A connection structure between a motor PCBA board and a stator assembly

Abstract

The present invention discloses a connection structure between a motor PCBA board and a stator assembly, belonging to the field of motor technology. The connection structure comprises a phase ring and a conductive connection base. The phase ring comprises a phase ring body, embedded with a first conductive insert, a second conductive insert, and a third conductive insert. The first conductive insert is provided with a first conductive link and a first winding hook, the second conductive insert is provided with a second conductive link and a second winding hook, and the third conductive insert is provided with a third conductive link and a third winding hook. The conductive connection base is embedded with a first conductive sheet, a second conductive sheet, and a third conductive sheet. The first conductive sheet, the second conductive sheet, and the third conductive sheet respectively connect the first conductive link, the second conductive link, and the third conductive link to the three phase electrical pins of the PCBA board in a one-to-one correspondence. This connection structure facilitates the connection between the PCBA board and the stator assembly while also ensuring better sealing performance.

Description

Technical Field

[0001] The present invention relates to the technical field of motors, and in particular to a connection structure between a motor PCBA board and a stator assembly. Background Art

[0002] The motor is a commonly used power device used in various industries. Patent No. 202111286404.8 discloses an outer rotor motor for driving an automobile cooling fan, including a controller assembly, the controller assembly including a shell consisting of a heat sink and a rear end cover, a conductive bracket and a PCBA board are provided in the shell, a central axis is provided on the front of the heat sink, an armature assembly is installed on the front of the heat sink, an outer rotor assembly is rotatably installed on the central axis, an inductor mounting area, a conductive bracket mounting area, a wiring harness connector area and a heat conduction platform are provided on the heat sink, the conductive bracket is placed in the conductive bracket mounting area, an inductor is provided in the inductor mounting area, a wiring harness conductive pin is provided in the wiring harness connector area, and the inductor and wiring harness conductive pin are both connected to the corresponding conductor on the PCBA board. The conductive holes are welded and fixed, and three through holes are provided on the heat dissipation seat in the conductive bracket mounting area. The conductive bracket includes three mounting hole portions, and a semi-enclosed terminal protection portion is provided on the outer periphery of the mounting hole portion. The terminal protection portion and the mounting hole portion are connected by a connecting rod, and the back of the connecting rod is provided with positioning grooves with two ends extending toward the terminal protection portion and the mounting hole portion respectively. A conductive connecting rod is installed on each mounting hole portion, and one end of the conductive connecting rod is inserted into the corresponding mounting hole portion and passes through the through hole. The middle part of the conductive connecting rod is embedded in the corresponding positioning groove. The tail end of the conductive connecting rod is a connecting terminal and is in the corresponding terminal protection portion. The connecting terminal is inserted into the corresponding conductive hole on the PCBA board and is welded and fixed. The conductive connecting rod electrically connects the armature assembly with the PCBA board. However, the connection between the PCBA board and the armature assembly (stator assembly) of this patent is not very reasonable, and has the following disadvantages: 1. The PCBA board is connected through a conductive bracket, which is placed in the conductive bracket placement area, and then three conductive connecting rods are used to penetrate the mounting hole of the conductive connecting rod and the heat sink. Then, one end of the conductive connecting rod is welded to the PCBA board, and the other end is welded to the intermediate phase ring. Since the conductive bracket itself is not fixed and is only restricted by the conductive connecting rod, the conductive bracket may become loose; 2. The sealing performance of this fixing method is poor, because the conductive connecting rod needs to penetrate the mounting hole of the conductive bracket. The heat sink is provided with a sealing sleeve with elastic deformation, which facilitates the passage of the conductive connecting rod and has a sealing effect. However, after the motor is used for a long time, the sealing sleeve will age and cause the seal to fail. Once the seal fails, a gap will be formed between the sealing sleeve and the conductive connecting rod, which is easy for water to enter, resulting in an internal short circuit and damage to the PCBA board; 3. The current PCBA board and the armature are also connected through an intermediate phase ring. Three metal hooks are evenly mounted on the intermediate phase ring. Each metal hook is provided with two harness hooks and a connecting hook. The connecting hook is used to connect with the conductive connecting rod.

[0003] The phase ring of the outer rotor motor will have the following defects during use: 1. Each time the stator winding is wound, the wire harness needs to be evenly distributed to the corresponding two wire harness hooks. Each wire harness hook will be wound with the wire harness, but when the power increases, the wire harness will also become thicker. When the hooks are clamped and welded, the wire harnesses will cross each other. In this way, the outer insulation skin of the wire harness wrapped inside the wire harness hook may not be damaged during clamping and welding, resulting in no electrical connection with other wire harnesses. In this way, the wiring of the armature assembly will be wrong and cannot work properly; 2. After the wire harness clamping and welding is completed, it is still necessary to conduct electricity through the conductive connecting rod, and the installation The conductive connecting rod also requires a conductive bracket to connect the conductive connecting rod to the PCBA board, which can prevent the conductive connecting rod from short-circuiting due to contact with other metal parts and affecting normal operation. The conductive connecting rod also needs to be connected by soldering, which is a cumbersome operation and requires accurate soldering. 3. When installing the metal guard hook, the metal guard hook is provided with embedded pins, so the intermediate phase ring needs to be provided with corresponding embedded holes to accommodate the embedded pins, which greatly increases the accuracy required for manufacturing the intermediate phase ring and increases the manufacturing cost. 4. There are too many components to be installed, which need to be manufactured separately and each component needs to be used in conjunction with each other. The precision requirements are high, and the manufacturing and production efficiency are not ideal. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a connection structure between a motor PCBA board and a stator assembly, which can make the PCBA board and the stator assembly more convenient to connect while ensuring better sealing performance.

[0005] In order to solve the above technical problems, the technical solution of the present invention is: a connection structure between a motor PCBA board and a stator assembly, the connection structure includes a phase ring and a conductive connection seat, a connection seat installation area is provided on the heat dissipation base of the motor, the conductive connection seat is fixed in the connection seat installation area and the bottom is sealed with the heat dissipation base, a cavity is provided on the conductive connection seat, the end face of the cavity is provided with a sealing ring installation groove, three through holes are provided on the heat dissipation base in the cavity, the phase ring is fixed on the stator core of the stator assembly, the phase ring includes a phase ring body made of insulating material, and the phase ring body is embedded with mutually independent first conductive insert, second conductive insert and third conductive insert, the first conductive insert is provided with a first conductive connecting rod and a first winding hook, and the second conductive insert is provided with a second conductive connecting rod and a second winding hook. Hook, a third conductive link and a third winding hook are provided on the third conductive insert, the first conductive link, the second conductive link and the third conductive link respectively pass through the through hole, the first winding hook, the second winding hook and the third winding hook are used to connect with the wiring harness of the three stator windings of the stator assembly, and a hole sealing structure for sealing the through hole is installed in the cavity, the first conductive sheet, the second conductive sheet and the third conductive sheet are embedded in the conductive connection seat, one end of the first conductive sheet, the second conductive sheet and the third conductive sheet are all extended into the cavity and are all provided with a hook, the hooks on the first conductive sheet, the second conductive sheet and the third conductive sheet are correspondingly sleeved on the first conductive link, the second conductive link and the third conductive link and welded and fixed, and the other ends of the first conductive sheet, the second conductive sheet and the third conductive sheet are respectively welded to the three phase electrical pins of the PCBA board.

[0006] As a preferred solution, the connection seat installation area is provided with an installation groove, the enclosed cavity corresponds to the installation groove, the through hole is located in the installation groove, and the hole sealing structure is provided in the installation groove.

[0007] As a preferred solution, the hole sealing structure includes a sealing plate arranged in the mounting groove, and three sealing nests are provided on the sealing plate, which are embedded in the through hole in a one-to-one correspondence. A sealing ridge is provided on the plate surface of the sealing plate and is sealed with the bottom of the mounting groove. A sealing pressure plate is provided above the sealing plate, and a clamping portion for pressing the sealing pressure plate and the sealing plate is provided on the surrounding cavity. A through hole is provided on the sealing pressure plate for facilitating the passage of the sealing nest, and the first conductive connecting rod, the second conductive connecting rod and the third conductive connecting rod all pass through the sealing nest and are sealed with the sealing nest.

[0008] As a preferred solution, the sealing ridges include outer ring sealing ridges and inner ring sealing ridges. The outer ring sealing ridges are arranged on the outer periphery of the sealing plate. The number of the inner ring sealing ridges is at least three and they respectively surround corresponding sealing nests.

[0009] As a preferred solution, a positioning structure for facilitating the positioning of the conductive connecting seat is provided between the connecting seat installation area of ​​the heat dissipation base and the conductive connecting seat.

[0010] As a preferred solution, the positioning structure includes a positioning groove or a positioning hole provided on the conductive connecting seat, and correspondingly, a positioning protrusion corresponding to the positioning groove or the positioning hole is provided on the connecting seat installation area of ​​the heat dissipation base.

[0011] As a preferred solution, the heat dissipation base is provided with a peripheral edge, which encloses the connection seat installation area, and the connection seat installation area is provided with a circle of peripheral sealing grooves for installing a sealing ring.

[0012] As a preferred solution, the first conductive insert includes a first conductive ring, the number of the first winding hooks is four and they are evenly distributed on the outer circumference of the first conductive ring, and the first conductive connecting rod is also connected to the outer circumference of the first conductive ring; the second conductive insert includes a second conductive ring, the number of the second winding hooks is four and they are evenly distributed on the outer circumference of the second conductive ring, and the second conductive connecting rod is also connected to the outer circumference of the second conductive ring; the third conductive insert includes a third conductive ring, the number of the third winding hooks is four and they are evenly distributed on the outer circumference of the third conductive ring, and the third conductive connecting rod is also connected to the outer circumference of the third conductive ring; the first conductive ring, the second conductive ring and the third conductive ring are concentrically arranged and overlapped with each other, and all the first winding hooks, the second winding hooks and the third winding hooks are evenly distributed on the circumference.

[0013] As a preferred solution, all the hook grooves on the circumferences of the first winding hook, the second winding hook and the third winding hook are located on the same plane.

[0014] As a preferred solution, the first conductive ring, the second conductive ring and the third conductive ring are each provided with an inner protrusion protruding inward and an outer protrusion protruding outward, and the outer periphery of the first conductive ring, the second conductive ring and the third conductive ring are each provided with a plurality of positioning notches, and the positioning notches on each conductive ring are arranged at equal intervals together with the corresponding four winding hooks.

[0015] After adopting the above technical solution, the effect of the present invention is: compared with the existing technology, the connection structure has the following advantages: 1. Since the heat dissipation base of the motor is provided with a connection base installation area, the conductive connection base is fixed in the connection base installation area and the bottom is sealed with the heat dissipation base, the conductive connection base is provided with an enclosure, and the end surface of the enclosure is provided with a sealing ring installation groove. The first conductive sheet, the second conductive sheet and the third conductive sheet, the first conductive connecting rod, the second conductive connecting rod and the third conductive connecting rod are all welded and fixed in the enclosure, and the bottom of the conductive connection seat is fixed and sealed with the heat dissipation base, and The end face of the enclosure is provided with a sealing ring mounting groove, so that the front and back of the entire enclosure are sealed, and the sealing effect is good, thereby better isolating the PCBA board from the outside; in addition, the conductive connection seat is fixed on the heat dissipation base, not easy to shake, and avoids loosening of the welding point; 2. Since the phase ring includes a phase ring body made of insulating material, the phase ring body is embedded with a first conductive insert, a second conductive insert and a third conductive insert that are independent of each other, the first conductive insert is provided with a first conductive connecting rod and a first winding hook, the second conductive insert is provided with a second conductive connecting rod and a second winding hook, and the third conductive insert is provided with a second conductive connecting rod and a second winding hook. A third conductive link and a third winding hook are provided on the component, the first conductive link, the second conductive link and the third conductive link respectively pass through the through hole, the first winding hook, the second winding hook and the third winding hook are used to connect with the wiring harness of the three stator windings of the stator assembly, and a hole sealing structure for sealing the through hole is installed in the cavity, and the first conductive sheet, the second conductive sheet and the third conductive sheet are embedded in the conductive connection seat, one end of the first conductive sheet, the second conductive sheet and the third conductive sheet are all extended into the cavity and are all provided with a hook, and the hooks on the first conductive sheet, the second conductive sheet and the third conductive sheet are correspondingly sleeved on The first conductive link, the second conductive link and the third conductive link are welded and fixed, and the other ends of the first conductive sheet, the second conductive sheet and the third conductive sheet are respectively welded to the three phase electrical pins of the PCBA board. Therefore, the phase ring structure is very reasonable. The three independent first conductive inserts, the second conductive inserts and the third conductive inserts are embedded in the phase ring body, and conductive links and winding hooks are respectively provided. In this way, there is no need for later assembly. You only need to fix the phase ring body to the inner hole of the stator core. At this time, each conductive link will be inserted into the hook of the corresponding conductive sheet, which facilitates welding. The overall assembly of the connection structure is simpler and faster.

[0016] In addition, since the connecting seat installation area is provided with an installation groove, the enclosure corresponds to the installation groove, the through hole is located in the installation groove, and the hole sealing structure is provided in the installation groove, the installation groove is also used to provide protection to a certain extent, and even if water seeps in, it can be prevented from flowing into the outside of the installation groove and the enclosure.

[0017] Furthermore, since the hole sealing structure includes a sealing plate arranged in the mounting groove, the sealing plate is provided with three sealing nests which are embedded in the through hole in a one-to-one correspondence, the plate surface of the sealing plate is provided with a sealing ridge which is sealed with the bottom of the mounting groove, a sealing pressure plate is provided above the sealing plate, and a pressing portion which presses the sealing pressure plate and the sealing plate is provided on the surrounding cavity, and a through hole is provided on the sealing pressure plate for facilitating the passage of the sealing nest, the first conductive connecting rod, the second conductive connecting rod and the third conductive connecting rod all pass through the sealing nest and seal with the sealing nest, the sealing effect of the hole sealing structure is very good, first of all, the sealing nest can be embedded in the through hole , the sealing nesting is used to achieve the sealing of the three conductive connecting rods, and the through-holes can also be sealed. Secondly, the sealing ridges on the sealing plate are squeezed and sealed with the bottom of the mounting groove to seal again, so that the gap between the through-hole and the sealing nesting can be better protected. Due to the thickness of the heat dissipation base, the sealing contact part between the sealing nesting and the through-hole is not thick, and the sealing part between the sealing nesting and the conductive connecting rod is the height of the entire sealing nesting. In comparison, the gap between the sealing nesting and the through-hole is more prone to sealing failure. Therefore, the above structure can improve the sealing effect between the sealing nesting and the through-hole, and the sealing reliability is higher.

[0018] Furthermore, since the sealing ridges include outer ring sealing ridges and inner ring sealing ridges, the outer ring sealing ridges are arranged on the outer periphery of the sealing plate, and the number of the inner ring sealing ridges is at least three and respectively surrounds the corresponding sealing nests, an annular sealing structure can be formed by the inner ring sealing ridges, so that water is in the area of ​​the inner ring sealing ridges, thereby preventing water from seeping out and effectively protecting the isolation of the PCBA board.

[0019] Furthermore, a positioning structure is provided between the connection base mounting area of ​​the heat dissipation base and the conductive connection base to facilitate the positioning of the conductive connection base. The positioning structure includes a positioning groove or a positioning hole provided on the conductive connection base. Correspondingly, a positioning protrusion corresponding to the positioning groove or the positioning hole is provided on the connection base mounting area of ​​the heat dissipation base. Therefore, the positioning protrusion and the positioning groove or the positioning hole facilitate the installation of the conductive connection base, ensuring the accuracy of the position.

[0020] Since the heat dissipation base is provided with a surrounding edge, the surrounding edge encloses the connection seat installation area, and the connection seat installation area is provided with a circle of peripheral sealing grooves for installing a sealing ring. The peripheral sealing groove can be used to place the sealing ring to facilitate reliable sealing between the conductive connection seat and the heat dissipation base.

[0021] Furthermore, since the first conductive insert includes a first conductive ring, the number of the first winding hooks is four and the circumference is evenly distributed on the outer circumference of the first conductive ring, and the first conductive connecting rod is also connected to the outer circumference of the first conductive ring; the second conductive insert includes a second conductive ring, the number of the second winding hooks is four and the circumference is evenly distributed on the outer circumference of the second conductive ring, and the second conductive connecting rod is also connected to the outer circumference of the second conductive ring; the third conductive insert includes a third conductive ring, the number of the third winding hooks is four and the circumference is evenly distributed on the outer circumference of the third conductive ring, and the third conductive connecting rod is also connected to the outer circumference of the third conductive ring; the first conductive ring, the second conductive ring and the third conductive ring are concentrically arranged and overlapped with each other, and all the first winding hooks, the second winding hooks and the third winding hooks are unified The circumference is evenly distributed. First, the first conductive ring, the second conductive ring and the third conductive ring are embedded in the phase ring body. Then, the phase ring body is fixedly installed in the stator core through the mounting structure. Then, the wire harness on each stator winding is wound onto the corresponding metal guard hook. Then, the metal guard hook is clamped and welded so that the wound wire harness breaks the skin to form an effective connection. Finally, the first conductive link, the second conductive link and the third conductive link are connected to the first conductive sheet, the second conductive sheet and the third conductive sheet on the conductive connection seat. The phase ring itself does not need to be assembled and is integrally formed during production. In addition, each stator winding can correspond to a set of metal guard hooks. This can ensure that the wire harness of the stator winding can be more reliably connected to the metal guard hook when clamped and welded, making the connection stable and accurate, which is especially suitable for the requirements of higher-power drive motors.

[0022] Since all the hook grooves of the first winding hook, the second winding hook and the third winding hook are on the same plane, and the stator winding is also on the same plane, the uneven height of the metal guard hook will make it inconvenient to wind the wire harness. The hook grooves of the metal guard hook and the stator winding are all on the same plane, which facilitates connection and also facilitates clamping and welding operations on the same plane.

[0023] Because the first, second, and third conductive rings are each provided with an inwardly projecting inner protrusion and an outwardly projecting outer protrusion, the outer circumferences of the first, second, and third conductive rings are each provided with a number of positioning notches. The positioning notches on each conductive ring, along with the corresponding four winding hooks, are arranged at equal intervals. This inner and outer protrusions further restrict the position of the first, second, and third conductive rings within the ring body, ensuring that they do not shift and affect use. The positioning notches also facilitate stacking the three first, second, and third conductive rings, ensuring that only one metal hook is attached to each vertical row, and that the positioning notches and metal hooks are precisely aligned, significantly accelerating assembly and ensuring accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The invention is further described below with reference to the accompanying drawings and examples.

[0025] Figure 1 is a three-dimensional diagram of the motor according to an embodiment of the present invention with the rear cover hidden;

[0026] Figure 2 It is a three-dimensional picture of the heat dissipation base;

[0027] Figure 3 It is a cutaway perspective view of the heat sink base and phase ring;

[0028] Figure 4 is a three-dimensional diagram of the conductive connection base, the first conductive sheet, the second conductive sheet, and the third conductive sheet;

[0029] Figure 5 It is a front perspective view of the sealing plate;

[0030] Figure 6 It is a perspective view of the back side of the sealing plate;

[0031] Figure 7 It is a three-dimensional view of the back of the sealing plate;

[0032] Figure 8 It is a stereogram of the phase ring;

[0033] Figure 9 It is a three-dimensional picture of the phase ring after the phase ring body is hidden;

[0034] Figure 10 This is a schematic diagram of the installation of the phase ring and stator assembly;

[0035] In the accompanying drawings: 1. Heat dissipation base; 101. Connector mounting area; 102. Mounting groove; 103. Through hole; 104. Surrounding edge; 105. Peripheral sealing groove; 106. Positioning protrusion; 2. PCBA board; 3. Conductive connector; 301. Enclosure; 302. Positioning hole; 303. Sealing ring mounting groove; 304. Pressing portion; 305. Connecting ear; 4. Third conductive sheet; 5. Second conductive sheet; 6. First conductive sheet; 7. Hook; 8. Sealing plate; 801. Sealing nest; 802. Inner ring sealing ridge; 803. Outer ring sealing ridge; 9. Sealing pressure plate; 901. Through hole; 902. Groove; 10. Phase ring; 1001. Phase ring body; 1002. First conductive ring; 1003. Second conductive ring; 1004. Third conductive ring; 1005. First conductive link; 1006. Second conductive link; 1007. Third conductive link; 1008. First winding hook; 1009. Second winding hook; 1010. Third winding hook; 1011. Inner protrusion; 1012. Outer protrusion; 1013. Positioning notch; 11. Back cover 11; 12. Stator assembly; 1201. Stator winding: 1202. Stator core. DETAILED DESCRIPTION

[0036] The present invention is further described in detail below through specific examples.

[0037] like Figures 1 to 10 The figure shows a connection structure between a motor PCBA board 2 and a stator assembly 12. The motor includes a heat sink base 1, with a central axis fixed to the front of the heat sink base 1. The side where the stator assembly 12 is mounted is defined as the front side, and the opposite side is defined as the back side. The front side of the heat sink base 1 fixes the stator assembly 12, which includes a stator core 1202 and stator windings 1201. The rotor assembly is mounted on the central axis. The PCBA board 2 and the back cover 11 are mounted on the back of the heat sink base 1. The back cover 11 and the heat sink base 1 are sealed with glue.

[0038] like Figure 1 and Figure 4 As shown, the connection structure includes a phase ring 10 and a conductive connection base 3. The heat dissipation base 1 of the motor is provided with a connection base mounting area 101. The conductive connection base 3 is made of an insulating material. The conductive connection base 3 is fixed in the connection base mounting area 101 and its bottom is sealed with the heat dissipation base 1. The conductive connection base 3 is provided with an enclosure 301, and the end surface of the enclosure 301 is provided with a sealing ring mounting groove 303. A positioning structure is provided between the connection base mounting area 101 of the heat dissipation base 1 and the conductive connection base 3 to facilitate the positioning of the conductive connection base 3. The positioning structure includes a positioning groove or positioning hole 302 provided on the conductive connection base 3. Correspondingly, the connection base mounting area 101 of the heat dissipation base 1 is provided with a positioning protrusion 106 corresponding to the positioning groove or positioning hole 302. The conductive connection base 3 is provided with a connection ear 305, and a screw is installed on the connection ear 305, through which a detachable fixation with the heat dissipation base 1 is achieved. The conductive connection base 3 is embedded with a first conductive sheet 6, a second conductive sheet 5, and a third conductive sheet 4. One end of each of the first conductive sheet 6, the second conductive sheet 5, and the third conductive sheet 4 extends into the enclosure 301 and is provided with a hook 7. The other ends of the first conductive sheet 6, the second conductive sheet 5, and the third conductive sheet 4 are respectively soldered to the three phase electrical pins of the PCBA board 2. The heat dissipation base 1 is provided with a peripheral edge 104 that encloses the connection base mounting area 101. The connection base mounting area 101 is provided with a peripheral sealing groove 105 for mounting a sealing ring. This peripheral sealing groove 105 facilitates the application of glue or the installation of a sealing ring between the conductive connection base 3 and the sealing base.

[0039] The heat dissipation base 1 is provided with three through holes 103 in the surrounding cavity 301. The phase ring 10 is fixed to the stator core 1202 of the stator assembly 12. The phase ring 10 includes a phase ring body 1001 made of insulating material. The phase ring body 1001 is embedded with a first conductive insert, a second conductive insert and a third conductive insert that are independent of each other. The first conductive insert is provided with a first conductive connecting rod 1005 and a first winding hook 1008. The second conductive insert is provided with a second conductive connecting rod 1006 and a second winding hook 1009. The third conductive insert is provided with a third conductive connecting rod 1007 and a third winding hook 1008. The winding hook 1010, the first conductive link 1005, the second conductive link 1006 and the third conductive link 1007 respectively pass through the through hole 103, the first winding hook 1008, the second winding hook 1009 and the third winding hook 1010 are used to connect with the wiring harness of the three stator windings 1201 of the stator assembly 12, and a hole sealing structure for sealing the through hole 103 is installed in the enclosure 301. The hooks 7 on the first conductive sheet 6, the second conductive sheet 5 and the third conductive sheet 4 are correspondingly mounted on the first conductive link 1005, the second conductive link 1006 and the third conductive link 1007 and welded to fix them.

[0040] The above structure can be used to more conveniently perform assembly and connection, wherein the phase ring 10 is first fixed in the inner hole of the stator core 1202, and the first conductive link 1005, the second conductive link 1006 and the third conductive link 1007 all pass through the through hole 103, and then the conductive connecting seat 3 is placed in the connecting seat installation area 101. After positioning using the positioning structure, the corresponding hook 7 will be sleeved on the tail of the corresponding conductive link, and the other ends of the first conductive sheet 6, the second conductive sheet 5 and the third conductive sheet 4 are also respectively sleeved on the three phase electrical pins of the PCBA board 2. Compared with the background technology, the assembly is very convenient and accurate, and the through hole 103 is surrounded by a frame, which has better sealing.

[0041] like Figure 2 and Figure 3As shown, the connection seat installation area 101 is provided with a mounting groove 102, the enclosure 301 corresponds to the mounting groove 102, the through hole 103 is in the mounting groove 102, and the hole sealing structure is provided in the mounting groove 102. The hole sealing structure includes a sealing plate 8 provided in the mounting groove 102, and the sealing plate 8 is provided with three sealing nests 801 that are embedded in the through holes 103 in a one-to-one correspondence. The plate surface of the sealing plate 8 is provided with a sealing ridge that seals with the bottom of the mounting groove 102. A sealing pressure plate 9 is provided above the sealing plate 8. A pressing portion 304 that presses the sealing pressure plate 9 and the sealing plate 8 is provided on the enclosure 301. A through hole 901 is provided on the sealing pressure plate 9 for facilitating the passage of the sealing nest 801. The first conductive connecting rod 1005, the second conductive connecting rod 1006 and the third conductive connecting rod 1007 all pass through the sealing nest 801 and seal with the sealing nest 801. Wherein, as Figure 3 As shown, Figure 3 The figure is a sectional perspective view of the heat dissipation base 1 and the conductive connection base 3, and the gray surface in the figure is its cross section. Figure 5 and Figure 6 As shown in the figures, these two figures disclose the structure of the sealing plate 8, wherein the sealing ridges on the front of the sealing plate 8 include outer ring sealing ridges 803 and inner ring sealing ridges 802. The outer ring sealing ridges 803 are arranged on the outer periphery of the sealing plate 8, and the number of the inner ring sealing ridges 802 is at least three and each surrounds a corresponding sealing nest 801. In this way, the gap between the sealing nest 801 and the through hole 103 will be within the inner ring sealing ridge 802, thereby further forming at least one sealing area and improving the sealing effect. Figure 7 As shown, Figure 7 The structure of the sealing pressure plate 9 is disclosed. A plurality of grooves 902 are provided on the back of the sealing pressure plate 9. The through holes 901 are all provided in the grooves 902 in a one-to-one correspondence. In this way, a certain degree of protection can be formed by utilizing the grooves 902.

[0042] like Figures 8 to 10As shown, the first conductive insert includes a first conductive ring 1002, the number of the first winding hooks 1008 is four and the circumference is evenly distributed on the outer circumference of the first conductive ring 1002, and the first conductive connecting rod 1005 is also connected to the outer circumference of the first conductive ring 1002; the second conductive insert includes a second conductive ring 1003, the number of the second winding hooks 1009 is four and the circumference is evenly distributed on the outer circumference of the second conductive ring 1003, and the second conductive connecting rod 1006 is also connected to the second conductive ring 10 03; the third conductive insert includes a third conductive ring 1004, four third winding hooks 1010 are evenly distributed around the circumference of the third conductive ring 1004, and the third conductive connecting rod 1007 is also connected to the circumference of the third conductive ring 1004; the first conductive ring 1002, the second conductive ring 1003, and the third conductive ring 1004 are concentrically arranged and overlapped, and all the first winding hooks 1008, the second winding hooks 1009, and the third winding hooks 1010 are evenly distributed around the circumference. The hook grooves of all the first winding hooks 1008, the second winding hooks 1009, and the third winding hooks 1010 are on the same plane. The first conductive ring 1002, the second conductive ring 1003 and the third conductive ring 1004 are each provided with an inner protrusion 1011 protruding inward and an outer protrusion 1012 protruding outward. The outer periphery of the first conductive ring 1002, the second conductive ring 1003 and the third conductive ring 1004 are each provided with a plurality of positioning notches 1013. The positioning notches 1013 on each conductive ring are arranged at equal intervals together with the corresponding four winding hooks. In the actual molding process of the phase ring 10, the three conductive rings are concentrically stacked and spaced apart, and the positioning notch 1013 is used to facilitate positioning, so that the first winding hook 1008, the second winding hook 1009 and the third winding hook 1010 are arranged at equal intervals around the circumference. After the phase ring body 1001 is formed by injection molding, the first conductive insert, the second conductive insert and the third conductive insert are all embedded in the phase ring body 1001. The molding is very convenient, and the assembly after molding is also very simple. A number of plugs are provided on the phase ring body 1001, which are used to be inserted into the jacks on the inner wall of the stator core 1202 to complete the fixation of the phase ring 10. Then, the wiring harness of the stator winding 1201 and the winding connection of the three winding hooks can be facilitated. Compared with the existing technology, the entire assembly process is more efficient and has better sealing performance.

[0043] The above-described embodiments are merely descriptions of preferred implementations of the present invention and are not intended to limit the scope of the present invention. Various modifications and alterations to the technical solutions of the present invention without departing from the spirit of the present invention shall fall within the scope of protection defined by the claims of the present invention.

Claims

1. A connection structure between a motor PCBA board and a stator assembly, characterized by: The connection structure includes a phase ring and a conductive connection seat, a connection seat installation area is provided on the heat dissipation base of the motor, the conductive connection seat is fixed in the connection seat installation area and the bottom is sealed with the heat dissipation base, a cavity is provided on the conductive connection seat, and a sealing ring installation groove is provided on the end face of the cavity, and three through holes are provided in the cavity on the heat dissipation base, the phase ring is fixed on the stator core of the stator assembly, the phase ring includes a phase ring body made of insulating material, and the phase ring body is embedded with a first conductive insert, a second conductive insert and a third conductive insert that are independent of each other, the first conductive insert is provided with a first conductive connecting rod and a first winding hook, the second conductive insert is provided with a second conductive connecting rod and a second winding hook, and the third conductive insert is provided with a third conductive connecting rod and a third winding hook, the first conductive link, the second conductive link and the third conductive link respectively pass through the through hole, the first winding hook, the second winding hook and the third winding hook are used to connect with the wiring harness of the three stator windings of the stator assembly, and a hole sealing structure for sealing the through hole is installed in the cavity, the first conductive sheet, the second conductive sheet and the third conductive sheet are embedded in the conductive connection seat, one end of the first conductive sheet, the second conductive sheet and the third conductive sheet are all extended into the cavity and are all provided with a hook, the hooks on the first conductive sheet, the second conductive sheet and the third conductive sheet are correspondingly sleeved on the first conductive link, the second conductive link and the third conductive link and welded and fixed, and the other ends of the first conductive sheet, the second conductive sheet and the third conductive sheet are respectively welded to the three phase electrical pins of the PCBA board.

2. The connection structure between a motor PCBA board and a stator assembly according to claim 1, characterized in that: The connection seat installation area is provided with an installation groove, the enclosed cavity corresponds to the installation groove, the through hole is located in the installation groove, and the hole sealing structure is provided in the installation groove.

3. The connection structure between a motor PCBA board and a stator assembly according to claim 2, characterized in that: The hole sealing structure includes a sealing plate arranged in the mounting groove, and three sealing nests are provided on the sealing plate, which are embedded in the through hole in a one-to-one correspondence. A sealing ridge is provided on the plate surface of the sealing plate and is sealed with the bottom of the mounting groove. A sealing pressure plate is provided above the sealing plate, and a pressing portion for pressing the sealing pressure plate and the sealing plate is provided on the surrounding cavity. A through hole is provided on the sealing pressure plate for facilitating the sealing nest to pass through. The first conductive connecting rod, the second conductive connecting rod and the third conductive connecting rod all pass through the sealing nest and are sealed with the sealing nest.

4. The connection structure between a motor PCBA board and a stator assembly according to claim 3, characterized in that: The sealing ridges include outer ring sealing ridges and inner ring sealing ridges. The outer ring sealing ridges are arranged on the outer periphery of the sealing plate. The number of the inner ring sealing ridges is at least three and they respectively surround corresponding sealing nests.

5. The connection structure between a motor PCBA board and a stator assembly according to claim 1, characterized in that: A positioning structure for facilitating the positioning of the conductive connecting seat is provided between the connecting seat installation area of ​​the heat dissipation base and the conductive connecting seat.

6. The connection structure between a motor PCBA board and a stator assembly according to claim 5, characterized in that: The positioning structure includes a positioning groove or a positioning hole provided on the conductive connecting seat. Correspondingly, a positioning protrusion corresponding to the positioning groove or the positioning hole is provided on the connecting seat installation area of ​​the heat dissipation base.

7. The connection structure between a motor PCBA board and a stator assembly according to claim 6, characterized in that: The heat dissipation base is provided with a surrounding edge, which encloses the connection seat installation area. The connection seat installation area is provided with a circle of peripheral sealing grooves for installing a sealing ring.

8. The connection structure between a motor PCBA board and a stator assembly according to any one of claims 1 to 7, characterized in that: The first conductive insert includes a first conductive ring, the number of the first winding hooks is four and they are evenly distributed on the outer circumference of the first conductive ring, and the first conductive connecting rod is also connected to the outer circumference of the first conductive ring; the second conductive insert includes a second conductive ring, the number of the second winding hooks is four and they are evenly distributed on the outer circumference of the second conductive ring, and the second conductive connecting rod is also connected to the outer circumference of the second conductive ring; the third conductive insert includes a third conductive ring, the number of the third winding hooks is four and they are evenly distributed on the outer circumference of the third conductive ring, and the third conductive connecting rod is also connected to the outer circumference of the third conductive ring; the first conductive ring, the second conductive ring and the third conductive ring are concentrically arranged and overlapped with each other, and all the first winding hooks, the second winding hooks and the third winding hooks are evenly distributed on the circumference.

9. The connection structure between a motor PCBA board and a stator assembly according to claim 8, characterized in that: All the hook grooves on the circumferences of the first wire winding hook, the second wire winding hook and the third wire winding hook are located on the same plane.

10. The connection structure between a motor PCBA board and a stator assembly according to claim 9, characterized in that: The first conductive ring, the second conductive ring and the third conductive ring are each provided with an inner protrusion protruding inward and an outer protrusion protruding outward. The outer periphery of the first conductive ring, the second conductive ring and the third conductive ring are each provided with a plurality of positioning notches. The positioning notches on each conductive ring are arranged at equal intervals together with the corresponding four winding hooks.

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