End cover assembly and motor with same

Abstract

The end cover assembly comprises an end cover body and a bearing sleeve, the end cover body is provided with a mounting groove, a positioning step is arranged at the groove bottom of the mounting groove, and a positioning gap is defined between the positioning step and the side wall face of the mounting groove; the bearing sleeve is arranged in the mounting groove, and the bearing sleeve and the mounting groove are enclosed to form a bearing chamber for mounting a bearing; the bearing sleeve comprises a main body part and a boss structure, the outer ring surface of the main body part is attached to the side wall surface of the mounting groove, the boss structure is arranged at the end, close to the groove bottom of the mounting groove, of the main body part, and the boss structure extends out of the inner ring surface of the main body part and is positioned and mounted in the positioning gap; the boss structure and the outer ring of the bearing are oppositely arranged so as to abut against and be attached. According to the technical scheme, by arranging the boss structure abutting against the bearing, the technical problem that in the prior art, due to the fact that the motor bearing moves in the axial direction in the operation process and abuts against the end cover assembly, the end cover assembly is damaged, and then sealing of the end cover assembly fails can be effectively solved.

Description

Technical Field

[0001] This application relates to the field of motor technology, and more specifically, to an end cap assembly and a motor having the same. Background Technology

[0002] Currently, integrated permanent magnet motor systems are gradually becoming an industry trend. These systems achieve a high degree of integration by tightly combining the motor body with the drive control system, providing simpler drive and control solutions for applications. In this integrated design, the end cap plays a crucial role. It not only needs to support the motor rotor and ensure its smooth operation, but also needs to cooperate with the drive to provide the necessary sealing effect to protect the precision components inside the motor from the influence of the external environment. Existing motor designs, especially the manufacturing of the end cap, typically use cast aluminum to balance cost and weight. The lightweight and good thermal conductivity of cast aluminum make it an ideal choice for motor end caps. However, under high torque and complex operating conditions, the limitations of the material properties of cast aluminum parts gradually become apparent, especially the bonding strength between the reinforcing parts and the casting and the reliability of long-term operation.

[0003] However, in practical applications, the technical problem of axial movement of motor bearings during operation, leading to contact with the end cover assembly and subsequent seal failure, is becoming increasingly prominent. During motor operation, bearings may experience slight axial displacement due to load changes or mechanical vibration. Although this displacement is within normal operating parameters, long-term stress impacts the end cover assembly in contact with the bearing. For cast aluminum end covers, the material properties make them prone to fatigue wear under high-intensity, high-frequency mechanical stress, especially on non-load-bearing surfaces. During assembly and use, positional misalignment or impact disassembly may cause micro-fractures or delamination in the casting material. When these micro-defects accumulate to a certain extent, the overall strength of the end cover assembly decreases, and structural failure may even occur under the influence of bearing axial displacement. The most direct consequence is impaired sealing performance of the end cover assembly, allowing external dust, moisture, or other contaminants to enter the motor, severely affecting normal operation and reducing its service life. Summary of the Invention

[0004] The main objective of this application is to provide an end cover assembly and a motor having the same, in order to solve the technical problem in the prior art where the motor bearing moves axially during operation and comes into contact with the end cover assembly, causing damage to the end cover assembly and thus leading to seal failure.

[0005] To achieve the above objectives, according to one aspect of this application, an end cap assembly is provided, which is disposed inside a motor to divide the motor cavity into a motor chamber and an electronics chamber that are independent of each other. The end cap assembly includes an end cap body and a bearing sleeve.

[0006] The end cap body has a mounting groove, and a positioning step is provided at the bottom of the mounting groove. The positioning step and the side wall of the mounting groove form a positioning gap.

[0007] The bearing sleeve is placed in the mounting groove and surrounds the mounting groove to form a bearing chamber for mounting the bearing;

[0008] The bearing sleeve includes a main body and a boss structure that are connected to each other. The main body is a sleeve structure. The outer ring surface of the main body is fitted to the side wall of the mounting groove. The boss structure is located at one end of the main body near the bottom of the mounting groove. The boss structure extends out of the inner ring surface of the main body and is positioned and installed in the positioning gap. One end of the boss structure near the groove opening of the mounting groove is positioned opposite to the outer ring of the bearing for abutment and fit.

[0009] Furthermore, one end of the positioning step near the groove of the mounting slot is flush with one end of the boss near the groove of the mounting slot; or, one end of the positioning step near the groove of the mounting slot is located on the side of the boss structure away from the groove of the mounting slot.

[0010] Furthermore, the boss structure is embedded within the positioning step.

[0011] Furthermore, a first positioning part is provided on the side of the boss structure near the positioning step, and a second positioning part is provided on the side of the positioning step near the boss structure to be positioned and connected with the first positioning part. One of the first positioning part and the second positioning part is a positioning protrusion, and the other is a positioning groove.

[0012] Furthermore, the first positioning part is a positioning groove.

[0013] The locating groove has a rectangular cross-sectional shape along the plane containing the bearing axis; and / or,

[0014] The locating groove has an arc-shaped cross-section along the plane containing the bearing axis; and / or,

[0015] The cross-sectional shape of the positioning groove along the plane containing the bearing axis is triangular.

[0016] Furthermore, there are multiple first positioning parts, which are spaced apart along the axial direction of the bearing.

[0017] Furthermore, there are multiple first positioning parts, which are arranged at radial intervals along the bearing.

[0018] Furthermore, the end cap assembly is die-cast as a single piece; and / or,

[0019] The end cap body is made of cast aluminum; and / or, the bearing sleeve is made of steel.

[0020] According to another aspect of this application, an electric motor is provided, the motor including the aforementioned end cap assembly, the motor also including a housing, the end cap assembly being connected to the housing.

[0021] Furthermore, a sealing groove is formed between the end cap assembly and the housing, and the motor also includes a sealing element installed in the sealing groove. A third positioning part (121) is provided on the first positioning surface of the end cap assembly, and a fourth positioning part is provided on the second positioning surface of the housing to position and cooperate with the third positioning part (121). The third positioning part (121) and the fourth positioning part are positioned and cooperated. The first positioning surface and the second positioning surface are both spaced apart from the sealing groove.

[0022] Furthermore, the dimension of the sealing groove in the first preset direction is smaller than the dimension of the sealing element in the first preset direction. The sealing groove has a compression surface that extends along the second preset direction and is squeezed and fitted with the sealing element. The sealing groove also has a sealing surface that extends along the first preset direction and seals with the sealing element. The first positioning surface and the fourth positioning surface are arranged along the first preset direction.

[0023] Wherein, one of the first preset direction and the second preset direction is the axial direction of the bearing, and the other of the first preset direction and the second preset direction is the radial direction of the bearing.

[0024] Furthermore, the sealing groove includes a first opening groove disposed on the end cap assembly and a second opening groove disposed on the housing, wherein the opening of the first opening groove and the opening of the second opening groove are joined together to form a sealing groove.

[0025] Wherein, the first positioning surface is located at the end face of the opening of the first slot; and / or,

[0026] The second positioning surface is located at the end face of the second opening groove; and / or,

[0027] The end of the first opening groove abuts against the end of the first opening groove.

[0028] Applying the technical solution of this application, the positioning gap between the positioning step on the end cover body and the side wall of the mounting groove provides precise axial positioning and radial limiting for the bearing sleeve, ensuring the accurate position of the bearing sleeve within the mounting groove and preventing the impact of axial movement of the bearing on the end cover assembly during operation. The boss structure of the bearing sleeve not only embeds itself within the positioning gap of the end cover body, achieving stable construction of the bearing chamber, but its end near the mounting groove opening also forms a tight abutment with the outer ring of the bearing. This abutment design effectively restricts the position of the bearing when it moves axially, reducing the axial stress on the end cover assembly and thus lowering the risk of end cover breakage. The specific design of the boss structure ensures its close contact with the outer ring of the bearing. Even if the bearing undergoes axial displacement during motor operation, the boss structure can promptly limit the range of bearing movement, preventing excessive contact with the end cover body and thus protecting the end cover assembly from damage. In summary, by providing a boss structure that abuts against the bearing, this application can effectively solve the technical problem in the prior art where the motor bearing moves axially during operation and abuts against the end cover assembly, causing damage to the end cover assembly and thus leading to sealing failure of the end cover assembly. Attached Figure Description

[0029] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments and descriptions of this application are used to explain this application and do not constitute an undue limitation of this application. In the drawings:

[0030] Figure 1 A cross-sectional view along a vertical plane is shown of one embodiment of the end cap assembly according to this application;

[0031] Figure 2 A cross-sectional view along a vertical plane is shown of an end cap body according to one embodiment of the end cap assembly of this application;

[0032] Figure 3 A partial cross-sectional view along a vertical plane is shown of a first embodiment of the end cap body of an embodiment of the end cap assembly according to this application;

[0033] Figure 4 A partial perspective sectional view of a first embodiment of the end cap body according to an embodiment of the end cap assembly of this application is shown;

[0034] Figure 5 A partial cross-sectional view along a vertical plane is shown of a second embodiment of the end cap body of an end cap assembly according to this application;

[0035] Figure 6 A partial perspective sectional view of a second embodiment of the end cap body according to one embodiment of the end cap assembly of the present application is shown;

[0036] Figure 7A partial cross-sectional view along a vertical plane is shown of a third embodiment of the end cap body according to one embodiment of the end cap assembly of this application;

[0037] Figure 8 A partial perspective sectional view of a third embodiment of the end cap body according to one embodiment of the end cap assembly of this application is shown;

[0038] Figure 9 A perspective schematic diagram of one embodiment of the motor according to this application is shown;

[0039] Figure 10 An embodiment of the motor according to this application is shown. Figure 9 Enlarged view of point A in the image;

[0040] Figure 11 An embodiment of the motor according to this application is shown. Figure 9 Enlarged view of point B in the image.

[0041] The above figures include the following reference numerals:

[0042] 100. End cap body; 101. Mounting groove; 110. Positioning step; 102. Positioning gap; 200. Bearing sleeve; 210. Main body; 220. Boss structure; 221. First positioning part; 300. Bearing; 400. Housing; 500. Sealing groove; 510. Seal; 120. First positioning surface; 410. Second positioning surface; 130. First opening groove; 420. Second opening groove. Detailed Implementation

[0043] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0044] Please refer to Figures 1 to 8As shown, one aspect of this application provides an end cap assembly. The end cap assembly is disposed inside a motor to divide the motor cavity into an independent motor chamber and an electronic chamber. The end cap assembly includes an end cap body 100 and a bearing sleeve 200. The end cap body 100 has a mounting groove 101, and a positioning step 110 is provided at the bottom of the mounting groove 101. The positioning step 110 and the side wall of the mounting groove 101 form a positioning gap 102. The bearing sleeve 200 is disposed in the mounting groove 101 and surrounds the mounting groove 101 to form a shaft for mounting the bearing 300. The bearing housing; wherein the bearing sleeve 200 includes a main body 210 and a boss structure 220 connected to each other. The main body 210 is a sleeve structure. The outer ring surface of the main body 210 is fitted to the side wall surface of the mounting groove 101. The boss structure 220 is located at one end of the main body 210 near the bottom of the mounting groove 101. The boss structure 220 extends out of the inner ring surface of the main body 210 and is positioned and installed in the positioning gap 102. One end of the boss structure 220 near the opening of the mounting groove 101 is positioned opposite to the outer ring of the bearing 300 for abutment and fit.

[0045] By using the end cover assembly provided in this application embodiment, and by providing a boss structure 220 on the bearing sleeve 200 that abuts against the bearing 300, the technical problem in the prior art that the motor bearing 300 moves axially during operation and abuts against the end cover assembly, causing the end cover assembly to break and thus leading to seal failure, can be effectively solved.

[0046] In the above embodiment, an installation groove 101 is designed inside the end cover body 100. The positioning step 110 at the bottom of the groove and the positioning gap 102 between the groove and the side wall of the installation groove 101 provide installation space for the precise installation of the bearing sleeve 200, ensuring the axial position fixation between the bearing sleeve 200 and the end cover body 100. This avoids unnecessary contact between the motor bearing 300 and the end cover body 100 when the motor bearing moves axially, thereby reducing the risk of breakage of the end cover body 100 due to direct axial force. The main body 210 of the bearing sleeve 200 fits tightly with the installation groove 101 of the end cover body 100, while the boss structure 220 specifically enhances the positioning stability and structural strength of the bearing sleeve 200. Part of the boss structure 220 extends out of the inner annular surface of the main body 210 and is installed in the positioning gap 102. This design ensures indirect contact between the bearing 300 and the end cover assembly, rather than direct action on the end cover body 100. The boss structure 220 abuts against the outer ring of the bearing 300, effectively limiting the axial displacement of the bearing 300, reducing the impact on the end cover assembly, and lowering the probability of damage caused by bearing movement. In summary, the end cover body 100, mounting groove 101, positioning step 110, and positioning gap 102 together constitute a stable load-bearing body, providing a precise positioning environment for the bearing sleeve 200. The main body 210 of the bearing sleeve 200 and the boss structure 220, while ensuring precise control of the axial position of the bearing 300, effectively avoid the end cover body 100 directly bearing force, greatly reducing the possibility of end cover assembly damage. Ultimately, this ensures the sealing integrity of the bearing chamber during motor operation, avoiding motor performance degradation and shortened lifespan due to seal failure, thus providing a strong guarantee for the long-term stable operation of the motor.

[0047] Specifically, one end of the positioning step 110 near the opening of the mounting groove 101 is flush with one end of the boss near the opening of the mounting groove 101. The positioning step 110, as part of the end cap body 100, is crucially positioned. When the end of the positioning step 110 near the opening of the mounting groove 101 is flush with the end of the boss structure 220 near the opening of the mounting groove 101, this ensures that the mating surface between the bearing sleeve 200 and the end cap body 100 is flat. Therefore, when the bearing 300 moves, the end faces of the boss structure 220 and the end cap body 100 jointly bear the force from the bearing, reducing local stress on the end cap body 100 and effectively preventing damage to the end cap body 100 caused by local stress concentration.

[0048] Specifically, one end of the positioning step 110 near the opening of the mounting groove 101 is located on the side of the boss structure 220 away from the opening of the mounting groove 101 near the opening of the mounting groove 101. The positioning step 110 is disposed on the inner ring of the boss structure 220, and the positioning step 110 and the boss structure 220 together form a planar structure that abuts against the bearing 300.

[0049] Specifically, the boss structure 220 is embedded within the positioning step 110. The portion of the boss structure 220 embedded within the positioning step 110 ensures the stable position of the bearing sleeve 200 within the end cover body 100. Even when subjected to axial forces transmitted by the bearing 300, it maintains good structural integrity, preventing damage to the end cover assembly due to displacement of the bearing sleeve 200. This design further optimizes the sealing effect. Due to the tight fit between the boss structure 220 and the positioning step 110, an effective sealing barrier is formed. Even when the bearing 300 rotates at high speed or is subjected to axial impact, it maintains a sealed isolation between the bearing chamber and the motor chamber and electronics chamber, preventing the intrusion of contaminants, protecting the operating environment of the internal components of the motor, and extending the service life of the motor.

[0050] Specifically, a first positioning part 221 is provided on the side of the boss structure 220 near the positioning step 110, and a second positioning part is provided on the side of the positioning step 110 near the boss structure 220, which is positioned and connected to the first positioning part 221. One of the first positioning part 221 and the second positioning part is a positioning protrusion, and the other is a positioning groove. The first positioning part 221 is specially provided on the side of the boss structure 220 near the positioning step 110. The first positioning part 221 may be in the form of a positioning protrusion, which is used to form a mechanical lock with the second positioning part on the positioning step 110, restricting the axial and radial movement of the bearing sleeve 200 relative to the end cover body 100, ensuring the positional stability of the bearing 300 under high-speed operation, thereby avoiding potential damage to the end cover assembly caused by the axial movement of the bearing. The cooperation between the first positioning part 221 and the second positioning part, through the combination of the positioning protrusion and the positioning groove, achieves precise positioning between the bearing sleeve 200 and the end cover body 100. This positioning mechanism ensures a tight fit between the two components, especially when the bearing 300 is in operation. It effectively limits the displacement of the bearing sleeve 200, preventing structural damage and sealing failure of the end cover assembly due to axial movement of the bearing. Through the synergistic effect of the first positioning part 221 and the second positioning part, the end cover assembly of this application can maintain its structural stability and sealing reliability even under complex working conditions, significantly improving the operating safety and service life of the motor.

[0051] Specifically, the first positioning part 221 is a positioning groove, and the cross-sectional shape of the positioning groove along the plane containing the axis of the bearing 300 is rectangular.

[0052] The cross-sectional shape of the positioning groove along the plane containing the bearing 300 axis is arc-shaped.

[0053] The cross-sectional shape of the positioning groove along the plane containing the bearing 300 axis is triangular.

[0054] In the end cover assembly design of this application, the first positioning part 221 is designed with three types of positioning grooves. These designs enhance the connection stability and positioning accuracy between the bearing sleeve 200 and the end cover body 100, thereby significantly improving the structural robustness of the entire assembly and the ability to limit the axial displacement of the motor bearing 300.

[0055] In the first embodiment, when the first positioning part 221 is designed as a positioning groove, and the cross-sectional shape of the groove along the plane containing the axis of the bearing 300 is rectangular, this design provides a rigid positioning method between the bearing sleeve 200 and the end cover body 100. The rectangular cross-section positioning groove ensures that when the bearing 300 moves axially, the bearing sleeve 200 can be accurately positioned in the mounting groove 101 of the end cover body 100, avoiding impact and potential damage to the end cover body 100 caused by bearing displacement, and enhancing the sealing performance and operational safety of the component.

[0056] In the second embodiment, if the cross-sectional shape of the positioning groove of the first positioning part 221 is designed to be arc-shaped, this will provide an elastic positioning mechanism for the connection between the bearing sleeve 200 and the end cover body 100. The arc-shaped positioning groove can better adapt to the small radial displacement that the bearing 300 may generate during operation, and mitigate the impact force generated when the bearing is displaced through elastic deformation, thereby reducing the pressure on the end cover body 100, reducing the risk of seal failure, and maintaining a good positioning effect.

[0057] In the third embodiment, when the cross-sectional shape of the positioning groove is triangular, this design further strengthens the positioning connection between the bearing sleeve 200 and the end cap body 100. The triangular cross-section of the positioning groove provides a more stable fixing effect structurally, and its sharp edges can better hold the bearing sleeve 200 in place. Even under extreme axial displacement, it can effectively prevent the bearing sleeve 200 from sliding within the end cap body 100, ensuring the structural integrity and sealing of the entire bearing chamber and avoiding damage to the end cap assembly due to bearing displacement.

[0058] Specifically, there are multiple first positioning parts 221, which are spaced apart along the axial direction of the bearing 300. The arrangement of these multiple first positioning parts 221 provides multiple positioning points for the connection between the bearing sleeve 200 and the end cover body 100. These positioning points are distributed along the axial direction of the bearing 300, ensuring the positional accuracy and stability of the bearing sleeve 200 within the mounting groove 101. When the bearing 300 undergoes axial displacement during operation, these spaced-apart first positioning parts 221 can evenly distribute the axial force borne by the bearing sleeve 200, avoiding structural failure caused by excessive force on a single positioning point, thus effectively preventing damage caused by direct contact between the bearing 300 and the end cover assembly. Furthermore, the arrangement of multiple first positioning parts 221 also optimizes the sealing effect. The cooperation between each first positioning part 221 and the second positioning part not only provides a positioning function along the axial direction of the bearing 300 but also forms multiple sealing contact points, enhancing the sealing performance of the bearing chamber. Even under conditions of 300° bearing displacement or axial impact, these dispersed sealing contact points can still maintain effective isolation between the bearing housing and the motor housing and electronics housing, preventing the intrusion of contaminants, protecting the operating environment of the internal components of the motor, and extending the service life of the motor.

[0059] Specifically, there are multiple first positioning parts 221, which are arranged radially spaced along the bearing 300. The boss structure 220 is not limited to single-point positioning, but achieves balanced radial positioning of the bearing 300 by setting multiple first positioning parts 221. These first positioning parts 221 are distributed radially spaced along the bearing 300, forming a ring positioning mechanism, which ensures the uniform distribution of the contact surface between the bearing sleeve 200 and the end cover body 100. Even if the bearing 300 is subjected to uneven radial force during motor operation, it can effectively disperse stress and reduce the damage caused by local stress concentration to the end cover assembly. The second positioning part on the positioning step 110 matches the multiple first positioning parts 221 to form multiple positioning points. This multi-point positioning design not only improves the stability of the bearing sleeve 200 within the positioning step 110, but also enhances the overall structural strength of the end cover assembly. During motor operation, even if the bearing 300 moves axially, these positioning points effectively restrict its movement, preventing direct contact between the bearing 300 and the end cover assembly. This reduces the risk of damage to the end cover assembly and ensures the bearing chamber's sealing performance remains unaffected. By providing multiple first positioning parts 221, the end cover assembly of this application achieves balanced radial support while ensuring the axial positioning of the bearing 300, effectively preventing material fatigue and structural failure that may result from localized stress concentration. Furthermore, the multi-point positioning mechanism also helps improve the accuracy and stability of the bearing 300 during operation, reducing vibration and noise caused by displacement, thereby improving the overall operating efficiency and user experience of the motor system. In summary, by providing multiple first positioning parts 221 on the side of the boss structure 220 near the positioning step 110, the end cover assembly of this application not only enhances the radial positioning of the bearing 300 but also improves the sealing capability of the bearing chamber and the structural stability of the end cover assembly, providing a strong guarantee for the long-term stable operation of the motor under complex working conditions.

[0060] Specifically, the end cap assembly is integrally die-cast. This application employs an integral die-casting process, which integrally forms the end cap body 100, mounting groove 101, and its positioning steps 110, positioning gaps 102, and other structures in one piece, greatly improving the integration and precision between the various parts of the assembly. The integral die-casting process not only ensures good dimensional consistency of the assembly but also enhances its mechanical strength and wear resistance by controlling the internal microstructure of the casting. This allows the assembly to maintain structural integrity and sealing even when subjected to axial force impact from the bearing 300 during motor operation, effectively avoiding positioning errors and structural loosening problems that may exist in traditional assembly processes.

[0061] The end cap body 100 is made of cast aluminum. Cast aluminum was chosen as the main material for the end cap body 100 not only because of its good thermal conductivity and low cost, but also because its formability allows for easy implementation of complex structural designs, such as mounting grooves 101 and positioning steps 110, in the die-casting process without compromising its overall strength and sealing performance. The lightweight nature of cast aluminum helps reduce the overall weight of the motor system, lowering energy consumption and reducing the requirements for motor support structures, thus facilitating motor miniaturization and weight reduction.

[0062] The bearing sleeve 200 is made of steel. The choice of steel as the material for the bearing sleeve 200 is based on steel's high strength and excellent wear resistance. During motor operation, the bearing sleeve 200, as a crucial support component of the bearing 300, bears and disperses axial forces. The selection of steel ensures that the bearing sleeve 200 maintains good shape and dimensional stability under long-term stress conditions, preventing deformation and displacement of the bearing sleeve 200 due to material fatigue, thereby avoiding any impact on the axial clearance of the bearing 300 and any damage to the sealing performance of the end cover assembly. Furthermore, the high hardness of steel also helps improve the wear resistance of the mating area between the bearing sleeve 200 and the cast aluminum end cover body 100, extending the service life of the entire end cover assembly.

[0063] like Figures 9 to 11 As shown, another aspect of this application provides a motor including the aforementioned end cap assembly. The motor also includes a housing 400, and the end cap assembly is connected to the housing 400.

[0064] Specifically, a sealing groove 500 is formed between the end cover assembly and the housing 400. The motor also includes a seal 510, which is installed in the sealing groove 500. A third positioning part (121) 121 is provided on the first positioning surface 120 of the end cover assembly, and a fourth positioning part is provided on the second positioning surface 410 of the housing 400 to position and cooperate with the third positioning part (121) 121. The third positioning part (121) 121 and the fourth positioning part are positioned and cooperated with each other. The first positioning surface 120 and the second positioning surface 410 are both spaced apart from the sealing groove 500. The sealing groove 500 is cleverly formed between the end cover assembly and the housing 400. This structural design is the key to achieving motor sealing. The existence of the sealing groove 500 provides space for the installation of the seal 510, ensuring that the seal 510 can effectively fit between the end cover assembly and the housing 400 when the motor is running, preventing external dust, moisture and other contaminants from entering, and also preventing the leakage of media such as lubricating oil inside the motor. A third positioning part (121) 121 is provided on the first positioning surface 120 of the end cover assembly, and a fourth positioning part that cooperates with it is arranged on the second positioning surface 410 of the housing 400. This positioning and cooperation design ensures that the end cover assembly and the housing 400 can be accurately aligned during installation and maintain a stable position after installation, effectively avoiding displacement of the seal 510 due to improper installation or operating vibration, and further enhancing the reliability of the entire sealing system. After the third positioning part (121) 121 provided on the first positioning surface 120 cooperates with the fourth positioning part on the second positioning surface 410, the two positioning surfaces do not directly contact the sealing groove 500, but maintain a certain distance from the sealing groove 500. This design ensures that the seal 510 is not only effectively compressed in the sealing groove 500 to form a sealing interface, but also forms an additional sealing layer between the first positioning surface 120 and the second positioning surface 410. The double sealing ensures that the motor can maintain a high level of sealing performance under various operating conditions.

[0065] Specifically, the dimension of the sealing groove 500 in the first preset direction is smaller than that of the sealing element 510 in the first preset direction. The sealing groove 500 has a compression surface extending along a second preset direction and pressing against the sealing element 510. The sealing groove 500 also has a sealing surface extending along the first preset direction and sealing against the sealing element 510. The first positioning surface 120 and the fourth positioning surface are arranged along the first preset direction. One of the first and second preset directions is the axial direction of the bearing 300, and the other is the radial direction of the bearing 300. The dimension of the sealing element 510 in the first preset direction is designed to be larger than that of the sealing groove 500 in the same direction. This dimensional difference causes the sealing element 510 to be pre-compressed when assembled into the sealing groove 500, forming a tight, pressed fit. The compression surface of the sealing groove 500, i.e., the portion extending along the second preset direction, contacts the sealing element 510. By applying radial pressure, the sealing element is embedded into the sealing groove, ensuring a tight, gapless fit between the sealing element and the sealing groove. This greatly enhances the sealing effect and effectively prevents leakage of external contaminants or internal lubricant. The sealing surface of the sealing groove 500 extends along the first preset direction, and it fits against the sealing element 510 in this direction to form a protective barrier. During motor operation, even if there is axial displacement of the bearing 300, the tight fit between the sealing surface and the sealing element 510 can still prevent foreign objects from entering, keep the internal environment of the motor clean, and extend the motor's lifespan. The first positioning surface 120 and the fourth positioning surface are arranged along the first preset direction. This arrangement is designed to provide precise axial positioning of the bearing 300 inside the motor. Whether the first preset direction represents the axial or radial direction of the bearing 300, this design ensures that the relative position between the bearing sleeve 200 and the end cover body 100 is fixed, avoiding increased vibration or noise caused by bearing position changes during motor operation. In particular, when the bearing 300 is subjected to axial force, the arrangement of the first positioning surface 120 and the fourth positioning surface can more effectively limit the axial movement range of the bearing 300, ensuring smooth motor operation and bearing life. Through the collaborative design of the aforementioned components, the motor of this application has reached a new level in terms of sealing performance and bearing positioning accuracy. It can not only withstand harsh environmental conditions and protect the motor from external pollution, but also ensure the stable operation of the internal components of the motor, reduce mechanical wear and energy loss caused by bearing movement, and provide more reliable and longer-lasting working guarantee for motor equipment.

[0066] Specifically, the sealing groove 500 includes a first opening groove 130 disposed on the end cover assembly and a second opening groove 420 disposed on the housing 400. The openings of the first opening groove 130 and the second opening groove 420 are joined together to form the sealing groove 500. A first positioning surface 120 is located at the end face of the opening of the first opening groove 130; a second positioning surface 410 is located at the end face of the opening of the second opening groove 420; and the end of the first opening groove 130 abuts against the end of the second opening groove 420. The first opening groove 130 is located on the outer edge of the end cover assembly, while the second opening groove 420 is located on the inner side of the housing 400. The openings of both are precisely aligned and joined during assembly to form the sealing groove 500. This design utilizes the geometric complementarity of the two parts to ensure the continuity of the sealing groove 500 boundary. Even if vibration or displacement occurs during motor operation, the integrity of the sealing groove 500 can be maintained, effectively preventing interference from the external environment to the internal components of the motor and ensuring the stability and safety of motor operation. The first positioning surface 120 is located at the end face of the first opening groove 130, and the second positioning surface 410 is located at the end face of the second opening groove 420. This positioning surface design, combined with the splicing structure of the opening grooves, provides additional protection for the positioning between the end cover assembly and the housing 400 while the sealing groove 500 is formed. The axial contact between the first positioning surface 120 and the second positioning surface 410 not only defines the axial position of the end cover assembly but also ensures precise radial alignment, enhancing the overall structural stability of the motor. At the splicing point of the first opening groove 130 and the second opening groove 420, their ends abut tightly, further strengthening the sealing performance of the sealing groove 500. The direct abutment of the ends eliminates any possible gaps, ensuring the stable position of the sealing ring within the sealing groove 500. Even when the motor rotates at high speed or is subjected to external impact, it ensures that the sealing ring will not shift or wear due to vibration, thereby improving the durability and reliability of the sealing effect. In summary, the coordinated design of the first opening groove 130 and the second opening groove 420 ensures the formation of the sealing groove 500 and the stable installation of the sealing ring, while the positioning of the first positioning surface 120 and the second positioning surface 410 enhances the assembly positioning accuracy between the end cover assembly and the housing 400. Furthermore, the abutment design at the ends of the first opening groove 130 and the second opening groove 420 achieves a tight closure of the sealing groove 500 boundary, significantly enhancing the motor's sealing performance and operational stability. This series of innovative designs with coordinated relationships provides a solid foundation for the long-term reliable operation of the motor in complex environments.

[0067] As can be seen from the above description, the embodiments of this application achieve the following technical effects:

[0068] The synergistic effect of the end cap body 100 and the bearing sleeve 200 optimizes the fixing and support method of the bearing 300, enabling the bearing 300 to achieve more stable axial and radial positioning during motor operation. The boss structure 220 of the bearing sleeve 200 is embedded in the positioning step 110 and the positioning gap 102, which not only improves the compactness of the structure but also enhances the sealing ability of the bearing chamber, preventing lubricating oil leakage and impurity intrusion. The fit between the main body 210 and the side wall of the mounting groove 101, as well as the positioning design of the boss structure 220, together ensure the smooth operation of the bearing 300 and the operating efficiency of the motor.

[0069] The innovative design of the positioning step 110, through precise positioning with the boss structure 220, ensures a reliable connection between the bearing sleeve 200 and the end cover body 100. Whether one end of the positioning step 110 is flush with the boss structure 220 or one end of the positioning step 110 is located on the other side of the boss structure 220, it can effectively limit the axial movement of the bearing sleeve 200, avoid vibration and displacement during motor operation, and thus enhance the stability of the motor.

[0070] The positioning cooperation between the first positioning part 221 and the second positioning part, through the combination of positioning protrusions and positioning grooves, achieves stable positioning of the bearing sleeve 200 within the positioning step 110. The multiple first positioning parts 221 provided on the boss structure 220, whether distributed along the axial direction of the bearing 300 or at radial intervals, effectively increase the contact points between the bearing sleeve 200 and the end cover body 100, improving the accuracy and reliability of positioning and support.

[0071] The die-casting integrated molding process of the end cap assembly, combining the cast aluminum end cap body 100 and the steel bearing sleeve 200, not only optimizes the production process and reduces manufacturing costs, but also improves the strength and durability of the structure. The lightweight nature of cast aluminum and the high strength of steel jointly promote the improvement of the overall performance of the motor, achieving a good balance between lightweight structure and high load-bearing capacity.

[0072] In the overall design of the motor, the combination of the sealing groove 500 and the sealing element 510, through the precise splicing of the first opening groove 130 and the second opening groove 420, and the positioning cooperation between the third positioning part (121) 121 and the fourth positioning part, constructs a highly efficient sealing barrier inside and outside the motor. The precise matching of the dimensions of the sealing groove 500 and the sealing element 510, as well as the design of the compression surface and sealing surface along the preset direction, further enhance the sealing effect, enabling the motor to maintain stable operation in harsh environments and extending the service life of the motor.

[0073] The innovative design of the sealing groove 500, through dimensional control in the first and second preset directions, ensures effective compression and fit of the sealing element 510, forming a dual sealing mechanism that significantly improves the motor's sealing performance. The arrangement of the first positioning surface 120 and the fourth positioning surface along the first preset direction not only achieves reliable axial positioning but also strengthens the integrity of the motor structure through the end abutment of the first opening groove 130 and the second opening groove 420, ensuring the stability and safety of the motor during operation.

[0074] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. An end cap assembly disposed inside a motor to divide the motor cavity into an independent motor chamber and an electronics chamber, characterized in that, The end cap assembly includes: End cap body (100), the end cap body (100) has a mounting groove (101), a positioning step (110) is provided at the bottom of the mounting groove (101), and a positioning gap (102) is formed between the positioning step (110) and the side wall of the mounting groove (101). A bearing sleeve (200) is disposed within the mounting groove (101) and encloses the mounting groove (101) to form a bearing chamber for mounting the bearing (300); The bearing sleeve (200) includes a main body (210) and a boss structure (220) connected to each other. The main body (210) is a sleeve structure. The outer ring surface of the main body (210) is fitted to the side wall surface of the mounting groove (101). The boss structure (220) is located at one end of the main body (210) near the bottom of the mounting groove (101). The boss structure (220) extends out of the inner ring surface of the main body (210) and is positioned in the positioning gap (102). One end of the boss structure (220) near the opening of the mounting groove (101) is positioned opposite to the outer ring of the bearing (300) for abutment and fit.

2. The end cap assembly according to claim 1, characterized in that, One end of the positioning step (110) near the opening of the mounting groove (101) is flush with one end of the boss near the opening of the mounting groove (101); or, One end of the positioning step (110) near the opening of the mounting groove (101) is located on the side of the boss structure (220) away from the opening of the mounting groove (101) near the opening of the mounting groove (101).

3. The end cap assembly according to claim 1, characterized in that, The boss structure (220) is embedded in the positioning step (110).

4. The end cap assembly according to claim 1, characterized in that, The boss structure (220) has a first positioning part (221) on the side near the positioning step (110), and the positioning step (110) has a second positioning part on the side near the boss structure (220) that is positioned and connected with the first positioning part (221). One of the first positioning part (221) and the second positioning part is a positioning protrusion, and the other is a positioning groove.

5. The end cap assembly according to claim 4, characterized in that, The first positioning part (221) is a positioning groove. The locating groove has a rectangular cross-sectional shape along the plane containing the axis of the bearing (300); and / or, The positioning groove has an arc-shaped cross-section along the plane containing the axis of the bearing (300); and / or, The cross-sectional shape of the positioning groove along the plane containing the axis of the bearing (300) is triangular.

6. The end cap assembly according to claim 4, characterized in that, There are multiple first positioning parts (221), and the multiple first positioning parts (221) are arranged at intervals along the axial direction of the bearing (300).

7. The end cap assembly according to claim 4, characterized in that, There are multiple first positioning parts (221), and the multiple first positioning parts (221) are arranged at radial intervals along the bearing (300).

8. The end cap assembly according to claim 1, characterized in that, The end cap assembly is die-cast in one piece; and / or The end cap body (100) is made of cast aluminum; and / or, The bearing sleeve (200) is made of steel.

9. A motor comprising an end cap assembly according to any one of claims 1 to 8, characterized in that, The motor also includes a housing (400), and the end cap assembly is connected to the housing (400).

10. The motor according to claim 9, characterized in that, The end cap assembly and the housing (400) form a sealing groove (500). The motor also includes a sealing element (510), which is installed in the sealing groove (500). A third positioning part is provided on the first positioning surface (120) of the end cap assembly. A fourth positioning part is provided on the second positioning surface (410) of the housing (400) to position and cooperate with the third positioning part. The third positioning part and the fourth positioning part are positioned and cooperated. The first positioning surface (120) and the second positioning surface (410) are both spaced apart from the sealing groove (500).

11. The motor according to claim 10, characterized in that, The dimension of the sealing groove (500) in the first preset direction is smaller than the dimension of the sealing element (510) in the first preset direction. The sealing groove (500) has a compression surface that extends along the second preset direction and is squeezed and fitted to the sealing element (510). The sealing groove (500) has a sealing surface that extends along the first preset direction and is sealed to the sealing element (510). The first positioning surface (120) and the fourth positioning surface are arranged along the first preset direction. Wherein, one of the first preset direction and the second preset direction is the axial direction of the bearing (300), and the other of the first preset direction and the second preset direction is the radial direction of the bearing (300).

12. The motor according to claim 10, characterized in that, The sealing groove (500) includes a first opening groove (130) provided on the end cap assembly and a second opening groove (420) provided on the housing (400), wherein the opening of the first opening groove (130) and the opening of the second opening groove (420) are spliced ​​together to form the sealing groove (500). Wherein, the first positioning surface (120) is located at the end face of the opening of the first opening groove (130); and / or, The second positioning surface (410) is located at the end face of the groove of the second opening groove (420); and / or, the end of the first opening groove (130) abuts against the end of the first opening groove (130).

Images