Rotor assembly and solenoid valve

Abstract

A rotor assembly and electromagnetic valve, which relates to the technical field of valves, comprises a connecting plate and a stop rod, the connecting plate is provided with a first plug-in part, the stop rod is provided with a second plug-in part, the first plug-in part and the second plug-in part are plug-in matched, and the connecting plate and the stop rod are welded and fixed at the plug-in positions of the first plug-in part and the second plug-in part, so that the connecting plate and the stop rod are synchronously rotated. It can simplify the structure, reduce the parts, improve the assembly convenience, and reduce the processing manufacturing cost.

Description

Technical Field

[0001] This invention relates to the field of valve technology, and more specifically, to a rotor assembly and a solenoid valve. Background Technology

[0002] Electronic expansion valves are commonly used to regulate fluid flow in various heat exchange equipment such as air conditioners, refrigerators, and heat pump water heaters. The basic working principle of an electronic expansion valve is to regulate the fluid flow by controlling the opening of the valve, thereby achieving system functionality and precise control. An electronic expansion valve typically includes a valve seat assembly, a nut assembly, a valve needle screw assembly, and a rotor assembly. The valve seat assembly usually includes a valve seat and a connecting pipe, with a valve port on the seat. The valve seat and connecting pipe are usually welded together to form the valve seat assembly. The valve needle of the valve needle screw assembly is installed inside the nut of the nut assembly.

[0003] A rotor assembly typically includes a fixed plate and a stop rod connected to the fixed plate. The stop rod is bent and needs to be clamped and fixed together with the fixed plate using a nut, which makes the rotor assembly complex and increases production costs. Summary of the Invention

[0004] The objectives of this invention include, for example, providing a rotor assembly and a solenoid valve that can simplify the structure, reduce the number of parts, improve assembly convenience, and reduce processing and manufacturing costs.

[0005] The embodiments of the present invention can be implemented as follows: In a first aspect, the present invention provides a rotor assembly, comprising: The connecting plate and the stop rod are provided. The connecting plate is provided with a first insertion part and the stop rod is provided with a second insertion part. The first insertion part and the second insertion part are inserted and engaged. The connecting plate and the stop rod are welded and fixed at the insertion position of the first insertion part and the second insertion part, so that the connecting plate and the stop rod rotate synchronously.

[0006] In an optional embodiment, the first plug portion is configured as a plug hole, and the second plug portion is configured as a plug protrusion, wherein the plug protrusion is plugged into the plug hole.

[0007] In an optional embodiment, the stop rod is provided with a limiting part, which contacts the connecting plate to limit the depth of the insertion protrusion inserted into the socket.

[0008] In an optional embodiment, the connecting plate has a first plate surface and a second plate surface opposite each other in its thickness direction, and the limiting portion may selectively contact the first plate surface or the second plate surface.

[0009] In an optional embodiment, the stop rod includes a rod body and a limiting block. The rod body and the insertion protrusion are both fixedly connected to the limiting block, and the rod body and the insertion protrusion are located on opposite sides of the limiting block. The limiting part is disposed on the side of the limiting block away from the rod body. The limiting block and the rod body are both located on one side of the second plate surface, and the limiting part is in contact with the second plate surface.

[0010] In an optional embodiment, the stop rod includes a rod body and a limiting block. The insertion protrusion is provided on the rod body. The insertion protrusion and the stop rod are both located on the same side of the limiting block. The limiting part is provided on the side of the limiting block closer to the rod body. The limiting block is located on one side of the first plate surface, and the limiting part is in contact with the first plate surface.

[0011] In an optional embodiment, the insertion protrusion is interference-fitted with the socket; the orthographic projection of the rod body in the preset plane is a first projection, the orthographic projection of the socket in the preset plane is a second projection, the first projection is located within the second projection, and the boundary of the first projection and the boundary of the second projection do not coincide at least partially; the preset plane is perpendicular to the axis of the socket.

[0012] In an optional embodiment, the stop rod is provided with a positioning groove for engaging with the slip ring.

[0013] In an optional embodiment, the rotor assembly further includes a permanent magnet, which is injection molded as an integral structure with the connecting plate.

[0014] In a second aspect, the present invention provides a solenoid valve, the solenoid valve comprising: The rotor assembly described in any of the foregoing embodiments.

[0015] The beneficial effects of the embodiments of the present invention are at least as follows: In summary, the rotor assembly provided in this embodiment includes a connecting plate and a stop rod. The connecting plate is provided with a first insertion part, and the stop rod is provided with a second insertion part. During assembly, the stop rod can be directly inserted into the connecting plate from above or below through the first and second insertion parts. Then, the connection between the first and second insertion parts is welded and fixed by welding technology. The installation method of the connecting plate and the stop rod is simple and reliable, and eliminates the need to press the stop rod against the connecting plate with a nut. This simplifies the structure of the stop rod, reduces the number of parts, reduces the difficulty of disassembly and assembly, and also reduces the processing and manufacturing costs. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the rotor assembly provided in this embodiment; Figure 2 This is a cross-sectional view of the rotor assembly provided in this embodiment; Figure 3 This is a schematic diagram of the connecting plate provided in this embodiment; Figure 4 This is a schematic diagram of the stop rod provided in this embodiment; Figure 5 This is a schematic diagram of the structure of the first modified example of the stop rod provided in this embodiment; Figure 6 This is a schematic diagram of the second modified example of the stop rod provided in this embodiment; Figure 7 This is a schematic diagram of the structure of the connecting plate and the stop rod in this embodiment. Figure 8 This is an exploded view of the solenoid valve provided in this embodiment; Figure 9 This is a schematic diagram of the assembly structure of the solenoid valve provided in this embodiment.

[0018] icon: 100-Rotor assembly; 110-Connecting plate; 111-Plate body; 1111-First plate surface; 1112-Second plate surface; 112-Positioning cylinder; 113-First insertion part; 120-Stop rod; 121-Rod body; 1211-Positioning groove; 122-Limiting block; 1221-Limiting part; 123-Second insertion part; 130-Permanent magnet; 200-Fixing nut; 210-Threaded hole; 220-External thread groove; 300-Slip ring; 400-Valve needle. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0020] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0021] 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.

[0022] In the description of this invention, it should be noted that if terms such as "upper," "lower," "inner," or "outer" are used to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of this invention is usually placed, they are only for the convenience of describing this invention and 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, and therefore should not be construed as a limitation of this invention.

[0023] Furthermore, the terms "first" and "second" are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0024] It should be noted that, where there is no conflict, the features in the embodiments of the present invention can be combined with each other.

[0025] Please refer to Figures 1-7 This embodiment provides a rotor assembly 100, which includes a connecting plate 110 and a stop rod 120. The connecting plate 110 is provided with a first insertion part 113, and the stop rod 120 is provided with a second insertion part 123. The first insertion part 113 and the second insertion part 123 are inserted and engaged, and the connecting plate 110 and the stop rod 120 are welded and fixed at the insertion position of the first insertion part 113 and the second insertion part 123, so that the connecting plate 110 and the stop rod 120 rotate synchronously.

[0026] As described above, the working principle of the rotor assembly 100 provided in this embodiment is as follows: The connecting plate 110 and the stop rod 120 are fixedly connected together. The connecting plate 110 is connected to the permanent magnet 130. After the coil is energized, the permanent magnet 130 rotates under the action of the magnetic field force, which drives the stop rod 120 to rotate together. When the stop rod 120 rotates, it can contact the slip ring 300 and drive the slip ring 300 to rotate outside the fixed nut 200. The slip ring 300 has two extreme positions on the fixed nut 200. When the slip ring 300 is in the extreme position, it cannot continue to rotate. The stop rod 120 cannot continue to rotate and cannot drive the valve needle 400 connected to the connecting plate 110 to rotate, thus realizing the adjustment of the valve opening and closing size.

[0027] Since the connecting plate 110 is provided with a first insertion part 113 and the stop rod 120 is provided with a second insertion part 123, during assembly, the stop rod 120 can be directly inserted into the connecting plate 110 from above or below through the first insertion part 113 and the second insertion part 123. Then, the connection between the first insertion part 113 and the second insertion part 123 is welded and fixed by welding technology. The installation method of the connecting plate 110 and the stop rod 120 is simple and reliable, and it eliminates the need to press the stop rod 120 against the nut on the connecting plate 110. This simplifies the structure of the stop rod 120 and reduces the number of parts, which not only reduces the difficulty of disassembly and assembly but also reduces the processing and manufacturing costs.

[0028] The following embodiments illustrate the details of the rotor assembly 100 of this application by way of example.

[0029] Please refer to Figures 1-7 In this embodiment, optionally, the rotor assembly 100 includes a connecting plate 110, a stop rod 120, and a permanent magnet 130. The connecting plate 110 and the permanent magnet 130 are injection molded as a single unit, with the connecting plate 110 located within the inner hole of the permanent magnet 130. The stop rod 120 is inserted into the connecting plate 110, and the insertion position of the stop rod 120 into the connecting plate 110 is welded and fixed. Thus, when the permanent magnet 130 rotates, it can drive the connecting plate 110 and the stop rod 120 to rotate together.

[0030] Please refer to Figures 2-3 In this embodiment, optionally, the connecting plate 110 includes a plate body 111 and a positioning cylinder 112. The plate body 111 and the positioning cylinder 112 are coaxial and are configured as an integral structure. The plate body 111 has a through hole in the middle that communicates with the cavity of the positioning cylinder 112. The valve needle 400 can pass through the through hole and the cavity and is fixedly connected to the plate body 111 and the positioning cylinder 112. The plate body 111 is also provided with a first insertion part 113, which can be configured as an insertion hole. The shape of the insertion hole is designed as needed. For example, in this embodiment, the insertion hole is a strip hole. Furthermore, the insertion hole is eccentrically positioned with respect to the through hole.

[0031] Furthermore, the plate body 111 has a first plate surface 1111 and a second plate surface 1112 opposite to each other in its thickness direction, so as to Figure 2With reference to the viewing angle, the first plate surface 1111 is located above the second plate surface 1112. The two ends of the insertion hole are located on the first plate surface 1111 and the second plate surface 1112, respectively. Simultaneously, the plate body 111 also has an annular circumferential surface connecting the first plate surface 1111 and the second plate surface 1112. The cross-sectional profile of the annular circumferential surface is set to be non-circular; for example, the annular circumferential surface has at least one plane. With this design, when the plate body 111 and the permanent magnet 130 are injection molded into a single structure, the plate body 111 and the permanent magnet 130 are less likely to rotate relative to each other, resulting in a more robust and reliable connection.

[0032] It should be understood that in other embodiments, the first insertion portion 113 may also be configured as a protrusion or the like.

[0033] Please refer to Figures 4-6 In this embodiment, optionally, the stop rod 120 includes a rod body 121 and a limiting block 122. The rod body 121 and the limiting block 122 are fixedly connected, and the two are roughly T-shaped structures.

[0034] Please refer to Figure 4 Optionally, in the first optional embodiment, a second insertion portion 123 is provided on the side of the limiting block 122 away from the rod body 121. The second insertion portion 123 can be configured as an insertion protrusion, which can be inserted into the insertion hole, and the insertion protrusion and the insertion hole are interference-fitted. Under this structure, Figure 3 With reference to the viewing angle, when the stop rod 120 is assembled with the connecting plate 110, the stop rod 120 is located below the connecting plate 110. The stop rod 120 is inserted into the socket from one side of the second plate surface 1112 using a plug-in protrusion. Then, the plug-in protrusion is welded to the joint of the connecting plate 110 corresponding to the socket port. The welding position can be a full circle, or only welded to the connecting plate 110 on the plug-in protrusion and the inner or outer side. At this time, the limiting block 122 is located on one side of the second plate surface 1112. The side of the limiting block 122 away from the rod body 121 is set as the limiting part 1221. The limiting part 1221 can fit against the second plate surface 1112, thereby limiting the depth of the plug-in protrusion inserted into the socket, which can not only ensure the fitting accuracy, but also improve the assembly efficiency.

[0035] Please refer to Figure 5 Optionally, in a second embodiment, the rod body 121 is provided with a second insertion portion 123, which is an insertion protrusion with a width greater than that of the rod body 121. For example, the rod body 121 is elongated, and a portion of the rod body 121 is widened, extending to the side where the limiting block 122 connects to the rod body 121; this widened portion is the second insertion portion 123. In this structure, with... Figure 3With the perspective as a reference, when the stop rod 120 is assembled with the connecting plate 110, the stop rod 120 is located above the connecting plate 110. The lower end of the rod body 121 first enters the insertion hole, and then the insertion protrusion is inserted into the insertion hole. Throughout the process, the limiting block 122 is located on one side of the first plate surface 1111, that is, the limiting block 122 is located above the first plate surface 1111. The side of the limiting block 122 that connects with the rod body 121 is set as the limiting part 1221. During the insertion process, the limiting part 1221 can contact the first plate surface 1111, thereby limiting the insertion depth of the insertion protrusion.

[0036] In the second optional embodiment, it should be noted that since the insertion protrusion and the insertion hole are interference-fitted, and the width of the insertion protrusion is greater than the width of the rod body 121, when the rod body 121 is inserted into the insertion hole, the contact with the hole wall can be reduced, and the movement of the rod body 121 within the insertion hole is smoother, facilitating assembly. In other words, the orthographic projection of the rod body 121 in the preset plane is the first projection, and the orthographic projection of the insertion hole in the preset plane is the second projection. The first projection is located within the second projection, and the boundaries of the first projection and the second projection do not coincide at least partially. The preset plane is perpendicular to the axis of the insertion hole. For example, in this embodiment, the insertion protrusion is only thickened in the width direction at a certain location of the rod body 121, and the orthographic projections of the two partially coincide in the preset plane. In other embodiments, the first projection of the rod body 121 can fall completely into the second projection of the insertion protrusion, and the boundary of the first projection of the rod body 121 can have a gap with the boundary of the second projection of the insertion protrusion.

[0037] It should be understood that the rod body 121, the limiting block 122, and the second insertion part 123 can be configured as an integral structure.

[0038] Optionally, in some embodiments, the second insertion portion 123 may also be configured as a through hole or a blind hole, etc. The first insertion portion 113 and the second insertion portion 123 need only be able to be inserted and mated with each other.

[0039] Please refer to Figure 6 Optionally, in some embodiments, a positioning groove 1211 may be provided on the rod body 121. The groove opening of the positioning groove 1211 is located at the end of the rod body 121 away from the limiting block 122. The groove depth of the positioning groove 1211 is designed as needed, as long as it does not affect the sliding stroke of the slip ring 300.

[0040] The rotor assembly 100 provided in this embodiment has a simple structure, is easy to assemble, has few parts, and has low processing and manufacturing costs.

[0041] Please refer to Figures 8-9This embodiment also provides a solenoid valve, which includes a rotor assembly 100, a fixing nut 200, a slip ring 300, and a valve needle 400. The fixing nut 200 is provided with a threaded hole 210 and an external threaded groove 220. One end of the valve needle 400 passes through the through hole and the cylindrical cavity of the connecting plate 110 and is fixedly connected to the connecting plate 110. The other end of the valve needle 400 is screwed into the threaded hole 210. The slip ring 300 is sleeved in the external threaded groove 220. The outer end of the slip ring 300 is located on the rotation path of the rod body 121. When the rod body 121 rotates, it can actuate the slip ring 300, causing the slip ring 300 to rotate and move axially within the external threaded groove 220. In actual operation, the fixing nut 200 is stationary, the rotor assembly 100 moves, driving the valve needle 400 to rotate. The valve needle 400 rotates and rises and falls simultaneously, thereby driving the valve core connected to the valve needle 400 to rise and fall. The rise and fall of the valve core can control the opening degree of the valve port.

[0042] When the rod body 121 is provided with a positioning groove 1211, the outer end of the slip ring 300 is inserted into the positioning groove 1211. In this way, when the solenoid valve reverses, it avoids a free stroke, thereby reducing impact noise. That is to say, when the rod body 121 is not provided with a positioning groove 1211, one side of the rod body 121 is in contact with the slip ring 300. After rotating clockwise to the set position, if it needs to be rotated counterclockwise to reset, the rod body 121 rotates in the opposite direction. The rod body 121 needs to rotate nearly 180° of free stroke before it can contact the slip ring 300 again and drive the slip ring 300 to move. This may generate impact noise. When the positioning groove 1211 is provided on the rod body 121, the positioning groove 1211 and the slip ring 300 are in clearance fit. This can reduce the contact friction between the groove wall of the positioning groove 1211 and the slip ring 300, ensuring that the slip ring 300 moves smoothly along the axial direction of the fixed nut 200 in the positioning groove 1211. It can also reduce the backlash caused by reversing and reduce noise.

[0043] The solenoid valve provided in this embodiment has advantages such as simple structure, convenient disassembly and assembly, and low cost.

[0044] Obviously, the solenoid valve also includes other components for realizing its basic function, which can be combined with existing known structures. To avoid repetition and redundancy, they will not be described in detail in this embodiment.

[0045] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A rotor assembly, characterized in that, include: A connecting plate (110) and a stop rod (120) are provided. The connecting plate (110) is provided with a first insertion part (113), and the stop rod (120) is provided with a second insertion part (123). The first insertion part (113) and the second insertion part (123) are inserted into each other. The connecting plate (110) and the stop rod (120) are welded and fixed at the insertion position of the first insertion part (113) and the second insertion part (123) so that the connecting plate (110) and the stop rod (120) rotate synchronously.

2. The rotor assembly according to claim 1, characterized in that: The first plug-in part (113) is configured as a plug hole, and the second plug-in part (123) is configured as a plug protrusion, wherein the plug protrusion is plugged into the plug hole.

3. The rotor assembly according to claim 2, characterized in that: The stop rod (120) is provided with a limiting part (1221), which contacts the connecting plate (110) to limit the depth of the insertion protrusion inserted into the socket.

4. The rotor assembly according to claim 3, characterized in that: The connecting plate (110) has a first plate surface (1111) and a second plate surface (1112) opposite each other in its thickness direction, and the limiting part (1221) can selectively contact the first plate surface (1111) or the second plate surface (1112).

5. The rotor assembly according to claim 4, characterized in that: The stop rod (120) includes a rod body (121) and a limiting block (122). The rod body (121) and the insertion protrusion are both fixedly connected to the limiting block (122), and the rod body (121) and the insertion protrusion are located on opposite sides of the limiting block (122). The limiting part (1221) is disposed on the side of the limiting block (122) away from the rod body (121). The limiting block (122) and the rod body (121) are both located on one side of the second plate surface (1112), and the limiting part (1221) is in contact with the second plate surface (1112).

6. The rotor assembly according to claim 4, characterized in that: The stop rod (120) includes a rod body (121) and a limiting block (122). The insertion protrusion is provided on the rod body (121). The insertion protrusion and the stop rod (120) are both located on the same side of the limiting block (122). The limiting part (1221) is provided on the side of the limiting block (122) close to the rod body (121). The limiting block (122) is located on the side of the first plate surface (1111). The limiting part (1221) is in contact with the first plate surface (1111).

7. The rotor assembly according to claim 6, characterized in that: The insertion protrusion is interference-fitted with the insertion hole; the orthographic projection of the rod body (121) in the preset plane is the first projection, the orthographic projection of the insertion hole in the preset plane is the second projection, the first projection is located within the second projection, and the boundary of the first projection and the boundary of the second projection do not coincide at least partially; The preset plane is perpendicular to the axis of the socket.

8. The rotor assembly according to any one of claims 1-7, characterized in that: The stop rod (120) is provided with a positioning groove (1211) for engaging with the slip ring (300).

9. The rotor assembly according to claim 1, characterized in that: The rotor assembly (100) also includes a permanent magnet (130), which is injection molded as an integral structure with the connecting plate (110).

10. A solenoid valve, characterized in that, The solenoid valve includes: The rotor assembly according to any one of claims 1-9.

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