New energy automobile stator intermediate frequency coil thermoforming equipment

Abstract

The invention discloses new energy automobile stator intermediate frequency coil thermoforming equipment which comprises a bottom frame and a positioning table, an external heating coil is vertically and slidably connected to the bottom frame, the inner diameter of the external heating coil is larger than the outer diameter of a stator, a vertical groove is formed in the positioning table, and an internal heating coil is vertically and slidably connected into the vertical groove. The outer diameter of the external heating coil is smaller than the inner diameter of the stator, and a transmission assembly for transmitting the external heating coil and the inner heating coil to vertically and reversely move is arranged between the external heating coil and the inner heating coil. The heating forming effect of the stator is better, meanwhile, the heating uniformity is better, the situation that the temperature drop difference between the two ends of the stator is large is not prone to occurring in the heating coil returning process, the heating forming effect of the stator is better facilitated, and follow-up assembling and using are facilitated.

Description

Technical Field

[0001] The present invention relates to the field of stator heating and forming, and in particular to an intermediate frequency coil heating and forming device for a stator of a new energy vehicle. Background Art

[0002] With the continuous development of society, new energy vehicles are becoming more and more popular. The motor is a core component of a new energy vehicle, and the stator is an important part of the motor. During the production process of the stator, a heating link is required. Currently, for stator heating, an intermediate frequency coil heating method is usually used for forming. When installing the stator into components such as the motor housing, the stator is heated by an intermediate frequency coil to make it expand, facilitating high-precision fitting and assembly with other components. After cooling, the stator can be tightly combined with other components, improving the assembly quality and stability of the motor; before insulating treatment such as dipping the stator with paint, preheating is carried out through intermediate frequency coil heating to remove moisture and impurities on the surface of the stator, improving the adhesion effect and filling rate of the insulating paint, enhancing the insulation performance of the stator. The intermediate frequency coil heating method has the advantages of high heating efficiency and accurate temperature control.

[0003] Intermediate frequency coil heating usually involves sleeving a heating coil around the outer periphery of the stator for heating. In actual use, the temperature change in the outer ring area of the stator will be higher than that in the inner ring area, and thus it is prone to uneven heating, ultimately affecting the stator quality and assembly effect, which needs to be further improved. Summary of the Invention

[0004] In order to further improve the heating uniformity, the present application provides an intermediate frequency coil heating and forming device for a stator of a new energy vehicle.

[0005] The present application provides an intermediate frequency coil heating and forming device for a stator of a new energy vehicle, adopting the following technical solution: An intermediate frequency coil heating and forming device for a stator of a new energy vehicle includes a chassis and a positioning table. An outer heating coil is vertically slidably connected to the chassis. The inner diameter of the outer heating coil is larger than the outer diameter of the stator. The positioning table is provided with a vertical groove, and an inner heating coil is vertically slidably connected in the vertical groove. The outer diameter of the inner heating coil is smaller than the inner diameter of the stator. A transmission assembly for driving the two to move vertically in opposite directions is provided between the outer heating coil and the inner heating coil.

[0006] Optionally, a column is slidably connected in the vertical groove. The inner heating coil is fixed to the bottom of the column. The outer wall of the column is provided with evenly distributed air blowing ports, and the air blowing ports are connected to a high-pressure air source.

[0007] Optionally, a heat insulation seat is fixed to the top of the inner heating coil. The bottom of the column is rotatably connected to the heat insulation seat, and the orientation of the air blowing ports is inclined to the radial direction of the column.

[0008] Optionally, an air suction port is further provided on the column. The air suction ports and the air blowing ports are distributed in a staggered manner. The air suction port is connected to an air suction fan, and the orientation of the air suction port is along the radial direction of the column.

[0009] Optionally, the outer diameter of the heat insulation seat is equal to the inner diameter of the stator, and an annular receiving groove is formed on the top wall of the heat insulation seat.

[0010] Optionally, the transmission assembly includes a gear and a rack. The racks are symmetrically arranged on both sides of the gear and meshed with it. The gear is rotatably connected to the chassis. One of the racks is fixed to the outer heating coil, and the other rack is fixed to the inner heating coil. A lifting cylinder for driving the outer heating coil to move vertically up and down is provided on the chassis.

[0011] Optionally, a bottom ring is fixed to the bottom of the outer heating coil. A ring groove corresponding to and adapted to the bottom ring is provided on the positioning table. A travel switch is arranged in the ring groove, and the travel switch is used to stop the lifting cylinder from driving the outer heating coil to descend.

[0012] Optionally, a diaphragm is arranged at the air suction port. A cross-shaped cutting groove is formed on the diaphragm to form circumferentially distributed diaphragm pieces.

[0013] In summary, the present application includes at least one of the following beneficial technical effects: 1. By adopting the method of simultaneously heating the outer heating coil and the inner heating coil, heat can be synchronously transferred from both the outside and the inside of the stator at the same time, resulting in a better heating and forming effect for the stator and better heating uniformity. 2. The outer heating coil and the inner heating coil move vertically in opposite directions through the transmission assembly, with good synchronism. After heating, the outer heating coil moves up and returns to its position, driving the inner heating coil to move down. During the retraction period, the outer heating coil at the lower part of the stator gradually disengages, but at this time, the inner heating coil still does not disengage, so that the lower part of the stator remains in the heating state, and the same applies to the upper part of the stator. That is, during the process of the heating coil returning to its position, it is not easy to have a large difference in temperature drop at both ends of the stator, which is more conducive to the heating and forming effect of the stator and facilitates subsequent assembly and use. 3. During the process of the inner heating coil moving up into the stator, the column first passes through the inside of the stator. By blowing air from the air blowing port, the inner surface of the stator can be cleaned in advance, causing the impurities and dust adhering to the inner surface of the stator to fall off. During the air blowing from the air blowing port, the column will rotate synchronously under the reaction force of the wind, making the cleaning area more comprehensive and avoiding the residue of impurity particles from affecting the subsequent assembly of the stator, thereby improving the final heating and shaping quality and the subsequent assembly accuracy. 4. After the inner heating coil moves up to its position, the column is located at the top of the stator. At this time, the air suction port on the column is opened, and the smoke generated during heating can be sucked away by the air suction port, avoiding a large amount of thick smoke from affecting the surrounding environment and also serving the purpose of protecting the health of the staff. Brief Description of the Drawings

[0014] Figure 1 is the overall structure diagram of an embodiment of the present application.

[0015] Figure 2 is the side view of the column in an embodiment of the present application.

[0016] Figure 3 is the partial sectional view of the column in an embodiment of the present application.

[0017] Figure 4 is the front view of the air suction port in an embodiment of the present application.

[0018] Description of Reference Numerals: 1, chassis; 2, positioning table; 3, base; 4, vertical seat; 5, stator; 6, external heating coil; 7, connecting plate; 8, vertical groove; 9, internal heating coil; 10, gear; 11, rack; 12, installation cavity; 13, vertical rod; 14, bottom plate; 15, driving motor; 16, heat insulation seat; 17, column; 18, air blowing port; 19, air suction port; 20, receiving groove; 21, bottom ring; 22, ring groove; 23, travel switch; 24, avoidance through groove; 25, diaphragm; 26, cutting groove; 27, diaphragm. Detailed Description of the Embodiment

[0019] The following further describes the present application in detail with reference to the attached Figures 1-4 drawings.

[0020] A medium-frequency coil heating and forming device for the stator of a new energy vehicle, as Figure 1 shown, includes a chassis 1 and a positioning table 2. The chassis 1 includes an integrated base 3 and a vertical seat 4. The positioning table 2 is used for placing the stator 5 to be heated. An external heating coil 6 is arranged above the positioning table 2. A connecting plate 7 is fixed to the top of the external heating coil 6. The connecting plate 7 is vertically slidably connected to the vertical seat 4. The inner diameter of the external heating coil 6 is larger than the outer diameter of the stator 5. A driving source for driving the vertical lifting of the external heating coil 6 is arranged on the chassis 1; in addition, a vertical groove 8 is vertically opened on the positioning table 2 and the base 3. An internal heating coil 9 is vertically lifted and arranged in the vertical groove 8. The outer diameter of the internal heating coil 9 is smaller than the inner diameter of the stator 5, and a transmission component for driving the vertical reverse movement of the two is arranged between the internal heating coil 9 and the external heating coil 6.

[0021] In this way, by adopting the method of heating the external heating coil 6 and the internal heating coil 9 simultaneously, heat can be transferred synchronously from both the outside and the inside of the stator 5. This results in a better heating and forming effect for the stator 5, with better heating uniformity. The external heating coil 6 and the internal heating coil 9 achieve vertical reverse movement through the transmission component, having good synchronism. After heating, the external heating coil 6 moves upward and returns to its position, driving the internal heating coil 9 to move downward. During the retraction period, the external heating coil 6 at the lower part of the stator 5 gradually disengages, but at this time, the internal heating coil 9 still does not disengage, causing the lower part of the stator 5 to remain in the heating state. The same applies to the upper part of the stator 5. That is, during the process of the heating coil returning to its position, it is not easy for the temperature difference at both ends of the stator 5 to decrease significantly, which is more conducive to the heating and forming effect of the stator 5 and facilitates subsequent assembly and use.

[0022] As Figure 1 shown, the transmission component includes a gear 10 and a rack 11. An installation cavity 12 is provided inside the base 3. The gear 10 and the rack 11 are both installed in the installation cavity 12. The gear 10 is rotatably connected to the base 3. There are two racks 11, which are distributed and meshed on both sides of the gear 10. A vertical rod 13 is vertically fixed on the connecting plate 7, and a bottom plate 14 is fixed to the bottom of the internal heating coil 9. One of the racks 11 is fixed to the vertical rod 13, and the other rack 11 is fixed to the bottom plate 14. The drive source includes a drive motor 15, which drives the gear 10 to rotate. In this way, by driving the gear 10 to rotate, the synchronous vertical reverse lifting of the external heating coil 6 and the internal heating coil 9 can be driven. The structure is simple and easy to implement.

[0023] As Figure 1 shown, a heat insulation seat 16 is fixedly arranged on the top of the internal heating coil 9. Above the heat insulation seat 16, there is a column 17, which is located inside the stator 5. The inner diameter of the heat insulation seat 16 is the same as the inner diameter of the stator 5. In this way, during the placement of the stator 5, horizontal positioning can be achieved by means of the heat insulation seat 16. During the actual heating process, the heat insulation seat 16 can also play a heat insulation role, reducing the large amount of heat transferred to the column 17, realizing the multi-purpose of the heat insulation seat 16. The heat insulation seat 16 can be made of a foamed ceramic plate.

[0024] As Figure 1 and Figure 2As shown in the figure, evenly distributed air blowing openings 18 and air suction openings 19 are provided on the side wall of the upright column 17. Among them, the air blowing openings 18 are connected to a high-pressure air source through pipelines. The high-pressure air source can adopt an air compressor. The air suction openings 19 are connected to an air suction fan through pipelines. The diameter of the air blowing openings 18 is smaller than that of the air suction openings 19. In this way, when the inner heating coil 9 moves upward into the stator 5 during use, the upright column 17 first passes through the inside of the stator 5. By means of the air blown out from the air blowing openings 18, the inner surface of the stator 5 can be cleaned in advance, so that the impurities and dust remaining and adhering to the inner surface of the stator 5 fall off. Before heating, the condition of the inner surface of the stator 5 is realized, and the influence of residual particle impurities on the subsequent heating and forming effect and assembly accuracy is avoided.

[0025] As Figures 1-3 shown in the figure, in this embodiment, the upright column 17 is rotatably connected to the heat insulation seat 16, and the opening direction of the air blowing opening 18 is inclined to the radial direction of the upright column 17. In this way, during the air blowing process, the upright column 17 can be continuously driven to rotate circumferentially by means of the reaction force, so that the air blowing opening 18 can clean each area of the inner surface of the stator 5, improving the comprehensiveness of cleaning; in addition, an annular receiving groove 20 is opened on the top wall of the heat insulation seat 16, and the receiving groove 20 can receive the dropped particle impurities, which is convenient for subsequent unified collection and treatment.

[0026] As Figures 1-3 shown in the figure, the air suction openings 19 and the air blowing openings 18 are staggeredly distributed on the outer surface of the upright column 17. The opening direction of the air suction openings 19 is arranged along the radial direction of the upright column 17. After the inner heating coil 9 moves upward in place, the upright column 17 is located at the top of the stator 5. At this time, the air suction openings 19 on the upright column 17 are opened, and the smoke generated during heating can be sucked away by the air suction openings 19, avoiding a large amount of thick smoke from affecting the surrounding environment, and at the same time achieving the purpose of protecting the health of the staff; in the actual use process, when the upright column 17 is located inside the stator 5, the air suction openings 19 and the air blowing openings 18 can also be opened to form a turbulent flow by the interaction of air currents, which can achieve a better cleaning purpose, and some small dust impurities can be directly sucked away by the air suction openings 19, saving the subsequent operation of cleaning impurities and realizing multiple uses of the upright column 17.

[0027] As Figure 1 shown in the figure, a bottom ring 21 is fixed at the bottom of the outer heating coil 6. The positioning table 2 has a ring groove 22 corresponding to and adapted to the bottom ring 21. A travel switch 23 is arranged in the ring groove 22. The travel switch 23 is used to stop the driving motor 15, that is, after the outer heating coil 6 descends until the bottom ring 21 presses against the travel switch 23, the driving motor 15 stops working, thereby avoiding the situation that the outer heating coil 6 moves downward excessively. In addition, an avoidance through groove 24 corresponding to the upright column 17 is opened on the connecting plate 7 at the top of the outer heating coil 6. The upright column 17 can pass through the avoidance through groove 24 of the connecting plate 7 during the rising process, avoiding the phenomenon of interference.

[0028] As Figure 4 shown, a diaphragm 25 is provided at the opening of the air suction port 19. A cross-shaped cut groove 26 is formed on the diaphragm 25 to form a diaphragm piece 27 that can be turned inward. When the air suction port 19 is not sucking air, the diaphragm piece 27 can naturally close the air suction port 19 to prevent foreign impurities from entering. After the air suction port 19 is opened to generate suction, the diaphragm piece 27 is turned inward to open, and the air suction port 19 can suck air, thus realizing the automatic opening and closing of the air suction port 19 well. The structure is simple and practical.

[0029] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereby. Therefore, all equivalent changes made according to the structure, shape, and principle of the present application should be covered within the protection scope of the present application.

Claims

1. A new energy vehicle stator medium frequency coil heating and forming equipment, characterized by: The invention comprises a base frame (1) and a positioning platform (2), wherein an external heating coil (6) is vertically slidably connected to the base frame (1), wherein the inner diameter of the external heating coil (6) is larger than the outer diameter of the stator (5), wherein the positioning platform (2) is provided with a vertical groove (8), wherein an internal heating coil (9) is vertically slidably connected to the vertical groove (8), wherein the outer diameter of the internal heating coil (9) is smaller than the inner diameter of the stator (5), and a transmission component is provided between the external heating coil (6) and the internal heating coil (9) for transmitting the two to move vertically in opposite directions.

2. The heating and forming equipment for medium-frequency coils of stators of new energy vehicles according to claim 1 is characterized in that: A column (17) is slidably connected in the vertical groove (8), the internal heating coil (9) is fixed at the bottom of the column (17), and the outer wall of the column (17) is provided with evenly distributed blowing ports (18), and the blowing ports (18) are connected to a high-pressure air source.

3. The heating and forming equipment for medium-frequency coils of stators of new energy vehicles according to claim 2 is characterized in that: A heat-insulating seat (16) is fixed to the top of the internal heating coil (9), the bottom of the column (17) is rotatably connected to the heat-insulating seat (16), and the direction of the blowing port (18) is inclined to the radial direction of the column (17).

4. The heating and forming equipment for medium-frequency coils of stators of new energy vehicles according to claim 3 is characterized in that: The column (17) is also provided with an air suction port (19), the air suction port (19) and the air blowing port (18) are staggered, the air suction port (19) is connected to a suction fan, and the air suction port (19) is oriented along the radial direction of the column (17).

5. The heating and forming equipment for medium-frequency coils of stators of new energy vehicles according to claim 3 is characterized in that: The outer diameter of the heat insulation seat (16) is equal to the inner diameter of the stator (5), and the top wall of the heat insulation seat (16) is provided with an annular receiving groove (20).

6. The heating and forming equipment for medium-frequency coils of stators of new energy vehicles according to claim 1 is characterized in that: The transmission assembly comprises a gear (10) and a rack (11), wherein the rack (11) is symmetrically arranged on both sides of the gear (10) and meshed therewith, and the gear (10) is rotatably connected to the base frame (1), wherein one side of the rack (11) is fixed to the outer heating coil (6), and the other side of the rack (11) is fixed to the inner heating coil (9), and a driving motor (15) for driving the gear (10) to rotate is arranged on the base frame (1).

7. The heating and forming equipment for medium-frequency coils of stators of new energy vehicles according to claim 6 is characterized in that: A bottom ring (21) is fixed to the bottom of the external heating coil (6); a ring groove (22) corresponding to and matching the bottom ring (21) is provided on the positioning platform (2); a travel switch (23) is provided in the ring groove (22); and the travel switch (23) is used to stop the driving motor (15) to drive the external heating coil (6) to descend.

8. The heating and forming equipment for medium-frequency coils of stators of new energy vehicles according to claim 4 is characterized in that: A diaphragm (25) is provided at the air suction port (19), and a cross-shaped groove (26) is opened on the diaphragm (25) to form a circumferentially distributed membrane (27).

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