Motor bearing housing structure and motor

Abstract

This utility model relates to the field of motor technology, and discloses a motor bearing housing structure and a motor. The motor bearing housing structure includes a plastic frame with a metal ring inside for mounting the bearing. At least a portion of the plastic frame and the metal ring are provided with heat-conducting elements, which are thermally connected to the metal ring. The thermal conductivity of the heat-conducting elements is greater than that of the plastic constituting the plastic frame. Because the metal ring inside the plastic frame meets strength requirements, and the thermal conductivity of the heat-conducting elements is greater than that of the plastic, and because the heat-conducting elements are correspondingly positioned with the metal ring, the heat generated by the high-speed rotation of the bearing inside the metal ring can be better dissipated through the heat-conducting elements. Therefore, the motor bearing housing structure of this utility model can both meet strength requirements and improve heat dissipation.

Description

Technical Field

[0001] This utility model relates to the field of motor technology, and in particular to a motor bearing housing structure and a motor. Background Technology

[0002] Existing technology discloses a motor bearing housing structure and a motor. The motor bearing housing structure includes an upper metal ring and a lower metal ring located on the upper and lower sides of the stator. An insulating base integrally injection-molded with the stator core is provided outside the core. The upper and lower metal rings are positioned opposite each other at the upper and lower ends of the insulating base and are integrally injection-molded with the base. This simplifies the manufacturing process, improves the concentricity and other machining accuracy of the motor bearing housing structure, and ensures consistent precision in mass production. However, because both the upper and lower metal rings are made of hot-melt plastic, the strength of the motor bearing housing structure is not high.

[0003] To address this technical problem, the prior art discloses a motor bearing housing structure that uses a plastic skeleton combined with a metal ring. Although the metal ring can improve strength, its outer side is entirely wrapped with a thermoplastic skeleton. The thermoplastic material has poor thermal conductivity, which is not conducive to the dissipation of heat generated during bearing operation, resulting in poor heat dissipation of the motor bearing housing structure. Utility Model Content

[0004] The first technical problem solved by this utility model is to provide a motor bearing housing structure that effectively solves the problem that existing motor bearing housing structures cannot simultaneously meet strength requirements and improve heat dissipation.

[0005] The second technical problem solved by this utility model is to provide a motor that effectively solves the problem that the existing motor bearing housing structure cannot simultaneously meet the strength requirements and improve the heat dissipation effect.

[0006] The first technical problem mentioned above is solved by the following technical solution:

[0007] An electric motor bearing housing structure includes a plastic frame with a metal ring inside for mounting a bearing. At least a portion of the plastic frame corresponding to the metal ring has a heat-conducting element, which is thermally connected to the metal ring. The thermal conductivity of the heat-conducting element is greater than that of the plastic constituting the plastic frame.

[0008] Compared with the prior art, the motor bearing chamber structure of this utility model has the following advantages: Since a metal ring is provided inside the plastic skeleton, the metal ring can meet the strength requirements. Simultaneously, by setting at least a portion of the plastic skeleton and the corresponding metal ring as heat-conducting elements, the heat-conducting elements are thermally connected to the metal ring. Furthermore, the thermal conductivity of the heat-conducting elements is greater than that of the plastic constituting the plastic skeleton. Compared to plastic, the heat-conducting elements have better thermal conductivity, allowing the heat generated by the high-speed rotation of the bearing inside the metal ring to be better dissipated through the heat-conducting elements. Compared with the skeletons in related technologies that are entirely made of hot-melt plastic, the motor bearing chamber structure of this utility model has better heat dissipation. Therefore, the motor bearing chamber structure of this utility model can both meet the strength requirements and improve the heat dissipation effect.

[0009] In one embodiment, the thermal conductivity of the heat-conducting element is greater than 1 W / (m·K).

[0010] In one embodiment, the heat-conducting element is made of bulk molding compound.

[0011] In one embodiment, the surface area of ​​the heat-conducting element is 40%-50% of the surface area of ​​the metal ring.

[0012] In one embodiment, the plastic frame is provided with an assembly part, which is correspondingly arranged with the metal ring, and the heat-conducting component is disposed in the assembly part.

[0013] In one embodiment, multiple assembly parts and multiple heat-conducting components are provided along the circumferential direction, with the multiple assembly parts spaced apart and the multiple heat-conducting components corresponding to each other in the multiple assembly parts.

[0014] In one embodiment, the assembly part is an assembly groove;

[0015] And / or, the assembly part and the heat-conducting element are triangular in shape.

[0016] In one embodiment, the assembly groove is a through groove, and the heat-conducting component abuts against the metal ring;

[0017] And / or, in two adjacent assembly parts, one of the top corners of one assembly part is arranged facing upwards, and one of the top corners of the other assembly part is arranged facing downwards.

[0018] In one embodiment, the heat-conducting component and the plastic skeleton are fixed by a plastic coating process.

[0019] The second technical problem mentioned above is solved by the following technical solution:

[0020] An electric motor includes a stator assembly and the aforementioned motor bearing housing structure, wherein the stator assembly is disposed within the plastic frame.

[0021] Compared with the prior art, the motor described in this utility model has the following advantages: During motor operation, by setting a metal ring inside the plastic frame, the strength requirements can be met. At the same time, since the bearing inside the metal ring rotates at high speed, the heat generated is not easily dissipated. By setting the thermal conductivity of the heat-conducting component corresponding to the metal ring in the motor bearing chamber structure to be greater than that of the plastic, the heat-conducting component has better thermal conductivity and can dissipate the heat generated by the bearing more quickly, which greatly improves the heat dissipation effect of the motor bearing chamber structure and increases the service life of the motor. Attached Figure Description

[0022] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the structure of a motor according to an embodiment of the present utility model;

[0024] Figure 2 for Figure 1 The side view of the motor shown;

[0025] Figure 3 for Figure 2 A cross-sectional view along the AA direction of the unfilled BMC plastic;

[0026] Figure 4 for Figure 2 A cross-sectional view along the AA direction filled with BMC plastic.

[0027] Explanation of reference numerals in the attached figures:

[0028] 1. Metal ring; 101. Upper metal ring; 102. Lower metal ring; 2. Plastic skeleton; 201. Main body; 202. Assembly ring; 2021. Assembly part; 203. Mounting groove; 3. Stator assembly; 4. Pin holder; 5. Pin; 6. Heat-conducting component. Detailed Implementation

[0029] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0030] In the description of this application, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0031] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0032] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0033] The following is combined Figures 1 to 4 The following describes embodiments of the present invention.

[0034] According to an embodiment of the present invention, in a first aspect, a motor bearing housing structure is provided, including a plastic frame 2, a metal ring 1 disposed inside the plastic frame 2, the metal ring 1 being used to install a bearing, and at least a portion of the plastic frame 2 corresponding to the metal ring 1 being provided with a heat-conducting element 6, the heat-conducting element 6 being thermally connected to the metal ring 1, the thermal conductivity of the heat-conducting element 6 being greater than the thermal conductivity of the plastic constituting the plastic frame.

[0035] Because a metal ring 1 is provided inside the plastic skeleton 2, the metal ring 1 can meet the strength requirements. At the same time, by setting at least a portion of the plastic skeleton 2 and the metal ring 1 as heat-conducting elements 6, the heat-conducting elements 6 are thermally connected to the metal ring 1, and the thermal conductivity of the heat-conducting elements 6 is greater than that of the plastic constituting the plastic skeleton. Compared with plastic, the heat-conducting elements 6 have better thermal conductivity, so the heat generated by the high-speed rotation of the bearing inside the metal ring 1 can be better dissipated through the heat-conducting elements 6. Compared with the skeletons in related technologies that use only hot-melt plastic, the heat dissipation effect of the motor bearing chamber structure of this utility model is better. Therefore, the motor bearing chamber structure of this utility model can meet the strength requirements and improve the heat dissipation effect.

[0036] In one embodiment, the thermal conductivity of the heat-conducting element 6 is greater than 1 W / (m·K). The thermal conductivity of typical hot-melt plastics is generally 0.1 W / (m·K) to 0.5 W / (m·K). By setting the thermal conductivity of the heat-conducting element 6 to be greater than 1 W / (m·K), it ensures that the thermal conductivity of the heat-conducting element 6 is at least twice that of the plastic. Since the heat-conducting element 6 is positioned corresponding to the metal ring 1, it can effectively dissipate the heat generated by the high-speed rotation of the bearing within the metal ring 1. Alternatively, the thermal conductivity of the heat-conducting element 6 can be set even higher, such as greater than 1.5 W / (m·K), or it can be set lower, i.e., greater than the thermal conductivity of the plastic but less than 1 W / (m·K).

[0037] Specifically, the heat-conducting component 6 is made of bulk molding compound (BMC) plastic. BMC is a thermosetting plastic with a higher thermal conductivity and better thermal performance compared to thermoplastics. Its high thermal conductivity, high temperature resistance, and moisture resistance allow it to form an efficient heat conduction path around the metal ring 1, accelerating heat dissipation during bearing operation and reducing bearing temperature rise. Alternatively, the heat-conducting component 6 can be made of other materials with higher thermal conductivity than plastic; this is not a limitation.

[0038] It should be noted that the heat-conducting component 6 here uses a bulk molding compound with a thermal conductivity greater than 1W / (m·K), that is, a filled bulk molding compound, such as a bulk molding compound filled with alumina, or a bulk molding compound filled with other fillers. The specific choice can be made according to actual needs, and no further restrictions are imposed here.

[0039] like Figure 1 As shown, the portion of the plastic frame 2 corresponding to the metal ring 1 is provided with a heat-conducting element 6, which ensures the coaxiality of the plastic frame 2 and the stator assembly 3 of the motor. Alternatively, in a different implementation, all portions of the plastic frame 2 corresponding to the metal ring 1 can be provided with heat-conducting elements 6, meaning the heat-conducting elements 6 completely cover the outer surface of the metal ring 1.

[0040] In one embodiment, the surface area of ​​the heat-conducting element 6 is 40%-50% of the surface area of ​​the metal ring 1.

[0041] Since the heat-conducting component 6 does not completely cover the outer surface of the metal ring 1, but is only provided on the portion of the plastic frame 2 corresponding to the metal ring 1, the surface area of ​​the heat-conducting component 6 is 40%-50% of the surface area of ​​the metal ring 1 to ensure sufficient effective heat dissipation area. As an alternative implementation, the surface area of ​​the heat-conducting component 6 can also be 55%-60% or 35%-39% of the surface area of ​​the metal ring 1, or other specific values, which can be adjusted according to actual needs.

[0042] Specifically, the thickness of the heat-conducting component 6 is close to the wall thickness of the metal ring 1, and can be set to 0.8mm. It should be made as thin as possible while ensuring strength, so as not to increase thermal resistance and hinder heat dissipation. Of course, in actual settings, the wall thickness can also be set to other specific values ​​according to actual needs.

[0043] Specifically, the height of the heat-conducting component 6 can be comparable to the height of the metal ring 1. Of course, the height of the heat-conducting component 6 can also be set to be higher or lower than the height of the metal ring 1; no further restrictions are imposed here.

[0044] In one embodiment, multiple assembly portions 2021 and heat-conducting components 6 are provided circumferentially, with the multiple assembly portions 2021 spaced apart and the multiple heat-conducting components 6 correspondingly disposed within the multiple assembly portions 2021. Specifically, the assembly portion 2021 is an assembly groove, and the shape and size of the heat-conducting component 6 match the assembly groove to facilitate assembly, allowing the heat-conducting component 6 to be fitted into the assembly groove, while also enhancing the bonding force and preventing material delamination at high temperatures.

[0045] In actual installation, the assembly groove is a through groove, with the heat-conducting component 6 abutting against the metal ring 1. This allows the heat-conducting component 6 to directly contact the metal ring 1, making it easier for the heat-conducting component 6 to dissipate heat outward and improving heat conduction efficiency. As an alternative implementation, the assembly groove can also be a semi-enclosed groove, with the end near the metal ring 1 closed.

[0046] like Figure 1 As shown, both the assembly part 2021 and the heat-conducting component 6 are triangular in shape. By setting the shapes of the assembly part 2021 and the heat-conducting component 6 to triangular, and using the concave-convex form of the triangular structure for interlocking, local stress concentration can be reduced. Furthermore, even after the material absorbs moisture and expands in a high-humidity environment, the triangular structure can maintain a tight fit, improving connection reliability. As an alternative implementation, the assembly part 2021 and the heat-conducting component 6 can also be set to other shapes, such as squares; no further limitations are imposed here.

[0047] like Figure 2As shown, in two adjacent assembly parts, one assembly part has one apex angle facing upwards, while the other assembly part has one apex angle facing downwards. This allows for more efficient use of the circumferential space, enabling the installation of more circumferential assembly parts. Alternatively, in a different implementation, the triangular arrangement of two adjacent assembly parts can be identical.

[0048] In one embodiment, the heat-conducting component 6 and the plastic frame 2 are fixedly formed using a plastic coating process. Fixing the heat-conducting component 6 and the plastic frame 2 using this process reduces assembly steps. Furthermore, since the heat-conducting component 6 and the plastic frame 2 are formed as a single unit, they can jointly seal the metal ring 1, preventing moisture intrusion and suppressing vibration deformation of the metal ring 1 at high speeds. Alternatively, the heat-conducting component 6 and the plastic frame 2 can be integrally formed using other processes.

[0049] During assembly, the heat-conducting component 6 is first placed inside the assembly part 2021 of the plastic frame 2, and then the heat-conducting component 6 and the plastic frame 2 are fixed and formed by the plastic coating process.

[0050] like Figure 3 and Figure 4 As shown, along the vertical direction, the plastic frame 2 includes a main body 201 for mounting the stator assembly 3 and an assembly ring 202 for mounting the metal ring 1. The assembly part 2021 is disposed on the assembly ring 202. There are two assembly rings 202, located above and below the main body 201, respectively. The metal ring 1 includes an upper metal ring 101 and a lower metal ring 102. The upper metal ring 101 is disposed within the upper assembly ring 202, and the lower metal ring 102 is disposed within the lower assembly ring 202.

[0051] In one embodiment, the metal ring 1 is made of iron. By setting the metal ring 1 to be made of iron, that is, by enclosing an iron ring structure within the plastic frame 2, a combination of lightweight and high rigidity in the motor bearing housing structure can be achieved. Alternatively, the metal ring 1 can be made of other metals.

[0052] The metal ring 1 and the plastic frame 2 are integrally molded using a plastic coating process, which reduces assembly processes and improves assembly efficiency. Alternatively, the metal ring 1 and the plastic frame 2 can be assembled separately.

[0053] According to an embodiment of the present invention, in a second aspect, an electric motor is also provided, including a stator assembly 3 and the above-described motor bearing housing structure, wherein the stator assembly 3 is disposed within a plastic frame 2.

[0054] The stator assembly 3 is located between the upper metal ring 101 and the lower metal ring 102.

[0055] like Figures 1-4 As shown, the motor includes a needle holder 4, on which an energized needle 5 is fixed. The plastic frame 2 is provided with an annular mounting groove 203, and the bottom of the needle holder 4 is embedded in the mounting groove 203.

[0056] The motor includes bearings, which are housed within a metal ring 1.

[0057] In one embodiment, the stator assembly 3 is integrally formed with the plastic frame 2 through a plastic coating process, which reduces assembly processes and improves assembly efficiency. Alternatively, the stator assembly 3 and the plastic frame 2 can be assembled separately. This method facilitates the disassembly and maintenance of the stator assembly 3 and allows for the selection of different stator assemblies 3 according to motors of different power ratings, improving the compatibility between the stator assembly 3 and the motor.

[0058] In the specific implementation of the above embodiments, the technical features can be combined in any non-contradictory way. For the sake of brevity, not all possible combinations of the above technical features are described. However, as long as the combination of these technical features is not contradictory, it should be considered to be within the scope of this specification.

[0059] The specific embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are detailed, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A motor bearing housing structure, characterized in that: The device includes a plastic frame (2), a metal ring (1) is provided inside the plastic frame (2), the metal ring (1) is used to install bearings, and at least a portion of the plastic frame (2) corresponding to the metal ring (1) is provided with a heat-conducting element (6), the heat-conducting element (6) is thermally connected to the metal ring (1), and the thermal conductivity of the heat-conducting element (6) is greater than the thermal conductivity of the plastic constituting the plastic frame (2).

2. The motor bearing housing structure according to claim 1, characterized in that: The thermal conductivity of the heat-conducting component (6) is greater than 1 W / (m·K).

3. The motor bearing housing structure according to claim 2, characterized in that: The heat-conducting component (6) is made of bulk molding compound.

4. The motor bearing housing structure according to any one of claims 1-3, characterized in that: The surface area of ​​the heat-conducting component (6) is 40%-50% of the surface area of ​​the metal ring (1).

5. The motor bearing housing structure according to any one of claims 1-3, characterized in that: The plastic frame (2) is provided with an assembly part (2021), which is correspondingly provided with the metal ring (1), and the heat-conducting component (6) is provided in the assembly part (2021).

6. The motor bearing housing structure according to claim 5, characterized in that: Along the circumferential direction, there are multiple assembly parts (2021) and multiple heat-conducting components (6), with multiple assembly parts (2021) spaced apart, and multiple heat-conducting components (6) arranged one-to-one in the multiple assembly parts (2021).

7. The motor bearing housing structure according to claim 6, characterized in that: The assembly section (2021) is an assembly slot; And / or, the assembly part (2021) and the heat-conducting element (6) are triangular in shape.

8. The motor bearing housing structure according to claim 7, characterized in that: The assembly groove is a through groove, and the heat-conducting component (6) abuts against the metal ring (1); And / or, in two adjacent assembly parts (2021), one of the top corners of one assembly part (2021) is arranged facing upwards, and one of the top corners of the other assembly part (2021) is arranged facing downwards.

9. The motor bearing housing structure according to any one of claims 1-3 and 6-8, characterized in that: The heat-conducting component (6) and the plastic skeleton (2) are fixed and formed by plastic coating process.

10. An electric motor, characterized in that: The device includes a stator assembly (3) and a motor bearing housing structure according to any one of claims 1-9, wherein the stator assembly (3) is disposed within the plastic frame (2).

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