CN116054457B - Grounding structure of end cover and stator core, electronic water pump and new energy automobile - Google Patents
Grounding structure of end cover and stator core, electronic water pump and new energy automobile Download PDFInfo
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- CN116054457B CN116054457B CN202310000311.7A CN202310000311A CN116054457B CN 116054457 B CN116054457 B CN 116054457B CN 202310000311 A CN202310000311 A CN 202310000311A CN 116054457 B CN116054457 B CN 116054457B
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- end cover
- circuit board
- driving circuit
- elastic sheet
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 65
- 229910052751 metal Inorganic materials 0.000 claims abstract description 8
- 239000002184 metal Substances 0.000 claims abstract description 8
- 238000004804 winding Methods 0.000 claims description 6
- 238000004519 manufacturing process Methods 0.000 abstract description 13
- 239000012530 fluid Substances 0.000 description 5
- 229910000838 Al alloy Inorganic materials 0.000 description 4
- 230000007774 longterm Effects 0.000 description 4
- 229910000976 Electrical steel Inorganic materials 0.000 description 3
- 238000001816 cooling Methods 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical group [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 229910000881 Cu alloy Inorganic materials 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 2
- 239000000110 cooling liquid Substances 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 229920006351 engineering plastic Polymers 0.000 description 2
- 239000003292 glue Substances 0.000 description 2
- 229910002804 graphite Inorganic materials 0.000 description 2
- 239000010439 graphite Substances 0.000 description 2
- 238000003801 milling Methods 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 238000012938 design process Methods 0.000 description 1
- 239000012634 fragment Substances 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K3/00—Details of windings
- H02K3/46—Fastening of windings on the stator or rotor structure
- H02K3/50—Fastening of winding heads, equalising connectors, or connections thereto
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B17/00—Pumps characterised by combination with, or adaptation to, specific driving engines or motors
- F04B17/03—Pumps characterised by combination with, or adaptation to, specific driving engines or motors driven by electric motors
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
- F04B49/06—Control using electricity
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/27—Rotor cores with permanent magnets
- H02K1/2706—Inner rotors
- H02K1/272—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis
- H02K1/2726—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of a single magnet or two or more axially juxtaposed single magnets
- H02K1/2733—Annular magnets
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
- H02K11/0094—Structural association with other electrical or electronic devices
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
- H02K11/02—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection for suppression of electromagnetic interference
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
- H02K11/40—Structural association with grounding devices
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/14—Structural association with mechanical loads, e.g. with hand-held machine tools or fans
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K9/00—Arrangements for cooling or ventilating
- H02K9/19—Arrangements for cooling or ventilating for machines with closed casing and closed-circuit cooling using a liquid cooling medium, e.g. oil
- H02K9/193—Arrangements for cooling or ventilating for machines with closed casing and closed-circuit cooling using a liquid cooling medium, e.g. oil with provision for replenishing the cooling medium; with means for preventing leakage of the cooling medium
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K2213/00—Specific aspects, not otherwise provided for and not covered by codes H02K2201/00 - H02K2211/00
- H02K2213/03—Machines characterised by numerical values, ranges, mathematical expressions or similar information
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention discloses a grounding structure of an end cover and a stator core, an electronic water pump and a new energy automobile, wherein the electronic water pump comprises a driving circuit board, a stator assembly and an end cover made of metal; a grounding terminal is led out of a stator core of the stator assembly, and a female connection elastic sheet group is integrally arranged on the grounding terminal; the inner side of the end cover is integrally provided with a grounding column; the grounding terminal of the stator assembly is welded on the driving circuit board and is electrically communicated with the negative electrode and/or the grounding electrode of the driving circuit board through a printed circuit on the driving circuit board, and the grounding post on the end cover is contacted with the female elastic sheet group on the grounding terminal. According to the invention, reliable grounding of the end cover and the stator core can be realized simultaneously by only adding the female connection spring piece group on the grounding terminal and adding the grounding post on the end cover, the grounding structure of the end cover and the stator core can be effectively simplified, the requirements on the number of parts, the manufacturing precision and the assembly precision are low, and the cost of the grounding structure is effectively reduced.
Description
Technical Field
The invention relates to the technical field of electronic water pumps, in particular to a grounding structure of an end cover and a stator core, an electronic water pump and a new energy automobile.
Background
The electronic water pump comprises a stator assembly, a rotor assembly, an impeller, a driving circuit board carrying main control and power electronic devices and other series of precise parts, so that the electronic water pump has higher output efficiency and can realize precise flow control. The electronic water pump based on the structure is widely applied to automobiles, household appliances and industrial equipment, and particularly, a new energy automobile is generally provided with two or more electronic water pumps, the electronic water pumps are power sources of the whole cooling system of the new energy automobile, and power batteries, driving motors and the like of the new energy automobile all need to drive cooling liquid to be cooled circularly by means of the electronic water pumps.
The driving circuit board is a driving and controlling core of the electronic water pump and is mainly used for driving the stator assembly to generate a rotating magnetic field, the rotating magnetic field can magnetically couple and link the rotor assembly to rotate and drive the impeller to rotate, and a stator iron core of the stator assembly is made of silicon steel sheets; because the main control and the power electronic devices are carried on the driving circuit board, the heating value of the driving circuit board is larger, in order to improve the heat dissipation efficiency of the driving circuit board, an end cover of the electronic water pump is usually made of metal materials, and the driving circuit board is contacted with the end cover through heat conducting glue or a heat conducting sheet, so that the heat of the driving circuit board can be dissipated to the outside through the end cover; in summary, the mounting locations of the drive circuit board and the stator assembly and the end caps are relatively close.
Meanwhile, as the drive circuit board is provided with the main control and power electronic devices, the drive circuit board has higher requirements on EMC performance, and in order to ensure that the drive circuit board can reliably work, the electromagnetic interference of the drive circuit board during work is weakened as much as possible, so that the end cover and the stator core on the stator assembly are required to be grounded; in addition, the end cover and the stator core are grounded, so that the electromagnetic interference of the end cover to external radiation can be avoided from affecting the operation of power components such as a power battery and a driving motor of the new energy automobile.
Chinese patent publication No. CN209855982U, entitled "electric pump", discloses a typical end cap grounding structure that electrically connects circuit board 30 to housing 40 (i.e., end cap) via resilient connecting member 50; however, as a separate component, the connection member 50 not only complicates the assembly of the electronic water pump, but also is easily loosened in a vibration environment or in long-term use; meanwhile, the connection component 50 is necessarily in contact with the non-component arrangement surface of the circuit board 30, so that the circuit board 30 needs to print a layer of contact circuit with a large area on the non-component arrangement surface to complete the electrical connection with the connection component 50, and the design and manufacturing process of the circuit board 30 are complex.
The publication No. CN212583797U, entitled "electronic water pump and vehicle with the same", discloses another typical end cover grounding structure, which realizes the electrical connection of the stator core, the control board 2 and the end cover 3 through the grounding member 4 disposed on the stator core, however, the grounding member 4 is a precise hardware with more structural features, which not only has higher manufacturing and assembly precision requirements, but also increases the manufacturing and assembly precision requirements for at least three parts such as the stator core, the control board 2 and the end cover 3.
In summary, how to provide a grounding structure of an end cover and a stator core for an electronic water pump with low cost and easy assembly to improve EMC performance of the electronic water pump is a problem to be solved.
Disclosure of Invention
An object of the present invention is to provide a grounding structure of an end cap and a stator core, which realizes the grounding of the end cap and the stator core in a low-cost and easy-to-assemble structure.
Another object of the present invention is to provide an electronic water pump, in which the end cover and the stator core have a good grounding structure, so that the electronic water pump has good EMC performance.
It is still another object of the present invention to provide a new energy automobile having an electronic water pump with good EMC performance, low cost and easy assembly.
In order to achieve the above purpose, the present invention provides the following technical solutions: the grounding structure of the end cover and the stator core is applied to an electronic water pump, and the electronic water pump at least comprises a driving circuit board, a stator assembly and an end cover made of metal; a grounding terminal is led out of a stator core of the stator assembly, and a female connection elastic sheet group is integrally arranged on the grounding terminal; the inner side of the end cover is integrally provided with a grounding column; after the electronic water pump is assembled, the grounding terminal of the stator assembly is welded on the driving circuit board and is electrically communicated with the negative electrode and/or the grounding electrode of the driving circuit board through a printed circuit on the driving circuit board, and the grounding post on the end cover is in contact with the female elastic piece group on the grounding terminal.
In the above technical solution, after the electronic water pump is assembled, the female elastic piece group on the grounding terminal is located at one side of the driving circuit board, and the end cover is located at the other side of the driving circuit board; and the grounding column on the end cover passes through the driving circuit board and then contacts with the female elastic piece group on the grounding terminal.
In the above technical scheme, dodging holes are formed in the driving circuit board, and the grounding posts on the end covers penetrate through the dodging holes and then are in contact with the female connection elastic sheet groups on the grounding terminals.
In the above technical scheme, the diameter of the grounding column on the end cover is D1, the inner diameter of the avoidance hole is D2, and then: d2 > D1.
In the above technical solution, the female elastic piece group includes two elastic piece units opposite to each other; the grounding column on the end cover can be clamped between the two elastic sheet units, so that the grounding column is contacted with the female elastic sheet group.
In the above technical solution, each spring plate unit includes a vertical arm arranged vertically, and an inclined arm integrally arranged with the vertical arm and inclined to open in the direction of the driving circuit board; when the end cover is assembled, the grounding column on the end cover can be led into the space between the vertical arms of the two elastic sheet units through the inclined arms.
In the above technical solution, the diameter of the grounding post on the end cover is D1, and the distance between the vertical arms of the two spring plate units is B, then there are: d1 > B.
In the above technical scheme, a winding frame is arranged on a stator core of the stator assembly; and the stator core of the stator assembly also leads out corresponding phase pole terminals according to the phase number of the stator assembly.
An electronic water pump comprises a driving circuit board, an end cover, a pump shell, a shaft core, a rotor assembly and a stator assembly; a water inlet channel and a water outlet channel which are communicated with the inner side and the outer side of the pump cover are formed on the pump cover; a rotor chamber is formed in the pump shell, and the pump cover and the pump shell are mutually jointed and fixed, so that an impeller chamber is formed in the pump cover; the shaft core is arranged along the axial direction of the rotor chamber and the impeller chamber and is fixed in the rotor chamber and the impeller chamber; the rotor assembly comprises a permanent magnet part and an impeller part which are connected with each other, the rotor assembly is supported by the shaft core in a space enclosed by the pump cover and the pump shell, the permanent magnet part is positioned in the rotor chamber, and the impeller part is positioned in the impeller chamber; the stator assembly is arranged in the pump shell and surrounds the rotor chamber, so that the stator assembly can magnetically couple and link the rotor assembly to rotate; the driving circuit board is accommodated and fixed on one side of the pump shell, which is opposite to the pump cover, and is electrically connected with the stator assembly, the end cover is fixed on one end of the pump shell, which is opposite to the pump cover, and the pump shell is sealed through the end cover, so that the stator assembly and the driving circuit board are sealed; a grounding terminal is led out of a stator core of the stator assembly, and a female connection elastic sheet group is integrally arranged on the grounding terminal; the inner side of the end cover is integrally provided with a grounding column; after the electronic water pump is assembled, the grounding terminal of the stator assembly is welded on the driving circuit board and is electrically communicated with the negative electrode and/or the grounding electrode of the driving circuit board through a printed circuit on the driving circuit board, and the grounding post on the end cover is in contact with the female elastic piece group on the grounding terminal.
A new energy automobile is provided, which uses the electronic water pump.
Compared with the prior art, the invention has the beneficial effects that:
1. According to the grounding structure of the end cover and the stator core and the electronic water pump, the grounding terminal of the stator assembly is welded on the driving circuit board, the grounding column on the end cover is contacted with the female elastic sheet group on the grounding terminal, and meanwhile reliable grounding of the end cover and the stator core is achieved; the grounding terminal belongs to a necessary part of the stator assembly, and reliable grounding of the end cover and the stator core can be realized simultaneously only by adding a female connection spring piece group on the grounding terminal and adding a grounding column on the end cover; compared with the arrangement of independent intermediate connecting pieces, the grounding structure of the end cover and the stator core can be effectively simplified, the requirements on the number of parts, manufacturing precision and assembly precision are low, and the cost of the grounding structure is effectively reduced; in addition, set up the grounding post on the end cover an organic whole to set up female grafting shell fragment group on the earthing terminal an organic whole, even in vibration environment or long-term use, both are difficult for dislocation each other.
2. The new energy automobile has the electronic water pump with good EMC performance, low cost and easy assembly, and can effectively cool heating components such as a power battery, a driving motor and the like.
Drawings
Fig. 1 is a structural view of a first embodiment and a second embodiment of the present invention.
Fig. 2 is one of the sectional views of the first and second embodiments of the present invention.
Fig. 3 is a second cross-sectional view of the first and second embodiments of the present invention.
Fig. 4 is a structural view of an end cap in the first and second embodiments of the present invention.
Fig. 5 is one of structural views of a stator assembly in the first and second embodiments of the present invention.
Fig. 6 is a second structural view of a stator assembly in the first and second embodiments of the present invention.
Fig. 7 is one of structural views of the ground terminal in the first and second embodiments of the present invention.
Fig. 8 is a second structural view of a ground terminal in the first and second embodiments of the present invention.
The reference numerals are: 1. a driving circuit board; 11. avoidance holes; 2. an end cap; 21. a grounding column; 3. a stator assembly; 31. a stator core; 32. a ground terminal; 33. a female connection spring piece group; 34. a spring plate unit; 341. a vertical arm; 342. a tilting arm; 35. a bobbin; 36. a phase electrode terminal; 4. a pump housing; 41. a rotor chamber.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Embodiment one:
The embodiment provides a grounding structure of an end cover and a stator core, which is applied to an electronic water pump and has a structure with low cost and easy assembly.
Referring to fig. 1-3, the electronic water pump at least includes a driving circuit board 1, a stator assembly 3, and a metallic end cover 2.
The driving circuit board 1 is based on a Printed Circuit Board (PCB), and is provided with a Main Control Unit (MCU), power electronic devices, corresponding printed circuits and peripheral components, and is used for receiving electric energy and control signals and driving a stator assembly 3 of the electronic water pump to operate; the stator assembly 3 is an annular coil assembly, and is actually based on an annular stator core 31, wherein the stator core 31 is formed by stacking a plurality of silicon steel sheets; the end cap 2 is a circular plate-shaped cap body made of metal, preferably aluminum alloy or stainless steel, and in practice, the end cap 2 should have good electrical conductivity.
Referring to fig. 5 and 6, a grounding terminal 32 is led out from a stator core 31 of the stator assembly 3, actually, the grounding terminal 32 is a copper or aluminum alloy terminal integrated on the stator core 31, a female elastic sheet set 33 is integrally arranged on the grounding terminal 32, and the female elastic sheet set 33 can be processed on the grounding terminal 32 by stamping; referring to fig. 4, the inner side of the end cover 2 is integrally provided with a grounding post 21, specifically, the grounding post 21 is integrally die-cast with the body of the end cover 2, or the grounding post 21 is machined on the end cover 2 by milling; after the electronic water pump is assembled, the grounding terminal 32 of the stator assembly 3 is welded on the driving circuit board 1 and is electrically connected to the negative electrode and/or the grounding electrode of the driving circuit board 1 through a printed circuit on the driving circuit board 1, and the grounding post 21 on the end cover 2 is in contact with the female elastic sheet group 33 on the grounding terminal 32.
Referring to fig. 1-3, specifically, after the electronic water pump is assembled, the female elastic piece set 33 on the grounding terminal 32 is located at one side of the driving circuit board 1, and the end cover 2 is located at the other side of the driving circuit board 1; after passing through the driving circuit board 1, the grounding post 21 on the end cover 2 contacts with the female elastic piece group 33 on the grounding terminal 32.
Further specifically, the drive circuit board 1 is provided with an avoidance hole 11, and the grounding column 21 on the end cover 2 passes through the avoidance hole 11 and then contacts with the female elastic sheet group 33 on the grounding terminal 32; the provision of the escape hole 11 enables the ground post 21 on the end cap 2 to pass smoothly through the drive circuit board 1.
Referring to fig. 3, further, the diameter of the grounding post 21 on the end cap 2 is D1, and the inner diameter of the avoiding hole 11 is D2, and there are: d2 > D1; in other words, a certain gap is formed between the grounding post 21 on the end cover 2 and the avoiding hole 11 on the driving circuit board 1, so that the grounding post 21 is suspended in the driving circuit board 1; when the electronic water pump is assembled, the grounding column 21 on the end cover 2 can smoothly pass through the avoiding hole 11 on the driving circuit board 1; after the electronic water pump is assembled, the grounding post 21 cannot collide and interfere with the driving circuit board 1; with this setting, reduce assembly precision requirement and part size tolerance precision requirement, and then reduce manufacturing cost to promote assembly convenience and production efficiency.
Referring to fig. 7 and 8, specifically, the female spring piece set 33 includes two opposite spring piece units 34, and the two spring piece units 34 are all integrally disposed with the ground terminal 32; the grounding post 21 on the end cap 2 can be clamped between the two spring plate units 34, thereby realizing mutual contact with the female spring plate group 33.
Further specifically, each of the dome units 34 includes a vertical arm 341 provided vertically, and an inclined arm 342 provided integrally with the vertical arm 341 and inclined to open toward the driving circuit board 1; that is, the vertical arms 341 of the two spring plate units 34 are arranged in parallel with each other with a certain gap, and the inclined arms 342 of the two spring plate units 34 are inclined to open toward the driving circuit board 1 to form a V-shaped structure with the large end opening facing the driving circuit board 1; when the end cover 2 is assembled, the grounding column 21 on the end cover 2 can be led between the vertical arms 341 of the two shrapnel units 34 through the inclined arms 342, so that the assembly convenience and the production efficiency are further improved.
Further, the diameter of the grounding post 21 on the end cap 2 is D1, the distance between the vertical arms 341 of the two spring plate units 34 is B, and then: d1 > B; in other words, the grounding post 21 on the end cover 2 is in interference fit with the female elastic piece set 33 on the grounding terminal 32, so that the vertical arms 341 of the two elastic piece units 34 can generate a certain clamping force on the grounding post 21, the effective contact between the grounding post 21 and the female elastic piece set 33 is ensured, the reliability of electrical conduction is improved, and the mutual dislocation of the grounding post 21 and the female elastic piece set 33 can be avoided.
It should be further noted that, the stator core 31 of the stator assembly 3 is provided with a winding frame 35 for winding the enamelled wire of the stator assembly 3 thereon; in this embodiment, three phase pole terminals 36 are provided, corresponding to U, V and W three phases respectively, and each phase pole terminal 36 is welded on the driving circuit board 1.
In the grounding structure of the end cover and the stator core of the embodiment, the grounding terminal 32 of the stator assembly 3 is welded on the driving circuit board 1, the grounding post 21 on the end cover 2 is contacted with the female elastic sheet group 33 on the grounding terminal 32, and reliable grounding of the end cover 2 and the stator core 31 is realized; the grounding terminal 32 belongs to a necessary part of the stator assembly 3, and reliable grounding of the end cover 2 and the stator core 31 can be realized simultaneously only by adding a female connection spring piece group 33 on the grounding terminal 32 and adding a grounding post 21 on the end cover 2; compared with the arrangement of independent intermediate connecting pieces, the grounding structure of the end cover and the stator core can be effectively simplified, the requirements on the number of parts, manufacturing precision and assembly precision are low, and the cost of the grounding structure is effectively reduced; in addition, the grounding post 21 is integrally provided on the end cap 2, and the female elastic piece group 33 is integrally provided on the grounding terminal 32, so that the two are not easily dislocated from each other even in a vibration environment or in long-term use.
Embodiment two:
The embodiment provides an electronic water pump which can drive fluid media such as water, cooling liquid, oil path media and the like to enable the fluid media to flow directionally.
Referring to fig. 1-3, the electronic water pump of the present embodiment includes a driving circuit board 1, an end cover 2, a pump cover, a pump casing 4, a shaft core, a rotor assembly and a stator assembly 3 (the pump cover, the shaft core and the rotor assembly are not shown).
The pump cover is an integrally formed engineering plastic or metal cover body, and a water inlet channel and a water outlet channel which are communicated with the inner side and the outer side of the pump cover are formed on the pump cover; the pump shell 4 is an integrally formed opening half shell made of engineering plastic or metal, and is matched with the pump cover in shape; the shaft core is a cylindrical shaft body made of metal, has a smooth surface and is suitable for being used as a supporting shaft; the stator assembly 3 is an annular coil assembly, and is actually based on an annular stator core 31, wherein the stator core 31 is formed by stacking a plurality of silicon steel sheets; the driving circuit board 1 is based on a Printed Circuit Board (PCB) on which a Main Control (MCU), power electronics and corresponding printed circuits and peripheral components are mounted, for receiving electric power and control signals and driving the stator assembly 3 to operate; the end cap 2 is a circular plate-shaped cap body made of metal, preferably aluminum alloy or stainless steel, and in practice, the end cap 2 should have good electrical conductivity.
A rotor chamber 41 is formed in the pump housing 4, specifically, one end of the pump housing 4 is sunk to form an open cylindrical cavity, which is the rotor chamber 41; the pump cover and the pump shell 4 are mutually jointed and fixed, so that an impeller chamber is formed in the pump cover, and the rotor chamber 41 and the impeller chamber are mutually communicated; the shaft core is disposed along the axial direction of the rotor chamber 41 and the impeller chamber, and is fixed in the rotor chamber 41 and the impeller chamber. The rotor assembly comprises a permanent magnet part and an impeller part which are connected with each other, in practice, the rotor assembly is based on a rotor bracket, a magnetic ring is fixedly arranged on one side of the rotor bracket, namely the permanent magnet part is formed, an impeller with a plurality of blades is fixedly arranged on the other side of the rotor bracket, namely the impeller part is formed, and an inner hole of the rotor assembly is a ceramic bearing/graphite bearing; the rotor assembly is supported in the space enclosed by the pump cover and the pump shell 4 by the shaft core, so that the permanent magnet part is positioned in the rotor chamber 41, and the impeller part is positioned in the impeller chamber, specifically, the ceramic bearing/graphite bearing of the rotor assembly is sleeved on the shaft core, so that the shaft core can support the whole rotor assembly; the stator assembly 3 is arranged in the pump housing 4 and around the rotor chamber 41, so that the stator assembly 3 can magnetically couple and link the rotor assembly to rotate, and in fact, the stator core 31 of the stator assembly 3 is fixed outside the rotor chamber 41 by means of glue or interference fit; the driving circuit board 1 is accommodated at one side of the pump shell 4 opposite to the pump cover, the driving circuit board 1 is electrically connected with the stator assembly 3, the end cover 2 is fixed at one end of the pump shell 4 opposite to the pump cover, and the pump shell 4 is closed through the end cover 2, so that the stator assembly 3 and the driving circuit board 1 are sealed.
Referring to fig. 5 and 6, a grounding terminal 32 is led out from a stator core 31 of the stator assembly 3, actually, the grounding terminal 32 is a copper or aluminum alloy terminal integrated on the stator core 31, a female elastic sheet set 33 is integrally arranged on the grounding terminal 32, and the female elastic sheet set 33 can be processed on the grounding terminal 32 by stamping; referring to fig. 4, the inner side of the end cover 2 is integrally provided with a grounding post 21, specifically, the grounding post 21 is integrally die-cast with the body of the end cover 2, or the grounding post 21 is machined on the end cover 2 by milling; after the electronic water pump is assembled, the grounding terminal 32 of the stator assembly 3 is welded on the driving circuit board 1 and is electrically connected to the negative electrode and/or the grounding electrode of the driving circuit board 1 through a printed circuit on the driving circuit board 1, and the grounding post 21 on the end cover 2 is in contact with the female elastic sheet group 33 on the grounding terminal 32.
Referring to fig. 1-3, specifically, after the electronic water pump is assembled, the female elastic piece set 33 on the grounding terminal 32 is located at one side of the driving circuit board 1, and the end cover 2 is located at the other side of the driving circuit board 1; after passing through the driving circuit board 1, the grounding post 21 on the end cover 2 contacts with the female elastic piece group 33 on the grounding terminal 32.
Further specifically, the drive circuit board 1 is provided with an avoidance hole 11, and the grounding column 21 on the end cover 2 passes through the avoidance hole 11 and then contacts with the female elastic sheet group 33 on the grounding terminal 32; the provision of the escape hole 11 enables the ground post 21 on the end cap 2 to pass smoothly through the drive circuit board 1.
Referring to fig. 3, further, the diameter of the grounding post 21 on the end cap 2 is D1, and the inner diameter of the avoiding hole 11 is D2, and there are: d2 > D1; in other words, a certain gap is formed between the grounding post 21 on the end cover 2 and the avoiding hole 11 on the driving circuit board 1, so that the grounding post 21 is suspended in the driving circuit board 1; when the electronic water pump is assembled, the grounding column 21 on the end cover 2 can smoothly pass through the avoiding hole 11 on the driving circuit board 1; after the electronic water pump is assembled, the grounding post 21 cannot collide and interfere with the driving circuit board 1; with this setting, reduce assembly precision requirement and part size tolerance precision requirement, and then reduce manufacturing cost to promote assembly convenience and production efficiency.
Referring to fig. 7 and 8, specifically, the female spring piece set 33 includes two opposite spring piece units 34, and the two spring piece units 34 are all integrally disposed with the ground terminal 32; the grounding post 21 on the end cap 2 can be clamped between the two spring plate units 34, thereby realizing mutual contact with the female spring plate group 33.
Further specifically, each of the dome units 34 includes a vertical arm 341 provided vertically, and an inclined arm 342 provided integrally with the vertical arm 341 and inclined to open toward the driving circuit board 1; that is, the vertical arms 341 of the two spring plate units 34 are arranged in parallel with each other with a certain gap, and the inclined arms 342 of the two spring plate units 34 are inclined to open toward the driving circuit board 1 to form a V-shaped structure with the large end opening facing the driving circuit board 1; when the end cover 2 is assembled, the grounding column 21 on the end cover 2 can be led between the vertical arms 341 of the two shrapnel units 34 through the inclined arms 342, so that the assembly convenience and the production efficiency are further improved.
Further, the diameter of the grounding post 21 on the end cap 2 is D1, the distance between the vertical arms 341 of the two spring plate units 34 is B, and then: d1 > B; in other words, the grounding post 21 on the end cover 2 is in interference fit with the female elastic piece set 33 on the grounding terminal 32, so that the vertical arms 341 of the two elastic piece units 34 can generate a certain clamping force on the grounding post 21, the effective contact between the grounding post 21 and the female elastic piece set 33 is ensured, the reliability of electrical conduction is improved, and the mutual dislocation of the grounding post 21 and the female elastic piece set 33 can be avoided.
It should be further noted that, the stator core 31 of the stator assembly 3 is provided with a winding frame 35 for winding the enamelled wire of the stator assembly 3 thereon; in this embodiment, three phase pole terminals 36 are provided, corresponding to U, V and W three phases respectively, and each phase pole terminal 36 is welded on the driving circuit board 1 to realize electrical connection between the driving circuit board 1 and the stator assembly 3.
When the electronic water pump is used, electric energy and control signals are fed into the driving circuit board 1 through the connector, so that the driving circuit board 1 can drive the stator assembly 3 to operate; after the stator assembly 3 is electrified, a rotating magnetic field can be generated in the inner ring of the stator assembly, and the permanent magnet part of the rotor assembly can generate a rotating moment in the rotating magnetic field, so that the whole rotor assembly rotates; the rotating impeller portion is capable of driving the fluid medium, so that the fluid medium is sucked into the rotor chamber 41 from the water inlet channel and guided out from the water outlet channel under the guidance of the pump cover, thereby realizing the function of driving the fluid medium to operate.
In the electronic water pump of the embodiment, the grounding terminal 32 of the stator assembly 3 is welded on the driving circuit board 1, the grounding post 21 on the end cover 2 is contacted with the female elastic sheet group 33 on the grounding terminal 32, and reliable grounding of the end cover 2 and the stator core 31 is realized; the grounding terminal 32 belongs to a necessary part of the stator assembly 3, and reliable grounding of the end cover 2 and the stator core 31 can be realized simultaneously only by adding a female connection spring piece group 33 on the grounding terminal 32 and adding a grounding post 21 on the end cover 2; compared with the arrangement of independent intermediate connecting pieces, the grounding structure of the end cover and the stator core can be effectively simplified, the requirements on the number of parts, manufacturing precision and assembly precision are low, and the cost of the grounding structure is effectively reduced; in addition, the grounding post 21 is integrally provided on the end cap 2, and the female elastic piece group 33 is integrally provided on the grounding terminal 32, so that the two are not easily dislocated from each other even in a vibration environment or in long-term use.
Embodiment III:
The embodiment provides a new energy automobile, which is applied with the electronic water pump in the second embodiment.
Through this electronic water pump, provide the power supply for the whole cooling system of new energy automobile, make power battery, the driving motor etc. of new energy automobile generate heat the part and can drive the coolant liquid through electronic water pump and carry out the circulative cooling.
The new energy automobile of this embodiment, it has the electron water pump that EMC performance is good, with low costs and easy assembly, can cool off for power battery, driving motor etc. heating element effectively.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (8)
1. The grounding structure of the end cover and the stator core is characterized by being applied to an electronic water pump, wherein the electronic water pump at least comprises a driving circuit board, a stator assembly and an end cover made of metal;
a grounding terminal is led out of a stator core of the stator assembly, and a female connection elastic sheet group is integrally arranged on the grounding terminal;
the inner side of the end cover is integrally provided with a grounding column;
After the electronic water pump is assembled, the grounding terminal of the stator assembly is welded on the driving circuit board and is electrically communicated with the negative electrode and/or the grounding electrode of the driving circuit board through a printed circuit on the driving circuit board, and the grounding column on the end cover is in contact with the female elastic piece group on the grounding terminal;
The female connection elastic sheet group comprises two elastic sheet units which are opposite to each other;
the grounding column on the end cover can be clamped between the two elastic sheet units, so that the grounding column is in contact with the female elastic sheet group;
Each elastic sheet unit comprises a vertical arm which is vertically arranged and an inclined arm which is integrally arranged with the vertical arm and is inclined to the direction of the driving circuit board to be opened;
when the end cover is assembled, the grounding column on the end cover can be led into the space between the vertical arms of the two elastic sheet units through the inclined arms.
2. The ground structure of the end cap and the stator core according to claim 1, wherein: after the electronic water pump is assembled, the female elastic piece group on the grounding terminal is positioned on one side of the driving circuit board, and the end cover is positioned on the other side of the driving circuit board;
and the grounding column on the end cover passes through the driving circuit board and then contacts with the female elastic piece group on the grounding terminal.
3. The grounding structure of an end cap and a stator core as claimed in claim 2, wherein: the drive circuit board is provided with an avoidance hole, and the grounding column on the end cover passes through the avoidance hole and then contacts with the female elastic sheet group on the grounding terminal.
4. A grounding structure of an end cap and a stator core as claimed in claim 3, wherein: the diameter of the grounding column on the end cover is D1, the inner diameter of the avoidance hole is D2, and the grounding column comprises: d2 > D1.
5. The ground structure of the end cap and the stator core according to claim 1, wherein: the diameter of the grounding column on the end cover is D1, the distance between the vertical arms of the two elastic sheet units is B, and then: d1 > B.
6. The ground structure of the end cap and the stator core according to claim 1, wherein: a winding frame is arranged on a stator core of the stator assembly;
And the stator core of the stator assembly also leads out corresponding phase pole terminals according to the phase number of the stator assembly.
7. The electronic water pump is characterized by comprising a driving circuit board, an end cover, a pump shell, a shaft core, a rotor assembly and a stator assembly;
a water inlet channel and a water outlet channel which are communicated with the inner side and the outer side of the pump cover are formed on the pump cover;
A rotor chamber is formed in the pump shell, and the pump cover and the pump shell are mutually jointed and fixed, so that an impeller chamber is formed in the pump cover;
The shaft core is arranged along the axial direction of the rotor chamber and the impeller chamber and is fixed in the rotor chamber and the impeller chamber;
the rotor assembly comprises a permanent magnet part and an impeller part which are connected with each other, the rotor assembly is supported by the shaft core in a space enclosed by the pump cover and the pump shell, the permanent magnet part is positioned in the rotor chamber, and the impeller part is positioned in the impeller chamber;
The stator assembly is arranged in the pump shell and surrounds the rotor chamber, so that the stator assembly can magnetically couple and link the rotor assembly to rotate;
The driving circuit board is accommodated and fixed on one side of the pump shell, which is opposite to the pump cover, and is electrically connected with the stator assembly, the end cover is fixed on one end of the pump shell, which is opposite to the pump cover, and the pump shell is sealed through the end cover, so that the stator assembly and the driving circuit board are sealed;
a grounding terminal is led out of a stator core of the stator assembly, and a female connection elastic sheet group is integrally arranged on the grounding terminal;
the inner side of the end cover is integrally provided with a grounding column;
After the electronic water pump is assembled, the grounding terminal of the stator assembly is welded on the driving circuit board and is electrically communicated with the negative electrode and/or the grounding electrode of the driving circuit board through a printed circuit on the driving circuit board, and the grounding column on the end cover is in contact with the female elastic piece group on the grounding terminal;
The female connection elastic sheet group comprises two elastic sheet units which are opposite to each other;
the grounding column on the end cover can be clamped between the two elastic sheet units, so that the grounding column is in contact with the female elastic sheet group;
Each elastic sheet unit comprises a vertical arm which is vertically arranged and an inclined arm which is integrally arranged with the vertical arm and is inclined to the direction of the driving circuit board to be opened;
when the end cover is assembled, the grounding column on the end cover can be led into the space between the vertical arms of the two elastic sheet units through the inclined arms.
8. A new energy automobile, characterized in that the electronic water pump of claim 7 is applied.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310000311.7A CN116054457B (en) | 2023-01-02 | 2023-01-02 | Grounding structure of end cover and stator core, electronic water pump and new energy automobile |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310000311.7A CN116054457B (en) | 2023-01-02 | 2023-01-02 | Grounding structure of end cover and stator core, electronic water pump and new energy automobile |
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| CN116054457A CN116054457A (en) | 2023-05-02 |
| CN116054457B true CN116054457B (en) | 2024-05-14 |
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| CN202310000311.7A Active CN116054457B (en) | 2023-01-02 | 2023-01-02 | Grounding structure of end cover and stator core, electronic water pump and new energy automobile |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116292322B (en) * | 2023-05-25 | 2023-10-27 | 威晟汽车科技(宁波)有限公司 | Automobile electronic water pump |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW458457U (en) * | 1999-12-13 | 2001-10-01 | Signal Catv System Inc | Automatic impedance matching device of communication signal distributor |
| CN210518026U (en) * | 2019-09-25 | 2020-05-12 | 汉宇集团股份有限公司 | Electronic water pump |
| CN211377831U (en) * | 2020-01-03 | 2020-08-28 | 厦门精研自动化元件有限公司 | Servo motor grounding structure |
| CN113969822A (en) * | 2020-07-24 | 2022-01-25 | 安徽威灵汽车部件有限公司 | Electronic water pump and vehicle with same |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6869295B2 (en) * | 2003-08-21 | 2005-03-22 | Schweitzer Engineering Laboratories, Inc. | Electrical connection grounding element for use with a printed circuit board and an electronic equipment chassis |
| ES2311930T3 (en) * | 2005-02-07 | 2009-02-16 | EBM-PAPST MULFINGEN GMBH & CO.KG | STATOR OF AN ELECTRIC MOTOR AND PROCEDURE FOR MANUFACTURING. |
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2023
- 2023-01-02 CN CN202310000311.7A patent/CN116054457B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW458457U (en) * | 1999-12-13 | 2001-10-01 | Signal Catv System Inc | Automatic impedance matching device of communication signal distributor |
| CN210518026U (en) * | 2019-09-25 | 2020-05-12 | 汉宇集团股份有限公司 | Electronic water pump |
| CN211377831U (en) * | 2020-01-03 | 2020-08-28 | 厦门精研自动化元件有限公司 | Servo motor grounding structure |
| CN113969822A (en) * | 2020-07-24 | 2022-01-25 | 安徽威灵汽车部件有限公司 | Electronic water pump and vehicle with same |
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| CN116054457A (en) | 2023-05-02 |
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