Electric valve guide structure and electric valve assembly

Abstract

The utility model provides an electrically operated valve guide structure and an electrically operated valve assembly, and relates to the technical field of electrically operated valves, the electrically operated valve guide structure comprises a guide bushing, a guide nut and a buffer sleeve, and the guide bushing comprises a guide shaft section and a transmission shaft section which are adjacently arranged in the axial direction of the guide bushing; the guide nut is provided with a guide through hole and a transmission through hole which are communicated; the guide shaft section penetrates through the guide through hole and is in sliding fit with the guide through hole; the transmission shaft section is in threaded connection with the transmission through hole; and the buffer sleeve is arranged between the guide bushing and the guide nut. According to the structural design of the electric valve, abnormal sound generated when the guide bush and the guide nut move relatively can be reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of electric valves, in particular to an electric valve guide structure and an electric valve assembly. Background Art

[0002] An electric valve controls the flow of refrigerant through the movement of a valve needle. The electric valve includes a rotor assembly, a transmission mechanism, and a valve needle. The rotor assembly is in transmission connection with the transmission mechanism, which in turn 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 up and down. The position of the valve needle can then be used to adjust the flow rate and the opening and closing of the valve. To improve the stability of the valve needle during the lifting process, the valve needle is generally raised and lowered by a guide structure. That is, a guide nut and a guide bushing are provided inside the electric valve. The guide nut cooperates with the valve needle, which is threadedly connected to the guide bushing. The guide bushing serves as a stationary component, providing guidance and positioning, allowing the guide nut and valve needle to rise and fall relative to the guide bushing.

[0003] The inventors discovered during their research that the guide structure of the prior art electric valve has at least the following disadvantages:

[0004] The guide nut and guide bushing are both metal parts, and they are prone to produce abnormal noise when they move relative to each other, and the electric valve assembly makes a lot of noise during operation. Utility Model Content

[0005] The purpose of the present application is to provide an electric valve guide structure and an electric valve assembly to solve the technical problem in the prior art that abnormal noise is generated due to the relative movement of the guide nut and the guide bushing during the operation of the electric valve assembly.

[0006] In a first aspect, the present invention provides an electric valve guide structure, comprising:

[0007] A guide bushing, a guide nut, and a buffer sleeve, wherein the guide bushing includes a guide shaft segment and a transmission shaft segment adjacently arranged in its axial direction; the guide nut is provided with a communicating guide through hole and a transmission through hole; the guide shaft segment is inserted into the guide through hole and the two are slidably matched, and the transmission shaft segment is threadedly connected to the transmission through hole;

[0008] The buffer sleeve is arranged between the guide shaft segment and the hole wall of the guide through hole.

[0009] In an optional embodiment, the outer circumferential surface of the guide shaft segment is provided with a first annular positioning groove extending around the axis of the guide shaft segment, and the buffer sleeve is arranged in the first annular positioning groove.

[0010] In an optional embodiment, the guide shaft section includes an integral first shaft body and a second shaft body, the first shaft body and the second shaft body are coaxially arranged, and the first shaft body is located on the side of the second shaft body away from the transmission shaft section; the outer diameter of the first shaft body is smaller than the outer diameter of the second shaft body; the first annular positioning groove is arranged on the outer peripheral surface of the first shaft body, and a groove side wall of the first annular positioning groove coincides with the end face of the second shaft body on which the first shaft body is installed.

[0011] In an optional embodiment, a second annular positioning groove coaxial with the guide through hole is provided on the hole wall of the guide through hole, and the buffer sleeve is provided in the second annular positioning groove.

[0012] In an optional embodiment, the buffer sleeve is injection-molded outside the guide shaft segment or the buffer sleeve is injection-molded inside the guide through hole.

[0013] In an optional embodiment, the transmission shaft section includes a main shaft body and a transmission ring, the transmission ring is sleeved outside the main shaft body and the two are integrally formed; the transmission ring is threadedly connected to the transmission through hole.

[0014] In an optional embodiment, a limiting sleeve is injection-molded on the outer side of the guide nut, and a limiting protrusion is convexly provided on one side of the limiting sleeve close to the transmission through hole.

[0015] In an optional embodiment, a concave-convex structure that engages with each other is formed between the outer circumference of the guide nut and the inner circumference of the limiting sleeve.

[0016] In an optional embodiment, the buffer sleeves are multiple in number and are arranged at intervals in the axial direction of the guide shaft segment.

[0017] In a second aspect, the present invention provides an electric valve assembly, comprising the electric valve guide structure described in any one of the aforementioned embodiments.

[0018] Compared with the prior art, the beneficial effects of the present invention are:

[0019] To sum up, the electric valve guide structure provided in this embodiment adjusts the contact between the two metals of the guide bushing and the guide nut to the contact between the metal and the buffer sleeve by arranging a buffer sleeve between the guide shaft section of the guide bushing and the guide through hole of the guide nut. During the relative movement of the guide bushing and the guide nut, the buffer sleeve can absorb the abnormal noise generated by the vibration, thereby reducing the noise during the operation of the electric valve assembly. 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 the electric valve guide structure provided by an embodiment of the utility model;

[0022] Figure 2 A schematic cross-sectional view of the guide structure of an electric valve provided by an embodiment of the present utility model;

[0023] Figure 3 A schematic structural diagram of a guide bushing and a buffer sleeve provided in an embodiment of the present utility model;

[0024] Figure 4 A schematic structural diagram of a guide bushing provided in an embodiment of the present utility model;

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

[0026] Reference numerals:

[0027] 100-guide bushing; 110-guide shaft section; 111-first shaft body; 112-second shaft body; 113-first annular positioning groove; 120-transmission shaft section; 121-main shaft body; 122-transmission ring; 200-guide nut; 210-guide through hole; 220-transmission through hole; 300-buffer sleeve; 400-limit sleeve; 410-limit protrusion; 001-housing; 002-magnetic rotor unit; 003-valve body; 004-valve seat; 005-valve core; 006-valve needle; 007-limiting disk; 071-convex body. 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 4 An electric valve guide structure and an electric valve assembly including the electric valve guide structure according to some embodiments of the present invention are described.

[0034] See Figures 1 to 4 As shown, the present application provides an electric valve guide structure, which includes a guide bushing 100, a guide nut 200 and a buffer sleeve 300. The guide bushing 100 includes a guide shaft segment 110 and a transmission shaft segment 120 arranged adjacent to each other in its axial direction; the guide nut 200 is provided with a connected guide through hole 210 and a transmission through hole 220; the guide shaft segment 110 is inserted into the guide through hole 210 and the two are slidably matched, and the transmission shaft segment 120 is threadedly connected to the transmission through hole 220; the buffer sleeve 300 is arranged between the guide bushing 100 and the guide nut 200.

[0035] Based on the above, the working principle of the electric valve guide structure provided in this embodiment is as follows:

[0036] By arranging a buffer sleeve 300 between the guide shaft section 110 of the guide bushing 100 and the guide through hole 210 of the guide nut 200, the contact between the two metals of the guide bushing 100 and the guide nut 200 is adjusted to the contact between the metal and the buffer sleeve 300. When the guide bushing 100 and the guide nut 200 are in relative motion, the buffer sleeve 300 can absorb abnormal noise generated by vibration, thereby reducing noise during the operation of the electric valve assembly.

[0037] The following embodiments illustrate the details of the electric valve guide structure provided in this application by way of examples.

[0038] Please combine Figures 1-4 In this embodiment, the electric valve guide structure optionally includes a guide bushing 100, a guide nut 200, and a buffer sleeve 300. The guide bushing 100 includes a guide shaft segment 110 and a transmission shaft segment 120 adjacently arranged in its axial direction. The guide nut 200 is provided with a communicating guide through-hole 210 and a transmission through-hole 220. The guide shaft segment 110 is slidably disposed within the guide through-hole 210, and the transmission shaft segment 120 is threadedly connected to the transmission through-hole 220. The buffer sleeve 300 is mounted on the outside of the guide shaft segment 110.

[0039] With such a design, when the electric valve assembly is operating, the guide bushing 100 does not move as a stationary part, and the guide nut 200 drives the valve needle 006 to rise and fall. During the lifting and lowering process of the guide nut 200, the hole wall of the guide through hole 210 thereon can always be in contact with the buffer sleeve 300 on the guide shaft segment 110, thereby reducing abnormal noise generated during operation.

[0040] In this embodiment, optionally, the outer peripheral surface of the guide shaft segment 110 is provided with a first annular positioning groove 113 extending around the axis of the guide shaft segment 110, and the buffer sleeve 300 is disposed in the first annular positioning groove 113. In this way, after the buffer sleeve 300 is positioned with the guide shaft segment 110, the buffer sleeve 300 is limited in position by the first annular positioning groove 113, and the combination between the buffer sleeve 300 and the guide shaft segment 110 is tighter. The buffer sleeve 300 is not easily displaced in the axial direction of the guide shaft segment 110 relative to the guide shaft segment 110. The buffer sleeve 300 is firmly positioned and not easily dislodged from the guide shaft segment 110, making it safe and reliable to use and having a long service life. In addition, the buffer sleeve 300 is limited in position by the first annular positioning groove 113. When it needs to be replaced, it can be removed from the first annular groove, which is convenient to operate.

[0041] Please combine Figure 3 and Figure 4Furthermore, the guide shaft section 110 includes an integrated first shaft body 111 and a second shaft body 112. The first shaft body 111 and the second shaft body 112 are both cylindrical, and the first shaft body 111 and the second shaft body 112 are coaxially arranged. The first shaft body 111 is located on the side of the second shaft body 112 away from the transmission shaft section 120, that is, the end of the second shaft body 112 away from the first shaft body 111 is integrally arranged with the transmission shaft section 120. The outer diameter of the first shaft body 111 is smaller than the outer diameter of the second shaft body 112. The first annular positioning groove 113 is provided on the outer circumferential surface of the first shaft body 111, and a groove side wall of the first annular positioning groove 113 coincides with the end face of the second shaft body 112 on which the first shaft body 111 is installed. The end of the first shaft body 111 away from the second shaft body 112 is provided with a chamfer, which can be a rounded angle or an oblique angle. During assembly, the buffer sleeve 300 is inserted into the first annular positioning groove 113 from the end of the first shaft body 111, which is convenient for assembly. The buffer sleeve 300 directly contacts the end face of the second shaft body 112, has a large contact area, and has a good limiting effect relying on the end face of the second shaft body 112.

[0042] It should be understood that in other embodiments, the buffer sleeve 300 can be provided in the guide through hole 210 of the guide nut 200, and the buffer sleeve 300 is located between the guide shaft section 110 and the guide through hole 210, which can also play a role in reducing abnormal noise.

[0043] For example, a second annular positioning groove coaxial with the guide through hole 210 is provided on the hole wall of the guide through hole 210, and the buffer sleeve 300 is provided in the second annular positioning groove. The buffer sleeve 300 is limited by the second annular positioning groove, and the position of the buffer sleeve 300 in the guide through hole 210 is stable and reliable.

[0044] It should be understood that the buffer sleeve 300 can be configured as a rubber sleeve, etc. Obviously, the buffer sleeve 300 can also be made of other soft materials.

[0045] In other embodiments, the buffer sleeve 300 can be integrally formed in the guide shaft segment 110 or the guide through hole 210 by injection molding or other methods. The buffer sleeve 300 is more tightly combined with the guide shaft segment 110 and the guide through hole 210, further improving the stability of the buffer sleeve 300 and the guide bushing 100 or the guide nut 200, and improving the safety and reliability of use.

[0046] In addition, there may be multiple buffer sleeves 300 , and the multiple buffer sleeves 300 may be arranged at intervals in the axial direction of the guide shaft segment 110 . The multiple buffer sleeves 300 may be arranged in the guide shaft segment 110 or the guide through hole 210 at the same time.

[0047] In this embodiment, optionally, the transmission shaft section 120 may include a main shaft body 121 and a transmission ring 122, the transmission ring 122 being sleeved on the outside of the main shaft body 121 and the two being formed as one piece; the transmission ring 122 is threadedly connected to the transmission through hole 220. During actual processing, the second shaft body 112 and the main shaft body 121 are docked and formed as one piece, that is, the entire guide bushing 100 is set as an integrated structure. The transmission ring 122 is threadedly connected to the transmission through hole 220, and the position of the main shaft body 121 where the transmission ring 122 is not set is not directly in contact with the transmission through hole 220. In this way, the threaded connection area between the transmission shaft section 120 and the transmission through hole 220 is reduced, the friction loss is reduced, and the relative rotation and sliding of the guide bushing 100 and the guide nut 200 are facilitated.

[0048] In other embodiments, optionally, a limit sleeve 400 is injection-molded on the outer side of the guide nut 200, and a limit protrusion 410 is protruded from one side of the limit sleeve 400 close to the transmission through hole 220. When the guide nut 200 rotates relative to the guide sleeve 100, the limit protrusion 410 can contact and cooperate with the limit structure on the valve seat 004, thereby limiting the rotation range of the guide nut 200, and further limiting the lifting and lowering range of the valve needle 006.

[0049] Furthermore, a concave-convex structure that engages with each other is formed between the outer circumference of the guide nut 200 and the inner circumference of the limiting sleeve 400. For example, an annular groove is provided on the outer circumference of the guide nut 200. After the limiting sleeve 400 is injection-molded onto the guide nut 200, a portion of the limiting sleeve 400 is embedded in the annular groove to form an annular protrusion. The annular protrusion and the annular groove engage with each other, thereby improving the secure fit between the guide nut 200 and the limiting sleeve 400.

[0050] The electric valve guide structure provided in this embodiment can reduce abnormal noise when the guide nut 200 drives the valve needle 006 to rise and fall relative to the guide bushing 100 by arranging a buffer sleeve 300 between the guide shaft section 110 and the guide through hole 210.

[0051] Please combine Figure 5 The present application also provides an electric valve assembly including the electric valve guide structure of the above embodiment. Since the electric valve assembly includes the electric valve guide structure, it has all the beneficial effects of the electric valve guide structure, which will not be described in detail here.

[0052] 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.

[0053] For example, the electric valve assembly also includes a housing 001, a magnetic rotor unit 002, a valve body 003, a valve seat 004, a valve core 005, a valve needle 006, and a limit plate 007. The magnetic rotor unit 002 is mounted on the outside of the guide nut 200, and the two are fixedly matched. When energized, the magnetic rotor unit 002 rotates, driving the guide nut 200 to rotate with it. The housing 001 covers the outside of the magnetic rotor unit 002 and is fixedly connected to the valve seat 004. The valve seat 004 is fixed to the valve body 003 and presses the valve core 005 against the valve body 003. The valve body 003 is provided with two interfaces, and the valve core 005 is provided with a channel, with the two ends of the channel connected to the two interfaces. The limiting plate 007 is sleeved onto the guide bushing 100, which is fixed to the valve seat 004. The limiting plate 007 is welded to the valve seat 004. The top of the limiting plate 007 has a protrusion 071 that mates with the limiting protrusion 410. In this way, the valve seat 004, valve body 003, limiting plate 007, and guide bushing 100 are all fixed. The valve needle 006 is connected to the guide nut 200. The valve needle 006 passes through the guide bushing 100 and valve seat 004 and then extends into the valve core 005. When the guide nut 200 rotates under the drive of the magnetic rotor unit 002, it drives the valve needle 006 up and down. The rise and fall of the valve needle 006 can accordingly open or close the channel, or adjust the flowable area of the channel, thereby achieving 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 guide nut 200 to rotate, driving the valve needle 006 to rise, thereby opening the channel.

[0054] 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 guide structure, characterized in that: include: A guide bushing, a guide nut, and a buffer sleeve, wherein the guide bushing includes a guide shaft segment and a transmission shaft segment adjacently arranged in its axial direction; the guide nut is provided with a communicating guide through hole and a transmission through hole; the guide shaft segment is inserted into the guide through hole and the two are slidably matched, and the transmission shaft segment is threadedly connected to the transmission through hole; The buffer sleeve is arranged between the guide shaft section and the hole wall of the guide through hole.

2. The electric valve guide structure according to claim 1, characterized in that: The outer circumferential surface of the guide shaft segment is provided with a first annular positioning groove extending around the axis of the guide shaft segment, and the buffer sleeve is arranged in the first annular positioning groove.

3. The electric valve guide structure according to claim 2, characterized in that: The guide shaft section includes an integrated first shaft body and a second shaft body, the first shaft body and the second shaft body are coaxially arranged, and the first shaft body is located on the side of the second shaft body away from the transmission shaft section; the outer diameter of the first shaft body is smaller than the outer diameter of the second shaft body; the first annular positioning groove is arranged on the outer peripheral surface of the first shaft body, and a groove side wall of the first annular positioning groove coincides with the end face of the second shaft body on which the first shaft body is installed.

4. The electric valve guide structure according to claim 1, characterized in that: A second annular positioning groove coaxial with the guide through hole is provided on the hole wall of the guide through hole, and the buffer sleeve is arranged in the second annular positioning groove.

5. The electric valve guide structure according to claim 1, characterized in that: The buffer sleeve is injection-molded outside the guide shaft segment or the buffer sleeve is injection-molded inside the guide through hole.

6. The electric valve guide structure according to claim 1, characterized in that: The transmission shaft section includes a main shaft body and a transmission ring. The transmission ring is sleeved on the main shaft body and the two are formed as one piece. The transmission ring is threadedly connected to the transmission through hole.

7. The electric valve guide structure according to claim 1, characterized in that: A limiting sleeve is injection-molded on the outer side of the guide nut, and a limiting protrusion is convexly provided on one side of the limiting sleeve close to the transmission through hole.

8. The electric valve guide structure according to claim 7, characterized in that: A concave-convex structure that engages with each other is formed between the outer circumferential surface of the guide nut and the inner circumferential surface of the limiting sleeve.

9. The electric valve guide structure according to claim 1, characterized in that: There are multiple buffer sleeves, which are arranged at intervals in the axial direction of the guide shaft segment.

10. An electric valve assembly, characterized in that: The electric valve guide structure comprises the electric valve guide structure according to any one of claims 1 to 9.

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