Page 30 - BPW axles with air suspension Series O SL AL

BPW axles with air suspension

6.3 Air bag at frame centre (in-line)

W Wiitthhoouutt ssppaacceerr
When installing air bags without a spacer at frame
centre (V = 0 or V = 20), the bottom flange of the
vehicle frame should be drilled to accommodate
M 12 bolt (Fig. 1).
The air bag top plate support area should be at
least 140 x 200 mm (BPW 30). If the frame width is
less than 140 mm, a standard plate can be installed
between the frame and the air bag top plate. If
the lower member thickness exceeds 22 mm,
shaft nuts with spring washers are to be used. Drill
hole Ø 21 mm (Fig. 2).

W Wiitthh ssppaacceerr

The spacer is welded to the frame bottom flange.
The air bag top plate can then be bolted to the
spacer.
The spacer dimension can be seen in the technical
documentation.

G Geenneerraall

With air bags at frame centre, air bag offset V = 0,
there are no generated bending forces, and only
minor bending forces with air bag offset V = 20.

The necessary unrestricted motion of the air bag is
to be ensured when determining the design and air
bag offset.

SP = Track on the ground
FM = Trailing arm centre
BM = Air bag centre
D = Air bag diameter
(∅ 300 with BPW 30, 30 K)
V= Air bag offset
(0; 20 mm as per design )
B = Tyre width
(consider wheel rim width )
MA = Distance between wheel rim centres

* 30 mm is minimum dimension
R Reemmaarrkkss::

The gap between the air bag and tyres or brake
cylinder should be at least 30 mm with the maxi-
mum air bag diameter.

30 BPW-EA-Luft 1023701e