CN217177429U

CN217177429U - Electronic expansion valve

Info

Publication number: CN217177429U
Application number: CN202220482293.1U
Authority: CN
Inventors: 詹少军; 陈灿锋
Original assignee: Zhejiang Dunan Artificial Environment Co Ltd
Current assignee: Zhejiang Dunan Artificial Environment Co Ltd
Priority date: 2022-03-04
Filing date: 2022-03-04
Publication date: 2022-08-12
Anticipated expiration: 2032-03-04

Abstract

The utility model provides an electronic expansion valve, include: the nut assembly comprises a nut and a connecting plate sleeved on the nut, the nut is provided with a positioning hole, and a stop surface is arranged in the positioning hole; the valve body assembly comprises a valve body and a guide sleeve arranged in a cavity of the valve body, one end of the guide sleeve penetrates into the positioning hole, the end face and the stop face of the guide sleeve are abutted, the outer side wall of the connecting plate is connected with the valve body, and the connecting plate and the valve body are in axial clearance fit with each other at the nut. By adopting the scheme, in the installation process of the nut assembly, when the guide sleeve is abutted against the stop surface, a gap is formed between the connecting plate and the valve body in the axial direction of the nut, the condition that the nut assembly is positioned too much or the nut assembly is positioned inaccurately in the related technology is avoided, the installation precision of the nut assembly in the electronic expansion valve is improved, the reliability of positioning the nut assembly through the abutting of the guide sleeve and the stop surface is ensured, and the reliability of the electronic expansion valve is further improved.

Description

Electronic expansion valve

Technical Field

The utility model relates to an electronic expansion valve technical field particularly, relates to an electronic expansion valve.

Background

In the assembly of the electronic expansion valve between the nut assembly and the valve body in the related art, the mounting position of the nut is mainly positioned by the abutting of the stop surface in the positioning hole of the nut and the guide sleeve in the valve body, but in the mounting process of the nut assembly, the situation that the nut assembly is not accurately positioned due to the fact that the stop surface and the guide sleeve are not abutted when the connecting plate and the valve body are abutted in the axial direction of the nut can occur, or the stop surface and the guide sleeve are also abutted when the connecting plate and the valve body are abutted in the axial direction of the nut, the situation that the nut assembly is over-positioned is caused, and the mounting precision and the reliability of the electronic expansion valve are influenced.

SUMMERY OF THE UTILITY MODEL

The utility model provides an electronic expansion valve to solve the inaccurate or problem of crossing the location of nut component location among the correlation technique.

In order to solve the above problem, the utility model provides an electronic expansion valve, include: the nut assembly comprises a nut and a connecting plate sleeved on the nut, the nut is provided with a positioning hole, and a stop surface is arranged in the positioning hole; the valve body assembly comprises a valve body and a guide sleeve arranged in a cavity of the valve body, one end of the guide sleeve penetrates into the positioning hole, the end face and the stop face of the guide sleeve are abutted, the outer side wall of the connecting plate is connected with the valve body, and the connecting plate and the valve body are in axial clearance fit with each other at the nut.

Further, the inside wall of valve body has the first step face that is on a parallel with the nut axis and the second step face that is perpendicular to the nut axis, and first step face and second step face form the stair structure, and the lateral wall and the first step face of connecting plate are connected, have clearance t1 between connecting plate and the second step face.

Further, t1 is more than or equal to 0.2 mm.

Furthermore, the thickness of the connecting plate is t2, and t1 is less than or equal to 0.3t 2.

Further, the valve body includes valve gap and disk seat, and the one end of disk seat penetrates the valve gap, and at least a part of nut is located the cavity of valve gap, and the uide bushing setting is in the cavity of disk seat, and the stair structure is located the one end of disk seat towards the valve gap.

Furthermore, one part of the connecting plate is positioned in the stepped structure, the other part of the connecting plate is positioned outside the stepped structure, and the connecting plate is welded with the valve seat.

Furthermore, the valve seat comprises a seat body and a valve port part which are connected with each other, the seat body is connected with the valve cover, the valve port part is provided with a positioning boss, and the positioning boss penetrates into one end of the guide sleeve, which is far away from the nut.

Furthermore, the positioning boss is in interference fit with the guide sleeve, and the guide sleeve is in interference fit with the positioning hole.

Further, the nut includes interconnect's nut main part and limiting plate, and the radial dimension of limiting plate is greater than the radial dimension of nut main part, and the connecting plate cover is established on the outer peripheral face of nut main part, and connecting plate and limiting plate butt, connecting plate and uide bushing are spacing to the nut in two directions of nut axis respectively.

Further, the connecting plate and the nut are detachably connected.

Use the technical scheme of the utility model, a electronic expansion valve is provided, include: the nut assembly comprises a nut and a connecting plate sleeved on the nut, the nut is provided with a positioning hole, and a stop surface is arranged in the positioning hole; the valve body assembly comprises a valve body and a guide sleeve arranged in a cavity of the valve body, one end of the guide sleeve penetrates into the positioning hole, the end face and the stop face of the guide sleeve are abutted, the outer side wall of the connecting plate is connected with the valve body, and the connecting plate and the valve body are in axial clearance fit with each other at the nut. Adopt this scheme, at nut component in the installation, when uide bushing and backstop face butt, connecting plate and valve body are gapped in the axial of nut, when uide bushing and backstop face butt in having avoided among the correlation technique, connecting plate and valve body also butt in the axial of nut, lead to the condition of nut component oversositioning, also avoided connecting plate and valve body earlier butt in the axial of nut simultaneously, uide bushing and backstop face do not butt, lead to the inaccurate condition of nut component location, thereby the reliability of nut component location is guaranteed to the installation accuracy of nut component in the electronic expansion valve through uide bushing and backstop face butt, and then electronic expansion valve reliability has been improved.

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 is a schematic structural diagram of an electronic expansion valve according to an embodiment of the present invention;

FIG. 2 shows an enlarged view of a selected position A in the electronic expansion valve of FIG. 1;

FIG. 3 shows an enlarged view of a selected location B in the electronic expansion valve of FIG. 1;

fig. 4 is a schematic view showing a structure of a nut in the electronic expansion valve of fig. 1.

Wherein the figures include the following reference numerals:

10. a nut assembly; 11. a nut; 111. positioning holes; 112. a stop surface; 113. a nut body; 114. a limiting plate; 12. a connecting plate;

21. a valve body; 211. a first step surface; 212. a second step surface; 213. a valve cover; 214. a valve seat; 2141. a base body; 2142. a valve port member; 2143. positioning the boss; 22. and a guide sleeve.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. It is to be understood that the embodiments described are only some embodiments of the invention, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

As shown in fig. 1 to 4, an embodiment of the present invention provides an electronic expansion valve, including: the nut component 10, the nut component 10 includes a nut 11 and a connecting plate 12 sleeved on the nut 11, the nut 11 has a positioning hole 111, and a stop surface 112 is arranged in the positioning hole 111; the valve body assembly comprises a valve body 21 and a guide sleeve 22 arranged in a cavity of the valve body 21, one end of the guide sleeve 22 penetrates into the positioning hole 111, the end face of the guide sleeve 22 is abutted to the stop face 112, the outer side wall of the connecting plate 12 is connected with the valve body 21, and the connecting plate 12 is in axial clearance fit with the valve body 21 at the nut 11.

In this embodiment, in the installation process of the nut assembly 10, when the guide sleeve 22 abuts against the stop surface 112, there is a gap between the connecting plate 12 and the valve body 21 in the axial direction of the nut, which avoids the situation that the nut assembly is over-positioned due to the fact that the connecting plate and the valve body also abut against each other in the axial direction of the nut when the guide sleeve abuts against the stop surface in the related art, and also avoids the situation that the connecting plate and the valve body abut against each other in the axial direction of the nut in the related art, and the guide sleeve does not abut against the stop surface, which results in inaccurate positioning of the nut assembly, and improves the installation accuracy of the nut assembly 10 in the electronic expansion valve, thereby ensuring the reliability of positioning of the nut assembly 10 due to the abutment of the guide sleeve 22 and the stop surface 112, and further improving the reliability of the electronic expansion valve.

Specifically, with this arrangement, the sizes of the nut assembly 10 and the valve body 21 in the electronic expansion valve can be reduced as much as possible, and the electronic expansion valve can be miniaturized as much as possible.

As shown in fig. 2, the inner side wall of the valve body 21 has a first step surface 211 parallel to the axis of the nut 11 and a second step surface 212 perpendicular to the axis of the nut 11, the first step surface 211 and the second step surface 212 form a stepped structure, the outer side wall of the connecting plate 12 is connected to the first step surface 211, and a gap t1 is provided between the connecting plate 12 and the second step surface 212. By means of the arrangement, the connecting plate 12 can be positioned and installed through the step structure, and assembly is facilitated.

Specifically, t1 is more than or equal to 0.2 mm. In the embodiment, the situation that if t1 is too small, the stop surface 112 presses the guide sleeve 22 to make the abutted plane slightly move towards the guide sleeve 22, so that the gap amount of t1 is covered, the nut assembly 10 is positioned too much due to the abutment of the connecting plate 12 and the valve body 21 is avoided, and the reliability of the positioning of the nut assembly 10 abutted by the guide sleeve 22 and the stop surface 112 is ensured.

Further, the thickness of the connecting plate 12 is t2, and t1 is less than or equal to 0.3t 2. With the adoption of the arrangement, the condition that if t1 is too large, the outer side wall of the connecting plate 12 cannot be connected with the valve body 21 is avoided, and the reliability of the connection between the nut component 10 and the valve body 21 is ensured while the positioning reliability of the nut component 10 is ensured.

As shown in fig. 3, the valve body 21 includes a valve cover 213 and a valve seat 214, one end of the valve seat 214 penetrates the valve cover 213, at least a portion of the nut 11 is located in a cavity of the valve cover 213, the guide sleeve 22 is disposed in the cavity of the valve seat 214, and the stepped structure is located at one end of the valve seat 214 facing the valve cover 213. By the arrangement, the processing and forming of the step structure are facilitated, and meanwhile, the split processing and forming and connection of the valve cover 213 and the valve seat 214 are facilitated, so that the production efficiency of the electronic expansion valve is improved.

As shown in FIG. 2, a portion of the web 12 is located within the stepped configuration and another portion of the web 12 is located outside the stepped configuration, with the web 12 and the valve seat 214 being welded together. In the present embodiment, the first step surface 211 and the end surface of the valve seat 214 facing the valve cover 213 are connected, and the welding position of the connecting plate 12 and the valve seat 214 is a position of a line of contact formed between a plane where the connecting plate 12 does not abut against the first step surface 211 (i.e., an outer side wall of a portion where the connecting plate 12 is not located within the stepped structure) and the end surface of the valve seat 214 connected to the first step surface 211. By means of the arrangement, welding allowance is reserved for welding the connecting plate 12 and the valve seat 214, and reliability of welding of the connecting plate 12 and the valve seat 214 is guaranteed.

Specifically, the upper limit range of t1 is limited, the situation that if t1 is too large, the outer side wall of the connecting plate 12 is completely higher than the step structure, so that the outer side wall of the connecting plate 12 cannot be connected with the valve body 21 is avoided, and the reliability of positioning of the nut component 10 is guaranteed while the reliability of connection between the nut component 10 and the valve body 21 is guaranteed.

As shown in fig. 3, the valve seat 214 includes a seat body 2141 and a valve port 2142 connected to each other, the seat body 2141 is connected to the valve cover 213, the valve port 2142 has a positioning protrusion 2143, and the positioning protrusion 2143 penetrates into an end of the guide sleeve 22 away from the nut 11. By the arrangement, the mounting position of the guide sleeve 22 is positioned and mounted through the valve port part 2142, the coaxiality of the guide sleeve 22 and the seat body 2141 is ensured, and further the coaxiality of the nut component 10 and the seat body 2141 is ensured, specifically, the seat body 2141 is provided with the valve port, the axis of the seat body 2141 penetrates through the center of the valve port, and through the arrangement, the coaxiality of the nut component 10 and the valve port is ensured, and the reliability of the electronic expansion valve is ensured.

Specifically, the positioning boss 2143 and the guide sleeve 22 are in interference fit, and the guide sleeve 22 and the positioning hole 111 are in interference fit. By the arrangement, the connection reliability of the guide sleeve 22, the nut 11 and the valve seat 214 is ensured, the condition that the coaxiality is deviated due to play of any one of the three after connection is prevented, and the reliability of the electronic expansion valve is ensured.

As shown in fig. 4, the nut 11 includes a nut main body 113 and a limit plate 114 connected to each other, the radial dimension of the limit plate 114 is greater than the radial dimension of the nut main body 113, the connection plate 12 is fitted over the outer circumferential surface of the nut main body 113, the connection plate 12 abuts against the limit plate 114, and the connection plate 12 and the guide sleeve 22 respectively limit the nut 11 in two directions of the axis of the nut 11.

In this embodiment, the guide sleeve 22 limits the downward movement of the nut 11 along the axial direction, and the connection between the connecting plate 12 and the valve body 21 limits the upward movement of the nut 11 along the axial direction, so as to prevent the nut 11 from moving up and down after the installation is completed, thereby ensuring the reliability of the electronic expansion valve.

Specifically, the connecting plate 12 and the nut 11 are detachably connected. With the adoption of the arrangement, the situation that the connecting plate 12 needs to be put in when the insert injection molding is carried out on the nut assembly 10 in the prior art is avoided, the production efficiency is improved, and meanwhile, the situation that the nut body with the connecting plate cannot be used for secondary material return is avoided, so that the nut body 113 can be used for secondary material return better. Due to the arrangement, the situation that the nut component is damaged due to the fact that more burrs exist at the connecting position of the connecting plate and the nut main body when the nut component is subjected to insert injection molding in the prior art is avoided, and the structural strength of the nut component 10 is improved.

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. An electronic expansion valve, comprising:

the nut component (10) comprises a nut (11) and a connecting plate (12) sleeved on the nut (11), the nut (11) is provided with a positioning hole (111), and a stop surface (112) is arranged in the positioning hole (111);

the valve body subassembly, the valve body subassembly includes valve body (21) and sets up uide bushing (22) in the cavity of valve body (21), the one end of uide bushing (22) penetrates locating hole (111), the terminal surface of uide bushing (22) with backstop face (112) butt, the lateral wall of connecting plate (12) with valve body (21) are connected, connecting plate (12) with valve body (21) are in the axial clearance fit of nut (11).

2. The electronic expansion valve according to claim 1, wherein the inner side wall of the valve body (21) has a first step surface (211) parallel to the axis of the nut (11) and a second step surface (212) perpendicular to the axis of the nut (11), the first step surface (211) and the second step surface (212) form a stepped structure, the outer side wall of the connecting plate (12) is connected with the first step surface (211), and a gap t1 is provided between the connecting plate (12) and the second step surface (212).

3. An electronic expansion valve according to claim 2, wherein t1 is 0.2mm or more.

4. An electronic expansion valve according to claim 2, wherein the thickness of the connection plate (12) is t2, t1 ≤ 0.3t 2.

5. An electronic expansion valve according to claim 2, wherein the valve body (21) comprises a valve cover (213) and a valve seat (214), one end of the valve seat (214) penetrates the valve cover (213), at least a part of the nut (11) is located in a cavity of the valve cover (213), the guide sleeve (22) is arranged in the cavity of the valve seat (214), and the step structure is located at an end of the valve seat (214) facing the valve cover (213).

6. An electronic expansion valve according to claim 5, wherein a part of the connection plate (12) is located inside the stepped structure and another part of the connection plate (12) is located outside the stepped structure, the connection plate (12) and the valve seat (214) being welded.

7. The electronic expansion valve according to claim 5, wherein the valve seat (214) comprises a seat body (2141) and a valve port member (2142) connected to each other, the seat body (2141) and the valve cap (213) are connected, the valve port member (2142) has a positioning boss (2143), and the positioning boss (2143) penetrates into an end of the guide sleeve (22) away from the nut (11).

8. The electronic expansion valve according to claim 7, wherein the positioning boss (2143) and the guide sleeve (22) are in interference fit, and the guide sleeve (22) and the positioning hole (111) are in interference fit.

9. An electronic expansion valve according to claim 1, wherein the nut (11) comprises a nut body (113) and a limiting plate (114) connected to each other, the radial dimension of the limiting plate (114) is larger than the radial dimension of the nut body (113), the connecting plate (12) is sleeved on the outer circumferential surface of the nut body (113), the connecting plate (12) and the limiting plate (114) are abutted, and the connecting plate (12) and the guide sleeve (22) respectively limit the nut (11) in two directions of the axis of the nut (11).

10. An electronic expansion valve according to claim 1, wherein the connection plate (12) and the nut (11) are detachably connected.