Geared motor
Patent Information
- Application Number
- EP2024705669
- Authority / Receiving Office
- EP · EP
- Patent Type
- Applications
- Current Assignee / Owner
- Priority Date
- 2023-03-14
- Filing Date
- 2024-02-15
- Publication Date
- 2026-01-21
AI Technical Summary
Existing geared motors lack a compact design due to the need for separate clamping rings and complex torque transmission mechanisms, which increases size and complexity.
A compact geared motor design featuring a hollow adapter shaft with a clamping area and a connecting area separated by a radially directed semi-continuous slot, allowing for elastic deformation and integrated torque transmission without a separate clamping ring, where the sun gear is directly inserted into the adapter shaft, aligning the axis of rotation with the rotor shaft.
The design achieves a compact structure capable of transmitting high torque with improved elasticity and robustness, eliminating the need for a separate clamping ring and simplifying the torque transmission mechanism, resulting in a more efficient and compact motor construction.
Smart Images
Figure EP2024053915_19092024_PF_FP_ABST
Abstract
Description
[0001] Gear motor
[0002] Description:
[0003] The invention relates to a geared motor.
[0004] It is generally known that a geared motor has a gearbox driven by an electric motor.
[0005] From JP 2014- 1 835 A, a geared motor is known as the closest state of the art.
[0006] From DE 100 03 923 A1 a method for connecting a hub to a shaft is known.
[0007] A gear fastening on a shaft is known from DE 196 20 330 A1.
[0008] A radial clamping hub is known from DE 101 55 581 A1.
[0009] The invention is therefore based on the object of developing a geared motor, wherein the geared motor should be designed to be compact.
[0010] According to the invention, the object is achieved in the geared motor according to the features specified in claim 1.
[0011] Important features of the invention in the geared motor are that the geared motor has a shaft, in particular a rotor shaft, an adapter shaft, a toothed part, in particular a sun gear, wherein the adapter shaft is hollow, wherein the adapter shaft has a clamping area and a connecting area, wherein the shaft is inserted into the clamping area, in particular protrudes through the clamping area, and is non-positively connected to the clamping area, wherein the toothed part has a running toothing, in particular an involute toothing, and a pin axially adjacent to the running toothing or axially spaced from the running toothing, which has an external toothing, in particular a knurled toothing, wherein the pin is positively connected to the adapter shaft, in particular by the external toothing being cut into the adapter shaft, wherein the adapter shaft has a slot,wherein the slot extends in the circumferential direction over a circumferential angle whose amount is between 90° and 270°, wherein the slot is formed continuously in the radial direction through the adapter shaft, in particular wherein the radial direction is related to the axis of rotation of the shaft and the circumferential direction is also related to the axis of rotation of the shaft.
[0012] The advantage here is that the slot separates the clamping area from the connecting area, thus facilitating elastic deformation of the clamping area. In addition, the normal direction of the slot plane is aligned parallel to the axial direction. This means that the shaft projects through the clamping area into the connecting area. The connecting area enables centering of the adapter shaft to the shaft, and the clamping area creates a frictional connection for transmitting the shaft torque to the adapter shaft, which then transmits this torque to the sun gear via the pin of the sun gear. The advantage of the invention is a compact design, as the frictional connection on the adapter shaft is formed as a single piece. This is because the clamping area of the adapter shaft is formed as a single piece with the connecting area. This means that no separate clamping ring is required.
[0013] Furthermore, the geared motor can be designed compactly because the sun gear of the planetary gear is directly inserted into the adapter shaft, into which the rotor shaft of the electric motor is also inserted as a shaft. The rotational axes of the sun gear and the rotor shaft are thus coaxially aligned. In particular, the shaft and the rotor shaft are only slightly spaced apart, allowing the geared motor to be constructed compactly.
[0014] In an advantageous embodiment, the slot is arranged axially between the clamping area and the connecting area. This improves the elasticity of the clamping area while still allowing the adapter shaft to be constructed as a single piece.
[0015] In an advantageous embodiment, the adapter shaft has a stepped bore, which has a first region in the axial direction in front of the step of the stepped bore and a second region in the axial direction behind the step, wherein the pin of the sun gear is received in the second region, in particular wherein the clear inner diameter of the first region is larger than the clear inner diameter of the second region, wherein the shaft protrudes into the first region. It is advantageous that the pin is axially spaced from the shaft.
[0016] In an advantageous embodiment, the running gear of the sun gear is axially spaced from the area covered by the journal in the axial direction, in particular, the running gear meshes with the respective gearing of planetary gears, which are rotatably mounted in a planetary carrier acting as the output shaft and mesh with a ring gear that is non-rotatably connected to the housing part of the transmission. It is advantageous that the sun gear can be connected to the adapter shaft with its journal, and its running gear transmits the torque to the planetary gears.
[0017] In an advantageous embodiment, the inner ring of a bearing is mounted on the adapter shaft, the outer ring of which is accommodated in an adapter housing of the geared motor, in particular, the bearing being a rolling bearing. Advantageously, the adapter shaft is rotatably mounted by the bearing, and thus the sun gear is mounted via the adapter shaft, which is also supported by the shaft.
[0018] In particular, the positive connection area between the journal and the adapter shaft covered an axial area that overlaps with or is contained within the area covered by the bearing in the axial direction. The advantage here is that the journal can be supported more robustly via the adapter shaft.
[0019] In an advantageous embodiment, the area covered in the axial direction by the journal or its external toothing is encompassed by the area covered in the axial direction by the second area. Advantageously, the journal is positively received in the adapter shaft. Preferably, the external toothing of the journal is cut into the adapter shaft, thus providing a very rigid connection. Furthermore, a high torque can be transmitted.
[0020] In an advantageous embodiment, the area covered by the bearing in the axial direction overlaps with the area covered by the second area in the axial direction. This is advantageous because the journal is accommodated in the second area, and the bearing is also mounted in the same axial area. Thus, high forces can be introduced into this corresponding axial area of the adapter shaft, for which purpose the adapter shaft also has an increased wall thickness.
[0021] In an advantageous embodiment, the axial position of the step of the stepped bore is encompassed by the area covered by the bearing in the axial direction. The advantage here is that although the step creates a notch effect, the bearing reinforces the adapter shaft in the corresponding axial area. In an advantageous embodiment, the radial wall thickness of the adapter shaft in the area covered by the second area in the axial direction is greater than the radial wall thickness of the adapter shaft in the area of the adapter shaft adjacent to the second area. The advantage here is that forces can be introduced into the thickened section of the connecting area from the sun gear on the one hand and from the bearing on the other.
[0022] In an advantageous embodiment, the radial wall thickness of the adapter shaft in the area covered by the second area in the axial direction is greater than the radial wall thickness in the remaining section of the connecting area. This advantageously allows forces to be introduced into the thickened section of the connecting area from both the sun gear and the bearing.
[0023] In an advantageous embodiment, the axial width of the slot is at least five times smaller than the clear inner diameter of the first region and / or the outer diameter of the shaft in the area covered by the clamping region in the axial direction. This is advantageous because the slot is narrow, allowing the gear motor to be designed compactly.
[0024] In an advantageous embodiment, three axially directed bores, in particular blind holes, are introduced into the clamping area, in particular wherein the bore axis of each of the three bores is aligned parallel to the axis of rotation of the shaft, in particular wherein the three bores are each designed as blind holes introduced from the axial end face of the clamping area and in particular all three are arranged at the same radial distance, in particular wherein the middle one of the three bores in the circumferential direction has a smaller distance, in particular circumferential angular distance, from a second of the three bores than from the third of the three bores, in particular wherein one of the three bores functions as a balance for the radially directed semi-continuous slot. The advantage here is that balancing of the slot and the axial slot is made possible in a simple manner.In an advantageous embodiment, the clamping area has an axial slot extending through the clamping area in both the axial and radial directions, through which a clamping screw protrudes. Advantageously, the clamping area can be shrink-fitted onto the shaft to create a force-locking connection.
[0025] In an advantageous embodiment, the screw head of the clamping screw rests against a step of the clamping area, which is arranged in the clamping area on the first side of the axial slot, wherein on the other side, in particular the second side, of the axial slot, the clamping area has a threaded area through which the clamping screw protrudes and into which the clamping screw is screwed. It is advantageous that the function of a clamping ring is integrated into the adapter shaft.
[0026] In an advantageous embodiment, a limiting element, in particular a bolt, is fastened in the clamping area and protrudes from the clamping area, wherein the limiting element limits the screw head in the screw axis direction and / or the limiting element bears against the side of the screw head facing away from the threaded area, in particular for spreading the axial slot, wherein the clamping screw, in particular on the side of the threaded area facing away from the screw head of the clamping screw and / or in the area of the clamping screw protruding from the clamping area, in particular facing away from the axial slot, has an annular groove in which a retaining ring is arranged in a form-fitting manner, in particular snapped in, in particular for limiting the spreading of the axial slot. The advantage here is that spreading of the axial slot is possible and a spreading limit is provided to protect the adapter shaft.
[0027] In an advantageous embodiment, the axial slot opens into the slot, wherein the circumferential angle range covered by the axial slot in the circumferential direction is contained in the circumferential angle range covered by the slot in the circumferential direction, in particular wherein the circumferential angle range covered by the axial slot in the circumferential direction
[0028] Circumferential angle range in the circumferential direction is spaced on both sides from the ends of the
[0029] The slot covers a circumferential angular range covered by the slot in the circumferential direction, particularly with the slot plane of the axial slot aligned perpendicular to the slot plane of the slot. This is advantageous because the clamping area of the adapter shaft is designed to be sufficiently elastic. Furthermore, failure of the adapter shaft is prevented because the axial slot does not open into the slot at the end of the slot, but rather at a distance in the circumferential direction, thus reducing the stress concentration in the vicinity of the opening area.
[0030] In an advantageous embodiment, the area covered by the shaft in the axial direction overlaps with the area covered by the bearing in the axial direction, in particular, the shaft is accommodated in the first area, particularly in the area covered by the bearing in the axial direction, with a precise fit and / or without play. Advantageously, the shaft supports the adapter shaft from the radial inside and thus stiffens the bearing support area of the adapter shaft, which also surrounds the pin of the sun gear.
[0031] In an advantageous embodiment, the journal is axially spaced from the first area. This is advantageous because the sun gear does not protrude into the first area of the blind hole, especially the further area of the blind hole, thus leaving the shaft sufficient space to protrude as close as possible to the bearing in the axial direction, thereby stabilizing and stiffening the adapter shaft from the inside.
[0032] 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. The invention will now be explained in more detail with reference to schematic illustrations:
[0033] Figure 1 shows an adapter shaft 1 of a gear motor according to the invention in an oblique view.
[0034] Figure 2 shows a cross section of the adapter shaft 1.
[0035] Figure 3 shows a side view of the adapter shaft 1.
[0036] Figure 4 shows a section of the planetary gear.
[0037] Figure 5 shows a top view of the cutaway planetary gear.
[0038] Figure 6 shows a further oblique view of the adapter shaft 1 from a first viewing direction, so that an oblique groove 60 introduced into the clamping area 5 is visible.
[0039] Figure 7 shows a further oblique view of the adapter shaft 1 from a second viewing direction, so that an oblique groove 60 introduced into the clamping area 5 is visible.
[0040] Figure 8 shows a cutting plane AA which cuts through the half-slit 8.
[0041] Figure 9 shows a cross section through the adapter shaft 1, wherein the sectional plane of the cross section marked according to Figure 8 bisects a half slot 8 of the adapter shaft 1.
[0042] As shown in the figures, the adapter shaft 1 has a clamping area 5, which is separated from a connecting area 6 by the half-slot 8, i.e., a radially directed, semi-continuous slot. The normal of the slot plane of the half-slot 8 is aligned parallel to the axial direction, in particular parallel to the rotational axis of the adapter shaft 1. The adapter shaft 1, including its annular clamping area 5 and its bush-shaped connecting area 6, is formed in one piece, in particular as a single part.
[0043] A shaft, in particular the rotor shaft of an electric motor of the gear motor, can be inserted into the clamping area 5 and connected in a force-locking manner by actuating a clamping screw 2.
[0044] The pin section of a sun gear of a planetary gear of the geared motor, which is in particular provided with a knurled toothing, can be inserted into the connecting area 6 and thus connected in a form-fitting manner. In this way, the adapter shaft 1 can be used as a coupling between the input rotor shaft and the sun gear 42.
[0045] The clamping area has an axial slot extending in the axial direction and in the radial direction through the clamping area 5, through which the clamping screw 2 projects.
[0046] The screw head of the clamping screw 2 rests on a step which is arranged in the clamping area 5 on the first side of the axial slot.
[0047] On the other side of the axial slot, the clamping area has a threaded area through which the clamping screw 2 protrudes and into which the clamping screw 2 is screwed.
[0048] In the area of the clamping screw 2 protruding from the threaded area, a retaining ring 4 is arranged, which is snapped into an annular groove of the clamping screw 2 and thus acts as an expansion limiter.
[0049] A bolt 3, which is inserted into a bore in the clamping area, the bore axis of which is aligned perpendicular to the screw axis of the clamping screw 2, serves to limit the screw head of the clamping screw 2. Thus, when the clamping screw 2 is unscrewed from the threaded area, the screw head is prevented from moving out of the bolt 3, thus widening the axial slot until the retaining ring 4 rests against the clamping area and prevents further expansion. This prevents destruction of the clamping area. The screw head of the clamping screw 2 preferably has a hexagon socket, so that the clamping screw 2 can be easily operated with an external hexagon tool.
[0050] In addition, three axially directed bores 20 are provided in the clamping area, which are intended for balancing the adapter shaft 1.
[0051] The three bores 20 are each designed as blind holes introduced from the axial end face of the clamping area and preferably all three are arranged at the same radial distance.
[0052] The middle of the three bores 20 in the circumferential direction has a smaller distance, in particular circumferential angular distance, from a second of the three bores 20 than from the third of the three bores 20.
[0053] By selecting the number of three holes 20, one of the three holes can be provided for balancing the radially directed semi-through slot.
[0054] The axial direction is always parallel to the axis of rotation of the shaft and / or the sun gear 42. The radial direction, the respective radial distance and the circumferential direction are also each related to the axis of rotation of the shaft and / or the sun gear 42.
[0055] The screw axis of the clamping screw 2 is aligned perpendicular to the rotational axis of the shaft and / or the sun gear 42. Furthermore, the bore axis of the bore receiving the bolt 3 is also aligned perpendicular to the rotational axis of the shaft and / or the sun gear 42.
[0056] As shown in Figures 4 and 5, the geared motor's gearbox comprises a housing part 44 connected to an adapter housing 40, to which a bearing flange of the electric motor of the geared motor can be connected. The bearing flange is connected to a stator housing of the electric motor. A bearing for the rotor shaft of the electric motor is accommodated in the bearing flange. The rotor shaft can be inserted into the hollow portion of the clamping area and connected in a force-locking manner by actuating the clamping screw 2.
[0057] For this purpose, the adapter shaft 1 is hollow and has an axially continuous blind bore. To accommodate the rotor shaft, the blind bore has a first axial region located axially in front of a step of the blind bore. The inside diameter of the first axial region of the blind bore is larger than the inside diameter of the second region located axially behind the step of the blind bore.
[0058] The sun gear 42 is inserted with its externally toothed pin into the second area of the adapter shaft, wherein the external toothing of the pin is cut into the material of the adapter shaft, in particular in the second area.
[0059] A bearing 41 is pushed onto the adapter shaft 1 and is accommodated in the adapter housing 40. In particular, the bearing 41 is positioned against a step on the outer surface of the adapter shaft 1.
[0060] The area covered by the bearing 41 in the axial direction comprises the area covered by the second area in the axial direction and / or the area covered by the journal of the sun gear 42 in the axial direction.
[0061] The area covered by bearing 41 in the axial direction overlaps with the area covered by the first area in the axial direction.
[0062] The area covered by the first area in the axial direction comprises the area covered by the clamping area 5 in the axial direction and overlaps with the area covered by the connecting area 6 in the axial direction.
[0063] The rotor shaft extends axially into the first region to such a depth that the region covered by the rotor shaft in the axial direction encompasses the axial region covered by the semi-continuous slot and the region covered by the clamping region 5 in the axial direction. The running teeth of the sun gear 42, which are axially spaced from the journal region, mesh with the teeth of planetary gears, which also mesh with the internal teeth of a ring gear that is rotationally fixedly connected to the housing part 44. The planetary gears are rotatably mounted on a planet carrier, which itself is rotatably mounted relative to the housing part 22 and functions as the output shaft 43 of the planetary gear of the geared motor.
[0064] In the axial direction, the bores 20 are spaced apart from the second region. Accordingly, the clamping region 5 is also spaced apart from the second region in the axial direction.
[0065] An important feature of the invention is that the step of the stepped bore is located in the area covered by the bearing in the axial direction. This allows a greater wall thickness to be achieved in the area covered by the first area in the axial direction than in the remaining connecting area 6. The sun gear 42 and the bearing can thus be accommodated in a very rigid area of the adapter shaft 1. This area of the bearing receptacle and the sun gear 42 receptacle is thus designed to be very rigid, whereas the transition to the clamping area is designed to be more elastic, particularly due to the semi-continuous slot.
[0066] The semi-through slot extends 180° in the circumferential direction and passes completely through the hollow adapter shaft 1 in the radial direction. Preferably, the axial width of the semi-through slot differs from the slot width of the axial slot by a maximum of 50%.
[0067] As shown in Figure 6, the oblique groove 60 arranged diametrically to the axial slot of the clamping area 5 narrows the clamping area 5 and thus increases its elasticity. In particular, the oblique groove 60 intersects an edge of the clamping area 5 and is arranged in the circumferential direction between two of the bores 20. Depending on its dimensions, i.e., groove depth, the oblique groove 60 can advantageously contribute to the balancing of the adapter shaft 1, particularly since it is not axially continuous. As shown in Figure 9, the half-slot 8 has, at its first end in the circumferential direction, a first slot end 91 that is linear, and at its other end, a second slot end 90 that is linear, i.e., not curved.
[0068] The first slot end 91 and the second slot end 90 are thus designed to be purely radially oriented. As the radial distance increases, the second slot end 90 always maintains the same constant circumferential angular position.
[0069] In a further embodiment, however, only the second slot end 90 is designed to be straight, as shown in Figure 9. The first slot end 91, however, is designed to be curved.
[0070] The first slot end 91 has a circumferential angle that increases monotonically, in particular strictly monotonically, with increasing radial distance. Thus, the circumferential angle range covered by the half-slot 8 increases monotonically, in particular strictly monotonically, with increasing radial distance. In this way, the adapter shaft 1 has a higher load capacity, and in particular, higher forces can be transmitted.
[0071] Since the adapter shaft 1 is hollow, the half-slot 8 is limited by the front slot end (90, 91) in the circumferential direction and the rear slot end (90, 91) arranged at the other end of the half-slot 8.
[0072] It is also important, however, that the oblique groove 60 is not axially continuous, but that the area covered by the oblique groove 60 in the axial direction is shorter than the area covered by the clamping area 5 in the axial direction, which area includes the area covered by the oblique groove 60 in the axial direction.
[0073] In further embodiments according to the invention, the step of the stepped bore is arranged axially centrally in the area covered by the bearing 41 in the axial direction. This achieves increased stability.
[0074] 1 adapter shaft
[0075] 2 clamping screws
[0076] 3 bolts
[0077] 4 Retaining ring
[0078] 5 clamping area
[0079] 6 Connection area
[0080] 7 axial slot
[0081] 8 half-slot
[0082] 20 holes
[0083] 40 adapter housings
[0084] 41 warehouses
[0085] 42 Sun gear
[0086] 43 output shaft, planet carrier
[0087] 44 Housing part
[0088] 60 bevel groove
[0089] 90 second slot end
[0090] 91 first slot end
Claims
Patent claims:
1. A geared motor comprising a shaft, in particular a rotor shaft, an adapter shaft, and a toothed part, in particular a sun gear, the adapter shaft being hollow, the adapter shaft having a clamping region and a connecting region, the shaft being inserted into the clamping region, in particular protruding through the clamping region, and being non-positively connected to the clamping region, the toothed part having running teeth, in particular involute teeth, and a pin axially adjacent to the running teeth or axially spaced from the running teeth, which pin has external teeth, in particular knurled teeth, characterized in that the pin is positively connected to the adapter shaft, in particular by the external teeth being cut into the adapter shaft, the adapter shaft having a slot, the slot extending in the circumferential direction over a circumferential angle,the amount of which is between 90° and 270°, wherein the slot is formed continuously in the radial direction through the adapter shaft, in particular wherein the radial direction is related to the axis of rotation of the shaft and the circumferential direction is also related to the axis of rotation of the shaft.
2. Geared motor according to claim 1, characterized in that the slot is arranged axially between the clamping area and the connecting area.
3. Geared motor according to one of the preceding claims, characterized in that the adapter shaft has a stepped bore which has a first region in the axial direction in front of the step of the stepped bore and a second region in the axial direction behind the step, wherein the pin of the sun gear is received in the second region, in particular wherein the clear inner diameter of the first region is larger than the clear inner diameter of the second region, wherein the shaft projects into the first region.
4. Geared motor according to one of the preceding claims, characterized in that the running toothing of the sun gear is axially spaced from the area covered by the journal in the axial direction, in particular wherein the running toothing is in engagement with the respective toothing of planet gears which are rotatably mounted in a planet carrier acting as an output shaft and are in engagement with a ring gear which is connected in a rotationally fixed manner to the housing part of the gear.
5. Geared motor according to one of the preceding claims, characterized in that the inner ring of a bearing is placed on the adapter shaft, the outer ring of which bearing is accommodated in an adapter housing of the geared motor, in particular wherein the bearing is a rolling bearing, in particular wherein the positive connection area between the pin and the adapter shaft covers an axial area which overlaps with the area covered by the bearing in the axial direction or is contained in it.
6. Geared motor according to one of the preceding claims, characterized in that the area covered in the axial direction by the pin or its external toothing is encompassed by the area covered in the axial direction by the second area.
7. Geared motor according to one of the preceding claims, characterized in that the area covered by the bearing in the axial direction overlaps with the area covered by the second area in the axial direction and / or that the axial position of the step of the stepped bore is encompassed by the area covered by the bearing in the axial direction.
8. Geared motor according to one of the preceding claims, characterized in that the radial wall thickness of the adapter shaft in the area covered by the second area in the axial direction is greater than the radial wall thickness of the adapter shaft in the area of the adapter shaft adjacent to the second area, and / or that the radial wall thickness of the adapter shaft in the area covered by the second area in the axial direction is greater than the radial wall thickness in the remaining section of the connecting area.
9. Geared motor according to one of the preceding claims, characterized in that the axial width of the slot is at least five times smaller than the clear inner diameter of the first region and / or the outer diameter of the shaft in the region covered by the clamping region in the axial direction.
10. Geared motor according to one of the preceding claims, characterized in that three axially directed bores, in particular blind bores, are introduced into the clamping area, in particular wherein the bore axis of each of the three bores is aligned parallel to the axis of rotation of the shaft, in particular wherein the three bores are each designed as blind bores introduced from the axial end face of the clamping area and in particular all three are arranged at the same radial distance, in particular wherein the middle one of the three bores in the circumferential direction has a smaller distance, in particular circumferential angular distance, from a second of the three bores than from the third of the three bores, in particular wherein one of the three bores functions as a balance for the radially directed semi-continuous slot.
11. Geared motor according to one of the preceding claims, characterized in that the clamping area has an axial slot which passes through the clamping area in the axial direction and in the radial direction and through which a clamping screw projects, and / or that the screw head of the clamping screw rests on a step of the clamping area which is arranged in the clamping area on the first side of the axial slot, wherein on the other side, in particular the second side, of the axial slot the clamping area has a threaded area through which the clamping screw projects and into which the clamping screw is screwed.
12. Geared motor according to one of the preceding claims, characterized in that a limiting element, in particular a bolt, is fastened in the clamping area and projects out of the clamping area, wherein the limiting element limits the screw head in the screw axis direction and / or the limiting element bears against the side of the screw head facing away from the threaded area, in particular for spreading the axial slot, wherein the clamping screw, in particular on the side of the threaded area facing away from the screw head of the clamping screw and / or in the area of the clamping screw protruding from the clamping area, in particular facing away from the axial slot, has an annular groove in which a locking ring is arranged in a form-fitting manner, in particular snapped in, in particular for limiting the spreading of the axial slot.
13. Geared motor according to one of the preceding claims, characterized in that the axial slot opens into the slot, wherein the circumferential angular range covered by the axial slot in the circumferential direction is contained in the circumferential angular range covered by the slot in the circumferential direction, in particular wherein the circumferential angular range covered by the axial slot in the circumferential direction is spaced apart on both sides in the circumferential direction from the ends of the circumferential angular range covered by the slot in the circumferential direction, in particular wherein the slot plane of the axial slot is aligned perpendicular to the slot plane of the slot.
14. Geared motor according to one of the preceding claims, characterized in that an oblique groove is arranged in the clamping area, in particular diametrically opposite the axial slot, in particular thus spaced 180° from the axial slot in the circumferential direction, in particular wherein the area covered by the oblique groove in the axial direction is contained in the area covered by the clamping area in the axial direction.
15. Geared motor according to one of the preceding claims, characterized in that the half-slot (8) has at its first end in the circumferential direction a first slot end (91) which is straight in the radial direction, and at its other end a second slot end (90) which is curved, in particular such that the second slot end (90) has a circumferential angular position which increases monotonically, in particular strictly monotonically, with increasing radial distance and the first slot end (91) has a circumferential angular position which is constant with increasing radial distance, and / or that the region covered by the shaft in the axial direction overlaps with the region covered by the bearing in the axial direction, in particular wherein the shaft is received in the first region, in particular in the region covered by the bearing in the axial direction, with an exact fit and / or without play, and / or that the pin is axially spaced from the first region.