Contactor

Abstract

The utility model relates to the technical field of contactors, in particular to a contactor. The contactor comprises a shell provided with a containing cavity, and an auxiliary static contact, a supporting mechanism, an auxiliary movable contact piece and an elastic piece which are arranged in the containing cavity. The supporting mechanism is provided with a stroke space, and the auxiliary moving contact is movably arranged in the stroke space and is provided with a clamping part. The elastic piece is arranged in the stroke space and connected with the clamping portion. And the supporting mechanism drives the auxiliary movable contact piece to move upwards, so that the auxiliary movable contact piece is conducted with the auxiliary static contact, and the continuous conduction stability of the movable contact and the static contact of the contactor is detected. The elastic piece and the auxiliary movable contact piece are matched in a clamping mode so that the auxiliary movable contact piece can move downwards relatively after being stressed and is connected with the elastic piece in a pressing mode, material deformation of the auxiliary movable contact piece can be reduced through movement of the auxiliary movable contact piece, the selection requirements for yield resistance and deformation resistance toughness of materials of the auxiliary movable contact piece are lowered, the service life of the auxiliary movable contact piece is prolonged, and the material selection cost of the auxiliary movable contact piece is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of contactors, in particular to a contactor. Background Art

[0002] In order to ensure the reliability of contactor products, a group of auxiliary moving contacts are often set in contactor products to detect the open and closed state of the main contacts. The auxiliary moving contact moves with the moving 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 contact piece is relatively fixed and auxiliary moving contact pieces are arranged at both ends, and then the elastic deformation of the auxiliary moving contact piece after being pressed is used to achieve reliable contact of the auxiliary moving contact point.

[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 moving contact material. However, such high requirements for material selection will lead to increased material selection costs, and there is no outstanding breakthrough in the service life of the auxiliary moving contact. Utility Model Content

[0005] The main purpose of the utility model is to provide a contactor, aiming to solve the technical problem of the difficulty in balancing the cost and service life of the auxiliary moving contact piece material selection of the existing contactor.

[0006] In order to achieve the above-mentioned purpose, the contactor proposed by the utility model comprises:

[0007] A housing, wherein the housing is provided with a cavity, and an auxiliary static contact is provided at the top of the cavity;

[0008] A supporting mechanism, the supporting mechanism is arranged in the cavity and is provided with a travel space;

[0009] An auxiliary movable contact piece, the auxiliary movable contact piece is arranged in the travel space and movably connected to the supporting mechanism, and the auxiliary movable contact piece is provided with a locking portion; and

[0010] An elastic member is arranged in the travel space, the elastic member is connected to the locking portion, and the supporting mechanism drives the auxiliary moving contact piece to move so as to be electrically connected or away from the auxiliary static contact.

[0011] Optionally, two inner walls facing the travel space are provided with two positioning platforms, and two positioning platform grooves are formed on two sides of the positioning platform;

[0012] The clamping portion is clamped in a plurality of the clamping slots to fix the auxiliary movable contact piece.

[0013] Optionally, the elastic member is located between the two positioning platforms;

[0014] One end of the elastic member is clamped on the clamping portion, and the other end is fixed on the bottom wall of the travel space.

[0015] Optionally, the locking portion is integrally formed on the auxiliary movable contact piece;

[0016] And / or, the support mechanism is provided with a boss, the boss is located between the two positioning platforms, and one end of the elastic member away from the auxiliary movable contact piece is sleeved on the boss;

[0017] And / or, the locking portion is configured as a plurality of locking teeth arranged at intervals, and the two locking teeth located on the same side of the auxiliary moving contact piece are respectively engaged in two locking platform grooves on both sides of a locking platform, and the plurality of locking teeth are arranged around the outer periphery of the elastic member.

[0018] Optionally, the supporting mechanism comprises:

[0019] Auxiliary base; and

[0020] The limit frame is arranged on the auxiliary base and is enclosed with the auxiliary base to form the travel space. The travel space has a through opening along the length extension direction of the auxiliary moving contact piece, and the two ends of the auxiliary moving contact piece extend out of the travel space through the through opening respectively.

[0021] Optionally, the limiting frame includes:

[0022] A bearing plate, the bearing plate is arranged in a ring shape, and two mounting grooves are provided on two opposite sides of the bearing plate; and

[0023] The buckle plate is U-shaped, and the two ends of the U-shaped buckle plate are respectively arranged in the two installation grooves. The buckle plate, the bearing plate and the auxiliary base enclose the travel space.

[0024] Optionally, undercuts are provided on both side edges of the snap-fit ​​plate, and buckles are correspondingly provided on the groove wall of the installation groove, and the undercuts are snap-fitted with the buckles.

[0025] Optionally, at least one insulating wall is further provided on the support mechanism, and the insulating walls are arranged at intervals around the outer periphery of the travel space to increase the creepage distance of the support mechanism.

[0026] Optionally, the insulating wall comprises:

[0027] A first enclosure, the first enclosure being spaced around the outer circumference of the travel space; and

[0028] The second enclosure is spaced around the outer circumference of the first enclosure, and the length direction of the second enclosure is parallel to the length extension direction of the auxiliary movable contact piece.

[0029] Optionally, the contactor further comprises:

[0030] a first magnetic conductive block, the first magnetic conductive block being arranged on a side of the supporting mechanism facing away from the auxiliary movable contact piece; and

[0031] An assembly frame is arranged on a side of the first magnetic conductive block facing away from the supporting mechanism, and the assembly frame, the first magnetic conductive block and the supporting mechanism are fixed by riveting.

[0032] The contactor of the technical solution of the utility model includes a shell provided with a cavity and an auxiliary static contact, a supporting mechanism, an auxiliary moving contact piece and an elastic member arranged in the cavity. The supporting mechanism is provided with a travel space, and the auxiliary moving contact piece can be movably arranged in the travel space and the auxiliary moving contact piece is provided with a locking portion. The elastic member is arranged in the travel space, and the elastic member is connected to the locking portion. The supporting mechanism drives the auxiliary moving contact piece to move upward, so that the auxiliary moving contact piece is connected with the auxiliary static contact, so as to detect the continuous conduction stability of the moving contact and the static contact of the contactor. The elastic member and the auxiliary moving contact piece are clamped together so that the auxiliary moving contact piece moves downward relatively after being subjected to force and presses the elastic member. The movement of the auxiliary moving contact piece can reduce its material deformation, reduce its selection requirements for the material's anti-yield and anti-deformation toughness, extend the service life of the auxiliary moving contact piece, and reduce the material selection cost of the auxiliary moving contact piece. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] 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.

[0034] Figure 1 This is a schematic diagram of the three-dimensional structure of an embodiment of a contactor of the utility model;

[0035] Figure 2 This is a schematic diagram of the assembly structure of the support mechanism of an embodiment of the contactor of the utility model;

[0036] Figure 3 This is a schematic diagram of the three-dimensional structure of another embodiment of the contactor of the utility model;

[0037] Figure 4 This is a schematic diagram of the support mechanism assembly structure of another embodiment of the contactor of the utility model;

[0038] Figure 5 It is a schematic diagram of the front and back structures of an auxiliary moving contact piece of an embodiment of a contactor of the utility model;

[0039] Figure 6 It is a structural schematic diagram of an assembly frame of an embodiment of a contactor of the utility model;

[0040] Figure 7 This is a schematic structural diagram of a second magnetic conductive block of an embodiment of a contactor of the utility model;

[0041] Figure 8 The diagram is a schematic diagram of the front and back structures of a moving contact of an embodiment of a contactor of the utility model.

[0042] Description of Figure Numbers:

[0043] Label name Label name Label name 10 Support mechanism 30 Auxiliary moving contact 50 Insulation Wall 10A Travel space 31 Ontology 51 The first enclosure 11 Auxiliary base 32 Positioning Department 52 Second enclosure 12 Limiting frame 321 Positioning teeth 61 The first magnetic block 121 Loading plate 33 Auxiliary moving contact 62 The second magnetic block 122 Buckle plate 40 Elastic parts 62A Grooves 1221 Undercut 12A Mounting slot 63 Drive spring 123 Seat table 12B Card slot 65 Moving contact 124 Boss 13A Push cavity 651 Fixed platform 13 Mounting rack 13B Side hole 100 Contactor

[0044] 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

[0045] 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.

[0046] 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.

[0047] 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.

[0048] 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.

[0049] In order to ensure the reliability of high-voltage DC contactor products, a group of auxiliary moving contacts are often set in the contactor products to detect the open and closed state of the main contacts. The auxiliary moving contact moves with the moving 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.

[0050] In the related art, the contactor often adopts a structure in which the middle of the auxiliary moving contact piece is relatively fixed and the auxiliary moving contact pieces are arranged at both ends, and then the auxiliary moving contact piece is used to achieve reliable contact of the auxiliary moving contact through the elastic deformation after being pressed. However, the contactor often needs to be operated frequently to prevent the auxiliary spring piece from breaking during the mechanical life of millions or tens of millions of times. Therefore, higher requirements are put forward for the toughness, yield strength and other properties of the auxiliary moving contact piece 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 length of the service life of the auxiliary moving contact piece.

[0051] The utility model provides a contactor 100, which is mainly used in high-voltage direct current contactors.

[0052] Reference Figures 1 to 8 , Figure 1 It is a three-dimensional structural schematic diagram of an embodiment of a contactor 100 of the utility model; Figure 2 This is a schematic diagram of the assembly structure of the support mechanism 10 of an embodiment of the contactor 100 of the utility model; Figure 3 This is a schematic diagram of the three-dimensional structure of another embodiment of the contactor 100 of the present utility model; Figure 4 This is a schematic diagram of the assembly structure of the support mechanism 10 of another embodiment of the contactor 100 of the utility model; Figure 5 It is a schematic diagram of the front and back structures of the auxiliary moving contact piece 30 of an embodiment of the contactor 100 of the utility model; Figure 6 This is a schematic structural diagram of an assembly frame 13 of an embodiment of a contactor 100 of the utility model; Figure 7This is a schematic structural diagram of the second magnetic conductive block 62 of an embodiment of the contactor 100 of the utility model; Figure 8 Schematic diagram of the front and back structures of the moving contact 65 of an embodiment of the contactor 100 of the present invention.

[0053] In the embodiment of the utility model, the contactor 100 includes a housing (not shown), a support mechanism 10, an auxiliary moving contact piece 30 and an elastic member 40. The housing is provided with a cavity, and an auxiliary static contact point (not shown) is provided on the top of the cavity. The support mechanism 10 is provided in the cavity and has a travel space 10A, such as Figures 1 to 2 As shown, the auxiliary movable contact piece 30 is disposed in the travel space 10A and movably connected to the support mechanism 10, the auxiliary movable contact piece 30 is provided with a locking portion 32, and the elastic member 40 is disposed in the travel space 10A and connected to the locking portion 32. The support mechanism 10 drives the auxiliary movable contact piece 30 to move to electrically conduct or move away from the auxiliary static contact.

[0054] The contactor 100 of the technical solution of the utility model includes a shell provided with a cavity and an auxiliary static contact arranged in the cavity, a support mechanism 10, an auxiliary moving contact piece 30 and an elastic member 40. The support mechanism 10 is provided with a travel space 10A, the auxiliary moving contact piece 30 is movably arranged in the travel space 10A, and the auxiliary moving contact piece 30 is provided with a locking portion 32. The elastic member 40 is arranged in the travel space 10A, and the elastic member 40 is connected to the locking portion 32. The contactor 100 also includes a moving contact 65 and a static contact (not shown in the figure), and the support mechanism 10 drives the auxiliary moving contact piece 30 to move upward, so that the auxiliary moving contact piece 30 is connected with the auxiliary static contact, thereby detecting the continuous conduction stability of the moving contact 65 and the static contact of the contactor 100.

[0055] The elastic member 40 and the auxiliary moving contact piece 30 are clipped together so that the auxiliary moving contact piece 30 moves downward relatively and presses the elastic member 40 after being subjected to force. The overall movement of the auxiliary moving contact piece 30 can reduce its material deformation, reduce its requirements for the material's anti-yield property and anti-deformation toughness, extend the service life of the auxiliary moving contact piece, and reduce the material selection cost of the auxiliary moving contact piece.

[0056] Furthermore, the static contact is arranged in the cavity and located at the top of the support mechanism 10; the moving contact 65 is arranged in the limit frame 13 described below at the bottom of the support mechanism 10, and the moving contact 65 is arranged at a distance from the auxiliary moving contact piece 30. The movement of the limit frame 13 drives the moving contact 65 of the support mechanism 10 to move, so that the moving contact 65 is electrically conductive or away from the static contact, and the auxiliary moving contact piece 30 is electrically conductive with the auxiliary static contact point to detect the continuous conductive stability of the moving contact 65 and the static contact.

[0057] It should be noted that the continuous conduction between the auxiliary moving contact piece 30 and the auxiliary static contact can be used to detect the continuous conduction between the moving contact 65 and the static contact. The auxiliary moving contact piece 30 used in the contactor 100 is not deformed to produce the abutment process of overtravel, but the auxiliary moving contact piece 30 moves up and down within a certain range to resist the pressure of overtravel, while ensuring the continuous conduction between the auxiliary moving contact piece 30 and the auxiliary static contact. After the auxiliary moving contact piece 30 abuts and conducts with the auxiliary static contact, a conduction signal is fed back to the control unit of the contactor.

[0058] Furthermore, the contactor 100 is also provided with a moving iron core, a stationary iron core, an auxiliary stationary contact, a stationary contact, a driving spring 63 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.

[0059] The contactor 100 has two states: on and off. When the magnetic circuit system is powered on, an electromagnetic driving force is generated to cause the moving iron core to drive the contactor 100 upward as a whole, so that the moving contact 65 is in contact with the static contact and the auxiliary moving contact piece 30 is in contact with the auxiliary static contact, so that the contactor is in the on state, and the drive spring 63 is compressed.

[0060] When the magnetic circuit system is powered off, the support mechanism 10 moves downward as a whole, the auxiliary static contact releases the auxiliary moving contact piece 30, and the elastic member 40 can push the auxiliary moving contact piece 30 to return to its original position to prepare for the next contact. At this time, the contactor is in a disconnected state. The overtravel upward movement of the support mechanism 10 will increase the contact degree between the auxiliary moving contact piece 30 and the auxiliary static contact, improve the contact reliability between the two, and thus improve the detection reliability, except for the failure of the auxiliary moving contact piece 30 and the auxiliary static contact.

[0061] Combined with reference Figure 2 As shown, optionally, the support mechanism 10 includes an auxiliary base 11 and a limit frame 12. The limit frame 12 is arranged on the auxiliary base 11, and is enclosed with the auxiliary base 11 to form a travel space 10A, and along the length extension direction of the auxiliary movable contact piece 30, the travel space 10A has a through opening, and both ends of the auxiliary movable contact piece 30 are respectively extended out of the travel space 10A through the through opening.

[0062] In this embodiment, the auxiliary moving contact piece 30 is in the shape of an elongated strip, and the supporting mechanism 10 includes an auxiliary base 11 and a limiting frame 12. The limiting frame 12 is arranged on the side of the mounting frame facing away from the assembly frame. The limiting frame 12 is vertically arranged on the auxiliary base 11 and encloses the auxiliary base 11 to form a travel space 10A. The two sides opposite to the travel space 10A are designed as through openings, so that the two ends of the auxiliary moving contact piece 30 extend through the through openings. The auxiliary base 11 is arranged on the top of the assembly frame 13, and the assembly frame 13 and the limiting frame 12 are respectively located on the two sides of the auxiliary base 11 that are parallel to the moving direction and away from each other. The moving contact 65 is located in the assembly frame 13 and moves synchronously with the assembly frame 13.

[0063] The length extension direction of the auxiliary moving contact piece 30 is set perpendicular to its relative movement direction. The opening of the limit frame 12 can allow both ends of the auxiliary moving contact piece 30 to extend out, and can also limit the rotation of the auxiliary moving contact piece 30 in the horizontal plane, so that its setting state is stable and the movement direction is unique. The reliability of its abutment and conduction with the auxiliary moving contact 33 is improved, and at the same time, it can move relatively to replace the original auxiliary moving contact piece 30 that adapts to the overstroke through deformation yielding, thereby reducing the selection requirements of the auxiliary moving contact piece 30 for the material's anti-yield and anti-deformation toughness, reducing the material cost of the auxiliary moving contact piece 30, and extending the service life of the auxiliary moving contact piece 30.

[0064] It can be understood that the limit frame 12 is arranged on the auxiliary base 11 and presents a door-type structure. The door-type structure has a simple structure and a small number of parts, which is convenient for assembly and replacement of the limit frame 12 or the auxiliary moving contact piece 30, reducing the structural setting cost of the limit frame 12 and the related production management costs.

[0065] Optionally, two inner walls facing the travel space 10A are provided with two positioning platforms 123 , and two positioning grooves 12B are formed on both sides of one positioning platform 123 ; the positioning portion 32 is engaged in the plurality of positioning grooves 12B to fix the auxiliary movable contact piece 30 .

[0066] In this embodiment, the travel space 10A is formed by enclosing a limit frame 12 and an auxiliary base 11. The two sides of the limit frame 12 form the through opening, and the other two sides are located in the travel space 10A and are provided with two positioning platforms 123. The two positioning platforms 123 are protruded from the inner wall of the formed space, and the two side edges of each positioning platform 123 have a height difference with the inner surface of the limit frame 12 to form two positioning platform grooves 12B, and the length extension direction of the positioning platform groove 12B is parallel to the activity direction of the auxiliary movable contact piece 30.

[0067] The auxiliary moving contact piece 30 is provided with a locking portion 32. When the auxiliary moving contact piece 30 is arranged in the travel space 10A, the locking portion 32 is locked in the four locking grooves 12B to fix the installation position of the auxiliary moving contact piece 30 and guide the moving direction of the auxiliary moving contact piece 30 to improve the movement stability of the auxiliary moving contact piece 30.

[0068] Optionally, the elastic member 40 is located between the two positioning platforms 123 ; one end of the elastic member 40 is positioned at the positioning portion 32 , and the other end is fixed to the bottom wall of the travel space 10A.

[0069] In this embodiment, the elastic member 40 is located in the stroke space 10A formed by the limiting frame 12 and the auxiliary base 11, the elastic member 40 is located in the middle of the two positioning platforms 123, and the two ends of the elastic member 40 are abutted and limited by the positioning platforms 123, and the two ends of the elastic member 40 are respectively limited by the bottom wall of the stroke space 10A and the positioning portion 32 of the auxiliary movable contact piece 30, so that the position of the elastic member 40 in the stroke space 10A is stable, and the elastic member 40 is also restricted to move synchronously with the auxiliary movable contact piece 30. The elastic member 40 is initially pre-compressed to prevent the auxiliary movable contact piece 30 from being displaced during impact vibration.

[0070] When the contactor 100 is in the on state, the elastic member 40 is compressed to store energy; when the contactor 100 enters the off state, the elastic member 40 releases the stored energy to push the auxiliary moving contact piece 30 away from the auxiliary base 11 to return to its original position, thereby improving the reliability of relative movement for overtravel.

[0071] Furthermore, the auxiliary moving contact piece 30 is symmetrically designed, and the two ends can be riveted or welded to the auxiliary moving contact 33 as needed to improve the electrical life performance of the auxiliary moving contact 33. The auxiliary moving contact 33 can also be directly made of copper plate without welding / riveting the contact.

[0072] Optionally, the support mechanism 10 is provided with a boss 124 , the boss 124 is located between the two positioning platforms 123 , and one end of the elastic member 40 away from the auxiliary movable contact piece 30 is sleeved on the boss 124 .

[0073] In this embodiment, a limiting frame 12 of a door-shaped structure is provided on the auxiliary base 11 to enclose a travel space 10A with openings on both sides, and the auxiliary movable contact piece 30 and the elastic member 40 can synchronously move up and down in the vertical direction inside the travel space 10A. Specifically, the auxiliary base 11 of the support mechanism 10 is provided with a boss 124 located in the travel space 10A, and the boss 124 is located between the two positioning platforms 123. One end of the elastic member 40 away from the auxiliary movable contact piece 30 is sleeved on the boss 124 to limit the translation and rotational freedom of the elastic member 40 on the horizontal plane. At the same time, the locking portion 32 of the auxiliary moving contact piece 30 limits one end of the elastic member 40 to the inner side of the locking portion 32, and the locking portion 32 is limited and fixed by the locking groove 12B of the locking platform 123 to limit the translational and rotational freedom of the auxiliary moving contact piece 30 in the horizontal plane, thereby limiting the other end of the elastic member 40 so that it can only move up and down synchronously with the auxiliary moving contact piece 30 in the vertical direction, thereby improving the movement reliability.

[0074] Optionally, the locking portion 32 is integrally formed on the auxiliary movable contact piece 30 .

[0075] In this embodiment, the locking portion 32 of the auxiliary movable contact piece 30 is used to limit one end of the elastic member 40, and the locking portion 32 is engaged with the locking groove 12B of the locking platform 123 to limit the translation and rotational freedom of the auxiliary movable contact piece 30 on the horizontal plane. In order to ensure the reliability of the locking portion 32 limiting the elastic member 40, the locking portion 32 can be integrally formed on the auxiliary movable contact piece 30 to reduce the manufacturing cost of the auxiliary movable contact piece 30. The relative structural connection strength of the integral molding is greater than the structural strength and stability of the butt connection, and the integral molding makes the materials the same, the resistivity is the same, and the conductive performance is smooth.

[0076] Combined with reference Figure 5 As shown, further optionally, the locking portion 32 is configured as a plurality of locking teeth 321 arranged at intervals, and the two locking teeth 321 located on the same side of the auxiliary movable contact piece 30 are respectively engaged in two locking grooves 12B on both sides of a locking platform 123, and the plurality of locking teeth 321 are arranged around the outer periphery of the elastic member 40.

[0077] In this embodiment, the auxiliary moving contact piece 30 is symmetrically designed, and the two ends can be riveted or welded to the auxiliary moving contacts 33 as needed to improve the electrical life performance of the auxiliary moving contacts 33, or the copper plate can be used directly as the auxiliary moving contact 33 without welding / riveting the contacts.

[0078] The locking portion 32 is arranged in the middle of the auxiliary movable contact piece 30, and the locking portion 32 is set as a plurality of locking teeth 321 arranged at intervals. Each locking tooth 321 can be a plurality of bent protrusions formed by partially cutting the main body 31 of the auxiliary movable contact piece 30 and then bending it. The bent protrusions are perpendicular to the main body 31 and extend toward the side of the main body 31 facing the elastic member 40, so as to lock the elastic member 40 into the multiple bent protrusions.

[0079] The connecting line of the multiple clamping parts 32 is rectangular, and the multiple clamping parts 32 can be located on the same circumference, that is, the elastic member 40 is clamped inside the multiple bent protrusions and can serve as the inscribed circle of the multiple bent protrusions. At the same time, the outer periphery of each bent protrusion is clamped in the clamping platform groove 12B on the side of a clamping platform 123, and the multiple bent protrusions are limited by the clamping platform groove 12B, thereby limiting the translation and rotational freedom of the auxiliary movable contact piece 30 on the horizontal plane, and at the same time improving the setting stability and movement direction certainty of the elastic member 40.

[0080] It can be understood that the elastic member 40 is a type of compression spring or tower spring.

[0081] Combined with reference Figure 3 and Figure 4As shown, optionally, the limit frame 12 includes a bearing plate 121 and a buckle plate 122. The bearing plate 121 is arranged in an annular shape, and two mounting grooves 12A are provided on two opposite sides of the bearing plate 121. The buckle plate 122 is U-shaped, and the two ends of the U-shaped buckle plate 122 are respectively arranged in the two mounting grooves 12A. The buckle plate 122, the bearing plate 121 and the auxiliary base 11 enclose a travel space 10A.

[0082] In this embodiment, the auxiliary moving contact piece 30 moves in the annular space formed by the assembly of the carrying plate 121, the buckle plate 122 and the auxiliary base 11. When the contactor product is closed and turned on, the auxiliary moving contact piece 30 moves upward along with the auxiliary base 11, the carrying plate 121 and the limiter, and after the auxiliary moving contact piece 30 contacts the auxiliary static contact, it passes through the stroke space 10A to complete the overstroke. In the process of releasing and disconnecting the contactor product, the auxiliary moving contact 33 is pushed back to the initial position by the energy release of the elastic member 40.

[0083] The carrier plate 121 is an annular plate structure, and the carrier plate 121 is arranged in a square or circular shape and is vertically arranged on the auxiliary base 11. Two positioning platforms 123 are respectively arranged on the opposite sides of the carrier plate 121. The height of the positioning platforms 123 is higher than the height of the rest of the carrier plate 121, and the raised part can be used as the up and down movement stroke of the auxiliary movable contact piece 30. The two opposing sides of the two positioning platforms 123 are respectively protruded toward the inside of the stroke space 10A, so that the two side edges of the positioning platforms 123 along the up and down directions respectively form positioning platform grooves 12B with the rest of the frame of the carrier plate 121, so as to engage and limit the multiple positioning teeth 321 of the positioning portion 32 of the auxiliary movable contact piece 30, and limit the displacement of the auxiliary movable contact piece 30 in the horizontal plane.

[0084] Each positioning platform 123 has a mounting groove 12A distributed in the up-down direction at its center. The buckle plate 122 is U-shaped, and both ends of the U-shaped buckle plate 122 are respectively disposed in two mounting grooves 12A to enclose the supporting plate 121 and the auxiliary base 11 to form a travel space 10A.

[0085] Optionally, undercuts 1221 are provided on both side edges of the buckling plate 122 , and buckle hooks are correspondingly provided on the groove wall of the installation groove 12A, and the undercuts 1221 are engaged with the buckle hooks.

[0086] In this embodiment, a plurality of undercuts 1221 are provided on the snap-fit ​​plate 122, and corresponding hooks are provided on the groove wall of the installation groove 12A. When the snap-fit ​​plate 1227 is pressed into the installation groove 12A in the positioning platform 123 of the carrier plate 121, the snap-fit ​​cooperation between the undercuts 1221 and the hooks can prevent the snap-fit ​​plate 122 and the groove wall of the installation groove 12A from loosening and falling, thereby improving the connection stability and reliability between the snap-fit ​​plate 122 and the carrier plate 121.

[0087] It is understandable that the inner wall of the installation groove 12A may also not be provided with a hook, and the several undercuts 1221 of the snap plate 122 are protruding on the two side walls of the snap plate 122 to increase the interference fit strength between the snap plate 122 and the inner wall of the installation groove 12A, so that the snap plate 122 can be stably matched with the supporting plate 121 and can be removed and replaced.

[0088] Optionally, at least one insulating wall 50 is further disposed on the support mechanism 10 , and the insulating walls 50 are arranged at intervals around the outer periphery of the travel space 10A to increase the creepage distance of the support mechanism 10 .

[0089] In this embodiment, the insulating wall 50 is disposed on the auxiliary base 11. Both the insulating wall 50 and the auxiliary base 11 can be made of plastic or rubber. The two can be either integrally formed or detachably assembled. The provision of the insulating wall 50 can increase the creepage distance between the auxiliary moving contact piece 30 and the moving contact 65, thereby improving the safety of electrical contact.

[0090] Optionally, the insulating wall 50 includes a first enclosure 51 and a second enclosure 52, wherein the first enclosure 51 is spaced around the outer periphery of the travel space 10A. The second enclosure 52 is spaced around the outer periphery of the first enclosure 51, and the length direction of the second enclosure 52 is parallel to the length extension direction of the auxiliary movable contact piece 30, so as to increase the creepage distance corresponding to the movable contact 65 on the entire circuit when the circuit of the main body 31 of the auxiliary movable contact piece 30 and the auxiliary movable contacts 33 at both ends are turned on.

[0091] It can be understood that the driving device 100 of the high-voltage DC contactor is also provided with a moving iron core, a stationary iron core, an auxiliary stationary contact, a stationary contact, a driving spring 63 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.

[0092] Optionally, the contactor 100 further includes a first magnetic conductive block 61 and an assembly frame 13, wherein the first magnetic conductive block 61 is disposed on a side of the support mechanism 10 that faces away from the auxiliary movable contact piece 30. The assembly frame 13 is disposed on a side of the first magnetic conductive block 61 that faces away from the support mechanism 10, and the assembly frame 13, the first magnetic conductive block 61 and the support mechanism 10 are riveted and fixed.

[0093] In this embodiment, combined with reference Figure 1 , Figure 3 as well as Figure 6As shown, the pushing device 100 also includes an assembly frame 13 located on the side of the auxiliary base 11 facing away from the limit frame 12, and a cavity 13A is formed on the assembly frame 13. The pushing device 100 also includes a first magnetic conductive block 61 and a second magnetic conductive block 62. The moving contact 65 is arranged between the first magnetic conductive block 61 and the second magnetic conductive block 62. The first magnetic conductive block 61, the frame body of the assembly frame 13 and the auxiliary base 11 of the support mechanism 10 are riveted together. The driving spring 63 is arranged at the bottom of the second magnetic conductive block 62 and is located in the pushing cavity 13A on the assembly frame 13.

[0094] Specifically, through holes are provided on the auxiliary base 11 and the first magnetic conductive block 61, and a convex corner is provided on the assembly frame 13, which passes through the through holes on the first magnetic conductive block 61 and the auxiliary base 11 in sequence, so that the three parts are riveted together to form a whole. The assembly frame 13 is also provided with a side hole 12B, and the second magnetic conductive block 62 is installed through the side hole 12B. The bottom of the assembly frame 13 away from the auxiliary base 11 is provided with bottom holes of different sizes, which can make the rubber package of the assembly frame 13 tighter.

[0095] Combined with reference Figure 7 and Figure 8 As shown, the second magnetic conductive block 62 is provided with a groove 62A, and the groove 62A cooperates with the fixed platform 651 provided on the moving contact 65 to prevent the moving contact 65 from moving. The second magnetic conductive block 62 is provided with a bend, which can effectively increase the matching gap between the first magnetic conductive block 61 and the second magnetic conductive block 62, and increase the electromagnetic attraction under high current conditions. The second magnetic conductive block 62 is also provided with a convex bulge, which can cooperate with the drive spring 63 to limit the movement of the drive spring 63.

[0096] 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 contactor, characterized in that: The contactor comprises: A housing, wherein the housing is provided with a cavity, and an auxiliary static contact is provided on the top of the cavity; A supporting mechanism, the supporting mechanism is arranged in the cavity and is provided with a travel space; An auxiliary movable contact piece, the auxiliary movable contact piece is arranged in the travel space and movably connected to the supporting mechanism, and the auxiliary movable contact piece is provided with a locking portion; and An elastic member is arranged in the travel space, the elastic member is connected to the locking portion, and the supporting mechanism drives the auxiliary moving contact piece to move so as to be electrically connected or away from the auxiliary static contact.

2. The contactor according to claim 1, characterized in that: Two inner walls facing the travel space are provided with two positioning platforms, and two positioning platform grooves are formed on both sides of the positioning platform; The clamping portion is clamped in a plurality of the clamping slots to fix the auxiliary movable contact piece.

3. The contactor according to claim 2, characterized in that: The elastic member is located between the two positioning platforms; One end of the elastic member is clamped on the clamping portion, and the other end is fixed on the bottom wall of the travel space.

4. The contactor according to claim 3, characterized in that: The locking portion is integrally formed on the auxiliary moving contact piece; And / or, the support mechanism is provided with a boss, the boss is located between the two positioning platforms, and one end of the elastic member away from the auxiliary movable contact piece is sleeved on the boss; And / or, the locking portion is configured as a plurality of locking teeth arranged at intervals, and the two locking teeth located on the same side of the auxiliary moving contact piece are respectively engaged in two locking platform grooves on both sides of a locking platform, and the plurality of locking teeth are arranged around the outer periphery of the elastic member.

5. The contactor according to claim 1, characterized in that: The supporting mechanism comprises: Auxiliary base; and The limit frame is arranged on the auxiliary base and is enclosed with the auxiliary base to form the travel space. The travel space has a through opening along the length extension direction of the auxiliary moving contact piece, and the two ends of the auxiliary moving contact piece extend out of the travel space through the through opening respectively.

6. The contactor according to claim 5, characterized in that: The limiting frame comprises: A bearing plate, the bearing plate is arranged in a ring shape, and two mounting grooves are provided on two opposite sides of the bearing plate; and The buckle plate is U-shaped, and the two ends of the U-shaped buckle plate are respectively arranged in the two installation grooves. The buckle plate, the bearing plate and the auxiliary base enclose the travel space.

7. The contactor according to claim 6, characterized in that: The two side edges of the buckle plate are provided with undercuts, and the groove wall of the installation groove is correspondingly provided with buckle hooks, and the undercuts are clamped with the buckle hooks.

8. The contactor according to claim 1, characterized in that: At least one insulating wall is also provided on the support mechanism, and the insulating wall is arranged at intervals around the outer periphery of the travel space to increase the creepage distance of the support mechanism.

9. The contactor according to claim 8, characterized in that: The insulating wall comprises: A first enclosure, the first enclosure being spaced around the outer circumference of the travel space; and A second enclosure, wherein the second enclosure is spaced around the outer circumference of the first enclosure, and the length direction of the second enclosure is parallel to the length extension direction of the auxiliary movable contact piece.

10. The contactor according to claim 1, characterized in that: The contactor also includes: a first magnetic conductive block, the first magnetic conductive block being arranged on a side of the supporting mechanism facing away from the auxiliary movable contact piece; and An assembly frame is arranged on a side of the first magnetic conductive block facing away from the supporting mechanism, and the assembly frame, the first magnetic conductive block and the supporting mechanism are fixed by riveting.

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