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Suspension system for anti-roll bar

IP.com Disclosure Number: IPCOM000171682D
Publication Date: 2008-Jun-16
Document File: 41 page(s) / 4M

Publishing Venue

The IP.com Prior Art Database

Related People

Magnus Johansson: CONTACT

Abstract

According to the invention a suspension system for attaching a driver's cabin frame (1) to a frame (3) of a vehicle and a method for mounting the same are provided, wherein the system comprises an anti-roll bar including a torsion bar (9), a bushing (15) and means for connecting the bushing (15) to said torsion bar (9), wherein said means include a bolt (17) to be inserted through said bushing (15) and inner securing means (35, 45) arranged to receive a first end portion (37) of the bolt (17), characterised in that said inner securing means (35, 45) are arranged to have a first position relative to the bushing (15) where the inner securing means (35, 45) are arranged and adapted to be attached to a first end portion (37) of the bolt (17) and a second position relative to the bushing (15) where the attached inner securing means (35, 45) are able to rotate relative to the torsion bar (9) and secure the bolt (17) against a release.

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Page 1 of 41

Suspension system for anti-roll bar

The present invention relates to a suspension system for at-
taching a driver's cabin frame to a frame of a vehicle and a
method for mounting the same, wherein the system comprises an
anti-roll bar including a torsion bar, a bushing and means for
connecting the bushing to said torsion bar, wherein said means
include a bolt to be inserted through said bushing and inner
securing means arranged to receive a first end portion of the
bolt.

Heavy vehicles, e.g. trucks, often have a driver's cabin which is
spring-mounted to the vehicle's frame at three or four different
points. The rear edge of the cabin may be suspended, for exam-
ple, by an air spring arrangement of a known kind. The front
edge of the cabin of such vehicles is often provided with an
anti-roll bar whose purpose is to damp out the various kinds of
bumping movements which may occur at the various suspension
points. Especially, heeling movements of the driver's cabin dur-
ing cornering of the vehicle is reduced by the anti-roll bar
suspension.

A forward anti-roll bar usually comprises a one-piece transverse
torsion bar which has at each of its axial ends a link arm di-
rected in the longitudinal direction of the vehicle. Each link
arm is directly or indirectly supported by the cabin at one end
and by the frame of the vehicle at the other end. A vertical
movement of the spring-mounted driver's cabin is therefore trans-
ferred to a rotational movement of the torsion bar.

Such a suspension system is already known from WO 2006/110050.
The suspension system described therein is directed to the
problem that in traditional versions of anti-roll bars it is
necessary to dismantle the whole anti-roll bar if, for exam-
ple, the radiator of a truck needs to be removed for cleaning,

Page 2 of 41

- 2 -

or if it is necessary to replace the anti-roll bar's bearing
units. This will require the use of a transverse crane for
suspension of the driver's cabin. This is an extremely cumber-
some and expensive solution. In the light of this, a need has
arisen for anti-roll bars which are designed with modular so-
lutions. It should therefore be possible to dismantle parts of
the anti roll bar such as the torsion bar or the bearings
without the need to remove the whole anti-roll bar from the
vehicle.

In WO 2006/110050 this problem is solved by providing an anti-
roll bar and a method of dismantling and mounting the same,
wherein each arm of the anti-roll bar is fixed to the torsion
bar by means of at least one attachment device which is posi-
tioned in a through-going passage in each arm, the attachment
device's end portion being housed in a bore in the torsion
bar. The attachment device is preferably a bolt that is in-
serted through a bushing and screwed into a coaxial threaded
bore at an axial end in the torsion bar or at a portion of the
link arm it is connected to.

It is disadvan...