New energy automobile driving motor rotor air cooling structure
By designing an air-cooled structure on the rotor of a drive motor for new energy vehicles, the rotation of the shaft drives airflow to achieve efficient heat dissipation of the rotor and iron core, solving the problem of poor rotor heat dissipation and improving the heat dissipation efficiency and stability of the motor.
Patent Information
- Application Number
- CN202423220205.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-26
- Publication Date
- 2025-11-28
- Estimated Expiration
- 2034-12-26
AI Technical Summary
The rotor cooling effect of existing new energy vehicle drive motors is poor, especially the rotor and iron core are difficult to dissipate heat effectively, resulting in excessively high magnet temperatures and affecting motor performance.
A wind-cooled structure for the rotor of a drive motor for new energy vehicles is designed. By setting detachable end caps and air diversion parts at both ends of the iron core, the rotation of the shaft drives the airflow to achieve direct air cooling of the shaft and iron core. Combined with an annular buffer pad and shock-absorbing unit, wear and vibration are prevented.
It improves the heat dissipation efficiency of the rotor and iron core, avoids wear and vibration, and ensures the stability of motor performance.
Smart Images
Figure CN223613120U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to the technical field of automobile motor, specifically relates to a new energy automobile drive motor rotor air -cooling structure. BACKGROUND
[0002] New energy automobile refers to the vehicle that uses the vehicle-mounted power supply as power, uses motor to drive wheel to travel and meets the requirements of road traffic and safety regulations. Because its influence on the environment is relatively small compared with traditional cars, its prospects are widely optimistic, and the power supply provides electric energy for the driving motor of the electric car. The motor of the electric car converts the electric energy of the power supply into mechanical energy, which drives the wheels and working devices through a transmission device or directly.
[0003] New energy automobile motors are gradually tending to high power density and high speed, and motor temperature rise problems are gradually highlighted. The magnetic steel inside the motor is very sensitive to working temperature. When the temperature of the magnetic steel is too high, the magnetic performance of the magnetic steel will decrease sharply, resulting in a decrease in motor performance, and even permanent demagnetization of the magnetic steel. The magnetic steel of the vehicle permanent magnet synchronous motor is mostly located inside the rotor. The internal structure of the motor is compact, and the rotor is in a high-speed rotating state during operation, which brings great difficulty to the cooling of the rotor. At present, the fan blades are mainly installed at the end of the shaft. When the shaft rotates, the fan blades drive the air flow to cool the inside of the motor. However, this cooling method cannot effectively cool the inside of the rotor and the iron core, so that the cooling effect is poor. UTILITY MODEL CONTENTS
[0004] The technical problem to be solved by the utility model is to overcome the shortcomings of the prior art and provide a new energy automobile drive motor rotor air-cooling structure.
[0005] The technical scheme adopted to solve the above technical problems is:
[0006] A new energy automobile drive motor rotor air-cooling structure, comprising an iron core and a shaft of a drive motor, the iron core end face is provided with a plurality of coil grooves, and further comprising:
[0007] A first end cover and a second end cover detachably connected to the axial both ends of the iron core, a plurality of heat dissipation grooves are formed in the end face of the iron core, the heat dissipation grooves penetrate the axial both end faces of the iron core, the first end cover end face is provided with a first through hole for the free passage of the shaft, and the second end cover end face is provided with a second through hole for the free passage of the shaft;
[0008] A plurality of drainage portions are fixed to the side end face of the first end cover opposite to the iron core, a communication cavity is formed in the first end cover, a plurality of communication openings are formed in the other side end face of the first end cover, the communication openings are in communication with the heat dissipation grooves, an air inlet is formed in the end face of the first end cover and penetrates the communication cavity, and an annular groove is formed in the end face of the second end cover facing the iron core and is in communication with the plurality of heat dissipation grooves.
[0009] Through the above technical solution, when the rotating shaft rotates, the first end cover is driven to rotate, and when the first end cover rotates, the drainage portion can guide air into the inner cavity of the drainage portion and then into the communication cavity through the air inlet, and then into the heat dissipation groove through the communication opening. The air circulates in the heat dissipation groove to the annular groove of the second end cover, so that the air can flow in the plurality of heat dissipation grooves, achieving heat dissipation of the rotating shaft and the iron core. Compared with the prior art, the air can directly cool and dissipate heat in the iron core, so the heat dissipation efficiency is higher.
[0010] Further, the iron core is provided with a screw mounting portion on each end face, and the first end cover and the second end cover are each provided with a screw mounting hole corresponding to the screw mounting portion.
[0011] Through the above technical solution, the screw passes through the screw mounting hole, and then the first end cover and the second end cover are detachably connected to the end of the iron core, so that the first end cover and the second end cover are convenient to assemble and disassemble.
[0012] Further, the plurality of heat dissipation grooves are arranged in the axial direction of the iron core.
[0013] Through the above technical solution, the air in the heat dissipation groove can uniformly dissipate heat for the rotating shaft and the iron core.
[0014] Further, one side of the drainage portion is open, and the side surface of the drainage portion opposite to the first end cover is raised towards the axial outside direction of the first end cover.
[0015] Through the above technical solution, the inner cavity of the drainage portion has a large volume, so that more air enters the inner cavity of the drainage portion as the rotating shaft rotates.
[0016] Further, an arc-shaped notch is formed in the outer wall of the open side of the drainage portion.
[0017] Through the above technical solution, the arc-shaped notch is arranged, so that a small amount of air in the drainage portion can escape from the arc-shaped notch when the rotating shaft rotates at high speed, avoiding excessive air in the inner cavity of the drainage portion to increase the rotating resistance of the rotating shaft.
[0018] Further, the coil groove is located outside the side projection area of the first end cover and the second end cover.
[0019] Through the technical scheme, the edges of the first end cover and the second end cover cannot extrude and abrade the surface of the copper wire winding in the coil slot.
[0020] Further, the first end cover is provided with an annular mounting groove on one side end face of the iron core, and an annular buffer pad is mounted in the mounting groove.
[0021] Through the technical scheme, the first end cover and the iron core end face are buffered and protected by the annular buffer pad, so that extrusion and abrasion of the iron core end face by the first end cover end face are avoided.
[0022] Further, the first end cover end face is provided with a shockproof unit.
[0023] Through the technical scheme, when the first end cover and the iron core are connected loosely, the iron core rotates, and the first end cover vibrates, the shockproof unit can buffer the first end cover.
[0024] Further, the shockproof unit comprises a blind hole formed in the first end cover end face, the blind hole is communicated with the screw mounting hole, and an elastic member is mounted in the blind hole.
[0025] Through the technical scheme, the first end cover is elastically abutted by the elastic member, so that when the connection between the first end cover and the iron core end face is loose, the elastic member can abut against the first end cover to avoid large vibration of the first end cover.
[0026] Further, the elastic member is a spring, and the spring is elastically abutted against the iron core end face and the inner wall of the blind hole at two ends of the spring elastic force direction.
[0027] Through the technical scheme, the spring has large amplitude of expansion and contraction, so that when the connection between the first end cover and the iron core end face is loose, the spring has large elastic abutting force on the first end cover.
[0028] The beneficial effects of the utility model are as follows:
[0029] In the utility model, when the rotating shaft rotates, the first end cover is driven to rotate, when the first end cover rotates, the air can be introduced into the inner cavity of the drainage part through the drainage part, and then the air can enter the communication cavity through the air inlet, and then the air can enter the heat dissipation groove through the communication port, and then the air can flow in the heat dissipation groove to the annular groove of the second end cover, so that the air can flow in the heat dissipation groove, and the heat dissipation of the rotating shaft and the iron core is realized.
[0030] The annular buffer pad buffers and protects between the first end cover and the core end face, thereby avoiding extrusion and abrasion of the first end cover end face to a larger area of the core end face.
[0031] The shockproof unit can buffer the first end cover when the first end cover is loose in connection with the core, the core rotates, and the first end cover vibrates. BRIEF DESCRIPTION OF DRAWINGS
[0032] Figure 1 is a whole structure schematic view of a new energy automobile driving motor rotor air cooling structure in the utility model;
[0033] Figure 2 is Figure 1 an explosion decomposition schematic view of the structure in the utility model;
[0034] Figure 3 is Figure 1 a structure schematic view of another perspective in the utility model;
[0035] Figure 4 is a structure schematic view of the first end cover and the annular buffer pad after assembly in the utility model;
[0036] Figure 5 is Figure 4 an explosion decomposition schematic view of the structure in the utility model;
[0037] Figure 6 is a structure schematic view of the first end cover in the utility model;
[0038] Figure 7 is Figure 6 a first perspective structure schematic view of the utility model;
[0039] Figure 8 is Figure 6 a second perspective sectional structure schematic view of the utility model;
[0040] Figure 9 is a structure schematic view of the second end cover in the utility model.
[0041] Reference signs: 1, core; 2, coil slot; 3, first end cover; 4, rotating shaft; 5, drainage part; 6, screw mounting hole; 7, heat dissipation groove; 8, spring; 9, through groove; 10, annular buffer pad; 11, screw mounting part; 12, second end cover; 13, annular groove; 14, second perforation; 15, air inlet; 16, first perforation; 17, communication port; 18, mounting groove; 19, arc-shaped notch; 20, communication cavity. DETAILED DESCRIPTION
[0042] In order to make the purpose, technical scheme and advantages of the utility model more clearly, the following will be further described in detail in combination with the drawings and examples. It should be understood that the specific examples described herein are only used to explain the utility model, and are not used to limit the utility model.
[0043] As shown in Figures 1-9 The embodiment provides a new energy automobile driving motor rotor air cooling structure, including the iron core 1 and the rotating shaft 4 of driving motor, the iron core 1 end face is equipped with multiple coil slots 2, coil slot 2 is used for winding copper wire winding, the axial both ends of iron core 1 are equipped with multiple screw mounting parts 11, in addition, the both ends of rotating shaft 4 are respectively sleeved with first end cover 3 and second end cover 12, the end face of first end cover 3 is equipped with first perforation 16 for rotating shaft 4 to pass through freely, the end face of second end cover 12 is equipped with second perforation 14 for rotating shaft 4 to pass through freely, the end face of first end cover 3 and second end cover 12 is respectively equipped with the screw mounting hole 6 corresponding with screw mounting part 11, uses screw to pass through screw mounting hole 6, and is connected in screw mounting part 11 by screwing, in turn makes first end cover 3 and second end cover 12 can be assembled in the both ends of iron core 1, in addition, coil slot 2 is located in the side projection area outside of first end cover 3 and second end cover 12;
[0044] The end face of iron core 1 is equipped with multiple heat dissipation grooves 7, heat dissipation groove 7 penetrates the axial both ends of iron core 1, and multiple heat dissipation grooves 7 are arrayed along the axial direction of iron core 1, the side end face of first end cover 3 opposite to iron core 1 is fixedly connected with multiple drainage parts 5, first end cover 3 is equipped with communicating cavity 20 inside, the other side end face of first end cover 3 is equipped with multiple communicating ports 17, communicating port 17 is communicated with heat dissipation groove 7, the end face of first end cover 3 is equipped with air inlet 15 with communicating cavity 20, the end face of second end cover 12 towards iron core 1 is equipped with annular groove 13, annular groove 13 is communicated with multiple heat dissipation grooves 7, the side of drainage part 5 is open, and the side surface of drainage part 5 opposite to first end cover 3 is raised towards the axial direction outside of first end cover 3, the open side outer wall of drainage part 5 is equipped with arc-shaped notch 19;
[0045] The side end face of first end cover 3 towards iron core 1 is equipped with annular mounting groove 18, annular buffer pad 10 is installed in mounting groove 18, annular buffer pad 10 end face is equipped with through slot 9 corresponding with communicating port 17, the end face of first end cover 3 is equipped with multiple blind holes, blind hole is communicated with screw mounting hole 6, spring 8 is installed in blind hole, and the both ends of spring 8 in elastic force direction are respectively elastically abutted against the end face of iron core 1 and the inner wall of blind hole, when first end cover 3 is assembled to the end face of iron core 1, spring 8 is compressed to a certain degree, so that spring 8 has pre-pressure to first end cover 3.
[0046] The working principle of the embodiment is as follows:
[0047] When rotating shaft 4 rotates, first end cover 3 will rotate (referenceFigure 1 , the rotation direction of the rotating shaft 4 is counterclockwise), so that the air can enter the inner cavity of the flow guide 5, and the air enters the air inlet 15, then enters the communication cavity 20, and then enters the heat dissipation grooves 7 on the end surface of the iron core 1 through the communication port 17 and the through groove 9, and then the air enters the annular groove 13 of the second end cover 12. Since the annular groove 13 is in common communication with the plurality of heat dissipation grooves 7, the air can flow in the plurality of heat dissipation grooves 7, so that the air can dissipate heat inside the iron core 1;
[0048] When the screw is loose, the elastic potential energy of the spring 8 is released, so that the first end cover 3 is tightly pressed by the spring 8, and then when the first end cover 3 rotates synchronously with the rotating shaft 4, the vibration of the first end cover 3 can be buffered by the spring 8, avoiding generating larger vibration and noise.
[0049] Although the present specification is described in terms of embodiments, not every embodiment contains only one independent technical solution, and the description of the specification is only for the sake of clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can be appropriately combined to form other embodiments that those skilled in the art can understand. Therefore, the above description is only the preferred embodiment of the present application, and is not intended to limit the scope of the present application; that is, any equivalent transformation made within the scope of the claims of the present application is within the protection scope of the claims of the present application.
Claims
1. A new energy automobile driving motor rotor air cooling structure, comprising a driving motor core (1) and a rotating shaft (4), a plurality of coil grooves (2) are arranged on the end face of the core (1), characterized in that, Also include: The first end cover (3) and the second end cover (12) are detachably connected to the axial both ends of the iron core (1), the end face of the iron core (1) is provided with a plurality of heat dissipation grooves (7), the heat dissipation grooves (7) penetrate the axial both end faces of the iron core (1), the first end cover (3) is provided with a first through hole (16) on the end face, the second end cover (12) is provided with a second through hole (14) on the end face, the second through hole (14) is used for the free passing of the rotating shaft (4). A plurality of drainage parts (5) are fixed to the side end face of the first end cover (3) away from the iron core (1), the inside of the first end cover (3) is provided with a communication cavity (20), the other side end face of the first end cover (3) is provided with a plurality of communication openings (17), the communication openings (17) are in communication with the heat dissipation grooves (7), the end face of the first end cover (3) is provided with an air inlet (15) penetrating the communication cavity (20), the end face of the second end cover (12) facing the iron core (1) is provided with an annular groove (13), the annular groove (13) is in communication with a plurality of heat dissipation grooves (7).
2. The new energy vehicle drive motor rotor air cooling structure according to claim 1, characterized in that, The axial both end faces of the iron core (1) are respectively provided with screw mounting parts (11), the end faces of the first end cover (3) and the second end cover (12) are respectively provided with screw mounting holes (6) corresponding to the screw mounting parts (11).
3. The new energy vehicle drive motor rotor air cooling structure according to claim 1, characterized in that, A plurality of heat dissipation grooves (7) are arranged in the axial direction of the iron core (1).
4. The new energy vehicle drive motor rotor air cooling structure according to claim 1, characterized in that, The drainage part (5) is open on one side, and the side surface of the drainage part (5) away from the first end cover (3) is raised towards the axial outside of the first end cover (3).
5. The new energy vehicle drive motor rotor air cooling structure according to claim 4, characterized in that, The open side outer wall of the drainage part (5) is provided with an arc-shaped notch (19).
6. The new energy vehicle drive motor rotor air cooling structure according to claim 1, characterized in that, The coil groove (2) is located outside the side projection area of the first end cover (3) and the second end cover (12).
7. The new energy vehicle drive motor rotor air cooling structure according to claim 1, characterized in that, The side end face of the first end cover (3) facing the iron core (1) is provided with an annular mounting groove (18), the annular mounting groove (18) is provided with an annular buffer pad (10), and the end face of the annular buffer pad (10) is provided with a through groove (9) penetrating the communication opening (17).
8. The new energy vehicle drive motor rotor air cooling structure according to claim 2, characterized in that, The first end cover (3) is provided with a shockproof unit on the end face. 9.The new energy vehicle drive motor rotor air cooling structure of claim 8, wherein, The shockproof unit comprises a blind hole provided on the end face of the first end cover (3), the blind hole penetrates the screw mounting hole (6), and an elastic member is mounted in the blind hole.
10. The new energy vehicle drive motor rotor air cooling structure according to claim 9, characterized in that, The elastic member is a spring (8), and the two ends of the spring (8) in the elastic force direction are respectively elastically abutted against the end face of the iron core (1) and the inner wall of the blind hole.