Motor capable of improving self-locking force

Abstract

The utility model discloses a motor capable of improving self-locking force, belongs to the field of actuators, and solves the problems that an existing motor is poor in self-locking capacity and unstable in operation, and the technical scheme for solving the problems includes that a shell is provided with a first magnet assembly; the rotor or the rotating shaft is provided with a second magnet assembly spaced from the first magnet assembly, each of the first magnet assembly and the second magnet assembly comprises a plurality of magnets, the magnets are arranged in the circumferential direction of the rotating shaft and arranged on the rotating shaft in a sleeving mode, and the magnetic poles of every two adjacent magnets in the magnets are arranged in a staggered mode. The angle formed by every two adjacent magnets in the circumferential direction of the rotating shaft is consistent with the minimum rotating angle of the rotor, the second magnet assembly can rotate relative to the first magnet assembly, and the first magnet assembly and the second magnet assembly attract each other magnetically so as to apply self-locking force to the rotor in a static state. According to the utility model, the motor has good self-locking capability, and the operation of the motor is more stable.

Description

Technical Field

[0001] The utility model relates to the field of actuators, in particular to a motor for improving self-locking force. Background Art

[0002] The self-locking force of a motor refers to the force that acts on the entire device when the motor is powered off, due to the tooth torque generated by the cooperation between the internal iron core shape and the magnet, which is amplified by the worm gear and worm. For example, when the lifting table is unplugged after reaching its highest height, you can add a 100kg weight on the table without it sliding down. However, if you add more weight, the table top slides down. At this time, the self-locking force that the motor can provide is more than 1000.

[0003] In order to improve the self-locking force of the motor, the prior art, such as utility model patent CN211958917U, discloses that a plurality of outer magnet blocks are provided in the rear end cover, and a plurality of inner magnet blocks are provided in the circumferential side wall of the reluctance rotor, which are suitable for magnetic attraction with the plurality of outer magnet blocks, and the magnetic poles of the side ends of the plurality of inner magnet blocks facing the center direction of the reluctance rotor are the same. The minimum angle of the rotor rotation in the motor is the result of the interaction between the internal iron core and the stator, and is usually a fixed value. The magnetic poles of the added magnets in the above device are the same, resulting in the magnetic force distribution angle of the added magnets being inconsistent with the angle of the rotor rotation. The magnetic force angle of the rotor being received by the added magnets is inconsistent with the angle of the rotor rotation, which causes the motor to be unstable during operation, and may cause vibration and noise. Utility Model Content

[0004] The purpose of the utility model is to provide a motor with improved self-locking force, which solves the problem that the existing motor has poor self-locking ability and causes unstable motor operation, so that the motor has better self-locking ability and runs more smoothly.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a motor with enhanced self-locking force, comprising a shell, a rotating shaft, a stator and a rotor, the rotor being fixed on the rotating shaft, the stator being sleeved on the rotor, the rotor being able to rotate relative to the stator to rotate the rotating shaft, the shell being provided with a first magnet assembly, the rotor or the rotating shaft being provided with a second magnet assembly spaced from the first magnet assembly, the first magnet assembly and the second magnet assembly both comprising a plurality of magnets, the plurality of magnets being arranged along the circumferential direction of the rotating shaft and sleeved on the rotating shaft, the magnetic poles of two adjacent magnets among the plurality of magnets being staggered, the angle formed by the two adjacent magnets in the circumferential direction of the rotating shaft being consistent with the minimum rotation angle of the rotor, the second magnet assembly being able to rotate relative to the first magnet assembly, the first magnet assembly and the second magnet assembly being magnetically attracted to each other to apply a self-locking force to the rotor in a stationary state.

[0006] After adopting the above technical scheme, the utility model has the following advantages: first, by arranging a first magnet assembly on the shell and a second magnet assembly on the rotor or the rotating shaft, the first magnet assembly and the second magnet assembly both include multiple magnets. When the motor is stationary, the magnetic attraction of the multiple magnets between the first magnet assembly and the second magnet assembly can significantly increase the self-locking force of the motor to prevent accidental rotation. Secondly, the poles of two adjacent magnets in the multiple magnets are staggered, and the angle formed by the two adjacent magnets in the circumferential direction of the rotating shaft is consistent with the minimum rotation angle of the rotor, so that the magnetic force angle of the rotor is consistent with the angle of one rotation of the rotor, so that the motor runs more smoothly, and minimizes vibration and noise as well as the frustration of motor braking. At the same time, the staggered arrangement of the poles of the two adjacent magnets can also make the force on the rotor more balanced, reduce the torque fluctuation on the rotor, and further make the motor run more smoothly.

[0007] Furthermore, the magnetic poles of the multiple magnets of the first magnet assembly and the multiple magnets of the second magnet group are opposite.

[0008] By adopting the above technical solution, since like poles repel each other and unlike poles attract each other, there is a mutual attraction between the magnets of the first magnet assembly and the magnets of the second magnet group, which can provide the motor with a more stable self-locking force.

[0009] Furthermore, two adjacent magnets among the plurality of magnets are separated by a non-magnetic member.

[0010] By adopting the above-mentioned technical solution, the non-magnetic parts are used to prevent the installation failure of two adjacent magnets due to mutual attraction, making the installation of the magnets easier, and also avoiding magnetic interference between the two adjacent magnets, thereby ensuring a more reasonable magnetic field distribution inside the motor and making the motor run more smoothly.

[0011] Furthermore, the first magnet assembly and the second magnet assembly are arranged side by side along the axial direction of the rotating shaft; or, the first magnet assembly is sleeved on the second magnet assembly; or, the second magnet assembly is sleeved on the first magnet assembly.

[0012] By adopting the above-mentioned technical solution, the first magnet assembly and the second magnet assembly are arranged side by side along the axial direction of the rotating shaft, which is suitable for motors with larger axial space; the first magnet assembly is sleeved on the second magnet assembly, or the second magnet assembly is sleeved on the first magnet assembly, which can make full use of the radial space of the motor and make the motor structure more compact. The sleeved arrangement can increase the magnetic attraction between the magnet assemblies and improve the self-locking force of the motor when it is stationary.

[0013] Further, the first magnet assembly and the second magnet assembly are both arranged in the shell; or, at least one group of the first magnet assembly and the second magnet assembly is arranged outside the shell.

[0014] By adopting the above-mentioned technical solution, placing all the magnet components in the shell can realize the compactness of the motor structure and save space. The shell can provide physical protection for the magnet to prevent external factors from damaging the magnet, and can also ensure the self-locking force of the motor when it is stationary; the external setting can reduce the interference with the magnetic field of the motor itself, further making the operation of the motor smoother, and it can also make it easier to replace or upgrade the magnet components, improve the scalability of the motor, and can also better utilize external air for natural cooling to improve the heat dissipation effect.

[0015] Furthermore, the first magnet assembly and the second magnet assembly are located on the same side of the rotor and the stator.

[0016] By adopting the above scheme, the hysteresis loss between the magnets can be reduced by positioning the magnet assemblies on the same side, further improving the self-locking force of the motor. The distance between the first magnet assembly and the second magnet assembly can also be shortened, effectively improving the magnetic force between the first magnet assembly and the second magnet assembly, thereby improving the self-locking force of the motor.

[0017] Furthermore, the first magnet assembly and the second magnet assembly each include a mounting seat having a plurality of mounting slots, wherein positioning magnetic sheets with staggered magnetic poles are preset in the mounting slots, and the plurality of magnets are mounted in the mounting slots through magnetic attraction of the positioning magnetic sheets.

[0018] By adopting the above-mentioned technical solution, the magnet can be directly installed in the mounting groove through the magnetic attraction of the positioning magnetic sheet, which simplifies the assembly process and improves the assembly efficiency. In addition, through the magnetic attraction of the positioning magnetic sheet, the magnet is more stable in the mounting groove and the displacement of the magnet caused by vibration is reduced.

[0019] Furthermore, the first magnet assembly is arranged on the end cover, and the first magnet assembly includes a first mounting seat for mounting multiple magnets, the first mounting seat is provided with a lug, and the end cover is provided with a receiving groove for accommodating the first mounting seat, and the lug is mounted on the end cover through a fastener.

[0020] Through the above technical solution, the first mounting seat can be easily positioned and fixed on the end cover by mounting the lug on the end cover through the fastener, thereby simplifying the assembly process.

[0021] Furthermore, the first mounting seat includes a first base plate having a plurality of first mounting grooves and a first cover plate that can cover the plurality of first mounting grooves, the first mounting grooves are used to accommodate a plurality of magnets, the first cover plate covers the base plate and contacts the magnets to limit the magnets from leaving the first mounting grooves.

[0022] Through the above technical solution, the magnets can be effectively fixed by the cooperation between the first cover plate and the first bottom plate, so that multiple magnets can be installed at the same time, and the magnets can be prevented from being attracted by magnetic force and leaving the installation slots.

[0023] Furthermore, the second magnet assembly includes a second mounting seat for mounting multiple magnets, and the motor also includes an end plate for fixing the rotor, the end plate is provided with a connecting portion that is sleeved on the rotating shaft and extends toward the second mounting seat, and the second mounting seat is provided with a connecting hole for inserting the connecting portion.

[0024] Through the above technical solution, the second magnet assembly is directly fixed on the end plate used to fix the rotor, reducing additional components. By inserting the connecting part into the connecting hole on the second mounting base, the second magnet assembly can be easily positioned and fixed on the end plate of the rotor, simplifying the assembly process. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The utility model is further described below in conjunction with the accompanying drawings:

[0026] Figure 1 It is a cross-sectional view of the motor for improving the self-locking force of the utility model;

[0027] Figure 2 It is a partial structural schematic diagram of the motor for improving the self-locking force of the utility model;

[0028] Figure 3 This is a schematic diagram of the structure in which the first magnet assembly of the utility model is installed on the rear end cover;

[0029] Figure 4 It is a structural schematic diagram of a magnet in the first magnet assembly of the utility model;

[0030] Figure 5 It is a structural schematic diagram of the first bottom plate in the first magnet assembly of the utility model;

[0031] Figure 6 It is a structural schematic diagram of the rear end cover of the utility model;

[0032] Figure 7 This is a schematic diagram of the installation structure of the second magnet assembly of the utility model;

[0033] Figure 8 It is a structural schematic diagram of the rotating shaft and the rotor of the utility model;

[0034] Fig. 9 It is a structural schematic diagram of the second magnet assembly of the utility model;

[0035] Fig.10 It is a schematic diagram of the structure of the magnet in the second magnet assembly of the utility model;

[0036] Fig.11 It is a structural schematic diagram of the second bottom plate in the second magnet assembly of the utility model;

[0037] In the figure, 10, front end cover; 11, rear end cover; 111, retaining ring; 112, spacer ring; 12, stator housing; 13, accommodating groove; 14, opening; 15, installation space; 16, connecting shaft; 17, bearing; 18, reinforcing rib; 20, rotating shaft; 30, stator; 40, rotor; 50, first magnet assembly; 51, first mounting seat; 53, first mounting groove; 54, lug; 55, first base plate; 56, first cover plate; 60, second magnet assembly; 61, second mounting seat; 62, second base plate; 63, second cover plate; 64, boss; 65, connecting hole; 66, second mounting groove; 70, magnet; 80, end plate; 81, connecting part; 82, square tenon; 90, commutator. DETAILED DESCRIPTION

[0038] In order to make the purpose, technical solutions and advantages of the embodiments of the utility model clearer, the technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments.

[0039] The terms "first", "second", "third", "fourth", etc. (if any) in the specification and claims of the present utility model and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the utility model described herein can be implemented in an order other than those illustrated or described herein.

[0040] It should be understood that in various embodiments of the present invention, the size of the serial number of each process does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present invention.

[0041] It should be understood that in the present invention, "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or apparatus comprising a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to these processes, methods, products or apparatuses.

[0042] It should be understood that in the present utility model, "plurality" refers to two or more than two. "And / or" is only a description of the association relationship of associated objects, indicating that three relationships may exist. For example, X and / or Y can represent: X exists alone, X and Y exist at the same time, and Y exists alone. The character " / " generally indicates that the objects associated before and after are in an "or" relationship. "Contains X, Y and Z", "Contains X, Y, Z" means that X, Y, and Z are all included, "Contains X, Y or Z" means that one of X, Y, and Z is included, and "Contains X, Y and / or Z" means that any one, any two, or any three of X, Y, and Z are included.

[0043] The following specific embodiments are used to describe the technical solution of the utility model in detail. The following specific embodiments can be combined or replaced with each other according to actual conditions, and the same or similar concepts or processes may not be described in detail in some embodiments.

[0044] like Figures 1 to 11 As shown, the utility model provides a motor with a self-locking force, which is mainly suitable for a lifting table. The motor includes a housing, a rotating shaft 20, a stator 30, a rotor 40 and a commutator 90. The housing includes a front cover 10 and a rear cover 11 and a stator housing 12 located between the front cover 10 and the rear cover 11. The front cover 10 and the rear cover 11 can be connected through a connecting shaft 16. The rotor 40 is fixed on the rotating shaft 20. The commutator 90 is arranged on the rotating shaft 20. The stator 30 is sleeved on the rotor 40 and fixed on the stator housing 12. The rotor 40 can be relative to the stator 30. 0 is rotated to rotate the shaft 20, a first magnet assembly 50 is provided on the housing, a second magnet assembly 60 spaced from the first magnet assembly 50 is provided on the rotor 40 or the shaft 20, the first magnet assembly 50 and the second magnet assembly 60 both include a plurality of magnets 70, the plurality of magnets 70 are arranged along the circumference of the shaft 20 and sleeved on the shaft 20, the magnetic poles of two adjacent magnets 70 in the plurality of magnets 70 are staggered, the angle formed by the two adjacent magnets 70 in the circumference of the shaft 20 is consistent with the minimum rotation angle of the rotor 40, the shaft 20 and the rotor 40 are coaxially arranged, as shown in FIG. Figure 4 As shown, the angle formed by two adjacent magnets 70 in the circumferential direction of the rotating shaft 20 is α, and the second magnet assembly 60 can rotate relative to the first magnet assembly 50. The first magnet assembly 50 and the second magnet assembly 60 are magnetically attracted to each other to apply a self-locking force to the rotor 40 in a stationary state.

[0045] Firstly, by setting a first magnet assembly 50 on the shell and a second magnet assembly 60 on the rotor 40 or the rotating shaft 20, the first magnet assembly 50 and the second magnet assembly 60 both include a plurality of magnets 70. When the motor is stationary, the magnetic attraction of the plurality of magnets 70 between the first magnet assembly 50 and the second magnet assembly 60 can significantly increase the self-locking force of the motor and prevent accidental rotation. Secondly, the poles of two adjacent magnets 70 in the plurality of magnets 70 are staggered, and the angle formed by the two adjacent magnets 70 in the circumferential direction of the rotor 40 is consistent with the minimum rotation angle of the rotor 40, so that the magnetic force angle of the rotor 40 received by the magnet 70 is consistent with the angle of one rotation of the rotor 40, so that the motor runs more smoothly, and the vibration, noise and the sense of frustration of the motor brake are reduced as much as possible. At the same time, the staggered arrangement of the poles of the two adjacent magnets 70 can also make the force on the rotor 40 more balanced, reduce the torque fluctuation on the rotor 40, and further make the motor run more smoothly.

[0046] Among them, the multiple magnets 70 of the first magnet assembly 50 and the multiple magnets 70 of the second magnet assembly 60 have opposite magnetic poles. Since like poles repel each other and opposite poles attract each other, there is a mutual attraction between the magnets 70 of the first magnet assembly 50 and the magnets 70 of the second magnet assembly 60, which can provide the motor with a more stable self-locking force.

[0047] Since the magnetic force between the mutual magnets 70 is related to the distance between the magnets 70, the first magnet assembly 50 and the second magnet assembly 60 are located on the same side of the rotor 40 and the stator 30, which can shorten the distance between the first magnet assembly 50 and the second magnet assembly 60, effectively improve the magnetic force between the first magnet assembly 50 and the second magnet assembly 60, thereby improving the self-locking force of the motor, and can also reduce the hysteresis loss between the magnets, further improving the self-locking force of the motor.

[0048] In order to further make the motor run more smoothly, the first magnet assembly 50 and the second magnet assembly 60 are both arranged in the shell, which can realize the compactness of the motor structure and save space. The shell can provide physical protection for the magnet to prevent external factors from damaging the magnet, and can also ensure the self-locking force of the motor when it is stationary.

[0049] Furthermore, the first magnet assembly 50 and the second magnet assembly 60 are arranged in parallel along the axial direction of the rotating shaft 20 , which is suitable for a motor with a larger axial space.

[0050] Since there are a large number of magnets 70 and the magnetic poles of two adjacent magnets 70 need to be opposite, in order to facilitate the installation of the magnets 70, the first magnet assembly 50 and the second magnet assembly 60 each include a plurality of magnets 70 and a mounting seat with a plurality of mounting slots, and the mounting slots are preset with positioning magnetic sheets with staggered magnetic poles. The plurality of magnets 70 are installed in the mounting slots through the magnetic attraction of the positioning magnetic sheets, which simplifies the assembly process and improves the assembly efficiency. In addition, through the magnetic attraction of the positioning magnetic sheets, the magnets 70 are more stable in the mounting slots, reducing the displacement of the magnets caused by vibration. For the sake of distinction, the mounting seat for installing the plurality of magnets 70 of the first magnet assembly 50 is the first mounting seat 51, and the mounting seat for installing the plurality of magnets 70 of the second magnet assembly 60 is the second mounting seat 61.

[0051] In order to further make the operation of the motor more stable, two adjacent magnets 70 among the multiple magnets 70 are separated by a non-magnetic member. The non-magnetic member can avoid magnetic interference between the two adjacent magnets 70, thereby ensuring a more reasonable magnetic field distribution inside the motor, making the operation of the motor more stable. It can also be used to prevent the installation of the two adjacent magnets 70 from failing due to mutual attraction, making the installation of the magnets 70 easier. In this embodiment, the side wall of the installation groove is a non-magnetic member, and the two adjacent magnets 70 are separated by the side wall of the installation groove. Among them, the non-magnetic member can be made of plastic, rubber, gypsum and other materials.

[0052] Among them, the rotating shaft 20 is installed on the rear end cover 11 through the bearing 17. The rear end cover 11 is provided with a spacer 112 surrounding the bearing 17. The spacer 112 forms an installation space 15 for installing the bearing 17. The rear end cover 11 is provided with a retaining ring 111 sleeved outside the spacer 112. A receiving groove 13 for accommodating the first mounting seat 51 is formed between the retaining ring 111 and the spacer 112. The retaining ring is provided with an opening 14, and a reinforcing rib 18 is provided at the opening 14. The reinforcing rib 18 is provided with a screw hole. The first mounting seat 51 is provided with a lug 54. After the lug 54 passes through the opening 14, the fastener passes through the lug 54 and the screw hole to install the first mounting seat 51, which simplifies the assembly process. The inner wall of the opening 14 can limit the lug 54, so that the installation of the entire first magnet assembly 50 is more stable. It can also be separated from the bearing 17 to avoid the first mounting seat 51 from interfering with the rotation of the bearing 17.

[0053] Specifically, the first mounting seat 51 includes a first base plate 55 having a plurality of first mounting grooves 53 and a first cover plate 56 that can cover the plurality of first mounting grooves 53. The first mounting grooves 53 are used to accommodate a plurality of magnets 70. The first cover plate 56 is provided with a through hole for the above-mentioned fastener to pass through. The first cover plate 56 covers the first base plate 55 and contacts the magnet 70 to limit the magnet 70 from being separated from the first mounting groove 53. The fastener first passes through the through hole and then passes through the lug 54 and the rear end cover 11 for fixing. The magnet 70 can be effectively fixed, and a plurality of magnets 70 can be installed at the same time to prevent the magnet 70 from being attracted by magnetic force and being separated from the first mounting groove 53.

[0054] The second magnet assembly 60 includes a second mounting seat 61 for mounting a plurality of magnets 70. The motor also includes an end plate 80 for fixing the rotor 40. The end plate 80 is provided with a connecting portion 81 which is sleeved on the rotating shaft 20 and extends toward the second mounting seat 61. The second mounting seat 61 is provided with a connecting hole 65 for inserting the connecting portion 81. This reduces additional components, makes it easy to position and fix the second magnet assembly 60 on the end plate 80 of the rotor 40, and simplifies the assembly process.

[0055] In order to improve the installation stability of the second mounting seat 61, a square tenon 82 is provided at the tail end of the connecting part 81, and a boss 64 extending toward the rotor 40 is provided on the second mounting seat 61. A connecting hole 65 is provided on the boss 64, and the connecting hole 65 is a tenon hole that is interference fit with the square tenon 82. The setting of the boss 64 can increase the fitting length between the second mounting seat 61 and the connecting part 81, and improve the connection strength between the two, so that the second magnet assembly 60 is more stable during the high-speed rotation of the rotor 40.

[0056] The second mounting seat 61 also includes a second bottom plate 62 having at least a plurality of second mounting grooves 66 and a second cover plate 63 that can cover the second mounting grooves 66. The boss 64 is arranged on the second bottom plate 62. The second cover plate 63 is provided with a connecting rib, the connecting rib is provided with a screw hole, the boss 64 is provided with a screw hole, and the fastener passes through the screw hole of the connecting rib and the screw hole of the boss 64 in sequence to realize the assembly of the second cover plate 63 and the second bottom plate 62. The commutator 90 is arranged between the rotor 40 and the front end cover 10, and the second magnet assembly 60 and the first magnet assembly 50 are located between the rotor 40 and the rear end cover 11, and are arranged to be separated from each other.

[0057] The technicians can use the scribing method, the two-dimensional coordinate method, etc., to record the angles before and after one rotation with the axis center point of the rotating shaft 20 as the origin to measure the minimum angle of one rotation of the rotor 40. For example, if the rotation angle of the rotor 40 is measured to be 36°, then the angle formed by the two magnets 70 is 36°, and the angle of one magnet is 18°. Therefore, the number of magnets 70 required is 360 / 18=20. Therefore, the first magnet assembly 50 and the second magnet assembly 60 are both provided with 20 magnets 70, and the magnetic poles of the 20 magnets 70 are staggered.

[0058] In order to cope with different situations, the self-locking force provided by the device can be changed by adjusting the magnetic force of the internal magnet 70, the number of magnet 70 pairs, or replacing magnets 70 of different materials so that the product can adapt to different working conditions. Different mounting seats and magnets 70 can be customized according to the minimum rotation angle of different models to make the transposition more suitable.

[0059] It should be noted that in a motor, when the number of pairs of magnets 70 needs to be changed, the angle between two adjacent magnets 70 in the circumferential direction of the rotor 40 still needs to remain unchanged.

[0060] In order to distinguish the positive and negative poles of the magnet 70 , the positive pole of the magnet 70 is marked with a “+” and the negative pole of the magnet 70 is marked with a “—”.

[0061] It should be noted that in this embodiment, the magnet 70 mainly adopts a sheet-shaped structure to ensure the required magnetic force while reducing the axial size of the magnet 70 in the motor and the weight of the magnet 70 to minimize the resistance to the motor rotation. The magnet 70 is magnetized in the radial direction.

[0062] It should be noted that the torque of the motor is relatively large when it rotates, while the magnetic force between the first magnet assembly 50 and the second magnet assembly 60 is relatively small, so the influence on the rotation process of the motor is as small as possible.

[0063] It can be understood that in other embodiments, at least one group of the first magnet assembly and the second magnet assembly is arranged outside the shell. The external setting can reduce the interference with the magnetic field of the motor itself, further make the operation of the motor smoother, and also make it easier to replace or upgrade the magnet assembly, thereby improving the scalability of the motor, and also can better utilize the external air for natural cooling to improve the heat dissipation effect.

[0064] It is understandable that in other embodiments, the first magnet assembly is sleeved on the second magnet assembly, and the first magnet assembly is fixed on the inner wall of the housing, which can make full use of the radial space of the motor and make the motor structure more compact. The sleeve arrangement can increase the magnetic attraction between the magnet assemblies and improve the self-locking force of the motor in a stationary state. Of course, the second magnet assembly can also be sleeved on the first magnet assembly.

[0065] It is understandable that in other embodiments, positive and negative pole markings may be provided in the installation slot to guide the installation of the magnet. The markings may be provided in different colors or in text. The markings are not limited thereto. This prevents the magnet from being installed incorrectly.

[0066] It is understandable that in other embodiments, a non-magnetic patch may be directly provided to separate two adjacent magnets.

[0067] It can be understood that in other embodiments, the first mounting seat can also be installed on the front end cover, accordingly.

[0068] It can be understood that the boss can also be provided with a connecting hole of a triangular, elliptical or other special shape, and the portion of the connecting part inserted into the connecting hole is a special-shaped structure adapted to the connecting hole, which can effectively prevent the connecting part from loosening during operation and improve the stability of the connection.

[0069] In addition to the above-mentioned preferred embodiments, the present invention also has other implementation modes. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative work are within the scope of protection requested by the present invention.

Claims

1. A motor for improving self-locking force, comprising a housing, a rotating shaft, a stator and a rotor, wherein the rotor is fixed on the rotating shaft, the stator is sleeved on the rotor, and the rotor can rotate relative to the stator to rotate the rotating shaft, characterized in that: A first magnet assembly is provided on the shell, and a second magnet assembly spaced from the first magnet assembly is provided on the rotor or the rotating shaft. The first magnet assembly and the second magnet assembly both include a plurality of magnets, and the plurality of magnets are arranged along the circumference of the rotating shaft and sleeved on the rotating shaft. The magnetic poles of two adjacent magnets among the plurality of magnets are staggered, and the angle formed by the two adjacent magnets in the circumference of the rotating shaft is consistent with the minimum rotation angle of the rotor. The second magnet assembly can rotate relative to the first magnet assembly, and the first magnet assembly and the second magnet assembly are magnetically attracted to each other to apply a self-locking force to the rotor in a stationary state.

2. The motor for improving the self-locking force according to claim 1, characterized in that: The magnets of the first magnet assembly and the magnets of the second magnet assembly have opposite magnetic poles.

3. The motor for improving the self-locking force according to claim 1, characterized in that: Two adjacent magnets among the plurality of magnets are separated by a non-magnetic member.

4. The motor for improving the self-locking force according to claim 1, characterized in that: The first magnet assembly and the second magnet assembly are arranged side by side along the axial direction of the rotating shaft; or, the first magnet assembly is sleeved on the second magnet assembly; or, the second magnet assembly is sleeved on the first magnet assembly.

5. The motor for improving the self-locking force according to claim 1, characterized in that: The first magnet assembly and the second magnet assembly are both disposed in the shell; or at least one group of the first magnet assembly and the second magnet assembly is disposed outside the shell.

6. The motor for improving the self-locking force according to claim 1, characterized in that: The first magnet assembly and the second magnet assembly are located on the same side of the rotor and the stator.

7. The motor for improving the self-locking force according to claim 1, characterized in that: The first magnet assembly and the second magnet assembly are both provided with a mounting seat with a plurality of mounting slots, wherein positioning magnetic sheets with staggered magnetic poles are preset in the mounting slots, and the plurality of magnets are mounted in the mounting slots by magnetic attraction of the positioning magnetic sheets.

8. The motor for improving the self-locking force according to claim 1, characterized in that: The shell includes end covers located at both ends of the rotating shaft, the first magnet assembly includes a first mounting seat for mounting multiple magnets, the first mounting seat is provided with a lug, the end cover is provided with a receiving groove for accommodating the first mounting seat, and the lug is installed on the end cover through a fastener.

9. The motor for improving the self-locking force according to claim 8, characterized in that: The first mounting seat includes a first base plate having a plurality of first mounting grooves and a first cover plate that can cover the plurality of first mounting grooves, the first mounting grooves are used to accommodate a plurality of magnets, the first cover plate covers the base plate and contacts the magnets to limit the magnets from leaving the first mounting grooves.

10. The motor for improving the self-locking force according to claim 1, characterized in that: The second magnet assembly includes a second mounting seat for mounting a plurality of magnets. The motor also includes an end plate for fixing the rotor. The end plate is provided with a connecting portion which is sleeved on the rotating shaft and extends toward the second mounting seat. The second mounting seat is provided with a connecting hole for inserting the connecting portion.

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