CN107331584B - Tripping mechanism of molded case circuit breaker - Google Patents
Tripping mechanism of molded case circuit breaker Download PDFInfo
- Publication number
- CN107331584B CN107331584B CN201710542823.0A CN201710542823A CN107331584B CN 107331584 B CN107331584 B CN 107331584B CN 201710542823 A CN201710542823 A CN 201710542823A CN 107331584 B CN107331584 B CN 107331584B
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- CN
- China
- Prior art keywords
- circuit breaker
- locking mechanism
- trip
- latch
- molded case
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
- H01H71/10—Operating or release mechanisms
Abstract
The invention discloses a tripping mechanism of a molded case circuit breaker, which is characterized by comprising an X-shaped locking mechanism, wherein the locking mechanism is fixedly connected with a spring frame structure on the outer side of the locking mechanism, a tripping rod locked by the locking mechanism through the operation of an operating mechanism of the molded case circuit breaker is arranged at the top of the locking mechanism, and a tripping rod which enables the locking mechanism to be opened and closed through horizontal movement so as to trip the molded case circuit breaker is arranged on one side of the locking mechanism. The tripping mechanisms of the invention are connected in an occlusion mode, so that the phenomenon of sliding and buckling after the mechanisms are buckled is greatly reduced. The protective curtain is arranged at the joint of the locking mechanism and the trip bar, so that the breaker is more resistant to external impact and more reliable, and has great practicability for the plastic shell circuit breaker for warships.
Description
Technical Field
The invention relates to a tripping mechanism of a molded case circuit breaker, belonging to the field of low-voltage electrical appliances.
Background
With the rapid development of electric power utilities in recent years, the performance indexes of opening and closing and protection of the molded case circuit breaker are continuously enhanced, and the performance of the opening and closing and protection capability of the molded case circuit breaker is determined to a great extent by an operating mechanism. The tripping mechanism of the molded case circuit breaker is used as a core component in the circuit breaker, and is related to timely disconnection of a fault line, so that powerful guarantee is provided for property safety and personal safety. The plastic shell circuit breaker for the warship is one of important components for guaranteeing normal operation of the warship, wherein the important performance index of the plastic shell circuit breaker for the warship is impact resistance, the impact is a warship impact environment and a destructive environment under the action of explosive load, and the impact capacity of warship equipment is an important component of the vitality of the warship.
Aiming at the problem of impact resistance of the plastic shell circuit breaker for ships, the impact prevention hammer is arranged in front of the tripping plate, and when large impact occurs, the impact prevention hammer props against the traction rod due to the inertia effect, so that the traction rod cannot be tripped, and the normal operation of a line is guaranteed. The anti-impact hammer mechanism is added, so that the whole size of the molded case circuit breaker is increased, and the method is not in accordance with the main idea of miniaturization of the existing low-voltage circuit breaker.
Because the assembly precision between the draw bar and the lock catch plate is higher, when the mechanism is buckled again, the error of the production or assembly precision of the draw bar part is slightly larger, so that the contact surface between the draw bar and the lock catch is too small; or the hasp surfaces of the tripping mechanism jump buckles and the buckles are too small; or when the molded case circuit breaker is impacted, the relative position of the mechanism parts changes, and the circuit breaker release is easy to slide. Therefore, the production and assembly of the parts of the tripping mechanism need higher precision to ensure the consistency of the tripping mechanism.
The problems of impact resistance and slide fastener are solved at the present stage, and the production cost is increased due to the fact that parts are added, the production precision and the assembly precision are improved; the method is not in accordance with the development trend of low-voltage electrical appliances in the current stage, such as economy and reliability.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the utility model provides a moulded case circuit breaker tripping device that shock-resistant, workable, easy assembly have solved traditional circuit breaker release and have easily appeared the thread slipping phenomenon, need increase production and assembly precision, lead to increasing manufacturing cost's problem.
In order to solve the technical problem, the technical scheme of the invention is to provide a tripping mechanism of a molded case circuit breaker, which is characterized by comprising an X-shaped locking mechanism, wherein the locking mechanism is fixedly connected with a spring frame structure on the outer side of the locking mechanism, a tripping rod locked by the locking mechanism through the operation of an operating mechanism of the molded case circuit breaker is arranged at the top of the locking mechanism, and a tripping rod for opening and closing the locking mechanism through horizontal motion so as to trip the molded case circuit breaker is arranged on one side of the locking mechanism.
Preferably, the locking mechanism comprises a first locking rod and a second locking rod, the tops of the first locking rod and the second locking rod form a combined opening, the middle parts of the first locking rod and the second locking rod are connected through a rotating shaft, the spring frame structure comprises an external fixing frame and springs, the inner walls of two sides of the external fixing frame are fixedly connected with one ends of the two springs respectively, and the other ends of the two springs are fixed on the upper parts of the first locking rod and the second locking rod respectively.
Preferably, a protective curtain for preventing the jump buckle rod from falling off when the jump buckle rod is impacted is arranged at the joint of the locking mechanism and the jump buckle rod.
Preferably, the outer sides of the upper parts of the first locking rod and the second locking rod are respectively provided with a spring fixing frame, and the spring fixing frames are fixedly connected with the other ends of the springs.
Preferably, a limiting structure for limiting the distance between the opening and the closing of the locking mechanism is arranged between the first locking rod and the second locking rod.
Preferably, the limiting structure is a groove with an opening in the horizontal direction.
Preferably, the jump buckle rod is in an anchor shape, and the opening and closing of the locking mechanism is in a V shape which facilitates the jump buckle rod to be inserted into the locking mechanism.
Preferably, the lower end of the first locking bar is provided with a bend, the bend and the lower end of the second locking bar form a horizontal opening, and one side of the horizontal opening is provided with a trip bar.
The tripping mechanisms are connected in an occlusion mode, so that the phenomenon of slide-buckling after the mechanisms are buckled is greatly reduced, the problems of slide-buckling and impact of the molded case circuit breaker are better solved, and the production cost is reduced. The protective curtain is arranged at the joint of the locking mechanism and the trip bar, so that the breaker is more resistant to external impact and more reliable, and has great practicability for the plastic shell circuit breaker for warships. Compared with the traditional mechanism, the invention cancels the impact-proof hammer, integrates the draw bar and the trip plate into a locking mechanism, is easier to produce and assemble, and can be installed in a modularized way.
Drawings
Fig. 1 is an overall schematic view of a molded case circuit breaker trip mechanism;
FIG. 2 is a schematic view of a latch mechanism;
FIG. 3 is a schematic view of a trip bar;
FIG. 4 is a schematic view of a spring holder configuration;
fig. 5 is a schematic view of a trip bar.
Detailed Description
In order to make the invention more comprehensible, preferred embodiments are described in detail below with reference to the accompanying drawings.
The invention relates to a tripping mechanism of a molded case circuit breaker, which is carried out in a pure mechanical mode and comprises an X-shaped locking mechanism 1, an anchor-shaped tripping rod 2, a spring frame structure 3 and a tripping rod 4, wherein the locking mechanism 1 is in an X shape and can firmly bite the anchor-shaped tripping rod 2, and the locking mechanism 1 can replace a tripping plate and a traction rod of the traditional mechanism. The locking mechanism 1 is fixedly connected with a spring frame structure 3 on the outer side of the locking mechanism 1, a trip rod 2 is arranged at the top of the locking mechanism 1, and the trip rod 2 is locked by the locking mechanism 1 through the operation of the molded case circuit breaker operating mechanism. One side of the locking mechanism 1 is provided with a trip rod 4, and the trip rod 4 enables the locking mechanism 1 to be opened and closed through horizontal movement, so that the molded case circuit breaker is tripped.
As shown in fig. 2, the latch mechanism 1 includes a first latch rod 11 and a second latch rod 12, the tops of the first latch rod 11 and the second latch rod 12 form a split opening, the middle of the first latch rod 11 and the middle of the second latch rod 12 are connected through a rotating shaft, as shown in fig. 4, the spring frame structure 3 includes an external fixing frame 31 and springs 32, the inner walls of the two sides of the external fixing frame 31 are respectively fixedly connected with one ends of the two springs 32, and the other ends of the two springs 32 are respectively fixed on the upper portions of the first latch rod 11 and the second latch rod 12, that is, the latch mechanism 1 is fixed between the two springs 32. The outer sides of the upper parts of the first locking bar 11 and the second locking bar 12 are both provided with a spring fixing frame 14, and the spring fixing frame 14 is fixedly connected with the other end of the spring 32. The spring 32 is fixed to the spring fixing frame 14 of the latch mechanism 1, and the spring force of the spring 32 acts on the two latch levers (the first latch lever 11 and the second latch lever 12) to keep the two latch levers in an engaged state. The protective curtain 13 is arranged at the joint of the locking mechanism 1 and the trip bar 2, so that when the mechanism is impacted, the trip bar 2 is prevented from moving towards two sides, and the trip bar 2 falls off from the locking mechanism 1. The limiting structure 15 is arranged between the first lock catch rod 11 and the second lock catch rod 12, so that when the jump-free lock catch rod 2 is inserted, the distance exists between the closing and opening due to the limiting of the limiting structure 15 of the lock catch mechanism 1, and when the molded case circuit breaker is buckled again, the anchor-shaped jump-catch rod 2 is easily inserted into the lock catch mechanism 1. The limiting structure 15 is a groove with an opening in the horizontal direction, and in this embodiment, the first locking rod 11 and the second locking rod 12 are provided with cut-away portions (i.e., grooves) therebetween for limiting each other.
The lower end of the first locking bar 11 is provided with a bend, the bend and the lower end of the second locking bar 12 form a horizontal opening, and a trip bar 4 is arranged on one side of the horizontal opening, as shown in fig. 5.
As shown in fig. 3, the trip rod 2 is in an anchor shape, the opening and closing of the latch mechanism 1 is in a V shape, and when the mechanism is buckled, the trip rod 2 is easily inserted into the latch mechanism 1, so that the molded case circuit breaker operating mechanism is buckled.
The working principle of the invention is as follows:
according to the invention, the latching mechanism 1 is always in an occluded state by the thrust of the spring 32 in the spring frame structure 3 and is limited by the limit between the two latching rods, so that the occluding opening has a certain distance instead of being in a closed state when the latching mechanism 1 is in a released state; the jump buckle rod 2 in the shape of an anchor enables the jump buckle rod 2 to be inserted into the locking mechanism 1 through the buckling action of the plastic case circuit breaker operating mechanism.
When the circuit has faults such as short circuit or overload, the trip rod 4 moves forwards horizontally under the action of external thrust generated by the suction of an overcurrent release or the thermal deformation of a thermal bimetallic strip and the like, the trip rod 4 props the rear end of the locking mechanism 1, so that the front end of the locking mechanism 1 is in an open state, the trip rod 2 is always pulled by the operating mechanism, and the locking mechanism 1 is separated from the trip rod 2 to form the tripping of the operating mechanism of the molded case circuit breaker.
Claims (7)
1. A tripping mechanism of a molded case circuit breaker is characterized by comprising an X-shaped locking mechanism (1), wherein the locking mechanism (1) is fixedly connected with a spring frame structure (3) on the outer side of the locking mechanism, a tripping rod (2) locked by the locking mechanism (1) through the operation of an operating mechanism of the molded case circuit breaker is arranged at the top of the locking mechanism (1), and a tripping rod (4) which enables the locking mechanism (1) to be opened and closed through horizontal movement so as to trip the molded case circuit breaker is arranged on one side of the locking mechanism (1); the joint of the locking mechanism (1) and the trip bar (2) is provided with a protective curtain (13) which prevents the trip bar (2) from jumping to two sides and prevents the trip bar (2) from falling off from the locking mechanism (1) when the mechanism is impacted.
2. The trip mechanism of the molded case circuit breaker according to claim 1, wherein the latch mechanism (1) comprises a first latch rod (11) and a second latch rod (12), the top of the first latch rod (11) and the top of the second latch rod (12) form a split, the middle of the first latch rod (11) and the middle of the second latch rod (12) are connected through a rotating shaft, the spring frame structure (3) comprises an external fixing frame (31) and springs (32), the inner walls of both sides of the external fixing frame (31) are respectively fixedly connected with one ends of the two springs (32), and the other ends of the two springs (32) are respectively fixed on the upper portions of the first latch rod (11) and the second latch rod (12).
3. The trip mechanism of the molded case circuit breaker according to claim 2, wherein the spring fixing bracket (14) is provided at the outer side of the upper portion of each of the first latch lever (11) and the second latch lever (12), and the spring fixing bracket (14) is fixedly connected to the other end of the spring (32).
4. A molded case circuit breaker trip mechanism as claimed in claim 2, wherein a spacing structure (15) for limiting a distance between the opening and the closing of the trip mechanism (1) is provided between the first latch lever (11) and the second latch lever (12).
5. A molded case circuit breaker trip mechanism as defined in claim 4 wherein said limit structure (15) is a horizontally open recess.
6. A molded case circuit breaker trip mechanism as claimed in claim 2, wherein the trip bar (2) is in an anchor shape, and the opening and closing of the latch mechanism (1) is in a V shape for facilitating the insertion of the trip bar (2) into the latch mechanism (1).
7. A molded case circuit breaker trip mechanism as defined in claim 2, wherein the lower end of the first latch lever (11) is provided with a bend, the bend and the lower end of the second latch lever (12) form a horizontal opening, and the trip lever (4) is provided at one side of the horizontal opening.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710542823.0A CN107331584B (en) | 2017-07-05 | 2017-07-05 | Tripping mechanism of molded case circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710542823.0A CN107331584B (en) | 2017-07-05 | 2017-07-05 | Tripping mechanism of molded case circuit breaker |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107331584A CN107331584A (en) | 2017-11-07 |
| CN107331584B true CN107331584B (en) | 2019-12-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710542823.0A Active CN107331584B (en) | 2017-07-05 | 2017-07-05 | Tripping mechanism of molded case circuit breaker |
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| Country | Link |
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| CN (1) | CN107331584B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110200343A (en) * | 2019-07-16 | 2019-09-06 | 赵艳 | A kind of double circlip type old age buttons |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19919417A1 (en) * | 1999-04-28 | 2000-11-02 | Siemens Ag | Protection switching device |
| CN101599395B (en) * | 2008-06-05 | 2011-06-29 | 浙江正泰电器股份有限公司 | Auxiliary disengaging mechanism for breaker |
| CN102867705B (en) * | 2012-09-20 | 2015-06-03 | 上海诺雅克电气有限公司 | Minitype breaker with high stability |
| CN205789809U (en) * | 2016-03-01 | 2016-12-07 | 浙江正泰电器股份有限公司 | The earth leakage protective device of RCCB |
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2017
- 2017-07-05 CN CN201710542823.0A patent/CN107331584B/en active Active
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| Publication number | Publication date |
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| CN107331584A (en) | 2017-11-07 |
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