A motor structure and a brushless motor

Abstract

The utility model belongs to small -size motor related technical field especially, it is related to a motor structure and brushless motor. Through setting stator subassembly, including winding, be provided with rotor passageway in winding, and setting rotor subassembly, including first magnet and pivot, pivot passes through rotor passageway setting, first magnet is sleeved on the pivot and first magnet sets up inside surface in winding, wherein, first end of pivot is provided with first wire slot, and first magnet is provided with second wire slot in the side surface close to first end, first wire slot and second wire slot are on same straight line, to through after installing, the angle of first wire slot is adjusted to adjust the angle of second wire slot and realize the angle of first magnet is adjusted. Through observation adjustment first wire slot angle indirectly adjusts the angle of first magnet, thereby avoids disassembling motor adjustment first magnet's angle, thereby reduces the adjustment time, promotes motor assembly rate.

Description

Technical Field

[0001] This utility model belongs to the technical field of small motors, and in particular relates to a motor structure and a brushless motor. Background Technology

[0002] As a new type of motor that uses electronic commutation instead of mechanical commutation, brushless motors have been widely used in many fields such as new energy vehicles, industrial automation equipment, smart homes, aerospace, and medical devices due to their advantages such as no commutation sparks, low noise, high reliability, long service life and high power density.

[0003] Brushless motors typically have magnets on their rotors, which interact with the windings to rotate the rotor assembly. These magnets also need to interact with Hall effect sensors on the motor's circuit board to generate Hall signals. Therefore, the magnets are usually installed at a specific angle when mounted in the motor.

[0004] In existing technologies, since the angle of the magnet cannot be confirmed after it is installed in the motor housing, the motor assembly process requires constant installation and disassembly to adjust the rotor. Therefore, in mass production, a significant amount of time is needed to adjust the installation angle, which is not conducive to the rapid assembly and production of motors. Utility Model Content

[0005] To address the problem that "during mass production, the angle of the magnet cannot be confirmed after it is installed in the motor housing, thus requiring constant installation and disassembly during motor assembly, which is detrimental to rapid motor assembly and production," this utility model proposes a motor structure and a brushless motor.

[0006] This utility model solves the above problems through the following technical means: In a first aspect, this utility model proposes a motor structure, comprising: A stator assembly, including windings, in which rotor channels are provided; The rotor assembly includes a first magnet and a rotating shaft, the rotating shaft being disposed through a rotor channel, the first magnet being sleeved on the rotating shaft and disposed on the inner side of the winding; The first end of the rotating shaft is provided with a first groove, and the side of the first magnet near the first end is provided with a second groove. The first groove and the second groove are on the same straight line, so that the angle of the first magnet can be indirectly adjusted by adjusting the angle of the second groove after installation.

[0007] By configuring a stator assembly, including windings with rotor channels within them, and a rotor assembly, including a first magnet and a shaft, with the shaft passing through the rotor channels, and the first magnet sleeved on the shaft and positioned on the inner side of the windings, the first magnet is configured with a first groove at its first end and a second groove on the side of the first magnet near its first end. The first and second grooves are collinear, allowing the angle of the first magnet to be adjusted by adjusting the angle of the first groove after installation, thereby adjusting the angle of the second groove. By indirectly adjusting the angle of the first magnet through observing and adjusting the angle of the first groove, the angle of the first magnet can be adjusted without disassembling the motor, thus reducing adjustment time and increasing the motor assembly speed.

[0008] In some embodiments, the rotor assembly further includes a second magnet and a rotating housing. The rotating housing has a rotating side and a connecting portion. The rotating side is located outside the winding, and the connecting portion extends from one end of the rotating side and is fixed to the rotating shaft. The magnet is fixed to the rotating housing and is located on the side close to the winding.

[0009] In some embodiments, a third groove is provided on one side of the second magnet near the first end, and the third groove, the second groove, and the first groove are all arranged on the same straight line.

[0010] In some embodiments, the first groove, the second groove, and the third groove are arranged on the first straight line, and the first magnet and the second magnet are symmetrical through the first straight line, and the first magnet and the second magnet on the same side of the first straight line have the same polarity.

[0011] In some embodiments, a housing is also included, which includes a base, a front cover, and an outer shell; the base is disposed at one end of the winding, the outer shell is sleeved on the outside of the winding and connected to the base, the front cover is connected to the end of the outer shell away from the base, the front cover and the base are provided with a first connecting through hole, the rotating shaft is disposed through the rotor channel and the first connecting through hole, and the front cover is provided with a ventilation hole.

[0012] In some embodiments, a circuit board is provided on the base, and a second connecting through hole is provided in the circuit board. The rotating shaft passes through the second connecting through hole, and the circuit board is located on the side of the base away from the winding.

[0013] In some embodiments, the circuit board assembly is provided with a Hall element, the Hall element is set according to a Hall angle, the circuit board is set with a first direction according to the Hall angle, and the first groove is rotated to the first direction and set in the second connecting through hole.

[0014] In some embodiments, a magnetic ring is provided on the rotating shaft, a first magnet is provided on the magnetic ring, and the magnetic ring is provided with at least one glue storage groove.

[0015] In some implementations, balancing blocks are provided on both sides of the magnetic ring.

[0016] Secondly, this utility model proposes a brushless motor, including the motor structure as described in any of the claims in the first aspect.

[0017] The advantages of this novel motor structure and brushless motor are: By configuring a stator assembly, including windings with rotor channels within them, and a rotor assembly, including a first magnet and a shaft, with the shaft passing through the rotor channels, and the first magnet sleeved on the shaft and positioned on the inner side of the windings, the first magnet is configured with a first groove at its first end and a second groove on the side of the first magnet near its first end. The first and second grooves are collinear, allowing the angle of the first magnet to be adjusted by adjusting the angle of the first groove after installation, thereby adjusting the angle of the second groove. By indirectly adjusting the angle of the first magnet through observing and adjusting the angle of the first groove, the angle of the first magnet can be adjusted without disassembling the motor, thus reducing adjustment time and increasing the motor assembly speed. Attached Figure Description

[0018] Figure 1 This is a perspective view of Embodiment 1 of the motor structure of this utility model; Figure 2 The three-dimensional representation of Embodiment 2 of the motor structure of this utility model Figure 1 ; Figure 3 The three-dimensional representation of Embodiment 2 of the motor structure of this utility model Figure 2 ; Figure 4 This is a cross-sectional view of the rotating housing of the motor structure of this utility model; Figure 5 This is a magnetic field distribution diagram of the motor structure of this utility model; Figure 6 This is a perspective view of the rotating shaft of the motor structure of this utility model; Figure 7 This is a cross-sectional view of the brushless motor structure of this utility model.

[0019] Figure label: 11. Windings; 21. First magnet; 211. Second groove; 22. Rotating shaft; 221. First groove; 23. Second magnet; 231. Third groove; 24. Rotating housing; 241. Rotating side; 242. Connecting part; 25. Magnetic ring; 251. Glue storage tank; 31. Base; 32. Front cover; 33. Housing; 34. Circuit board; 35. Hall effect sensor; X, the first straight line.

[0020] Specific implementation methods: It should be noted that, in the absence of conflict, the embodiments and technical features in the embodiments of this utility model can be combined with each other. The detailed description in the specific embodiments should be understood as an explanation of the spirit of this utility model and should not be regarded as an improper limitation of this utility model.

[0021] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the specific technical solutions of this utility model will be further described in detail below with reference to the accompanying drawings of the embodiments of this utility model. The following embodiments are used to illustrate this utility model, but are not intended to limit the scope of this utility model.

[0022] In the embodiments of this utility model, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the embodiments of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0023] Furthermore, in this embodiment of the invention, directional terms such as "upper," "lower," "left," and "right" are defined relative to the positions of the components shown in the accompanying drawings. It should be understood that these directional terms are relative concepts, used for relative description and clarification, and can change accordingly depending on the position of the components in the accompanying drawings.

[0024] In the embodiments of this utility model, unless otherwise explicitly specified and limited, the term "connection" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral part; it can be a direct connection or an indirect connection through an intermediate medium.

[0025] In embodiments of this invention, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0026] In this embodiment of the invention, the terms "exemplary" or "for example" are used to indicate that something is an example, illustration, or description. Any embodiment or design described as "exemplary" or "for example" in this embodiment of the invention should not be construed as being more preferred or advantageous than other embodiments or designs. Specifically, the use of the terms "exemplary" or "for example" is intended to present the relevant information in a specific manner.

[0027] Example 1: like Figure 1As shown, this embodiment proposes a motor structure, including: The stator assembly includes a winding 11, in which a rotor channel is provided; The rotor assembly includes a first magnet 21 and a rotating shaft 22. The rotating shaft 22 is disposed through the rotor channel, and the first magnet 21 is sleeved on the rotating shaft 22 and disposed on the inner side of the winding 11. The first end of the rotating shaft 22 is provided with a first groove 221, and the side of the first magnet 21 near the first end is provided with a second groove 211. The first groove 221 and the second groove 211 are on the same straight line, so that the angle of the first magnet 21 can be indirectly adjusted by adjusting the angle of the first groove 221 after installation.

[0028] Specifically, the stator assembly includes a winding 11, in which a rotor channel is provided for housing the rotor within the stator assembly. The rotor assembly includes a shaft 22 and a first magnet 21 that interacts with the winding 11. The shaft 22 passes through the rotor channel, and the first magnet 21 is sleeved on the shaft 22. During motor installation, the first magnet 21 is positioned on the inner side of the winding 11, thereby enabling the interaction between the first magnet 21 and the winding 11, which in turn causes the shaft 22 to rotate. The first end of the shaft 22 is provided with a first groove 221, which is typically the end connected to the motor circuit board 34, allowing for more intuitive adjustment based on the Hall angle of the Hall effect sensor. A second groove 211 is provided on one side of the magnet near the first end. When the first magnet 21 and the rotating shaft 22 are installed, the second groove 211 aligns the first groove 221 and the second groove 211 into a straight line. Therefore, when adjusting the angle, the direction of the second groove 211 can be indirectly adjusted by focusing only on the direction of the first groove 221. The advantage of this design is that after the motor is installed, only the two ends of the rotating shaft 22 are usually visible. Therefore, traditional methods cannot determine the installation angle of the internal first magnet 21, requiring repeated disassembly and adjustment. However, with the first groove 221 and the second groove 211, the angle of the second groove 211 can be adjusted by adjusting the angle of the first groove 221, thereby further adjusting the angle of the first magnet 21 and avoiding the need for repeated disassembly and adjustment of the first magnet 21. Typically, the second groove 211 also serves to separate the magnetic poles, i.e., the N pole and the S pole, thus allowing for better adjustment of the overall installation direction and position of the first magnetic pole. In other embodiments, the first magnetic pole may also have multiple N poles and S poles intersecting, and the second groove 211 may be set at different positions according to actual needs, usually at the intersection of the N poles and S poles.

[0029] By configuring a stator assembly, including a winding 11 with a rotor channel within it, and a rotor assembly, including a first magnet 21 and a shaft 22, the shaft 22 passes through the rotor channel. The first magnet 21 is sleeved on the shaft 22 and positioned on the inner side of the winding 11. A first groove 221 is provided at the first end of the shaft 22, and a second groove 211 is provided on the side of the first magnet 21 near the first end. The first groove 221 and the second groove 211 are collinear, allowing the angle of the first magnet 21 to be adjusted by adjusting the angle of the first groove 221 after installation, thereby adjusting the angle of the second groove 211. By observing and adjusting the angle of the first groove 221, the angle of the first magnet 21 is indirectly adjusted, avoiding the need to disassemble the motor to adjust the angle of the first magnet 21, thus reducing adjustment time and increasing the motor assembly speed.

[0030] Example 2: exist Figure 1 Based on this, combined with, for example Figures 2-6 As shown, this embodiment further explains and optimizes the structure proposed in Embodiment 1: In some embodiments, the rotor assembly further includes a second magnet 23 and a rotating housing 24. The rotating housing 24 is provided with a rotating side 241 and a connecting portion 242. The rotating side 241 is provided on the outside of the winding 11. The connecting portion 242 extends from one end of the rotating side 241 and is fixed to the rotating shaft 22. The magnet is fixed on the rotating housing 24 and is provided on the side close to the winding 11.

[0031] Specifically, the rotor assembly also includes a second magnet 23 and a rotating housing 24. The rotating housing 24 is used to mount the second magnet 23 outside the winding 11 and rotate with the rotor. The arrangement of the first magnet 21 and the second magnet 23 can enhance the strength of the magnetic field. Compared to the magnetic field strength of a single magnet on the winding 11, the arrangement of two magnets on both sides of the winding 11 has a better mutual effect. The rotating housing 24 is provided by a rotating side 241 and a connecting part 242. The rotating side 241 is usually a hollow cylinder to fit the cylindrical winding 11, so as to fit around the outside of the winding 11. The second magnet 23 is provided on the side of the rotating side 241 near the winding 11. The second magnet 23 can be a magnetic tile or a ring magnet, and is fixed to the side of the rotating side 241 near the winding 11 by means of bonding, snapping, or other fixing methods. The area of ​​the second magnet 23 can be the same as the side area of ​​the winding 11, so that the second magnet 23 can be aligned with the winding 11 and generate a better rotation effect. The connecting part 242 is used to connect to the rotating shaft 22 so as to rotate with the rotating shaft 22. The connecting part 242 is connected to one end of the rotating side 241 so that the connecting part 242 extends from one end of the winding 11 to the rotating shaft 22. The rotating shaft 22 may be provided with a groove for connecting the connecting part 242 for connection and fixation. Specifically, the shape of the connecting part 242 may be that it extends from the bottom side of the cylinder towards the center and forms a hollow cylinder in the middle so as to fit onto the rotating shaft 22. The hollow cylinder in the middle can make the contact surface between the connecting part 242 and the rotating shaft 22 more, so that the connecting part 242 is more stable when fixed on the rotating shaft 22. Alternatively, it can be fixed by drilling alignment holes on the hollow cylinders of the rotating shaft 22 and the connecting part 242 respectively, and then fixing with alignment screws.

[0032] In some embodiments, a third groove 231 is provided on one side of the second magnet 23 near the first end, and the third groove 231, the second groove 211, and the first groove 221 are all arranged on the same straight line.

[0033] Specifically, a third groove 231 is provided on one side of the second magnet 23 near the first end. The third groove 231 is used to align with the second groove 211 and the first groove 221, so that when the angle of the first groove 221 is adjusted, the position of the third groove 231 can be indirectly adjusted, avoiding the need to disassemble and readjust the angle of the second magnet 23.

[0034] In some embodiments, such as Figure 5 As shown, the first groove 221, the second groove 211 and the third groove 231 are arranged on the first straight line X, and the first magnet 21 and the second magnet 23 are symmetrical through the first straight line X. The first magnet 21 and the second magnet 23 on the same side of the first straight line X have the same polarity.

[0035] Specifically, from a top-down perspective, since the first magnet 21, the second magnet 23, and the rotating shaft 22 are all cylindrical (i.e., circular or cylindrical from a top view), the first groove 221, the second groove 211, and the third groove 231 are positioned on the first straight line X, which is on a straight line containing one diameter of the circle, thus allowing for better adjustment of the angles of the first magnet 21 and the second magnet 23. In some preferred embodiments, the first magnet 21 and the second magnet 23 are each provided with only one N pole and one S pole, respectively positioned on both sides of the third groove 231 and the second groove 211, and the polarities of the first magnet 21 and the second magnet 23 on the same side are set to be consistent, so that the first magnet 21 and the second magnet 23 can simultaneously act on the winding 11, causing the rotating shaft 22 to rotate. In some optional embodiments, the first magnet 21 and the second magnet 23 can be provided with multiple N poles and multiple S poles.

[0036] In some embodiments, the device further includes a housing, which includes a base 31, a front cover 32, and an outer shell 33. The base 31 is disposed at one end of the winding 11, the outer shell 33 is sleeved on the outside of the winding 11 and connected to the base 31, the front cover 32 is connected to the end of the outer shell 33 away from the base 31, the front cover 32 and the base 31 are provided with a first connecting through hole, the rotating shaft 22 is disposed through the rotor channel and the first connecting through hole, and the front cover 32 is provided with a ventilation hole.

[0037] Specifically, the housing includes a base 31, a front cover 32, and an outer shell 33. The base 31 is located at one end of the winding 11 and has a connecting groove for connecting the bottom of the winding 11. The shape and size of the connecting groove are consistent with the size of the winding 11. The outer shell 33 is sleeved on the outside of the winding 11 and connected to the base 31. The outer shell 33 is fixedly connected to the base 31 by making alignment holes in the outer shell 33 and using screws for alignment, thereby fixing the outer shell 33 to the base 31 and preventing it from falling off, thus protecting the winding 11 and magnets inside the motor. The front cover 32 is connected to the other end of the first end where the outer shell 33 is connected to the base 31, so that the rotor assembly and stator assembly can be protected by the housing within the space. Preferably, the front cover 32 and the outer shell 33 can be integrally formed.

[0038] In some embodiments, a circuit board 34 is provided on the base 31, and a second connecting through hole is provided in the circuit board 34. The rotating shaft 22 passes through the second connecting through hole, and the circuit board 34 is provided on the side of the base 31 away from the winding 11.

[0039] Specifically, a circuit board 34 is provided on the base 31 for connecting and commutating with the winding 11 and connecting with the external wiring harness. The circuit board 34 has a second connecting through hole in the middle so that the rotating shaft 22 can pass through the second connecting through hole. The circuit board 34 is located on the side of the base 31 away from the winding 11. Thus, after the base 31 is installed, the end of the base 31 near the winding 11 is located inside the outer casing 33, making it inconvenient to adjust the direction of the first magnet 21. Therefore, the winding 11 can be adjusted on the outside by using the circuit board 34 at the end away from the winding 11. Furthermore, the through hole in the middle of the base 31 allows the rotating shaft 22 to pass through the through hole and connect with the second connecting through hole. This arrangement can better enable the rotating shaft 22 to cooperate with the Hall device on the circuit board 34 for angle adjustment.

[0040] In some embodiments, the circuit board 34 assembly is provided with a Hall component 35, the Hall component 35 is set according to the Hall angle, the circuit board 34 is set with a first direction according to the Hall angle, and the first groove 221 is rotated to the first direction and set in the second connecting through hole.

[0041] Specifically, the circuit board 34 is set at a certain angle to form a Hall angle, thereby enabling the Hall component 35 to sense the magnet. The circuit board 34 is set with a first direction according to the Hall angle, which is the installation direction of the rotating shaft 22. Alignment slots can be set on the circuit board 34 to mark the first direction, so that when the rotating shaft 22 is installed, the first groove 221 is set with the first direction, thereby adjusting the direction of the first magnet 21 and avoiding the need to disassemble the entire motor.

[0042] In some embodiments, a magnetic ring 25 is provided on the rotating shaft 22, a first magnet 21 is provided on the magnetic ring 25, and the magnetic ring 25 is provided with at least one glue storage groove 251.

[0043] Specifically, a magnetic ring 25 is provided on the rotating shaft 22. The magnetic ring 25 optimizes the magnetic field distribution of the motor, suppresses electromagnetic interference, or improves specific operating performance. The length of the magnetic ring 25 can be consistent with that of the rotating shaft 22, so that the first magnet 21 can be easily installed on the magnetic ring 25. The magnetic ring 25 can be integrally set with the rotating shaft 22 or installed separately. The magnetic ring 25 is provided with at least one glue storage groove 251 to facilitate the sliding of the first magnet 21 to the installation position of the magnetic ring 25.

[0044] In some embodiments, balance blocks are provided on both sides of the magnetic ring 25.

[0045] Specifically, the balance blocks are set on both sides of the magnetic ring 25 to fix the position of the first magnet 21 and also to improve the stability of the rotation of the shaft 22.

[0046] Example 3: like Figure 7As shown, this embodiment proposes a brushless motor, including the motor structure proposed in either Embodiment 1 or Embodiment 2.

[0047] The serial numbers of the utility model embodiments are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments. The above are only preferred embodiments of this utility model and do not limit the patent scope of this utility model. Any equivalent device or equivalent process transformation made based on the content of this utility model specification and drawings, or direct or indirect application in other related technical fields, are similarly included in the patent protection scope of this utility model.

Claims

1. A motor structure, characterized in that, include: The stator assembly includes a winding (11) in which a rotor channel is provided; as well as The rotor assembly includes a first magnet (21) and a rotating shaft (22), the rotating shaft (22) being disposed through the rotor channel, the first magnet (21) being sleeved on the rotating shaft (22) and disposed on the inner side of the winding (11); The first end of the rotating shaft (22) is provided with a first groove (221), and the first magnet (21) is provided with a second groove (211) on one side near the first end. The first groove (221) and the second groove (211) are on the same straight line so that the angle of the first magnet (21) can be indirectly adjusted by adjusting the angle of the first groove (221) after installation, thereby adjusting the angle of the second groove (211).

2. The motor structure according to claim 1, characterized in that, The rotor assembly also includes a second magnet (23) and a rotating housing (24). The rotating housing (24) is provided with a rotating side (241) and a connecting part (242). The rotating side (241) is located outside the winding (11). The connecting part (242) extends from one end of the rotating side (241) and is fixed to the rotating shaft (22). The magnet is fixed on the rotating housing (24) and is located on a side close to the winding (11).

3. The motor structure according to claim 2, characterized in that, The second magnet (23) has a third groove (231) on one side near the first end. The third groove (231), the second groove (211), and the first groove (221) are all arranged on the same straight line.

4. The motor structure according to claim 3, characterized in that, The first groove (221), the second groove (211) and the third groove (231) are arranged on the first straight line (X), and the first magnet (21) and the second magnet (23) are symmetrical through the first straight line (X). The first magnet (21) and the second magnet (23) on the same side of the first straight line (X) have the same polarity.

5. The motor structure according to claim 1, characterized in that, It also includes a housing, which includes a base (31), a front cover (32), and an outer shell (33); the base (31) is disposed at one end of the winding (11), the outer shell (33) is sleeved on the outside of the winding (11) and the outer shell (33) is connected to the base (31), the front cover (32) is connected to the end of the outer shell (33) away from the base (31), the front cover (32) and the base (31) are provided with a first connecting through hole, the rotating shaft (22) passes through the rotor channel and is disposed in the first connecting through hole, and the front cover (32) is provided with a ventilation hole.

6. The motor structure according to claim 5, characterized in that, A circuit board (34) is provided on the base (31), and a second connecting through hole is provided in the circuit board (34). The rotating shaft (22) passes through the second connecting through hole. The circuit board (34) is located on the side of the base (31) away from the winding (11).

7. The motor structure according to claim 6, characterized in that, The circuit board (34) assembly is provided with a Hall component (35), the Hall component (35) is set according to the Hall angle, the circuit board (34) is set with a first direction according to the Hall angle, and the first wire groove (221) is rotated to the first direction and set in the second connecting through hole.

8. The motor structure according to claim 1, characterized in that, A magnetic ring (25) is provided on the rotating shaft (22), the first magnet (21) is provided on the magnetic ring (25), and the magnetic ring (25) is provided with at least one glue storage groove (251).

9. The motor structure according to claim 1, characterized in that, Balance blocks are provided on both sides of the magnetic ring (25).

10. A brushless motor, characterized in that, Includes the motor structure as described in any one of claims 1-9.

Images