Motor structure

Abstract

The utility model discloses a motor structure. The motor structure comprises a stator; one end of the rotor is movably connected with the stator, the middle position and the stator are arranged at intervals, and the other end penetrates out of the stator; the middle plate assembly penetrates through the other end of the rotor and is in contact with the rotor, and the middle plate assembly is connected with the stator; the motor also comprises a cover plate which sleeves the other end of the rotor, is in contact with the stator, and presses the middle plate assembly. The first bearing is connected to the cover plate, penetrates out of the other end of the rotor and is connected with the rotor; the pressing plate is connected with the stator and presses the cover plate; the first riveting part is arranged on the stator and is used for riveting the cover plate and the stator; the second riveting part is arranged on the stator and is used for riveting the pressing plate and the stator; therefore, the technical problems that when the end cover assembly and the stator are connected, the non-concentric condition occurs, the coaxiality is poor, the rotor cannot rotate smoothly, and normal work of the motor is affected are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of permanent magnet DC motors, in particular to a motor structure. Background Art

[0002] A permanent magnet DC motor is a DC motor that uses permanent magnets to create a magnetic field;

[0003] Permanent magnet DC motors are widely used in various portable electronic devices or appliances, such as recorders, VCD players, record players, electric massagers and various toys. They are also widely used in automobiles, motorcycles, electric bicycles, battery vehicles, ships, aviation, machinery and other industries. They are also widely used in some high-tech products, such as video recorders, copiers, cameras, mobile phones, precision machine tools, etc.

[0004] The structure of a permanent magnet DC motor generally includes: a stator; a rotor, one end of which is connected to the stator and the other end of which passes through the stator; a middle plate assembly, which is sleeved on the other end of the rotor and contacts the stator; and an end cover assembly, which passes through the other end of the rotor and is connected to the rotor, and the end cover assembly is connected to the stator to press the middle plate assembly;

[0005] The end cover assembly includes: an end cover connected to the stator and pressing the middle plate assembly; and a bearing connected to the end cover and connected to the other end of the rotor;

[0006] Since the end cover and the stator on the end cover assembly need to be connected by riveting, eccentricity between the end cover and the stator will occur during riveting, causing the bearing to be eccentric, the bearing to be non-concentric with the rotor, the coaxiality is poor, and the rotor rotates unsmoothly. In severe cases, the temperature rise will increase, the speed will slow down, noise will be generated, and the power and efficiency of the motor will be reduced. In addition, when the permanent magnet DC motor is connected to the mounting part by screws inserted through the mounting holes on the end cover, the force applied between multiple screws is uneven due to the rotation and torsion of the screws, and the force offset of the end cover will occur, causing the bearing to be eccentric, the bearing to be non-concentric with the rotor, and the coaxiality is poor, which affects the normal operation of the motor and reduces the service life and performance of the motor. Utility Model Content

[0007] In view of the above-mentioned deficiencies existing in the related art, an object is to provide a motor structure to solve the technical problem that when the end cover assembly and the stator are connected, there will be eccentricity and poor coaxiality, which leads to uneven rotation of the rotor and affects the normal operation of the motor.

[0008] The technical solution to achieve the purpose is: a motor structure, comprising: a stator; a rotor, one end of which is movably connected to the stator, the middle position of which is spaced apart from the stator, and the other end of which passes through the stator; and a middle plate assembly, which passes through the other end of the rotor and contacts the rotor, and the middle plate assembly is connected to the stator;

[0009] It also includes: a cover plate, which is sleeved on the other end of the rotor and is in contact with the stator for positioning, and the cover plate presses the middle plate assembly;

[0010] A first bearing, connected to the cover plate, penetrated by the other end of the rotor, and connected to the rotor;

[0011] A pressing plate connected to the stator to press the cover plate;

[0012] A first riveting part, provided on the stator, for riveting the cover plate and the stator to form a primary riveting;

[0013] And a second riveting portion is arranged on the stator and is used to rivet the pressing plate and the stator to form a secondary riveting.

[0014] Further: the cover plate comprises: a middle part, the middle part has a through hole, the through hole is penetrated by the other end of the rotor and connected to the first bearing; and an edge part, connected to the middle part, surrounding the middle part, pressing the middle plate assembly, arranged in the stator, and contacting the inner wall of the stator;

[0015] The thickness of the middle part is greater than the thickness of the edge part;

[0016] The portion of the edge portion that contacts the inner wall of the stator is an arc-shaped edge;

[0017] The edge portion is provided with four notches, and the notches are used to engage with the middle plate assembly.

[0018] Further: the pressing plate comprises: a plate body; and two bent protrusions symmetrically connected to the plate body;

[0019] The plate body has a first through hole, and the first through hole is used to penetrate a part of the cover plate and the other end of the rotor, and to be positioned with the cover plate;

[0020] The plate body is provided with two second through holes, the second through holes are connected to the plate body at intervals and are arranged at intervals with the bending protrusion;

[0021] The plate body is provided with two through grooves, which are connected to the plate body at intervals and are arranged at intervals with the bending protrusion and the first through hole.

[0022] Further: the center lines of the first through hole and the second through hole are on the same straight line, and the second through holes are symmetrically arranged on both sides of the first through hole;

[0023] The bent protrusions are symmetrically arranged on both sides of the first through hole;

[0024] An angle C is formed between a first connecting line A between the bending protrusion and the first through hole and a second connecting line B between the second through hole and the first through hole;

[0025] The through groove is arranged between the bending protrusion and the first through hole, and is arranged on the first connecting line A.

[0026] Furthermore: the first riveted portion includes: a plurality of first rivet point protrusions, two of which form a group, forming at least two groups of the first rivet point protrusions, and the groups are evenly distributed on the stator.

[0027] Furthermore: the two first rivet point protrusions in each group of the first rivet point protrusions are symmetrically arranged on both sides of the second riveted portion.

[0028] Further: the second riveted part includes: a plurality of second rivet point protrusions, evenly distributed on the stator; and a plurality of rivet penetration grooves, evenly distributed on the pressure plate, for one-to-one correspondence with the second rivet point protrusions, the rivet penetration grooves are penetrated by the second rivet point protrusions, and the second rivet point protrusions are bent by riveting to press the pressure plate.

[0029] Further: the second rivet point protrusion includes: a first protrusion connected to the stator; two second protrusions symmetrically spaced and connected to the first protrusion;

[0030] When the second rivet point protrusion is inserted into the rivet penetration groove, the first protrusion is stuck in the rivet penetration groove, and the second protrusion penetrates the rivet penetration groove. After the second protrusion is bent by riveting, it presses the pressing plate.

[0031] Further: the stator includes: a casing having the first riveted portion and the second riveted portion on one end portion, the casing having an inner space, the inner space accommodating a portion of the rotor, a portion of the cover plate and the middle plate assembly; a second bearing connected to the other end portion of the casing, arranged in the inner space, and used to connect one end of the rotor; and a plurality of permanent magnets arranged in the inner space, surrounding the rotor, and spaced apart from the rotor.

[0032] Further: the rotor includes: a main shaft connected to the first bearing and the second bearing; an iron core connected to the main shaft, arranged in the inner space, and spaced apart from the permanent magnet; and a commutator connected to the main shaft and in contact with the middle plate assembly.

[0033] Further: the middle plate assembly includes: a middle plate frame, connected to the casing and arranged in the inner space, the middle plate frame having four third protrusions, the third protrusions engaging with the cover plate; a carbon brush, connected to the middle plate frame and in contact with the commutator; two inductors, connected to the middle plate frame; an elastic arm, connected to the middle plate frame; and two inserts, passed through the middle plate frame, one-to-one passing through the third protrusions, and passing through the pressure plate.

[0034] The above technical solution has the following beneficial effects: a motor structure, compared with the related art, is provided with a stator, a rotor, a middle plate assembly, a cover plate, a first bearing, a pressure plate, a first riveted portion and a second riveted portion; one end of the rotor is movably connected to the stator; the middle plate assembly is passed through the other end of the rotor, contacts the rotor, and is connected to the stator; the cover plate presses the middle plate assembly; the first bearing is connected to the cover plate and connected to the rotor; the pressure plate is connected to the stator and presses the cover plate; the first bearing is connected to the cover plate, the first bearing is connected to the rotor, the cover plate and the stator are riveted once through the first riveted portion, and a riveted joint is formed between the cover plate and the stator. The relative integrity ensures the coaxiality between the cover plate and the stator, and when the pressure plate forms a secondary riveting with the stator through the second riveting part, the coaxiality between the cover plate and the stator will not be affected, thereby achieving relatively good coaxiality, relatively smooth rotor rotation, and normal operation of the motor; thereby overcoming the technical problem that when the end cover assembly is connected to the stator, there will be eccentricity, poor coaxiality, and uneven rotor rotation, which affects the normal operation of the motor. The technical effect of no eccentricity, relatively good coaxiality, relatively smooth rotor rotation, and normal operation of the motor is achieved, which is practical. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 This is the exploded view of the general assembly;

[0036] Figure 2 for Figure 1 Schematic diagram of the combined structure;

[0037] Figure 3 for Figure 2 Schematic diagram of the structure with the pressure plate removed;

[0038] Figure 4 for Figure 3 A local enlarged schematic diagram in FIG.

[0039] Figure 5 for Figure 3 A partial cross-sectional view of

[0040] Figure 6 It is a structural schematic diagram of the middle plate assembly, the cover plate and the first bearing;

[0041] Figure 7 It is a structural schematic diagram of the pressing plate;

[0042] Figure 8 is a schematic diagram of the structure of the rotor;

[0043] Fig. 9 is a schematic diagram of the structure of the middle plate assembly;

[0044] Fig.10 It is a structural schematic diagram of a motor in the prior art;

[0045] In the figure: 10. stator, 11. housing, 11-1. inner space, 12. second bearing, 13. permanent magnet, 20. rotor, 21. main shaft, 22. iron core, 23. commutator, 30. middle plate assembly, 31. middle plate frame, 31-1. third protrusion, 32. carbon brush, 33. inductor, 34. elastic arm, 35. insert, 40. cover plate, 41. middle part, 41-1. through hole, 42. edge part, 42-1. circle Arc edge, 42-2. Notch, 50. First bearing, 60. Pressure plate, 61. Plate body, 61-1. First through hole, 61-2. Second through hole, 61-3. Through groove, 62. Bending protrusion, 70. First riveted portion, 71. First rivet point protrusion, 80. Second riveted portion, 81. Second rivet point protrusion, 81-1. First protrusion, 81-2. Second protrusion, 82. Riveted through groove, 100. End cover, 200. Bearing. DETAILED DESCRIPTION

[0046] In order to make the content easier to understand, the following is a further detailed description based on specific embodiments and in conjunction with the accompanying drawings;

[0047] A motor structure solves the technical problem that when the end cover assembly and the stator are connected, there will be a misalignment, poor coaxiality, resulting in uneven rotation of the rotor, which affects the normal operation of the motor. The structure can be manufactured and used, and achieves the positive effects of no misalignment, relatively good coaxiality, relatively smooth rotation of the rotor, and normal operation of the motor. The overall idea is as follows:

[0048] One implementation method:

[0049] like Figure 1 , Figure 2 , Figure 8 , Fig. 9 , Fig.10As shown; a motor structure, comprising: a stator 10; a rotor 20, one end of which is movably connected to the stator 10, the middle position is spaced apart from the stator 10, and the other end passes through the stator 10; and a middle plate assembly 30, which passes through the other end of the rotor 20, contacts the rotor 20, and the middle plate assembly 30 is connected to the stator 10; and also includes:

[0050] A cover plate 40 is sleeved on the other end of the rotor 20 and is in contact with the stator 10 for positioning. The cover plate 40 presses the middle plate assembly 30;

[0051] A first bearing 50 is connected to the cover plate 40 and is passed through the other end of the rotor 20 to be connected to the rotor 20;

[0052] A pressing plate 60 connected to the stator 10 to press the cover plate 40;

[0053] A first riveting portion 70 is provided on the stator 10 and is used to rivet the cover plate 40 and the stator 10 to form a primary riveting connection;

[0054] and a second riveting portion 80, disposed on the stator 10, for riveting the pressing plate 60 and the stator 10 to form a secondary riveting;

[0055] Specifically, during implementation, a stator 10, a rotor 20, a middle plate assembly 30, a cover plate 40, a first bearing 50, a pressure plate 60, a first riveted portion 70 and a second riveted portion 80 are provided; one end of the rotor 20 is movably connected to the stator 10; the middle plate assembly 30 is passed through the other end of the rotor 20, contacts the rotor 20, and is connected to the stator 10; the cover plate 40 presses the middle plate assembly 30; the first bearing 50 is connected to the cover plate 40, connected to the rotor 20; the pressure plate 60 is connected to the stator 10, pressing the cover plate 40; the first bearing 50 is connected to the cover plate 40, the first bearing 50 is connected to the rotor 20, and the cover plate 40 is connected to the stator The cover plate 40 and the stator 10 are riveted once by the first riveting part 70, and the cover plate 40 and the stator 10 form a relative whole, which ensures the coaxiality between the cover plate 40 and the stator 10, so that the coaxiality between the first bearing 50 and the stator 10 is relatively good, thereby making the coaxiality between the rotor 20 and the second bearing 12 and the first bearing 50 relatively good, and when the pressing plate 60 is riveted twice by the second riveting part 80 and the stator 10, the coaxiality between the cover plate 40 and the stator 10 is not affected, so that the coaxiality is relatively good, the rotor 20 rotates relatively smoothly, and the motor can work normally;

[0056] Another embodiment:

[0057] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 As shown; in implementation, the cover plate 40 includes: a middle portion 41, the middle portion 41 has a through hole 41-1, the through hole 41-1 is penetrated by the other end of the rotor 20, and is connected to the first bearing 50; and an edge portion 42, connected to the middle portion 41, surrounding the middle portion 41, pressing the middle plate assembly 30, and disposed in the stator 10, and in contact with the inner wall of the stator 10;

[0058] The middle part 41 and the edge part 42 are integrally formed. The thickness of the middle part 41 is greater than the thickness of the edge part 42. The size is controlled, the appearance is relatively beautiful, and it is conducive to the middle part 41 passing through the first through hole 61-1 on the pressing plate 60 and plugging and positioning with the first through hole 61-1;

[0059] The contact part of the edge portion 42 with the inner wall of the stator 10 is an arc-shaped edge 42-1, which is conducive to close contact with the inner wall of the stator 10, not only with relatively high positioning accuracy, but also with relatively good riveting effect during one riveting, and at the same time, the coaxiality between the cover plate 40 and the stator 10 is ensured;

[0060] The edge portion 42 has four notches 42-2, and the notches 42-2 are used to engage with the middle plate assembly 30. The notches 42-2 are one-to-one engaged with the third protrusions 31-1 on the middle plate assembly 30 for positioning. The positioning accuracy is relatively high, which is not only conducive to the cover plate 40 pressing the middle plate assembly 30, but also the cover plate 40 will not move during the one-time riveting, which is conducive to ensuring the coaxiality between the cover plate 40 and the stator 10.

[0061] Another embodiment:

[0062] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 As shown; during implementation, the first bearing 50 is a common structure in the prior art, such as a deep groove ball bearing, which is conducive to connecting and supporting the rotor 20, so that the rotor 20 rotates relatively smoothly;

[0063] Another embodiment:

[0064] like Figure 1 , Figure 2 , Figure 7 As shown; during implementation, the pressing plate 60 includes: a plate body 61; and two bent protrusions 62, symmetrically connected to the plate body 61;

[0065] The plate body 61 has a first through hole 61-1, which is used to penetrate a part of the middle part 41 and the other end of the rotor 20 and to be positioned with the middle part 41. The first through hole 61-1 is provided to facilitate insertion and positioning with the middle part 41, and the positioning accuracy is relatively high.

[0066] The plate body 61 has two second through holes 61-2, which are connected to the plate body 61 at intervals and are arranged at intervals with the bending protrusion 62; the center lines of the first through hole 61-1 and the second through hole 61-2 are on the same straight line, and the second through holes 61-2 are symmetrically arranged on both sides of the first through hole 61-1; the first connecting line A between the bending protrusion 62 and the first through hole 61-1 and the second connecting line B between the second through hole 61-2 and the first through hole 61-1 are connected to each other. An angle C is formed; the angle C is 25°-30°; the second through hole 61-2 is a mounting hole, and the position of the second through hole 61-2 and the angle C are set so that the second through hole 61-2 avoids the first through hole 61-1 and the bending protrusion 62, and is spaced from the first through hole 61-1 and the bending protrusion 62, which is conducive to inserting a screw through the second through hole 61-2 to connect with the installation part without colliding with the stator 10 and the middle plate assembly 30, and the plate body 61 will not be offset by force, and there will be no eccentricity, and the coaxiality is relatively good;

[0067] The plate body 61 has two through slots 61-3, which are connected to the plate body 61 at intervals and are arranged at intervals with the bending protrusion 62 and the first through hole 61-1; the through slot 61-3 is arranged between the bending protrusion 62 and the first through hole 61-1, and is arranged on the first connecting line A; the through slot 61-3 is arranged to facilitate the insertion of the insert 35;

[0068] The bending protrusions 62 are symmetrically arranged on both sides of the first through hole 61-1; the outer shape of the bending protrusions 62 is roughly an "L"-shaped structure; the bending protrusions 62 are provided, and when the screws are inserted into the second through hole 61-2 on the plate body 61 to connect with the part to be installed, the bending protrusions 62 can contact with the part to be installed to form a positioning, which is conducive to aligning the screws with the threaded holes of the part to be installed, making the installation more convenient. At the same time, the contact area with the part to be installed is increased, and the reliability of the connection is better. When the plate body 61 is subjected to force, the bending protrusions 62 form a support due to the contact between the bending protrusions 62 and the part to be installed, thereby reducing the probability of damaging the plate body 61;

[0069] Another embodiment:

[0070] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 7As shown; during implementation, the first riveting portion 70 includes: eight first riveting point protrusions 71, two in a group, forming four groups of the first riveting point protrusions 71, and the groups are evenly distributed on the stator 10;

[0071] The first riveting point protrusion 71 forms a single riveting connection, so that the cover plate 40 and the stator 10 form a relative whole, and the structural strength is relatively good. The coaxiality between the cover plate 40 and the stator 10 is also ensured, so that the coaxiality between the first bearing 50 and the stator 10 is relatively good, thereby making the coaxiality between the rotor 20 and the second bearing 12 and the first bearing 50 relatively good;

[0072] The two first rivet point protrusions 71 of each group of the first rivet point protrusions 71 are symmetrically arranged on both sides of the second riveted portion 80;

[0073] The two first riveting point protrusions 71 are symmetrically arranged on both sides of a second riveting point protrusion 81; the position setting makes the position of the first riveting close to the position of the second riveting, reducing the probability of displacement and deformation between the cover plate 40 and the stator 10;

[0074] The second riveting portion 80 includes: four second riveting point protrusions 81, which are evenly distributed on the stator 10; and four riveting through grooves 82, which surround the first through hole 61-1 and are evenly distributed on the plate body 61, and are used to correspond to the second riveting point protrusions 81 one by one. The second riveting point protrusions 81 penetrate the riveting through grooves 82, and the second riveting point protrusions 81 are riveted and bent to press the plate body 61;

[0075] The second rivet point protrusion 81 includes: a first protrusion 81-1, connected to the stator 10; two second protrusions 81-2, symmetrically spaced and connected to the first protrusion 81-1; when the second rivet point protrusion 81 is plugged into the rivet through-groove 82, the first protrusion 81-1 is stuck in the rivet through-groove 82, and the second protrusion 81-2 passes through the rivet through-groove 82, and the second protrusion 81-2 is riveted and bent to press the plate body 61; since the first rivet point protrusion 71 forms a primary riveting, the cover plate 40 and the stator 10 form a relative whole, when the plate body 61 and the stator 10 form a secondary riveting through the second rivet point protrusion 81 and the rivet through-groove 82, the cover plate 40 and the stator 10 will not be displaced or deformed, thereby ensuring the coaxiality between the rotor 20 and the second bearing 12 and the first bearing 50;

[0076] Regarding the structures of the stator 10, the rotor 20, the middle plate assembly 30, the end cover 100, and the bearing 200:

[0077] See Fig.10The structure of the permanent magnet DC motor in the prior art generally includes: a stator 10; a rotor 20; a middle plate assembly 30; and an end cover assembly; the end cover assembly further includes: an end cover 100 and a bearing 200;

[0078] The stator 10 comprises: a housing 11, having the first riveted portion 70 and the second riveted portion 80 at one end thereof, the housing 11 having an inner space 11-1 therein, the inner space 11-1 accommodating a part of the rotor 20, a part of the cover plate 40 and the middle plate assembly 30; a second bearing 12 connected to the other end of the housing 11, disposed in the inner space 11-1, and used for connecting one end of the rotor 20; and a plurality of permanent magnets 13 disposed in the inner space 11-1, surrounding the rotor 20 and spaced apart from the rotor 20;

[0079] The rotor 20 includes: a main shaft 21 connected to the first bearing 50 and the second bearing 12; an iron core 22 connected to the main shaft 21, disposed in the inner space 11-1, and spaced apart from the permanent magnet 13; and a commutator 23 connected to the main shaft 21, in contact with the middle plate assembly 30;

[0080] The middle plate assembly 30 includes: a middle plate frame 31, connected to the housing 11, and arranged in the inner space 11-1, the middle plate frame 31 has four third protrusions 31-1, and the third protrusions 31-1 are engaged with the notches 42-2 in a one-to-one manner; a carbon brush 32, connected to the middle plate frame 31, and in contact with the commutator 23; two inductors 33, connected to the middle plate frame 31; an elastic arm 34, connected to the middle plate frame 31; and two inserts 35, which are inserted into the middle plate frame 31, penetrate the third protrusions 31-1 in a one-to-one manner, and penetrate the through slots 61-3 in a one-to-one manner;

[0081] The stator 10, the rotor 20 and the middle plate assembly 30 are common structures in the prior art and are common knowledge. They are not the inventive point of the present invention. They are only for better describing the present invention and facilitating understanding of the technical solution of the present invention. After reading the disclosed content, ordinary technicians in this field can directly and unambiguously know how to set them without creative labor or excessive experiments.

[0082] The working principle is as follows: the first bearing 50 is connected to the cover plate 40, the first bearing 50 is connected to the rotor 20, the cover plate 40 and the stator 10 are riveted once through the first riveting part 70, and the cover plate 40 and the stator 10 form a relative whole, which ensures the coaxiality between the cover plate 40 and the stator 10, so that the coaxiality between the first bearing 50 and the stator 10 is relatively good, thereby making the coaxiality between the rotor 20 and the second bearing 12 and the first bearing 50 relatively good, and when the pressure plate 60 forms a secondary riveting with the stator 10 through the second riveting part 80, since the cover plate 40 and the stator 10 are a relative whole, the secondary riveting will not affect the coaxiality between the cover plate 40 and the stator 10, so that the coaxiality is relatively good, the rotor 20 rotates relatively smoothly, and the motor can work normally;

[0083] By changing the end cover 100 into a combination of a cover plate 40 and a pressure plate 60, the through hole 41-1 (bearing mounting hole) on the cover plate 40 and the second through hole 61-2 (mounting hole connected to the mounting part) on the pressure plate 60 are not on the same part. When the cover plate 40 and the stator 10 are riveted once by the first riveting part 70, the position of the cover plate 40 is fixed, and the position between the first bearing 50 and the rotor 20 is also fixed. When the pressure plate 60 and the stator 10 are riveted twice by the second riveting part 80, since the position of the cover plate 40 is fixed, the cover plate 40 will not be affected, the cover plate 40 will not be offset, and the first bearing 50 and the rotor 20 will not be offset. Moreover, after the second riveting, when the screws are inserted into the second through hole 61-2 to connect with the mounting part, the cover plate 40 will not be offset, so that the coaxiality between the rotor 20 and the second bearing 12 and the first bearing 50 is relatively good, which can reduce vibration, noise and wear, and improve the life and performance of the motor.

[0084] In the description, it should be understood that the terms "upper", "lower", "left", "right", "front", "back" and the like indicating directions or positional relationships are based on the positional relationships described in the drawings and are only for the convenience of description or simplified description, rather than indicating specific directions that must be possessed; the operation process described in the embodiments is not an absolute usage procedure and corresponding adjustments may be made in actual use;

[0085] Unless otherwise defined, the technical or scientific terms used herein shall have the usual meanings understood by persons with ordinary skills in the relevant field; the words "first", "second" and similar words used in the specification and claims do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, words such as "one" or "a" do not necessarily indicate a quantity limitation, but indicate the existence of at least one, which needs to be determined according to the content of the embodiment;

[0086] The above is only a preferred specific implementation method, but the protection scope is not limited to it. Any technician familiar with this technical field can make equivalent substitutions or changes based on the technical solutions and inventive concepts within the disclosed technical scope, which should be covered by the protection scope.

Claims

1. A motor structure, comprising: A stator (10); a rotor (20), one end of which is movably connected to the stator (10), the middle position of which is spaced apart from the stator (10), and the other end of which passes through the stator (10); and a middle plate assembly (30), which passes through the other end of the rotor (20) and contacts the rotor (20), and the middle plate assembly (30) is connected to the stator (10); characterized in that it also includes: A cover plate (40) is sleeved on the other end of the rotor (20) and is in contact with the stator (10) for positioning; the cover plate (40) presses the middle plate assembly (30); A first bearing (50) connected to the cover plate (40), passing through the other end of the rotor (20) and connected to the rotor (20); A pressing plate (60) connected to the stator (10) and pressing the cover plate (40); A first riveting portion (70) is provided on the stator (10) and is used to rivet the cover plate (40) and the stator (10) to form a single riveting connection; and a second riveting portion (80) disposed on the stator (10) and used for riveting the pressing plate (60) and the stator (10) to form secondary riveting.

2. A motor structure according to claim 1, characterized in that: The cover plate (40) comprises: a middle portion (41), the middle portion (41) having a through hole (41-1), the through hole (41-1) being penetrated by the other end of the rotor (20) and connected to the first bearing (50); and an edge portion (42), connected to the middle portion (41), surrounding the middle portion (41), pressing the middle plate assembly (30), being arranged in the stator (10), and contacting the inner wall of the stator (10); The thickness of the middle portion (41) is greater than the thickness of the edge portion (42); The portion of the edge portion (42) that contacts the inner wall of the stator (10) is an arc-shaped edge (42-1); The edge portion (42) is provided with four notches (42-2), and the notches (42-2) are used to engage with the middle plate assembly (30).

3. A motor structure according to claim 1, characterized in that: The pressing plate (60) comprises: a plate body (61); and two bent protrusions (62) symmetrically connected to the plate body (61); The plate body (61) has a first through hole (61-1), the first through hole (61-1) being used to penetrate a part of the cover plate (40) and the other end of the rotor (20) to be positioned with the cover plate (40); The plate body (61) has two second through holes (61-2), the second through holes (61-2) are connected to the plate body (61) at intervals, and are arranged at intervals from the bending protrusion (62); The plate body (61) has two through grooves (61-3) which are spaced apart and connected to the plate body (61) and spaced apart from the bending protrusion (62) and the first through hole (61-1).

4. A motor structure according to claim 3, characterized in that: The center lines of the first through hole (61-1) and the second through hole (61-2) are on the same straight line, and the second through hole (61-2) is symmetrically arranged on both sides of the first through hole (61-1); The bent protrusions (62) are symmetrically arranged on both sides of the first through hole (61-1); A first connecting line A between the bent protrusion (62) and the first through hole (61-1) and a second connecting line B between the second through hole (61-2) and the first through hole (61-1) form an angle C; The through groove (61-3) is arranged between the bending protrusion (62) and the first through hole (61-1), and is arranged on the first connecting line A.

5. The motor structure according to claim 1, characterized in that: The first riveting portion (70) comprises: a plurality of first riveting point protrusions (71), two of which form a group, forming at least two groups of the first riveting point protrusions (71), and the groups are evenly distributed on the stator (10).

6. A motor structure according to claim 5, characterized in that: The two first rivet point protrusions (71) on each group of the first rivet point protrusions (71) are symmetrically arranged on both sides of the second riveted portion (80).

7. The motor structure according to claim 1, characterized in that: The second riveting portion (80) comprises: a plurality of second riveting point protrusions (81) evenly distributed on the stator (10); and a plurality of riveting penetration grooves (82) evenly distributed on the pressing plate (60) for corresponding one-to-one with the second riveting point protrusions (81), the riveting penetration grooves (82) being penetrated by the second riveting point protrusions (81), and the second riveting point protrusions (81) being bent by riveting to press the pressing plate (60).

8. A motor structure according to claim 7, characterized in that: The second rivet point protrusion (81) comprises: a first protrusion (81-1) connected to the stator (10); and two second protrusions (81-2) symmetrically spaced and connected to the first protrusion (81-1); When the second rivet point protrusion (81) is plugged into the rivet penetration groove (82), the first protrusion (81-1) is stuck in the rivet penetration groove (82), the second protrusion (81-2) penetrates the rivet penetration groove (82), and the second protrusion (81-2) is bent by riveting to press the pressing plate (60).

9. A motor structure according to claim 1 or 2 or 4 or 6 or 8, characterized in that: The stator (10) comprises: a casing (11), one end of which is provided with the first riveted portion (70) and the second riveted portion (80); the casing (11) has an inner space (11-1), the inner space (11-1) accommodating a part of the rotor (20), a part of the cover plate (40) and the middle plate assembly (30); a second bearing (12) connected to the other end of the casing (11), arranged in the inner space (11-1) and used for connecting to one end of the rotor (20); and a plurality of permanent magnets (13) arranged in the inner space (11-1), surrounding the rotor (20) and spaced apart from the rotor (20).

10. A motor structure according to claim 9, characterized in that: The rotor (20) comprises: a main shaft (21) connected to the first bearing (50) and the second bearing (12); an iron core (22) connected to the main shaft (21), arranged in the inner space (11-1) and spaced apart from the permanent magnet (13); and a commutator (23) connected to the main shaft (21) and in contact with the middle plate assembly (30).

11. A motor structure according to claim 10, characterized in that: The middle plate assembly (30) comprises: a middle plate frame (31) connected to the housing (11) and arranged in the inner space (11-1), the middle plate frame (31) having four third protrusions (31-1), the third protrusions (31-1) being engaged with the cover plate (40); a carbon brush (32) connected to the middle plate frame (31) and in contact with the commutator (23); two inductors (33) connected to the middle plate frame (31); an elastic arm (34) connected to the middle plate frame (31); and two inserts (35) inserted into the middle plate frame (31), passing through the third protrusions (31-1) one by one, and passing through the pressure plate (60).

Images