Motor and air conditioner comprising same

Abstract

A motor (100) and an air conditioner comprising same. The motor comprises a rotor assembly (5), a stator assembly (4), a plastic housing (1), and a bearing end cover (7). The stator assembly (4) is located on the radial outer side of the rotor assembly (5). The plastic housing (1) is arranged outside the stator assembly (4), the plastic housing (1) and the stator assembly (4) are integrally formed, the plastic housing (1) comprises a body (11) and a matching portion (12) protruding from the axial end face of the body (11), and the matching portion (12) is arranged on the radial inner side of the body (11). The bearing end cover (7) comprises a cover body (71), the cover body (71) is located in the matching portion (12), and the outer peripheral wall of the cover body (71) and the inner peripheral wall of the matching portion (12) work in conjunction to block the space in the matching portion (12).

Description

Motor and air conditioner with same

[0001] Cross-reference to related applications

[0002] The present application is based on Chinese Patent Application No. 202411133869.3, 202422001485.8, filed on August 16, 2024, and claims priority to the Chinese Patent Application No. 202411133869.3, 202422001485.8, filed on August 16, 2024, the contents of which are incorporated herein by reference in their entirety. TECHNICAL FIELD

[0003] The present application relates to the technical field of motors, and in particular to a motor and an air conditioner with the same. BACKGROUND

[0004] In related technologies, as an important device for converting electrical energy into mechanical energy, a motor plays a key role in many fields such as compressors, refrigeration equipment, household appliances, etc. A plastic package is generally provided on the motor to play an insulating and protective role, and a mounting structure is provided on the plastic package. However, the overall manufacturing cost of the motor is relatively high, and the weight is relatively heavy.

[0005] SUMMARY

[0006] The present application aims to at least solve one of the technical problems existing in the prior art. To this end, the present application provides a motor, which has a relatively low manufacturing cost and a relatively light weight.

[0007] The present application also provides an air conditioner, which comprises the above motor.

[0008] According to the motor of the present application, the motor comprises a rotor assembly, a stator assembly, a plastic package and a bearing end cover. The stator assembly is located radially outward of the rotor assembly. The plastic package is provided outside the stator assembly and is integrally formed with the stator assembly. The plastic package comprises a body and a matching portion protruding from an axial end surface of the body. The matching portion is located radially inward of the body. The bearing end cover comprises a cover body, which is located inside the matching portion. An outer peripheral wall of the cover body cooperates with an inner peripheral wall of the matching portion to seal a space inside the matching portion.

[0009] According to the motor of the embodiment of the present application, the outer peripheral wall of the cover body of the bearing end cover is matched with the inner peripheral wall of the matching portion of the plastic-encased shell to seal the space in the matching portion, so that the bearing end cover can better protect the stator assembly and the bearing arranged in the plastic-encased shell, and avoid dust, liquid, oil and other impurities from entering the interior of the stator assembly or the interior of the bearing, thereby prolonging the service life of the motor. In addition, the bearing end cover is arranged on the radial outer side of the matching portion, and the outer peripheral wall of the cover body is matched with the inner peripheral wall of the matching portion, so that the material consumption of the matching portion is less when the wall thickness of the matching portion is the same, the mass of the matching portion can be reduced, and the manufacturing cost of the matching portion is reduced. At the same time, the diameter of the outer peripheral wall of the cover body of the bearing end cover matched with the matching portion is small, and the material consumption of the bearing end cover is also less, thereby reducing the manufacturing cost of the bearing end cover, and realizing the cost reduction of the material of the plastic-encased shell.

[0010] In addition, the motor according to the present application can also have the following additional technical features:

[0011] In some embodiments of the present application, the bearing end cover further comprises a flange, the flange is arranged on the outer periphery of the cover body, and the flange is located on the side of the matching portion away from the body and is attached to the axial end face of the matching portion away from the body.

[0012] In some embodiments of the present application, a fillet is arranged between the outer peripheral wall of the matching portion and the axial end face of the body facing the matching portion; and / or, in the direction from the matching portion to the body, the outer peripheral wall of the matching portion is inclined toward the direction away from the axis of the matching portion.

[0013] In some embodiments of the present application, the plastic-encased shell further comprises mounting ears, the mounting ears are arranged on the outer peripheral wall of the body, the mounting ears are spaced apart along the circumferential direction of the body, and the mounting ears have mounting holes axially penetrating through the mounting ears.

[0014] In some embodiments of the present application, the side surface of the mounting ear along the axial direction of the body is a mounting surface and is flush with the axial end face on the same side of the body, and in the direction radially outward of the body, the side surface of the mounting ear away from the mounting surface is inclined toward the mounting surface.

[0015] In some embodiments of the present application, the plastic-encased shell further comprises a lead wire portion, the matching portion and the lead wire portion are arranged on the same axial end face of the body, the lead wire portion is located radially outward of the matching portion, and the plastic-encased shell further comprises a lead pin, the lead pin is arranged on the lead wire portion along the axial direction of the body, and is used to connect a power line and a winding wire of the stator assembly.

[0016] In some embodiments of the present application, the side of the lead-out wire portion away from the body is provided with a first stopper extending along the edge of the lead-out wire portion, the lead-out pin is located inside the first stopper, and the side of the first stopper away from the body axis has an opening for the lead-out of the power line.

[0017] In some embodiments of the present application, the plastic-encased shell further comprises a cover plate arranged on the side of the lead-out wire portion away from the body, the side of the cover plate facing the lead-out wire portion is provided with a second stopper extending along the edge of the cover plate and located outside the first stopper and abutting the peripheral wall of the first stopper.

[0018] In some embodiments of the present application, the side of the lead-out wire portion away from the body is provided with a wire groove arranged adjacent to the opening and having one end in communication with the opening and the other end extending towards the lead-out pin, and the part of the power line is adapted to be located in the wire groove.

[0019] In some embodiments of the present application, the side of the lead-out wire portion away from the body is provided with a water-blocking boss extending along the width direction of the opening and arranged in the radial direction of the body and spaced apart from the opening.

[0020] The air conditioner according to the embodiments of the present application comprises the motor described above.

[0021] According to the air conditioner of the embodiments of the present application, the outer peripheral wall of the cover body of the bearing end cover is matched with the inner peripheral wall of the matching portion of the plastic-encased shell to seal the space in the matching portion, so that the stator assembly and the bearing arranged in the plastic-encased shell can be better protected, and dust, liquid, oil and other impurities are prevented from entering the inside of the stator assembly or the inside of the bearing, thereby prolonging the service life of the motor. In addition, compared with the bearing end cover being arranged on the radial outer side of the matching portion, the matching of the outer peripheral wall of the cover body of the bearing end cover with the inner peripheral wall of the matching portion makes the wall thickness of the matching portion be the same, and the amount of material of the matching portion is less, so that the mass of the matching portion can be reduced, and the manufacturing cost of the matching portion is reduced. At the same time, the diameter of the outer peripheral wall of the cover body of the bearing end cover matched with the matching portion is smaller, and the amount of material required by the bearing end cover is also less, thereby reducing the manufacturing cost of the bearing end cover, and the cost of the material of the plastic-encased shell is reduced.

[0022] Additional aspects and advantages of the present application will be in part apparent and in part pointed out hereinafter. BRIEF DESCRIPTION OF DRAWINGS

[0023] The above and / or additional aspects and advantages of the present application will become apparent and be readily appreciated from the following description, including the appended drawings.

[0024] Fig. 1 is a sectional view of an electric machine according to an embodiment of the present application;

[0025] Fig. 2 is an enlarged view of A in Fig. 1;

[0026] Fig. 3 is an enlarged view of B in Fig. 1;

[0027] Fig. 4 is a front view of a stator assembly according to an embodiment of the present application;

[0028] Fig. 5 is a front view of a stator assembly according to an embodiment of the present application, with a cover removed;

[0029] Fig. 6 is a rear view of an electric machine according to an embodiment of the present application, from another angle.

[0030] Reference Signs:

[0031] 100, electric machine;

[0032] 1, plastic-encased shell; 11, body; 12, mating portion; 13, lead portion; 131, first stop; 132, opening; 133, wire slot; 134, positioning protrusion; 135, water-blocking boss; 14, mounting ear; 141, mounting surface; 142, mounting hole; 143, notch; 144, first slot; 145, second slot;

[0033] 2, lead pin;

[0034] 3, cover; 31, second stop; 32, stop protrusion;

[0035] 200, stator assembly;

[0036] 4, stator component;

[0037] 5, rotor component; 51, rotor core; 52, rotor magnet;

[0038] 6, shaft;

[0039] 7, bearing end cover; 71, cover body; 72, flange; 73, rounded corner; 74, reinforcing rib; 741, first reinforcing rib; 742, second reinforcing rib. Embodiments of the present application

[0040] Embodiments of the present application are described in detail below with reference to the attached drawings, wherein the same or like reference numerals are used to represent the same or similar elements throughout. The embodiments described below are exemplary only, and are not intended to be limiting of the present application.

[0041] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0042] In addition, the terms "first", "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise explicitly specified and limited.

[0043] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood broadly, for example, it can be fixed connection, or detachable connection, or integral; it can be mechanical connection, or electrical connection, or communication; it can be directly connected, or indirectly connected through intermediate medium, or the communication between two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0044] The motor 100 according to the embodiments of the present application is described below with reference to the drawings.

[0045] As shown in FIG. 1, the motor 100 according to the embodiments of the present application comprises a rotor assembly 5, a stator assembly 4, a plastic-encased shell 1 and a bearing end cover 7.

[0046] Specifically, as shown in FIG. 1, the plastic-encased shell 1 comprises a body 11 and a fitting portion 12 protruding from the body 11, the stator assembly 4 is located radially outward of the rotor assembly 5, the rotor assembly 5 is rotatably arranged in the stator assembly 4, a rotating shaft 6 is arranged in the rotor assembly 5 and connected with the rotor assembly 5, and one end of the rotating shaft 6 extends out from the side of the body 11 away from the fitting portion 12. The rotor assembly 5 comprises a rotor core 51 and a rotor magnet 52, the rotor magnet 52 can be a permanent magnet or an electromagnet, the stator assembly 4 can generate a rotating magnetic field after being energized, the rotor magnet 52 can respond to the rotating magnetic field generated by the stator assembly 4 to generate a magnetic force, so as to rotate the rotor core 51 and provide a torque to drive the rotating shaft 6 to rotate.

[0047] The stator assembly 4 comprises a stator core and a stator winding, the stator winding is wound on the stator core, and the stator core can generate a rotating magnetic field when the stator winding is powered.

[0048] The plastic-encased shell 1 is arranged outside the stator assembly 4 and is integrally formed with the stator assembly 4, and the plastic-encased shell 1 and the stator assembly 4 form a stator assembly 200. The stator assembly 4 is arranged in the plastic-encased shell 1, and the plastic-encased shell 1 can be formed by covering the stator assembly 4 with an insulating material through a process such as injection molding. The plastic-encased shell 1 has an insulating and protective effect, can enhance the mechanical strength of the stator assembly 200, and improve the electrical performance and safety of the stator assembly 200.

[0049] Further, as shown in FIG. 1, the plastic-encased shell 1 comprises a body 11 and a fitting portion 12 protruding from the body 11, the fitting portion 12 is arranged on the radially inner side of the body 11 and is used to cooperate with the bearing end cover 7.

[0050] Further, as shown in FIG. 1 and FIG. 3, the bearing end cover 7 comprises a cover body 71, the cover body 71 is located in the fitting portion 12, and the outer peripheral wall of the cover body 71 cooperates with the inner peripheral wall of the fitting portion 12 to block the space in the fitting portion 12. The bearing end cover 7 can better protect the bearing and other components arranged in the plastic-encased shell 1, avoid dust, liquid, oil and other impurities from entering the inside of the bearing and other components, protect the bearing and other components from the external environment, help to reduce the wear and corrosion inside the bearing and other components, thereby prolonging the service life of the stator assembly 200.

[0051] It can be understood that the region of the fitting portion 12 that cooperates with the cover body 71 is provided with a fitting stopper for cooperating with the cover body 71. The bearing end cover 7 is arranged on the radially outer side of the fitting portion 12, and the outer peripheral wall of the cover body 71 cooperates with the inner peripheral wall of the fitting portion 12 so that the fitting stopper is arranged on the inner peripheral wall of the fitting portion 12. When the wall thickness of the fitting portion 12 is the same, the amount of material of the fitting stopper is less, which can reduce the mass of the fitting portion 12 and reduce the manufacturing cost of the fitting portion 12. At the same time, the diameter of the outer peripheral wall of the cover body 71 of the bearing end cover 7 that cooperates with the fitting portion 12 is smaller, and the amount of material required by the bearing end cover 7 is also less, which reduces the manufacturing cost of the bearing end cover 7, thereby realizing the cost reduction of the material of the plastic-encased shell 1.

[0052] According to the motor 100 of the embodiment of the present application, the outer peripheral wall of the cover body 71 of the bearing end cover 7 is matched with the inner peripheral wall of the matching portion 12 of the plastic-encased shell 1 to seal the space in the matching portion 12, so that the bearing end cover 7 can better protect the stator assembly 4 and the bearing arranged in the plastic-encased shell 1, and avoid dust, liquid, oil and other impurities from entering the inside of the stator assembly 4 or the inside of the bearing, thereby prolonging the service life of the motor 100. In addition, the bearing end cover 7 is arranged on the radial outer side of the matching portion 12, and the outer peripheral wall of the cover body 71 is matched with the inner peripheral wall of the matching portion 12, so that when the wall thickness of the matching portion 12 is the same, the amount of material of the matching portion 12 is less, the mass of the matching portion 12 can be reduced, and the manufacturing cost of the matching portion 12 is reduced. At the same time, the diameter of the outer peripheral wall of the cover body 71 of the bearing end cover 7 matched with the matching portion 12 is small, and the amount of material required by the bearing end cover 7 is also less, thereby reducing the manufacturing cost of the bearing end cover 7, and realizing the cost reduction of the material of the plastic-encased shell 1.

[0053] In the embodiment, the plastic-encased shell 1 and the bearing end cover 7 are made of plastic material, for example, BMC (Bulk Molding Compound, thermosetting bulk molding compound).

[0054] In some embodiments of the present application, as shown in FIGS. 1 and 3, the bearing end cover 7 further includes a flange 72 arranged on the outer periphery of the cover body 71, the flange 72 is located on the side of the matching portion 12 away from the body 11 and is attached to the axial end surface of the matching portion 12 away from the body 11, the flange 72 can limit the position of the cover body 71, and after the cover body 71 is extended into the selected position in the matching portion 12, the bearing end cover 7 can be prevented from completely entering the matching portion 12, so that the matching position of the cover body 71 is more reliable.

[0055] In some embodiments of the present application, as shown in FIGS. 1 and 3, a round corner 73 is arranged between the outer peripheral wall of the matching portion 12 and the axial end surface of the body 11 facing the matching portion 12, which can increase the connection wall thickness of the connection position of the matching portion 12 and the body 11, improve the connection strength of the connection position of the matching portion 12 and the body 11, avoid stress concentration at the connection position of the matching portion 12 and the body 11 under stress, and avoid causing the connection position of the matching portion 12 and the body 11 to break.

[0056] In some embodiments of the present application, as shown in FIG. 1 and FIG. 3, in the direction (a direction shown in FIG. 1) of the fitting portion 12 to the body 11, the outer peripheral wall of the fitting portion 12 is inclined towards the direction away from the axis of the fitting portion 12. The wall thickness of the fitting portion 12 close to the body 11 is large, which can ensure the connection strength of the connection position of the fitting portion 12 and the body 11, avoid stress concentration at the connection position of the fitting portion 12 and the body 11 under stress, and avoid causing the connection position of the fitting portion 12 and the body 11 to break. The outer peripheral wall of the fitting portion 12 away from the body 11 has a small size, which can reduce the radial space occupied by the fitting portion 12.

[0057] In some embodiments of the present application, as shown in FIG. 1, FIG. 4, FIG. 5 and FIG. 6, the plastic-encased shell 1 further comprises mounting ears 14, which are arranged on the outer peripheral wall of the body 11 and are used for fixing and mounting. The mounting ears 14 are spaced apart in the circumferential direction of the body 11. The plurality of mounting ears 14 can form multiple mounting positions in the circumferential direction of the body 11, so that the stator assembly 200 provided with the plastic-encased shell 1 can be fixed and mounted at multiple positions in the circumferential direction of the body 11, thereby enhancing the connection stability between the stator assembly 200 and the connected member. At the same time, the stress between the plastic-encased shell 1 and the connected member can be dispersed to the plurality of mounting ears 14, thereby reducing the stress generated by each mounting ear 14, reducing the risk of damage to the mounting ear 14, and prolonging the service life of the plastic-encased shell 1.

[0058] In some embodiments of the present application, as shown in FIG. 6, the mounting ears 14 have mounting holes 142 that penetrate the mounting ears 14 in the axial direction of the body 11. The mounting holes 142 are used for fixing and mounting, and have a reasonable structure design, which can reduce the installation difficulty and cost. The operator only needs to fix according to the position of the mounting hole 142, and at the same time, the mounting hole 142 can ensure that the mounting member such as a fastener is firmly fixed at the mounting position, reducing the risk of damage caused by vibration or impact. For example, the operator can pass a fastener such as a bolt through the mounting hole 142 to complete the fixing of the stator assembly 200 provided with the plastic-encased shell 1, and then complete the fixing and mounting of the motor 100 containing the stator assembly 200.

[0059] In some embodiments of the present application, as shown in FIG. 6, the mounting hole 142 has a notch 143 at the end of the mounting lug 14 away from the body 11. The notch 143 is simple in structure, easy to implement and low in cost, and can provide convenience for mounting and dismounting. The operator can put or take out the fasteners such as from the notch 143 into or out of the mounting hole 142, reducing the operation difficulty of mounting and dismounting, thereby improving the efficiency of mounting and dismounting. On the other hand, the notch 143 can reduce the weight of the plastic-encased shell 1 without affecting the structural strength of the mounting lug 14, thereby facilitating the transportation and installation of the plastic-encased shell 1 and the stator assembly 200.

[0060] In some embodiments of the present application, as shown in FIGS. 4 and 5, the side surface of the mounting lug 14 along the axial direction of the body 11 (the a direction shown in FIG. 1) is a mounting surface 141 and flush with the axial end surface on the same side of the body 11. It can be understood that when the stator assembly 200 provided with the plastic-encased shell 1 is used for the motor 100, the mounting lug 14 provided on the outer peripheral wall of the body 11 can provide convenience for the fixation and installation of the motor 100. As shown in the examples of FIGS. 4 and 5, along the axial direction of the body 11, the axial end surface on the same side of the body 11 as the mounting surface 141 of the mounting lug 14 is specifically a first end surface, which is flush with the mounting surface 141.

[0061] In some embodiments of the present application, as shown in FIGS. 4 and 5, by setting the mounting surface 141 of the mounting lug 14 to be flush with the axial end surface on the same side of the body 11, i.e., the mounting surface 141 and the axial end surface on the same side of the body 11 are a smooth plane without protrusions, corners or other structures, compared with the mounting surface 141 of the mounting lug 14 being spaced apart from the axial end surface on the same side of the body 11, the stress of the mounting lug 14 can be effectively reduced, and the risk of stress concentration at the mounting lug 14 during installation can be reduced, thereby improving the safety and reliability of the structure of the mounting lug 14 and prolonging the service life thereof, thereby improving the structural stability and service life of the plastic-encased shell 1. At the same time, under the same stress requirement, when the mounting surface 141 of the mounting lug 14 is flush with the axial end surface on the same side of the body 11, the thickness of the mounting lug 14 along the axial direction of the body 11 can be reduced, thereby reducing the material usage of the mounting lug 14, and further reducing the manufacturing cost of the plastic-encased shell 1.

[0062] In some embodiments of the present application, in the direction radially outward of the body 11 (the c direction shown in FIG. 5), the side surface of the mounting lug 14 away from the mounting surface 141 is inclined toward the mounting surface 141. In the direction radially inward of the body 11, the thickness of the mounting lug 14 along the axial direction of the body 11 gradually increases, and the structural strength of the mounting lug 14 close to the body 11 gradually increases, thereby enhancing the connection strength between the mounting lug 14 and the body 11, thereby improving the structural stability and reliability of the plastic-encased shell 1 and prolonging the service life thereof.

[0063] In some embodiments of the present application, as shown in FIG. 1 and FIG. 4, the mounting ear 14 is located at one end of the body 11 in the axial direction, and the surface of the mounting ear 14 away from the other end of the body 11 in the axial direction is the mounting surface 141. In this way, the mounting surface 141 of the mounting ear 14 is flush with the axial end surface on the same side of the body 11, the structure is reasonable and easy to process, and the risk of stress concentration at the mounting ear 14 can be effectively reduced during installation, which can improve the safety and reliability of the structure of the mounting ear 14 and prolong its service life, thereby improving the structural stability and service life of the plastic-encased shell 1. For example, as shown in the examples of FIG. 1 and FIG. 4, the mounting ear 14 is arranged at one end of the body 11 close to the first end surface in the axial direction, and the surface of the mounting ear 14 close to the first end surface is the mounting surface 141, which is flush with the first end surface.

[0064] In some embodiments of the present application, as shown in FIG. 6, the side surface of the mounting ear 14 away from the mounting surface 141 has a first groove 144, and the mounting hole 142 penetrates the bottom wall of the first groove 144 and is arranged spaced apart from the side wall of the first groove 144. The first groove 144 can serve as a limiting and positioning function, further facilitating installation at the mounting ear 14. During installation, the first groove 144 can be used as a positioning reference, cooperating with installation components such as gaskets, bolts, etc., which helps to reduce installation errors and reduce the difficulty of operation for the operator, thereby improving installation efficiency and installation quality.

[0065] In some embodiments of the present application, as shown in FIG. 6, the side surface of the mounting ear 14 away from the mounting surface 141 has a second groove 145, and the second groove 145 is in communication with the first groove 144 and located on the side of the first groove 144 close to the body 11. The arrangement position of the second groove 145 does not affect the fixed connection of the mounting ear 14, nor is it a key position affecting the structural strength of the mounting ear 14, so that the weight of the plastic-encased shell 1 can be reduced without affecting the structural strength of the mounting ear 14, facilitating transportation and installation. At the same time, the material usage of the plastic-encased shell 1 can be reduced, thereby effectively reducing the manufacturing cost of the plastic-encased shell 1.

[0066] In some embodiments of the present application, as shown in FIG. 1, FIG. 2 and FIG. 5, the plastic-encased shell 1 further comprises a lead-out portion 13, the fitting portion 12 and the lead-out portion 13 are arranged on the same end surface of the body 11 in the axial direction of the body 11, the lead-out portion 13 is located radially outward of the fitting portion 12, the plastic-encased shell 1 further comprises a lead-out pin 2, the lead-out pin 2 is arranged on the lead-out portion 13 in the axial direction of the body 11 and is used to connect the power supply wire and the winding wire of the stator assembly 200, wherein the power supply wire is connected to one end of the lead-out pin 2 away from the stator assembly 4, and the winding wire of the stator assembly 200 is connected to one end of the lead-out pin 2 towards the stator assembly 4, so that the plastic-encased shell 1 does not need to be injection molded together with the power supply wire, thereby improving the manufacturability of the plastic-encased shell 1, reducing the failure rate of the plastic-encased shell 1, reducing the difficulty of the plastic-encased shell 1, and improving the injection molding efficiency of the plastic-encased shell 1.

[0067] It can be understood that by arranging the lead-out portion 13 radially outward of the fitting portion 12 and connecting the power supply wire and the winding wire of the stator assembly 200 through the lead-out pin 2, the power supply wire can be externally arranged, on the one hand, the power supply wire is away from the gap between the stator assembly 4 and the rotor assembly 5, the power supply wire is isolated from the cavity defined by the body 11, the risk of scratching between the power supply wire and the rotor assembly 5 is reduced, and the additional design of sleeving a heat-shrinkable tube on the power supply wire or designing a wire blocking column on the plastic-encased shell 1 in the prior art is avoided, thereby reducing the production and processing cost of the plastic-encased shell 1; on the other hand, the soldering tin flying everywhere into the cavity defined by the body 11 when connecting the power supply wire can be avoided, the problem of blockage or the need for additional cleaning of the soldering tin can be avoided, thereby ensuring the normal operation of the motor 100 and reducing the production and processing cost and maintenance cost of the motor 100.

[0068] In some embodiments of the present application, as shown in FIG. 1, FIG. 2 and FIG. 5, the side of the lead-out portion 13 away from the body 11 is provided with a first stop 131, the first stop 131 extends along the edge of the lead-out portion 13, the lead-out pin 2 is located inside the first stop 131, the first stop 131 can protect the lead-out pin 2 to some extent, the side of the first stop 131 away from the axis of the body 11 has an opening 132 for the power supply wire to lead out, so that the power supply wire can lead out in the radial direction of the body 11 instead of in the axial direction of the body 11, which can relatively reduce the occupation of the axial space of the plastic-encased shell 1 by the power supply wire, and facilitate the structural layout inside the plastic-encased shell 1.

[0069] In further embodiments of the present application, as shown in FIG. 1, FIG. 2 and FIG. 5, the plastic shell 1 further comprises a cover plate 3, which is arranged on the side of the lead-out wire portion 13 away from the body 11, and the cover plate 3 and the lead-out wire portion 13 jointly define a placement space in which the lead-out pin 2 and part of the power cord are located, so that the cover plate 3 can protect the lead-out pin 2 and the power cord. Further, referring to FIG. 2, the side of the cover plate 3 facing the lead-out wire portion 13 is provided with a second stop 31, which extends along the edge of the cover plate 3 and is located outside the first stop 131 and abuts the outer wall of the first stop 131. Through the cooperation of the first stop 131 and the second stop 31, the cover plate 3 can be prevented from being misaligned or having a gap during assembly, ensuring the accuracy and stability of the assembly of the cover plate 3 and the lead-out wire portion 13, and to some extent preventing dust or other impurities from entering the placement space, avoiding the influence of dust or other impurities on the normal connection of the lead-out pin 2 and the power cord.

[0070] It should be noted that the second stop 31 is located outside the first stop 131, which can better protect the lead-out wire portion 13, and avoid reducing the placement space jointly defined by the lead-out wire portion 13 and the cover plate 3 due to the presence of the second stop 31, thereby ensuring the normal placement of the lead-out pin 2 and the power cord.

[0071] In further embodiments of the present application, as shown in FIG. 1, FIG. 2 and FIG. 5, the side of the lead-out wire portion 13 away from the body 11 is provided with a wire groove 133, which is arranged adjacent to the opening 132 and communicates with the opening 132 at one end and extends towards the lead-out pin 2 at the other end. Part of the power cord is adapted to be located in the wire groove 133. The provision of the wire groove 133 can limit the power cord, so that the power cord extends along the extension direction of the wire groove 133, providing a basis for the neat arrangement of the power cord, which is conducive to improving the reliability and manufacturability of the plastic shell 1.

[0072] In further embodiments of the present application, as shown in FIG. 1, FIG. 2 and FIG. 5, the side of the lead-out wire part 13 away from the body 11 is provided with a positioning protrusion 134, the positioning protrusion 134 is provided adjacent to the opening 132, and the wire groove 133 is provided on the positioning protrusion 134. It can be understood that the positioning protrusion 134 has multiple benefits. Firstly, the positioning protrusion 134 can strengthen the structural strength of the lead-out wire part 13, ensuring the structural reliability of the lead-out wire part 13. Secondly, the wire groove 133 is provided on the positioning protrusion 134, which can ensure the limiting effect of the wire groove 133 on the power cord, and at the same time, the inner bottom wall of the wire groove 133 is flush with the part of the lead-out wire part 13 that is not provided with the positioning protrusion 134, avoiding the occupation of the space inside the plastic shell 1 due to the existence of the wire groove 133, and avoiding affecting the structural reliability of the body 11. Thirdly, the positioning protrusion 134 can increase the depth of the wire groove 133, improve the limiting effect of the wire groove 133 on the power cord, and ensure the stability of the power cord.

[0073] In further embodiments of the present application, as shown in FIG. 1, FIG. 2 and FIG. 5, the side of the cover plate 3 facing the lead-out wire part 13 has a stop protrusion 32, the stop protrusion 32 is opposite and abuts the region of the lead-out wire part 13 provided with the wire groove 133. It can be understood that the side of the lead-out wire part 13 away from the body 11 is provided with the wire groove 133, and the provision of the wire groove 133 will increase the gap between the lead-out wire part 13 and the cover plate 3. By providing the stop protrusion 32 on the side of the cover plate 3 facing the lead-out wire part 13, the gap between the lead-out wire part 13 and the cover plate 3 can be reduced, and the stop protrusion 32 can stop the power cord located in the wire groove 133, preventing the power cord from coming out of the wire groove 133, and further improving the limiting effect of the wire groove 133 on the power cord. For example, as shown in FIG. 5, the side of the lead-out wire part 13 away from the body 11 is provided with the positioning protrusion 134, and the wire groove 133 is provided on the positioning protrusion 134. The stop protrusion 32 abuts the part of the positioning protrusion 134 that is not provided with the wire groove 133, and is spaced apart from the inner bottom wall of the wire groove 133, so as to ensure the arrangement space of the power cord.

[0074] In further embodiments of the present application, as shown in FIG. 1, FIG. 2 and FIG. 5, the lead-out pins 2 are multiple and are spaced apart along the circumferential direction of the body 11, and the wire grooves 133 are multiple and correspond one-to-one to the multiple lead-out pins 2, which can space apart and limit multiple sub-wires of the power cord respectively, and ensure the correct wiring of the multiple sub-wires. In a specific example, as shown in FIG. 5, the lead-out pins 2 are three and are spaced apart along the circumferential direction of the body 11, and are electrically connected to the U wire, the V wire and the W wire of the power cord respectively. The wire grooves 133 are three and correspond one-to-one to the three lead-out pins 2, which can be used to place the U wire, the V wire and the W wire of the power cord respectively, so as to space apart and limit the U wire, the V wire and the W wire, and ensure the correct wiring of the power cord.

[0075] It should be noted that the power line is arranged on the lead-out wire part 13, which can reduce the length of the power line, improve the convenience of operation, reduce the use amount of the lead-out wire part 13, and further reduce the production and processing cost of the plastic shell 1.

[0076] In further embodiments of the present application, referring to FIG. 5, the side of the lead-out wire part 13 away from the body 11 is provided with a water blocking boss 135, which extends along the width direction of the opening 132 (as shown in FIG. 2, the b direction) and is spaced apart from the opening 132 in the radial direction of the body 11, which can reduce the probability of water, dust or other impurities entering the lead-out wire part 13 from the opening 132, and can play a protective role for the plastic shell 1, improve the reliability and stability of the plastic shell 1, and thus avoid affecting the effectiveness of the lead-out pin 2.

[0077] In a specific example, as shown in FIG. 5, the stop protrusion 32 is located on the side of the water blocking boss 135 away from the axis of the body 11. It can be understood that the power line extends from the lead-out pin 2 to the opening 132. First, due to the presence of the water blocking boss 135, the part of the power line located in the wire groove 133 is bent towards the direction close to the cover plate 3, so that the surfaces of the cover plate 3 and the water blocking boss 135 facing each other together fix the power line. Then, due to the presence of the stop protrusion 32, the part of the power line located in the wire groove 133 is bent towards the direction away from the cover plate 3, so that the surfaces of the stop protrusion 32 and the guide groove facing each other together fix the power line. By bending the power line multiple times, a labyrinth structure can be formed, which can improve the fixing effect of the power line and ensure the protective effect of the cover plate 3 and the lead-out wire part 13 on the power line and the lead-out pin 2.

[0078] In further embodiments of the present application, as shown in FIGS. 1, 2 and 5, the lead-out wire part 13 is arranged between two adjacent mounting ears 14 among the plurality of mounting ears 14, which can provide a wire outlet space for the power line led out in the radial direction of the body 11, and facilitate the lead-out of the power line.

[0079] In some embodiments of the present application, as shown in FIGS. 1, 2 and 5, the plastic shell 1 is a one-piece, which can be integrally processed by processes such as injection molding, which can reduce the production process and thus improve the production efficiency. At the same time, it can also enhance the connection strength between the body 11, the fitting part 12 and the lead-out wire part 13, thereby enhancing the structural stability and reliability of the plastic shell 1 as a whole.

[0080] In some embodiments of the present application, as shown in FIG. 4, at least one of the two side surfaces of the cover body 71 in the thickness direction is provided with a reinforcing rib 74, which can improve the structural rigidity of the bearing end cover 7 and avoid vibration noise problems of the stator assembly 200.

[0081] In some embodiments of the present application, as shown in FIG. 4, the reinforcing ribs 74 include first reinforcing ribs 741 extending along the radial direction of the cover body 71, and second reinforcing ribs 742 extending along the circumferential direction of the bearing end cover 7, the first reinforcing ribs 741 and the second reinforcing ribs 742 are arranged alternately. The first reinforcing ribs 741 can improve the structural rigidity of the bearing end cover 7 in the radial direction of the cover body 71, the second reinforcing ribs 742 can improve the structural rigidity of the bearing end cover 7 in the circumferential direction of the cover body 71, and the arrangement of the first reinforcing ribs 741 and the second reinforcing ribs 742 alternately can comprehensively improve the structural rigidity of the bearing end cover 7, so as to avoid the vibration noise problem of the stator assembly 200.

[0082] The air conditioner according to embodiments of the present application is described below.

[0083] The air conditioner according to embodiments of the present application comprises the motor 100 described above.

[0084] The air conditioner comprises an air conditioner indoor unit and an air conditioner outdoor unit, and the motor 100 described above can be a motor 100 for driving a fan to rotate in the air conditioner outdoor unit, or a motor 100 for driving a fan wheel to rotate in the air conditioner indoor unit. Since the motor 100 adopts all the technical solutions of the above-mentioned embodiments, it at least has all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be described here in detail.

[0085] According to the air conditioner according to embodiments of the present application, the outer peripheral wall of the cover body 71 of the bearing end cover 7 is matched with the inner peripheral wall of the matching portion 12 of the plastic-encased shell 1 to seal the space in the matching portion 12, so that the bearing end cover 7 can better protect the stator assembly 4 and the bearing arranged in the plastic-encased shell 1, and avoid dust, liquid, oil and other impurities from entering the inside of the stator assembly 4 or the inside of the bearing, thereby prolonging the service life of the motor 100. In addition, compared with the bearing end cover 7 being arranged on the radial outer side of the matching portion 12, the matching of the outer peripheral wall of the cover body 71 of the bearing end cover 7 with the inner peripheral wall of the matching portion 12 can make the wall thickness of the matching portion 12 be the same, and the amount of material of the matching portion 12 is less, so that the mass of the matching portion 12 can be reduced, and the manufacturing cost of the matching portion 12 can be reduced. At the same time, the diameter of the outer peripheral wall of the cover body 71 of the bearing end cover 7 matched with the matching portion 12 is smaller, and the amount of material of the bearing end cover 7 is also less, so that the manufacturing cost of the bearing end cover 7 can be reduced, thereby realizing the cost reduction of the material of the plastic-encased shell 1.

[0086] The other configurations and operations of the motor 100 and the air conditioner according to embodiments of the present application are known to those skilled in the art, and will not be described in detail here.

[0087] In the description of the application, reference has been made to descriptive terms such as "one embodiment", "some embodiments", "an example", "a specific example" or "some examples" etc. Such terminology means that a particular feature, structure, material or characteristic being described is included in at least one embodiment or example of the application. The illustrative examples given are not necessarily to be construed as preferred or advantageous or with the exclusion of other equally valid examples. Moreover, such terminology is not intended to exclude the incorporation of one or more feature, structure, material or characteristic in any other example or embodiment. Furthermore, in the description of the application, terms such as first and second and the like can be used merely as a label to distinguish between different components of the application. In no way should such labelling imply that a particular component must be employed or be the only component of its kind to be employed in the application.

[0088] Although embodiments of the application have been illustrated and described, it will be clear to those of ordinary skill in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and the spirit of the application. The scope of the application is limited only by the claims and the equivalents thereof.

Claims

1. An electric machine, wherein, The motor comprises: a rotor assembly; a stator assembly located radially outward of the rotor assembly; an encapsulation shell provided outside the stator assembly and integrally formed with the stator assembly, the encapsulation shell comprising a body and a fitting portion protruding from an axial end surface of the body, the fitting portion being located radially inward of the body; a bearing end cover comprising a cover body located within the fitting portion, an outer peripheral wall of the cover body being fitted with an inner peripheral wall of the fitting portion for sealing a space within the fitting portion.

2. The electric machine of claim 1, wherein, The bearing end cover further comprises: a flange provided at an outer periphery of the cover body, the flange being located at a side of the fitting portion away from the body and abutting an axial end surface of the fitting portion away from the body.

3. The electric machine of claim 1 or 2, wherein, A fillet is provided between an outer peripheral wall of the fitting portion and an axial end surface of the body facing the fitting portion; and / or, in a direction from the fitting portion to the body, the outer peripheral wall of the fitting portion is inclined toward a direction away from an axis of the fitting portion.

4. The electric machine of any of claims 1-3, wherein, The encapsulation shell further comprises: mounting lugs provided on an outer peripheral wall of the body, the mounting lugs being a plurality of mounting lugs spaced apart in a circumferential direction of the body, the mounting lugs having mounting holes axially extending through the mounting lugs.

5. The electric machine of claim 4, wherein, A side surface of the mounting lugs in an axial direction of the body is a mounting surface and flush with an axial end surface of the body on the same side, and in a direction radially outward of the body, a side surface of the mounting lugs away from the mounting surface is inclined toward the mounting surface.

6. The electric machine of any of claims 1-5, wherein, The encapsulation shell further comprises a lead-out portion, the fitting portion and the lead-out portion being provided on the same axial end surface of the body, the lead-out portion being located radially outward of the fitting portion, and the encapsulation shell further comprises: a lead-out pin provided on the lead-out portion in the axial direction of the body for connecting a power supply wire and a winding wire of the stator assembly.

7. The electric machine of claim 6, wherein, A side of the lead-out portion away from the body is provided with a first stopper extending along an edge of the lead-out portion, the lead-out pin is located inside the first stopper, and a side of the first stopper away from an axis of the body has an opening for leading out the power supply wire.

8. The electric machine of claim 7, wherein, The encapsulation shell further comprises: a cover plate provided on a side of the lead-out portion away from the body, a second stopper being provided on a side of the cover plate facing the lead-out portion, the second stopper extending along an edge of the cover plate and being located outside the first stopper and abutting an outer peripheral wall of the first stopper.

9. The electric machine of claim 8, wherein, A wire guide groove is provided on the side of the lead-out portion away from the body, the wire guide groove being located adjacent to the opening and having one end in communication with the opening and the other end extending toward the lead-out pin, and a portion of the power supply wire is adapted to be located in the wire guide groove.

10. The electric machine of any of claims 7-9, wherein, A water blocking boss is provided on the side of the lead-out portion away from the body, the water blocking boss extending along a width direction of the opening and being spaced apart from the opening in a radial direction of the body.

11. An air conditioner wherein, The motor comprises any one of the motors according to claims 1-10.

Images