CN212785078U - Motor and electric product - Google Patents

Abstract

The embodiment of the application provides a motor and electric product, the motor has: a rotor having a rotation axis; a stator that is radially opposed to the rotor; a bearing rotatably supporting the rotary shaft radially outside the rotary shaft; a code wheel which is indirectly or directly fixed to the rotation shaft; a housing that houses the rotor, the stator, the bearing, and the encoder disk, the housing having a cover portion perpendicular to a center axis of the rotary shaft and a cylindrical portion extending in an axial direction from a radially outer edge of the cover portion; a circuit board disposed on an inner surface of the cover; a sensor which is arranged on the upper side of the circuit board in the axial direction and detects the rotation position of the rotor; and a bracket that is located on an axial upper side of the cylindrical portion and fixes the stator, and the bracket has a base portion that extends in a radial direction, covers an opening of the cylindrical portion that is away from the cover portion, and is fixed with an end portion of the cylindrical portion.

Description

Motor and electric product

Technical Field

The present application relates to the field of electromechanics, and in particular, to a motor and an electrical product.

Background

When the motor works, the rotation state of the motor needs to be monitored, and the monitoring is usually carried out by adopting an encoding disc and a sensor. A common sensor is an optical sensor, wherein an encoding disk and a photoelectric breaker are arranged outside a shell of a motor, the encoding disk is fixed on a rotating shaft of the motor, the encoding disk is clamped between a light-emitting part and a light-sensitive part of the photoelectric breaker in a non-contact state, the rotating shaft of the motor drives the encoding disk to rotate, and therefore the rotating state of the motor is monitored through a pulse signal sent by the photoelectric breaker.

However, the inventor finds that when monitoring is performed by adopting the above structure, dust is easily adhered to the code disc, so that the photosensitive effect of the photoelectric breaker is affected, the pulse signal output by the photoelectric breaker is unstable, and the monitoring precision is reduced.

It should be noted that the above background description is only for the convenience of clear and complete description of the technical solutions of the present application and for the understanding of those skilled in the art. Such solutions are not considered to be known to the person skilled in the art merely because they have been set forth in the background section of the present application.

SUMMERY OF THE UTILITY MODEL

To solve at least one of the above problems or other similar problems, embodiments of the present application provide a motor and an electric product.

According to an aspect of embodiments of the present application, there is provided a motor having: a rotor having a rotating shaft that rotates around a central axis thereof; a stator radially opposed to the rotor; a bearing that rotatably supports the rotary shaft radially outside the rotary shaft; a code wheel indirectly or directly fixed to the rotation shaft; a housing that houses the rotor, the stator, the bearing, and the encoder disk, the housing having a cover portion perpendicular to the central axis and a cylindrical portion extending in an axial direction from a radially outer edge of the cover portion; a circuit board disposed on an inner surface of the cover; a sensor which is arranged on the upper side of the circuit board in the axial direction and detects the rotation position of the rotor; and a bracket that is located on an axially upper side of the cylindrical portion and fixes the stator, and that has a base portion that extends in a radial direction, covers an opening of the cylindrical portion that is remote from the cover portion, and is fixed to an end portion of the cylindrical portion.

In at least one embodiment, the bracket further has a fixing portion extending from a surface of the base portion on the inside of the housing toward the cover portion in the axial direction, the fixing portion being located radially outside the bearing.

In at least one embodiment, an end of the fixing part near the cover part is closer to the cover part than an end of the bearing near the cover part.

In at least one embodiment, there is an axial gap between an end of the bearing proximate the abutment portion and a face of the abutment portion proximate the bearing; a gap in the radial direction exists between at least a part of the radially outer side surface of the bearing and the radially inner side surface of the fixing portion.

In at least one embodiment, the bracket further has a stepped portion that extends in an axial direction from a face of the pedestal portion on the outside of the housing, and an outer diameter of the stepped portion is smaller than an outer diameter of the pedestal portion.

In at least one embodiment, the bracket further has an extension portion extending in an axial direction from a surface of the stepped portion, the surface being away from the outer shell, an accommodation space being formed between a radially inner surface of the extension portion and a radially outer surface of the rotary shaft, and a bushing being disposed in the accommodation space.

In at least one embodiment, a first spacer member is further provided in the accommodation space, the first spacer member being located axially below the bushing.

In at least one embodiment, a second spacing member is further disposed in the accommodating space, the second spacing member being located axially below the first spacing member.

In at least one embodiment, the motor further has a fixing member disposed on an outer circumference of a side of the rotating shaft adjacent to the cover portion,

the fixing piece is provided with a groove extending along the radial direction, and the coding disc is embedded and fixed in the groove.

In at least one embodiment, an outer peripheral surface of one end of the bearing near the abutment portion is formed with an inclined surface.

In at least one embodiment, the housing and the bracket are a snap fit.

In at least one embodiment, the housing and the bracket are constructed of a metallic material.

According to another aspect of embodiments of the present application, there is provided an electrical product having the motor according to any one of the preceding embodiments.

One of the beneficial effects of the embodiment of the application lies in: through setting up coding disc and sensor inside the shell of motor, can prevent that the dust from bonding to the surface of coding disc and sensor to can improve the pulse signal's of sensor output stability, and then improve the monitoring accuracy.

Specific embodiments of the present application are disclosed in detail with reference to the following description and drawings, indicating the manner in which the principles of the application may be employed. It should be understood that the embodiments of the present application are not so limited in scope. The embodiments of the present application include many variations, modifications, and equivalents within the scope of the terms of the appended claims.

Features that are described and/or illustrated with respect to one embodiment may be used in the same way or in a similar way in one or more other embodiments, in combination with or instead of the features of the other embodiments.

It should be emphasized that the term "comprises/comprising" when used herein, is taken to specify the presence of stated features, integers, steps or components but does not preclude the presence or addition of one or more other features, integers, steps or components.

Drawings

Elements and features described in one drawing or one implementation of an embodiment of the application may be combined with elements and features shown in one or more other drawings or implementations. Moreover, in the drawings, like reference numerals designate corresponding parts throughout the several views, and may be used to designate corresponding parts for use in more than one embodiment.

The accompanying drawings, which are included to provide a further understanding of the embodiments of the application, are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the principles of the application. It is obvious that the drawings in the following description are only some embodiments of the application, and that for a person skilled in the art, other drawings can be derived from them without inventive effort. In the drawings:

figure 1 is a schematic view of a motor of an embodiment of the present application as viewed from one direction,

fig. 2 is an axial cross-sectional view of the motor shown in fig. 1.

Fig. 3 is a schematic view of a bracket of an embodiment of the present application, viewed from one direction.

Detailed Description

The foregoing and other features of the present application will become apparent from the following description, taken in conjunction with the accompanying drawings. In the description and drawings, particular embodiments of the application are disclosed in detail as being indicative of some of the embodiments in which the principles of the application may be employed, it being understood that the application is not limited to the described embodiments, but, on the contrary, is intended to cover all modifications, variations, and equivalents falling within the scope of the appended claims. Various embodiments of the present application will be described below with reference to the drawings. These embodiments are merely exemplary and are not intended to limit the present application.

In the embodiments of the present application, the terms "first", "second", "upper", "lower", and the like are used to distinguish different elements by name, but do not indicate a spatial arrangement, a temporal order, and the like of the elements, and the elements should not be limited by the terms. The term "and/or" includes any and all combinations of one or more of the associated listed terms. The terms "comprising," "including," "having," and the like, refer to the presence of stated features, elements, components, and do not preclude the presence or addition of one or more other features, elements, components, and elements.

In the embodiments of the present application, the singular forms "a", "an", and the like include the plural forms and are to be construed broadly as "a" or "an" and not limited to the meaning of "a" or "an"; furthermore, the term "comprising" should be understood to include both the singular and the plural, unless the context clearly dictates otherwise. Further, the term "according to" should be understood as "at least partially according to … …," and the term "based on" should be understood as "based at least partially on … …," unless the context clearly dictates otherwise.

In the following description of the embodiments of the present application, for the sake of convenience of description, a radial direction around the center axis O of the rotation shaft of the motor is referred to as a "radial direction", a direction around the center axis O is referred to as a "circumferential direction", a direction along the center axis O or a direction parallel thereto is referred to as an "axial direction", a side away from the center axis O in the radial direction is referred to as a "radially outer side", a side closer to the center axis O in the radial direction is referred to as a "radially inner side", a side closer to the lid portion of the motor housing in the axial direction is referred to as an "axially lower side", a side opposite to the "axially lower side is referred to as an" axially upper side ", a surface located inside the motor housing is referred to as an" inner side ", and a surface located outside the motor housing is referred to as an.

Embodiments of the first aspect

Embodiments of a first aspect of the present application provide a motor, fig. 1 being a schematic view of an example of the motor as viewed from the outside of the motor, and fig. 2 being a schematic view of an axial cross-section of the motor shown in fig. 1.

In the embodiment of the present application, as shown in fig. 2, the motor 1 includes a rotor 10, a stator 20, a bearing 30, an encoding disk 40, a housing 50, a circuit board 60, a sensor 70, and a bracket 80.

Wherein, the rotor 10 has a rotation shaft 100, the rotation shaft 100 rotates with its central axis O as the center; the stator 20 is opposed to the rotor 10 in the radial direction; the bearing 30 supports the rotary shaft 100 radially outside the rotary shaft 100, and rotatably supports the rotary shaft 100; the encoder disk 40 is fixed to the rotary shaft 100 indirectly or directly, and for example, the encoder disk 40 may be directly bonded to the rotary shaft 100 by an adhesive or may be fixed to the rotary shaft 100 by a fixing member (for example, a fixing member 93 described later); the housing 50 accommodates the rotor 10, the stator 20, the bearing 30, and the encoding disk 40.

As shown in fig. 2, the housing 50 has a cover portion 500 perpendicular to the central axis O and a cylindrical portion 510 extending in the axial direction from the radially outer edge of the cover portion; the circuit board 60 is disposed on the inner surface of the cover 500; the sensor 70 is disposed on the upper side in the axial direction of the circuit board 60, and detects the rotational position of the rotor 10. The present application does not limit the specific method of detecting the rotational position of the rotor 10 by the sensor 70, and reference may be made to the related art.

In at least one embodiment, the sensor 70 and the code wheel 40 may be of any type, for example, the sensor 70 may be an optical sensor and the code wheel 40 may be a grating, although the type of the sensor 70 and the code wheel 40 is not limited in this application. Further, the sensor 70 may also detect the rotational speed of the rotor 10. The present application does not limit the specific method of detecting the rotation speed of the rotor 10 by the sensor 70, and reference may be made to the related art.

In at least one embodiment, the circuit board 60 may be a PCB (printed circuit board). The present invention is not limited to this, and the circuit board 60 may be an FPC (flexible circuit board), whereby the internal space of the motor 1 can be reduced and the motor can be thinned.

In at least one embodiment, as shown in fig. 1, the bracket 80 is located at an axially upper side of the cylindrical portion 510 and fixes the stator 20 (not shown in fig. 1). For example, a fixing portion 810 (described later) of the bracket 80 is axially press-fitted into a radially inner side of the stator 20 to fix the stator 20.

Fig. 3 is a schematic view of the carriage as viewed from one direction. As shown in fig. 3, the bracket 80 has a base part 800, and the base part 800 extends in the radial direction. As shown in fig. 2, the base part 800 covers the opening of the cylindrical part 510 away from the cover part 500 and is fixed to the end of the cylindrical part 510.

Accordingly, by providing the encoder disk 40 and the sensor 70 inside the housing 50 of the motor 1, it is possible to prevent dust from adhering to the surfaces of the encoder disk 40 and the sensor 70, to improve the stability of the pulse signal output by the sensor 70, and to improve the monitoring accuracy.

In at least one embodiment, as shown in FIG. 3, the bracket 80 also has a fixation portion 810, the fixation portion 810 extending axially from one face of the abutment portion 800.

For example, as shown in fig. 2, the fixing portion 810 extends from a surface of the base portion 800 on the inner side of the housing 50 (a surface on the lower side in the axial direction shown in fig. 2) toward the lid portion 500 in the axial direction, and the fixing portion 810 is located on the outer side in the radial direction of the bearing 30. For example, the bearing 30 may be pressed into the fixing portion 810.

In at least one embodiment, as shown in fig. 2, an end 810a of the fixing part 810 near the cover part 500 is closer to the cover part 500 than an end 30a of the bearing 30 near the cover part 500. That is, the axially lower end 810a of the fixing portion 810 is located axially lower than the axially lower end 30a of the bearing 30.

This can prevent the lubricating oil in the bearing 30 from splashing.

In at least one embodiment, as shown in the right partially enlarged view in fig. 2, there is a gap SL1 in the axial direction between the axially upper face of the end portion 30b of the bearing 30 close to the pedestal portion 800 and the face 801 of the pedestal portion 800 close to the bearing 30; a gap SL2 in the radial direction exists between at least a part of the radially outer side surface of the bearing 30, for example, a part near the end 30b, and the radially inner side surface of the fixing portion 810.

Therefore, the gaps SL1 and SL2 are small, so that the lubricating oil overflowing from the bearing can flow back to the bearing, the lubricating oil is prevented from leaking outside, and the service life of the motor is prolonged.

In at least one embodiment, as shown in FIG. 3, the bracket 80 further has a stepped portion 820, the stepped portion 820 extends axially from the other face of the base portion 800, and an outer diameter D1 of the stepped portion 820 is smaller than an outer diameter D2 of the base portion 800.

For example, as shown in fig. 2, the stepped portion 820 extends axially upward from a surface of the base portion 800 on the outside of the housing 50 (axially upward surface), and the outer diameter of the stepped portion 820 is smaller than the outer diameter of the base portion 800.

In at least one embodiment, as shown in fig. 3, a threaded hole 820a may be formed in the stepped portion 820 and may be penetrated in the axial direction, and the motor of the present embodiment may be fixed to another external device by the threaded hole 820a through a bolt, for example, the motor of the present embodiment may be fixed to a device of a client.

In at least one embodiment, as shown in fig. 3, the bracket 80 also has an extension 830, the extension 830 extending axially from a face of the stepped portion 820 that is distal from the abutment portion 800.

For example, as shown in fig. 2, the extending portion 830 extends axially upward from a surface (axially upper surface) of the stepped portion 820 that is distant from the housing 50.

In at least one embodiment, as shown in fig. 2, an accommodation space SA is formed between a radially inner side surface of the extension 830 and a radially outer side surface of the rotary shaft 100, and the bushing 90 is disposed in the accommodation space SA. This can prevent the lubricant in the bearing from leaking out.

In at least one embodiment, as shown in fig. 2, a first spacing member 91 is further disposed in the accommodating space SA, the first spacing member 91 is located at an axially lower side of the bushing 90, and the first spacing member 91 is rotatable with the rotating shaft 100. This can further prevent the lubricant from leaking out.

In at least one embodiment, as shown in fig. 2, a second spacing member 92 is further provided in the accommodating space, and the second spacing member 92 is located axially below the first spacing member 91. This can further prevent the lubricant from leaking out.

In at least one embodiment, the first and second spacing members 91 and 92 may be formed of an oil-resistant and wear-resistant resin material, and further, the material of the first spacing member 91 may be different from that of the second spacing member 92, thereby preventing the first and second spacing members 91 and 92 from rotating together. The material of the first spacing members 91 may be the same as the material of the second spacing members 92, and the material of the first spacing members 91 and the material of the second spacing members 92 are not limited in the embodiments of the present application.

Further, the types of the first and second spacing members 91 and 92 may be selected according to actual needs, for example, the first and second spacing members 91 and 92 may be spacers. The present embodiment does not limit the types of the first and second spacing members 91 and 92.

In at least one embodiment, as shown in fig. 2, the motor 1 may further include a fixing member 93, the fixing member 93 is disposed on an outer periphery of an axially lower portion of the rotating shaft 100, the fixing member 93 has a groove extending in the radial direction, and the encoder disk 40 is fitted and fixed in the groove.

For example, as shown in fig. 2, the fixing member 93 is disposed on the outer periphery of the rotating shaft 100 on the side closer to the cover 500. The fixing member 93 may include a fixing seat 931 fixed to a radially outer side of the rotary shaft 100 and a fixing ring 932 fixed to an axially lower side of the fixing seat 931, the code plate 40 being fitted in a groove between the fixing seat 931 and the fixing ring 932. This makes it possible to reliably fix the encoder disk 40 to the rotary shaft 100, and is advantageous in that the sensor 70 stably outputs the pulse signal obtained by detecting the encoder disk 40.

In the present embodiment, the material of the fixing member 93 may be selected according to actual requirements, and in at least one embodiment, the fixing member 93 may be formed of an aluminum material, or may be formed of a copper material. The material of the fixing member 93 is not limited in the embodiments of the present application.

In at least one embodiment, the outer circumferential surface of one end of the bearing 30 near the abutment portion 800 is formed with an inclined surface. For example, as shown in the right partially enlarged view of fig. 2, the outer periphery of the end portion 30b of the bearing 30 is formed with the inclined surface 301, thereby facilitating the pressing of the bearing 30 into the fixing portion 810 of the bracket 80.

In at least one embodiment, the type of bearing 30 may be selected according to the actual need, for example, the bearing 30 may be a sleeve bearing. The embodiment of the present application does not limit the type of the bearing 30.

In at least one embodiment, the housing 50 is a snap fit with the bracket 80. For example, as shown in the left partially enlarged view of fig. 2, the fitting engagement of the housing 50 with the bracket 80 may be achieved by press-fitting an axially upper end portion 500a of the cylindrical portion 500 of the housing 50 onto an axially upper face of the base portion 800 (for example, a process of broken lines to solid lines of the end portion 500a in fig. 2). Thereby, the interior of the motor 1 can be sealed, dust is prevented from entering the interior of the motor, and further dust is prevented from adhering to the surfaces of the encoder disk 40 and the sensor 70, thereby improving the monitoring accuracy.

Further, by fixing the housing 50 to the surface of the base part 800 of the bracket 80 and connecting the stepped part 820 of the bracket 80 to the devices of the customer premises, the motor 1 can be further thinned, and the size of the stepped part 820 can be adjusted to suit the devices of the customer premises.

In at least one embodiment, the housing 50 and the bracket 80 are constructed of a metallic material. For example, the housing 50 is formed of a stainless material, and the bracket 80 is formed of an aluminum material. The metal material constituting the housing 50 and the bracket 80 is not limited in the embodiments of the present application.

In addition, the motor of the embodiments of the present application may further include other components, which may be referred to in particular in the related art, and the embodiments of the present application are not specifically described herein.

According to the embodiment of the first aspect of the application, the coding disc and the sensor are arranged inside the shell of the motor, so that dust can be prevented from being adhered to the surfaces of the coding disc and the sensor, the stability of a pulse signal output by the sensor can be improved, and the monitoring precision is improved.

Embodiments of the second aspect

Embodiments of the second aspect of the present application provide an electrical product having the motor described in embodiments of the first aspect. Since the structure of the motor has been described in detail in the embodiment of the first aspect, the contents thereof are incorporated herein, and the description thereof is omitted here.

In the embodiment of the second aspect of the present application, the type of the electrical product is not limited, and the electrical product may be a window driving device, a product such as an air conditioner, a water dispenser, a washing machine, a sweeper, a compressor, a blower, a blender, or an electrical device in other fields.

According to the embodiment of the second aspect of the present application, by disposing the encoder disk and the sensor inside the housing of the motor, dust can be prevented from adhering to the surfaces of the encoder disk and the sensor, so that the stability of the pulse signal output by the sensor can be improved, and the monitoring accuracy can be improved.

The present application has been described in conjunction with specific embodiments, but it should be understood by those skilled in the art that these descriptions are intended to be illustrative, and not limiting. Various modifications and adaptations of the present application may occur to those skilled in the art based on the spirit and principles of the application and are within the scope of the application.

Claims (13)

1. A motor, characterized in that the motor has:

a rotor having a rotating shaft that rotates around a central axis thereof;

a stator radially opposed to the rotor;

a bearing that rotatably supports the rotary shaft radially outside the rotary shaft;

a code wheel indirectly or directly fixed to the rotation shaft;

a housing that houses the rotor, the stator, the bearing, and the encoder disk, the housing having a cover portion perpendicular to the central axis and a cylindrical portion extending in an axial direction from a radially outer edge of the cover portion;

a circuit board disposed on an inner surface of the cover;

a sensor which is arranged on the upper side of the circuit board in the axial direction and detects the rotation position of the rotor; and

and a bracket that is located on an axially upper side of the cylindrical portion and fixes the stator, and that has a base portion that extends in a radial direction, covers an opening of the cylindrical portion that is remote from the cover portion, and is fixed to an end portion of the cylindrical portion.

2. The motor of claim 1,

the bracket further includes a fixing portion extending from a surface of the base portion on an inner side of the housing toward the cover portion in an axial direction, the fixing portion being located on a radially outer side of the bearing.

3. The motor of claim 2,

an end of the fixing portion closer to the cover portion is closer to the cover portion than an end of the bearing closer to the cover portion.

4. The motor of claim 2,

a gap in the axial direction exists between an end portion of the bearing close to the abutment portion and a surface of the abutment portion close to the bearing;

a gap in the radial direction exists between at least a part of the radially outer side surface of the bearing and the radially inner side surface of the fixing portion.

5. The motor of claim 1,

the bracket further includes a stepped portion extending in an axial direction from a surface of the base portion on the outer side of the housing, and an outer diameter of the stepped portion is smaller than an outer diameter of the base portion.

6. The motor of claim 5,

the bracket further has an extension portion extending in an axial direction from a face of the stepped portion away from the housing,

an accommodation space is formed between a radially inner surface of the extending portion and a radially outer surface of the rotary shaft, and a bush is disposed in the accommodation space.

7. The motor of claim 6,

a first spacer member is also disposed in the accommodating space, the first spacer member being located axially below the bushing.

8. The motor of claim 7,

a second spacing member is further disposed in the accommodating space, the second spacing member being located axially below the first spacing member.

9. The motor of claim 1,

the motor further includes a fixing member disposed on an outer periphery of the rotating shaft on a side close to the cover portion,

the fixing piece is provided with a groove extending along the radial direction, and the coding disc is embedded and fixed in the groove.

10. The motor of claim 1,

an inclined surface is formed on the outer peripheral surface of one end of the bearing close to the base portion.

11. The motor of claim 1,

the shell and the bracket are in tabling fit.

12. The motor of claim 1,

the housing and the bracket are formed of a metal material.

13. An electrical product, characterized in that it has a motor according to any one of claims 1 to 12.

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