CN210517912U

CN210517912U - Electric motor

Info

Publication number: CN210517912U
Application number: CN201920991921.7U
Authority: CN
Inventors: D·克鲁泽; F·艾尔吉; A·斯科克
Original assignee: Ebm Papst Landshut GmbH
Current assignee: Ebm Papst Landshut GmbH
Priority date: 2019-05-27
Filing date: 2019-06-28
Publication date: 2020-05-12
Anticipated expiration: 2029-06-28
Also published as: DE102019114072A1

Abstract

The utility model relates to an electric motor, including two divided stator bundles (10), the stator bundles are so arranged relatively each other that form between stator bundle (10) and be used for holding accommodation space (A) of rotor (30), wherein, every stator bundle (10) comprises first stator bundle part (10a) and rather than the second stator bundle part (10b) that the form fit is connected, wherein, still be equipped with two coil body (41) and with two coil body (41) bearing cap (42) constitution double coil body (40), the bearing cap forms bearing (43) that are used for supporting rotor shaft (31) of rotor (30). According to the invention, a cost-effective, in particular space-optimized, engine is provided in order to optimize and expand the potential energy ratio in an electric motor.

Description

Electric motor

Technical Field

The present invention relates to electric motors, in particular motors having two pole pairs for expanding or optimizing the potential energy ratio.

Background

It is known from the prior art that for various applications a single-strand engine type with two pole pairs is available.

DE 102004053907A discloses a dc motor having a two-pole permanent magnet rotor and an at least two-pole stator, the poles of which carry at least one single stator winding, wherein the stator winding can be supplied with current by an electronic commutation device as a function of the rotor position, wherein a substantially cylindrical air gap is present between the rotor and the stator. The engine is characterized in that at least one stator pole or a specially provided auxiliary pole is provided with an auxiliary winding which is supplied with current in order to start the engine. According to a preferred embodiment of the invention, the auxiliary winding can also be used as a sensor winding for determining the rotor position.

Other electric motors with a simple construction are known from the prior art for applications such as ventilation in household appliances. For example, the electric motor can be simply constructed in a plastic housing or as a platform module for integration.

The motor type with four poles requires a large amount of installation space, so that it is generally not space-saving or can not be integrated at all into specific applications. Furthermore, the manufacturing costs associated with the technical principle are always a limiting factor for the motor application.

SUMMERY OF THE UTILITY MODEL

The object of the present invention is therefore to overcome the aforementioned disadvantages and to provide an engine which can be produced cost-effectively, in particular with an optimized installation space, in order to optimize and expand the potential energy ratio in the electric motor.

According to the invention, this object is achieved by: an electric motor is provided, comprising at least two separate stator beams which are arranged relative to one another such that a receiving space for receiving a rotor is formed between the stator beams, wherein each stator beam is formed from a first stator beam section and a second stator beam section which is connected thereto in a form-fitting or material-bonded manner, wherein a double coil body is provided which is formed from two coil bodies and a bearing cap which is connected to the two coil bodies and forms a bearing for supporting a rotor shaft of the rotor.

Preferably, at least the surface of the bearing cap is composed of a non-conductive material.

Preferably, the two stator beams have the same construction.

Preferably, the two first stator beam portions of each stator beam are each constructed substantially in an L-shape from two support arms and one support arm is constructed for receiving one of the two coil bodies.

Preferably, the two second stator beam portions of each stator beam are configured by the arm substantially in an i-shape and have a connecting profile on the connecting section of the arm.

Preferably, the connection contour is intended for a form-fitting connection with a corresponding connection contour configured on the respective first stator beam section.

Preferably, the corresponding connection profile is configured as a dovetail connection.

Preferably, the bearing cap is constructed in two parts.

Preferably, the bearing cap is embodied as a bearing cap encapsulated with plastic by injection molding, so that an electrical connection between the rotor and the stator is prevented thereby.

Preferably, the bearing cap is alternatively or additionally configured with a fastening hole and fastened to the stator bundle.

Preferably, an arc-shaped segmented portion defining a housing space of the rotor is provided on one of the arms on the respective first and second stator beam portions, respectively.

In this respect, the following measures are proposed according to the invention, which also relate to the positioning of the stator:

the measure a: the bearing cap is constructed from plastic and in particular in two parts,

measure b: the bearing cap is configured as a plastic-encapsulated bearing cap,

and c: providing holes or openings in separate stator bundles for mechanical fastening to the bearing caps, and/or

Measure d: a double coil body integrated with a bearing cap is provided.

According to the invention, a motor is provided for this purpose, which comprises two separate stator bundles, which are arranged relative to one another such that a receiving space for receiving the rotor is formed between the stator bundles, wherein each stator bundle is formed by a first stator bundle part and a second stator bundle part which is connected thereto in a form-fitting manner, wherein a double coil body is also provided which is formed by two coil bodies and a bearing cap which is connected to the two coil bodies and which forms a bearing for supporting the rotor shaft of the rotor.

In an alternative embodiment, the double coil former is formed integrally with the bearing cap and/or is fastened to the stator packet part.

In an advantageous embodiment of the invention, it is provided that at least the surface of the bearing cap is made of an electrically non-conductive material. Alternatively, the entire bearing cap may be molded or formed from a non-conductive (i.e., insulative) material.

Also advantageous is an embodiment in which the two stator beams have the same construction and can therefore be manufactured as a homogeneous piece. A compact design can thereby be achieved by an essentially symmetrical arrangement with respect to the rotor.

In a further advantageous embodiment of the invention, it is provided that the two first stator beam sections of each stator beam are each formed substantially in an L shape by two support arms "S1, S2" and that one support arm is formed for receiving one of the two coil bodies 41. The second limb extends in the direction of the rotor receptacle and advantageously has an arcuate segment portion on one side, which delimits the rotor receptacle.

Furthermore, it is advantageous if the two second, further stator beam sections of each stator beam are formed substantially in the shape of an i by a support arm "S3", wherein a connecting contour, in particular for a positive-locking connection with a corresponding connecting contour, is formed on a connecting section of the support arm, on which the first stator beam sections are respectively located. The windings can thus be mounted on the stator beam in an efficient manner. The likewise arc-shaped segment part for defining the rotor receiving space extends in the direction of the rotor receiving portion over the other, i.e. opposite end section of the essentially i-shaped limb.

In a further advantageous embodiment of the invention, it is provided that the corresponding connection contour is configured as a dovetail connection. The two arms are arranged in parallel to each other with the two stator beam sections connected, and the two arc-shaped segment sections are arranged next to each other in such a way that they form a substantially semi-cylindrical restriction to the rotor receiving space.

In an equally advantageous embodiment of the electric motor according to the invention, it is provided that the bearing cap is constructed in two parts. For this purpose, the separating plane extends parallel to the support arms which carry the windings and at the same time pass through the symmetrical arrangement of the double coil former approximately in the middle.

It is also advantageous to provide a solution in which the bearing is embodied as a bearing cap that is encapsulated with plastic by injection molding and in particular, electrical connection between the rotor and the stator is thereby prevented.

The bearing caps may alternatively or additionally be formed with fastening holes and fastened to the stator bundle, wherein, at this point, attention is optionally paid to the insulating connection.

According to the invention, a cost-effective, in particular space-optimized, engine is provided in order to optimize and expand the potential energy ratio in an electric motor.

Drawings

Further preferred embodiments of the invention are explained in detail below with the description of preferred embodiments of the invention with reference to the drawings. Wherein:

fig. 1 shows a schematic cross-sectional view of an electric motor according to the invention, an

Fig. 2 shows a side view of an embodiment of a double coil body according to the invention of an electric motor.

Detailed Description

The invention is explained in detail below with reference to fig. 1 and 2, wherein like reference numerals refer to like structural and/or functional features.

Fig. 1 shows a schematic cross-sectional view of an electric motor 1 according to the invention. The motor 1 comprises two separate stator beams 10, which are arranged opposite to each other with respect to a central rotor position. Between the stator bars 10 on the left and right sides, there is an accommodation space a for accommodating the rotor 30.

Each of the stator beams 10 (i.e., the stator beams 10 on the left and right sides in fig. 1 and 2, respectively) is formed of a first stator beam portion 10a and a second stator beam portion 10b connected in a form-fitting manner thereto. As shown and seen in fig. 1, the two stator beams 10 have the same configuration.

The respective first stator beam sections 10a of each stator beam 10 are each constructed substantially L-shaped from two limbs S1, S2, which extend at an angular orientation of approximately 90 ° to one another. The respective arm S2 is designed to receive one of the two coil bodies 41, which are shown schematically in the drawing.

The two second stator beam portions 10b of each stator beam 10 are substantially configured in an i-shape by the arm S3. At one end of the limb S3 and at its connecting section 13, a connecting contour 14 is formed, which serves in particular for a form-fitting connection with a corresponding connecting contour 11 of the limb S2 on the respective first stator beam section 10 a. In this case, the

corresponding connection profiles

11, 14 are designed as dovetail connections which engage in the installed state in a form-fitting manner into one another.

Furthermore, in the exemplary embodiment of fig. 2, a double coil body 40 is formed from two coil bodies 41, wherein each coil body 40 is wound and mounted on a support arm S2 of the respective stator beam 10. The double coil former 40 also comprises a two-part bearing cap 42, on which a bearing 43 for supporting the rotor shaft 31 of the rotor 30 is formed.

Arc-shaped segmented portions T defining the rotor receiving space a are provided on the arms S1 and S3 of the corresponding

stator beam portion

10a or 10b, respectively. By arranging two stator bars 10 comprising four arc-shaped segment sections T, a cylinder-like shaped receiving contour for the rotor is obtained (but with an air gap LS that varies in the circumferential direction), wherein the receiving contour is interrupted by a narrow gap S between each two segment sections T arranged directly next to one another.

The embodiments of the present invention are not limited to the foregoing preferred embodiments. Rather, a plurality of variants is conceivable which can be used for the illustrated embodiments even in fundamentally different types of embodiments.

Claims

1. An electric motor, characterized by comprising at least two separate stator beams (10) which are arranged relative to each other such that a receiving space (a) for receiving a rotor (30) is formed between the stator beams (10), wherein each stator beam (10) is formed by a first stator beam section (10a) and a second stator beam section (10b) which is connected thereto in a form-fitting or material-fitting manner, wherein a double coil body (40) is provided which is formed by two coil bodies (41) and a bearing cover (42) connected to the two coil bodies (41), which bearing cover forms a bearing (43) for supporting a rotor shaft (31) of the rotor (30).

2. The motor according to claim 1, characterized in that at least the surface of the bearing cap (42) is composed of a non-conductive material.

3. The motor according to claim 1 or 2, characterized in that the two stator beams (10) have the same configuration.

4. The motor according to claim 1 or 2, characterized in that the two first stator beam portions (10a) of each stator beam (10) are each constructed substantially in an L-shape from two arms and one arm is constructed for receiving one of the two coil bodies (41).

5. The motor according to claim 4, characterized in that the two second stator beam portions (10b) of each stator beam (10) are constructed substantially i-shaped by the arm and have a connecting profile on the connecting section (13) of the arm.

6. The electric motor according to claim 5, wherein the connection profile is adapted for a form-fitting connection with a corresponding connection profile configured on the respective first stator beam portion (10 a).

7. The electric motor of claim 6, wherein the corresponding connection profile is configured as a dovetail connection.

8. The electric motor according to claim 1 or 2, characterized in that the bearing cap (42) is constructed in two parts.

9. The electric motor according to claim 1 or 2, characterized in that the bearing cap (42) is embodied as a bearing cap that is injection-molded with plastic, such that an electrical connection between the rotor and the stator is prevented thereby.

10. The electric motor according to claim 1 or 2, characterized in that the bearing cap (42) is alternatively or additionally configured with fixing holes and fixed on the stator bundle (10).

11. The motor according to claim 5, wherein an arc-shaped segmented portion (T) defining a receiving space (A) of the rotor is provided on one of the arms on the respective first and second stator beam portions, respectively.