Linear units with toothed belt drive: LEZ 1/LEZ 2/LEZ 3/LEZ 9
Assembly instructions
Page 35
Assembling drive modules on LEZ 3
The diagram on the left clarifies assembly
of the drive module with direct drive on the
linear unit LEZ 3. Note that parts to be
connected must be free of swarf, rust and
dirt.
Secure the coupling flange (5) and the
spacer (4) to the linear unit with 4 cheese
head screws DIN 6912 8.8 M6x75 (7).
Now mount one half of the shaft coupling
(6) on the motor shaft. The torque for the
coupling clamp screws DIN 6912 8.8
M6x16 (3) is 3 Nm. Align the motor using
the 4 cheese head screws DIN 6912 8.8
M6x35 (8) and the matching washers/nuts
(2) so that the motor shaft and the linear
unit shaft (1) are flush with each other.
Now tighten the coupling clamp screw DIN
6912 8.8 M6x16 (3) on the gear shaft (1).
In the case of the LEZ 3, the drive module
is flanged on both sides.
Assembling drive modules on LEZ 9
The diagram on the left clarifies
assembly of the drive module with step-
down gears on the linear unit LEZ 9.
Note that parts to be connected must be
free of swarf, rust and dirt. Gears must
also have the same pitch as the toothed
belt.
The motor module (6) is to be secured to
the linear unit with 4 cheese head screws
DIN 6912 8.8 M6x16 (3). Place the
tensioning bushing (10) in the gear (7)
and fix this loosely with a countersunk
screw DIN 7991 8.8 M6x12 (4) so that it
can then be pushed onto the gear shaft
(11). Now assemble the toothed belt (8),
over the gear (7) and over the gear (9)
which is on the motor shaft (bonded
connection). The toothed belt must be
assembled manually without excessive
force. Now tension the toothed belt (8)
using the eccentric tension roller (5). The
belt prestressing is dependent on the power to be transferred and the drive specification. Owing to the
force transferred by the toothed belt, however, only slight prestressing is needed. W e recommend you
use eccentric tensioning rollers to set the prestressing or to correct tolerances. Then cover the step-
down gears with the cover (2) and both countersunk screws DIN 7991 8.8 M4x40 (10). In the case of
the LEZ 9, the drive module is flanged on both sides.