Flintec 52-05 - Manual (Page 2)

Basic function
The basic function of the rubber element is to prevent side forces from affecting
load cell performance and at the same time, to keep the load carrier in position.
The rubber element is not to be seen as a vibration damper although is has a
limited damping effect.
It’s sandwich design makes it stiff in vertical direction while relatively weak in
horizontal direction.
No side force = centred Side force acting
A side force acting on the load carrier will push the load carrier to the side and the
rubber element deforms(shears) as shown on the figure. When the side force has
disappeared, the spring action of the rubber will pull the load carrier back to
centred position.
Side forces/movements are created by external or internal reasons. External might
be a cart braking on the weigh platform. Internal might be thermal expansions or
expansions due to deflection under load.
For high side forces, it is necessary to stop the side movement of the load carrier
by an external stop in order to protect the rubber element.
Installation
For best scale performance the rubber elements in a scale shall be installed
accurately centred to the loading holes of the load cells. Below a number of
alternative installation methods are shown
Figure 1
Rubber element mounted directly to
load carrier, which has large clearance
holes to allow centring, even if holes are
not in exact position. Through bolts with
large washers on top.