Page 22 - BPW axles with air suspension Series O SL AL
P. 22
BPW axles with air suspension
4.5.4 Struts / channel crossmember
Example of reinforcing a vehicle frame 1 1 CCrroossssmmeemmbbeerrss
that is subject to longitudinal torsion
(tilt trailers, curtainsiders etc.) with The transverse forces which arise during cornering
C-member. are absorbed within the C-member structure. The
frame end deformations occurring in vehicle frames
subject to torsion have to be absorbed by the frame
crossmembers. The crossmember should have suf-
ficient dimensions particularly (Wx).
Crossmembers with torsional flexibility and of ade-
quate bending values (Wx) should be used.
Torsionally stiff sections are to be avoided as cross-
members (risk of tearing at the welded connections).
2 2 GGuusssseett ppllaatteess
The transverse forces and frame end deformations
occurring during cornering are directed via the gus-
set plates into the C-member structure. In order to
ensure good adhesion with the frame, the gusset
plate must be extended to the top flange and weld-
ed onto the bottom and top flanges.
The preferred method of attachment to the C-mem-
ber is on the face end using a plug weld.
3 3 VVeerrttiiccaall pprrooffiilleess
If relatively thin main beam web profiles are used, a
vertical profile should be incorporated to reinforce
the frame in the region of the hanger bracket.
R Reemmaarrkkss::
With vehicle frames that are subject to torsion, an
elastic and torsional reinforcement of the air sus-
pension is necessary.
22 BPW-EA-Luft 1023701e
