Motor and air conditioner comprising same

Abstract

The utility model provides a motor comprising a stator assembly having an annular structure, the stator assembly comprising a stator core, a winding wound around the stator core; the rotor assembly is magnetically matched with the stator assembly and is provided with a rotating shaft; the first bearing and the second bearing are arranged on the rotating shaft at an interval; a terminal connected to the winding; the motor shell is of an injection molding integrated structure, the first end, in the axial direction, of the motor shell is open, the motor shell comprises a plastic package part, and the plastic package part wraps the annular outer surface and the two end faces of the stator assembly so as to be fixedly connected with the stator assembly; and the first cover is used for sealing and covering the motor shell at the first end of the motor shell. Wherein the first cover and the motor shell form a first cavity adjacent to the plastic package part, a driving plate used for operating the motor is installed in the first cavity, and the plastic package part further wraps at least part of the terminal to enable one end of the terminal to be exposed in the first cavity so as to be used for being connected with the driving plate.

Description

Technical Field

[0001] The present disclosure relates to the field of motors, and in particular to a motor. Background Art

[0002] Plastic-encapsulated motors usually use injection molding technology to encapsulate the stator core, windings, etc., which has the advantages of low cost, small size, and low noise. However, in the prior art, when encapsulating a plastic-encapsulated motor, the lead wires are first connected from the stator assembly and fixed with lead wire clamps, and then injection molded. The temperature during injection molding is high, and the lead wires need to experience high temperature and high pressure, so they must have temperature and pressure resistance, which undoubtedly increases the cost.

[0003] In addition, there is an increasing demand for built-in motor driver boards. However, in the prior art, there is often insufficient space in a plastic-encapsulated motor to accommodate the motor driver board, so the driver board can only be placed externally, which cannot meet the demand for built-in driver boards.

[0004] Plastic-encapsulated motors are generally used indoors, such as in household appliances such as range hoods, washing machines, air conditioners, and refrigerators, so they are not very waterproof or dustproof. In particular, for applications that are directly exposed to the outdoors, such as parking air conditioning motors, higher requirements are placed on the sealing performance of the motors. Utility Model Content

[0005] The purpose of the present disclosure is to at least solve the shortcomings existing in the prior art. The present disclosure proposes a motor, characterized in that it includes a stator assembly with an annular structure, the stator assembly includes a stator core and a winding wound around the stator core; a rotor assembly, which is used to magnetically cooperate with the stator assembly and has a rotating shaft; a first bearing and a second bearing, which are arranged on the rotating shaft at intervals; a terminal, which is connected to the winding; a motor housing, which is an injection-molded one-piece structure, the first end of the motor housing in the axial direction is open, the motor housing includes a plastic sealing portion, the plastic sealing portion covers the annular outer surface and two end faces of the stator assembly to be fixed to the stator assembly; a first cover, which seals the motor housing at the first end of the motor housing.

[0006] The first cover and the motor housing form a first chamber adjacent to the plastic sealing portion, a driving board for operating the motor is installed in the first chamber, and the plastic sealing portion also covers at least a portion of the terminal so that one end of the terminal is exposed in the first chamber for connection with the driving board.

[0007] For example, according to some embodiments of the present disclosure, the motor housing further includes a second cover for sealing a second end, the second end being opposite to the first end in an axial direction, the second cover being provided with a through hole along the axial direction, the through hole allowing the rotating shaft to pass through to extend out of the motor housing.

[0008] For example, according to some embodiments of the present disclosure, the second cover is further provided with a second chamber to accommodate a second bearing.

[0009] For example, according to some embodiments of the present disclosure, the second cover is further provided with a third chamber adjacent to the second chamber, and the third chamber is located between the second chamber and the through hole in the axial direction.

[0010] For example, according to some embodiments of the present disclosure, the third chamber is used to accommodate a seal, and the rotating shaft passes through the seal.

[0011] For example, according to some embodiments of the present disclosure, a size of a cross section of the third chamber perpendicular to the axial direction is smaller than a size of a cross section of the second chamber perpendicular to the axial direction.

[0012] For example, according to some embodiments of the present disclosure, the first cover is provided with a fourth cavity for accommodating the first bearing.

[0013] For example, according to some embodiments of the present disclosure, the first cover seals the motor housing by press-fitting.

[0014] For example, according to some embodiments of the present disclosure, the first cover and the motor housing are each provided with a first groove and a second groove at the mating position, and the first groove and the second groove cooperate to form a wire hole connected to the first chamber, and the motor also includes an input wire, which extends along the wire hole, one end of the input wire is connected to the drive board, and the other end extends out of the motor housing, and sealant is applied between the input wire and the wire hole.

[0015] For example, according to some embodiments of the present disclosure, thermal conductive adhesive is disposed between the first cover and the driving board.

[0016] For example, according to some embodiments of the present disclosure, the first cover and the motor housing are both structures integrally injection-molded by BMC material.

[0017] The present disclosure also provides an air conditioner, comprising any one of the above-mentioned motors, wherein the motor is used to drive a fan of the air conditioner.

[0018] For example, according to some embodiments of the present disclosure, the air conditioner is a parking air conditioner. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A schematic cross-sectional view of a motor according to an embodiment of the present disclosure is shown;

[0020] Figure 2 Show according to Figure 1 An exploded perspective schematic diagram of a motor;

[0021] Figure 3 A schematic cross-sectional view showing a motor housing and a stator assembly according to an embodiment of the present disclosure;

[0022] Figure 4 A perspective schematic diagram showing the appearance of a motor according to the present disclosure.

[0023] Reference numerals

[0024] 1 stator assembly,

[0025] 2 rotor assembly, 21 shaft, 221 first bearing, 222 second bearing

[0026] 3 motor housing, 31 plastic sealing part, 32 second cover, 33 protrusion, 331 first chamber, 332 second chamber, 333 third chamber, 341 first end, 342 second end, 35 through hole, 36 mounting foot

[0027] 4 first cover, 41 fourth chamber,

[0028] 51 terminal, 52 drive board, 53 seal, 54 input line, 55 sealant, 56 wire hole, 57 thermal conductive glue DETAILED DESCRIPTION

[0029] In order to make the purpose, scheme and advantages of the technical solution of the present disclosure clearer, the technical solution of the embodiment of the present disclosure will be clearly and completely described in conjunction with the drawings of the specific embodiments of the present disclosure. Unless otherwise specified, the terms used herein have the usual meanings in the art. The same reference numerals in the drawings represent the same components.

[0030] In the description of the present disclosure, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present disclosure can be understood according to specific circumstances.

[0031] For the convenience of explanation, in the present disclosure, the extending direction of the rotating shaft of the motor is designated as the axial direction.

[0032] Figure 1 A schematic cross-sectional view of a motor according to an embodiment of the present disclosure is shown; Figure 2 Show according to Figure 1 The exploded perspective diagram of the motor. Figure 1 and Figure 2The motor according to the present disclosure includes a stator assembly 1, a rotor assembly 2, a motor housing 3, and a first cover 4. The stator assembly 1 is fixed relative to the motor housing 3, for example, having an annular structure, and the stator assembly 1 includes a stator core (not shown) and a winding wound around the stator core. The rotor assembly 2 is installed to be pivotable relative to the motor housing, for example, by a first bearing 221 and a second bearing 222 to achieve the pivoting function, such as Figure 2 And the rotor assembly 2 is magnetically matched with the stator assembly 1, so that when the motor is running, the rotor assembly 2 can be pivoted by the magnetic force applied by the stator assembly 1.

[0033] The first cover 4 and the motor housing 3 form a sealed housing to accommodate most of the stator assembly 1 and the rotor assembly 2 (except for the protruding portion of the rotating shaft) therein, play a role in waterproofing and dustproofing, and provide protection.

[0034] Specifically, the motor housing is an injection-molded integral structure. During the injection molding, the wound stator assembly 1 is first placed in a mold, and a BMC material, such as a high-strength, long-glass-fiber BMC material, is injected. During the molding process, the BMC material coats the enameled wire and solidifies to form a mold, and the motor housing 2 wraps the stator to form an integral body, thereby forming the motor housing 2 and the stator assembly 1 as a whole. In particular, the motor housing 3 includes a plastic sealing portion 31, such as Figure 1 and Figure 3 As shown, the plastic sealing part 31 covers the annular outer surface and two end surfaces of the stator assembly 1 to be fixed with the stator assembly 1, so Figure 1 and Figure 3 In the cross-sectional view shown, the same shaded pattern is used to fill the two parts, and those skilled in the art can understand that these are two different parts that are simply consolidated into a whole.

[0035] This reduces the process of pressing the motor stator into the shell, saves the assembly process of the stator component, and simplifies the production process. In addition, BMC material is insulated to prevent leakage caused by cracked enameled wire. In addition, BMC material is also fireproof, explosion-proof, and corrosion-resistant, improving the overall safety of the motor.

[0036] The motor housing 3 may be open at both ends in the axial direction thereof, and may be sealed with two covers at both ends. However, in order to further increase the sealing performance and improve the waterproof and dustproof effect, the motor housing 3 according to the present disclosure may be open at only one end, and may be formed integrally with the cover at the other end. Specifically, as Figure 3 As shown, the motor housing 3 may include a first end 341 and a second end 342 that are opposite to each other in the axial direction. For example, the second end 342 may be closer to the stator assembly 1 than the first end 341. Figure 3As shown, the motor housing 3 is open at the first end 341 , which is sealed by a first cover, and at the second end 342 , a second cover 32 is provided, which is a part of the motor housing 3 and is also formed by integral injection molding.

[0037] In particular, the first cover can also be integrally molded by BMC material injection molding, and thus has the advantages of the above-mentioned BMC material. Furthermore, the first cover 4 can be sealed in the motor housing 3 by press-fitting, and the cover and the motor housing are assembled together by tight fitting without screws, which makes the installation process simple and fast, ensures the motor installation yield, and improves the motor waterproof and dustproof effect, which is particularly suitable for outdoor working environments. Figure 1 and Figure 2 As shown, the first cover 4 may also be provided with a fourth chamber 41 for accommodating the first bearing, so as to provide further support for the rotating shaft.

[0038] like Figure 1 As shown, the first cover 4 and the motor housing 3 form a first chamber 331 adjacent to the plastic sealing portion 31, and the first chamber is used to install a drive plate 52 for operating the motor, thereby realizing the built-in drive plate 52. In particular, as Figure 3 As shown, the motor housing 3 forms a recess adjacent to the plastic sealing portion 31, which provides the main volume of the first chamber 52, thereby reducing the manufacturing difficulty and volume of the first cover. The built-in drive setting makes the motor plug-and-play, convenient for users, and meets market demand.

[0039] In addition, although the BMC material used for plastic packaging has good mechanical and insulation properties, its heat dissipation performance is not good. In particular, when the driver board is built-in, the heat dissipation problem is more urgent to solve. According to the motor disclosed in the present invention, since the first cover and the driver board are arranged relatively close to each other, it is beneficial for the driver board to dissipate heat through the first cover.

[0040] Advantageously, a heat-conducting adhesive 57 may be provided between the first cover and the driving plate, such as Figure 1 As shown, better heat transfer is achieved to further facilitate heat dissipation.

[0041] In order to enable the drive board 52 to control the operation of the motor, the drive board 52 needs to be electrically connected to the stator assembly 1. However, in the prior art, when the plastic-encapsulated motor is plastic-encapsulated, the lead wire is first connected from the stator assembly, and fixed with a lead wire clamp, and then injection molded. The temperature is high during injection molding, and the lead wire needs to experience high temperature and high pressure, so it must have temperature and pressure resistance, which undoubtedly increases the cost. Therefore, the motor disclosed in the present invention improves it. Specifically, the motor disclosed in the present invention includes a plurality of terminals 51, and the two ends of the terminal 51 are respectively used to connect the winding wire of the stator assembly 1 and the drive board 52. The present disclosure proposes to insert the terminal 51 into the stator skeleton before winding the wire. The enameled wire at the end of the winding is first melted at a low temperature to expose the inner metal wire, and then the metal wire is pressed in the wire groove of the terminal, and finally the stator assembly is plastic-encapsulated. Without going through the lead wire plastic-encapsulation link, the lead wire clamp is saved and the production cost is reduced.

[0042] The resulting structure is Figure 3 As shown, the plastic sealing part 31 covers at least a portion of each terminal 51, so that one end of each terminal is exposed in the first cavity 331, so as to be connected to the driving board 51. Thus, the stator assembly 1 is first plastic sealed and then connected with the lead wire, and the lead wire does not go through the plastic sealing step, the requirements for the lead wire are reduced, and the lead wire clamp is not used, thereby reducing the cost.

[0043] Furthermore, the use environment of the plastic-encapsulated motor is generally indoors, for example, for household appliances such as range hoods, washing machines, air conditioners, refrigerators, etc., so its waterproof and dustproof effect is not good. In order to further improve the waterproof and dustproof performance, the motor according to the present disclosure also includes a seal 53.

[0044] Specifically, Figure 1 and 3 As shown, the motor according to the present disclosure may include a second chamber 332 and a third chamber 333, wherein the second chamber 332 is used to accommodate the second bearing and the third chamber is used to accommodate the seal. The motor according to the present disclosure may also include a protrusion 33, such as Figure 1 and Figure 2 As shown, the protrusion 33 is used to provide space for the second chamber 332 and the third chamber 333. A through hole 53 is provided on the protrusion 33 and penetrates in the axial direction. The through hole 53 allows the rotating shaft 21 to pass through and extend out of the motor housing 3, for example, to be connected to a load.

[0045] like Figure 3As shown, the third chamber 333 is located between the second chamber 332 and the through hole 53 in the axial direction, and in particular, the central axes of the three are colinear. Therefore, a seal 53, such as a sealing ring, is provided between the second bearing 222 and the through hole 53. The protruding part of the rotating shaft (i.e., the through hole) is the weak point of the sealing. The seal solves this problem and further improves the sealing performance of the motor. In addition, the seal also takes into account the role of adjusting the gasket. Since the rotor assembly 2 needs to be concentrically matched with the stator assembly 1, the matching is difficult and it is difficult to ensure the accuracy. The seal can just play the role of centering. When the rotating shaft passes through the seal, the stator assembly can be adjusted and guided, which is convenient for the assembly of the rotor assembly. Therefore, the structure of arranging the third chamber between the second chamber 332 and the through hole 53 to accommodate the seal is not only conducive to the introduction of the rotor assembly, but also has the effect of waterproofing and dustproofing.

[0046] Preferably, the size of the cross section of the third chamber 333 perpendicular to the axial direction may be smaller than the size of the cross section of the second chamber 332 perpendicular to the axial direction, that is, the diameter of the seal 53 is smaller than the diameter of the second bearing 222, which is beneficial to the positioning of the seal 53 and the second bearing 222, and is beneficial to further increase the sealing performance.

[0047] In addition, due to the built-in drive board 52, one or more input wires 54 are required to electrically and / or communicatively connect the drive board to the outside world. Therefore, a wire hole 56 is required to connect the outside world to the inside of the motor, for example, to connect the outside world to the first chamber 331. For example, Figure 4 As shown, the wire hole 56 of the motor according to the present disclosure is arranged at the mating interface between the first cover 4 and the motor housing 3. Specifically, the first cover 4 and the motor housing 3 are respectively provided with a first groove (not marked) and a second groove (not marked) at the mating position. For example, the first groove and the second groove are respectively a part of the complete wire hole 56. The shapes of the first groove and the second groove complement each other to form a complete wire hole connected to the first chamber 331. This arrangement facilitates the wiring of the input wire 54 without the need for perforation, thereby simplifying the assembly process.

[0048] In order to further improve the sealing performance of the motor, a sealant may be applied between the input wire 54 and the wire hole 56 to further improve the protection level of the motor and the waterproof and dustproof effect of the motor.

[0049] like Figure 4 As shown, the motor housing 3 also includes mounting feet 36 to facilitate the installation and fixation of the motor.

[0050] In addition, the present disclosure also relates to an air conditioner, comprising any of the above-mentioned motors, the motor being used to drive a fan of the air conditioner. In particular, the air conditioner is a parking air conditioner. Due to the excellent sealing performance of the motor of the present disclosure, the motor is particularly suitable for the application scenario of the parking air conditioner.

[0051] It should be understood that the above description is intended to illustrate rather than limit. For example, the above embodiments (and / or aspects thereof) can be used in combination with each other. In addition, without departing from the scope of the present disclosure, many modifications can be made to adapt specific situations or materials to the teachings of the present disclosure. The functions or performances of the various elements or modules described herein are only for illustration and are by no means restrictive, but are merely exemplary embodiments. After reading the above description, many other embodiments and modifications within the spirit and scope of the claims will be apparent to those skilled in the art. Therefore, the scope of the present disclosure should be determined with reference to the full scope of the equivalents given by the attached claims and these claims.

[0052] In the following claims, the terms “including” and “in which” are used as the plain-English equivalents of the respective terms “comprising” and “wherein.” Moreover, in the following claims, the terms “first,” “second,” and “third,” etc. are used merely as labels, and are not intended to impose numerical requirements on their objects.

Claims

1. A motor, characterized in that: include A stator assembly has an annular structure, the stator assembly comprising a stator core and a winding wound around the stator core. a rotor assembly, configured to magnetically cooperate with the stator assembly and having a rotating shaft, The first bearing and the second bearing are arranged on the rotating shaft at intervals. terminals, connected to the winding, The motor housing is an injection-molded integral structure, wherein the first end of the motor housing in the axial direction is open, and the motor housing comprises a plastic sealing portion, wherein the plastic sealing portion covers the annular outer surface and two end surfaces of the stator assembly to be fixed to the stator assembly. a first cover, covering the motor housing at a first end of the motor housing, The first cover and the motor housing form a first chamber adjacent to the plastic sealing portion, a driving board for operating the motor is installed in the first chamber, and the plastic sealing portion also covers at least a portion of the terminal so that one end of the terminal is exposed in the first chamber for connection with the driving board.

2. The motor according to claim 1, characterized in that The motor housing further comprises a second cover for sealing a second end, the second end being opposite to the first end in the axial direction, and the second cover is provided with a through hole in the axial direction, the through hole allowing the rotating shaft to pass through and extend out of the motor housing.

3. The motor according to claim 2, characterized in that The second cover is also provided with a second chamber to accommodate a second bearing.

4. The motor according to claim 3, characterized in that The second cover is further provided with a third chamber adjacent to the second chamber, and the third chamber is located between the second chamber and the through hole in the axial direction.

5. The motor according to claim 4, characterized in that The third chamber is used to accommodate a sealing member, and the rotating shaft passes through the sealing member.

6. The motor according to claim 5, characterized in that A size of a cross section of the third chamber perpendicular to the axial direction is smaller than a size of a cross section of the second chamber perpendicular to the axial direction.

7. The motor according to any one of claims 1 to 6, characterized in that: The first cover is provided with a fourth cavity for accommodating the first bearing.

8. The motor according to any one of claims 1 to 6, characterized in that: The first cover seals the motor housing by press-fitting.

9. The motor according to any one of claims 1 to 6, characterized in that: The first cover and the motor housing are respectively provided with a first groove and a second groove at the mutually matching position, and the first groove and the second groove cooperate to form a wire hole connected to the first chamber. The motor further comprises an input line extending along the wire hole, one end of the input line is connected to the driving board, and the other end extends out of the motor housing, and sealant is applied between the input line and the wire hole.

10. The motor according to any one of claims 1 to 6, characterized in that: Heat-conducting glue is arranged between the first cover and the driving board.

11. The motor according to any one of claims 1 to 6, characterized in that: The first cover and the motor housing are both integrally injection-molded structures using BMC materials.

12. An air conditioner, characterized in that: The invention comprises the motor according to any one of claims 1 to 11, wherein the motor is used to drive a fan of the air conditioner.

13. The air conditioner according to claim 12, characterized in that: The air conditioner is a parking air conditioner.

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