Butt-weld terminal structure for integral brushless motor

Abstract

The utility model discloses a butt-welding terminal structure for an integral brushless motor. The butt-welding terminal structure for the integral brushless motor comprises a long butt-welding terminal structure and a short butt-welding terminal structure. According to the utility model, the long and short butt-welding terminals are matched with different winding and wire passing modes, and the hook structures of the butt-welding terminals are welded with the U-shaped bonding pads of the PCB in an embedded manner, so that the triangular parallel series connection and star parallel series connection modes of all the three-phase six-slot stator windings are realized, and the output of the motor is realized by using the tail ends of the long butt-welding terminals. Then, in consideration of the short creepage distance between the conductive part and the metal casing and the iron cover, the plastic sheath is specially designed to ensure the insulation performance. The four waist-shaped and circular vent holes on the PCB, the plastic sheath and the iron cover are matched with the groove shape of the stator lamination, so that the smoothness of the air channel in the motor is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of brushless motor machinery, in particular to a butt welding terminal structure for an integral brushless motor. Background Art

[0002] After the traditional three-phase six-slot brushless stator winding is completed, the paint on the wire tail is usually removed by physical or chemical methods, the wire tail is tinned, and then copper tape is used to fix it to the lead wire, and finally a heat shrink tube is used for insulation. The physical method of removing the paint on the wire tail is easy to damage the wire, and the risk of wire breakage after the motor is running increases; the chemical method of removing the paint is not only very dangerous for employees to operate, but also the wire tail after the paint is removed needs to be tinned immediately, otherwise it will quickly oxidize and affect its conductivity. The process of fixing the copper tape to the lead wire and insulating it with a heat shrink tube is not only cumbersome, but the solder point is too large and hard to be easily arranged, and the burrs on the solder point are easy to pierce the heat shrink tube, resulting in poor stator insulation.

[0003] The industry has improved the traditional three-phase six-slot brushless stator winding wire tail processing, such as the delta parallel connection method, by designing a bakelite base block on the side of the stator upper wire frame, on which there are three welding terminals connected to the winding. However, this method is very complicated on the one hand, and the wires are easily short-circuited between phases after the wires are damaged. On the other hand, the design of the side exceeds the outer diameter of the stator, so this special-shaped stator is difficult to install in a round casing and is not very versatile. In addition, this method cannot be applied to all three-phase six-slot brushless stator winding delta parallel series and star parallel series methods. Utility Model Content

[0004] The utility model aims to provide an integrated brushless motor butt welding terminal structure to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an integrated brushless motor butt welding terminal structure, comprising a housing assembly, a rotor assembly, a stator assembly and an iron cover, characterized in that the housing assembly comprises a chrysanthemum piece, an output end bearing and a housing, and the chrysanthemum piece rivets the output end bearing in the bearing chamber of the housing;

[0006] The rotor assembly comprises an input end bearing, an input end balancing block, a rotor hoop, a magnet, a rotor lamination, a shaft, an output end balancing block, a fan blade retaining ring, a fan blade and a bearing retaining ring. The shaft is pressed into the inside of the rotor lamination, four magnets are alternately adhered to the surface of the rotor lamination with anaerobic adhesive according to NSNS, the two ends of the rotor lamination are inserted into the rotor hoop, and the input end balancing block and the output end balancing block are pressed into at the same time. The output end of the shaft is pre-pressed into a fan blade retaining ring and then pressed into the fan blade, the input end of the shaft is pressed into the input end bearing, and finally the bearing retaining ring is pressed into the output end of the shaft;

[0007] The stator assembly comprises a wave pad, a plastic sheath, a PCB board, a short butt welding terminal, a long butt welding terminal, an upper bobbin, a winding, a stator lamination and a lower bobbin. The upper bobbin and the lower bobbin are installed in the stator lamination, the winding is wound in the stator lamination slot, the short butt welding terminal and the long butt welding terminal are inserted into the corresponding slot of the upper bobbin, and the wire tail of the winding is hung on the butt welding hook for spot welding, the PCB board is buckled at the corresponding position of the upper bobbin, and the soldering hooks of the short butt welding terminal and the long butt welding terminal are connected to the soldering pad on the PCB board with tin spots, and finally the plastic sheath and the wave pad are covered to complete the installation of the entire stator assembly.

[0008] Based on the above, the long touch-welding terminal includes a long touch-welding terminal output end, a notch, a protruding point, a touch-welding hook and a solder hook; the short touch-welding terminal includes a notch, a protruding point, a touch-welding hook and a solder hook; the tail of the long touch-welding terminal output end is far away from the terminal touch-welding hook; each of the two shoulders of the long touch-welding terminal has a solder hook; the solder hook structure located on the shoulder is far away from the touch-welding hook; a notch is arranged next to the solder hook on the shoulder of the long touch-welding terminal; a protruding point structure is arranged on the sides of the two legs of the long touch-welding terminal; except for the lack of the structure of the long touch-welding terminal output end, the other structural functions of the short touch-welding terminal are exactly the same as those of the long touch-welding terminal.

[0009] Based on the above, the PCB board is electrically connected to the short soldering terminal and the long soldering terminal, and the PCB board includes a U-phase solder pad, a U1-phase solder pad, a V-phase solder pad, a V1-phase solder pad, a W-phase solder pad, a W1-phase solder pad, a waist-shaped vent and a circular vent.

[0010] Based on the above, a U-phase pad is provided at the edge of the PCB board, the U-phase pad is connected to the U1-phase pad through the copper foil inside the PCB board, the V-phase pad is connected to the V1-phase pad through the copper foil inside the PCB board, and the W-phase pad is connected to the W1-phase pad through the copper foil inside the PCB board. Waist-shaped ventilation holes and circular ventilation holes are respectively provided on the surface of the PCB board.

[0011] Based on the above, the winding wire tails on the two adjacent windings are butt-welded on the butt-welding hooks, the solder bend hooks of the butt-welding terminals are embedded-welded with the pads of the PCB board through solder joints, and the winding wire tails of the two adjacent windings are butt-welded together through the butt-welding hooks, thereby realizing the end-to-end connection of the six windings, which include the first winding, the second winding, the third winding, the fourth winding, the fifth winding and the sixth winding.

[0012] Based on the above, the welding hooks of the long welding terminals respectively weld the winding wire tails of the first winding and the sixth winding, the second winding and the third winding, and the fourth winding and the fifth winding together, the first winding is connected in series with the fourth winding through the lower wire rack, the second winding is connected in series with the fifth winding through the lower wire rack, and the third winding is connected in series with the sixth winding through the lower wire rack.

[0013] Based on the above, the starting winding tail of the first winding is butt-welded on the butt-welding hook of the long butt-welding terminal, the other end of the first winding is connected to the fourth winding through the lower wire frame passing wire, the winding tail on the fourth winding is butt-welded on the butt-welding hook of the short butt-welding terminal opposite to the long butt-welding terminal, the starting winding tail of the third winding is butt-welded on the butt-welding hook of the long butt-welding terminal, the other end of the third winding is connected to the sixth winding through the lower wire frame passing wire, the winding tail at the end of the sixth winding is butt-welded on the butt-welding hook of the short butt-welding terminal opposite to the long butt-welding terminal, the starting winding tail of the fifth winding is butt-welded on the butt-welding hook of the short butt-welding terminal, the other end of the fifth winding is connected to the second winding through the lower wire frame passing wire, the winding tail at the end of the second winding is butt-welded on the butt-welding hook of the long butt-welding terminal opposite to the short butt-welding terminal, the piercing terminal on the winding pierces the paint of the three lower wire frame passing wires and short-circuits them, and tins are applied to reinforce them to ensure their conduction.

[0014] Based on the above, the winding tail of the first winding starting from the welding terminal is welded on the welding hook of the long welding terminal, the other end of the first winding is connected in series with the fourth winding through the lower wire frame passing wire, the winding tail of the third winding starting from the welding terminal is welded on the welding hook of the long welding terminal, the other end of the third winding is connected in series with the sixth winding through the lower wire frame passing wire, the winding tail of the fifth winding starting from the welding terminal is welded on the welding hook of the short welding terminal, the other end of the fifth winding is connected in series with the second winding through the lower wire frame passing wire, and the winding tails at the end of the second winding, the fourth winding and the sixth winding are short-circuited together.

[0015] Based on the above, the output end of the long butt-welding terminal passes through the matching through hole on the surface of the plastic sheath, a circular protective wall is provided on the outer edge of the plastic sheath, and four annular protrusions are provided on the top of the plastic sheath. The four waist-shaped air holes and circular air holes on the plastic sheath are respectively connected to the corresponding waist-shaped air holes and circular air holes on the PCB board and the iron cover, and cooperate with the groove type of the stator laminations.

[0016] Compared with the prior art, the beneficial effects of the utility model are:

[0017] (1) The 4.8mm wide tail of the improved long soldering terminal structure of the utility model serves as the output end of the motor, eliminating the lead wire structure, avoiding the solder point at the connection between the winding wire tail and the lead wire being too large and hard and difficult to tidy up the lead wire, and the burrs at the solder point are easy to pierce the heat shrink tube, causing poor stator insulation. In addition, the tail end of the long soldering terminal is far away from the terminal soldering hook, and the soldering energy will not damage the plating at the tail end of the long soldering terminal, ensuring the solderability of the customer's solder;

[0018] (2) The utility model utilizes the hook structure of the shoulder of the integrated brushless motor touch-welding terminal to increase the contact area between the touch-welding terminal and the PCB pad, making the tin point fuller. The two hook structures short-circuit each other to increase the motor overcurrent area. In addition, the hook structure of the shoulder is far away from the touch-welding hook. The energy during touch-welding will not damage the tin-plated layer on the surface of the hook structure of the touch-welding terminal, thereby ensuring the solderability of the touch-welding terminal and the quality of the solder.

[0019] (3) The utility model utilizes a notch next to the shoulder of the soldering terminal, which, on the one hand, narrows the path for the soldering energy to be transmitted to the hook structure of the shoulder, thereby ensuring that the plating layer on the surface of the hook of the shoulder is not damaged, and on the other hand, prevents the molten tin from flowing to the middle of the soldering terminal;

[0020] (4) The utility model utilizes the protruding point structure on the sides of the two legs of the butt welding terminal, which prevents the butt welding terminal from shifting during butt welding when the butt welding terminal is inserted into the corresponding upper wire rack groove;

[0021] (5) The utility model utilizes the embedded welding of the hook structure of the touch welding terminal and the U-shaped pad of the PCB board, combined with the inherent path of the PCB itself, and through four different winding connection and wire passing methods, a common structure is used to realize the delta parallel series and star parallel series modes of all three-phase six-slot stator windings. This embedded welding ensures the welding strength of the touch welding terminal and also ensures good conduction performance between the touch welding terminal and the PCB board;

[0022] (6) The utility model increases the creepage distance between the stator live part and the metal casing and iron cover by providing a plastic sheath, thereby improving the safety of the motor;

[0023] (7) The PCB board, plastic sheath and iron cover of the utility model are respectively designed with four waist-shaped and circular ventilation holes, which cooperate with the groove shape of the stator laminations to ensure the smooth flow of the air duct inside the motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is an exploded view of an embodiment of the utility model related to an integrated three-phase brushless motor;

[0025] Figure 2 Shows Figure 1 Three views of the long butt-weld terminal shown in ;

[0026] Figure 3 Shows Figure 1 Three views of the short butt welding terminal shown in;

[0027] Figure 4 Shows Figure 1 A top view of a PCB board connected to the soldering terminals as shown in ;

[0028] Figure 5a A three-dimensional diagram showing a stator assembly formed by welding terminals and embedded welding of PCB boards in a three-phase six-slot stator winding delta parallel mode;

[0029] Figure 5b Shows Figure 5a A top view of the stator assembly shown in;

[0030] Figure 6a Shows Figure 5a The winding diagram of the three-phase six-slot stator winding in delta parallel connection is shown in;

[0031] Figure 6b Shows Figure 5a The equivalent circuit diagram of the three-phase six-slot stator winding in delta parallel connection shown in;

[0032] Figure 7a The winding diagram of the three-phase six-slot stator winding in delta series is shown;

[0033] Figure 7b The equivalent circuit diagram of three-phase six-slot stator windings in delta series is shown;

[0034] Figure 8a The winding diagram of the three-phase six-slot stator winding in star parallel connection is shown;

[0035] Figure 8b The equivalent circuit diagram of three-phase six-slot stator windings in star parallel connection is shown;

[0036] Figure 9a The winding diagram of the three-phase six-slot stator winding in star series is shown;

[0037] Figure 9b The equivalent circuit diagram of three-phase six-slot stator windings connected in star series is shown;

[0038] Fig.10 A perspective view of the plastic sheath is shown.

[0039] In the figure: 1. Input end bearing; 2. Input end balance block; 3. Rotor hoop; 4. Magnet; 5. Rotor lamination; 6. Shaft; 7. Output end balance block; 8. Fan blade retaining ring; 9. Fan blade; 10. Bearing retaining ring; 11. Iron cover; 12. Wave pad; 13. Plastic sheath; 14. PCB board; 15. Short touch welding terminal; 16. Long touch welding terminal; 17. Upper wire rack; 18. Winding; 19. Stator lamination; 20. Lower wire rack; 21. Chrysanthemum piece; 22. Output end bearing; 23. Machine Shell; 24, long soldering terminal output end; 25, notch; 26, protrusion; 27, soldering hook; 28, soldering hook; 29, U-phase pad; 30, U1-phase pad; 31, V-phase pad; 32, V1-phase pad; 33, W-phase pad; 34, W1-phase pad; 35, waist-shaped vent; 36, circular vent; 37, solder joint; 38, winding wire tail; 39, lower wire rack wire passing; 40, piercing terminal; 41, matching through hole; 42, circular protective wall; 43, annular protrusion. DETAILED DESCRIPTION

[0040] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0041] See also Figure 1 The utility model is aimed at an integral three-phase brushless motor, which mainly includes a casing assembly, a rotor assembly, a stator assembly and an iron cover 11. For the casing assembly, the daisy sheet 21 rivets the output end bearing 22 in the bearing chamber of the casing 23. For the rotor assembly, the shaft 6 is first pressed into the rotor lamination 5, and the four magnets 4 are alternately adhered to the surface of the rotor lamination 5 with anaerobic adhesive according to NSNS; then the two ends of the rotor lamination 5 are inserted into the rotor hoop 3, and then the input end balance block 2 and the output end balance block 7 are pressed in at the same time; a fan blade retaining ring 8 is pre-pressed into the output end of the shaft 6, and then the fan blade 9 is pressed in; the input end of the shaft 6 is pressed into the input end bearing 1; finally, the bearing retaining ring 10 is pressed into the output end of the shaft 6. The upper wire rack 17 and the lower wire rack 20 are installed in the stator stack 19; the winding 18 is wound in the slot of the stator stack 19; the short soldering terminal 15 and the long soldering terminal 16 are inserted into the corresponding slot of the upper wire rack 17, and the wire tail of the winding 18 is hung on the soldering hook 27 for spot welding; then the PCB board 14 is buckled on the appropriate position of the upper wire rack 17, and the soldering hooks 28 of the short soldering terminal 15 and the long soldering terminal 16 are connected to the soldering pad on the PCB board 14 with tin points; finally, the plastic sheath 13 for insulation is covered to complete the complete stator assembly. Finally, the housing assembly, the rotor assembly, the stator assembly and the iron cover 11 are assembled together to form an integrated three-phase brushless motor.

[0042] See also Figure 2The utility model provides a long touch-soldering terminal 16, whose 4.8mm wide tail serves as the output end of the motor. The tail of the long touch-soldering terminal output end 24 is far away from the terminal touch-soldering hook 27, and the touch-soldering energy will not damage the plating at the tail of the long touch-soldering terminal output end 24, thereby ensuring the solderability of the customer's solder. There is a solder hook 28 on each of the two shoulders of the long touch-soldering terminal 16. The solder hook 28 structure increases the contact area between its inner wall and the solder pad of the PCB board 14, making the tin point fuller; the two solder hooks 28 located on the shoulders of the long touch-soldering terminal 16 are short-circuited to each other, thereby increasing the area of ​​motor overcurrent. In addition, the solder hook 28 structure located on the shoulder is far away from the touch-soldering hook 27, and the energy during touch-soldering will not damage the tin plating on the surface of the solder hook 28, thereby ensuring the solderability and quality of the solder. There is a notch 25 next to the solder hook 28 on the shoulder of the long soldering terminal 16. On the one hand, it narrows the path for the soldering energy to be transmitted to the solder hook 28 on the shoulder, ensuring that the coating on the surface of the solder hook 28 is not damaged; on the other hand, it prevents the molten tin from flowing to the output end 24 of the middle long soldering terminal, avoiding the corner tin connection and the plastic sheath 13 from being installed in place. There are protrusions 26 on the sides of the two legs of the long soldering terminal 16. When the long soldering terminal 16 is inserted into the corresponding upper wire frame 17 slot, it prevents the long soldering terminal 16 from shifting during soldering.

[0043] See also Figure 3 The short butt welding terminal 15 provided by the utility model has the same structure and functions as the long butt welding terminal 16 except that the output end 24 of the long butt welding terminal is missing.

[0044] See also Figure 4 The utility model provides a PCB board 14 that is connected to the short butt welding terminal 15 and the long butt welding terminal 16. The edge of the PCB board 14 has a U-phase pad 29 that is connected to the U1-phase pad 30 through the copper foil inside the PCB board 14; similarly, the V-phase pad 31 is connected to the V1-phase pad 32; and the W-phase pad 33 is connected to the W1-phase pad 34. The waist-shaped vents 35 and the circular vents 36 on the PCB board 14 ensure the smooth flow of the internal air duct of the integrated motor.

[0045] See also Figure 5a-5b The winding wire tails 38 of two adjacent windings 18 are soldered on the soldering hooks 27, and then the solder hooks 28 of the soldering terminals are embedded and soldered with the pads of the PCB board 14 through the soldering points 37, thereby ensuring the strength and quality of the soldering. The tail end of the long soldering terminal 16 serves as the output end of the motor. The notch 25 on the soldering terminal blocks the soldering points 37 from extending toward the middle of the soldering terminal.

[0046] See also Figure 6a, taking the six-slot three-phase brushless stator triangle parallel connection as an example. First, the two adjacent windings 18 are soldered together with the winding wire tails 38 through the soldering hooks 27, so that the six windings 18 are connected end to end; then, the solder hooks 28 on the shoulders of the short soldering terminal 15 and the long soldering terminal 16 are connected to the pads on the PCB board 14 by soldering; then, the conduction between U1 and U, the conduction between V1 and V, and the conduction between W1 and W are realized through the internal copper foil on the PCB board 14; finally, the output of the three phases of U1, V1 and W1 is realized through the three long soldering terminal output ends 24. Figure 6b Shown is Figure 6a In the equivalent circuit, the six windings 18 are first connected in parallel in pairs and then connected in a delta shape.

[0047] See also Figure 7a , taking the six-slot three-phase brushless stator in triangle series as an example. Figure 6a and Figure 6b The six windings 18 are defined as the first winding, the second winding, the third winding, the fourth winding, the fifth winding and the sixth winding. First, the first winding and the sixth winding, the second winding and the third winding, and the fourth winding and the fifth winding are respectively soldered together by the soldering hook 27 of the long soldering terminal 16; then, the first winding is connected in series with the fourth winding through the lower wire rack wire 39, the second winding is connected in series with the fifth winding through the lower wire rack wire 39, and the third winding is connected in series with the sixth winding through the lower wire rack wire 39; then, the solder hook 28 on the shoulder of the long soldering terminal 16 is connected to the pad on the PCB board 14 by soldering; finally, the output of the three phases U1, V and W1 is realized through the three long soldering terminal output ends 24. Figure 7b Shown is Figure 7a In the equivalent circuit, the six windings 18 are first connected in series in pairs and then connected in a delta shape.

[0048] See also Figure 8a, taking the star-connected parallel connection of a six-slot three-phase brushless stator as an example. First, the winding tail 38 starting from the first winding is welded on the welding hook 27 of the long welding terminal 16, and the other end of the first winding is connected to the fourth winding through the lower wire frame wire 39, and the winding tail 38 ending at the fourth winding is welded on the welding hook 27 of the short welding terminal 15 opposite to the long welding terminal 16. Similarly, the winding tail 38 starting from the third winding is welded on the welding hook 27 of the long welding terminal 16, and the other end of the third winding is connected to the sixth winding through the lower wire frame wire 39, and the winding tail 38 ending at the sixth winding is welded on the welding hook 27 of the short welding terminal 15 opposite to the long welding terminal 16. Finally, the starting winding tail 38 of the fifth winding is soldered to the soldering hook 27 of the short soldering terminal 16, and the other end of the fifth winding is connected to the second winding through the lower wire rack wire 39. The winding tail 38 at the end of the second winding is soldered to the soldering hook 27 of the long soldering terminal 16 opposite to the short soldering terminal 15; then, the piercing terminal 40 pierces the paint of the three lower wire rack wires 39 and short-circuits them, and tins them to reinforce them to ensure their conduction; next, the solder hooks 28 on the shoulders of the short soldering terminal 15 and the long soldering terminal 16 are connected to the soldering pads on the PCB board 14 by soldering, and the conduction between U1 and U, the conduction between V1 and V, and the conduction between W1 and W are realized through the internal copper foil on the PCB board 14; finally, the output of the three phases of U1, V1 and W1 is realized through the output ends of the three long soldering terminals. Figure 8b Shown is Figure 8a The equivalent circuit is that the six windings are connected in parallel in pairs and then in star connection.

[0049] See also Figure 9a , taking the star-type series connection of a six-slot three-phase brushless stator as an example. First, the winding wire tail 38 starting from the first winding is welded on the welding hook 27 of the long welding terminal 16, and the other end of the first winding is connected in series with the fourth winding through the lower wire frame passing line 39. Similarly, the winding wire tail 38 starting from the third winding is welded on the welding hook 27 of the long welding terminal 16, and the other end of the third winding is connected in series with the sixth winding through the lower wire frame passing line 39. Then, the winding wire tail 38 starting from the fifth winding is welded on the welding hook 27 of the short welding terminal 16, and the other end of the fifth winding is connected in series with the second winding through the lower wire frame passing line 39. Next, the winding wire tails 38 ending with the second winding, the fourth winding and the sixth winding are short-circuited together. Then, the solder hook 28 on the shoulder of the long welding terminal 16 is connected to the pad on the PCB board 14 by soldering. Finally, the three-phase output of U1, V and W1 is realized through three long soldering terminal output ends. Figure 9b Shown is Figure 9a In the equivalent circuit, the six windings 18 are first connected in series in pairs and then in star connection.

[0050] See also Fig.10The utility model provides a plastic sheath 13 that serves as an insulator, and the long soldering terminal output end 24 passes through the matching through hole 41 of the plastic sheath 13. The outer edge of the plastic sheath 13 has a circular protective wall 42 to ensure the insulation of the outer side of the soldering hook 27 and the inner wall of the housing 23. In addition, there are four annular protrusions 43 on the top of the plastic sheath 13. On the one hand, they support the lower plane of the iron cover 11 to ensure that the plastic sheath 13 does not shift; on the other hand, they increase the creepage distance between the PCB board 14 and the iron cover 11. The four waist-shaped vents 35 and the circular vents 36 on the plastic sheath 13 are connected with the corresponding waist-shaped vents 35 and the circular vents 36 on the PCB board 14 and the iron cover 11, and cooperate with the groove type of the stator laminations 19 to ensure the smooth flow of the air duct inside the motor.

[0051] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0052] The standard parts used in this application document can all be purchased from the market, and the specific connection methods of each part are connected by conventional means such as mature bolts, rivets, welding, etc. in the prior art. In addition, the machinery, parts and equipment all adopt conventional models in the prior art, and the circuit connection adopts the conventional connection method in the prior art, so no specific description is given here.

[0053] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An integrated brushless motor butt welding terminal structure, comprising a housing assembly, a rotor assembly, a stator assembly and an iron cover, characterized in that: The housing assembly comprises a chrysanthemum piece, an output end bearing and a housing, wherein the chrysanthemum piece rivets the output end bearing into a bearing chamber of the housing; The rotor assembly comprises an input end bearing, an input end balancing block, a rotor hoop, a magnet, a rotor lamination, a shaft, an output end balancing block, a fan blade retaining ring, a fan blade and a bearing retaining ring. The shaft is pressed into the inside of the rotor lamination, four magnets are alternately adhered to the surface of the rotor lamination with anaerobic adhesive according to NSNS, the two ends of the rotor lamination are inserted into the rotor hoop, and the input end balancing block and the output end balancing block are pressed into at the same time. The output end of the shaft is pre-pressed into a fan blade retaining ring and then pressed into the fan blade, the input end of the shaft is pressed into the input end bearing, and finally the bearing retaining ring is pressed into the output end of the shaft; The stator assembly comprises a wave pad, a plastic sheath, a PCB board, a short butt welding terminal, a long butt welding terminal, an upper bobbin, a winding, a stator lamination and a lower bobbin. The upper bobbin and the lower bobbin are installed in the stator lamination, the winding is wound in the stator lamination slot, the short butt welding terminal and the long butt welding terminal are inserted into the corresponding slot of the upper bobbin, and the wire tail of the winding is hung on the butt welding hook for spot welding, the PCB board is buckled at the corresponding position of the upper bobbin, and the soldering hooks of the short butt welding terminal and the long butt welding terminal are connected to the soldering pad on the PCB board with tin spots, and finally the plastic sheath and the wave pad are covered to complete the installation of the entire stator assembly.

2. The integrated brushless motor butt welding terminal structure according to claim 1, characterized in that: The long touch-welding terminal includes a long touch-welding terminal output end, a notch, a protruding point, a touch-welding hook and a solder bent hook; the short touch-welding terminal includes a notch, a protruding point, a touch-welding hook and a solder bent hook; the tail of the long touch-welding terminal output end is far away from the terminal touch-welding hook; each of the two shoulders of the long touch-welding terminal has a solder bent hook; the solder bent hook structure located on the shoulder is far away from the touch-welding hook; a notch is arranged next to the solder bent hook on the shoulder of the long touch-welding terminal; a protruding point structure is arranged on the sides of the two legs of the long touch-welding terminal; except for the lack of the structure of the long touch-welding terminal output end, the other structural functions of the short touch-welding terminal are exactly the same as those of the long touch-welding terminal.

3. The integrated brushless motor butt welding terminal structure according to claim 1, characterized in that: The PCB board is electrically connected to the short soldering terminal and the long soldering terminal, and the PCB board includes a U-phase soldering pad, a U1-phase soldering pad, a V-phase soldering pad, a V1-phase soldering pad, a W-phase soldering pad, a W1-phase soldering pad, a waist-shaped vent hole and a circular vent hole.

4. The integrated brushless motor butt welding terminal structure according to claim 3, characterized in that: A U-phase pad is arranged at the edge of the PCB board, the U-phase pad is connected to the U1-phase pad through the copper foil inside the PCB board, the V-phase pad is connected to the V1-phase pad through the copper foil inside the PCB board, and the W-phase pad is connected to the W1-phase pad through the copper foil inside the PCB board. Waist-shaped vents and circular vents are respectively arranged on the surface of the PCB board.

5. The integrated brushless motor butt welding terminal structure according to claim 1, characterized in that: The winding wire tails on two adjacent windings are butt-welded on the butt-welding hooks, and the solder bend hooks of the butt-welding terminals are embedded-welded with the pads of the PCB board through solder joints. The winding wire tails of the two adjacent windings are butt-welded together through the butt-welding hooks, thereby realizing that the six windings are connected end to end. The six windings include a first winding, a second winding, a third winding, a fourth winding, a fifth winding and a sixth winding.

6. The integrated brushless motor butt welding terminal structure according to claim 5, characterized in that: The butt welding hooks of the long butt welding terminals respectively butt weld the winding wire tails of the first winding and the sixth winding, the second winding and the third winding, and the fourth winding and the fifth winding together; the first winding is connected in series with the fourth winding through the lower wire rack passing wire, the second winding is connected in series with the fifth winding through the lower wire rack passing wire, and the third winding is connected in series with the sixth winding through the lower wire rack passing wire.

7. The integrated brushless motor butt welding terminal structure according to claim 5, characterized in that: The starting tail of the first winding is butt-welded on the butt-welding hook of the long butt-welding terminal, the other end of the first winding is connected to the fourth winding through the lower wire frame passing wire, the winding tail on the fourth winding is butt-welded on the butt-welding hook of the short butt-welding terminal opposite to the long butt-welding terminal, the starting tail of the third winding is butt-welded on the butt-welding hook of the long butt-welding terminal, the other end of the third winding is connected to the sixth winding through the lower wire frame passing wire, the ending tail of the sixth winding is butt-welded on the butt-welding hook of the short butt-welding terminal opposite to the long butt-welding terminal, the starting tail of the fifth winding is butt-welded on the butt-welding hook of the short butt-welding terminal, the other end of the fifth winding is connected to the second winding through the lower wire frame passing wire, the ending tail of the second winding is butt-welded on the butt-welding hook of the long butt-welding terminal opposite to the short butt-welding terminal, the piercing terminal on the winding pierces the paint of the three lower wire frame passing wires and short-circuits them, and tins are applied to reinforce them to ensure conduction.

8. The integrated brushless motor butt welding terminal structure according to claim 5, characterized in that: The starting tail of the first winding is welded on the welding hook of the long welding terminal, the other end of the first winding is connected in series with the fourth winding through the lower wire frame passing wire, the starting tail of the third winding is welded on the welding hook of the long welding terminal, the other end of the third winding is connected in series with the sixth winding through the lower wire frame passing wire, the starting tail of the fifth winding is welded on the welding hook of the short welding terminal, the other end of the fifth winding is connected in series with the second winding through the lower wire frame passing wire, and the winding tails at the end of the second winding, the fourth winding and the sixth winding are short-circuited together.

9. The integrated brushless motor butt welding terminal structure according to claim 1, characterized in that: The output end of the long butt-welding terminal passes through the matching through hole on the surface of the plastic sheath. A circular protective wall is arranged on the outer edge of the plastic sheath. Four annular protrusions are arranged on the top of the plastic sheath. The four waist-shaped air holes and the circular air holes on the plastic sheath are respectively connected with the corresponding waist-shaped air holes and the circular air holes on the PCB board and the iron cover, and cooperate with the groove type of the stator laminations.

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