Nut structure and electric valve

Abstract

The present application provides a nut structure and an electric valve. The nut structure comprises a nut body, a position limiting structure, a spiral guide groove, and a stop ring. The position limiting structure is installed to protrude from the outer circumference of the nut body. The position limiting structure has a stop surface and a mating surface. The spiral guide groove is installed on the outer circumference of the nut body. The spiral guide groove is located on one side where the mating surface of the position limiting structure is provided. One end of the spiral guide groove is started from the mating surface or from the extension direction of the mating surface. The stop ring is installed to be rotatable within the spiral guide groove. The stop ring is mated to stop with the stop surface. By adopting the above technical solution, the mating surface functions to guide the installation of the stop ring during the process of assembling the stop ring to the nut body. The end of the stop ring closest to the spiral guide groove is directly entered into the spiral guide groove along the extension direction of the mating surface. Accordingly, the installation accuracy and installation efficiency of the stop ring are improved. The stop ring is fitted to stop with the stop surface, limiting the range of movement on the helical guide groove of the stop ring and ensuring the reliability of the nut structure.

Description

Technology Field

[0001] This application claims priority to a patent application filed with the National Intellectual Property Administration of China on March 4, 2022, the application number of which is 202220476600.5 and the title of the invention is "Nut structure and electric valve". This application claims priority to a patent application filed with the National Intellectual Property Administration of China on March 4, 2022, the application number of which is 202220482141.1 and the title of the invention is "Nut structure and electric valve".

[0002] This application relates to the field of electric valve technology, and more specifically to nut structures and electric valves. Background Technology

[0003] In the nut structure of a conventional electric valve, a situation may occur where the stop ring or the position limiting structure is damaged due to collision and friction between the stop ring and the edges of the position limiting structure during the process of assembling the stop ring to the nut body. Additionally, to prevent collision between the stop ring and the edges of the spiral guide groove when the stop ring rotates into the spiral guide groove, the movement of the stop ring must be guided manually. However, when guided manually, the guidance effect and efficiency are relatively low, which reduces the assembly efficiency and effectiveness of the nut structure.

[0004] The present application aims to improve the installation efficiency and installation accuracy of a stop ring in the prior art by providing a nut structure and an electric valve.

[0005] To achieve the above objective, in one aspect of the present application, the present application provides a nut structure. The nut structure comprises a nut body, a position limiting structure, a helical guide groove, and a stop ring. The position limiting structure is installed to protrude from the outer circumference of the nut body. The position limiting structure has a stop surface and a mating surface. The helical guide groove is installed on the outer circumference of the nut body. The helical guide groove is located on one side where the mating surface of the position limiting structure is provided. One end of the helical guide groove is started from the mating surface or from the extension direction of the mating surface. The stop ring is installed to be rotatably within the helical guide groove. The stop ring is mated to stop with the stop surface.

[0006] In addition, the fitting surface includes a first guide surface. The first guide surface is installed obliquely with respect to the radial direction of the nut body. The inclination direction of the first guide surface is the same as the spiral direction of the spiral guide groove, so that it guides the stop ring when mounting the stop ring.

[0007] Additionally, the position limiting structure further comprises a bottom surface. The bottom surface is located on one side of the nut body where a spiral guide groove is provided. Both ends of the bottom surface are connected to a stop surface and a first guide surface, respectively.

[0008] In addition, the bottom surface is installed perpendicular to the axis of the nut body. On a projection plane perpendicular to the first guide surface and the bottom surface, the connection position between the first guide surface and the bottom surface is point A. The angle of the tangent passing through point A of the bottom surface and the first guide surface is q, and 90°≤q≤180°.

[0009] In addition, in the direction perpendicular to the tangent, the maximum width of the position limiting structure is d, and 0.5mm≤d≤1mm.

[0010] In addition, the spiral guide groove extends along a predetermined spiral. On a projection plane perpendicular to the stop plane and parallel to the axis of the nut body, the stop plane and the spiral form a narrow angle C, and 60°≤C≤100°.

[0011] Additionally, the position limiting structure further comprises a top surface installed to face the bottom surface. The fitting surface further includes a second guide surface connected to the first guide surface. Both ends of the top surface are connected to the stop surface and the second guide surface, respectively.

[0012] In addition, the top surface is installed at an angle relative to the radial direction of the nut body. The direction of inclination of the top surface is the same as the spiral direction of the spiral guide groove.

[0013] In addition, the bottom surface is installed parallel to the radial direction of the nut body. The top surface and the bottom surface form a narrow angle α, and 5°≤α≤15°.

[0014] Additionally, the first guide surface includes a first arc-shaped section, a straight section, and a second arc-shaped section connected in sequence. The first arc-shaped section is connected to the second guide surface, and the second arc-shaped section is connected to the bottom surface. The straight section and the bottom surface form a narrow angle β, and 10° ≤ β ≤ 50°.

[0015] In another aspect of the present application, an electric valve is provided. The electric valve comprises a valve body assembly and a nut structure. The nut structure is located within the valve body assembly.

[0016] A nut structure is provided by applying the technical solution of the present application. The nut structure includes a nut body, a position limiting structure, a spiral guide groove, and a stop ring. The position limiting structure is installed to protrude from the outer circumference of the nut body. The position limiting structure has a stop surface and a mating surface. The spiral guide groove is installed on the outer circumference of the nut body. The spiral guide groove is located on one side where the mating surface of the position limiting structure is provided. One end of the spiral guide groove is started from the mating surface or the extension direction of the mating surface. The stop ring is installed to be rotatable within the spiral guide groove. The stop ring is mated to stop with the stop surface. By adopting the above technical solution, the mating surface functions to guide the installation of the stop ring during the process of assembling the stop ring to the nut body. The end of the stop ring closest to the spiral guide groove is directly entered into the spiral guide groove along the extension direction of the mating surface. Therefore, the problem of the stop ring or the spiral guide groove being easily damaged due to manual guidance for the installation of the stop ring in the prior art is prevented, thereby improving the installation accuracy and efficiency of the stop ring. After the stop ring is assembled, one end of the stop ring, which is close to the position limiting structure, is aligned to stop with the stop surface. This limits the range of movement of the stop ring along the spiral guide groove while preventing the stop ring from disengaging from the groove during movement. This ensures the reliability of the nut structure. Brief explanation of the drawing

[0017] The drawings attached to the specification, which constitute part of this application, are intended to aid in a further understanding of this application. Exemplary embodiments of this application and descriptions thereof are intended to interpret this application and do not limit it. The description of the attached drawings is as follows. FIG. 1 is a structural diagram of a nut structure according to an embodiment of the present application. Figure 2 is a structural diagram of the nut body and spiral guide groove of the nut structure of Figure 1. Figure 3 is an enlarged view of the selected location in Figure 2. Figure 4 is a schematic diagram showing the dimensions of Figure 3. FIG. 5 is another structural diagram of a nut structure according to an embodiment of the present application. Figure 6 is a front view of the nut structure of Figure 5. Figure 7 is a structural diagram of the stop ring in the nut structure of Figure 5. FIG. 8 is a schematic diagram showing the stop ring and the second position limiting structure in contact in the nut structure of FIG. 5. FIG. 9 is a structural diagram of an electric valve according to another embodiment of the present application. Specific details for implementing the invention

[0018] The technical solution of the embodiments of the present application is described clearly and completely below with reference to the drawings of the embodiments of the present application. Of course, the described embodiments are only some of the embodiments, not all of the embodiments of the present application. One or more exemplary embodiments described below are for illustrative purposes only and do not limit the present application and its application or use. All other embodiments obtained by those skilled in the art without creative work based on the embodiments of the present application fall within the scope of protection of the present application.

[0019] As illustrated in FIGS. 1 through 8, an embodiment of the present application provides a nut structure. It includes a nut body (10), a position limiting structure (20), a spiral guide groove (30), and a stop ring (40). The position limiting structure (20) is installed to protrude from the outer surface of the nut body (10). The position limiting structure (20) has a stop surface (21) and a matching surface (22). The spiral guide groove (30) is installed on the outer surface of the nut body (10). The spiral guide groove (30) is located on one side of the position limiting structure (20) where the matching surface (22) is provided. One end of the spiral guide groove (30) is started from the matching surface (22) or from the extension direction of the matching surface (22). The stop ring (40) is installed to be rotatable within the spiral guide groove (30). The stop ring (40) is matched to stop with the stop surface (21).

[0020] In this embodiment, during the process of assembling the stop ring (40) to the nut body (10), the fitting surface (22) functions to guide the installation of the stop ring (40). Specifically, the end of the stop ring (40) that is close to the spiral guide groove (30) is directly entered into the spiral guide groove (30) along the extension direction of the fitting surface (22). Therefore, the problem of the stop ring or the spiral guide groove being easily damaged due to manual guidance for the installation of the stop ring in the prior art is prevented, thereby improving the installation accuracy and efficiency of the stop ring (40). After the assembly of the stop ring (40) is completed, the end of the stop ring (40) that is close to the position limiting structure (20) is fitted to stop with the stop surface (21). This limits the range of movement of the stop ring (40) on the spiral guide groove (30) and simultaneously prevents the stop ring (40) from coming out of the spiral guide groove (30) during the movement process. This ensures the reliability of the nut structure.

[0021] As illustrated in FIGS. 2 and 3, the fitting surface (22) includes a first guide surface (221). The first guide surface (221) is installed obliquely with respect to the radial direction of the nut body (10). The inclination direction of the first guide surface (221) is the same as the spiral direction of the spiral guide groove (30) so as to guide the stop ring (40) when mounting the stop ring (40).

[0022] Installing it in this way guides the installation of the stop ring (40) through the first guide surface (221). The direction of inclination of the side of the stop ring (40) near the spiral guide groove (30) before it enters the spiral guide groove (30) is made to be the same as the spiral direction, thereby making it easy for the stop ring (40) to enter the spiral guide groove (30). This prevents a situation in which, in the prior art, the angle between the axis of the side of the stop ring (40) near the spiral guide groove (30) and the spiral direction of the spiral guide groove (30) is too large, causing the stop ring (40) and the spiral guide groove (30) to collide and friction when the stop ring (40) enters the spiral guide groove (30), thereby preventing damage to the stop ring (40) or the spiral guide groove (30). This ensures the reliability and mounting accuracy of the stop ring (40).

[0023] Specifically, the position limiting structure (20) further comprises a bottom surface (23). The bottom surface (23) is located on one side of the nut body (10) where the spiral guide groove (30) is provided. Both ends of the bottom surface (23) are connected to the stop surface (21) and the first guide surface (221), respectively. Specifically, the bottom surface (23) extends along the radial direction of the nut body (10).

[0024] As illustrated in FIGS. 3 and 4, the bottom surface (23) is installed perpendicular to the axis of the nut body (10). On a projection plane perpendicular to the first guide surface (221) and the bottom surface (23), the connection point between the first guide surface (221) and the bottom surface (23) is point A. The angle of the tangent passing through point A of the bottom surface (23) and the first guide surface (221) is q, and 90° ≤ q ≤ 180°. This installation facilitates the assembly of the stop ring (40). Specifically, the mating surface (22) is located within the area formed by the tangent and the bottom surface. If q < 90° or q > 180°, the extension direction of the mating surface (22) and the spiral direction of the spiral guide groove (30) are opposite, making it impossible to assemble the stop ring (40). If q is limited to between 90° and 180°, it can be ensured that the extension direction of the fitting surface (22) and the spiral direction of the spiral guide groove (30) are the same. Therefore, it is easy to assemble the stop ring (40) into the spiral guide groove (30) along the extension direction of the fitting surface (22), and the mounting reliability of the stop ring (40) is ensured.

[0025] Specifically, in the direction perpendicular to the tangent, the maximum width of the position limiting structure (20) is d, and 0.5 mm ≤ d ≤ 1 mm. In this embodiment, the stop ring (40) includes a helical member and a bending hook connected to each other. By limiting the maximum width (d), a situation is prevented where d is too large so that the position limiting structure (20) is not accommodated within the helical pitch area of ​​the helical member, or where the helical pitch of the helical member is expanded and even expanded and damaged. It is also prevented where d is too small so that the guidance function for mounting the stop ring (40) of the position limiting structure (20) is not significant. This embodiment facilitates installation guidance for the stop ring (40) by limiting the upper and lower limits of d. This ensures the reliability of mounting the stop ring (40).

[0026] Additionally, the spiral guide groove (30) extends along a predetermined spiral. On a projection plane perpendicular to the stop surface (21) and parallel to the axis of the nut body (10), the stop surface (21) and the spiral form a narrow angle C, and 60°≤C≤100°.

[0027] In this embodiment, C is limited. That is, the rotation that the position limiting structure (20) generates with respect to the spiral is limited. If C > 100°, the spiral direction of the stop surface (21) and the spiral guide groove becomes the same and even parallel, so that the stop ring (40) can deviate from the spiral guide groove (30) from the position limiting structure (20) along the stop surface (21). If C < 60°, one side of the stop surface (21) that is close to the spiral guide groove (30) rotates, and an acute angle can be formed between it and the spiral guide groove (30). In this case, the stop surface (21) cannot perform the stop function. The top surface (24) can rotate to the position where the stop surface (21) is located due to the rotation of the position limiting structure (20). In addition, the extension direction of the top surface (24) and the spiral direction of the spiral guide groove are identical or even parallel, and the stop ring (40) can deviate from the spiral guide groove (30) from the position limiting structure (20) along the top surface (24). This embodiment effectively prevents the stop ring (40) from deviating from within the spiral guide groove (30) during the process of stopping in the position limiting structure (20) by limiting the range of the two endpoints of C. This ensures the reliability of the stop ring (40) stop in the position limiting structure (20).

[0028] As illustrated in FIG. 3, the position limiting structure (20) further comprises a top surface (24) installed to face the bottom surface (23). The fitting surface (22) further includes a second guide surface (222) connected to the first guide surface (221). Both ends of the top surface (24) are connected to the stop surface (21) and the second guide surface (222), respectively.

[0029] In this embodiment, the second guide surface (222) is installed to extend along the axial direction of the nut body (10). The second guide surface (222) functions to assist in guiding the installation of the stop ring (40). At the same time, by installing the second guide surface (222), the structural strength of one side of the first guide surface (221) of the position limiting structure (20) is reinforced, and the reliability of the position limiting structure (20) is ensured.

[0030] Specifically, the top surface (24) is installed at an angle with respect to the radial direction of the nut body (10). The inclination direction of the top surface (24) is the same as the spiral direction of the spiral guide groove (30). By guiding the installation of the stop ring (40) through the top surface (24) in this way, a situation is prevented where the stop ring (40) is expanded and damaged due to the angle formed between the top surface (24) and the fitting surface (22) being too large. This ensures the reliability of the mounting of the stop ring (40).

[0031] As illustrated in FIGS. 3 and 4, the bottom surface (23) is installed parallel to the radial direction of the nut body (10). The top surface (24) and the bottom surface (23) form a narrow angle α, where 5° ≤ α ≤ 15°. This installation prevents a situation where the angle α is relatively small, causing the stop ring (40) to only come into contact with the connection point between the top surface (24) and the stop surface (21), thereby preventing the top surface (24) from performing a guiding function. Alternatively, it prevents a situation where the angle α is relatively large, causing the stop ring (40) to only come into contact with the connection point between the top surface (24) and the fitting surface (22), thereby preventing the top surface (24) from performing a guiding function. This ensures reliability in the mounting guidance of the stop ring (40) on the top surface (24).

[0032] Specifically, the first guide surface (221) includes a first arc-shaped section (2211), a straight section (2212), and a second arc-shaped section (2213) connected in sequence. The first arc-shaped section (2211) is connected to the second guide surface (222), and the second arc-shaped section (2213) is connected to the bottom surface (23). The straight section (2212) and the bottom surface (23) form a narrow angle β, where 10° ≤ β ≤ 50°. Through this installation, a situation is prevented where the angle β becomes too small or too large, causing the angle between the extension direction of the straight section (2212) and the spiral direction of the spiral guide groove (30) to become too large. This ensures that the stop ring (40) can smoothly enter the spiral guide groove (30) by the guidance of the straight section (2212). Thus, the reliability of the stop ring (40) mounting is ensured.

[0033] As illustrated in FIGS. 5 to 8, the stop ring (40) includes a spiral member (41). The spiral member (41) has a spiral structure. The spiral member (41) is installed so as to be rotatable within a spiral guide groove (30). The number of spiral turns of the spiral member (41) is n, and n≥2. This embodiment limits the number of spiral turns (n) of the spiral member (41). This prevents a situation in the conventional technology where, during the process of the stop ring (40) rotating along the axial direction of the spiral guide groove (30), the number of spiral turns of the spiral member (41) is too small, causing the contact area between the spiral member (41) and the spiral guide groove (30) to become small, particularly when the stop ring (40) moves to both ends of the spiral guide groove (30), some of the spiral member (41) is located inside the spiral guide groove (30) and other parts are located outside the spiral guide groove (30), thereby further reducing the contact area between the spiral member (41) and the spiral guide groove (30) and causing the spiral member (41) to easily detach from the spiral guide groove (30). This ensures the reliability of the movement of the stop ring (40) on the spiral guide groove (30) and further ensures the reliability of the nut structure.

[0034] As shown in FIG. 6, the cross-sectional diameter of the spiral member (41) is e, and 0.8 mm ≤ e ≤ 1.0 mm. By limiting the diameter (e) of the spiral member (41) in this way, the contact area between the spiral member (41) and the spiral guide groove (30) is made relatively large. If e > 1.0 mm, most of the spiral member (41) is located outside the spiral guide groove (30), and the area of ​​the spiral member (41) itself located inside the spiral guide groove (30) is reduced. Therefore, it is prone to falling out during movement. If e < 0.8 mm, most or all of the spiral member (41) is located inside the spiral guide groove (30), and during the process of the spiral member (41) moving within the spiral guide groove (30), random movement occurs along the arc-shaped surface of the spiral guide groove (30). As a result, a situation occurs where the spiral member (41) detaches from the spiral guide groove (30). Therefore, by limiting the above parameters, the reliability of movement on the spiral guide groove (30) of the stop ring (40) can be guaranteed, and the reliability of the nut structure can be guaranteed.

[0035] As illustrated in FIG. 7, the spiral pitch of the spiral member (41) is L, and 1.3 mm ≤ L ≤ 1.5 mm. Through this installation, the spiral member (41) and the spiral guide groove (30) are extruded, preventing a situation in which the spiral member (41) or the spiral guide groove is damaged. Specifically, if the spiral pitch (L) of the spiral member (41) is too small, during the process of assembling the spiral member (41) into the spiral guide groove (30), the spiral member (41) is restricted by the distance between two adjacent wheels of the spiral guide groove (30), and thus the spiral member (41) receives tension directed outward along the axial direction of the nut body (10). Consequently, the spiral member (41) is expanded and damaged. If the helical pitch (L) of the helical member (41) is too large, during the process of assembling the helical member (41) into the helical guide groove (30), the helical member (41) is restricted by the distance between two adjacent wheels of the helical guide groove (30), and thus receives a contraction force directed inward along the axial direction of the nut body (10). Consequently, the helical member (41) is extruded and damaged.

[0036] Specifically, the spiral guide groove (30) is a spiral concave groove located on the outer surface of the nut body (10). In this way, the spiral guide groove (30) is installed directly on the outer surface of the nut body (10). This prevents the problem of complex assembly of the nut body, stop ring, and position limiting spring in the prior art. This simplifies the mounting process by eliminating the need to re-mount the position limiting spring. Therefore, it is easy to implement automated mounting of the stop ring (40) and the nut body (10), and the production efficiency of the nut structure is further improved.

[0037] Optionally, the technical solution is also applied to a nut structure with a position limiting spring in the prior art. In this case, the spiral guide groove is a spiral region formed between the position limiting spring installed to cover the outer surface of the nut body and the outer surface of the nut body.

[0038] As illustrated in FIGS. 1 to 8, the nut structure includes a position limiting structure (20) installed on the nut body (10). One end of the stop ring (40) is fitted to stop with the position limiting structure (20). In this way, the movement of the stop ring (40) in one direction along the axial direction of the nut body (10) is restricted through the position limiting structure (20). This prevents the stop ring (40) from completely disengaging from the spiral guide groove (30), thereby ensuring the reliability of the nut structure.

[0039] Specifically, the nut structure further includes a fitting plate (70). The fitting plate (70) is installed to cover the nut body (10). A spiral guide groove (30) is located on one side facing the fitting plate (70) of the position limiting structure (20). In this way, the connection between the nut body (10) and the valve assembly (50) is implemented through the fitting plate (70), thereby ensuring connection reliability.

[0040] As illustrated in FIGS. 6 and 8, the nut structure further includes a second position limiting structure (60) installed on the nut body (10). The other end of the stop ring (40) is fitted to stop with the second position limiting structure (60). In this way, the movement of the stop ring (40) in the other direction along the axial direction of the nut body (10) is restricted through the second position limiting structure (60). This prevents the stop ring (40) from completely disengaging from the spiral guide groove (30), thereby ensuring the reliability of the nut structure.

[0041] Specifically, the spiral guide groove (30) is located between the position limiting structure (20) and the second position limiting structure (60). As illustrated in FIG. 6, the position limiting structure (20) limits the upward movement of the stop ring (40) along the axis of the nut body (10). The second position limiting structure (60) limits the downward movement of the stop ring (40) along the axis of the nut body (10). The number of spiral member (41) turns of the stop ring (40) is designed to be at least two turns. When the position limiting structure (20) performs an upper stop position limit for the stop ring (40), it can ensure that at least one full turn of the spiral member is on the spiral guide groove (30). This prevents a situation where, when the stop ring (40) and the position limiting structure (20) are stopped, a small portion of the spiral member (41) is positioned within the spiral guide groove (30) or all of the spiral member (41) is displaced from the spiral guide groove (30), thereby preventing the stop ring (40) from displaced from the spiral guide groove (30).

[0042] As illustrated in FIGS. 7 and 8, the stop ring (40) further includes a bending hook (42). The bending hook (42) is connected to one end of the spiral member (41). Here, the bending hook (42) is fitted to stop with the second position limiting structure (60). The other end of the spiral member (41) is fitted to stop with the position limiting structure (20). By fitting the bending hook (42) to stop with the second position limiting structure (60) in this way, it is ensured that relatively little powder is generated or not generated during the process of the bottom of the spiral member (41) and the second position limiting structure (60) colliding with the stop. Additionally, it prevents powder from entering the spiral guide groove (30) due to the stop collision and blocking the movement of the spiral member (41) within the spiral guide groove (30), thereby ensuring the performance of the nut structure.

[0043] Optionally, the cross-sectional diameter of the spiral member (41) is the same as the cross-sectional diameter of the bending hook (42). The bending hook (42) extends outward from the outer surface of the nut body (10) along the radial direction of the nut body (10).

[0044] Specifically, the nut body (10), the position limiting structure (20), and the second position limiting structure (60) are an integral structure. This installation facilitates the integral molding of the position limiting structure (20), the second position limiting structure (60), and the nut body (10). This lowers processing costs and improves the production efficiency of the nut structure.

[0045] Optionally, the position limiting structure (20) and the second position limiting structure (60) are both position limiting bumps installed to protrude from the outer surface of the nut body (10).

[0046] As illustrated in FIG. 9, another embodiment of the present application provides an electric valve. The electric valve comprises a valve body assembly (50) and a nut structure. The nut structure is located within the valve body assembly (50).

[0047] In this embodiment, the stop ring (40) within the nut structure can function as a guide for mounting the stop ring (40) by the fitting surface (22) during the process of assembling it to the nut body (10). Specifically, the stop ring (40) has one end near the spiral guide groove (30) that enters the spiral guide groove (30) along the extension direction of the fitting surface (22). Thus, the installation accuracy and installation efficiency of the stop ring (40) are improved. After the assembly of the stop ring (40) is completed, the end near the position limiting structure (20) of the stop ring (40) is fitted to stop with the stop surface (21). This limits the range of movement of the stop ring (40) on the spiral guide groove (30) and prevents the stop ring (40) from coming out of the spiral guide groove (30) during the movement process. This ensures the reliability of the nut structure and further guarantees the reliability of the electric valve.

[0048] In addition, in this embodiment, the number of spiral turns (n) of the spiral member (41) of the nut structure of the electric valve is limited. This prevents a situation in which the spiral member (41) is prone to detaching from the spiral guide groove (30). This ensures the reliability of movement of the stop ring (40) on the spiral guide groove (30), ensures the reliability of the nut structure, and further ensures the reliability of the electric valve.

[0049] The foregoing is merely a preferred embodiment of the present application and does not limit the application. Those skilled in the art to which this application pertains may make various modifications and changes to the present application. All modifications, equivalent substitutions, improvements, etc., made within the scope of the spirit and principles of the present application shall be included within the scope of protection of the present application. Explanation of the symbols

[0050] The attached drawings include the following reference numerals. 10-Nut body; 20-Position limiting structure, 21-Stop surface, 22-Matching surface, 221-First guide surface, 2211-First arc section, 2212-Straight section, 2213-Second arc section, 222-Second guide surface, 23-Bottom surface, 24-Top surface; 30-Spiral Guide Home; 40-Stop ring, 41-Spiral member, 42-Bending hook; 50-Valve body assembly; 60-2nd position limiting structure; 70-Custom Plate.

Claims

Claim 1 In a nut structure, the nut body (10), a position limiting structure (20), a spiral guide groove (30), and a stop ring (40) are included. The position limiting structure (20) is installed to protrude from the outer surface of the nut body (10), and the position limiting structure (20) has a stop surface (21) and a matching surface (22). The spiral guide groove (30) is installed on the outer surface of the nut body (10), and the spiral guide groove (30) is located on one side of the position limiting structure (20) where the matching surface (22) is provided. One end of the spiral guide groove (30) is started from the matching surface (22) or from the extension direction of the matching surface (22). The stop ring (40) is installed to be rotatable within the spiral guide groove (30), and the stop ring (40) is matched to stop with the stop surface (21). The matching surface (22) is a first A nut structure comprising a guide surface (221), wherein the first guide surface (221) is installed obliquely with respect to the radial direction of the nut body (10), and the inclination direction of the first guide surface (221) is the same as the spiral direction of the spiral guide groove (30) to guide the stop ring (40) when mounting the stop ring (40), and the position limiting structure (20) further comprises a top surface (24), and the fitting surface (22) further comprises a second guide surface (222) connected to the first guide surface (221), and both ends of the top surface (24) are connected to the stop surface (21) and the second guide surface (222), respectively. Claim 2 delete Claim 3 A nut structure according to claim 1, wherein the position limiting structure (20) further comprises a bottom surface (23) installed opposite to the top surface (24), wherein the bottom surface (23) is located on one side of the nut body (10) where the spiral guide groove (30) is provided, and the two ends of the bottom surface (23) are connected to the stop surface (21) and the first guide surface (221), respectively. Claim 4 A nut structure according to claim 3, wherein the bottom surface (23) is installed perpendicular to the axis of the nut body (10), and on a projection plane perpendicular to the first guide surface (221) and the bottom surface (23), the connection position between the first guide surface (221) and the bottom surface (23) is point A, the angle of the tangent passing through point A of the bottom surface (23) and the first guide surface (221) is q, and 90° ≤ q ≤ 180°. Claim 5 A nut structure according to claim 4, characterized in that, in a direction perpendicular to the tangent, the maximum width of the position limiting structure (20) is d and 0.5mm≤d≤1mm. Claim 6 A nut structure according to claim 3, wherein the spiral guide groove (30) extends along a predetermined spiral, and on a projection plane perpendicular to the stop surface (21) and parallel to the axis of the nut body (10), the stop surface (21) and the spiral form a narrow angle C, and 60° ≤ C ≤ 100°. Claim 7 delete Claim 8 A nut structure according to claim 3, wherein the top surface (24) is installed obliquely with respect to the radial direction of the nut body (10), and the inclination direction of the top surface (24) is the same as the spiral direction of the spiral guide groove (30). Claim 9 A nut structure according to claim 8, wherein the bottom surface (23) is installed parallel to the radial direction of the nut body (10), and the top surface (24) and the bottom surface (23) form a narrow angle α, and 5° ≤ α ≤ 15°. Claim 10 A nut structure according to claim 8, wherein the first guide surface (221) includes a first arc-shaped section (2211), a straight section (2212), and a second arc-shaped section (2213) connected in sequence, the first arc-shaped section (2211) is connected to the second guide surface (222), the second arc-shaped section (2213) is connected to the bottom surface (23), and the straight section (2212) and the bottom surface (23) form a narrow angle β, and 10° ≤ β ≤ 50°. Claim 11 A nut structure according to claim 1, wherein the stop ring (40) includes a spiral member (41), the spiral member (41) has a spiral structure, the spiral member (41) is installed to be rotatable within the spiral guide groove (30), and the number of spiral turns of the spiral member (41) is n, and n≥2. Claim 12 A nut structure according to claim 11, characterized in that the cross-sectional diameter of the spiral member (41) is e and 0.8 mm ≤ e ≤ 1.0 mm. Claim 13 A nut structure according to claim 11, characterized in that the spiral pitch of the spiral member (41) is L and 1.3mm ≤ L ≤ 1.5mm. Claim 14 A nut structure according to claim 11, wherein the nut structure further comprises a fitting plate (70), the fitting plate (70) is installed to cover the nut body (10), and the spiral guide groove (30) is located on one side facing the fitting plate (70) of the position limiting structure (20). Claim 15 A nut structure according to claim 11, wherein the nut structure further comprises a second position limiting structure (60) installed on the nut body (10), and one end of the stop ring (40) is fitted to stop with the position limiting structure (20), and the other end of the stop ring (40) is fitted to stop with the second position limiting structure (60). Claim 16 A nut structure characterized in that, in item 15, the stop ring (40) further comprises a bending hook (42), the bending hook (42) is connected to one end of the spiral member (41), the bending hook (42) is fitted to stop with the second position limiting structure (60), and the other end of the spiral member (41) is fitted to stop with the position limiting structure (20). Claim 17 A nut structure according to claim 15, characterized in that the nut body (10), the position limiting structure (20), and the second position limiting structure (60) are an integral structure. Claim 18 An electric valve, wherein the electric valve comprises a valve body assembly (50) and a nut structure according to any one of claims 1, 3 to 6 and 8 to 17, and wherein the nut structure is located within the valve body assembly (50).

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