Stator structure and motor
By setting an oil inlet boss and an oil inlet channel inside the motor housing, and setting multiple oil channels inside the stator core, efficient cooling of the stator core and end windings is achieved, solving the problem of poor cooling effect of existing motors and reducing manufacturing costs.
Patent Information
- Application Number
- CN202520273565.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-20
- Publication Date
- 2026-01-13
- Estimated Expiration
- 2035-02-20
AI Technical Summary
Existing motor cooling mainly relies on spray pipes or spray ring assemblies, resulting in poor cooling effect inside the stator core and increasing the manufacturing cost of the motor.
An oil inlet boss and an oil inlet channel are provided inside the housing, and multiple first oil channels and inclined second oil channels are provided inside the stator core. Cooling oil flows through the oil inlet channel and the first oil channel through the stator core, and finally sprays the end windings through the second oil channel.
It improves the cooling efficiency of the stator core and end windings, reduces the manufacturing cost of the motor, and avoids the need for additional spray pipes or spray ring assemblies.
Smart Images
Figure CN223797985U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to a stator technical field, especially a kind of stator structure and motor. BACKGROUND
[0002] In the field of new energy vehicles, the motor is a core component, and its performance directly affects the overall performance of the vehicle. With the rapid development of the new energy vehicle industry, the power density of the motor is continuously increasing, and the temperature rise problem is becoming more and more significant, which makes the cooling structure in the motor more important.
[0003] The cooling of the existing motor mainly relies on a spray pipe or a spray ring assembly. Specifically, a spray pipe is added to the housing, or a spray ring assembly is added to the end of the stator core. In actual use, the oil enters the corresponding spray pipe or spray ring assembly through the oil channel on the housing or stator core, and is sprayed onto the stator core or end winding through the spray pipe or spray ring assembly, thereby achieving cooling of the motor.
[0004] However, the spray pipe or spray ring assembly described above mainly achieves heat dissipation by spraying oil onto the surface of the stator core and the end winding, which has poor cooling effect on the entire interior of the stator core. Moreover, the spray pipe or spray ring assembly requires a special oil circuit system and oil pump when in use, which greatly increases the overall manufacturing cost of the motor. SUMMARY
[0005] Therefore, the utility model aims to provide a stator structure and motor, which solves the technical problems of the prior art that the cooling of the motor mainly relies on a spray pipe or a spray ring assembly, which has poor cooling effect on the interior of the stator core, and the spray pipe or spray ring assembly requires a special oil circuit system and oil pump when in use, which greatly increases the overall manufacturing cost of the motor.
[0006] One aspect of the utility model is to provide a stator structure, which comprises a housing, at least one oil inlet boss arranged inside the housing, and a stator assembly detachably connected to the housing by a plurality of bolts. The oil inlet boss is located on one side of the stator assembly in the radial direction. An oil inlet channel is arranged in the oil inlet boss. One end of the oil inlet channel is in communication with the outside of the bottom of the housing.
[0007] The stator assembly comprises a stator core and two end windings respectively arranged at two axial ends of the stator core, one side of the stator core in the circumferential direction is in close contact with the side of the oil inlet boss away from the bottom of the shell, a plurality of first oil channels and a plurality of second oil channels are arranged on the stator core, the first oil channels are arranged in the axial direction of the stator core, the two ends of each first oil channel are respectively communicated with one second oil channel, the middle part of one first oil channel is communicated with the other end of the oil inlet channel, the second oil channels are arranged obliquely, and the outlet end of the second oil channel is arranged towards the circumferential outer wall of the end winding.
[0008] Compared with the prior art, the beneficial effects of the stator structure and the motor of the utility model lie in that at least one oil inlet boss is arranged in the shell, the oil inlet boss makes full use of the space inside the shell, the oil inlet channel is arranged in the oil inlet boss, a plurality of first oil channels and a plurality of second oil channels are arranged in the stator core, the second oil channels are arranged obliquely, so that the cooling oil can flow through the inside of the entire stator core through the oil inlet channel and the plurality of first oil channels, and finally spray the end winding through the plurality of second oil channels, thereby realizing effective cooling of the inside of the entire stator core and the end winding, improving the cooling efficiency, and no longer needing to additionally arrange a spraying pipe or a spraying ring assembly, greatly reducing the manufacturing cost of the motor.
[0009] In addition, the stator structure according to the utility model can also have the following additional technical features.
[0010] Further, the included angle between the axial direction of the second oil channel and the axial direction of the stator core is 30-45 degrees.
[0011] Further, the shell comprises a shell part and a plurality of mounting parts arranged in the shell part, the plurality of mounting parts are uniformly and spacedly arranged along the circumferential direction of the shell part, the mounting parts are provided with mounting through holes, and the mounting through holes are matched with the bolts.
[0012] Further, the stator core comprises a first core, two second cores respectively laminated on the two axial sides of the first core, and a third core laminated on the side of the second core away from the first core, the end winding is arranged on the side of the third core away from the second core, a plurality of connecting through holes are respectively arranged on the circumferential direction of the first core, the second core and the third core, and the connecting through holes are matched with the bolts.
[0013] Further, a plurality of first through holes are arranged on the first core, the plurality of first through holes are arranged in a circular array with the center of the first core as the center, and the first through holes are arranged in the axial direction of the first core.
[0014] Further, the first iron core is further provided with at least one oil inlet hole, the oil inlet hole is arranged along the radial direction of the first iron core, the oil inlet hole is communicated with the first oil channel, when one side of the stator iron core in the circumferential direction is in close contact with the side of the oil inlet boss away from the bottom of the shell, the oil inlet channel is communicated with the first oil channel through the oil inlet hole.
[0015] Further, the second iron core is provided with a plurality of second through holes, the second through holes are arranged in a circular array around the center of the first iron core, and the second through holes are arranged along the axial direction of the second iron core.
[0016] Further, when the two second iron cores are respectively stacked on the two sides of the first iron core in the axial direction, each second through hole is respectively stacked on the two adjacent first through holes, and the two ends of the second through hole in the circumferential direction of the second iron core are respectively communicated with the corresponding first through hole to form the first oil channel for the oil to pass through.
[0017] Further, the third iron core is provided with a plurality of second oil channels, the second oil channels are arranged in a circular array around the center of the third iron core, and the inlet end of the second oil channel is communicated with the middle part of the end of the second through hole away from the first iron core.
[0018] Another aspect of the utility model provides a motor, including stator structure and with the stator structure adaptation's rotor structure, the stator structure includes above-mentioned stator structure. BRIEF DESCRIPTION OF DRAWINGS
[0019] Figure 1 It is the three-dimensional structure diagram of the stator structure of the utility model;
[0020] Figure 2 It is the structure schematic view of the shell in the stator structure of the utility model;
[0021] Figure 3 It is the explosion schematic view of the stator structure of the utility model;
[0022] Figure 4 It is the structure schematic view of the stator structure of the utility model under certain visual angle;
[0023] Figure 5 It is Figure 4 The cross-sectional schematic view of A-A in;
[0024] Figure 6 It is Figure 5 The structure enlarged view of B in;
[0025] Figure 7 It is the structure schematic view of the stator structure of the utility model when the second iron core is stacked in the first iron core;
[0026] Figure 8 For Figure 7 Structure enlarged view at C in the middle;
[0027] Figure 9 For the communication relationship between the oil inlet hole, the first oil channel and the second oil channel inside the stator structure of the utility model is shown schematically;
[0028] Figure 10 For the cross-sectional view of the second oil channel inside the stator structure of the utility model is shown schematically.
[0029] Among them, the above-mentioned drawings include the following signs: 10 - shell; 11 - shell part; 12 - mounting part; 101 - mounting through hole; 20 - oil inlet boss; 201 - oil inlet channel; 30 - bolt; 40 - stator assembly; 41 - stator core; 411 - first core; 412 - second core; 413 - third core; 401 - connecting through hole; 402 - oil inlet hole; 403 - first through hole; 404 - second through hole; 405 - second oil channel.
[0030] The following specific embodiments will further illustrate the utility model in conjunction with the above-mentioned drawings. Specific embodiments
[0031] In order to facilitate understanding of the utility model, the utility model will be described more fully below with reference to the relevant drawings. The drawings show several embodiments of the utility model. However, the utility model can be realized in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the utility model more thorough and comprehensive.
[0032] It should be noted that when an element is referred to as "fixed to" another element, it can be directly on another element or there can be a middle element. When an element is considered to be "connected" to another element, it can be directly connected to another element or there can be a middle element. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.
[0033] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the utility model belongs. The terms used in the specification of the utility model herein are only for the purpose of describing specific embodiments and are not intended to limit the utility model. The term "and / or" used herein includes any and all combinations of one or more related listed items.
[0034] Please refer to Figures 1 to 9The utility model discloses a kind of stator structures, stator structure includes shell 10, at least one oil inlet boss 20 in the inside of shell 10, and the stator assembly 40 of being detachably connected with shell 10 by multiple bolts 30, oil inlet boss 20 is located in the radial side of stator assembly 40, oil inlet boss 20 is used to oil to stator assembly 40, specifically, in the embodiment, one oil inlet boss 20 is equipped in the inside of shell 10, oil inlet passage 201 is equipped in oil inlet boss 20, one end of oil inlet passage 201 is communicated with the outside of the bottom of shell 10.
[0035] As example explanation, shell 10 includes shell portion 11 and multiple mounting portions 12 in the shell portion 11, multiple mounting portions 12 are evenly spaced along the circumference of shell portion 11, in the embodiment, four mounting portions 12 are provided on the bottom inner wall of shell portion 11 with the center of shell portion 11 as the center of symmetry, one mounting through hole 101 is respectively provided on each mounting portion 12, the mounting through hole 101 is arranged along the axial direction of shell portion 11, and the mounting through hole 101 is matched with bolt 30 to realize the connection between stator assembly 40 and shell 10. Further, oil inlet boss 20 is provided on the bottom inner wall of shell portion 11, oil inlet boss 20 is arranged adjacent to the circumferential side wall of shell portion 11, and the bottom end of oil inlet passage 201 is communicated with the bottom outer wall of shell portion 11.
[0036] As example explanation, stator assembly 40 includes stator core 41 and two end windings 42 respectively arranged on the axial two ends of stator core 41, one side of stator core 41 is close to the side of oil inlet boss 20 away from the bottom of shell 10, multiple first oil channels and multiple second oil channels 405 are provided on stator core 41, the first oil channel is arranged along the axial direction of stator core 41, the two ends of each first oil channel are respectively communicated with a second oil channel 405, the middle part of one of the first oil channels is communicated with the other end of oil inlet passage 201, the second oil channel 405 is arranged obliquely, and the outlet end of second oil channel 405 is arranged towards the circumferential outer wall of end winding 42.
[0037] In the embodiment, the stator core 41 comprises a first core 411, two second cores 412 respectively stacked on the axial two sides of the first core 411, and a third core 413 stacked on the side of the second core 412 away from the first core 411, and the end winding 42 is arranged on the side of the third core 413 away from the second core 412, a plurality of connecting through holes 401 are arranged on the circumferential direction of the first core 411, the second core 412 and the third core 413 respectively, the connecting through holes 401 are matched with the bolts 30, as a specific example, four connecting through holes 401 are uniformly and separately arranged on the circumferential direction of the first core 411, the second core 412 and the third core 413 in the embodiment, in the actual assembly process, the two third cores 413, the two second cores 412 and the first core 411 are sequentially stacked on the mounting portion 12 inside the shell 10, and the connecting through holes 401 are matched with the mounting through holes 101, then the bolts 30 are sequentially threaded through the connecting through holes 401 on each core and the corresponding mounting through holes 101 to be screwed, so as to realize the detachable connection between the stator assembly 40 and the shell 10, that is, the stator structure in the utility model is designed in the form of bolt mounting, which effectively ensures the mounting strength of the overall structure.
[0038] Further, the first core 411 is provided with a plurality of first through holes 403, the plurality of first through holes 403 are arranged in a circular array around the center of the first core 411, and the first through holes 403 are arranged along the axial direction of the first core 411. The first core 411 is also provided with at least one oil inlet hole 402, the oil inlet hole 402 is arranged along the radial direction of the first core 411, and the oil inlet hole 402 is communicated with one first through hole 403. In the embodiment, the first core 411 is provided with one oil inlet hole 402, the oil inlet hole 402 is located in the middle region of the radial side of the first core 411 and is communicated with the middle part of one first through hole 403. When one side of the stator core 41 in the circumferential direction is in close contact with the side of the oil inlet boss 20 away from the bottom of the shell 10, the oil inlet channel 201 is communicated with the first oil channel through the oil inlet hole 402, thereby realizing the purpose of oil inlet of the oil inlet boss 20 to the inside of the stator core 41. It should be noted that the stator structure of the utility model is not limited to the design of only one oil inlet boss 20 in the embodiment. In some embodiments, a plurality of oil inlet bosses 20 can be arranged, and the plurality of oil inlet bosses 20 are arranged in a circular array with the center of the stator assembly 40 as the center. In addition, a plurality of oil inlet channels 201 can also be arranged on a single oil inlet boss 20, and the plurality of oil inlet channels 201 are uniformly and separately arranged along the circumferential direction of the stator assembly 40, so as to increase the oil inlet amount of the inside of the stator assembly 40 and improve the cooling efficiency of the entire stator assembly 40.
[0039] Further, the second core 412 is provided with a plurality of second through holes 404, which are arranged in a circular array around the center of the first core 411, and the second through holes 404 are arranged along the axial direction of the second core 412. When the two second cores 412 are respectively stacked on the two sides of the axial direction of the first core 411, each second through hole 404 is respectively stacked on the two adjacent first through holes 403 on the first core 411, and the two ends of the second through hole 404 are respectively communicated with the corresponding first through hole 403 to form a first oil channel for the oil to pass through. It can also be understood that the ports of the end of the second through hole 404 abutting against the first core 411 are respectively communicated with the two first through holes 403 to form two first oil channels, so that the axial parallel oil circuit is finally formed in the stator core 41. As a specific example, in the embodiment, the first through hole 403 and the second through hole 404 are both waist-shaped hole structures arranged along the circumferential direction of the stator core 41, and the hole diameters of the first through hole 403 and the second through hole 404 are consistent.
[0040] Further, the third core 413 is provided with a plurality of second oil channels 405, which are arranged in a circular array around the center of the third core 413, the inlet end of the second oil channel 405 is communicated with the middle part of the end away from the first core 411 of the second through hole 404, and the outlet end of the second oil channel 405 is arranged towards the circumferential outer wall of the end winding 42. In this way, the cooling oil entering the inside of the stator core 41 through the oil inlet channel 201 in the oil inlet boss 20 can finally spray the circumferential outer wall of the end winding 42 through the second oil channel 405 arranged obliquely, so as to realize the rapid cooling of the end winding 42. In the embodiment, the second oil channel 405 is an obliquely arranged circular hole channel. The angle between the axial direction of the second oil channel 405 and the axial direction of the stator core 41 is 30°-45°. As a specific example, in the embodiment, the angle between the axial direction of the second oil channel 405 and the axial direction of the stator core 41 is 30°.
[0041] In actual use, the use principle of the stator structure of the utility model can be: Figure 6 、 Figure 9 and Figure 10As shown, when the oil inlet boss 20 is tightly attached to the stator core 41, the cooling oil enters the inside of the oil inlet boss 20 through the oil inlet channel 201, and then reaches the oil inlet hole 402 of the first core 411, and then enters the inside of the first core 411. Specifically, since the first through hole 403 on the first core 411 and the second through hole 404 on the second core 412 on both sides are misaligned and overlapped to form a plurality of first oil channels, the cooling oil will flow to and fill all the first oil channels in the inside of the stator core 41 under the action of pressure. In other words, the cooling oil will fill the axial parallel oil paths formed in the inside of the stator core 41. Such a design greatly increases the flow area of the cooling oil in the inside of the stator core 41, thereby improving the heat dissipation performance of the entire stator structure. Then, the cooling oil will finally be sprayed obliquely to the circumferential side surface of the corresponding end winding 42 through the plurality of second oil channels 405 on the stator core 41, so as to realize rapid cooling of the end winding 42.
[0042] In another aspect, the utility model provides a kind of motor, including stator structure and the rotor structure matched with stator structure, and stator structure includes the stator structure described above.
[0043] In summary, the beneficial effects of the stator structure and motor of the utility model are as follows: by setting at least one oil inlet boss in the housing, the oil inlet boss makes full use of the space inside the housing, the oil inlet boss is provided with an oil inlet channel, and a plurality of first oil channels and a plurality of second oil channels are arranged inside the stator core, and the second oil channels are arranged obliquely, so that the cooling oil can flow through the inside of the entire stator core through the oil inlet channel and the plurality of first oil channels, and finally spray the end winding through the plurality of second oil channels, thereby realizing effective cooling of the entire stator core and the end winding, improving the cooling efficiency, and no longer needing to additionally set a spray pipe or a spray ring assembly, greatly reducing the manufacturing cost of the motor.
[0044] In the description of the present specification, the description of the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.
[0045] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of this utility model application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model application should be determined by the appended claims.
Claims
1. A stator structure, characterized by, The application relates to a stator assembly of a motor, which comprises a shell, at least one oil inlet boss arranged in the shell, and a stator assembly which is detachably connected to the shell through a plurality of bolts, wherein the oil inlet boss is located on one side of the stator assembly in the radial direction, an oil inlet channel is arranged in the oil inlet boss, and one end of the oil inlet channel is in communication with the outside of the bottom of the shell. The stator assembly comprises a stator core and two end windings arranged at the axial ends of the stator core respectively, one side of the stator core in the circumferential direction is tightly attached to the side of the oil inlet boss away from the end of the bottom of the shell, a plurality of first oil channels and a plurality of second oil channels are arranged on the stator core, the first oil channels are arranged in the axial direction of the stator core, the two ends of each first oil channel are in communication with one second oil channel respectively, the middle part of one first oil channel is in communication with the other end of the oil inlet channel, the second oil channels are arranged obliquely, and the outlet end of the second oil channel is arranged towards the circumferential outer wall of the end winding.
2. The stator structure of claim 1, wherein The included angle between the axial direction of the second oil channel and the axial direction of the stator core is 30-45 degrees.
3. The stator structure of claim 1, wherein The shell comprises a shell part and a plurality of mounting parts arranged in the shell part, the plurality of mounting parts are uniformly and spacedly arranged in the circumferential direction of the shell part, mounting through holes are arranged on the mounting parts, and the mounting through holes are matched with the bolts.
4. The stator structure of claim 1, wherein The stator core comprises a first core, two second cores which are laminated on the two sides of the first core in the axial direction respectively, and a third core which is laminated on the side of the second core away from the first core, the end winding is arranged on the side of the third core away from the second core, a plurality of connecting through holes are arranged on the first core, the second core and the third core in the circumferential direction respectively, and the connecting through holes are matched with the bolts.
5. The stator structure of claim 4, wherein A plurality of first through holes are arranged on the first core, the first through holes are arranged in a circular array around the center of the first core, and the first through holes are arranged in the axial direction of the first core.
6. The stator structure of claim 5, wherein At least one oil inlet hole is further arranged on the first core, the oil inlet hole is arranged in the radial direction of the first core, the oil inlet hole is in communication with the first oil channel, and when one side of the stator core in the circumferential direction is tightly attached to the side of the oil inlet boss away from the end of the bottom of the shell, the oil inlet channel is in communication with the first oil channel through the oil inlet hole.
7. The stator structure of claim 5, wherein A plurality of second through holes are arranged on the second core, the second through holes are arranged in a circular array around the center of the first core, and the second through holes are arranged in the axial direction of the second core.
8. The stator structure of claim 7, wherein When the two second cores are laminated on the two sides of the first core in the axial direction respectively, each second through hole is laminated on two adjacent first through holes respectively, and the two ends of the second through hole in the circumferential direction of the second core are in communication with corresponding first through holes respectively to form the first oil channel for oil.
9. The stator structure of claim 7, wherein A plurality of second oil channels are arranged on the third core, the second oil channels are arranged in a circular array around the center of the third core, and the inlet end of the second oil channel is in communication with the middle part of the second through hole away from the first core.
10. An electric machine comprising a stator structure and a rotor structure adapted with the stator structure, characterized in that, The stator structure comprises the stator structure of any one of claims 1 to 9. The stator structure comprises the stator structure of any one of claims 1 to 9.