Motor and electric product

Abstract

To downsize a motor by shortening the axial length of the motor.SOLUTION: An embodiment of the present application provides a motor and an electric product. The motor includes a stator core, and a bus bar assembly disposed on one side of the stator core in the axis direction. The bus bar assembly includes a bus bar holder and a bus bar that is partially fitted in the bus bar holder. The bus bar includes a claw portion exposed from the bus bar holder. A tooth portion of the stator core is insulated from a coil wound around the tooth portion via an insulating member. The bus bar holder includes a main body portion having an annular shape. The main body portion faces the insulating member in a radial direction. According to the present application, the main body portion of the bus bar holder is disposed so as to face the insulating member in a radial direction so that the bus bar holder is prevented from excessively occupying the dimension in the axis direction.SELECTED DRAWING: Figure 1

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 a conventional motor structure, a bus bar holder is provided axially above an insulating member, and the claws of the bus bar holder are supported on a stator core. In general, the claws of the bus bar holder are fixed to the back of the stator core, i.e., to the radially outer side of the teeth of the stator core.

[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] China Utility Model No. 218335501 Specification Summary of the Invention [Problem to be solved by the invention]

[0005] The inventor discovered that in conventional motor structures, the bus bar holder is fixed to the back of the stator core by claws, occupying space in the axial direction, resulting in a large axial dimension of the motor.

[0006] To solve the above problems and other similar problems, embodiments of the present application provide a motor and electrical product in which the main body of the bus bar holder is arranged to radially face the insulating member so that the bus bar holder does not occupy additional dimension in the axial direction, thereby shortening the axial length of the motor and making the motor more compact. [Means for solving the problem]

[0007] According to a first aspect of an embodiment of the present application, there is provided a motor comprising a stator core and a busbar assembly arranged on one axial side of the stator core, the busbar assembly comprising a busbar holder and a busbar, a portion of which is fitted into the busbar holder, the busbar having a claw portion exposed from the busbar holder, and teeth of the stator core being insulated from a coil wound around the teeth by an insulating member, wherein the busbar holder has an annular main body portion and the main body portion is radially opposed to the insulating member.

[0008] In one or more embodiments, the body portion of the bus bar holder is located radially outside the insulating member.

[0009] In one or more embodiments, the openings of the prongs face radially inward.

[0010] In one or more embodiments, the inner surface of the main body portion of the busbar holder has a convex portion, and the outer surface of the insulating member, which is radially opposed to the main body portion, has a concave portion that fits into the convex portion.

[0011] In one or more embodiments, the busbar portion that fits into the body portion is a tip-like structure with an extended surface parallel to the central axis of the motor.

[0012] In one or more embodiments, the axial projections of the busbar portions that fit into the body portion lie on the same circumference having the same radial dimension.

[0013] In one or more embodiments, the number of the bus bars is multiple, and the claw portions of the multiple bus bars have the same height in the axial direction.

[0014] In one or more embodiments, the body portion of the bus bar holder is located radially inward of the insulating member.

[0015] In one or more embodiments, the openings of the prongs face radially outward.

[0016] 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

[0017] One of the beneficial effects of the present embodiment is that by arranging the main body of the bus bar holder so as to be radially opposite the insulating member and preventing the bus bar holder from occupying any extra dimension in the axial direction, the axial length of the motor can be shortened, thereby making the motor more compact. [Brief description of the drawings]

[0018] [Figure 1] FIG. 1 is a schematic diagram of a partial assembly of a motor according to an embodiment of the present invention. [Diagram 2] FIG. 2 is a plan view of a partial assembly of the motor shown in FIG. [Diagram 3] FIG. 3 is a schematic diagram of a busbar assembly according to an embodiment of the present invention. [Figure 4] FIG. 4 is a schematic diagram of an insulating member according to an embodiment of the present invention. [Diagram 5] FIG. 5 is a schematic diagram of multiple bus bars of a bus bar assembly according to an embodiment of the present invention. [Figure 6] FIG. 6 is a plan view of a plurality of bus bars of a bus bar assembly according to an embodiment of the present invention. [Figure 7] FIG. 7 is a side view of a plurality of bus bars of a bus bar assembly according to an embodiment of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0019] 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.

[0020] 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.

[0021] 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.

[0022] 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.

[0023] 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.

[0024] 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 are 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. Additionally, 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," unless the context clearly indicates otherwise.

[0025] 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 "axially upper side" or "upper side" or "upper side", and the direction from the opening of the motor housing toward the bottom is referred to as the "other axial side" or "axially lower side" or "lower side" or "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.

[0026] Hereinafter, embodiments of the present invention will be described with reference to the drawings.

[0027] First aspect of the embodiment An embodiment of the present invention provides a motor.

[0028] 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.

[0029] Fig. 1 is a schematic diagram of a partial assembly of a motor according to an embodiment of the present invention, and Fig. 2 is a plan view of a partial assembly of the motor shown in Fig. 1.

[0030] As shown in FIGS. 1 and 2, the motor according to the embodiment of the present invention includes a stator core 11 and a bus bar assembly 20 arranged on one side of the stator core 11 in the axial direction.

[0031] In this embodiment, teeth (not shown) of the stator core 11 are insulated from the coils 12 wound around the teeth (not shown) by insulating members 13. The stator core 11, the coils 12, and the insulating members 13 constitute a stator. FIG. 3 is a schematic diagram of a busbar assembly 20 according to this embodiment. As shown in FIG. 3, in this embodiment, the busbar assembly 20 includes a busbar holder 21 and busbars 22, portions of which are fitted into the busbar holder 21. There are a plurality of busbars 22, i.e., portions of the plurality of busbars 22 are fitted into the busbar holder 21, and other portions of the plurality of busbars 22 are exposed from the busbar holder 21.

[0032] 3, the bus bar 22 includes a claw portion 222 exposed from the bus bar holder 21. The claw portion 222 is formed in a generally ear-like shape when viewed from the axial direction. The claw portion 222 has an opening for fixing the terminal of the coil 12.

[0033] In this embodiment, the bus bar holder 21 has an annular main body portion 211, and as shown in Fig. 2, the annular main body portion 211 faces the insulating member 13 in the radial direction. In other words, the main body portion 211 of the bus bar holder 21 is projected onto the insulating member 13 when viewed along the radial direction.

[0034] As a result, the main body 211 of the bus bar holder 21 is arranged radially opposite the insulating member 13, and the bus bar holder 21 does not occupy any additional dimension in the axial direction, thereby shortening the axial length of the motor and making the motor smaller.

[0035] 2, in accordance with the positioning of the main body 211 of the bus bar holder 21 radially outward from the insulating member 13, the openings of the claws 222 face radially inward. This makes it easy to connect the terminals of the coil 12 to the claws. However, the present application is not limited thereto, and for example, in accordance with the positioning of the main body 211 radially inward from the insulating member 13, the openings of the claws 222 may face radially outward. This allows the axial length of the motor 1 to be further shortened, thereby making the motor 1 more compact.

[0036] FIG. 4 is a schematic diagram of an insulating member 13 according to an embodiment of the present invention.

[0037] In some embodiments, as shown in Fig. 4, the outer peripheral surface of insulating member 13 has a recess 131. As shown in Fig. 3, the inner peripheral surface of main body 211 of busbar holder 21 has a protrusion 214. Protrusion 214 and recess 131 face each other in the radial direction and are fitted into each other. This makes it possible to fix busbar holder 21 in the circumferential direction and prevent the busbar holder from moving in the circumferential direction.

[0038] Fig. 5 is a schematic diagram of a plurality of bus bars 22 of a bus bar assembly according to an embodiment of the present invention. Fig. 6 is a plan view of a plurality of bus bars 22 of a bus bar assembly according to an embodiment of the present invention. Fig. 7 is a side view of a plurality of bus bars 22 of a bus bar assembly according to an embodiment of the present invention.

[0039] 5 to 7, in some embodiments, the busbar portion (called the busbar main body 221) fitted into the busbar holder 21 has a tip-like structure, extends along the circumferential direction, is formed into a substantially arc-like shape when viewed from the axial direction, and has an extended surface parallel to the central axis OO' of the motor. That is, the busbar main body 221 is placed vertically along the axial direction and extends vertically. This makes it possible to reduce the radial thickness of the busbar holder 21, which is advantageous in suppressing the radial dimensions of the motor.

[0040] In some embodiments, as shown in FIG. 3 , the body portion 211 of the busbar holder 21 may completely cover the busbar body portion 221, or may only partially cover the busbar body portion 221, i.e., a portion of the busbar body portion 221 may be fitted into the body portion 211 of the busbar holder 21.

[0041] As a result, the busbar portion fitted into the main body 211 of the busbar holder 21 has a tip-like structure, and the extended surface is parallel to the central axis OO' of the motor. This reduces the radial thickness of the busbar assembly 20, thereby enabling the radial dimension of the motor to be reduced.

[0042] 6, in some embodiments, the axial projection of the portion (busbar main body 221) of each busbar 22 fitted into the main body 211 of the busbar holder 21 is part of a circle having the same radial dimension. In other words, the axial projection of the portion (busbar main body 221) of each busbar 22 fitted into the main body 211 of the busbar holder 21 is located on the same circumference. This makes it possible to further reduce the radial thickness of the busbar assembly 20, thereby reducing the radial dimension of the motor.

[0043] In some embodiments, as shown in Figure 5, the busbar assembly 20 includes three busbars 22. Although labeled 22-1, 22-2, and 22-3 in Figure 5, the present application is not limited thereto and other numbers of busbars 22 may be used as desired.

[0044] In some embodiments, as shown in Fig. 7, the claw portions 222 of the individual bus bars 22-1, 22-2, and 22-3 have the same height in the axial direction. All of them are shown in Fig. 7 at position P. This facilitates the fixing operation of the coil terminals and prevents the main body portion of the bus bar assembly 20 (including the claw portions) from occupying additional space in the axial direction, thereby further reducing the axial dimension of the motor.

[0045] For example, as shown in Figures 5 to 7, the busbar 22 may further include a terminal 223, a first connecting portion 224 connecting the busbar main body 221 and the claw portion 222, and a second connecting portion 225 connecting the busbar main body 221 and the terminal 223.

[0046] In the above example, first connecting portion 224 may extend axially upward from the axial upper surface of busbar main body 221, a tip portion of first connecting portion 224 may be bent radially inward, and the tip portion may be connected to claw portion 222. Second connecting portion 225 may extend radially inward from the axial upper surface of busbar main body 221, a tip portion of second connecting portion 225 may be bent axially upward, and the tip portion may be connected to terminal 223. Terminal 223 may be a chip-shaped structure that extends axially upward in a straight line and is used to connect an external power source.

[0047] For example, as shown in FIG. 3, the bus bar holder 21 may further include a terminal guide portion 212 and a connecting portion 213.

[0048] In the above example, the connecting portion 213 may extend radially inward from the axial upper surface of the main body portion 211 and be used to connect the terminal guide portion 212. The terminal guide portion 212 may extend along the axial direction and have a through hole passing through in the axial direction. The lower portion of the terminal 223 of the busbar 22 is fitted into the through hole, and the upper portion of the terminal 223 extends from the through hole.

[0049] In the above embodiment, only the structure related to the motor of the embodiment of the present application is described, and the motor may further include other structures, such as a rotor, a casing, etc. For details, reference can be made to related art, and the description will be omitted here.

[0050] 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.

[0051] According to the motor of the above embodiment, the main body of the bus bar holder is arranged so as to face the insulating member in the radial direction, and the bus bar holder does not occupy any extra dimension in the axial direction, thereby shortening the axial length of the motor and making the motor smaller.

[0052] 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.

[0053] 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 devices, including, for example, brake components that use a motor.

[0054] 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 contents 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.

[0055] 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.

[0056] 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]

[0057] 1...motor, 11...stator core, 12...coil, 13...insulating member, 20...busbar assembly, 21...busbar holder, 22, 22-1, 22-2, 22-3...busbar, 131...recess, 211...main body, 214...projection, 221...busbar main body (busbar portion), 222...claw portion, OO'...central axis

Claims

1. a stator core; and a bus bar assembly arranged on one side of the stator core in an axial direction, the busbar assembly includes a busbar holder and a busbar having a portion fitted into the busbar holder, the busbar including a claw portion exposed from the busbar holder; A motor in which the teeth of the stator core are insulated from a coil wound around the teeth by an insulating member, the bus bar holder includes an annular body portion, The motor, wherein the main body portion is radially opposed to the insulating member.

2. The motor according to claim 1 , wherein the main body portion of the bus bar holder is located radially outside the insulating member.

3. 3. The motor according to claim 2, wherein the openings of the claws face radially inward.

4. The motor according to claim 2, characterized in that an inner surface of the main body portion of the bus bar holder has a convex portion, and an outer surface of a portion of the insulating member that radially faces the main body portion has a concave portion that fits into the convex portion.

5. 2. The motor according to claim 1, wherein the busbar portion fitted into the body portion of the busbar holder has a tip-like structure with an extended surface parallel to a central axis of the motor.

6. The motor according to claim 1 , wherein the axial projections of the busbar portions fitted into the body portion of the busbar holder are positioned on the same circumference having the same radial dimension.

7. 2. The motor according to claim 1, wherein the number of the bus bars is plural, and the claw portions of the plurality of bus bars have the same height in the axial direction.

8. The motor according to claim 1 , wherein the main body portion of the bus bar holder is located radially inside the insulating member.

9. The motor according to claim 8, wherein the openings of the claws face radially outward.

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

Images