CN220358984U - Motor with small bearing corrosion - Google Patents

Abstract

The utility model relates to a motor with small bearing corrosion, which comprises a shell, a stator, a rotating shaft, a rotor iron core and a cover plate, wherein the cover plate is fixed on the shell and arranged on the inner wall of the shell, the rotor iron core is fixed on the rotating shaft and positioned in the stator, two ends of the rotating shaft are respectively connected with the shell and the cover plate in a rotating way through bearings, a cavity filled with conductive grease is further arranged in the cover plate, and one end of the rotating shaft stretches into the cavity. According to the utility model, the rotating shaft, the conductive grease and the shell are connected and contacted with each other to form a conduction path, so that the shaft voltage is led out to be grounded; the shaft voltage is prevented from flowing through the bearing, and the problem of electric corrosion is solved; the utility model has simple integral structure, can replace the function of a carbon brush and has cost advantage; meanwhile, the conductive grease is used as a conductor, so that the conductive grease has a cooling effect and simultaneously has a conductive performance.

Description

Motor with small bearing corrosion

Technical Field

The utility model relates to the technical field of motor stators, in particular to a motor with small bearing corrosion.

Background

At present, the driving motor has the problem of bearing electric corrosion: because of the stator core combination seam, stator silicon steel sheet seam, stator and rotor air gap non-uniformity, shaft center and magnetic field center non-uniformity, etc., the motor spindle inevitably rotates in an incompletely symmetrical magnetic field. Thus, an alternating voltage is generated at the two ends of the shaft, and the current can break through grease (oil film) in the bearing, so that the inner ring, the outer ring and the rolling bodies of the bearing are directly contacted, electric shock can be generated on the contacted surfaces, and the channel of the bearing is damaged, thereby causing electric corrosion of the bearing.

Disclosure of Invention

In order to solve the technical problems, the utility model aims to provide a motor with small bearing corrosion, which has the advantages of simple structure, low cost and long service life of the bearing.

In order to achieve the above object, the present utility model adopts the following technical scheme:

the utility model provides a motor that bearing corrosion is little, includes casing, stator, pivot, rotor core and apron, the apron is fixed at the casing setting at shells inner wall, rotor core fixes in the pivot, and is located the stator, the both ends of pivot are connected with casing, apron rotation through the bearing respectively, still be equipped with the cavity that is full of conductive grease in the apron, the one end of pivot stretches into in the cavity.

As a preferable scheme: one end of the rotating shaft extending into the cavity is also provided with stirring teeth for disturbing the conductive grease.

As a preferable scheme: the cavity comprises a through hole on the cover plate, and a buckle cover and a sealing ring which are arranged on two sides of the through hole.

As a preferable scheme: the through hole on the cover plate is positioned at the outer side of the bearing, the sealing ring is sleeved on the rotating shaft and positioned between the through hole and the bearing, and the buckle cover is in interference fit with the upper part of the through hole through the convex edge extending from the bottom.

As a preferable scheme: the cover plate is also provided with a radial through hole, and one end of the radial through hole is communicated with the cavity.

As a preferable scheme: the radial through holes are uniformly arranged at intervals along the circumferential direction, the inner ends of the two radial through holes are communicated with the cavity, and the outer ends of the two radial through holes are respectively connected with the conductive grease pipe.

As a preferable scheme: the two conductive grease pipes are connected with a conductive grease circulation device.

Compared with the prior art, the utility model has the beneficial effects that:

according to the utility model, the rotating shaft, the conductive grease and the shell are connected and contacted with each other to form a conduction path, so that the shaft voltage is led out to be grounded; the shaft voltage is prevented from flowing through the bearing, and the problem of electric corrosion is solved; the utility model has simple integral structure, can replace the function of a carbon brush and has cost advantage; meanwhile, the conductive grease is used as a conductor, so that the conductive grease has a cooling effect and simultaneously has a conductive performance.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiments of the application and together with the description serve to explain the application and do not limit the application.

FIG. 1 is a schematic diagram of the overall structure of the present utility model;

FIG. 2 is a schematic view of the overall structure of the utility model with the buckle cover removed;

FIG. 3 is a schematic cross-sectional view of the present utility model;

fig. 4 is a partially enlarged schematic view of the portion a of fig. 3.

The reference numerals are: 1. a housing; 2. a rotating shaft; 3. a cover plate; 4. a buckle cover; 5. a conductive grease tube; 6. a stator; 7. a rotor core; 8. stirring tooth parts; 9. a seal ring; 10. a radial through hole; 11. and (3) a bearing.

Detailed Description

It should be noted that the following detailed description is illustrative and is intended to provide further explanation of the present application. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the present application. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.

Furthermore, in the description of the present utility model, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "clockwise," "counterclockwise," etc. indicate or are based on the orientation or positional relationship shown in the drawings, merely for convenience of description and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the utility model.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present utility model, unless otherwise specified, the meaning of "a plurality" is two or more, unless otherwise clearly defined.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present utility model, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

The utility model is further illustrated by the following examples in conjunction with the accompanying drawings:

as shown in fig. 1 to 4, a motor with small bearing corrosion comprises a shell 1, a stator 6, a rotating shaft 2, a rotor core 7 and a cover plate 3, wherein the cover plate 3 is fixed at one end of the shell 1, the stator 6 is arranged on the inner wall of the shell 1, the rotor core 7 is fixed on the rotating shaft 2 and positioned in the stator 6, two ends of the rotating shaft 2 are respectively connected with the shell 1 and the cover plate 3 in a rotating way through bearings 11, a cavity filled with conductive grease is further formed in the cover plate 3, and one end of the rotating shaft 2 stretches into the cavity.

The end of the rotating shaft 2 extending into the cavity is also provided with stirring teeth 8 for disturbing the conductive grease. The stirring tooth part 8 can be integrally formed with the rotating shaft, and can be fixed with the rotating shaft in a plugging, welding and other modes after being independently processed.

The cavity comprises a through hole on the cover plate 3, a buckle cover 4 and a sealing ring 9 which are arranged on two sides of the through hole. The through hole on the cover plate 3 is located outside the bearing 11, the sealing ring 9 is sleeved on the rotating shaft 2 and located between the through hole and the bearing 11, and the buckle cover 4 is in interference fit with the upper portion of the through hole through a protruding edge extending from the bottom.

The cover plate 3 is also provided with a radial through hole 10, and one end of the radial through hole 10 is communicated with the cavity. The number of the radial through holes 10 is two, the radial through holes 10 are uniformly arranged at intervals along the circumferential direction, the inner ends of the two radial through holes 10 are communicated with the cavity, and the outer ends of the two radial through holes are respectively connected with the conductive grease pipe 5. The two conductive grease pipes 5 are connected with the conductive grease circulation device, one of the conductive grease pipes is used as a conductive grease inlet channel, the other conductive grease pipe is used as a conductive grease outlet channel, and the conductive grease circulation device can enable the conductive grease to flow, so that the resistance to the rotating shaft can be reduced, and the conductive grease can be more fully contacted with the rotating shaft and the cover plate, so that the shaft voltage can be smoothly grounded everywhere; meanwhile, the flowing conductive grease can improve the cooling effect on the rotating shaft and the cover plate.

The axis voltage deriving path of the utility model is as follows: the stirring tooth part from the rotating shaft to the rotating shaft is connected with the cover plate through conductive grease, then connected with the shell fixed with the cover plate, and finally led out from the grounding point on the shell to be grounded.

In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present utility model. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Although embodiments of the present utility model have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the utility model, and that variations, modifications, alternatives and variations may be made to the above embodiments by those skilled in the art without departing from the spirit and principles of the utility model, and any simple modification, equivalent variation and modification of the above embodiments in light of the technical principles of the utility model may be made within the scope of the present utility model.

Claims (7)

1. The utility model provides a motor that bearing corrosion is little, includes casing (1), stator (6), pivot (2), rotor core (7) and apron (3), the one end at casing (1) is fixed to apron (3), stator (6) set up at casing (1) inner wall, rotor core (7) are fixed on pivot (2), and are located stator (6), the both ends of pivot (2) are rotated through bearing (11) and casing (1), apron (3) respectively and are connected, its characterized in that: the cover plate (3) is internally provided with a cavity filled with conductive grease, and one end of the rotating shaft (2) extends into the cavity.

2. A motor with reduced bearing erosion as in claim 1, wherein: one end of the rotating shaft (2) extending into the cavity is also provided with stirring teeth (8) for stirring the conductive grease.

3. A motor with reduced bearing erosion as in claim 1, wherein: the cavity comprises a through hole in the cover plate (3), and a buckle cover (4) and a sealing ring (9) which are arranged on two sides of the through hole.

4. A motor with reduced bearing erosion as in claim 3, wherein: the through hole on apron (3) is located the outside of bearing (11), sealing washer (9) cover is established on pivot (2), and is located between through-hole and bearing (11), protruding edge and the upper portion interference fit of through-hole that buckle closure (4) extend through the bottom.

5. A motor with reduced bearing erosion as in claim 1, wherein: the cover plate (3) is also provided with a radial through hole (10), and one end of the radial through hole (10) is communicated with the cavity.

6. A motor with reduced bearing erosion as in claim 5, wherein: the two radial through holes (10) are uniformly arranged at intervals along the circumferential direction, the inner ends of the two radial through holes (10) are communicated with the cavity, and the outer ends of the two radial through holes are respectively connected with the conductive grease pipe (5).

7. A motor with reduced bearing erosion as in claim 6, wherein: two conductive grease pipes (5) are connected with a conductive grease circulation device.