CN201170278Y - Combined type leaf spring - Google Patents
Combined type leaf spring Download PDFInfo
- Publication number
- CN201170278Y CN201170278Y CNU200820055727XU CN200820055727U CN201170278Y CN 201170278 Y CN201170278 Y CN 201170278Y CN U200820055727X U CNU200820055727X U CN U200820055727XU CN 200820055727 U CN200820055727 U CN 200820055727U CN 201170278 Y CN201170278 Y CN 201170278Y
- Authority
- CN
- China
- Prior art keywords
- flat spring
- combined type
- moving contact
- plate spring
- plate
- 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 - Fee Related
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Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/0005—Tap change devices
- H01H9/0016—Contact arrangements for tap changers
Abstract
The utility model relates to a combined type plate spring which consists of a plurality of plate springs superposed together, and the lengths of the plurality of the plate springs are decreased in turn from bottom to top. Two ends of each plate spring is divided into plate claws which are matched with moving contact terminals and have the same number with the moving contact terminals. A claw head of the plate claw of the lowermost plate spring is sleeved with an insulating bush. The plurality of the plate springs are superposed, riveted and combined through a rivet which runs through a rivet hole on each plate spring and through a splint positioned on the underside of the lowermost plate spring. In the combined type plate spring provided by the utility model, each claw head of the plate claws on two ends can carry out compaction to each single moving contact terminal, thereby ensuring good contact and conduction among a contact of each single moving contact terminal, a contact ring and a static contact and increasing the conduction capability of a tapping switch. The plate spring component adopted by the combined type plate spring has a small occupied space and good pressure consistency and fatigue resistant strength, so that the structure of the moving contact terminal component is compact, thereby the design of the tapping switch is more compact and reasonable.
Description
Technical field
The utility model relates to the shunting switch field of transformer, relates in particular to the employed combined type flat spring of load ratio bridging switch moving contact arranged side by side of transformer.
Background technique
Electrical network is to high voltage, big current direction development now, and it requires more and more higher to transformer voltage, and current requirements is increasing, and this just requires the shunting switch supporting with it also need have the ability of accepting high-voltage large current.
In conventional art, in order to enlarge the ability of load ratio bridging switch by electric current, adopting multiple contact is method relatively more commonly used side by side.Usually the contact pressure of contact is to adopt spring compression, and spring is generally selected helical spring or sheet spring for use.Adopt helical spring example that the clipping moving contact 2 of double-contact is as shown in Figure 1 arranged, as shown in Figure 2, the upper and lower contact 21,22 of the clipping moving contact 2 of this double-contact is the clamping shape, adopts cylindrically coiled spring to compress.For increasing upper and lower contact 21,22 conductive capabilities, at upper and lower contact 21,22 two ends two contacts 23,24,25,26 are set all, make corresponding up and down existing 4 contacts of every end of moving contact 2, but the shunting switch maximum current also can only reach 600A like this.And the sheet spring is the monolithic spring, i.e. 1 sheet spring.
Conventional art adopts helical spring to take up room greatly the mounting structure complexity; The pressure consistency of monolithic spring is bad, and endurance life is not enough, and the life-span is short.
The model utility content
The utility model is exactly the employed combined type flat spring of a kind of load ratio bridging switch moving contact arranged side by side that proposes for the deficiency that overcomes above-mentioned prior art.
The technical problem that the utility model solved can realize by the following technical solutions: this combined type flat spring, be formed by stacking by a plurality of flat springs, and the length of described a plurality of flat springs reduces from bottom to up successively.
The two ends of described each flat spring are separated into the sheet pawl identical with the moving contact quantity that is used.
In the combined type flat spring of the present utility model, the big or small length of lowermost flat spring is corresponding with described moving contact, at the pawl headgear of the sheet pawl of lowermost flat spring insulating bush is arranged, and plays insulation and every the heat insulation effect of magnetic, avoids burning out flat spring.
The described shape that is superimposed upon each flat spring on the lowermost flat spring is similar to lowermost flat spring, and just the length of sheet pawl shortens from bottom to top piecewise.
Middle part at each flat spring has rivet hole, after described a plurality of flat spring stacks, by rivet that passes the rivet hole on each flat spring and the supporting plate riveted joint combination that is positioned at lowermost flat spring bottom surface.
The combined type flat spring that the utility model provides, each pawl head of the sheet pawl at two ends can be implemented to compress to each single moving contact, thereby guaranteed that the contact on each single moving contact all can form the excellent contact conducting with contact ring and fixed contact, has increased the ducting capacity of shunting switch.The flat spring assembly that the utility model adopts takes up room little, and pressure consistency is relatively good, has good endurance life, makes the moving contact component compact structure simultaneously, thereby also can make the compact and reasonable more of shunting switch design.
Description of drawings
Fig. 1 is the clipping moving contact structure schematic representation of prior art double-contact;
Fig. 2 is a combined type flat spring structural representation described in the utility model;
Fig. 3 is the decomposition texture schematic representation of Fig. 2 combined type flat spring.
Fig. 4 is applied in structural representation on the moving contact of load ratio bridging switch for the utility model combined type flat spring.
Embodiment
For technological means, creation characteristic that the utility model is realized, reach purpose and effect is easy to understand, below in conjunction with concrete diagram, further set forth the utility model.
Referring to Fig. 2, the combined type flat spring 1 of present embodiment is formed by stacking by three flat springs 11,12,13, the shape of three flat springs 11,12,13 is similar, and two ends all are separated into the sheet pawl 111,121,131 (referring to Fig. 3) identical with the moving contact quantity that is used, as four sheet pawls.Have two rivet holes 112,122,132 at the middle part of each sheet flat spring 11,12,13.
The length of three flat springs 11,12,13 reduces from bottom to up successively, and promptly lowermost that sheet flat spring 11 is the longest, and middle that sheet flat spring 12 is short slightly, and topmost that sheet flat spring 13 is the shortest.That is to say that just the length of sheet pawl 111,121,131 shortens from bottom to top piecewise.
The big or small length of bottom that blocks of spring 11 is corresponding with moving contact, is with insulating bush 14 in the end of its sheet pawl 111, and insulating bush 14 plays insulation and every the heat insulation effect of magnetic, can avoid burning out flat spring 11.
After three flat spring 11,12,13 stacks, by rivet that passes the rivet hole 112,122,132 on each sheet flat spring 11,12,13 and the supporting plate 15 riveted joint combinations that are positioned at lowermost flat spring 11 bottom surfaces.
The quantity of the flat spring in the combined type flat spring 1 of present embodiment is not limited to three, can increase according to needed elastic force.
Referring to Fig. 4, combined type flat spring 1 of the present utility model is installed in the clipping moving contact 3, the two groups of first end clamping of movable contact contact rings 4 in the clipping moving contact 3, the other end clamping static contact 5, make flat spring 11,12,13 distortion in the combined type flat spring 1, and the reaction force of flat spring 11,12,13 makes each the single moving contact in the moving contact group contact with fixed contact 5 with contact ring 4 by the pressure of setting, to reach the purpose of the big electric current of conducting.
More than show and described basic principle of the present utility model and major character and advantage of the present utility model.The technician of the industry should understand; the utility model is not restricted to the described embodiments; that describes in the foregoing description and the specification just illustrates principle of the present utility model; under the prerequisite that does not break away from the utility model spirit and scope; the utility model also has various changes and modifications, and these changes and improvements all fall in claimed the utility model scope.The claimed scope of the utility model is defined by appending claims and equivalent thereof.
Claims (5)
1. combined type flat spring, it is characterized in that: be formed by stacking by a plurality of flat springs, the length of described a plurality of flat springs reduces from bottom to up successively.
2. combined type flat spring according to claim 1 is characterized in that, the two ends of described each flat spring are separated into the sheet pawl identical with the moving contact quantity that is used.
3. combined type flat spring according to claim 2 is characterized in that, the big or small length of lowermost flat spring is corresponding with described moving contact, at the pawl headgear of the sheet pawl of lowermost flat spring insulating bush is arranged.
4. combined type flat spring according to claim 2 is characterized in that, the described shape that is superimposed upon each flat spring on the lowermost flat spring is similar to lowermost flat spring, and the length of sheet pawl shortens from bottom to top piecewise.
5. combined type flat spring according to claim 1 and 2, it is characterized in that, middle part at each flat spring has rivet hole, after described a plurality of flat spring stacks, by rivet that passes the rivet hole on each flat spring and the supporting plate riveted joint combination that is positioned at lowermost flat spring bottom surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200820055727XU CN201170278Y (en) | 2008-02-26 | 2008-02-26 | Combined type leaf spring |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200820055727XU CN201170278Y (en) | 2008-02-26 | 2008-02-26 | Combined type leaf spring |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201170278Y true CN201170278Y (en) | 2008-12-24 |
Family
ID=40209331
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU200820055727XU Expired - Fee Related CN201170278Y (en) | 2008-02-26 | 2008-02-26 | Combined type leaf spring |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201170278Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3098824A1 (en) * | 2015-05-27 | 2016-11-30 | ABB Technology Ltd | A contact unit for a tap changer and a tap selector comprising the contact unit |
-
2008
- 2008-02-26 CN CNU200820055727XU patent/CN201170278Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3098824A1 (en) * | 2015-05-27 | 2016-11-30 | ABB Technology Ltd | A contact unit for a tap changer and a tap selector comprising the contact unit |
| US9824832B2 (en) | 2015-05-27 | 2017-11-21 | Abb Schweiz Ag | Contact unit for a tap changer and a tap selector comprising the contact unit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20081224 Termination date: 20170226 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |