CN114334553A - Moulded case circuit breaker operating device - Google Patents
Moulded case circuit breaker operating device Download PDFInfo
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- CN114334553A CN114334553A CN202011062795.0A CN202011062795A CN114334553A CN 114334553 A CN114334553 A CN 114334553A CN 202011062795 A CN202011062795 A CN 202011062795A CN 114334553 A CN114334553 A CN 114334553A
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- 230000003068 static effect Effects 0.000 claims abstract description 6
- 238000000034 method Methods 0.000 claims abstract description 5
- 230000002349 favourable effect Effects 0.000 abstract description 4
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 238000010586 diagram Methods 0.000 description 5
- 238000012423 maintenance Methods 0.000 description 4
- 238000009434 installation Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000004020 conductor Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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Abstract
The utility model provides a moulded case circuit breaker operating device, it includes handle (1), handle (1) is connected its characterized in that with lever (2): the handle (1) is linked with the jump buckle (3) through a lever (2) to apply a driving force from bottom to top to the jump buckle (3) so as to enable the jump buckle (3) to rotate, the jump buckle (3) can be linked with the lock catch (4) to lock and unlock a mechanism in the rotating process, or a four-bar structure drives a rotating shaft (5) to drive a moving contact (6) to rotate, and the moving contact (6) is in contact with and separated from a static contact (7), so that the on-off of the molded case circuit breaker is realized. The supporting rack is fixed on the product middle cover, the rotating shaft contact assembly and the mechanism assembly form an independent module, and the mechanism is more conveniently and independently disassembled and assembled. Meanwhile, the design of a single four-bar linkage is more favorable for ensuring the stability of the product and is convenient for production.
Description
Technical Field
The invention belongs to the technical field of circuit breakers, and particularly relates to an operating mechanism of a molded case circuit breaker.
Background
The moulded case circuit breaker is a low-voltage circuit protection device and has the functions of overload, short circuit and undervoltage protection. The circuit breakers are of various types, wherein the molded case circuit breakers are commonly used, and the housing adopts a plastic insulator for isolating the metal part from the conductor and grounding the metal part. When the current exceeds a set value, the molded case circuit breaker can automatically cut off the current, and the effect of protecting the load is achieved.
The supporting frame is fixed on the base by a common molded case circuit breaker operating mechanism in the market at present, and the rotating shaft, the moving contact and the four-bar mechanism are installed in a cavity of the base as an integral assembly. This kind of structure has the dismantlement inconvenient, when needs maintain operating device, needs to dismantle the spare part of each functional unit according to the preface and leads to dismantling the degree of difficulty and increase.
Chinese patent ZL201820936981.4 discloses an optimized circuit breaker layout structure, including arc extinguishing system, static contact, moving contact, mechanism, release and pivot, still include left lid and right lid, and left lid and right lid dock each other in left and right direction and form overall structure, and release and mechanism locate outside overall structure, and arc extinguishing system, static contact, moving contact and pivot are located overall structure. The patent technology also provides an optimized circuit breaker layout structure with an N-level structure, wherein N is more than or equal to 2 and less than or equal to 4, the circuit breaker layout structure comprises N integral structures, all the integral structures are arranged side by side, and the tripper and the mechanism are arranged outside any one integral structure. The patented technology has good isolation performance; excellent insulation capacity between phases and between inlet and outlet lines; the breaking capacity under high voltage level is higher; the problem of particle blowback is solved. However, in the technical scheme, the supporting rack is fixed on the base, the rotating shaft, the moving contact and the four-bar mechanism are installed in the cavity of the base as an integral assembly, the parts are complex to install, and the difficulty in maintenance and disassembly is high.
Disclosure of Invention
The invention aims to solve the technical defects that the existing molded case circuit breaker operating mechanism is complex in part installation and high in maintenance and disassembly difficulty, and provides the molded case circuit breaker operating mechanism. Meanwhile, the design of a single four-bar linkage is more favorable for ensuring the stability of the product and is convenient for production.
Technical scheme
In order to achieve the technical purpose, the operating mechanism of the molded case circuit breaker provided by the invention comprises a handle, wherein the handle is connected with a lever, and the operating mechanism is characterized in that: the handle is linked with the jump buckle through a lever to apply a driving force from bottom to top to the jump buckle so as to enable the jump buckle to rotate, the jump buckle can be linked with the lock catch to lock and unlock a mechanism in the rotation process of the jump buckle, or a rotating shaft is driven through a four-bar structure to drive a moving contact to rotate, the moving contact is contacted with and separated from a static contact, and the on-off of the molded case circuit breaker is realized;
the lever is mounted on a frame, which includes a pair of side plates mounted on a middle cover.
Preferably, the jump buckle is rotatably mounted between the pair of side plates through a hinge shaft, the jump buckle is pivotally connected with the lower end of the first connecting rod, the upper end of the first connecting rod is rotatably connected with the left end of the second connecting rod through a main shaft, the right end of the second connecting rod is rotatably connected with the rotating shaft through a boss shaft, and the moving contact is rotatably mounted on the rotating shaft.
Preferably, the rotating shaft is rotatably installed between the pair of side plates, and a contact spring for providing a pre-tightening force is arranged between the movable contact and the rotating shaft, so as to provide a contact pressure when the mechanism is switched on.
Preferably, the traction rod, the lever and the rotating shaft are distributed in a left-middle-right mode.
Preferably, the lever includes a main lever provided between the pair of side plates and an auxiliary lever pivotally supported on the pair of side plates, the lever and the pair of side plates mutually restricting a degree of freedom of the forward and backward movement in the horizontal direction.
Preferably, an included angle of 90-180 degrees is formed between a connecting line from the lever rotating center to the top end of the main lever and a connecting line from the lever rotating center to the top end of the auxiliary lever.
Preferably, a spring is arranged between the auxiliary lever and the main shaft to limit the position of the auxiliary lever on the pair of side plates.
Preferably, one end of the spring is connected to the main shaft, and the other end of the spring is connected to the bottom of the lever.
Preferably, an arc-shaped convex part is arranged on the auxiliary lever, an arc-shaped groove corresponding to the arc-shaped convex part is arranged on the pair of side plates, and the arc-shaped convex part is positioned in the arc-shaped groove to realize that the auxiliary lever is pivotally supported on the pair of side plates so as to limit the movement tracks of the lever for closing and opening the brake and releasing the brake.
Preferably, the main lever and the auxiliary lever are U-shaped, the U-shaped side arm of the main lever and the U-shaped side arm of the auxiliary lever are fitted together, and the U-shaped side arm of the main lever contacts with the inner side surfaces of the pair of side plates.
Preferably, the rack is provided with a limiting block capable of limiting the rotation position of the jump buckle, and the rack is provided with a limiting baffle plate which is in contact with the boss shaft to limit the rotating shaft.
Preferably, the handle is inserted through a slot arranged on the middle cover.
Advantageous effects
According to the plastic case circuit breaker operating mechanism provided by the invention, the supporting rack is fixed on the product middle cover, and the rotating shaft, the contact assembly and the mechanism assembly form an independent module, so that the mechanism is more convenient to be independently disassembled and assembled. Meanwhile, the design of a single four-bar linkage is more favorable for ensuring the stability of the product and is convenient for production. Meanwhile, each functional component inside the molded case circuit breaker can be installed in a modularized mode through adjustment of the internal layout structure of the molded case circuit breaker, and only the corresponding failed part needs to be detached when the molded case circuit breaker is installed or maintained, the whole unrelated functional component does not need to be detached, and assembly and maintenance difficulty of the molded case circuit breaker is greatly reduced.
Drawings
FIG. 1 is an exploded view of an operating mechanism according to an embodiment of the present invention;
FIG. 2 is a lever diagram of an operating mechanism according to an embodiment of the present invention;
FIG. 3 is a schematic view of the installation positions of the side plate and the middle cover of the support frame according to the embodiment of the invention;
FIG. 4 is a schematic diagram of the relative positions of the drawbar, mechanism, and shaft in an embodiment of the present invention;
FIG. 5 is a schematic diagram of relative positions of components after a buckle loading action is completed according to an embodiment of the invention;
FIG. 6 is a schematic diagram of relative positions of components after completion of a closing operation according to an embodiment of the present invention;
FIG. 7 is a schematic view of a four bar linkage in an embodiment of the present invention;
FIG. 8 is a schematic view showing the installation position of a lever according to an embodiment of the present invention;
FIG. 9 is a schematic diagram of the lever mounted position limit of the embodiment of the present invention;
FIG. 10 is a schematic view showing the mounting position of a spring according to an embodiment of the present invention;
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Examples
The embodiment of the invention provides an operating mechanism of a molded case circuit breaker, which comprises a handle 1, wherein the handle 1 is connected with a lever 2, the handle 1 is linked with a jump buckle 3 through the lever 2 to apply a driving force from bottom to top to the jump buckle 3 so as to enable the jump buckle 3 to rotate, the jump buckle 3 can be linked with a lock catch 4 to lock and unlock the mechanism in the rotating process, or a rotating shaft 5 is driven through a four-bar structure to drive a moving contact 6 to rotate, and the moving contact 6 is contacted with and separated from a static contact 7, so that the molded case circuit breaker is switched on and off.
Specifically, as shown in fig. 8,9 and 10, the lever 2 is mounted on a frame 8, and the frame 8 includes a pair of side plates mounted on a middle cover 9. The handle 1 is inserted into a notch arranged on the middle cover 9. The lever 2 includes a main lever 2a and an auxiliary lever 2b, the main lever 2a is disposed between the pair of side plates, the auxiliary lever 2b is pivotally supported on the pair of side plates, and the lever 2 and the pair of side plates mutually limit the degree of freedom of the front-rear movement in the horizontal direction. An included angle r of 90-180 degrees is formed between a connecting line from the rotation center of the lever 2 to the top end of the main lever 2a and a connecting line from the rotation center of the lever 2 to the top end of the auxiliary lever 2 b. A spring 16 is provided between the sub lever 2b and the main shaft 13 to restrict the position of the sub lever 2b on the pair of side plates. One end of the spring 16 is connected to the main shaft 13, and the other end is connected to the bottom of the lever 2 b. The auxiliary lever 2b is provided with an arc-shaped convex part 2b01, the pair of side plates are provided with arc-shaped grooves 801 corresponding to the arc-shaped convex part 2b01, and the arc-shaped convex part 2b01 is positioned in the arc-shaped grooves 801 to realize that the auxiliary lever 2b is pivotally supported on the pair of side plates so as to limit the movement tracks of closing and opening of the lever 2 and tripping of the lever. The main lever 2a and the auxiliary lever 2b are U-shaped, the U-shaped side arm of the main lever 2a and the U-shaped side arm of the auxiliary lever 2b are fixedly mounted together by welding or riveting, and the U-shaped side arm of the main lever 2a is in contact with the inner side surfaces of the pair of side plates.
As shown in fig. 1, 5, 6 and 7, the jump buckle 3 is rotatably mounted between the pair of side plates through a hinge shaft 10, the buckle 4 is mounted between the pair of side plates through a buckle pivot shaft 18, the buckle 4 and the jump buckle 3 are mutually matched for locking or unlocking the mechanism, the jump buckle 3 is pivotally connected with the lower end of a first connecting rod 11, the pivotal connection rotation center is O1, the upper end of the first connecting rod 11 is rotatably connected with the left end of a second connecting rod 12 through a main shaft 13, the rotation center is a, the right end of the second connecting rod 12 is rotatably connected with a rotating shaft 5 through a boss shaft 14, the rotation center is B, the rotating shaft 5 is rotatably mounted between the pair of side plates, and the rotation center is O2; the connecting line O1A, the connecting line AB and the connecting line BO2 form a single four-bar linkage, and the movable contact 6 is rotatably arranged on the rotating shaft 5. And a contact spring for providing pretightening force is arranged between the moving contact 6 and the rotating shaft 5, and provides contact pressure when the mechanism is switched on. The traction rod 15, the lever 2 and the rotating shaft 5 are distributed in a left-middle-right mode.
When the operating mechanism is in a free tripping state, the position of the jump buckle 3 is limited by a limiting block on the supporting rack 8, the lever 2 is provided with pulling force by the spring 16 and is kept stable after being contacted with the jump buckle 3, and the jump buckle 3 is kept stable after being contacted with the limiting shaft 17; the rotating shaft 5 is limited by the contact of the limit baffle on the supporting frame 8 and the boss shaft 14, so that the tripping state of the connecting rod I11, the connecting rod II 12 and the rotating shaft 5 is determined.
In the process of carrying and buckling the operating mechanism, the main lever 2a and the auxiliary lever 2b rotate from the rotation center A at the same time, the auxiliary lever 2b drives the jump buckle 3 to rotate by taking the hinge shaft 10 as the center, so that the jump buckle 3 is matched with the lock catch 4, and after carrying and buckling the operating mechanism, the spring 16 between the lever 2 and the main shaft 5 generates pulling force, so that the jump buckle 3 cannot be actively unlocked after being matched with the lock catch 4.
According to the molded case circuit breaker operating mechanism provided by the embodiment of the invention, the supporting rack is fixed on the product middle cover, and the rotating shaft contact assembly and the mechanism assembly form an independent module, so that the mechanism can be more conveniently and independently disassembled and assembled. Meanwhile, the design of a single four-bar linkage is more favorable for ensuring the stability of the product and is convenient for production. Meanwhile, each functional component inside the molded case circuit breaker can be installed in a modularized mode through adjustment of the internal layout structure of the molded case circuit breaker, and only the corresponding failed part needs to be detached when the molded case circuit breaker is installed or maintained, the whole unrelated functional component does not need to be detached, and assembly and maintenance difficulty of the molded case circuit breaker is greatly reduced.
In the description herein, references to the description of "one embodiment," "an example," "a specific example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The structures, ratios, sizes, quantities, and the like shown in the drawings of the embodiments of the present invention are only used for matching with the disclosure of the specification, so as to be understood and read by those skilled in the art, and are not used to limit the conditions under which the present invention can be implemented, so that the present invention has no technical significance. In addition, the terms such as "upper", "lower", "left", "right", "middle", "clockwise" and "counterclockwise" used in the present specification are for clarity of description only, and are not intended to limit the scope of the present invention, and the relative relationship between the terms and the terms is not limited by the technical contents of the substantial changes, but also considered to be the scope of the present invention.
Claims (12)
1. The utility model provides a moulded case circuit breaker operating device, it includes handle (1), handle (1) is connected its characterized in that with lever (2): the handle (1) is linked with the jump buckle (3) through a lever (2) to apply a driving force from bottom to top to the jump buckle (3) so as to enable the jump buckle (3) to rotate, the jump buckle (3) can be linked with the lock catch (4) to lock and unlock a mechanism in the rotating process, or a rotating shaft (5) is driven through a four-bar structure to drive a moving contact (6) to rotate, the moving contact (6) is in contact with and separated from a static contact (7), and the on-off of the molded case circuit breaker is realized;
the lever (2) is arranged on a frame (8), the frame (8) comprises a pair of side plates, and the pair of side plates are arranged on a middle cover (9).
2. The molded case circuit breaker operating mechanism of claim 1, wherein: the jump buckle (3) is rotatably arranged between the pair of side plates through a hinge shaft (10), the jump buckle (3) is in pivot connection with the lower end of a first connecting rod (11), the upper end of the first connecting rod (11) is rotatably connected with the left end of a second connecting rod (12) through a main shaft (13), the right end of the second connecting rod (12) is rotatably connected with the rotating shaft (5) through a boss shaft (14), and the moving contact (6) is rotatably arranged on the rotating shaft (5).
3. The molded case circuit breaker operating mechanism of claim 1, wherein: the rotating shaft (5) is rotatably arranged between the pair of side plates, and a contact spring used for providing pretightening force is arranged between the moving contact (6) and the rotating shaft (5) and provides contact pressure when the mechanism is switched on.
4. The molded case circuit breaker operating mechanism of claim 1, wherein: the traction rod (15), the lever (2) and the rotating shaft (5) are distributed in a left-middle-right mode.
5. The molded case circuit breaker operating mechanism of claim 1, wherein: the lever (2) comprises a main lever (2a) and an auxiliary lever (2b), the main lever (2a) is arranged between the pair of side plates, the auxiliary lever (2b) is pivotally supported on the pair of side plates, and the lever (2) and the pair of side plates mutually limit the degree of freedom of front and back movement in the horizontal direction.
6. The molded case circuit breaker operating mechanism of claim 5, wherein: an included angle (r) of 90-180 degrees is formed between a connecting line from the rotation center of the lever (2) to the top end of the main lever (2a) and a connecting line from the rotation center of the lever (2) to the top end of the auxiliary lever (2 b).
7. The molded case circuit breaker operating mechanism of claim 5, wherein: a spring (16) is arranged between the auxiliary lever (2b) and the main shaft (13) and used for limiting the position of the auxiliary lever (2b) on the pair of side plates.
8. The molded case circuit breaker operating mechanism of claim 7, wherein: one end of the spring (16) is connected to the main shaft (13), and the other end is connected to the bottom of the lever (2 b).
9. The molded case circuit breaker operating mechanism of claim 5, wherein: the auxiliary lever (2b) is provided with an arc-shaped convex part (2b01), the pair of side plates are provided with arc-shaped grooves (801) corresponding to the arc-shaped convex part (2b01), and the arc-shaped convex part (2b01) is positioned in the arc-shaped grooves (801) to realize that the auxiliary lever (2b) is pivotally supported on the pair of side plates so as to limit the movement tracks of the lever (2) for switching on and off and tripping.
10. The molded case circuit breaker operating mechanism of claim 5, wherein: the main lever (2a) and the auxiliary lever (2b) are U-shaped, the U-shaped side arm of the main lever (2a) and the U-shaped side arm of the auxiliary lever (2b) are attached together, and the U-shaped side arm of the main lever (2a) is in contact with the inner side surfaces of the pair of side plates.
11. The molded case circuit breaker operating mechanism of claim 1, wherein: the rotating position of the jump buckle (3) can be limited by the limiting block arranged on the rack (8), and the limiting baffle plate arranged on the rack (8) is in contact with the boss shaft (14) to limit the rotating shaft (5).
12. The molded case circuit breaker operating mechanism of claim 1, wherein: the handle (1) is inserted into a notch arranged on the middle cover (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011062795.0A CN114334553A (en) | 2020-09-30 | 2020-09-30 | Moulded case circuit breaker operating device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011062795.0A CN114334553A (en) | 2020-09-30 | 2020-09-30 | Moulded case circuit breaker operating device |
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| Publication Number | Publication Date |
|---|---|
| CN114334553A true CN114334553A (en) | 2022-04-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011062795.0A Pending CN114334553A (en) | 2020-09-30 | 2020-09-30 | Moulded case circuit breaker operating device |
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| CN (1) | CN114334553A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20090016342A (en) * | 2007-08-10 | 2009-02-13 | 엘에스산전 주식회사 | Mold cased circuit breaker with a contact on mechanism |
| CN203071022U (en) * | 2012-12-28 | 2013-07-17 | 常熟开关制造有限公司(原常熟开关厂） | Miniaturized circuit breaker operating mechanism |
| US20180122610A1 (en) * | 2015-04-28 | 2018-05-03 | Seari Electric Technology Co., Ltd. | Operation mechanism of circuit breaker |
| CN111128618A (en) * | 2020-01-10 | 2020-05-08 | 常熟开关制造有限公司(原常熟开关厂） | Operating mechanism of low-voltage molded case circuit breaker |
| CN212750753U (en) * | 2020-09-30 | 2021-03-19 | 上海良信电器股份有限公司 | Moulded case circuit breaker operating device |
-
2020
- 2020-09-30 CN CN202011062795.0A patent/CN114334553A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20090016342A (en) * | 2007-08-10 | 2009-02-13 | 엘에스산전 주식회사 | Mold cased circuit breaker with a contact on mechanism |
| CN203071022U (en) * | 2012-12-28 | 2013-07-17 | 常熟开关制造有限公司(原常熟开关厂） | Miniaturized circuit breaker operating mechanism |
| US20180122610A1 (en) * | 2015-04-28 | 2018-05-03 | Seari Electric Technology Co., Ltd. | Operation mechanism of circuit breaker |
| CN111128618A (en) * | 2020-01-10 | 2020-05-08 | 常熟开关制造有限公司(原常熟开关厂） | Operating mechanism of low-voltage molded case circuit breaker |
| CN212750753U (en) * | 2020-09-30 | 2021-03-19 | 上海良信电器股份有限公司 | Moulded case circuit breaker operating device |
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