CN116844919B - Electromagnetic relay capable of being rapidly broken - Google Patents
Electromagnetic relay capable of being rapidly broken Download PDFInfo
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- CN116844919B CN116844919B CN202311122998.8A CN202311122998A CN116844919B CN 116844919 B CN116844919 B CN 116844919B CN 202311122998 A CN202311122998 A CN 202311122998A CN 116844919 B CN116844919 B CN 116844919B
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- open contact
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- 235000014676 Phragmites communis Nutrition 0.000 claims abstract description 22
- 230000000712 assembly Effects 0.000 claims abstract description 13
- 238000000429 assembly Methods 0.000 claims abstract description 13
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 68
- 238000009434 installation Methods 0.000 claims description 20
- 230000009471 action Effects 0.000 claims description 12
- 238000001179 sorption measurement Methods 0.000 claims description 5
- 238000000034 method Methods 0.000 claims description 4
- 238000006243 chemical reaction Methods 0.000 abstract description 2
- 230000003068 static effect Effects 0.000 description 5
- 230000000903 blocking effect Effects 0.000 description 4
- 230000005484 gravity Effects 0.000 description 3
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- 238000010586 diagram Methods 0.000 description 2
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H50/00—Details of electromagnetic relays
- H01H50/54—Contact arrangements
- H01H50/56—Contact spring sets
- H01H50/58—Driving arrangements structurally associated therewith; Mounting of driving arrangements on armature
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H50/00—Details of electromagnetic relays
- H01H50/14—Terminal arrangements
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H50/00—Details of electromagnetic relays
- H01H50/64—Driving arrangements between movable part of magnetic circuit and contact
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/20—Interlocking, locking, or latching mechanisms
- H01H9/24—Interlocking, locking, or latching mechanisms for interlocking two or more parts of the mechanism for operating contacts
Abstract
The invention belongs to the technical field of electromagnetic relays, and provides a rapid breaking electromagnetic relay which comprises a lower shell, an upper shell and a connecting body, wherein a first electromagnetic driving device is arranged in the lower shell, a movable reed and a plurality of groups of current-carrying contact assemblies are arranged in the upper shell, each group of current-carrying contact assemblies is connected with a load to form an independent circuit loop, each group of current-carrying contact assemblies comprises a normally open contact piece and a common contact, and the first electromagnetic driving device drives the movable reed to move through a first push rod so that the common contact piece is contacted with the normally open contact piece; the normally open contact piece is provided with a tripping component and a locking component, when the normally open contact piece flows current exceeding a specified value, the tripping component drives the normally open contact piece to be disconnected with the common contact, and the normally open contact in the normally open contact piece is locked and fixed by the locking component; the invention has the advantages of flexible control, high safety and rapid reaction.
Description
Technical Field
The invention belongs to the technical field of electromagnetic relays, and particularly relates to a rapid breaking electromagnetic relay.
Background
An electromagnetic relay is an electronic control device having a control system (also known as an input loop) and a controlled system (also known as an output loop), and is commonly used in an automatic control circuit, which is actually an "automatic switch" for controlling high voltage and high current by switching on and off a low voltage and low current circuit.
In general, a simple electromagnetic relay consists of a coil assembly, a movable armature, and one or more sets of contacts, i.e., single throw systems, double throw systems, etc. These contact sets include movable contacts, fixed normally open contacts, and fixed normally closed contacts. The armature is mechanically connected to one or more sets of moving contacts and held in place by springs.
In the prior art, the safety of the circuit is protected by providing a fuse in the circuit. Specifically, when the dynamic and static contacts of the high-voltage direct current relay pass through large current, electric repulsive force can be generated, at the moment, the upper magnetic conduction block and the lower magnetic conduction block generate attractive force to counteract the electric repulsive force, the dynamic and static contacts are ensured not to spring open, reaction time is strived for a fuse of a loop, and the loop current is cut off by virtue of fuse fusing, so that a protection effect is achieved.
In order to avoid additionally arranging a fuse in the circuit loop and ensure that the electromagnetic relay can be rapidly broken, the electromagnetic relay which relies on the moving and static contacts to realize automatic rapid breaking of the moving and static contacts through excessive current is arranged:
for example, chinese patent application publication No. CN115692107a discloses a high-voltage dc relay with rapid response breaking, in which a second magnetic conductive block is fixed on a push rod, when a fixed contact contacts a movable reed and a large current passes through, a magnetic attraction force in the same direction as an electric repulsive force between the fixed contact and the movable reed is generated between the first magnetic conductive block and the second magnetic conductive block, so as to accelerate the spring-open of the movable contact and block the current rising; the high-voltage direct-current relay capable of rapidly responding to breaking does not need to be additionally provided with a fuse, and is low in cost; meanwhile, fault points are reduced, and the safety is improved; the technical scheme adopted by the invention has simple structure, high response speed and higher practical value;
as another example, chinese patent application publication No. CN105493220a discloses an electromagnetic relay, which includes an electromagnet device having a first fixed member, a movable member, and a first exciting coil, a contact device having a movable contact and a fixed contact, and a trip device; the tripping device is provided with a second exciting coil; the electromagnet device moves the movable piece from the first position to the second position; when the second exciting coil of the tripping device flows a current of a prescribed value or more, the tripping device moves the movable member to the third position by the second magnetic flux generated by the second exciting coil. When the movable member is located at the first position and the third position, the electromagnetic relay is in an open state; when the movable member is located at the second position, the electromagnetic relay is in a closed state; thereby effecting movement of the movable member from the second position in the closed condition to the third position in the open condition by provision of the trip device to open the circuit;
although the electromagnetic relay in the prior art can realize quick circuit breaking when a large current flows according to the moving and static contacts, once the circuit is broken, the loop controlled by the electromagnetic relay breaks the end, and the electromagnetic relay is not suitable for the situation that one electromagnetic relay controls a plurality of loops through a plurality of groups of contacts, once the current increases due to the fault of one loop, the whole electromagnetic relay is completely broken, and other loops cannot work normally, so that the work of the whole circuit is affected.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides the electromagnetic relay which is rapidly disconnected, solves the problems in the background art, and only cuts off one circuit loop when the current of one circuit loop in a plurality of circuit loops controlled by the electromagnetic relay is increased due to faults, so that other circuit loops keep working normally.
The technical scheme of the invention is as follows:
the electromagnetic relay comprises a lower shell, an upper shell and a connecting body, wherein a first electromagnetic driving device is arranged in the lower shell, a movable reed and a plurality of groups of current-carrying contact assemblies are arranged in the upper shell, each group of current-carrying contact assemblies are connected with a load to form an independent circuit loop, each group of current-carrying contact assemblies comprises a normally open contact piece detachably arranged on the upper shell and a public contact arranged on the movable reed, and the first electromagnetic driving device drives the movable reed to move through a first push rod so as to enable the public contact piece and the normally open contact piece;
the normally open contact piece includes the wiring piece of detachably mounting on last casing, sets up normally open contact on the wiring piece, sets up tripping operation subassembly and locking subassembly in the wiring piece, under normal condition, normally open contact part is outstanding the wiring piece, when normally open contact flows has the electric current more than the prescribed value, tripping operation subassembly drive normally open contact accomodates back wiring piece to locked by locking subassembly is fixed.
Further, the wiring piece is provided with a first installation cavity, the tripping assembly is installed in the first installation cavity, the tripping assembly comprises a second electromagnetic driving device, the second electromagnetic driving device comprises a second fixed iron core, a second exciting coil and a second moving piece, the second exciting coil is wound on the periphery of the second fixed iron core, the normally open contact is installed on the second moving piece, one wiring end of the second exciting coil is connected to the normally open contact, the other wiring end of the second exciting coil is fixed on the wiring piece, and when the second exciting coil flows current exceeding a specified value, electromagnetic force generated by the second fixed iron core drives the second moving piece to drive the normally open contact to move upwards.
Preferably, the second fixed iron core is located at the upper side of the second moving member, a second elastic spring is arranged between the second fixed iron core and the second moving member, under the action of the elastic force of the second elastic spring, the normally open contact part protrudes out of the wiring member, and when the second exciting coil flows with current exceeding a specified value, the electromagnetic adsorption force of the second fixed iron core to the second moving member is larger than the elastic force of the second elastic spring, so that the second moving member is driven to drive the normally open contact to move upwards.
Optionally, the second fixed iron core is located the downside of second moving part, the second moving part is the permanent magnet, the second moving part pass through the second push rod with normally open contact is connected, when second exciting coil lets in the electric current, the polarity of the opposite end of second moving part and second fixed iron core is the same, when second exciting coil flows has the electric current more than the prescribed value, the second fixed iron core promotes the second moving part and upwards moves.
Further, two wiring ends of the second excitation coil are electrically connected with conducting strips, one conducting strip is in abutting connection with the normally open contact, and the other conducting strip is located in a wiring groove at the top of the wiring piece.
Further, the locking assembly comprises a third elastic spring, a push plate and a baffle rod, the baffle rod is fixed on one side face of the push plate, one end of the third elastic spring is abutted against the other side face of the push plate, and under the elastic action of the third elastic spring, the end part of the baffle rod is abutted against the side face of the normally open contact.
Further, the lower extreme of wiring spare is provided with detachable end cover, be provided with the second installation cavity in the end cover, locking assembly installs in the second installation cavity, the other end of third elastic spring is contradicted on the left side wall of second installation cavity, the middle part of end cover has been seted up and has been supplied normally open contact passes the through-hole, the tip of shelves pole is followed the right side wall of second installation cavity penetrates in the through-hole.
Further, the locking assembly further comprises a traction piece, one end of the traction piece is fixed on the push plate, and the other end of the traction piece penetrates out of the side wall of the upper shell.
Further, the first electromagnetic driving device comprises a first fixed iron core, a first exciting coil and a first moving part, wherein the first exciting coil is wound on the periphery of the first fixed iron core, the first moving part is fixed at one end of the first push rod, the movable reed is fixed at the other end of the first push rod, and when current flows in the first exciting coil, the magnetic force generated by the first fixed iron core drives the first moving part to drive the movable reed to move upwards.
Preferably, the first fixed iron core is located at the lower side of the first moving member, the first moving member is a permanent magnet, when the first exciting coil is energized with current, polarities of opposite ends of the first fixed iron core and the first moving member are the same, and the first fixed iron core pushes the first moving member to move upwards.
Compared with the prior art, the invention has the following beneficial effects:
1. the electromagnetic relay provided by the invention can independently control a plurality of circuit loops controlled by the electromagnetic relay, and the tripping component is respectively and independently arranged for the wiring piece of each circuit loop, so that when any one of the circuit loops controlled by the electromagnetic relay passes through excessive current, the circuit loop can be rapidly and independently disconnected without affecting the normal operation of other circuit loops controlled by the electromagnetic relay, thereby realizing flexible control of the circuit loops controlled by the same relay;
2. according to the invention, the locking components are respectively arranged on each wiring piece, and after the normally open contact of a certain circuit loop is stored in the wiring piece due to overlarge current, the normally open contact is locked and fixed through the locking components, so that the tripping component is prevented from losing the driving force to the normally open contact, and the normally open contact is prevented from contacting with the corresponding public contact again, and the safety of the circuit loop is effectively improved;
in a word, the invention has the advantages of flexible control, high safety and rapid reaction.
Drawings
Fig. 1 is a schematic structural view of an electromagnetic relay provided in embodiment 1;
fig. 2 is a schematic diagram of the structure of the normally open contact provided in embodiment 1;
FIG. 3 is an enlarged schematic view of a portion of FIG. 2A;
FIG. 4 is an enlarged schematic view of a portion of FIG. 2B;
fig. 5 is a schematic view of the structure of the normally open contact provided in embodiment 2;
fig. 6 is a schematic structural diagram of a first electromagnetic driving device according to embodiment 3.
In the figure: 1. the device comprises a lower shell, 2, an upper shell, 3, a connecting body, 4, a movable reed, 5, a normally open contact piece, 501, a wiring piece, 502, a normally open contact, 503, a tripping component, 5031, a second fixed iron core, 5032, a second exciting coil, 5033, a second moving piece, 5034, a second elastic spring, 5035, a second push rod, 504, a locking component, 5041, a third elastic spring, 5042, a push plate, 5043, a baffle rod, 5044, a traction piece, 505, an end cover, 506, a side cover, 6, a normally closed contact, 7, a public contact, 8, a first fixed iron core, 9, a first exciting coil, 10, a first moving piece, 11, a conducting strip, 12, a wiring groove, 13, a mounting rack, 14 and a first elastic spring.
Description of the embodiments
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments.
Examples
As shown in fig. 1, an electromagnetic relay capable of being rapidly broken comprises a lower shell 1, an upper shell 2 and a connecting body 3, wherein the connecting body 3 is fixed on the lower shell 1, the upper shell 2 is fixed on the connecting body 3, a mounting bracket 13 is arranged at the lower part of the inner side wall of the upper shell 2, a first electromagnetic driving device is arranged in the lower shell 1, a movable reed 4 and a plurality of groups of current-carrying contact assemblies are arranged in the upper shell 2, each group of current-carrying contact assemblies forms an independent circuit loop after being connected with a load, each group of current-carrying contact assemblies comprises a normally-open contact 5 detachably mounted on the upper shell 2, a normally-closed contact 6 mounted on the mounting bracket 13 and a common contact 7 arranged on the movable reed 4, and the first electromagnetic driving device drives the movable reed 4 to move through a first push rod so that the common contact 7 is contacted with the normally-open contact 5 or the normally-closed contact 6; the normally open contact 5 is located right above the normally closed contact 6, the common contact 7 is located between the normally open contact 5 and the normally closed contact 6, and the common contact 7 is in contact with the normally closed contact 6 under the condition that the first electromagnetic driving device is not electrified;
as shown in fig. 2, the normally open contact 5 includes a wire connecting piece 501 detachably mounted on the upper housing 2, a normally open contact 502 provided on the wire connecting piece 501, a trip assembly 503 provided in the wire connecting piece 501, and a locking assembly 504, wherein in a normal state, the normally open contact 502 partially protrudes out of the wire connecting piece 501, and when the normally open contact 502 flows a current exceeding a prescribed value or more, the trip assembly 503 drives the normally open contact 502 to be received back into the wire connecting piece 501 and locked and fixed by the locking assembly 504;
the wiring piece 501 is in threaded connection with the upper shell 2, the wiring piece 501 is partially positioned outside the upper shell 2, partially positioned inside the upper shell 2, and a wiring groove 12 is formed in the wiring piece 501 positioned outside the upper shell 2, and the wiring groove 12 is used for connecting a wiring terminal of a load; the wire connecting piece 501, the movable spring 4 and the mounting frame 13 are all made of insulating materials, for example, the wire connecting piece 501 is made of ceramic or hard plastic, or other hard insulating materials; the normally open contact 502, the normally closed contact 6 and the common contact 7 are all made of conductive materials.
As shown in fig. 2, a first installation cavity is provided at a portion of the wiring member 501 located inside the upper case 2, the trip assembly 503 is installed in the first installation cavity, the trip assembly 503 includes a second electromagnetic driving device, the second electromagnetic driving device includes a second fixed iron core 5031, a second exciting coil 5032 wound around the outer periphery of the second fixed iron core 5031, and a second moving member 5033, the normally open contact 502 is installed on the second moving member 5033, one terminal of the second exciting coil 5032 is connected to the normally open contact 502, the other terminal of the second exciting coil 5032 is fixed on the wiring member 501, and when a current exceeding a specified value flows in the second exciting coil 5032, the electromagnetic force generated by the second fixed iron core 5031 drives the second moving member 5033 to drive the normally open contact 502 to move upwards, so that the normally open contact 502 is no longer in contact with the common contact 7, and the corresponding circuit is disconnected.
As shown in fig. 2, the second fixed iron core 5031 is located on the upper side of the second moving member 5033, a second elastic spring 5034 is disposed between the second fixed iron core 5031 and the second moving member 5033, two ends of the second elastic spring 5034 respectively abut against the second fixed iron core 5031 and the second moving member 5033, under the elastic action of the second elastic spring 5034, the normally open contact 502 partially protrudes out of the wire connecting member 501, and when the second exciting coil 5032 flows a current exceeding a specified value, the electromagnetic adsorption force generated by the second fixed iron core 5031 on the second moving member 5033 is greater than the elastic force of the second elastic spring 5034, so as to drive the second moving member 5033 to drive the normally open contact 502 to move upwards;
in this embodiment, the second moving member 5033 is a second movable iron core, a mounting hole is formed in the middle of the lower end of the second moving member 5033, the normally open contact 502 is in threaded connection with the mounting hole, and an insulating layer (not illustrated in the figure) is disposed on the inner side wall of the mounting hole, so as to avoid that the normally open contact 502 is electrified to cause the second moving member 5033 to be electrified;
in this embodiment, the connection slot 12 of the connection piece 501 is communicated with the first installation cavity through a first threading hole, the second fixed iron core 5031 is provided with a second threading hole, one end of the second exciting coil 5032 enters the connection slot 12 from the first threading hole, and the other end of the second exciting coil 5032 penetrates the second threading hole and then penetrates the second moving piece 5033 to be connected to the normally open contact 502;
in this embodiment, a protruding edge portion is provided at the lower end of the second moving member 5033, the second elastic spring 5034 abuts against the protruding edge portion, a slot is provided at the lower end of the second fixed iron core 5031, and when a current exceeding a specified value flows in the second exciting coil 5032, the electromagnetic force generated by the second fixed iron core 5031 adsorbs the second moving member 5033 to drive the normally open contact 502 to move upwards, so that the upper end of the second moving member 5033 is inserted into the slot; it will be appreciated that the second displacement member 5033 is displaced upwardly a distance sufficient to ensure that the lower end of the normally open contact 502 is received into the terminal member 501.
As shown in fig. 2 and 3, two terminals of the second exciting coil 5032 are electrically connected with conductive pieces 11, one of the conductive pieces 11 is in contact connection with the normally open contact 502, and the other conductive piece 11 is located in the wiring slot 12 at the top of the wiring piece 501; specifically, the conductive piece 11 is an elastic conductive piece with a arched middle part, the conductive piece 11 abutting against the normally open contact 502 is located in the mounting hole, and in the process of connecting the normally open contact 502 into the mounting hole in a threaded manner, the contact between the normally open contact 502 and the conductive piece 11 is tighter along with the continuous entering of the normally open contact 502, so that a good conductive effect is ensured.
As shown in fig. 4, the locking assembly 504 includes a third elastic spring 5041, a push plate 5042, and a lever 5043, where the lever 5043 is fixed on one side of the push plate 5042, one end of the third elastic spring 5041 abuts against the other side of the push plate 5042, and under the elastic force of the third elastic spring 5041, the end of the lever 5043 abuts against the side of the normally open contact 502; when the second exciting coil 5032 flows a current exceeding a specified value, the second fixed iron core 5031 adsorbs the second moving member 5033 to drive the normally open contact 502 to move upwards beyond the horizontal position where the blocking rod 5043 is located, and then the blocking rod 5043 moves rightwards under the elastic force of the third elastic spring 5041, so that the blocking rod 5043 is located at the lower side of the normally open contact 502, and after the normally open contact 502 is disconnected from the common contact 7 and loses the current, the normally open contact 502 is driven to restore to the position continuously contacted with the common contact 7 under the elastic force of the third elastic spring 5041.
As shown in fig. 2 and fig. 4, a detachable end cover 505 is provided at the lower end of the wire connecting piece 501, the end cover 505 may be fixed by using a screw thread or a screw, a second installation cavity is provided in the end cover 505, the locking component 504 is installed in the second installation cavity, the other end of the third elastic spring 5041 abuts against the left side wall of the second installation cavity, a through hole through which the normally open contact 502 passes is provided in the middle of the end cover 505, and the end of the blocking rod 5043 passes through the through hole from the right side wall of the second installation cavity;
specifically, the left side of the second installation cavity has an opening, the position of the opening is provided with a side cover 506 fixed by a screw, the left end of the third elastic spring 5041 is abutted against the side cover 506, when the end of the lever 5043 is abutted against the normally open contact 502, the push plate 5042 is spaced from the right side surface of the second installation cavity by a distance sufficient to ensure that when the normally open contact 502 moves upwards beyond the horizontal position where the lever 5043 is located, the end of the lever 5043 moves to the center position of the normally open contact 502, and it can be understood that the push plate 5042 is abutted against the right side surface of the second installation cavity at this time.
As shown in fig. 2 and 4, the locking assembly 504 further includes a traction member 5044, one end of the traction member 5044 is fixed on the push plate 5042, and the other end of the traction member 5044 passes out from the side wall of the upper housing 2; the traction piece 5044 is a pull rope, after a certain circuit loop is tripped, after maintenance work is finished, the push plate 5042 can be pulled to move leftwards by pulling the traction piece 5044 until the end part of the baffle rod 5043 moves to the left side of the normally open contact 502, so that the baffle rod 5043 does not stop the normally open contact 502 any more, and the normally open contact 502 is restored to be in contact with the common contact 7 under the action of the elastic force of the second elastic spring 5034.
As shown in fig. 1, the first electromagnetic driving device includes a first fixed iron core 8, a first exciting coil 9 wound around the outer periphery of the first fixed iron core 8, and a first moving member 10, where the first moving member 10 is fixed at one end of the first push rod, and the movable reed 4 is fixed at the other end of the first push rod, and when a current flows in the first exciting coil 9, the magnetic force generated by the first fixed iron core 8 drives the first moving member 10 to drive the movable reed 4 to move upwards;
in this embodiment, the first fixed iron core 8 is located on the upper side of the first moving member 10, the first moving member 10 is a moving iron core, a through hole is formed in the middle of the first fixed iron core 8, a first push rod is inserted into the through hole, a first elastic spring 14 is sleeved on the periphery of the first push rod, one end of the first elastic spring 14 abuts against the upper side surface of the first moving member 10, the other end of the first elastic spring 14 abuts against the top of the lower casing 1, under the condition that the first exciting coil 9 is not electrified, the first moving member 10 is located on the lowest side under the elastic action of the first elastic spring 14, at this time, the common contact 7 abuts against the normally closed contact 6, after the first exciting coil 9 is electrified, the first fixed iron core 8 generates a magnetic adsorption force on the first moving member 10, the magnetic adsorption force overcomes the elastic force of the first elastic spring 14, so that the first moving member 10 moves upwards, and when the first moving member 10 moves to contact with the first fixed iron core 8, the common contact 7 abuts against the normally open contact 502.
Examples
The present embodiment is another embodiment according to embodiment 1, and the difference between the two is that the relative positions of the second fixed iron core 5031 and the second movable member 5033 in the second electromagnetic driving device are different.
As shown in fig. 5, the second fixed iron core 5031 is located at the lower side of the second moving member 5033, the second moving member 5033 is a permanent magnet, the second moving member 5033 is connected with the normally open contact 502 through a second push rod 5035, a mounting hole is formed at the lower end of the second push rod 5035, the normally open contact 502 is in threaded connection in the mounting hole, under the condition that the normally open contact 502 is not in contact with the common contact 7 (i.e., the second exciting coil 5032 does not pass through current), under the action of gravity of the second moving member 5033 and the action of attraction of the second exciting coil 5033 to the second fixed iron core 5031, the second moving member 5033 is abutted against the upper end of the second fixed iron core 5031, when the second exciting coil 5032 is electrified, the polarity of the opposite end of the second moving member 5033 is the same as that of the second fixed iron core 5031, under the normal working condition of a circuit loop, the second exciting coil 5032 passes through stable load working current, when the normal working condition of the circuit loop occurs, the current value of the second exciting coil 5032 is not in continuous, the second exciting coil 5032 is electrified to move upwards, and the second repulsive force is greater than the second exciting coil 5033, and the second moving member 5033 moves upwards, and the normally open contact 5033 moves upwards, under the condition that the second exciting coil 5033 is electrified by the second exciting coil 5033;
in this embodiment, the second push rod 5035 is made of a non-conductive material, and in order to increase the weight of the second moving member 5033, the second push rod 5035 and the normally open contact 502, a heavy material may be added into the second push rod 5035 to increase the weight of the second push rod 5035.
Examples
The present embodiment is another embodiment according to embodiment 1, and the difference between them is that the relative positions of the first stator core 8 and the first mover 10 are different.
As shown in fig. 6, the first fixed iron core 8 is located at the lower side of the first moving member 10, the first moving member 10 is a permanent magnet, when no current is introduced into the first exciting coil 9, under the action of gravity of the first moving member 10, the first moving member 10 is abutted against the first fixed iron core 8, when the current is introduced into the first exciting coil 9, the polarities of the opposite ends of the first fixed iron core 8 and the first moving member 10 are the same, and the repulsive force between the first fixed iron core 8 and the first moving member 10 is greater than the sum of the gravities of the first moving member 10 and the first push rod, so that the first fixed iron core 8 pushes the first moving member 10 to move upwards, the common contact 7 is in contact with the normally open contact 502, the circuit loop of the load is communicated, and the second exciting coil 5032 is charged with the working current of the load.
The working process of the invention is as follows:
the electromagnetic relay provided by the invention is connected to a circuit loop of a load, and each group of current-carrying contact assemblies of the electromagnetic relay are respectively connected with one load; a first exciting coil 9 in a first electromagnetic driving device in the electromagnetic relay is connected into a control loop;
the first exciting coil 9 is electrified, the first fixed iron core 8 magnetizes and drives the first movable piece 10 to drive the movable reed 4 to move upwards, so that the public contact 7 on the movable reed 4 is abutted against the normally open contact 502 to switch on a circuit loop of a load, the load starts to work, the second exciting coil 5032 is electrified, although the second fixed iron core 5031 is magnetized at the moment, the interaction force between the second fixed iron core 5031 and the second movable piece 5033 is insufficient to drive the second movable piece 5033 to move, when the circuit loop of a certain load fails, the current in the circuit loop of the load is increased, the magnetic flux of the second exciting coil 5032 is increased, the interaction force between the second fixed iron core 5031 and the second movable piece 5033 is increased, when the current in the circuit loop of the load is increased to a certain prescribed value, the second fixed iron core 5031 drives the second movable piece 5033 to move upwards, the normally open contact 502 moves upwards along a through hole in the middle of the end cover, the normally open contact 502 is disconnected with the public contact 7 in the process of the upward movement of the second movable piece 5033, the circuit loop is disconnected, the second exciting coil 5032 does not flow through the current, the normally open contact 502 continues to move to the normally open contact 502 to the side of the end cover 5033 under the action of the first fixed iron core 5031, and the normally open contact 5043 moves to the normally open contact 5033 under the action of the condition that the normally open contact is continuously moves to the normally open at the second fixed contact 5033, and the normally moves to the normally open contact 5043 under the condition to the normal force is not under the normal state, and the normal force is continuously under the normal force of the normal state, and the normal force is moved under the normal state, and the normal force is not under the normal state, and the normal state; when the maintenance of the load circuit loop is completed, the traction piece 5044 corresponding to the load circuit loop is pulled, the stop lever 5043 is restored to the original position and does not stop the normally open contact 502, and the normally open contact 502 moves downwards to collide with the common contact 7 again so as to conduct the circuit loop of the load.
The foregoing is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art, who is within the scope of the present invention, should make equivalent substitutions or modifications according to the technical scheme of the present invention and the inventive concept thereof, and should be covered by the scope of the present invention.
Claims (10)
1. The electromagnetic relay comprises a lower shell (1), an upper shell (2) and a connecting body (3), wherein a first electromagnetic driving device is arranged in the lower shell (1), a movable reed (4) and a plurality of groups of current-carrying contact assemblies are arranged in the upper shell (2), each group of current-carrying contact assemblies is connected with a load to form an independent circuit loop, each group of current-carrying contact assemblies comprises a normally open contact (5) detachably arranged on the upper shell (2) and a common contact (7) arranged on the movable reed (4), and the first electromagnetic driving device drives the movable reed (4) to move through a first push rod so that the common contact (7) is contacted with the normally open contact (5);
the method is characterized in that:
the normally open contact (5) comprises a wiring piece (501) detachably arranged on the upper shell (2), a normally open contact (502) arranged on the wiring piece (501), a tripping component (503) and a locking component (504) arranged in the wiring piece (501), wherein in a normal state, the normally open contact (502) partially protrudes out of the wiring piece (501), and when the normally open contact (502) flows with current exceeding a specified value, the tripping component (503) drives the normally open contact (502) to be stored in the wiring piece (501) and is locked and fixed by the locking component (504);
the tripping assembly (503) comprises a second electromagnetic driving device, the second electromagnetic driving device comprises a second fixed iron core (5031), a second exciting coil (5032) and a second moving part (5033), the second exciting coil (5032) is wound around the periphery of the second fixed iron core (5031), the normally open contact (502) is installed on the second moving part (5033), one wiring end of the second exciting coil (5032) is connected to the normally open contact (502), the other wiring end of the second exciting coil (5032) is fixed to the wiring part (501), and when current exceeding a specified value flows through the second exciting coil (5032), electromagnetic force generated by the second fixed iron core (5031) drives the second moving part (5033) to drive the normally open contact (502) to move upwards.
2. The electromagnetic relay of claim 1, wherein: the wire connector (501) is provided with a first mounting cavity, and the tripping assembly (503) is mounted in the first mounting cavity.
3. The electromagnetic relay of claim 2, wherein the electromagnetic relay is configured to: the second fixed iron core (5031) is located on the upper side of the second moving part (5033), a second elastic spring (5034) is arranged between the second fixed iron core (5031) and the second moving part (5033), under the elastic action of the second elastic spring (5034), the normally open contact (502) partially protrudes out of the wiring part (501), and when the second exciting coil (5032) flows with current exceeding a specified value, the electromagnetic adsorption force to the second moving part (5033) generated by the second fixed iron core (5031) is larger than the elastic force of the second elastic spring (5034) so as to drive the second moving part (5033) to drive the normally open contact (502) to move upwards.
4. The electromagnetic relay of claim 2, wherein the electromagnetic relay is configured to: the second fixed iron core (5031) is located at the lower side of the second movable element (5033), the second movable element (5033) is a permanent magnet, the second movable element (5033) is connected with the normally open contact (502) through a second push rod (5035), when current is introduced into the second exciting coil (5032), the polarity of the opposite ends of the second movable element (5033) and the polarity of the opposite ends of the second fixed iron core (5031) are the same, and when the current exceeding a specified value flows into the second exciting coil (5032), the second fixed iron core (5031) pushes the second movable element (5033) to move upwards.
5. The electromagnetic relay of claim 2, wherein the electromagnetic relay is configured to: two wiring terminals of the second exciting coil (5032) are electrically connected with conducting strips (11), one conducting strip (11) is in abutting connection with the normally open contact (502), and the other conducting strip (11) is located in a wiring groove (12) at the top of the wiring piece (501).
6. The electromagnetic relay of claim 1, wherein: the locking assembly (504) comprises a third elastic spring (5041), a push plate (5042) and a baffle rod (5043), wherein the baffle rod (5043) is fixed on one side surface of the push plate (5042), one end of the third elastic spring (5041) is abutted to the other side surface of the push plate (5042), and under the elastic action of the third elastic spring (5041), the end part of the baffle rod (5043) is abutted to the side surface of the normally open contact (502).
7. The electromagnetic relay of claim 6 wherein: the lower extreme of wiring piece (501) is provided with detachable end cover (505), be provided with the second installation cavity in end cover (505), locking subassembly (504) are installed in the second installation cavity, the other end of third elastic spring (5041) is contradicted on the left side wall of second installation cavity, the through-hole that supplies normally open contact (502) passed is seted up at the middle part of end cover (505), the tip of shelves pole (5043) is followed the right side wall of second installation cavity penetrates in the through-hole.
8. The electromagnetic relay of claim 6 wherein: the locking assembly (504) further comprises a traction piece (5044), one end of the traction piece (5044) is fixed on the push plate (5042), and the other end of the traction piece (5044) penetrates out of the side wall of the upper shell (2).
9. The electromagnetic relay of claim 1, wherein: the first electromagnetic driving device comprises a first fixed iron core (8), a first exciting coil (9) and a first moving part (10), wherein the first exciting coil (9) is wound on the periphery of the first fixed iron core (8), the first moving part (10) is fixed at one end of the first push rod, the movable reed (4) is fixed at the other end of the first push rod, and when current flows in the first exciting coil (9), the magnetic force generated by the first fixed iron core (8) drives the first moving part (10) to drive the movable reed (4) to move upwards.
10. The fast breaking electromagnetic relay of claim 9, wherein: the first fixed iron core (8) is located at the lower side of the first moving part (10), the first moving part (10) is a permanent magnet, when the first exciting coil (9) is electrified, the polarities of the opposite ends of the first fixed iron core (8) and the first moving part (10) are the same, and the first fixed iron core (8) pushes the first moving part (10) to move upwards.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202311122998.8A CN116844919B (en) | 2023-09-01 | 2023-09-01 | Electromagnetic relay capable of being rapidly broken |
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|---|---|---|---|
| CN202311122998.8A CN116844919B (en) | 2023-09-01 | 2023-09-01 | Electromagnetic relay capable of being rapidly broken |
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| CN116844919A CN116844919A (en) | 2023-10-03 |
| CN116844919B true CN116844919B (en) | 2024-01-16 |
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| CN116844919A (en) | 2023-10-03 |
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