RU1835008C - Planetary helix transmission - Google Patents

Description

is given to the cup 4, the rotation of which, due to the internal eccentric bore, causes the threaded nut 2 to run on the spindle 1, informing the latter of the translational movement

The forces appearing on the lead screw 1 during its movement are transmitted to the threaded nut 2, making a complex planetary movement and then through the thrust ball bearings 5 and 6 (in the case of the lead screw 1 moving upwards, the valves open) to the gear housing 8. In the thrust ball bearings 5 and 6, braking moments Mtr also occur. which are attached to the threaded nut 2 relative to the housing 8, and the efficiency of the mechanism in this case is defined as

M "I - 2 M

ivfex

tr

M

ex

.. 2 Mt., I

0.3 Mb

0.3

0

5

0

for example, at I 20, / 0.985.

Claims (1)

SUMMARY OF THE INVENTION A planetary screw drive comprising a housing, a threaded spindle disposed therein, a cup whose outer surface is concentric with the axis of the latter, a threaded nut eccentrically mounted on the threaded spindle, secured against radial movement by radial bearings, from axial, by thrust ball bearings, and located concentrically in the inner bore of the glass, characterized in that, in order to increase the efficiency, the threaded nut is installed directly in the housing by means of a stop ball bearings. 70