High-voltage direct-current contactor and relay

Abstract

The utility model relates to the technical field of relays, in particular to a high-voltage direct-current contactor and a relay. The high-voltage direct-current contactor comprises a driving mechanism, a moving contact and an auxiliary moving reed. And the moving contact is arranged on the driving mechanism and moves upwards synchronously along with the driving mechanism. The driving mechanism drives the auxiliary moving reed and the moving contact to move upwards synchronously, so that the moving contact is in contact conduction with the static contact of the relay, the auxiliary moving reed is conducted with the auxiliary static contact of the relay, and the continuous conduction stability of the moving contact and the static contact is detected. The driving mechanism has an overtravel and is provided with a moving space, and the auxiliary movable contact spring is movably sleeved on a guide column in the moving space, so that the auxiliary movable contact spring in the overtravel process moves relatively on the guide column after being stressed, material deformation is reduced, the selection requirements for yield resistance and deformation resistance toughness of materials are reduced, and the service life of the auxiliary movable contact spring is prolonged. The material cost of the auxiliary movable contact spring is reduced, and the service life of a relay suitable for the auxiliary movable contact spring is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of relays, in particular to a high-voltage direct current contactor and a relay. Background Art

[0002] In order to reliably monitor the opening and closing status of the main contacts, a set of auxiliary contacts are usually designed in the contactor. The auxiliary moving spring moves with the active contact part, and most of the energy of the movement is absorbed by the collision between the moving and static contacts, resulting in a certain impact vibration between the contacts.

[0003] In the related art, the contactor often adopts a structure in which the middle of the auxiliary moving spring is relatively fixed and auxiliary moving springs are arranged at both ends, and then the reliable contact of the auxiliary contact is achieved through the elastic deformation of the auxiliary moving spring after being pressed.

[0004] However, contactors often need to operate frequently to prevent the auxiliary spring from breaking during the mechanical life of millions or tens of millions of times. Therefore, higher requirements are placed on the toughness, yield strength and other properties of the auxiliary spring material. However, such high requirements for material selection will lead to an increase in the cost of material selection, and there is no outstanding breakthrough in the service life of the auxiliary spring. Utility Model Content

[0005] The main purpose of the utility model is to provide a high-voltage DC contactor, aiming to solve the technical problem that it is difficult to balance the cost and service life of the auxiliary moving spring material selection of the existing contactor.

[0006] To achieve the above object, the high-voltage DC contactor proposed in the utility model is applied to a relay, and the high-voltage DC contactor comprises:

[0007] A driving mechanism, wherein the driving mechanism is provided with an activity space, wherein a guide column is provided in the activity space,

[0008] A moving contact, wherein the moving contact is arranged on the driving mechanism;

[0009] The auxiliary movable spring piece is movably arranged in the movable space and movably sleeved on the guide column.

[0010] Optionally, the driving mechanism is provided with a mounting member, and the guide column comprises:

[0011] a fixing section, the fixing section being arranged on the mounting member; and

[0012] The travel section is arranged at one end of the fixed section facing away from the fixed section, and the auxiliary movable spring piece is movably sleeved on the travel section.

[0013] Optionally, the auxiliary movable spring is provided with a through hole corresponding to the travel segment, the travel segment is penetrated in the through hole, and the outer diameter of the travel segment and the aperture of the through hole are both smaller than the outer diameter of the fixed segment.

[0014] Optionally, the mounting member is provided with a limiting groove, and the auxiliary movable spring piece is movably arranged in the limiting groove to limit the rotation of the auxiliary movable spring piece relative to the mounting member;

[0015] The bottom of the limiting groove is flush with or lower than the height of the connection between the fixing section and the travel section.

[0016] Optionally, the high-voltage DC contactor further comprises an elastic member, the elastic member is movably sleeved on the guide column, and both ends of the elastic member are limitedly located between the auxiliary movable spring sheet and the mounting member.

[0017] Optionally, the high-voltage DC contactor further comprises a locking member, which is detachably arranged at one end of the travel section away from the mounting member, and the auxiliary movable spring is movably located between the mounting member and the locking member.

[0018] Optionally, the high-voltage DC contactor further comprises at least one adjusting member, wherein the adjusting member is sleeved on the travel section, and the adjusting member is located between the locking member and the auxiliary movable spring.

[0019] Optionally, at least one retaining wall is further provided on the driving mechanism, and the retaining wall is arranged adjacent to both ends of the auxiliary movable spring, and the retaining wall is used to increase the creepage distance of the mounting member.

[0020] Optionally, the auxiliary moving spring comprises a conductive plate and two auxiliary moving contacts, the two auxiliary moving contacts are arranged at two ends of the conductive plate, and the auxiliary moving contacts and the conductive plate are both conductors.

[0021] The utility model also provides a relay, which comprises:

[0022] A housing, wherein the housing is provided with a cavity;

[0023] an electric contact group, the electric contact group is arranged in the cavity, and the electric contact group includes an auxiliary static contact point and a static contact head; and

[0024] As described above, the high-voltage DC contactor is arranged in the cavity, and the driving mechanism of the high-voltage DC contactor drives the moving contact and the auxiliary moving spring to move, so that the moving contact is electrically connected to the static contact, and the auxiliary moving spring is electrically connected to the auxiliary static contact.

[0025] The high-voltage DC contactor of the technical solution of the utility model is applied to a relay, and the high-voltage DC contactor includes a driving mechanism, a moving contact and an auxiliary moving spring. The moving contact is arranged on the driving mechanism and moves upward synchronously with the driving mechanism. The driving mechanism drives the auxiliary moving spring to move upward synchronously with the moving contact, so that the moving contact is connected with the static contact of the relay, and the auxiliary moving spring is connected with the auxiliary static contact of the relay, so as to detect the continuous conduction stability of the moving contact and the static contact. The driving mechanism has an overtravel and is provided with an activity space, and the auxiliary moving spring is movably sleeved on a guide column in the activity space, so that the auxiliary moving spring moves relatively on the guide column after being subjected to force during the overtravel process, thereby reducing material deformation, thereby reducing the selection requirements for the material's anti-yield and anti-deformation toughness, reducing the material cost of the auxiliary moving spring, and extending the service life of the relay to which it is applicable. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0027] Figure 1 It is a three-dimensional structural schematic diagram of an embodiment of the high-voltage DC contactor of the utility model;

[0028] Figure 2 It is a cross-sectional structural diagram of an embodiment of the high-voltage DC contactor of the utility model;

[0029] Figure 3 This is a schematic diagram of the assembly structure of the mounting member and the guide column of an embodiment of the high-voltage DC contactor of the utility model;

[0030] Figure 4 The utility model is a schematic diagram of the three-dimensional structure of an auxiliary movable spring piece of an embodiment of a high-voltage DC contactor.

[0031] Description of Figure Numbers:

[0032]

[0033] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0035] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0036] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" 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 an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0037] In addition, in the present utility model, descriptions such as "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing in the full text is to include three parallel solutions. Taking "A and / or B as an example", it includes solution A, or solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0038] In order to reliably monitor the opening and closing status of the main contacts, a set of auxiliary contacts are usually designed in the contactor. The auxiliary moving spring moves with the active contact part, and most of the energy of the movement is absorbed by the collision between the moving and static contacts, resulting in a certain impact vibration between the contacts.

[0039] In the related art, the contactor often adopts a structure in which the middle of the auxiliary moving spring is relatively fixed and auxiliary moving springs are arranged at both ends, and then the reliable contact of the auxiliary contact is achieved through the elastic deformation of the auxiliary moving spring after being pressed.

[0040] However, contactors often need to operate frequently to prevent the auxiliary spring from breaking during the mechanical life of millions or tens of millions of times. Therefore, higher requirements are placed on the toughness, yield strength and other properties of the auxiliary spring material. However, such high requirements for material selection will lead to an increase in the cost of material selection, and there is no outstanding breakthrough in the service life of the auxiliary spring.

[0041] The utility model provides a high-voltage DC contactor 100, which is applied to a relay.

[0042] Reference Figures 1 to 4 , Figure 1 It is a three-dimensional structural schematic diagram of an embodiment of a high-voltage DC contactor 100 of the utility model; Figure 2 It is a cross-sectional structural diagram of an embodiment of a high-voltage DC contactor 100 of the utility model;

[0043] Figure 3 This is a schematic diagram of the assembly structure of the mounting member 12 and the guide column 30 of an embodiment of the high-voltage DC contactor 100 of the utility model; Figure 4 It is a schematic diagram of the three-dimensional structure of the auxiliary movable spring piece 50 of an embodiment of the high-voltage DC contactor 100 of the utility model.

[0044] In the embodiment of the utility model, the high voltage DC contactor 100 includes a driving mechanism 10, a moving contact 13 and an auxiliary moving spring 50. Figures 1 to 3 As shown, the driving mechanism 10 is provided with an activity space 10A, a guide column 30 is provided in the activity space 10A, and the moving contact 13 is provided on the driving mechanism 10. The auxiliary moving spring 50 is movably provided in the activity space 10A and movably sleeved on the guide column 30.

[0045] The high-voltage DC contactor 100 of the technical solution of the utility model is applied to a relay, and the high-voltage DC contactor 100 includes a driving mechanism 10, a moving contact 13, and an auxiliary moving spring 50. The moving contact 13 is arranged on the driving mechanism 10, and moves upward synchronously with the driving mechanism 10. The relay is provided with a static contact and an auxiliary static contact arranged statically relative to the high-voltage DC contactor 100. The driving mechanism 10 drives the auxiliary moving spring 50 to move upward synchronously with the moving contact 13, so that the moving contact 13 is in contact with the static contact and the auxiliary moving spring 50 is in conduction with the auxiliary static contact, so that the continuous conduction stability of the moving contact 13 and the static contact is detected by the conduction condition of the auxiliary moving spring 50 and the auxiliary static contact. The driving mechanism 10 has an overtravel and is provided with an active space 10A. The auxiliary movable spring 50 is movably sleeved on the guide column 30 in the active space 10A, so that the auxiliary movable spring 50 moves relatively on the guide column 30 after being subjected to force during the overtravel process, thereby reducing the material deformation of the auxiliary movable spring 50, thereby reducing the requirements for the material's anti-yield property and anti-deformation toughness, reducing the material cost of the auxiliary movable spring 50, and extending the service life of the relay to which it is applicable.

[0046] It is understandable that the high-voltage DC contactor 100 is also provided with a moving iron core, a static iron core and a magnetic circuit system. When the magnetic circuit system is powered on, the moving iron core moves upward relative to the static iron core, and moves downward relative to the static iron core after power is cut off. When the magnetic circuit system is powered on, an electromagnetic driving force is generated so that the moving iron core drives the high-voltage DC contactor 100 upward as a whole, so that the moving contact 13 is in contact with the static contact and the auxiliary moving spring 50 is in contact with the auxiliary static contact. After the auxiliary moving spring 50 abuts against the auxiliary static contact and is in conduction, a conduction signal is fed back to the control unit of the relay. The continuous conduction between the auxiliary moving spring 50 and the auxiliary static contact can be used to detect the continuous conduction between the moving contact 13 and the static contact.

[0047] The upward overtravel of the driving mechanism 10 will increase the abutment strength between the auxiliary movable spring 50 and the auxiliary static contact, and improve the abutment reliability between the two, so as to improve the detection reliability. However, the auxiliary movable spring 50 used in the utility model is not used to produce the overtravel abutment through deformation, but to resist the overtravel pressure through relative movement within a certain range, while ensuring the continuous conduction between the auxiliary movable spring 50 and the auxiliary static contact, except in the event of a failure of the auxiliary movable spring 50 and the auxiliary static contact.

[0048] Furthermore, the guide column 30 is a straight column, and the auxiliary movable spring 50 reciprocates along the extension path of the guide column 30. The movement direction of the driving mechanism 10 is limited to the up and down direction, and the auxiliary movable spring 50 moves relative to the guide column 30 in the up and down direction. Specifically, when the driving mechanism 10 moves upward, the auxiliary movable spring 50 moves upward synchronously. During the over-travel movement, the driving mechanism 10 continues to move upward, and the auxiliary movable spring 50 is pushed by the auxiliary static contact and generates relative movement. At this time, the guide column 30 moves upward with the driving mechanism 10, and the auxiliary movable spring 50 is in a downward state relative to the guide column 30. By replacing the push deformation through movement, the material selection requirements are reduced while ensuring the abutment stability.

[0049] Optionally, the driving mechanism 10 is provided with a mounting member 12, and the guide column 30 includes a fixed section 31 and a travel section 33, the fixed section 31 is provided on the mounting member 12, the travel section 33 is provided at one end of the fixed section 31 facing away from the fixed section 31, and the auxiliary movable spring 50 is movably sleeved on the travel section 33.

[0050] In this embodiment, the driving mechanism 10 includes a driving frame 11 and a mounting member 12, the moving contact 13 is arranged on the driving frame 11, the bottom of the mounting frame is connected to the moving iron core, the mounting member 12 is arranged at the top position of the driving frame 11 facing the static contact, and the guide column 30 is arranged at one end of the mounting member 12 facing away from the driving frame 11. The guide column 30 includes a fixed section 31 connected to the mounting member 12 at one end and a travel section 33 connected to the auxiliary moving spring 50 at one end. The auxiliary moving spring 50 is movably sleeved in the travel section 33, and the relative movement stroke of the auxiliary moving spring 50 in the up-down direction is less than the length of the travel section 33, so as to limit the travel of the auxiliary moving spring 50, so that it can adapt to the movement of the over-travel without generating a large movement, thereby ensuring the stability of the connection and conduction between the auxiliary static contact and the auxiliary moving spring 50.

[0051] Optionally, the auxiliary movable spring 50 is provided with a through hole 50A corresponding to the travel section 33 , the travel section 33 is penetrated in the through hole 50A, and the outer diameter of the travel section 33 and the aperture of the through hole 50A are both smaller than the outer diameter of the fixed section 31 .

[0052] In this embodiment, a through hole 50A is provided in the middle of the auxiliary movable spring 50, and the stroke section 33 is correspondingly penetrated inside the through hole 50A. The outer diameter of the stroke section 33 and the aperture of the through hole 50A are both smaller than the outer diameter of the fixed section 31, and the guide column 30 limits the auxiliary movable spring 50 at the end of the stroke section 33 so that it will not separate from the stroke section 33, thereby improving the setting stability of the auxiliary movable spring 50.

[0053] Optionally, the mounting member 12 is provided with a limiting groove 12A, and the auxiliary movable spring 50 is movably arranged in the limiting groove 12A to limit the rotation of the auxiliary movable spring 50 relative to the mounting member 12. The bottom of the limiting groove 12A is flush with or lower than the height of the connection between the fixed section 31 and the travel section 33.

[0054] In this embodiment, the extension direction of both ends of the auxiliary moving spring piece 50 is perpendicularly arranged to cross the extension direction of both ends of the moving contact 13 to avoid circuit abnormality caused by creepage and electrical short circuit. The mounting member 12 is provided with a limit groove 12A, and the bottom of the limit groove 12A is flush with or lower than the height of the connection between the fixed section 31 and the travel section 33, so that the movement of the auxiliary moving spring piece 50 in the travel section 33 will not be hindered by the limit groove 12A.

[0055] An annular limit plate is provided on the side of the mounting member 12 facing away from the driving frame 11, and the guide column 30 is arranged inside the annular limit plate. The annular limit plate is provided with two limit grooves 12A at the edge corresponding to the extension direction of the auxiliary movable spring piece 50. The setting of the two limit grooves 12A limits the movement of the limit grooves 12A along the horizontal plane to limit the rotation of the auxiliary movable spring piece 50 relative to the mounting member 12, improve the cross-setting stability of the extension direction of the auxiliary movable spring piece 50 and the two ends of the movable contact 13, and improve the reliability of the connection and conduction between the auxiliary movable spring piece 50 and the auxiliary static contact.

[0056] Optionally, the high-voltage DC contactor 100 further includes an elastic member 60 , which is movably sleeved on the guide column 30 , and both ends of the elastic member 60 are limited between the auxiliary movable spring 50 and the mounting member 12 .

[0057] In this embodiment, on the basis of the auxiliary movable spring 50 performing relative up and down movement in the stroke section 33 of the guide column 30, the high-voltage DC contactor 100 is further provided with an elastic member 60, which is sleeved on the guide column 30, and the two ends of the elastic member 60 respectively abut the bottom of the mounting member 12 and the auxiliary movable spring 50, and the auxiliary static contact pushes the two ends of the auxiliary movable spring 50 on the side facing away from the elastic member 60. Under the setting of the elastic member 60, the relative downward movement process of the auxiliary movable spring 50 can be smooth; when the driving mechanism 10 moves downward as a whole, the auxiliary static contact releases the auxiliary movable spring 50, and the elastic member 60 can push the auxiliary movable spring 50 to return relative to the guide column 30 to prepare for the next abutment. The setting of the elastic member 60 can not only improve the balance of the auxiliary movable spring 50 moving up and down, but also improve the stability and smoothness.

[0058] It is understandable that the elastic member 60 may be a spring or a compression spring, or an elastic structure such as a spring.

[0059] Optionally, the high-voltage DC contactor 100 further includes a locking member 70 , which is detachably disposed at one end of the travel section 33 away from the mounting member 12 , and the auxiliary movable spring 50 is movably located between the mounting member 12 and the locking member 70 .

[0060] In this embodiment, the high-voltage DC contactor 100 further includes a locking member 70, which is detachably disposed at one end of the travel segment 33 away from the mounting member 12, and the maximum travel of the auxiliary movable spring 50 is limited between the fixed segment 31 and the locking member 70. A locking hole 30A is disposed at one end of the travel segment 33 away from the fixed segment 31, and the locking member 70 is configured as a pin or a bolt to block the auxiliary movable spring 50, so as to limit the auxiliary movable spring 50 on the travel segment 33, so that the auxiliary movable spring 50 will not be separated from the guide column 30 or the travel segment 33, thereby improving the setting stability of the auxiliary movable spring 50.

[0061] Optionally, the high-voltage DC contactor 100 further includes at least one adjusting member 80 , which is sleeved on the travel section 33 and located between the locking member 70 and the auxiliary movable spring 50 .

[0062] In this embodiment, the adjusting member 80 is located between the locking member 70 and the auxiliary movable spring 50, and is used to bear the pushing pressure of the locking member 70, so that the auxiliary movable spring 50 and the adjusting member 80 are pressed toward the side of the locking member 70 to abut against each other, thereby increasing the force contact area of ​​the auxiliary movable spring 50 under the downward pressure, improving the movement balance of the auxiliary movable spring 50, reducing the pressure of the auxiliary movable spring 50, and extending the service life of the auxiliary movable spring 50.

[0063] In one embodiment, the high-voltage DC contactor 100 may be provided with a plurality of adjusting members 80 , and the adjusting members 80 may be spring washers to provide buffering and pressure balancing effects.

[0064] Optionally, at least one retaining wall 90 is further provided on the driving mechanism 10 . The retaining wall 90 is provided adjacent to both ends of the auxiliary movable spring 50 . The retaining wall 90 is used to increase the creepage distance of the mounting member 12 .

[0065] In this embodiment, the retaining wall 90 is arranged on the mounting member 12 and is arranged following the extension direction of the auxiliary moving spring piece 50. The retaining wall 90 is made of insulating material to increase the creepage distance of the mounting member 12, avoid creepage conduction between the auxiliary moving spring piece 50 and the moving contact 13, avoid circuit failure, and improve the safety of electrical connection.

[0066] Furthermore, the mounting member 12, the limiting plate and the retaining wall 90 are all made of insulating materials such as plastic or rubber. The mounting member 12, the limiting plate and the retaining wall 90 are integrally injection molded and can also be detachably connected. The base plate of the mounting member 12 is detachably connected or riveted to the driving member, and the assembly is stable.

[0067] Combined with reference Figure 4 As shown, optionally, the auxiliary movable spring 50 includes a conductive plate 51 and two auxiliary movable contacts 53. The two auxiliary movable contacts 53 are disposed at both ends of the conductive plate 51. Both the auxiliary movable contacts 53 and the conductive plate 51 are conductors.

[0068] In this embodiment, the auxiliary moving spring 50 includes a conductive plate 51 and two auxiliary moving contacts 53. The auxiliary moving contact 53 and the conductive plate 51 are both conductors and the two auxiliary moving contacts 53 are detachably arranged at both ends of the conductive plate 51. Two auxiliary static contacts are provided. One auxiliary static contact is electrically connected to an auxiliary moving contact 53. The two auxiliary moving contacts 53 are electrically connected through the conductive plate 51 to form a closed circuit, so as to judge the electrical conduction stability of the moving contact 13 and the static contact by the closed stability of the powered closed circuit.

[0069] The utility model also proposes a relay, which includes a housing, a contact group and a high-voltage DC contactor 100. The specific structure of the high-voltage DC contactor 100 refers to the above embodiment. Since the present relay adopts all the technical solutions of all the above embodiments, it at least has all the beneficial effects brought by the technical solutions of the above embodiments, which will not be repeated here. Among them, the housing is provided with a cavity, and the high-voltage DC contactor 100 and the contact group are arranged in the cavity. The contact group includes an auxiliary static contact and a static contact. The driving mechanism 10 of the high-voltage DC contactor 100 drives the moving contact 13 and the auxiliary moving spring 50 to move, so that the moving contact 13 is electrically connected to the static contact, and the auxiliary moving spring 50 is electrically connected to the auxiliary static contact.

[0070] In this embodiment, the auxiliary movable spring 50 used in the high-voltage DC contactor 100 does not produce an overtravel abutment by deformation, but resists the overtravel pressure by relative movement within a certain range, while ensuring continuous conduction between the auxiliary movable spring 50 and the auxiliary static contact. After the auxiliary movable spring 50 abuts against the auxiliary static contact and conducts, a conduction signal is fed back to the control unit of the relay, and the continuous conduction between the auxiliary movable spring 50 and the auxiliary static contact can be used to detect the continuous conduction between the movable contact 13 and the static contact.

[0071] The high-voltage DC contactor 100 is further provided with a moving iron core, a stationary iron core, a driving spring 14 and a magnetic circuit system. When the magnetic circuit system is powered on, the moving iron core moves upward relative to the stationary iron core, and moves downward relative to the stationary iron core after power is cut off.

[0072] The relay has two states, on and off. When the magnetic circuit system is energized, an electromagnetic driving force is generated to cause the moving iron core to drive the high-voltage DC contactor 100 upward as a whole, so that the moving contact 13 is in contact with the static contact and the auxiliary moving spring 50 is in contact with the auxiliary static contact, so that the relay is in the on state, and the drive spring 14 is compressed.

[0073] When the magnetic circuit system is powered off, the drive spring 14 drives the drive mechanism 10 to move downward as a whole, and the auxiliary static contact releases the auxiliary moving spring 50. The elastic member 60 can push the auxiliary moving spring 50 to return relative to the guide column 30 to prepare for the next abutment. At this time, the relay is in a disconnected state.

[0074] The overtravel upward movement of the driving mechanism 10 will increase the abutment strength between the auxiliary movable spring 50 and the auxiliary static contact, and improve the abutment reliability between the two, so as to improve the detection reliability, except for the failure of the auxiliary movable spring 50 and the auxiliary static contact.

[0075] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A high voltage DC contactor, characterized in that: The high voltage DC contactor comprises: A driving mechanism, wherein the driving mechanism is provided with an activity space, and a guide column is provided in the activity space; A moving contact, wherein the moving contact is arranged on the driving mechanism; The auxiliary movable spring piece is movably arranged in the movable space and movably sleeved on the guide column.

2. The high voltage DC contactor according to claim 1, characterized in that: The driving mechanism is provided with a mounting member, and the guide column comprises: a fixing section, the fixing section being arranged on the mounting member; and The travel section is arranged at one end of the fixed section facing away from the fixed section, and the auxiliary movable spring piece is movably sleeved on the travel section.

3. The high voltage DC contactor according to claim 2, characterized in that: The auxiliary movable spring is provided with a through hole corresponding to the travel section, the travel section is penetrated in the through hole, and the outer diameter of the travel section and the aperture of the through hole are both smaller than the outer diameter of the fixed section.

4. The high voltage DC contactor according to claim 2, characterized in that: The mounting member is provided with a limiting groove, and the auxiliary movable spring piece is movably arranged in the limiting groove to limit the rotation of the auxiliary movable spring piece relative to the mounting member; The bottom of the limiting groove is flush with or lower than the height of the connection between the fixing section and the travel section.

5. The high voltage DC contactor according to claim 2, characterized in that: The high-voltage DC contactor further comprises an elastic member, which is movably sleeved on the guide column, and both ends of the elastic member are limitedly located between the auxiliary movable spring sheet and the mounting member.

6. The high voltage DC contactor according to claim 2, characterized in that: The high-voltage DC contactor further comprises a locking member, which is detachably arranged at one end of the travel section away from the mounting member, and the auxiliary movable spring is movably located between the mounting member and the locking member.

7. The high voltage DC contactor according to claim 6, characterized in that: The high-voltage DC contactor further comprises at least one adjusting member, which is sleeved on the travel section and is located between the locking member and the auxiliary movable spring.

8. The high voltage DC contactor according to claim 2, characterized in that: The driving mechanism is also provided with at least one retaining wall, which is arranged adjacent to both ends of the auxiliary moving spring and is used to increase the creepage distance of the mounting member.

9. The high voltage DC contactor according to claim 1, characterized in that: The auxiliary moving spring comprises a conductive plate and two auxiliary moving contacts, the two auxiliary moving contacts are arranged at two ends of the conductive plate, and both the auxiliary moving contacts and the conductive plate are conductors.

10. A relay, characterized in that: The relay comprises: A housing, wherein the housing is provided with a cavity; an electric contact group, the electric contact group is arranged in the cavity, and the electric contact group includes an auxiliary static contact point and a static contact head; and The high-voltage DC contactor according to any one of claims 1 to 9, wherein the high-voltage DC contactor is disposed in the cavity, and the driving mechanism of the high-voltage DC contactor drives the moving contact and the auxiliary moving spring to move so that the moving contact is electrically connected to the static contact, and the auxiliary moving spring is electrically connected to the auxiliary static contact.

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