Rotating electric machine and cover for a rotating electric machine

Abstract

The invention relates to a rotary electric machine (1) comprising an active core with a rotor (7) and a stator (3), the rotor (7) being mounted on a shaft (4), wherein the machine (1) comprises at least one cover (2) connected to the stator (3), the cover (2) having a main body (13) and at least one extension (14) for fixing to the stator (3), the cover (2) of the invention further comprising two opposite legs (15) for attaching the machine to a base or to an external device, wherein each of the legs (15) has a tower portion (16) protruding from the main body (13) of the cover (2) and a beam portion (17) at the end of the tower portion (16), and wherein the beam portion (17) is an elongated portion.

Description

Technical Field

[0001] The present invention relates to a rotary motor, and more specifically, to a rotary motor having a cover connected to the stator. Background Technology

[0002] Rotating electric machines are well-known in the technical field and can include both electric motors and generators. They basically consist of a stationary part (stator) and a rotating part (rotor).

[0003] In some electric motor configurations, the cover of the electric machine is connected to the active core of the machine. While the use of two covers is common, certain applications require machines with a compact size, where the machine has a single cover.

[0004] In fact, specific applications may require different structural features of the machine. For example, the electric motors used in washing machines, in addition to their compact size, also require devices attached to the internal structure of the machine so that they can be properly positioned to drive the washing machine belt.

[0005] Typically, the washing machine motor is attached to an intermediate base, which in turn is attached to the machine structure. Using this additional component complicates the assembly process and limits the diameter of the belt pulleys and the opening of the belt at the drive connection.

[0006] Although the scheme in which the cover is attached to the machine structure via four attachment points is known, this scheme continues to limit the diameter of the washing machine pulleys and the belt opening at the drive connection.

[0007] Therefore, there is a need in the existing technology for a more efficient solution for attaching machines to external devices.

[0008] Purpose of the invention

[0009] One of the objectives of this invention is to provide a rotary motor solution that eliminates the need for an intermediate mounting base.

[0010] Another object of the present invention is to provide a rotary motor solution that can reduce the time required to assemble the machine into another device.

[0011] Another object of the present invention is to provide a rotary motor solution that reduces the number of fastening elements required to assemble the machine into another device.

[0012] Another object of the present invention is to provide a rotary motor solution that can increase the transmission ratio when coupled to another device. Summary of the Invention

[0013] This invention relates to a rotary electric motor comprising an effective iron core having a rotor and a stator, the rotor being mounted on a shaft, wherein the motor includes at least one cover connected to the stator, the cover having a body and at least one extension for attachment to the stator. The cover of the invention further includes two opposing legs for attaching the motor to a base or external device, wherein each leg has a tower portion projecting from the body of the cover and a beam portion at the end of the tower portion, and the beam portion is an elongated portion.

[0014] In an embodiment of the present invention, the beam portion includes an elongated groove.

[0015] In an embodiment of the invention, the beam has at least one hole at each end.

[0016] In a preferred embodiment of the invention, the main body has a circular cross-section, and the two attached legs are at a 180° angle to each other.

[0017] Similarly, in a preferred embodiment, the beam extends in a plane transverse to the tower.

[0018] In an alternative embodiment of the invention, the cover has a third auxiliary leg, which includes a tower portion and a base with a hole. Attached Figure Description

[0019] The present invention will be described in more detail below with reference to the accompanying drawings, in which:

[0020] Figure 1 – is a perspective view of a rotary electric motor according to an embodiment of the present invention;

[0021] Figure 2 – is an exploded view of a rotary electric motor according to an embodiment of the present invention;

[0022] Figure 3 – is a perspective view of a cover for a rotary motor according to an embodiment of the present invention;

[0023] Figure 4 – is another perspective view of a cover for a rotary motor according to an embodiment of the present invention;

[0024] Figure 5 – is a partial schematic diagram of a rotary motor installed in a washing machine structure according to an embodiment of the present invention;

[0025] Figure 6 – This is a schematic diagram of a rotary motor installed in the tub of a washing machine according to an embodiment of the present invention, the tub being partially shown;

[0026] Figure 7– is a schematic top view of a rotary motor installed in the tub of a washing machine according to an embodiment of the present invention;

[0027] Figure 8 – is a front view of a rotary electric motor according to an embodiment of the present invention;

[0028] Figure 9 – is a partial schematic diagram of a rotary motor installed in the frame of a washing machine according to an embodiment of the present invention; and

[0029] Figure 10 – This is a partial schematic diagram of a rotary motor installed in the frame of a washing machine according to a second embodiment of the present invention. Detailed Implementation

[0030] Figure 1 A perspective view of an electric motor 1 according to the invention is shown. Although the drawing shows an electric motor, it should be understood that the invention can be applied to any rotating electric machine. In this sense, the common components of a rotating electric machine—stator, rotor, shaft, and bearings—are known to those skilled in the art and therefore will not be described in detail here.

[0031] Figure 1 The electric motor includes a cover 2 attached to the stator 3. A shaft 4, a fan 5, and a capacitor assembly 6 are also shown. Naturally, the capacitor assembly 6 and the fan 5 are optional and may not appear in alternative embodiments of the invention.

[0032] Figure 2 An exploded view of the electric motor 1 is shown. In addition to the cover 2, stator 3, shaft 4, fan 5, and capacitor 6, the rotor 7, front rolling bearing 8 and rear rolling bearing 9, spring 10, and fastening elements 11 (such as screws) are also shown.

[0033] In the illustrated embodiment, cover 2 is a double-bearing cover and includes: a body 13 having a hub 12, an extension 14 for attachment to the stator, and legs 15 for attaching the machine to a base or external device (e.g., a washing machine). However, it should be noted that this concept can be applied to other types of covers.

[0034] Figure 3 and Figure 4 A preferred embodiment of the invention is shown, wherein the cover 2 has two symmetrically opposed attachment legs 15. Considering the embodiment where the body 13 has a circular cross-section, these two attachment legs form an angle of 180° with each other. It should be noted that in alternative configurations of the invention, the number of attachment legs and the angle of their spacing can be different.

[0035] Each attached leg 15 includes a tower portion 16 protruding from the body 13 and a beam portion 17 at the end of the tower portion 16. In a preferred embodiment of the invention, the beam portion 17 extends in a plane transverse to the tower portion 16.

[0036] The beam portion 17 is preferably a generally flat and elongated section. In the illustrated embodiment, the elongated section has at least one hole 18, 19 for receiving a fastening element. In alternative embodiments of the invention, the beam portion 17 may have other shapes, such as, for example, rounded ends. In other embodiments, the beam portion 17 may not have fastening holes and may be attached to the washing machine simply by press-fit.

[0037] In embodiments of the invention, the area around the hole further includes a guide or groove that acts as a guide for proper positioning when the motor is assembled into the washing machine.

[0038] Figures 5 to 7 An embodiment of the invention is shown, wherein the electric motor 1 is attached to the washing machine 20 (partially shown) by means of fastening elements, or simply the washing machine 20.

[0039] As shown in the figure, in this embodiment, the washing machine 20 has holes corresponding to the holes 18 and 19 of the beam 17 to accommodate fastening elements. In this sense, as Figure 5 and Figure 6 As shown, the washing machine tub may include a structural reinforcement 21 in the area where the fastening element is attached.

[0040] like Figure 7 and Figure 8 As clearly seen, the separation between the two attachment legs 15 creates a free space that allows the machine's belt 24 to be assembled at a large opening angle without interference from the attachment legs. This allows for an increase in the motor's gear ratio and a decrease in the center-to-center ratio of the drive pulleys. This feature of the invention allows for a reduction in the size of the washing machine.

[0041] In fact, as Figure 8 As shown, in a preferred embodiment of the invention, the maximum opening of the band 24 may be between 120° and 130°. In the embodiment shown in the figure, the maximum opening is approximately 124°.

[0042] Beam 17 may also include Figure 4 , Figure 5 and Figure 9 The most visible elongated groove 22 is in the center. This groove reduces the weight of the component and facilitates press-fitting and secure attachment to the washing machine.

[0043] exist Figure 9In one embodiment, the washing machine 20' has an elongated protrusion that forms a track for the elongated groove 22. In this sense, press-fit fixing using fasteners can be eliminated. Naturally, in embodiments of the invention, the beam portion may include the elongated groove 22 and fastening holes, allowing both press-fit fixing and attachment by fastening elements.

[0044] Figure 10 An alternative embodiment of the cover of the present invention is shown. In this embodiment, the cover 2' has a third auxiliary support leg 23 in addition to two symmetrically opposed support legs 15'.

[0045] exist Figure 10 In one embodiment, the cover 2' is attached such that the opening at approximately 124° faces the washing machine belt, and the third auxiliary leg 23 serves as an additional anchoring point for attachment to the washing machine 20'.

[0046] The third auxiliary leg 23 may be a leg with a different shape than leg 15', having no beam portion but a smaller base 17 that extends from the tower portion 16' and has a hole 18' for a fastening element to pass through. Naturally, in alternative embodiments, the base may have a different shape.

[0047] In this second embodiment of the invention, the structural reinforcement 21' of the washing machine 20' has an additional anchor point with a hole corresponding to the hole of the third auxiliary leg.

[0048] Having described examples of embodiments of the invention, it should be understood that the scope of the invention covers other possible variations of the described inventive concept, limited only by the content of the appended claims (including possible equivalents).

Claims

1. A rotary motor (1) comprising an effective iron core having a rotor (7) and a stator (3), the rotor (7) being mounted on a shaft (4), wherein the machine (1) includes at least one cover (2) connected to the stator (3), the cover (2) having a body (13) and at least one extension (14) for fixing to the stator (3), the machine (1) being characterized in that the cover (2) further comprises: Two opposing legs (15) are used to attach the machine to a base or external device. Each of the legs (15) has a tower portion (16) protruding from the body (13) of the cover (2) and a beam portion (17) at the end of the tower portion (16); The beam portion (17) therein is a long strip-shaped portion.

2. The machine according to claim 1, characterized in that, The beam (17) includes an elongated groove (22).

3. The machine according to claim 1 or 2, characterized in that, The beam (17) has at least one hole (19, 20) at each end.

4. The machine according to any one of claims 1 to 3, characterized in that, The main body (13) has a circular cross-section, and the two attached legs (15) form an angle of 180° with each other.

5. The machine according to any one of claims 1 to 4, characterized in that, The beam (17) extends in a plane transverse to the tower (16).

6. The machine according to any one of claims 1 to 5, characterized in that, The cover (2) has a third auxiliary leg (23), which includes a tower portion (16') and a base portion (17') having a hole (18').

7. A cover (2) for a rotary motor (1), the rotary motor being of the type comprising an effective iron core having a rotor (7) and a stator (3), the rotor (7) being mounted on a shaft (4), wherein the cover (2) is connected to the stator (3) of the machine (1), the cover (2) having a body (13) and at least one extension (14) for fixing to the stator (3), characterized in that, The cover (2) further includes: Two opposing legs (15) are used to attach the machine to a base or external device. Each of the legs (15) has a tower portion (16) protruding from the body (13) of the cover (2) and a beam portion (17) at the end of the tower portion (16); The beam portion (17) therein is a long strip-shaped portion.

8. The cover (2) according to claim 7, characterized in that, The beam (17) includes an elongated groove (22).

9. The cover (2) according to claim 7 or 8, characterized in that, The beam (17) has at least one hole (19, 20) at each end.

10. The cover (2) according to any one of claims 7 to 9, characterized in that, The main body (13) has a circular cross-section, and the two attached legs (15) form an angle of 180° with each other.

11. The cover (2) according to any one of claims 7 to 10, characterized in that, The beam (17) extends in a plane transverse to the tower (16).

12. The cover (2) according to any one of claims 7 to 11, characterized in that, The cover (2) has a third auxiliary leg (23), which includes a tower portion (16') and a base portion (17') having a hole (18').

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