A stator coil tightening device for an automotive motor and its usage method

Abstract

This invention discloses a stator coil tightening device for an automotive motor and its usage method, relating to the field of coil processing technology. It includes: a base, a drive assembly, and a deflecting cylinder assembly. Multiple sets of the deflecting cylinder assembly are rotatably mounted on the base and connected to the drive assembly. Each deflecting cylinder assembly includes a base column, a transmission gear sleeved at the bottom of the base column, and a sleeve or extended sleeve sleeved at the top of the base column. An ejection limiting assembly is located on the top of the base and sleeved on the outside of the multiple sets of deflecting cylinder assemblies. Through the modular design of the deflecting cylinder assembly, the device can adapt to tightening various hairpin coils, improving its versatility and saving equipment costs. Furthermore, replacing the sleeve does not require disassembling the entire deflecting cylinder assembly, saving the work of aligning the transmission gear and drive plate during installation, thus saving time and improving processing efficiency.

Description

Technical Field

[0001] This invention relates to the field of coil processing technology, specifically to a stator coil tightening device for an automotive motor and its usage method. Background Technology

[0002] Hairpin motors, also known as hair clip motors or flat copper wire winding motors, are innovative electric motors that adopt hairpin winding technology. With their unique structural design and superior performance, hairpin motors have demonstrated broad application potential and value in various fields such as new energy vehicles, home appliances, and industrial production.

[0003] In the construction of a hairpin motor, the stator core typically employs a sophisticated hollow design to provide robust support and housing for the internal coil structure. Deep within the stator core, multiple layers of ring-shaped coil units constructed from U-shaped hairpin coils are meticulously arranged. These coils, as the core components of the hairpin motor, are responsible for generating the magnetic field and driving the rotor's rotation. Multiple U-shaped hairpin coils are tightly connected using a specific layout strategy, collectively forming a highly efficient ring-shaped coil unit. This design not only significantly improves the motor's power density and torque density but also effectively reduces its size and weight, achieving a dual leap in performance and compactness.

[0004] The current assembly process for hair clip coils mainly involves a series of tedious steps, including hair clip forming, wire insertion, end separation, twisting, welding, insulation treatment, and electrical testing. In large-scale production scenarios, highly automated and integrated large-scale production lines have become the mainstream choice. However, this production method requires extremely high investment in capital and technology, and the maintenance and upgrading costs of the production line are also considerable, making it unsuitable for small-scale production environments. In contrast, small-scale production environments rely more on manual assembly. While this reduces initial investment, the skill level of workers and the precision of manual operations become key factors restricting production efficiency and product quality. Especially in the wire insertion stage, when the loop coil unit is about to be formed, the mutual compression between coils often makes it difficult to insert the last few hair clip coils smoothly. This not only consumes a lot of physical strength and energy for workers but may also cause coil bending due to improper operation, thus affecting product quality.

[0005] In view of this, Chinese patent (CN110880844B) discloses a stator coil tightening device. This device achieves efficient coil tightening through mechanization, significantly improving the efficiency of manual insertion and effectively avoiding coil deformation or bending during manual tightening. However, in practical applications, we have found that this device still has limitations: its rotating sleeve adopts an integrated design and only has a single type of rectangular insertion hole. This means that different types of rotating sleeves need to be replaced when dealing with hairpin coils of different sizes. The installation process of the rotating sleeve is cumbersome and time-consuming, requiring precise alignment of the tail pinion with the drive mechanism's tooth groove. If the alignment is inaccurate, the rectangular mounting holes at the top of multiple rotating sleeves will deflect, preventing the hairpin coil from being tightened at the same angle after insertion, severely affecting production efficiency.

[0006] Based on this, we are committed to developing a stator coil tightening device for automotive motors, aiming to comprehensively optimize the above-mentioned problems and further improve production efficiency and product quality. Summary of the Invention

[0007] The purpose of this invention is to provide a stator coil tightening device for automotive motors and its usage method. Through the modular design of the deflection cylinder assembly, it solves the problem of low processing efficiency caused by the inability to apply tightening to various hairpin coils and the complexity of installation, disassembly, and alignment.

[0008] The objective of this invention can be achieved through the following technical solutions:

[0009] A stator coil tightening device for an automotive motor is used to tighten a coil tube, wherein the coil tube is formed by combining several hairpin coils, and each hairpin coil includes a base foot one and a base foot two, comprising:

[0010] A base, which is mounted on an operating table;

[0011] A drive assembly is disposed at the bottom of the base;

[0012] A deflecting cylinder assembly, wherein multiple sets of the deflecting cylinder assembly are rotatably mounted on the base and connected to the drive assembly;

[0013] The deflection cylinder assembly includes a base column, a transmission gear is sleeved at the bottom of the base column, and a sleeve or an extended sleeve is sleeved at the top of the base column.

[0014] An ejection limiting component is disposed on the top of the base and sleeved on the outside of multiple sets of deflection cylinder components.

[0015] As a further aspect of the present invention: the base includes a substrate, a plurality of support legs are provided around the bottom of the substrate, a plurality of sets of mounting holes are provided in the center of the substrate, the plurality of sets of mounting holes are arranged in a circle around the center of the substrate, and a set of deflection cylinder components are rotatably installed in each of the mounting holes.

[0016] As a further aspect of the present invention: the driving assembly includes a driving disk, the outer shaft surface of the driving disk is provided with driving teeth, the driving teeth mesh with multiple sets of deflection cylinder assemblies, a connecting post is installed at the center of the driving disk, and the connecting post is connected to an external driving motor.

[0017] As a further aspect of the present invention: the top surface of the drive disk is provided with multiple sets of limiting rods, and each set of limiting rods is equipped with a ball bearing at its top. The limiting rods are adapted to the annular grooves correspondingly opened at the bottom of the substrate through the ball bearings.

[0018] As a further aspect of the present invention: the ejection limiting component includes a limiting ring, and the inner axial surface of the limiting ring is provided with multiple sets of limiting arc grooves, and the multiple sets of limiting arc grooves are adapted to the deflection cylinder component at the corresponding position.

[0019] The limiting ring is also provided with ejector plates on both sides, and the outer end of the ejector plate is connected to the lifting cylinder on the operating table.

[0020] During operation, the ejection limiting assembly is pushed upward by the lifting cylinder, applying a thrust to the bottom foot two of the tightened coil cylinder, making it easier to remove the coil cylinder.

[0021] As a further aspect of the present invention: the deflection cylinder assembly includes a base column, a transmission gear is sleeved at the bottom of the base column, and a sleeve or an extended sleeve is sleeved at the top of the base column.

[0022] The transmission gear meshes with the drive teeth of the drive disk to realize power transmission from the drive disk to the base column.

[0023] The sleeve or extended sleeve is used to receive the base of the hairpin coil.

[0024] As a further embodiment of the present invention: the base column includes a base column body, the bottom of the base column body is provided with a limiting frustum, the bottom center of the limiting frustum is provided with a connecting guide post, the transmission gear is fixedly sleeved on the connecting guide post, and the axial surface of the base column body is provided with four sets of assembly grooves.

[0025] The sleeve has an assembly groove inside and a snap-fit ​​groove at the bottom. Each of the four walls of the snap-fit ​​groove is provided with a snap-fit ​​platform, and the four sets of snap-fit ​​platforms are slidably connected to the four sets of assembly grooves.

[0026] The extended sleeve structure is identical to the sleeve.

[0027] As a further aspect of the present invention: the bottom of the assembly groove of the extended sleeve is provided with a removal guide, and the base column is provided with a vent hole;

[0028] The removal guide and vent hole facilitate the easy ejection of the bottom foot.

[0029] As a further aspect of the present invention, it also includes a guide component and / or an auxiliary positioning disk, wherein the guide component and / or auxiliary positioning disk are disposed on the top of the base to guide and limit the deflection of the coil drum;

[0030] The guiding component includes a guide disk, and a rotating guide groove is formed on the inner ring of the guide disk. The number of guide grooves is the same as the number of deflection cylinder components.

[0031] The auxiliary positioning disk has a rotating auxiliary groove in the inner circle of its center, and the number of the auxiliary grooves is the same as the number of guide grooves in the guide disk.

[0032] The deflection of the hairpin coil is limited by the guide groove and / or auxiliary groove.

[0033] As a further aspect of the present invention: a method for using an automotive motor stator coil tightening device, characterized in that it includes:

[0034] The bottom foot of the hairpin coil is inserted into the corresponding deflection cylinder assembly one by one. The bottom foot two at the other end of the hairpin coil is set through the auxiliary groove and guide slide groove. Then, the drive motor is started, which drives the drive disk to rotate. The drive disk drives multiple sets of transmission gears to rotate synchronously. The transmission gears drive the extended sleeve to rotate. The extended sleeve drives the bottom foot one to deflect. The bottom foot one drives the hairpin coil to deflect. Multiple sets of hairpin coils deflect synchronously, tightening the loose coil cylinder. The tightened coil cylinder is grabbed by an external gripping device, and the lifting cylinder is started, which drives the ejector plate to move up. The ejector plate drives the limit ring to rise, applying a thrust to the bottom foot two of the tightened coil cylinder. At the same time, the external air source is connected to introduce high-speed airflow into the vent, making it easier for the coil cylinder to be removed from the device.

[0035] The beneficial effects of this invention are:

[0036] This invention, through the modular design of the deflection cylinder assembly, enables convenient replacement of sleeves to adapt to hairpin coils with different cross-sectional sizes or shapes. This allows the device in this embodiment to adapt to the tightening of various hairpin coils, improving the versatility of the device and saving equipment costs. Furthermore, replacing the sleeve does not require disassembling the entire deflection cylinder assembly, saving the work of aligning the transmission gears and drive disc during installation, thereby saving time and improving processing efficiency.

[0037] This invention inserts the bottom foot of the hairpin coil into the corresponding deflection cylinder assembly, and then drives the drive assembly to deflect via a drive motor, thereby causing multiple sets of deflection cylinder assemblies to deflect synchronously. This achieves the deflection and tightening of the coil tube formed on the multiple sets of deflection cylinder assemblies. After tightening, the coil tube is taken away by an external gripping mechanism. When being gripped, the coil tube is assisted in being pushed out by an ejection limiting assembly, which improves the ease of gripping. Specifically, two sets of lifting cylinders synchronously lift the corresponding ejection plate, thereby driving the limiting ring to rise and applying a pushing force to the bottom foot of the tightened coil tube, making it easier for the coil tube to be removed from the device. Attached Figure Description

[0038] The invention will now be further described with reference to the accompanying drawings.

[0039] Figure 1 This is a schematic diagram of the loose state of the coil drum after insertion according to Embodiment 1 of the present invention;

[0040] Figure 2 This is a schematic diagram of the coil drum insertion state according to Embodiment 1 of the present invention;

[0041] Figure 3 This is a schematic diagram of the coil drum after insertion and tightening according to Embodiment 1 of the present invention;

[0042] Figure 4 This is a schematic diagram of the overall structure of Embodiment 1 of the present invention;

[0043] Figure 5 This is a schematic diagram of the internal structure after removing the outer shell in Embodiment 1 of the present invention;

[0044] Figure 6 This is a schematic diagram of the combined structure of the base, the ejection limiting component, and the multiple sets of deflection cylinder components of the present invention;

[0045] Figure 7 This is a schematic diagram of the drive component structure of the present invention;

[0046] Figure 8 This is a schematic diagram of the structure of the drive component and multiple sets of deflection cylinder components of the present invention.

[0047] Figure 9 This is a schematic diagram of the limiting rod structure of the present invention;

[0048] Figure 10 This is a schematic diagram of the structure of the guide component and the coil cylinder of the present invention.

[0049] Figure 11 This is a schematic diagram of the ejection limiting component structure of the present invention;

[0050] Figure 12 This is a schematic diagram of the hairpin coil structure in the existing technology;

[0051] Figure 13 This is a schematic diagram of the deflection cylinder assembly and the hairpin coil insertion structure of the present invention;

[0052] Figure 14 This is a schematic diagram of the deflection cylinder assembly structure of the present invention;

[0053] Figure 15 This is a schematic diagram of the base column structure of the present invention;

[0054] Figure 16 This is a schematic diagram of the loose state of the coil drum after insertion in Embodiment 2 of the present invention;

[0055] Figure 17 This is a schematic diagram of the structure of the second embodiment of the present invention with the outer shell removed;

[0056] Figure 18 This is a schematic diagram of the extended sleeve and the limiting base in Embodiment 2 of the present invention. Figure 1 ;

[0057] Figure 19 This is a schematic diagram of the extended sleeve and the limiting base in Embodiment 2 of the present invention. Figure 2 ;

[0058] Figure 20 This is a schematic diagram of the limiting base structure in Embodiment 2 of the present invention.

[0059] In the diagram: 1. Outer shell one; 11. Outer shell two; 2. Base; 21. Base plate; 22. Support leg; 23. Support column; 24. Assembly hole; 25. Mounting hole; 3. Drive assembly; 30. Drive disc; 31. Weight reduction groove; 32. Connecting column; 33. Drive gear; 34. Limiting rod; 4. Ejection limiting assembly; 41. Limiting ring; 42. Ejection plate; 43. Guide hole; 44. Limiting arc groove one; 5. Deflection cylinder assembly; 51. Base column; 511. Base column body; 512. Limiting frustum; 513. Assembly slide; 514. 515. Connecting guide post; 52. Vent hole; 52. Sleeve; 520. Assembly groove; 521. Insertion guide; 522. Removal guide; 523. Snap-fit ​​groove; 53. Transmission gear; 54. Extended sleeve; 6. Guide assembly; 60. Guide disc; 61. Guide slide groove; 62. Mating groove; 7. Auxiliary positioning disc; 71. Auxiliary groove; 72. Connecting post; 8. Connecting shaft; 9. Limiting base; 91. Fixing hole; 92. Limiting arc groove two; 100. Hairpin coil; 101. Base foot one; 102. Base foot two; 200. Coil tube. Detailed Implementation

[0060] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0061] This invention provides a stator coil tightening device for an automotive motor, used to tighten the coil cylinder 200, wherein, as shown... Figure 2 As shown, the coil tube 200 is formed by combining several hairpin coils 100 with rectangular cross-sections, and specifically as follows... Figure 12 As shown, the hairpin coil 100 is U-shaped, including two parallel straight segments, base 101 and base 2 102, which are connected by a curved segment to form a U-shaped hairpin coil 100.

[0062] Example 1

[0063] like Figures 1-15 As shown, this embodiment provides a stator coil tightening device for an automotive motor. The device includes a base 2 connected to an operating table (not shown in the figure), a plurality of deflection cylinder assemblies 5 are rotatably arranged on the base 2, and a drive assembly 3 is arranged at the bottom of the base 2. The tail ends of the plurality of deflection cylinder assemblies 5 are all connected to the drive assembly 3, and the drive assembly 3 is connected to a drive motor (not shown in the figure) installed on the operating table. The synchronous deflection of the plurality of deflection cylinder assemblies 5 is achieved by driving the drive motor.

[0064] Furthermore, such as Figure 5 and Figure 6 As shown, an ejection limiting component 4 is provided on the top of the base 2. This ejection limiting component 4 is sleeved on the outside of the deflection cylinder component 5, and multiple sets of deflection cylinder components 5 are arranged sequentially to form a circular area. The ejection limiting component 4 is sleeved on the outer diameter of the circular area. A guide component 6 is also provided on the top of the base 2. The guide component 6 is located above the ejection limiting component 4 and is also located on the outside of the circular area, playing a guiding role in the tightening of the coil cylinder 200.

[0065] In this embodiment, the bottom foot 101 of the hairpin coil 100 is inserted into the corresponding deflection cylinder assembly 5, and then the drive motor drives the drive assembly 3 to deflect, thereby driving multiple sets of deflection cylinder assemblies 5 to deflect synchronously, thereby deflecting and tightening the coil cylinder 200 formed on the multiple sets of deflection cylinder assemblies 5. After tightening, the coil cylinder 200 is taken away by an external gripping mechanism. When being gripped, the push-out limiting assembly 4 assists in pushing out the coil cylinder 200, improving the ease of gripping.

[0066] It should be noted in this embodiment that, as Figures 1-4 As shown, an outer casing 1 is also provided on the outside of the combined structure consisting of base 2, drive assembly 3, ejection limit assembly 4, deflection cylinder assembly 5, and guide assembly 6. This outer casing protects the internal combined structure and prevents other unpredictable external factors (such as flying debris) from affecting the operation of the entire device. Furthermore, the unified outer casing 1 makes the overall structure more aesthetically pleasing and improves product satisfaction.

[0067] Furthermore, such as Figure 6 and Figure 9 As shown, the base 2 in this embodiment includes a base plate 21. The main body of the base plate 21 is disc-shaped, and multiple sets of protruding connecting parts are distributed around the main body. Each connecting part is connected to a support leg 22 at its bottom. The multiple support legs 22 are connected to corresponding positions on the operating table. The connection method is not specifically limited; it can be welding or bolt fixing. Multiple sets of mounting holes 24 are opened in the middle of the base plate 21. The multiple sets of mounting holes 24 are arranged in a circle around the center of the main body of the base plate 21. A set of deflecting cylinder components 5 are rotatably installed in each mounting hole 24. The base 2 is used as a base for tightening action and supports the various parts set on it.

[0068] Furthermore, such as Figure 7 As shown, in this embodiment, the number of deflection cylinder assemblies 5 is the same as the number of mounting holes 24, and they correspond one-to-one. The deflection cylinder assemblies 5 are rotatably disposed in the corresponding mounting holes 24 and are connected to the drive assembly 3 disposed at the bottom of the substrate 21. Specifically, as shown... Figures 7-9 As shown, the drive assembly 3 in this embodiment includes a drive disk 30. Drive teeth 33 are formed on the outer shaft surface of the drive disk 30. The drive teeth 33 mesh with multiple sets of deflection cylinder assemblies 5. A connecting post 32 is installed at the center of the drive disk 30. This connecting post 32 is connected to the output shaft of the drive motor on the operating table to drive the deflection of the drive disk 30. Multiple sets of limiting rods 34 are provided on the top surface of the drive disk 30. These limiting rods 34 are centrally symmetrically distributed around the center of the drive disk 30, and each of the limiting rods 34 has a ball bearing (not shown in the figure) installed on its top. 34 is adapted to the annular groove (not shown in the figure) corresponding to the bottom of the substrate 21 by the ball bearing, and the distance between the drive disk 30 and the substrate 21 is limited in multiple directions, so that the movement of the drive disk 30 during the deflection process is more stable, and the engagement between the drive disk 30 and the deflection cylinder assembly 5 is more precise and stable, avoiding fluctuations in power transmission (wherein, when the drive disk 30 deflects, due to some assembly gaps and other external reasons, the drive disk 30 may rotate unevenly, and the fluctuations at the edge will be amplified, affecting the stability of the meshing relationship with the deflection cylinder assembly 5).

[0069] It should be noted that in this embodiment, multiple sets of weight-reducing grooves 31 are formed around the circumference of the drive disk 30. These multiple sets of weight-reducing grooves 31 are arranged around the center of the drive disk 30 to reduce the weight of the drive disk 30, save material costs, and reduce the probability of fluctuations by reducing the weight.

[0070] Furthermore, such as Figures 7-8 and Figures 12-15 As shown, the aforementioned deflection cylinder assembly 5 includes a base column 51 rotatably disposed in the mounting hole 24. A transmission gear 53 is sleeved at the bottom of the base column 51. The transmission gear 53 meshes with the drive gear 33 of the drive disk 30 to realize the power transmission from the drive disk 30 to the base column 51. A sleeve 52 is sleeved at the top of the base column 51. The sleeve 52 is used to support the bottom foot 101 of the hairpin coil 100, thereby driving the hairpin coil 100 to deflect. Multiple hairpin coils 100 deflect synchronously to achieve a tightened state.

[0071] Specifically, such as Figure 15 As shown, the aforementioned base column 51 includes a base column body 511. A limiting frustum 512 is provided at the bottom of the base column body 511. The outer diameter of the limiting frustum 512 is slightly larger than that of the base column body 511. The outer diameter of the base column body 511 is adapted to the mounting hole 24 for rotation within the mounting hole 24. The outer diameter of the limiting frustum 512 is larger than that of the mounting hole 24 to limit the insertion of the base column 51 from the bottom surface of the substrate 21. A connecting guide post 514 is also provided at the bottom center of the limiting frustum 512. The aforementioned transmission gear 53 is fixedly sleeved on the connecting guide post 514. Four sets of mounting grooves 513 are symmetrically provided on the axial surface of the base column body 511. These four sets of mounting grooves 513 extend downward and penetrate the limiting frustum 512. The through mounting grooves 513 facilitate the use of wire cutting during the processing of the base column 51, thereby simplifying the processing difficulty.

[0072] Furthermore, specifically as follows Figure 14 As shown, the sleeve 52 in this embodiment is circular, and an assembly groove 520 for the base foot 101 is provided inside the sleeve 52. An insertion guide 521 is provided at the head of the assembly groove 520. The insertion guide 521 is flared with the opening facing outward. Furthermore, a snap-fit ​​groove 523 is provided at the bottom of the sleeve 52. A snap-fit ​​platform is provided on all four walls of the snap-fit ​​groove 523. The four sets of snap-fit ​​platforms are slidably connected to the four sets of assembly slide grooves 513. The sleeve 52 is stably and accurately fitted onto the base column 51 through the snap-fit ​​platforms, thereby realizing the assembly of the deflection cylinder assembly 5.

[0073] The modular design of the deflection cylinder assembly 5 allows for easy replacement of the sleeve 52 to fit the corresponding hairpin coil 100 when dealing with hairpin coils 100 of different sizes or shapes. This enables the device in this embodiment to adapt to the tightening of various hairpin coils 100, improving the versatility of the device and saving equipment costs. Furthermore, replacing the sleeve 52 does not require disassembling the entire deflection cylinder assembly 5, saving the work of aligning the transmission gear 53 and the drive disk 30 during installation, thereby saving time and improving processing efficiency.

[0074] It should be noted in this embodiment that the sleeve 52 is fixed to the base post 51 by an internal hex screw. At the same time, the internal hex screw is only set on one side to prevent incorrect installation. In addition, the uniform installation position ensures that the deflection direction and angle of the assembly groove 520 are consistent when multiple sets of sleeves 52 are installed (the angle is the deflection angle of the line connecting the assembly groove 520 and the circle of the base plate 21 to the circle of the sleeve 52).

[0075] In this embodiment, the deflection cylinder assembly 5 will be described in detail in terms of its operation process, such as... Figure 13 As shown, the bottom foot 101 of the hairpin coil 100 is inserted into the matching mounting slot 520. The insertion guide 521 serves as a guide, making manual insertion smoother. After insertion, the transmission gear 53 receives power from the drive disc 30, causing the base column 51 to deflect. The deflected base column 51 causes the sleeve 52 to deflect. Multiple sets of deflecting cylinder assemblies 5 deflect synchronously, thus causing the coil cylinder 200 to change from an inserted, relaxed state (e.g., ...). Figure 2 Tighten to a firm state (e.g.) Figure 3 );

[0076] Furthermore, when inserting hairpin coils 100 of other sizes, first remove the sleeve 52 on the base post 51 and replace it with a sleeve 52 with an appropriate mounting groove 520. Then, fix it to the base post 51 with an internal hex screw. In the entire replacement process, there is no need to disassemble the already aligned transmission gear 53 and drive disk 30, which further saves alignment time and improves processing efficiency.

[0077] Furthermore, such as Figure 5 and Figure 6As shown, in this embodiment, multiple sets of support columns 23 are symmetrically arranged on the top of the substrate 21. A guide assembly 6 is installed on the top of the support columns 23, and the guide assembly 6 includes a guide disk 60. A rotating guide groove 61 is formed on the inner circle of the guide disk 60. The number of guide grooves 61 is the same as the number of deflection cylinder assemblies 5, and the guide grooves 61 are arranged perpendicular to the deflection cylinder assemblies 5. The guide grooves 61 extend outward from the side close to the deflection cylinder assemblies 5, and the groove width of the guide grooves 61 is adapted to the outer diameter of the sleeve 52. The guide grooves 61 are arc-shaped, and the direction of rotation is opposite to the direction of rotation of the sleeve 52 during operation. That is, when the sleeve 52 rotates clockwise during operation, the rotation direction of the multiple guide grooves 61 is counterclockwise (e.g., ...). Figure 5 (As shown).

[0078] The guide groove 61 in the guide disc 60, which cooperates with the deflection cylinder assembly 5, allows each hairpin coil 100 to slide along the guide groove 61 when the base foot 101 deflects, thereby limiting the deflection of the hairpin coil 100, making the deflection more stable, and separating each base foot 102 to avoid mutual interference, further making the tightening action more consistent.

[0079] Furthermore, to make it easier for the external gripping device to grip the tightened coil drum 200, an ejection limiting component 4 is provided between the base 2 and the guide assembly 6, specifically as follows: Figure 6 and Figure 11 As shown, the aforementioned ejection limiting component 4 includes a limiting ring 41. The inner axial surface of the limiting ring 41 has multiple sets of limiting arc grooves 44. The multiple sets of limiting arc grooves 44 are arranged in a circle around the center of the limiting ring 41, and each set of limiting arc grooves 44 is adapted to the sleeve 52 in the deflection cylinder component 5 at the corresponding position, thereby providing stable support for the rotating deflection cylinder component 5.

[0080] Furthermore, ejector plates 42 are provided on both sides of the limiting ring 41. Guide holes 43 are provided in the middle of the two ejector plates 42. The ejector plates 42 are slidably connected to the corresponding support columns 23 through the guide holes 43. The two ejector plates 42 extend outward and out of the outer cover 1. The bottom is connected to the lifting cylinder (not shown in the figure) on the operating table. The corresponding ejector plates 42 are lifted synchronously by the two sets of lifting cylinders, thereby driving the limiting ring 41 to rise and applying a pushing force to the bottom foot 102 of the tightened coil tube 200, so that the coil tube 200 can be taken out of the device more conveniently.

[0081] The method of using the device in this embodiment is as follows:

[0082] The assembled device is installed on the operating table. The connecting column 32 is connected to the drive motor, and the ejector plate 42 is connected to the corresponding lifting cylinder. Then, the bottom feet 101 of the hairpin coil 100 are manually inserted into the corresponding deflection cylinder assembly 5. The bottom feet 102 at the other end of the hairpin coil 100 are respectively set through the guide grooves 61. The number of guide grooves 61 between the bottom feet 101 and the bottom feet 102 is determined according to the design. Then, the drive motor is started, which drives the drive disk 30 to rotate. The drive disk 30 drives multiple sets of transmission gears 53 to rotate synchronously. The transmission gear 53 drives the sleeve 52 to rotate, the sleeve 52 drives the base 101 to deflect, the base 101 drives the hairpin coil 100 to deflect, and multiple hairpin coils 100 deflect synchronously, so that the loose coil tube 200 is tightened. After tightening, the tightened coil tube 200 is grabbed by an external gripping device, and the lifting cylinder is activated to drive the ejector plate 42 to move upward. The ejector plate 42 drives the limiting ring 41 to rise, and applies a pushing force to the base 102 of the tightened coil tube 200, so that the coil tube 200 can be taken out of the device more conveniently.

[0083] Example 2

[0084] To further improve the stability of the deflection of the hairpin coil 100, this embodiment adds an auxiliary positioning disk 7 structure based on the first embodiment, and uses an extended sleeve 54 to replace the sleeve 52, providing a wider range of interlocking support for the base 101.

[0085] Among them, such as Figure 16 and Figure 17 As shown, in this embodiment, an auxiliary positioning disk 7 is provided on the top of the guide component 6. In the first embodiment, multiple sets of mating grooves 62 are opened on the top axial surface of the guide disk 60, and multiple sets of connecting posts 72 are symmetrically arranged on the bottom surface of the auxiliary positioning disk 7. The number of connecting posts is the same as the number of mating grooves 62, and they correspond one-to-one. The connection between the auxiliary positioning disk 7 and the guide component 6 is realized through the connection between the connecting posts 72 and the mating grooves 62.

[0086] The auxiliary positioning disk 7 has a rotating auxiliary groove 71 in the inner circle of its middle part. The number of auxiliary grooves 71 is the same as the number of guide grooves 61 in the guide disk 60, and their shape and rotation direction are the same. When the auxiliary positioning disk 7 is installed on the top of the guide disk 60, the auxiliary grooves 71 and the guide grooves 61 are in the same position and correspond to each other. The limiting contact area of ​​the bottom foot 102 is increased by the sliding groove structure at both ends (auxiliary groove 71 + guide groove 61), thereby more fully limiting the deflection of the hairpin coil 100 and making the deflection more stable.

[0087] Due to the increased internal structure, this embodiment uses a larger outer casing 2 11 instead of outer casing 1 to protect the internal structure of the overall device.

[0088] It should be noted in this embodiment that multiple sets of auxiliary positioning disks 7 can be set up and stacked on top of each other in sequence to further increase the limiting contact area of ​​the second foot 102 and improve the stability of the second foot 102 when deflected.

[0089] Furthermore, such as Figures 18-20 In order to further increase the deflection driving area of ​​the base 101 (i.e. the contact area between the base 101 and the assembly groove 520), so that the force on the base 101 is more uniform and stable during deflection, and to avoid partial torsional deformation of the base 101, this embodiment uses an extended sleeve 54 instead of the sleeve 52 in the first embodiment. It should be noted that the structure of the extended sleeve 54 in this embodiment is completely the same as that of the sleeve 52, except that the length is increased.

[0090] By extending the sleeve 54, the contact area between the foot 101 and the assembly groove 520 is increased, so that the foot 101 can directly bear a larger range of force when subjected to deflection force, thus avoiding minor torsional deformation.

[0091] Furthermore, since the extended sleeve 54 is used, the degree of deflection of the top end of the extended sleeve 54 is greater during deflection. Therefore, this embodiment also provides a limiting base 9, which, together with the limiting ring 41, provides deflection support at the bottom and top of the extended sleeve 54, thereby making the deflection of the extended sleeve 54 more stable.

[0092] Specifically, such as Figure 20 As shown, in this embodiment, the limiting base 9 includes a ring-shaped body. Multiple sets of limiting arc grooves 92 are formed on the outer axial surface of the body. The multiple sets of limiting arc grooves 92 form a circle around the center of the body, and each set of limiting arc grooves 92 is adapted to a corresponding extended sleeve 54. The extended sleeve 54 can deflect in the limiting arc grooves 92 to achieve support. Furthermore, a mounting hole 25 is provided in the center of the substrate 21 in the first embodiment. A connecting shaft 8 is installed in the mounting hole 25, and a fixing hole 91 is provided in the center of the limiting base 9. The limiting base 9 is connected to the connecting shaft 8 through the fixing hole 91.

[0093] Furthermore, because the use of the extended sleeve 54 increases the contact area between the base 101 and the assembly groove 520, the frictional force of the gripping device after deflection is greater. Therefore, in this embodiment, a removal guide 522 is provided at the bottom of the assembly groove 520 of the extended sleeve 54 (e.g., Figure 14As shown, the removal guide 522 is flared with its opening facing outwards. After the bottom foot 101 is inserted, there is a gap between the bottom part of the removal guide 522 and the bottom part of the removal guide 522. Furthermore, a vent hole 515 is provided on the base column 51. The vent hole 515 connects the assembly groove 520 with the outside. The high-speed airflow is introduced from the outside, which on the one hand pushes the bottom foot 101 out, and on the other hand enters the mating interface between the bottom foot 101 and the assembly groove 520 through the inclined surface of the removal guide 522, thereby reducing the friction force when the outside grabs and pulls.

[0094] Furthermore, by ventilating the deflection cylinder assembly 5 from the outside, each deflection cylinder assembly 5 can be cleaned after the coil cylinder 200 is grasped, preventing external dust or other impurities from affecting the next insertion of the hairpin coil 100, thus indirectly improving work efficiency.

[0095] The method of using the device in this embodiment is as follows:

[0096] The assembled device is installed on the operating table. The connecting column 32 is connected to the drive motor, the ejector plate 42 is connected to the corresponding lifting cylinder, and the vent 515 is connected to the external air source. Then, the bottom foot 101 of the hairpin coil 100 is manually inserted into the corresponding deflection cylinder assembly 5. The bottom foot 102 of the other end of the hairpin coil 100 passes through the auxiliary groove 71 and the guide slide 61 respectively. Then, the drive motor is started, which drives the drive disk 30 to rotate. The drive disk 30 drives multiple sets of transmission gears 53 to rotate synchronously. The transmission gears 53 drive the extended sleeve 54 to rotate. The extended sleeve 54 drives the base foot 101 to deflect, and the base foot 101 drives the hairpin coil 100 to deflect. Multiple hairpin coils 100 deflect synchronously, tightening the loose coil tube 200. The tightened coil tube 200 is grabbed by an external gripping device, and the lifting cylinder is activated, driving the ejector plate 42 to move upward. The ejector plate 42 drives the limiting ring 41 to rise, applying a thrust to the base foot 102 of the tightened coil tube 200. At the same time, the external air source is connected to the vent 515 to introduce high-speed airflow, making it easier for the coil tube 200 to be removed from the device.

[0097] In the description of this invention, it should be understood that the terms "upper," "lower," "left," and "right," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or a specific orientational structure and operation. Therefore, they should not be construed as limitations on the invention. Furthermore, "first" and "second" are only for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "multiple" means two or more.

[0098] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0099] The foregoing has provided a detailed description of one embodiment of the present invention, but this description is merely a preferred embodiment and should not be construed as limiting the scope of the invention. All equivalent variations and modifications made within the scope of the claims of this invention should still fall within the patent coverage of this invention.

Claims

1. A kind of automobile motor stator coil tightening device, the coil cylinder (200) is tightened, the coil cylinder (200) is formed by the mutual combination of several hairpin coils (100), the hairpin coil (100) includes bottom foot one (101) and bottom foot two (102), it is characterized by, The utility model provides a coil cylinder automatic ejection device, including: Base (2), base (2) is installed on the operating platform; Driving assembly (3), driving assembly (3) is set up in the bottom of base (2); Deflection cylinder assembly (5), deflection cylinder assembly (5) sets up multiple groups, multiple groups deflection cylinder assembly (5) rotation sets up in base (2), and is connected with driving assembly (3); Deflection cylinder assembly (5) includes base column (51), and the bottom of base column (51) is sleeved with transmission gear (53), and the top of base column (51) is sleeved with sleeve (52) or lengthened sleeve (54); Ejection limiting assembly (4), ejection limiting assembly (4) sets up in the top of base (2), and ejection limiting assembly (4) is sleeved in the outside of multiple groups deflection cylinder assembly (5); Ejection limiting assembly (4) includes limiting ring (41), and multiple groups limiting arc groove no. (44) are seted up in the inner shaft surface of limiting ring (41), and multiple groups limiting arc groove no. (44) are all adapted with the deflection cylinder assembly (5) of corresponding position;Limiting ring (41) both sides are provided with ejection plate (42), and the outside end of ejection plate (42) is connected with the jacking air cylinder on the operating platform;When working, ejection limiting assembly (4) is pushed up by jacking air cylinder, and the bottom foot no. (102) of the coil cylinder (200) after tightening is applied to the thrust, and the coil cylinder (200) is conveniently taken out; Driving assembly (3) includes driving disc (30), and the outer shaft surface of driving disc (30) is seted up with driving gear (33), and transmission gear (53) is engaged with the driving gear (33) of driving disc (30) and is connected, realizes the power transmission of driving disc (30) to base column (51);Sleeve (52) or lengthened sleeve (54) is used for the bottom foot no. (101) of hairpin coil (100) is supported; Base column (51) includes base column main body (511), and the bottom of base column main body (511) is provided with limiting circular table (512), and the bottom center of limiting circular table (512) is provided with connecting guide column (514), and transmission gear (53) is fixedly sleeved on connecting guide column (514), and the shaft surface of base column main body (511) is seted up with four sets of assembly sliding slot (513);Sleeve (52) is seted up with assembly groove (520) inside, and sleeve (52) bottom end is seted up with clamping groove (523), and the four walls of clamping groove (523) are all provided with card station, and four sets card station are slidably connected with four sets assembly sliding slot (513); The structure of lengthened sleeve (54) is identical with sleeve (52).

2. The device according to claim 1, wherein Base (2) includes base plate (21), and multiple support legs (22) are seted up around the bottom of base plate (21), and multiple sets assembly circular hole (24) are seted up in the middle of base plate (21), and multiple sets assembly circular hole (24) are arranged in a circle around the center of base plate (21), and one set deflection cylinder assembly (5) is rotatably installed in each assembly circular hole (24).

3. The device according to claim 1, wherein the device is characterized by: The driving gear (33) is engaged with multiple sets of deflection cylinder assemblies (5), a connecting column (32) is arranged at the center of the driving disc (30), and the connecting column (32) is connected with an external driving motor.

4. The device according to claim 2, wherein the device is characterized by: A plurality of limiting rods (34) are arranged on the top surface of the driving disc (30), and a plurality of balls are arranged on the top of the plurality of limiting rods (34), and the limiting rods (34) are matched with the annular grooves arranged on the bottom of the base plate (21) through the balls.

5. The device according to claim 1, wherein the device is characterized by: The bottom of the assembly groove (520) of the lengthened sleeve (54) is provided with a moving-out guide (522), and the base column (51) is provided with a ventilation hole (515); Through the cooperation of the moving-out guide (522) and the ventilation hole (515), the bottom foot one (101) is conveniently ejected.

6. The device according to claim 1, wherein the device is characterized by: The guiding assembly (6) and / or the auxiliary positioning disc (7) are arranged on the top of the base (2) to guide and limit the deflection of the coil cylinder (200); The guiding assembly (6) comprises a guiding disc (60), a rotating guiding sliding groove (61) is arranged in the inner ring of the guiding disc (60), and the number of the guiding sliding grooves (61) is consistent with the number of the deflection cylinder assemblies (5); An auxiliary groove (71) is arranged in the inner ring of the auxiliary positioning disc (7), and the number of the auxiliary grooves (71) is consistent with the number of the guiding sliding grooves (61) in the guiding disc (60). The deflection of the hairpin coil (100) is limited through the guiding sliding groove (61) and / or the auxiliary groove (71).

7. A method of using the automotive motor stator coil tightening device according to claim 6, characterized in that, The bottom foot one (101) of the hairpin coil (100) is manually inserted into the corresponding deflection cylinder assembly (5) in sequence, the bottom foot two (102) at the other end of the hairpin coil (100) is arranged to pass through the auxiliary groove (71) and the guiding sliding groove (61), then the driving motor is started to drive the driving disc (30) to rotate, the driving disc (30) drives multiple sets of transmission gears (53) to synchronously rotate, the transmission gears (53) drive the lengthened sleeve (54) to rotate, the lengthened sleeve (54) drives the bottom foot one (101) to deflect, the bottom foot one (101) drives the hairpin coil (100) to deflect, multiple sets of hairpin coils (100) are synchronously deflected, the loose coil cylinder (200) is tightened, the tightened coil cylinder (200) is grabbed by an external grabbing device, the jacking cylinder is started to drive the ejection plate (42) to move upwards, the ejection plate (42) drives the limiting ring (41) to move upwards, a pushing force is applied to the bottom foot two (102) of the tightened coil cylinder (200), at the same time, the external air source is connected to pass high-speed airflow into the ventilation hole (515), so that the coil cylinder (200) can be more conveniently taken out of the device. ​

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