Driving structure and electronic expansion valve with same

Abstract

The utility model provides a driving structure and an electronic expansion valve with the same, the driving structure comprises a nut seat, the outer side wall of the nut seat is provided with a spiral guide rail, and the two ends of the spiral guide rail are oppositely provided with an upper limiting structure and a lower limiting structure; the stop ring is rotatably arranged in the spiral guide rail, a first bending part and a second bending part are oppositely arranged at the two ends of the stop ring, the first bending part is used for being matched with the upper limiting structure in a limiting mode, and the second bending part is used for being matched with the lower limiting structure in a limiting mode; the guide rod can be matched with the first bending part or the second bending part to drive the check ring to rotate, and when the guide rod drives the check ring to rotate towards the upper limiting structure, the guide rod abuts against the second bending part; when the guide rod drives the stop ring to rotate towards the lower limiting structure, the guide rod abuts against the first bending part. By means of the technical scheme, the problem that in the prior art, when an electronic expansion valve stops a gear, large noise can be generated can be solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to electronic expansion valve technical field, specifically, drive structure and electronic expansion valve with it are provided. BACKGROUND

[0002] At present, in the electronic expansion valve, the solenoid is usually used to drive the rotor, so that the rotor drives the valve needle to move relative to the valve port to realize the regulation of flow. In order to limit the position of the valve needle relative to the valve port, the rotor has relatively arranged upper stop state and lower stop state.

[0003] In the prior art, a spiral track is usually arranged on the outside of the nut seat of the electronic expansion valve, and a limiting ring is arranged on the spiral track. The limiting ring is a spiral structure. The rotor is drivingly connected with a driving rod. The driving rod abuts against the bending structure during the rotation of the rotor, thereby driving the limiting ring to rotate. The upper limiting structure and the lower limiting structure are arranged on the nut seat. When the limiting ring rotates to the upper stop state with the rotor, the driving rod cannot continue to rotate, thereby achieving the rotation stop of the rotor. Similarly, when the limiting ring rotates to the lower stop state with the rotor, the rotation stop of the rotor can be achieved.

[0004] The limiting ring is provided with a bending structure. The driving rod pushes the bending structure until it directly collides with the upper limiting structure or the lower limiting structure, that is, the bending structure is located between the driving rod and the limiting structure and is in direct contact with the driving rod and the limiting structure at the same time. The collision will produce a large noise, which affects the use experience of the electronic expansion valve. Utility model content

[0005] The utility model provides a kind of drive structure and electronic expansion valve with it, to solve the problem that the electronic expansion valve in prior art will produce large noise when stopping.

[0006] According to one aspect of the utility model, a drive structure is provided, which includes: a nut seat, an outer side wall of the nut seat is provided with a spiral guide rail, and the two ends of the spiral guide rail are provided with an upper limiting structure and a lower limiting structure opposite to each other;A stop ring is rotatably arranged in the spiral guide rail, and the two ends of the stop ring are provided with a first bending part and a second bending part opposite to each other, the first bending part is used for limiting cooperation with the upper limiting structure, and the second bending part is used for limiting cooperation with the lower limiting structure;A driving rod is arranged between the first bending part and the second bending part, and the driving rod can cooperate with the first bending part or the second bending part to drive the stop ring to rotate. When the driving rod drives the stop ring to rotate towards the upper limiting structure, the driving rod abuts against the second bending part. When the driving rod drives the stop ring to rotate towards the lower limiting structure, the driving rod abuts against the first bending part.

[0007] The technical scheme is applied, the driving rod can drive the stop ring to rotate around the spiral guide rail on the nut seat, when the driving rod rotates to abut against the first bending part, the driving rod continues to rotate to drive the stop ring to continue rotating along the spiral guide rail, the second bending part abuts against the lower limiting structure, the driving rod is not in contact with the second bending part, and noise during abutment and collision of the second bending part and the lower limiting structure can be reduced; when the driving rod reversely rotates to abut against the second bending part, the driving rod can drive the stop ring to reversely rotate along the spiral guide rail, the stop ring moves towards the upper stop structure, the first bending part abuts against the upper limiting structure, the driving rod is not in contact with the first bending part, and noise during abutment and collision of the first bending part and the upper limiting structure can be reduced. When the first bending part abuts against the upper limiting structure, only the first bending part directly contacts the upper limiting structure by applying the technical scheme; when the second bending part abuts against and collides with the lower limiting structure, only the second bending part directly contacts the lower limiting structure, the situation that the driving rod, the bending structure and the limiting structure simultaneously collide in the traditional technical scheme is prevented, noise during use of the electronic expansion valve is reduced, and user experience is improved.

[0008] Further, the first bending part and the second bending part extend along the radial direction of the nut seat, the first bending part, the second bending part, the upper limiting structure and the lower limiting structure are projected on a projection plane perpendicular to the axis of the stop ring; when the first bending part abuts against the upper limiting structure, the first bending part is located between the upper limiting structure and the second bending part on the projection plane; when the second bending part abuts against the lower limiting structure, the second bending part is located between the lower limiting structure and the first bending part on the projection plane.

[0009] Further, the first bending part and the second bending part are projected on a projection plane perpendicular to the axis of the stop ring, and an included angle is formed between the first bending part and the second bending part in the winding direction of the stop ring on the projection plane, the included angle is positive, and the driving rod is rotatably arranged on the outer side of the included angle.

[0010] Further, the driving structure has an upper stop position and a lower stop position, when the driving structure is in the upper stop position, the first bending part is limited and matched with the upper limiting structure, and the driving rod is matched with the first bending part and the second bending part; when the driving structure is in the lower stop position, the second bending part is limited and matched with the lower limiting structure, and the driving rod is matched with the first bending part and the second bending part.

[0011] Further, the driving structure further comprises a driving part, the driving part is drivingly connected with the driving rod, and the torque of the stop ring is smaller than the driving torque of the driving part when the driving structure is in the upper stop position or the lower stop position.

[0012] Further, the torque of the stop ring is 1 / 2 of the driving torque of the driving part.

[0013] Further, the included angle is α, and α≤15°.

[0014] Further, the upper limiting structure comprises a first limiting protrusion, and the lower limiting structure comprises a second limiting protrusion, the first limiting protrusion and the second limiting protrusion are arranged on the outer side wall of the nut seat, the first bending part is matched with the side wall stop of the first limiting protrusion, and the second bending part is matched with the side wall stop of the second limiting protrusion.

[0015] Further, the guide rod is made of plastic material.

[0016] Further, the driving structure further comprises a driving part, the driving part is used for driving the guide rod to rotate, and the driving part comprises a rotor body, and the rotor body is integrally formed with the guide rod by injection molding.

[0017] According to another aspect of the utility model, an electronic expansion valve is provided, and the electronic expansion valve comprises the driving structure.

[0018] By applying the driving structure to the electronic expansion valve provided by the application, the working noise of the electronic expansion valve can be reduced during the process of adjusting the flow, and the use experience of the electronic expansion valve is improved. BRIEF DESCRIPTION OF DRAWINGS

[0019] The drawings accompanying the specification of the present application form a part thereof, serve to provide further understanding of the present application, and together with the specification explain the present application. The use of the same reference numbers in different drawings and / or discussion indicates similar or identical items.

[0020] Figure 1 Fig. 1 shows a structure schematic view of a nut seat and a stop ring provided by the utility model;

[0021] Figure 2 Fig. 2 shows a side view of the nut seat and the stop ring provided by the utility model;

[0022] Figure 3 Fig. 3 shows a cross-sectional view of the driving structure from a side view angle provided by the utility model;

[0023] Figure 4 Fig. 4 shows a cross-sectional view of the driving structure from a top view angle provided by the utility model;

[0024] Figure 5 Fig. 5 shows a structure schematic view of a stop ring provided by the utility model;

[0025] Figure 6 Fig. 6 shows a top view of the stop ring provided by the utility model;

[0026] Figure 7 Fig. 7 shows a structure schematic view of a rotor body provided by the utility model;

[0027] Figure 8 The side view of the side view angle of the rotor body is shown.

[0028] Among them, the above-mentioned drawings include the following reference signs:

[0029] 10, nut seat; 11, spiral guide rail; 12, first limiting protrusion; 13, second limiting protrusion;

[0030] 20, stop ring; 21, first bending part; 22, second bending part;

[0031] 30, guide rod;

[0032] 40, rotor body. DETAILED DESCRIPTION

[0033] The technical solutions in the embodiments of the utility model will be apparently and completely described in combination with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. The description of at least one exemplary embodiment is only illustrative in nature, and by no means as any limitation on the utility model and its application or use. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0034] As Figures 1 to 8 shown, the utility model embodiment provides a drive structure, drive structure includes nut seat 10, stop ring 20, guide rod 30. Among them, the outer side wall of nut seat 10 is provided with spiral guide rail 11, and the both ends of spiral guide rail 11 are oppositely provided with upper limiting structure and lower limiting structure. Stop ring 20 is a torsion spring structure, stop ring 20 is rotatably arranged in spiral guide rail 11, and the both ends of stop ring 20 are oppositely provided with first bending part 21 and second bending part 22, first bending part 21 is used for limiting cooperation with upper limiting structure, and second bending part 22 is used for limiting cooperation with lower limiting structure. Guide rod 30 is arranged between first bending part 21 and second bending part 22, and guide rod 30 can cooperate with first bending part 21 or second bending part 22 to drive stop ring 20 to rotate, when guide rod 30 drives stop ring 20 to rotate towards upper limiting structure, guide rod 30 abuts against second bending part 22, when guide rod 30 drives stop ring 20 to rotate towards lower limiting structure, guide rod 30 abuts against first bending part 21.

[0035] By applying the technical solution of this utility model, the guide rod 30 can drive the stop ring 20 to rotate around the spiral guide rail 11 on the nut seat 10. When the guide rod 30 rotates to abut against the first bent part 21, the guide rod 30 continues to rotate, which will drive the stop ring 20 to continue to rotate along the spiral guide rail 11, so that the second bent part 22 abuts against the lower limit structure. The guide rod 30 and the second bent part 22 are not in contact, which can reduce the noise when the second bent part 22 abuts against the lower limit structure. When the guide rod 30 rotates in the opposite direction to abut against the second bent part 22, the guide rod 30 can drive the stop ring 20 to rotate in the opposite direction along the spiral guide rail 11, so that the stop ring 20 moves upward to the stop structure, so that the first bent part 21 abuts against the upper limit structure. The guide rod 30 and the first bent part 21 are not in contact, which can reduce the noise when the first bent part 21 collides with the upper limit structure. By applying the technical solution of this application, when the first bending part 21 is in contact with the upper limit structure, only the first bending part 21 is in direct contact with the upper limit structure; when the second bending part 22 is in contact with the lower limit structure, only the second bending part 22 is in direct contact with the lower limit structure. This prevents the simultaneous collision of the guide rod, bending structure and limit structure as in the traditional technical solution, thereby reducing noise during the use of the electronic expansion valve and improving the user experience.

[0036] like Figure 5 and Figure 6 As shown, the first bend 21 and the second bend 22 are projected onto a projection plane perpendicular to the axis of the stop ring 20. On the projection plane, the first bend 21 and the second bend 22 have an angle between them along the winding direction of the stop ring 20. In this application, the counterclockwise direction is defined as the positive direction. Figure 6 As shown, in the top view of the stop ring 20, the angle α formed counterclockwise between the second bend 22 and the first bend 21 is a positive value. The clockwise direction is defined as the negative direction, and in the top view of the stop ring 20, the angle β formed clockwise between the second bend 22 and the first bend 21 is a negative value.

[0037] In the present application, the included angle is positive, and the first bending portion 21 and the second bending portion 22 form a spacing range within the included angle range, and the guide rod 30 is rotatably arranged outside the included angle, that is, the guide rod 30 is rotatably arranged outside the spacing range. In this way, the length of the torsional spring body of the stop ring 20 of the torsional spring structure is S*(n+α / 360). Wherein, S is the length of each integer ring of the stop ring 20, n is the number of integer rings, and α is the angle formed between the first bending portion 21 and the second bending portion 22. The total number of rings of the stop ring 20 provided in the present application is the sum of the number of integer rings and the number of single rings of angle α. Because the stop ring 20 in the present application increases the angle α compared to the multiple integer rings, when the first bending portion 21 abuts against the upper limit structure, the second bending portion 22 can continue to move, or when the second bending portion 22 abuts against the lower limit structure, the first bending portion 21 can continue to move, so as to force the stop ring 20 to twist and achieve buffering.

[0038] Further, the driving structure has an upper stop position and a lower stop position. When the driving structure is in the upper stop position, the driving structure of the electronic expansion valve drives the valve needle to move to the upper limit position of the valve needle, at which time the first bending portion 21 rotates with the stop ring 20 to limit cooperation with the upper limit structure, and the guide rod 30 abuts and cooperates with the first bending portion 21 and the second bending portion 22. When the driving structure is in the lower stop position, the driving structure of the electronic expansion valve drives the valve needle to move to the lower limit position of the valve needle, at which time the second bending portion 22 rotates with the stop ring 20 to limit cooperation with the lower limit structure, and the guide rod 30 abuts and cooperates with the first bending portion 21 and the second bending portion 22. In this way, when the driving structure is in the upper stop position, the guide rod 30 can still abut against the first bending portion 21, or when the driving structure is in the lower stop position, the guide rod 30 can still abut against the second bending portion 22, thereby achieving limiting of the guide rod 30. Because of the elastic force of the annular structure of the stop ring 20 itself, in the above process, after the second bending portion 22 abuts against the lower limit, the guide rod 30 continues to rotate, the guide rod 30 will press the first bending portion 21, forcing the stop ring 20 to twist, and the twisting of the stop ring 20 will buffer the guide rod 30, so as to reduce the loud noise caused by the direct impact of the guide rod 30 and the second bending portion 22. After the first bending portion 21 abuts against the upper limit structure, the guide rod 30 will press the second bending portion 22, forcing the stop ring 20 to twist, and the twisting of the stop ring 20 will buffer the guide rod 30, so as to reduce the loud noise caused by the direct impact of the guide rod 30 and the first bending portion 21, thereby further improving the user experience.

[0039] By applying the technical solution of the present application, the noise when the first bending part 21 contacts the upper limiting structure and the noise when the second bending part 22 contacts the lower limiting structure can be reduced, and the noise when the driving structure rotates to the state that the guide rod 30, the second bending part 22 and the first bending part 21 simultaneously contact each other can be reduced again, so as to realize multiple noise reduction of the driving structure during rotation and reduce the noise of the electronic expansion valve.

[0040] Specifically, the driving structure further comprises a driving part, and the driving part is drivingly connected with the guide rod 30. When the driving structure is in the upper stop position or the lower stop position, the torque of the stop ring 20 is smaller than the driving torque of the driving part. In this way, when the driving structure is switched to the upper stop position or the lower stop position, the driving force of the driving part cannot force the stop ring 20 to be twisted, so that the driving structure cannot complete the stop, and the stability of the electronic expansion valve in use is ensured.

[0041] In a specific embodiment of the present application, the torque of the stop ring 20 is 1 / 2 of the driving torque of the driving part. In this way, when the guide rod 30 rotates bidirectionally, the force applied by the guide rod 30 to the stop ring 20 is the same, so that the first bending part 21 or the second bending part 22 is prevented from being unevenly stressed during the stop, and the service life of the stop ring 20 can be improved.

[0042] Further, the included angle between the first bending part 21 and the second bending part 22 formed along the winding direction of the stop ring 20 on the projection plane perpendicular to the axis direction of the nut seat 10 is a, and a≤15°. When a is greater than 15°, when the driving structure rotates to the upper stop position or the lower stop position, a larger driving force needs to be applied to the stop ring 20 to force the stop ring 20 to be twisted, which requires a higher driving effect of the driving structure, and when the driving structure is switched to the upper stop position or the lower stop position, the twisting amplitude of the stop ring 20 is large, which affects the service life of the stop ring 20. By setting a≤15°, the use requirement of the driving structure can be reduced, and the service life of the stop ring 20 is ensured. Specifically, a can be set to 5°, 10° or 15°.

[0043] Specifically, the upper limiting structure comprises a first limiting protrusion 12, and the lower limiting structure comprises a second limiting protrusion 13. The first limiting protrusion 12 and the second limiting protrusion 13 are arranged on the outer side wall of the nut seat 10. The first bending part 21 is in abutment with the side wall of the first limiting protrusion 12, and the second bending part 22 is in abutment with the side wall of the second limiting protrusion 13. The first limiting protrusion 12 and the second limiting protrusion 13 can limit the continuous rotation of the stop ring 20, so as to realize the upper stop or the lower stop of the driving structure.

[0044] Further, the abutting surface of the first limiting protrusion 12 matched with the first bending part 21 can be processed as a groove structure adapting to the shape of the side wall of the first bending part 21, and the abutting surface of the second limiting protrusion 13 matched with the second bending part 22 can also be processed as a groove structure adapting to the shape of the side wall of the second bending part 22, so as to prevent the first limiting protrusion 12 from slipping with the first bending part 21 and causing the stop failure.

[0045] Specifically, in the present application, the first bending part 21 and the second bending part 22 extend along the direction perpendicular to the axis of the nut seat 10, so that the first bending part 21 and the second bending part 22 are perpendicular to the driving rod 30 as much as possible, so as to prevent the stop ring 20 from deflecting and ensure that the stop ring 20 can normally twist during the stopping process to provide a buffering effect and reduce noise.

[0046] Specifically, in the present application, the spiral guide rail 11 can be directly processed on the side wall of the nut seat 10, or can be formed by a guide rail sleeve of a spiral structure on the nut seat 10.

[0047] In the prior art, the guide rod and other guide structures are usually made of metal materials, and there is a large wear between the metal guide rod and the metal stop ring 20. In the present application, the driving rod 30 can be made of plastic material to reduce the wear with the metal stop ring 20 and further increase the service life of the stop ring 20.

[0048] Referring to Figure 3 , Figure 7 and Figure 8 , the driving structure further includes a driving part for driving the driving rod 30 to rotate, and the driving part includes a rotor body 40. In the prior art, the driving rod is usually fixed on the connecting plate of the rotor body and extends along the axial direction of the nut seat. In this way, when the driving rod cooperates with the stop ring, the force arm of the driving rod is long, and the connection between the driving rod and the connecting plate is prone to breakage. In the present application, the rotor body 40 and the driving rod 30 are integrally formed by injection molding. In this way, the breakage of the driving rod 30 can be prevented, and the stability of the driving rod 30 can be ensured.

[0049] According to the embodiments of the present application, an electronic expansion valve is also provided. By applying the above-mentioned driving structure to the electronic expansion valve provided by the present application, the working noise of the electronic expansion valve can be reduced during the process of adjusting the flow, and the use experience of the electronic expansion valve can be improved.

[0050] It is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and / or "comprising," when used in this specification, specify the presence of stated features, steps, operations, devices, components and / or combinations thereof, but do not preclude the presence or addition of one or more other features, steps, operations, devices, components and / or combinations thereof.

[0051] The relative arrangement of parts and steps, numerical expressions, and numerical values set forth in these embodiments are not intended to limit the scope of the present application unless otherwise specifically stated. At the same time, it should be understood that the sizes of the various parts shown in the drawings are not drawn in accordance with the actual proportion relationship for the convenience of description. The technology, methods and devices known to those skilled in the related art can not be discussed in detail, but should be considered as part of the specification under appropriate circumstances. In all examples shown and discussed herein, any specific value should be interpreted as merely exemplary and not as a limitation. Therefore, other examples of exemplary embodiments can have different values. It should be noted that similar reference numbers and letters represent similar items in the following drawings, so further discussion is not needed in subsequent drawings once an item is defined in one drawing.

[0052] In the description of the present application, it should be understood that the orientation words such as "front, back, up, down, left, right", "horizontal, vertical, perpendicular, horizontal" and "top, bottom" and the like indicate the orientation or positional relationship shown in the drawings, which are only for the convenience of describing the present application and simplifying the description, and do not indicate and imply that the indicated device or element must have a particular orientation or be constructed and operated in a particular orientation, therefore it cannot be understood as a limitation on the scope of protection of the present application; the orientation words "inner, outer" refer to the inner and outer of the contour of each component itself.

[0053] For purposes of the description hereinafter, spatial relative terms, such as "above", "below", "upper", "lower", and the like, can be used to describe the relative position of one element or feature to another as illustrated in the figures. It will be understood that the spatial relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientations depicted in the figures. For example, if the device in the figures is turned over, elements described as "above" or "up" other elements or features would then be oriented "below" or "down" the other elements or features. Thus, the exemplary term "above" can encompass both an orientation of above and below. The device can be otherwise oriented (rotated 90 degrees or at other orientations) and the spatial relative descriptors used herein interpreted accordingly.

[0054] In addition, it should be noted that the use of "first", "second", and the like words of distinction do not connote any meaning of importance, but are used solely to differentiate one element from another, and are used in the context of this application without implying any specific order, or order of precedence. Accordingly, a first element that follows an operation can be performed before a second element that precedes the operation.

[0055] The preferred embodiments of the present application have been described above with the purpose of enabling not only the best modes of practicing the application known to the inventors at this time, but also of enabling others skilled in the art to utilize the application in various embodiments and with various modifications as are suited to the particular use contemplated. Therefore, the above description is intended to be illustrative, but not restrictive, of the scope of the present application. All patents and patent applications mentioned herein are incorporated by reference in their entirety.

Claims

1. A driving structure, characterized in that, The driving structure includes: Nut seat (10), the outer side wall of the nut seat (10) is provided with a spiral guide rail (11), and the two ends of the spiral guide rail (11) are provided with an upper limit structure and a lower limit structure respectively; A stop ring (20) is rotatably disposed inside the spiral guide rail (11). The two ends of the stop ring (20) are provided with a first bent portion (21) and a second bent portion (22) respectively. The first bent portion (21) is used to limit the upper limit structure, and the second bent portion (22) is used to limit the lower limit structure. A guide rod (30) is disposed between the first bent portion (21) and the second bent portion (22). The guide rod (30) can cooperate with the first bent portion (21) or the second bent portion (22) to drive the stop ring (20) to rotate. When the guide rod (30) drives the stop ring (20) to rotate toward the upper limit structure, the guide rod (30) abuts against the second bent portion (22). When the guide rod (30) drives the stop ring (20) to rotate toward the lower limit structure, the guide rod (30) abuts against the first bent portion (21).

2. The driving structure according to claim 1, characterized in that, Both the first bend (21) and the second bend (22) extend radially along the nut seat (10). The first bend (21), the second bend (22), the upper limit structure, and the lower limit structure are projected onto a projection plane perpendicular to the axis of the stop ring (20). When the first bend (21) abuts against the upper limit structure, the first bend (21) is located between the upper limit structure and the second bend (22) on the projection plane. When the second bend (22) abuts against the lower limit structure, the second bend (22) is located between the lower limit structure and the first bend (21) on the projection plane.

3. The driving structure according to claim 1, characterized in that, The first bend (21) and the second bend (22) are projected onto a projection plane perpendicular to the axis of the stop ring (20). On the projection plane, the first bend (21) and the second bend (22) have an angle between them along the winding direction of the stop ring (20). The angle is positive. The guide rod (30) is rotatably disposed outside the angle.

4. The driving structure according to claim 1, characterized in that, The drive structure has an upper stop position and a lower stop position. When the drive structure is in the upper stop position, the first bent part (21) is limited to the upper limit structure, and the guide rod (30) abuts against the first bent part (21) and the second bent part (22). When the drive structure is in the lower stop position, the second bent part (22) is limited to the lower limit structure, and the guide rod (30) abuts against the first bent part (21) and the second bent part (22).

5. The driving structure according to claim 4, characterized in that, The drive structure also includes a drive unit, which is drivenly connected to the guide rod (30). When the drive structure is in the upper stop position or the lower stop position, the torque of the stop ring (20) is less than the drive torque of the drive unit.

6. The driving structure according to claim 5, characterized in that, The torque of the stop ring (20) is 1 / 2 of the driving torque of the drive unit.

7. The driving structure according to claim 3, characterized in that, The included angle is α, where α ≤ 15°.

8. The driving structure according to claim 1, characterized in that, The upper limit structure includes a first limiting protrusion (12), and the lower limit structure includes a second limiting protrusion (13). The first limiting protrusion (12) and the second limiting protrusion (13) are both disposed on the outer side wall of the nut seat (10). The first bent portion (21) cooperates with the side wall stop of the first limiting protrusion (12), and the second bent portion (22) cooperates with the side wall stop of the second limiting protrusion (13).

9. The driving structure according to claim 1, characterized in that, The guide rod (30) is made of plastic.

10. The driving structure according to claim 1, characterized in that, The driving structure also includes a driving unit for driving the guide rod (30) to rotate. The driving unit includes a rotor body (40), and the rotor body (40) and the guide rod (30) are integrally injection molded.

11. An electronic expansion valve, characterized in that, The electronic expansion valve includes the drive structure according to any one of claims 1 to 10.

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