Planetary gear system, planetary differential and gear system with the planetary differential
View Patent ↗A planetary gear system having at least two planetary steps, each of which is made up of at least one set of planets and one sun, whereby the teeth of the gearwheels in the planetary drive mesh with each other in such a way that, in each of the meshing points, at least one first tooth on a first toothing of first teeth positively engages into a tooth gap of a second toothing of second teeth. First teeth of the first toothing have a tooth flank profile concavely arched, and second teeth of the second toothing have a tooth flank profile convexly arched, so that the tooth flanks in contact with each other are arched in the same directions, at least when in contact.
1. A planetary differential comprising;
a planetary gear system including at least two planetary steps, each planetary step including at least one set of planets and one sun, teeth of gearwheels in the planetary gear system meshing with each other in at meshing points in such a way that, in each of the meshing points, at least one first tooth on a first toothing of first teeth positively engages into a tooth gap of a second toothing of second teeth, a first flank of the first tooth touching at least a second flank of a second tooth of the second toothing that delimits one side of the tooth gap on the second toothing in at least one point of tooth contact, the first teeth of the first toothing having a tooth flank profile that, as seen in the cross section through the toothing when the teeth mesh, is concavely arched, and in that the second teeth of the second toothing have a tooth flank profile convexly arched in the same cross section, so that the tooth flanks of the first tooth and of the second tooth, which are in contact with each other, are arched in the same directions, at least when they are in contact with each other; and
at least one planet carrier, the planetary gear system including a first set of planets and a second set of planets, whereby the firsts and second sets of planets are each rotatably mounted on the planet carrier, as well as a first sun and a second sun which are each operationally connected to a driven shaft of the planetary differential, and the planets of the first set, together with the first sun, form a first planetary step, and thereby they mesh with the teeth of the first sun, the planets of the second set, together with the second sun, forming a second planetary step, and thereby they mesh with the teeth of the second sun, and whereby the teeth of each of the planets of the first set mesh with the teeth of one of the planets of the second set, the planetary gear system having at least a third planetary step including a third set of planets whose teeth mesh with the teeth of a third sun, the planet carrier drivable via the third planetary step, and whereby the planetary gears of the third set are rotatably mounted on the planet carrier.
2. The gear system as recited in claim 1 wherein the third planetary step has at least one gearwheel of the gearwheels with the first toothing and at least one gearwheel of the gearwheels with the second toothing.
3. The gear system as recited in claim 2 wherein the first planetary step and the second planetary step have at least one gearwheel of the gearwheels with the first toothing and at least one gearwheel of the gearwheels with the second toothing.