CN214368083U - Nut connection structure of high reliability - Google Patents
Nut connection structure of high reliability Download PDFInfo
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- CN214368083U CN214368083U CN202120521685.XU CN202120521685U CN214368083U CN 214368083 U CN214368083 U CN 214368083U CN 202120521685 U CN202120521685 U CN 202120521685U CN 214368083 U CN214368083 U CN 214368083U
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- nut
- connecting plate
- nut connecting
- circular groove
- groove
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Abstract
The utility model relates to the technical field of electronic expansion valves, and discloses a nut connecting structure with high reliability, which comprises an injection molded nut body and a punch-formed nut connecting plate; the outer side wall of the nut body is provided with an annular groove, the nut connecting plate is fixedly matched in the annular groove, and the outer diameter of the nut connecting plate is larger than that of the nut body; a valve seat of the electronic expansion valve is provided with a first circular groove which is in interference fit with the nut body; the valve seat is further provided with a second circular groove, the inner diameter of the second circular groove is larger than that of the first circular groove, an inner step surface is formed between the second circular groove and the first circular groove, a matching groove used for correspondingly accommodating the nut connecting plate is formed in the inner step surface, and the depth of the matching groove is the same as the thickness of the nut connecting plate. In this way, the utility model discloses can be through changing the nut structure, become its combination of punching press piece and injection molding, improve the reliability of screw thread pair to improve the reliability of product.
Description
Technical Field
The utility model relates to an electronic expansion valve technical field especially relates to a nut connection structure of high reliability.
Background
The existing electronic expansion valve is generally controlled by a stepping motor to regulate the flow of a refrigerant, and comprises a driver (the stepping motor), an actuating mechanism (a thread pair), a throttling mechanism (a valve needle valve port) and related auxiliary mechanisms. The stator coil of the stepping motor receives a pulse signal provided by the controller to drive the rotor magnetic ring to rotate, and the rotor magnetic ring (integrated with the mandrel screw) rotates to drive the valve needle (integrated with the mandrel screw) to move up and down axially, so that the through-flow sectional areas of the valve needle and the valve port are controlled to adjust the refrigerating capacity, and the efficiency of the evaporator is matched. After the electronic expansion valve is connected to a refrigerating system, refrigerant enters the electronic expansion valve from the inlet of the valve body, enters the valve port through the valve seat flow channel and finally enters the outlet of the valve body from the through-flow section formed by the valve needle and the valve port. The nut of the electronic expansion valve is generally fixedly connected with the valve seat, the spindle screw moves up and down while rotating, and the nut is a machined part and is fixed with the valve seat into a whole through interference crimping.
The existing electronic expansion valve nut is a bronze machined part, and the spindle screw is a stainless steel machined part, so that two parts of the transmission thread pair are both metal machined parts, and the wear-resisting reliability of the thread pair is not high; in addition, the relationship between the press-in force of the nut and the valve seat, the interference magnitude between the press-in force and the valve seat and the processing quality of a matching surface is large, the press-in force is not easy to control, and the cost of parts of a product is high.
SUMMERY OF THE UTILITY MODEL
The utility model discloses the main technical problem who solves provides a nut connection structure of high reliability, can become its combination of punching press piece and injection molding through changing the nut structure, improves the reliability of screw thread pair to improve the reliability of product.
In order to solve the technical problem, the utility model discloses a technical scheme be: the nut connecting structure with high reliability is provided and is applied to an electronic expansion valve; the nut connection structure includes: the nut connecting plate comprises a nut body formed by injection molding and a nut connecting plate formed by punch forming; the outer side wall of the nut body is provided with an annular groove, the nut connecting plate is annular, the nut connecting plate is fixedly matched in the annular groove, and the outer diameter of the nut connecting plate is larger than that of the nut body; a valve seat of the electronic expansion valve is provided with a first circular groove which is in interference fit with the nut body; the valve seat is further provided with a second circular groove, the inner diameter of the second circular groove is larger than that of the first circular groove, an inner step surface is formed between the second circular groove and the first circular groove, a matching groove used for correspondingly containing the nut connecting plate is formed in the inner step surface, and the depth of the matching groove is the same as the thickness of the nut connecting plate.
Preferably, the outer side wall of the nut connecting plate is provided with a flow passing notch which is used for being correspondingly communicated with the flow passing hole in the valve seat.
Preferably, the number of the overflowing notches is multiple, and the overflowing notches are uniformly distributed around the axis of the nut connecting plate; one of the plurality of flow notches is aligned with the flow aperture.
Preferably, a plurality of injection molding connecting gaps are formed in the inner side wall of the nut connecting plate, and the plurality of injection molding connecting gaps are uniformly distributed around the axis of the nut connecting plate.
Preferably, the position of the injection molding connecting notch on the nut connecting plate is staggered with the position of the overflowing notch, so that the integral structural strength of the nut connecting plate is ensured.
Preferably, the outer side wall of the nut connecting plate is fixedly connected with the inner side wall of the matching groove through laser welding to finish the fixed connection between the nut connecting plate and the valve seat, and the reliability of the nut connecting structure is improved again.
The utility model has the advantages that: the utility model can change the nut structure into the combination of the punching sheet and the injection molding piece to improve the reliability of the thread pair, thereby improving the reliability of the product; in addition, the assembly requirement is reduced, the part cost of the product is reduced, and the competitiveness of the product is increased.
Drawings
Fig. 1 is a schematic structural view of a nut connecting structure of high reliability according to the present invention;
fig. 2 is a schematic perspective view of a nut body in a nut connection structure with high reliability according to the present invention;
fig. 3 is a schematic perspective view of a nut connecting plate in a nut connecting structure with high reliability according to the present invention;
fig. 4 is a schematic perspective view of a valve seat in a nut connection structure with high reliability according to the present invention.
The parts in the drawings are numbered as follows: 1. an electronic expansion valve; 2. a valve seat; 21. a first circular groove; 22. a second circular groove; 23. a mating groove; 24. an overflowing hole; 3. a nut body; 31. an annular groove; 4. a nut connecting plate; 41. injection molding a connecting notch; 42. and an overflow notch.
Detailed Description
The following detailed description of the preferred embodiments of the present invention will be provided in conjunction with the accompanying drawings, so as to enable those skilled in the art to more easily understand the advantages and features of the present invention, and thereby define the scope of the invention more clearly and clearly.
Referring to fig. 1 to 4, an embodiment of the present invention includes:
a nut connecting structure with high reliability is applied to an electronic expansion valve 1. The nut connection structure includes: injection moulding's nut body 3 and stamping forming's nut connecting plate 4, nut connecting plate 4 with the structure of 3 fixed connection formula as an organic whole of nut body.
An annular groove 31 is arranged on the outer side wall of the nut body 3. The nut connecting plate 4 is annular, and the nut connecting plate 4 is a punched sheet. The nut connecting plate 4 is fixedly matched in the annular groove 31, and the outer diameter of the nut connecting plate 4 is larger than that of the nut body 3. When the nut body 3 is subjected to injection molding, the nut connecting plate 4 is placed into an injection mold, and the nut body 3 is integrally connected with the nut connecting plate 4 after the injection molding is completed.
Four injection connection notches 41 are formed in the inner side wall of the nut connecting plate 4, the four injection connection notches 41 are arranged around the axis of the nut connecting plate 4 in an evenly distributed mode, the injection connection notches 41 are beneficial to the integration of the nut connecting plate 4 and the nut body 3 in an injection mode, and the reliability of connection after injection is improved. Four overflowing notches 42 are formed in the outer side wall of the nut connecting plate 4, the four overflowing notches 42 surround the axis of the nut connecting plate 4 and are evenly distributed, and the overflowing notches 42 can be correspondingly communicated with the overflowing holes 24 in the valve seat 2 (namely, are aligned with the overflowing holes 24), so that internal pressure conduction is facilitated. The injection molding connecting notch 41 and the overflowing notch 42 are staggered (namely the injection molding connecting notch 41 is not opposite to the overflowing notch 42, and the connecting line of the injection molding connecting notch and the overflowing notch 42 is not intersected with the axis of the nut connecting plate 4) so as to ensure the integral structural strength.
A valve seat 2 of the electronic expansion valve 1 is provided with a first circular groove 21 which is in interference fit with the nut body 3; the nut body 3 is fixedly inserted into the first circular groove 21, and the nut body 3 is in interference fit with the valve seat 2 for guiding and positioning. The valve seat 2 is further provided with a second circular groove 22, the axis of the second circular groove 22 is overlapped with the axis of the first circular groove 21, the inner diameter of the second circular groove 22 is larger than that of the first circular groove 21, and an inner step surface is formed between the second circular groove 22 and the first circular groove 21; the inner step surface is provided with a matching groove 23 for accommodating the nut connecting plate 4, and the depth of the matching groove 23 is the same as the thickness of the nut connecting plate 4. The overflowing hole 24 on the valve seat 2 is communicated with the matching groove 23. Nut body 3 is fixed to be inserted and is established when in the first circular recess 21, nut connecting plate 4 is located in the cooperation groove 23, the lower surface of nut connecting plate 4 supports on the tank bottom surface of cooperation groove 23, the upper surface of nut connecting plate 4 with interior step face parallel and level, an overflow breach 42 on the nut connecting plate 4 with cross discharge orifice 24 on the disk seat 2 aligns, nut connecting plate 4 is fixed through laser welding all around in the cooperation groove 23 to accomplish the fixed connection of nut connecting plate 4 and disk seat 2, increaseed the reliability of this nut connection structure installation again.
The utility model can change the nut structure into the combination of the punching sheet and the injection molding piece to improve the reliability of the thread pair, thereby improving the reliability of the product; in addition, the assembly requirement is reduced, the part cost of the product is reduced, and the competitiveness of the product is increased.
The above only is the embodiment of the present invention, not limiting the patent scope of the present invention, all the equivalent structures or equivalent processes that are used in the specification and the attached drawings or directly or indirectly applied to other related technical fields are included in the patent protection scope of the present invention.
Claims (6)
1. A high-reliability nut connecting structure is applied to an electronic expansion valve; it is characterized in that the nut connecting structure comprises: the nut connecting plate comprises a nut body formed by injection molding and a nut connecting plate formed by punch forming; the outer side wall of the nut body is provided with an annular groove, the nut connecting plate is annular, the nut connecting plate is fixedly matched in the annular groove, and the outer diameter of the nut connecting plate is larger than that of the nut body; a valve seat of the electronic expansion valve is provided with a first circular groove which is in interference fit with the nut body; the valve seat is further provided with a second circular groove, the inner diameter of the second circular groove is larger than that of the first circular groove, an inner step surface is formed between the second circular groove and the first circular groove, a matching groove used for correspondingly containing the nut connecting plate is formed in the inner step surface, and the depth of the matching groove is the same as the thickness of the nut connecting plate.
2. A nut connecting structure of high reliability according to claim 1, wherein: and the outer side wall of the nut connecting plate is provided with a flow passing notch which is used for being correspondingly communicated with the flow passing hole in the valve seat.
3. A nut connecting structure of high reliability according to claim 2, wherein: the plurality of the overflow notches are uniformly distributed around the axis of the nut connecting plate; one of the plurality of flow notches is aligned with the flow aperture.
4. A nut connecting structure of high reliability according to claim 2 or 3, wherein: a plurality of injection molding connecting gaps are formed in the inner side wall of the nut connecting plate, and the plurality of injection molding connecting gaps are uniformly distributed around the axis of the nut connecting plate.
5. A nut connecting structure of high reliability according to claim 4, wherein: the position of the injection molding connecting notch on the nut connecting plate is staggered with the position of the overflowing notch.
6. A nut connecting structure of high reliability according to claim 1, wherein: the outer side wall of the nut connecting plate is fixedly connected with the inner side wall of the matching groove through laser welding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120521685.XU CN214368083U (en) | 2021-03-12 | 2021-03-12 | Nut connection structure of high reliability |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120521685.XU CN214368083U (en) | 2021-03-12 | 2021-03-12 | Nut connection structure of high reliability |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214368083U true CN214368083U (en) | 2021-10-08 |
Family
ID=77971028
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120521685.XU Active CN214368083U (en) | 2021-03-12 | 2021-03-12 | Nut connection structure of high reliability |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214368083U (en) |
-
2021
- 2021-03-12 CN CN202120521685.XU patent/CN214368083U/en active Active
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