Inner buckle connection oil pump sealing tail cover and electronic oil pump

Abstract

The invention provides an inner buckle connection oil pump sealing tail cover and an electronic oil pump, the inner buckle connection oil pump sealing tail cover comprises a tail cover body and a sealing ring, the tail cover body is provided with a clamping jaw, the clamping jaw is arranged on the end edge of the tail cover body, and the clamping jaw extends in the axial direction of the tail cover body; the multiple clamping jaws are distributed in the circumferential direction of the tail cover body at intervals, and a receding groove is formed between every two adjacent clamping jaws. The sealing ring is arranged on the periphery of the tail cover body and surrounds the tail cover body. Through the improvement of the structure, when the tail of the electronic oil pump is sealed, the clamping step is arranged on the inner side of the electronic oil pump, and during installation, the clamping jaw only needs to face the interior of the electronic oil pump, the tail cover body is pressed, and the clamping jaw stretches into the interior of the electronic oil pump till the clamping jaw is clamped to the clamping step; the installation process is simple and convenient, and the installation efficiency can be improved.

Description

Technical Field

[0001] This invention relates to the field of oil pump sealing technology, specifically to an internal snap-fit ​​oil pump sealing tail cap and an electronic oil pump. Background Technology

[0002] Electronic oil pumps are simple in structure and easy to control, so they are widely used in automotive oil delivery, cooling, lubrication and other systems.

[0003] An electronic oil pump consists of a pumping section and a motor section, with the housings of both sections integrally molded. The pumping section is mounted on one end of the motor's output shaft, while the motor shaft and rotor are installed within the housing and sealed by a sealing tail cover, which serves to prevent water and dust damage. In existing designs, the tail cover is often installed and sealed using screw fasteners. During installation, the screw torque needs to be controlled. If the torque on the screw is too high, it can easily lead to screw breakage and warping of the tail cover between adjacent screws, resulting in decreased sealing performance. If the torque is too low, the bolts can easily come loose during use, causing the tail cover to detach. Therefore, using a bolt-based structure is not only prone to failure but also involves numerous assembly steps, making the process cumbersome and significantly impacting construction efficiency, directly increasing production costs.

[0004] In summary, there is an urgent need for an internal snap-fit ​​connection between the oil pump sealing cap and the electronic oil pump to solve or at least partially solve the problems existing in the prior art. Summary of the Invention

[0005] The purpose of this invention is to provide an internal snap-fit ​​oil pump sealing tail cap, aiming to solve the technical problem that existing oil pump sealing tail caps have long installation times, affecting the installation and production speed. The specific technical solution is as follows:

[0006] An internal snap-fit ​​oil pump sealing tail cover includes a tail cover body and a sealing ring. The tail cover body is provided with claws, which are arranged at the end edge of the tail cover body and extend axially along the tail cover body. Multiple claws are provided and are distributed circumferentially along the tail cover body, forming a clearance groove between adjacent claws. The sealing ring is arranged on the outer periphery of the tail cover body and surrounds the tail cover body.

[0007] Furthermore, the claw includes a flexible claw arm and a claw tongue. The first end of the flexible claw arm is fixedly connected to the tail cover body, and the second end of the flexible claw arm is used to fixally connect the claw tongue. The claw tongue extends in a direction away from the middle of the tail cover body.

[0008] Furthermore, an annular groove is provided on the tail cover body, and the annular groove is arranged around the tail cover body; the sealing ring is partially embedded in the annular groove.

[0009] Furthermore, the sealing ring is an O-ring, which is partially embedded in an annular groove.

[0010] Furthermore, the sealing ring is made of one of the following materials: rubber, silicone, or polyurethane.

[0011] Furthermore, the axial end cross-section of the tail cover body is arranged in one of the following shapes: circular, elliptical, or regular polygonal.

[0012] Furthermore, it also includes a stop boss, which is arranged around the outer periphery of the tail cover body and is fixedly connected to the tail cover body.

[0013] Furthermore, it also includes an elastic sealing gasket, which is sleeved on the outer periphery of the tail cover body and arranged between the stop boss and the annular sealing ring, with the end of the elastic sealing gasket away from the annular sealing ring abutting against the stop boss.

[0014] The application of the technical solution of the present invention has the following beneficial effects:

[0015] With the above structural improvements, when sealing the tail of the electronic oil pump, a snap-fit ​​step is set inside the electronic oil pump. During installation, simply face the snap-fit ​​claws towards the inside of the electronic oil pump and press the tail cover body to allow the snap-fit ​​claws to extend into the electronic oil pump until they snap onto the snap-fit ​​step. This completes the installation of the tail cover body. The installation process is simple and convenient, and can improve installation efficiency.

[0016] On the other hand, this application also provides an electronic oil pump, including a housing, a pumping section, and a motor section, and also includes the aforementioned internal snap-fit ​​oil pump sealing tail cover. The pumping section and the motor section are both installed inside the housing, and the pumping section is arranged at the output end of the motor section, with the output end of the motor section connected to the pumping section. A receiving groove is provided on the housing, and the motor section is installed in the receiving groove. A snap-fit ​​step is provided on the inner wall of one end of the housing opening, and the snap-fit ​​claw of the internal snap-fit ​​oil pump sealing tail cover is engaged with the snap-fit ​​step. The first side of the sealing ring abuts against the inner wall of the receiving groove, and the second side of the sealing ring abuts against the outer wall of the tail cover body.

[0017] Furthermore, the internal snap-fit ​​connection oil pump sealing tail cover also includes a stop boss and an elastic sealing gasket. The stop boss is located on the outer periphery of the tail cover body and is arranged around the tail cover body. The elastic sealing gasket is arranged around the outer periphery of the tail cover body. When the tail cover body is in the closed state, the elastic sealing gasket is compressed and clamped between the housing and the stop boss.

[0018] Furthermore, a first inclined surface is provided at the end of the claw tongue near the elastic claw arm, and a second inclined surface is provided at the end of the locking step away from the opening of the receiving groove. When the tail cover body is in the closed state, the first inclined surface and the second inclined surface abut and cooperate, and the direction of the force of the second inclined surface acting on the first inclined surface is towards the inside of the receiving groove.

[0019] Furthermore, the tail cover body is provided with a guide slope to facilitate the disassembly of the tail cover body. The guide slope is provided on the open end face of the receiving groove. The guide slope extends from the outside of the open end face of the receiving groove toward the inside of the open end face of the receiving groove, and the guide slope does not penetrate through the open end face of the receiving groove.

[0020] The application of the technical solution of the present invention has the following beneficial effects:

[0021] With the above structural design, the installation process can be completed simply by pressing the tail cap body, making the entire installation process simpler and more efficient. While ensuring performance, the structure is simplified and production efficiency is improved.

[0022] In addition to the objectives, features, and advantages described above, the present invention has other objectives, features, and advantages. These will be described below with reference to... Figures 1-8 The present invention will be described in further detail below. Attached Figure Description

[0023] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0024] Figure 1 This is a schematic diagram of the overall structure of an internal snap-fit ​​connection oil pump sealing tail cap according to Embodiment 1 of the present invention;

[0025] Figure 2 This is an exploded view of an internal snap-fit ​​connection oil pump sealing tail cap according to Embodiment 1 of the present invention;

[0026] Figure 3 This is a cross-sectional view of an exploded view of an oil pump sealing tail cap with an internal snap-fit ​​connection according to Embodiment 1 of the present invention;

[0027] Figure 4 yes Figure 3 Enlarged view at point A in the middle;

[0028] Figure 5 This is a schematic diagram of the overall structure of an electronic oil pump according to Embodiment 2 of the present invention;

[0029] Figure 6 This is a schematic diagram of the internal structure of an electronic oil pump according to Embodiment 2 of the present invention;

[0030] Figure 7 yes Figure 6 Enlarged view at point B;

[0031] Figure 8 This is a schematic diagram of the internal structure of an electronic oil pump in Embodiment 2 of the present invention, shown in an exploded view.

[0032] The components include: 1. Tail cover body; 11. Claw; 111. Elastic claw arm; 112. Claw tongue; 1121. First inclined surface; 12. Relief groove; 13. Annular groove; 14. Guide inclined surface; 2. Sealing ring; 3. Stopping boss; 4. Elastic sealing gasket; 5. Housing; 51. Receiving groove; 52. Snap-fit ​​step; 521. Second inclined surface; 6. Pumping unit; 7. Motor unit. Detailed Implementation

[0033] To facilitate understanding of the present invention, a more complete description is provided below, along with preferred embodiments. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a thorough and complete understanding of the disclosure of the present invention.

[0034] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

[0035] Example 1:

[0036] See Figures 1-4 This embodiment provides an internal snap-fit ​​oil pump sealing tail cover, including a tail cover body 1 and a sealing ring 2. The tail cover body 1 is provided with a claw 11, which is arranged at the end edge of the tail cover body 1 and extends axially along the tail cover body 1. Multiple claws 11 are provided and are distributed circumferentially along the tail cover body 1, and a clearance groove 12 is formed between two adjacent claws 11. The sealing ring 2 is arranged on the outer periphery of the tail cover body 1 and surrounds the tail cover body 1.

[0037] It should be noted that the aforementioned sealing cap is generally used for sealing cavities, such as sealing the tail of an electronic oil pump. Existing designs typically employ an end cap and bolt structure. This involves drilling a through hole in the end cap and a threaded hole in the pump body, then threading a screw through the through hole in the end cap onto the pump body to lock the end cap in place, thus sealing the pump. However, this structure is cumbersome to install, relatively complex, and has high manufacturing costs. The improved design, however, allows for sealing the tail of the electronic oil pump by incorporating a snap-fit ​​step 52 inside the pump. During installation, simply align the clip 11 towards the inside of the pump and press the tail cap body 1, allowing the clip 11 to extend into the pump until it engages with the snap-fit ​​step 52. This simplifies the installation process and improves efficiency. Furthermore, the tail cap body 1 and clip 11 are manufactured using injection molding, resulting in lower production costs and significantly reducing manufacturing expenses. When the claw 11 is inserted into the electronic oil pump and before the claw 11 is engaged with the engagement step 52, the claw 11 will deform toward the electronic oil pump. The setting of the clearance groove 12 allows the deformation to proceed normally, preventing interference between two adjacent claws 11 due to deformation, which would prevent the tail cover body 1 from being successfully installed on the electronic oil pump.

[0038] Furthermore, the claw 11 includes an elastic claw arm 111 and a claw tongue 112. The first end of the elastic claw arm 111 is fixedly connected to the tail cover body 1, and the second end of the elastic claw arm 111 is used to fixally connect the claw tongue 112. The claw tongue 112 extends in a direction away from the middle of the tail cover body 1.

[0039] It is known that when the claw tongue 112 engages, it provides engagement force, and the elastic claw arm 111 provides elastic force to the claw tongue 112 to prevent the claw tongue 112 from changing position after engagement, which would result in an unreliable engagement.

[0040] Furthermore, an annular groove 13 is provided on the tail cover body 1, and the annular groove 13 is arranged around the tail cover body 1; the sealing ring 2 is partially embedded in the annular groove 13.

[0041] It is understood that the sealing ring 2 is embedded in the annular groove 13 by the arrangement of the annular groove 13. The sealing ring 2 is positioned by the two side walls and the bottom wall of the annular groove 13 to prevent the sealing ring 2 from changing position during use and thus failing to achieve a seal.

[0042] Furthermore, the sealing ring 2 is an O-ring, which is partially embedded in the annular groove 13.

[0043] The O-ring is embedded in the annular groove 13 to prevent it from loosening during use. In addition, the O-ring abuts against external components to achieve a seal.

[0044] Furthermore, the sealing ring 2 is made of one of the following materials: rubber, silicone, or polyurethane.

[0045] Rubber, silicone, and polyurethane all have good elasticity. During sealing, they deform and come into contact with external parts to achieve a seal.

[0046] Furthermore, the axial end cross-section of the tail cover body 1 is arranged as one of a circle, an ellipse, or a regular polygon.

[0047] The cross-sectional shape of the receiving groove 51 is arranged to match the shape of the tail cap body 1. Of course, when the tail cap body 1 is circular, the processing and manufacturing are relatively simple and the processing cost is lower.

[0048] Furthermore, it also includes a stop boss 3, which is arranged around the outer periphery of the tail cover body 1 and is fixedly connected to the tail cover body 1.

[0049] It can be seen that the tail cover body 1 is limited by the stop boss 3 to prevent the tail cover body 1 from moving into the receiving groove 51.

[0050] Furthermore, it also includes an elastic sealing gasket 4, which is sleeved on the outer periphery of the tail cover body 1 and is arranged between the stop boss 3 and the annular sealing ring 2. The end of the elastic sealing gasket 4 away from the annular sealing ring 2 abuts against the stop boss 3.

[0051] It is known that the first seal is achieved by the contact between the elastic pad and the external parts, which works together with the sealing ring 2 to improve the sealing performance. In addition, the compressibility of the elastic pad allows the claw tongue 112 to extend a longer distance into the electronic oil pump when the tail cover body 1 is installed, so that the claw tongue 112 can be locked smoothly. After locking, the elastic force of the sealing pad is applied to the claw tongue 112, so that the claw tongue 112 can remain in the locked state.

[0052] Example 2:

[0053] See Figures 5-8This application also provides an electronic oil pump, including a housing 5, a pumping section 6, and a motor section 7, and also includes the aforementioned internal snap-fit ​​oil pump sealing tail cover. The pumping section 6 and the motor section 7 are both installed inside the housing 5, and the pumping section 6 is arranged at the output end of the motor section 7, and the output end of the motor section 7 is connected to the pumping section 6. A receiving groove 51 is provided on the housing 5, and the motor section 7 is installed in the receiving groove 51. A snap-fit ​​step 52 is provided on the inner wall of one end of the housing 5 opening. The snap-fit ​​claw 11 of the internal snap-fit ​​oil pump sealing tail cover is engaged with the snap-fit ​​step 52. The first side of the sealing ring 2 abuts against the inner wall of the receiving groove 51, and the second side of the sealing ring 2 abuts against the outer wall of the tail cover body 1. Specifically, the pumping unit 6 is arranged as a gear pump, which is provided with an oil suction port and a pumping port. The motor unit 7 includes a motor stator and a motor rotor. The motor stator is fixedly connected in the receiving groove 51, and the motor rotor is coaxially rotatably connected in the receiving groove 51. The motor rotor is provided with a power output shaft, which is connected to the input end of the gear pump to drive the gear pump. It should be noted that the pumping unit 6 can also be a vane pump or a plunger pump. It should also be noted that the end of the claw tongue 112 away from the elastic claw arm 111 is provided with a pressing slope. By applying pressure to the pressing slope, the elastic claw arm can be deformed.

[0054] It is known that during installation, the claw 11 end of the inner snap-fit ​​connection oil pump sealing tail cover is oriented towards the receiving groove 51, and the tail cover body 1 is pressed towards the receiving groove 51, so that the pressing inclined surface on the claw tongue 112 abuts against the groove opening of the receiving groove 51. The tail cover body 1 is pressed further, and the claw tongue 112 and the elastic claw arm 111 deform under the reaction force of the inner wall of the receiving groove 51, so that the elastic claw arm 111 deforms towards the receiving groove 51, and the claw tongue 112 and the elastic claw arm 111 extend into the receiving groove 51. The tail cover body 1 is pressed further until the claw tongue 112 crosses the snap-fit ​​step 52. At this time, the claw tongue 112 snaps onto the snap-fit ​​step 52 to prevent the tail cover body 1 from loosening during use. After the cover is closed, the inner side of the sealing ring 2 abuts against the tail cover body 1 to seal, and the outer side of the sealing ring 2 abuts against the inner wall of the receiving groove 51 to seal, thereby preventing external mud and water from entering the receiving cavity. Furthermore, thanks to the above structural design, installation can be completed simply by pressing the tail cap body 1, making the entire installation process simpler and more efficient. This simplifies the structure while maintaining performance and improving production efficiency. The tail cap body 1 is made of plastic and manufactured using injection molding, which saves on material and processing costs compared to using aluminum alloy.

[0055] It should be noted that the locking engagement of the claw tongue 112 and the locking step 52 is only effective in preventing the tail cover body 1 from coming out of the receiving groove 51, but it is less effective in preventing the tail cover body 1 from entering the receiving groove 51. It relies solely on the static friction between the tail cover body 1 and the inner wall of the receiving groove 51 to prevent the tail cover body 1 from moving into the receiving groove 51.

[0056] Furthermore, the internal snap-fit ​​connection oil pump sealing tail cover also includes a stop boss 3 and an elastic sealing gasket 4. The stop boss 3 is located on the outer periphery of the tail cover body 1 and is arranged around the tail cover body 1. The elastic sealing gasket 4 is arranged around the outer periphery of the tail cover body 1. When the tail cover body 1 is in the closed state, the elastic sealing gasket 4 is compressed and clamped between the housing 5 and the stop boss 3. Specifically, when the tail cover body 1 is in the open state, the gap between the claw tongue 112 and the stop boss 3 is less than the sum of the distance between the stop step and the end face of the receiving groove 51 and the thickness of the elastic sealing gasket 4. This is so that when the tail cover body 1 is in the closed state, the stop step and the elastic sealing gasket 4 need to be embedded in the gap between the claw tongue 112 and the stop boss 3, thereby compressing the elastic sealing gasket 4 to achieve the purpose of sealing between the end face of the housing 5 and the tail cover body 1.

[0057] It can be seen that the tail cover body 1 is limited by the stop boss 3 to prevent the tail cover body 1 from being completely inserted into the receiving groove 51 after installation. At the same time, the tail cover body 1 is limited by the claw tongue 112 to prevent the tail cover body 1 from being detached from the housing 5 after installation. The tail cover body 1 is limited by the claw tongue 112 and the stop boss 3. The elastic sealing gasket 4 is an annular sealing gasket. When the tail cover body 1 is closed on the housing 5, the elastic sealing gasket 4 is in a compressed state. On the one hand, the elastic sealing gasket 4 achieves the first seal between the housing 5 and the tail cover body 1, and works together with the second seal formed by the sealing ring 2 and the inner wall of the receiving groove 51 to further improve the sealing performance between the tail cover body 1 and the housing 5. On the other hand, the compressed elastic sealing gasket 4 applies an elastic force to the tail cover body 1 away from the housing 5, so that the first inclined surface 1121 and the second inclined surface 521 on the claw tongue 112 are tightly abutted, thereby restricting the axial movement of the tail cover body 1 and improving the connection stability between the tail cover body 1 and the housing 5.

[0058] Furthermore, the claw tongue 112 is provided with a first inclined surface 1121 at one end near the elastic claw arm 111, and the locking step 52 is provided with a second inclined surface 521 at the end away from the opening of the receiving groove 51. When the tail cover body 1 is in the closed state, the first inclined surface 1121 and the second inclined surface 521 abut against each other, and the direction of the force of the second inclined surface 521 acting on the first inclined surface 1121 is towards the inside of the receiving groove 51.

[0059] Understandably, when the tail cover body 1 is in the closed state, the elastic claw arm 111 is in a deformed state. The elastic claw arm 111 provides elastic force to the claw tongue 112, so that the first inclined surface 1121 on the claw tongue 112 abuts against the second inclined surface 521 on the locking step 52. At this time, the reaction force of the second inclined surface 521 on the first inclined surface 1121 is directed toward the receiving groove 51. This force can be decomposed into a first component force along the axial direction of the tail cover body 1 and toward the motor part 7, and into a second component force along the radial direction of the tail cover body 1 and toward the inside of the tail cover body 1. The first component force makes the tail cover body 1 firmly connected to the housing 5 and compresses the elastic sealing gasket 4. The second component force is used to balance the elastic force when the elastic claw arm 111 is deformed. When it is necessary to disassemble the tail cover body 1, an external force is applied to the tail cover in a direction away from the electric motor. This external force overcomes the first component force and increases the second component force, thereby pushing the claw tongue 112 towards the inside of the receiving groove 51. This causes the elastic claw arm 111 to undergo elastic deformation towards the receiving groove 51 until the first inclined surface 1121 and the second inclined surface 521 are completely misaligned, allowing the tail cover body 1 to be removed from the receiving groove 51. Through the design of the above structure, the tail cover body 1 can be disassembled without damaging the claw tongue 112. It should be noted that if the force of the second inclined surface 521 acting on the first inclined surface 1121 is directed towards the outside of the receiving groove 51, then when an external force is applied to the tail cover body 1 in a direction away from the electric motor, the force on the claw tongue 112 is in a direction away from the receiving groove 51. This causes the claw tongue 112 to move in a direction away from the receiving groove 51, ultimately leading to the separation of the claw tongue 112 from the elastic claw arm 111, resulting in damage to the claw tongue 112.

[0060] Furthermore, the tail cover body 1 is provided with a guide slope 14 to facilitate the disassembly of the tail cover body 1. The guide slope 14 is provided on the open end face of the receiving groove 51. The guide slope 14 extends from the outside of the open end face of the receiving groove 51 toward the inside of the open end face of the receiving groove 51, and the guide slope 14 is not provided through the open end face of the receiving groove 51.

[0061] It is understood that when disassembling the tail cover body 1, an external force needs to be applied to the tail cover body 1 in a direction away from the motor unit 7. Due to the guide ramp 14, a disassembly tool is inserted along the guide ramp 14. For example, a flathead screwdriver is inserted from the guide ramp 14. At this time, one side of the flathead screwdriver abuts against the guide ramp 14, and the other side abuts against the elastic sealing gasket 4. The flathead screwdriver then applies a force to the elastic sealing gasket 4 in a direction away from the housing 5, thereby causing the tail cover body 1 to move in a direction away from the housing 5. The guide ramp 14 facilitates the disassembly of the tail cover body 1.

[0062] It should be noted that the opening end face of the receiving groove 51 is an annular surface. When the tail cap body 1 is in the closed state, the annular elastic sealing gasket 4 abuts against this annular sealing surface to achieve the first-level annular seal. If the guide slope 14 is installed through the opening end of the receiving groove 51, it will cause external sewage to break through the first-level annular seal and enter the interior of the first-level annular seal. Therefore, the guide slope 14 should not be installed through the opening end face of the receiving groove 51.

[0063] The working principle and basic operation process of this invention are as follows:

[0064] During installation, the claw 11 end of the inner snap-fit ​​connection to the oil pump sealing tail cover is oriented towards the receiving groove 51, and the tail cover body 1 is pressed towards the receiving groove 51, so that the pressing bevel on the claw tongue 112 abuts against the groove opening of the receiving groove 51. Continue pressing the tail cover body 1; the claw tongue 112 and the elastic claw arm 111 deform under the reaction force of the inner wall of the receiving groove 51, causing the elastic claw arm 111 to deform towards the receiving groove 51, allowing the claw tongue 112 and the elastic claw arm 111 to extend into the receiving groove 51. Continue pressing the tail cover body 1... The elastic sealing gasket 4 contacts the end face of the tail cap body 1, and as the tail cap body 1 continues to move, the elastic sealing gasket 4 is compressed until the claw tongue 112 crosses the locking step 52. At this time, the elastic claw arm 111 returns to its elastic deformation, and the claw tongue 112 locks onto the locking step 52. The pressing force on the tail cap body 1 is removed, and the tail cap body 1 moves back under the elastic force of the elastic sealing element until the claw tongue 112 abuts against the locking step 52. At this time, the tail cap body 1 is limited, and the installation of the tail cap body 1 is completed. After installation, the elastic sealing gasket 4 is still in a compressed state, forming the first seal, and the sealing ring 2 forms the second seal, further improving the waterproof and dustproof performance.

[0065] The remaining aspects are basically the same as in Example 1, and will not be repeated here.

[0066] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A sealing tail cap for an oil pump with an internal snap-fit ​​connection, characterized in that: Includes a tail cover body (1) and a sealing ring (2). The tail cover body (1) is provided with a claw (11). The claw (11) is arranged at the end edge of the tail cover body (1) and extends along the axial direction of the tail cover body (1). Multiple claws (11) are provided, and the multiple claws (11) are distributed circumferentially along the tail cover body (1), and a clearance groove (12) is formed between two adjacent claws (11); The sealing ring (2) is arranged on the outer periphery of the tail cap body (1), and the sealing ring (2) is arranged around the tail cap body (1).

2. The internal snap-fit ​​connection oil pump sealing tail cap according to claim 1, characterized in that: The claw (11) includes an elastic claw arm (111) and a claw tongue (112). The first end of the elastic claw arm (111) is fixedly connected to the tail cover body (1), and the second end of the elastic claw arm (111) is used to fixally connect the claw tongue (112). The claw tongue (112) extends in a direction away from the middle of the tail cover body (1).

3. The internal snap-fit ​​connection oil pump sealing tail cap according to claim 1, characterized in that: The tail cap body (1) is provided with an annular groove (13), which is arranged around the tail cap body (1); The sealing ring (2) is partially embedded in the annular groove (13).

4. The internal snap-fit ​​connection oil pump sealing tail cap according to claim 1, characterized in that: The axial end cross-section of the tail cover body (1) is arranged in one of the following shapes: circular, elliptical, or regular polygonal.

5. A snap-fit ​​oil pump sealing tail cap according to any one of claims 1-4, characterized in that: It also includes a stop boss (3), which is arranged around the outer periphery of the tail cover body (1) and is fixedly connected to the tail cover body (1).

6. The internal snap-fit ​​connection oil pump sealing tail cap according to claim 5, characterized in that: It also includes an elastic sealing gasket (4), which is sleeved on the outer periphery of the tail cover body (1) and is arranged between the stop boss (3) and the annular sealing ring (2). One end of the elastic sealing gasket (4) away from the annular sealing ring (2) abuts against the stop boss (3).

7. An electronic oil pump, characterized in that: It includes a housing (5), a pumping section (6) and a motor section (7), and also includes the internal snap-fit ​​oil pump sealing tail cover as described in claim 2. The pumping section (6) and the motor section (7) are both installed inside the housing (5), and the pumping section (6) is arranged at the output end of the motor section (7). The output end of the motor section (7) is connected to the pumping section (6). The housing (5) is provided with a receiving groove (51), the motor part (7) is installed in the receiving groove (51), and a snap-fit ​​step (52) is provided on the inner wall of the opening end of the housing (5). The claw (11) of the inner snap-fit ​​connection oil pump sealing tail cover is engaged with the snap-fit ​​step (52). The first side of the sealing ring (2) abuts against the inner wall of the receiving groove (51), and the second side of the sealing ring (2) abuts against the outer wall of the tail cap body (1).

8. An electronic oil pump according to claim 7, characterized in that: The inner snap-fit ​​connection oil pump sealing tail cover also includes a stop boss (3) and an elastic sealing gasket (4). The stop boss (3) is disposed on the outer periphery of the tail cover body (1) and the stop boss (3) is arranged around the tail cover body (1). The elastic sealing gasket (4) is arranged around the outer periphery of the tail cap body (1); Furthermore, when the tail cover body (1) is in the closed state, the elastic sealing gasket (4) is compressed and clamped between the housing (5) and the stop boss (3).

9. An electronic oil pump according to claim 8, characterized in that: The claw tongue (112) is provided with a first inclined surface (1121) at one end near the elastic claw arm (111), and the snap-fit ​​step (52) is provided with a second inclined surface (521) at one end away from the opening of the receiving groove (51). When the tail cover body (1) is in the closed state, the first inclined surface (1121) and the second inclined surface (521) abut against each other, and the direction of the force of the second inclined surface (521) acting on the first inclined surface (1121) is towards the inside of the receiving groove (51).

10. An electronic oil pump according to claim 9, characterized in that: The tail cap body (1) is provided with a guide slope (14) to facilitate the disassembly of the tail cap body (1). The guide slope (14) is provided on the opening end face of the receiving groove (51). The guide slope (14) extends from the outside of the opening end face of the receiving groove (51) toward the inside of the opening end face of the receiving groove (51), and the guide slope (14) does not penetrate the opening end face of the receiving groove (51).

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