CN113007361A

CN113007361A - Manufacturing method of electric valve

Info

Publication number: CN113007361A
Application number: CN201911323144.XA
Authority: CN
Inventors: 不公告发明人
Original assignee: Zhejiang Sanhua Intelligent Controls Co Ltd
Current assignee: Zhejiang Sanhua Intelligent Controls Co Ltd
Priority date: 2019-12-20
Filing date: 2019-12-20
Publication date: 2021-06-22

Abstract

A method for manufacturing an electric valve comprises the steps of connecting a motor assembly with a valve core assembly in a threaded mode, arranging the motor assembly in an accommodating cavity formed by a housing, fixedly connecting or integrally forming a connecting piece with a valve core seat, arranging the connecting piece in the accommodating cavity and abutting against the motor assembly, and sealing and fixing the connecting piece and the housing, so that the valve core component and the motor assembly are assembled, and the assembling process is simple.

Description

Manufacturing method of electric valve

[ technical field ] A method for producing a semiconductor device

The present invention relates to a method for manufacturing an electrically operated valve.

[ background of the invention ]

In an automobile air conditioning system, in order to improve the flow control precision of a working medium, an electric valve is adopted as a throttling element, the electric valve comprises a motor component and a valve core component, and how to assemble the valve core component and the motor component is a technical problem.

[ summary of the invention ]

The invention aims to provide a manufacturing method of an electric valve, which is beneficial to simplifying the assembly of a valve core component and a motor assembly.

In order to achieve the purpose, the invention adopts the following technical scheme: a manufacturing method of an electric valve, the electric valve comprises a control part, a driving part, a valve core part and a valve seat, the driving part comprises a motor assembly and a cover shell, the valve core part comprises a connecting piece, a valve core assembly and a valve core seat, and the manufacturing method of the electric valve comprises the following steps:

s1: connecting the motor assembly with the valve core assembly in a threaded manner, wherein the motor assembly is arranged in an accommodating cavity formed by the housing;

s2: the connecting piece is fixedly connected with the valve core seat or integrally processed and formed with the valve core seat, part of the connecting piece is arranged in the containing cavity, the connecting piece is abutted against the motor assembly, and the connecting piece is fixed with the housing in a sealing manner.

S3: connecting the first assembly formed in step S2 with the valve seat;

s4: connecting the second assembly formed in step S3 with the control component.

The invention provides a manufacturing method of an electric valve, which comprises the steps of connecting a motor component with a valve core component in a threaded manner, arranging the motor component in an accommodating cavity formed by a housing, fixedly connecting or integrally forming a connecting piece with a valve core seat, arranging the connecting piece in the accommodating cavity and abutting against the motor component, and sealing and fixing the connecting piece and the housing, so that the assembly of a valve core component and the motor component is realized, and the assembly process is simpler.

[ description of the drawings ]

Figure 1 is a schematic cross-sectional view of a first embodiment of an electrically operated valve;

FIG. 2 is a schematic cross-sectional view of the outer housing of FIG. 1;

FIG. 3 is a perspective view of the terminal post of FIG. 1;

FIG. 4 is a schematic cross-sectional view of the post of FIG. 3;

FIG. 5 is a perspective view of the housing of FIG. 1;

FIG. 6 is a cross-sectional structural view of the enclosure of FIG. 5;

FIG. 7 is a schematic perspective view of the housing of FIG. 1 in another orientation;

FIG. 8 is a perspective view of the motor assembly of FIG. 1;

FIG. 9 is a cross-sectional structural schematic of the motor assembly of FIG. 8;

FIG. 10 is a perspective view of the connector of FIG. 1;

FIG. 11 is a cross-sectional structural view of the connector of FIG. 10;

FIG. 12 is a perspective view of the valve spool assembly of FIG. 1;

FIG. 13 is a cross-sectional structural schematic of the valve core assembly of FIG. 12;

FIG. 14 is a cross-sectional structural view of the valve seat of FIG. 1;

figure 15 is an enlarged partial cross-sectional view of the electrically operated valve of figure 1;

figure 16 is a cross-sectional view of a second embodiment of the electrically operated valve;

FIG. 17 is a perspective view of the connector of FIG. 16;

FIG. 18 is a cross-sectional structural view of the connector of FIG. 17;

figure 19 is an enlarged partial cross-sectional view of the electrically operated valve of figure 16;

figure 20 is a schematic cross-sectional view of a third embodiment of the electrically operated valve;

FIG. 21 is a schematic cross-sectional view of the shroud and post combination of FIG. 20;

figure 22 is a first schematic view of a part of the assembly process of the first or second embodiment of the electric valve;

figure 23 is a second schematic view of a part of the assembly process of the first embodiment or the second embodiment of the electric valve;

figure 24 is a schematic view of a part of the assembly process of a third embodiment of an electrically operated valve;

figure 25 is a second schematic view of a third embodiment of a part assembly process for an electrically operated valve.

[ detailed description ] embodiments

The invention will be further described with reference to the following figures and specific examples:

referring to fig. 1, the electric valve 100 includes a control component 1, a driving component 2, a valve core component 3 and a valve seat 4, wherein the control component 1 is connected with the driving component 2 and can be electrically and/or signal connected, the driving component 2 is connected with the valve seat 4, at least part of the valve core component 3 is located in a mounting cavity formed by the valve seat 4, and the valve core component 3 is connected with the driving component 2.

Referring to fig. 1, the control component 1 includes an outer shell 11, a circuit board 12 and a cover plate 13, the outer shell 11 and the cover plate 13 are respectively injection-molded and fixedly connected, a first accommodating cavity 111 is formed between the outer shell 11 or the outer shell 11 and the cover plate 13, and the circuit board 12 is located in the first accommodating cavity 111; the control component 1 further comprises a first interface part 14 and a first contact pin 15, the first interface part 14 and the outer shell 11 are integrally formed through injection molding, the first interface part 14 forms a second accommodating cavity 141, the middle part of the first contact pin 15 and the outer shell 11 are fixed through injection molding, one end of the first contact pin 15 is located in the first accommodating cavity 111 and is electrically connected and/or signal connected with the circuit board 12, and the other end of the first contact pin 15 is located in the second accommodating cavity 141 and is electrically connected and/or signal connected with the outside. Referring to fig. 2, the outer case 11 further includes a third mounting portion 112, the third mounting portion 112 forming a third mounting cavity 113, the third mounting cavity 113 being disposed in communication with the first accommodating cavity 111, the third mounting portion 112 including a third step portion 114 and a second step portion 115, the second step portion 115 being disposed closer to the first accommodating cavity 111 than the third step portion 114.

Referring to fig. 1, the driving part 2 includes a terminal post 21, a housing 22, a motor assembly 23, and a compression nut 24. The motor assembly 23 is positioned in the housing 22, one end of the terminal 21 abuts against the housing 22, and the terminal 21 is in threaded connection with the compression nut 24. Referring to fig. 3 and 4, the terminal 21 includes a cylinder 211, a second pin 212 and a glass sintered body 213, the cylinder 211 and the second pin 212 are used as inserts and sintered to form the glass sintered body 213, so that the cylinder 211, the second pin 212 and the glass sintered body 213 are connected into a whole, the glass sintered body 213 has a better pressure-bearing capacity and a good sealing performance, and the glass sintered body 213 enables the terminal 21 to better bear the pressure of a working medium and is beneficial to preventing the working medium from entering the first accommodating cavity 111 through the terminal 21 to damage the circuit board 12. The cylinder 211 comprises a first side portion 2111, a first flange portion 2112, a first positioning surface 2113 and a positioning hole 2114, wherein an external thread is formed on the outer peripheral surface of the first side portion 2111, the first positioning surface 2113 is a plane, the first flange portion 2112 is recessed inwards to form a first sealing groove 2115 along the axial direction of the cylinder 211, the first sealing groove 2115 forms a first groove cavity, and two ends of the second pin 212 extend out of the cylinder 211.

Referring to fig. 1, a cover 22 is disposed at the outer periphery of a motor assembly 23, one end of the cover 22 is fixedly connected to the control part 1, and the other end of the cover 22 is fixedly connected to the valve seat 4. Specifically, referring to fig. 5 and 6, the housing 22 includes a first end portion 221, the first end portion 221 is provided with a first through hole 222, the housing 22 forms a receiving cavity 223, the first through hole 222 is provided to communicate with the receiving cavity 223, and a side wall surface forming the first through hole 222 has a first mating surface 224. Referring to fig. 1, the first end 221 of the cover 22 is located in the third mounting cavity 113, and the first end 221 abuts against the third step 114; the partial terminal 21 is located in the housing cavity 223 of the housing 22, and the partial terminal 21 located in the housing cavity 223 abuts against the inside of the first end 221 through the first flange portion 2112; part of the terminal post 21 passes through the first through hole 222 and the first end 221 and is located in the first accommodating cavity 111, and at least part of the first side 2111 of the terminal post 21 is located in the first accommodating cavity 111; the first matching surface 224 is attached to the first positioning surface 2213, and is used for positioning and/or rotationally limiting the terminal 21; the compression nut 24 is located in the first accommodating cavity 111, the compression nut 24 is sleeved on the radial periphery of the first side portion 2111, an inner peripheral surface of the compression nut 24 is provided with an internal thread matched with the external thread of the first side portion 2111, the compression nut 24 is rotated to enable the compression nut 24 to be in threaded fit with the first side portion 2221, and the compression nut 24 and the first flange portion 2112 press the first end portion 221 of the housing 22 and the outer shell 11, so that the housing 22 is fixedly connected with the control component 1. Further, sealing arrangements can be further performed between the outer shell 11 and the housing 22 and between the terminal 21 and the housing 22, specifically, referring to fig. 1, the electric valve 100 includes a first sealing ring 5 and a second sealing ring 6, a part of the first sealing ring 5 is located in the first groove cavity and abuts against the first sealing groove 2115 and the first end 221, and the lower side surface of the first end 221 and the first sealing groove 2115 press the first sealing ring 5 to be in an elastic deformation state; the second gasket 6 is located between the second stepped portion 115 and the upper side of the first end portion 221, and the second stepped portion 115 and the first end portion 221 press the second gasket 6 to be in an elastic deformation state. The provision of the first seal ring 5 facilitates the prevention of the working medium from leaking out from the gap between the first end 221 of the housing 22 and the post 21; the provision of the second sealing ring 6 is advantageous to prevent moisture in the external environment from entering the first accommodating chamber 111 through the gap between the first end 221 of the casing 22 and the outer housing 11, and damaging the circuit board 11. The other end of the cover 22 is fixedly connected to the valve seat 4 by a screw. Of course, as another embodiment, the cover 22 and the control component 1 may be integrally injection molded, specifically, the cover 22 and the outer housing 11 are integrally injection molded, and the other end of the cover 22 is fixedly connected to the valve seat 4 by a screw. Referring to fig. 7, the housing 22 further includes a first stepped portion 225, and the first stepped portion 225 is provided with first positioning grooves 2251 recessed inward in an axial direction of the housing 22, where the number of the first positioning grooves 2251 is at least 1, and in this embodiment, the number of the first positioning grooves 2251 is two and is symmetrically arranged.

Referring to fig. 8 and 9, the motor assembly 23 includes an electrical connection 231, a motor housing 232, a stator assembly 233, a rotor assembly 234, and a valve stem 235, wherein the valve stem 235 is fixedly connected with the rotor assembly 234, and in the present embodiment, the valve stem 235 is fixed with the rotor assembly 234 by interference fit. The stator assembly 233 is located at the outer periphery of the rotor assembly 234, the motor housing 232 is located at the outer periphery of the stator assembly 233, the motor housing 232 is fixedly connected with the electric connection portion 231, and in the present embodiment, the motor housing 232 and the electric connection portion 231 are fixed by crimping. The motor housing 232 and the electrical connection 231 together enclose the stator assembly 233 and the rotor assembly 234 and provide a seal between the stator assembly 233 and the rotor assembly 234, which is advantageous for preventing the motor assembly 23 from being damaged by the infiltration of working medium. One end of the valve rod 235 is located in a closed space formed by the motor housing 232 and the electric connection portion 231 and is abutted to the electric connection portion 231, the other end of the valve rod 235 is located outside the motor housing 232, and an external thread is arranged at one end of the valve rod 235 located outside the motor housing 232. The electrical connection portions 231 include patch holes 2311 and first protrusions 2312, and the number of patch holes 2311 is the same as the number of second pins 212. The motor assembly 23 further includes a connecting plate 236, and the connecting plate 236 is fixedly connected to the motor housing 232, in this embodiment, the connecting plate 236 is fixedly connected to the motor housing 232 by riveting. The radial diameter of connecting plate 236 is greater than motor housing 232's radial diameter, and along motor element 23's radial direction, connecting plate 236 protrusion motor housing 232 sets up, and connecting plate 236 is including the portion 2361 of bending, and the portion 2361 of bending is the same with first locating slot 2221's quantity, and the portion 2361 symmetry of bending sets up, and the portion 2361 of bending is used for coordinating the location with first locating slot 2251.

Referring to fig. 1, a part of the motor assembly 23 is located in the accommodating cavity 223, the first protrusion 2312 of the electrical connection portion 231 is located in cooperation with the locating hole 2114 of the terminal 21, the connection plate 236 abuts against the first step portion 225, the bending portion 2361 is buckled into the first locating groove 2251, and the bending portion 2361 is located in cooperation with the first locating groove 2251. The second pin 212 is located at one end of the accommodating cavity 223, is inserted and fixed with the plug socket 2311 of the electrical connection portion 231, and can be electrically connected and/or signal connected with the stator assembly 233, and the second pin 212 is located at the other end of the first accommodating cavity 111, is inserted and fixed with the circuit board 12, and can be electrically connected and/or signal connected with the circuit board 12. Thus, the circuit board 12 is electrically and/or signal connected to the stator assembly 233 through the second contact pin 212, and under the action of the circuit board 12, the stator assembly 233 generates an excitation magnetic field, and the rotor assembly 234 drives the valve rod 235 to rotate together under the excitation of the magnetic field. The first matching surface 224 and the first positioning surface 2213 are arranged for positioning in an attaching manner, the first protruding portion 2312 and the positioning hole 2114 are positioned in a matching manner, and the bending portion 2361 and the first positioning groove 2251 are positioned in a matching manner, so that the electrical connection and/or signal connection accuracy between the second insertion pin 212 and the circuit board 12 and between the second insertion pin 212 and the insertion hole 2311 is facilitated. The motor assembly 23 is disposed in the accommodating cavity 223, so that when the working medium enters the accommodating cavity 223, the motor housing 232 of the motor assembly 23 can contact with the working medium, and under the action of the working medium, the heat dissipation of the motor assembly 23 is facilitated, and further, the heat dissipation of the stator assembly 233 is facilitated.

Referring to fig. 1, the cartridge component 3 includes a connector 31, a cartridge seat 32, and a cartridge assembly 33. The connecting member 31 includes the second flange portion 311, and part of the connecting member 31 is located in the accommodating cavity 223, specifically, at least part of the second flange portion 311 is located in the accommodating cavity 223, the second flange portion 311 is in interference fit with the housing 22, and the second flange portion 311 abuts against the connecting plate 236, so that the motor assembly 23 is limited in the axial direction by the positioning hole 2114 and the second flange portion 311, the motor assembly 23 is positioned in the circumferential direction by the first positioning groove 2251, and the motor assembly 23 is limited in the axial direction and the circumferential direction, thereby fixing the motor assembly 23. Further, in order to prevent the working medium from leaking to the outside from the fitting gap between the second flange portion 311 of the connecting member 31 and the housing case 22, a weld seal is also performed between the periphery of the second flange portion 311 and the housing case 22. Referring to fig. 10 and 11, the connecting member 31 further includes a first mounting portion 312, the first mounting portion 312 forms a first mounting cavity 313, the first mounting cavity 313 is disposed through the connecting member 31, the first mounting portion 312 includes a fourth stepped portion 3121, a fitting portion 3122, and a fitting portion 3123, the fitting portion 3122 is located between the fourth stepped portion 3121 and the fitting portion 3123, the fourth stepped portion 3121 is disposed closer to an upper end surface of the connecting member 31 than the fitting portion 3122, an end of the connecting member 31 close to the motor assembly 23 is defined as an upper end surface, the fitting portion 3122 includes a fitting portion side surface 3124, and the fitting portion side surface 3124 is a rectangular plane. Referring to fig. 1, the valve core seat 32 is fixedly connected to the connecting member 31, and in this embodiment, the valve core seat 32 is in interference fit with the connecting member 31, specifically, the fitting portion 3123 of the valve core seat 32 is in interference fit with the connecting member 31. Of course, as another embodiment, the valve core seat 32 and the connecting piece 31 may also be integrally formed. The valve core seat 32 includes at least one flow hole 321 and a valve port 322, the number of the flow holes 321 is at least one, and the flow holes 321 are communicated with the valve port 322. Referring to fig. 12 and 13, the valve core assembly 33 includes a valve core 331 and a nut 332, and the valve core 331 and the nut 332 are fixed by injection molding, specifically, the valve core 331 is used as an injection molding insert and the nut 332 is integrally formed by injection molding. The nut 332 comprises a threaded hole 3321, an internal thread matched with the external thread of the valve rod 235 is arranged on the side wall surface of the threaded hole 3321, and the valve rod 235 is connected with the valve core assembly 33 through the nut 332 in a threaded matching mode. The nut 332 further includes a position-limiting portion 3322 and a balance groove 3323, the position-limiting portion 3322 is a non-rotating body, and the position-limiting portion 3322 may have various structures as long as it can prevent the valve core assembly 33 from rotating circumferentially. In this embodiment, the number of the position-limiting portions 3322 is four, the number of the balance grooves 3323 is 4, the balance grooves 3323 are located between every two position-limiting portions 3322, each position-limiting portion 3323 includes a position-limiting portion side surface 3324, and each position-limiting portion side surface 3324 is a rectangular plane.

Referring to fig. 1, a part of the motor assembly 23 is located in the first mounting cavity 313 of the connecting member 31, a part of the valve core assembly 33 is located in the first mounting cavity 313, the valve rod 235 is in threaded connection with the valve core assembly 33 through the nut 332, the limiting portion 3322 of the nut 332 is in fit limiting with the fitting portion 3122 of the first mounting cavity 312, specifically, the limiting portion side 3324 is in fit arrangement with the fitting portion side 3124, so that circumferential rotation of the valve core assembly 33 in the movement process can be prevented. Because rotor subassembly 234 drives valve rod 235 and rotate circumferentially together under the magnetic field excitation of stator subassembly 233, and valve rod 235 and case subassembly 33 threaded connection, because case subassembly 33 carries out circumference spacing through spacing portion 3322 and cooperation portion 3122 again, promptly the case subassembly 33 can't rotate circumferentially together along with valve rod 235, like this, under the effect of screw thread, case subassembly 33 can be along the up-and-down reciprocating motion of the axial direction of first installation cavity 313 to make case 331 be close to or keep away from valve port 322 and adjust the aperture of valve port 322. In order to enable the valve core assembly 33 to reciprocate up and down along the axial direction of the first mounting cavity 313, namely along the axial direction of the first mounting cavity 313, the height H of the arrangement matching portion 3122 is greater than the height L of the limiting portion 3322; defining the axial direction along the first mounting cavity 313, the movement of the valve core assembly 33 away from the valve port 322 is an upward movement, the movement of the valve core assembly 33 close to the valve port 322 is a downward movement, the valve core assembly 33 is limited by the motor housing 232 during the upward movement, and the valve core assembly 33 is limited by the valve port 322 during the downward movement.

Referring to fig. 14, the valve seat 4 includes a first port 41, a second port 42, a second mounting portion 43, and a first passage 44, the second mounting portion 43 forming a second mounting cavity 45, the first passage 44 communicating the first port 41 and the second port 42 through the second mounting cavity 45. The second mounting portion 43 includes a fifth step portion 431, and by setting an opening distance of the fifth step portion 431 to the second mounting cavity 45 in advance, a length of the valve body member 3 protruding into the second mounting cavity 45 can be controlled. In this embodiment, the first port 41 and the second port 42 are located on different sides of the valve seat 4, the opening of the second mounting cavity 45 is located on another side of the valve seat 4, and the three sides are respectively located on different sides of the valve seat 4, which is beneficial to avoiding interference and improving the utilization rate of the valve seat 4.

Referring to fig. 1, part of the spool member 3 is located in the second mounting cavity 45, and the spool seat 32 abuts against the fifth step 431, and at this time, the first channel 44 can communicate the first port 41 and the second port 42 through the valve port 322. Further, a sealing arrangement is further provided between the valve core seat 32 and the second mounting portion 43, which is beneficial to preventing the working medium from leaking from a fit clearance between the valve core seat 32 and the second mounting portion 43, thereby being beneficial to ensuring the partition of the working medium in the first channel 44 when the valve port 322 is abutted against the valve core 331, that is, when the valve port 322 is closed. The connecting piece 31 is fixedly connected with the casing 22, the valve core component 3 extends into the second mounting cavity 45, and the driving component 2 is fixedly connected with the valve seat 4 through a screw. The valve core component 3 and the valve seat 4 are arranged in a sealing manner, specifically, the electric valve 100 further includes a third sealing ring 7, the third sealing ring 7 is sleeved on the radial periphery of the connecting piece 31, the third sealing ring 7 is located between the second flange portion 311 of the connecting piece 31 and the opening side of the second mounting cavity 45 of the valve seat 4, and the third sealing ring 7 is pressed between the second flange portion 311 and the opening side of the second mounting cavity 45 of the valve seat 4 and is in an elastic deformation state through the screw fit of the driving component 2 and the valve seat 4. The provision of the third sealing ring 7 is advantageous in preventing the working medium from leaking out from the gap between the valve seat 4 and the connecting piece 31. As another embodiment, a sixth stepped portion may be provided on the opening side of the second mounting cavity 45, or a sixth stepped portion may be provided on the second mounting portion 43, and the third seal 7 may be elastically deformed between the sixth stepped portion and the second flange portion 311.

Referring to fig. 11, the connecting member 31 further includes a balance hole 314, the balance hole 314 is disposed through the connecting member 31, the balance hole 314 is not directly communicated with the first mounting cavity 313, and the balance hole 314 is disposed to facilitate balancing of working medium pressures at two ends of the valve core assembly 33, so that the valve core assembly 33 can operate smoothly. Specifically, referring to fig. 15, as shown by the arrow in fig. 15, a part of the working medium in the second mounting cavity 45 passes through the balance hole 314, enters the first mounting cavity 313 along the abutting gap between the connecting member 31 and the motor assembly 23, and is located at one end of the valve core assembly 33; part of the working medium in the first installation cavity 45 is located at the other end of the valve core assembly 33 through the flow hole 321, so that the pressures of the working medium at the two ends of the valve core assembly 33 are balanced, the influence of the pressure difference of the working medium at the two ends of the valve core assembly 33 on the movement of the valve core assembly 33 is favorably reduced, and the valve core assembly 33 can move smoothly.

Referring to fig. 16 to 19, in the electric valve of the second embodiment, compared to the first embodiment, in the second embodiment, referring to fig. 17 and 18, the first mounting portion 312 further includes an opening portion 3125, the opening portion 3125 is formed with an open groove 3126, the open groove 3126 is provided in communication with the first mounting cavity 313, one end of the opening portion 3125 is provided flush with the fourth stepped portion 3121, and the other end of the opening portion 3125 is provided flush with the upper end surface of the connecting piece 31 in the axial direction of the first mounting cavity 313. The link 31 further includes a balancing hole 314 ', the balancing hole 314' communicating with the open groove 3126. Referring to fig. 19, in the second embodiment, a gap is left between the motor housing 232 located in the first mounting cavity 313 and the fourth stepped portion 3121 by setting the opening distance from the fourth stepped portion 3121 of the first mounting portion 312 to the first mounting cavity 313, so that the second embodiment can balance the pressure of the working medium between the first mounting cavity 313 and the second mounting cavity 45 more quickly than the first embodiment, and thus the valve core assembly 33 can operate smoothly. Specifically, as shown in the arrow direction in fig. 19, part of the working medium in the second mounting cavity 45 enters the open groove 3126 through the balance hole 314', and since the motor housing 232 in the first mounting cavity 313 is in clearance fit with the fourth stepped portion 3121, the working medium entering the open groove 3126 directly enters the first mounting cavity 313 along the fit clearance between the fourth stepped portion 3121 and the motor housing 232, and is located at one end of the valve core assembly 33; compared with the first embodiment in which the working medium enters the first mounting cavity 313 through the abutting gap between the connecting piece 31 and the motor assembly 23, the second embodiment can balance the working medium pressure at the two ends of the valve core assembly 33 more quickly, so that the valve core assembly 33 can operate smoothly.

Referring to fig. 20 and 21, in a third embodiment of the motor-operated valve, compared to the second embodiment, in the third embodiment, referring to fig. 21, a terminal 21' includes a second pin 212 and a glass sintered body 213, and the housing 22 and the second pin 212 are used as inserts to sinter the glass sintered body 213, so as to integrally connect the housing 22, the second pin 212 and the glass sintered body 213. Referring to fig. 20, the housing 22 is fixed to the outer housing 11 by injection molding, specifically, the housing 22 is used as an injection insert to form the outer housing 11 by injection molding, so that in the third embodiment, the housing 22 is fixed to the outer housing 11 by injection molding, and the housing 22 and the second pin 212 are integrally connected by the glass sintered body 213, which is beneficial to reducing the axial height of the electric valve 100, and at the same time, the number of the first seal ring 5 and the second seal ring 6 can be reduced, so that the assembly is simpler. In addition, referring to fig. 21, in the embodiment, the cover 22 further includes a limiting groove 226, and when the motor assembly 23 is assembled with the cover 22, the first protrusion 2312 is positioned in cooperation with the limiting groove 226, which is beneficial to accurately inserting the second pin 212 into the jack 2311.

Referring to fig. 22 to 23, the method of manufacturing the electric valve 100 according to the first and second embodiments will be further explained, and the method of manufacturing the electric valve 100 includes the following steps:

s1: the motor assembly 23 is in threaded connection with the valve core assembly 33, and the motor assembly 23 is arranged in the accommodating cavity 223 formed by the housing 22;

s2: the connecting piece 31 is fixedly connected with the valve core seat 32 or the connecting piece 31 and the valve core seat 32 are integrally formed, part of the connecting piece 31 is placed in the accommodating cavity 233, the connecting piece 31 is abutted against the motor assembly 23, and the connecting piece 31 and the housing 22 are fixed in a sealing manner;

s3: connecting the first assembly formed in step S2 with the valve seat 4;

s4: the second assembly formed at step S3 is connected to the control part 1.

Step S1 includes: the motor assembly 23 is connected with the valve core assembly 33 by screw threads, the terminal 21 is fixedly connected with the motor assembly 23 in a plugging manner and can be electrically and/or signal connected, specifically, the second pin 212 of the terminal 21 is fixedly connected with the plug socket 2311 of the motor assembly 23 in a plugging manner, the first protruding portion 2312 of the motor assembly 23 is positioned in a matching manner with the positioning hole 2114 of the terminal 21, so that the second pin 212 is accurately connected with the plug socket 2311 in a plugging manner, the first sealing ring 5 is arranged in the first groove cavity formed by the first flange portion 2112 of the terminal 21, the housing 22 is sleeved on the periphery of the motor assembly 23, the motor assembly 23 is arranged in the accommodating cavity 223 formed by the housing 22, part of the terminal 21 is arranged in the accommodating cavity 233, the first positioning surface 2113 of the terminal 21 is attached to the first matching surface 224 of the housing 22, the motor assembly 23 is positioned with the housing 22, the connecting plate 236 of the motor assembly 23 is, the bending portion 2361 of the connecting plate 236 is buckled into the first positioning groove 2251 disposed on the first step portion 225, and the bending portion 2361 is located by matching with the first positioning groove 2251.

Step S2 includes: the connector 31 and the valve core seat 32 can be in interference fit; or the connector 31 and the valve core seat 32 may be integrally formed. A part of the connecting piece 31 is placed in the accommodating cavity 233, the connecting piece 31 and the housing 22 can be in interference fit, the connecting piece 31 is abutted against the motor assembly 23, the periphery of the connecting piece 31 and the housing 22 are fixed in a sealing mode through welding, and a part of the valve core assembly 31 is placed in a first mounting cavity 313 formed by the connecting piece 31.

Step S3 includes: and (3) connecting the first assembly formed in the step S2 with the valve seat 4, specifically, sleeving the third sealing ring 7 on the radial periphery of the connecting piece 31 of the valve core component 3, placing part of the valve core component 3 in the second installation cavity 45 formed by the valve seat 4, and fixedly connecting the cover 22 with the valve seat 4 through screws to press the third sealing ring 7 between the connecting piece 31 and the valve seat 4.

Step S4 includes: connecting the second assembly formed in step S3 with the control component 1, specifically, placing the first end 221 of the casing 22 in the third installation cavity 113 formed by the outer housing 11 of the control component 1, placing the second sealing ring 6 on the radial outer periphery of the terminal post 21, placing part of the terminal post 21 in the first accommodation cavity 111 formed by the outer housing 11 through the third installation cavity 113, placing the second sealing ring 6 between the first end 221 and the second step 115 of the outer housing 11, placing the compression nut 24 in the first accommodation cavity 111, screwing the compression nut 24 to the first side portion of the terminal post 21 in the first accommodation cavity 111, placing the first end 221 of the compression casing 22222 between the first step of the outer housing 11 and the first flange portion 2112 of the terminal post 21, simultaneously, the first seal ring 5 is pressed between the first end part 221 and the first seal groove 2115, and the second seal ring 6 is pressed between the second step part 115 and the first end part 221. The circuit board 12 is disposed in the first accommodating cavity 111, the circuit board 12 is fixedly connected with the second pin 212 in a plugging manner and can be electrically and/or signal-connected, the circuit board 12 is fixedly connected with the first pin 15 injection-molded on the outer shell 11 in a plugging manner, and the circuit board 12 is electrically and/or signal-connected with the outside through the first pin 15. The cover plate 13 is fixedly connected with the outer shell 11.

Referring to fig. 24 to 25, in the third embodiment, the method of manufacturing the electric valve 100 includes the steps of:

step S1 is preceded by integrally connecting the housing 22 and the terminal 21 ', specifically, sintering the housing 22 and the second pin 212 as an insert to form a glass sintered body 213, integrally connecting the housing 22 and the second pin 212 through the glass sintered body 213, and then integrally injection-molding the housing body 11 with the housing body 11 and the housing body 11 injection-molded and fixed to the housing 22 by using the integral connection structure formed by the housing 22 and the terminal 21' as an injection-molded insert.

Step S1 includes: the motor assembly 23 is connected with the valve core assembly 33 in a threaded manner, the motor assembly 23 is placed in the accommodating cavity 223 formed by the casing 22, and the plug socket 2311 of the motor assembly 23 is fixedly connected with the second plug pin 212 in a plug-in manner and can be electrically and/or signal connected. Motor element 23 and housing 22 location setting, specifically, motor element 23's first bellying 2312 and housing 22's spacing groove 226 cooperation location, and motor element 23's connecting plate 236 and housing 22's first step portion 225 butt, the first locating slot 2251 that sets up on first step portion 225 is detained to the portion 2361 of bending of connecting plate 236, and the portion 2361 of bending and the first locating slot 2251 cooperation location.

Step S2 includes: the connector 31 and the valve core seat 32 can be in interference fit; or the connector 31 and the valve core seat 32 may be integrally formed. A part of the connecting piece 31 is placed in the accommodating cavity 233, the connecting piece 31 is in interference fit with the housing 22, the connecting piece 31 is abutted against the motor assembly 23, the periphery of the connecting piece 31 is welded and sealed with the housing 22, and a part of the valve core assembly 31 is placed in a first mounting cavity 313 formed by the connecting piece 31.

Step S4 includes: and (3) connecting the second assembly formed in the step S3 with the control component 1, specifically, placing the circuit board 12 in the first accommodating cavity 111 formed in the outer housing 11, inserting and fixing the circuit board 12 and the second pin 212 located in the first accommodating cavity 111 and being capable of electrically and/or signal connecting, inserting and fixing the circuit board 12 and the first pin 15 injection-molded on the outer housing 11, and electrically and/or signal connecting the circuit board 12 with the outside through the first pin 15. The cover plate 13 is fixedly connected with the outer shell 11.

The electric valve 100 thus manufactured is advantageous in that the assembly of the valve core member 3 and the motor assembly 23 is simple.

It should be noted that: although the present invention has been described in detail with reference to the above-mentioned embodiments, it should be understood by those skilled in the art that the present invention may be modified and equivalents may be substituted for those skilled in the art, and all technical solutions and modifications that do not depart from the spirit and scope of the present invention should be covered by the claims of the present invention.

Claims

1. A manufacturing method of an electric valve, the electric valve comprises a control part, a driving part, a valve core part and a valve seat, the driving part comprises a motor assembly and a cover shell, the valve core part comprises a connecting piece, a valve core assembly and a valve core seat, and the manufacturing method of the electric valve comprises the following steps:

S3: connecting the first assembly formed in step S2 with the valve seat;

2. The manufacturing method according to claim 1, characterized in that: the drive part comprises a wiring terminal, the wiring terminal comprises a positioning hole and a first positioning surface, the housing comprises a first matching surface, the motor assembly comprises a first protruding portion, the wiring terminal and the motor assembly are connected and fixed in a plugging mode in the step S1, the wiring terminal is arranged in the accommodating cavity, the first protruding portion is matched and positioned with the positioning hole, and the first positioning surface is attached to and arranged on the first matching surface.

3. The manufacturing method according to claim 1, characterized in that: the driving part comprises a binding post, the control part comprises an outer shell, the step S1 is preceded by integrally connecting the housing and the binding post through glass sintering, and the outer shell and the housing are fixed in an injection molding mode; the housing includes the spacing groove, motor element includes first bellying, include in step S1 motor element with the terminal connects the socket joint to fix, first bellying with the spacing groove cooperation location.

4. The manufacturing method according to claim 2 or 3, characterized in that: the motor element comprises a connecting plate, the connecting plate comprises a bending part, the housing comprises a first step part, a first positioning groove is formed in the first step part, the motor element is located and arranged in the housing in the step S1, the connecting plate is abutted to the first step part, the bending part is buckled into the first positioning groove, and the bending part is located in the first positioning groove in a matched mode.

5. The manufacturing method according to claim 4, characterized in that: the connecting piece comprises a first mounting part, a first mounting cavity is formed in the first mounting part, the step 2 comprises the interference fit of the connecting piece and the housing, the connecting piece is welded and fixed with the housing, and part of the valve core assembly is arranged in the first mounting cavity; the electrically operated valve includes the screw, the valve seat includes the second installation department, the second installation department forms the second installation cavity, include in step S3 with part the case part is arranged in the second installation cavity, the screw be used for with the housing with valve seat fixed connection.

6. The manufacturing method according to claim 5, characterized in that: the control component comprises a shell body, a circuit board, a first contact pin and a cover plate, the terminal comprises a second contact pin, the shell body forms a first accommodating cavity, the shell body comprises a third installation part, the third installation part forms a third installation cavity, the driving component comprises a compression nut, the shell body comprises a first end part, the step S4 comprises arranging the first end part in the third installation cavity, part of the terminal penetrates through the third installation cavity to be arranged in the first accommodating cavity, the compression nut is in threaded fit with the terminal, compresses the first end part between the third installation part and the terminal, the circuit board is arranged in the first accommodating cavity, the circuit board is fixedly connected with the second contact pin in an inserting way, and the circuit board is fixedly connected with the first contact pin in an inserting way, the circuit board is electrically connected and/or signal connected with the outside through the first contact pin, and the cover plate is fixedly connected with the outer shell.

7. The manufacturing method according to claim 5, characterized in that: the control unit includes circuit board, first contact pin and apron, the terminal includes the second contact pin, the shell body forms the first chamber that holds, includes in step S4 the circuit board is arranged in first chamber that holds, the circuit board with the second contact pin is pegged graft fixedly, the circuit board with first contact pin connects the plug and fixes, the circuit board passes through first contact pin is connected and/or signal connection with external electricity, the apron with shell body fixed connection.

8. The manufacturing method according to claim 6, characterized in that: the electric valve comprises a first sealing ring, a second sealing ring and a third sealing ring, the binding post comprises a first sealing groove, and the step S1 comprises the step of placing the first sealing ring in a first groove cavity formed by the first sealing groove; step S3 includes sleeving the third seal ring around the radial outer periphery of the connecting member, and the cover piece is fixedly connected to the valve seat via the screw, so as to press the third seal ring between the connecting member and the valve seat; step S4 includes including the second sealing washer cover is located the radial periphery of terminal, the second sealing washer is arranged in the third installation department with between the first end, the terminal with gland nut screw-thread fit compresses tightly first sealing washer in first sealed recess with between the first end, compress tightly the second sealing washer in the third installation department with between the first end.

9. The manufacturing method according to claim 7, characterized in that: the electric valve comprises a third sealing ring, step S3 includes sleeving the third sealing ring on the radial periphery of the connecting member, and the cover piece is fixedly connected with the valve seat through the screw to press the third sealing ring between the connecting member and the valve seat.