CN105405686B - A kind of switching device - Google Patents
A kind of switching device Download PDFInfo
- Publication number
- CN105405686B CN105405686B CN201510918699.4A CN201510918699A CN105405686B CN 105405686 B CN105405686 B CN 105405686B CN 201510918699 A CN201510918699 A CN 201510918699A CN 105405686 B CN105405686 B CN 105405686B
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- CN
- China
- Prior art keywords
- contact
- guide rod
- magnetic conductor
- static
- switching device
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Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H1/00—Contacts
- H01H1/50—Means for increasing contact pressure, preventing vibration of contacts, holding contacts together after engagement, or biasing contacts to the open position
- H01H1/54—Means for increasing contact pressure, preventing vibration of contacts, holding contacts together after engagement, or biasing contacts to the open position by magnetic force
Landscapes
- Arc-Extinguishing Devices That Are Switches (AREA)
Abstract
A kind of switching device, belong to low voltage electrical apparatus technology field.Moving contact, static contact including a pair of mutual cooperations, moving contact is acted on to realize shell of the circuit connection with the operating mechanism of breaking operation and for housing said apparatus, moving contact includes moving contact guide rod and the movable contact being arranged on moving contact guide rod, static contact includes static contact guide rod and the stationary contact being arranged on static contact guide rod, during dynamic and static contact, both form contact area, feature：Switching device also includes the first magnetic conductor that shape of cross section is U-shaped, and the first magnetic conductor is set close to contact area, and its opening, towards moving contact guide rod, moving contact guide rod is parallel to each other both in dynamic and static contact with static contact guide rod.The contact pressure between dynamic and static contact can be improved, switching device is carried the short circuit current of a period of time, i.e., on dynamic and static contact during short circuit current flow, dynamic and static contact remains to keep contact not separate, it is ensured that the reliability and continuity of power supply.
Description
Technical field
The invention belongs to low voltage electrical apparatus technology field, and in particular to a kind of switching device, it can bear certain specified short
When be resistant to electric current.
Background technology
Switching device can be switched off and on load circuit, moreover it is possible to disengagement failure circuit, can be with guarantor in system jam
Protection unit and automatics are engaged, and rapid disengagement failure electric current is to prevent fault spread, so as to ensure system safety operation.With
The continuous development of level of power, new technology, new technology continuously emerge, and the performance of switching device has large increase, some
Special use occasion, user it is also proposed higher requirement to switching device, such as require that switching device has necessarily
Tolerance in short-term, i.e. switching device can carry the short circuit current of a period of time, it is ensured that the reliability and continuity of power supply.
Switching device is typically made up of contact, arc-control device, operating mechanism etc., and wherein contact includes moving contact and stationary contact again
Head, dynamic and static contacts mates can realize circuit connection or disjunction.Contact pressure is an important parameter of switching device, works as failure
When electric current such as short circuit current is by the major loop of switching device, very big electrodynamic repulsion force can be produced between dynamic and static contact, if touching
Head pressure is less than the electrodynamic repulsion force, then dynamic and static contact is shaken and causes electric arc up and down, then causes contact burning.Therefore, setting
, it is necessary to pay attention to making contact pressure to meet between dynamic and static contact reliable contacts to avoid the requirement of shake when counting switching device.
In view of above-mentioned prior art, it is necessary to improved the structure of existing switching device.Therefore, the applicant makees
Beneficial design, technical scheme described below are caused under this background.
The content of the invention
It is an object of the invention to provide a kind of switching device with tolerance in short-term, its can to dynamic and static contact it
Between electrodynamic repulsion force compensate, and it is simple in construction, easily manufactured, cost is cheap.
The purpose of the present invention is such to what is reached, a kind of switching device, including the moving contact of a pair of mutual cooperations, stationary contact
Head, moving contact is acted on to realize shell of the circuit connection with the operating mechanism of breaking operation and for housing said apparatus,
Described moving contact includes moving contact guide rod and the movable contact being arranged on moving contact guide rod, and described static contact includes static contact
Guide rod and the stationary contact being arranged on static contact guide rod, when movable contact, stationary contact contact, both form contact area, its feature
It is：Described switching device also includes the first magnetic conductor that shape of cross section is U-shaped, and the first described magnetic conductor is close to be connect
Touch region to set, and its opening, towards moving contact guide rod, moving contact guide rod is with static contact guide rod when movable contact, stationary contact contact
Both are parallel to each other.
In the specific embodiment of the present invention, described switching device also includes flat second magnetic conductor,
One end of the length direction of the second described magnetic conductor extend in the die cavity of the first magnetic conductor and with the bottom of the first magnetic conductor
Fixed, the other end of the length direction of the second magnetic conductor is fixed with described static contact guide rod, the fixing point difference at above-mentioned two
Positioned at the left and right sides of stationary contact.
In another specific embodiment of the present invention, the first described magnetic conductor faces each other parallel including a pair
The side wall of setting and a bottom for connecting above-mentioned two side wall, side wall set up separately in moving contact guide rod both sides, and bottom is positioned at dynamic
Below contact guide rod, and, stationary contact is partly or wholly located in the die cavity of the first magnetic conductor.
The present invention compared with prior art, has an advantageous effect in that：Moving contact guide rod touches with static contact guide rod dynamic and static
Because both form two guide rods that are parallel to each other and the electric current of equidirectional are flowed through on two guide rods and caused electronic during point contact
Suction, due to being additionally arranged the first magnetic conductor, the magnetic field of contact area is enhanced, further enhancing the electricity between dynamic and static guide rod
Dynamic suction, and moving contact, to the cephalomotor power of stationary contact, both compensate to the electrodynamic repulsion force between dynamic and static contact jointly,
Thus, it is possible to improve the contact pressure between dynamic and static contact, switching device is carried the short circuit current of a period of time, i.e., it is dynamic and static
On contact during short circuit current flow, dynamic and static contact remains to keep contact not separate, it is ensured that the reliability and continuity of power supply.
Brief description of the drawings
Fig. 1 is the sectional view of switching device of the present invention.
Fig. 2 is the side view of switching device of the present invention.
Assembling schematic diagrams of the Fig. 3 between static contact of the present invention, the first magnetic conductor and the second magnetic conductor.
In figure：1. moving contact, 11. moving contact guide rods, 12. movable contacts；2. static contact, 21. static contact guide rods, 22. stationary contacts
Point；3. operating mechanism, 30. supports, 31. first locks, 32. second locks, 33. trippings, 34. upper connecting rods, 341. jointed shafts,
35. lower link, 36. rotating shafts, 37. Handlesets, 38. main springs；4. shell；5. the first magnetic conductor, 51. bottoms, 52. opening,
53. side wall；6. the second magnetic conductor, 61. one end, 62. other ends.
Embodiment
The embodiment of the present invention will be described in detail with reference to accompanying drawing below by applicant, but applicant is to embodiment
Description be not limitation to technical scheme, any changed in the form rather than substance according to present inventive concept should all be considered as this
The protection domain of invention.
Fig. 1 and Fig. 2 are referred to, the present invention relates to a kind of switching device, including the moving contact 1 of a pair of mutual cooperations, stationary contact
First 2, moving contact 1 is acted on to realize that circuit is connected with the operating mechanism 3 of breaking operation and for housing the outer of said apparatus
Shell 4.Described moving contact 1 includes moving contact guide rod 11 and the movable contact 12 being arranged on moving contact guide rod 11, described stationary contact
First 2 include static contact guide rod 21 and the stationary contact 22 being arranged on static contact guide rod 21, are contacted in movable contact 12, stationary contact 22
When, form contact area between dynamic and static contact, moving contact guide rod 11 and static contact guide rod 21 both be parallel to each other.Described operation
Mechanism 3 includes the lock 32 of the lock of support 30, first 31, second, tripping 33, upper connecting rod 34, lower link 35, rotating shaft 36, handle group
Part 37 and main spring 38, first the 31, second lock 32 of lock and tripping 33 are respectively hinged on support 30, tripping 33 and upper company
Bar 34 is be hinged, and upper connecting rod 34 is be hinged with lower link 35 further through a jointed shaft 341, and one end of main spring 38 is hung on Handleset
On 37, the other end be hung on described jointed shaft 341, lower link 35 is again be hinged with rotating shaft 36.Rotating shaft 36 is used to install dynamic touch
First 1, the touch spring for providing closing force between movable contact 12, stationary contact 22 is provided between moving contact 1 and rotating shaft 36.
When switching device is in normal "on" position, the second lock 32 latches 31 and the hasp of tripping 33, upper company with first respectively
Bar 34, lower link 35 and rotating shaft 36 form stable quadric chain, when carrying out switch separating brake, stir Handleset 37 to point
Gate position acts, and Handleset 37 drives main spring 38 to act, and upper connecting rod 34 rotates under the pulling force effect of main spring 38, drives
Lower link 35 acts, and the concomitant rotation of rotating shaft 36, separates movable contact 12, stationary contact 22, eventually arrives at gate-dividing state.
Refer to Fig. 3 and combine Fig. 1 and Fig. 2, described switching device also includes shape of cross section leads for the first of U-shaped
Magnet 5, the first described magnetic conductor 5 are set close to contact area, and its opening 52 is towards moving contact guide rod 11.First magnetic conductor
5 include a bottom 51 of a pair the face each other side wall 53 be arrangeding in parallel and connection above-mentioned two side walls 53, side wall 53
To set up separately in the both sides of moving contact guide rod 11, bottom 51 is located at the lower section of moving contact guide rod 11, and, the partly or wholly position of stationary contact 22
In in the die cavity of the first magnetic conductor 5, the internal face of side wall 53 and movable contact 12, stationary contact 22 will be as close possible to, but not competent
Relate to the action of movable contact 12.The depth of cavity of first magnetic conductor 5, i.e., from bottom 51 to opening 52 at distance h（Shown in Fig. 2）,
It is preferably when setting：After the completion of the assembling of first magnetic conductor 5, the position correspondence at its 52 place that are open is in movable contact 12, stationary contact
The thickness a of moving contact guide rod 11 during 22 contact closure（Shown in Fig. 2）A half thickness where height and position.
The assembly method of the first described magnetic conductor 5 have it is a variety of, for example, it may be corresponding position opens up on shell 4
Groove, the first magnetic conductor 5 are directly placed into the groove, then reassemble static contact 2.In the present embodiment, the first magnetic conductor 5 is logical
Cross flat second magnetic conductor 6 and complete assembling.One end 61 of the length direction of the second described magnetic conductor 6 extends to first
Fixed in the die cavity of magnetic conductor 5 and with the bottom 51 of the first magnetic conductor 5 by riveting, the length direction of the second magnetic conductor 6 it is another
One end 62 is fixed with described static contact guide rod 21 by riveting, and the fixing point at above-mentioned two is located at the left and right of stationary contact 22 respectively
Both sides.The second described magnetic conductor 6 can also strengthen the magnetic of the bottom of static contact guide rod 21 in addition to it can position the first magnetic conductor 5
.
Continuing with referring to Fig. 2, when switching device closes a floodgate, electric current flows to moving contact 1 from static contact 2, while produces magnetic field.
Due to the presence of the first magnetic conductor 5, disperseed aerial magnetic field originally and be concentrated to inside the first magnetic conductor 5, and touched dynamic
First 1 nearby circulates.Magnetic direction at the opening 52 of first magnetic conductor 5 is outside for vertical paper, the electric current in the magnetic field
One is produced on moving contact 1 makes the power that moving contact 1 moves to static contact 2, is thereby produced by suddenly between movable contact 12, stationary contact 22
The electrodynamic repulsion force that Er Muli is formed, described moving contact guide rod 11 contact with static contact guide rod 21 in movable contact 12, stationary contact 22
When both be parallel to each other, due to flowing through the electric current of equidirectional, produce electronic suction to each other.The present invention dynamic and static due to touching
During the closure contact of point 12,22, moving contact guide rod 11 and static contact guide rod 21 form flow through two of equidirectional electric current it is mutually flat
Row guide rod, electronic suction is produced between moving contact 1 and static contact 2, simultaneously as the present invention is additionally arranged the first magnetic conductor 5, enhancing
Magnetic field near contact area, the electric current in the magnetic field produces one on moving contact 1 makes moving contact 1 be transported to static contact 2
Dynamic power, that is, further enhancing the electronic suction between dynamic and static contact 1,2, and above two measure is jointly to movable contact 12, quiet
Electrodynamic repulsion force between contact 22 compensates, and which thereby enhances the contact pressure between moving contact 1, static contact 2, fills switch
The short circuit current of a period of time can be carried by putting, i.e., moving contact 1, on static contact 2 during short circuit current flow, movable contact 12, stationary contact
22 remain to keep contact not separate, it is ensured that the reliability and continuity of power supply.
To consider the manufacturability of parts, the first magnetic conductor 5 can also use thin plate phase of the two panels shape of cross section for U-shaped
The mode of mutual cutting ferrule realizes, the thickness of side wall 53 and bottom 51 required for forming, reduces the processing cost of mould.
In summary, technical scheme provided by the invention overcomes the shortcoming in prior art, has reached goal of the invention, body
The technique effect described in applicant is showed.
Claims (3)
1. a kind of switching device, including the moving contacts (1) of a pair of mutual cooperations, static contact (2), moving contact (1) is acted on reality
Existing circuit is connected with the operating mechanism (3) of breaking operation and for housing moving contact (1), static contact (2) and operating mechanism (3)
Shell (4), described moving contact (1) includes moving contact guide rod (11) and the movable contact that is arranged on moving contact guide rod (11)
(12), described static contact (2) includes static contact guide rod (21) and the stationary contact (22) being arranged on static contact guide rod (21), moves
When contact (12), stationary contact (22) contact, both form contact area, it is characterised in that：Described switching device also includes horizontal stroke
Cross sectional shape is the first magnetic conductor (5) of U-shaped, and described the first magnetic conductor (5) is set close to contact area, stationary contact (22)
Partly or wholly it is located in the die cavity of the first magnetic conductor (5), the opening (52) of the first magnetic conductor (5) is towards moving contact guide rod
(11), moving contact guide rod (11) is parallel to each other both when movable contact (12), stationary contact (22) contact with static contact guide rod (21),
Electronic suction between moving contact guide rod (11) and static contact guide rod (21) is strengthened by the first magnetic conductor (5).
A kind of 2. switching device according to claim 1, it is characterised in that described the first magnetic conductor (5) include a pair that
This side wall be arrangeding in parallel face-to-face (53) and a bottom for connecting a pair of side walls (53) be arrangeding in parallel that face each other
(51), side wall (53) sets up separately in moving contact guide rod (11) both sides, and bottom (51) are located at below moving contact guide rod (11).
3. a kind of switching device according to claim 1 or 2, it is characterised in that described switching device also includes tabular
The second magnetic conductor (6), one end of the length direction of described the second magnetic conductor (6) extends to the die cavity of the first magnetic conductor (5)
Interior and with the first magnetic conductor (5) bottom (51) is fixed, the other end of the length direction of the second magnetic conductor (6) and described stationary contact
Head guide rod (21) is fixed, the second magnetic conductor（6）One end of length direction and the fixing point of the other end be located at stationary contact respectively
(22) the left and right sides.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510918699.4A CN105405686B (en) | 2015-12-14 | 2015-12-14 | A kind of switching device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510918699.4A CN105405686B (en) | 2015-12-14 | 2015-12-14 | A kind of switching device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105405686A CN105405686A (en) | 2016-03-16 |
| CN105405686B true CN105405686B (en) | 2017-12-29 |
Family
ID=55471108
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510918699.4A Active CN105405686B (en) | 2015-12-14 | 2015-12-14 | A kind of switching device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105405686B (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3560683A (en) * | 1968-01-24 | 1971-02-02 | Westinghouse Electric Corp | Circuit breaker with improved contact structure |
| FR2283541A1 (en) * | 1973-07-30 | 1976-03-26 | Baco Const Elect | Circuit breaker with thermal release and magnetic relay - has coil spring to provide contact bias and quick separation |
| JPH02132716A (en) * | 1988-11-12 | 1990-05-22 | Toshiba Corp | Circuit breaker |
| CN101022064A (en) * | 2007-03-08 | 2007-08-22 | 常熟开关制造有限公司(原常熟开关厂） | Plastic case circuit breaker |
| CN101315852A (en) * | 2007-05-29 | 2008-12-03 | 浙江正泰电器股份有限公司 | Contact system of plastic case breaker |
| CN102592906A (en) * | 2012-02-22 | 2012-07-18 | 西安交通大学 | Medium-pressure and high-capacity DC circuit breaker contact terminal system for improving short time endurance capability |
| CN204289305U (en) * | 2014-12-25 | 2015-04-22 | 常熟开关制造有限公司(原常熟开关厂） | The contact system of low-voltage circuit breaker |
| CN205194541U (en) * | 2015-12-14 | 2016-04-27 | 常熟开关制造有限公司(原常熟开关厂） | Switch device |
-
2015
- 2015-12-14 CN CN201510918699.4A patent/CN105405686B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3560683A (en) * | 1968-01-24 | 1971-02-02 | Westinghouse Electric Corp | Circuit breaker with improved contact structure |
| FR2283541A1 (en) * | 1973-07-30 | 1976-03-26 | Baco Const Elect | Circuit breaker with thermal release and magnetic relay - has coil spring to provide contact bias and quick separation |
| JPH02132716A (en) * | 1988-11-12 | 1990-05-22 | Toshiba Corp | Circuit breaker |
| CN101022064A (en) * | 2007-03-08 | 2007-08-22 | 常熟开关制造有限公司(原常熟开关厂） | Plastic case circuit breaker |
| CN101315852A (en) * | 2007-05-29 | 2008-12-03 | 浙江正泰电器股份有限公司 | Contact system of plastic case breaker |
| CN102592906A (en) * | 2012-02-22 | 2012-07-18 | 西安交通大学 | Medium-pressure and high-capacity DC circuit breaker contact terminal system for improving short time endurance capability |
| CN204289305U (en) * | 2014-12-25 | 2015-04-22 | 常熟开关制造有限公司(原常熟开关厂） | The contact system of low-voltage circuit breaker |
| CN205194541U (en) * | 2015-12-14 | 2016-04-27 | 常熟开关制造有限公司(原常熟开关厂） | Switch device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105405686A (en) | 2016-03-16 |
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