Brushless electronic water pump and brushless electronic water pump stator convergence bridge

Abstract

The utility model relates to the technical field of electronic water pump manufacturing, in particular to a brushless electronic water pump and a brushless electronic water pump stator convergence bridge. Comprising a PCB body, and a first metal layer and a second metal layer are overlapped on the PCB body; a group of winding connecting end holes are formed in the PCB body in a circumferential array manner, the winding connecting end holes sequentially comprise three groups of end holes which are sequentially arranged in the circumferential direction, the three groups of end holes are respectively first phase end holes, second phase end holes and third phase end holes, the number of the end holes in each group is four, and the end holes are uniformly distributed in the circumferential direction; the twelve end holes are evenly distributed in the circumferential direction of the circumference. The PCB body is provided with an electrical connection path, and the electrical connection path comprises a first path, a second path and a third path; a double-layer PCB (printed circuit board) is adopted to form a confluence bridge PCB, and a stator winding and the brushless electronic water pump stator confluence bridge are connected together in a press fitting manner by inserting a fisheye inserting needle into an end hole. The production efficiency is improved and the production cost is saved.

Description

Technical Field

[0001] The utility model relates to the technical field of electronic water pump manufacturing, in particular to a brushless electronic water pump and a brushless electronic water pump stator bus bridge. Background Art

[0002] The stator busbars of brushless electronic water pumps in the existing market are mainly produced by injection molding copper bars. The copper bars of the busbars are molded in plastic using an injection molding machine and an injection mold. This method requires the development of an additional set of injection molds, and has a long production cycle, slow production efficiency, and high production costs.

[0003] The Chinese invention patent application document with publication number CN 116683684 A discloses an automotive electronic water pump, wherein the busbar is assembled by connecting a busbar bracket to three metal terminals. The busbar bracket needs to be manufactured separately by injection molding, which also cannot overcome the disadvantage that the existing busbar needs to develop an injection mold. Utility Model Content

[0004] In order to overcome the deficiencies of the above-mentioned prior art, the utility model provides a brushless electronic water pump stator bus bridge, which saves the cost of injection molds and the production process and time of injection molding and overmolding, improves production efficiency, and saves production costs.

[0005] In order to achieve the above purpose, the utility model is implemented through the following technical solutions:

[0006] A brushless electronic water pump stator bus bridge comprises a PCB board body, on which a first metal layer and a second metal layer are overlapped;

[0007] A group of winding connection end holes are arranged in a circumferential array on the PCB body, and the winding connection end holes include three groups of end holes arranged in sequence along the circumferential direction, and the three groups of end holes are respectively: a first phase end hole, a second phase end hole and a third phase end hole, and the number of end holes in each group is 4, which are evenly distributed in the circumferential direction; 12 end holes are evenly distributed in the circumferential direction;

[0008] The PCB body is provided with an electrical connection path, and the electrical connection path includes a first path, a second path and a third path;

[0009] The first path is arranged on the first metal layer, and includes a first annular path, the first annular path is located in the first metal layer, the first annular path radially extends to form a group of first extensions, the first phase end hole is arranged on the first extension, and the first path is provided with a pair of first drive circuit connection holes;

[0010] The second passage includes a second annular passage, the second annular passage is located in the second metal layer, the second annular passage radially extends to form three second extensions, the second passage also includes a drive connection portion located on the first metal layer, the drive connection portion is electrically connected to the second annular passage through a via, the four third phase end holes are respectively arranged on a group of the second extensions and the drive connection portion, and the drive connection portion is provided with a second drive circuit connection hole;

[0011] The third path includes a first arc path and a second arc path, the number of the first arc path and the second arc path is 3 respectively, the first arc path and the second arc path are respectively arranged on the first metal layer and the second metal layer, a group of the first arc path and the second arc path are circumferentially spaced, each of the first arc path and the second arc path is respectively arranged in the interval area of ​​a pair of first extension parts and a pair of second extension parts adjacent to each other in the circumferential direction, the first arc path and the second arc path overlap each other at the head and tail ends on the projection plane to form a C shape as a whole, the overlapping area of ​​the first arc path and the second arc path on the projection plane is electrically connected through a via, a group of the second phase end holes are arranged on the first arc path and the second arc path, and one of the first arc paths is provided with a pair of third drive circuit connection holes.

[0012] Based on the above structure, the principle of the stator bus bridge of a brushless electronic water pump is as follows: the first phase end hole, the second phase end hole and the third phase end hole correspond to the U, V and W three-phase windings of the brushless electronic water pump respectively, and the 12 end holes are arranged in sequence with serial numbers 1-12. The first phase end hole corresponds to serial numbers 1, 4, 7 and 10, which are the U end of the brushless electronic water pump; the second phase end hole corresponds to serial numbers 2, 5, 8 and 11, which are the V end of the brushless electronic water pump; the third phase end hole corresponds to serial numbers 3, 6, 9 and 12, which are the W end of the brushless electronic water pump. The first drive circuit connection hole, the second drive circuit connection hole and the third drive circuit connection hole are electrically connected to the drive circuit board of the brushless electronic water pump, that is, the first drive circuit connection hole, the third drive circuit connection hole and the second drive circuit connection hole correspond to the U, V and W ends of the brushless electronic water pump respectively. The first passage connects the first drive circuit connection hole and a group of first phase end holes, corresponding to the U end of the brushless electronic water pump; the third passage connects the third drive circuit connection hole and a group of second phase end holes, corresponding to the V end of the brushless electronic water pump; the second passage connects the second drive circuit connection hole and a group of third phase end holes, corresponding to the W end of the brushless electronic water pump. Therefore, the stator busbar of a brushless electronic water pump described in the present application adopts a double-layer PCB board to form a busbar PCB, and the stator winding of the brushless electronic water pump can be pressed and connected with the stator busbar of a brushless electronic water pump described in the present application by piercing the end hole with a fisheye pin. Therefore, compared with the existing water pump busbar, the injection mold cost and the production process and time of injection molding and rubber coating are saved, the production efficiency is improved, and the production cost is saved. The stator busbar of a brushless electronic water pump described in the present application also has the advantages of good compactness and occupies a small installation space.

[0013] Further, in the stator bus bridge of a brushless electronic water pump described in the present application, the PCB body is in a circular ring shape as a whole. As a preferred embodiment of the present application, the stator winding of the brushless electronic water pump is distributed in a circle, and the PCB body is in a circular ring shape as a whole, which is adapted to the shape of the stator winding distribution.

[0014] Furthermore, in the brushless electronic water pump stator bridge described in the present application, the radial dimensions and widths of the first annular passage and the second annular passage are consistent as a whole. As a preferred solution of the present application, the first annular passage and the second annular passage are arranged to overlap as a whole, which can improve the space utilization of the PCB board.

[0015] Furthermore, in the brushless electronic water pump stator bus bridge described in the present application, the first extension portion and the second extension portion are arranged radially outside the first annular passage and the second annular passage.

[0016] A brushless electronic water pump, characterized in that it comprises the above-mentioned brushless electronic water pump stator bus bridge, and further comprises:

[0017] A driving circuit board, wherein the driving circuit board is electrically connected to the first driving circuit connection hole, the second driving circuit connection hole, and the third driving circuit connection hole;

[0018] The motor stator, the corresponding windings in the motor stator are electrically connected to the end holes through pins.

[0019] The working principle of the brushless electronic water pump is to control the conversion of the electromagnetic poles between the windings of the motor stator through the driving circuit board. The driving circuit board is used to control the phase sequence of the output current, and the current between the windings is commutated, thereby changing the direction of the magnetic poles of the stator winding. The electromagnetic force generated when the winding is energized is used to drive the rotor to rotate, thereby driving the impeller of the electronic water pump, causing the impeller to rotate rapidly to complete the function of pumping water.

[0020] When the driving circuit board outputs the three-phase current of the driving motor stator to the bus bridge through the fisheye pins, the bus bridge distributes the driving current to the corresponding windings according to the phase sequence, so that the corresponding windings in the motor stator generate electromagnetic thrust for operation.

[0021] When the current on the driving circuit board is output to the U and V terminals on the bus bridge, the 1, 4, 7, and 10 terminals on the bus bridge are powered. At this time, the 1, 4, 7, and 10 groups of windings on the corresponding motor stators generate electromagnetic thrust, and the rotor makes a corresponding 1 / 3 rotation motion.

[0022] When the current on the drive board is output to the V and W terminals on the bus bridge, the 2, 5, 8, and 11 terminals on the bus bridge are powered, and the 2, 5, 8, and 11 groups of windings on the corresponding motor stators generate electromagnetic thrust, and the rotor then makes a corresponding 1 / 3 rotation motion.

[0023] When the current on the driving circuit board is output to the W and U terminals on the bus bridge, the 3, 6, 9, and 12 terminals on the bus bridge are powered, and the 3, 6, 9, and 12 windings on the corresponding stators generate electromagnetic thrusts, and the rotor then performs a corresponding 1 / 3 rotation. The driving circuit board reciprocates in this way, outputs the driving current in phase change, and transmits it through the bus bridge to the corresponding windings of the motor stator, generating magnetic force, thereby driving the rotor to rotate. In this embodiment, the driving circuit board and the first driving circuit connection hole, the second driving circuit connection hole, and the third driving circuit connection hole are welded by welding pins.

[0024] It can be seen from the above technical solution that the utility model has the following beneficial effects:

[0025] The utility model provides a brushless electronic water pump and a brushless electronic water pump stator bridge. The brushless electronic water pump stator bridge adopts a double-layer PCB board to form a bridge PCB. The stator winding of the brushless electronic water pump can be pressed and connected with the brushless electronic water pump stator bridge described in the present application by inserting a fisheye pin into the end hole. Therefore, compared with the existing water pump bridge, the injection mold cost and the production process and time of injection molding and rubber coating are saved, the production efficiency is improved, and the production cost is saved. The brushless electronic water pump stator bridge described in the present application also has the advantage of good compactness and occupies a small installation space. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 A schematic diagram of a brushless electronic water pump stator bus bridge corresponding to a first metal layer according to an embodiment of the present application;

[0027] Figure 2 A schematic diagram of a brushless electronic water pump stator bus bridge corresponding to a second metal layer according to an embodiment of the present application;

[0028] Figure 3 This is a schematic structural diagram of a brushless electronic water pump according to an embodiment of the present application;

[0029] Figure 4 This is a schematic diagram of the connection between the drive circuit board, the bus bridge and the motor stator described in the embodiment of the present application.

[0030] In the figure: 1-PCB board; 11-first metal layer; 12-second metal layer;

[0031] 21-first phase end hole; 22-second phase end hole; 23-third phase end hole;

[0032] 31-first passage; 311-first annular passage; 312-first extension; 32-second passage; 321-second annular passage; 322-second extension; 323-driving connection; 33-third passage; 331-first arc passage; 332-second arc passage;

[0033] 4-motor stator; 41-first drive circuit connection hole; 42-second drive circuit connection hole; 43-third drive circuit connection hole;

[0034] 5-Drive circuit board;

[0035] 6-Fisheye pin. DETAILED DESCRIPTION Example

[0036] Combination Figure 1 and 2A brushless electronic water pump stator bus bridge is shown, comprising a PCB body 1, on which a first metal layer 11 and a second metal layer 12 are overlapped; the first metal layer 11 and the second metal layer 12 are electrically connected through vias.

[0037] A group of winding connection end holes are arranged in a circumferential array on the PCB body 1, and the winding connection end holes include three groups of end holes arranged in sequence along the circumferential direction. The three groups of end holes are respectively: a first phase end hole 21, a second phase end hole 22 and a third phase end hole 23. The number of end holes in each group is 4, which are evenly distributed in the circumferential direction; 12 end holes are evenly distributed in the circumferential direction;

[0038] The PCB body 1 is provided with an electrical connection path, and the electrical connection path includes a first path 31, a second path 32 and a third path 33;

[0039] The first passage 31 is disposed on the first metal layer 11, and includes a first annular passage 311. The first annular passage 311 is located on the first metal layer 11. The first annular passage 311 radially extends to form a group of first extensions 312. The first phase end hole 21 is disposed on the first extension 312. A pair of first drive circuit connection holes 41 are provided on the first passage 31.

[0040] The second passage 32 includes a second annular passage 321, the second annular passage 321 is located on the second metal layer 12, the second annular passage 321 radially extends to form three second extensions 322, the second passage 32 also includes a drive connection portion 323 located on the first metal layer 11, the drive connection portion 323 and the second annular passage 321 are electrically connected through a via, the four third phase end holes 23 are respectively arranged on a group of second extensions 322 and the drive connection portion 323, and the drive connection portion 323 is provided with a second drive circuit connection hole 42;

[0041] The third passage 33 includes a first arc passage 331 and a second arc passage 332, the number of the first arc passage 331 and the second arc passage 332 is 3, the first arc passage 331 and the second arc passage 332 are respectively arranged on the first metal layer 11 and the second metal layer 12, a group of the first arc passage 331 and the second arc passage 332 are arranged at intervals in the circumferential direction, each of the first arc passage 331 and the second arc passage 332 is respectively arranged in the interval area of ​​a pair of circumferentially adjacent first extension parts 312 and a pair of second extension parts 322, the first arc passage 331 and the second arc passage 332 overlap each other at the head and tail on the projection plane to form a C shape as a whole, the overlapping area of ​​the first arc passage 331 and the second arc passage 332 on the projection plane is electrically connected through a via, a group of the second phase end holes 22 are arranged on the first arc passage 331 and the second arc passage 332, and one of the first arc passages 331 is provided with a pair of third drive circuit connection holes 43.

[0042] Based on the above structure, the principle of the stator bus bridge of a brushless electronic water pump is as follows: the first phase end hole 21, the second phase end hole 22 and the third phase end hole 23 correspond to the U, V and W three-phase windings of the brushless electronic water pump respectively, and the 12 end holes are arranged in sequence with serial numbers 1-12. The first phase end hole 21 corresponds to serial numbers 1, 4, 7 and 10, which are the U end of the brushless electronic water pump; the second phase end hole 22 corresponds to serial numbers 2, 5, 8 and 11, which are the V end of the brushless electronic water pump; the third phase end hole 23 corresponds to serial numbers 3, 6, 9 and 12, which are the W end of the brushless electronic water pump. The first drive circuit connection hole 41, the second drive circuit connection hole 42 and the third drive circuit connection hole 43 are electrically connected to the drive circuit board 5 of the brushless electronic water pump, that is, the first drive circuit connection hole 41, the third drive circuit connection hole 43 and the second drive circuit connection hole 42 correspond to the U, V and W ends of the brushless electronic water pump respectively. The first passage 31 is connected to the first drive circuit connection hole 41 and a group of first phase end holes 21, corresponding to the U end of the brushless electronic water pump; the third passage 33 is connected to the third drive circuit connection hole 43 and a group of second phase end holes 22, corresponding to the V end of the brushless electronic water pump; the second passage 32 is connected to the second drive circuit connection hole 42 and a group of third phase end holes 23, corresponding to the W end of the brushless electronic water pump. Therefore, the stator bus bridge of a brushless electronic water pump described in the present application adopts a double-layer PCB board to form a bus bridge PCB, and the stator winding of the brushless electronic water pump can be pressed and connected with the stator bus bridge of a brushless electronic water pump described in the present application by inserting a fisheye pin into the end hole. Therefore, compared with the existing water pump bus bridge, the injection mold cost and the production process and time of injection molding and rubber coating are saved, the production efficiency is improved, and the production cost is saved. The stator bus bridge of a brushless electronic water pump described in the present application also has the advantages of good compactness and occupies a small installation space. Specifically, the first drive circuit connection hole 41 , the third drive circuit connection hole 43 , and the second drive circuit connection hole 42 are located on one side of the first metal layer 11 and are arranged vertically.

[0043] In this embodiment, the PCB body 1 is in a circular ring shape as a whole. The stator winding of the brushless electronic water pump is distributed in a circumference, and the PCB body 1 is in a circular ring shape as a whole, which is adapted to the shape of the stator winding distribution.

[0044] In this embodiment, the radial dimensions and widths of the first annular passage 311 and the second annular passage 321 are consistent as a whole, that is, the first annular passage 311 and the second annular passage 321 are arranged to overlap as a whole, which can improve the space utilization of the PCB body 1 .

[0045] In this embodiment, the first extension portion 312 and the second extension portion 322 are arranged radially outside the first annular passage 311 and the second annular passage 321. Correspondingly, the first arc passage 331 and the second arc passage 332 are arranged radially outside the first annular passage 311 and the second annular passage 321. Improve space utilization.

[0046] Example 2

[0047] Combination Figure 3 and 4 A brushless electronic water pump shown includes a brushless electronic water pump stator bus bridge as described in Example 1, and further includes:

[0048] A driving circuit board 5, wherein the driving circuit board 5 is electrically connected to the first driving circuit connection hole 41, the second driving circuit connection hole 42, and the third driving circuit connection hole 43;

[0049] The motor stator 4, the corresponding windings in the motor stator 4 are electrically connected to the end holes through pins.

[0050] Its working principle is: mainly through the driving circuit board 5 to control the conversion of the electromagnetic poles between the windings of the motor stator 4. The driving circuit board 5 is used to control the phase sequence of the output current, and the current between the windings is commutated, thereby changing the direction of the magnetic poles of the stator winding. The electromagnetic force generated when the winding is energized is used to drive the rotor to rotate, thereby driving the impeller of the electronic water pump, so that the impeller rotates rapidly to complete the function of pumping water.

[0051] When the driving circuit board 5 outputs the three-phase current of the driving motor stator 4 to the bus bridge through the fisheye pin 6, the bus bridge will distribute the driving current to the corresponding windings according to the phase sequence, so that the corresponding windings in the motor stator 4 generate electromagnetic thrust for operation.

[0052] When the current on the driving circuit board 5 is output to the U and V terminals on the bus bridge, the 1, 4, 7, and 10 terminals on the bus bridge are powered. At this time, the 1, 4, 7, and 10 groups of windings on the corresponding motor stator 4 generate electromagnetic thrust, and the rotor makes a corresponding 1 / 3 rotation motion.

[0053] When the current on the drive board is output to the V and W terminals on the bus bridge, the 2, 5, 8, and 11 terminals on the bus bridge are powered, and the 2, 5, 8, and 11 winding groups on the corresponding motor stator 4 generate electromagnetic thrust, and the rotor then makes a corresponding 1 / 3 rotation motion.

[0054] When the current on the driving circuit board 5 is output to the W and U terminals on the bus bridge, the 3, 6, 9, and 12 terminals on the bus bridge are powered, and the 3, 6, 9, and 12 winding groups on the corresponding stators generate electromagnetic thrust, and the rotor then makes a corresponding 1 / 3 rotation motion.

[0055] The driving circuit board 5 reciprocates in this way, outputs the driving current in phase switching, and transmits it through the bus bridge to the corresponding windings of the motor stator 4, thereby generating magnetic force, thereby driving the rotor to rotate. In this embodiment, the driving circuit board 5 and the first driving circuit connection hole 41, the second driving circuit connection hole 42, and the third driving circuit connection hole 43 are welded by welding pins.

[0056] The technical principle of the present invention is described above in combination with specific embodiments. These descriptions are only for explaining the principle of the present invention and cannot be interpreted as limiting the protection scope of the present invention in any way. Based on the explanation here, technicians in this field can think of other specific implementation methods of the present invention without creative work, and these methods will fall within the protection scope of the present invention.

Claims

1. A brushless electronic water pump stator bus bridge, characterized in that: It comprises a PCB body (1), wherein a first metal layer (11) and a second metal layer (12) are provided on the PCB body (1); A group of winding connection end holes are arranged in a circumferential array on the PCB body (1), and the winding connection end holes include three groups of end holes arranged in sequence along the circumferential direction, the three groups of end holes are respectively: a first phase end hole (21), a second phase end hole (22) and a third phase end hole (23), the number of end holes in each group is 4, and they are evenly distributed in the circumferential direction; 12 of the end holes are evenly distributed in the circumferential direction; The PCB body (1) is provided with an electrical connection path, the electrical connection path comprising a first path (31), a second path (32) and a third path (33); The first passage (31) is arranged on the first metal layer (11), and comprises a first annular passage (311); the first annular passage (311) is located on the first metal layer (11); the first annular passage (311) radially extends to form a group of first extension portions (312); the first phase end hole (21) is arranged on the first extension portion (312); and a pair of first drive circuit connection holes (41) are provided on the first passage (31); The second passage (32) comprises a second annular passage (321), the second annular passage (321) is located on the second metal layer (12), the second annular passage (321) radially extends to form three second extension parts (322), the second passage (32) further comprises a drive connection part (323) located on the first metal layer (11), the drive connection part (323) and the second annular passage (321) are electrically connected through a via, the four third phase end holes (23) are respectively arranged on a group of second extension parts (322) and the drive connection part (323), and the drive connection part (323) is provided with a second drive circuit connection hole (42); The third passage (33) comprises a first arc passage (331) and a second arc passage (332), the number of the first arc passage (331) and the second arc passage (332) being three respectively, the first arc passage (331) and the second arc passage (332) being arranged on the first metal layer (11) and the second metal layer (12) respectively, a group of the first arc passage (331) and the second arc passage (332) being arranged at intervals in the circumferential direction, each of the first arc passage (331) and the second arc passage (332) being arranged in a pair of circumferentially adjacent first arc passages (331) and second arc passages (332) respectively. In the interval area between an extension portion (312) and a pair of second extension portions (322), the first arc-shaped passage (331) and the second arc-shaped passage (332) overlap each other at the head and tail ends on the projection surface to form a C-shape as a whole; the first arc-shaped passage (331) and the second arc-shaped passage (332) are electrically connected in the overlapping area on the projection surface via a via hole; a group of second phase end holes (22) are arranged on the first arc-shaped passage (331) and the second arc-shaped passage (332); and a pair of third drive circuit connection holes (43) are arranged on one of the first arc-shaped passages (331).

2. The brushless electronic water pump stator bus bridge according to claim 1, characterized in that: The PCB body (1) is in the shape of a circular ring as a whole.

3. The brushless electronic water pump stator bus bridge according to claim 1, characterized in that: The radial dimensions and widths of the first annular passage (311) and the second annular passage (321) are generally consistent.

4. The brushless electronic water pump stator bus bridge according to claim 1, characterized in that: The first extension portion (312) and the second extension portion (322) are arranged radially outside the first annular passage (311) and the second annular passage (321).

5. A brushless electronic water pump, characterized in that: The brushless electronic water pump stator bus bridge according to any one of claims 1 to 4 further comprises: A driving circuit board (5), the driving circuit board (5) being electrically connected to the first driving circuit connection hole (41), the second driving circuit connection hole (42), and the third driving circuit connection hole (43); A motor stator (4), wherein corresponding windings in the motor stator (4) are electrically connected to the end holes via pins.

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