Motor and fan

Abstract

The invention belongs to the technical field of motor manufacturing, and discloses a motor and a fan. The motor comprises a base, a bearing seat, a stator and a rotor, the bearing seat is connected with the base and extends in the axial direction, the stator comprises a stator body and a plurality of first convex parts, and the stator body is annular; the plurality of first convex parts are arranged at intervals along the inner circumference of the stator body, the bearing seat is inserted among the plurality of first convex parts, the outer circumference of the bearing seat is in interference fit with the free end of each first convex part, and the first convex parts are bent and deformed after the bearing seat is inserted so as to be in interference fit with the bearing seat. According to the motor and the fan, the plurality of first convex parts and the periphery of the bearing seat form an interference state, so that the bearing seat and the stator are fixed, glue is prevented from being used, and the stator fixing stability is improved. The stator and the bearing seat are fixed more stably, and meanwhile, a certain buffering effect is achieved when vibration occurs.

Description

Technical Field

[0001] The present invention relates to the technical field of motor manufacturing, and particularly relates to a motor and a fan. Background Art

[0002] Motors are applied in many aspects. In the prior art, there is a certain gap between the stator of the motor and the outer periphery of the bearing housing. In order to fix the stator, glue is filled in this gap, and generally two-component glue is used. However, in the process of use, the glue is likely to fall off in a high-temperature and high-humidity environment, resulting in the failure of the fan, and the equipment investment for two-component glue is expensive.

[0003] Therefore, there is an urgent need to design a motor and a fan to solve the above problems. Summary of the Invention

[0004] An object of the present invention is to provide a motor that can fix the stator at a lower cost, and at the same time, the fixing reliability of the stator in this way is stronger.

[0005] Another object of the present invention is to provide a fan that can fix the stator at a lower cost, and at the same time, the fixing reliability of the stator in this way is stronger.

[0006] To achieve this purpose, the present invention adopts the following technical solutions:

[0007] A motor, comprising:

[0008] A base and a bearing housing, the bearing housing is connected to the base and extends axially;

[0009] A stator and a rotor, the stator includes a stator body and a plurality of first convex portions, the stator body is annular; the plurality of first convex portions are arranged at intervals along the inner circumference of the stator body, the bearing housing is inserted between the plurality of first convex portions, the outer periphery of the bearing housing is in interference fit with the free end of each first convex portion, and the first convex portion is bent and deformed after the bearing housing is inserted to be in interference fit with the bearing housing, and the rotor is rotatably connected to the bearing housing through a bearing assembly.

[0010] As an optional solution, the plurality of first convex portions are formed by a ring-shaped deformable member, and the ring-shaped deformable member and the stator body are integrally formed by injection molding.

[0011] As an optional solution, the material of the ring-shaped deformable member is metal.

[0012] As an optional solution, a receiving groove is provided on the outer periphery of the bearing housing corresponding to each first convex portion, and at least a part of the first convex portion is received in the corresponding receiving groove.

[0013] As an optional solution, an abutment portion is formed between two adjacent accommodating grooves, and a plurality of second protrusions are also protruded from the inner ring of the stator body. The second protrusions are arranged at intervals along the inner circumference of the stator body, and each of the second protrusions elastically abuts against one of the abutment portions.

[0014] As an optional solution, a plurality of second protrusions are further provided on the circumferential side of the bearing seat, and the plurality of second protrusions abut against the inner side wall of the stator body.

[0015] As an optional solution, a cylindrical installation space is formed inside the bearing seat and an installation entrance is formed at one end, and a through opening with a diameter smaller than that of the installation space is opened at the other end of the bearing seat to form a limit portion at the other end of the bearing seat;

[0016] The bearing assembly includes a first bearing, a second bearing, and a stopper. The first bearing is installed into the installation space through the installation entrance and is limited by the limit portion. The second bearing is installed into the installation space through the installation entrance and is spaced apart from the first bearing. The stopper is interference-fitted into the installation space and abuts against a side of the second bearing facing away from the first bearing.

[0017] The rotating shaft of the rotor passes through the first bearing and the second bearing in sequence.

[0018] As an optional solution, the base and the bearing seat are injection molded in one step.

[0019] As an optional solution, the base and the bearing seat are made of the same material and are both plastic.

[0020] As an optional solution, the inner side wall of the bearing seat is provided with a plurality of first protrusions protruding inwardly, and the plurality of first protrusions are arranged at intervals along the inner side of the bearing seat, and the first protrusions extend axially along the bearing seat. The inner side walls of the first protrusions are adapted to the circumferential shape of the first bearing and / or the second bearing, and the first bearing is simultaneously in contact with the inner side walls of the plurality of first protrusions, and the second bearing is simultaneously in contact with the inner side walls of the plurality of first protrusions.

[0021] As an optional solution, the bearing assembly further comprises a spacer sleeve, one end of the spacer sleeve abuts against a side of the first bearing away from the limiting portion, and the other end of the spacer sleeve abuts against a side of the second bearing away from the stop member.

[0022] As an optional solution, the rotor includes a rotor body and a magnetic component. The rotor body is annular. The magnetic component is fixed to the inner side of the rotor body. The magnetic component is used for processing and removing weight.

[0023] The fan includes the above-mentioned motor, and the circumferential structure of the above-mentioned rotor is a plurality of fan blades arranged at intervals.

[0024] The beneficial effects of the present invention are as follows:

[0025] The present invention provides a motor. A number of first convex parts form an interference state with the outer circumference of the bearing seat to play a role in fixing the bearing seat and the stator, avoiding the use of glue and improving the stability of the stator fixation. Before the stator and the bearing seat are installed in place, the first convex part is in a flat plate shape. As the bearing seat is gradually inserted in place, the first convex part gradually bends. During this process, a certain internal stress is generated, which can improve the strength of the first convex part. At the same time, the elastic deformation of the first convex part increases, and the abutting force between the first convex part and the outer wall of the bearing is provided by the elastic force generated by the elastic deformation. The abutting force is greater, and the fixation of the stator and the bearing seat is more stable. At the same time, when vibration occurs, it plays a certain buffering role.

[0026] The present invention also provides a fan, including the above-mentioned motor, and the circumferential structure of the rotor is a plurality of fan blades arranged at intervals. By adopting the above-mentioned motor, the above-mentioned fan can fix the stator at a lower cost, and at the same time, the reliability of the stator fixation in this way is stronger. Description of the Drawings

[0027] Figure 1 is a schematic structural diagram of the bearing seat provided by an embodiment of the present invention;

[0028] Figure 2 is a schematic structural diagram of the assembly of the stator and the bearing seat provided by an embodiment of the present invention;

[0029] Figure 3 is a schematic structural diagram of the stator provided by an embodiment of the present invention;

[0030] Figure 4 is a schematic structural diagram of the annular deformation part provided by an embodiment of the present invention;

[0031] Figure 5 is a cross-sectional view of the stator and the bearing seat provided by an embodiment of the present invention;

[0032] Figure 6 is Figure 5 an enlarged view of part A in

[0033] Figure 7 is a cross-sectional view of the fan provided by an embodiment of the present invention;

[0034] Figure 8 is a half cross-sectional view of the fan provided by an embodiment of the present invention;

[0035] Figure 9 is a schematic structural diagram of the spacer provided by an embodiment of the present invention;

[0036] Figure 10 It is a schematic structural diagram of a rotor provided by an embodiment of the present invention.

[0037] In the figure:

[0038] 10. Outer shell; 11. Base; 20. Bearing housing; 22. Installation inlet; 23. Limiting part; 24. Through hole; 25. First protrusion; 26. Accommodation groove; 27. Abutting part; 28. Second protrusion;

[0039] 30. Bearing assembly; 31. First bearing; 32. Second bearing; 33. Spacer sleeve; 331. Support part; 332. First strengthening part; 333. Second strengthening part; 334. Through hole; 34. Stop member;

[0040] 40. Stator; 41. Stator body; 411. Second convex part; 42. Ring-shaped deformable member; 421. First convex part; 50. Rotor; 51. Rotating shaft; 52. Fan blade; 53. Spring; 54. Snap ring; 55. Rotor body; 56. Magnetic member; 561. Groove. Detailed implementation manners

[0041] The present invention will be further described in detail below with reference to the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the present invention, rather than limiting the present invention. In addition, it should be noted that for the convenience of description, only parts related to the present invention are shown in the drawings, rather than all structures.

[0042] In the description of the present invention, unless otherwise clearly defined and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0043] In the present invention, unless otherwise clearly defined and limited, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but are in contact through other features therebetween. Moreover, the first feature being "above", "above", and "on" the second feature includes that the first feature is directly above and obliquely above the second feature, or only means that the horizontal height of the first feature is higher than that of the second feature. The first feature being "below", "below", and "under" the second feature includes that the first feature is directly below and obliquely below the second feature, or only means that the horizontal height of the first feature is lower than that of the second feature.

[0044] In the description of this embodiment, the orientation or positional relationships such as "upper", "lower", "left", and "right" are based on the orientation or positional relationships shown in the drawings. They are only for convenience of description and simplifying the operation, 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. Therefore, it should not be construed as a limitation to the present invention. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0045] In the prior art, there is a certain gap between the stator and the outer periphery of the bearing housing. To fix the stator, glue is filled in this gap. Generally, two-component glue is used. However, during use, the glue is likely to fall off in a high-temperature and high-humidity environment, resulting in the failure of the fan, and the equipment investment for two-component glue is expensive.

[0046] As Figure 7 shown, exemplarily, this motor is applied to a fan. That is, the output end of the rotor 50 part is configured with a plurality of fan blades 52. In other embodiments, the motor rotor 50 can also output rotational kinetic energy in other forms, which is not limited herein.

[0047] To solve the above problems, as Figures 1 - 3 shown, the motor includes a base 11, a bearing housing 20, a stator 40, and a rotor 50. The bearing housing 20 is connected to the base 11 and extends axially. The stator 40 includes a stator body 41 and a plurality of first convex portions 421. The stator body 41 is annular; the plurality of first convex portions 421 are arranged at intervals along the inner circumference of the stator body 41. The bearing housing 20 is inserted between the plurality of first convex portions 421, and the outer periphery of the bearing housing 20 is in interference fit with the free end of each first convex portion 421. Through the above arrangement, the plurality of first convex portions 421 and the outer periphery of the bearing housing 20 are in an interference state, so as to play a role in fixing the bearing housing 20 and the stator 40, avoid using glue, and improve the stability of the stator 40 fixation.

[0048] It should be noted that, as Figure 7 shown, the base 11 is a part of the housing 10. The base 11 and the outer wall of the housing 10 are connected by a connecting section. The following description will be based on the base 11.

[0049] Optionally, as Figure 3As shown, after the bearing housing 20 is inserted, the first convex portion 421 is bent and deformed to achieve an interference fit with the bearing housing 20. With the above arrangement, before the stator 40 and the bearing housing 20 are installed in place, the first convex portion 421 is flat. As the bearing housing 20 is gradually inserted in place, the first convex portion 421 is gradually bent. During this process, certain internal stresses are generated, which can improve the strength of the first convex portion 421. At the same time, the elastic deformation of the first convex portion 421 increases, and the abutting force between the first convex portion 421 and the outer wall of the bearing is provided by the elastic force generated by the elastic deformation. The abutting force is greater, and the fixation between the stator 40 and the bearing housing 20 is more stable. At the same time, when vibration occurs, it plays a certain buffering role.

[0050] Optionally, referring to Figure 3 and Figure 4 , a plurality of first convex portions 421 are formed by a ring-shaped deformable member 42, and the ring-shaped deformable member 42 and the stator body 41 are integrally formed by injection molding. Thus, the manufacturing difficulty of the first convex portion 421 can be reduced.

[0051] Optionally, the material of the ring-shaped deformable member 42 is metal. Manufacturing with a metal material makes it easier for the first convex portion 421 to deform. Using a metal material and the abutting form of the first convex portion 421 reduces the contact area between the first convex portion 421 and the bearing housing 20, effectively adjusts the natural mode of the fan and the motor, reduces the transmission of damped vibration to the outside, effectively blocks the conduction of electromagnetic noise, and reduces the impact of motor noise on the outside. Canceling the fixation with two-component glue simplifies the assembly process, shortens the assembly time, reduces equipment investment, and reduces manufacturing costs.

[0052] In this embodiment, before the ring-shaped deformable member 42 is installed, the first convex portion 421 is flat. As the bearing housing 20 is installed in place, the bearing housing 20 bends the flat first convex portion 421, making the first convex portion 421 generally L-shaped. With such an arrangement, the first convex portion 421 still has a large elastic deformation after deformation, thereby increasing the abutting force of the first convex portion 421 against the outer periphery of the bearing housing 20, and thus ensuring that the abutting force between the bearing housing 20 and the stator 40 is sufficient.

[0053] In another embodiment, it can also be that the stator body 41 and a plurality of metal first convex portions 421 are integrally injection molded, which is not limited herein. In this embodiment, the use of the ring-shaped deformable member 42 forms a firm connection between a plurality of first convex portions 421 through a ring-shaped member, improving the earthquake resistance and anti-deformation ability of the first convex portion 421.

[0054] Optionally, referring to Figures 1 - 3, a receiving groove 26 is provided on the outer periphery of the bearing seat 20 corresponding to each first convex portion 421, and at least a part of the first convex portion 421 is received in the corresponding receiving groove 26. Thus, the receiving groove 26 can limit the installation of the stator 40 in the axial direction and simultaneously limit the relative rotation of the stator 40 in the circumferential direction.

[0055] Optionally, as Figure 2 and Figure 3 shown, a contact portion 27 is formed between two adjacent receiving grooves 26, and a plurality of second convex portions 411 are further protruded on the inner ring of the stator body 41. The second convex portions 411 are arranged at intervals along the inner circumference of the stator body 41, and each second convex portion 411 elastically abuts against a contact portion 27. Thus, the first convex portion 421 and the second convex portion 411 jointly abut against the bearing seat 20, further improving the installation stability of the stator 40 and the bearing seat 20.

[0056] Optionally, as Figure 1 , Figure 5 and Figure 6 shown, a plurality of second protrusions 28 are further protruded on the circumferential side of the bearing seat 20, and the plurality of second protrusions 28 abut against the inner side wall of the stator body 41, playing a role in assisting in fixing the stator 40.

[0057] It should be noted that the plurality of second protrusions 28 are located at the lower end of the bearing seat 20, while the contact portion 27 and the receiving groove 26 are located at the upper end of the bearing seat 20. With such an arrangement, the structures for fixing the stator 40 are reasonably distributed, and the fixing forces at the upper and lower ends of the stator 40 are balanced.

[0058] Optionally, as Figure 7 shown, the bearing assembly 30 includes a first bearing 31 and a second bearing 32. The first bearing 31 and the second bearing 32 are installed in the bearing seat 20 at intervals. In the prior art, the two bearings are generally assembled from both sides of the bearing seat respectively, which will result in poor concentricity of the two bearings, bring additional wear to the bearing seat, affect the service life of the bearings. At the same time, for the rotating shaft of the rotor, the poor concentricity of the two bearings makes the rotating shaft prone to slight deformation. When the rotor is a fan, it will bring relatively large vibration, wear and noise from the outside, resulting in a decrease in the service life of the motor and a poor user experience.

[0059] To solve the above problems, refer to Figure 7 and Figure 8As shown, the bearing seat 20 extends axially and forms a cylindrical installation space inside and forms an installation entrance 22 at one end. The other end of the bearing seat 20 opens a through-hole 24 with a diameter smaller than the installation space to form a limiting portion 23 at the other end of the bearing seat 20; the bearing assembly 30 also includes a stopper 34, the first bearing 31 is installed from the installation entrance 22 into the installation space and limited to the limiting portion 23, the second bearing 32 is installed from the installation entrance 22 into the installation space and is spaced apart from the first bearing 31, the stopper 34 is interference installed in the installation space and abuts against the side of the second bearing 32 away from the first bearing 31; the stator 40 is sleeved on the outside of the bearing seat 20, and the rotating shaft 51 of the rotor 50 passes through the first bearing 31 and the second bearing 32 in sequence.

[0060] Through the above-mentioned arrangement, when installing the bearing assembly 30, the first bearing 31 is first installed into the installation space from the installation entrance 22 and abuts against the limit portion 23, and then the second bearing 32 is installed into the installation space from the installation entrance 22, and then the stopper 34 is installed into the installation space to limit the second bearing 32, and then the rotating shaft 51 of the rotor 50 is inserted between the first bearing 31 and the second bearing 32 in sequence. Since the first bearing 31 and the second bearing 32 are installed in the same direction, for the inner wall of the bearing seat 20, compared with the two-end processing of the prior art, it is easier to ensure the concentricity of the inner wall of the same installation space, and then ensure the concentricity of the first bearing 31 and the second bearing 32 after installation, so as to avoid wear of the bearing seat 20 during the operation of the motor. At the same time, since the concentricity of the first bearing 31 and the second bearing 32 is better, the deformation of the rotating shaft 51 is smaller, and the vibration, wear and noise generated by the rotor 50 are all smaller.

[0061] Alternatively, see Figure 7 and Figure 8 As shown, a retaining spring 54 is clamped at the bottom of the rotating shaft 51 , and the spring 53 abuts between the second bearing 32 and the retaining spring 54 , thereby limiting the rotating shaft 51 in the axial direction.

[0062] Alternatively, as Figure 7 and Figure 8 As shown, the bearing assembly 30 further includes a spacer sleeve 33. One end of the spacer sleeve 33 abuts the side of the first bearing 31 facing away from the limiting portion 23, and the other end of the spacer sleeve 33 abuts the side of the second bearing 32 facing away from the stopper 34. Through this arrangement, the spacer sleeve 33 acts as an unrestricted lateral limit for the first bearing 31 and the second bearing 32. As a result, both sides of the first bearing 31 and both sides of the second bearing 32 are limited. During manufacturing, the spacing between the first bearing 31 and the second bearing 32 is determined by the length of the spacer sleeve 33, resulting in high product consistency.

[0063] Optionally, see also Figure 9, the spacer sleeve 33 includes a support portion 331, a first reinforcing portion 332, and a second reinforcing portion 333. The support portion 331 is annular and extends axially. The two ends of the support portion 331 are respectively abutted against the first bearing 31 and the second bearing 32. The first reinforcing portion 332 is arranged in a plane and is parallel to the cross-section of the support portion 331, preventing the support portion 331 from having insufficient strength in the middle due to its relatively long length. At the same time, at least two second reinforcing portions 333 are provided. The at least two second reinforcing portions 333 are arranged in a divergent manner centered on the axis of the support portion 331 and are connected to the inner wall of the support portion 331, which can also strengthen the overall strength of the spacer sleeve 33. In this embodiment, three second reinforcing portions 333 are provided. In other embodiments, the number of the second reinforcing portions 333 can also be two, four, or more, which is not limited herein.

[0064] It should be noted that a through hole 334 is formed in the middle of the spacer sleeve 33 to avoid the rotating shaft 51.

[0065] In the prior art, the base and the bearing seat are generally made of two materials. The base is made of plastic and the bearing seat is made of metal. After the base is formed, the bearing seat is injection-molded into a rough shape, and then the semi-finished bearing seat is processed to obtain the required shape of the bearing seat. This method results in a relatively high cost of the bearing seat due to the use of metal materials and the secondary processing after injection molding of the metal bearing seat. At the same time, using a metal bearing seat will generate micro-currents in a magnetic field working environment, and it is also easy to corrode after long-term use of the metal bearing seat, shortening the service life of the bearing seat, and two injection molding steps are required, making the operation cumbersome.

[0066] To solve the above problems, the base 11 and the bearing seat 20 are injection-molded in one step. Through the above arrangement, the metal injection molding is omitted, greatly saving the cost input. At the same time, one injection molding step is reduced, improving the production efficiency.

[0067] Optionally, the base 11 and the bearing seat 20 are made of the same material and both are plastic. Plastic has a lower cost and is convenient for injection molding.

[0068] Optionally, refer to Figure 8 and Figure 1, on the inner sidewall of the bearing housing 20, several first protrusions 25 are convexly provided inward. The several first protrusions 25 are arranged at intervals along the inner side of the bearing housing 20. The first protrusions 25 extend along the axial direction of the bearing housing 20. The inner sidewall of the first protrusion 25 is adapted to the circumferential shape of the first bearing 31 and / or the second bearing 32. The first bearing 31 is simultaneously in contact with the inner sidewalls of the several first protrusions 25, and the second bearing 32 is simultaneously in contact with the inner sidewalls of the several first protrusions 25. It can be understood that for the bearing housing 20 formed by plastic injection molding, if it is directly injection molded into a simple cylindrical bearing housing 20, due to the low injection molding accuracy and the inability to perform secondary finishing after demolding, when installing the first bearing 31 and the second bearing 32 at this time, since the outer side of the bearing is completely fitted with the inner wall of the bearing housing 20, the accuracy of the inner wall of the bearing housing 20 has a greater impact on the installation position of the bearing, and the installation accuracy of the two bearings cannot be satisfied. In this embodiment, by providing several first protrusions 25, the contact area between the two bearings and the inner wall of the bearing housing 20 during installation is reduced, thereby reducing the influence of the inner wall of the bearing housing 20 on the bearing installation. Moreover, due to the small volume of the first protrusion 25, it can be realized by small-volume injection molding during the injection molding process, so as to ensure that the side of the first protrusion 25 in contact with the bearing has a high accuracy, so as to achieve the accuracy after processing of metal materials in the prior art.

[0069] Therefore, for the motor provided in this embodiment, since the bearing housing 20 is injection molded from a plastic material, no microcurrent will be generated, and the service life is longer. Combining the setting of several first protrusions 25 can not only save the cost of the material itself (without using metal materials), but also achieve the purpose of saving processing costs (no need for finishing like a metal bearing housing after injection molding), and can achieve the same installation accuracy as the metal bearing housing 20.

[0070] Optionally, eight first protrusions 25 are arranged at intervals along the inner sidewall of the bearing housing 20. In other embodiments, the number of the first protrusions 25 can also be three, four, five, etc., which is not limited herein.

[0071] In order to ensure the stable rotation of the rotor 50, it is usually necessary to perform a dynamic balance test on the rotor 50, that is, to adjust the allowable unbalance amount, and limit the allowable unbalance amount of the rotor 50 within a certain range, which helps to improve the bearing life and motor noise. The conventional method of controlling the allowable unbalance amount is the feeding method, such as adding metal balance blocks, balance mud, UV glue curing, etc. The feeding dynamic balance process is complex, and there is a risk of secondary falling of the additional materials; the feeding port is irregular, which affects the pneumatic noise and the overall performance of the fan. In addition, the dynamic balance auxiliary materials have a certain cost.

[0072] To solve the above problems, as Figure 10As shown, the rotor 50 includes a rotor body 55 and a magnetic member 56. The rotor body 55 is annular, and the magnetic member 56 is fixed to the inner side of the rotor body 55. The magnetic member 56 is used for machining removal of material. That is to say, when adjusting the dynamic balance of the rotor 50 in this embodiment, the method of removing material is adopted. After testing, as Figure 10 shown, a groove 561 is machined at the position corresponding to the unbalanced position, and the dynamic balance of the rotor 50 can be achieved. Compared with the prior art, this method does not require machining holes or grooves on the rotor 50, thereby reducing the noise of the motor. The material removal method is easy to operate. At the same time, the cost of purchasing dynamic balance auxiliary materials is reduced.

[0073] Optionally, the magnetic member 56 and the rotor body 55 are fixed by bonding, and this method is simple and fast.

[0074] This embodiment also provides a fan, including the above-mentioned motor. The circumferential structure of the rotor 50 is a plurality of fan blades 52 arranged at intervals. By adopting the above-mentioned motor, the above-mentioned fan can fix the stator 40 at a lower cost, and at the same time, the fixing reliability of the stator 40 in this way is stronger.

[0075] Obviously, the above-mentioned embodiments of the present invention are merely examples for clearly explaining the present invention, and are not intended to limit the implementation manners of the present invention. For those of ordinary skill in the art, various obvious changes, re-adjustments and substitutions can be made without departing from the protection scope of the present invention. It is not necessary and impossible to enumerate all the implementation manners here. Any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the claims of the present invention.

Claims

1. Motor, characterized in that, include: A base (11) and a bearing seat (20), wherein the bearing seat (20) is connected to the base (11) and extends in the axial direction; A stator (40) and a rotor (50), wherein the stator (40) comprises a stator body (41) and a plurality of first protrusions (421), wherein the stator body (41) is annular; the plurality of first protrusions (421) are spaced apart along the inner circumference of the stator body (41); the bearing seat (20) is inserted between the plurality of first protrusions (421); the outer circumference of the bearing seat (20) and the free end of each first protrusion (421) are interference fit; the first protrusion (421) is bent and deformed after being inserted into the bearing seat (20) to achieve interference fit with the bearing seat (20); and the rotor (50) is rotatably connected to the bearing seat (20) via a bearing assembly (30).

2. The motor according to claim 1, characterized in that, A plurality of the first protrusions (421) are formed by an annular deformable member (42), and the annular deformable member (42) and the stator body (41) are integrally formed by injection molding.

3. The motor according to claim 2, characterized in that, The material of the annular deformation member (42) is metal.

4. The motor according to claim 1, characterized in that An accommodating groove (26) is provided on the outer periphery of the bearing seat (20) corresponding to each first protrusion (421), and at least a portion of the first protrusion (421) is accommodated in the corresponding accommodating groove (26).

5. The motor according to claim 4, wherein, An abutment portion (27) is formed between two adjacent accommodating grooves (26), and a plurality of second protrusions (411) are protruded from the inner ring of the stator body (41). The second protrusions (411) are arranged at intervals along the inner circumference of the stator body (41), and each second protrusion (411) elastically abuts against one of the abutment portions (27).

6. The motor according to claim 1, characterized in that, A plurality of second protrusions (28) are also provided on the peripheral side of the bearing seat (20), and the plurality of second protrusions (28) abut against the inner side wall of the stator body (41).

7. The motor according to any one of claims 1-6, characterized in that, A cylindrical installation space is formed inside the bearing seat (20) and an installation entrance (22) is formed at one end. A through opening (24) having a diameter smaller than that of the installation space is provided at the other end of the bearing seat (20), so as to form a limiting portion (23) at the other end of the bearing seat (20); The bearing assembly (30) comprises a first bearing (31), a second bearing (32) and a stopper (34); the first bearing (31) is installed from the installation entrance (22) into the installation space and is limited to the limiting portion (23); the second bearing (32) is installed from the installation entrance (22) into the installation space and is spaced apart from the first bearing (31); the stopper (34) is interference-fitted into the installation space and abuts against a side of the second bearing (32) facing away from the first bearing (31); The rotating shaft (51) of the rotor (50) passes through the first bearing (31) and the second bearing (32) in sequence.

8. The motor according to claim 7, characterized in that, The base (11) and the bearing seat (20) are injection molded in one step.

9. The motor according to claim 8, characterized in that The base (11) and the bearing seat (20) are made of the same material, both plastic.

10. The motor according to claim 9, characterized in that, The inner side wall of the bearing seat (20) is provided with a plurality of first protrusions (25) protruding inwardly, and the plurality of first protrusions (25) are arranged at intervals along the inner side of the bearing seat (20). The first protrusions (25) extend along the axial direction of the bearing seat (20). The inner side wall of the first protrusion (25) is adapted to the circumferential shape of the first bearing (31) and / or the second bearing (32). The first bearing (31) is simultaneously in contact with the inner side walls of the plurality of first protrusions (25), and the second bearing (32) is simultaneously in contact with the inner side walls of the plurality of first protrusions (25).

11. The motor according to claim 7, characterized in that The bearing assembly (30) further includes a spacer sleeve (33), one end of the spacer sleeve (33) abuts against a side of the first bearing (31) facing away from the limiting portion (23), and the other end of the spacer sleeve (33) abuts against a side of the second bearing (32) facing away from the stopper (34).

12. The motor according to any one of claims 1-6, characterized in that, The rotor (50) comprises a rotor body (55) and a magnetic member (56), the rotor body (55) is annular, the magnetic member (56) is fixed to the inner side of the rotor body (55), and the magnetic member (56) is used for machining and removing weight.

13. Fan, characterized in that, The motor comprises the motor according to any one of claims 1 to 12, wherein the circumferential structure of the rotor (50) is a plurality of blades (52) arranged at intervals.

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