DE102015009070A1 - Gearbox, series of gearboxes and method of manufacture - Google Patents

Abstract

Transmission, series of transmissions and methods of manufacture comprising a housing, a planet carrier, planetary gears, a ring gear with internal teeth and a sun gear,
wherein the planetary gears are rotatably mounted on the planet carrier about a respective axis of rotation,
each planet gear meshing with the internal teeth of the ring gear and the sun gear,
characterized in that
the planetary gears are arranged around a rotation axis of the sun gear and are unevenly spaced from each other in the circumferential direction of the rotation axis of the sun gear.

Description

The invention relates to a transmission, a series of gearboxes and a method for the production.

From the DE 101 60 685 A1 is known a planetary gear.

The invention is therefore the object of developing a transmission, a series of gearboxes and a method for manufacturing, with environmental protection to be improved.

According to the invention the object is achieved in the transmission according to the features indicated in claim 1, in the series according to the features indicated in claim 12 and in the method for production according to the features indicated in claim 15.

Important features of the invention in the transmission, comprising a housing, a planet, planetary gears, a ring gear with an internal gear and a sun gear, wherein the planetary gears are rotatably mounted on the planet carrier about a respective axis of rotation, each planetary gear with the internal teeth of the ring gear and the sun wheel is engaged,
are that
the planetary gears are arranged around a rotation axis of the sun gear and are unevenly spaced from each other in the circumferential direction of the rotation axis of the sun gear.

The advantage here is that the teeth of the planetary gears at different times from the single intervention area to the double intervention area pass. This transitional time is associated with increased vibration excitation and noise. The uneven arrangement of the planetary gears causes a temporal equalization, since each planetary gear at a different time from the single-engagement area to the dual-engagement area passes. Thus, the vibration excitation and noise is reduced. Environmental protection is improved.

In an advantageous embodiment, at least two circumferential angle spacings between two planetary gears closest to one another in the circumferential direction of the rotational axis of the sun gear have different values. The advantage here is that the course of the average stiffness of the transmission is improved. Thus, the durability of the transmission is improved.

In an advantageous embodiment, the circumferential angular distance of a planetary gear to the next planetary gear in the circumferential direction and the circumferential angular distance of this planetary gear to the next planetary gear opposite to the circumferential direction are equal. The advantage here is that with a gear set different gear ratios can be generated by means of a suitable choice of the position of the planetary gears. In this case, integer ratio ratios can advantageously be generated: i3, i4, i5, i7 and i10.

In an advantageous embodiment, the axes of rotation of the planetary gears are arranged mirror-symmetrically to a plane, wherein the axis of rotation of the sun gear lies completely in this plane. The advantage here is that the imbalance of the transmission can be reduced compared to a transmission with completely irregularly arranged planetary gears. At the same time the vibration excitation and noise is reduced, since only a maximum of half of the gears is at the same time in the transition from the single intervention area to the double intervention area. Advantageously, in particular with an even number of teeth in the ring gear, the vibration excitation and noise development can be reduced.

In an advantageous embodiment, the planet gears identical teeth and an identical diameter, in particular, are identical. The advantage here is that the number of different components, so the component variance is reduced. As a result, the storage is reduced and the environment is improved.

In an advantageous embodiment, each circumferential angular distance between two adjacent planetary gears deviates by less than 5 ° from the circumferential angular distance between two adjacent planetary gears of an arrangement with equally circumferentially spaced planetary gears, in particular less than 2 °, in particular between 1 ° and 2 ° or less as 1 °. The advantage here is that the imbalance of the transmission, in particular of the planetary gear carrier provided with the planetary gear, can be reduced compared to a transmission with strong deviations of the circumferential angular distance of the planet gears of the evenly spaced arrangement of the planetary gears. Thus, an additional balance weight on the planet carrier can be saved.

In an advantageous embodiment, the transmission has three or more planet gears. The advantage here is that the transmission is suitable for high torques.

In an advantageous embodiment, all axes of rotation are arranged axially parallel to each other. The advantage here is that the transmission is executable as a precision gear.

In an advantageous embodiment, each of the axes of rotation of the planet gears is arranged at the same distance from the axis of rotation of the sun gear. The advantage here is that the load is evenly distributed to all planetary gears. Thus, the load capacity of the transmission is improved.

In an advantageous embodiment, the planet carrier has a receiving device for a balance weight, in particular by means of a balance weight with the planet carrier is connectable. The advantage here is that the transmission is balanced by means of the balance weight. Advantageously, the balance weight is releasably connected to the planet carrier, so that the planet carrier can be used with or without balance weight.

In an advantageous embodiment, a balance weight is received in the receiving device of the planet carrier. The advantage here is that the concentricity of the transmission can be improved. Thus, the wear and noise in the transmission can be reduced. Environmental protection is improved.

In an advantageous embodiment, the balance weight in the circumferential direction of the axis of rotation of the planet carrier is slidably and / or slidably disposed in the receiving device in the radial direction. The advantage here is that the position of the balance weight is adaptable to the positions of the planetary gears. Advantageously, this production fluctuations can be compensated.

• – Hohlräder, die jeweils eine identische Verzahnung und einen identischen Durchmesser aufweisen, insbesondere wobei die Hohlräder identisch ausgeführt sind,
• – Planetenräder, aufweisend jeweils eine identische Verzahnung und einen identischen Durchmesser, insbesondere wobei die Planetenräder identisch ausgeführt sind,
• – Sonnenräder, aufweisend jeweils eine identische Verzahnung und einen identischen Durchmesser, insbesondere wobei die Sonnenräder identisch ausgeführt sind,
• – zumindest einen ersten Planetenradträger, aufweisend in Umfangsrichtung um seine Drehachse gleichmäßig beabstandet angeordnete Lageraufnahmen für Planetenräder,
• – zumindest einen zweiten Planetenradträger, aufweisend in Umfangsrichtung um seine Drehachse ungleichmäßig beabstandet angeordnete Lageraufnahmen für Planetenräder,

wobei bei der ersten Variante des Getriebes die Planetenräder in Umfangsrichtung gleichmäßig voneinander beabstandet um das Sonnenrad herum angeordnet sind und am ersten Planetenradträger drehbar gelagert angeordnet sind,
wobei bei der zweiten Variante des Getriebes die Planetenräder in Umfangsrichtung ungleichmäßig voneinander beabstandet um das Sonnenrad herum angeordnet sind und am zweiten Planetenradträger drehbar gelagert angeordnet sind.Important features of the invention in the series of transmissions, in particular as described above and / or according to one of the claims directed to a transmission, are that the series comprises at least a first and a second variant, each composed of components, comprising the components:

• - ring gears, each having an identical toothing and an identical diameter, in particular wherein the ring gears are made identical,
• - Planet wheels, each having an identical toothing and an identical diameter, in particular wherein the planetary gears are made identical,
• - Sun gears, each having an identical toothing and an identical diameter, in particular wherein the sun gears are identical,
• At least one first planet carrier, comprising circumferentially spaced equidistantly about its axis of rotation bearing receptacles for planet gears,
• At least one second planetary gear carrier, comprising bearing receivers for planetary gears arranged unevenly around its axis of rotation in the circumferential direction,

wherein in the first variant of the transmission, the planetary gears are arranged in the circumferential direction uniformly spaced around the sun gear around and are rotatably mounted on the first planet carrier,
wherein in the second variant of the transmission, the planetary gears are arranged circumferentially unevenly spaced around the sun gear and are rotatably mounted on the second planet carrier.

The advantage here is that transmissions with identical dimensions and different translation from a kit with many common components are manufacturable. Thus, the number of parts is reducible. This improves environmental protection.

Advantageously, various integer translations are possible: i3, i4, i5, i7, i10.

In an advantageous embodiment, the first and second planet carrier each have a receiving device for a balance weight, in particular by means of a balance weight with the respective Planetenradträger is connectable, wherein in the receiving device of the second Planetenradträgers a balance weight is added. The advantage here is that the first and second planet carrier differ only in the position of the bearing mounts for the planetary gears. Thus, the first and second planet carrier are identically manufactured, only the last step of manufacturing, the introduction of the bearing mounts, the first differs from the second planet carrier. By means of the balance weight of the second planet carrier is balanced.

In an advantageous embodiment, the receiving device of the first planet carrier is empty. The advantage here is that the planet carrier can be balanced in a simple manner by being provided with the balance weight or not.

In an advantageous embodiment, the balance weight in the circumferential direction of the axis of rotation of the respective Planetenradträgers is displaceable and / or arranged displaceable in the radial direction in the receiving device. The advantage here is that the planet carrier is used for transmission with different arrangements of planetary gears. In this case, the planet carrier can be balanced in a simple manner by means of the balance weight, the position of which is adaptable to the arrangement of the planetary gears.

• – einem Hohlrad aufweisend eine Innenverzahnung,
• – Planetenrädern mit identischem Durchmesser und identischer Verzahnung, insbesondere wobei die Planetenräder identisch ausgeführt sind,
• – einem Sonnenrad,
• – einem Lager für das Hohlrad, Lagern für die Planetenräder, einem Lager für das Sonnenrad,
• – einem ersten Planetenradträger und einem zweiten Planetenradträger, wobei der erste Planetenradträger in Umfangsrichtung um seine Drehachse gleichmäßig beabstandet angeordnete Lageraufnahmen für die Planetenräder aufweist und der zweite Planetenradträger in Umfangsrichtung um seine Drehachse ungleichmäßig beabstandet angeordnete Lageraufnahmen für die Planetenräder aufweist,

wobei das Verfahren die folgenden Verfahrensschritte aufweist:
in einem ersten Verfahrensschritt wird wahlweise der erste Planetenradträger oder der zweite Planetenradträger ausgewählt,
in einem zweiten Verfahrensschritt wird der ausgewählte Planetenradträger mit den Lagern für die Planetenräder verbunden,
in einem dritten Verfahrensschritt werden die Planetenräder in den Lagern gelagert,
in einem vierten Verfahrensschritt werden die mit dem ausgewählten Planetenradträger verbundenen Planetenräder relativ zur Innenverzahnung des Hohlrades ausgerichtet und in das Hohlrad eingeführt,
in einem fünften Verfahrensschritt wird das Sonnenrad relativ zu den Planetenrädern ausgerichtet und zwischen die Planetenräder eingeführt. Important features of the invention in the method for producing at least two variants of transmissions with different transmission ratios, in particular from a series as described above and / or according to one of the claims directed to a series are that
the variants are composed of the following components:

• A ring gear having an internal toothing,
• - Planetary wheels with identical diameter and identical teeth, in particular wherein the planetary gears are made identical,
• - a sun wheel,
• A bearing for the ring gear, bearings for the planet gears, a bearing for the sun gear,
• A first planet carrier and a second planet carrier, wherein the first planet carrier has circumferentially spaced equidistant about its rotational axis bearing mounts for the planetary gears and the second planet carrier in the circumferential direction about its axis of rotation unevenly spaced bearing mounts arranged for the planet gears,

the method comprising the following steps:
in a first method step, optionally the first planet carrier or the second planet carrier is selected,
in a second method step, the selected planet carrier is connected to the bearings for the planetary gears,
in a third process step, the planet gears are stored in the bearings,
in a fourth method step, the planet gears connected to the selected planet carrier are aligned relative to the internal teeth of the ring gear and inserted into the ring gear,
In a fifth method step, the sun gear is aligned relative to the planetary gears and introduced between the planetary gears.

The advantage here is that transmissions with identical dimensions and different translation from a kit with many common components are manufacturable. Thus, the number of parts is reducible. This improves environmental protection.

Further advantages emerge from the subclaims. The invention is not limited to the combination of features of the claims. For the skilled person, further meaningful combination possibilities of claims and / or individual claim features and / or features of the description and / or figures, in particular from the task and / or posing by comparison with the prior art task arise.

The invention will now be explained in more detail with reference to an illustration:

In the 1 toothing parts of a transmission according to the invention are shown in plan view.

The transmission has a housing, wherein the housing at least one housing part 7 having, at least partially einhaust the teeth of the transmission. On the inner wall of the housing part 7 is a ring gear 6 arranged with an internal toothing. The ring gear is non-rotatable with the housing part 7 connected. Preferably, the housing part 7 a ring gear on. The housing part 7 and the ring gear 6 So they are made in one piece.

The transmission has an input shaft which is connected to a sun gear 5 rotatably connected, in particular wherein the driving shaft and the sun gear 5 are made in one piece. The sun wheel 5 has an axis of rotation 5a on.

The term rotation axis is understood to mean a mathematically imaginary axis of rotation of the respective object.

The driving shaft is in the housing, in particular in the housing part 7 , rotatably mounted.

The ring gear 6 meshes with planetary gears rotatably mounted on a planet carrier ( 1 . 2 . 3 . 4 ). Each planetary gear has a respective axis of rotation ( 1a . 2a . 3a . 4a ) on. The axes of rotation ( 1a . 2a . 3a . 4a ) are each axially parallel to the axis of rotation 5a of the sun wheel 5 arranged. The axes of rotation ( 1a . 2a . 3a . 4a ) each at the same distance from the axis of rotation 5a of the sun wheel 5 arranged. The axes of rotation ( 1a . 2a . 3a . 4a ) of planetary gears ( 1 . 2 . 3 . 4 ) are thus circular about the axis of rotation of the sun gear 5 arranged around. The sun wheel 5 is centrally between the planetary gears ( 1 . 2 . 3 . 4 ) arranged.

The planet wheels ( 1 . 2 . 3 . 4 ) are in the circumferential direction of the axis of rotation 5a of the sun gear unevenly distributed around the sun gear 5 arranged around. In this case, the circumferential angular distance (α, β, γ, δ) between the planetary gears ( 1 . 2 . 3 . 4 ), ie the angle between the axes of rotation ( 1a . 2a . 3a . 4a ) of two adjacent planet gears relative to the axis of rotation 5a of the sun wheel 5 , different values.

In one embodiment, two adjacent circumferential angular distances (α, β, γ, δ) are equal. So there are the circumferential angular distance (α, β, γ, δ) of a planetary gear to the circumferential direction next planetary gear and the circumferential angular distance (α, β, γ, δ) of this planetary gear to the opposite of the circumferential direction next planetary gear equal.

In another embodiment, two mutually diagonally opposite circumferential angular distances (α, β, γ, δ) are equal. So it's the axes of rotation ( 1a . 2a . 3a . 4a ) of planetary gears ( 1 . 2 . 3 . 4 ) arranged mirror-symmetrically to a mirror plane, wherein the axis of rotation ( 5a ) of the sun gear is completely in this mirror plane.

Advantageously, the deviation of the angular position of each planetary gear ( 1 . 2 . 3 . 4 ) of a circumferentially uniform arrangement of the planetary gears ( 1 . 2 . 3 . 4 ) less than 5 °, in particular less than 2 °, in particular between 2 ° and 1 ° or less than 1 °.

The circumferential angular distance α is the circumferential angular distance between the first planetary gear 1 and the second planetary gear 2 , The circumferential angular distance β is the circumferential angular distance between the second planetary gear 2 and the third planetary gear 3 , The circumferential angular distance γ is the circumferential angular distance between the third planetary gear 3 and the fourth planetary gear 4 , The circumferential angular distance δ is the circumferential angular distance between the fourth planetary gear 4 and the first planetary gear 1 ,

The planet carrier is rotatably connected to a driven shaft. The driven shaft is rotatable in the housing, in particular the housing part 7 stored. Preferably, the driven shaft is integral with the planet carrier.

In an embodiment of the invention, not shown, the planet carrier on a receiving device for a balance weight. The receiving device for a balance weight is suitable for receiving the balance weight. Preferably, the balance weight is arranged at a large radial distance from the axis of rotation of the planet carrier. Thus, a small balance weight is sufficient for correcting imbalance of the planet carrier and connected to the planet carrier planetary gears ( 1 . 2 . 3 . 4 ). Preferably, the balance weight is arranged displaceably in the receiving device in the circumferential direction of the planet carrier.

In an embodiment of the invention, not shown, the transmission has three planetary gears, which are arranged with unequal spacing between the next adjacent planetary gears around the sun gear. At least two circumferential angle spacings (α, β, γ, δ) have different values.

An inventive method for the production of transmissions with different ratios from a kit uses a kit, a ring gear 6 , four planet gears ( 1 . 2 . 3 . 4 ) with identical diameter and identical teeth, a sun gear 5 , a housing part 7 , a bearing for the ring gear 6 , Bearing for planetary gears ( 1 . 2 . 3 . 4 ), a bearing for the sun gear 5 and at least two differently designed planet carrier has. In this case, a first planet carrier in the circumferential direction around its axis of rotation at a uniform distance from each other arranged bearing mounts for the planet gears ( 1 . 2 . 3 . 4 ) on. A second planet carrier has in the circumferential direction about its axis of rotation at an uneven distance from each other arranged bearing mounts for the planet gears ( 1 . 2 . 3 . 4 ) on. The first and second planet carrier each have three or four bearing mounts for the planet gears ( 1 . 2 . 3 . 4 ) on.

In a first method step, the first planet carrier is selected for producing a first variant or selected for producing a second variant of the second planet carrier.

In a second method step, the selected planet carrier with the bearings for the planetary gears ( 1 . 2 . 3 . 4 ) connected.

In a third process step, the planet gears ( 1 . 2 . 3 . 4 ) stored in the warehouses.

In a fourth method step, the planetary gears connected to the planet carrier ( 1 . 2 . 3 . 4 ) relative to the ring gear 6 aligned and in the ring gear 6 introduced.

In a fifth process step, the sun gear 5 relative to the planet wheels ( 1 . 2 . 3 . 4 ) and between the planet gears ( 1 . 2 . 3 . 4 ) introduced.

• – Hohlräder, die jeweils eine identische Verzahnung und identischen Durchmesser aufweisen,
• – Planetenräder, aufweisend jeweils eine identische Verzahnung und einen identischen Durchmesser,
• – Sonnenräder, aufweisend jeweils eine identische Verzahnung und einen identischen Durchmesser,
• – zumindest einen ersten Planetenradträger, aufweisend in Umfangsrichtung um seine Drehachse in gleichmäßigem Abstand zueinander angeordnete Lageraufnahmen für Planetenräder,
• – zumindest einen zweiten Planetenradträger, aufweisend in Umfangsrichtung um seine Drehachse in ungleichmäßigem Abstand zueinander angeordnete Lageraufnahmen für Planetenräder.

An inventive series of transmissions has two variants, which are made of the kit. For this purpose, the kit points to:

• - ring gears, each having an identical toothing and identical diameter,
• Planetary gears, each having an identical toothing and an identical diameter,
• - Sun gears, each having an identical toothing and an identical diameter,
• - At least a first planet carrier, comprising in the circumferential direction about its axis of rotation equally spaced bearing receivers for planetary gears,
• - At least a second planet carrier, comprising circumferentially about its axis of rotation at an uneven distance from each other arranged bearing mounts for planetary gears.

In the first variant of the transmission, the planetary gears are arranged in the circumferential direction uniformly spaced from each other around the sun gear and rotatably mounted in the first planet carrier.

In the second variant of the transmission, the planetary gears are arranged in the circumferential direction unevenly spaced from each other around the sun gear and arranged rotatably supported in the second planet carrier.

LIST OF REFERENCE NUMBERS

1

first planetary gear

1a

first axis of rotation

2

second planetary gear

2a

second axis of rotation

3

third planetary gear

3a

third axis of rotation

4

fourth planetary gear

4a

fourth axis of rotation

5

sun

5a

axis of rotation

6

ring gear

7

housing part

α

first circumferential angle distance

β

second circumferential angular distance

γ

third circumferential angle distance

δ

fourth circumferential angle distance

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• DE 10160685 A1 [0002]

Claims (15)

Transmission comprising a housing, a planet carrier, planet gears ( 1 . 2 . 3 . 4 ), a ring gear ( 6 ) with an internal toothing and a sun gear ( 5 ), the planetary gears ( 1 . 2 . 3 . 4 ) on the planet carrier rotatable about a respective axis of rotation ( 1a . 2a . 3a . 4a ) are arranged, wherein each planetary gear ( 1 . 2 . 3 . 4 ) with the internal toothing of the ring gear ( 6 ) and the sun wheel ( 5 ) is engaged, characterized in that the planetary gears ( 1 . 2 . 3 . 4 ) about a rotation axis ( 5a ) of the sun wheel ( 5 ) are arranged around and in the circumferential direction of the axis of rotation ( 5a ) of the sun wheel ( 5 ) are unevenly spaced from each other. Transmission according to claim 1, characterized in that at least two circumferential angular distances (α, β, γ, δ) between two in the circumferential direction of the axis of rotation ( 5a ) of the sun wheel ( 5 ) next to the planetary gears ( 1 . 2 . 3 . 4 ) have different values. Transmission according to at least one of the preceding claims, characterized in that the circumferential angular distance (α, β, γ, δ) of a planetary gear to the next planetary gear in the circumferential direction and the circumferential angular distance (α, β, γ, δ) of this planetary gear to the counter to the circumferential direction next planetary are equal. Transmission according to at least one of the preceding claims, characterized in that the axes of rotation ( 1a . 2a . 3a . 4a ) of planetary gears ( 1 . 2 . 3 . 4 ) are arranged mirror-symmetrically to a plane, wherein the axis of rotation ( 5a ) of the sun gear is completely in this plane. Transmission according to at least one of the preceding claims, characterized in that the planet gears ( 1 . 2 . 3 . 4 ) have identical teeth and an identical diameter, in particular are made identical. Transmission according to at least one of the preceding claims, characterized in that each circumferential circumferential distance (α, β, γ, δ) between two nearest adjacent planetary gears ( 1 . 2 . 3 . 4 ) differs by less than 5 ° from the circumferential angular distance (α, β, γ, δ) between two adjacent planetary gears of an arrangement with evenly spaced planetary gears in the circumferential direction, in particular deviates by less than 2 °, in particular deviates between 1 ° and 2 ° or less than 1 °. Transmission according to at least one of the preceding claims, characterized in that the transmission has three or more planetary gears ( 1 . 2 . 3 . 4 ) having. Transmission according to at least one of the preceding claims, characterized in that all axes of rotation ( 1a . 2a . 3a . 4a . 5a ) are arranged axially parallel to each other. Transmission according to at least one of the preceding claims, characterized in that each of the axes of rotation ( 1a . 2a . 3a . 4a ) of planetary gears ( 1 . 2 . 3 . 4 ) at the same distance from the axis of rotation ( 5a ) of the sun wheel ( 5 ) is arranged. Transmission according to at least one of the preceding claims, characterized in that the planet carrier has a receiving device for a balance weight, in particular by means of a balance weight with the planet carrier is connectable, in particular wherein in the receiving device of the planet carrier a balance weight is added. Transmission according to at least one of the preceding claims, characterized in that the balancing weight is arranged displaceably in the circumferential direction of the axis of rotation of the planet carrier and / or displaceable in the radial direction in the receiving device. Series of transmissions, in particular according to at least one of the preceding claims, comprising at least a first and a second variant, each composed of components, comprising the components: - ring gears ( 6 ), each having an identical toothing and an identical diameter, in particular wherein the ring gears ( 6 ) are identical, - planet gears ( 1 . 2 . 3 . 4 ), each having an identical toothing and an identical diameter, in particular wherein the planetary gears ( 1 . 2 . 3 . 4 ) are identical, 5 ), each having an identical toothing and an identical diameter, in particular wherein the sun gears ( 5 ) are identically designed, - at least a first planet carrier, having in the circumferential direction about its axis of rotation evenly spaced bearing mounts for planetary gears ( 1 . 2 . 3 . 4 ), - at least one second planet carrier, having in the circumferential direction around its axis of rotation unevenly spaced bearing mounts arranged for planetary gears ( 1 . 2 . 3 . 4 ) wherein in the first variant of the transmission, the planet gears ( 1 . 2 . 3 . 4 ) in the circumferential direction evenly spaced around the sun gear ( 5 ) are arranged around and are rotatably mounted on the first planet carrier, wherein in the second variant of the transmission, the planet gears ( 1 . 2 . 3 . 4 ) circumferentially unevenly spaced around the sun gear ( 5 ) are arranged around and are rotatably mounted on the second planet carrier. Series of transmissions according to claim 12, characterized in that the first and second planet carrier each have a receiving device for a balance weight, in particular by means of a balance weight with the respective planet carrier is connectable, wherein in the receiving device of the second planet carrier a balance weight is added, in particular the receiving device of the first planet carrier is empty. Series of transmissions according to claim 13, characterized in that the balance weight in the circumferential direction of the axis of rotation of the respective Planetenradträgers is slidably and / or arranged displaceable in the radial directionin the receiving device. Method for producing at least two variants of transmissions with different transmission ratios, in particular from a series according to claim 12 to 14, wherein the variants are composed of the following components: - a ring gear ( 6 ) having an internal toothing, - planetary gears ( 1 . 2 . 3 . 4 ) with identical diameter and identical teeth, in particular where the planet gears ( 1 . 2 . 3 . 4 ) are identical, - a sun gear ( 5 ), - a bearing for the ring gear ( 6 ), Bearings for the planet gears ( 1 . 2 . 3 . 4 ), a bearing for the sun gear ( 5 ), - a first planet carrier and a second planet carrier, wherein the first planet carrier in the circumferential direction about its axis evenly spaced bearing mounts arranged for the planetary gears ( 1 . 2 . 3 . 4 ) and the second planet carrier in the circumferential direction about its axis of rotation unevenly spaced bearing mounts arranged for the planet gears ( 1 . 2 . 3 . 4 ), wherein the method comprises the following method steps: in a first method step optionally the first planet carrier or the second planet carrier is selected in a second method step, the selected planet carrier with the bearings for the planetary gears ( 1 . 2 . 3 . 4 ), in a third process step, the planet gears ( 1 . 2 . 3 . 4 ) stored in the bearings, in a fourth process step, the planetary gears connected to the selected planet carrier ( 1 . 2 . 3 . 4 ) relative to the internal toothing of the ring gear ( 6 ) and into the ring gear ( 6 ), in a fifth process step, the sun gear ( 5 ) relative to the planetary gears ( 1 . 2 . 3 . 4 ) and between the planet gears ( 1 . 2 . 3 . 4 ) introduced.

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