CN219759500U - Circuit breaker thermal overload adjustable device - Google Patents
Circuit breaker thermal overload adjustable device Download PDFInfo
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- CN219759500U CN219759500U CN202321165087.9U CN202321165087U CN219759500U CN 219759500 U CN219759500 U CN 219759500U CN 202321165087 U CN202321165087 U CN 202321165087U CN 219759500 U CN219759500 U CN 219759500U
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- circuit breaker
- push rod
- adjusting piece
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- rod
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- 238000005452 bending Methods 0.000 claims description 14
- 230000005540 biological transmission Effects 0.000 claims description 14
- 230000006978 adaptation Effects 0.000 claims 1
- 238000009413 insulation Methods 0.000 abstract description 7
- 230000002411 adverse Effects 0.000 abstract description 3
- 230000000694 effects Effects 0.000 abstract description 3
- 230000007246 mechanism Effects 0.000 description 18
- 230000016507 interphase Effects 0.000 description 4
- 239000002184 metal Substances 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
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- 230000007423 decrease Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000002923 metal particle Substances 0.000 description 1
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Abstract
A thermal overload adjustable device of a circuit breaker belongs to the technical field of a low-voltage electrical appliance. The circuit breaker includes operating device, casing, traction lever, release and heat overload adjustable device, and operating device's action realizes closing of circuit breaker, thereby the electric current that flows in the release detection circuit gives the trigger action, actuates traction lever unblock operating device, realizes breaking of circuit breaker, and heat overload adjustable device includes knob, push rod, and the push rod slides and sets up on the casing, and the knob sets up on the casing and rotates and drive the push rod and slide, and characteristics are: the thermal overload adjustable device further comprises an adjusting piece, an actuating part is arranged on the adjusting piece, the adjusting piece is arranged on the traction rod and rotates synchronously with the traction rod, the adjusting piece is matched with the push rod, the adjusting piece slides along the axial direction of the traction rod under the pushing of the push rod, and the actuating part is caused to be different from a gap corresponding to the actuating piece on the bimetallic strip arranged on the release, so that the requirements of different overload currents are met. The advantages are that: adverse effects of the thermally adjustable traction rod on phase insulation are avoided, and good phase insulation capability is ensured.
Description
Technical Field
The utility model belongs to the technical field of piezoelectric devices, and particularly relates to a circuit breaker thermal overload adjustable device.
Background
In the existing low voltage circuit breaker, in order to adapt to different loads, the protection functions of the circuit breaker are required to be diversified, such as: the added overload protection and short-circuit protection are adjustable to meet the protection of different loads; the current common implementation mode of overload protection is adjustable: the mechanism traction rod is arranged on the operating mechanism and is responsible for unlocking the operating mechanism, and the thermally adjustable traction rod is arranged on the mechanism traction rod and is used for adjusting overload current; when the current is overloaded, the thermally adjustable traction rod drives the traction rod of the mechanism to rotate and unlock; the rotary knob is rotated to drive the thermally adjustable traction rod to axially move, so that the idle stroke of each phase is synchronously adjusted, and overload adjustment is realized. However, in high voltage application, because the inter-phase voltage is very high, the metal gas generated by breaking is more, and the requirement on the inter-phase insulation capability is very high, and the thermal adjustable traction rod needs to axially displace, so that the common mode of improving the inter-phase insulation capability through the traction rod flange has poor effect.
In view of the above-described prior art, there is a need for a reasonable improvement in the structure of existing circuit breaker thermal overload adjustment devices. To this end, the inventors have advantageously devised that the technical solutions described below are created in this context.
Disclosure of Invention
The utility model aims to provide a thermal overload adjustable device of a circuit breaker, which is characterized in that an adjusting piece capable of adjusting overload current is arranged, a push rod positioned outside a shell is additionally arranged to synchronously push each phase adjusting piece, the adverse influence of a thermal adjustable traction rod on phase insulation is avoided, and good phase insulation capability is ensured.
The utility model accomplishes the task like this, a circuit breaker thermal overload adjustable device, a circuit breaker includes actuating mechanism, casing, traction lever, release and thermal overload adjustable device, the action of actuating mechanism realizes the closing and opening of circuit breaker, the release detects the electric current that flows in the circuit and gives out the trigger action, actuates traction lever unblock actuating mechanism, realizes the breaking of circuit breaker, thermal overload adjustable device includes knob, push rod, the push rod slides and sets up on the casing, the knob sets up on the casing and rotates and drives the push rod and slide, characteristics are: the thermal overload adjustable device further comprises an adjusting piece, an actuating part is arranged on the adjusting piece, the adjusting piece is arranged on the traction rod and rotates synchronously with the traction rod, the adjusting piece is matched with the push rod, and under the pushing of the push rod, the adjusting piece slides along the axial direction of the traction rod, so that the actuating part is different from the corresponding gap of the actuating piece on the bimetallic strip arranged on the release, and the requirements of different overload currents are met.
In a specific embodiment of the utility model, the adjusting member is provided with an opening, a sliding groove is formed in the opening along one axial side of the traction rod, a sliding rod is arranged on the traction rod, the sliding rod penetrates through the opening of the adjusting member and slides into the sliding groove to mount the adjusting member on the traction rod, and the relative sliding of the sliding rod and the sliding groove realizes the axial sliding of the adjusting member along the traction rod.
In another specific embodiment of the utility model, the adjusting piece is provided with a sliding surface, the main shaft of the traction rod is provided with a joint surface at the position corresponding to the sliding surface, the sliding rod consists of a straight arm part and a bending part, the width of the bending part is larger than that of the straight arm part, two ends of the straight arm part are respectively connected with the joint surface and the bending part, the width of the opening is larger than that of the bending part, and the groove width of the sliding groove is matched with that of the straight arm part.
In another specific embodiment of the utility model, the adjusting piece is provided with a clamping part perpendicular to the sliding groove in the extending direction of the sliding groove, the push rod is provided with a transmission part corresponding to the clamping part, and the transmission part is matched and assembled with the clamping part.
In still another specific embodiment of the present utility model, a sliding portion is disposed on the housing at a position corresponding to the body of the push rod, the body of the push rod is clamped in the sliding portion and slides along the sliding portion, a hole is disposed on the housing at a position corresponding to the transmission portion of the push rod along the sliding direction of the push rod, and the transmission portion passes through the hole and is matched with the clamping portion on the adjusting member.
In a further specific embodiment of the present utility model, a plurality of sets of symmetrically spaced bosses are provided on the housing along the sliding direction of the push rod, and spaces between the bosses of each set constitute a sliding portion.
In a further specific embodiment of the present utility model, a rack portion is provided at one end portion of the push rod, a gear portion engaged with the rack portion is provided on the knob, and the knob and the push rod are engaged with the rack portion through the gear portion.
In a further specific embodiment of the present utility model, a knob support part is provided at a lower portion of the gear part of the knob, and the knob is assembled with the housing by penetrating a knob mounting hole provided on the housing through the knob support part.
In yet another specific embodiment of the present utility model, when the actuating portion on the adjusting member is a wedge-shaped boss, the actuating member is a correspondingly disposed adjusting screw; when the actuating part on the adjusting piece is a cylindrical boss, the actuating piece is a wedge-shaped housing which is correspondingly arranged.
In yet a further specific embodiment of the utility model, the number of said adjustment members is the same as the number of poles of the circuit breaker.
The utility model has the beneficial effects that due to the adoption of the structure, the utility model has the following advantages: firstly, independently arranging an adjusting piece capable of adjusting overload current on each phase, and additionally arranging a push rod to synchronously push each phase adjusting piece, so that multi-phase linkage is realized, and adverse effects of the adjusting piece on phase insulation are avoided; second, because the push rod is installed in the outside of casing, the casing can effectively block disconnected metal gas and the metal particle that produces, prevents that the push rod from taking place insulating ability decline because of receiving the pollution to guarantee interphase insulating ability.
Drawings
Fig. 1 is an exploded view of an assembly of a circuit breaker according to the present utility model;
FIG. 2 is an exploded view of the assembly of the adjustment member and the drawbar of the utility model;
FIG. 3 is an exploded view of the assembly of the knob, push rod and housing of the present utility model;
fig. 4 is a schematic view of the assembly of the knob, push rod, adjustment member, drawbar and trip unit of the present utility model.
In the figure: 1. a base; 2. an operating mechanism, 21. A mechanism handle; 3. the device comprises a shell, 31, a hole, 32, a sliding part, 33, a boss and 34, and a knob mounting hole; 4. knob, 41, gear part, 42, knob support part; 5. the push rod, 51, the transmission part, 52, the rack part, 53, the body; 6. the adjusting piece, 61, the sliding surface, 62, the opening, 63, the chute, 64, the clamping part, 65, the actuating part and 66, the bulge; 7. traction rod, 71, joint surface, 72, slide bar, 721, straight arm part, 722 and bending part; 8. trip, 81. Bimetallic strip, 811. Actuator.
Detailed Description
The following detailed description of specific embodiments of the utility model, while given in connection with the accompanying drawings, is not intended to limit the scope of the utility model, and any changes that may be made in the form of the inventive concepts described herein, without departing from the spirit and scope of the utility model.
In the following description, any reference to the directions or azimuths of up, down, left, right, front and rear is based on the positions shown in the corresponding drawings, and therefore, should not be construed as a limitation on the technical solutions provided by the present utility model.
Referring to fig. 1, the utility model relates to a thermal overload adjustable device of a circuit breaker, the circuit breaker comprises a base 1, an operating mechanism 2, a shell 3, a traction rod 7 and a release 8, wherein the traction rod 7 is rotatably hinged on clamping plates at two sides of the operating mechanism 2 and is used for unlocking the operating mechanism 2, the operating mechanism 2 is arranged on the base 1 and is driven by a mechanism handle 21 installed on the operating mechanism 2 to rotate, a rotating shaft (not shown in the figure) of the circuit breaker is driven to act after the operating mechanism 2 acts, the rotating shaft drives a moving contact (not shown in the figure) of the circuit breaker to rotate so as to contact or separate from a fixed contact (not shown in the figure) of the circuit breaker, the release 8 detects current flowing in a circuit so as to give out trigger action, and the traction rod 7 is actuated to unlock the operating mechanism 2 so as to realize breaking of the circuit breaker. The thermal overload adjustable device comprises a knob 4, a push rod 5 and an adjusting piece 6, wherein the push rod 5 is arranged on a shell 3 of the circuit breaker in a sliding mode, the knob 4 is arranged on the shell 3 of the circuit breaker and rotates to drive the push rod 5 to slide, an actuating part 65 is arranged on the adjusting piece 6, the adjusting piece 6 is arranged on a traction rod 7 and rotates synchronously with the traction rod 7, the adjusting piece 6 is matched with the push rod 5, the adjusting piece 6 axially slides along the traction rod 7 under the pushing of the push rod 5, and the actuating part 65 is caused to be different from a corresponding gap of an actuating piece 811 arranged on a bimetallic strip 81 on a release 8 so as to meet the requirements of different overload currents.
When the circuit breaker needs the current adjustable function, the knob 4 arranged on the shell 3 can be used for rotating to drive the push rod 5 arranged on the shell 3 to slide, the sliding of the push rod 5 drives the adjusting piece 6 arranged on the traction rod 7 to slide, and the circuit breaker can be realized through the correspondence of the actuating part 65 arranged on the adjusting piece 6 and the actuating piece 811 arranged on the bimetallic strip 81 on the release 8.
As shown in fig. 2 to 4, the adjusting member 6 includes a sliding surface 61 and the actuating portion 65, where the sliding surface 61 cooperates with the traction rod 7, and the actuating portion 65 cooperates with an actuating member 811 on the bimetal 81 of the release 8. In this embodiment, the sliding surface 61 has a "l-shaped" structure, and the main shaft of the traction rod 7 is provided with an abutment surface 71 at a position corresponding to the sliding surface 61 of the adjusting member 6. An opening 62 is arranged at the upper part of the sliding surface 61, a sliding groove 63 is formed in the opening 62 along one side of the axial direction of the traction rod 7 in an extending mode, a sliding rod 72 is arranged on the traction rod 7 at a position corresponding to the sliding groove 63 of the adjusting piece 6, the sliding rod 72 penetrates through the opening 62 of the adjusting piece 6 and slides into the sliding groove 63 to mount the adjusting piece 6 on the traction rod 7, the sliding surface 61 is attached to the attaching surface 71, and relative sliding of the sliding rod 72 and the sliding groove 63 enables the adjusting piece 6 to axially slide along the traction rod 7. Specifically, the slide bar 72 is composed of a straight arm 721 and a bending portion 722, the width of the bending portion 722 is larger than that of the straight arm 721, and the two ends of the straight arm 721 are respectively connected to the bonding surface 71 and the bending portion 722, so that the slide bar 72 is in an inverted L shape or a T shape, and in this embodiment, the shape is preferably an inverted L shape. The width of the opening 62 is greater than the width of the bend 722, so that the bend 722 can pass through the opening 62 out of the adjusting element 6. The width of the sliding groove 63 of the adjusting member 6 is smaller than the width of the bending portion 722, but is matched with the straight arm portion 721 of the sliding rod 72, so that the adjusting member 6 can slide relative to the straight arm portion 721 and can rotate synchronously with the traction rod 7 and is not separated due to the blocking of the bending portion 722.
As shown in fig. 2 and 4, the adjusting member 6 is provided with a clamping portion 64 perpendicular to the sliding groove 63 in the extending direction of the sliding groove 63, the push rod 5 is provided with a transmission portion 51 at a position corresponding to the pair of clamping portions 64, and the transmission portion 51 is inserted into the clamping portion 64. In this embodiment, the engaging portion 64 is formed by a space between symmetrically disposed protrusions 66, and the transmission portion 51 is a circular boss. Of course, the two positions can be interchanged. The opening 62 and the chute 63 are adjacent and can be interchanged, and the clamping portion 64 is disposed on the left side of the opening 62 or the right side of the chute 63, or may be disposed on the left side of the chute 63 or the right side of the opening 62. Preferably, the engaging portion 64 is disposed on the right side of the chute 63.
As shown in fig. 3, the housing 3 is provided with a sliding portion 32 at a position corresponding to the body 53 of the push rod 5, the body 53 of the push rod 5 is clamped in the sliding portion 32 and slides along the sliding portion 32, the housing 3 is provided with a hole 31 at a position corresponding to the transmission portion 51 of the push rod 5 in the sliding direction of the push rod 5, and the transmission portion 51 is inserted into the clamping portion 64 of the adjusting member 6 through the hole 31. Preferably, the holes 31 are square holes. In this embodiment, a plurality of sets of symmetrically spaced bosses 33 are provided on the housing 3 along the sliding direction of the push rod 5, and the space between each set of bosses 33 constitutes the sliding portion 32. Of course, the sliding portion 32 may be formed of an elongated rail.
As shown in fig. 3 and 4, a rack portion 52 is provided at one end portion of the push rod 5, a gear portion 41 that mates with the rack portion 52 is provided on the knob 4, and the knob 4 and the push rod 5 are engaged with the rack portion 52 through the gear portion 41. A knob support part 42 is arranged at the lower part of the gear part 41 of the knob 4, and the knob 4 and the housing 3 are assembled by penetrating the knob support part 42 into a knob mounting hole 34 arranged on the housing 3.
As shown in fig. 3 and 4, an actuating portion 65 is disposed below the sliding surface 61 of the adjusting member 6, and the actuating portion 65 is disposed opposite to an actuating member 811 on a bimetal 81 on the circuit breaker release 8. When the actuating portion 65 of the adjusting member 6 is a wedge-shaped boss, the actuating member 811 is a correspondingly disposed adjusting screw, and when the actuating portion 65 of the adjusting member 6 is a cylindrical boss (not shown), the actuating member 811 is a correspondingly disposed wedge-shaped housing (not shown). In this embodiment, the actuating portion 65 is a wedge boss, and the actuating member 811 is an adjusting screw. When the current gear of the circuit breaker needs to be adjusted, the push rod 5 is driven to slide by rotating the knob 4, meanwhile, the push rod 5 drives the adjusting piece 6 to slide, and the change of the overload current is realized by changing the gap between the actuating part 65 on the adjusting piece 6 and the actuating piece 811 on the bimetallic strip 81.
The number of said adjustment members 6 is determined by, i.e. is the same as, the number of circuit breaker poles. When the circuit breaker is 2 poles, the number of the adjusting pieces 6 is 2; when the breaker is 3 poles, the number of the adjusting pieces 6 is 3; when the circuit breaker is 4 poles, the number of the adjusting parts 6 is 4, which is shown as a three-pole circuit breaker, namely, the number of the adjusting parts 6 is 3.
Claims (10)
1. The utility model provides a circuit breaker thermal overload adjustable device, the circuit breaker includes operating device (2), casing (3), traction lever (7), release (8) and thermal overload adjustable device, the action of operating device (2) realizes closing of circuit breaker, thereby the electric current that flows in release (8) detection circuit gives the trigger action, actuates traction lever (7) unblock operating device (2), realizes breaking of circuit breaker, thermal overload adjustable device includes knob (4), push rod (5) slip sets up on casing (3), knob (4) set up on casing (3) and rotate drive push rod (5) slip, its characterized in that: the thermal overload adjustable device further comprises an adjusting piece (6), an actuating part (65) is arranged on the adjusting piece (6), the adjusting piece (6) is arranged on the traction rod (7) and rotates synchronously with the traction rod (7), the adjusting piece (6) is matched with the push rod (5), the adjusting piece (6) axially slides along the traction rod (7) under the pushing of the push rod (5), and the actuating part (65) is caused to be different from a corresponding gap of an actuating piece (811) arranged on a bimetallic strip (81) on the release (8) so as to meet the requirements of different overload currents.
2. The circuit breaker thermal overload adjustment apparatus of claim 1, wherein: the adjusting piece (6) is provided with an opening (62), the opening (62) is provided with a sliding groove (63) along one axial side of the traction rod (7) in an extending mode, the traction rod (7) is provided with a sliding rod (72), the sliding rod (72) penetrates through the opening (62) of the adjusting piece (6) and slides into the sliding groove (63) to install the adjusting piece (6) on the traction rod (7), and relative sliding of the sliding rod (72) and the sliding groove (63) enables the adjusting piece (6) to axially slide along the traction rod (7).
3. The circuit breaker thermal overload adjustment apparatus of claim 2, wherein: be equipped with sliding surface (61) on adjusting part (6), the main shaft of drawbar (7) is gone up and is provided with fitting surface (71) in the position department of corresponding sliding surface (61), slide bar (72) are constituteed by straight arm (721) and portion of bending (722), the width of portion of bending (722) is greater than the width of straight arm (721), fitting surface (71) and portion of bending (722) are connected respectively at the both ends of straight arm (721), the width of opening (62) is greater than the width of portion of bending (722), the slot width of spout (63) with the width of straight arm (721) adaptation.
4. A circuit breaker thermal overload adjustment apparatus as claimed in claim 3 wherein: the adjusting piece (6) is provided with a clamping part (64) perpendicular to the sliding groove (63) in the extending direction of the sliding groove (63), a transmission part (51) is arranged on the push rod (5) at the position corresponding to the clamping part (64), and the transmission part (51) is assembled with the clamping part (64) in a matching way.
5. The circuit breaker thermal overload adjustment apparatus of claim 4, wherein: the sliding part (32) is arranged at the position of the body (53) corresponding to the push rod (5) on the shell (3), the body (53) of the push rod (5) is clamped in the sliding part (32) and slides along the sliding part (32), a hole (31) is formed in the position of the transmission part (51) of the shell (3) along the sliding direction of the push rod (5) and corresponding to the push rod (5), and the transmission part (51) penetrates through the hole (31) to be matched with the clamping part (64) on the adjusting piece (6).
6. The circuit breaker thermal overload adjustment apparatus of claim 5, wherein: a plurality of groups of bosses (33) are symmetrically arranged at intervals along the sliding direction of the push rod (5) on the shell (3), and the space between each group of bosses (33) forms a sliding part (32).
7. The circuit breaker thermal overload adjustment apparatus of claim 1, wherein: one end of the push rod (5) is provided with a rack part (52), the knob (4) is provided with a gear part (41) matched with the rack part (52), and the knob (4) and the push rod (5) are meshed with the rack part (52) through the gear part (41).
8. The circuit breaker thermal overload adjustment apparatus of claim 7, wherein: the lower part of the gear part (41) of the knob (4) is provided with a knob supporting part (42), and the knob supporting part (42) is inserted into a knob mounting hole (34) arranged on the shell (3) to realize the assembly of the knob (4) and the shell (3).
9. The circuit breaker thermal overload adjustment apparatus of claim 1, wherein: when the actuating part (65) on the adjusting piece (6) is a wedge-shaped boss, the actuating piece (811) is a correspondingly arranged adjusting screw; when the actuating part (65) on the adjusting piece (6) is a cylindrical boss, the actuating piece (811) is a wedge-shaped housing which is correspondingly arranged.
10. The circuit breaker thermal overload adjustment apparatus of claim 9, wherein: the number of the adjusting pieces (6) is the same as the number of poles of the circuit breaker.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321165087.9U CN219759500U (en) | 2023-05-15 | 2023-05-15 | Circuit breaker thermal overload adjustable device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321165087.9U CN219759500U (en) | 2023-05-15 | 2023-05-15 | Circuit breaker thermal overload adjustable device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219759500U true CN219759500U (en) | 2023-09-26 |
Family
ID=88084033
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321165087.9U Active CN219759500U (en) | 2023-05-15 | 2023-05-15 | Circuit breaker thermal overload adjustable device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219759500U (en) |
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2023
- 2023-05-15 CN CN202321165087.9U patent/CN219759500U/en active Active
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