Manufacturing mold of electric pump

Abstract

The invention provides a manufacturing mold of an electric pump. The manufacturing mold comprises a first injection mold, and the first injection mold comprises a first mold core part and a runner plate part; the first mold core parts are used for limiting part of the pressure surface of the first twisted blade, at least two of the first mold core parts are in sliding connection with the runner plate part, a first direction and a second direction are defined, the first direction is parallel to the height direction of the manufacturing mold, and the second direction is perpendicular to the first direction; the runner plate part can move in the first direction, and when the runner plate part moves in the first direction, the runner plate part can drive the at least two first mold core parts to move in the first direction and the second direction at the same time. In this way, when the runner plate part moves, the at least two first mold core parts can move in a linkage mode, and compared with the mode that core pulling is conducted on the first mold core parts independently, the beats for manufacturing the electric pump can be reduced.

Description

Technical Field

[0001] This application relates to the field of thermal management technology, and more particularly to a manufacturing mold for an electric pump used in vehicles, energy storage, or commercial applications. Background Technology

[0002] As a crucial power component within the automotive thermal management system, electric pumps face increasingly stringent cooling requirements due to the advancement of electric vehicle technology. This places higher demands on the hydraulic efficiency of electric pumps. Electric pumps comprise impeller assemblies, and to improve their hydraulic efficiency, the impeller blades are typically designed with three-dimensional curved surfaces, also known as twisted blades. Currently, the manufacturing molds for twisted blades are quite complex, resulting in a longer processing cycle for electric pumps. Summary of the Invention

[0003] The purpose of this invention is to provide a mold for manufacturing electric pumps, which helps to reduce the manufacturing cycle time of electric pumps.

[0004] To achieve the above objectives, one technical solution of this application is as follows: a manufacturing mold for an electric pump, the manufacturing mold including a first injection mold, the first injection mold including a first mold core and a runner plate; the first mold core is used to define the pressure surface of a portion of the first torsion blades, the first mold core includes a plurality of first mold cores, at least two of the plurality of first mold cores are slidably connected to the runner plate, a first direction and a second direction are defined, the first direction is parallel to the height direction of the manufacturing mold, the second direction is perpendicular to the first direction, the runner plate can move along the first direction, when the runner plate moves along the first direction, the runner plate can drive at least two first mold cores to move simultaneously along the first direction and the second direction.

[0005] In this technical solution, at least two first mold cores move in tandem while the flow channel plate moves. Compared to the method of pulling the first mold cores individually, this helps to reduce the cycle time of manufacturing electric pumps. Attached Figure Description

[0006] Figure 1 This is a three-dimensional schematic diagram of the electric pump of this application.

[0007] Figure 2 yes Figure 1 A schematic diagram of the structure along section XX.

[0008] Figure 3 yes Figure 2 A cross-sectional view of the rotating component.

[0009] Figure 4 yes Figure 2 Schematic diagram of the exploded structure of the rotating component.

[0010] Figure 5 yes Figure 2 The first part is a three-dimensional diagram in one direction.

[0011] Figure 6 yes Figure 2 A three-dimensional diagram of the first part from another direction.

[0012] Figure 7 yes Figure 6 The first part of the structure is shown in frontal view along the X direction.

[0013] Figure 8 yes Figure 5 Schematic diagram of the first part along the BB section.

[0014] Figure 9 yes Figure 2 The second part is a three-dimensional diagram in one direction.

[0015] Figure 10 yes Figure 9 A schematic diagram of the second part of the structure viewed from the front along the Y direction.

[0016] Figure 11 yes Figure 2 A schematic diagram of the first and second torsion blades projected onto the downward plate.

[0017] Figure 12 yes Figure 3 A three-dimensional structural diagram of the first injection mold forming the first part in one direction.

[0018] Figure 13 yes Figure 12 A three-dimensional structural diagram of the first injection mold with the front mold removed in one direction.

[0019] Figure 14 yes Figure 12 A three-dimensional structural diagram of the front mold of the first injection mold in one direction.

[0020] Figure 15 yes Figure 12 A frontal view of the first injection mold in one direction.

[0021] Figure 16 yes Figure 15 Schematic diagram of the structure along the CC section.

[0022] Figure 17 yes Figure 12 A schematic diagram of the structure along the core of the first mold in one direction.

[0023] Figure 18 yes Figure 12 A schematic diagram of the structure of the second mold core in one direction.

[0024] Figure 19 yes Figure 1 A three-dimensional structural diagram of the manufacturing mold for the electric pump in one direction.

[0025] Figure 20 yes Figure 19 Schematic diagram of the DD cross-section structure.

[0026] Figure 21 yes Figure 19 A three-dimensional structural diagram showing the combination of the middle runner plate and the first mold core in one direction.

[0027] Figure 22 yes Figure 21 A three-dimensional structural diagram showing the middle support unit combined with the first mold core unit in one direction.

[0028] Figure 23 yes Figure 22 A schematic diagram of a three-dimensional structure supporting a component in one direction.

[0029] Figure 24 yes Figure 23 Schematic diagram of the cross-sectional structure along the EE.

[0030] Figure 25 yes Figure 19 A three-dimensional structural diagram showing the combination of the middle runner plate, the front mold, the first mold core, and the welding groove core in one direction.

[0031] Figure 26 yes Figure 25 Enlarged structural diagram at point I.

[0032] Figure 27 yes Figure 19 A three-dimensional structural diagram showing the combination of the middle runner plate, the front mold (with the base of the front mold removed), the first mold core, and the welding groove core in one direction.

[0033] Figure 28 yes Figure 19 A three-dimensional structural diagram showing the combination of the middle mold body, guide part, rear mold and second mold core in one direction.

[0034] Figure 29 yes Figure 28 A three-dimensional structural diagram showing the combination of the central guide section and the second mold core section in one direction.

[0035] Figure 30 yes Figure 29 Schematic diagram of the cross-sectional structure along the FF line. Attached image description:

[0037] 100. Electric pump; 11. Pump cover; 111. Inlet; 112. Outlet;

[0038] 12. Stator assembly; 121. Stator housing; 122. Stator winding;

[0039] 13. Inner cavity; 131. Rotor cavity; 132. Impeller cavity;

[0040] 14. Rotating assembly; 141. Rotor assembly; 1411. Rotor; 1412. First bearing; 1413. Second bearing; 1413a. End surface; 1413b. Outer peripheral surface; 1414. Outer peripheral surface; 142. Impeller assembly; 1421. Upper plate; 1421a. First hole; 1422. Lower plate; 1422a. Inner surface; 1422b. Outer surface; 1422c. First sub-inner surface; 1422d. Second sub-inner surface; 1422e. Peripheral side surface; 1423. First twisted blade; 1423a. First head; 1423b. First... Tail section; 1423c, pressure surface; 1423d, suction surface; 1423e, top; 1423f, root; 1423g, long upper edge curve; 1423h, long lower edge curve; 1424, second twisted blade; 1425, impeller inlet; 1426, impeller outlet; 1427, impeller fluid passage; 1424b, second tail section; 1424a, second head section; 1424c, short upper edge curve; 1424d, short lower edge curve; 143, first assembly; 144, first part; 1441, first hole; 145, second part; 19, control panel assembly;

[0041] 102. First circumference; 103. Second circumference; A. First point; B. Second point; β1. Angle at which the first point is placed; β2. Angle at which the second point is placed; C. Third point; D. Fourth point; 104. Third circumference; 105. Fourth circumference;

[0042] 20. First injection mold; 201. First mold core; 2011. First forming part; 2012. Second forming part; 202. Second mold core; 2021. Mold core part one; 2022. Mold core part two; 203. Front mold; 2031. Front mold part one; 2032. Front mold part two; 204. Rear mold; 2041. Forming part one; 2042. Forming part two; 2043. Forming part three;

[0043] 200. Manufacturing mold; 2023. Limiting groove; 2033. Front mold base; 2033a. Second slide groove; 2034. Welding groove core; 2035. Mold forming part; 2035a. Guide groove; 2044. Third slide groove; 2045. Rear mold forming part; 2046. Rear mold base; 205. Runner plate part; 2051. Support part; 2052. Runner plate base; 2051a. First slide groove; 206. Mold locking part; 207. Inlet plate part; 207a. Inlet; 208. Mold body part; 209. Guide part; 209a. Vertical part; 209b. Inclined part; 101. First direction; 1002. Second direction. Detailed Implementation

[0044] The present invention will be further described below with reference to the accompanying drawings and specific technical solutions:

[0045] The electric pump in the following embodiments can provide flow power for the working medium of the automotive thermal management system. The working medium can be water or an aqueous solution, such as an aqueous solution containing 50% ethylene glycol, or other substances.

[0046] See Figures 1 to 18As shown, this application provides an electric pump 100, which includes a pump cover 11, a stator assembly 12, a rotating assembly 14, and a shaft. The stator assembly 12 includes a stator winding 122 and a stator housing 121. The stator winding 122 includes a stator core, an insulating frame, and windings. The pump cover 11 is sealed and fixedly connected to the stator assembly 12. It should be noted that the sealing and fixing here means that when the electric pump 100 is working, the working medium inside the electric pump 100 will not leak to the outside of the electric pump 100 through the joint surface between the pump cover 11 and the stator assembly 12. The shaft is fixedly connected to the stator assembly 12. Specifically, the shaft is injection molded and fixed to the stator housing 121. It can be understood that part of the shaft is embedded in the stator housing 121. The electric pump 100 has an inner cavity 13, and the rotating assembly 14 is located in the inner cavity 13. The inner cavity 13 includes a rotor cavity 131 and an impeller cavity 132, which are connected. The inner cavity 13 allows the flow of a working medium. The rotating assembly 14 includes a rotor assembly 141 and an impeller assembly 142. The rotor assembly 141 includes a rotor 1411. At least a portion of the rotor assembly 141 is located in the rotor cavity 131, and the impeller assembly 142 is located in the impeller cavity 132. In one specific embodiment, the other end of the shaft is at least partially located within the rotor cavity 131, at least a portion of the rotating assembly 14 is sleeved on the outer periphery of the shaft, and a portion of the shaft is fixed to the stator housing 121. The rotating assembly 14 can rotate around the shaft. Of course, as another embodiment, the rotating assembly 14 and the shaft are fixedly connected, and the shaft rotates together with the rotating assembly 14. The electric pump 100 may also include a control board assembly 19, which is electrically connected to the stator assembly 12. As another embodiment, the electric pump 100 may not include the control board assembly 19, which is integrated into an external structure, thus facilitating the miniaturization design of the electric pump 100. In this embodiment, the electric pump 100 includes the control board assembly 19. The pump cover 11 has an inlet 111 and an outlet 112. The inlet 111 is for the working medium to flow into the electric pump 100, and the outlet 112 is for the working medium to flow out of the electric pump 100. When the electric pump 100 is working, it is connected to an external power source. By controlling the current in the stator winding 122, the excitation magnetic field generated by the stator winding 122 is controlled. Under the action of the excitation magnetic field, the rotating assembly 14 rotates around its shaft, causing the working medium that enters the inner cavity 13 through the inlet 111 to rotate with the rotating assembly 14. Under the action of centrifugal force, the working medium leaves the electric pump 100 through the outlet 112. It should be noted that the axial direction of the electric pump 100 described below refers to the direction in which the shaft of the electric pump extends, and the radial direction of the electric pump is the direction perpendicular to the axial direction of the electric pump. For ease of description, the axial direction of the electric pump is the direction in which the shaft extends, and the radial direction of the electric pump is the direction perpendicular to the axial direction of the electric pump.

[0047] As a crucial power component within the automotive thermal management system, electric pumps face increasingly stringent cooling requirements due to the advancements in electric vehicle technology. This places higher demands on the hydraulic efficiency of electric pumps. Electric pumps include impeller assemblies, which are typically designed as three-dimensional curved surfaces, or twisted blades, to improve hydraulic efficiency. The closer the twisted blade is to the inlet, the greater the difference in blade angle between the upper and lower edge curves, resulting in greater blade twist. Twisted blades near the inlet are also more difficult to manufacture. If the entire blade is twisted, the manufacturing difficulty of the electric pump increases significantly. Currently, multiple twisted blades are often individually formed and then welded to the upper and lower plates separately, making the manufacturing process quite complex. It should be noted that the long or short upper edge curves mentioned here and below refer to the curves formed by the connection between the suction or pressure surface of the twisted blade and the upper plate, while the long or short lower edge curves refer to the curves formed by the connection between the suction or pressure surface of the twisted blade and the lower plate. The blade angle is the angle between the tangent direction at a point on the twisted blade and the tangent direction of the circumference; it can be understood as the placement angle.

[0048] As one implementation method, please refer to Figures 1 to 18 As shown, an electric pump 100 includes a rotating assembly 14, which includes an impeller assembly 142 and a rotor assembly 141. The rotor assembly 141 includes a rotor 1411. The impeller assembly 142 is formed by insert injection molding at least on the rotor 1411. The impeller assembly 142 includes a plurality of first twisted blades 1423, a plurality of second twisted blades 1424, an upper plate 1421, and a lower plate 1422. The first twisted blades 1423 and the lower plate 1422 are integral structural components, and the second twisted blades 1424 and the upper plate 1421 are integral structural components. The structure formed by the first twisted blades 1423 and the lower plate 1422 is defined as a first part 144, and the structure formed by the second twisted blades 1424 and the upper plate 1421 is defined as a second part 145. The first part 144 and the second part 145 are welded together. In this way, firstly, the assembly of the impeller assembly 142 can be completed with only one welding, which simplifies the manufacturing steps of the electric pump 100.

[0049] For a specific implementation method, please refer to Figures 1 to 11As shown, the rotating assembly 14 includes a first bearing 1412 and a second bearing 1413. A first assembly 143 is formed by injection molding using the first bearing 1412 and the rotor 1411 as inserts. A first part 144 is formed by injection molding the first assembly 143 and the second bearing 1413. The first part 144 includes a first twisted blade 1423 and a lower plate 1422. The first twisted blade 1423 and the lower plate 1422 are injection molded and fixed, meaning they are essentially an integral structural component. The first part 144 also includes a rotor assembly 141. The rotor assembly 141, the first twisted blade 1423 of the impeller assembly 142, and the lower plate 1422 of the impeller assembly 142 are all integral structural components. This method of designing the rotor assembly 141, the first twisted blade 1423 of the impeller assembly 142, and the lower plate 1422 of the impeller assembly 142 as an integral structural component improves the structural strength of the rotating assembly 14. Specifically, the outer peripheral surface 1414 of the rotor assembly 141 extends along the axial direction of the electric pump 100 to the lower plate 1422. This simplifies the injection mold for forming the rotor assembly 141.

[0050] As a specific implementation method, please refer to Figures 1 to 11 As shown, the first part 144 includes a first hole 1441 extending from the inner surface 1422a to the outer surface 1422b in a direction parallel to the axial direction of the electric pump 100, and extending to the end surface 1413a of the second bearing 1413. It can be understood that the wall portion corresponding to the first hole 1441 includes the end surface 1413a of the second bearing 1413. The radial dimension of the first hole 1441 in the electric pump 100 is larger than the radial dimension of the outer peripheral surface 1413b of the second bearing 1413 in the electric pump. It can be understood that the diameter of the first hole 1441 is larger than the diameter of the outer peripheral surface 1413b of the second bearing 1413. The first twisted blade 1423 includes a first head 1423a, a first tail 1423b, a pressure surface 1423c, a suction surface 1423d, a top 1423e, and a root 1423f. The first head 1423a is near the impeller inlet 1425, the first tail 1423b is near the impeller outlet 1426, the root 1423f is injection molded to the lower plate 1422, and the top 1423e is welded to the upper plate 1421. Specifically, the suction surface is a concave curve, and the pressure surface is a convex curved surface.

[0051] The upper plate 1421 includes a second hole 1421a. The radial value of the second hole 1421a in the electric pump is greater than that of the first hole 1441 in the electric pump. The top 1423e of the first head 1423a extends to the wall corresponding to the second hole 1421a and fits against the wall corresponding to the second hole 1421a. This helps to prevent a reduction in the working medium entering the impeller flow channel 1427, thereby improving the hydraulic efficiency of the electric pump 100. A portion of the first head 1423a is located within the second hole 1421a, allowing the fluid entering the impeller assembly 142 to enter the impeller flow channel 1427 more smoothly, increasing the inlet area, reducing the fluid inlet velocity, preventing cavitation, and reducing vibration. Specifically, the first head 1423a is located in the second hole 1421a, and the top 1423e of the first head 1423a is in contact with the wall corresponding to the second hole 1421a, and the root 1423f of the first head 1423a extends to the wall corresponding to the second hole 1421a.

[0052] As one implementation method, please refer to Figures 1 to 11As shown, an electric pump 100 includes an impeller assembly 142. The impeller assembly 142 includes a plurality of first twisted blades 1423, an upper plate 1421, and a lower plate 1422. At least a portion of the first twisted blades 1423 are located between the upper plate 1421 and the lower plate 1422. The plurality of first twisted blades 1423 are arranged in a circumferential array along the lower plate 1422. Each first twisted blade 1423 includes a first head 1423a and a first tail 1423b. The first head 1423a is closer to the center of the impeller assembly 1422 than the first tail 1423b, defining the first twisted blade. The curve connecting blade 1423 and upper plate 1421 is the long upper edge curve 1423g, and the curve connecting the first twisted blade 1423 and lower plate 1422 is the long lower edge curve 1423h. The intersection of the long upper edge curve 1423g and the first head 1423a is defined as the first point A, and the intersection of the long lower edge curve 1423h and the first head 1423a is defined as the second point B. The first point A is located on the first circumference 102, and specifically, the second point B is located on the second circumference 103. Both the first circumference 102 and the second circumference 103 are concentric with the circumference of the circumferential side surface 1422e of the lower plate 1422. The ratio of the diameters of the first circumference 102 to the second circumference 103 is 1.3 to 1.7, and the ratio of the placement angle β1 of the first point A to the placement angle β1 of the second point B is 1.2 to 1.6. In this way, firstly, the working medium enters the electric pump along the axial direction and then flows out along the radial direction. As the working medium transitions from the axial to the radial direction, the first head facilitates flow guidance. Optimizing the torsion of at least the first head—that is, optimizing the first circumference where the first point is located, the second circumference where the second point is located, the placement angle of the second point, and the placement angle of the second point—increases the area at the beginning of the impeller fluid passage, which is equivalent to the impeller inlet area. This helps reduce the flow velocity of the working medium at the beginning of the impeller fluid passage, thereby reducing localized cavitation at the impeller inlet. Secondly, this method, while reducing cavitation, also helps reduce vibration and pump noise. In this embodiment, only the blade angle at the intersection of the long upper edge curve 1423g and the first tail 1423b is the same as the blade angle at the intersection of the long lower edge curve 1423g and the first tail 1423b. Except for these two points, the blade angles of the other long upper and lower edge curves are different. This is beneficial for the manufacturing and processing of the impeller assembly. In this embodiment, the placement angle β1 of the first point A is 35° to 45°, and the diameter of the first circumference 102 ranges from 16mm to 20mm. This further reduces cavitation at the impeller inlet.

[0053] As one implementation method, please refer to Figures 1 to 11As shown, the impeller assembly 142 includes a plurality of second twisted blades 1424, at least some of which are located between the upper plate 1421 and the lower plate 1422. The plurality of second twisted blades 1424 are distributed in a circumferential array along the upper plate 1421. The number of first twisted blades 1423 and second twisted blades 1424 is equal. Specifically, the degree of twist of the first twisted blades 1423 and the second twisted blades 1424 is the same. It can be understood that, for the same circumferential diameter, the first twisted blades 1423 and the second twisted blades 1424 have the same placement angle. This is beneficial for increasing the area of ​​the impeller fluid passage, reducing cavitation within the impeller fluid passage, and thus improving the hydraulic efficiency of the electric pump. The second twisted blade 1424 is located between two adjacent first twisted blades 1423. The length of the second twisted blade 1424 is less than the length of the first twisted blade 1423. The second twisted blade 1424 includes a second head 1424a and a second tail 1424b. The second head 1424a is closer to the center of the impeller assembly 142 than the second tail 1424b. The first head 1423a is closer to the center of the impeller assembly 142 than the second head 1424a. The curve connecting the second twisted blade 1424 to the upper plate 1421 is defined as the short upper edge curve 1424c, and the curve connecting the second twisted blade 1424 to the lower plate 1422 is defined as the short lower edge curve 1424d. At least part of the short upper edge curve 1424c is different from the short lower edge curve 1424d. In this manner, the first head 1423a is positioned closer to the center of the impeller assembly 142 than the second head 1424a. The first head 1423a and the second head 1424a are staggered, which, compared to both heads being positioned close to the center of the impeller assembly simultaneously, increases the impeller inlet area, reduces the risk of cavitation at the impeller inlet, and improves pump efficiency. In this embodiment, the short upper edge curve is the curve formed by the connection between the suction surface of the second twisted blade and the upper plate, and the short lower edge curve is the curve formed by the connection between the suction surface of the second twisted blade and the lower plate. The suction surface of the second twisted blade is a concave curved surface, and the pressure surface is a convex curved surface. Only the blade angle at the intersection of the short upper edge curve 1424c and the second tail 1424b differs from the blade angle at the intersection of the short lower edge curve 1424d and the second tail 1424b. Apart from these two points, the blade angles of the other short upper and lower edge curves are different, which facilitates the manufacturing and processing of the impeller assembly.

[0054] As one implementation method, please refer to Figures 1 to 11As shown, the second twisted blade 1424 is injection molded and fixed to the upper plate 1421. There are multiple second twisted blades 1424, and the blade angles of the long upper edge curve 1423g and the long lower edge curve 1423h of the multiple second twisted blades 1424 are different. The second head 1424a of the second twisted blade 1424 is located radially outside the wall corresponding to the second hole 1421a, and the length of the second twisted blade 1424 is less than the length of the first twisted blade 1423. This further reduces local cavitation at the blade inlet and increases the pump efficiency. The top 1423e of the second twisted blade 1424 is welded and fixed to the lower plate 1422.

[0055] For a specific implementation method, please refer to Figures 1 to 11 As shown, in this technical solution, there are 4 first twisted blades and 4 second twisted blades. The 4 second twisted blades and 4 first twisted blades are staggered along the circumferential direction of the electric pump. The second twisted blades divide the impeller flow channel into two parts, which facilitates the processing and manufacturing of the first twisted blades and the second twisted blades. Figure 11 This is a schematic diagram showing the projection of the second twisted blade 1424 and the first twisted blade 1421 onto the plane containing the lower plate 1422.

[0056] As one implementation method, please refer to Figures 1 to 8 As shown, the first twisted blade 1423 includes a first head 1423a, a first tail 1423b, a long upper edge curve 1423g connecting to the upper plate 1421, and a long lower edge curve 1423h connecting to the lower plate 1422. The blade angles of the long upper edge curve 1423g and the long lower edge curve 1423h are different. In this way, the multiple first twisted blades 1423 are in a twisted state throughout the blade, which helps to improve the hydraulic efficiency of the electric pump 100.

[0057] As one implementation method, please refer to Figures 1 to 11 As shown, the intersection of the short upper edge curve 1424c and the second head 1424a is defined as the third point C, and the intersection of the short lower edge curve 1424d and the second head 1424a is defined as the fourth point D. The third point C is located on the third circumference 104, and the fourth point D is located on the fourth circumference 105. Both the third circumference 104 and the fourth circumference 105 are concentric with the circumference of the circumferential side surface of the upper plate 1421. The ratio of the diameter of the first circumference 102 to the diameter of the third circumference 102 is 0.4 to 0.8, and the ratio of the diameter of the second circumference 102 to the diameter of the fourth circumference 105 is 0.3 to 0.6. This method facilitates the guidance of the working medium in the impeller fluid channel, and by setting the working medium in the impeller fluid channel at this location for diversion, it helps to reduce eddies.

[0058] This application also discloses a method for manufacturing an electric pump 100: Please refer to Figures 1 to 30As shown, at least a first part 144, including at least a plurality of first torsion blades 1423 and a lower plate 1422, is injection molded using a rotor 1411 as an insert; a second part 145, including at least a plurality of second torsion blades 1424 and an upper plate 1421, is injection molded; and the first part 144 and the second part 145 are welded together. In this way, the first torsion blades 1423 are formed in the first part 144, the second torsion blades 1424 are formed in the second part 145, and the first part 144 and the second part 145 are welded together to form the impeller assembly 142. This structure requires only one welding to complete the assembly of the impeller assembly 142, which improves the efficiency of the electric pump 100 and simplifies the manufacturing steps of the electric pump 100.

[0059] As one implementation method, the first part 144 is formed using the first injection mold 20, and the manufacturing method includes:

[0060] The first mold core 201 and the second mold core 202 jointly define the pressure surface 1423c of the first twist blade 1423 and the first sub-inner surface 1422c of the lower plate 1422; the front mold 203 defines the suction surface 1423d of the first twist blade 1423 and the second sub-inner surface 1422d of the lower plate 1422. In this way, the first part 144 formed by an injection mold 20 is processed by the combination of the first mold core 201 and the second mold core 202 to form the pressure surface 1423c and the first sub-inner surface 1422c of the lower plate 1422, which helps to simplify the structure of the first injection mold 20.

[0061] The first injection mold 20 will be described in detail below: Please refer to... Figures 1 to 18As shown, the first injection mold 20 includes a front mold 203, a first mold core 201, a second mold core 202, and a rear mold 204. The second mold core 202 is located above the rear mold 204, which defines the outer peripheral surface 1414 of the rotor assembly 141, the outer surface 1422 of the lower plate 1422, and the peripheral side surface 1422e of the lower plate 1422. Specifically, the rear mold 204 includes a forming part 2041, a forming part 2042, and a forming part 2043. The forming part 2041 forms the outer peripheral surface 1414 of the rotor assembly 141, the forming part 2042 forms the outer surface 1422 of the lower plate 1422, and the forming part 2043 forms the peripheral side surface 1422e of the lower plate 1422. This design helps to improve the structural strength of the rotating assembly 14. The front mold 203 is located above the rear mold 204. The second mold core 201 includes multiple parts and is inserted between the front mold 203 and the rear mold 204 along the radial direction of the first injection mold 20, which can be understood as the second direction described below. The second mold core 202 is used to define the second pressure surface 1423c of the first twist blade 1423. Specifically, the second mold core 202 includes a mold core part 2021, which is used to define the second pressure surface 1423c of the first twist blade 1423. The mold core part 2022 is used to define a portion of the first sub-inner surface. The front mold 203 is used to define the suction surface 1423d of the first twist blade 1423 and the second sub-inner surface 1422d of the lower plate 1422. Specifically, the front mold 203 includes a front mold part 2031 and a front mold part 2032. The front mold part 2031 is used to define the suction surface 1423d of the first twist blade 1423, and the front mold part 2032 is used to define the second sub-inner surface 1422d of the lower plate 1422.

[0062] The number of first mold cores 201 matches the number of first twist blades 1423. The first mold cores 201 are obliquely inserted into the front mold 203, defining the first sub-pressure surface 1423p of the first twist blade 1423 near the first head 1423a. After injection molding, the first mold cores 201 are moved out along a direction with a predetermined acute angle to the axis of the electric pump 100. Specifically, the first mold core 201 includes a first forming part 2011 and a second forming part 2012. The first forming part 2011 defines the first sub-pressure surface 1423p of the first twist blade 1423 near the first head 1423a; the second forming part 2012 defines a portion of the first sub-inner surface 1422c of the lower plate 1422. This facilitates miniaturization of the first injection mold 20 along its radial direction. After the first 144 injection molding parts are completed, the first mold core 201 moves out along an acute angle intersecting the axial direction of the first injection mold 20. Then, the front mold 203 separates from the rear mold 204, and the second mold core 202 moves out along the radial direction of the first injection mold 20. The first part 144 then separates from the rear mold 204. This method facilitates the manufacturing of the electric pump 100. It should be noted that the axial direction of the first injection mold 20 is parallel to the axis of the first part 144, and the radial direction of the first injection mold 20 is perpendicular to its axial direction.

[0063] Specifically, as one implementation method, please refer to Figures 1 to 18 As shown, the first mold core 201 defines the first pressure surface 1423c of the first twisted blade 1423 near its head; after injection molding, the first mold core 201 moves out along a direction with a predetermined acute angle to the axis of the electric pump 100. The second mold core 202 defines the second pressure surface 1423c of the first twisted blade 1423; after injection molding, the second mold core 202 moves out along the radial direction of the first injection mold. After injection molding, the first mold core 201 moves out, the front mold 203 moves away from the second mold core 202, and the second mold core 202 moves out. The rear mold 204 defines the outer peripheral surface 1414 of the rotor assembly 141, the outer surface 1422b of the lower plate 1422, and the peripheral side surface 1422e of the lower plate 1422. The blade angle of the long upper edge curve 1423g and the long lower edge curve 1423h of the blade portion of the first tail 1423b of the first twisted blade 1423 is the same. The blade angles of the long upper edge curve 1423g and the long lower edge curve 1423h of the first tail portion 1423b of the first twisted blade 1423 are not the same.

[0064] The inventors discovered that the current molds for manufacturing twisted blades are quite complex, and the processing time during the injection molding of the first part is relatively long. Therefore, the inventors optimized the injection molds to reduce the processing time during the injection molding of the first part.

[0065] Please refer to Figures 19 to 30 As shown, this application also discloses a manufacturing mold 200 for an electric pump 100. The manufacturing mold 200 includes a first injection mold 20, which includes a first mold core portion 201 and a runner plate portion 205. The first mold core portion 201 is used to define the pressure surface of a portion of the first twist blade 1423. The first mold core portion 201 includes a plurality of first mold core portions 201, and at least two of the plurality of first mold core portions 201 are slidably connected to the runner plate portion 205. A first direction 101 and a second direction 1002 are defined. The first direction 101 is parallel to the height direction of the manufacturing mold 200, and the second direction 1002 is perpendicular to the first direction. The runner plate portion 205 can move along the first direction 101. When the runner plate portion 205 moves along the first direction 101, the runner plate portion 205 can drive at least two first mold core portions 201 to move simultaneously along the first direction 101 and the second direction 1002. In this way, at least two first mold cores 201 move in tandem with the movement of the runner plate 205. Compared to pulling multiple first mold cores 201 individually, this reduces the cycle time of the electric pump. It should be noted that the first direction 101 is the direction in which the front mold 203 and the rear mold 204 separate in the following text. The "sliding connection" described above refers to two objects being in contact but not fixed, and able to slide relative to each other. In this embodiment, there are four first mold cores 201, all of which are slidably connected to the runner plate 205. The first injection mold 20 includes a feed port plate 207. Along the first direction 101, the feed port plate 207 is located away from the part to be injection molded (first part 144) relative to the runner plate 205, and the feed port plate 207 is provided with a feed port 207a. After the front mold and the rear mold are closed, the side of the runner plate near the support part will also limit the first mold core 201, which helps to reduce the displacement of the first mold core during the injection molding process.

[0066] Specifically, as one implementation method, please refer to Figures 19 to 27As shown, the flow channel plate portion 205 includes a flow channel plate base portion 2052 and a support portion 2051. The flow channel plate base portion 2052 is fixedly connected to the support portion 2051. The support portion 2051 includes a first slide groove 2051a. One end of the first mold core portion 201 is located in the first slide groove 2051a. The direction in which the length of the first slide groove 2051a extends forms a preset angle with the first direction 101. Specifically, the angle between the direction in which the length of the first slide groove 2051a extends and the first direction 101 is greater than 0° and less than or equal to 30°. In this way, the movement of the first module 201 in the first slide groove 2051a is smoother, reducing the possibility of the first module 201 getting stuck. The mold core portion 201 can move along the direction in which the length of the first slide groove 2051a extends. The other end of the first mold core portion 201 is used to define the pressure surface 1423c of the first twist blade 1423 near the first head 1423a. In this way, only the first groove 2051a needs to be set on the support part 2051 to realize the simultaneous movement of the first mold core part 201 in the first direction 101 and the second direction 1002. The structure of the first injection mold 20 is relatively simple, which facilitates the processing and manufacturing of the first injection mold 20.

[0067] For details, please refer to Figures 19 to 27 As shown, the manufacturing mold 200 includes a front mold 203. Along the height direction of the manufacturing mold 200, the front mold 203 is close to the workpiece to be injection molded relative to the runner plate portion 205. It can be understood that the workpiece to be injection molded here is the first part 144. The front mold 203 includes a front mold base portion 2033 and a welding groove core portion 2034. There are multiple welding groove core portions 2034. At least two of the multiple welding groove core portions 2034 are fixedly connected to the front mold base portion 2033. The welding groove core portion 2034 is used to define a second groove portion 142e. In order to achieve a reliable connection between the first part 144 and the second part 145, there are multiple second groove portions 142e. The number of welding groove core portions 2034 matches the number of second groove portions 142e. In this way, when the front mold 203 and the rear mold 204 are demolded along the first direction 101, the welding groove core 2034 can be separated from the second groove 142e. Thus, compared with the design of separating the welding groove core 2034 from the second groove 142e separately, it is beneficial to further reduce the processing cycle of manufacturing the electric pump 100.

[0068] Specifically, as one implementation method, please refer to Figures 19 to 27As shown, the front mold 203 includes a mold forming portion 2035, which is fixedly connected to the front mold base 2033. The mold forming portion 2035 defines the suction surface 1423d of the first torsion blade 1423 and the second sub-inner surface 1422d of the lower plate 1422. The mold forming portion 2035 includes guide grooves 2035a, the number of which matches the number of welding groove cores 2034, with some welding groove cores 2034 located in the guide grooves 2035a. Since the mold forming portion 2035 is prone to wear, separating the mold forming portion 2035 from the front mold base 2033 facilitates the replacement of the worn mold forming portion 2035, thereby reducing the cost of manufacturing the electric pump.

[0069] Specifically, as one implementation method, please refer to Figures 19 to 30 As shown, the manufacturing mold 200 includes a rear mold 204 and a second mold core 202. The second mold core 202 comprises multiple parts and defines a second sub-pressure surface 1424q of the first torsion blade 1423. At least two of the multiple second mold cores 202 are slidably connected to the rear mold 204. When the rear mold 204 moves along the first direction 101, the second mold cores 202 can move along the second direction 1002. Thus, firstly, the processing cycle of manufacturing the electric pump is further reduced; secondly, only the rear mold 204 needs to be moved along the first direction 101 to simultaneously demold the multiple second mold cores 202 from the first part 144. It can be understood that when designing the mold, only whether the first injection mold 20 has sufficient demolding space in the first direction 101 needs to be considered, which is beneficial for miniaturizing the first injection mold 20 in the second direction 1002.

[0070] For details, please refer to Figures 19 to 30 As shown, in one implementation, the rear mold base 2046 includes a third groove 2044, and a second groove 2044 is recessed from the upper surface of the rear mold base 2046. The second groove 2044 extends along a second direction 1002, and the second mold core 202 can move along the direction of the extension of the second groove 2044. This arrangement simplifies the structure of the first injection mold 20.

[0071] As one implementation method, please refer to Figures 19 to 30As shown, the manufacturing mold 200 includes a mold body 208 and a guide 209. The mold body 208 and the guide 209 are fixedly connected. The guide 209 includes a vertical part 209a and an inclined part 209b. The vertical part 209a and the inclined part 209b are fixedly connected or are integral structural components. The second mold core 202 includes a limiting groove 2023, and the inclined part 209b is located in the limiting groove 2023. This simplifies the structure of the first injection mold 20. Specifically, the angle between the extending directions of the inclined part 209b and the vertical part 209b is an acute angle. Specifically, the angle between the extending directions of the inclined part 209b and the vertical part 209b is greater than 0° and less than or equal to 30°. It can be understood that the extending direction of the vertical part is parallel to the first direction, and the angle between the opposite direction of the vertical part and the extending direction of the inclined part is greater than 0° and less than or equal to 30°. This helps to reduce the possibility of the second mold core 202 getting stuck during movement. When the rear mold 204 moves along the first direction 101, the second mold core 202 moves along the direction of the inclined portion 209b, and then the second mold core 202 separates from the second sub-pressure surface 1424q of the first portion.

[0072] During the injection molding process, please refer to... Figures 19 to 30 As shown, in order to prevent the second mold core 202 from moving along the first direction 101, as one implementation, the manufacturing mold 200 includes a locking part 206, which is fixedly connected to the front mold 203, and at least part of the locking part 206 is located in the third slide groove 2044.

[0073] As one implementation method, please refer to Figures 19 to 30 As shown, the rear mold 204 includes a rear mold forming part 2035, which is fixedly connected to the base of the rear mold 204. The rear mold forming part 2035 is used to define the outer peripheral surface 1414 of the rotor assembly 141, the outer surface 1422b of the lower plate 1422, and the peripheral side surface 1422e of the lower plate 1422.

[0074] Please refer to Figures 19 to 30As shown, after the first injection molding is completed, when the runner plate 205 moves along the first direction 101, it drives the first mold core 201 to move along the first slide groove 2051a in the first direction 101 and the second direction 1002, so that the first mold core 201 moves along the direction inclined to the first direction 101. The first mold core 201 moves away from the first part 144 and separates from the first sub-pressure surface 1423p. The front mold 203 moves upward along the first direction 101. At the same time as it moves, it drives multiple welding groove cores 2034 to move simultaneously in the first direction 101. The rear mold 204 moves along the first direction 101 under the action of external force. At the same time as it moves, it drives the second mold core 202 to move along the second direction 1002, realizing the separation of the second mold core 202 from the first part 144. In this application, the runner plate portion 205, the front mold 203, and the rear mold 204 of the first injection mold 20 only move in the first direction 101 to complete the separation of the first mold core portion 201, the second mold core portion 202, and the first portion 144. Therefore, in the second direction 101, there is no need to consider the space required for demolding of the first injection mold 20, which facilitates the installation of the first injection mold 20. This improves the adaptability of the installation position of the first injection mold 20. For example, in spaces with relatively small space in the second direction 1002, the first injection mold 20 can meet the installation requirements.

[0075] The above descriptions merely illustrate several technical solutions of the present invention, and while the details are relatively specific, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and controls without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this invention patent should be determined by the technical solutions described in this application.

Claims

1. A manufacturing mold (200) of an electric pump (100), characterized by: The manufacturing mold (200) comprises a first injection mold (20), the first injection mold (20) comprises a first mold core part (201), a runner plate part (205); the first mold core part (201) is used to define the pressure surface (1423c) of the partial first twisted blade (1423), the first mold core part (201) comprises a plurality of, at least two of the plurality of first mold core parts (201) are slidingly connected with the runner plate part (205), defining a first direction (101) and a second direction (1002), the first direction (101) is parallel to the height direction of the manufacturing mold (200), the second direction (1002) is perpendicular to the first direction (101), the runner plate part (205) can move along the first direction (101), when the runner plate part (205) moves along the first direction (101), the runner plate part (205) can drive at least two first mold core parts (201) to move along the first direction (101) and the second direction (1002) at the same time.

2. A manufacturing mold (200) of an electric pump (100) according to claim 1, characterized in that, The runner plate part (205) comprises a runner plate base (2052) and a support part (2051), the runner plate base (2052) is fixedly connected with the support part (2051), the support part (2051) comprises a first sliding groove (2051a), one end of the first mold core part (201) is located in the first sliding groove (2051a), the length extension direction of the first sliding groove (2051a) forms a preset angle with the first direction (101), the first mold core part (201) can move along the length extension direction of the first sliding groove (2051a), the other end of the first mold core part (201) is used to define the pressure surface (1423c) of the first twisted blade (1423) close to the first head part (1423a).

3. A manufacturing mold (200) of an electric pump (100) according to claim 2, characterized in that, The length extension direction of the first sliding groove (2051a) forms a preset angle greater than 0° and less than or equal to 30° with the first direction (101).

4. A manufacturing mold (200) of an electric pump (100) according to claim 2 or 3, characterized in that: The manufacturing mold (200) comprises a front mold (203), along the height direction of the manufacturing mold (200), the front mold (203) is close to the to-be-injected workpiece relative to the runner plate part (205), the front mold (203) comprises a front mold base (2033) and a welding groove core part (2034), the welding groove core part (2034) comprises a plurality of, at least two of the plurality of welding groove core parts (2034) are fixedly connected with the front mold base (2033), and the welding groove core part (2034) is used to define a second groove part (142e).

5. A manufacturing mold (200) of an electric pump (100) according to claim 2 or 3, characterized in that: The front mold (203) comprises a mold forming portion (2035) fixedly connected with the front mold base (2033), the mold forming portion (2035) is used for defining a suction surface (1423d) of the first twisted blade (1423) and a second sub-internal surface (1422d) of the lower plate (1422), the mold forming portion (2035) comprises guide grooves (2035a), the number of the guide grooves (2035a) matches the number of the welding groove cores (2034), and part of the welding groove cores (2034) are located in the guide grooves (2035a).

6. A manufacturing mold (200) of an electric pump (100) according to any one of claims 1 to 5, characterized in that: The manufacturing mold (200) comprises a rear mold (204) and a plurality of second mold core portions (202), the plurality of second mold core portions (202) define second sub-pressure surfaces (1424q) of the first twisted blades (1423), at least two of the plurality of second mold core portions (202) are in sliding connection with the rear mold (204), and the second mold core portions (202) are movable in a second direction (1002) when the rear mold (204) moves in the first direction (101).

7. A manufacturing mold (200) of an electric pump (100) according to claim 6, characterized in that: The rear mold (204) comprises a rear mold base (2046), the rear mold base (2046) comprises third sliding grooves (2044) recessed from an upper surface of the rear mold base (2046), the third sliding grooves (2044) extend in the second direction (1002), and the second mold core portions (202) are movable in a direction extending along the length of the third sliding grooves (2044).

8. A manufacturing mold (200) of an electric pump (100) according to claim 7, characterized in that: The manufacturing mold (200) comprises a mold body portion (208) and a guide portion (209), the mold body portion (208) is fixedly connected with the guide portion (209), the guide portion (209) comprises a vertical portion (209a) and an inclined portion (209b), the vertical portion (209a) is fixedly connected with the inclined portion (209b) or is an integral structure with the inclined portion (209b), the angle between the extension direction of the inclined portion (209b) and the opposite direction of the extension direction of the vertical portion (209a) is an acute angle, the second mold core portions (202) comprise limiting grooves (2023), and the inclined portion (209b) is located in the limiting grooves (2023).

9. A manufacturing mould (200) of an electric pump (100) according to claim 7 or 8, characterized in that: The manufacturing mold (200) comprises a mold locking portion (206), the mold locking portion (206) is fixedly connected with the front mold (203), and at least part of the mold locking portion (206) is located in the third sliding groove portion (2044).

10. A manufacturing mould (200) of an electric pump (100) according to any one of claims 7 to 9, characterized in that: The rear mold (204) comprises a rear mold forming portion (2045) fixedly connected with the rear mold base (2046), the rear mold forming portion (2045) is used for defining an outer peripheral surface (1414) of the rotor assembly (141), an outer surface (1422b) of the lower plate (1422), and a circumferential side surface (1422e) of the lower plate (1422).

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