High adaptability wide voltage vibration motor

Abstract

The application relates to the technical field of vibration motors, and relates to a high-adaptability wide-voltage vibration motor which comprises a shell, a stator is arranged in the shell, a rotating shaft is arranged in the shell in a rotating mode, a rotor is fixedly sleeved on the rotating shaft, a plurality of groups of pole shoes are arranged in a circumferential distribution mode on the inner circular surface of the stator, the pole shoes comprise fixed pole shoes and two movable pole shoes, the fixed pole shoes are fixedly arranged on the inner circular surface of the stator, the circumferential direction two sides of the fixed pole shoes are inclined surfaces, the two movable pole shoes are respectively located on the circumferential direction two sides of the fixed pole shoes, the side of the movable pole shoes, which faces the fixed pole shoes, is in sliding fit with the fixed pole shoes, the adjacent end portions of the two movable pole shoes are fixedly connected through a connecting plate, an adjusting rod is fixedly connected on one connecting plate, the adjusting rod is arranged in a radial direction, the outer end of the adjusting rod penetrates through the shell and extends to the outside of the shell, the adjusting rod is in screw connection with the shell, and eccentric vibration assemblies are arranged at the two ends of the rotating shaft; the output stability and controllability of the vibration motor under different power supply environments are improved.

Description

Technical Field

[0001] This invention relates to the field of vibration motor technology, and in particular to a highly adaptable wide-voltage vibration motor. Background Technology

[0002] A vibratory motor is a specialized power device that converts electrical energy into mechanical vibration. It is widely used in mobile communication equipment, medical devices, industrial vibratory feeders, and massage devices. Based on their working principle, vibratory motors are mainly divided into two categories: eccentric rotary vibratory motors and linear reciprocating vibratory motors. Eccentric rotary vibratory motors dominate the market due to their simple structure and stable vibration output. The core feature of this type of motor is the presence of an eccentric mass on the rotor. When the motor runs, the centrifugal force generated by the eccentric mass drives the entire machine to vibrate. The vibration frequency is directly related to the motor speed, while the vibration amplitude depends on both the eccentricity and the square of the rotational speed.

[0003] In practical engineering applications, the power supply environment for vibratory motors often experiences significant voltage fluctuations. Taking industrial automated production lines as an example, the same vibratory feeding system may need to operate under different regional power grid conditions, with voltage specifications covering multiple levels such as AC110V, AC 220V, and even AC 380V. This objective requirement for a wide voltage input range poses a severe challenge to the adaptability of vibratory motors.

[0004] In existing technologies, vibration motors are typically designed for a specific rated voltage, with the stator winding turns, wire diameter, and magnetic circuit parameters optimized for rated operating conditions. When the input voltage deviates from the design value, the motor's electromagnetic performance changes significantly: when the voltage decreases, the electromagnetic torque decreases; if the load torque remains constant, the motor speed decreases, leading to a synchronous decay in vibration frequency and amplitude, and in severe cases, even failure to start or stalling and burnout. When the voltage increases, the magnetic circuit tends to saturate, iron and copper losses increase sharply, the motor temperature rises excessively, insulation aging accelerates, and the increased vibration due to the increased speed may exceed the allowable range of the equipment's mechanical strength, causing structural fatigue or loose connections. Therefore, the effective operating voltage range of traditional vibration motors is usually only about ±10% of the rated voltage, which is insufficient to meet the needs of wide-voltage application scenarios.

[0005] In summary, existing vibration motors have significant shortcomings in terms of wide voltage adaptability. There is an urgent need for a new type of vibration motor structure that can maintain stable vibration output characteristics under wide voltage input conditions, so as to take into account the comprehensive requirements of voltage adaptability, operating efficiency, output stability and structural reliability. Summary of the Invention

[0006] The purpose of this invention is to overcome the shortcomings of the prior art by proposing a highly adaptable wide-voltage vibration motor.

[0007] To achieve the above objectives, the present invention adopts the following technical solution: A highly adaptable wide-voltage vibration motor includes a housing, within which a stator is installed. A rotating shaft is rotatably mounted within the housing, and a rotor is fixedly sleeved on the rotating shaft. The rotor is located inside the stator. Multiple sets of pole shoes are circumferentially distributed on the inner surface of the stator. Each pole shoe includes a fixed pole shoe and two movable pole shoes. The fixed pole shoe is fixedly mounted on the inner surface of the stator, with its side facing the rotor being an arc surface and its two circumferential sides being inclined surfaces. The two movable pole shoes are located on opposite sides of the fixed pole shoe's circumference, and their sides facing the fixed pole shoe are in sliding engagement with it. The side of the movable pole shoe facing the rotor is an arc surface. Both ends of the movable pole shoe extend to the outside of the stator. The adjacent ends of the two movable pole shoes are fixedly connected by a connecting plate. The two movable pole shoes and the two connecting plates form a frame structure that is fitted onto the outside of the fixed pole shoe. An adjusting rod is fixedly connected to one of the connecting plates. The adjusting rod is arranged radially and its outer end passes through the housing and extends to the outside of the housing. The adjusting rod is threadedly connected to the housing. The adjusting rod is used to push the movable pole shoe to slide along the inclined surface of the fixed pole shoe to change the air gap between the arc surface of the movable pole shoe and the outer circle of the rotor. Eccentric vibration components are provided at both ends of the rotating shaft.

[0008] Preferably, a guide post is fixedly connected to another connecting plate, and the guide post slides through the housing.

[0009] Preferably, a cylindrical body is fixedly connected to the outer wall of the housing, the cylindrical body is located outside the adjusting rod, and a screwing part is fixedly connected to one end of the adjusting rod located outside the housing. Scale markings are provided on the cylindrical body along the axial direction of the adjusting rod.

[0010] Preferably, a sealing plug is provided at the top of the cylinder.

[0011] Preferably, the cylinder is provided with a locking nut, which is threadedly connected to the adjusting rod.

[0012] Preferably, the fixed pole shoe is integrally formed with the stator core.

[0013] Preferably, the radius of the arc surface of the movable pole shoe is smaller than the radius of the arc surface of the fixed pole shoe.

[0014] Preferably, the eccentric vibration assembly includes a main eccentric mass block fixed to one side of the rotating shaft. The main eccentric mass block has a fan-shaped structure. A radial plate is fixedly connected to the rotating shaft. The radial plate and the main eccentric mass block are respectively disposed on both sides of the rotating shaft. A radial groove is formed on the surface of the radial plate away from the rotor. A slider is slidably connected in the radial groove. A secondary eccentric mass block is fixed on the slider. A first permanent magnet is embedded at one end of the radial groove near the rotating shaft. A second permanent magnet is correspondingly embedded at one end of the slider near the first permanent magnet. The first permanent magnet and the second permanent magnet have opposite poles. The weight of the main eccentric mass block is greater than the weight of the secondary eccentric mass block.

[0015] Preferably, both ends of the radial groove are provided with limiting platforms, which are located between the slider and both ends of the radial groove.

[0016] Compared with the prior art, the beneficial effects of the present invention are: This invention utilizes a multi-set pole shoe structure with circumferentially distributed pole shoes on the inner surface of the stator to achieve manual, leveled adjustment of the air gap between the stator and rotor. This allows the same motor to adapt to power supply environments with different voltage levels, significantly expanding the voltage application range of the vibratory motor and solving the problem of numerous equipment specifications and high inventory management costs caused by the traditional single-voltage-one-model vibratory motor. The invention employs a sliding fit structure between the inclined surfaces on both sides of the fixed pole shoe and the movable pole shoe. By rotating the adjusting rod, the movable pole shoe slides along the inclined surface, causing the arc surface of the movable pole shoe to bulge or retract radially, thereby changing the dynamic range of the vibratory motor. The air gap between the arc surface of the moving pole shoe and the outer circle of the rotor decreases, the magnetic reluctance decreases, and the magnetic flux increases at low voltage levels, which can generate sufficient electromagnetic torque at low voltage. At high voltage levels, the air gap returns to the maximum air gap of the fixed pole shoe, the magnetic reluctance increases, and the magnetic flux decreases, preventing magnetic circuit saturation and excessive speed increase at high voltage, thus realizing device-level active adjustment of electromagnetic characteristics. This structural design realizes wide voltage adaptive device-level control, which significantly improves the output stability and controllability of the vibratory motor under different power supply environments, and is particularly suitable for industrial vibratory feeding systems that need to operate under multiple regional power grid conditions. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a partial structural diagram of the present invention. Figure 1 ; Figure 3 for Figure 2 Enlarged view of point A in the middle; Figure 4 for Figure 2 Enlarged view of point B in the middle; Figure 5 for Figure 2 Enlarged view of point C in the middle; Figure 6 This is a partial structural diagram of the present invention. Figure 2 ; Figure 7 for Figure 6 Enlarged view of point D in the middle; Figure 8 This is a partial cross-sectional view of the present invention.

[0018] In the diagram: 1. Housing; 2. Stator; 3. Shaft; 4. Rotor; 5. Fixed pole shoe; 6. Movable pole shoe; 7. Connecting plate; 8. Adjusting rod; 9. Guide column; 10. Cylinder; 11. Tightening part; 12. Scale mark; 13. Sealing plug; 14. Locking nut; 15. Main eccentric mass block; 16. Radial plate; 17. Radial groove; 18. Slider; 19. Secondary eccentric mass block; 20. First permanent magnet; 21. Second permanent magnet; 22. Limiting stage. Detailed Implementation

[0019] To make the objectives, features, and advantages of this invention more apparent and understandable, the technical solutions of the embodiments of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described below are only some embodiments of this invention, and not all embodiments. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0020] like Figure 1-8As shown, this embodiment of the invention provides a highly adaptable wide-voltage vibration motor, including a housing 1, a stator 2 installed inside the housing 1, a rotating shaft 3 rotatably disposed inside the housing 1, and a rotor 4 fixedly sleeved on the rotating shaft 3. The rotor 4 is located inside the stator 2. Multiple sets of pole shoes are circumferentially distributed on the inner circular surface of the stator 2. The pole shoes are characterized in that they include fixed pole shoes 5 and two movable pole shoes 6. The fixed pole shoes 5 are fixedly disposed on the inner circular surface of the stator 2, the side of the fixed pole shoe 5 facing the rotor 4 is an arc surface, and the two circumferential sides of the fixed pole shoe 5 are inclined surfaces. The two movable pole shoes 6 are respectively located on both sides of the circumferential direction of the fixed pole shoe 5, and the side of the movable pole shoes 6 facing the fixed pole shoe 5 is connected to the fixed pole shoe 5. The fixed pole shoe 5 is slidably fitted, and the movable pole shoe 6 has an arc surface facing the rotor 4. Both ends of the movable pole shoe 6 extend to the outside of the stator 2. The adjacent ends of the two movable pole shoes 6 are fixedly connected by a connecting plate 7. The two movable pole shoes 6 and the two connecting plates 7 form a frame structure that is fitted on the outside of the fixed pole shoe 5. An adjusting rod 8 is fixedly connected to one of the connecting plates 7. The adjusting rod 8 is arranged radially and its outer end passes through the housing 1 and extends to the outside of the housing 1. The adjusting rod 8 is threadedly connected to the housing 1. The adjusting rod 8 is used to push the movable pole shoe 6 to slide along the inclined surface of the fixed pole shoe 5 to change the air gap between the arc surface of the movable pole shoe 6 and the outer circle of the rotor 4. Eccentric vibration components are provided at both ends of the rotating shaft 3.

[0021] By rotating the adjusting rod 8, the movable pole shoe 6 can be pushed to slide along the inclined surface of the fixed pole shoe 5, thereby precisely adjusting the air gap size between the arc surface of the movable pole shoe 6 and the outer circle of the rotor 4, realizing the mechanical dynamic adjustment of the magnetic flux. At the same time, eccentric vibration components are set at both ends of the rotating shaft 3. When the input voltage fluctuates and the motor speed changes, the inertial mass distribution of the eccentric vibration components can respond to the speed change. The air gap structure after coordinated adjustment stabilizes the output vibration amplitude, avoiding the phenomenon of drastic attenuation or instability of vibration intensity caused by voltage fluctuations in traditional vibration motors. Thus, the consistency and reliability of vibration output characteristics are maintained under wide voltage input conditions.

[0022] Specifically, a guide post 9 is fixedly connected to another connecting plate 7, and the guide post 9 slides through the housing 1. The guide post 9 and the adjusting rod 8 together form a two-way constraint mechanism for the frame structure, so that when the two movable pole shoes 6 slide along the inclined surface of the fixed pole shoe 5 under the radial push of the adjusting rod 8, their movement direction is precisely limited by the guide post 9 to only radial translation. This effectively prevents the movable pole shoes 6 from deflecting or displacing laterally due to uneven force, thereby ensuring that the air gap between the arc surface of the two movable pole shoes 6 and the outer circle of the rotor 4 remains uniform, stable and repeatedly adjustable. This avoids vibration output fluctuations caused by structural jamming or air gap offset, and significantly improves the stability and consistency of the motor's vibration characteristics under wide voltage input conditions.

[0023] Specifically, a cylinder 10 is fixedly connected to the outer wall of the housing 1. The cylinder 10 is located outside the adjusting rod 8. A screwing part 11 is fixedly connected to one end of the adjusting rod 8 located outside the housing 1. A scale mark 12 is provided on the cylinder 10 along the axial direction of the adjusting rod 8. The operator can apply rotational force through the screwing part 11 to drive the adjusting rod 8 to move radially along the thread, thereby causing the movable pole shoe 6 to slide along the inclined surface of the fixed pole shoe 5, realizing precise adjustment of the air gap between the arc surface of the movable pole shoe 6 and the outer circle of the rotor 4. The outer surface of the cylinder 10 is provided with a scale mark 12 along the axial direction of the adjusting rod 8. When the adjusting rod 8 undergoes axial displacement due to screwing, its position change can be directly visually identified through the scale mark 12, enabling the operator to accurately reproduce a certain air gap setting position according to the preset scale value, eliminating adjustment deviations caused by differences in human experience, ensuring the consistency and repeatability of air gap adjustment under different voltage input conditions, and improving the output stability of the vibration motor in a wide voltage range.

[0024] Specifically, a sealing plug 13 is provided at the top of the cylinder 10. The cylinder 10 is fixedly connected to the outer wall of the housing 1 and surrounds the exposed section of the adjusting rod 8. The sealing plug 13 at its top can effectively seal the upper opening of the cylinder 10, preventing external dust, moisture or impurities from entering the housing through the gap at the threaded connection between the adjusting rod 8 and the housing 1. This avoids the threaded part of the adjusting rod 8 from getting stuck, loosening or failing to adjust due to dust accumulation or corrosion, and ensures that the adjusting rod 8 can still stably push the movable pole shoe 6 to slide smoothly along the inclined surface of the fixed pole shoe 5 during long-term use, and accurately control the air gap size.

[0025] Specifically, a locking nut 14 is provided inside the cylinder 10, and the locking nut 14 is threadedly connected to the adjusting rod 8. After the air gap between the movable pole shoe 6 and the outer circle of the rotor 4 is adjusted to the target position by the screwing part 11, the locking nut 14 can be tightened axially along the adjusting rod 8, so that it is tightly attached to the outer surface of the housing 1. Thus, a double axial locking structure is formed on the basis of the threaded connection between the adjusting rod 8 and the housing 1, which effectively counteracts the tendency of the adjusting rod 8 to loosen due to high-frequency vibration during motor operation, prevents the movable pole shoe 6 from changing the electromagnetic force distribution due to air gap drift, and ensures that the vibration output characteristics remain stable under wide voltage input conditions.

[0026] The scale markings 12 on the cylinder 10 can help the operator accurately identify the axial displacement of the adjusting rod 8. Combined with the locking function of the locking nut 14, the air gap can be repeatedly set and maintained for a long time, which significantly improves the reliability and consistency of the equipment under complex working conditions.

[0027] Specifically, the fixed pole shoe 5 and the stator 2 core are integrally formed. This integral forming eliminates the assembly interface between the fixed pole shoe 5 and the stator 2 core during motor operation, completely eliminating the risk of relative displacement due to vibration or thermal expansion and contraction. This ensures that the arc surface of the fixed pole shoe 5 facing the rotor 4 always serves as a stable magnetic circuit reference surface, providing a precise and repeatable reference positioning for the two movable pole shoes 6 to slide along its inclined surface to adjust the air gap. Since the air gap adjustment between the arc surface of the movable pole shoe 6 and the outer circle of the rotor 4 depends entirely on the geometric stability of this reference surface, the integral structure significantly improves the accuracy and consistency of air gap control. This allows the motor to maintain stable magnetic flux density and vibration output characteristics even under wide voltage input conditions, avoiding the magnetic circuit fluctuations and output instability problems caused by small gaps or looseness in traditional split pole shoes.

[0028] Specifically, the radius of the arc surface of the movable pole shoe 6 is smaller than that of the arc surface of the fixed pole shoe 5. When the adjusting rod 8 pushes the movable pole shoe 6 to slide inward along the inclined surface of the fixed pole shoe 5, the arc surface of the movable pole shoe 6 can protrude to a position closer to the rotor than the fixed pole shoe 5. This reduces the air gap between the movable pole shoe 6 and the outer circle of the rotor 4 to a level lower than the initial air gap between the fixed pole shoe 5 and the rotor 4 under low voltage conditions, significantly improving the local magnetic flux density and effectively compensating for the electromagnetic torque attenuation caused by the reduction in input voltage, thus achieving stable maintenance of vibration output characteristics. This structural design, through the synergistic effect of the difference in geometric radius and the inclined surface sliding, enables the air gap adjustment to have nonlinear enhancement capabilities. Without increasing the number of coil turns or current, it accurately responds to voltage fluctuations and ensures the consistency of vibration intensity over a wide voltage input range.

[0029] Specifically, the eccentric vibration assembly includes a main eccentric mass block 15 fixed to one side of the rotating shaft 3. The main eccentric mass block 15 has a fan-shaped structure. A radial plate 16 is fixedly connected to the rotating shaft 3. The radial plate 16 and the main eccentric mass block 15 are respectively arranged on both sides of the rotating shaft 3. A radial groove 17 is opened on the surface of the radial plate 16 away from the rotor 4. A slider 18 is slidably connected in the radial groove 17. A secondary eccentric mass block 19 is fixed on the slider 18. A first permanent magnet 20 is embedded at one end of the radial groove 17 near the rotating shaft 3. A second permanent magnet 21 is correspondingly embedded at one end of the slider 18 near the first permanent magnet 20. The first permanent magnet 20 and the second permanent magnet 21 have opposite poles facing each other. The weight of the main eccentric mass block 15 is greater than the weight of the secondary eccentric mass block 19.

[0030] When the speed of the vibratory motor changes due to fluctuations in the power supply voltage, the rotating shaft 3 drives the main eccentric mass block 15 and the radial plate 16 to rotate synchronously. The main eccentric mass block 15 has a fan-shaped structure and is fixed to one side of the rotating shaft 3. Its mass is greater than that of the secondary eccentric mass block 19, so that the overall eccentric tendency always tends to the side of the main eccentric mass block 15, ensuring that the vibration direction remains unchanged. The radial plate 16 is located on the other side of the rotating shaft 3, and a slider 18 is slidably connected in the radial groove 17 opened on its surface. The secondary eccentric mass block 19 is fixed on the slider 18.

[0031] As the rotational speed increases, the secondary eccentric mass 19 slides outward along the radial groove 17 due to the increased centrifugal force, attempting to increase its eccentricity on the opposite side. Simultaneously, the first permanent magnet 20, embedded in the radial groove 17 near the shaft 3, and the second permanent magnet 21 corresponding to the end of the slider 18, generate a continuous radial attraction due to their opposite poles. This attraction pulls the slider 18 back towards the shaft 3, thus suppressing excessive outward movement of the secondary eccentric mass 19. Since the main eccentric mass 15 is heavier than the secondary eccentric mass 19, the system exhibits a self-regulating characteristic of mass imbalance. The outward movement tendency of the secondary eccentric mass 19 and the magnetic restoring force reach a dynamic balance, causing the total eccentricity to decrease as the rotational speed increases. The decrease in the total eccentricity partially offsets the increasing vibration amplitude caused by the increased rotational speed, stabilizing the vibration output.

[0032] When the rotational speed decreases, the centrifugal force on the secondary eccentric mass 19 weakens, and the magnetic attraction between the first permanent magnet 20 and the second permanent magnet 21 becomes stronger, pulling the slider 18 back along the radial groove 17 towards the rotating shaft 3, causing the secondary eccentric mass 19 to slide inward. At this time, the fixed eccentricity of the main eccentric mass 15 remains unchanged, while the inward movement of the secondary eccentric mass 19 reduces the reverse eccentricity on its opposite side, resulting in a corresponding increase in the total eccentricity. The increase in the total eccentricity compensates for the attenuation trend of vibration amplitude caused by the decrease in rotational speed, preventing the vibration output from weakening excessively.

[0033] Through the aforementioned bidirectional dynamic adjustment mechanism that automatically reduces the total eccentricity when the rotational speed increases and automatically increases the total eccentricity when the rotational speed decreases, the fluctuation of vibration amplitude within a wide voltage range is significantly suppressed, thereby improving the consistency and reliability of vibration output.

[0034] Specifically, both ends of the radial groove 17 are provided with limiting platforms 22, which are located between the slider 18 and the two ends of the radial groove 17. When the rotation of the shaft 3 causes the centrifugal force to increase, the slider 18 slides outward in the radial groove 17 due to centrifugal force, and at the same time returns inward due to the attraction between the second permanent magnet 20 and the first permanent magnet 21. The limiting platforms 22 effectively constrain the maximum displacement range of the slider 18, prevent the slider 18 from directly colliding with the end of the groove 17, avoid the secondary eccentric mass block 19 from becoming loose or broken due to impact, and prevent the second permanent magnet 21 and the first permanent magnet 20 from making hard contact under extreme working conditions, ensuring the stability of the alignment relationship between the magnetic poles of the two permanent magnets, maintaining the continuity and controllability of the dynamic adjustment of the eccentricity, thereby ensuring that the vibration output amplitude remains stable under fluctuating power supply voltage, and improving the overall reliability and lifespan of the motor.

[0035] The process of the technical solution of this application is described below: When the power supply voltage changes, the operator first stops the machine and removes the sealing plug 13 at the top of the cylinder 10. Then, the operator rotates the adjusting rod 8 through the screwing part 11. The adjusting rod 8 moves axially due to its threaded connection with the housing 1, causing a connecting plate 7 and two movable pole shoes 6 fixedly connected to it to slide along the inclined surface of the fixed pole shoe 5, thereby changing the air gap between the arc surface of the movable pole shoe 6 and the outer circle of the rotor 4. During the adjustment process, the guide post 9 fixedly connected to the other connecting plate 7 slides along the housing 1, ensuring that the frame structure formed by the two movable pole shoes 6 and the two connecting plates 7 moves smoothly only radially along the housing 1, avoiding deflection or jamming. The voltage is adjusted to the corresponding voltage. After setting the gear position, the operator tightens the locking nut 14, which is threaded onto the adjusting rod 8 inside the cylinder 10, so that it abuts against the housing 1, forming an axial locking structure. Then, the sealing plug 13 is reinstalled to seal the opening of the cylinder 10. After restarting the motor, the rotating shaft 3 drives the rotor 4 to rotate. The change in the air gap formed by the fixed pole shoe 5 and the movable pole shoe 6 on the inner circular surface of the stator 2 causes a corresponding adjustment in the magnetic circuit reluctance, thereby compensating for electromagnetic torque fluctuations caused by voltage changes and stabilizing the rotational speed. Simultaneously, the main eccentric mass blocks 15 at both ends of the rotating shaft 3 rotate synchronously with the radial plate 16. The main eccentric mass blocks 15 have a fan-shaped structure and are fixed to one side of the rotating shaft 3. The secondary eccentric mass blocks 19 rotate on the radial plate 16 via the slider 18. Sliding within the radial groove 17, when the rotational speed increases due to voltage fluctuations, the centrifugal force on the secondary eccentric mass block 19 increases, pushing the slider 18 outward along the radial groove 17. However, the second permanent magnet 21 embedded at the end of the slider 18 and the first permanent magnet 20 embedded at the end of the radial groove 17 near the rotating shaft 3 generate radial attraction due to their opposite poles, inhibiting excessive outward movement of the slider 18 and appropriately reducing the total eccentricity. The reduction in the total eccentricity partially offsets the increasing vibration amplitude caused by the increase in rotational speed, making the vibration output tend to stabilize. When the rotational speed decreases, the centrifugal force weakens, and the attraction between the first permanent magnet 20 and the second permanent magnet 21 pulls the slider 18 back towards the rotating shaft 3, increasing the total eccentricity. The increased center distance compensates for the attenuation trend of vibration amplitude caused by the decrease in rotational speed, preventing the vibration output from weakening excessively. The limiting platforms 22 set at both ends of the radial groove 17 limit the maximum displacement range of the slider 18, preventing the slider 18 from directly impacting the end of the radial groove 17 and from making hard contact with the permanent magnet. The weight of the main eccentric mass block 15 is greater than the weight of the secondary eccentric mass block 19, ensuring that the total eccentricity direction always points to the side of the main eccentric mass block, and the vibration direction is stable. The adjustable pole shoe assembly is used to manually adjust the air gap across voltage ranges, and combined with the eccentric vibration assembly, automatic eccentricity compensation is achieved for voltage fluctuations within the same range, so that vibration amplitude fluctuations are suppressed, and stable vibration output is achieved under a wide voltage range.

[0036] All contents not described in detail in the specification are existing technologies known to those skilled in the art, and the model parameters of each electrical appliance are not specifically limited; conventional equipment can be used. Electrical control components not mentioned in this technical solution are not shown in the figures because they are existing technologies, and will not be described here.

[0037] The above are merely preferred embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A highly adaptable wide-voltage vibration motor, comprising a housing (1), a stator (2) installed inside the housing (1), a rotating shaft (3) rotatably disposed inside the housing (1), a rotor (4) fixedly sleeved on the rotating shaft (3), the rotor (4) located inside the stator (2), and multiple sets of pole shoes circumferentially distributed on the inner circular surface of the stator (2), characterized in that, The pole shoes include a fixed pole shoe (5) and two movable pole shoes (6). The fixed pole shoe (5) is fixedly disposed on the inner circular surface of the stator (2). The side of the fixed pole shoe (5) facing the rotor (4) is an arc surface, and the two circumferential sides of the fixed pole shoe (5) are inclined surfaces. The two movable pole shoes (6) are respectively located on both sides of the fixed pole shoe (5) in the circumferential direction. The side of the movable pole shoe (6) facing the fixed pole shoe (5) is in sliding engagement with the fixed pole shoe (5). The side of the movable pole shoe (6) facing the rotor (4) is an arc surface. The two ends of the movable pole shoes (6) extend to the outside of the stator (2). The adjacent ends are fixedly connected by a connecting plate (7). The two movable pole shoes (6) and the two connecting plates (7) form a frame structure and are fitted on the outside of the fixed pole shoe (5). An adjusting rod (8) is fixedly connected to one of the connecting plates (7). The adjusting rod (8) is arranged radially and its outer end passes through the housing (1) and extends to the outside of the housing (1). The adjusting rod (8) is threadedly connected to the housing (1). The adjusting rod (8) is used to push the movable pole shoe (6) to slide along the inclined surface of the fixed pole shoe (5) to change the air gap between the arc surface of the movable pole shoe (6) and the outer circle of the rotor (4). Eccentric vibration components are provided at both ends of the rotating shaft (3).

2. The highly adaptable wide-voltage vibration motor according to claim 1, characterized in that, Another connecting plate (7) is fixedly connected to a guide post (9), which slides through the housing (1).

3. The highly adaptable wide-voltage vibration motor according to claim 1, characterized in that, A cylindrical body (10) is fixedly connected to the outer wall of the housing (1). The cylindrical body (10) is located outside the adjusting rod (8). A screwing part (11) is fixedly connected to one end of the adjusting rod (8) located outside the housing (1). A scale mark (12) is provided on the cylindrical body (10) along the axial direction of the adjusting rod (8).

4. The highly adaptable wide-voltage vibration motor according to claim 3, characterized in that, A sealing plug (13) is provided at the top of the cylinder (10).

5. The highly adaptable wide-voltage vibration motor according to claim 3, characterized in that, The cylinder (10) is provided with a locking nut (14), which is threadedly connected to the adjusting rod (8).

6. The highly adaptable wide-voltage vibration motor according to claim 1, characterized in that, The fixed pole shoe (5) and the stator (2) are integrally formed.

7. The highly adaptable wide-voltage vibration motor according to claim 1, characterized in that, The radius of the arc surface of the movable pole shoe (6) is smaller than the radius of the arc surface of the fixed pole shoe (5).

8. The highly adaptable wide-voltage vibration motor according to claim 1, characterized in that, The eccentric vibration assembly includes a main eccentric mass block (15) fixed to one side of the rotating shaft (3). The main eccentric mass block (15) has a fan-shaped structure. A radial plate (16) is fixedly connected to the rotating shaft (3). The radial plate (16) and the main eccentric mass block (15) are respectively arranged on both sides of the rotating shaft (3). A radial groove (17) is opened on the surface of the radial plate (16) away from the rotor (4). A slider is slidably connected in the radial groove (17). (18) A secondary eccentric mass block (19) is fixed on the slider (18). A first permanent magnet (20) is embedded in one end of the radial groove (17) near the rotating shaft (3). A second permanent magnet (21) is correspondingly embedded in one end of the slider (18) near the first permanent magnet (20). The first permanent magnet (20) and the second permanent magnet (21) are opposite poles facing each other. The weight of the main eccentric mass block (15) is greater than the weight of the secondary eccentric mass block (19).

9. The highly adaptable wide-voltage vibration motor according to claim 8, characterized in that, Both ends of the radial groove (17) are provided with limiting platforms (22), and the limiting platforms (22) are located between the slider (18) and both ends of the radial groove (17).

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