Electronic oil pump assembly

Abstract

An electronic oil pump assembly comprises a motor and an oil pump. The motor comprises a motor shell, a motor stator, a controller cover, a motor controller and a motor shaft; the oil pump comprises an oil pump cover, an electronic oil pump installation body and an oil pump rotor. The problems of light weight and low cost of the electronic oil pump are effectively solved, and meanwhile the oil leakage problem of motor stator grounding and the precision problem of the matching position of the motor stator grounding and the oil pump are effectively solved. The grounding path of the motor controller and the motor stator is from the motor controller to the motor stator to the motor shell insert to the electronic oil pump mounting body, the grounding mode is reliable, the problem that the injection molding position of the motor shell cannot be grounded is solved, and the oil leakage risk of the grounding path is effectively avoided. According to the injection molding motor shell, the insert is adopted at the oil pump rotor matching position, the requirement for high oil pump rotor matching precision is met, and it is guaranteed that the oil pump performance is not reduced after the motor shell is subjected to injection molding.

Description

Technical Field

[0001] This invention relates to the field of electronic oil pump technology, and more specifically to an electronic oil pump assembly. Background Technology

[0002] As an upgraded replacement for traditional mechanical oil pumps, electronic oil pumps have gradually become more widespread in the automotive, industrial machinery, and new energy sectors in recent years. Their core advantage lies in achieving precise regulation of flow and pressure through electric drive and intelligent control. Electronic oil pumps use a drive motor to rotate the pump rotor, thus outputting oil at a specific pressure and flow rate. Currently, electronic oil pumps are generally composed of a pump cover, an outer pump rotor, an inner pump rotor, a motor housing, a motor assembly, a controller, and a motor controller cover.

[0003] Existing electronic oil pump solution 1: The motor housing is made of aluminum alloy, resulting in a heavier overall weight and higher cost. The motor stator is grounded through the motor housing, and the motor controller is grounded via a grounding spring from the controller to the aluminum alloy controller cover, and then to the motor housing. Existing electronic oil pump solution 2: The motor housing is made of injection-molded material, resulting in a lighter overall weight and lower cost. However, the precision at the connection between the motor housing and the pump rotor is reduced, leading to a decrease in the pump's volumetric efficiency. The motor stator is grounded via a metal bushing connected to screw holes on the motor housing, posing a risk of oil leakage in this grounding path. Summary of the Invention

[0004] The purpose of this invention is to provide an electronic oil pump assembly, including: a motor and an oil pump.

[0005] The motor includes a motor housing, a motor stator, a controller cover, a motor controller, and a motor shaft.

[0006] The oil pump includes an oil pump cover, an electronic oil pump mounting body, and an oil pump rotor.

[0007] The interior of the motor housing has a cavity for accommodating the motor stator and motor controller.

[0008] The motor stator is installed inside the motor housing, and the motor controller is installed on one side of the motor stator.

[0009] The motor controller has a controller cover installed on the side away from the motor stator.

[0010] The motor stator has a motor housing insert on the side away from the motor controller.

[0011] The motor housing insert is injection molded integrally with the motor housing.

[0012] The motor housing insert has a shaft hole at its center for fixing the motor shaft.

[0013] The motor housing insert has a rotor cavity on the side away from the motor stator to accommodate the oil pump rotor.

[0014] The oil pump rotor is installed inside the rotor cavity of the motor housing insert, and an oil pump cover is installed on the side away from the motor housing insert.

[0015] The motor shaft passes sequentially through the oil pump rotor, the shaft hole of the motor housing insert, and the motor stator, and engages with the oil pump rotor and the motor stator respectively.

[0016] The electronic oil pump mounting body is installed on the outside of the motor housing at one end near the oil pump cover.

[0017] The grounding position of the motor controller is connected to the motor stator through the connection terminal.

[0018] The motor stator is connected to the motor housing insert via a grounding terminal.

[0019] The motor housing insert is connected to the electronic oil pump mounting body via a grounding spring, thereby grounding the motor stator and motor controller.

[0020] Furthermore, the motor stator includes a plurality of stacked and fastened motor stator laminations.

[0021] Furthermore, the motor stator laminations include silicon steel sheets.

[0022] Furthermore, the motor stator laminations and the connecting terminals are connected by an interference fit.

[0023] The motor stator laminations and the grounding terminal are connected by an interference fit.

[0024] Furthermore, the material used for the motor housing insert includes aluminum alloy.

[0025] Furthermore, the rotor cavity and shaft hole of the motor housing insert are provided with an eccentricity.

[0026] The eccentricity is the eccentricity of the outer rotor in the oil pump rotor.

[0027] Furthermore, the motor controller and the connection terminal are connected using a fisheye pin.

[0028] Furthermore, the connecting terminals are made of materials including copper alloys.

[0029] Furthermore, the grounding terminal and the motor housing insert are connected by radial compression.

[0030] Furthermore, the grounding terminal and the motor housing insert are connected by end face pressing.

[0031] The technical effects of this invention are undeniable. This invention effectively solves the problems of lightweighting and low cost of electronic oil pumps, while also effectively solving the oil leakage problem of motor stator grounding and the precision problem at the interface with the oil pump.

[0032] The beneficial effects of this invention are as follows:

[0033] 1. The grounding path of the motor controller and motor stator is reliable, from the motor controller to the motor stator to the motor housing insert to the electronic oil pump mounting body. This solves the problem of grounding failure at the injection molding point of the motor housing and effectively avoids the risk of oil leakage from the grounding path.

[0034] 2. The injection-molded motor housing uses inserts at the oil pump rotor mating point, which meets the high precision requirements of the oil pump rotor mating and ensures that the oil pump performance is not reduced after the motor housing is injection-molded. Attached Figure Description

[0035] Figure 1 This is a schematic diagram of the electronic oil pump assembly of the present invention;

[0036] Figure 2 This is a rear view of the motor housing of the present invention;

[0037] Figure 3 This is a front view of the motor housing of the present invention;

[0038] Figure 4 This is a front view of the motor housing insert of the present invention;

[0039] Figure 5 This is a rear view of the motor housing insert of the present invention;

[0040] Figure 6 This is a grounding schematic diagram of the present invention;

[0041] In the diagram: 1. Oil pump cover; 2. Motor housing; 2-1. Motor housing insert; 3. Motor stator; 3-1. Motor stator laminations; 4. Controller cover; 5. Motor controller; 6. Connecting terminal; 7. Grounding terminal; 8. Grounding spring; 9. Electronic oil pump mounting body. Detailed Implementation

[0042] The present invention will be further described below with reference to embodiments, but it should not be construed that the scope of the present invention is limited to the following embodiments. Various substitutions and modifications made based on ordinary technical knowledge and common practices in the art without departing from the above-described technical concept of the present invention should be included within the scope of protection of the present invention.

[0043] Example 1:

[0044] See Figures 1 to 6 An electronic oil pump assembly includes: a motor and an oil pump.

[0045] The motor includes a motor housing 2, a motor stator 3, a controller cover 4, a motor controller 5, and a motor shaft.

[0046] The oil pump includes an oil pump cover 1, an electronic oil pump mounting body 9, and an oil pump rotor.

[0047] The interior of the motor housing 2 has a cavity for accommodating the motor stator 3 and the motor controller 5.

[0048] The motor stator 3 is installed inside the motor housing 2, and the motor controller 5 is installed on one side of the motor stator 3.

[0049] The motor controller 5 is equipped with a controller cover 4 on the side away from the motor stator 3.

[0050] The motor stator 3 is provided with a motor housing insert 2-1 on the side away from the motor controller 5.

[0051] The motor housing insert 2-1 is injection molded integrally with the motor housing 2.

[0052] The motor housing insert 2-1 has a shaft hole at its center for fixing the motor shaft.

[0053] The motor housing insert 2-1 has a rotor cavity for accommodating the oil pump rotor on the side away from the motor stator 3.

[0054] The oil pump rotor is installed in the rotor cavity of the motor housing insert 2-1, and the oil pump cover 1 is installed on the side away from the motor housing insert 2-1.

[0055] The motor shaft passes sequentially through the oil pump rotor, the shaft hole of the motor housing insert 2-1, and the motor stator 3, and cooperates with the oil pump rotor and the motor stator 3 respectively.

[0056] The electronic oil pump mounting body 9 is installed on the outside of the motor housing 2 at one end near the oil pump cover 1.

[0057] The grounding position of the motor controller 5 is connected to the motor stator 3 through the connection terminal 6.

[0058] The motor stator 3 is connected to the motor housing insert 2-1 via the grounding terminal 7.

[0059] The motor housing insert 2-1 is connected to the electronic oil pump mounting body 9 through the grounding spring 8, thereby grounding the motor stator 3 and the motor controller 5.

[0060] Example 2:

[0061] An electronic oil pump assembly, the main technical contents of which are described in Embodiment 1, further wherein the motor stator 3 includes a plurality of stacked and fastened motor stator laminations 3-1.

[0062] Example 3:

[0063] An electronic oil pump assembly, the main technical contents of which are described in any one of Embodiments 1 to 2, further wherein the motor stator lamination 3-1 comprises silicon steel sheets.

[0064] Example 4:

[0065] An electronic oil pump assembly, the main technical contents of which are described in any one of Embodiments 1 to 3, further wherein the motor stator laminations 3-1 and the connecting terminal 6 are connected by an interference fit.

[0066] The motor stator laminations 3-1 and the grounding terminal 7 are connected by an interference fit.

[0067] Example 5:

[0068] An electronic oil pump assembly, the main technical contents of which are described in any one of Embodiments 1 to 4, further wherein the material used for the motor housing insert 2-1 includes aluminum alloy.

[0069] Example 6:

[0070] An electronic oil pump assembly, the main technical contents of which are described in any one of embodiments 1 to 5, further wherein the rotor cavity and shaft hole of the motor housing insert 2-1 are provided with eccentricity.

[0071] The eccentricity is the eccentricity of the outer rotor in the oil pump rotor.

[0072] Example 7:

[0073] An electronic oil pump assembly, the main technical contents of which are described in any one of embodiments 1 to 6, further wherein the motor controller 5 and the connection terminal 6 are connected by a fisheye pin.

[0074] Example 8:

[0075] An electronic oil pump assembly, the main technical contents of which are described in any one of Embodiments 1 to 7, further wherein the material used for the connecting terminal 6 includes a copper alloy.

[0076] Example 9:

[0077] An electronic oil pump assembly, the main technical contents of which are described in any one of Embodiments 1 to 8, further wherein the grounding terminal 7 and the motor housing insert 2-1 are connected by radial compression.

[0078] Example 10:

[0079] An electronic oil pump assembly, the main technical contents of which are described in any one of embodiments 1 to 9, further wherein the grounding terminal 7 and the motor housing insert 2-1 are connected by end face pressing.

[0080] Example 11:

[0081] See Figures 1 to 6 An electronic oil pump assembly includes: a motor and an oil pump.

[0082] The motor includes a motor housing 2, a motor stator 3, a controller cover 4, a motor controller 5, and a motor shaft.

[0083] The oil pump includes an oil pump cover 1, an electronic oil pump mounting body 9, and an oil pump rotor.

[0084] The interior of the motor housing 2 has a cavity for accommodating the motor stator 3 and the motor controller 5.

[0085] The motor housing is an injection molded part, and the motor housing is manufactured using an inlay process.

[0086] The motor stator 3 is installed inside the motor housing 2, and the motor controller 5 is installed on one side of the motor stator 3.

[0087] The motor controller 5 is equipped with a controller cover 4 on the side away from the motor stator 3.

[0088] The motor stator 3 is provided with a motor housing insert 2-1 on the side away from the motor controller 5.

[0089] The motor housing insert 2-1 is injection molded integrally with the motor housing 2.

[0090] The motor housing insert 2-1 has a shaft hole at its center for fixing the motor shaft.

[0091] The diameter of the shaft hole is 8mm to 12mm.

[0092] The motor housing insert 2-1 has a rotor cavity for accommodating the oil pump rotor on the side away from the motor stator 3.

[0093] The rotor cavity is fitted to the outer diameter of the outer rotor, and the fitting clearance is 0.06-0.35 mm. The depth of the rotor cavity is 0.03-0.15 mm deeper than the thickness of the outer rotor.

[0094] The oil pump rotor is installed in the rotor cavity of the motor housing insert 2-1, and the oil pump cover 1 is installed on the side away from the motor housing insert 2-1.

[0095] The motor shaft passes sequentially through the oil pump rotor, the shaft hole of the motor housing insert 2-1, and the motor stator 3, and cooperates with the oil pump rotor and the motor stator 3 respectively.

[0096] The electronic oil pump mounting body 9 is installed on the outside of the motor housing 2 at one end near the oil pump cover 1.

[0097] The grounding position of the motor controller 5 is connected to the motor stator 3 through the connection terminal 6.

[0098] The motor stator 3 is connected to the motor housing insert 2-1 via the grounding terminal 7.

[0099] The motor housing insert 2-1 is connected to the electronic oil pump mounting body 9 through the grounding spring 8, thereby grounding the motor stator 3 and the motor controller 5.

[0100] Example 12:

[0101] An electronic oil pump assembly, the main technical contents of which are described in Embodiment 11, further wherein the motor stator 3 includes a plurality of stacked and fastened motor stator laminations 3-1.

[0102] Example 13:

[0103] An electronic oil pump assembly, the main technical contents of which are described in any one of Embodiments 11 to 12, further wherein the motor stator lamination 3-1 comprises silicon steel sheets.

[0104] Example 14:

[0105] An electronic oil pump assembly, the main technical contents of which are described in any one of embodiments 11 to 13, further wherein the motor stator laminations 3-1 and the connecting terminal 6 are connected by an interference fit.

[0106] The motor stator laminations 3-1 and the grounding terminal 7 are connected by an interference fit.

[0107] Example 15:

[0108] An electronic oil pump assembly, the main technical contents of which are described in any one of Embodiments 11 to 14, further wherein the material used for the motor housing insert 2-1 includes aluminum alloy.

[0109] Example 16:

[0110] An electronic oil pump assembly, the main technical contents of which are described in any one of embodiments 11 to 15, further wherein the rotor cavity and shaft hole of the motor housing insert 2-1 are provided with eccentricity.

[0111] The eccentricity is the eccentricity of the outer rotor in the oil pump rotor.

[0112] Example 17:

[0113] An electronic oil pump assembly, the main technical contents of which are described in any one of embodiments 11 to 16, further wherein the motor controller 5 and the connection terminal 6 are connected by a fisheye pin.

[0114] Example 18:

[0115] An electronic oil pump assembly, the main technical contents of which are described in any one of Embodiments 11 to 17, further wherein the material used for the connecting terminal 6 includes a copper alloy.

[0116] Example 19:

[0117] An electronic oil pump assembly, the main technical contents of which are described in any one of embodiments 11 to 18, further wherein the grounding terminal 7 and the motor housing insert 2-1 are connected by radial compression.

[0118] Example 20:

[0119] An electronic oil pump assembly, the main technical contents of which are described in any one of embodiments 11 to 19, further wherein the grounding terminal 7 and the motor housing insert 2-1 are connected by end face pressing.

[0120] Example 21:

[0121] See Figures 1 to 6 An electronic oil pump assembly, the main technical contents of which include:

[0122] An electronic oil pump assembly mainly includes an oil pump cover, oil pump cover screws, an oil pump housing, a motor stator assembly, and a motor controller cover. The motor housing is an injection-molded part, manufactured using an inlay process. An inlay, made of aluminum alloy, is used at the interface between the motor housing and the oil pump rotor. The inlay is integrally molded with the motor housing during the injection molding process. The inlay has a central hole with a diameter of 8-12 mm, which mates with the motor shaft for mounting and positioning. The inlay has an outer rotor hole on the oil pump rotor side, which mates with the outer diameter of the outer rotor. The clearance between the outer rotor hole and the central hole is 0.06-0.35 mm. The eccentricity between the outer rotor hole and the central hole is equal to the eccentricity of the inner and outer rotors of the oil pump. The depth of the outer rotor hole is 0.03-0.15 mm deeper than the thickness of the outer rotor. The motor controller's grounding point is connected to the motor stator via a connecting terminal. This connecting terminal uses a fisheye fit with the motor controller and an interference fit with the silicon steel sheet of the motor stator. The connecting terminal is made of copper alloy. On the oil pump side, the motor stator's silicon steel sheet is connected to the motor housing insert via a grounding terminal. This grounding terminal is also an interference fit with the motor stator's silicon steel sheet and is radially or end-face pressed into the motor housing insert. The motor housing insert is pressed into the electronic oil pump mounting body via a grounding spring, thus grounding the motor controller and motor stator.

Claims

1. An electronic oil pump assembly, characterized in that, include: Motor, oil pump; The motor includes a motor housing (2), a motor stator (3), a controller cover (4), a motor controller (5), and a motor shaft; The oil pump includes an oil pump cover (1), an electronic oil pump mounting body (9), and an oil pump rotor; The interior of the motor housing (2) has a chamber for accommodating the motor stator (3) and the motor controller (5); The motor stator (3) is installed inside the motor housing (2), and the motor controller (5) is installed on one side of the motor stator (3); The motor controller (5) has a controller cover (4) installed on the side away from the motor stator (3); The motor stator (3) is provided with a motor housing insert (2-1) on the side away from the motor controller (5). The motor housing insert (2-1) is injection molded integrally with the motor housing (2); The motor housing insert (2-1) has a shaft hole at its center for fixing the motor shaft; The motor housing insert (2-1) has a rotor cavity for accommodating the oil pump rotor on the side away from the motor stator (3); The oil pump rotor is installed in the rotor cavity of the motor housing insert (2-1), and an oil pump cover (1) is installed on the side away from the motor housing insert (2-1). The motor shaft passes sequentially through the oil pump rotor, the shaft hole of the motor housing insert (2-1), and the motor stator (3), and cooperates with the oil pump rotor and the motor stator (3) respectively; The electronic oil pump mounting body (9) is installed on the outside of the motor housing (2) at one end near the oil pump cover (1); The grounding position of the motor controller (5) is connected to the motor stator (3) through the connection terminal (6); The motor stator (3) is connected to the motor housing insert (2-1) through the grounding terminal (7); The motor housing insert (2-1) is connected to the electronic oil pump mounting body (9) through the grounding spring (8), thereby grounding the motor stator (3) and the motor controller (5).

2. The electronic oil pump assembly according to claim 1, characterized in that, The motor stator (3) includes several stacked and fastened motor stator laminations (3-1).

3. The electronic oil pump assembly according to claim 2, characterized in that, The motor stator laminations (3-1) include silicon steel sheets.

4. An electronic oil pump assembly according to claim 2, characterized in that, The motor stator laminations (3-1) and the connecting terminal (6) are connected by an interference fit; The motor stator laminations (3-1) and the grounding terminal (7) are connected by an interference fit.

5. An electronic oil pump assembly according to claim 1, characterized in that, The material used for the motor housing insert (2-1) includes aluminum alloy.

6. An electronic oil pump assembly according to claim 1, characterized in that, The rotor cavity and shaft hole of the motor housing insert (2-1) are provided with eccentricity; The eccentricity is the eccentricity of the outer rotor in the oil pump rotor.

7. An electronic oil pump assembly according to claim 1, characterized in that, The motor controller (5) and the connection terminal (6) are connected using a fisheye pin.

8. An electronic oil pump assembly according to claim 1, characterized in that, The connecting terminal (6) is made of a copper alloy.

9. An electronic oil pump assembly according to claim 1, characterized in that, The grounding terminal (7) and the motor housing insert (2-1) are connected by radial compression.

10. An electronic oil pump assembly according to claim 1, characterized in that, The grounding terminal (7) and the motor housing insert (2-1) are connected by end face pressing.

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