CN102034652B - Operating mechanism for molded case circuit breaker - Google Patents
Operating mechanism for molded case circuit breaker Download PDFInfo
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- CN102034652B CN102034652B CN 201010600245 CN201010600245A CN102034652B CN 102034652 B CN102034652 B CN 102034652B CN 201010600245 CN201010600245 CN 201010600245 CN 201010600245 A CN201010600245 A CN 201010600245A CN 102034652 B CN102034652 B CN 102034652B
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- rotating shaft
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Abstract
The invention discloses an operating mechanism for a molded case circuit breaker, which comprises a handle, main tension springs, a bracket, a latch, a secondary buckle, an upper connecting rod, a lower connecting rod, a moving contact system and an accelerating breaking device. The accelerating breaking device comprises a tripper, a tripper rotating shaft and an energy storage spring, wherein the tripper is arranged on the tripper rotating shaft in a rotating way; the two ends of the tripper rotating shaft are fixed on the bracket; and one end of the energy storage spring is fixed, and the other end of the energy storage spring is connected to the tripper. When the circuit breaker is freely tripped, the energy storage spring can increase the rotating speed of the tripper to further increase the breaking speed of the whole mechanism. In switching-in and switching-off processes, as the tripper is buckled by the latch, the acting force of the energy storage spring may not increase the operating force of the handle in the switching-in and switching-off of the circuit breaker. In the operating mechanism, the breaking speed can be increased under the condition of not increasing the rigidity of the main tension springs, so the manufacturing cost of the operating mechanism is reduced and the service life of the operating mechanism is prolonged.
Description
Technical field
The present invention relates to low-pressure plastic shell circuit breaker, in particular, relate to the operating mechanism in low-pressure plastic shell circuit breaker.
Background technology
The operating mechanism of breaker of plastic casing is as the important part of breaker of plastic casing, is the emphasis of each large circuit breaker producer analysis and research always, and the basic principle of operating mechanism and primary structure are public in the industry.The user also constantly proposes higher requirement to the performance of circuit breaker, and such as requiring more reliable breaking capacity, lighter mode of operation, so each circuit breaker manufacturer also all continuing to optimize breaker mechanism, improves the breaking speed of breaker mechanism with this.
In technology in the past, circuit breaker operation mechanism is mainly by increasing the rigidity of mechanism's main extension spring, improving the breaking speed of circuit breaker.But on the whole, the increase limited space of mechanism's main extension spring rigidity, along with the increase of main extension spring rigidity, the needed operating physical force of circuit breaker user operating grip also increases accordingly, is not easy to user's operation; Simultaneously, the increase of mechanism's main extension spring rigidity has also improved requirement to material and the processing mode of mechanism element, cause the increase of cost, otherwise will descend the mechanical endurance of mechanism.
Therefore, just need a kind of new mechanical structure, can either effectively improve the breaking speed of breaker mechanism, the lever operated power when not increasing circuit-breaker switching on-off again simultaneously can not reduce the mechanical endurance of breaker mechanism.At present, also do not have the product of this structure to occur on market.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of operating mechanism of breaker of plastic casing, and tool accelerates break-up device, can effectively accelerate the movement velocity of circuit breaker tripping, and then can accelerate the breaking speed of whole operating mechanism.Meanwhile, this acceleration break-up device can not increase the operating physical force of handle divide-shut brake, can not affect the mechanical endurance of breaker mechanism yet.
In order to solve the problems of the technologies described above, the present invention adopts following technical scheme: a kind of operating mechanism of breaker of plastic casing, comprise handle, main extension spring, support, snap close, buckle again, upper connecting rod, lower link and movable contact system, comprise that also one accelerates break-up device, described acceleration break-up device comprises tripping, tripping rotating shaft and energy-stored spring, described tripping is installed in rotation on the tripping rotating shaft, the two ends of tripping rotating shaft are fixed on described support, one end of described energy-stored spring is fixed, and the other end is connected in tripping.
Preferably, described energy-stored spring is torsion spring, and described torsion spring set is on the tripping rotating shaft, and an end of torsion spring is against in tripping, and the other end is connected on a fixed position, such as support or support connecting axle etc.
Further, the afterbody of described tripping is provided with the spring base of a U-shaped, and described torsion spring is positioned at spring base, and an end of described torsion spring is against the bottom of spring base, and the other end is against on described support.
Further, on described tripping rotating shaft, a tripping locating part is installed also.
Further, described tripping locating part is also U-shaped, and the tripping locating part contacts with described spring base and each contacts with the inboard of support.
Preferably, described snap close and again the button respectively be arranged between described support by a bearing pin.
Preferably, fix a pin in described tripping, the upper end of described upper connecting rod is rotatably connected on described pin, and the lower end of upper connecting rod is hinged by the upper end of a pitman shaft and lower link, and the lower end of lower link is connected with described movable contact system.
Further, the upper end of described main extension spring is articulated on described handle, and the lower end of main extension spring is articulated on described pitman shaft.
Compared to the prior art, technique effect of the present invention is actively with significant.The present invention has increased the acceleration break-up device, and circuit breaker is in the trip free motion, and energy-stored spring can accelerate the velocity of rotation of tripping, and then has accelerated the breaking speed of whole mechanism.And in the motion process of separating brake and combined floodgate, fastened by snap close due to tripping, the active force of energy-stored spring can not increase that breaker mechanism divides, the operating physical force of handle when closing a floodgate.The present invention can be in the situation that do not increase main extension spring rigidity, quickening breaking speed, thereby the useful life of favourable manufacturing cost for reducing operating mechanism, raising operating mechanism.
Description of drawings
Below in conjunction with the drawings and specific embodiments, the present invention is described in further detail.
Fig. 1 is the perspective exploded view of operating mechanism of the present invention.
Fig. 2 is that tripping in the present invention, tripping rotating shaft, tripping locating part and the installation of energy-stored spring in support concern schematic diagram.
Fig. 3 is with the structural representation of operating mechanism of the present invention under gate-dividing state.
Fig. 4 is with the structural representation of operating mechanism of the present invention under "on" position.
Fig. 5 is with the structural representation of operating mechanism of the present invention under the trip free state.
Embodiment
As shown in Figure 1 and Figure 2, the operating mechanism of breaker of plastic casing comprises handle 1, main extension spring 2, support 3, tripping 4, snap close 5, buckles 6 again, upper connecting rod 7, lower link 8 and movable contact system 9, wherein, snap close 5 and detain again 6 and respectively be arranged between support 3 by a bearing pin.Fix a pin 41 in tripping 4, the upper end of upper connecting rod 7 is rotatably connected on described pin 41, and the lower end of upper connecting rod 7 is hinged by the upper end of a pitman shaft 13 and lower link 8, and the lower end of lower link 8 is connected with movable contact system 9.The upper end of main extension spring 2 is articulated on handle 1, and the lower end of main extension spring 2 is articulated on pitman shaft 13.This operating mechanism has three kinds of states in the course of work of circuit breaker: "on" position, gate-dividing state and trip free state, and when turning handle 1, can drive movable contact system 9 by main extension spring 2 and lower link 8 and rotate, realize closing a floodgate or separating brake; And when the protective device of circuit breaker moves, can make and trip between snap close 5 and tripping 4, the energy storage of main extension spring 2 is released, and also can drive movable contact system 9 to rotate, and realizes trip free.The said structure principle is the known technology of this area, and therefore not to repeat here.
In the present invention, described tripping 4, tripping rotating shaft 10 and one of the common formation of energy-stored spring 11 are accelerated break-up device, when the circuit breaker trip free, can accelerate the velocity of rotation of tripping 4.
As shown in Figure 1 and Figure 2, tripping 4 is installed in rotation on tripping rotating shaft 10, and the two ends of tripping rotating shaft 10 are fixed on support 3, and an end of energy-stored spring 11 is connected in tripping 4, the other end is connected on a fixed position, such as support or support connecting axle etc.When tripping 4 fastened with snap close 5, energy-stored spring 11 was in energy storage state, and at this moment, energy-stored spring 11 acts in tripping 4 clockwise moment (according to Fig. 1, direction shown in Figure 2).Adopt extension spring, stage clip or torsion spring all might reach this effect, but in a preferred embodiment of the present invention, adopt torsion spring as energy-stored spring 11.The afterbody of tripping 4 is provided with the spring base 42 of a U-shaped, described spring base 42 is installed in rotation on tripping rotating shaft 10, torsion spring 11 is enclosed within on tripping rotating shaft 10 and is positioned at spring base 42, and an end of torsion spring 11 is against the bottom of spring base 42, and the other end is against on support 3.
As shown in Figure 2, support 3 comprises two blocks of parallel side plates, and the two ends of described tripping rotating shaft 10 just are riveted on these two blocks of parallel side plates, and support 3 is fixed by screws on the base of circuit breaker.One tripping locating part 12 also is installed on tripping rotating shaft 10, is used for restriction tripping 4 endwisely slipping on tripping rotating shaft 10, assurance tripping 4 only has rotary freedom.Tripping locating part 12 can be made of one with tripping 4, can be also an independent part.In this preferred embodiment, tripping locating part 12 is U-shaped structures independently, that is to say, tripping locating part 12 is located on tripping rotating shaft 10 abreast with spring base 42, the inboard of tripping locating part 12 contacts with the inboard of spring base 42, and the outside of the outside of tripping locating part 12, spring base 42 respectively contacts with the inboard of 3 two blocks of side plates of support, thereby makes tripping 4 roughly be in the centre position of tripping rotating shaft 10.
As shown in Figure 3, when circuit breaker was in "on" position, snap close 5 was interlocked with tripping 4, and energy-stored spring 11 is in energy storage state.If pull handle under this state, handle 1 rotates under the effect of operating physical force F1.Under the effect of main extension spring 2, upper connecting rod 7, lower link 8 and movable contact system 9 rotate, and circuit breaker is realized separating brake, and this moment, the state of operating mechanism changed to Fig. 4 by Fig. 3.In this process, tripping 4, snap close 5, again detain 6 and energy-stored spring 11 still keep original state constant, therefore, energy-stored spring 11 can't affect operating physical force F1.
As shown in Figure 4, when circuit breaker was in gate-dividing state, handle 1 rotated under the effect of operating physical force F2.Under the effect of main extension spring 2, upper connecting rod 7, lower link 8 and movable contact system 9 rotate, and circuit breaker is realized closing a floodgate, and this moment, the state of operating mechanism changed to Fig. 3 by Fig. 4.In this process, tripping 4 is pinned by snap close 5 all the time, and energy-stored spring 11 also keeps original energy storage state always, and therefore, energy-stored spring 11 can not affect operating physical force F2 yet.
As shown in Figure 3; when circuit breaker is in "on" position; if place circuit generation current failure; the protective device of circuit breaker triggers and detains 6 again, trips between making snap close 5 and detaining 6 again, and then causes between tripping 4 and snap close 5 and trip; tripping 4 obtains rotary freedom; the energy of energy-stored spring 11 is released, and under the acting in conjunction of main extension spring 2 and energy-stored spring 11, tripping 4 rotary speeies only depended on the effect of main extension spring 2 to want fast more originally.Due to the quickening of tripping 4 rotary speeies, and then drive upper connecting rod 7 and accelerated with the responsiveness of lower link 8, thereby realized the quick disjunction of movable contact system 9 with fixed contact.Like this, circuit breaker has just been realized trip free, and the state of operating mechanism changes to Fig. 5 by Fig. 3.
Under trip free state shown in Figure 5, pull the process of buckleing again that handle can be completed mechanism, tripping 4 is fastened with snap close 5 again, in this process, also completed simultaneously the energy storage again of energy-stored spring 11.The state of operating mechanism changes to Fig. 4 by Fig. 5, and then can carry out closing operation.
Operation principle of the present invention is as follows: be in separating brake and combined floodgate motion process at circuit breaker, tripping is not rotated with the motion that divides, closes a floodgate of circuit breaker, and tripping and snap close are in closed position all the time.Described energy-stored spring is by energy storage at this moment, and spring-force driven dual is in tripping.Because tripping this moment maintains static, so the active force of energy-stored spring can not affect the operating physical force of breaker mechanism handle, and lever operated power is still only relevant with the mechanism main extension spring.When circuit breaker moves due to line fault generation trip free, to trip between snap close and tripping, tripping is rotated rapidly, and is driven upper and lower link motion under the effect of main extension spring and energy-stored spring, and dynamic and static contact separates, and circuit breaker is realized disjunction.In traditional circuit breaker operation mechanism, there is not described energy-stored spring, when circuit breaker moves due to line fault generation trip free, trip between snap close and tripping, the active force that acts in tripping only has the main extension spring pulling force, the velocity of rotation of tripping is slow than the present invention, and because the velocity of rotation of tripping is very important in the disjunction campaign of whole mechanism, so the breaking speed of traditional operation mechanism also wants slow than the present invention.
Above-described embodiment is to provide to those skilled in the art to be understood or realizes of the present invention; the people who is familiar with this area can make all modifications and variation to above-described embodiment in the situation that do not break away from inventive concept; thereby protection scope of the present invention do not limit by above-described embodiment, and is as the criterion with claims limited range.
Claims (7)
1. the operating mechanism of a breaker of plastic casing, comprise handle (1), main extension spring (2), support (3), snap close (5), detain again (6), upper connecting rod (7), lower link (8) and movable contact system (9), it is characterized in that, comprise that also one accelerates break-up device, described acceleration break-up device comprises tripping (4), tripping rotating shaft (10) and energy-stored spring (11), described tripping (4) is installed in rotation on tripping rotating shaft (10), the two ends of tripping rotating shaft (10) are fixed on described support (3), one end of described energy-stored spring (11) is fixed, the other end is connected in tripping (4), fix a pin (41) in described tripping (4), the upper end of described upper connecting rod (7) is rotatably connected on described pin (41), the lower end of upper connecting rod (7) is hinged by the upper end of a pitman shaft (13) and lower link (8), the lower end of lower link (8) is connected with described movable contact system (9).
2. operating mechanism according to claim 1, is characterized in that, described energy-stored spring (11) is torsion spring, and described torsion spring set is on tripping rotating shaft (10), and an end of torsion spring is against in tripping (4), and the other end is against on described support (3).
3. operating mechanism according to claim 2, it is characterized in that, the afterbody of described tripping (4) is provided with the spring base (42) of a U-shaped, and described torsion spring is positioned at spring base (42), one end of described torsion spring is against the bottom of spring base (42), and the other end is against on described support (3).
4. operating mechanism according to claim 3, is characterized in that, a tripping locating part (12) also is installed on described tripping rotating shaft (10).
5. operating mechanism according to claim 4, is characterized in that, described tripping locating part (12) is also U-shaped, and tripping locating part (12) contacts with described spring base (42) and each contacts with the inboard of support (3).
6. operating mechanism according to claim 1, is characterized in that, described snap close (5) and again the button (6) respectively be arranged between described support (3) by a bearing pin.
7. operating mechanism according to claim 1, is characterized in that, the upper end of described main extension spring (2) is articulated on described handle (1), and the lower end of main extension spring (2) is articulated on described pitman shaft (13).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010600245 CN102034652B (en) | 2010-12-22 | 2010-12-22 | Operating mechanism for molded case circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010600245 CN102034652B (en) | 2010-12-22 | 2010-12-22 | Operating mechanism for molded case circuit breaker |
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| Publication Number | Publication Date |
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| CN102034652A CN102034652A (en) | 2011-04-27 |
| CN102034652B true CN102034652B (en) | 2013-11-06 |
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| CN 201010600245 Active CN102034652B (en) | 2010-12-22 | 2010-12-22 | Operating mechanism for molded case circuit breaker |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103367054B (en) * | 2012-03-28 | 2016-06-08 | 上海良信电器股份有限公司 | The actuating mechanism of isolating switch |
| CN108962700A (en) * | 2018-08-08 | 2018-12-07 | 河北宝凯电气股份有限公司 | A kind of shielding arc-control device between contact of breaker |
| CN109243932B (en) * | 2018-10-11 | 2024-04-09 | 上海永继电气股份有限公司 | Breaker operating system |
| CN109616385B (en) * | 2018-12-25 | 2024-07-16 | 常有电气有限公司 | Miniature circuit breaker operating mechanism |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4835842A (en) * | 1987-04-23 | 1989-06-06 | General Electric Company | Method of assembling a molded case circuit breaker operating mechanism |
| CN2268306Y (en) * | 1996-07-23 | 1997-11-19 | 方龙华 | Residual current cut-off device |
| CN101231926A (en) * | 2008-02-21 | 2008-07-30 | 江苏西蒙智控设备有限公司 | Actuating mechanism of small size circuit breaker |
| CN201242982Y (en) * | 2008-07-15 | 2009-05-20 | 浙江正泰电器股份有限公司 | Operating mechanism of low-voltage circuit breaker |
| CN201898099U (en) * | 2010-12-22 | 2011-07-13 | 上海良信电器股份有限公司 | Operating mechanism of molded case circuit breaker |
-
2010
- 2010-12-22 CN CN 201010600245 patent/CN102034652B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4835842A (en) * | 1987-04-23 | 1989-06-06 | General Electric Company | Method of assembling a molded case circuit breaker operating mechanism |
| CN2268306Y (en) * | 1996-07-23 | 1997-11-19 | 方龙华 | Residual current cut-off device |
| CN101231926A (en) * | 2008-02-21 | 2008-07-30 | 江苏西蒙智控设备有限公司 | Actuating mechanism of small size circuit breaker |
| CN201242982Y (en) * | 2008-07-15 | 2009-05-20 | 浙江正泰电器股份有限公司 | Operating mechanism of low-voltage circuit breaker |
| CN201898099U (en) * | 2010-12-22 | 2011-07-13 | 上海良信电器股份有限公司 | Operating mechanism of molded case circuit breaker |
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| CN102034652A (en) | 2011-04-27 |
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