CN116733923A - Nut assembly and electronic expansion valve - Google Patents

Abstract

The application provides a nut component and an electronic expansion valve, wherein the nut component comprises: the nut body is provided with an internal thread, and the outer circumferential surface of the nut body is provided with a spiral guide groove; a stop ring, which is arranged on the spiral guide groove and is rotatably arranged along the spiral guide groove; the first limiting structure is arranged on the nut main body and is provided with a first stop surface protruding out of the outer periphery of the nut main body, and the stop ring is in stop fit with the first stop surface; the second limiting structure is arranged on the nut main body and is provided with a second stop surface protruding out of the outer periphery of the nut main body, and the stop ring is in stop fit with the second stop surface; the spiral guide groove is located between the first limiting structure and the second limiting structure. By adopting the scheme, the situation that the stop positions between the stop ring and the first stop surface and the second stop surface are positioned in the spiral guide groove or on the extension line of the spiral guide groove is avoided, and the reliability of the movement of the stop ring is ensured.

Description

Nut assembly and electronic expansion valve

Technical Field

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

Background

Currently, with the nut assembly in the prior art, the nut body and the connection plate are of an insert structure, and a region between the limit spring and the outer circumferential surface of the nut body forms a spiral guide groove. But limited by the processing technology, sharp edges, burrs and the like are easy to exist at two ends of the stop ring, when the stop ring collides with the first limit structure or the second limit structure, the first limit structure and the second limit structure are easy to be damaged, fine powder is impacted, and the powder enters the spiral guide groove to cause the stop ring to be blocked.

Disclosure of Invention

The application provides a nut assembly and an electronic expansion valve, which are used for solving the problem that a stop ring is easy to block after being impacted in the prior art.

In order to solve the above-described problems, according to an aspect of the present application, there is provided a nut assembly including: the nut body is provided with an internal thread, and the outer circumferential surface of the nut body is provided with a spiral guide groove; a stop ring, which is arranged on the spiral guide groove and is rotatably arranged along the spiral guide groove; the first limiting structure is arranged on the nut main body and is provided with a first stop surface protruding out of the outer periphery of the nut main body, and the stop ring is in stop fit with the first stop surface; the second limiting structure is arranged on the nut main body and is provided with a second stop surface protruding out of the outer periphery of the nut main body, and the stop ring is in stop fit with the second stop surface; the spiral guide groove is located between the first limiting structure and the second limiting structure.

Further, the stop ring comprises a spiral piece, a first folding hook and a second folding hook which are respectively arranged at two ends of the spiral piece, the spiral piece is positioned in the spiral guide groove, the first folding hook is matched with the stop of the first limiting structure, and the second folding hook is matched with the stop of the second limiting structure.

Further, the first folding hook extends in a direction away from the outer peripheral surface of the nut body, the second folding hook is located on one side of the spiral piece, facing the second limiting structure, and the second folding hook extends along the axis direction of the nut body.

Further, the second limiting structure is a limiting block, the second stop surface is located on the outer side wall of the limiting block, and the second limiting structure is matched with the outer side wall of the limiting block in a stop mode.

Further, the first limiting structure is a limiting ring, the first stop surface is located on the limiting ring, and the first stop surface is matched with the limiting ring in a stop mode.

Further, the limit ring comprises an arc-shaped piece and a third folding hook arranged at one end of the arc-shaped piece, the third folding hook is located at one side of the arc-shaped piece, facing the check ring, and extends in the direction away from the outer peripheral surface of the nut main body, the first stop surface is located on the outer side wall of the third folding hook, and the outer side wall of the first folding hook is matched with the stop of the first stop surface.

Further, the limit ring further comprises a fourth folding hook arranged at the other end of the arc-shaped piece, the fourth folding hook is located at one side, deviating from the check ring, of the arc-shaped piece, the outer peripheral surface of the nut main body is provided with a matching groove, and the arc-shaped piece and/or the fourth folding hook are in limit matching with the matching groove.

Further, the nut assembly further comprises a connecting plate and a limiting plate connected with the nut body, the radial size of the limiting plate is larger than that of the nut body, the connecting plate is detachably sleeved on the nut body, and the connecting plate is in butt joint with the limiting plate.

According to another aspect of the present application, there is provided an electronic expansion valve comprising a valve body assembly, a rotor assembly and the nut assembly described above, the nut assembly being disposed within a cavity of the valve body assembly; the rotor assembly comprises a rotor connecting plate, a guide plate and a cylindrical magnetic rotor, wherein the magnetic rotor is movably arranged in a cavity of the valve body assembly, the rotor connecting plate is positioned in the cavity of the magnetic rotor and is fixedly connected with the magnetic rotor, the guide plate is positioned in the cavity of the magnetic rotor and is fixedly connected with the rotor connecting plate, and the guide plate is in limit fit with a stop ring of the nut assembly.

Further, the valve body assembly comprises a valve cover and a valve seat which are connected with each other, the check ring, the first limiting structure and the second limiting structure are all located in a cavity of the valve cover, one part of the nut main body is located in the cavity of the valve seat, the other part of the nut main body is located in the cavity of the valve cover, and the connecting plate of the nut assembly is welded with the valve seat.

By applying the technical scheme of the application, the nut assembly comprises: the nut body is provided with an internal thread, and the outer circumferential surface of the nut body is provided with a spiral guide groove; a stop ring, which is arranged on the spiral guide groove and is rotatably arranged along the spiral guide groove; the first limiting structure is arranged on the nut main body and is provided with a first stop surface protruding out of the outer periphery of the nut main body, and the stop ring is in stop fit with the first stop surface; the second limiting structure is arranged on the nut main body and is provided with a second stop surface protruding out of the outer periphery of the nut main body, and the stop ring is in stop fit with the second stop surface; the spiral guide groove is located between the first limiting structure and the second limiting structure. By adopting the scheme, the first stop surface and the second stop surface protruding out of the outer peripheral surface of the nut body are arranged, and the stop rings are respectively matched with the first stop surface and the second stop surface in a stop mode, so that the stop positions between the stop rings and the first stop surface and the stop positions between the stop rings and the second stop surface are protruding out of the spiral guide groove, the situation that the stop positions between the stop rings and the first stop surface and the stop positions between the stop rings and the second stop surface are located in the spiral guide groove or on the extension line of the spiral guide groove in the prior art is avoided, the situation that powder and the like enter the spiral guide groove after the stop collision to cause the stop rings to be blocked is prevented, and the moving reliability of the stop rings is ensured.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the application. In the drawings:

FIG. 1 shows a schematic structural view of a nut assembly provided by an embodiment of the present application;

FIG. 2 shows an exploded view of the nut assembly of FIG. 1;

FIG. 3 is a schematic view showing the abutment of the stop collar and the second stop structure of the nut assembly of FIG. 1;

FIG. 4 is a schematic view of the nut assembly stop collar of FIG. 1 abutting a first stop feature;

fig. 5 shows a schematic structural diagram of an electronic expansion valve according to another embodiment of the present application.

Wherein the above figures include the following reference numerals:

10. a nut body; 11. a spiral guide groove; 12. a mating groove; 13. a limiting block; 14. a guide slope; 15. a demolding groove;

20. a check ring; 21. a screw; 22. a first folding hook; 23. a second folding hook;

30. a first limit structure; 31. a first stop surface; 32. an arc-shaped member; 33. a third folding hook; 34. a fourth folding hook;

40. a second limit structure; 41. a second stop surface;

50. a connecting plate; 51. a limit groove; 52. a balancing groove;

60. a limiting plate;

70. a valve body assembly; 71. a valve cover; 72. a valve seat; 721. a guide sleeve;

80. a rotor assembly; 81. a rotor connection plate; 82. a guide piece; 83. a magnetic rotor;

90. a valve needle assembly.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. It will be apparent that the described embodiments are only some, but not all, embodiments of the application. The following description of at least one exemplary embodiment is merely exemplary in nature and is in no way intended to limit the application, its application, or uses. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.

As shown in fig. 1 to 4, an embodiment of the present application provides a nut assembly including: a nut body 10, the nut body 10 having an internal thread, the outer circumferential surface of the nut body 10 having a spiral guide groove 11; a stopper ring 20, the stopper ring 20 is arranged on the spiral guide groove 11, and the stopper ring 20 is rotatably arranged along the spiral guide groove 11; the first limiting structure 30 is arranged on the nut body 10, the first limiting structure 30 is provided with a first stop surface 31 protruding out of the outer peripheral surface of the nut body 10, and the stop ring 20 is in stop fit with the first stop surface 31; the second limiting structure 40 is arranged on the nut body 10, the second limiting structure 40 is provided with a second stop surface 41 protruding out of the outer peripheral surface of the nut body 10, and the stop ring 20 is in stop fit with the second stop surface 41; wherein the spiral guide groove 11 is located between the first limit structure 30 and the second limit structure 40.

In this embodiment, by providing the first stop surface 31 and the second stop surface 41 protruding from the outer peripheral surface of the nut body 10, and making the stop ring 20 be in stop fit with the first stop surface 31 and the second stop surface 41, respectively, the stop position between the stop ring 20 and the first stop surface 31 and the stop position between the stop ring 20 and the second stop surface 41 protrude from the spiral guide groove 11, thereby avoiding the situation that the stop position between the stop ring 20 and the first stop surface 31 and the stop position between the stop ring 20 and the second stop surface 41 are located in the spiral guide groove 11 or on the extension line of the spiral guide groove 11 in the prior art, preventing the stop ring 20 from being blocked due to powder or the like entering the spiral guide groove 11 after the stop collision, and ensuring the reliability of the movement of the stop ring 20.

Specifically, the first and second stopper structures 30 and 40 respectively limit the stopper ring 20 in two directions along the axis of the nut body 10. The first stop surface 31 and the second stop surface 41 are each disposed clear of the spiral guide groove 11 or an extension of the spiral guide groove 11. By the arrangement, the stop positions of the stop ring 20 and the first stop surface 31 and the stop positions of the stop ring 20 and the second stop surface 41 are not in the spiral guide groove 11 or on the extension line of the spiral guide groove 11, the situation that powder and the like generated after the stop collision of the stop ring 20 enter the spiral guide groove 11 to cause the stop ring 20 to be blocked is prevented, and the moving reliability of the stop ring 20 is ensured.

Alternatively, the outer circumferential surface of the nut body 10 has two oppositely disposed stripping planes parallel to the axis of the nut body 10, and the spiral guide groove 11 is provided on the outer circumferential surface of the nut body 10 between the two stripping planes, the maximum distance between the two stripping planes being smaller than the minimum diameter of the spiral guide groove 11. By the arrangement, the situation that the check ring moves in the spiral guide groove is influenced by the fact that part of die assembly lines generated after die assembly forming of the nut body falls on the spiral guide groove in the prior art is avoided, and the reliability of the nut body 10 is improved.

As shown in fig. 2, the stop ring 20 includes a spiral member 21, and a first folding hook 22 and a second folding hook 23 respectively disposed at two ends of the spiral member 21, where the spiral member 21 is located in the spiral guide groove 11, and the first folding hook 22 is in stop fit with the first limiting structure 30, and the second folding hook 23 is in stop fit with the second limiting structure 40.

In this embodiment, by arranging the first folding hook 22 and the second folding hook 23, the two ends of the stop ring in the prior art are changed into two folding hook stops, so that the stop area is increased, no or less powder is generated in the process of the stop impact, and the performance of the nut component is ensured.

Specifically, the first turndown 22 extends in a direction away from the outer peripheral surface of the nut body 10, the second turndown 23 is located on a side of the screw 21 toward the second limit structure 40, and the second turndown 23 extends in the axial direction of the nut body 10. In the present embodiment, the first turnbuckle 22 is disposed perpendicular to the axis of the nut body 10, and the second turnbuckle 23 is disposed obliquely so as to protrude the stopping position of the stopping ring 20 from the spiral guide groove 11.

Optionally, the axis of the second hook 23 is parallel to the second stop surface 41.

As shown in fig. 3, the second limiting structure 40 is a limiting block, the second stop surface 41 is located on an outer side wall of the limiting block, and the second limiting structure 40 is in stop fit with the outer side wall of the limiting block.

In this embodiment, the second folding hook 23 extends obliquely along the axial direction of the nut body 10, so that the second folding hook 23 protrudes from the spiral guide groove 11, which ensures that the second folding hook 23 can be in stop fit with the second stop surface 41 protruding from the spiral guide groove 11, and ensures the performance of the nut assembly.

As shown in fig. 4, the first limiting structure 30 is a limiting ring, the first stop surface 31 is located on the limiting ring, and the first stop surface 31 is in stop fit with the limiting ring.

In this embodiment, through setting up first limit structure 30 into the spacing collar, can assemble the check ring 20 on nut main part 10 earlier, later install the spacing collar, avoided nut main part and limit structure among the prior art as an organic whole structure for check ring and spacing spring receive the problem of backstop at the in-process of assembling at the nut main part, set up like this, be convenient for realize the automation installation of check ring 20 and nut main part 10, further improved the production efficiency of nut subassembly.

Optionally, the second stop surface 41 is parallel to the axis of the nut body 10.

Specifically, the stop collar includes an arc-shaped member 32 and a third folding hook 33 disposed at one end of the arc-shaped member 32, the third folding hook 33 is located at a side of the arc-shaped member 32 facing the stop collar 20, the third folding hook 33 extends in a direction away from the outer peripheral surface of the nut body 10, the first stop surface 31 is located on an outer side wall of the third folding hook 33, and the outer side wall of the first folding hook 22 is in stop fit with the first stop surface 31. By the arrangement, the third folding hooks 33 are arranged to protrude out of the spiral guide groove 11, so that the stop fit of the first folding hooks 22 and the first stop surface 31 is ensured, the condition that the spiral piece 21 of the stop ring 20 and the arc-shaped piece 32 of the stop ring are directly stopped in the prior art is avoided, and the performance of the nut assembly is ensured.

Further, the limit ring further comprises a fourth folding hook 34 arranged at the other end of the arc-shaped piece 32, the fourth folding hook 34 is positioned at one side of the arc-shaped piece 32 away from the check ring 20, the outer peripheral surface of the nut main body 10 is provided with a matching groove 12, and the arc-shaped piece 32 and/or the fourth folding hook 34 are in limit matching with the matching groove 12. By means of the limiting cooperation of the arc-shaped piece 32 and/or the fourth folding hook 34 and the cooperation groove 12, the movement of the limiting ring along the axis direction of the nut main body 10 and the radial rotation of the nut main body 10 are limited, and the stability and the reliability of the fixed connection of the limiting ring and the nut main body 10 are ensured.

Optionally, the mating groove 12 includes a first clamping groove and a second clamping groove, the first clamping groove is an arc groove, the first clamping groove extends along the circumferential direction of the nut body 10, the second clamping groove extends along the axial direction of the nut body 10, the arc piece 32 is clamped with the first clamping groove, and the fourth folding hook 34 is clamped with the second clamping groove.

Optionally, one end of the nut body 10 has a guiding inclined surface 14 for guiding when assembling the stop ring 20 and the stop ring, and one end of the nut body 10 having the mating groove 12 also has a demolding groove 15 for facilitating demolding after the nut body 10 is molded.

As shown in fig. 2, the nut assembly further includes a connecting plate 50 and a limiting plate 60 connected with the nut body 10, the radial dimension of the limiting plate 60 is larger than the radial dimension of the nut body 10, the connecting plate 50 is detachably sleeved on the nut body 10, and the connecting plate 50 is abutted with the limiting plate 60.

In this embodiment, set up nut body 10 and the components of a whole that can function independently of connecting plate 50 of nut subassembly for connecting plate 50 detachably cup joints on the outer peripheral face of nut body 10 and with limiting plate 60 butt, need put into the condition of connecting plate when having avoided carrying out the inserts to the nut subassembly among the prior art, make nut body 10 and connecting plate 50 can independent machine-shaping respectively and make up together, avoided the unable secondary feed back of nut body that has the connecting plate to use the condition simultaneously, make nut body 10 can better secondary feed back use, improved the production efficiency of nut subassembly.

Optionally, the first limiting structure 30 and the second limiting structure 40 are in clearance fit in the radial direction of the connecting plate 50, and the first limiting structure 30 and the second limiting structure 40 are in interference fit in the circumferential direction of the connecting plate 50. By the arrangement, the connecting plate 50 on the nut main body 10 can move along the radial direction of the nut main body 10 but cannot rotate along the circumferential direction of the nut main body 10, so that the situation that the coaxiality between the nut component and the valve body component 70 cannot be ensured due to the fact that the connecting plate is tightly matched with the valve body component to cause the over-positioning of the nut main body in the radial direction in the process of loading the nut component 70 in the related art is avoided, the coaxiality between the nut component and the valve body component 70 is improved, and the machining precision and the machining cost of the nut component are reduced.

Optionally, the nut body 10 further includes a plurality of limiting blocks 13, the plurality of limiting blocks 13 are disposed on the nut body 10 and the limiting plate 60, the plurality of limiting blocks 13 are disposed around the nut body 10, the connecting plate 50 is provided with a plurality of limiting grooves 51, and the plurality of limiting grooves 51 and the plurality of limiting blocks 13 are in one-to-one corresponding clamping connection.

As shown in fig. 5, another embodiment of the present application provides an electronic expansion valve, which includes a valve body assembly 70, a rotor assembly 80, and the nut assembly described above, wherein the nut assembly is disposed in a cavity of the valve body assembly 70; the rotor assembly 80 includes a rotor connection plate 81, a guide plate 82 and a cylindrical magnetic rotor 83, the magnetic rotor 83 is movably disposed in a cavity of the valve body assembly 70, the rotor connection plate 81 is located in the cavity of the magnetic rotor 83 and fixedly connected with the magnetic rotor 83, the guide plate 82 is located in the cavity of the magnetic rotor 83 and fixedly connected with the rotor connection plate 81, and the guide plate 82 is in limit fit with the stop ring 20 of the nut assembly.

In the present embodiment, by the limit engagement of the stop ring 20 and the guide piece 82, the stop ring 20 abuts against the guide piece 82 during rotation, and drives the guide piece 82 to rotate and move along the axial direction of the nut body 10. Specifically, a gap is formed between the guide plate 82 and the inner wall of the cavity of the magnetic rotor 83, so that friction between the guide plate 82 and the cavity of the magnetic rotor 83 during rotation is avoided. By the arrangement, the defects that the rotor connecting plate and the guide plate of powder metallurgy in the prior art need laser welding, blackening, cracks and the like easily occur after welding are avoided, and the reliability of the rotor assembly 80 is ensured.

Optionally, the electronic expansion valve further includes a valve needle assembly 90, the screw rod of the valve needle assembly 90 is welded to the guide plate 82, the rotor connecting plate 81 is made of Pps, and the Pps rotor connecting plate has better heat insulation performance, so that the problem that the magnetic rotor 83 is cracked when the guide plate 82 is welded to the screw rod of the valve needle assembly 90 can be prevented.

Specifically, the valve body assembly 70 includes a valve cap 71 and a valve seat 72 connected to each other, the stopper 20, the first limiting structure 30 and the second limiting structure 40 are all located in a cavity of the valve cap 71, a portion of the nut body 10 is located in a cavity of the valve seat 72, another portion of the nut body 10 is located in a cavity of the valve cap 71, and the connection plate 50 of the nut assembly is welded to the valve seat 72.

Optionally, the valve body assembly 70 further includes a guide sleeve 721, the guide sleeve 721 is disposed in the cavity of the valve seat 72, the nut body 10 of the nut assembly has a mounting hole, a positioning step is disposed in the mounting hole, the guide sleeve 721 abuts against the positioning step, and the outer circumferential surface of the guide sleeve 721 is in limit fit with the inner side wall of the mounting hole.

The installation process of the electronic expansion valve is as follows, firstly, the connected valve needle assembly 90 and the nut assembly are installed together with the valve seat 72, even though the inner side wall of the nut installation hole is in limit fit with the outer side wall of the guide sleeve 721, then the connecting plate 50 is sleeved on the nut main body 10, force towards the limiting plate 60 is applied to the connecting plate 50, the connecting plate 50 is abutted with the limiting plate 60, the whole nut assembly is driven to move into the cavity of the valve seat 72 until one end of the positioning step is abutted with one end of the guide sleeve 721, a step is formed between the connecting plate 50 and the side wall of the valve seat 72, welding is carried out at the connection position of the connecting plate 50 and the valve seat 72, then the rotor assembly 80 is fixedly connected with the valve needle assembly 90, and finally, the valve cover 71 is fixedly connected with the valve seat 72, so that the installation of the electronic expansion valve is completed.

Optionally, the connection plate 50 further has a plurality of balancing grooves 52, and the cavity of the valve seat 72 and the cavity of the valve cover 71 communicate through the balancing grooves 52.

The above description is only of the preferred embodiments of the present application and is not intended to limit the present application, but various modifications and variations can be made to the present application by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims (10)

1. A nut assembly, comprising:

a nut body (10), wherein the nut body (10) is provided with an internal thread, and the outer peripheral surface of the nut body (10) is provided with a spiral guide groove (11);

a stop ring (20), wherein the stop ring (20) is arranged on the spiral guide groove (11), and the stop ring (20) is rotatably arranged along the spiral guide groove (11);

the first limiting structure (30) is arranged on the nut main body (10), the first limiting structure (30) is provided with a first stop surface (31) protruding out of the outer peripheral surface of the nut main body (10), and the stop ring (20) is in stop fit with the first stop surface (31);

the second limiting structure (40) is arranged on the nut main body (10), the second limiting structure (40) is provided with a second stop surface (41) protruding out of the outer peripheral surface of the nut main body (10), and the stop ring (20) is in stop fit with the second stop surface (41); wherein the spiral guide groove (11) is positioned between the first limit structure (30) and the second limit structure (40).

2. Nut assembly according to claim 1, characterized in that the stop ring (20) comprises a screw (21) and a first folding hook (22) and a second folding hook (23) respectively arranged at two ends of the screw (21), the screw (21) is positioned in the screw guide groove (11), the first folding hook (22) is in stop fit with the first limiting structure (30), and the second folding hook (23) is in stop fit with the second limiting structure (40).

3. Nut assembly according to claim 2, characterized in that the first folding hook (22) extends in a direction away from the outer circumferential surface of the nut body (10), the second folding hook (23) being located on a side of the screw (21) facing the second limiting structure (40), the second folding hook (23) extending in the axial direction of the nut body (10).

4. Nut assembly according to claim 1, characterized in that the second limit structure (40) is a limit block, the second stop surface (41) being located on the outer side wall of the limit block, the second limit structure (40) being in stop fit with the outer side wall of the limit block.

5. Nut assembly according to claim 2, characterized in that the first stop structure (30) is a stop collar, the first stop surface (31) being located on the stop collar, the first stop surface (31) and the stop collar being in stop fit.

6. Nut assembly according to claim 5, characterized in that the stop collar comprises an arc-shaped member (32) and a third folding hook (33) arranged at one end of the arc-shaped member (32), the third folding hook (33) being located at one side of the arc-shaped member (32) towards the stop collar (20), the third folding hook (33) extending in a direction away from the outer circumferential surface of the nut body (10), the first stop surface (31) being located on the outer side wall of the third folding hook (33), the outer side wall of the first folding hook (22) being in stop fit with the first stop surface (31).

7. Nut assembly according to claim 6, characterized in that the stop collar further comprises a fourth folding hook (34) arranged at the other end of the arc-shaped piece (32), the fourth folding hook (34) is positioned at one side of the arc-shaped piece (32) facing away from the stop collar (20), the outer circumferential surface of the nut main body (10) is provided with a matching groove (12), and the arc-shaped piece (32) and/or the fourth folding hook (34) are in limit fit with the matching groove (12).

8. Nut assembly according to claim 1, characterized in that it further comprises a connecting plate (50) and a limiting plate (60) connected to the nut body (10), the radial dimension of the limiting plate (60) being greater than the radial dimension of the nut body (10), the connecting plate (50) being removably sleeved on the nut body (10), the connecting plate (50) being in abutment with the limiting plate (60).

9. An electronic expansion valve, characterized in that it comprises a valve body assembly (70), a rotor assembly (80) and a nut assembly according to any of claims 1 to 8, said nut assembly being arranged in a cavity of said valve body assembly (70); the rotor assembly (80) comprises a rotor connecting plate (81), a guide plate (82) and a cylindrical magnetic rotor (83), wherein the magnetic rotor (83) is movably arranged in a cavity of the valve body assembly (70), the rotor connecting plate (81) is positioned in the cavity of the magnetic rotor (83) and fixedly connected with the magnetic rotor (83), the guide plate (82) is positioned in the cavity of the magnetic rotor (83) and fixedly connected with the rotor connecting plate (81), and the guide plate (82) is in limit fit with a stop ring (20) of the nut assembly.

10. The electronic expansion valve according to claim 9, wherein the nut assembly is the nut assembly of claim 8, the valve body assembly (70) comprises a valve cap (71) and a valve seat (72) that are connected to each other, the stop ring (20), the first limiting structure (30) and the second limiting structure (40) are all located in the cavity of the valve cap (71), a portion of the nut body (10) is located in the cavity of the valve seat (72), another portion of the nut body (10) is located in the cavity of the valve cap (71), and the connecting plate (50) of the nut assembly and the valve seat (72) are welded.