Electronic oil pump shell with oil seal thrust groove and electronic oil pump

Abstract

The utility model provides an electronic oil pump shell with an oil seal thrust groove and an electronic oil pump, an oil pump inner cavity, a motor inner cavity and an oil seal installation cavity are arranged on the shell, and the oil seal installation cavity is arranged between the oil pump inner cavity and the motor inner cavity and simultaneously communicated with the oil pump inner cavity and the motor inner cavity. An oil seal thrust groove is formed in the circumferential wall face of the oil seal installation cavity. The oil seal thrust groove is arranged, so that the problems of oil seal damage and sealing failure caused by the fact that the oil seal in the electronic oil pump is easily influenced by high-pressure severe working conditions and is extruded out of the oil seal mounting cavity can be solved.

Description

Technical Field

[0001] This utility model relates to the field of electronic oil pump technology, specifically to an electronic oil pump housing with an oil seal thrust groove and an electronic oil pump. Background Technology

[0002] With the rapid development of the automotive industry, and as vehicle performance moves towards greater safety, reliability, stability, full automation, intelligence, and environmental protection and energy conservation, electronic oil pumps are widely used in automotive lubrication and cooling systems, and can well meet market demands.

[0003] Oil seals used in electronic oil pumps to seal the inner and outer rotors and the motor cavity are susceptible to damage from high-pressure and harsh operating conditions. They can be squeezed out of the mounting cavity, causing damage and sealing failure. Furthermore, the limited installation space restricts the installation of oil seals; some seals designed for high-pressure and harsh conditions cannot be installed, while others that can fit in confined spaces cannot meet the requirements.

[0004] In summary, there is an urgent need for an electronic oil pump housing with an oil seal thrust groove and an electronic oil pump to solve the problems existing in the prior art. Utility Model Content

[0005] The purpose of this utility model is to provide an electronic oil pump housing with an oil seal thrust groove, aiming to solve the problem that the oil seal in the electronic oil pump is easily squeezed out of the oil seal mounting cavity under high pressure and harsh working conditions, causing oil seal damage and sealing failure. The specific technical solution is as follows:

[0006] An electronic oil pump housing with an oil seal thrust groove is provided. The housing has an oil pump inner cavity, a motor inner cavity and an oil seal mounting cavity. The oil seal mounting cavity is located between the oil pump inner cavity and the motor inner cavity and simultaneously connects the oil pump inner cavity and the motor inner cavity. The circumferential wall surface of the oil seal mounting cavity is provided with an oil seal thrust groove.

[0007] Preferably, the number of oil seal thrust grooves is N, and the N oil seal thrust grooves are arranged along the axial direction of the oil seal mounting cavity, where N is a natural number greater than or equal to 2.

[0008] Preferably, the cross-sectional shape of the oil seal thrust groove is one of the following: triangular, rectangular, semi-circular, trapezoidal, and semi-teardrop.

[0009] This utility model also provides an electronic oil pump, including a motor stator assembly, a motor rotor assembly, an oil pump rotor assembly, a pump cover, an oil seal, and the aforementioned housing. The motor stator assembly and the motor rotor assembly are disposed in the inner cavity of the motor. The oil pump rotor assembly is disposed in the inner cavity of the oil pump, and the side of the inner cavity of the oil pump away from the inner cavity of the motor is sealed by the pump cover. The output shaft of the motor rotor assembly passes through the oil seal mounting cavity and is connected to the oil pump rotor assembly. The oil seal is sleeved on the output shaft and disposed in the oil seal mounting cavity.

[0010] Preferably, the housing is further provided with a front end mounting cavity, which is located on the side of the oil seal mounting cavity away from the oil pump cavity. The front end mounting cavity connects the oil seal mounting cavity and the motor cavity, and is used to install the bearing at the front end of the output shaft of the motor rotor assembly.

[0011] Preferably, the device further includes a controller mounting assembly. The housing is also provided with a rear mounting cavity, which is located on the side of the motor cavity away from the oil pump cavity and communicates with the motor cavity. The controller mounting assembly is fixedly located on the side of the rear mounting cavity away from the motor cavity, and the bearing at the rear end of the output shaft of the motor rotor assembly is mounted on the controller mounting assembly.

[0012] Preferably, the controller mounting assembly includes a controller mounting end cover and a tail cover. The controller mounting end cover is fixedly disposed on the side of the rear mounting cavity away from the motor cavity. The tail cover is disposed on the controller mounting end cover, and the two form a controller mounting cavity. The bearing at the rear end of the output shaft of the motor rotor assembly is mounted on the controller mounting end cover.

[0013] Preferably, the tail cap is provided with a waterproof and breathable valve, which enables the controller mounting cavity to communicate with the outside.

[0014] Preferably, a sealing ring is provided between the controller mounting end cover and the tail cover, as well as between the controller mounting end cover and the housing.

[0015] Preferably, the pump cover is provided with an inlet and an outlet, and both the inlet and outlet are provided with oil port sealing rings.

[0016] The application of the technical solution of this utility model has the following beneficial effects:

[0017] Because the circumferential wall of the oil seal mounting cavity is provided with an oil seal thrust groove, when the electronic oil pump operates under high pressure and harsh conditions, the high-pressure oil in the pump cavity will squeeze the inner wall of the oil seal through the inside of the oil seal, causing the outer wall of the oil seal to deform and bulge into the oil seal thrust groove. This can increase the adhesion of the oil seal and prevent the oil seal from being squeezed out of the oil seal mounting cavity, thus avoiding the problem of oil seal damage and sealing failure.

[0018] In addition to the objectives, features, and advantages described above, this utility model has other objectives, features, and advantages. The present utility model will now be described in further detail with reference to the figures. Attached Figure Description

[0019] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings:

[0020] Figure 1 This is a cross-sectional view of an electronic oil pump;

[0021] Figure 2 yes Figure 1 Schematic diagram of the middle shell structure;

[0022] Figure 3 yes Figure 1 A magnified view of a portion of the thrust groove at the CNPC seal;

[0023] Figure 4 This is a schematic diagram of a structure where the cross-sectional shape of the thrust groove of an oil seal is rectangular;

[0024] Figure 5 This is a schematic diagram of a structure where the cross-sectional shape of the oil seal thrust groove is semi-teardrop-shaped;

[0025] Figure 6 This is a schematic diagram of a structure where the cross-sectional shape of the oil seal thrust groove is trapezoidal;

[0026] Figure 7 This is a schematic diagram of a structure where the cross-sectional shape of the oil seal thrust groove is semi-circular;

[0027] The components are as follows: 1. Tail cover; 2. Controller mounting end cover; 3. Housing; 31. Oil seal thrust groove; 32. Oil pump inner cavity; 33. Motor inner cavity; 34. Oil seal mounting cavity; 35. Front mounting cavity; 36. Rear mounting cavity; 4. Motor stator assembly; 5. Motor rotor assembly; 6. Oil pump rotor assembly; 61. Inner rotor; 62. Outer rotor; 7. Pump cover; 8. Waterproof and breathable valve; 9. End cover sealing ring; 10. Housing rear sealing ring; 11. Housing front sealing ring; 12. Wave gasket; 13. Oil seal; 131. Oil seal outer wall; 132. Oil seal inner wall; 14. Oil port sealing ring. Detailed Implementation

[0028] To facilitate understanding of this invention, a more comprehensive description is provided below, along with preferred embodiments. However, this 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 more thorough and complete understanding of the disclosure of this invention.

[0029] 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 is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

[0030] Example:

[0031] See Figures 1-3 This embodiment provides an electronic oil pump with an oil seal thrust groove in the housing, including a motor stator assembly 4, a motor rotor assembly 5, an oil pump rotor assembly 6, a pump cover 7, an oil seal 13, and a housing 3. The housing 3 is provided with an oil seal thrust groove 31. Specifically, the housing 3 is provided with an oil pump inner cavity 32, a motor inner cavity 33, and an oil seal mounting cavity 34. The oil seal mounting cavity 34 is located between the oil pump inner cavity 32 and the motor inner cavity 33 and simultaneously connects the oil pump inner cavity 32 and the motor inner cavity 33. The circumferential wall surface of the oil seal mounting cavity 34 is provided with an oil seal thrust groove 31.

[0032] Furthermore, the motor stator assembly 4 and the motor rotor assembly 5 are disposed in the motor cavity 33, the oil pump rotor assembly 6 is disposed in the oil pump cavity 32, and the side of the oil pump cavity 32 away from the motor cavity 33 is sealed by the pump cover 7; the output shaft of the motor rotor assembly 5 passes through the oil seal mounting cavity 34 and is connected to the oil pump rotor assembly 6 (a through hole is provided between the oil seal mounting cavity 34 and the oil pump cavity 32, and the output shaft passes through the through hole into the oil pump cavity), and the oil seal 13 is sleeved on the output shaft and disposed in the oil seal mounting cavity 34.

[0033] Preferably, the motor rotor assembly 5 is disposed inside the motor stator assembly 4. Both the motor stator assembly 4 and the motor rotor assembly 5 are existing structures and will not be described in detail in this embodiment. More preferably, the oil pump rotor assembly 6 includes an inner rotor 61 and an outer rotor 62, wherein the inner rotor 61 and the outer rotor 62 are eccentrically disposed. The inner rotor 61 is disposed inside the outer rotor 62 and the two are engaged by gears. The output shaft of the motor rotor assembly 5 is connected to the inner rotor 61. The motor rotor assembly 5 drives the inner rotor 61 and the outer rotor 62 to rotate synchronously, thereby realizing the pumping of oil.

[0034] Since the oil seal mounting cavity 34 is provided with an oil seal thrust groove 31 on its circumferential wall, when the electronic oil pump is working under high pressure and harsh conditions, the high pressure oil in the oil pump cavity 32 will squeeze the inner wall 132 of the oil seal through the inside of the oil seal, causing the outer wall 131 of the oil seal to deform and bulge into the oil seal thrust groove 31. This can increase the adhesion of the oil seal 13 and avoid the problem of the oil seal 13 being squeezed out of the oil seal mounting cavity 34.

[0035] Preferably, in this embodiment Figures 1-3 The illustration shows an oil seal thrust groove 31 on the circumferential wall of the oil seal mounting cavity 34. However, in some embodiments, the number of oil seal thrust grooves 31 may be N, and the N oil seal thrust grooves 31 are arranged along the axial direction of the oil seal mounting cavity 34, where N is a natural number greater than or equal to 2. By increasing the number of oil seal thrust grooves 31, the circumferential outer wall 131 of the oil seal can be embedded to a greater extent, further improving the adhesion of the oil seal under high-pressure and harsh operating conditions.

[0036] Preferably, the cross-sectional shape of the oil seal thrust groove 31 can be one of the following: triangular, rectangular, semi-circular, trapezoidal, and semi-teardrop; see also Figures 4-7 ,in Figure 4 The illustration shows that the cross-sectional shape of the oil seal thrust groove 31 is rectangular. Figure 5 The illustration shows that the cross-sectional shape of the oil seal thrust groove 31 is semi-teardrop shaped. Figure 6 The illustration shows that the cross-sectional shape of the oil seal thrust groove 31 is trapezoidal. Figure 7 The illustration shows that the cross-sectional shape of the oil seal thrust groove 31 is semi-circular. Of course, in addition to the cross-sectional shape of the oil seal thrust groove listed in this embodiment, those skilled in the art can also change and adjust the cross-sectional shape of the oil seal thrust groove as needed, which will not be listed in detail in this embodiment.

[0037] See Figure 1 and Figure 2 The housing 3 is also provided with a front end mounting cavity 35. The front end mounting cavity 35 is located on the side of the oil seal mounting cavity 34 away from the oil pump inner cavity 32. The front end mounting cavity 35 connects the oil seal mounting cavity 34 and the motor inner cavity 33. The front end mounting cavity 35 is used to install the bearing at the front end of the output shaft of the motor rotor assembly 5.

[0038] Preferably, in this embodiment, the front mounting cavity 35 is disposed in the inner cavity 33 of the motor. In some embodiments, the front mounting cavity 35 may be disposed below the inner cavity 33 of the motor. The arrangement in this embodiment can shorten the length of the output shaft of the motor rotor assembly 5, making the overall structure of the electronic oil pump more compact.

[0039] Furthermore, a wave-shaped gasket 12 is provided between the front bearing of the motor rotor assembly 5 and the bottom surface of the front mounting cavity 35, such as... Figure 1 and Figure 3 As shown, the wave-shaped shim 12 can provide axial thrust to the front bearing of the motor rotor assembly 5. At the same time, the wave-shaped shim 12 can prevent loosening and reduce impact, and must have good elasticity and impact resistance.

[0040] Preferably, the electronic oil pump further includes a controller mounting assembly, and the housing 3 is also provided with a rear mounting cavity 36. The rear mounting cavity 36 is located on the side of the motor inner cavity 33 away from the oil pump inner cavity 32, and the rear mounting cavity 36 communicates with the motor inner cavity 33. The controller mounting assembly is fixedly located on the side of the rear mounting cavity 36 away from the motor inner cavity 33, and the bearing at the rear end of the output shaft of the motor rotor assembly 5 is mounted on the controller mounting assembly.

[0041] Preferably, in some embodiments, there may not be a clearly defined rear mounting cavity 36, that is, the rear mounting cavity 36 and the motor inner cavity 33 are a single cavity, and the rear section of this cavity is the rear mounting cavity 36 in this embodiment.

[0042] Furthermore, the controller mounting assembly includes a controller mounting end cover 2 and a tail cover 1. The controller mounting end cover 2 is fixedly disposed on the side of the rear mounting cavity 36 away from the motor inner cavity 33. The tail cover 1 is disposed on the controller mounting end cover 2, and the two form a controller mounting cavity. The bearing at the rear end of the output shaft of the motor rotor assembly 5 is mounted on the controller mounting end cover 2. The controller mounting cavity is used to mount a control board, which is mounted on the controller mounting end cover 2. The control board is used to control the operation of the electronic oil pump.

[0043] Preferably, the tail cover 1 is provided with a waterproof and breathable valve 8, which enables the controller mounting cavity to communicate with the outside world, allowing air circulation between the controller mounting cavity and the outside world, while preventing external moisture from entering the controller mounting cavity.

[0044] Preferably, sealing rings are provided between the controller mounting end cover 2 and the tail cover 1, and between the controller mounting end cover 2 and the housing 3; specifically, an end cover sealing ring 9 is provided between the controller mounting end cover 2 and the tail cover 1, and a housing rear end sealing ring 10 is provided between the controller mounting end cover 2 and the housing 3; furthermore, a housing front end sealing ring 11 is also provided on the outer periphery of the housing 3, thereby realizing a sealed connection between the electronic oil pump and the gearbox.

[0045] Preferably, the pump cover 7 is provided with an inlet and an outlet, and both the inlet and outlet are provided with oil port sealing rings 14. The inlet and outlet are connected to the inner cavity 32 of the oil pump, thereby realizing the intake and discharge of oil. The oil port sealing rings 14 are used to ensure the sealing of the inlet and outlet connections with other pipelines.

[0046] Preferably, a magnet is provided at the rear end of the output shaft of the motor rotor assembly, and the magnet is correspondingly set with the sensing chip on the control board, so as to realize the detection of the rotor position.

[0047] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. An electronic oil pump housing with an oil seal thrust groove, characterized in that, The housing (3) is provided with an oil pump cavity (32), a motor cavity (33) and an oil seal mounting cavity (34). The oil seal mounting cavity (34) is located between the oil pump cavity (32) and the motor cavity (33) and is connected to both the oil pump cavity (32) and the motor cavity (33). The circumferential wall of the oil seal mounting cavity (34) is provided with an oil seal thrust groove (31).

2. The electronic oil pump housing with oil seal thrust groove according to claim 1, characterized in that, The number of the oil seal thrust grooves (31) is N, and the N oil seal thrust grooves (31) are arranged along the axial direction of the oil seal mounting cavity (34), where N is a natural number greater than or equal to 2.

3. The electronic oil pump housing with oil seal thrust groove according to claim 1, characterized in that, The cross-sectional shape of the oil seal thrust groove (31) is one of the following: triangle, rectangle, semicircle, trapezoid and semi-teardrop.

4. An electronic oil pump, characterized in that, The device includes a motor stator assembly (4), a motor rotor assembly (5), an oil pump rotor assembly (6), a pump cover (7), an oil seal (13), and a housing as described in any one of claims 1-3. The motor stator assembly (4) and the motor rotor assembly (5) are disposed in the motor cavity (33). The oil pump rotor assembly (6) is disposed in the oil pump cavity (32), and the side of the oil pump cavity (32) away from the motor cavity (33) is sealed by the pump cover (7). The output shaft of the motor rotor assembly (5) passes through the oil seal mounting cavity (34) and is connected to the oil pump rotor assembly (6). The oil seal (13) is sleeved on the output shaft and disposed in the oil seal mounting cavity (34).

5. The electronic oil pump according to claim 4, characterized in that, The housing (3) is also provided with a front end mounting cavity (35), which is located on the side of the oil seal mounting cavity (34) away from the oil pump inner cavity (32). The front end mounting cavity (35) connects the oil seal mounting cavity (34) and the motor inner cavity (33). The front end mounting cavity (35) is used to install the bearing at the front end of the output shaft of the motor rotor assembly (5).

6. The electronic oil pump according to claim 5, characterized in that, It also includes a controller mounting assembly. The housing (3) is further provided with a rear mounting cavity (36). The rear mounting cavity (36) is located on the side of the motor cavity (33) away from the oil pump cavity (32). The rear mounting cavity (36) communicates with the motor cavity (33). The controller mounting assembly is fixedly located on the side of the rear mounting cavity (36) away from the motor cavity (33). The bearing at the rear end of the output shaft of the motor rotor assembly (5) is mounted on the controller mounting assembly.

7. The electronic oil pump according to claim 6, characterized in that, The controller mounting assembly includes a controller mounting end cover (2) and a tail cover (1). The controller mounting end cover (2) is fixedly disposed on the side of the rear mounting cavity (36) away from the motor inner cavity (33). The tail cover (1) is disposed on the controller mounting end cover (2) and the two form a controller mounting cavity. The bearing at the rear end of the output shaft of the motor rotor assembly (5) is mounted on the controller mounting end cover (2).

8. The electronic oil pump according to claim 7, characterized in that, The tail cap (1) is provided with a waterproof and breathable valve (8), which enables the controller mounting cavity to communicate with the outside.

9. The electronic oil pump according to claim 7, characterized in that, A sealing ring is provided between the controller mounting end cover (2) and the tail cover (1) and between the controller mounting end cover (2) and the housing (3).

10. The electronic oil pump according to any one of claims 4-9, characterized in that, The pump cover (7) is provided with an inlet and an outlet, and both the inlet and outlet are provided with an oil port sealing ring (14).

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