Adapter shaft

Abstract

An adapter shaft (1) for frictional connection to a shaft; wherein the adapter shaft has a clamping region and a connecting region; wherein the shaft is inserted into the clamping region and is frictionally connected to the clamping region; wherein the clamping region has an axial slot (7); wherein the adapter shaft has a transverse slot (8), in particular wherein the transverse slot (8) is located axially between the connecting region and the clamping region, in particular in the region covered by the transverse slot - wherein the first slot end of the transverse slot in the circumferential direction opens into a first radial bore (4), in particular a through-bore, in the adapter shaft - and / or wherein the second slot end of the transverse slot in the circumferential direction opens into a second radial bore (4), in particular a through-bore, in the adapter shaft.

Description

[0001] Adapter shaft

[0002] Description:

[0003] The invention relates to an adapter shaft.

[0004] It is generally known that a geared motor has a gearbox driven by an electric motor.

[0005] A shaft with pinion is known from JP 2014-1 835 A.

[0006] A flexible shaft coupling is known from DE 10 2004 063 562 A1.

[0007] From DE 100 03 923 A1 a method for connecting a hub to a shaft is known.

[0008] A radial clamping hub is known from DE 101 55 581 A1.

[0009] From DE 10 2024 104 310 A1, a geared motor is known as the closest prior art.

[0010] A shaft coupling is known from JP 2007 - 113 779 A.

[0011] The invention is therefore based on the objective of further developing a connection between the electric motor of the geared motor and the gearbox of the geared motor, whereby the geared motor should be able to be implemented in a compact form.

[0012] According to the invention, the problem is solved in the adapter shaft according to the features specified in claim 1 and in the geared motor according to the features specified in claim 12.

[0013] Important features of the invention for the adapter shaft are that the adapter shaft is designed for force-fit connection with a shaft, in particular wherein the adapter shaft is hollow,

[0014] ISI \ EIDOPAT 22.09.2025 wherein the adapter shaft has a clamping area and a connection area, wherein the shaft is inserted into the clamping area, in particular projects through the clamping area, and is positively connected to the clamping area, wherein the clamping area has an axial slot, in particular wherein the normal of the slot plane of the axial slot is oriented perpendicular to the axis of rotation of the adapter shaft and / or is oriented in a tangential direction with respect to the axis of rotation of the adapter shaft, wherein the adapter shaft has a transverse slot, in particular wherein the transverse slot is arranged axially between the connection area and the clamping area, in particular in the circumferential angular area covered by the transverse slot and in the radial distance area covered by the transverse slot with respect to the axis of rotation of the adapter shaft, in particular wherein the normal of the slot plane of the transverse slot is oriented parallel to the axial direction,in particular, is aligned parallel to the axis of rotation of the adapter shaft, and in particular, the transverse slot extends circumferentially over a circumferential angle range which extends in magnitude over at least 90° and at most 270°.

[0015] - wherein the first circumferential end of the transverse slot opens into a first radial bore of the adapter shaft, in particular through material of the adapter shaft, and / or wherein the second circumferential end of the transverse slot opens into a second radial bore of the adapter shaft, in particular through.

[0016] An advantage of this design is that the mechanical force distribution within the adapter shaft can be optimized, thus facilitating elastic deflection of the clamping area and increasing the clamping force. Despite this, damage to the adapter shaft is prevented because the force redirection around the circular radial bore allows for a higher load capacity, resulting in high shaft strength. Furthermore, the radial bore provides a runout for the milling tool, preventing a narrow, sharp-edged runout gap that would reduce shaft strength.

[0017] In an advantageous embodiment, the area covered circumferentially by the first radial bore borders, in particular, the area covered circumferentially by the transverse slot. It is advantageous that the transverse slot does not open into a narrow, but rather into a round, widened outlet area.

[0018] In an advantageous embodiment, the area covered circumferentially by the second radial bore borders, in particular, the area covered circumferentially by the transverse slot. It is advantageous that the force is redirected around the circular radial bore, thus increasing the shaft strength.

[0019] In an advantageous embodiment, the clear diameter of the first radial bore is larger than the slot width of the transverse slot, particularly where the slot width is determined in the axial direction. An advantage of this is that the force distribution is spread out, thus improving shaft strength.

[0020] In an advantageous embodiment, the clear diameter of the second radial bore is larger than the slot width of the transverse slot, particularly where the slot width is determined in the axial direction. An advantage of this is that the force distribution is spread out, thus improving shaft strength.

[0021] In an advantageous embodiment, the opening angle of the transverse slot, in particular the circumferentially determined clear angular range of the transverse slot, is greater than 180°, particularly to generate a high clamping force, or less than 180°, particularly to achieve high shaft strength, or exactly 180°, such that the first radial bore and the second radial bore are coaxially aligned with each other and can be manufactured or executed together as a single, interrupted radial bore. It is advantageous that the opening angle for achieving the respective advantage mentioned is predictable.

[0022] In an advantageous embodiment, the respective end of the transverse slot, particularly in the circumferential direction, is designed to be straight, especially extending in a purely radial direction. An advantage of this is that the milling tool can move freely in the axial direction.

[0023] In an advantageous embodiment, each end of the transverse slot, particularly in the circumferential direction, has only a single circumferential angular position. The advantage here is that the milling tool can move freely in the axial direction.

[0024] In an advantageous embodiment, the transverse slot is arranged axially between the clamping area and the connection area. The advantage here is that, with sufficiently high shaft rigidity, a high clamping force can be achieved, for which the clamping area must withstand high elastic deformation.

[0025] In a preferred embodiment, the axial slot opens into the transverse slot. This is advantageous because it facilitates elastic deformation of the clamping area, thus enabling the generation of a high clamping force for the positive connection of a shaft, particularly a rotor shaft, to the adapter shaft.

[0026] In an advantageous embodiment, the adapter shaft is hollow, comprising a clamping area and a connection area, wherein the shaft is inserted into the clamping area, in particular projecting through the clamping area, and is positively connected to the clamping area, wherein the clamping area has an axial slot, in particular wherein the normal of the slot plane of the axial slot is aligned in a tangential direction with respect to the axis of rotation of the adapter shaft, wherein the adapter shaft has a transverse slot, wherein the normal of the slot plane of the transverse slot is aligned parallel to the axial direction, in particular thus parallel to the axis of rotation of the adapter shaft, wherein the first circumferential slot end of the transverse slot is curved, in particular such that with increasing radial distance the circumferential angular position of the first slot end increases monotonically, in particular strictly monotonically.in particular such that the circumferential angle range covered by the transverse slot with increasing radial distance is monotonically, in particular strictly monotonically, increasing, in particular wherein the transverse slot extends in the circumferential direction over a circumferential angle the magnitude of which is between 90° and 270°, in particular wherein the transverse slot is continuous through the adapter shaft in the radial direction, in particular at the circumferential angle positions covered by the transverse slot in the circumferential direction, in particular wherein the radial direction is referred to the axis of rotation of the shaft and the circumferential direction is also referred to the axis of rotation of the shaft.

[0027] An advantage of this design is that the adapter shaft, due to the curved design of the first slot end, has a higher load-bearing capacity and is therefore able to transmit higher torques. It is important that the first slot end is spaced circumferentially from the axial slot, whereas the second slot end of the transverse slot is adjacent to the axial slot or at least closer to it than the first slot end of the transverse slot.

[0028] The clamping area therefore transitions into the connection area or borders on the connection area in the area of ​​the adapter shaft adjacent to and / or bordering the first end of the slot.

[0029] Preferably, the first slot end is curved in a circular arc. Alternatively, to achieve an even higher load-bearing capacity of the adapter shaft, the first slot end is curved in an elliptical or tangential shape. In an advantageous embodiment, the other slot end of the transverse slot, particularly in the circumferential direction, is straight, especially in the radial direction, and / or has a single circumferential angle position. The advantage here is that the load-bearing capacity remains high and the production of the straight slot end is very simple.

[0030] In an advantageous embodiment, the transverse slot is arranged axially between the clamping area and the connection area. The advantage here is that the elasticity of the clamping area is improved, while the adapter shaft can still be manufactured as a single piece.

[0031] Key features of the geared motor with the aforementioned adapter shaft are that the geared motor comprises the shaft, in particular the rotor shaft, the adapter shaft, and a toothed part, in particular the sun gear, wherein the adapter shaft is hollow, wherein the adapter shaft has a clamping area and a connection area, wherein the shaft is inserted into the clamping area, in particular protruding through the clamping area, and is positively connected to the clamping area, wherein the toothed part has a running tooth, in particular involute toothing, and a journal axially adjacent to or axially spaced from the running toothing, which has external teeth, in particular knurled teeth, wherein the journal is positively connected to the adapter shaft, in particular by the external teeth being cut into the adapter shaft, and wherein the adapter shaft has a transverse slot.wherein the transverse slot extends circumferentially over a circumferential angle the magnitude of which is between 90° and 270°, wherein the transverse slot is formed continuously through the adapter shaft in the radial direction, in particular wherein the radial direction is referenced to the axis of rotation of the shaft and the circumferential direction is also referenced to the axis of rotation of the shaft.

[0032] An advantage of this design is that the transverse slot separates the clamping area from the connection area, thus facilitating elastic deformation of the clamping area. Furthermore, the normal direction of the slot plane of the transverse slot is aligned parallel to the axial direction. This allows the shaft to project through the clamping area and into the connection area. Within the connection area, the adapter shaft is centered relative to the shaft, while the clamping area provides a force-fit connection for transmitting the shaft's torque to the adapter shaft, which then transmits this torque to the sun gear via the sun gear's journal.

[0033] The advantage of the invention is its compact design, as the friction-fit connection on the adapter shaft is formed as a single unit. This is because the clamping area of ​​the adapter shaft is integrated with the connection area. Therefore, no separate clamping ring is required.

[0034] Furthermore, the geared motor can be designed compactly because the sun gear of the planetary gearbox is directly inserted into the adapter shaft, into which the rotor shaft of the electric motor is also inserted. The axes of rotation of the sun gear and the rotor shaft are thus coaxially aligned. In particular, the shaft and the rotor shaft have only a minimal axial distance from each other, allowing the geared motor to be built compactly.

[0035] In an advantageous embodiment, the adapter shaft has a stepped bore, which comprises 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 journal 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, and wherein the shaft projects into the first region. It is advantageous that the journal is axially spaced from the shaft.

[0036] In an advantageous embodiment, the toothing of the sun gear is axially spaced from the area covered by the journal in the axial direction, particularly in that the toothing engages with the respective teeth of planet gears, which are rotatably mounted in a planet carrier acting as an output shaft and are engaged with a ring gear non-rotatably connected to the housing part of the transmission. It is advantageous that the sun gear can be connected to the adapter shaft via its journal and transmits the torque to the planet gears via its toothing.

[0037] In an advantageous embodiment, the inner ring of a bearing is mounted on the adapter shaft, the outer ring of which is received in an adapter housing of the geared motor, particularly wherein the bearing is a rolling bearing. It is advantageous that the adapter shaft is rotatably mounted by means of the bearing and thus the sun gear is mounted via the adapter shaft, which is also supported by the shaft.

[0038] In an advantageous embodiment, the area covered axially by the pin or its external teeth is encompassed by the area covered axially by the second area. It is advantageous that the pin is positively engaged in the adapter shaft. Preferably, the external teeth of the pin are cut into the adapter shaft, resulting in a very rigid connection. Furthermore, a high torque can be transmitted.

[0039] 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. It is advantageous that the journal is received in the second area and that the bearing is also mounted in the same axial area. Thus, high forces can be introduced in this corresponding axial area of ​​the adapter shaft, for which purpose the adapter shaft also has an increased wall thickness in this area. 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. It is advantageous that, although the step creates a notch effect, the bearing, which is mounted on the adapter shaft, particularly with a force-fit connection, improves the force distribution of the adapter shaft in the corresponding axial area.

[0040] In an advantageous embodiment, the radial wall thickness of the adapter shaft in the area covered axially by the second area is greater than the radial wall thickness of the adapter shaft in the area adjacent to the second area. This is advantageous because forces can be introduced into the thickened section of the connection area from both the sun gear and the bearing.

[0041] In an advantageous embodiment, the radial wall thickness of the adapter shaft in the area covered axially by the second section is greater than the radial wall thickness in the remaining section of the connection area. This is advantageous because forces can be introduced into the thickened section of the connection area from both the sun gear and the bearing.

[0042] In an advantageous embodiment, the axial width of the transverse 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. It is advantageous that the transverse slot is narrow, thus allowing the geared motor to be designed compactly.

[0043] In an advantageous embodiment, three axially oriented bores, in particular blind bores, are provided in 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 provided from the axial end face of the clamping area, in particular wherein all three are arranged at the same radial distance, in particular wherein the circumferentially central of the three bores has a smaller distance, in particular circumferential angular distance, to a second of the three bores than to the third of the three bores, in particular wherein one of the three bores acts as a balancing element for the transverse slot. It is advantageous that balancing of the transverse slot, the clamping screw, the associated bores, and the axial slot is easily accomplished.

[0044] In an advantageous embodiment, the clamping area has an axial slot extending through it in both the axial and radial directions, through which a clamping screw projects. It is advantageous that the clamping area can be shrink-fitted onto the shaft to create the force-fit connection.

[0045] In an advantageous embodiment, the screw head of the clamping screw rests against a step in the clamping area, which is arranged on the first side of the axial slot. On the other side, and in particular the second side, of the axial slot, the clamping area has a threaded section through which the clamping screw projects and into which it is screwed. It is advantageous that the function of a clamping ring is integrated into the adapter shaft.

[0046] In an advantageous embodiment, a limiting element, in particular a bolt, is attached 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 rests against the side of the screw head facing away from the threaded area, in particular for spreading the axial slot. 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 the area of ​​the clamping screw projecting out of the clamping area, in particular facing away from the axial slot. A retaining ring is positively engaged in this groove, in particular snapped into place, in particular for limiting the spreading of the axial slot. It is advantageous that spreading of the axial slot is enabled and that a spreading limit is provided to protect the adapter shaft.

[0047] In an advantageous embodiment, the axial slot opens into the transverse slot, wherein the circumferential angle range covered by the axial slot is contained within the circumferential angle range covered by the transverse slot, particularly wherein the circumferential angle range covered by the axial slot is spaced circumferentially on both sides from the ends of the circumferential angle range covered by the transverse slot, and particularly wherein the slot plane of the axial slot is oriented perpendicular to the slot plane of the transverse slot. It is advantageous that the clamping area of ​​the adapter shaft is sufficiently elastic. Furthermore, failure of the adapter shaft is prevented because the axial slot does not open at the end of the transverse slot, but rather at a circumferential distance, thus reducing the notch effect in the vicinity of the opening area.

[0048] 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, particularly in that the shaft is received in the first area, especially in the area covered by the bearing in the axial direction, with a precise fit and / or without play. It is advantageous that the shaft supports the adapter shaft from the radial inside and thus also the bearing receiving area of ​​the adapter shaft, which also surrounds the journal of the sun gear.

[0049] In an advantageous embodiment, the journal is axially spaced from the first section. The advantage here is that the sun gear does not project into the first section of the blind hole, and in particular not into the wider section of the blind hole, thus leaving the shaft sufficient space to project as close as possible to the bearing in the axial direction and thereby support the adapter shaft from within.

[0050] 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 claim features and / or features of the description and / or the figures will become apparent, particularly from the problem statement and / or the problem arising from a comparison with the prior art. The invention will now be explained in more detail with reference to schematic illustrations.

[0051] Figure 1 shows a first adapter shaft 1 of a geared motor in oblique view.

[0052] Figure 2 shows a front view of the adapter shaft 1.

[0053] Figure 3 shows a side view of the adapter shaft 1.

[0054] Figure 4 shows the adapter shaft 1 of a geared motor according to the invention in a side view, wherein a radial bore 4 is provided at the end of a transverse slot 8.

[0055] Figure 5 schematically shows the disc cutter 50 extending to produce the transverse slot 8 in the radial bore 4.

[0056] Figure 6 shows the adapter in an oblique view.

[0057] Figure 7 shows a cross-section of the adapter shaft 1 in the area of ​​the transverse slot 8, wherein the transverse slot 8 has an opening angle of 140°, in particular wherein the cutting plane of the cross-section bisects the transverse slot 8 of the adapter shaft 1 and its normal direction is aligned parallel to the axial direction, i.e. direction of rotation of the adapter shaft 1.

[0058] Figure 8 shows a second adapter shaft 1, in which, unlike in Figure 7, the transverse slot 8 has an opening angle of 180°.

[0059] Figure 9 shows a third adapter shaft 1, in which, unlike in Figure 7, the transverse slot 8 has an opening angle of 240°.

[0060] Figure 10 shows a longitudinal section through the adapter including the adapter shaft 1.

[0061] As shown in the figures, the adapter shaft 1 has a clamping area 5 which is separated from a connecting area 6 by means of the transverse slot 8, in particular a radially directed semi-through slot, especially a radial slot. The normal of the slot plane of the transverse slot 8 is aligned parallel to the axial direction, in particular parallel to the axis of rotation of the adapter shaft 1.

[0062] The adapter shaft 1, including its ring-shaped clamping area 5 and its bushing-shaped connecting area 6, is formed in one piece, in particular in one piece.

[0063] A shaft, in particular a rotor shaft of an electric motor or geared motor, can be inserted into the clamping area 5 and connected by means of a force-fit connection by actuating a clamping screw which is screwed with its threaded area into the threaded area of ​​a tangential bore 3.

[0064] The connecting area 6 is designed to accommodate the pin section of a sun gear of a planetary gear unit of the geared motor, which is toothed with knurled teeth, thus enabling a positive connection. In this way, the adapter shaft 1 can be used as a coupling between the driving rotor shaft and a sun gear 42.

[0065] The clamping area 5 has an axial slot 7 extending through the clamping area 5 in both the axial and radial directions, through which the clamping screw 3 protrudes.

[0066] The screw head of the clamping screw rests against a step which is located in the clamping area 5 on the first side of the axial slot 7.

[0067] On the other side of the axial slot 7, the clamping area 5 has a threaded area through which the clamping screw protrudes and into which the clamping screw is screwed.

[0068] In the area of ​​the clamping screw that protrudes from the threaded area, a retaining ring is arranged, which snaps into an annular groove of the clamping screw and thus acts as an expansion limiter.

[0069] A bolt inserted into a bore of the clamping area 5, the axis of which is perpendicular to the axis of the clamping screw, serves as a limit to the screw head of the clamping screw 2. Thus, when the clamping screw is unscrewed from the threaded area, the screw head is prevented from moving out of the bolt 3, and the axial slot 7 is widened until the retaining ring rests against the clamping area 5 and prevents further expansion. This prevents damage to the clamping area.

[0070] The screw head of the clamping screw preferably has an internal hexagon socket, so that the clamping screw can be easily operated with an external hexagon tool.

[0071] In the clamping area 5, three axially directed bores 2 are also provided, which are intended for balancing the adapter shaft 1.

[0072] The three bores 2 are each designed as blind holes drilled from the axial end face of the clamping area and are preferably all arranged at the same radial distance. Preferably, the blind holes are of different depths compared to each other, in particular with different bore depths. Alternatively, at least one of the three bores 2 has a different bore depth than the other two.

[0073] Either the three bores 2 are evenly spaced apart in the circumferential direction, or alternatively, the bore 2 that is the middle one in the circumferential direction has a smaller distance, in particular circumferential angular distance, to a second bore 2 than to the third bore 2.

[0074] By choosing the number of three bores 2, the three bores for balancing the radially directed semi-through transverse slot and the clamping screw with the associated bores can be provided.

[0075] The axial direction is always parallel to the axis of rotation of the shaft and / or the sun gear. The radial direction, the respective radial distance, and the circumferential direction are also each relative to the axis of rotation of the shaft and / or the sun gear.

[0076] The screw axis of the clamping screw is aligned perpendicular to the axis of rotation of the shaft and / or the sun gear. Furthermore, the bore axis of the bore receiving the bolt is also aligned perpendicular to the axis of rotation of the shaft and / or the sun gear. Preferably, the gearbox of the geared motor has a housing part that is connected to the adapter housing 40, to which a bearing flange of the electric motor of the geared motor can be connected, the bearing flange being connected to a stator housing of the electric motor.

[0077] The bearing flange accommodates a bearing of the rotor shaft of the electric motor, whereby the rotor shaft can be inserted into the hollow area of ​​the clamping area 5 and can be connected by means of actuating the clamping screw.

[0078] For this purpose, the adapter shaft 1 is hollow and has an axially through blind hole. To accommodate the rotor shaft, the blind hole has a first axial section arranged axially in front of a step in the blind hole. The clear diameter of the first axial section of the blind hole is larger than the clear diameter of the second section arranged axially behind the step in the blind hole.

[0079] The sun gear, not shown in the figures, is inserted into the second area of ​​the adapter shaft with its externally toothed pin, the external toothing of the pin being cut into the material of the adapter shaft, particularly in the second area.

[0080] A bearing 101 is mounted on the adapter shaft 1 and is received in the adapter housing 40. In particular, the bearing 101 is positioned against a step on the outer surface of the adapter shaft 1.

[0081] The area covered by bearing 101 in the axial direction includes the area covered by the second area in the axial direction and / or the area covered by the pivot of the sun gear 42 in the axial direction.

[0082] The area covered by bearing 101 in the axial direction overlaps with the area covered by the first area in the axial direction.

[0083] The area covered axially by the first region includes the area covered axially by clamping region 5 and overlaps with the area covered axially by connection region 6. The rotor shaft projects axially into the first region to such a depth that the area covered axially by the rotor shaft includes the axial area covered by the transverse slot and the area covered axially by clamping region 5.

[0084] The axially spaced toothing of the sun gear 42 engages with the teeth of planet gears, which in turn engage with the internal teeth of a ring gear that is rotationally fixed to the housing part. The planet gears are rotatably mounted on a planet carrier, which itself is rotatably mounted relative to the housing part and serves as the output shaft of the planetary gear set of the geared motor.

[0085] The bores 2 are spaced axially from the second area. Similarly, the clamping area 5 is also spaced axially from the second area.

[0086] An important aspect of the invention is that the step of the stepped bore is arranged in the area axially covered by the bearing. In this way, a greater wall thickness can be achieved in the area axially covered by the first section than in the remaining connection area 6. The mounting of the sun gear and the bearing can thus be implemented in a very rigid area of ​​the adapter shaft 1. This area of ​​the bearing and sun gear mounting is therefore very rigid, whereas the transition to the clamping area is more elastic, particularly due to the transverse slot.

[0087] In the embodiment according to Figure 7, the transverse slot 8 has an opening angle of 140° in the circumferential direction, and in Figure 9, an opening angle of 240°. In the embodiment according to Figure 8, an opening angle of 180° is achieved, so that the transverse slot 8 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 transverse slot 8 differs from the slot width of the axial slot by no more than 50%.

[0088] In the design according to Figure 9, a high clamping force can be generated because a particularly high elasticity can be achieved, although the shaft strength and thus the maximum transmittable torque is reduced.

[0089] In the embodiment shown in Figure 7, a lower clamping force can be generated compared to Figure 9, but a high torque can be transmitted because the shaft strength is correspondingly high. In the embodiment shown in Figure 8, a medium clamping force can be generated compared to the embodiments shown in Figures 7 and 9, with a medium torque transmission also compared to the embodiments shown in Figures 7 and 9.

[0090] In particular, in the embodiments according to Figures 7, 8 and 9, one of the radial bores 4 is arranged at each of the circumferentially forward and correspondingly rear end of the transverse slot 8, which are continuous, i.e., not designed as blind holes, but open both into the inner cavity and into the outer environment of the adapter shaft 1.

[0091] The radial bores 4 optimize the force flow during torque transmission, thus preventing material fatigue. Furthermore, the radial bores 4 allow for the unimpeded run-out of a disc cutter 50, which is used to machine the transverse slot 8, as shown in Figure 5.

[0092] As shown in Figure 4, a clamping screw with a right-hand thread is screwed into the tangential bore 3 in the direction of view of this Figure 4.

[0093] In contrast to the embodiment according to Figure 1, where the axial slot 7 opens into the transverse slot 8 in a circumferentially viewed end region of the transverse slot 8, in the embodiment according to Figure 4 the axial slot 7 opens into the transverse slot 8 in the circumferentially viewed center of the transverse slot 8. Therefore, the axial slot 7 is not visible in Figure 4.

[0094] If the clamping screw were to roll off the transverse slot 8 shown in Figure 4, the clamping screw would move radially outwards outwards along the transverse slot 8 when its right-hand thread is turned, in particular it would move radially outwards.

[0095] The clamping screw is located on the side of the transverse slot 8 facing away from the connection area 6.

[0096] Alternatively, the clamping screw could also be implemented as a left-hand thread. In this case, the transverse slot 8 would be arranged as a mirror image of the plane containing the axis of rotation of the adapter shaft, which is parallel to the axis of the tangential bore 3. If the left-hand thread clamping screw were to roll along the transverse slot 8, it would migrate radially outwards, specifically radially outwards. The clamping screw is located on the side of the transverse slot 8 facing away from the connection area 6.

[0097] The described rolling movements are purely fictitious, since the clamping screw is in any case positively locked in the tangential bore 3 and the transverse slot 8 contains no material. Here, this fictitious rolling movement at the transverse slot 8 is used to relate the thread direction to the positioning of the axial slot 7.

[0098] The thread direction can be determined using the right-thumb rule.

[0099] In any case, the cross product, i.e., the vector product, of the thread direction and the direction of the shortest connection from the bore axis of the tangential bore 3 to the axial slot 7, particularly in the area of ​​the transverse slot 8, is directed radially inwards. Specifically, to form the cross product according to the right-hand rule, the thumb points in the direction of the thread, the index finger in the direction of the shortest connection, and the middle finger radially inwards.

[0100] As shown in Figure 10, the adapter housing 40 is covered on one side by a sealing cover 100, in which the outer ring of a bearing 101 is received. The inner ring of the bearing 101 is mounted on the adapter shaft 1. A labyrinth seal 102 is arranged between the adapter shaft 1, in particular between the connection area 5, and the sealing cover 100, which allows the use of grease as a lubricant and / or sealant.

[0101] If oil is to be used as a lubricant and / or sealant, a shaft seal ring can be accommodated in the sealing cover 100 instead of the labyrinth seal 102. In this case, a ground sealing surface must be provided on the adapter shaft 1, specifically against which the sealing ring seals. This surface can also be provided on those adapter shafts 1 that are sealed by a labyrinth seal 102 instead of the shaft seal ring. The labyrinth seal 102 can also be used with a ground sealing surface. Thus, all adapter shafts 1 can be equipped with a ground sealing surface, regardless of the type of seal chosen, i.e., labyrinth seal 102 or shaft seal ring. In a further development, an inclined groove arranged diametrically opposite to the axial slot 7 of the clamping area 5 narrows the clamping area 5 and thus increases its elasticity.In particular, the angled groove intersects an edge of the clamping area 5 and is located circumferentially between two of the bores 2. Advantageously, depending on its dimensions, i.e., groove depth, the angled groove can contribute to balancing the adapter shaft 1, especially since it is not axially continuous.

[0102] In further development, the transverse slot 8 has at its first end in the circumferential direction a first slot end which is curved, and at its other end a second slot end which is straight, in particular not curved.

[0103] The second end of the slot is therefore purely radially oriented. As the radial distance increases, the second end of the slot always maintains the same constant circumferential angle position.

[0104] The first end of the slot, however, exhibits a circumferential angle that increases monotonically, and in particular strictly monotonically, with increasing radial distance. Thus, the circumferential angle range covered by the transverse slot 8 with increasing radial distance is monotonically, and in particular strictly monotonically, increasing. In this way, the adapter shaft has a higher load-bearing capacity; in particular, higher forces can be transmitted.

[0105] Since the adapter shaft 1 is hollow, the transverse slot 8 is therefore limited by the front end of the slot in the circumferential direction and the rear end of the slot 8 located at the other end.

[0106] The curved path of the first slot end is preferably circular arc-shaped. Alternatively, a tangent-shaped or elliptical path is also feasible, as such a path offers even higher load-bearing capacity compared to a circular arc-shaped path.

[0107] The normal to the slot plane of the axial slot 7 is aligned parallel to a tangential direction and / or perpendicular to the normal to the slot plane of the transverse slot 8. It is also important that the inclined groove does not extend axially, but rather that the area covered by the inclined groove in the axial direction is shorter than the area covered in the axial direction by the clamping area 5, which encompasses the area covered in the axial direction by the inclined groove.

[0108] In further embodiments of the invention, the step of the stepped bore is arranged axially centrally in the area covered by the bearing 101 in the axial direction. This allows for increased stability.

[0109] Reference symbol list

[0110] 1 Adapter shaft 2 Axial bore

[0111] 3 Tangential bore for clamping screw

[0112] 4 radial bores

[0113] 5 clamping range

[0114] 6 Connection area 7 Axial slot

[0115] 8 cross slots

[0116] 40 adapter housings

[0117] 50 disc cutters, especially with straight cutting edge; 100 sealing caps

[0118] 101 warehouses

[0119] 102 Labyrinth seal

Claims

- 22 - Patent claims:

1. Adapter shaft for force-fit connection with a shaft, in particular wherein the adapter shaft is hollow, wherein the adapter shaft has a clamping area and a connection area, wherein the shaft is inserted into the clamping area, in particular projects through the clamping area, and is force-fitted to the clamping area, wherein the clamping area has an axial slot (7), in particular wherein the normal of the slot plane of the axial slot is oriented perpendicular to the axis of rotation of the adapter shaft and / or is oriented in a tangential direction with respect to the axis of rotation of the adapter shaft, characterized in that the adapter shaft has a transverse slot (8), in particular wherein the transverse slot (8) is arranged axially between the connection area and the clamping area, in particular in the circumferential angular area covered by the transverse slot and in the area covered by the transverse slot with respect to the axis of rotation of the adapter shaft,Radial spacing range, in particular wherein the normal of the slot plane of the transverse slot is aligned parallel to the axial direction, in particular i.e. parallel to the axis of rotation of the adapter shaft, in particular wherein the transverse slot (8) extends circumferentially over a circumferential angle range which extends in magnitude over at least 90° and at most 270°, - wherein the first circumferential slot end of the transverse slot opens into a first, in particular through, radial bore of the adapter shaft, and / or wherein the second circumferential slot end of the transverse slot opens into a second, in particular through, radial bore of the adapter shaft.

2. Adapter shaft according to claim 1, characterized in that the area covered by the first radial bore in the circumferential direction, in particular in each case, adjoins the area covered by the transverse slot (8) in the circumferential direction, and / or that the area covered by the second radial bore in the circumferential direction, in particular in each case, adjoins the area covered by the transverse slot in the circumferential direction.

3. Adapter shaft according to claim 1 or 2, characterized in that the clear diameter of the first radial bore is larger than the slot width of the transverse slot, in particular wherein the slot width is determined in the axial direction and / or the axial width of the slot, and / or that the clear diameter of the second radial bore is larger than the slot width of the transverse slot, in particular wherein the slot width is determined in the axial direction.

4. Adapter shaft according to one of the preceding claims, characterized in that the opening angle of the transverse slot (8), in particular the clear angular range of the transverse slot determined in the circumferential direction, is more than 180°, in particular to generate a high clamping force, or is less than 180°, in particular to achieve a high Wave resistance, or exactly 180°, so that the first radial bore and the second radial bore are coaxially aligned with each other and can be manufactured or executed together as a single, interrupted radial bore. - 25 - 5. Adapter shaft according to one of the preceding claims, characterized in that the respective slot end of the transverse slot (8), in particular in the circumferential direction, is designed to be straight, in particular extending in a purely radial direction, and / or that the respective slot end of the transverse slot (8), in particular in the circumferential direction, has only a single circumferential angular position.

6. Adapter shaft according to one of the preceding claims, characterized in that the transverse slot (8) is arranged axially between the clamping area and the connection area and / or that the axial slot opens into the transverse slot (8). - 26 - 7. Geared motor with adapter shaft according to one of the preceding claims, characterized in that the geared motor comprises the shaft, in particular rotor shaft, the adapter shaft and a toothed part, in particular sun gear, wherein the toothed part has a running tooth, in particular involute tooth, and a journal axially adjacent to or axially spaced from the running tooth, which has an external tooth, in particular knurled tooth, wherein the journal is positively connected to the adapter shaft, in particular by the external tooth being cut into the adapter shaft.

8. 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 journal 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. - 27 - 9. Geared motor according to one of the preceding claims, characterized in that the toothing of the sun gear is axially spaced from the area covered by the journal in the axial direction, in particular wherein the toothing engages with the respective toothing of planet gears which are rotatably mounted in a planet carrier acting as an output shaft and are engaged with a ring gear connected to the housing part of the gearbox in a rotationally fixed manner.

10. Geared motor according to one of the preceding claims, characterized in that the inner ring of a bearing is mounted on the adapter shaft, the outer ring of which is received in a sealing cover and the sealing cover is centered towards a housing part of the geared motor by positioning the outer ring against a circumferentially circumferential shoulder of the housing part, in particular projecting radially inwards on the housing part, in particular wherein the bearing is a rolling bearing and / or wherein the sealing cover is detachably connected to the housing part.

11. 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 teeth is encompassed by the area covered in the axial direction by the second area. - 28 - 12. 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 step bore is encompassed by the area covered by the bearing in the axial direction.

13. 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 connection area, and / or that the axial width of the transverse slot (8) is at least five times smaller than the clear inner diameter of the first area and / or the outer diameter of the shaft in the area covered by the clamping area in the axial direction, and / or that three axially directed bores, in particular blind bores, are provided in 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, - 29 - in particular wherein the drilling depth of the bores is different, in particular each different, 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 circumferentially middle of the three bores has a smaller distance, in particular circumferential angular distance, to a second of the three bores than to the third of the three bores, in particular wherein one of the three bores acts as a balancing of the transverse slot (8).

14. Geared motor according to one of the preceding claims, characterized in that the clamping area has an axial slot extending through the clamping area in the axial direction and in the radial direction, 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. - 30 - 15. Geared motor according to one of the preceding claims, characterized in that a limiting element, in particular a bolt, is attached 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 rests against the side of the screw head facing away from the threaded area, in particular for spreading the axial slot, wherein 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 the area of ​​the clamping screw projecting out of the clamping area, in particular facing away from the axial slot, 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, and / or that the axial slot opens into the transverse slot (8),wherein the circumferential angle region covered by the axial slot in the circumferential direction is contained within the circumferential angle region covered by the transverse slot (8) in the circumferential direction, in particular wherein the circumferential angle region covered by the axial slot in the circumferential direction is spaced on both sides in the circumferential direction from the ends of the circumferential angle region covered by the transverse slot in the circumferential direction, in particular wherein the slot plane of the axial slot is oriented perpendicular to the slot plane of the transverse slot (8), and / or that a slant groove is arranged in the clamping area, in particular diametrically opposite the axial slot, in particular thus spaced 180° in the circumferential direction from the axial slot, - 31 - in particular wherein the area covered by the slant groove in the axial direction is included in the area covered by the clamping area in the axial direction, and / or that the area covered by the shaft in the axial direction overlaps with the area covered by the bearing in the axial direction, in particular wherein the shaft is received in the first area, in particular in the area covered by the bearing in the axial direction, in a precisely fitting and / or backlash-free manner, and / or that the journal is axially spaced from the first area.

Images