Motor magnet adjusting ring

Abstract

The utility model discloses a motor magnetic adjusting ring, including front and rear side by side's front end ring and rear end ring and the circumferential alternation distribution's magnetic separation strip and magnetic adjusting core. Magnetic separation strip is located between two end rings, and magnetic adjusting core is fixed between the adjacent magnetic separation strip, and its front and rear ends are equipped with front, rear insulating ring piece respectively. The second perforation and fourth perforation of circumferential distribution are equipped on front, rear insulating ring piece respectively, and the both ends of magnetic separation strip pass through corresponding perforation and are fixed with front end ring and rear end ring. The utility model constructs frame transmission torque through magnetic separation strip and end ring, and strengthens structural strength, utilizes magnetic separation strip positioning magnetic adjusting core and helps insulating ring piece to press tightly, ensures uniform air gap, and magnetic separation strip and insulating ring piece form magnetic insulation system together, effectively block the eddy current path, reduce the loss, thereby promote motor efficiency and reliability.

Description

Technical Field

[0001] This utility model relates to the field of motor technology, and more specifically, to a motor adjusting magnetic ring. Background Technology

[0002] As a high-performance electromagnetic device that deeply integrates magnetic gear technology with motor principles, the magnetic gear composite motor exhibits significant advantages such as compact structure, high transmission efficiency, high power density, and strong reliability, demonstrating enormous application potential in high-end fields such as new energy vehicles, wind power generation, industrial servo systems, and aerospace. In this type of motor, the adjusting magnetic ring is the core component for achieving magnetic field modulation and torque transmission, and its performance directly determines the overall efficiency of the motor. Especially for structures using the adjusting magnetic ring as the power output, the adjusting magnetic ring must withstand extremely high torque loads, making its mechanical structural strength and reliability the primary design challenge. Furthermore, since the magnetic gear composite motor typically consists of three coaxially nested components—a magnetic stator, an adjusting magnetic ring, and an inner rotor—the adjusting magnetic ring must simultaneously cooperate with both the inner and outer components, forming two layers of working air gaps. The uniformity of these two air gaps is crucial for the coupling efficiency of the magnetic field, the smoothness of torque output, and the suppression of vibration and noise, and is key to ensuring high-quality motor operation.

[0003] In existing technologies, such as the motor rotor core structure disclosed in Chinese Patent Publication No. CN219067953U, bolts are used to fasten the rotor, magnetic strips, and magnetic pole core in sequence, supplemented by limiting plates and limiting protrusions to achieve radial and circumferential positioning of each component. Although this type of structure simplifies assembly to some extent, it still has several inherent defects. First, this structure relies on a single axial bolt to provide clamping force to resist circumferential torque. When subjected to large torque, especially impact loads, the bolt connection is prone to becoming a weak point in mechanical strength, and loosening is possible. There is a risk of fatigue fracture; secondly, the through-hole metal bolt itself may form a conductive path, which is prone to eddy current loss in high-frequency alternating magnetic field, resulting in local heating and reduced efficiency, which contradicts the fundamental requirement of magnetic isolation performance of the magnetic tuning link; furthermore, the structure lacks an effective insulation isolation design between the end of the magnetic core (i.e., the magnetic pole core in the patent) and the rotor end face, and cannot completely block the axial eddy current path; in addition, the assembly accuracy and part form and position tolerance control of such structures are still quite challenging, and it is difficult to maintain the best uniformity of the inner and outer air gaps for a long time under complex stress conditions. Utility Model Content

[0004] The purpose of this invention is to overcome the defects in the prior art and provide a motor adjusting ring with high structural strength, effective suppression of eddy currents, and guaranteed uniformity of internal and external air gaps.

[0005] To solve the above problems, this utility model provides a motor magnetic adjustment ring, including a front ring and a rear ring arranged side by side, and magnetic isolation strips and a magnetic adjustment core circumferentially and alternately distributed between the two. The magnetic isolation strips are disposed between the front ring and the rear ring, and the left and right ends of the magnetic adjustment core are fixed between an adjacent pair of magnetic isolation strips. A front insulating ring is provided between the front end of the magnetic adjustment core and the front ring, and a rear insulating ring is provided between the rear end of the magnetic adjustment core and the rear ring. The front insulating ring is provided with a plurality of second through holes circumferentially distributed, and the rear insulating ring is provided with a plurality of fourth through holes circumferentially distributed. The front end of the magnetic isolation strip passes through the second through holes and is fixed to the front ring, and the rear end of the magnetic isolation strip passes through the fourth through holes and is fixed to the rear ring.

[0006] Compared with the prior art, the advantages of this invention are as follows: By directly fixing the magnetic shielding strip between the front and rear end rings and using it to clamp and fix the adjusting magnetic core, a stable and reliable frame structure is constructed. This structure effectively transmits the torque it bears to the entire end ring through the magnetic shielding strip, avoiding the stress concentration and loosening risks that may occur with traditional bolt connections, thereby significantly improving the overall structural strength and torque bearing capacity. At the same time, the adjusting magnetic core is circumferentially positioned by the magnetic shielding strips on both sides and axially pressed by the front and rear end rings through insulating ring plates. This positioning and fixing method effectively ensures the consistency of the circumferential distribution and axial position of all adjusting magnetic cores, providing a solid structural foundation for maintaining the uniformity of the air gap between the inner and outer layers. In addition, the setting of the front and rear insulating ring plates forms a reliable insulation barrier between the adjusting magnetic core and the end ring. Combined with the magnetic shielding strip, which is non-magnetic and non-conductive, it together constructs a complete magnetic shielding and insulation system, which can completely block the eddy current path, minimize eddy current losses, and improve the operating efficiency and reliability of the motor.

[0007] Specifically, the front insulating ring, magnetic shielding strip, and rear insulating ring are sequentially fixed between the front and rear rings using fixing bolts. The front ring has multiple first through holes distributed circumferentially, and each magnetic shielding strip has a third through hole extending from front to back. The rear ring has multiple fifth through holes distributed circumferentially. The first through holes are threaded holes, and the front end of the fixing bolt is threaded. The bolt shank passes through the fifth, fourth, third, second, and first through holes sequentially from back to front, and is threaded into the first through hole. This technical solution uses a single fixing bolt to sequentially pass through the rear ring, rear insulating ring, magnetic shielding strip, and front insulating ring, finally locking it with the threaded hole of the front ring, connecting the core components into a single unit and forming a clear axial force transmission path. This design not only has a compact structure and reliable axial clamping force, ensuring the stability of the connection between components to cope with torque loads, but also enables rapid and synchronous assembly and disassembly of all involved components, significantly improving product maintainability and assembly efficiency.

[0008] As an improvement, the front and rear ends of the magnetic shielding strip extend forward and backward respectively to form a front insertion part and a rear insertion part. The rear end of the front ring has a front slot for the front insertion part to be inserted, and the front slot is coaxially arranged with the first through hole; the front end of the rear ring has a rear slot for the rear insertion part to be inserted, and the rear slot is coaxially arranged with the fifth through hole. This technical solution provides precise radial and circumferential initial positioning for the installation of the magnetic shielding strip by setting insertion parts at both ends of the magnetic shielding strip and correspondingly opening slots on the front and rear rings. This design ensures that the holes of the magnetic shielding strip and the end ring are automatically aligned before the bolts are tightened, effectively preventing misalignment during assembly, simplifying the assembly process, and thus greatly improving assembly efficiency and positioning accuracy, laying a good foundation for the roundness and air gap uniformity of the entire magnetic adjustment ring.

[0009] As an improvement, the rear end of the rear ring is provided with a countersunk hole for accommodating the head of the fixing bolt. The countersunk hole is coaxial with the fifth through hole, and the diameter of the countersunk hole is larger than the diameter of the fifth through hole. In this technical solution, the countersunk hole provides a dedicated space for accommodating the head of the fixing bolt; during assembly, the bolt head can be completely recessed into the groove of the rear end ring, so that the outer surface of the bolt head does not protrude from the rear end face of the rear end ring, thereby achieving a flat end face design.

[0010] As an improvement, the rear end ring has multiple radially extending honeycomb holes on its circumference, distributed circumferentially between two adjacent fifth perforations. This technical solution, by setting honeycomb holes circumferentially on the rear end ring, effectively removes excess material while ensuring structural strength, significantly reducing the overall mass of the rear end ring. This achieves lightweighting of the entire motor magnetic adjusting ring, helps reduce the motor's moment of inertia, and thus has a positive impact on improving the motor's dynamic response performance and reducing operating energy consumption.

[0011] Specifically, each magnetic shielding strip has a left and right locking slot distributed front to back at its left and right ends, respectively, and each adjusting magnetic core has a left and right locking part distributed front to back at its left and right ends, respectively. In the assembled state, the left locking part of the adjusting magnetic core engages with the right locking slot of the adjacent magnetic shielding strip on the left, and the right locking part engages with the left locking slot of the adjacent magnetic shielding strip on the right. This technical solution utilizes the interplay between the locking slots on the magnetic shielding strips and the locking parts on the adjusting magnetic cores to form an efficient circumferential connection and positioning mechanism. This locking structure allows each adjusting magnetic core to be stably constrained between two adjacent magnetic shielding strips, forming a robust ring-shaped whole. This greatly enhances the circumferential structural rigidity and integrity of the adjusting magnetic ring assembly, effectively preventing displacement of components during operation. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is an exploded view of the present invention; Figure 3 This is a schematic diagram of the front end ring in this utility model; Figure 4 This is the first perspective view of the rear end ring in this utility model; Figure 5 This is the second perspective view of the rear end ring in this utility model; Figure 6 This is a schematic diagram of the front insulating ring in this utility model; Figure 7 This is a schematic diagram of the structure of the rear insulating ring in this utility model; Figure 8 This is a schematic diagram of the structure of the magnetic strip in this utility model; Figure 9 This is a schematic diagram of the structure of the adjusting magnet core in this utility model; Figure 10 This is an assembly diagram of the magnetic separator strip and the adjusting magnetic core in this utility model.

[0013] Explanation of reference numerals in the attached figures: 1. Front ring; 2. Rear ring; 21. Countersunk hole; 22. Honeycomb hole; 3. Magnetic strip; 31. Front insertion part; 32. Rear insertion part; 33. Left slot; 34. Right slot; 4. Adjusting magnetic core; 41. Left slot; 42. Right slot; 5. Front insulating ring; 6. Rear insulating ring; 7. Fixing bolt; 71. First through hole; 72. Second through hole; 73. Third through hole; 74. Fourth through hole; 75. Fifth through hole; 81. Front slot; 82. Rear slot. Detailed Implementation

[0014] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0015] like Figure 1 and Figure 2 As shown, a motor adjusting magnetic ring includes a front ring 1 and a rear ring 2 arranged side by side, and magnetic isolation strips 3 and adjusting magnetic cores 4 circumferentially alternately distributed between them. The magnetic isolation strips 3 are located between the front ring 1 and the rear ring 2. The left and right ends of the adjusting magnetic core 4 are fixed between an adjacent pair of magnetic isolation strips 3. A front insulating ring 5 is provided between the front end of the adjusting magnetic core 4 and the front ring 1, and a rear insulating ring 6 is provided between the rear end of the adjusting magnetic core 4 and the rear ring 2. The front insulating ring 5 is provided with a plurality of second through holes 72 circumferentially distributed, and the rear insulating ring 6 is provided with a plurality of fourth through holes 74 circumferentially distributed. The front end of the magnetic isolation strip 3 passes through the second through holes 72 and is fixed to the front ring 1, and the rear end of the magnetic isolation strip 3 passes through the fourth through holes 74 and is fixed to the rear ring 2.

[0016] This embodiment constructs a stable and reliable frame structure by directly fixing the magnetic shielding strip 3 between the front and rear end rings 2 and using it to clamp and fix the adjusting magnetic core 4. This structure effectively transmits the torque it bears to the entire end ring through the magnetic shielding strip 3, avoiding the stress concentration and loosening risks that may occur with traditional bolt connections, thereby significantly improving the overall structural strength and torque bearing capacity. At the same time, the adjusting magnetic core 4 is circumferentially positioned by the magnetic shielding strips 3 on both sides and axially pressed by the front and rear end rings 2 through insulating ring plates. This positioning and fixing method effectively ensures the consistency of the circumferential distribution and axial position of all adjusting magnetic cores 4, providing a solid structural foundation for maintaining the uniformity of the air gap between the inner and outer layers. In addition, the setting of the front insulating ring plate 5 and the rear insulating ring plate 6 forms a reliable insulating barrier between the adjusting magnetic core 4 and the end ring. Combined with the magnetic shielding strip 3, which is non-magnetic and non-conductive, it together constructs a complete magnetic shielding and insulation system, which can completely block the eddy current path, minimize eddy current losses, and improve the operating efficiency and reliability of the motor.

[0017] like Figures 1 to 8 As shown, the front insulating ring 5, the magnetic shielding strip 3, and the rear insulating ring 6 are sequentially fixed between the front end ring 1 and the rear end ring 2 by fixing bolts 7 in a front-to-back order. The front end ring 1 has multiple first through holes 71 distributed circumferentially, and each magnetic shielding strip 3 has a third through hole 73 extending from front to back. The rear end ring 2 has multiple fifth through holes 75 distributed circumferentially. The first through holes 71 are threaded holes. The front end of the fixing bolt 7 has threads, and the bolt 7 passes through the fifth through hole 75, the fourth through hole 74, the third through hole 73, the second through hole 72, and the first through hole 71 sequentially from back to front, and is threadedly connected to the first through hole 71. This technical solution uses a single fixing bolt 7 to sequentially pass through the rear end ring 2, the rear insulating ring 6, the magnetic shielding strip 3, and the front insulating ring 5, and finally locks into the threaded hole of the front end ring 1, connecting the core components into a whole and forming a clear axial force transmission path. This design is not only compact and has reliable axial clamping force, ensuring the stability of the connection between components to cope with torque loads, but also enables rapid and synchronous assembly and disassembly of all involved parts, significantly improving the maintainability and assembly efficiency of the product.

[0018] like Figure 2 , Figure 3 , Figure 4 and Figure 8As shown, the front and rear ends of the magnetic shielding strip 3 extend forward and backward respectively to form a front insertion part 31 and a rear insertion part 32. The front insertion part 31 passes forward through the second through hole 72 on the front insulating ring 5, and the rear insertion part 32 passes backward through the fourth through hole 74 on the rear insulating ring 6. The third through hole 73 on the magnetic shielding strip 3 passes forward through the front insertion part 31 and backward through the rear insertion part 32. The rear end of the front ring 1 is provided with a front slot 81 for the front insertion part 31 to be inserted. The front slot 81 is coaxially arranged with the first through hole 71. The front end of the rear ring 2 is provided with a rear slot 82 for the rear insertion part 32 to be inserted. The rear slot 82 is coaxially arranged with the fifth through hole 75. This technical solution provides precise radial and circumferential initial positioning for the installation of the magnetic stripe 3 by setting plug-in parts at both ends of the magnetic stripe 3 and correspondingly opening slots on the front and rear end rings 2. This design ensures that the holes of the magnetic stripe 3 and the end rings are automatically aligned before the bolts are tightened, effectively preventing misalignment during the assembly process, simplifying the assembly process, and thus greatly improving the assembly efficiency and positioning accuracy, laying a good foundation for the roundness and air gap uniformity of the entire magnetic ring.

[0019] like Figure 5 As shown, the rear end of the rear ring 2 is provided with a countersunk hole 21 for accommodating the head of the fixing bolt 7. The countersunk hole 21 is coaxially arranged with the fifth through hole 75, and the diameter of the countersunk hole 21 is larger than the diameter of the fifth through hole 75. In this technical solution, the countersunk hole 21 provides a dedicated accommodating space for the head of the fixing bolt 7; during assembly, the bolt head can be completely recessed into the groove of the rear ring 2, so that the outer surface of the bolt head does not protrude from the rear end face of the rear ring 2, thereby achieving a flat end face design.

[0020] like Figure 4 and Figure 5 As shown, the rear end ring 2 has multiple radially extending honeycomb holes 22 on its circumference, which are circumferentially distributed between two adjacent fifth through holes 75. This technical solution uses honeycomb holes 22 circumferentially on the rear end ring 2. These holes effectively remove excess material while ensuring structural strength, significantly reducing the overall mass of the rear end ring 2. This achieves lightweighting of the entire motor magnetic adjusting ring, helps reduce the motor's rotational inertia, and thus has a positive impact on improving the motor's dynamic response performance and reducing operating energy consumption.

[0021] like Figures 8 to 10As shown, each magnetic shielding strip 3 has a left slot 33 and a right slot 34 distributed front to back at its left and right ends, respectively. Each adjusting magnetic core 4 has a left engaging part 41 and a right engaging part 42 distributed front to back at its left and right ends, respectively. In the assembled state, the left engaging part 41 of the adjusting magnetic core 4 engages with the right slot 34 of the adjacent left magnetic shielding strip 3, and the right engaging part 42 of the adjusting magnetic core 4 engages with the left slot 33 of the adjacent right magnetic shielding strip 3. This technical solution utilizes the slots on the magnetic shielding strip 3 and the engaging parts on the adjusting magnetic core 4 to form an efficient circumferential connection and positioning mechanism. This engaging structure allows each adjusting magnetic core 4 to be stably constrained between two adjacent magnetic shielding strips 3, forming a solid ring-shaped whole. This greatly enhances the structural rigidity and integrity of the adjusting magnetic ring assembly in the circumferential direction and effectively prevents the components from shifting during operation.

[0022] Although the disclosure is as stated above, the scope of protection of this disclosure is not limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of this disclosure, and all such changes and modifications will fall within the protection scope of this utility model.

Claims

1. A motor adjusting magnetic ring, characterized in that, The device includes a front ring (1) and a rear ring (2) arranged side by side, and a magnetic shielding strip (3) and a magnetic core (4) that are circumferentially alternately distributed between them. The magnetic shielding strip (3) is located between the front ring (1) and the rear ring (2). The left and right ends of the magnetic core (4) are fixed between a pair of adjacent magnetic shielding strips (3). A front insulating ring (5) is provided between the front end of the magnetic core (4) and the front ring (1), and a rear insulating ring (6) is provided between the rear end of the magnetic core (4) and the rear ring (2). The front insulating ring (5) is provided with a plurality of second through holes (72) circumferentially distributed, and the rear insulating ring (6) is provided with a plurality of fourth through holes (74) circumferentially distributed. The front end of the magnetic shielding strip (3) passes through the second through hole (72) and is fixed to the front ring (1). The rear end of the magnetic shielding strip (3) passes through the fourth through hole (74) and is fixed to the rear ring (2).

2. The motor adjusting magnetic ring according to claim 1, characterized in that: The front insulating ring (5), the magnetic shielding strip (3), and the rear insulating ring (6) are fixed in sequence between the front end ring (1) and the rear end ring (2) by fixing bolts (7); the front end ring (1) is provided with a plurality of first through holes (71) distributed circumferentially, and each magnetic shielding strip (3) is provided with a third through hole (73) that runs through from front to back; the rear end ring (2) is provided with a plurality of fifth through holes (75) that run through from front to back, the first through hole (71) is a threaded hole, the front end of the rod of the fixing bolt (7) is threaded, and the rod of the fixing bolt (7) passes through the fifth through hole (75), the fourth through hole (74), the third through hole (73), the second through hole (72), and the first through hole (71) in sequence from back to front and is threadedly connected to the first through hole (71).

3. The motor adjusting ring according to claim 2, characterized in that: The front and rear ends of the magnetic strip (3) extend forward and backward respectively to form a front insertion part (31) and a rear insertion part (32). The rear end of the front end ring (1) is provided with a front slot (81) for the front insertion part (31) to be inserted. The front slot (81) is coaxially arranged with the first through hole (71). The front end of the rear end ring (2) is provided with a rear slot (82) for the rear insertion part (32) to be inserted. The rear slot (82) is coaxially arranged with the fifth through hole (75).

4. The motor adjusting ring according to claim 2, characterized in that: The rear end of the rear end ring (2) is provided with a countersunk hole (21) for accommodating the head of the fixing bolt (7). The countersunk hole (21) is coaxially arranged with the fifth through hole (75) and the diameter of the countersunk hole (21) is larger than the diameter of the fifth through hole (75).

5. The motor adjusting ring according to claim 2, characterized in that: The rear end ring (2) has a plurality of radially extending honeycomb holes (22) on its periphery, and the honeycomb holes (22) are circumferentially distributed between two adjacent fifth perforations (75).

6. The motor adjusting ring according to claim 1, characterized in that: Each of the magnetic shielding strips (3) has a left slot (33) and a right slot (34) distributed front to back at its left and right ends, respectively. Each of the adjusting magnetic cores (4) has a left snap-fit ​​part (41) and a right snap-fit ​​part (42) distributed front to back at its left and right ends, respectively. In the assembled state, the left snap-fit ​​part (41) of the adjusting magnetic core (4) snaps into the right slot (34) of the magnetic shielding strip (3) adjacent to the left, and the right snap-fit ​​part (42) of the adjusting magnetic core (4) snaps into the left slot (33) of the magnetic shielding strip (3) adjacent to the right.

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