Motor and electric product

Abstract

To provide a motor capable of improving a dust-proof and waterproof performance of the motor.SOLUTION: A motor contains: a rotator 1 that includes a rotational shaft rotated with a center shaft as a center; a stator 2 that is opposite to the rotator in a radial direction; a housing 3 that houses the rotator and the stator, and includes an open part at one end in a shaft direction; an upper layer bus bar holder; and an upper layer bus bar that is held by the upper layer bus bar holder. The upper layer bus bar contains: an upper layer bus bar assembly 10 containing an upper layer bus bar terminal; a lower layer bus bar holder; and a lower layer bus bar that is held by the lower layer bus bar holder. The lower layer bus bar comprises a lower layer bus bar assembly 20 containing a lower layer bus bar terminal. The upper layer bus bar holder is mounted onto an edge of the open part of the housing, and the lower layer bus bar holder is positioned on a lower side in the shaft direction of the upper layer bus bar holder. The upper layer bus bar terminal is electrically connected in an internal part of the housing to the lower layer bus bar terminal.SELECTED DRAWING: Figure 1

Description

[Technical field]

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

[0002] A busbar holder is disposed in the brushless motor to supply power to the motor. In order to position the busbars more accurately, the busbar holder is disposed as an upper layer busbar holder and a lower layer busbar holder which are separately molded. Of these, the upper layer busbar held by the upper layer busbar holder is electrically connected to the outside, and the terminals of the upper layer busbar held by the upper layer busbar holder and the terminals of the lower layer busbar held by the lower layer busbar holder are electrically connected to each other, thereby realizing an electrical connection between the motor and the outside.

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

[0004] 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 methods of the present application and to facilitate the understanding of those skilled in the art, and the above technical methods should not be deemed to be publicly known to those skilled in the art merely because they are described in the background section of the present application. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] China Patent Application Publication No. 115694030 Summary of the Invention [Problem to be solved by the invention]

[0006] The inventor has discovered that in the above-mentioned conventional technology, since the upper layer bus bar holder is mounted on the motor cover portion, its positional accuracy is affected by the dimensions and assembly tolerances of the motor cover portion, and there is a certain degree of variation. Moreover, since the electrical connection position between the upper layer bus bar terminal and the lower layer bus bar terminal is located outside the motor cover portion, when it is necessary to form a through hole in the motor cover portion, this has a certain impact on the dustproof and waterproof performance of the motor.

[0007] In response to the problems pointed out in the background art, in an embodiment of the present application, by mounting an upper layer bus bar holder on the edge of the housing, there is no assembly tolerance between the position of the housing edge and the motor cover and the lower layer bus bar holder. This ensures the mounting position accuracy of the upper layer bus bar holder, and since the electrical connection position between the upper layer bus bar terminals and the lower layer bus bar terminals is located inside the housing, a motor is provided that can improve the dustproof and waterproof performance of the motor. [Means for solving the problem]

[0008] According to a first aspect of an embodiment of the present application, there is provided a motor comprising: a rotor having a rotating shaft rotating about a central axis; a stator radially opposite the rotor; a housing that accommodates the rotor and the stator and has an opening at one axial end; an upper layer busbar holder and an upper layer busbar held in the upper layer busbar holder, the upper layer busbar including an upper layer busbar assembly including an upper layer busbar terminal; a lower layer busbar holder and a lower layer busbar held in the lower layer busbar holder, the lower layer busbar including a lower layer busbar terminal; the upper layer busbar holder is mounted on an edge of the opening of the housing, the lower layer busbar holder is located axially below the upper layer busbar holder, and the upper layer busbar terminal is electrically connected to the lower layer busbar terminal inside the housing.

[0009] According to a second aspect of the present embodiment, the motor further includes a sensor magnet, which is arranged radially inward of the upper layer busbar holder and is closer to the axially lower side than the upper surface of the upper layer busbar holder.

[0010] According to a third aspect of the present embodiment, the motor further includes a sensor magnet, the sensor magnet being arranged axially above a position of electrical connection between the upper layer bus bar terminal and the lower layer bus bar terminal.

[0011] According to a fourth aspect of the present embodiment, the upper layer busbar holder further has a mounting portion, which is arranged on the inner circumference of the upper layer busbar holder and is located radially outward of the rotor, the mounting portion is integrally molded with the upper layer busbar holder, and the mounting portion is closer axially downward than the position of electrical connection between the upper layer busbar terminal and the lower layer busbar terminal and faces the position of electrical connection in the circumferential direction.

[0012] According to a fifth aspect of the present embodiment, the motor further includes a circuit board, the circuit board being mounted on the mounting portion and positioned radially outside the rotor, the circuit board being at the same height in the axial direction as the position of the electrical connection and facing the position of the electrical connection in the circumferential direction.

[0013] According to a sixth aspect of the present embodiment, at least a portion of the mounting portion is formed in a ring shape, and the inner diameter of the mounting portion is equal to or larger than the inner diameter of the stator core, and at least a portion of the circuit board is formed in a ring shape, and the inner diameter of the mounting portion is equal to or larger than the inner diameter of the mounting portion.

[0014] According to a seventh aspect of the present embodiment, the motor further includes a plurality of signal wires integrally molded with the upper bus bar holder, one ends of the plurality of signal wires are connected to a circuit board, and portions of the plurality of signal wires extending on a plane perpendicular to the axial direction are located in the same plane.

[0015] According to an eighth aspect of the present embodiment, the portions of the multiple signal wires extending on a plane perpendicular to the axial direction are closer to the radially outer side than the circuit board, and closer to the radially inner side than the radial outer periphery of the edge of the housing.

[0016] According to a ninth aspect of the present embodiment, at least a portion of the plurality of signal lines overlaps with the edge of the housing in the axial direction.

[0017] According to a tenth aspect of the present invention, there is provided an electrical product, the electrical product including a motor according to any one of the first to ninth aspects. Effect of the Invention

[0018] One of the beneficial effects of the present embodiment is as follows: by mounting the upper layer bus bar holder on the edge of the housing and using the edge of the housing to position it axially relative to the upper layer bus bar holder inserted into the housing, there is no assembly tolerance when the upper layer bus bar holder is pressed into the housing, thereby ensuring the installation position accuracy of the upper layer bus bar holder and improving the dustproof and waterproof performance of the motor since the electrical connection position between the upper layer bus bar terminals and the lower layer bus bar terminals is located inside the housing. [Brief description of the drawings]

[0019] [Figure 1] FIG. 1 is a schematic diagram of a cross section taken along one axial direction of an extension axis of a motor according to an embodiment of the present invention. [Diagram 2] FIG. 2 is a plan view of the motor shown in FIG. [Diagram 3] FIG. 3 is another plan view of the motor shown in FIG. [Figure 4] FIG. 4 is a plan view of the motor shown in FIG. 1 including a circuit board. [Diagram 5] FIG. 5 is a plan view of the motor shown in FIG. 1 with the resin forming body removed from the upper bus bar holder. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0020] With reference to the following description and drawings, specific embodiments of the present application are disclosed in detail, demonstrating the manner in which the principles of the present application may be employed. It is to be understood that the embodiments of the present application are not limited thereto in scope. Within the terms of the appended claims, the embodiments of the present application include many changes, modifications and equivalents.

[0021] 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.

[0022] It must be emphasized that the term "comprising" as used in this specification refers to the presence of features, components, steps or assemblies, but does not exclude the presence or addition of one or more other features, components, steps or assemblies.

[0023] Elements and features described in one drawing or one embodiment of the present application may be combined with elements and features shown in one or more other drawings or embodiments, and in the drawings, like reference numerals represent corresponding parts in the several drawings and may be used to refer to corresponding parts used in more than one embodiment.

[0024] The included drawings are used to provide further understanding of the embodiments of the present application, constitute a part of the specification, are used to illustrate the embodiments of the present application, and together with the written description, explain the principles of the present application. 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.

[0025] The above and other features of the present application will become apparent from the following description with reference to the drawings. In the description and drawings, certain embodiments of the present application are specifically disclosed, which clearly show that some embodiments of the principles of the present application may be adopted therein, but it should 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. Various embodiments of the present application will be described below in conjunction with the drawings. These embodiments are merely exemplary and are not limitations on the present application.

[0026] In the embodiments of the present application, the terms "first", "second", "upper", "lower", etc. are used to distinguish different elements in terms of designation, but do not indicate the spatial arrangement or temporal order of these elements, and these elements should not be limited to these terms. The term "and / or" includes any and all combinations of one or more of the associated listed terms. The terms "including", "comprising", "having", etc. refer to the presence of stated features, elements, parts or assemblies, but do not exclude the presence or addition of one or more other features, elements, parts or assemblies.

[0027] In the embodiments of the present application, the singular forms "a," "the," and the like are to be understood broadly to include the plural, such as "one kind," or "one type," and are not limited to the meaning of "one," and the term "said" is to be understood to include both the singular and the plural, unless the context clearly indicates otherwise. Additionally, the term "based on" is to be understood to mean "based at least in part on," and the term "based on" is to be understood to mean "based at least in part on," unless the context clearly indicates otherwise.

[0028] In the following description of the embodiments of the present application, for convenience of explanation, the direction extending along the central axis of the motor or the direction parallel thereto is referred to as the "axial direction", the radial direction around the central axis is referred to as the "radial direction", the direction going around the central axis is referred to as the "circumferential direction", the side away from the central axis along the radial direction is referred to as the "radial outer side", the side closer to the central axis along the radial direction is referred to as the "radial inner side", the direction from the bottom of the housing toward the opening is referred to as the "upper", "axially upper", "upper side" or "axially upper side", and the direction from the opening of the housing toward the bottom of the housing is referred to as the "lower", "axially lower", "lower side" or "axially lower side". However, it should be noted that this is for convenience of explanation and does not limit the orientation of the motor during use or manufacture.

[0029] Hereinafter, embodiments of the present invention will be described with reference to the drawings.

[0030] Example of the first aspect In the present embodiment, a motor 100 is provided, and Fig. 1 is a schematic diagram of a cross section along one axial direction of the motor 100 of the present embodiment. As shown in Fig. 1, the motor 100 provided in the present embodiment has a rotor 1, a stator 2 radially opposed to the rotor 1, and a housing 3 accommodating the rotor 1 and the stator 2, of which the rotor 1 has a rotating shaft and is rotatable around a central axis line X of the rotating shaft. The housing 3 has an opening at one end in the axial direction.

[0031] The motor 100 further includes an upper layer busbar assembly 10 and a lower layer busbar assembly 20. The upper layer busbar assembly 10 includes an upper layer busbar holder and an upper layer busbar held by the upper layer busbar holder, the upper layer busbar including an upper layer busbar terminal. The lower layer busbar assembly includes a lower layer busbar holder and a lower layer busbar held by the lower layer busbar holder, the lower layer busbar including a lower layer busbar terminal.

[0032] Fig. 2 is a plan view of one of the motors 100 shown in Fig. 1. As shown in Fig. 1 and Fig. 2, the upper layer busbar assembly 10 includes an upper layer busbar holder 11 and an upper layer busbar 12 held by the upper layer busbar holder 11, the upper layer busbar holder 11 is mounted on an edge of the housing 3, and the upper layer busbar terminal A is located inside the housing 3. As shown in Fig. 1 and Fig. 2, the housing 3 of the motor 100 in the embodiment of the present application has a flange structure extending radially outward at the opening portion, and the upper layer busbar holder 11 matches the shape of the flange structure of the housing 3 so as to be mountable on the flange structure of the housing 3, and the edge of the housing 3 refers to the flange structure.

[0033] However, the flange structure is merely one example provided in the embodiment of the present application, and the housing 3 may have only an axially extending portion without the flange structure, and in this example, when the upper bus bar holder 11 is mounted on the upper edge of the axially extending portion, the edge of the housing 3 is the upper edge of the circumferentially extending portion. The present application is not limited thereto.

[0034] As shown in Figures 1 and 2, the lower layer busbar assembly 20 includes a lower layer busbar holder 21 and a lower layer busbar 22 held by the lower layer busbar holder 21, the lower layer busbar holder 21 being positioned inside the housing 3 and axially below the upper layer busbar holder 11, and the lower layer busbar terminal B being electrically connected to the terminal of the upper layer busbar 12 inside the housing 3.

[0035] 2 and 3, the terminals of the upper bus bar 12 and the terminals of the lower bus bar 22 can be electrically connected at electrical connection positions 30, and the electrical connection positions 30 are located inside the housing 3. In the motor 100 provided in the embodiment of the present application, the upper and lower bus bar terminals can have a plurality of electrical connection positions 30, but the present application does not limit the number and specific positions of the electrical connection positions 30.

[0036] In the motor 100 provided in the above embodiment of the present application, the upper layer bus bar holder 11 is mounted on the edge of the housing 3 and axially positioned relative to the upper layer bus bar holder 11 inserted into the housing 3 by the edge of the housing 3, eliminating assembly tolerances when the upper layer bus bar holder 11 is pressed into the inside of the housing 3. This ensures the accuracy of the mounting position of the upper layer bus bar holder 11, and since the electrical connection position 30 between the terminal of the upper layer bus bar 12 and the terminal of the lower layer bus bar 22 is located inside the housing 3, there is no need to previously secure an opening in the motor cover portion, thereby improving the dustproof and waterproof performance of the motor.

[0037] In some embodiments, as shown in Fig. 1, the motor 100 further includes a sensor magnet 4, the sensor magnet 4 is disposed radially inside the upper layer bus bar holder 11, and the upper surface of the sensor magnet 4 is closer to the axially lower side of the upper surface of the upper layer bus bar holder 11. Among these, as shown in Fig. 1, the upper surface of the upper layer bus bar holder 11 refers to the axial upper surface extending along the radial direction in which the upper layer bus bar holder 11 is mounted on the flange of the housing 3. As a result, the sensor magnet 4 is also disposed inside the housing, and the axial dimension of the motor 100 can be reduced.

[0038] In some embodiments, as shown in FIG. 1, the sensor magnet 4 is positioned axially above the electrical connection position 30 of the upper and lower layer bus bar terminals, making it easier to connect the upper layer bus bar 12 to the terminal of the lower layer bus bar 22 inside the housing 3, eliminating the need to secure an opening in the motor cover in advance, and ultimately improving the dustproof and waterproof performance of the motor through a simple assembly process.

[0039] In the above embodiment, the sensor magnet 4 is installed inside the housing 3 of the motor 100 in a tight fit with the rotating shaft, or the sensor magnet 4 may be installed in the motor 100 by referring to the related art in this field, and the present application is not limited thereto.

[0040] In some embodiments, as shown in FIG. 3, the upper layer busbar holder 11 further has a mounting portion 13 for mounting a circuit board, the mounting portion 13 being arranged on the inner circumference of the upper layer busbar holder 11 and positioned radially outside the rotor 1, and the mounting portion 13 can be integrally molded with the upper layer busbar holder 11.

[0041] 3, in the above embodiment, the mounting portion 13 is located axially lower and closer to the electrical connection position 30 between the upper layer bus bar terminal A and the lower layer bus bar terminal B, and faces the electrical connection position 30 in the circumferential direction, that is, the mounting portion 13 is lower in the axial direction than the electrical connection position 30, and the mounting portion 13 does not overlap with the electrical connection position 30 in the circumferential direction. This structure makes it possible to reduce the axial dimension of the motor.

[0042] Fig. 4 is another plan view of the motor 100 shown in Fig. 1. As shown in Fig. 1 and Fig. 4, in the embodiments of the present application, the motor 100 further includes a circuit board 5, and in some embodiments, the circuit board 5 is mounted on the mounting portion 13 and located radially outward of the rotor 1, and in the above embodiments, the circuit board 5 is at the same height as the electrical connection position 30 in the axial direction and faces the electrical connection position 30 in the circumferential direction. This structure makes it easier to assemble the circuit board and can reduce the axial dimension of the motor.

[0043] 3, the mounting portion 13 is formed in a partial ring shape extending radially inside the housing 3 along the inner circumferential surface of the upper bus bar holder 11, and the inner diameter of the partial ring shape of the mounting portion 13 is equal to or larger than the inner diameter of the core of the stator 2. Also, as shown in FIG. 4, the circuit board 5 is also formed in a partial ring shape, and the inner diameter of the circuit board 5 is equal to or larger than the inner diameter of the mounting portion 13, so that the circuit board 5 does not interfere with the assembly of the rotor 1 and the stator 2.

[0044] In the above embodiment, the axial height of the circuit board 5 is the same as the axial height of the electrical connection positions 30, which allows the axial dimension of the motor 100 to be further reduced.

[0045] Fig. 5 is a plan view of motor 100 shown in Fig. 1 after removing the resin formed body from the upper bus bar holder, and as shown in Fig. 5, in some embodiments, motor 100 further has a plurality of signal wires 6, which are integrally molded with upper bus bar holder 11, and one end of each of the signal wires 6 is connected to circuit board 5, and the other end extends along housing 3 toward the outside of motor 100. As shown in Fig. 5, each of the signal wires 6 has a portion extending on a plane perpendicular to the axial direction, and among these, the portions of the signal wires 6 extending on a plane perpendicular to the axial direction are located on the same plane, which ensures that the axial heights of the signal wires 6 are consistent, thereby reducing the axial height of upper bus bar holder 11 and thus reducing the axial dimension of motor 100.

[0046] In the above embodiment, the specific number of the signal lines 6 can be specifically set according to the structure and requirements of the motor 100, and is not limited in the present application.

[0047] In the above embodiment, the portions of the multiple signal wires 6 extending on a plane perpendicular to the axial direction are 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, as shown in FIG. 5, the portions of the multiple signal wires 6 extending on a plane perpendicular to the axial direction are located between a portion of the outer periphery of the ring-shaped circuit board 5 and the outermost periphery of the flange structure on the edge of the housing 3, which makes it easier to assemble the motor without occupying the radial inner space of the circuit board.

[0048] In some embodiments, at least a portion of the multiple signal wires 6 overlap the edge of the housing 3 in the axial direction, thereby further making full use of the radial space of the flange structure of the edge of the housing 3 while preventing the multiple signal wires 6 from affecting the arrangement of components in the internal space of the motor 100.

[0049] It should be noted that, although the configuration and structure of the motor related to the present application have been described as examples, the present application is not limited thereto, and furthermore, appropriate modifications can be made based on the above-mentioned embodiments. Also, although the components have been described as examples, the present application is not limited thereto, and the specific contents of each component can be further referred to the related art. The motor may include other components such as end caps, bearings, etc., and the specific details can be further referred to the related art, and the description thereof will be omitted here.

[0050] As can be seen from the above embodiment, by mounting the upper busbar holder on the edge of the housing, there is no assembly tolerance between the position of the housing edge and the motor cover and lower busbar holder, which ensures the mounting position accuracy of the upper busbar holder and improves the dustproof and waterproof performance of the motor because the electrical connection positions of the upper busbar and lower busbar terminals are located inside the housing. Also, because the electrical connection positions of the terminals of the upper and lower busbars are both located inside the motor, the axial dimension of the motor can be further reduced.

[0051] Example of the second aspect In an embodiment of the present application, an electric product is provided having the motor 100 according to the embodiment of the first aspect.

[0052] In the embodiment of the first aspect, the structure of the motor 100 has already been described in detail, and the contents thereof are incorporated herein, so description thereof will be omitted here.

[0053] In the present embodiment, the electrical appliance may be any electrical device provided with a motor, such as a brake motor.

[0054] Although the present application has been described in combination with specific embodiments, it is clear to those skilled in the art 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 technical ideas and principles of the present application, and these modifications and alterations are also within the scope of the present application.

[0055] 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]

[0056] REFERENCE SIGNS LIST 1...rotor, 2...stator, 3...housing, 4...sensor magnet, 5...circuit board, 6...signal line, 10...upper busbar assembly, 11...upper busbar holder, 12...upper busbar, 13...mounting portion, 20...lower busbar assembly, 21...lower busbar holder, 22...lower busbar, 100...motor, A...upper busbar terminal, B...lower busbar terminal, X...central axis

Claims

1. A rotor having a rotation shaft that rotates around a central axis; a stator facing the rotor in a radial direction; a housing that accommodates the rotor and the stator and has an opening at one end in the axial direction; 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; a lower layer busbar assembly including a lower layer busbar holder and a lower layer busbar held by the lower layer busbar holder, the lower layer busbar including a lower layer busbar terminal; In a motor comprising: the upper bus bar holder is mounted on an edge of the opening of the housing; the lower layer bus bar holder is located axially below the upper layer bus bar holder, The upper bus bar terminal is electrically connected to the lower bus bar terminal inside the housing. A motor characterized by:

2. The motor according to claim 1, further comprising a sensor magnet, the sensor magnet being arranged radially inward of the upper layer bus bar holder and being closer to an axially lower side than an upper surface of the upper layer bus bar holder.

3. 2. The motor according to claim 1, further comprising a sensor magnet, the sensor magnet being arranged axially above a position of electrical connection between the upper layer bus bar terminal and the lower layer bus bar terminal.

4. the upper layer bus bar holder further has a mounting portion, the mounting portion being disposed on an inner periphery of the upper layer bus bar holder and positioned radially outward of the rotor, the mounting portion being integrally molded with the upper layer bus bar holder, 2. The motor according to claim 1, wherein the mounting portion is axially lower and closer to a position of electrical connection between the upper layer bus bar terminal and the lower layer bus bar terminal, and circumferentially opposed to the position of electrical connection.

5. The motor further includes a circuit board, the circuit board being mounted on the mounting portion and positioned radially outward of the rotor, 5. The motor according to claim 4, wherein the circuit board is at the same height as the positions of the electrical connections in the axial direction and faces the positions of the electrical connections in the circumferential direction.

6. At least a portion of the mounting portion is formed in a ring shape, and an inner diameter of the mounting portion is equal to or larger than an inner diameter of the stator core, 6. The motor according to claim 5, wherein at least a portion of the circuit board is formed in a ring shape, and the inner diameter of the ring is equal to or larger than the inner diameter of the mounting portion.

7. the motor further includes a plurality of signal lines integrally formed with the upper bus bar holder, one ends of the plurality of signal lines being connected to a circuit board; 2. The motor according to claim 1, wherein portions of the plurality of signal lines extending on a plane perpendicular to the axial direction are positioned on the same plane.

8. 8. The motor according to claim 7, wherein the portions of the plurality of signal lines extending on a plane perpendicular to the axial direction are closer to the radially outer side of the circuit board and closer to the radially inner side of the radial outer periphery of the edge of the housing.

9. 8. The motor according to claim 7, wherein at least a portion of the plurality of signal lines axially overlaps the edge of the housing.

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

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