Anti-loosening rotor core fixing assembly on motor

Abstract

The utility model relates to the technical field of servo motor manufacturing, and discloses an anti-loosening rotor core assembly on a motor, which comprises an iron body, the inner wall of the iron body is fixedly connected with a rotating shaft, the inner wall of the iron body is connected with a reinforcing rib, the left end and the right end of the reinforcing rib are fixedly connected with a shaft disc, the inner wall of the shaft disc is connected with a fixed shaft, and the fixed shaft is fixedly connected with the rotating shaft. The outer wall of the fixing shaft is in threaded connection with a nut, the left side and the right side of the iron body are both connected with embedded pipes, the outer walls of the embedded pipes are provided with embedded grooves, and the outer walls of the embedded grooves are connected with expansion rings. According to the motor rotor structure, the grid-shaped reinforcing ribs are integrated in the middle of the iron core to achieve mechanical strengthening, the end portion of the iron core is in rigid connection with the shaft disc through the interference fit technology, the groove channels are formed in the surface of the embedded column on the iron core through laser machining, and the shape memory alloy expansion rings are assembled in the grooves. When the temperature reaches a preset threshold value, the expansion ring generates directional deformation, so that the overall stability of the fixing assembly is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to servo motor manufacturing technical field especially relates to motor anti-loose rotor core fixed assembly. BACKGROUND

[0002] Motor rotor core is the core component of rotating electrical machine, is formed by high permeability silicon steel sheet through stamping and stacking, its function is through magnetic field transmission mechanical energy, surface distribution even slot hole is used for embedding conductive winding, internal magnetic circuit design directly influences energy conversion efficiency and operating stability, based on the rotation characteristic of core, fixed assembly needs to ensure that the laminated sheet is connected closely in the axial direction, adopts end ring buckling or welding process to prevent loose structure caused by centrifugal force, balances the dynamic characteristics of rotor simultaneously, optimizes the heat dissipation path, thereby guaranteeing the reliability and life cycle of motor under high speed working condition.

[0003] Traditional motor rotor core fixed assembly relies on mechanical locking or welding process to press the laminated sheet in the axial direction, forms rigid connection through laminated sheet and rotating shaft cooperation, resists centrifugal force and alternating load by means of friction and structural strength, ensures that the core maintains integrity and power transmission stability in the rotating process, its defect lies in that under long-term high load operation, micro deformation is prone to be generated due to material fatigue or thermal stress, which leads to uneven stress distribution of contact surface, and then weakens the fixed effect and induces loose hidden danger.

[0004] Prior art adopts elastic element or pre-tightening structure to optimize fixed assembly, utilizes dynamic compensation mechanism to balance the influence of load fluctuation on laminated sheet, absorbs vibration energy through segmented locking or damping material, reduces stress concentration risk, but in actual use, the above device exists pre-tightening force attenuation caused by assembly error, elastic element rebound lag under high speed working condition weakens dynamic compensation ability, material interface produces creep effect due to temperature rise, finally still can cause progressive structure loosening, therefore, motor anti-loose rotor core fixed assembly is proposed to solve the above problems. UTILITY MODEL CONTENTS

[0005] In order to make up for the above shortage, the utility model provides motor anti-loose rotor core fixed assembly, aims at improving the problem of fixed assembly pre-tightening force attenuation in prior art.

[0006] In order to achieve the above object, the utility model discloses the following technical scheme: motor anti-loosening rotor core fixing assembly, including the iron body, the inner wall fixed connection of iron body has the pivot, the inner wall fixed connection of iron body has the reinforcing rib, the left and right ends of reinforcing rib all are fixedly connected with the axle disc, the inner wall fixed connection of axle disc has the fixed shaft, the outer wall of fixed shaft is connected with the nut in screw threads, the left and right sides of iron body all are fixedly connected with the embedded pipe, the outer wall of embedded pipe is set with embedded groove, the outer wall fixed connection of embedded groove has the expansion ring, the outer wall of pivot is provided with damping mechanism, and the damping mechanism is used to slow down the transverse vibration of rotor in the high-speed operation of motor.

[0007] As further description of the above technical scheme:

[0008] The damping mechanism includes first sound-absorbing cotton, the inner wall fixed connection of first sound-absorbing cotton is in fixed hole, the outer wall fixed connection of first sound-absorbing cotton has spring, one end of spring is fixedly connected with fixed seat, the outer wall fixed connection of fixed seat has baffle, the outer wall fixed connection of baffle has spring, the outer wall fixed connection of baffle has second sound-absorbing cotton.

[0009] As further description of the above technical scheme:

[0010] The outer wall of iron body is rotatably connected with stator, and the inner wall of stator is fixedly connected with winding.

[0011] As further description of the above technical scheme:

[0012] The outer wall of stator is provided with a notch, and the surface of the notch is smoothly treated.

[0013] As further description of the above technical scheme:

[0014] The outer wall of pivot is fixedly connected with bearing, and the inner wall of bearing is fixedly connected with ball.

[0015] As further description of the above technical scheme:

[0016] The outer wall of iron body is provided with a fixed groove, and the outer wall of fixed groove is fixedly connected with permanent magnet.

[0017] As further description of the above technical scheme:

[0018] The outer wall of stator is fixedly connected with support strip, and the outer wall of support strip is fixedly connected with thermistor.

[0019] As further description of the above technical scheme:

[0020] The outer wall of axle disc is provided with a toothed groove, and the toothed groove is arranged at equal intervals around the axle disc.

[0021] The utility model has the advantages of the following:

[0022] In the utility model, the motor rotor structure realizes mechanical reinforcement by integrating the grid-shaped reinforcing ribs in the middle of the iron core, and the end part realizes rigid connection with the shaft disc through interference fit technology, forms a self-locking thread pair engagement system with the fixed shaft, adopts the fixed special embedded column at both ends of the iron core, forms the bionic swallow tail type channel on the surface of the embedded column through laser processing, assembles the shape memory alloy expansion ring in the channel, generates directional deformation when the expansion ring reaches the preset threshold, and the overall stability of the fixed assembly is improved.

[0023] In the utility model, the main sound-absorbing cotton inner wall forms rigid connection with the fixed hole, the outer wall is installed with the spring assembly, the other end of the spring is connected with the fixed seat, the outer wall of the fixed seat is integrally connected with the partition plate, the outer wall of the partition plate is simultaneously installed with the spring and the secondary sound-absorbing cotton, the main and secondary sound-absorbing cottons cooperatively reduce vibration energy through differential damping characteristics, the partition plate realizes physical isolation of the double sound-absorbing layers as the acoustic separation medium, and the spring absorbs impact kinetic energy through elastic deformation, thereby removing the vibration generated when the rotor operates. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 The utility model provides the rotor structure schematic diagram of the rotor iron core fixed assembly of the motor on anti-loosening;

[0025] Figure 2 The utility model provides the rotor structure schematic diagram of the rotor iron core fixed assembly of the motor on anti-loosening;

[0026] Figure 3 The utility model provides the rotor structure schematic diagram of the rotor iron core fixed assembly of the motor on anti-loosening; Figure 2 The utility model provides the rotor structure schematic diagram of the rotor iron core fixed assembly of the motor on anti-loosening;

[0027] Figure 4 The utility model provides the rotor structure schematic diagram of the rotor iron core fixed assembly of the motor on anti-loosening;

[0028] Figure 5 The utility model provides the rotor structure schematic diagram of the rotor iron core fixed assembly of the motor on anti-loosening;

[0029] Figure 6 The utility model provides the rotor structure schematic diagram of the rotor iron core fixed assembly of the motor on anti-loosening;

[0030] Legend:

[0031] 1, iron body; 2, damping mechanism; 201, first sound-absorbing cotton; 202, fixing hole; 203, fixing seat; 204, partition; 205, spring; 206, second sound-absorbing cotton; 3, rotating shaft; 4, reinforcing rib; 5, shaft disc; 6, fixed shaft; 7, nut; 8, embedded tube; 9, embedded groove; 10, expansion ring; 11, stator; 12, winding; 13, notch; 14, bearing; 15, ball; 16, fixing groove; 17, permanent magnet; 18, support strip; 19, thermistor; 20, toothed groove. DETAILED DESCRIPTION

[0032] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0033] Reference Figure 1 and Figure 4The utility model provides an embodiment: motor anti -loosening's rotor core fixed assembly, including the iron body 1, it forms the magnetic circuit and converts magnetic field energy into mechanical torque, drives motor rotation, the inner wall fixed connection of iron body 1 has the rotating shaft 3, it will the mechanical torque that rotor core generates transmission to external load, and provides rotation support for rotor, ensure that power efficient output, the inner wall fixed connection of iron body 1 has the reinforcing rib 4, it is used for enhancing structural strength, resists the deformation or vibration caused by centrifugal force and electromagnetic force, ensure the stability and reliability when high -speed operation of rotor, the left and right ends of reinforcing rib 4 are all fixedly connected with the axle disc 5, it passes through the overall rigidity and stability of enhancing rotor structure, effectively transmission torque and inhibit the vibration and deformation when high -speed rotation, ensure the reliable connection of rotor core and rotating shaft 3, the inner wall fixed connection of axle disc 5 has the fixed axle 6, the fixed axle 6 between axle disc 5 passes through rigid connection each axle disc 5 and keeps its relative position, the outer wall screw thread connection of fixed axle 6 has the nut 7, it passes through the axial pre -tightening force of exerting and maintaining, locks adjacent components to prevent its loosening in vibration or high -speed rotation, ensure the reliable connection and stable operation of rotor structure, the left and right sides of iron body 1 are all fixedly connected with the embedded tube 8, the outer wall of embedded tube 8 is set up with embedded groove 9, the outer wall fixed connection of embedded groove 9 has the expansion ring 10, embedded tube 8 is used for setting up embedded groove 9, embedded groove 9 is used for placing expansion ring 10, expansion ring 10 passes through the size change of elastic deformation self -adaptation compensation thermal expansion or mechanical stress, keep the close compression between the lamination, prevent loosening and maintain electromagnetic performance stability, the outer wall of rotating shaft 3 is provided with damping mechanism 2, damping mechanism 2 is used for slowing down the transverse vibration that rotor produces in motor high -speed operation, the outer wall of iron body 1 is set up with fixed groove 16, the outer wall fixed connection of fixed groove 16 has permanent magnet 17, it passes through providing constant magnetic field and current interaction, directly drive rotor rotation, realize high -efficient energy conversion, and simplify motor structure, promote power density and dynamic response performance, fixed groove 16 passes through the accurate geometric positioning and mechanical limit, ensure that permanent magnet 17 does not occur displacement or fall in high -speed rotation or vibration, maintain magnetic circuit uniformity to optimize motor electromagnetic performance simultaneously,

[0034] Specifically, the iron body 1 as the core component of the motor converts the magnetic field energy into mechanical torque efficiently through the construction of a closed magnetic circuit to drive the rotor to rotate, the inner wall of the iron body 1 is rigidly connected with the rotating shaft 3, the rotating shaft 3 bears the core function of transmitting the mechanical torque of the rotor core to the external load, and at the same time provides stable support for the rotation of the rotor, ensuring the efficiency and reliability of the power output process, the reinforcing ribs 4 arranged on the inner wall of the iron body 1 are distributed in a grid shape to significantly improve the structural strength, effectively resist the structural deformation and vibration caused by centrifugal force and electromagnetic force during high-speed operation, and ensure that the rotor still maintains excellent dynamic balance under extreme working conditions, the shaft discs 5 symmetrically welded at the left and right ends of the reinforcing ribs 4 significantly enhance the overall structural rigidity of the rotor by increasing the contact area and optimizing the stress distribution, effectively inhibiting high-frequency vibration and radial deformation during torque transmission, forming multiple mechanical interlocks between the rotating shaft 3 and the rotor core, the fixed shaft 6 precisely assembled on the inner wall of the shaft disc 5 is made of high-strength alloy material to realize the axial rigid connection of multiple shaft discs 5, and by precisely controlling the spacing and concentricity between the shaft discs 5, the continuity and integrity of the torque transmission path are ensured, the threaded structure designed on the outer wall of the fixed shaft 6 cooperates with the nut 7, and the dynamic locking effect is formed by the axial pre-tightening force generated by the threaded pair to continuously eliminate the gap between the components under severe vibration and high-speed rotation conditions, preventing the instability risk caused by loose connection, the embedded pipes 8 symmetrically distributed on both sides of the iron body 1 are provided with embedded grooves 9 of a specific depth in the pipe wall as a functional expansion interface, the expansion ring 10 assembled in the groove with interference is made of shape memory alloy material, which can compensate for the micron-level size fluctuation of the core lamination caused by temperature change and mechanical stress through the thermal elastic deformation characteristics, maintain the constant pressure between the core laminations, eliminate the distortion of the magnetic circuit, and the damping mechanism 2 integrated on the outer wall of the rotating shaft 3 is made of a nonlinear damping structure, which converts the transverse vibration energy generated by the high-speed rotation of the rotor into heat energy through a multi-stage buffering mechanism, significantly reducing the vibration amplitude conducted to the machine shell, the fixed groove 16 precisely machined on the outer wall of the iron body 1 is designed by topological optimization with the permanent magnet 17 to form three-dimensional curved surface contact, the permanent magnet 17 generates a high-strength constant magnetic field through neodymium iron boron material, interacts with the magnetic field of the stator 11 winding 12 to generate continuous tangential force, realizes direct conversion of electrical energy and mechanical energy, and reduces iron loss and copper loss while improving power density, the fixed groove 16 forms the freedom constraint of the permanent magnet 17 through nanometer-level machining precision and multi-directional limiting boss structure, and still maintains the stability of the spatial position of the magnet under the environment of super-high-speed rotation and strong vibration, ensuring that the sinusoidal degree of the air gap magnetic density waveform is more than 90%.

[0035] Referring to Figure 1 , Figure 2 and Figure 6The damping mechanism 2 comprises a first sound-absorbing cotton 201, an inner wall of the first sound-absorbing cotton 201 is fixedly connected to a fixed hole 202, an outer wall of the first sound-absorbing cotton 201 is fixedly connected with a spring 205, one end of the spring 205 is fixedly connected with a fixed seat 203, an outer wall of the fixed seat 203 is fixedly connected with a partition plate 204, an outer wall of the partition plate 204 is fixedly connected with the spring 205, an outer wall of the partition plate 204 is fixedly connected with a second sound-absorbing cotton 206, the first sound-absorbing cotton 201 and the second sound-absorbing cotton 206 cooperate with each other to offset the vibration generated by high-speed rotation of the rotor, the partition plate 204 is used for separating the first sound-absorbing cotton 201 and the second sound-absorbing cotton 206, the fixed seat 203 is used for fixing the spring 205, the spring 205 plays a certain buffering role, and the fixed hole 202 is used for reinforcing the damping mechanism 2.

[0036] Specifically, the inner wall of the first sound-absorbing cotton 201 is rigidly connected with the fixed hole 202 in an interference fit manner, the outer wall of the first sound-absorbing cotton 201 is fixedly installed with the spring 205 by spot welding process, the other end of the spring 205 is mechanically locked with the fixed seat 203 of the inverted T-shaped structure, the outer wall of the fixed seat 203 is integrally connected with the partition plate 204 in a radial distribution manner, the partition plate 204 is a core separation structure, the outer wall of the partition plate 204 is respectively in rigid contact with the second sound-absorbing cotton 206 and is elastically connected with the spring 205, the first sound-absorbing cotton 201 and the second sound-absorbing cotton 206 work cooperatively through phase-opposed vibration absorption frequencies, bidirectionally offset wideband vibration energy caused by high-speed rotation of the rotor, the partition plate 204 adopts a honeycomb aluminum core sandwich structure to realize acoustic zoning and maintain lightweight structure, the fixed seat 203 provides a multidirectional constraint installation reference for the spring 205 through a bottom flange structure, the spring 205 exhibits nonlinear stiffness characteristics through a variable-pitch design to realize gradient buffering effect under axial impact load, and the fixed hole 202 forms a torsion-resistant connection between the damping mechanism 2 and a chassis base frame through a penetrating bolt to improve overall modal stiffness of the system.

[0037] Referring to Figure 2 , Figure 3 and Figure 5, the outer wall of the iron body 1 is rotationally connected with a stator 11, the inner wall of the stator 11 is fixedly connected with a winding 12, the winding 12 generates a rotating magnetic field through input current, interacts with the rotor magnetic field to form an electromagnetic torque, drives the motor to rotate to realize efficient conversion of electric energy to mechanical energy, the stator 11 generates a rotating magnetic field through the winding 12 current, interacts with the rotor magnetic field to drive the rotor to rotate, realizes the conversion of electric energy to mechanical energy, and ensures the efficient and stable operation of electromagnetic coupling, the outer wall of the stator 11 is provided with a notch 13, the surface of the notch 13 is treated with smoothness, the notch 13 is used for fixing the predetermined assembly, the outer wall of the rotating shaft 3 is fixedly connected with a bearing 14, which supports the rotating movement of the rotor through low friction, bears radial and axial load, maintains uniform air gap and reduces energy loss, ensures efficient and stable operation of the motor, the inner wall of the bearing 14 is fixedly connected with a ball 15, which replaces sliding friction with rolling friction, reduces movement resistance and uniformly disperses load, ensures smooth rotation of the bearing 14, reduces wear, and at the same time improves bearing capacity and service life, the outer wall of the stator 11 is fixedly connected with a support strip 18, which reliably transmits resistance change signals to the monitoring circuit, realizes accurate detection and control of temperature change, and ensures stable electrical connection between the thermosensitive element and the system, the outer wall of the support strip 18 is fixedly connected with a thermistor 19, which converts resistance value change into electrical signal by monitoring temperature change of the winding 12 or key position in real time, triggers an overheating protection mechanism to prevent insulation damage or performance degradation, and ensures safe operation of the motor, the outer wall of the shaft disc 5 is provided with a toothed groove 20, the toothed groove 20 is arranged at equal intervals around the shaft disc 5;

[0038] Specifically, the outer wall of the iron body 1 is in precise dynamic fit connection with the stator 11, the inner wall of the stator 11 is fixedly installed with the winding 12 by vacuum impregnation process, the winding 12 generates a rotating magnetic field with a space sinusoidal distribution after three-phase alternating current is passed, the magnetic field interacts with the rotor magnetic field generated by the permanent magnet 17 of the iron body 1 in a tangential direction, a continuous electromagnetic torque is generated to drive the rotor to realize electromechanical energy conversion, the stator 11 significantly reduces the amplitude of tooth harmonic magnetic potential and effectively improves the stability of electromagnetic torque output by optimizing the short-distance distribution and slant slot design of the winding 12, the outer wall of the stator 11 is milled by a five-axis machining center to form a depth-controllable notch 13, the edge of the notch 13 is rounded to eliminate stress concentration, the notch 13 serves as a standard installation reference surface to provide geometric positioning constraints for subsequent component assembly, the outer wall of the rotating shaft 3 is assembled with the bearing 14 by hot mounting process, the bearing 14 adopts an angular contact ball bearing 14 configuration, the inner and outer ring raceways are super-precision ground, and reasonable distribution of radial load and axial load is realized by optimizing the contact angle parameter, so that the rotor system still maintains a normal level of dynamic eccentricity under good working conditions, the inner ring raceway of the bearing 14 is precisely assembled with the ball 15, the ball 15 is made of silicon nitride ceramic material, the arrangement density is optimized by multi-body dynamics simulation, so that the temperature rise of the bearing 14 under extreme speed is controlled within forty-five k, the outer wall of the stator 11 is fixedly provided with the support strip 18 made of titanium alloy material by laser welding, the support strip 18 is embedded with platinum wire to form a four-wire measurement loop, milliohm resolution acquisition of resistance value change of the thermistor 19 is realized, the outer wall of the support strip 18 is bonded with the thermistor 19 by conductive silver glue, the thermistor 19 selects a PT type thin film element, and the temperature rise gradient caused by copper loss of the winding 12 is monitored in real time, and the IGBT is turned off to protect when the threshold value is one hundred forty-five degrees Celsius, the outer wall of the shaft disc 5 is formed with sixty involute tooth-shaped grooves 20 by gear shaping, the tooth-shaped grooves 20 are designed by using standard gear parameters with a module of one point five, and the precise positioning structure with a phase error of less than three angular seconds is formed by equidistant distribution along the circumference.

[0039] Working principle: firstly, the motor rotor structure is realized by the reinforcing rib 4 in the middle of the iron body 1 to realize the core mechanical property optimization, the reinforcing rib 4 is embedded in the iron body 1 in the form of grid welding with titanium alloy material, a three-dimensional reinforcing framework is formed, the both ends are rigidly connected with the shaft disc 5 through interference fit, the outer diameter side of the shaft disc 5 is precisely turned to form a standard thread, and the fixed shaft 6 is realized by thread pair engagement, the both ends of the iron body 1 are fixedly embedded in the pipe 8 by electron beam welding process, the surface of the embedded pipe 8 is engraved with a dovetail type embedded groove 9, the embedded groove 9 is filled with an expansion ring 10 made of shape memory alloy material, when the motor operating temperature reaches eighty degrees Celsius, the expansion ring 10 produces radial expansion, dynamically compensates the thermal expansion difference of the core laminations, the surface of the fixed shaft 6 is processed with a trapezoidal thread, and the nut 7 forms an axial pre-tightening mechanism, when the torque locking is applied, the nut 7 produces axial compression force, the contact surface pressure of the shaft disc 5 and the reinforcing rib 4 is increased, the working principle of the structure system can be divided into three levels: the mechanical level, the reinforcing rib 4 improves the bending stiffness of the iron body 1 to the basic value of eighty percent through the grid support, the shaft disc 5 and the fixed shaft 6 form the main path of torque transmission, and the electromagnetic torque conversion efficiency is improved to ninety percent; the thermal management level, the phase change temperature of the expansion ring 10 is set in the sensitive interval of seventy-five degrees, when the winding 12 temperature rise causes the core laminations to produce thermal expansion, the expansion ring 10 generates compensation displacement through the shape memory effect, and maintains the lamination pressing precision; the dynamic stability level, the pre-tightening force generated by the nut 7 forms axial constraint, cooperates with the rigid support of the fixed shaft 6, and improves the first-order critical speed of the rotor by forty percent compared with the traditional structure;

[0040] And, the damping mechanism 2 is achieved by a multi-layer composite structure to realize wide-band vibration suppression, the inner wall of the first sound-absorbing cotton 201 is permanently connected with the fixed hole 202 by means of epoxy resin bonding, and the outer wall is fixedly installed with the spring 205 through a laser spot welding process, the spiral end of the spring 205 is cold-formed and connected with the ball socket structure of the fixed seat 203 to form a universal joint, the outer wall of the fixed seat 203 is treated by anodic oxidation to form a corrosion-resistant connection interface with the baffle 204, the baffle 204 is made of a hollow composite plate, and the outer wall is connected with the spring 205 and the second sound-absorbing cotton 206 through nano welding technology to form a bidirectional damping topology, the first sound-absorbing cotton 201 selects melamine foam as the core material, the second sound-absorbing cotton 206 adopts a gradient density design, and the two work cooperatively through different vibration absorption frequency bands to produce a noise reduction effect at the rotor speed, the baffle 204 is composed of a thick aluminum substrate and a layer of acoustic metamaterial, forming a sound wave band gap, effectively blocking the structure noise transmission path, the fixed seat 203 is provided with a threaded blind hole to provide a multi-degree-of-freedom adjustment base for the spring 205, the spring 205 is made of steel wire and has a variable pitch design to realize nonlinear stiffness characteristics, and can respond to frequency vibration within a few milliseconds, the fixed hole 202 is a precision hole system, and the damping mechanism 2 is rigidly connected with the machine base through high-strength bolts, the bolt pre-tightening force is optimized to a certain extent by using finite element analysis, so that the system modal frequency is avoided from the motor working frequency band, and the working principle presents a three-stage attenuation mechanism: in the primary attenuation stage, the wide-band vibration generated by the rotor reaches the first sound-absorbing cotton 201 through the transmission path, half of the vibration energy is consumed through the cavity resonance of the porous material, and the axial damping effect of the spring 205 is activated synchronously, in the intermediate attenuation stage, the remaining vibration energy is transmitted to the mass-spring 205 system composed of the fixed seat 203 and the baffle 204, and the vibration phase is converted by using the nonlinear stiffness of the spring 205, in the final attenuation stage, the residual high-frequency vibration penetrating the baffle 204 is absorbed by the gradient density structure of the second sound-absorbing cotton 206, and the wave vector regulation characteristics of the acoustic metamaterial baffle 204 are combined.

[0041] Finally, it should be pointed out that: the above only describes preferred embodiments of the present application and is not intended to limit the present application, although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent replacement for some technical features, and any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A rotor core fixing assembly for preventing loosening on an electric machine, comprising a ferrous body (1), characterized in that: The inner wall of the iron body (1) is fixedly connected with a rotating shaft (3), the inner wall of the iron body (1) is fixedly connected with a reinforcing rib (4), the left and right ends of the reinforcing rib (4) are fixedly connected with an axle disc (5), the inner wall of the axle disc (5) is fixedly connected with a fixed shaft (6), the outer wall of the fixed shaft (6) is threadedly connected with a nut (7), the left and right sides of the iron body (1) are fixedly connected with an embedded pipe (8), the outer wall of the embedded pipe (8) is provided with an embedded groove (9), the outer wall of the embedded groove (9) is fixedly connected with an expansion ring (10), and the outer wall of the rotating shaft (3) is provided with a damping mechanism (2).

2. The anti-looseness rotor core fixing assembly on the motor of claim 1, characterized in that: The damping mechanism (2) comprises a first sound-absorbing cotton (201), the inner wall of the first sound-absorbing cotton (201) is fixedly connected with a fixed hole (202), the outer wall of the first sound-absorbing cotton (201) is fixedly connected with a spring (205), one end of the spring (205) is fixedly connected with a fixed seat (203), the outer wall of the fixed seat (203) is fixedly connected with a partition plate (204), the outer wall of the partition plate (204) is fixedly connected with a spring (205), and the outer wall of the partition plate (204) is fixedly connected with a second sound-absorbing cotton (206).

3. The anti-looseness rotor core fixing assembly on the motor of claim 1, characterized in that: The outer wall of the iron body (1) is rotatably connected with a stator (11), and the inner wall of the stator (11) is fixedly connected with a winding (12).

4. The anti-looseness rotor core fixing assembly on the motor of claim 3, characterized in that: The outer wall of the stator (11) is provided with a notch (13), and the surface of the notch (13) is treated in a smooth manner.

5. The anti-looseness rotor core fixing assembly on the motor of claim 1, wherein: The outer wall of the rotating shaft (3) is fixedly connected with a bearing (14), and the inner wall of the bearing (14) is fixedly connected with a ball (15).

6. The anti-looseness rotor core fixing assembly on the motor of claim 1, wherein: The outer wall of the iron body (1) is provided with a fixed groove (16), and the outer wall of the fixed groove (16) is fixedly connected with a permanent magnet (17).

7. The anti-loose rotor core fixing assembly on the motor of claim 3, characterized in that: The outer wall of the stator (11) is fixedly connected with a support strip (18), and the outer wall of the support strip (18) is fixedly connected with a thermistor (19).

8. The anti-looseness rotor core fixing assembly on the motor of claim 1, characterized in that: The outer wall of the axle disc (5) is provided with a toothed groove (20), and the toothed grooves (20) are arranged at equal intervals around the axle disc (5).

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