Motor and electrical product

Abstract

The embodiment of the invention provides a motor and an electrical product, and the motor comprises a rotor which is provided with a rotating shaft which rotates with a central axis as the center; a stator facing the rotor in the radial direction; a housing accommodating the rotor and the stator and having an opening at one axial end; an upper-layer bus bar assembly including an upper-layer bus bar holder and an upper-layer bus bar held by the upper-layer bus bar holder, the upper-layer bus bar including an upper-layer bus bar terminal; and a lower-layer bus bar assembly including a lower-layer bus bar holder and a lower-layer bus bar held by the lower-layer bus bar holder, the lower-layer bus bar including a lower-layer bus bar terminal; the upper-layer bus bar holder is mounted on the edge of the opening of the casing, the lower-layer bus bar holder is positioned on the axial lower side of the upper-layer bus bar holder, and the upper-layer bus bar terminal and the lower-layer bus bar terminal are electrically connected inside the casing, so that the mounting position accuracy of the upper-layer bus bar holder can be ensured, and the mounting accuracy of the upper-layer bus bar holder can be improved. And the dustproof and waterproof performance of the motor can be improved.

Description

Technical Field

[0001] The present application relates to the field of electromechanics, and in particular to a motor and an electrical product. Background Art

[0002] A bus bar holder is provided in the brushless motor to supply power to the motor. In order to make the position of the bus bar more accurate, the bus bar holder is configured as an upper bus bar holder and a lower bus bar holder that are separately formed, wherein the upper bus bar held in the upper bus bar holder is electrically connected to the outside, and the motor can be electrically connected to the outside by electrically connecting the terminals of the upper bus bar held in the upper bus bar holder and the terminals of the lower bus bar held in the lower bus bar holder.

[0003] In the prior art, the upper bus bar holder is usually mounted on the motor cover or the lower bus bar holder.

[0004] It should be noted that the above introduction to the technical background is only for the convenience of providing a clear and complete description of the technical solutions of the present application and for the convenience of understanding by those skilled in the art. It cannot be considered that the above technical solutions are well known to those skilled in the art simply because they are described in the background technology section of the present application. Summary of the invention

[0005] The inventors discovered that in the above-mentioned prior art, since the upper busbar retainer is mounted on the motor cover, its position accuracy is affected by the size of the motor cover and the assembly tolerance, and there is a certain deviation; and, the electrical connection position of the upper busbar terminal and the lower busbar terminal is located on the outside of the motor cover, therefore, it is necessary to form a through hole in the motor cover, which has a certain impact on the dustproof and waterproof performance of the motor.

[0006] In response to the problems pointed out in the background technology, an embodiment of the present application provides a motor, in which an upper bus bar holder is mounted on the edge of a motor casing, and there is no assembly tolerance in the position of the casing edge relative to the motor cover and the lower bus bar holder. Thus, the installation position accuracy of the upper bus bar holder can be ensured, and since the electrical connection between the upper bus bar terminal and the lower bus bar terminal is located inside the motor casing, the dust and water proofing performance of the motor can be improved.

[0007] According to one aspect of an embodiment of the present application, a motor is provided, the motor comprising:

[0008] a rotor having a rotation shaft that rotates about a central axis;

[0009] a stator, which is opposite to the rotor in the radial direction;

[0010] a casing, which accommodates the rotor and the stator and has an opening at one axial end;

[0011] an upper bus bar assembly, comprising an upper bus bar holder and an upper bus bar held by the upper bus bar holder, the upper bus bar comprising an upper bus bar terminal; and

[0012] A lower bus bar assembly, comprising a lower bus bar holder and a lower bus bar held by the lower bus bar holder, wherein the lower bus bar comprises a lower bus bar terminal;

[0013] in,

[0014] The upper bus bar holder is mounted on the edge of the opening of the housing.

[0015] The lower bus bar holder is located axially below the upper bus bar holder.

[0016] The upper bus bar terminal and the lower bus bar terminal are electrically connected inside the housing.

[0017] According to a second aspect of the embodiment of the present application, the motor further comprises an induction magnetic ring, which is arranged radially inward of the upper bus bar holder and closer to the axial lower side relative to the upper surface of the upper bus bar holder.

[0018] According to a third aspect of the embodiment of the present application, the motor further includes an induction magnetic ring, which is arranged axially above a position where the upper bus bar terminal is electrically connected to the lower bus bar terminal.

[0019] According to a fourth aspect of the embodiment of the present application, the upper bus bar holder further comprises a mounting portion, the mounting portion is arranged on the inner periphery of the upper bus bar holder and is located radially outward of the rotor, and the mounting portion is integrally formed with the upper bus bar holder;

[0020] The mounting portion is located axially below a position where the upper bus bar terminal and the lower bus bar terminal are electrically connected, and is opposed to the position where the upper bus bar terminal and the lower bus bar terminal are electrically connected in a circumferential direction.

[0021] According to a fifth aspect of the embodiment of the present application, the motor further includes a circuit board, which is mounted on the mounting portion and located radially outside the rotor;

[0022] The circuit board and the electrical connection position are at the same height in the axial direction and are opposite to the electrical connection position in the circumferential direction.

[0023] According to a sixth aspect of the embodiment of the present application, the mounting portion is formed into at least a partial ring shape, and its inner diameter is greater than or equal to the inner diameter of the core of the stator;

[0024] The circuit board is formed into at least a partial ring shape, and an inner diameter of the circuit board is greater than or equal to an inner diameter of the mounting portion.

[0025] According to a seventh aspect of the embodiment of the present application, the motor further comprises a plurality of signal wires integrally formed on the upper bus bar holder, one end of the plurality of signal wires being connected to the circuit board;

[0026] Parts of the plurality of signal lines extending on a plane perpendicular to the axial direction are located in the same plane.

[0027] According to an eighth aspect of the embodiment of the present application, portions of the multiple signal lines extending on a plane perpendicular to the axial direction are closer to the radial outside relative to the circuit board and closer to the radial inside relative to the radial outer periphery of the edge of the casing.

[0028] According to a ninth aspect of the embodiment of the present application, at least a portion of the plurality of signal lines overlaps with the edge of the housing in the axial direction.

[0029] According to a tenth aspect of an embodiment of the present application, there is provided an electrical product, comprising the motor described in any one of the first to ninth aspects above.

[0030] One of the beneficial effects of the embodiments of the present application is that by mounting an upper bus bar retainer on the edge of a motor casing, the upper bus bar retainer installed in the motor casing is axially positioned by relying on the edge of the casing, and there is no assembly tolerance when the upper bus bar retainer is pressed into the casing. Thus, the installation position accuracy of the upper bus bar retainer can be ensured, and because the electrical connection between the upper bus bar terminal and the lower bus bar terminal is located inside the motor casing, the dust and water resistance of the motor can be improved.

[0031] With reference to the following description and accompanying drawings, the specific embodiments of the present application are disclosed in detail, indicating the way in which the principles of the present application can be adopted. It should be understood that the embodiments of the present application are not limited in scope. Within the scope of the terms of the appended claims, the embodiments of the present application include many changes, modifications and equivalents.

[0032] Features described and / or illustrated with respect to one embodiment may be used in the same or similar manner in one or more other embodiments, combined with features in other embodiments, or substituted for features in other embodiments.

[0033] It should be emphasized that the term “include / comprises” when used herein refers to the presence of features, integers, steps or components, but does not exclude the presence or addition of one or more other features, integers, steps or components. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] The elements and features described in one figure or one implementation of the present application embodiment may be combined with the elements and features shown in one or more other figures or implementations. In addition, in the accompanying drawings, similar reference numerals represent corresponding parts in several figures and can be used to indicate corresponding parts used in more than one implementation.

[0035] The included drawings are used to provide a further understanding of the embodiments of the present application, which constitute a part of the specification, are used to illustrate the implementation methods of the present application, and together with the text description, explain the principles of the present application. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. In the drawings:

[0036] Figure 1 is a schematic diagram of an axial cross section of a motor according to an embodiment of the present application;

[0037] Figure 2 yes Figure 1 a top view of the motor shown;

[0038] Figure 3 yes Figure 1 another top view of the motor shown;

[0039] Figure 4 yes Figure 1 The motor shown includes a top view of a circuit board;

[0040] Figure 5 yes Figure 1 A top view of the upper bus bar holder of the motor shown in FIG. 1 with the resin forming member removed. DETAILED DESCRIPTION

[0041] The foregoing and other features of the present application will become apparent through the following description with reference to the accompanying drawings. In the description and the accompanying drawings, specific embodiments of the present application are specifically disclosed, which show some embodiments in which the principles of the present application can be adopted. It should be understood that the present application is not limited to the described embodiments. On the contrary, the present application includes all modifications, variations and equivalents falling within the scope of the attached claims. Various embodiments of the present application are described below in conjunction with the accompanying drawings. These embodiments are exemplary only and are not limitations of the present application.

[0042] In the embodiments of the present application, the terms "first", "second", "upper", "lower", etc. are used to distinguish different elements in terms of title, but do not indicate the spatial arrangement or time order of these elements, etc., and these elements should not be limited by these terms. The term "and / or" includes any one and all combinations of one or more of the associated listed terms. The terms "comprising", "including", "having", etc. refer to the presence of the stated features, elements, components or components, but do not exclude the presence or addition of one or more other features, elements, components or components.

[0043] In the embodiments of the present application, the singular forms "a", "the", etc. include plural forms and should be broadly understood as "a kind" or "a type" rather than being limited to the meaning of "one"; in addition, the term "said" should be understood to include both singular and plural forms, unless the context clearly indicates otherwise. In addition, the term "according to" should be understood as "at least in part according to...", and the term "based on" should be understood as "at least in part based on...", unless the context clearly indicates otherwise.

[0044] In addition, in the following description of the embodiments of the present application, for the convenience of description, the direction extending along the central axis of the motor or the direction parallel to it is referred to as "axial", the radial direction centered on the central axis is referred to as "radial", the direction around the central axis is referred to as "circumferential", the side away from the central axis along the radial direction is referred to as "radial outer side", the side close to the central axis along the radial direction is referred to as "radial inner side", the direction from the bottom of the motor housing to the opening is referred to as "above", "axially above", "upper side" or "axial upper side", and the direction from the opening of the motor housing to the bottom of the motor housing is referred to as "below", "axially below", "lower side" or "axial lower side". However, it is worth noting that these are only for the convenience of description and do not limit the orientation of the motor during use and manufacturing.

[0045] The embodiments of the present application are described below with reference to the accompanying drawings.

[0046] Embodiments of the first aspect

[0047] The present application embodiment provides a motor 100, Figure 1 is a schematic diagram of an axial cross section of the motor 100 according to an embodiment of the present application; Figure 1 As shown, the motor 100 provided in the embodiment of the present application comprises: a rotor 1, a stator 2 radially opposite to the rotor 1, and a casing 3 accommodating the rotor 1 and the stator 2, wherein the rotor 1 has a rotating shaft and the rotor 1 can rotate around the central axis X of the rotating shaft; the casing 3 has an opening at one axial end.

[0048] The motor 100 also has an upper bus bar assembly 10 and a lower bus bar assembly 20. The upper bus bar assembly 10 includes an upper bus bar holder and an upper bus bar held by the upper bus bar holder, the upper bus bar including an upper bus bar terminal; the lower bus bar assembly includes a lower bus bar holder and a lower bus bar held by the lower bus bar holder, the lower bus bar including a lower bus bar terminal.

[0049] Figure 2 yes Figure 1 A top view of the motor 100 is shown; Figure 1 and Figure 2 As shown, the upper bus bar assembly 10 includes an upper bus bar holder 11 and an upper bus bar 12 held by the upper bus bar holder 11. The upper bus bar holder 11 is mounted on the edge of the housing 3, and the upper bus bar terminal A is located inside the housing 3. Figure 1 and Figure 2 As shown, the casing 3 of the motor 100 in the embodiment of the present application has a flange structure extending radially outward at the opening, and the upper bus bar retainer 11 can cooperate with the shape of the flange structure of the casing 3 and be mounted on the flange structure of the casing 3. The edge of the casing 3 refers to the flange structure.

[0050] However, the flange structure is only an example provided in the embodiment of the present application, and the housing 3 may not have the flange structure, but only have an axially extending portion. In this example, the upper bus bar holder 11 is mounted on the upper edge of the axially extending portion, and at this time, the edge of the housing 3 refers to the upper edge of the circumferentially extending portion. The present application does not limit this.

[0051] like Figure 1 and Figure 2 As shown, the lower bus bar assembly 20 includes a lower bus bar holder 21 and a lower bus bar 22 held in the lower bus bar holder 21. The lower bus bar holder 21 is arranged inside the housing 3 and is arranged axially below the upper bus bar holder 11. The lower bus bar terminal B is electrically connected to the terminal of the upper bus bar 12 inside the housing 3.

[0052] Figure 3 yes Figure 1 Another top view of the motor 100 is shown in FIG. Figure 2 and Figure 3 As shown, the terminals of the upper busbar 12 and the terminals of the lower busbar 22 can be electrically connected at an electrical connection position 30, and the electrical connection position 30 is located inside the housing 3. In the motor 100 provided in the embodiment of the present application, the upper and lower busbar terminals can have multiple electrical connection positions 30, and the present application does not limit the number and specific positions of the electrical connection positions 30.

[0053] With the motor 100 provided by the above-mentioned embodiment of the present application, an upper bus bar holder 11 is mounted at the edge of the motor casing 3, and the upper bus bar holder 11 installed in the motor casing 3 is axially positioned by relying on the edge of the casing 3. There is no assembly tolerance when the upper bus bar holder 11 is pressed into the casing 3, thereby ensuring the installation position accuracy of the upper bus bar holder 11. Moreover, since the electrical connection position 30 between the terminal of the upper bus bar 12 and the terminal of the lower bus bar 22 is located inside the motor casing 3, there is no need to reserve an opening in the motor cover, thereby improving the dustproof and waterproof performance of the motor.

[0054] In some embodiments, Figure 1 As shown, the motor 100 further includes an induction magnetic ring 4, which is arranged radially inward of the upper bus bar holder 11, and the upper surface of the induction magnetic ring 4 is closer to the axial lower side than the upper surface of the upper bus bar holder 11; Figure 1 As shown, the upper surface of the upper bus bar holder 11 refers to the axial upper surface of the upper bus bar holder 11 mounted on the flange of the housing 3 and extending radially. Thus, the induction magnetic ring 4 can be arranged inside the housing, thereby reducing the axial size of the motor 100.

[0055] In some embodiments, Figure 1 As shown, the induction magnetic ring 4 is arranged on the axial upper side of the electrical connection position 30 of the upper and lower bus bar terminals, thereby facilitating the connection between the terminals of the upper bus bar 12 and the lower bus bar 22 inside the motor housing 3. Therefore, there is no need to reserve an opening in the motor cover, and the dust and water resistance of the motor can be improved through a simple assembly process.

[0056] In the above embodiment, the induction magnetic ring 4 can be arranged inside the housing 3 of the motor 100 by interference fit with the rotating shaft, or the induction magnetic ring 4 can be arranged in the motor 100 with reference to relevant technologies in the field, and the present application does not impose any restrictions on this.

[0057] In some embodiments, Figure 3 As shown, the upper bus bar holder 11 also has a mounting portion 13 for mounting a circuit board. The mounting portion 13 is arranged on the inner periphery of the upper bus bar holder 11 and is located radially outside the rotor 1 , and the mounting portion 13 can be integrally formed with the upper bus bar holder 11 .

[0058] In the above embodiment, if Figure 3As shown, the mounting portion 13 is axially lower than the electrical connection position 30 of the upper bus bar terminal A and the lower bus bar terminal B, and is circumferentially opposite to the electrical connection position 30, that is, the axial position of the mounting portion 13 is lower than the electrical connection position 30, and the circumferential position of the mounting portion 13 does not overlap with the electrical connection position 30. With this structure, the axial dimension of the motor can be reduced.

[0059] Figure 4 yes Figure 1 Another top view of the motor 100 is shown; Figure 1 and Figure 4 As shown, in the embodiment of the present application, the motor 100 further includes a circuit board 5. In some embodiments, the circuit board 5 is mounted on the mounting portion 13 and is located radially outside the rotor 1. In the above embodiment, the circuit board 5 is at the same height as the electrical connection position 30 in the axial direction and is circumferentially opposite to the electrical connection position 30. This structure facilitates the assembly of the circuit board and can reduce the axial size of the motor.

[0060] In some embodiments, Figure 3 As shown, the mounting portion 13 is formed into a partial ring shape, which extends radially toward the inside of the housing 3 along the inner circumference of the upper busbar holder 11, and the inner diameter of the partial ring shape of the mounting portion 13 is greater than or equal to the inner diameter of the core of the stator 2; in addition, as shown Figure 4 As shown, the circuit board 5 is also formed in a partial ring shape, and the inner diameter of the circuit board 5 is greater than or equal to the inner diameter of the mounting portion 13 , thereby preventing the circuit board 5 from interfering with the assembly of the rotor 1 and the stator 2 .

[0061] In the above embodiment, the height of the circuit board 5 in the axial direction is the same as the height of the electrical connection position 30 in the axial direction, thereby further reducing the size of the motor 100 in the axial direction.

[0062] Figure 5 yes Figure 1 The top view of the upper bus bar holder of the motor 100 after removing the resin forming member is shown in FIG. Figure 5 As shown, in some embodiments, the motor 100 further has a plurality of signal wires 6, which are integrally formed with the upper bus bar holder 11, and one end of the plurality of signal wires 6 is connected to the circuit board 5, and the other end extends along the housing 3 to the outside of the motor 100. Figure 5 As shown, the multiple signal lines 6 have portions extending along a plane perpendicular to the axial direction, wherein the portions of the multiple signal lines 6 extending along a plane perpendicular to the axial direction are located in the same plane. Thus, the axial heights of the multiple signal lines 6 can be kept consistent, thereby further reducing the axial height of the upper busbar retainer 11, and further reducing the axial size of the motor 100.

[0063] In the above embodiment, the specific number of the plurality of signal lines 6 can be specifically set according to the structure and needs of the motor 100 , and the present application does not impose any limitation thereto.

[0064] In addition, in the above embodiment, the portion of the plurality of signal lines 6 extending in the plane perpendicular to the axial direction may be closer to the radial outside than the circuit board 5 and closer to the radial inside than the radial outer periphery of the edge of the housing 3. In other words, Figure 5 As shown, the portions of the multiple signal lines 6 extending on a plane perpendicular to the axial direction are located between the outer periphery of the partially annular circuit board 5 and the outermost periphery of the flange structure at the edge of the housing 3. Thus, the radial inner space of the circuit board is not occupied, which facilitates the assembly of the motor.

[0065] In some embodiments, at least a portion of the multiple signal lines 6 can overlap with the edge of the casing 3 in the axial direction, thereby further fully utilizing the radial space of the flange structure of the edge of the casing 3, while also preventing the multiple signal lines 6 from affecting the configuration of components in the internal space of the motor 100.

[0066] It is worth noting that the above only exemplifies the composition and structure of the motor related to the present application, but the present application is not limited thereto, and appropriate modifications can be made based on the above embodiments. In addition, the above only exemplifies the various components, but the present application is not limited thereto, and the specific contents of each component can also refer to the relevant technology; the motor can also include other components, such as end covers, bearings, etc., which can be specifically referred to the relevant technology, and the description is omitted here.

[0067] As can be seen from the above embodiments, by mounting the upper bus bar holder on the edge of the motor housing, there is no assembly tolerance between the position of the housing edge and the motor cover and the lower bus bar holder, thereby ensuring the installation position accuracy of the upper bus bar holder, and since the electrical connection position of the upper bus bar and the lower bus bar terminal is located inside the motor housing, the dustproof and waterproof performance of the motor can be improved. In addition, since the electrical connection positions of the upper and lower bus bar terminals are both located inside the motor, the axial size of the motor can also be reduced.

[0068] Embodiments of the second aspect

[0069] The embodiment of the present application provides an electrical product having the motor 100 described in the embodiment of the first aspect.

[0070] Since the structure of the motor 100 has been described in detail in the embodiment of the first aspect, the content thereof is incorporated herein and the description thereof is omitted here.

[0071] In the implementation of the present application, the electrical product may be any electrical device provided with a motor, for example, a brake motor, etc.

[0072] The present application is described above in conjunction with specific implementation methods, but it should be clear to those skilled in the art that these descriptions are exemplary and are not intended to limit the scope of protection of the present application. Those skilled in the art can make various modifications and variations to the present application based on the spirit and principles of the present application, and these modifications and variations are also within the scope of the present application.

[0073] The preferred embodiments of the present application are described above with reference to the accompanying drawings. Many features and advantages of these embodiments are clear from this detailed description, and therefore the appended claims are intended to cover all such features and advantages of these embodiments that fall within their true spirit and scope. In addition, since many modifications and changes are easily conceivable to those skilled in the art, the embodiments of the present application are not intended to be limited to the precise structures and operations illustrated and described, but all suitable modifications and equivalents that fall within their scope may be covered.

Claims

1. A motor, comprising: a rotor having a rotation shaft that rotates about a central axis; a stator, which is opposite to the rotor in the radial direction; a casing, which accommodates the rotor and the stator and has an opening at one axial end; An upper bus bar assembly, comprising an upper bus bar holder and an upper bus bar held by the upper bus bar holder, wherein the upper bus bar comprises an upper bus bar terminal; as well as A lower bus bar assembly, comprising a lower bus bar holder and a lower bus bar held by the lower bus bar holder, wherein the lower bus bar comprises a lower bus bar terminal; It is characterized in that The upper bus bar holder is mounted on the edge of the opening of the housing. The lower bus bar holder is located axially below the upper bus bar holder. The upper bus bar terminal and the lower bus bar terminal are electrically connected inside the housing.

2. The motor according to claim 1, characterized in that The motor further includes an induction magnetic ring, which is disposed radially inward of the upper bus bar holder and closer to an axially lower side than an upper surface of the upper bus bar holder.

3. The motor according to claim 1, characterized in that The motor further includes an induction magnetic ring disposed axially above a position where the upper bus bar terminal and the lower bus bar terminal are electrically connected.

4. The motor according to claim 1, characterized in that The upper bus bar holder further comprises a mounting portion, the mounting portion is arranged on the inner periphery of the upper bus bar holder and is located radially outward of the rotor, and the mounting portion is integrally formed with the upper bus bar holder; The mounting portion is located axially below a position at which the upper bus bar terminal and the lower bus bar terminal are electrically connected, and is opposed to the position at which the upper bus bar terminal and the lower bus bar terminal are electrically connected in a circumferential direction.

5. The motor according to claim 4, characterized in that The motor further includes a circuit board, which is mounted on the mounting portion and located radially outside the rotor; The circuit board and the electrical connection position are at the same height in the axial direction and are opposite to the electrical connection position in the circumferential direction.

6. The motor according to claim 5, characterized in that The mounting portion is formed into at least a partial ring shape, and its inner diameter is greater than or equal to the inner diameter of the core of the stator; The circuit board is formed into at least a partial ring shape, and an inner diameter of the circuit board is greater than or equal to an inner diameter of the mounting portion.

7. The motor according to claim 1, characterized in that The motor further comprises a plurality of signal wires integrally formed on the upper bus bar holder, one end of the plurality of signal wires being connected to the circuit board; Parts of the plurality of signal lines extending on a plane perpendicular to the axial direction are located in the same plane.

8. The motor according to claim 7, characterized in that Portions of the plurality of signal lines extending on a plane perpendicular to the axial direction are closer to the radial outside than the circuit board, and closer to the radial inside than the radial outer periphery of the edge of the housing.

9. The motor according to claim 7, characterized in that At least a portion of the plurality of signal lines overlaps with the edge of the housing in an axial direction.

10. An electrical product, characterized in that: The electrical product comprises the motor according to any one of claims 1 to 9.

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