Motor with flange structure

Abstract

The utility model discloses a motor with a flange structure, which comprises a first shell, a second shell, a stator assembly, a rotor, a motor shaft and a bearing, and is characterized in that the stator assembly comprises a stator core and a stator winding; the first shell and the second shell are both made of plastic materials; the bottom of an inner cavity of the first shell is provided with a stator supporting table used for supporting the lower end face of the stator iron core, and the inner wall of the first shell is in close fit with the peripheral wall of the stator iron core. The lower end of the second shell is inserted into the inner cavity of the first shell and is tightly pressed on the upper end surface of the stator core, and the outer wall of the lower end of the second shell is tightly matched with the inner wall of the upper end of the first shell; a flange structure is arranged on the first shell and / or the second shell, and the flange structure and the first shell and / or the second shell are of an integrally-formed structure. According to the motor with the flange structure provided by the utility model, the flange and the motor shell are combined into a whole, so that one shell has multiple purposes, and the process is simple.

Description

Technical Field

[0001] The utility model relates to the technical field of motors, in particular to a motor with a flange structure. Background Art

[0002] Currently, motors with flange structures are widely used in the fan and water pump industries. However, there are two main types of existing flanged motors. One involves mounting an iron-cased or plastic-encapsulated motor on a flange, requiring additional assembly steps. The other involves placing the motor's stator into a mold and encapsulating the motor in one step during the flange encapsulation process. Because the stator is exposed to the high pressure and high temperature of the injection molding machine, this can easily cause deformation and damage to the stator's enameled wire, resulting in low product yields, poor consistency, and complex processes with high costs. Furthermore, since the stator is completely encapsulated in plastic, there's no way to effectively dissipate heat, causing the motor to heat up during operation and shortening its service life. Utility Model Content

[0003] In order to overcome the above-mentioned shortcomings of the prior art, the present invention provides a motor with a flange structure, which combines the flange and the motor housing into one body, can have the flange function, and has a simple process.

[0004] The technical solution adopted by the utility model to solve its technical problems is: a motor with a flange structure, comprising a first shell, a second shell, a stator assembly, a rotor, a motor shaft and bearings, the first shell and the second shell are respectively provided with bearing chambers for installing bearings, the motor shaft is passed through the shaft hole of the rotor, and both ends are installed in the bearing chambers through bearings, the rotor is arranged in the center of the stator assembly, and the stator assembly includes a stator core and a stator winding; the first shell and the second shell are both made of plastic; a stator support for supporting the lower end face of the stator core is provided at the bottom of the inner cavity of the first shell, and the inner wall of the first shell is tightly matched with the outer peripheral wall of the stator core; the lower end of the second shell is inserted into the inner cavity of the first shell and pressed against the upper end face of the stator core, and the lower end outer wall of the second shell is tightly matched with the upper end inner wall of the first shell; a flange structure is provided on the first shell and / or the second shell, and the flange structure and the first shell and / or the second shell are an integrally formed structure.

[0005] The present technical solution provides a motor with a flange structure, which utilizes one-piece molding to combine the flange and the motor housing into one, thereby realizing a multi-purpose shell. The shape of the flange can be either a windshield of a fan or a housing of a water pump as required. At the same time, the motor housing is composed of a first shell and a second shell made of plastic material, which can avoid damage to the stator winding, improve the qualified rate and consistency of the product, and has a simpler process, reduces the injection molding material, and can improve production efficiency and reduce costs. In addition, the stator assembly is fixed by the stator support and inner wall of the first shell, and the lower end of the second shell is pressed, so the concentricity is better, and there is no limit on the thickness of the stator core. The motor can use stator cores of different thicknesses, and has better versatility.

[0006] In a preferred technical solution, a first groove is vertically provided on the inner wall of the first housing, communicating with the stator support; a second groove is vertically provided on the outer wall of the second housing, and a notch is provided on the side wall of the second housing, which is pressed against the stator core at the lower end, communicating with the second groove. This technology utilizes the first groove to form a cold air inlet channel, while the second groove and notch form a hot air outlet channel, achieving air convection within the motor housing and forming a heat dissipation duct structure, thereby effectively dissipating heat from the motor and helping to extend the motor's service life.

[0007] In a preferred technical solution, multiple first grooves are uniformly arranged along the circumference of the inner wall of the first housing, and multiple second grooves are uniformly arranged along the circumference of the lower outer wall of the second housing. The first and second grooves are staggered, and adjacent first and second grooves are not coplanar. This technology further improves the heat dissipation effect of the motor housing by uniformly distributing multiple first and second grooves.

[0008] In a preferred technical solution, a fully or partially tight fit relationship is formed between the inner wall of the first shell and the outer peripheral wall of the stator core, so that the stator core is not easy to loosen, thereby ensuring the concentricity of the stator assembly and the first shell.

[0009] In a preferred technical solution, a fully tight fit or partially tight fit relationship is formed between the lower end outer wall of the second shell and the upper end inner wall of the first shell, so that the second shell is assembled more firmly and has high fitting accuracy, which can ensure the concentricity of the second shell and the first shell.

[0010] In a preferred technical solution, mounting ears are respectively provided on the first shell and the second shell, and the first shell is connected to the second shell via the mounting ears, so that the assembly is more secure.

[0011] In a preferred technical solution, the first shell and the second shell are fixedly connected by glue, and the glue connection is easy to operate and has low manufacturing cost.

[0012] In a preferred technical solution, fan blades are further provided on the motor shaft to achieve better heat dissipation effect.

[0013] In a preferred technical solution, the bearing chamber is made of metal or plastic. Among them, the metal bearing chamber is more durable and convenient for installing the bearing, while the plastic bearing chamber can be integrally formed with the first shell and the second shell, which is more convenient to manufacture.

[0014] In a preferred technical solution, both the first shell and the second shell are made of BMC material, which has good insulation, stable structure, low cost, and is suitable for mass production.

[0015] It can be seen from the above technical solution that compared with the prior art, the beneficial effects of the present invention are:

[0016] A motor with a flange structure, in which the flange and the motor housing are integrated into one body by one-piece molding, achieving multiple uses of one housing;

[0017] The motor housing is composed of a first shell and a second shell made of plastic, which can avoid damage to the stator winding, improve the product qualification rate and consistency, and simplify the process, reduce the injection molding materials, improve production efficiency and reduce costs;

[0018] At the same time, the stator assembly is fixedly installed by the support of the stator support of the first shell, the tight fit of the inner wall, and the pressing of the lower end of the second shell, which has better concentricity and does not limit the thickness of the stator core. The motor can use stator cores of different thicknesses, which has better versatility.

[0019] In addition, other advantages of the present invention will be given in the following description, and some will become apparent from the following description or be understood through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are merely embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0021] Figure 1 Schematic cross-section of a motor in an embodiment of the present invention;

[0022] Figure 2 This is an exploded view of the motor in the present utility model;

[0023] Figure 3 This is a schematic structural diagram of the first housing in an embodiment of the present utility model;

[0024] Figure 4 A perspective view of a motor in an embodiment of the present utility model;

[0025] Explanation of the accompanying drawings: 1. First shell; 2. Second shell; 3. Stator assembly; 4. Rotor; 5. Motor shaft; 6. Bearing; 7. Bearing chamber; 8. Stator support; 9. Flange structure; 10. Mounting ear; 31. Stator core; 32. Stator winding; 61. First bearing; 62. Second bearing; 71. First bearing chamber; 72. Second bearing chamber; 101. First groove; 201. Second groove; 202. Notch. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0027] In the description of the present invention, it should be understood that the terms "length," "width," "thickness," "up," "down," "front," "back," "left," "right," "vertical," "horizontal," "top," "bottom," "inside," "outside," and the like, indicating positions or relationships, are based on the positions or relationships shown in the accompanying drawings and are intended solely to facilitate the description of the present invention and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, in the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0028] Reference Figure 1-4 A motor with a flange structure according to an embodiment of the present invention is described.

[0029] In one embodiment, if Figure 1-4 As shown, a motor with a flange structure includes a first housing 1, a second housing 2, a stator assembly 3, a rotor 4, a motor shaft 5 and a bearing 6. The first housing 1 and the second housing 2 are respectively provided with a bearing chamber 7 for mounting the bearing 6. The motor shaft 5 is passed through the axial hole of the rotor 4, and both ends are mounted in the bearing chamber 7 through bearings 6. The rotor 4 is arranged at the center of the stator assembly 3. The stator assembly 3 includes a stator core 31 and a stator winding 32.

[0030] In which, the outer shell of the above-mentioned motor is composed of a first shell 1 and a second shell 2, and the first shell 1 and the second shell 2 are fixedly connected together; a first bearing chamber 71 is provided at the center of the first shell 1, and a second bearing chamber 72 is provided at the center of the second shell 2; the center line of the first bearing chamber 71 coincides with the center line of the inner cavity of the first shell 1, and the center line of the second bearing chamber 72 coincides with the center line of the inner cavity of the second shell 2, and the center line of the first bearing chamber 71 is coaxial with the center line of the second bearing chamber 72; a first bearing 61 and a second bearing 62 are respectively provided in the first bearing chamber 71 and the second bearing chamber 72, and the first bearing 61 and the second bearing 62 are respectively sleeved on both ends of the motor shaft 5, so that the motor shaft 5 can be rotatably arranged between the first shell 1 and the second shell 2, thereby ensuring the coaxiality of the stator assembly 3, the rotor 4 and the motor shaft 5.

[0031] The first shell 1 and the second shell 2 are both made of plastic.

[0032] The stator assembly 3 is disposed in the inner cavity of the first shell 1; a stator support 8 is provided at the bottom of the inner cavity of the first shell 1 for supporting the lower end surface of the stator core 31, and the inner wall of the first shell 1 is tightly matched with the outer peripheral wall of the stator core 31; the lower end of the second shell 2 is inserted into the inner cavity of the first shell 1 and pressed against the upper end surface of the stator core 31, and the lower end outer wall of the second shell 2 is tightly matched with the upper end inner wall of the first shell 1.

[0033] The stator core 31 is formed by stacking a large number of silicon steel sheets by pressure and adhesive, and the stator winding 32 is wound on the stator core 31 .

[0034] The first housing 1 can be a cylindrical housing with an open upper end, whose inner cavity constitutes an installation cavity for installing the stator assembly 3. The inner diameter of the stator support 8 is smaller than the outer diameter of the stator core 31 so as to support the lower end surface of the stator core 31 and prevent the stator core 31 from moving downward. At the same time, since the inner wall of the first housing 1 is tightly matched with the outer wall of the stator core 31, it can prevent the stator core 31 from moving left and right, ensuring that the center line of the stator assembly 3 is coaxial with the center line of the first bearing chamber 71 on the first housing 1, thereby obtaining better coaxiality.

[0035] The inner diameter of the lower end of the second shell 2 is smaller than the outer diameter of the stator core 31, and the height of the second shell 2 is greater than or equal to the distance from the upper end surface of the stator core 31 to the top surface of the first shell 1. This ensures that after the second shell 2 is inserted into the inner cavity of the first shell 1, its lower end can press the upper end surface of the stator core 31, thereby preventing the stator assembly 3 from moving upward. At the same time, the outer wall of the lower end of the second shell 2 and the inner wall of the upper end of the first shell 1 form a tight fit structure, which can serve as a guide and facilitate the pressing of the second shell 2 into the inner cavity of the first shell 1.

[0036] At the same time, since the structure of the motor is to fix the stator assembly 3 by pressing the silicon steel sheets of the stator core 31 at the lower end of the second shell 2, there is no limit on the thickness of the stator core 31. Therefore, the stator core 31 can be of different thicknesses, which is more versatile.

[0037] In specific implementation, if there are other models of motors and silicon steel sheets need to be added to the stator core 31, the second shell 2 can be used with different motors while ensuring that the second shell 2 extends into the inner cavity of the first shell 1 to a certain depth, can press the upper end surface of the stator core 31, and ensures that the various components of the motor are coaxial, thereby achieving multiple uses with one mold.

[0038] A flange structure 9 is provided on the first shell 1 and / or the second shell 2 , and the flange structure 9 and the first shell 1 and / or the second shell 2 are an integrally formed structure.

[0039] Among them, the flange structure 9 can be arranged on the first shell 1, or on the second shell 2, or on both the first shell 1 and the second shell 2. Moreover, the first shell 1, the second shell 2 and the flange structure 9 arranged thereon are an integrally formed structure to achieve multiple uses of one shell. In specific implementation, the integral forming process is usually achieved by injection molding. The shape of the flange can be either a windshield of a fan or a shell of a water pump as needed.

[0040] The above embodiment provides a motor with a flange structure, which uses one-piece molding to combine the flange structure 9 and the motor housing into one, thereby achieving multiple uses of one shell; the motor housing is composed of a first shell 1 and a second shell 2 made of plastic, which can avoid damage to the stator winding 32, improve the product's qualification rate and consistency, and the process is simpler, reducing the injection molding material, which can improve production efficiency and reduce costs.

[0041] In this embodiment, a first groove 101 communicating with the stator support 8 is provided on the inner wall of the first shell 1 in the vertical direction; a second groove 201 is provided on the outer wall of the second shell 2 in the vertical direction, and a notch 202 communicating with the second groove 201 is provided on the side wall of the lower end of the second shell 2 that presses the stator core 31.

[0042] Among them, a groove extending downward from the top edge is provided on the inner wall of the first shell 1, and a groove is also provided on the top of the stator support 8. The two grooves are connected to form a first groove 101. The upper end opening of the first groove 101 is located at the top edge of the first shell 1, and the lower end opening is located on the side of the stator support 8 and contacts the lower end surface of the stator core 31, so that a cold air channel can be formed on the outside of the stator assembly 3, and the cold air channel leads to the bottom surface of the stator core 31.

[0043] The upper opening of the second groove 201 is located at the top edge of the second shell 2, and the lower opening is connected to the notch 202 and contacts the upper end surface of the stator core 31. The second groove 201 and the notch 202 are connected to each other to form a hot air channel.

[0044] During specific implementation, the number of the first groove 101 and the second groove 201 is not limited and can be one or more; a sealed cavity is formed between the inner wall of the second shell 2 and the upper end surface of the stator core 31, which encloses the main heat source of the motor - the enameled wire in the stator winding 32. After the enameled wire is heated, the air density in the sealed cavity becomes smaller, forming a negative pressure, and cold air is sucked in through the cold air channel formed by the first groove 101. At the same time, the hot air generated when the motor is working is discharged through the hot air channel formed by the second groove 201 and the notch 202, forming air convection inside the motor, forming a heat dissipation duct structure, and improving the heat dissipation effect.

[0045] In this embodiment, a plurality of first grooves 101 are evenly arranged along the circumferential direction on the inner wall of the first shell 1, and a plurality of second grooves 201 are evenly arranged along the circumferential direction on the lower end outer wall of the second shell 2; the first grooves 101 and the second grooves 201 are staggered, and adjacent first grooves 101 and second grooves 201 are not on the same plane.

[0046] In specific implementation, in order to ensure the heat dissipation effect and the force balance of the motor, the first groove 101 and the second groove 201 can be two or more, and multiple first grooves 101 can be evenly distributed along the circumference on the inner wall of the first shell 1, and multiple second grooves 201 can be evenly distributed along the circumference on the outer wall of the second shell 2.

[0047] In this embodiment, a fully tight fit or a partially tight fit is formed between the inner wall of the first housing 1 and the outer peripheral wall of the stator core 31 .

[0048] During specific implementation, the inner wall of the first shell 1 and the outer peripheral wall of the stator core 31 are squeezed against each other to form a full or partial tight fit, so that the stator core 31 is not easy to loosen. At the same time, the fit accuracy is high, which can ensure the coaxiality of the stator assembly 3 and the first shell 1.

[0049] In this embodiment, a full tight fit or a partial tight fit is formed between the lower end outer wall of the second shell 2 and the upper end inner wall of the first shell 1 .

[0050] During specific implementation, the lower outer wall of the second shell 2 and the upper inner wall of the first shell 1 are squeezed against each other to form a full or partial tight fit, so that the second shell 2 is assembled more firmly and the fit accuracy is high, which can ensure the coaxiality of the second shell 2 and the first shell 1.

[0051] In this embodiment, mounting ears 10 are respectively provided on the first shell 1 and the second shell 2 , and the first shell 1 is connected to the second shell 2 via the mounting ears 10 .

[0052] The mounting ears 10 are respectively arranged on the edges of the first shell 1 and the second shell 2, and the mounting ears 10 of the two can be fixedly connected by screws and threaded rods, so that the first shell 1 and the second shell 2 are fixedly connected together to form the outer shell of the motor.

[0053] In this embodiment, the first shell 1 and the second shell 2 are fixedly connected by glue. The glue connection is easy to operate and has low manufacturing cost.

[0054] In this embodiment, fan blades are further provided on the motor shaft 5. In specific implementation, the fan blades can be provided on the upper side or the lower side of the rotor 4, so that the negative pressure in the air duct is stronger, further improving the heat dissipation effect.

[0055] In this embodiment, the bearing chamber 7 is made of metal or plastic.

[0056] The bearing chamber 7 includes a first bearing chamber 71 located at the center of the first housing 1 and a second bearing chamber 72 located at the center of the second housing 2 . Both the first bearing chamber 71 and the second bearing chamber 72 are made of metal or plastic.

[0057] In specific implementation, the bearing chamber 7 made of metal is more durable and is conducive to the installation of bearings, while the bearing chamber 7 made of plastic can be integrally formed with the first shell 1 and the second shell 2, which is more convenient to manufacture.

[0058] In this embodiment, both the first shell 1 and the second shell 2 are made of BMC material.

[0059] Among them, BMC (Bulk Molding Compound) refers to bulk molding compound, which is a material used to manufacture glass fiber reinforced thermosetting products. It has excellent electrical properties, mechanical properties, heat resistance and chemical corrosion resistance. It is used to manufacture the first shell 1 and the second shell 2. It has good insulation, stable structure, low cost, and is suitable for mass production.

[0060] Other structures and operations of the motor with a flange structure according to the embodiment of the present invention are known to those skilled in the art and will not be described in detail here.

[0061] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0062] In the description of this specification, the reference terms "embodiment", "specific embodiment", "example", etc. mean that the specific features, structures, materials or characteristics described in combination with the embodiment or example are included in at least one embodiment or example of the present invention.

[0063] In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined with each other in any suitable manner in any one or more embodiments or examples without interference or contradiction.

[0064] Materials or features may be combined with each other in any suitable manner in any one or more embodiments or examples without interference or inconsistency.

Claims

1. A motor with a flange structure, comprising a first housing (1), a second housing (2), a stator assembly (3), a rotor (4), a motor shaft (5) and a bearing (6), wherein the first housing (1) and the second housing (2) are respectively provided with a bearing chamber (7) for mounting the bearing (6), the motor shaft (5) is passed through an axial hole of the rotor (4), and both ends are mounted in the bearing chamber (7) through the bearing (6), the rotor (4) is arranged at the center of the stator assembly (3), and the stator assembly (3) includes a stator core (31) and a stator winding (32), characterized in that: The first shell (1) and the second shell (2) are both made of plastic; A stator support (8) for supporting the lower end surface of the stator core (31) is provided at the bottom of the inner cavity of the first shell (1), and the inner wall of the first shell (1) is tightly matched with the outer peripheral wall of the stator core (31); The lower end of the second shell (2) is inserted into the inner cavity of the first shell (1) and pressed against the upper end surface of the stator core (31), and the lower end outer wall of the second shell (2) is tightly matched with the upper end inner wall of the first shell (1); A flange structure (9) is provided on the first shell (1) and / or the second shell (2); the flange structure (9) and the first shell (1) and / or the second shell (2) are an integrally formed structure.

2. The motor according to claim 1, characterized in that: A first groove (101) communicating with the stator support (8) is provided on the inner wall of the first housing (1) in a vertical direction; A second groove (201) is provided on the outer wall of the second shell (2) in the vertical direction, and a notch (202) communicating with the second groove (201) is provided on the side wall of the lower end of the second shell (2) pressing against the stator core (31).

3. The motor according to claim 2, characterized in that: A plurality of the first grooves (101) are uniformly arranged on the inner wall of the first shell (1) along the circumferential direction, and a plurality of the second grooves (201) are uniformly arranged on the outer wall of the lower end of the second shell (2) along the circumferential direction; The first grooves (101) and the second grooves (201) are arranged alternately, and adjacent first grooves (101) and second grooves (201) are not on the same plane.

4. The motor according to claim 2, characterized in that: A fully tight fit or a partially tight fit relationship is formed between the inner wall of the first housing (1) and the outer peripheral wall of the stator core (31).

5. The motor according to claim 4, characterized in that: A full tight fit or a partial tight fit relationship is formed between the lower end outer wall of the second shell (2) and the upper end inner wall of the first shell (1).

6. The motor according to claim 2, characterized in that: The first shell (1) and the second shell (2) are respectively provided with mounting ears (10), and the first shell (1) is connected to the second shell (2) via the mounting ears (10).

7. The motor according to claim 2, characterized in that: The first shell (1) and the second shell (2) are fixedly connected by glue.

8. The motor according to any one of claims 2 to 7, characterized in that: The motor shaft (5) is also provided with fan blades.

9. The motor according to claim 2, characterized in that: The bearing chamber (7) is made of metal or plastic.

10. The motor according to claim 2, characterized in that: The first shell (1) and the second shell (2) are both made of BMC material.

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