresponding piston cylinder through the groove of the barrier-free lifting platform, and the hydraulic force FN acting on the plunger is applied to the center of the eccentric wheel through the connecting rod. Its tangential force F. A torque T is formed on the center of rotation of the crankshaft so that the crankshaft rotates counterclockwise. Because the positions of the three plunger cylinders are different, the magnitude of the generated torque is also different.
The total torque output by the crankshaft is equal to the sum of the torque generated by the plunger in communication with the high pressure chamber. At this time, the plunger cylinder 45 communicates with the oil discharge chamber, and the oil flows back to the fuel tank through the oil distribution shaft. When the crankshaft rotates, the oil distribution shaft rotates synchronously. Therefore, the state of the oil distribution constantly changes so as to ensure that the crankshaft will continuously rotate. If the inlet and outlet are interchanged, the hydraulic motor is reversed and the process is the same as above. This design feature is that the lifting process is stable and the lifting time can be controlled by the circuit board. The force is relatively large. The automatic hydraulic Retractable Bollards are mostly used in counter-terrorism regions, national governments, bank entrances, and prisons.