drive

Abstract

drive comprising an electric motor (1) and a gearbox (5) as well as a component arranged between the electric motor (1) and the gearbox (5), wherein the component has a first and a second part, wherein a rotor shaft (20) of the electric motor (1) is non-rotatably connected to the first part and a driving shaft (23) of the gearbox (5) is non-rotatably connected to the second part, wherein fan blades (24) are formed or arranged on the second part, wherein the first part is a first clutch part (25) and the second part is a second clutch part (26) of a switchable clutch (2), wherein the second part is designed as a brake disc (22) or brake drum wherein the coupling (2) is designed as a fluid coupling, wherein when an electromagnet is energized a brake shoe is pressed onto the brake disc (22) or brake drum.

Description

[0001] The invention relates to a drive system.

[0002] In industrial drives, it is common practice to use gearboxes driven by electric motors in the three-digit kilowatt or megawatt range. As in Fig. As shown in Figure 1, a clutch 2, a brake 3 and a fan 4 for cooling the gearbox are used between the gearbox 5 and the motor 1.

[0003] From GB 739 854 A, a worm gear motor is known as the closest state of the art.

[0004] From CH 668 670 A a handheld electric tool with a braking device is known.

[0005] From DE 35 08 310 A1 an electromechanical control drive for industrial sewing machines is known.

[0006] The invention is therefore based on the objective of further developing a drive with reduced imbalance.

[0007] According to the invention, the problem is solved in the drive according to the features specified in claim 1.

[0008] Key features of the invention for the drive are that the drive comprises an electric motor and a gearbox as well as a component arranged between the electric motor and the gearbox, wherein the component comprises a first and a second part, wherein the rotor shaft of the electric motor is non-rotatably connected to the first part and the driving shaft of the gearbox is non-rotatably connected to the second part, wherein fan blades are formed or arranged on the second part, in particular formed or arranged such that the airflow preferably drawn in radially by the fan blades is conveyed in an axial direction towards the gearbox, in particular an axial fan is formed on the second part.

[0009] An advantage of this design is that the imbalance is reduced because fan blades are attached to the second part. The airflow generated by the fan blades, the resulting forces, and the mass of the fan blades all contribute to reducing the imbalance. The deflection of the airflow in the axial direction provides a particularly stabilizing effect on the second part.

[0010] In an advantageous embodiment, the second part and the first part are the same part, in particular, which is formed in one piece, and this part is designed as a brake disc or brake drum. An advantage here is that no coupling is necessary, since the rotor shaft and the driving transmission shaft can be directly connected, in particular even in one piece.

[0011] In an advantageous embodiment, the first part is a first clutch part and the second part is a second clutch part of a switchable clutch, in particular a switching clutch. In particular, the torque from the first to the second clutch part can be transmitted or not, depending on the switching state. It is advantageous that a clutch can be used in which the torque from the engine to the transmission can be transmitted or not, depending on the switching state of the clutch. Preferably, the clutch is designed as a hydraulic fluid clutch.

[0012] In an advantageous embodiment, the second part, in particular the second coupling part, is designed as a brake disc or brake drum. The advantage here is that integration of the functions is possible, thus enabling a very compact design, especially with a reduction in imbalance.

[0013] In an advantageous embodiment, the coupling is designed as a fluid coupling, in particular wherein the first and second coupling parts have lamellae on their facing sides. The advantage here is that a particularly simple and reliable coupling can be produced.

[0014] In an advantageous embodiment, when an electromagnet is energized, a brake shoe is pressed against the brake disc or brake drum, particularly against the spring force generated by a spring element. An advantage of this design is that an electrically controlled brake can be manufactured. In this configuration, the coupling component functions as the brake disc or brake drum at its radially outer edge. Actuation of the brake also increases the stability of the second component, thus contributing to a reduction in imbalance.

[0015] In an advantageous embodiment, the fan is integrated into the second part, which also functions as a second coupling component and / or as a brake disc or brake drum. The advantage of this design is that the mass of the second part is increased, and the redirected airflow also contributes to reducing imbalance. Furthermore, a compact design can be achieved.

[0016] In an advantageous embodiment, the first and second parts are enclosed in a common housing, in particular where the fan function, braking function, and / or clutch function are performed. The advantage here is that only a single housing is required for the various functions.

[0017] Further advantages arise from the dependent claims. The invention is not limited to the combination of features of 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, in particular from the problem statement and / or the problem arising from a comparison with the prior art.

[0018] The invention will now be explained in more detail with the help of illustrations: In the Fig. Figure 1 shows the state of the art schematically. In Fig. Figure 2 shows a schematic embodiment according to the invention. In Fig. Figure 3 is a further variant of the embodiment according to the invention, shown schematically. In Fig. Figure 4 is an alternative variant of the embodiment according to the invention, shown schematically.

[0019] As in Fig. As shown in Figure 2, the drive according to the invention has an electric motor 1, the rotor shaft 20 of which is connected to a first coupling part 25 in a rotationally fixed manner.

[0020] A second coupling part 26, arranged coaxially with the coupling part 25, is shaped as a brake disc 22 or is rotationally fixed to a brake disc 22. The brake disc 22 or the second coupling part 26 is rotationally fixed to the driving shaft 23 of a transmission.

[0021] The clutch formed from the first clutch part 25 and the second clutch part 26 is designed to be switchable. Thus, depending on a control device, the clutch is engaged for torque transmission, or alternatively, the torque transmission from the first clutch part 25 to the second clutch part 26 is interrupted.

[0022] By means of a stationary, i.e. non-rotatably connected to the driving shaft 23, the brake disc 22 can be braked and thus torque can be dissipated to the environment via the brake medium 21.

[0023] The actuation of the brake medium 21 is electromagnetically controlled by either energizing or de-energizing an electromagnet. Depending on the energization, the brake medium 21 is pressed against the brake disc 22 or not, so that the brake is effective as a friction brake or not.

[0024] When the electromagnet is not energized, a spring element acts as a return element. Therefore, when the electromagnet is energized, the spring force generated by the spring element must be overcome to press the brake fluid 21 against the brake disc. When the electromagnet is not energized, the return element causes the return movement.

[0025] Fan blades 24 are also formed or arranged on the brake disc 22, in particular on the end face of the brake disc 22 facing the gearbox 5. The fan blades 24 are designed and arranged such that the preferably radially drawn-in airflow is conveyed in an axial direction towards the gearbox 5.

[0026] Thus, an axial fan is formed on a functional part of the brake, namely on the brake disc 22.

[0027] Furthermore, the brake disc 22 and the second clutch part 26 are integrated together.

[0028] The coupling is preferably designed as a fluid coupling, so that the transmitted torque can be controlled in a simple manner, in particular from a stationary control unit.

[0029] The brake can be designed as a shoe brake, in which case the braking medium 21 is a brake shoe that can be pressed onto the brake disc 22 and thus the rotational movement of the brake disc 22 relative to the braking medium 21 can be braked.

[0030] Alternatively, the brake can be designed as a drum brake, in which case the braking medium 21 is a brake shoe that can be pressed onto a brake drum provided instead of a brake disc 22, thus braking the rotational movement of the brake drum relative to the braking medium 21. Fan blades 24 are also formed or arranged on the brake drum, particularly on the end face of the brake drum facing the transmission 5. The fan blades 24 are also designed and arranged such that the preferably radially drawn-in airflow is conveyed axially towards the transmission 5. Thus, an axial fan is formed on the brake drum.

[0031] As in Fig. As shown in Figure 3, in a further embodiment of the invention, the clutch is not present. Thus, the rotor shaft 20 of the motor 1 is non-rotatably connected to the brake disc 22, and the brake disc 22 is in turn non-rotatably connected to the driving shaft of the gearbox 5. Again, an electromagnet is provided for actuating the brake, so that, depending on the current applied, a frictional effect is created between the brake fluid 21 and the brake disc 22. Fan blades 24 are also formed or arranged on the brake disc 22, particularly on the end face of the brake disc 22 facing the gearbox 5. The fan blades 24 are also designed and arranged such that the preferably radially drawn-in airflow is conveyed in an axial direction towards the gearbox 5. Thus, an axial fan is formed on the brake disc 22.

[0032] Alternatively, the brake is again designed as a drum brake, in which the brake drum replaces the brake disc 22 and the braking medium 21, in particular the brake shoe, is pressed against the brake drum – depending on the energization of an electromagnet. Fan blades 24 are also formed or arranged on the brake drum, in particular on the end face of the brake drum facing the gearbox 5. The fan blades 24 are also designed and arranged such that the preferably radially drawn-in airflow is conveyed in an axial direction towards the gearbox 5. Thus, an axial fan is formed on the brake drum.

[0033] As in Fig.As shown in Figure 4, in another embodiment of the invention, no brake is provided, but the first coupling part 25 is non-rotatably connected to the rotor shaft 20 of the electric motor 1, and the second coupling part 26 is non-rotatably connected to the driving shaft 23 of the gearbox 5. Furthermore, fan blades 24 are formed or arranged on the second coupling part 26. The fan blades 24 are also formed and arranged such that the preferably radially drawn-in airflow is conveyed in an axial direction towards the gearbox 5. Thus, an axial fan is formed on the brake drum.

[0034] In the aforementioned embodiments according to the invention, the coupling can be designed as a fluid coupling, so that high torques can be switched. The fan blades 24 are thus attached directly to the coupling.

[0035] In any case, the clutch, fan and / or brake - depending on their presence - are arranged in a single unit and can therefore be protected by a single, and in particular a common, housing. Reference symbol list 1 engine 2 clutch 3 Brake 4 fans 5 gearboxes 20 Rotor shaft of motor 1 21 Brake fluid 22 brake disc 23 Shaft, in particular the driving shaft of the gearbox 5 24 fan blades, especially fan vanes 25 first clutch part 26 second clutch part

Claims

[1] Drive comprising an electric motor (1) and a gearbox (5) and a component arranged between the electric motor (1) and the gearbox (5), wherein the component has a first and a second part, wherein a rotor shaft (20) of the electric motor (1) is non-rotatably connected to the first part and a driving shaft (23) of the gearbox (5) is non-rotatably connected to the second part, wherein fan blades (24) are formed or arranged on the second part, wherein the first part is a first clutch part (25) and the second part is a second clutch part (26) of a switchable clutch (2), wherein the second part is designed as a brake disc (22) or brake drum wherein the coupling (2) is designed as a fluid coupling, wherein when an electromagnet is energized a brake shoe is pressed onto the brake disc (22) or brake drum. [2] Drive according to claim 1, characterized by , that the clutch (2) is a shift clutch. [3] Drive according to at least one of the preceding claims, characterized by , that the fan (4) is integrated into the second part, the second part also functioning as the second clutch part (26) and / or as the brake disc (22) or brake drum. [4] Drive according to at least one of the preceding claims, characterized by that the first and second parts are surrounded by a common housing.

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