Stator structure, motor and refrigeration equipment

Abstract

The invention discloses a stator structure, a motor and refrigeration equipment. The stator structure comprises a stator core and a bearing mounting piece, a central hole penetrates through the stator core along the axial direction; the bearing installation part and the stator core are integrally formed, the bearing installation part comprises installation parts arranged at the two ends of the stator core respectively, bearing chambers are formed in the installation parts, the bearing chambers and the center hole are coaxially arranged, and the bearing chambers are used for installing bearings arranged on a rotor rotating shaft in a sleeving mode. According to the technical scheme, the stator core and the bearing installation part are integrally formed, generation of scraps is avoided, the concentricity of the bearing installation part and the center hole is guaranteed, therefore, the operation noise of the motor is reduced, and the use experience of a user is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of motors, and particularly to a stator structure, a motor, and a refrigeration device. Background Art

[0002] For an outer rotor motor, the rotating shaft of the rotor is usually rotatably inserted into the central hole of the stator core. In the prior art, a bearing mounting member is usually provided at the central hole of the stator core to ensure the stability of the rotor on the stator core. However, during the process of mounting the bearing mounting member on the stator core, debris is likely to be generated, and moreover, the bearing mounting member is prone to eccentricity relative to the central hole, causing the rotor to be skewed, resulting in noise during the rotation of the motor and affecting the user experience. Summary of the Invention

[0003] The main object of the present invention is to provide a stator structure, by integrally forming the stator core and the bearing mounting member, thereby reducing the operating noise of the motor and enhancing the user experience.

[0004] To achieve the above object, the stator structure proposed by the present invention includes:

[0005] A stator core, the stator core axially penetrates through a central hole; and

[0006] A bearing mounting member, the bearing mounting member is integrally formed with the stator core, the bearing mounting member includes mounting portions provided at both ends of the stator core, a bearing chamber is formed in the mounting portion, the bearing chamber is coaxially arranged with the central hole, and the bearing chamber is for mounting a bearing sleeved on the rotor shaft.

[0007] Optionally, the bearing mounting member further includes a connecting portion, and opposite ends of the connecting portion are respectively connected to the two mounting portions.

[0008] Optionally, the connecting portion is embedded in the stator core.

[0009] Optionally, a plurality of mounting holes are circumferentially distributed around the central hole of the stator core, the mounting holes are spaced apart from the central hole, and at least a part of the connecting portion is inserted into the mounting holes.

[0010] Optionally, the connecting portion includes a plurality of first connecting rods, the mounting holes axially penetrate through the stator core, and one first connecting rod is inserted into one mounting hole.

[0011] Optionally, the connecting portion includes a plurality of second connecting rods, and a plurality of axially extending mounting grooves are formed on the circumferential wall of the central hole, and one second connecting rod is mounted in one mounting groove.

[0012] Optionally, the side wall of the mounting portion is formed with a first step surface and a second step surface which are arranged away from the stator core, the first step surface is arranged closer to the center of the bearing chamber and the stator core than the second step surface, the first step surface is used to be opposite to the inner ring of the bearing, and the second step surface is used to abut against the outer ring of the bearing.

[0013] Optionally, the stator structure further includes an end cover, which is disposed at one end of the stator core and connected to the mounting portion.

[0014] Optionally, a screw hole is opened on the outer periphery of the mounting portion, and the end cover is connected to the screw hole through a screw structure.

[0015] Optionally, a connection hole is provided on a side of the end cover facing away from the stator core, and the connection hole is used for installing the stator structure.

[0016] Optionally, the end cover includes a main body portion and a reinforcing beam, wherein the reinforcing beam extends in a radial direction of the end cover and is connected to the mounting portion.

[0017] Optionally, the end cover is disposed on an end portion of the stator core and is spaced apart from the stator core, and resin is filled between the end cover and the stator core.

[0018] Optionally, the end cover is provided with a plurality of filling holes, and the filling holes are used to fill the resin.

[0019] Optionally, the stator core is wound with a winding, and the resin also fills and wraps the winding.

[0020] Optionally, the resin is configured as bulk molding compound.

[0021] Optionally, the bearing mounting member and the stator core are integrally formed by a casting process.

[0022] Optionally, the stator core is made of iron, and the bearing mounting member is made of aluminum alloy.

[0023] The present invention further provides a motor, comprising a rotor and the aforementioned stator structure, wherein a rotating shaft of the rotor is rotatably mounted in the center hole.

[0024] The present invention further provides a refrigeration device, which includes the aforementioned motor or the aforementioned stator structure.

[0025] In the technical solution of the present invention, by integrally forming the bearing mounting member with the stator core, compared with connecting the stator core and the bearing mounting member after separately forming them, the stator structure of this solution avoids the stator core from being scraped off debris by the bearing mounting member, reducing the noise generated by the collision of debris during the operation of the motor. In addition, during the forming process of the stator structure, by adjusting the posture of casting the bearing mounting member on the stator core, while stably mounting the mounting portion at the end of the stator core, the concentricity of the bearing chamber and the central hole is also ensured, so as to ensure that after the stator structure is assembled into a motor, the gap between the rotor and the outer peripheral surface of the stator core is uniform, improving the installation accuracy of the motor and the installation accuracy of the motor installed in the whole machine, reducing the noise generated during the rotation of the motor, and improving the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on the structures shown in these drawings.

[0027] Figure 1 It is a cross-sectional view showing an embodiment of the stator structure of the present invention;

[0028] Figure 2 is Figure 1 a schematic structural view of the stator core in

[0029] Figure 3 is Figure 1 a cross-sectional view of the stator core and the bearing mounting member in

[0030] Figure 4 is Figure 3 a partial enlarged view of part A in

[0031] Figure 5 is Figure 1 a schematic structural view of the end cover in

[0032] Figure 6 It is a cross-sectional view showing an embodiment of the motor of the present invention.

[0033] Explanation of the reference numerals in the drawings:

[0034] Reference numeral Name Reference numeral Name 100 Stator core 110 Central hole 111 Mounting groove 120 Mounting hole 200 Winding 300 Bearing mount 310 Mounting portion 311 First step surface 312 Second step surface 313 Screw hole 320 Connecting portion 321 First connecting rod 322 Second connecting rod 400 End cover 410 Body portion 411 Filling hole 420 Reinforcing beam 421 Connecting hole 500 Bulk molding compound 600 Rotor

[0035] The realization, functional features and advantages of the object of the present invention will be further described in conjunction with the embodiments and with reference to the drawings. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0036] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts fall within the protection scope of the present invention.

[0037] It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present invention are only used to explain the relative position relationship, movement conditions, etc. between components in a specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indications will also change accordingly.

[0038] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and / or" appearing throughout the text includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or a solution where A and B are satisfied simultaneously. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present invention.

[0039] The present invention provides a stator structure.

[0040] In the embodiments of the present invention, please refer to Figure 3 , the stator structure includes:

[0041] A stator core 100, and a central hole 110 axially penetrates through the stator core 100; and

[0042] A bearing mounting member 300, which is integrally formed with the stator core 100. The bearing mounting member 300 includes mounting portions 310 provided at both ends of the stator core 100. A bearing chamber is formed in the mounting portion 310. The bearing chamber is coaxially arranged with the central hole 110, and the bearing chamber is used for mounting a bearing sleeved on the rotating shaft of the rotor 600.

[0043] The technical solution of the present invention integrally forms the bearing mounting member 300 with the stator core 100. Compared with the case where the stator core 100 and the bearing mounting member 300 are separately formed and then connected, the stator structure of this solution avoids the stator core 100 being scraped off debris by the bearing mounting member 300, reduces the noise generated by the collision of debris during the operation of the motor. In addition, during the forming process of the stator structure, by adjusting the posture of casting the bearing mounting member 300 on the stator core 100, while enabling the mounting portion 310 to be stably mounted at the end of the stator core 100, the concentricity of the bearing chamber and the central hole 110 is also ensured. Thus, after the stator structure is assembled into a motor, the gap between the rotor 600 and the outer peripheral surface of the stator core 100 is uniform, improving the installation accuracy of the motor and the installation accuracy of the motor when installed in the whole machine, reducing the noise generated during the rotation of the motor, and enhancing the user experience.

[0044] It should be noted that, please refer to Figure 6 , the rotor 600 is arranged on the outer periphery of the stator core 100, that is, configured as an outer rotor 600. The stator core 100 is arranged inside the rotor 600, and the rotating shaft of the rotor 600 is rotatably inserted into the central hole 110. A bearing is sleeved on the rotating shaft corresponding to the position of the mounting portion 310 to reduce the resistance of the rotating shaft during rotation. Among them, the bearing chamber is coaxially arranged with the central hole 110, that is, the center of the bearing is on the same straight line as the axis of the central hole 110, ensuring that the rotor 600 can be installed in a predetermined posture, and at the same time reducing the installation error between the rotor 600 and the motor.

[0045] Without loss of generality, in one embodiment, please refer to Figure 1 , the material of the stator core 100 is iron, and the material of the bearing mounting member 300 is aluminum alloy. The materials of the two are different. During the operation of the motor, the winding 200 generates heat. Since the thermal expansion coefficients of the stator core 100 and the bearing mounting member 300 are different, in the process of separately forming and then connecting the bearing mounting member 300 and the stator core 100, the mutual force between the bearing mounting member 300 and the stator core 100 will change, resulting in the bearing mounting member 300 possibly detaching from the stator core 100, causing abnormal noise or even failure of the motor. In this embodiment, the stator core 100 and the bearing mounting member 300 are integrally formed, and the joint surfaces of the two are mutually melted, which can reduce the influence of temperature on the connection stability between the stator core 100 and the bearing mounting member 300, thereby ensuring the stability of the motor operation. In addition, the aluminum alloy material has good thermal conductivity, and the bearing mounting member 300 can accelerate the heat dissipation efficiency of the stator core 100 and increase the continuous operation time of the motor. Of course, in other embodiments, the materials of the stator core 100 and the bearing mounting member 300 can both be configured as iron materials.

[0046] Specifically, in this embodiment, please refer to Figure 3, the bearing mount 300 and the stator core 100 are integrally formed by a casting process. It can be understood that the casting process can effectively connect two workpieces, and the process is simple and highly convenient to operate. Thus, after the stator core 100 is stacked and formed, the stator core 100 is placed in a casting mold, and the material of the bearing mount 300 is poured, so that the stator core 100 and the bearing mount 300 are cast into one body. During this process, there is a certain degree of melting between the bearing mount 300 and the stator core 100, which improves the bonding strength between the bearing mount 300 and the stator core 100 and ensures the connection stability between the bearing mount 300 and the stator core 100. Of course, in other embodiments, the stator core 100 and the bearing mount 300 can also be integrally formed by stamping.

[0047] It can be understood that, please refer to Figure 3 , the bearing mount 300 has at least two mounting parts 310 respectively disposed at both ends of the stator core 100. The mounting parts 310 form bearing chambers coaxially arranged with the central hole 110. Among them, the mounting parts 310 can be independently disposed at the ends of the stator core 100, or the two mounting parts 310 can be connected into a whole through a connecting structure that axially penetrates the stator core 100. In one embodiment, please refer to Figures 1 to 6 , the bearing mount 300 further includes a connecting part 320. The opposite ends of the connecting part 320 are respectively connected to the two mounting parts 310. Thus, the two mounting parts 310 form a whole through the connecting part 320, ensuring the force balance of the rotating shaft of the rotor 600 between the two mounting parts 310, avoiding the swing of the rotor 600, and thus improving the stability of the rotor 600 during rotation. Without loss of generality, the connecting part 320 axially penetrates the stator core 100, increasing the contact area between the bearing mount 300 and the stator core 100, thereby improving the heat dissipation efficiency of the stator structure.

[0048] Furthermore, in this embodiment, please refer to Figure 1 and Figure 3 , the connecting part 320 is embedded in the stator core 100. It should be noted that at least part of the connecting part 320 is embedded in the stator core 100, increasing the contact area between the stator core 100 and the connecting part 320 and improving the heat dissipation efficiency of the stator core 100 through the connecting part 320. Among them, the stator core 100 can be preset with holes or grooves for pouring and embedding the connecting part 320 into the stator core 100 when casting the bearing mount 300. In addition, the connecting part 320 is embedded in the stator core 100, improving the force stability between the bearing mount 300 and the stator core 100, thereby ensuring the supporting and limiting effects of the mounting parts 310 on the rotating shaft of the rotor 600 and ensuring the stable operation of the motor. In other embodiments, the connecting part 320 can be formed on the peripheral wall of the central hole 110.

[0049] Further, in this embodiment, please continue to refer to Figure 2 and Figure 3 , a plurality of mounting holes 120 are circumferentially distributed around the central hole 110 of the stator core 100. The mounting holes 120 are spaced from the central hole 110, and at least a part of the connecting portion 320 is inserted into the mounting holes 120. It should be noted that the mounting holes 120 can be through holes provided on the stator core 100 or blind holes provided on the stator core. The mounting holes 120 are circumferentially distributed along the central hole 110 and are not communicated with the central hole 110. While avoiding interference with the winding 200, the volume of the stator structure can also be effectively controlled. In this way, the contact area between the connecting portion 320 and the mounting holes 120 is relatively large, improving the heat exchange efficiency between the bearing mounting member 300 and the stator core 100, thereby improving the heat dissipation efficiency of the stator structure. In addition, the plurality of mounting holes 120 are circumferentially distributed along the central hole 110, and the plurality of mounting holes 120 are relatively independently arranged, improving the stability of the connecting portion 320 in the stator core 100, and further preventing the bearing mounting member 300 from rotating with the rotating shaft of the rotor 600, ensuring that the motor can operate smoothly. In other embodiments, a stepped surface or a groove can also be provided on the circumferential wall of the central hole 110, improving the heat dissipation efficiency while ensuring the stability of the bearing mounting member 300 on the stator core 100.

[0050] Specifically, in this embodiment, please continue to refer to Figure 1 and Figure 3 , the connecting portion 320 includes a plurality of first connecting rods 321. The mounting holes 120 penetrate through the stator core 100 in the axial direction, and a first connecting rod 321 is inserted into a mounting hole 120. It can be understood that both ends of the first connecting rod 321 are respectively connected to the two mounting portions 310. That is, the first connecting rod 321 forms a supporting or connecting function between the two mounting portions 310. And the circumferential wall of the first connecting rod 321 abuts against the hole wall of the corresponding mounting hole 120, increasing the heat exchange efficiency between the connecting portion 320 and the stator core 100. At the same time, the mounting holes 120 circumferentially distributed along the central hole 110 also balance the heat dissipation efficiency of each part of the stator core 100 in the circumferential direction. In addition, the plurality of first connecting rods 321 are independently connected to the stator core 100, which can effectively prevent the bearing mounting member 300 from rotating with the rotating shaft of the rotor 600, ensuring that the motor can operate smoothly.

[0051] In one embodiment, please refer to Figure 1 and Figure 3, the connecting portion 320 includes a plurality of second link rods 322. A plurality of axially extending mounting grooves 111 are formed in the peripheral wall of the central hole 110, and one second link rod 322 is mounted in one mounting groove 111. Without loss of generality, the second link rod 322 is formed to conform to the peripheral wall of the central hole 110. That is, the outer periphery of the second link rod 322 is concave-arc-shaped at the notch of the mounting groove 111, so as to prevent the second link rod 322 from interfering with the rotation of the rotating shaft of the rotor 600. In this way, the peripheral wall of the second link rod 322 abuts against the groove wall of the mounting groove 111, increasing the heat exchange efficiency between the connecting portion 320 and the stator core 100. At the same time, the mounting grooves 111 distributed along the peripheral wall of the central hole 110 also balance the heat dissipation efficiency of each part of the stator core 100 in the circumferential direction. In addition, the plurality of second link rods 322 are independently connected to the stator core 100, which can effectively prevent the bearing mounting member 300 from rotating with the rotating shaft of the rotor 600, ensuring the stable operation of the motor.

[0052] Specifically, in this embodiment, please refer to Figure 3 , the connecting portion 320 includes a first link rod 321 and a second link rod 322. The stator core 100 is provided with both a mounting hole 120 and a mounting groove 111. The first link rod 321 and the second link rod 322 are arranged at intervals in the radial direction, so that the mounting portion 310 can be relatively stably arranged at the end of the stator core 100, thereby ensuring the stable rotation of the rotor 600.

[0053] In one embodiment, please refer to Figure 3 and Figure 4The side wall of the mounting portion 310 is formed with a first step surface 311 and a second step surface 312 which are arranged away from the stator core 100. The first step surface 311 is arranged closer to the center of the bearing chamber and the stator core 100 than the second step surface 312. The first step surface 311 is used to be spaced opposite to the inner ring of the bearing, and the second step surface 312 is used to abut against the outer ring of the bearing. It should be noted that during the rotation of the shaft of the rotor 600, the bearing in the mounting portion 310 is subjected to radial force, so that the bearing is deformed to a certain extent in the radial direction. At the same time, the bearing cavity is coaxially arranged with the center hole 110, so that the two bearing cavities and the center hole 110 form a cylindrical cavity for the rotation and installation of the shaft of the rotor 600. Thus, it can be understood that the radial width of the cylindrical cavity gradually increases in the direction from the center hole 110 toward the mounting portion 310 to form a three-layer cylindrical cavity, and the bearing is installed in the outermost cylindrical cavity, and the outer ring of the bearing is axially abutted against the second step surface 312, and the inner ring of the bearing is axially spaced relative to the first step surface 311, so that in the process of the bearing being deformed by force, the cylindrical cavity between the first step surface 311 and the second step surface 312 provides a deformation accommodating space for the inner ring of the bearing, thereby preventing the bearing from sliding axially due to deformation, and at the same time, a larger rotating shaft can be installed, thereby ensuring the stable rotation of the rotor 600 in the stator structure. Without loss of generality, the first step surface 311 and the second step surface 312 are arranged in an annular shape on the inner wall of the bearing cavity and are located on the corresponding cross section. Of course, in other embodiments, a smaller rotating shaft is inserted into the center hole 110, and the mounting portion 310 is only provided with a step surface, which abuts against the outer ring of the bearing, while the inner ring of the bearing is axially opposite to the center hole 110 to avoid interference with the deformation of the bearing.

[0054] In one embodiment, please refer to Figure 3 and Figure 5 The stator structure also includes an end cover 400, which is disposed at one end of the stator core 100 and connected to the mounting portion 310. It can be understood that the end cover 400 protects the motor, preventing the external structure from interfering with the operation of the motor, and the end cover 400 can provide an installation position when the motor is installed in the whole machine, thereby ensuring the stability of the motor in the whole machine. Of course, in other embodiments, the end cover 400 may not be provided, but connected to the external structure through the mounting portion 310, or the motor may be installed in the whole machine through the mounting portion 310.

[0055] Further, in this embodiment, please refer to Figure 3 and Figure 5, screw holes 313 are provided on the outer periphery of the installation part 310, and the end cover 400 is connected to the screw holes 313 through a screw connection structure. In this way, the connection stability between the installation part 310 and the end cover 400 is ensured by means of screwing. At the same time, after the end cover 400, the bearing installation part 300, and the stator core 100 are integrally formed, they can be screwed together, improving the production and connection convenience. Without loss of generality, the installation part 310 radially protrudes from the end face of the stator core 100 with a connection convex part (not shown in the figure), and screw holes 313 are provided on the connection convex part for connecting the end cover 400 to ensure the connection stability between the end cover 400 and the installation part 310. In addition, a limiting step surface is formed between the connection convex part and the stator core 100, and the stator core 100 can also provide a supporting effect on the installation part 310 through the limiting step surface, thereby improving the connection stability between the end cover 400 and the installation part 310. Of course, in other embodiments, the end cover 400 can also be connected to the installation part 310 by means of clamping or welding.

[0056] Furthermore, in this embodiment, please refer to Figure 3 and Figure 5 , a connection hole 421 is provided on the side of the end cover 400 facing away from the stator core 100, and the connection hole 421 is used for installing the stator structure. It can be understood that after the stator structure is connected to the rotor 600, it is installed on the whole machine through the end cover 400, avoiding interference with the rotation of the rotor 600 and ensuring the installation stability of the motor. In this way, the connection hole 421 is provided on the end cover 400 so that the end cover 400 can be stably connected to external components, and the operation difficulty of installing the motor is also reduced. Without loss of generality, the connection hole 421 is provided on the outer radial circle of the end cover 400, and the screw hole 313 is located on the inner radial circle of the end cover 400, so that a lever force is formed in the radial direction of the end cover 400 to ensure the stability of the motor in the whole machine. Of course, in other embodiments, the end cover 400 is also installed in the whole machine by means of welding.

[0057] In one embodiment, please refer to Figure 3 and Figure 5 , the end cover 400 includes a body part 410 and a reinforcing beam 420. The reinforcing beam 420 extends along the radial direction of the end cover 400, and the reinforcing beam 420 is connected to the installation part 310. In this way, the setting of the reinforcing beam 420 improves the structural strength of the end cover 400, thereby ensuring the stability of the motor in the whole machine, enabling the motor to operate smoothly, and reducing the possibility of generating noise. Without loss of generality, the connection hole 421 and the part connected to the screw hole 313 are both provided on the reinforcing beam 420 so that the end cover 400 can bear the supporting and connecting functions of installing the motor in the whole machine.

[0058] In one embodiment, please refer to Figure 1 and Figure 6, the end cover 400 is disposed on the end of the stator core 100 and is spaced apart from the stator core 100. Resin is filled between the end cover 400 and the stator core 100. It should be noted that there is a gap between the end cover 400 and the stator core 100, which can avoid affecting the connection between the end cover 400 and the stator core 100 due to process errors. Moreover, resin is filled between the end cover 400 and the stator core 100 to make the force transmission between the end cover 400 and the stator core 100 more direct, improving the integrity of the stator structure. In addition, the resin also protects the screwed structure connecting the end cover 400 and the mounting portion 310, improving the reliability and stability of the screwing connection between the end cover 400 and the mounting portion 310, ensuring the stable operation of the motor, and thus reducing the noise of the motor. Specifically, for the production and assembly process of the motor, it is as follows: First, the stator core 100 and the bearing mounting member 300 are integrally formed, then the winding 200 is wound around the stator core 100. Immediately afterwards, the end cover 400 is connected to the mounting portion 310, placed in a mold, and finally resin is filled to form a good whole of the stator structure. In addition, after the stator structure is assembled, the outer peripheries of the end cover 400 and the stator core 100 are exposed, providing a positioning reference for the assembly of the rotor 600 and the whole machine, ensuring the installation accuracy of the motor and the whole machine, and thus reducing the abnormal noise of the whole machine. Of course, in other embodiments, the end cover 400 may also be connected to the stator core 100 only through the mounting portion 310.

[0059] Further, in this embodiment, please refer to Figure 5 and Figure 6 , the end cover 400 is provided with a plurality of filling holes 411 for filling resin. It can be understood that the stator structure is placed in a specific mold, and then the resin can be filled into the end cover 400, the stator core 100 and the winding 200 through the filling holes 411, which is convenient to operate and the filling rate is guaranteed. Specifically, in this embodiment, the filling holes 411 are opened on the body portion 410, which not only ensures the convenience of filling resin but also avoids affecting the structural strength of the end cover 400. Of course, in other embodiments, the resin can also be filled through the gap edge between the end cover 400 and the stator core 100.

[0060] In one embodiment, please refer to Figures 5 to 6, the stator core 100 is wound with a winding 200, and the resin also fills and wraps the winding 200. It should be noted that the resin has good insulation and strength. Filling the resin into the winding 200 forms an insulating protection for the winding 200, avoiding interference with the operation of the motor. Without loss of generality, in this embodiment, the resin is configured as bulk molding compound 500, that is, BMC (Bulk Molding Compounds) unsaturated resin. It can be understood that BMC resin has a high viscosity, good insulation and excellent mechanical strength. While forming an insulating protection for the winding 200, it also ensures the integrity of the stator structure and improves the smoothness of the motor operation. Of course, in other embodiments, the resin can also be configured as polyimide resin.

[0061] The present invention also provides a motor, which includes a rotor 600 and a stator structure. The specific structure of the stator structure refers to the above embodiment. Since this motor adopts all the technical solutions of the above embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be elaborated here one by one. Among them, as Figure 6 shown, the rotor 600 is configured as an outer rotor 600, and the rotating shaft of the rotor 600 is rotatably inserted into the central hole 110 of the stator core 100.

[0062] The present invention also provides a refrigeration device, which includes a motor or a stator structure. The specific structure of the stator structure or the motor refers to the above embodiment. Since this refrigeration device adopts all the technical solutions of the above embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be elaborated here one by one. Among them, the motor is used to drive the impeller to rotate for transporting the refrigerant.

[0063] The above are only optional embodiments of the present invention, and do not limit the patent scope of the present invention accordingly. Any equivalent structural transformation made under the inventive concept of the present invention by using the content of the specification and drawings of the present invention, or directly / indirectly applied in other related technical fields, is included in the patent protection scope of the present invention.

Claims

1. A stator structure, characterized in that, include: A stator core, wherein the stator core has a center hole extending therethrough in the axial direction; A bearing mounting member is formed integrally with the stator core, and includes mounting portions disposed at both ends of the stator core, a bearing chamber is formed in the mounting portion, the bearing chamber is coaxially disposed with the center hole, and the bearing chamber is used for mounting a bearing sleeved on the rotor shaft.

2. The stator structure according to claim 1, characterized in that, The bearing mounting member further comprises a connecting portion, and opposite ends of the connecting portion are respectively connected to the two mounting portions.

3. The stator structure according to claim 2, characterized in that, The connecting portion is embedded in the stator core.

4. The stator structure according to claim 2, characterized in that, The stator core has a plurality of mounting holes distributed circumferentially around the center hole, the mounting holes are spaced apart from the center hole, and at least a portion of the connecting portion is inserted into the mounting holes.

5. The stator structure according to claim 4, characterized in that, The connecting portion includes a plurality of first connecting rods. The mounting hole penetrates the stator core in the axial direction. One of the first connecting rods is inserted in one of the mounting holes.

6. The stator structure according to claim 2, characterized in that, The connecting portion includes a plurality of second connecting rods. The peripheral wall of the central hole is provided with a plurality of mounting grooves extending in the axial direction. One of the second connecting rods is mounted in one of the mounting grooves.

7. The stator structure according to claim 1, characterized in that, The side wall of the mounting portion is formed with a first step surface and a second step surface which are arranged away from the stator core, and the first step surface is arranged closer to the center of the bearing chamber and the stator core than the second step surface; The first step surface is used to be spaced opposite to the inner ring of the bearing, and the second step surface is used to abut against the outer ring of the bearing.

8. The stator structure according to claim 1, characterized in that, The stator structure also includes an end cover, which is arranged at one end of the stator core and connected to the mounting portion.

9. The stator structure according to claim 8, characterized in that, The outer periphery of the mounting portion is provided with a screw hole, and the end cover is connected to the screw hole through a screw structure; And / or, a connection hole is provided on a side of the end cover away from the stator core, and the connection hole is used for installing the stator structure; And / or, the end cover includes a main body portion and a reinforcing beam, the reinforcing beam extends in a radial direction of the end cover, and the reinforcing beam is connected to the mounting portion.

10. The stator structure according to claim 8, characterized in that, The end cover is disposed on the end of the stator core and is spaced apart from the stator core. Resin is filled between the end cover and the stator core.

11. The stator structure according to claim 10, characterized in that, The end cover is provided with a plurality of filling holes, and the filling holes are used to fill the resin; And / or, the stator core is wound with a winding, and the resin also fills and wraps the winding; And / or, the resin is configured as bulk molding compound.

12. The stator structure according to any one of claims 1 to 11, characterized in that, The bearing mounting member and the stator core are integrally formed by a casting process; And / or, the material of the stator core is iron, and the material of the bearing mounting piece is aluminum alloy.

13. A motor, characterized in that, It comprises a rotor and a stator structure as claimed in any one of claims 1 to 12, wherein a rotating shaft of the rotor is rotatably mounted in the central hole.

14. A refrigeration device, characterized in that, The invention comprises the electric machine according to claim 13 or the stator structure according to any one of claims 1 to 12.

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