Dry and wet shielding cover-driving circuit board mounting structure of electronic water pump and electronic water pump

Abstract

The utility model discloses a dry and wet shielding cover-driving circuit board mounting structure of an electronic water pump and the electronic water pump. The dry and wet shielding cover-driving circuit board mounting structure comprises a pump shell, a dry and wet shielding cover and a driving circuit board, when the dry-wet shielding cover is installed in the electric control cavity of the pump shell, the positioning-screw column of the pump shell is matched with the first positioning notch of the dry-wet shielding cover so as to position the dry-wet shielding cover, and the screw penetrates through the first screw hole of the dry-wet shielding cover and then is locked into the screw base of the pump shell so as to fix the dry-wet shielding cover. When the driving circuit board is installed in the electric control cavity of the pump shell, the screws penetrate through the second screw holes of the driving circuit board and then are locked into the positioning screw columns of the pump shell so as to fix the driving circuit board. The utility model mainly solves the problem of how to provide a mounting structure for the dry and wet shielding cover and the driving circuit board, provides a reasonable, stable and efficient positioning structure and mounting structure for the dry and wet shielding cover and the driving circuit board, simplifies the structure and the assembly process of the electronic water pump, and improves the reliability and the production efficiency.

Description

TECHNICAL FIELD

[0001] The utility model relates to electronic water pump and its spare part technical field, concretely is a kind of electronic water pump's dry-wet shield cover-drive circuit board mounting structure and electronic water pump. BACKGROUND

[0002] Electronic water pump has higher output efficiency and can realize accurate flow control, so electronic water pump is widely used in automobile, household appliance and industrial equipment, especially new energy automobile usually has two or even more electronic water pumps, and electronic water pump is the power source of the entire cooling system of new energy automobile, and the power battery, drive motor and the like of new energy automobile need to rely on electronic water pump to drive coolant circulation cooling.

[0003] Drive circuit board is one of the core components of electronic water pump, which is used to drive stator assembly to run to generate rotating magnetic field, and then drive rotor assembly and impeller to rotate;The drive circuit board is loaded with main control, power electronic device and necessary peripheral circuit, and generates a large amount of heat when energized, therefore, it is usually necessary to configure heat dissipation structure for the drive circuit board of electronic water pump.

[0004] The Chinese utility model patent announcement text with announcement number CN210564744U and the name of "a kind of internal liquid-cooled automobile electronic water pump", and the Chinese utility model patent announcement text with announcement number CN208396956U and the name of "a kind of electronic water pump", both disclose the structure and method for using liquid medium to dissipate heat for drive circuit board in electronic water pump.

[0005] In electronic water pump, if liquid medium is used to dissipate heat for drive circuit board, dry-wet shield cover needs to be relied on, specifically, a dry-wet shield cover of metal material needs to be set at the end of rotor cavity of electronic water pump, which is used to close rotor cavity, support and fix drive circuit board, and exchange heat between drive circuit board and liquid medium in rotor cavity, so that the heat generated by drive circuit board can be conducted into liquid medium in rotor cavity.

[0006] However, after adding dry-wet shield cover in electronic water pump, how to provide mounting structure for dry-wet shield cover needs to be considered, and how to provide mounting structure for drive circuit board also needs to be considered, if reasonable, stable and efficient mounting structure for dry-wet shield cover and drive circuit board cannot be provided, the performance, reliability and production efficiency of electronic water pump will be affected.

[0007] In summary, how to provide reasonable, stable and efficient mounting structure for dry-wet shield cover and drive circuit board of electronic water pump becomes one of the problems to be solved. UTILITY MODEL CONTENT

[0008] The utility model discloses a purpose lies in providing a kind of dry-wet shield cover-drive circuit board mounting structure and electronic water pump of electronic water pump, can provide reasonable, stable and efficient mounting structure for the dry-wet shield cover and drive circuit board of electronic water pump.

[0009] To achieve the above object, the utility model provides following technical scheme: a kind of dry-wet shield cover-drive circuit board mounting structure of electronic water pump, applied in electronic water pump;The electronic water pump at least includes pump shell, dry-wet shield cover and drive circuit board;Rotary chamber and electric control chamber are respectively provided in the pump shell, and, electric control chamber in the pump shell is formed with screw seat and positioning-screw column respectively;The mounting lug with first screw hole is formed at dry-wet shield cover respectively, and the first positioning gap matched with the positioning-screw column;Second screw hole is formed at least at the drive circuit board;When dry-wet shield cover is installed in the electric control chamber of the pump shell, the positioning-screw column of the pump shell cooperates with the first positioning gap of dry-wet shield cover, to position dry-wet shield cover, screw is locked into the screw seat in the pump shell after passing through the first screw hole of dry-wet shield cover, to fix dry-wet shield cover;The rotary chamber and electric control chamber of the pump shell are separated by dry-wet shield cover;When drive circuit board is installed in the electric control chamber of the pump shell, screw is locked into the positioning-screw column in the pump shell after passing through the second screw hole of drive circuit board, to fix drive circuit board.

[0010] In the above technical solution, positioning column is also formed in the electric control chamber of the pump shell;Second positioning gap matched with the positioning column is also formed at dry-wet shield cover;Positioning hole matched with the positioning column is also formed at the drive circuit board;When dry-wet shield cover is installed in the electric control chamber of the pump shell, the positioning column of the pump shell cooperates with the second positioning gap of dry-wet shield cover, to further position dry-wet shield cover;When drive circuit board is installed in the electric control chamber of the pump shell, the positioning column of the pump shell cooperates with the positioning hole of drive circuit board, to position drive circuit board.

[0011] In the above technical solution, the positioning column in the electric control chamber of the pump shell is formed with several, and is irregularly distributed along the circumferential direction of the electric control chamber;Correspondingly, the second positioning gap at dry-wet shield cover is also formed with several, and is irregularly distributed along the circumferential direction of the dry-wet shield cover;Correspondingly, the positioning hole at the drive circuit board is also formed with several, and is irregularly distributed along the circumferential direction of the drive circuit board.

[0012] In the technical scheme, the positioning column is sequentially arranged into a lower positioning section and an upper positioning section along its axial direction from the root, and the diameter of the lower positioning section is larger than that of the upper positioning section; the lower positioning section of the positioning column is matched with the second positioning notch of the dry-wet shielding cover; and the upper positioning section of the positioning column penetrates into the positioning hole of the driving circuit board.

[0013] In the technical scheme, the screw seats in the electric control chamber of the pump shell are formed in a plurality of numbers and are uniformly distributed along the circumferential direction of the electric control chamber; correspondingly, the mounting ears at the dry-wet shielding cover are also formed in a plurality of numbers and are uniformly distributed along the circumferential direction of the dry-wet shielding cover.

[0014] In the technical scheme, the electronic water pump further comprises a dry-wet shielding sleeve; the dry-wet shielding sleeve is fixed in the pump shell to shield the rotor chamber in the pump shell; the dry-wet shielding cover is formed with a joint end, and the joint end of the dry-wet shielding cover is jointed with the opening end of the dry-wet shielding sleeve to isolate the rotor chamber.

[0015] In the technical scheme, the driving circuit board can exchange heat with the dry-wet shielding cover.

[0016] The electronic water pump comprises the dry-wet shielding cover-driving circuit board mounting structure of the electronic water pump.

[0017] Compared with the prior art, the electronic water pump and the dry-wet shielding cover-driving circuit board mounting structure of the electronic water pump have the following beneficial effects: when the dry-wet shielding cover is mounted in the electric control chamber of the pump shell, the positioning-screw column of the pump shell is matched with the first positioning notch of the dry-wet shielding cover to position the dry-wet shielding cover; after the screw penetrates through the first screw hole of the dry-wet shielding cover, the screw is locked into the screw seat of the pump shell to fix the dry-wet shielding cover; when the driving circuit board is mounted in the electric control chamber of the pump shell, after the screw penetrates through the second screw hole of the driving circuit board, the screw is locked into the positioning-screw column of the pump shell to fix the driving circuit board; through the single positioning-screw column, the positioning of the dry-wet shielding cover and the fixation of the driving circuit board are realized; in addition, through the positioning column, the positioning of the dry-wet shielding cover and the driving circuit board and the support of the driving circuit board are realized; the electronic water pump and the dry-wet shielding cover-driving circuit board mounting structure of the electronic water pump can provide reasonable, stable and efficient positioning structure and mounting structure for the dry-wet shielding cover and the driving circuit board of the electronic water pump, simplify the structure and assembly process of the electronic water pump, and improve the reliability and production efficiency of the electronic water pump. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is a perspective view of the utility model.

[0019] Figure 2 It is a sectional view of the utility model.

[0020] The reference signs are: 1, pump shell; 11, screw seat; 12, positioning-screw column; 13, positioning column; 131, lower positioning section; 132, upper positioning section; 14, electric control chamber; 2, dry-wet shielding cover; 21, mounting ear; 221, first screw hole; 22, first positioning notch; 23, second positioning notch; 24, joint end; 3, driving circuit board; 31, second screw hole; 32, positioning hole; 4, dry-wet shielding sleeve; 41, rotor chamber. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0022] The embodiment provides a dry-wet shielding cover-driving circuit board mounting structure of an electronic water pump, which is applied to the electronic water pump and can provide a reasonable, stable and efficient mounting structure for the dry-wet shielding cover 2 and the driving circuit board 3 of the electronic water pump.

[0023] Please refer to Figure 1 and Figure 2 The electronic water pump at least comprises a pump shell 1, a dry-wet shielding cover 2 and a driving circuit board 3.

[0024] The pump shell 1 is an integrally injection molded structure, can be used to constitute the shell of the electronic water pump and provide a structural basis for the electronic water pump; the dry-wet shielding cover 2 is a plate-shaped member made of metal material (for example, aluminum alloy or stainless steel), which has good heat conduction performance; and the driving circuit board 3 is a printed circuit board (PCB), which is loaded with a main control, power electronic devices and necessary peripheral circuits and is used to drive the stator assembly to operate to generate a rotating magnetic field.

[0025] The pump shell 1 is provided with a rotor chamber 41 and an electric control chamber 14, wherein the electric control chamber 14 is located at one side of the pump shell 1 and is an internal space of the pump shell 1; and the electric control chamber 14 of the pump shell 1 is respectively formed with a screw seat 11 and a positioning-screw column 12, that is, the screw seat 11 and the positioning-screw column 12 are integrally injection molded in the electric control chamber 14 of the pump shell 1, and the screw seat 11 and the positioning-screw column 12 are provided with axial threaded holes.

[0026] The dry-wet shielding cover 2 is provided with a mounting lug 21 with a first screw hole 221 and a first positioning notch 22 matched with the positioning-screw column 12, which are structural features integrally formed on the dry-wet shielding cover 2, and the first positioning notch 22 is an arc-shaped notch.

[0027] The drive circuit board 3 is provided with at least a second screw hole 31, which is a through hole penetrating the drive circuit board 3 and is insulated.

[0028] When the dry-wet shielding cover 2 is installed in the electric control chamber 14 of the pump shell 1, the positioning-screw column 12 of the pump shell 1 is matched with the first positioning notch 22 of the dry-wet shielding cover 2 (specifically, the positioning-screw column 12 is clamped to the first positioning notch 22) to position the dry-wet shielding cover 2; and after the screw passes through the first screw hole 221 of the dry-wet shielding cover 2, the screw is locked into the screw seat 11 of the pump shell 1 to fix the dry-wet shielding cover 2.

[0029] The dry-wet shielding cover 2 separates the rotor chamber 41 and the electric control chamber 14 of the pump shell 1 from each other.

[0030] When the drive circuit board 3 is installed in the electric control chamber 14 of the pump shell 1, after the screw passes through the second screw hole 31 of the drive circuit board 3, the screw is locked into the positioning-screw column 12 of the pump shell 1 to fix the drive circuit board 3.

[0031] Further, the electric control chamber 14 of the pump shell 1 is provided with a positioning column 13 integrally injection molded therein; the dry-wet shielding cover 2 is further provided with a second positioning notch 23 matched with the positioning column 13, which is a structural feature integrally formed on the dry-wet shielding cover 2 and is an arc-shaped notch; the drive circuit board 3 is further provided with a positioning hole 32 matched with the positioning column 13, which is a through hole penetrating the drive circuit board 3 and is insulated; when the dry-wet shielding cover 2 is installed in the electric control chamber 14 of the pump shell 1, the positioning column 13 of the pump shell 1 is matched with the second positioning notch 23 of the dry-wet shielding cover 2 to further position the dry-wet shielding cover 2; and when the drive circuit board 3 is installed in the electric control chamber 14 of the pump shell 1, the positioning column 13 of the pump shell 1 is matched with the positioning hole 32 of the drive circuit board 3 to position the drive circuit board 3.

[0032] Further, the positioning posts 13 in the electric control chamber 14 of the pump shell 1 are formed in plurality and irregularly distributed along the circumferential direction of the electric control chamber 14; correspondingly, the second positioning notches 23 at the dry-wet shielding cover 2 are also formed in plurality and irregularly distributed along the circumferential direction of the dry-wet shielding cover 2; correspondingly, the positioning holes 32 at the driving circuit board 3 are also formed in plurality and irregularly distributed along the circumferential direction of the driving circuit board 3; the irregularly distributed plurality of positioning posts 13, second positioning notches 23 and positioning holes 32 can effectively position the dry-wet shielding cover 2 and the driving circuit board 3 during assembly, so as to avoid misassembly, reverse assembly or poor assembly of the dry-wet shielding cover 2 and the driving circuit board 3; in the embodiment, the positioning posts 13, second positioning notches 23 and positioning holes 32 are respectively provided in three groups.

[0033] Further, the positioning posts 13 in the electric control chamber 14 of the pump shell 1 are formed in plurality and irregularly distributed along the circumferential direction of the electric control chamber 14; correspondingly, the second positioning notches 23 at the dry-wet shielding cover 2 are also formed in plurality and irregularly distributed along the circumferential direction of the dry-wet shielding cover 2; correspondingly, the positioning holes 32 at the driving circuit board 3 are also formed in plurality and irregularly distributed along the circumferential direction of the driving circuit board 3; the irregularly distributed plurality of positioning posts 13, second positioning notches 23 and positioning holes 32 can effectively position the dry-wet shielding cover 2 and the driving circuit board 3 during assembly, so as to avoid misassembly, reverse assembly or poor assembly of the dry-wet shielding cover 2 and the driving circuit board 3; in the embodiment, the positioning posts 13, second positioning notches 23 and positioning holes 32 are respectively provided in three groups.

[0034] Further, the positioning posts 13 in the electric control chamber 14 of the pump shell 1 are formed in plurality and irregularly distributed along the circumferential direction of the electric control chamber 14; correspondingly, the second positioning notches 23 at the dry-wet shielding cover 2 are also formed in plurality and irregularly distributed along the circumferential direction of the dry-wet shielding cover 2; correspondingly, the positioning holes 32 at the driving circuit board 3 are also formed in plurality and irregularly distributed along the circumferential direction of the driving circuit board 3; the irregularly distributed plurality of positioning posts 13, second positioning notches 23 and positioning holes 32 can effectively position the dry-wet shielding cover 2 and the driving circuit board 3 during assembly, so as to avoid misassembly, reverse assembly or poor assembly of the dry-wet shielding cover 2 and the driving circuit board 3; in the embodiment, the positioning posts 13, second positioning notches 23 and positioning holes 32 are respectively provided in three groups.

[0035] Further, the electronic water pump further comprises a dry-wet shielding sleeve 4, which is a circular sleeve-shaped member made of metal or engineering plastic and having open ends; the dry-wet shielding sleeve 4 is fixed in the pump shell 1 to enclose a rotor chamber 41 in the pump shell 1, i.e. the inner cavity of the dry-wet shielding sleeve 4 is the rotor chamber 41; the dry-wet shielding cover 2 is formed with an engaging end 24, and the engaging end 24 of the dry-wet shielding cover 2 is engaged with the open end of the dry-wet shielding sleeve 4 to isolate the rotor chamber 41; in the embodiment, a sealing ring is arranged between the engaging end 24 of the dry-wet shielding cover 2 and the open end of the dry-wet shielding sleeve 4, so that the rotor chamber 41 is sealed.

[0036] Further, the drive circuit board 3 can exchange heat with the dry-wet shielding cover 2; in this embodiment, the drive circuit board 3 and the dry-wet shielding cover 2 are coated with thermal conductive silicone grease, so that the heat generated by the drive circuit board 3 can be conducted to the dry-wet shielding cover 2, and then conducted to the liquid medium in the rotor chamber 41 through the dry-wet shielding cover 2, thereby achieving rapid heat dissipation of the drive circuit board 3.

[0037] In the assembly of the electronic water pump of this embodiment, the dry-wet shielding cover 2 is multi-point positioned by the three positioning columns 13 and the single positioning-screw column 12 in cooperation with the three second positioning notches 23 and the single first positioning notch 22 on the dry-wet shielding cover 2, and the dry-wet shielding cover 2 is fixed by screwing the screws into the screw seats 11 of the pump shell 1 after the screws pass through the first screw holes 221 of the dry-wet shielding cover 2; the drive circuit board 3 is multi-point positioned by the upper positioning sections 132 of the three positioning columns 13 in cooperation with the three positioning holes 32 on the drive circuit board 3, and the drive circuit board 3 is supported by the end faces of the lower positioning sections 131 of the positioning columns 13 at this time, avoiding direct contact between the drive circuit board 3 and the dry-wet shielding cover 2, and the drive circuit board 3 is fixed by screwing the screws into the positioning-screw column 12 of the pump shell 1 after the screws pass through the second screw holes 31 of the drive circuit board 3.

[0038] This embodiment also provides an electronic water pump including the dry-wet shielding cover-drive circuit board mounting structure of the electronic water pump.

[0039] The dry-wet shielding cover-drive circuit board mounting structure of the electronic water pump of this embodiment and the electronic water pump, when the dry-wet shielding cover 2 is mounted in the electric control chamber 14 of the pump shell 1, the positioning-screw column 12 of the pump shell 1 cooperates with the first positioning notch 22 of the dry-wet shielding cover 2 to position the dry-wet shielding cover 2, and the dry-wet shielding cover 2 is fixed by screwing the screws into the screw seats 11 of the pump shell 1 after the screws pass through the first screw holes 221 of the dry-wet shielding cover 2; when the drive circuit board 3 is mounted in the electric control chamber 14 of the pump shell 1, the drive circuit board 3 is fixed by screwing the screws into the positioning-screw column 12 of the pump shell 1 after the screws pass through the second screw holes 31 of the drive circuit board 3; the positioning of the dry-wet shielding cover 2 and the fixation of the drive circuit board 3 are realized by the single positioning-screw column 12; in addition, the positioning of the dry-wet shielding cover 2 and the drive circuit board 3 and the support of the drive circuit board 3 are realized simultaneously by the positioning columns 13; this embodiment can provide a reasonable, stable and efficient positioning structure and mounting structure for the dry-wet shielding cover 2 and the drive circuit board 3 of the electronic water pump, simplifying the structure and assembly process of the electronic water pump and improving the reliability and production efficiency of the electronic water pump.

[0040] Although the embodiments of the present application have been shown and described, it is to be understood that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An electronic water pump dry-wet shield cover-driving circuit board mounting structure applied in an electronic water pump, characterized in that: the electronic water pump comprises at least a pump shell, a dry-wet shield cover and a driving circuit board; the pump shell is provided with a rotor chamber and an electric control chamber respectively, and the electric control chamber of the pump shell is formed with a screw seat and a positioning-screw column respectively; the dry-wet shield cover is formed with mounting ears with first screw holes and first positioning notches matched with the positioning-screw column; the driving circuit board is formed with at least second screw holes; when the dry-wet shield cover is mounted in the electric control chamber of the pump shell, the positioning-screw column of the pump shell is matched with the first positioning notches of the dry-wet shield cover to position the dry-wet shield cover, and screws are locked into the screw seat of the pump shell through the first screw holes of the dry-wet shield cover to fix the dry-wet shield cover; the dry-wet shield cover separates the rotor chamber and the electric control chamber of the pump shell from each other; when the driving circuit board is mounted in the electric control chamber of the pump shell, screws are locked into the positioning-screw column of the pump shell through the second screw holes of the driving circuit board to fix the driving circuit board.

2. The electronic water pump dry-wet shield cover-drive circuit board mounting structure according to claim 1, characterized by, the electric control chamber of the pump shell is further formed with a positioning column; the dry-wet shield cover is further formed with second positioning notches matched with the positioning column; the driving circuit board is further formed with positioning holes matched with the positioning column; when the dry-wet shield cover is mounted in the electric control chamber of the pump shell, the positioning column of the pump shell is matched with the second positioning notches of the dry-wet shield cover to further position the dry-wet shield cover; when the driving circuit board is mounted in the electric control chamber of the pump shell, the positioning column of the pump shell is matched with the positioning holes of the driving circuit board to position the driving circuit board.

3. The electronic water pump dry-wet shield cover-drive circuit board mounting structure according to claim 2, characterized by, the positioning column in the electric control chamber of the pump shell is irregularly distributed along the circumferential direction of the electric control chamber; correspondingly, the second positioning notches of the dry-wet shield cover are also irregularly distributed along the circumferential direction of the dry-wet shield cover; correspondingly, the positioning holes of the driving circuit board are also irregularly distributed along the circumferential direction of the driving circuit board.

4. The electronic water pump dry-wet shield cover-drive circuit board mounting structure according to claim 2 or 3, characterized by, the positioning column is sequentially configured with a lower positioning section and an upper positioning section along its own axial direction from the root, and the diameter of the lower positioning section is larger than that of the upper positioning section; the lower positioning section of the positioning column is matched with the second positioning notches of the dry-wet shield cover; the upper positioning section of the positioning column penetrates into the positioning holes of the driving circuit board.

5. The electronic water pump dry-wet shield cover-drive circuit board mounting structure according to any one of claims 1 to 3, characterized by, the screw seat in the electric control chamber of the pump shell is evenly distributed along the circumferential direction of the electric control chamber; correspondingly, the mounting ears of the dry-wet shield cover are also evenly distributed along the circumferential direction of the dry-wet shield cover.

6. The electronic water pump dry-wet shield cover-drive circuit board mounting structure according to claim 1, characterized by, the electronic water pump further comprises a dry-wet shield sleeve; the dry-wet shield sleeve is fixed in the pump shell to shield the rotor chamber in the pump shell; The dry-wet shielding cover is provided with a joint end, and the joint end of the dry-wet shielding cover is jointed with the opening end of the dry-wet shielding sleeve to isolate the rotor cavity.

7. The electronic water pump dry-wet shield cover-driving circuit board mounting structure according to claim 1 or 6, characterized by The driving circuit board can exchange heat with the dry-wet shielding cover.

8. An electronic water pump characterized by comprising: The dry-wet shielding cover-driving circuit board mounting structure comprises the electronic water pump of any one of claims 1-7.

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