geared motor

Abstract

Geared motor comprising electric motors and a gearbox as well as an adapter which is arranged between the electric motors and the gearbox, wherein the transmission has an input shaft and an output shaft (9), each motor has a rotor shaft, wherein the adapter has a housing-forming adapter flange (10), characterized by the fact that the adapter flange (10) surrounds a summing gearbox for combining the power flows generated by the motors onto the input shaft of the gearbox, at least partially forming a housing, where each motor is permeable to a cooling medium, wherein the motors have an outlet (4) for the cooling medium, wherein channels are formed on the adapter flange (10) which combine the cooling medium exiting at the respective outlet (4) of a motor to a single common outlet (4) on the adapter flange (10). the summing gear has a central gear (62) which is arranged non-rotatably on the input shaft of the gear, wherein each rotor shaft has a toothed section or a toothed part with toothing is non-rotatably connected to each rotor shaft, wherein the pinions (63) are engaged with the central gear (62), wherein the adapter flange (10) is constructed in two parts, such that it has a sheet metal part on which the channels are milled as a groove, the sheet metal part is welded onto the remaining adapter flange (10), wherein the outlet (4) of the motors is each tightly connected to an inlet formed on the adapter flange (10) to a channel (40) or to an inlet (5) formed by the sheet metal part of the adapter flange (10), where the inlet (5) is the mouth of one of the respective channels, In the bearing shield (1) cooling channels of the stator housing (2) of the motor are joined together to a common outlet area (4), wherein in the other bearing shield (3) of the motor the cooling channels of the stator housing (2) of the motor are joined together to form a common opening area as an inlet (5) for the cooling medium.

Description

[0001] The invention relates to a geared motor.

[0002] From EP 1 319 866 B1, a geared motor is known with a single motor housing and several electric motors arranged in motor mounts. A cooling medium is provided between the electric motors, so that the electric motors are not visible from the outside.

[0003] From DE 4402337 A1 a drive system is known which has several electric motors arranged in a motor bearing block.

[0004] From US 2008 / 0 238 098 A1, the closest prior art is known to be a motor system in which the gear parts driven by two motors are directly engaged with each other.

[0005] A geared motor with a summing gearbox is known from EP 1 319 866 A1 and from EP 1 319 866 B1.

[0006] A geared motor with a summing gearbox is also known from DE 44 02 337 A1.

[0007] The invention is therefore based on the objective of further developing a drive system, whereby environmental protection is to be improved.

[0008] According to the invention, the problem is solved in the geared motor according to the features specified in claim 1.

[0009] Key features of the invention for the geared motor are that the geared motor comprises electric motors and a gearbox as well as an adapter which is arranged between the electric motors and the gearbox, wherein the gearbox has an input shaft and an output shaft, each motor has a rotor shaft, wherein the adapter has a housing-forming adapter flange, wherein the adapter flange at least partially surrounds a summing gearbox, in particular for combining the power flows generated by the motors onto the input shaft of the gearbox, forming a housing, wherein the motors are each permeable to a cooling medium, in particular coolant, and are in particular liquid-cooled, the motors have an outlet for the cooling medium, wherein channels are formed on the adapter flange which combine the cooling medium exiting at the respective outlet of a motor to one outlet, in particular to a single common outlet, on the adapter flange.

[0010] A key advantage is the modular design, which allows for quick and easy replacement of each individual motor without requiring a complete drain of the cooling system. Motors are easily replaceable because they are freely accessible from the B-side. They simply need to be detached from the adapter flange and then replaced. Furthermore, the motors are externally visible, making it easy to identify damage such as corrosion. The motor output can also be quickly and easily adjusted to the specific requirements by selecting the appropriate number of motors.

[0011] Furthermore, the respective pinions sit on the respective motor shaft and do not require their own bearings.

[0012] The inlets and outlets are located on opposite sides of the motors. The power output of the individual motors can be summed using the summing gearbox.

[0013] In an advantageous embodiment, the input shaft of the gearbox is mounted in a housing part of the gearbox, in particular a bearing cup. In particular, the housing part is aligned and connected to another housing part of the gearbox by means of a centering collar. An advantage of this is that the central gear is supported together with the driving pinion of the gearbox, i.e., the first toothed section of the first gear stage. Thus, no additional bearing is required for the central gear. Furthermore, an existing gearbox can be easily modified for the purposes of the invention, in which a multi-motor drive is used. Therefore, only minimal modification is necessary. In particular, an adapter that is already required between the motor and gearbox can be retrofitted and equipped with the functions of the invention, i.e., the summing gearbox, the housing for the summing gearbox, the centering mechanism between the gearbox and motors, and the cooling medium supply.

[0014] In an advantageous embodiment, the summing gear has a central gear, in particular a toothed part, in particular a spur gear, which is arranged non-rotatably on the input shaft of the gear. wherein a toothed section is formed on each rotor shaft or a toothed part, in particular a pinion, is connected to the rotor shaft in a rotationally fixed manner with each rotor shaft, The pinions are engaged with the central gear. An advantage of this design is that the summing gearbox does not require its own bearings; instead, all rotatable parts of the summing gearbox utilize the existing bearings of the motor shafts or the input shaft.

[0015] In an advantageous design, the adapter flange forms the housing for the summing gearbox. The advantage here is that a summing gearbox can be integrated into the adapter between the gearbox and the motor, and that this gearbox can be enclosed without bearings but with the function of a housing. Thus, even with a sufficiently sealed design, a lubricant can be used in the summing gearbox. In this case, the adapter flange acts as the housing component for the summing gearbox.

[0016] In an advantageous embodiment, the adapter flange is constructed in two parts, such that it has a sheet metal section in which the channels are formed as recesses, in particular as grooves, and especially milled into the metal. It is advantageous that channels for bringing the cooling medium together can be provided in the adapter flange, particularly in a simple and cost-effective manner.

[0017] In an advantageous embodiment, the motor outlet is each tightly connected to an inlet formed on the adapter flange to form a channel or to an inlet formed by the sheet metal of the adapter flange. In particular, the inlet is the opening of one of the channels. An advantage of this is that the cooling medium flows exiting the motors can be directed into the adapter flange and combined there.

[0018] In an advantageous embodiment, the motors, or rather the pinion gears arranged on the motor rotor shafts, are spaced uniformly apart along the circumference of the gearbox input shaft. This arrangement is advantageous because it achieves a uniform force distribution, thus preventing significant lateral force loads and keeping the bearing load low. Furthermore, this arrangement allows the central gear to be supported on the pinion gears around its circumference, thereby reducing vibrations.

[0019] In an advantageous embodiment, a pinion gear, which is fixedly connected to the rotor shaft of a motor, is supported only by the two bearings of the rotor shaft. The advantage here is that no additional bearings are necessary.

[0020] In an advantageous embodiment, the central gear is mounted together with the transmission input shaft in a housing part, in particular a bearing cup, of the transmission. The advantage here is that no additional bearing is required for the central gear.

[0021] In an advantageous embodiment, the adapter flange has a centering means which can be aligned with a centering means, in particular a centering collar, of the gearbox housing part, especially the bearing cup, wherein the adapter flange and bearing cup are detachably connected, in particular by screws. It is advantageous that the motors can be aligned with the gearbox housing via the adapter flange.

[0022] In an advantageous embodiment, a receptacle, in particular a receiving opening, is arranged on the adapter flange, which has a centering means, in particular a centering collar, against which the bearing shield of a motor is aligned. The advantage here is that centering can be achieved in a simple manner.

[0023] In an advantageous embodiment, cooling channels of the motor's stator housing are combined in the bearing shield and connected to a common outlet area. In particular, the cooling channels of the motor's stator housing are combined in the other end shield of the motor to form a common outlet for the cooling medium. The advantage of this design is that only a single inlet and outlet are necessary. Therefore, a tight seal is only required at this point. The remaining channel structure within the motor components can be easily sealed.

[0024] In an advantageous embodiment, the summing gearbox is lubricated with coolant by means of a continuous opening, in particular a connecting channel, leading from the chamber of the summing gearbox to a channel of the adapter flange. The advantage here is that lubrication can be carried out in a simple manner and therefore requires little effort, especially when oil is used as the coolant.

[0025] Further advantages arise from the dependent claims. The invention is not limited to the combination of features in the claims. For those skilled in the art, further meaningful combinations of claims and / or individual features will be apparent.

[0026] Claim features and / or features of the description and / or the figures, in particular from the problem statement and / or the problem arising from comparison with the prior art.

[0027] The invention will now be explained in more detail with reference to schematic illustrations: In the Fig. Figure 1 shows a drive according to the invention with a gearbox driven by four motors, wherein the torques of the four motors are supplied to the gearbox input shaft via a summing gearbox. In the Fig. Figure 2 shows one of the engines in an oblique view. In the Fig. Figure 3 shows an adapter flange 10 in oblique view. In the Fig. 4 is a sheet metal plate on the adapter flange 10 shown in top view. In the Fig. Figure 5 shows a cross-section through the drive.

[0028] In the drive schematically depicted in the figures, each motor has an output-side A-bearing shield 1, in which a bearing 61 for the rotor shaft of the motor is arranged, and a B-bearing shield 3 at the axially opposite end, i.e., the end facing away from the gearbox, in which a further bearing 59 of the rotor shaft is provided.

[0029] The A-bearing shield 1 and the B-bearing shield 3 are connected by means of the stator housing 2, which encompasses the stator 57. The deflection areas of the stator winding, i.e., winding heads 60, protrude axially from the stator 57.

[0030] The motor shaft 22 carries the rotor assembly 58, to whose axial end region the pinion 63 is connected in a rotationally fixed manner, in particular by means of a keyway connection.

[0031] The motors are of identical construction. Their pinions 63 mesh with the central gear 62, which is rotationally fixed to the input shaft 66 of the gearbox, which carries the driving pinion 67. The input shaft 66 is supported by bearings (55, 65) in a housing part of the gearbox, namely a bearing cup 7, which is connected to the gearbox housing 70. The bearings 55 and 65 are preloaded by means of a shaft nut 64. The gearbox housing 70 contains the output shaft 50 and the meshing gear components, such as pinions 51, 53 and associated gears, as well as the intermediate shafts 52, 54.

[0032] A centering flange 56 is arranged on the bearing cup 7, which is connected to an adapter flange 10 that at least partially surrounds the summing gear, comprising the central gear 62 and the gears 63 engaged in the housing.

[0033] The adapter flange 10 has openings 42 for receiving the motors, in particular for receiving the A-bearing shields 1 of the motors. A centering collar 31 is also arranged at the edge of each opening 42, allowing the motors to be aligned and centered. This enables highly precise positioning of the motors. It also allows cooling medium exiting a motor to be fed to an inlet 30 on the adapter flange.

[0034] Each motor can be cooled by means of the cooling medium, whereby the cooling medium flows through an inlet 5 on the B-bearing shield 3 into channels of the respective motor, which are arranged in the stator housing 2, and at the other axial end, i.e. at the A-bearing shield 1, flows through the motor-side outlet 20 into the adapter-side inlet 30 of the adapter flange.

[0035] This now allows for effective flow and thus also heat dissipation.

[0036] In the adapter flange 10, the incoming cooling medium is combined through channels 40, which are milled into a sheet metal part welded onto the rest of the adapter flange. The combined cooling medium flows can then be discharged through the outlet 4.

[0037] The adapter flange 10 thus serves two purposes: firstly, it acts as a housing component for the summing gearbox, and secondly, it serves to combine and discharge the cooling medium from the individual motors. Furthermore, it connects the motors to the gearbox housing 70 and enables the alignment and centering of the motors relative to the gearbox.

[0038] The gearbox housing 70 thus serves, by means of the bearing cup 7, to support the central gear 62. The motors serve to support the pinions via the motor shaft 22, which is supported in the motor housing.

[0039] Thus, the adapter flange transmits the alignment of the motors to the gearbox housing 70 with associated bearing pot 7.

[0040] As in Fig. As shown in Figure 1, spacers 6 can be provided between the adapter flange 10 and the gearbox housing (8, 70). This allows for better accessibility, especially to the area of ​​the bearing cup 7. Furthermore, the adapter flange can be fixed to fewer surfaces, so that only minimal machining of the gearbox housing (8, 70) is required.

[0041] Each of the motors has an inlet 5 for cooling medium. All inlets 5 can be supplied from a common cooling medium source. The combined cooling medium is discharged at the outlet 4 and preferably routed directly or via a cooler to the cooling medium source.

[0042] The motor-side outlet 20 for cooling medium can be tightly connected to the adapter-side inlet 30 on the sheet metal of the adapter flange by means of a seal on every motor.

[0043] By means of the centering collar 21 arranged on the A-side bearing shield 1, precise alignment of the motors on the centering collar 31 of the adapter flange is made possible, so that the pinion which is rotationally fixed to the motor shaft 22 is precisely aligned with the central gear 62.

[0044] Preferably, the stator housing has axially extending cooling channels spaced apart from each other in the circumferential direction and aligned parallel to each other, wherein the cooling medium guided through the cooling channels is brought together by means of an annular groove arranged in the A-bearing shield 1 and is led out at the motor-side outlet 20.

[0045] The position plate 1 is connected to the stator housing 2 by means of screws which are arranged in the mounting holes 23.

[0046] A centering means 32 for the centering flange is arranged on the adapter flange, by means of which the adapter flange 10 can be centered on the bearing cup 7. Reference symbol list 1 A-bearing plate 2 Stator housings 3 B-Storage Shield 4 Outlet for cooling medium 5 Inlet for cooling medium 6 spacers 7 bearing pot 8 Gearbox housings 9 Output shaft 10 adapter flange 20 Engine-side outlet for cooling medium 21 Centering ring 22 Motor shaft 23 mounting holes 30 adapter-side inlet for cooling medium 31 Centering ring 32 Centering devices for centering flange 40-channel 41 welded sheet metal with welded-in channels 42 Opening for mounting a motor 50 wave 51 sprockets 52 wave 53 sprockets 54 wave 55 warehouses 56 Centering flange 57 Stator 58 Rotor package 59 warehouses 60 winding head 61 warehouses 62 Central wheel 63 sprockets 64 Shaft nut 65 warehouses 66 wave 67 sprockets 68 gear 69 gear 70 Gearbox housings 71 gear

Claims

[1] Geared motor comprising electric motors and a gearbox as well as an adapter arranged between the electric motors and the gearbox, wherein the transmission has an input shaft and an output shaft (9), each motor has a rotor shaft, wherein the adapter has a housing-forming adapter flange (10), characterized by , that the adapter flange (10) surrounds a summing gearbox for combining the power flows generated by the motors onto the input shaft of the gearbox, at least partially forming a housing, where each motor is permeable to a cooling medium, wherein the motors have an outlet (4) for the cooling medium, wherein channels are formed on the adapter flange (10) which combine the cooling medium exiting at the respective outlet (4) of a motor to a single common outlet (4) on the adapter flange (10). the summing gear has a central gear (62) which is arranged non-rotatably on the input shaft of the gear, wherein each rotor shaft has a toothed section or a toothed part with toothing is non-rotatably connected to each rotor shaft, wherein the pinions (63) are engaged with the central gear (62), wherein the adapter flange (10) is constructed in two parts, such that it has a sheet metal part on which the channels are milled as a groove, the sheet metal part is welded onto the remaining adapter flange (10), wherein the outlet (4) of the motors is each tightly connected to an inlet formed on the adapter flange (10) to a channel (40) or to an inlet (5) formed by the sheet metal part of the adapter flange (10), where the inlet (5) is the mouth of one of the respective channels, In the bearing shield (1) cooling channels of the stator housing (2) of the motor are joined together to a common outlet area (4), wherein in the other bearing shield (3) of the motor the cooling channels of the stator housing (2) of the motor are joined together to form a common opening area as an inlet (5) for the cooling medium. [2] Geared motor according to claim 1, characterized by , that the input shaft of the gearbox is mounted in a housing part of the gearbox, wherein the housing part is aligned and connected to another housing part of the gearbox by means of a centering collar. [3] Geared motor according to at least one of the preceding claims, characterized by , that the adapter flange (10) forms the housing for the summing gearbox. [4] Geared motor according to at least one of the preceding claims, characterized bythat the motors, the rotor shafts of the motors and / or the pinion teeth provided on the rotor shafts of the motors are spaced evenly apart in the circumferential direction of the gearbox input shaft. [5] Geared motor according to at least one of the preceding claims, characterized by , that a pinion (51) which is connected to the rotor shaft of a motor in a rotationally fixed manner is supported only by the two bearings of the rotor shaft. [6] Geared motor according to at least one of the preceding claims, characterized by , that the central gear (62) is mounted with the transmission input shaft in a housing part of the transmission. [7] Geared motor according to at least one of the preceding claims, characterized by , that the adapter flange (10) has a centering means (32) which can be aligned on a centering means (32) of the gearbox housing part, wherein the adapter flange (10) and the bearing cup (7) are detachably connected. [8] Geared motor according to at least one of the preceding claims, characterized by , that a receptacle is arranged on the adapter flange (10) which has a centering means (32) on which the bearing shield (1) of a motor is aligned. [9] Geared motor according to at least one of the preceding claims, characterized by , that the summing gear is lubricated with coolant by a through opening (42) leading from the space area of ​​the summing gear to a channel (40) of the adapter flange (10). [10] Geared motor according to at least one of the preceding claims, characterized by that the motors are synchronous motors or at least have permanent magnets. [11] Geared motor according to at least one of the preceding claims, characterized by that three, four, five or six motors are arranged in a row around the circumference

Images