Compact drive

Abstract

Compact drive comprising a central housing part (16) arranged between a space for gearbox and a space for electric motor, wherein the output shaft and the rotor shaft (21) of the electric motor are arranged parallel to each other, the transmission is designed with multiple stages, in particular with three stages, wherein a bearing of the rotor shaft (21), a bearing (8, 9) of each intermediate shaft and a bearing of the output shaft are accommodated in the central housing part (16), wherein the stator (22) of the electric motor is frictionally connected to the central housing part (16) by elastically deforming at least a projecting area of ​​the central housing part (16) such that the stator (22) is frictionally held in the central housing part (16), wherein a space is provided for an electronic circuit that at least supplies and / or controls or regulates the electric motor, wherein the space area is enclosed by a lower part (25) and a housing cover (13) placed on this lower part (25) to form a housing, wherein electrical connection devices are provided in the lower part (25), wherein the stator laminated stack (22) is composed of individual segments, wherein a bearing of the output shaft and a bearing (8, 9) of each intermediate shaft are accommodated in a housing cover (1) which is screwed to the central housing part (16), characterized by the fact that Several parallel recesses (14) are provided on the attached housing cover (13), which extend over at least two or three sides of the housing cover (13), which is designed as a cuboid box.

Description

[0001] The invention relates to a compact drive comprising a central housing part.

[0002] From DE 10 2008 015 686 A1, a compact drive with a central housing part is known as a subsequently published prior art.

[0003] A compact drive is known from DE 10 2006 060 865 A1.

[0004] A compact drive is also known from WO 2007 / 076 976 A1.

[0005] A cuboid compact drive is known from DE 10 2004 054 601 A1.

[0006] The invention is based on the objective of further developing a compact drive.

[0007] According to the invention, the problem is solved in the compact drive according to the features specified in claim 1.

[0008] Key features of the invention in the compact drive are that the compact drive comprises a central housing part that is arranged between a space for the gearbox and a space for the electric motor, wherein the output shaft and the rotor shaft of the electric motor are arranged parallel to each other, the transmission is designed with multiple stages, in particular with three stages, ISI\ET X:\01-Industrial Property Rights\01 Patents\01.01 Filing\PT5585\PT5585-DE\PT5585-DE-006-bescherw-001-Fine Copy.doc 14.06.2023 wherein a bearing of the rotor shaft, one bearing of each intermediate shaft and one bearing of the output shaft are accommodated in the central housing part, wherein the stator of the electric motor is frictionally connected to the central housing part by elastically deforming at least a projecting area of ​​the central housing part (16) such that the stator is frictionally held in the central housing part, wherein a space is provided for an electronic circuit that at least supplies and / or controls or regulates the electric motor, wherein the space area is enclosed by a lower part and a housing cover placed on this lower part, forming a housing, where electrical connection devices are provided in the lower part, the stator's laminated core is composed of individual segments, wherein a bearing of the output shaft and one bearing of each intermediate shaft are accommodated in a housing cover which is screwed to the central housing part.

[0009] An advantage of this is that a central housing component is provided, which ensures stability for the geared motor and at the same time centrally collects and dissipates the heat generated.

[0010] In an advantageous embodiment, the elastic deformation of the projecting area can be achieved by screwing a screw into it. A further advantage is that a simple fastener can be used.

[0011] In an advantageous embodiment, the central housing part and the lower part are manufactured as a single piece, or the lower part and the housing cover are manufactured as a single piece, forming a box. The advantages of this design include simple, cost-effective manufacturing and the ability to ensure a high level of sealing.

[0012] In an advantageous embodiment, a separately projecting torque support is provided on the housing part, the support point of which lies outside the central housing part and has a distance from the central housing part that is at least greater than the diameter of the output shaft. The advantage here is that high torques can be supported.

[0013] In another advantageous embodiment, the torque support is provided at the bearing flange or the housing cover, particularly at a radial distance that is smaller than the largest diameter of the output shaft. This has the advantage of enabling compact drive solutions.

[0014] In a preferred embodiment, a holding device, such as a retaining eyelet, is provided on the central housing part. This is advantageous because it facilitates easy transport and the holding forces are applied to the central, and therefore heavier, housing part. This prevents the remaining parts of the compact drive from being subjected to high loads and thus ensures the compact drive's integrity.

[0015] According to the invention, several parallel recesses are provided on the attached housing cover, extending over at least two or three sides of the housing cover, which is designed as a cuboid box. An advantage of this is that it enables an attractive and easily recognizable design, thus achieving high brand recognition among the relevant trade circles if the manufacturer of the compact drive uses these recesses to identify its products.

[0016] In a preferred embodiment, cable glands and indicators for displaying the operating status of the compact drive are provided in the lower section. An advantage of this design is that electrical supply lines can be routed easily and securely, and the drive's status, e.g., normal operation or fault condition, is readily apparent.

[0017] In an advantageous embodiment, several parallel, arc-shaped recesses are provided on at least one or two side faces of the outer surface of the central housing part. The advantage of this is that it enables an attractive, easily recognizable design, thus achieving high brand recognition among the relevant market circles if the manufacturer of the compact drive uses these recesses to identify its products.

[0018] In an advantageous embodiment, gears are positively engaged on the intermediate shafts by means of a keyway connection, in particular wherein the gear teeth are helical or spur. An advantage of this is that noise can be reduced.

[0019] In an advantageous embodiment, a pinion gear is provided on the axial end region of the rotor shaft. The advantage here is that the toothing provided on the rotor shaft can be manufactured simply.

[0020] In an advantageous embodiment, one or all intermediate shafts are designed as pinion shafts, i.e., they have teeth. The advantage here is that cost-effective manufacturing of the toothed shafts is possible and the teeth can be centered very precisely on the shaft.

[0021] Further advantages arise from the sub-claims.

[0022] The invention will now be explained in more detail with the help of illustrations: In the Fig. 1, Fig. 2, Fig. 3, Fig. 4, Fig. 5, Fig. 6, Fig. 7, Fig. 8 to Fig. Figure 9 shows a first embodiment. In the Fig. 10, Fig. 11, Fig. 12, Fig. 13, Fig. 14, Fig. 15, Fig. 16, Fig. 17 to Fig. Section 18 shows a second embodiment. In the Fig. 19, Fig. 20, Fig. 21, Fig. 22, Fig. 23, Fig. 24, Fig. 25, Fig. 26 to Fig. 27 shows a third embodiment. In the Fig. 28, Fig. 29, Fig. 30, Fig. 31, Fig. 32, Fig. 33, Fig. 34, Fig. 35, Fig. 36 to Fig. A fourth embodiment is shown in section 37. In the Fig. Figure 1 shows an oblique view of the first embodiment. In the Fig. Figure 2 shows an exploded view of the parts. In the Fig. Figure 3 shows a cutaway example. In the Fig. Figure 4 shows a top view of an exemplary embodiment. In the Fig. Figure 5 shows a rear view of an exemplary embodiment. In the Fig. Figure 6 shows a side view of an exemplary embodiment. In the Fig. Figure 7 shows the corresponding opposite side view. In the Fig. Figure 8 shows a view of an exemplary embodiment from below. In the Fig. Figure 9 shows a front view of an exemplary embodiment. In the Fig. Figure 10 shows an oblique view of the second embodiment. In the Fig. Figure 11 shows an exploded view of the parts. In the Fig. Figure 12 shows a cutaway example. In the Fig. Figure 13 shows a top view of an exemplary embodiment. In the Fig. Figure 14 shows a rear view of an exemplary embodiment. In the Fig. Figure 15 shows a side view of an exemplary embodiment. In the Fig. Figure 16 shows the corresponding opposite side view. In the Fig. Figure 17 shows a view of an embodiment from below. In the Fig. Figure 18 shows a front view of an exemplary embodiment. In the Fig. Figure 19 shows an oblique view of the third embodiment. In the Fig. Figure 20 shows an exploded view of the parts. In the Fig. Figure 21 shows a cutaway example. In the Fig. Figure 22 shows a top view of an exemplary embodiment. In the Fig. Figure 23 shows a rear view of an exemplary embodiment. In the Fig. Figure 24 shows a side view of an exemplary embodiment. In the Fig. Figure 25 shows the corresponding opposite side view. In the Fig. Figure 26 shows a view of an embodiment from below. In the Fig. Figure 27 shows a front view of an exemplary embodiment. In the Fig. Figure 28 shows an oblique view of the fourth embodiment. In the Fig. Figure 29 shows an exploded view of the parts. In the Fig. Figure 30 shows a cutaway example. In the Fig. Figure 31 shows a top view of an exemplary embodiment. In the Fig. Figure 32 shows a rear view of an exemplary embodiment. In the Fig. Figure 33 shows a side view of an exemplary embodiment. In the Fig. Figure 34 shows the corresponding opposite side view. In the Fig. Figure 35 shows a view of an embodiment from below. In the Fig. Figure 36 shows a front view of an exemplary embodiment.

[0023] In the first embodiment, a central housing part 16 is provided, onto which a housing cover 1 is screwed on the front, i.e. output side, which is tightly connected and to which a torque support 3 is screwed by means of screws 2.

[0024] Furthermore, a bearing 4 for the output shaft is provided in the housing cover 1, to which the gear 5 is positively connected by means of a keyway connection. The other bearing of the output shaft is accommodated in the central housing part 16.

[0025] The gear 5 engages with the teeth of a pinion shaft 7, to which a gear 6 is also positively connected by means of a keyway connection. The pinion shaft 7 is supported as an intermediate shaft via the bearing 8 in the housing cover 1 and via another bearing in the central housing part 16.

[0026] The gear 6 engages with a toothed section of the pinion shaft 10, to which another gear 11 is positively connected. The pinion shaft 10 is supported by a bearing 9 in the housing cover 1 and by another bearing in the central housing part 16.

[0027] The gear 11 is driven by a pinion 12 which is connected to the rotor shaft 21 by friction and / or form locking.

[0028] The rotor shaft 21 of the electric motor is supported by its pinion-side bearing in the central housing part 16 and by its other bearing in the bearing shield 23, which is secured in a receptacle of the central housing part 16.

[0029] The described bearing receptacles in the central housing part 16 are provided in one of its walls. This ensures high stability and maintains a very high degree of accuracy in the center-to-center distance, as the bearing receptacles can be machined in a single setup on a machining center.

[0030] The engine compartment and the gearbox compartment, which is partially filled with lubricating oil, are separated from each other by this wall and can therefore be easily sealed. The heat generated during operation within these two compartments is thus largely absorbed and dissipated by the wall.

[0031] Another compartment is designated for electronics and is also sealed. This compartment is enclosed and protected by a frame-like lower section 25 mounted on the central housing part 16 and the housing cover 13 placed on top of it. Furthermore, the heat generated in this compartment is dissipated to the environment via this lower section 25 and the housing cover 13. The housing cover 13 has parallel recesses 14 on its outer surface, extending across several sides of the box-shaped housing cover 13.

[0032] The central housing part also has parallel recesses 18 on its outer surface, which are provided on at least two of its sides and run in an arc shape.

[0033] The lower part 25 is provided with plastic locking screws 15 to which electrical supply lines or data bus lines can be connected. Inside the box formed by the lower part 25 and the housing cover 13, connection devices for these lines are provided, along with an associated electronic circuit that also powers the motor and thus makes the compact drive controllable.

[0034] The stator 22's laminated core is composed of individual segments connected circumferentially. This allows for particularly simple and rapid manufacturing. Permanent magnets are provided on the rotor shaft 21, enabling high torques and high positioning accuracy.

[0035] The stator 22 is held in the central housing part 16 by means of an elastically deformable clamping area 17 formed on the central housing part 16.

[0036] In Fig. Figure 2 clearly shows the bearing receptacle 19 for the additional bearing of the intermediate shaft and the bearing receptacle 20 for the additional bearing of the output shaft.

[0037] On the side of the rotor shaft opposite the pinion 12, a bearing cover 24 is screwed onto the central housing part, which also covers and secures the bearing shield 23.

[0038] The lower part 25 has thickened sections 30 for screw connections. A thickened section for an earthing connection 31 is also provided. Additionally, the lower part has thickened sections 32. Threaded holes can be provided in these thickened sections, enabling the creation of stable screw connections.

[0039] In Fig. Figure 4 clearly shows the screws 40 for connecting the housing cover to the lower part or directly or indirectly to the central housing part.

[0040] Instead of form-fit connections, force-fit connections or, alternatively, one-piece designs are also advantageous.

[0041] In further embodiments according to the invention, the lower part 25 and the central housing part 16 are formed in one piece, or alternatively, the housing cover 13 and the lower part 25 are formed in one piece.

[0042] A second embodiment is described in the Fig. 10, Fig. 11, Fig. 12, Fig. 13, Fig. 14, Fig. 15, Fig. 16, Fig. 17 to Fig. Figure 18 shows different views. This embodiment is similar to the first, except that no separate, protruding torque support is bolted on. The torque is supported by means of the flange block connection or by the surrounding system components.

[0043] The housing cover 101 is screwed onto the central housing part 16 using screws 102.

[0044] The output shaft 106 is designed as a hollow shaft, to the inside of which a conical part 105 is frictionally connected at the output-side end region, and a clamping ring 104 is provided on the projecting outer circumference of this conical part. A shaft to be driven can be inserted into the interior of the clamping ring 104 and frictionally clamped to the output shaft 106 by means of the clamping ring 104 and actuation of the screw 107.

[0045] A bearing cover 103 is provided on the side of the output shaft opposite the output side, which forms a housing and is tightly connected to the central housing part 16.

[0046] A third embodiment is described in the Fig. 19, Fig. 20, Fig. 21, Fig. 22, Fig. 23, Fig. 24, Fig. 25, Fig. 26 to Fig. Figure 27 shows various views. This embodiment is similar to the first, with the separate, protruding torque support again being screwed on. Additionally, a holding device 200 in the form of an eyelet is provided on the central housing part, allowing the compact drive to be easily transported. In particular, the holding forces do not cause displacement on the bearings or housing parts during transport, since the holding forces act in the central housing part and the bearings and other parts only have to transfer their own weight force at their connection point.

[0047] A fourth embodiment is described in the Fig. 28, Fig. 29, Fig. 30, Fig. 31, Fig. 32, Fig. 33, Fig. 34, Fig. 35 to Fig.Figure 36 shows various views. This embodiment is similar to the second, except that no separate, protruding torque support is bolted on. The torque is supported by means of the flange block connection or by the surrounding system components. Additionally, a holding device 200 in the form of an eyelet is provided on the central housing part, allowing the compact drive to be easily transported. In particular, the holding forces do not cause displacement on the bearings or housing parts during transport, since the holding forces act in the central housing part and the bearings and other parts only have to transfer their own weight force at their connection point. Reference symbol list 1 Housing cover 2 screws 3 Torque support 4 output bearings for output shaft 5 gear 6 gear 7 pinion shaft 8 bearings for intermediate shaft 9 warehouses 10 Pinion shaft 11 gear 12 sprocket attachments 13 Housing covers 14 depressions 15 plastic locking screws 16 central housing part 17 Tensioning area 18 arc-shaped depressions 19 Bearing housing for intermediate shaft bearings 20 Bearing mount for output shaft bearings 21 Rotor shaft 22 Stator made of individual segments 23 Storage sign 24 bearing caps 25 Lower part 30 Thickening for screw connection 31 Earthing connection 32 Thickening of the lower part of the housing 40 screws 101 Case Cover 102 screws 103 Bearing cover 104 clamping ring 105 conical part 106 Output shaft 107 Screw for clamping 200 holding device

Claims

[1] Compact drive comprising a central housing part (16) arranged between a space for gearbox and a space for electric motor, wherein the output shaft and the rotor shaft (21) of the electric motor are arranged parallel to each other, the transmission is designed with multiple stages, in particular with three stages, wherein a bearing of the rotor shaft (21), a bearing (8, 9) of each intermediate shaft and a bearing of the output shaft are accommodated in the central housing part (16), wherein the stator (22) of the electric motor is frictionally connected to the central housing part (16) by elastically deforming at least a projecting area of ​​the central housing part (16) such that the stator (22) is frictionally held in the central housing part (16), wherein a space is provided for an electronic circuit that at least supplies and / or controls or regulates the electric motor, wherein the space area is enclosed by a lower part (25) and a housing cover (13) placed on this lower part (25) to form a housing, wherein electrical connection devices are provided in the lower part (25), wherein the stator laminated stack (22) is composed of individual segments, wherein a bearing of the output shaft and a bearing (8, 9) of each intermediate shaft are accommodated in a housing cover (1) which is screwed to the central housing part (16), characterized by , that Several parallel recesses (14) are provided on the attached housing cover (13), which extend over at least two or three sides of the housing cover (13), which is designed as a cuboid box. [2] Compact drive according to claim 1, characterized by , that by screwing a screw into the cantilevered area, the elastic deformation of the cantilevered area can be effected. [3] Compact drive according to at least one of the preceding claims, characterized by , that the central housing part (16) and the lower part (25) are made in one piece or the lower part (25) and the housing cover are made in one piece as a box. [4] Compact drive according to at least one of the preceding claims, characterized by , that a separately projecting torque support (3) is provided on the housing part (1), the support point of which lies outside the central housing part (16) and has a distance from the central housing part (16) that is greater than the diameter of the output shaft. [5] Compact drive according to any one of the preceding claims 1 to 3, characterized by , that the torque support is provided at the bearing flange or at the housing cover (1), in particular at a radial distance which is smaller than the largest diameter value of the output shaft. [6] Compact drive according to at least one of the preceding claims, characterized by , that a holding device (200), such as a retaining eyelet, is provided on the central housing part (16). [7] Compact drive according to at least one of the preceding claims, characterized by , that cable glands and indicator means for indicating the operating status of the compact drive are provided in the lower part (25). [8] Compact drive according to at least one of the preceding claims, characterized by , that several parallel, arc-shaped recesses (18) are provided on at least one or two side surfaces of the outer surface of the central housing part (16). [9] Compact drive according to at least one of the preceding claims, characterized by, that gears (6, 11) are provided on the intermediate shafts by means of a keyway connection, in particular wherein the teeth of the gears (6, 11) are helical or spur gears. [10] Compact drive according to at least one of the preceding claims, characterized by , that a pinion gear (12) is provided on the axial end region of the rotor shaft (21). [11] Compact drive according to at least one of the preceding claims, characterized by , that one or all intermediate shafts (7, 10) are designed as pinion shafts, i.e., have teeth.

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