motor

Abstract

The embodiment of the present application provides a motor, which comprises: a busbar assembly, the busbar assembly comprises a first busbar unit and a second busbar unit, the first busbar unit is connected with a coil lead-out wire of the motor, and the first busbar unit has a first connecting terminal connected with the second busbar unit; the second busbar unit is located at an axial side of the first busbar unit, and the second busbar unit has a second connecting terminal connected with the first connecting terminal and a power supply connecting terminal connected with an external power supply, at least a part of the second busbar unit is located inside an inner periphery of the first busbar unit in the axial observation, and the second connecting terminal and the power supply connecting terminal are located in different radial directions with the center axis of the motor as the center. Through the arrangement of the double-layer busbar, on the one hand, the generality of the existing motor connecting structure is maintained, and on the other hand, the position and structure of the electric connecting terminal can be conveniently changed according to the customer demand.

Description

Technical Field

[0001] This application relates to the field of electromechanical engineering, and more particularly to a motor. Background Technology

[0002] In existing brushless motors, a busbar assembly is provided to enable electrical connection between an external power source and the motor's internal components. This busbar assembly typically consists of a resin busbar holder and a metal busbar for electrical connection. Furthermore, the metal busbar usually extends directly to the outside of the motor to connect to the external power source; or it may be directly connected to an interface busbar assembly, which is electrically connected to the external power source at approximately the same circumferential position as the connection point with the busbar assembly.

[0003] It should be noted that the above introduction to the technical background is only for the purpose of providing a clear and complete explanation of the technical solutions of this application and facilitating understanding by those skilled in the art. It should not be assumed that these technical solutions are known to those skilled in the art simply because they have been described in the background section of this application. Summary of the Invention

[0004] The inventors discovered that, due to customer requirements and other reasons, the position of the busbar assembly connecting to the external power supply sometimes cannot be in the same circumferential position as the busbar assembly connection point. In this case, it is often necessary to redesign the structure of the busbar assembly according to customer requirements and set up corresponding molds, resulting in wasted costs. On the other hand, since the busbar assembly needs to be electrically connected to the stator coil of the motor, it is often arranged on the stator first and then installed into the motor rotor. However, sometimes the position of the power interface required by the customer will interfere with the assembly of the rotor.

[0005] To address at least one of the above-mentioned problems or other similar issues, embodiments of this application provide a motor.

[0006] According to a first aspect of the embodiments of this application, a motor is provided, the motor comprising: a busbar assembly, the busbar assembly including a first busbar unit and a second busbar unit.

[0007] The first busbar unit is connected to the coil lead of the motor, and the first busbar unit has a first connection terminal for connecting to the second busbar unit;

[0008] The second busbar unit is located on one axial side of the first busbar unit, and the second busbar unit has a second connection terminal that connects to the first connection terminal and a power connection terminal that connects to an external power source.

[0009] Viewed axially, at least a portion of the second busbar unit is located inside the inner circumference of the first busbar unit, and the second connection terminal and the power connection terminal are located in different radial directions centered on the central axis of the motor.

[0010] In some embodiments, at least a portion of the power connection terminal coincides axially with the rotor of the motor.

[0011] In some embodiments, the power connection terminal is radially outward from the inner periphery of the motor housing.

[0012] In some embodiments, the first busbar unit further has an annular first busbar retainer, the first connection terminal being located radially inside the first busbar retainer; the second busbar unit further has a resin-made second busbar retainer, the second connection terminal extending outward from the outer periphery of the second busbar retainer; the extended surfaces of the first connection terminal and the extended surfaces of the second connection terminal are radially electrically connected.

[0013] In some embodiments, the first connection terminal and the second connection terminal are connected at a position radially inward from the outer periphery of the first busbar holder.

[0014] In some embodiments, a support portion for supporting the second busbar unit is disposed between the first busbar unit and the second busbar unit in the axial direction, and the second busbar unit is disposed on the surface of the support portion on one side in the axial direction.

[0015] In some embodiments, the support portion supports a bearing disposed on the axial side of the motor.

[0016] In some embodiments, the second busbar unit and the support portion abut axially on a plurality of dispersed surfaces.

[0017] In some embodiments, the second busbar unit has a positioning pin protruding toward the support portion, and the side surface of the support portion facing the second busbar unit has a positioning hole, into which the positioning pin is inserted.

[0018] In some embodiments, the support portion has a through hole extending axially through the first connecting terminal, the root of the first connecting terminal being wrapped by a resin support wall formed of resin, the through hole being larger than the resin support wall being larger than the resin support wall being larger than the through hole ...

[0019] One of the beneficial effects of this application embodiment is that, by setting up a double-layer busbar, the universality of the existing motor connection structure is maintained on the one hand, and the position and structure of the electrical connection terminals can be easily changed according to customer needs on the other hand.

[0020] Specific embodiments of this application are disclosed in detail with reference to the following description and accompanying drawings, indicating how the principles of this application can be adopted. It should be understood that the embodiments of this application are not limited in scope. Within the spirit and scope of the appended claims, embodiments of this application include many changes, modifications, and equivalents. Attached Figure Description

[0021] The accompanying drawings, which form part of the specification, are used to provide a further understanding of the embodiments of this application and illustrate the implementation methods of this application, together with the textual description, to explain the principles of this application. Obviously, the drawings described below are merely some embodiments of this application, and those skilled in the art can obtain other drawings based on these drawings without creative effort. In the drawings:

[0022] Figure 1 This is a schematic diagram of a cross-section of the motor according to an embodiment of this application;

[0023] Figure 2 yes Figure 1 Another schematic diagram of the motor shown illustrates the first busbar unit;

[0024] Figure 3 yes Figure 1 Another schematic diagram of the motor shown illustrates the first busbar unit and the second busbar unit;

[0025] Figure 4 This is a schematic diagram of the second busbar unit;

[0026] Figure 5 yes Figure 1 Another schematic diagram of the motor shown illustrates the second busbar unit and the support portion;

[0027] Figure 6 This is a schematic diagram of the support section;

[0028] Figure 7 This is another schematic diagram of the second busbar unit. Detailed Implementation

[0029] Referring to the accompanying drawings, the foregoing and other features of this application will become apparent from the following description. Specific embodiments of this application are specifically disclosed in the description and drawings, illustrating partial implementations in which the principles of this application may be employed. It should be understood that this application is not limited to the described embodiments; rather, it includes all modifications, variations, and equivalents falling within the scope of the appended claims.

[0030] In embodiments of this application, the term "and / or" includes any one and all combinations of one or more of the terms listed in association. The terms "comprising," "including," "having," etc., refer to the presence of the stated features, elements, components, or assemblies, but do not exclude the presence or addition of one or more other features, elements, components, or assemblies.

[0031] In the embodiments of this application, the singular forms "a," "the," etc., may include the plural forms and should be broadly interpreted as "a kind" or "a class" rather than limited to the meaning of "an." Furthermore, the term "the" should be understood to include both the singular and plural forms unless the context explicitly indicates otherwise. Additionally, the term "according to" should be understood as "at least partially based on…," and the term "based on" should be understood as "at least partially based on…," unless the context explicitly indicates otherwise.

[0032] Furthermore, in the following description of this application, for ease of explanation, the direction extending along or parallel to the central axis O of the motor is referred to as "axial"; the direction pointing from the bottom of the motor housing to the opening is referred to as "axial side" or "axial upper side"; the direction pointing from the opening of the motor housing to the bottom is referred to as "axial other side" or "axial lower side"; the radial direction centered on the central axis O is referred to as "radial"; the radial direction closer to the central axis O is referred to as "radial inner side" or "inner side"; the radial direction away from the central axis O is referred to as "radial outer side" or "outer side"; and the direction around the central axis O is referred to as "circumferential". However, it is important to note that these are merely for ease of explanation and do not limit the orientation during motor use and manufacturing.

[0033] The embodiments of this application will now be described with reference to the accompanying drawings.

[0034] First aspect of the embodiments

[0035] This application provides a motor.

[0036] Figure 1 This is a schematic diagram of a cross-sectional view of a motor according to an embodiment of this application. Figure 1As shown, the motor 100 includes a busbar assembly 11, which includes a first busbar unit 111 and a second busbar unit 112. The first busbar unit 111 is connected to the coil lead 151 of the motor 100 and has a first connection terminal 113 for connecting the second busbar unit 112. The second busbar unit 112 is located on one axial side of the first busbar unit 111 and has a second connection terminal 114 for connecting the first connection terminal 113 and a power connection terminal 115 for connecting to an external power source.

[0037] The above description only covers the structure of the motor relevant to this application. Figure 1 As shown, the motor also includes a shaft 12 and a bearing for retaining the shaft 12. Figure 1 As shown in 13-1 and 13-2), the rotor 14 arranged around the shaft 12, the stator 15 arranged radially opposite to the rotor 14, the housing 16 that houses the stator 15 and the rotor 14, etc., can be referred to in related technologies for details, which are omitted here.

[0038] Figure 2 yes Figure 1 Another schematic diagram of the motor shown illustrates the motor as viewed from the axial side, and shows the first busbar unit 111; Figure 3 yes Figure 1 Another schematic diagram of the motor is shown, illustrating the motor as viewed from the axial side, and showing the first busbar unit 111 and the second busbar unit 112; Figure 4 This is a schematic diagram of the second busbar unit 112.

[0039] like Figure 2 and Figure 3 As shown in this embodiment, when viewed axially, at least a portion of the second busbar unit 112 is located inside the inner circumference of the first busbar unit 111, and the second connection terminal 114 and the power connection terminal 115 are located in different radial directions centered on the central axis O of the motor. That is, the second connection terminal 114 and the power connection terminal 115 are located at different positions on the circumference.

[0040] In the above embodiment, the motor's busbar assembly has a multi-layer structure. The bottom busbar unit (first busbar unit 111) holds the coil and is connected to the top busbar unit (second busbar unit 112). The power connection terminals of the top busbar unit, which connect to the external power supply, are not located at the same position on the circumference as the bottom and top busbar units, i.e., they are radially offset. Therefore, the bottom busbar unit can maintain the original busbar unit structure, while the top busbar unit satisfies the customer's power connection position. This maintains the versatility of the existing motor's electrical connection structure and allows for convenient modification of the position and structure of the electrical connection terminals according to customer needs.

[0041] In some embodiments, such as Figure 3 As shown, at least a portion of the power connection terminal 115 overlaps axially with the motor rotor 14. Therefore, the bottom busbar unit (first busbar unit 111) can be assembled to the motor first, followed by the rotor assembly, and the power connection terminal, which affects the motor rotor assembly, can be assembled last. This satisfies both the connection of the coil leads and facilitates rotor assembly.

[0042] In some embodiments, such as Figure 3 As shown, the power connection terminal 115 is radially outward from the inner periphery of the motor housing 16. Therefore, after assembling the first busbar unit 111 to the motor, the second busbar unit 112 can be assembled, allowing the second busbar unit 112 to be mounted on the motor housing 16. This facilitates the assembly of the second busbar unit 112 and can also accommodate the customer's power connection position requirements.

[0043] In some embodiments, such as Figure 2 As shown, the first busbar unit 111 also has an annular first busbar retainer 116, and the first connection terminal 113 is located radially inside the first busbar retainer 116; as Figure 3 and Figure 4 As shown, the second busbar unit 112 also has a resin-made second busbar retainer 117, and the second connection terminal 114 extends outward from the outer periphery of the second busbar retainer 117; as Figure 3 As shown, the extended surfaces of the first connecting terminal 113 and the second connecting terminal 114 are radially electrically connected. This allows for reliable contact between the first connecting terminal 113 and the second connecting terminal 114.

[0044] In the above embodiments, such as Figure 3As shown, the extended surfaces of the first connecting terminal 113 and the second connecting terminal 114 are axially extending surfaces, which saves circumferential space of the motor, simplifies the forming process, and ensures a sufficient electrical connection between the first connecting terminal 113 and the second connecting terminal 114. However, this application is not limited to this; the extended surfaces of the first connecting terminal 113 and the second connecting terminal 114 can also be radially extending surfaces that overlap axially, thereby ensuring an axial electrical connection between the extended surfaces of the first connecting terminal 113 and the second connecting terminal 114, achieving reliable contact between them.

[0045] In some embodiments, the first connection terminal 113 and the second connection terminal 114 are connected at a position radially inward from the outer periphery of the first busbar holder 116. This saves on the amount of busbar used and prevents interference between the first connection terminal 113 and the second connection terminal 114 and the housing 16.

[0046] In some embodiments, such as Figure 1 As shown, a support portion 17 for supporting the second busbar unit 112 is further disposed between the first busbar unit 111 and the second busbar unit 112 in the axial direction, and the second busbar unit 112 is disposed on the surface of the support portion 17 on one side of the axial direction. Thus, the support portion 17 can reliably support the second busbar unit 112.

[0047] In some embodiments, such as Figure 1 As shown, the support portion 17 supports the bearing 13-1, which is disposed on the axial side of the motor 100. Thus, the support portion 17 functions as both a support portion for the second busbar unit 112 and a bearing support portion, saving on components.

[0048] Figure 5 yes Figure 1 Another schematic diagram of the motor is shown, illustrating the motor as viewed from the axial side, and showing the second busbar unit 112, the support 17, and the client module 18; Figure 6 This is a schematic diagram of the support part 17. Figure 6 Client module 18 is also shown; Figure 7 This is another schematic diagram of the second busbar unit 112, showing the surface of the second busbar unit 112 facing the support portion 17.

[0049] In some embodiments, the second busbar unit 112 and the support portion 17 abut axially on a plurality of dispersed surfaces. For example, as Figure 6 As shown, the surface of the support portion 17 facing the second busbar unit 112 has a plurality of first protruding surfaces S1; as Figure 7As shown, the surface of the second busbar unit 112 facing the support portion 17 has a plurality of second protruding surfaces S2, and the second busbar unit 112 and the support portion 17 abut against each other in the axial direction through the plurality of first protruding surfaces S1 and the plurality of second protruding surfaces S2.

[0050] In the above embodiments, if the support portion 17 and the second busbar unit 112 do not have multiple dispersed contact surfaces, but instead abut against each other with the entire surface, insufficient flatness dimension management may lead to insufficient contact, tilted contact, etc. However, by using multiple dispersed contact surfaces for contact, reliable contact between the two can be achieved, tilted contact can be prevented, and dimension management is easier.

[0051] In the above embodiments, the plurality of abutment surfaces may not be on the same straight line, thereby further enabling reliable contact between the two. However, this application is not limited to this; that is, in some embodiments, the plurality of abutment surfaces may also be located on the same straight line.

[0052] In some embodiments, such as Figure 7 As shown, the second busbar unit 112 has a locating pin P protruding toward the support portion 17, such as Figure 6 As shown, the support portion 17 has a positioning hole H1 on the side surface facing the second busbar unit 112, and the positioning pin P is inserted into the positioning hole H1. As a result, the second busbar unit 112 can be positioned approximately circumferentially relative to the support portion 17. In addition, together with the motor shaft 11, a two-point positioning is formed, which can prevent the second busbar unit 112 from rotating circumferentially.

[0053] In some embodiments, such as Figure 6 As shown, the support portion 17 has a through hole H2 extending axially through the first connecting terminal 113. The root of the first connecting terminal 113 is wrapped by a resin support wall (not shown in the figure) molded from resin. The size of the through hole H2 is larger than the size of the resin support wall, and the resin support wall extends into the through hole H2. This enables reliable insulation between the first connecting terminal 13 and the support portion 17.

[0054] In the above embodiment, there is a gap between the second connecting terminal 114 and the support portion 17. This allows for reliable insulation between the second connecting terminal 114 and the support portion 17.

[0055] The motors of the present application embodiments have been described above from different perspectives through different implementations. These embodiments can be combined arbitrarily, and further details are omitted here. Furthermore, the above descriptions are merely illustrative, but the present application is not limited thereto. Appropriate modifications can be made based on the above implementation methods, and these modifications are also omitted here.

[0056] According to the above embodiments of this application, the double-layer busbar configuration maintains the universality of the existing motor connection structure on the one hand, and allows for convenient changes to the position and structure of the electrical connection terminals according to customer needs on the other hand.

[0057] Second aspect of the embodiments

[0058] This application provides an electrical product having a motor 100 as described in the first aspect embodiment. Since the structure of the motor 100 has been described in detail in the first aspect embodiment, the details are incorporated herein by reference and are omitted here.

[0059] In the embodiments of this application, the electrical product can be any device or equipment using the motor 100, including various household appliances, office automation equipment, industrial equipment, vehicle devices, or components in various devices, such as an electronic power steering component using the motor 100.

[0060] The present application has been described above with reference to specific embodiments. However, those skilled in the art should understand that these descriptions are exemplary and 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 its spirit and principles, and these modifications and variations are also within the scope of the present application.

[0061] Preferred embodiments of this application have been described above with reference to the accompanying drawings. Many features and advantages of these embodiments are apparent 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. Furthermore, since many modifications and alterations will readily occur to those skilled in the art, the embodiments of this application are not intended to be limited to the precise structures and operations illustrated and described, but rather to encompass all suitable modifications and equivalents falling within their scope.

Claims

1. A motor, the motor comprising a busbar assembly, the busbar assembly comprising a first busbar unit and a second busbar unit, The first busbar unit is connected to the coil lead of the motor, and the first busbar unit has a first connection terminal for connecting to the second busbar unit; The second busbar unit is located on one axial side of the first busbar unit, and the second busbar unit has a second connection terminal that connects to the first connection terminal and a power connection terminal that connects to an external power source. Its features are, Viewed axially, at least a portion of the second busbar unit is located inside the inner circumference of the first busbar unit, and the second connection terminal and the power connection terminal are located in different radial directions centered on the central axis of the motor.

2. The motor according to claim 1, characterized in that, At least a portion of the power connection terminal is axially aligned with the rotor of the motor.

3. The motor according to claim 1, characterized in that, The power connection terminal is radially outer than the inner circumference of the motor housing.

4. The motor according to claim 1, characterized in that, The first busbar unit also has an annular first busbar retainer, and the first connection terminal is located radially inside the first busbar retainer; The second busbar unit also has a resin-made second busbar retainer, and the second connection terminal extends outward from the outer periphery of the second busbar retainer; The extended surfaces of the first connecting terminal and the second connecting terminal are electrically connected in the radial direction.

5. The motor according to claim 4, characterized in that, The first connecting terminal and the second connecting terminal are connected at a position radially inward from the outer periphery of the first busbar holder.

6. The motor according to claim 1, characterized in that, A support portion for supporting the second busbar unit is disposed between the first busbar unit and the second busbar unit in the axial direction, and the second busbar unit is disposed on the surface of the support portion on one side in the axial direction.

7. The motor according to claim 6, characterized in that, The support portion supports a bearing disposed on one axial side of the motor.

8. The motor according to claim 6, characterized in that, The second busbar unit and the support portion abut axially on multiple distributed surfaces.

9. The motor according to claim 6, characterized in that, The second busbar unit has a positioning pin protruding toward the support portion, and the side surface of the support portion facing the second busbar unit has a positioning hole, into which the positioning pin is inserted.

10. The motor according to claim 6, characterized in that, The support portion has a through hole extending axially for the passage of the first connecting terminal. The root of the first connecting terminal is wrapped by a resin support wall formed by resin molding. The size of the through hole is larger than the size of the resin support wall. The resin support wall extends into the through hole.

Images