Motor and electrical appliance

Abstract

To reduce an axial dimension of a motor to make the motor more compact.SOLUTION: There is provided a motor comprising: a main body having a rotor and a stator; a casing having a cylindrical shape extending along an axial direction, a bottom and an opening, and housing the main body; a busbar assembly located axially above the main body; and a lid located axially above the busbar assembly and covering the opening of the casing. A recess is provided on an upper surface of the busbar assembly. A first through hole is formed in the lid, facing the recess in the axial direction. The motor is connected to an external device via the recess and the first through hole. There is also provided an electrical appliance.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] This application relates to the mechanical and electrical fields, and in particular to motors and electrical products. [Background technology]

[0002] In conventional motor structures, in order to connect or secure the motor to an external device, a member for connecting or securing the motor to the external device must be provided. This requires the motor to have a certain height in the axial direction, which affects the miniaturization of the motor design.

[0003] It should be noted that the above description of the technical background is merely provided to facilitate a clear and complete description of the technical solutions of the present application and to facilitate the understanding of those skilled in the art, and the above technical solutions should not be deemed to be known to those skilled in the art simply because these solutions are described in the background section of the present application. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Patent No. 4902738 Summary of the Invention [Problem to be solved by the invention]

[0005] The inventors have found that in a conventional motor structure, when an external device is connected to the motor, the external device occupies the motor's dimension in the axial direction, resulting in a large axial dimension of the motor.

[0006] In order to solve the above-mentioned problems and other similar problems, embodiments of the present application provide a motor and an electrical product, in which a through hole is provided in a cover portion of the motor, and a recess axially opposite to the through hole is provided in the upper surface of the bus bar assembly, so that the motor is connected to an external device via the through hole and the recess. As a result, a part of the external device is accommodated in the bus bar assembly, thereby reducing the axial dimension of the motor and making the motor more compact. [Means for solving the problem]

[0007] According to a first aspect of the present embodiment, there is provided a motor comprising: a main body portion having a rotor and a stator; a casing having a cylindrical shape extending along the axial direction, having a bottom and an opening, and accommodating the main body portion; a busbar assembly located axially above the main body portion; and a lid portion located axially above the busbar assembly and covering the opening of the casing; wherein a recess is provided on an upper surface of the busbar assembly, and a first through hole is formed in the lid portion facing the recess in the axial direction, and the motor is connected to an external device via the recess and the first through hole.

[0008] In one or more embodiments, an internal thread is formed on the inner surface of the first through hole for screwing to the external device.

[0009] In one or more embodiments, a coupling portion is provided within the first through hole, and the motor is connected to the external device via the recess, the first through hole, and the coupling portion.

[0010] In one or more embodiments, the connecting portion further includes a coupling portion disposed in the first through hole, the coupling portion having a small diameter portion and a large diameter portion, the small diameter portion protruding from the first through hole and positioned axially above the cover portion, and the large diameter portion positioned axially below the cover portion.

[0011] In one or more embodiments, the coupling portion has a second through hole extending axially therethrough and axially opposite the recess, and an internal thread is formed on the inner surface of the second through hole for screwing into the external device.

[0012] In one or more embodiments, a recess is further provided on an upper surface of the busbar assembly, the recess being located within the recess, and the large diameter portion of the coupling portion being at least partially located within the recess.

[0013] In one or more embodiments, the diameter of an inscribed circle of the recess is equal to or greater than the inner diameter of the coupling portion.

[0014] In one or more embodiments, the busbar assembly includes a busbar holder and a busbar fitted into the busbar holder, and the busbar and the recess are axially offset from each other.

[0015] According to a second aspect of the present invention, there is provided an electrical product including the motor according to the first aspect. Effect of the Invention

[0016] One of the beneficial effects of the present embodiment is that by providing a through hole in the cover of the motor and providing a recess axially opposite to the through hole in the upper surface of the bus bar assembly, the motor can be connected to an external device via the recess and the through hole, and by accommodating a part of the external device in the bus bar assembly, the axial dimension of the motor can be reduced, making the motor more compact. [Brief description of the drawings]

[0017] [Figure 1] FIG. 1 is a schematic diagram of a motor according to an embodiment of the present invention; [Diagram 2] FIG. 2 is a perspective view of the motor shown in FIG. 1; [Diagram 3] FIG. 3 is a schematic diagram of the motor shown in FIG. 1 with a cover removed; [Figure 4]FIG. 4 is a schematic diagram of a cover portion of the motor shown in FIG. 1; [Diagram 5] FIG. 5 is a schematic diagram of a joint according to an embodiment of the present invention; [Figure 6] FIG. 6 is a cross-sectional view of a joint according to an embodiment of the present invention; [Figure 7] FIG. 7 is a schematic diagram of a part of the motor according to the embodiment of the present invention after removing the cover. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0018] The embodiments of the present application are disclosed in detail with reference to the following description and drawings. It should be understood that the embodiments of the present application are not limited thereto in scope. The embodiments of the present application include many changes, modifications and equivalents within the spirit and terms of the appended claims.

[0019] Features described and / or shown in one embodiment may be used in the same or similar manner in one or more other embodiments, may be combined with features in the other embodiments, or may be substituted for features in the other embodiments.

[0020] The included drawings are used to provide further understanding of the embodiments of the present application, constitute a part of the specification, and are used to illustrate the embodiments of the present application and explain the principles of the present application together with the written description. Of course, the drawings in the following description are only some embodiments of the present application, and those skilled in the art can obtain other drawings based on these drawings without performing creative labor.

[0021] These and other features of the present application will become apparent from the following specification, taken in conjunction with the drawings. Certain embodiments of the present application, which represent some of the embodiments in which the principles of the present application may be employed, are specifically disclosed in the specification and drawings. It is to be understood that the present application is not limited to the described embodiments, but on the contrary, the present application includes all modifications, variations and equivalents falling within the scope of the appended claims.

[0022] In the embodiments of the present application, the term "and / or" includes any and all combinations of one or more of the associated listed terms. Terms such as "including", "comprising", "having" and the like refer to the presence of stated features, elements, components or assemblies but do not exclude the presence or addition of one or more other features, elements, components or assemblies.

[0023] In the embodiments of the present application, the singular forms "a," "the," and the like can include the plural and should be understood broadly as "a kind" or "a type of," and not limited to the meaning of "one"; and the term "said" should be understood to include the singular and the plural, unless the context clearly indicates otherwise. Also, unless the context clearly indicates otherwise, the term "based on" should be understood to mean "based at least in part on," and the term "based on" should be understood to mean "based at least in part on."

[0024] In the following description of the present application, for convenience of explanation, the direction extending along the central axis OO' of the motor or the direction parallel thereto is referred to as the "axial direction", the radial direction around the central axis OO' is referred to as the "radial direction", the direction surrounding the central axis OO' is referred to as the "circumferential direction", the side moving away from the central axis OO' along the radial direction is referred to as the "radially outer side", the side moving closer to the central axis OO' along the radial direction is referred to as the "radially inner side", the direction from the bottom of the motor housing toward the opening is referred to as the "one axial side", or the "axial upper side", or the "upper side", or the "upper side", and the direction from the opening of the motor housing toward the bottom is referred to as the "other axial side", or the "axial lower side", or the "lower side", or the "lower side". However, it should be noted that these are merely for ease of explanation and do not limit the orientation of the motor during use and manufacture.

[0025] Hereinafter, embodiments of the present invention will be described with reference to the drawings.

[0026] First aspect of the embodiment An embodiment of the present invention provides a motor.

[0027] Fig. 1 is a schematic diagram of a motor according to an embodiment of the present invention. Fig. 2 is a perspective view of the motor shown in Fig. 1. Fig. 3 is a schematic diagram of the motor shown in Fig. 1 with a cover removed. Fig. 4 is a schematic diagram of the cover of the motor shown in Fig. 1.

[0028] As shown in Figures 1 to 3, in this embodiment of the present application, the motor 100 comprises a main body portion 10 (not shown in Figure 1), a casing 20 that houses the main body portion 10, a busbar assembly 30 located axially above the main body portion 10, and a cover portion 40 (not shown in Figure 3) that covers an opening of the motor casing.

[0029] 2, the main body 10 includes a rotor 11 and a stator 12. The rotor 11 may include a rotating shaft, a rotor core, and a plurality of rotor magnets, and the stator 12 may include a stator core, a coil, and an insulating member, and for specific details, see the related art. The main body 10 may further include other members such as bearings, and for specific details, see the related art.

[0030] As shown in FIGS. 1 to 3, the casing 20 has a cylindrical shape extending along the axial direction and has a bottom and an opening. The casing 20 surrounds the main body 10 and is located radially outward of the main body 10.

[0031] As shown in FIGS. 1 and 2, the cover 40 covers the opening of the casing 20 .

[0032] In this embodiment, as shown in FIG. 3, a recess 31 is provided on the upper surface of the busbar assembly 30, and a first through hole 41 is formed in the cover portion 40 opposite the recess 31 in the axial direction, and the motor 100 is connected to an external device via the recess 31 and the first through hole 41.

[0033] According to the above embodiment, a through hole is provided in the cover portion of the motor, and a recess axially opposite to the through hole is provided in the upper surface of the bus bar assembly. Thus, the motor is connected to an external device via the recess and the through hole. As a result, by accommodating a part of the external device in the bus bar assembly, the axial dimension of the motor can be reduced, and the motor can be made smaller.

[0034] 3 shows a circular recess 31 as an example, but the present application is not limited thereto, and the recess 31 may have other shapes, such as a polygonal or irregular shape, as long as it is recessed axially downward with respect to the upper surface of the busbar assembly 30. In addition, in the example of FIG. 3, three recesses 31 are shown, and the present application does not limit the number of recesses 31, and since the recesses 31 are used to connect the motor to an external device, the number, position and shape of the recesses 31 are determined according to the needs of the external device.

[0035] In the above embodiment, the first through hole 41 and the recess 31 face each other in the axial direction, and the number and position of the first through hole 41 correspond to the recess 31. The present application does not limit the method of forming the first through hole 41. For example, as shown in FIG. 4, the cover 40 may be formed first, and then the first through hole 41 penetrating the cover 40 in the axial direction may be formed in the cover 40 by a method such as pressing; alternatively, the cover 40 may be formed by a method such as die casting, and the cover 40 has a portion extending along the radial direction and a portion extending along the axial direction, and the portion extending along the axial direction has the first through hole 41 penetrating in the axial direction, and the portion extending along the axial direction has, for example, a structure shown in FIG. 5 described later, which will be described in detail later. In addition, the cross-sectional shape of the first through hole 41 is determined according to the connection needs of the external device, and may be a circle as shown in FIG. 4, or may have other shapes.

[0036] In the above embodiment, the motor 100 is connected to an external device through the recess 31 and the first through hole 41, and the connection method includes, but is not limited to, screw connection, riveting, adhesive injection, crimp connection, engagement connection, etc. Next, an example will be described.

[0037] In some embodiments, a female screw thread for screwing to an external device is formed on the inner surface of the first through hole 41. This allows the motor 100 to be screwed to an external device only via the recess 31 and the first through hole 41.

[0038] For example, the external device is screwed into the first through-hole 41 via a bolt having an external thread, and the screw connection is achieved by extending into the recess 31 of the bus bar assembly 30 inside the motor 100.

[0039] Furthermore, when the first through hole 41 is formed in the portion extending along the axial direction in the above example, the connection length to the external device is increased, further enhancing the strength and stability of the connection.

[0040] 1 and 2, a coupling portion 51 is provided in the first through-hole 41, and the motor 100 is thereby connected to an external device via the recess 31, the first through-hole 41, and the coupling portion 51. For example, when the first through-hole 41 is formed by pressing the cover portion 40, the coupling portion 51 is provided in the first through-hole 41 to increase the coupling length with the external device.

[0041] Fig. 5 is a schematic diagram of a coupling portion 51 according to an embodiment of the present invention. Fig. 6 is a cross-sectional view of a coupling portion 51 according to an embodiment of the present invention.

[0042] 5 and 6, the coupling portion 51 has a small diameter portion 511 and a large diameter portion 512, and as shown in Fig. 2, the small diameter portion 511 protrudes from the first through-hole 41 and is located on the axial upper side of the cover portion 40, and the large diameter portion 512 is located on the axial lower side of the cover portion 40. This makes it possible to increase the connection length between the motor and the external device without increasing the axial dimension of the motor, thereby further improving the strength and stability of the connection.

[0043] In the above embodiment, the small diameter portion 511 and the large diameter portion 512 are each cylindrical, as shown in Fig. 5. Here, the outer diameter of the small diameter portion 511 is equal to or smaller than the inner diameter of the first through hole 41, and the outer diameter of the large diameter portion 512 is larger than the inner diameter of the first through hole 41. This makes it easier for the small diameter portion 511 to pass through the first through hole 41, while preventing the large diameter portion 512 from protruding from the first through hole 41.

[0044] In some embodiments, as shown in Fig. 6, the small diameter portion 511 and the large diameter portion 512 have the same inner diameter, and since both the small diameter portion 511 and the large diameter portion 512 are cylindrical, each has a through hole, and the through hole of the small diameter portion 511 and the through hole of the large diameter portion 512 together form the second through hole 514 of the coupling portion 51. That is, the coupling portion 51 has a second through hole 514 that penetrates along the axial direction and faces the recess 31 in the axial direction, and a female thread is formed on the inner surface of the second through hole 514 for screwing with an external device. As a result, the external device can be screwed into the second through hole 514 via a bolt having a male thread, and can be screwed by extending into the recess 31 of the busbar assembly 30 inside the motor 100.

[0045] The above embodiment does not limit the manner of connecting the connecting part 51 and the cover part 40. For example, the connecting part 51 may be provided to the first through hole 41 of the cover part 40 by riveting, or may be provided to the first through hole 41 of the cover part 40 by welding.

[0046] 5 and 6, the coupling portion 51 further includes a pressing portion 513. The pressing portion 513 is located between the small diameter portion 511 and the large diameter portion 512 in the axial direction. When the coupling portion 51 is riveted to the first through-hole 41 of the lid portion 40, the pressing portion 513 presses the lid portion 40 to cause deformation, so that the coupling portion 51 and the lid portion 40 are riveted together. In addition, after the coupling portion 51 and the lid portion 40 are riveted, the pressing portion 513 can also prevent the coupling portion 51 from rotating relative to the lid portion 40.

[0047] FIG. 7 is a schematic diagram of a portion of an embodiment of a motor with the lid removed, showing the busbar assembly 30.

[0048] 7, in some embodiments, a recess 32 is further provided on the upper surface of the busbar assembly 30, and the recess 31 is located within the recess 32. That is, in the axial direction, the lower surface of the recess 31 is located below the lower surface of the recess 32, that is, the height of the lower surface of the recess 31 is lower than the height of the lower surface of the recess 32. The large diameter portion 512 of the coupling portion 51 is at least partially housed within the recess 32. This allows the axial dimension of the motor to be further reduced.

[0049] In the above embodiment, the cross section of the recess 32 may be a rectangle extending along the radial direction as shown in FIG. 7, or may be a circle or a polygon, and it is sufficient that the inscribed circle is larger than the outer diameter of the large diameter portion 512 so that the large diameter portion 512 can be positioned within the recess 32, and the present application is not limited thereto.

[0050] In some embodiments, the diameter of the inscribed circle of the recess 31 is equal to or larger than the inner diameter of the coupling portion 51 (i.e., the outer diameter of the second through hole 514). This makes it possible to provide a space for accommodating the bolt for coupling the external device when the external device and the motor 100 are coupled by a bolt.

[0051] 2, in some embodiments, the busbar assembly 30 includes a resin busbar holder 33 and a busbar 34 partially held by the busbar holder 33, and the busbar 34 and the recess 31 are provided so as to be offset in the axial direction, that is, the busbar 34 is not axially below the recess 31. This makes it possible to prevent interference caused by the bolt for connecting an external device being too close to the busbar.

[0052] Although the motor of the present application has been described from different angles in different embodiments, the above-mentioned embodiments can be combined as desired, and the description will be omitted here. Note that the above is merely an illustrative description of the present application, but the present application is not limited to this, and appropriate modifications may be made based on the above-mentioned embodiments.

[0053] In the present embodiment, the motor is mounted on, for example, an automobile and used in a brake system. The motor may also be used for purposes other than braking. For example, the motor may be used as a drive source for other parts of the automobile, such as an engine cooling fan or an oil pump. The motor may also be mounted on home appliances, office automation equipment, medical equipment, etc., to generate various types of drive force.

[0054] According to an embodiment of the present application, a through hole is provided in the cover portion of the motor, and a recess axially opposite to the through hole is provided in the upper surface of the bus bar assembly. Thus, the motor is connected to an external device via the recess and the through hole, and by accommodating a part of the external device in the bus bar assembly, the axial dimension of the motor can be reduced, thereby making the motor more compact.

[0055] Second aspect embodiment The present embodiment provides an electric product having the motor described in the embodiment of the first aspect. The structure of the motor is described in detail in the embodiment of the first aspect, and the contents of the description are incorporated herein, so that the description will be omitted here.

[0056] In the present embodiment, the electrical product may be any device or equipment that uses a motor, such as various home appliances, office automation equipment, industrial equipment, in-vehicle equipment, or components in various equipment, for example, brake components that use a motor.

[0057] It is worth noting that the above is merely an illustrative description of the present application, but the present application is not limited thereto, and appropriate modifications may be made based on the above embodiments. In addition, the above is merely an illustrative description of each component, but the present application is not limited thereto, and the specific content of each component may refer to related art; and components not shown may be added, or one or more components in the drawings may be removed.

[0058] Although the present application has been described above with reference to specific embodiments, those skilled in the art should understand that these descriptions are merely illustrative and do not limit the scope of protection of the present application. Those skilled in the art can make various modifications and alterations to the present application based on the principles of the present application, and these modifications and alterations are also within the scope of the present application.

[0059] The preferred embodiments of the present application have been described above with reference to the drawings. Many features and advantages of these embodiments are apparent from the detailed description, and the appended claims are therefore intended to cover all such features and advantages of these embodiments that fall within their true spirit and scope. In addition, since those skilled in the art can easily think of many modifications and changes, the embodiments of the present application are not limited to the exact structure and operation illustrated and described, but can include all appropriate modifications and equivalents that fall within the scope thereof. [Explanation of symbols]

[0060] 10...main body portion, 11...rotor, 12...stator, 20...casing, 30...busbar assembly, 31...recess, 32...recess, 33...busbar holder, 34...busbar, 40...lid portion, 41...first through hole, 51...coupling portion, 100...motor, 511...small diameter portion, 512...large diameter portion, 514...second through hole

Claims

1. A body including a rotor and a stator; a casing having a cylindrical shape extending along an axial direction, having a bottom and an opening, and accommodating the main body; a bus bar assembly located axially above the main body; a cover portion located axially above the bus bar assembly and covering the opening of the casing; A motor comprising: A recess is provided on an upper surface of the bus bar assembly, a first through hole is formed in the cover portion, the first through hole being opposed to the recess in the axial direction; The motor is connected to an external device via the recess and the first through hole.

2. 2. The motor according to claim 1, wherein an internal thread is formed on an inner surface of the first through hole for screwing to the external device.

3. A coupling portion is provided within the first through hole, The motor according to claim 1 , wherein the motor is connected to the external device through the recess, the first through hole, and the coupling portion.

4. the coupling portion has a small diameter portion and a large diameter portion, 4. The motor according to claim 3, wherein the small diameter portion protrudes from the first through hole and is located on an upper side of the lid portion in the axial direction, and the large diameter portion is located on a lower side of the lid portion in the axial direction.

5. the coupling portion has a second through hole that penetrates along the axial direction and faces the recess in the axial direction, 4. The motor according to claim 3, wherein an internal thread is formed on an inner surface of the second through hole for screwing to the external device.

6. 5. The motor of claim 4, further comprising a recess in an upper surface of the busbar assembly, the recess being located within the recess, and the large diameter portion of the coupling portion being at least partially located within the recess.

7. 6. The motor according to claim 5, wherein a diameter of an inscribed circle of the recess is equal to or larger than an inner diameter of the coupling portion.

8. the bus bar assembly includes a bus bar holder and a bus bar fitted into the bus bar holder, The motor according to claim 1 , wherein the bus bar and the recess are provided so as to be offset from each other in the axial direction.

9. An electrical product comprising the motor according to any one of claims 1 to 8.

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