Gearbox with a first housing part and a second housing part

Abstract

Gearbox with a first housing part and a second housing part, wherein 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 gearbox is accommodated in the first side wall, wherein a second bearing of the driving shaft and / or a second bearing of an intermediate shaft of the gearbox is accommodated in the second side wall, wherein a first bearing of the driving shaft is accommodated in the first side wall, wherein an output bearing of the output shaft is accommodated in the second housing part, wherein 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 an output bearing of the second shaft is accommodated in the second housing part, where the second wave is aligned parallel to the driving wave.

Description

[0001] The invention relates to a gearbox with a first housing part and a second housing part.

[0002] It is generally known that a gearbox has a housing part.

[0003] From CN 2 13 393 363 U, a gearbox with a double-shaft output is known as the closest prior art.

[0004] From CN 2 03 413 043 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.

[0005] From DE 10 2017 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.

[0006] A vertical conical double-shaft extruder gearbox is shown from CN 2 03 384 340 U.

[0007] A gearbox with two output shafts is shown in CN 1 10 541 913 A.

[0008] A gearbox with two output shafts is also shown in CN 1 04 121 331 A.

[0009] The output side of a gearbox with two output shafts is shown in CN 1 02 865 351 A.

[0010] A gearbox for twin-screw extruders is known from DE 197 54 359 A1.

[0011] From DE 10 2023 000 999 A1 a gearbox with a first and a second housing part is known.

[0012] A gearbox is known from CN 2 01 386 774 Y.

[0013] A ring rolling mill is known from DE 21 56 269 A.

[0014] A geared motor is known from DE 202 06 979 U1.

[0015] A gearbox is known from CN 1 10 271 163 A.

[0016] From DE 10 2022 001 423 A1 a geared motor with an electric motor driving a gearbox is known.

[0017] A crown wheel gearbox is known from DE 20 2021 104 559 U1.

[0018] A gearbox is known from CN 1 06 838 127 A.

[0019] A screw press is known from DE 19 08 382 U.

[0020] A wave arrangement is known from DE 10 2020 005 857 A1.

[0021] The invention is therefore based on the objective of further developing a gearbox in such a way that an extruder can be driven.

[0022] According to the invention, the problem is solved in the transmission according to the features specified in claim 1.

[0023] Important features of the invention for the gearbox 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 gearbox is accommodated in the first side wall, wherein a second bearing of the driving shaft and / or a second bearing of an intermediate shaft of the gearbox is accommodated in the second side wall, wherein a first bearing of the driving shaft is accommodated in the first side wall, a first gear is non-rotatably connected to the driven shaft, which is in mesh with a second gear that 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, where the second wave is aligned parallel to the outgoing wave, 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 in a bearing flange which is composed of a ring part, a sealing flange in particular of an annular type 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 connected to the second housing part, wherein a slant bearing and another bearing of the driven shaft are accommodated in the hollow flange, in particular hollow bushing, wherein at least one shaft seal, in particular two mutually contacting shaft seals, is or are accommodated in the sealing flange, wherein the at least one shaft seal or the shaft seals seal or seal towards a bushing mounted on the driving shaft, wherein a grease nipple is fitted 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 ring or shaft seal rings are arranged, wherein the ring part is detachably connected to the second housing part, in particular by means of screws.

[0024] 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.

[0025] 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.

[0026] The first and second gears are located outside the first housing part.

[0027] 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 transmission.

[0028] The output bearing can be pre-assembled within the hollow flange. This allows for easy assembly.

[0029] 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.

[0030] 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.

[0031] 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.

[0032] In an advantageous embodiment, a shaft nut is screwed to the driven shaft, - wherein the shaft nut is arranged in the space surrounded by the sealing flange, - and / or wherein the area covered in the axial direction by the shaft nut is encompassed by the area covered in the axial direction by the sealing flange and is arranged axially between the area covered in the axial direction by the bushing and the area covered in the axial direction by the angular contact bearing and the further bearing, - and / or wherein the area covered by the shaft nut in a 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 a radial direction and / or with the area covered by the sealing flange in a radial direction.

[0033] 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.

[0034] 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.

[0035] 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.

[0036] In a preferred embodiment, the rotational speed of the driven shaft always matches the rotational speed of the second shaft. An advantage of this is that the two shafts can be used as an extruder drive. For this purpose, the two shafts are aligned parallel to each other.

[0037] In an advantageous embodiment, the output bearing of the driven shaft has a bearing that is received in the second housing part, and a bearing receiving part, in particular a bearing flange, The bearing housing part incorporates an angular contact bearing for supporting the driven shaft, with the flange part being detachably connected to the second housing part. An advantage of this design is that the second housing part extends axially far enough to accommodate the rolling bearing and the angular contact bearing in axial succession.

[0038] In an advantageous embodiment, the output bearing of the second shaft has a bearing that is received in the second housing part, and a bearing receiving part, in particular a bearing flange, The bearing housing of the output bearing of the second shaft incorporates an angular contact bearing for supporting the driven shaft, with the flange part being detachably connected to the second housing part. An advantage of this design is that the second housing part extends axially far enough to accommodate the rolling bearing and the angular contact bearing in axial succession.

[0039] 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.

[0040] 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.

[0041] In a preferred 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.

[0042] In an advantageous embodiment, the first housing part is made in two parts, The two parts of the first housing section are joined at a parting line that bisects the bearing surfaces of the first bearing of the driven shaft and the bearing surface of the first bearing of the second shaft. An advantage of this design is the ease of manufacturing the gearbox. The intermediate shaft and input shaft, along with their bearings, can be inserted into the first section, and then the second section 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 output shaft and the output bearing of the second shaft are arranged and / or received in the fourth side wall, The third side wall is pressed against the second side wall of the first housing part by means of screws, with a flat gasket positioned between the second side wall of the first housing part and the third side wall of the second housing part. An advantage of this design is that the second housing part can be omitted to create a different gearbox variant, and the second shaft can also be omitted, with the output bearing of the driven shaft being located in the second side wall of the first housing part. This allows for the creation of a gearbox variant with a one-piece output shaft, which is not suitable for extruder applications. In this way, a modular system is created that enables a large number of gearbox 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. where the third side wall is aligned parallel to the second side wall, The fourth side wall is aligned parallel to and spaced apart from the third side wall. An advantage is that the first housing part can also be used for gearbox variants that do not include an extruder drive. In this case, the second housing part and the second shaft are omitted. In an advantageous embodiment, the driven shaft passes through a bearing receptacle formed and / or shaped in the second side wall of the first housing part, particularly in the center. In particular, a free space, at least partially filled with lubricating oil, is arranged between the driven shaft and this bearing housing, meaning that no bearing is actually mounted in this bearing housing. An advantage of this design is that a gearbox variant without the double-shafted extruder drive can be optionally implemented, in which case the second housing part and the second shaft are omitted.

[0047] Further advantages arise from the dependent claims. The invention is not limited to the combination of features of 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, in particular from the problem statement and / or the problem arising from a comparison with the prior art.

[0048] The invention will now be explained in more detail with reference to schematic illustrations: In theFig. 1 shows a cross-section of a non-inventive gearbox. In the Fig. Figure 2 shows the gearbox in a first viewing direction in an oblique view. In the Fig. Figure 3 shows the gearbox from a different viewing direction in an oblique view. In the Fig. Figure 4 shows a cross-sectional view of a gearbox according to the invention. In the Fig. 5 is an excerpt of the Fig. 4 shown enlarged. In the Fig. 6 is an excerpt of the Fig. 5 shown enlarged, where the Fig. Figure 6 shows the components without hatching for better visibility.

[0049] As in the Fig. 1, Fig. 2 to Fig. Figure 3 shows a multi-stage parallel shaft transmission arranged in a first housing part.

[0050] For this purpose, a driving shaft 6 is rotatably mounted via bearings which are received in the first housing part 1.

[0051] 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.

[0052] The driven shaft 11 is rotatably mounted by means of a bearing 7 received in the first housing part 1.

[0053] 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.

[0054] 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 accommodated in a bearing flange 13 that is connected to the second housing part 2, forms the output bearing, i.e. the output-side bearing of the driven shaft 11.

[0055] The driven shaft 11 is connected in a rotationally fixed manner to a gear 4 mounted on it, which is in mesh with a gear 5 that is mounted on a shaft 10 and is connected in a rotationally fixed manner to this shaft 10.

[0056] The shaft 10 is arranged parallel to the driving shaft 11, so that the two shafts are available as an extruder drive.

[0057] 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.

[0058] 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.

[0059] 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.

[0060] The first side wall 46 is arranged on the side of the second side wall 45 facing away from the second housing part 2.

[0061] The second housing part 2 is positioned and aligned so that it touches the second side wall.

[0062] 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.

[0063] The driving shaft 11 is made in one piece, i.e., as a single unit, and preferably protrudes on the side of the second housing part 2 facing away from the driving shaft 6.

[0064] 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.

[0065] In particular, the addition of the second housing part 2 enables a double shaft output.

[0066] 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.

[0067] In the Fig. 4, Fig. 5 to Fig. Figure 6 shows the transmission according to the invention in more detail.

[0068] This differs from the gearbox of the Fig. 1, Fig. 2 to Fig. 3 in that the angular contact bearing 12 is further away from the external environment of the gearbox in the axial direction than bearing 14.

[0069] Another difference in design according to Fig. 4, Fig. 5 to Fig. 6 compared to the version according to Fig. 1, Fig. 2 to Fig. 3 is that when carrying out the procedure according to the Fig. 4, Fig. 5 to Fig. 6 the bearing 14 and also the angular contact bearing 12 are accommodated in the hollow flange 41.

[0070] 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.

[0071] 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 located in a different orientation than in the embodiment according to the Fig. 1, Fig. 2 to Fig. 3 further inwards than bearing 14.

[0072] The sealing flange 42 is ring-shaped and connected to the hollow flange 41.

[0073] Furthermore, a bushing 60 is fitted onto the driven shaft 11.

[0074] 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.

[0075] Furthermore, the shaft nut 64 is arranged axially between the bushing 60 and the bearing 14.

[0076] 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.

[0077] 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.

[0078] The interior of the gearbox is preferably at least partially filled with oil.

[0079] Since bearings 14 and 7 are now further apart than in the design according to the Fig. 1, Fig. 2 to Fig. 3. High lateral forces are tolerable.

[0080] 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 symbol list 1 housing part 2 Housing part 3 warehouses 4 gear 5 gear 6 driving shaft 7 warehouses 8 bearing flange 9 bearings, especially angular contact bearings 10 wave 11 outgoing wave 12 bearings, especially angular contact bearings 13 Bearing flange 14 warehouses 40 ring part 41 Hollow flange 42 Sealing flange 43 first bearing of the driving shaft 6 44 second bearing of the driving shaft 6 45 second side wall of the first housing part 1 46 first side wall of the first housing part 1 47 second side wall of the first housing part 2 48 first side wall of the first housing part 2 60 socket 61 Dust sealing ring 62 Shaft seal 63 grease nipples 64 Shaft nut QUOTES INCLUDED IN THE DESCRIPTION

[0000] This list of documents cited by the applicant was automatically generated and is included solely for the reader's convenience. The list is not part of the German patent or utility model application. The DPMA accepts no liability for any errors or omissions. Cited patent literature

[0000] CN 2 13 393 363 U

[0003] CN 2 03 413 043 U

[0004] DE 10 2017 121 608 A1

[0005] CN 2 03 384 340 U

[0006] CN 1 10 541 913 A

[0007] CN 1 04 121 331 A

[0008] CN 1 02 865 351 A

[0009] DE 197 54 359 A1

[0010] DE 10 2023 000 999 A1

[0011] CN 2 01 386 774 Y

[0012] DE 21 56 269 A

[0013] DE 202 06 979 U1

[0014] CN 1 10 271 163 A

[0015] DE 10 2022 001 423 A1

[0016] DE 20 2021 104 559 U1

[0017] CN 1 06 838 127 A

[0018] DE 19 08 382 U

[0019] FROM 10 2020 005 857 A1

[0020]

Claims

[1] Gearbox comprising 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 accommodated in the second side wall, wherein a first bearing of the driving shaft (11) is received in the first side wall (46), characterized by , 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 driven 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 driven shaft (11) is in a bearing flange which is composed of a ring part (40), a sealing flange (42) in particular of an annular shape, 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), and / or connected to the second housing part (2), wherein a angular contact bearing (12) and a further bearing (14) of the driven shaft are accommodated in the hollow flange (41), in particular a hollow bushing, wherein at least one shaft seal, in particular two mutually contacting shaft seals, is or are accommodated in the sealing flange (42), wherein the at least one shaft seal or the shaft seals seal or seal towards a bushing mounted on the driving shaft (11), wherein a grease nipple (63) is attached and / or arranged in a radial bore of the sealing flange (42), wherein the radial bore opens into the space area surrounded by the sealing flange (42) in which the shaft seal ring or shaft seal rings are arranged, wherein the ring part (40) is detachably connected to the second housing part (2), in particular by means of screws. [2] Gearbox according to claim 1, characterized by , 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 by, 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 any of the preceding claims, characterized by , that a shaft nut (64) is screwed to the driven shaft (11), - wherein the shaft nut (64) is arranged in the space area surrounded by the sealing flange (42), - and / or wherein the area covered in the axial direction by the shaft nut (64) is encompassed by the area covered in the axial direction by the sealing flange (42) and is arranged axially between the area covered in the axial direction by the bushing (60) and the area covered in the axial direction by the angular contact bearing (12) and by the further bearing (14), - and / or wherein the area covered by the shaft nut (64) in a 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 a radial direction and / or with the area covered by the sealing flange (42) in a radial direction. [5] Gearbox according to any of the preceding claims, characterized by , that the sealing lip of the shaft seal (62) or the sealing lips of the shaft seals (62) seal towards the bushing (60). [6] Gearbox according to any of the preceding claims, characterized by that the first gear (4) is identical to the second gear (5). [7] Gearbox according to any of the preceding claims, characterized by , that the rotational speed of the driven shaft (11) is always equal to the rotational speed of the second shaft (10). [8] Gearbox according to any of the preceding claims, characterized by, 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 any of the preceding claims, characterized by , that the first side wall (46) of the first housing part (1) is spaced away from the second housing part (2). [10] Gearbox according to any of the preceding claims, characterized by , 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 any of the preceding claims, characterized by , that the first housing part (1) is designed in two parts, wherein the two parts of the first housing part (1) are joined together 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 aligned perpendicular to the axis of rotation of the driving shaft (11). [12] Gearbox according to any of the preceding claims, characterized by , that the respective bearing mounts of the output bearings of the output shaft and the second shaft are spaced away from the parting plane. [13] Gearbox according to any of the preceding claims, characterized by , that the second part of the housing has a third and a fourth side wall the third side wall is pressed against the second side wall of the first housing part by means of screws, wherein a flat gasket 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 any of the preceding claims, characterized by , that the first side wall is aligned parallel to the second side wall and is spaced away from it, where the third side wall is aligned parallel to the second side wall, wherein the fourth side wall is aligned parallel to the third side wall and spaced apart from it. [15] Gearbox according to any of the preceding claims, characterized by , that the driving 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 middle, in particular wherein a free space at least partially filled with lubricating oil is arranged between the driving shaft (11) and this bearing receptacle, in particular where no bearing is accommodated in this bearing receptacle.

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