Gearbox with housing parts, especially with two identical housing parts

Description

[0001] The invention relates to a gearbox with housing parts, in particular with two housing parts that are identical to each other.

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

[0003] A gearbox housing is shown from CN 111 998 059 A.

[0004] A housing for a gearbox is known from DE 10 2013 018 709 A1.

[0005] A gearbox with a housing is known from DE 10 2013 000 518 A1.

[0006] A housing for a gearbox is known from DE 10 2008 004 337 A1.

[0007] A spur gear transmission is known from DE 10 2004 030 180 A1.

[0008] From DE 818 716 U, a housing for a worm gear is known as the closest prior art.

[0009] A gearbox is known from CN 212744987 U.

[0010] The invention is therefore based on the objective of further developing a gearbox with a housing, wherein the housing should be compact, cost-effective and easy to manufacture, and the gearbox should be operable in different orientations.

[0011] According to the invention, the problem is solved in the transmission according to the features specified in claim 1.

[0012] Key features of the invention in the gearbox are that the gearbox is designed with two identical housing parts. wherein the two housing parts are connected to each other, wherein cooling fins are formed on each housing part, wherein base plates for setting up the gearbox on a preferably flat floor surface are held by webs which are connected to a respective housing part, in particular welded together, wherein each web encompasses cooling fins which project between the housing part and the web, wherein the base plates are spaced apart from the housing part, in particular wherein the base plates are welded together with the webs.

[0013] A key advantage is that the base plates are spaced apart from the housing by means of the struts, allowing cooling airflow between the housing, the base area, and the struts. This enables efficient heat dissipation from the gearbox, resulting in high performance in a compact design. The use of two identical housing parts allows for mass production of a large number of these housings, thus reducing costs. Furthermore, manufacturing is very simple, as only two identical housing parts need to be joined together to produce the gearbox housing.

[0014] Since the two housing parts are identical, inverting the housing—that is, rotating it 180° so that the upper housing part acts as the lower housing part and vice versa—allows for a different orientation of the gearbox. The gearbox functions as intended in both orientations. In particular, the oil circuit remains functional, with the shaft end pump drawing oil from the oil sump and forcing it through an oil filter before it is supplied to the interior. The piping is designed in such a way that operation can continue uninterrupted even when the housing is inverted.

[0015] In an advantageous embodiment, each web is U-shaped and / or has two spaced-apart leg sections, each connected by a yoke of the web, in particular wherein a first leg section of the respective web is connected to the respective housing part and the other leg section of the respective web is connected to a respective base plate. It is advantageous that the webs function as connecting areas and the yoke as a spacing area. In this way, the housing part is spaced away from the base area, thus allowing a cooling airflow to pass underneath the housing part.

[0016] In an advantageous embodiment, the cooling fins are arranged between the respective yoke and the respective housing part, in particular wherein the yoke is spaced apart from the housing part. It is advantageous that the cooling airflow between the cooling fins, viewed from the housing part, can pass below the yoke or web.

[0017] In an advantageous embodiment, the webs are spaced apart from one another and arranged one behind the other along a straight line. It is advantageous that the cooling airflow, viewed from the housing part, can pass below the webs, particularly in a direction parallel to the axis of rotation of the driving shaft.

[0018] In an advantageous embodiment, the webs arranged one behind the other along the straight line are identical to each other, with the exception of a first web, on which an eyelet is additionally molded, and a second web, on which an eyelet is additionally molded. This design offers the advantage of easy transport. Furthermore, the eyelet can also be used during assembly, thus simplifying the process.

[0019] In an advantageous embodiment, the bearing receptacles of the gearbox are formed half in the first housing part and the other half in the second housing part, wherein the bearing receptacles have a greater wall thickness, in particular at least five times greater, than the wall thickness of the remaining housing part. It is advantageous that the bearing receptacles are divided, i.e., they are not located in a single part, but rather can be arranged half in each of the parts.

[0020] In an advantageous embodiment, the first leg of each web is connected to a bearing receptacle, and the other leg of each web is connected to one of the gearbox's base plates. It is advantageous that the base plates are spaced apart from the housing part, thus allowing a cooling airflow between them.

[0021] In an advantageous embodiment, the contact surface of the two housing parts is contained in a parting plane, in particular a split plane, with the base plates each being aligned parallel to the parting plane of the gearbox. It is advantageous that the parting plane bisects the bearing mounts, thus creating a simple interface between the two housing parts.

[0022] In a preferred design, each housing part is connected to two base plates. This has the advantage of enabling stable positioning of the gearbox.

[0023] In an advantageous embodiment, the first and / or input gear stage of the transmission is an angle gear stage. The cooling fins are aligned parallel to the axis of rotation of the input shaft of the gearbox, in particular the bevel gear stage, and the input shaft is oriented perpendicular to the output shaft of the gearbox. An advantage of this is that a fan can be driven by the input shaft, which conveys an airflow along the cooling fins parallel to the axis of rotation of the input shaft.

[0024] In an advantageous embodiment, a shaft end pump is arranged on a shaft of the transmission, in particular on an intermediate shaft of the transmission, and is driven by the shaft. The shaft pump is connected to a multi-way valve, in particular a three-way or two-way valve, wherein a first connection of the shaft pump is optionally connected via the multi-way valve, depending in particular on the switching state of the multi-way valve, either to a first oil line opening into a bore through the wall of the first housing part, or to a second oil line opening into a bore through the wall of the second housing part, in particular so that the shaft pump can draw oil from the oil sump of the gearbox, especially when the multi-way valve is in the appropriate switching state. It is advantageous that the shaft pump draws oil from the oil sump, with the gearbox being installed in the first or second orientation, i.e., either with the first housing part as the lower housing part or alternatively with the second housing part as the lower housing part.

[0025] In an advantageous embodiment, the second port of the shaft-end pump is connected via an oil line to an oil filter, from which a further oil line leads to a bore passing through the first housing part, in particular wherein the first port of the shaft-end pump is connected to the second port of the shaft-end pump via a safety valve, especially a pressure relief valve. It is advantageous that the oil is filtered. Furthermore, the oil filter is located on the outside of the gearbox, so that the oil is cooled.

[0026] In an advantageous embodiment, a fan is connected to the driving shaft, A fan shroud is connected to the two housing parts and at least partially surrounds the fan, forming part of the housing, and in particular, the airflow driven by the fan is guided along the cooling fins. An advantage of this design is that a passively driven fan can be used, thus generating a stronger cooling airflow at high speeds.

[0027] In an advantageous embodiment, at least two spaced-apart base plates are arranged on each of the housing parts, in particular wherein the base plates connected to the respective housing part are aligned parallel to each other. It is advantageous that a base plate can be provided on each longitudinal side of the housing part. This enables stable positioning.

[0028] In an advantageous embodiment, either the first housing part is arranged below the second housing part in the direction of gravity and / or the first housing part is placed on a floor surface with its feet, or the second housing part is arranged below the first housing part in the direction of gravity and / or the second housing part is placed on a floor surface with its feet. An advantage of this is that the gearbox can be set up in two orientations.

[0029] 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.

[0030] The invention will now be explained in more detail with reference to schematic illustrations: In the Figure 1 A gear unit according to the invention is shown in an oblique view. Figure 2 The gearbox is shown in side view. Figure 3 The gearbox housing is shown in an oblique view from a first viewing angle. In the Figure 4 is the case different from the Figure 3 shown from a different perspective. In the Figure 5 A front view of the gearbox is shown. In the Figure 6 The gearbox is shown again in a side view. In the Figure 7 The inverted gearbox, i.e. rotated by 180°, is shown in side view.

[0031] As shown in the figures, the gearbox has a housing composed of two identically designed housing parts 1.

[0032] Therefore, the gearbox, as by comparison of the Figure 6 and 7Easily recognizable, it can be placed upside down on the floor, i.e., rotated 180°. This is because each of the two housing parts 1 is connected to a base plate 2, by means of which the gearbox can be placed on the floor.

[0033] Each of the housing parts 1 is provided with cooling fins 3 on its outer surface.

[0034] The webs 4, which encompass the cooling fins, are connected to both the respective housing part 1 and the base plate 2 of the respective housing part 1.

[0035] The housing thus functions as a split housing.

[0036] The second of the two housing parts 1 is placed on top of the first of the two housing parts 1, so that the mutual contact surface of the two housing parts 1 is contained in the split plane.

[0037] The bearing receptacles for receiving rolling bearings for the shafts of the gearbox, in particular for the driven shaft, at least one intermediate shaft and the driving shaft of the gearbox, are also divided by the split plane, in particular wherein the respective half of the bearing receptacle is arranged in the first housing part 1 and the other half is arranged in the other housing part 1.

[0038] The struts 4 are preferably welded on one side to a respective base plate 2 and on the other side to the respective housing part 1.

[0039] The webs 4 encompass the cooling fins 3 in such a way that the respective cooling fins 3 are arranged between the respective webs 4 and the respective housing part.

[0040] The cooling fins 3 enclosed by the respective web 4 are spaced apart from each other and arranged parallel to each other. The cooling channels formed between the cooling fins 3 thus extend between the respective web 4 and the respective housing part 1.

[0041] On each side of the respective housing part 1, the webs 4 are arranged one behind the other along a straight line.

[0042] Preferably the webs 4 are identical to each other, but along the line a first of the webs 4 has an additional outwardly projecting eyelet and a last of the webs 4 also has an outwardly projecting eyelet.

[0043] The feet protrude from the housing section towards the ground by means of the struts 4. This is because the respective struts 4 are attached to the respective housing section 1 and hold the respective foot plate 2.

[0044] In addition, cooling fins are also formed on the side of the housing part facing the ground, which are spaced apart from each other and extend parallel, in particular perpendicular to the direction of the axis of rotation of the output shaft of the gearbox.

[0045] By spacing the base plates 2 from the housing part 1, an airflow guided by the ribs can pass between the floor, in particular the floor surface of the floor which should be as flat as possible, and the housing part 1.

[0046] The gearbox housing, composed of the two housing parts 1, therefore has cooling fins 3 on almost all sides. This ensures improved heat dissipation.

[0047] As described above, an airflow can be guided along all sides of the gearbox housing parallel to the axis of rotation of the driving shaft, flowing between cooling fins 3.

[0048] The foot plates 2 of the housing part 1 which is located on the side of the housing part 1 facing away from the ground act as additional cooling fins or cooling vanes, as they also increase the surface area.

[0049] The wall thickness of the respective housing part 1 in the area of ​​the bearing mounts is greater, in particular at least five times greater, than the wall thickness of the housing part 1 in that area of ​​the housing part 1 in which the cooling fins are arranged.

[0050] These areas of the bearing mounts protrude into the surroundings, particularly beyond the cooling fins 4, due to the thickened wall thickness.

[0051] The webs 4 are attached to these areas of the bearing mounts, in particular by welding. Therefore, the webs 4 also protrude beyond the cooling fins into the surrounding area.

[0052] Each bridge 4 is U-shaped or at least has a U-shaped basic structure.

[0053] The axis of rotation of the input shaft is perpendicular to the axis of rotation of the output shaft. Therefore, the first gear stage is designed as a right-angle gear stage, and the subsequent gear stages are parallel shaft gear stages, in particular spur gear stages.

[0054] The respective housing part 1 is chamfered in the area of ​​the first gear stage. Thus, the first gear stage is preferably designed as a bevel gear stage.

[0055] The slope on the front of the housing part 1 is designed such that the housing part at the front has a preferably strictly monotonically decreasing distance to the driven shaft from the bearing receptacle for the bearing of the driving shaft with decreasing distance to the base plates 2.

[0056] A shaft end pump is arranged on the first intermediate shaft of the gearbox, i.e., on the driven shaft of the first gearbox stage.

[0057] The oil flow delivered by the shaft end pump is directed through an oil filter 21 and from there back into the oil sump of the gearbox.

[0058] The shaft end pump 6 and the oil filter are mounted externally on the gearbox and / or accessible from the external environment.

[0059] The necessary oil line from the shaft end pump to the oil filter 21 is attached to the outside of the gearbox. The oil line from the oil filter back to the oil sump is also attached to the outside and terminates in a bore through the housing part 1.

[0060] As in the Figure 6As shown, a multi-way valve, in particular a three-way valve, is attached to the outside of the gearbox, so that the suction side of the shaft end pump 6 is optionally connected to a first oil line that opens into a bore through the wall of the first housing part, or to a second oil line that opens into a bore through the wall of the second housing part. Thus, the oil can be drawn from the oil sump by the shaft end pump, whereby the multi-way valve must be adjusted accordingly.

[0061] As in Figure 7 As shown, the gearbox can also be operated when it is rotated by 180°, i.e., turned upside down. This is because only the multi-way valve 5 needs to be switched so that oil can be drawn from the oil sump, now located in the other housing part 1, by the shaft end pump.

[0062] The oil conveyed through the oil filter 21 is, in the execution according to Figure 7 fed into the interior through a bore in the upper housing part 1.

[0063] A fan is non-rotatably connected to the driving shaft. An air guide hood 7 directs the airflow conveyed by the fan along the cooling fins 3, so that an airflow moves along all four sides of the essentially cuboid housing part 1.

[0064] The fan hood 7 is preferably connected to both housing parts 1 and covers the beveled areas.

[0065] Preferably, the oil pipes and oil lines are located in the airflow conveyed by the fan, so that the oil conveyed by the shaft end pump is also cooled.

[0066] Preferably, the suction side of the shaft end pump is connected to the pressure side of the shaft end pump 6 via a safety valve 20, in particular a pressure relief valve.

[0067] In further embodiments according to the invention, in Figure 6 The shaft pump is operated in reverse, so that the oil is drawn from the oil sump of the first housing part 1, i.e., the lower housing part 1, and fed through the oil filter 21 to the shaft pump. The oil pumped by the shaft pump is then supplied to the other housing part 1 via the oil line leading from the multi-way valve 5 to the bore of the upper housing part 1.

[0068] Preferably, oil lines are arranged inside the gearbox, which carry the oil supplied through the bore to lubrication points, in particular bearings and gears. The oil thus flows to the lubrication points by gravity.

[0069] When executed according to Figure 7 , that is, in comparison to the Figure 6 With the gearbox turned upside down, the shaft end pump continues to operate in the same way and the oil flow remains the same as with the gearbox. Figure 6 . Reference symbol list

[0070] 1 Housing part 2 Base plate 3 Cooling fins 4 Bridge 5 Multi-way valve 6 Shaft end pump 7 Air guide hood 20 Safety valve, especially pressure relief valve 21 Oil filter

Claims

1. A gear unit having two identically configured housing parts (1), wherein the two housing parts (1) are connected to one another, wherein base plates (2), for setting up the gear unit on a preferably plane floor surface, are held by elongated members (4) which are connected to a respective housing part (1), in particular connected by welding, wherein the base plates (2) are spaced apart from the housing part (1), in particular wherein the base plates (2) are connected to the elongated members (4) by welding, characterised in that cooling ribs (3) are formed on each housing part (1), wherein each elongated member (4) surrounds cooling ribs (3) which project between the housing part (1) and the elongated member (4).

2. A gear unit according to claim 1, characterised in that each elongated member (4) is U-shaped and / or has two limb regions which are spaced apart from one another and which are in each case connected to a yoke of the elongated member (4).

3. A gear unit according to claim 2, characterised in that the cooling ribs (3) are arranged between the respective yoke and the respective housing part (1).

4. A gear unit according to any one of the preceding claims, characterised in that the elongated members (4) are spaced apart from one another and are arranged one behind the other along a straight line.

5. A gear unit according to claim 4, characterised in that the elongated members (4) arranged one behind the other along the straight line are configured identically except for a first elongated member (4), on which additionally a lug is formed, and a second elongated member (4), on which additionally a lug is formed.

6. A gear unit according to any one of the preceding claims, characterised in that bearing receivers of the gear unit are half in the first housing part (1) and the respective other half of the bearing receivers is in the second housing part (1), wherein the bearing receivers have a greater wall thickness than the wall of the remaining housing part (1).

7. A gear unit according to any one of claims 2 to 6, characterised in that the first limb of the respective elongated member (4) is connected to a bearing receiver and the other limb of the respective elongated member (4) to one of the base plates (2) of the gear unit.

8. A gear unit according to any one of the preceding claims, characterised in that the contact surface of the two housing parts (1) is contained in a separating plane, wherein the base plates (2) are each oriented parallel to the separating plane of the gear unit.

9. A gear unit according to any one of the preceding claims, characterised in that each housing part (1) is connected to two base plates (2) in each case.

10. A gear unit according to any one of the preceding claims, characterised in that a first gear-unit stage of the gear unit is an angular gear stage and in that the cooling ribs (3) are oriented parallel to the rotational axis of the input shaft of the gear unit.

11. A gear unit according to any one of the preceding claims, characterised in that a shaft end pump (6) is arranged on a shaft of the gear unit, in particular on an intermediate shaft of the gear unit, and is driven by the shaft, wherein the shaft end pump (6) is connected to a multi-port valve (5), in particular three-way valve or two-way valve, wherein a first connection of the shaft end pump (6) is connected via the multi-port valve (5), in particular dependent on the switching state of the multi-port valve (5), • either to a first oil pipe which opens in a bore passing through the wall of the first housing part (1), • or to a second oil pipe which opens in a bore passing through the wall of the second housing part (1).

12. A gear unit according to claim 11, characterised in that the second connection of the shaft end pump (6) is connected via an oil line to an oil filter (21) from which a further oil line runs to a bore passing through the first housing part (1).

13. A gear unit according to any one of the preceding claims, characterised in that a fan is connected to the input shaft, wherein a fan cover is connected to the two housing parts (1) and at least partially surrounds the fan in a housing-forming manner.

14. A gear unit according to any one of the preceding claims, characterised in that at least two base plates (2) spaced apart from one another are arranged on a respective one of the housing parts (1).

15. A gear unit according to any one of the preceding claims, characterised in that either the first housing part (1) is arranged underneath the second housing part (1) in a gravitational direction and / or the first housing part (1) is set up with its base surfaces on a floor surface or in that the second housing part (1) is arranged underneath the first housing part (1) in a gravitational direction and / or the second housing part (1) is set up with its base surfaces on a floor surface.