CN2906234Y - Structure for fixing screw nut of electronic expansion valve - Google Patents
Structure for fixing screw nut of electronic expansion valve Download PDFInfo
- Publication number
- CN2906234Y CN2906234Y CN 200620103378 CN200620103378U CN2906234Y CN 2906234 Y CN2906234 Y CN 2906234Y CN 200620103378 CN200620103378 CN 200620103378 CN 200620103378 U CN200620103378 U CN 200620103378U CN 2906234 Y CN2906234 Y CN 2906234Y
- Authority
- CN
- China
- Prior art keywords
- nut
- gear
- nuts
- gear case
- box
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Abstract
The utility model relates to a nuts fixed structure for electric expansion valves. In the actual expansion valves, the nuts flanging connected with the gear case is riveted with the inner edge of the gear case through interference fit, the riveting area is smaller, the torque bearing between the nuts and the gear case is smaller lead to the out-of-step phenomenon of the electric expansion valve and affecting the use of the products. The utility model comprises the nuts connected with the gear case, the nuts has the internal thread combined with the external thread of the screw, and has the flanging on the tip, the utility model is characterized in that the gear case is provided with a groove at the part combined with the flanging, the flanging is provided with a positioning convex riveted with the groove. The utility model increases the riveting area between the nuts and the gear case, improves the torque of the nuts and the gear case, avoids the opposite rotation between the nuts and the gear case and makes the products steady and reliable.
Description
Technical field
The utility model relates to the modular construction of the electric expansion valve that is used for frequency-conversion air-conditioning system, specifically a kind of nut fixed structure.
Background technique
Electric expansion valve is by the rotation of the electronic controller controls stepping motor rotor of air-conditioning system, the driven gear retarder, and by the transmission of screw pair and the transmission of bellows, drive needle and move axially, thereby reach the flow area of regulating valve port, play the purpose of regulating refrigerant flow.The nut fixed structure following (shown in Fig. 1-2) of present electric expansion valve: with the nut that the gear-box interference fit is connected, this nut is provided with the internal thread that cooperates with the screw mandrel outside thread, and the top of nut is provided with a circle flange.The flange of nut is by the inside edge riveted joint of interference fit and gear-box, riveted joint area between the two is little, nut can not be well fixed on gear-box, moment of torsion bearing strength between nut and gear-box is less, and particularly electric expansion valve is through after vibrating, and the riveted joint position produces the gap, can rotate mutually between gear-box and nut, directly can cause the rotation of retarder, thereby make electric expansion valve produce the step-out phenomenon, have a strong impact on the use of product.
The model utility content
Technical problem to be solved in the utility model is to overcome the defective that above-mentioned prior art exists, a kind of new type nut fixed structure of electric expansion valve is provided, it is by increasing the riveted joint area between nut and gear-box, thereby improve the moment of torsion between nut and gear-box, avoid taking place between gear-box and nut to rotate mutually, guarantee that the use of product is reliable and stable.
For this reason, the utility model adopts following technological scheme: the nut fixed structure of electric expansion valve, comprise the nut that is connected with gear-box, this nut is provided with the internal thread that cooperates with the screw mandrel outside thread, the top of nut is provided with flange, it is characterized in that the gear-box place that cooperates with flange has groove, form positioning convex portion on the described flange with the groove riveted joint.During assembling, earlier nut is filled in the gear-box endoporus, the top of nut forms a circle flange by plastic deformation, the inside edge riveted joint of flange and gear-box, and then at the downward indent in the part of flange, because the hardness of the hardness ratio gear-box material of nut material is big, the flange that nature can be pressed down on the gear-box extrudes several grooves, meanwhile, the back side that presses down flange also can form several positioning convex portion with several groove riveted joints; Also can on gear-box, open several grooves in advance, extrude several following protruding positioning convex portion then in the part of flange and clamp-on respectively in the above-mentioned groove.On the basis of the inside edge riveted joint of the utility model flange and gear-box in the existing product structure, the groove riveted structure of opening on prominent positioning convex portion that forms and the gear-box is descended in the part that has increased the flange back side, increased the riveted joint area between nut and gear-box like this, increased the moment of torsion of nut and gear-box, avoid taking place between gear-box and nut to rotate mutually, make the use of product reliable and stable.
The nut fixed structure of described electric expansion valve, groove is more than 2 or 2, in order to the rivet force between stiffnut and gear-box, further improve the moment of torsion between nut and gear-box, described a plurality of groove is circumference uniform distribution, make nut and the gear-box symmetry of rivet force everywhere between the two, to keep balance.
The nut fixed structure of described electric expansion valve, the cross section of groove is rectangular, circular arc or triangle, also can adopt other analogous shape, makes the riveted joint area of positioning convex portion at itself and the flange back side big.
The utility model has improved the moment of torsion between nut and gear-box by increasing the riveted joint area between nut and gear-box, has avoided the mutual rotation between gear-box and nut, and product is reliable and stable.
Below in conjunction with drawings and Examples the utility model is described further.
Description of drawings
Fig. 1 is the structural representation of existing electric expansion valve.
Fig. 2 is the schematic representation of nut fixed structure among Fig. 1.
Fig. 3 is a structural representation of the present utility model.
Fig. 4 is that the A-A of Fig. 3 is to partial enlarged drawing.
Fig. 5 is that the B-B of Fig. 3 is to partial enlarged drawing.
Fig. 6 is the electric expansion valve structural drawing with the utility model structure.
Embodiment
The nut fixed structure of the electric expansion valve shown in Fig. 3-5, the nut 2 that is connected with gear-box 1, this nut 2 is provided with the internal thread that cooperates with screw mandrel 3 outside threads, the top of nut 2 utilizes the plasticity of material to form a circle flange 4, form a ring-shaped step 5 with the gear-box place of flange riveted joint, the inside edge riveted joint of flange and ring-shaped step, ring-shaped step 5 places have 4 grooves 6 that are symmetrical distribution, the cross section of groove 6 is rectangular, the local outstanding downwards formation at the flange back side and 4 positioning convex portion 7 of 4 grooves, 6 riveted joints.On the basis of the inside edge riveted joint of the utility model flange and ring-shaped step in original structure, the prominent down positioning convex portion that forms in part at the flange back side and the groove riveted structure that the ring-shaped step place opens have been increased, increased the riveted joint area between nut and gear-box, increased the moment of torsion of nut and gear-box, avoided taking place between gear-box and nut to rotate mutually.
During the utility model assembling, earlier nut is filled in the gear-box endoporus, the top of nut forms a circle flange by plastic deformation, the inside edge riveted joint of flange and ring-shaped step, and then at the downward indent in the part of flange, because the hardness of the hardness ratio gear-box material of nut material is big, the flange that the ring-shaped step place of gear-box can be pressed down naturally extrudes 4 grooves, meanwhile, the back side that presses down flange also can form 4 positioning convex portion with 4 grooves riveted joints.
As shown in Figure 6, electric expansion valve is by the rotation of electronic controller controls stepper motor 8 rotors of air-conditioning system, driven gear retarder 9, and by the transmission of screw pair 10 and the transmission of bellows 11, driving needle 12 moves axially, thereby reach the flow area of regulating valve port 13, play the purpose of regulating refrigerant flow.
Be with embodiment 1 difference: the gear-box place that cooperates with flange is not provided with ring-shaped step, directly recessing on gear-box, the local outstanding downwards formation at the flange back side and the positioning convex portion of groove riveted joint.
Claims (4)
1, the nut fixed structure of electric expansion valve, comprise the nut (2) that is connected with gear-box (1), this nut (2) is provided with the internal thread that cooperates with screw mandrel (3) outside thread, the top of nut (2) is provided with flange (4), it is characterized in that the gear-box place that cooperates with flange has groove (6), form positioning convex portion (7) on the described flange with groove (6) riveted joint.
2, the nut fixed structure of electric expansion valve according to claim 1 is characterized in that described groove (6) is more than 2 or 2.
3, the nut fixed structure of electric expansion valve according to claim 2 is characterized in that described groove (6) is circumference uniform distribution.
4,, it is characterized in that the cross section of groove (6) is rectangular, circular arc or triangle according to the nut fixed structure of claim 2 or 3 described electric expansion valves.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620103378 CN2906234Y (en) | 2006-04-30 | 2006-04-30 | Structure for fixing screw nut of electronic expansion valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620103378 CN2906234Y (en) | 2006-04-30 | 2006-04-30 | Structure for fixing screw nut of electronic expansion valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2906234Y true CN2906234Y (en) | 2007-05-30 |
Family
ID=38114869
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200620103378 Expired - Lifetime CN2906234Y (en) | 2006-04-30 | 2006-04-30 | Structure for fixing screw nut of electronic expansion valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2906234Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102734991A (en) * | 2011-04-02 | 2012-10-17 | 浙江三花股份有限公司 | Assembly method of electronic expansion valve |
-
2006
- 2006-04-30 CN CN 200620103378 patent/CN2906234Y/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102734991A (en) * | 2011-04-02 | 2012-10-17 | 浙江三花股份有限公司 | Assembly method of electronic expansion valve |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20070530 |
|
| EXPY | Termination of patent right or utility model |