Motor stator and brushless motor
By using the positioning structure of the mounting column, Hall plate and iron core in the brushless motor stator, the position deviation is prevented, and the induction accuracy of Hall induction components is improved, and the problem of inaccurate positioning of the stator in the prior art is solved. It significantly improves the handling stability and reliability of the motor.
Patent Information
- Application Number
- CN202421052591.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-14
- Publication Date
- 2025-01-03
- Estimated Expiration
- 2034-05-14
AI Technical Summary
Existing brushless motor stator Hall induction components are prone to position deviation, affecting the induction accuracy, resulting in poor motor handling stability and reliability.
By setting up installation columns, hall plates and iron cores in the motor stator, and using the cooperation of bumps and limiting slots, precise positioning and installation of Hall plates and iron cores can be achieved, prevent position deviation, and improve the induction accuracy of induction components .
It effectively prevents the position deviation of Hall induction components and windings, improves the induction accuracy and signal accuracy, and enhances the handling stability and reliability of the brushless motor.
Smart Images
Figure CN222301598U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of motors, in particular to a motor stator and a brushless motor. Background Art
[0002] A brushless motor is a type of motor. Its main components include a stator and a rotor. Compared with a brushed motor, a brushless motor adopts electronic commutation, in which the coil remains stationary and the magnetic poles rotate. Specifically, a brushless motor is provided with a Hall sensing component, which senses the position of the permanent magnet's magnetic poles and uses electronic circuits to switch the direction of the current in the coil in a timely manner to ensure that the magnetic force in the correct direction is generated, thereby driving the motor. It has the advantages of low noise, less vibration, less heat and long life.
[0003] However, with the advancement of technology, people have higher and higher requirements for the driving force and speed of brushless motors, which also puts higher requirements on the stability of brushless motors. Since the stator of the brushless motor is provided with Hall sensing components for sensing and transmitting signals, the drive control of the brushless motor is realized. However, the Hall sensing components of the existing brushless motor stators are prone to position deviation during installation or use, thereby affecting the sensing accuracy of the Hall sensing components, thereby greatly reducing the control stability of the brushless motor and having poor reliability. Utility Model Content
[0004] Based on this, it is necessary to provide a motor stator and a brushless motor.
[0005] The utility model solves the above technical problems with the following technical solutions: a motor stator, comprising:
[0006] A base, wherein the base is provided with a mounting column, an outer side wall of the mounting column is provided with a first positioning groove and a second positioning groove, and the first positioning groove and the second positioning groove are adjacently arranged;
[0007] A Hall plate, wherein the Hall plate is provided with a through hole, the Hall plate is sleeved on the mounting column through the through hole, a protrusion is provided on the inner side wall of the through hole, and the protrusion is arranged in the first positioning groove;
[0008] An iron core, wherein the iron core is provided with a mounting hole, the iron core is sleeved on the mounting column through the mounting hole, the iron core is arranged adjacent to the Hall plate, the inner side wall of the mounting hole is provided with a limiting groove, and the limiting groove is connected to the second positioning groove; and
[0009] A positioning member is inserted into the second positioning groove and the limiting groove.
[0010] In one embodiment, two first positioning grooves are provided, and the two first positioning grooves are symmetrically arranged with respect to the central axis of the mounting column. Two protrusions are provided, and each protrusion is arranged in one of the first positioning grooves.
[0011] In one embodiment, the second positioning groove is aligned with the first positioning groove.
[0012] In one embodiment, the positioning member is a positioning pin.
[0013] In one embodiment, the base is provided with an extension portion, and the outer side wall of the Hall plate is provided with a supporting portion, and the supporting portion is in contact with the extension portion.
[0014] In one embodiment, the outer side wall of the mounting column is provided with a first protrusion, and the outer diameter of the first protrusion is greater than the diameter of the through hole.
[0015] In one embodiment, the outer side wall of the mounting column is provided with a second protrusion, and the outer diameter of the second protrusion is greater than the diameter of the mounting hole.
[0016] In one embodiment, the Hall plate is provided with at least one Hall sensor, and the Hall sensors are arranged at intervals from each other.
[0017] In one embodiment, it further includes a plurality of windings, the outer side wall of the core is provided with a plurality of winding frames, the winding frames are arranged at intervals from each other, and each winding is wound on a winding frame.
[0018] A brushless motor comprises: the motor stator described in any one of the above embodiments.
[0019] Compared with the prior art, the utility model has at least the following advantages:
[0020] The utility model is provided with a base, the mounting column and the base are integrally formed and protruded from the base, the Hall plate and the iron core are sequentially sleeved on the mounting column, and are positioned and installed on the mounting column. Specifically, the Hall plate is provided with a convex block, the convex block is adapted to the shape of the first positioning groove, and the convex block is engaged with the first positioning groove, so that the Hall plate is clamped and installed on the mounting column, preventing the Hall plate from shifting at will, and realizing the positioning and installation of the Hall plate. In addition, the iron core is provided with a limiting groove adapted to the second positioning groove, the limiting groove and the second positioning groove are connected to each other and form a clamping groove, and then through By installing the positioning piece in the slot, the iron core can be limited to prevent the iron core from shifting at will, and the iron core can be positioned and installed, so that the Hall plate and the iron core can be positioned and installed on the mounting column, thereby achieving accurate positioning and installation of the Hall sensing components on the Hall plate and the windings on the iron core, ensuring installation accuracy and preventing positional offset, thereby greatly improving the sensing accuracy of the Hall sensing components, ensuring accurate sensing and feedback signals, and facilitating accurate control of the winding current, thereby greatly improving the control stability of the brushless motor and having good reliability. BRIEF DESCRIPTION OF THE DRAWINGS
[0021] Figure 1 is a schematic structural diagram of a motor stator according to an embodiment;
[0022] Figure 2 A schematic diagram of a three-dimensional exploded structure of a motor stator according to an embodiment;
[0023] Figure 3 A schematic diagram of the structure of a base and a Hall plate of a motor stator according to an embodiment;
[0024] Figure 4 Schematic diagram of the structure of a brushless 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 and Figure 3 In one embodiment, a motor stator 10 is provided, including a base 100, a Hall plate 200, an iron core 300 and a positioning member 400. The base 100 is provided with a mounting column 110, and the outer side wall of the mounting column 110 is provided with a first positioning groove 111 and a second positioning groove 112, and the first positioning groove 111 and the second positioning groove 112 are arranged adjacent to each other. The Hall plate 200 is provided with a through hole 210, and the Hall plate 200 is sleeved on the mounting column 110 through the through hole 210, and the inner side wall of the through hole 210 is provided with a protrusion 211, and the protrusion 211 is arranged in the first positioning groove 111. The iron core 300 is provided with a mounting hole 310, and the iron core 300 is sleeved on the mounting column 110 through the mounting hole 310. The iron core 300 is disposed adjacent to the Hall plate 200, and the inner side wall of the mounting hole 310 is provided with a limiting groove 311, and the limiting groove 311 is communicated with the second positioning groove 112. The positioning member 400 is inserted into the second positioning groove 112 and the limiting groove 311.
[0028] It should be noted that the base 100 is a shell-like structure, the mounting column 110 is integrally formed with the base 100, the mounting column 110 is a hollow columnar structure, and is protruding from the base 100, and the outer wall of the mounting column 110 begins to have a first positioning groove 111 and a second positioning groove 112, the first positioning groove 111 and the second positioning groove 112 are arranged along the length direction of the mounting column 110, and are arranged in a strip shape, and the first positioning groove 111 and the second positioning groove 112 are arranged adjacent to each other from bottom to top, and the Hall plate 200 is an annular plate structure with a through hole 210, and the Hall plate 200 is a circuit board, and the Hall plate 200 is installed with a Hall plate 210. The inductive component is used to sense the position of the magnet poles and feedback the signal, so as to facilitate the control of the current direction of the winding 500 and output the correct current direction, so as to facilitate the electromagnetic induction coordination with the magnet poles on the rotor of the brushless motor to realize the driving of the rotor of the brushless motor and realize the driving and control of the brushless motor. The iron core 300 is a hollow cylindrical structure with a mounting hole 310. The winding 500 is wound on the iron core 300. By energizing the winding 500, it is subsequently electromagnetically inductively coordinated with the magnet poles on the rotor of the brushless motor to realize the driving of the rotor, thereby realizing the driving of the brushless motor.
[0029] Specifically, in this embodiment, the Hall plate 200 and the iron core 300 are sequentially sleeved on the mounting column 110 from bottom to top, and the Hall plate 200 and the iron core 300 are positioned and installed on the mounting column 110, wherein the inner side wall of the through hole 210 of the Hall plate 200 is provided with a protruding block 211, and the block 211 is adapted to the shape of the first positioning groove 111, and the block 211 is engaged with the first positioning groove 111, so that the Hall plate 200 is engaged and installed on the mounting column 110, and the block 211 can be bonded and fixed to the inner side wall of the first positioning groove 111 by applying glue to reinforce it, so as to prevent the Hall plate 200 from rotating and shifting at will, thereby realizing the positioning and installation of the Hall plate 200, and in addition, the iron core 300 is provided with a limiting groove 311 adapted to the second positioning groove 112, and the limiting groove 311 and the second positioning groove 112 are interconnected to form a slot, and then the positioning piece 400 is installed in the slot. Similarly, the positioning piece 400 can also be glued and fixed to the inner wall of the slot by glue, so that the iron core 300 can be limited to prevent the iron core 300 from rotating and shifting at will, so as to achieve the positioning installation of the iron core 300, thereby positioning and installing the Hall plate 200 and the iron core 300 on the mounting column 110, so as to achieve the precise positioning and installation of the Hall sensing components on the Hall plate 200 and the winding 500 on the iron core 300, ensure the installation accuracy, and prevent the occurrence of positional offset, thereby greatly improving the sensing accuracy of the Hall sensing components, ensuring precise sensing and feedback signals, which is beneficial to ensuring precise control of the current of the winding 500, thereby greatly improving the control stability of the brushless motor and having good reliability.
[0030] In one embodiment, two first positioning grooves 111 are provided, and the two first positioning grooves 111 are symmetrically arranged with respect to the central axis of the mounting column 110, and two protrusions 211 are provided, and each protrusion 211 is arranged in one of the first positioning grooves 111. It can be understood that there are two first positioning grooves 111, and they are symmetrically arranged with respect to each other, so that the Hall plate 200 can be installed on the mounting column 110 by positioning it left and right, and the limiting effect is better, which can further prevent the Hall plate 200 from rotating and moving at will, and further ensure the installation accuracy of the Hall plate 200.
[0031] In one embodiment, the second positioning groove 112 is aligned with one of the first positioning grooves 111. It can be understood that in this embodiment, two first positioning grooves 111 are provided, and the two first positioning grooves 111 are symmetrically arranged. The second positioning groove 112 is opened above any one of the first positioning grooves 111, and is aligned with the first positioning groove 111 up and down. In this way, it is convenient to perform the groove processing when the mounting column 110 is grooved, which is conducive to reducing the difficulty of processing and forming the motor stator. At the same time, it is also convenient to uniformly position and install the Hall plate 200 and the iron core 300, which is conducive to reducing the difficulty of installation and improving installation efficiency.
[0032] In one embodiment, the positioning member 400 is a positioning pin. It is understandable that the positioning member 400 adopts a positioning pin, which is a commonly used positioning part, is cylindrical, has good roundness, and is conducive to reducing the friction when the positioning member 400 is installed in the second positioning groove 112 and the limiting groove 311, is easy to install, has a good positioning effect, and is conducive to improving the installation accuracy.
[0033] See also Figure 2 and Figure 3In one embodiment, the base 100 is provided with an extension 120, and the outer side wall of the Hall plate 200 is provided with a supporting portion 220, and the supporting portion 220 is in contact with the extension 120. It can be understood that the base 100 is provided with the extension 120 around it, so that a shell-shaped base 100 structure and a groove structure can be formed. In this way, by sleeve-mounting the Hall plate 200 on the mounting column 110 and embedding it in the groove structure of the base 100, the Hall plate 200 can be protected. At the same time, the outer periphery of the Hall plate 200 is provided with a supporting portion 220. In this embodiment, a plurality of supporting portions 220 are provided, and each supporting portion 220 is radially distributed with the central axis of the Hall plate 200 as the center. Correspondingly, the base 10 0 is provided with a plurality of avoidance grooves, each avoidance groove is arranged corresponding to each abutting portion 220, which can play a positioning role, so that the Hall plate 200 is positioned and installed on the base 100. At the same time, the inner side wall of the avoidance groove can have a slight interference fit with each abutting portion 220, so that each abutting portion 220 and the extension portion 120 abut against each other, which can support the Hall plate 200, is conducive to dispersing the stress on the Hall plate 200, and plays a protective role on the Hall plate 200, which is conducive to improving the overall structural strength and reliability of the motor stator.
[0034] See also Figure 2 and Figure 3 In one embodiment, the outer wall of the mounting column 110 is provided with a first protrusion 113, and the outer diameter of the first protrusion 113 is greater than the diameter of the through hole 210. It can be understood that the outer wall of the mounting column 110 near the base 100 is provided with a first annular protrusion 113, and the outer diameter of the first protrusion 113 is slightly greater than the diameter of the through hole 210 of the Hall plate 200. In this way, under the action of external force, the Hall plate 200 is deformed to a certain extent and is sleeved and installed on the end of the mounting column 110 near the base 100. The raised first protrusion 113 can limit the Hall plate 200 in the axial direction, preventing the Hall plate 200 from falling out and moving at will, thereby further realizing the precise positioning and installation of the Hall plate 200, improving the installation accuracy of the Hall plate 200, thereby ensuring the precise detection of the Hall sensing components on the Hall plate 200, which is conducive to improving the control stability and reliability of the subsequent brushless motor.
[0035] See also Figure 2 and Figure 3In one embodiment, the outer side wall of the mounting column 110 is provided with a second protrusion 114, and the outer diameter of the second protrusion 114 is greater than the diameter of the mounting hole 310. It can be understood that by providing an annular second protrusion 114 on the outer side wall of the end of the mounting column 110 away from the base 100, the outer diameter of the second protrusion 114 is slightly greater than the diameter of the mounting hole 310 of the iron core 300, so that under the action of external force, after the iron core 300 is sleeved on the mounting column 110, the iron core 300 can produce an interference fit with the second protrusion 114, preventing the iron core 300 from moving randomly in the axial direction, further realizing the limited installation of the iron core 300, and the positioning installation effect is good.
[0036] See also Figure 1 and Figure 3 In one embodiment, the Hall plate 200 is provided with at least one Hall sensor 201, and each Hall sensor 201 is arranged at intervals from each other. It can be understood that a plurality of Hall sensors 201 are arranged on a side of the Hall plate 200 away from the base 100, and the Hall sensors 201 are arranged at intervals from each other and are radially distributed with the central axis of the Hall plate 200 as the center, so that each Hall sensor can be evenly distributed on the Hall plate 200. By providing a plurality of Hall sensors 201, the positions of the plurality of magnet poles on the rotor can be sensed and monitored separately, and the sensing accuracy is higher, which is conducive to improving the overall control stability and reliability of the brushless motor.
[0037] See also Figure 1 and Figure 2 In one embodiment, it further includes a plurality of windings 500, and the outer wall of the core 300 is provided with a plurality of winding frames 320, each of the winding frames 320 is arranged at intervals, and each of the windings 500 is wound on a winding frame 320. It can be understood that the outer wall of the core 300 is provided with a plurality of winding frames 320, the winding frames 320 are T-shaped, and the winding frames 320 are radially distributed with the central axis of the core 300 as the center, so that the winding frames 320 can be evenly distributed, and then each winding 500 is wound on each winding frame 320 in a one-to-one correspondence, so that each winding 500 is evenly installed on the core 300. Specifically, a winding 500 is formed by a plurality of coils wound on the winding frame 320, and the winding 500 is used to generate magnetic and electric induction with the magnetic poles of the magnet on the rotor after the current is passed, so as to realize the driving of the brushless motor.
[0038] See also Figure 4 In one embodiment, a brushless motor 20 is also provided, comprising: the motor stator 10 described in any of the above embodiments.
[0039] It should be noted that, in the present embodiment, the brushless motor further comprises a motor rotor 30, the motor rotor 30 comprises an output shaft 40, a rotating shell 50 and an induction magnet (not shown), the output shaft 40 is connected to the rotating shell 50, the induction magnet is mounted on the inner wall of the rotating shell 50, the induction magnet is two magnets or multiple groups of magnets with different polarities, and can generate a magnetic field, and a bearing is respectively provided at both ends of the output shaft 40, so that the output shaft 40 is rotatably mounted on the middle part of the hollow mounting column 110 of the motor stator 10 through the bearing, and the output shaft 40 is rotated by the electromagnetic induction cooperation of the winding 500 of the motor stator 10 and the induction magnet of the motor rotor 30, thereby realizing the driving rotation of the brushless motor, and the brushless motor can ensure accurate sensing and feedback signals by improving the sensing accuracy of the Hall sensing components, which is beneficial to ensure accurate control of the winding current, thereby greatly improving the control stability of the brushless motor and having good reliability.
[0040] Compared with the prior art, the utility model has at least the following advantages:
[0041] The utility model is provided with a base, the mounting column and the base are integrally formed and protruded from the base, the Hall plate and the iron core are sequentially sleeved on the mounting column, and are positioned and installed on the mounting column. Specifically, the Hall plate is provided with a convex block, the convex block is adapted to the shape of the first positioning groove, and the convex block is engaged with the first positioning groove, so that the Hall plate is clamped and installed on the mounting column, preventing the Hall plate from shifting at will, and realizing the positioning and installation of the Hall plate. In addition, the iron core is provided with a limiting groove adapted to the second positioning groove, the limiting groove and the second positioning groove are connected to each other and form a clamping groove, and then through By installing the positioning piece in the slot, the iron core can be limited to prevent the iron core from shifting at will, and the iron core can be positioned and installed, so that the Hall plate and the iron core can be positioned and installed on the mounting column, thereby achieving accurate positioning and installation of the Hall sensing components on the Hall plate and the windings on the iron core, ensuring installation accuracy and preventing positional offset, thereby greatly improving the sensing accuracy of the Hall sensing components, ensuring accurate sensing and feedback signals, and facilitating accurate control of the winding current, thereby greatly improving the control stability of the brushless motor and having good reliability.
[0042] 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.
[0043] 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 stator, characterized in that: include: A base, wherein the base is provided with a mounting column, an outer side wall of the mounting column is provided with a first positioning groove and a second positioning groove, and the first positioning groove and the second positioning groove are adjacently arranged; A Hall plate, wherein the Hall plate is provided with a through hole, the Hall plate is sleeved on the mounting column through the through hole, a protrusion is provided on the inner side wall of the through hole, and the protrusion is arranged in the first positioning groove; An iron core, wherein the iron core is provided with a mounting hole, the iron core is sleeved on the mounting column through the mounting hole, the iron core is arranged adjacent to the Hall plate, the inner side wall of the mounting hole is provided with a limiting groove, and the limiting groove is connected to the second positioning groove; and A positioning member is inserted into the second positioning groove and the limiting groove.
2. The motor stator according to claim 1, characterized in that: There are two first positioning grooves, which are symmetrically arranged with respect to the central axis of the mounting column. There are two protrusions, each of which is arranged in one of the first positioning grooves.
3. The motor stator according to claim 2, characterized in that: The second positioning groove is aligned with the first positioning groove.
4. The motor stator according to claim 1, characterized in that: The positioning member is a positioning pin.
5. The motor stator according to claim 1, characterized in that: The base is provided with an extension portion, and the outer side wall of the Hall plate is provided with a supporting portion, and the supporting portion is in contact with the extension portion.
6. The motor stator according to claim 1, characterized in that: The outer side wall of the mounting column is provided with a first protrusion, and the outer diameter of the first protrusion is greater than the diameter of the through hole.
7. The motor stator according to claim 6, characterized in that: The outer side wall of the mounting column is provided with a second protrusion, and the outer diameter of the second protrusion is greater than the diameter of the mounting hole.
8. The motor stator according to any one of claims 1 to 7, characterized in that: The Hall plate is provided with at least one Hall sensor, and the Hall sensors are arranged at intervals from each other.
9. The motor stator according to any one of claims 1 to 7, characterized in that: It also includes a plurality of windings. The outer side wall of the iron core is provided with a plurality of winding frames, the winding frames are arranged at intervals from each other, and each winding is wound on a winding frame.
10. A brushless motor, characterized in that: include: A stator for an electric motor as claimed in any one of claims 1 to 9.