Meyra iChair DYNAMIC 1.623, Руководство по техническому обслуживанию и ремонту, Страница: 32 / 48

32
VEHICLE SUSPENSION
Suspension of the chassis
The setting rings must fit securely with an unburdened
chassis.
For optimal sitting comfort the suspension (1)+(2) can be
adjusted according to the desire of the user.
☞
In doing so observe that both absorbers (1) and (2) have
different functions
Seat suspension
The absorber (1) with a hard spring and large spring rate
flexibly supports the drive rocker on the electric wheelchair
frame.
Support suspension
The absorber (2) with a soft spring and low spring rate flexi-
bly presses the support castors to the ground.
☞
The adjusted pre-tension of this spring has influence
on the stability and driving behaviour of the electric
wheelchair.
A low pre-tension in the spring enables comfortable driving
over obstacles and a good traction of the drive wheels, but
also permits a premature lift-off of the steering wheels, e.g.
when driving on inclinations.
A high pre-tension of spring stabilises the electric wheel-
chair, but reduces the „climbing ability“ at the edges of ob-
stacles and the traction of the drive wheels, especially when
driving slowly across transverse grooves and when driving
downhill.
☞
In the same way the stability and driving behaviour of
the electric wheelchair are influenced by the position of
the overall balance point to the drive axle.
3
1
2
a
b