Pick it up, take it to the top and put it down, and fix it where you can let go.
The mechanical principle of the handrail of the passenger car: there is a slope-shaped iron block, which moves upwards. After the slope to the head, it will get stuck on the edge and then pull up. The following linkage mechanism will push the iron block of the slope down. Then the armrest can go down.
Passenger cars can be divided into bicycles and trains according to the overall structure. Bicycles are basic models. They are usually divided into large, medium and small according to the total weight of passenger cars or the number of seats. The length of individual passenger cars in China is generally not more than 12 meters.
The carriage and frame of the passenger train are divided into two sections. The two carriages are connected by hinged discs. The two compartments are connected by movable pleats to make the carriages communicate with each other. Therefore, they are also called articulated or channel passenger cars.
China stipulates that the length of passenger trains generally does not exceed 18 meters. Passenger vehicles use hydraulic automatic transmissions to improve driving comfort; eddy current retarders are used to improve braking safety; CAN bus layout technology is used to improve various vehicle layouts.
