CN220172041U - Thermomagnetic tripping device of circuit breaker - Google Patents
Thermomagnetic tripping device of circuit breaker Download PDFInfo
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- CN220172041U CN220172041U CN202320214118.9U CN202320214118U CN220172041U CN 220172041 U CN220172041 U CN 220172041U CN 202320214118 U CN202320214118 U CN 202320214118U CN 220172041 U CN220172041 U CN 220172041U
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- 230000001105 regulatory effect Effects 0.000 claims abstract description 80
- 238000009434 installation Methods 0.000 claims description 12
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- 230000002093 peripheral effect Effects 0.000 claims description 3
- 230000003750 conditioning effect Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 230000003247 decreasing effect Effects 0.000 description 1
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- 238000005096 rolling process Methods 0.000 description 1
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Abstract
The thermal magnetic tripping device of the circuit breaker comprises a shell, a thermal magnetic tripping device and a mechanism traction rod in the shell, wherein the thermal magnetic tripping device comprises a thermal tripping device, a tripping traction rod, a magnetic tripping device, a magnetic adjusting rod and a magnetic adjusting spring; the thermal tripping device is provided with a second thermal regulating piece for regulating the thermal tripping gap, and one end of the second thermal regulating piece is exposed outside the shell; the magnetic tripping device is provided with a second magnetic adjusting piece for adjusting the stretching amount of the magnetic force adjusting spring, and one end of the second magnetic adjusting piece is exposed outside the shell. The thermomagnetic tripping device of the circuit breaker has both internal thermomagnetic regulation and external thermomagnetic regulation.
Description
Technical Field
The utility model relates to the field of piezoelectric devices, in particular to a thermal magnetic tripping device of a circuit breaker.
Background
The circuit breaker is generally provided with a contact system, an arc extinguishing system, an operating mechanism, a thermomagnetic release and the like, and when overload or short-circuit fault current occurs in a circuit, the thermomagnetic release can enable the circuit breaker to timely cut off the fault current so as to protect the system and other components in the system. In the existing circuit breaker, normally, manufacturers carry out gear adjustment on short-circuit instantaneous protection and overload protection of the thermomagnetic release when leaving the factory according to different use scenes, namely, fixed use scenes of the circuit breaker are specified, users cannot carry out gear adjustment on the circuit breaker, and when the application scenes of the circuit breaker need instantaneous or overload gear adjustment, the circuit breaker with corresponding gear must be customized by the circuit breaker manufacturers; meanwhile, in the production process of the circuit breaker, the face cover is in an unassembled state in the gear adjustment process of the short-circuit instantaneous protection and overload protection of the thermomagnetic release of the circuit breaker, when the overload protection function is checked or tested after the face cover is assembled, the face cover is unqualified, and the face cover must be disassembled again to carry out overload delay adjustment, so that the working efficiency is affected.
In addition, in order to increase outside adjustable function, the instantaneous protection of short circuit has generally increased the intermediate link that tripping traction lever pushing mechanism traction lever realized the product and tripped the outage, because the increase of intermediate link, can lead to the instantaneous trip time extension of short circuit, is unfavorable for the quick tripping outage of circuit breaker, and has reduced the reliability of tripping.
Disclosure of Invention
The utility model aims to overcome at least one defect in the prior art and provides a thermomagnetic tripping device of a circuit breaker.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
the thermal magnetic tripping device of the circuit breaker comprises a shell, a thermal magnetic tripping device and a mechanism traction rod, wherein the thermal magnetic tripping device is arranged in the shell and comprises a thermal tripping device, a tripping traction rod, a magnetic tripping device, a magnetic adjusting rod and a magnetic adjusting spring, the thermal tripping device is in driving connection with the mechanism traction rod through the tripping traction rod and is provided with a thermal tripping gap with the tripping traction rod, the magnetic adjusting rod is in linkage with the magnetic tripping device through the magnetic adjusting spring, the magnetic tripping device is provided with a magnetic tripping gap and is in driving connection with the mechanism traction rod, and a first thermal adjusting piece for adjusting the thermal tripping gap and a first magnetic adjusting piece for adjusting the magnetic tripping gap are arranged in the shell; the thermal tripping device is provided with a second thermal regulating piece for regulating the thermal tripping gap, and one end of the second thermal regulating piece is exposed out of the shell; the magnetic tripping device is provided with a second magnetic adjusting piece for adjusting the stretching amount of the magnetic force adjusting spring, and one end of the second magnetic adjusting piece is exposed outside the shell.
Preferably, the second magnetic adjusting piece is rotatably installed on the shell, an annular boss is arranged on the second magnetic adjusting piece, a plurality of second magnetic adjusting piece gear grooves with gradually changing groove depths along the rotation direction are formed in the peripheral wall of the annular boss, and the groove depth direction of the second magnetic adjusting piece gear grooves is perpendicular to the axial direction of the magnetic adjusting spring; the magnetic adjusting rod is rotatably arranged in the shell and positioned at one side below the second magnetic adjusting piece, the magnetic adjusting rod is provided with a magnetic adjusting rod push rod protruding upwards, and the top end of the magnetic adjusting rod push rod extends towards the annular boss to form a gear end head which is matched with the gear groove of the second magnetic adjusting piece.
Preferably, the magnetic tripping device comprises a bracket, an armature rotating shaft, an armature and a magnetic yoke, wherein the magnetic yoke is fixedly arranged on the bracket, an armature installation part of the armature positioned in the middle part is rotatably arranged on the bracket through the armature rotating shaft, a gap between an armature adjusting part at one end of the armature and the magnetic yoke is the magnetic tripping gap, and an armature pushing part at the other end of the armature is used for pushing a first driven part of a traction rod of the mechanism; one end of the magnetic force adjusting spring is connected to the magnetic adjusting rod hook of the magnetic adjusting rod, and the other end of the magnetic force adjusting spring is connected to the armature hook on the armature adjusting part.
Preferably, the bracket is provided with a bracket adjusting part positioned right above the armature adjusting part, and the first magnetic adjusting piece is in threaded connection with the bracket adjusting part and is abutted to the armature adjusting part after penetrating out of the bracket adjusting part.
Preferably, the armature installation part is of a U-shaped structure and is perpendicular to the armature adjusting part, the closed end of the armature installation part is in fit connection with the armature adjusting part, and two arms at the opening end of the armature installation part extend obliquely upwards and then reversely extend to the armature adjusting part to form the hook-shaped armature pushing part.
Preferably, the armature adjusting part is provided with two armature hooks positioned at two sides for hooking the magnetic force adjusting spring.
Preferably, the trip traction rod is rotatably installed in the shell, the thermal trip device comprises a thermal element and a bimetal element which are connected, the first thermal regulating element is of a screw structure, is in threaded connection with the bimetal element and corresponds to a trip traction rod inclined plane on the trip traction rod, the trip traction rod inclined plane has a gradient difference in the axial direction of the first thermal regulating element, and a gap between the first thermal regulating element on the bimetal element and the trip traction rod inclined plane on the trip traction rod is the thermal trip gap.
Preferably, the trip traction rod is movably arranged in the shell, a second thermal regulating member eccentric shaft is arranged at the bottom of the second thermal regulating member, and is inserted into a trip traction rod regulating groove on the trip traction rod and can move in the trip traction rod regulating groove, and the moving direction of the second thermal regulating member eccentric shaft and the moving direction of the trip traction rod are parallel to the axial direction of the first thermal regulating member; the second thermal regulating piece eccentric shaft pushes the side wall of the tripping traction rod regulating groove, so that the tripping traction rod and the inclined plane of the tripping traction rod on the tripping traction rod move, and the thermal tripping clearance is regulated.
Preferably, the second thermal regulating member is provided with a second thermal regulating member body rotatably arranged on the shell, a tripping traction rod regulating groove is formed in the top end of the second thermal regulating member body, and the outer wall of the bottom end of the second thermal regulating member body is provided with the second thermal regulating member eccentric shaft; and the trip traction rod is provided with a limiting boss positioned below the second thermal regulating part body, and the trip traction rod regulating groove is a kidney-shaped hole penetrating through the limiting boss.
Preferably, the trip traction lever is provided with a convex trip traction lever push rod on a side facing the mechanism traction lever for pushing the second driven part of the mechanism traction lever.
The circuit breaker thermomagnetic tripping device has internal thermomagnetic regulation and external thermomagnetic regulation, and in the production process of the circuit breaker, the first thermoregulating piece and the first magnetic regulating piece can be regulated to ensure that the circuit breaker has specific thermotripping characteristics and magnetic tripping characteristics, so that the circuit breaker accords with specific use scenes; when the practical scene of a customer is changed, the tripping characteristic of the circuit breaker can be changed through the second thermal regulating piece and the second magnetic regulating piece under the condition that the face cover of the circuit breaker shell is not disassembled, so as to meet the requirements of different use scenes of the customer.
In addition, the gear groove of the second magnetic adjusting piece is matched with the gear end of the magnetic adjusting rod, so that the magnetic tripping force is adjustable, and the requirements of different use scenes are met.
In addition, the magnetic tripping device directly acts on the mechanism traction rod, intermediate rotation links are reduced, the tripping time of the circuit breaker is shortened, the circuit breaker is safer and more reliable, and the magnetic adjusting spring simultaneously realizes the magnetic adjusting and armature resetting functions.
Drawings
Fig. 1 is a schematic view of a circuit breaker of the present utility model;
FIG. 2 is a schematic diagram of the thermal magnetic release of the present utility model mounted to a housing;
FIG. 3 is a schematic diagram of a thermal magnetic trip of the present utility model;
FIG. 4 is a schematic diagram of a magnetic trip device of the present utility model;
FIG. 5 is a schematic view of a second magnetic adjustment member and magnetic adjustment lever of the present utility model;
fig. 6 is a schematic view of the mounting structure of the bracket and armature of the present utility model;
FIG. 7 is a schematic illustration of an armature of the present utility model;
FIG. 8 is a schematic diagram of a thermal trip apparatus of the present utility model;
FIG. 9 is a schematic view of a second thermal adjustment and trip bar of the present utility model;
1, a shell; 11 a first mounting base; 110 a first mount set screw; 12 a second mount;
2 a mechanism traction rod; 21 a first driven portion; 22 a second driven portion;
3, a thermomagnetic release; 30, fixing screws of the thermomagnetic release;
4, a thermal tripping device; a thermal element 41; a 42 bimetallic element;
5 magnetic trip device; a 51 bracket; 511 a bracket adjustment portion; 52 armature shaft; 53 armature; 531 armature adjustment; 532 armature mounting portion; 533 armature push portion; 534 armature hook; 54 yokes;
6, tripping a traction rod; 601 trip drawbar ramp; 602 trip drawbar push rod; 603 limit the boss; 604 trip bar adjustment slots; a first thermal conditioning element 61; a second thermal conditioning element 62; 621 a second thermal conditioning element conditioning slot; 622 a second thermal conditioner body; 623 a second thermal regulator eccentric shaft;
7, magnetic adjusting rods; 701 magnetic adjusting rod pushing rod; 702 gear end; 703 magnetic adjusting rod hooks; 71 a first magnetic adjustment member; a second magnetic adjustment member 72; 721 a second magnetic adjuster adjustment slot; 722 annular boss; 723 a second magnetic adjuster shift slot; 73 magnetic force adjusting springs.
Detailed Description
The following examples are given in connection with the accompanying drawings to further illustrate specific embodiments of the thermal-magnetic trip apparatus for a circuit breaker of the present utility model. The thermal magnetic trip apparatus of the circuit breaker of the present utility model is not limited to the description of the following embodiments.
As shown in fig. 1-3, the thermomagnetic tripping device of the circuit breaker of the utility model comprises a shell 1, a thermomagnetic tripping device 3 and a mechanism traction rod 2, wherein the thermomagnetic tripping device 3 comprises a thermotripping device 4, a tripping traction rod 6, a magnetic tripping device 5, a magnetic adjusting rod 7 and a magnetic adjusting spring 73, a first mounting seat 11 is fixed on the shell 1 and positioned on one side of the mechanism traction rod 2 through a first mounting seat fixing screw 110, the tripping traction rod 6 and the magnetic adjusting rod 7 are respectively arranged on the first mounting seat 11 of the shell 1, the tripping traction rod 6 is positioned above the magnetic adjusting rod 7, and a second mounting seat 12 of the shell 1 is arranged on the first mounting seat 11. The thermal tripping device 4 is in driving connection with the mechanism traction rod 2 through a tripping traction rod 6, a thermal tripping gap is formed between the thermal tripping device and the tripping traction rod 6, the magnetic adjusting rod 7 is in linkage with the magnetic tripping device 5 through a magnetic adjusting spring 73, and the magnetic tripping device 5 is provided with a magnetic tripping gap and is in driving connection with the mechanism traction rod 2.
In particular, the housing 1 is provided therein with a first thermal adjustment member 61 for adjusting the thermal trip gap and a first magnetic adjustment member 71 for adjusting the magnetic trip gap; the thermal tripping device 4 is provided with a second thermal regulating element 62 for regulating the thermal tripping gap, one end of the second thermal regulating element 62 is provided with a second thermal regulating element regulating groove 621 which can be operated and is exposed outside the shell 1; the magnetic tripping device 5 is provided with a second magnetic adjusting piece 72 for adjusting the stretching amount of the magnetic adjusting spring 73, one end of the second magnetic adjusting piece 72 is provided with a second magnetic adjusting piece adjusting groove 721 which can be operated and is exposed outside the shell 1. The circuit breaker thermomagnetic tripping device has both internal thermomagnetic regulation and external thermomagnetic regulation, and in the production process of the circuit breaker, the first thermal regulating piece 61 and the first magnetic regulating piece 71 can be regulated to ensure that the circuit breaker has specific thermal tripping characteristics and magnetic tripping characteristics, so that the circuit breaker accords with specific use scenes; when the practical scene of the customer changes, the tripping characteristic of the circuit breaker can be changed through the second thermal regulating piece 62 and the second magnetic regulating piece 72 without disassembling the face cover of the circuit breaker housing 1 so as to meet the requirements of different use scenes of the customer.
As shown in fig. 4-5, the second magnetic adjusting member 72 is rotatably mounted on the second mounting seat 12 of the housing 1, an annular boss 722 is provided on the second magnetic adjusting member 72, a plurality of second magnetic adjusting member gear grooves 723 with gradually changing (increasing or decreasing) groove depths along the rotation direction are provided on the outer peripheral wall of the annular boss 722, and the groove depth direction of the second magnetic adjusting member gear grooves 723 is perpendicular to the axial direction of the magnetic adjusting spring 73; the magnetic adjusting rod 7 is rotatably installed in the housing 1 and is located at one side below the second magnetic adjusting piece 72, the magnetic adjusting rod 7 is provided with an upward protruding magnetic adjusting rod pushing rod 701, and the top end of the magnetic adjusting rod pushing rod 701 extends to the annular boss 722 to form a gear end 702 and is matched with a gear groove 723 of the second magnetic adjusting piece. The magnetic adjusting push rod 7 is acted by the magnetic adjusting spring force 73, so that the gear end 702 is clung to the second magnetic adjusting piece 72, the second magnetic adjusting piece 72 is rotated through the second magnetic adjusting piece adjusting groove 721, the gear end 702 of the magnetic adjusting rod push rod 701 falls into the second magnetic adjusting piece gear groove 723 with different groove depths due to the acting force of the magnetic adjusting spring 73, and accordingly, the magnetic adjusting rod 7 obtains different rotation angles, the magnetic adjusting spring 73 obtains different stretching amounts, the pushing force of the armature 53 is changed through changing the spring force value of the magnetic adjusting spring 73, and the magnetic tripping force is adjustable so as to meet the requirements of different use scenes. It should be noted that, this is a preferred embodiment, the reliability of the adjusted position can be improved; as other embodiments, a scheme of arc-shaped surface with gradually changing radius can be adopted.
As shown in fig. 6-7, the magnetic trip device 5 includes a bracket 51, an armature rotating shaft 52, an armature 53 and a yoke 54, the yoke 54 is fixedly mounted on the bracket 51, an armature mounting portion 532 located in the middle of the armature 53 is rotatably mounted on the bracket 51 through the armature rotating shaft 52, a gap between an armature adjusting portion 531 at one end of the armature 53 and the yoke 54 is the magnetic trip gap, and an armature pushing portion 533 at the other end of the armature 53 is used for pushing the first driven portion 21 of the mechanism traction rod 2; one end of the magnetic force adjusting spring 73 is connected to a magnetic adjusting rod hook 703 of the magnetic adjusting rod 7, the other end of the magnetic force adjusting spring 73 is connected to armature hooks 534 on the armature adjusting portion 531, the number of the armature hooks 534 is preferably two, and the two armature hooks 534 are symmetrically arranged on two sides of the armature adjusting portion 531. When short-circuit current occurs in the circuit, the armature 53 on the magnetic tripping device 5 is rotated by the magnetic force of the magnetic yoke 54, and the armature pushing part 533 pushes the mechanism traction rod 2 to rotate until the circuit breaker trips and is disconnected. The magnetic tripping device directly acts on the mechanism traction rod, intermediate rotation links are reduced, the tripping time of the circuit breaker is reduced, the circuit breaker is safer and more reliable, the magnetic adjusting spring simultaneously realizes the magnetic adjusting and armature resetting functions, and the structure is simplified.
Specifically, the armature installation portion 532 is in a U-shaped structure and is perpendicular to the armature adjusting portion 531, a closed end of the armature installation portion 532 is in fit connection with the armature adjusting portion 531, two arms at an open end of the armature installation portion 532 extend obliquely upwards and then extend reversely to the armature adjusting portion 531 to form a hook-shaped armature pushing portion 533, and the armature pushing portion 533 is provided with an arc surface and is used for being matched with the first driven portion 21. The armature has simple structure, is convenient to install, produce and manufacture, and ensures that the magnetic tripping action of the circuit breaker is quick and reliable. Preferably, the armature adjusting portion 531 is integrally connected to the armature mounting portion 532, although a separate piece may be used and a retaining hole may be added to lock the position or other positioning means with a fastening screw.
As shown in fig. 6, the bracket 51 is provided with a bracket adjusting portion 511 located directly above the armature adjusting portion 531, and the first magnetic adjusting member 71 has a screw structure, is screwed to the bracket adjusting portion 511, and abuts against the armature adjusting portion 531 after being threaded out from the bracket adjusting portion 511. The first magnetic adjusting member 71 is rotated to drive the armature adjusting portion 531 to directly adjust the magnetic trip gap.
As shown in fig. 8-9, the trip traction rod 6 is rotatably installed in the casing 1, the thermal trip device 4 includes a thermal element 41 and a bimetal element 42, the yoke 54 is connected to one side surface of the thermal element 41, one end of the bimetal element 42 is connected to the other side surface of the thermal element 41, the other end of the bimetal element 42 is provided with the first thermal adjustment member 61, the first thermal adjustment member 61 is in a screw structure, is in threaded connection with the bimetal element 42, and corresponds to a trip traction rod inclined surface 601 on the trip traction rod 6, the trip traction rod inclined surface 601 has a gradient difference in an axial direction of the first thermal adjustment member 61, and a gap between the first thermal adjustment member 61 on the bimetal element 42 and the trip traction rod inclined surface 601 on the trip traction rod 6 is the thermal trip gap. When overload current occurs in the circuit of the circuit breaker, the thermal element 41 heats to enable the bimetal element 42 to be heated and bent, the first thermal regulating piece 61 on the bimetal element 42 pushes the trip traction rod inclined plane 601, the trip traction rod 6 rotates, and the trip traction rod 6 drives the mechanism traction rod 2 to rotate until the circuit breaker trips and is powered off; since the trip bar inclined surface 601 is an inclined surface, the first thermal adjustment member 61 is screwed in or out, so that the thermal trip gap is changed.
Further, the trip traction rod 6 is movably installed in the casing 1, a second thermal adjustment member eccentric shaft 623 is arranged at the bottom of the second thermal adjustment member 62, the second thermal adjustment member eccentric shaft 623 is inserted into the trip traction rod adjusting groove 604 on the trip traction rod 6 and can move in the trip traction rod adjusting groove 604, and the moving direction of the second thermal adjustment member eccentric shaft 623 and the moving direction of the trip traction rod 6 are parallel to the axial direction of the first thermal adjustment member 61; the second thermal regulating member eccentric shaft 623 pushes the side wall of the trip traction rod regulating groove 604 to move the trip traction rod 6 and the trip traction rod inclined plane 601 on the trip traction rod 6, so as to realize the regulation of the thermal trip gap. The second thermal regulating member 62 is provided with a second thermal regulating member body 622 rotatably installed on the second installation seat 12 of the casing 1, a trip traction rod regulating groove 604 is arranged on the top end of the second thermal regulating member body 622, the outer wall of the bottom end is provided with a second thermal regulating member eccentric shaft 623, and the second thermal regulating member body 622 is parallel to the central axis of the second thermal regulating member eccentric shaft 623 but not on the same straight line; the trip traction lever 6 is provided with a limiting boss 603 below the second thermal regulating member body 622, and the trip traction lever regulating groove 604 is a kidney-shaped hole penetrating through the limiting boss 603. The second thermal regulating piece 62 is rotated through the second thermal regulating piece regulating groove 621, and the eccentric shaft 623 of the second thermal regulating piece 62 pushes the trip traction rod regulating groove 604 to move the trip traction rod 6 left and right, and the trip traction rod 6 moves the trip traction rod inclined plane 601 left and right, so that the thermal trip gap is changed, and the circuit breaker obtains different thermal trip time.
As shown in fig. 8-9, the trip bar 6 is provided with a protruding trip bar push rod 602 on the side facing the mechanism bar 2 for pushing the second driven portion 22 of the mechanism bar 2. The trip traction rod push rod 602 is only in contact fit with the second driven part 22, so that interference and limitation on the mechanism traction rod 2 are avoided, the mechanism traction rod 2 is additionally connected with limitation, and the reliability of the circuit breaker is guaranteed. The trip bar push rod 602 pushes the mechanism bar 2 only preferably, but not limitedly, and the trip bar link may be used to drive the mechanism bar 2 to form a rolling fit or other driving scheme.
It should be noted that, in the description of the present utility model, the terms "upper", "lower", "left", "right", "inner", "outer", and the like indicate an orientation or a positional relationship based on that shown in the drawings or an orientation or a positional relationship conventionally put in use, and are merely for convenience of description, and do not indicate that the apparatus or element to be referred to must have a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," "third," and the like are used merely to distinguish between descriptions and should not be construed as indicating relative importance.
The foregoing is a further detailed description of the utility model in connection with the preferred embodiments, and it is not intended that the utility model 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 utility model, and these should be considered to be within the scope of the utility model.
Claims (10)
1. The utility model provides a circuit breaker thermomagnetic trip device, includes shell (1) and installs thermomagnetic trip (3) and mechanism traction lever (2) in shell (1), thermomagnetic trip (3) are including thermomagnetic trip device (4), trip traction lever (6), magnetic trip device (5), magnetic adjustment pole (7) and magnetic force adjusting spring (73), thermomagnetic trip device (4) are connected with mechanism traction lever (2) drive through trip traction lever (6) to have thermotrip clearance with trip traction lever (6) between, magnetic adjustment pole (7) are through magnetic force adjusting spring (73) and magnetic trip device (5) linkage, magnetic trip device (5) have magnetic trip clearance to be connected with mechanism traction lever (2) drive, its characterized in that: a first thermal regulating piece (61) for regulating the thermal tripping gap and a first magnetic regulating piece (71) for regulating the magnetic tripping gap are arranged in the shell (1); the thermal tripping device (4) is provided with a second thermal regulating piece (62) for regulating the thermal tripping gap, and one end of the second thermal regulating piece (62) is exposed out of the shell (1); the magnetic tripping device (5) is provided with a second magnetic adjusting piece (72) for adjusting the stretching amount of the magnetic adjusting spring (73), and one end of the second magnetic adjusting piece (72) is exposed out of the shell (1).
2. The circuit breaker thermo-magnetic trip apparatus of claim 1 wherein: the second magnetic adjusting piece (72) is rotatably arranged on the shell (1), an annular boss (722) is arranged on the second magnetic adjusting piece (72), a plurality of second magnetic adjusting piece gear grooves (723) with gradually changed groove depths along the rotation direction are formed in the peripheral wall of the annular boss (722), and the groove depth direction of the second magnetic adjusting piece gear grooves (723) is perpendicular to the axial direction of the magnetic adjusting spring (73); the magnetic adjusting rod (7) is rotatably arranged in the shell (1) and is positioned on one side below the second magnetic adjusting piece (72), the magnetic adjusting rod (7) is provided with an upward protruding magnetic adjusting rod push rod (701), and the top end of the magnetic adjusting rod push rod (701) extends to the annular boss (722) to form a gear end (702) and is matched with the gear groove (723) of the second magnetic adjusting piece.
3. The circuit breaker thermo-magnetic trip apparatus of claim 1 wherein: the magnetic tripping device (5) comprises a bracket (51), an armature rotating shaft (52), an armature (53) and a magnetic yoke (54), wherein the magnetic yoke (54) is fixedly arranged on the bracket (51), an armature installation part (532) of the armature (53) positioned in the middle is rotatably arranged on the bracket (51) through the armature rotating shaft (52), a gap between an armature adjusting part (531) at one end of the armature (53) and the magnetic yoke (54) is the magnetic tripping gap, and an armature pushing part (533) at the other end of the armature (53) is used for pushing a first driven part (21) of a traction rod (2) of the mechanism; one end of the magnetic force adjusting spring (73) is connected to a magnetic adjusting rod hook (703) of the magnetic adjusting rod (7), and the other end of the magnetic force adjusting spring (73) is connected to an armature hook (534) on the armature adjusting part (531).
4. The circuit breaker thermo-magnetic trip apparatus according to claim 3 wherein: the bracket (51) is provided with a bracket adjusting part (511) positioned right above the armature adjusting part (531), and the first magnetic adjusting piece (71) is in threaded connection with the bracket adjusting part (511) and is abutted on the armature adjusting part (531) after penetrating out of the bracket adjusting part (511).
5. The circuit breaker thermo-magnetic trip apparatus according to claim 3 wherein: the armature installation portion (532) is of a U-shaped structure and is perpendicular to the armature adjusting portion (531), the closed end of the armature installation portion (532) is connected with the armature adjusting portion (531) in a fitting mode, and two arms at the opening end of the armature installation portion (532) extend upwards obliquely firstly and then extend towards the armature adjusting portion (531) reversely to form the hook-shaped armature pushing portion (533).
6. The circuit breaker thermo-magnetic trip apparatus according to claim 3 wherein: two armature hooks (534) positioned on two sides are arranged on the armature adjusting part (531) and are used for hooking the magnetic force adjusting spring (73).
7. The circuit breaker thermo-magnetic trip apparatus of claim 1 wherein: the trip traction rod (6) is rotatably arranged in the shell (1), the thermal trip device (4) comprises a thermal element (41) and a bimetal element (42) which are connected, the first thermal adjustment piece (61) is of a screw structure, is in threaded connection with the bimetal element (42) and corresponds to a trip traction rod inclined plane (601) on the trip traction rod (6), the trip traction rod inclined plane (601) has gradient difference in the axial direction of the first thermal adjustment piece (61), and a gap between the first thermal adjustment piece (61) on the bimetal element (42) and the trip traction rod inclined plane (601) on the trip traction rod (6) is the thermal trip gap.
8. The circuit breaker thermo-magnetic trip apparatus of claim 7, wherein: the trip traction rod (6) is movably arranged in the shell (1), a second thermal regulating element eccentric shaft (623) is arranged at the bottom of the second thermal regulating element (62), the second thermal regulating element eccentric shaft (623) is inserted into a trip traction rod regulating groove (604) on the trip traction rod (6) and can move in the trip traction rod regulating groove (604), and the moving direction of the second thermal regulating element eccentric shaft (623) and the moving direction of the trip traction rod (6) are parallel to the axial direction of the first thermal regulating element (61); the second thermal regulating piece eccentric shaft (623) pushes the side wall of the tripping traction rod regulating groove (604) to enable the tripping traction rod (6) and the tripping traction rod inclined surface (601) on the tripping traction rod (6) to move, so as to realize the regulation of the thermal tripping gap.
9. The circuit breaker thermo-magnetic trip apparatus of claim 8, wherein: the second thermal regulating piece (62) is provided with a second thermal regulating piece body (622) rotatably arranged on the shell (1), a tripping traction rod regulating groove (604) is arranged at the top end of the second thermal regulating piece body (622), and the outer wall of the bottom end is provided with a second thermal regulating piece eccentric shaft (623); and a limiting boss (603) positioned below the second thermal regulating piece body (622) is arranged on the tripping traction rod (6), and the tripping traction rod regulating groove (604) is a kidney-shaped hole penetrating through the limiting boss (603).
10. The circuit breaker thermo-magnetic trip apparatus of claim 1 wherein: the trip traction lever (6) is provided with a convex trip traction lever push rod (602) on the side facing the mechanism traction lever (2) for pushing the second driven part (22) of the mechanism traction lever (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320214118.9U CN220172041U (en) | 2023-02-14 | 2023-02-14 | Thermomagnetic tripping device of circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320214118.9U CN220172041U (en) | 2023-02-14 | 2023-02-14 | Thermomagnetic tripping device of circuit breaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220172041U true CN220172041U (en) | 2023-12-12 |
Family
ID=89066665
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320214118.9U Active CN220172041U (en) | 2023-02-14 | 2023-02-14 | Thermomagnetic tripping device of circuit breaker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220172041U (en) |
-
2023
- 2023-02-14 CN CN202320214118.9U patent/CN220172041U/en active Active
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