The topic request is to make the 2 shaft axial force is small, the blue is the analysis I have been out of the analysis, how does red. There is also how to judge the rotating helical gear (left, right), not the direction of rotation.The direction of the helix of the gear 3 depends on what is the direction of rotation, the axial force, or what. In the diagram, the gear 3 is a left-handed helix, and that can be replaced by a right-handed spiral
The rotation of the gear 4 is opposite to the 3 one (both of which are engaged)Determination of the rotation of helical gears:Right hand rule: left hand, right hand, right handThumb and axial overlap, four refers to the rising direction of the teeth, the left hand in line with the left hand, the right hand is right (always the back of the hand toward himself)
In the figure, the axial force of 3 is opposite to the 2 axial force, so that it can counteract the axial force of the bearing (otherwise, the two will be the same, and the bearing will bear great axial pressure)
The rotation of the gear 2 is opposite to the gear 1 (both Xiang Niehe)The rotation of the gear 3 is determined according to the smaller axial force of the 2 axis in the title,
