Insulating ring structure of a hollow cup motor

Abstract

The utility model relates to insulating ring structure technical field, especially a kind of insulating ring structure of hollow cup motor, including main shaft and coil main body, the main shaft is fixedly connected with insulating sleeve pipe.The utility model has the advantages that: the structure is carried out preliminary positioning to wiring harness by embedding groove, then cooperate the locking action of modified epoxy resin layer, replaced the traditional only dependent on the bonding mode of resin insulating glue, greatly promote the stability of wiring harness and insulating connecting ring, commutator connection, avoid the loosening or displacement of wiring harness due to vibration, centrifugal force when hollow cup motor high-frequency operation.Improved epoxy resin layer not only fixed effect is more optimal, can also form more uniform, complete insulating layer, cover the gap between wiring harness and embedding groove, improve insulation performance, prevent the insulation failure caused by traditional resin glue layer aging, cracking, guarantee motor electrical safety, prolong the service life of motor, reduce the maintenance frequency caused by wiring problem simultaneously, reduce use cost.

Description

Technical Field

[0001] This utility model relates to the field of insulating ring structure technology, and in particular to an insulating ring structure for a hollow cup motor. Background Technology

[0002] The insulating ring structure of a coreless motor is a key component in the stator or rotor assembly, used for electrical insulation and structural support. It precisely engages the motor winding coils, commutator connecting plates, and other components. The insulating extension extends from the edge of the insulating ring body towards the winding or wiring area, forming a local insulation barrier and providing insulation protection for multiple parts. In terms of application, this insulating ring structure is crucial for the safe and stable operation of the coreless motor. Firstly, its core function is to achieve electrical insulation: a potential difference exists between the coreless motor winding coils and the commutator connecting plates, motor housing, and other metal components. The insulating ring structure blocks current flow between these components, preventing leakage and short-circuit faults caused by direct contact.

[0003] Currently, most coreless motors on the market have significant defects in the connection and insulation design between the winding coil and the commutator connecting plate. A prominent issue is their reliance on resin insulating adhesive, which results in poor stability and compromises insulation performance. In existing structures, the winding coil leads of coreless motors are fixed to the commutator connecting plate primarily by applying resin insulating adhesive—first, the coil leads are soldered to the terminals of the connecting plate, then resin insulating adhesive is applied to the soldered areas and the contact points between the coil and the connecting plate. After the adhesive layer cures, it both fixes the coil to the connecting plate and provides preliminary insulation. However, this connection method, relying solely on resin insulating adhesive, reveals serious stability problems during high-frequency operation and long-term use of coreless motors. Utility Model Content

[0004] The purpose of this invention is to at least solve one of the aforementioned technical defects.

[0005] Therefore, one objective of this utility model is to propose an insulating ring structure for a hollow cup motor to solve the problems mentioned in the background art and overcome the shortcomings of the prior art.

[0006] To achieve the above objectives, one embodiment of this utility model provides an insulating ring structure for a coreless motor, comprising a main shaft and a coil body. An insulating sleeve is fixedly connected to the main shaft, and an insulating connecting ring is fixedly connected to the outer surface of the insulating sleeve. The insulating connecting ring is bonded to the inner wall of the coil body with insulating adhesive. A first insulating support ring and a second insulating support ring are bonded to the top and bottom of the coil body with insulating adhesive. The centers of the first and second insulating support rings coincide with the axis of the main shaft. The first insulating support ring is fixedly connected to the insulating connecting ring. A plurality of circumferentially arrayed wiring harnesses are fixedly connected to the top of the coil body. A commutator is fixedly connected to the outer surface of the insulating sleeve, and all of the wiring harnesses are electrically connected to the commutator.

[0007] Preferably, in any of the above embodiments, the top surface of the second insulating support ring is fixedly connected with a plurality of circumferentially arrayed support bars, the top ends of the plurality of support bars are all bonded to the bottom surface of the first insulating support ring with insulating adhesive, the inner side of the support bars is bonded to the outer surface of the coil body with insulating adhesive, and the support bars, the first insulating support ring and the second insulating support ring are all made of polyimide resin.

[0008] Preferably, in any of the above embodiments, a retaining plate is fixedly connected to the top of each of the support bars, and several of the retaining plates are inserted into the bottom surface of the first insulating support ring.

[0009] Preferably, in any of the above embodiments, the top surface of the insulating connecting ring is provided with a plurality of circumferentially arrayed embedding grooves, and the wiring harness is located on the inner wall of the plurality of embedding grooves respectively.

[0010] Preferably, in any of the above embodiments, a modified epoxy resin layer is filled between the inner wall of the first insulating support ring and the top surface of the insulating connecting ring, and several of the wiring harnesses are locked inside the embedding groove by epoxy resin.

[0011] Preferably, in any of the above embodiments, the outer surface of the insulating sleeve is fixedly connected with a plurality of circumferentially arrayed stiffening plates, and the top of each of the stiffening plates is fixedly connected to an insulating connecting ring.

[0012] Compared with the prior art, the advantages and beneficial effects of this utility model are as follows: 1. When assembling this insulating ring structure, firstly, several wiring harnesses at the top of the coil body are placed into the inner walls of several embedded grooves on the top surface of the insulating connecting ring, ensuring precise alignment and electrical connection between the wiring harnesses and the commutator. Then, a modified epoxy resin layer is filled between the inner wall of the first insulating support ring and the top surface of the insulating connecting ring, covering the contact area between the wiring harnesses and the embedded grooves. After the modified epoxy resin layer cures, the wiring harnesses are locked inside the embedded grooves. Simultaneously, the top and bottom of the coil body are bonded to the first and second insulating support rings respectively using insulating adhesive. The top of the support strip on the top surface of the second insulating support ring is bonded to the bottom surface of the first insulating support ring using insulating adhesive, and the inner side of the support strip is bonded to the outer surface of the coil body, further fixing the position of the coil body and the insulating support rings. This structure uses an embedded groove for initial positioning of the wiring harness, combined with the locking effect of a modified epoxy resin layer. This replaces the traditional bonding method that relies solely on resin insulating adhesive, significantly improving the stability of the connection between the wiring harness and the insulating connecting ring and commutator. It prevents the wiring harness from loosening or shifting due to vibration and centrifugal force during high-frequency operation of the coreless motor. The modified epoxy resin layer not only provides superior fixation but also forms a more uniform and complete insulation layer, covering the gap between the wiring harness and the embedded groove. This improves insulation performance, prevents insulation failure caused by aging and cracking of traditional resin adhesive layers, ensures motor electrical safety, extends motor lifespan, and reduces maintenance frequency due to wiring issues, thus lowering operating costs.

[0013] 2. During assembly, first, the insulating sleeve is fixedly connected to the main shaft. Then, several circumferentially arranged stiffening plates are fixedly connected to the outer surface of the insulating sleeve. Next, the insulating connecting ring is fixedly connected to the top of the stiffening plates, so that the insulating connecting ring and the insulating sleeve form a stable connection through the stiffening plates. Afterward, the insulating connecting ring is glued to the inner wall of the coil body with insulating adhesive. The first insulating support ring is fixedly connected to the insulating connecting ring, and the second insulating support ring is connected to the first insulating support ring through a support strip and glued to the bottom end of the coil body, forming a complete support system. The stiffening plates on the outer surface of the insulating sleeve can effectively disperse the pressure and vibration impact force on the insulating connecting ring, enhance the connection strength between the insulating connecting ring and the insulating sleeve, and avoid the breakage or deformation of the connection part due to stress concentration caused by the direct bonding of the insulating connecting ring to the insulating sleeve in the traditional structure. The circumferential array distribution of the stiffening plates ensures uniform stress on the insulating connecting rings, further enhancing the overall structural stability. This ensures the insulating connecting rings remain coaxial with the main shaft during motor operation, preventing coil body displacement due to ring shifting, which could affect motor magnetic field stability and operating efficiency. Simultaneously, the support system formed by the first insulating support ring, the second insulating support ring, and the support strips provides comprehensive fixation of the coil body, reducing coil vibration and improving the overall smoothness and reliability of the coreless motor, making it suitable for high-frequency, high-precision operation. Attached Figure Description

[0014] Figure 1 This is a first-view structural diagram of the assembly of this utility model; Figure 2 This is a second-view structural diagram of the assembly of this utility model; Figure 3 This is an exploded structural diagram of the assembly of this utility model; Figure 4 This is a schematic diagram of the structure of the second insulating support ring of this utility model; Figure 5 This is a first-view structural schematic diagram of the insulating connecting ring of this utility model; Figure 6 This is a second-view structural schematic diagram of the insulating connecting ring of this utility model.

[0015] In the figure: 1-main shaft, 2-coil body, 3-insulating sleeve, 4-insulating connecting ring, 5-first insulating support ring, 6-second insulating support ring, 8-wiring harness, 9-commutator, 10-support bar, 11-card plate, 12-embedded groove, 13-modified epoxy resin layer, 14-stiffening plate. Detailed Implementation

[0016] The present invention will be further described below with reference to the accompanying drawings, but the scope of protection of the present invention is not limited thereto.

[0017] like Figures 1 to 6 As shown, an insulating ring structure for a hollow cup motor includes a main shaft 1 and a coil body 2. An insulating sleeve 3 is fixedly connected to the main shaft 1, and an insulating connecting ring 4 is fixedly connected to the outer surface of the insulating sleeve 3. The insulating connecting ring 4 is bonded to the inner wall of the coil body 2 with insulating adhesive. A first insulating support ring 5 and a second insulating support ring 6 are bonded to the top and bottom of the coil body 2 with insulating adhesive. The centers of the first insulating support ring 5 and the second insulating support ring 6 coincide with the axis of the main shaft 1. The first insulating support ring 5 and the insulating connecting ring 4 are fixedly connected. A plurality of circumferentially arrayed wiring harnesses 8 are fixedly connected to the top of the coil body 2. A commutator 9 is fixedly connected to the outer surface of the insulating sleeve 3, and the plurality of wiring harnesses 8 are electrically connected to the commutator 9.

[0018] As an optional technical solution of this utility model, a plurality of circumferentially arrayed support bars 10 are fixedly connected to the top surface of the second insulating support ring 6. The top ends of the support bars 10 are all bonded to the bottom surface of the first insulating support ring 5 with insulating adhesive. The inner side of the support bars 10 is bonded to the outer surface of the coil body 2 with insulating adhesive. The support bars 10, the first insulating support ring 5, and the second insulating support ring 6 are all made of polyimide resin. Polyimide resin has excellent insulation properties, is lightweight, and has high strength. The support bars 10 can form a stable support structure between the first and second insulating support rings, which not only enhances the connection stability between the two, but also further fixes the coil position by bonding to the outer surface of the coil body 2, preventing the coil from shifting during high-frequency operation of the motor, while ensuring overall insulation performance, thus meeting the lightweight and high stability requirements of coreless motors.

[0019] As an optional technical solution of this utility model, a locking plate 11 is fixedly connected to the top of each support bar 10, and several locking plates 11 are inserted into the bottom surface of the first insulating support ring 5. On the basis of the insulating adhesive bonding, it can provide additional mechanical fixation for the support bar 10 and the first insulating support ring 5, prevent the two from separating due to the aging of the adhesive layer, ensure the long-term stability of the support structure, and simplify the positioning process during assembly, so that the support bar 10 and the first insulating support ring 5 can be quickly and accurately connected, improving the assembly efficiency.

[0020] As an optional technical solution of this utility model, the top surface of the insulating connecting ring 4 is provided with a plurality of circumferentially arrayed embedding grooves 12. The wiring harness 8 is located on the inner wall of the plurality of embedding grooves 12. The embedding grooves 12 on the top surface of the insulating connecting ring 4 can accurately position the wiring harness 8, avoid the wiring harness 8 from crossing or shifting during assembly or operation, ensure the stable electrical connection between the wiring harness 8 and the commutator 9, and at the same time provide a regular space for subsequent fixing of the wiring harness 8, preventing the wiring harness 8 from affecting the internal structural layout and operational safety of the motor due to disordered position.

[0021] As an optional technical solution of this utility model, a modified epoxy resin layer 13 is filled between the inner wall of the first insulating support ring 5 and the top surface of the insulating connecting ring 4. Several wiring harnesses 8 are locked inside the embedding groove 12 by epoxy resin, which can lock the wiring harnesses 8 inside the embedding groove 12, replacing the traditional single resin adhesive bonding, improving the fixing stability of the wiring harnesses 8, avoiding loosening during high-frequency operation, and the modified epoxy resin layer 13 has good insulation properties, which can cover the gap between the wiring harnesses 8 and the embedding groove 12, enhance the insulation effect, and prevent leakage or short circuit.

[0022] As an optional technical solution of this utility model, a number of circumferentially arrayed stiffening plates 14 are fixedly connected to the outer surface of the insulating sleeve 3. The top of each of the stiffening plates 14 is fixedly connected to the insulating connecting ring 4. This can disperse the pressure and vibration impact force on the insulating connecting ring 4, prevent the insulating connecting ring 4 from breaking or deforming due to concentrated force, and at the same time improve the connection strength between the insulating connecting ring 4 and the insulating sleeve 3, ensure the coaxiality of the two, prevent the insulating connecting ring 4 from shifting and causing the coil body 2 to deviate, and ensure the stable operation of the motor.

[0023] An insulating ring structure for a hollow cup motor, the working principle of which is as follows: 1): When assembling the insulating ring structure, firstly, several wiring bundles 8 at the top of the coil body 2 are placed into the inner wall of several embedded grooves 12 on the top surface of the insulating connecting ring 4 to ensure that the wiring bundles 8 are precisely connected to the commutator 9 and complete the electrical connection.

[0024] 2): A modified epoxy resin layer 13 is filled between the inner wall of the first insulating support ring 5 and the top surface of the insulating connecting ring 4, so that the modified epoxy resin layer 13 covers the contact area between the wiring harness 8 and the embedding groove 12. After the modified epoxy resin layer 13 is cured, the wiring harness 8 is locked inside the embedding groove 12.

[0025] 3): The top and bottom of the coil body 2 are respectively bonded with insulating adhesive to the first insulating support ring 5 and the second insulating support ring 6. The top of the support strip 10 on the top surface of the second insulating support ring 6 is bonded to the bottom surface of the first insulating support ring 5 with insulating adhesive. The inner side of the support strip 10 is bonded to the outer surface of the coil body 2, further fixing the position of the coil body 2 and the insulating support ring.

[0026] In summary, the insulating ring structure of this hollow cup motor involves assembling the coil body 2 by first placing several wiring harnesses 8 from the top of the coil body 2 into the inner walls of several embedding slots 12 on the top surface of the insulating connecting ring 4, ensuring precise docking and electrical connection between the wiring harnesses 8 and the commutator 9. Subsequently, a modified epoxy resin layer 13 is filled between the inner wall of the first insulating support ring 5 and the top surface of the insulating connecting ring 4, covering the contact area between the wiring harnesses 8 and the embedding slots 12. After the modified epoxy resin layer 13 cures, the wiring harnesses 8 are locked inside the embedding slots 12. Simultaneously, the top and bottom of the coil body 2 are respectively bonded to the first insulating support ring 5 and the second insulating support ring 6 with insulating adhesive. The top of the support strip 10 on the top surface of the second insulating support ring 6 is bonded to the bottom surface of the first insulating support ring 5 with insulating adhesive, and the inner side of the support strip 10 is bonded to the outer surface of the coil body 2, further fixing the position of the coil body 2 and the insulating support rings. This structure uses the embedded groove 12 to initially position the wiring harness 8, and then, with the locking effect of the modified epoxy resin layer 13, it replaces the traditional bonding method that relies solely on resin insulating adhesive. This significantly improves the stability of the connection between the wiring harness 8 and the insulating connecting ring 4 and commutator 9, preventing the wiring harness 8 from loosening or shifting due to vibration and centrifugal force during high-frequency operation of the coreless motor. The modified epoxy resin layer 13 not only provides a better fixing effect but also forms a more uniform and complete insulation layer, covering the gap between the wiring harness 8 and the embedded groove 12, improving insulation performance, preventing insulation failure caused by aging and cracking of the traditional resin adhesive layer, ensuring the electrical safety of the motor, extending the motor's service life, and reducing the frequency of maintenance due to wiring problems, thus lowering operating costs. During assembly, the insulating sleeve 3 is first fixedly connected to the main shaft 1. Then, several circumferentially arrayed stiffening plates 14 are fixedly connected to the outer surface of the insulating sleeve 3. Finally, the insulating connecting ring 4 is fixedly connected to the top of the stiffening plate 14, so that the insulating connecting ring 4 forms a stable connection with the insulating sleeve 3 through the stiffening plate 14. Subsequently, the insulating connecting ring 4 is bonded to the inner wall of the coil body 2 with insulating adhesive. The first insulating support ring 5 is fixedly connected to the insulating connecting ring 4, and the second insulating support ring 6 is connected to the first insulating support ring 5 through the support strip 10 and bonded to the bottom of the coil body 2, forming a complete support system. The stiffening plate 14 on the outer surface of the insulating sleeve 3 can effectively disperse the pressure and vibration impact force on the insulating connecting ring 4, enhance the connection strength between the insulating connecting ring 4 and the insulating sleeve 3, and avoid the breakage or deformation of the connection part due to the concentrated force caused by the direct bonding of the insulating connecting ring to the insulating sleeve in the traditional structure. The circumferential array distribution of the stiffening plate 14 can make the insulating connecting ring 4 bear the force evenly, further improve the stability of the overall structure, and ensure that the insulating connecting ring 4 always maintains the coaxiality with the main shaft 1 during the operation of the motor, avoiding the displacement of the coil body 2 due to the displacement of the insulating connecting ring, which would affect the stability of the motor magnetic field and the operating efficiency.Meanwhile, the support system formed by the first insulating support ring 5, the second insulating support ring 6 and the support bar 10 can fix the coil body 2 in all directions, reduce the vibration of the coil body 2, improve the overall stability and reliability of the hollow cup motor, and adapt to the requirements of high frequency and high precision operation.

Claims

1. An insulating ring structure for a hollow cup motor, characterized in that: The device includes a main shaft (1) and a coil body (2). The main shaft (1) is fixedly connected to an insulating sleeve (3). An insulating connecting ring (4) is fixedly connected to the outer surface of the insulating sleeve (3). The insulating connecting ring (4) is bonded to the inner wall of the coil body (2) with insulating adhesive. The top and bottom ends of the coil body (2) are both bonded with insulating adhesive to a first insulating support ring (5) and a second insulating support ring (6). The centers of the first insulating support ring (5) and the second insulating support ring (6) coincide with the axis of the main shaft (1). The first insulating support ring (5) and the insulating connecting ring (4) are fixedly connected. The top end of the coil body (2) is fixedly connected to a plurality of circumferential array wiring bundles (8). The outer surface of the insulating sleeve (3) is fixedly connected to a commutator (9). The plurality of wiring bundles (8) are electrically connected to the commutator (9).

2. The insulating ring structure of a hollow cup motor according to claim 1, characterized in that: The top surface of the second insulating support ring (6) is fixedly connected with a plurality of circumferentially arrayed support bars (10). The top ends of the plurality of support bars (10) are all bonded to the bottom surface of the first insulating support ring (5) by insulating adhesive. The inner side of the support bars (10) is bonded to the outer surface of the coil body (2) by insulating adhesive. The support bars (10), the first insulating support ring (5) and the second insulating support ring (6) are all made of polyimide resin.

3. The insulating ring structure of a hollow cup motor according to claim 2, characterized in that: Each of the support bars (10) is fixedly connected to a card plate (11) at its top end, and several of the card plates (11) are inserted into the bottom surface of the first insulating support ring (5).

4. The insulating ring structure of a hollow cup motor according to claim 3, characterized in that: The top surface of the insulating connecting ring (4) is provided with a number of circumferentially arrayed embedding slots (12), and the wiring harness (8) is located on the inner wall of the number of embedding slots (12).

5. The insulating ring structure of a hollow cup motor according to claim 4, characterized in that: A modified epoxy resin layer (13) is filled between the inner wall of the first insulating support ring (5) and the top surface of the insulating connecting ring (4), and several of the wiring harnesses (8) are locked inside the embedding groove (12) by epoxy resin.

6. The insulating ring structure of a hollow cup motor according to claim 5, characterized in that: The outer surface of the insulating sleeve (3) is fixedly connected with a number of circumferentially arrayed stiffening plates (14), and the top of each of the stiffening plates (14) is fixedly connected to the insulating connecting ring (4).

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