Table 2: Contact surface parameters.

Contact position

Driving wheel and pin row3.5 × 1097.2 × 1050.210.18
Plane support plates and middle trough end face1.34 × 10112.6 × 1060.210.18
Guiding support plates and upper contact surface of the pin row8.2 × 10101.25 × 1060.210.18
Guiding support plates and lower contact surface of the pin row4.2 × 10106.2 × 1050.210.18
Guiding support plates and left contact surface of the pin row7.5 × 10101.01 × 1060.210.18
Guiding support plates and right contact surface of the pin row1.02 × 10112.15 × 1060.210.18