Vehicle suspension stabilising arrangement
A stabilizing arrangement ( 100 ) characterized by a mounting member ( 32 ), at least one forward truck ( 34 ) supporting a forward pair of surface engaging members ( 36 ), and at least one rear truck ( 38 ) supporting a rear pair of surface engaging members ( 40 ), each truck ( 34, 38 ) allowing biased rotation about a central axis thereof, the forward truck ( 34 ) being mounted on the mounting member ( 32 ) such that it projects forwardly thereof and the rear truck ( 38 ) being mounted on the mounting member ( 32 ) such that it projects rearwardly thereof, and whereby the mounting member ( 32 ) is supported substantially between the trucks ( 34, 38 ) and pairs of surface engaging members ( 36, 40 ). A suspension and steering arrangement is also provided.
1. A stabilising arrangement comprising:
a mounting member,
at least one forward truck supporting a forward pair of surface engaging members, and
at least one rear truck supporting a rear pair of surface engaging members,
each truck being biasedly rotatable about a central axis thereof with respect to the mounting member, the forward truck being mounted on the mounting member such that it extends forwardly therefrom and the rear truck being mounted on the mounting member such that it extends rearwardly therefrom, the mounting member being supported substantially between the trucks and pairs of surface engaging members, whereby rotation of the mounting member with respect to its longitudinal axis is accommodated by relative movement of each truck about the central axis,
wherein a steering member is connected to the mounting member for turning the mounting member about an axis substantially perpendicular to a surface engaged by the surface engaging members.
2. A stabilising arrangement according to claim 1 , wherein the mounting of the trucks to the mounting member is such that the central axis of rotation of at least one of the trucks is inclined from the horizontal as defined by the mounting member.
3. A stabilising arrangement according to claim 2 , wherein both trucks are inclined in this manner.
4. A stabilising arrangement according to claim 2 , wherein the inclination of the or each truck is about 8°.
5. A stabilising arrangement according to claim 1 , wherein the forward and rear pairs of surface engaging members are spread at least about 150 mm apart.
6. A stabilising arrangement according to claim 1 , wherein an intermediate member is attached to the mounting member in a pivotal manner whereby a force acting toward the stabilising arrangement is supported thereby.
7. A stabilising arrangement according to claim 6 , wherein the intermediate member is also fixed to another member by way of a resiliently biased parallelogram link.
8. A suspension and steering arrangement according to claim 1 , wherein the steering member is further adapted to rotate the mounting member about its longitudinal axis.
9. A suspension and steering arrangement for a vehicle, the suspension and steering arrangement comprising:
a mounting member,
at least one forward truck supporting a forward wheel pair, and
at least one rear truck supporting a rear wheel pair,
each truck being biasedly rotatable about a central axis thereof with respect to the mounting member, the forward truck being mounted on the mounting member such that it extends forwardly therefrom and the rear truck being mounted on the mounting member such that it extends rearwardly therefrom, the mounting member being supported substantially between the trucks and wheel pairs, whereby rotation of the mounting member with respect to its longitudinal axis is accommodated by relative movement of each truck about the central axis,
wherein a steering member is connected to the mounting member for turning the mounting member about an axis substantially perpendicular to a surface engaged by the surface engaging members.
10. A suspension and steering arrangement according to claim 9 , wherein the mounting member is arranged to be pivotally connected to a means for steering a conveyance on which the suspension and steering arrangement is provided.
11. A suspension and steering arrangement according to claim 9 , wherein a flexibly resilient biasing means is provided such that the forward wheels are biased upwardly, and the rear wheels downwardly.
12. A suspension and steering arrangement according to claim 11 , wherein the flexibly resilient biasing means is provided in the form of a spring made of a polymeric material.
13. A suspension and steering arrangement according to claim 9 , wherein the mounting of the trucks to the mounting member is such that the central axis of rotation of at least one of the trucks is inclined from the horizontal as defined by the mounting member.
14. A suspension and steering arrangement according to claim 9 , wherein the steering member is further adapted to rotate the mounting member abouts its longitudinal axis.