CN114334553B - Molded case circuit breaker operating mechanism - Google Patents
Molded case circuit breaker operating mechanism Download PDFInfo
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- CN114334553B CN114334553B CN202011062795.0A CN202011062795A CN114334553B CN 114334553 B CN114334553 B CN 114334553B CN 202011062795 A CN202011062795 A CN 202011062795A CN 114334553 B CN114334553 B CN 114334553B
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- 238000000034 method Methods 0.000 claims abstract description 5
- 230000009286 beneficial effect Effects 0.000 abstract description 4
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 238000009434 installation Methods 0.000 description 8
- 238000012423 maintenance Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 2
- 239000004020 conductor Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 230000016507 interphase Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000001681 protective effect Effects 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) are connected with lever (2), its characterized in that: the handle (1) is linked with the jump buckle (3) through the lever (2) to apply a bottom-up driving force to the jump buckle (3) so that the jump buckle (3) rotates, the jump buckle (3) can be linked with the lock catch (4) to lock and unlock the mechanism in the rotating process, or the moving contact (6) is driven to rotate through the four-bar structure driving rotating shaft (5), and the moving contact (6) is contacted with and separated from the fixed contact (7) to realize the connection and disconnection of the molded case circuit breaker. The supporting frame is fixed on the middle cover of the product, and the rotating shaft contact assembly and the mechanism assembly form an independent module, so that the mechanism can be disassembled and assembled independently more conveniently. Meanwhile, the design of a single four-bar mechanism is more beneficial to ensuring the stability of products and is convenient for production.
Description
Technical Field
The invention belongs to the technical field of circuit breakers, and particularly relates to a molded case circuit breaker operating mechanism.
Background
The moulded case circuit breaker is a kind of protective device for circuit of voltage, possessing overload, short circuit and undervoltage protection functions. Circuit breakers are of a wide variety, with molded case circuit breakers being relatively common, and the housing employs a plastic insulator for isolating the metal parts from the conductors and from ground. When the current exceeds a set value, the molded case circuit breaker can automatically cut off the current, and plays a role in protecting the load.
The common moulded case circuit breaker operating mechanism in the market at present often fixes the supporting frame on the base, and pivot, moving contact and four-bar linkage are as whole subassembly, install in the inside of base cavity. The structure is inconvenient to detach, and when the operating mechanism needs to be maintained, the parts of all the functional parts need to be detached in sequence, so that the detachment difficulty is increased.
Chinese patent ZL201820936981.4 discloses an optimized circuit breaker layout structure, including arc extinguishing system, stationary contact, moving contact, mechanism, release and pivot, still include left lid and right lid, left lid and right lid dock each other in left and right direction and form overall structure, and release and mechanism are located outside overall structure, and arc extinguishing system, stationary contact, moving contact and pivot are located overall structure. The patent technology also provides an optimized breaker layout structure with an N-level structure, N is more than or equal to 2 and less than or equal to 4, the 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 integral structure. The technology has good isolation performance; excellent insulation capability between the interphase and the in-out line; the breaking capacity is higher under the high voltage level; the difficult problem of particle blowback is solved. But in this technical scheme, be fixed in the support frame on the base, pivot, moving contact and four-bar linkage are as whole subassembly, install in the base cavity inside, and spare part installation is complicated, and the maintenance is dismantled the degree of difficulty greatly.
Disclosure of Invention
The invention aims at solving the technical defects that the existing molded case circuit breaker operating mechanism is complex in component installation and high in maintenance and disassembly difficulty, and provides the molded case circuit breaker operating mechanism which is characterized in that a supporting rack is fixed on a product middle cover, a rotating shaft contact assembly and a mechanism assembly form an independent module, and the mechanism is more convenient to be disassembled and assembled independently. Meanwhile, the design of a single four-bar mechanism is more beneficial to ensuring the stability of products and is convenient for production.
Technical proposal
In order to achieve the technical purpose, the invention provides a molded case circuit breaker operating mechanism, which comprises a handle, wherein the handle is connected with a lever, and is characterized in that: the handle is linked with the jump buckle through a lever to apply a bottom-up driving force to the jump buckle so as to enable the jump buckle to rotate, the jump buckle can be linked with the lock buckle to lock and unlock the mechanism in the rotating process, or the four-bar structure drives the rotating shaft to drive the moving contact to rotate, and the moving contact is contacted with and separated from the fixed contact to realize the connection and disconnection of the molded case circuit breaker;
the lever is mounted on a frame that includes a pair of side plates mounted on the 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 moving contact and the rotating shaft, so that contact pressure is provided 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 disposed between the pair of side plates, and a sub-lever pivotally supported on the pair of side plates, the lever and the pair of side plates mutually restricting degrees of freedom of forward and backward movement in the horizontal direction.
Preferably, an included angle of 90 degrees to 180 degrees is formed between the connecting line from the rotation center of the lever to the top end of the main lever and the connecting line from the rotation center of the lever to the top end of the auxiliary lever.
Preferably, a spring is provided 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 is connected to the bottom of the auxiliary lever.
Preferably, the auxiliary lever is provided with an arc-shaped protrusion, the pair of side plates are provided with arc-shaped grooves corresponding to the arc-shaped protrusions, and the arc-shaped protrusions are positioned in the arc-shaped grooves to realize that the auxiliary lever is pivotally supported on the pair of side plates so as to limit the movement track of the lever on-off and release.
Preferably, the main lever and the auxiliary lever are in a U shape, the U-shaped side arm of the main lever and the U-shaped side arm of the auxiliary lever are mounted together in a fitting way, and the U-shaped side arm of the main lever is contacted with the inner side surfaces of the pair of side plates.
Preferably, a limiting block is arranged on the frame and can limit the rotating position of the jump buckle, and a limiting baffle plate is arranged on the frame and is in contact with the boss shaft to limit the rotating shaft.
Preferably, the handle is inserted through a notch arranged on the middle cover.
Advantageous effects
According to the operating mechanism of the molded case circuit breaker, the supporting rack is fixed on the middle cover of a product, and the rotating shaft, the contact assembly and the mechanism assembly form an independent module, so that the mechanism can be detached and assembled independently more conveniently. Meanwhile, the design of a single four-bar mechanism is more beneficial to ensuring the stability of products and is convenient for production. Meanwhile, the adjustment of the internal layout structure of the molded case circuit breaker is utilized to realize modular installation of all functional components in the molded case circuit breaker, and only the corresponding failed part is detached during installation or maintenance, so that the whole irrelevant functional components are not required to be detached, and the 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 schematic illustration of an operating mechanism lever in an embodiment of the present invention;
FIG. 3 is a schematic view of the mounting positions of the side plates 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 traction lever, the mechanism and the rotating shaft in an embodiment of the invention;
FIG. 5 is a schematic diagram showing the relative positions of the devices after the carrying buckle according to the embodiment of the present invention is completed;
FIG. 6 is a schematic diagram of the relative positions of the devices after the closing operation is completed;
FIG. 7 is a schematic diagram of a four bar linkage in an embodiment of the present invention;
FIG. 8 is a schematic view of the mounting position of the lever according to the embodiment of the present invention;
FIG. 9 is a schematic illustration of a lever in accordance with an embodiment of the present invention after installation;
FIG. 10 is a schematic view of the installation position of the spring according to the embodiment of the present invention;
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Examples
The embodiment of the invention provides an operating mechanism of a molded case circuit breaker, as shown in figures 1,2,3 and 4, the operating mechanism comprises a handle 1, wherein the handle 1 is connected with a lever 2, the handle 1 is linked with a jump button 3 through the lever 2 to apply a bottom-up driving force to the jump button 3 so as to enable the jump button 3 to rotate, the jump button 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 by a four-bar structure to drive a moving contact 6 to rotate, and the moving contact 6 is contacted with and separated from a fixed contact 7 to realize the connection and disconnection of the molded case circuit breaker.
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 being disposed between the pair of side plates, the auxiliary lever 2b being pivotally supported on the pair of side plates, the lever 2 and the pair of side plates mutually restricting the degree of freedom of the horizontal forward and backward movement. An included angle r of 90 degrees to 180 degrees is formed between the connecting line from the rotation center of the lever 2 to the top end of the main lever 2a and the 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 auxiliary lever 2b and the main shaft 13 to limit the position of the auxiliary 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 auxiliary 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 on-off and tripping movement track of the lever 2. The main lever 2a and the auxiliary lever 2b are U-shaped, the U-shaped side arms of the main lever 2a and the U-shaped side arms of the auxiliary lever 2b are fixedly mounted together through welding or riveting, and the U-shaped side arms of the main lever 2a are contacted 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 lock buckle 4 is mounted between the pair of side plates through a lock buckle pivot shaft 18, the lock buckle 4 and the jump buckle 3 are mutually matched for locking or unlocking a mechanism, the jump buckle 3 is pivotally connected with the lower end of a first connecting rod 11, the pivot 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 denoted as 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 denoted as B, the rotating shaft 5 is rotatably mounted between the pair of side plates, and the rotation center is denoted as O2; the connecting line O1A, the connecting line AB and the connecting line BO2 form a single four-bar mechanism, and the moving contact 6 is rotatably arranged on the rotating shaft 5. A contact spring for providing pretightening force is arranged between the moving contact 6 and the rotating shaft 5, and contact pressure is provided 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 button 3 is limited by a limiting block on the supporting frame 8, a tension is provided for the lever 2 by the spring 16, the lever is stable after contacting with the jump button 3, and the jump button 3 is stable after contacting with the limiting shaft 17; the rotating shaft 5 is limited by the contact of a limiting baffle on the supporting frame 8 and the boss shaft 14, so that the tripping states of the first connecting rod 11, the second connecting rod 12 and the rotating shaft 5 are determined.
In the carrying and buckling operation process of 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 around the hinge shaft 10, so that the jump buckle 3 and the lock catch 4 are mutually matched, after the carrying and buckling operation is finished, a pulling force is generated through the spring 16 between the lever 2 and the rotating shaft 5, and the jump buckle 3 and the lock catch 4 cannot be actively unlocked after being matched.
According to the operating mechanism of the molded case circuit breaker, the supporting rack is fixed on the middle cover of a product, and the rotating shaft contact assembly and the mechanism assembly form an independent module, so that the mechanism can be detached and assembled independently more conveniently. Meanwhile, the design of a single four-bar mechanism is more beneficial to ensuring the stability of products and is convenient for production. Meanwhile, the adjustment of the internal layout structure of the molded case circuit breaker is utilized to realize modular installation of all functional components in the molded case circuit breaker, and only the corresponding failed part is detached during installation or maintenance, so that the whole irrelevant functional components are not required to be detached, and the assembly and maintenance difficulty of the molded case circuit breaker is greatly reduced.
In the description of the present specification, the descriptions of the terms "one embodiment," "example," "specific example," and the like, 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 present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. 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, proportions, sizes, amounts, etc. shown in the drawings of the embodiments of the present invention are for illustration and description only, and should not be construed as limiting the invention, so that any structural modifications, proportional changes, or adjustments of size may fall within the scope of the invention without affecting the efficacy and achievement of the invention. Meanwhile, the terms such as "upper", "lower", "left", "right", "middle", "clockwise", "anticlockwise" and the like are used in the present specification for convenience of description, and are not intended to limit the scope of the present invention, and the relative relation changes or modifications thereof are considered to be within the scope of the present invention without substantial modification of the technical content.
Claims (9)
1. The utility model provides a moulded case circuit breaker operating device, it includes handle (1), handle (1) are connected with lever (2), its characterized in that: the handle (1) is linked with the jump buckle (3) through the lever (2) to apply a bottom-up driving force 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 the mechanism in the rotating process, or the rotating shaft (5) is driven through the four-bar structure to drive the moving contact (6) to rotate, and the moving contact (6) is contacted with and separated from the fixed contact (7) to realize the connection and disconnection of the molded case circuit breaker;
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);
The rotating shaft (5) is rotatably arranged between the pair of side plates, a contact spring for providing pretightening force is arranged between the moving contact (6) and the rotating shaft (5), and contact pressure is provided when the mechanism is switched on;
The lever (2) comprises a main lever (2 a) and an auxiliary lever (2 b), the main lever (2 a) is arranged between the pair of side plates, the auxiliary lever (2 b) is pivotally supported on the pair of side plates, and the lever (2) and the pair of side plates limit the freedom degree of horizontal forward and backward movement
The auxiliary lever (2 b) is provided with an arc-shaped convex part (2 b 01), the pair of side plates are provided with arc-shaped grooves (801) corresponding to the arc-shaped convex part (2 b 01), and the arc-shaped convex part (2 b 01) is positioned in the arc-shaped grooves (801) so as to realize that the auxiliary lever (2 b) is pivotally supported on the pair of side plates, thereby limiting the on-off and tripping movement track of the lever (2).
2. A molded case circuit breaker operating mechanism as in claim 1 wherein: the jump buckle (3) is rotatably arranged between a pair of side plates through a hinge shaft (10), the jump buckle (3) is pivotally connected 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 a rotating shaft (5) through a boss shaft (14), and the moving contact (6) is rotatably arranged on the rotating shaft (5).
3. A molded case circuit breaker operating mechanism as in claim 1 wherein: the traction rod (15), the lever (2) and the rotating shaft (5) are distributed left, middle and right.
4. A molded case circuit breaker operating mechanism as in claim 1 wherein: an included angle (r) of 90 degrees to 180 degrees is formed between the connecting line from the rotation center of the lever (2) to the top end of the main lever (2 a) and the connecting line from the rotation center of the lever (2) to the top end of the auxiliary lever (2 b).
5. A molded case circuit breaker operating mechanism as in claim 1 wherein: a spring (16) is arranged between the auxiliary lever (2 b) and the main shaft (13) to limit the position of the auxiliary lever (2 b) on the pair of side plates.
6. A molded case circuit breaker operating mechanism as in claim 5 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 auxiliary lever (2 b).
7. A molded case circuit breaker operating mechanism as in claim 1 wherein: the main lever (2 a) and the auxiliary lever (2 b) are U-shaped, the U-shaped side arms of the main lever (2 a) and the U-shaped side arms of the auxiliary lever (2 b) are attached and installed together, and the U-shaped side arms of the main lever (2 a) are contacted with the inner side surfaces of the pair of side plates.
8. A molded case circuit breaker operating mechanism as in claim 1 wherein: the frame (8) is provided with a limiting block which can limit the rotating position of the jump buckle (3), and the frame (8) is provided with a limiting baffle which is contacted with the boss shaft (14) to limit the rotating shaft (5).
9. A molded case circuit breaker operating mechanism as in 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 CN114334553B (en) | 2020-09-30 | 2020-09-30 | Molded case circuit breaker operating mechanism |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011062795.0A CN114334553B (en) | 2020-09-30 | 2020-09-30 | Molded case circuit breaker operating mechanism |
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| Publication Number | Publication Date |
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| CN114334553A CN114334553A (en) | 2022-04-12 |
| CN114334553B true CN114334553B (en) | 2024-07-16 |
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| CN202011062795.0A Active CN114334553B (en) | 2020-09-30 | 2020-09-30 | Molded case circuit breaker operating mechanism |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114334555A (en) * | 2020-09-30 | 2022-04-12 | 上海良信电器股份有限公司 | Operating mechanism assembly of molded case circuit breaker |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100914203B1 (en) * | 2007-08-10 | 2009-08-27 | 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 |
| CN106158529B (en) * | 2015-04-28 | 2018-10-23 | 上海电科电器科技有限公司 | The operating mechanism of breaker |
| CN111128618B (en) * | 2020-01-10 | 2024-08-09 | 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 |
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| 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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