Magnetic ring structure, motor and vehicle

Abstract

The embodiment of the utility model discloses a magnetic ring structure, a motor and a vehicle, and the structure comprises a magnet which is provided with a first through hole; the plastic coating body is connected with the magnet and distributed in the axial direction, a second penetrating hole communicated with the first penetrating hole in the axial direction is formed in the plastic coating body, and the inner diameter of the second penetrating hole is smaller than that of the first penetrating hole; wherein the first penetrating hole and the second penetrating hole are both used for penetrating a shaft body, and the inner wall of the first penetrating hole is suitable for being in clearance fit with the peripheral wall of the shaft body. The magnetic ring structure provided by the embodiment of the utility model is simple in structure and convenient to assemble, the plastic-coated body can be suitable for different magnets, the arrangement flexibility can be improved, the manufacturing cost is reduced, and the magnets are in clearance fit with the shaft body, so that the situations of cracking and the like when the magnets are mounted on the shaft body can be avoided, the service life of the magnetic ring structure is prolonged, and the use effect is better; and the application range is wider.

Description

Technical Field

[0001] The utility model relates to the technical field of motor manufacturing, in particular to a magnetic ring structure, a motor and a vehicle. Background Art

[0002] A motor is an electromagnetic device that converts or transfers electrical energy based on the law of electromagnetic induction. It is designed into different types as a power source for electrical appliances or various machines. To ensure the normal operation of the motor, its rotor structure is provided with a bushing and a magnet. However, in the prior art, the structure of the bushing and the magnetic ring is complex, the manufacturing cost is high, and after being installed on the shaft body, the inner hole of the magnet is prone to cracking and other situations due to the outward expansion force of the shaft body, which affects the operation reliability of the motor and there is room for improvement. Summary of the Utility Model

[0003] The utility model aims to at least solve one of the technical problems existing in the prior art. For this purpose, the utility model provides a magnetic ring structure with a simple structure, high setting flexibility, which can avoid situations such as cracking of the magnet, extend the service life of the magnetic ring structure, and reduce the manufacturing cost.

[0004] The magnetic ring structure according to an embodiment of the utility model includes: a magnet, the magnet is formed with a first through hole; a plastic-coated body, the plastic-coated body is connected to the magnet and distributed along the axial direction, the plastic-coated body is formed with a second through hole axially communicating with the first through hole, and the inner diameter of the second through hole is smaller than the inner diameter of the first through hole; wherein, both the first through hole and the second through hole are used for passing through a shaft body, and the inner wall of the first through hole is adapted to have a clearance fit with the outer peripheral wall of the shaft body.

[0005] The magnetic ring structure according to an embodiment of the utility model has a simple structure, is convenient for assembly, and the plastic-coated body can be applied to different magnets, which can improve the setting flexibility, reduce the manufacturing cost, and the magnet and the shaft body have a clearance fit, thereby avoiding situations such as cracking when the magnet is installed on the shaft body, extending the service life of the magnetic ring structure, having better use effects, and a wider application range.

[0006] According to some embodiments of the utility model, a plastic-coated fitting part is formed at the end of the magnet, and the plastic-coated fitting part is plastically coated and fitted with the plastic-coated body.

[0007] According to some embodiments of the utility model, the plastic-coated fitting part is configured as a fitting convex part protruding from the end face of the magnet, and at least part of the plastic-coated body is plastically coated outside the fitting convex part;

[0008] And / or, the plastic-coated fitting part is configured as a fitting concave part recessed in the end face of the magnet, and at least part of the plastic-coated body is plastically coated into the fitting concave part.

[0009] According to the magnetic ring structure of some embodiments of the present utility model, the mating convex portion is configured as an annular protrusion, and the annular protrusion is distributed around the first through hole;

[0010] And / or, the mating convex portion is formed with a mating hole, and the mating hole opens towards the inner side and / or the outer side of the mating convex portion.

[0011] According to the magnetic ring structure of some embodiments of the present utility model, there are a plurality of the mating holes, and the plurality of mating holes are spaced apart in the circumferential direction of the mating convex portion.

[0012] According to the magnetic ring structure of some embodiments of the present utility model, the plastic-coated body includes a plastic-coated section and a tapered section. The plastic-coated section is plastic-coated and mated with the plastic-coated mating portion. The tapered section is connected to one end of the plastic-coated section away from the magnet, and the outer diameter of the tapered section is configured to gradually decrease in a direction away from the plastic-coated section.

[0013] According to the magnetic ring structure of some embodiments of the present utility model, the outer diameter of the plastic-coated section is the same as the outer diameter of the magnet;

[0014] And / or, the outer diameters of the plastic-coated section and the magnet are both greater than the outer diameter of the tapered section.

[0015] According to the magnetic ring structure of some embodiments of the present utility model,

[0016] The second through hole is configured as a circular hole;

[0017] Or, the second through hole is configured as a polygonal hole;

[0018] Or, the inner peripheral wall of the second through hole includes a plurality of arc segments connected in sequence in the circumferential direction, and the centers of the arc segments are located within the second through hole;

[0019] Or, the inner peripheral wall of the second through hole includes a plurality of arc segments distributed in sequence in the circumferential direction, and an interval groove is formed between adjacent two of the arc segments;

[0020] Or, the inner peripheral wall of the second through hole is formed with a plurality of protrusion portions distributed in sequence in the circumferential direction.

[0021] According to the magnetic ring structure of some embodiments of the present utility model, the first through hole includes a first hole segment, a second hole segment, and a third hole segment that are distributed in sequence along the axial direction. The first hole segment, the second hole segment, and the third hole segment are distributed in sequence in a direction close to the plastic-coated body;

[0022] Wherein, the inner diameters of the first hole segment, the second hole segment, and the third hole segment decrease in sequence, and the inner diameter of the second hole segment is configured to gradually decrease from the end connected to the first hole segment to the end connected to the third hole segment.

[0023] The present utility model also provides a motor.

[0024] The motor according to an embodiment of the present utility model includes a motor shaft and the magnetic ring structure described in any one of the above, and the motor shaft is configured as the shaft body.

[0025] The present utility model also provides a vehicle.

[0026] The vehicle according to an embodiment of the present utility model includes the motor described above.

[0027] The motor, the vehicle and the above magnetic ring structure have the same advantages as compared with the prior art, which will not be elaborated herein.

[0028] The additional aspects and advantages of the present utility model will be partly given in the following description, partly become apparent from the following description, or be understood through the practice of the present utility model. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The above and / or additional aspects and advantages of the present utility model will become apparent and be readily understood from the description of the embodiments in conjunction with the following drawings, wherein:

[0030] Figure 1 is a cross-sectional view of the shaft body and the magnetic ring structure according to an embodiment of the present utility model;

[0031] Figure 2 is a cross-sectional view of the magnetic ring structure according to an embodiment of the present utility model Figure 1 ;

[0032] Figure 3 is a structural schematic diagram of the magnet according to an embodiment of the present utility model;

[0033] Figure 4 is a structural schematic diagram of the plastic-coated body according to an embodiment of the present utility model Figure 1 ;

[0034] Figure 5 is a structural schematic diagram of the magnetic ring structure according to an embodiment of the present utility model;

[0035] Figure 6 is a cross-sectional view of the magnetic ring structure according to an embodiment of the present utility model Figure 2 ;

[0036] Figure 7 is a structural schematic diagram of the plastic-coated body according to an embodiment of the present utility model Figure 2 ;

[0037] Figure 8 is a structural schematic diagram of the plastic-coated body according to an embodiment of the present utility model Figure 3 ;

[0038] Figure 9 Structural schematic diagram of the plastic-coated body according to an embodiment of the present invention Figure 4 ;

[0039] Figure 10 Structural schematic diagram of the plastic-coated body according to an embodiment of the present invention Figure 5 ;

[0040] Figure 11 Structural schematic diagram of the plastic-coated body according to an embodiment of the present invention Figure 6 .

[0041] Reference numerals:

[0042] Shaft body 100, magnetic ring structure 101,

[0043] Magnet 1, first through hole 11, first hole section 111, second hole section 112, third hole section 113, plastic-coated mating part 12, mating hole 121,

[0044] Plastic-coated body 2, plastic-coated section 21, tapered section 22, second through hole 23, arc section 231, spaced groove 232, protrusion 233. Detailed implementation manners

[0045] The embodiments of the present invention will be described in detail below. Examples of the embodiments are shown in the drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary only for explaining the present invention and should not be construed as limiting the present invention.

[0046] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for facilitating the description of the present invention 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 limiting the present invention. In addition, features defined as "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise specified, the meaning of "a plurality" is two or more.

[0047] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", and "coupling" 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 a direct connection or an indirect connection through an intermediate medium, and it can be the communication inside two components. 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 situations.

[0048] Unless otherwise specified, the front-back direction in this application is the longitudinal direction of the vehicle, i.e., the X direction; the left-right direction is the transverse direction of the vehicle, i.e., the Y direction; and the up-down direction is the vertical direction of the vehicle, i.e., the Z direction.

[0049] The following refers to Figures 1 - 11 Describe the magnetic ring structure 101 according to an embodiment of the present utility model. The structure is simple, the setting flexibility is high, it can avoid situations such as cracking of the magnet 1, extend the service life of the magnetic ring structure 101, and can reduce the manufacturing cost.

[0050] As Figures 1 - 11 As shown, the magnetic ring structure 101 according to an embodiment of the present utility model includes: a magnet 1 and a plastic coating body 2.

[0051] The magnet 1 is formed with a first through hole 11. The plastic coating body 2 is connected to the magnet 1 and is distributed along the axial direction. The plastic coating body 2 is formed with a second through hole 23 that is axially communicated with the first through hole 11. The inner diameter of the second through hole 23 is smaller than the inner diameter of the first through hole 11. Among them, both the first through hole 11 and the second through hole 23 are used for passing through the shaft body 100, and the inner wall of the first through hole 11 is adapted to have a clearance fit with the outer peripheral wall of the shaft body 100.

[0052] Among them, the magnetic ring structure 101 is arranged in the motor. The motor, also known as the motor, is an electromagnetic device that realizes the conversion or transmission of electrical energy based on the law of electromagnetic induction. The motor includes a motor and a generator. The motor is a device that converts electrical energy into mechanical energy, and the generator is a device that converts mechanical energy into electrical energy. Both the motor and the generator need to use the law of electromagnetic induction during operation. The motor has advantages such as high reliability and low mechanical noise, and is widely used in high-end tape recorders, video recorders, electronic instruments, and automated office equipment.

[0053] Specifically, the magnetic ring structure 101 is arranged as a ring structure, which can be sleeved outside the shaft body 100. And the magnetic ring structure 101 is provided with a magnet 1. The magnet 1 is formed with a first through hole 11. The magnet 1 can be arranged as a disc-shaped structure. The first through hole 11 is arranged as a through hole and extends along the axial direction of the magnet 1, so that the magnet 1 can be sleeved outside the shaft body 100 through the first through hole 11. And the magnetic ring structure 101 is also provided with a plastic-coated body 2. The plastic-coated body 2 can be made of plastic or other plastic / elastic materials, with low manufacturing cost and light weight, which can improve the lightweight design. The plastic-coated body 2 can be connected to the magnet 1 through hot processing technology, and thus can be applicable to magnets 1 of different shapes, with simple structure and high setting flexibility. And the plastic-coated body 2 and the magnet 1 are distributed axially, that is, the plastic-coated body 2 can buffer and shock-absorb the magnet 1 axially, etc., to ensure the operation reliability of the magnet 1. The plastic-coated body 2 is provided with a second through hole 23, and the second through hole 23 is also arranged as a through hole extending along the axial direction, and the second through hole 23 and the first through hole 11 can be axially communicated, so that the magnetic ring structure 101 has a through hole extending along the axial direction, so that the magnetic ring structure 101 can be sleeved on the shaft body 100.

[0054] Furthermore, both the first through hole 11 and the second through hole 23 are used for passing through the shaft body 100, and the inner diameter of the second through hole 23 is set to be smaller than the inner diameter of the first through hole 11. When the inner diameter of the second through hole 23 is the same as the outer diameter of the shaft body 100, the inner diameter of the first through hole 11 is set to be larger than the outer diameter of the shaft body 100, which can ensure that the shaft body 100 passes through the first through hole 11 and the second through hole 23, and the inner wall of the first through hole 11 can be in clearance fit with the outer peripheral wall of the shaft body 100, that is, the magnet 1 and the shaft body 100 are in clearance fit. This can avoid the situation that the magnet 1 cracks due to the force of the shaft body 100 expanding outwards when the magnet 1 is installed on the shaft body 100, and thus can extend the service life of the magnetic ring structure 101. And the clearance fit has lower requirements for the dimensional accuracy during the manufacture of the magnet 1, which can reduce the manufacturing cost.

[0055] The magnetic ring structure 101 according to the embodiment of the present invention has a simple structure, is convenient for assembly, and the plastic-coated body 2 can be applicable to different magnets 1, which can improve the setting flexibility, reduce the manufacturing cost, and the magnet 1 and the shaft body 100 are in clearance fit. Therefore, the situation that the magnet 1 cracks when installed on the shaft body 100 can be avoided, the service life of the magnetic ring structure 101 can be extended, the use effect is better, and the applicable range is wider.

[0056] In some embodiments, a plastic-coated mating portion 12 is formed at the end of the magnet 1, and the plastic-coated mating portion 12 is in plastic-coated mating with the plastic-coated body 2.

[0057] Specifically, the magnet 1 and the plastic-coated body 2 are connected by plastic coating and are distributed along the axial direction, so that the plastic-coated body 2 can buffer and shock the magnet 1, thereby ensuring the operational reliability of the magnetic ring structure 101, and a plastic-coated fitting portion 12 is formed at the end of the magnet 1, and the plastic-coated fitting portion 12 is formed at one end of the magnet 1 close to the plastic-coated body 2, and the plastic-coated body 2 can be plastic-coated with the plastic-coated fitting portion 12, so that the plastic-coated body 2 can be connected to the end of one end of the magnet 1, and the magnet 1 and the plastic-coated body 2 are distributed along the axial direction, so that the magnet 1 and the plastic-coated body 2 have an axial push-out force after plastic coating, which can ensure the installation reliability of the magnetic ring structure 101 and the shaft 100.

[0058] Furthermore, after the overmolded body 2 is connected to the overmolded mating portion 12, the magnet 1 and the overmolded body 2 are relatively fixed, that is, the magnet 1 and the overmolded body 2 can be jointly sleeved on the outside of the shaft 100, the overmolded body 2 and the shaft 100 are interference fit, and the magnet 1 and the shaft 100 are clearance fit, the overmolded body 2 can ensure that the magnet 1 is fixed relative to the shaft 100, thereby ensuring that the gap between the inner wall of the first through hole 11 and the outer peripheral wall of the shaft 100 remains unchanged, and the magnet 1 and the shaft 100 can be coaxially arranged, thereby ensuring installation reliability and extending the service life of the magnetic ring structure 101.

[0059] In some embodiments, the overmolded mating portion 12 is constructed as a mating protrusion protruding from the end surface of the magnet 1, and at least a portion of the overmolded body 2 is overmolded outside the mating protrusion; and / or, the overmolded mating portion 12 is constructed as a mating recessed portion concave in the end surface of the magnet 1, and at least a portion of the overmolded body 2 is overmolded into the mating recessed portion.

[0060] Specifically, a plastic-coated matching portion 12 is formed at one end of the magnet 1 close to the plastic-coated body 2, and the plastic-coated body 2 can be plastic-coated with the plastic-coated matching portion 12, so that the plastic-coated body 2 can be connected to the end of one end of the magnet 1, and the plastic-coated matching portion 12 is constructed as a matching convex portion, and the matching convex portion is protruded from the end surface of the magnet 1 toward the plastic-coated body 2, and at least a portion of the plastic-coated body 2 is plastic-coated outside the matching convex portion, the matching convex portion can be set as an annular convexity, and can also be set as a block convexity, etc., and the radial dimension of the matching convex portion is set to be smaller than the radial dimension of the magnet 1, at least a portion of the plastic-coated body 2 is plastic-coated outside the matching convex portion, so that the plastic-coated body 2 can be connected to the matching convex portion through plastic-coating, and then the plastic-coated body 2 can be connected to the magnet 1, thereby ensuring the connection reliability, and ensuring that the magnet 1 has an axial push-out force, and after the plastic-coated body 2 is plastic-coated with the matching convex portion, the end of the plastic-coated body 2 can be connected to the end of the magnet 1, thereby ensuring the buffering and shock-absorbing effect of the plastic-coated body 2 on the magnet 1 along the axial direction.

[0061] Further, a plastic coating mating portion 12 is formed at one end of the magnet 1 close to the plastic coating body 2. The plastic coating body 2 can be plastically mated with the plastic coating mating portion 12, so that the plastic coating body 2 can be connected to one end of the magnet 1. And the plastic coating mating portion 12 is configured as a mating recess, and the mating recess is recessed inward on the end face of the magnet 1 close to the plastic coating body 2. At least part of the plastic coating body 2 is plastically coated into the mating recess. The mating recess can be set as an annular groove, or can be set as a plurality of block-shaped grooves spaced along the end face, etc. At least part of the plastic coating body 2 is plastically coated into the mating recess, so that the plastic coating body 2 can be plastically connected to the mating recess, and further the plastic coating body 2 can be connected to the magnet 1, ensuring the connection reliability, and ensuring that the magnet 1 has an axial pushing force. And after the plastic coating body 2 is plastically mated with the mating recess, the end of the plastic coating body 2 can be connected to the end of the magnet 1, and further the buffering and shock-absorbing effects of the plastic coating body 2 on the magnet 1 in the axial direction can be ensured.

[0062] In some embodiments, the mating convex portion is configured as an annular protrusion, and the annular protrusion is distributed around the first through hole 11; and / or, the mating convex portion is formed with a mating hole 121, and the mating hole 121 opens toward the inside and / or outside of the mating convex portion.

[0063] Specifically, a mating convex portion is provided at the end of the magnet 1 close to the plastic coating body 2, and at least part of the plastic coating body 2 is plastically coated outside the mating convex portion, so that the plastic coating body 2 can be connected to the magnet 1, and as Figure 3 shown, the mating convex portion can be configured as an annular protrusion, the annular protrusion is coaxially arranged with the main body of the magnet 1, and protrudes toward the plastic coating body 2 at the end of the magnet 1 close to the plastic coating body 2. The annular protrusion is distributed around the first through hole 11, that is, when the magnet 1 is sleeved on the shaft body 100, the annular protrusion can be arranged around the shaft body 100, and the plastic coating body 2 is plastically coated with the annular protrusion, so that part of the plastic coating body 2 is also distributed around the first through hole 11, and further the acting force can be distributed in the circumferential direction to ensure the connection reliability between the plastic coating body 2 and the magnet 1.

[0064] Further, the mating convex portion protrudes toward the plastic coating body 2, and as Figure 3 shown, the mating convex portion can also be provided with a mating hole 121. The mating hole 121 can be arranged at the connection between the mating convex portion and the end face of the magnet 1, and the mating hole 121 can be set as a semi-circular hole, a rectangular hole, etc. The mating hole 121 opens toward the inside and / or outside of the mating convex portion, that is, the mating hole 121 can only open toward the inside of the mating convex portion, the mating hole 121 can also only open toward the outside of the mating convex portion, and the mating hole 121 can also open toward the inside and outside of the mating convex portion at the same time. When the plastic coating body 2 is plastically coated on the mating convex portion, part of the plastic coating body 2 can be placed in the mating hole 121, so that the magnet 1 has a radial torque while having an axial thrust, ensuring the installation reliability of the magnet 1 and the operation reliability of the magnet 1.

[0065] In some embodiments, there are a plurality of mating holes 121 , and the plurality of mating holes 121 are spaced apart and distributed in the circumferential direction of the mating protrusion.

[0066] Specifically, the convex portion is arranged to protrude toward the plastic package 2, and as Figure 3 As shown, the mating protrusion may also be provided with a mating hole 121, and the mating hole 121 is open toward the inner side and / or the outer side of the mating protrusion. When the overmolded body 2 is overmolded on the mating protrusion, part of the overmolded body 2 can be placed in the mating hole 121, so that the magnet 1 has both axial thrust and radial torque, and a plurality of mating holes 121 are provided, and the plurality of mating holes 121 are spaced apart and distributed in the circumferential direction of the mating protrusion, and the intervals can be set to be equal, and the plurality of mating holes 121 can be set to be the same or different. In the present embodiment, the plurality of mating holes 121 are all set to be the same, so that the overmolded body 2 placed in the mating hole 121 is also the same, so that the forces on the circumferential connection between the overmolded body 2 and the magnet 1 are the same, thereby avoiding breakage caused by uneven force and extending the service life.

[0067] In some embodiments, the overmolded body 2 includes an overmolded section 21 and a conical section 22. The overmolded section 21 is overmolded with the overmolded mating portion 12. The conical section 22 is connected to one end of the overmolded section 21 that is away from the magnet 1. The outer diameter of the conical section 22 is constructed to gradually decrease in a direction away from the overmolded section 21.

[0068] Specifically, the magnet 1 is provided with a plastic-coated matching portion 12, and at least a portion of the plastic-coated body 2 is plastic-coated with the plastic-coated matching portion 12, and as Figure 2 As shown, the overmolded body 2 is provided with an overmolded section 21 and a conical section 22. The overmolded section 21 is the part where the overmolded body 2 is overmolded with the overmolded matching portion 12, and when the overmolded matching portion 12 is set to a matching convex portion, the length of the overmolded section 21 along the axial direction is set to be greater than the protruding length of the matching convex portion, so that the matching convex portion can be completely covered to ensure the reliability of the overmolding. The conical section 22 is connected to the overmolded section 21 and is located at the end of the overmolded section 21 away from the magnet 1. The conical section 22 is set to a cone, and in actual use, it can be set to a cylinder, a hemisphere, etc. according to the use requirements to improve the setting flexibility. In this embodiment, the outer diameter of the conical section 22 is constructed to gradually decrease in the direction away from the overmolded section 21, that is, the outer diameter dimension of the connection between the conical section 22 and the overmolded section 21 is set to the maximum, and the outer diameter dimension of the end of the conical section 22 away from the overmolded section 21 is set to the minimum, so that it can facilitate the automated production of the magnetic ring structure 101 and improve production efficiency.

[0069] In some embodiments, the outer diameter of the overmolded section 21 is the same as the outer diameter of the magnet 1 ; and / or, the outer diameter of the overmolded section 21 and the outer diameter of the magnet 1 are both greater than the outer diameter of the conical section 22 .

[0070] Specifically, Figure 2As shown, the plastic-coated body 2 is provided with a plastic-coated section 21 and a tapered section 22. The plastic-coated section 21 is arranged close to the magnet 1 and is in plastic-coated cooperation with the plastic-coated mating part 12 of the magnet 1. The outer diameter of the plastic-coated section 21 is set to be the same as the outer diameter of the magnet 1. When the plastic-coated section 21 is connected to the magnet 1, the outer peripheral wall of the plastic-coated section 21 and the outer peripheral wall of the magnet 1 are on the same arc surface. Thus, the plastic-coated section 21 and the magnet 1 form a complete cylinder, improving the integrity of the magnetic ring structure 101 and facilitating the cooperation of the magnetic ring structure 101 with other components after being installed on the shaft body 100. Moreover, the outer diameter of the plastic-coated section 21 and the outer diameter of the magnet 1 can both be set to be larger than the outer diameter of the tapered section 22, that is, the main body of the magnetic ring structure 101 can be set as a cylinder with a tapered end, which is convenient for the automated production of the magnetic ring structure 101 and improves production efficiency.

[0071] In some embodiments, the second through hole 23 is configured as a circular hole; or, the second through hole 23 is configured as a polygonal hole; or, the inner peripheral wall of the second through hole 23 includes a plurality of arc segments 231 connected in sequence along the circumferential direction, and the centers of the arc segments 231 are located within the second through hole 23; or, the inner peripheral wall of the second through hole 23 includes a plurality of arc segments 231 distributed in sequence along the circumferential direction, and an interval groove 232 is formed between adjacent two arc segments 231; or, a plurality of convex portions 233 are formed on the inner peripheral wall of the second through hole 23.

[0072] Specifically, the plastic-coated body 2 is provided with a second through hole 23, and the shaft body 100 is inserted into the second through hole 23 and is in interference fit with the second through hole 23. As Figure 7 shown, the second through hole 23 can be set as a circular hole, and ribs can be provided on the outer peripheral wall of the shaft body 100. Thus, through the cooperation of the second through hole 23 and the ribs, situations such as bursting caused by excessive extrusion between the plastic-coated body 2 and the shaft body 100 can be prevented, and the service life can be extended.

[0073] Furthermore, as Figure 8 shown, the second through hole 23 can be set as a polygonal hole, and the number of sides is set to be greater than or equal to three, that is, it can be set as a triangular hole, a quadrilateral hole, a pentagonal hole, etc., so that there is a gap between the shaft body 100 and the second through hole 23, avoiding problems such as excessive extrusion and extending the service life.

[0074] And as Figures 9 - 11As shown, the inner peripheral wall of the second through hole 23 may also be provided with a plurality of arc segments 231. The plurality of arc segments 231 are connected in sequence, and the centers of the arc segments 231 are located within the second through hole 23. In addition, the inner peripheral wall of the second through hole 23 may also include a plurality of arc segments 231 distributed in sequence along the circumferential direction. An interval groove 232 is formed between two adjacent arc segments 231. Moreover, the inner peripheral wall of the second through hole 23 may also be formed with a plurality of convex portions 233 distributed in sequence along the circumferential direction. Thus, there can be a gap between the shaft body 100 and the second through hole 23, avoiding problems such as excessive extrusion, prolonging the service life. And in actual use, the second through hole 23 with other shapes can also be set as long as there is a gap between the second through hole 23 and the shaft body 100.

[0075] In some embodiments, the first through hole 11 includes a first hole segment 111, a second hole segment 112, and a third hole segment 113 that are distributed in sequence along the axial direction. The first hole segment 111, the second hole segment 112, and the third hole segment 113 are distributed in sequence along the direction close to the plastic coating body 2. Among them, the inner diameters of the first hole segment 111, the second hole segment 112, and the third hole segment 113 decrease in sequence. The inner diameter of the second hole segment 112 is configured to gradually decrease from the end connected to the first hole segment 111 to the end connected to the third hole segment 113.

[0076] Specifically, the magnet 1 is provided with a first through hole 11. The shaft body 100 can be inserted into the first through hole 11, and the inner wall of the first through hole 11 and the outer peripheral wall of the shaft body 100 are in clearance fit. Thus, it can avoid situations such as the magnet 1 breaking, prolonging the service life of the magnet 1. And as Figure 2 and Figure 6 shown, the first through hole 11 is provided with a first hole segment 111, a second hole segment 112, and a third hole segment 113 that are connected and communicate with each other. The first hole segment 111, the second hole segment 112, and the third hole segment 113 are distributed in sequence along the axial direction. The first hole segment 111 is set to be the farthest from the plastic coating body 2, and the third hole segment 113 is set to be the closest to the plastic coating body 2. That is, the first hole segment 111, the second hole segment 112, and the third hole segment 113 are distributed in sequence along the direction close to the plastic coating body 2, so that the second through hole 23 is connected and communicates with the third hole segment 113.

[0077] Further, the inner diameters of the first hole section 111, the second hole section 112, and the third hole section 113 decrease in sequence, that is, the inner diameter of the first hole section 111 is set to be the largest, and the inner diameter of the third hole section 113 is set to be the smallest. The magnet 1 and the shaft body 100 are in clearance fit, that is, the inner diameter of the first through hole 11 is set to be larger than the radial dimension of the shaft body 100, and the inner diameter of the third hole section 113 is set to be the smallest, such that the inner diameter of the third hole section 113 needs to be set to be larger than the radial dimension of the shaft body 100, thereby ensuring the clearance fit between the magnet 1 and the shaft body 100. Moreover, the inner diameter of the second hole section 112 is configured to gradually decrease from the end connected to the first hole section 111 to the end connected to the third hole section 113, that is, the inner wall of the second hole section 112 is inclined. The largest inner diameter of the first hole section 111 facilitates the shaft body 100 to be inserted into the magnet 1, and the second hole section 112 can guide the shaft body 100, facilitating the shaft body 100 to enter the third hole section 113, which is conducive to the assembly of the shaft body 100 and the magnet 1 and improves the assembly efficiency.

[0078] The present utility model further provides a motor.

[0079] The motor according to an embodiment of the present utility model includes a motor shaft and the magnetic ring structure 101 as described in any one of the above. The motor shaft is configured as the shaft body 100, that is, the magnetic ring structure 101 can be sleeved outside the motor shaft. The plastic-coated body 2 of the magnetic ring structure 101 and the motor shaft are in interference fit. The magnet 1 and the plastic-coated body 2 are axially connected, and the magnet 1 and the motor shaft are in clearance fit, thereby avoiding situations such as the magnet 1 being fractured under force and extending the service life of the magnetic ring structure 101.

[0080] The motor according to an embodiment of the present utility model is provided with a magnetic ring structure 101. The magnetic ring structure 101 has a simple structure, is convenient for assembly, and the plastic-coated body 2 can be applicable to different magnets 1, which can improve the setting flexibility, reduce the manufacturing cost, and the magnet 1 and the shaft body 100 are in clearance fit, thereby avoiding situations such as cracking when the magnet 1 is installed on the shaft body 100, extending the service life of the magnetic ring structure 101, having better use effects, and a wider application range.

[0081] The present utility model further provides a vehicle.

[0082] The vehicle according to an embodiment of the present utility model includes the above-mentioned motor.

[0083] The vehicle according to an embodiment of the present utility model is provided with a motor, and the motor is provided with a magnetic ring structure 101. The magnetic ring structure 101 has a simple structure, is convenient for assembly, and the plastic-coated body 2 can be applicable to different magnets 1, which can improve the setting flexibility, reduce the manufacturing cost, and the magnet 1 and the shaft body 100 are in clearance fit, thereby avoiding situations such as cracking when the magnet 1 is installed on the shaft body 100, extending the service life of the magnetic ring structure 101, having better use effects, and a wider application range.

[0084] In the description of this specification, the descriptions referring to terms such as "one embodiment", "some embodiments", "schematic embodiments", "examples", "specific examples", or "some examples", etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0085] Although the embodiments of the present utility model have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present utility model, and the scope of the present utility model is defined by the claims and their equivalents.

Claims

1. A magnetic ring structure, characterized in that: include: A magnet, wherein the magnet is formed with a first penetration hole; A plastic-encapsulated body, the plastic-encapsulated body is connected to the magnet and is distributed along the axial direction, the plastic-encapsulated body is formed with a second through-hole connected to the first through-hole along the axial direction, and the inner diameter of the second through-hole is smaller than the inner diameter of the first through-hole; The first penetration hole and the second penetration hole are both used for penetrating the shaft body, and the inner wall of the first penetration hole is suitable for gap fitting with the outer peripheral wall of the shaft body.

2. The magnetic ring structure according to claim 1, characterized in that: An overmolding matching portion is formed at the end of the magnet, and the overmolding matching portion is overmolded with the overmolding body.

3. The magnetic ring structure according to claim 2, characterized in that: The overmolded matching portion is configured as a matching convex portion protruding from the end surface of the magnet, and at least a portion of the overmolded body is overmolded outside the matching convex portion; And / or, the overmolded matching portion is configured as a matching recessed portion that is concave in the end surface of the magnet, and at least a portion of the overmolded body is overmolded into the matching recessed portion.

4. The magnetic ring structure according to claim 3, characterized in that: The matching protrusion is configured as an annular protrusion, and the annular protrusion is distributed around the first penetration hole; And / or, the mating protrusion is formed with a mating hole, and the mating hole is open toward the inner side and / or the outer side of the mating protrusion.

5. The magnetic ring structure according to claim 4, characterized in that: There are a plurality of the matching holes, and the matching holes are spaced apart and distributed in the circumferential direction of the matching protrusion.

6. The magnetic ring structure according to claim 2, characterized in that: The overmolded body includes an overmolded section and a tapered section. The overmolded section is overmolded with the overmolded mating portion. The tapered section is connected to one end of the overmolded section away from the magnet. The outer diameter of the tapered section is configured to gradually decrease in a direction away from the overmolded section.

7. The magnetic ring structure according to claim 6, characterized in that: The outer diameter of the overmolded section is the same as the outer diameter of the magnet; And / or, the outer diameter of the overmolded section and the outer diameter of the magnet are both larger than the outer diameter of the conical section.

8. The magnetic ring structure according to any one of claims 1 to 7, characterized in that: The second penetration hole is configured as a circular hole; Or, the second through hole is configured as a polygonal hole; Or, the inner peripheral wall of the second penetration hole includes a plurality of arc segments connected in sequence along the circumferential direction, and the center of the arc segment is located in the second penetration hole; Or, the inner peripheral wall of the second perforated hole includes a plurality of arc segments distributed in sequence along the circumferential direction, and a spacing groove is formed between two adjacent arc segments; Alternatively, the inner peripheral wall of the second penetration hole is formed with a plurality of protrusions distributed sequentially along the circumferential direction.

9. The magnetic ring structure according to any one of claims 1 to 7, characterized in that: The first through hole comprises a first hole segment, a second hole segment and a third hole segment which are sequentially distributed along the axial direction, and the first hole segment, the second hole segment and the third hole segment are sequentially distributed along a direction close to the plastic-encapsulating body; The inner diameters of the first hole segment, the second hole segment and the third hole segment decrease in sequence, and the inner diameter of the second hole segment is configured to gradually decrease from an end connected to the first hole segment to an end connected to the third hole segment.

10. A motor, characterized in that: The invention comprises a motor shaft and the magnetic ring structure according to any one of claims 1 to 9, wherein the motor shaft is configured as the shaft body.

11. A vehicle, characterized in that: The motor comprising the motor described in claim 10.

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