Swing In Pneumatic Bus Door System-QN

Swing In Pneumatic  Bus Door System  (QN) for City bus is the bus door control system mainly used as the transit bus door . with reasonalble structure, beautiful shape, easy to install, door opening and closing more safety and relaible. 

FEATURES:

Beautiful and neat appearance

Smooth, rapid operation

Limited protrusion outside of vehicle

Door panels may be flat or moderately contoured

Clear passenger path

PARAMETERS:

The main parameters about swing in Pneumatic  bus door system / mechanism

Operation Temperature: -40° C - 80° C

Operation Pressure: 90-125 psi

Operation Voltage: DC12V or DC24V

Door Life Cycle times:1, 000, 000

Door closing or opening time: 3-5 seconds

Door opening way: swing in 

Door panel: Single or Double Swing in panel

Bus door mechanism structure: shaft and arm install inside of the bus body or outside of bus body.

Bus door panel: bus door panel with brush or bus door panel with dropflap

AAnti-clamping:Air bag anti-clamping and electric anti-clamping 

WORKING PRINCIPLE 

This swing in peumatic  bus door mechanism uses a pneumatic cylinder to realize close and open actions of bus door through a single piston rod and a crankpin system. Each bus door panel is controlled by the separate cylinder; the bus door swinging speed could be adjusted; the bus door is also equipped with cushioning function during bus door opening and anti-clamp function during bus door closing.

The movements of the cylinder are controlled by solenoid valve, which could easily change its working conditions when the power is on. When the bus door is under opening or closing conditions, it is unnecessary to supply the power for the solenoid valve.

During closing action of door, if bus door movement is interrupted by somebody or something, the control box shall work to change the working condition of solenoid valve to open the door.

For the low floor city bus, usually adpot the Swing in Pnuematic bus door system (QN) ,equipped with 176 BRT BUS DOOR LOCK.