WTJ5080JKT passenger boarding ladder is composed of upper ladder assembly, lower ladder assembly, second class chassis, frame assembly, platform assembly, fine tuning mechanism, hydraulic system and electrical system.
1. Boarding stairs
The boarding ladder is composed of fixed ladder, movable ladder and turning tail ladder. The cover plate of the ladder body adopts advanced prestressing technology, and the appearance is smooth.
A. Fixed ladder
The fixed ladder assembly is mainly composed of ladder frame, ladder side plate, handrail, roller assembly and step.
b, mobile ladder
The movable ladder is mainly composed of a ladder frame, a ladder side plate, a handrail, a roller assembly and a step. A wedge plate is fixed under the ladder body skeleton, and the tip of the wedge plate is at the upper end of the elevator and is placed on the roller of the fine-tuning mechanism. When working, the expansion and expansion of the lifting cylinder is realized by the expansion and expansion of the lifting cylinder. Due to the role of the wedge plate, the automatic adjustment of the Angle between the ladder body and the ground is realized when the lifting cylinder is working and the lifting ladder is expanding and expanding, and the operation is simple and convenient.
c. Turn over the tail ladder
The turnabout tail ladder is a one-stage tail ladder, which is mainly set for increasing the departure Angle during transportation and adopts manual turnabout. The skeleton material of the inverted tail ladder is 4mm welded steel plate, which is installed with 4mm thick patterned aluminum plate, and the number of steps is 1. The upper end of the tail ladder and the upper ladder body are connected with a pin shaft to realize the flip.
The chassis is modified by the second class chassis of Qingling, and its structural performance can be used and maintained by referring to the operation manual of the second class chassis of Qingling.
3. Frame assembly
The bottom frame is composed of the auxiliary longitudinal beam, the ladder body support beam, the hydraulic support foot, the hydraulic oil tank and other accessories installed on the car longitudinal beam, and there are 6 supporting legs before and after
4. Tooth assembly
The main function of the tooth assembly is to stabilize the up and down movement of the upper ladder assembly, and at the same time, it can effectively lock the upper ladder assembly. The roller assembly at the front end of the tooth is installed in the track of the upper ladder assembly, and the rear end is fixed on the lower ladder assembly. When the upper ladder assembly is stretched back and forth, the tooth assembly also moves with the upper ladder assembly.
5. Boarding platform
The boarding platform is a part directly in contact with the aircraft, which is composed of a fixed platform, a telescopic platform, a sliding side door and a telescopic cylinder, and is rigidly connected with the upper part of the lift. In order to ensure the safety of the platform near the aircraft, the electric limit switch is installed at the front of the platform, so that the platform can stop automatically and reliably when it is near the ideal position of the aircraft. The telescopic platform can swing left and right, and the error between the platform and the door can be automatically adjusted when the passenger ladder car is not perpendicular to the aircraft door. The sliding side door is used to adjust the space caused by the expansion of the expansion platform. The sliding side door is fixed by mechanical positioning locking structure, which has the characteristics of easy locking, easy opening, safe and reliable.
6. Fine-tuning mechanism
The trimming mechanism is composed of a diagonal strut, an upper/lower bracket, a roller assembly and a trimming cylinder, etc. The roller is installed on both sides of the top of the expansion bracket. When the docking height between the boarding platform of the passenger ladder car and the aircraft door is different, the fine-tuning cylinder working telescopic bracket will raise the ladder platform, so that the boarding platform of the passenger ladder car and the height of the aircraft door are the same.
7. Awning (optional)
Awning can be optional according to customer requirements. The awning assembly is mainly composed of an upper ladder awning, a lower ladder awning and a platform awning.