Electric valve locking and limiting mechanism and electric valve assembly

Abstract

The utility model provides an electrically operated valve locking and limiting mechanism and an electrically operated valve assembly, and relates to the field of electrically operated valves.The electrically operated valve locking and limiting mechanism comprises a driving nut and a locking spring ring, the locking spring ring is installed on the driving nut, and the locking spring ring and the driving nut are relatively fixed in the axial direction and the circumferential direction of the driving nut; and a part of the stop spring ring protrudes out of the bottom end of the driving nut in the axial direction of the driving nut. The stop spring ring is matched with the limiting disc to limit the descending position of the valve needle, the stop spring ring and the limiting disc elastically collide, and noise is low.

Description

Technical Field

[0001] The utility model relates to the field of electric valves, in particular to an electric valve stop and limit mechanism and an electric valve assembly. Background Art

[0002] The electric valve controls the flow of refrigerant through the movement of the valve needle. The electric valve mainly includes a rotor assembly, a transmission mechanism, and a valve needle. The rotor assembly is connected to the transmission mechanism, and the transmission mechanism is connected to the valve needle. When the rotor assembly rotates under the action of magnetic force, it can transmit torque to the valve needle through the transmission mechanism, thereby driving the valve needle to rise and fall, and then adjusting the flow of the valve and regulating the opening and closing of the valve by the position of the valve needle. In order to control the descending position of the valve needle, the drive nut and the limit plate of the transmission mechanism are generally matched. The drive nut and the limit plate are both provided with a limit protrusion. When the drive nut and the valve needle descend together, the limit protrusion on the drive nut rotates and can abut against the limit protrusion on the limit plate, thereby limiting the further rotation of the drive nut and the descent of the valve needle.

[0003] The inventors discovered during their research that the stop and limit mechanism of the conventional electric valve has at least the following disadvantages:

[0004] The lowering position of the valve needle is achieved by the collision of two limit protrusions. The two limit protrusions are rigid collisions, which cause large vibrations and noise. Utility Model Content

[0005] The purpose of the utility model is to provide an electric valve stop and limit mechanism and an electric valve assembly, which can reduce abnormal noise during the operation of the electric valve.

[0006] In a first aspect, the utility model provides an electric valve stop and limit mechanism, comprising:

[0007] A drive nut and a stop spring ring, wherein the stop spring ring is mounted on the drive nut, and the stop spring ring and the drive nut are relatively fixed in the axial and circumferential directions of the drive nut, and a portion of the stop spring ring protrudes from the bottom end of the drive nut in the axial direction of the drive nut.

[0008] In an optional embodiment, one end of the retaining spring ring protrudes from the bottom end of the drive nut in the axial direction of the drive nut.

[0009] In an optional embodiment, the retaining spring ring is sleeved on the outer peripheral surface of the drive nut.

[0010] In an optional embodiment, an assembly groove is provided on the outer peripheral surface of the drive nut, and the assembly groove includes a first groove section and a second groove section that are connected, the first groove section extends in the circumferential direction of the drive nut, and the second groove section extends in the axial direction of the drive nut and extends to the bottom end; the retaining spring ring is clamped in the first groove section and the second groove section, and one end of the retaining spring ring extends out of the second groove section.

[0011] In an optional embodiment, the retaining spring ring includes a connected arcuate rod segment and a straight rod segment, the arcuate rod segment is clamped in the first slot segment, the straight rod segment is clamped in the second slot segment, and the end of the straight rod segment extends out of the second slot segment to one end of the bottom end.

[0012] In an optional embodiment, the outer diameter of the straight rod segment is greater than the outer diameter of the arc-shaped rod segment.

[0013] In an optional embodiment, the arc-shaped rod segment and the straight rod segment are smoothly transitioned through a tapered rod segment.

[0014] In an optional embodiment, the drive nut includes an inner sleeve and an outer protective sleeve, the outer protective sleeve is sleeved on the outside of the inner sleeve, and a threaded groove is provided on the inner circumferential wall surface of the inner sleeve; the retaining spring ring is installed on the outer protective sleeve.

[0015] In an optional embodiment, the inner sleeve and the outer protective sleeve are injection-molded into an integral structure.

[0016] In a second aspect, the utility model provides an electric valve assembly, the electric valve assembly comprising:

[0017] The electric valve stopping and limiting mechanism according to any one of the aforementioned embodiments.

[0018] The beneficial effects of the embodiments of the present invention include, for example:

[0019] In summary, the electric valve stop and limit mechanism provided in this embodiment utilizes a stop spring coil mounted on a drive nut. The stop spring coil and the drive nut are relatively fixed, with a portion of the stop spring coil extending beyond the bottom end of the drive nut, and the bottom end of the drive nut corresponding to the position of the limit plate. When the drive nut rotates, driving the valve needle downward, the drive nut drives the stop spring coil to rotate along with it. When the stop spring coil rotates until its portion protruding from the drive nut contacts a protrusion on the limit plate, the drive nut cannot rotate further, and the valve needle cannot descend, thereby controlling the position of the valve needle's descent. Because the stop spring coil has a certain degree of elasticity, when the stop spring coil contacts the protrusion on the limit plate, the two collide elastically. This produces less vibration and noise than the rigid collision mechanism of the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0021] Figure 1 A schematic structural diagram of a stop and limit mechanism for an electric valve provided in an embodiment of the present utility model;

[0022] Figure 2 A schematic structural diagram of a drive nut provided in an embodiment of the present utility model;

[0023] Figure 3 A schematic structural diagram of a retaining spring ring provided in an embodiment of the present utility model;

[0024] Figure 4 A schematic diagram of a portion of the structure of an electric valve assembly provided in an embodiment of the present utility model;

[0025] Figure 5 This is a schematic cross-sectional structural diagram of an electric valve assembly provided in an embodiment of the present utility model.

[0026] Reference numerals:

[0027] 100-drive nut; 110-inner sleeve; 120-outer protective sleeve; 121-assembly groove; 122-first groove section; 123-second groove section; 200-stop spring ring; 210-arc-shaped rod section; 220-tapered rod section; 230-straight rod section; 001-protective shell; 002-magnetic rotor unit; 003-valve body; 004-valve seat; 005-valve core; 006-valve needle; 007-limiting plate; 071-protrusion; 008-guide bushing. DETAILED DESCRIPTION

[0028] The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0029] The components of the embodiments of the present invention generally described and shown in the drawings herein may be arranged and designed in a variety of different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but rather merely represents selected embodiments of the present invention.

[0030] Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative work shall fall within the scope of protection of the present invention.

[0031] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating positions or relationships, are based on the positions or relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0032] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0033] Refer to the following Figures 1 to 5 An electric valve stopping and limiting mechanism and an electric valve assembly including the electric valve stopping and limiting mechanism according to some embodiments of the present invention are described.

[0034] Please combine Figure 1 ,- Figure 4 In this embodiment, the electric valve stop and limit mechanism includes a drive nut 100 and a stop spring ring 200. The stop spring ring 200 is installed on the drive nut 100. The stop spring ring 200 and the drive nut 100 are relatively fixed in the axial and circumferential directions of the drive nut 100, and a portion of the stop spring ring 200 protrudes from the bottom end of the drive nut 100 in the axial direction of the drive nut 100.

[0035] Based on the above, the working mode of the electric valve stop limit mechanism provided in this embodiment is as follows:

[0036] The drive nut 100 is connected to the magnetic rotor mechanism. When the magnetic rotor mechanism is energized, it drives the drive nut 100 to rotate. As the drive nut 100 rotates, it can also drive the valve needle 006 up and down. As the valve needle 006 rises and falls, it can control the opening and closing of the channel on the valve core 005 and the flow rate. Generally speaking, when the valve needle 006 descends, the valve needle 006 moves in the direction of closing the channel. To control the position of the valve needle 006 as it descends, the drive nut 100 descends along with the valve needle 006 during rotation. The stop spring ring 200 engages with the protrusion 071 on the limit plate 007 below the drive nut 100. The stop spring ring 200 abuts against the protrusion 071 on the limit plate 007, limiting the drive nut 100 from further rotation, thereby controlling the position of the valve needle 006.

[0037] It should be understood that by installing the retaining spring ring 200 on the drive nut 100, the retaining spring ring 200 and the drive nut 100 are relatively fixed. A portion of the retaining spring ring 200 extends beyond the bottom end of the drive nut 100, and the bottom end of the drive nut 100 corresponds to the position of the stop plate 007. When the drive nut 100 rotates to drive the valve needle 006 downward, the drive nut 100 drives the retaining spring ring 200 to rotate together. When the retaining spring ring 200 rotates until its portion protruding from the drive nut 100 abuts against the protrusion 071 on the stop plate 007, the drive nut 100 cannot rotate further, and the valve needle 006 cannot descend, thereby controlling the position of the valve needle 006. Because the retaining spring ring 200 has a certain degree of elasticity, when the retaining spring ring 200 abuts the protrusion 071 on the stop plate 007, the retaining spring ring 200 and the protrusion 071 on the stop plate 007 collide elastically. Compared with the rigid collision method of the prior art, the retaining spring ring 200 and the protrusion 071 collide elastically, resulting in less vibration and noise.

[0038] The following embodiments illustrate the detailed structure of the electric valve stop and limit mechanism provided in this application by way of examples.

[0039] Please combine Figure 1 and Figure 2 In this embodiment, the drive nut 100 optionally includes an inner sleeve 110 and an outer protective sleeve 120. The outer protective sleeve 120 is sleeved onto the outer surface of the inner sleeve 110, and a threaded groove is provided on the inner circumferential wall surface of the inner sleeve 110. The retaining spring ring 200 is mounted on the outer protective sleeve 120. For ease of manufacturing, the inner sleeve 110 and the outer protective sleeve 120 are integrally formed by injection molding. That is, the outer protective sleeve 120 can be configured as a plastic sleeve and directly injection-molded onto the outer surface of the inner sleeve 110.

[0040] It should be understood that in order to improve the firmness of the combination between the inner sleeve 110 and the outer protective sleeve 120, a concave-convex structure can be set between the inner sleeve 110 and the outer protective sleeve 120, and the concave-convex structure can be used to achieve bite, so that the inner sleeve 110 and the outer protective sleeve 120 are firmly combined and not easy to loosen.

[0041] Please combine Figure 2 Optionally, the retaining spring ring 200 is mounted on the outer circumferential surface of the outer protective sleeve 120. Since the outer protective sleeve 120 is supported by plastic, further processing is facilitated to form a groove for mounting and positioning the retaining spring ring 200. Specifically, an assembly groove 121 is provided on the outer circumferential surface of the outer protective sleeve 120. The assembly groove 121 includes a first groove section 122 and a second groove section 123 that are connected. The first groove section 122 extends in the circumferential direction of the drive nut 100, and the second groove section 123 extends in the axial direction of the drive nut 100 and extends to the bottom end. The retaining spring ring 200 is clamped in the first groove section 122 and the second groove section 123, and one end of the retaining spring ring 200 extends out of the second groove section 123.

[0042] The positioning of the stop spring ring 200 is achieved through the assembly groove 121, which facilitates the installation of the stop spring ring 200, and the stop spring ring 200 is clamped in the assembly groove 121. The stop spring ring 200 and the assembly groove 121 are tightly combined, and the two are not easy to move relative to each other. The stopping spring ring 200 has a good limiting effect when in contact with the limit plate 007.

[0043] Please combine Figure 1 and Figure 3 It should be understood that in order to facilitate the mating of the retaining spring ring 200 with the outer protective sleeve 120 and improve their mating accuracy, the retaining spring ring 200 is configured to match the assembly groove 121. For example, the retaining spring ring 200 includes a connected curved rod segment 210 and a straight rod segment 230. The curved rod segment 210 is engaged with the first groove segment 122, and the straight rod segment 230 is engaged with the second groove segment 123. The end of the straight rod segment 230 extends beyond the end of the second groove segment 123 that extends to the bottom. Furthermore, both the curved rod segment 210 and the straight rod segment 230 can be cylindrical, with the outer diameter of the curved rod segment 210 being smaller than that of the straight rod segment 230. The tapered rod segment 220 allows for a smooth transition between the two. Due to the larger outer diameter of the straight rod segment 230, the straight rod segment 230 is stronger and less susceptible to deformation and damage when in contact with the protrusion 071 on the limit plate 007, resulting in a good retaining effect and a long service life.

[0044] It should be noted that, by extending one end of the retaining spring ring 200 out of the second slot section 123 along the axial direction of the driving nut 100 , the assembly of the retaining spring ring 200 and the driving nut 100 is facilitated.

[0045] It should be understood that in other embodiments, other parts of the retaining spring ring 200 may protrude from the bottom end of the drive nut 100 and be able to contact the protrusion 071 on the limit plate 007.

[0046] The electric valve stop and limit mechanism provided in this embodiment realizes limitation by the contact between the stop spring ring 200 and the protrusion 071 on the limit plate 007. The stop spring ring 200 has a certain elasticity. When the stop spring ring 200 abuts against the protrusion 071 on the limit plate 007, the stop spring ring 200 and the protrusion 071 are elastic collisions. Compared with the rigid collision of the prior art, the vibration and noise are small.

[0047] This embodiment also provides an electric valve assembly, which includes the above-mentioned electric valve stopping and limiting mechanism. Since the electric valve assembly includes the electric valve stopping and limiting mechanism, it has all the beneficial effects of the electric valve stopping and limiting mechanism, which will not be described in detail here.

[0048] It should be understood that the detailed structure of the electric valve assembly can refer to the existing public technology (such as the published patent CN220060542U previously applied for by the applicant). In this embodiment, in order to avoid repetitive descriptions, the composition structure of the electric valve assembly is not elaborated in detail. For ease of understanding, the important components of the electric valve assembly are introduced and explained.

[0049] Please combine Figure 4 and Figure 5 For example, the electric valve assembly also includes a protective shell 001, a magnetic rotor unit 002, a valve body 003, a valve seat 004, a valve core 005, a valve needle 006, a limit plate 007 and a guide bushing 008. The magnetic rotor unit 002 is installed outside the drive nut 100, and the two are fixedly matched. When the magnetic rotor unit 002 is energized, it rotates, driving the drive nut 100 to rotate together. The protective shell 001 is provided outside the magnetic rotor unit 002 and is fixedly connected to the valve seat 004. The valve seat 004 is fixed on the valve body 003 and presses the valve core 005 onto the valve body 003. Two interfaces are provided on the valve body 003, and a channel is provided on the valve core 005, with the two ends of the channel connected to the two interfaces respectively. The limit plate 007 is sleeved on the outside of the guide bushing 008, which is fixed to the valve seat 004. The limit plate 007 is welded to the valve seat 004, and the top of the limit plate 007 has a protrusion 071 that cooperates with the limit protrusion 071. The drive nut 100 is screwed onto the outside of the guide bushing 008. In this way, the valve seat 004, the valve body 003, the limit plate 007 and the guide bushing 008 are all fixed. The valve needle 006 is connected to the drive nut 100, and the valve needle 006 passes through the guide bushing 008 and the valve seat 004 and then extends into the valve core 005. When the drive nut 100 rotates under the drive of the magnetic rotor unit 002, it drives the valve needle 006 to rise and fall. The rise and fall of the valve needle 006 can open or close the channel accordingly, or adjust the flowable area of the channel to achieve flow regulation. Specifically, in this embodiment, in the initial state, the valve needle 006 closes the channel, and the magnetic rotor unit 002 drives the drive nut 100 to rotate, driving the valve needle 006 to rise, thereby opening the channel.

[0050] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. An electric valve stop limit mechanism, characterized in that: include: A drive nut and a stop spring ring, wherein the stop spring ring is mounted on the drive nut, and the stop spring ring and the drive nut are relatively fixed in the axial and circumferential directions of the drive nut, and a portion of the stop spring ring protrudes from the bottom end of the drive nut in the axial direction of the drive nut.

2. The electric valve stop and limit mechanism according to claim 1, characterized in that: One end of the retaining spring ring protrudes from the bottom end of the driving nut in the axial direction of the driving nut.

3. The electric valve stop and limit mechanism according to claim 1, characterized in that: The retaining spring ring is sleeved on the outer peripheral surface of the driving nut.

4. The electric valve stop and limit mechanism according to claim 3, characterized in that: An assembly groove is provided on the outer circumferential surface of the drive nut, and the assembly groove includes a first groove section and a second groove section that are connected. The first groove section extends in the circumferential direction of the drive nut, and the second groove section extends in the axial direction of the drive nut and extends to the bottom end; the retaining spring ring is clamped in the first groove section and the second groove section, and one end of the retaining spring ring extends out of the second groove section.

5. The electric valve stop and limit mechanism according to claim 4, characterized in that: The retaining spring ring includes a connected arc rod section and a straight rod section, the arc rod section is clamped in the first slot section, the straight rod section is clamped in the second slot section, and the end of the straight rod section extends out of the second slot section to one end of the bottom end.

6. The electric valve stop and limit mechanism according to claim 5, characterized in that: The outer diameter of the straight rod segment is greater than the outer diameter of the arc-shaped rod segment.

7. The electric valve stop and limit mechanism according to claim 6, characterized in that: The arc-shaped rod section and the straight rod section are smoothly transitioned through the tapered rod section.

8. The electric valve stop and limit mechanism according to any one of claims 1 to 7, characterized in that: The drive nut includes an inner sleeve and an outer protective sleeve. The outer protective sleeve is sleeved on the outside of the inner sleeve. A threaded groove is provided on the inner circumferential wall surface of the inner sleeve. The retaining spring ring is installed on the outer protective sleeve.

9. The electric valve stop and limit mechanism according to claim 8, characterized in that: The inner sleeve and the outer protective sleeve are injection-molded into an integral structure.

10. An electric valve assembly, characterized in that: The electric valve assembly includes: The electric valve stop and limit mechanism according to any one of claims 1 to 9.

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