Transmission comprising a first housing part and a second housing part

Abstract

A transmission comprising a first housing part and a second housing part is disclosed, wherein the first housing part has a first side wall and a second side wall, wherein a first bearing of the drive input shaft and / or a first bearing of an intermediate shaft of the transmission are / is received in the first side wall, wherein a second bearing of the drive input shaft and / or a second bearing of an intermediate shaft of the transmission are / is received in the second side wall, wherein a first bearing of the drive output shaft is received in the first side wall, wherein a drive output bearing of the drive output shaft is received in the second housing part, wherein a first toothed gear is connected to the drive output shaft fixedly for conjoint rotation, said first toothed gear meshing with a second toothed gear which is connected to a second shaft fixedly for conjoint rotation, wherein a first bearing of the second shaft is arranged in the second side wall of the first housing part, wherein a drive output bearing of the second shaft is received in the second housing part, wherein the second shaft is oriented parallel to the drive output shaft.

Description

[0001] Gearbox with a first housing part and a second housing part

[0002] Description:

[0003] The invention relates to a gearbox with a first housing part and a second housing part.

[0004] It is generally known that a gearbox has a housing part.

[0005] From CN 2 13 393 363 U, a gearbox with a double-shaft output is known as the closest prior art.

[0006] From CN 2 03413 043 U a gearbox with a one-piece housing and double-shaft output is known, wherein the bearings are lubricated from a single central lubricating oil source.

[0007] From DE 102017 121 608 A1, a gearbox with two output shafts that are not aligned parallel to each other is known. Furthermore, the bearing of an intermediate shaft is arranged in the same side wall of the gearbox housing as the two output bearings of the output shafts.

[0008] A vertical conical double-shaft extruder gearbox is shown from CN 2 03 384 340 U.

[0009] A gearbox with two output shafts is shown in CN 1 10 541 913 A.

[0010] A gearbox with two output shafts is also shown in CN 1 04 121 331 A.

[0011] The output side of a gearbox with two output shafts is shown in CN 1 02 865 351 A.

[0012] A gearbox for twin-screw extruders is known from DE 197 54 359 A1. A gearbox with a first and a second housing part is known from DE 102023000 999 A1.

[0013] A gearbox is known from CN 2 01 386 774 Y.

[0014] A ring rolling mill is known from DE 21 56269 A.

[0015] A geared motor is known from DE 202 06 979 U1.

[0016] A gearbox is known from CN 1 10271 163 A.

[0017] From DE 102022 001 423 A1 a geared motor with an electric motor driving a gearbox is known.

[0018] A crown wheel gearbox is known from DE 202021 104 559 U1.

[0019] A gearbox is known from CN 1 06 838 127 A.

[0020] A screw press is known from DE 19 08382 U.

[0021] A wave arrangement is known from DE 102020005 857 A1.

[0022] The invention is therefore based on the objective of further developing a gearbox in such a way that an extruder can be driven.

[0023] According to the invention, the problem is solved in the transmission according to the features specified in claim 1.

[0024] Important features of the invention in the transmission with a first housing part and a second housing part are that the first housing part has a first side wall and a second side wall, wherein a first bearing of the driving shaft and / or a first bearing of an intermediate shaft of the transmission is received in the first side wall, wherein a second bearing of the driving shaft and / or a second bearing of an intermediate shaft of the transmission is received in the second side wall, wherein a first bearing of the driven shaft is received in the first side wall, a first gear is non-rotatably connected to the driven shaft, which is in mesh with a second gear which is non-rotatably connected to a second shaft, wherein a first bearing of the second shaft is arranged in the second side wall of the first housing part, wherein the second shaft is aligned parallel to the driven shaft.wherein a first bearing of the driven shaft is received in the first housing part, in particular in the first side wall of the first housing part, and an output bearing of the driven shaft is received in a bearing flange, which is composed of a ring part, a sealing flange, in particular annular, and a hollow flange, in particular a hollow bushing, arranged between the ring part and the sealing flange, wherein the bearing flange is received in the second housing part, in particular in the second side wall of the second housing part, and / or is connected to the second housing part, wherein an angular contact bearing and a further bearing of the driven shaft are received in the hollow flange, in particular a hollow bushing, wherein at least one shaft seal, in particular two mutually contacting shaft seals, is or are received in the sealing flange.wherein the at least one shaft seal or the shaft seals seal or seal against a bushing mounted on the driven shaft, wherein a grease nipple is provided and / or arranged in a radial bore of the sealing flange, wherein the radial bore opens into the space surrounded by the sealing flange in which the shaft seal or the shaft seals are arranged, wherein the ring part is detachably connected to the second housing part, in particular by means of screws.

[0025] An advantage of this design is that the second shaft is also supported by a bearing in the first housing part, but not in the same side wall of the preferably cuboid-shaped first housing part. Therefore, neither side wall is overloaded.

[0026] The second housing section does not contain any bearings for the input shaft or the intermediate shafts. Only the bearings for the second shaft and the output bearing of the driven shaft are housed in the second housing section.

[0027] The first and second gears are located outside the first housing part.

[0028] The input shaft can also be called the drive shaft or input shaft and preferably has a smaller diameter than the output shaft, which can also be called the output shaft or driving shaft of the gearbox.

[0029] The output bearing can be pre-assembled within the hollow flange. This allows for easy assembly.

[0030] It is also important that grease can be supplied through the radial bore to lubricate a dust seal, even though lubricating oil is used inside the gearbox. The shaft seal(s) separate the grease-filled area from the oil-filled area.

[0031] In a preferred embodiment, a dust sealing ring is fitted onto the bushing, the sealing lip of which seals against the sealing flange. An advantage of this design is that the grease lubrication improves the dust seal, since the sealing lip of the dust sealing ring facing the sealing flange is coated with grease.

[0032] In an advantageous embodiment, an annular gap is formed between the sealing flange and the bushing, which the dust sealing ring seals against the environment, particularly in that the annular gap opens into the internal space. It is advantageous that the annular gap can be filled with grease and the dust sealing ring can also be supplied with grease, thus preventing particles from the environment, such as dirt particles, from penetrating the gearbox.

[0033] In an advantageous embodiment, a shaft nut is screwed to the driven shaft,

[0034] - wherein the shaft nut is arranged in the space area surrounded by the sealing flange, and / or wherein the area covered by the shaft nut in the axial direction is encompassed by the area covered by the sealing flange in the axial direction and is arranged axially between the area covered by the bushing in the axial direction and the area covered by the angular contact bearing and the further bearing in the axial direction, and / or wherein the area covered by the shaft nut in the radial direction, in particular with respect to the axis of rotation of the driving shaft (radial distance area), overlaps with the area covered by the bushing in the radial direction and / or with the area covered by the sealing flange in the radial direction.

[0035] An advantage of this is that the bearing tension can be adjusted and / or an axial limit for the shaft seal or shaft seals can be achieved.

[0036] In a preferred embodiment, the sealing lip of the shaft seal ring, or the sealing lips of the shaft seal rings, seals against the bushing. An advantage here is that the bushing can be machined to a fine finish, thus minimizing wear on the running surface of the sealing lips.

[0037] In an advantageous embodiment, the first gear is identical to the second gear. The advantage here is that a gear ratio of one can be achieved, thus ensuring that the driven shaft and the second shaft rotate at the same speed. In this advantageous embodiment, the rotational speed of the driven shaft is always equal to the rotational speed of the second shaft. It is also advantageous that the two shafts can be used as an extruder drive. For this purpose, the two shafts are aligned parallel to each other.

[0038] In an advantageous embodiment, the output bearing of the driven shaft comprises a bearing received in the second housing part and a bearing receiving part, in particular a bearing flange, wherein an angular contact bearing is received in the bearing receiving part for supporting the driven shaft, and the flange part is detachably connected to the second housing part. It is advantageous that the second housing part extends axially far enough to accommodate the bearing designed as a rolling bearing and the angular contact bearing axially one behind the other.

[0039] In an advantageous embodiment, the output bearing of the second shaft comprises a bearing received in the second housing part and a bearing receiving part, in particular a bearing flange, wherein an angular contact bearing is received in the bearing receiving part of the output bearing of the second shaft for supporting the driven shaft, the flange part being detachably connected to the second housing part. It is advantageous that the second housing part extends axially far enough to accommodate the bearing designed as a rolling bearing and the angular contact bearing axially one behind the other.

[0040] In an advantageous embodiment, the second housing part is in contact with the second side wall of the first housing part. It is advantageous that a centering element can be formed on the second side wall, allowing the second housing part to be centered on it and thus enabling a precise connection.

[0041] In an advantageous embodiment, the first side wall is spaced apart from the second housing part. The advantage here is that the forces can be distributed widely.

[0042] In an advantageous embodiment, the first housing part is connected to the second housing part in a particularly oil-tight manner. An advantage of this is that the second housing part allows for an extension of the gearbox housing, and thus the gearbox output, which can be used as an extruder drive, can optionally be provided on the gearbox. In an advantageous embodiment, the first housing part is designed in two parts, with the two parts of the first housing part being joined at a parting line that bisects the bearing receptacles of the first bearing of the driven shaft and the bearing receptacle of the first bearing of the second shaft. An advantage of this is that the gearbox is easy to manufacture. The intermediate shaft and input shaft, together with their bearings, can be inserted into the first part, and then the second part can be attached.

[0043] The bearing housings for the output shaft and the second shaft, located in the first housing part, are also divided by the parting line. The output bearings of these shafts, i.e., the bearings located in the second housing part or the angular contact bearings located in the respective flange part, are arranged in undivided bearing housings. This allows for the dissipation of high loads through these bearing housings, particularly transverse and axial forces.

[0044] In an advantageous embodiment, the respective bearing mounts of the output bearings of the driven shaft and the second shaft are manufactured as a single unit, and in particular, are spaced apart from the parting line. An advantage of this is that a high load can be dissipated on the output side.

[0045] In an advantageous embodiment, the second housing part has a third and a fourth side wall, wherein the output bearing of the driven shaft and the output bearing of the second shaft are arranged and / or received in the fourth side wall, the third side wall being pressed against the second side wall of the first housing part by means of screws, with a flat gasket being positioned between the second side wall of the first housing part and the third side wall of the second housing part. It is advantageous that the second housing part can be omitted to form a different gearbox variant, and the second shaft can also be omitted, with the output bearing of the driven shaft being implemented in the second side wall of the first housing part. Thus, a gearbox variant with a one-piece output shaft can be developed, which is not suitable for extruder applications.In this way, a modular system is created that allows for a large number of transmission variants with a small number of parts.

[0046] In an advantageous embodiment, the first side wall is aligned parallel to and spaced apart from the second side wall, the third side wall is aligned parallel to the second side wall, and the fourth side wall is aligned parallel to and spaced apart from the third side wall. It is advantageous that the first housing part can also be used for a gearbox variant that does not include an extruder drive. In this case, the second housing part and the second shaft are omitted.

[0047] In an advantageous embodiment, the output shaft passes through a bearing receptacle formed and / or shaped in the second side wall of the first housing part, particularly centrally, wherein a free space, at least partially filled with lubricating oil, is arranged between the output shaft and this bearing receptacle, and in particular, no bearing is accommodated in this bearing receptacle. It is advantageous that, optionally, a gearbox variant without the double-shaft extruder output can be designed, in which case the second housing part and the second shaft are omitted.

[0048] Further advantages arise from the dependent claims. The invention is not limited to the combination of features in the claims. For those skilled in the art, further meaningful combinations of claims and / or individual claim features and / or features of the description and / or the figures will become apparent, particularly from the problem statement and / or the problem arising from a comparison with the prior art. The invention will now be explained in more detail with reference to schematic illustrations.

[0049] Figure 1 shows a cross-sectional view of a gearbox that does not conform to the invention.

[0050] Figure 2 shows the gearbox in a first viewing direction in an oblique view.

[0051] Figure 3 shows the gearbox from a different viewing direction in an oblique view.

[0052] Figure 4 shows a cross-sectional view of a gearbox according to the invention.

[0053] Figure 5 shows an enlarged section of Figure 4.

[0054] Figure 6 shows an enlarged section of Figure 5, with Figure 6 shown without hatching to make the components easier to see.

[0055] As shown in Figures 1 to 3, a multi-stage parallel shaft transmission is arranged in a first housing part.

[0056] For this purpose, a driving shaft 6 is rotatably mounted via bearings which are received in the first housing part 1.

[0057] A gear non-rotatably connected to the driving shaft 6 is in mesh with a gear which is non-rotatably connected to an intermediate shaft.

[0058] The driven shaft 11 is rotatably mounted by means of a bearing 7 received in the first housing part 1.

[0059] A second housing part 2 is connected to the first housing part 1 and, together with the first housing part 1, defines the lubricating oil-filled interior of the gearbox.

[0060] The second housing part accommodates a bearing 14, which also rotatably supports the driven shaft 11 and, together with an angular contact bearing 12, which is mounted in a bearing flange 13 connected to the second housing part 2, forms the output bearing, i.e., the output-side bearing of the driven shaft 11. The driven shaft 11 is non-rotatably connected to a gear 4 mounted on it, which meshes with a gear 5 mounted on a shaft 10 and non-rotatably connected to this shaft 10.

[0061] The shaft 10 is arranged parallel to the driving shaft 11, so that the two shafts are available as an extruder drive.

[0062] The two shafts 10 and 11 have the same diameter and can therefore be used for the same torque. Preferably, the two shafts 10 and 11 rotate at the same speed.

[0063] A first bearing 3 of the shaft 10 is received in the first housing part 1. However, this bearing 3 is received in the wall of the first housing part 1 opposite the bearing 7 of the driven shaft 11.

[0064] The first housing part 1 has bearings not only for the driving shaft 6 but also for the intermediate shafts. The first bearings are mounted in a first side wall 46 of the first housing part 1, and the remaining bearings are mounted in a second side wall 45 opposite this first side wall.

[0065] The first side wall 46 is arranged on the side of the second side wall 45 facing away from the second housing part 2.

[0066] The second housing part 2 is positioned and aligned so that it touches the second side wall.

[0067] The bearing 3 of shaft 10 is therefore located in the second side wall. The output bearing of shaft 10, however, is located in the second housing part 2 and is designed in the same way as the driven shaft 11. The flange part 8, which, like the flange part 13, is located in the second housing part 2, allows for quick and easy replacement of the angular contact bearing 9 or 12. For this purpose, both flange parts (8 and 13) are each designed in two parts: A ring section of each flange part (8, 13) is connected to the second housing part 2 by means of screws. The driven shaft 11 is a single piece and preferably protrudes from the side of the second housing part 2 facing away from the driving shaft 6.

[0068] In the axial direction, the driven shaft 11 covers the entire area covered in the axial direction by each intermediate shaft, as well as the area covered in the axial direction by shaft 10. However, the area covered in the axial direction by shaft 10 overlaps with the axial area covered by each intermediate shaft.

[0069] In particular, the addition of the second housing part 2 enables a double shaft output.

[0070] Preferably, a bearing receptacle is provided in the side wall of the first housing part 1 in the area through which the driven shaft 11 passes. Thus, by providing a bearing and removing the second housing part 2 along with the second shaft 10, a different gearbox variant can be produced that has only a single driven shaft 11. The invention therefore offers the advantage of enabling a high variety of gearbox variants to be produced with a small number of parts.

[0071] Figures 4 to 6 show the transmission according to the invention in more detail.

[0072] This differs from the gearbox shown in Figures 1 to 3 in that the angular contact bearing 12 is further away from the outer environment of the gearbox in the axial direction than bearing 14.

[0073] Another difference between the embodiment according to Figures 4 to 6 and the embodiment according to Figures 1 to 3 is that in the embodiment according to Figures 4 to 6 the bearing 14 and also the angular contact bearing 12 are accommodated in the hollow flange 41.

[0074] Furthermore, the bearing flange 13 for receiving the driving shaft 11 is composed of a ring part 40, a hollow flange 41 and a sealing flange 42, wherein the hollow flange 41 is arranged axially between the ring part 40 and the sealing flange 42.

[0075] The ring part 40 is received in the second housing part 2 and connected to the second housing part 2. Both the angular contact bearing 12 and the bearing 14 are received in the hollow flange 41, with the angular contact bearing 12 being arranged further inwards than the bearing 14, in contrast to the embodiment shown in Figures 1 to 3.

[0076] The sealing flange 42 is ring-shaped and connected to the hollow flange 41.

[0077] Furthermore, a bushing 60 is fitted onto the driven shaft 11.

[0078] Furthermore, a pair of shaft seals 62 are accommodated in the sealing flange 42, the sealing lips of which each run on the outer circumference of the bushing 60 and / or seal against the outer circumference of the bushing 60. The bushing 60 is mounted on the driven shaft 11 in a rotationally fixed manner.

[0079] Furthermore, the shaft nut 64 is arranged axially between the bushing 60 and the bearing 14.

[0080] It is also important that a dust sealing ring 61 is placed on the bushing 60 and is positively connected to the bushing 60, with a sealing lip of the dust sealing ring 61 touching the sealing flange 42.

[0081] A grease nipple 63 is provided in a radial bore of the sealing flange 42, through which the interior space surrounded by the sealing flange 42 can be lubricated. In this way, the two shaft seals 62 can be supplied with lubricant on their outer side.

[0082] The interior of the gearbox is preferably at least partially filled with oil.

[0083] Since bearings 14 and 7 are now further apart than in the design according to Figures 1 to 3, high lateral forces are tolerable.

[0084] The output-side bearing and seal are designed the same for shaft 10 as for shaft 11. Therefore, a grease nipple 63, a pair of shaft seals 62, and a dust seal 61 are also present here. Reference numeral list

[0085] 1 housing part

[0086] 2 Housing part

[0087] 3 warehouses

[0088] 4 gear

[0089] 5 gear

[0090] 6 driving shaft

[0091] 7 warehouses

[0092] 8 bearing flange

[0093] 9 bearings, especially angular contact bearings

[0094] 10 wave

[0095] 11 outgoing wave

[0096] 12 bearings, especially angular contact bearings

[0097] 13 Bearing flange

[0098] 14 warehouses

[0099] 40 ring part

[0100] 41 Hollow flange

[0101] 42 Sealing flange

[0102] 43 first bearing of the driving shaft 6

[0103] 44 second bearing of the driving shaft 6

[0104] 45 second side wall of the first housing part 1

[0105] 46 first side wall of the first housing part 1

[0106] 47 second side wall of the first housing part 2

[0107] 48 first side wall of the first housing part 2

[0108] 60 socket

[0109] 61 Dust sealing ring

[0110] 62 Shaft seal

[0111] 63 grease nipples

[0112] 64 Shaft nut

Claims

Patent claims:

1. Gearbox with a first housing part (1) and a second housing part (2), wherein the first housing part (1) has a first side wall and a second side wall, wherein a first bearing (43) of the driving shaft and / or a first bearing of an intermediate shaft of the gearbox is received in the first side wall, wherein a second bearing (44) of the driving shaft and / or a second bearing of an intermediate shaft of the gearbox is received in the second side wall, wherein a first bearing of the driven shaft (11) is received in the first side wall (46), characterized in that a first gear (4) is non-rotatably connected to the driven shaft (11), which is in mesh with a second gear (5) which is non-rotatably connected to a second shaft (10), wherein a first bearing (3) of the second shaft (10) is arranged in the second side wall (45) of the first housing part (2),wherein the second shaft (10) is aligned parallel to the driving shaft (11), wherein a first bearing (7) of the driving shaft (11) is received in the first housing part (1), in particular in the first side wall (46) of the first housing part (1), and an output bearing of the driving shaft (11) in a bearing flange, which is composed of a ring part (40), a sealing flange (42) in particular of an annular type, and a hollow flange (41), in particular a hollow bushing, arranged between the ring part (40) and the sealing flange (42). wherein the bearing flange is received in the second housing part (2), in particular in the second side wall (47) of the second housing part (2), wherein an angular contact bearing (12) and a further bearing (14) of the driving shaft are received in the hollow flange (41), in particular hollow bushing, wherein at least one shaft seal, in particular two mutually contacting shaft seals, is or are received in the sealing flange (42), wherein the at least one shaft seal or the shaft seals seal towards a bushing mounted on the driving shaft (11), wherein a grease nipple (63) is provided and / or arranged in a radial bore of the sealing flange (42), wherein the radial bore opens into the space surrounded by the sealing flange (42) in which the shaft seal or the shaft seals are arranged, wherein the ring part (40) is detachably connected to the second housing part (2). is,especially connected by screws.

2. Gearbox according to claim 1, characterized in that a dust sealing ring (61) is fitted onto the bushing (60), the sealing lip of which seals towards the sealing flange (42).

3. Gearbox according to claim 1, characterized in that an annular gap is formed between the sealing flange (42) and the bushing (60), which the dust sealing ring (61) seals to the environment, in particular wherein the annular gap opens into the room area.

4. Gearbox according to one of the preceding claims, characterized in that a shaft nut (64) is screwed to the driven shaft (11), - wherein the shaft nut (64) is arranged in the space surrounded by the sealing flange (42), and / or wherein the area covered by the shaft nut (64) in the axial direction is encompassed by the area covered by the sealing flange (42) in the axial direction and is arranged axially between the area covered by the bushing (60) in the axial direction and the area covered by the angular contact bearing (12) and by the further bearing (14) in the axial direction, and / or wherein the area covered by the shaft nut (64) in the radial direction, in particular with respect to the axis of rotation of the driving shaft (radial distance area), overlaps with the area covered by the bushing (60) in the radial direction and / or with the area covered by the sealing flange (42) in the radial direction.

5. Gearbox according to one of the preceding claims, characterized in that the sealing lip of the shaft seal ring (62) or the sealing lips of the shaft seal rings (62) seal towards the bushing (60).

6. Gearbox according to one of the preceding claims, characterized in that the first gear (4) is identical to the second gear (5).

7. Gearbox according to one of the preceding claims, characterized in that the rotational speed of the output shaft (11) is always equal to the rotational speed of the second shaft (10).

8. Gearbox according to one of the preceding claims, characterized in that the second housing part (2), in particular the first side wall (48) of the second housing part (2), is in contact with the second side wall (45) of the first housing part (1).

9. Gearbox according to one of the preceding claims, characterized in that the first side wall (46) of the first housing part (1) is spaced apart from the second housing part (2).

10. Gearbox according to one of the preceding claims, characterized in that the first housing part (1 ) is connected to the second housing part (2), in particular in an oil-tight manner.

11. Gearbox according to one of the preceding claims, characterized in that the first housing part (1 ) is made in two parts, wherein the two parts of the first housing part (1 ) are connected to each other at a parting plane which bisects the bearing receptacles of the first bearing of the driven shaft (11 ) and bisects the bearing receptacle of the first bearing of the second shaft (10), wherein the normal direction of the parting plane is oriented perpendicular to the axis of rotation of the driven shaft (11 ).

12. Gearbox according to one of the preceding claims, characterized in that the respective bearing mounts of the output bearings of the output shaft and the second shaft are spaced apart from the parting plane.

13. Gearbox according to one of the preceding claims, characterized in that the second housing part has a third and a fourth side wall, wherein the third side wall is pressed against the second side wall of the first housing part by means of screws, wherein a flat seal is arranged between the second side wall of the first housing part and the third side wall of the second housing part.

14. Gearbox according to one of the preceding claims, characterized in that the first side wall is aligned parallel to and spaced apart from the second side wall, wherein the third side wall is aligned parallel to and spaced apart from the second side wall, wherein the fourth side wall is aligned parallel to and spaced apart from the third side wall.

15. Gearbox according to one of the preceding claims, characterized in that the driven shaft (11) passes through a bearing receptacle formed and / or shaped in the second side wall of the first housing part, in particular in the center, in particular wherein a free space filled at least partially with lubricating oil is arranged between the driven shaft (11) and this bearing receptacle, in particular where no bearing is accommodated in this bearing receptacle.

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