High-voltage direct-current contactor capable of monitoring normally-open and normally-closed working states of main loop
By designing the structure of micro switches and auxiliary push springs in high-voltage DC contactors, the magnetic field drives the dynamic core to drive the contact bridge to contact the contact rod, and triggers the micro switch, the problem that the existing contactor cannot detect the opening and closing state is solved, and the accurate detection and diagnosis of the contactor status is achieved.
Patent Information
- Application Number
- CN202422130990.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-30
- Publication Date
- 2025-06-17
- Estimated Expiration
- 2034-08-30
AI Technical Summary
The existing high-voltage DC contactors cannot detect the opening and closing state, which makes it impossible to clearly know whether the contactor is operating normally, and it is difficult to diagnose the bus line.
A high-voltage DC contactor is designed, including a housing, sleeve, coil, dynamic core, static core, bracket, contact bridge, push rod, contact rod, micro switch and auxiliary push spring. The coil is energized to generate a magnetic field, and the moving iron core drives the contact bridge to contact the contact rod, and triggers the micro switch through the auxiliary push spring to detect the opening and closing state of the contactor.
It realizes clear detection of the contactor opening and closing state, which can accurately prompt the user whether the contactor opening and closing state is stable, thereby facilitating the diagnosis of the bus line.
Smart Images
Figure CN222995319U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of contactors, in particular to a high-voltage DC contactor capable of monitoring the normally open and normally closed working states of the main circuit. Background Technique
[0002] The high-voltage DC contactor is one of the important electrical components in new energy. Its function is to control the on-off of the circuit in the high-voltage DC system. This contactor can withstand high voltage and high current, and can quickly turn on and off the circuit without manual intervention.
[0003] The high-voltage DC contactor generally includes a main circuit used to connect the load to realize the on-off control of the load. At present, the existing DC contactors mainly consist of a driving mechanism and an operating mechanism. When the driving mechanism is energized by a coil to generate a magnetic field and a magnetic potential difference is generated at the magnetic gap, that is, the electromagnetic suction force, the operating mechanism moves upward by the iron core (moving), and then drives the contact bridge to move upward, so that both ends of the contact bridge are attracted and connected to the two main contacts respectively; when the coil is powered off, the electromagnetic suction force disappears, and the moving iron core is released under the action of the contact spring, the return spring and its own gravity, so that both ends of the contact bridge are disconnected from the two main contacts respectively.
[0004] However, currently, the high-voltage DC contactors usually cannot detect the opening and closing states, making it impossible to clearly know whether the contactors are operating normally, and thus it is difficult to diagnose the total circuit. Content of the Utility Model
[0005] The purpose of the utility model is to provide a high-voltage DC contactor capable of monitoring the normally open and normally closed working states of the main circuit, which can improve the detection effect of the opening and closing states of the contactor.
[0006] To solve the above technical problems, the utility model provides a high-voltage DC contactor capable of monitoring the normally open and normally closed working states of the main circuit, including a housing, a sleeve arranged inside the housing, a coil wound around the outer periphery of the sleeve, a moving iron core movably installed inside the sleeve, a static iron core arranged at one end of the sleeve, and a bracket arranged on the side of the static iron core away from the moving iron core. A contact bridge is arranged on the side of the bracket, and a push rod is connected between the bracket and the moving iron core. A contact rod matching the contact bridge is arranged on the housing, so that when the moving iron core moves towards the static iron core, the contact bridge moves towards the contact rod and contacts it; a microswitch is arranged inside the housing, and an auxiliary push spring matching the microswitch is arranged on the side of the bracket, so that after the contact bridge contacts the contact rod, the auxiliary push spring contacts the microswitch.
[0007] Furthermore, a sub-bracket is arranged on the side of the bracket, a push rod is arranged on the sub-bracket, and the auxiliary push spring is in interference fit with the push rod.
[0008] Further, a contact spring is connected between the contact bridge and the bracket, so that after the contact bridge contacts the contact rod, the bracket can continue to move a certain distance.
[0009] Further, the distance between the end of the auxiliary push spring and the micro switch is greater than the distance between the contact bridge and the contact rod and less than the total stroke of the bracket movement.
[0010] Further, an insulating cover is arranged on the inner side of the housing, an auxiliary circuit board is connected to the insulating cover, and the micro switch is connected to the side of the auxiliary circuit board.
[0011] Further, a plurality of contact reeds are arranged on the auxiliary circuit board, a plurality of auxiliary rods corresponding to the contact reeds are arranged on the housing, and the contact reeds are electrically connected to the micro switch.
[0012] Further, a plurality of wires are sequentially connected to the plurality of auxiliary rods, and the ends of the wires have chucks, so that the auxiliary rods are clamped on the chucks.
[0013] Further, a plurality of card slots are arranged on the outer side of the housing, so that the plurality of wires are respectively buckled in the plurality of card slots.
[0014] Further, a reaction spring is arranged between the moving iron core and the static iron core, so that a gap is formed between the moving iron core and the static iron core through the reaction spring.
[0015] Further, an avoidance groove is formed on the side of the insulating cover, and the auxiliary bracket is movably connected to the avoidance groove.
[0016] The beneficial effects of the utility model are as follows: When the coil is energized, a magnetic field is generated, and a magnetic potential difference is generated at the magnetic gap, that is, an electromagnetic suction force, which causes the moving iron core to move along the sleeve towards the static iron core. Then, through the push rod and the bracket, the contact bridge is driven to move towards the contact rod, so that the contact bridge and the contact rod are attracted and connected. After the contact bridge contacts the contact rod, the bracket drives the auxiliary push spring to contact the micro switch, so that the micro switch is triggered, and then the micro switch can send out a signal to indicate that the opening state of the contactor is normal; When the coil is powered off, the electromagnetic suction force disappears, and the moving iron core moves away from the static iron core for reset, so that the contact bridge and the contact rod are disconnected. At this time, the bracket drives the auxiliary push spring to move away from the micro switch, so that the micro switch is closed, and then it indicates that the closing state of the contactor is normal, thus clearly prompting the user whether the opening and closing states of the contactor are stable. Brief Description of the Drawings
[0017] Figure 1 is a schematic structural diagram of the utility model.
[0018] Figure 2 is a side view of the utility model.
[0019] Figure 3 is the utility model Figure 2Cross-sectional view along line A-A.
[0020] Figure 4 is a partial enlarged view of part A in the present utility model Figure 3 in the present utility model.
[0021] Figure 5 is the front view of the present utility model.
[0022] Figure 6 is the present utility model Figure 5 Cross-sectional view along line B-B.
[0023] Figure 7 is a schematic structural view of the card slot in the present utility model.
[0024] Reference numerals: 1, outer shell; 2, sleeve; 3, coil; 4, moving iron core; 5, static iron core; 6, bracket; 7, contact bridge; 8, push rod; 9, contact rod; 10, microswitch; 11, auxiliary push spring; 12, auxiliary bracket; 13, ejector rod; 14, contact spring; 15, insulating cover; 16, auxiliary circuit board; 17, contact reed; 18, auxiliary rod; 19, wire; 20, chuck; 21, card slot; 22, reaction spring; 23, avoidance groove. Detailed implementation manners
[0025] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art shall fall within the protection scope of the present utility model.
[0026] Those skilled in the art should understand that in the disclosure of the present utility model, the orientation or positional relationships indicated by the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationships shown in the accompanying drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the above terms should not be construed as limiting the present utility model.
[0027] It can be understood that the term "one" should be understood as "at least one" or "one or more". That is, in one embodiment, the number of one element can be one, while in other embodiments, the number of the element can be multiple. The term "one" should not be construed as limiting the quantity.
[0028] Such as Figures 1-7As described above, the present utility model provides a high-voltage DC contactor capable of monitoring the normally open and normally closed working states of the main circuit, including a housing 1, a sleeve 2 disposed inside the housing 1, a coil 3 wound around the outer periphery of the sleeve 2, a moving iron core 4 movably installed inside the sleeve 2, a static iron core 5 disposed at one end of the sleeve 2, and a bracket 6 disposed on the side of the static iron core 5 away from the moving iron core 4. A contact bridge 7 is provided on the side of the bracket 6, and a push rod 8 is connected between the bracket 6 and the moving iron core 4. A contact rod 9 matching the contact bridge 7 is provided on the housing 1, so that when the moving iron core 4 moves towards the static iron core 5, the contact bridge 7 moves towards the contact rod 9 and contacts it; A micro switch 10 is provided inside the housing 1, and an auxiliary push spring 11 matching the micro switch 10 is provided on the side of the bracket 6, so that after the contact bridge 7 contacts the contact rod 9, the auxiliary push spring 11 contacts the micro switch 10.
[0029] When the coil is energized, a magnetic field is generated, and a magnetic potential difference is generated at the magnetic gap, which is the electromagnetic attraction force. As a result, the moving iron core moves along the sleeve towards the static iron core. Then, the contact bridge is driven towards the contact rod through the push rod and the bracket, so that the contact bridge and the contact rod are attracted and connected. After the contact bridge contacts the contact rod, the bracket drives the auxiliary push spring to contact the micro switch, triggering the micro switch. Thus, the micro switch can send out a signal to indicate that the opening state of the contactor is normal; When the coil is powered off, the electromagnetic attraction force disappears, and the moving iron core moves away from the static iron core for resetting, causing the contact bridge and the contact rod to disconnect. At this time, the bracket drives the auxiliary push spring away from the micro switch, closing the micro switch, thereby indicating that the closing state of the contactor is normal, and clearly prompting the user whether the opening and closing states of the contactor are stable.
[0030] Among them, the housing is made of an insulating material, such as ceramic material. The coil is connected to the power supply to ensure that the coil can be energized to generate a magnetic field, and the basic usage method of the contactor in this solution is the same as that of the existing contactor.
[0031] Preferably, a sub-bracket 12 is provided on the side of the bracket 6, a push rod 13 is provided on the sub-bracket 12, and the auxiliary push spring 11 is in interference fit with the push rod 13.
[0032] Specifically, through the interference fit between the push rod and the auxiliary push spring, the installation stability of the auxiliary push spring is ensured, thereby ensuring the stable triggering of the auxiliary push spring on the micro switch. At the same time, the accurate installation position of the auxiliary push spring is ensured through the sub-bracket.
[0033] Preferably, a contact spring 14 is connected between the contact bridge 7 and the bracket 6, so that after the contact bridge 7 contacts the contact rod 9, the bracket 6 can continue to move a certain distance.
[0034] Specifically, through the setting of the contact spring, after the contact bridge moves with the bracket and contacts the contact rod, while maintaining the stable connection between the contact bridge and the contact rod, the bracket can still move a certain distance to ensure the normal startup of the micro switch.
[0035] Preferably, the distance between the end of the auxiliary push spring 11 and the micro switch 10 is greater than the distance between the contact bridge 7 and the contact rod 9 and less than the total stroke of the movement of the bracket 6.
[0036] Specifically, when the contact bridge and the contact rod are initially in contact, the auxiliary push spring has not triggered the micro switch. Subsequently, the bracket continues to move a certain distance, causing the auxiliary push spring to trigger the micro switch, so as to ensure that the activation of the micro switch is later than the triggering time of the contact bridge and the contact rod, that is, the activation state of the micro switch is later than the activation time of the contactor, so as to ensure that when the micro switch is activated, it can accurately indicate the activation state of the contactor.
[0037] Preferably, an insulating cover 15 is provided inside the housing 1, an auxiliary circuit board 16 is connected to the insulating cover 15, and the micro switch 10 is connected to the side of the auxiliary circuit board 16.
[0038] Specifically, the contact bridge, the bracket and other structures are protected by the insulating cover to improve the operating stability of the contactor, and the position of the micro switch is limited to ensure that the auxiliary push spring can accurately trigger the micro switch.
[0039] Preferably, a plurality of contact reeds 17 are provided on the auxiliary circuit board 16, a plurality of auxiliary rods 18 corresponding to the contact reeds 17 are provided on the housing 1, and the contact reeds 17 are electrically connected to the micro switch 10.
[0040] Specifically, through the arrangement of the contact reeds and the auxiliary rods, the transmission signal of the micro switch can be stably transmitted outward through the contact reeds and the auxiliary rods, thereby ensuring the detection effect of the micro switch on the contactor.
[0041] Preferably, a plurality of wires 19 are sequentially connected to a plurality of auxiliary rods 18, and the ends of the wires 19 have chucks 20 so that the auxiliary rods 18 are clamped on the chucks 20.
[0042] Specifically, the transmission signal of the micro switch is sequentially transmitted outward through the contact reeds, the auxiliary rods and the wires to ensure the stable transmission of the micro switch. At the same time, the connection stability between the wire and the auxiliary rod is increased through the chuck, avoiding the failure of the signal transmission of the micro switch.
[0043] Among them, the chuck is arranged in a ring structure, and a plurality of teeth are arranged circumferentially on the inner side of the ring structure to limit the circumference of the auxiliary rod circumferentially. At the same time, the whole chuck is made of copper material to ensure the electrical connection between the wire and the auxiliary rod. It is worth mentioning that the auxiliary rod and the contact reed are also connected through the chuck.
[0044] Preferably, a plurality of slots 21 are provided on the outer side of the housing 1 so that a plurality of wires 19 are respectively fastened in a plurality of slots 21.
[0045] Specifically, each wire is limited and guided through the card slot to avoid chaos among multiple wires, so as to improve the convenience and stability of maintenance and installation.
[0046] Preferably, a reaction spring 22 is arranged between the moving iron core 4 and the static iron core 5, so that a gap is formed between the moving iron core 4 and the static iron core 5 through the reaction spring 22.
[0047] Specifically, after the coil is powered off, the reaction spring pushes the moving iron core to move away from the static iron core, so that the moving iron core drives the contact bridge to move away from the contact rod for disconnection operation, and at the same time drives the auxiliary push spring to move away from the micro switch.
[0048] Preferably, an avoidance groove 23 is formed on the side of the insulating cover 15, and the auxiliary bracket 12 is movably connected to the avoidance groove 23.
[0049] Specifically, when the bracket drives the auxiliary bracket to move, the avoidance groove ensures that the auxiliary bracket has sufficient moving space, so as to ensure the stable contact between the auxiliary push spring and the micro switch.
[0050] The present utility model is not limited to the above best embodiment, and anyone can obtain other various forms of products under the inspiration of the present utility model. However, no matter what changes are made in its shape or structure, as long as it has the same or similar technical solutions as the present application, it falls within the protection scope of the present utility model.
Claims
1. A high-voltage DC contactor capable of monitoring the normally open and normally closed working states of a main circuit, characterized in that: The invention comprises a housing (1), a sleeve (2) arranged inside the housing (1), a coil (3) wound around the outer periphery of the sleeve (2), a moving iron core (4) movably mounted inside the sleeve (2), a stationary iron core (5) arranged at one end of the sleeve (2), and a bracket (6) arranged on the side of the stationary iron core (5) away from the moving iron core (4), wherein the side of the bracket (6) has a contact bridge (7), and a push rod (8) is connected between the bracket (6) and the moving iron core (4), and the housing (1) is provided with a A contact rod (9) matching the contact bridge (7) is arranged, so that when the moving iron core (4) moves toward the stationary iron core (5), the contact bridge (7) moves toward and contacts the contact rod (9); a micro switch (10) is arranged inside the housing (1), and an auxiliary push spring (11) matching the micro switch (10) is arranged on the side of the bracket (6), so that after the contact bridge (7) contacts the contact rod (9), the auxiliary push spring (11) contacts the micro switch (10).
2. The high-voltage DC contactor capable of monitoring the normally open and normally closed working states of the main circuit according to claim 1, characterized in that: The side of the bracket (6) is provided with a sub-bracket (12), a push rod (13) is arranged on the sub-bracket (12), and the auxiliary thrust spring (11) and the push rod (13) are in interference fit.
3. The high-voltage DC contactor capable of monitoring the normally open and normally closed working states of the main circuit according to claim 1, characterized in that: A contact spring (14) is connected between the contact bridge (7) and the bracket (6), so that after the contact bridge (7) contacts the contact rod (9), the bracket (6) can continue to move a certain distance.
4. The high-voltage DC contactor capable of monitoring the normally open and normally closed working states of the main circuit according to claim 2, characterized in that: The distance between the end of the auxiliary thrust spring (11) and the micro switch (10) is greater than the distance between the contact bridge (7) and the contact rod (9) and is less than the total travel of the bracket (6).
5. The high-voltage DC contactor capable of monitoring the normally open and normally closed working states of the main circuit according to claim 2, characterized in that: An insulating cover (15) is arranged inside the housing (1), an auxiliary circuit board (16) is connected to the insulating cover (15), and the micro switch (10) is connected to the side of the auxiliary circuit board (16).
6. The high-voltage DC contactor capable of monitoring the normally open and normally closed working states of the main circuit according to claim 5, characterized in that: A plurality of contact springs (17) are arranged on the auxiliary circuit board (16), a plurality of auxiliary rods (18) corresponding to the contact springs (17) are arranged on the housing (1), and the contact springs (17) are electrically connected to the micro switch (10).
7. The high-voltage DC contactor capable of monitoring the normally open and normally closed working states of the main circuit according to claim 6, characterized in that: A plurality of conducting wires (19) are connected to a plurality of auxiliary rods (18) in sequence, and a chuck (20) is provided at the end of the conducting wire (19) so that the auxiliary rod (18) is clamped on the chuck (20).
8. The high-voltage DC contactor capable of monitoring the normally open and normally closed working states of the main circuit according to claim 7, characterized in that: The outer side of the housing (1) is provided with a plurality of slots (21) so that a plurality of wires (19) are respectively buckled in the plurality of slots (21).
9. The high-voltage DC contactor capable of monitoring the normally open and normally closed working states of the main circuit according to claim 1, characterized in that: A reaction force spring (22) is arranged between the moving iron core (4) and the stationary iron core (5), so that a gap is formed between the moving iron core (4) and the stationary iron core (5) through the reaction force spring (22).
10. The high-voltage DC contactor capable of monitoring the normally open and normally closed working states of the main circuit according to claim 5, characterized in that: An escape groove (23) is provided on the side of the insulating cover (15), and the auxiliary bracket (12) is movably connected to the escape groove (23).