Gearbox comprising a gearbox housing

Abstract

gearbox comprising a gearbox housing and to form a first torque transmission path and / or power branch, - a driving shaft (10) supported by means of bearings (13) received in the gearbox housing with at least one non-rotatably connected toothed part, - a hollow shaft (20) supported by means of bearings (23, 24) in the gearbox housing, with at least one toothed part connected in a rotationally fixed manner, - a further hollow shaft (30) supported by means of bearings (33, 34) in the gearbox housing, with at least one gear non-rotatably connected to it, - an output shaft (50) supported by means of bearings (16) in the gearbox housing, with at least one non-rotatably connected toothed part, wherein the hollow shaft (20) and the further hollow shaft (30) are axially spaced apart from each other and torque can be transmitted between the hollow shaft (20) and the further hollow shaft (30) by means of a torsion bar (40), wherein the torsion bar (40) is connected to a bushing (41) in a rotationally fixed but axially displaceable manner, wherein the bushing (41) is connected to the hollow shaft (20) in a rotationally fixed but axially displaceable manner, wherein the bushing (41) is mounted on the torsion bar (40), wherein the bushing (41) is axially limited in a first direction by a nut (42) screwed onto the torsion bar (40) and screwed onto the torsion bar (40), wherein the bushing (41) is axially limited in the other direction by means of a diameter step step of the inner diameter of the hollow shaft.

Description

[0001] The invention relates to a transmission comprising a transmission housing.

[0002] It is generally known that gearboxes have a gearbox housing in which bearings are provided for supporting shafts to which gearing parts are connected in a rotationally fixed manner.

[0003] From DE 1 983 360 U, a multi-way transmission is known as the closest state of the art.

[0004] A power-split transmission is known from GB 943 383 A.

[0005] An improved gearbox is known from GB 718 645 A.

[0006] The invention is therefore based on the object of designing a transmission in a cost-effective manner for high power or output torque.

[0007] According to the invention, the object is achieved in the transmission having a transmission housing according to the features specified in claim 1.

[0008] Important features of the invention in the transmission are that it has a transmission housing and

[0009] In particular, to form a first torque transmission path and / or power branch, - a driving shaft supported by bearings accommodated in the gearbox housing with at least one toothed part connected in a rotationally fixed manner, - a hollow shaft supported by bearings accommodated in the gearbox housing with at least one toothed part connected in a rotationally fixed manner, - a further hollow shaft mounted by means of bearings accommodated in the gearbox housing with at least one non-rotatably connected gear, - an output shaft supported by bearings accommodated in the gearbox housing with at least one toothed part connected in a rotationally fixed manner, wherein the hollow shaft and the further hollow shaft are axially spaced from each other and torque can be transmitted between the hollow shaft and the further hollow shaft by means of a torsion bar.

[0010] The advantage of this is that manufacturing tolerances and loads on both torque transmission paths are compensated. This allows the herringbone gear components to self-center axially, while still allowing torque to be transmitted from the first to the second gear stage via the torsion bar. This makes herringbone gear components advantageous. Unlike simple helical gears, herringbone gears do not generate any axial force when transmitting torque.

[0011] In an advantageous embodiment, the transmission has a second torque transmission path and / or the transmission is power-split, where the gearbox - a hollow shaft of the second path supported by bearings accommodated in the gearbox housing with at least one toothed part of the second path connected in a rotationally fixed manner and - a further hollow shaft of the second path supported by bearings accommodated in the gearbox housing with at least one gear wheel of the second path connected in a rotationally fixed manner has, The hollow shaft of the second path and the further hollow shaft of the second path are also axially spaced from each other, and torque can be transmitted between the hollow shaft of the second path and the further hollow shaft of the second path by means of a torsion bar of the second path. The advantage here is that a power split can be implemented and the power can be distributed symmetrically. Each power branch is thus evenly loaded.

[0012] In an advantageous embodiment, the second path is constructed symmetrically to the first path, in particular so that the hollow shaft and the further hollow shaft together with the toothed parts, bearings and gears of the two paths connected to these hollow shafts are arranged and designed mirror-symmetrically to each other, The mirror plane contains the shaft axis of the output shaft and is aligned perpendicular to the plane containing the shaft axes of the hollow shaft and the output shaft. This allows for a simple transmission design and the power distribution is designed in such a way that the same parts can be used in each case.

[0013] In an advantageous embodiment, the shaft axes of the input shaft, the output shaft, the hollow shaft, the further hollow shaft, the hollow shaft of the second path and the further hollow shaft of the second path are aligned parallel to each other, In particular, the shaft axis of the input shaft is aligned coaxially with the shaft axis of the output shaft. The advantage here is that the torque transmission from the first to the second gear stage can be carried out in a simple manner.

[0014] In an advantageous embodiment, the torsion bar is guided through the hollow shaft and the further hollow shaft. This provides the advantage of a simple structure.

[0015] In an advantageous embodiment, the torsion bar is connected in a rotationally fixed manner, particularly fixedly, to the further hollow shaft. This is advantageous in that the torque transmitted by the torsion bar can be easily transmitted without losses. In an advantageous embodiment, the torsion bar is connected in a rotationally fixed but axially displaceable manner to a bushing. and / or the bushing is connected to the hollow shaft in a rotationally fixed but axially movable manner, In particular, the bushing is mounted on the torsion bar. The advantage here is that the bushing acts as a coupling, thus allowing for further compensation of manufacturing tolerances.

[0016] In an advantageous embodiment, the bushing is hollow. This allows for a low moment of inertia, as the bushing is positioned between the hollow shaft and the torsion bar. This prevents the torsion bar from directly contacting the hollow shaft, ensuring the coupling effect is fully effective.

[0017] In an advantageous embodiment, the bushing has an internal toothing for a rotationally fixed connection with an external toothing of the torsion bar, and / or that The bushing has external gearing for a rotationally fixed connection with the internal gearing of the hollow shaft. The advantage here is that the bushing can be constructed as a single piece, yet still allows for radial gearing on both sides.

[0018] In an advantageous embodiment, the bushing is axially limited, particularly in a first direction, by a nut that is screwed to the torsion bar, particularly by a nut that is screwed onto the torsion bar. In particular, the bushing is axially limited in the other direction by a diameter step of the inner diameter of the hollow shaft. This is advantageous in that a limitation on both sides is easy to implement, thus allowing the axial play to be defined.

[0019] In an advantageous embodiment, the torsion bar is widened, particularly radially widened, at the axial end region facing away from the hollow shaft in such a way that the further hollow shaft is axially limited by this widening. This is advantageous because a simple, safety-enhancing limitation can be implemented.

[0020] In an advantageous embodiment, the respective toothed part is composed of two helical gears, the helix angle of the respective toothing being equal in amount but with a different sign, In particular, the two gears of the respective gearing part are detachably connected to one another by means of axially through-running screws, in particular such that there is no gap between the gears. This is advantageous in that self-centering is possible because the hollow shaft and the further hollow shaft are arranged so as to be axially displaceable relative to one another, in particular in the axial region defined by the boundaries.

[0021] In an advantageous embodiment, the toothed part connected in a rotationally fixed manner to the input shaft is in engagement with the toothed part connected in a rotationally fixed manner to the hollow shaft and / or The gear part that is non-rotatably connected to the output shaft engages with the gear that is non-rotatably connected to the other hollow shaft and / or a toothing of the other hollow shaft. It is advantageous that the herringbone gears of the gear parts can be provided in a self-centering manner relative to one another.

[0022] Further advantages emerge from the dependent claims. The invention is not limited to the combination of features in the claims. Further possible combinations of claims and / or individual claim features and / or features of the description and / or the figures will become apparent to those skilled in the art, particularly from the problem and / or the problem posed by comparison with the prior art.

[0023] The invention will now be explained in more detail with the aid of illustrations: In the Fig. 1 shows a sectional view through a transmission according to the invention.

[0024] In the Fig. Figure 2 shows a front view of the gearbox.

[0025] As shown in the figures, the torque applied via the input shaft 10 is branched and transmitted to the output shaft 50 via two torque transmission paths. The two paths are symmetrical to each other.

[0026] A first helical gear 11 and a second helical gear 12 are connected in a rotationally fixed manner to the input shaft 10, wherein the helix angles of the two gears 11 and 12 have the same amount of helix angle, but have different signs.

[0027] The two gears 11 and 12 are connected to each other, in particular by means of axially through screws, so that there is no gap between the teeth of the two gears (11, 12).

[0028] The gear 11 is in engagement with a third gear 21, the gear 12 is in engagement with a fourth gear 22.

[0029] The third and fourth gears (21, 22) are each mounted on a hollow shaft 20 and are connected in a rotationally fixed manner to the hollow shaft 20. Furthermore, the two gears (21, 22) are each provided with a corresponding helical toothing and are connected to each other, in particular by means of axially through-running screws, so that there is no gap between the toothings of the two gears (21, 22).

[0030] The hollow shaft 20 is supported by two spaced-apart bearings (23, 24) accommodated in the housing.

[0031] The input shaft 10 is supported by two spaced-apart bearings (13, 14) accommodated in the housing.

[0032] The output shaft 50 is supported by two spaced-apart bearings (15, 16) accommodated in the housing.

[0033] Another hollow shaft 30 is supported by two spaced-apart bearings (34, 33) housed in the housing. The additional hollow shaft is also arranged coaxially with the hollow shaft 20. A torsion bar 40 extends through both hollow shafts (20, 30).

[0034] The further hollow shaft 30 has helical external teeth that mesh with the gear 51, which is connected in a rotationally fixed manner to the output shaft 50 and is correspondingly helical. Furthermore, the gear 51 is connected to the gear 52 by means of axially through-running screws, so that there is no gap between the teeth of the two gears (51, 52). A seventh gear 31 is again helical, is connected in a rotationally fixed manner to the further hollow shaft 30, and meshes with

[0035] The helix angles of the two gears 51 and 52 have the same amount of helix angle, but with a different sign.

[0036] The torsion bar 40 is axially widened at its first axial end region, so that the further hollow shaft 30 adjacent to the widening of the torsion bar 40 is axially limited.

[0037] The torsion bar 40 is connected in a rotationally fixed manner to the further hollow shaft 30. For this purpose, the torsion bar 40 is preferably firmly connected to the further hollow shaft 30, for example, by welding and / or screwing.

[0038] In the other axial end region, the torsion bar 40 has a toothing that engages with the internal toothing of a bushing 41, in particular a sleeve. The toothing and the internal toothing extend in the axial direction. Thus, the bushing 41 is connected to the torsion bar 40 in a rotationally fixed but axially displaceable manner.

[0039] The bushing 41 also has an external toothing which engages with an internal toothing of the hollow shaft 20, wherein these two toothings also extend in the axial direction, so that the bushing 41 and the hollow shaft 20 are arranged in a rotationally fixed but axially displaceable manner.

[0040] The torsion bar enables axial balancing of the additional hollow shaft 30 and hollow shaft 20. Furthermore, load balancing between the two paths is achieved. This also enables a kinematically correct connection of the two symmetrically constructed paths without prestress or preload.

[0041] The two paths are constructed such that the shaft axes of the hollow shaft 20 of the first and second paths, the further hollow shaft 30 of the first and second paths, the input shaft 10, and the output shaft 10 are arranged parallel to each other and in a common plane. The shaft axes of the input shaft 10 and the output shaft 10 are aligned coaxially with each other.

[0042] The ratio of the number of teeth of the internal toothing of the bushing 41 to the number of teeth of the external toothing of the bushing 41 is prime to each other. Therefore, the two tooth numbers do not have a common integer factor greater than one. This allows the rotational position of the bushing 41 to be determined during manufacturing, i.e., during insertion of the bushing 41, without the need for any index position.

[0043] The position of the bushing 41 is secured by a nut 42 screwed to the torsion bar 40 at its end facing away from the second gear stage. For this purpose, the torsion bar 40 has an external thread in this end area. The nut 42 thus axially limits the bushing 41.

[0044] The input shaft 10 and the output shaft 50 are axially spaced from each other. Furthermore, the hollow shaft 20 and the further hollow shaft 30 of the first path are also spaced from each other. The hollow shaft 20 and the further hollow shaft 30 of the second path are also axially spaced from each other.

[0045] Thus, the first gear stage, comprising the hollow shaft 20 with its gears 11, 12, 21, 22 and input shaft 10, and the second gear stage, comprising the hollow shaft 30 with the gears 31, 51, 52 and output shaft 50, are accommodated separately and axially independently of one another in the gear housing.

[0046] The transmission of torque from the first to the second gear stage takes place via the torsion bar 40. This allows a flexible connection, which provides the elimination or compensation of load peaks, in particular load torque shocks, as well as the compensation of manufacturing tolerances. List of reference symbols 10 Driving shaft 11 first gear with helical teeth 12 second gear with helical teeth 13 camps 14 camps 15 warehouses 16 warehouses 20 hollow shaft 21 third gear with helical teeth 22 fourth gear with helical teeth 23 camps 24 warehouses 30 hollow shaft with helical gearing 31 seventh gear with helical teeth 33 camps 34 warehouses 40 torsion bar 41 Bushing, especially sleeve 42 mother 50 Abortive Wave 51 fifth gear with helical teeth 52 sixth gear with helical teeth

Claims

[1] Transmission comprising a transmission housing and to form a first torque transmission path and / or power branch, - a driving shaft (10) mounted by means of bearings (13) accommodated in the gear housing with at least one toothed part connected in a rotationally fixed manner, - a hollow shaft (20) mounted by means of bearings (23, 24) accommodated in the gear housing with at least one toothed part connected in a rotationally fixed manner, - a further hollow shaft (30) mounted by means of bearings (33, 34) accommodated in the gear housing with at least one gear wheel connected in a rotationally fixed manner, - an output shaft (50) mounted by means of bearings (16) accommodated in the gear housing, with at least one toothed part connected in a rotationally fixed manner, wherein the hollow shaft (20) and the further hollow shaft (30) are axially spaced from one another and torque can be transmitted between the hollow shaft (20) and the further hollow shaft (30) by means of a torsion bar (40), wherein the torsion bar (40) is connected to a bushing (41) in a rotationally fixed but axially displaceable manner, wherein the bushing (41) is connected to the hollow shaft (20) in a rotationally fixed but axially displaceable manner, wherein the bushing (41) is placed on the torsion bar (40), wherein the bushing (41) is axially limited in a first direction by a nut (42) screwed to the torsion bar (40) and screwed onto the torsion bar (40), wherein the bushing (41) is axially limited in the other direction by means of a diameter step of the inner diameter of the hollow shaft. [2] Transmission according to claim 1, characterized by , that the transmission has a second torque transmission path and / or the transmission is power-split, where the gearbox - a hollow shaft (20) of the second path supported by bearings (23, 24) accommodated in the gear housing with at least one toothed part of the second path connected in a rotationally fixed manner and - a further hollow shaft (30) of the second path, mounted by means of bearings (34) accommodated in the gear housing, with at least one gear wheel (11) of the second path connected in a rotationally fixed manner has, wherein the hollow shaft (20) of the second path and the further hollow shaft (30) of the second path are axially spaced from one another and torque can be transmitted between the hollow shaft (20) of the second path and the further hollow shaft (30) of the second path by means of a torsion bar (40) of the second path. [3] Transmission according to at least one of the preceding claims, characterized by , that the second path is symmetrical to the first path, such that the hollow shaft (20) and the further hollow shaft (30) together with the toothed parts, bearings (23, 24, 33, 34) and gears of the two paths connected to these hollow shafts are arranged and designed mirror-symmetrically to each other, wherein the mirror plane contains the shaft axis of the output shaft (50) and is oriented perpendicular to the plane containing the shaft axes of the hollow shaft (20) and the output shaft (50). [4] Transmission according to at least one of the preceding claims, characterized by , that the shaft axes of the input shaft (10), the output shaft (50), the hollow shaft (20), the further hollow shaft (30), the hollow shaft (20) of the second path and the further hollow shaft (30) of the second path are aligned parallel to each other, wherein the shaft axis of the input shaft (10) is aligned coaxially with the shaft axis of the output shaft (50). [5] Transmission according to at least one of the preceding claims, characterized by that the torsion bar (40) is guided through the hollow shaft (20) and the further hollow shaft (30). [6] Transmission according to at least one of the preceding claims, characterized by that the torsion bar (40) is connected in a rotationally fixed manner to the further hollow shaft (30). [7] Transmission according to at least one of the preceding claims, characterized by that the bushing (41) is hollow. [8] Transmission according to at least one of the preceding claims, characterized by , that the bushing (41) has an internal toothing for a rotationally fixed connection with an external toothing of the torsion bar (40), and / or that the bushing (41) has an external toothing for a rotationally fixed connection with an internal toothing of the hollow shaft (20). [9] Transmission according to at least one of the preceding claims, characterized by that the torsion bar (40) is widened at the axial end region facing away from the hollow shaft (20) in such a way that the further hollow shaft (30) is axially limited by this widening. [10] Transmission according to at least one of the preceding claims, characterized by , that the gearing parts are herringbone and / or two-part, and / or that the respective gearing part is composed of two helical gears, the helix angle of which has the same amount but a different sign, wherein the two gears of the respective toothed part are detachably connected to each other by means of axially through screws. [11] Transmission according to at least one of the preceding claims, characterized by , that the toothed part connected to the input shaft (10) in a rotationally fixed manner is in engagement with the toothed part connected to the hollow shaft (20) in a rotationally fixed manner and / or that the toothed part connected in a rotationally fixed manner to the output shaft (50) is in engagement with the gear wheel connected in a rotationally fixed manner to the further hollow shaft (30) and / or a toothing of the further hollow shaft.

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