CN101447374B - Solenoid type electromagnetic trip - Google Patents
Solenoid type electromagnetic trip Download PDFInfo
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- CN101447374B CN101447374B CN2008102441287A CN200810244128A CN101447374B CN 101447374 B CN101447374 B CN 101447374B CN 2008102441287 A CN2008102441287 A CN 2008102441287A CN 200810244128 A CN200810244128 A CN 200810244128A CN 101447374 B CN101447374 B CN 101447374B
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- iron core
- spring
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Abstract
The invention relates to a solenoid type electromagnetic trip, which belongs to the technical field of the low-voltage apparatus. The solenoid type electromagnetic trip comprises a knob, an adjusting rod, a spring, a moving iron core, a static iron core, a coil, a concentrating flux plate and a magnetic yoke and is characterized in that a push rod pivotally arranged at the upper end part of the magnetic yoke is also included, wherein, one end of the spring is connected with the adjusting rod, the other end of the spring is connected with the push rod, and the upper end of the moving iron core is movably connected with the push rod after penetrating the concentrating flux plate. The invention has the advantages that the linear regulation of the current setting value for the short circuit action is realized by adjusting the length of the spring through the knob; since the adjusting screw component is arranged on the magnetic yoke, the magnetic gap can be adjusted finely, the inconsistency of the current setting values of all the trips due to the parts and the assembly is eliminated, and the consistency of the initial states of all the trips is ensured; and at least one hanging hook is arranged on the upper edge of the push rod, so that the specification of the spring is reduced when the multi-gear adjustment is realized.
Description
Technical field
The present invention relates to a kind of breaker of plastic casing solenoid type electromagnetic trip, is to the improvement of existing solenoid type electromagnetic trip structure, belongs to the low voltage electrical apparatus technology field.
Background technology
At present, existing solenoid type electromagnetic trip, its structure is disclosed by Fig. 1, it mainly comprises moving iron core 4, static iron core 41, spring 3, coil 44, yoke 5, described spring 3 is installed between moving iron core 4 and the static iron core 41, and be arranged on plastic sheath 43 inside that are used to make insulation between dynamic and static iron core 4,41 and the coil 44, the deficiency that this structure exists is: the setting value of short circuit operating current is non-adjustable.
Again, U.S.'s patent of invention numbers 5467069 discloses " a kind of adjustable release unit ", what this patented technology adopted is the solenoid type electromagnetic trip that is made of moving iron core, static iron core, magnetic conductive board, yoke, and its problem to be solved is: realize the adjusting of circuit breaker instantaneous trip current setting by regulating gap between the dynamic and static iron core.But one of shortcoming that exists, because the adjusting of magnetic gap is not easy control, and the linearity is bad, reality during streamline is produced in batches disposable qualification rate very low; Shortcoming two, because the influence of aspects such as part tolerance and assembling, be easy to cause in the circuit breaker the inconsistent of initial condition between each phase release.
Summary of the invention
The objective of the invention is to provide a kind of adjustable and solenoid type electromagnetic trip that can realize linear regulation of setting value of short circuit operating current.
The object of the present invention is achieved like this: a kind of solenoid type electromagnetic trip, comprise knob, adjusting rod, spring, moving iron core, static iron core, coil, magnetic conductive board, and yoke, described knob is installed on the interior support of circuit breaker pedestal, described adjusting rod hub setting contacts on described support and with knob, coil is arranged on the inside of yoke, static iron core is fixed on the bottom of yoke and places in the coil, moving iron core is positioned at the top of static iron core and can moves up and down in coil, the magnetic conductive board cap seal is on the top of yoke, be characterized in: also comprise the push rod of a hub setting in the yoke upper end, one end of described spring is connected with adjusting rod, the other end of spring is connected with push rod, the upper end of described moving iron core constitutes flexible connection with push rod after passing magnetic conductive board, extended push rod on the described push rod, described push rod contacts with support component.
Support component of the present invention is a bending, and this bending is arranged on the top of yoke, is used for contacting with described push rod.
Support component of the present invention is an adjustment screw, and this adjustment screw is made up of nut, screw, and nut is fixed on the top of yoke, and screw contacts with described push rod after passing nut, yoke.
The bottom of knob of the present invention is provided with screw inclined plane.
The present invention has extended a projection on described adjusting rod, adjusting rod contacts by the screw inclined plane of projection with described knob bottom.
The present invention has also extended first hook on described adjusting rod, an end of described spring is connected on described first hook.
Push rod of the present invention is provided with at least one second hook, and the other end of described spring is connected on described second hook.
Spring of the present invention is extension spring.
The present invention is equipped with a minor axis in the end, upper end of described moving iron core, and offers sliding tray on described push rod, and minor axis places in the sliding tray, can realize the upper end of moving iron core and the flexible connection between the push rod by being slidingly matched between minor axis and the sliding tray.
The present invention is because after adopting said structure, one of advantage that has, the length of coming regulating spring by knob, adjusting rod, realize the adjusting of short circuit operating current setting value,, therefore realized the linear regulation of short circuit operating current setting value because spring force is directly proportional (f=kx) with spring length; Advantage two, by adjustment screw is set on yoke, can finely tune magnetic gap, eliminated inconsistent by part itself, each phase release current setting of causing of assembling, guaranteed the consistency of each phase release initial condition; Advantage three, by on push rod, extending at least one hook, according to principle of moment balance, when coil flows through big electric current, the suction of dynamic and static iron core is big, and spring can be hung on the long hook of the arm of force, and when coil flows through little electric current, the suction of dynamic and static iron core is little, spring can be hung on the short hook of the arm of force, therefore, has reduced the specification of spring when realizing many grades of adjustings.
Description of drawings
Fig. 1 is the partial sectional view of solenoid type electromagnetic trip in the prior art.
Fig. 2 is the structural representation of the preferred solenoid type electromagnetic trip of the present invention.
Fig. 3 is the cutaway view of the preferred solenoid type electromagnetic trip of the present invention.
Fig. 4 is an application examples schematic diagram of the present invention.
Embodiment
For make your auditor particularly the public can be well understood to structure essence of the present invention and effective effect thereof more; the spy reaches embodiment in conjunction with the accompanying drawings the specific embodiment of the present invention is described in detail as follows; but all descriptions to embodiment all do not constitute the restriction to technical scheme of the present invention, and are any pro forma but not substantial equivalence is replaced or notion changes and all should be considered as technical scheme scope disclosed in this invention and the prescription protection.
Embodiment
See also Fig. 2 and in conjunction with Fig. 3, solenoid type electromagnetic trip of the present invention mainly comprises knob 1, adjusting rod 2, spring 3, moving iron core 4, static iron core 41, plastic sheath 43, coil 44, magnetic conductive board 45, yoke 5, push rod 7 and support component.Described knob 1 is installed on the interior support 6 of circuit breaker pedestal, is provided with screw inclined plane 11 in the bottom of knob 1.The hub setting rotationally of described adjusting rod 2 is on support 6, radially extended a projection 21 in the middle part of a side at adjusting rod 2, adjusting rod 2 contacts by the screw inclined plane 11 of projection 21 with described knob 1 bottom, on adjusting rod 2 opposite side radially, also extend an end that is useful on ammunition feed spring 3 and collude first hook 22 of joining, the quantity of described first hook 22 is identical with the number of poles of circuit breaker, illustrated among the figure that the quantity of first hook 22 is four, can be applicable on the four-pole circuit breaker, and for one pole, two utmost points, three-pole breaker, as long as change the quantity of first hook 22 on the adjusting rod 2, as single-pole circuit breaker, it is one corresponding to the quantity of the hook of first on the adjusting rod 2 22; Two utmost point circuit breakers are two corresponding to the quantity of first on the adjusting rod 2 hook 22 ... the rest may be inferred.Described coil 44 is arranged on the inside of yoke 5, one end of coil 44 is connected with first joint cover 12, the other end of coil 44 is connected with second joint cover 13, first joint cover 12 is used for realizing being electrically connected with subscriber's line, second joint cover 13 is used for realizing being electrically connected with the contact system (belong to known technology, omit among the figure) of circuit breaker.Described static iron core 41 is fixed on the bottom of yoke 5 and places in the coil 44, moving iron core 4 is positioned at the top of static iron core 41 and can moves up and down in coil 44 inside corresponding to static iron core 41, and the upper end of moving iron core 4 realizes flexibly connecting with push rod 7 in magnetic conductive board 45 backs at yoke 5 tops passing cap seal.Described plastic sheath 43 has been used for insulating effect every being located between coil 44 and the dynamic and static iron core 4,41; Described push rod 7 passes through axle 74 hub settings rotationally at push rod 7 two ends in the upper end of yoke 5, is provided with push rod 71 on the top of push rod 7, is provided with a pair of second hook 72 and the sliding tray 73 on a side side of push rod 7, and push rod 71 contacts with support component.Described support component can be a bending 51, and this bending 51 is arranged on the top of yoke 5, is used for contacting with described push rod 71; Described support component also can be adjustment screw 52, this adjustment screw 52 is made up of nut 521, screw 522, nut 521 is fixed on the top of yoke 5, screw 522 contacts with described push rod 71 after passing nut 521, yoke 5, and support component of the present invention is preferably adjustment screw 52.First hook 22 that extends on one end of described spring 3 and the adjusting rod 2 is connected, a pair of second on the other end of spring 3 and the push rod 7 linked up with arbitrary second in 72 and linked up with 72 and be connected.The end of described moving iron core 4 is equipped with a minor axis 42, this minor axis 42 hold in the sliding tray 73 that fits on the push rod 7 and between the two structure for being slidingly matched.
Application examples
See also Fig. 4, clockwise adjusting knob 1, adjusting rod 2 rotates counterclockwise with the hub setting center, makes spring 3 elongations, and according to f=kx, the counter-force f that spring 3 provides increases, and push rod 7 keeps balance under the acting in conjunction of spring 3 and adjustment screw 52.When circuit breaker is installed on the subscriber's line, electric current flows through the coil 44 of release inside, make the moving of coil 44 inside, static iron core 4,41 produce electromagnetic attraction, when circuit is short-circuited fault, the electromagnetic attraction that short-circuit current produces is greater than the spring counter-force, moving iron core 4 moves downward, the minor axis 42 of moving iron core 4 ends slides in the sliding tray 73 of push rod 7, and driving push rod 7 is that the center rotates counterclockwise with axle 74, the draw bar 8 that the push rod 71 that extends on the push rod 7 is finally actuated circuit breaker is that the center clockwise rotates with draw bar axle center 81, make lever 9 actions that cooperate with draw bar 8, thereby drive circuit breaker operation mechanism and (belong to known technology, omit among the figure) release, circuit breaker trip.
The present invention has been determined the suction of 4,41 of dynamic and static iron cores by the size of current that flows through coil 44, the suction that dynamic and static iron core is 4,41 will overcome the spring counter-force could finally make circuit breaker trip, therefore, come the length of regulating spring 3 by adjusting knob 1, to realize adjusting, promptly to the adjusting of short circuit operating current value size to the circuit breaker trip current setting.Similarly, by rotating the screw 522 of adjustment screw 52, making push rod 7 is the center fine motion with axle 74, drive moving iron core 4 fine motions, thereby reach the purpose of fine setting magnetic gap, elimination is inconsistent by part itself, each phase release current setting of causing of assembling, has guaranteed the consistency of each phase release initial condition.
Claims (9)
1. solenoid type electromagnetic trip, comprise knob (1), adjusting rod (2), spring (3), moving iron core (4), static iron core (41), coil (44), magnetic conductive board (45), and yoke (5), described knob (1) is installed on the interior support (6) of circuit breaker pedestal, described adjusting rod (2) hub setting upward and with knob (1) contacts at described support (6), coil (44) is arranged on the inside of yoke (5), static iron core (41) is fixed on the bottom of yoke (5) and places in the coil (44), moving iron core (4) is positioned at the top of static iron core (41) and can moves up and down in coil (44), magnetic conductive board (45) cap seal is on the top of yoke (5), it is characterized in that also comprising the push rod (7) of a hub setting in yoke (5) upper end, one end of described spring (3) is connected with adjusting rod (2), the other end of spring (3) is connected with push rod (7), the upper end of described moving iron core (4) constitutes flexible connection with push rod (7) after passing magnetic conductive board (45), extended push rod (71) on the described push rod (7), described push rod (71) contacts with support component.
2. solenoid type electromagnetic trip according to claim 1 is characterized in that described support component is a bending (51), and this bending (51) is arranged on the top of yoke (5), is used for contacting with described push rod (71).
3. solenoid type electromagnetic trip according to claim 1, it is characterized in that described support component is adjustment screw (52), this adjustment screw (52) is made up of nut (521), screw (522), nut (521) is fixed on the top of yoke (5), and screw (522) contacts with described push rod (71) after passing nut (521), yoke (5).
4. solenoid type electromagnetic trip according to claim 1 is characterized in that the bottom of described knob (1) is provided with screw inclined plane (11).
5. according to claim 1 or 4 described solenoid type electromagnetic trips, it is characterized in that having extended a projection (21) on described adjusting rod (2), adjusting rod (2) contacts by the screw inclined plane (11) of projection (21) with described knob (1) bottom.
6. solenoid type electromagnetic trip according to claim 1 is characterized in that also having extended first hook (22) on described adjusting rod (2), an end of described spring (3) is connected on described first hook (22).
7. solenoid type electromagnetic trip according to claim 1 is characterized in that described push rod (7) is provided with at least one second hook (72), and the other end of described spring (3) is connected on described second hook (72).
8. solenoid type electromagnetic trip according to claim 1 is characterized in that described spring (3) is extension spring.
9. solenoid type electromagnetic trip according to claim 1, it is characterized in that a minor axis (42) being installed in the end, upper end of described moving iron core (4), and on described push rod (7), offer sliding tray (73), minor axis (42) places in the sliding tray (73), can realize the end of moving iron core (4) and the flexible connection between the push rod (7) by being slidingly matched between minor axis (42) and the sliding tray (73).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008102441287A CN101447374B (en) | 2008-12-11 | 2008-12-11 | Solenoid type electromagnetic trip |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008102441287A CN101447374B (en) | 2008-12-11 | 2008-12-11 | Solenoid type electromagnetic trip |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101447374A CN101447374A (en) | 2009-06-03 |
| CN101447374B true CN101447374B (en) | 2011-04-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008102441287A Active CN101447374B (en) | 2008-12-11 | 2008-12-11 | Solenoid type electromagnetic trip |
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| Country | Link |
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| CN (1) | CN101447374B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201773800U (en) * | 2010-02-04 | 2011-03-23 | 上海良信电器股份有限公司 | Solenoid adjustable electromagnetic tripping device |
| CN103730297B (en) * | 2014-01-17 | 2015-12-30 | 贵州长征开关制造有限公司 | A kind of trip gear adjustable for the protection class in breaker of plastic casing |
| CN107516622B (en) * | 2016-06-15 | 2020-05-29 | 施耐德电器工业公司 | Electromagnetic release |
| CN110739191B (en) * | 2018-07-20 | 2022-03-04 | 施耐德电器工业公司 | Electromagnetic release |
| CN114496602B (en) * | 2022-02-18 | 2024-01-09 | 薛京 | Circuit breaker operating mechanism |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4973928A (en) * | 1989-03-31 | 1990-11-27 | Westinghouse Electric Corp. | Extender spring for increased magnetic trip settings |
| CN1790583A (en) * | 2005-12-07 | 2006-06-21 | 上海电器科学研究所（集团）有限公司 | Thermomagnetic type release and its current adjusting knob |
| CN201311895Y (en) * | 2008-12-11 | 2009-09-16 | 常熟开关制造有限公司(原常熟开关厂） | Screwed pipe type electromagnetic trip device |
-
2008
- 2008-12-11 CN CN2008102441287A patent/CN101447374B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4973928A (en) * | 1989-03-31 | 1990-11-27 | Westinghouse Electric Corp. | Extender spring for increased magnetic trip settings |
| CN1790583A (en) * | 2005-12-07 | 2006-06-21 | 上海电器科学研究所（集团）有限公司 | Thermomagnetic type release and its current adjusting knob |
| CN201311895Y (en) * | 2008-12-11 | 2009-09-16 | 常熟开关制造有限公司(原常熟开关厂） | Screwed pipe type electromagnetic trip device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101447374A (en) | 2009-06-03 |
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