CN210240012U

CN210240012U - Electric pump

Info

Publication number: CN210240012U
Application number: CN201920060412.2U
Authority: CN
Inventors: Inventor Has Waived The Right To Be Mentioned The; 不公告发明人
Original assignee: Hangzhou Sanhua Research Institute Co Ltd
Current assignee: Zhejiang Sanhua Intelligent Controls Co Ltd
Priority date: 2019-01-15
Filing date: 2019-01-15
Publication date: 2020-04-03
Anticipated expiration: 2029-01-15

Abstract

An electric pump comprises a pump shell, an isolation sleeve, a rotor assembly and a driving assembly, wherein the driving assembly comprises a connecting piece, a connecting terminal, a stator assembly and a circuit board; the first groove is a notch formed from the outer periphery of the body part, the stator assembly comprises a winding, a first part of the winding is positioned on the upper side of the body part, a second part of the winding is positioned on the lower side of the body part, and a connecting part between the first part and the second part is positioned in the first groove; the connecting terminal is spliced with the connecting terminal installation part, the second part comprises a winding end part, the winding end part is partially clamped between the first end part of the connecting terminal and the connecting terminal installation part, the winding end part can be electrically connected with the connecting terminal between the first end part of the connecting terminal and the connecting terminal installation part, and the second end part of the connecting terminal is electrically connected with the circuit board. The electric pump is more convenient to assemble, and the connecting terminals can be more flexibly arranged.

Description

Electric pump

[ technical field ] A method for producing a semiconductor device

The utility model relates to an electric pump, electric pump can be applied to heat pump circulation system or lubricating system.

[ background of the invention ]

In recent decades, electric pumps have gradually replaced traditional mechanical pumps, and are widely used in heat dissipation and heating circulation systems of vehicles, so as to meet market requirements.

The electric pump comprises a stator component and a circuit board, and the connection mode of the stator component and the circuit board influences the assembly process of the electric pump, so that how to design the connection mode of the stator component and the circuit board is convenient for the assembly of the electric pump to be considered in the design process.

[ Utility model ] content

An object of the utility model is to provide an electric pump relates to the improvement to stator module and circuit board connected mode, makes things convenient for the equipment of electric pump.

The utility model adopts the following technical scheme: an electric pump comprising a pump housing, an isolation sleeve, a rotor assembly, and a drive assembly, the pump housing capable of forming a pump interior cavity, the pump interior cavity comprising a first cavity and a second cavity, the first cavity and the second cavity not being in communication, the first cavity located inside the isolation sleeve, the second cavity located outside the isolation sleeve, at least a portion of the rotor assembly located in the first cavity, and at least a portion of the drive assembly located in the second cavity; the driving assembly comprises a connecting piece, a connecting terminal, a stator assembly and a circuit board, wherein the connecting piece and the connecting terminal connect the circuit board and the stator assembly into a whole, and the connecting piece comprises a body part, a first groove and a connecting terminal mounting part; the first groove is a notch formed from the outer periphery of the body part, the stator assembly comprises a winding, a first part of the winding is positioned on the upper side of the body part, a second part of the winding is positioned on the lower side of the body part, and a connecting part between the first part and the second part is positioned in the first groove; the connecting terminal installation department protrusion in this somatic part, connecting terminal with the connecting terminal installation department is pegged graft, the second portion includes wire end, part wire end joint in connecting terminal's first end with between the connecting terminal installation department, wire end is in connecting terminal's first end with between the connecting terminal installation department can with connecting terminal electricity is connected, connecting terminal's second end with circuit board electricity is connected.

The electric pump comprises a driving assembly, wherein the driving assembly comprises a connecting piece, a connecting terminal, a stator assembly and a circuit board, the connecting piece and the connecting terminal connect the circuit board and the stator assembly into a whole, the connecting piece comprises a body part, a first groove and a connecting terminal installation part, a first part of a winding of the stator assembly is positioned on the upper side of the body part, a second part of the winding is positioned on the lower side of the body part, a connecting part of the winding is positioned in the first groove, the end part of the winding can be electrically connected with the connecting terminal between the connecting terminal and the terminal installation part, and; thus, the circuit board and the stator assembly are connected into a whole through the connecting piece and the connecting terminals, the electric pump is more convenient to assemble, and the connecting terminals can be arranged more flexibly.

[ description of the drawings ]

Fig. 1 is a schematic cross-sectional view of a first embodiment of an electric pump according to the present invention;

FIG. 2 is a schematic view of a perspective view of the drive assembly of FIG. 1;

FIG. 3 is a structural schematic diagram of one perspective of the stator assembly of FIG. 1 in combination with a connection piece;

FIG. 4 is a structural schematic diagram of another perspective of the stator assembly of FIG. 1 in combination with a connection piece;

FIG. 5 is a schematic structural view of a still further perspective of the stator assembly of FIG. 1 in combination with a connection piece;

FIG. 6 is a structural schematic diagram of one perspective of the stator assembly of FIG. 1;

FIG. 7 is a structural schematic diagram of a perspective of the connector of FIG. 1;

FIG. 8 is a schematic view of the connector of FIG. 1 from another perspective;

FIG. 9 is a schematic view of the structure of the connection terminal of FIG. 1 from one perspective;

fig. 10 is a schematic view of another perspective structure of the connection terminal of fig. 1;

FIG. 11 is a schematic diagram of a perspective view of a second embodiment of the drive assembly of FIG. 1;

figure 12 is a structural schematic diagram of one perspective of the second embodiment of the stator assembly and connection of figure 1.

[ detailed description ] embodiments

The invention will be further described with reference to the following drawings and specific embodiments:

referring to fig. 1 and 2, the electric pump 100 is applied to a fluid circulation system, and the electric pump can drive fluid in the circulation system to flow, and the fluid in the circulation system can be lubricating oil of a lubrication system or cooling fluid of a cooling fluid system. The following description will be given taking an electric pump applied to a coolant circulation system as an example. The electric pump 100 includes a pump housing including a first casing 10 and a second casing 30, the first casing 10 and the second casing 30 being relatively fixed, a spacer 20, a pump shaft 40, a rotor assembly 50, a heat sink assembly 60, and a drive assembly 70. The pump shell can form a pump inner cavity, the pump inner cavity comprises a first cavity 81 and a second cavity 82, the isolation sleeve 20 relatively isolates the first cavity 81 from the second cavity 82, the first cavity 81 is not communicated with the second cavity 82, the first cavity 81 is positioned on the inner side of the isolation sleeve 20, the second cavity 82 is positioned on the outer side of the isolation sleeve 20, when the electric pump 100 works, a working medium can flow through the first cavity 81, and no working medium flows through the second cavity 82; at least part of the pump shaft 40 and the rotor assembly 50 are disposed in the first chamber 81, and at least part of the driving assembly 70 is disposed in the second chamber 82; specifically, a part of the isolation sleeve 20 extends into the second housing 30, the other part of the isolation sleeve 20 is located between the first housing 10 and the second housing 30, the connection part between the first housing 10 and the isolation sleeve 20 and the connection part between the isolation sleeve 20 and the second housing 30 are provided with annular sealing rings 90, and the annular sealing rings 90 can prevent the working medium from seeping out at the connection part and prevent the external medium from seeping into the inner cavity of the pump. Drive assembly 70 includes connecting piece 1, stator module 2, circuit board 3 and connecting terminal 4, and connecting piece 1 and connecting terminal 4 are connected circuit board 3 and stator module 2 as a whole, and stator module 2 stretches into second casing 30, and with second casing 30 relatively fixed, connecting piece 1 can with stator module 2 relatively fixed, and connecting piece 1 also can with second casing 30 relatively fixed, radiator unit 60 and second casing 30 fixed connection for with the heat transfer and the heat dissipation of circuit board 3, thereby be favorable to improving the life-span of circuit board 3.

In an embodiment of the present invention, referring to fig. 2-10, the connecting member 1 includes a body portion 11, a connecting terminal mounting portion 12 and a first groove 16, the first groove 16 and the connecting terminal mounting portion 12 are formed in the body portion 11, the body portion 11 includes an upper surface 111 and a lower surface 112, the upper surface 111 and the lower surface 112 are oppositely disposed, one surface facing the stator assembly 2 is defined as the upper surface 111, one surface facing the circuit board 3 is defined as the lower surface 112, one side of the upper surface 111 of the body portion 11 is defined as an upper side of the body portion 11, and one side of the lower surface 112 of the body portion 11 is defined as a lower side of the body portion 11; the first grooves 16 are notches formed from the outer periphery of the main body 11, and in this embodiment, the number of the first grooves 16 is 3; the stator assembly 2 includes the winding 23, the winding 23 includes a winding wire 231, the winding wire includes a first portion (not shown in the figure) and a second portion 232, the first portion of the winding wire 231 is located at the upper side of the body part 11, the second portion 232 of the winding wire 231 is located at the lower side of the body part 11, and a connection portion (not shown in the figure) between the first portion and the second portion 232 is located in the first slot 16; the connection terminal mounting portion 12 protrudes from the body portion 11, specifically, the connection terminal mounting portion 12 protrudes from the lower surface 112 of the body portion 11 toward the circuit board, the connection terminal 4 includes a base portion 44, a first end portion 45 and a second end portion 46, the connection terminal 4 is inserted into the connection terminal mounting portion 12, the second portion 232 includes a winding end portion 233, the winding end portion 233 is clamped between the first end portion 45 of the connection terminal 4 and the connection terminal mounting portion 12, the winding end portion 233 can be electrically connected to the connection terminal 4 between the first end portion 45 of the connection terminal 4 and the connection terminal mounting portion 12, the second end portion 46 of the connection terminal 4 is electrically connected to the circuit board 3, specifically, in the present embodiment, the first end 45 of the connection terminal 4 and the winding wire 231 may be electrically connected by being engaged, and the second end 46 of the connection terminal 4 and the circuit board 3 may be electrically connected by being pressed or engaged; in other embodiments, the first end portion 45 of the connection terminal 4 and the winding wire 231 may be clamped and then soldered and electrically connected, and the second end portion 46 of the connection terminal 4 may be crimped or clamped and then soldered and electrically connected with the circuit board 3; in another embodiment, the first end portion 45 of the connection terminal 4 and the winding wire 231 may be directly soldered and electrically connected, and the second end portion 46 of the connection terminal 4 may be directly soldered and electrically connected to the circuit board 3. Thus, the circuit board 3 and the stator assembly 2 are connected into a whole through the connecting piece 1 and the connecting terminals 4, the electric pump is more convenient to assemble, and the connecting terminals 4 can be more flexibly arranged. The scheme of the embodiment can reduce the welding steps of the winding 231 and the connecting terminal 4, is convenient to assemble and can be conveniently disassembled and assembled; the welding steps of the connecting terminals 4 and the circuit board 3 can be reduced, the disassembly and the assembly are convenient, meanwhile, impurities introduced during welding can be reduced, and the cleanliness of the circuit board 3 is kept. In other embodiments, the first end portion 45 of the connection terminal 4 and the winding 231 may be clamped and then welded, and the second end portion 46 of the connection terminal 4 may be crimped or clamped with the circuit board 3 and then welded, which is beneficial to further improving the connection strength and making the arrangement of the connection terminal more flexible. In another example, the first end portion 45 of the connection terminal 4 and the winding wire 231 may be directly electrically connected by soldering, and the second end portion 46 of the connection terminal 4 and the circuit board 3 may be directly electrically connected by soldering, so that the arrangement of the connection terminal may be more flexible.

In an embodiment of the present invention, please refer to fig. 2-10, the connection terminal installation portion 12 includes an installation cavity 124, the first end portion 45 of the connection terminal 4 includes a first branch portion 451 and a second branch portion 452, a distance between the first branch portion 451 and the second branch portion 452 is smaller than a wire diameter of the wire 231, the connection terminal installation portion 12 is formed with an installation groove 125, the installation groove 125 runs through the connection terminal installation portion 12 and is perpendicular to an extending direction of the installation cavity 124, the portion of the wire end portion 233 is located in the installation groove 125, the first end portion 45 of the connection terminal 4 is inserted into the installation cavity 124, the wire end portion 233 is located between the first branch portion 451 and the second branch portion 452 and is tightly matched with the first branch portion 451 and the second branch portion 452, and the wire end portion 233 is electrically connected with the first branch portion 451 and the second branch portion 452 in the installation groove 125. Specifically, the connection terminal mounting portion 12 includes at least 1 sub-connection terminal mounting portion, in this embodiment, the connection terminal mounting portion 12 of the connection member 1 includes a first connection terminal mounting portion 121, a second connection terminal mounting portion 122 and a third connection terminal mounting portion 123, the first connection terminal mounting portion 121 and the second connection terminal mounting portion 122 are connected by injection molding, and the second connection terminal mounting portion 122 and the third connection terminal mounting portion 123 are connected by injection molding, so that the first connection terminal mounting portion 121, the second connection terminal mounting portion 122 and the third connection terminal mounting portion 123 can be arranged in a stacked manner, and the structure is relatively compact. Taking the first connection terminal mounting portion 121 as an example, the first connection terminal mounting portion 121 includes a mounting cavity 124 and a mounting groove 125, the mounting groove 125 penetrates the first connection terminal mounting portion 121 and is disposed perpendicular to an extending direction of the mounting cavity 124, and a portion of the winding end 233 is located in the mounting groove 125. The connection terminal 4 includes at least one sub-connection terminal, in this embodiment, the connection terminal 4 includes a first connection terminal 41, a second connection terminal 42 and a third connection terminal 43, the first connection terminal 41 is disposed corresponding to the first connection terminal mounting portion 121, the second connection terminal 42 is disposed corresponding to the second connection terminal mounting portion 122, and the third connection terminal 43 is disposed corresponding to the third connection terminal mounting portion 123. Taking the first connection terminal 41 as an example, the first connection terminal 41 includes a base portion 44, a first end portion 45 and a second end portion 46, the base portion 44 is located between the first end portion 45 and the second end portion 46, the first end portion 45 includes a first branch portion 451 and a second branch portion 452, the first branch portion 451 and the second branch portion 452 extend from the base portion 44 to the back of the base portion 44, and a distance between the first branch portion 451 and the second branch portion 452 is smaller than a wire diameter of the winding wire 231. Describing the first connection terminal mounting portion 121 and the corresponding first connection terminal 41, the partial winding end 233 is located in the mounting groove 125, the first end 45 of the first connection terminal 41 is inserted into the mounting cavity 124, the winding end 233 is located between the first branch 451 and the second branch 452 and is tightly fitted to the first branch 451 and the second branch 452, the first branch 451 and the second branch 452 can contact with the metal part of the winding end 233, and the winding end 233 is electrically connected to the first branch 451 and the second branch 452 in the mounting groove 125, so that the first connection terminal 41 and the winding 231 are electrically connected, a welding step can be omitted, and the mounting is convenient. Second end 46 of connecting terminal 4 has the pinhole, second end 46 has certain flexible volume, circuit board 3 have with second end 46 complex connecting hole 31, the quantity of connecting hole 31 corresponds the setting with connecting terminal 4's quantity, second end 46 can close fixed connection through the pressure equipment with circuit board 3's connecting hole 31, thereby realize connecting terminal 4 and circuit board 3's electric connection, this can save the welded step, make things convenient for the dismouting, make things convenient for circuit board 3's installation, improve assembly efficiency, the impurity of introducing when can reducing the welding simultaneously, be favorable to keeping circuit board 3's cleanliness. Of course, in other embodiments, the second end 46 of the connection terminal 4 is electrically connected to the circuit board 3 by being snapped and soldered or the second end 46 of the connection terminal 4 is not provided with an eyelet, and the connection terminal 4 is directly electrically connected to the circuit board 3 by being soldered.

Referring to fig. 3, 5 and 7, the connecting member 1 further includes a limiting portion protruding from the body 11, the limiting portion protrudes from the connecting terminal mounting portion 12 in the same direction, and the winding end 233 extends along the extending direction of the mounting groove 125 after the second portion 232 of the winding 231 is limited by the limiting portion. Specifically, the limiting portion includes a first limiting portion 65, the first limiting portion 65 is located between the end of the first groove 16 and the connecting terminal mounting portion 12, the second portion 232 of the winding 231 is limited on the outer peripheral surface of the first limiting portion 65, and the upper end surface of the first limiting portion 65 can also prevent the connecting terminal 4 and the circuit board 3 from being excessively press-fitted during press-fitting. In this embodiment, the limiting portion further includes a second limiting portion 63, the second limiting portion 63 includes a first portion 631 and a second portion 632, the first portion 631 and the second portion 632 are both cylindrical bodies formed on the connecting component 1, the first portion 631 and the second portion 632 are separated by a preset distance, and the second portion 232 of the winding 231 is located between the first portion 631 and the second portion 632, in this embodiment, the first portion 631 is slightly larger than the second portion 632, and the first portion 631 is closer to the connecting portion than the second portion 632, so that the winding can be conveniently assembled, the second limiting portion 63 can guide routing of the winding 231, and meanwhile, the winding end 233 can vertically penetrate through the connecting terminal mounting portion 12 relatively, the assembly is convenient, the number of the second limiting portions 63 can be set as required, in this embodiment, the number of the second limiting portions 63 is 2. The connector 1 further includes a guiding portion 62, the guiding portion 62 is located between the first groove 16 and the limiting portion, and the second portion 232 of the winding wire 231 is guided by the periphery of the guiding portion 62 and then winds around the limiting portion. The limiting portion and the guiding portion 62 are provided, so that the arrangement of the winding wire 231 is reasonable, and the winding wire 231 is conveniently guided to the connecting terminal mounting portion 12. Through the cooperation of wire winding 231, spacing portion, guide portion 62, connecting terminal installation department 12 and connecting terminal 4, the degree of freedom of the position of connecting terminal installation department 12 on connecting piece 1 when the design is big, can be more nimble with connecting terminal 4's setting, can conveniently cooperate the components and parts overall arrangement of circuit board 3 to optimize the electric pump performance.

Referring to fig. 4, the connector 1 further includes a first clamping portion 13, the first clamping portion 13 is located on one side of the connection terminal mounting portion 12 away from the limiting portion, an extending portion 234 at the end of the winding wire 231 is located on the first clamping portion 13, the connector 1 is formed with an opening portion 14, the opening portion 14 is located away from the connection terminal mounting portion 12 than the first clamping portion 13, and the opening portion 14 penetrates through upper and lower surfaces of the body portion 11 of the connector 1. Specifically, the first connection terminal mounting portion 121 has the corresponding first clamping portion 13 and opening portion 14, the second connection terminal mounting portion 122 has the corresponding first clamping portion 13 and opening portion 14, and the third connection terminal mounting portion 123 has the corresponding first clamping portion 13 and opening portion 14. The connector 1 further includes a second clamping portion 15, the second clamping portion 15 is located between the first clamping portion 13 and the opening portion 14 corresponding to the third connection terminal mounting portion 123, and the first clamping portion 13 and the second clamping portion 15 are connected through the recess portion 17. The first clamping portion 13 and the second clamping portion 15 are arranged to fix the winding wire 231, and the opening portion 14 is arranged to facilitate the winding wire to be cut by a thread cutting tool. The opening 14, the recess 17 and the second clamping portion 15 corresponding to the third connection terminal mounting portion 123 can prevent the stator assembly 2 from interfering during trimming.

Referring to fig. 4 and 6, the stator assembly 2 further includes a stator core 21 and an insulating portion 22, the insulating portion 22 is fixed to the stator core 21 by injection molding, the stator core 21 provides support for the winding 23, and the insulating portion 22 may provide support for the winding 231 led out from the winding 23. The insulation part 22 includes at least one engaging part 24, in this embodiment, the number of the engaging parts 24 is 2, the engaging parts 24 are protruded from the insulation part 22 toward the direction of the connector 1, the engaging parts 24 and the insulation part 22 are integrally injection molded, and of course, in other embodiments, the engaging parts 24 are separately molded and fixed to the insulation part 22 by welding. The clamping part 24 comprises a supporting part 241 and a clamping hook part 242, the clamping hook part 242 is formed on the top end of the supporting part 241, the connecting piece 1 is provided with a structure matched with the clamping part 24, the clamping part 24 can be matched with the connecting piece 1 through clamping, the connecting piece 1 is limited, and therefore the stator assembly 2 and the connecting piece 1 can be conveniently connected, and the disassembly and the assembly are convenient. Of course, in other embodiments, the insulating portion 22 of the stator assembly 2 may be provided with a column structure instead of the engaging portion 24, and the insulating portion and the connecting member 1 are fixed by rivet hot riveting, so that the structural stability may be improved, or the engaging portion and the column structure may be provided at the same time, so that the structural stability may be improved.

Referring to fig. 3, 4 and 7, the body 11 of the connector 1 further includes a side portion 113, the side portion 113 is disposed around the periphery of the body 11, the side portion 113 is disposed protruding from the body 11 toward the stator assembly 2, and the side portion 113 can abut against the inner peripheral surface of the second casing 30 of the pump casing to provide support for the driving assembly 70. The side portion 113 includes a plurality of extending portions 114 for abutting against the stator assembly 2 for limiting, the extending portions 114 extend from the side portion 113 to a side where the stator assembly 2 is located, and the extending portions 114 are disposed at intervals along the side portion 113, so that material can be saved, and of course, in other embodiments, the direct extending of the side portion 113 can also play the same role as the extending portions 114. Stator module 2's stator core 21's periphery is provided with a plurality of bellyings 25, and bellyings 25 sets up to the periphery arch from stator core 21, and the tip of bellyings 25 can cooperate with the tip butt of extension 114 to it is spacing to realize stator module 2 and the butt of connecting piece 1. Connecting piece 1 still includes joint portion 115, joint portion 115 takes shape in this body portion 11, joint portion 115 cooperates with stator module 2's block portion 24, it is spacing to realize stator module 2 and connecting piece 1's joint, joint portion 115 can be from this body portion 11's outer peripheral to this body portion 11 central sunken structure or the through-hole that link up this body portion 11, stator module 2's block portion 24's supporting part 241 has certain elasticity, block portion 24's supporting part 241 passes joint portion 115, and through the fixed connecting piece 1 of lower surface 111 butt cooperation of hook portion 242 and this body portion 11, can make things convenient for being connected of stator module 2 and connecting piece 1 like this, make things convenient for the dismouting.

Referring to fig. 8, the connector 1 further includes a rib 116, and the rib 116 protrudes from the body 11 toward the stator assembly. The reinforcing ribs 116 comprise circumferential reinforcing ribs 117 and radial reinforcing ribs 118, the circumferential reinforcing ribs comprise at least one layer of approximately annular protrusions which can be circular, square or other shapes, the radial reinforcing ribs are approximately distributed along the radial direction of the body part, the circumferential reinforcing ribs and the radial reinforcing ribs are connected through injection molding, and the stability of the structure of the connecting piece can be improved by arranging the reinforcing ribs 116.

Referring to fig. 2 and 7, the connecting member 1 further includes a plurality of limiting bodies 7, and the limiting bodies 7 are disposed in a protruding manner from the body portion to the direction of the circuit board. In this embodiment, the position-limiting body 7 includes a first position-limiting body 71, a second position-limiting body 72 and a third position-limiting body 73, the position-limiting body 7 has a position-limiting column 74 and a reinforcing portion 75, and the reinforcing portion 75 is disposed on the periphery of the position-limiting column 74, so that the strength of the position-limiting column 74 can be improved. Taking the first stopper as an example, in this embodiment, the first stopper 71 has three reinforcing portions 75, and the second stopper 72 and the third stopper 73 have two reinforcing portions, respectively. The upper end of reinforcement 75 has butt face portion 76, and the height of butt face portion 76 is less than the up end of spacing post 74, and butt face portion 76 can cooperate with the butt of circuit board 3, provides the support for an end face of circuit board 3. Referring to fig. 2 and 7, the circuit board 3 has a mounting hole 32 corresponding to the limiting post 74, after the limiting post passes through the corresponding mounting hole 32 on the circuit board 3, one surface of the circuit board 3 abuts against the abutting surface part 76 of the limiting part 7, and the other surface fixes the circuit board 3 by hot-melting and riveting the limiting post 74, so that the relative limitation of the circuit board 3 and the connecting piece 1 is realized. In other embodiments, the number of the stopper portion 7 may not be limited to three.

Referring to fig. 4 and 6, the stator assembly 2 further includes a fixing portion 125 and a fixing member 126, for electrically connecting the partial windings 231 drawn out from the windings 23, so as to electrically connect the windings 23, in this embodiment, the fixing portion 125 is formed in the insulating portion 22 of the stator assembly 2, and protrudes from the insulating portion 22 toward the direction of the connecting member 1, the fixing portion 125 is similar to the structure of the partial connecting terminal mounting portion 12, and the fixing member 126 is the same as or similar to the connecting terminal 4, so as to reduce the development cost, and the fixing portion 125 is also provided with a clamping portion and a guiding portion, thereby facilitating the routing of the windings. Of course, in other embodiments, the fixing member 126 may have other forms, for example, the fixing member 126 may be a structure that omits the second end portion 46 of the connection terminal 4, which may also reduce the cost.

Referring to fig. 8, the driving assembly 70 is further provided with a grounding strip 8, the connecting member 1 is provided with a structure for fixing the grounding strip 8, and the stator core 21 of the stator assembly 2 can be electrically connected with the ground end of the circuit board 3 through the grounding strip 8, which is beneficial to optimizing the EMC performance of the electric pump.

Referring to fig. 10 and 11, in a second embodiment of the driving assembly 70, the connecting element 1a further includes a limiting body 11a and a fastening portion 12a, the limiting body 11a is similar to the limiting body of the first embodiment in structure, the fastening portion 12a includes a fastening portion 13a and a bracket 14a, the height of the bracket 14a is smaller than the height of the fastening portion 13a, the fastening portion 13a includes a supporting portion 15a and a fastening portion 16a, the fastening portion 16a can limit one end surface of the circuit board, the bracket 14a is in abutting engagement with the lower end surface of the circuit board to limit the other end surface of the circuit board, and the fastening portion 12 can further fix the circuit board, thereby improving the structural stability. Compared with the first embodiment, the clamping part 17a is arranged to guide the winding, the clamping part 17a is provided with a semicircular groove, the conducting wire can be fixed, the structure is relatively simple, and the processing amount can be reduced. Compared with the first embodiment, the structure can be relatively simplified and the amount of processing can be reduced without providing the opening 14.

It should be noted that: the above embodiments are only used for illustrating the present invention and not for limiting the technical solutions described in the present invention, and although the present invention has been described in detail with reference to the above embodiments, it should be understood by those skilled in the art that the technical solutions and modifications thereof without departing from the spirit and scope of the present invention can be modified or replaced by other technical solutions and modifications by those skilled in the art.

Claims

1. An electric pump comprising a pump housing, an isolation sleeve, a rotor assembly, and a drive assembly, the pump housing capable of forming a pump interior cavity, the pump interior cavity comprising a first cavity and a second cavity, the first cavity and the second cavity not being in communication, the first cavity located inside the isolation sleeve, the second cavity located outside the isolation sleeve, at least a portion of the rotor assembly located in the first cavity, and at least a portion of the drive assembly located in the second cavity; the method is characterized in that: the driving assembly comprises a connecting piece, a connecting terminal, a stator assembly and a circuit board, wherein the connecting piece and the connecting terminal connect the circuit board and the stator assembly into a whole, and the connecting piece comprises a body part, a first groove and a connecting terminal mounting part; the first groove is a notch formed from the outer periphery of the body part, the stator assembly comprises a winding, a first part of the winding is positioned on the upper side of the body part, a second part of the winding is positioned on the lower side of the body part, and a connecting part between the first part and the second part is positioned in the first groove; the connecting terminal installation department protrusion in this somatic part, connecting terminal with the connecting terminal installation department is pegged graft, the second portion includes wire end, part wire end joint in connecting terminal's first end with between the connecting terminal installation department, wire end is in connecting terminal's first end with between the connecting terminal installation department can with connecting terminal electricity is connected, connecting terminal's second end with circuit board electricity is connected.

2. The electric pump of claim 1, wherein: the connecting terminal installation part comprises an installation cavity, a first end part of the connecting terminal comprises a first branch part and a second branch part, the distance between the first branch part and the second branch part is smaller than the wire diameter of the wire winding, an installation groove is formed in the connecting terminal installation part, the installation groove penetrates through the connecting terminal installation part and is perpendicular to the extending direction of the installation cavity, part of the wire winding end part is located in the installation groove, the first end part of the connecting terminal is inserted into the installation cavity, the wire winding end part is located between the first branch part and the second branch part and is tightly matched with the first branch part and the second branch part, and the wire winding end part is electrically connected with the first branch part and the second branch part in the installation groove; the second end of the connecting terminal is connected with the circuit board through clamping.

3. The electric pump of claim 2, wherein: the connecting piece further comprises a limiting portion protruding out of the body portion, the limiting portion is the same as the protruding direction of the connecting terminal installation portion, the second portion is limited by the limiting portion, and the end portion of the winding wire extends in the extending direction of the installation groove.

4. The electric pump of claim 3, wherein: spacing portion includes first spacing portion, first spacing portion be located first groove end with between the connecting terminal installation department, wire-wound second part be spacing in the outer peripheral face of first spacing portion.

5. The electric pump of claim 4, wherein: the limiting part further comprises a second limiting part, the second limiting part comprises a first part and a second part, the first part and the second part are both formed in the columnar body of the connecting piece, the first part and the second part are separated by a preset distance, and part of the second part is located between the first part and the second part.

6. The electric pump according to any one of claims 3 to 5, characterized in that: the connecting piece further comprises a guiding part, the guiding part is located between the first groove and the limiting part, and part of the second part is guided by the periphery of the guiding part and then winds around the limiting part.

7. The electric pump of claim 6, wherein: the connecting piece still includes first clamping part, first clamping part is located keeping away from of connecting terminal installation department one side of spacing portion, wire winding terminal extension is located first clamping part, the connecting piece is formed with the opening, the opening compares first clamping part is kept away from the connecting terminal installation department, the opening runs through the upper and lower surface of connecting piece.

8. The electric pump of claim 7, wherein: the connecting piece still includes the second clamping part, the second clamping part is located first clamping part with between the opening, first clamping part with connect through the depressed part between the second clamping part.

9. The electric pump of any of claims 1-5 or 7, wherein: stator module still includes stator core and insulating part, insulating part with stator core moulds plastics fixedly, insulating part has block portion, block portion includes supporting part and hook portion, hook portion is located the top of supporting part, the connecting piece still includes joint portion, joint portion is from the periphery of this somatic part body this somatic part central authorities are sunken or are link up the through-hole of this somatic part, the supporting part passes joint portion and through hook portion with this somatic part cooperation is connected stator module with the connecting piece.

10. The electric pump of claim 6, wherein: stator module still includes stator core and insulating part, insulating part with stator core moulds plastics fixedly, insulating part has block portion, block portion includes supporting part and hook portion, hook portion is located the top of supporting part, the connecting piece still includes joint portion, joint portion is from the periphery of this somatic part body this somatic part central authorities are sunken or are link up the through-hole of this somatic part, the supporting part passes joint portion and through hook portion with this somatic part cooperation is connected stator module with the connecting piece.

11. The electric pump of claim 9, wherein: the connecting piece still includes spacing post and rib, the rib set up in the periphery of spacing post, the upper end of rib has butt portion, the circuit board has the mounting hole, spacing post passes the mounting hole, the circuit board support in butt portion and through right the upper end hot melt riveting of spacing post with the circuit board.

12. The electric pump of claim 10, wherein: the connecting piece still includes spacing post and rib, the rib set up in the periphery of spacing post, the upper end of rib has butt portion, the circuit board has the mounting hole, spacing post passes the mounting hole, the circuit board support in butt portion and through right the upper end hot melt riveting of spacing post with the circuit board.