Automobile part stator shaft fixing device

Abstract

The invention discloses an automobile part stator shaft fixing device, which comprises a motor main shell, a stator shaft and a fixing assembly, and is characterized in that a boss abutted against the stator shaft is arranged in a hollow area of the motor main shell; the fixing assembly comprises a first fixing block and a second fixing block which are distributed at the two opposite ends of the stator shaft in an abutting mode, the motor main shell is in threaded connection with a first fixing screw and a second fixing screw, and the first fixing block, the second fixing block and the boss are all used for fixing the stator shaft in the radial direction; one end of the stator shaft is provided with a first fixing disc, the other end of the stator shaft is provided with a second fixing disc, the second fixing disc and the second fixing block are of an integrally formed structure, and the first fixing disc and the second fixing disc are both used for fixing the two axial ends of the stator shaft. The stator shaft is subjected to multi-dimensional high-strength fixation through the fixing assembly, so that the stator shaft is effectively prevented from deviating or shaking in the working process, the reliability and stability of motor operation are improved, and the technical problem that the stator shaft is lack of axial fixation in the prior art is solved.

Description

Technical Field

[0001] The invention relates to the technical field of stator shaft fixing, and in particular to a stator shaft fixing device for automobile parts. Background Art

[0002] As an important part of the motor, the stator of the automobile motor is responsible for effectively converting electrical energy into mechanical energy, driving various electronic devices and functional modules of the automobile. The structure of the stator is usually based on copper or nickel alloys. Such materials are widely used in motor design due to their superior electrical and thermal conductivity. The multiple coils configured inside the stator are connected to other electrical systems of the car through the circuit system. When the coils are energized, a rotating magnetic field is generated in the stator. This magnetic field interacts with the rotor to enable the motor to complete the movement.

[0003] In the prior art, the motor housing is cylindrical, the stator shaft is pressed into the hollow area of ​​the motor housing, and the housing and the stator shaft are mostly fitted by interference fit. However, the traditional stator shaft fixing device can only provide radial fixation for the stator shaft. During the long-term high-speed operation of the motor, the stator shaft will produce obvious axial displacement due to the influence of factors such as centrifugal force and temperature changes, which will cause the gap between the stator and the rotor to change, increase friction and wear, and even cause the motor to fail in severe cases, affecting the normal operation of the motor. Summary of the invention

[0004] The purpose of the present invention is to provide a stator shaft fixing device for an automobile component, which solves the technical problem of lack of axial fixing of the stator shaft in the prior art.

[0005] To achieve this object, the present invention adopts the following technical solutions: A stator shaft fixing device for automobile parts, comprising a motor main housing, a stator shaft and a fixing assembly, wherein a boss abutting against the stator shaft is provided in a hollow area of ​​the motor main housing, and a gap is provided between an outer wall of the stator shaft away from the boss and an inner wall of the motor main housing; The fixing assembly includes a first fixing block and a second fixing block abutting against opposite ends of the stator shaft, a first fixing screw and a second fixing screw are threadedly connected on the motor main housing, the first fixing screw abuts against the first fixing block, and the second fixing screw abuts against the second fixing block, and the first fixing block, the second fixing block and the boss are all used to radially fix the stator shaft; A first fixing plate is disposed at one end of the stator shaft, and a second fixing plate integrally formed with the second fixing block is disposed at the other end of the stator shaft. The first fixing plate and the second fixing plate are both used to fix the two axial ends of the stator shaft.

[0006] Optionally, the number of the first fixing screws and the number of the second fixing screws are both set to two, the two first fixing screws are vertically arranged, and the two second fixing screws are vertically arranged.

[0007] Optionally, a connecting rod is connected between the first fixing block and the second fixing block, the first fixing block is provided with a first thread groove, and one end of the connecting rod is provided with a first external thread that cooperates with the thread of the first thread groove; the second fixing block is provided with a second thread groove, and one end of the connecting rod is provided with a second external thread that cooperates with the thread of the second thread groove.

[0008] Optionally, the first fixing block is provided with a first fixing surface which is closely fitted with the outer wall of the stator shaft, and the second fixing block is provided with a second fixing surface which is closely fitted with the outer wall of the stator shaft; The first fixing surface and the second fixing surface are both arc surfaces, and the first external thread and the second external thread are spaced apart and rotate in opposite directions.

[0009] Optionally, the stator shaft is provided with a first silencer hole and a second silencer hole along its radial direction, one end of the first silencer hole and the second silencer hole are both connected to the outer wall of the stator shaft, and the other end of the first silencer hole and the second silencer hole are both connected to the inner wall of the stator shaft; A first muffler channel communicating with the first muffler hole is disposed in the first fixing block, and a second muffler channel communicating with the second muffler hole is disposed in the second fixing block.

[0010] Optionally, the first fixing screw is provided with a third silencer hole connected to the first silencer channel, the second fixing screw is provided with a fourth silencer hole connected to the second silencer channel, and the third silencer hole and the fourth silencer hole are both blind holes.

[0011] Optionally, the first thread groove is connected to the first silencer channel, the second thread groove is connected to the second silencer channel, and a third silencer channel is opened in the connecting rod, and the third silencer channel is used to connect the first silencer channel and the second silencer channel.

[0012] Optionally, the stator shaft is provided with a fifth silencer hole along its axial direction, which is respectively connected with the first silencer hole and the second silencer hole, one end of the fifth silencer hole is connected with the end of the stator shaft close to the first silencer hole, and the other end of the fifth silencer hole is closed.

[0013] Optionally, the first fixing plate includes a first fixing portion, a second fixing portion and a third fixing portion which are integrally formed structures, the first fixing portion is cylindrical, and the second fixing portion is annular; The motor main housing is sleeved with the second fixing portion, the first fixing portion and the second fixing portion are both in contact with the end surface of the stator shaft, and the third fixing portion is provided with a fixing hole for fixing with the motor main housing.

[0014] Optionally, the stator shaft is a cylindrical structure with a hollow interior, and a plurality of winding grooves for installing motor windings are distributed inside the stator shaft, and the winding grooves are respectively connected to the inner wall of the stator shaft and the opposite ends along the axial direction thereof.

[0015] Compared with the prior art, the present invention has the following beneficial effects: The present invention provides a stator shaft fixing device for automotive parts, which performs preliminary positioning on the stator shaft through a boss, and cooperates with the fixing of a first fixing block and a second fixing block to jointly fix the stator shaft radially; the fixing action of the first fixing plate and the second fixing plate prevents the stator shaft from axial movement, thereby achieving multi-dimensional high-strength fixation of the stator shaft, effectively preventing its displacement or shaking during operation, and improving the reliability and stability of the motor operation. Since a gap is provided between the stator shaft and the inner wall of the motor main housing, a deformation buffer space is formed, which can alleviate the structural extrusion and stress concentration caused by thermal expansion, and avoid wear and performance degradation. The first fixing screw and the second fixing screw are both adjustable and easy-to-maintain fixing structures, which improve assembly efficiency and reduce maintenance costs. Therefore, the present invention solves the technical problem of the lack of axial fixation of the stator shaft in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0017] The structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification so as to facilitate understanding and reading by persons familiar with this technology. They are not used to limit the conditions under which the present invention can be implemented, and therefore have no substantive technical significance. Any structural modification, change in proportion or adjustment of size, without affecting the effects and purposes that can be achieved by the present invention, should still fall within the scope of the technical contents disclosed by the present invention.

[0018] Figure 1 A schematic diagram of the three-dimensional structure of a stator shaft fixing device for an automobile component disclosed in an embodiment of the present invention; Figure 2 It is a structural schematic diagram of a main housing of a motor in a stator shaft fixing device for an automobile component disclosed in an embodiment of the present invention; Figure 3 A schematic structural diagram of a stator shaft in a stator shaft fixing device for an automobile component disclosed in an embodiment of the present invention; Figure 4 It is a front view structural schematic diagram of a stator shaft fixing device for an automobile component disclosed in an embodiment of the present invention; Figure 5 for Figure 4 AA cross-sectional structural diagram; Figure 6 A schematic diagram of the partial structure of a stator shaft fixing device for an automobile component disclosed in an embodiment of the present invention; Figure 7 It is a schematic cross-sectional structure diagram of a first fixing block and a first fixing screw in a stator shaft fixing device for an automobile component disclosed in an embodiment of the present invention; Figure 8 It is a schematic cross-sectional structure diagram of a second fixing block and a second fixing screw in a stator shaft fixing device for an automobile component disclosed in an embodiment of the present invention; Fig. 9 It is a schematic cross-sectional structure diagram of a first fixing block, a second fixing block and a connecting rod in a stator shaft fixing device for an automobile component disclosed in an embodiment of the present invention; Fig.10 The present invention is a schematic structural diagram of a first fixing plate in a stator shaft fixing device for an automobile component disclosed in an embodiment of the present invention.

[0019] Illustration Description: 10. Motor main housing; 11. Boss; 20. stator shaft; 21. first muffler hole; 22. second muffler hole; 23. fifth muffler hole; 24. winding slot; 30. Fixing assembly; 31. First fixing block; 311. First thread groove; 312. First fixing surface; 313. First silencer; 32. Second fixing block; 321. Second thread groove; 322. Second fixing surface; 323. Second silencer; 33. First fixing screw; 331. Third silencer hole; 34. Second fixing screw; 341. Fourth silencer hole; 35. First fixing plate; 351. First fixing part; 352. Second fixing part; 353. Third fixing part; 3531. Fixing hole; 36. Second fixing plate; 37. Connecting rod; 371. First external thread; 372. Second external thread; 373. Third silencer. DETAILED DESCRIPTION

[0020] In order to make the purpose, features and advantages of the present invention more obvious and easy to understand, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described below are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] In the description of the present invention, it should be understood that the terms "upper", "lower", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention 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 of the present invention. It should be noted that when a component is considered to be "connected" to another component, it may be directly connected to the other component or there may be a centrally arranged component at the same time.

[0022] The technical solution of the present invention is further described below with reference to the accompanying drawings and through specific implementation methods.

[0023] The embodiment of the present invention provides a stator shaft fixing device for an automobile component, such as Figures 1 to 10 As shown, it includes a motor main housing 10, a stator shaft 20 and a fixing assembly 30. A boss 11 abutting against the stator shaft 20 is provided in the hollow area of ​​the motor main housing 10, and a gap is set between the outer wall of the stator shaft 20 away from the boss 11 and the inner wall of the motor main housing 10; The fixing assembly 30 includes a first fixing block 31 and a second fixing block 32 that are abutted at opposite ends of the stator shaft 20. A first fixing screw 33 and a second fixing screw 34 are threadedly connected to the motor main housing 10. The first fixing screw 33 abuts against the first fixing block 31, and the second fixing screw 34 abuts against the second fixing block 32. The first fixing block 31, the second fixing block 32 and the boss 11 are all used to radially fix the stator shaft 20. A first fixing plate 35 is disposed at one end of the stator shaft 20 , and a second fixing plate 36 integrally formed with the second fixing block 32 is disposed at the other end of the stator shaft 20 . Both the first fixing plate 35 and the second fixing plate 36 are used to fix the two axial ends of the stator shaft 20 .

[0024] It should be noted that the stator shaft fixing device for automobile parts provided by the present invention performs preliminary positioning with the stator shaft 20 through the boss 11, and cooperates with the fixing of the first fixing block 31 and the second fixing block 32 to jointly fix the stator shaft 20 radially; through the fixing action of the first fixing plate 35 and the second fixing plate 36, the stator shaft 20 is prevented from axial movement, thereby realizing multi-dimensional high-strength fixing of the stator shaft 20, effectively avoiding its displacement or shaking during operation, and improving the reliability and stability of the motor operation. Since the stator shaft 20 and the inner wall of the motor main housing 10 are provided with a gap, a deformation buffer space is formed, which can alleviate the structural extrusion and stress concentration caused by thermal expansion, and avoid wear and performance degradation. The first fixing screw 33 and the second fixing screw 34 are both adjustable and easy-to-maintain fixing structures, which improve assembly efficiency and reduce maintenance costs. Therefore, the present invention solves the technical problem of the lack of axial fixation of the stator shaft 20 in the prior art.

[0025] like Figures 1 to 6 As shown, the number of the first fixing screws 33 and the number of the second fixing screws 34 are both set to two, the two first fixing screws 33 are vertically arranged, and the two second fixing screws 34 are vertically arranged.

[0026] It should be noted that, since the two first fixing screws 33 are arranged vertically and the two second fixing screws 34 are arranged vertically, the clamping force is applied simultaneously from two orthogonal directions, which increases the fit between the first fixing block 31 and the second fixing block 32 and the stator shaft 20, respectively, and makes the fixation more secure; the vertically distributed twin screws can distribute the clamping force, reduce the structural stress concentration, and help to improve the life and impact resistance of the overall motor structure. The two directions can be adjusted independently, and the forces in the two directions can be fine-tuned according to the measurement data during the assembly process; it is easier to achieve concentric installation of the stator shaft 20, which is very critical for high-precision motors. The twin screws arranged in the vertical direction form a cross-compression grid structure; it can effectively resist vibrations in different directions, especially under automotive motor working conditions.

[0027] like Figures 5 to 9 As shown, a connecting rod 37 is connected between the first fixing block 31 and the second fixing block 32. A first thread groove 311 is provided in the first fixing block 31, and one end of the connecting rod 37 is provided with a first external thread 371 threadedly matched with the first thread groove 311; a second thread groove 321 is provided in the second fixing block 32, and one end of the connecting rod 37 is provided with a second external thread 372 threadedly matched with the second thread groove 321.

[0028] It should be noted that, by setting the connecting rod 37, the force uniformity and coordinated compression between the first fixing block 31 and the second fixing block 32 are enhanced, and the displacement of the stator shaft 20 due to insufficient force or looseness on one side is avoided. By rotating the connecting rod 37 clockwise or counterclockwise, the distance between the first fixing block 31 and the second fixing block 32 can be adjusted along the axial direction of the stator shaft 20, realizing high-precision assembly and centering functions, which is suitable for compensating assembly differences caused by thermal expansion and processing tolerances.

[0029] like Figures 5 to 9 As shown, the first fixing block 31 is provided with a first fixing surface 312 which is closely fitted with the outer wall of the stator shaft 20, and the second fixing block 32 is provided with a second fixing surface 322 which is closely fitted with the outer wall of the stator shaft 20; The first fixing surface 312 and the second fixing surface 322 are both arc surfaces. The first external thread 371 and the second external thread 372 are spaced apart and rotate in opposite directions.

[0030] It should be noted that since the first fixed surface 312 and the second fixed surface 322 are both arranged as arc surfaces and are tightly fitted with the outer wall of the stator shaft 20, a larger contact area is provided, ensuring that the pressure distribution between the stator shaft 20 and the first fixed block 31 and the second fixed block 32 is more uniform, thereby reducing stress concentration. Since the first external thread 371 and the second external thread 372 are spaced apart and rotate in opposite directions, this arrangement can effectively increase the symmetry of the tightening force; the two thread structures in opposite directions counteract each other when rotating, which can provide a stronger self-locking effect during operation, enhance the anti-loosening ability of the entire fixing device, and reduce maintenance requirements. The thread layout of the first external thread 371 and the second external thread 372 reduces the path of vibration transmission and avoids the problem of local resonance or stress concentration.

[0031] like Figures 5 to 9 As shown, the stator shaft 20 is provided with a first silencer hole 21 and a second silencer hole 22 along its radial direction, one end of the first silencer hole 21 and the second silencer hole 22 are both connected to the outer wall of the stator shaft 20, and the other end of the first silencer hole 21 and the second silencer hole 22 are both connected to the inner wall of the stator shaft 20; The first fixing block 31 is provided with a first muffler channel 313 communicating with the first muffler hole 21, and the second fixing block 32 is provided with a second muffler channel 323 communicating with the second muffler hole 22. In this embodiment, the shapes of the first muffler channel 313 and the second muffler channel 323 are not limited, and can be elongated or spiral.

[0032] It should be noted that the first silencer channel 313 is connected to the first silencer hole 21, and the second silencer channel 323 is connected to the second silencer hole 22, which reduces the high-frequency and low-frequency noise of the stator shaft 20 during operation, and improves the overall noise control performance of the motor. Especially in automotive motors, this silencer design significantly improves the running stability and quietness of the motor. The setting of the first silencer channel 313 and the second silencer channel 323 not only helps noise control, but also effectively reduces the impact of vibrations generated during the operation of the motor on other components, effectively reduces the resonance phenomenon in the system, and thus enhances the long-term reliability and service life of the motor. Through the connection between the silencer channel and the silencer hole, a set of closed air flow channels is formed to avoid noise leakage.

[0033] like Figures 1 to 9 As shown, the first fixing screw 33 defines a third silencer hole 331 communicating with the first silencer channel 313 , and the second fixing screw 34 defines a fourth silencer hole 341 communicating with the second silencer channel 323 . Both the third silencer hole 331 and the fourth silencer hole 341 are blind holes.

[0034] It should be noted that since the third silencer hole 331 and the fourth silencer hole 341 are both blind holes, a directional silencer path is formed, and its design ensures that the noise transmitted through these silencer holes can be effectively attenuated during operation; the design of the blind hole allows the sound waves to be reflected and scattered in the silencer channel, thereby further reducing the leakage of noise. Through the synergistic effect of the third silencer hole 331 and the first silencer channel 313, and the synergistic effect of the fourth silencer hole 341 and the second silencer channel 323, the high-frequency and low-frequency noises generated when the motor is running are jointly reduced. By designing the through structure of the silencer hole and the silencer channel, the air flow inside the stator shaft 20 can be optimized. The channel can reduce the noise problem caused by the air flow, and is particularly suitable for motor applications with high noise requirements, such as electric vehicle drive systems.

[0035] like Figures 5 to 9 As shown, the first thread groove 311 is connected to the first silencer channel 313 , the second thread groove 321 is connected to the second silencer channel 323 , and a third silencer channel 373 is opened in the connecting rod 37 , and the third silencer channel 373 is used to connect the first silencer channel 313 and the second silencer channel 323 .

[0036] It should be noted that the first silencer channel 313 and the second silencer channel 323 are connected through the third silencer channel 373 to form a connected silencer channel, so that the sound can be relieved inside the system, and the high-frequency and low-frequency noise generated when the motor is running can be effectively attenuated. The third silencer channel 373 is not only used for noise attenuation, but also can alleviate the vibration of the motor, improve the stability of the motor during operation, and reduce the mechanical noise and imbalance caused by vibration. As a channel connecting the first silencer channel 313 and the second silencer channel 323, the third silencer channel 373 also provides a path for the internal airflow, helping the airflow to flow more smoothly.

[0037] Specifically, the connecting rod 37 has three working states, thereby forming multiple silencer systems to meet the actual needs of different silencer degrees: in the first state, by adjusting the position of the connecting rod 37, the third silencer channel 373 is connected to the first silencer channel 313, and the third silencer channel 373 is not connected to the second silencer channel 323; in the second state, by adjusting the position of the connecting rod 37, the third silencer channel 373 is not connected to the first silencer channel 313, and the third silencer channel 373 is connected to the second silencer channel 323; in the third state, by adjusting the position of the connecting rod 37, the third silencer channel 373 is connected to the first silencer channel 313 and the second silencer channel 323 respectively.

[0038] like Figures 1 to 5 As shown, the stator shaft 20 is provided with a fifth silencer hole 23 along its axial direction, which is respectively connected with the first silencer hole 21 and the second silencer hole 22, one end of the fifth silencer hole 23 is connected with the end of the stator shaft 20 close to the first silencer hole 21, and the other end of the fifth silencer hole 23 is closed. Specifically, in order to further achieve the noise reduction effect, the fifth silencer hole 23 can be filled with porous materials, sound-absorbing cotton, foam filling and other noise reduction materials.

[0039] It should be noted that the first silencer hole 21 and the second silencer hole 22 are connected through the fifth silencer hole 23 to form a complete sound wave attenuation channel, providing more efficient noise isolation and attenuation functions, especially when the motor is running, effectively reducing high-frequency noise; through the closed end design, noise leakage is reduced, and the quiet performance of the motor is further enhanced. The vibration of the stator shaft 20 can be effectively alleviated through the first silencer hole 21, the second silencer hole 22 and the fifth silencer hole 23, avoiding the vibration from being directly transmitted to external components, optimizing the vibration attenuation path during the operation of the motor, and improving long-term stability.

[0040] like Figure 1 and Fig.10 As shown, the first fixing plate 35 includes a first fixing portion 351, a second fixing portion 352 and a third fixing portion 353 which are integrally formed structures. The first fixing portion 351 is cylindrically arranged, and the second fixing portion 352 is annularly arranged. The motor main housing 10 is sleeved with the second fixing portion 352, the first fixing portion 351 and the second fixing portion 352 are both in contact with the end surface of the stator shaft 20, and the third fixing portion 353 is provided with a fixing hole 3531 for fixing with the motor main housing 10. In the specific implementation process, the third fixing portion 353 is fastened with the motor main housing 10 by screws, and the number of the fixing holes 3531 is four, and the screws pass through the fixing holes 3531.

[0041] It should be noted that the first fixed disk 35 is an integrated structure with higher overall structural stability, which can effectively resist vibration and impact, and improve the motor's fatigue resistance and long-term reliability under high speed and complex load environments. The first fixing portion 351 and the second fixing portion 352 are both fitted with the end face of the stator shaft 20 to form a double-sided clamping fixation, which reduces the axial clearance of the stator shaft 20 and further avoids the reduction or jamming of the motor efficiency caused by the relative displacement between the stator and the rotor. The second fixing portion 352 forms an embracing positioning structure with the motor main housing 10, which ensures the axial and radial accuracy of the stator shaft 20 installation, effectively reducing the energy loss and vibration noise caused by eccentric operation.

[0042] like Figure 3 As shown, the stator shaft 20 is a cylindrical structure with a hollow interior. A plurality of winding slots 24 for installing motor windings are distributed inside the stator shaft 20. The winding slots 24 are respectively connected to the inner wall of the stator shaft 20 and the opposite ends along the axial direction thereof.

[0043] It should be noted that since the stator shaft 20 is a hollow cylindrical structure, it provides sufficient internal space, reduces the mass of the stator shaft 20, and maintains sufficient strength, which is conducive to the improvement of the lightweight and dynamic response capability of the whole vehicle in the electric system, and is particularly beneficial to equipment with high dynamic performance requirements such as new energy vehicles; the setting of the winding groove 24 facilitates the threading, layout and fixation of the motor winding, and the air inside the motor can flow along the groove to improve the overall heat dissipation effect. The hollow body and internal groove of the stator shaft 20 form a sound wave channel, which can cooperate with other muffler hole structures to achieve standing wave interference or reflection attenuation, play a filtering / buffering role within the structural vibration frequency range, and have good coupling noise reduction performance for both high and low frequency noise.

[0044] Working principle: The present invention provides a stator shaft fixing device for automotive parts, which performs preliminary positioning with the stator shaft 20 through the boss 11, and cooperates with the fixing of the first fixing block 31 and the second fixing block 32 to jointly fix the stator shaft 20 radially; through the fixing action of the first fixing plate 35 and the second fixing plate 36, the stator shaft 20 is prevented from axial movement, thereby realizing multi-dimensional high-strength fixing of the stator shaft 20, effectively avoiding its displacement or shaking during operation, and improving the reliability and stability of the motor operation. Since a gap is provided between the stator shaft 20 and the inner wall of the motor main housing 10, a deformation buffer space is formed, which can alleviate the structural extrusion and stress concentration caused by thermal expansion, and avoid wear and performance degradation. The first fixing screw 33 and the second fixing screw 34 are both adjustable and easy-to-maintain fixing structures, which improve assembly efficiency and reduce maintenance costs.

[0045] Through the use and coordination of the first silencer hole 21, the second silencer hole 22, the third silencer hole 331, the fourth silencer hole 341, the fifth silencer hole 23, the first silencer channel 313, the second silencer channel 323 and the third silencer channel 373, a multi-channel silencer structure is formed. The noise will pass through multiple channels in the process of being transmitted from the inside of the stator shaft 20 to the outside. Each channel reflects, attenuates and interferes with the noise, effectively reducing high-frequency noise and low-frequency noise. The connection design between the silencer hole and the silencer channel is not only to reduce noise, but also to effectively control the vibration of the stator shaft 20. When the vibration propagates in the stator shaft 20, it will be effectively attenuated through the silencer channel, reducing its interference with other mechanical parts. Due to the multi-channel silencer structure and the interconnected design, the vibration of the entire motor system is optimized, avoiding the risks of high-frequency resonance and unbalanced operation.

[0046] As described above, the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features thereof may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A stator shaft fixing device for automobile parts, characterized in that: The motor comprises a main housing (10), a stator shaft (20) and a fixing assembly (30); a boss (11) abutting against the stator shaft (20) is provided in a hollow area of ​​the main housing (10); a gap is provided between an outer wall of a side of the stator shaft (20) away from the boss (11) and an inner wall of the main housing (10); The fixing assembly (30) comprises a first fixing block (31) and a second fixing block (32) which are abutted at opposite ends of the stator shaft (20); a first fixing screw (33) and a second fixing screw (34) are threadedly connected to the motor main housing (10); the first fixing screw (33) abuts against the first fixing block (31); the second fixing screw (34) abuts against the second fixing block (32); the first fixing block (31), the second fixing block (32) and the boss (11) are all used to radially fix the stator shaft (20); A first fixing plate (35) is provided at one end of the stator shaft (20), and a second fixing plate (36) is provided at the other end of the stator shaft (20) and is integrally formed with the second fixing block (32); the first fixing plate (35) and the second fixing plate (36) are both used to fix the two axial ends of the stator shaft (20).

2. The stator shaft fixing device for automobile parts according to claim 1, characterized in that: The number of the first fixing screw rods (33) and the number of the second fixing screw rods (34) are both set to two, the two first fixing screw rods (33) are arranged vertically, and the two second fixing screw rods (34) are arranged vertically.

3. The stator shaft fixing device for automobile parts according to claim 1 or 2, characterized in that: A connecting rod (37) is connected between the first fixing block (31) and the second fixing block (32); a first thread groove (311) is provided in the first fixing block (31), and one end of the connecting rod (37) is provided with a first external thread (371) threadedly matched with the first thread groove (311); a second thread groove (321) is provided in the second fixing block (32), and one end of the connecting rod (37) is provided with a second external thread (372) threadedly matched with the second thread groove (321).

4. The stator shaft fixing device for automobile parts according to claim 3, characterized in that: The first fixing block (31) is provided with a first fixing surface (312) which is tightly fitted with the outer wall of the stator shaft (20), and the second fixing block (32) is provided with a second fixing surface (322) which is tightly fitted with the outer wall of the stator shaft (20); The first fixing surface (312) and the second fixing surface (322) are both arranged as arc surfaces, and the first external thread (371) and the second external thread (372) are spaced apart and rotate in opposite directions.

5. The stator shaft fixing device for automobile parts according to claim 3, characterized in that: The stator shaft (20) is provided with a first silencer hole (21) and a second silencer hole (22) along its radial direction, one end of the first silencer hole (21) and the second silencer hole (22) are both connected to the outer wall of the stator shaft (20), and the other end of the first silencer hole (21) and the second silencer hole (22) are both connected to the inner wall of the stator shaft (20); A first sound-absorbing channel (313) communicating with the first sound-absorbing hole (21) is provided in the first fixing block (31), and a second sound-absorbing channel (323) communicating with the second sound-absorbing hole (22) is provided in the second fixing block (32).

6. The stator shaft fixing device for automobile parts according to claim 5, characterized in that: The first fixing screw (33) is provided with a third sound-absorbing hole (331) communicating with the first sound-absorbing channel (313), and the second fixing screw (34) is provided with a fourth sound-absorbing hole (341) communicating with the second sound-absorbing channel (323); the third sound-absorbing hole (331) and the fourth sound-absorbing hole (341) are both blind holes.

7. The stator shaft fixing device for automobile parts according to claim 6, characterized in that: The first thread groove (311) is connected to the first silencer channel (313), the second thread groove (321) is connected to the second silencer channel (323), and a third silencer channel (373) is provided in the connecting rod (37), the third silencer channel (373) being used to connect the first silencer channel (313) and the second silencer channel (323).

8. The stator shaft fixing device for automobile parts according to claim 7, characterized in that: The stator shaft (20) is provided with a fifth silencer hole (23) along its axial direction, which is respectively connected to the first silencer hole (21) and the second silencer hole (22); one end of the fifth silencer hole (23) is connected to an end of the stator shaft (20) close to the first silencer hole (21); and the other end of the fifth silencer hole (23) is closed.

9. The stator shaft fixing device for automobile parts according to claim 1 or 2, characterized in that: The first fixing plate (35) comprises a first fixing portion (351), a second fixing portion (352) and a third fixing portion (353) which are integrally formed structures; the first fixing portion (351) is arranged in a cylindrical shape, and the second fixing portion (352) is arranged in a circular ring shape; The motor main housing (10) is sleeved with the second fixing portion (352), the first fixing portion (351) and the second fixing portion (352) are both in contact with the end surface of the stator shaft (20), and the third fixing portion (353) is provided with a fixing hole (3531) for fixing the third fixing portion (353) with the motor main housing (10).

10. The stator shaft fixing device for automobile parts according to claim 1, characterized in that: The stator shaft (20) is a cylindrical structure with a hollow interior. A plurality of winding slots (24) for installing motor windings are distributed inside the stator shaft (20). The winding slots (24) are respectively connected to the inner wall of the stator shaft (20) and to two opposite ends along the axial direction thereof.

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