WO2023165331A1 - 螺母组件及电子膨胀阀 - Google Patents

螺母组件及电子膨胀阀 Download PDF

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Publication number
WO2023165331A1
WO2023165331A1 PCT/CN2023/076003 CN2023076003W WO2023165331A1 WO 2023165331 A1 WO2023165331 A1 WO 2023165331A1 CN 2023076003 W CN2023076003 W CN 2023076003W WO 2023165331 A1 WO2023165331 A1 WO 2023165331A1
Authority
WO
WIPO (PCT)
Prior art keywords
limiting
nut
connecting plate
groove
valve
Prior art date
Application number
PCT/CN2023/076003
Other languages
English (en)
French (fr)
Inventor
黄鸿峰
詹少军
赵俊
Original Assignee
浙江盾安人工环境股份有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from CN202210213276.2A external-priority patent/CN116733923A/zh
Priority claimed from CN202220475997.6U external-priority patent/CN217301485U/zh
Priority claimed from CN202220476651.8U external-priority patent/CN217177310U/zh
Priority claimed from CN202220483043.XU external-priority patent/CN217177316U/zh
Priority claimed from CN202220482293.1U external-priority patent/CN217177429U/zh
Priority claimed from CN202220481995.8U external-priority patent/CN217177311U/zh
Priority claimed from CN202210212550.4A external-priority patent/CN116733922A/zh
Priority claimed from CN202220483057.1U external-priority patent/CN217177317U/zh
Application filed by 浙江盾安人工环境股份有限公司 filed Critical 浙江盾安人工环境股份有限公司
Priority to KR1020247006817A priority Critical patent/KR20240033295A/ko
Publication of WO2023165331A1 publication Critical patent/WO2023165331A1/zh

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H25/00—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms
    • F16H25/18—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms for conveying or interconverting oscillating or reciprocating motions
    • F16H25/20—Screw mechanisms
    • F16H25/24—Elements essential to such mechanisms, e.g. screws, nuts
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
    • F16K1/02—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with screw-spindle
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
    • F16K1/32—Details

Definitions

  • the present application relates to the technical field of electronic expansion valves, in particular, to a nut assembly and an electronic expansion valve.
  • the connecting plate and the nut body are usually connected in a way of scarfing.
  • the connecting plate needs to be placed, resulting in low production efficiency.
  • the nut main body with connecting plate cannot be recycled for secondary use.
  • the present application provides a nut assembly and an electronic expansion valve to improve the production efficiency and structural strength of the nut assembly in the prior art.
  • the present application provides a nut assembly, including: a nut, the nut includes a nut body and a limiting plate connected to each other, and the radial dimension of the limiting plate is larger than the radial dimension of the nut main body.
  • the limiting plate or the nut body has a first limiting structure
  • the connecting plate has a second limiting structure
  • the first limiting structure and the second limiting structure are limitedly fitted to limit the connection plate and the nut on the circumference. Relative position up.
  • the first limiting structure includes a limiting boss arranged on the outer wall of the nut body
  • the second limiting structure includes a limiting groove arranged on the inner wall of the connecting plate, and the limiting boss is located in the limiting groove.
  • limiting bosses there are a plurality of limiting bosses, and the plurality of limiting bosses are arranged around the nut body, and there are a plurality of limiting grooves, and the plurality of limiting grooves and the plurality of limiting bosses are arranged in one-to-one correspondence.
  • the nut body includes a nut section, a transition section and a connecting section connected in sequence, the radial dimension of the connecting section is larger than the radial dimension of the nut section, the nut section has an internal thread, the connecting section is connected to the limit plate, and the connecting plate can be It is sleeved on the connecting section in a detachable manner.
  • an electronic expansion valve is provided.
  • the electronic expansion valve includes a valve body assembly and the above nut assembly, and the nut assembly is located in the valve body assembly.
  • valve body assembly includes a valve cover and a valve seat connected to each other, at least a part of the nut body is located in the cavity of the valve cover, the limiting plate is located in the cavity of the valve seat, and the outer side wall of the connecting plate is welded to the inner side wall of the valve seat.
  • valve seat has an opening
  • the connecting plate is arranged at the opening
  • the distance between the side of the connecting plate away from the valve seat cavity and the plane where the opening is located is L, L ⁇ 0.02mm
  • the thickness of the connecting plate is t, L ⁇ 0.4t.
  • the connecting plate has a balance hole or a balance groove, and the cavity of the valve seat and the valve cover communicate through the balance hole or the balance groove.
  • the electronic expansion valve also includes a guide sleeve and a valve needle assembly
  • the nut has a positioning hole, and a stop surface is provided in the positioning hole, one end of the guide sleeve penetrates into the positioning hole, the end surface of the guide sleeve abuts against the stop surface, and the valve needle
  • the assembly and the nut body are threaded, and the needle assembly passes through the guide sleeve.
  • the inner wall of the valve seat has a positioning boss, and the positioning boss has a valve port, and the positioning boss penetrates the end of the guide sleeve away from the nut, and the positioning boss, the guide sleeve, the positioning hole and the valve needle assembly are coaxially arranged.
  • a nut assembly including: a nut, the nut includes a nut body and a limiting plate connected to each other, the radial dimension of the limiting plate is larger than the radial dimension of the nut main body; the connecting plate, the connecting plate It is detachably sleeved on the nut main body, and the connecting plate and the limiting plate abut against each other.
  • the nut body and the connection plate of the nut assembly are separately arranged, so that the connection plate is detachably socketed on the outer peripheral surface of the nut body and abuts against the limit plate, which avoids the need for the nut assembly in the prior art.
  • connection plate needs to be placed in the insert injection molding, so that the nut body and the connection plate can be processed and formed independently and combined together, which improves the production efficiency and avoids the situation that the nut body with the connection plate cannot be recycled for secondary use , so that the nut body can be better used for secondary recycling. And set up like this, has avoided the nut set in the prior art Due to the process, there are many burrs at the connection position between the connecting plate and the nut body when the parts are inserted into the injection molding, resulting in damage to the nut assembly, which improves the reliability and stability of the nut assembly.
  • Fig. 1 shows the structural representation of the nut assembly provided by the embodiment of the present application
  • Fig. 2 shows a schematic structural view of the nut and the limit boss in the nut assembly of Fig. 1;
  • Fig. 3 shows a schematic structural view of a connecting plate and a limiting groove of the nut assembly of Fig. 1;
  • Fig. 4 shows a schematic structural diagram of an electronic expansion valve provided by another embodiment of the present application.
  • Fig. 5 shows a cross-sectional view of the electronic expansion valve of Fig. 4;
  • Figure 6 shows an enlarged view of the selected position in Figure 5;
  • FIG. 7 shows a schematic structural view of another nut assembly provided by an embodiment of the present application.
  • Fig. 8 shows a schematic structural view of another nut assembly provided by an embodiment of the present application.
  • Fig. 9 shows a schematic diagram of part of the structure in Fig. 8.
  • Figure 10 shows a schematic diagram of the rotor assembly in Figure 4.
  • Fig. 11 shows a schematic diagram of part of the structure in Fig. 10;
  • Figure 12 shows a schematic diagram of the guide piece in Figure 10
  • Fig. 13 shows a schematic structural view of another nut assembly provided by an embodiment of the present application.
  • Figure 14 shows a schematic diagram of the nut in Figure 13;
  • Fig. 15 shows a schematic structural view of another nut assembly provided by an embodiment of the present application.
  • Figure 16 shows another view of Figure 14
  • Figure 17 shows a bottom view of Figure 16
  • Figure 18 shows a schematic diagram of the connecting plate in Figure 13;
  • Fig. 19 shows a schematic structural view of another nut assembly provided by an embodiment of the present application.
  • Figure 20 shows a top view of the nut assembly of Figure 19
  • Fig. 21 shows a schematic diagram of the included angle labeling of the nut of Fig. 20;
  • Fig. 22 shows a schematic structural diagram of an electronic expansion valve provided by another embodiment of the present application.
  • Figure 23 shows a cross-sectional view of the nut in Figure 22;
  • Figure 24 shows a partial enlarged view 1 in Figure 22;
  • Fig. 25 shows the partial enlarged view 2 in Fig. 22;
  • FIG. 26 shows a schematic structural view of the rotor assembly in FIG. 22 .
  • valve body assembly 41. Bonnet; 42. Valve seat; 421. Positioning boss; 422. Valve port; 040. Valve port piece; 042. Body; 0421. First shaft section; 0422. Second shaft section ;0423, the third axis section; 4221, the first step surface; 4222, the second step surface;
  • the embodiment of the present application provides a nut assembly, including: a nut 10, the nut 10 includes a nut body 11 and a limiting plate 12 connected to each other, and the radial dimension of the limiting plate 12 is larger than The radial dimension of the nut main body 11 : the connecting plate 20 , the connecting plate 20 is detachably sleeved on the nut main body 11 , and the connecting plate 20 abuts against the limiting plate 12 .
  • the nut body 11 and the connection plate 20 of the nut assembly are arranged separately, so that the connection plate 20 is detachably socketed on the outer peripheral surface of the nut body 11 and abuts against the limit plate 12, avoiding
  • the connection plate needs to be put in, so that the nut body 11 and the connection plate 20 can be independently processed and formed and combined together, which improves the production efficiency, and at the same time avoids the connection plate with the connection plate.
  • the fact that the nut body cannot be recycled for secondary use makes the nut better for secondary recycling.
  • this arrangement avoids the situation that the nut assembly is damaged due to the fact that there are many burrs at the connection position of the connecting plate and the nut body due to technological reasons when the nut assembly is insert-molded, and the reliability and reliability of the nut assembly are improved. stability.
  • the limiting plate 12 or the nut body 11 has a first limiting structure
  • the connecting plate 20 has a second limiting structure
  • the first limiting structure and the second limiting structure are limited in cooperation.
  • the relative position of the connecting plate 20 and the nut in the circumferential direction is limited through the limited cooperation of the first limiting structure and the second limiting structure, so that the connecting plate 20 and the nut will not rotate relative to each other after the installation is completed. , to ensure the reliability of the nut assembly.
  • the first limiting structure includes a limiting boss 31 arranged on the outer wall of the nut body 11, the second limiting structure includes a limiting groove 32 arranged on the inner wall of the connecting plate 20, and the limiting boss 31 is located in the limiting groove 32.
  • the relative position of the connecting plate 20 and the nut in the circumferential direction is limited, so that the connecting plate 20 and the nut are in the Relative rotation will not occur after the installation is completed, ensuring the reliability of the nut assembly.
  • adopting the limiting method of clamping the limiting boss 31 and the limiting groove 32 facilitates the processing of the limiting boss 31 and the limiting groove 32, and the limiting effect is good.
  • the plurality of limiting bosses 31 are arranged around the nut body 11.
  • the one-to-one correspondence with the plurality of limiting bosses 31 can also better determine the relative positions of the connecting plate 20 and the nut body 11 , preventing the connecting plate 20 and the nut body 11 from being arranged eccentrically.
  • the nut body 11 includes a nut section 111, a transition section 112 and a connecting section 113 connected in sequence, the radial dimension of the connecting section 113 is greater than the radial dimension of the nut section 111, and the nut section 111 has an internal thread, and the connecting section 113 and The limiting plate 12 is connected, and the connecting plate 20 is detachably sleeved on the connecting section 113 .
  • the connecting plate 20 is sleeved on the connecting section 113 and abuts against the limiting plate 12, the limiting boss 31 is arranged on the limiting plate 12 and the connecting section 113, and the limiting groove 32 is arranged on the connecting plate On the inner ring of 20, such arrangement facilitates the miniaturization of the nut assembly, and facilitates the limited fit of the limiting boss 31 and the limiting groove 32 at the same time.
  • the electronic expansion valve includes a valve body assembly 40 and the aforementioned nut assembly, and the nut assembly is located in the valve body assembly 40 .
  • the valve body assembly 40 includes a valve cover 41 and a valve seat 42 connected to each other, at least a part of the nut body 11 is located in the cavity of the valve cover 41, the limiting plate 12 is located in the cavity of the valve seat 42, and the connecting plate The outer side wall of 20 and the inner side wall of valve seat 42 are welded.
  • both the nut section 111 and the transition section 112 of the nut body 11 are located in the cavity of the valve cover 41, the connecting section 113 of the nut body 11 is partially located in the cavity of the valve cover 41, and the other part is located in the cavity of the valve seat 42 Inside, the limiting plate 12 is located in the cavity of the valve seat 42 .
  • the outer diameter of the connecting plate 20 is greater than the maximum outer diameter of the nut main body 11, and the outer side wall of the connecting plate 20 is welded to the inner side wall of the valve seat 42 to prevent the movement of the nut assembly in the cavity of the valve body assembly 40 and ensure the electronic expansion valve. reliability and stability.
  • the valve seat 42 has an opening, and the connecting plate 20 is arranged at the opening.
  • the distance between the side of the connecting plate 20 away from the cavity of the valve seat 42 and the plane where the opening is located is L, and L ⁇ 0.02mm , the thickness of the connecting plate 20 is t, and L ⁇ 0.4t.
  • connecting plate 20 is positioned in the cavity of valve seat 42 through the opening, and another part is then positioned in the cavity of valve cover 41, limits the numerical range of L and t, ensures the connection of connecting plate 20 and valve seat 42
  • an annular step can be formed, and a welding point is formed at the annular position where the connecting plate 20 and the valve seat 42 are connected, so as to avoid the situation that the step height formed between the connecting plate 20 and the valve seat 42 is too low to cause unreliable welding, and ensure that the connecting plate 20 Reliability of welding connection with valve seat 42.
  • the connecting plate 20 has a balance hole or a balance groove 21 , and the cavity of the valve seat 42 and the cavity of the valve cover 41 communicate through the balance hole or the balance groove 21 .
  • the opening of the valve seat 42 communicates with the cavity of the valve cover 41.
  • the cavity of the valve seat 42 and the cavity of the valve cover 41 are separated by the nut assembly.
  • a balance hole or a balance groove 21 is provided on the top to communicate with the cavity of the valve cover 41 and the cavity of the valve seat 42 to achieve pressure balance in the valve body assembly 40 and ensure the reliability of the electronic expansion valve.
  • the electronic expansion valve also includes a guide sleeve 50 and a valve needle assembly 60
  • the nut 10 has a positioning hole, and a stop surface is provided in the positioning hole, one end of the guide sleeve 50 penetrates into the positioning hole, and the end surface of the guide sleeve 50 and the stop surface
  • the valve needle assembly 60 is threadedly connected with the nut body 11 , and the valve needle assembly 60 passes through the guide sleeve 50 .
  • the valve needle assembly 60 is movably installed in the guide sleeve 50, the screw rod of the valve needle assembly 60 is threadedly connected with the internal thread of the nut body 11, the positioning hole of the nut is set through the whole nut, and there is a The stop surface, one end of the guide sleeve 50 abuts against the stop surface, and the outer side wall of the guide sleeve 50 and the inner side wall of the positioning hole are limit-fitted. In this way, through the cooperation of the stop surface and the guide sleeve 50, the locking of the nut is realized.
  • the positioning function through the guide sleeve 50 to position and axially limit the nut assembly as a whole, can better ensure the coaxiality between the valve seat 42 and the nut assembly, and improve the internal leakage prevention performance of the electronic expansion valve.
  • the inner wall of the valve seat 42 has a positioning boss 421, the positioning boss 421 has a valve port 422, the positioning boss 421 penetrates the end of the guide sleeve 50 away from the nut 10, the positioning boss 421, the guide sleeve 50, and the positioning hole It is arranged coaxially with the valve needle assembly 60.
  • Such setting can ensure the coaxiality between the valve cover 41 and the valve seat 42 and ensure the reliability of the electronic expansion valve.
  • the positioning boss 421 and the valve seat 42 are integrated, or the positioning boss 421 and the valve seat 42 are separate structures.
  • the electronic expansion valve further includes a rotor assembly, which is disposed in the cavity of the valve cover 41 and is connected with the valve needle assembly, and cooperates with the stopper of the nut assembly.
  • the installation process of the electronic expansion valve is as follows. First, install the connected valve needle assembly 60 and nut assembly together with the valve seat 42, that is, let the inner wall of the nut positioning hole and the outer wall of the guide sleeve 50 limit fit, and then connect the The plate 20 is sleeved on the connecting section 113, and a force is applied to the connecting plate 20 toward the limiting plate 12, so that the connecting plate 20 and the limiting plate 12 abut, and drive the entire nut assembly to move into the cavity of the valve seat 42 until The stop surface abuts against one end of the guide sleeve 50, at this time a step is formed between the connecting plate 20 and the side wall of the valve seat 42, and welding is performed at the connection position between the connecting plate 20 and the valve seat 42, and then the rotor assembly and the valve
  • the nut 10 has an internal thread, and the outer peripheral surface of the nut 10 has a spiral guide groove 13; the nut assembly also includes a stop ring 70, and the stop ring 70 is sleeved in the spiral guide groove 13 to stop The retaining ring 70 can rotate along the spiral guide groove 13 .
  • the spiral guide groove 13 By arranging the spiral guide groove 13, the complex problem of nut, stop ring and limit spring assembly in the prior art is avoided, and no limit spring needs to be installed, which simplifies the installation process and facilitates the realization of stop ring 70 and nut 10. Automated installation further improves the production efficiency of the nut assembly.
  • the nut assembly also includes a third limiting structure, the third limiting structure is arranged on the outer peripheral surface of the nut body 11, the third limiting structure is located on the side of the spiral guide groove 13 away from the connecting plate 20, the third limiting structure Cooperate with stop ring 70 stops. Arranged in this way, the movement of the stop ring 70 on the spiral guide groove 13 can be limited, preventing the stop ring 70 from coming out of the spiral guide groove 13 when moving toward the side away from the connecting plate 20 in the spiral guide groove 13, The reliability of the movement of the stop ring 70 is guaranteed.
  • the third limiting structure is a first limiting block 411, and the first limiting block 411 protrudes from the outer peripheral surface of the nut body 11.
  • the first limiting block 411 and the stop ring 70 stop and cooperate.
  • a limiting block 411 and the nut body 11 are integrally formed.
  • This setting facilitates the processing of the nut assembly, and the movement of the stop ring 70 on the spiral guide groove 13 is limited by the first limit block 411, preventing the stop ring 70 from moving away from the connecting plate 20 in the spiral guide groove 13
  • the first limit block 411 prevents the stop ring 70 from moving away from the connecting plate 20 in the spiral guide groove 13
  • it can also avoid the failure of the upper stop caused by the defective limit spring in the nut assembly in the prior art, so as to ensure that the nut main body 11 and the first limit block 411
  • the reliability of the connection ensures the reliability of the movement of the stop ring 70 at the same time.
  • the third limiting structure is a limiting ring 412.
  • the limiting ring 412 includes an arc 4121 and a first folding hook 4122 and a second folding hook 4123 arranged at both ends of the arc 4121.
  • the first folding hook 4122 is located at the arc.
  • the side of the shaped part 4121 away from the stop ring 70, the second hook 4123 is located on the side of the arc part 4121 facing the stop ring 70, the arc part 4121 and the first hook 4122 are connected to the nut body 11, the second The folding hook 4123 and the stop ring 70 stop and cooperate.
  • the stop ring 70 can be assembled on the nut main body 11 first, and then the stop ring 412 can be installed.
  • This arrangement facilitates the automation of the stop ring 70 and the nut body 11 installation, further improving the production efficiency of the nut assembly.
  • the situation that the stop ring 70 and the arc part 4121 of the stop ring 412 are directly stopped is avoided, and the arc part 4121 is prevented from being damaged by burrs at one end of the stop ring 70, so as to ensure the reliability of the stop ring 412.
  • the outer peripheral surface of the nut main body 11 has a fitting groove 15, and the arc piece 4121 and/or the first hook 4122 are limitedly fitted with the fitting groove 15;
  • the fitting groove 15 includes a first locking groove 151 and a second locking groove 152,
  • the first engaging groove 151 is an arc-shaped groove, the first engaging groove 151 extends along the circumferential direction of the nut main body 11, the second engaging groove 152 extends along the axial direction of the nut main body 11, and the arc-shaped part 4121 engages with the first engaging groove 151. Then, the first folding hook 4122 is engaged with the second engaging slot 152 .
  • the movement of the stop ring 412 in the axial direction of the nut body 11 is limited by the engagement of the arc-shaped piece 4121 and the first slot 151 , and the movement of the stop ring 412 along the axis of the nut body 11 is restricted by the engagement of the first hook 4122 and the second slot 152 . Clamping restricts the rotation of the limiting ring 412 in the circumferential direction of the nut body 11 to ensure the reliability of the connection of the limiting ring 412 .
  • the third limit structure has a first stop surface 4124 that protrudes from the outer peripheral surface of the nut body 11, and the stop ring 70 and the first stop surface 4124 stop and cooperate;
  • the fourth limit structure, the fourth limit structure Set on the nut main body 11, the fourth position-limiting structure has a second stop surface 431 protruding from the outer peripheral surface of the nut main body 11, and the stop ring 70 and the second stop surface 431 stop and cooperate; wherein, the spiral guide groove 13 is located at Between the third limiting structure and the fourth limiting structure.
  • the stop position between the stop ring 70 and the first stop surface and the stop position between the stop ring 70 and the second stop surface are located in the spiral guide groove 13 or the extension of the spiral guide groove 13 The situation on the line prevents the stop ring 70 from producing powder and the like entering the spiral guide groove 13 after the stop hits and causes the stop ring 70 to be stuck, ensuring the reliability of the stop ring 70 moving.
  • the third limiting structure and the fourth limiting structure respectively limit the stop ring 70 in two directions along the axis of the nut body 11 .
  • Both the first stop surface 4124 and the second stop surface 431 are set to avoid the spiral guide groove 13 or the extension line of the spiral guide groove 13 .
  • Arranged in this way it is ensured that the stop positions of the stop ring 70 and the first stop surface and the stop positions of the stop ring 70 and the second stop surface are not in the spiral guide groove 13 or on the extension line of the spiral guide groove 13, It prevents the stop ring 70 from being stuck due to powder and the like entering the spiral guide groove 13 after the stop hits, and ensures the reliability of the stop ring 70 to move.
  • the retaining ring 70 includes a spiral member 71 and a third folding hook 72 and a fourth folding hook 73 respectively arranged at two ends of the spiral member 71, the spiral member 71 is located in the spiral guide groove 13, the third folding hook 72 and the third limit Position structure stop fit, the fourth folding hook 73 and the fourth limit structure stop fit.
  • the stops at both ends of the stop ring in the prior art are changed into two-fold hook stops, which increases the stop area and can Ensure that no or less powder is generated during the impact of the stopper, ensuring the performance of the nut assembly.
  • the third hook 72 extends away from the outer peripheral surface of the nut body 11, the fourth hook 73 is located on the side of the screw 71 facing the fourth limiting structure, and the fourth hook 73 is along the axis of the nut body 11. Extension; in this embodiment, the third folding hook 72 is arranged perpendicular to the axis of the nut body 11, and the fourth folding hook 73 is arranged obliquely, so that the stop position of the stop ring 70 protrudes from the spiral guide groove 13 and is conveniently set .
  • the fourth limiting structure is the second limiting block 43
  • the second stop surface 431 is located on the outer wall of the second limiting block 43
  • the stopper ring 70 is matched with the outer wall of the second limiting block 43.
  • one end of the nut body 11 has a guiding slope 115 for guiding when the limiting ring 412 is assembled.
  • Such arrangement is convenient for guiding the installation of the stop ring 70 and the limit ring 412 on the nut body 11 , and facilitates automatic installation of the nut assembly.
  • the nut assembly also includes a second limiting block 43 protruding from the outer peripheral surface of the nut body 11 , and the second limiting block 43 is located on the side of the spiral guide groove 13 facing the connecting plate 20 , the second limiting block 43 and the stop ring 70 stop fit, and the second limiting block 43 and the nut body 11 are integrally structured.
  • This arrangement facilitates the processing of the nut assembly, and the movement of the stop ring 70 on the helical guide groove 13 is limited by the second limit block 43, preventing the stop ring 70 from moving toward the connecting plate 20 in the helical guide groove 13.
  • the first limiting block 411 and the second limiting block 43 respectively limit the two directions of axial movement of the stop ring 70 to ensure the reliability of the nut assembly.
  • the nut body 11 includes a nut segment 111, and the outer peripheral surface of the nut segment 111 has two opposite demoulding planes 114, the demoulding plane 114 is arranged along the axial direction of the nut segment 111, and the spiral guide groove 13 is arranged on the nut segment 111 on the outer peripheral surface between the two demoulding planes 114 .
  • the demoulding plane 114 By setting the demoulding plane 114, the processing and demoulding of the nut main body 11 is facilitated, the automation of the production of the nut main body 11 is realized, and the production efficiency of the nut assembly is improved.
  • the electronic expansion valve also includes a rotor assembly 90
  • the rotor assembly 90 includes a rotor connecting plate 91, a guide plate 92 and a cylindrical magnetic rotor 93
  • the rotor connecting plate 91 is located on the magnetic rotor 93
  • the cavity of the magnetic rotor 93 is fixedly connected with the magnetic rotor 93.
  • the guide piece 92 is located in the cavity of the magnetic rotor 93 and fixedly connected with the rotor connecting plate 91.
  • the guide piece 92 and the stop ring 70 are limitedly fitted.
  • the rotor connecting plate 91 and the magnetic rotor 93 rotate synchronously under the drive of the external coil, and drive the guide plate 92 fixedly connected to the rotor connecting plate 91 to rotate synchronously and move along the axis direction of the nut body 11.
  • the guide piece 92 abuts against the stop ring 70 , and then drives the stop ring 70 to spirally move on the nut body 11 .
  • there is a gap between the guide plate 92 and the inner wall of the cavity of the magnetic rotor 93 or there is no gap between the guide plate 92 and the inner wall of the cavity of the magnetic rotor 93 .
  • the guide piece 92 and the magnetic rotor 93 there may be no gap between the guide piece 92 and the magnetic rotor 93, and the material of the guide piece at this time is different from that of the above-mentioned guide piece.
  • This arrangement avoids the need for laser welding of the powder metallurgy rotor connecting plate and the guide plate in the prior art, which is prone to blackening and cracks after welding, and ensures the reliability of the rotor assembly 90 .
  • the rotor connecting plate 91 has a press-fitting groove 94
  • the guide piece 92 includes a press-fitting section 921 and a limiting section 922 connected to each other.
  • the limiting section 922 extends along the axial direction of the nut 10 and is limitedly matched with the stop ring 70;
  • the electronic expansion valve also includes a valve needle assembly 60, which is threadedly connected to the nut body 11, and the valve needle assembly 60 and The rotor assembly 90 is fixedly connected.
  • the fixed connection between the rotor connecting plate 91 and the guide piece 92 is realized through the limited fit between the press-fitting section 921 and the press-fitting groove 94 , without welding connection, which reduces the processing cost.
  • the press-fit section 921 is in interference fit with the press-fit groove 94
  • the press-fit groove 94 is a rectangular groove.
  • the balance channel 030 communicates the areas on both sides of the connection plate 20 .
  • the communication between the areas on both sides of the connecting plate 20 is realized through the balance channel 030, thereby achieving pressure balance in the areas on both sides of the connecting plate 20.
  • the plate and the nut separate the cavity areas on both sides of the mating plate, resulting in unbalanced pressure in the cavity areas on both sides of the mating plate, ensuring the reliability and stability of the nut assembly after it is installed in the valve body assembly.
  • the first limiting structure is located on the nut body 11, the first limiting structure has a first groove 031, the limiting plate 12 has a second groove 032, and the first groove 031 and the second groove 032 form a balance channel 030;
  • the first groove 031 is arranged on the first limiting structure
  • the second groove 032 is arranged on the limiting plate 12, which facilitates the processing of the first limiting structure and the limiting plate 12
  • the overall size of the first limiting structure and the limiting plate 12 is reduced to ensure the miniaturization of the nut assembly and improve the production efficiency of the nut assembly.
  • the first limiting structure has a first groove 031
  • the second limiting structure has a third groove
  • the first groove 031 and the third groove form a balance channel 030
  • the first groove 031 is arranged on the first limiting structure
  • the third groove is arranged on the second limiting structure, which facilitates the processing of the first limiting structure and the second limiting structure, and reduces the first
  • the overall size of the limiting structure and the second limiting structure ensures the miniaturization of the nut assembly and improves the production efficiency of the nut assembly.
  • the third groove should be set away from the limit plate 12 to ensure that the connected first groove 031 and the third groove can connect the areas on both sides of the connecting plate 20 to ensure the reliability of the balance channel 030 .
  • the outer wall of the nut body 11 has a cutout surface 013
  • the balance channel 030 is located between the cutout surface 013 and the inner wall of the connecting plate 20 .
  • the position of the cut surface 013 can be the position of the mold line when the nut body 11 is molded.
  • the nut body 11 includes a nut section 111, a transition section 112, and a connecting section 113 that are sequentially connected.
  • the maximum radial dimension of the limiting plate 12 is larger than the maximum radial dimension of the connecting section 113.
  • Plane 0131, second plane 0132, third plane 0133 and fourth plane 0134, the first plane 0131 is located at the nut section 111, the second plane 0132 is located at the transition section 112, the third plane 0133 is located at the connecting section 113, and the fourth plane 0134 is located at The limiting plate 12 ; wherein, the third plane 0133 and the fourth plane 0134 are coplanar, and the balance channel 030 is located between the third plane 0133 and the inner wall of the connecting plate 20 .
  • the first plane 0131, the second plane 0132, the third plane 0133 and the fourth plane 0134 are sequentially connected, so that the first plane 0131, the second plane 0132, the third plane 0133 and the fourth plane 0134 can be Cutting and forming facilitates the cutting and processing of the nut body 11 and improves the processing and production efficiency of the nut body 11 .
  • the third plane 0133 and the fourth plane 0134 are coplanar to prevent the balance channel 030 located between the third plane 0133 and the connecting plate 20 from being blocked by the fourth plane 0134 and ensure the reliability of the communication of the balance channel 030 .
  • the connecting plate 20 and the nut 10 are interference fit in the circumferential direction, and the connecting plate 20 and the nut 10 are clearance fit in the radial direction.
  • the connecting plate 20 on the nut 10 can move radially of the nut 10 but cannot rotate along the circumferential direction of the nut 10, avoiding the nut assembly in the related art during the process of loading the valve body assembly due to the 20 and the valve body assembly are also closely matched, resulting in over-positioning of the nut 10 in the radial direction, which cannot ensure the coaxiality between the nut assembly and the valve body assembly, and improves the coaxiality of the nut assembly and the valve body assembly, reducing The processing accuracy and processing cost of the nut assembly are reduced, the difficulty of assembling the nut assembly is reduced, and the production efficiency of the nut assembly is improved.
  • the nut main body 11 is provided with a first limiting structure
  • the connecting plate 20 includes a connecting ring 021 and a second limiting structure arranged on the connecting ring 021, wherein the connecting ring 021 is sleeved on the nut main body 11, and the connecting ring 021 and The nut body 11 is loosely fitted, the first limiting structure and the second limiting structure are in clearance fit in the radial direction of the connecting ring 021 , and the first limiting structure and the second limiting structure are interference fit in the circumferential direction of the connecting ring 021 .
  • the limited fit between the connecting plate 20 and the nut 10 is realized through the limited fit between the first limit structure and the second limit structure, and the first limit structure is directly arranged on the nut 10.
  • the second limiting structure is directly arranged on the connecting plate 20, which facilitates processing and reduces the overall size of the first limiting structure and the second limiting structure, ensuring miniaturization of the nut assembly.
  • the first limiting structure includes a limiting boss 31 arranged on the outer wall of the nut body 11, the second limiting structure includes a limiting groove 32 arranged on the inner wall of the connecting plate 20, and the limiting boss 31 is located in the limiting groove 32.
  • the limit fit between the first limit structure and the second limit structure is mainly designed as a limit fit between the limit bump and the limit groove, which is simple in structure, easy to process, and reliable in cooperation. .
  • the limiting boss 31 has two first limiting surfaces 311 and a first mating surface 312 between the two first limiting surfaces 311, and the limiting groove 32 has two second limiting surfaces 321 and is located between the two first limiting surfaces 311.
  • the second matching surface 322 between the second limiting surfaces 321; wherein, the first matching surface 312 and the second matching surface 322 are clearance fit, and the two first limiting surfaces 311 and the two second limiting surfaces 321 are one by one Corresponding limit fit.
  • the connecting plate 20 can move slightly along the radial direction of the nut body 11, through the two first limiting surfaces 311 and the two
  • the second limiting surface 321 is one-to-one correspondingly limited and fitted, so that the rotation of the connecting plate 20 along the circumferential direction of the nut body 11 is restricted, avoiding the situation that the connecting plate 20 is over-positioned, and facilitating the positioning of the limiting boss and the limiting groove.
  • Advanced processing and molding, simple structure and reliable cooperation Specifically, the two first limiting surfaces 311 and the two second limiting surfaces 321 are in one-to-one interference fit.
  • the two first limiting surfaces 311 and the two second limiting surfaces 321 are arranged in parallel, the distance between the two first limiting surfaces 311 is L1, and the distance between the two second limiting surfaces 321 The distance is L2, L1-L2 ⁇ 0.03mm; set in this way, so that the width of the limiting groove sleeved on the outer peripheral surface of the nut main body 11 is smaller than the width of the limiting protrusion on the nut main body 11, ensuring that the first limiting surface 311 The reliability of the interference fit between the second limiting surface 321 and the second limiting surface 321.
  • the interference between the limit protrusion and the limit groove is not enough to limit the rotation of the connecting plate 20 along the circumferential direction of the nut body 11, ensuring the limit The reliability of the interference fit between the protrusion and the limit groove.
  • first mating surface 312 and the second mating surface 322 are coaxial arcuate surfaces, the diameter of the first mating surface 312 is d3, the diameter of the second mating surface 322 is d4, and d4-d3 ⁇ 0.1mm; Set so that the depth of the limiting groove sleeved on the outer peripheral surface of the nut main body 11 is greater than the length of the limiting protrusion on the nut main body 11, ensuring the reliability of clearance fit between the first mating surface 312 and the second mating surface 322 .
  • d4-d3 ⁇ 0.1mm the gap between the limit projection and the limit groove is not enough to enable the connecting plate 20 to move radially along the nut body 11, ensuring that the limit projection and the Reliability of clearance fit between limit slots.
  • the maximum diameter of the nut body 11 is d1, the inner diameter of the connecting ring 021 is d2, and d2-d1 ⁇ 0.1mm; this setting makes the maximum radial dimension of the nut body 11 larger than the inner diameter of the connecting ring 021, ensuring that the connecting ring 021 along the nut body 11 Reliability of radial movement.
  • d2-d1 ⁇ 0.1mm the inner wall of the connecting ring 021 and the outer wall of the nut body 11 are avoided.
  • the tight fitting of the side walls results in the fact that the connecting plate 20 cannot move radially along the nut body 11 , ensuring the reliability of clearance fit between the connecting plate 20 and the nut 10 .
  • the size of the limiting boss 31 is greater than the thickness of the connecting plate 20 . Such setting can ensure the limiting effect of the limiting boss on the connecting plate 20 .
  • a fool-proof structure is provided between the nut 10 and the connection plate 20 , and the fool-proof structure is used to limit the installation position of the connection plate 20 on the nut 10 .
  • connection plate 20 and the nut 10 are arranged separately, which avoids the need to put the connection plate into the nut assembly in the prior art when performing insert injection molding, improves production efficiency, and avoids the need for connection with a connection plate.
  • the situation that the nuts of the plate cannot be recycled for secondary use makes the nuts better for secondary recycling.
  • this setting avoids the situation that the nut assembly is damaged due to the fact that there are many burrs at the connection position of the connecting plate and the nut when the nut assembly is insert-molded in the prior art due to technological reasons, and the structural strength of the nut assembly is improved.
  • the connecting plate 20 and the nut 10 can have the only correct assembly position. If the position is wrong, the assembly cannot be completed, which avoids the situation that the connecting plate 20 is installed in reverse during the process of fitting the nut 10, and ensures the nut. Assembly quality of components.
  • the foolproof structure includes a first limiting portion 831 and a second limiting portion 832 arranged on the nut body 11 , a third limiting portion 833 and a fourth limiting portion 834 arranged on the connecting plate 20 , and A limiting part 831 and the third limiting part 833 limit fit, and the second limiting part 832 and the fourth limiting part 834 limit fit; wherein, the connecting plate 20 has a burr surface 201, and the fool-proof structure limits the burr surface 201 away from the limiting plate 12.
  • the connecting plate 20 is detachably sleeved on the nut body 11 and abuts against the limiting plate 12, and the burr surface 201 of the connecting plate 20 passes through the first limiting portion 831, the third limiting portion 833 and The limit fit between the second limiter 832 and the fourth limiter 834 deviates from the limiter plate 12, avoiding the inability of the operator in the prior art to accurately judge whether the burr surface of the linker is located in the process of installing the linker. Which side will cause the burr surface of the connecting plate to contact the limit plate after the installation is completed, so as to ensure the assembly quality of the nut assembly.
  • the first limiting portion 831 includes a first limiting projection
  • the second limiting portion 832 includes a second limiting projection
  • the third limiting portion 833 includes a first limiting groove
  • the fourth limiting portion 834 includes The second limiting groove
  • the first limiting protrusion is snapped into the first limiting groove
  • the second limiting protrusion is snapped into the second limiting groove, wherein the dimensions of the first limiting protrusion and the second limiting protrusion are Not equal; in the circumferential direction of the nut 10, the size of the first limiting protrusion is greater than the size of the second limiting protrusion, and the first limiting groove and the second limiting groove have an angle A in the circumferential direction of the connecting plate 20 , 0° ⁇ A ⁇ 180°.
  • the first limit projection, the first limit groove, the second limit projection, and the second limit groove can still be limited and fit, but the burr surface 201 faces the limit plate 12
  • the reliability of the assembly of the connecting plate 20 is ensured, and the assembly quality of the nut assembly is ensured.
  • the fool-proof structure further includes a fifth limiting portion 35 disposed on the nut 10 and a sixth limiting portion 36 disposed on the connecting plate 20, wherein the second limiting portion 832 is located between the first limiting portion 831 and the connecting plate 20.
  • the fourth limiting part 834 is located between the third limiting part 833 and the sixth limiting part 36 , and the fifth limiting part 35 and the sixth limiting part 36 cooperate.
  • the nut assembly ensures the reliability of the assembly of the connecting plate 20 and the nut 10 and the assembly quality of the nut assembly through the limited fit of different positions between the three sets of limiting parts.
  • the first limiting portion 831, the second limiting portion 832, and the fifth limiting portion 35 are arranged at intervals along the circumferential direction of the nut 10, and the third limiting portion 833, the fourth limiting portion 834, and the sixth limiting portion
  • the portions 36 are arranged at intervals along the axial direction of the connecting plate 20 .
  • the fifth limiting portion 35 includes a third limiting projection
  • the sixth limiting portion 36 includes a third limiting groove
  • the third limiting projection snaps into the third limiting groove, wherein the first limiting Both the size of the portion 831 and the fifth limiting portion 35 are larger than the size of the second limiting portion 832 .
  • the limit fit between the two limit parts is mainly designed as a limit fit between the limit protrusion and the limit groove, which has a simple structure, is easy to process, and is reliable in cooperation.
  • the sizes of the first limiting portion 831 and the fifth limiting portion 35 are larger than the size of the second limiting portion 832, and correspondingly, the sizes of the third limiting portion 833 and the sixth limiting portion 36 are larger than the fourth limiting portion
  • the part 834 is set in this way, so that when the size of the first or third limiting protrusion is equal to that of the second limiting protrusion, the burr surface 201 faces the limiting plate 12 after the connecting plate 20 is turned around the radial direction.
  • the connecting plate 20 can be wound around After radial flipping, the burr surface 201 faces the limit plate 12, but the first limit projection, the first limit groove, the second limit projection, the second limit groove and the third limit projection, the third limit.
  • the size and positional relationship between the limiting protrusion and the third limiting protrusion are limited to ensure the reliability of the assembly of the connecting plate 20 and the assembly quality of the nut assembly.
  • the second limiting portion 832 and the first limiting portion 831 have an included angle B in the circumferential direction of the connecting plate 20
  • the included angle between part 831 and the fifth limiting part 35 is 90°, turn over the connecting plate 20 so that the burr surface 201 faces downward, and then rotate the connecting plate 20 axially by a certain angle, so that the first limiting part 831 and the sixth limiting part 36 limit fit, the second limit part 832 and the fourth limit part 834 limit fit, the third limit part 833 and the fifth limit part 35 limit fit, so that the connecting plate 20 If it can still be installed, the reliability of the assembly of the connecting plate 20 is ensured, and the assembly quality of the nut assembly is ensured.
  • the connecting plate 20 and the nut 10 in the electronic expansion valve are clearance fit in the radial direction;
  • the valve body assembly 40 includes a valve seat 42, the outer wall of the connecting plate 20 and the valve seat 42 is fixedly connected, and the connecting plate 20 and the valve seat 42 are matched in the axial clearance of the nut 10;
  • the electronic expansion valve also includes a guide sleeve 50, which is fixedly arranged on the valve seat 42, the guide sleeve 50 is inserted into the nut 10, and the guide sleeve 50 and the nut 10 abut in the axial direction and have an interference fit in the radial direction.
  • the coaxiality of the guide sleeve 50 and the nut 10 is ensured, further, the nut 10 and the guide sleeve 50
  • the coaxiality is determined, there should be enough adjustment clearance between the connecting plate 20 and the nut 10 and between the connecting plate 20 and the valve seat 42 to prevent the over-positioning of the connecting plate 20 during the installation process from causing the nut 10 and the guide sleeve
  • the coaxiality between 50 will affect the coaxiality of the nut assembly.
  • the connecting plate 20 and the nut 10 have clearance fit in the radial direction, and when the nut assembly is installed, when the guide sleeve 50 and the nut 10 abut, there is a clearance between the connecting plate 20 and the valve seat 42 in the axial direction of the nut 10 , to avoid the situation in the related art that when the guide sleeve and the nut abut, the connecting plate and the valve seat also abut in the axial direction of the nut, resulting in the over-positioning of the nut, and also avoid the situation that the connecting plate and the valve seat are in the axial direction of the nut.
  • the nut 10 has a positioning hole 1101, the positioning hole 1101 has a stop surface 1102, one end of the guide sleeve 50 penetrates the positioning hole 1101, the end surface of the guide sleeve 50 abuts against the stop surface 1102, the outer wall of the guide sleeve 50 and the positioning
  • the inner wall of the hole 1101 is an interference fit; or the guide sleeve 50 has a positioning hole 1101, the positioning hole 1101 has a stop surface 1102, one end of the nut 10 penetrates the positioning hole 1101, the end surface of the nut 10 abuts against the stop surface 1102, and the nut
  • the outer wall of 10 and the inner wall of the positioning hole 1101 are interference fit.
  • the nut 10 has a positioning hole 1101 , and one end of the guide sleeve 50 penetrates into the positioning hole 1101 .
  • the electronic expansion valve further includes a positioning boss 421 arranged in the valve seat 42.
  • the positioning boss 421 and the end of the guide sleeve 50 away from the nut 10 are plugged together.
  • the positioning boss 421 and the guide sleeve 50 are axially abutment and interference fit in the radial direction. Arranged in this way, the coaxiality between the positioning boss 421 and the guide sleeve 50 is ensured through the limited fit between the positioning boss 421 and the guide sleeve 50, thereby ensuring the alignment between the valve seat 42, the guide sleeve 50 and the nut assembly. Coaxiality ensures the performance of the electronic expansion valve.
  • the positioning boss 421 and the valve seat 42 are integrated; or, the electronic expansion valve includes a valve port 040, and the valve port 040 includes a positioning boss 421 and a body 042 connected to the positioning boss 421, and the valve port 040 It also has a valve port that runs through the body 042 and the positioning boss 421, the body 042 is fixedly connected to the valve seat 42, the positioning boss 421 penetrates the end of the guide sleeve 50 away from the nut 10, and the positioning boss 421 and the guide sleeve 50 are in an interference fit. The guide sleeve 50 abuts against the body 042 .
  • the positioning boss 421 and the valve seat 42 are separate structures, and the installation position of the guide sleeve 50 is positioned and installed through the valve port 040 to ensure the coaxiality of the guide sleeve 50 and the valve seat 42.
  • the axis of the valve seat 42 is set through the center of the valve port.
  • the body 042 includes a first shaft segment 0421, a second shaft segment 0422 and a third shaft segment 0423 connected in sequence, and the outer diameters of the first shaft segment 0421, the second shaft segment 0422 and the third shaft segment 0423 are successively reduced , the first shaft section 0421 is connected to the positioning boss 421; the valve seat 42 has a first fitting hole and a second fitting hole communicating with each other, and the diameter of the first fitting hole is larger than the diameter of the second fitting hole; wherein, the first shaft section 0421 penetrates into the first fitting hole, the second shaft section 0422 passes through the second fitting hole, and the third shaft section 0423 is located outside the valve seat 42 .
  • This arrangement ensures the reliability of the connection between the body 042 and the valve seat 42 , ensures the coaxiality of the main body 042 and the valve seat 42 , and further ensures the coaxiality of the guide sleeve 50 and the valve seat 42 .
  • the inner wall of the valve seat 42 has a first stepped surface 4221 parallel to the axis of the nut 10 and a second stepped surface 4222 perpendicular to the axis of the nut 10.
  • the first stepped surface 4221 and the second stepped surface 4222 form a stepped structure, and the connecting plate 20
  • the outer wall is connected to the first stepped surface 4221 , and the connecting plate 20 is in clearance fit with the second stepped surface 4222 .
  • the connecting plate 20 is positioned and installed through the step structure, which facilitates processing and assembly positioning.
  • a part of the connecting plate 20 is located inside the stepped structure, and another part of the connecting plate 20 is located outside the stepped structure, and the connecting plate 20 and the valve seat 42 are welded.
  • the first stepped surface 4221 is connected to the end surface of the valve seat 42, and the welding position between the connecting plate 20 and the valve seat 42 is a plane where the connecting plate 20 is not in contact with the first stepped surface 4221 (that is, the connecting plate 20 is not in contact with the first stepped surface 4221 ).
  • a welding allowance is reserved for the welding of the connecting plate 20 and the valve seat 42 , so as to ensure the reliability of the welding of the connecting plate 20 and the valve seat 42 . Further, the connecting plate 20 and the valve seat 42 are welded, and the connection is stable and reliable.
  • the valve body assembly 40 also includes a valve cover 41
  • the electronic expansion valve also includes a rotor assembly 90
  • the valve cover 41 is connected to the valve seat 42
  • the rotor assembly 90 is arranged in the valve cover 41
  • the rotor assembly 90 includes a magnetic rotor 93 and is arranged on the magnetic rotor 93
  • the rotating connector includes a rotor connecting plate 91 and a guide piece 92 connected to each other, the rotor connecting plate 91 and the magnetic rotor 93 are fixedly connected, and the guide piece 92 extends along the axial direction of the nut 10
  • the nut assembly also It includes a stop ring 70 rotatably arranged on the nut 10 , and the side wall of the guide plate 92 is in limited fit with the stop ring 70 .
  • the rotor connecting plate 91 and the magnetic rotor 93 rotate synchronously under the drive of the external coil.
  • the guide piece 92 abuts against the stop ring, thereby driving the stop ring Screw movement on the nut 10 .
  • This arrangement avoids the need for laser welding of the powder metallurgy rotor connecting plate and the guide plate in the prior art, which is prone to blackening and cracks after welding, and ensures the reliability of the rotor assembly 90 .
  • the rotating connector is an integral structure, or the rotor connecting plate 91 and the guide piece 92 are two separate structures; the guide piece 92 and the inner wall of the magnetic rotor 93 are in clearance fit, or the guide piece 92 and the inner wall of the magnetic rotor 93 are bonded .
  • the rotating connecting part in this embodiment has an integrated structure, which facilitates the processing of the rotating connecting part and improves the production efficiency of the rotor assembly. Meanwhile, in this embodiment, there is no gap between the guide piece 92 and the magnetic rotor 93 , and the material of the guide piece 92 at this time is different from the material of the guide piece 92 when there is a gap between the two.
  • the rotor assembly 90 also includes a limiting member 95
  • the rotor connecting plate 91 has a press fitting groove 94
  • the limiting member 95 is arranged in the pressing fitting groove 94
  • a part of the nut 10 is located in the magnetic rotor 93
  • the electronic expansion valve also includes The valve needle assembly 60 , the screw of the valve needle assembly 60 is welded to the limiter 95 , and the screw is threaded to the nut 10 .
  • the valve needle assembly 60 and the rotor connecting plate 91 are fixedly connected together through the limiting member 95, which reduces the processing cost.
  • each part of the rotor assembly 90 is set separately and the rotating connector is set as an integrated structure, which avoids the powder metallurgy rotor installed by the insert in the prior art.
  • the component is welded with the valve needle component, it is prone to heat, cracking, demagnetization and other adverse phenomena, which further ensures the reliability of the rotor component 90 .
  • the stopper 95 and the press-fit groove 94 are interference fit or the stopper 95 and the press-fit groove 94 are integrally injection molded, the press-fit groove 94 is a rectangular groove, and the stopper 95 and the valve needle assembly 60 are screw-welded connect.
  • the material of the rotor connecting plate 91 is Pps.
  • the Pps rotor connecting plate has better heat insulation performance and can prevent the magnetic rotor 93 from cracking when the limiting member 95 and the screw of the valve needle assembly 60 are welded.
  • the thickness of the connecting plate 20 is t2, t1 ⁇ 0.3t2. This setting avoids the situation that if t1 is too large, the outer wall of the connecting plate 20 cannot be connected with the valve body assembly, and ensures the reliability of the connection between the nut assembly and the valve body assembly while ensuring the positioning reliability of the nut assembly.

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Abstract

一种螺母组件包括：螺母（10），螺母包括相互连接的螺母主体（11）和限位板（12），限位板（12）的径向尺寸大于螺母主体（11）的径向尺寸；连接板（20），连接板（20）可拆卸地套设在螺母主体（11）上，连接板（20）和限位板（12）抵接。螺母组件的螺母主体和连接板分体设置，提高了生产效率，同时使得螺母主体能够更好地二次回料使用，提高了螺母组件的结构强度。还公开了一种包括该螺母组件的电子膨胀阀。

Description

螺母组件及电子膨胀阀
本申请要求于2022年3月4日提交至中国国家知识产权局、申请号为202220483057.1、发明创造名称为“螺母组件及电子膨胀阀”的专利申请的优先权；
本申请要求于2022年3月4日提交至中国国家知识产权局、申请号为202220475997.6、发明创造名称为“螺母组件及电子膨胀阀”的专利申请的优先权；
本申请要求于2022年3月4日提交至中国国家知识产权局、申请号为202210212550.4、发明创造名称为“电子膨胀阀”的专利申请的优先权；
本申请要求于2022年3月4日提交至中国国家知识产权局、申请号为202220481995.8、发明创造名称为“螺母结构及电动阀”的专利申请的优先权；
本申请要求于2022年3月4日提交至中国国家知识产权局、申请号为202220483043.X、发明创造名称为“螺母组件及电子膨胀阀”的专利申请的优先权；
本申请要求于2022年3月4日提交至中国国家知识产权局、申请号为202220482293.1、发明创造名称为“电子膨胀阀”的专利申请的优先权；
本申请要求于2022年3月4日提交至中国国家知识产权局、申请号为202220476651.8、发明创造名称为“螺母结构及电动阀”的专利申请的优先权；
本申请要求于2022年3月4日提交至中国国家知识产权局、申请号为202210213276.2、发明创造名称为“螺母组件及电子膨胀阀”的专利申请的优先权。
技术领域
本申请涉及电子膨胀阀技术领域，具体而言，涉及一种螺母组件及电子膨胀阀。
背景技术
目前，对于现有技术中的电子膨胀阀中的螺母组件，连接板和螺母主体通常采用嵌接的方式连接，在对螺母组件进行嵌件注塑时，需要放入连接板，导致生产效率低，且带有连接板的螺母主体无法二次回料使用。其次，在螺母主体与连接板的连接处，因工艺原因会存在较多的飞边，影响螺母组件的结构的可靠性和稳定性。
申请内容
本申请提供了一种螺母组件及电子膨胀阀，以提高现有技术中的螺母组件的生产效率和结构强度。
为了实现上述目的，根据本申请的一个方面，本申请提供了一种螺母组件，包括：螺母，螺母包括相互连接的螺母主体和限位板，限位板的径向尺寸大于螺母主体的径向尺寸；连接板，连接板可拆卸地套设在螺母主体上，连接板和限位板抵接。
进一步地，限位板或螺母主体上具有第一限位结构，连接板上具有第二限位结构，第一限位结构和第二限位结构限位配合，以限定连接板和螺母在周向上的相对位置。
进一步地，第一限位结构包括设置在螺母主体外壁的限位凸台，第二限位结构包括设置在连接板内壁的限位槽，限位凸台位于限位槽内。
进一步地，限位凸台为多个，多个限位凸台围绕螺母主体设置，限位槽为多个，多个限位槽和多个限位凸台一一对应设置。
进一步地，螺母主体包括依次连接的螺母段、过渡段和连接段，连接段的径向尺寸大于螺母段的径向尺寸，螺母段内具有内螺纹，连接段和限位板连接，连接板可拆卸地套设在连接段上。
根据本申请的另一方面，提供了一种电子膨胀阀，电子膨胀阀包括阀体组件和上述的螺母组件，螺母组件位于阀体组件内。
进一步地，阀体组件包括相互连接的阀盖和阀座，螺母主体的至少一部分位于阀盖的腔体内，限位板位于阀座的腔体内，连接板的外侧壁和阀座的内侧壁焊接。
进一步地，阀座具有开口，连接板设置在开口处，连接板背离阀座腔体的一侧和开口所在平面之间的距离为L，L≥0.02mm，连接板的厚度为t，L＜0.4t。
进一步地，连接板具有平衡孔或平衡槽，阀座的腔体和阀盖的腔体通过平衡孔或平衡槽连通。
进一步地，电子膨胀阀还包括导向套和阀针组件，螺母具有定位孔，定位孔内具有止挡面，导向套的一端穿入定位孔，导向套的端面和止挡面抵接，阀针组件和螺母主体螺纹连接，且阀针组件穿过导向套。
进一步地，阀座的内壁具有定位凸台，定位凸台内具有阀口，定位凸台穿入导向套远离螺母的一端，定位凸台、导向套、定位孔和阀针组件同轴设置。
应用本申请的技术方案，提供了一种螺母组件，包括：螺母，螺母包括相互连接的螺母主体和限位板，限位板的径向尺寸大于螺母主体的径向尺寸；连接板，连接板可拆卸地套设在螺母主体上，连接板和限位板抵接。采用该方案，将螺母组件的螺母主体和连接板分体设置，使得连接板可拆卸地套接在螺母主体的外周面上并和限位板抵接，避免了现有技术中对螺母组件进行嵌件注塑时需要放入连接板的情况，使得螺母主体和连接板能够分别独立加工成型并组合在一起，提高了生产效率，同时避免了带有连接板的螺母主体无法二次回料使用的情况，使得螺母主体能够更好地二次回料使用。而且这样设置，避免了现有技术中螺母组 件进行嵌件注塑时连接板和螺母主体的连接位置因工艺原因存在较多飞边，导致螺母组件受损的情况，提高了螺母组件的可靠性和稳定性。
附图说明
构成本申请的一部分的说明书附图用来提供对本申请的进一步理解，本申请的示意性实施例及其说明用于解释本申请，并不构成对本申请的不当限定。在附图中：
图1示出了本申请的实施例提供的螺母组件的结构示意图；
图2示出了图1的螺母组件中的螺母和限位凸台的结构示意图；
图3示出了图1的螺母组件的连接板和限位槽的结构示意图；
图4示出了本申请的另一实施例提供的电子膨胀阀的结构示意图；
图5示出了图4的电子膨胀阀的剖视图；
图6示出了图5所选位置的放大图；
图7示出了本申请的实施例提供的另一螺母组件的结构示意图；
图8示出了本申请的实施例提供的另一螺母组件的结构示意图；
图9示出了图8中的部分结构示意图；
图10示出了图4中的转子组件的示意图；
图11示出了图10中的部分结构的示意图；
图12示出了图10中的导动片的示意图；
图13示出了本申请的实施例提供的另一螺母组件的结构示意图；
图14示出了图13中的螺母示意图；
图15示出了本申请的实施例提供的另一螺母组件的结构示意图；
图16示出了图14的另一视图；
图17示出了图16的仰视图；
图18示出了图13中的连接板示意图；
图19示出了本申请的实施例提供的另一螺母组件的结构示意图；
图20示出了图19的螺母组件的俯视图；
图21示出了图20的螺母的夹角标注示意图；
图22示出了本申请的另一实施例提供的电子膨胀阀的结构示意图；
图23示出了图22中的螺母的剖视图；
图24示出了图22中的局部放大图一；
图25示出了图22中的局部放大图二；
图26示出了图22中的转子组件的结构示意图。
其中，上述附图包括以下附图标记：
10、螺母；11、螺母主体；111、螺母段；112、过渡段；113、连接段；114、脱模平面；115、导向斜面；12、限位板；13、螺旋导槽；15、配合槽；151、第一卡槽；152、第二卡槽；013、切除面；0131、第一平面；0132、第二平面；0133、第三平面；0134、第四平面；1101、定位孔；1102、止挡面；
030、平衡通道；031、第一凹槽；032、第二凹槽；
20、连接板；21、平衡槽；021、连接环；201、毛刺面；
31、限位凸台；311、第一限位面；312、第一配合面；32、限位槽；321、第二限位面；322、第二配合面；
40、阀体组件；41、阀盖；42、阀座；421、定位凸台；422、阀口；040、阀口件；042、本体；0421、第一轴段；0422、第二轴段；0423、第三轴段；4221、第一阶梯面；4222、第二阶梯面；
411、第一限位块；412、限位圈；4121、弧形件；4122、第一折钩；4123、第二折钩；4124、第一止挡面；43、第二限位块；431、第二止挡面；
50、导向套；
60、阀针组件；
70、止挡圈；71、螺旋件；72、第三折钩；73、第四折钩；
831、第一限位部；832、第二限位部；833、第三限位部；834、第四限位部；35、第五限位部；36、第六限位部；
90、转子组件；91、转子连接板；92、导动片；921、压装段；922、限位段；93、磁转子；94、压装槽；95、限位件。
具体实施方式
下面将结合本申请实施例中的附图，对本申请实施例中的技术方案进行清楚、完整地描述。显然，所描述的实施例仅仅是本申请一部分实施例，而不是全部的实施例。以下对至少 一个示例性实施例的描述实际上仅仅是说明性的，决不作为对本申请及其应用或使用的任何限制。基于本申请中的实施例，本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实施例，都属于本申请保护的范围。
如图1至图3所示，本申请的实施例提供了一种螺母组件，包括：螺母10，螺母10包括相互连接的螺母主体11和限位板12，限位板12的径向尺寸大于螺母主体11的径向尺寸；连接板20，连接板20可拆卸地套设在螺母主体11上，连接板20和限位板12抵接。
在本实施例中，将螺母组件的螺母主体11和连接板20分体设置，使得连接板20可拆卸地套接在螺母主体11的外周面上并和限位板12抵接，避免了现有技术中对螺母组件进行嵌件注塑时需要放入连接板的情况，使得螺母主体11和连接板20能够分别独立加工成型并组合在一起，提高了生产效率，同时避免了带有连接板的螺母主体无法二次回料使用的情况，使得螺母能够更好地二次回料使用。而且这样设置，避免了现有技术中螺母组件进行嵌件注塑时连接板和螺母主体的连接位置因工艺原因存在较多飞边，导致螺母组件受损的情况，提高了螺母组件的可靠性和稳定性。
如图2和图3所示，限位板12或螺母主体11上具有第一限位结构，连接板20上具有第二限位结构，第一限位结构和第二限位结构限位配合，以限定连接板20和螺母10在周向上的相对位置。这样设置，通过第一限位结构和第二限位结构的限位配合对连接板20和螺母在周向上的相对位置进行限位，使得连接板20和螺母在安装完成后不会发生相对转动，保证螺母组件的可靠性。
具体地，第一限位结构包括设置在螺母主体11外壁的限位凸台31，第二限位结构包括设置在连接板20内壁的限位槽32，限位凸台31位于限位槽32内。这样设置，通过将螺母主体11外壁的限位凸台31卡入连接板20内壁的限位槽32内，对连接板20和螺母在周向上的相对位置进行限制，使得连接板20和螺母在安装完成后不会发生相对转动，保证螺母组件的可靠性。同时，采用限位凸台31和限位槽32的卡接的限位方式，便于对限位凸台31和限位槽32的加工，限位效果好。
具体地，限位凸台31为多个，多个限位凸台31围绕螺母主体11设置，限位槽32为多个，多个限位槽32和多个限位凸台31一一对应设置。这样设置，通过多组限位凸台31和限位槽32的限位配合，提高了第一限位结构和第二限位结构限位配合后的结构强度，同时通过多个限位槽32和多个限位凸台31的一一对应，也能更好地对连接板20和螺母主体11的相对位置进行确定，防止连接板20和螺母主体11偏心设置。
进一步地，螺母主体11包括依次连接的螺母段111、过渡段112和连接段113，连接段113的径向尺寸大于螺母段111的径向尺寸，螺母段111内具有内螺纹，连接段113和限位板12连接，连接板20可拆卸地套设在连接段113上。
在本实施例中，连接板20套设在连接段113上并和限位板12抵接，限位凸台31设置在限位板12和连接段113上，限位槽32设置在连接板20的内圈上，这样设置，便于将螺母组件小型化，同时便于限位凸台31和限位槽32的限位配合。
如图4至图6所示，本申请的另一实施例提供了一种电子膨胀阀，电子膨胀阀包括阀体组件40和上述的螺母组件，螺母组件位于阀体组件40内。
如图4所示，阀体组件40包括相互连接的阀盖41和阀座42，螺母主体11的至少一部分位于阀盖41的腔体内，限位板12位于阀座42的腔体内，连接板20的外侧壁和阀座42的内侧壁焊接。
在本实施例中，螺母主体11的螺母段111和过渡段112均位于阀盖41的腔体内，螺母主体11的连接段113部分位于阀盖41的腔体内，另一部分位于阀座42的腔体内，限位板12位于阀座42的腔体内。连接板20的外径大于螺母主体11的最大外径，连接板20的外侧壁和阀座42的内侧壁焊接连接，防止螺母组件在阀体组件40的腔体内的移动，保证电子膨胀阀的可靠性和稳定性。
如图5和图6所示，阀座42具有开口，连接板20设置在开口处，连接板20背离阀座42腔体的一侧和开口所在平面之间的距离为L，L≥0.02mm，连接板20的厚度为t，L＜0.4t。这样设置，连接板20的一部分穿过开口位于阀座42的腔体内，另一部分则位于阀盖41的腔体内，对L和t的数值范围进行限定，确保连接板20和阀座42的连接后能形成环形台阶，在连接板20和阀座42连接的环形位置处形成焊接点，避免连接板20和阀座42之间形成的台阶高度过低导致焊接不可靠的情况，保证连接板20和阀座42焊接连接的可靠性。
具体地，连接板20具有平衡孔或平衡槽21，阀座42的腔体和阀盖41的腔体通过平衡孔或平衡槽21连通。
在本实施例中，阀座42的开口和阀盖41的腔体连通，在安装螺母组件后，阀座42的腔体和阀盖41的腔体被螺母组件间隔开，通过在连接板20上设置平衡孔或平衡槽21，以连通阀盖41的腔体和阀座42的腔体，实现阀体组件40内的压力平衡，保证电子膨胀阀的可靠性。
具体地，电子膨胀阀还包括导向套50和阀针组件60，螺母10具有定位孔，定位孔内具有止挡面，导向套50的一端穿入定位孔，导向套50的端面和止挡面抵接，阀针组件60和螺母主体11螺纹连接，且阀针组件60穿过导向套50。
在本实施例中，阀针组件60可移动地穿设在导向套50内，阀针组件60的螺杆和螺母主体11的内螺纹螺纹连接，螺母的定位孔贯穿整个螺母设置，定位孔内具有止挡面，导向套50的一端和止挡面抵接，导向套50的外侧壁和定位孔的内侧壁限位配合，这样设置，通过止挡面和导向套50配合，实现了对螺母的定位作用，通过导向套50对螺母组件整体进行定位和轴向限位，可以更好地确保阀座42和螺母组件之间的同轴度，提高了电子膨胀阀的防内泄露性能。
进一步地，阀座42的内壁具有定位凸台421，定位凸台421内具有阀口422，定位凸台421穿入导向套50远离螺母10的一端，定位凸台421、导向套50、定位孔和阀针组件60同轴设置。这样设置，可以保证阀盖41和阀座42之间的同轴度，保证电子膨胀阀的可靠性。
可选地，定位凸台421和阀座42为一体结构，或定位凸台421和阀座42为分体结构。
具体地，电子膨胀阀还包括转子组件，转子组件设置在阀盖41的腔体内并和阀针组件连接、和螺母组件止挡配合。电子膨胀阀的安装过程如下，先将连接好的阀针组件60和螺母组件与阀座42安装在一起，也即让螺母定位孔内侧壁和导向套50的外侧壁限位配合，之后将连接板20套设在连接段113上，对连接板20施加朝向限位板12的力，使得连接板20和限位板12抵接，并带动整个螺母组件向阀座42的腔体内移动，直至止挡面和导向套50的一端抵接，此时连接板20和阀座42的侧壁之间形成台阶，并在连接板20和阀座42的连接位置进行焊接，之后将转子组件和阀针组件固定连接，最后再将阀盖41和阀座42固定连接，完成电子膨胀阀的安装。
如图7至图9所示，螺母10具有内螺纹，螺母10的外周面上具有螺旋导槽13；螺母组件还包括止挡圈70，止挡圈70套设在螺旋导槽13内，止挡圈70可沿螺旋导槽13转动。通过设置螺旋导槽13，避免了现有技术中螺母、止挡圈和限位弹簧装配复杂的问题，不需要再安装限位弹簧，简化了安装过程，便于实现止挡圈70和螺母10的自动化安装，进一步提高了螺母组件的生产效率。
其中，螺母组件还包括第三限位结构，第三限位结构设置在螺母主体11的外周面上，第三限位结构位于螺旋导槽13背离连接板20的一侧，第三限位结构和止挡圈70止挡配合。这样设置，可对止挡圈70在螺旋导槽13上的移动进行限位，防止止挡圈70在螺旋导槽13内朝背离连接板20的一侧移动时从螺旋导槽13内脱出，保证止挡圈70移动的可靠性。
具体地，第三限位结构为第一限位块411，第一限位块411凸出设置在螺母主体11的外周面上，第一限位块411和止挡圈70止挡配合，第一限位块411和螺母主体11为一体结构。
这样设置，便于螺母组件的加工，通过第一限位块411对止挡圈70在螺旋导槽13上的移动进行限位，防止止挡圈70在螺旋导槽13内朝朝背离连接板20的一侧移动时从螺旋导槽13内脱出的情况，同时还可以避免现有技术中螺母组件内的限位弹簧不良导致上止挡失效的情况，保证螺母主体11和第一限位块411连接的可靠性的同时保证了止挡圈70移动的可靠性。
或者，第三限位结构为限位圈412，限位圈412包括弧形件4121和设置在弧形件4121两端的第一折钩4122、第二折钩4123，第一折钩4122位于弧形件4121背离止挡圈70的一侧，第二折钩4123位于弧形件4121朝向止挡圈70的一侧，弧形件4121和第一折钩4122均和螺母主体11连接，第二折钩4123和止挡圈70止挡配合。
在本实施例中，通过设置限位圈412，可以先将止挡圈70装配在螺母主体11上，之后再安装限位圈412，这样设置，便于实现止挡圈70和螺母主体11的自动化安装，进一步提高了螺母组件的生产效率。避免了止挡圈70与限位圈412的弧形件4121直接止挡的情况，防止止挡圈70的一端具有毛刺等对弧形件4121造成损伤，保证限位圈412的可靠性。
具体地，螺母主体11的外周面具有配合槽15，弧形件4121和/或第一折钩4122与配合槽15限位配合；配合槽15包括第一卡槽151和第二卡槽152，第一卡槽151为弧形槽，第一卡槽151沿螺母主体11的周向延伸设置，第二卡槽152沿螺母主体11的轴向延伸，弧形件4121和第一卡槽151卡接，第一折钩4122和第二卡槽152卡接。
这样设置，通过弧形件4121和第一卡槽151的卡接，对限位圈412在沿螺母主体11的轴线方向上的移动进行限制，通过第一折钩4122和第二卡槽152的卡接，对限位圈412在螺母主体11周向上的转动进行限制，保证限位圈412连接的可靠性。
进一步地，第三限位结构具有凸出螺母主体11外周面的第一止挡面4124，止挡圈70和第一止挡面4124止挡配合；第四限位结构，第四限位结构设置在螺母主体11上，第四限位结构具有凸出螺母主体11外周面的第二止挡面431，止挡圈70和第二止挡面431止挡配合；其中，螺旋导槽13位于第三限位结构和第四限位结构之间。
在本实施例中，通过设置凸出螺母主体11外周面的第一止挡面4124、第二止挡面431，并使止挡圈70分别和第一止挡面4124、第二止挡面431止挡配合，使得止挡圈70和第一止挡面4124之间的止挡位置以及止挡圈70和第二止挡面431之间的止挡位置凸出螺旋导槽13设置，避免了现有技术中止挡圈70和第一止挡面之间的止挡位置以及止挡圈70和第二止挡面之间的止挡位置位于螺旋导槽13内或螺旋导槽13的延长线上的情况，防止止挡圈70在止挡撞击后产生粉末等进入螺旋导槽13内导致止挡圈70卡死的情况，保证止挡圈70移动的可靠性。
具体地，第三限位结构和第四限位结构分别对止挡圈70沿螺母主体11的轴线的两个方向进行限位。第一止挡面4124和第二止挡面431均避让螺旋导槽13或螺旋导槽13的延长线设置。这样设置，保证止挡圈70和第一止挡面的止挡位置以及止挡圈70和第二止挡面的止挡位置均不在螺旋导槽13内或螺旋导槽13的延长线上，防止止挡圈70在止挡撞击后产生粉末等进入螺旋导槽13内导致止挡圈70卡死的情况，保证止挡圈70移动的可靠性。
其中，止挡圈70包括螺旋件71和分别设置在螺旋件71两端的第三折钩72、第四折钩73，螺旋件71位于螺旋导槽13内，第三折钩72和第三限位结构止挡配合，第四折钩73和第四限位结构止挡配合。
在本实施例中，通过设置第三折钩72、第四折钩73，将现有技术中的止挡圈的两端止挡变成两折钩止挡，增大了止挡面积，可确保止挡撞击的过程中不产生或产生较少的粉末，确保螺母组件的性能。
具体地，第三折钩72朝远离螺母主体11外周面的方向延伸，第四折钩73位于螺旋件71朝向第四限位结构的一侧，第四折钩73沿螺母主体11的轴线方向延伸；在本实施例中，第三折钩72垂直于螺母主体11的轴线设置，第四折钩73倾斜设置，这样设置，便于将止挡圈70的止挡位置凸出螺旋导槽13设置。
其中，第四限位结构为第二限位块43，第二止挡面431位于第二限位块43的外侧壁上，止挡圈70和第二限位块43的外侧壁止挡配合。
进一步地，螺母主体11的一端具有导向斜面115，导向斜面115用于在装配限位圈412时进行导向。这样设置，便于对止挡圈70以及限位圈412在螺母主体11上的安装进行导向，便于实现螺母组件的自动化安装。
进一步地，螺母组件还包括第二限位块43，第二限位块43凸出设置在螺母主体11的外周面上，第二限位块43位于螺旋导槽13朝向连接板20的一侧，第二限位块43和止挡圈70止挡配合，第二限位块43和螺母主体11为一体结构。
这样设置，便于螺母组件的加工，通过第二限位块43对止挡圈70在螺旋导槽13上的移动进行限位，防止止挡圈70在螺旋导槽13内朝朝向连接板20的一侧移动时从螺旋导槽13内脱出的情况，同时还可以避免现有技术中螺母组件内的限位弹簧不良导致下止挡失效的情况，保证螺母主体11和第二限位块43连接的可靠性的同时保证了止挡圈70移动的可靠性。具体地，第一限位块411和第二限位块43分别对止挡圈70的轴向移动的两个方向进行限制，保证螺母组件的可靠性。
进一步地，螺母主体11包括螺母段111，螺母段111的外周面上具有两个相对设置的脱模平面114，脱模平面114沿螺母段111的轴线方向设置，螺旋导槽13设置在螺母段111的位于两个脱模平面114之间的外周面上。通过设置脱模平面114，便于螺母主体11的加工和脱模，实现螺母主体11生产的自动化，提高螺母组件的生产效率。
如图4、图10至图12所示，电子膨胀阀还包括转子组件90，转子组件90包括转子连接板91、导动片92和筒状的磁转子93，转子连接板91位于磁转子93的腔体内并和磁转子93固定连接，导动片92位于磁转子93的腔体内并和转子连接板91固定连接，导动片92和止挡圈70限位配合。在本实施例中，转子连接板91和磁转子93在外部线圈的驱动下进行同步旋转，带动与转子连接板91固定连接的导动片92同步转动且沿螺母主体11的轴线方向移动，在导动片92的运动过程中，导动片92和止挡圈70抵接，进而带动止挡圈70在螺母主体11上螺旋运动。具体地，导动片92与磁转子93的腔体内侧壁之间具有间隙，或，导动片92与磁转子93的腔体内侧壁之间没有间隙。可选地，导动片92和磁转子93之间可以没有间隙，此时的导动片的材质和上述导动片的材质不同。这样设置，避免了现有技术中粉末冶金的转子连接板与导动片需要激光焊接，焊后易出现发黑、裂纹等不良的情况，保证了转子组件90的可靠性。
其中，转子连接板91具有压装槽94，导动片92包括相互连接的压装段921和限位段922，压装段921和限位段922相互垂直，压装段921位于压装槽94内，限位段922沿螺母10的轴向延伸并和止挡圈70限位配合；电子膨胀阀还包括阀针组件60，阀针组件60和螺母主体11螺纹连接，阀针组件60和转子组件90固定连接。通过压装段921和压装槽94之间的限位配合实现了转子连接板91和导动片92的固定连接，无需焊接连接，降低了加工成本。可选地，压装段921和压装槽94过盈配合，压装槽94是矩形槽。
如图13至图15所示，连接板20和螺母10之间具有平衡通道030，平衡通道030将连接板20两侧的区域连通。在本实施例中，通过平衡通道030实现连接板20两侧区域的连通，进而实现连接板20两侧区域的压力平衡，避免了现有技术中的螺母组件在装入阀体组件后，配合板和螺母将配合板两侧的腔体区域间隔开，导致配合板两侧腔体区域压力不平衡的情况，保证螺母组件在装入阀体组件后工作的可靠性和稳定性。
具体地，第一限位结构位于螺母主体11，第一限位结构具有第一凹槽031，限位板12具有第二凹槽032，第一凹槽031和第二凹槽032形成平衡通道030；在本实施例中，第一凹槽031设置在第一限位结构上，第二凹槽032设置在限位板12上，便于对第一限位结构、限位板12的加工的同时，减小了第一限位结构和限位板12的整体尺寸，保证螺母组件的小型化，提高螺母组件的生产效率。
或者，第一限位结构具有第一凹槽031，第二限位结构具有第三凹槽，第一凹槽031和第三凹槽形成平衡通道030。第一凹槽031设置在第一限位结构上，第三凹槽设置在第二限位结构上，便于对第一限位结构、第二限位结构的加工的同时，减小了第一限位结构和第二限位结构的整体尺寸，保证螺母组件的小型化，提高螺母组件的生产效率。具体地，第三凹槽要避让限位板12设置，保证连通后的第一凹槽031和第三凹槽能够将连接板20两侧的区域连通，保证平衡通道030的可靠性。
在另一实施例中，螺母主体11的外壁具有切除面013，平衡通道030位于切除面013和连接板20的内壁之间。这样便于对螺母主体11的加工切除，提高螺母10的生产效率。具体地，切除面013的位置可以为螺母主体11合模成型时合模线所在位置，在为了加工平衡通道030对螺母主体11的外周进行切除的同时，将螺母主体11外周的合模线去除，防止合模线对止挡圈绕螺母主体11周向的转动产生影响，保证螺母组件的可靠性。
具体地，螺母主体11包括依次连接的螺母段111、过渡段112、连接段113，限位板12的最大径向尺寸大于连接段113的最大径向尺寸，切除面013包括依次连接的第一平面0131、第二平面0132、第三平面0133和第四平面0134，第一平面0131位于螺母段111，第二平面0132位于过渡段112，第三平面0133位于连接段113，第四平面0134位于限位板12；其中，第三平面0133和第四平面0134共面设置，平衡通道030位于第三平面0133和连接板20的内壁之间。
在本实施例中，第一平面0131、第二平面0132、第三平面0133和第四平面0134依次连接，使得第一平面0131、第二平面0132、第三平面0133和第四平面0134可以一次切除成型，便于对螺母主体11的切除加工，提高螺母主体11的加工和生产效率。具体地，第三平面0133和第四平面0134共面设置，防止位于第三平面0133和连接板20之间的平衡通道030被第四平面0134封堵，保证平衡通道030连通的可靠性。
如图13、图16至图18所示，连接板20和螺母10在周向上过盈配合，连接板20和螺母10在径向上间隙配合。
通过该方案，使得螺母10上的连接板20可以沿螺母10的径向移动但不能沿螺母10的周向转动，避免了相关技术中螺母组件在装入阀体组件的过程中，由于连接板20和阀体组件也是紧密配合，导致螺母10在径向上的过定位，不能保证螺母组件和阀体组件之间的同轴度的情况，提高了螺母组件和阀体组件的同轴度，减小了螺母组件的加工精度和加工成本，降低了螺母组件的装配难度，提高螺母组件的生产效率。
螺母主体11上设置有第一限位结构，连接板20包括连接环021和设置在连接环021上的第二限位结构，其中，连接环021套设在螺母主体11上，连接环021和螺母主体11间隙配合，第一限位结构和第二限位结构在连接环021的径向间隙配合，第一限位结构和第二限位结构在连接环021的周向过盈配合。这样设置，通过第一限位结构和第二限位结构之间的限位配合实现连接板20和螺母10之间的限位配合，且将第一限位结构直接设置在螺母10上，第二限位结构直接设置在连接板20上，便于加工的同时减小了第一限位结构和第二限位结构的整体尺寸，保证螺母组件的小型化。
具体地，第一限位结构包括设置在螺母主体11外壁的限位凸台31，第二限位结构包括设置在连接板20内壁的限位槽32，限位凸台31位于限位槽32内。在本实施例中，将第一限位结构和第二限位结构之间的限位配合主要设计为限位凸块和限位槽之间的限位配合，结构简单，便于加工，配合可靠。
限位凸台31具有两个第一限位面311和位于两个第一限位面311之间的第一配合面312，限位槽32具有两个第二限位面321和位于两个第二限位面321之间的第二配合面322；其中，第一配合面312和第二配合面322间隙配合，两个第一限位面311和两个第二限位面321一一对应地限位配合。
在本实施例中，通过第一配合面312和第二配合面322的间隙配合，使得连接板20能够沿螺母主体11的径向上发生细微移动，通过两个第一限位面311和两个第二限位面321一一对应地限位配合，使得连接板20沿螺母主体11的周向上的转动被限制，避免出现连接板20过定位的情况，便于对限位凸台和限位槽的加工成型，结构简单，配合可靠。具体地，两个第一限位面311和两个第二限位面321一一对应地过盈配合。
具体地，两个第一限位面311、两个第二限位面321均平行设置，两个第一限位面311之间的距离为L1，两个第二限位面321之间的距离为L2，L1-L2≥0.03mm；这样设置，使得套设在螺母主体11外周面上的限位槽的宽度小于螺母主体11上的限位凸块的宽度，保证第一限位面311和第二限位面321之间过盈配合的可靠性。具体地，避免了当L1-L2＜0.03mm时，限位凸块和限位槽之间的过盈量不足以对连接板20沿螺母主体11周向上的转动进行限制的情况，保证限位凸块和限位槽之间过盈配合的可靠性。
进一步地，第一配合面312和第二配合面322为同轴设置的弧形面，第一配合面312的直径d3，第二配合面322的直径为d4，d4-d3≥0.1mm；这样设置，使得套设在螺母主体11外周面上的限位槽的深度大于螺母主体11上的限位凸块的长度，保证第一配合面312和第二配合面322之间间隙配合的可靠性。具体地，避免了当d4-d3＜0.1mm时，限位凸块和限位槽之间的间隙量不足以使连接板20能够沿螺母主体11径向移动的情况，保证限位凸块和限位槽之间间隙配合的可靠性。
螺母主体11的最大直径为d1，连接环021的内径为d2，d2-d1≥0.1mm；这样设置，使得螺母主体11的最大径向尺寸大于连接环021的内径，保证连接环021沿螺母主体11径向移动的可靠性。具体地，避免了当d2-d1＜0.1mm时，连接环021的内侧壁和螺母主体11的外 侧壁紧配，导致连接板20不能沿螺母主体11径向移动的情况，保证连接板20和螺母10之间间隙配合的可靠性。
在螺母10的轴向上，限位凸台31的尺寸大于连接板20的厚度。这样设置，可以保征限位凸台对连接板20的限位效果。
如图19至图21所示，在另一实施例中，螺母10和连接板20之间设置有防呆结构，防呆结构用于限定连接板20在螺母10上的安装位置。
在本实施例中，将连接板20和螺母10分体设置，避免了现有技术中对螺母组件进行嵌件注塑时需要放入连接板的情况，提高了生产效率，同时避免了带有连接板的螺母无法二次回料使用的情况，使得螺母能够更好地二次回料使用。而且这样设置，避免了现有技术中螺母组件进行嵌件注塑时连接板和螺母的连接位置因工艺原因存在较多飞边，导致螺母组件受损的情况，提高了螺母组件的结构强度。通过设置防呆结构，可使得连接板20和螺母10具有唯一正确的装配位置，若位置不对则无法完成装配，避免了连接板20在套设螺母10的过程中装反的情况，保证了螺母组件的装配质量。
具体地，防呆结构包括设置在螺母主体11上的第一限位部831、第二限位部832以及设置在连接板20上的第三限位部833、第四限位部834，第一限位部831和第三限位部833限位配合，第二限位部832和第四限位部834限位配合；其中，连接板20具有毛刺面201，防呆结构限定毛刺面201背离限位板12。
在本实施例中，连接板20可拆卸地套设在螺母主体11上并和限位板12抵接，连接板20的毛刺面201通过第一限位部831、第三限位部833及第二限位部832、第四限位部834之间的限位配合背离限位板12，避免了现有技术中操作人员在安装连接板的过程中无法准确地判断连接板的毛刺面位于哪一侧，导致连接板安装完成后毛刺面和限位板抵接的情况，保证螺母组件的装配质量。
其中，第一限位部831包括第一限位凸块，第二限位部832包括第二限位凸块，第三限位部833包括第一限位槽，第四限位部834包括第二限位槽，第一限位凸块卡入第一限位槽，第二限位凸块卡入第二限位槽，其中，第一限位凸块和第二限位凸块尺寸不相等；在螺母10的周向上，第一限位凸块的尺寸大于第二限位凸块的尺寸，第一限位槽和第二限位槽在连接板20的周向上具有夹角A，0°＜A＜180°。
这样设置，进一步对第一限位凸块和第二限位凸块的尺寸和位置关系进行限定，防止当第一限位槽和第二限位槽之间的夹角A＝180°时，连接板20绕径向翻转后第一限位凸块、第一限位槽及第二限位凸块、第二限位槽之间依然能够限位配合，但毛刺面201朝向限位板12的情况，保证连接板20的装配的可靠性，保证螺母组件的装配质量。
或者，防呆结构还包括设置在螺母10上的第五限位部35和设置在连接板20上的第六限位部36，其中，第二限位部832位于第一限位部831和第五限位部35之间，第四限位部834位于第三限位部833和第六限位部36之间，第五限位部35和第六限位部36配合。
在本实施例中，螺母组件通过三组限位部之间的不同位置的限位配合来保证连接板20和螺母10装配的可靠性，保证螺母组件的装配质量。具体地，第一限位部831、第二限位部832和第五限位部35沿螺母10的周向间隔设置，第三限位部833、第四限位部834和第六限位部36沿连接板20的轴向间隔设置。
具体地，第五限位部35包括第三限位凸块，第六限位部36包括第三限位槽，第三限位凸块卡入第三限位槽，其中，第一限位部831和第五限位部35的尺寸均大于第二限位部832的尺寸。
在本实施例中，将两个限位部之间的限位配合主要设计为限位凸块和限位槽之间的限位配合，结构简单，便于加工，配合可靠。第一限位部831和第五限位部35的尺寸均大于第二限位部832的尺寸，对应地，第三限位部833和第六限位部36的尺寸均大于第四限位部834，这样设置，避免了当第一限位凸块或第三限位凸块与第二限位凸块尺寸相等时，连接板20绕径向翻转后使得毛刺面201朝向限位板12，但第一限位凸块和第一限位槽以及第二限位凸块、第二限位槽，或，第三限位凸块、第三限位槽以及第二限位凸块、第二限位槽第之间依然能够限位配合的情况；或，避免了当第一限位凸块、第二限位凸块和第三限位凸块尺寸均相等时，连接板20绕径向翻转后使得毛刺面201朝向限位板12，但第一限位凸块、第一限位槽，第二限位凸块、第二限位槽以及第三限位凸块、第三限位槽两两之间依然能够限位配合的情况，保证连接板20的装配的可靠性，保证螺母组件的装配质量。
在螺母10的周向上，第一限位部831的径向尺寸小于第五限位部35的尺寸；第二限位部832和第一限位部831在连接板20的周向上具有夹角B，第二限位部832和第五限位部35在连接板20的周向上具有夹角C，其中，B＝C＝90°；这样设置，进一步对第一限位凸块、第二限位凸块和第三限位凸块的尺寸和位置关系进行限定，保证连接板20的装配的可靠性，保证螺母组件的装配质量。
第二限位部832和第一限位部831在连接板20的周向上具有夹角B，第二限位部832和第五限位部35在连接板20的周向上具有夹角C，其中，0°＜B＜90°，B+C＝180°。
在本实施例中，第一限位部831和第五限位部35的尺寸均大于第二限位部832的尺寸，第一限位部831和第五限位部35的尺寸相同，通过0°＜B＜90°，B+C＝180°，避免了当第一限位部831和第五限位部35之间夹角为180°，第二限位部832和第一限位部831、第五限位部35之间的夹角均为90°时，翻转连接板20使得毛刺面201朝下，再将连接板20沿轴向旋转一定角度后，使得第一限位部831和第六限位部36限位配合、第二限位部832和第四限位部834限位配合、第三限位部833和第五限位部35限位配合，使得连接板20依然能够安装的情况，保证连接板20的装配的可靠性，保证螺母组件的装配质量。
如图22至26所示，在另一实施例中，电子膨胀阀中的连接板20和螺母10在径向上间隙配合；阀体组件40包括阀座42，连接板20的外侧壁和阀座42固定连接，连接板20和阀座42在螺母10的轴向间隙配合；电子膨胀阀还包括导向套50，导向套50固定设置在阀座 42的腔体内，导向套50和螺母10插接，导向套50和螺母10在轴向上抵接且在径向上过盈配合。
在本实施例中，通过限制导向套50和螺母10之间在轴向和径向上的相对移动，保证了导向套50和螺母10的同轴度，进一步地，在螺母10和导向套50的同轴度确定的情况下，给与连接板20、螺母10之间以及连接板20、阀座42之间足够的调节间隙，防止连接板20在安装过程中过定位导致对螺母10和导向套50之间的同轴度产生影响，提高螺母组件的同轴度。具体地，连接板20和螺母10在径向上间隙配合，在螺母组件在安装过程中，当导向套50和螺母10抵接时，连接板20和阀座42在螺母10的轴向上有间隙，避免了相关技术中当导向套和螺母抵接时，连接板和阀座在螺母的轴向上也抵接，导致螺母过定位的情况，同时也避免了连接板和阀座在螺母的轴向上先抵接，导向套和螺母并未抵接，导致螺母组件定位不准确的情况，提高了电子膨胀阀中螺母组件的安装精度，保证电子膨胀阀的性能。
其中，螺母10具有定位孔1101，定位孔1101内具有止挡面1102，导向套50的一端穿入定位孔1101，导向套50的端面和止挡面1102抵接，导向套50的外壁和定位孔1101的内壁过盈配合；或导向套50具有定位孔1101，定位孔1101内具有止挡面1102，螺母10的一端穿入定位孔1101，螺母10的端面和止挡面1102抵接，螺母10的外壁和定位孔1101的内壁过盈配合。这样设置，便于对螺母10和导向套50的加工，提高电子膨胀阀的生产效率。具体地，本实施例为螺母10具有定位孔1101，导向套50的一端穿入定位孔1101的情况。
在本实施例中，电子膨胀阀还包括设置在阀座42内的定位凸台421，定位凸台421和导向套50远离螺母10的一端插接，定位凸台421和导向套50在轴向上抵接且在径向上过盈配合。这样设置，通过定位凸台421和导向套50的限位配合，保证了定位凸台421和导向套50之间的同轴度，进而保证了阀座42、导向套50和螺母组件之间的同轴度，保证电子膨胀阀的性能。
具体地，定位凸台421和阀座42为一体结构；或，电子膨胀阀包括阀口件040，阀口件040包括定位凸台421以及和定位凸台421连接的本体042，阀口件040还具有贯穿本体042和定位凸台421的阀口，本体042和阀座42固定连接，定位凸台421穿入导向套50远离螺母10的一端，定位凸台421和导向套50过盈配合，导向套50和本体042抵接。
在本实施例中，定位凸台421和阀座42为分体结构，通过阀口件040对导向套50的安装位置进行定位和安装，保证导向套50和阀座42的同轴度，具体地，阀座42的轴线穿过阀口的中心设置，通过上述设置，保证了螺母组件和阀口的同轴度，保证电子膨胀阀的可靠性。
进一步地，本体042包括依次连接的第一轴段0421、第二轴段0422和第三轴段0423，第一轴段0421、第二轴段0422和第三轴段0423的外径依次减小，第一轴段0421和定位凸台421连接；阀座42具有相互连通的第一配合孔和第二配合孔，第一配合孔的直径大于第二配合孔的直径；其中，第一轴段0421穿入第一配合孔内，第二轴段0422穿过第二配合孔，第三轴段0423位于阀座42外。这样设置，保证了本体042和阀座42之间连接的可靠性，保证本体042和阀座42的同轴度，进而保证导向套50和阀座42的同轴度。
阀座42的内侧壁具有平行于螺母10轴线的第一阶梯面4221和垂直于螺母10轴线的第二阶梯面4222，第一阶梯面4221和第二阶梯面4222形成台阶结构，连接板20的外侧壁和第一阶梯面4221连接，连接板20和第二阶梯面4222间隙配合。
这样设置，在螺母组件在安装过程中，当导向套50和止挡面1102抵接时，连接板20和阀座42在螺母的轴向上有间隙，避免了相关技术中当导向套和止挡面抵接时，连接板和阀体在螺母的轴向上也抵接，导致螺母组件过定位的情况，同时也避免了相关技术中连接板和阀体在螺母的轴向上先抵接，导向套和止挡面并未抵接，导致螺母组件定位不准确的情况，提高了电子膨胀阀中螺母组件的安装精度，保证导向套50和止挡面1102的抵接对螺母组件定位的可靠性，进而提高了电子膨胀阀可靠性。进一步地，通过台阶结构对连接板20进行定位安装，便于加工和装配定位。
连接板20的一部分位于台阶结构内，连接板20的另一部分位于台阶结构外，连接板20和阀座42焊接。在本实施例中，第一阶梯面4221和阀座42的端面连接，连接板20和阀座42的焊接位置为连接板20未和第一阶梯面4221抵接的平面(即连接板20未位于台阶结构内的一部分的外侧壁)以及与第一阶梯面4221连接的阀座42的端面之间形成的贴合线位置。这样设置，为连接板20和阀座42的焊接预留出焊接余量，保证连接板20和阀座42焊接的可靠性。进一步地，连接板20和阀座42焊接连接，连接稳定可靠。
阀体组件40还包括阀盖41，电子膨胀阀还包括转子组件90，阀盖41和阀座42连接，转子组件90设置在阀盖41内，转子组件90包括磁转子93和设置在磁转子93内的转动连接件，转动连接件包括相互连接的转子连接板91和导动片92，转子连接板91和磁转子93固定连接，导动片92沿螺母10的轴向延伸；螺母组件还包括可转动地设置在螺母10上的止挡圈70，导动片92的侧壁和止挡圈70限位配合。
在本实施例中，转子连接板91和磁转子93在外部线圈的驱动下进行同步旋转，在导动片92的运动过程中，导动片92和止挡圈抵接，进而带动止挡圈在螺母10上螺旋运动。这样设置，避免了现有技术中粉末冶金的转子连接板与导动片需要激光焊接，焊后易出现发黑、裂纹等不良的情况，保证了转子组件90的可靠性。
转动连接件为一体结构，或转子连接板91、导动片92为两个单独的结构；导动片92和磁转子93的内壁间隙配合，或导动片92和磁转子93的内壁贴合。本实施例中的转动连接件为一体结构，便于转动连接件的加工，提高转子组件的生产效率。同时，在本实施例中，导动片92和磁转子93之间没有间隙，此时的导动片92的材质和二者之间有间隙时导动片92的材质不同。
具体地，转子组件90还包括限位件95，转子连接板91具有压装槽94，限位件95设置在压装槽94内；螺母10的一部分位于磁转子93内，电子膨胀阀还包括阀针组件60，阀针组件60的螺杆和限位件95焊接，螺杆和螺母10螺纹连接。这样设置，通过限位件95将阀针组件60和转子连接板91固定连接在一起，降低了加工成本。同时，将转子组件90中的各部分分体设置并将转动连接件设置为一体结构，避免了现有技术中嵌件安装的粉末冶金的转子 组件在与阀针部件焊接时，易受热、出现开裂、退磁等不良现象的情况，进一步保证了转子组件90的可靠性。
可选地，限位件95和压装槽94过盈配合或限位件95和压装槽94一体注塑成型，压装槽94是矩形槽，限位件95和阀针组件60的螺杆焊接连接。
可选地，转子连接板91的材质为Pps，Pps转子连接板具有更好的隔热性能，能够防止限位件95和阀针组件60的螺杆焊接时磁转子93开裂的问题。
如图25所示，连接板20和第二阶梯面4222之间具有间隙t1，t1≥0.2mm。这样避免了若t1过小，止挡面1102挤压导向套50使得抵接的平面向导向套50方向细微移动导致t1间隙量被覆盖，使得螺母组件因连接板20和阀体组件的抵接而产生过定位的情况，保证导向套50和止挡面1102的抵接及螺母组件定位的可靠性。
进一步地，连接板20的厚度为t2，t1≤0.3t2。这样设置，避免了若t1过大，导致连接板20的外侧壁无法和阀体组件连接的情况，在保证螺母组件定位的可靠性的同时保证了螺母组件和阀体组件连接的可靠性。
以上所述仅为本申请的优选实施例而已，并不用于限制本申请，对于本领域的技术人员来说，本申请可以有各种更改和变化。凡在本申请的精神和原则之内，所作的任何修改、等同替换、改进等，均应包含在本申请的保护范围之内。

Claims (43)

  1. 一种螺母组件，其特征在于，包括：
    螺母(10)，所述螺母(10)包括相互连接的螺母主体(11)和限位板(12)，所述限位板(12)的径向尺寸大于所述螺母主体(11)的径向尺寸；
    连接板(20)，所述连接板(20)可拆卸地套设在所述螺母主体(11)上，所述连接板(20)和所述限位板(12)抵接。
  2. 根据权利要求1所述的螺母组件，其特征在于，所述限位板(12)或所述螺母主体(11)上具有第一限位结构，所述连接板(20)上具有第二限位结构，所述第一限位结构和所述第二限位结构限位配合，以限定所述连接板(20)和所述螺母(10)在周向上的相对位置。
  3. 根据权利要求2所述的螺母组件，其特征在于，所述第一限位结构包括设置在所述螺母主体(11)外壁的限位凸台(31)，所述第二限位结构包括设置在所述连接板(20)内壁的限位槽(32)，所述限位凸台(31)位于所述限位槽(32)内。
  4. 根据权利要求3所述的螺母组件，其特征在于，所述限位凸台(31)为多个，多个所述限位凸台(31)围绕所述螺母主体(11)设置，所述限位槽(32)为多个，多个所述限位槽(32)和多个所述限位凸台(31)一一对应设置。
  5. 根据权利要求1所述的螺母组件，其特征在于，所述螺母主体(11)包括依次连接的螺母段(111)、过渡段(112)和连接段(113)，所述连接段(113)的径向尺寸大于所述螺母段(111)的径向尺寸，所述螺母段(111)内具有内螺纹，所述连接段(113)和所述限位板(12)连接，所述连接板(20)可拆卸地套设在所述连接段(113)上。
  6. 根据权利要求1所述的螺母组件，其特征在于，所述螺母(10)具有内螺纹，所述螺母(10)的外周面上具有螺旋导槽(13)；所述螺母组件还包括止挡圈(70)，所述止挡圈(70)套设在所述螺旋导槽(13)内，所述止挡圈(70)可沿所述螺旋导槽(13)转动。
  7. 根据权利要求6所述的螺母组件，其特征在于，所述螺母组件还包括第三限位结构，所述第三限位结构设置在所述螺母主体(11)的外周面上，所述第三限位结构位于所述螺旋导槽(13)背离所述连接板(20)的一侧，所述第三限位结构和所述止挡圈(70)止挡配合。
  8. 根据权利要求7所述的螺母组件，其特征在于，所述第三限位结构为第一限位块(411)，所述第一限位块(411)凸出设置在所述螺母主体(11)的外周面上，所述第一限位块(411)和所述止挡圈(70)止挡配合，所述第一限位块(411)和所述螺母主体(11)为一体结构。
  9. 根据权利要求7所述的螺母组件，其特征在于，所述第三限位结构为限位圈(412)，所述限位圈(412)包括弧形件(4121)和设置在所述弧形件(4121)两端的第一折钩(4122)、第二折钩(4123)，所述第一折钩(4122)位于所述弧形件(4121)背离所述止挡圈(70) 的一侧，所述第二折钩(4123)位于所述弧形件(4121)朝向所述止挡圈(70)的一侧，所述弧形件(4121)和所述第一折钩(4122)均和所述螺母主体(11)连接，所述第二折钩(4123)和所述止挡圈(70)止挡配合。
  10. 根据权利要求9所述的螺母组件，其特征在于，所述螺母主体(11)的外周面具有配合槽(15)，所述弧形件(4121)和/或所述第一折钩(4122)与所述配合槽(15)限位配合；所述配合槽(15)包括第一卡槽(151)和第二卡槽(152)，所述第一卡槽(151)为弧形槽，所述第一卡槽(151)沿所述螺母主体(11)的周向延伸设置，所述第二卡槽(152)沿所述螺母主体(11)的轴向延伸，所述弧形件(4121)和所述第一卡槽(151)卡接，所述第一折钩(4122)和所述第二卡槽(152)卡接。
  11. 根据权利要求6所述的螺母组件，其特征在于，所述螺母组件还包括第二限位块(43)，所述第二限位块(43)凸出设置在所述螺母主体(11)的外周面上，所述第二限位块(43)位于所述螺旋导槽(13)朝向所述连接板(20)的一侧，所述第二限位块(43)和所述止挡圈(70)止挡配合，所述第二限位块(43)和所述螺母主体(11)为一体结构。
  12. 根据权利要求7所述的螺母组件，其特征在于，
    所述第三限位结构具有凸出所述螺母主体(11)外周面的第一止挡面(4124)，所述止挡圈(70)和所述第一止挡面(4124)止挡配合；
    第四限位结构，所述第四限位结构设置在所述螺母主体(11)上，所述第四限位结构具有凸出所述螺母主体(11)外周面的第二止挡面(431)，所述止挡圈(70)和所述第二止挡面(431)止挡配合；其中，所述螺旋导槽(13)位于所述第三限位结构和所述第四限位结构之间。
  13. 根据权利要求12所述的螺母组件，其特征在于，所述止挡圈(70)包括螺旋件(71)和分别设置在所述螺旋件(71)两端的第三折钩(72)、第四折钩(73)，所述螺旋件(71)位于所述螺旋导槽(13)内，所述第三折钩(72)和所述第三限位结构止挡配合，所述第四折钩(73)和所述第四限位结构止挡配合。
  14. 根据权利要求13所述的螺母组件，其特征在于，所述第三折钩(72)朝远离所述螺母主体(11)外周面的方向延伸，所述第四折钩(73)位于所述螺旋件(71)朝向所述第四限位结构的一侧，所述第四折钩(73)沿所述螺母主体(11)的轴线方向延伸；所述第四限位结构为第二限位块(43)，所述第二止挡面(431)位于所述第二限位块(43)的外侧壁上，所述止挡圈(70)和所述第二限位块(43)的外侧壁止挡配合。
  15. 根据权利要求1所述的螺母组件，其特征在于，所述连接板(20)和所述螺母(10)之间具有平衡通道(030)，所述平衡通道(030)将所述连接板(20)两侧的区域连通。
  16. 根据权利要求2所述的螺母组件，其特征在于，
    所述第一限位结构位于所述螺母主体(11)，所述第一限位结构具有第一凹槽(031)， 所述限位板(12)具有第二凹槽(032)，所述第一凹槽(031)和所述第二凹槽(032)形成平衡通道(030)；或，
    所述第一限位结构具有第一凹槽(031)，所述第二限位结构具有第三凹槽，所述第一凹槽(031)和所述第三凹槽形成平衡通道(030)。
  17. 根据权利要求15所述的螺母组件，其特征在于，所述螺母主体(11)的外壁具有切除面(013)，所述平衡通道(030)位于所述切除面(013)和所述连接板(20)的内壁之间。
  18. 根据权利要求17所述的螺母组件，其特征在于，所述螺母主体(11)包括依次连接的螺母段(111)、过渡段(112)、连接段(113)，所述限位板(12)的最大径向尺寸大于所述连接段(113)的最大径向尺寸，所述切除面(013)包括依次连接的第三平面(0133)和第四平面(0134)，所述第三平面(0133)位于所述连接段(113)，所述第四平面(0134)位于所述限位板(12)；其中，所述第三平面(0133)和所述第四平面(0134)共面设置，所述平衡通道(030)位于所述第三平面(0133)和所述连接板(20)的内壁之间。
  19. 根据权利要求1所述的螺母组件，其特征在于，所述连接板(20)和所述螺母(10)在周向上过盈配合，所述连接板(20)和所述螺母(10)在径向上间隙配合。
  20. 根据权利要求19所述的螺母组件，其特征在于，所述螺母主体(11)上设置有第一限位结构，所述连接板(20)包括连接环(021)和设置在所述连接环(021)上的第二限位结构，其中，所述连接环(021)套设在所述螺母主体(11)上，所述连接环(021)和所述螺母主体(11)间隙配合，所述第一限位结构和所述第二限位结构在所述连接环(021)的径向间隙配合，所述第一限位结构和所述第二限位结构在所述连接环(021)的周向过盈配合。
  21. 根据权利要求20所述的螺母组件，其特征在于，所述第一限位结构包括设置在所述螺母主体(11)外壁的限位凸台(31)，所述第二限位结构包括设置在所述连接板(20)内壁的限位槽(32)，所述限位凸台(31)位于所述限位槽(32)内。
  22. 根据权利要求21所述的螺母组件，其特征在于，所述限位凸台(31)具有两个第一限位面(311)和位于两个所述第一限位面(311)之间的第一配合面(312)，所述限位槽(32)具有两个第二限位面(321)和位于两个所述第二限位面(321)之间的第二配合面(322)；其中，所述第一配合面(312)和所述第二配合面(322)间隙配合，两个所述第一限位面(311)和两个所述第二限位面(321)一一对应地限位配合。
  23. 根据权利要求22所述的螺母组件，其特征在于，
    两个所述第一限位面(311)、两个所述第二限位面(321)均平行设置，两个所述第一限位面(311)之间的距离为L1，两个所述第二限位面(321)之间的距离为L2，L1-L2≥0.03mm；
    所述第一配合面(312)和所述第二配合面(322)为同轴设置的弧形面，所述第一 配合面(312)的直径d3，所述第二配合面(322)的直径为d4，d4-d3≥0.1mm；
    所述螺母主体(11)的最大直径为d1，所述连接环(021)的内径为d2，d2-d1≥0.1mm；
    在所述螺母(10)的轴向上，所述限位凸台(31)的尺寸大于所述连接板(20)的厚度。
  24. 根据权利要求1所述的螺母组件，其特征在于，所述螺母(10)和所述连接板(20)之间设置有防呆结构，所述防呆结构用于限定所述连接板(20)在所述螺母(10)上的安装位置。
  25. 根据权利要求24所述的螺母组件，其特征在于，所述防呆结构包括设置在所述螺母主体(11)上的第一限位部(831)、第二限位部(832)以及设置在所述连接板(20)上的第三限位部(833)、第四限位部(834)，所述第一限位部(831)和所述第三限位部(833)限位配合，所述第二限位部(832)和所述第四限位部(834)限位配合；其中，所述连接板(20)具有毛刺面(201)，所述防呆结构限定所述毛刺面(201)背离所述限位板(12)。
  26. 根据权利要求25所述的螺母组件，其特征在于，所述第一限位部(831)包括第一限位凸块，所述第二限位部(832)包括第二限位凸块，所述第三限位部(833)包括第一限位槽，所述第四限位部(834)包括第二限位槽，所述第一限位凸块卡入所述第一限位槽，所述第二限位凸块卡入所述第二限位槽，其中，所述第一限位凸块和所述第二限位凸块尺寸不相等；在所述螺母(10)的周向上，所述第一限位凸块的尺寸大于所述第二限位凸块的尺寸，所述第一限位槽和所述第二限位槽在所述连接板(20)的周向上具有夹角A，0°＜A＜180°。
  27. 根据权利要求25所述的螺母组件，其特征在于，所述防呆结构还包括设置在所述螺母(10)上的第五限位部(35)和设置在所述连接板(20)上的第六限位部(36)，其中，所述第二限位部(832)位于所述第一限位部(831)和所述第五限位部(35)之间，所述第四限位部(834)位于所述第三限位部(833)和所述第六限位部(36)之间，所述第五限位部(35)和所述第六限位部(36)配合。
  28. 根据权利要求27所述的螺母组件，其特征在于，
    所述第五限位部(35)包括第三限位凸块，所述第六限位部(36)包括第三限位槽，所述第三限位凸块卡入所述第三限位槽，其中，所述第一限位部(831)和所述第五限位部(35)的尺寸均大于所述第二限位部(832)的尺寸；
    在所述螺母(10)的周向上，所述第一限位部(831)的径向尺寸小于所述第五限位部(35)的尺寸；所述第二限位部(832)和所述第一限位部(831)在所述连接板(20)的周向上具有夹角B，所述第二限位部(832)和所述第五限位部(35)在所述连接板(20)的周向上具有夹角C，其中，B＝C＝90°；
    所述第二限位部(832)和所述第一限位部(831)在所述连接板(20)的周向上具 有夹角B，所述第二限位部(832)和所述第五限位部(35)在所述连接板(20)的周向上具有夹角C，其中，0°＜B＜90°，B+C＝180°。
  29. 一种电子膨胀阀，其特征在于，所述电子膨胀阀包括阀体组件(40)和权利要求1所述的螺母组件，所述螺母组件位于所述阀体组件(40)内，所述阀体组件(40)包括相互连接的阀盖(41)和阀座(42)，所述螺母主体(11)的至少一部分位于所述阀盖(41)的腔体内，所述限位板(12)位于所述阀座(42)的腔体内，所述连接板(20)的外侧壁和所述阀座(42)的内侧壁焊接。
  30. 根据权利要求29所述的电子膨胀阀，其特征在于，所述阀座(42)具有开口，所述连接板(20)设置在所述开口处，所述连接板(20)背离所述阀座(42)腔体的一侧和所述开口所在平面之间的距离为L，L≥0.02mm，所述连接板(20)的厚度为t，L＜0.4t。
  31. 根据权利要求29所述的电子膨胀阀，其特征在于，所述连接板(20)具有平衡孔或平衡槽(21)，所述阀座(42)的腔体和所述阀盖(41)的腔体通过所述平衡孔或所述平衡槽(21)连通。
  32. 根据权利要求29所述的电子膨胀阀，其特征在于，所述电子膨胀阀还包括导向套(50)和阀针组件(60)，所述螺母(10)具有定位孔，所述定位孔内具有止挡面，所述导向套(50)的一端穿入所述定位孔，所述导向套(50)的端面和所述止挡面抵接，所述阀针组件(60)和所述螺母主体(11)螺纹连接，且所述阀针组件(60)穿过所述导向套(50)。
  33. 根据权利要求32所述的电子膨胀阀，其特征在于，所述阀座(42)的内壁具有定位凸台(421)，所述定位凸台(421)内具有阀口(422)，所述定位凸台(421)穿入所述导向套(50)远离所述螺母(10)的一端，所述定位凸台(421)、所述导向套(50)、所述定位孔和所述阀针组件(60)同轴设置。
  34. 根据权利要求32所述的电子膨胀阀，其特征在于，所述螺母(10)的外周面上具有螺旋导槽(13)；所述螺母组件还包括止挡圈(70)，所述止挡圈(70)套设在所述螺旋导槽(13)内，所述电子膨胀阀还包括转子组件(90)，所述转子组件(90)包括转子连接板(91)、导动片(92)和筒状的磁转子(93)，所述转子连接板(91)位于所述磁转子(93)的腔体内并和所述磁转子(93)固定连接，所述导动片(92)位于所述磁转子(93)的腔体内并和所述转子连接板(91)固定连接，所述导动片(92)和所述止挡圈(70)限位配合。
  35. 根据权利要求34所述的电子膨胀阀，其特征在于，所述转子连接板(91)具有压装槽(94)，所述导动片(92)包括相互连接的压装段(921)和限位段(922)，所述压装段(921)和所述限位段(922)相互垂直，所述压装段(921)位于所述压装槽(94)内，所述限位段(922)沿所述螺母(10)的轴向延伸并和所述止挡圈(70)限位配合；所述电子膨胀阀还包括阀针组件(60)，所述阀针组件(60)和所述螺母主体(11)螺纹连接，所述阀针组件(60)和所述转子组件(90)固定连接。
  36. 根据权利要求29所述的电子膨胀阀，其特征在于，所述连接板(20)和所述螺母(10)在径向上间隙配合；所述连接板(20)和所述阀座(42)在所述螺母(10)的轴向间隙配合；所述电子膨胀阀还包括导向套(50)，所述导向套(50)固定设置在所述阀座(42)的腔体内，所述导向套(50)和所述螺母(10)插接，所述导向套(50)和所述螺母(10)在轴向上抵接且在径向上过盈配合。
  37. 根据权利要求36所述的电子膨胀阀，其特征在于，
    所述螺母(10)具有定位孔(1101)，所述定位孔(1101)内具有止挡面(1102)，所述导向套(50)的一端穿入所述定位孔(1101)，所述导向套(50)的端面和所述止挡面(1102)抵接，所述导向套(50)的外壁和所述定位孔(1101)的内壁过盈配合；
    或所述导向套(50)具有定位孔(1101)，所述定位孔(1101)内具有止挡面(1102)，所述螺母(10)的一端穿入所述定位孔(1101)，所述螺母(10)的端面和所述止挡面(1102)抵接，所述螺母(10)的外壁和所述定位孔(1101)的内壁过盈配合。
  38. 根据权利要求36所述的电子膨胀阀，其特征在于，所述电子膨胀阀还包括设置在所述阀座(42)内的定位凸台(421)，所述定位凸台(421)和所述导向套(50)远离所述螺母(10)的一端插接，所述定位凸台(421)和所述导向套(50)在轴向上抵接且在径向上过盈配合。
  39. 根据权利要求38所述的电子膨胀阀，其特征在于，所述定位凸台(421)和所述阀座(42)为一体结构；或，所述电子膨胀阀包括阀口件(040)，所述阀口件(040)包括所述定位凸台(421)以及和所述定位凸台(421)连接的本体(042)，所述阀口件(040)还具有贯穿所述本体(042)和所述定位凸台(421)的阀口，所述本体(042)和所述阀座(42)固定连接，所述定位凸台(421)穿入所述导向套(50)远离所述螺母(10)的一端，所述定位凸台(421)和所述导向套(50)过盈配合，所述导向套(50)和所述本体(042)抵接。
  40. 根据权利要求39所述的电子膨胀阀，其特征在于，所述本体(042)包括依次连接的第一轴段(0421)、第二轴段(0422)和第三轴段(0423)，所述第一轴段(0421)、所述第二轴段(0422)和所述第三轴段(0423)的外径依次减小，所述第一轴段(0421)和所述定位凸台(421)连接；所述阀座(42)具有相互连通的第一配合孔和第二配合孔，所述第一配合孔的直径大于所述第二配合孔的直径；其中，所述第一轴段(0421)穿入所述第一配合孔内，所述第二轴段(0422)穿过所述第二配合孔，所述第三轴段(0423)位于所述阀座(42)外。
  41. 根据权利要求36所述的电子膨胀阀，其特征在于，所述阀座(42)的内侧壁具有平行于所述螺母(10)轴线的第一阶梯面(4221)和垂直于所述螺母(10)轴线的第二阶梯面(4222)，所述第一阶梯面(4221)和所述第二阶梯面(4222)形成台阶结构，所述连接板(20)的外侧壁和所述第一阶梯面(4221)连接，所述连接板(20)和所述第二阶梯 面(4222)间隙配合；所述连接板(20)的一部分位于所述台阶结构内，所述连接板(20)的另一部分位于所述台阶结构外，所述连接板(20)和所述阀座(42)焊接。
  42. 根据权利要求41所述的电子膨胀阀，其特征在于，
    所述阀体组件(40)还包括阀盖(41)，所述电子膨胀阀还包括转子组件(90)，所述阀盖(41)和所述阀座(42)连接，所述转子组件(90)设置在所述阀盖(41)内，所述转子组件(90)包括磁转子(93)和设置在所述磁转子(93)内的转动连接件，所述转动连接件包括相互连接的转子连接板(91)和导动片(92)，所述转子连接板(91)和所述磁转子(93)固定连接，所述导动片(92)沿所述螺母(10)的轴向延伸；所述螺母组件还包括可转动地设置在所述螺母(10)上的止挡圈(70)，所述导动片(92)的侧壁和所述止挡圈(70)限位配合；
    所述转动连接件为一体结构，或所述转子连接板(91)、所述导动片(92)为两个单独的结构；所述导动片(92)和所述磁转子(93)的内壁间隙配合，或所述导动片(92)和所述磁转子(93)的内壁贴合。
  43. 根据权利要求41所述的电子膨胀阀，其特征在于，所述连接板(20)和所述第二阶梯面(4222)之间具有间隙t1，t1≥0.2mm；所述连接板(20)的厚度为t2，t1≤0.3t2。
PCT/CN2023/076003 2022-03-04 2023-02-14 螺母组件及电子膨胀阀 WO2023165331A1 (zh)

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