ADAPTER, IN PARTICULAR FOR A GEAR MOTOR, WITH AN ADAPTER SHAFT AND A COUPLING PART AS WELL AS A BEARING, IN PARTICULAR ROLLER BEARING

Description

[0001] The invention relates to an adapter, in particular for a geared motor, with an adapter shaft and a coupling part as well as a bearing, in particular a rolling bearing.

[0002] It is commonly known that a geared motor has an electric motor that drives a gearbox.

[0003] From DE 10 2019 003 546 A1 is an adapter for a drive is known.

[0004] From the DE 10 2016 117 466 A1 The closest state of the art is a pulley assembly with adapter.

[0005] From the DE 10 2015 210 227 A1 a drive train is known.

[0006] From the WO 2015 / 036832 A1 a wave connection is known.

[0007] From the DE 20 2011 000964 U1 An electric motor linear drive is known.

[0008] From the DE 10 2009 009 459 A1 A claw coupling is known.

[0009] The invention is based on the task of designing a geared motor as compact as possible.

[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 adapter are that the adapter is provided in particular for a geared motor, with an adapter shaft and a coupling part as well as a bearing, in particular a rolling bearing, wherein the adapter part has claws, in particular claws projecting in the axial direction, wherein the inner ring of the bearing is placed on a bearing seat provided on the adapter shaft, in particular a finely machined bearing seat, wherein the bearing seat covers in the axial direction a first region in which the bearing seat is continuous in the circumferential direction, and a second region in which the bearing seat is interrupted in the circumferential direction, in particular with multiple interruptions.

[0012] The advantage here is that the adapter is very compact. However, it features an interrupted bearing seat. Since the interrupted bearing seat is located in the claw area, and the claws are designed to be very rigid due to the high torque that must be transmitted, the bearing is held with sufficient stability.

[0013] In an advantageous embodiment, a damping part is arranged between the claws of the coupling part and the claws of the adapter shaft, In particular, the damping part comprises a base body and radially projecting areas formed thereon, wherein the radial areas are arranged axially between a claw of the coupling part and one of the adapter part. This is advantageous in that torque transmission is possible without play and torque fluctuations can be dampened.

[0014] In an advantageous embodiment, a circumferential recess, in particular a

[0015] A recess is formed on the adapter shaft. The advantage here is that, although the bearing seat is also interrupted at this point, the adapter shaft's bulges in the area of ​​the recess are spaced apart from the inner ring of the bearing. These bulges are caused when the claws are elastically deflected, particularly when torque surges are transmitted.

[0016] In an advantageous embodiment, the area covered by the claws in the axial direction encompasses the second area and is spaced axially from the first area. Advantageously, the bearing seat includes both areas and the claws are spaced from the uninterrupted area. Thus, this stable area is decoupled from the elastically deflectable claws.

[0017] In particular, the axial direction is aligned parallel to the axis of rotation of the adapter shaft, in particular wherein the circumferential direction and / or the radial distance is or are related to this axis of rotation.

[0018] In an advantageous design, the inner ring is axially limited on both sides by retaining rings. The advantage here is that the first bearing is designed as a locating bearing.

[0019] In an advantageous embodiment, a first retaining ring is received in a first annular groove, in particular in a first annular groove that runs completely and / or continuously in the circumferential direction, of the adapter shaft and delimits the inner ring, wherein the first annular groove is spaced axially from the first region and / or from the claws. It is advantageous that the first retaining ring is received in a stable, uninterrupted annular groove. However, the second retaining ring is received in an interrupted annular groove, i.e., one formed in the claws.

[0020] In an advantageous embodiment, a second retaining ring defines the inner ring, particularly on the side of the inner ring facing away from the first retaining ring in the axial direction, with the second retaining ring being received in a second annular groove. This advantageously defines the inner ring of the bearing, even if the limitation is located in the seating area, which is designed with multiple interruptions in the circumferential direction. This results in a particularly compact solution.

[0021] In an advantageous embodiment, the second annular groove is designed with multiple interruptions in the circumferential direction, and / or the second annular groove is arranged in the second region. This advantageously results in a very compact adapter, since the inner ring of the bearing partially protrudes axially into the area of ​​the claws.

[0022] In an advantageous embodiment, the second annular groove is formed in the claws of the adapter part and / or in the claws of the coupling part. This advantageously ensures that the retaining ring is securely held in the axial direction.

[0023] In another advantageous embodiment, the second annular groove is continuous in the circumferential direction and is incorporated into the coupling part. This provides the advantage that the axial locking is not directly in the adapter shaft, but in another part, namely the coupling part. Thus, the inner ring even partially protrudes beyond the claw area of ​​the coupling part. This allows for a very compact adapter design.

[0024] In an advantageous embodiment, the adapter has a housing which has a first and a second housing part, The first housing part is connected to the second housing part, with the outer ring of the bearing being accommodated in the first and second housing parts and centering the first housing part relative to the second housing part. The advantage here is that the outer ring centers the two housing parts relative to each other. Thus, the bearing also performs a centering function.

[0025] In an advantageous embodiment, the bearing is designed as a fixed bearing. The advantage here is that the bearing is axially fixed.

[0026] In an advantageous embodiment, the adapter has a second bearing, in particular a bearing designed as a loose bearing, The outer ring of the shaft is accommodated in the first housing part and the inner ring of the shaft is mounted on the adapter shaft. A shaft seal is accommodated in the first housing part, in particular on the side of the second bearing facing away from the coupling part, which seals against the adapter shaft, in particular with its sealing lip running on the adapter shaft. The advantage here is that, in the event of thermally induced length changes, the distance between the fixed bearing and the floating bearing can be changed because the floating bearing is axially displaceable, in particular slightly displaceable.

[0027] Important features of the gear motor with an adapter are that the gear motor has an electric motor and a gearbox, wherein a rotor shaft is connected in a rotationally fixed manner to the coupling part, in particular by means of a key connection, wherein the adapter shaft is connected in a rotationally fixed manner or is formed in one piece, in particular in one piece, with a driving toothed part of the transmission.

[0028] The advantage here is that the gear motor can be designed to be as compact as possible.

[0029] 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.

[0030] The invention will now be explained in more detail using schematic illustrations: In the Figure 1A claw coupling according to the invention with adapter shaft 1 is shown exploded. Figure 2 The claw coupling is shown in section. Figure 3 An adapter is shown in a sectional view, including the claw coupling. Figure 4 A side view of the adapter shaft 1 is shown. Figure 5 is an excerpt from the Figure 4 enlarged. In the Figure 6 A second claw coupling is shown in a cut-away oblique view.

[0031] As in the Figures 1 to 5 As shown, the adapter shaft 1 has claws 5 at its axial end region facing the coupling part 7, which claws cover an axial region that overlaps the axial region covered by claws 8 of the coupling part 7.

[0032] The axial direction is parallel to the rotational axis of the adapter shaft 1. The radial distances are related to the rotational axis of the adapter shaft 1.

[0033] A damping part 6 is shaped like a plastic star. For this purpose, the damping part 6 has an annular base body on which radially projecting beam areas are formed.

[0034] The base body is arranged radially within the claws 5 and 8. The radial spacing area covered by the beam areas in the radial direction encompasses or at least overlaps the radial spacing area covered by the claws 5 of the adapter shaft 1 in the radial direction and the radial spacing area covered by the claws 8 of the coupling part 7 in the radial direction.

[0035] The damping part 6, in particular the beam areas, are arranged in the circumferential direction between the claws 5 of the adapter shaft 1 and the claws 8 of the coupling part 7.

[0036] The beams are spherical in the radial direction. Thus, the wall thickness of the respective beam area, measured in the circumferential direction, exhibits a local maximum in the radial direction.

[0037] The area covered in the axial direction by the claws 5 of the adapter shaft 1 overlaps with the area covered in the axial direction by the claws 8 of the coupling part 7.

[0038] The coupling part is placed on a rotor shaft 20, which projects through the coupling part 7 into a hollow area of ​​the adapter shaft 1.

[0039] The rotor shaft 20 is connected to the coupling part 7 in a rotationally fixed manner, in particular by means of a key connection.

[0040] A bearing is placed on the adapter shaft 1, which preferably functions as a fixed bearing.

[0041] For this purpose, the inner ring 3 of the bearing is placed on the adapter shaft 1 and axially limited on both sides by means of two retaining rings (2, 4).

[0042] A first retaining ring 2 of the two retaining rings (2, 4) is provided in a first annular groove of the adapter shaft 1, wherein this first annular groove is spaced axially from the area axially covered by the claws 5 of the adapter shaft 1. Thus, the first annular groove is designed to be completely continuous in the circumferential direction.

[0043] The second retaining ring 2 of the two retaining rings (2, 4) is provided in a second annular groove of the adapter shaft 1, wherein this second annular groove is arranged axially within the area covered axially by the claws 5 of the adapter shaft 1. Thus, the second annular groove is designed with multiple interruptions in the circumferential direction. This is because the claws 5 are spaced apart from each other in the circumferential direction, in particular evenly.

[0044] Since the inner ring 3 of the bearing is mounted on the adapter shaft 1 and touches the adapter shaft 1 in the axial area between the two retaining rings 2 and 4, the inner ring 3 is not supported in the areas between the claws 5. The bearing seat is therefore designed with multiple interruptions in the circumferential direction.

[0045] The bearing seat formed on the adapter shaft 1 for receiving the inner ring 3 thus covers an area in the axial direction which overlaps with the area covered by the claws 5 of the adapter part 1 in the axial direction.

[0046] Thus, the bearing seat is interrupted in a first area and uninterrupted in another area.

[0047] The first section contributes 30% to 70% of the total axial width of the bearing seat. The other, uninterrupted section contributes the remaining portion.

[0048] However, a design in which the first region contributes less than half, i.e. less than 50%, of the total axial width of the bearing seat is particularly preferred.

[0049] As is particularly evident in Figure 5 which covers an area of Figure 4As can be seen in the enlarged view, a recess 50 is formed on the adapter part 1, which runs in the circumferential direction. The recess 50 is preferably machined by turning, in particular, as a recess.

[0050] This recess 50 is arranged in the axial transition region between the first and the further region. Thus, the recess 50, in particular the recess, is arranged at the edge of the region covered by the claws 5 in the axial direction.

[0051] The recess 50, in particular the recess, thus delimits the area of ​​the bearing seat which is interrupted in the circumferential direction from the rest of the bearing seat, i.e. from the area of ​​the bearing seat which is uninterrupted in the circumferential direction.

[0052] Therefore, the recess 50 is arranged in the axial direction between the first annular groove for the first retaining ring 2 and the second annular groove for the second retaining ring 4.

[0053] As in Figure 3As shown, a second bearing is placed on the adapter shaft 1, which is accommodated in a second housing part 31 and functions as a loose bearing.

[0054] The second housing part 31 is connected to a first housing part 30, in particular by means of screws.

[0055] Although the inner ring 3 of the first bearing has - as described above - a partially interrupted bearing seat, the outer ring of this first bearing is partially accommodated in the first housing part 30 and partially in the wide housing part 31.

[0056] Thus, the outer ring of the first bearing centers the first housing part 30 relative to the second housing part 31. Furthermore, the first housing part 30 accommodates a shaft seal 33, which seals against the adapter shaft 1. Thus, the first housing part can be connected to a transmission housing whose interior is at least partially filled with oil.

[0057] The adapter shaft extends into the gearbox and is non-rotatably connected to a driving gear part of the gearbox.

[0058] Preferably, the outer diameter of the claws 8 of the coupling part 7 is smaller than the clear inner diameter of the second retaining ring 4, which is accommodated in the circumferentially interrupted annular groove of the adapter part 1. Thus, no

[0059] In further embodiments according to the invention, the driving gear part is designed as one piece with the adapter shaft 1, i.e. as a single piece.

[0060] When executing according to Figure 6 In contrast to the version according to Figure 2 not axially through the inner ring 3, but the inner ring 3 projects beyond the adapter part 1 axially towards the coupling part 60, whose claws 8 are also correspondingly shorter compared to Figure 2 .

[0061] The second retaining ring 4 is thus received in an annular groove of the coupling part 60 and limits the inner ring 3 accordingly.

[0062] In this way, a particularly small axial width of the coupling can be achieved, wherein the inner ring 3 is delimited on the one hand by the first retaining ring 2, which is received in an annular groove of the adapter part 1, and on the other hand by the second retaining ring 4, which is received in an annular groove of the coupling part 60. List of reference symbols

[0063] 1 Adapter shaft 2 Retaining ring 3 Inner ring of the fixed bearing 4 Retaining ring 5 Claws 6 Damping part 7 Coupling part 8 Claws 20 Rotor shaft 30 First housing part 31 Second housing part 32 Floating bearing 33 Shaft seal 50 Recess, circumferential recess 60 Coupling part

Claims

1. An adaptor for a geared motor, having an adaptor shaft (1) and a coupling part (7) as well as a bearing, wherein the adaptor part of the adaptor has claws (5), in particular claws (5) projecting in an axial direction, wherein the inner ring (3) of the bearing is placed onto a bearing seat provided at the adaptor shaft (1), wherein the bearing seat covers, in an axial direction, a first region, in which the bearing seat is uninterrupted in a circumferential direction, and a second region, in which the bearing seat is interrupted in a circumferential direction, characterised in that a second retaining ring (2) delimits the inner ring (3), at that side of the inner ring remote in an axial direction from the first securing ring (4), wherein the second securing ring (2) is received in a second annular groove.

2. An adaptor according to claim 1, characterised in that a damping part (6) is arranged between the claws of the coupling part (7) and the claws (5) of the adaptor shaft (1), wherein the ray regions are each arranged axially between one claw of the coupling part (7) and one claw of the adaptor part.

3. An adaptor according to any one of the preceding claims, characterised in that a cutout (50) encircling in a circumferential direction is formed at the adaptor shaft (1), between the first region and the second region in an axial direction.

4. An adaptor according to any one of the preceding claims, characterised in that the region covered by the claws (5) in an axial direction comprises the first region and is at a distance from the second region in an axial direction.

5. An adaptor according to any one of the preceding claims, characterised in that the axial direction is oriented parallel to the rotational axis of the adaptor shaft (1).

6. An adaptor according to any one of the preceding claims, characterised in that the inner ring (3) is axially delimited on both sides by retaining rings.

7. An adaptor according to any one of the preceding claims, characterised in that a first retaining ring (4) is received in a first annular groove of the adaptor shaft (1) and delimits the inner ring (3), wherein the first annular groove is at a distance from the first region in an axial direction.

8. An adaptor according to any one of the preceding claims, characterised in that the second annular groove is interrupted in a circumferential direction and wherein the second annular groove is arranged in the second region.

9. An adaptor according to any one of the preceding claims, characterised in that the second annular groove is made in the claws (5) of the adaptor part and in the claws of the coupling part (7).

10. An adaptor according to claim 8, characterised in that the second annular groove is uninterrupted in a circumferential direction and is made in the coupling part (7).

11. An adaptor according to any one of the preceding claims, characterised in that the adaptor has a housing which has a first and a second housing part (30), wherein the first housing part (30) is connected to the second housing part (31), wherein the outer ring of the bearing is received in the first and in the second housing part (30) and centres the first housing part with respect to the second housing part (31).

12. An adaptor according to any one of the preceding claims, characterised in that the bearing is in the form of a fixed bearing.

13. An adaptor according to any one of the preceding claims, characterised in that the adaptor has a second bearing, whose outer ring is received in the first housing part (30) and whose inner ring (3) is placed onto the adaptor shaft (1).

14. A geared motor having an adaptor according to any one of the preceding claims, characterised in that the geared motor has an electric motor and a gear unit, wherein a rotor shaft (20) is connected to the coupling part (7) in a rotationally-fixed manner, in particular by means of a feather key connection, wherein the adaptor shaft (1) is connected in a rotationally-fixed manner to a driving toothing part of the gear unit or is formed in one-piece, in particular integrally, therewith.