Motor and method for assembling motor

Abstract

The embodiment of the invention provides a motor and an assembling method of the motor, and the motor comprises the components of a rotor which comprises a rotating shaft which rotates with a central axis as a center, a rotor frame which is arranged at the axial upper end of the rotating shaft and rotates along with the rotating shaft, and a magnet which is configured on the rotor frame; and a stator; the motor further comprises a first fixing part which is arranged between the rotor frame and the magnet and is used for preliminarily fixing the rotor frame and the magnet; and the second fixing part is arranged between the rotor frame and the magnet, and performs secondary fixing on the rotor frame and the magnet after the first fixing part performs the primary fixing. Therefore, after the rotor frame and the magnet are primarily fixed through the first fixing part, the rotor frame and the magnet are secondarily fixed through the second fixing part, the situation that the coaxiality is reduced due to the fact that the rotor frame and the magnet deviate in the secondary fixing process is avoided, and therefore high-frequency noise generated when the motor operates is reduced.

Description

Technical Field

[0001] The present application relates to the field of electromechanics, and in particular to a motor and a method for assembling a motor. Background Art

[0002] Motors are a common power source and have a wide range of applications. For example, they can be used in household appliances such as fans and sweeping robots.

[0003] Taking a sweeping robot as an example, a motor is needed in the sweeping robot to provide driving force for the driving wheels of the sweeping robot, and a motor is also needed to provide suction force for the vacuuming function of the sweeping robot. Moreover, since the sweeping robot has high requirements for vacuuming performance, the performance requirements for the motor are also high.

[0004] It should be noted that the above introduction to the technical background is only for the convenience of providing a clear and complete description of the technical solutions of the present application and for the convenience of understanding by those skilled in the art. It cannot be considered that the above technical solutions are well known to those skilled in the art simply because they are described in the background technology section of the present application. Summary of the invention

[0005] The inventors have found that the rotor magnets of the motor are usually bonded to the rotor frame with adhesive. On the one hand, it takes some time for the adhesive to solidify. While waiting for the adhesive to solidify, the magnets and the rotor frame may be offset. In addition, when the magnets are placed on the rotor frame, eccentricity may occur, resulting in a decrease in the coaxiality between the magnets and the rotor frame. On the other hand, the gap between the magnets and the rotor frame may have an insufficient filling rate, which may cause high-frequency noise in the motor during operation.

[0006] In response to at least one of the above problems or other similar problems, an embodiment of the present application provides a motor and a method for assembling a motor.

[0007] According to a first aspect of an embodiment of the present application, a motor is provided, the motor comprising: a rotor, comprising a rotating shaft rotating about a central axis, a rotor frame arranged at an axial upper end of the rotating shaft and rotating with the rotating shaft, and a magnet arranged on the rotor frame; and a stator, which is arranged opposite to the rotor in a radial direction;

[0008] The motor further includes: a first fixing portion, which is disposed between the rotor frame and the magnet and performs preliminary fixing on the rotor frame and the magnet; and a second fixing portion, which is disposed between the rotor frame and the magnet and performs secondary fixing on the rotor frame and the magnet after the first fixing portion performs the preliminary fixing.

[0009] According to a second aspect of an embodiment of the present application, a method for assembling a motor is provided, wherein the motor comprises: a rotor, which comprises a rotating shaft rotating about a central axis, a rotor frame disposed at one axial end of the rotating shaft and rotating with the rotating shaft, and a magnet disposed on the rotor frame; and a stator, which is disposed opposite to the rotor in a radial direction, wherein the method comprises:

[0010] Applying a first adhesive on the inner circumferential surface of the rotor frame;

[0011] Arrange the magnet on a concentric fixture;

[0012] Applying a second adhesive on the outer circumference of the magnet, wherein the curing time of the second adhesive is different from the curing time of the first adhesive;

[0013] The rotor frame coated with the first adhesive is inserted into the concentric jig on which the magnet is arranged.

[0014] One beneficial effect of the embodiments of the present application is that after the rotor frame and the magnet are initially fixed by the first fixing part, the rotor frame and the magnet are secondarily fixed by the second fixing part, so as to avoid the rotor frame and the magnet being offset during the secondary fixing and causing the coaxiality to decrease, thereby reducing the high-frequency noise when the motor is running.

[0015] With reference to the following description and accompanying drawings, the specific embodiments of the present application are disclosed in detail, indicating the way in which the principles of the present application can be adopted. It should be understood that the embodiments of the present application are not limited in scope. Within the scope of the spirit and clauses of the appended claims, the embodiments of the present application include many changes, modifications and equivalents. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The included drawings are used to provide a further understanding of the embodiments of the present application, which constitute a part of the specification, are used to illustrate the implementation methods of the present application, and together with the text description, explain the principles of the present application. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. In the drawings:

[0017] Figure 1 is a three-dimensional diagram of a motor according to an embodiment of the present application;

[0018] Figure 2 is a cross-sectional view of a rotor according to an embodiment of the present application;

[0019] Figure 3 is a schematic diagram of an implementation of a rotor of an embodiment of the present application;

[0020] Figure 4is a three-dimensional diagram of an implementation manner of a magnet of a rotor of an embodiment of the present application;

[0021] Figure 5 is a three-dimensional diagram of another embodiment of the magnet of the rotor of the embodiment of the present application;

[0022] Figure 6 is a schematic diagram of an assembly method of an embodiment of the present application;

[0023] Figure 7 It is a schematic diagram of a process of assembling a motor using a concentric jig;

[0024] Figure 8 It is a schematic diagram of another process of assembling a motor using a concentric jig;

[0025] Fig. 9 yes Figure 8 A perspective view of the assembled state is shown. DETAILED DESCRIPTION

[0026] With reference to the accompanying drawings, the above and other features of the present application will become apparent through the following description. In the description and the accompanying drawings, specific embodiments of the present application are specifically disclosed, which show some embodiments in which the principles of the present application can be adopted. It should be understood that the present application is not limited to the described embodiments. On the contrary, the present application includes all modifications, variations and equivalents falling within the scope of the attached claims.

[0027] In the embodiments of the present application, the terms "first", "second", "upper", "lower", etc. are used to distinguish different elements in terms of title, but do not indicate the spatial arrangement or time order of these elements, etc., and these elements should not be limited by these terms. The term "and / or" includes any one and all combinations of one or more of the associated listed terms. The terms "comprising", "including", "having", etc. refer to the presence of the stated features, elements, components or components, but do not exclude the presence or addition of one or more other features, elements, components or components.

[0028] In the embodiments of the present application, the singular forms "a", "the", etc. include plural forms and should be broadly understood as "a kind" or "a type" rather than being limited to the meaning of "one"; in addition, the term "said" should be understood to include both singular and plural forms, unless the context clearly indicates otherwise. In addition, the term "according to" should be understood as "at least in part according to...", and the term "based on" should be understood as "at least in part based on...", unless the context clearly indicates otherwise.

[0029] In addition, in the following description of the present application, for the convenience of explanation, the radial direction centered on the central axis OO of the rotating shaft of the motor is referred to as "radial", the side away from the central axis OO along the radial direction is referred to as "radial outer side", the side close to the central axis OO along the radial direction is referred to as "radial inner side", the direction around the central axis is referred to as "circumferential", and the direction along the central axis or parallel to it is referred to as "axial" or "axial extension direction".

[0030] The embodiments of the present application are described below with reference to the accompanying drawings.

[0031] The present application embodiment provides a motor, Figure 1 is a three-dimensional diagram of a motor according to an embodiment of the present application, Figure 2 is a cross-sectional view of a rotor according to an embodiment of the present application.

[0032] like Figure 1 As shown, the motor 1 includes a rotor 10 and a stator (not shown in the figure), and the stator is arranged opposite to the rotor 10 in the radial direction. The implementation method of the stator can refer to the relevant technology, and the embodiment of the present application does not limit this.

[0033] In addition, if Figure 1 As shown, the motor 1 may further include a balance ring 40 for correcting dynamic balance, a connection terminal 50 for providing power, etc., and the implementation thereof may refer to the relevant technology, and the embodiment of the present application is not limited to this.

[0034] Next, an embodiment of the rotor 10 will be described.

[0035] like Figure 2 As shown, the rotor 10 includes a rotating shaft 110 , a rotor frame 120 and a magnet 130 . The rotating shaft 110 rotates around a central axis OO. The rotor frame 120 is disposed at an axial upper end of the rotating shaft 110 and rotates with the rotating shaft 110 . The magnet 130 is disposed on the rotor frame 120 .

[0036] In the embodiment of the present application, for the convenience of explanation, the end of each part axially close to the top of the rotor frame 120 is called the "axial upper end", and the end opposite to the "axial upper end" is called the "axial lower end". It should be noted that the "upper end" and "lower end" in the embodiment of the present application are for distinguishing the ends of each part in terms of name, and do not indicate the spatial order.

[0037] In some embodiments, Figure 2 As shown, motor 1 ( Figure 2The rotor frame 120 and the magnet 130 are provided with a first fixing portion 20 and a second fixing portion 30, wherein the first fixing portion 20 performs preliminary fixing on the rotor frame 120 and the magnet 130, and the second fixing portion 30 performs secondary fixing on the rotor frame 120 and the magnet 130 after the first fixing portion 20 performs preliminary fixing.

[0038] Therefore, after the rotor frame 120 and the magnet 130 are initially fixed by the first fixing part 20, the rotor frame 120 and the magnet 130 are secondarily fixed by the second fixing part 30, so as to avoid the rotor frame 120 and the magnet 130 from being offset during the second fixing and causing the coaxiality to decrease, thereby reducing the high-frequency noise when the motor is running.

[0039] In addition, Figure 2 In the figure, only the first fixing part 20 and the second fixing part 30 are schematically shown, but those skilled in the art should understand that as long as the first fixing part 20 and the second fixing part 30 can achieve primary fixing and secondary fixing, the embodiment of the present application does not limit the implementation of the first fixing part 20 and the second fixing part 30. For example, the first fixing part 20 can be implemented by an adhesive, or by a mechanical structure such as a snap fit or an interference fit; the second fixing part 30 can be implemented by an adhesive, or by a mechanical structure such as a snap fit or an interference fit.

[0040] The following are explanations respectively.

[0041] Figure 3 is a schematic diagram of an implementation of a rotor in an embodiment of the present application, Figure 3 The case where both the first fixing portion and the second fixing portion are implemented by an adhesive is shown.

[0042] In some embodiments, Figure 3 As shown, the first fixing portion 20 ( Figure 3 The rotor frame 120 may include a first adhesive 210 applied to the inner circumferential surface 121 of the rotor frame 120, a second fixing portion 30 ( Figure 3 The first adhesive 210 and the second adhesive 310 have different curing times. For example, the curing time of the first adhesive 210 is shorter than the curing time of the second adhesive 310, for example, the first adhesive 210 is an instant adhesive, and the second adhesive 310 is a delayed adhesive. Thus, since the first adhesive is an instant adhesive, the magnet can be positioned with high precision. In this way, the concentricity can be ensured when the magnet is assembled with the rotating shaft and the rotor frame. In addition, by positioning the magnet with high precision relative to the rotor frame, the effect of reducing noise can be achieved.

[0043] In the above example, the axial upper end of the first adhesive 210 is axially higher than the axial upper end of the second adhesive 310. For example, when the magnet 130 is not disposed on the rotor frame 120, the first adhesive 210 is applied to the axially upper region of the inner circumferential surface 121 of the rotor frame 120, and the second adhesive 310 is applied to the axially lower region of the outer circumferential surface 131 of the magnet 130; when the magnet 130 is pushed into the rotor frame 120, the axial upper end of the outer circumferential surface 131 of the magnet 130 contacts the first adhesive 210, and as the magnet 130 moves further relative to the rotor 120, the axial contact area between the first adhesive 210 and the outer circumferential surface 131 of the magnet 130 increases further, until the magnet 130 moves to the set position, the first adhesive 210 solidifies before the second adhesive 310 to achieve preliminary fixation, and as the second adhesive 310 solidifies, the magnet 130 and the rotor frame 120 are fixed. In addition, the first adhesive 210 and the second adhesive 310 may be continuous or discontinuous in the circumferential direction, that is, the adhesive may be applied only in at least a portion of the circumferential direction.

[0044] In some embodiments, Figure 3 As shown, the distance D1 between the axial lower end of the first adhesive 210 and the axial upper end of the outer peripheral surface 131 of the magnet 130 is less than 50% of the axial height L of the outer peripheral surface 131 of the magnet 130. For example, the first adhesive 210 covers the axial upper end of the outer peripheral surface 131 of the magnet 130, and the axial height covered by the first adhesive 210 on the outer peripheral surface 131 is L1, and L1 is less than 50% of L, for example, L1 is less than 15% of L. In addition, in the above example, L1 can also be greater than 0.5 mm. In this way, the bonding effect of the first adhesive is guaranteed, and the burden of assembly due to too much first adhesive is avoided.

[0045] In the above embodiment, the axial upper end of the first adhesive 210 can be located at the same axial height as the axial upper end of the magnet 130, but the present application is not limited thereto. The axial upper end of the first adhesive 210 can also be slightly lower than the axial upper end of the magnet 130.

[0046] In some embodiments, Figure 3As shown, the distance D2 between the axial upper end of the second adhesive 310 and the axial lower end of the outer peripheral surface 131 of the magnet 130 is more than 50% of the axial height L of the outer peripheral surface 131 of the magnet 130. For example, the second adhesive 310 covers the axial lower end of the outer peripheral surface 131 of the magnet 130, and the axial height covered by the second adhesive 310 on the outer peripheral surface 131 is L2, and L2 is more than 50% of L, for example, L2 is more than 85% of L. In addition, in the above example, L2 can also be shorter than L by more than 0.5 mm. In this way, the bonding effect of the second adhesive is guaranteed, and the burden of assembly due to too much second adhesive is avoided.

[0047] In some embodiments, the axial lower end of the second adhesive 310 is flush with the axial lower end of the portion where the outer circumferential surface 131 of the magnet 130 contacts the inner circumferential surface 121 of the rotor frame 120 , or is axially lower than the axial lower end of the portion.

[0048] For example, Figure 3 As shown, the axial lower end of the magnet 130 may be flush with the axial lower end of the rotor frame 120, and the axial lower end of the second adhesive 310 may be flush with the axial lower end of the magnet 130. In addition, when the axial lower end of the rotor frame 120 has a chamfer, the second adhesive 310 may also be filled into the gap g between the magnet 130 and the chamfer of the rotor frame 120. In addition, the axial lower end of the magnet 130 may also be closer to the axial lower side than the axial lower end of the rotor frame 120, and the axial lower end of the second adhesive 310 may be flush with the axial lower end of the rotor frame 120.

[0049] As a result, the filling degree of the gap between the magnet 130 and the rotor frame 120 by the second adhesive 310 is increased, thereby further suppressing high-frequency sound during the rotation of the motor.

[0050] In the above embodiment, if Figure 3 As shown, the first adhesive 210 may overlap with the second adhesive 310 in at least a portion in the axial direction. Thus, the filling rate of the second adhesive 310 is increased, thereby further reducing the high-frequency noise when the motor is running. However, the embodiment of the present application is not limited thereto, and the first adhesive 210 may not overlap with the second adhesive 310. For example, the first adhesive 210 may be spaced apart from the second adhesive 310 in the axial direction; or, the first adhesive 210 and the second adhesive 310 may be connected in the axial direction.

[0051] In some embodiments, after the magnet 130 is disposed on the rotor frame 120, at least a portion of the first adhesive 210 may also be disposed on the end surface (i.e., the upper end surface) of the axial upper end of the magnet 130. For example, when the magnet 130 is pushed into the rotor frame 120, a portion of the first adhesive 210 is squeezed to the upper end surface of the magnet 130. Thus, high-frequency sound during the rotation of the motor can be further suppressed.

[0052] In some embodiments, Figure 3 As shown, after the magnet 130 is disposed on the rotor frame 120, the outer peripheral surface 131 of the magnet 130 is covered by the first adhesive 210 and the second adhesive 310. Thus, the gap between the magnet 130 and the rotor frame 120 is filled with the adhesive, further reducing the high-frequency noise during the operation of the motor.

[0053] The above describes the preliminary positioning by means of an adhesive, but the embodiments of the present application are not limited thereto, and the preliminary positioning may also be achieved by snapping. Figure 4 is a three-dimensional diagram of an embodiment of a magnet of a rotor of an embodiment of the present application, Figure 5 It is a three-dimensional view of another embodiment of the magnet of the rotor of the embodiment of the present application.

[0054] like Figure 4 and Figure 5 As shown, the first fixing portion 20 ( Figure 4 The rotor frame 120 (not shown) includes a plurality of protrusions 220 located on the outer peripheral surface 131 of the magnet 130. When the magnet 130 is pushed into the rotor frame 120, the plurality of protrusions 220 are engaged between the magnet 130 and the rotor frame 120, thereby fixing the magnet 130 on the rotor frame 120, thereby achieving preliminary fixation.

[0055] In some embodiments, the plurality of protrusions 220 are arranged at equal intervals in the circumferential direction, thereby ensuring that the magnet 130 is coaxial with the rotor frame 120, further reducing high-frequency noise during the operation of the motor.

[0056] in addition, Figure 4 and Figure 5 The difference is that Figure 4 The plurality of protrusions 220 are respectively disposed on both axial sides of the outer peripheral surface 131 of the magnet 130 and distributed at different positions in the circumferential direction. Figure 5 The plurality of protrusions 220 extend axially from one end to the other end on the outer peripheral surface 131 of the magnet 130. However, the embodiments of the present application are not limited thereto. For example, Figure 4 The magnet 130 may also include only the protrusion 220 located on the axial upper side, or, Figure 5 The protrusion 220 in the magnet 130 may also extend only in the middle region in the axial direction of the magnet 130 .

[0057] In addition, a plurality of protrusions may be formed on the inner circumferential surface of the rotor frame, and the plurality of protrusions may also achieve the same technical effect as the protrusion 220 of the magnet 130. The implementation of the plurality of protrusions is similar to that of the protrusion 220 and will not be described in detail here.

[0058] in addition, Figure 4 The magnet 130 includes six protrusions 220, Figure 5 The magnet 130 includes three protrusions 220, but the embodiment of the present application is not limited thereto, and any number of protrusions can be provided as required. Figure 4 and Figure 5 In the example, a columnar protrusion is taken as an example, but the present application is not limited thereto, and the protrusion may also be set to other shapes, such as a mound shape, a ring shape, and the like.

[0059] In the above example, the second fixing portion 30 may include an adhesive that fills the gap between the outer circumferential surface of the magnet 130 and the inner circumferential surface of the rotor 120. Thus, high-frequency noise during operation of the motor is further reduced.

[0060] It can be seen from the above embodiments that the rotor frame and the magnet are initially fixed by the first fixing part and then fixed by the second fixing part, so as to avoid the rotor frame and the magnet being offset during the secondary fixing and causing the coaxiality to decrease, thereby reducing the high-frequency noise when the motor is running.

[0061] The embodiment of the present application also provides a method for assembling a motor. The motor to which the assembly method is applicable includes, for example: a rotor, which includes a rotating shaft rotating around a central axis, a rotor frame arranged at one axial end of the rotating shaft and rotating with the rotating shaft, and a magnet arranged on the rotor frame; and a stator, which is arranged opposite to the rotor in the radial direction. In addition, the assembly method of the embodiment of the present application can be applied to both outer rotor motors and inner rotor motors, and the embodiment of the present application does not limit this.

[0062] Figure 6 Schematic diagram of the assembly method of the embodiment of the present application. Figure 6 As shown, the method includes:

[0063] 601: applying a first adhesive on the inner circumferential surface of the rotor frame;

[0064] 602: placing the magnet on a concentric fixture;

[0065] 603: applying a second adhesive on the outer circumferential surface of the magnet, wherein the curing time of the second adhesive is different from the curing time of the first adhesive;

[0066] 604: Insert the rotor frame coated with the first adhesive into the concentric fixture configured with the magnet.

[0067] Therefore, the rotor frame and the magnet are assembled with the aid of a concentric jig to improve the coaxiality of the rotor frame and the magnet, thereby reducing the high-frequency noise when the motor is running.

[0068] The assembly method of the embodiment of the present application is described below by taking the motor 1 in the above embodiment as an example. The specific structure of the motor 1 can refer to the various implementation methods described in the above embodiment, and will not be repeated here.

[0069] Figure 7 and Figure 8 This is a schematic diagram of the process of assembling a motor using a concentric jig. Fig. 9 yes Figure 8 A perspective view of the assembled state is shown.

[0070] like Figure 8 As shown, the concentric jig 7 includes a cylindrical main body 70 and a hollow part 80 located radially inside the main body 70 and concentric with the main body 70. The embodiment of the present application does not limit the size and shape of the concentric jig 7, and can be set according to the size and shape of the rotor of the motor to be assembled. For example, the outer diameter of the main body 70 is not greater than the inner diameter of the magnet 130. For example, the axial upper end of the main body 70 is conical, and the closer to the axial upper end, the smaller the diameter of the cone, which is convenient for placing the magnet 130; the inner diameter of the hollow part 80 is not less than the diameter of the rotating shaft 110. For example, a bearing 810 is provided in the hollow part 80, and the inner diameter of the bearing 810 is not less than the diameter of the rotating shaft 110. As a result, the concentricity of the rotating shaft 110 and the concentric jig 7 is improved by the bearing 810, thereby improving the coaxiality of the rotor frame 120 and the magnet 130 when they are matched. In addition, a cylindrical elastic portion may also be provided in the hollow portion 80, and the thickness of the elastic portion may be set, for example, as follows: when the elastic portion is in a normal state, the inner diameter of the elastic portion is slightly smaller than the diameter of the rotating shaft 110, and when the elastic portion is in a compressed state, the inner diameter of the elastic portion is greater than or equal to the diameter of the rotating shaft 110. Thus, when the rotating shaft 110 is inserted into the hollow portion 80, the elastic portion is compressed to generate an elastic force, which holds the rotating shaft 110 to prevent the rotating shaft 110 from shaking, thereby avoiding the magnet 130 and the rotating shaft 110 from being offset during assembly, thereby causing a decrease in coaxiality.

[0071] Combine the following Figures 7 to 9 The assembly method of the embodiment of the present application is described.

[0072] In step 601, Figure 7As shown, the first adhesive 210 is coated on the inner circumferential surface 121 of the rotor frame 120. For example, the first adhesive 210 is coated on at least a portion of the circumferential range of the inner circumferential surface 121. In addition, the axial coverage of the first adhesive 210 can be determined according to the axial height of the magnet 130. For example, the axial coverage of the first adhesive 210 can be less than half of the axial height of the magnet 130, for example, it can be 15% of the axial height of the magnet 130. Thus, the filling rate of the second adhesive 310 is increased by reducing the proportion of the first adhesive 210. In addition, the axial coverage of the first adhesive 210 can be greater than 0.5 mm, thereby ensuring the strength of the initial fixation. In addition, the axial upper side of the first adhesive 210 is kept as close to the top surface of the rotor frame 120 as possible. For example, as shown in FIG. Figure 7 As shown, the distance D3 between the axial upper end of the first adhesive 210 and the axial upper end of the inner circumferential surface 121 of the rotor frame 120 is greater than 0, for example, D3 is greater than 5 mm. Thus, the rotor frame 120 and the magnet 130 are fixed by the first adhesive 210 .

[0073] In step 602, if Figure 7 As shown, the magnet 130 is disposed on the concentric jig 7 , for example, the annular magnet 130 is sleeved on the main body 70 of the concentric jig 7 .

[0074] In step 603, if Figure 7 As shown, the second adhesive 310 is applied to the outer circumferential surface 131 of the magnet 130, and the curing time of the second adhesive 310 is different from the curing time of the first adhesive 210. For example, the curing time of the second adhesive 310 is longer than the curing time of the first adhesive 210. In addition, the second adhesive 310 is applied to at least a portion of the circumferential direction of the outer circumferential surface 131. In addition, the axial coverage of the second adhesive 310 can be determined according to the axial height of the magnet 130. For example, the axial coverage of the second adhesive 310 can be more than half of the axial height of the magnet 130, for example, it can be 85% of the axial height of the magnet 130, thereby improving the filling rate of the gap between the magnet 130 and the rotor frame 120, and further reducing the high-frequency noise when the motor is running. In addition, the axial coverage of the second adhesive 310 is smaller than the axial height of the magnet 130 by more than 0.5 mm. For example, on the outer surface 131 of the magnet 130, the portion within 0.5 mm from the axial upper end of the magnet 130 is not coated with the second adhesive 310. This portion is used to contact with the first adhesive 210 and be initially fixed to the rotor frame 120 when the magnet 130 is arranged on the rotor frame 120. In addition, the axial lower side of the second adhesive 310 can be as close to the axial lower end of the magnet 130 as possible, for example, Figure 7As shown, the distance between the axial lower end of the second adhesive 310 and the axial lower end of the outer peripheral surface 131 of the magnet 130 is D4, for example, D4 ​​is less than 5 mm. Thus, the filling rate of the second adhesive 310 is increased, thereby further reducing the high-frequency noise when the motor is running.

[0075] In step 604, the rotor frame 120 coated with the first adhesive 210 is inserted into the concentric jig equipped with the magnet 130, that is, the rotor frame 210 and the rotating shaft 110 are assembled in advance. In this step, the rotating shaft 110 assembled with the rotor frame 120 is inserted into the hollow portion 80 of the concentric jig 7, as shown in FIG. Figure 8 and Fig. 9 As shown, the rotating shaft 110 is inserted into the concentric fixture 7, and the rotor frame 120 and the magnet 130 ( Fig. 9 (not shown) in the first adhesive 210 ( Fig. 9 It is initially fixed by the action of (not marked in the figure).

[0076] In addition, the assembly method of the embodiment of the present application may further include curing the second adhesive 310. For example, in step 604, after the first adhesive 210 is cured, the combination of the magnet 130 and the rotor frame 120 is removed from the concentric fixture 7 and placed in a drying oven to dry and cure the second adhesive 310, thereby further fixing the magnet 130 and the rotor frame 120.

[0077] In the embodiment of the present application, the execution order of steps 601 to 604 can be adjusted as needed. For example, since the curing time of the first adhesive 210 is short, steps 602 and 603 can be executed before step 601.

[0078] In some embodiments, the assembly method of the embodiment of the present application may further include assembling the balance ring 40. For example, before step 601, the balance ring 40 is pressed into the rotor frame 120. In addition, an adhesive may be applied to the outer circumference of the rotor frame 120 before pressing the balance ring 40. The assembly method of the balance ring 40 may refer to the relevant technology, and the embodiment of the present application is not limited thereto.

[0079] In addition, the assembly method of the embodiment of the present application may also include assembling other components of the motor. The embodiment of the present application does not limit the implementation method of assembling other components, and the specific implementation method can refer to the relevant technology.

[0080] It can be seen from the above embodiments that the rotor frame and the magnet are assembled with the aid of a concentric jig, thereby improving the coaxiality of the rotor frame and the magnet, thereby reducing high-frequency noise during the operation of the motor.

[0081] The present application is described above in conjunction with specific implementation methods, but it should be clear to those skilled in the art that these descriptions are exemplary and are not intended to limit the scope of protection of the present application. Those skilled in the art can make various modifications and variations to the present application based on the spirit and principles of the present application, and these modifications and variations are also within the scope of the present application.

Claims

1. A motor, comprising: A rotor including a rotating shaft rotating about a central axis, a rotor frame disposed at an axial upper end of the rotating shaft and rotating along with the rotating shaft, and a magnet disposed on the rotor frame; and a stator, which is arranged opposite to the rotor in a radial direction; It is characterized in that The motor further comprises: A first fixing portion, which is disposed between the rotor frame and the magnet, and performs preliminary fixing of the rotor frame and the magnet; and The second fixing part is arranged between the rotor frame and the magnet, and performs secondary fixing on the rotor frame and the magnet after the first fixing part performs the primary fixing.

2. The motor according to claim 1, wherein: The first fixing portion includes a first adhesive applied to the inner circumferential surface of the rotor frame. The second fixing portion includes a second adhesive coated on the outer peripheral surface of the magnet, The first adhesive and the second adhesive have different curing times.

3. The motor according to claim 2, wherein: The first adhesive and the second adhesive at least partially overlap in the axial direction.

4. The motor according to claim 2, wherein: A distance between an axial lower end of the first adhesive and an axial upper end of the outer peripheral surface of the magnet is less than or equal to 50% of an axial height of the outer peripheral surface of the magnet.

5. The motor according to claim 2, wherein: A distance between an axial upper end of the second adhesive and an axial lower end of the outer peripheral surface of the magnet is greater than or equal to 50% of an axial height of the outer peripheral surface of the magnet.

6. The motor according to claim 2, wherein: After the magnet is disposed on the rotor frame, at least a portion of the first adhesive is disposed on an end surface of an axial upper end of the magnet.

7. The motor according to claim 2, wherein: After the magnet is arranged on the rotor frame, the outer peripheral surface of the magnet is covered with the first adhesive and the second adhesive.

8. The motor according to any one of claims 2 to 7, wherein: The first adhesive is an instant adhesive, and the second adhesive is a delayed-release adhesive.

9. The motor according to claim 1, wherein: The first fixing portion includes a plurality of protrusions located on the inner circumferential surface of the rotor frame and / or a plurality of protrusions located on the outer circumferential surface of the magnet. The second fixing portion includes an adhesive filling a gap between an outer peripheral surface of the magnet and an inner peripheral surface of the rotor.

10. The motor according to claim 9, characterized in that The plurality of projections are arranged at equal intervals in the circumferential direction.

11. A method for assembling a motor, the motor comprising: A rotor, comprising a rotating shaft rotating about a central axis, a rotor frame disposed at one axial end of the rotating shaft and rotating with the rotating shaft, and a magnet disposed on the rotor frame; and a stator, which is arranged opposite to the rotor in a radial direction, wherein the method comprises: Applying a first adhesive on the inner circumferential surface of the rotor frame; Arrange the magnet on a concentric fixture; Applying a second adhesive on the outer circumference of the magnet, wherein the curing time of the second adhesive is different from the curing time of the first adhesive; The rotor frame coated with the first adhesive is inserted into the concentric jig on which the magnet is arranged.

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