Demonstration model of an electric motor with gearbox

Abstract

Demonstration model of an electric motor with gearbox, comprising at least one housing part and functional parts, in particular such as shaft, motor shaft and / or gear parts, where a hand crank (1) is connected to the motor shaft, in particular rotor shaft, at the axial end region of which is away from the output side, in particular in a rotationally fixed manner, wherein the housing part is designed with a cut-out, in particular that the housing part has a recess, so that functional parts located inside the engine and / or transmission are visible from the outside, wherein the functional parts and cutting edges (6) are deburred, where metallic functional parts are surface-coated with a corrosion-preventing or corrosion-reducing coating, the motor's gearbox is operated without lubrication, so that only the motor's bearings have lubricating grease.

Description

[0001] The invention relates to a demonstration model of an electric motor with gearbox.

[0002] It is known that a motor has a motor shaft that is rotatably mounted in a motor housing. In the case of an electric motor, the motor shaft is a rotor shaft, i.e., a shaft on which a squirrel cage, a field coil, and / or permanent magnets are arranged.

[0003] The demonstration model of a rotary piston engine is known from DE 19 50 420 U as the closest prior art.

[0004] From DE 79 33 161 U1 a device for illustrating the mode of operation of linear induction motors is known.

[0005] Regulations for machinery are known from Directive 2006 / 42 / EC of the European Parliament and of the Council of 17 May 2006 on machinery and amending Directive 95 / 16 / EC (recast), 9.6.2006, pages L 157 / 24-86.

[0006] The invention is therefore based on the objective of further developing a visual model of an engine, with an increase in safety.

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

[0008] Important features of the invention in the demonstration model of an electric motor with gearbox are that it has at least one housing part and functional parts, in particular such as a shaft, motor shaft and / or gear parts, wherein a hand crank is connected to the motor shaft, in particular rotor shaft, at its axial end region facing away from the output side, and in particular is connected in a rotationally fixed manner. wherein the housing part is designed with a cut-out, in particular that the housing part has a recess, so that functional parts located inside the gearbox and / or engine are visible from the outside.

[0009] A key advantage is that the motor can be operated manually, thus increasing safety. Furthermore, manual operation allows for a very low rotor shaft speed, making the rotation of the functional components easily observable through the cutout in the housing. Electrical operation of the motor is prevented. Therefore, this geared motor is suitable for use as a demonstration model or for training purposes.

[0010] In a preferred embodiment, the recess is at least partially closed by a transparent window. This is advantageous because it prevents contact with rotatably mounted parts. Furthermore, the transparent window allows for a tight seal of the gearbox's interior, thus enabling the gearbox to be operated with lubricant.

[0011] According to the invention, the functional parts and edges, in particular the cutting edge, are deburred. An advantage of this is the increased safety.

[0012] According to the invention, metallic functional parts are surface-coated, in particular with a corrosion-inhibiting or corrosion-reducing coating. An advantage of this is that corrosion of steel parts is reduced even upon contact.

[0013] In a preferred embodiment, a fan is arranged on the motor shaft, the outgoing cooling airflow of which is directed along the cooling fins of a housing part of the motor. An advantage of this design is that cooling the motor is simple and easily visible, for example using incense sticks.

[0014] In an advantageous design, the functional components are made of a non-corrosive material such as aluminum or plastic. The advantage here is that corrosion cannot occur, thus ensuring a long service life. Depending on the material chosen, friction losses and / or moments of inertia of the rotatably mounted parts can also be reduced, resulting in particularly easy manual operation.

[0015] According to the invention, the motor's gearbox is operated without lubricant, in particular such that only the motor bearings contain lubricating grease. An advantage of this is that the motor's interior is visible and accessible.

[0016] In a preferred embodiment, the stator windings of the motor are removed, cut once or multiple times, or the winding connections of the stator windings are short-circuited together. The advantage of this is increased safety, as electrical operation of the motor is prevented, thus allowing only manual operation.

[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 a geared motor according to the invention in side view.

[0019] Here, a housing part 5 of the motor is cut into sections, with the cut edge 6 being deburred. This increases safety.

[0020] By means of the cut-out, i.e. an opening in the housing of the motor, functional parts of the motor, for example gears 7 of a gear stage of the geared motor, are clearly visible.

[0021] The geared motor is therefore very suitable as a teaching model.

[0022] Although a stator winding is arranged in housing section 3 and a rotor shaft is rotatably mounted, the stator winding leads are connected to each other in terminal box 4, thus short-circuiting all stator windings. Alternatively, the stator winding is cut at one or more points, rendering it inoperable. This increases safety.

[0023] On the B-side, a fan is arranged on the rotor shaft, the outgoing cooling airflow of which is directed along the axially extending cooling fins of the housing part 3.

[0024] Further on side B is a hand crank 1, with which the rotor shaft can be rotated by hand.

[0025] The gear components of the transmission are arranged in a functional manner. The transmission is either single-stage or, alternatively, in another embodiment according to the invention, multi-stage.

[0026] By turning the hand crank, the rotor shaft can be rotated, which carries a pinion on its A-side axial end area, which acts as the driving toothed part of the first gear stage of the motor's gearbox.

[0027] The output shaft can thus be set in rotation by the hand crank according to the gear ratio of the transmission.

[0028] The functional parts are preferably made of steel, aluminum or plastic.

[0029] All metallic functional parts, especially the output shaft and gear components, are surface-coated, thus preventing corrosion. This coating also prevents corrosion even when exposed to human hands and the resulting transfer of grease, moisture, and salts. A surface treatment with nitrating acid is advantageous.

[0030] The gearbox contains no lubricants, meaning no greases or oils. Only the bearings contain small amounts of grease.

[0031] In a further embodiment according to the invention, the stator winding is removed, so that no electrical operation is possible in any way.

[0032] In another embodiment according to the invention, the cut is closed with a transparent window part, so that contact by persons is prevented. Reference symbol list 1 hand crank 2 fan hood 3 Motor housings 4 junction boxes 5 Gearbox housings, cut away 6 Cutting edge 7 gear 8 Output shaft

Claims

[1] Demonstration model of an electric motor with gearbox, comprising at least one housing part and functional parts, in particular such as shaft, motor shaft and / or gear parts, where a hand crank (1) is connected to the motor shaft, in particular rotor shaft, at the axial end region of which is away from the output side, in particular in a rotationally fixed manner, wherein the housing part is designed with a cut-out, in particular that the housing part has a recess, so that functional parts located inside the engine and / or transmission are visible from the outside, wherein the functional parts and cutting edges (6) are deburred, where metallic functional parts are surface-coated with a corrosion-preventing or corrosion-reducing coating, the motor's gearbox is operated without lubrication, so that only the motor's bearings have lubricating grease. [2] Demonstration model according to claim 1, characterized by that the recess is at least partially closed by a transparent window section. [3] Visual model according to at least one of the preceding claims, characterized by , that a fan is arranged on the motor shaft, the outgoing cooling airflow of which is directed along the cooling fins of a housing part of the motor. [4] Visual model according to at least one of the preceding claims, characterized by that the functional parts are made of a non-corrosive material, such as aluminum or plastic. [5] Visual model according to at least one of the preceding claims, characterized by that the stator windings of the motor are removed, are cut once or several times, or the winding connections of the stator windings are short-circuited together.

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