Electric pump

Abstract

The invention discloses an electric pump, the electric pump comprises a stator winding, the stator winding comprises an insulation framework and a plurality of windings, the plurality of windings are wound on the insulation framework, the plurality of windings are divided into a plurality of groups, the plurality of groups of windings are electrically connected through one or more winding wires, the plurality of windings comprise first free end parts and second free end parts, the first free end part is positioned on the winding which is wound at the beginning, the second free end part is positioned on the winding which is wound at the last, each group of windings comprises a wiring winding part, the wiring winding part of one group of windings is defined as a first wiring winding part, and the first free end part and the second free end part are electrically connected through a conductive piece. In this way, the number of the wiring end parts of the winding can be reduced.

Description

[Technical field]

[0001] The present application relates to the field of fluid driving, and in particular to an electric pump. [Background technology]

[0002] The electric pump includes a stator winding, which includes an insulating frame and a winding. The winding is wound around the insulating frame. After the winding is wound, a connection end is formed. The more the number of connection ends is, the more difficult it is to organize the wires at the ends of the stator winding. [Summary of the invention]

[0003] The purpose of the present application is to provide an electric pump, which is conducive to reducing the number of connection ends of the winding, thereby facilitating the arrangement of the wires at the ends of the stator winding.

[0004] To achieve the above-mentioned purpose, an embodiment of the present application adopts the following technical solution: an electric pump, the electric pump includes a stator winding, the stator winding includes an insulating frame and a winding, the winding is wound on the insulating frame, the winding includes multiple groups of sub-windings, one end of the sub-winding wound first and one end of the sub-winding wound last are electrically connected through at least one winding wire, the other end of the sub-winding wound first is defined as a first free end, the other end of the sub-winding wound last is defined as a second free end, and the first free end is electrically connected to the second free end through a conductive member.

[0005] In one embodiment of the present application, one end of the sub-winding wound first and one end of the sub-winding wound last are electrically connected through at least one winding wire, the other end of the sub-winding wound first is defined as the first free end, the other end of the sub-winding wound last is defined as the second free end, and the first free end and the second free end are electrically connected through the conductive member. Multiple groups of sub-windings include the first free end and the second free end, which is conducive to reducing the number of connection ends, and further facilitates the arrangement of the stator winding end wires.

Brief Description of the Drawings

[0006] Figure 1 It is a three-dimensional structural schematic diagram of a first embodiment of the electric pump of the present application;

[0007] Figure 2 yes Figure 1 A schematic diagram of an exploded structure of an electric pump;

[0008] Figure 3 yes Figure 1 Schematic diagram of the structure of the electric pump along the XX section;

[0009] Figure 4 yes Figure 1 A schematic diagram of the cross-sectional structure of the stator assembly of the electric pump in one direction;

[0010] Figure 5 yes Figure 1 A schematic diagram of a three-dimensional structure of a first embodiment of a stator winding of an electric pump;

[0011] Figure 6 yes Figure 5 Schematic diagram of the structure of the stator winding after it is unfolded along the circumferential direction;

[0012] Figure 7 yes Figure 5 Schematic diagram of the winding arrangement structure of the stator winding;

[0013] Figure 8 yes Figure 1 A schematic diagram of the three-dimensional structure of a stator core of an electric pump according to an embodiment of the present invention;

[0014] Fig. 9 yes Figure 8 A schematic diagram of the top view of the stator core;

[0015] Fig.10 yes Fig. 9 A schematic diagram of the enlarged structure of the stator core;

[0016] Fig.11 yes Figure 8 A structural schematic diagram of the relative positions of one of the sub-core parts of the stator core and other sub-core parts;

[0017] Fig.12 yes Figure 1 A schematic diagram of a three-dimensional structure of a second embodiment of a stator winding of an electric pump;

[0018] Fig.13 yes Fig.12 Schematic diagram of the structure of the stator winding after it is unfolded along the circumferential direction;

[0019] Fig.14 yes Fig.12 Schematic diagram of the winding arrangement structure of the stator winding;

[0020] Fig.15 yes Figure 1 A schematic diagram of the three-dimensional structure of the stator winding of the electric pump without the winding wire;

[0021] Fig.16 yes Fig.15 The enlarged structural diagram at B in the middle;

[0022] Fig.17 yes Figure 1 A schematic diagram of a three-dimensional structure of an embodiment in which a middle connecting plate assembly is installed to a stator winding;

[0023] Fig.18 yes Fig.17Schematic diagram of the exploded structure of the middle connecting plate assembly and the stator winding;

[0024] Fig.19 yes Figure 4 A schematic diagram of the three-dimensional structure of the first component;

[0025] Fig. 20 yes Figure 4 A schematic diagram of the three-dimensional structure of the second shell;

[0026] In the accompanying drawings: 100, electric pump;

[0027] 11. Pump cover;

[0028] 12. Rotating assembly; 121. Impeller assembly; 122. Rotor assembly;

[0029] 13. stator assembly; 131. housing; 1311. first housing; 1311a. first main body; 1311b. inner groove; 1311c. first inner groove; 1311d. second inner groove; 1312. second housing; 1312a. raised portion; 1312b. bottom of rotor cavity; 1312c. side of rotor cavity; 1312d. radial extension; 1312e. first raised portion; 1312f. second raised portion;

[0030] 132, stator winding; 1321, stator core; 1321a, sub-core; 1321b, first side wall; 1321c, second side wall; 1321d, recess; 1321e, outer side wall; 1321f, first recess wall; 1321g, second recess wall; 1321h, first line segment; 1321e, second line segment; 1321k, first intersection; 1321m, circumferential trajectory; 1321n, grounding slot; 1321p, first slot wall; 1321q, second slot wall; 1321s, first distance L; 1321t, first sub-core; 1321u, second sub-core;

[0031] 1322, insulating frame; 1322b, mounting portion; 1322c, anti-slip groove; 1322d, stop portion; 1322e, winding portion; 1322f, stop portion; 1322g, first mounting portion; 1322h, second mounting portion; 1322j, third mounting portion; 1322k, bottom portion; 1322m, upper end portion; 1322n, inner portion; 1322p, outer portion; 1322q, main body; 1322s, isolation seat; 1322t, wire stop portion;

[0032] 1323, winding; 1323a, first group of sub-windings; 1323b, second group of sub-windings; 1323c, third group of sub-windings; 1323d, first bridge wire; 1323e, first connecting wire; 1323f, second bridge wire; 1323g, second connecting wire; 1323p, third bridge wire; 1323q, third connecting wire;

[0033] 1323s, first free end; 1323s1, first electrical connection section; 1323t, second free end;

[0034] 1323t1, second electrical connection section; 1323h, first connection portion; 1323i, second connection portion;

[0035] 1323j, third connection part; 1323k, fourth connection part; 1323m, fifth connection part; 1323n, sixth connection part; 1324, connection winding part; 1324a, first connection winding part; 1324b, second connection winding part; 1324c, third connection winding part;

[0036] 14. Connecting plate assembly; 141. Conductive member; 1411. Grounding end; 1412. First connecting end; 1413. Second connecting end; 142. Positioning member;

[0037] 15. Shaft; 16. First component; 17. Rotor cavity; 18. Impeller cavity; 101. First surface; 102. Reference surface; 103. Injection connection surface; 1031. End connection surface; 1032. Cylindrical connection surface; 104. Contact surface. [Specific implementation method]

[0038] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments:

[0039] The specific implementation methods of the present application are further described in detail below in conjunction with the accompanying drawings. First of all, it should be noted that the directional terms such as up, down, left, right, front, back, inside, outside, top, bottom, etc. mentioned or may be mentioned in the specification of the present invention are defined relative to the structure shown in the corresponding drawings. They are relative concepts, and therefore may change accordingly according to their different locations and different usage states. Therefore, these or other directional terms should not be interpreted as restrictive terms.

[0040] The electric pump in the following embodiments can provide flow power for the working medium of the automobile thermal management system. The working medium may include a 50% ethylene glycol aqueous solution or clean water. Of course, the working medium may also be other substances.

[0041] See also Figures 1 to 4As shown, the present application provides an electric pump 100 including a pump cover 11, a rotating assembly 12, and a stator assembly 13. The stator assembly 13 includes a connecting plate assembly 14, a stator winding 132, a shaft 15, and a housing 131; the pump cover 11 and the stator assembly 13 are sealed and fixed. It should be noted that the sealing and fixing here means that when the electric pump 100 is working, the working medium is prevented from leaking to the outside of the electric pump 100. The shaft 15 is fixed to the housing 131 by injection molding. It can be understood that part of the shaft 15 is embedded in the housing 131. The electric pump 100 has a pump cavity, and the rotating assembly 12 is located in the pump cavity. The pump cavity includes a rotor cavity 17 and an impeller cavity 18, and the rotor cavity 17 and the impeller cavity 18 are connected. The rotating assembly 12 includes a rotor assembly 121 and an impeller assembly 122, and the rotor assembly 121 includes a permanent magnet. At least part of the rotor assembly 121 is located in the rotor cavity 17, and the impeller assembly 122 is located in the impeller cavity 18, and the pump cavity can have a working medium flowing through. In a specific embodiment, the other end of the shaft 15 is at least partially located in the rotor cavity 17, at least part of the rotating assembly 12 is sleeved on the outer periphery of the shaft 15, and the rotating assembly 12 is connected to the shaft 15 in a transmission manner. Of course, as other implementations, the rotating assembly 12 is fixedly connected to the shaft 15, and the shaft 15 rotates with the rotor assembly 121. The connecting plate assembly 14 includes a limiter 142 and a conductive member 141, the limiter 142 is limitedly connected or fixedly connected to the stator winding 132, and the conductive member 141 is limitedly connected or fixedly connected to the limiter 142. Specifically, the conductive member 141 is partially embedded in the limiter 142, and the limiter 142 is an injection molded part. The conductive member 141 includes a first connection end and a second connection end, the first connection end is electrically connected to the stator winding 132, and the second connection end can be used as a pin end when electrically connected to the external power supply of the electric pump 100. Of course, as other implementations, the electric pump 100 may also not include the pump cover 11, and the pump cover 11 is integrated on the external structure. Such a configuration is more conducive to the integrated design of the electric pump 100, making the structure of the electric pump 100 more compact, and more conducive to the miniaturization and lightness of the structure of the electric pump 100. When the electric pump 100 is working, the current of the stator winding 132 is controlled to control the excitation magnetic field generated by the stator winding 132, and the rotating assembly 12 rotates around the shaft 15 under the action of the excitation magnetic field.

[0042] See also Figure 5As shown, the stator winding 132 includes a stator core 1321, an insulating frame 1322 and a winding 1323, the number of windings 1323 is at least three, the insulating frame 1322 is coated on at least part of the surface of the stator core 1321, and the insulating frame 1322 is used to isolate the winding 1323 and the stator core 1321, so that the winding 1323 and the stator core 1321 are electrically insulated. The insulating frame 1322 and the stator core 1321 can be an integrated structural part. Specifically, as an implementation method, the insulating frame 1322 is formed by injection molding with the stator core 1321 as an insert. Of course, as other implementation methods, the insulating frame 1322 and the stator core 1321 are separately set, and the "separate setting" here means that the insulating frame 1322 and the stator core 1321 are respectively processed into two separate parts and then assembled. The connection is limited or fixed by assembly. In this embodiment, the insulating skeleton 1322 is formed by injection molding with the stator core 1321 as an insert. It can be understood that the stator core 1321 and the insulating skeleton 1322 are an integrated structure. The winding is wound around the insulating skeleton 1322. As a specific embodiment, the winding includes nine windings. Of course, as other embodiments, the winding 1323 can also include other numbers of windings, such as three or six, nine or twelve, etc. In this embodiment, the winding is nine.

[0043] To achieve miniaturization of the electric pump 100, please refer to Figures 5 to 11 As shown, as an implementation method, the stator core 1321 is a split structure. Specifically, the stator core 1321 includes a plurality of sub-core parts 1321a, and the insulating skeleton 1322 includes a plurality of sub-skeleton parts 1322a, and the sub-skeleton part 1322a is coated on at least the surface of the sub-core part 1321a. When winding, the plurality of sub-core parts 1321a form a chain structure before winding. After the winding is completed, the plurality of sub-core parts 1321a are welded to form a full circle structure. When winding such a structure, a chain structure can be used for winding. It should be noted that winding with a chain structure means arranging the sub-core parts of the split stator core 1321 in a horizontal row for winding, and then forming a circle after the winding is completed, and then welding and fixing each sub-core part 1321a. This structure is set up because the winding wire is first wound and then formed into a circle to form the stator winding 132. In this winding method, when the stator slot space is constant, the number of turns of the winding coil on each sub-frame part may increase, which is conducive to improving the slot fill rate of the stator winding 132. When the power of the electric pump 100 is the same, the size of the stator core 1321 in the axial direction 15 can be reduced, thereby laying a certain foundation for the miniaturization of the electric pump 100. It should be noted that the stator slot is the space formed by splicing adjacent sub-frame parts 1322a.

[0044] As an implementation, see Figures 5 to 11 As shown, the stator core 1321 includes at least two sub-core parts 1321a, and the at least two sub-core parts 1321a are distributed along the circumference of the stator core 1321. Each sub-core part 1321a includes a first side wall 1321b and a second side wall 1321c. Along the circumference of the stator core 1321, the first side wall 1321b and the second side wall 1321c are located on opposite sides of the sub-core part 1321a. One of the sub-core parts 1321a is defined as a first sub-core part 1321t, and the sub-core part adjacent to the first sub-core part 1321t is defined as a second sub-core part 1321t. The stator core 1321 includes a recess 1321d, and the recess 1321d includes a first recessed wall 1321f and a second recessed wall 1321g. The first recessed wall 1321f is arranged opposite to the second recessed wall 1321g. The first recessed wall 1321f is a part of the first side wall 1321b of the first sub-core part 1321t, and the second recessed wall 1321g is a part of the second sub-core part 1321t. A portion of the second side wall 1321c of the core portion 1321u defines a first surface 101, the first surface 101 is perpendicular to the axis of the stator core 1321, the projection of the first concave wall 1321f on the first surface 101 is defined as a first line segment 1321h, the projection of the second concave wall 1321g on the first surface 101 is defined as a second line segment 1321e, the first line segment 1321h is equal to the second line segment 1321e, the first line segment 1321h intersects with the second line segment 1321e, or the first line segment 1321h and the extension line of the second line segment 1321e intersect , define the intersection of the first line segment 1321h and the second line segment 1321e as the first intersection 1321k, define the projection of the outer wall of the stator core 1321 on the first surface 101 as the circumferential trajectory line 1321m, along the radial direction of the electric pump 100, the radial distance from the first intersection 1321k to the circumferential extension line 1321m of the circumferential trajectory line 1321m is the first distance L, and the first distance L is less than or equal to 0.5mm; the first line segment 1321h or the second line segment 1321e can be a straight line segment or a curved line segment. Through such a setting, when the stator core 1321 is welded, the overflow can be effectively stored to prevent the overflow from protruding from the outer wall of the stator core 1321, and at the same time, the depth dimension of the concave portion in the radial direction is limited to a suitable range, and the performance of the motor can also be guaranteed.

[0045] As an implementation, see Figures 5 to 11 , Fig.17 , Fig.18As shown, the stator core 1321 further includes a grounding slot 1321n, the sub-core portion 1321a includes an outer side wall portion 1321e, and the outer side wall portion 1321e is connected to the first side wall 1321b and the second side wall 1321c respectively. Along the radial direction of the stator core 1321, the stator slot is recessed in the outer side wall portion 1321e. The grounding slot 1321n includes a first slot wall 1321p and a second slot wall 1321q. The first slot wall 1321p is arranged parallel to the second slot wall 1321q. Along the circumferential direction of the stator core 1321, the distance between the first slot wall 1321p and the second slot wall 1321q is a first distance 1321s. The conductive member 141 includes a grounding end portion 1411, at least part of the grounding end portion 1411 is located in the grounding slot 1321n, and the grounding end portion 1411 is interference fit with the grounding slot 1321n. Specifically, the width dimension of the grounding end portion 1411 is greater than the first distance 1321s. When the stator winding 132 is wound, the grounding slot 1321n can also be used as a positioning slot for the sub-core portion 1321a and the external winding tooling. In this way, while reducing the manufacturing difficulty of the electric pump 100, it is helpful to ensure reliable grounding of the stator core 1321 and improve the EMC performance of the motor in the electric pump 100.

[0046] In order to reduce the wiring ends of the windings, it is convenient to arrange the ends of the stator windings 132 after the stator windings 132 are wound. As an implementation method, please refer to Figures 1 to 20As shown, the stator winding 132 includes an insulating frame 1322 and a winding 1323, the winding 1323 is wound on the insulating frame 1322, and the winding direction of the winding 1323 on the insulating frame 1322 is the same. The winding 1323 includes multiple groups of sub-windings, and one end of the sub-winding wound first is electrically connected to one end of the sub-winding wound last through at least one winding wire. The other end of the sub-winding wound first is defined as the first free end 1323s, and the other end of the sub-winding wound last is defined as the second free end 1323t. The first free end 1323s is electrically connected to the second free end 1323t through the conductive member 141. Each group of sub-windings includes a wiring winding portion 1324, and multiple wiring winding portions 1324 are arranged adjacent to each other. The wiring winding portion 1324 is used to be electrically connected to an external power supply. It should be noted that the above-mentioned wiring end refers to the free end formed after the winding 1323 is wound. In the above scheme, if the stator winding 132 is wound by one winding wire, two connection ends are formed after the stator winding 132 is wound. If the stator winding 132 is wound by N winding wires, 2N connection ends are formed after the stator winding 132 is wound. In this way, first, it is helpful to reduce the connection ends of the stator winding 132, and then it is convenient to arrange the wires at the end after the stator winding 132 is wound. Second, due to the reduction of the connection ends, the position for electrical connection with the outside will be reduced, which is helpful to improve the reliability of the electrical connection of the electric pump 100 and to improve the life of the electric pump 100. Third, the adjacently arranged connection winding parts 1324 are conducive to simplifying the structure of other parts, such as the structure of the connection plate assembly 14 electrically connected to the stator winding 132. In one embodiment, the conductive member 141 is fixed to the stopper 142 by injection molding, that is, the conductive member 141 is installed on the stator winding 132 to achieve electrical connection. In order to improve the assembly accuracy of the connection plate assembly 14 and the stator winding 132, the connection winding parts are arranged adjacently, which is more conducive to improving the position accuracy of the conductive member 141 electrically connected to the stator winding 132, reducing the manufacturing difficulty of the connection plate assembly 14, and laying a certain foundation for reducing the production cost of the electric pump 100. It should be noted that the "adjacent" here and below refers to the adjacent arrangement of multiple connection winding parts 1324 along the clockwise or counterclockwise direction of the stator winding circumference. It can be understood that the multiple connection winding parts 1324 are respectively arranged corresponding to the adjacent multiple sub-core parts, that is, the sub-core parts corresponding to the adjacent connection winding parts 1324 are adjacent. It should be noted that the "corresponding" arrangement here specifically means that the connection winding part corresponds to the tooth part of the corresponding sub-core part one by one, and the connection winding part is arranged radially outside the tooth part of the corresponding sub-core part. The winding part described below covers the tooth part of the sub-core part.

[0047] As a specific implementation method, please refer to Figures 1 to 20As shown, multiple groups of sub-windings 1323 are electrically connected through at least one winding wire, and multiple sub-windings 1323 include a first free end 1323s and a second free end 1323t, the first free end 1323s is located at the first winding, and the second free end 1323t is located at the last winding. Specifically, the stator winding 132 includes a first group of sub-windings 1323a, a second group of sub-windings 1323b and a third group of sub-windings 1323c, and the first group of sub-windings 1323a is defined as the first winding group, the first group of sub-windings 1323a includes a first free end 1323s, and the third group of sub-windings 1323c includes a second free end 1323t, and the electric pump 100 includes a conductive member 141, the first free end 1323s and the second free end 1323t. 3t is electrically connected through the conductive member 141, and the plurality of connection winding parts 1324 include a first connection winding part 1324a, a second connection winding part 1324b and a third connection winding part 1324c, the first connection winding part 1324a is located at the position where the first free end 1323s and the second free end 1323t are connected to the conductive member 141, and the second connection winding part 1324b and the third connection winding part 1324c are adjacent to the first connection winding part 1324a in sequence. In this way, it is helpful to reduce the manufacturing difficulty of the parts matched with the stator winding 132, such as the connection plate assembly 14.

[0048] To simplify the winding method of the stator winding 132, please refer to Figures 1 to 20 As shown, the electric pump 100 is miniaturized while the stator winding 132 is conveniently electrically connected to the connecting plate assembly 14. As a specific embodiment, the stator winding 132 is unfolded along the circumferential direction, and the outer wall of the stator winding 132 is viewed. Figure 6As shown, the windings are numbered from left to right. The first group of sub-windings 1323a, the second group of sub-windings 1323b, and the third group of sub-windings 1323c all include three windings. The three windings of the first group of sub-windings 1323a are defined as the first coil, the fourth coil, and the seventh coil; the three coils of the second group of sub-windings are the second coil, the fifth coil, and the eighth coil; the three coils of the third group of sub-windings are the third coil, the sixth coil, and the ninth coil; the first coil includes a first free end 1323s, the first group of sub-windings 1323b includes a first bridge wire 1323d and a first connecting wire 1323e, the second group of sub-windings 1323b includes a second bridge wire 1323f and a second connecting wire 1323g, the third group of sub-windings 1323c includes a third bridge wire 1323p and a third connecting wire 1323q, the bridge wires between the first coil and the fourth coil and between the fourth coil and the seventh coil are the first bridge wire 1323d, the first The group of sub-windings is electrically connected to the second group of sub-windings through the first connecting wire 1323e, the bridge wire between the second coil and the fifth coil and between the fifth coil and the eighth coil is the second bridge wire 1323g, the second group of sub-windings is electrically connected to the third group of sub-windings through the second connecting wire 1323g, the bridge wire between the third coil and the sixth coil and between the sixth coil and the ninth coil is the third bridge wire 1323p, the second free end of the ninth coil is electrically connected to the first free end of the first coil through the conductive member 141, the connecting wire between the ninth coil and the first coil is the third connecting wire 1323q, the first bridge wire 1323d is on a different side from the first connecting wire 1323e, the second bridge wire 1323f is on a different side from the second connecting wire 1323g, the third bridge wire 1323p is on a different side from the third connecting wire 1323q, the second connection winding 1324b portion is located on the first connection wire 1323e, and the second connection winding portion 1324b is located on the second connection wire 1323g. In this way, it is helpful to disperse the number of wire layers at the end of the stator winding 132, thereby simplifying the end structure of the stator winding 132 and laying a certain foundation for simplifying the structure of the electric pump 100.

[0049] For details, please refer to Figures 1 to 20As shown, the stator winding 132 also includes a mounting portion 1322b. Specifically, the stator winding 132 also includes a mounting portion 1322b, and the mounting portion 1322b is arranged on the insulating frame 1322. The number of the mounting portions 1322b is the same as the number of winding groups. The number of the mounting portions 1322b is three. The mounting portion corresponding to the first coil is defined as the first mounting portion 1322g, the mounting portion corresponding to the second coil is defined as the second mounting portion 1322h, and the mounting portion 1322b corresponding to the third coil is defined as the third mounting portion 1322j. The first winding connection portion is located at the first mounting portion 1322g, the second winding connection portion is located at the second mounting portion 1322h, and the third winding connection portion is located at the third mounting portion 1322j.

[0050] To further improve the production efficiency of the stator winding 132, please refer to Figures 1 to 4 as well as Fig.13 , Fig.14 As shown, the first group of sub-windings 1323a, the second group of sub-windings 1323b and the third group of sub-windings 1323c can also be wound at the same time, and each group of windings will have two wiring ends. The last six wiring ends are electrically connected at the fixed part through the conductive member 141. In this way, it is beneficial to improve the processing rhythm of the stator winding 132 and to realize the automated production line of the stator winding 132. Fig.13 , Fig.14The schematic diagram shows that the stator winding 132 is unfolded along the circumferential direction, and the windings are numbered in sequence from left to right when viewed from the outer wall of the stator winding 132. The multiple groups of sub-windings include a first group of sub-windings 1323a, a second group of sub-windings 1323b, and a third group of sub-windings 1323c. The first group of sub-windings 1323a includes a first coil, a fourth coil, and a seventh coil. The second group of sub-windings 1323b includes a second coil, a fifth coil, and an eighth coil. The third group of sub-windings 1323c includes a first coil, a fourth coil, and a seventh coil. c includes a third coil, a sixth coil and a ninth coil, the first group of sub-windings 1323a includes a first wiring portion 1323h and a second wiring portion 1323i, the second group of sub-windings 1323b includes a third wiring portion 1323j and a fourth wiring portion 1323k, the third group of sub-windings 1323c includes a fifth wiring portion 1323m and a sixth wiring portion 1323n, and the plurality of wiring winding portions include a first wiring winding portion 1323a, a second wiring winding portion 1324b and a third wiring winding portion 1324c, the first connection part 1323h is electrically connected to the sixth connection part 1323n, and the first connection part 1323h and the sixth connection part 1323n are electrically connected to each other to form the first connection winding part 1324a; the second connection part 1323i is electrically connected to the third connection part 1323j, and the second connection part 1323i and the third connection part 1323j are electrically connected to form the second connection winding part 1324b, the fifth connection part 1323m is electrically connected to the fourth connection part 1323k, and the fifth connection part The third connection winding part 1324c is formed at the place where the third connection part 1323m is electrically connected to the fourth connection part 1323k; or, the third connection part 1323j is electrically connected to the fourth connection part 1323k, the third connection part 1323j is electrically connected to the fourth connection part 1323k, the second connection winding part 1324b is formed at the place where the second connection part 1323i is electrically connected to the fifth connection part 1323m, and the third connection winding part 1324c is formed at the place where the second connection part 1323i is electrically connected to the fifth connection part 1323m. In this way, it is beneficial to realize the brake production of the stator winding 132, for example, the first group of sub-windings 1323a, the second group of sub-windings 1323b and the third group of sub-windings 1323c can be wound at the same time, which is beneficial to reduce the production tact of the stator winding 132.

[0051] To reduce the loosening of the free end windings of the stator winding 132, please refer to Figures 1 to 16As shown, as an implementation, the insulating frame 1322 includes an anti-slip groove 1323c, the insulating frame 1322 includes a stopper 1322d, a winding portion 1322e and a stopper 1322f, the stopper 1322d is arranged on one side of the winding portion 1322e, and the stopper 1322f is arranged on the other side of the winding portion 1322e, along the radial direction of the electric pump 100, the stopper 1322d is relatively far away from the center of the electric pump 100 relative to the stopper 1322f. The anti-slip groove 1323c is arranged on the stopper 1322d, and the anti-slip groove 1322c is recessed to the upper end 1322m of the stopper 1322d. Along the radial direction of the electric pump 100, the anti-slip groove 1322c penetrates the thickness direction of the stopper 1322d, and part of the wiring end is located in the anti-slip groove. Along the circumferential direction of the electric pump 100, the width value of the anti-slip groove 1322c is less than the wire diameter value of the winding, so it is conducive to clamping the winding and preventing the winding from loosening. The circumferential position of the anti-slip groove 1322c corresponds to the position of the free end. Of course, in order to facilitate the mold opening of the insulating skeleton 1322, it is also possible to set the anti-slip groove 1322c on each sub-skeleton.

[0052] Please refer to Figures 1 to 16 As shown, to facilitate the arrangement of the bridge wires, the blocking portion 1322d includes a main body 1322q and an isolation seat 1322s, the isolation seat 1322s is fixedly connected to the stator core 1321, and the main body 1322q extends in a direction away from the stator core 1321. To make the first bridge wire 1323d as close to the isolation seat 1322s as possible, the bottom 1322k of the anti-slip groove 1322c is an inclined structure, and the end face of the stator core 1321 fixedly connected to the isolation seat 1322s is defined as the reference plane 102, and the angle between the plane where the bottom is located and the reference plane 102 is an acute angle. In this way, when the first bridge line 1323d is connected from the inner side of the stopper 1322d to the outer side of the stopper 1322d, there can be a gradient transition, which is conducive to the first bridge line approaching the isolation seat 1322s, and is conducive to the arrangement of the first bridge line 1323d, the second bridge line 1323f and the third bridge line 1323p in the axial direction of the electric pump. It is conducive to reducing the space occupied by the bridge line, and lays a certain foundation for the miniaturization of the electric pump 100.

[0053] Please refer to Figures 1 to 16As shown, when the second group of sub-windings is wound after each group of windings is wound, the first connecting wire is usually arranged at the outer side of the stopper. When the second group of sub-windings is wound, in order to prevent the winding from directly jumping to the inner side of the stopper, the insulating frame 1322 also includes a wire blocking portion 1322t. Along the circumferential direction of the electric pump 100, the wire blocking portion 1322t protrudes from the upper end portion 1322m of the stopper 1322d, and the wire blocking portion 1322t is located on one side of the anti-slip groove 1322c. In this way, it is possible to reduce the possibility that the connecting wire at the outer side of the stopper 1322d directly jumps to the inner side of the stopper 1322d.

[0054] See also Figures 1 to 20 As shown, the housing 131 includes a first housing 1311 and a second housing 1312, and the first housing 1311 is formed by at least inserting the stator winding 132. Specifically, as an implementation, at least part of the first housing 1311 is formed by inserting the stator winding 132. Specifically, the first housing 1311 is formed by inserting the stator winding 132. Of course, as another implementation, the first housing 1311 is formed by inserting the connecting plate assembly 14 and the stator winding 132. Please refer to the following for details on how the first housing 1311 is formed by inserting the connecting plate assembly 14 and the stator winding 132, which will not be described in detail here. The first component 16 is defined, and the first component 16 includes a first housing 1311 and a stator winding 132. At least a portion of the second housing 1312 is formed by insert molding with the first component 16 and the shaft 15. Specifically, the second housing 1312 is formed by insert molding with the first component 16 and the shaft 15. The first housing 1311 and the second housing 1312 are fixed by injection molding.

[0055] See also Figures 1 to 20 As shown, as an implementation method, along the axial direction of the electric pump 100, the connecting plate assembly 14 and the stator winding 132 are limitedly set or fixedly connected, the connecting plate assembly 14 is electrically connected to the winding of the stator winding 132, at least part of the first housing 1311 is formed by injection molding with the stator winding 1312 and the connecting plate assembly 14 as inserts, and at least part of the connecting plate assembly 14 and part of the stator winding 132 are located in the first housing 1311. In this way, firstly, it is conducive to miniaturization of the electric pump 100 in the radial direction, and secondly, the connecting plate assembly 14 and the stator winding 132 are injection molded as inserts, which is conducive to simplifying the assembly process of the electric pump 100.

[0056] As an implementation, see Figures 1 to 20As shown, the first shell 131 includes a first main body 1311a, the first main body 1311a has an inner groove 1311b, the first component 16 includes an injection molding connection surface 103, the surface injection-moldedly connected to the second shell 1312 is the injection molding connection surface 103, the inner groove 1311b is recessed in the injection molding connection surface 103, the second shell 1312 includes a protrusion 1312a, the surface injection-molded connected to the first shell 1311 is the contact surface 104, the protrusion 1312a protrudes from the contact surface 104, and the protrusion 1312a is located in the groove 1311b. Specifically, along the axial direction of the electric pump 100, the injection molded connecting surface 103 is close to the second shell body 1312 relative to the connecting plate assembly 14, and the inner groove 1311b is recessed in the injection molded connecting surface 103. Specifically, the injection molded connecting surface 103 includes an end connecting surface 1031 and a cylindrical connecting surface 1032, and the inner groove 1311b includes a first inner groove 1311c and a second inner groove 1311d. Along the axial direction 15 of the electric pump 100, the first inner groove 1311c is recessed in the end connecting surface 1031, and along the radial direction of the electric pump 100, the second inner groove 1311d is recessed in the cylindrical connecting surface 1032.

[0057] Please refer to Figures 1 to 20 As shown, as an implementation method, the second shell 1312 is formed by injection molding with at least the first component 16 as an insert, the second shell 1312 includes a rotor cavity bottom 1312b and a rotor cavity side 1312c, the second shell 1312 also includes a radial extension section 1312d, the radial extension section 1312d is sealed and connected to one end of the rotor cavity side 1312c, along the axial direction of the electric pump 100, the radial extension section 1312d is close to the impeller cavity 18 relative to the rotor cavity bottom 1312b, the radial extension section 1312d is injection-molded and fixed at the end of the first component 16, the electric pump 100 includes an impeller cavity 18 and a rotor cavity 17, the rotor cavity 17 is connected to the impeller cavity 18, the wall portion corresponding to the rotor cavity 17 includes the rotor cavity bottom 1312b and the rotor cavity side 1312c, and the wall portion corresponding to the impeller cavity 18 includes at least part of the radial extension section 1312d. The second housing 1312 includes a protrusion 1312a, which is located in the inner groove 1311b. The protrusion 1312a includes a first protrusion 1312e and a second protrusion 1312f. The first protrusion 1312e extends along the outer wall of the rotor cavity side 1312c in a direction away from the axis of the electric pump, and the second protrusion 1312f extends along the lower end of the radial extension section 1312d in a direction away from the lower end. The end surface of the radial extension section 1312d contacts the injection molding connection surface 103. This arrangement is conducive to increasing the contact area between the first housing 131 and the second housing 131, and at the same time, it is conducive to improving the structural strength of the second housing 131.

[0058] It should be noted that the above embodiments are only used to illustrate the present application and are not intended to limit the technical solutions described in the present application. Although the present application has been described in detail in this specification with reference to the above embodiments, a person of ordinary skill in the art should understand that a person of ordinary skill in the art can still modify or make equivalent substitutions to the present application, and all technical solutions and improvements thereof that do not depart from the spirit and scope of the present application should be included in the scope of the claims of the present application.

Claims

1. An electric pump (100), characterized in that: The electric pump (100) comprises a stator winding (132) and a conductive member (141), wherein the stator winding (132) comprises an insulating frame (1322) and a winding (1323), wherein the winding (1323) is wound around the insulating frame (1322), and wherein the winding (1323) comprises a plurality of sub-windings, wherein one end of the sub-winding wound first and one end of the sub-winding wound last are electrically connected via at least one winding wire, wherein the other end of the sub-winding wound first is defined as a first free end (1323s), and the other end of the sub-winding wound last is defined as a second free end (1323t), and the first free end (1323s) and the second free end (1323t) are electrically connected via the conductive member (141).

2. The electric pump (100) according to claim 1, characterized in that: The stator winding (132) includes a first group of sub-windings (1323a), a second group of sub-windings (1323b) and a third group of sub-windings (1323c), wherein the first group of sub-windings (1323a) is defined as the winding wound initially, the first group of sub-windings (1323a) includes the first free end portion (1323s), the third group of sub-windings (1323c) includes the second free end portion (1323t), each group of the windings (1323) includes a connection winding portion (1324), and the plurality of connection winding portions (1324) include a first connection winding portion (1324a), a second connection winding portion (1324b) and a third connection winding portion (1324c) The first free end portion (1323s) includes a first electrical connection segment (1323s1), and the second free end portion (1323t) includes a second electrical connection segment (1323t1). The first electrical connection segment (1323s1) and the second electrical connection segment (1323t1) are electrically connected via the conductive member (141). The first electrical connection segment (1323s1) and the second electrical connection segment (1323t1) form the first wiring winding portion (1324a). The second wiring winding portion (1324b) and the third wiring winding portion (1324c) are sequentially adjacent to the first wiring winding portion (1324a) along the circumferential direction of the stator winding (132).

3. The electric pump (100) according to claim 2, characterized in that: The first group of sub-windings (1323a), the second group of sub-windings (1323b), and the third group of sub-windings (1323c) all include three windings, and the three windings of the first group of sub-windings (1323a) are defined as a first coil, a fourth coil, and a seventh coil; the three coils of the second group of sub-windings (1323b) are a second coil, a fifth coil, and an eighth coil; the three coils of the third group of sub-windings (1323c) are a third coil, a sixth coil, and a ninth coil; the first coil includes the first free end portion (1323s), and the first group of sub-windings (1323a) includes a first free end portion (1323s); The first group of sub-windings (1323a) and the second group of sub-windings (1323b) include a first bridge wire (1323f) and a second connection wire (1323g), the third group of sub-windings (1323c) include a third bridge wire (1323p) and a third connection wire (1323q), the bridge wires between the first coil and the fourth coil and between the fourth coil and the seventh coil are the first bridge wire (1323d), the first group of sub-windings (1323a) and the second group of sub-windings (1323b) are connected via the first connection wire (13 23e), the bridge wire between the second coil and the fifth coil and between the fifth coil and the eighth coil is the second bridge wire (1323f), the second group of sub-windings (1323b) and the third group of sub-windings (1323c) are electrically connected through the second connecting wire (1323g), the bridge wire between the third coil and the sixth coil and between the sixth coil and the ninth coil is the third bridge wire (1323p), the second free end (1323t) of the ninth coil and the first free end (1323s) of the first coil are connected through the conductive wire. The electrical components are electrically connected, the connecting wire between the ninth coil and the first coil is the third connecting wire (1323q), the first bridge wire (1323d) is on a different side from the first connecting wire (1323e), the second bridge wire (1323f) is on a different side from the second connecting wire (1323g), the third bridge wire (1323p) is on a different side from the third connecting wire (1323q), the second wiring winding portion (1324b) is located on the first connecting wire (1323e), and the second wiring winding portion (1324b) is located on the second connecting wire (1323g).

4. The electric pump (100) according to claim 2 or 3, characterized in that: The stator winding (132) also includes a mounting portion (1322b), and the insulating skeleton (1322) includes the mounting portion (1322b). The number of the mounting portions (1322b) is the same as the number of groups of the winding (1323). The number of the mounting portions (1322b) is three. The mounting portion corresponding to the first coil is defined as the first mounting portion (1322g), the mounting portion corresponding to the second coil is defined as the second mounting portion (1322h), and the mounting portion corresponding to the third coil is defined as the third mounting portion (1322j). The first winding connection portion (1324a) is located in the first mounting portion (1322g), the second winding connection portion (1324b) is located in the second mounting portion (1322), and the third winding connection portion (1324c) is located in the third mounting portion (1322j).

5. The electric pump (100) according to any one of claims 1 to 4, characterized in that: The insulating frame (1322) includes an anti-slip groove (1322c), the insulating frame (1322) includes a blocking portion (1322d), a winding portion (1322e) and a stop portion (1322f), the blocking portion (1322d) is arranged on one side of the winding portion (1322e), and the stop portion (1322f) is arranged on the other side of the winding portion (1322e), along the radial direction of the electric pump (100), the blocking portion (1322d) is away from the electric pump (100) relative to the stop portion (1322f). 100), the anti-slip groove (1322c) is arranged at the center of the blocking portion (1322d), the anti-slip groove (1322c) is recessed to the upper end of the blocking portion (1322d), along the radial direction of the electric pump (100), the anti-slip groove (1322c) penetrates the thickness direction of the blocking portion (1322d), part of the wiring end is located in the anti-slip groove (1322c), and along the circumferential direction of the electric pump (100), the width value of the anti-slip groove (1322c) is smaller than the wire diameter value of the winding.

6. The electric pump (100) according to claim 5, characterized in that: The blocking portion (1322d) comprises the main body (1322q) and the isolation seat (1322s), the isolation seat (1322s) is fixedly connected to the stator core (1321), the main body (1322q) extends in a direction away from the stator core (1321), the bottom (1322k) of the anti-slip groove (1322c) is an inclined structure, and the end face of the stator core (1321) fixedly connected to the isolation seat (1322s) is defined as the reference plane (102), and the angle between the plane where the bottom (1322k) is located and the reference plane (102) is an acute angle.

7. The electric pump (100) according to any one of claims 1 to 6, characterized in that: The insulating frame (1322) further includes a wire stop portion (1322t), which is arranged along the circumferential direction of the electric pump (100) to protrude from the upper end portion (1322m) of the stop portion (1322d), and the wire stop portion (1322t) is located on one side of the anti-slip groove (1322c).

8. The electric pump according to any one of claims 1 to 7, characterized in that: The electric pump (100) comprises a housing (131), wherein the housing (131) comprises a first housing (1311) and a second housing (1312), wherein the first housing (1311) is formed by at least using the stator winding (132) as an insert injection molding, and a first component (16) is defined, wherein the first component (16) comprises the stator winding (132) and the housing (131), and the second housing (1312) is formed by at least using the first component (16) as an insert injection molding, and the first housing (1311) comprises a first main body (1311a), wherein the first main body (1311a) has There is an inner groove (1311b), the first component (16) includes an injection-molded connection surface (103), the surface that is injection-moldedly connected to the second shell (1312) is the injection-molded connection surface (103), the inner groove (1311b) is recessed in the injection-molded connection surface (103), the second shell (1312) includes a protrusion (1312a), the surface that is injection-moldedly connected to the first shell (1311) is the contact surface (104), the protrusion (1312a) protrudes from the contact surface (104), and the protrusion (1312a) is located in the groove portion (1311b).

9. The electric pump according to any one of claims 1 to 8, characterized in that: The stator winding (132) comprises a stator core (1321), the stator core (1321) is a split structural component, the stator core (1321) comprises a plurality of sub-core parts (1321a), the stator core (1321) comprises at least two sub-core parts (1321a), at least the two sub-core parts (1321a) are distributed along the circumference of the stator core (1321), each of the sub-core parts (1321a) comprises a first side wall (1321b) and a second side wall (1321c), and the stator core (1321) is provided with a plurality of sub-core parts (1321a). In the circumferential direction, the first side wall (1321b) and the second side wall (1321c) are located on opposite sides of the sub-core portion (1321a), one of the sub-core portions (1321a) is defined as the first sub-core portion (1321t), and the sub-core portion adjacent to the first sub-core portion (1321t) is the second sub-core portion (1321u), and at least a portion of the first side wall (1321b) of the first sub-core portion (1321t) and at least a portion of the second side wall (1321c) of the second sub-core portion (1321u) are welded and fixed.

10. The electric pump according to claim 9, characterized in that: The stator core (1321) includes a recess (1321d), and the recess (1321d) includes a first recessed wall (1321f) and a second recessed wall (1321g), wherein the first recessed wall (1321f) and the second recessed wall (1321g) are arranged opposite to each other, the first recessed wall (1321f) is a part of the first side wall (1321b) of the first sub-core part (1321t), and the second recessed wall (1321g) is a part of the second side wall (1321c) of the second sub-core part (1321u), and a first surface (101) is defined, and the first surface (101) is perpendicular to the axis of the stator core (1321), and a projection of the first recessed wall (1321f) on the first surface (101) is defined as a first line segment (1321h), and the second recessed wall (1321g) is a part of the second side wall (1321c) of the second sub-core part (1321u). The projection of the stator core (1321) on the first surface (101) is defined as a second line segment (1321e), the first line segment (1321h) intersects with the second line segment (1321e) or the extension lines of the first line segment (1321h) and the second line segment (1321e) intersect, and the intersection point of the first line segment (1321h) and the second line segment (1321e) is defined as a first intersection point (1321k), and the projection of the outer wall of the stator core (1321) on the first surface (101) is defined as a circumferential trajectory line (1321m), and along the radial direction of the electric pump (100), the radial distance from the first intersection point (1321k) to the circumferential extension line of the circumferential trajectory line (1321m) is a first distance (L), and the first distance (L) is less than or equal to 0.5 mm.

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