CN112967910B - Circuit breaker operating mechanism - Google Patents
Circuit breaker operating mechanism Download PDFInfo
- Publication number
- CN112967910B CN112967910B CN201911287433.9A CN201911287433A CN112967910B CN 112967910 B CN112967910 B CN 112967910B CN 201911287433 A CN201911287433 A CN 201911287433A CN 112967910 B CN112967910 B CN 112967910B
- Authority
- CN
- China
- Prior art keywords
- circuit breaker
- moving contact
- matching
- lock catch
- connecting rod
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 230000007246 mechanism Effects 0.000 title claims abstract description 96
- 238000005452 bending Methods 0.000 claims description 7
- 230000003068 static effect Effects 0.000 claims description 4
- 230000013011 mating Effects 0.000 description 11
- 230000005540 biological transmission Effects 0.000 description 4
- 230000009471 action Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- TVEXGJYMHHTVKP-UHFFFAOYSA-N 6-oxabicyclo[3.2.1]oct-3-en-7-one Chemical compound C1C2C(=O)OC1C=CC2 TVEXGJYMHHTVKP-UHFFFAOYSA-N 0.000 description 1
- 230000001154 acute effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- 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
-
- 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
- H01H71/04—Means for indicating condition of the switching device
-
- 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
- H01H71/12—Automatic release mechanisms with or without manual release
-
- 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
- H01H71/50—Manual reset mechanisms which may be also used for manual release
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H73/00—Protective overload circuit-breaking switches in which excess current opens the contacts by automatic release of mechanical energy stored by previous operation of a hand reset mechanism
- H01H73/02—Details
- H01H73/04—Contacts
-
- 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
- H01H71/04—Means for indicating condition of the switching device
- H01H2071/042—Means for indicating condition of the switching device with different indications for different conditions, e.g. contact position, overload, short circuit or earth leakage
Landscapes
- Breakers (AREA)
Abstract
本发明涉及低压电器领域，具体涉及一种断路器的操作机构，其包括设置在断路器的壳体内的手柄、首连杆、次连杆、跳扣、动触头件、锁扣和弧形的滑槽；所述手柄枢转设置在壳体上，首连杆的第一前端与手柄一端转动相连，首连杆的第一后端与跳扣中部转动相连且与滑槽滑动配合，跳扣的一端与次连杆一端转动相连，跳扣的跳扣配合端用于与锁扣一端的锁扣配合端锁扣配合，锁扣中部枢转设置在壳体上，次连杆另一端与动触头件一端转动相连，动触头件通过设于其中部的腰形孔转动设置在第一转轴上，动触头件另一端设有动触点；本发明的断路器的操作机构，结构简单、便于装配，布局紧凑、节约装配空间。
The present invention relates to the field of low-voltage electrical appliances, and in particular to an operating mechanism of a circuit breaker, which comprises a handle, a primary connecting rod, a secondary connecting rod, a trip button, a moving contact piece, a lock button and an arc-shaped slide groove arranged in a housing of the circuit breaker; the handle is pivotally arranged on the housing, a first front end of the primary connecting rod is rotationally connected to one end of the handle, a first rear end of the primary connecting rod is rotationally connected to a middle part of the trip button and slidably matched with the slide groove, one end of the trip button is rotationally connected to one end of the secondary connecting rod, a trip button matching end of the trip button is used for lock-matching with a lock button matching end at one end of the lock button, the middle part of the lock button is pivotally arranged on the housing, the other end of the secondary connecting rod is rotationally connected to one end of the moving contact piece, the moving contact piece is rotationally arranged on a first rotating shaft through a waist-shaped hole arranged in the middle part, and a moving contact point is arranged at the other end of the moving contact piece; the operating mechanism of the circuit breaker of the present invention has a simple structure, is easy to assemble, has a compact layout, and saves assembly space.
Description
Technical Field
The invention relates to the field of piezoelectric devices, in particular to an operating mechanism of a circuit breaker.
Background
The existing circuit breaker is complex in structure and process, and is difficult to realize automatic production, and particularly an operating mechanism of the existing circuit breaker is large in structure occupation space, and the requirements of the intelligent and miniaturized development trend of the circuit breaker cannot be met.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide an operating mechanism of a circuit breaker, which has the advantages of simple structure, convenience in assembly, compact layout and capability of saving assembly space.
In order to achieve the above purpose, the invention adopts the following technical scheme:
An operating mechanism of a circuit breaker comprises a handle 1, a first connecting rod 2, a second connecting rod 3, a trip button 4, a moving contact piece 5, a lock catch 7 and an arc-shaped chute 8 which are arranged in a shell H of the circuit breaker;
the handle 1 pivot sets up on casing H, the first front end 20 of first connecting rod 2 links to each other with handle 1 one end rotation, the first rear end 21 of first connecting rod 2 links to each other with jump knot 4 middle part rotation and with spout 8 sliding fit, the one end of jump knot 4 links to each other with the rotation of secondary connecting rod 3 one end, the jump knot cooperation end 410 of jump knot 4 is used for the hasp cooperation with the hasp cooperation end 700 of hasp 7 one end, hasp 7 middle part pivot sets up on casing H, the secondary connecting rod 3 other end links to each other with moving contact piece 5 one end rotation, moving contact piece 5 rotates through the kidney-shaped hole 53 that locates its middle part to set up on first pivot 5rs, the moving contact piece 5 other end is equipped with moving contact 52.
Preferably, the chute 8 is arc-shaped, and the center of the chute 8 is located on the rotation axis of the lock catch 7.
Preferably, when the circuit breaker is in the opening state, the trip matching end 410 and the latch matching end 700 are disposed opposite to each other, and a matching gap G is disposed between the trip matching end 410 and the latch matching end 700, and when the handle 1 drives the operating mechanism to close, the trip matching end 410 and the latch matching end 700 are in latch matching.
Preferably, the sliding groove 8 is disposed on the housing H and is in an integral structure with the housing H, and the first rear end 21 passes through the trip button 4 and is inserted into the sliding groove 8 to be slidably matched with the sliding groove.
Preferably, the handle 1 rotates and drives the first rear end 21 to move along the chute 8, the first rear end 21 drives the trip button 4 to rotate, so that the trip button mating end 410 is in latch fit with the latch mating end 700, meanwhile, the secondary connecting rod 3, the trip button 4, the moving contact piece 5 and the latch 7 form a four-bar mechanism which is static and synchronously rotates relative to each other until the moving contact 52 is initially contacted with the fixed contact 520 of the circuit breaker, the handle 1 continues to rotate to a closing position, the moving contact piece 5 is driven to swing by taking the fixed contact 520 as a fulcrum, the kidney-shaped hole 53 moves relative to the first rotating shaft 5rs, and the circuit breaker enters a closing state.
Preferably, the circuit breaker also comprises a first reset spring 90 for driving the movable contact piece 5 to reset, a second reset spring 92 for driving the lock catch 7 to reset, and the other end of the lock catch 7 is used for driving and matching with a protection mechanism of the circuit breaker;
When a fault occurs, the protection mechanism drives the lock catch 7 to rotate, so that the lock catch matching end 700 is released from locking matching with the jump catch matching end 410, the first reset spring 90 drives the movable contact piece 5 to rotate, the movable contact 52 and the fixed contact 520 are disconnected, meanwhile, the movable contact piece 5 drives the jump catch 4 to rotate by taking the first rear end 21 as an axis through the secondary connecting rod 3, the circuit breaker enters a tripping state, and the second reset spring 92 drives the lock catch 7 to rotate and reset after the circuit breaker trips.
Preferably, the moving contact piece 5 includes a moving contact connecting portion 50 and a moving contact contacting portion 51 respectively disposed at two ends of the moving contact connecting portion, one end of the moving contact connecting portion 50 is rotationally connected with the secondary connecting rod 3, a kidney-shaped hole 53 is disposed at the other end of the moving contact connecting portion, the moving contact connecting portion is bent and connected with one end of the moving contact contacting portion 51, a moving contact 52 is disposed at the other end of the moving contact contacting portion 51, one end of a first return spring 90 is connected with the housing H, and the other end of the first return spring is connected with the moving contact connecting portion 50.
Preferably, the protection mechanism comprises a short circuit protection mechanism 9 and an overload protection mechanism 6, the lock catch 7 is of a Y-shaped structure and comprises a matching arm 70, a short circuit driving arm 71 in driving fit with the short circuit protection mechanism 9 and an overload driving arm 72 in driving fit with the overload protection mechanism 6, one end of the matching arm 70 is provided with a lock catch matching end 700, the other end of the matching arm is respectively connected with the short circuit driving arm 71 and the overload driving arm 72 in a bending way, and the matching arm 70 is pivotally arranged on the shell H.
Preferably, the trip button 4 further comprises a brake opening indication surface and a brake closing indication surface which are arranged on one side of the trip button, an indication hole matched with the brake opening indication surface and the brake closing indication surface is formed in the shell H, when the circuit breaker is closed, the handle 1 rotates and drives the four-bar mechanism to rotate through the first connecting rod 2 so as to enable the brake closing indication surface to be opposite to the indication hole, and when the circuit breaker trips, the movable contact piece 5 drives the trip button 4 to rotate through the second connecting rod 3 so as to enable the brake opening indication surface to be opposite to the indication hole.
Preferably, the operating mechanism of the circuit breaker further comprises a moving contact limiting table 7a, the rotating angle of the moving contact piece 5 is limited when the moving contact 52 and the fixed contact 520 are disconnected, the operating mechanism of the circuit breaker further comprises a lock catch positioning structure, the second reset spring 92 drives the lock catch 7 to rotate and reset, the lock catch 7 is abutted against the lock catch positioning structure, and the moving contact limiting table 7a and the lock catch positioning structure are arranged on the shell H.
Preferably, the trip matching end 410 of the trip 4 is positioned above the latch matching end 700 of the latch 7 and is provided with a matching gap G when the switch is opened, and the handle 1 drives the trip 4 to rotate through the head connecting rod 2 when the switch is closed, so that the trip matching end 410 moves towards the latch matching end 700 to eliminate the matching gap G so as to enable the trip 4 to be in latch matching with the latch 7.
Compared with the operating mechanism of the existing circuit breaker, the operating mechanism of the circuit breaker has the advantages that the omitted rotating plate is fewer in parts, the connecting relation of all the component parts of the operating mechanism is simple, automatic assembly is convenient, the layout is compact, and the assembly space of a shell is saved. In addition, a fit clearance is arranged between the jump buckle fit end and the lock buckle fit end, so that the reliability of jump buckle and lock buckle reset is ensured.
Drawings
Fig. 1 is a schematic structural view of a second embodiment of an operating mechanism of a circuit breaker of the present invention;
Fig. 2 is a schematic structural view of a first embodiment of an operating mechanism of the circuit breaker of the present invention, the circuit breaker being in a disconnected state, a mating gap being provided between a trip mating end of the trip buckle and a latch mating end of the latch;
FIG. 3 is an enlarged schematic view of the mechanism of portion A of FIG. 2 in accordance with the present invention;
Fig. 4 is a schematic structural view of a first embodiment of the operating mechanism of the circuit breaker of the present invention, in which the trip engagement end of the trip buckle is snap-engaged with the snap-engagement end of the latch by pulling the handle;
FIG. 5 is an enlarged schematic view of the portion B of FIG. 4 in accordance with the present invention;
Fig. 6 is a schematic structural view of a first embodiment of the operating mechanism of the circuit breaker of the present invention, at least showing a state of the operating mechanism when the movable contact is initially contacted with the stationary contact.
Fig. 7 is a schematic structural view of a first embodiment of an operating mechanism of the circuit breaker of the present invention, the circuit breaker being in a closed state, the moving contact piece being offset with respect to the first rotation axis.
Fig. 8 is a schematic structural view of a first embodiment of an operating mechanism of the circuit breaker of the present invention, the circuit breaker being in a tripped condition, the trip engagement end of the trip buckle being disengaged from the latch engagement end of the latch.
Fig. 9 is a schematic structural view of a specific example of the first embodiment of the operating mechanism of the circuit breaker of the present invention, the circuit breaker being in a closed state, at least showing the structure of the trip button, the latch, the moving contact piece;
FIG. 10 is a schematic view of the structure of the head link of the present invention;
FIG. 11 is a schematic view of the construction of the secondary link of the present invention;
FIG. 12 is a schematic view of the structure of the moving contact member of the present invention;
Fig. 13 is a schematic structural view of the base of the housing H of the present invention.
Detailed Description
The following describes further embodiments of the operating mechanism of the circuit breaker according to the invention in connection with the examples given in fig. 1-13. The operating mechanism of the circuit breaker of the present invention is not limited to the description of the following embodiments.
The circuit breaker comprises an operating mechanism arranged in a shell H of the circuit breaker, wherein the operating mechanism comprises a handle 1, a first connecting rod 2, a second connecting rod 3, a trip button 4, a moving contact piece 5, a lock catch 7 and an arc-shaped chute 8;
The middle part of the handle 1 is pivoted on the shell H, the first front end 20 of one end of the first connecting rod 2 is rotationally connected with one end of the handle 1, the first rear end 21 of the other end is rotationally connected with the middle part of the jump button 4 and is in sliding fit with the sliding groove 8, one end of the jump button 4 is rotationally connected with one end of the secondary connecting rod 3, the jump button matching end 410 of the other end is used for being in locking fit with the lock button matching end 700 of one end of the lock button 7, the middle part of the lock button 7 is pivoted on the shell H, the other end is used for being in driving fit with a protection mechanism of the circuit breaker, the other end of the secondary connecting rod 3 is rotationally connected with one end of the movable contact piece 5, the other end of the movable contact piece 5 is provided with a movable contact 52 which is matched with a fixed contact 520 fixed on the shell H, and the movable contact piece 5 is rotationally arranged on the first rotating shaft 5rs through a waist-shaped hole 53 arranged in the middle part of the movable contact piece 5;
During closing, the handle 1 rotates and drives the first rear end 21 to slide along the chute 8, the first rear end 21 drives the jump button 4 to rotate, the jump button matching end 41 is in lock catch matching with the lock catch matching end 700, meanwhile, the secondary connecting rod 3, the jump button 4, the moving contact piece 5 and the lock catch 7 form a four-bar mechanism which is static and synchronously rotates relative to each other until the moving contact 52 is initially contacted with the fixed contact 520, the handle 1 continues to rotate to a closing position, the moving contact piece 5 is driven to swing by taking the fixed contact 520 as a fulcrum, the kidney-shaped hole 53 moves relative to the first rotating shaft 5rs, and the circuit breaker enters a closing state.
Compared with the operating mechanism of the existing circuit breaker, the operating mechanism of the circuit breaker omits a rotating plate, has fewer parts, has simple connection relation of all the component parts of the operating mechanism, is convenient for automatic assembly, has compact layout and saves the assembly space of a shell.
Preferably, as shown in fig. 2 and 3, when the circuit breaker is in the open state, the trip engagement end 410 is opposite to the latch engagement end 700, and an engagement gap G is provided between the trip engagement end 410 and the latch engagement end 700. After the circuit breaker trips, the trip button 4 can enter a state shown in fig. 8, when the trip button 4 is driven to reset by the toggle handle 1, if there is no fit clearance, the trip button fit end 410 is blocked by the fit arm 70 of the lock catch 7 and cannot reset due to the effects of part tolerance, deformation, external force and the like, the circuit breaker cannot be closed again, the reliability of the circuit breaker is reduced, and therefore the fit clearance G ensures the reset reliability of the trip button 4 and the lock catch 7. It should be noted that the fit clearance G should not be too large, which is not beneficial to saving the internal assembly space of the circuit breaker, and should not be too small, otherwise, the trip buckle 4 may not be reset. Preferably, the width of the fit gap is 1mm-5mm.
Preferably, as shown in fig. 1, 2, 4 and 6-8, the middle part of the lock catch 7 is pivotally arranged on the housing H through a first rotating shaft 5 rs. The lock catch 7 and the movable contact piece 5 are coaxially assembled and coaxially rotate, so that the size of the operating mechanism is further reduced, and the assembly space in the shell is saved. Of course, the middle part of the lock catch 7 can also be pivotally arranged on the housing H through a second rotating shaft 7rs, and the second rotating shaft 7rs is fixed on the housing H and located at one side of the first rotating shaft 5 rs.
Preferably, the chute 8 is arc-shaped, and the center of the chute 8 is positioned on the rotation axis of the lock catch 7, so that not only is transmission fit facilitated, but also the volume of the operating mechanism is further reduced, and the assembly space in the shell is saved.
Preferably, the device further comprises a first reset spring 90 for driving the movable contact piece 5 to reset, a second reset spring 92 for driving the lock catch 7 to reset, wherein the second reset spring 92 is respectively connected with the shell H and the lock catch 7, and the protection mechanism comprises a short-circuit protection mechanism 9 and an overload protection mechanism 6, and can also comprise protection mechanisms with other functions. As shown in fig. 8 and 9, when a short circuit fault or an overload fault occurs, the short circuit protection mechanism 9 or the overload protection mechanism 6 drives the lock catch 7 to rotate, so that the lock catch matching end 700 is released from locking matching with the trip matching end 410, the first return spring 90 drives the moving contact element 5 to rotate, so that the moving contact 52 and the fixed contact 520 are disconnected, meanwhile, the moving contact element 5 drives the trip 4 to rotate by taking the first rear end 21 as an axis through the secondary connecting rod 3, the circuit breaker enters a tripping state, and the second return spring 92 drives the lock catch 7 to rotate and return after the circuit breaker trips.
Preferably, as shown in fig. 13, the chute 8 is disposed on the housing H and is integrally formed therewith, and the first rear end 21 is slidably disposed in the chute 8 through the trip button 4. It should be noted that another matching manner exists among the first rear end 21, the trip button 4 and the chute 8, that is, the first rear end 21 has a rod-shaped structure, one end of which is rotationally connected with the trip button 4, and the other end of which is slidably disposed in the chute 8.
As shown in fig. 2-12, is a first embodiment of the operating mechanism of the circuit breaker of the present invention.
As shown in fig. 2, 4, 6 and 7-9, the circuit breaker of the invention comprises an operating mechanism arranged in a shell H of the circuit breaker, wherein the operating mechanism comprises a handle 1, a first connecting rod 2, a second connecting rod 3, a trip button 4, a moving contact piece 5, a lock catch 7 and an arc-shaped chute 8, and a first reset spring 90, a second reset spring 92 and a first rotating shaft 5rs are also arranged in the shell H of the circuit breaker. The middle part of the handle 1 is pivoted on the shell H, a first front end 20 at one end of the first connecting rod 2 is rotationally connected with one end of the handle 1, a first rear end 21 at the other end is rotationally connected with the middle part of the jump button 4 and is slidably arranged in the sliding chute 8, one end of the jump button 4 is rotationally connected with one end of the secondary connecting rod 3, a jump button matching end 410 at the other end is matched with a lock button matching end 700 at one end of the lock button 7, the middle part of the lock button 7 is pivotally arranged on the shell H, the other end is respectively in driving fit with a short-circuit protection mechanism 9 and an overload protection mechanism 6 of the circuit breaker, the other end of the secondary connecting rod 3 is rotationally connected with one end of the movable contact piece 5, the other end of the movable contact piece 5 is provided with a movable contact 52 which is matched with a fixed contact 520 fixed on the shell H, the movable contact piece 5 is rotationally arranged on a first rotating shaft 5rs through a waist-shaped hole 53 arranged in the middle part of the movable contact piece, the first rotating shaft 5rs is fixed on the shell H, two ends of the first reset spring 90 are respectively connected with the shell H and the movable contact piece 5, two ends of the second reset spring 92 are respectively connected with the shell H and 7, the center of circle of the lock button 8 is located on the rotating shaft 7 of the lock button 7. Further, as shown in fig. 2 and 3, when the circuit breaker is in the open state, the trip engagement end 410 and the latch engagement end 700 are disposed opposite to each other, and a fit gap G is provided between the trip engagement end 410 and the latch engagement end 700. Further, as shown in fig. 3, the width of the fit gap is L.
Preferably, as shown in fig. 2, the handle 1 includes an operation arm 10 and a transmission arm 11 which are connected in a bending manner, the connection part of the operation arm 10 and the transmission arm 11 is pivotally arranged on the housing H, the free end of the operation arm 10 protrudes out of the housing H for the user to operate, and the free end of the transmission arm 11 is rotationally connected with the first front end 20 of the head link 2. Further, as shown in fig. 2, the included angle between the operating arm 10 and the driving arm 11 is an acute angle.
Preferably, as shown in fig. 13, the chute 8 is disposed on the housing H and is integrally formed therewith, the first rear end 21 passes through the trip buckle 4 and is inserted into the chute 8 to be slidably matched therewith, the chute 8 is in a circular arc shape, and the center of the chute 8 is located on the rotation axis of the lock catch 7.
Preferably, the circuit breaker further comprises a moving contact limiting table 7a for limiting the rotation angle of the contact piece 5 when the moving contact 53 and the fixed contact 520 are disconnected, and a lock catch positioning structure, wherein the second return spring 92 drives the lock catch 7 to rotate and reset, so that the lock catch 7 is abutted against the lock catch positioning structure. Further, the moving contact limiting table 7a and the lock catch positioning structure are both arranged on the shell H.
Specifically, as shown in fig. 2, the middle part of the handle 1 is pivotally disposed on the housing H, the free end of the operating arm 10 protrudes outside the housing H for a user to operate, the free end of the driving arm 11 is rotationally connected with the left end of the first connecting rod 2, the first rear end 21 of the right end of the first connecting rod 2 is rotationally connected with the middle part of the jump button 4, the first rear end 21 passes through the jump button 4 and is inserted in the chute 8 to be slidingly matched with the chute 8, the center of the chute 8 is located on the axis of the first rotating shaft 5rs, the right end of the jump button 4 is rotationally connected with the left end of the secondary connecting rod 3, the jump button matching end 410 of the right end is rotationally matched with the lock button matching end 700 at the upper end of the lock button 7, the middle part of the lock button 7 is pivotally disposed on the housing H through the first rotating shaft 5rs, the lower end is respectively in driving fit with the short circuit protection mechanism 9 and the overload protection mechanism 6, the left end of the secondary connecting rod 3 is rotationally connected with the upper end of the moving contact piece 5, the lower end is provided with a moving contact 52 matched with a fixed contact 520 on the housing H, the moving contact piece 5 is rotationally arranged on the first rotating shaft 5rs through a waist-shaped hole 53 (not shown in the figure) arranged on the middle part of the first rotating shaft 5 rs; the first return spring 90 is disposed on the right side of the moving contact member 5, one end of the first return spring is connected to a portion of the moving contact member 5 above the kidney-shaped hole 53, and the other end of the first return spring is connected to the housing H (not shown), and the second return spring 92 (not shown) provides a force for driving the latch 7 to rotate clockwise, so that the latch 7 is driven to rotate and return after the circuit breaker trips, and the latch 7 abuts against the latch positioning structure. Further, as shown in fig. 2, the moving contact limiting table 7a is disposed on the right side of the moving contact member 5, and when the circuit breaker is in the open state, the moving contact portion 51 of the moving contact member 5 abuts against the moving contact limiting table 7 a. Further, as shown in fig. 2, the short-circuit protection mechanism 9 is disposed below the handle 1 and located at the left side of the lock catch 7, preferably an electromagnetic release, and the overload protection mechanism 6 is disposed at the right side of the lock catch 7, preferably a bimetallic strip.
The operation of the operating mechanism of the present invention will be described below with reference to fig. 2 to 8.
As shown in fig. 2, the circuit breaker is in a breaking state, when the handle 1 is in a breaking position O (specifically, the operating arm 10 of the handle 1 is stopped at the breaking position O), the trip engagement end 410 of the trip buckle 4 is located above the latch engagement end 700 of the latch 7, and the trip engagement end 410 and the latch engagement end are opposite to each other with an engagement gap G therebetween; when closing, the handle 1 is shifted to rotate clockwise, firstly the handle 1 drives the jump button 4 to rotate anticlockwise through the first connecting rod 2 (at the moment, the jump button 4 rotates around the first rear end 21 as an axis, the rotation amplitude is smaller), the jump button matching end 410 moves towards the lock button matching end 700 (so as to eliminate the matching gap G), the two are matched in a locking way (as shown in figures 4-5), at the moment, the jump button 4, the secondary connecting rod 3, the moving contact piece 5 and the lock button 7 form a four-bar mechanism which is static and synchronously rotates relative to each other, the handle 1 is continuously shifted to rotate clockwise, the four-bar mechanism is driven to rotate clockwise around the rotating shaft of the lock button 7, until the movable contact 52 at the lower end of the movable contact member 5 is initially contacted with the stationary contact 520 (as shown in fig. 6, when the movable contact 52 and the stationary contact 520 are just contacted with each other), and the handle 1 is further pushed to rotate clockwise, the movable contact member 5 starts to swing clockwise with the stationary contact 520 as a fulcrum, and at the same time, the kidney-shaped hole 53 moves relative to the first rotating shaft 5rs (preferably, the kidney-shaped hole 53 translates relative to the first rotating shaft 5 rs), so that the first return spring 90 is further compressed, an over-travel force provided by the first return spring 90 (i.e., a force for maintaining the movable contact 52 and the stationary contact 520 in reliable contact) is obtained, until the handle 1 reaches the closed position C (specifically, as shown in fig. 7, the operating arm 10 of the handle 1 rests at the closing position C), at which time the four-bar mechanism is in a force balanced state, keeping the moving contact 52 and the stationary contact 520 closed, and the circuit breaker enters a closing state. As shown in fig. 8, when a short circuit fault or an overload fault occurs, the short circuit protection mechanism 9 or the overload protection mechanism 6 can drive the lock catch 7 to rotate anticlockwise, so that the lock catch matching end 700 is released from locking matching with the trip matching end 410, the first reset spring 90 drives the moving contact member 5 to rotate anticlockwise, the trip 4 is driven by the moving contact member 5 through the secondary connecting rod 3 to rotate anticlockwise around the first rear end 21 of the primary connecting rod 2, the moving contact 52 and the fixed contact 520 are disconnected, then the second reset spring 92 drives the lock catch 7 to rotate clockwise to reset, at the moment, the handle 1 is pushed to the opening direction, the handle 1 drives the trip 4 to rotate clockwise around the left end of the secondary connecting rod 3 through the primary connecting rod 2, and the circuit breaker enters the opening state. Preferably, as shown in fig. 8 and 2, the breaker operating mechanism of the present invention further includes a handle return spring, when the trip button 4 is disengaged from the latch 7, the second return spring 92 drives the latch 7 to rotate clockwise for return, and meanwhile, the first link 2 no longer applies a force to the handle 1, so that the handle 1 rotates to the opening position O (the action process is slower than that of the moving contact 5) under the action of the handle return spring, and simultaneously, the trip button 4 is pulled to rotate clockwise for return, and when the trip button mating end 410 of the trip button 4 rotates past the latch mating end 700 of the latch 7, a mating gap is reappeared between the two.
Preferably, the trip button 4 further comprises a brake opening indication surface and a brake closing indication surface which are arranged on one side of the breaker, an indication hole matched with the brake opening indication surface and the brake closing indication surface is formed in the shell H, when the breaker is closed, the handle 1 rotates and drives the four-bar mechanism to rotate through the first connecting rod 2 so that the brake closing indication surface is opposite to the indication hole, and when the breaker trips, the movable contact piece 5 drives the trip button 4 to rotate through the second connecting rod 3 so that the brake opening indication surface is opposite to the indication hole. Specifically, as shown in fig. 2, when the circuit breaker is switched on, the four-bar mechanism integrally rotates clockwise to enable the switch-on indication surface to be opposite to the indication hole, and when the circuit breaker trips, the trip button 4 rotates anticlockwise around the first rear end 21, and the switch-off indication surface is opposite to the indication hole.
Preferably, as shown in fig. 9, an embodiment of the latch 7 is shown.
The lock catch 7 is of a Y-shaped structure and comprises a matching arm 70, a short-circuit driving arm 71 in driving fit with the short-circuit protection mechanism 9 and an overload driving arm 72 in driving fit with the overload protection mechanism 6, one end of the matching arm 70 is provided with a lock catch matching end 700, the other end of the matching arm is respectively connected with the short-circuit driving arm 71 and the overload driving arm 72 in a bending mode, and the matching arm 70 is pivoted on the shell H through a first rotating shaft 5 rs. Further, as shown in fig. 9, a latch shaft hole is formed in the middle of the mating arm 70, and the latch 7 is rotatably disposed on the first rotating shaft 5rs through the latch shaft hole. Further, as shown in fig. 9, the latch 7 further includes a latch positioning portion, where the latch positioning portion is disposed at a free end of the mating arm 70 and located at a side of the latch mating end 700, and the second return spring 92 drives the latch 7 to rotate and return, so that the latch positioning portion abuts against a side wall (as a latch positioning structure) of the chute 8.
As shown in fig. 9 and 12, is an embodiment of the moving contact piece 5.
The moving contact piece 5 is in a V-shaped structure, and comprises a moving contact connecting part 50 and a moving contact part 51 which are connected in a bending way, a kidney-shaped hole 53 is formed in one end of the moving contact connecting part 50 connected with the moving contact part 51, a moving contact connecting hole 55 is formed in the other end of the moving contact connecting part 50 and is connected with the secondary connecting rod 3 in a rotating way, and a moving contact 52 is arranged at the free end of the moving contact part 51. Further, as shown in fig. 12, a spring limiting protrusion 54 is pressed out from one side of the moving contact connection portion 50. Further, the moving contact member 5 further includes a protrusion structure 56, where the protrusion structure 56 is disposed at a side of a connection portion between the moving contact connection portion 50 and the moving contact portion 51, and extends toward the direction in which the lock catch 7 is located.
Specifically, as shown in fig. 12, the upper end of the moving contact connecting portion 50 is provided with a moving contact connecting hole 55, the lower end is bent and connected with the upper end of the moving contact contacting portion 51, and is provided with a kidney-shaped hole 53, a spring limiting protrusion 54 is disposed on the right edge of the moving contact connecting portion 50, the left side of the lower end of the moving contact contacting portion 51 is provided with a moving contact 52, and a protrusion structure 56 is disposed on the left side of the moving contact member 5 and is located below the kidney-shaped hole 53.
Preferably, as shown in fig. 9, the housing H is provided with a spring limiting groove 90a, one end of the first return spring 90 is sleeved on the spring limiting protrusion 54, and the other end is disposed in the spring limiting groove 90.
Preferably, as shown in fig. 10 and 11, the first connecting rod 2 and the second connecting rod 3 are both in U-shaped structures, the first connecting rod 2 comprises a first connecting portion 23, a first front end 20 and a first rear end 21, the first front end 20 and the first rear end are respectively connected with two ends of the first connecting portion 23 in a bending manner, the first rear end 21 is longer than the first front end 20, the second connecting rod 3 comprises a second connecting portion 33, a second front end 30 and a second rear end 31, the second front end 30 and the second rear end 31 are respectively connected with two ends of the second connecting portion 33 in a bending manner, and the first rear end 31 is longer than the first front end 30.
As shown in fig. 9 and 13, a specific example of the first embodiment of the operating mechanism of the circuit breaker of the present invention is shown.
In the direction shown in fig. 9, the housing H includes a base and a cover, the handle 1 is pivotally disposed at the upper end of the housing H, an operation arm 10 at one end of the handle 1 protrudes outside the housing H for operation by a user, the trip button 4, the latch 7, the moving contact member 5, and the first return spring 9 are all located on the right side of the handle 1, the trip button 4 is located above the latch 7 and the moving contact member 5 and between the upper end of the latch 7 and the upper end of the moving contact member 5, a chute 8 (as shown in fig. 13) is disposed on the base and is located at one side of the trip button 4, the moving contact member 5 and the latch 7 are sequentially stacked between the base and the cover, and are pivotally disposed on the base through a first rotation shaft 5rs, the first return spring 9 is disposed on the right side of the moving contact member 5, the left end is connected with the moving contact member 5, the right end is connected with the housing H, and the first front end 20 and the first rear end 21 of the first connecting rod 2 are respectively inserted into the middle of the handle 1 and the trip button 4 from the thickness direction of the housing H, and the two ends of the sub connecting rod 3 are respectively inserted into the right end of the trip button 4 and the upper end of the moving contact member 5 from the thickness direction of the housing H. Further, the movable contact piece 5 is made of plate-shaped metal, and the thickness of the lock catch 7 and the movable contact piece 5 stacked together is less than 5.5mm. Further, as shown in fig. 9, the first front end 20 and the first rear end 21 of the first connecting rod 2 are respectively inserted into the middle parts of the handle 1 and the trip button 4 from the direction of the cover, and the two ends of the secondary connecting rod 3 are respectively inserted into the right end of the trip button 4 and the upper end of the moving contact piece 5 from the direction of the cover.
The operating mechanism of the circuit breaker has the advantages of simple matching structure among all the components, reasonable and concise structural hierarchy and convenience for mechanized mass production.
As shown in fig. 1, a second embodiment of the operating mechanism of the circuit breaker of the present invention is shown.
The operating mechanism of the circuit breaker in this embodiment is different from the operating mechanism of the circuit breaker in the first embodiment in that the lock catch 7 is pivotally disposed on the housing through a second rotating shaft 7rs, and the center of a circle of the chute 8 is located on the axis of the second rotating shaft 7 rs.
The foregoing is a further detailed description of the invention in connection with the preferred embodiments, and it is not intended that the invention be limited to the specific embodiments described. It will be apparent to those skilled in the art that several simple deductions or substitutions may be made without departing from the spirit of the invention, and these should be considered to be within the scope of the invention.
Claims (11)
1. The operating mechanism of the circuit breaker is characterized by comprising a handle (1), a first connecting rod (2), a second connecting rod (3), a jump buckle (4), a moving contact piece (5), a lock catch (7) and an arc-shaped chute (8) which are arranged in a shell (H) of the circuit breaker;
The handle (1) pivot sets up on casing (H), first front end (20) of first connecting rod (2) rotate with handle (1) one end and link to each other, first rear end (21) of first connecting rod (2) rotate with jump knot (4) middle part and link to each other and with spout (8) sliding fit, the one end of jump knot (4) rotates with secondary connecting rod (3) one end and links to each other, jump knot cooperation end (410) of jump knot (4) are used for the hasp cooperation with hasp cooperation end (700) of hasp (7) one end, hasp (7) middle part pivot sets up on casing (H), secondary connecting rod (3) other end rotates with moving contact spare (5) one end and links to each other, moving contact spare (5) rotate through kidney-shaped hole (53) that locates its middle part and set up on first pivot (5 rs), moving contact spare (5) other end is equipped with moving contact (52).
2. The operating mechanism of the circuit breaker according to claim 1, wherein the chute (8) is arc-shaped, and the center of the chute (8) is positioned on the rotation axis of the lock catch (7).
3. The operating mechanism of the circuit breaker according to claim 1, wherein the trip matching end (410) is opposite to the latch matching end (700) when the circuit breaker is in a breaking state, a matching gap (G) is arranged between the trip matching end (410) and the latch matching end (700), and the trip matching end (410) is in latch matching with the latch matching end (700) when the handle (1) drives the operating mechanism to close.
4. The operating mechanism of a circuit breaker according to claim 1, wherein the chute (8) is arranged on the housing (H) and is of an integral structure with the housing, and the first rear end (21) passes through the trip button (4) and is inserted into the chute (8) to be in sliding fit with the chute.
5. The operating mechanism of a circuit breaker according to claim 1, wherein:
The handle (1) rotates and drives the first rear end (21) to move along the chute (8), the first rear end (21) drives the jump button (4) to rotate, the jump button matching end (410) is in lock catch matching with the lock catch matching end (700), meanwhile, the secondary connecting rod (3), the jump button (4), the moving contact piece (5) and the lock catch (7) form a four-bar mechanism which is static and synchronously rotates relative to each other until the moving contact (52) is in initial contact with the fixed contact (520) of the circuit breaker, the handle (1) continues to rotate to a closing position, the moving contact piece (5) is driven to swing by taking the fixed contact (520) as a fulcrum, the kidney-shaped hole (53) moves relative to the first rotating shaft (5 rs), and the circuit breaker enters a closing state.
6. The operating mechanism of a circuit breaker of claim 5, wherein:
The circuit breaker also comprises a first reset spring (90) for driving the movable contact piece (5) to reset, a second reset spring (92) for driving the lock catch (7) to reset, and the other end of the lock catch (7) is used for driving and matching with a protection mechanism of the circuit breaker;
When faults occur, the protection mechanism drives the lock catch (7) to rotate, the lock catch matching end (700) is enabled to be in lock catch matching with the trip matching end (410), the first reset spring (90) drives the movable contact piece (5) to rotate, the movable contact (52) and the fixed contact (520) are enabled to be disconnected, meanwhile, the movable contact piece (5) drives the trip buckle (4) to rotate by taking the first rear end (21) as an axis through the secondary connecting rod (3), the circuit breaker enters a tripping state, and the second reset spring (92) drives the lock catch (7) to rotate and reset after the circuit breaker trips.
7. The operating mechanism of a circuit breaker according to claim 6, wherein the moving contact member (5) comprises a moving contact connecting portion (50) and a moving contact contacting portion (51) which are respectively arranged at two ends of the moving contact member, one end of the moving contact connecting portion (50) is rotatably connected with the secondary connecting rod (3), the other end of the moving contact connecting portion is provided with a kidney-shaped hole (53) and is bent and connected with one end of the moving contact contacting portion (51), the other end of the moving contact contacting portion (51) is provided with a moving contact (52), one end of the first return spring (90) is connected with the housing (H), and the other end of the first return spring is connected with the moving contact connecting portion (50).
8. The operating mechanism of the circuit breaker according to claim 6, wherein the protection mechanism comprises a short circuit protection mechanism (9) and an overload protection mechanism (6), the lock catch (7) is of a Y-shaped structure and comprises a matching arm (70), a short circuit driving arm (71) in driving fit with the short circuit protection mechanism (9) and an overload driving arm (72) in driving fit with the overload protection mechanism (6), one end of the matching arm (70) is provided with a lock catch matching end (700), the other end of the matching arm is respectively connected with the short circuit driving arm (71) and the overload driving arm (72) in a bending mode, and the matching arm (70) is pivoted on the shell (H).
9. The operating mechanism of the circuit breaker according to claim 5, wherein the trip button (4) further comprises a breaking indication surface and a closing indication surface which are arranged on one side of the trip button, an indication hole matched with the breaking indication surface and the closing indication surface is formed in the shell (H), when the circuit breaker is closed, the handle (1) rotates and drives the four-bar mechanism to rotate through the first connecting rod (2) so that the closing indication surface is opposite to the indication hole, and when the circuit breaker trips, the movable contact piece (5) drives the trip button (4) to rotate through the second connecting rod (3) so that the breaking indication surface is opposite to the indication hole.
10. The operating mechanism of the circuit breaker according to claim 5, further comprising a moving contact limiting table (7 a), wherein the moving contact limiting table (7 a) and the fixed contact (520) limit the rotation angle of the moving contact piece (5) when the moving contact (52) and the fixed contact are disconnected, and the operating mechanism of the circuit breaker further comprises a lock catch positioning structure, wherein the second reset spring (92) drives the lock catch (7) to rotate and reset so that the lock catch (7) abuts against the lock catch positioning structure, and the moving contact limiting table (7 a) and the lock catch positioning structure are both arranged on the shell (H).
11. The operating mechanism of the circuit breaker according to claim 3, wherein the trip matching end (410) of the trip (4) is located above the latch matching end (700) of the latch (7) and is provided with a matching gap (G), and the handle (1) drives the trip (4) to rotate through the head connecting rod (2) when the circuit breaker is closed, so that the trip matching end (410) moves towards the latch matching end (700) to eliminate the matching gap (G) to enable the trip (4) to be in latch fit with the latch (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911287433.9A CN112967910B (en) | 2019-12-14 | 2019-12-14 | Circuit breaker operating mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911287433.9A CN112967910B (en) | 2019-12-14 | 2019-12-14 | Circuit breaker operating mechanism |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112967910A CN112967910A (en) | 2021-06-15 |
| CN112967910B true CN112967910B (en) | 2025-04-15 |
Family
ID=76270774
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911287433.9A Active CN112967910B (en) | 2019-12-14 | 2019-12-14 | Circuit breaker operating mechanism |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112967910B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117954285B (en) * | 2022-10-20 | 2025-03-04 | 上海正泰智能科技有限公司 | Operating mechanism of circuit breaker and circuit breaker |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN211350534U (en) * | 2019-12-14 | 2020-08-25 | 浙江正泰电器股份有限公司 | Operating mechanism of circuit breaker |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104733264A (en) * | 2015-03-16 | 2015-06-24 | 温州高能电气有限公司 | Miniature circuit breaker |
| CN207338281U (en) * | 2017-11-03 | 2018-05-08 | 环宇集团浙江高科股份有限公司 | A kind of miniature circuit breaker |
| CN109243932B (en) * | 2018-10-11 | 2024-04-09 | 上海永继电气股份有限公司 | Breaker operating system |
| CN109686625B (en) * | 2018-12-28 | 2024-05-07 | 浙江正泰电器股份有限公司 | Small-sized circuit breaker |
-
2019
- 2019-12-14 CN CN201911287433.9A patent/CN112967910B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN211350534U (en) * | 2019-12-14 | 2020-08-25 | 浙江正泰电器股份有限公司 | Operating mechanism of circuit breaker |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112967910A (en) | 2021-06-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110400727A (en) | breaker | |
| CN211350533U (en) | Operating mechanism of circuit breaker | |
| WO2017121164A1 (en) | Operation mechanism for miniature circuit breaker | |
| CN109659206B (en) | A small circuit breaker operating mechanism and a small circuit breaker | |
| CN111477511B (en) | Plug-in circuit breaker | |
| WO2016074321A1 (en) | Breaker operation mechanism | |
| CN211654742U (en) | Operating mechanism of circuit breaker | |
| CN111816529A (en) | Mechanism components of pluggable circuit breakers | |
| CN112992620B (en) | Circuit breaker operating mechanism | |
| CN111681928A (en) | breaker | |
| CN112967910B (en) | Circuit breaker operating mechanism | |
| CN111725036A (en) | Push-in and easy-closing circuit breakers | |
| CN209357690U (en) | A miniature circuit breaker operating mechanism and miniature circuit breaker | |
| CN211350534U (en) | Operating mechanism of circuit breaker | |
| CN110600336B (en) | Leakage circuit breaker with leakage indicating mechanism | |
| CN118737769A (en) | An operating device for leakage protection circuit breaker | |
| CN111128616B (en) | An operating mechanism for a small circuit breaker | |
| JP5333253B2 (en) | Circuit breaker | |
| CN210897144U (en) | Circuit breaker | |
| CN113972109B (en) | Clutch transmission assembly and circuit breaker | |
| CN217333981U (en) | Trip mechanism | |
| CN111477517A (en) | Plug-in circuit breaker | |
| CN113707472B (en) | Operating mechanism to prevent accidental closing of circuit breakers | |
| WO2023098841A1 (en) | Circuit breaker | |
| CN212010870U (en) | Breaker and 5G power distribution cabinet with same |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |