CN2791416Y - Driving screw-nut structure - Google Patents
Driving screw-nut structure Download PDFInfo
- Publication number
- CN2791416Y CN2791416Y CN 200520101336 CN200520101336U CN2791416Y CN 2791416 Y CN2791416 Y CN 2791416Y CN 200520101336 CN200520101336 CN 200520101336 CN 200520101336 U CN200520101336 U CN 200520101336U CN 2791416 Y CN2791416 Y CN 2791416Y
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- Prior art keywords
- nut
- screw
- utility
- model
- screw thread
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- Expired - Lifetime
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Abstract
The utility model relates to a driving screw-nut structure in an electronic expansion valve or similar valves. The existing driving screw-nut can be deformed and shrunk after pressed, riveted or fixed by injection molding, the precision of screw threads is influenced, the action performance of a valve body is caused to be unstable and the valve body can be moved occasionally, and the producing consistency is poor. The utility model comprises a screw-nut main body and screw threads which are positioned on an inner wall which is arranged on the lower segment of the driving screw-nut structure. The utility model is characterized in that a groove is arranged on an outer wall on the lower segment of the screw-nut main body. The utility model not only improves the reliability of a screw-nut which is fixed but also prevents the deformation of the screw threads, the shape and the dimensional precision of the screw threads can not be influenced completely, and the stability of the action performance of the valve body is effectively ensured.
Description
Technical field
The utility model relates to the transmission nut structure in electric expansion valve or the valve-like.
Background technique
Electric expansion valve is made up of valve body I and coil II, as shown in Figure 1, give the coil break-make continuous impulsive current, tooth is in coil extremely gone up the magnetic pole that produces alternate, thereby the permanent magnet rotor 6 ' that drives in the valve body I rotates, outside thread and the screw-internal thread fit that is fitted in the transmission nut 4 ' on the valve seat 3 ' by screw mandrel 5 ', convert moving up and down of needle 7 ' to, the control valve port opening, thus realize from taking over 1 ' accurate control to the flow of taking over 2 ' (or from taking over 2 ') to taking over 1 '.Wherein, the outside thread quality requirement of the internal thread of transmission nut 4 ' and screw mandrel 5 ' is very high, and its quality condition directly influences the performance and the life-span of electric expansion valve.
In existing most of electric expansion valves or valve-like, transmission nut cylindrical (as shown in Figure 2), it is to press-fit or riveted way and valve seat are fixed together, nut outer wall contacts fully with valve seat, the relative screw mandrel of the material of transmission nut 4 ' is softer, be generally copper, more yielding, since the reliability of nut after being fixed with prevent that screw thread 8 ' contraction deformation from being a pair of contradiction, press-fited, can contraction deformation after the riveted fixing, influenced the precision of screw thread, cause valve body performance instability, motionless when time thes be moving, conformity of production is poor.In addition, in existing some electric expansion valve or valve-like, transmission nut is injection-moulded in fully with magnet rotor, and nut is also cylindrical, and nut outer wall contacts fully with magnet rotor, exists the problems referred to above equally.
The model utility content
Technical problem to be solved in the utility model is to overcome the defective that above-mentioned prior art exists, and a kind of reliability that can improve after nut is fixed is provided, and can effectively reduce the transmission nut structure of screw thread distortion again, to guarantee the stability of valve body performance.
For this reason, the technical solution adopted in the utility model is as follows: the transmission nut structure, and comprise nut body and be positioned at screw thread on its hypomere inwall, it is characterized in that having groove on the outer wall of nut body hypomere.The utility model has changed the shape of original nut hypomere, when transmission nut to press-fit or riveted way and valve seat when being fixed together (or be fixed together with injection moulding mode and magnet rotor), groove reduces the nut hypomere and contacts (contacting fully) between the two with deformability between valve seat or magnet rotor, substantially do not influence the shape and the dimensional accuracy that are positioned at the screw thread on the nut hypomere inwall, guaranteed the stability of valve body performance.
Described transmission nut structure, the lower ending opening of groove, its length makes the shape of whole section screw thread and dimensional accuracy all unaffected more than or equal to the length of screw thread.
Described transmission nut structure, groove ringwise.When transmission nut to press-fit or riveted way and valve seat when being fixed together (or be fixed together with injection moulding mode and magnet rotor), annular groove makes the nut hypomere contact (not contact between the two) with not deforming property between valve seat or magnet rotor, do not influence the shape and the dimensional accuracy that are positioned at the screw thread on the nut hypomere inwall fully, effectively guaranteed the stability of valve body performance.
The beneficial effects of the utility model are: both improved the reliability after nut is fixed, prevented the distortion of screw thread again, do not influenced the shape and the dimensional accuracy of screw thread fully, effectively guaranteed the stability of valve body performance.
Below in conjunction with drawings and Examples the utility model is further described.
Description of drawings
Fig. 1 is the structural representation of existing electric expansion valve.
Fig. 2 is the schematic representation that existing transmission nut and valve seat are fixed together.
Fig. 3 is a kind of structural representation of the present utility model (affixed with valve seat).
Fig. 4 is another kind of structural representation of the present utility model (affixed with magnet rotor).
Embodiment
Embodiment 1: transmission nut structure as shown in Figure 3, nut body 1 adopts interference fit with valve seat 4, the hypomere inwall of nut body 1 has screw thread 2, screw thread 2 can cooperate with screw mandrel, form an annular groove 3 on the outer wall of nut body 1 hypomere, the lower ending opening of this annular groove 3, its length L 2 is greater than the length L 1 of screw thread 2.The hypomere that annular groove 3 makes nut body 1 and valve seat 4 not deforming property contact, and not contact does not between the two influence the shape and the dimensional accuracy of screw thread 2 fully, has effectively guaranteed the stability of valve body performance.
Particularly point out at this, nut body also can adopt riveted way to be fixed on the valve seat.
Embodiment 2: be to form a plurality of axial notch spaced apart, its lower ending openings of being on the outer wall of nut body 1 hypomere with embodiment 1 difference.
Embodiment 3: transmission nut structure as shown in Figure 4, nut body 1 is fixed together with magnet rotor 5 direct injection mouldings, nut body 1 hypomere inwall has screw thread 2, this screw thread 2 can cooperate with screw mandrel, the outer wall place of nut body 1 hypomere has an annular groove 3, the lower ending opening of this annular groove 3, its length L 2 is greater than the length L 1 of screw thread 2.
Embodiment 4: be to form a plurality of axial notch spaced apart, its lower ending openings of being on the outer wall of nut body 1 hypomere with embodiment 3 difference.
Claims (3)
1, transmission nut structure comprises nut body (1) and is positioned at screw thread (2) on its hypomere inwall, it is characterized in that having groove (3) on the outer wall of nut body (1) hypomere.
2, transmission nut structure according to claim 1 is characterized in that the lower ending opening of described groove (3), and its length is more than or equal to the length of screw thread (2).
3, transmission nut structure according to claim 2 is characterized in that described groove (3) ringwise.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520101336 CN2791416Y (en) | 2005-03-30 | 2005-03-30 | Driving screw-nut structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520101336 CN2791416Y (en) | 2005-03-30 | 2005-03-30 | Driving screw-nut structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2791416Y true CN2791416Y (en) | 2006-06-28 |
Family
ID=36807486
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520101336 Expired - Lifetime CN2791416Y (en) | 2005-03-30 | 2005-03-30 | Driving screw-nut structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2791416Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111853252A (en) * | 2019-04-30 | 2020-10-30 | 浙江三花智能控制股份有限公司 | Electronic expansion valve |
-
2005
- 2005-03-30 CN CN 200520101336 patent/CN2791416Y/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111853252A (en) * | 2019-04-30 | 2020-10-30 | 浙江三花智能控制股份有限公司 | Electronic expansion valve |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20150330 Granted publication date: 20060628 |