CN222339094U - Stator structure of motor and motor - Google Patents

Abstract

The utility model discloses a stator structure of a motor and the motor, wherein the stator structure comprises a stator core, the stator core is annular, a stator groove for installing a winding coil is formed in the inner peripheral wall of the stator core, the stator groove extends along the axial direction of the stator core, an oil passing groove is formed in the outer peripheral wall of the stator core, and a communication oil duct is formed in the stator core and is communicated with the oil passing groove and the stator groove. According to the stator structure provided by the embodiment of the utility model, the stator core, the stator groove, the oil passing groove and the communication oil duct are arranged, so that the stator structure of the motor can cool the stator core and the end winding during cooling, and meanwhile, the winding coil in the stator groove can be directly cooled in a contact manner, thereby being beneficial to improving the cooling effect of the motor.

Description

Stator structure of motor and motor

Technical Field

The present utility model relates to the field of motors, and in particular, to a stator structure of a motor and a motor having the same.

Background

In the related art, as the motor for the automobile is increasingly required to have high power density in the development process of recent years, the working temperature of the motor is required to be kept in a lower temperature range, so that the cooling capability of the motor is particularly important, the existing motor stator generally adopts a core cooling and end winding cooling mode, and an in-slot winding coil is used as one of main heating sources of the motor, but the existing motor stator cooling mode cannot directly cool the in-slot winding coil of the stator of the motor, so that the cooling effect of the existing motor is generally poor.

Disclosure of utility model

The present utility model aims to solve at least one of the technical problems existing in the prior art. Therefore, an object of the present utility model is to provide a stator structure, which can cool not only a stator core and an end winding, but also a stator slot inner winding coil of the stator structure in a direct contact manner, so that a cooling effect of a motor is better.

The utility model also provides a motor using the stator structure.

The stator structure comprises a stator core, wherein the stator core is annular, a stator groove used for installing a winding coil is formed in the inner peripheral wall of the stator core, the stator groove extends along the axial direction of the stator core, an oil passing groove is formed in the outer peripheral wall of the stator core, and a communication oil duct is formed in the stator core and is communicated with the oil passing groove and the stator groove.

According to the stator structure provided by the embodiment of the application, the stator core is annular, the stator groove is arranged on the inner peripheral wall of the stator core and is used for installing the winding coil, the oil passing groove is arranged on the outer peripheral wall of the stator core and is communicated with the oil inlet on the motor shell, the oil passing groove is arranged in the stator core and is communicated with the oil passing groove, in the cooling process, a cooling medium flows into the oil passing groove through the oil inlet on the motor shell and then flows into the oil passing groove in the stator core, part of the cooling medium flows out and sprays on the end winding of the stator core through the oil passing groove, and meanwhile, part of the cooling medium flows through the stator groove to cool the winding coil arranged in the stator groove, so that the stator structure of the motor can cool the stator core and the end winding coil in a direct contact manner during cooling, the cooling effect of the motor is improved, and the working efficiency of the motor is improved.

According to some embodiments of the utility model, the communication oil passage is provided with a first sub oil passage and a second sub oil passage, the first sub oil passage and the second sub oil passage are respectively positioned at two sides of the oil passing groove along the axial direction of the stator core, and the first sub oil passage and the second sub oil passage are both communicated with the oil passing groove and the stator groove.

According to some embodiments of the utility model, the end of the first sub oil passage facing the oil passing groove is communicated with the oil passing groove, the end of the first sub oil passage facing away from the oil passing groove is communicated with the stator groove, the end of the second sub oil passage facing the oil passing groove is communicated with the oil passing groove, and the end of the second sub oil passage facing away from the oil passing groove is communicated with the stator groove.

According to some embodiments of the utility model, the stator slots and the communication oil channels are all multiple, the stator slots and the communication oil channels are all sequentially distributed along the circumferential direction of the stator core, the stator slots and the communication oil channels are in one-to-one correspondence communication, and the oil passing groove is annular, extends along the circumferential direction of the stator core and is communicated with the communication oil channels.

According to some embodiments of the utility model, the stator core includes a plurality of core laminations, the plurality of core laminations being stacked in an axial direction of the stator core, the plurality of core laminations forming a middle core lamination group and two end core lamination groups, the middle core lamination group being located between the two end core lamination groups, the middle core lamination group and the two end core lamination groups together defining the oil passage, the two end core lamination groups each being formed with the communication oil passage.

According to some embodiments of the utility model, the outer diameter of the middle core lamination stack is smaller than the outer diameters of the two end core lamination stacks to define the oil passage groove.

According to some embodiments of the utility model, at least one of the end core lamination groups includes a plurality of core laminations, each of the core laminations having an oil guide hole, the oil guide holes of the plurality of core laminations of the end core lamination group communicating to form part of the communication oil passage.

According to some embodiments of the utility model, in the axial direction of the stator core, orthographic projection portions of the respective two oil guide holes of the adjacent two core laminations overlap.

According to some embodiments of the utility model, the oil guide holes are spaced from the center line of the corresponding core laminations in a direction from the middle core lamination stack to the end core lamination stack by a gradually decreasing distance.

An electric machine according to an embodiment of the second aspect of the present utility model comprises the stator structure described in the above embodiment.

Additional aspects and advantages of the utility model will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model.

Drawings

The foregoing and/or additional aspects and advantages of the utility model will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:

Fig. 1 is a schematic view of an angle of a stator core according to an embodiment of the present application;

FIG. 2 is a schematic illustration of an angle of a stator structure according to an embodiment of the application;

fig. 3 is a cross-sectional view of an electric machine according to an embodiment of the application;

FIG. 4 is an enlarged partial schematic view of area A of FIG. 3;

Fig. 5 is an exploded view of a core lamination stack according to an embodiment of the application;

FIG. 6 is a schematic diagram of oil spray cooling of stator core end windings according to an embodiment of the present application;

FIG. 7 is a partially enlarged schematic illustration of region B of FIG. 6;

Fig. 8 is a front view of a first core lamination according to an embodiment of the application;

FIG. 9 is an enlarged partial schematic view of region C of FIG. 8;

Fig. 10 is a front view of a second core lamination according to an embodiment of the application;

fig. 11 is a front view of a third core lamination according to an embodiment of the application;

fig. 12 is a front view of a fourth core lamination according to an embodiment of the application;

fig. 13 is a front view of a fifth core lamination according to an embodiment of the application.

Reference numerals:

a stator structure 1, an oil inlet 2, a motor 3,

The stator core 10,

The stator groove 20 is provided with a plurality of grooves,

Through the oil groove 30,

The communication oil passage 40, the first sub-oil passage 41, the second sub-oil passage 42,

The end windings 50 are arranged such that,

The core lamination 60, the oil guide hole 61,

The center core lamination stack 11, the fifth core lamination 111,

The end core lamination stack 12, the first core lamination 121, the second core lamination 122, the third core lamination 123, the fourth core lamination 124,

Winding coil 70.

Detailed Description

Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the utility model.

A stator structure 1 according to an embodiment of the present utility model, the stator structure 1 being mounted on an electric machine 3, is described below with reference to fig. 1-13.

The stator structure 1 according to the embodiment of the first aspect of the present utility model includes a stator core 10, the stator core 10 having a ring shape, an inner circumferential wall of the stator core 10 being formed with a stator slot 20 for mounting a winding coil 70, the stator slot 20 extending in an axial direction of the stator core 10, an outer circumferential wall of the stator core 10 being formed with an oil passage 30, a communication oil passage 40 being formed in the stator core 10, the communication oil passage 40 communicating the oil passage 30 and the stator slot 20.

It should be noted that, in the prior art, the cooling oil circuit of the motor stator structure is designed to be far away from the stator slot inner winding coil of the stator core, the cooling medium can act on the stator core and the end winding of the motor, but cannot directly act on the stator slot inner winding coil to cool the stator slot inner winding coil, however, the stator slot inner winding coil is one of main heating sources of the motor, and cannot precisely cool the stator slot inner winding coil to cause the cooling effect of the motor stator structure to be generally worse, so that the working efficiency of the motor is affected.

Based on this, the embodiment of the present application proposes a stator structure 1, in which a stator core 10, stator slots 20, oil passing slots 30 and a communication oil channel 40 are provided, as shown in fig. 1, the stator core 10 is in an annular structure, the inner peripheral wall of the stator core 10 is provided with a plurality of stator slots 20, each stator slot 20 extends along the axial direction of the stator core 10, the plurality of stator slots 20 can be uniformly distributed and spaced apart from each other along the circumferential direction of the stator core 10, the spacing distances between two adjacent stator slots 20 are equal, when the stator core 10 is placed in the direction in fig. 1, the axial direction of the stator core 10 is the X direction in fig. 1, the stator slots 20 are used for installing winding coils 70, the oil passing slots 30 are provided on the outer peripheral wall of the stator core 10, the oil passing slots 30 can be in an annular structure extending along the circumferential direction of the stator core 10, and the communication oil channel 40 is provided in the stator core 10 and communicates the oil passing slots 30 with the stator slots 20.

In the embodiment of the application, as shown in fig. 3 and 4, an oil inlet 2 is formed on a motor housing and is used for inputting a cooling medium into a stator structure 1, an oil passing groove 30 is communicated with the oil inlet 2 on the motor housing, in the cooling process, the cooling medium enters the oil passing groove 30 through the oil inlet 2 and flows into a communication oil duct 40 in a stator core 10, part of the cooling medium flows out and sprays on an end winding 50 of the stator core 10 through the communication oil duct 40 (as shown in fig. 6), and meanwhile, part of the cooling medium flows through a stator slot 20 to cool a winding coil 70 arranged in the stator slot 20, so that the stator structure 1 of the motor 3 can cool the stator core 10 and the end winding 50 in a direct contact manner during cooling, the cooling effect of the motor 3 is better, and the working efficiency of the motor 3 is improved.

It should be noted that, the cooling medium in the embodiment of the application is generally cooling oil, and the advantage of using oil cooling is that the cooling oil can directly contact the heating part of the motor 3, the stator structure 1 of the motor 3 is immersed into the cooling oil for cooling, the heat dissipation effect is relatively good, and the oil medium has the characteristics of good thermal conductivity, good insulativity, low freezing point, high boiling point and the like, so that the cooling effect of the motor 3 is better.

In some embodiments of the present utility model, the communication oil passage 40 may have a first sub-oil passage 41 and a second sub-oil passage 42, the first sub-oil passage 41 and the second sub-oil passage 42 being located at both sides of the oil passing groove 30, respectively, in the axial direction of the stator core 10, and the first sub-oil passage 41 and the second sub-oil passage 42 being communicated with the oil passing groove 30 and the stator groove 20.

As shown in fig. 3 and 4, the communication oil passage 40 may extend along the axial direction of the stator core 10 and be disposed inside the stator core 10, the communication oil passage 40 is divided into a first sub-oil passage 41 and a second sub-oil passage 42 along the axial direction of the stator core 10, the first sub-oil passage 41 and the second sub-oil passage 42 are respectively located at both sides of the oil passing groove 30, the first sub-oil passage 41 and the second sub-oil passage 42 are both communicated with the oil passing groove 30 and the stator groove 20, one end of the first sub-oil passage 41 is communicated with the oil passing groove 30, and the other end is communicated with the stator groove 20. Similarly, the second sub oil passage 42 has one end communicating with the oil passage 30 and the other end communicating with the stator groove 20. In the cooling process, after the cooling medium flows into the oil groove 30, the first sub-oil duct 41 and the second sub-oil duct 42 play a role in shunting, guide the cooling medium to two sides of the oil groove 30 respectively, and flow to the stator groove 20 and the end winding 50 of the stator structure 1 through the first sub-oil duct 41 and the second sub-oil duct 42, so that the cooling medium can be more efficiently transmitted, the cooling efficiency of the motor 3 is higher, and the cooling effect is better.

In some embodiments of the present utility model, the end of the first sub-oil passage 41 facing the oil passing groove 30 communicates with the oil passing groove 30, the end of the first sub-oil passage 41 facing away from the oil passing groove 30 communicates with the stator groove 20, the end of the second sub-oil passage 42 facing the oil passing groove 30 communicates with the oil passing groove 30, and the end of the second sub-oil passage 42 facing away from the oil passing groove 30 communicates with the stator groove 20.

As shown in fig. 3 and 4, the first sub-oil passage 41 and the second sub-oil passage 42 are distributed on both sides of the oil passing groove 30 and are away from each other, the first sub-oil passage 41 communicates with the oil passing groove 30 and the stator groove 20, and along the axial direction of the stator core 10, the end of the first sub-oil passage 41 facing the oil passing groove 30 communicates with the oil passing groove 30, and the end of the first sub-oil passage 41 facing away from the oil passing groove 30 communicates with the stator groove 20. Similarly, the second sub-oil passage 42 communicates with the oil passage 30 and the stator slot 20, and along the axial direction of the stator core 10, the end of the second sub-oil passage 42 facing the oil passage 30 communicates with the oil passage 30, and the end of the second sub-oil passage 42 facing away from the oil passage 30 communicates with the stator slot 20. The cooling medium may enter the stator core 10 through only the first sub-oil passage 41, or the cooling medium may enter the stator core 10 through only the second sub-oil passage 42, or the cooling medium may enter the stator core 10 through both the first sub-oil passage 41 and the second sub-oil passage 42, and the embodiment of the present application will be described by taking the cooling medium through both the first sub-oil passage 41 and the second sub-oil passage 42 as an example.

In the cooling process, the cooling medium flows into the first sub oil passage 41 and the second sub oil passage 42 from the end part of the first sub oil passage 41 and the second sub oil passage 42, which is close to the oil passing groove 30, flows into the first sub oil passage 41 and the second sub oil passage 42, and flows into the first sub oil passage 41 and the second sub oil passage 42, which deviate from the direction of the end part of the oil passing groove 30, part of the cooling medium flows into the stator slot 20 after flowing out of the first sub oil passage 41 and the second sub oil passage 42 to cool the winding coil 70 in the stator slot 20, and part of the cooling medium is sprayed on the end winding 50 of the stator core 10 to cool the same, and the cooling medium flows into the stator slot 20 through the first sub oil passage 41 and the second sub oil passage 42 to cool the winding coil 70 in the stator slot 20, so that the cooling time is shorter, the cooling efficiency of the motor 3 is higher, and the cooling effect is better.

In some embodiments of the present utility model, the stator slots 20 and the communication oil channels 40 are multiple, the stator slots 20 and the communication oil channels 40 are sequentially arranged along the circumferential direction of the stator core 10, the stator slots 20 and the communication oil channels 40 are in one-to-one correspondence, the oil passing groove 30 is annular, and the oil passing groove 30 extends along the circumferential direction of the stator core 10 and is communicated with the communication oil channels 40.

As shown in fig. 1, the number of the stator slots 20 and the number of the communication oil passages 40 are multiple, in the embodiment of the present application, the number of the stator slots 20 and the number of the communication oil passages 40 are the same, the plurality of stator slots 20 and the plurality of communication oil passages 40 can be uniformly distributed along the circumferential direction of the stator core 10 at equal intervals, the stator slots 20 and the communication oil passages 40 are in one-to-one correspondence in the radial direction of the stator core 10, and the stator slots 20 are communicated with the corresponding communication oil passages 40, so that the one-to-one correspondence between the plurality of stator slots 20 and the plurality of communication oil passages 40 is realized. The plurality of communication oil ducts 40 are uniformly distributed on the circumference of the stator core 10 and are communicated with the plurality of stator slots 20 in a one-to-one correspondence manner, in the cooling process, a cooling medium can uniformly flow into the plurality of stator slots 20 simultaneously through the plurality of communication oil ducts 40, and the simultaneous cooling of the winding coils 70 in the plurality of stator slots 20 in the circumference of the stator core 10 is realized, so that the cooling efficiency is higher, and the cooling effect is better and more stable.

As shown in fig. 2, the oil passing groove 30 is an annular structure extending along the circumferential direction of the stator core 10, the oil passing groove 30 is provided on the outer circumferential wall of the stator core 10, a plurality of communication oil passages 40 are provided in the stator core 10, the plurality of communication oil passages 40 are uniformly distributed along the circumferential direction of the stator core 10, cooling medium flows from the oil passing groove 30 to the communication oil passages 40, cooling of the winding coil 70 in the stator groove 20 and the end winding 50 of the stator core 10 in the stator core 10 by the cooling medium is completed, and the cooling effect of the motor 3 is improved.

In some embodiments of the present utility model, the stator core 10 may include a plurality of core laminations 60, the plurality of core laminations 60 being stacked in an axial direction of the stator core 10, the plurality of core laminations 60 forming a middle core lamination stack 11 and two end core lamination stacks 12, the middle core lamination stack 11 being positioned between the two end core lamination stacks 12, the middle core lamination stack 11 and the two end core lamination stacks 12 together defining the oil passage 30, the two end core lamination stacks 12 each being formed with the communication oil passage 40.

The stator core 10 may include a plurality of core laminations 60, the plurality of core laminations 60 being stacked in an axial direction of the stator core 10 to form the stator core 10, the plurality of core laminations 60 forming a center core lamination stack 11 and two end core lamination stacks 12, the center core lamination stack 11 including at least one core lamination 60, the end core lamination stack 12 including at least one core lamination 60, the center core lamination stack 11 being located between the two end core lamination stacks 12, the present application being described in terms of the core laminations 60 of the two end core lamination stacks 12 including the same number of core laminations 60, the core laminations 60 of the two end core lamination stacks 12 being symmetrical about the center core lamination stack 11.

In the embodiment of the present application, as shown in fig. 5, the present application is illustrated by taking an example in which two end core lamination groups 12 each include 4 core laminations 60 and a middle core lamination group 11 includes 1 core lamination 60, the plurality of core laminations 60 of each end core lamination group 12 are stacked in the axial direction of the stator core 10, and the plurality of core laminations 60 of each end core lamination group 12 includes a first core lamination 121, a second core lamination 122, a third core lamination 123, and a fourth core lamination 124. The middle core lamination group 11 includes 1 core lamination 60 and is denoted as a fifth core lamination 111, and the two end core lamination groups 12 have the same structure and are symmetrically arranged on both sides of the middle core lamination group 11. The first core lamination 121 is structured as shown in fig. 8, the second core lamination 122 is structured as shown in fig. 10, the third core lamination 123 is structured as shown in fig. 11, the fourth core lamination 124 is structured as shown in fig. 12, and the fifth core lamination 111 is structured as shown in fig. 13. The stator slots with the same number are arranged on each core lamination 60, the stator slots on the core laminations 60 are communicated in a one-to-one correspondence manner, and after the core laminations 60 are laminated, the stator slots 20 are formed by the corresponding stator slots on the core laminations 60.

The middle core lamination group 11 and the two end core lamination groups 12 together define a through oil groove 30, as shown in fig. 7, the outer peripheral wall of the middle core lamination group 11 and the side walls of the core laminations 60 adjacent to the middle core lamination group 11 in the two end core lamination groups 12 together form an annular through oil groove 30, specifically, in the embodiment of the application, the fifth core lamination 111 and the two fourth core laminations 124 together define the through oil groove 30, the through oil groove 30 is communicated with an oil inlet 2 provided on the motor housing, the through oil groove 30 is communicated with a communication oil duct 40 in the stator core 10, and a cooling medium flows into the communication oil duct 40 after entering the through oil groove 30 through the oil inlet 2, so as to realize further cooling of the stator structure 1.

Both end core lamination packs 12 may form a communication oil passage 40, for example, one end core lamination pack 12 forming a first sub-oil passage 41 and the other end core lamination pack 12 forming a second sub-oil passage 42. As shown in fig. 6, during the cooling process, the cooling medium flows into the communication oil duct 40 in the stator core 10 after entering the oil groove 30, part of the cooling medium flows out through the communication oil duct 40 to be sprayed on the end winding 50 of the stator core 10, and part of the cooling medium flows into the stator groove 20 to cool the winding coil 70 installed in the stator groove 20, so that the stator structure 1 of the motor 3 can cool not only the stator core 10 and the end winding 50 but also the winding coil 70 in the stator groove 20 in direct contact cooling during cooling, which is beneficial to improving the cooling effect of the motor 3.

In some embodiments of the present utility model, as shown in fig. 7-13, the outer diameter of the middle core lamination stack 11 is smaller than the outer diameters of the two end core lamination stacks 12 to define the oil passage 30.

As shown in fig. 7, the outer diameter of the middle core lamination stack 11 is smaller than the outer diameters of the two end core lamination stacks 12, the middle core lamination stack 11 is located between the two end core lamination stacks 12, and the middle core lamination stack 11 and the two end core lamination stacks 12 together define the oil passage 30. Specifically, as shown in fig. 6 and fig. 7, in the embodiment of the present application, two fourth core laminations 124 and the fifth core laminations 111 together define the oil passing groove 30, as shown in fig. 8 to fig. 13, the outer diameter dimensions of the first core lamination 121, the second core lamination 122, the third core lamination 123 and the fourth core lamination 124 are the same, the outer diameter dimension of the fifth core lamination 111 is smaller than the outer diameter dimensions of the other core laminations 60, and because the outer diameter dimension of the fifth core lamination 111 is small, an annular oil passing groove 30 is formed on the outer peripheral wall of the stator core 10, the oil passing groove 30 is communicated with the oil inlet 2 provided on the motor housing, the oil passing groove 30 is communicated with the communication oil duct 40 in the stator core 10, after entering the stator structure 1 from the oil inlet 2, a part of the cooling medium flows out of the communication oil duct 40 and is sprayed on the end winding 50 of the stator core 10, a part of the cooling medium enters the stator slot 20, and directly contacts and cools the end winding coil 50 of the stator core 20 and the coil 70 of the stator core 20, thereby achieving synchronous cooling of the end winding 50 of the stator 10 and the motor 70 of the stator core 20, and the cooling effect of the motor 3 is improved, and the cooling effect is improved.

In some embodiments of the present utility model, at least one end core lamination stack 12 includes a plurality of core laminations 60, each core lamination 60 having an oil guide hole 61, the oil guide holes 61 of the plurality of core laminations 60 of the end core lamination stack 12 communicating to form part of the communication oil passage 40.

One end core stack 12 includes a plurality of core laminations 60 or both end core stacks 12 include a plurality of core laminations 60, the present application is illustrated with two end core stacks 12 each including a plurality of core laminations 60. The plurality of core laminations 60 each have an oil guide hole 61, and the oil guide holes 61 of the plurality of core laminations 60 of the end core lamination stack 12 communicate to form a portion of the communication oil passage 40, for example, the oil guide holes 61 of the plurality of core laminations 60 of one end core lamination stack 12 communicate to form the first sub-oil passage 41 and the oil guide holes 61 of the plurality of core laminations 60 of the other end core lamination stack 12 communicate to form the second sub-oil passage 42.

As shown in fig. 8 to 13, each core lamination 60 of the end core lamination stack 12 has an oil guide hole 61, and each oil guide hole 61 may have the same size, the oil guide holes 61 of the first core lamination 121 are communicated with the stator slot 20, the oil guide holes 61 of the second core lamination 122, the third core lamination 123, and the fourth core lamination 124 are spaced apart from the stator slot 20 in a radial direction, the radial distances between the oil guide holes 61 of the second core lamination 122, the third core lamination 123, and the fourth core lamination 124 and the stator slot 20 sequentially increase, and the radial distances may be sequentially set to D2, D3, and D4, thereby satisfying the relationship D2< D3< D4. The oil hole 61 on the fourth core lamination 124, the oil hole 61 on the third core lamination 123, the oil hole 61 on the second core lamination 122, and the oil hole 61 on the first core lamination 121 communicate in the axial direction of the stator core 10 to form the communication oil passage 40.

In the cooling process, after the cooling medium flows into the communication oil duct 40 formed by the oil guide hole 61 on the fourth core lamination 124, the oil guide hole 61 on the third core lamination 123, the oil guide hole 61 on the second core lamination 122 and the oil guide hole 61 on the first core lamination 121 from the oil through groove 30, part of the cooling medium is communicated with the stator slot 20 by the oil guide hole 61 on the first core lamination 121 so as to enter the stator slot 20 to perform direct contact cooling on the winding coil 70 in the stator slot 20, and part of the cooling medium flows out from the communication oil duct 40 to be sprayed on the end winding 50 of the stator core 10, so that synchronous cooling on the end winding 50 of the stator core 10 and the winding coil 70 in the stator slot 20 is realized, the cooling efficiency of the motor 3 is improved, and the cooling effect of the motor 3 is improved.

In some embodiments of the present utility model, as shown in fig. 4, the orthographic projection portions of the respective two oil guide holes 61 of the adjacent two core laminations 60 overlap in the axial direction of the stator core 10.

As shown in fig. 3 and 4, for the end core lamination stack 12, the oil holes 61 of the adjacent two core laminations 60 are not completely in communication with each other in the axial direction of the stator core 10, are partially offset in the radial direction of the stator core 10, the oil holes 61 of the fourth core lamination 124 and the oil holes 61 of the third core lamination 123 have overlapping areas in the orthographic projection in the axial direction of the stator core 10, the oil holes 61 of the third core lamination 123 and the oil holes 61 of the second core lamination 122 have overlapping areas in the orthographic projection in the axial direction of the stator core 10, the oil holes 61 of the second core lamination 122 and the oil holes 61 of the first core lamination 121 have overlapping areas in the orthographic projection in the axial direction of the stator core 10, the overlapping areas are the oil hole 61 communication areas of the adjacent core laminations 60, and at least parts of the corresponding two oil holes 61 of the adjacent two core laminations 60 are mutually communicated to form one communication oil passage 40, thereby realizing the arrangement of the communication oil passages 40.

In some embodiments of the present utility model, the distance between the oil guide holes 61 and the center line of the corresponding core laminations 60 is gradually reduced in the direction from the center core lamination stack 11 to the end core lamination stack 12.

As shown in fig. 4, 6 and 7, the outer diameters of the first core lamination 121, the second core lamination 122, the third core lamination 123 and the fourth core lamination 124 are the same, the outer diameter of the fifth core lamination 111 is smaller than the outer diameters of the other core laminations 60, as shown in fig. 3 and 7, the fifth core lamination 111 has no oil guide hole 61, and the oil guide hole 61 of the fourth core lamination 124 may communicate with the annular oil passing groove 30, thereby ensuring that the oil passing groove 30 communicates with the plurality of communication oil passages 40 in the circumferential direction of the stator core 10.

As shown in fig. 4, for the end core lamination stack 12, the distance between the oil holes 61 and the center line of the corresponding core lamination 60 is gradually decreased from the middle core lamination stack 11 to the end core lamination stack 12, for example, the distance between the oil holes 61 of the fourth core lamination 124 and the center line of the fourth core lamination 124 is larger than the distance between the oil holes 61 of the third core lamination 123 and the center line of the third core lamination 123, the distance between the oil holes 61 of the third core lamination 123 and the center line of the third core lamination 123 is larger than the distance between the oil holes 61 of the second core lamination 122 and the center line of the second core lamination 122, and the distance between the oil holes 61 of the second core lamination 122 and the center line of the first core lamination 121 is larger than the distance between the oil holes 61 of the first core lamination 121 and the center line of the first core lamination 121. As shown in fig. 3 and 4, in the direction from the middle core lamination stack 11 to the end core lamination stack 12, the distance between the communication oil passage 40 and the center line of the stator core 10 is gradually reduced, so that when the cooling medium flows in the communication oil passage 40, the cooling medium can flow in an accelerating manner by means of gravitational potential energy, thereby being beneficial to flowing in the communication oil passage 40, improving the flow rate of the cooling medium, and improving the cooling efficiency of the motor 3.

The motor 3 according to the embodiment of the second aspect of the present utility model comprises the stator structure 1 in the above-described embodiment.

According to the motor 3 of the embodiment of the application, the stator structure 1 of the embodiment is adopted, so that the stator structure 1 of the motor 3 can cool the stator core 10 and the end winding 50 during cooling, and can cool the winding coil 70 in the stator slot 20 in a direct contact manner, thereby being beneficial to improving the cooling effect of the motor 3 and having better cooling effect of the motor 3.

Other constructions of the stator structure 1 and the motor 3, such as a rotor structure, and the like and operation thereof according to embodiments of the present utility model are known to those skilled in the art and will not be described in detail herein.

In the description of the present specification, reference to the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Although embodiments of the present utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the spirit and scope of the utility model as defined by the appended claims and their equivalents.

Claims (10)

1. A stator structure (1) of an electric machine (3), characterized by comprising:

The stator core (10), stator core (10) are annular, stator core (10) inner peripheral wall is formed with stator groove (20) that are used for installing winding coil (70), stator groove (20) follow stator core (10) axial extension, stator core (10) outer peripheral wall is formed with oil groove (30), be formed with in stator core (10) intercommunication oil duct (40), intercommunication oil duct (40) intercommunication oil groove (30) with stator groove (20).

2. The stator structure (1) of the electric motor (3) according to claim 1, wherein the communication oil passage (40) has a first sub-oil passage (41) and a second sub-oil passage (42), the first sub-oil passage (41) and the second sub-oil passage (42) being located on both sides of the oil passing groove (30), respectively, in an axial direction of the stator core (10), the first sub-oil passage (41) and the second sub-oil passage (42) both communicating with the oil passing groove (30) and the stator groove (20).

3. The stator structure (1) of an electric machine (3) according to claim 2, characterized in that the end of the first sub-oil channel (41) facing the oil passing channel (30) communicates with the oil passing channel (30), the end of the first sub-oil channel (41) facing away from the oil passing channel (30) communicating with the stator slot (20);

The end part of the second sub oil passage (42) facing the oil passing groove (30) is communicated with the oil passing groove (30), and the end part of the second sub oil passage (42) facing away from the oil passing groove (30) is communicated with the stator groove (20).

4. The stator structure (1) of the electric motor (3) according to claim 1, wherein the plurality of stator slots (20) and the plurality of communication oil passages (40) are arranged in sequence along the circumferential direction of the stator core (10), the plurality of stator slots (20) and the plurality of communication oil passages (40) are communicated in one-to-one correspondence, the oil passing groove (30) is annular, and the oil passing groove (30) extends along the circumferential direction of the stator core (10) and is communicated with the plurality of communication oil passages (40).

5. The stator structure (1) of an electric machine (3) according to any one of claims 1-4, characterized in that the stator core (10) comprises a plurality of core laminations (60), a plurality of said core laminations (60) being arranged in an axial stack of the stator core (10), a plurality of said core laminations (60) forming a middle core lamination stack (11) and two end core lamination stacks (12), said middle core lamination stack (11) being located between two of said end core lamination stacks (12), said middle core lamination stack (11) and two of said end core lamination stacks (12) together defining the oil through slot (30), both of said end core lamination stacks (12) being formed with said communication oil channels (40).

6. The stator structure (1) of an electric machine (3) according to claim 5, characterized in that the outer diameter of the middle core lamination stack (11) is smaller than the outer diameters of the two end core lamination stacks (12) to define the oil passage groove (30).

7. The stator structure (1) of an electric machine (3) according to claim 5, characterized in that at least one of said end core lamination groups (12) comprises a plurality of core laminations (60), each of said core laminations (60) having an oil guiding hole (61), said oil guiding holes (61) of a plurality of said core laminations (60) of said end core lamination group (12) communicating to form part of said communication oil duct (40).

8. A stator structure (1) of an electric machine (3) according to claim 7, characterized in that the orthographic projection portions of the respective two oil guide holes (61) of the adjacent two core laminations (60) coincide in the axial direction of the stator core (10).

9. The stator structure (1) of an electric machine (3) according to claim 8, characterized in that the distance between the oil guide holes (61) and the center line of the respective core laminations (60) gradually decreases from the middle core lamination stack to the end core lamination stack direction.

10. An electric machine (3), characterized by comprising a stator structure (1) of an electric machine (3) according to any one of claims 1-9.