Electronic expansion valve connecting mechanism and electronic expansion valve

Abstract

This invention relates to the field of electronic expansion valve technology, and in particular to an electronic expansion valve connection mechanism and an electronic expansion valve. The electronic expansion valve connection mechanism includes: a rotor assembly, a transmission assembly, a valve needle, and a valve seat. The transmission assembly is connected to both the rotor assembly and the valve needle. The rotor assembly, transmission assembly, and valve needle are all mounted on the valve seat. Rotation of the rotor assembly drives the valve needle to move along the axial direction of the valve seat via the transmission assembly. The transmission assembly includes a first connecting member and a second connecting member. The first connecting member abuts against the valve needle and is connected to the rotor assembly via a first meshing structure. The first connecting member has an anti-rotation structure. The top and bottom of the second connecting member are connected to the first connecting member and the valve needle, respectively. The electronic expansion valve connection mechanism provided by this invention has a simple structure, high manufacturability, high modularity, low assembly difficulty, and low production cost.

Description

Technical Field

[0001] This invention relates to the field of electronic expansion valve technology, and in particular to an electronic expansion valve connection mechanism and an electronic expansion valve. Background Technology

[0002] In the air conditioning system of new energy vehicles, the refrigerant circuit is a loop. To regulate and control the refrigerant flow rate according to different needs, one or more electronic expansion valve components are often required. The electronic expansion valve mainly consists of a coil, rotor, transmission components, valve needle component, and valve seat. The rotor rotates due to the magnetic induction of the coil. The rotor typically rotates together with a rotating rod. The rotation of the rotating rod is transmitted to the valve needle component through the transmission components, causing the valve needle to move up and down. The flow rate is controlled by adjusting the valve opening. It is important to note that the valve needle must not rotate. If the valve needle rotates while moving up and down, it will accelerate wear and severely affect the service life of the electronic expansion valve. Therefore, the rotating rod and valve needle need to be separated and moved independently. Existing transmission components are complex in structure, difficult to assemble, and have high production costs. Furthermore, the two separate parts, the rotating rod and the valve needle, often have misalignment issues during manufacturing and assembly. Summary of the Invention

[0003] The purpose of this invention is to provide an electronic expansion valve connection mechanism and an electronic expansion valve, so as to alleviate the problems of complex structure, difficult assembly and high production cost of existing electronic expansion valve transmission components.

[0004] To solve the above-mentioned technical problems, the technical solution provided by the present invention is as follows:

[0005] In a first aspect, the present invention provides an electronic expansion valve connection mechanism, comprising: a rotor assembly, a transmission assembly, a valve needle, and a valve seat, wherein the transmission assembly is respectively connected to the rotor assembly and the valve needle, and the rotor assembly, the transmission assembly, and the valve needle are all mounted on the valve seat, and the rotor assembly rotates to drive the valve needle to move along the axial direction of the valve seat through the transmission assembly;

[0006] The transmission assembly includes a first connector and a second connector. The first connector abuts against the valve needle and is connected to the rotor assembly via a first engagement structure. The first connector is provided with an anti-rotation structure. The top and bottom of the second connector are respectively connected to the first connector and the valve needle.

[0007] Furthermore, the second connector includes a first arc-shaped block at the top, and the side wall of the first connector is provided with a first arc-shaped groove. The second connector is connected to the first connector by inserting the first arc-shaped block into the first arc-shaped groove.

[0008] Furthermore, the second connector includes a second arc-shaped block located at the bottom, and the valve needle sidewall is provided with a second arc-shaped groove. The second connector is connected to the valve needle by inserting the second arc-shaped block into the second arc-shaped groove.

[0009] Furthermore, the second arc-shaped block and the second arc-shaped groove are provided with a gap in the radial direction.

[0010] Furthermore, the first connector includes a first connecting segment and a second connecting segment, the second connecting segment being connected below the first connecting segment, and the diameter of the second connecting segment being smaller than the diameter of the first connecting segment. The first arc-shaped groove is circumferentially disposed on the side wall of the second connecting segment, and the anti-rotation structure is disposed on the first connecting segment.

[0011] Furthermore, the first connecting segment and the second connecting segment are perforated with threaded holes, and the first meshing structure includes mutually engaging external threads and internal threads. One of the threaded holes and the rotor assembly is provided with the external thread, and the other is provided with the internal thread.

[0012] Furthermore, the rotor assembly includes a magnetic component and a rotating shaft, the rotating shaft being rotatably connected to the magnetic component, and the bottom of the rotating shaft extending into the threaded hole and connecting to the first connecting component.

[0013] Furthermore, the valve seat is provided with a fixing member, and the anti-rotation structure includes a connecting groove provided in the first connecting section, and the fixing member extends into the connecting groove and connects with the first connecting member.

[0014] Furthermore, the fixing member includes a limiting section and an anti-rotation section. The limiting section is connected to the anti-rotation section, and the anti-rotation section extends into the connecting groove and connects to the first connecting member. The limiting section is used to limit the maximum height to which the first connecting member rises.

[0015] In a second aspect, the present invention provides an electronic expansion valve, including the electronic expansion valve connection mechanism described in the first aspect.

[0016] The embodiments of the present invention bring the following beneficial effects:

[0017] The present invention provides an electronic expansion valve connection mechanism, comprising: a rotor assembly, a transmission assembly, a valve needle, and a valve seat. The transmission assembly is connected to the rotor assembly and the valve needle respectively. The rotor assembly, the transmission assembly, and the valve needle are all mounted on the valve seat. The rotation of the rotor assembly drives the valve needle to move along the axial direction of the valve seat through the transmission assembly. The transmission assembly includes a first connecting member and a second connecting member. The first connecting member abuts against the valve needle and is connected to the rotor assembly through a first engagement structure. The first connecting member is provided with an anti-rotation structure. The top and bottom of the second connecting member are respectively connected to the first connecting member and the valve needle.

[0018] The rotor assembly rotates, driving the first connecting member to move via the first meshing structure. Due to the presence of the anti-rotation structure, the first connecting member cannot rotate and can only move up and down along the axis of the valve seat. Since the second connecting member is connected to both the first connecting member and the valve needle, the valve needle moves up and down synchronously with the first connecting member along the axis of the valve seat. This converts the rotational motion of the rotor assembly into the vertical displacement of the valve needle along the valve seat axis, adjusting the opening of the electronic expansion valve to control the flow rate. The electronic expansion valve connection mechanism provided by this invention has a simple structure, high manufacturability, high modularity, low assembly difficulty, and low production cost.

[0019] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the specific embodiments or related technologies of the present invention, the drawings used in the description of the specific embodiments or related technologies will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0021] Figure 1 A schematic diagram of an electronic expansion valve provided in an embodiment of the present invention;

[0022] Figure 2 for Figure 1 A sectional view;

[0023] Figure 3 This is a schematic diagram of the structure of the first connector provided in an embodiment of the present invention;

[0024] Figure 4 This is a schematic diagram of the structure of the second connector provided in an embodiment of the present invention;

[0025] Figure 5This is a schematic diagram of the valve needle provided in an embodiment of the present invention.

[0026] icon:

[0027] 100-Valve needle; 110-Second arc groove; 200-Valve seat; 300-Rotor assembly; 310-Magnetic component; 320-Rotating shaft; 400-Transmission assembly; 410-First connector; 411-First connecting section; 412-Second connecting section; 413-First arc groove; 414-Threaded hole; 415-Connecting groove; 420-Second connector; 421-First arc block; 422-Second arc block; 500-Fixing component; 600-Spring; 700-Sleeve; 800-Valve seat sealing ring; 900-Valve needle sealing ring. Detailed Implementation

[0028] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0029] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0030] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Physical quantities in formulas, unless otherwise specified, should be understood as basic quantities in the International System of Units (SI), or derived quantities derived from basic quantities through mathematical operations such as multiplication, division, differentiation, or integration.

[0031] Furthermore, terms such as "horizontal," "vertical," and "sag" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0032] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0033] The following detailed description of some embodiments of the present invention is provided in conjunction with the accompanying drawings. Unless otherwise specified, the following embodiments and features described herein can be combined with each other. Figure 1 A schematic diagram of an electronic expansion valve provided in an embodiment of the present invention; Figure 2 for Figure 1 A sectional view; Figure 3 This is a schematic diagram of the structure of the first connector provided in an embodiment of the present invention; Figure 4 This is a schematic diagram of the structure of the second connector provided in an embodiment of the present invention; Figure 5 This is a schematic diagram of the valve needle provided in an embodiment of the present invention.

[0034] Example 1

[0035] An electronic expansion valve mainly consists of a coil, rotor, transmission components, valve needle assembly, and valve seat. The rotor rotates due to the magnetic induction of the coil. The rotor typically rotates together with a rotating rod. The rotation of the rotating rod is transmitted to the valve needle assembly through the transmission components, causing the valve needle to move up and down. The flow rate is controlled by adjusting the valve opening. It is important to note that the valve needle must not rotate. If the valve needle rotates while moving up and down, it will accelerate wear and severely affect the service life of the electronic expansion valve. Therefore, it is necessary to separate the rotating rod from the valve needle so that they can move independently. Existing transmission components are complex in structure, difficult to assemble, and have high production costs. Furthermore, the two separate parts, the rotating rod and the valve needle, often have misalignment issues during manufacturing and assembly.

[0036] In view of this, the present invention provides an electronic expansion valve connection mechanism, including: a rotor assembly 300, a transmission assembly 400, a valve needle 100, and a valve seat 200. The transmission assembly 400 is connected to the rotor assembly 300 and the valve needle 100 respectively. The rotor assembly 300, the transmission assembly 400, and the valve needle 100 are all mounted on the valve seat 200. The rotation of the rotor assembly 300 drives the valve needle 100 to move along the axial direction of the valve seat 200 through the transmission assembly 400. The transmission assembly 400 includes a first connecting member 410 and a second connecting member 420. The first connecting member 410 abuts against the valve needle 100 and is connected to the rotor assembly 300 through a first meshing structure. The first connecting member 410 is provided with an anti-rotation structure. The top and bottom of the second connecting member 420 are connected to the first connecting member 410 and the valve needle 100 respectively.

[0037] The rotor assembly 300 rotates, driving the first connecting member 410 to move via the first meshing structure. Due to the presence of the anti-rotation structure, the first connecting member 410 cannot rotate and can only move up and down along the axis of the valve seat 200. Since the second connecting member 420 is connected to both the first connecting member 410 and the valve needle 100, the valve needle 100 moves up and down synchronously with the first connecting member 410 along the axis of the valve seat 200. This converts the rotational motion of the rotor assembly 300 into the vertical displacement of the valve needle 100 along the axis of the valve seat 200, adjusting the opening of the electronic expansion valve to control the flow rate. The electronic expansion valve connection mechanism provided by this invention has a simple structure, high manufacturability, high modularity, low assembly difficulty, and low production cost.

[0038] The structure and connection method of the second connector 420 are described in detail below:

[0039] Please see Figure 3 and Figure 4 The second connector 420 includes a first arc-shaped block 421 located at the top. The side wall of the first connector 410 is provided with a first arc-shaped groove 413. The second connector 420 is connected to the first connector 410 by inserting the first arc-shaped block 421 into the first arc-shaped groove 413.

[0040] Specifically, the second connector 420 is a semi-cylindrical member. The curvature of the first arc-shaped block 421 at the top matches the curvature of the first arc-shaped groove 413. The first arc-shaped block 421 extends into the first arc-shaped groove 413 and abuts against the corresponding upper and lower bottom surfaces of the first arc-shaped groove 413 on the first connector 410. The connection between the arc-shaped block of the first connector 410 and the arc-shaped groove of the second connector 420 is stable and not easy to fall off, ensuring reliable transmission.

[0041] Please continue reading Figure 5The second connector 420 also includes a second arc-shaped block 422 located at the bottom. The valve needle 100 has a second arc-shaped groove 110 on its side wall. The second connector 420 is connected to the valve needle 100 by inserting the second arc-shaped block 422 into the second arc-shaped groove 110.

[0042] The curvature of the second arc-shaped block 422 located at the bottom matches the curvature of the second arc-shaped groove 110. The second arc-shaped block 422 extends into the second arc-shaped groove 110 on the upper part of the valve needle 100 and abuts against the corresponding upper and lower bottom surfaces of the second arc-shaped groove 110 of the valve needle 100. The connection between the valve needle 100 and the arc-shaped block and the arc-shaped groove is stable and not easy to fall off, ensuring the reliability of the transmission process.

[0043] In this embodiment, the first connector 410 has two symmetrically arranged first arc-shaped grooves 413 on its sidewall, and the valve needle 100 has two symmetrically arranged second arc-shaped grooves 110 on its sidewall. Therefore, two second connectors 420 are needed to connect the first connector 410 and the valve needle 100, which further enhances the stability of the connection and improves the service life.

[0044] Furthermore, the second arc-shaped block 422 and the second arc-shaped groove 110 are provided with a gap in the radial direction. The second connecting piece 420 and the valve needle 100 are provided with a gap allowance in the radial direction, so that the valve needle 100 has a certain displacement compensation in the radial direction, which can make up for the misalignment problem of the two separate parts, the rotating rod and the valve needle 100, during the manufacturing and assembly process.

[0045] In an optional embodiment, the first connector 410 includes a first connecting segment 411 and a second connecting segment 412. The second connecting segment 412 is connected to the lower part of the first connecting segment 411, and the diameter of the second connecting segment 412 is smaller than the diameter of the first connecting segment 411. A first arc-shaped groove 413 is provided circumferentially on the side wall of the second connecting segment 412, and an anti-rotation structure is provided on the first connecting segment 411.

[0046] Please see details. Figure 3 The first connecting member 410 can be a nut or other parts with connecting functions. Both the first connecting section 411 and the second connecting section 412 are columnar. The diameter of the first connecting section 411 is larger than the diameter of the second connecting section 412, and the height of the first connecting section 411 is smaller than the height of the second connecting section 412. The bottom surface of the second connecting section 412 abuts against the top surface of the valve needle 100. The side wall of the first connecting section 411 is symmetrically provided with two anti-rotation structures, and the side wall of the second connecting section 412 is symmetrically provided with two first arc-shaped grooves 413.

[0047] Furthermore, the first connecting section 411 and the second connecting section 412 are perforated by a threaded hole 414. The first meshing structure includes mutually mating external threads and internal threads. One of the threaded hole 414 and the rotor assembly 300 is provided with an external thread, and the other is provided with an internal thread.

[0048] The rotor assembly 300 is threadedly connected to the first connector 410. In this embodiment, the rotor assembly 300 is provided with an external thread and the threaded hole 414 is provided with an internal thread. Of course, the rotor assembly 300 can also be provided with an internal thread and the threaded hole 414 can be provided with an external thread.

[0049] The rotor assembly 300 includes a magnetic component 310 and a rotating shaft 320. The rotating shaft 320 is rotatably connected to the magnetic component 310, and the bottom of the rotating shaft 320 extends into a threaded hole 414 and is connected to the first connecting component 410.

[0050] The rotation of the rotating shaft 320 is transmitted to the first connecting member 410 through the thread. Due to the anti-rotation structure, the first connecting member 410 cannot rotate and can only move along the axial direction of the valve seat 200. Then, the valve needle 100 is driven to rise and fall through the second connecting member 420.

[0051] In an optional embodiment, the valve seat 200 is provided with a fixing member 500, and the anti-rotation structure includes a connecting groove 415 provided in the first connecting section 411, with the fixing member 500 extending into the connecting groove 415 and connecting to the first connecting member 410.

[0052] Furthermore, the fixing member 500 includes a limiting section and an anti-rotation section. The limiting section is connected to the anti-rotation section, and the anti-rotation section extends into the connecting groove 415 and is connected to the first connecting member 410. The limiting section is used to limit the maximum height to which the first connecting member 410 rises.

[0053] The fixing member 500 is fixedly installed on the valve seat 200. The anti-rotation section cooperates with the connecting groove 415 opened in the first connecting section 411 to prevent the first connecting member 410 from rotating. The limiting section can limit the maximum height of the first connecting member 410, that is, limit the limit position of the valve needle 100.

[0054] The assembly process of the electronic expansion valve connection mechanism is as follows:

[0055] Please see Figure 2 First, place the spring 600 inside the valve needle 100, with the upper end of the valve needle 100 abutting against the lower end of the first connecting member 410. Then, connect the second connecting member 420 to both the valve needle 100 and the first connecting member 410 simultaneously, ensuring that there is a radial clearance between the second connecting member 420 and the valve needle 100. Next, install the valve needle sealing ring 900 on the outer wall of the lower end of the valve needle 100. Assemble the assembled component onto the valve seat 200, and then assemble the fixing member 500 with the valve seat 200. The rotating rod passes through the center hole of the fixing member 500 and is threadedly connected to the first connecting member 410. Finally, weld the sleeve 700 to the valve seat 200 and the fixing member 500, and fit the valve seat sealing ring 800 onto the lower end of the valve seat 200, completing the overall assembly of the components except for the coil.

[0056] Example 2

[0057] This invention provides an electronic expansion valve, including the electronic expansion valve connection mechanism of Embodiment 1.

[0058] Please see Figure 1 The electronic expansion valve has a simple overall structure and strong manufacturability. It can compensate for the problem of different axes between the two separate parts, the rotating rod and the valve needle 100, during the production and assembly process. It also has a high degree of modularity, simple assembly, and low production cost.

[0059] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. An electronic expansion valve connection mechanism, characterized in that, include: The system comprises a rotor assembly, a transmission assembly, a valve needle, and a valve seat. The transmission assembly is connected to the rotor assembly and the valve needle, respectively. The rotor assembly, the transmission assembly, and the valve needle are all mounted on the valve seat. The rotation of the rotor assembly drives the valve needle to move along the axial direction of the valve seat through the transmission assembly. The transmission assembly includes a first connector and a second connector. The first connector abuts against the valve needle and is connected to the rotor assembly through a first engagement structure. The first connector is provided with an anti-rotation structure. The top and bottom of the second connector are respectively connected to the first connector and the valve needle. The second connector includes a first arc-shaped block located at the top, and the first connector has a first arc-shaped groove on its side wall. The second connector is connected to the first connector by inserting the first arc-shaped block into the first arc-shaped groove. The second connector includes a second arc-shaped block located at the bottom, and the valve needle has a second arc-shaped groove on its side wall. The second connector is connected to the valve needle by inserting the second arc-shaped block into the second arc-shaped groove. The first connector includes a first connecting segment and a second connecting segment. The second connecting segment is connected to the lower part of the first connecting segment, and the diameter of the second connecting segment is smaller than the diameter of the first connecting segment. The first arc-shaped groove is provided circumferentially on the side wall of the second connecting segment, and the anti-rotation structure is provided on the first connecting segment. The valve seat is provided with a fixing member, and the anti-rotation structure includes a connecting groove provided in the first connecting section, and the fixing member extends into the connecting groove and connects with the first connecting member.

2. The electronic expansion valve connection mechanism according to claim 1, characterized in that, The second arc-shaped block and the second arc-shaped groove are provided with a gap in the radial direction.

3. The electronic expansion valve connection mechanism according to claim 1, characterized in that, The first connecting segment and the second connecting segment are perforated by threaded holes. The first meshing structure includes mutually cooperating external threads and internal threads. One of the threaded holes and the rotor assembly is provided with the external thread, and the other is provided with the internal thread.

4. The electronic expansion valve connection mechanism according to claim 3, characterized in that, The rotor assembly includes a magnetic component and a rotating shaft, the rotating shaft being rotatably connected to the magnetic component, and the bottom of the rotating shaft extending into the threaded hole and connecting to the first connecting component.

5. The electronic expansion valve connection mechanism according to claim 1, characterized in that, The fastener includes a limiting section and an anti-rotation section. The limiting section is connected to the anti-rotation section, and the anti-rotation section extends into the connecting groove and connects to the first connector. The limiting section is used to limit the maximum height to which the first connector rises.

6. An electronic expansion valve characterized by Includes the electronic expansion valve connection mechanism as described in any one of claims 1-5.

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