Splicing structure of motor shell and bearing sleeve

Abstract

The utility model discloses a splicing structure of a motor casing and a bearing sleeve, which comprises a motor casing main body, and the motor casing main body comprises a rotating shaft nesting structure, a nesting matching circular hole structure and a cooling water path. The rotating shaft nesting structure comprises a rotating shaft through hole structure and an outer wall extending in the direction of entering and exiting a rotating shaft through hole. The rotating shaft through hole structure is arranged at a central convex part of the rotating shaft nesting structure and comprises a first circular truncated cone, and a central through hole for placing a bearing is formed in the first circular truncated cone; a second circular truncated cone is arranged on the first circular truncated cone, and an embedding hole is formed between the first circular truncated cone and the second circular truncated cone; the beneficial effects of the utility model lie in that the position of the bearing is prevented from deviating after the motor is used for a long time, the service life of the bearing is prolonged, and the operation stability of the motor is guaranteed; and the bearing disassembly, replacement and maintenance cost is reduced. Through effective water-cooling heat dissipation, parts are prevented from being overheated, the motor is kept at a low working temperature, and higher power is provided.

Description

Technical Field

[0001] The utility model relates to the field of motor casings, and particularly to a splicing structure of a motor casing and a bearing sleeve. Background Art

[0002] The motor is one of the main power devices at present and is widely used in the industrial field. With the progress of control technology and battery technology, the motor is also widely used in the automotive power system.

[0003] However, due to the relatively harsh working environment required by the complex automotive power system, the practical application of the motor in the automotive power system faces quite a few challenges. First of all, after the existing motor bearing steel sleeve structure is used for a period of time, since the bearing is fitted in the hole provided in the motor casing and no specific positioning device is designed, the bearing will inevitably loosen and shift in position, resulting in increased bearing wear, vibration and noise, and reducing the motor life. Secondly, a large amount of heat is generated when the motor is working, which causes the temperature of the internal components of the motor to rise. At this time, maintaining the stability of the internal temperature of the motor is the key to ensuring the normal operation of the motor. In the existing motor, a blowing device or a heat dissipation plate is generally used to blow out the hot air or dissipate heat through the heat dissipation plate to reduce the temperature of the motor components. However, these methods cannot dissipate heat from each component in time and the heat dissipation effect is poor. Only after the heat is transferred to the air through heat transfer can effective heat dissipation be carried out, which results in the local temperature of some components not being able to be reduced in time, and these components are extremely prone to overheating and damage during the long-term operation of the motor. Summary of the Utility Model

[0004] (1) Problems to be Solved

[0005] The technical problem to be solved by the utility model is to provide a splicing structure of a motor casing and a bearing sleeve in view of the current situation of the prior art.

[0006] (2) Technical Solutions

[0007] The utility model is realized through the following technical solutions: The utility model provides a splicing structure of a motor casing and a bearing sleeve, which includes a motor casing main body. The motor casing main body includes a rotating shaft nesting structure, a nested mating circular hole structure and a cooling water channel. The rotating shaft nesting structure includes a rotating shaft through hole structure and an outer wall extending along the direction of entering and exiting the rotating shaft through hole. The rotating shaft through hole structure is arranged on the central convex part of the rotating shaft nesting structure. The rotating shaft through hole structure includes a first frustum of a cone, and a central through hole for placing a bearing is provided on the first frustum of a cone. A second frustum of a cone is arranged on the first frustum of a cone, and a fitting hole is arranged between the first frustum of a cone and the second frustum of a cone. The radius of the circular hole of the second frustum of a cone is larger than the radius of the circular hole of the first frustum of a cone. Main magnetic poles and commutation poles are arranged on the outer wall.

[0008] By adopting the above technical solution, a bent water channel is provided on the main body of the motor housing. When the motor is working, cold water is introduced to take away the heat of the components inside the motor, with a fast cooling rate and good stability. In the main body of the motor housing, the rotating shaft through-hole structure of the rotating shaft nested structure is used to place the bearing, and the first frustum is used to place the bearing sleeve. The bearing sleeve is installed on the first frustum through the fitting hole and is in close fit with the bearing. Through this design, the offset of the bearing position can be prevented from causing wear, the service life of the bearing is increased, and the stability of the motor operation is ensured.

[0009] Further, the main magnetic pole is composed of thin steel sheet laminations stacked together.

[0010] Further, the thickness of the thin steel sheet lamination is between 0.2 mm and 3 mm.

[0011] Further, a third frustum is provided on the second frustum, and an outer edge splicing shell is provided on the third frustum.

[0012] Further, a fitting groove is provided at one end of the third frustum and the outer edge splicing shell.

[0013] Further, through holes are provided on the cross-section at the other end of the outer wall opposite to the main body of the motor housing.

[0014] Further, a plurality of connecting columns are distributed inside the outer wall.

[0015] Further, a splicing plate shell is installed on the main body of the motor housing and is processed with connecting holes of different sizes.

[0016] Further, the cooling water channel includes a cooling water channel inlet and a cooling water channel outlet.

[0017] (III) Beneficial Effects

[0018] 1. By setting the rotating shaft nested structure in the present utility model, the bearing is placed in the rotating shaft through-hole structure, and the bearing sleeve is installed on the first frustum through the fitting hole and is in close fit with the bearing. It prevents the offset of the bearing position and wear after long-term use of the motor, increases the service life of the bearing, and ensures the stability of the motor operation; reduces the cost of bearing disassembly, replacement, and maintenance.

[0019] 2. By introducing cooling water through the cooling water channel inlet on the motor housing in the present utility model, the cooling water flows along the cooling water channel through the high-temperature parts of the components, and the cooling water flows out from the cooling water channel outlet with the heat generated by the rotation of the motor, which can effectively reduce the temperature of the components in a timely manner, ensure the normal operation of the motor, and extend the service life of the motor. In addition, through effective heat dissipation, the motor can maintain a lower working temperature and output a higher power density, that is, provide a greater power in the same space. Description of the Drawings

[0020] The accompanying drawings, which form a part of this application, are used to provide a further understanding of the present utility model. The schematic embodiments and descriptions thereof of the present utility model are used to explain the present utility model and shall not constitute an improper limitation to the present utility model.

[0021] Figure 1 is the front three-dimensional view of a splicing structure of a motor housing and a bearing sleeve according to the present utility model;

[0022] Figure 2 is the back three-dimensional view of a splicing structure of a motor housing and a bearing sleeve according to the present utility model;

[0023] Figure 3 is the structural schematic diagram of a rotating shaft through-hole structure in a splicing structure of a motor housing and a bearing sleeve according to the present utility model;

[0024] The reference numerals are explained as follows:

[0025] 1. Motor housing main body; 2. Rotating shaft nesting structure; 3. Nesting and mating circular hole structure; 4. Rotating shaft through-hole structure; 5. Outer wall; 6. Central convex part; 7. First frustum; 8. Central through-hole; 9. Second frustum; 10. Fitting hole; 11. Main pole; 12. Commutating pole; 13. Thin steel sheet punching; 14. Third frustum; 15. Outer edge splicing shell; 16. Fitting groove; 17. Through-hole; 18. Connecting column; 19. Assembly plate shell; 20. Connecting hole; 21. Cooling water channel; 22. Cooling water channel inlet; 23. Cooling water channel outlet. Detailed implementation manners

[0026] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0027] In the description of this application, it should be understood that the orientation or positional relationship indicated by terms such as "thickness", "upper", "lower", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing this application 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 should not be construed as a limitation to this application.

[0028] Please refer to Figures 1 - 3, the present utility model provides a technical solution: a splicing structure of a motor housing and a bearing sleeve, including a motor housing main body 1, the motor housing main body 1 includes a rotating shaft nesting structure 2, a nesting and mating circular hole structure 3 and a cooling water channel 21. The rotating shaft nesting structure 2 includes a rotating shaft through hole structure 4 and an outer wall 5 extending along the direction of entering and exiting the rotating shaft through hole. The rotating shaft through hole structure 4 is arranged on the central convex part 6 of the rotating shaft nesting structure 2, and the rotating shaft through hole structure 4 includes a first frustum 7, and there is a central through hole 8 for placing a bearing on the first frustum 7; a second frustum 9 is arranged on the first frustum 7, and a fitting hole 10 is arranged between the first frustum 7 and the second frustum 9. The radius of the circular hole of the second frustum 9 is greater than the radius of the circular hole of the first frustum 7. The outer wall 5 is provided with main magnetic poles 11 and commutating poles 12.

[0029] Preferably, the main magnetic pole 11 is composed of thin steel sheet punching pieces 13 stacked together. The thickness of the thin steel sheet punching pieces 13 is between 0.2 mm and 3 mm. This design can significantly reduce the eddy current loss and hysteresis loss of the motor, thereby improving the efficiency and energy utilization rate of the motor. In addition, the thin steel sheet punching pieces 13 can improve the magnetic circuit characteristics, reduce the magnetic leakage and non-uniformity of the magnetic field, and contribute to improving the performance and stability of the motor. At the same time, the structure of the punching pieces also helps to reduce the mechanical noise and vibration during the operation of the motor, meeting the application scenarios with high noise requirements in the automotive power system.

[0030] Preferably, a third frustum 14 is arranged on the second frustum 9, and an outer edge splicing shell 15 is arranged on the third frustum 14. The second frustum 9, the third frustum 14 and the outer edge splicing shell 15 are used for fitting and assembling with other components in the motor, playing a role in fixing and locking the rotating shaft nesting structure 2.

[0031] Preferably, a fitting groove 16 is opened at one end of the third frustum 14 and the outer edge splicing shell 15. The groove is used for fitting and assembling with other components in the motor, facilitating the assembly and disassembly of the rotating shaft nesting structure 2.

[0032] Preferably, a through hole 17 is arranged on the cross-section of the other end of the outer wall 5 opposite to the motor housing main body 1. The through hole 17 is used for fitting and assembling with other components in the motor, facilitating the assembly and disassembly of the motor.

[0033] Preferably, a plurality of connecting columns 18 are distributed inside the outer wall 5. The connecting columns 18 are used for nested connection with other components in the motor.

[0034] Preferably, a splicing plate shell 19 is installed on the motor housing main body 1 and is processed with connecting holes 20 of different sizes. The connecting holes 20 are used for connecting and fixing the motor housing main body 1 with other devices, providing a stable supporting force for the motor housing main body 1.

[0035] Preferably, the cooling water path 21 includes a cooling water path inlet 22 and a cooling water path outlet 23. Its functions are as follows: heat dissipation and cooling, which help the motor dissipate heat effectively, avoid overheating and maintain a safe operating temperature; improve efficiency and power density, keeping the temperature low helps improve the efficiency and power output density of the motor; extend the service life of the motor, reduce thermal stress and extend the service life of the motor; cope with high loads and high ambient temperatures, maintain a stable operating temperature under challenging conditions, and ensure that the motor performance is not affected.

[0036] By adopting the above technical solution, the implementation mode of this embodiment is as follows: a curved cooling water path 21 is provided on the motor housing main body 1. When the motor is working, cold water is introduced from the cooling water path inlet 22 and discharged from the cooling water path outlet 23, taking away the heat of the components inside the motor, with a fast cooling rate and good stability. In the motor housing main body 1, the shaft through-hole structure 4 of the shaft nested structure 2 is used to place the bearing, and the first frustum 7 is used to place the bearing sleeve. The bearing sleeve is fitted and installed on the first frustum 7 through the fitting hole 10 and is in close contact with the bearing; during the motor forming and assembling, the bearing sleeve locks the bearing in the central through-hole 8. Through this design, the offset of the bearing position can be prevented from causing wear, the service life of the bearing is increased, and the stability of the motor operation is ensured.

[0037] The foregoing description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A splicing structure of a motor housing and a bearing sleeve, characterized in that Comprising: A motor housing main body, the motor housing main body including a rotating shaft nesting structure, a nested mating round hole structure and a cooling water path; the rotating shaft nesting structure including a rotating shaft through hole structure and an outer wall extending along the direction of entering and exiting the rotating shaft through hole; the rotating shaft through hole structure being provided at the central convex portion of the rotating shaft nesting structure, the rotating shaft through hole structure including a first frustum, having a central through hole on the first frustum for placing a bearing; a second frustum being provided on the first frustum, and a fitting hole being provided between the first frustum and the second frustum; main magnetic poles and commutation poles being provided on the outer wall.

2. The splicing structure of a motor housing and a bearing sleeve according to claim 1, wherein: The main magnetic poles are composed of thin steel sheet punching pieces stacked together.

3. The splicing structure of a motor housing and a bearing sleeve according to claim 2, characterized in that: The thickness of the thin steel sheet punching pieces is between 0.2 mm and 3 mm.

4. A splicing structure of a motor housing and a bearing sleeve according to claim 1, characterized in that: A third frustum is provided on the second frustum, and an outer edge splicing shell is provided on the third frustum.

5. The splicing structure of a motor housing and a bearing sleeve according to claim 4, characterized in that: A fitting groove is provided at one end of the third frustum and the outer edge splicing shell.

6. The splicing structure of a motor housing and a bearing sleeve according to claim 4, characterized in that: A through hole is provided on the cross section of the other end of the outer wall opposite to the motor housing main body.

7. The splicing structure of a motor housing and a bearing sleeve according to claim 1, wherein; A plurality of connecting columns are distributed inside the outer wall.

8. The splicing structure of a motor housing and a bearing sleeve according to claim 1, characterized in that: A splicing plate shell is installed on the motor housing main body and connection holes of different sizes are machined.

9. A splicing structure of a motor housing and a bearing sleeve according to claim 1, characterized in that: The cooling water path includes a cooling water path inlet and a cooling water path outlet.

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