Magnetic assembly, motor, electric power steering system and vehicle
By setting channels on the shaft and injection molding magnetic components, the problem of easy displacement of magnetic components is solved, achieving stable assembly, improving motor yield and processing efficiency, and reducing costs.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ANHUI WELLING AUTO PARTS CO LTD
- Filing Date
- 2024-06-19
- Publication Date
- 2026-04-21
AI Technical Summary
In the existing technology, the assembly structure of the magnetic components is unreasonable, which makes the magnetic components prone to displacement and affects the normal operation of the motor.
The design employs a channel on the shaft, and an injection-molded magnetic component including first and second magnetic parts is formed by injection molding. By utilizing the cooperation of the channel, opening and magnetic parts, the displacement of the magnetic component in the axial, radial and circumferential directions is restricted, ensuring a stable assembly.
This effectively prevents the magnetic components from separating from the shaft, improves the yield rate of motors, simplifies the processing steps, reduces production costs, and ensures the accuracy of the rotating shaft angle.
Smart Images
Figure CN224154038U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of motor technology, and more specifically, to a magnetic component, a motor, an electric power steering system, and a vehicle. Background Technology
[0002] The motor of the power steering system includes a magnetic assembly, which works in conjunction with a detection element in the motor controller to determine the rotation angle of the motor shaft. In related technologies, the magnetic assembly includes a magnetic component and a shaft. If the assembly structure of the magnetic component and shaft is not properly designed, the magnetic component is prone to misalignment in the axial and radial directions of the shaft. This can easily lead to improper assembly of the magnetic component or misalignment during operation, affecting the normal operation of the motor. Utility Model Content
[0003] This application aims to address at least one of the technical problems existing in the prior art or related technologies.
[0004] Therefore, the first aspect of this application proposes a magnetic component.
[0005] The second aspect of this application proposes an electric motor.
[0006] The third aspect of this application proposes an electric power steering system.
[0007] The fourth aspect of this application proposes a vehicle.
[0008] In view of this, this application provides a magnetic component, including: a shaft, the outer peripheral wall of the shaft having a first opening and a second opening, the shaft having a channel communicating with the first opening and the second opening; and an injection-molded magnetic component, the injection-molded magnetic component including a first magnetic part and a second magnetic part, the first magnetic part being disposed in the channel, the first magnetic part passing through the first opening and the second opening and being connected to the second magnetic part, the second magnetic part being sleeved on the shaft and covering the first opening and the second opening.
[0009] The magnetic components provided in this application include shafts and injection-molded magnetic parts.
[0010] The outer peripheral wall of the shaft has a first opening and a second opening, and the shaft body has a channel. The first end of the channel is connected to the first opening, and the second end of the channel is connected to the second opening. That is, the channel connects the first opening and the second opening.
[0011] Specifically, the shaft is placed in a tooling fixture, and an injection-molded magnetic component is formed on the shaft by injection molding. The injection-molded magnetic component includes a first magnetic part and a second magnetic part, which are connected. The first magnetic part is located in a channel, and the second magnetic part is sleeved on the shaft, covering both a first opening and a second opening.
[0012] It is understood that, along the extension direction of the channel, the first magnetic part has a first end and a second end. The first magnetic part is disposed in the channel. The first end of the first magnetic part is connected to the second magnetic part through a first opening, and the second end of the first magnetic part is connected to the second magnetic part through a second opening.
[0013] The first magnetic part, the second magnetic part, the first opening, the second opening, and the channel cooperate to effectively limit the mating dimensions of the shaft and the injection-molded magnetic part in the axial, radial, and circumferential directions of the shaft. This effectively limits the displacement of the injection-molded magnetic part in the axial, radial, and circumferential directions of the shaft, preventing the injection-molded magnetic part from separating from the shaft. This helps reduce the failure risk of motors including magnetic components and improves the yield rate of motors.
[0014] Meanwhile, the mating structure of the shaft and the injection-molded magnetic component eliminates the assembly process for both, thus simplifying the molding process and improving processing efficiency, which in turn reduces production costs. Furthermore, forming the injection-molded magnetic component on the shaft ensures dimensional accuracy and guarantees the mating dimensions between the magnetic assembly and the motor's detection components, providing reliable structural support for accurately detecting the shaft's rotation angle.
[0015] The magnetic component described above according to this application may also have the following additional technical features:
[0016] In some embodiments, the channel may extend radially along the shaft.
[0017] In this embodiment, the structure of the shaft is further defined.
[0018] Specifically, the channel extends radially along the shaft.
[0019] It is understandable that, along the axial direction of the shaft, the positions of the first opening and the second opening are at the same height. For example, along the axial direction of the shaft, the shaft has a third axial end face and a fourth axial end face that are arranged opposite each other, and the distance from the first opening to the third axial end face is equal to the distance from the second opening to the third axial end face.
[0020] This setting helps reduce the machining difficulty of the shaft, improves the machining efficiency of the shaft, and reduces the production cost of the product.
[0021] In this context, the cross-sectional area of the region enclosed by the walls of the first opening is equal to the cross-sectional area of the region enclosed by the walls of the second opening. Alternatively, the maximum distance between any two points on the walls of the first opening is equal to the maximum distance between any two points on the walls of the second opening.
[0022] Alternatively, the cross-sectional area of the region enclosed by the walls of the first opening is not equal to the cross-sectional area of the region enclosed by the walls of the second opening. In other words, the maximum distance between any two points on the walls of the first opening is not equal to the maximum distance between any two points on the walls of the second opening.
[0023] In some embodiments, optionally, the locations of the first opening and the second opening have a height difference along the axial direction of the shaft.
[0024] In this embodiment, the structure of the shaft is further defined.
[0025] Specifically, along the axial direction of the shaft, there is a height difference between the positions of the first opening and the second opening.
[0026] For example, the channel extends at an angle.
[0027] For example, the passageway bends and extends.
[0028] This design allows for an increase in the length of the channel, which in turn increases the volume of the portion of the injection-molded magnetic component located within the shaft, thereby improving the stability and reliability of the assembly between the shaft and the injection-molded magnetic component.
[0029] In some embodiments, optionally, there are multiple first openings, second openings, channels, and first magnetic parts, with each channel connecting a first opening and a second opening; each first magnetic part is disposed in a channel.
[0030] In this embodiment, the mating structure of the shaft and the injection-molded magnetic component is further defined.
[0031] Specifically, the outer peripheral wall of the shaft has multiple first openings and multiple second openings, and the shaft body has multiple channels. Each channel connects to one first opening and one second opening.
[0032] The injection-molded magnetic part includes a second magnetic part and a plurality of first magnetic parts, each of which is disposed in a channel, and any one of the plurality of first magnetic parts is connected to the second magnetic part.
[0033] This design increases the volume of the portion of the injection-molded magnetic component located within the shaft, thereby improving the stability and reliability of the assembly between the shaft and the injection-molded magnetic component.
[0034] In some embodiments, the second magnetic part may optionally be provided with a positioning groove.
[0035] In this embodiment, the structure of the injection-molded magnetic component is further defined.
[0036] Specifically, the second magnetic part is provided with a positioning groove. The positioning groove serves as a positioning reference to define the assembly dimensions of the magnetic assembly and other components of the motor.
[0037] Specifically, by providing a positioning groove in the second magnetic part, the positioning groove can ensure the fit dimensions between the injection-molded magnetic part and other components of the motor during the assembly process, so that the magnetic poles of the injection-molded magnetic part correspond to the specific installation angle of the motor, providing structural support for effectively detecting the rotation angle of the motor shaft.
[0038] In some embodiments, the second magnetic part may optionally include an identification groove; the injection-molded magnetic part is cross-sectioned along an axial direction perpendicular to the shaft, and in the cross-section, the area enclosed by the outline of the positioning groove is different from the area enclosed by the outline of the identification groove.
[0039] In this embodiment, the structure of the injection-molded magnetic component is further defined.
[0040] Specifically, the second magnetic part is also provided with an identification slot.
[0041] Different motor models have different surface magnetic strengths in their injection-molded magnetic components. Therefore, it is necessary to identify the surface magnetic strength of the injection-molded magnetic components for different magnetic assemblies. This is achieved by incorporating an identification slot in the second magnetic section to identify the surface magnetic strength of the injection-molded magnetic components, thus preventing confusion between components with different surface magnetic strengths and ensuring that the magnetic components can be effectively assembled into the designated motor. This design provides a foolproof function for the magnetic components, reducing assembly difficulty and guaranteeing a high yield rate for motor assembly.
[0042] It is understandable that the positioning slot and the identification slot have different functions.
[0043] In this case, a cross-section is taken of the injection-molded magnetic part along an axial direction perpendicular to the shaft. In this cross-section, the area enclosed by the contour line of the positioning groove differs from the area enclosed by the contour line of the identification groove. For example, when a cross-section is taken of the injection-molded magnetic part along an axial direction perpendicular to the shaft, the area enclosed by the contour line of the positioning groove is larger than the area enclosed by the contour line of the identification groove. Similarly, when a cross-section is taken of the injection-molded magnetic part along an axial direction perpendicular to the shaft, the area enclosed by the contour line of the positioning groove is smaller than the area enclosed by the contour line of the identification groove.
[0044] In this way, the operator can effectively identify the positioning slot and the identification slot, providing structural support for assembling magnetic components and for identifying the surface magnetic strength of injection-molded magnetic parts.
[0045] In some embodiments, optionally, the positioning groove passes through the first axial end face and the second axial end face of the second magnetic part; and / or the identification groove passes through the first axial end face and the second axial end face of the second magnetic part.
[0046] In this embodiment, the structure of the injection-molded magnetic component is further defined.
[0047] Specifically, along the axial direction of the shaft, the second magnetic part has a first axial end face and a second axial end face. The first axial end face and the second axial end face are arranged opposite to each other and spaced apart.
[0048] The positioning groove penetrates the first axial end face and the second axial end face of the second magnetic part, and / or the identification groove penetrates the first axial end face and the second axial end face of the second magnetic part.
[0049] This design simplifies the machining of positioning and / or identification slots, improves the machining efficiency of injection-molded magnetic parts, and consequently reduces product production costs.
[0050] In some embodiments, optionally, along the circumference of the shaft, the second magnetic part includes an N-pole segment and an S-pole segment, and the positioning groove is located at the connection between the N-pole segment and the S-pole segment.
[0051] In this embodiment, the structure of the injection-molded magnetic component is further defined.
[0052] The second magnetic section includes an N pole segment and an S pole segment.
[0053] The positioning groove is located at the connection between the N-pole segment and the S-pole segment. In other words, the position of the positioning groove is related to the positions of the N-pole segment and the S-pole segment.
[0054] This design ensures that the positioning groove guarantees the fit dimensions between the injection-molded magnetic component and other components of the motor during assembly, aligning the magnetic poles of the injection-molded magnetic component with the specific installation angle of the motor, thus providing structural support for effectively detecting the rotation angle of the motor shaft.
[0055] In some embodiments, optionally, the identification groove is located on one side of the connection between the N-pole segment and the S-pole segment along the circumferential direction of the shaft.
[0056] In this embodiment, the structure of the injection-molded magnetic component is further defined.
[0057] Specifically, the identification slot is located on one side of the connection between the N-pole segment and the S-pole segment. The location of the identification slot is used to determine the surface magnetic strength of the injection-molded magnetic component, thus avoiding confusion between injection-molded magnetic components with different surface magnetic strengths and ensuring that the magnetic assembly can be effectively assembled into the designated motor.
[0058] Additionally, along the circumference of the shaft, the identification slot is located on one side of the connection between the N-pole and S-pole sections. The positioning slot is located at the connection between the N-pole and S-pole sections. That is, the identification slot and the positioning slot are located in different positions, which prevents confusion between the two and serves as a foolproof mechanism.
[0059] In some embodiments, the first axial end face of the second magnetic part is provided with a protrusion, which is located between the shaft and the positioning groove.
[0060] In this embodiment, the structure of the injection-molded magnetic component is further defined.
[0061] Specifically, the first axial end face of the second magnetic part has a protrusion located between the shaft and the positioning groove. That is, a protrusion is provided on one side of the first axial end face of the second magnetic part. This protrusion is a magnetic injection gate boss. This design not only meets the usage requirements of injection molding of magnetic parts, but also ensures the dynamic balance of the magnetic assembly, guarantees the consistency of the surface magnetic strength of the injection molded magnetic parts, and helps improve the accuracy of the rotation angle of the detection shaft.
[0062] In some embodiments, optionally, the position height of the protrusion is located between the position height of the third axial end face of the shaft and the position height of the fourth axial end face of the shaft along the axial direction.
[0063] In this embodiment, the mating structure of the shaft and the injection-molded magnetic component is further defined.
[0064] Specifically, along the axial direction of the shaft, the height of the protrusion lies between the height of the third axial end face and the height of the fourth axial end face of the shaft. That is, the plane containing the third axial end face of the shaft is denoted as the first plane, and the plane containing the fourth axial end face of the shaft is denoted as the second end face.
[0065] The protrusion is located between the first plane and the second plane. That is, the protrusion does not protrude beyond the end face of the shaft. In this way, when the magnetic component is assembled with other components of the motor, the protrusion will not interfere with other components. While ensuring the dynamic balance of the magnetic component and the consistency of the surface magnetic strength of the injection-molded magnetic parts, the effectiveness and feasibility of motor assembly can be guaranteed.
[0066] In some embodiments, optionally, the second magnetic portion extends from the third axial end face of the shaft to the fourth axial end face of the shaft, and the second magnetic portion and the fourth axial end face are spaced apart; the second axial end face of the second magnetic portion is provided with an annular groove, and the annular groove is provided around the third axial end face.
[0067] In this embodiment, the mating structure of the shaft and the injection-molded magnetic component is further defined.
[0068] The second magnetic part extends from the third axial end face of the shaft to the fourth axial end face of the shaft, and the second magnetic part and the fourth axial end face are arranged at intervals. That is, the second axial end face of the second magnetic part and the third axial end face of the shaft are coplanar.
[0069] The second magnetic component has an annular groove on its second axial end face, which surrounds the third axial end face. The annular groove serves to avoid impacts. When the magnetic assembly is mounted on the motor shaft, the position of the annular groove ensures that external forces act effectively on the third axial end face of the shaft, rather than directly on the injection-molded magnetic component. This reduces the risk of the injection-molded magnetic component being crushed, thereby reducing the product scrap rate and improving the product yield.
[0070] The second aspect of this application provides an electric motor, comprising: a rotating shaft; and the magnetic component of the first aspect, wherein the shaft is connected to the rotating shaft.
[0071] The motor provided in this application includes the magnetic component as described in the first aspect, and therefore has all the beneficial effects of the aforementioned magnetic component, which will not be described in detail here.
[0072] A third aspect of this application proposes an electric power steering system, comprising: the motor described in the second aspect.
[0073] The electric power steering system provided in this application includes a motor as described in the second aspect, and therefore has all the beneficial effects of the aforementioned motor, which will not be described in detail here.
[0074] This application proposes a vehicle comprising: the electric motor as described in the second aspect; or the electric power steering system as described in the third aspect.
[0075] The vehicle provided in this application includes a motor as described in the second aspect or an electric power steering system as described in the third aspect, and therefore has all the beneficial effects of the aforementioned motor or electric power steering system, which will not be described in detail here.
[0076] It is worth noting that the vehicle can be a new energy vehicle. New energy vehicles include pure electric vehicles, range-extended electric vehicles, hybrid electric vehicles, fuel cell electric vehicles, and hydrogen engine vehicles.
[0077] The vehicles can also be gasoline-powered cars and hybrid cars.
[0078] Additional aspects and advantages of this application will become apparent in the following description or may be learned by practice of this application. Attached Figure Description
[0079] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:
[0080] Figure 1 A schematic diagram of the first part of the structure of a magnetic component according to an embodiment of this application is shown;
[0081] Figure 2A schematic diagram of the second part of the magnetic component according to an embodiment of this application is shown;
[0082] Figure 3 A first-view structural schematic diagram of a magnetic component according to an embodiment of this application is shown;
[0083] Figure 4 This invention provides a second-view structural schematic diagram of a magnetic component according to an embodiment of the present application.
[0084] Figure 5 A third-view structural schematic diagram of a magnetic component according to an embodiment of this application is shown;
[0085] Figure 6 A schematic diagram of the structure of the shaft according to the first embodiment of this application is shown;
[0086] Figure 7 A schematic diagram of the structure of the shaft according to the second embodiment of this application is shown;
[0087] Figure 8 A partial structural schematic diagram of a motor according to an embodiment of this application is shown.
[0088] in, Figures 1 to 8 The correspondence between the reference numerals and component names in the attached drawings is as follows:
[0089] 10 Magnetic component, 100 Shaft, 110 Outer peripheral wall of shaft, 112 First opening, 114 Second opening, 116 Third axial end face, 118 Fourth axial end face, 120 Channel, 200 Injection-molded magnetic part, 210 First magnetic part, 220 Second magnetic part, 221 First axial end face, 222 Second axial end face, 223 N pole segment, 224 S pole segment, 225 Protrusion, 226 Annular groove, 227 Connection between N pole segment and S pole segment, 230 Positioning groove, 240 Identification groove, 30 Motor, 300 Rotating shaft. Detailed Implementation
[0090] To better understand the above-mentioned objectives, features, and advantages of this application, the application will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.
[0091] Many specific details are set forth in the following description in order to provide a full understanding of this application. However, this application may also be implemented in other ways different from those described herein. Therefore, the scope of protection of this application is not limited to the specific embodiments disclosed below.
[0092] The following reference Figures 1 to 8Magnetic component 10, motor 30, electric power steering system and vehicle according to some embodiments of this application.
[0093] like Figure 1 , Figure 2 , Figure 3 , Figure 6 and Figure 7 As shown, a magnetic component 10 according to some embodiments of this application includes a shaft 100 and an injection-molded magnetic component 200.
[0094] The outer peripheral wall 110 of the shaft is provided with a first opening 112 and a second opening 114.
[0095] The shaft 100 has a channel 120 inside.
[0096] Channel 120 connects the first opening 112 and the second opening 114.
[0097] The injection-molded magnetic part 200 includes a first magnetic part 210 and a second magnetic part 220.
[0098] The first magnetic part 210 is provided in the channel 120.
[0099] The first magnetic part 210 passes through the first opening 112 and the second opening 114 and is connected to the second magnetic part 220.
[0100] The second magnetic part 220 is sleeved on the shaft 100, and the second magnetic part 220 covers the first opening 112 and the second opening 114.
[0101] The magnetic assembly 10 provided in this application includes a shaft 100 and an injection-molded magnetic component 200.
[0102] The outer peripheral wall 110 of the shaft body is provided with a first opening 112 and a second opening 114, and the shaft body 100 is provided with a channel 120. The first end of the channel 120 is connected to the first opening 112, and the second end of the channel 120 is connected to the second opening 114. That is, the channel 120 connects the first opening 112 and the second opening 114.
[0103] Specifically, the shaft 100 is placed in a tooling, and an injection-molded magnetic component 200 is formed on the shaft 100 by injection molding. The injection-molded magnetic component 200 includes a first magnetic part 210 and a second magnetic part 220, which are connected. The first magnetic part 210 is disposed in the channel 120, and the second magnetic part 220 is sleeved on the shaft 100, covering the first opening 112 and the second opening 114.
[0104] It is understood that, along the extending direction of the channel 120, the first magnetic part 210 has a first end and a second end. The first magnetic part 210 is disposed in the channel 120. The first end of the first magnetic part 210 is connected to the second magnetic part 220 through the first opening 112, and the second end of the first magnetic part 210 is connected to the second magnetic part 220 through the second opening 114.
[0105] The first magnetic part 210, the second magnetic part 220, the first opening 112, the second opening 114, and the channel 120 cooperate to effectively limit the mating dimensions of the shaft 100 and the injection-molded magnetic part 200 in the axial, radial, and circumferential directions of the shaft 100. This effectively limits the displacement of the injection-molded magnetic part 200 in the axial, radial, and circumferential directions of the shaft 100, preventing the injection-molded magnetic part 200 from separating from the shaft 100. This helps reduce the failure risk of the motor 30, which includes the magnetic assembly 10, and helps improve the yield rate of the motor 30.
[0106] Meanwhile, the mating structure of the shaft 100 and the injection-molded magnetic component 200 eliminates the assembly process of the shaft 100 and the injection-molded magnetic component 200, thus simplifying the molding process of the shaft 100 and the injection-molded magnetic component 200, which is beneficial to improving product processing efficiency and reducing product production costs. In addition, forming the injection-molded magnetic component 200 on the shaft 100 by injection molding can also ensure the dimensional accuracy of the product and ensure the mating dimensions of the magnetic component 10 and the detection component of the motor 30, providing reliable structural support for ensuring accurate detection of the rotation angle of the rotating shaft 300.
[0107] In some embodiments, the channel 120 may extend radially along the shaft 100.
[0108] In this embodiment, the structure of the shaft 100 is further defined.
[0109] Specifically, channel 120 extends radially along shaft 100.
[0110] It is understandable that, along the axial direction of the shaft 100, the positions of the first opening 112 and the second opening 114 are at the same height. For example, along the axial direction of the shaft 100, the shaft 100 has a third axial end face 116 and a fourth axial end face 118 that are arranged opposite to each other, and the distance from the first opening 112 to the fourth axial end face 118 is equal to the distance from the second opening 114 to the fourth axial end face 118.
[0111] This setting helps reduce the machining difficulty of shaft 100, improves the machining efficiency of shaft 100, and reduces the production cost of the product.
[0112] The cross-sectional area of the region enclosed by the mouth wall of the first opening 112 is equal to the cross-sectional area of the region enclosed by the mouth wall of the second opening 114. Alternatively, the maximum distance between any two points on the mouth wall of the first opening 112 is equal to the maximum distance between any two points on the mouth wall of the second opening 114.
[0113] Alternatively, the cross-sectional area of the region enclosed by the wall of the first opening 112 is not equal to the cross-sectional area of the region enclosed by the wall of the second opening 114. In other words, the maximum distance between any two points on the wall of the first opening 112 is not equal to the maximum distance between any two points on the wall of the second opening 114.
[0114] In some embodiments, optionally, the locations of the first opening 112 and the second opening 114 along the axial direction of the shaft 100 have a height difference.
[0115] In this embodiment, the structure of the shaft 100 is further defined.
[0116] Specifically, along the axial direction of the shaft 100, there is a height difference between the location of the first opening 112 and the location of the second opening 114.
[0117] For example, channel 120 extends at an angle.
[0118] For example, channel 120 extends in a curved manner and is arranged in an angular shape.
[0119] This arrangement helps to increase the length of the channel 120, which in turn increases the volume of the portion of the injection-molded magnetic component 200 located within the shaft 100, thereby improving the stability and reliability of the assembly between the shaft 100 and the injection-molded magnetic component 200.
[0120] Optionally, the first channel 120 includes a first sub-channel 120 and a second sub-channel 120. The first sub-channel 120 is connected to the first opening 112, and the second sub-channel 120 is connected to the first sub-channel 120 and the second opening 114. The included angle between the center line of the first sub-channel 120 and the center line of the second sub-channel 120 includes an acute angle, a right angle, or an obtuse angle.
[0121] In some embodiments, the number of the first opening 112, the second opening 114, the channel 120, and the first magnetic part 210 may be multiple.
[0122] Each channel 120 connects a first opening 112 and a second opening 114.
[0123] Each first magnetic part 210 is provided in a channel 120.
[0124] In this embodiment, the mating structure of the shaft 100 and the injection-molded magnetic component 200 is further defined.
[0125] Specifically, the outer peripheral wall 110 of the shaft is provided with a plurality of first openings 112 and a plurality of second openings 114, and the shaft 100 is provided with a plurality of channels 120. Each channel 120 connects to a first opening 112 and a second opening 114.
[0126] The injection-molded magnetic component 200 includes a second magnetic part 220 and a plurality of first magnetic parts 210. Each first magnetic part 210 is disposed in a channel 120, and any one of the plurality of first magnetic parts 210 is connected to the second magnetic part 220.
[0127] This design increases the volume of the portion of the injection-molded magnetic component 200 located within the shaft 100, thereby improving the stability and reliability of the assembly between the shaft 100 and the injection-molded magnetic component 200.
[0128] Optionally, the number of second magnetic parts 220 is one.
[0129] Optionally, the number of second magnetic sections 220 may be multiple.
[0130] "Multiple" here refers to two or more.
[0131] In some embodiments, optionally, such as Figure 1 , Figure 4 and Figure 5 As shown, the second magnetic part 220 is provided with a positioning groove 230.
[0132] In this embodiment, the structure of the injection-molded magnetic component 200 is further defined.
[0133] Specifically, the second magnetic part 220 is provided with a positioning groove 230. The positioning groove 230 serves as a positioning reference to define the assembly dimensions of the magnetic assembly 10 and other components of the motor 30.
[0134] Specifically, by providing a positioning groove 230 in the second magnetic part 220, the positioning groove 230 can ensure the fit dimensions between the injection-molded magnetic part 200 and other components of the motor 30 during the assembly process, so that the magnetic poles of the injection-molded magnetic part 200 correspond to the specific installation angle of the motor 30, providing structural support for effectively detecting the rotation angle of the shaft 300 of the motor 30.
[0135] In some embodiments, optionally, such as Figure 1 , Figure 4 and Figure 5 As shown, the second magnetic part 220 is also provided with an identification groove 240.
[0136] A cross-section of the injection-molded magnetic part 200 is made along the axial direction perpendicular to the shaft 100.
[0137] In the cross section, the area enclosed by the outline of the positioning groove 230 is different from the area enclosed by the outline of the identification groove 240.
[0138] In this embodiment, the structure of the injection-molded magnetic component 200 is further defined.
[0139] Specifically, the second magnetic part 220 is also provided with an identification groove 240.
[0140] Different models of motors 30 have different surface magnetic strengths of the injection-molded magnetic components 200. Therefore, it is necessary to identify the surface magnetic strength of the injection-molded magnetic components 200 of different magnetic components 10. By providing an identification groove 240 in the second magnetic part 220, the surface magnetic strength of the injection-molded magnetic component 200 can be identified, thus avoiding confusion between injection-molded magnetic components 200 with different surface magnetic strengths. This ensures that the magnetic component 10 can be effectively assembled into the designated motor 30. This design gives the magnetic component 10 a foolproof function, which helps to reduce the assembly difficulty of the magnetic component 10 and ensures a high yield rate for motor 30 assembly.
[0141] It is understandable that the positioning slot 230 and the identification slot 240 have different functions.
[0142] Specifically, when a cross-section is taken of the injection-molded magnetic component 200 along an axial direction perpendicular to the shaft 100, the area enclosed by the contour line of the positioning groove 230 differs from the area enclosed by the contour line of the identification groove 240. For example, when a cross-section is taken of the injection-molded magnetic component 200 along an axial direction perpendicular to the shaft 100, the area enclosed by the contour line of the positioning groove 230 is larger than the area enclosed by the contour line of the identification groove 240. Similarly, when a cross-section is taken of the injection-molded magnetic component 200 along an axial direction perpendicular to the shaft 100, the area enclosed by the contour line of the positioning groove 230 is smaller than the area enclosed by the contour line of the identification groove 240.
[0143] In this way, the operator can effectively identify the positioning groove 230 and the identification groove 240, providing structural support for assembling the magnetic component 10 and for identifying the surface magnetic strength of the injection-molded magnetic part 200.
[0144] In this application, the injection-molded magnetic part 200 is cross-sectioned along an axial direction perpendicular to the shaft 100. In the cross-section, the area enclosed by the outline of the positioning groove 230 is larger than the area enclosed by the outline of the identification groove 240.
[0145] Optionally, the shape of the positioning groove 230 is the same as the shape of the identification groove 240.
[0146] Optionally, the shape of the positioning groove 230 may differ from the shape of the identification groove 240. For example, one may be a rectangular groove and the other an arc-shaped groove. Or, one may be a toothed groove and the other an arc-shaped groove. These are not all listed here.
[0147] In some embodiments, optionally, such as Figure 1 As shown, the positioning groove 230 penetrates the first axial end face 221 and the second axial end face 222 of the second magnetic part 220.
[0148] And / or the identification groove 240 passes through the first axial end face 221 and the second axial end face 222 of the second magnetic part 220.
[0149] In this embodiment, the structure of the injection-molded magnetic component 200 is further defined.
[0150] Specifically, along the axial direction of the shaft 100, the second magnetic part 220 has a first axial end face 221 and a second axial end face 222. The first axial end face 221 and the second axial end face 222 are arranged opposite to each other and spaced apart.
[0151] The positioning groove 230 penetrates the first axial end face 221 and the second axial end face 222 of the second magnetic part 220, and / or the identification groove 240 penetrates the first axial end face 221 and the second axial end face 222 of the second magnetic part 220.
[0152] This arrangement simplifies the machining of the positioning groove 230 and / or the identification groove 240, improves the machining efficiency of the injection-molded magnetic part 200, and thus helps reduce the production cost of the product.
[0153] In some other embodiments, the positioning groove 230 extends from the first axial end face 221 to the second axial end face 222, and the positioning groove 230 and the second axial end face 222 are arranged at intervals. Alternatively, the positioning groove 230 extends from the second axial end face 222 to the first axial end face 221, and the positioning groove 230 and the first axial end face 221 are arranged at intervals.
[0154] In some other embodiments, the positioning groove 230 is located between the first axial end face 221 and the second axial end face 222.
[0155] In some other embodiments, the identification groove 240 extends from the first axial end face 221 to the second axial end face 222, and the identification groove 240 and the second axial end face 222 are arranged at intervals. Alternatively, the identification groove 240 extends from the second axial end face 222 to the first axial end face 221, and the identification groove 240 and the first axial end face 221 are arranged at intervals.
[0156] In some other embodiments, the identification groove 240 is located between the first axial end face 221 and the second axial end face 222.
[0157] In some embodiments, optionally, such as Figure 4 As shown, along the circumference of the shaft 100, the second magnetic part 220 includes an N pole section 223 and an S pole section 224.
[0158] The positioning groove 230 is located at the connection point 227 between the N-pole segment and the S-pole segment.
[0159] In this embodiment, the structure of the injection-molded magnetic component 200 is further defined.
[0160] The second magnetic section 220 includes an N pole section 223 and an S pole section 224.
[0161] The positioning groove 230 is located at the connection point 227 between the N-pole segment and the S-pole segment. That is, the position of the positioning groove 230 is related to the positions of the N-pole segment 223 and the S-pole segment 224.
[0162] Figure 4 The dashed line in the figure is the dividing line between the N-pole segment 223 and the S-pole segment 224, that is, the connection point 227 between the N-pole segment and the S-pole segment.
[0163] This configuration ensures that the positioning groove 230 can guarantee the fit dimensions between the injection-molded magnetic part 200 and other components of the motor 30 during assembly, so that the magnetic poles of the injection-molded magnetic part 200 correspond to the specific installation angle of the motor 30, providing structural support for effectively detecting the rotation angle of the shaft 300 of the motor 30.
[0164] In some embodiments, optionally, such as Figure 4 As shown, along the circumference of the shaft 100, the identification groove 240 is located on one side of the connection 227 between the N pole segment and the S pole segment.
[0165] In this embodiment, the structure of the injection-molded magnetic component 200 is further defined.
[0166] Specifically, the identification slot 240 is located on one side of the connection 227 between the N-pole segment and the S-pole segment. The location of the identification slot 240 corresponds to the magnetic strength of the injection-molded magnetic component 200, so as to avoid confusion between injection-molded magnetic components 200 with different magnetic strengths, and to ensure that the magnetic assembly 10 can be effectively assembled into the designated motor 30.
[0167] Additionally, along the circumference of the shaft 100, the identification groove 240 is located on one side of the connection 227 between the N-pole segment and the S-pole segment. The positioning groove 230 is located at the connection 227 between the N-pole segment and the S-pole segment. That is, the identification groove 240 and the positioning groove 230 are positioned differently, so that the identification groove 240 and the positioning groove 230 will not be confused, thus serving as a foolproof mechanism.
[0168] In some other embodiments, the identification slot 240 is located at the junction 227 of the N-pole segment and the S-pole segment.
[0169] In some embodiments, optionally, such as Figure 1 As shown, the first axial end face 221 of the second magnetic part 220 is provided with a protrusion 225.
[0170] The protrusion 225 is located between the shaft 100 and the positioning groove 230.
[0171] In this embodiment, the structure of the injection-molded magnetic component 200 is further defined.
[0172] Specifically, the first axial end face 221 of the second magnetic part 220 is provided with a protrusion 225, which is located between the shaft 100 and the positioning groove 230. That is, the first axial end face 221 of the second magnetic part 220 on one side is provided with a protrusion 225. This protrusion 225 is an injection molding magnetic gate boss. This arrangement can not only meet the usage requirements of injection molding to form the injection-molded magnetic part 200, but also ensure the dynamic balance of the magnetic assembly 10, and ensure the consistency of the surface magnetic strength of the injection-molded magnetic part 200, which is beneficial to improving the accuracy of the rotation angle of the detection shaft 300.
[0173] In some embodiments, optionally, such as Figure 1 As shown, along the axial direction of the shaft 100, the height of the protrusion 225 is located between the height of the third axial end face 116 of the shaft 100 and the height of the fourth axial end face 118 of the shaft 100.
[0174] In this embodiment, the mating structure of the shaft 100 and the injection-molded magnetic component 200 is further defined.
[0175] Specifically, along the axial direction of the shaft 100, the height of the protrusion 225 is located between the height of the third axial end face 116 and the height of the fourth axial end face 118 of the shaft 100. That is, the plane containing the third axial end face 116 of the shaft 100 is denoted as the first plane, and the plane containing the fourth axial end face 118 of the shaft 100 is denoted as the second end face.
[0176] The protrusion 225 is located between the first plane and the second plane. That is, the protrusion 225 does not protrude beyond the end face of the shaft 100. In this way, when the magnetic component 10 is assembled with other components of the motor 30, the protrusion 225 will not interfere with other components. While ensuring the dynamic balance of the magnetic component 10 and the consistency of the surface magnetic strength of the injection-molded magnetic part 200, the effectiveness and feasibility of assembling the motor 30 can be guaranteed.
[0177] In some embodiments, optionally, such as Figure 1 , Figure 2 , Figure 3 and Figure 4As shown, the second magnetic part 220 extends from the third axial end face 116 of the shaft body 100 to the fourth axial end face 118 of the shaft body 100.
[0178] Furthermore, the second magnetic part 220 and the fourth axial end face 118 are arranged at intervals.
[0179] The second axial end face 222 of the second magnetic part 220 is provided with an annular groove 226, which surrounds the third axial end face 116.
[0180] In this embodiment, the mating structure of the shaft 100 and the injection-molded magnetic component 200 is further defined.
[0181] The second magnetic part 220 extends from the third axial end face 116 of the shaft 100 to the fourth axial end face 118 of the shaft 100, and the second magnetic part 220 and the fourth axial end face 118 are arranged at intervals. That is, the second axial end face 222 of the second magnetic part 220 and the third axial end face 116 of the shaft 100 are coplanar.
[0182] The second axial end face 222 of the second magnetic part 220 is provided with an annular groove 226, which surrounds the third axial end face 116. The annular groove 226 serves to avoid impacts. When the magnetic assembly 10 is assembled onto the rotating shaft 300 of the motor 30, the position of the annular groove 226 allows external forces to effectively act on the third axial end face 116 of the shaft 100, rather than directly on the injection-molded magnetic part 200. This reduces the risk of the injection-molded magnetic part 200 being crushed, thereby reducing the scrap rate and improving the yield rate.
[0183] like Figure 8 As shown, a motor 30 according to some embodiments of this application includes: a rotating shaft 300; and a magnetic component 10 as described in any of the above embodiments, wherein the shaft 100 is connected to the rotating shaft 300.
[0184] The motor 30 provided in this application includes the magnetic component 10 as described in any of the above embodiments, and therefore has all the beneficial effects of the magnetic component 10, which will not be described in detail here.
[0185] An electric power steering system according to some embodiments of this application includes: the motor 30 in the above embodiments.
[0186] The electric power steering system provided in this application includes the motor 30 as described in the above embodiments, and therefore has all the beneficial effects of the motor 30, which will not be described in detail here.
[0187] A vehicle according to some embodiments of the present application includes: the motor 30 in the above embodiments; or the electric power steering system in the above embodiments.
[0188] The vehicle provided in this application includes the motor 30 as described in the above embodiments or the electric power steering system as described in the above embodiments. Therefore, it has all the beneficial effects of the motor 30 or the electric power steering system, which will not be described in detail here.
[0189] It is worth noting that the vehicle can be a new energy vehicle. New energy vehicles include pure electric vehicles, range-extended electric vehicles, hybrid electric vehicles, fuel cell electric vehicles, and hydrogen engine vehicles.
[0190] The vehicles can also be gasoline-powered cars and hybrid cars.
[0191] Optionally, this application provides a magnetic component 10, which is used by the controller of the power supply motor 30 to determine the rotation angle of the shaft 300. This reduces the risk of the injection-molded magnetic component 200 detaching from the shaft 100 in the axial and radial directions, reduces the risk of the controller failing to sense the injection-molded magnetic component 200, and reduces the risk of motor 30 failure.
[0192] The shaft 100 is encased in an injection-molded magnetic component 200. The surface of the shaft 100 encased in the injection-molded magnetic component 200 has a first opening 112 and a second opening 114. The shaft 100 has a channel 120 inside, which connects the first opening 112 and the second opening 114.
[0193] This configuration limits the axial and radial displacement of the injection-molded magnetic component 200 within the shaft 100. This configuration reduces the number of machining steps required for the magnetic assembly 10, thereby lowering its production cost.
[0194] The first magnetic part 210 of the injection-molded magnetic component 200 passes directly through the shaft 100, which can effectively reduce the axial and radial displacement of the injection-molded magnetic component 200 on the shaft 100, reduce the risk of the injection-molded magnetic component 200 falling off, reduce the failure risk of the motor 30, and help improve the product qualification rate.
[0195] The injection-molded magnetic component 200 has a positioning groove 230 and an identification groove 240 on its side. The identification groove 240 is located on one side of the connection between the N pole section 223 and the S pole section 224 of the second magnetic part 220. The positioning groove 230 ensures the fit dimensions between the injection-molded magnetic component 200 and other components of the motor 30 during assembly, so that the magnetic poles of the injection-molded magnetic component 200 correspond to the specific mounting angle of the motor 30, providing structural support for effectively detecting the rotation angle of the shaft 300 of the motor 30.
[0196] Since the requirements for the surface magnetic strength of the injection-molded magnetic parts 200 vary, it is necessary to identify the surface magnetic strength of different injection-molded magnetic parts 200. By providing an identification groove 240 in the second magnetic part 220, the identification groove 240 can avoid mixing up the surface magnetic strength of the injection-molded magnetic parts 200 and reduce waste caused by mixing materials.
[0197] The second axial end face 222 of the second magnetic part 220 is flush with the third axial end face 116 of the shaft body 100, and the second axial end face 222 of the second magnetic part 220 is provided with an annular groove 226, which surrounds the third axial end face 116 of the shaft body 100. When assembling the magnetic assembly 10, the annular groove 226 can ensure that external forces will not directly act on the second axial end face 222 of the injection-molded magnetic part 200, reducing the risk of the injection-molded magnetic part 200 being crushed, reducing the scrap rate of the product, and improving the assembly efficiency of the product.
[0198] The first axial end face 221 of the second magnetic part 220 is provided with a protrusion 225, which is located between the shaft 100 and the positioning groove 230. This arrangement can ensure the dynamic balance of the magnetic assembly 10 and the consistency of the surface magnetic strength of the injection-molded magnetic part 200, which is beneficial to improving the accuracy of detecting the rotation angle of the rotating shaft 300.
[0199] The magnetic assembly 10 provided in this application includes a shaft 100 and an injection-molded magnetic component 200.
[0200] The outer peripheral wall 110 of the shaft body is provided with a first opening 112 and a second opening 114, and the shaft body 100 is provided with a channel 120. The first end of the channel 120 is connected to the first opening 112, and the second end of the channel 120 is connected to the second opening 114. That is, the channel 120 connects the first opening 112 and the second opening 114.
[0201] Specifically, the shaft 100 is placed in a tooling, and an injection-molded magnetic component 200 is formed on the shaft 100 by injection molding. The injection-molded magnetic component 200 includes a first magnetic part 210 and a second magnetic part 220, which are connected. The first magnetic part 210 is disposed in the channel 120, and the second magnetic part 220 is sleeved on the shaft 100, covering the first opening 112 and the second opening 114.
[0202] It is understood that, along the extending direction of the channel 120, the first magnetic part 210 has a first end and a second end. The first magnetic part 210 is disposed in the channel 120. The first end of the first magnetic part 210 is connected to the second magnetic part 220 through the first opening 112, and the second end of the first magnetic part 210 is connected to the second magnetic part 220 through the second opening 114.
[0203] The first magnetic part 210, the second magnetic part 220, the first opening 112, the second opening 114, and the channel 120 cooperate to effectively limit the mating dimensions of the shaft 100 and the injection-molded magnetic part 200 in the axial, radial, and circumferential directions of the shaft 100. This effectively limits the displacement of the injection-molded magnetic part 200 in the axial, radial, and circumferential directions of the shaft 100, preventing the injection-molded magnetic part 200 from separating from the shaft 100. This helps reduce the failure risk of the motor 30, which includes the magnetic assembly 10, and helps improve the yield rate of the motor 30.
[0204] Meanwhile, the mating structure of the shaft 100 and the injection-molded magnetic component 200 eliminates the assembly process of the shaft 100 and the injection-molded magnetic component 200, thus simplifying the molding process of the shaft 100 and the injection-molded magnetic component 200, which is beneficial to improving product processing efficiency and reducing product production costs. In addition, forming the injection-molded magnetic component 200 on the shaft 100 by injection molding can also ensure the dimensional accuracy of the product and ensure the mating dimensions of the magnetic component 10 and the detection component of the motor 30, providing reliable structural support for ensuring accurate detection of the rotation angle of the rotating shaft 300.
[0205] In this application, the term "multiple" refers to two or more unless otherwise expressly defined. The terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; "linking" can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.
[0206] In the description of this specification, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. The above descriptions are merely preferred embodiments of this application and are not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.
Claims
1. A magnetic assembly, characterized by include: A shaft body, wherein the outer peripheral wall of the shaft body is provided with a first opening and a second opening, and the shaft body is provided with a channel that connects the first opening and the second opening; The injection-molded magnetic component includes a first magnetic part and a second magnetic part. The first magnetic part is disposed in the channel, passes through the first opening and the second opening, and is connected to the second magnetic part. The second magnetic part is sleeved on the shaft and covers the first opening and the second opening.
2. The magnetic assembly of claim 1, wherein, The channel extends radially along the shaft; or Along the axial direction of the shaft, the positions of the first opening and the second opening have a height difference.
3. The magnetic assembly of claim 1 or 2, wherein, There are multiple first openings, second openings, channels, and first magnetic parts, and each channel connects to one first opening and one second opening; Each of the first magnetic parts is disposed in one of the channels.
4. The magnetic assembly of claim 1 or 2, wherein, The second magnetic part is provided with a positioning groove.
5. The magnetic assembly of claim 4, wherein, The second magnetic part is also provided with an identification groove; A cross-section is taken of the injection-molded magnetic part along an axial direction perpendicular to the shaft. In the cross-section, the area enclosed by the outline of the positioning groove is different from the area enclosed by the outline of the identification groove.
6. The magnetic assembly of claim 5, wherein, The positioning groove penetrates through the first axial end face and the second axial end face of the second magnetic part; and / or The identification groove penetrates through the first axial end face and the second axial end face of the second magnetic part.
7. The magnetic assembly of claim 5, wherein, Along the circumference of the shaft, the second magnetic part includes an N pole segment and an S pole segment, and the positioning groove is located at the connection between the N pole segment and the S pole segment.
8. The magnetic assembly of claim 7, wherein, Along the circumference of the shaft, the identification groove is located on one side of the connection between the N-pole segment and the S-pole segment.
9. The magnetic assembly of claim 4, wherein, The first axial end face of the second magnetic part is provided with a protrusion, which is located between the shaft and the positioning groove.
10. The magnetic assembly of claim 9, wherein, Along the axial direction of the shaft, the position height of the protrusion is located between the position height of the third axial end face of the shaft and the position height of the fourth axial end face of the shaft.
11. The magnetic assembly of claim 1 or 2, wherein, The second magnetic part extends from the third axial end face of the shaft to the fourth axial end face of the shaft, and the second magnetic part is arranged at a distance from the fourth axial end face; The second axial end face of the second magnetic part is provided with an annular groove, which surrounds the third axial end face.
12. An electric motor, characterized in that, include: Shaft; and The magnetic component as described in any one of claims 1 to 11, wherein the shaft is connected to the rotating shaft.
13. An electric power assisted steering system characterised in that, include: The motor as described in claim 12.
14. A vehicle characterized by comprising: include: The motor as described in claim 12; or The electric power steering system as described in claim 13.