When the main vehicle and the trailer form the train to make a turn, in order to make all the wheels roll purely, the axes of all the wheels must intersect at one point, which is called the instantaneous rolling center. The steering center of a wheel-steering three-axle vehicle always moves backward relative to the center of the double rear axle, and the amount of rearward movement, in the formula, l is the center distance between the middle and rear axles, and L is the center distance from the front axle to the middle and rear axles.
l=1100 L=3740
then the amount of backward shift
1. Trailer chassis calculation:
Attachment 1
Drawbar rotation angle θ=38°
Kingpin center distance EF=1678
Wheelbase HG=3800
Front wheel base l (wheel)=1800
DH=1050
Substitute into the calculation:
OG=DG ctgθ=(1050+3800) ctg38°=6207
α=arctg[3800÷(6207+1678÷2)]=28.33°
β=arctg[3800÷(6207-1678÷2)]=35.29°
OF=3800÷sinα=8107
Trailer Chassis Turning Radius
R'=OF+(l-EF)÷2=8107+(1800-1727)÷2=8143.5
1. Main car calculation:
Corresponding to the turning radius that the main vehicle EQ2082E6D should achieve:
Tail suspension CK=895 L=3740 a=81
Front wheelbase l (main) = 1774 l (middle and rear wheelbase) = 1100
Substitute into the calculation:
OD=(HG+DH)÷sinθ=(3850+1050)÷sin38°=7959
OC2=OD2+CD2=79592+15302
OC=8104
OB2=OC2-CB2=81042-(895+1100÷2-81)2
OB=7988
R(main)2≈ON2≈［OB+l(wheel)÷2］2+［L+a］2
=[7988+1774÷2]2+[3740+81]2
R(main) ≈9662mm＞8200
The turning radius of the trailer chassis does not match the turning radius of the main vehicle EQ2082E6D, and the turning radius of the main vehicle needs to be adjusted to match.
The above is the calculation method of the trailer radius.
