Stator assembly and motor

Abstract

This utility model relates to a stator assembly and a motor. The stator assembly includes a stator core and a stator support. The stator core includes an inner connecting portion and core units. The stator support includes a supporting chassis and a core support frame. The core support frame is annular and is disposed on the outer periphery of the supporting chassis. The core support frame includes a supporting ring portion and multiple winding frames formed on the periphery of the supporting ring portion. The stator core is disposed within the core support frame, the inner connecting portion is disposed within the supporting ring portion, and the core units are disposed one-to-one within the winding frames. The above-mentioned connection form between the stator core and the core support frame is beneficial to achieving the stability of the connection between the stator core and the core support frame, reducing the manufacturing cost of the motor, and improving the production efficiency of the motor.

Description

Technical Field

[0001] This utility model belongs to the field of fitness equipment technology, specifically, it relates to a stator assembly and a motor. Background Technology

[0002] In fitness equipment such as cycling machines or rowing machines, external rotor motors are typically installed in the center of the device. They combine with the user's strength via gears or chains to rotate a generator and produce electricity. Due to their simple structure, high efficiency, low noise, and durability, they have become one of the most widely used generator types in the fitness equipment industry.

[0003] The stator assembly of an external rotor motor, which supports the stator core, is mainly divided into two types: sheet metal stamping parts and steel plate forging parts. Due to its own restoring force, sheet metal stamping can cause the motor mounting surface to shift inward, resulting in difficulties in motor installation. On the other hand, steel plate forging parts have the problems of high cost and heavy motor weight. Utility Model Content

[0004] The purpose of this utility model is to provide a stator assembly and motor to solve the problems in the prior art where the material of the bracket used to support the stator core in the existing external rotor motor is sheet metal or steel plate, which leads to its large weight, difficult installation and positioning, and high cost.

[0005] To achieve the above-mentioned objectives, the present invention employs the following technical solution: In one aspect, the present invention provides a stator assembly comprising: A stator core, comprising an annular inner connecting portion and core units circumferentially spaced on the outer wall of the inner connecting portion; A stator support includes a support chassis and a core support frame. The core support frame is annular and is disposed on the outer periphery of the support chassis. The core support frame includes a support ring portion and a plurality of winding frames formed on the periphery of the support ring portion. The stator core is disposed within the core support frame, the inner connecting part is disposed within the support ring part, and the core units are disposed one-to-one within the winding frame.

[0006] In some embodiments of this application, the supporting chassis and the core support frame are integrally injection molded structures, and the stator core is integrally formed within the stator support frame.

[0007] During processing, the stator core is first placed in the mold cavity and then integrally formed into the stator support through injection molding.

[0008] In some embodiments of this application, a positioning boss is further provided at the center of the support chassis, and a main shaft is provided on the positioning boss. The main shaft is connected to the support chassis by injection molding.

[0009] The stator core and stator support are fixed to the motor housing by a spindle. The spindle is pre-placed in the mold cavity and connected and fixed to the support chassis by injection molding.

[0010] In some embodiments of this application, each of the winding frames has an outer through-hole formed on the outer wall opposite to the supporting chassis.

[0011] In some embodiments of this application, an inner through portion is formed on the inner wall of the support ring near the support chassis.

[0012] The stator core is in contact with the outside at the outer and inner penetration points, while the other parts are enclosed within the core support frame.

[0013] In some embodiments of this application, the support chassis is also provided with a plurality of heat dissipation holes at intervals along the periphery of the positioning boss.

[0014] In some embodiments of this application, the supporting chassis is further provided with a plurality of reinforcing parts, and each of the reinforcing parts is radially distributed around the positioning boss.

[0015] In some embodiments of this application, a reinforcing disc is further provided inside the supporting chassis, and the material of the reinforcing disc is carbon structural steel.

[0016] The reinforcing discs are used to improve the structural strength of the support base plate and prevent the injection-molded support base from deforming under stress.

[0017] In some embodiments of this application, the reinforcing disk has mating holes corresponding to each of the heat dissipation holes and reinforcing ribs corresponding to each of the reinforcing parts.

[0018] In another aspect, the present invention also proposes an electric motor that includes the stator assembly involved in any of the above claims.

[0019] Compared with the prior art, the advantages and positive effects of this utility model are: The stator assembly involved in this application has a stator core disposed within a core support frame. The core support frame includes a support ring and a winding frame. The inner connection part of the stator core is located within the support ring, and the core unit is disposed within the corresponding winding frame. The above-mentioned connection form between the stator core and the core support frame is beneficial to achieving the stability of the connection between the stator core and the core support frame.

[0020] The supporting chassis and iron core support frame are integrally molded by injection molding, resulting in low manufacturing costs and high installation accuracy. The stator iron core is integrally molded inside the stator support frame. Compared with steel plate forging support frames, this can significantly reduce raw material costs and improve processing and installation efficiency. It eliminates the need for production processes such as press-fitting and welding between forged support frames and stator iron cores, as well as the need for insulating sheets installed between the stator iron core and coils, thereby reducing the manufacturing cost of the motor and improving its production efficiency.

[0021] Other features and advantages of this utility model will become clearer after reading the detailed embodiments of this utility model in conjunction with the accompanying drawings. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the embodiments 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 based on these drawings without creative effort.

[0023] Figure 1 This is a perspective view of one embodiment of the stator assembly proposed in this utility model; Figure 2 This is an exploded view of the stator assembly proposed in this utility model; Figure 3 This is a cross-sectional view of the stator assembly proposed in this utility model; Figure 4 This is a schematic cross-sectional view of the stator assembly proposed in this utility model; Figure 5 This is a structural diagram of the stator support proposed in this utility model; Figure 6 This is a structural diagram of the stator core proposed in this utility model; Figure 7 This is a diagram of the supporting chassis structure proposed in this utility model; In the picture, 100. Stator support; 110. Support chassis; 111. Heat dissipation holes; 112. Positioning boss; 113. Fastening holes; 114. Reinforcing section; 120. Core support frame; 121. Support ring; 122. Winding frame; 1221. Outer through-hole; 1222. Inner through-hole; 130. Reinforcing disc; 131. Connecting hole; 132. Reinforcing rib; 200. Stator core; 210. Internal connection part; 220. Core unit; 300. Spindle. Detailed Implementation

[0024] 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.

[0025] 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.

[0026] 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.

[0027] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections, direct connections, or indirect connections through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0028] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0029] The following disclosure provides many different embodiments or examples for implementing various structures of the present invention. To simplify the disclosure, specific examples of components and arrangements are described below. Of course, these are merely examples and are not intended to limit the scope of the invention. Furthermore, reference numerals and / or reference letters may be repeated in different examples; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed.

[0030] This utility model proposes a stator assembly and a motor. The motor includes a stator assembly, a rotor assembly and a main shaft 300. The motor involved in this application is an external rotor motor, that is, the rotor assembly is located outside the stator assembly.

[0031] This external rotor motor is used in fitness equipment, such as, but not limited to, treadmills, exercise bikes, etc.

[0032] Fitness equipment includes a main body, on which a movable part is provided that can move relative to the main body. The movable part provides the fitness equipment with the means for users to perform fitness movements in order to achieve the fitness effect.

[0033] For example, when the fitness equipment is a treadmill, the moving part is the running belt set on the treadmill; when the fitness equipment is a stationary bike, the moving part is the pedals set on the stationary bike.

[0034] The motion unit is connected to the rotor assembly via a transmission assembly, and the stator assembly is fixedly connected to the main body of the equipment via a main shaft 300.

[0035] The transmission component can be a belt, chain, or other transmission structure specifically designed for the fitness equipment. When the transmission component is a belt, a pulley is specifically designed on the rotor assembly to connect with the transmission component and achieve the transmission purpose. When the transmission component is a chain, a gear is specifically designed on the rotor assembly to connect with the transmission component.

[0036] refer to Figures 1-3 The stator assembly includes a stator core 200 and a stator support 100, with the stator support 100 providing support for the stator core 200.

[0037] Combination Figure 6 The stator core 200 includes an inner connection part 210 and a core unit 220.

[0038] The inner connecting portion 210 is annular, and the iron core units 220 are arranged at intervals along the circumference of the inner connecting portion 210 on the outer periphery of the inner connecting portion 210.

[0039] Combination Figure 5The stator support 100 includes a support chassis 110 and a core support frame 120. The support chassis 110 has a disc-shaped structure, and the core support frame 120 is annular and is arranged on the outer periphery of the support chassis 110.

[0040] The core support 120 includes a support ring portion 121 and a plurality of winding frames 122 formed around the support ring portion 121.

[0041] The number of winding frames 122 is the same as the number of iron core units 220, and they correspond one-to-one.

[0042] Among them, combined Figure 4 The stator core 200 is installed inside the core support frame 120, the inner connection part 210 is installed inside the support ring part 121, and the core units 220 are installed one-to-one inside the winding frame 122.

[0043] Each winding frame 122 has a coil wound on it (not shown).

[0044] In some embodiments of this application, the supporting chassis 110 and the iron core support 120 are integrally molded structures, and the stator iron core 200 is integrally molded within the stator support 100.

[0045] During processing, the stator core 200 is first placed in the mold cavity and integrally formed into the stator support 100 by injection molding.

[0046] In other words, during processing, the stator core 200 is first placed in the mold cavity and integrally formed in the stator support 100 by hot runner plastic coating. Specifically, the stator core 200 is integrally formed in the core support 120.

[0047] The supporting chassis 110 and the iron core support frame 120 are integrally molded by injection molding, which has low manufacturing cost and high installation accuracy. The stator iron core 200 is integrally molded within the stator bracket 100. Compared with the steel plate forged bracket, it can significantly reduce the raw material cost, eliminate the production processes such as press-fitting and welding between the existing forged bracket and the stator iron core 200, and eliminate the existing insulating sheet installed between the stator iron core 200 and the coil, which greatly reduces the manufacturing cost of the motor and improves the production efficiency of the motor.

[0048] In some embodiments of this application, each winding frame 122 has an outer through portion 1221 formed on the outer wall opposite to the support chassis 110.

[0049] In some embodiments of this application, an inner through portion 1222 is formed on the inner wall of the support ring portion 121 near the support chassis 110.

[0050] The stator core 200 is in contact with the outside at the outer through-part 1221 and the inner through-part 1222, while the other parts are enclosed in the core support 120.

[0051] Refer again Figure 5 In some embodiments of this application, a positioning boss 112 is also provided at the center of the support chassis 110, and a main shaft 300 is provided on the positioning boss 112. The main shaft 300 is connected to the support chassis 110 by injection molding.

[0052] The spindle 300 is made of carbon steel to ensure the connection strength between the stator assembly and the motor housing or equipment body.

[0053] That is, during injection molding, the main shaft 300 is also connected and fixed to the support chassis 110 by injection molding.

[0054] During processing, the motor stator core 200 and main shaft 300 are pre-positioned and installed in the mold. Hot runner injection molding technology is used to integrate the stator core 200 and main shaft 300 with the stator bracket 100 to meet the requirements of temperature resistance and non-deformation of the stator bracket 100 under high temperature and high torque conditions of the motor.

[0055] The stator core 200 and stator bracket 100 are fixed to the motor housing via the main shaft 300, thereby achieving the connection and fixation between the stator assembly and the riding device.

[0056] In some embodiments of this application, a plurality of heat dissipation holes 111 are also provided at intervals along the periphery of the positioning boss 112 on the support chassis 110.

[0057] The heat dissipation hole 111 is used to dissipate heat outward during the operation of the motor.

[0058] In some embodiments of this application, the support chassis 110 is further provided with a plurality of reinforcing parts 114, and each reinforcing part 114 is radially distributed around the positioning boss 112.

[0059] The reinforcing part 114 is used to improve the structural strength of the supporting chassis 110 and prevent the supporting chassis 110 from deforming under stress.

[0060] Combination Figure 3 , Figure 7 In some embodiments of this application, a reinforcing disc 130 is also provided inside the supporting chassis 110, and the material of the reinforcing disc 130 is carbon structural steel.

[0061] Specifically, for example, but not limited to, the material of the reinforcing disc 130 is Q235 carbon steel. Q235 steel has both high strength and good plasticity and toughness. Its placement in the support base plate is beneficial to improving the structural strength of the support chassis 110.

[0062] That is, the reinforcing disc 130 is used to improve the overall structural strength of the support base plate and prevent the injection-molded support base 110 from deforming under stress.

[0063] Corresponding to the structure of the supporting chassis 110, in some embodiments of this application, the reinforcing disc 130 has mating holes 131 corresponding to each heat dissipation hole 111 and reinforcing ribs 132 corresponding to each reinforcing part 114.

[0064] In addition, fastening holes 113 are provided on the supporting chassis 110 and the reinforcing disc 130, and the fastening holes 113 are spaced along the periphery of the positioning boss 112.

[0065] The support chassis 110 is fixed to the motor housing by fastening bolts. That is, the fastening screws pass through the corresponding fastening holes 113, and the other end is fixed by fastening nuts, so as to realize the connection and fixation between the support chassis 110 and the motor housing.

[0066] The stator assembly involved in this application has a stator core 200 disposed within a core support frame 120. The core support frame 120 includes a support ring portion 121 and a winding frame 122. The inner connection portion 210 of the stator core 200 is located within the support ring portion 121, and the core unit 220 is disposed within the corresponding winding frame 122. The above-mentioned connection form between the stator core 200 and the core support frame 120 is beneficial to achieving the stability of the connection between the stator core 200 and the core support frame.

[0067] The stator core 200 and the main shaft 300 are pre-set in the mold cavity. During the injection molding process of the stator bracket 100, the stator core 200 and the main shaft 300 are integrally formed with the core support 120, which can significantly reduce the cost of raw materials and eliminate the existing production processes such as press-fitting and welding between the forged bracket and the stator core 200.

[0068] Whenever possible, the various aspects and features described and shown in the specification can be applied individually, and these individual aspects can serve as the subject of a divisional application.

[0069] In the description of the above embodiments, specific features, structures, materials, or characteristics may be combined in any suitable manner in one or more embodiments or examples.

[0070] The above are merely specific embodiments of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. A stator assembly characterized by, include: A stator core, comprising an annular inner connecting portion and core units circumferentially spaced on the outer wall of the inner connecting portion; A stator support includes a support chassis and a core support frame. The core support frame is annular and is disposed on the outer periphery of the support chassis. The core support frame includes a support ring portion and a plurality of winding frames formed on the periphery of the support ring portion. The stator core is disposed within the core support frame, the inner connecting part is disposed within the support ring part, and the core units are disposed one-to-one within the winding frame.

2. The stator assembly according to claim 1, characterized in that, The supporting chassis and the iron core support frame are integrally molded injection structures, and the stator iron core is integrally molded inside the iron core support frame.

3. The stator assembly according to claim 1, characterized in that, The center of the support chassis is provided with a positioning boss, and a main shaft is provided on the positioning boss. The main shaft is connected to the support chassis by injection molding.

4. The stator assembly according to claim 1, characterized in that, Each of the winding frames has an outer through-hole formed on the outer wall opposite to the supporting chassis.

5. The stator assembly according to claim 1, characterized in that, An inner through portion is formed on the inner wall of the support ring near the support chassis.

6. The stator assembly according to claim 3, characterized in that, The support chassis is also provided with multiple heat dissipation holes at intervals along the periphery of the positioning boss.

7. The stator assembly according to claim 6, characterized in that, The supporting chassis is also provided with multiple reinforcing parts, and each reinforcing part is radially distributed with the positioning boss as the center.

8. The stator assembly according to claim 7, characterized in that, The supporting chassis is also equipped with a reinforcing disc, which is made of carbon structural steel.

9. The stator assembly according to claim 8, characterized in that, The reinforcing disc has mating holes corresponding to each of the heat dissipation holes and reinforcing ribs corresponding to each of the reinforcing parts.

10. An electric machine characterized by Includes the stator assembly as described in any one of claims 1-9 above.

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