CN211175578U

CN211175578U - Magnetic rotor assembly and electronic expansion valve

Info

Publication number: CN211175578U
Application number: CN201922007020.2U
Authority: CN
Inventors: 曾庆军; 赵俊; 邸志强
Original assignee: Zhejiang DunAn Hetian Metal Co Ltd
Current assignee: Zhejiang DunAn Hetian Metal Co Ltd
Priority date: 2019-11-19
Filing date: 2019-11-19
Publication date: 2020-08-04
Anticipated expiration: 2029-11-19
Also published as: WO2021098301A1; KR20220088500A; JP2023501339A; KR102639708B1

Abstract

The utility model provides a magnetic rotor subassembly and electronic expansion valve. Wherein the magnetic rotor assembly comprises: the end face of the rotor is provided with a mounting hole; the stopper is arranged in the rotor and rotates synchronously with the rotor, the end face of the stopper is provided with a protrusion, the protrusion extends into the mounting hole, and one end of the protrusion penetrating through the mounting hole is provided with a stopping flange for preventing the protrusion from exiting the mounting hole. The utility model provides an electronic expansion valve among the prior art stopper serious problem of deformation when moulding plastics.

Description

Magnetic rotor assembly and electronic expansion valve

Technical Field

The utility model relates to the technical field of valves, particularly, relate to a magnetic rotor subassembly and electronic expansion valve.

Background

The magnetic rotor is a part made of a special material, is structurally unsuitable for being processed into an asymmetric shape, and in the fields of electromagnetic valves, electronic expansion valves and the like, because the magnetic rotor is inconvenient to be impacted, a stopper which is a component capable of being impacted and has a stopping function is usually installed through a connecting piece.

The existing processing technology of the electronic expansion valve usually adopts a mode of directly injecting magnetic steel outside a retainer to connect the retainer and the magnetic steel, but because the magnetic steel is injected, higher temperature and pressure can be generated, and because the retainer is mostly made of resin parts, the retainer is very easy to deform and seriously deforms during injection.

SUMMERY OF THE UTILITY MODEL

A primary object of the present invention is to provide a magnetic rotor assembly and an electronic expansion valve, which solves the problem of serious stopper deformation of the electronic expansion valve in the prior art.

In order to achieve the above object, according to an aspect of the present invention, there is provided a magnetic rotor assembly including: the end face of the rotor is provided with a mounting hole; the stopper is arranged in the rotor and rotates synchronously with the rotor, the end face of the stopper is provided with a protrusion, the protrusion extends into the mounting hole, and one end of the protrusion penetrating through the mounting hole is provided with a stopping flange for preventing the protrusion from exiting the mounting hole.

Further, the stop flange extends in a radial direction of the projection.

Further, the maximum diameter of the stop flange is larger than the diameter of the mounting hole.

Further, the mounting hole is eccentrically disposed with respect to the axis of the rotor.

Furthermore, the mounting holes and the protrusions are multiple and are arranged along the circumferential direction of the rotor, and each protrusion is correspondingly matched with one mounting hole.

Further, the rotor includes: the stopper is positioned in the inner cavity of the outer sleeve; the connecting plate is connected with the outer sleeve and provided with a mounting hole.

Furthermore, the inner wall of the outer sleeve is circumferentially provided with a ring groove, and the outer edge part of the connecting plate is embedded in the ring groove.

According to another aspect of the present invention, there is provided an electronic expansion valve, including: a valve seat assembly; the magnetic rotor assembly is rotatably arranged in the valve seat assembly; the nut is arranged in the valve seat assembly; the valve core assembly is arranged on the nut in a penetrating mode and is in threaded fit with the nut, the valve core assembly is connected with the magnetic rotor assembly and rotates synchronously with the magnetic rotor assembly, and the on-off state of the electronic expansion valve is controlled by changing the position relation between the valve core assembly and the valve seat assembly.

Further, the inner wall of the retainer of the magnetic rotor assembly is provided with a first stop boss, the outer wall of the nut is provided with a second stop boss, and the first stop boss can be in contact with the second stop boss for stopping so as to control the axial movement range of the valve core assembly.

Further, the end face of the stopper is provided with a release hole, and the release hole is aligned with the first stopper boss along the axial direction of the stopper.

Use the technical scheme of the utility model, through having seted up the mounting hole on the rotor, be provided with the arch on the dog, utilize cooperation between arch and the mounting hole to be connected dog and rotor, the turning force of rotor can drive the dog together through extrusion arch and rotate, thereby realize the two synchronous rotation, and in order to guarantee the reliability of being connected between rotor and the dog, avoid the dog to drop from the rotor, the one end of passing the mounting hole in the arch is provided with the backstop flange, the backstop flange can hinder protruding withdraw from the mounting hole, thereby the realization firmly fixes the dog on the rotor. The setting mode is on the basis of realizing reliable and stable connection of the retainer and the rotor, the whole process does not need to be subjected to injection molding, and the retainer cannot be greatly deformed, so that the shape stability of the retainer is ensured.

Drawings

The accompanying drawings, which form a part of the present application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:

FIG. 1 shows a schematic view of a magnetic rotor assembly of the present invention with a stop flange machined after the retainer is installed on the rotor;

FIG. 2 is a schematic view of the magnetic rotor assembly of FIG. 1 with the retainer initially installed on the rotor;

FIG. 3 shows a schematic view of the arrangement of the retainer of the magnetic rotor assembly of FIG. 2 when not mounted to the rotor;

FIG. 4 is a schematic view of the retainer of FIG. 3 from another perspective;

fig. 5 shows a schematic structural diagram of the electronic expansion valve of the present invention.

Wherein the figures include the following reference numerals:

10. a valve seat assembly; 20. a rotor; 21. mounting holes; 22. an outer sleeve; 23. a connecting plate; 30. a stopper; 31. a protrusion; 32. a stop flange; 33. a first stop boss; 34. demoulding holes; 40. a nut; 41. a second stop boss; 50. a valve core assembly; 60. and a guide sleeve.

Detailed Description

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

It is noted that, unless otherwise indicated, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

In the present application, where the contrary is not intended, the use of directional words such as "upper, lower, top and bottom" is generally with respect to the orientation shown in the drawings, or with respect to the component itself in the vertical, perpendicular or gravitational direction; likewise, for ease of understanding and description, "inner and outer" refer to the inner and outer relative to the profile of the components themselves, but the above directional words are not intended to limit the invention.

In order to solve the problem that the retainer deforms seriously when the electronic expansion valve in the prior art is injected, the utility model provides a magnetic rotor assembly and electronic expansion valve.

A magnetic rotor assembly as shown in fig. 1 to 4, comprising a rotor 20 and a stopper 30, wherein an end face of the rotor 20 is provided with a mounting hole 21; the stopper 30 is provided in the rotor 20 and rotates in synchronization with the rotor 20, an end surface of the stopper 30 has a protrusion 31, the protrusion 31 protrudes into the mounting hole 21, and an end of the protrusion 31 passing through the mounting hole 21 has a stopper flange 32 that blocks the protrusion 31 from exiting the mounting hole 21.

In the embodiment, the mounting hole 21 is formed on the rotor 20, the protrusion 31 is arranged on the stopper 30, the stopper 30 is connected with the rotor 20 by matching the protrusion 31 with the mounting hole 21, the rotating force of the rotor 20 drives the stopper 30 to rotate together by pressing the protrusion 31, so that the two synchronously rotate, in order to ensure the reliability of the connection between the rotor 20 and the stopper 30, the stopper 30 is prevented from falling off the rotor 20, the stopping flange 32 is arranged at one end of the protrusion 31 penetrating through the mounting hole 21, the stopping flange 32 can prevent the protrusion 31 from exiting from the mounting hole 21, and thus the stopper 30 is firmly fixed on the rotor 20. The above arrangement mode does not need to perform injection molding in the whole process on the basis of realizing reliable and stable connection of the stopper 30 and the rotor 20, and does not cause large deformation of the stopper 30, thereby ensuring stable shape of the stopper 30.

Preferably, the stop flange 32 extends in the radial direction of the protrusion 31, and the maximum diameter of the stop flange 32 is larger than the diameter of the mounting hole 21, for convenience of processing, the mounting hole 21 and the stop flange 32 are generally processed into a circular shape, that is, the diameter of the stop flange 32 is formed to be larger than the diameter of the mounting hole 21, so that the stop flange 32 can cover the whole mounting hole 21, so that the protrusion 31 cannot be removed from the mounting hole 21. Of course, the stop flange 32 may be machined in other shapes, such as a semi-circle, a rectangle, etc., as long as the distance between the two points on the stop flange 32 that are farthest from each other is ensured to be greater than the diameter of the mounting hole 21.

Note that the stopper flange 32 is not always present on the projection 31, but is processed during the process of mounting the stopper 30 on the rotor 20. Specifically, as shown in fig. 1 and 2, when the stopper 30 is not mounted on the rotor 20, the protrusion 31 is cylindrical and has no stopper flange 32, when the stopper 30 is mounted, the protrusion 31 is first inserted into the mounting hole 21 to primarily connect the stopper 30 and the rotor 20, then the end of the protrusion 31 of the stopper 30, which is inserted into the mounting hole 21, is ultrasonically welded or heat-staked, and contacts the surface of the protrusion 31 by a high-temperature object and is pressed downward, because the stopper 30 is a resin injection molded part, one end of the protrusion 31 is melted and softened, and at the same time, one end of the protrusion 31 is thickened by a downward pressure to form a mushroom-shaped spherical surface, i.e., the stopper flange 32 is formed, and the stopper flange 32 is tightly attached to the rotor 20 to prevent the stopper 30 from shaking relative to the rotor 20, and after the stopper flange 32 is cooled, a fixing effect can be.

In the present embodiment, since the protrusions 31 and the mounting holes 21 are both circular, in order to ensure the rotor 20 to rotate in synchronization with the stoppers 30, the mounting holes 21 are eccentrically disposed with respect to the axis of the rotor 20 to ensure the effect of the synchronous rotation, as shown in fig. 2. Of course, if the shapes of the projection 31 and the mounting hole 21 are not symmetrical circles but square, prismatic, or the like capable of transmitting torque, the projection 31 and the mounting hole 21 may be provided at the axis of the rotor 20.

Alternatively, the mounting holes 21 and the protrusions 31 are plural and arranged along the circumferential direction of the rotor 20, and each protrusion 31 is correspondingly matched with one mounting hole 21. The present embodiment is provided with three protrusions 31 and four mounting holes 21, the circumferential interval between the four mounting holes 21 is 90 degrees, two adjacent protrusions 31 are spaced by 90 degrees or 180 degrees, the three protrusions 31 are correspondingly matched with the three mounting holes 21, and the remaining one mounting hole 21 does not play a role. The reason why only three protrusions 31 are provided is that interference occurs between the protrusions 31 of the present embodiment and the demolding holes 34 of the stopper 30, and the demolding holes 34 need to be reserved in order to ensure the smooth proceeding of the demolding process of the stopper 30, so that the protrusions 31 at the positions of the demolding holes 34 are removed, and four mounting holes 21 are reserved for convenience of processing and mounting. Of course, the specific number and corresponding relationship of the protrusions 31 and the mounting holes 21 can be changed according to the actual situation.

Alternatively, part or all of the rotor 20 is made of a magnetic material, and the stopper 30 is made of a non-magnetic material, so that the magnetic rotor 20 can be rotated by the external coil, the non-magnetic stopper 30 is convenient to machine and connect, and the cost can be reduced, and the problem that the rotor 20 is not suitable for being impacted due to the reduced magnetism after being stressed is solved by integrating the non-magnetic material into the magnetic material.

In the present embodiment, the rotor 20 includes an outer sleeve 22 and a connecting plate 23, the stopper 30 is located in the inner cavity of the outer sleeve 22; the connecting plate 23 is connected to the outer sleeve 22, and the connecting plate 23 has a mounting hole 21 and a central hole through which the valve core assembly 50 of the electronic expansion valve passes.

Specifically, the outer sleeve 22 is a magnetic member, preferably a magnetic steel, a ring groove is formed in the side wall of the inner cavity, a circle of the ring groove is formed in the circumferential direction of the inner wall, the outer edge of the connecting plate 23 is embedded in the ring groove, the process can be completed through an injection molding process, and the connecting plate 23 and the outer sleeve 22 can be connected together to form the whole rotor 20. The mounting hole 21 is formed in the connecting plate 23, the thickness of the connecting plate 23 does not need to be too thick, and the processing difficulty of the mounting hole 21 is small.

The present embodiment further provides an electronic expansion valve, as shown in fig. 5, including a valve seat assembly 10, the above-mentioned magnetic rotor assembly, a nut 40 and a valve core assembly 50, wherein the magnetic rotor assembly is rotatably disposed in the valve seat assembly 10; nut 40 is disposed within seat assembly 10; the middle part of the outer sleeve 22 of the rotor 20 is provided with an inner cavity, the nut 40, the valve core assembly 50, the retainer 30 and other parts are all arranged or accommodated in the inner cavity in a penetrating way, and a central hole is arranged at the axis of the connecting plate 23, and the central hole is generally large and is used for the valve core assembly 50 to pass through so as to connect the valve core assembly 50 and the top block together; the valve core assembly 50 is arranged on the nut 40 in a penetrating mode and is in threaded fit with the nut 40, the valve core assembly 50 is connected with the magnetic rotor assembly and rotates synchronously with the magnetic rotor assembly, and the valve core assembly 50 controls the on-off state of the electronic expansion valve by changing the position relation between the valve core assembly 50 and the valve seat assembly 10.

In the present embodiment, the inner wall of the retainer 30 has a first stop boss 33, the outer wall of the nut 40 has a second stop boss 41, and the first stop boss 33 can contact the stop with the second stop boss 41 to control the axial movement range of the valve core assembly 50. The number of the first stopping bosses 33 and the second stopping bosses 41 can be set as required, two first stopping bosses 33 are provided in the embodiment, and are respectively located at two ends of the stopper 30 along the axial direction of the stopper 30, one second stopping boss 41 is provided, and the two first stopping bosses 33 are respectively matched with the second stopping bosses 41 to realize the limiting of the upper position and the lower position of the valve core assembly 50.

Because the stopper 30 of the embodiment has one open end and the other end shielded, the first stopping boss 33 far away from the open end can be integrally molded and injection-molded when the stopper 30 is processed, and the first stopping boss 33 near the open end needs to be processed again, and in the process, a demolding process needs to be performed, so in order to facilitate demolding, the end face of the shielded end of the stopper 30 is further provided with demolding holes 34, and the protrusion 31 is only provided with three demolding holes 34.

In this embodiment, the electronic expansion valve further includes a guiding sleeve 60, the valve seat assembly 10 includes three parts, namely an upper sleeve, a lower valve seat and a valve seat core, wherein the upper sleeve and the lower valve seat together form a valve cavity for accommodating the component, a through hole is respectively formed on a side surface and a bottom surface of the lower valve seat so as to be respectively communicated with the first connecting pipe and the second connecting pipe, a valve core seat is arranged at the through hole on the bottom surface, the valve core seat has a central through hole, the valve core assembly 50 is matched with the central through hole of the valve core seat so as to change the opening degree of the central through hole, thereby realizing the control of the electronic expansion valve, meanwhile, the guiding sleeve 60 is also sleeved on the outer side of the valve core seat so as to be connected with the valve core seat, a part of the nut 40 is also sleeved on the outer side of the guiding sleeve 60 and then is pressed and fixed by a pressing, the nut 40 is primarily used to effect axial movement of the cartridge assembly 50 and the guide sleeve 60 is primarily used to guide movement of the cartridge assembly 50 so that the cartridge assembly 50 moves axially along it without deflection.

In this embodiment, the valve core assembly 50 includes three parts, namely, a valve needle, a screw rod and a spring, wherein the outer side of the screw rod is provided with threads so as to be matched with the nut 40, the valve needle is arranged on the screw rod in a penetrating manner, one end of the valve needle is matched with the valve core seat to realize the on-off of the electronic expansion valve, the other end of the valve needle passes through the connecting plate 23 and then is connected with the top block and abuts against the end part of the screw rod, and the spring is arranged in the screw rod and sleeved outside the valve needle so as to.

It should be noted that the above-mentioned magnetic rotor assembly can be applied to an electronic expansion valve, and can also be applied to other devices and fields, in which the stopper 30 can be used to stop the rotor 20 from rotating, or can be used as a transmission carrier for the rotor 20 to drive other parts to rotate, so as to overcome the problem of insufficient transmission strength of the magnetic material, that is, the function of the stopper 30 is not limited to stopping, and it can also be used for transmission.

It should be noted that, a plurality in the above embodiments means at least two.

From the above description, it can be seen that the above-mentioned embodiments of the present invention achieve the following technical effects:

1. the problem that the retainer is seriously deformed when the electronic expansion valve in the prior art is subjected to injection molding is solved;

2. the stopper is connected with the rotor by matching between the protrusion and the mounting hole and realizes the rotation together;

3. the stop flange can block the protrusion from exiting the mounting hole, so that the retainer is firmly fixed on the rotor;

4. the whole process does not need injection molding, so that the retainer can not generate large deformation, and the shape stability of the retainer is ensured;

5. the problem that magnetism of the magnetic rotor is reduced after the magnetic rotor is stressed is solved by integrating the non-magnetic material into the magnetic material.

It is obvious that the above described embodiments are only some of the embodiments of the present invention, and not all of them. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts shall belong to the protection scope of the present invention.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular is intended to include the plural unless the context clearly dictates otherwise, and it should be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of features, steps, operations, devices, components, and/or combinations thereof.

It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are capable of operation in sequences other than those illustrated or described herein.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A magnetic rotor assembly, comprising:

the end face of the rotor (20) is provided with a mounting hole (21);

the stopper (30) is arranged in the rotor (20) and rotates synchronously with the rotor (20), the end face of the stopper (30) is provided with a protrusion (31), the protrusion (31) extends into the mounting hole (21), and one end of the protrusion (31) penetrating through the mounting hole (21) is provided with a stopping flange (32) for preventing the protrusion (31) from exiting the mounting hole (21).

2. A magnetic rotor assembly according to claim 1, characterized in that the stop flange (32) extends in the radial direction of the protrusion (31).

3. A magnetic rotor assembly according to claim 1, characterized in that the maximum diameter of the stop flange (32) is larger than the diameter of the mounting hole (21).

4. A magnetic rotor assembly according to claim 1, characterized in that the mounting hole (21) is eccentrically arranged with respect to the axis of the rotor (20).

5. A magnetic rotor assembly according to claim 1, wherein the mounting holes (21) and the protrusions (31) are plural and arranged along the circumferential direction of the rotor (20), and each of the protrusions (31) is correspondingly engaged with one of the mounting holes (21).

6. A magnetic rotor assembly according to claim 1, characterized in that the rotor (20) comprises:

an outer sleeve (22), the stopper (30) being located within an inner cavity of the outer sleeve (22);

a connecting plate (23), the connecting plate (23) being connected with the outer sleeve (22), the connecting plate (23) having the mounting hole (21).

7. A magnetic rotor assembly according to claim 6, characterized in that the inner wall of the outer sleeve (22) is circumferentially provided with a ring groove, and the outer edge portion of the connecting plate (23) is embedded in the ring groove.

8. An electronic expansion valve, comprising:

a valve seat assembly (10);

a magnetic rotor assembly as claimed in any one of claims 1 to 7, rotatably disposed within the valve seat assembly (10);

a nut (40), said nut (40) disposed within said seat assembly (10);

the valve core assembly (50) is arranged on the nut (40) in a penetrating mode and in threaded fit with the nut (40), the valve core assembly (50) is connected with the magnetic rotor assembly and rotates synchronously with the magnetic rotor assembly, and the valve core assembly (50) controls the on-off state of the electronic expansion valve by changing the position relation between the valve core assembly and the valve seat assembly (10).

9. The electronic expansion valve according to claim 8, wherein the inner wall of the stopper (30) of the magnetic rotor assembly has a first stop boss (33), the outer wall of the nut (40) has a second stop boss (41), and the first stop boss (33) is capable of stopping in contact with the second stop boss (41) to control the axial movement range of the valve core assembly (50).

10. An electronic expansion valve according to claim 9, wherein an end face of the stopper (30) is opened with a release hole (34), and the release hole (34) is aligned with the first stopper projection (33) in an axial direction of the stopper (30).