Gearbox with housing

Abstract

Gearbox with housing, wherein a trough for oil guidance and reducing splashing losses surrounds a peripheral section of a toothed part, in particular a gear wheel (100), in particular in the radial and axial directions, wherein the tub is composed of at least three parts, i.e. at least a base plate (103) and two side walls, wherein the base plate (103) is screw-connected to the two side walls, wherein the trough has a recess, in particular a channel, in particular at its deepest surface area, in particular at the surface area having the greatest radial distance, in particular wherein, upon rotation of the gear (100), oil is conveyed from the oil sump of the transmission through the recess between the tub and the gear (100), in particular to a higher position than the level of the oil sump, wherein the base plate (103) and the side walls are stamped and bent parts, characterized in that the trough is fastened to the housing lower part (2), which has a wave structure (6), wherein the base plate (103) has tab sections (120) extending in the radial direction, to which the side walls are screw-connected by means of a screw connection, wherein the recess, in particular the channel, is delimited by the base plate (103) and the two side walls, wherein the base plate (103) and each side wall (102) are each formed integrally, i.e. in one piece.

Description

[0001] The invention relates to a gearbox with a housing.

[0002] It is generally known that a gearbox housing has bearing receptacles in which the bearings of the gearbox shafts are accommodated and the corresponding forces are diverted. The closest state of the art known from DE 203 12 235 U1 is a wheelset transmission for use in rail vehicles. A gearbox is known from SU 983 361 A1. A vehicle with a gearbox is known from DE 10 2006 034 153 A1. A gearbox is known from JP H06- 18 754 U. DE 612 984 A discloses a splash lubrication system for a gear transmission. A lubrication system for a gearbox is known from US 2 676 671 A1. A cooling device for a transmission is known from US 4 414 861 A. A gearbox with a split housing is known from CN 2 02 833 968 U. A gearbox with a split housing is also known from CN 2 665 468 Y.

[0003] The invention is therefore based on the object of protecting the environment, in particular conserving resources.

[0004] According to the invention, the object is achieved in the housing for a transmission according to the features specified in claim 1.

[0005] Important features of the invention in the gearbox with housing are that a trough for oil guidance and reducing splashing losses surrounds a peripheral section of a toothed part, in particular a gear wheel, in particular in the radial and axial direction, wherein the tub is composed of at least three parts, i.e. at least a base plate and two side walls, wherein the base plate is screwed to the two side walls, the tray is attached to the housing, wherein the trough has a recess, in particular a channel, in particular at its deepest surface area, in particular at the surface area having the greatest radial distance, in particular, wherein, upon rotation of the gear, oil is conveyed from the oil sump of the transmission through the recess between the tub and the gear, in particular to a higher position than the level of the oil sump, The base plate and side walls are stamped and bent parts.

[0006] The advantage here is that oil can be pumped from the gearbox's oil sump to a higher location, such as an intermediate reservoir or a collecting trough, by means of the gear, and from there the bearings and meshing gears can be lubricated with lubricating oil. In addition, splashing losses can be reduced by means of the pan, which at least partially follows the contour of the gear, i.e. the envelope of the rotating gear, i.e. the cylindrical spatial area touched by the rotating gear. To this end, the gap between the rotating gear and the pan, in particular the base plate of the pan, must be designed to be small. The base plate, with its surface section facing the gear, is arranged at a radial distance that is only slightly different from the radial distance between the tips of the gear teeth and the gear axis.#Thus, the surface section of the base plate facing the gear extends substantially in the circumferential direction and in the axial direction, but, with the exception of a recess, always has the same radial distance from the axis of the gear, in particular from the axis of the shaft to which the gear is connected in a rotationally fixed manner.

[0007] The design of the tub from only three parts, namely the base plate and side walls, enables particularly cost-effective production by screwing these parts together.

[0008] In an advantageous embodiment, the distance, particularly the radial distance, between the base plate and the heads of the gear teeth is constant within the circumferential angular range covered by the tub. The advantage here is that a small gap is sufficient to achieve the pumping effect. Thus, splashing losses can be reduced.

[0009] According to the invention, the base plate has tab sections extending in the radial direction, to which the side walls are screwed together. The advantage here is that the tab sections can be easily produced by bending a stamped sheet. Furthermore, the tab section can be aligned parallel to the side wall, i.e. perpendicular to the surface section of the base plate extending in the circumferential and axial directions. This makes it possible to achieve a simple, stable connection between the base plate and the side wall. This is particularly true for a gearbox series which uses gears of different sizes, since a different gear ratio can be implemented for each gearbox in the gearbox series. This means that the base plate must be fastened at an adapted radial distance and the axially aligned screws of the screw connection between the base plate and the side wall must therefore be spaced at different radial distances.

[0010] In an advantageous embodiment, a side wall has a marking at which a borehole can be made for the passage of a screw of the screw connection. This is advantageous because, depending on the gear ratio of the transmission or the size, in particular the tip diameter, of the gear, a borehole can be made at a different marked radial distance, thus allowing the tray to be arranged at a different radial distance.

[0011] According to the invention, the recess, in particular the channel, is defined by the base plate and the two side walls. This is advantageous because an oil-promoting recess can be manufactured simply and cost-effectively.

[0012] According to the invention, the base plate and each side wall are each formed as a single piece. The advantage here is that each of the three parts can be manufactured as a stamped and bent part, making it very simple and cost-effective. Even the two side walls can be constructed identically.

[0013] In an advantageous embodiment, the housing is provided for a gearbox, wherein the housing has an upper housing part and a lower housing part, wherein the upper housing part has a frame-like support section on which wall sections are formed, wherein the frame-like support section is formed integrally with the wall sections, i.e. in one piece, in particular as a cast part, in particular as a cast steel part.

[0014] The advantage here is that only the load-bearing section requires a lot of material, and therefore mass, while the wall sections do not. This allows high forces to be transmitted in a material-saving manner.

[0015] In an advantageous embodiment, the maximum wall thickness of the wall sections is smaller than the maximum wall thickness of the support section. This is advantageous because the wall sections can be designed with a thinner wall thickness, thus allowing the housing to be constructed with less material.

[0016] In an advantageous embodiment, the frame-like support section of the upper housing part has a first and a second transverse rib, in particular wherein the transverse ribs extend mainly in the horizontal direction, in particular being further extended in the horizontal direction than in any direction transverse thereto, wherein the frame-like support section has two first ribs, wherein the two first ribs are spaced apart from each other and are each connected to the first transverse rib, in particular at two spaced apart locations, in particular wherein the first ribs extend mainly in the vertical direction, in particular being further extended in the vertical direction than in any direction transverse thereto, wherein the two second ribs are spaced apart from each other and are each connected to the second transverse rib, in particular at two spaced apart locations, In particular, the second ribs extend primarily in the vertical direction, i.e., in particular, they are further extended in the vertical direction than in any direction transverse thereto. This is advantageous in that particularly high stability can be achieved with minimal material expenditure. This is because the frame-like support section has a rectangular shape, in which the rectangle is bent out of the plane of the rectangle on its two opposite sides, so that the bent regions are arranged essentially in further planes perpendicular to the plane, which are spaced apart from one another and parallel.

[0017] In an advantageous embodiment, each first rib and each second rib has a support eyelet at the end region facing away from the respective transverse rib. This is advantageous because the forces introduced into the housing during transport are transferred directly into the frame-like support section and not into thin wall sections.

[0018] In an advantageous embodiment, a first rib is connected at its end region to a beam, in particular a supporting beam, which is connected at its other end to the end region of a second rib, wherein the other rib is connected at its end region to a beam, in particular a supporting beam, which in turn is connected at its other end to the end region of the other second rib, In particular, the two beams are arranged parallel and spaced apart from each other. The advantage here is that high stability can be achieved through the bracing.

[0019] In an advantageous embodiment, a shaft of the gearbox is mounted in the housing by means of a bearing, wherein a first part of the bearing receptacle is arranged in the upper housing part and a second part of the bearing receptacle is arranged in the lower housing part, The first part of the bearing support is designed as a thickened section and is connected to the area of ​​the transverse ribs to which the respective rib is also connected. It is advantageous that additional bracing of the frame-like support section is provided by means of the thickened areas.

[0020] In an advantageous embodiment, a housing cover closes an opening in the upper housing part 1, which is enclosed by the frame-shaped support section, in particular at a distance, in particular such that the frame-shaped support section does not directly touch the opening, but is spaced from the opening. This is advantageous in that transmission components can be inspected and maintenance work can be performed through the opening. Furthermore, no lubricating oil flows out of the transmission, since the opening is located on the top side of the upper housing part.

[0021] Important features of the gearbox are that it is provided with a housing, whereby a shaft of the gearbox is mounted in the housing by means of a bearing, wherein a first part of the bearing receptacle is arranged in the upper housing part and a second part of the bearing receptacle is arranged in the lower housing part, wherein the first part of the bearing support is designed as a thickened section and is connected to that area of ​​the transverse ribs to which the respective rib is also connected.

[0022] The advantage is that high torsional rigidity and high mechanical stability can be achieved.

[0023] 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.

[0024] The invention will now be explained in more detail with the aid of illustrations: In the Fig. 1 shows a gear housing according to the invention for a gear in a first viewing direction in an oblique view, which is composed of an upper housing part 1 and a lower housing part 2. In the Fig. 2, the gear housing according to the invention is shown in a different viewing direction in an oblique view. In the Fig. 3 shows the gear housing according to the invention in a third viewing direction in an oblique view. In the Fig. 4 shows the lower housing part 2 in an oblique view. In the Fig. 5 shows the upper housing part 1 in an oblique view. In the Fig. 6 shows the frame-like supporting section of the upper housing part 1. In the Fig. 7 shows a side wall section 3 as a section of the upper housing part 1, which is inserted into the frame-like support section. In the Fig. 8 shows a section of the lower housing part 2 of a wall section with a wave structure, in particular a concave-convex wall section. In the Fig. 9 shows the oil level 90. In the Fig. 10 shows a gear wheel 100 of the transmission, which is arranged in a rotationally fixed manner on a shaft 101 mounted in the transmission housing and is at least partially surrounded by a trough fastened to the housing lower part 2. In the Fig. 11, the tub itself is shown in an oblique view, wherein the tub has side walls 102 and a base plate 103. In the Fig. 12 shows a side wall 102 of the tub. In the Fig. 13 shows the base plate 103 of the tub.

[0025] As in Fig. As shown in Figure 1, the lower housing part 2 is arranged below the upper housing part 1. In the vertical direction, the upper housing part 1 is arranged above the lower housing part 2.

[0026] The upper housing section 1 has a frame-like support section, which absorbs and transmits the majority of the forces. The remaining sections of the upper housing section 1 are designed solely for the oil-tight enclosure of the gearbox interior, i.e., they are constructed with thinner walls than the support section and fit snugly against the support section.

[0027] Thus, the upper housing part 1 and the lower housing part 2 are shaped like a shell.

[0028] The frame-like support section of the housing upper part 1 has a first transverse rib 62. This extends mainly in the horizontal direction.

[0029] Two first ribs 61 are spaced apart from each other and are each connected to the first transverse rib 61, in particular at two spaced apart locations.

[0030] The first ribs 61 extend mainly in the vertical direction, i.e. they are further extended in the vertical direction than in any direction transverse thereto.

[0031] The frame-like support section of the housing upper part 1 also has a second transverse rib 62. This extends mainly in the horizontal direction.

[0032] Two second ribs 61 are spaced apart from each other and are each connected to the second transverse rib 61, in particular at two spaced apart locations.

[0033] The second ribs 61 extend mainly in the vertical direction, i.e. they are further extended in the vertical direction than in any direction transverse thereto.

[0034] Each first rib 61 and each second rib 61 has a lifting eye 63 at its end region facing away from the respective transverse rib. Thus, the gearbox can be attached to the lifting eyes using a hook or rope and is easily transported. The forces occurring during transport are transferred via the lifting eyes 63 into the end regions and thus into the frame-like support section. Thus, the gearbox housing is only slightly deformed and remains undamaged.

[0035] A first rib 61 is connected at its end region to a beam 60, in particular a supporting beam, which is connected at its other end to the end region of a second rib 61. Likewise, the other rib 61 is connected at its end region to a beam 60, in particular a supporting beam, which in turn is connected at its other end to the end region of the other second rib 61. The two beams 60 are arranged parallel and spaced apart from each other.

[0036] As described above, wall sections are nestled against the frame-like support section of the housing upper part 1 formed from the ribs 61, transverse ribs 62 and beams 60, so that the shell-like housing upper part can be formed in one piece, in particular as a cast part.

[0037] In this case, the wall sections, in particular also two side wall sections 3 and the wall section with a concave-convex wave structure, are formed and nestled against the frame-like support section and are formed in one piece.

[0038] The beams 60 extend mainly in the horizontal direction, i.e. they are wider horizontally than in any transverse direction.

[0039] The frame-like supporting section is therefore realized by thickening the wall thickness.

[0040] Additionally, thickened areas are provided on the upper housing part 1, which serve as bearing supports for at least part, in particular half, of the circumference of an outer ring of a bearing. These arcuately shaped, adjacent, thickened areas are connected to the transverse ribs 62, in particular in the end region in which the respective rib 61 is connected.

[0041] The concave-convex wave structure of the wall sections increases the surface area and thus reduces the heat transfer resistance to the ambient air. A particularly deep recess is provided as recess 5 for the operating area for screw connections. The screws not shown in the figures are connecting screws with which the upper housing section 1 and the lower housing section 2 are screwed together.

[0042] The housing lower part 2 has a wave structure 6, in particular a concave-convex wall section, which also increases the surface area and thus reduces the heat transfer resistance from the gear interior, in particular lubricating oil, to the ambient air.

[0043] The housing cover is provided for closing an opening in the upper housing part 1, which opening is enclosed by the frame-shaped support section, in particular at a distance. This means that the frame-shaped support section does not directly touch the opening but is spaced from it.

[0044] As in Fig. As shown in Figure 10, the gear 100 is rotationally fixedly connected to the shaft 101, which is mounted in the housing via a bearing. The bearing is accommodated in a bearing recess of the housing, with a first part of the bearing recess being arranged in the upper housing part 1 and a second part of the bearing recess being arranged in the lower housing part 2.

[0045] The lower space surrounding the gear 100 is enclosed by the tub, which has side walls 102 and a base plate 103. It can thus be manufactured from three pieces.

[0046] The side walls 102 of the trough are attached to the base plate 103. The base plate 103 has a downwardly directed protrusion 130 at its lowest point. The protrusion 130 is directed radially away from the gear and is open at its radially outer end. Thus, lubricating oil of the transmission passes from the transmission's oil sump through the protrusion 130 to the gear 100. Laterally, i.e., on both sides in the axial direction, the protrusion is closed by a respective tab section 120 of the side walls 102, forming a channel extending radially through to the gear 100.

[0047] As from Fig.12, the side walls 102 are each punched out as a sheet metal part and have markings on their axial outer side which indicate the positions of drill holes to be drilled, in particular depending on the gear ratio of the transmission and / or toothing data of the gear wheel 100.

[0048] Screws are passed through the drill holes, which enable a screw connection between the base plate 103 and the respective side wall 102 to be carried out.

[0049] Depending on the size or other gearing data, the base plate can be arranged at an optimal radial distance from the gear center axis.

[0050] The base plate 103 is also manufactured as a stamped and bent part and has a U-shaped cross-section. It is bent in such a way that the distance between the teeth, particularly the tips of the teeth of the gear 100 located at the same circumferential angle as the base plate 103, is constant. Thus, a narrow gap is provided between these tooth tips and the base plate 103.

[0051] When the gear 100 rotates, a pumping effect is created, as the lubricating oil in the tooth gaps moves at a higher speed than the lubricating oil in the channel. In this way, lubricating oil is transported through the channel from the oil sump to the gear 100 and then moved along by it.

[0052] The trough also reduces splashing losses during movement of the gear 100. This is because the engagement of the teeth of the gear 100 takes place in the space surrounded by the trough.

[0053] The U-shaped curved base plate 103 is circularly curved in the circumferential direction with the exception of the tab sections 120 and the protuberance 130, so that the distance between the teeth of the toothing of the gear 100 and the base plate 103 is substantially constant in the corresponding circumferential angle range.

[0054] The tab sections 120 are directed radially outwards, so that the respective side wall 102 can be pressed and screwed onto the base plate 103, in particular onto its tab sections 120, in the axial direction.

[0055] By means of the pumping action of gear 100 in conjunction with the pan, oil is pumped to a position higher than the oil level in the oil sump and from there, via an intermediate reservoir or directly to the points to be lubricated, such as bearings or meshing gears. Appropriate lines or pipes are provided for this purpose.

[0056] The protrusion 130 can be produced by bending it out of the original shape of the base plate 103. For this purpose, a stamped sheet is bent such that two circularly bent regions are spaced apart by a substantially rectangularly bent region. The circularly bent regions are then pressed together, thus forming the circular region of the base plate 103. The circularly bent regions encompass a recess. The rectangularly bent region also has a centrally arranged recess, thus forming the protrusion 130. List of reference symbols 1 upper housing part 2 Housing base 3 side wall section 4 housing covers 5 Recess for operating area for screw connections 6 Wave structure, especially concave-convex wall section 60 bars 61 rib 62 transverse rib 63 eyelets 90 Oil level 100 gears 101 Wave 102 side wall 103 Base plate 120 tab section 130 protrusion

Claims

[1] Gearbox with housing, wherein a trough for oil guidance and reducing splashing losses surrounds a peripheral section of a toothed part, in particular a gear wheel (100), in particular in the radial and axial directions, wherein the tub is composed of at least three parts, i.e. at least a base plate (103) and two side walls, wherein the base plate (103) is screw-connected to the two side walls, wherein the trough has a recess, in particular a channel, in particular at its deepest surface area, in particular at the surface area having the greatest radial distance, in particular wherein, upon rotation of the gear (100), oil is conveyed from the oil sump of the transmission through the recess between the tub and the gear (100), in particular to a higher position than the level of the oil sump, wherein the base plate (103) and the side walls are stamped and bent parts, characterized by , that the trough is fastened to the housing lower part (2), which has a wave structure (6), wherein the base plate (103) has tab sections (120) extending in the radial direction, to which the side walls are screw-connected by means of a screw connection, wherein the recess, in particular the channel, is delimited by the base plate (103) and the two side walls, wherein the base plate (103) and each side wall (102) are each formed integrally, i.e. in one piece. [2] Transmission according to claim 1, characterized by that the distance, in particular the distance in the radial direction, between the base plate (103) and the heads of the toothing is constant in the circumferential angular range covered by the trough. [3] Transmission according to one of the preceding claims, characterized bythat a side wall (102) has a marking on which a borehole for passing through a screw of the screw connection can be made. [4] Transmission according to one of the preceding claims, characterized by , that the housing has an upper housing part (1) and a lower housing part (2), wherein the upper housing part (1) has a frame-like support section on which wall sections are formed, wherein the frame-like support section is formed integrally with the wall sections, i.e. in one piece, in particular as a cast part, in particular as a cast steel part. [5] Transmission according to claim 4, characterized by that the maximum wall thickness of the wall sections is smaller than the maximum wall thickness of the load-bearing section. [6] Transmission according to claim 4 or 5, characterized by , that the frame-like support section of the housing upper part (1) has a first and a second transverse rib (62), in particular wherein the transverse ribs (62) extend mainly in the horizontal direction, in particular being further extended in the horizontal direction than in any direction transverse thereto, wherein the frame-like support section has two first ribs (61), wherein the two first ribs (61) are spaced apart from each other and are each connected to the first transverse rib (62), in particular at two spaced-apart locations, in particular wherein the first ribs (61) extend mainly in the vertical direction, in particular being further extended in the vertical direction than in any direction transverse thereto, wherein the two second ribs (61) are spaced apart from each other and are each connected to the second transverse rib (62), in particular at two spaced apart locations, in particular wherein the second ribs (61) extend mainly in the vertical direction, in particular being further extended in the vertical direction than in any direction transverse thereto. [7] Transmission according to one of the preceding claims, characterized by that each first rib (61) and each second rib (61) has a carrying eyelet (63) at its end region facing away from the respective transverse rib (62). [8] Transmission according to one of the preceding claims, characterized by , that a first rib (61) is connected at its end region to a beam (60), in particular a supporting beam, which is connected at its other end to the end region of a second rib (61), wherein the other rib (61) is connected at its end region to a beam (60), in particular a supporting beam, which in turn is connected at its other end to the end region of the other second rib (61), in particular wherein the two beams (60) are arranged parallel and spaced from each other. [9] Transmission according to one of claims 4 to 8, characterized by that a housing cover (4) closes an opening of the housing upper part (1), which opening is enclosed by the frame-shaped support section, in particular at a distance, in particular so that the frame-shaped support section does not directly touch the opening, but is spaced from the opening. [10] Transmission according to one of the preceding claims, characterized by , that a shaft (101) of the gearbox is mounted in the housing by means of a bearing, wherein a first part of the bearing receptacle is arranged in the upper housing part (1) and a second part of the bearing receptacle is arranged in the lower housing part (2), wherein the first part of the bearing receptacle is designed as a thickened section and is connected to that region of the transverse ribs (62) to which the respective rib (61) is also connected.

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