Unimog U500, Инструкция по монтажу

Страница: 67 / 292

Body and Implement Mounting Guidelines U500 North America Implement / Body Installation
Page 70 of
294
August 2005
4.7 Coordinate systems
One significant advantage of CAD technology is that it enables the
vehicle to be measured in the form of coordinates. This limits the de-
termination of relative dimensions, which previously required the de-
termination of all individual part dimensions, to the addition or sub-
traction of spatial vectors or "direct measurement" in the CAD sys-
tem. The determination of specific points (for example the center of
the steering wheel or eye level) in the form of coordinates is signifi-
cantly easier than relative dimensioning.
Vehicle system
The following definition of chassis coordinates applies to all UNIMOG
vehicles:
x axis: Longitudinal axis with positive direction against the
direction of travel
y axis: Transverse axis with positive direction to the right side
of the vehicle
z axis: Vertical axis with positive direction to the top
Definition of the chassis coordinate system
The origin of the vehicle coordinates for the U500 NA is:
X = 0 Center front axle (longitudinal member front edge x = -
930)
Y = 0 Center chassis frame
Z = 0 0.157 in / 4 mm above the lower edge of the longitudi-
nal member
Note: Dimensions are mostly CAD data and partially not
rounded. So all measures are construction dimensions
without tolerance indication.
z
z
x
x
y
y
Figure 4.7: Unimog frame with the zero point of the coordinate system
z
x
Figure 4.8: Detail drawing of zero point
See also detail drawing added in each vehicle drawing. Drawings of
the U500 NA are available on the Unimog Resource CD or by the Un-
imog Implement Manager listed at the beginning of this guideline.