Motor

Abstract

The motor comprises a housing, a stator assembly and a rotor assembly, the housing is provided with a through cavity, the stator assembly comprises an iron core and a plurality of stator teeth, the middle part of the iron core is provided with a through hole, the stator teeth are respectively arranged on the inner side wall of the through hole, a stator slot is formed between two adjacent stator teeth, each stator slot is provided with a communication port, and the communication port is communicated with the through cavity. The rotor assembly comprises a rotating shaft and a magnetic ring, the rotating shaft is rotatably arranged in the through cavity, and the magnetic ring is provided with a mounting hole and is accommodated in the through hole. The stator groove is provided with the communication port communicated with the through hole of the iron core, so that heat circulation in the motor is realized, heat generated when the winding and the magnetic ring work can rapidly flow in the stator groove, the communication port and the through hole which are communicated with each other and rapidly diffuse to the external environment through the shell, the heat dissipation effect is good, the heat dissipation performance of the motor is improved, the reliability is good, and the service life of the motor is prolonged. And the service life of the motor is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of drive equipment, in particular to a motor. Background Art

[0002] Motors are commonly used driving components in daily and industrial production. They can provide rotational driving force. There are many types and sizes of motors to meet people's different usage needs. Among them, motors with an outer diameter of less than 20mm are micro motors, which can be used to drive model cars. Model cars are becoming more and more popular as people's entertainment tools. Therefore, the application of micro motors is becoming more and more extensive, bringing convenience to people's lives.

[0003] However, due to the small structure and size of the micromotor, the structure of each component of the micromotor is compact, thus ensuring the compactness of the overall structure of the motor. However, the heat generated by the existing micromotor under high-speed operation is not easy to be discharged in the compact structure of each component, which can easily cause damage to the motor, poor reliability, and affect the service life of the motor. Therefore, it is necessary to provide a motor with good heat dissipation performance and good reliability. Utility Model Content

[0004] Based on this, it is necessary to provide a motor.

[0005] The utility model solves the above technical problems with the following technical solutions: a motor comprising:

[0006] A shell, wherein the shell is provided with a through cavity, and the through cavity is arranged through the first end and the second end of the shell;

[0007] A stator assembly, the stator assembly comprising an iron core and a plurality of stator teeth, the iron core being connected to the inner side wall of the through cavity, a through hole being opened in the middle of the iron core, each of the stator teeth being respectively arranged on the inner side wall of the through hole, each of the stator teeth being arranged at intervals from each other, a stator slot being formed between two adjacent stator teeth, each of the stator slots having a communication port, and each of the stator slots being respectively connected to the through hole through the communication ports; and

[0008] The rotor assembly comprises a rotating shaft and a magnetic ring, wherein the rotating shaft is rotatably arranged in the through cavity, the magnetic ring is provided with a mounting hole, the magnetic ring is sleeved on the rotating shaft through the mounting hole, the magnetic ring is accommodated in the through hole, and the magnetic ring and each of the stator teeth are spaced apart from each other.

[0009] In one embodiment, it further includes a first end cover and a second end cover, wherein the first end cover is detachably connected to the first end of the shell, and the second end cover is detachably connected to the second end of the shell, and the first end cover and the second end cover are used to movably close the through cavity.

[0010] In one embodiment, a first bearing is disposed at the first end of the rotating shaft, and a second bearing is disposed at the second end of the rotating shaft. The first bearing and the second bearing are connected to the first end cover and the second end cover respectively.

[0011] In one embodiment, it further comprises a plurality of windings, each of the windings being wound around each of the stator teeth respectively.

[0012] In one embodiment, each of the windings is wound around at least two of the stator teeth.

[0013] In one embodiment, the outer side wall of the shell is provided with a plurality of heat dissipation stripe grooves, and the heat dissipation stripe grooves are arranged at intervals from each other.

[0014] In one embodiment, a spiral groove is formed on the outer side wall of the rotating shaft, a glue layer is provided on the inner side wall of the spiral groove, and the inner side wall of the mounting hole is connected to the inner side wall of the spiral groove through the glue layer.

[0015] In one embodiment, the rotating shaft is provided with a step portion, and the cross section of the step portion is rectangular.

[0016] In one embodiment, a slot is formed on the outer side wall of the core, and a clamping strip is disposed on the inner side wall of the through cavity, and the clamping strip is disposed in the slot.

[0017] In one embodiment, an outer surface of the core is provided with an insulating coating.

[0018] Compared with the prior art, the utility model has at least the following advantages:

[0019] The utility model can play a supporting and installing role by being provided with a hollow shell structure. The iron core is fixedly installed in the through cavity of the shell. The iron core is a hollow structure. The rotating shaft is rotatably installed in the through cavity, so that the magnetic ring is rotatably installed in the through hole of the iron core. The magnetic ring is an annular magnetic structure formed by two magnets with different polarities, which can generate a magnetic field. The structure is simple and can ensure the compactness of the overall structure of the motor. In addition, the stator teeth and the iron core are integrally formed and arranged, and a certain gap is left between two adjacent stator teeth to form a stator slot. The external conductive coil can be wound on the stator teeth to form a winding and accommodated in the stator slot. The stator slot is provided with a connecting port connected to the through hole of the iron core, so that the heat flow inside the motor can be realized. The heat generated by the winding and the magnetic ring when working can quickly flow in the stator slots, the connecting port and the through hole that are connected to each other, and quickly diffuse to the external environment through the shell. The heat dissipation effect is good, which greatly improves the heat dissipation performance of the motor, has good reliability, and is conducive to improving the service life of the motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a schematic structural diagram of a motor according to an embodiment;

[0021] Figure 2 A schematic diagram of a three-dimensional exploded structure of a motor according to an embodiment;

[0022] Figure 3 A schematic cross-sectional view of a stator assembly and a rotor assembly of a motor according to an embodiment;

[0023] Figure 4 A schematic structural diagram of a rotor assembly of a motor according to an embodiment;

[0024] Figure 5 The figure is a schematic cross-sectional structural diagram of a rotor assembly of a motor according to an embodiment. DETAILED DESCRIPTION

[0025] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present invention can be combined with each other. The technical solution of the present invention will be further described below in conjunction with the drawings of the embodiments of the present invention, and the present invention is not limited to the following specific implementation methods.

[0026] It should be understood that the same or similar numbers in the drawings of the embodiments correspond to the same or similar parts. In the description of the present utility model, it should be understood that if there are terms such as "upper", "lower", "front", "back", "left", "right", "top", "bottom" and the like indicating the orientation or positional relationship, they are based on the orientation or positional relationship shown in the drawings, which 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. Therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and cannot be understood as a limitation on this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0027] See also Figure 1 , Figure 2 , Figure 3 and Figure 4In one embodiment, a motor 10 is provided, comprising a housing 100, a stator assembly 200 and a rotor assembly 300. The housing 100 is provided with a through cavity 110, and the through cavity 110 is provided through the first end and the second end of the housing 100. The stator assembly 200 comprises an iron core 210 and a plurality of stator teeth 220, wherein the iron core 210 is connected to the inner side wall of the through cavity 110, a through hole 211 is provided in the middle of the iron core 210, and each of the stator teeth 220 is respectively provided on the inner side wall of the through hole 211, and each of the stator teeth 220 is arranged at intervals from each other, and a stator slot 221 is formed between two adjacent stator teeth 220, and each of the stator slots 221 has a communication port 221a, and each of the stator slots 221 is respectively connected to the through hole 211 through each of the communication ports 221a. The rotor assembly 300 includes a rotating shaft 310 and a magnetic ring 320. The rotating shaft 310 is rotatably disposed in the through cavity 110. The magnetic ring 320 is provided with a mounting hole. The magnetic ring 320 is sleeved on the rotating shaft 310 through the mounting hole. The magnetic ring 320 is accommodated in the through hole 211, and the magnetic ring 320 and each of the stator teeth 220 are spaced apart from each other.

[0028] It should be noted that the housing 100 is a hollow circular shell structure having a through cavity 110 in the middle, the iron core 210 is a circular ring structure having a through hole 211, the diameter of the outer circle of the iron core 210 is slightly larger than the diameter of the through cavity 110, the iron core 210 is installed in the through cavity 110, and the outer wall of the iron core 210 is interference fit with the inner wall of the through cavity 110, so that the iron core 210 is fixedly installed in the through cavity 110, each stator tooth 220 is integrally formed with the iron core 210, and each stator tooth 220 is radially arranged with the central axis of the iron core 210 as the center. In this way, it can be ensured that each stator tooth 220 is evenly distributed in the through hole 211, and a certain gap is left between two adjacent stator teeth 220, thereby forming a stator slot 221, and the stator slot 221 can be used to accommodate the winding 600, that is, the external coil is wound on the stator tooth 220 to form the winding 600, and the winding 600 is at least partially accommodated in the stator slot 221. After the winding 600 is energized, electromagnetic induction can be generated with the magnetic ring 320 on the shaft 310, thereby realizing the driving rotation of the shaft 310, thereby realizing the driving rotation of the motor.

[0029] Specifically, both ends of the rotating shaft 310 can be rotatably mounted on the inner wall of the through cavity 110 through bearings, so that the rotating shaft 310 can be rotatably mounted in the through cavity 110. The magnetic ring 320 is a hollow ring structure with a mounting hole. The magnetic ring 320 is composed of two magnets with different polarities, so that a certain magnetic field can be formed, and electromagnetic induction is generated in cooperation with the winding 600 to provide a driving force for the rotation of the rotating shaft 310. The magnetic ring 320 has a simple structure, which is conducive to improving the structural compactness of the motor. At the same time, the stator slot 221 is opened A connecting port 221a connected to the through hole 211 of the iron core 210 is provided. The connecting port 221a is respectively connected to the stator slot 221 and the through hole 211, so that heat circulation inside the motor can be realized. The heat generated by the winding 600 and the magnetic ring 320 during operation can flow quickly in the mutually connected stator slots 221, the connecting port 221a and the through hole 211, and quickly diffuse to the external environment through the housing 100, so that the heat dissipation effect is good, the heat dissipation performance of the motor is greatly improved, the reliability is good, and it is beneficial to increase the service life of the motor.

[0030] See also Figure 1 and Figure 2 In one embodiment, the first end cap 400 and the second end cap 500 are further included. The first end cap 400 is detachably connected to the first end of the housing 100, and the second end cap 500 is detachably connected to the second end of the housing 100. The first end cap 400 and the second end cap 500 are used to movably close the through cavity 110. It can be understood that by providing the first end cap 400 and the second end cap 500, the first end cap 400 and the second end cap 500 are both cover-shaped structures. The first end cap 400 and the second end cap 500 are provided with a thread structure that is interference-fitted with the housing 100, thereby realizing a detachable connection with the first end and the second end of the housing 100. The first end cap 400 and the second end cap 500 are used to movably close the through cavity 110 of the housing 100, so as to protect the various components inside the through cavity 110, which is beneficial to prevent dust and other dirt from polluting the inside of the motor, thereby improving the overall structural stability of the motor.

[0031] See also Figure 2 In one embodiment, the first end of the rotating shaft 310 is provided with a first bearing (not shown), and the second end of the rotating shaft 310 is provided with a second bearing 312, and the first bearing and the second bearing 312 are respectively connected to the first end cover 400 and the second end cover 500. It can be understood that in this embodiment, the first end and the second end of the rotating shaft 310 are respectively provided with a first bearing and a second bearing 312, and the first bearing and the second bearing 312 are respectively installed on the first end cover 400 and the second end cover 500, so that the rotating shaft 310 is rotatably installed in the through cavity 110. The bearing is a commonly used component for realizing a rotation connection, and the rotating shaft 310 can be stably rotated and installed in the through cavity 110, and the structural stability is good.

[0032] See also Figure 2 In one embodiment, it further includes a plurality of windings 600, each of which is wound on each of the stator teeth 220. It can be understood that by providing each winding 600, one winding 600 is formed by winding a plurality of coils on the stator teeth 220, so that each winding 600 can be formed on each of the stator teeth 220, and by passing current through the winding 600, electromagnetic induction can be generated with the magnetic ring 320, providing driving force for the rotation of the shaft 310, and realizing the rotation drive of the shaft 310 at the output end of the motor.

[0033] In one embodiment, each of the windings 600 is wound around at least two of the stator teeth 220 . It can be understood that in one winding 600, the winding 600 is at least wound on a stator tooth 220, that is, the winding 600 adopts a distributed winding 600, and the winding 600 is wound across multiple stator teeth 220. Specifically, in this embodiment, there are six stator teeth 220, and three windings 600 are provided. Two opposite stator teeth 220 are a pair, and one winding 600 is wound on two opposite stator teeth 220. In this way, three pairs of windings 600 that are symmetrical to each other can be formed, and each winding 600 can be wound across the stator teeth 220 at both ends of the iron core 210, so that the winding length of the winding 600 can be increased, which is beneficial to improve the current density, thereby facilitating the improvement of the power of the motor, and can improve the motor power while achieving a compact structure to meet higher motor power and speed requirements. The heat generated by the winding 600 located at the end portion of the iron core 210 can be quickly transferred to the external environment through the housing 100 for rapid heat dissipation, and the heat dissipation performance of the motor is good.

[0034] See also Figure 1 and Figure 2 In one embodiment, the outer wall of the housing 100 is provided with a plurality of heat dissipation stripe grooves 101, and the heat dissipation stripe grooves 101 are arranged at intervals from each other. It can be understood that by providing the heat dissipation stripe grooves 101 on the outer wall of the housing 100, the outer surface area of ​​the housing 100 can be greatly increased without increasing the size and volume of the overall structure of the motor, thereby greatly increasing the heat dissipation area of ​​the housing 100, which is beneficial to improving the heat dissipation inside the motor, and can further improve the heat dissipation performance of the motor.

[0035] See also Figure 4 and Figure 5In one embodiment, the outer wall of the rotating shaft 310 is provided with a spiral groove 313, the inner wall of the spiral groove 313 is provided with a glue layer, and the inner wall of the mounting hole is connected to the inner wall of the spiral groove 313 through the glue layer. It can be understood that the outer wall of the rotating shaft 310 can greatly increase the surface area of ​​the outer wall of the rotating shaft 310 by providing the spiral spiral groove 313, and then by providing the glue layer, the glue layer is used to bond the inner wall of the spiral groove 313 and the inner wall of the mounting hole, so that the magnetic ring 320 is bonded to the outer wall of the rotating shaft 310, and the bonding area is large, so that the magnetic ring 320 can be better fixed and installed on the rotating shaft 310, and the structural stability is good.

[0036] See also Figure 4 and Figure 5 In one embodiment, the rotating shaft 310 is provided with a step portion 314, and the cross section of the step portion 314 is rectangular. It can be understood that the end of the rotating shaft 310 away from the housing 100 is provided with a step portion 314, and the step portion 314 is set to be flat. The step portion 314 can be used as an output end connected to an external component, and the cross-sectional area of ​​the step portion 314 is smaller than the cross-sectional area of ​​the rotating shaft 310. In this way, the anti-torque performance of the shaft can be enhanced, and it is helpful to reduce the weight of the rotating shaft 310, so that the inertia of the rotating shaft 310 is smaller, which is helpful to improve the response speed of the motor and improve the overall performance of the motor.

[0037] See also Figure 2 and Figure 3 In one embodiment, the outer wall of the iron core 210 is provided with a slot 212, and the inner wall of the through cavity 110 is provided with a clip (not shown), and the clip is arranged in the slot 212. It can be understood that by providing the slot 212 and the clip structure, the iron core 210 can be positioned and installed in the through cavity 110, so as to achieve the positioning installation of the motor, which is conducive to improving the installation accuracy and efficiency of the motor. Specifically, in this embodiment, two slots 212 are provided, and correspondingly, two clips are also provided, so that the left and right can be engaged with each other to ensure the positioning installation of the iron core 210 with high installation accuracy.

[0038] In one embodiment, an insulating coating is provided on the outer surface of the core 210. It is understandable that the insulating coating can improve the insulation performance of the core 210 by providing the outer surface of the core 210. For example, the insulating coating is a resin insulating coating, which can have a good insulation effect and can avoid leakage when the winding 600 contacts the core 210, thereby improving the overall safety performance of the motor and improving the quality of the motor.

[0039] Compared with the prior art, the utility model has at least the following advantages:

[0040] The utility model can play a supporting and installing role by being provided with a hollow shell structure. The iron core is fixedly installed in the through cavity of the shell. The iron core is a hollow structure. The rotating shaft is rotatably installed in the through cavity, so that the magnetic ring is rotatably installed in the through hole of the iron core. The magnetic ring is an annular magnetic structure formed by two magnets with different polarities, which can generate a magnetic field. The structure is simple and can ensure the compactness of the overall structure of the motor. In addition, the stator teeth and the iron core are integrally formed and arranged, and a certain gap is left between two adjacent stator teeth to form a stator slot. The external conductive coil can be wound on the stator teeth to form a winding and accommodated in the stator slot. The stator slot is provided with a connecting port connected to the through hole of the iron core, so that the heat flow inside the motor can be realized. The heat generated by the winding and the magnetic ring when working can quickly flow in the stator slots, the connecting port and the through hole that are connected to each other, and quickly diffuse to the external environment through the shell. The heat dissipation effect is good, which greatly improves the heat dissipation performance of the motor, has good reliability, and is conducive to improving the service life of the motor.

[0041] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0042] The above-mentioned embodiments only express several implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. A motor, characterized in that: include: A shell, wherein the shell is provided with a through cavity, and the through cavity is arranged through the first end and the second end of the shell; A stator assembly, the stator assembly comprising an iron core and a plurality of stator teeth, the iron core being connected to the inner side wall of the through cavity, a through hole being opened in the middle of the iron core, each of the stator teeth being respectively arranged on the inner side wall of the through hole, each of the stator teeth being arranged at intervals from each other, a stator slot being formed between two adjacent stator teeth, each of the stator slots having a communication port, and each of the stator slots being respectively connected to the through hole through the communication ports; and The rotor assembly comprises a rotating shaft and a magnetic ring, wherein the rotating shaft is rotatably arranged in the through cavity, the magnetic ring is provided with a mounting hole, the magnetic ring is sleeved on the rotating shaft through the mounting hole, the magnetic ring is accommodated in the through hole, and the magnetic ring and each of the stator teeth are spaced apart from each other.

2. The motor according to claim 1, characterized in that It also includes a first end cover and a second end cover, wherein the first end cover is detachably connected to the first end of the shell, and the second end cover is detachably connected to the second end of the shell, and the first end cover and the second end cover are used to movably close the through cavity.

3. The motor according to claim 2, characterized in that A first bearing is disposed at the first end of the rotating shaft, and a second bearing is disposed at the second end of the rotating shaft. The first bearing and the second bearing are connected to the first end cover and the second end cover respectively.

4. The motor according to claim 1, characterized in that It also includes a plurality of windings, each of which is wound around each of the stator teeth.

5. The motor according to claim 4, characterized in that Each of the windings is wound around at least two of the stator teeth.

6. The motor according to claim 1, characterized in that The outer side wall of the shell is provided with a plurality of heat dissipation stripe grooves, and the heat dissipation stripe grooves are arranged at intervals from each other.

7. The motor according to claim 1, characterized in that The outer side wall of the rotating shaft is provided with a spiral groove, the inner side wall of the spiral groove is provided with a glue layer, and the inner side wall of the mounting hole is connected to the inner side wall of the spiral groove through the glue layer.

8. The motor according to any one of claims 1 to 7, characterized in that: The rotating shaft is provided with a step portion, and the cross section of the step portion is rectangular.

9. The motor according to any one of claims 1 to 7, characterized in that: The outer side wall of the iron core is provided with a clamping groove, the inner side wall of the through cavity is provided with a clamping strip, and the clamping strip is arranged in the clamping groove.

10. The electric machine according to any one of claims 1 to 7, characterized in that The outer surface of the iron core is provided with an insulating coating.

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