Automobile motor stator coil tightening device and use method thereof

Abstract

The invention discloses an automobile motor stator coil tightening device and a use method thereof, and relates to the technical field of coil processing, the automobile motor stator coil tightening device comprises a base, a driving assembly and multiple groups of deflection cylinder assemblies, and the multiple groups of deflection cylinder assemblies are rotatably arranged on the base and are connected with the driving assembly; the deflection cylinder assembly comprises a base column, the bottom of the base column is sleeved with a transmission gear, and the top of the base column is sleeved with a sleeve or a lengthened sleeve. The ejection limiting assembly is arranged at the top of the base, and the multiple sets of deflection cylinder assemblies are sleeved with the ejection limiting assembly; through the modular design of the deflection cylinder assembly, the device can adapt to tightening of various hairpin coils, the universality of the device is improved, then the equipment cost is saved, the whole deflection cylinder assembly does not need to be disassembled when the sleeve is replaced, the work of position correction of a transmission gear and a driving disc during installation is saved, then time is saved, and the machining efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of coil processing, and particularly relates to an automobile motor stator coil tightening device and a using method thereof. Background Art

[0002] A hairpin motor, also known as a hairpin-wound motor or a flat copper wire-wound motor, is a motor that innovatively adopts hairpin winding technology. With its unique structural design and excellent performance, the hairpin motor has shown extensive application potential and value in multiple fields such as new energy vehicles, household appliances, and industrial production.

[0003] In the structure of a hairpin motor, the stator core usually adopts a delicate hollow design to provide a stable support and accommodation space for the internal coil structure. Deep inside the stator core, multiple layers of annular coil units composed of U-shaped hairpin coils are carefully arranged. These coils, as the core components of the hairpin motor, are responsible for generating a magnetic field and driving the rotor to rotate. Multiple U-shaped hairpin coils are closely connected with a specific layout strategy to jointly form an efficient annular coil unit. This design not only significantly improves the power density and torque density of the motor but also effectively reduces the volume and weight of the motor, achieving a double leap in performance and compactness.

[0004] Regarding the assembly process of hairpin coils, it currently mainly includes a series of cumbersome steps such as hairpin forming, wire insertion, end separation, twisting, welding, insulation treatment, and electrical testing. In large-scale production scenarios, large-scale production lines with high automation and integration have become the mainstream choice. However, this production method requires extremely high investment in capital and technology, and the maintenance and update costs of the production line are also quite high. Therefore, it is not suitable for small-scale production environments. In contrast, small-scale production environments rely more on manual assembly. Although this reduces the initial investment, the skill level of workers and the accuracy of manual operations have become key factors restricting production efficiency and product quality. Especially in the wire insertion link, when the annular coil unit is about to be formed, the mutual extrusion between the coils often makes it difficult for the last few hairpin coils to be inserted smoothly. This not only consumes a large amount of physical strength and energy of workers but may also cause the coils to bend due to improper operation, thereby affecting product quality.

[0005] In view of this, Chinese Patent (CN110880844B) discloses a stator coil tightening device. This device realizes the efficient tightening of the coil cylinder through a mechanized method, significantly improving the efficiency of manual wire insertion and effectively avoiding the problems of coil deformation or bending during the manual tightening process. However, in practical applications, we found that this device still has limitations: its rotating sleeve adopts an integrated design and only has rectangular jacks of a single model. This means that when dealing with hairpin coils of different sizes, different models of rotating sleeves need to be replaced. And the installation process of the rotating sleeve is cumbersome and time-consuming, and it is necessary to ensure the precise alignment of the tail pinion with the tooth groove of the driving mechanism. Once the alignment is inaccurate, the rectangular mounting holes at the top of multiple groups of rotating sleeves will deflect, which will cause the hairpin coil to not be able to complete the overall tightening at the same angle after insertion, seriously affecting the production efficiency.

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

[0007] The purpose of the present invention is to provide a tightening device for automotive motor stator coils and its usage method. Through the modular design of the deflection cylinder assembly, it solves the problems of complex tightening, installation, disassembly, and alignment for multiple hairpin coils, resulting in low processing efficiency.

[0008] The purpose of the present invention can be achieved through the following technical solutions:

[0009] A tightening device for automotive motor stator coils tightens the coil cylinder, and the coil cylinder is formed by combining several hairpin coils. The hairpin coil includes a first base foot and a second base foot, and the device includes:

[0010] A base, and the base is installed on the operating table;

[0011] A driving component, and the driving component is arranged at the bottom of the base;

[0012] A deflection cylinder assembly, and multiple groups of the deflection cylinder assemblies are rotatably arranged on the base and connected to the driving component;

[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 ejecting and limiting component, and the ejecting and limiting component is arranged at the top of the base and sleeved outside multiple groups of deflection cylinder assemblies.

[0015] As a further solution of the present invention: The base includes a base plate, and a plurality of support legs are arranged around the bottom of the base plate. A plurality of groups of assembly round holes are formed in the middle of the base plate, and the plurality of groups of assembly round holes are arranged in a circular shape around the center of the base plate. A group of the deflection cylinder assemblies are rotatably installed in each of the assembly round holes.

[0016] As a further solution of the present invention: The driving assembly includes a driving disk, and driving teeth are formed on the outer shaft surface of the driving disk. The driving teeth are engaged with a plurality of groups of deflection cylinder assemblies. A connecting column is installed at the center of the driving disk, and the connecting column is connected to an external driving motor.

[0017] As a further solution of the present invention: A plurality of groups of limiting rods are arranged on the top surface of the driving disk, and balls are installed at the tops of the plurality of groups of limiting rods. The limiting rods are adapted to the annular grooves correspondingly formed at the bottom of the base plate through the balls.

[0018] As a further solution of the present invention: The ejecting and limiting assembly includes a limiting ring, and a plurality of groups of limiting arc grooves I are formed on the inner shaft surface of the limiting ring. The plurality of groups of limiting arc grooves I are all adapted to the deflection cylinder assemblies at corresponding positions;

[0019] Ejecting plates are further arranged on both sides of the limiting ring, and the outer ends of the ejecting plates are connected to the lifting cylinders on the operating table;

[0020] During operation, the ejecting and limiting assembly is pushed up by the lifting cylinder to apply a thrust to the second bottom feet of the tightened coil cylinder, facilitating the removal of the coil cylinder.

[0021] As a further solution 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 is meshed and connected with the driving teeth of the driving disk to realize the power transmission from the driving disk to the base column;

[0023] The sleeve or the extended sleeve is used for receiving the first bottom feet of the hairpin coil.

[0024] As a further solution of the present invention: The base column includes a base column body, a limiting frustum is arranged at the bottom of the base column body, a connecting guide post is arranged at the center of the bottom of the limiting frustum, the transmission gear is fixedly sleeved on the connecting guide post, and four groups of assembly chutes are formed on the shaft surface of the base column body;

[0025] An assembly groove is formed inside the sleeve, a clamping groove is formed at the bottom end of the sleeve, clamping platforms are arranged on the four walls of the clamping groove, and the four groups of clamping platforms are slidably connected to the four groups of assembly chutes correspondingly;

[0026] The structure of the extended sleeve is the same as that of the sleeve.

[0027] As a further solution of the present invention: a removal guide is provided at the bottom of the assembly groove of the elongated sleeve, and a vent hole is provided on the base column;

[0028] The cooperation between the removal guide and the vent hole facilitates the ejection of the bottom foot.

[0029] As a further solution of the present invention: it also includes a guide assembly and / or an auxiliary positioning plate, wherein the guide assembly and / or the auxiliary positioning plate are arranged on the top of the base to guide and limit the deflection of the coil cylinder;

[0030] The guide assembly comprises a guide disc, the inner ring of which is provided with a circle of rotating guide slots, and the number of the guide slots is consistent with the number of the deflection cylinder assembly;

[0031] The inner circle of the middle part of the auxiliary positioning disk is provided with a circle of rotating auxiliary grooves, and the number of the auxiliary grooves is consistent with the number of guide grooves in the guide disc;

[0032] The deflection of the card issuing coil is limited by the guide slot and / or the auxiliary slot.

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

[0034] The base 1 of the hairpin coil is manually inserted into the corresponding deflection cylinder assembly in turn, and the base 2 at the other end of the hairpin coil passes through the auxiliary groove and the guide slide groove setting accordingly. Then the driving motor is started to drive the driving disk to rotate, and the driving disk drives multiple sets of transmission gears to rotate synchronously. The transmission gear drives the extension sleeve to rotate, and the extension sleeve drives the base 1 to deflect. The base 1 drives the hairpin coil to deflect, and multiple sets of hairpin coils deflect synchronously to tighten the loose coil tube. The tightened coil tube is grasped by an external grasping device, and the lifting cylinder is started to drive the ejection plate to move up, and the ejection plate drives the limit ring to rise, applying thrust to the base 2 of the tightened coil tube. At the same time, the external air source is connected to the air vent to allow high-speed airflow to enter the air vent, so that the coil tube can be taken out of the device more conveniently.

[0035] Beneficial effects of the present invention:

[0036] The modular design of the deflection cylinder assembly of the present invention makes it possible to easily replace the sleeve to adapt to the corresponding hairpin coil when faced with hairpin coils with different cross-section sizes or shapes, so that the device of this embodiment can adapt to the tightening of various hairpin coils, improve the versatility of the device, and thus save equipment costs. In addition, there is no need to disassemble the entire deflection cylinder assembly when replacing the sleeve, which saves the work of aligning the transmission gear and the drive disk during installation, thereby saving time and improving processing efficiency.

[0037] In the present invention, the first bottom leg of the hairpin coil is inserted into the corresponding deflection cylinder assembly, and then the driving assembly is deflected by the driving motor, thereby driving a plurality of groups of deflection cylinder assemblies to deflect synchronously, so as to realize the deflection and tightening of the coil cylinder formed by inserting on the plurality of groups of deflection cylinder assemblies. After the tightening of the coil cylinder, it is taken away by an external grasping mechanism. When being grasped, the ejecting and limiting assembly is used to assist in ejecting the coil cylinder, improving the ease of grasping. Specifically, two lifting cylinders synchronously lift the corresponding ejecting plates, thereby driving the limiting ring to rise, applying a thrust to the second bottom leg of the tightened coil cylinder, facilitating the more convenient removal of the coil cylinder from the device. Brief Description of the Drawings

[0038] The present invention will be further described below in conjunction with the drawings.

[0039] Figure 1 It is a schematic diagram of the loose state of the coil cylinder after insertion in the first embodiment of the present invention;

[0040] Figure 2 It is a schematic diagram of the inserted state of the coil cylinder in the first embodiment of the present invention;

[0041] Figure 3 It is a schematic diagram of the tightened state of the coil cylinder after insertion in the first embodiment of the present invention;

[0042] Figure 4 It is a schematic diagram of the overall structure in the first embodiment of the present invention;

[0043] Figure 5 It is a schematic diagram of the internal structure after removing the outer housing in the first embodiment of the present invention;

[0044] Figure 6 It is a schematic diagram of the cooperation structure of the base, the ejecting and limiting assembly and a plurality of groups of deflection cylinder assemblies of the present invention;

[0045] Figure 7 It is a schematic diagram of the driving assembly structure of the present invention;

[0046] Figure 8 It is a schematic diagram of the cooperation structure of the driving assembly and a plurality of groups of deflection cylinder assemblies of the present invention;

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

[0048] Figure 10 It is a schematic diagram of the cooperation structure of the guiding assembly and the coil cylinder of the present invention;

[0049] Figure 11 It is a schematic diagram of the ejecting and limiting assembly structure of the present invention;

[0050] Figure 12 It is a schematic diagram of the hairpin coil structure in the prior art;

[0051] Figure 13 It is a schematic diagram of the plug-in structure between the deflection cylinder assembly and the hairpin coil of the present invention;

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

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

[0054] Figure 16 It is a schematic diagram of the loose state after the coil cylinder is plugged in according to the second embodiment of the present invention;

[0055] Figure 17 It is a schematic diagram of removing the outer cover shell two according to the second embodiment of the present invention;

[0056] Figure 18 It is a schematic diagram of the cooperation between the lengthening sleeve and the limit base according to the second embodiment of the present invention Figure 1 ;

[0057] Figure 19 It is a schematic diagram of the cooperation between the lengthening sleeve and the limit base according to the second embodiment of the present invention Figure 2 ;

[0058] Figure 20 It is a schematic diagram of the structure of the limit base according to the second embodiment of the present invention.

[0059] In the figure: 1. Outer cover shell one; 11. Outer cover shell two; 2. Base; 21. Substrate; 22. Support leg; 23. Support column; 24. Assembly round hole; 25. Mounting hole; 3. Driving assembly; 30. Driving disc; 31. Weight reduction groove; 32. Connecting column; 33. Driving tooth; 34. Limit rod; 4. Ejecting limit assembly; 41. Limit ring; 42. Ejecting plate; 43. Guide hole; 44. Limit arc groove one; 5. Deflection cylinder assembly; 51. Base column; 511. Base column main body; 512. Limit round table; 513. Assembly sliding groove; 514. Connecting guide column; 515. Ventilation hole; 52. Sleeve; 520. Assembly groove; 521. Insertion guide; 522. Removal guide; 523. Clamping groove; 53. Transmission gear; 54. Lengthening sleeve; 6. Guide assembly; 60. Guide disc; 61. Guide sliding groove; 62. Matching round groove; 7. Auxiliary positioning disc; 71. Auxiliary groove; 72. Connecting column; 8. Connecting shaft; 9. Limit base; 91. Fixing hole; 92. Limit arc groove two; 100. Hairpin coil; 101. Bottom foot one; 102. Bottom foot two; 200. Coil cylinder. Detailed implementation manners

[0060] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0061] The present invention provides an automotive motor stator coil tightening device for tightening a coil bobbin 200, where as Figure 2 shown, the coil bobbin 200 is formed by combining a plurality of hairpin coils 100 with a rectangular cross-section, and as specifically Figure 12 shown, the hairpin coil 100 is U-shaped, including two parallel straight-section bottom feet 101 and 102, and the bottom feet 101 and 102 are connected by a bent section to form a U-shaped hairpin coil 100.

[0062] Embodiment 1

[0063] As Figures 1 - 15 shown, this embodiment provides an automotive motor stator coil tightening device. 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 driving assembly 3 is provided at the bottom of the base 2. The tails of the plurality of deflection cylinder assemblies 5 are all connected to the driving assembly 3, and the driving assembly 3 is connected to a driving 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 driving motor.

[0064] Furthermore, as Figure 5 and Figure 6 shown, an ejection limiting assembly 4 is provided on the top of the base 2. The ejection limiting assembly 4 is sleeved outside the deflection cylinder assembly 5, and the plurality of deflection cylinder assemblies 5 are arranged in sequence to surround a circular area. The ejection limiting assembly 4 is sleeved on the outer diameter of the circular area. A guiding assembly 6 is also provided on the top of the base 2. The guiding assembly 6 is located above the ejection limiting assembly 4 and is also located outside the circular area, playing a guiding role in tightening the coil bobbin 200.

[0065] During the operation of this embodiment, by inserting the bottom foot 101 of the hairpin coil 100 into the corresponding deflection cylinder assembly 5, and then driving the driving assembly 3 to deflect by the driving motor, thereby driving the synchronous deflection of the plurality of deflection cylinder assemblies 5, the coil bobbin 200 formed by being inserted on the plurality of deflection cylinder assemblies 5 is deflected and tightened. After tightening, the coil bobbin 200 is taken away by an external grasping mechanism. When being grasped, the ejection limiting assembly 4 assists in ejecting the coil bobbin 200 to improve the ease of grasping.

[0066] It should be noted in this embodiment that asFigures 1 - 4 As shown in the figure, an outer housing 1 is also provided outside the combined structure composed of a base 2, a driving component 3, an ejection limiting component 4, a deflecting cylinder component 5 and a guiding component 6, which is used to protect the internal combined structure and prevent other external uncertain factors (such as flying debris entering) from affecting the operation of the entire device. And the unified outer housing 1 makes the appearance of the entire structure more beautiful and improves the product satisfaction.

[0067] Further, as Figure 6 and Figure 9 shown, the base 2 in this embodiment includes a substrate 21, the main body of the substrate 21 is in a disc shape, and multiple groups of protruding connecting parts are distributed around the main body. A support leg 22 is connected to the bottom of each connecting part, and the multiple support legs 22 are connected to the corresponding positions on the operating table. The connection method is not specifically limited and can be welding or bolted fixed connection. A plurality of groups of assembly round holes 24 are formed in the middle of the substrate 21, and the multiple groups of assembly round holes 24 are arranged in a circle around the center of the substrate 21 main body. A group of deflecting cylinder components 5 are rotatably installed in each assembly round hole 24. The base 2 is used as the base for the tightening action to support each part arranged on it.

[0068] Further, as Figure 7 shown, the number of the deflecting cylinder components 5 in this embodiment is the same as the number of the assembly round holes 24 and they correspond one by one. The deflecting cylinder components 5 are rotatably arranged in the corresponding assembly round holes 24 and are connected to the driving component 3 arranged at the bottom of the substrate 21. Specifically, as Figures 7 - 9 shown, the driving component 3 in this embodiment includes a driving disk 30. A driving tooth 33 is provided on the outer shaft surface of the driving disk 30, and the driving tooth 33 meshes with multiple groups of deflecting cylinder components 5. A connecting column 32 is installed at the center of the driving disk 30, and the connecting column 32 is connected to the output shaft of the driving motor on the operating table to realize the driving of the deflection of the driving disk 30. And multiple groups of limiting rods 34 are arranged on the top surface of the driving disk 30. The multiple groups of limiting rods 34 are symmetrically distributed around the center of the driving disk 30, and balls (not shown in the figure) are installed at the tops of the multiple groups of limiting rods 34. The limiting rods 34 are adapted to the corresponding annular grooves (not shown in the figure) opened at the bottom of the substrate 21 through the balls. By restricting the distance between the driving disk 30 and the substrate 21 in multiple directions, the driving disk 30 moves more stably during the deflection process, and further the cooperation between the driving disk 30 and the deflecting cylinder components 5 is more precise and stable, avoiding the fluctuation of power transmission (wherein, when the driving disk 30 deflects, due to some external reasons such as assembly gaps, the driving disk 30 may rotate unstably, and the fluctuation will be amplified at the edge, affecting the stability of the meshing relationship with the deflecting cylinder components 5).

[0069] It should be noted that a plurality of groups of weight-reducing grooves 31 are provided on the circumference of the driving disk 30 in this embodiment. The plurality of groups of weight-reducing grooves 31 are arranged around the center of the driving disk 30 to reduce the weight of the driving disk 30 and save material costs. Furthermore, by reducing the weight, the probability of fluctuations can also be reduced.

[0070] Furthermore, if Figures 7 - 8 and Figures 12 - 15 As shown, the above-mentioned deflection cylinder assembly 5 includes a base column 51 rotatably set in the assembly circular hole 24, and a transmission gear 53 is sleeved on the bottom of the base column 51. The transmission gear 53 is meshed and connected with the driving teeth 33 of the driving disk 30 to realize the power transmission from the driving disk 30 to the base column 51, and a sleeve 52 is sleeved on the top of the base column 51. The sleeve 52 is used to receive the bottom foot 101 of the card-issuing coil 100, thereby driving the card-issuing coil 100 to deflect, and multiple groups of card-issuing coils 100 are deflected synchronously to reach a tightened state.

[0071] Among them, Figure 15 As shown, the above-mentioned base column 51 includes a base column body 511, and a limiting truncated cone 512 is arranged at the bottom of the base column body 511. The outer diameter of the limiting truncated cone 512 is slightly larger than that of the base column body 511, wherein the outer diameter of the base column body 511 is adapted to the assembly circular hole 24 and is used to rotate in the assembly circular hole 24. The outer diameter of the limiting truncated cone 512 is larger than the assembly circular hole 24, and the base column 51 is limited when it is installed from the bottom surface of the substrate 21, and a connecting guide column 514 is also arranged at the bottom center of the limiting truncated cone 512. The above-mentioned transmission gear 53 is fixedly sleeved on the connecting guide column 514, and four groups of assembly slide grooves 513 are symmetrically opened on the axial surface of the base column body 511. The four groups of assembly slide grooves 513 extend downward and penetrate the limiting truncated cone 512. The through assembly slide grooves 513 facilitate the use of wire cutting when processing the base column 51, thereby simplifying the processing difficulty.

[0072] Furthermore, specifically Figure 14 As shown, the sleeve 52 in this embodiment is arranged in a circular shape, and an assembly groove 520 adapted to the base foot 101 is opened inside the sleeve 52, and an insertion guide 521 is arranged at the head of the assembly groove 520, wherein the insertion guide 521 is a trumpet shape opening outward, and a clamping groove 523 is further opened at the bottom end of the sleeve 52, and clamping platforms are arranged on the four walls of the clamping groove 523, and four groups of clamping platforms are correspondingly slidably connected with the four groups of assembly slide grooves 513, and the sleeve 52 is stably and accurately inserted into the base column 51 through the clamping platforms to realize the assembly of the deflection cylinder assembly 5.

[0073] Through the modular design of the deflection cylinder assembly 5, when facing hairpin coils 100 with cross-sections of different sizes or shapes, the sleeve 52 can be conveniently replaced to adapt to the corresponding hairpin coil 100. Furthermore, the device of this embodiment can adapt to the tightening of various hairpin coils 100, improving the versatility of the device, saving equipment costs, and when replacing the sleeve 52, it is not necessary to disassemble the entire deflection cylinder assembly 5, saving the work of aligning the transmission gear 53 and the drive disk 30 during installation, thus saving time and improving processing efficiency.

[0074] It should be noted in this embodiment that the sleeve 52 is connected to the base post 51 by an internal hexagonal screw, and the internal hexagonal screw is only provided on one side to play a role in preventing incorrect installation. At the same time, the unified installation position makes the deflection directions and angles of the assembly grooves 520 of multiple groups of sleeves 52 the same during installation (the angle is the deflection angle between the circular connection line from the circular shape of the substrate 21 to the circular shape of the sleeve 52 of the assembly groove 520).

[0075] In this embodiment, the specific operation process of the deflection cylinder assembly 5 is as follows Figure 13 As shown, insert the first bottom leg 101 of the hairpin coil 100 into the correspondingly adapted assembly groove 520. The insertion guide 521 plays a guiding role to make the manual insertion smoother. After insertion, the transmission gear 53 receives the power provided by the drive disk 30, drives the base post 51 to deflect, the deflected base post 51 drives the sleeve 52 to deflect, and multiple groups of deflection cylinder assemblies 5 deflect synchronously, then the coil cylinder 200 is tightened from the inserted loose state (such as Figure 2 ) to the tightened state (such as Figure 3 );

[0076] Furthermore, when inserting hairpin coils 100 of other sizes, first disassemble the sleeve 52 on the base post 51 and replace it with a sleeve 52 with an adapted assembly groove 520, and then fix it to the base post 51 with an internal hexagonal screw. During the entire replacement process, it is not necessary to disassemble the transmission gear 53 and the drive disk 30 that have been aligned and matched, further saving the alignment time and improving the processing efficiency.

[0077] Furthermore, as shown in Figure 5 and Figure 6As shown, multiple groups of support columns 23 are symmetrically arranged at the top of the substrate 21 in this embodiment. A guiding assembly 6 is installed on the top of the support columns 23. The guiding assembly 6 includes a guiding disc 60. An annular rotating guiding chute 61 is provided in the inner circle of the guiding disc 60. The number of the guiding chutes 61 is the same as that of the deflection cylinder assemblies 5, and the guiding chutes 61 are perpendicular to the deflection cylinder assemblies 5. The guiding chutes 61 extend outward from the side close to the deflection cylinder assemblies 5. The groove width of the guiding chutes 61 is adapted to the outer diameter of the sleeves 52, and the guiding chutes 61 are arc-shaped. The rotating direction is opposite to the rotating direction of the sleeves 52 during operation. That is, when the sleeves 52 rotate clockwise during operation, the rotating directions of the multiple guiding chutes 61 are counterclockwise (as Figure 5 shown).

[0078] Through the guiding chutes 61 in the guiding disc 60 that cooperate with the deflection cylinder assemblies 5, when the first feet 101 of each hairpin coil 100 deflect, the second feet 102 can slide along the guiding chutes 61, thereby restricting the deflection of the hairpin coil 100, making the deflection more stable, and separating the second feet 102 from each other to avoid mutual influence, and further making the tightening action more consistent.

[0079] Furthermore, in order to make it easier for the external grasping device to grasp the tightened coil cylinder 200, a jacking and limiting assembly 4 is provided between the base 2 and the guiding assembly 6, specifically as Figure 6 and Figure 11 shown. The above-mentioned jacking and limiting assembly 4 includes a limiting ring 41. Multiple groups of first limiting arc grooves 44 are provided on the inner axial surface of the limiting ring 41. The multiple groups of first limiting arc grooves 44 are arranged in a circular shape around the center of the limiting ring 41, and the multiple groups of first limiting arc grooves 44 are all adapted to the sleeves 52 in the corresponding deflection cylinder assemblies 5, thereby stably supporting the rotating deflection cylinder assemblies 5.

[0080] And ejector plates 42 are further 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 protrude from the outer housing 1, and the bottom is connected to a lifting cylinder (not shown in the figure) on the operating table. By synchronously lifting the corresponding ejector plates 42 through the two groups of lifting cylinders, the limiting ring 41 is driven to rise, and a thrust is applied to the second feet 102 of the tightened coil cylinder 200, facilitating the coil cylinder 200 to be more conveniently taken out of the device.

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

[0082] Install the assembled device on the operating table, connect the connecting column 32 to the driving motor, and connect the ejecting plate 42 to the corresponding lifting cylinder. Then, manually insert the first bottom leg 101 of the hairpin coil 100 into the corresponding deflection cylinder assembly 5 in sequence. The second bottom leg 102 at the other end of the hairpin coil 100 is correspondingly arranged through the guiding chute 61. The number of the guiding chutes 61 separated by the first bottom leg 101 and the second bottom leg 102 is determined according to the design. Then, start the driving motor to drive the driving disk 30 to rotate. The driving disk 30 drives a plurality of transmission gears 53 to rotate synchronously. The transmission gears 53 drive the sleeve 52 to rotate. The sleeve 52 drives the first bottom leg 101 to deflect. The first bottom leg 101 drives the hairpin coil 100 to deflect. A plurality of hairpin coils 100 deflect synchronously to tighten the loose coil cylinder 200. After tightening, grab the tightened coil cylinder 200 through an external grasping device, and start the lifting cylinder to drive the ejecting plate 42 to move upward. The ejecting plate 42 drives the limiting ring 41 to rise, applying a thrust to the second bottom leg 102 of the tightened coil cylinder 200, facilitating the more convenient removal of the coil cylinder 200 from the device.

[0083] Embodiment 2

[0084] In order to further improve the stability of the deflection of the hairpin coil 100, in this embodiment, an auxiliary positioning disk 7 structure is added on the basis of Embodiment 1, and a lengthened sleeve 54 is used to replace the sleeve 52 to provide a larger range of insertion support for the first bottom leg 101.

[0085] As shown in Figure 16 and Figure 17 , in this embodiment, an auxiliary positioning disk 7 is provided at the top of the guiding component 6. Among them, a plurality of mating circular grooves 62 are formed on the axial surface of the top of the guiding disk 60 in Embodiment 1, and a plurality of connecting columns 72 are symmetrically arranged on the bottom surface of the auxiliary positioning disk 7. The number of the connecting columns is the same as that of the mating circular grooves 62 and they correspond one by one. Through the connection between the connecting columns 72 and the mating circular grooves 62, the connection between the auxiliary positioning disk 7 and the guiding component 6 is realized.

[0086] An auxiliary groove 71 for rotation is formed in the inner circle of the middle part of the auxiliary positioning disk 7. The number of the auxiliary grooves 71 is the same as that of the guiding chutes 61 in the guiding disk 60, and the shapes and rotation directions are the same. When the auxiliary positioning disk 7 is installed on the top of the guiding disk 60, the auxiliary groove 71 is in the same position as and corresponds to the guiding chute 61. Through the two-end chute structure (auxiliary groove 71 + guiding chute 61), the limiting contact area with the second bottom leg 102 is increased, and further, the deflection of the hairpin coil 100 is more fully restricted, making the deflection more stable.

[0087] Due to the increase in the internal structure, in this embodiment, the outer housing two 11 with a larger height dimension is used to replace the outer housing one 1 to protect the internal structure of the overall device.

[0088] It should be noted that in this embodiment, multiple groups of auxiliary positioning discs 7 can be provided 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 during deflection.

[0089] Furthermore, as Figures 18 - 20 , in order to further increase the deflection driving area of the first foot 101 (i.e., the contact area between the first foot 101 and the assembly groove 520), make the force on the first foot 101 more uniform and stable during deflection, and avoid partial torsional deformation of the first foot 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 exactly the same as that of the sleeve 52, only the size is increased in terms of length.

[0090] By using the extended sleeve 54, the contact area between the first foot 101 and the assembly groove 520 is increased. Thus, when deflecting and under force, the first foot 101 is directly stressed in a larger range, avoiding slight torsional deformation.

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

[0092] Specifically, as Figure 20 shown, in this embodiment, the limiting base 9 includes an annular body. A plurality of groups of second limiting arc grooves 92 are formed on the outer axial surface of the body. The plurality of groups of second limiting arc grooves 92 surround the center of the body to form a circle, and each group of second limiting arc grooves 92 is adapted to the corresponding extended sleeve 54. The extended sleeve 54 can deflect in the second limiting arc grooves 92 to achieve support. Further, an installation hole 25 is formed in the center of the substrate 21 in the first embodiment, a connecting shaft 8 is installed in the installation hole 25, and a fixing hole 91 is formed 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] Even further, since the use of the extended sleeve 54 increases the contact area between the first foot 101 and the assembly groove 520, after deflection, the frictional force for the gripping device to lift is greater. Therefore, this embodiment provides a removal guide 522 at the bottom of the assembly groove 520 of the extended sleeve 54 (as Figure 14As shown, the removal guide 522 is in the shape of a horn with an opening facing outwards. After the first bottom foot 101 is inserted, there is a gap between the bottom end part area and the removal guide 522. Further, a ventilation hole 515 is provided on the base column 51. The ventilation hole 515 penetrates the assembly groove 520 and the outside. By introducing a high-speed air flow from the outside, on the one hand, it ejects the first bottom foot 101, and on the other hand, it enters the mating interface between the first bottom foot 101 and the assembly groove 520 through the inclined surface of the removal guide 522, reducing the frictional force during lifting when grasped from the outside.

[0094] And further, by ventilating the deflection cylinder assembly 5 from the outside, after the coil cylinder 200 is grasped, each deflection cylinder assembly 5 can also be cleaned, avoiding dust or other impurities from the outside from affecting the insertion of the hairpin coil 100 next time, indirectly improving the working efficiency.

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

[0096] Install the assembled device on the operating table. The connecting column 32 is connected to the driving motor, the ejecting plate 42 is connected to the corresponding lifting cylinder, and the ventilation hole 515 is connected to the external air source. Then, the operator sequentially inserts the first bottom foot 101 of the hairpin coil 100 into the corresponding deflection cylinder assembly 5. The second bottom foot 102 at the other end of the hairpin coil 100 is correspondingly arranged through the auxiliary groove 71 and the guiding sliding groove 61. Then, start the driving motor to drive the driving disk 30 to rotate. The driving disk 30 drives a plurality of transmission gears 53 to rotate synchronously. The transmission gears 53 drive the lengthened sleeve 54 to rotate. The lengthened sleeve 54 drives the first bottom foot 101 to deflect. The first bottom foot 101 drives the hairpin coil 100 to deflect. A plurality of hairpin coils 100 deflect synchronously to tighten the loose coil cylinder 200. Grasp the tightened coil cylinder 200 through the external grasping device, and start the lifting cylinder to drive the ejecting plate 42 to move upward. The ejecting plate 42 drives the limiting ring 41 to rise, applying a thrust to the second bottom foot 102 of the tightened coil cylinder 200. At the same time, the external air source is connected to introduce a high-speed air flow into the ventilation hole 515, facilitating the more convenient removal of the coil cylinder 200 from the device.

[0097] In the description of the present invention, it should be understood that the terms "upper", "lower", "left", "right", etc. indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, as well as a specific orientation structure and operation. Therefore, it cannot be understood as a limitation to the present invention. In addition, "first" and "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Therefore, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise stated, the meaning of "a plurality" is two or more.

[0098] In the description of the present invention, it should be noted that unless otherwise clearly specified and defined, the terms "installed", "connected", "connected" and the like should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0099] The above has described in detail an embodiment of the present invention, but the content described is only a preferred embodiment of the present invention and cannot be considered as limiting the scope of implementation of the present invention. All equivalent changes and improvements made according to the scope of the application of the present invention should still fall within the scope covered by the patent of the present invention.

Claims

1. A tightening device for a stator coil of an automobile motor, for tightening a coil barrel (200), wherein the coil barrel (200) is formed by combining a plurality of hairpin coils (100), wherein the hairpin coil (100) comprises a first foot (101) and a second foot (102), characterized in that: include: A base (2), wherein the base (2) is mounted on an operating table; A driving assembly (3), wherein the driving assembly (3) is arranged at the bottom of the base (2); A deflection cylinder assembly (5), wherein a plurality of deflection cylinder assemblies (5) are provided, and the plurality of deflection cylinder assemblies (5) are rotatably provided on the base (2) and connected to the driving assembly (3); The deflection cylinder assembly (5) comprises a base column (51), a transmission gear (53) is sleeved on the bottom of the base column (51), and a sleeve (52) or an extended sleeve (54) is sleeved on the top of the base column (51); An ejection limiting assembly (4), wherein the ejection limiting assembly (4) is arranged on the top of the base (2), and the ejection limiting assembly (4) is sleeved on the outside of the plurality of deflection cylinder assemblies (5).

2. The automobile motor stator coil tightening device according to claim 1, characterized in that: The base (2) comprises a base plate (21), a plurality of supporting legs (22) are arranged around the bottom of the base plate (21), a plurality of groups of assembly circular holes (24) are provided in the middle of the base plate (21), the plurality of groups of assembly circular holes (24) are arranged in a circle around the center of the base plate (21), and a group of the deflection cylinder components (5) are rotatably mounted in each of the assembly circular holes (24).

3. The automobile motor stator coil tightening device according to claim 1 or 2, characterized in that: The driving assembly (3) comprises a driving disc (30), the outer axial surface of the driving disc (30) is provided with driving teeth (33), the driving teeth (33) are meshed with multiple groups of deflection cylinder assemblies (5), and a connecting column (32) is installed at the center of the driving disc (30), and the connecting column (32) is connected to an external driving motor.

4. The automobile motor stator coil tightening device according to claim 3, characterized in that: The top surface of the driving disk (30) is provided with a plurality of groups of limiting rods (34), and the tops of the plurality of groups of limiting rods (34) are all installed with balls, and the limiting rods (34) are adapted to the corresponding annular grooves provided at the bottom of the base plate (21) through the balls.

5. The automobile motor stator coil tightening device according to claim 1, characterized in that: The ejection limiting assembly (4) comprises a limiting circular ring (41), the inner axial surface of the limiting circular ring (41) is provided with a plurality of groups of limiting arc grooves (44), and the plurality of groups of limiting arc grooves (44) are all adapted to the deflection cylinder assemblies (5) at corresponding positions; Ejector plates (42) are also provided on both sides of the limiting circular ring (41), and the outer ends of the ejector plates (42) are connected to the jacking cylinders on the operating table; When in operation, the ejection limiting assembly (4) is pushed upward by the lifting cylinder, exerting a thrust on the second foot (102) of the tightened coil drum (200), thereby facilitating the removal of the coil drum (200).

6. The automobile motor stator coil tightening device according to claim 3, characterized in that: The transmission gear (53) is meshedly connected with the driving teeth (33) of the driving disc (30) to achieve power transmission from the driving disc (30) to the base column (51); The sleeve (52) or the extended sleeve (54) is used to receive the base 1 (101) of the hairpin coil (100).

7. The automobile motor stator coil tightening device according to claim 6, characterized in that: The base column (51) comprises a base column body (511), a limiting truncated cone (512) is arranged at the bottom of the base column body (511), a connecting guide column (514) is arranged at the bottom center of the limiting truncated cone (512), a transmission gear (53) is fixedly sleeved on the connecting guide column (514), and four groups of assembly sliding grooves (513) are arranged on the axial surface of the base column body (511); The sleeve (52) is provided with an assembly groove (520) inside, the bottom end of the sleeve (52) is provided with a clamping groove (523), the four walls of the clamping groove (523) are provided with clamping platforms, and four groups of the clamping platforms are correspondingly slidably connected with the four groups of the assembly sliding grooves (513); The structure of the extended sleeve (54) is consistent with that of the sleeve (52).

8. The automobile motor stator coil tightening device according to claim 7, characterized in that: A removal guide (522) is provided at the bottom of the assembly groove (520) of the extension sleeve (54), and a vent hole (515) is provided on the base column (51); The removal guide (522) and the vent hole (515) cooperate to facilitate the ejection of the base foot (101).

9. The automobile motor stator coil tightening device according to claim 8, characterized in that: It also includes a guide assembly (6) and / or an auxiliary positioning plate (7), wherein the guide assembly (6) and / or the auxiliary positioning plate (7) are arranged on the top of the base (2) to guide and limit the deflection of the coil tube (200); The guide assembly (6) comprises a guide disc (60), the inner ring of which is provided with a circle of rotatable guide grooves (61), and the number of the guide grooves (61) is the same as the number of the deflection cylinder assembly (5); The inner circle of the middle part of the auxiliary positioning disk (7) is provided with a circle of rotating auxiliary grooves (71), and the number of the auxiliary grooves (71) is the same as the number of the guide sliding grooves (61) in the guide disc (60); The deflection of the card-issuing coil (100) is limited by the guide slot (61) and / or the auxiliary slot (71).

10. A method for using the automobile motor stator coil tightening device according to claim 9, characterized in that: include: The first foot (101) of the hairpin coil (100) is manually inserted into the corresponding deflection cylinder assembly (5), and the second foot (102) at the other end of the hairpin coil (100) is correspondingly passed through the auxiliary groove (71) and the guide slide groove (61). Then, the driving motor is started to drive the driving disk (30) to rotate, and the driving disk (30) drives multiple sets of transmission gears (53) to rotate synchronously, and the transmission gears (53) drive the extension sleeve (54) to rotate, and the extension sleeve (54) is extended. The long sleeve (54) drives the base foot (101) to deflect, and the base foot (101) drives the hairpin coil (100) to deflect, and the multiple groups of hairpin coils (100) deflect synchronously, so that the loose coil tube (200) is tightened, and the tightened coil tube (200) is grabbed by an external grabbing device, and the lifting cylinder is started to drive the ejection plate (42) to move upward, and the ejection plate (42) drives the limit ring (41) to rise, so as to tighten the tightened coil tube (200). The second foot (102) applies thrust, and at the same time, an external air source is connected to the vent hole (515) to introduce high-speed airflow. The coil barrel (200) can be taken out of the device more conveniently.

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