Stator assembly component of brushless electronic water pump

Abstract

The utility model discloses a stator assembly component of a brushless electronic water pump, which comprises a stator iron core, a stator winding and a plastic stator shell, the stator iron core and the stator winding are embedded in the stator shell, a rotor assembly mounting cavity is arranged on the stator shell, a central shaft is embedded in the center of the rotor assembly mounting cavity, and a rotor assembly is arranged in the central shaft. A lower flange part matched with an upper cover of the water pump is further arranged at the upper end of the stator shell, a conductive support is fixed to the bottom of the stator shell, three stator connecting pieces and a grounding connecting piece are embedded in the conductive support, and the stator connecting pieces are connected with three-phase connecting pieces on a stator winding in a one-to-one correspondence mode; a lower cover is fixed at the lower end of the stator shell, a plug is arranged on the lower cover, and plug pins connected with the three stator connecting sheets and the grounding connecting sheet in a one-to-one correspondence manner are arranged in the plug. The stator assembly component is simpler in structure, the axial length is shortened, and the risk of sealing failure is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of a brushless electronic water pump, in particular to a stator assembly component of a brushless electronic water pump. Background Art

[0002] The current brushless electronic water pump uses the principle of electromagnetic conversion to drive the rotor impeller assembly to rotate, thereby achieving the output of coolant. The applicant has previously applied for a stator assembly of a brushless electronic water pump with application number 202221087721.7, which includes a plastic shell and a stator assembly fixed in the shell, the stator assembly includes a stator core, a stator winding and a plastic stator inner shell, and a grounding spring is squeezed between the stator core and the shell and in contact with the heat dissipation metal plate, so that grounding can be achieved while also conducting heat, and in order to dissipate heat for the PCBA board, a heat dissipation metal plate is fixed at the rear end of the stator assembly, and a PCBA board is set on the back of the heat dissipation metal plate.

[0003] However, the above scheme still has some technical problems: 1. The current water pump stator assembly is generally clamped from the outside of the stator core during injection molding, resulting in the outside of the water pump housing being provided with outwardly protruding ribs, which are formed by the stator core clamping fixture. In this way, the external dimensions of the overall water pump stator assembly are relatively large, and the ribs will also affect the subsequent fixation of the water pump; 2. The current stator assembly needs to be provided with a heat dissipation metal plate and a PCBA board at the rear end, resulting in a relatively long overall axial length, and in order to dissipate heat for the PCBA board, it is also necessary to The heat dissipation metal plate has some special structures. For example, a protruding ring and a heat dissipation protrusion need to be set on the heat dissipation metal plate. The protruding ring needs to be sealed with the stator inner shell. A through hole needs to be set on the stator inner shell to actively dissipate heat for the heat dissipation metal plate. Therefore, the above structure is relatively complicated, and the protruding ring needs to be sealed with the stator inner shell. Due to the long-term use and bumps of the electronic water pump in the car, there is a risk of failure of the seal between the protruding ring and the stator inner shell. Once the seal fails, the liquid in the electronic water pump is likely to flow into the PCBA board and cause a short circuit. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a stator assembly component of a brushless electronic water pump, the stator assembly component has a simpler structure, shortens the axial length, and avoids the risk of sealing failure.

[0005] In order to solve the above technical problems, the technical solution of the utility model is: a stator assembly component of a brushless electronic water pump, comprising a stator core, a stator winding and a plastic stator shell, the stator core and the stator winding are embedded in the stator shell, a rotor assembly mounting cavity is provided on the stator shell, a central axis is embedded in the center of the rotor assembly mounting cavity, a lower flange portion adapted to the upper cover of the water pump is further provided at the upper end of the stator shell, a conductive bracket is fixed to the bottom of the stator shell, three stator connecting plates and one grounding connecting plate are embedded in the conductive bracket, and the stator connecting plates are connected one-to-one with the three-phase connecting plates on the stator winding; a lower cover is fixed to the lower end of the stator shell, a connector is provided on the lower cover, and connector pins connected one-to-one with the three stator connecting plates and one grounding connecting plate are provided in the connector.

[0006] As a preferred solution, the conductive bracket includes a bracket plate made of an insulating material, the bracket plate is provided with a positioning hole, the outer periphery of the bracket plate is provided with a snap-in notch, the lower end of the stator housing is provided with a snap-in protrusion, a support step and a positioning column, the positioning column is inserted into the positioning hole, the snap-in protrusion is snapped into the snap-in notch, and the support step supports the plate surface of the bracket plate.

[0007] As a preferred solution, a reinforcement structure is provided on the upper plate surface of the bracket plate.

[0008] As a preferred solution, the reinforcement structure includes a plurality of reinforcement ribs arranged on the upper plate surface of the bracket plate.

[0009] As a preferred solution, the reinforcing ribs include an annular reinforcing rib arranged in the middle of the upper plate surface of the bracket plate and a plurality of radial reinforcing ribs connecting the annular reinforcing ribs, and the radial reinforcing ribs are evenly distributed relative to the center circumference of the annular reinforcing ribs.

[0010] As a preferred solution, the outer end of the stator connecting piece is configured as a bent section, and the bent section is in contact with the three-phase connecting piece and fixed by welding.

[0011] As a preferred solution, the positioning hole is arranged on the stator connecting plate.

[0012] As a preferred solution, a plurality of clamping cavities for supporting the stator core from the inside are arranged in the stator housing, and the lower part of the clamping cavity is through-connected and the upper end is a blind end.

[0013] As a preferred solution, a grounding spring sheet is embedded in the stator housing, one end of the grounding spring sheet is connected to the grounding connecting sheet, and the other end of the grounding spring sheet is in elastic contact with the stator core.

[0014] As a preferred solution, support columns are provided on both sides of the clamping protrusion, and the height of the support columns is lower than the height of the clamping protrusion, thereby forming the support step.

[0015] After adopting the above technical scheme, the effect of the utility model is as follows: since a conductive bracket is fixed to the bottom of the stator housing, three stator connecting plates and one grounding connecting plate are embedded in the conductive bracket, and the stator connecting plates are connected one-to-one with the three-phase connecting plates on the stator winding; a lower cover is fixed to the lower end of the stator housing, and a connector is provided on the lower cover, and connector pins connected one-to-one with the three stator connecting plates and one grounding connecting plate are provided in the connector. Therefore, the stator assembly component of this scheme does not include a PCBA board, and the three-phase connecting plates of the three-phase winding of the stator are directly connected to the external control of the automobile through the conductive bracket. In this way, the electronic water pump can be controlled to work only by docking with the external controller through the connector, which is more suitable for the current requirements of highly integrated control on automobiles, and since the stator assembly does not have a PCBA board and a heat dissipation metal plate, the stator assembly component structure is simpler, the overall axial size is smaller, and there is no risk of sealing failure.

[0016] Furthermore, since the conductive bracket includes a bracket plate made of an insulating material, a positioning hole is provided on the bracket plate, a clamping notch is provided on the outer periphery of the bracket plate, a clamping protrusion, a supporting step and a positioning column are provided on the lower end of the stator housing, the positioning column is inserted into the positioning hole, the clamping protrusion is clamped into the clamping notch, and the supporting step supports the board surface of the bracket plate. Therefore, the fixing of the conductive bracket is very convenient, and the conductive bracket can be effectively positioned by using the positioning column and the positioning hole, so that the three-phase connecting piece and the stator connecting piece can be accurately docked and connected, the supporting step can support the board surface of the bracket plate, and the clamping notch and the clamping protrusion cooperate with each other to further clamp and fix, and the assembly of this conductive bracket is simple and accurate.

[0017] Furthermore, since a reinforcement structure is arranged on the upper plate surface of the support plate, the reinforcement structure includes a plurality of reinforcement ribs arranged on the upper plate surface of the support plate, and the reinforcement structure can increase the strength of the support plate, and the reinforcement ribs are arranged on the upper plate surface, which can effectively utilize the space and does not increase the axial length of the entire stator assembly.

[0018] Furthermore, since the outer end of the stator connecting piece is configured as a bent section, the bent section contacts and is welded to the three-phase connecting piece, so the bent section can better contact the three-phase connecting piece and is more convenient for welding and fixing the two.

[0019] Furthermore, since the stator shell is provided with a plurality of clamping cavities for supporting the stator core from the inside, the lower part of the clamping cavity is through-connected and the upper end is a blind end, therefore, during the injection molding process of the stator assembly component, the stator core and the windings wound on the stator core need to be clamped in the injection molding cavity. At this time, the clamping fixture supports the clamping cavity formed after the stator core is injected from the inside to the outside, so that no convex ribs for avoiding the clamping fixture are formed on the outer surface of the stator shell, so that the size of the overall stator assembly component is more compact, and at the same time, the stator assembly has no convex ribs on the outer surface, which can be fixed more conveniently. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0021] Figure 1 This is a three-dimensional diagram of the structure after the lower cover is hidden in the embodiment of the utility model;

[0022] Figure 2 It is a stereogram of an embodiment of the utility model;

[0023] Figure 3 It is a bottom view of an embodiment of the utility model;

[0024] Figure 4 yes Figure 3 Sectional view at AA;

[0025] Figure 5 This is a three-dimensional picture after hiding the lower cover and the conductive bracket;

[0026] Figure 6 It is a three-dimensional diagram of the conductive bracket;

[0027] Figure 7 It is a three-dimensional image of the conductive bracket from another angle;

[0028] In the attached drawings: 1. stator housing; 11. lower flange; 12. rotor assembly mounting cavity; 13. clamping protrusion; 14. positioning column; 15. clamping cavity; 16. support column; 2. conductive bracket; 21. bracket plate; 22. stator connecting piece; 23. grounding connecting piece; 24. positioning hole; 25. bending section; 26. clamping notch; 27. annular reinforcing rib; 28. radial reinforcing rib; 3. lower cover; 4. connector; 41. connector pin; 5. center axis; 6. stator core; 7. grounding spring; 8. three-phase connecting piece. DETAILED DESCRIPTION

[0029] The present invention is further described in detail below through specific embodiments.

[0030] like Figures 1 to 7As shown, a stator assembly component of a brushless electronic water pump includes a stator core 6, a stator winding and a plastic stator housing 1. The stator core 6 and the stator winding are embedded in the stator housing 1. The stator winding is a three-phase winding. Each phase harness is connected to a three-phase connecting piece 8. The three-phase connecting piece 8 is also embedded in the stator housing 1 and extends downward to be exposed.

[0031] In this embodiment, a plurality of clamping cavities 15 are provided in the stator housing 1 to support the stator core 6 from the inside, and the lower part of the clamping cavity 15 is through and the upper end is a blind end. The clamping cavity 15 is formed during the injection molding of the stator housing 1. During the injection molding, the clamping fixture clamps the stator core 6 from the inside to the outside, so that there are no convex ribs on the outside of the stator housing 1, and the size of the overall stator housing 1 is also smaller.

[0032] The stator housing 1 is provided with a rotor assembly mounting cavity 12, the center of which is embedded with a central axis 5. The upper end of the stator housing 1 is also provided with a lower flange portion 11 adapted to the upper cover of the water pump. A conductive bracket 2 is fixed to the bottom of the stator housing 1, and three stator connecting plates 22 and one grounding connecting plate 23 are embedded in the conductive bracket 2. The stator connecting plates 22 are connected to the three three-phase connecting plates 8 on the stator winding in a one-to-one correspondence; a lower cover 3 is fixed to the lower end of the stator housing 1, and a connector 4 is provided on the lower cover 3. The connector 4 is provided with connector pins 41 connected to the three stator connecting plates 22 and one grounding connecting plate 23 in a one-to-one correspondence.

[0033] Among them, Figures 5 to 7 As shown, the conductive bracket 2 includes a bracket plate 21 made of an insulating material, a positioning hole 24 is provided on the bracket plate 21, a snap-fitting notch 26 is provided on the outer periphery of the bracket plate 21, and a snap-fitting protrusion 13, a supporting step and a positioning column 14 are provided at the lower end of the stator housing 1, the positioning column 14 is inserted into the positioning hole 24, the snap-fitting protrusion 13 is snapped into the snap-fitting notch 26, and the supporting step supports the plate surface of the bracket plate 21.

[0034] The upper and lower parts mentioned in this embodiment are the electronic water pumps according to Figure 4 The placement status is determined by the drawing. The one above the drawing is defined as upper, and the one below the drawing is defined as lower.

[0035] like Figure 5 As shown, in this embodiment, there are three clamping protrusions 13 at the lower end of the stator housing 1 and they are evenly distributed around the circumference, and there are also three support steps, which are two support columns 16 arranged on both sides of the clamping protrusion 13. The height of the support column 16 is lower than that of the clamping protrusion 13, thereby forming a support step. There are two positioning columns 14, and the corresponding positioning holes 24 are arranged on the stator connecting piece 22.

[0036] like Figure 7 As shown, in this embodiment, a reinforcement structure is provided on the upper plate surface of the bracket plate 21 .

[0037] The reinforcement structure includes a plurality of reinforcement ribs arranged on the upper plate surface of the support plate 21. The reinforcement ribs include an annular reinforcement rib 27 arranged in the middle of the upper plate surface of the support plate 21 and a plurality of radial reinforcement ribs 28 connected to the annular reinforcement rib 27. The radial reinforcement ribs 28 are evenly distributed relative to the central circumference of the annular reinforcement rib 27. In this embodiment, the number of radial reinforcement ribs 28 is three. Since the reinforcement ribs are arranged on the upper plate surface of the support plate 21, there is enough space between the bottom of the stator housing 1 and the upper plate surface of the support plate 21 to accommodate the reinforcement ribs, thereby effectively utilizing the space without increasing the axial length of the overall stator assembly.

[0038] The outer end of the stator connecting piece 22 is configured as a bent section 25 , and the bent section 25 is in contact with the three-phase connecting piece 8 and fixed by welding.

[0039] like Figure 4 As shown, a grounding spring piece 7 is embedded in the stator housing 1 , one end of the grounding spring piece 7 is connected to the grounding connecting piece 23 , and the other end is in elastic contact with the stator core 6 .

[0040] In actual use, the stator assembly component connector 4 can be directly plugged into the controller assembly outside the vehicle. The stator assembly component in this embodiment omits the PCBA board, and also omits the heat dissipation metal plate. There is no need for sealing between the stator housing and the heat dissipation metal plate, which reduces the risk of leakage. The overall stator assembly component is reduced in both axial and radial dimensions.

[0041] The above-described embodiments are merely descriptions of preferred implementations of the present invention and are not intended to limit the scope of the present invention. Various modifications and alterations to the technical solution of the present invention, without departing from the design spirit of the present invention, should fall within the scope of protection defined in the claims of the present invention.

Claims

1. A stator assembly component of a brushless electronic water pump, comprising a stator core, a stator winding and a plastic stator housing, wherein the stator core and the stator winding are embedded in the stator housing, a rotor assembly mounting cavity is provided on the stator housing, a central axis is embedded in the center of the rotor assembly mounting cavity, and a lower flange portion adapted to an upper cover of a water pump is further provided at the upper end of the stator housing, characterized in that: A conductive bracket is fixed to the bottom of the stator housing, and three stator connecting plates and one grounding connecting plate are embedded in the conductive bracket. The stator connecting plates are connected one-to-one with the three-phase connecting plates on the stator winding; a lower cover is fixed to the lower end of the stator housing, and a connector is provided on the lower cover. The connector has connector pins connected one-to-one with the three stator connecting plates and one grounding connecting plate.

2. The stator assembly component of a brushless electronic water pump according to claim 1, characterized in that: The conductive bracket includes a bracket plate made of insulating material, a positioning hole is provided on the bracket plate, a clamping notch is provided on the outer periphery of the bracket plate, a clamping protrusion, a supporting step and a positioning column are provided on the lower end of the stator housing, the positioning column is inserted into the positioning hole, the clamping protrusion is clamped into the clamping notch, and the supporting step supports the plate surface of the bracket plate.

3. A stator assembly component of a brushless electronic water pump as claimed in claim 2, characterized in that: A reinforcement structure is arranged on the upper plate surface of the bracket plate.

4. A stator assembly component of a brushless electronic water pump as claimed in claim 3, characterized in that: The reinforcement structure includes a plurality of reinforcement ribs arranged on the upper plate surface of the bracket plate.

5. The stator assembly component of a brushless electronic water pump according to claim 4, characterized in that: The reinforcing ribs include an annular reinforcing rib arranged in the middle of the upper plate surface of the bracket plate and a plurality of radial reinforcing ribs connecting the annular reinforcing ribs, and the radial reinforcing ribs are evenly distributed relative to the central circumference of the annular reinforcing ribs.

6. A stator assembly component of a brushless electronic water pump as claimed in claim 5, characterized in that: The outer end of the stator connecting piece is configured as a bent section, and the bent section contacts and is welded and fixed to the three-phase connecting piece.

7. The stator assembly component of a brushless electronic water pump according to claim 2, characterized in that: The positioning hole is arranged on the stator connecting piece.

8. The stator assembly component of a brushless electronic water pump according to claim 1, characterized in that: The stator housing is provided with a plurality of clamping cavities for supporting the stator core from the inside, the lower part of the clamping cavity is through and the upper end is a blind end.

9. The stator assembly component of a brushless electronic water pump according to claim 1, characterized in that: A grounding spring is embedded in the stator housing, one end of the grounding spring is connected to the grounding connecting piece, and the other end is in elastic contact with the stator core.

10. The stator assembly component of a brushless electronic water pump according to claim 2, characterized in that: Support columns are arranged on both sides of the clamping protrusion, and the height of the support columns is lower than the height of the clamping protrusion, thereby forming the support step.

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