Electric valve plastic nut assembly and electric valve structure
By designing the electric valve drive nut as a split structure with a metal base and a plastic body, the existing electric valve drive nut has solved the problems of high vibration noise, heavy weight and high processing cost, and low noise, low energy consumption and low cost electric valve operation.
Patent Information
- Application Number
- CN202422425808.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-08
- Publication Date
- 2025-08-05
- Estimated Expiration
- 2034-10-08
AI Technical Summary
The drive nuts of existing electric valves are all metal structures, resulting in high vibration noise, high processing costs, heavy weight and high energy consumption.
The electric valve plastic nut assembly with a split structure includes a metal matrix and a plastic body. The two are connected together. The metal matrix provides structural strength, the plastic body reduces weight and noise, and the plastic contacts the guide bushing instead of full metal contact.
It reduces operating noise and energy consumption, reduces weight, reduces processing costs and difficulty, and improves the safety and reliability of the overall structure.
Smart Images
Figure CN223191102U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of electric valves, in particular to an electric valve plastic nut assembly and an electric valve structure. Background Art
[0002] At present, when an electric valve is working, the flow of refrigerant is mainly controlled by the action of the valve needle. The electric valve generally includes a rotor assembly, a transmission mechanism and a valve needle body. The rotor assembly is connected to the transmission mechanism, and the transmission mechanism is connected to the valve needle body. When the rotor assembly rotates under the action of magnetic force, it can transmit torque to the valve needle body through the transmission mechanism, thereby driving the valve needle body to rise and fall, and then adjusting the flow of the valve and the on-off state of the valve by changing the upper and lower positions of the valve needle body. In order to control the descending position of the valve needle body, the drive nut and the guide bushing of the transmission mechanism are generally matched. The drive nut and the guide bushing are screwed together. The guide bushing is fixed as a base component. The drive nut rotates relative to the guide bushing under the drive of the rotor assembly. The drive nut rotates with the valve needle body, and the two rise and fall together. The descending position of the drive nut is limited by the limit plate, thereby controlling the descending limit position of the valve needle body.
[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 existing drive nut is made of metal material. The entire drive nut is a metal structure, which generates vibration between the drive nut and the guide bushing during movement, resulting in high noise. In addition, the drive nut has high processing costs, heavy weight, and high energy consumption during movement. Utility Model Content
[0005] The purpose of the utility model is to provide an electric valve plastic nut assembly and an electric valve structure, which can reduce vibration and noise generated during movement, reduce processing difficulty, reduce processing costs, reduce weight, and reduce energy consumption.
[0006] In a first aspect, the utility model provides an electric valve plastic nut assembly, comprising:
[0007] A metal base and a plastic body, the metal base having a first side and a second side relative to each other, the first side being provided with a positioning groove for positioning the valve needle body positioning sleeve, and the metal base being provided with a first positioning hole for the valve needle body to pass through; the plastic body being provided with a second positioning hole, and a threaded groove for screwing with a guide bushing being provided on part of the hole wall of the second positioning hole, the plastic body being fixedly connected to the metal base and located on the second side, and the first positioning hole and the second positioning hole being communicated.
[0008] In an optional embodiment, the second side of the metal substrate is inserted into the plastic body.
[0009] In an optional embodiment, a first concave-convex portion is provided on the surface of the metal base, a mounting groove is provided on one end surface of the plastic body, a second concave-convex portion is provided on the groove wall of the mounting groove, the second side of the metal base is inserted into the mounting groove, and the first concave-convex portion and the second concave-convex portion are snap-fitted.
[0010] In an optional embodiment, the first convex-concave portion includes an annular groove extending in the circumferential direction of the first positioning hole and a strip groove extending in the axial direction of the first positioning hole, one end of the strip groove extends to the groove side wall of the annular groove close to the first side, and the other end of the strip groove extends to the second side.
[0011] In an optional embodiment, the plastic body is injection molded outside the metal substrate and the first concave-convex portion is wrapped by the plastic body.
[0012] In an optional embodiment, the first side of the metal substrate is configured as a square head.
[0013] In an optional embodiment, a demoulding groove is provided on the outer peripheral surface of the plastic body.
[0014] In an optional embodiment, the demoulding grooves are multiple in number and are arranged at intervals in the circumferential direction of the plastic body.
[0015] In an optional embodiment, a limiting protrusion for abutting and cooperating with a protrusion on the limiting plate is convexly provided on the end surface of the plastic body away from the second side.
[0016] In a second aspect, the present invention provides an electric valve structure, comprising:
[0017] The electric valve plastic nut assembly 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 plastic nut assembly provided in this embodiment is designed to have a split structure by designing the drive nut, that is, the drive nut is divided into a metal base and a plastic body, and the two are connected together. The structural strength of the metal base is high, which can ensure the overall structural strength of the nut assembly and ensure the safety and reliability of use. At the same time, the plastic body is light in weight, which is conducive to the molding of thread grooves, easy to process and manufacture, and low in cost. The weight of the entire nut assembly is lighter than that of an all-metal drive nut, and the energy consumption during rotation is low, which saves energy and reduces operating costs. Since the plastic body of the nut assembly cooperates with the wire bushing, the two are in contact between plastic and metal, which is less vibrating, less noisy, and more stable in operation than two metal contacts. 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 plastic nut assembly for an electric valve provided in an embodiment of the present utility model;
[0022] Figure 2 A schematic structural diagram of a metal substrate provided in an embodiment of the present utility model;
[0023] Figure 3 A schematic structural diagram of a plastic body provided in an embodiment of the present utility model;
[0024] Figure 4 This is a structural schematic diagram of the electric valve structure provided in an embodiment of the utility model.
[0025] Reference numerals:
[0026] 100-metal base; 101-first side; 102-second side; 103-positioning groove; 104-first positioning hole; 110-square head; 120-cylindrical barrel; 130-first concave-convex portion; 131-annular groove; 132-strip groove; 133-positioning protrusion; 200-plastic body; 210-installation groove; 220-demolding groove; 230-limiting boss; 001-housing; 002-rotor assembly; 003-valve body; 004-valve seat; 005-valve core; 006-valve needle body; 007-limiting plate; 071-protrusion; 008-guide bushing. DETAILED DESCRIPTION
[0027] 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.
[0028] 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.
[0029] 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.
[0030] 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.
[0031] 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.
[0032] Refer to the following Figures 1 to 4 The present invention describes an electric valve plastic nut assembly and an electric valve structure according to some embodiments of the present invention.
[0033] Please combine Figure 1-Figure 3 In this embodiment, the electric valve plastic nut assembly includes a metal base 100 and a plastic body 200. The metal base 100 has a first side 101 and a second side 102 opposite each other. The first side 101 is provided with a positioning groove 103 for positioning the valve needle body 006 for insertion of the positioning sleeve. The metal base 100 is provided with a first positioning hole 104 for the valve needle body 006 to pass through. The two ends of the first positioning hole 104 are respectively located on the first side 101 and the second side 102, that is, the first positioning hole 104 passes through the first side 101 and the second side 102. The plastic body 200 is provided with a second positioning hole. A threaded groove for threaded connection with the guide bushing 008 is provided on part of the hole wall of the second positioning hole. The plastic body 200 is fixedly connected to the metal base 100 and is located on the second side 102. The first positioning hole 104 and the second positioning hole are connected.
[0034] Based on the above, the working mode of the electric valve plastic nut assembly provided in this embodiment is as follows:
[0035] The electric valve's plastic nut assembly, guide bushing 008, and valve needle body 006 work together. The plastic body 200 is screwed onto the guide bushing 008 using the threaded groove on the wall of its second positioning hole. The metal base 100 is connected to the rotor assembly 002. When the rotor assembly 002 is activated, the plastic body 200 rotates with the rotor assembly 002. As the plastic body 200 rotates, it rises and falls along the axis of the guide bushing 008, driving the valve needle body 006 up and down, adjusting the position of the valve needle body 006. The valve needle body 006 cooperates with the channel on the valve core 005. When the valve needle body 006 rises, the channel opens. When the valve needle body 006 descends, the flow area of the channel decreases until it is closed.
[0036] It should be noted that by designing the drive nut as a split structure, that is, the drive nut is divided into a metal base 100 and a plastic body 200, which are connected together, the metal base 100 has a high structural strength, which can ensure the overall structural strength of the nut assembly and ensure the safety and reliability of use. At the same time, the plastic body 200 is light in weight, which is conducive to forming thread grooves, is easy to process and manufacture, and has low cost. The weight of the entire nut assembly is lighter than that of an all-metal drive nut, and energy consumption is low during rotation, which saves energy and reduces operating costs. Because the plastic body 200 of the nut assembly is matched with the wire bushing, the two are in contact with plastic and metal, which is less vibration, less noise, and more stable operation than when two metals are in contact.
[0037] The following embodiments illustrate the detailed structure of the electric valve plastic nut assembly provided in this application by way of examples.
[0038] Please combine Figure 1 and Figure 2 In this embodiment, optionally, the metal base 100 includes a square head 110 and a cylindrical barrel 120 of an integrated structure, and the square head 110 and the cylindrical barrel 120 are coaxially arranged. The positioning groove 103 is a circular groove and is arranged in the square head 110. The first positioning hole 104 passes through the square head 110 and the cylindrical barrel 120 at the same time, and one end of the first positioning hole 104 is located on the bottom wall of the positioning groove 103. In other words, the barrel cavity of the cylindrical barrel 120 is part of the first positioning hole 104. The square head 110 and the cylindrical barrel 120 can be integrally formed by stamping or the like. The square head 110 is connected to the rotor assembly 002 through an anti-rotation plate, so that the nut assembly and the rotor assembly 002 are relatively fixed.
[0039] Furthermore, a first concave-convex portion 130 is provided on the outer circumferential surface of the cylindrical barrel 120. The first concave-convex portion 130 includes an annular groove 131 extending circumferentially of the first positioning hole 104 and a strip-shaped groove 132 extending axially of the first positioning hole 104. One end of the strip-shaped groove 132 extends to the groove sidewall of the annular groove 131 near the first side 101, and the other end of the strip-shaped groove 132 extends to the second side 102. In this way, the portion of the cylindrical barrel 120 located near the second side 102 of the annular groove 131 forms a plurality of positioning protrusions 133 evenly spaced along the circumference of the cylindrical barrel 120.
[0040] It should be understood that the strip groove 132 can be an arc groove without obvious inner corners, which is less likely to cause stress concentration and dead corners, and is conducive to the combination of the cylindrical tube 120 and the plastic body 200.
[0041] Please combine Figure 1 and Figure 3 Specifically, the portion of the cylindrical barrel 120 corresponding to the second side 102 is inserted into the plastic body 200. The two can be integrally formed by injection molding or other methods. When the plastic body 200 is injection-molded onto the cylindrical barrel 120, the plastic body 200 completely encloses the first concave-convex portion 130. That is, the plastic body 200 includes an annular groove, a plurality of strip-shaped grooves 132, and a plurality of positioning protrusions 133. The plastic body 200 forms a mounting groove 210 at a position corresponding to the cylindrical barrel 120, and a second concave-convex portion is formed on the groove wall of the mounting groove 210 at positions corresponding to the annular groove and the strip-shaped groove 132. With this design, after the plastic body 200 and the cylindrical barrel 120 are combined, the first concave-convex portion 130 and the second concave-convex portion snap-fit together, interlocking with each other and providing a secure and reliable connection. Moreover, since the strip groove 132 is an arc groove, after the plastic body 200 is partially inserted into the strip groove 132, there is less likely to be a dead angle in the combination, that is, the plastic body 200 can fill the entire strip groove 132 during injection molding, and the combination is tight.
[0042] Furthermore, a demoulding groove 220 is provided on the outer peripheral surface of the plastic body 200. After the injection molding of the plastic body 200 and the metal base 100 is completed, the mold is clamped in the demoulding groove 220, and the plastic nut assembly is rotated and dragged out to facilitate demoulding.
[0043] It should be understood that there can be multiple demolding grooves 220, and multiple demolding grooves 220 are arranged at intervals in the circumferential direction of the plastic body 200. For example, in this embodiment, there are two demolding grooves 220, and demolding using multiple demolding grooves 220 has higher stability.
[0044] Furthermore, a stopper 230 is provided on the end face of the plastic body 200 away from the second side 102 for abutting and cooperating with the protrusion 071 on the stopper plate 007. The stopper 230 is integrally formed with the plastic body 200, and the two are firmly and reliably connected, not easily breaking or deforming during use, and having a long service life.
[0045] The electric valve plastic nut assembly provided in this embodiment is a combination of a metal base 100 and a plastic body 200. The metal base 100 has high structural strength, ensuring the overall structural strength of the nut assembly. The plastic body 200 is easy to process and has a light weight, which reduces the processing difficulty, reduces energy consumption during operation, and saves energy and reduces costs.
[0046] Please combine Figure 4 This embodiment also provides an electric valve structure. Since the electric valve structure includes the electric valve plastic nut assembly, it has all the beneficial effects of the electric valve plastic nut assembly, which will not be described in detail here.
[0047] It should be understood that the detailed structure of the electric valve structure 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 structure is not elaborated in detail. For ease of understanding, the important components of the electric valve structure are introduced and explained.
[0048] Please combine Figure 4For example, the electric valve assembly also includes a housing 001, a rotor assembly 002, a valve body 003, a valve seat 004, a valve core 005, a valve needle body 006, a limit plate 007 and a guide bushing 008. The rotor assembly 002 is installed outside the metal base 100 of the nut assembly, and the two are fixedly matched. When the rotor assembly 002 is energized, it rotates, driving the nut assembly to rotate together. The housing 001 cover is arranged outside the rotor assembly 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, and the two ends of the channel are respectively connected to the two interfaces. The limiting plate 007 is sleeved onto the outside of the guide bushing 008, which is fixed to the valve seat 004. The limiting plate 007 is welded to the valve seat 004, and the top of the limiting plate 007 has a protrusion 071 that cooperates with the limiting protrusion 071. The plastic body 200 of the nut assembly is screwed onto the outside of the guide bushing 008. In this way, the valve seat 004, valve body 003, limiting plate 007 and guide bushing 008 are all fixed. The valve needle body 006 cooperates with the metal base 100 of the nut assembly. The valve needle body 006 passes through the guide bushing 008 and valve seat 004 and then extends into the valve core 005. When the nut assembly rotates under the drive of the rotor assembly 002, it drives the valve needle body 006 to rise and fall. The rise and fall of the valve needle body 006 can correspondingly open or close the channel, or adjust the flowable area of the channel to achieve flow regulation. Specifically, in this embodiment, in the initial state, the valve needle body 006 closes the channel, and the rotor assembly 002 drives the nut assembly to rotate, driving the valve needle body 006 to rise, thereby opening the channel.
Claims
1. A plastic nut assembly for an electric valve, characterized in that: include: A metal base (100) and a plastic body (200), wherein the metal base (100) has a first side (101) and a second side (102) opposite to each other, the first side (101) being provided with a positioning groove (103) for positioning the valve needle body (006) for insertion of the positioning sleeve, and the metal base (100) being provided with a first positioning hole (104) for the valve needle body (006) to pass through; the plastic body (200) being provided with a second positioning hole, and a threaded groove for screwing with the guide bushing (008) being provided on part of the hole wall of the second positioning hole, the plastic body (200) being fixedly connected to the metal base (100) and being located on the second side (102), and the first positioning hole (104) being communicated with the second positioning hole.
2. The electric valve plastic nut assembly according to claim 1, characterized in that: The second side (102) of the metal base (100) is inserted into the plastic body (200).
3. The electric valve plastic nut assembly according to claim 2, characterized in that: The surface of the metal base (100) is provided with a first concave-convex portion (130), an end surface of the plastic body (200) is provided with a mounting groove (210), a groove wall of the mounting groove (210) is provided with a second concave-convex portion, the second side (102) of the metal base (100) is inserted into the mounting groove (210), and the first concave-convex portion (130) and the second concave-convex portion are snap-fitted.
4. The electric valve plastic nut assembly according to claim 3, characterized in that: The first concave-convex portion (130) includes an annular groove (131) extending in the circumferential direction of the first positioning hole (104) and a strip groove (132) extending in the axial direction of the first positioning hole (104), one end of the strip groove (132) extends to the groove side wall of the annular groove (131) close to the first side (101), and the other end of the strip groove (132) extends to the second side (102).
5. The electric valve plastic nut assembly according to claim 3, characterized in that: The plastic body (200) is injection-molded outside the metal base (100), and the first concave-convex portion (130) is wrapped by the plastic body (200).
6. The electric valve plastic nut assembly according to claim 1, characterized in that: The first side (101) of the metal base (100) is configured as a square head (110).
7. The electric valve plastic nut assembly according to claim 1, characterized in that: A demoulding groove (220) is provided on the outer peripheral surface of the plastic body (200).
8. The electric valve plastic nut assembly according to claim 7, characterized in that: The demoulding grooves (220) are multiple in number and are arranged at intervals in the circumferential direction of the plastic body (200).
9. The electric valve plastic nut assembly according to claim 1, characterized in that: A limiting boss (230) is convexly provided on the end surface of the plastic body (200) away from the second side (102) for abutting and cooperating with the protrusion (071) on the limiting plate (007).
10. An electric valve structure, characterized in that: The electric valve structure includes: The electric valve plastic nut assembly according to any one of claims 1 to 9.