Outer rotor motor, fan component and air conditioner

Abstract

The utility model discloses an external rotor motor, a fan component and an air conditioner, the external rotor motor comprises a stator assembly, a rotor assembly and a first limiting piece, the stator assembly comprises a stator, and the stator is provided with a central hole; the rotor assembly comprises a shell and a rotating shaft, the shell rotatably covers the outer side of the stator, the rotating shaft is connected with the shell and penetrates through the center hole, and the rotating shaft and the stator are in running fit through a bearing which is matched in the center hole and sleeves the rotating shaft; the first limiting piece is connected with the stator, and the first limiting piece and the shell are in limiting fit in the axial direction to limit the first limit position of the rotating shaft. According to the external rotor motor provided by the embodiment of the utility model, the first limiting piece can be in limiting fit with the shell along the axial direction, so that the stability of the bearing can be improved, the matching stability between the stator assembly and the rotor assembly can be improved, and the overall stability of the external rotor motor can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of motors, in particular to an outer rotor motor, a fan component and an air conditioner. Background Art

[0002] As the functions of air conditioners increase, the size of air conditioners is getting larger and larger, and the space occupied by them is increasing, which affects the user experience. In related technologies, air conditioners usually use outer rotor motors to drive the crossflow impellers. However, in some technologies, the structural design of the outer rotor motors is not reasonable enough and cannot meet the needs of users well. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model provides an outer rotor motor, a fan component and an air conditioner, wherein the first limiter can be matched with the housing in the axial direction to improve the stability of the bearing, thereby improving the matching stability between the stator assembly and the rotor assembly, and is conducive to improving the overall stability of the outer rotor motor.

[0004] In a first aspect, an embodiment of the present application provides an external rotor motor, comprising: a stator assembly, the stator assembly comprising a stator, the stator having a center hole; a rotor assembly, the rotor assembly comprising an outer shell and a rotating shaft, the outer shell being rotatably covered on the outer side of the stator, the rotating shaft being connected to the outer shell and passing through the center hole, the rotating shaft and the stator being rotatably engaged through a bearing engaged in the center hole and sleeved on the outside of the rotating shaft; a first limit member, the first limit member being connected to the stator assembly, the first limit member being engaged with the outer shell along the axial direction to limit the first extreme position of the rotating shaft.

[0005] In the above technical solution, by setting the first limit member to cooperate with the housing in the axial direction, the stability of the bearing can be improved, so as to improve the matching stability between the stator assembly and the rotor assembly, which is beneficial to improving the overall stability of the outer rotor motor.

[0006] In some embodiments of the present application, the stator assembly includes a bottom cover arranged on one axial side of the stator, the outer shell includes an end cover portion arranged on the other axial side of the stator, and the outer shell also includes an annular portion surrounding the circumference of the stator and connected to the edge of the end cover portion; the first limiting member is connected to the bottom cover, and a portion of the first limiting member blocks the side of the end cover portion or the annular portion away from the bottom cover.

[0007] In some embodiments of the present application, the housing includes a flange portion provided on the outer peripheral side of the annular portion, and a portion of the first limiting member is located on a side of the flange portion away from the bottom cover.

[0008] In some embodiments of the present application, the flange portion is in the form of a ring surrounding the circumference of the stator; the first position limiting member is in the form of a ring, or the first position limiting member is a plurality of members spaced apart along the circumference of the housing.

[0009] In some embodiments of the present application, the first limiting member includes: a limiting end plate, the limiting end plate is located on the side of the end cover portion away from the bottom cover, and the limiting end plate is provided with an avoidance hole for avoiding the rotating shaft; and a limiting connecting plate, the limiting connecting plate connects the edge of the limiting end plate and the bottom cover.

[0010] In some embodiments of the present application, the limiting connecting plate is cylindrical and is arranged around the circumference of the stator.

[0011] In some embodiments of the present application, at least one of the limiting end plate and the limiting connecting plate is provided with a hollow hole.

[0012] In some embodiments of the present application, the outer rotor motor further includes: a second limit member, the second limit member is located between the end cover portion and the limit end plate to limit the first extreme position of the rotating shaft, and the second limit member is connected to the housing or the rotating shaft.

[0013] In some embodiments of the present application, the second limiting member is annular and is disposed on the rotating shaft.

[0014] In some embodiments of the present application, the stator includes a bearing shoulder protruding into the center hole, and the bearing includes a first support bearing and a second support bearing arranged on both axial sides of the bearing shoulder, and the second support bearing is close to the fitting position of the housing and the rotating shaft.

[0015] In some embodiments of the present application, a first buffer component is provided between the first support bearing and the bearing shoulder, and the first buffer component is configured to have a compression margin when the rotating shaft reaches the first limit position.

[0016] In some embodiments of the present application, when the stator assembly includes a bottom cover arranged on one axial side of the stator, the outer shell includes an annular portion surrounding the circumferential side of the stator, and the annular portion and the bottom cover are used to limit the second limit position of the rotating shaft; a second buffer component is provided between the second support bearing and the bearing shoulder, and the second buffer component is configured to have a compression margin when the rotating shaft reaches the second limit position.

[0017] In some embodiments of the present application, the outer rotor motor also includes: a third limit member, which is sleeved on the rotating shaft and clamped on the side of the first support bearing away from the bearing shoulder; a fourth limit member, which is sleeved on the rotating shaft and clamped on the side of the second support bearing away from the bearing shoulder.

[0018] In a second aspect, an embodiment of the present application provides a fan component, including a crossflow impeller and an outer rotor motor according to the embodiment of the first aspect of the utility model, wherein the outer rotor motor is connected to one axial end of the crossflow impeller.

[0019] In the above technical solution, the use of the above outer rotor motor is beneficial to improving the stability of the fan components.

[0020] In a third aspect, an embodiment of the present application provides an air conditioner, comprising a fan component according to an embodiment of the third aspect of the utility model.

[0021] In the above technical solution, the use of the above fan component is beneficial to improving the working stability of the air conditioner.

[0022] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0024] Figure 1 is a cross-sectional view of an outer rotor motor provided in some embodiments of the present application;

[0025] Figure 2 is a top view of an outer rotor motor provided in some embodiments of the present application;

[0026] Figure 3 is another top view of the outer rotor motor provided by some embodiments of the present application;

[0027] Figure 4 is another cross-sectional view of an outer rotor motor provided in some embodiments of the present application;

[0028] Figure 5 yes Figure 4 A cross-sectional view of an outer rotor motor shown in;

[0029] Figure 6 is a cross-sectional view of an outer rotor motor provided in some other embodiments of the present application;

[0030] Figure 7is a partial cross-sectional view of a fan component provided in some embodiments of the present application;

[0031] Figure 8 is a schematic diagram of a crossflow impeller and a motor installation structure provided in some embodiments of the present application;

[0032] Fig. 9 yes Figure 8 An exploded view of the crossflow impeller and motor mounting structure is shown in FIG.

[0033] Reference numerals:

[0034] Fan component 200, crossflow impeller 101, support base 102, motor mounting structure 103, mounting base 1031, pressing plate 1032, chassis 104,

[0035] Outer rotor motor 100,

[0036] Stator assembly 1, stator 11, center hole 111, bearing shoulder 112, bottom cover 12,

[0037] Rotor assembly 2, housing 21, end cover portion 211, annular portion 212, flange portion 213, rotating shaft 22,

[0038] The first limiting member 3, the limiting end plate 31, the avoidance hole 311, the limiting connecting plate 32,

[0039] The second limiting member 4,

[0040] The first support bearing 51, the second support bearing 52,

[0041] The first buffer component 61, the second buffer component 62,

[0042] The third limiting member 71 and the fourth limiting member 72 . DETAILED DESCRIPTION

[0043] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0044] In the description of the present utility model, it is necessary to understand that the terms "center", "thickness", "upper", "lower", "bottom", "inner", "outer", "axial", "radial", "circumferential" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, unless otherwise specified, "multiple" means two or more.

[0045] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" 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 invention can be understood according to specific circumstances.

[0046] Hereinafter, an outer rotor motor 100 according to an embodiment of the present invention will be described with reference to the accompanying drawings.

[0047] like Figure 1 and Figure 2 As shown, the outer rotor motor 100 according to the embodiment of the utility model includes a stator assembly 1, a rotor assembly 2 and a first limit member 3, the stator assembly 1 includes a stator 11, and the stator 11 has a center hole 111; the rotor assembly 2 includes a shell 21 and a rotating shaft 22, the shell 21 is rotatably covered on the outside of the stator 11, the rotating shaft 22 is connected to the shell 21, and the rotating shaft 22 is passed through the center hole 111, and the rotating shaft 22 and the stator 11 are rotatably matched through a bearing that is matched in the center hole 111 and sleeved outside the rotating shaft 22; the first limit member 3 is connected to the stator assembly 1, and the first limit member 3 is matched with the shell 21 along the axial limit to limit the first extreme position of the rotating shaft 22.

[0048] Therefore, by setting the first limit member 3 to cooperate with the shell 21 in the axial direction, the rotating shaft 22 moves along the axial direction of the rotating shaft 22 to the first extreme position, so that the axial movement distance of the rotating shaft 22 is within a suitable range, that is, the axial movement amplitude of the rotor assembly 2 relative to the stator assembly 1 in the rotating shaft 22 can be limited, thereby improving the matching stability between the stator assembly 1 and the rotor assembly 2.

[0049] It can be understood that the first stopper 3 and the housing 21 are matched in the axial direction, which can be understood as the first stopper 3 and the housing 21 are matched in the axial direction of the shaft 22 (for example, the extension direction of the shaft 22) in the direction from the housing 21 to the first stopper 3. For example, the axial direction is parallel to the up-down direction. Figure 1 When part of the first limit member 3 is located on the upper side of part of the shell 21, the rotating shaft 22 moves upward along the axial direction of the rotating shaft 22 relative to the stator 11, and the shell 21 moves toward the first limit member 3 and cooperates with the first limit member 3 to limit the rotation. At this time, the position of the rotating shaft 22 is the first extreme position of the rotating shaft 22 along the axial direction upward. Or, when part of the first limit member 3 is located on the lower side of part of the shell 21, the rotating shaft 22 moves downward along the axial direction relative to the stator 11, and the shell 21 moves toward the first limit member 3 and cooperates with the first limit member 3 to limit the rotation. At this time, the position of the rotating shaft 22 is the first extreme position of the rotating shaft 22 along the axial direction downward.

[0050] For example, in combination Figure 1 The outer rotor motor 100 includes a stator assembly 1 and a rotor assembly 2. The stator assembly 1 includes a stator 11. The stator 11 is configured as a cylindrical structure, and the stator 11 is provided with an axial direction (e.g. Figure 1 The rotor assembly 2 includes a housing 21 and a rotating shaft 22. The housing 21 is spaced apart from the outside of the stator 11 and is rotatable relative to the stator 11. The rotating shaft 22 is connected to the housing 21. One end of the rotating shaft 22 protrudes from the side of the housing 21 facing the stator 11 and is passed through the center hole 111. A bearing, such as a deep groove ball bearing, is sleeved on the rotating shaft 22. The outer side of the bearing is used to cooperate with the inner wall of the center hole 111 so that the rotating shaft 22 can be rotatably matched with the stator 11.

[0051] Among them, the outer rotor motor 100 also includes a first limit member 3, the first limit member 3 is connected to the stator assembly 1 (for example, the bottom cover 12 below), the first limit member 3 is matched with the outer shell 21 along the axial upper limit, and the rotating shaft 22 moves axially upward to the first limit position to limit the axial upward movement amplitude of the rotor assembly 2 relative to the stator assembly 1 along the rotating shaft 22, or the rotating shaft 22 moves axially downward to the first limit position to limit the axial downward movement amplitude of the rotor assembly 2 relative to the stator assembly 1 along the rotating shaft 22, which is beneficial to reduce or eliminate the impact on the bearing and improve the matching stability between the stator assembly 1 and the rotor assembly 2, thereby helping to improve the reliability of the outer rotor motor 100.

[0052] For example, combined with Figure 1The stator assembly 1 further includes a bottom cover 12 disposed on one axial side of the stator 11, a portion of the housing 21 is disposed on the other axial side of the stator 11, a first stopper 3 is disposed on the radially outer side of the housing 21 and connected to the bottom cover 12, a portion of the first stopper 3 is disposed protruding toward the radially inner side, and a portion of the first stopper 3 is axially opposite to a portion of the housing 21. When the rotating shaft 22 moves to a first limit position in a direction away from the bottom cover 12, the first stopper 3 and the housing 21 are limited in position to limit the rotating shaft 22 from continuing to move in a direction away from the bottom cover 12; or, when the rotating shaft 22 moves to a first limit position in a direction close to the bottom cover 12, the first stopper 3 and the housing 21 are limited in position to limit the rotating shaft 22 from continuing to move in a direction close to the bottom cover 12. At this time, a certain gap is still maintained between the bearing and other components (such as the stator 11), which can avoid the rigid collision between the bearing and other components, which is conducive to reducing or eliminating the impact on the bearing, and can improve the matching stability between the stator assembly 1 and the rotor assembly 2.

[0053] In the above technical solution, by setting the first limit member 3, it can be limited and matched with the shell 21 along the axial direction, so as to improve the stability of the bearing, so as to improve the matching stability between the stator assembly 1 and the rotor assembly 2, which is beneficial to improve the overall stability of the outer rotor motor 100.

[0054] In the description of the present application, "axial" may be understood as the axial direction of the rotating shaft 22, i.e., the extension direction of the rotation axis of the rotating shaft 22; "radial" may be understood as the radial direction of the rotating shaft 22, i.e., the direction of the rotation axis of the rotating shaft 22 in the radial plane, and the radial plane is perpendicular to the axial direction of the rotating shaft 22; and "circumferential" may be understood as the direction around the rotation axis of the rotating shaft 22.

[0055] In some embodiments of the present application, Figure 1 The stator assembly 1 includes a bottom cover 12 arranged on one axial side of the stator 11, the housing 21 includes an end cover portion 211 arranged on the other axial side of the stator 11, and the housing 21 also includes an annular portion 212 surrounding the circumference of the stator 11 and connected to the edge of the end cover portion 211; the first limiting member 3 is connected to the bottom cover 12, and part of the first limiting member 3 is blocked on the side of the end cover portion 211 or the annular portion 212 away from the bottom cover 12.

[0056] For example, combined with Figure 1The housing 21 includes an end cover 211 and an annular portion 212. The annular portion 212 is constructed as a cylindrical structure. The annular portion 212 surrounds the outer peripheral side of the stator 11, and the annular portion 212 is spaced apart from the stator 11. The annular portion 212 may include a permanent magnet (such as a magnetic ring). When interacting with the electromagnetic coil (such as a stator coil) of the stator 11, the housing 21 will start to rotate. The end cover 211 is disposed on one side of the stator 11 along the axial direction and is connected to the annular portion 212. The stator assembly 1 includes a bottom cover 12, which is disposed on the other side of the stator 11 along the axial direction, that is, the side of the stator 11 away from the end cover 211. Among them, combined with Figure 1 The first position-limiting member 3 is connected to the bottom cover 12, and part of the first position-limiting member 3 is blocked at the end cover portion 211, and part of the first position-limiting member 3 can cooperate with the end cover portion 211 along the axial limit; or, part of the first position-limiting member 3 is blocked at the side of the annular portion 212 away from the bottom cover 12, and the first position-limiting member 3 can cooperate with the annular portion 212 along the axial limit.

[0057] In the specific working process, when the rotor assembly 2 moves relative to the stator assembly 1 and away from the stator assembly 1, the rotating shaft 22 moves to the first extreme position in the direction away from the bottom cover 12, and the first limit member 3 is limited by the outer shell 21, and the first limit member 3 restricts the outer shell 21 from continuing to move, thereby avoiding contact between the bearing and other components to a certain extent, so as to reduce or eliminate the impact on the bearing.

[0058] For example, combined with Figure 1 , the rotor assembly 2 is subjected to an external force (such as impact) and moves upward along the axial direction of the rotating shaft 22, that is, the rotor assembly 2 moves upward along the axial direction of the rotating shaft 22 relative to the stator assembly 1, and a portion of the first limit member 3 is located on the axial upper side of the end cover portion 211. When the rotor assembly 2 moves upward along the axial direction of the rotating shaft 22, the first limit member 3 and the end cover portion 211 are limited and matched to limit the end cover portion 211 from continuing to move upward. At this time, the rotating shaft 22 moves to the first limit position; or, in combination with Figure 1 The first stopper 3 is located on the axial upper side of the annular portion 212. When the rotor assembly 2 moves upward along the axial direction of the rotating shaft 22, the first stopper 3 and the annular portion 212 are limited and matched to limit the annular portion 212 from continuing to move upward. At this time, the rotating shaft 22 moves to the first limit position. In this way, the bearing can be prevented from being damaged by contact with other components (such as the stator 11), and the reliability of the outer rotor motor 100 can be improved.

[0059] In some embodiments of the present application, Figure 1 The housing 21 includes a flange portion 213 disposed on the outer peripheral side of the annular portion 212 , and a portion of the first limiting member 3 is located on a side of the flange portion 213 away from the bottom cover 12 .

[0060] For example, combined with Figure 1The flange portion 213 is located on the axial side of the annular portion 212 close to the bottom cover 12, and the flange portion 213 is protruded radially outward, and part of the first limiting member 3 is located on the side of the flange portion 213 away from the bottom cover 12, that is, part of the first limiting member 3 and the flange portion 213 are axially arranged opposite to each other, thereby, the first limiting member 3 can limit the movement of the flange portion 213 in the direction away from the bottom cover 12, when the first limiting member 3 and the flange portion 213 are limitedly matched, the flange portion 213 moves to the extreme position, and at this time, the rotating shaft 22 moves to the first extreme position.

[0061] In the above technical solution, by providing the housing 21 with the flanged portion 213, the first stopper 3 is conveniently matched with the housing 21 to limit the first limit position of the rotating shaft 22, thereby preventing the bearing from being damaged by contact with other components, and improving the reliability of the outer rotor motor 100. Secondly, the flanged portion 213 is simple to match with the first stopper 3, which is conducive to simplifying the structural design of the housing 21.

[0062] In some embodiments of the present application, Figure 1-Figure 5 The flange portion 213 is annular and surrounds the circumference of the stator 11; the first stopper 3 is annular, or the first stopper 3 is a plurality of first stoppers 3 arranged at intervals along the circumference of the housing 21. Thus, the arrangement of the first stopper 3 has multiple options, which can better meet the structural requirements of the outer rotor motor 100.

[0063] For example, combined with Figure 1-Figure 5 The housing 21 includes an end cover portion 211 and an annular portion 212. The end cover portion 211 is located on one axial side of the stator 11. The annular portion 212 is connected to the end cover portion 211 and is arranged around the circumference of the stator 11. The flange portion 213 is connected to one end of the annular portion 212 away from the end cover portion 211, and the flange portion 213 is formed into an annular structure. The stator 11 is located on the radial inner side of the flange portion 213. The outer rotor motor 100 includes a first stopper 3. The first stopper The first limit member 3 is located on the radially outer side of the annular portion 212, and the first limit member 3 is formed as an annular structure. The stator 11 is located on the radially inner side of the first limit member 3, and a portion of the first limit member 3 can cooperate with the flange portion 213 along the axial upper limit position; or, the rotor motor includes a plurality of first limit members 3 (for example, two, three, or four, etc.), and the plurality of first limit members 3 are equidistantly spaced along the circumference of the outer casing 21, and a portion of each first limit member 3 can cooperate with the flange portion 213 along the axial upper limit position.

[0064] In some embodiments of the present application, Figure 6 The first limiting member 3 includes a limiting end plate 31 and a limiting connecting plate 32. The limiting end plate 31 is located on the side of the end cover portion 211 away from the bottom cover 12. The limiting end plate 31 is provided with an avoidance hole 311 for avoiding the rotating shaft 22; the limiting connecting plate 32 connects the edge of the limiting end plate 31 and the bottom cover 12.

[0065] For example, combined with Figure 6 The limiting end plate 31 is located on the side of the end cover 211 away from the bottom cover 12, the limiting end plate 31 is spaced apart from the end cover 211, and the limiting end plate 31 is formed with an avoidance hole 311, the rotating shaft 22 is passed through the avoidance hole 311 and protrudes from the limiting end plate 31, the limiting connecting plate 32 connects the edge of the limiting end plate 31 and the bottom cover 12, and the limiting connecting plate 32 is spaced apart from the annular portion 212. Thus, the first limiting member 3 can limit the end cover 211 from moving in a direction away from the bottom cover 12, and when the first limiting member 3 is in limited cooperation with the end cover 211, the end cover 211 moves to the limit position, and at this time the rotating shaft 22 moves to the first limit position.

[0066] In the above technical solution, by arranging the limiting end plate 31 on the side of the end cover portion 211 away from the bottom cover 12, the limiting end plate 31 cooperates with the end cover portion 211 along the axial limit to limit the extreme position of the end cover portion 211, that is, to limit the first extreme position of the rotating shaft 22, so that the first extreme position of the rotating shaft 22 is in a suitable position, which can avoid damage caused by the bearing fitting with other components and improve the reliability of the outer rotor motor 100.

[0067] In some embodiments of the present application, Figure 6 The limiting connecting plate 32 is cylindrical and is arranged around the circumference of the stator 11. Therefore, the limiting connecting plate 32 and the limiting end plate 31 are arranged outside the stator assembly 1, which can protect the stator assembly 1 and the rotor assembly 2, and prevent foreign matter from affecting the operation of the outer rotor motor 100 to a certain extent.

[0068] In some embodiments of the present application, at least one of the limiting end plate 31 and the limiting connecting plate 32 is provided with a hollow hole, thereby reducing the deadweight of the first limiting member 3 and the weight of the outer rotor motor 100, which is conducive to achieving lightweight.

[0069] In some embodiments of the present application, Figure 6 The outer rotor motor 100 further includes a second limit member 4 , which is located between the end cover 211 and the limit end plate 31 to limit the first limit position of the rotating shaft 22 , and the second limit member 4 is connected to the housing 21 or the rotating shaft 22 .

[0070] For example, combined with Figure 6The first limit member 3 includes a limit end plate 31 and a limit connecting plate 32. The limit end plate 31 is located on the side of the end cover 211 away from the bottom cover 12. The limit connecting plate 32 connects the edge of the limit end plate 31 and the bottom cover 12 and is arranged around the circumference of the stator 11. The outer rotor motor 100 also includes a second limit member 4, which is arranged on the end cover 211. Therefore, the first limit member 3 can be limited and matched with the second limit member 4. The first limit member 3 can limit the movement of the end cover 211 in the direction away from the bottom cover 12. When the first limit member 3 is limited and matched with the second limit member 4, the end cover 211 moves to the limit position, so that the first limit member 3 and the second limit member 4 can limit the limit position of the end cover 211, that is, limit the first limit position of the rotating shaft 22, so that the first limit position of the rotating shaft 22 is in a suitable position. Secondly, the second limiting portion cooperates with the first limiting member 3 to reduce the impact when the stator assembly 1 cooperates with the first limiting member 3, which is beneficial to protecting the safety of the stator assembly 1.

[0071] In the above technical solution, the second limit member 4 is arranged between the end cover 211 and the limit end plate 31 to limit the first limit position of the rotating shaft 22, so that the first limit member 3 can be limited and matched with the second limit member 4, and the stability of the bearing can be further improved. Secondly, the second limit portion is limited and matched with the first limit member 3, which can reduce the impact when the stator assembly 1 is limited and matched with the first limit member 3, which is conducive to protecting the safety of the stator assembly 1.

[0072] In some embodiments of the present application, Figure 6 The second stopper 4 is annular and is sleeved on the rotating shaft 22. Thus, the second stopper 4 is formed into an annular structure, and the second stopper 4 is sleeved between the stopper end plate 31 and the end cover 211. The second stopper 4 has a certain sealing effect to seal the avoidance hole 311, which can prevent foreign matter from entering the outer rotor motor 100 to a certain extent.

[0073] In some embodiments of the present application, Figure 1 and Figure 6 The stator 11 includes a bearing shoulder 112 protruding into the center hole 111, and the bearing includes a first support bearing 51 and a second support bearing 52 arranged on both axial sides of the bearing shoulder 112, and the second support bearing 52 is close to the matching position of the housing 21 and the rotating shaft 22.

[0074] For example, combined with Figure 1 and Figure 6The stator assembly 1 comprises a stator 11, which has a central hole 111 extending through the axial direction. The stator 11 comprises a bearing shoulder 112, which is arranged at the middle of the central hole 111 along the axial direction and protrudes toward the central hole 111. The rotor assembly 2 comprises a housing 21 and a rotating shaft 22, the housing 21 is connected to the rotating shaft 22, the rotating shaft 22 is passed through the central hole 111, a first support bearing 51 and a second support bearing 52 are sleeved on the rotating shaft 22, and the first support bearing 51 and the second support bearing 52 are arranged spaced apart along the axial direction of the rotating shaft 22, the first support bearing 51 and the second support bearing 52 are located on both sides of the bearing shoulder 112 along the axial direction of the rotating shaft 22, that is, the first support bearing 51 is arranged on the side of the bearing shoulder 112 away from the matching position of the housing 21 and the rotating shaft 22, and the second support bearing 52 is arranged on the side of the bearing shoulder 112 close to the matching position of the housing 21 and the rotating shaft 22.

[0075] The outer rotor motor 100 further includes a first position-limiting member 3 , which is connected to the stator assembly 1 , and the first position-limiting member 3 can be matched with the housing 21 in an axial position-limiting manner.

[0076] In the specific work process, combined with Figure 1 and Figure 6 When the rotor assembly 2 moves in a direction away from the stator assembly 1 relative to the stator assembly 1 (for example, the rotor assembly 2 moves axially upward relative to the stator assembly 1), the first support bearing 51 can be limited and matched with the bearing shoulder 112 to prevent the rotor assembly 2 and the stator assembly 1 from being separated; and / or, the first limiter 3 can be limited and matched with the housing 21 to prevent the rotor assembly 2 and the stator assembly 1 from being separated. At the same time, the first limiter 3 and the housing 21 are limited and matched in the axial direction to limit the first limit position of the rotating shaft 22, to a certain extent, to prevent the rotating shaft 22 from driving the first support bearing 51 to contact or collide with the bearing shoulder 112, etc., which is conducive to reducing or eliminating the impact on the first support bearing 51. When the rotor assembly 2 moves in a direction close to the stator assembly 1 relative to the stator assembly 1 (for example, the rotor assembly 2 moves axially downward relative to the stator assembly 1), the second support bearing 52 can be limited and matched with the bearing shoulder 112 to prevent the rotor assembly 2 and the stator assembly 1 from being attached and damaged. In this way, the reliability of the outer rotor motor 100 can be improved.

[0077] In the above technical solution, by setting the first support bearing 51 and the second support bearing 52 on both axial sides of the bearing shoulder 112, the first support bearing 51 and the second support bearing 52 can move the rotating shaft 22 to avoid the rotor assembly 2 and the stator assembly 1 from disengaging, thereby ensuring the reliability of the outer rotor motor 100.

[0078] In some embodiments of the present application, Figure 1, a first buffer component 61 is provided between the first support bearing 51 and the bearing shoulder 112, and the first buffer component 61 is configured to have a compression margin when the rotating shaft 22 reaches the first limit position. That is, the first buffer component 61 has not yet reached the limit compression state at this time, and has the ability to be further compressed, thereby avoiding rigid contact between the bearing shoulder 112 and the first support bearing 51, so as to protect the first support bearing 51. It should be noted that the first limit position is, for example, Figure 1 The limit position of axial upward movement.

[0079] For example, combined with Figure 1 A first buffer component 61 is provided between the first support bearing 51 and the bearing shoulder 112. The first buffer component 61 can be a corrugated gasket or other buffer structure with the same function, and the first buffer component 61 is constructed to have a compression margin when the rotating shaft 22 reaches the second limit position.

[0080] Optionally, in the axial direction of the rotating shaft 22, the distance between the first support bearing 51 and the bearing shoulder 112 is set to d1, and the distance between the first limit member 3 and the housing 21 is set to d2, that is, the stroke of the rotating shaft 22 when it moves to the first limit position is d2, and the thickness of the first buffer component 61 after being fully compressed (for example, flattened) is set to d3, satisfying: d1-d3>d2, so that the first buffer component 61 can have a compression margin when the rotating shaft 22 reaches the first limit position. For example, in some examples, d1=1.5mm, d2=0.8mm~1mm, and d3=0.3mm.

[0081] In the above technical solution, a first buffer component 61 is provided between the first support bearing 51 and the bearing shoulder 112, so that the first buffer component 61 can buffer the first support bearing 51 to reduce the impact force between the rotor assembly 2 and the stator assembly 1, and by setting the first buffer component 61 to have a compression margin when the rotating shaft 22 reaches the first limit position, a rigid collision between the first support bearing 51 and the first buffer component 61 can be avoided, which is beneficial to improving the stability of the outer rotor motor 100.

[0082] In some embodiments of the present application, Figure 6 When the stator assembly 1 includes a bottom cover 12 disposed on one axial side of the stator 11, the housing 21 includes an annular portion 212 surrounding the circumference of the stator 11, and the annular portion 212 and the bottom cover 12 are used to limit the second limit position of the rotating shaft 22. It should be noted that the second limit position is, for example, Figure 1 The limit position of axial downward movement.

[0083] For example, combined with Figure 6The bottom end of the annular portion 212 is spaced apart from the bottom cover 12. When the rotating shaft 22 moves to the first limit position toward the bottom cover 12, the bottom end of the annular portion 212 stops and cooperates with the bottom cover 12. At this time, a certain gap is still maintained between the second support bearing 52 and the bearing shoulder 112, which can avoid the rigid collision between the second support bearing 52 and the bearing shoulder 112. In this way, the second support bearing 52 can be protected, which is conducive to improving the reliability of the outer rotor motor 100.

[0084] A second buffer component 62 is provided between the second support bearing 52 and the bearing shoulder 112, and the second buffer component 62 is configured to have a compression margin when the rotating shaft 22 reaches the second limit position. That is, the second buffer component 62 has not yet reached the limit compression state at this time, and has the ability to be further compressed, thereby avoiding rigid contact between the bearing shoulder 112 and the second support bearing 52, and protecting the second support bearing 52.

[0085] For example, combined with Figure 6 A second buffer component 62 may be provided between the second support bearing 52 and the bearing shoulder 112. The second buffer component 62 may be a corrugated gasket or other buffer structure with the same function, and the second buffer component 62 is configured to have a compression margin when the rotating shaft 22 reaches the second limit position.

[0086] Optionally, in the axial direction of the rotating shaft 22, the spacing between the second support bearing 52 and the bearing shoulder 112 is set to d4, and the spacing between the annular portion 212 and the bottom cover 12 is set to d5, that is, the stroke of the rotating shaft 22 moving to the second limit position is set to d5, and the thickness of the second buffer component 62 after being fully compressed is set to d6, satisfying: d4-d6>d5, so that the second buffer component 62 has a compression margin when the rotating shaft 22 reaches the second limit position. For example, in some examples, d4=1.5mm, d5=0.8mm~1mm, and d6=0.3mm.

[0087] In the above technical solution, a second buffer component 62 is provided between the second support bearing 52 and the bearing shoulder 112, so that the second buffer component 62 can buffer the second support bearing 52 to reduce the impact force between the rotor assembly 2 and the stator assembly 1, and by setting the second buffer component 62 to have a compression margin when the rotating shaft 22 reaches the second limit position, a rigid collision between the second support bearing 52 and the second buffer component 62 can be avoided, which is beneficial to improving the stability of the outer rotor motor 100.

[0088] Optionally, the structures (e.g., model or type) of the first buffer component 61 and the second buffer component 62 may be the same or different, and the thickness of the first buffer component 61 and the second buffer component 62 may be adjusted according to the actual structure or requirements to meet the requirements of the outer rotor motor 100. Optionally, the values ​​of d1-d6 are the distances when the outer rotor motor 100 is assembled and is not subject to any external force except gravity.

[0089] It should be noted that, by arranging a first buffer component 61 between the first support bearing 51 and the bearing shoulder 112, and a second buffer component 62 between the second support bearing 52 and the bearing shoulder 112, the first buffer component 61 can provide a certain preload force to the first support bearing 51, and the second buffer component 62 can provide a certain preload force to the second support bearing 52, so as to ensure the stable installation of the first support bearing 51 and the second support bearing 52. For example, the first buffer component 61 and the second buffer component 62 can protect the first support bearing 51 and the second support bearing 52 respectively, so as to reduce or eliminate the impact force (such as vibration and falling during transportation) received when the outer rotor motor 100 is assembled and installed in the air conditioner.

[0090] Among them, the bearings (such as the first support bearing 51 and the second support bearing 52) include a bearing inner ring, a bearing outer ring and balls. There is a certain gap (such as play) between the bearing inner ring and the bearing outer ring. By setting a buffer component (such as the first buffer component 61 and the second buffer component 62) to limit the axial displacement between the bearing inner ring and the bearing outer ring, the stability of the bearing can be ensured, and to a certain extent, the bearing can be prevented from being damaged due to impact or the like, which may cause the outer rotor motor 100 to make a loud noise during operation.

[0091] In addition, combined Figure 1 and Figure 6 The first stopper 3 cooperates with the housing 21 in the axial direction to avoid impact force (for example, the outer rotor motor 100 is subjected to impact force from the bottom cover 12 toward the end cover 211). The first buffer component 61 has not been completely flattened. The first buffer component 61 can buffer the first support bearing 51 and reduce the impact force on the balls in the first support bearing 51, which is beneficial to reduce the damage of the balls to the raceways of the inner ring and the outer ring of the bearing, thereby helping to reduce the damage to the first support bearing 51. Similarly, combined with Figure 1 and Figure 6The annular portion 212 and the bottom cover 12 are limited in the axial direction to avoid impact force (for example, the outer rotor motor 100 is subjected to impact force from the end cover portion 211 toward the bottom cover 12). The second buffer component 62 has not been completely flattened. The second buffer component 62 can buffer the second support bearing 52 and reduce the impact force on the balls in the second support bearing 52, which is beneficial to reduce the damage of the balls to the raceways of the inner ring and the outer ring of the bearing, thereby helping to reduce damage to the second support bearing 52.

[0092] For example, combined with Figure 1 The first stopper 3 is provided on the bottom cover 12 and is located on the radial outer side of the housing 21. The flange portion 213 is located at one end of the annular portion 212 away from the end cover portion 211 and protrudes toward the radial outer side. The first stopper 3 and the flange portion 213 can be limitedly matched along the axial direction. At this time, the spacing between the first stopper 3 and the flange portion 213 is set to d2. The annular portion 212 and the bottom cover 12 can be limitedly matched along the axial direction. At this time, the spacing between the annular portion 212 and the bottom cover 12 is set to d5. Therefore, when the rotating shaft 22 moves upward along the axial direction to the first limit position, the first stopper 3 and the flange portion 213 are limitedly matched, and the first support bearing 51 squeezes the first buffer component 61. At this time, the first buffer component 61 is partially compressed by the first support bearing 51. When the rotating shaft 22 moves downward along the axial direction to the second limit position, the annular portion 212 and the bottom cover 12 are limitedly matched, and the second support bearing 52 squeezes the second buffer component 62. At this time, the second buffer component 62 is partially compressed by the second support bearing 52.

[0093] For example, combined with Figure 6 The first limiting member 3 includes a limiting end plate 31 and a limiting connecting plate 32. The limiting end plate 31 is located on the side of the end cover portion 211 away from the bottom cover 12. The limiting connecting plate 32 connects the limiting end plate 31 and the bottom cover 12. The limiting end plate 31 and the end cover portion 211 can be matched along the axial limiting direction. At this time, the spacing between the limiting end plate 31 and the end cover portion 211 is set to d2. The annular portion 212 and the bottom cover 12 can be matched along the axial limiting direction. At this time, the spacing between the annular portion 212 and the bottom cover 12 is set to d5. Therefore, when the rotating shaft 22 moves axially upward to the first limit position, the limiting end plate 31 and the end cover portion 211 are matched to limit the first support bearing 51, and the first buffer component 61 is squeezed by the first support bearing 51. At this time, the first buffer component 61 is partially compressed by the first support bearing 51. When the rotating shaft 22 moves downward along the axis to the second limit position, the annular portion 212 is limitedly matched with the bottom cover 12 , and the second support bearing 52 squeezes the second buffer component 62 . At this time, the second buffer component 62 is partially compressed by the second support bearing 52 .

[0094] Optionally, combined Figure 6The outer rotor motor 100 further includes a second stopper 4, which is disposed on the end cover 211 and between the end cover 211 and the stopper end plate 31. The stopper end plate 31 and the second stopper 4 can be matched in an axial direction. At this time, the spacing between the stopper end plate 31 and the second stopper 4 is set to d2. The annular portion 212 and the bottom cover 12 can be matched in an axial direction. At this time, the spacing between the annular portion 212 and the bottom cover 12 is set to d5. Therefore, when the rotating shaft 22 moves upward in the axial direction to the first limit position, the stopper end plate 31 and the second stopper 4 are matched in a limit position, and the first support bearing 51 squeezes the first buffer component 61. At this time, the first buffer component 61 is partially compressed by the first support bearing 51. When the rotating shaft 22 moves downward in the axial direction to the second limit position, the annular portion 212 and the bottom cover 12 are matched in a limit position, and the second support bearing 52 squeezes the second buffer component 62. At this time, the second buffer component 62 is partially compressed by the second support bearing 52.

[0095] In some embodiments of the present application, Figure 1 and Figure 6 The outer rotor motor 100 also includes a third limit member 71 and a fourth limit member 72. The third limit member 71 is sleeved on the rotating shaft 22 and clamped on the side of the first support bearing 51 away from the bearing shoulder 112; the fourth limit member 72 is sleeved on the rotating shaft 22 and clamped on the side of the second support bearing 52 away from the bearing shoulder 112.

[0096] In the above technical solution, the third stopper 71 is arranged to be clamped on the side of the first support bearing 51 away from the bearing shoulder 112 to limit the movement of the first support bearing 51 on the rotating shaft 22, so as to prevent the first support bearing 51 from sliding relative to the rotating shaft 22 or detaching from the rotating shaft 22, thereby ensuring the installation stability of the first support bearing 51. The fourth stopper 72 is arranged to be clamped on the side of the second support bearing 52 away from the bearing shoulder 112 to limit the movement of the second support bearing 52 on the rotating shaft 22, so as to prevent the second support bearing 52 from sliding relative to the rotating shaft 22 or detaching from the rotating shaft 22, thereby ensuring the installation stability of the second support bearing 52. In this way, the matching stability between the rotating shaft 22 and the stator 11 can be improved, which is conducive to improving the reliability of the outer rotor motor 100.

[0097] In a second aspect, an embodiment of the present application provides a fan component 200 , including a crossflow impeller 101 and an outer rotor motor 100 according to the embodiment of the first aspect of the utility model, wherein the outer rotor motor 100 is connected to one axial end of the crossflow impeller 101 .

[0098] In the above technical solution, the use of the above outer rotor motor 100 is beneficial to improving the stability of the fan component 200 .

[0099] For example, combined with Figure 7-Figure 9The fan component 200 also includes a support seat 102, a motor mounting structure 103 and a chassis 104. The support seat 102 and the motor mounting structure 103 are located on both axial sides of the crossflow wind wheel 101. The motor mounting structure 103 includes a mounting seat 1031 and a pressure plate 1032. The outer rotor motor 100 is arranged between the mounting seat 1031 and the pressure plate 1032 to ensure the stable installation of the outer rotor motor 100. The chassis 104 has a mounting cavity for accommodating the crossflow wind wheel 101. One axial end of the crossflow wind wheel 101 (for example, the wind wheel shaft) is rotatably supported on the support seat 102, and the other axial end of the crossflow wind wheel 101 is connected to the outer rotor motor 100, and the rotating shaft 22 is transmission-connected to the crossflow wind wheel 101, so that the rotating shaft 22 can drive the crossflow wind wheel 101 to rotate synchronously. In this way, the crossflow impeller 101 rotates to drive the air flow, and the air flows through the evaporator of the air conditioner (such as the fins of the evaporator). After the evaporator exchanges heat, the air is blown to the room to cool or heat the room.

[0100] Optionally, the connection manner between the outer rotor motor 100 and the chassis 104 is not limited thereto. For example, the chassis 104 is formed with a receiving cavity, and the receiving cavity receives the outer rotor motor 100 .

[0101] It should be noted that the chassis 104 is the basic base of the air conditioner, and the chassis 104 is used to support or fasten the evaporator, crossflow impeller 101, outer rotor motor 100, electric control box, housing and other components of the air conditioner to ensure the stability of the overall structure of the air conditioner.

[0102] In a third aspect, an embodiment of the present application provides an air conditioner, comprising a fan component 200 according to the embodiment of the third aspect of the utility model.

[0103] In the above technical solution, the use of the above-mentioned fan component 200 is helpful to improve the working stability of the air conditioner.

[0104] In the description of this specification, the description with reference to the terms "embodiment", "example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0105] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. An outer rotor motor, characterized in that: include: A stator assembly, the stator assembly comprising a stator, the stator having a central hole; A rotor assembly, the rotor assembly comprising a housing and a rotating shaft, the housing rotatably covers the outer side of the stator, the rotating shaft is connected to the housing and penetrates the center hole, the rotating shaft and the stator are rotatably matched through a bearing matched in the center hole and sleeved on the outside of the rotating shaft; A first limiting member is connected to the stator assembly, and the first limiting member cooperates with the housing in an axial limiting manner to limit a first limit position of the rotating shaft.

2. The outer rotor motor according to claim 1, characterized in that: The stator assembly includes a bottom cover arranged on one axial side of the stator, the housing includes an end cover portion arranged on the other axial side of the stator, and the housing also includes an annular portion surrounding the circumference of the stator and connected to the edge of the end cover portion; The first limiting member is connected to the bottom cover, and a portion of the first limiting member blocks a side of the end cover portion or the annular portion away from the bottom cover.

3. The outer rotor motor according to claim 2, characterized in that: The housing includes a flange portion disposed on the outer circumferential side of the annular portion, and a portion of the first limiting member is located on a side of the flange portion away from the bottom cover.

4. The outer rotor motor according to claim 3, characterized in that: The flange portion is annular and surrounds the circumference of the stator; The first limiting member is annular, or a plurality of the first limiting members are arranged at intervals along the circumference of the housing.

5. The outer rotor motor according to claim 2, characterized in that: The first limiting member comprises: A limiting end plate, the limiting end plate is located at a side of the end cover portion away from the bottom cover, and the limiting end plate is provided with an avoidance hole for avoiding the rotating shaft; A limit connecting plate is used to connect the edge of the limit end plate and the bottom cover.

6. The outer rotor motor according to claim 5, characterized in that: The limiting connecting plate is cylindrical and is arranged around the circumference of the stator.

7. The outer rotor motor according to claim 5, characterized in that: At least one of the limiting end plate and the limiting connecting plate is provided with a hollow hole.

8. The outer rotor motor according to claim 5, characterized in that: Also includes: A second limiting member is located between the end cover and the limiting end plate to limit the first limit position of the rotating shaft, and the second limiting member is connected to the housing or the rotating shaft.

9. The outer rotor motor according to claim 8, characterized in that: The second limiting member is annular and is disposed on the rotating shaft.

10. The outer rotor motor according to any one of claims 1 to 9, characterized in that: The stator includes a bearing shoulder protruding into the center hole, and the bearing includes a first support bearing and a second support bearing arranged on both axial sides of the bearing shoulder, and the second support bearing is close to the matching position of the housing and the rotating shaft.

11. The outer rotor motor according to claim 10, characterized in that: A first buffer component is provided between the first support bearing and the bearing shoulder, and the first buffer component is configured to have a compression margin when the rotating shaft reaches the first limit position.

12. The outer rotor motor according to claim 10, characterized in that: When the stator assembly includes a bottom cover disposed on one axial side of the stator, the housing includes an annular portion surrounding the circumference of the stator, and the annular portion and the bottom cover are used to limit the second limit position of the rotating shaft; A second buffer component is provided between the second support bearing and the bearing shoulder, and the second buffer component is configured to have a compression margin when the rotating shaft reaches the second limit position.

13. The outer rotor motor according to claim 10, characterized in that: Also includes: a third limiting member, the third limiting member being sleeved on the rotating shaft and clamped on a side of the first supporting bearing away from the bearing shoulder; A fourth limiting member is sleeved on the rotating shaft and clamped on a side of the second supporting bearing away from the bearing shoulder.

14. A fan component, characterized in that: It comprises a crossflow wind wheel and an outer rotor motor according to any one of claims 1 to 13, wherein the outer rotor motor is connected to one axial end of the crossflow wind wheel.

15. An air conditioner, characterized in that: Comprising the fan component according to claim 14.

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