Motor

Abstract

The utility model provides a motor, and relates to the technical field of motors. The motor comprises a rotor, a stator and magnetic steel. A mounting groove for mounting magnetic steel is formed in the circumferential surface of one side, facing the stator, of the rotor, at least one glue containing groove is formed in the mounting groove, and the groove bottom area of each glue containing groove is smaller than or equal to half of the groove bottom area of the mounting groove. The magnetic steel and the rotor can be bonded more smoothly, glue is saved, the magnetic circuit reluctance of the motor is reduced, and the performance of the motor is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of motors, and more specifically, to a motor. Background Art

[0002] Motors generally include inner-rotor motors and outer-rotor motors. For an inner-rotor motor, the stator is on the outside and the rotor rotates to generate power. For an outer-rotor motor, the structure is opposite, with the stator in the middle of the motor and the rotor on the outside. The outer-rotor motor has the advantages of high efficiency, low noise, light weight, compact structure, convenient installation and maintenance, etc.

[0003] After research by the inventor, it is found that in the rotor assembly of the existing motor structure, most of the permanent magnets are closely arranged in a surface-mounted manner, and there are problems such as glue overflow and uneven sticking between the permanent magnets and the rotor, which makes it easy to have a gap between the permanent magnets and the rotor, thereby increasing the magnetic resistance of the magnetic circuit and affecting the performance of the motor. Summary of the Utility Model

[0004] One of the purposes of the utility model is to provide a motor, which can make the bonding between the permanent magnet and the rotor more flat, reduce the magnetic resistance of the magnetic circuit of the motor, and improve the performance of the motor.

[0005] Another purpose of the utility model is to provide a motor, which can reduce magnetic leakage, is convenient for installation, and saves materials.

[0006] The embodiments of the utility model are implemented as follows:

[0007] In a first aspect, the utility model provides a motor, including a rotor, a stator and permanent magnets;

[0008] On the circumferential surface of the rotor facing the stator, there is an installation groove for installing the permanent magnets, and at least one glue-containing groove is arranged in the installation groove, and the bottom area of a single glue-containing groove is less than or equal to half of the bottom area of the installation groove.

[0009] In an alternative embodiment, the glue-containing groove is arranged on the bottom wall and / or side wall of the installation groove.

[0010] In an alternative embodiment, a plurality of spaced-apart glue-containing grooves are arranged at the bottom of the installation groove.

[0011] In an alternative embodiment, a plurality of recessed parts are arranged at the bottom of each glue-containing groove.

[0012] In an alternative embodiment, a plurality of guide posts are arranged on the rotor, and an installation groove for installing the permanent magnets is formed between adjacent guide posts.

[0013] In a second aspect, the utility model provides a motor, including a rotor, a stator and permanent magnets;

[0014] A plurality of guiding columns are provided on the circumferential surface of the rotor facing the stator side, and mounting grooves for mounting the permanent magnets are formed between adjacent guiding columns. The height of the guiding columns is less than or equal to half of the thickness of the permanent magnets.

[0015] In an alternative embodiment, the guiding column includes a connected side surface and a top surface. The top surface is disposed opposite to the circumferential surface of the rotor facing the stator side; the side surface is connected to the rotor on the side away from the top surface; a transition guiding surface is provided at the connection between the side surface and the top surface, and the transition guiding surface is a convex arc surface or an inclined surface.

[0016] In an alternative embodiment, the height of the guiding column protruding along the radial direction of the rotor is H1, and the length of a single guiding column along the circumferential direction is H2. The ratio of H1 to H2 is 0.5:3.42 to 0.5:0.857, or 0.5:2.57 to 0.5:0.857.

[0017] In an alternative embodiment, one or more glue-containing grooves are provided in the mounting groove.

[0018] In an alternative embodiment, the cross-section of the permanent magnet is square, and / or the surface of the permanent magnet away from the rotor is a flat surface;

[0019] The flat surface includes at least a first position and a second position. There is a first radial distance between the first position and the circumferential surface of the stator facing the rotor, and a second radial distance between the second position and the circumferential surface of the stator facing the rotor; the first distance and the second distance are not equal.

[0020] The beneficial effects of the embodiments of the present invention include:

[0021] A motor provided by the present invention is provided with glue-containing grooves in the mounting grooves of the permanent magnets, and the bottom area of the glue-containing grooves is less than or equal to half of the bottom area of the mounting grooves. The glue-containing grooves are used to contain glue to realize the bonding of the permanent magnets and the rotor. The provision of the glue-containing grooves can avoid glue overflow, save glue, make the glue distribution more uniform, the bonding more flat, which is beneficial to improving the dynamic balance of the rotor rotation, reducing the magnetic circuit magnetic resistance of the motor, and enhancing the motor performance.

[0022] The motor provided by the present invention is provided with guiding columns for mounting permanent magnets, and the height of the guiding columns is less than or equal to half of the thickness of the permanent magnets. Such a setting is beneficial to reducing magnetic leakage, facilitating installation, saving materials, reducing costs, and enhancing the motor performance. Description of the Drawings

[0023] To more clearly illustrate the technical solutions of the embodiments of the present utility model, the accompanying drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following accompanying drawings only show certain embodiments of the present utility model and should not be regarded as limiting the scope. For those of ordinary skill in the art, without creative efforts, other related accompanying drawings can also be obtained based on these drawings.

[0024] Figure 1 Schematic diagram of the main structure of the motor provided by the embodiment of the present utility model;

[0025] Figure 2 Schematic diagram of the structure of the rotor and the permanent magnet of the motor provided by the embodiment of the present utility model from the first perspective;

[0026] Figure 3 Schematic diagram of the structure of the rotor and the permanent magnet of the motor provided by the embodiment of the present utility model from the second perspective;

[0027] Figure 4 Partial enlarged schematic diagram of the permanent magnet pasted on the rotor of the motor provided by the embodiment of the present utility model;

[0028] Figure 5 Partial enlarged schematic diagram of the rotor of the motor provided by the embodiment of the present utility model;

[0029] Figure 6 Another partial enlarged schematic diagram of the rotor of the motor provided by the embodiment of the present utility model from a different perspective.

[0030] Icons: 100 - Rotor; 200 - Stator; 300 - Permanent magnet; 110 - Installation groove; 120 - Glue storage groove; 121 - Depressed part; 130 - Guide post; 131 - Top surface; 133 - Side surface; 135 - Transition guide surface; 400 - Motor shaft. Detailed implementation manners

[0031] To make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. Generally, the components of the embodiments of the present utility model described and shown in the accompanying drawings here can be arranged and designed in various different configurations.

[0032] Accordingly, the following detailed description of the embodiments of the present utility model provided in the drawings is not intended to limit the scope of the claimed present utility model, but merely represents selected embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present utility model without creative efforts shall fall within the scope of protection of the present utility model.

[0033] It should be noted that like reference numerals and letters denote like items in the following drawings. Therefore, once an item is defined in one drawing, it does not require further definition and explanation in subsequent drawings.

[0034] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the utility model product is customarily placed during use. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present utility model. In addition, terms such as "first", "second", "third", etc. are only used for descriptive distinction and should not be construed as indicating or implying relative importance.

[0035] In addition, terms such as "horizontal" and "vertical" do not mean that the components are required to be absolutely horizontal or hanging vertically, but can be slightly inclined. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0036] In the description of the present utility model, it should also be noted that unless otherwise clearly defined and limited, the terms "set", "install", "connect", and "couple" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0037] Please refer to Figures 1 to 4, this embodiment provides a motor, including a rotor 100, a stator 200 and a permanent magnet 300. An installation groove 110 for installing the permanent magnet 300 is provided on the circumferential surface of the rotor 100 facing the stator 200. At least one glue containing groove 120 is provided in the installation groove 110, and the bottom area of a single glue containing groove 120 is less than or equal to half of the bottom area of the installation groove 110. The glue containing groove 120 is used to contain glue to realize the bonding between the permanent magnet 300 and the rotor 100. The arrangement of the glue containing groove 120 can avoid glue overflow, save glue, make the glue distribution more uniform, the paste more flat, which is beneficial to improving the dynamic balance of the rotation of the rotor 100, reducing the magnetic circuit magnetic resistance of the motor and enhancing the motor performance.

[0038] It can be understood that the rotor 100 can be used for an outer rotor motor or an inner rotor motor. If an outer rotor motor is adopted, the permanent magnet 300 is pasted on the inner circumferential surface of the rotor 100. If an inner rotor motor is adopted, the permanent magnet 300 is pasted on the outer circumferential surface of the rotor 100. In this embodiment, the outer rotor motor is taken as an example for illustration.

[0039] The glue containing groove 120 is provided on the bottom wall and / or the side wall of the installation groove 110. The glue containing groove 120 can be provided on the bottom wall of the installation groove 110, or can be provided on the side wall of the installation groove 110. Or, the glue containing grooves 120 are respectively provided on the bottom wall and the side wall of the installation groove 110. No specific limitation is made here.

[0040] Optionally, a plurality of spaced-apart glue containing grooves 120 are provided on the bottom of the installation groove 110 (i.e., the bottom wall). Three evenly spaced glue containing grooves 120 are shown in the figure. The shape, size, quantity and arrangement position of the glue containing groove 120 can be flexibly set according to actual needs.

[0041] In this embodiment, 28 installation grooves 110 are arranged in a circumferential array on the inner circumferential surface of the rotor 100, and one permanent magnet 300 is installed in each installation groove 110. That is, 28 permanent magnets 300 are pasted along the inner circumferential surface of the rotor 100. Three glue containing grooves 120 are provided in each installation groove 110. In this way, the force received by the bonding of the permanent magnet 300 can be made uniform, the glue consumption can be greatly reduced, the permanent magnet 300 can be pasted more flatly, and there is no gap between the permanent magnet 300 and the surface of the rotor 100, so as to improve the dynamic balance effect, reduce the magnetic circuit magnetic resistance and enhance the motor performance.

[0042] It should be noted that the number of the installation grooves 110 and the number of the permanent magnets 300 are determined according to the motor design parameters, and the specific number can be flexibly adjusted. The number of the glue containing grooves 120 in each installation groove 110 can also be two, four, five, six or more. The shapes and sizes of the plurality of glue containing grooves 120 can be the same or different. If the glue containing grooves 120 are respectively provided on the bottom wall and the side wall of the installation groove 110, the shapes and sizes of the glue containing grooves 120 on the bottom wall and the side wall can be the same or different.

[0043] Combined with Figure 5 and Figure 6 ,the bottom of the glue storage groove 120 can be arc-shaped, U-shaped, V-shaped, etc. Optionally, a plurality of recessed portions 121 are provided at the bottom of each glue storage groove 120. The plurality of recessed portions 121 can be arranged continuously or at intervals. For example, the plurality of recessed portions 121 make the bottom of the glue storage groove 120 approximately wavy, W-shaped or pulse-shaped. The cross-section of each recessed portion 121 can be triangular, rectangular, square, arched, semi-circular, trapezoidal or hexagonal, etc. With such a setting, the glue storage capacity is relatively larger, the bonding is more stable, flatter, the dynamic balance effect is higher, and the magnetic circuit reluctance is smaller.

[0044] In this embodiment, three spaced recessed portions 121 are provided at the bottom of each glue storage groove 120, and the cross-section of each recessed portion 121 is trapezoidal, that is, the notch of the glue storage groove 120 gradually increases from outside to inside along the radial direction. Of course, it is not limited to this, and the shape, quantity, arrangement position, etc. of the glue storage groove 120 can be flexibly designed according to actual situations.

[0045] Optionally, a plurality of guide posts 130 are provided on the rotor 100, and an installation groove 110 for installing the magnet 300 is formed between adjacent guide posts 130. The guide posts 130 can separate adjacent magnets 300. And when installing the magnet 300, it plays a role of positioning and guiding, which is convenient for installation.

[0046] In this embodiment, 28 guide posts 130 are convexly provided in an annular array on the inner circumferential surface of the rotor 100, and 28 installation grooves 110 are formed on the inner circumferential surface of the rotor 100. The height of the guide post 130 is less than or equal to half of the thickness of the magnet 300. This is beneficial to reducing magnetic leakage, facilitating installation and guiding, as well as saving materials and costs.

[0047] Optionally, the guide post 130 includes a connected side surface 133 and a top surface 131, and the top surface 131 is disposed opposite to the circumferential surface of the rotor 100 on the side facing the stator 200; one side of the side surface 133 away from the top surface 131 is connected to the rotor 100; a transition guide surface 135 is provided at the connection between the side surface 133 and the top surface 131, and the transition guide surface 135 is an outwardly convex arc surface or an inclined surface, which can play a better guiding role, is more convenient for installation, and improves the installation efficiency.

[0048] Optionally, the height of the guide post 130 protruding along the radial direction of the rotor 100 is H1, and the length of a single guide post 130 along the circumferential direction is H2, and H2 = kL / N; where L is the circumference of the inner circumference of the rotor 100; N is the number of magnets; K is a coefficient, and the value ranges from 10% to 30% or 10% to 40%. If it is used in an inner rotor motor, then L is the circumference of the outer circumference of the rotor 100.

[0049] Optionally, the ratio of H1 to H2 is 0.5:3.42 to 0.5:0.857, or 0.5:2.57 to 0.5:0.857. It is easy to understand that the sum of the circumferential lengths of all the guide posts 130 is 10% to 30% of the inner circumference of the rotor 100, or 10% to 40% of the inner circumference of the rotor 100.

[0050] In this embodiment, H1 is about 0.5 mm and H2 is about 1.3 mm.

[0051] It can be understood that if the glue storage groove 120 is provided on the side wall of the installation groove 110, the glue storage groove 120 is opened on the side of the guide post 130. In this way, the magnet 300 can be further adhered to the guide post 130.

[0052] Optionally, the cross-section of the magnet 300 is square, such as rectangular or square. The surface of the magnet 300 away from the rotor 100 is a flat surface. In this way, the distances between the magnet 300 and the outer ring of the stator 200 are not equal, which is beneficial to reducing electromagnetic noise. Of course, in some other embodiments, the magnet 300 can also be arc-shaped, as long as the radian of the magnet 300 facing the stator 200 is not equal to the radian of the outer circumference of the stator 200, the non-equal distances between the magnet 300 and the outer ring of the stator 200 can be achieved, that is, the effect of reducing electromagnetic noise can be obtained.

[0053] The embodiment of the present utility model also provides a motor, including a rotor 100, a stator 200 and a magnet 300. A plurality of guide posts 130 are provided on the circumferential surface of the rotor 100 facing the stator 200. Installation grooves 110 for installing the magnet 300 are formed between adjacent guide posts 130. The height of the guide post 130 is less than or equal to half of the thickness of the magnet 300. It is beneficial to reduce magnetic leakage, facilitate installation guidance, save materials and reduce costs.

[0054] Optionally, a transition guide surface 135 is provided between the top surface 131 and the side surface 133 of the guide post 130. The transition guide surface 135 is an outwardly convex arc surface or inclined surface. It can play a better guiding role and is more convenient and fast to install.

[0055] Optionally, the height of the guide post 130 protruding along the radial direction of the rotor 100 is H1, and the length of a single guide post 130 along the circumferential direction is H2. The ratio of H1 to H2 is 0.5:3.42 to 0.5:0.857, or 0.5:2.57 to 0.5:0.857. With such a setting, it is beneficial to reduce magnetic leakage, increase magnetic flux and improve the performance of the motor. At the same time, it can also save materials and reduce costs.

[0056] Optionally, one or more glue storage grooves 120 are provided in the installation groove 110. Each glue storage groove 120 has a plurality of recessed portions 121, which are in a tooth-like structure, facilitating more uniform distribution of the glue, flatter pasting of the magnet steel 300, and better dynamic balance. The magnet steel 300 is in good contact with the surface of the rotor 100 without gaps, enabling a smaller magnetic resistance in the magnetic circuit of the motor and better performance. In addition, it can save the amount of glue used and avoid glue overflow.

[0057] Optionally, the cross-section of the magnet steel 300 is square, and the surface of the magnet steel 300 away from the rotor 100 is a flat surface. It can be understood that the flat surface includes at least a first position and a second position. There is a first radial distance between the first position and the circumferential surface of the stator 200 facing the rotor 100, and a second radial distance between the second position and the circumferential surface of the stator 200 facing the rotor 100; the first distance and the second distance are not equal. This can make the surface of the magnet steel 300 and the outer ring of the stator 200 have unequal circumferential distances and unequal air gaps, which is beneficial to reducing electromagnetic noise.

[0058] It should be noted that the motor in this embodiment further includes a coil, a wire holder, a housing, an end cover, a motor shaft 400, bearings, etc. The assembly connection of the above components and the working principle of the motor are prior arts and will not be elaborated here.

[0059] In summary, the motor provided by the embodiment of the present utility model has the following beneficial effects:

[0060] A motor provided by the present utility model is provided with a glue storage groove 120 in the installation groove 110 for the magnet steel 300, and the bottom area of the glue storage groove 120 is less than or equal to half of the bottom area of the installation groove 110. The glue storage groove 120 is used to hold the glue to realize the bonding of the magnet steel 300 and the rotor 100. The setting of the glue storage groove 120 can avoid glue overflow, save glue, make the glue distribution more uniform, the pasting more flat, which is beneficial to improving the dynamic balance of the rotation of the rotor 100, reducing the magnetic resistance of the magnetic circuit of the motor, and enhancing the performance of the motor.

[0061] In addition, a guiding column 130 for installing the magnet steel 300 is further provided on the inner circumferential surface of the rotor 100, and an installation groove 110 is formed between adjacent guiding columns 130. And the height of the guiding column 130 is less than or equal to half of the thickness of the magnet steel 300. Such a setting is beneficial to reducing magnetic leakage, facilitating installation, saving materials, reducing costs, and enhancing the performance of the motor.

[0062] The above are only the preferred embodiments of the present utility model and are not used to limit the present utility model. For those skilled in the art, the present utility model can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model shall be included in the protection scope of the present utility model.

Claims

1. A motor, comprising a rotor (100), a stator (200) and a permanent magnet (300); characterized in that, On the circumferential surface of the rotor (100) facing the stator (200), there is an installation groove (110) for installing the permanent magnet (300). At least one glue-containing groove (120) is provided in the installation groove (110), and the bottom area of a single glue-containing groove (120) is less than or equal to half of the bottom area of the installation groove (110).

2. The motor according to claim 1, characterized in that, The glue-containing groove (120) is provided on the bottom wall and / or side wall of the installation groove (110).

3. The motor according to claim 1, characterized in that, A plurality of spaced-apart glue-containing grooves (120) are provided at the bottom of the installation groove (110).

4. The motor according to claim 1, characterized in that, A plurality of recessed portions (121) are provided at the bottom of each glue-containing groove (120).

5. The motor according to claim 1, characterized in that, A plurality of guide posts (130) are provided on the rotor (100), and an installation groove (110) for installing the permanent magnet (300) is formed between adjacent guide posts (130).

6. A motor, comprising a rotor (100), a stator (200) and a permanent magnet (300); characterized in that, A plurality of guide posts (130) are provided on the circumferential surface of the rotor (100) facing the stator (200), and an installation groove (110) for installing the permanent magnet (300) is formed between adjacent guide posts (130). The height of the guide post (130) is less than or equal to half of the thickness of the permanent magnet (300).

7. The motor according to claim 6, characterized in that, The guide post (130) includes a connected side surface (133) and a top surface (131). The top surface (131) is disposed opposite to the circumferential surface of the rotor (100) facing the stator (200); the side surface (133) is connected to the rotor (100) on the side away from the top surface (131); a transition guide surface (135) is provided at the connection between the side surface (133) and the top surface (131), and the transition guide surface (135) is a convex arc surface or an inclined surface.

8. The motor according to claim 6, characterized in that, The height of the guide post (130) protruding along the radial direction of the rotor (100) is H1, and the length of a single guide post (130) along the circumferential direction is H2, H2 = kL / N; where L is the circumference of the side of the rotor (100) for installing the permanent magnet (300); N is the number of permanent magnets; K is a coefficient, taking a value of 10% to 30% or 10% to 40%; The ratio of H1 to H2 is 0.5:3.42 to 0.5:0.857, or 0.5:2.57 to 0.5:0.

857.

9. The motor according to claim 6, characterized in that, One or more glue-containing grooves (120) are provided in the installation groove (110).

10. The electric machine according to any one of claims 1 to 9, characterized in that, The cross-section of the permanent magnet (300) is square, and / or, the surface of the permanent magnet (300) away from the rotor (100) is a flat surface; The flat surface includes at least a first position and a second position. There is a first radial distance between the first position and the circumferential surface of the stator (200) facing the rotor (100), and a second radial distance between the second position and the circumferential surface of the stator (200) facing the rotor (100); the first distance and the second distance are not equal.

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