Gear motor

Abstract

The invention relates to a gear motor, comprising: a shaft; -an adapter shaft (1); -a tooth part (42); the adapter shaft is hollow and has a clamping region (5), into which the shaft is inserted, and a connecting region (6), the toothing part (42) has a working toothing and a journal which axially adjoins or is axially spaced apart from the working toothing and which has an outer toothing, in particular a knurled toothing, and the journal is connected to the adapter shaft in a positively locking manner, the adapter shaft has a cutout (8), the angle value of the angle of circumference covered by the cutout (8) in the circumferential direction is between 90 DEG and 270 DEG, and the cutout (8) is configured to penetrate through the adapter shaft in the radial direction.

Description

Technical Field

[0001] The invention relates to a reduction motor. Background Art

[0002] As is known to all, a reduction motor has a transmission mechanism driven by a motor.

[0003] As the closest prior art, JP 2014-1 835 A discloses a reduction motor.

[0004] DE 100 03 923 A1 discloses a method for connecting a hub to a shaft.

[0005] DE 196 20 330 A1 discloses a method for fixing a gear on a shaft.

[0006] DE 101 55 581 A1 discloses a radial clamping hub. Summary of the Invention

[0007] The object of the present invention is therefore to further develop a geared motor in which the geared motor is to be designed to be more compact.

[0008] According to the invention, this object is achieved by a geared motor according to the features of claim 1 .

[0009] The important feature of the reduction motor of the present invention is that the reduction motor has:

[0010] - shafts, in particular rotor shafts,

[0011] - adapter shaft,

[0012] - toothed components, in particular sun gears,

[0013] The adapter shaft is hollow.

[0014] The adapter shaft has a clamping area and a connecting area.

[0015] The shaft is inserted into the clamping region, in particular passed through the clamping region, and connected thereto in a force-fitting manner.

[0016] The toothed component has a working toothing, in particular an involute toothing, and a journal axially adjacent to the working toothing or axially spaced apart from the working toothing, which journal has an external toothing, in particular a knurled toothing.

[0017] The journal is connected to the adapter shaft in a form-fitting manner, in particular by means of an outer toothing which cuts into the adapter shaft.

[0018] wherein the adapter shaft has a cutout / slit,

[0019] The circumferential angle covered by the cutout in the circumferential direction is between 90° and 270°.

[0020] The cutout is configured to penetrate the adapter shaft in a radial direction.

[0021] In particular, the radial direction is based on the rotation axis of the shaft, and the circumferential direction is also based on the rotation axis of the shaft.

[0022] The advantage here is that the cutout separates the clamping area from the connection area, thus facilitating elastic deformation of the clamping area. Furthermore, the normal to the cutout plane of the cutout is parallel to the axial direction. Thus, the shaft extends through the clamping area into the connection area. This allows alignment of the adapter shaft with the shaft in the connection area, while creating a force-locking connection in the clamping area for transmitting torque from the shaft to the adapter shaft, which then transfers this torque to the sun gear via the journal of the sun gear.

[0023] The advantage of the present invention is that the compact structure is achieved by designing the friction-locking connection on the adapter shaft as one piece. Since the clamping area of ​​the adapter shaft and the connection area are designed as one piece, no separate clamping ring is required.

[0024] Furthermore, the geared motor can be designed to be very compact because the sun gear of the planetary gear mechanism is inserted directly into the adapter shaft, and the rotor shaft of the motor is also inserted into the adapter shaft. Consequently, the rotation axes of the sun gear and rotor shaft are coaxially aligned. In particular, the shaft and rotor shaft have only a small axial distance relative to each other, allowing the geared motor to be designed to be very compact.

[0025] In an advantageous embodiment, the cutout is arranged axially between the clamping region and the connecting region. Advantageously, the elasticity of the clamping region is improved, while the adapter shaft can still be designed as an integral part.

[0026] In an advantageous embodiment, the adapter shaft has a stepped bore having a first region located in front of the step of the stepped bore in the axial direction and a second region located behind the step of the stepped bore in the axial direction.

[0027] wherein the journal of the sun gear is received in the second region,

[0028] In particular, the clear inner diameter of the first region is greater than the clear inner diameter of the second region,

[0029] The shaft extends into the first region. Advantageously, the journal is spaced axially from the shaft.

[0030] In an advantageous embodiment, the working toothing of the sun gear is axially spaced apart from the region covered by the journal in the axial direction.

[0031] In particular, the working toothing meshes with the corresponding toothing of the planetary gears, which are rotatably supported in the planetary carrier serving as the output shaft and mesh with the ring gear, which is rotationally fixedly connected to the housing part of the reduction gear. This has the advantage that the sun gear can be connected to the adapter shaft via its journal and transmit torque to the planetary gears via its working toothing.

[0032] In an advantageous design, the inner ring of the bearing is mounted on the adapter shaft, and the outer ring of the bearing is received in the adapter housing of the geared motor.

[0033] In particular, the bearing is a rolling bearing. This has the advantage that the adapter shaft is rotatably supported by the bearing, so that the sun gear is supported by the adapter shaft, which is also supported by the shaft.

[0034] In particular, the axial area covered by the positive-locking connection between the shaft journal and the adapter shaft overlaps the area covered by the bearing in the axial direction, or the area covered by the bearing in the axial direction includes the axial area covered by the positive-locking connection between the shaft journal and the adapter shaft. This has the advantage that the shaft journal can be supported more stably by the adapter shaft.

[0035] In one advantageous embodiment, the area axially covered by the second region includes the area axially covered by the shaft journal or its external toothing. This has the advantage that the shaft journal is received in the adapter shaft in a form-fitting manner. Preferably, the external toothing of the shaft journal cuts into the adapter shaft, thus forming a very strong connection. Furthermore, high torques can be transmitted.

[0036] In an advantageous embodiment, the area axially covered by the bearing overlaps the area axially covered by the second region. This advantageously allows the journal to be accommodated in the second region and the bearing to be inserted into the same axial region. Consequently, high forces can be transmitted in this corresponding axial region of the adapter shaft, for which purpose the adapter shaft also has an increased wall thickness there.

[0037] In an advantageous embodiment, the area covered by the bearing in the axial direction includes the axial position of the step of the stepped bore. This has the advantage that, despite the stress concentration effect of the step, the bearing can reinforce the adapter shaft in the corresponding axial area.

[0038] In an advantageous embodiment, the radial wall thickness of the adapter shaft in the region axially covered by the second region is greater than the radial wall thickness of the adapter shaft in the region adjacent to the second region. This has the advantage that forces can be introduced into the thickened section of the connection region, both from the sun gear and from the bearing.

[0039] In an advantageous embodiment, the radial wall thickness of the adapter shaft in the region axially covered by the second region is greater than the radial wall thickness in the remaining section of the connection region. This has the advantage that forces can be introduced into the thickened section of the connection region, both from the sun gear and from the bearing.

[0040] In an advantageous embodiment, the axial width of the cutout is at most one-fifth of the clear inner diameter of the first region and / or one-fifth of the outer diameter of the shaft in the region axially covered by the clamping region. This has the advantage that the cutout is very narrow, so that the geared motor can be designed to be compact.

[0041] In an advantageous embodiment, three axially oriented holes, in particular blind holes, are provided in the clamping region, in particular the hole axis of each of these three holes being parallel to the axis of rotation of the shaft.

[0042] In particular, the three holes are each designed as a blind hole starting from the axial end face of the clamping region and in particular the three holes are arranged at the same radial distance.

[0043] In particular, the hole located in the middle of the three holes in the circumferential direction has a smaller distance, in particular a smaller angular distance, from the second of the three holes to the third of the three holes,

[0044] Particularly, a hole in these three holes is used for balancing the semi-through cutout directed in the radial direction. Advantage is that, can realize in a simple manner that cutout and axial slit are balanced.

[0045] In an advantageous embodiment, the clamping region has an axial slit which passes through the clamping region in both the axial and radial directions, through which the clamping screw passes. This has the advantage that the clamping region can be heat-shrunk onto the shaft to form a force-locking connection.

[0046] In an advantageous embodiment, the screw head of the clamping screw bears against a step in the clamping region which is arranged on a first side of the axial slot in the clamping region.

[0047] Wherein, on the other side of the axial slit, ie in particular on the second side, the clamping area has a threaded area, through which the clamping screw passes and is screwed in. Advantageously, the function of the clamping ring is integrated into the adapter shaft.

[0048] In an advantageous embodiment, a limiting element, in particular a pin, is fixed in the clamping region and projects from the clamping region.

[0049] The limiting element limits the position of the screw head in the direction of the screw axis, and / or the limiting element is attached to the side of the screw head facing away from the threaded area, in particular for expanding the axial slit.

[0050] In this case, the clamping screw has an annular groove, particularly on a side of the threaded region facing away from the screw head of the clamping screw and / or in a region of the clamping screw that protrudes from the clamping region, particularly facing away from the axial slot, in which the retaining ring is arranged in a positively locking manner, particularly snapped into, in particular for limiting the expansion of the axial slot. This has the advantage that the expansion of the axial slot can be achieved and that an expansion limitation is provided to protect the adapter shaft.

[0051] In an advantageous embodiment, the axial slit opens into the cutout.

[0052] The circumferential angular area covered by the cutout in the circumferential direction includes the circumferential angular area covered by the axial slit in the circumferential direction.

[0053] In particular, the circumferential angular area covered by the axial slit in the circumferential direction is spaced apart on both sides in the circumferential direction from the ends of the circumferential angular area covered by the cutout,

[0054] In particular, the slit plane of the axial slit is perpendicular to the cutout plane of the cutout. This has the advantage that the clamping area of ​​the adapter shaft is designed to be sufficiently elastic. Furthermore, failure of the adapter shaft is avoided because the axial slit does not terminate at the end of the cutout, but rather merges into the cutout at a distance from the end in the circumferential direction, thereby reducing stress concentration effects around the merging area.

[0055] In an advantageous embodiment, the area covered by the shaft in the axial direction overlaps the area covered by the bearing in the axial direction.

[0056] In particular, the shaft is received in the first region, in particular in the region covered by the bearing in the axial direction, with a precise fit and / or without play. This has the advantage that the shaft supports the adapter shaft radially from the inside, thereby reinforcing the bearing receiving region of the adapter shaft, which also surrounds the journal of the sun gear.

[0057] In an advantageous embodiment, the journal is axially spaced apart from the first region. This has the advantage that the sun gear does not protrude into the first region of the blind hole, in particular not into further regions of the blind hole, thereby leaving sufficient space for the shaft to extend as close as possible to the bearing, viewed in the axial direction, thereby stabilizing and strengthening the adapter shaft from the inside.

[0058] Further advantages are apparent from the dependent claims. The invention is not limited to the feature combinations of the claims. Other suitable combinations of the claims and / or features of the individual claims and / or features of the description and / or features of the drawings will be apparent to a person skilled in the art, particularly from the objectives proposed and / or from a comparison with the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0059] The invention will now be explained in more detail with reference to the accompanying schematic drawings:

[0060] Figure 1 The adapter shaft 1 of the geared motor according to the invention is shown in an oblique view.

[0061] Figure 2 A cross section through the adapter shaft 1 is shown.

[0062] Figure 3 A side view of the adapter shaft 1 is shown.

[0063] Figure 4 A cross-sectional view of a planetary gear mechanism is shown.

[0064] Figure 5 A sectional top view of a planetary gear mechanism is shown.

[0065] Figure 6 A further oblique view of the adapter shaft 1 is shown from the first viewing direction, so that the oblique groove 60 formed in the clamping region 5 can be seen.

[0066] Figure 7 A further oblique view of the adapter shaft 1 is shown from a second viewing direction, so that the oblique groove 60 formed in the clamping region 5 can be seen.

[0067] Figure 8 A cutting plane AA is shown which cuts through the half-cut 8 .

[0068] Figure 9 The cross section of the adapter shaft 1 is shown, wherein the cross section is based on Figure 8 The marked section plane divides the half cut 8 of the adapter shaft 1 into two equal halves. DETAILED DESCRIPTION

[0069] As shown, the adapter shaft 1 has a clamping region 5 which is separated from the connection region 6 by a half cutout 8, i.e. a radially arranged, semi-through cutout. The normal to the cutout plane of the half cutout 8 is parallel to the axial direction, in particular to the axis of rotation of the adapter shaft 1.

[0070] The adapter shaft 1 with its annular clamping region 5 and its sleeve-shaped connecting region 6 is designed as a single piece, in particular as a single piece.

[0071] A shaft, in particular a rotor shaft of an electric motor of a geared motor, can be inserted into the clamping region 5 and connected in a force-fitting manner by actuating the clamping screw 2 .

[0072] The journal portion of the sun gear of the planetary gear train of the geared motor, in particular the portion with the knurled teeth, can be inserted into the connection area 6, thereby enabling a positive connection. In this way, the adapter shaft 1 can be used as a coupling between the driving rotor shaft and the sun gear 42.

[0073] The clamping region has an axial slot which passes through the clamping region 5 in the axial direction and in the radial direction, and through which the clamping screw 2 is passed.

[0074] The screw head of the clamping screw 2 rests on a step which is arranged on a first side of the axial slot in the clamping region 5 .

[0075] On the other side of the axial slot, the clamping region has a threaded region, through which the clamping screw 2 is passed and screwed.

[0076] Arranged in the region of the clamping screw 2 protruding from the threaded region is a retaining ring 4 which engages in an annular groove of the clamping screw 2 and thus serves as an expansion limiter.

[0077] Because the axis of the hole in the clamping area is perpendicular to the thread axis of the clamping screw 2, the pin 3 inserted into the hole in the clamping area serves as a stop for the screw head of the clamping screw 2. Therefore, when the clamping screw 2 is unscrewed from the threaded area, the outward movement of the screw head is blocked by the pin 3, so that the axial slit expands until the retaining ring 4 abuts the clamping area and prevents further expansion. This prevents damage to the clamping area.

[0078] The screw head of the clamping screw 2 preferably has an internal hexagonal shape, so that the clamping screw 2 can be easily operated using an external hexagonal tool.

[0079] Three axially oriented holes 20 are also provided in the clamping region for balancing the adapter shaft 1 .

[0080] The three holes 20 are each designed as a blind hole opened from the axial end face of the clamping region, and preferably all three holes are arranged at the same radial distance.

[0081] The distance, in particular the circumferential angular distance, of the hole 20 located centrally in the circumferential direction from the second of the three holes 20 is smaller than the distance from the third of the three holes 20 .

[0082] By selecting the number of the three holes 20 , one of the three holes can be used to achieve a balancing of the radially directed half-through cutout.

[0083] The axial direction is always parallel to the axis of rotation of the shaft and / or sun gear 42. The radial direction, the corresponding radial distance, and the circumferential direction are also each based on the axis of rotation of the shaft and / or sun gear 42.

[0084] The thread axis of the clamping screw 2 is perpendicular to the axis of rotation of the shaft and / or sun gear 42. Furthermore, the hole axis of the hole receiving the pin 3 is also perpendicular to the axis of rotation of the shaft and / or sun gear 42.

[0085] like Figure 4 and Figure 5 As shown, the gearbox of the geared motor has a housing part 44 which is connected to an adapter housing 40 , to which the bearing flange of the motor of the geared motor can be connected, while the bearing flange is simultaneously connected to the stator housing of the motor.

[0086] The bearing of the rotor shaft of the electric machine is accommodated in the bearing flange, the rotor shaft can be inserted into the hollow region of the clamping region and can be connected therein in a force-fitting manner by actuating the clamping screw 2 .

[0087] To this end, the adapter shaft 1 is hollow and has an axially continuous blind hole. To accommodate the rotor shaft, the blind hole has a first axial region located axially in front of the step in the blind hole. The clear inner diameter of the first axial region of the blind hole is larger than the clear inner diameter of the second region located axially behind the step in the blind hole.

[0088] The sun gear 42 is inserted with its journal having external toothing into the second region of the adapter shaft, wherein the external toothing of the journal is cut into the material of the adapter shaft, in particular into the second region.

[0089] The bearing 41 is fitted onto the adapter shaft 1 and received in the adapter housing 40. Specifically, the bearing 41 abuts against a step on the outer surface of the adapter shaft 1.

[0090] The area covered by the bearing 41 in the axial direction includes the area covered by the second area in the axial direction and / or includes the area covered by the journal of the sun gear 42 in the axial direction.

[0091] The area covered by the bearing 41 in the axial direction overlaps with the area covered by the first area in the axial direction.

[0092] The area covered by the first region in the axial direction includes the area covered by the clamping region 5 in the axial direction and overlaps with the area covered by the connecting region 6 in the axial direction.

[0093] The rotor shaft extends axially into the first region to such a depth that the region axially covered by the rotor shaft includes the region axially covered by the semi-through cutout and the region axially covered by the clamping region 5 .

[0094] The working toothing of the sun gear 42, which is axially spaced apart from the journal region, meshes with the toothing of the planetary gears, which in turn mesh with the internal toothing of the ring gear, which is connected in a rotationally fixed manner to the housing part 44. The planetary gears are rotatably supported on a planet carrier, which is itself rotatably supported relative to the housing part 22 and serves as the output shaft 43 of the planetary gear mechanism of the reduction motor.

[0095] In the axial direction, the hole 20 is spaced apart from the second region. Accordingly, the clamping region 5 is also spaced apart from the second region in the axial direction.

[0096] Essential to the present invention is that the step of the stepped bore is arranged in the area axially covered by the bearing. This allows for a greater wall thickness in the area axially covered by the first region than in the remainder of the connection region 6. Consequently, the sun gear 42 and the bearing can be accommodated in a very robust region of the adapter shaft 1. Thus, the region accommodating the bearing and sun gear 42 is designed to be very robust, while the transition to the clamping region, particularly due to the semi-through cutout, is designed to be more flexible.

[0097] The semi-through cutout extends 180° in the circumferential direction and completely penetrates the hollow adapter shaft 1 in the radial direction. The axial width of the semi-through cutout preferably differs from the slit width of the axial slit by at most 50%.

[0098] like Figure 6 As shown, the oblique groove 60, arranged diametrically opposite the axial slot of the clamping region 5, reduces the size of the clamping region 5, thereby increasing its elasticity. Specifically, the oblique groove 60 extends through the edge of the clamping region 5 and is arranged circumferentially between two holes in the bore 20. Advantageously, depending on the design dimensions, i.e., the groove depth, the oblique groove 60 can contribute to balancing the adapter shaft 1, particularly because the oblique groove is not axially continuous.

[0099] like Figure 9 As shown, the half cutout 8 has a first cutout end 91 , which is designed to be straight, at its first end in the circumferential direction, and a second cutout end 90 , which is designed to be straight, in particular non-curved, at its other end.

[0100] Therefore, the first cutout end 91 and the second cutout end 90 are configured to be purely radially directed. Therefore, as the radial distance increases, the second cutout end 90 always maintains the same constant circumferential angle position.

[0101] However, in another embodiment, only the second cut end 90 is Figure 9 The first cutout end 91 is shown as being configured as a straight line, whereas the first cutout end 91 is configured as a curved line.

[0102] The first cutout end 91 has a monotonically increasing, in particular strictly monotonically increasing, circumferential angle with increasing radial distance. Consequently, the circumferential angular range covered by the half cutouts 8 also increases monotonically, in particular strictly monotonically, with increasing radial distance. This allows the adapter shaft 1 to have a higher load-bearing capacity and, in particular, to transmit greater forces.

[0103] Since the adapter shaft 1 is designed to be hollow, the half cutout 8 is delimited by a cutout end 91 located forward in the circumferential direction and a cutout end 90 located rearward, which is arranged at the other end of the half cutout 8 .

[0104] But it is equally important that the bevel groove 60 is not constructed to be axially through, but the area covered by the bevel groove 60 in the axial direction is shorter than the area covered by the clamping area 5 in the axial direction, and the area covered by the clamping area in the axial direction includes the area covered by the bevel groove 60 in the axial direction.

[0105] In other embodiments according to the present invention, the step of the stepped bore is arranged axially centrally in the region covered in the axial direction by the bearing 41. This achieves higher stability.

[0106] List of reference numerals:

[0107] 1 adapter shaft

[0108] 2 clamping screws

[0109] 3 pins

[0110] 4 retaining rings

[0111] 5 Clamping area

[0112] 6 connection areas

[0113] 7Axial slits

[0114] 8 half cuts

[0115] 20 holes

[0116] 40 adapter housing

[0117] 41 bearings

[0118] 42 sun gear

[0119] 43 output shaft, planetary carrier

[0120] 44 shell parts

[0121] 60 chute

[0122] 90 Second incision end

[0123] 91 First incision end.

Claims

1. A reduction motor, comprising: - shafts, in particular rotor shafts, - adapter shaft, - toothed components, in particular sun gears, The adapter shaft is hollow. The adapter shaft has a clamping area and a connection area, The shaft is inserted into the clamping area, in particular passed through the clamping area, and is connected to the clamping area in a force-fitting manner. The toothed component has a working toothing, in particular an involute toothing, and a journal axially adjacent to the working toothing or axially spaced apart from the working toothing, the journal having an external toothing, in particular a knurled toothing, It is characterized by: The journal is connected to the adapter shaft in a form-fitting manner, in particular by cutting an external toothing into the adapter shaft. The adapter shaft has a cutout, The circumferential angle covered by the cutout in the circumferential direction has an angle value between 90° and 270°. The cutout is configured to penetrate the adapter shaft in a radial direction. In particular, the radial direction is based on the rotation axis of the shaft, and the circumferential direction is also based on the rotation axis of the shaft.

2. The reduction motor according to claim 1, characterized in that: The cutout is arranged axially between the clamping region and the connecting region.

3. The reduction motor according to any one of the preceding claims, characterized in that The adapter shaft has a stepped hole having a first region located in front of a step of the stepped hole in the axial direction and a second region located behind the step in the axial direction, The journal of the sun gear is received in the second region, In particular, the clear inner diameter of the first region is greater than the clear inner diameter of the second region, The shaft projects into the first region.

4. The reduction motor according to any one of the preceding claims, characterized in that The working teeth of the sun gear are axially spaced apart from the area covered by the journal in the axial direction. In particular, the working toothing meshes with corresponding toothing of planetary gears which are rotatably supported in a planetary carrier serving as an output shaft and mesh with a ring gear which is connected in a rotationally fixed manner to a housing part of the reducer.

5. The reduction motor according to any one of the preceding claims, characterized in that The inner ring of the bearing is mounted on the adapter shaft, and the outer ring of the bearing is received in the adapter housing of the reduction motor. In particular, the bearing is a rolling bearing, In particular, the axial region covered by the form-locking connection region between the journal and the adapter shaft overlaps with the region covered by the bearing in the axial direction or is contained in the region covered by the bearing in the axial direction.

6. The reduction motor according to any one of the preceding claims, characterized in that The region covered by the second region in the axial direction includes the region covered by the journal or its external toothing in the axial direction.

7. The reduction motor according to any 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, The area covered by the bearing in the axial direction includes the axial position of the step of the stepped bore.

8. The reduction motor according to any one of the preceding claims, characterized in that the radial wall thickness of the adapter shaft in the region covered by the second region in the axial direction is greater than the radial wall thickness of the adapter shaft in the region of the adapter shaft adjacent to the second region, and / or, The radial wall thickness of the adapter shaft in the region covered by the second region in the axial direction is greater than the radial wall thickness in the remaining section of the connecting region.

9. The reduction motor according to any one of the preceding claims, characterized in that The axial width of the cutout is at most one fifth of the clear inner diameter of the first region and / or one fifth of the outer diameter of the shaft in the region covered by the clamping region in the axial direction.

10. The reduction motor according to any one of the preceding claims, characterized in that Three axially oriented bores, in particular blind bores, are provided in the clamping region, in particular the bore axis of each of the three bores being parallel to the axis of rotation of the shaft. In particular, the three holes are respectively designed as blind holes opened from the axial end face of the clamping area. In particular, the three holes are arranged at the same radial distance. In particular, the distance, in particular the circumferential angular distance, of the central hole of the three holes to the second hole of the three holes is smaller than the distance to the third hole of the three holes, In particular, one of the three holes serves to balance the radially directed semi-through cutout.

11. The reduction motor according to any one of the preceding claims, characterized in that The clamping region has an axial slit which passes through the clamping region in the axial direction and in the radial direction, through which the clamping screw passes, and / or, The screw head of the clamping screw bears against a step in the clamping region, which step is arranged on a first side of the axial slot in the clamping region. On the other side of the axial slot, ie in particular on the second side, the clamping region has a threaded region, through which the clamping screw passes and into which it is screwed.

12. The reduction motor according to any one of the preceding claims, characterized in that A limiting element, in particular a pin, is fixed in the clamping region and projects from the clamping region. The limiting element limits the position of the screw head in the direction of the screw axis, and / or the limiting element is placed against the side of the screw head facing away from the threaded area, in particular for expanding the axial slit. The clamping screw has an annular groove, in particular on the side of the threaded area facing away from the screw head of the clamping screw and / or in an area of ​​the clamping screw protruding from the clamping area, in particular protruding from the clamping area away from the axial slit, in which an annular groove a retaining ring is arranged in a form-locking manner, in particular is clamped into the annular groove, in particular for limiting the expansion of the axial slit.

13. The reduction motor according to any one of the preceding claims, characterized in that An axial slit leads into said cutout, The circumferential angular area covered by the axial slit in the circumferential direction is contained in the circumferential angular area covered by the cutout in the circumferential direction, In particular, the circumferential angular area covered by the axial slit in the circumferential direction is spaced apart on both sides in the circumferential direction from both ends of the circumferential angular area covered by the cutout in the circumferential direction, In particular, the slit plane of the axial slit is perpendicular to the slit plane of the slit.

14. The reduction motor according to any one of the preceding claims, characterized in that In the clamping region, in particular diametrically opposite the axial slot, in particular 180° apart from the axial slot in the circumferential direction, an oblique slot is arranged. In particular, the area covered by the clamping region in the axial direction includes the area covered by the oblique groove in the axial direction.

15. The reduction motor according to any one of the preceding claims, characterized in that The half cutout (8) has a first cutout end (91) at its first end in the circumferential direction, which is configured to be straight in the radial direction, and a second cutout end (90) at its other end, which is configured to be curved. In particular, the second cutout end (90) has a circumferential angular position that increases monotonically, in particular strictly monotonically, with increasing radial distance, while the first cutout end (91) has a circumferential angular position that is constant with increasing radial distance, and / or, 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 received in a precisely fitting and / or play-free manner in the first region, in particular in the region covered by the bearing in the axial direction, and / or, The journal is axially spaced from the first region.

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