CN220168575U

CN220168575U - Connection structure of valve rod and needle and electronic expansion valve

Info

Publication number: CN220168575U
Application number: CN202320820641.6U
Authority: CN
Inventors: 姜林; 胡绍文; 刘寅春; 谭光辉
Original assignee: Yapp Automotive Parts Kaifeng Co ltd
Current assignee: Yapp Automotive Parts Kaifeng Co ltd
Priority date: 2023-04-13
Filing date: 2023-04-13
Publication date: 2023-12-12
Anticipated expiration: 2033-04-13

Abstract

The utility model discloses a connecting structure of a valve rod and a valve needle and an electronic expansion valve, and relates to the technical field of electronic expansion valves. The connecting structure of valve rod and needle includes needle, valve rod, has seted up the floating groove on one of valve needle and the valve rod, and the oral area in floating groove is equipped with spacing shoulder, is fixed with the stopper on another, and the stopper is located the floating inslot, has seted up the inside and outside assembly groove in intercommunication floating groove on the lateral wall in floating groove, and the assembly groove is used for installing the stopper in the floating groove. The electronic expansion valve comprises a shell, a positioning seat, a valve core seat, a valve rod, a valve needle, a nut, a coil, a track assembly and a magnetic rotor. The utility model solves the technical problems of complex structure, multiple parts and high manufacturing cost of the electronic expansion valve in the prior art.

Description

Connection structure of valve rod and needle and electronic expansion valve

Technical Field

The utility model belongs to the technical field of electronic expansion valves, and particularly relates to a connecting structure of a valve rod and a valve needle and an electronic expansion valve.

Background

In various refrigeration and heating equipment in the market today, an electronic expansion valve is generally adopted to regulate the flow of fluid. In order to accurately and quickly regulate the flow of fluid in the existing automobile thermal management system, electronic expansion valves are increasingly used. The electronic expansion valve is generally composed of a valve seat assembly, a valve needle assembly, a driving assembly and the like, and the valve rod and the valve needle are driven by a stepping motor to axially move to adjust the opening of the valve port, so that the flow is controlled.

For example, chinese patent publication No. CN113728185B, publication No. 2022, 9, 20 discloses an electronic expansion valve comprising a needle screw assembly comprising a needle, a needle cover, a washer portion, a spring, and a screw assembly; the screw rod assembly comprises a lower stop part, a valve needle supporting part and an upper stop part, wherein the lower stop part comprises a lower flange part or a body part, and the lower flange part or the body part can be propped against the gasket part; the valve needle supporting part comprises a valve needle supporting gasket or a suspension clamping part or a shaft sleeve gasket, and the valve needle supporting gasket or the suspension clamping part or the shaft sleeve gasket can be propped against the matching part of the valve needle sleeve; the upper stop part comprises an upper flange part or an upper check ring, and the upper flange part or the upper check ring is propped against the spring.

In the technical scheme, the valve needle is hung on the screw rod assembly through the valve needle sleeve, so that the valve needle and the screw rod can relatively displace and cannot be separated from each other. But among the above-mentioned technical scheme, the connection structure of needle and wire rod has used a large amount of parts, and similar overall structure becomes complicated, and processing cost is higher, and the installation is loaded down with trivial details, installation inefficiency.

Disclosure of Invention

The utility model aims to provide a connecting structure of a valve rod and a valve needle, which aims to solve the technical problems of complex connecting structure of the valve rod and the valve needle, multiple parts and high manufacturing cost in the prior art.

The utility model aims to provide an electronic expansion valve, which solves the technical problems of complex structure, multiple parts and high manufacturing cost of the electronic expansion valve in the prior art.

In order to achieve the above purpose, the technical scheme of the connecting structure of the valve rod and the valve needle provided by the utility model is as follows:

the utility model provides a connection structure of valve rod and needle, includes needle, valve rod, set up the floating groove on one of needle and the valve rod, the oral area in floating groove is equipped with spacing shoulder, is fixed with the stopper on the other, the stopper is located the floating groove, set up the inside and outside assembly groove in intercommunication floating groove on the lateral wall in floating groove, the assembly groove is used for installing the stopper in the floating groove.

The beneficial effects are that: the solution is a further improvement of the prior art. In this scheme stopper receives the joint limiting action of floating groove and spacing shoulder in floating groove, makes valve rod and needle can take place the relative displacement of small amplitude and can't break away from each other, because the stopper can be installed floating inslot through the assembly groove, consequently spacing shoulder can not need with floating groove separation alright accomplish the assembly, the valve rod is higher with the wholeness of needle, has simplified the structure, has reduced manufacturing cost to be convenient for assemble and use.

As a further improvement, the floating groove is arranged on the valve needle, and the limiting block is arranged on the valve rod.

The beneficial effects are that: is convenient for production, manufacture and assembly.

As a further improvement, the limit shoulder is integrally formed with the valve needle.

The beneficial effects are that: the parts used for connecting the valve needle and the valve rod can be further reduced, and the manufacturing cost is reduced.

As a further improvement, the limiting block is of a revolving body structure.

The beneficial effects are that: the limiting block can conveniently rotate in the floating groove.

In order to achieve the above purpose, the technical scheme of the electronic expansion valve provided by the utility model is as follows:

the utility model provides an electronic expansion valve, includes needle, valve rod, set up the floating groove on one of needle and the valve rod, the oral area in floating groove is equipped with spacing shoulder, is fixed with the stopper on the other, the stopper is located the floating inslot, characterized by, set up the inside and outside assembly groove in intercommunication floating groove on the lateral wall in floating groove, the assembly groove is used for installing the stopper in the floating groove.

The beneficial effects are that: the number of parts of the electronic expansion valve can be reduced, the production cost is reduced, and the assembly efficiency is improved.

The beneficial effects are that: is convenient for production, manufacture, installation and use.

The beneficial effects are that: the number of parts of the electronic expansion valve can be effectively reduced, and the electronic expansion valve is convenient to manufacture.

As a further improvement, the limiting block is of a revolving body structure.

Drawings

FIG. 1 is a schematic view of the structure of an embodiment 1 of the connecting structure of a valve rod and a valve needle in the present utility model;

fig. 2 is a schematic structural view showing the fitting relationship between the valve needle and the valve stem in embodiment 1 of the connecting structure of the valve stem and the valve needle in the present utility model.

Reference numerals illustrate:

1. a valve stem; 2. a valve needle; 3. a limiting block; 4. a floating tank; 5. a limit shoulder; 6. a convex edge; 7. a spring; 8. an assembly groove; 9. a coil; 10. a track assembly; 11. a connecting plate; 12. a housing; 13. a positioning seat; 14. a valve core seat; 15. a sliding channel; 16. a first valve hole; 17. a second valve hole; 18. a nut; 19. a magnetic rotor.

Detailed Description

The present utility model will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present utility model more apparent. It should be understood that the particular embodiments described herein are illustrative only and are not intended to limit the utility model, i.e., the embodiments described are merely some, but not all, of the embodiments of the utility model. The components of the embodiments of the present utility model generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

The present utility model is described in further detail below with reference to examples.

The utility model provides a specific embodiment 1 of a connecting structure of a valve rod and a valve needle, which comprises the following steps:

the utility model provides a connection structure of valve rod and needle, see fig. 1, including valve rod 1 and needle 2, the one end integrated into one piece of valve rod 1 has cylinder structure's stopper 3. In other embodiments, the stopper 3 may be formed as a sphere to reduce friction. The diameter of the limiting block 3 is larger than that of the valve rod 1. The root of the valve needle 2 is provided with a floating groove 4, the cross section of the floating groove 4 is circular, the mouth of the floating groove 4 is provided with an annular limiting shoulder 5, the limiting shoulder 5 and the valve needle 2 are integrally formed, and the limiting shoulder 5 and the wall of the floating groove 4 form limiting blocks.

The valve rod 1 is arranged in the central hole of the limiting shoulder 5 in a penetrating way, the limiting block 3 is positioned in the floating groove 4, and the diameter of the limiting block 3 is larger than that of the central hole of the limiting shoulder 5, so that the limiting block 3 can move in the floating groove 4 along the axial direction of the floating groove 4 and cannot be separated from the floating groove 4.

The middle part shaping of valve rod 1 has protruding edge 6, and the cover has spring 7 on the valve rod 1, and the one end and the protruding edge 6 butt of spring 7, the other end and the spacing shoulder 5 butt of spring 7.

Referring to fig. 2, an assembly groove 8 is formed in the side wall of the valve needle 2, the assembly groove 8 is communicated with the floating groove 4, and the valve rod 1 and the limiting block 3 can be installed in the floating groove 4 through the assembly groove 8.

Because stopper 3 and valve rod 1 can be installed in the floating groove 4 through mounting groove 8, consequently spacing shoulder 5 can not need to separate with needle 2 to with spacing shoulder 5 and the whole processing of needle 2, stopper 3 also can be with the whole processing of valve rod 1 simultaneously, can a large amount of reduction part quantity, simplify connection structure, reduction in manufacturing cost improves assembly efficiency.

Compared with the embodiment 1, the specific embodiment 2 of the connecting structure of the valve rod and the valve needle provided by the utility model is different in that: in the embodiment, the floating groove is formed in the end part of the valve rod, the root part of the valve needle is provided with the connecting rod, and the limiting block is fixedly connected to one end of the connecting rod, which is far away from the valve needle.

The utility model provides a specific embodiment 1 of an electronic expansion valve, which comprises the following components:

an electronic expansion valve comprises a shell 12, a positioning seat 13, a valve core seat 14, a valve rod 1, a valve needle 2, a nut 18, a coil 9, a track assembly 10 and a magnetic rotor 19.

The shell is of a cylindrical structure with one end open, the positioning seat 13 is fixedly arranged at the opening part of the shell 12, and the valve core seat 14 is fixedly connected with the positioning seat 13. The end of the valve core seat 14 connected with the positioning seat 13 is provided with a sliding channel 15, and the valve needle 2 is positioned in the sliding channel 15 and is in sliding fit with the sliding channel 15. The end of the valve core seat 14 away from the positioning seat 13 is provided with a first valve hole 16 communicated with the sliding channel 15, the side wall of the valve core seat 14 is provided with a second valve hole 17 communicated with the sliding channel 15, and the first valve hole 16 and the second valve hole 17 are inflow or outflow channels of fluid.

The nut 18 is located in the housing 12, and one end of the nut 18 is fixedly connected with the positioning seat 13, so that the nut 18 is communicated with the sliding channel 15. The nut 18 is provided with internal threads, the valve rod 1 is provided with external threads, and the valve rod 1 is in threaded fit with the nut 18. The magnetic rotor 19 is arranged in the shell 12, the magnetic rotor 19 is of a cylindrical structure, the connecting plate 11 is fixedly arranged on the magnetic rotor 19, the connecting plate 11 is of a circular structure, and the valve rod 1 is fixedly connected with the center of the connecting plate 11 in a welding mode.

The track assembly 10 includes a sliding ring and a spiral guide rail, and the structure of the track assembly 10 is the same as that of the prior art, and will not be described in detail herein.

The coil 9 is located outside the housing 12 and fixedly connected with the housing, the coil 9 and the magnetic rotor 19 together form a stepping motor, and the magnetic rotor 19 can rotate in the housing 12 after the coil 9 is energized.

In this embodiment, the valve rod 1 and the valve needle 2 are connected in a floating manner, and the specific connection structure is the same as that in the specific embodiment 1 of the connection structure of the valve rod and the valve needle provided by the utility model.

After the stopper 3 is mounted in the floating groove 4 through the mounting groove 8, the valve needle 2 slides in the sliding passage 15, and the sliding passage 15 can prevent the stopper 3 from being separated from the mounting groove 8, so that the valve needle has high stability. The structure can effectively reduce the number of parts of the electronic expansion valve and reduce the manufacturing cost.

Compared with the embodiment 1, the embodiment 2 of the electronic expansion valve provided by the utility model is different in that: in this embodiment, the specific connection structure of the valve rod 1 and the valve needle 2 is the same as that of the specific embodiment 2 of the connection structure of the valve rod and the valve needle provided by the utility model.

It should be noted that the above-mentioned embodiments are merely preferred embodiments of the present utility model, and the present utility model is not limited to the above-mentioned embodiments, but may be modified without inventive effort or equivalent substitution of some of the technical features thereof by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

Claims

1. The utility model provides a connection structure of valve rod and needle, includes needle, valve rod, set up the floating groove on one of needle and the valve rod, the oral area in floating groove is equipped with spacing shoulder, is fixed with the stopper on the other, the stopper is located the floating inslot, characterized by, set up the inside and outside assembly groove in intercommunication floating groove on the lateral wall in floating groove, the assembly groove is used for installing the stopper in the floating groove.

2. The valve stem and valve needle connecting structure according to claim 1, wherein the floating groove is formed in the valve needle, and the stopper is formed in the valve stem.

3. The valve stem and needle connection of claim 2, wherein the stop shoulder is integrally formed with the needle.

4. The connecting structure of the valve rod and the valve needle according to claim 1, wherein the limiting block is a revolving body structure.

5. The utility model provides an electronic expansion valve, includes needle, valve rod, set up the floating groove on one of needle and the valve rod, the oral area in floating groove is equipped with spacing shoulder, is fixed with the stopper on the other, the stopper is located the floating inslot, characterized by, set up the inside and outside assembly groove in intercommunication floating groove on the lateral wall in floating groove, the assembly groove is used for installing the stopper in the floating groove.

6. The electronic expansion valve of claim 5, wherein the float groove is disposed on the valve needle and the stop block is disposed on the valve stem.

7. The electronic expansion valve of claim 6, wherein the stop shoulder is integrally formed with the valve needle.

8. The electronic expansion valve of claim 5, wherein the stopper is a solid of revolution structure.