Motor with internal damping structure
By setting up an elastic shock absorbing structure between the motor rotor and the end cap, the vibration absorption ring on the waveform buffer surface absorbs vibration, solving the problem of shaft vibration, achieving smooth operation of the motor and noise reduction, and extending the service life.
Patent Information
- Application Number
- CN202422105688.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-28
- Publication Date
- 2025-07-04
- Estimated Expiration
- 2034-08-28
AI Technical Summary
In the existing motor design, the shaft part is prone to obvious vibration when it is running at high speed or withstands a large load, which affects the smooth operation of the motor and may accelerate bearing wear, increase noise, and even cause mechanical failures.
An elastic shock absorbing structure is provided between the motor rotor and the end cover, including a first shock absorbing ring, and its axial two end surfaces are corrugated buffering surfaces. The bearing is closely attached to the inner side of the end cover, and the corrugated buffering surface is used to increase flexibility and expand the contact area to absorb and buffer vibration.
It significantly weakens the vibration transmission during motor operation, ensures that the motor runs smoothly and quietly, extends the service life of the motor and its related components, reduces noise, and improves stability and reliability.
Smart Images
Figure CN223066922U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field, and particularly relates to an electric motor with a shock absorption structure inside. Background Art
[0002] In the technical field of electric motors, the stability of the front end rotating shaft part of the electric motor has always been one of the key factors affecting the overall performance and operation efficiency of the electric motor. In the existing electric motor designs, although significant progress has been made in power output, efficiency improvement, and durability, there are still many challenges in the stability of the rotating shaft. Especially when the electric motor is running at high speed or under a large load, obvious vibration phenomena often occur in the front end rotating shaft part, which not only affects the running smoothness of the electric motor, but also may accelerate bearing wear, increase noise, and even cause more serious mechanical failures. Content of the Utility Model
[0003] The purpose of the utility model is to provide an electric motor with a shock absorption structure inside, so as to solve one or more technical problems existing in the prior art, and at least provide a beneficial choice or create conditions.
[0004] The technical solution adopted to solve the above technical problems:
[0005] The utility model provides an electric motor with a shock absorption structure inside, which includes a waveform buffer surface of the motor rotor, a motor housing, and an elastic shock absorption structure. The motor rotor is fixedly arranged on the output shaft, and the output shaft is provided with a bearing; the motor housing includes an end cover, and the output shaft passes through a through hole in the middle of the end cover; the elastic shock absorption structure is arranged between the bearing and the end cover, and the elastic shock absorption structure includes a first shock absorption ring, and both end faces of the first shock absorption ring in the axial direction are waveform buffer surfaces.
[0006] The beneficial effect of the utility model is:
[0007] In order to effectively relieve the vibration between the motor rotor and the end cover, an elastic shock absorption structure is added. This structure cleverly uses the bearing to closely adhere to the inner side of the end cover, and a first shock absorption ring is arranged therebetween. The first shock absorption ring is designed with a waveform buffer surface, and the waveform buffer surface not only significantly increases the flexibility of the first shock absorption ring, but also expands its contact surface area, thereby greatly improving the shock absorption efficiency. When the electric motor is running, it is inevitable to generate a certain amount of jitter or vibration. These vibrations are effectively absorbed and buffered by the waveform buffer surface of the first shock absorption ring, and its elastic characteristics can significantly weaken the vibration transmission, ensuring that the electric motor runs more smoothly and quietly.
[0008] As a further improvement of the above technical solution, the waveform buffer surface is a wavy concave-convex surface, and the concave-convex surface includes at least three concave surface structures and at least three convex surface structures. At least three of the concave surface structures are arranged at intervals, and at least three of the convex surface structures are arranged at intervals. By reasonably arranging the concave surface structures and the convex surface structures, the shock absorption effect is further improved.
[0009] As a further improvement of the above technical solution, the distance between the lowest point of the concave surface structure and the highest point of the convex surface structure in the axial direction is 4-8 mm.
[0010] As a further improvement of the above technical solution, the end cover is provided with a limiting groove, and the first shock-absorbing ring is arranged in the limiting groove to position the first shock-absorbing ring, which is convenient for installation and can play a limiting role on the first shock-absorbing ring.
[0011] As a further improvement of the above technical solution, the width range of the first shock-absorbing ring is 2-5 mm, and / or
[0012] the thickness range of the first shock-absorbing ring is 0.5-2 mm, and / or
[0013] the linear distance range between the lowest point of the concave surface structure and the highest point of the convex surface structure is 0.5-2 cm.
[0014] As a further improvement of the above technical solution, the elastic shock-absorbing structure includes a second shock-absorbing ring wrapped outside the first shock-absorbing ring. The second shock-absorbing ring is a wear-resistant component, and the first shock-absorbing ring is an elastic component. An elastic shock-absorbing structure with a multi-layer composite structure is designed to optimize the shock-absorbing performance through the combination of different materials. The inner layer uses a high-elasticity material to absorb vibration, and the outer layer uses a wear-resistant material to improve durability.
[0015] As a further improvement of the above technical solution, the cross-sectional area of the first shock-absorbing ring is larger than the cross-sectional area of the second shock-absorbing ring.
[0016] As a further improvement of the above technical solution, the elastic shock-absorbing structure includes a third shock-absorbing ring arranged on the end cover, and the third shock-absorbing ring is attached to the surface of the first shock-absorbing ring. Reducing the part of the force transmitted to the third shock-absorbing ring, thereby achieving a better shock-absorbing effect.
[0017] As a further improvement of the above technical solution, the outer diameter of the first shock-absorbing ring is equal to the outer diameter of the bearing.
[0018] As a further improvement of the above technical solution, the bearing waveform buffer surface on the output shaft waveform buffer surface is arranged at a position close to the motor rotor waveform buffer surface.
[0019] Since an elastic shock-absorbing structure is provided at the front end rotating shaft part of the motor, it has the advantages of weak vibration and good stability of the motor rotating shaft. Description of the Drawings
[0020] The following further describes the present utility model in conjunction with the drawings and embodiments;
[0021] Figure 1 It is a schematic structural diagram of an embodiment of a motor with a shock-absorbing structure provided by the present utility model;
[0022] Figure 2 It is a front view schematic diagram of an embodiment of a motor with a shock-absorbing structure provided by the present utility model;
[0023] Figure 3 It is a cross-sectional schematic diagram of an embodiment of a motor with a shock-absorbing structure provided by the present utility model;
[0024] Figure 4 It is a cross-sectional schematic diagram of an embodiment of a motor with a shock-absorbing structure provided by the present utility model;
[0025] Figure 5 is Figure 4 an enlarged view of A in Detailed Description of the Embodiment
[0026] This part will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the drawings. The role of the drawings is to supplement the description of the text part of the specification, enabling people to intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but it cannot be understood as a limitation on the protection scope of the present utility model.
[0027] In the description of the present utility model, it should be understood that for the orientation description, such as the orientation or positional relationship indicated by up, down, front, back, left, right, etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model.
[0028] In the description of the present utility model, if there are descriptions with words such as "several", its meaning is one or more, and the meaning of multiple is two or more. Understanding greater than, less than, exceeding, etc. does not include the present number, and understanding above, below, within, etc. includes the present number.
[0029] In the description of the present utility model, unless otherwise clearly defined, terms such as "setting", "installation", "connection", etc. should be understood in a broad sense, and those skilled in the relevant technical field can reasonably determine the specific meanings of the above terms in the present utility model in combination with the specific content of the technical solution.
[0030] The existing vibration of the front end shaft part of the motor is relatively severe, and the stability of the motor shaft is not good. Therefore, referring to Figures 1 to 3 , the following embodiments are made for a motor with a shock absorption structure inside the present utility model:
[0031] A motor with a shock absorption structure inside includes a motor rotor 100, a motor housing, a motor rotor 100, and an elastic shock absorption structure. The motor rotor 100 is fixedly arranged on the output shaft 110, and the output shaft 110 is provided with a bearing 120; the motor housing includes an end cover 200, and the end cover 200 is provided with a through hole 220. The output shaft 110 passes through the through hole 220 in the middle of the end cover 200. The motor housing further includes a housing except the end cover 200, and the housing is used to install and protect other structures of the motor such as the motor stator coil part. Since it is not the main improvement point, no specific description is made here; the end cover 200 is provided with mounting holes, so that the end cover 200 is fixed to the housing by screws or rivets passing through the mounting holes, or the end cover 200 is snap-fitted to other housings, or the end cover 200 is integrally provided with other housings, and the shape of the end cover 200 is also adjusted and changed according to the corresponding housing, which is set by those skilled in the art according to the specific situation.
[0032] An elastic shock absorption structure is provided between the bearing 120 and the end cover 200. The elastic shock absorption structure includes a first shock absorption ring 300. Both end faces of the first shock absorption ring 300 in the axial direction are wave-shaped buffer surfaces 310, and the wave-shaped buffer surfaces 310 are respectively in contact with the end cover 200 and the bearing 120 to weaken the vibration transmission. Further, the concave-convex surface includes at least three concave structures and at least three convex structures. The at least three concave structures are arranged at intervals, and the at least three convex structures are arranged at intervals. By reasonably arranging the layout of the concave structures and the convex structures, the shock absorption effect is further improved.
[0033] The first shock absorption ring 300 can be made of materials with high elasticity, wear resistance and good stability, such as high-quality rubber, silica gel or polyurethane, etc., to ensure that it can work effectively for a long time.
[0034] The outer diameter of the first shock absorption ring 300 is equal to the outer diameter of the bearing 120. That is, the outer diameter of the first shock absorption ring 300 is basically the same as the outer diameter of the front bearing 120, and slightly smaller than the diameter of the inner side surface of the limit groove 210, so that the first shock absorption ring 300 is firmly fixed on the bearing 120, and the outer edge of the first shock absorption ring 300 slightly presses against the inner edge of the limit groove 210 to form a contact interface that is both tight and has a certain elasticity.
[0035] An elastic shock-absorbing structure is provided between the motor rotor 100 and the end cover 200, and it is pressed against the inner side of the end cover 200 through the bearing 120. The jitter generated by the motor rotor 100 during operation, including radial and axial directions, is weakened through the buffering and absorption of the elastic shock-absorbing structure, making the operation of the motor more stable. This design enables the motor to have a better shock-absorbing effect during operation, especially in the output shaft 110 part, thus significantly reducing the vibration amplitude. After adopting this elastic shock-absorbing structure design, the jitter and vibration of the motor during long-term operation will be significantly suppressed, which helps to extend the service life of the motor and its related components, reduce noise pollution, and improve the comfort of the overall working environment. At the same time, this design also enhances the stability and reliability of the motor, providing a strong guarantee for the efficient operation of the motor under various working conditions.
[0036] For further improvement, the distance between the lowest point of the concave structure and the highest point of the convex structure in the axial direction is 4 - 8 millimeters. It can not only effectively absorb and disperse the axial vibration energy generated during the operation of the motor, but also prevent structural looseness caused by excessive clearance or increased friction caused by too small clearance, thus improving the long-term operation stability of the motor while ensuring the shock-absorbing performance.
[0037] The thickness range of the first shock-absorbing ring 300 is 0.5 - 2 mm. This thickness selection is based on the comprehensive consideration of material elasticity, durability, and shock-absorbing efficiency. An overly thin first shock-absorbing ring 300 may not provide sufficient shock-absorbing effect, while an overly thick first shock-absorbing ring 300 may increase unnecessary weight and cost, and at the same time affect the compactness of the structure.
[0038] The straight-line distance range between the lowest point of the concave structure and the highest point of the convex structure is 0.5 - 2 cm, ensuring that the first shock-absorbing ring 300 can fully deform to absorb energy when subjected to vibration, while avoiding excessive deformation resulting in structural failure or performance degradation. This design not only improves the shock-absorbing performance, but also enhances the overall rigidity and stability of the structure, enabling the motor to maintain an excellent operation performance under various working conditions.
[0039] For further improvement, the end cover 200 is provided with a limiting groove 210, and the first shock-absorbing ring 300 is arranged in the limiting groove 210 to position the first shock-absorbing ring 300, which is convenient for installation and can play a limiting role for the first shock-absorbing ring 300. The limiting groove 210 not only simplifies the installation process, but also ensures that the first shock-absorbing ring 300 can be firmly held in the predetermined position after installation, effectively preventing its displacement during use, thereby further improving the reliability and durability of the overall structure.
[0040] For further improvement, refer to Figure 4 and Figure 5, an annular clamping groove 211 is provided on the inner side wall of the limiting groove 210, and an annular clamping ring 310 that is clamped with the annular clamping groove 211 is provided on the outer peripheral wall of the first shock-absorbing ring 300. This further fixes the first shock-absorbing ring 300 axially and plays a better role in buffering and absorbing.
[0041] Since there will be a certain degree of wear in the elastic shock-absorbing structure during the shock-absorbing process, further improvement is made. The elastic shock-absorbing structure further includes a second shock-absorbing ring 400 wrapped outside the first shock-absorbing ring 300. The second shock-absorbing ring 400 is a wear-resistant component, and the first shock-absorbing ring 300 is an elastic component. An elastic shock-absorbing structure with a multi-layer composite structure is designed to optimize the shock-absorbing performance through the combination of different materials. The inner layer uses a high-elasticity material to absorb vibration, and the outer layer uses a wear-resistant material to improve durability.
[0042] Further improvement is made. The cross-sectional area of the first shock-absorbing ring 300 is larger than that of the second shock-absorbing ring 400. Because the wear is mainly on the outer surface of the elastic structure, and the first shock-absorbing ring 300 mainly plays a buffering role. In order to achieve a better buffering effect, it is more reasonable to use more buffering materials. Therefore, it is designed that the usage amount of the wear-resistant material is much less than that of the high-elasticity material to improve the shock-absorbing effect while achieving wear resistance.
[0043] In some other embodiments, a further enhanced design is made for the elastic shock-absorbing structure. Specifically, a third shock-absorbing ring is added to the end cover 200, which fits on the surface of the existing first shock-absorbing ring 300 to form a superimposed shock-absorbing system.
[0044] This superimposed design not only optimizes the force transmission path but also effectively disperses and absorbs the vibration energy from the motor shaft part. When the motor is running, some of the forces that might have been directly transmitted to the motor structure will now first pass through the preliminary shock absorption of the first shock-absorbing ring 300 and then be further absorbed and dispersed by the third shock-absorbing ring. This process significantly reduces the force transmission efficiency, thus achieving a better shock-absorbing effect.
[0045] Therefore, by introducing the third shock-absorbing ring and closely cooperating with the first shock-absorbing ring 300, the motor has further improvement in reducing vibration and enhancing the stability of the shaft, providing a more stable and reliable guarantee for the operation of the motor.
[0046] The above has specifically described the preferred embodiments of the present utility model, but the present invention is not limited to the embodiments. Those skilled in the art can also make various equivalent variations or substitutions without departing from the spirit of the present utility model, and these equivalent variations or substitutions are all included within the scope defined by the claims of this application.
Claims
1. A motor with a shock-absorbing structure, characterized in that, Comprising: A motor rotor (100), the motor rotor (100) is fixedly arranged on an output shaft (110), and the output shaft (110) is provided with a bearing (120); Motor housing, the motor housing includes an end cover (200), and the output shaft (110) passes through a through hole (220) in the middle of the end cover (200) ； An elastic shock-absorbing structure, the elastic shock-absorbing structure is arranged between the bearing (120) and an end cover (200), the elastic shock-absorbing structure includes a first shock-absorbing ring (300), and both end faces of the first shock-absorbing ring (300) in the axial direction are wave-shaped buffer surfaces (310).
2. The motor with a shock-absorbing structure inside according to claim 1, characterized in that: The wave-shaped buffer surface (310) is a wavy concave-convex surface, the concave-convex surface includes at least three concave structures and at least three convex structures, at least three of the concave structures are arranged at intervals, and at least three of the convex structures are arranged at intervals.
3. The motor with a shock-absorbing structure inside according to claim 2, characterized in that: The distance between the lowest point of the concave structure and the highest point of the convex structure in the axial direction is 4-8 millimeters.
4. The motor with a shock-absorbing structure inside according to claim 1, characterized in that: The end cover (200) is provided with a limiting groove (210), and the first shock-absorbing ring (300) is arranged in the limiting groove (210).
5. The motor with a shock-absorbing structure inside according to claim 2, characterized in that: The width range of the first shock-absorbing ring is 2-5mm; and / or The thickness range of the first shock-absorbing ring is 0.5-2mm; and / or The linear distance range between the lowest point of the concave structure and the highest point of the convex structure is 0.5-2cm.
6. The motor with a shock-absorbing structure inside according to claim 1, characterized in that: The elastic shock-absorbing structure includes a second shock-absorbing ring (400) wrapped outside the first shock-absorbing ring (300), the second shock-absorbing ring (400) is a wear-resistant member, and the first shock-absorbing ring (300) is an elastic member.
7. The motor with a shock-absorbing structure inside according to claim 6, characterized in that: The cross-sectional area of the first shock-absorbing ring (300) is larger than the cross-sectional area of the second shock-absorbing ring (400).
8. The motor with a shock-absorbing structure inside according to claim 1, characterized in that: The elastic shock-absorbing structure includes a third shock-absorbing ring arranged on the end cover (200), and the third shock-absorbing ring is in contact with the surface of the first shock-absorbing ring (300).
9. The motor with a shock-absorbing structure inside according to claim 1, characterized in that: The outer diameter of the first shock-absorbing ring (300) is equal to the outer diameter of the bearing (120).
10. The motor with a shock-absorbing structure inside according to claim 1, characterized in that: The bearing (120) on the output shaft (110) is arranged at a position close to the motor rotor (100).