DE102018001084A1 - transmission - Google Patents

Abstract

Transmission,
comprising a driven shaft, which is rotatably mounted via a first and an axially spaced therefrom second bearing,
wherein the first and the second bearing are accommodated in a housing part,
wherein a sealing seat is arranged axially between the bearings on the housing part, in particular correspondingly finely machined,
wherein the aborting shaft has a running surface for a seal seat which can be accommodated on the seal seat, in particular for a sealing lip of the shaft seal,
in particular, wherein the tread is processed accordingly fine,
wherein radially between the tread and seal seat in the tread and the seal seat together overlapped axial region is a free space, in particular wherein the free space is filled only by air and / or lubricant or alternatively a shaft seal is arranged in the free space.

Description

The invention relates to a transmission.

It is well known that gears have a driven shaft which is rotatably supported by bearings received in a housing part and sealed by means of a shaft seal received in the housing part to the environment.

From the DE 196 03 007 A1 is known as the closest prior art, a transmission.

From the DE 103 12 941 A1 is a kit for a series of geared motors known.

From the DE 10 2011 108 413 A1 is a freewheel known.

From the DE 24 02 067 A1 a device for mounting an electric motor to a gearbox is known.

The invention is therefore the object of developing a transmission, with a small number of parts, a large number of different transmissions should be formed.

According to the invention the object is achieved in the transmission according to the features specified in claim 1.

Important features of the invention in the transmission are that the transmission has a driven shaft, which is rotatably mounted via a first and an axially spaced therefrom second bearing,
wherein the first and the second bearing are accommodated in a housing part,
wherein a sealing seat is arranged axially between the bearings on the housing part, in particular correspondingly finely machined,
wherein the aborting shaft has a running surface for a seal seat which can be accommodated on the seal seat, in particular for a sealing lip of the shaft seal,
in particular, wherein the tread is processed accordingly fine,
wherein radially between the tread and seal seat in the tread and the seal seat together overlapped axial region is a free space, in particular wherein the free space is filled only by air and / or lubricant or alternatively a shaft seal is arranged in the free space.

The advantage here is that a shaft seal on the seal seat is not present but can be accommodated, the sealing lip runs on the tread. Thus, then various types of lubricant in the transmission interior and in the first bearing having space area can be accommodated.

Thus, if the shaft seal does not exist, the same lubricant can be used for the first bearing as for the second bearing and the transmission interior. Nevertheless, the suitability for the formation of the other variant with existing shaft seal and thus two different types of lubricant is present.

For this other variant of the seal seat is prepared, so finely machined accordingly. Likewise, the tread is prepared for this other variant, so processed accordingly fine.

In an advantageous embodiment, the bearings on sealing disks, in particular two axially spaced apart sealing disks. The advantage here is that the bearings are grease lubricated operable. When omitting the axially sealable between the first and second bearings shaft seal the transmission interior is also lubricated with a grease.

In an advantageous embodiment, the first bearing is arranged on the side facing away from the transmission interior side of the second bearing. The advantage here is that the bearings can be acted upon with the same lubricant, although in the space between them axially spaced space, in particular clearance, a shaft seal would be arranged.

In an advantageous embodiment, a further seal is arranged on the side facing away from the transmission interior side of the first bearing, in particular a further shaft seal,
in particular, wherein the further seal seals the first bearing to the environment,
in particular wherein the further seal is designed as a further shaft sealing ring, which is accommodated in the housing part and which seals off to the aborting shaft. The advantage here is that by means of the further seal a seal to the environment is accessible.

In an advantageous embodiment, in the presence of the shaft seal in the free space, the first bearing with a different lubricant, in particular fat, acted as the transmission interior,
in particular wherein oil is provided in the transmission interior as a lubricant. The advantage here is that the transmission according to the invention opens the possibility to provide by installing the shaft seal on the existing seal seat separate lubricant for gear interior and first bearing.

In an advantageous embodiment, the first bearing, the second bearing and the transmission interior are acted upon with the same lubricant in the absence of the shaft seal in the free space. The advantage here is that only a single lubricant in the transmission interior is providable, which also lubricates the bearings, especially the first bearing. Thus, then power loss of a shaft seal can be saved and the bearings are then executable even without sealing washers, especially when oil is used as a lubricant.

In an advantageous embodiment of the seal seat is arranged on a stage of the driven shaft, against which the first bearing and the second bearing are employed,
in particular wherein the seal seat is arranged on a smaller diameter than the bearing seat provided for the first bearing and as the bearing seat provided for the second bearing. The advantage here is that the shaft seal on a smaller diameter can be installed and thus the power loss is reduced. In addition, the area with a smaller diameter can be executed as a shaft stage and thus used for adjusting the bearings against the shaft stage. In this case, the first bearing is pressed in the direction of the second bearing on the stage and the second bearing pressed in the opposite direction to the stage.

In an advantageous embodiment, the housing part has a channel, which opens from the surface of the Gehäsueteils directed towards the environment in the space area, which is arranged axially between the seal seat and the first bearing,
in particular so that the first bearing to its lubrication fat can be supplied. The advantage here is that a relubrication during operation is possible, in particular so without removing the gearbox from a machine or system.

In an advantageous embodiment, the channel is closed to the environment by means of a closure means, in particular wherein the closure means is screw-connected to the housing part, wherein the closure means in the presence of the shaft seal is a grease nipple and wherein in the absence of the shaft seal, the closure means is a screw plug. The advantage here is that in the absence of the shaft seal, so execution of the transmission as a grease-lubricated gear, relubrication with grease through the channel is possible and on the other hand, in the presence of the shaft seal, so execution of the transmission as oil-lubricated gearbox, the output side bearing grease lubricated executable and can be relubricated. This non-existence of the shaft seal is evident from the fact that the shaft has very well a tread, that is processed accordingly fine, in an axial region which overlaps with an axial Beriech on the housing part, which is machined as a sealing fit according to fine for receiving the shaft seal , Nevertheless, no shaft seal is included in this seat.

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 options of claims and / or individual claim features and / or features of the description and / or figures, in particular from the task and / or by posing the task by comparison with the prior art task.

• In der 1 ist ein Ausschnitt eines Querschnitts durch ein Planetengetriebe gezeigt, wobei axial zwischen den Lagern (6, 7) des Planetenradträgers 1 keine Dichtung angeordnet ist.
• In der 2 ist ein Ausschnitt eines Querschnitts durch ein Planetengetriebe gezeigt, wobei axial zwischen den Lagern (6, 7) des Planetenradträgers 1 als Dichtung ein Wellendichtring 20 angeordnet ist.

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

• In the 1 is a section of a cross section through a planetary gear shown, wherein axially between the bearings (6, 7) of the planet carrier 1, no seal is arranged.
• In the 2 is a section of a cross section through a planetary gear shown, wherein axially between the bearings (6, 7) of the planet carrier 1 as a seal, a shaft seal 20 is arranged.

As shown in the figures, the planet carrier is 1 by means of a first bearing 6 and another camp 7 rotatably mounted. Camps 6 and 7 are in a housing part 2 recorded the planetary gear. The first camp 6 is on the output side, so arranged further out than the other camp 7 , The further camp 7 has smaller rolling elements than the first bearing 6 ,

Axial between the bearing seats of the bearings 6 and 7 is a seal seat 5 arranged on which in the execution after 1 no seal is included and on which in the execution after 2 a shaft seal 20 is included.

The in 2 illustrated shaft seal 20 has a sealing lip on one on the planet carrier 1 provided tread 3 running. Thus is

Thus, axially between the first bearing 6 and the other camp 7 arranged a seal which allows the use of different lubricants.

On the from the further camp 7 in the axial direction facing away from the camp 6 is a seal 10 arranged. Preferably, this seal is also 10 executable as a shaft seal.

Camps 6 and 7 are each carried out with sealing washers. Thus, the bearings ( 6 . 7 ) also seals on.

In the planet carrier 1 are circumferentially spaced from one another regularly planetary pins 8th recorded, which are each arranged at the same radial distance.

On the respective planet pins 8th is a respective bearing, in particular needle bearing, recorded, on each of which a respective planetary gear 9 taken up and thus rotatably mounted.

Every planetary gear 9 is with its teeth in engagement with the teeth of a ring gear 11, which with the housing part 2 connected, in particular screw-connected, is.

In addition, the teeth of each of the planet gears 9 in engagement with the teeth of a coaxial with the planet carrier 1 aligned sun gear.

By means of the gaskets, the use of different lubricants is made possible for the different areas of space defined by gaskets:

The following is mentioned as a lubricant grease and oil. It should be understood by oil and aqueous lubricants.

In the execution after 1 So without a shaft seal 20 , either a grease or an oil is usable as a lubricant. Because the environment is only the seal 10 available. Preferably, in this embodiment, the bearings 6 and 7 also executable without sealing washers. Thus, the same lubricant is used throughout the interior of the transmission as for the bearings 6 and 7 ,

In the execution after 2 is in the transmission interior, in particular in that space area, which includes the teeth, an oil usable, wherein the first bearing 6 with grease is lubricated. Thus, therefore, another lubricant in the transmission interior is used as for the first bearing 6 is used.

In addition, when using the shaft seal 20 , as in 2 shown, increased tightness achievable.

The seal seat 5 is disposed on a stage of the aborting shaft against which the first bearing 6 and the second camp 7 are employed,
in particular, wherein the seal seat 5 arranged on a smaller diameter than that for the first bearing 6 provided bearing seat and as the second bearing 7
provided bearing seat. Thus, the seal seat 5 arranged on a radial thickening, so to speak, wherein the axial area covered by this radial thickening from that of the tread 3 and the seal seat 5 Covered covered axial area.

In the housing part 6 a channel is arranged, which opens into the region which is axially between the seal seat 5 and output side bearing is arranged.

The invention can also be used for planetary gear. In this case, a planetary gear is to be subsumed under the term planetary gear and the term of the planet carrier the aborting shaft of the epicyclic gear.

In a corresponding manner, the invention is also applicable to another transmission, in which case the planet carrier is the aborting shaft and the planet gears are not present, as well as the sun gear and the ring gear.

LIST OF REFERENCE NUMBERS

1

planet

2

housing part

3

tread

4

race

5

seal seat

6

Output side bearing of the planet carrier

7

Another bearing of the planet carrier

8th

planet shaft

9

planet

10

Seal, in particular shaft seal

20

Shaft seal

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 19603007 A1 [0003]
• DE 10312941 A1 [0004]
• DE 102011108413 A1 [0005]
• DE 2402067 A1 [0006]

Claims (9)

Transmission, comprising a driven shaft, which is rotatably supported via a first and an axially spaced second bearing, wherein the first and the second bearing are accommodated in a housing part, characterized in that axially between the bearings, a sealing seat is arranged on the housing part, In particular, according to finely machined, wherein the driven shaft has a tread for a seal seat on the receiving shaft seal, in particular for a sealing lip of the shaft seal, in particular wherein the tread is processed accordingly finely, wherein radially between the tread and seal seat in the of the tread and the Seal seat jointly covered axial region is a free space formed, in particular wherein the free space is filled only by air and / or lubricant or alternatively a shaft seal is arranged in the free space. Gearbox after Claim 1 , characterized in that the bearings have sealing disks, in particular two axially spaced apart sealing disks. Transmission according to at least one of the preceding claims, characterized in that the first bearing is arranged on the side facing away from the transmission interior side of the second bearing. Transmission according to at least one of the preceding claims, characterized in that on the side facing away from the transmission interior side of the first bearing another seal is arranged, in particular a further shaft seal, in particular wherein the further seal seals the first bearing to the environment, in particular wherein the further seal is designed as a further shaft seal, which is accommodated in the housing part and which seals off to the driving shaft. Transmission according to at least one of the preceding claims, characterized in that in the presence of the shaft seal in the free space, the first bearing with a different lubricant, in particular fat, is acted upon as the transmission interior, in particular wherein the transmission interior is provided as a lubricant oil. Transmission according to at least one of the preceding claims, characterized in that in the absence of the shaft seal in the free space, the first bearing, the second bearing and the transmission interior are subjected to the same lubricant. Transmission according to at least one of the preceding claims, characterized in that the seal seat is disposed on a stage of the driven shaft, against which the first bearing and the second bearing are employed, in particular wherein the seal seat is arranged on a smaller diameter than that for the first Bearing provided bearing seat and as the intended for the second bearing bearing seat. Transmission according to at least one of the preceding claims, characterized in that the housing part has a channel which opens from the surface of the Gehäsueteils directed towards the environment in the space region, which is arranged axially between the seal seat (5) and the first bearing (6) in particular so that the first bearing (6) can be supplied with grease for its lubrication. Transmission according to at least one of the preceding claims, characterized in that the channel is closed to the environment by means of a closure means, in particular wherein the closure means is screw-connected to the housing part, wherein the closure means in the presence of the shaft seal is a grease nipple and wherein in the absence of the Shaft seal the closure means is a screw plug.

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