Damping motor

Abstract

The utility model discloses a shock attenuation motor, including shell, stator subassembly, rotor magnetic ring, pivot, bearing seat, front bearing, rear bearing and PCB board, front bearing with rear bearing is installed respectively in the axial both ends of bearing seat, and the inner ring of front bearing with rear bearing is set up in the outer periphery of pivot, and stator subassembly and PCB board set up respectively in the front section outer periphery and the middle section outer periphery of bearing seat, and the axial one end of shell is provided with the opening, and the axial other end of shell is provided with end plate, and rotor magnetic ring is fixed in the inner wall of shell and with stator subassembly corresponds, and one end of pivot is fixedly connected in the center of end plate, and PCB board is located at the opening of shell, and be provided with elastic shock attenuation element between front bearing and the bottom wall of first installation cavity. The utility model can reduce the noise produced when motor operation significantly, improve the reliability of precision component on PCB board, prolong the service life of motor.

Description

Technical Field

[0001] This utility model relates to the field of motor technology, specifically to a shock-absorbing motor. Background Technology

[0002] Electric motors, as power devices that convert electrical energy into mechanical energy, are widely used in various fields such as industrial production, household appliances, transportation, and precision instruments. However, during operation, the centrifugal force, electromagnetic force, and mechanical friction generated by the high-speed rotation of the rotor inevitably cause vibration and noise. This vibration not only reduces the user experience and generates noise pollution, but also poses a serious threat to the motor's lifespan and reliability. For example, it can cause loosening or breakage of solder joints in internal precision electronic components, accelerated bearing wear, and even resonance, affecting the motor's lifespan and reducing the stability of the entire equipment.

[0003] Existing equipment typically adds vibration-damping structures to the outside of the motor to alleviate vibration problems. Specifically, this involves placing elastic elements such as rubber pads and damping springs on the mounting feet of the motor housing to absorb and isolate vibrations through the damping effect. However, this method has limited vibration-damping effectiveness, only attenuating high-frequency, small-amplitude vibrations, and is not very effective at isolating strong vibrations or low-frequency vibrations generated by the motor itself. Utility Model Content

[0004] In order to overcome the shortcomings of the prior art, this utility model provides a shock-absorbing motor that can significantly reduce the noise generated during motor operation, improve the reliability of precision components on the PCB board, and extend the service life of the motor.

[0005] The technical solution adopted by this utility model to solve its technical problem is:

[0006] A vibration-damping motor includes a housing, a stator assembly, a rotor magnetic ring, a shaft, a bearing housing, a front bearing, a rear bearing, and a PCB board. The bearing housing has a first mounting cavity and a second mounting cavity at its two axial ends. The front bearing and the rear bearing are respectively installed in the first mounting cavity and the second mounting cavity. The inner rings of the front bearing and the rear bearing are fitted around the outer periphery of the shaft. The bearing housing has a front section, a middle section, and a rear section. The stator assembly is disposed on the outer periphery of the front section of the bearing housing. The PCB board is disposed on the outer periphery of the middle section of the bearing housing. The housing has an opening at one axial end and an end plate at the other axial end. The rotor magnetic ring is fixed to the inner wall of the housing and corresponds to the stator assembly. One end of the shaft is fixedly connected to the center of the end plate. The PCB board is located at the opening of the housing. An elastic damping element is disposed between the front bearing and the bottom wall of the first mounting cavity.

[0007] As a further improvement to the above technical solution, the elastic damping element is a wave-shaped elastic washer.

[0008] As a further improvement to the above technical solution, the outer diameter of the middle section of the bearing housing is larger than that of the front section and smaller than that of the rear section. The outer periphery of the rear section of the bearing housing is provided with a plurality of mounting ears, and the mounting ears are provided with mounting holes.

[0009] As a further improvement to the above technical solution, the stator assembly includes a stator core and a stator winding wound on the stator core. The stator core is provided with a first through hole, and the inner wall of the first through hole is provided with a plurality of first positioning grooves. The outer periphery of the front section of the bearing seat is provided with a plurality of first positioning protrusions. Both the first positioning groove and the first positioning protrusion are elongated. The length direction of the first positioning groove extends along the axial direction of the first through hole. The outer surface of the first positioning protrusion is flush with the outer surface of the middle section of the bearing seat. The first through hole mates with the outer periphery of the front section of the bearing seat, and the plurality of first positioning protrusions mate with the plurality of first positioning grooves one by one.

[0010] As a further improvement to the above technical solution, a number of limiting blocks are also provided on the outer periphery of the front section of the bearing housing. The limiting blocks are located on the shoulder between the front section and the middle section of the bearing housing, and the limiting blocks are used to limit the end of the stator core.

[0011] As a further improvement to the above technical solution, the PCB board is provided with a second through hole, the inner wall of the second through hole is provided with a second positioning groove, the outer periphery of the middle section of the bearing seat is provided with a second positioning protrusion, the second through hole cooperates with the outer periphery of the middle section of the bearing seat, the second positioning groove cooperates with the second positioning protrusion, and the shoulder between the front section and the middle section of the bearing seat is provided with a plurality of riveting parts, the riveting parts use folding to snap the PCB board onto the outer periphery of the middle section of the bearing seat.

[0012] As a further improvement to the above technical solution, the outer shell is provided with a plurality of radial ventilation holes along its radial direction, and the plurality of radial ventilation holes are distributed in a circular array along the center of the outer shell.

[0013] As a further improvement to the above technical solution, a first guide plate is provided on one side of the radial ventilation hole, and the first guide plate is bent inward to form an arc-shaped structure.

[0014] As a further improvement to the above technical solution, the end plate is provided with a plurality of axial ventilation holes, which are arranged in a circular array along the center of the end plate.

[0015] As a further improvement to the above technical solution, a second guide plate is provided on one side of the axial ventilation hole, and the second guide plate is folded inward to form an inclined structure.

[0016] The beneficial effects of this utility model are as follows: This utility model provides a vibration-damping motor. By setting an elastic damping element between the front bearing and the bottom wall of the first mounting cavity, when the motor is working, the PCB board is energized, controlling the stator assembly to generate a rotating magnetic field. The rotating magnetic field drives the rotor magnetic ring to rotate at high speed, and the rotor magnetic ring drives the outer shell and the shaft to rotate together. During the high-speed rotation of the rotor magnetic ring, outer shell, and shaft, vibration is generated due to electromagnetic force and mechanical rotational imbalance. The vibration of the shaft attempts to be transmitted to the bearing seat through the front and rear bearings. At this time, the elastic damping element set between the front bearing and the bottom wall of the first mounting cavity can absorb and attenuate the vibration energy transmitted from the shaft. Therefore, it can significantly reduce the noise generated during motor operation, improve the reliability of precision components on the PCB board, and extend the service life of the motor. Attached Figure Description

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0018] Figure 1 This is a schematic diagram of the structure of a shock-absorbing motor provided in Embodiment 1 of this utility model;

[0019] Figure 2 This is an exploded view of a shock-absorbing motor provided in Embodiment 1 of this utility model;

[0020] Figure 3 This is an exploded view from another perspective of a shock-absorbing motor provided in Embodiment 1 of this utility model;

[0021] Figure 4 yes Figure 3 Schematic diagram of the middle stator core, PCB board and bearing housing;

[0022] Figure 5 This is a schematic diagram of the structure of a shock-absorbing motor provided in Embodiment 2 of this utility model;

[0023] Figure 6 yes Figure 5 A schematic diagram of the inner shell structure.

[0024] Reference numerals: 1-Outer shell, 11-End plate, 13-Radial ventilation hole, 14-First guide plate, 15-Axial ventilation hole, 16-Second guide plate, 2-Stator core, 21-First through hole, 22-First positioning groove, 3-Rotor magnetic ring, 4-Shaft, 5-Bearing seat, 51-First mounting cavity, 52-Second mounting cavity, 53-First positioning protrusion, 54-Limiting block, 55-Second positioning protrusion, 56-Riveting part, 57-Mounting ear, 571-Mounting hole, 6-Front bearing, 7-Rear bearing, 8-PCB board, 81-Second through hole, 82-Second positioning groove, 9-Wave elastic washer. Detailed Implementation

[0025] The following will clearly and completely describe the concept, specific structure, and technical effects of this utility model in conjunction with embodiments and accompanying drawings, so as to fully understand the purpose, features, and effects of this utility model. Obviously, the described embodiments are only a part of the embodiments of this utility model, not all of them. Other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are all within the scope of protection of this utility model. Furthermore, all connections / linkages involved in the patent do not simply refer to direct contact between components, but rather to the ability to form a better connection structure by adding or reducing connecting accessories according to specific implementation conditions. The various technical features in this utility model can be combined interactively without contradicting each other.

[0026] Example 1

[0027] Reference Figures 1 to 4 The present invention provides a shock-absorbing motor in embodiment 1, comprising a housing 1, a stator assembly, a rotor magnetic ring 3, a rotating shaft 4, a bearing housing 5, a front bearing 6, a rear bearing 7, and a PCB board 8. The bearing housing 5 has a first mounting cavity 51 and a second mounting cavity 52 at its two axial ends. The front bearing 6 and the rear bearing 7 are respectively installed in the first mounting cavity 51 and the second mounting cavity 52. ​​The inner rings of the front bearing 6 and the rear bearing 7 are fitted around the outer periphery of the rotating shaft 4. The bearing housing 5 has a front section, a middle section, and a rear section. The stator assembly is disposed on the outer periphery of the front section of the bearing housing 5. The PCB board 8 is disposed on the outer periphery of the middle section of the bearing housing 5. The housing 1 has an opening at one axial end and an end plate 11 at the other axial end. The rotor magnetic ring 3 is fixed to the inner wall of the housing 1 and corresponds to the stator assembly. One end of the rotating shaft 4 is fixedly connected to the center of the end plate 11. The PCB board 8 is located at the opening of the housing 1. An elastic shock-absorbing element is disposed between the front bearing 6 and the bottom wall of the first mounting cavity 51.

[0028] Understandably, the bearing housing 5 is fixed to an external device. When the motor is running, the PCB board 8 is powered on, controlling the stator assembly to generate a rotating magnetic field. This rotating magnetic field drives the rotor magnetic ring 3 to rotate at high speed, which in turn drives the housing 1 and the shaft 4 to rotate together. During the high-speed rotation of the rotor magnetic ring 3, housing 1, and shaft 4, vibrations occur due to electromagnetic force and mechanical rotational imbalance. The vibration of the shaft 4 attempts to be transmitted to the bearing housing 5 through the front bearing 6 and rear bearing 7. At this time, the elastic damping element set between the front bearing 6 and the bottom wall of the first mounting cavity 51 can absorb and attenuate the vibration energy transmitted from the shaft 4. This significantly reduces the noise generated during motor operation, improves the reliability of the precision components on the PCB board 8, and extends the service life of the motor.

[0029] In some preferred embodiments, the elastic damping element is a wave-shaped elastic washer 9.

[0030] Understandably, the wave-shaped elastic washer 9 is compressed and installed between the front bearing 6 and the bottom wall of the first mounting cavity 51, providing a constant axial preload to the front bearing 6. This eliminates the axial clearance of the front bearing 6, suppresses the axial movement of the front bearing 6, and improves the stability of the motor during operation.

[0031] In some preferred embodiments, the outer diameter of the middle section of the bearing housing 5 is larger than that of the front section and smaller than that of the rear section. The outer periphery of the rear section of the bearing housing 5 is provided with a plurality of mounting ears 57, and the mounting ears 57 are provided with mounting holes 571.

[0032] Understandably, on the one hand, by forming a stepped shaft structure with different diameters of the front, middle and rear sections of the bearing housing 5, the PCB board 8 and the stator assembly can be sequentially fitted onto the bearing housing 5. At the same time, the shoulders formed between the front and middle sections and between the middle and rear sections of the bearing housing 5 can serve as axial positioning references for the stator assembly and the PCB board 8, simplifying the assembly process and ensuring assembly accuracy. On the other hand, several mounting ears 57 can serve as mounting references, and the mounting ears 57 can be fixed to the equipment with fasteners, thereby enabling the entire motor to be fixed to the equipment.

[0033] In some preferred embodiments, the stator assembly includes a stator core 2 and a stator winding wound on the stator core 2. The stator core 2 is provided with a first through hole 21. The inner wall of the first through hole 21 is provided with a plurality of first positioning grooves 22. The outer periphery of the front section of the bearing seat 5 is provided with a plurality of first positioning protrusions 53. The first positioning grooves 22 and the first positioning protrusions 53 are both elongated. The length direction of the first positioning grooves 22 extends along the axial direction of the first through hole 21. The outer surface of the first positioning protrusions 53 is flush with the outer surface of the middle section of the bearing seat 5. The first through hole 21 is engaged with the outer periphery of the front section of the bearing seat 5. The plurality of first positioning protrusions 53 are engaged with the plurality of first positioning grooves 22 one by one.

[0034] Furthermore, a number of limiting blocks 54 are provided on the outer periphery of the front section of the bearing housing 5. The limiting blocks 54 are located on the shoulder between the front section and the middle section of the bearing housing 5. The limiting blocks 54 are used to limit the end of the stator core 2.

[0035] Understandably, during assembly, the operator only needs to align the first positioning groove 22 of the stator core 2 with the first positioning protrusion 53 at the front of the bearing housing 5, and then push it in axially so that the first positioning groove 22 and the first positioning protrusion 53 slide relative to each other until one end of the stator core 2 abuts against the limiting block 54, thus completing radial and axial positioning and preventing relative rotation between the stator core 2 and the bearing housing 5.

[0036] In some preferred embodiments, the PCB board 8 is provided with a second through hole 81, the inner wall of the second through hole 81 is provided with a second positioning groove 82, the outer periphery of the middle section of the bearing seat 5 is provided with a second positioning protrusion 55, the second through hole 81 is engaged with the outer periphery of the middle section of the bearing seat 5, the second positioning groove 82 is engaged with the second positioning protrusion 55, and a plurality of riveting parts 56 are provided on the shoulder between the front section and the middle section of the bearing seat 5. The riveting parts 56 are used to snap the PCB board 8 onto the outer periphery of the middle section of the bearing seat 5 by folding.

[0037] Understandably, during assembly, the second through hole 81 on the PCB board 8 is aligned with the outer periphery of the middle section of the bearing seat 5, and the second positioning groove 82 on the PCB board 8 is aligned with the second positioning protrusion 55 on the outer periphery of the middle section of the bearing seat 5. The PCB board 8 is then pushed in axially until the end of the PCB board 8 is in contact with the shoulder between the middle section and the rear end of the bearing seat 5. Then, using a special riveting fixture, the pre-processed riveting part 56 is folded outward, pressing the riveting part 56 against the end face of the PCB board 8 to fix the PCB board 8. On the one hand, the cooperation of the second positioning protrusion 55 and the second positioning groove 82 can prevent relative rotation between the PCB board 8 and the bearing seat 5; on the other hand, the pressing of the PCB board 8 by several riveting parts 56 can prevent the PCB board 8 from axially shifting or loosening, improving the firmness of the PCB board 8 installation.

[0038] In some preferred embodiments, the outer casing 1 is provided with a plurality of radial ventilation holes 13 along its radial direction, and the plurality of radial ventilation holes 13 are distributed in a circular array along the center of the outer casing 1.

[0039] It is understandable that a large amount of heat is generated during the operation of the motor. Cooler external air enters the interior of the housing 1 through the radial ventilation hole 13. The cool air absorbs the heat inside the motor to form hot air. The hot air flows out from the gap between the opening of the housing 1 and the PCB board 8, forming a cooling airflow circulation. This can reduce the temperature of the motor during operation, prevent the aging of internal parts and the degradation of magnet performance, and greatly improve the service life and reliability of the motor.

[0040] Furthermore, a first guide plate 14 is provided on one side of the radial ventilation hole 13, and the first guide plate 14 is bent inward to form an arc-shaped structure.

[0041] It is understandable that when the outer casing 1 drives the radial ventilation hole 13 and the first guide plate 14 to rotate at high speed, the cold air outside enters the motor through the arc-shaped guide of the first guide plate 14. At the same time, the first guide plate 14 can accelerate the flow of air inside the motor by stirring the air inside the motor, thereby further reducing the temperature of the motor during operation.

[0042] Example 2

[0043] Reference Figure 5 and Figure 6 The difference between Embodiment 2 and Embodiment 1 lies in the ventilation structure. Specifically, in Embodiment 2, the end plate 11 is provided with a plurality of axial ventilation holes 15, which are arranged in a circular array along the center of the end plate 11.

[0044] Understandably, the motor generates significant heat during operation. Cooler external air enters the housing 1 through several axial ventilation holes 15. This cool air absorbs the heat from the motor's interior, forming hot air. This hot air then flows out through the gap between the opening in the housing 1 and the PCB board 8, creating a cooling airflow circulation. This process reduces the motor's operating temperature, prevents aging of internal components and degradation of magnet performance, and significantly improves the motor's lifespan and reliability.

[0045] Furthermore, a second guide plate 16 is provided on one side of the axial ventilation hole 15, and the second guide plate 16 is folded inward to form an inclined structure.

[0046] It is understandable that when the outer casing 1 drives the axial ventilation hole 15 and the second guide plate 16 to rotate at high speed, the cold air outside enters the motor through the inclined guide plate 16. At the same time, the second guide plate 16 can accelerate the air flow inside the motor by stirring the air inside the motor, thereby further reducing the temperature of the motor during operation.

[0047] The above is a detailed description of the preferred embodiments of the present utility model. However, the present utility model is not limited to the described embodiments. Those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the present utility model. All such equivalent modifications or substitutions are included within the scope defined by the claims of this application.

Claims

1. A vibration damping motor, characterized in that, The device includes a housing, a stator assembly, a rotor magnetic ring, a shaft, a bearing housing, a front bearing, a rear bearing, and a PCB board. The bearing housing has a first mounting cavity and a second mounting cavity at its two axial ends. The front bearing and the rear bearing are respectively installed in the first mounting cavity and the second mounting cavity. The inner rings of the front bearing and the rear bearing are fitted around the outer circumference of the shaft. The bearing housing has a front section, a middle section, and a rear section. The stator assembly is located on the outer circumference of the front section of the bearing housing. The PCB board is located on the outer circumference of the middle section of the bearing housing. The housing has an opening at one axial end and an end plate at the other axial end. The rotor magnetic ring is fixed to the inner wall of the housing and corresponds to the stator assembly. One end of the shaft is fixedly connected to the center of the end plate. The PCB board is located at the opening of the housing. A wave-shaped elastic washer is provided between the front bearing and the bottom wall of the first mounting cavity. The wave-shaped elastic washer is compressed and installed between the front bearing and the bottom wall of the first mounting cavity to provide a constant axial preload to the front bearing.

2. The vibration damping motor according to claim 1, characterized in that, The outer diameter of the middle section of the bearing housing is larger than that of the front section but smaller than that of the rear section. The outer periphery of the rear section of the bearing housing is provided with several mounting ears, and the mounting ears are provided with mounting holes.

3. A vibration damping motor according to claim 2, characterized in that, The stator assembly includes a stator core and a stator winding wound on the stator core. The stator core is provided with a first through hole, and the inner wall of the first through hole is provided with a plurality of first positioning grooves. The outer periphery of the front section of the bearing housing is provided with a plurality of first positioning protrusions. Both the first positioning grooves and the first positioning protrusions are elongated. The length direction of the first positioning groove extends along the axial direction of the first through hole. The outer surface of the first positioning protrusion is flush with the outer surface of the middle section of the bearing housing. The first through hole mates with the outer periphery of the front section of the bearing housing, and the plurality of first positioning protrusions mate with the plurality of first positioning grooves one by one.

4. A vibration damping motor according to claim 3, characterized in that, The outer periphery of the front section of the bearing housing is also provided with several limiting blocks. The limiting blocks are located on the shoulder between the front section and the middle section of the bearing housing. The limiting blocks are used to limit the end of the stator core.

5. A vibration damping motor according to claim 2, characterized in that, The PCB board is provided with a second through hole, and the inner wall of the second through hole is provided with a second positioning groove. The outer periphery of the middle section of the bearing seat is provided with a second positioning protrusion. The second through hole mates with the outer periphery of the middle section of the bearing seat, and the second positioning groove mates with the second positioning protrusion. The shoulder between the front section and the middle section of the bearing seat is provided with a plurality of riveting parts. The riveting parts use folding to snap the PCB board onto the outer periphery of the middle section of the bearing seat.

6. A vibration damping motor according to claim 1, characterized in that, The outer casing has a plurality of radial ventilation holes arranged along its radial direction, and the plurality of radial ventilation holes are distributed in a circular array along the center of the outer casing.

7. A vibration damping motor according to claim 6, characterized in that, A first guide plate is provided on one side of the radial ventilation hole, and the first guide plate is bent inward to form an arc-shaped structure.

8. A vibration damping motor according to claim 1, characterized in that, The end plate is provided with a plurality of axial ventilation holes, which are arranged in a circular array along the center of the end plate.

9. A vibration damping motor according to claim 8, characterized in that, A second guide plate is provided on one side of the axial ventilation hole, and the second guide plate is folded inward to form an inclined structure.

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