CN109449064B - Electromagnetic trip device and circuit breaker - Google Patents
Electromagnetic trip device and circuit breaker Download PDFInfo
- Publication number
- CN109449064B CN109449064B CN201811536034.7A CN201811536034A CN109449064B CN 109449064 B CN109449064 B CN 109449064B CN 201811536034 A CN201811536034 A CN 201811536034A CN 109449064 B CN109449064 B CN 109449064B
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- 238000006243 chemical reaction Methods 0.000 claims description 15
- 238000005452 bending Methods 0.000 claims description 10
- 238000000034 method Methods 0.000 claims 1
- 238000012797 qualification Methods 0.000 abstract description 4
- 230000009286 beneficial effect Effects 0.000 description 4
- 230000005405 multipole Effects 0.000 description 3
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
- H01H71/10—Operating or release mechanisms
- H01H71/12—Automatic release mechanisms with or without manual release
- H01H71/24—Electromagnetic mechanisms
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
- H01H71/74—Means for adjusting the conditions under which the device will function to provide protection
- H01H71/7463—Adjusting only the electromagnetic mechanism
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- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Breakers (AREA)
Abstract
The invention relates to the field of piezoelectric devices, in particular to an electromagnetic tripping device, wherein one end of a magnetic yoke of the electromagnetic tripping device is connected with a temperature sensing connecting plate, the other end of the magnetic yoke is matched with an armature, the middle part of the armature is pivoted, and a tripping rod is matched with a tripping lock catch of a circuit breaker; when short-circuit current flows through the temperature sensing connecting plate, the first arm of the armature is attracted to swing towards the magnetic yoke, so that the second arm of the armature drives the trip bar to be in locking fit with the trip buckle, the breaker is opened, and the counterforce spring is used for resetting the armature; the magnetic gap adjusting screw is correspondingly arranged and in driving connection with the first armature arm, and the distance between the first armature arm and the magnetic yoke can be adjusted by screwing the magnetic gap adjusting screw; also disclosed is a circuit breaker employing the electromagnetic trip device; the electromagnetic tripping device has higher product qualification rate; the circuit breaker is better in action performance.
Description
Technical Field
The invention relates to the field of piezoelectric devices, in particular to an electromagnetic tripping device and a circuit breaker comprising the same.
Background
The electromagnetic tripping device is an important component unit of the molded case circuit breaker, converts a magnetic field generated by short-circuit current into mechanical action, and pushes the tripping rod to unlock with the tripping buckle of the circuit breaker so as to break the circuit breaker. In the existing electromagnetic tripping device, the space placement positions of a magnetic yoke and an armature are poor, a mechanism for adjusting instantaneous setting current is unstable, the influence of the rotation angle of a spring adjusting knob on the fluctuation of a force value of a counter-force spring is large, and the qualification rate is low; in addition, the space utilization rate is also insufficient, and an armature of the existing electromagnetic tripping device occupies double Jin Yanshi setting space, so that the delay adjusting traction rod is limited.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, and provides an electromagnetic tripping device, wherein a magnetic gap adjusting screw can be used for adjusting the distance between an armature and a magnetic yoke, so that the product percent of pass is higher; the circuit breaker comprises the electromagnetic tripping device, and the action performance is better.
In order to achieve the above purpose, the invention adopts the following technical scheme:
An electromagnetic tripping device comprises a temperature sensing connecting plate 1, a magnetic yoke 9, an armature 11, a tripping rod 12 and a counter-force spring 6, wherein one end of the magnetic yoke 9 is connected with the temperature sensing connecting plate 1, the other end is matched with the armature 11, the middle part of the armature 11 is pivoted and arranged, the electromagnetic tripping device comprises an armature first arm 112 in driving fit with the magnetic yoke 9 and an armature second arm 111 in driving fit with the tripping rod 12, and the tripping rod 12 is in locking fit with a tripping buckle 2 of a circuit breaker; when short-circuit current flows through the temperature sensing connecting plate 1, the armature first arm 112 is attracted to swing towards the magnetic yoke 9, so that the armature second arm 111 drives the trip rod 12 to release the locking fit with the trip button 2, the circuit breaker is opened, and the counterforce spring 6 is used for resetting the armature 11;
The magnetic gap adjusting device further comprises an armature bracket 8, one end of the armature bracket 8 is arranged on the temperature sensing connecting plate 1, the middle of the armature 11 is connected with the armature bracket 8 in a pivoted mode, the armature bracket 8 comprises a magnetic gap adjusting screw 7, the magnetic gap adjusting screw 7 is correspondingly arranged and in driving connection with an armature second arm 111, and the distance between the armature first arm 112 and the magnetic yoke 9 can be adjusted by screwing the magnetic gap adjusting screw 7.
Preferably, the armature bracket 8 has an L-shaped structure and comprises an armature bracket cross arm 81 and an armature bracket vertical arm 80 which are connected in a bending way, wherein the armature bracket cross arm 81 is connected with the temperature sensing connecting plate 1, and the magnetic gap adjusting screw 7 is arranged on the armature bracket vertical arm 80 and is in threaded connection with the armature bracket vertical arm 80; the armature 11 is in a V-shaped structure, the middle part of the armature 11 is pivotally connected with the armature bracket vertical arm 80, the armature second arm 111 is arranged opposite to the armature bracket vertical arm 80, and the armature first arm 112 is arranged opposite to the armature bracket cross arm 81.
Preferably, the armature bracket 8 further comprises an armature bracket cantilever 82 which is connected with the armature bracket vertical arm 80 in a bending way, and the two armature bracket cantilevers 82 are respectively arranged at two sides of the armature bracket vertical arm 80; the armature 11 further comprises an armature connecting arm 113 arranged in the middle of the armature connecting arm, the armature connecting arm 113 is connected with the armature first arm 112 in a bending way, the two armature connecting arms 113 are respectively arranged on two sides of one end, connected with the armature second arm 111, of the armature first arm 112, and the armature connecting arm 113 is connected with the armature bracket cantilever 82 in a pivoting way through the first pivot 10.
Preferably, the device also comprises a linkage rod 5 and a spring adjusting knob 3; the middle part of the linkage rod 5 is pivoted, and comprises a linkage rod driving arm 52 and a linkage rod driven arm 51 which extend out of the middle part of the linkage rod 5, one end of the reaction spring 6 is connected with the armature first arm 112, and the other end is connected with the linkage rod driving arm 52; the spring adjusting knob 3 is in driving connection with the linkage rod driven arm 51, the spring adjusting knob 3 is screwed, the linkage rod 5 is driven to rotate through the linkage rod driven arm 51, and the linkage rod driving arm 52 swings to adjust the tension of the counter-force spring 6 to the armature first arm 112.
Preferably, the spring adjusting knob 3 comprises a knob operating end 30 and a knob driving end 31, and the knob driving end 31 comprises a spiral bottom surface arranged at the lower end; the link lever driven arm 51 includes a spherical protrusion 510 provided at one end thereof, and the spherical protrusion 510 is drivingly connected to the screw bottom surface.
Preferably, the device further comprises a knob bracket 4, and the spring adjusting knob 3 is rotatably arranged on the knob bracket 4.
Preferably, the armature first arm 112 is connected to the linkage rod 5 by two symmetrically distributed reaction springs 6.
Preferably, the first armature arm 112 includes a first arm slot 1130 and a spring hanging hole 1120, the two first arm slots 1130 are respectively disposed at two ends of the middle portion of the first armature arm 112, one side of each first arm slot 1130 is provided with one spring hanging hole 1120, the two first arm slots 1130 are symmetrically disposed, and the two spring hanging holes 1120 are symmetrically disposed, and the armature connecting arm 113 and the spring hanging hole 1120 of the armature 11 are respectively disposed at two sides of the first arm slot 1130.
Preferably, the armature 11 has a V-shaped structure, and includes an armature first arm 112, an armature second arm 111, an armature connecting arm 113, a first arm slot 1130 and a spring hanging hole 1120, where the armature first arm 112 and the armature second arm 111 are bent and connected, the two armature connecting arms 113 are symmetrically disposed on two sides of one end of the armature first arm 112 connected with the armature second arm 111, two ends of the middle of the armature first arm 112 are respectively provided with a first arm slot 1130, one side of each first arm slot 1130 is provided with a spring hanging hole 1120, the two first arm slots 1130 are symmetrically disposed, the two spring hanging holes 1120 are symmetrically disposed, and the spring hanging hole 1120 and the armature connecting arm 113 are respectively located on two sides of the first arm slot 1130.
Preferably, the second armature arm 111 further includes a second arm first plate 1111 connected to the first armature arm 112 and a second arm second plate 1110 bent and connected to the second arm first plate 1111, the second arm second plate 1110 is bent toward the first armature arm 112, and the second arm second plate 1110 is in driving engagement with the trip rod 12.
Preferably, the middle part of the trip bar 12 is pivotally arranged, and comprises a trip bar driven arm 121 in driving fit with the armature second arm 111 and a trip bar locking arm 122 in locking fit with the trip buckle 2.
Preferably, the magnetic yoke 9 has a U-shaped structure, the temperature sensing connection plate 1 is connected with the bottom of the U-shaped structure, and the opening end of the U-shaped structure is in driving fit with the first armature arm 112.
Preferably, the magnetic yoke 9 is in a U-shaped structure, the temperature sensing connecting plate 1 passes through the middle part of the magnetic yoke 9 and is connected with the bottom of the U-shaped structure, the armature bracket cross arm 81 of the armature bracket 8 is arranged on the upper side of the temperature sensing connecting plate 1, the armature bracket vertical arm 80 of the armature bracket 8 is positioned on one side of the magnetic yoke 9, the armature 11 is arranged above the magnetic yoke 9 and is pivotally connected with the armature bracket vertical arm 80, the trip bar 12 is arranged above the armature 11, the trip bar driven arm 121 of the trip bar 12 is in driving fit with the armature second arm 111, and the trip bar locking arm 122 of the trip bar 12 is in locking fit with the trip buckle 2; the device further comprises a linkage rod 5 arranged on one side of the trip rod 12 and positioned above the armature 11 and a spring adjusting knob 3 arranged above the linkage rod 5, wherein the middle part of the linkage rod 5 is pivoted, the armature first arm 112 is connected with a linkage rod driving arm 52 of the linkage rod 5 through two symmetrically distributed counter-force springs 6, and the armature second arm 111 is positioned between the two counter-force springs 6 and is in driving fit with a trip rod driven arm 121, and the linkage rod driven arm 51 of the linkage rod 5 is in driving connection with the spring adjusting knob 3.
A circuit breaker comprising any one of said electromagnetic trip devices.
The electromagnetic tripping device comprises the armature, the armature bracket and the magnetic gap adjusting screw, wherein the armature comprises the first armature arm and the second armature arm, the magnetic gap adjusting screw is correspondingly arranged with the second armature arm, the distance between the first armature arm and the magnetic yoke can be adjusted by screwing the magnetic gap adjusting screw, the first armature arm and the magnetic yoke are guaranteed to be in an optimal matching state, stable and reliable action of the electromagnetic tripping device is guaranteed, even if a certain tolerance exists between the first armature arm and the magnetic yoke, and/or the assembly position of the first armature arm and the magnetic yoke is poor, namely, a certain error exists between the first armature arm and the magnetic yoke, the distance between the first armature arm and the magnetic yoke can be adjusted by rotating the magnetic gap adjusting screw, so that the optimal matching of the first armature arm and the magnetic yoke is realized, and the qualification rate of products is improved. In addition, the knob driving end of the spring adjusting knob comprises a spiral bottom surface, the spiral bottom surface is in driving fit with the spherical bulge of the linkage rod driven arm, the knob operation end enables the knob bottom surface to slide relatively with the spherical bulge, the linkage rod driven arm can swing up and down, accordingly, the linkage rod is enabled to rotate, the linkage rod drives the linkage rod driving arm to swing, accordingly, adjustment of the counter force spring on the tensile force of the armature first arm is achieved, fine adjustment of the tensile force is achieved due to the characteristic of continuous slow change of the knob ground, and accordingly the tensile force reaches the optimal state. Moreover, the spherical bulge is also beneficial to reducing the friction force between the spherical bulge and the spiral bottom surface, and is beneficial to the smoother rotation of the spring adjusting knob. The circuit breaker provided by the invention comprises the electromagnetic tripping device, and has better action performance.
Drawings
FIG. 1 is a schematic diagram of an electromagnetic trip device of the present invention;
Fig. 2 is a schematic structural view of the electromagnetic trip device of the present invention, showing an assembly structure of the armature, the armature bracket, the yoke, and the temperature sensing connection plate;
fig. 3 is a schematic view of the structure of an armature of the present invention;
FIG. 4 is a schematic structural view of the electromagnetic trip device of the present invention showing the assembled structure of the linkage, the spring adjustment knob and the reaction spring;
fig. 5 is a schematic structural view of the electromagnetic trip device of the present invention, which shows the assembly structure of the trip button, the trip bar, and the armature.
Detailed Description
The following examples are given in connection with fig. 1-5 to further illustrate embodiments of the electromagnetic trip device of the present invention. The electromagnetic trip device of the present invention is not limited to the description of the following embodiments.
The invention relates to an electromagnetic tripping device, which comprises a temperature sensing connecting plate 1, a magnetic yoke 9, an armature 11, a tripping rod 12 and a counter-force spring 6, wherein one end of the magnetic yoke 9 is connected with the temperature sensing connecting plate 1, the other end is matched with the armature 11, the middle part of the armature 11 is pivoted and arranged, the electromagnetic tripping device comprises an armature first arm 112 in driving fit with the magnetic yoke 9 and an armature second arm 111 in driving fit with the tripping rod 12, and the tripping rod 12 is in locking fit with a tripping buckle 2 of a circuit breaker; when short-circuit current flows through the temperature sensing connecting plate 1, the armature first arm 112 is attracted to swing towards the magnetic yoke 9, so that the armature second arm 111 drives the trip rod 12 to release the locking fit with the trip button 2, the circuit breaker is opened, and after the short-circuit current is eliminated, the counterforce spring 6 resets the armature 11;
The magnetic gap adjusting device further comprises an armature bracket 8, one end of the armature bracket 8 is arranged on the temperature sensing connecting plate 1, the middle of the armature 11 is connected with the armature bracket 8 in a pivoted mode, the armature bracket 8 comprises a magnetic gap adjusting screw 7, the magnetic gap adjusting screw 7 is correspondingly arranged and in driving connection with an armature second arm 111, and the distance between the armature first arm 112 and the magnetic yoke 9 can be adjusted by screwing the magnetic gap adjusting screw 7.
The electromagnetic tripping device comprises the armature 11, the armature bracket 8 and the magnetic gap adjusting screw 7, wherein the armature 11 comprises the armature first arm 112 and the armature second arm 111, the magnetic gap adjusting screw 7 and the armature second arm 111 are correspondingly arranged, the magnetic gap adjusting screw 7 is screwed to adjust the distance between the armature first arm 112 and the magnetic yoke 9, the armature first arm 112 and the magnetic yoke 9 are guaranteed to be in an optimal matching state, stable and reliable action of the electromagnetic tripping device is guaranteed, even if a certain tolerance exists between the armature first arm 112 and the magnetic yoke 9, and/or the assembly position of the armature first arm 112 and the magnetic yoke 9 is poor, namely, a certain error exists between the assembly of the armature first arm 112 and the magnetic yoke 9, the magnetic gap adjusting screw 7 can be used for adjusting the distance between the armature first arm 112 and the magnetic yoke 9, so that the optimal matching of the armature first arm 112 and the magnetic yoke 9 is realized, and the qualification rate of products is improved.
As shown in fig. 1and 5, one embodiment of the electromagnetic trip device of the present invention is shown.
The invention relates to an electromagnetic tripping device, which comprises a temperature sensing connecting plate 1, a magnetic yoke 9, an armature 11, a tripping rod 12, a counter-force spring 6 and an armature bracket 8, wherein one end of the magnetic yoke 9 is connected with the temperature sensing connecting plate 1, the other end of the magnetic yoke is matched with the armature 11, the armature 11 comprises an armature first arm 112 which is in driving fit with the magnetic yoke 9 and an armature second arm 111 which is in driving fit with the tripping rod 12, the tripping rod 12 is in locking fit with a tripping buckle 2 of a circuit breaker, one end of the armature bracket 8 is arranged on the temperature sensing connecting plate 1, the middle part of the armature 11 is pivotally connected with the armature bracket 8, the armature bracket 8 comprises a magnetic gap adjusting screw 7, the magnetic gap adjusting screw 7 is correspondingly arranged with the armature second arm 111, and the distance between the armature first arm 112 and the magnetic yoke 9 can be adjusted by screwing the magnetic gap adjusting screw 7; when short-circuit current flows through the temperature sensing connecting plate 1, the armature first arm 112 is attracted to swing towards the magnetic yoke 9, so that the armature second arm 111 drives the trip rod 12 to release the locking fit with the trip buckle 2, the circuit breaker is opened, and after the short-circuit current is eliminated, the counterforce spring 6 resets the armature 11.
Specifically, as shown in fig. 2, the magnetic yoke 9 has a U-shaped structure, the temperature sensing connection plate 1 passes through the middle part of the magnetic yoke 9 and is connected with the bottom of the U-shaped structure, and the opening end of the U-shaped structure is in driving fit with the armature first arm 112 of the armature 11; the armature bracket 8 is of an L-shaped structure and comprises an armature bracket cross arm 81 and an armature bracket vertical arm 80 which are connected in a bending way, the armature bracket 8 also comprises a magnetic gap adjusting screw 7 which is arranged on the armature bracket vertical arm 80 and is in threaded connection with the armature bracket vertical arm, the armature bracket cross arm 81 is arranged on the upper side of the temperature sensing connecting plate 1 and is connected with the temperature sensing connecting plate, and the middle part of the armature 11 is connected with the armature bracket vertical arm 80 in a pivoting way; the armature 11 is in a V-shaped structure and comprises an armature first arm 112 and an armature second arm 111 which are connected in a bending manner, the armature first arm 112 is positioned above the magnetic yoke 9, and the armature second arm 111 is positioned on one side of the armature bracket vertical arm 80 and is correspondingly arranged with the magnetic gap adjusting screw 7. As shown in fig. 5, the trip bar 12 is disposed above the armature 11, and the middle portion of the trip bar 12 is pivotally disposed, and includes a trip bar driven arm 121 and a trip bar locking arm 122 extending from the middle portion of the trip bar 12, where the trip bar driven arm 121 is located on the side of the armature second arm 111 of the armature 11 and is in driving engagement with the armature second arm 111, and the trip bar locking arm 122 is in locking engagement with the trip 2 of the circuit breaker. As shown in fig. 1, one end of the reaction spring 6 is connected to the armature first arm 112 of the armature 11, and the other end is connected to the link lever driving arm 52 of the link lever 5.
It should be noted that, the cooperation of the trip bar 12 with the latch of the trip buckle 2 of the circuit breaker means that the trip bar 12 is connected with the trip buckle 2 to limit the action of the trip buckle 2, and after the trip bar 12 is separated from the trip buckle 2, the action of the trip buckle 2 is not limited by the trip bar 12.
Preferably, as shown in fig. 2, the armature bracket 8 has an L-shaped structure, which includes an armature bracket cross arm 81, an armature bracket vertical arm 80, a magnetic gap adjusting screw 7, and an armature bracket cantilever 82; the armature bracket cantilevers 82 are connected with the armature bracket vertical arms 80 in a bending way, the two armature bracket cantilevers 82 are respectively arranged at two sides of the armature bracket vertical arms 80, and the magnetic gap adjusting screw 7 is arranged on the armature bracket vertical arms 80. Further, the magnetic gap adjusting screw 7 is arranged in the middle of the vertical arm 80 of the armature bracket and is in threaded connection with the vertical arm; the armature bracket cross arm 81 is connected with the armature bracket vertical arm 80 at right angles.
Preferably, as shown in fig. 3, the armature 11 has a V-shaped structure, and includes an armature first arm 112, an armature second arm 111, an armature connecting arm 113, a first arm slot 1130 and a spring hanging hole 1120, where the armature first arm 112 and the armature second arm 111 are bent and connected, the two armature connecting arms 113 are symmetrically disposed at two sides of one end of the armature first arm 112 connected with the armature second arm 111, two ends of the middle part of the armature first arm 112 are respectively provided with a first arm slot 1130, one side of each first arm slot 1130 is provided with a spring hanging hole 1120, the two first arm slots 1130 are symmetrically disposed, the two spring hanging holes 1120 are symmetrically disposed, and the spring hanging hole 1120 and the armature connecting arm 113 are respectively disposed at two sides of the first arm slot 1130. In the direction shown in fig. 3, two armature connecting arms 113 are symmetrically disposed at two sides of the right end of the first armature arm 112, and the two armature connecting arms 113 are bent towards the upper side of the first armature arm 112, and a spring hanging hole 1120 is disposed at the left side of each first arm slot 1130. Further, the second armature arm 111 further includes a second arm first plate 1111 connected to the first armature arm 112 and a second arm second plate 1110 bent and connected to the second arm first plate 1111, where the second arm second plate 1110 is bent in the direction of the first armature arm 112, and the second arm second plate 1110 is in driving fit with the trip rod receiving arm 121 of the trip rod 12.
Preferably, the first armature arm 112 of the armature 11 is connected to the linkage rod 5 through two symmetrically distributed reaction springs 6, and the lower end of the reaction spring 6 penetrates into the spring hanging hole 1120 from the first arm slot 1130. Further, two reaction springs 6 are arranged in parallel, and the upper end of each reaction spring 6 is connected with a linkage rod driving arm 52 of one linkage rod 5.
Preferably, the armature connecting arm 113 of the armature 11 is pivotally connected to the armature bracket arm 82 of the armature bracket 8 by a first pivot 10.
Preferably, the electromagnetic trip device of the present invention further includes structure for pivotally mounting trip bar 12, which may be a separate element, or may be a pivot, pivot hole, etc. within the circuit breaker housing.
As shown in fig. 1 and 5, the electromagnetic trip device of the present invention further includes a linkage rod 5 and a spring adjusting knob 3, wherein the middle part of the linkage rod 5 is pivotally arranged, the electromagnetic trip device includes a linkage rod driving arm 52 and a linkage rod driven arm 51 extending from the middle part of the linkage rod 5, one end of a reaction spring 6 is connected with an armature first arm 112, the other end is connected with the linkage rod driving arm 52, the spring adjusting knob 3 is in driving connection with the linkage rod driven arm 51, and the spring adjusting knob 3 is screwed, and the linkage rod 5 is driven to rotate by the linkage rod driven arm 51, so that the linkage rod driving arm 52 swings to adjust the tension of the reaction spring 6 to the armature first arm 112.
Preferably, as shown in fig. 1, the electromagnetic trip device of the present invention further includes a knob bracket 4, the knob bracket 4 is disposed above the linkage rod 5, and the spring adjusting knob 3 is rotatably disposed on the knob bracket 4.
Specifically, as shown in fig. 1, the linkage rod 5 is located at one side of the trip rod 12 and above the armature 11, the spring adjusting knob 3 is located above the linkage rod 5, and includes a knob operating end 30 and a knob driving end 31, the knob driving end 31 includes a spiral bottom surface disposed at a lower end thereof, the linkage rod driven arm 51 of the linkage rod 5 includes a spherical protrusion disposed at one end thereof, and the spherical protrusion is in driving connection with the spiral bottom surface.
Preferably, the value of the helix angle alpha of the spiral bottom surface is 30-60 degrees.
It should be noted that, the above-mentioned spring adjusting knob 3 and the linkage rod driven arm 51 are not limited to the above-mentioned mode, but the spring adjusting knob 3 may be connected with the knob bracket 4 by screw, and the lower end of the spring adjusting knob 3 is connected with the linkage rod driven arm 51 by contact, so that the same purpose can be achieved. There are a number of other ways, which are not listed here.
Preferably, as shown in fig. 1, the linkage rod 5 includes two linkage rod driving arms 52 disposed side by side, each linkage rod driving arm 52 is connected to one reaction spring 6, and the armature second arm 111 of the armature 11 is located between the two reaction springs 6 and is in driving engagement with the trip rod driven arm 121 of the trip rod 12.
Preferably, the electromagnetic trip device of the present invention further comprises a structure for pivotally mounting the link lever 5, which may be a separate element, or may be a pivot, a pivot hole, etc. inside the circuit breaker housing.
The knob driving end 31 of the spring adjusting knob 3 comprises a spiral bottom surface, the spiral bottom surface is in driving fit with the spherical bulge of the linkage rod driven arm 51, the knob operating end 30 enables the knob bottom surface to slide relatively with the spherical bulge, the linkage rod driven arm 51 can swing up and down, the linkage rod 5 is enabled to rotate, the linkage rod 5 drives the linkage rod driving arm 52 to swing, and accordingly adjustment of the tension of the counter-force spring 6 to the armature first arm 112 is achieved. Moreover, the spherical protrusion is also beneficial to reducing the friction force between the spherical protrusion and the spiral bottom surface, and is beneficial to the smoother rotation of the spring adjusting knob 3.
It should be noted that the electromagnetic trip device of the present invention can be used for breaking of both single-pole circuit breakers and multipole circuit breakers. When the electromagnetic tripping device is used for breaking a multi-pole circuit breaker, a plurality of electromagnetic tripping devices can be used side by side, and each electromagnetic tripping device is correspondingly arranged with one pole of the circuit breaker. Furthermore, when the electromagnetic tripping device is used for breaking a multipole circuit breaker, a plurality of electromagnetic tripping devices can share the linkage rod 5, the tripping rod 12 and the spring adjusting knob 3, so that the cost and the internal space of the circuit breaker are saved. Specifically, as shown in fig. 1 and 5, taking a four-pole circuit breaker as an example, the electromagnetic trip device corresponding to each pole of the circuit breaker includes a temperature sensing connection plate 1, a magnetic yoke 9, an armature bracket 8, an armature 11 and a reaction spring 6, and the assembly relationship and structure of the above components are unchanged, which is different in that: the linkage rod 5 comprises a linkage rod main body 50, wherein the linkage rod main body 50 is pivoted, one side of the linkage rod main body 50 is provided with a linkage rod driven arm 51 which is in driving fit with the spring adjusting knob 3, and the other side of the linkage rod main body 50 is provided with a plurality of linkage rod driving arms 52 which are respectively connected with a plurality of counter-force springs 6; the trip bar 12 comprises a trip bar main body 120, the trip bar main body 120 is pivoted, one side of the trip bar main body 120 is provided with a trip bar locking arm 122 which is in locking fit with a trip 2 of the circuit breaker, the other side of the trip bar main body is provided with a plurality of trip bar driven arms 121, and each trip bar driven arm 121 is in driving fit with an armature second arm 111 of one armature 11.
The invention also discloses a circuit breaker which comprises the electromagnetic tripping device.
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 (14)
1. An electromagnetic tripping device comprises a temperature sensing connecting plate (1), a magnetic yoke (9), an armature (11), a tripping rod (12) and a counter-force spring (6), wherein one end of the magnetic yoke (9) is connected with the temperature sensing connecting plate (1), the other end of the magnetic yoke is matched with the armature (11), the middle part of the armature (11) is pivoted and arranged, the electromagnetic tripping device comprises an armature first arm (112) in driving fit with the magnetic yoke (9) and an armature second arm (111) in driving fit with the tripping rod (12), and the tripping rod (12) is in locking fit with a tripping buckle (2) of a circuit breaker; when short-circuit current flows in the temperature sensing connecting plate (1), the armature first arm (112) is attracted to swing towards the magnetic yoke (9), so that the armature second arm (111) drives the tripping rod (12) to be in locking fit with the trip button (2) to enable the breaker to be separated, and the counter-force spring (6) is used for resetting the armature (11);
The method is characterized in that: the armature (11) is of a V-shaped structure and further comprises armature connecting arms (113), wherein the armature first arms (112) and the armature second arms (111) are bent and connected, the two armature connecting arms (113) are symmetrically arranged on two sides of one end, connected with the armature first arms (112) and the armature second arms (111), of each armature connecting arm (113), and the two armature connecting arms (113) are bent towards the upper side of the armature first arms (112) and are located between the armature first arms (112) and the armature second arms (111); still include armature support (8), armature support (8) one end sets up on temperature sensing connecting plate (1), and armature (11) are connected with armature support (8) pivot through armature linking arm (113), and armature support (8) include magnetic gap adjusting screw (7), and magnetic gap adjusting screw (7) set up and drive with armature second arm (111) and link to each other correspondingly, revolve and twist the distance between magnetic gap adjusting screw (7) can adjust armature first arm (112) and yoke (9).
2. The electromagnetic trip device according to claim 1, wherein: the armature bracket (8) is of an L-shaped structure and comprises an armature bracket cross arm (81) and an armature bracket vertical arm (80) which are connected in a bending way, the armature bracket cross arm (81) is connected with the temperature sensing connecting plate (1), and the magnetic gap adjusting screw (7) is arranged on the armature bracket vertical arm (80) and is in threaded connection with the armature bracket vertical arm; the armature (11) is of a V-shaped structure, the middle of the armature (11) is pivotally connected with the armature bracket vertical arm (80), the armature second arm (111) is arranged opposite to the armature bracket vertical arm (80), and the armature first arm (112) is arranged opposite to the armature bracket cross arm (81).
3. The electromagnetic trip device according to claim 2, wherein: the armature bracket (8) further comprises armature bracket cantilevers (82) which are connected with the armature bracket vertical arms (80) in a bending way, and the two armature bracket cantilevers (82) are respectively arranged at two sides of the armature bracket vertical arms (80); the armature (11) further comprises an armature connecting arm (113) arranged in the middle of the armature connecting arm, the armature connecting arm (113) is connected with the armature first arm (112) in a bending mode, the two armature connecting arms (113) are respectively arranged on two sides of one end, connected with the armature second arm (111) of the armature first arm (112), of the armature connecting arm (113), and the armature connecting arm (113) is connected with the armature bracket cantilever (82) in a pivoting mode through the first pivot (10).
4. The electromagnetic trip device according to claim 1, wherein: the device also comprises a linkage rod (5) and a spring adjusting knob (3); the middle part of the linkage rod (5) is pivoted, the linkage rod comprises a linkage rod driving arm (52) and a linkage rod driven arm (51), the linkage rod driving arm (52) extends out of the middle part of the linkage rod (5), one end of the reaction spring (6) is connected with the armature first arm (112), and the other end of the reaction spring is connected with the linkage rod driving arm (52); the spring adjusting knob (3) is in driving connection with the linkage rod driven arm (51), the spring adjusting knob (3) is screwed, the linkage rod (5) is driven to rotate through the linkage rod driven arm (51), and the linkage rod driving arm (52) swings to adjust the tension of the counter-force spring (6) to the armature first arm (112).
5. The electromagnetic trip device according to claim 4, wherein: the spring adjusting knob (3) comprises a knob operating end (30) and a knob driving end (31), and the knob driving end (31) comprises a spiral bottom surface arranged at the lower end of the knob driving end; the linkage rod driven arm (51) comprises a spherical protrusion (510) arranged at one end of the linkage rod driven arm, and the spherical protrusion (510) is in driving connection with the spiral bottom surface.
6. The electromagnetic trip device according to claim 4, wherein: the device also comprises a knob bracket (4), and the spring adjusting knob (3) is rotatably arranged on the knob bracket (4).
7. The electromagnetic trip device according to claim 4, wherein: the armature first arm (112) is connected with the linkage rod (5) through two symmetrically distributed counter-force springs (6).
8. The electromagnetic trip device according to claim 7, wherein: the first arm (112) of the armature comprises first arm grooves (1130) and spring hanging holes (1120), the two first arm grooves (1130) are respectively formed in two ends of the middle of the first arm (112) of the armature, one spring hanging hole (1120) is formed in one side of each first arm groove (1130), the two first arm grooves (1130) are symmetrically formed, the two spring hanging holes (1120) are symmetrically formed, and armature connecting arms (113) of the armature (11) and the spring hanging holes (1120) are respectively located on two sides of the first arm grooves (1130).
9. The electromagnetic trip device according to claim 1, wherein: the armature (11) further comprises first arm grooves (1130) and spring hanging holes (1120), two ends of the middle of the armature first arm (112) are respectively provided with a first arm groove (1130), one side of each first arm groove (1130) is provided with one spring hanging hole (1120), the two first arm grooves (1130) are symmetrically arranged, the two spring hanging holes (1120) are symmetrically arranged, and the spring hanging holes (1120) and the armature connecting arms (113) are respectively located on two sides of each first arm groove (1130).
10. The electromagnetic trip device according to claim 9, wherein: the armature second arm (111) further comprises a second arm first plate (1111) connected with the armature first arm (112) and a second arm second plate (1110) connected with the second arm first plate (1111) in a bending mode, the second arm second plate (1110) is bent towards the direction of the armature first arm (112), and the second arm second plate (1110) is in driving fit with the trip rod (12).
11. The electromagnetic trip device according to claim 1, wherein: the middle part of the trip bar (12) is pivoted, and comprises a trip bar driven arm (121) in driving fit with the armature second arm (111) and a trip bar locking arm (122) in locking fit with the trip buckle (2).
12. The electromagnetic trip device according to claim 1, wherein: the magnetic yoke (9) is of a U-shaped structure, the temperature sensing connecting plate (1) is connected with the bottom of the U-shaped structure, and the opening end of the U-shaped structure is in driving fit with the first armature arm (112).
13. The electromagnetic trip device according to claim 1, wherein: the magnetic yoke (9) is of a U-shaped structure, the temperature sensing connecting plate (1) penetrates through the middle of the magnetic yoke (9) and is connected with the bottom of the U-shaped structure, an armature bracket cross arm (81) of the armature bracket (8) is arranged on the upper side of the temperature sensing connecting plate (1), an armature bracket vertical arm (80) of the armature bracket (8) is positioned on one side of the magnetic yoke (9), an armature (11) is arranged above the magnetic yoke (9) and is pivotally connected with the armature bracket vertical arm (80), a trip rod (12) is arranged above the armature (11), a trip rod driven arm (121) of the trip rod (12) is in driving fit with an armature second arm (111), and a trip rod locking arm (122) of the trip rod (12) is in locking fit with the trip buckle (2); still including setting up in gangbar (5) of trip bar (12) one side and being located armature (11) top and setting up spring adjust knob (3) in gangbar (5) top, gangbar (5) middle part pivot sets up, and armature first arm (112) link to each other with gangbar actuating arm (52) of gangbar (5) through two symmetrically distributed counter-force springs (6), and armature second arm (111) are located between two counter-force springs (6) and are driven the cooperation with trip bar driven arm (121), and gangbar driven arm (51) and spring adjust knob (3) drive of gangbar (5) link to each other.
14. A circuit breaker, characterized in that it comprises an electromagnetic trip device according to any one of claims 1-13.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811536034.7A CN109449064B (en) | 2018-12-15 | 2018-12-15 | Electromagnetic trip device and circuit breaker |
| PCT/CN2019/115894 WO2020119336A1 (en) | 2018-12-15 | 2019-11-06 | Electromagnetic tripping device and circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811536034.7A CN109449064B (en) | 2018-12-15 | 2018-12-15 | Electromagnetic trip device and circuit breaker |
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| Publication Number | Publication Date |
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| CN109449064A CN109449064A (en) | 2019-03-08 |
| CN109449064B true CN109449064B (en) | 2024-05-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201811536034.7A Active CN109449064B (en) | 2018-12-15 | 2018-12-15 | Electromagnetic trip device and circuit breaker |
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| CN (1) | CN109449064B (en) |
| WO (1) | WO2020119336A1 (en) |
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| CN109449064B (en) * | 2018-12-15 | 2024-05-14 | 浙江正泰电器股份有限公司 | Electromagnetic trip device and circuit breaker |
| CN113948349B (en) * | 2021-10-28 | 2023-12-12 | 武汉船用电力推进装置研究所（中国船舶重工集团公司第七一二研究所） | Piezoelectric tripping mechanism for circuit breaker |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN109449064A (en) | 2019-03-08 |
| WO2020119336A1 (en) | 2020-06-18 |
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