Hub motor skeleton oil seal fixing structure

Abstract

The application relates to the technical field of skeleton oil seal fixing, in particular to a hub motor skeleton oil seal fixing structure which acts on a skeleton oil seal, is installed on a hub motor and comprises a rubber cover and an oil seal blocking surface arranged on the inner side of the rubber cover, the oil seal blocking surface is protruded towards the outer side of the rubber cover to form an annular boss, the oil seal blocking surface is used as a direct stress surface to isolate the direct action of external force on the skeleton oil seal, the risk of skeleton oil seal falling off is reduced, the edge of the oil seal blocking surface is vertically provided with an inner buckle, a limiting protrusion which faces the inner side of the oil seal blocking surface is arranged on the inner buckle, the oil seal blocking surface is axially limited by abutting against the upper surface of the skeleton oil seal, the skeleton oil seal is prevented from loosening due to vibration or external force, the skeleton oil seal in the hub motor is in a suspended state, the skeleton oil seal cannot be easily loosened or fallen off even if the skeleton oil seal is slightly touched or subjected to external force, the risk of lubricating oil leakage is reduced, and the normal operation and performance of the hub motor are ensured.

Description

Technical Field

[0001] This application relates to the field of oil seal fixing technology, and in particular to a wheel hub motor oil seal fixing structure. Background Technology

[0002] The skeleton oil seal is a key component used to seal rotating shaft parts, reducing lubricating oil leakage and blocking external impurities. The skeleton oil seal cap, as a supporting component, enhances the stability of the sealing structure, protects the skeleton oil seal from high temperature or chemical corrosion, and helps to fix the position of the skeleton oil seal. Together, they form a sealing barrier in hub motor equipment.

[0003] In related technologies, when installing the skeleton oil seal, the skeleton oil seal is first pressed onto the skeleton oil seal cover, and then the cover is installed onto the wheel hub motor.

[0004] However, during installation, it was found that the oil seal skeleton was not securely fixed inside the hub motor, but was in a suspended state. Therefore, even if the oil seal skeleton was slightly touched or subjected to external force, it was easy to loosen or fall off. This unstable installation state may cause lubricating oil leakage during the use of the hub motor, thereby affecting the normal operation and performance of the hub motor. Utility Model Content

[0005] To address the aforementioned issues, this application provides a hub motor frame oil seal fixing structure.

[0006] The technical solution for the hub motor frame oil seal fixing structure provided in this application is as follows:

[0007] A hub motor frame oil seal fixing structure is provided, which acts on the frame oil seal and is installed on the hub motor. The frame oil seal is used to fit onto the stator bracket and includes a rubber cover. An oil seal baffle is provided on the inner side of the rubber cover. The oil seal baffle protrudes outward from the rubber cover to form an annular boss. Several inward buckles are provided on the edge of the oil seal baffle. Several inward buckles are vertically fixed to the edge of the oil seal baffle. Each inward buckle is provided with a limiting protrusion. The protruding direction of the limiting protrusion is towards the inner side of the oil seal baffle. The frame oil seal is snapped into the oil seal baffle.

[0008] By adopting the above technical solution, an oil seal baffle is provided on the inner side of the rubber cap, providing installation space for the skeleton oil seal. The oil seal baffle forms an annular protrusion facing the outer side of the rubber cap. As a direct force-bearing surface, the annular protrusion effectively isolates external forces from directly acting on the skeleton oil seal, reducing the occurrence of the skeleton oil seal falling off due to external forces. At the same time, when the skeleton oil seal is installed on the oil seal baffle, the inwardly recessed limiting protrusion abuts against the upper surface of the skeleton oil seal, axially limiting the skeleton oil seal and reducing the loosening or falling off of the skeleton oil seal due to vibration or external forces. This solves the problem that even if the skeleton oil seal is in a suspended state inside the wheel hub motor, it will not easily loosen or fall off when subjected to slight touch or external force, reducing the risk of lubricating oil leakage and thus ensuring the normal operation and performance of the wheel hub motor.

[0009] Preferably, the gap between the inner wall of the annular boss and the outer wall of the stator support is less than 0.5 mm.

[0010] By adopting the above technical solution, this application controls the gap between the inner wall of the annular boss and the outer wall of the stator support to within 0.5mm. This effectively suppresses the displacement tendency of the skeleton oil seal towards the stator support when the cover is subjected to external force, reducing the sealing failure problem caused by the deformation or displacement of the skeleton oil seal. This setting not only maintains a safe distance between the skeleton oil seal and the end face of the stator support, reducing the leakage of lubricating oil due to sealing failure, but also reduces the abnormal contact between the skeleton oil seal and the stator support, reducing operating friction loss and vibration noise, thereby ensuring the stability of the internal lubrication system of the hub motor, and ultimately achieving reliable operation and high-efficiency output of the hub motor under complex working conditions.

[0011] Preferably, the limiting protrusion is provided with an inclined guide surface, which is used to guide the installation between the skeleton oil seal and the oil seal stop surface.

[0012] By adopting the above technical solution, the skeleton oil seal can move smoothly along the inclined guide surface during the pressing process of the oil seal stop, reducing the additional resistance caused by direct collision or jamming, thereby simplifying the installation operation, improving the installation efficiency, and ensuring the smoothness and accuracy of the skeleton oil seal installation.

[0013] Preferably, the inner buckle has elastic deformation.

[0014] By adopting the above technical solution, during the installation process, the inner buckle can deform using its own elastic properties, making it easier for the skeleton oil seal to snap into the oil seal stop surface. This elastic deformation not only simplifies the installation steps but also reduces the installation difficulty.

[0015] Preferably, the oil seal baffle is provided with a plurality of arc-shaped protrusions in the circumferential direction, the plurality of arc-shaped protrusions are vertically fixed to the edge of the oil seal baffle, and the plurality of arc-shaped protrusions are spaced apart to form an inner buckle groove, the inner buckle being placed inside the inner buckle groove.

[0016] By adopting the above technical solution, the inner groove provides a position for the inner snap, ensuring that the inner snap can be accurately positioned and abut against the skeleton oil seal during installation. The side wall of the arc-shaped protrusion abuts against the outer wall of the skeleton oil seal, further limiting the skeleton oil seal, reducing axial movement of the skeleton oil seal, and improving the positioning accuracy and connection stability of the skeleton oil seal installation.

[0017] Preferably, an installation hole is provided in the middle of the groove wall of the oil seal baffle, and the installation hole extends through the upper and lower surfaces of the oil seal baffle.

[0018] By adopting the above technical solution, the rubber cap and the oil seal skeleton can be accurately positioned and fixed on the motor housing through the mounting holes, reducing the deformation of the oil seal skeleton or the decline in sealing performance caused by installation errors.

[0019] Preferably, the oil-air groove has a plurality of abutment holes on its groove wall, and the abutment holes are arranged circumferentially along the contour direction of the oil seal baffle.

[0020] By adopting the above technical solution, the abutment holes provide a direct contact point between external tools and the skeleton oil seal, so that when disassembling the skeleton oil seal, external tools can abut against the skeleton oil seal through these abutment holes, simplifying the disassembly process and improving maintenance efficiency.

[0021] Preferably, the outer edge of the rubber cap and the inner edge of the oil seal are both provided with rounded corners.

[0022] By adopting the above technical solutions, the rounded corners of the outer edge of the rubber cap eliminate the sharp edges of the rubber cap, significantly reducing the risk of operators being scratched or cut when installing or removing the skeleton oil seal. It also allows operators to access the edge of the rubber cap more comfortably and smoothly, thereby improving the convenience and efficiency of the installation process. The rounded corners of the oil seal face effectively reduce the damage to the skeleton oil seal caused by friction or collision with the groove wall of the oil seal face during installation by eliminating the sharp edges of the inner edge of the oil seal face.

[0023] Preferably, the cap is integrally molded.

[0024] By adopting the above technical solution, the one-piece molding eliminates the assembly gaps and connection weaknesses of the split structure, significantly improves the structural strength and sealing reliability, ensures the dimensional accuracy and positional consistency of each component, and thus optimizes the installation and positioning accuracy of the skeleton oil seal.

[0025] In summary, this application includes at least one of the following beneficial technical effects:

[0026] 1. An oil seal baffle is set on the inner side of the rubber cap to provide installation space for the skeleton oil seal. The oil seal baffle forms an annular protrusion facing outward as a direct force-bearing surface, effectively isolating external forces from acting directly on the skeleton oil seal and significantly reducing the risk of the skeleton oil seal falling off. At the same time, several internal buckles are vertically fixed on the edge of the oil seal baffle. The internal buckles are fixed with limit protrusions. When the skeleton oil seal is installed, the limit protrusions abut against the upper surface of the skeleton oil seal to limit it. Even if the skeleton oil seal is in a suspended state inside the wheel hub motor, it can effectively reduce loosening or falling off caused by vibration or external force, thereby greatly reducing the risk of lubricating oil leakage, ensuring the stable operation of the wheel hub motor and improving its performance reliability.

[0027] 2. The inclined guide surface of the limiting protrusion guides the oil seal skeleton to be smoothly pressed into the oil seal stop surface along the inclined guide surface, which effectively reduces installation resistance and improves assembly efficiency;

[0028] 3. The inward elastic deformation simplifies the insertion and installation of the skeleton oil seal, and the elastic restoring force maintains a tight contact with the skeleton oil seal, effectively reducing the loosening or falling off of the skeleton oil seal, thereby improving the sealing performance and the reliability of the hub motor. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the external structure of an embodiment of this application.

[0030] Figure 2 This is an exploded view of the rubber cap and the skeleton oil seal, as well as a structural diagram of the skeleton oil seal being fitted onto the stator support.

[0031] Figure 3 This is a schematic diagram of the internal structure of an embodiment of this application.

[0032] Figure 4 This is a schematic diagram of the installation of the skeleton oil seal and the rubber cap.

[0033] Explanation of reference numerals in the attached drawings: 1. Rubber cap; 11. Oil seal face; 111. Mounting hole; 112. Abutment hole; 12. Annular boss; 13. Inner snap; 131. Limiting protrusion; 1311. Inclined guide surface; 14. Arc-shaped protrusion; 15. Inner snap groove; 17. Rounded corner; 2. Frame oil seal; 3. Stator bracket. Detailed Implementation

[0034] The following is in conjunction with the appendix Figure 1-3 This application will be described in further detail.

[0035] This application discloses an oil seal fixing structure for a hub motor frame. (Refer to...) Figure 1 , Figure 2 as well as Figure 3A hub motor frame oil seal fixing structure is provided, which acts on the frame oil seal 2 and is installed on the hub motor. The frame oil seal is used to be sleeved on the stator bracket 3. It includes a rubber cover 1, wherein an oil seal baffle 11 is provided on the inner side of the rubber cover 1, and the oil seal baffle 11 protrudes outward to form an annular boss 12. Several inner buckles 13 are vertically fixed on the edge of the oil seal baffle 11. In this embodiment, three inner buckles 13 are provided, which are evenly distributed on the edge of the oil seal baffle 11 along the contour direction of the oil seal baffle 11. Each of the three inner buckles 13 is fixedly provided with a limiting protrusion 131, and the protrusion direction of the limiting protrusion 131 is towards the inner side of the oil seal baffle 11.

[0036] This indicates that the inner side of the rubber cap 1 is provided with an oil seal baffle 11, which provides installation space for the skeleton oil seal 2. The oil seal baffle 11 forms an annular boss 12 facing the outer side of the rubber cap 1. The annular boss 12 serves as a direct force-bearing surface, effectively isolating external forces from directly acting on the skeleton oil seal 2 and reducing the occurrence of the skeleton oil seal 2 falling off due to external forces.

[0037] Furthermore, the gap between the inner wall of the annular boss 12 and the outer wall of the stator support 3 is less than 0.5mm, which effectively suppresses the displacement tendency of the skeleton oil seal 2 towards the stator support 3 when the cover is subjected to external force, reducing the sealing failure problem caused by deformation or displacement of the skeleton oil seal 2. This setting not only maintains a safe distance between the skeleton oil seal 2 and the end face of the stator support 3, reducing the leakage of lubricating oil due to sealing failure, but also reduces the abnormal contact between the skeleton oil seal 2 and the stator support 3, thereby reducing the operating friction loss and vibration noise, thus ensuring the stability of the internal lubrication system of the hub motor, and ultimately realizing the reliable operation and high-efficiency output of the hub motor under complex working conditions.

[0038] Reference Figure 4 Meanwhile, when the skeleton oil seal 2 is installed on the oil seal stop 11, the limiting protrusion 131 of the inner buckle 13 abuts against the upper surface of the skeleton oil seal 2, which axially limits the skeleton oil seal 2, reducing the loosening or falling off of the skeleton oil seal 2 due to vibration or external force. This solves the problem that even if the skeleton oil seal 2 is in a suspended state inside the wheel hub motor, it will not easily loosen or fall off when subjected to slight touch or external force, reducing the risk of lubricating oil leakage, thereby ensuring the normal operation and performance of the wheel hub motor.

[0039] Specifically, the rubber cover 1 has a circular outline to accommodate the installation requirements of the hub motor. The oil seal baffle 11 is located on the inner side of the rubber cover 1. The depth and width of the oil seal baffle 11 are determined according to the size of the skeleton oil seal 2. The bottom surface of the oil seal baffle 11 is flat and smooth to ensure a good fit with the skeleton oil seal 2.

[0040] Furthermore, the limiting protrusion 131 is fixedly mounted on the inner buckle 13. The limiting protrusion 131 has an irregular shape, and the surface of the limiting protrusion 131 is provided with an inclined guide surface 1311. The inclined guide surface 1311 is used to guide the installation between the skeleton oil seal 2 and the oil seal stop surface 11, and the inner buckle 13 has elastic deformation.

[0041] This demonstrates that the inclined guide surface 1311 allows the oil seal 2 to move smoothly along the inclined guide surface 1311 during the pressing process, reducing the additional resistance caused by direct collision or jamming. This simplifies the installation operation, improves installation efficiency, and ensures the smoothness and accuracy of the installation of the oil seal 2.

[0042] Meanwhile, the inner buckle 13 has elastic deformation. During installation, the inner buckle 13 can deform using its own elastic properties, making it easier for the skeleton oil seal 2 to be inserted into the oil seal stop 11. This elastic deformation not only simplifies the installation steps and reduces the installation difficulty, but also ensures a tight contact between the inner buckle 13 and the skeleton oil seal 2. After installation, the elastic restoring force of the inner buckle 13 helps to maintain the stability of the connection, reducing the possibility of the skeleton oil seal 2 loosening or falling off due to vibration or external force, thereby improving the sealing performance and the overall reliability of the hub motor.

[0043] In addition, the oil seal baffle 11 is provided with a number of arc-shaped protrusions 14 around its circumference. In this embodiment, three arc-shaped protrusions 14 are provided. The three arc-shaped protrusions 14 are vertically fixed to the edge of the oil seal baffle 11, forming a circular outline that matches the outer outline of the skeleton oil seal 2. The number of arc-shaped protrusions 14 are spaced apart to form an inner buckle groove 15. The inner buckle 13 is built into the inner buckle groove 15. The height and width of the arc-shaped protrusions 14 are adapted to the inner buckle 13. The inner buckle groove 15 provides a stable installation position for the inner buckle 13. The material of the arc-shaped protrusions 14 is the same as that of the rubber cap 1 to ensure the integrity of the arc-shaped protrusions and the rubber cap 1. At the same time, when the skeleton oil seal 2 is installed on the oil seal baffle 11, the side wall of the arc-shaped protrusions 14 abuts against the outer wall of the skeleton oil seal 2, further limiting the skeleton oil seal 2, reducing the axial movement of the skeleton oil seal 2, and improving the positioning accuracy and connection stability of the skeleton oil seal 2 installation.

[0044] Furthermore, an installation hole 111 is provided in the middle of the oil seal face 11. The installation hole 111 extends through the upper and lower surfaces of the oil seal face 11. The diameter of the installation hole 111 is determined according to the specific installation requirements of the hub motor. The shape of the installation hole 111 is circular. Through the installation hole 111, the rubber cover 1 and the skeleton oil seal 2 can be accurately positioned and fixed on the motor housing, reducing the deformation of the skeleton oil seal 2 or the decrease in sealing performance caused by installation errors.

[0045] Meanwhile, the groove wall of the oil seal baffle 11 is provided with a number of abutment holes 112. In this embodiment, there are three abutment holes 112. The three abutment holes 112 are located at the edge of the mounting hole 111 and are parallel to the inner buckle 13 in the horizontal direction. The three abutment holes 112 are arranged around the oil seal baffle 11 in a circumferential manner. The abutment holes 112 penetrate the upper and lower surfaces of the oil seal baffle 11. The abutment holes 112 provide a direct contact point between the external tool and the skeleton oil seal 2, so that when disassembling the skeleton oil seal 2, the external tool can abut against the skeleton oil seal 2 through these abutment holes 112, which simplifies the disassembly process and improves maintenance efficiency.

[0046] On the other hand, the outer edge of the rubber cap 1 and the inner edge of the oil seal baffle 11 are both provided with rounded corners 17. The rounded corners 17 on the outer edge of the rubber cap 1 eliminate the sharp edges of the rubber cap 1, which significantly reduces the risk of operators being scratched or cut when installing or removing the skeleton oil seal 2. It also allows operators to access the edge of the rubber cap 1 more comfortably and smoothly, thereby improving the convenience and efficiency of the installation process. The rounded corners 17 on the inner edge of the oil seal baffle 11 eliminate the sharp edges of the inner edge of the oil seal baffle 11, which effectively reduces the damage to the skeleton oil seal 2 caused by friction or collision with the groove wall of the oil seal baffle 11 during the installation process, and reduces the resistance during installation.

[0047] In addition, the rubber cap 1 is a one-piece molded design, which eliminates the assembly gaps and connection weaknesses of the split structure, significantly improves the structural strength and sealing reliability, and ensures the dimensional accuracy and positional consistency of each component, thereby optimizing the installation and positioning accuracy of the skeleton oil seal 2.

[0048] The implementation principle of the hub motor frame oil seal fixing structure in this application embodiment is as follows:

[0049] A hub motor frame oil seal fixing structure features an integrally molded rubber cap design. An oil seal baffle is provided on the inner side to fit the frame oil seal. Three evenly distributed inner buckles with inclined guide surfaces are vertically arranged along the edge of the oil seal baffle. The inner buckles achieve axial positioning by abutting against the upper surface of the frame oil seal through limiting protrusions. An installation hole in the center of the oil seal baffle ensures precise fixing of the rubber cap and the frame oil seal to the hub motor. Circumferentially arranged abutment holes are provided in the groove wall of the oil seal baffle to facilitate contact with the frame oil seal, further simplifying the disassembly process.

[0050] The skeleton oil seal is fitted onto the stator support. The gap between the inner wall of the annular boss and the outer wall of the stator support is less than 0.5mm. This effectively suppresses the displacement tendency of the skeleton oil seal towards the stator support when the cover is subjected to external force, reducing the sealing failure problem caused by deformation or displacement of the skeleton oil seal.

[0051] Meanwhile, the rounded corners of the outer edge of the rubber cap and the inner edge of the oil seal baffle optimize the safety and ease of installation for operators installing the skeleton oil seal, while the annular boss acts as a direct force-bearing surface to isolate external forces from the skeleton oil seal.

[0052] The coordinated action of each structure ensures sealing performance while reducing the risk of loosening or detachment of the skeleton oil seal due to vibration or external force. This solves the problem that even if the skeleton oil seal is suspended inside the hub motor and subjected to slight touch or external force, the skeleton oil seal will not easily loosen or detach, reducing the risk of lubricating oil leakage and thus ensuring the normal operation and performance of the hub motor.

[0053] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A hub motor frame oil seal fixing structure, acting on the frame oil seal (2), installed on the hub motor, the frame oil seal being used to be sleeved on the stator bracket (3), characterized in that, The device includes a rubber cap (1), an oil seal baffle (11) is provided on the inner side of the rubber cap (1), the oil seal baffle (11) protrudes outward toward the outer side of the rubber cap (1) to form an annular boss (12), the edge of the oil seal baffle (11) is provided with a plurality of inner buckles (13), the plurality of inner buckles (13) are vertically fixed to the edge of the oil seal baffle (11), the inner buckles (13) are provided with a limiting protrusion (131), the protrusion direction of the limiting protrusion (131) protrudes toward the inner side of the oil seal baffle (11), and the skeleton oil seal (2) is snapped into the oil seal baffle (11).

2. The hub motor frame oil seal fixing structure according to claim 1, characterized in that, The gap between the inner wall of the annular boss (12) and the outer wall of the stator bracket (3) is less than 0.5 mm.

3. The hub motor frame oil seal fixing structure according to claim 1, characterized in that, The limiting protrusion (131) is provided with an inclined guide surface (1311), which is used to guide the installation between the skeleton oil seal (2) and the oil seal stop surface (11).

4. The hub motor frame oil seal fixing structure according to claim 1, characterized in that, The inner buckle (13) has elastic deformation.

5. The hub motor frame oil seal fixing structure according to claim 1, characterized in that, The oil seal baffle (11) is provided with a plurality of arc-shaped protrusions (14) in the circumferential direction. The plurality of arc-shaped protrusions (14) are vertically fixed to the edge of the oil seal baffle (11). The plurality of arc-shaped protrusions (14) are spaced apart to form an inner buckle groove (15). The inner buckle (13) is built into the inner buckle groove (15).

6. The hub motor frame oil seal fixing structure according to claim 1, characterized in that, The oil seal baffle (11) has an installation hole (111) in the middle of the groove wall, and the installation hole (111) extends through the upper and lower surfaces of the oil seal baffle (11).

7. The hub motor frame oil seal fixing structure according to claim 1, characterized in that, The groove wall of the oil seal baffle is provided with a plurality of abutment holes (112), and the abutment holes (112) are arranged circumferentially along the contour direction of the oil seal baffle (11).

8. The hub motor frame oil seal fixing structure according to claim 1, characterized in that, The outer edge of the rubber cap (1) and the inner edge of the oil seal (11) are both provided with rounded corners (17).

9. The hub motor frame oil seal fixing structure according to claim 1, characterized in that, The cap (1) is integrally molded.

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