Non-metallic flux disk rotor assembly for preventing plastic rod from falling off

Abstract

This invention discloses a non-metallic magnetic flux disk rotor assembly with a plastic rod to prevent detachment. The non-metallic magnetic flux disk is tightly fitted to the magnet and embedded in a long cylindrical plastic rod, providing support for the magnet and the long cylindrical plastic rod and enabling the magnet to be installed and positioned. The magnet is placed in a preset mounting position on the non-metallic magnetic flux disk, is glued to the non-metallic magnetic flux disk, and is embedded in contact with the long cylindrical plastic rod, providing a magnetic field to power the motor. The long cylindrical plastic rod is placed in the fitting cavity formed by the groove of the non-metallic magnetic flux disk and the slot of the magnet, and is embedded in both the non-metallic magnetic flux disk and the magnet, providing double-sided clamping and fixing of the magnet to prevent it from falling off under the action of magnetic attraction and centrifugal force of motor operation, while also reducing the air gap between the magnet and the iron core. This invention improves magnetic field utilization, optimizes the energy conversion efficiency of the motor, reduces operating noise and energy loss, is easy to operate, and reduces equipment maintenance costs.

Description

Technical Field

[0001] This invention relates to a rotor assembly, and more particularly, to a non-metallic magnetic flux disk rotor assembly with a plastic rod anti-detachment feature. Background Technology

[0002] In the technical field of motor rotor assemblies, the mating structure of the magnetic flux disk and magnets is a core component determining the motor's operating efficiency, stability, and service life. Traditional rotor assemblies often employ a direct-mount design with a metal magnetic flux disk and magnets. However, this design has shortcomings in practical applications, failing to meet the demands for high efficiency, stability, and long lifespan in motors. Specifically, traditional metal magnetic flux disks, due to their inherent magnetic conductivity, are prone to internal magnetic losses during motor operation. This consumes magnetic field energy and generates additional heat, reducing the motor's energy conversion efficiency and affecting the component's operational stability. Furthermore, the direct-mount assembly method, relying solely on simple bonding or basic fixing structures to install the magnets onto the magnetic flux disk, suffers from the centrifugal force generated during high-speed motor operation. Under the combined effect of the magnet's own magnetic attraction, the magnet is prone to detachment. Once detached, it will directly damage the internal structure of the motor, causing equipment failure and significantly reducing the reliability of the motor. At the same time, the design of the traditional magnet fixing structure is not reasonable enough. The air gap between the magnet and the iron core is difficult to control precisely. An excessively large air gap will lead to a high leakage magnetic field rate in the motor, further weakening the magnetic field utilization rate and reducing the motor's operating efficiency. In addition, the metal flux disk is also prone to corrosion and rust, which limits its service life under complex working conditions. Moreover, the weight of the metal material is relatively large, which will increase the rotational inertia of the rotor when rotating at high speed. This not only increases the energy consumption of the motor, but also generates greater operating noise, making it difficult to meet the current development requirements of lightweight, low-noise, and high-reliability motors.

[0003] Therefore, those skilled in the art are dedicated to providing a non-metallic magnetic flux disk rotor assembly that can effectively solve the above-mentioned technical problems and prevent plastic rods from falling off. Summary of the Invention

[0004] To achieve the above objectives, the present invention provides a non-metallic magnetic flux disk rotor assembly for preventing plastic rods from falling off, comprising a non-metallic magnetic flux disk, a magnet, and a long cylindrical plastic rod; The non-metallic magnetic flux disk is closely fitted with several magnets and embedded in a long cylindrical plastic rod. It is used to provide support for the magnets and the long cylindrical plastic rod, realize the installation and positioning of the magnets, and form an embedded clamping structure for the magnets in conjunction with the long cylindrical plastic rod. It also eliminates the internal loss caused by the metal magnetic conduction and reduces magnetic leakage. Several of the aforementioned magnets are set at the preset mounting positions of the non-metallic magnetic flux disk, and are glued and bonded to the non-metallic magnetic flux disk and embedded and contacted with the long cylindrical plastic rods to provide a magnetic field and provide power for the motor to run. The magnets are provided with slots on both sides, which cooperate with the grooves of the non-metallic magnetic flux disk to form a fitting cavity for the long cylindrical plastic rods to be embedded to achieve their own fixation. The long cylindrical plastic rod is set in the fitting cavity formed by the groove of the non-metallic magnetic flux disk and the slot of the magnet, and is fitted and connected with both the non-metallic magnetic flux disk and the magnet. It is used to clamp and fix the magnet on both sides to prevent the magnet from falling off under the action of magnetic attraction and centrifugal force of motor operation.

[0005] Furthermore, the preset mounting position includes a plurality of mounting openings formed on the non-metallic flux disk. Each mounting opening is evenly distributed in a circular array along the center line of the non-metallic flux disk. Each mounting opening is provided with two grooves formed on the non-metallic flux disk. Each groove extends from the outer wall of the non-metallic flux disk to the mounting opening.

[0006] Furthermore, the cross-section of the magnet is fan-shaped and gradually increases in size from the outside to the inside, and the shape of the mounting opening is adapted to the external size of the magnet.

[0007] Furthermore, it also includes a motor shaft, a flat key, a locking ring, and locking bolts; the slot of the magnet has a concave structure, and the cross-section of the slot and the groove of the non-metallic magnetic flux disk are both arc-shaped, which are adapted to the outer circumferential surface of the long cylindrical plastic rod to form an interlocking structure; each magnet is equipped with two long cylindrical plastic rods, and the two long cylindrical plastic rods are respectively embedded in the interlocking cavity formed by the slots on both sides of the magnet and the corresponding grooves of the non-metallic magnetic flux disk; The locking bolt is located on the outside of the non-metallic magnetic flux disk and corresponds to the end of the long cylindrical plastic rod, used to lock and fix the long cylindrical plastic rod; the motor shaft passes through the central hole of the non-metallic magnetic flux disk, and the flat key is located at the connection between the motor shaft and the non-metallic magnetic flux disk to achieve circumferential fixation of the two; the locking ring is sleeved on the end of the motor shaft, and the motor shaft, the non-metallic magnetic flux disk and the locking ring are locked and fixed by the locking bolt.

[0008] Furthermore, the non-metallic magnetic flux disk is made of a non-metallic material, which has the characteristics of insulation, lightweight, corrosion and rust prevention, and easy shaping. The non-metallic magnetic flux disk is tightly attached to the magnet and there is no magnetic conduction loss.

[0009] Furthermore, the non-metallic magnetic flux disk is configured by injection molding to match the fit of the magnet.

[0010] Furthermore, the elongated cylindrical plastic rod is made of rigid plastic, and the axial length of the elongated cylindrical plastic rod matches the axial length of the magnet.

[0011] Furthermore, the bonding surface between the magnet and the non-metallic magnetic flux disk is coated with structural adhesive, and the magnet is pre-fixed to the non-metallic magnetic flux disk by the structural adhesive; the structural adhesive is a high-temperature resistant epoxy structural adhesive, and the curing conditions of the adhesive are: curing at 100°C for 40 minutes, thermal strength at 25°C for 26 MPa, and thermal strength at 180°C for 5 MPa.

[0012] Furthermore, the surface of the elongated cylindrical plastic rod is coated with the structural adhesive, and the elongated cylindrical plastic rod is fixedly connected to the inner wall of the fitting cavity through the structural adhesive; the flat key fits tightly with the keyway on the motor shaft, and there is no loose gap between the two.

[0013] Furthermore, the motor shaft is fixedly connected to the non-metallic magnetic flux disk by six locking bolts, and the number of magnets is twelve; however, it is not limited to twelve, and the specific number of magnets 2 can be increased or decreased according to actual needs. The power range of this rotor assembly is 3~100kw, the rated speed is 2400rpm, the maximum speed is 5000rpm, and the suitable operating environment temperature is -30℃~45℃.

[0014] The present invention has the following beneficial effects: 1. The non-metallic flux disk in this invention is made of non-metallic material with no magnetic permeability, which completely eliminates the internal magnetic permeability loss of traditional metal flux disks, avoids the waste of magnetic field energy and additional heat generation; at the same time, the arc-shaped interlocking structure of the long cylindrical plastic rod with the magnet and flux disk greatly reduces the distance from the magnet surface to the support surface, accurately controls the air gap size from the magnet to the iron core, significantly reduces the motor leakage magnetic rate, improves the magnetic field utilization rate, and optimizes the energy conversion efficiency of the motor. 2. This invention employs a triple-fixing method—clamping, adhesive bonding, and bolt locking—to achieve stable installation of the magnet: the arc-shaped clamping cavity formed by the slots on both sides of the magnet and the groove of the magnetic flux disk, combined with the plastic rod, clamps the magnet on both sides, forming the first layer of protection structurally; the bonding with high-temperature resistant epoxy structural adhesive allows for seamless fixing of the magnet to the magnetic flux disk and the plastic rod to the clamping cavity, enhancing structural stability; the locking bolts on the outside of the non-metallic magnetic flux disk lock the end of the plastic rod, while the motor shaft and the magnetic flux disk are locked together through a flat key, locking ring, and locking bolts, completely preventing the magnet from falling off under the action of magnetic attraction and centrifugal force during high-speed motor operation, preventing internal damage to the motor, and improving the mechanical reliability of the rotor assembly and even the entire motor; 3. The non-metallic flux disk in this invention has lightweight material properties, which effectively reduces the rotational inertia of the rotor when it rotates at high speed. This not only reduces the operating energy consumption of the motor and achieves energy-saving effect, but also reduces vibration and noise during rotor operation, improving the overall operating experience of the motor. At the same time, the precise fitting and assembly of each component ensures the coaxiality and stability of the rotor assembly rotation, further reducing operating noise and energy loss. 4. The non-metallic flux disk in this invention has the advantages of corrosion and rust resistance, which significantly improves its service life in complex environments compared to traditional metal flux disks, making it suitable for more industrial and civilian applications. Furthermore, the non-metallic material is easily shaped, and injection molding can achieve 100% fit with the fan-shaped magnets, further optimizing the magnetic field distribution and improving motor performance. Simultaneously, the component is suitable for a wide operating temperature range of -30℃ to 45℃, with power ranging from 3 to 100 kW, a rated speed of 2400 rpm, and a maximum speed of 5000 rpm, meeting the continuous and stable operation requirements of the motor in different scenarios. 5. The components of this invention adopt a modular design. The matching relationship between the magnets, plastic rods, and magnetic flux disks is precise and standardized. The 12 magnets are evenly distributed in a circular array. Each magnet is adapted to the fixing method of two plastic rods, and the structural layout is reasonable. At the same time, the assembly process is clear and standardized. Each step of gluing, fitting, locking, and assembly can be standardized, which is conducive to industrial mass production. Each locking bolt is designed to be detachable. If maintenance or replacement of parts is required in the future, the operation is convenient and the maintenance cost of the equipment is reduced. Attached Figure Description

[0015] Figure 1 This is a structural schematic diagram of a specific embodiment of the present invention.

[0016] Figure 2 This is another three-dimensional structural schematic diagram of the present invention.

[0017] Figure 3 This is a schematic diagram of the structure without magnets in this invention.

[0018] Figure 4 This is a structural diagram of the present invention without components such as motor shafts and magnets.

[0019] Figure 5 This is a schematic diagram of a non-metallic flux disk with an installation port and groove.

[0020] Figure 6 This is a schematic diagram of the structure used in conjunction with a magnet and a long cylindrical plastic rod.

[0021] Figure 7 This is a schematic diagram of a structure with slots on both sides of the magnet. Detailed Implementation

[0022] The present invention will be further described below with reference to the accompanying drawings and embodiments: In the description of this invention, it should be noted that the terms "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0023] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "setting," and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0024] like Figures 1 to 7 As shown, a non-metallic magnetic flux disk rotor assembly for preventing plastic rods from falling off includes a non-metallic magnetic flux disk 1, a magnet 2, and a long cylindrical plastic rod 3. The non-metallic magnetic flux disk 1 is closely fitted with several magnets 2 and embedded in a long cylindrical plastic rod 3. It is used to provide support for the magnets 2 and the long cylindrical plastic rod 3, realize the installation and positioning of the magnets 2, and at the same time, it forms an embedded clamping structure for the magnets 2 with the long cylindrical plastic rod 3, and eliminates the internal loss caused by the metal magnetic conduction and reduces magnetic leakage. Several magnets 2 are set at preset mounting positions on the non-metallic magnetic flux disk 1, and are glued and bonded to the non-metallic magnetic flux disk 1 and embedded and contacted with the long cylindrical plastic rod 3 to provide a magnetic field and power the motor. The magnets 2 are provided with slots 6 on both sides, which cooperate with the grooves 5 of the non-metallic magnetic flux disk 1 to form a fitting cavity for the long cylindrical plastic rod 3 to be embedded and fixed. The long cylindrical plastic rod 3 is set in the fitting cavity formed by the groove 5 of the non-metallic magnetic flux disk 1 and the slot 6 of the magnet 2. It is fitted and connected to both the non-metallic magnetic flux disk 1 and the magnet 2 to clamp and fix the magnet 2 on both sides, preventing the magnet 2 from falling off under the action of magnetic attraction and centrifugal force of motor operation. At the same time, it reduces the air gap between the magnet and the iron core and reduces the leakage magnetic rate.

[0025] The preset installation position includes a plurality of installation ports 7 opened on the non-metallic magnetic flux disk 1. Each installation port 7 is evenly distributed in a circular array along the center line of the non-metallic magnetic flux disk 1. Each installation port 7 is provided with two grooves 5 opened on the non-metallic magnetic flux disk 1. Each groove 5 extends from the outer wall of the non-metallic magnetic flux disk 1 to the installation port 7.

[0026] The cross-section of the magnet 2 is fan-shaped and gradually increases in size from the outside to the inside. The shape of the mounting opening 7 is adapted to the size of the magnet 2.

[0027] It also includes a motor shaft 8, a flat key, a locking ring, and a locking bolt 9; the slot 6 of the magnet 2 has a concave structure, and the cross-section of the slot 6 and the groove 5 of the non-metallic magnetic flux disk 1 are both arc-shaped, which are adapted to the outer circumference of the long cylindrical plastic rod 3 to form an interlocking structure; each magnet 2 is equipped with two long cylindrical plastic rods 3, and the two long cylindrical plastic rods 3 are respectively embedded in the interlocking cavity formed by the slot 6 on both sides of the magnet 2 and the corresponding groove 5 of the non-metallic magnetic flux disk 1; The locking bolt 9 is located on the outside of the non-metallic magnetic flux disk 1 and corresponds to the end of the long cylindrical plastic rod 3, and is used to lock and fix the long cylindrical plastic rod 3; the motor shaft 8 passes through the central hole of the non-metallic magnetic flux disk 1, and the flat key is located at the connection between the motor shaft 8 and the non-metallic magnetic flux disk 1 to achieve circumferential fixation of the two; the locking ring is sleeved on the end of the motor shaft 8, and the motor shaft 8, the non-metallic magnetic flux disk 1 and the locking ring are locked and fixed by the locking bolt 9.

[0028] The non-metallic magnetic flux disk 1 is made of non-metallic material, which has the characteristics of insulation, lightweight, corrosion and rust prevention, and easy shaping. Furthermore, the non-metallic magnetic flux disk 1 is tightly attached to the magnet 2 without magnetic conduction loss.

[0029] The non-metallic magnetic flux disk 1 is configured by injection molding, and its fit with the magnet 2 is adapted.

[0030] The elongated cylindrical plastic rod 3 is made of rigid plastic, and the axial length of the elongated cylindrical plastic rod 3 matches the axial length of the magnet 2.

[0031] The bonding surfaces of the magnet 2 and the non-metallic magnetic flux disk 1 are coated with structural adhesive, and the magnet 2 is pre-fixed to the non-metallic magnetic flux disk 1 by the structural adhesive. The structural adhesive is a high-temperature resistant epoxy structural adhesive. Preferably, more specifically, the adhesive is EP1249 high-temperature resistant epoxy structural adhesive, which has the following curing conditions: curing at 100°C for 40 minutes, a thermal strength of 26 MPa at 25°C, and a thermal strength of 5 MPa at 180°C.

[0032] The surface of the elongated cylindrical plastic rod 3 is coated with the structural adhesive, and the elongated cylindrical plastic rod 3 is fixedly connected to the inner wall of the fitting cavity by the structural adhesive; the flat key is tightly fitted to the keyway on the motor shaft 8, and there is no loose gap between the two.

[0033] The motor shaft 8 is fixedly connected to the non-metallic magnetic flux disk 1 by six locking bolts 10. In this embodiment, the number of magnets 2 is twelve, but not limited to twelve. The specific number of magnets 2 can be increased or decreased according to actual needs.

[0034] The rotor assembly has a power range of 3~100kw, a rated speed of 2400rpm, a maximum speed of 5000rpm, and is suitable for operating environments ranging from -30℃ to 45℃.

[0035] More specifically, this invention solves the technical problems of traditional metal magnetic flux disks being prone to internal losses due to magnetization, direct-mounted magnet structures being prone to detachment due to magnetic attraction and centrifugal force during motor operation, and excessive air gaps leading to low motor efficiency. This invention achieves the technical effects of reducing magnetic leakage, improving the mechanical reliability of the rotor assembly, and optimizing the overall operating performance of the motor by using a non-metallic magnetic flux disk combined with a long cylindrical plastic rod to embed and fix the magnet, along with multiple locking and bonding processes. This rotor assembly is suitable for motors with power ranging from 3 to 100 kW and can operate stably in environments from -30℃ to 45℃.

[0036] The non-metallic magnetic flux disk rotor assembly for preventing the plastic rod from falling off, as described in this invention, mainly includes a non-metallic magnetic flux disk 1, a sector-shaped magnet 2, a long cylindrical plastic rod 3, and auxiliary assembly and fixing components such as a motor shaft 8, a flat key, a locking ring, and locking bolts. The non-metallic magnetic flux disk 1 serves as the core support structure, the sector-shaped magnet 2 is the power core, and the long cylindrical plastic rod 3 is a key component for preventing the magnet from falling off. These components work together to form a complete rotor transmission and fixing structure. More specifically: Non-metallic flux disk 1: Made of non-metallic material with performance comparable to metal rigidity, it has the characteristics of insulation, lightweight, corrosion and rust prevention, and easy shaping. It is shaped by injection molding and can fit tightly with the fan-shaped magnet 2 without magnetic conduction loss. There are 12 mounting holes 7 in a circular array along the center line of the flux disk, which are adapted to the shape of the fan-shaped magnet 2. Each mounting hole 7 has an arc-shaped groove 5 on both sides that runs from the outer wall of the flux disk to the mounting hole 7, providing a basis for magnet installation and plastic rod fitting.

[0037] Sector-shaped magnets 2: There are 12 of them. The cross-section is sector-shaped and gradually increases in size from the outside to the inside. They are precisely matched with the mounting port 7 of the non-metallic magnetic flux disk 1 and are the source of magnetic field power for the motor to run. The magnets have concave arc-shaped slots 6 on both sides. The slots 6 match the arc-shaped grooves 5 of the non-metallic magnetic flux disk 1 to form a fitting cavity for the plastic rod 3 to be embedded and fixed.

[0038] Long cylindrical plastic rod 3: Made of hard plastic material, its axial length is perfectly matched with the axial length of the fan-shaped magnet 2; each fan-shaped magnet 2 is independently equipped with 2 plastic rods 3, whose outer circumference is precisely matched with the arc-shaped inner wall of the fitting cavity, so as to achieve double-sided clamping of the magnet 2, and at the same time reduce the air gap between the magnet and the iron core, and reduce the leakage magnetic rate.

[0039] Auxiliary fixing components: The motor shaft 8 is the power transmission shaft of the rotor and is fixedly connected to the non-metallic magnetic disk 1 by 6 locking bolts 10; a flat key is set at the connection between the motor shaft 8 and the non-metallic magnetic disk 1 to achieve circumferential fixation of the two and ensure stable torque transmission; a locking ring is sleeved on the end of the motor shaft 8 and, together with the locking bolts 9, locks the motor shaft 8, the non-metallic magnetic disk 1, and the locking ring into one unit; the locking bolts are divided into two types: the locking bolts 9 are used to lock and fix the end of the plastic rod 3, and the locking bolts 10 are used to achieve overall locking of the motor shaft 8, the magnetic disk 1, and the locking ring.

[0040] Core connection and fixed structure The interlocking clamping structure: The arc-shaped slot 6 of the fan-shaped magnet 2 and the arc-shaped groove 5 of the non-metallic magnetic flux disk 1 are spliced ​​to form an arc-shaped interlocking cavity. After the long cylindrical plastic rod 3 is inserted into the interlocking cavity, its outer circumference is completely attached to the inner wall of the interlocking cavity, forming an integrated interlocking structure of plastic rod 3, magnetic flux disk 1, and magnet 2. A single magnet 2 is clamped on both sides by two plastic rods 3 on both sides, which structurally prevents the magnet 2 from falling off under the action of magnetic attraction and centrifugal force.

[0041] Adhesive fixing structure: The mating surfaces of the magnet 2 and the non-metallic magnetic flux disk 1, as well as the surface of the long cylindrical plastic rod 3, are coated with EP1249 high-temperature resistant epoxy structural adhesive. This adhesive cures for 40 minutes at 100°C, has a thermal strength of 26MPa at 25°C, and a thermal strength of 5MPa at 180°C. The adhesive bonding achieves seamless fixing of the magnet 2 and the magnetic flux disk 1, and the plastic rod 3 and the fitting cavity, thus enhancing structural stability.

[0042] Mechanical locking structure: Locking bolts 9 are set on the outer side of the non-metallic magnetic flux disk 1 at the position corresponding to the end of the plastic rod 3. After tightening, the end of the plastic rod 3 is locked to prevent the plastic rod 3 from being thrown out by centrifugal force when the motor is running at high speed. After the motor shaft 8 and the non-metallic magnetic flux disk 1 are circumferentially fixed by a flat key, the axial and radial overall locking is achieved by locking ring and locking bolts 9. At the same time, 6 locking bolts 10 are used to strengthen the connection between the motor shaft 8 and the magnetic flux disk 1 to ensure that the rotor assembly has no relative displacement.

[0043] The assembly process is as follows: EP1249 high-temperature resistant epoxy structural adhesive is evenly applied to the mating surfaces of the fan-shaped magnets 2 and the non-metallic magnetic flux disk 1. Twelve fan-shaped magnets 2 are precisely embedded into the twelve mounting holes 7 of the non-metallic magnetic flux disk 1, ensuring a complete fit and tight contact between the magnets 2 and the mounting holes 7. The assembly is allowed to stand until the adhesive has initially cured, achieving pre-fixation of the magnets 2 and the non-metallic magnetic flux disk 1. EP1249 high-temperature resistant epoxy structural adhesive is evenly applied to the outer circumference of the long cylindrical plastic rods 3. Following the specification of two plastic rods 3 per magnet 2, the plastic rods 3 are embedded into the fitting cavities formed by the slots 6 on both sides of the magnets 2 and the grooves 5 of the magnetic flux disk 1, ensuring complete contact between the plastic rods 3 and the inner walls of the fitting cavities, achieving double-sided clamping of the magnets 2. Then, the locking bolts 9 on the outer side of the non-metallic magnetic flux disk 1 corresponding to the ends of the plastic rods 3 are tightened to lock and fix the plastic rods 3 in place. All plastic rods 3 are then complete. After the key is fitted and locked, allow it to stand until the adhesive is completely cured. Install the flat key into the pre-set keyway on the motor shaft 8, ensuring that the flat key and the keyway fit tightly without any looseness or gaps, laying the foundation for the subsequent circumferential fixation of the magnetic flux disk 1 and the motor shaft 8. Align the center hole of the non-metallic magnetic flux disk 1, which has been fixed with the magnet 2 and the plastic rod 3, with the motor shaft 8, and slowly slide it in along the axial direction of the motor shaft 8, so that the non-metallic magnetic flux disk 1 and the motor shaft 8 can achieve precise circumferential positioning through the flat key, ensuring the stability of torque transmission. Place the locking ring on the end of the motor shaft 8, align it with the pre-set locking hole, insert the locking bolt 9 into the hole and tighten it, so that the motor shaft 8, the non-metallic magnetic flux disk 1 and the locking ring are tightly locked together without relative displacement. At the same time, check the 6 locking bolts 10 connecting the motor shaft 8 and the magnetic flux disk 1 to ensure that they are all tightened, completing the overall assembly of the non-metallic magnetic flux disk rotor assembly to prevent the plastic rod from falling off.

[0044] Component performance parameters and operating characteristics Core performance parameters: The rotor assembly in this embodiment is compatible with motors with power ranges from 3 to 100 kW, a rated operating speed of 2400 rpm, a maximum tolerable speed of 5000 rpm, and an operating environment temperature range of -30℃ to 45℃, which can meet the requirements for continuous and stable operation of the motor under this condition; the non-metallic magnetic flux disk 1 is injection molded, with 100% fit with the magnet 2, and the axial length of the plastic rod 3 is completely matched with the magnet 2, with no clamping gap.

[0045] Low loss and low magnetic leakage: The non-metallic magnetic flux disk 1 eliminates the internal magnetic conduction loss of the traditional metal magnetic flux disk, and the plastic rod 3 interlocking structure reduces the air gap between the magnet 2 and the iron core, greatly reducing the magnetic leakage rate and improving the motor operating efficiency. High mechanical reliability: Through a triple fixing method of interlocking clamping, adhesive bonding, and bolt locking, the magnet 2 is completely prevented from falling off under the action of magnetic attraction and centrifugal force, thus preventing damage to the motor; Lightweight and low noise: The lightweight nature of the non-metallic flux disk 1 reduces the rotational inertia of the rotor when it rotates at high speed. Combined with the precise assembly of each component, it achieves the effects of reducing noise and saving energy during motor operation. Long service life: The non-metallic flux disk 1 has anti-corrosion and anti-rust properties. Combined with the high-strength bonding of EP1249 structural adhesive and the mechanical locking of the locking bolts, it effectively improves the overall service life of the rotor assembly. In addition, the easy-to-shape characteristics of the non-metallic flux disk 1 make it fit better with the sector magnet 2, further optimizing the motor performance.

[0046] The preferred embodiments of the present invention have been described in detail above. It should be understood that those skilled in the art can make numerous modifications and variations based on the concept of the present invention without creative effort. Therefore, all technical solutions that can be obtained by those skilled in the art based on the concept of the present invention through logical analysis, reasoning, or limited experimentation on the basis of existing technology should be within the scope of protection defined by the claims.

Claims

1. A non-metallic flux disk rotor assembly for preventing plastic rods from falling off, characterized in that: It includes a non-metallic magnetic flux disk (1), a magnet (2), and a long cylindrical plastic rod (3). The non-metallic magnetic flux disk (1) is closely fitted with several magnets (2) and embedded in a long cylindrical plastic rod (3) to provide support for the magnets (2) and the long cylindrical plastic rod (3), thereby realizing the installation and positioning of the magnets (2). At the same time, it forms an embedded clamping structure for the magnets (2) in conjunction with the long cylindrical plastic rod (3). Several magnets (2) are set in the preset installation position of the non-metallic magnetic flux disk (1), and are glued and bonded to the non-metallic magnetic flux disk (1) and fitted and contacted with the long cylindrical plastic rod (3) to provide a magnetic field and provide power for the motor to run. The magnets (2) are provided with slots (6) on both sides. The slots (6) cooperate with the grooves (5) of the non-metallic magnetic flux disk (1) to form a fitting cavity for the long cylindrical plastic rod (3) to be embedded to achieve self-fixation. The long cylindrical plastic rod (3) is set in the fitting cavity formed by the groove (5) of the non-metallic magnetic flux disk (1) and the slot (6) of the magnet (2), and is fitted and connected with both the non-metallic magnetic flux disk (1) and the magnet (2) to achieve double-sided clamping and fixing of the magnet (2), preventing the magnet (2) from falling off under the action of magnetic attraction and centrifugal force of motor operation, and at the same time reducing the air gap between the magnet and the iron core.

2. The non-metallic flux disk rotor assembly for preventing the plastic rod from falling off according to claim 1, characterized in that: The preset installation position includes a plurality of installation ports (7) opened on the non-metallic magnetic flux disk (1). Each installation port (7) is evenly distributed in a circular array along the center line of the non-metallic magnetic flux disk (1). Each installation port (7) is provided with two grooves (5) opened on the non-metallic magnetic flux disk (1). Each groove (5) extends from the outer wall of the non-metallic magnetic flux disk (1) to the installation port (7).

3. The non-metallic flux disk rotor assembly for preventing the plastic rod from falling off according to claim 2, characterized in that: The cross-section of the magnet (2) is fan-shaped and gradually increases from the outside to the inside. The shape of the mounting port (7) is adapted to the size of the magnet (2).

4. The non-metallic flux disk rotor assembly for preventing the plastic rod from falling off according to claim 1, characterized in that: It also includes a motor shaft (8), a flat key, a locking ring, and a locking bolt (9); the slot (6) of the magnet (2) is a concave structure, and the cross-section of the slot (6) and the groove (5) of the non-metallic magnetic flux disk (1) are both arc-shaped, which are adapted to the outer circumference of the long cylindrical plastic rod (3) to form an interlocking structure; each magnet (2) is equipped with two long cylindrical plastic rods (3), and the two long cylindrical plastic rods (3) are respectively embedded in the interlocking cavity formed by the slot (6) on both sides of the magnet (2) and the corresponding groove (5) of the non-metallic magnetic flux disk (1); The locking bolt (9) is located on the outside of the non-metallic magnetic flux disk (1) and corresponds to the end of the long cylindrical plastic rod (3) for locking and fixing the long cylindrical plastic rod (3); the motor shaft (8) passes through the center hole of the non-metallic magnetic flux disk (1), and the flat key is located at the connection between the motor shaft (8) and the non-metallic magnetic flux disk (1) to achieve circumferential fixation of the two; the locking ring is sleeved on the end of the motor shaft (8), and the motor shaft (8), the non-metallic magnetic flux disk (1) and the locking ring are locked and fixed by the locking bolt (9).

5. The non-metallic flux disk rotor assembly for preventing plastic rod detachment according to claim 1, characterized in that: The non-metallic magnetic flux disk (1) is made of non-metallic material. This non-metallic material has the characteristics of insulation, lightweight, corrosion and rust prevention, and easy shaping. The non-metallic magnetic flux disk (1) is tightly attached to the magnet (2) without magnetic loss.

6. The non-metallic flux disk rotor assembly for preventing the plastic rod from falling off according to claim 5, characterized in that: The non-metallic magnetic flux disk (1) is configured by injection molding, and its fit with the magnet (2) is adapted.

7. The non-metallic flux disk rotor assembly for preventing the plastic rod from falling off according to claim 1, characterized in that: The long cylindrical plastic rod (3) is made of hard plastic, and the axial length of the long cylindrical plastic rod (3) matches the axial length of the magnet (2).

8. The non-metallic flux disk rotor assembly for preventing the plastic rod from falling off according to claim 1, characterized in that: The bonding surfaces of the magnet (2) and the non-metallic magnetic flux disk (1) are coated with structural adhesive, and the magnet (2) is pre-fixed to the non-metallic magnetic flux disk (1) by the structural adhesive; The structural adhesive is a high-temperature resistant epoxy structural adhesive. The curing conditions of the adhesive are: curing at 100°C for 40 minutes, thermal strength at 25°C of 26 MPa, and thermal strength at 180°C of 5 MPa.

9. The non-metallic flux disk rotor assembly for preventing the plastic rod from falling off according to claim 8, characterized in that: The surface of the long cylindrical plastic rod (3) is coated with the structural adhesive, and the long cylindrical plastic rod (3) is fixedly connected to the inner wall of the fitting cavity by the structural adhesive; the flat key is tightly fitted to the keyway on the motor shaft (8), and there is no loose gap between them.

10. The non-metallic flux disk rotor assembly for preventing the plastic rod from falling off according to claim 9, characterized in that: The motor shaft (8) is fixedly connected to the non-metallic magnetic flux disk (1) by six locking bolts (10), and the number of magnets (2) is twelve; the power range of the rotor assembly is 3~100kw, the rated speed is 2400rpm, the maximum speed is 5000rpm, and the suitable working environment temperature is -30℃~45℃.

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