A kind of auxiliary contact lead-out structure of high voltage DC relay

Abstract

The present invention discloses a high-voltage DC relay auxiliary contact lead-out structure, which relates to the technical field of relays, and also includes a contact lead-out mechanism for connecting the auxiliary contact to cooperate with the moving contact to move, an auxiliary arc breaking mechanism for assisting the moving contact and the auxiliary contact to break the arc, and a mobile control mechanism for controlling the movement of the contact lead-out mechanism. The auxiliary contact lead-out mechanism of the relay is changed from a traditional fixed type to a semi-movable type, so that the gap between the moving contact and the auxiliary contact is effectively increased without changing the moving distance of the moving contact. The higher the gap, the easier it is to break the arc. At the same time, when the moving contact moves, the auxiliary arc breaking mechanism will also intervene in the work synchronously, and the arc breaking effect will be improved twice. At the same time, the auxiliary arc breaking mechanism can also be used to process the contact surface and adjust the position of the auxiliary contact, and no additional power source is required. All working states are consistent with the contact movement state.

Description

Technical Field

[0001] The invention relates to the technical field of relays, and in particular to a high-voltage direct current relay auxiliary contact lead-out structure. Background Art

[0002] Electromagnetic relays are generally composed of an iron core, a coil, an armature, and a contact spring. As long as a certain voltage is applied to both ends of the coil, a certain current will flow through the coil, thereby generating an electromagnetic effect. The armature will overcome the pulling force of the return spring under the action of electromagnetic attraction and be attracted to the iron core, thereby driving the armature's moving contact and auxiliary contact to close. When the coil is powered off, the electromagnetic attraction also disappears, and the armature will return to its original position under the reaction force of the spring, releasing the moving contact and the original auxiliary contact. In this way, the purpose of conducting and cutting off in the circuit is achieved by closing and releasing.

[0003] The relay has a main contact. If the opening and closing state of the main contact is to be monitored, the high-voltage relay usually carries a set of auxiliary contacts. The auxiliary contact lead-out method is the most direct and simple lead-out method through the lead-out wire, but this lead-out method requires digging grooves on the shell to avoid the position, which seriously affects the appearance of the product. At the same time, the contact lead-out structure is often used to limit the position of the static contact. During the use of the contact, a common problem is arcing, and the surface is uneven due to burning and wear. To solve the arcing, it is necessary to control the distance between the static contact and the moving contact, but the movement trajectory of the moving contact is often fixed, and the existing static contact position remains unchanged. The arcing problem between the static contact and the moving contact cannot be effectively solved. At the same time, during the use process, in a circuit, in order to ensure the safe use of the circuit, the relay's passable current is often greater than the circuit current. For this reason, the same model of relays will be used in different circuits, and the arcing of the relay will change with the pass-through current value. The existing relay moving contact has a fixed moving position, and the fixed distance may not necessarily break the arc. In the long run, it will cause serious burning of the endpoints, making the contact effect of the contacts worse. Summary of the invention

[0004] The technical solution of the present invention aims at the technical problem that the existing technical solution is too single, and provides a solution that is significantly different from the existing technology. An embodiment of the present invention provides a high-voltage DC relay auxiliary contact lead-out structure to solve the existing technical problem.

[0005] The embodiment of the present invention adopts the following technical scheme: a high-voltage DC relay auxiliary contact lead-out structure, including a shell and a moving contact assembly, wherein an armature for driving the moving contact assembly to move is arranged in the shell, and also includes a contact lead-out mechanism for connecting the auxiliary contact to cooperate with the moving contact to move, an auxiliary arc breaking mechanism for assisting the moving contact and the auxiliary contact to break the arc, and a mobile control mechanism for controlling the movement of the contact lead-out mechanism, wherein the contact lead-out mechanism includes a fixed lead-out plate and a movable lead-out plate, wherein the fixed lead-out plate is connected to the pin, and a connecting plate is arranged between the fixed lead-out plate and the movable lead-out plate, wherein a plurality of auxiliary contacts are arranged at the end of the movable lead-out plate, and matching holes are arranged at both ends of the movable lead-out plate, and a plurality of moving contacts corresponding to the auxiliary contacts are arranged below the auxiliary contacts, and the lower ends of both ends of the connecting frame are hollow.

[0006] Furthermore, the movement control mechanism includes a connecting frame and a driving screw rod, the connecting frame passes through the shell and is placed in a matching hole opened by the movable lead-out plate, a control bolt is arranged at the end of the connecting frame, the driving screw rod is connected to the side wall of the moving contact through a second connecting frame, the position of the driving screw rod corresponds to the position of the matching hole, the driving screw rod is externally threadedly connected to a rotating ring, the upper end of the rotating ring is connected to a connecting ring, the top of the connecting ring is connected to a guide rail, a movable frame is connected in the guide rail, the end of the movable frame is connected to the movable lead-out plate, a first connecting frame is arranged outside the rotating ring, the first connecting frame is connected to the inner wall of the shell, and a driving gear is arranged below the rotating ring.

[0007] Furthermore, the control bolt is threadedly connected to the housing.

[0008] Furthermore, the guide rail is made of a plastic deformable material.

[0009] Furthermore, the inner diameter of the connecting frame is larger than the outer diameter of the driving screw rod, and the lower ends of both sides of the connecting frame are connected to the upper ends of the guide rails, and the inner diameter of the guide rails is larger than the outer diameter of the driving screw rod.

[0010] Furthermore, the connecting plate is slidably connected to the fixed lead-out plate.

[0011] Furthermore, the auxiliary arc breaking mechanism includes a plurality of matching plates, the matching plates are located below the auxiliary contacts, the plurality of matching plates are connected by a third connecting frame, matching racks are provided at both ends of the third connecting frame, the matching racks are meshed and connected with the driving gear, interference blocks are provided at the ends of the matching plates, limiting blocks are provided on both sides of the auxiliary contacts, the limiting blocks are movably connected to the auxiliary contacts by a connecting rod, a spring is provided between the connecting rod and the upper inner wall of the limiting block, and a spring connecting block is provided on the outside of the limiting block.

[0012] Furthermore, the contact surface between the abutment block and the limiting block is an inclined surface.

[0013] Furthermore, the matching plate is made of plastic surface friction material.

[0014] Compared with the prior art, the beneficial effects of the present invention are:

[0015] First, the lead-out structure of the existing auxiliary contact is adjusted, from a fixed lead-out with a static contact to a movable lead-out, so that the auxiliary contact is also driven to move synchronously during the movement of the moving contact, but the moving distance of the moving contact does not change, and the actual relative movement distance between the two is effectively improved. (During the separation process, due to the existence of an arc, the greater the moving distance, the easier it is to break the arc. For this reason, the static contact can also move synchronously with the moving contact, which can facilitate arc breaking.) But how is the lead-out mechanism designed? During the process, it is divided into movable lead-out and fixed lead-out. The movable lead-out is connected with the static contact to improve the arc breaking effect. The fixed lead-out is connected with the terminal pin so that the terminal pin is still in a fixed position to ensure the normal use of the relay. At the same time, during the arc generation process, since it is an unknown number how much current the relay is set on the circuit when it is in use, the arc breaking distance is not certain. Therefore, when the auxiliary contact follows the moving contact to move, the moving distance of the auxiliary contact needs to be adjusted, so that it is suitable for circuits with different current sizes, so as to facilitate arc breaking for circuits with different currents.

[0016] Secondly, the auxiliary arc breaking mechanism is used. When the moving contact is working, the auxiliary arc breaking mechanism will still move to cooperate in the arc breaking process. Secondly, in the process of separation, the contacts may stick together. At this time, the matching plate on the auxiliary arc breaking mechanism (the front end of the matching plate is an inclined surface to reduce the contact area. When the force remains unchanged, the smaller the contact area, the greater the unit contact force) can play an auxiliary separation role to avoid serious adhesion. The moving contact and the auxiliary contact cannot be separated normally, and the matching plate will contact and rub with the surface of the moving contact and the auxiliary contact during operation. For this reason, if the moving contact and the auxiliary contact surface When the surface is uneven due to the arc, the matching plate can also be used to assist in grinding. Then, the moving control mechanism and the auxiliary arc breaking mechanism are used together. Since the moving contact and the auxiliary contact are ground on those surfaces, the actual sizes of the auxiliary contact and the moving contact will change over time. Therefore, after resetting, the moving contact and the auxiliary contact will change in size, and the contact effect between the moving contact and the auxiliary contact will decrease. Therefore, after resetting, the height of the auxiliary contact will change, thereby ensuring that the auxiliary contact and the moving contact can be in contact and fit, thereby increasing the service life of the relay and reducing the impact of the arc on the relay contact.

[0017] To summarize, the auxiliary contact lead-out mechanism of the relay is changed from the traditional fixed type to the semi-movable type. Under the premise of not changing the moving distance of the moving contact, the gap between the moving contact and the auxiliary contact is effectively increased. The higher the gap, the easier it is to break the arc. At the same time, the auxiliary arc breaking mechanism will also intervene in the work while the moving contact moves, which will improve the arc breaking effect for a second time. At the same time, the auxiliary arc breaking mechanism can also be used to process the contact surface and adjust the position of the auxiliary contact to ensure the use effect of the relay. The structure is simple, no additional power source is required, and all working states are consistent with the contact movement state. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 It is a schematic diagram of the main structure of the present invention;

[0020] Figure 2 It is a schematic diagram of the internal structure of the present invention;

[0021] Figure 3 It is a schematic diagram of the position structure of the moving contact and the auxiliary contact of the present invention;

[0022] Figure 4 It is a schematic diagram of the connection structure between the control bolt and the connecting frame of the present invention;

[0023] Figure 5 It is a schematic diagram of the connection structure between the auxiliary arc breaking mechanism and the movement control mechanism of the present invention;

[0024] Figure 6 It is a schematic diagram of the structure of the mobile control mechanism of the present invention;

[0025] Figure 7 It is a schematic diagram of the structure of the auxiliary arc breaking mechanism of the present invention;

[0026] Figure 8 It is a schematic diagram of the spiral guide track structure of the present invention.

[0027] Reference numerals:

[0028] 1. Contact lead-out mechanism; 11. Fixed lead-out plate; 12. Movable lead-out plate; 13. Connecting plate; 2. Auxiliary contact; 3. Moving contact; 4. Mobile control mechanism; 41. Connecting frame; 42. Control bolt; 43. Driving gear; 44. Rotating ring; 45. Driving screw rod; 46. Connecting ring; 47. Movable frame; 48. Spiral guide track; 5. Auxiliary arc breaking mechanism; 51. Matching plate; 52. Limiting block; 53. Resistance block; 54. Spring connecting block; 55. Matching rack. DETAILED DESCRIPTION

[0029] The technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0030] The components of the embodiments of the present invention generally described and shown in the drawings herein may be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention.

[0031] Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in the field without making any creative work shall fall within the scope of protection of the present invention.

[0032] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention 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, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0033] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0034] Combine the following Figures 1 to 8As shown, an embodiment of the present invention provides a high-voltage DC relay auxiliary contact 2 lead-out structure, including a housing and a moving contact 3 assembly, wherein an armature for driving the moving contact 3 assembly to move is arranged in the housing, and further comprising a contact lead-out mechanism 1 for connecting the auxiliary contact 2 to cooperate with the moving contact 3 to move, an auxiliary arc breaking mechanism 5 for assisting the moving contact 3 and the auxiliary contact 2 to break the arc, and a moving control mechanism 4 for controlling the movement of the contact lead-out mechanism 1, wherein the contact lead-out mechanism 1 comprises a fixed lead-out plate 11 and a movable lead-out plate 12, wherein the fixed lead-out plate 11 is connected to the pin, a connecting plate 13 is arranged between the fixed lead-out plate 11 and the movable lead-out plate 12, a plurality of auxiliary contacts 2 are arranged at the end of the movable lead-out plate 12, matching holes are provided at both ends of the movable lead-out plate 12, a plurality of moving contacts 3 corresponding to the auxiliary contact 2 are arranged below the auxiliary contact 2, and the lower ends of both ends of the connecting frame 41 are hollow.

[0035] During operation, as mentioned above, the contact lead-out mechanism 1 of the relay is changed from a traditional fixed type to a semi-movable type. Under the premise of not changing the moving distance of the moving contact 3, the gap between the moving contact 3 and the auxiliary contact 2 is effectively increased. The higher the gap, the easier it is to break the arc. At the same time, when the moving contact 3 moves, the auxiliary arc breaking mechanism 5 will also intervene in the work synchronously to improve the arc breaking effect for a second time. At the same time, the auxiliary arc breaking mechanism 5 can also be used to process the contact surface and adjust the position of the auxiliary contact 2 to ensure the use effect of the relay. The structure is simple, no additional power source is required, and all working states are consistent with the contact movement state.

[0036] Specifically, the mobile control mechanism 4 includes a connecting frame 41 and a driving screw 45. The connecting frame 41 passes through the shell and is placed in the matching hole opened by the movable lead-out plate 12. A control bolt 42 is arranged at the end of the connecting frame 41. The driving screw 45 is connected to the side wall of the moving contact 3 through a second connecting frame. The position of the driving screw 45 corresponds to the position of the matching hole. The driving screw 45 is externally threaded with a rotating ring 44. A connecting ring 46 is connected to the upper end of the rotating ring 44. A guide rail is connected above the connecting ring 46. A movable frame 47 is connected in the guide rail. The end of the movable frame 47 is connected to the movable lead-out plate 12. A first connecting frame is arranged outside the rotating ring 44. The first connecting frame is connected to the inner wall of the shell. A driving gear 43 is arranged below the rotating ring 44.

[0037] Specifically, the control bolt 42 is threadedly connected to the housing.

[0038] During operation, the position of the control bolt 42 can be adjusted.

[0039] Specifically, the guide rail is made of a plastic deformable material.

[0040] During operation, the guide rail can be deformed.

[0041] Specifically, the inner diameter of the connecting frame 41 is larger than the outer diameter of the driving screw rod 45 , and the lower ends of both sides of the connecting frame 41 are connected to the upper ends of the guide rails, and the inner diameter of the guide rails is larger than the outer diameter of the driving screw rod 45 .

[0042] Specifically, the connecting plate 13 is slidably connected to the fixed lead-out plate 11 .

[0043] Specifically, the auxiliary arc breaking mechanism 5 includes a plurality of matching plates 51, wherein the matching plates 51 are located below the auxiliary contact 2, and the plurality of matching plates 51 are connected by a third connecting frame, and matching racks 55 are provided at both ends of the third connecting frame, and the matching racks 55 are meshed and connected with the driving gear 43, and a resistance block 53 is provided at the end of the matching plate 51, and limiting blocks 52 are provided on both sides of the auxiliary contact 2, and the limiting block 52 is movably connected to the auxiliary contact 2 through a connecting rod, and a spring is provided between the connecting rod and the upper inner wall of the limiting block 52, and a spring connecting block 54 is provided on the outer side of the limiting block 52.

[0044] Specifically, the contact surface between the resisting block 53 and the limiting block 52 is an inclined surface.

[0045] Specifically, the matching plate 51 is made of a plastic surface friction material, so that the matching plate 51 has a certain friction coefficient.

[0046] Working principle: when the moving contact 3 and the auxiliary contact 2 need to be separated, the electromagnetic coil works at this time, driving the armature to move downward, and the armature moving downward drives the moving contact 3 to move. At the same time, during the movement of the armature, the movable frame 47 connected to the side thereof will be driven to move synchronously. When the movable frame 47 moves, it will drive the driving screw 45 connected thereto to connect. Since the driving screw 45 is threadedly connected to the rotating ring 44, and the rotating ring 44 is connected to the inner wall of the shell through the guide frame (the rotating ring 44 is rotatably connected to the guide frame, and the guide frame plays a role of limiting at this time), the driving screw 45 follows the static contact to move downward, which will drive the rotating ring 44 to rotate, and the upper surface of the rotating ring 44 is connected to the spiral guide track 48 through the connecting ring 46. For this reason, when the rotating ring 44 rotates, it will drive the spiral guide track 4 8 rotates synchronously, and the movable lead-out plate 12 is connected to the spiral guide track 48 through the movable frame 47 (it can be understood that the spiral guide track 48 is an external thread, and the movable frame 47 is an internal thread of the movable lead-out plate 12, but the contact point between the internal thread and the external thread is small). Therefore, when the threaded guide track rotates synchronously with the rotating ring 44, the position of the movable lead-out plate 12 will change synchronously (that is, the static contact point descends, the movable connecting plate 13 rises, and the static contact point finally moves more than twice the moving distance). Then, when the threaded guide track is used to drive the movable frame 47 to move, the pitch of the threaded guide track determines the moving distance of the movable lead-out plate 12. Therefore, after the relay is installed in a circuit, arc breaking pre-arc It is judged whether the movement brought by the threaded guide track can break the arc normally. If the movement is not enough, manually adjust the control bolt 42 to drive the connecting frame 41 to move down. Since the connecting frame 41 is connected to the end of the threaded guide track, the up and down movement of the connecting frame 41 will drive the threaded guide track to adjust the spacing, thereby regulating the movement amount. When the moving contact 3 moves, the driving gear 43 will rotate synchronously with the rotating ring 44. The driving gear 43 is connected to the matching rack 55. Therefore, the matching rack 55 will be affected by the driving gear 43 to move, and multiple matching racks 55 pass between each other, which will drive the matching plate 51 to move synchronously. The matching plate 51 will be inserted between the moving contact 3 and the auxiliary contact 2, thereby playing an auxiliary role. The mating plate 51 has the function of separation, and when the mating plate 51 moves between the moving contact 3 and the auxiliary contact 2, the upper and lower surfaces of the mating plate 51 will also contact the surfaces of the moving contact 3 and the auxiliary contact 2. At the same time, since the mating plate 51 is made of plastic material, it has certain elastic properties and the surface is friction. When the mating plate 51 is pushed and moved, it can play a role of friction grinding. After multiple friction grindings, a gap will appear between the auxiliary contact 2 and the static contact after resetting. At that time, after resetting, the abutment block 53 connected to the mating plate 51 will abut the inclined surface of the limiting block 52, causing the limiting block 52 to move. At this time, the limiting block 52 contacts the limit of the auxiliary contact 2, and the auxiliary contact 2 drops under the action of the internal spring to fill the gap between the auxiliary contact 2 and the moving contact 3.The auxiliary contact 2 can ensure contact with the moving contact 3.

[0047] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A high-voltage DC relay auxiliary contact lead-out structure, comprising a housing and a moving contact assembly, wherein an armature for driving the moving contact assembly to move is arranged in the housing, characterized in that; It also includes a contact lead-out mechanism (1) for connecting the auxiliary contact (2) so that it cooperates with the moving contact (3) in movement, an auxiliary arc breaking mechanism (5) for assisting the moving contact (3) and the auxiliary contact (2) in breaking the arc, and a moving control mechanism (4) for controlling the movement of the contact lead-out mechanism (1). The contact lead-out mechanism (1) includes a fixed lead-out plate (11) and a movable lead-out plate (12). The fixed lead-out plate (11) is connected to the plug pin. A connecting plate (13) is provided between the fixed lead-out plate (11) and the movable lead-out plate (12). A plurality of auxiliary contacts (2) are provided at the end of the movable lead-out plate (12). Matching holes are provided at both ends of the movable lead-out plate (12). A plurality of moving contacts (3) corresponding to the auxiliary contacts (2) are provided below the auxiliary contacts. The moving control mechanism (4) includes a connecting frame (41) and a driving screw (45). The connecting frame (41) passes through the shell and is placed in a matching hole opened in the movable lead-out plate (12). A control bolt (42) is arranged at the end of the connecting frame (41). The driving screw rod (45) is connected to the side wall of the moving contact (3) through a second connecting frame. The position of the driving screw rod (45) corresponds to the position of the matching hole. The driving screw rod (45) is externally threadedly connected to a rotating ring (44). The upper end of the rotating ring (44) is connected to a connecting ring (46). The upper part of the connecting ring (46) is connected to a guide track. A movable frame (47) is connected in the guide track. The end of the movable frame (47) is connected to the movable lead-out plate (12). A first connecting frame is arranged outside the rotating ring (44). The first connecting frame is connected to the inner wall of the shell. A driving gear (43) is arranged below the rotating ring (44). The lower ends of both ends of the connecting frame (41) are hollow.

2. A high voltage DC relay auxiliary contact lead-out structure according to claim 1, characterized in that: The control bolt (42) is threadedly connected to the housing.

3. The auxiliary contact lead-out structure of a high-voltage DC relay according to claim 1, characterized in that: The guide rail is made of a plastic deformable material.

4. The auxiliary contact lead-out structure of a high-voltage DC relay according to claim 1, characterized in that: The inner diameter of the connecting frame (41) is greater than the outer diameter of the driving screw rod (45), and the lower ends of both sides of the connecting frame (41) are connected to the upper ends of the guide rails, and the inner diameter of the guide rails is greater than the outer diameter of the driving screw rod (45).

5. The auxiliary contact lead-out structure of a high-voltage DC relay according to claim 1, characterized in that: The connecting plate (13) is slidably connected to the fixed lead-out plate (11).

6. A high voltage DC relay auxiliary contact lead-out structure according to claim 1, characterized in that: The auxiliary arc breaking mechanism (5) comprises a plurality of matching plates (51), wherein the matching plates (51) are located below the auxiliary contact (2), the plurality of matching plates (51) are connected via a third connecting frame, matching racks (55) are provided at both ends of the third connecting frame, the matching racks (55) are meshingly connected with the driving gear (43), a resisting block (53) is provided at the end of the matching plate (51), limiting blocks (52) are provided on both sides of the auxiliary contact (2), the limiting block (52) is movably connected to the auxiliary contact (2) via a connecting rod, a spring is provided between the connecting rod and the upper inner wall of the limiting block (52), and a spring connecting block (54) is provided on the outer side of the limiting block (52).

7. A high voltage DC relay auxiliary contact lead-out structure according to claim 6, characterized in that: The contact surface between the resistance block (53) and the limiting block (52) is an inclined surface.

8. The auxiliary contact lead-out structure of a high-voltage DC relay according to claim 6, characterized in that: The matching plate (51) is made of a plastic surface friction material.

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