Effect of Pantograph’s Main Structure on the Contact Quality in High-Speed Railway

Table 3

Initial size parameters.

Items	Description	Reference value	Range
L1	Length of the link	1.18 m	1–15% to 1 + 15%
L2	Length of the upper frame	2.21 m
L4	Length of the lower frame	1.6 m
L5	Length between O2 and O5	0.29 m
θ5	Angle between L5 and L2	12.83°
La	Distance between O1 and O4 along x1 direction	0.72 m
Lb	Distance between O1 and O4 along y1 direction	0.15 m