WO2021258894A1 - 动触点结构及接触器 - Google Patents

动触点结构及接触器 Download PDF

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Publication number
WO2021258894A1
WO2021258894A1 PCT/CN2021/093419 CN2021093419W WO2021258894A1 WO 2021258894 A1 WO2021258894 A1 WO 2021258894A1 CN 2021093419 W CN2021093419 W CN 2021093419W WO 2021258894 A1 WO2021258894 A1 WO 2021258894A1
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WO
WIPO (PCT)
Prior art keywords
movable contact
yoke
bottom plate
piece
frame
Prior art date
Application number
PCT/CN2021/093419
Other languages
English (en)
French (fr)
Inventor
顾春鹏
董洪江
季燕
黄广明
陈太贤
赵福高
Original Assignee
华为数字能源技术有限公司
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Publication date
Application filed by 华为数字能源技术有限公司 filed Critical 华为数字能源技术有限公司
Publication of WO2021258894A1 publication Critical patent/WO2021258894A1/zh

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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
    • 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

Definitions

  • This application relates to the technical field of power equipment, in particular to a movable contact structure and a contactor.
  • the high-voltage DC contactor is an important power distribution control device in the DC charging circuit of electric vehicles. As the capacity of the vehicle battery increases, the charging current in the DC charging circuit becomes larger and larger, which also imposes requirements on the safety level of the DC charging circuit. taller and taller.
  • PIN1 and PIN2 there are two terminals at the power connection port of the electric vehicle: PIN1 and PIN2; PIN1 can be the positive terminal, PIN2 can be the negative terminal, and the PIN1 terminal can pass through a DC contactor Connect to the Power Distribution Unit (PDU) in the electric vehicle.
  • PDU Power Distribution Unit
  • the PIN2 terminal can be connected to the power distribution box in the electric vehicle through another DC contactor.
  • the power distribution box is then connected to the negative and negative poles of the high-voltage battery pack. connect.
  • the connection between the DC fast charging device and the high-voltage battery pack is controlled by controlling the closing or opening of the dynamic and static contacts of the DC contactor.
  • the embodiments of the present application provide a movable contact structure and a contactor.
  • a short-circuit current occurs in a DC charging circuit
  • the movable contact and the static contact can be kept closed, thereby preventing the DC contactor from bursting and damage.
  • the first aspect of the embodiments of the present application provides a movable contact structure, including: a carrier, a push rod, and at least one set of movable contact components; the push rod is arranged on one side of the carrier, and the movable contact
  • the point assembly is arranged on the other side of the carrying frame;
  • the movable contact assembly includes a fixing frame fixed on the carrying frame, a spring arranged between the carrying frame and the fixing frame, and a first A yoke, a movable contact piece and a second yoke; one end of the spring is connected to the carrier, the other end of the spring is connected to the first yoke, and the movable contact piece is arranged on the first yoke.
  • the second yoke On the yoke; the second yoke is fixed on the fixing frame and is arranged opposite to the first yoke.
  • electromagnetic attraction When a short-circuit current occurs in DC, electromagnetic attraction is generated between the first yoke and the second yoke.
  • the electromagnetic attraction can compensate for the elastic force of the spring and offset the repulsive force between the movable contact and the static contact to make the movable contact And the static contact is kept closed, which can prevent the DC contactor from bursting and breaking.
  • the surface of the carrier facing the spring is provided with a first boss or a first groove for socketing the spring; and the first yoke faces the spring.
  • the surface of the spring is provided with a second boss or a second groove for socketing the spring, so that the spring is firmly connected between the first yoke and the supporting frame, and prevents the spring from falling out of the way.
  • the separation between the first yoke and the supporting frame ensures the reliability of the electrical connection between the moving and static contacts of the contactor.
  • the surface of the first yoke facing the moving contact piece is provided with a positioning boss; the surface of the moving contact piece facing the first yoke is provided with a The positioning groove is matched with the positioning boss; the movable contact piece is installed on the positioning boss of the first yoke through its positioning groove, which can enhance the connection between the movable contact piece and the first yoke stability.
  • the first yoke includes a first bottom plate and two first ears located on both sides of the first bottom plate, and the two first ears It encloses a U-shaped space with the first bottom plate; both sides of the movable contact piece are respectively provided with recesses, the movable contact piece is located in the U-shaped space, and the two first ear pieces are respectively engaged In the corresponding recessed portion; that is, the first yoke is clamped in the recessed portion of the moving contact piece through its first lug, which can further enhance the connection between the first yoke and the moving contact piece stability.
  • the positioning boss is located on the first bottom plate, that is, the movable contact piece can be mounted to the positioning boss of the first yoke through its positioning groove At the same time, the first yoke is clamped in the recessed portion of the movable contact piece through its first lug, which can further improve the connection stability of the first yoke and the movable contact piece.
  • a first process hole is provided at the connection between the first ear piece and the first bottom plate, and the first process hole is located in the middle of the first ear piece Part; the embodiment of the present application is provided with a first process hole at the connection between the first ear and the first bottom plate, which can reduce the structural strength of the connection between the first ear and the first bottom plate, It is convenient to bend to form the first ear piece on the first bottom plate.
  • the fixing frame includes a second bottom plate, and two second ear pieces located on both sides of the second bottom plate, and the two second ear pieces are connected to each other.
  • the second bottom plate encloses a U-shaped bracket; the second yoke is fixed on the second bottom plate, and the ends of the two second lugs away from the second bottom plate are respectively fixed on the supporting frame; That is, the fixing frame is a U-shaped bracket, which is not only used to fix the second yoke, but also the spring, the first yoke and the movable contact piece can be arranged between the fixing frames , Capable of guiding the first yoke and the movable contact piece.
  • the carrier frame is provided with a first limiting protrusion and two second limiting protrusions for fixing each of the second ear pieces, and the two The second limiting protrusions are respectively arranged symmetrically on both sides of the first limiting protrusion; the end of the second ear piece facing the carrying frame is provided with a first limiting protrusion that cooperates with the first limiting protrusion.
  • the second ear piece is clamped on the first positioning protrusion through the first positioning hole; two second limiting protrusions are respectively connected to two sides of the second ear piece Butt; that is, the fixing frame and the carrying frame are fixed together in a snap-fit manner, which facilitates the disassembly and installation of the fixing frame.
  • the two second lugs are respectively provided with a second process hole on a side facing the second bottom plate, and the second process hole is along the second lug.
  • the length of the sheet extends; the end of the second process hole close to the second bottom plate can extend to the second bottom plate; in the embodiment of the present application, the connection point between the second ear piece and the second bottom plate
  • the second process hole is provided, which can reduce the structural strength of the connection between the second ear piece and the second bottom plate, and facilitate bending to form the second ear piece on the second bottom plate.
  • the surface of the second yoke facing the second bottom plate is provided with a first connecting column
  • the second bottom plate is provided with a first connecting column that cooperates with the first connecting column.
  • the first mounting hole; the second yoke is fixed on the second bottom plate through the first connecting column; that is, the second yoke is inserted through the first connecting column and fixed to the fixing frame
  • the connection efficiency between the second yoke and the fixing frame can be improved.
  • the carrier frame is provided with a reinforcing structure, and the reinforcing structure is located on a side of the carrier frame facing away from the moving contact assembly, that is, the carrier frame faces away from the movable contact assembly.
  • a reinforcing structure is provided on one side of the movable contact assembly, which is used to improve the structural strength of the carrier frame to prevent the carrier frame from deforming.
  • the carrying frame is a support made of insulating material
  • the carrying frame has a hollow structure
  • the reinforcing structure is a metal pin buried in the carrying frame
  • the supporting frame is strengthened by embedding its metal needles to enhance its structural strength, and it is also convenient to make the supporting frame and the reinforcing structure integrally; at the same time, the supporting frame is made of insulating material, which can make the movable contact structure and The low-voltage electromagnetic system on one side of the carrying frame is kept insulated.
  • the carrier frame is provided with two groups of the moving contact assemblies, the two groups of moving contact assemblies are bilaterally symmetrical with respect to the push rod;
  • the moving contact pieces in the point assembly are arranged in parallel and opposite each other, and each of the moving contact pieces is provided with two moving contacts; it can be connected to the low-voltage electromagnetic system through a single push rod to realize the positive line and the negative electrode in the DC charging circuit
  • the circuit is turned on and off at the same time, which simplifies the structure of the contactor and saves the production cost.
  • the carrier frame is provided with two arc partitions opposite to each other, one of the arc partitions is located at one end of the movable contact piece, and the other arc partition is located at The other end of the moving contact piece; each of the arc separating portions is respectively arranged opposite to the moving contact located at the same end of the two moving contact pieces; the embodiment of the present application is arranged between two adjacent moving contact assemblies There is an arc isolation part to avoid crosstalk of arcs generated by the contact between the movable contact in each movable contact assembly and the corresponding static contact, thereby improving the operation safety of the DC charging circuit.
  • the second aspect of the embodiments of the present application provides a contactor, including a housing, a magnetic pole plate, a low-voltage electromagnetic system, and the movable contact structure of the first aspect; the housing is connected to the magnetic pole plate to form a extinguisher Arc cavity, the low-voltage electromagnetic system is located on the side of the magnetic pole plate away from the housing; the movable contact structure is arranged in the arc extinguishing cavity, and the push rod in the movable contact structure passes through The magnetic pole plate is connected to the low-voltage electromagnetic system.
  • a shell is arranged on the outside of the movable contact structure, which can prevent the arc generated inside the shell from spreading to the outside of the DC contactor, thereby preventing arc interference and affecting the operation safety of the DC charging circuit.
  • a metal connecting piece is provided at one end of the housing close to the magnetic pole plate, and the housing is connected to the magnetic pole plate through the metal connecting piece; And when the magnetic pole plate deforms due to thermal expansion, the metal connecting piece can absorb part of the deformation, so as to prevent the shell and the magnetic pole plate from being damaged due to expansion and deformation.
  • the housing further includes an arc partition plate, and the arc partition plate is arranged opposite to the arc partition on the carrier; the arc partition is provided with a plug Slot, the end of the arc partition plate facing the supporting frame is located in the insertion slot.
  • the arc partition plate is inserted into the insertion groove of the arc partition, and an isolation structure can be formed between the two movable contact components, and two independent chambers are formed in the arc extinguishing cavity of the shell and the two movable
  • the contact components can be respectively located in the two chambers to avoid crosstalk, collision, and accumulation of the arcs generated in each chamber, and further improve the operation safety of the DC charging circuit.
  • the housing is provided with a static contact, and the static contact and the moving contact on the moving contact piece are arranged directly opposite to each other to lift the moving contact and the moving contact.
  • the electrical connection reliability between the static contacts is provided with a static contact, and the static contact and the moving contact on the moving contact piece are arranged directly opposite to each other to lift the moving contact and the moving contact.
  • the low-voltage electromagnetic system includes an electromagnetic coil, a moving iron core, a static iron core, and a return spring arranged between the moving iron core and the static iron core;
  • the static iron core is fixed on the magnetic pole plate, the moving iron core is located on the side of the static iron core away from the magnetic pole plate, and the return spring is located between the static iron core and the moving iron core
  • One end of the push rod passes through the magnetic pole plate, the static iron core, and the return spring, and the push rod is connected to the movable iron core; that is, the low-voltage electromagnetic system in the embodiment of the present application passes through a single push
  • the rod drives the movement of multiple sets of movable contact components located on the carrying frame, and can realize simultaneous conduction and disconnection of the positive line and the negative line in the DC charging circuit, simplify the structure of the contactor, and save the production cost.
  • Figure 1 is a schematic diagram of a DC charging circuit of an electric vehicle and a DC fast charging device in the related art
  • Figure 2 is a cross-sectional view of a contactor provided by an embodiment of the application.
  • Fig. 3 is an overall schematic diagram of a movable contact structure provided by an embodiment of the application.
  • Fig. 4 is a front view of a movable contact structure provided by an embodiment of the application.
  • FIG. 5 is an exploded schematic diagram of a movable contact structure provided by an embodiment of the application.
  • Fig. 6 is a first schematic diagram of the connection between the carrying frame and the push rod according to an embodiment of the application
  • FIG. 7 is a second schematic diagram of the connection between the carrying frame and the push rod according to an embodiment of the application.
  • Fig. 8 is a first structural diagram of a first yoke provided by an embodiment of the application.
  • Fig. 9 is a second structural diagram of the first yoke provided by the embodiment of the application.
  • FIG. 10 is a schematic diagram of the structure of a moving contact sheet provided by an embodiment of the application.
  • FIG. 11 is a schematic diagram of the connection between the movable contact piece and the first yoke and the second yoke provided by the embodiment of the application;
  • FIG. 12 is a schematic structural diagram of a second yoke provided by an embodiment of the application.
  • FIG. 13 is a schematic diagram of the connection between the fixing frame, the second yoke, and the carrying frame according to an embodiment of the application;
  • FIG. 14 is a schematic structural diagram of a fixing frame provided by an embodiment of the application.
  • 15 is a schematic diagram of the connection between the fixing frame and the carrying frame provided by an embodiment of the application.
  • FIG. 16 is a schematic diagram of the arrangement of the first limiting protrusion and the second limiting protrusion on the carrier according to the embodiment of the application.
  • the DC contactor is used for electrical connection, such as the connection of an electric car with a DC fast charging device, or the connection of other electrical cabinets with other electrical equipment.
  • the following uses an electric vehicle and a DC fast charging device as an example to illustrate the application of a DC contactor, as shown in FIG. 1, which shows a schematic diagram of a DC charging circuit of an electric vehicle and a DC fast charging device in the related art.
  • the electric vehicle is equipped with a Power Distribution Unit (PDU) and a high-voltage battery pack connected to the PDU.
  • the port of the electric vehicle has two terminals: PIN1 and PIN2.
  • PIN1 is the positive terminal and PIN2 is the negative terminal.
  • the PIN1 terminal is connected to the PDU through a DC contactor
  • the PDU is connected to the positive pole of the high-voltage battery pack
  • the PIN2 terminal is connected to the PDU through a DC contactor
  • the PDU is connected to the negative pole of the high-voltage battery pack; Control the switching and disconnection of the DC contactor to control the electrical connection between the DC fast charging device and the high-voltage battery pack.
  • the embodiments of the present application provide a movable contact structure and a contactor, which are respectively provided with a first yoke and a second yoke on both sides of the movable contact piece, and the first yoke carries the movable contact piece ,
  • a spring is arranged between the first yoke and the bearing frame to keep the movable contact on the moving contact piece in contact with the static contact;
  • the second yoke is fixed on the bearing frame by the fixing frame, and the second yoke and the first yoke
  • a yoke is arranged oppositely.
  • FIG. 2 is a cross-sectional view of the contactor provided by the embodiment of the application; as shown in Figure 2, the contactor provided by the embodiment of the application may be a DC contactor.
  • the DC contactor includes a movable contact structure, a magnetic pole plate 90, and a magnetic pole plate.
  • the housing 82 on both sides of the 90 and the low-voltage electromagnetic system.
  • the movable contact structure includes a carrier 10, push rods 20 on both sides of the carrier 10, at least one set of movable contact assemblies 200, the carrier 10 is installed on the magnetic pole plate 90, and is located on the magnetic pole plate 90 away from the low-voltage electromagnetic
  • the push rod 20 passes through the magnetic pole plate 90 and is connected to the low-voltage electromagnetic system.
  • the magnetic force generated by the low-voltage electromagnetic system can make the push rod 20 move along its axial direction, that is, the push rod 20 drives the carrier 10 relative to the magnetic pole plate. 90 moves.
  • the housing 82 is arranged on the outside of the moving contact assembly 200, the end of the housing 82 facing the magnetic pole plate 90 is fixed on the magnetic pole plate 90, the housing 82 is provided with a static contact 81 at a position opposite to the moving contact assembly 200, and The static contact 81 is located at an end of the housing 82 away from the magnetic pole plate 90; the static contact 81 can be arranged directly opposite to the movable contact in the movable contact assembly 200.
  • the movable contact contacts the static contact 81; at this time, the DC charging circuit is turned on, and correspondingly, the electrical properties of the DC fast charging device and the high-voltage battery pack Connected, the electric car is in a charging state.
  • the movable contact structure includes at least one set of movable contact assemblies 200.
  • two movable contact assemblies 200 are provided in the movable contact structure as an example to describe the embodiments of the present application.
  • the application example illustrates that the moving direction of the movable contact structure can be defined as the up and down direction, that is, the moving direction of the push rod 20 in the movable contact structure; the two movable contact assemblies 200 are respectively located on the left and right sides of the push rod 20, and
  • the two moving contact assemblies 200 can be symmetrically distributed about the push rod 20; that is, the present application can be connected to the low-voltage electromagnetic system through a single push rod 20, and can realize the simultaneous conduction and disconnection of the positive line and the negative line in the DC charging circuit , Simplify the structure of the contactor and save the production cost.
  • the housing 82 can be made of ceramic material.
  • the housing 82 includes a bottom wall and side walls surrounding the bottom wall.
  • the bottom wall and the side walls enclose a rectangular housing 82; the side walls are away from the bottom wall.
  • One end is fixed on the magnetic pole plate 90 to form an arc extinguishing cavity, and a plurality of static contacts 81 are provided on the bottom wall.
  • the two movable contact assemblies 200 are both arranged in the arc extinguishing cavity, and the movable contact in the movable contact assembly 200 and the static contact 81 are arranged directly opposite.
  • each movable contact assembly 200 includes a movable contact board, each movable contact board is provided with two movable contacts, and the two movable contacts are respectively located at two ends of the movable contact board; correspondingly, the bottom plate is provided with Four static contacts 81, one static contact 81 and one moving contact are arranged directly opposite each other.
  • a ceramic housing 82 is arranged outside the moving contact assembly 200 to prevent the inside of the housing 82 from being generated The arc spreads to the outside of the DC contactor to prevent arc interference and affect the safety of the DC charging circuit.
  • one end of the housing 82 facing the magnetic pole plate 90 is provided with a metal connecting piece 84, the metal connecting piece 84 has a ring structure, and the metal connecting piece 84 has an L-shaped cross section along its axial direction.
  • the metal connecting piece 84 includes a first mounting edge and a second mounting edge, and the first mounting edge is perpendicular to the second mounting edge.
  • the first mounting edge can be fixed on the end surface of the side wall or the inner surface of the side wall, and the second mounting edge is attached and fixed on the surface of the magnetic pole plate 90 facing the housing 82; that is, the housing 82 is connected by a metal connecting piece 84 It is fixed on the magnetic pole plate 90.
  • a metal connecting piece 84 is provided between the housing 82 and the magnetic pole plate 90. Because the metal connecting piece 84 is malleable, when the housing 82 and the magnetic pole plate 90 deform due to thermal expansion, the metal connecting piece 84 can absorb part of the deformation, avoiding damage to the housing 82 and the magnetic pole plate 90 due to expansion and deformation.
  • the low-voltage electromagnetic system is located under the magnetic pole plate 90.
  • the low-voltage electromagnetic system provides driving force and restoring force for the push rod 20.
  • the push rod 20 drives the carrier 10 to move up and down in the housing 82 to ensure the movable contact assembly 200
  • the moving contact and the static contact 81 in are closed or opened.
  • a low-voltage electromagnetic system includes an electromagnetic coil 130, a moving iron core 110, a static iron core 100, and a return spring 140 arranged between the moving iron core 110 and the static iron core 100; among them, the moving iron core 110 and the static iron core 100 are arranged Inside the positioning sleeve 120, the positioning sleeve 120 is in the shape of a "single-shaped", which includes a cylinder body with one end closed and an annular mounting edge at the other end of the cylinder body.
  • the static iron core 100 and the movable iron core 110 are arranged in the cylinder body.
  • the static iron core 100 is arranged close to the ring-shaped mounting edge, and the moving iron core 110 is located below the static iron core 100; the ring-shaped mounting edge is fixed on the side surface of the magnetic pole plate 90 away from the carrier 10, and the ring-shaped mounting edge can be fixed by welding On the pole plate 90. Furthermore, the static iron core 100 can also be fixed on the magnetic pole plate 90, and the end surface of the static iron core 100 away from the movable iron core 110 can be flush with the side surface of the magnetic pole plate 90 facing the carrier 10.
  • a return spring 140 is provided between the moving iron core 110 and the static iron core 100.
  • the return spring 140 is made of a non-magnetic material.
  • the return spring 140 is installed between the moving iron core 110 and the static iron core 100 in a natural state.
  • the end of the push rod 20 away from the carrier 10 can pass through the magnetic pole plate 90, the static iron core 100, and the return spring 140 sequentially from top to bottom, and is connected to the movable iron core 110; the electromagnetic coil 130 is sleeved on the outside of the positioning sleeve 120,
  • the moving iron core 110 and the static iron core 100 can be provided with a magnetic field.
  • the low-voltage electromagnetic system also includes a control board 131 that controls the operation of the electromagnetic coil 130 and a lead 132 connected to the control board 131; when the electromagnetic coil 130 is in the power-on state, the static iron core 100 and the magnetic field generated by the electromagnetic coil 130 Electromagnetic attraction is generated between the movable iron core 110, and the movable iron core 110 overcomes the elastic force of the return spring 140 under the action of the electromagnetic attraction, and drives the push rod 20 to move upward, so that the movable contact and the static contact in the movable contact assembly 200 Point 81 contact. Conversely, when the solenoid 130 is in the power-off state, the moving iron core 110 drives the push rod 20 to move downward under the action of the restoring force of the return spring 140 to disconnect the moving contact from the static contact 81.
  • FIG. 3 is an overall schematic diagram of the moving contact structure provided by an embodiment of this application
  • FIG. 4 is a front view of the moving contact structure provided by an embodiment of this application
  • FIG. 5 is an exploded schematic view of the moving contact structure provided by an embodiment of this application .
  • the movable contact structure provided by the embodiment of the present application includes the carrier 10, the push rod 20, and the movable contact assembly 200.
  • One side of the carrier 10 and the push rod 20 are away from the movable iron.
  • One end of the core 110 is connected, and the other side of the carrier 10 is provided with two groups of movable contact assemblies 200, and the two groups of movable contact assemblies 200 can be symmetrically arranged on the carrier 10.
  • the movable contact assembly 200 not only includes a movable contact piece 50 and a movable contact 51 arranged on the movable contact piece 50, but also includes a fixed frame 70, a spring 30, a first yoke 40 and a second yoke 60; wherein, the fixed frame 70
  • An installation space is formed between the supporting frame 10 and the spring 30, the first yoke 40, the movable contact piece 50, and the second yoke 60 can be arranged in the installation space in sequence.
  • the second yoke 60 is fixed on the fixed frame 70 away from the supporting frame. One end of the frame 10, and the second yoke 60 is opposite to the first yoke 40.
  • the spring 30 may be a coil spring, the spring 30 is arranged perpendicular to the bearing surface of the bearing frame 10, one end of the spring 30 is connected to the bearing frame 10, and the other end of the spring 30 is connected to the first yoke 40.
  • the first yoke 40 is used to fix the moving contact piece 50, and the first yoke 40 abuts against the middle part of the moving contact piece 50, and two ends of the moving contact piece 50 are respectively provided with a moving contact 51; the second yoke 60 is fixed on the end of the fixing frame 70 away from the carrier 10, and the second yoke 60 is arranged opposite to the first yoke 40; The installation position of 60 relative to the supporting frame 10 remains unchanged, that is, the distance between the supporting frame 10 and the second yoke 60 remains unchanged.
  • An installation space is formed between the fixed frame 70 and the carrier frame 10, and the spring 30 is installed between the first yoke 40 and the carrier frame 10 in a compressed state, so that the movable contact piece 50 is pressed against the first yoke 40 and the second yoke At the same time, the first yoke 40 and the movable contact piece 50 can move up and down in the installation space with the expansion and contraction of the spring 30.
  • the push rod 20 moves upwards and the moving contact 51 contacts the static contact 81, the push rod 20 continues to move upwards, compressing the spring 30, and using the elastic force of the spring 30 to keep the moving contact 51 and the static contact 81 in contact,
  • the electrical connection reliability of the movable contact 51 and the static contact 81 can be improved.
  • the short-circuit current flowing through the movable contact piece 50 can generate a magnetic field.
  • the first yoke 40 and the second yoke 60 generate electromagnetic attraction under the action of this magnetic field, and the first yoke 40 can be adsorbed to the second yoke 60; therefore, the electromagnetic attraction can compensate the elastic force of the spring 30 to prevent the movable contact 51 and the static contact 81 from being disconnected due to the repulsive force generated by the short-circuit current; that is, the electromagnetic attraction and
  • the resultant force formed by the elastic force of the spring 30 is greater than the repulsive force between the moving contact 51 and the static contact 81, which can keep the moving contact 51 and the static contact 81 in a closed state, and further prevent the DC contactor from bursting and damage.
  • the moving contact piece 50 in the embodiment of the present application is sandwiched between the first yoke 40 and the second yoke 50, which ensures the structural integrity of the moving contact piece 50, which is similar to the moving contact piece 50 in the related art.
  • the embodiment of the present application does not need to provide a through hole on the movable contact piece 50, so in the same space, the conductive area of the movable contact piece 50 in the embodiment of the present application is larger, which can improve The current carrying capacity and conduction capacity of the movable contact piece 50 are determined.
  • FIG. 6 is a schematic diagram 1 of the connection between the carrier frame 10 and the push rod 20 provided by an embodiment of the application; as shown in FIG. 6, in some embodiments, the carrier frame 10 provided in this embodiment may be made of insulating materials
  • the bracket can keep the movable contact structure insulated from the low-voltage electromagnetic system on the side of the carrier frame 10.
  • the supporting frame 10 includes a bottom plate and a hollow structure provided on the bottom plate. That is, while maintaining the bearing strength of the supporting frame 10, structures such as lightening holes or lightening grooves can be provided on the bottom plate to reduce the manufacturing cost of the supporting frame 10.
  • a reinforcing structure may be provided on the side of the carrier 10 away from the movable contact assembly 200.
  • the reinforcing structure may be a metal pin 16 provided on the bottom plate, and the metal pin 16 may be connected to the carrier 10 is made in one piece, that is, when the carrier frame 10 is made by the injection molding process, the metal needle 16 can be buried in the carrier frame 10.
  • the carrying frame 10 is provided with a reinforced structure to improve the structural strength of the carrying frame 10, prevent the carrying frame 10 from being deformed during use, and ensure the synchronization of the movement of the movable contact pieces 50 located on both sides of the carrying frame 10 It means that when the moving contact 51 in one group of moving contact assembly 200 is in contact with its corresponding static contact 81, the moving contact 51 in another group of moving contact assembly 200 is also in contact with its corresponding static contact 81 , It can be ensured that the moving contacts 51 in the two moving contact assemblies 200 are closed or disconnected at the same time with their corresponding static contacts 81.
  • FIG. 7 is a second schematic diagram of the connection between the carrier 10 and the push rod 20 according to an embodiment of the application; as shown in FIG. 7 and combined with FIG. 6; in the embodiment of the present application, two sets of movable contact assemblies are symmetrically provided on the carrier 10 200.
  • the carrier 10 and each movable contact assembly 200 are respectively provided with a positioning structure and a clamping structure.
  • the carrier 10 is provided with two first bosses 13, the first boss 13 is located on the side of the bottom plate of the carrier 10 facing the spring 30, and the two first bosses 13 are symmetrically arranged on the bottom plate.
  • the first boss 13 is a circular boss, and the first boss 13 cooperates with the spring 30 so that the spring 30 can be sleeved on the first boss 13 to connect the spring 30 to the carrier 10 vertically.
  • the end of the first boss 13 away from the bottom plate is chamfered to form a guiding surface, so that the spring 30 can be quickly sleeved on the first boss 13.
  • a first groove for fixing the spring 30 may also be provided on the carrier 10, the first groove is a circular ring groove, and the first groove is arranged in cooperation with the spring 30 to make the spring 30 One end is embedded in the first groove.
  • the end of the push rod 20 close to the carrier frame 10 in the embodiment of the present application is fixedly connected to the carrier frame 10.
  • the push rod 20 and the carrier frame 10 can be fixed together by a threaded connection.
  • the end of 20 close to the carrying frame 10 is provided with a connecting external thread
  • the carrying frame 10 is provided with a threaded hole
  • the threaded hole is provided with an internal thread that matches with the external external thread of the push rod 20.
  • the carrier 10 is provided with a mounting hole, and the mounting hole is in interference fit with the push rod 20 so that the push rod 20 is inserted and fixed in the mounting hole of the carrier 10.
  • the push rod 20 and the carrying frame 10 are made of insulating materials, that is, the carrying frame 10 and the push rod 20 can be made into an integral structure by injection molding, so as to enhance the connection strength between the push rod 20 and the carrying frame 10.
  • two arc partitions 11 are provided on the surface of the carrier 10 facing away from the push rod 20, and the two arc partitions 11 are located at both ends of the movable contact piece 50; and each partition The arc 11 is located between the two moving contact pieces 50, and the arc partition 11 at the same end of the two moving contact pieces 50 separates the two moving contacts 51 at this end.
  • the housing 82 is also provided with an arc shield 83, which is located between the two movable contact assemblies 200 to separate the two movable contact assemblies 200;
  • the arc shield 83 may be a rectangular plate ,
  • the arc partition plate 83 is arranged in the middle part of the bottom wall of the housing 82, one end of the arc partition plate 83 is connected to the bottom wall of the housing 82, and the other end can extend vertically toward the magnetic pole plate 90;
  • the movable contact assembly 200 interferes with the movement of the housing 82, and a gap is reserved between the end of the arc shield 83 facing the magnetic pole plate 90 and the carrier 10.
  • the arc partition 11 is provided with an insertion groove 12 that is matched with the arc partition 83, the end of the arc partition 83 facing the carrier 10 can be inserted into the insertion groove 12, and the arc partition 83 faces one end of the insertion groove 12 There is a certain distance from the slot bottom of the insertion slot 12, so that the carrier 10 can move upward in the housing 82 to ensure that the movable contact 51 and the static contact 81 in the movable contact assembly 200 can contact; at the same time, the separation
  • the arc plate 83 and the arc partition 11 can form an isolation structure between the two moving contact assemblies 200 and form two independent chambers in the arc extinguishing cavity of the housing 82.
  • the two moving contact assemblies 200 can be respectively located in two chambers to prevent the arcs generated by the contact between the moving contact 51 in each moving contact assembly 200 and the corresponding static contact 81 from being extinguished. Crosstalk, collision, and accumulation occur in the arc cavity, thereby improving the safety of the DC charging circuit.
  • FIG. 8 is a structural schematic diagram 1 of the first yoke 40 provided by the embodiment of the application. As shown in FIG. In contact with the spring 30, the side of the second yoke 60 away from the carrier 10 is in contact with the movable contact piece 50.
  • the first yoke 40 is made of a magnetically conductive material, and includes a first bottom plate 41 and two first ear pieces 42.
  • the first bottom plate 41 and the second ear piece 42 may be rectangular plates, and the two first ear pieces 42 are located respectively On both sides of the first bottom plate 41, the length direction of the first ear piece 42 is consistent with the length direction of the first bottom plate 41, the first ear piece 42 can be arranged perpendicular to the first bottom plate 41, and the two first ear pieces 42 are respectively connected to The first bottom plate 41 is surrounded by a U-shaped space.
  • the first lug 42 and the first bottom plate 41 may be an integral structure, that is, the plate for making the first yoke 40 is made into an integral structure by using a bending process.
  • a first process hole 43 may be respectively provided at the connection between the first ear piece 42 and the first bottom plate 41.
  • the process hole may be a long strip hole, and the first process hole 43 is located in the middle part of the first ear piece 42.
  • the length direction of the first process hole 43 is consistent with the length direction of the first ear piece 42.
  • first process holes 43 are respectively provided at the joints between the two sides of the first ear piece 42 and the first bottom plate 41, which can reduce the structural strength of the bending part of the first ear piece 42 and the first bottom plate 41 to facilitate folding bend.
  • a second boss 411 is provided on the side of the first bottom plate 41 facing the carrier 10, and the second boss 411 cooperates with the spring 30 to enable the spring 30 to face one end of the first yoke 40 Sleeve on the second boss 411.
  • the structure of the second boss 411 is the same as the structure of the first boss 13.
  • the second boss 411 is a circular boss, and the first boss 13 and the second boss 411 are arranged opposite to each other, so that the spring 30 is vertically connected between the carrier 10 and the first yoke 40.
  • the end of the second boss 411 away from the first bottom plate 41 is chamfered to form a guiding surface, so that the spring 30 can be quickly sleeved to the second boss 411 superior.
  • a second groove for fixing the spring 30 may also be provided on the first bottom plate 41.
  • the second groove is a circular ring groove, and the second groove is arranged in cooperation with the spring 30 to make the spring One end of 30 is embedded in the second groove.
  • one end of the spring 30 is sleeved on the first boss 13 of the carrier 10, and the other end is sleeved on the second boss 411 of the first yoke 40, so that the spring 30 is firmly connected to the first boss 13 Between the first yoke 40 and the supporting frame 10, the spring 30 is prevented from falling out between the first yoke 40 and the supporting frame 10, and the reliability of the electrical connection between the movable contact and the static contact of the contactor is ensured.
  • the first yoke 40 provided by the embodiment of the present application further includes a positioning boss 412, which is located at the first On the surface of the yoke 40 facing the movable contact piece 50, the surface of the movable contact piece 50 facing the first yoke 40 is provided with a positioning groove that cooperates with the positioning boss 412, and the movable contact piece 50 can pass through the positioning groove Embedded on the positioning boss 412 of the first yoke 40 to prevent relative movement between the movable contact piece 50 and the first yoke 40, so as to enhance the reliability of the electrical connection between the movable contact 51 and the stationary contact 81 .
  • the above-mentioned positioning boss 412 can be provided on the first bottom plate 41, and the positioning boss 412 is located in the middle of the first bottom plate 41; correspondingly, the positioning groove is located in the middle part of the movable contact piece 50, that is, the first yoke 40 Abutting against the middle part of the moving contact piece 50 can ensure that the moving contacts 51 at both ends of the moving contact piece 50 receive uniform force, which can further enhance the reliability of the electrical connection between the moving contact 51 and the stationary contact 81.
  • FIG. 10 is a schematic diagram of the structure of the movable contact piece 50 provided by an embodiment of the application
  • FIG. 11 is a schematic diagram of the connection of the movable contact piece 50 with the first yoke 40 and the second yoke 60 provided by the embodiment of the application
  • the movable contact piece 50 provided by the embodiment of the present application is a metal piece, which is a long strip as a whole; along the length direction of the movable contact piece 50, a movable contact 51 is respectively provided at both ends of the movable contact piece 50 ,
  • the movable contact 51 protrudes from the surface of the movable contact piece 50 toward the second yoke 60 to facilitate contact with the stationary contact 81 on the housing 82.
  • the part of the moving contact piece 50 located between the two moving contacts 51 that is, the middle part of the moving contact piece 50 is provided with a recess 52 and the above-mentioned positioning groove 53.
  • the positioning groove 53 is located on the side surface of the moving contact piece 50 facing the first bottom plate 41, and the positioning groove 53 is matched with the positioning boss 412 on the first bottom plate 41; the two sides of the middle part of the moving contact piece 50 are respectively One recess 52 is provided, and each recess 52 is matched with the first lug 42 of the first yoke 40 respectively.
  • the movable contact piece 50 When the movable contact piece 50 is installed on the first yoke 40, the first ear piece 42 is embedded in the recess 52, and at the same time, the positioning boss 412 can be embedded in the positioning groove 53.
  • the movable contact piece 50 is mounted on the first yoke 40 through the positioning groove 53 and the concave portion 52 thereof, which can enhance the connection stability of the movable contact piece 50 and the first yoke 40.
  • FIG. 12 is a schematic structural diagram of the second yoke 60 provided by an embodiment of the application
  • FIG. 13 is a schematic diagram of the connection of the fixing frame 70 with the second yoke 60 and the carrying frame 10 provided by the embodiment of the application.
  • the second yoke 60 provided by the embodiment of the present application is a rectangular plate or a square plate, which is arranged above the moving contact piece 50; the side of the second yoke 60 facing away from the moving contact piece 50 Can be fixed on the fixing frame 70.
  • one side of the second yoke 60 is provided with a first connecting post 61
  • the fixing frame 70 is provided with a first mounting hole that cooperates with the first connecting post 61, that is, the second yoke 60 can be fixed by the first connecting post 61
  • the connection efficiency between the second yoke 60 and the fixing frame 70 can be improved.
  • the fixing frame 70 is mounted on the supporting frame 10 at an end away from the second yoke 60, so that the installation position of the second yoke 60 relative to the supporting frame 10 can be fixed.
  • the side of the second yoke 60 facing the moving contact piece 50 can abut the moving contact piece 50, that is, the moving contact piece 50 can be sandwiched between the first yoke 40 and the second yoke 60 between.
  • the fixing frame 70 provided by an embodiment of the application includes a second bottom plate 71 and two second ears 72, two second ears
  • the pieces 72 are arranged on both sides of the second bottom plate 71 and are arranged perpendicular to the second bottom plate 71.
  • the second bottom plate 71 and the two second ear pieces 72 enclose a U-shaped bracket.
  • the second bottom plate 71 is arranged opposite to the carrying frame 10.
  • the spring 30, the first yoke 40, the partial movable contact piece 50, and the second yoke 60 are all located between the second bottom plate 71 and the carrying frame 10, and can oppose the first yoke.
  • the iron 40 and the movable contact piece 50 are guided.
  • the second bottom plate 71 is used to fix the second yoke 60.
  • the second bottom plate 71 is provided with a first mounting hole 711 that is matched with the first connecting post 61.
  • the side surface of the second yoke 60 facing the second bottom plate 71 can be The surfaces of the two bottom plates 71 are attached to each other.
  • One end of the second lug 72 is connected to the second bottom plate 71, and the other end of the second lug 72 can be fixed on the carrier 10, so that the installation position of the second yoke 60 relative to the carrier 10 remains unchanged.
  • the two second lugs 72 can be bent with the second bottom plate 71 to form an integrated structure.
  • this embodiment is used for making the fixing frame 70 Craft holes are made on the plate.
  • each second ear piece 72 is respectively provided with a second process hole 73
  • the second process hole 73 may be an elongated hole located at one end of the second ear piece 72 close to the second bottom plate 71
  • the second process hole 73 is located in the middle part of the second ear piece 72, and the length direction of the second process hole 73 is consistent with the extension direction of the second ear piece 72.
  • the end of the second process hole 73 close to the second bottom plate 71 can extend to the second bottom plate 71, that is, a second process hole 73 is provided at the connection between the second bottom plate 71 and the second ear piece 72, and the second bottom plate 71 can be lowered.
  • the structural strength of the joint with the second ear piece 72 is convenient for bending the second ear piece 72.
  • the second ear piece 72 and the second bottom plate 71 can also be made separately, and then the second ear piece 72 is fixed on the second bottom plate 71.
  • This embodiment does not limit the molding method of the fixing frame 70.
  • FIG. 15 is a schematic diagram of the connection between the fixing frame 70 and the carrying frame 10 according to an embodiment of the application; as shown in FIG. 10 is provided with a fixing structure for fixing each second ear piece 72; each fixing structure includes a first positioning protrusion 14 and two second positioning protrusions 15, the first positioning protrusions 14 are located in the two second Between the two positioning protrusions 15, the two second positioning protrusions 15 may be symmetrically arranged on both sides of the first positioning protrusion 14.
  • the second ear piece 72 may be a rectangular plate, and an end of the second ear piece 72 away from the second bottom plate 71 is provided with a first positioning hole 722.
  • the first positioning hole 722 is matched with the first positioning protrusion 14 and the two The distance between the two second positioning protrusions 15 matches the width of the second ear piece 72.
  • the second ear piece 72 is clamped on the first positioning protrusion 14 through its first positioning hole 722; at the same time, the two second positioning protrusions 15 can be separately Abutting against both sides of the second ear piece 72, that is, the second ear piece 72 is sandwiched between the two second positioning protrusions 15.
  • the fixing frame 70 and the carrying frame 10 are fixed together in a snap connection manner, which facilitates the disassembly and installation of the fixing frame 70.
  • the fixing structure has a certain elasticity.
  • the above-mentioned first positioning protrusion 14 and the second positioning protrusion 15 can be made of a metal plate with a certain elasticity.
  • FIG. 16 is a schematic diagram of the arrangement of the first positioning protrusion 14 and the second positioning protrusion 15 on the carrier 10 provided by the embodiment of the application.
  • the two fixing structures of the fixing frame 70 are arranged on the same fixing bracket; the bearing frame 10 is provided with a fixing bracket, the fixing bracket may be a metal bracket buried in the bearing frame 10, and both sides of the fixing bracket are provided with convex Due to the first positioning protrusion 14 and the two second positioning protrusions 15 on the edge of the carrier 10, the first positioning protrusion 14 is used to engage with the first positioning hole 722 of the second ear piece 72, and the two second positioning protrusions The positioning protrusion 15 can abut against the side surface of the second ear piece 72 to fix the two second ear pieces 72 on the fixing bracket respectively.
  • a fixing bracket is embedded in the carrier frame 10, and the fixing bracket integrates the fixing structures for fixing the two second lugs 72 into the same bracket, which can enhance the structural strength of the fixing structure and improve the fixing frame.
  • the above-mentioned contactor may also be an AC contactor.
  • the circuit connected to the AC contactor is usually a three-way circuit. Compared with the two-way circuit where the DC contactor is located, the difference is: AC contactor It includes three groups of movable contact assemblies 200 arranged on the carrier 10, and correspondingly, the number of static contacts arranged on the AC contactor also changes accordingly.
  • the carrier 10 can also be provided with an arc partition plate and an arc partition between two adjacent movable contact assemblies 200, so that each movable contact assembly is respectively arranged in an independent cavity formed by the housing;
  • the movable contact assembly of the contactor can be configured with reference to the movable contact assembly 200 of the aforementioned DC contactor, which will not be repeated here.
  • connection should be understood in a broad sense, for example, it may be a fixed connection or Indirect connection through an intermediate medium can be an internal connection between two elements or an interaction relationship between two elements.
  • connection should be understood in a broad sense, for example, it may be a fixed connection or Indirect connection through an intermediate medium can be an internal connection between two elements or an interaction relationship between two elements.

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Abstract

本申请实施例提供了一种动触点结构及接触器，属于电力设备技术领域，其旨在解决当直流充电电路出现短路电流时，直流接触器炸裂而损坏的问题，所述动触点结构在动触片的两侧分别设置有第一轭铁和第二轭铁，第一轭铁承载动触片，并且第一轭铁与承载架之间设置有弹簧，以使动触片上的动触点与静触点保持抵接；第二轭铁通过固定架固定在承载架上，且第二轭铁与第一轭铁相对设置；当直流充电电路中出现短路电流时，在短路电流产生的磁场作用下，第一轭铁和第二轭铁之间产生电磁吸力，电磁吸力可补偿弹簧的弹力，可抵消动、静触点间的斥力，以使动、静触点保持闭合，进而能够避免直流接触器炸裂而破损的现象发生。

Description

动触点结构及接触器
本申请要求于2020年06月24日提交中国专利局、申请号为202010591482.8、申请名称为“动触点结构及接触器”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及电力设备技术领域，特别涉及一种动触点结构及接触器。
背景技术
高压直流接触器是电动汽车的直流充电电路中的重要配电控制器件，随着车载电池的容量的提升，直流充电电路中的充电电流也越大越大，从而对直流充电电路的安全等级要求也越来越高。
如图1所示，在直流充电电路中，电动汽车的接电端口处具有两个接线端：PIN1及PIN2；其中PIN1可以为正极端子，PIN2可以为负极端子，PIN1端子可通过一个直流接触器与电动汽车内的配电盒(Power Distribution Unit,简称为PDU)连接，PIN2端子可通过另一个直流接触器与电动汽车内的配电盒连接，配电盒再与高压电池包的负极和负极连接。电动汽车充电过程中，通过控制直流接触器的动、静触点的闭合或者断开，以控制直流快充装置与高压电池包的连接。
然而，当直流充电电路出现短路电流时，动触点与静触点之间产生斥力而断开，从而导致直流接触器炸裂而损坏。
发明内容
本申请实施例提供了一种动触点结构及接触器，当直流充电电路中出现短路电流时，能够使动触点与静触点保持闭合，从而避免直流接触器炸裂而损坏。
本申请实施例第一方面提供了一种动触点结构，包括：承载架、推杆及至少一组动触点组件；所述推杆设置在所述承载架的一侧，所述动触点组件设置在所述承载架的另一侧；所述动触点组件包括固定在所述承载架上的固定架，以及设置在所述承载架与所述固定架之间的弹簧、第一轭铁、动触片及第二轭铁；所述弹簧的一端与所述承载架连接，所述弹簧的另一端与所述第一轭铁连接，所述动触片设置在所述第一轭铁上；所述第二轭铁固定在所述固定架上，并与所述第一轭铁相对设置。当直流中出现短路电流时，第一轭铁和第二轭铁之间产生电磁吸力，电磁吸力可补偿弹簧的弹力，可抵消动触点和静触点之间的斥力，以使动触点和静触点保持闭合，进而能够避免直流接触器炸裂而破损的现象发生。
在第一方面的一种可能的实现方式中，所述承载架朝向所述弹簧的表面设置有用于套接所述弹簧的第一凸台或者第一凹槽；所述第一轭铁朝向所述弹簧的表面设置有用于套接所述弹簧的第二凸台或者第二凹槽，以使弹簧稳固的连接在所述第一轭铁和 所述承载架之间，防止所述弹簧从所述第一轭铁及所述承载架之间脱出，保证接触器的动、静触点电性连接的可靠性。
在第一方面的一种可能的实现方式中，所述第一轭铁朝向所述动触片的表面设置有定位凸台；所述动触片朝向所述第一轭铁的表面设置有与所述定位凸台配合的定位凹槽；所述动触片通过其定位凹槽安装至所述第一轭铁的定位凸台上，可增强所述动触片与所述第一轭铁连接稳定性。
在第一方面的一种可能的实现方式中，所述第一轭铁包括第一底板以及位于所述第一底板的两侧边缘的两个第一耳片，两个所述第一耳片和所述第一底板围成U型空间；所述动触片的两侧分别设置有凹陷部，所述动触片位于所述U型空间内，两个所述第一耳片分别卡合在对应的所述凹陷部内；即所述第一轭铁通过其第一耳片卡接在所述动触片的凹陷部内，可进一步提升所述第一轭铁与所述动触片的连接稳定性。
在第一方面的一种可能的实现方式中，所述定位凸台位于所述第一底板上，即所述动触片可通过其定位凹槽安装至所述第一轭铁的定位凸台上，同时，所述第一轭铁通过其第一耳片卡接在所述动触片的凹陷部内，可进一步提升所述第一轭铁与所述动触片的连接稳定性。
在第一方面的一种可能的实现方式中，所述第一耳片与所述第一底板的连接处设置有第一工艺孔，所述第一工艺孔位于所述第一耳片的中间部分；本申请实施例通过在所述第一耳片和所述第一底板的连接处设置有第一工艺孔，可降低所述第一耳片与所述第一底板连接处的结构强度，便于进行折弯以在第一底板上形成第一耳片。
在第一方面的一种可能的实现方式中，所述固定架包括第二底板，以及位于所述第二底板的两侧的两个第二耳片，两个所述第二耳片与所述第二底板围成U型支架；所述第二轭铁固定在所述第二底板上，两个所述第二耳片远离所述第二底板的一端分别固定在所述承载架上；即所述固定架为U型支架，其不仅用于固定所述第二轭铁，同时，可将所述弹簧、所述第一轭铁及所述动触片设置在所述固定架之间，能够对所述第一轭铁和所述动触片进行导向。
在第一方面的一种可能的实现方式中，所述承载架设置有用于固定每个所述第二耳片的第一限位凸起和两个第二限位凸起，两个所述第二限位凸起分别对称设置于所述第一限位凸起的两侧；所述第二耳片朝向所述承载架的一端设置有与所述第一限位凸起配合的第一定位孔，所述第二耳片通过所述第一定位孔卡接在所述第一定位凸起上；两个所述第二限位凸起分别与一个所述第二耳片的两侧抵接；即所述固定架与所述承载架以卡接的方式固定在一起，方便对所述固定架进行拆卸及安装。
在第一方面的一种可能的实现方式中，两个所述第二耳片朝向所述第二底板的一侧分别设置有第二工艺孔，所述第二工艺孔沿所述第二耳片的长度方向延伸；所述第二工艺孔靠近所述第二底板的一端可延伸至所述第二底板；本申请实施例通过在所述第二耳片和所述第二底板的连接处设置有第二工艺孔，可降低所述第二耳片与所述第二底板连接处的结构强度，便于进行折弯以在所述第二底板上形成所述第二耳片。
在第一方面的一种可能的实现方式中，所述第二轭铁朝向所述第二底板的表面设置有第一连接柱，所述第二底板设置有与所述第一连接柱配合的第一安装孔；所述第二轭铁通过所述第一连接柱固定在所述第二底板上；即所述第二轭铁通过所述第一连 接柱插接并固定在所述固定架上，可提升所述第二轭铁与所述固定架之间的连接效率。
在第一方面的一种可能的实现方式中，所述承载架设置有加强结构，所述加强结构位于所述承载架背离所述动触点组件的一侧，即所述承载架在其背离动触点组件的一侧设置有加强结构，用于提升所述承载架的结构强度，以防止所述承载架变形。
在第一方面的一种可能的实现方式中，所述承载架为绝缘材质制作的支架，所述承载架具有镂空结构；所述加强结构为埋设在所述承载架内的金属针；即所述承载架通过埋设其的金属针增强其结构强度，也便于将所述承载架与所述加强结构进行一体制作；同时，所述承载架采用绝缘材质制作，可以使所述动触点结构与位于所述承载架一侧的低压电磁系统保持绝缘。
在第一方面的一种可能的实现方式中，所述承载架设置有两组所述动触点组件，两组所述动触点组件关于所述推杆左右对称；两个所述动触点组件中的动触片平行且相对设置，每个所述动触片上设置有两个动触点；可通过单个推杆与低压电磁系统连接，即可实现直流充电电路中的正极线路及负极线路同时导通及断开，简化接触器的结构，节约制作成本。
在第一方面的一种可能的实现方式中，所述承载架相对设置有两个隔弧部，其中一个所述隔弧部位于所述动触片的一端，另一个所述隔弧部位于所述动触片的另一端；每个所述隔弧部分别与位于两个所述动触片同一端的动触点相对设置；本申请实施例在相邻两个动触点组件之间设置有隔弧部，以避免每个动触点组件中的动触点与对应的静触点接触而产生的电弧相互串扰，从而提升直流充电电路运行安全。
本申请实施例的第二方面提供了一种接触器，包括壳体、磁极板、低压电磁系统以及第一方面所述的动触点结构；所述壳体连接在所述磁极板上形成灭弧腔，所述低压电磁系统位于所述磁极板远离所述壳体的一侧；所述动触点结构设置在所述灭弧腔内，且所述动触点结构中的推杆穿过所述磁极板与所述低压电磁系统连接。本实施例在动触点结构外侧设置有壳体，可防止壳体内部产生的电弧扩散至直流接触器的外部，从而防止电弧干扰及影响直流充电电路的运行安全。
在第二方面的一种可能的实现方式中，所述壳体靠近所述磁极板的一端设置有金属连接片，所述壳体通过所述金属连接片与所述磁极板连接；当壳体及磁极板因受热膨胀而发生变形时，金属连接片可吸收部分变形量，避免壳体与磁极板因膨胀变形而出现破损。
在第二方面的一种可能的实现方式中，所述壳体还包括隔弧板，所述隔弧板与所述承载架上的隔弧部相对设置；所述隔弧部设置有插接槽，所述隔弧板朝向所述承载架的一端位于所述插接槽内。隔弧板插接至隔弧部的插接槽内，可在两个动触点组件之间形成隔离结构，并在壳体的灭弧腔内形成两个独立的腔室并将两个动触点组件可分别位于两个腔室内，以避免每个腔室内产生的电弧发生串扰、碰撞、集聚，进一步提升直流充电电路运行安全。
在第二方面的一种可能的实现方式中，所述壳体设置有静触点，所述静触点与所述动触片上的动触点正对设置，以提升所述动触点与所述静触点之间的电性连接可靠性。
在第二方面的一种可能的实现方式中，所述低压电磁系统包括电磁线圈、动铁芯、 静铁芯以及设置在所述动铁芯和所述静铁芯之间的复位弹簧；所述静铁芯固定在所述磁极板上，所述动铁芯位于所述静铁芯远离所述磁极板的一侧，所述复位弹簧位于所述静铁芯和所述动铁芯之间；所述推杆的一端穿过所述磁极板、所述静铁芯、所述复位弹簧，且所述推杆与所述动铁芯连接；即本申请实施例中低压电磁系统通过单个推杆以带动位于承载架上多组动触点组件移动，并能够实现直流充电电路中的正极线路及负极线路同时导通及断开，简化接触器的结构，节约制作成本。
附图说明
图1为相关技术中的电动汽车与直流快充装置的直流充电电路示意图；
图2为本申请实施例提供的接触器的剖视图；
图3为本申请实施例提供的动触点结构的整体示意图；
图4为本申请实施例提供的动触点结构的正视图；
图5为本申请实施例提供的动触点结构的爆炸示意图；
图6为本申请实施例提供的承载架与推杆的连接示意图一；
图7为本申请实施例提供的承载架与推杆的连接示意图二；
图8为本申请实施例提供的第一轭铁的结构示意图一；
图9为本申请实施例提供的第一轭铁的结构示意图二；
图10为本申请实施例提供的动触片的结构示意图；
图11为本申请实施例提供的动触片与第一轭铁和第二轭铁的连接示意图；
图12为本申请实施例提供的第二轭铁的结构示意图；
图13为本申请实施例提供的固定架与第二轭铁、承载架的连接示意图；
图14为本申请实施例提供的固定架的结构示意图；
图15为本申请实施例提供的固定架与承载架的连接示意图；
图16为本申请实施例提供的第一限位凸起及第二限位凸起在承载架上的布置示意图。
附图标记说明：
10-承载架；                         11-隔弧部；
12-插接槽；                         13-第一凸台；
14-第一定位凸起；                   15-第二定位凸起；
16-金属针；                         20-推杆；
30-弹簧；                           40-第一轭铁；
41-第一底板；                       42-第一耳片；
43-第一工艺孔；                     50-动触片；
51-动触点；                         52-凹陷部；
53-定位凹槽；                       60-第二轭铁；
61-第一连接柱；                     70-固定架；
71-第二底板；                       72-第二耳片；
73-第二工艺孔；                     81-静触点；
82-壳体；                           83-隔弧板；
84-金属连接片；                     90-磁极板；
100-静铁芯；                        110-动铁芯；
120-定位套筒；                      130-电磁线圈；
131-控制板；                        132-引线；
140-复位弹簧；                      200-动触点组件；
411-第二凸台；                      412-定位凸台；
711-第一安装孔；                    722-第一定位孔。
具体实施方式
本申请的实施方式部分使用的术语仅用于对本申请的具体实施例进行解释，而非旨在限定本申请，下面将结合附图对本申请实施例的实施方式进行详细描述。
为方便理解本申请实施例提供的直流接触器，首先说明一下其应用场景，该直流接触器应用于电气连接，例如电动汽车与直流快充装置的连接，或者其他电气柜与其他电气设备的连接。下面以电动汽车与直流快充装置为例说明直流接触器的应用，如图1所示，图1示出了相关技术中的电动汽车与直流快充装置的直流充电电路示意图。
电动汽车内设置有配电盒(Power Distribution Unit,简称PDU)以及与PDU连接的高压电池包，电动汽车的端口具有两个接线端：PIN1及PIN2，其中PIN1为正极端子，PIN2为负极端子，PIN1端子通过一个直流接触器与PDU连接，PDU再与高压电池包的正极连接，PIN2端子通过一个直流接触器与PDU连接,PDU再与高压电池包的负极连接；在电动汽车充电过程中，通过控制直流接触器的开关以及断开来控制直流快充装置与高压电池包的电性连接。
然而，当直流充电电路出现短路电流时，动触点与静触点之间产生的斥力使动触点和静触点断开；此时，直流接触器无法分断此短路电流而导致其炸裂而损坏。
为解决上述问题，本申请实施例提供了一种动触点结构及接触器，其在动触片的两侧分别设置有第一轭铁和第二轭铁，第一轭铁承载动触片，第一轭铁与承载架之间设置有弹簧，以使动触片上的动触点与静触点保持接触；第二轭铁通过固定架固定在承载架上，且第二轭铁与第一轭铁相对设置。当直流充电电路中出现短路电流时，在短路电流产生的磁场作用下，第一轭铁和第二轭铁之间产生电磁吸力，电磁吸力可补偿弹簧的弹力，并可抵消动、静触点间的斥力，以使动触点和静触点保持闭合状态，进而能够避免直流接触器炸裂而破损的现象发生。
图2为本申请实施例提供的接触器的剖视图；如图2所示，本申请实施例提供的接触器可以是直流接触器，直流接触器包括动触点结构、磁极板90、位于磁极板90两侧的壳体82及低压电磁系统。其中，动触点结构包括承载架10以及分别位于承载架10两侧的推杆20、至少一组动触点组件200，承载架10安装在磁极板90上，并位于磁极板90背离低压电磁系统的一侧表面上，推杆20穿过磁极板90与低压电磁系统连接，低压电磁系统产生的磁力，可使推杆20沿其轴向移动，即推杆20带动承载架10相对磁极板90移动。
壳体82罩设在动触点组件200的外侧，壳体82朝向磁极板90的一端固定在磁极板90上，壳体82与动触点组件200相对的位置设置有静触点81，且静触点81位于 壳体82远离磁极板90的一端；静触点81可与动触点组件200中的动触点正对设置。当推杆20带动承载架10朝向背离磁极板90的方向移动时，动触点与静触点81接触；此时直流充电电路导通，相应的，直流快充装置与高压电池包的电性连接，电动汽车处于充电状态。
在一些实施例中，动触点结构包括至少一组动触点组件200，本实施例以动触点结构中设置有两个动触点组件200为例对本申请实施例进行说明，为便于对本申请实施例说明，可定义动触点结构的移动方向为上下方向，即动触点结构中的推杆20的移动方向；两个动触点组件200分别位于推杆20的左右两侧，且两个动触点组件200可关于推杆20左右对称分布；即本申请可通过单个推杆20与低压电磁系统连接，并能够实现直流充电电路中的正极线路及负极线路同时导通及断开，简化接触器的结构，节约制作成本。
本申请实施例中，壳体82可选用陶瓷材料制作，壳体82包括底壁以及围设在底壁下方的侧壁，底壁和侧壁围成矩形壳体82；侧壁远离底壁的一端固定在磁极板90上形成灭弧腔，底壁上设置有多个静触点81。两个动触点组件200均设置在灭弧腔内，且动触点组件200中的动触点与静触点81正对设置。例如，每个动触点组件200中包括一个动触板，每个动触板分别设置有两个动触点，两个动触点分别位于动触板的两端；相应的，底板设置有四个静触点81，一个静触点81分别与一个动触点正对设置。当动触点与静触点81接触时，动触点和静触点81接触瞬间产生电弧，本实施例在动触点组件200外侧设置有陶瓷壳体82，可防止壳体82内部产生的电弧扩散至直流接触器的外部，从而防止电弧干扰及影响直流充电电路的运行安全。
进一步的，壳体82朝向磁极板90的一端设置有金属连接片84，金属连接片84为环形结构，并且金属连接片84沿其轴向截面呈L型。金属连接片84包括第一安装边和第二安装边，且第一安装边与第二安装边垂直。其中，第一安装边可固定在侧壁的端面上或者侧壁的内表面上，第二安装边贴合并固定在磁极板90朝向壳体82的表面上；即壳体82通过金属连接片84固定在磁极板90上。本申请实施例中在壳体82与磁极板90之间设置有金属连接片84，由于金属连接片84具有延展性，当壳体82及磁极板90因受热膨胀而发生变形时，金属连接片84可吸收部分变形量，避免壳体82与磁极板90因膨胀变形而出现破损。
继续参阅图2，低压电磁系统位于磁极板90的下方，低压电磁系统为推杆20提供驱动力及恢复力，推杆20带动承载架10在壳体82内上下移动，保证动触点组件200中的动触点、静触点81闭合或者断开。例如，低压电磁系统包括电磁线圈130、动铁芯110、静铁芯100以及设置在动铁芯110及静铁芯100之间的复位弹簧140；其中，动铁芯110及静铁芯100设置于定位套筒120内，定位套筒120呈“几字型”，其包括一端封闭的筒体以及位于筒体另一端的环形安装边，静铁芯100和动铁芯110设置在筒体内，且静铁芯100靠近环形安装边设置，动铁芯110位于静铁芯100的下方；环形安装边固定在磁极板90背离承载架10的一侧表面上，环形安装边可采用焊接的方式固定在磁极板90上。进一步的静铁芯100也可固定在磁极板90上，且静铁芯100远离动铁芯110的端面可与磁极板90朝向承载架10的一侧表面平齐。
动铁芯110与静铁芯100之间设置有复位弹簧140，复位弹簧140采用非导磁材 料制作，复位弹簧140呈自然状态安装在动铁芯110与静铁芯100之间。推杆20远离承载架10的一端可由上及下依次穿过磁极板90、静铁芯100、复位弹簧140，并与动铁芯110连接；电磁线圈130套设在定位套筒120的外侧，可为动铁芯110与静铁芯100提供磁场。
低压电磁系统还包括控制电磁线圈130工作的控制板131及连接在控制板131上的引线132；当电磁线圈130处于上电状态，在电磁线圈130的产生的磁场作用下，静铁芯100与动铁芯110之间产生电磁吸力，动铁芯110在电磁吸力的作用下克服复位弹簧140的弹力，并带动推杆20向上移动，以使动触点组件200中的动触点与静触点81接触。反之，当电磁线圈130处于断电状态，动铁芯110在复位弹簧140的恢复力的作用下，带动推杆20向下移动，以使动触点与静触点81断开。
图3为本申请实施例提供的动触点结构的整体示意图，图4为本申请实施例提供的动触点结构的正视图；图5为本申请实施例提供的动触点结构的爆炸示意图。如图3至图5所示，本申请实施例提供的动触点结构包括上述承载架10、上述推杆20及上述动触点组件200，承载架10的一侧与推杆20远离动铁芯110的一端连接，承载架10的另一侧设置有两组动触点组件200，两组动触点组件200可左右对称设置在承载架10上。动触点组件200不仅包括动触片50以及设置在动触片50的动触点51，还包括固定架70、弹簧30、第一轭铁40和第二轭铁60；其中，固定架70与承载架10之间形成安装空间，弹簧30、第一轭铁40、动触片50、第二轭铁60可依次设置在安装空间内，第二轭铁60固定在固定架70上远离承载架10的一端，并且第二轭铁60与第一轭铁40相对设置。
具体地，弹簧30可以为螺旋弹簧，弹簧30垂直于承载架10的承载面设置，弹簧30的一端与承载架10连接，弹簧30的另一端与第一轭铁40连接。第一轭铁40用于固定动触片50，并且第一轭铁40与动触片50的中间部分抵接，动触片50的两端分别设置有一个动触点51；第二轭铁60固定在固定架70远离承载架10的一端，且第二轭铁60与第一轭铁40相对设置；固定架70靠近承载架10的一端固定在承载架10上，以使第二轭铁60相对承载架10的安装位置不变，即承载架10与第二轭铁60之间的距离保持不变。
固定架70与承载架10之间形成安装空间，弹簧30呈压缩状态安装在第一轭铁40和承载架10之间，以使动触片50压紧在第一轭铁40和第二轭铁60之间；同时，第一轭铁40和动触片50可随弹簧30的伸缩变形在安装空间内上下移动。当推杆20向上运动，动触点51与静触点81接触时，推杆20继续向上运动，可压缩弹簧30，利用弹簧30的弹力使动触点51和静触点81保持接触状态，可提升动触点51及静触点81的电性连接可靠性。
当直流充电电路中产生短路电流时，此时，流过动触片50的短路电流可产生磁场，第一轭铁40和第二轭铁60在此磁场作用下产生电磁吸力，第一轭铁40可吸附至第二轭铁60上；因而，电磁吸力可对弹簧30的弹力进行补偿，防止动触点51和静触点81因短路电流产生的斥力而出现断开现象；即电磁吸力和弹簧30的弹力形成的合力大于动触点51与静触点81之间的斥力，可使动触点51与静触点81保持闭合状态，进一步可避免直流接触器发生炸裂而损坏。
另外，本申请实施例中的动触片50夹设在第一轭铁40和第二轭铁50之间，其保证了动触片50的结构完整性，与相关技术中动触片50采用孔轴配合的方式进行固定相比，本申请实施例无需在动触片50上设置通孔，从而在相同空间下，本申请实施例中的动触片50的导通面积较大，能够提升了动触片50的电流承载能力及导通能力。
图6为本申请实施例提供的承载架10与推杆20的连接示意图一；如图6所示，在一些实施方式中，本实施例提供的承载架10可以是采用绝缘材料制作而成的支架，可以使动触点结构与位于承载架10一侧的低压电磁系统保持绝缘。承载架10包括底板以及设置在底板上的镂空结构，即在保持承载架10的承载强度的同时，可在底板上设置有减轻孔或者减轻槽等结构，以降低承载架10的制作成本。
进一步的为保证承载架10的结构强度，可在承载架10远离动触点组件200的一侧设置有加强结构，加强结构可以是设置在底板上的金属针16，金属针16可与承载架10一体制作，即当采用注塑工艺制作承载架10时，可将金属针16埋设在承载架10内。本申请实施例中，承载架10设置有加强结构，以提升承载架10的结构强度，防止承载架10在使用过程中发生变形，以保证位于承载架10两侧的动触片50运动的同步性，即当一组动触点组件200中的动触点51与其对应的静触点81接触时，另一组动触点组件200中的动触点51也与其对应的静触点81接触，可保证两个动触点组件200中的动触点51同时与其相对应的静触点81闭合或者断开。
图7为本申请实施例提供的承载架10与推杆20的连接示意图二；如图7所示，并结合图6；本申请实施例中承载架10上对称设置有两组动触点组件200，为将各动触点组件200安装至承载架10上，承载架10与每一个动触点组件200相对的位置分别设置有定位结构以及卡接结构。承载架10设置有两个第一凸台13，第一凸台13位于承载架10的底板朝向弹簧30的一侧，且两个第一凸台13对称设置在底板上。例如，第一凸台13为圆形凸台，第一凸台13与弹簧30配合，可使弹簧30套接至第一凸台13上，从而将弹簧30垂向连接在承载架10上。为便于将弹簧30连接至第一凸台13，本实施例在第一凸台13远离底板的一端进行倒角以形成导向面，可使弹簧30快速套接至第一凸台13上。或者，本实施例中也可在承载架10上设置有用于固定弹簧30的第一凹槽，第一凹槽为圆环形凹槽，第一凹槽与弹簧30配合设置，可使弹簧30的一端嵌设在第一凹槽内。
参阅图6和图7，本申请实施例中的推杆20靠近承载架10的一端与承载架10固定连接，例如，推杆20与承载架10可采用螺纹连接的方式固定在一起，推杆20靠近承载架10的一端设置有连接外螺纹，承载架10设置有螺纹孔，螺纹孔内设置有与推杆20的外接外螺纹相配合的内螺纹。或者，承载架10设置有安装孔，安装孔与推杆20过盈配合，以使推杆20插入并固定在承载架10的安装孔内。或者，推杆20与承载架10均采用绝缘材料制作，即承载架10可与推杆20采用注塑的方式制作成一体结构，以增强推杆20与承载架10的连接强度。
继续参阅图7并结合图3，承载架10背离推杆20的一侧表面上设置有两个隔弧部11，两个隔弧部11分别位于动触片50的两端；且每个隔弧部11均位于两个动触片50之间，并且位于两个动触片50同一端的隔弧部11将位于此端的两个动触点51隔开。
参阅图2，壳体82还设置有隔弧板83，隔弧板83位于两个动触点组件200之间，以将两个动触点组件200隔开；隔弧板83可以是矩形板，隔弧板83设置在壳体82的底壁的中间部分，隔弧板83的一端与壳体82的底壁连接，另一端可朝向磁极板90垂向延伸；为避免隔弧板83对动触点组件200在壳体82的运动造成干涉，隔弧板83朝向磁极板90的一端与承载架10之间预留间隙。
隔弧部11设置有与隔弧板83配合的插接槽12，隔弧板83朝向承载架10的一端可插装在插接槽12内，并且隔弧板83朝向插接槽12的一端与该插接槽12的槽底具有一定距离，可使承载架10在壳体82内向上移动，以保证动触点组件200中的动触点51与静触点81可接触；同时，隔弧板83和隔弧部11可在两个动触点组件200之间形成隔离结构，并在壳体82的灭弧腔内形成两个独立的腔室。本实施例中，将两个动触点组件200可分别位于两个腔室内，以避免每个动触点组件200中的动触点51与对应的静触点81接触而产生的电弧在灭弧腔内发生串扰、碰撞、集聚，从而提升直流充电电路运行安全。
图8为本申请实施例提供的第一轭铁40的结构示意图一，如图8所示，第一轭铁40用于承载动触片50，第一轭铁40朝向承载架10的一侧与弹簧30抵接，第二轭铁60背离承载架10的一侧与动触片50接触。第一轭铁40采用导磁材料制作，其包括第一底板41及两个第一耳片42，第一底板41、第二耳片42可以是矩形板，两个第一耳片42分别位于第一底板41的两侧，第一耳片42的长度方向与第一底板41的长度方向一致，第一耳片42可垂直于第一底板41设置，两个第一耳片42分别连接在第一底板41上并围成U形空间。
本实施例中，第一耳片42和第一底板41可以是一体结构，即对制作第一轭铁40的板材采用折弯工艺制作成一体结构。例如，可在第一耳片42与第一底板41的连接处分别设置有第一工艺孔43，此工艺孔可以长条形孔，第一工艺孔43位于第一耳片42的中间部分，并且第一工艺孔43的长度方向与第一耳片42的长度方向一致。本实施例在第一耳片42与第一底板41的两侧连接处分别设置有第一工艺孔43，可以降低第一耳片42与第一底板41折弯处的结构强度，以便于折弯。
进一步的，本申请实施例中第一底板41朝向承载架10的一侧设置有第二凸台411，第二凸台411与弹簧30相配合，可使弹簧30朝向第一轭铁40的一端套接在第二凸台411上。同样的，第二凸台411的结构与第一凸台13结构相同。例如，第二凸台411为圆形凸台，第一凸台13和第二凸台411相对设置，从而将弹簧30垂向连接在承载架10与第一轭铁40之间。为便于将弹簧30连接至第二凸台411，本实施例在第二凸台411远离第一底板41的一端进行倒角以形成导向面，可使弹簧30快速套接至第二凸台411上。或者，本实施例中也可在第一底板41上设置有用于固定弹簧30的第二凹槽，第二凹槽为圆环形凹槽，第二凹槽与弹簧30配合设置，可使弹簧30的一端嵌设在第二凹槽内。
本申请实施例中弹簧30的一端套接至承载架10的第一凸台13上，另一端套接在第一轭铁40的第二凸台411上，以使弹簧30稳固的连接在第一轭铁40和承载架10之间，防止弹簧30从第一轭铁40及承载架10之间脱出，保证接触器的动触点与静触点之间电性连接的可靠性。
图9为本申请实施例提供的第一轭铁40的结构示意图二；如图9所示，本申请实施例提供的第一轭铁40还包括定位凸台412，定位凸台412位于第一轭铁40朝向动触片50的一侧表面上，动触片50朝向第一轭铁40的表面设置有与定位凸台412相配合的定位凹槽，动触片50可通过其定位凹槽嵌设在第一轭铁40的定位凸台412上，防止动触片50与第一轭铁40之间出现相对移动，以增强动触点51与静触点81之间电性连接可靠性。例如，上述定位凸台412可设置在第一底板41上，且定位凸台412位于第一底板41的中间；相应的，定位凹槽位于动触片50的中间部分，即第一轭铁40与动触片50的中间部分抵接，可保证动触片50两端的动触点51受力均匀，可进一步增强动触点51与静触点81之间电性连接可靠性。
图10为本申请实施例提供的动触片50的结构示意图，图11为本申请实施例提供的动触片50与第一轭铁40和第二轭铁60的连接示意图；如图10和图11所示，本申请实施例提供的动触片50为金属片，其整体呈长条状；沿动触片50的长度方向，动触片50的两端分别设置有一个动触点51，动触点51凸出动触片50朝向第二轭铁60的表面，以便于与壳体82上的静触点81接触。
位于两个动触点51之间的动触片50的部分，即动触片50的中间部分设置有凹陷部52以及上述定位凹槽53。例如，定位凹槽53位于动触片50朝向第一底板41的一侧表面上，定位凹槽53与第一底板41上的定位凸台412配合；动触片50的中间部分的两侧分别设置有一个凹陷部52，且每个凹陷部52分别与第一轭铁40的第一耳片42相互配合。当将动触片50安装至第一轭铁40上时，第一耳片42嵌设在凹陷部52内，同时，定位凸台412可嵌设在定位凹槽53内。本实施例中动触片50通过其定位凹槽53及凹陷部52安装至第一轭铁40上，可增强动触片50与第一轭铁40的连接稳固性。
图12为本申请实施例提供的第二轭铁60的结构示意图，图13为本申请实施例提供的固定架70与第二轭铁60、承载架10的连接示意图。如图12和图13所示，本申请实施例提供的第二轭铁60为矩形板或者方形板，其设置在动触片50的上方；第二轭铁60背离动触片50的一侧可固定在固定架70上。例如，第二轭铁60的一侧设置有第一连接柱61，固定架70设置有与第一连接柱61配合的第一安装孔，即第二轭铁60可通过第一连接柱61固定在固定架70上，可提升第二轭铁60与固定架70之间的连接效率。固定架70远离第二轭铁60的一端安装在承载架10上，可使第二轭铁60相对承载架10的安装位置固定。在弹簧30弹力作用下，第二轭铁60朝向动触片50的一侧可与动触片50抵接，即可将动触片50夹设在第一轭铁40和第二轭铁60之间。
图14为本申请实施例提供的固定架70的结构示意图；如图14所示，本申请实施例提供的固定架70包括第二底板71及两个第二耳片72，两个第二耳片72设置在第二底板71的两侧，并垂直于第二底板71设置，第二底板71与两个第二耳片72围成U形支架。第二底板71与承载架10相对设置，弹簧30、第一轭铁40、部分动触片50及第二轭铁60均位于第二底板71与承载架10之间，并能够对第一轭铁40和动触片50进行导向。
第二底板71用于固定第二轭铁60，第二底板71设置有与第一连接柱61配合的第一安装孔711，第二轭铁60朝向第二底板71的一侧表面可与第二底板71的表面贴合。第二耳片72的一端与第二底板71连接，第二耳片72的另一端可固定在承载架 10上，以使第二轭铁60相对于承载架10的安装位置不变。例如，两个第二耳片72可与第二底板71采用折弯的方式形成一体结构，为便于对用于制作固定架70的板材进行折弯，本实施例在用于制作固定架70的板材上制作工艺孔。
在一种可实施方式中，每个第二耳片72分别设置有第二工艺孔73，第二工艺孔73可以是位于第二耳片72靠近第二底板71的一端的长条孔，并且第二工艺孔73位于第二耳片72的中间部分，第二工艺孔73的长度方向与第二耳片72的延伸方向一致。第二工艺孔73靠近第二底板71的一端可延伸至第二底板71上，即在第二底板71与第二耳片72的连接处设置有第二工艺孔73，可降低第二底板71与第二耳片72连接处的结构强度，便于对第二耳片72进行折弯。当然，本实施例也可单独制作第二耳片72和第二底板71，再将第二耳片72固定在第二底板71上，本实施例对固定架70的成型方式不加以限制。
如图15为本申请实施例提供的固定架70与承载架10的连接示意图；如图15所示，固定架70中的第二耳片72远离其的一端固定在承载架10上，承载架10上设置有用于固定每一个第二耳片72的固定结构；每个固定结构均包括一个第一定位凸起14及两个第二定位凸起15，第一定位凸起14位于两个第二定位凸起15之间，两个第二定位凸起15可对称设置在第一定位凸起14的两侧。
参阅图14，第二耳片72可以是矩形板，第二耳片72远离第二底板71的一端设置有第一定位孔722，第一定位孔722与第一定位凸起14配合，并且两个第二定位凸起15之间的距离与第二耳片72的宽度配合。当第二耳片72需固定在承载架10上时，第二耳片72通过其第一定位孔722卡接在第一定位凸起14上；同时，两个第二定位凸起15可分别与第二耳片72的两侧抵接，即将第二耳片72夹设在两个第二定位凸起15之间。本申请实施例中固定架70与承载架10以卡接的方式固定在一起，方便对固定架70进行拆卸及安装。另外，本申请实施例中，固定结构均具有一定弹性，为保证固定结构的结构强度，上述第一定位凸起14和第二定位凸起15可采用具有一定弹性的金属板材制作。
图16为本申请实施例提供的第一定位凸起14及第二定位凸起15在承载架10上布置示意图，如图16所示，为进一步提升上述固定结构的结构强度，可将用于安装固定架70的两个固定结构设置在同一个固定支架上；承载架10上设置有固定支架，固定支架可以是埋设在承载架10内的金属支架，并且固定支架的两侧均设置有凸出于承载架10边缘的第一定位凸起14及两个第二定位凸起15，第一定位凸起14用于与第二耳片72的第一定位孔722卡接，两个第二定位凸起15可与第二耳片72的侧面抵接，以将两个第二耳片72分别固定在固定支架上。本申请实施例在承载架10上埋设有固定支架，固定支架将分别用于固定两个第二耳片72的固定结构集成在同一个支架上，可增强固定结构的结构强度，可提升固定架70与承载架10之前的连接可靠性。
在另一实施例中，上述接触器也可以是交流接触器，交流接触器所连接的电路通常为三路电路，与直流接触器的所在的二路电路相比，其区别在于：交流接触器包括设置在承载架10上的三组动触点组件200，相应的，交流接触器设置的静触点数量也随之变化。同样的，承载架10也可在相邻两个动触点组件200之间设置有隔弧板以及隔弧部，以将各动触点组件分别设置在壳体形成的独立腔室内；对于交流接触器的动 触点组件可参照上述直流接触器的动触点组件200进行设置，此处不再赘述。
在本申请实施例的描述中，需要说明的是，除非另有明确的规定和限定，术语“安装”、“相连”、“连接”应作广义理解，例如，可以是固定连接，也可以是通过中间媒介间接相连，可以是两个元件内部的相连或者两个元件的相互作用关系。对于本领域的普通技术人员而言，可以根据具体情况理解上述术语在本申请实施例中的具体含义。
本申请实施例的说明书中的术语“第一”、“第二”、“第三”、“第四”等(如果存在)是用于区别类似的对象，而不必用于描述特定的顺序或先后次序。
最后应说明的是：以上各实施例仅用以说明本申请实施例的技术方案，而非对其限制；尽管参照前述各实施例对本申请实施例进行了详细的说明，本领域的普通技术人员应当理解：其依然可以对前述各实施例所记载的技术方案进行修改，或者对其中部分或者全部技术特征进行等同替换；而这些修改或者替换，并不使相应技术方案的本质脱离本申请实施例各实施例技术方案的范围。

Claims (19)

  1. 一种动触点结构，其特征在于，包括：承载架、推杆及至少一组动触点组件；
    所述推杆设置在所述承载架的一侧，所述动触点组件设置在所述承载架的另一侧；
    所述动触点组件包括固定在所述承载架上的固定架，以及设置在所述承载架与所述固定架之间的弹簧、第一轭铁、动触片及第二轭铁；
    所述弹簧的一端与所述承载架连接，所述弹簧的另一端与所述第一轭铁连接，所述动触片设置在所述第一轭铁上；所述第二轭铁固定在所述固定架上，并与所述第一轭铁相对设置。
  2. 根据权利要求1所述的动触点结构，其特征在于，所述承载架朝向所述弹簧的表面设置有用于套接所述弹簧的第一凸台或者第一凹槽；
    所述第一轭铁朝向所述弹簧的表面设置有用于套接所述弹簧的第二凸台或者第二凹槽。
  3. 根据权利要求1所述的动触点结构，其特征在于，所述第一轭铁朝向所述动触片的表面设置有定位凸台；
    所述动触片朝向所述第一轭铁的表面设置有与所述定位凸台配合的定位凹槽。
  4. 根据权利要求3所述的动触点结构，其特征在于，所述第一轭铁包括第一底板以及位于所述第一底板的两侧边缘的两个第一耳片，两个所述第一耳片和所述第一底板围成U型空间；
    所述动触片的两侧分别设置有凹陷部，所述动触片位于所述U型空间内，两个所述第一耳片分别卡合在对应的所述凹陷部内。
  5. 根据权利要求4所述的动触点结构，其特征在于，所述定位凸台位于所述第一底板上。
  6. 根据权利要求4所述的动触点结构，其特征在于，所述第一耳片与所述第一底板的连接处设置有第一工艺孔，所述第一工艺孔位于所述第一耳片的中间部分。
  7. 根据权利要求1至6任一项所述的动触点结构，其特征在于，所述固定架包括第二底板，以及位于所述第二底板的两侧的两个第二耳片，两个所述第二耳片与所述第二底板围成U型支架；
    所述第二轭铁固定在所述第二底板上，两个所述第二耳片远离所述第二底板的一端分别固定在所述承载架上。
  8. 根据权利要求7所述的动触点结构，其特征在于，所述承载架设置有用于固定每个所述第二耳片的第一限位凸起和两个第二限位凸起，两个所述第二限位凸起分别对称设置于所述第一限位凸起的两侧；
    所述第二耳片朝向所述承载架的一端设置有与所述第一限位凸起配合的第一定位孔，所述第二耳片通过所述第一定位孔卡接在所述第一定位凸起上；
    两个所述第二限位凸起分别与一个所述第二耳片的两侧抵接。
  9. 根据权利要求7所述的动触点结构，其特征在于，两个所述第二耳片朝向所述第二底板的一侧分别设置有第二工艺孔，所述第二工艺孔沿所述第二耳片的长度方向延伸；
    所述第二工艺孔靠近所述第二底板的一端可延伸至所述第二底板。
  10. 根据权利要求7所述的动触点结构，其特征在于，所述第二轭铁朝向所述第二底板的表面设置有第一连接柱，所述第二底板设置有与所述第一连接柱配合的第一安装孔；
    所述第二轭铁通过所述第一连接柱固定在所述第二底板上。
  11. 根据权利要求1所述的动触点结构，其特征在于，所述承载架设置有加强结构，所述加强结构位于所述承载架背离所述动触点组件的一侧。
  12. 根据权利要求11所述的动触点结构，其特征在于，所述承载架为绝缘材质制作的支架，所述承载架具有镂空结构；
    所述加强结构为埋设在所述承载架内的金属针。
  13. 根据权利要求1所述的动触点结构，其特征在于，所述承载架设置有两组所述动触点组件，两组所述动触点组件关于所述推杆左右对称；
    两个所述动触点组件中的动触片平行且相对设置，每个所述动触片上设置有两个动触点。
  14. 根据权利要求13所述的动触点结构，其特征在于，所述承载架相对设置有两个隔弧部，其中一个所述隔弧部位于所述动触片的一端，另一个所述隔弧部位于所述动触片的另一端；
    每个所述隔弧部分别与位于两个所述动触片同一端的动触点相对设置。
  15. 一种接触器，其特征在于，包括壳体、磁极板、低压电磁系统以及权利要求1至14任一项所述的动触点结构；
    所述壳体连接在所述磁极板上形成灭弧腔，所述低压电磁系统位于所述磁极板远离所述壳体的一侧；
    所述动触点结构设置在所述灭弧腔内，且所述动触点结构中的推杆穿过所述磁极板与所述低压电磁系统连接。
  16. 根据权利要求15所述的接触器，其特征在于，所述壳体靠近所述磁极板的一端设置有金属连接片，所述壳体通过所述金属连接片与所述磁极板连接。
  17. 根据权利要求15所述的接触器，其特征在于，所述壳体还包括隔弧板，所述隔弧板与所述承载架上的隔弧部相对设置；
    所述隔弧部设置有插接槽，所述隔弧板朝向所述承载架的一端位于所述插接槽内。
  18. 根据权利要求15所述的接触器，其特征在于，所述壳体设置有静触点，所述静触点与所述动触片上的动触点正对设置。
  19. 根据权利要求15所述的接触器，其特征在于，所述低压电磁系统包括电磁线圈、动铁芯、静铁芯以及设置在所述动铁芯和所述静铁芯之间的复位弹簧；
    所述静铁芯固定在所述磁极板上，所述动铁芯位于所述静铁芯远离所述磁极板的一侧，所述复位弹簧位于所述静铁芯和所述动铁芯之间；
    所述推杆的一端穿过所述磁极板、所述静铁芯、所述复位弹簧，且所述推杆与所述动铁芯连接。
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