Stator assembly, motor and electric pump

Abstract

The utility model discloses a stator assembly, a motor and an electric pump, an insulation part of the stator assembly comprises a neck insulation part and a yoke insulation part, the neck insulation part extends from the yoke insulation part towards the direction close to the axis of the assembly, the stator assembly is provided with a winding wire groove, and at least part of a winding of the stator assembly is located in the winding wire groove; the neck insulation part is provided with a first wall, the yoke insulation part comprises an inner side wall, the first wall extends from the inner side wall towards the axis close to the stator assembly, the groove wall of the winding wire groove comprises the first wall and at least part of the inner side wall, the groove wall of the guide groove of the yoke insulation part comprises a guide wall, and the guide wall extends from the inner side wall towards the axis away from the stator assembly. The first wall comprises a first end wall and a second end wall, the first end wall is close to the guide wall relative to the second end wall in the direction parallel to the axis of the stator assembly, the winding comprises a wire inlet section, the wire inlet section is in contact with at least part of the first end wall, and the wire inlet section is in contact with the guide wall.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of vehicles, in particular to a stator assembly, a motor and an electric pump. BACKGROUND

[0002] The motor comprises a stator assembly, the stator assembly comprises a stator core, an insulation part and a winding, the stator core and the insulation part are fixedly connected, the insulation part supports the winding, the insulation part comprises a yoke insulation part and a neck insulation part, the neck insulation part extends from the yoke insulation part towards the direction of the axis of the stator assembly, the stator assembly has a winding slot, the winding slot is located between adjacent neck insulation parts in the circumferential direction of the stator assembly, and at least part of the winding is located in the winding slot. If the winding is not irregularly wound after entering the winding slot, the slot fill rate of the stator assembly is low. CONTENT OF THE UTILITY MODEL

[0003] The present application provides a stator assembly, which is beneficial to improve the slot fill rate of the stator assembly.

[0004] To achieve the above-mentioned purpose, the present application adopts the following technical scheme:

[0005] A stator assembly, the stator assembly comprises an insulation part and a winding, the insulation part comprises a neck insulation part and a yoke insulation part, the neck insulation part extends from the yoke insulation part towards the direction of the axis of the stator assembly, the stator assembly has a winding slot, the winding slot is located between adjacent neck insulation parts, and at least part of the winding is located in the winding slot; the neck insulation part has a first wall, the first wall extends in the direction parallel to the axis of the stator assembly, the yoke insulation part comprises an inner side wall, the first wall is connected to the inner side wall, the slot wall of the winding slot comprises the first wall and at least part of the inner side wall, the yoke insulation part has a guide slot, the slot wall of the guide slot comprises a guide wall, the guide wall extends away from the axis of the stator assembly from the inner side wall; the first wall is composed of a first end wall and a second end wall, in the direction parallel to the axis of the stator assembly, the first end wall is closer to the guide wall relative to the second end wall, and the height of the first end wall is equal to the height of the second end wall; the winding comprises a wire entry section, the wire entry section contacts at least part of the first end wall, and the wire entry section contacts the guide wall.

[0006] In the technical solution, the slot wall of the guide slot comprises a guide wall, the guide wall extends from the inner side wall towards the axis of the stator assembly; the first wall is composed of a first end wall and a second end wall, in the direction parallel to the axis of the stator assembly, the first end wall is closer to the guide wall relative to the second end wall, the height of the first end wall is equal to the height of the second end wall; the winding comprises a wire entry section, the wire entry section contacts at least part of the first end wall, the wire entry section contacts the guide wall, the wire entry section can be attached to the first end wall after passing through the guide slot, and the wire entry section has a spacing with the first end wall relative to the circumferential direction of the stator assembly, the wire entry section occupies a smaller space of the winding slot, thereby facilitating subsequent winding regulation, and further facilitating improvement of the slot fill rate of the stator assembly.

[0007] A motor comprises a stator assembly and a motor rotor assembly, the motor rotor assembly is located radially inward of the stator assembly, the stator assembly comprises an insulation part and a winding, the insulation part comprises a neck insulation part and a yoke insulation part, the neck insulation part extends from the yoke insulation part towards the direction close to the axis of the stator assembly, the stator assembly has a winding slot, the winding slot is located between adjacent neck insulation parts, and at least part of the winding is located in the winding slot; the neck insulation part has a first wall, the first wall extends in the direction parallel to the axis of the stator assembly, the yoke insulation part comprises an inner side wall, the first wall is connected to the inner side wall, the slot wall of the winding slot comprises the first wall and at least part of the inner side wall, the yoke insulation part has a guide slot, the slot wall of the guide slot comprises a guide wall, the guide wall extends from the inner side wall towards the axis of the stator assembly; the first wall is composed of a first end wall and a second end wall, in the direction parallel to the axis of the stator assembly, the first end wall is closer to the guide wall relative to the second end wall, the height of the first end wall is equal to the height of the second end wall; the winding comprises a wire entry section, the wire entry section contacts at least part of the first end wall, and the wire entry section contacts the guide wall.

[0008] In the technical solution, the slot wall of the guide slot comprises a guide wall, the guide wall extends from the inner side wall towards the axis of the stator assembly; the first wall is composed of a first end wall and a second end wall, in the direction parallel to the axis of the stator assembly, the first end wall is closer to the guide wall relative to the second end wall, the height of the first end wall is equal to the height of the second end wall; the winding comprises a wire entry section, the wire entry section contacts at least part of the first end wall, the wire entry section contacts the guide wall, the wire entry section can be attached to the first end wall after passing through the guide slot, and the wire entry section has a spacing with the first end wall relative to the circumferential direction of the stator assembly, the wire entry section occupies a smaller space of the winding slot, thereby facilitating subsequent winding regulation, and further facilitating improvement of the slot fill rate of the stator assembly.

[0009] An electric pump, comprising a pump rotor, a stator assembly, a drive shaft and a motor rotor, the pump rotor is in driving connection with the drive shaft, the motor rotor assembly is in driving connection with the shaft, the motor rotor is located radially inside the stator assembly, the stator assembly comprises an insulation part and a winding, the insulation part comprises a neck insulation part and a yoke insulation part, the neck insulation part extends from the yoke insulation part towards the direction close to the axis of the stator assembly, the stator assembly has winding wire slots, the winding wire slots are located between adjacent neck insulation parts, at least part of the winding is located in the winding wire slots; the neck insulation part has a first wall, the first wall extends in the direction parallel to the axis of the stator assembly, the yoke insulation part comprises an inner wall, the first wall connects the inner wall, the slot wall of the winding wire slot comprises the first wall and at least part of the inner wall, the yoke insulation part has a guide slot, the slot wall of the guide slot comprises a guide wall, the guide wall extends from the inner wall away from the axis of the stator assembly; the first wall is composed of a first end wall and a second end wall, in the direction parallel to the axis of the stator assembly, the first end wall is closer to the guide wall relative to the second end wall, the height of the first end wall is equal to the height of the second end wall; the winding comprises a wire entry segment, the wire entry segment contacts at least part of the first end wall, and the wire entry segment contacts the guide wall.

[0010] In the above technical solution, the slot wall of the guide slot comprises a guide wall, the guide wall extends from the inner wall away from the axis of the stator assembly; the first wall is composed of a first end wall and a second end wall, in the direction parallel to the axis of the stator assembly, the first end wall is closer to the guide wall relative to the second end wall, the height of the first end wall is equal to the height of the second end wall; the winding comprises a wire entry segment, the wire entry segment contacts at least part of the first end wall, and the wire entry segment contacts the guide wall, the wire entry segment can stick to the first end wall after passing through the guide slot, and in the circumferential direction of the stator assembly, the wire entry segment has a spacing with the first end wall, the wire entry segment occupies less space in the winding wire slot, thereby facilitating subsequent winding regulation, and further facilitating improvement of the slot fill rate of the stator assembly. BRIEF DESCRIPTION OF DRAWINGS

[0011] Figure 1 It is a schematic diagram of an embodiment of the electric pump of the present application;

[0012] Figure 2 It is a schematic diagram of another embodiment of the electric pump of the present application;

[0013] Figure 3 It is a schematic diagram of one perspective view of the stator assembly when winding is not performed;

[0014] Figure 4 It is a schematic diagram of another perspective view of the stator assembly when winding is not performed;

[0015] Figure 5Another perspective view of the stator assembly when the winding is not started;

[0016] Figure 6 is Figure 5 is a perspective view of the stator assembly when the winding is not started;

[0017] Figure 7 is a perspective view of the stator assembly when the winding is not started;

[0018] Figure 8 is a perspective view of the stator assembly when the winding is not started;

[0019] Figure 9 is a perspective view of the stator assembly.

[0020] Reference signs: 1, pump housing; 11, motor housing; 12, bottom cover; 13, spacer; 14, pump cover; 3, electrical connection part; 31, first phase electrical connection part; 32, second phase electrical connection part; 33, third phase electrical connection part; 4, pump rotor; 41, first rotor; 42, second rotor; 5, stator assembly; 51, stator core; 52, winding; 52a, incoming wire section; 52b, winding section; 52c, outgoing wire section; 521, first coil; 521a, first connecting wire section; 522, second coil; 522a, second connecting wire section; 523, third coil; 523a, third connecting wire section; 524, fourth coil; 524a, fourth connecting wire section; 525, fifth coil; 525a, fifth connecting wire section; 526, sixth coil; 53, insulation part; 531, neck insulation part; 5311, first wall; 5311a, first end wall; 5311b, second end wall; 5312, second wall; 5313, first wire slot; 5314, second wire slot; 5315, blank section; 532, yoke insulation part; 5321, inner side wall; 5322, outer side wall; 5323, guide slot; 5323a, guide wall; 5323b, auxiliary wall; 5324, support part; 5324a, support wall; 5325, limiting part; 5325a, first subpart; 5325b, second subpart; 5326, first connector part; 5327, second connector part; 5328, third connector part; 5329, groove; 533, boot insulation part; 54, winding wire slot; 6, motor rotor; 7, drive shaft; 8, control assembly; 81, circuit board; 20, first cavity; 30, second cavity; 40, third cavity. DETAILED DESCRIPTION

[0021] In order for those skilled in the art to better understand the technical solutions of the present application, the embodiments of the present application are further described in detail below. The orientation words such as up, down, etc. involved in the present application are defined based on the positions of the components shown in the drawings relative to each other, and are only for the purpose of clearly expressing the technical solutions. It should be understood that the orientation words used herein should not limit the scope of the application claimed.

[0022] The electric pump can be applied to an automobile lubricating system and / or cooling system, and can provide circulation power for a working medium in the automobile lubricating system and / or cooling system, which can provide lubricating oil and / or cooling oil for a transmission system. In the present application, "fixed connection of A and B" means that there is no relative displacement between A and B after connection, for example, A and B are fixed by welding; "limiting connection of A and B" means that A limits the movement of B in a certain direction, or B limits the movement of A in a certain direction.

[0023] Please refer to Figure 1 and Figure 2 , the electric pump comprises a pump housing 1, the pump housing 1 comprises a pump cover 14, a motor housing 11 and a bottom cover 12, the pump cover 14 is fixedly connected with the motor housing 11, the motor housing 11 is fixedly connected with the bottom cover 12, the electric pump comprises a pump rotor 4, a motor, a drive shaft 7 and a control assembly 8, the motor comprises a stator assembly 5 and a motor rotor 6, the stator assembly 5 is located on the radial outer side of the motor rotor 6, the drive shaft 7 is in transmission connection with the motor rotor 6, the stator assembly 5 comprises a stator core 51 and a winding 52, during the operation of the electric pump, the control assembly 8 controls the current in the winding 52 of the stator assembly 5 to change according to a predetermined rule, thereby controlling the stator assembly 5 to generate a changing excitation magnetic field, the motor rotor 6 rotates under the action of the excitation magnetic field, and the motor rotor 6 can directly or indirectly drive the pump rotor 4 to rotate, in the embodiment, the drive shaft 7 is in transmission connection with the pump rotor 4 and the motor rotor 6, specifically, one side of the drive shaft 7 is connected with the second rotor 42, and the other side of the drive shaft 7 is connected with the motor rotor 6, the motor rotor 6 drives the second rotor 42 to rotate through the drive shaft 7, so as to realize the rotation of the pump rotor 4. Please refer to Figure 2 , the first rotor 41 is located on the outer periphery of the second rotor 42, and the first rotor 41 and the second rotor 42 are in internal meshing, in other embodiments, the first rotor 41 and the second rotor 42 can also be in external meshing, at this time, the first rotor 41 and the second rotor 42 are arranged side by side. In the embodiment, the center axis of the first rotor 41 is offset from the center axis of the second rotor 42, that is to say, there is a certain eccentricity between the center axis of the first rotor 41 and the center axis of the second rotor 42, when the second rotor 42 rotates, at least part of the outer teeth of the second rotor 42 meshes with at least part of the inner teeth of the first rotor 41, so that the second rotor 42 can drive the first rotor 41 to rotate.

[0024] Please refer to Figure 1 , Figure 1As a schematic view of an embodiment of the electric pump, the pump housing 1 further comprises a partition 13, the motor housing 11 is fixedly connected with the partition 13, and the partition 13 is fixedly connected with the bottom cover 12. The electric pump has a first cavity 20, a second cavity 30 and a third cavity 40, the first cavity 20 communicates with the second cavity 30, the second cavity 30 and the third cavity 40 do not communicate, the pump rotor 4 (or at least part of the pump rotor 4) is located in the first cavity 20, at least part of the control assembly 8, the motor rotor 6 (or at least part of the motor rotor 6), at least part of the drive shaft 7 and the stator assembly 5 (or at least part of the stator assembly 5) are located in the second cavity 30, and the control assembly 8 is located in the third cavity 40. It can be avoided that the working medium affects the control assembly 8. Please refer to Figure 2 , Figure 2 The electric pump has a first cavity 20 and a second cavity 30, the first cavity 20 communicates with the second cavity 30, the pump rotor 4 (or at least part of the pump rotor 4) is located in the first cavity 20, at least part of the control assembly 8, the motor rotor 6 (or at least part of the motor rotor 6), at least part of the drive shaft 7 and the stator assembly 5 (or at least part of the stator assembly 5) are located in the second cavity 30, and the control assembly 8 and the stator assembly 5 are located in the same cavity. It can reduce the size of the electric pump in the axial direction, the structure is compact, and thus the production cost of the electric pump is reduced.

[0025] Please refer to Figures 3 to 9The stator assembly 5 comprises an insulation part 53 fixedly connected with the stator core 51, for example, the insulation part 53 and the stator core 51 are injection molded fixedly connected, the insulation part 53 comprises a neck insulation part 531 and a yoke insulation part 532, the neck insulation part 531 extends from the yoke insulation part 532 towards the direction close to the axis Q of the stator assembly 5, the stator assembly 5 has a winding wire slot 54 located between adjacent neck insulation parts 531, and at least part of the winding 52 is located in the winding wire slot 54; the neck insulation part 531 has a first wall 5311 extending in the direction parallel to the axis Q of the stator assembly, the yoke insulation part 532 comprises an inner side wall 5321, the first wall 5311 is connected with the inner side wall 5321, the slot wall of the winding wire slot 54 comprises the first wall 5311 and at least part of the inner side wall 5321, the yoke insulation part 532 has a guide slot 5323, the slot wall of the guide slot 5323 comprises a guide wall 5323a extending from the inner side wall 5321 away from the axis Q of the stator assembly 5; the first wall 5311 is composed of a first end wall 5311a and a second end wall 5311b, in the direction parallel to the axis Q of the stator assembly 5, the first end wall 5311a is closer to the guide wall 5323a relative to the second end wall 5311b, the height H1 of the first end wall 5311a is equal to the height H2 of the second end wall 5311b; the winding 52 comprises a lead-in segment 52a, the lead-in segment 52a contacts at least part of the first end wall 5311a, the lead-in segment 52a contacts the guide wall 5323a, the lead-in segment 52a can be attached to the first end wall 5311a after passing through the guide slot 5323, and the lead-in segment has a spacing relative to the first end wall in the circumferential direction of the stator assembly (that is, the shortest distance between the lead-in segment and the first end wall in the circumferential direction of the stator assembly is greater than 0), the lead-in segment 52a occupies less space in the winding wire slot 54, thereby facilitating subsequent winding regularity, and further facilitating improvement of the slot fill factor of the stator assembly 5. The yoke insulation part 532 has an outer side wall 5322, the inner side wall 5321 is closer to the axis Q of the stator assembly 5 relative to the outer side wall 5322, the guide slot 5323 has an auxiliary wall 5323b extending from the inner side wall 5321 to the outer side wall 5322; in the circumferential direction of the stator assembly 5, the minimum distance D1 of the auxiliary wall 5323b to the guide wall 5323a is greater than the minimum distance D2 of the first wall 5311 to the guide wall 5323a, in the circumferential direction of the stator assembly 5, the minimum distance of the auxiliary wall 5323b to the guide wall 5323a is relatively large, which can make the lead-in segment 52a have higher lead-in freedom when entering the guide slot 5323; secondly, in the radial direction of the stator assembly 5, the inner side wall 5321 and the outer side wall 5322 have a spacing, since the enameled wire enters the guide slot 5323 through the outer side wall 5322, the guide slot 5323 does not limit the above-mentioned spacing, the radial thickness of the yoke insulation part 532 can be smaller, which is conducive to reducing the material of the yoke insulation part 532; in addition, the manufacturing process of the guide slot 5323 is relatively simple.The yoke insulation portion 532 has a groove 5329 recessed inward from the outer sidewall 5322 to the inner sidewall 5321, which is conducive to the partial enameled wires to run along the groove 5329 during the winding process, so as to avoid the enameled wires to be stacked on the circumferential sidewall of the yoke insulation portion 532 during the winding process.

[0026] The neck insulation portion 531 has a second wall 5312 and a first wire slot 5313, the second wall 5312 is away from the guide wall 5323a relative to the first wall 5311 in the circumferential direction of the stator assembly 5, and the slot wall of the first wire slot 5313 extends from the first wall 5311 to the second wall 5312, and the distance L between the slot wall of the first wire slot 5313 and the inner sidewall 5321 gradually decreases from the first wall 5311 to the second wall 5312 in the radial direction of the stator assembly 5, and the spacing between the slot wall of the first wire slot 5313 and the inner sidewall 5321 can reserve space for the incoming wire segment 52a when the enameled wire starts to be arranged, so that the subsequent enameled wire wound out of the first wire slot 5313 has enough space, thereby facilitating to improve the regularity of the arrangement of the enameled wire, thereby facilitating to improve the slot fill rate; further, the spacing between the slot wall of the first wire slot 5313 and the inner sidewall 5321 is not greater than 1.5 times the wire diameter of the winding 52 in the radial direction of the stator assembly 5, which can reserve space for the incoming wire segment 52a, so that the subsequent enameled wire wound out of the first wire slot 5313 has enough space, thereby facilitating to improve the regularity of the arrangement of the enameled wire, thereby facilitating to improve the slot fill rate. The neck insulation portion 531 has a second wire slot 5314, and the slot wall of the second wire slot 5314 extends from the first wall 5311 to the second wall 5312, and the slot wall of the first wire slot 5313 is closer to the guide wall 5323a relative to the slot wall of the second wire slot 5314 in the axial direction of the stator assembly 5, the winding 52 includes a winding segment 52b connected to the incoming wire segment 52a, part of the winding segment 52b is located in the second wire slot 5314, and part of the winding segment 52b is located in the first wire slot 5313, and the winding segment 52b of the winding 52 can be embedded in the second wire slot 5314 when starting to be wound counterclockwise, so that the enameled wire is constrained and positioned accurately in the initial stage of the arrangement, and the winding segment 52b can be subsequently embedded in the first wire slot 5313, thereby facilitating to improve the regularity of the arrangement of the enameled wire, thereby facilitating to improve the slot fill rate.

[0027] Please refer to Figure 8The insulation part 53 includes a shoe insulation part 533, in the radial direction of the stator assembly 5, a neck insulation part 531 is located between the shoe insulation part 533 and the yoke insulation part 532, in an embodiment, the neck insulation part 531 includes a blank section 5315, which is located between the slot wall of the first wire slot 5313 and the shoe insulation part 533, in the subsequent wire arrangement process, the blank section 5315 provides a wire arrangement position for the enameled wire, and no structure for restricting the enameled wire is arranged in the blank section 5315, that is, the blank section 5315 is a flat position, the part of the enameled wire embedded in the first wire slot 5313 at the first end of the wire arrangement serves as a wire arrangement reference, and the subsequent enameled wire can be constrained by the wire arrangement reference to achieve positioning, the wire arrangement degree of freedom is high, the wire arrangement difficulty is low, and the universality is high.

[0028] Please refer to Figure 3 , Figure 4 and Figure 9The winding 52 includes at least 6 coils, each of which includes an incoming wire segment 52a and an outgoing wire segment 52c. The winding 52 is formed by winding a same enameled wire, and it is noted that the winding of the same enameled wire refers to that the enameled wire is not cut during the winding process. The winding 52 has only two free ends, and the winding 52 is formed by winding a same enameled wire, which is conducive to reducing adverse conditions caused by welding between coils, simplifying the process route of the stator assembly 5, and improving the production yield of the stator assembly 5. In the embodiment, the winding 52 includes a first coil 521, a second coil 522, a third coil 523, a fourth coil 524, a fifth coil 525, and a sixth coil 526. In the radial direction of the stator assembly 5, the first coil 521, the third coil 523, the fifth coil 525, the second coil 522, the fourth coil 524, and the sixth coil 526 are sequentially adjacent, and the sixth coil 526 is adjacent to the first coil 521. When the slot fill rate is high, the power of the motor is large, the above-mentioned coil arrangement can adopt a delta connection, the winding bears a large voltage after starting, and is suitable for high-power circuits. The winding 52 includes an nth connecting wire segment, the nth connecting wire segment connects an outgoing wire segment 52c of an nth coil and an incoming wire segment 52a of an nth+1 coil, and n is a positive integer. In the embodiment, a first connecting wire segment 521a connects the outgoing wire segment 52c of the first coil 521 and the incoming wire segment 52a of the second coil 522; a second connecting wire segment 522a connects the outgoing wire segment 52c of the second coil 522 and the incoming wire segment 52a of the third coil 523; a third connecting wire segment connects the outgoing wire segment 52c of the third coil 523 and the incoming wire segment 52a of the fourth coil 524; a fourth connecting wire segment 524a connects the outgoing wire segment 52c of the fourth coil 524 and the incoming wire segment 52a of the fifth coil 525; and a fifth connecting wire segment 525a connects the outgoing wire segment 52c of the fifth coil 525 and the incoming wire segment 52a of the sixth coil 526. In the axial direction of the stator assembly 5, part of the fourth connecting wire segment 524a is located between part of the fifth connecting wire segment 525a and part of the second connecting wire segment 522a. The yoke insulation portion 532 includes a support portion 5324 located in the guide groove 5323, a support wall 5324a of the support portion 5324 connects the guide wall 5323a, and the incoming wire segment 52a of the sixth coil 526 contacts the support wall 5324a. Relative to the sixth incoming wire segment 52a supported by the second connecting wire segment 522a and the fifth connecting wire segment 525a, this is conducive to reducing the friction between the enameled wires, thereby reducing the risk of damage to the enameled wires and further reducing the risk of short circuit between the enameled wires.

[0029] The yoke insulation part 532 comprises a limiting part 5325, the limiting part 5325 comprises a first subpart 5325a and a second subpart 5325b, the first subpart 5325a is connected with the second subpart 5325b, in the circumferential direction of the stator assembly 5, the length of the first subpart 5325a is less than the length of the second subpart 5325b, the second subpart 5325b has a guide wall 5323a, the partial fifth connecting line segment 525a is located in the first subpart 5325a, the partial second connecting line segment 522a is located in the second subpart 5325b, the length of the first subpart 5325a is smaller, and the length of the first subpart 5325a is equal to the length of the second subpart 5325b, which is beneficial to reduce the material of the yoke insulation part 532; in addition, in the circumferential direction of the stator assembly 5, the partial second subpart 5325b protrudes from the first subpart 5325a, the protruding part of the second subpart 5325b can be used as a positioning mark for the wire-in segment 52a of the fourth coil 524, thereby facilitating to improve the accuracy of winding.

[0030] Please refer to Figure 3 , Figure 4 and Figure 9 , the yoke insulation part 532 comprises a first connector part 5326, a second connector part 5327 and a third connector part 5328, in the circumferential direction of the stator assembly 5, the second connector part 5327 is located between the first connector part 5326 and the third connector part 5328, the electric pump comprises an electric connection part 3, the control assembly 8 comprises a circuit board 81, the electric connection part 3 is electrically connected with the circuit board 81, and the electric connection part 3 is electrically connected with the winding 52. In the embodiment, the electric connection part 3 comprises a first phase electric connection part 31, a second phase electric connection part 32 and a third phase electric connection part 33, the first phase electric connection part 31 is fixedly connected with the first connector part 5326, the second phase electric connection part 32 is fixedly connected with the second connector part 5327, and the third phase electric connection part 33 is fixedly connected with the third connector part 5328, the first phase electric connection part 31 contacts the wire-in segment 52a of the first coil 521 and the wire-out segment 52c of the sixth coil 526; the second phase electric connection part 32 contacts the second connecting line segment 522a; and the third phase electric connection part 33 contacts the fourth connecting line segment 524a.

[0031] The above embodiments only express several embodiments of the present application, and the description is more specific and detailed, but it cannot be understood as limiting the scope of the application. It should be noted that for ordinary skilled in the art, without departing from the concept of the present application, a number of modifications can be made, which are all within the scope of the present application.

Claims

1. A stator assembly characterized by, The stator assembly (5) comprises an insulation part (53) and a winding (52), the insulation part (53) comprises a neck insulation part (531) and a yoke insulation part (532), the neck insulation part (531) extends from the yoke insulation part (532) towards the direction close to the axis (Q) of the stator assembly (5), the stator assembly (5) has winding wire slots (54) located between adjacent neck insulation parts (531), at least part of the winding (52) is located in the winding wire slots (54); the neck insulation part (531) has a first wall (5311) extending in the direction parallel to the axis (Q) of the stator assembly (5), the yoke insulation part (532) comprises an inner side wall (5321), the first wall (5311) is connected to the inner side wall (5321), the slot wall of the winding wire slot (54) comprises the first wall (5311) and at least part of the inner side wall (5321), the yoke insulation part (532) has a guide slot (5323), the slot wall of the guide slot (5323) comprises a guide wall (5323a), the guide wall (5323a) extends from the inner side wall (5321) away from the axis (Q) of the stator assembly (5); the first wall (5311) is composed of a first end wall (5311a) and a second end wall (5311b), in the direction parallel to the axis (Q) of the stator assembly (5), the first end wall (5311a) is closer to the guide wall (5323a) than the second end wall (5311b), the height (H1) of the first end wall (5311a) is equal to the height (H2) of the second end wall (5311b); the winding (52) comprises a wire entry section (52a), the wire entry section (52a) contacts at least part of the first end wall (5311a), the wire entry section (52a) contacts the guide wall (5323a).

2. The stator assembly of claim 1, wherein, The neck insulation part (531) has a second wall (5312) and a first wire slot (5313), in the circumferential direction of the stator assembly (5), the second wall (5312) is away from the guide wall (5323a) relative to the first wall (5311), the slot wall of the first wire slot (5313) extends from the first wall (5311) to the second wall (5312), from the first wall (5311) to the second wall (5312), in the radial direction of the stator assembly (5), the distance (L) of the slot wall of the first wire slot (5313) to the inner side wall (5321) gradually decreases.

3. The stator assembly of claim 2, wherein, The neck insulation portion (531) has a second wire slot (5314), a slot wall of the second wire slot (5314) extending from the first wall (5311) to the second wall (5312), in a direction parallel to an axis (Q) of the stator assembly (5), the slot wall of the first wire slot (5313) is closer to the guide wall (5323a) relative to the slot wall of the second wire slot (5314), the winding (52) comprises a winding segment (52b), the winding segment (52b) connecting the incoming wire segment (52a), part of the winding segment (52b) is located in the second wire slot (5314), and part of the winding segment (52b) is located in the first wire slot (5313).

4. The stator assembly of claim 2 or 3, wherein, The insulation portion (53) comprises a shoe insulation portion (533), in a radial direction of the stator assembly (5), the neck insulation portion (531) is located between the shoe insulation portion (533) and the yoke insulation portion (532), and the neck insulation portion (531) comprises a blank section (5315) located between the slot wall of the first wire slot (5313) and the shoe insulation portion (533).

5. A stator assembly according to any one of claims 1 to 3, wherein, The yoke insulation portion (532) has an outer side wall (5322), the inner side wall (5321) is closer to the axis (Q) of the stator assembly (5) relative to the outer side wall (5322), the guide slot (5323) has an auxiliary wall (5323b), the auxiliary wall (5323b) extends from the inner side wall (5321) to the outer side wall (5322); in a circumferential direction of the stator assembly (5), the minimum distance (D1) from the auxiliary wall (5323b) to the guide wall (5323a) is greater than the minimum distance (D2) from the first wall (5311) to the guide wall (5323a).

6. The stator assembly of claim 4, wherein, The yoke insulation portion (532) has an outer side wall (5322), the inner side wall (5321) is closer to the axis (Q) of the stator assembly (5) relative to the outer side wall (5322), the guide slot (5323) has an auxiliary wall (5323b), the auxiliary wall (5323b) extends from the inner side wall (5321) to the outer side wall (5322); in a circumferential direction of the stator assembly (5), the minimum distance (D1) from the auxiliary wall (5323b) to the guide wall (5323a) is greater than the minimum distance (D2) from the first wall (5311) to the guide wall (5323a).

7. A stator assembly according to any one of claims 1 to 3, 6, wherein, The winding (52) comprises a first coil (521), a second coil (522), a third coil (523), a fourth coil (524), a fifth coil (525) and a sixth coil (526), in a circumferential direction of the stator assembly (5), the first coil (521), the third coil (523), the fifth coil (525), the second coil (522), the fourth coil (524), and the sixth coil (526) are sequentially adjacent, and the sixth coil (526) is adjacent to the first coil (521).

8. The stator assembly of claim 4, wherein, The winding (52) comprises a first coil (521), a second coil (522), a third coil (523), a fourth coil (524), a fifth coil (525) and a sixth coil (526), and in the circumferential direction of the stator assembly (5), the first coil (521), the third coil (523), the fifth coil (525), the second coil (522), the fourth coil (524) and the sixth coil (526) are sequentially adjacent, and the sixth coil (526) is adjacent to the first coil (521).

9. The stator assembly of claim 5, wherein, The winding (52) comprises a first coil (521), a second coil (522), a third coil (523), a fourth coil (524), a fifth coil (525) and a sixth coil (526), and in the circumferential direction of the stator assembly (5), the first coil (521), the third coil (523), the fifth coil (525), the second coil (522), the fourth coil (524) and the sixth coil (526) are sequentially adjacent, and the sixth coil (526) is adjacent to the first coil (521).

10. The stator assembly of claim 7, wherein, The winding (52) comprises a second connecting segment (522a), a fourth connecting segment (524a) and a fifth connecting segment (525a), the second connecting segment (522a) connects the outgoing segment (52c) of the second coil (522) and the incoming segment (52a) of the third coil (523), the fourth connecting segment (524a) connects the outgoing segment (52c) of the fourth coil (524) and the incoming segment (52a) of the fifth coil (525), and the fifth connecting segment (525a) connects the outgoing segment (52c) of the fifth coil (525) and the incoming segment (52a) of the sixth coil (526), and in the axial direction of the stator assembly (5), part of the fourth connecting segment (524a) is located between part of the fifth connecting segment (525a) and part of the second connecting segment (522a), the yoke insulation portion (532) comprises a support portion (5324), the support portion (5324) is located in the guide groove (5323), a support wall (5324a) of the support portion (5324) is connected to the guide wall (5323a), and the incoming segment (52a) of the sixth coil (526) contacts the support wall (5324a).

11. A stator assembly according to claim 8 or 9, characterised in that, The winding (52) comprises a second connecting segment (522a), a fourth connecting segment (524a) and a fifth connecting segment (525a), the second connecting segment (522a) connects the outgoing wire segment (52c) of the second coil (522) and the incoming wire segment (52a) of the third coil (523), the fourth connecting segment (524a) connects the outgoing wire segment (52c) of the fourth coil (524) and the incoming wire segment (52a) of the fifth coil (525), the fifth connecting segment (525a) connects the outgoing wire segment (52c) of the fifth coil (525) and the incoming wire segment (52a) of the sixth coil (526), in the axial direction of the stator assembly (5), part of the fourth connecting segment (524a) is located between part of the fifth connecting segment (525a) and part of the second connecting segment (522a), the yoke insulation part (532) comprises a support part (5324), the support part (5324) is located in the guide groove (5323), a support wall (5324a) of the support part (5324) connects the guide wall (5323a), the incoming wire segment (52a) of the sixth coil (526) contacts the support wall (5324a).

12. The stator assembly of claim 10, wherein, The winding comprises a third connecting segment (523a), the third connecting segment (523a) connects the outgoing wire segment (52c) of the third coil (523) and the incoming wire segment (52a) of the fourth coil (524), in the axial direction of the stator assembly (5), part of the third connecting segment (523a) is located between part of the second connecting segment (522a) and part of the fifth connecting segment (525a), the yoke insulation part (532) comprises a limiting part (5325), the limiting part (5325) comprises a first subpart (5325a) and a second subpart (5325b), the first subpart (5325a) connects the second subpart (5325b), in the circumferential direction of the stator assembly (5), the length of the first subpart (5325a) is less than the length of the second subpart (5325b), the second subpart (5325b) has the guide wall (5323a), part of the fifth connecting segment (525a) is located in the first subpart (5325a), and part of the second connecting segment (522a) is located in the second subpart (5325b).

13. The stator assembly of claim 11, wherein, The winding comprises a third connecting segment (523a) connecting an outgoing segment (52c) of the third coil (523) and an incoming segment (52a) of the fourth coil (524), in the axial direction of the stator assembly (5), part of the third connecting segment (523a) is located between part of the second connecting segment (522a) and part of the fifth connecting segment (525a), the yoke insulation portion (532) comprises a limiting portion (5325), the limiting portion (5325) comprises a first sub-portion (5325a) and a second sub-portion (5325b), the first sub-portion (5325a) is connected to the second sub-portion (5325b), in the circumferential direction of the stator assembly (5), the length of the first sub-portion (5325a) is less than the length of the second sub-portion (5325b), the second sub-portion (5325b) has the guide wall (5323a), part of the fifth connecting segment (525a) is located in the first sub-portion (5325a), and part of the second connecting segment (522a) is located in the second sub-portion (5325b).

14. An electric machine characterized by The motor comprises a stator assembly (5) and a motor rotor (6) located radially inside the stator assembly (5), the stator assembly (5) comprising an insulation part (53) and a winding (52), the insulation part (53) comprising a neck insulation part (531) and a yoke insulation part (532), the neck insulation part (531) extending from the yoke insulation part (532) towards the axis (Q) of the stator assembly (5), the stator assembly (5) having winding wire slots (54) located between adjacent neck insulation parts (531), at least part of the winding (52) being located in the winding wire slots (54); the neck insulation part (531) having a first wall (5311) extending in a direction parallel to the axis (Q) of the stator assembly (5), the yoke insulation part (532) comprising an inner wall (5321), the first wall (5311) connecting the inner wall (5321), the slot wall of the winding wire slots (54) comprising the first wall (5311) and at least part of the inner wall (5321), the yoke insulation part (532) having a guide slot (5323), the slot wall of the guide slot (5323) comprising a guide wall (5323a) extending from the inner wall (5321) away from the axis (Q) of the stator assembly (5); the first wall (5311) consisting of a first end wall (5311a) and a second end wall (5311b), in a direction parallel to the axis (Q) of the stator assembly (5), the first end wall (5311a) being closer to the guide wall (5323a) than the second end wall (5311b), the height of the first end wall (5311a) being equal to the height of the second end wall (5311b); the winding (52) comprising a wire entry section (52a), the wire entry section (52a) contacting at least part of the first end wall (5311a), the wire entry section (52a) contacting the guide wall (5323a).

15. An electric pump characterized in that, The electric pump comprises a pump rotor (4), a stator assembly (5), a drive shaft (7) and a motor rotor (6), the pump rotor (4) is in driving connection with the drive shaft (7), the motor rotor (6) is in driving connection with the drive shaft (7), the motor rotor (6) is located at the radial inner side of the stator assembly (5), the stator assembly (5) comprises an insulation part (53) and a winding (52), the insulation part (53) comprises a neck insulation part (531) and a yoke insulation part (532), the neck insulation part (531) extends from the yoke insulation part (532) to the direction close to the axis (Q) of the stator assembly (5), the stator assembly (5) has a winding wire slot (54), the winding wire slot (54) is located between adjacent neck insulation parts (531), at least part of the winding (52) is located in the winding wire slot (54); the neck insulation part (531) has a first wall (5311) extending in the direction parallel to the axis (Q) of the stator assembly (5), the yoke insulation part (532) comprises an inner side wall (5321), the first wall (5311) is connected to the inner side wall (5321), the slot wall of the winding wire slot (54) comprises the first wall (5311) and at least part of the inner side wall (5321), the yoke insulation part (532) has a guide slot (5323), the slot wall of the guide slot (5323) comprises a guide wall (5323a), the guide wall (5323a) extends from the inner side wall (5321) away from the axis (Q) of the stator assembly (5); the first wall (5311) is composed of a first end wall (5311a) and a second end wall (5311b), in the direction parallel to the axis (Q) of the stator assembly (5), the first end wall (5311a) is close to the guide wall (5323a) relative to the second end wall (5311b), the height of the first end wall (5311a) is equal to the height of the second end wall (5311b); the winding (52) comprises a wire entry section (52a), the wire entry section (52a) contacts at least part of the first end wall (5311a), the wire entry section (52a) contacts the guide wall (5323a).

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