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

Abstract

The present invention provides an electronic oil pump housing with an oil seal thrust groove and an electronic oil pump, wherein the housing is provided with an oil pump inner cavity, a motor inner cavity and an oil seal installation cavity, the oil seal installation cavity is arranged between the oil pump inner cavity and the motor inner cavity and is connected to the oil pump inner cavity and the motor inner cavity at the same time, and an oil seal thrust groove is arranged on the circumferential wall surface of the oil seal installation cavity. The oil seal thrust groove is provided in the present invention, which can solve the problem that the oil seal in the electronic oil pump is easily squeezed out of the oil seal installation cavity under the influence of high-pressure harsh working conditions, causing damage to the oil seal and seal failure.

Description

Technical Field

[0001] The invention relates to the technical field of electronic oil pumps, and in particular to an electronic oil pump housing with an oil seal thrust groove and an electronic oil pump. Background Art

[0002] The automotive industry is developing rapidly. As the performance of automobiles is moving towards being safer, more reliable, more stable, fully automatic, intelligent, environmentally friendly and energy-saving, electronic oil pumps are widely used in automotive lubrication systems and cooling systems, and can well meet market requirements.

[0003] The oil seal used to seal the inner and outer rotors and the motor cavity in the electronic oil pump is easily affected by high-pressure harsh working conditions and squeezed out of the oil seal installation cavity, causing damage to the oil seal and seal failure. At the same time, the oil seal is affected by the installation space. The oil seal that meets the high-pressure harsh working conditions cannot be installed, and the oil seal that can be installed in a small space cannot meet the harsh working conditions of high pressure.

[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. Summary of the invention

[0005] The purpose of the present invention 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 installation cavity under the influence of high pressure and harsh working conditions, causing oil seal damage and seal failure. The specific technical solution is as follows:

[0006] An electronic oil pump housing with an oil seal thrust groove, the housing is provided with an oil pump inner cavity, a motor inner cavity and an oil seal installation cavity, the oil seal installation cavity is arranged between the oil pump inner cavity and the motor inner cavity and is connected to the oil pump inner cavity and the motor inner cavity at the same time, and an oil seal thrust groove is provided on the circumferential wall surface of the oil seal installation cavity.

[0007] Preferably, the number of the 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, wherein 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 a triangle, a rectangle, a semicircle, a trapezoid and a half teardrop shape.

[0009] The present invention also provides an electronic oil pump, comprising a motor stator assembly, a motor rotor assembly, an oil pump rotor assembly, a pump cover, an oil seal and the housing, wherein the motor stator assembly and the motor rotor assembly are arranged in the inner cavity of the motor, the oil pump rotor assembly is arranged 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 sleeve is arranged on the output shaft and the oil seal is arranged in the oil seal mounting cavity.

[0010] Preferably, a front end mounting cavity is also provided on the shell, and the front end mounting cavity is arranged on the side of the oil seal mounting cavity away from the oil pump inner cavity. The front end mounting cavity connects the oil seal mounting cavity and the motor inner cavity, and the front end mounting cavity is used to install the bearing at the front end of the output shaft of the motor rotor assembly.

[0011] Preferably, it also includes a controller mounting assembly, and a rear end mounting cavity is also provided on the shell, and the rear end mounting cavity is arranged on the side of the motor inner cavity away from the oil pump inner cavity, and the rear end mounting cavity is connected to the motor inner cavity; the controller mounting assembly is fixedly arranged on the side of the rear end mounting cavity away from the motor inner cavity, and the bearing at the rear end of the output shaft of the motor rotor assembly is installed 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 arranged on the side of the rear end mounting cavity away from the motor inner cavity, the tail cover is arranged on the controller mounting end cover and a controller mounting cavity is formed between the two, and the bearing at the rear end of the output shaft of the motor rotor assembly is installed on the controller mounting end cover.

[0013] Preferably, a waterproof breathable valve is provided on the tail cover, and the waterproof breathable valve enables the controller installation cavity to communicate with the outside world.

[0014] Preferably, sealing rings are provided between the controller mounting end cover and the tail cover, and between the controller mounting end cover and the housing.

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

[0016] The application of the technical solution of the present invention has the following beneficial effects:

[0017] Since an oil seal thrust groove is provided on the circumferential wall surface of the oil seal mounting cavity, when the electronic oil pump operates under high-pressure and harsh working conditions, the high-pressure oil in the inner cavity of the oil pump 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, thereby increasing the adhesion of the oil seal and preventing the oil seal from being squeezed out of the oil seal mounting cavity, causing damage to the oil seal and sealing failure.

[0018] In addition to the above-described purposes, features and advantages, the present invention has other purposes, features and advantages. The present invention will be further described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The drawings constituting a part of this application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

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

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

[0022] Figure 3 yes Figure 1 A partial enlarged view of the thrust groove of the oil seal;

[0023] Figure 4 It is a schematic diagram of a structure in which the cross-section of the thrust groove of the oil seal is a rectangle;

[0024] Figure 5 It is a structural schematic diagram of the cross-section shape of the oil seal thrust groove being a half-teardrop shape;

[0025] Figure 6 It is a structural schematic diagram of a cross-section shape of an oil seal thrust groove being a trapezoid;

[0026] Figure 7 It is a structural schematic diagram of the cross-section shape of the oil seal thrust groove being a semicircle;

[0027] Among them, 1. tail cover, 2. controller installation end cover, 3. shell, 31. oil seal thrust groove, 32. oil pump inner cavity, 33. motor inner cavity, 34. oil seal installation cavity, 35. front end installation cavity, 36. rear end installation 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 breathable valve, 9. end cover sealing ring, 10. shell rear end sealing ring, 11. shell front end sealing ring, 12. corrugated gasket, 13. oil seal, 131. oil seal outer wall, 132. oil seal inner wall, 14. oil port sealing ring. DETAILED DESCRIPTION

[0028] In order to facilitate the understanding of the present invention, the present invention will be described more fully below, and preferred embodiments of the present invention are provided. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present invention more thorough and comprehensive.

[0029] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used in the specification of the present invention herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0030] Example:

[0031] See also Figure 1-Figure 3The present embodiment provides an electronic oil pump with an oil seal thrust groove in a housing, comprising 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, wherein 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 installation cavity 34, wherein the oil seal installation cavity 34 is arranged between the oil pump inner cavity 32 and the motor inner cavity 33 and communicates with the oil pump inner cavity 32 and the motor inner cavity 33 at the same time, and an oil seal thrust groove 31 is provided on the circumferential wall surface of the oil seal installation cavity 34;

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

[0033] Preferably, the motor rotor assembly 5 is arranged on the inner side of the motor stator assembly 4, and the motor stator assembly 4 and the motor rotor assembly 5 are both existing structures, which are not described in detail in this embodiment; further 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 arranged, the inner rotor 61 is arranged inside the outer rotor 62 and the gears are meshed between the two, and the output shaft of the motor rotor assembly 5 is connected to the inner rotor 61, and the inner rotor 61 and the outer rotor 62 are driven to rotate synchronously through the motor rotor assembly 5, thereby realizing the pumping of oil.

[0034] Since an oil seal thrust groove 31 is provided on the circumferential wall surface of the oil seal installation cavity 34, when the electronic oil pump operates under high-pressure and harsh working conditions, the high-pressure oil in the oil pump inner cavity 32 will squeeze the oil seal inner wall 132 through the inside of the oil seal, so that the oil seal outer wall 131 is deformed and protruded and embedded in the oil seal thrust groove 31, thereby increasing the adhesion of the oil seal 13 and avoiding the problem of the oil seal 13 being squeezed out of the oil seal installation cavity 34.

[0035] Preferably, the present embodiment Figure 1-Figure 3 As shown, an oil seal thrust groove 31 is provided on the circumferential wall surface of the oil seal installation cavity 34. However, in some embodiments, the number of the 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 installation cavity 34, wherein N is a natural number greater than or equal to 2. By increasing the number of oil seal thrust grooves 31, the oil seal outer wall 131 in the circumferential direction of the oil seal can be embedded to a greater extent, further improving the adhesion of the oil seal under high-pressure harsh working conditions.

[0036] Preferably, the cross-sectional shape of the oil seal thrust groove 31 may be one of a triangle, a rectangle, a semicircle, a trapezoid and a half drop shape; see Figure 4-Figure 7 ,in Figure 4 It is shown that the cross-sectional shape of the oil seal thrust groove 31 is rectangular. Figure 5 It is shown that the cross-sectional shape of the oil seal thrust groove 31 is a half-teardrop shape. Figure 6 It is shown that the cross-sectional shape of the oil seal thrust groove 31 is a trapezoid. Figure 7 It is shown that the cross-sectional shape of the oil seal thrust groove 31 is a semicircle. Of course, in addition to the cross-sectional shapes 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 according to the situation, which will not be listed in detail in this embodiment.

[0037] See also Figure 1 and Figure 2 The housing 3 is also provided with a front end mounting cavity 35, and the front end mounting cavity 35 is arranged 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, and 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, the front end mounting cavity 35 in this embodiment is arranged in the motor inner cavity 33. In some embodiments, the front end mounting cavity 35 may be arranged below the motor inner cavity 33. 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 corrugated gasket 12 is provided between the front end bearing of the motor rotor assembly 5 and the bottom surface of the front end mounting cavity 35, such as Figure 1 and Figure 3 As shown; the corrugated gasket 12 can provide axial thrust to the front end bearing of the motor rotor assembly 5, and the corrugated gasket 12 can prevent loosening and reduce impact, and must have good elasticity and impact resistance.

[0040] Preferably, the electronic oil pump also includes a controller mounting assembly, and a rear end mounting cavity 36 is also provided on the shell 3, and the rear end mounting cavity 36 is arranged on the side of the motor inner cavity 33 away from the oil pump inner cavity 32, and the rear end mounting cavity 36 is connected to the motor inner cavity 33; the controller mounting assembly is fixedly arranged on the side of the rear end 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 installed on the controller mounting assembly.

[0041] Preferably, in some embodiments, no obvious rear end installation cavity 36 may be provided, that is, the rear end installation cavity 36 and the motor inner cavity 33 are one cavity, and the rear section of the cavity is the rear end installation cavity 36 in this embodiment.

[0042] Furthermore, the controller installation assembly includes a controller installation end cover 2 and a tail cover 1, wherein the controller installation end cover 2 is fixedly arranged on the side of the rear end installation cavity 36 away from the motor inner cavity 33, the tail cover 1 is arranged on the controller installation end cover 2 and a controller installation cavity is formed between the two, and the bearing at the rear end of the output shaft of the motor rotor assembly 5 is installed on the controller installation end cover 2. The controller installation cavity is used to install a control board, wherein the control board is installed on the controller installation end cover 2, and the control board is used to control the operation of the electronic oil pump.

[0043] Preferably, a waterproof breathable valve 8 is provided on the tail cover 1, and the waterproof breathable valve 8 enables the controller installation cavity to be connected with the outside world, and the waterproof breathable valve 8 enables air circulation between the controller installation cavity and the outside world, while preventing external moisture from entering the controller installation 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; further, a housing front end sealing ring 11 is also provided on the outer periphery of the housing 3, so as to realize a sealed connection between the electronic oil pump and the gearbox.

[0045] Preferably, the pump cover 7 is provided with a liquid inlet and a liquid outlet, and both the liquid inlet and the liquid outlet are provided with an oil port sealing ring 14. The liquid inlet and the liquid outlet are connected to the oil pump cavity 32, so as to achieve the suction and discharge of oil, and the oil port sealing ring 14 is used to achieve the sealing of the liquid inlet and the liquid outlet and 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 arranged corresponding to the sensor chip on the control board, so as to detect the position of the rotor.

[0047] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

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 inner cavity (32), a motor inner cavity (33) and an oil seal installation cavity (34); the oil seal installation cavity (34) is arranged between the oil pump inner cavity (32) and the motor inner cavity (33) and is connected to the oil pump inner cavity (32) and the motor inner cavity (33); an oil seal thrust groove (31) is provided on the circumferential wall surface of the oil seal installation cavity (34).

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 installation cavity (34), wherein 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 a triangle, a rectangle, a semicircle, a trapezoid and a half-teardrop shape.

4. An electronic oil pump, characterized in that: The invention comprises 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) as claimed in any one of claims 1 to 3, wherein the motor stator assembly (4) and the motor rotor assembly (5) are arranged in an inner cavity (33) of the motor, the oil pump rotor assembly (6) is arranged in an inner cavity (32) of the oil pump and a side of the inner cavity (32) of the oil pump away from the inner cavity (33) of the motor is sealed by the pump cover (7); the output shaft of the motor rotor assembly (5) passes through an oil seal installation cavity (34) and is connected to the oil pump rotor assembly (6), the oil seal (13) is sleeved on the output shaft and the oil seal (13) is arranged in the oil seal installation 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 arranged on a side of the oil seal mounting cavity (34) away from the oil pump inner cavity (32), and the front end mounting cavity (35) is connected with the oil seal mounting cavity (34) and the motor inner cavity (33), and the front end mounting cavity (35) is used to mount a 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: The invention also comprises a controller mounting assembly, wherein the housing (3) is provided with a rear end mounting cavity (36), the rear end mounting cavity (36) being arranged on a side of the motor inner cavity (33) away from the oil pump inner cavity (32), and the rear end mounting cavity (36) being connected to the motor inner cavity (33); the controller mounting assembly is fixedly arranged on a side of the rear end 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.

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

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

9. The electronic oil pump according to claim 7, characterized in that: Sealing rings are provided between the controller installation end cover (2) and the tail cover (1), and between the controller installation end cover (2) and the housing (3).

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

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