Nut assembly and electronic expansion valve

Abstract

The application provides a nut assembly and an electronic expansion valve, and the nut assembly comprises a nut and a connecting plate, the connecting plate is detachably sleeved on the nut, the connecting plate and the nut are in a circumferential interference fit, and the connecting plate and the nut are in a radial clearance fit. According to the scheme, the connecting plate on the nut can move along the radial direction of the nut but cannot rotate along the circumferential direction of the nut, the nut is prevented from being simultaneously in a radial interference fit with the connecting plate and a valve body assembly in the process of being assembled into the valve body assembly, the over-positioning of the nut is avoided, the coaxiality of the nut and the valve body assembly is improved, the machining precision of the nut assembly is reduced, the machining cost is reduced, and the production efficiency of the nut assembly is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electronic expansion valves, in particular to a nut assembly and an electronic expansion valve. BACKGROUND

[0002] In the related art, the nut assembly of the electronic expansion valve, the connecting plate and the nut in the nut assembly are in interference fit in the radial direction of the nut. During the process of assembling the nut assembly into the valve body assembly, the connecting plate and the valve body assembly are also in close fit, which is easy to cause the nut to be over-positioned in the radial direction, and cannot guarantee the coaxiality between the nut assembly and the valve body assembly, resulting in high processing requirements of the nut assembly and the valve body assembly, and high assembly and processing difficulty. SUMMARY

[0003] The present application provides a nut assembly and an electronic expansion valve to facilitate the assembly of the nut assembly.

[0004] In order to achieve the above-mentioned purpose, according to one aspect of the present application, a nut assembly is provided, comprising: a nut; a connecting plate, which is detachably sleeved on the nut, the connecting plate and the nut being in interference fit in the circumferential direction and in clearance fit in the radial direction.

[0005] Further, the nut comprises a nut body and a first limiting structure arranged on the nut body, and the connecting plate comprises a connecting ring and a second limiting structure arranged on the connecting ring, wherein the connecting ring is sleeved on the nut body, the connecting ring and the nut body are in clearance fit, the first limiting structure and the second limiting structure are in clearance fit in the radial direction of the connecting ring, and the first limiting structure and the second limiting structure are in interference fit in the circumferential direction of the connecting ring.

[0006] Further, the first limiting structure comprises a limiting boss arranged on the outer wall of the nut body, and the second limiting structure comprises a limiting groove arranged on the inner wall of the connecting plate, and the limiting boss is located in the limiting groove.

[0007] Further, the limiting boss has two first limiting surfaces and a first matching surface located between the two first limiting surfaces, and the limiting groove has two second limiting surfaces and a second matching surface located between the two second limiting surfaces; wherein the first matching surface and the second matching surface are in clearance fit, and the two first limiting surfaces and the two second limiting surfaces are in one-to-one limiting fit.

[0008] Further, the two first limiting surfaces and the two second limiting surfaces are arranged in parallel, the distance between the two first limiting surfaces is L1, the distance between the two second limiting surfaces is L2, and L1-L2≥0.03mm.

[0009] Further, the first matching surface and the second matching surface are arc-shaped surfaces arranged coaxially, the diameter of the first matching surface is d3, the diameter of the second matching surface is d4, and d4-d3≥0.1mm.

[0010] Further, the maximum diameter of the nut body is d1, the inner diameter of the connecting ring is d2, and d2-d1 is greater than or equal to 0.1 mm.

[0011] Further, in the axial direction of the nut, the size of the limiting boss is greater than the thickness of the connecting plate.

[0012] Further, the limiting boss further has two guide inclined surfaces, and the two guide inclined surfaces are connected to the ends away from the connecting plate, respectively.

[0013] Further, the nut body comprises a nut segment, a transition segment, and a connecting segment connected in sequence, the nut further comprises a limiting plate connected to the connecting segment, the outer diameter of the connecting segment is greater than the outer diameter of the nut segment, the outer diameter of the limiting plate is greater than the outer diameter of the connecting segment, the connecting plate is detachably sleeved on the connecting segment, the connecting plate and the limiting plate are in abutment, and the first limiting structure is located on the outer wall of the connecting segment.

[0014] According to another aspect of the present application, an electronic expansion valve is provided, which comprises a valve body assembly and the above-mentioned nut assembly, and the nut assembly is located in the valve body assembly.

[0015] Further, the electronic expansion valve further comprises a guide sleeve, the guide sleeve is arranged in the cavity of the valve body assembly, the nut has a positioning hole, one end of the guide sleeve penetrates into the positioning hole, and the outer wall of the guide sleeve and the inner wall of the positioning hole are in interference fit.

[0016] Further, the valve body assembly comprises a valve cover and a valve seat connected to each other, at least a part of the nut is located in the cavity of the valve cover, the valve seat comprises a seat body and a valve port piece connected to each other, the seat body is connected to the valve cover, the valve port piece has a positioning boss, the positioning boss penetrates into the end of the guide sleeve away from the nut, and the positioning boss and the guide sleeve are in interference fit.

[0017] The technical scheme of the present application provides a nut assembly, which comprises: a nut; and a connecting plate, which is detachably sleeved on the nut, and is in interference fit with the nut in the circumferential direction and in clearance fit with the nut in the radial direction. With this scheme, the connecting plate on the nut can move in the radial direction of the nut but cannot rotate in the circumferential direction of the nut, thereby avoiding the situation that, in the related art, the nut assembly cannot guarantee the coaxiality between the nut assembly and the valve body assembly due to the close fit between the connecting plate and the valve body assembly during the process of assembling the nut assembly into the valve body assembly, improving the coaxiality between the nut assembly and the valve body assembly, reducing the machining precision and machining cost of the nut assembly, reducing the assembly difficulty of the nut assembly, and improving the production efficiency of the nut assembly. BRIEF DESCRIPTION OF DRAWINGS

[0018] The drawings constituting a part of the specification illustrate the present application and, along with the description, serve to explain the principles of the application. In the drawings:

[0019] Figure 1 A structural schematic view of a nut assembly provided by an embodiment of the present application is shown;

[0020] Figure 2 A structural schematic view of a nut provided in the nut assembly of Figure 1 is shown;

[0021] Figure 3 A top view of the nut of Figure 2 is shown;

[0022] Figure 4 A structural schematic view of a connecting plate provided in the nut assembly of Figure 1 is shown;

[0023] Figure 5 A structural schematic view of an electronic expansion valve provided by another embodiment of the present application is shown.

[0024] In the above drawings, the following reference signs are used:

[0025] 10, nut; 11, nut body; 111, nut section; 112, transition section; 113, connecting section; 114, limiting plate; 12, first limiting structure; 121, first limiting surface; 122, first mating surface; 123, guide inclined surface;

[0026] 20, connecting plate; 21, connecting ring; 22, second limiting structure; 221, second limiting surface; 222, second mating surface;

[0027] 30, valve body assembly; 31, valve cover; 32, valve seat; 321, seat body; 322, valve port member; 323, positioning boss;

[0028] 40, guide sleeve. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. The following description of at least one exemplary embodiment is actually only illustrative, but not as any limitation on the present application and its application or use. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without any creative work, fall within the scope of protection of the present application.

[0030] As Figures 1 to 4As shown, the embodiment of the present application provides a nut assembly, comprising: a nut 10; a connecting plate 20, the connecting plate 20 is detachably sleeved on the nut 10, the connecting plate 20 and the nut 10 are in a circumferential interference fit, and the connecting plate 20 and the nut 10 are in a radial clearance fit.

[0031] In the embodiment, the connecting plate 20 on the nut 10 can move in the radial direction of the nut 10 but cannot rotate in the circumferential direction of the nut 10, which avoids the situation that the nut assembly in the prior art cannot guarantee the coaxiality between the nut assembly and the valve body assembly during the process of being loaded into the valve body assembly 30, because the connecting plate 20 and the valve body assembly are also in a close fit, which causes the nut 10 to be over-positioned in the radial direction, improves the coaxiality of the nut assembly and the valve body assembly, reduces the machining precision and machining cost of the nut assembly, reduces the assembly difficulty of the nut assembly, and improves the production efficiency of the nut assembly.

[0032] Specifically, the nut 10 comprises a nut body 11 and a first limiting structure 12 arranged on the nut body 11, and the connecting plate 20 comprises a connecting ring 21 and a second limiting structure 22 arranged on the connecting ring 21, wherein the connecting ring 21 is sleeved on the nut body 11, the connecting ring 21 and the nut body 11 are in a clearance fit, the first limiting structure 12 and the second limiting structure 22 are in a radial clearance fit on the connecting ring 21, and the first limiting structure 12 and the second limiting structure 22 are in a circumferential interference fit. In this way, the limiting fit between the connecting plate 20 and the nut 10 is realized through the limiting fit between the first limiting structure 12 and the second limiting structure 22, the first limiting structure 12 is directly arranged on the nut 10, and the second limiting structure 22 is directly arranged on the connecting plate 20, which facilitates machining while reducing the overall size of the first limiting structure 12 and the second limiting structure 22, and ensures the miniaturization of the nut assembly.

[0033] Specifically, the first limiting structure 12 comprises a limiting boss arranged on the outer wall of the nut body 11, the second limiting structure 22 comprises a limiting groove arranged on the inner wall of the connecting plate 20, and the limiting boss is located in the limiting groove. In the embodiment, the limiting fit between the first limiting structure 12 and the second limiting structure 22 is mainly designed as the limiting fit between the limiting boss and the limiting groove, which is simple in structure, easy to machine, and reliable in fit.

[0034] As shown in Figure 3 and Figure 4 The limiting boss has two first limiting surfaces 121 and a first fit surface 122 located between the two first limiting surfaces 121, and the limiting groove has two second limiting surfaces 221 and a second fit surface 222 located between the two second limiting surfaces 221; wherein the first fit surface 122 and the second fit surface 222 are in a clearance fit, and the two first limiting surfaces 121 and the two second limiting surfaces 221 are in one-to-one limiting fit.

[0035] In the embodiment, the slight movement of the connecting plate 20 along the radial direction of the nut body 11 is enabled by the clearance fit between the first fitting surface 122 and the second fitting surface 222, and the rotation of the connecting plate 20 along the circumferential direction of the nut body 11 is limited by the one-to-one corresponding fit between the two first limiting surfaces 121 and the two second limiting surfaces 221, thereby avoiding the over-positioning of the connecting plate 20 and facilitating the processing and forming of the limiting boss and the limiting groove, and the structure is simple and the fit is reliable. Specifically, the two first limiting surfaces 121 and the two second limiting surfaces 221 are in one-to-one corresponding interference fit.

[0036] Specifically, the two first limiting surfaces 121 and the two second limiting surfaces 221 are both arranged in parallel, the distance between the two first limiting surfaces 121 is L1, and the distance between the two second limiting surfaces 221 is L2, and L1-L2≥0.03mm. In this way, the width of the limiting groove arranged on the outer circumferential surface of the nut body 11 is smaller than the width of the limiting boss on the nut body 11, thereby ensuring the reliability of the interference fit between the first limiting surface 121 and the second limiting surface 221. Specifically, when L1-L2<0.03mm, the interference amount between the limiting boss and the limiting groove is insufficient to limit the rotation of the connecting plate 20 along the circumferential direction of the nut body 11, thereby ensuring the reliability of the interference fit between the limiting boss and the limiting groove.

[0037] Further, the first fitting surface 122 and the second fitting surface 222 are coaxially arranged arc-shaped surfaces, the diameter of the first fitting surface 122 is d3, the diameter of the second fitting surface 222 is d4, and d4-d3≥0.1mm. In this way, the depth of the limiting groove arranged on the outer circumferential surface of the nut body 11 is greater than the length of the limiting boss on the nut body 11, thereby ensuring the reliability of the clearance fit between the first fitting surface 122 and the second fitting surface 222. Specifically, when d4-d3<0.1mm, the gap amount between the limiting boss and the limiting groove is insufficient to enable the connecting plate 20 to move along the radial direction of the nut body 11, thereby ensuring the reliability of the clearance fit between the limiting boss and the limiting groove.

[0038] Further, the maximum diameter of the nut body 11 is d1, and the inner diameter of the connecting ring 21 is d2, and d2-d1≥0.1mm. In this way, the maximum radial dimension of the nut body 11 is greater than the inner diameter of the connecting ring 21, thereby ensuring the reliability of the radial movement of the connecting ring 21 along the nut body 11. Specifically, when d2-d1<0.1mm, the inner side wall of the connecting ring 21 and the outer side wall of the nut body 11 are tightly fitted, which causes the connecting plate 20 to be unable to move along the radial direction of the nut body 11, thereby ensuring the reliability of the clearance fit between the connecting plate 20 and the nut 10.

[0039] As Figure 1As shown in the axial direction of the nut 10, the size of the limiting boss is greater than the thickness of the connecting plate 20. In this way, the limiting effect of the limiting boss on the connecting plate 20 can be ensured.

[0040] Specifically, the limiting boss further has two guide inclined surfaces 123, which are respectively connected to one end of the two first limiting surfaces 121 away from the connecting plate 20.

[0041] In this embodiment, by arranging the two guide inclined surfaces 123, the connecting plate 20 can be guided and installed conveniently, preventing the connecting plate 20 from being damaged due to collision with the limiting boss during installation, and preventing the installation position of the connecting plate 20 from being inaccurate, thereby ensuring the reliability of the installation of the connecting plate 20.

[0042] As shown in the axial direction of the nut 10, the size of the limiting boss is greater than the thickness of the connecting plate 20. In this way, the limiting effect of the limiting boss on the connecting plate 20 can be ensured. Figure 1 and Figure 2 As shown, the nut body 11 includes a nut segment 111, a transition segment 112, and a connecting segment 113 connected in sequence, the nut 10 further includes a limiting plate 114 connected to the connecting segment 113, the outer diameter of the connecting segment 113 is greater than that of the nut segment 111, the outer diameter of the limiting plate 114 is greater than that of the connecting segment 113, the connecting plate 20 is detachably sleeved on the connecting segment 113, the connecting plate 20 and the limiting plate 114 abut, and the first limiting structure 12 is located on the outer wall of the connecting segment 113.

[0043] In this embodiment, the connecting plate 20 and the nut body 11 are detachably connected. By arranging the connecting plate 20 and the nut body 11 separately, the need to put the connecting plate into the nut assembly for insert injection molding in the related art is avoided, the production efficiency of the nut assembly is improved, and the nut body 11 can be better used for secondary regrind, thereby avoiding the situation that the nut body 11 with the connecting plate 20 cannot be used for secondary regrind. Moreover, in this way, the connecting position of the connecting plate and the nut during insert injection molding of the nut assembly in the related art has more flash due to process reasons, which causes damage to the nut assembly, and the structural strength of the nut assembly is improved. Specifically, the first limiting structure 12 is connected to the connecting segment 113 and the limiting plate 114.

[0044] As shown in the axial direction of the nut 10, the size of the limiting boss is greater than the thickness of the connecting plate 20. In this way, the limiting effect of the limiting boss on the connecting plate 20 can be ensured. Figure 5 Another embodiment of the present application provides an electronic expansion valve, which includes a valve body assembly 30 and the above-mentioned nut assembly, and the nut assembly is located in the valve body assembly 30.

[0045] Specifically, the electronic expansion valve further includes a guide sleeve 40, which is arranged in the cavity of the valve body assembly 30, the nut 10 has a positioning hole, one end of the guide sleeve 40 penetrates into the positioning hole, and the outer wall of the guide sleeve 40 and the inner wall of the positioning hole are in interference fit.

[0046] In the embodiment, the outer wall of the guide sleeve 40 and the inner wall of the positioning hole are in interference fit, thereby ensuring the coaxiality between the nut assembly and the guide sleeve 40. Meanwhile, in combination with the above arrangement, the over-positioning of the nut 10 in the process of assembling the nut assembly into the valve body assembly is avoided, the coaxiality between the nut assembly and the guide sleeve 40 is improved, the machining precision of the connecting plate 20, the nut 10 and the guide sleeve 40 in the nut assembly is reduced, the machining cost is lowered, and the production efficiency of the nut assembly is improved.

[0047] Further, the valve body assembly 30 comprises a valve cover 31 and a valve seat 32 connected with each other, at least a part of the nut 10 is located in the cavity of the valve cover 31, the valve seat 32 comprises a seat body 321 and a valve port 322 connected with each other, the seat body 321 is connected with the valve cover 31, the valve port 322 has a positioning boss 323, the positioning boss 323 penetrates into the end of the guide sleeve 40 away from the nut 10, and the positioning boss 323 and the guide sleeve 40 are in interference fit.

[0048] In the embodiment, the interference fit between the positioning boss 323 and the guide sleeve 40 ensures the coaxiality between the guide sleeve 40 and the valve body assembly, and in combination with the interference fit between the guide sleeve 40 and the positioning hole, the coaxiality between the valve body assembly and the nut assembly is ensured, thereby ensuring the reliability of the electronic expansion valve.

[0049] The above merely describes the preferred embodiments of the present application and is not used to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A nut assembly, characterized by The utility model relates to a nut (10) and connecting plate (20) are detachably sleeved on the nut (10), and the connecting plate (20) and the nut (10) are in the radial clearance fit, and the connecting plate (20) and the nut (10) are in the circumferential interference fit. The utility model relates to a nut (10) and connecting plate (20) are detachably sleeved on the nut (10), and the connecting plate (20) and the nut (10) are in the radial clearance fit, and the connecting plate (20) and the nut (10) are in the circumferential interference fit. The utility model relates to a nut (10) and connecting plate (20) are detachably sleeved on the nut (10), and the connecting plate (20) and the nut (10) are in the radial clearance fit, and the connecting plate (20) and the nut (10) are in the circumferential interference fit. The utility model relates to a nut (10) and connecting plate (20) are detachably sleeved on the nut (10), and the connecting plate (20) and the nut (10) are in the radial clearance fit, and the connecting plate (20) and the nut (10) are in the circumferential interference fit. The utility model relates to a nut (10) and connecting plate (20) are detachably sleeved on the nut (10), and the connecting plate (20) and the nut (10) are in the radial clearance fit, and the connecting plate (20) and the nut (10) are in the circumferential interference fit. The utility model relates to a nut (10) and connecting plate (20) are detachably sleeved on the nut (10), and the connecting plate (20) and the nut (10) are in the radial clearance fit, and the connecting plate (20) and the nut (10) are in the circumferential interference fit.

2. The nut assembly of claim 1, wherein, The utility model relates to a nut (10) and connecting plate (20) are detachably sleeved on the nut (10), and the connecting plate (20) and the nut (10) are in the radial clearance fit, and the connecting plate (20) and the nut (10) are in the circumferential interference fit.

3. The nut assembly of claim 2, wherein, The utility model relates to a nut (10) and connecting plate (20) are detachably sleeved on the nut (10), and the connecting plate (20) and the nut (10) are in the radial clearance fit, and the connecting plate (20) and the nut (10) are in the circumferential interference fit.

4. The nut assembly of claim 2, wherein, The utility model relates to a nut (10) and connecting plate (20) are detachably sleeved on the nut (10), and the connecting plate (20) and the nut (10) are in the radial clearance fit, and the connecting plate (20) and the nut (10) are in the circumferential interference fit.

5. The nut assembly of claim 2, wherein, The utility model relates to a nut (10) and connecting plate (20) are detachably sleeved on the nut (10), and the connecting plate (20) and the nut (10) are in the radial clearance fit, and the connecting plate (20) and the nut (10) are in the circumferential interference fit.

6. The nut assembly of claim 2, wherein, The utility model relates to a nut (10) and connecting plate (20) are detachably sleeved on the nut (10), and the connecting plate (20) and the nut (10) are in the radial clearance fit, and the connecting plate (20) and the nut (10) are in the circumferential interference fit. The utility model relates to a nut (10) and connecting plate (20) are detachably sleeved on the nut (10), and the connecting plate (20) and the nut (10) are in the radial clearance fit, and the connecting plate (20) and the nut (10) are in the circumferential interference fit. The utility model relates to a nut (10) and connecting plate (20) are detachably sleeved on the nut (10), and the connecting plate (20) and the nut (10) are in the radial clearance fit, and the connecting plate (20) and the nut (10) are in the circumferential interference fit. The utility model relates to a nut (10) and connecting plate (20) are detachably sleeved on the nut (10), and the connecting plate (20) and the nut (10) are in the radial clearance fit, and the connecting plate (20) and the nut (10) are in the circumferential interference fit. The utility model relates to a nut (10) and connecting plate (20) are detachably sleeved on the nut (10), and the connecting plate (20) and the nut (10) are in the radial clearance fit, and the connecting plate (20) and the nut (10) are in the circumferential interference fit. The utility model relates to a nut (10) and connecting plate (20) are detachably sleeved on the nut (10), and the connecting plate (20) and the nut (10) are in the radial clearance fit, and the connecting plate (20) and the nut (10) are in the circumferential interference fit. The utility model relates to a nut (10) and connecting plate (20) are detachably sleeved on the nut (10), and the connecting plate (20) and the nut (10) are in the radial clearance fit, and the connecting plate (20) and the nut (10) are in the circumferential interference fit. The utility model relates to a nut (10) and connecting plate (20) are detachably sleeved on the nut (10), and the connecting plate (20) and the nut (10) are in the radial clearance fit, and the connecting plate (20) and the nut (10) are in the circumferential interference fit. The utility model relates to a nut (10) and connecting plate (20) are detachably sleeved on the nut (10), and the connecting plate (20) and the nut (10) are in the radial clearance fit, and the connecting plate (20) and the nut (10) are in the circumferential interference fit. The utility model relates to a nut (10) and connecting plate (20) are detachably sleeved on the nut (10), and the connecting plate (20) and the nut (10) are in the radial clearance fit, and the connecting plate (20) and the nut (10) are in the circumferential interference fit. The utility model relates to a nut (10) and connecting plate (20) are detachably sleeved on the nut (10), and the connecting plate (20) and the nut (10) are in the radial clearance fit, and the connecting plate (20) and the nut (10) are in the circumferential interference fit. The utility model relates to a nut (10) and connecting plate (20) are detachably sleeved on the nut (10), and the connecting plate (20) and the nut (10) are in the radial clearance fit, and the connecting plate (20) and the nut (10) are in the circumferential interference fit. The utility model relates to a nut (10) and connecting plate (20) are detachably sleeved on the nut (10), and the connecting plate (20) and the nut (10) are in the radial clearance fit, and the connecting plate (20) and the nut (10) are in the circumferential interference fit. The utility model relates to a nut (10) and connecting plate (20) are detachably sleeved on the nut (10), and the connecting plate (20) and the nut (10) are in the radial clearance fit, and the connecting plate (20) and the nut (10) are in the circumferential interference fit. The utility model relates to a nut (10) and connecting plate (20) are detachably sleeved on the nut (10), and the connecting plate (20) and the nut (10) are in the radial clearance fit, and the connecting plate (20) and the nut (10) are in the circumferential interference fit. The utility model relates to a nut (10) and connecting plate (20) are detachably sleeved on the nut (10), and the connecting plate (20) and the nut (10) are in the radial clearance fit, and the connecting plate (20) and the nut (10) are in the circumferential interference fit. The utility model relates to a nut (10) and connecting plate (20) are detachably sleeved on the nut (10), and the connecting plate (20) and the nut (10) are in the radial clearance fit, and the connecting plate (20) and the nut (10) are in the circumferential interference fit. The utility model relates to a nut (10) and connecting plate (20) are detachably sleeved on the nut (10), and the connecting plate (20) and the nut (10) are in the radial clearance fit, and the connecting plate (20) and the nut (10) are in the circumferential interference fit. The utility model relates to a nut (10) and connecting plate (20) are detachably sleeved on the nut (10), and the connecting plate (20) and the nut (10) are in the radial clearance fit, and the connecting plate (20) and the nut (10) are in the circumferential interference fit. The utility model relates to a nut (10) and connecting plate (20) are detachably sleeved on the nut (10), and the connecting plate (20) and the nut (10) are in the radial clearance fit, 7. The nut assembly of claim 2, wherein the limiting boss further comprises two guide slopes (123) connected to two ends of the first limiting surfaces (121) away from the connecting plate (20).

8. The nut assembly of claim 1, wherein, The nut (10) further comprises a limiting plate (114) connected to the connecting section (113), wherein an outer diameter of the limiting plate (114) is larger than an outer diameter of the connecting section (113), and the connecting plate (20) and the limiting plate (114) abut.

9. An electronic expansion valve characterized by The electronic expansion valve comprises a valve body assembly (30) and the nut assembly of any one of claims 1 to 8, wherein the nut assembly is located in the valve body assembly (30).

10. The electronic expansion valve according to claim 9, wherein The electronic expansion valve further comprises a guide sleeve (40) arranged in a cavity of the valve body assembly (30), wherein the nut (10) has a positioning hole, one end of the guide sleeve (40) penetrates into the positioning hole, and an outer wall of the guide sleeve (40) and an inner wall of the positioning hole are in interference fit.

11. The electronic expansion valve according to claim 10, wherein The valve body assembly (30) comprises a valve cover (31) and a valve seat (32) connected to each other, at least a part of the nut (10) is located in a cavity of the valve cover (31), the valve seat (32) comprises a seat body (321) and a valve port member (322) connected to each other, the seat body (321) is connected to the valve cover (31), the valve port member (322) has a positioning boss (323) penetrating into one end of the guide sleeve (40) away from the nut (10), and the positioning boss (323) and the guide sleeve (40) are in interference fit.

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