Electrical sealing structure for electronic oil pump

Abstract

The utility model relates to an electric sealing structure for an electronic oil pump. The motor comprises a shell, wherein a rotor cavity, a motor cavity and a control cavity are sequentially arranged in the shell along the axial direction; the rotor assembly comprises an outer rotor and an inner rotor which are respectively arranged in the rotor cavity and are matched with each other; the permanent magnet motor is mounted in the motor cavity, and a driving shaft of the permanent magnet motor is connected with the inner rotor; the controller is mounted in the control cavity; the guide sleeve comprises a guide through hole; the partition body is arranged between the motor cavity and the control cavity, and the partition body is provided with an installation through hole suitable for the guide sleeve to stretch in and be installed; the pin is connected to the permanent magnet motor, and the pin extends into the guide through hole and is led out from the mounting through hole into the control cavity; the area, outside the guide sleeve, in the installation through hole is filled with sealant. According to the utility model, the pins are effectively sealed, the high requirement on the location degree of the pins is reduced, and oil leakage and sealing failure are prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of automotive electric drive systems, and in particular to an electrical sealing structure for an electronic oil pump. Background Art

[0002] The electronic oil pump, together with structures such as the oil circuit, heat exchanger, and filter in the electric drive system, constitutes the cooling and lubrication system of the electric drive system. It receives signals from the superior system, provides lubricating oil with a certain flow rate and pressure, and feeds back its own status to the superior system.

[0003] The main structure of the electronic oil pump includes a controller, a permanent magnet motor, an inner rotor, an outer rotor, a rotor cavity, a motor cavity, a controller cavity, and a pump cover. Its working principle is that the controller energizes the permanent magnet motor to drive the inner rotor to rotate. The inner and outer rotors are eccentric, and several closed cavities are formed between them. The inner rotor drives the outer rotor to rotate in the same direction, realizing the rotation of the closed cavity and its volume change, thereby realizing oil pumping. The rotor cavity is divided into a low-pressure oil inlet area and a high-pressure oil outlet area. The oil is introduced into the motor cavity from the high-pressure oil outlet area and then flows back to the external oil circuit from the low-pressure oil inlet area, thereby realizing the cooling of the permanent magnet motor and the controller and ensuring that the electronic oil pump operates within a certain temperature range.

[0004] However, the permanent magnet motor is powered by 3 PINs (pins) passing through the motor cavity and the controller cavity. Since the controller generally cannot come into contact with the oil, sealing is required at the PINs. The common sealing method is to use a rubber ring for sealing, but this method has high requirements for the positional accuracy of the PINs. Otherwise, it will cause sealing failure and lead to damage to the controller. Summary of the Utility Model

[0005] Therefore, the utility model provides an electrical sealing structure for an electronic oil pump, which realizes the effective sealing of the pins (PINs) through the combined action of a guide sleeve and sealant, reduces the high requirements for the positional accuracy of the pins, and prevents oil leakage and sealing failure.

[0006] To solve the above technical problems, the utility model provides an electrical sealing structure for an electronic oil pump, including:

[0007] A housing, in which a rotor cavity, a motor cavity, and a control cavity are sequentially arranged along the axial direction;

[0008] A rotor assembly, including an outer rotor and an inner rotor respectively installed in the rotor cavity and cooperating with each other;

[0009] A permanent magnet motor, installed in the motor cavity and having a drive shaft connected to the inner rotor;

[0010] A controller, installed in the control cavity;

[0011] A guide sleeve, including a guiding through hole;

[0012] A separator is disposed between the motor cavity and the control cavity. The separator is provided with a mounting through hole adapted for the guide sleeve to extend into and be installed.

[0013] A pin is connected to the permanent magnet motor. The pin extends into the guiding through hole and is led out from the mounting through hole to the control cavity. Wherein, the area in the mounting through hole outside the guide sleeve is filled with sealant.

[0014] In an embodiment of the present utility model, the guide sleeve is installed on one side of the mounting through hole close to the motor cavity.

[0015] In an embodiment of the present utility model, the guide sleeve includes a baffle and a guide sleeve body extending from the baffle. After the guide sleeve extends into the mounting through hole, the baffle abuts against the outer wall of the separator.

[0016] In an embodiment of the present utility model, the guiding through hole gradually contracts in a direction away from the motor cavity.

[0017] In an embodiment of the present utility model, the cross-section of the guiding through hole is rectangular.

[0018] In an embodiment of the present utility model, the outer wall of the guide sleeve body is axially provided with ribs extending to the baffle, and the ribs are in interference fit with the mounting through hole.

[0019] In an embodiment of the present utility model, the guide sleeve is made of an insulating material.

[0020] In an embodiment of the present utility model, the separator is made of a metal material.

[0021] In an embodiment of the present utility model, a front pump cover and a rear pump cover are respectively installed at both ends of the housing. A support body is disposed in the housing. A rotor cavity is formed between the front pump cover and the housing. A motor cavity is formed between the support body and the separator. The rear pump cover is in positioning fit with the separator and a control cavity is formed therebetween.

[0022] In an embodiment of the present utility model, a shaft seat for the driving shaft to extend into is provided in the middle of one end face of the separator, and the controller is installed on the other end face of the separator.

[0023] The above technical solution of the present utility model has the following advantages compared with the prior art:

[0024] An electrical sealing structure for an electronic oil pump according to the present utility model, the guide sleeve and the sealant act together to achieve effective sealing of the pins, reduce the high requirements for the positional accuracy of the pins, prevent oil leakage and seal failure, protect the controller from oil damage, and extend its service life.

[0025] The guide sleeve design of the present utility model has a guiding function, ensuring the precise installation of the pins, simplifying the installation process, and improving the installation accuracy.

[0026] The guide sleeve of the present utility model is made of insulating material, effectively achieving electrical insulation between the pins and the metal flange, preventing electrical short - circuit and leakage, and improving safety; the separator is made of metal material, has good heat - conducting performance, ensures effective cooling of the controller and the motor, and improves the working efficiency and reliability of the system.

[0027] The design of the outer shell and each component of the present utility model is compact and reasonable, facilitating installation and maintenance, and reducing production and maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to make the content of the present utility model easier to be clearly understood, the following further details the present utility model according to specific embodiments of the present utility model in conjunction with the drawings.

[0029] Figure 1 is a cross - sectional structure diagram of the electrical sealing structure for an electronic oil pump of the present utility model.

[0030] Figure 2 is Figure 1 a partial enlarged structure diagram of...

[0031] Figure 3 is a cross - sectional structure diagram of the axially - sectioned electrical sealing structure (omitting the separator) for an electronic oil pump of the present utility model.

[0032] Figure 4 is a structure diagram of the separator of the present utility model.

[0033] Figure 5 is a structure diagram of the guide sleeve of the present utility model.

[0034] DESCRIPTION OF THE REFERENCE NUMERALS IN THE DRAWINGS OF THE SPECIFICATION:

[0035] 1. Outer shell; 11. Rotor cavity; 12. Motor cavity; 13. Control cavity; 14. Front pump cover; 15. Rear pump cover; 16. Support body; 17. Shaft seat;

[0036] 2. Rotor assembly; 21. Outer rotor; 22. Inner rotor;

[0037] 3. Permanent - magnet motor; 31. Drive shaft;

[0038] 4. Controller;

[0039] 5. Guide sleeve; 51. Guide through hole; 52. Baffle; 53. Guide sleeve body; 54. Rib

[0040] 6. Separator; 61. Installation through hole

[0041] 7. Pin Detailed implementation manners

[0042] The following further illustrates the present utility model in conjunction with the accompanying drawings and specific embodiments, so that those skilled in the art can better understand the present utility model and be able to implement it, but the illustrated embodiments are not intended to limit the present utility model.

[0043] In the present utility model, when directions (up, down, left, right, front and back) are described, it is only for the convenience of describing the technical solution of the present utility model, rather than indicating or implying that the technical features referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present utility model.

[0044] In the present utility model, the meaning of "several" is one or more, the meaning of "multiple" is two or more, and understandings such as "greater than", "less than", "exceeding" do not include the present number; understandings such as "above", "below", "within" include the present number. In the description of the present utility model, if "first" and "second" are described, they are only for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features or implicitly indicating the sequence relationship of the indicated technical features.

[0045] In the present utility model, unless otherwise clearly defined, words such as "set", "installed", "connected" should be understood in a broad sense. For example, they can be directly connected, or indirectly connected through an intermediate medium; they can be fixedly connected, or detachably connected, and can also be integrally formed; they can be mechanically connected, or electrically connected or capable of communicating with each other; they can be the communication inside two components or the interaction relationship between two components. Those skilled in the art can reasonably determine the specific meanings of the above words in the present utility model in combination with the specific content of the technical solution.

[0046] Refer to Figure 1 、 Figure 3 As shown, an electrical sealing structure for an electronic oil pump of the present utility model includes:

[0047] A housing 1, in which a rotor cavity 11, a motor cavity 12 and a control cavity 13 are sequentially arranged along the axial direction;

[0048] A rotor assembly 2, including an outer rotor 21 and an inner rotor 22 which are respectively installed in the rotor cavity 11 and cooperate with each other;

[0049] A permanent magnet motor 3 is installed inside the motor cavity 12, and its drive shaft 31 is connected to the inner rotor 22;

[0050] A controller 4 is installed inside the control cavity 13;

[0051] A guide sleeve 5 includes a guide through hole 51;

[0052] A separator 6 is arranged between the motor cavity 12 and the control cavity 13. The separator 6 is provided with an installation through hole 61 suitable for the guide sleeve 5 to extend into and be installed;

[0053] A pin 7 (PIN) is connected to the permanent magnet motor 3. The pin 7 extends into the guide through hole 51 and is led out from the installation through hole 61 into the control cavity 13; wherein, the area in the installation through hole 61 outside the guide sleeve 5 is filled with sealant.

[0054] It can be understood that the pin 7 connects the permanent magnet motor 3 and the controller 4 and serves to supply power to the permanent magnet motor 3. When the guide sleeve 5 is installed into the installation through hole 61, a remaining depth is reserved in the installation through hole 61 for filling the sealant.

[0055] By jointly using the guide sleeve 5 and the sealant to achieve the sealing of the pin 7 (PIN), the requirement for the positional tolerance of the PIN is effectively reduced. This design avoids the sealing failure caused by the positional deviation of the PIN, enhances the reliability of the sealing, and thus protects the controller 4 from oil damage.

[0056] In one embodiment, the guide sleeve 5 is installed on one side of the installation through hole 61 close to the motor cavity 12.

[0057] In one embodiment, referring to Figure 5 As shown, the guide sleeve 5 includes a baffle 52 and a guide sleeve body 53 extending from the baffle 52. After the guide sleeve 5 extends into the installation through hole 61, the baffle 52 abuts against the outer wall of the separator 6.

[0058] In one embodiment, referring to Figure 2 As shown, the guide through hole 51 gradually contracts in the direction away from the motor cavity 12. The guide sleeve 5 has a guiding function, enabling the pin 7 to be inserted smoothly, avoiding the deviation of the pin 7 during the installation process, and improving the installation accuracy and operation convenience.

[0059] Specifically, the cross-section of the guide through hole 51 is rectangular, the cross-section of the pin 7 is rectangular, and the minimum diameter of the guide through hole 51 is in interference fit with the pin 7.

[0060] In one embodiment, referring to Figure 5As shown, on the outer wall of the guide bushing body 53, there are axially arranged ribbed bars 54 extending to the baffle 52, and the ribbed bars 54 are in interference fit with the mounting through holes 61 (with clearance fit at other places). This not only enhances the fixing effect of the guide bushing 5 but also effectively prevents the leakage of oil along the gaps, further improving the sealing performance.

[0061] In one embodiment, the guide bushing 5 is made of an insulating material (such as plastic), ensuring electrical insulation between the pin 7 and the metal separator 6.

[0062] The separator 6 is made of a metal material (such as copper, stainless steel), which has good heat conduction performance. The metal separator 6 can conduct and dissipate heat more effectively, ensuring that the controller 4 maintains an appropriate temperature during operation, improving the overall heat dissipation performance and working efficiency of the system.

[0063] In one embodiment, referring to Figure 3 As shown, a front pump cover 14 and a rear pump cover 15 are respectively installed at both ends of the housing 1. A support body 16 is arranged inside the housing 1. A rotor cavity 11 is formed between the front pump cover 14 and the housing 1. A motor cavity 12 is formed between the support body 16 and the separator 6. The rear pump cover 15 is in positioning fit with the separator 6 and a control cavity 13 is formed between them.

[0064] The above settings form a compact and reasonable overall structure, which is convenient for installation and disassembly, improving the convenience of production and maintenance.

[0065] In one embodiment, in the middle of one end face of the separator 6, there is a shaft seat 17 for the driving shaft 31 to extend into, and the controller 4 is installed on the other end face of the separator 6.

[0066] During installation, first, the guide bushing 5 is installed into the mounting through holes 61. The remaining depth of the mounting through holes 61 is set according to the characteristics of the sealant. The pin 7 on the permanent magnet motor 3 is extended into the guiding through holes 51 and led out from the mounting through holes 61 into the control cavity 13 and connected to the controller 4. Sealant is applied to the space with the remaining depth of the mounting through holes 61 and cured, thus forming a complete sealing structure.

[0067] Finally, it should be noted that the above specific embodiments are only used to illustrate the technical solutions of the present invention rather than to limit them. Although the present invention has been described in detail with reference to the examples, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present invention, and they should all be covered within the scope of the claims of the present invention.

Claims

1. An electrical sealing structure for an electronic oil pump, characterized in that: include: A housing (1), wherein a rotor cavity (11), a motor cavity (12) and a control cavity (13) are sequentially arranged in the housing (1) along the axial direction; A rotor assembly (2), comprising an outer rotor (21) and an inner rotor (22) which are respectively installed in the rotor cavity (11) and cooperate with each other; A permanent magnet motor (3) is installed in the motor cavity (12) and its drive shaft (31) is connected to the inner rotor (22); A controller (4) installed in the control chamber (13); A guide sleeve (5), comprising a guide through hole (51); A separator (6) is arranged between the motor cavity (12) and the control cavity (13), the separator (6) being provided with a mounting through hole (61) suitable for the guide sleeve (5) to extend into and be mounted therein; A pin (7) is connected to the permanent magnet motor (3), the pin (7) extending into the guide through hole (51) and leading out from the mounting through hole (61) into the control cavity (13); wherein the mounting through hole (61) is filled with sealant in an area outside the guide sleeve (5).

2. The electrical sealing structure for an electronic oil pump according to claim 1, characterized in that: The guide sleeve (5) is installed on a side of the installation through hole (61) close to the motor cavity (12).

3. The electrical sealing structure for an electronic oil pump according to claim 1, characterized in that: The guide sleeve (5) comprises a baffle (52) and a guide sleeve body (53) extending from the baffle (52); after the guide sleeve (5) extends into the mounting through hole (61), the baffle (52) abuts against an outer wall of the partition body (6).

4. The electrical sealing structure for an electronic oil pump according to claim 1, characterized in that: The guide through hole (51) gradually shrinks in a direction away from the motor cavity (12).

5. The electrical sealing structure for an electronic oil pump according to claim 1, characterized in that: The cross section of the guide through hole (51) is rectangular.

6. The electrical sealing structure for an electronic oil pump according to claim 3, characterized in that: The outer wall of the guide sleeve body (53) is provided with a convex rib (54) extending to the baffle (52) along the axial direction, and the convex rib (54) is interference-fitted with the mounting through hole (61).

7. The electrical sealing structure for an electronic oil pump according to claim 1, characterized in that: The guide sleeve (5) is made of insulating material.

8. The electrical sealing structure for an electronic oil pump according to claim 1, characterized in that: The separator (6) is made of metal.

9. The electrical sealing structure for an electronic oil pump according to claim 1, characterized in that: A front pump cover (14) and a rear pump cover (15) are respectively mounted at both ends of the housing (1); a support body (16) is arranged inside the housing (1); the rotor cavity (11) is formed between the front pump cover (14) and the housing (1); the motor cavity (12) is formed between the support body (16) and the separator (6); the rear pump cover (15) is positioned and matched with the separator (6) to form a control cavity (13) therebetween.

10. The electrical sealing structure for an electronic oil pump according to claim 1, characterized in that: A shaft seat (17) for the drive shaft (31) to extend into is provided in the middle of one end surface of the separator (6), and the controller (4) is mounted on the other end surface of the separator (6).

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