Geared motor with an electric motor driving a gear

Description

[0001] The invention relates to a geared motor with an electric motor driving a gearbox.

[0002] It is generally known that a geared motor can be designed with an electric motor driving a gearbox.

[0003] A geared motor is known from WO 2013 / 146 260 A1.

[0004] From DE 28 30 191 A1 a device for sealing the gap between parts that can be rotated relative to one another is known.

[0005] From the WO 2016 / 119802 A1 The closest prior art is a sealing arrangement for a gearbox.

[0006] From the DD 30 895 a shaft seal is known.

[0007] From the CN 207111896 U a bearing arrangement is known.

[0008] From the DE 28 30 191 A1 A device for sealing the gap between parts that can be rotated relative to one another is known.

[0009] The invention is therefore based on the object of further developing the operational reliability and service life of a geared motor.

[0010] According to the invention, the object is achieved in the electric motor according to the features specified in claim 1.

[0011] Important features of the invention in the geared motor with an electric motor driving a gearbox are that a bearing flange of the gearbox is attached to a housing part of the gearbox, wherein a bearing for the rotatable mounting of the output shaft of the gearbox is accommodated in the bearing flange, wherein a shaft sealing ring is accommodated in the bearing flange, which seals against the shaft, in particular performs a sealing function, wherein a cover plate is fastened to the bearing flange on the side of the bearing flange facing away from the interior of the gearbox, which is filled in particular with lubricating oil, in particular by means of screws, wherein the cover plate has circumferential grooves on its side facing the bearing flange, wherein a radial bore is formed in the cover plate, which opens into one of the grooves, in particular into the radially outermost of the grooves.

[0012] The advantage of this is that the operational reliability and service life of the geared motor are increased. This is because the grease lubrication, together with the cover plate, improves the service life of the shaft seal and prevents the ingress of dust or dirt, thus increasing operational reliability and service life.

[0013] The cover plate is easy to manufacture and install. It is also important that the grease is filled via a pipeline, allowing it to be filled from a great distance from the gearbox. This also allows a minimum clearance to be maintained, thus avoiding contact with rotating parts and the associated risk of accidents.

[0014] In an advantageous design, a pipe is connected to the cover plate. The advantage here is that no modifications to the gearbox are necessary; the cover plate can be retrofitted, allowing the grease lubrication system and cover plate to be added to an existing system.

[0015] In an advantageous embodiment, a gap, particularly an annular gap, is formed between the cover plate and the shaft. Grease pressure and / or excess grease can be discharged through the gap. This also allows for the expulsion of dirt.

[0016] Important features of the geared motor with an electric motor driving a gearbox according to claim 4 are that a bearing flange of the gearbox is attached to a housing part of the gearbox, wherein a bearing for the rotatable mounting of the output shaft of the gearbox is accommodated in the bearing flange, wherein a shaft sealing ring is accommodated in the bearing flange, which seals against the shaft, in particular performs a sealing function, wherein a cover plate is arranged on the side of the bearing flange facing away from the interior of the gearbox, which is filled in particular with lubricating oil, on the bearing flange and is connected to the shaft in a rotationally fixed manner, in particular wherein the cover plate is placed on the output shaft and is connected to the shaft in a rotationally fixed manner, wherein the cover plate has grooves running around the circumference in the circumferential direction on its side facing the bearing flange, wherein a radial bore is formed in the cover plate, which bore opens into one of the grooves, in particular into the radially outermost of the grooves.

[0017] The advantage of this is that the operational reliability and service life of the geared motor are increased. This is because the grease lubrication, together with the cover plate, improves the service life of the shaft seal and prevents the ingress of dust or dirt, thus increasing operational reliability and service life.

[0018] The cover plate is easy to manufacture and install. It is also important that the grease is filled via a pipe leading to the bearing flange, allowing access from a great distance from the gearbox. This also allows a minimum clearance to be maintained, thus avoiding contact with rotating parts, especially the cover plate, and the associated risk of accidents.

[0019] In particular, a pipe is connected to the bearing flange. This provides a compact solution, as lubrication through the bearing flange requires no additional installation space.

[0020] In particular, the cover plate is tightly connected to the shaft. A benefit is that a labyrinth seal can be formed between the bearing flange and the cover plate.

[0021] In an advantageous design of one of the aforementioned gear motors, the pipeline opens into the radial bore. This is advantageous because the grease can be supplied from a safe position, thus avoiding the risk of accidents or injuries.

[0022] In an advantageous embodiment of one of the aforementioned geared motors, one end of the pipe is attached to a housing part of the electric motor. This allows for grease filling in the area of ​​the motor, and the pipe is routed externally to the motor, i.e., not integrated into the motor. This ensures reliable motor function even if the pipe is defective.

[0023] In an advantageous embodiment of one of the aforementioned geared motors, a grease nipple is arranged at the end area to enable the supply of grease. This is advantageous because it allows for easy supply.

[0024] In an advantageous embodiment of one of the aforementioned geared motors, the grooves are arranged and formed coaxially with each other and / or with the axis of rotation of the output shaft. This is advantageous because a labyrinth can be formed using the grooves and the raised portions axially projecting from the bearing flange.

[0025] In an advantageous embodiment of one of the aforementioned geared motors, the grooves are continuous in the circumferential direction and / or completely circumferential. This provides the advantage of an efficient grease supply and a large storage volume.

[0026] In an advantageous embodiment of one of the aforementioned geared motors, elevations extending in the circumferential direction are formed on the side of the bearing flange facing the cover plate, which protrude into the grooves, in particular to form a labyrinth seal. The advantage here is that a labyrinth can be formed easily, thus providing a high level of tightness and a large storage volume.

[0027] In an advantageous embodiment of one of the aforementioned geared motors, the cover plate has a recess, in particular a round hole, through which the output shaft protrudes. This allows for simple assembly.

[0028] 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.

[0029] The invention will now be explained in more detail using schematic illustrations: In the Figure 1 A geared motor according to the invention with a cut-out output area is shown in side view. In the Figure 2 the output area is enlarged and shown schematically.

[0030] As shown in the figures, a gear 11 is driven by and connected to an electric motor 10.

[0031] A bearing flange 1 of the gearbox 11 is connected to a housing part 12 of the gearbox 11. In particular, the bearing flange 1 is fastened to the housing part 12 by means of screws.

[0032] A bearing 9 is accommodated in the bearing flange 1 for the rotatable support of the output shaft 8 of the gearbox 11.

[0033] The output shaft 8 protrudes from the gearbox 11.

[0034] A shaft seal 7 is arranged on the side of the bearing 9 facing away from the interior. This shaft seal 7 is housed in the bearing flange and seals against the shaft 8. The sealing lip of the shaft seal 7 preferably runs on a precision-machined running surface of the shaft 8.

[0035] A cover plate 2 is fastened to the bearing flange 1 by means of screws 4. For this purpose, the screws 4 are screwed into respective axially directed threaded holes of the bearing flange 1 so that the screw heads of the screws 4 press the cover plate 2 onto the bearing flange 1.

[0036] The gear 11 is preferably designed as an angular gear and mounted such that the rotational axis of the output shaft 8 is aligned parallel to the axial direction. The rotational axis of the rotor shaft of the electric motor 10 is preferably aligned vertically.

[0037] The output shaft 8 extends through a recess in the cover plate 2. Only a small gap is provided between the shaft 8 and the cover plate 2, so that although there is no contact, there is also no significant loss of grease.

[0038] The side of the cover plate 2 facing the bearing flange 1 has coaxially arranged circular grooves. Each of the grooves is uninterrupted in the circumferential direction relative to the axis of rotation of the output shaft 8.

[0039] Further recesses on the side of the cover plate 2 facing the bearing flange 1 run in the radial direction and connect the grooves.

[0040] A radial bore of the cover plate 2 opens into the radially outermost groove.

[0041] A pipe 6, which is externally connected to the radial bore, is connected to the radial bore through which grease can be supplied. The grease is filled at a grease nipple 5 located at the end of the pipe 6 facing away from the bearing flange 1.

[0042] This end of the pipe 6 and / or the grease nipple 5 is or are attached to a housing part of the electric motor 10, in particular to a fan cover of the electric motor 10.

[0043] On the side of the bearing flange 1 facing the cover plate 2, axially protruding, circumferentially extending elevations are formed on the bearing flange, which protrude into the grooves. Thus, a grease-filled labyrinth seal 3 is formed between the cover plate 2 and the bearing flange 1. However, the cover plate 2 is attached to the bearing flange 1 and thus connected in a rotationally fixed manner.

[0044] The labyrinth seal between cover plate 2 and bearing flange 1 thus ensures grease lubrication and grease supply to the running area of ​​the sealing lip of shaft seal 7. Excess grease and / or the reduction of excess pressure in the grease are facilitated through the gap between cover plate 2 and shaft 8. Furthermore, the grease filling of the gap prevents the ingress of dirt.

[0045] In further examples not claimed, the screws 4 are omitted, and the cover plate 2 is connected to the shaft 8 in a rotationally fixed manner. The radial bore is then not located in the cover plate 2, but in the bearing flange 1 and opens next to the recesses, allowing the labyrinth seal to be supplied with grease. The pipe 6 is then connected to the bearing flange 1, in particular to the radial bore. List of reference symbols

[0046] 1 Bearing flange 2 Cover plate 3 Labyrinth seal 4 Screw 5 Grease nipple for grease lubrication 6 Pipe 7 Shaft seal 8 Shaft 9 Bearing 10 Electric motor 11 Gearbox 12 Housing part

Claims

1. Gear motor comprising an electric motor (10) that drives a transmission (11), wherein a bearing flange (1) of the transmission (11) is secured to a housing part (12) of the transmission (11), wherein a bearing (9) for rotatably mounting the output shaft (8) of the transmission (11) is accommodated in the bearing flange (1), wherein a shaft sealing ring (7) which seals toward the shaft, in particular performs a sealing function, is accommodated in the bearing flange (1), wherein a cover disk (2) is secured, in particular by means of screws (4), to the bearing flange (1) on the side of the bearing flange (1) facing away from the interior of the transmission (11), the interior being in particular filled with lubricating oil, characterized in that the cover disk (2) has grooves extending in the circumferential direction on its side facing toward the bearing flange (1), wherein a radial bore is formed in the cover disk (2), which radial bore opens into one of the grooves, in particular into the radially outermost groove.

2. Gear motor according to claim 1, characterized in that a pipe (6) is connected to the cover disk (2).

3. Gear motor according to any one of the preceding claims, characterized in that a gap, in particular an annular gap, is formed between the cover disk (2) and the shaft (8).

4. Gear motor according to any one of the preceding claims, characterized in that the cover disk (2) is secured to the bearing flange (1) on the side of the bearing flange (1) facing away from the interior of the transmission (11), the interior being in particular filled with lubricating oil, and is rotationally fixed to the shaft.

5. Gear motor according to claim 4, characterized in that a pipe (6) is connected to the bearing flange (1).

6. Gear motor according to claim 4 or 5, characterized in that the cover disk (2) is sealingly connected to the shaft (8).

7. Gear motor according to any one of the preceding claims, characterized in that the pipe (6) opens into the radial bore.

8. Gear motor according to any one of the preceding claims, characterized in that an end region of the pipe (6) is secured to a housing part (12) of the electric motor (10).

9. Gear motor according to any one of the preceding claims, characterized in that a grease nipple (5) for enabling a supply of grease is arranged at the end region.

10. Gear motor according to any one of the preceding claims, characterized in that the grooves are arranged and formed coaxially to one another and / or to the axis of rotation of the output shaft (8).

11. Gear motor according to any one of the preceding claims, characterized in that the grooves are uninterrupted in the circumferential direction and / or extend all the way around.

12. Gear motor according to any one of the preceding claims, characterized in that projections that extend in the circumferential direction are formed on the side of the bearing flange (1) facing toward the cover disk (2), which projections project into the grooves, in particular so as to form a labyrinth seal (3).

13. Gear motor according to any one of the preceding claims, characterized in that the cover disk (2) has a cutout, in particular a round hole, through which the output shaft (8) projects.