CN215834478U

CN215834478U - Novel movable contact assembly and contactor

Info

Publication number: CN215834478U
Application number: CN202121901748.0U
Authority: CN
Inventors: 张凡
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-08-14
Filing date: 2021-08-14
Publication date: 2022-02-15
Anticipated expiration: 2031-08-14

Abstract

The invention belongs to the technical field of electric appliances, and relates to a novel movable contact assembly and a contactor; the novel moving contact component comprises an electric connecting plate, wherein the electric connecting plate is connected with a control rod; upward extending sheets are arranged on two sides of the operating lever, a side port is arranged on each extending sheet, the operating lever further comprises an upper yoke, a lower yoke and a contact spring, side bulges arranged on the side port are arranged on two sides of the upper yoke, the side bulges are arranged in the side port, an I-shaped column is inserted in the middle of the upper yoke, an electric connecting plate middle hole is arranged in the middle of the electric connecting plate, and the moving contact component arranged on the contactor is the moving contact component with the characteristics; the contactor has the advantages of stronger breaking capacity and short-time overcurrent resistance, difficult generation of electric arcs and ignition, prolonged service life of the whole contactor and better line protection.

Description

Novel movable contact assembly and contactor

Technical Field

The invention belongs to the technical field of electric appliances, and also relates to an electric appliance component, in particular to a direct current contactor contact assembly system and a contactor.

Background

In the field of electric appliances, a contactor is a common electric appliance and mainly used for controlling the disconnection and the connection of a circuit; with the development of technology, stricter control is required in some circuits, for example, in the fields of new energy vehicles, charging piles, photovoltaic systems, energy storage systems, and the like.

The contactor comprises a shell, two terminals, namely a leading-out end and an entering end, are arranged outside the shell, the two terminals extend into the shell and respectively comprise contacts, namely a leading-out end point and a entering end point, a moving contact assembly is arranged in the shell and comprises an electric connection plate, the electric connection plate is connected with a control lever, the control lever operates to drive the electric connection plate to operate, and the electric connection plate can electrically connect or disconnect the leading-out end point and the entering end point.

At present, the moving contact assembly has a simple structure, for example, the moving contact assembly has a T-shaped section, and has weak ability of short-time over-current resistance, so that the parts are easy to damage, electric arcs and fire are easy to generate, the service life of the whole contactor is influenced, and the electric appliance cannot be protected by a better circuit.

For example, in patent CN205863097U, a high-voltage vacuum dc contactor is disclosed, which comprises a housing, a cylinder, a main assembly, an upper cover, and a small cap; the described general assembly comprises an electrical contact system, a magnetic arc extinguishing system and an electromagnetic system; the inner push rod sleeve is placed into the outer push rod sleeve and is lubricated by the PTFE film, and the inner push rod sleeve is designed into a T-shaped structure in order to prevent the PTFE film from sliding into a product cavity to cause damage; the novel sealed direct current contactor is formed by assembling a shell, filling epoxy resin, curing at high temperature, exhausting and filling inert gas, wherein a coil directly passes through a contact support through a leading-out wire and is connected with a circuit board through a shell threading hole, so that an internal lead is completely hidden, and only an electric wire connected with a power supply part is exposed, thereby achieving the effects of preventing wire breakage, preventing snapping, being attractive and the like.

Disclosure of Invention

The invention aims to solve the defects and provides a movable contact component and a contactor of a line protection electric appliance, which have stronger breaking capacity and short-time overcurrent resistance, are not easy to generate electric arcs and fire, prolong the service life of the whole contactor and can better protect the line, namely a novel movable contact component and a contactor.

The moving contact component adopts the technical scheme that: a novel moving contact assembly comprises an electric connecting plate, wherein the electric connecting plate is connected with a control rod; the method is characterized in that: the operating rod is characterized in that upward extending pieces are arranged on two sides of the upper surface of the operating rod, a side opening is formed in each extending piece, the operating rod further comprises an upper yoke iron, a lower yoke iron and a contact spring, side bulges arranged on the side openings are arranged on two sides of the upper yoke iron, an I-shaped column is arranged in the side opening in a protruding mode, an electric connecting plate middle hole is formed in the middle of the electric connecting plate, a lower yoke iron middle hole is formed in the middle of the lower yoke iron, the I-shaped column penetrates through the electric connecting plate middle hole and the lower yoke iron middle hole, the electric connecting plate and the lower yoke iron can be arranged on the I-shaped column in a vertically moving mode, and the contact spring is arranged between the lower surface of the lower yoke iron and the upper end of the operating rod.

Furthermore, the upper end of the operating lever is also provided with a mounting seat at the lower end of the contact spring, and the lower end of the contact spring is mounted on the mounting seat.

Furthermore, a return spring is arranged around the lower part of the operating rod.

The technical scheme adopted by the contactor is as follows: a contactor comprises a shell, wherein two terminals, namely a leading-out end and a leading-in end, are arranged outside the shell, extend into the shell and are respectively provided with a contact, namely a leading-out end point and a leading-in end point, an electric connecting plate is arranged in the shell, the electric connecting plate is connected with a control lever, the electric connecting plate and the control lever form a moving contact component, and the operation of the control lever can realize that the electric connecting plate can electrically connect or disconnect the leading-out end point and the leading-in end point; the method is characterized in that: the moving contact component is characterized in that the moving contact component is a moving contact component.

The invention has the beneficial effects that: the movable contact assembly and the contactor also have the advantages of stronger breaking capacity and short-time overcurrent resistance, difficult generation of electric arcs and fire, prolonged service life of the whole contactor and better line protection.

Drawings

Fig. 1 is a schematic view of the structure of the moving contact assembly of the present invention.

Fig. 2 is an exploded view of the moving contact assembly of the present invention.

Fig. 3 is a schematic diagram showing the relationship of each component of the movable contact and the position of the movable contact when the contact is in an open state.

Fig. 4 is a schematic view of the relationship of the movable contact components and the position of the movable contact when the contact is in a closed state.

Fig. 5 is an enlarged schematic view of a portion E in fig. 4.

FIG. 6 is a schematic view of a contactor according to an embodiment of the present invention.

Wherein: 1A, an electric connection plate 2A, a control lever 3A, a protruding piece 31A, a side opening 4A, an upper yoke iron 41A, a side bulge 5A, a lower yoke iron 6A, a contact spring 7A, an I-shaped column 8A, a return spring 9A and a mounting seat.

Detailed Description

The invention will be further described with reference to the accompanying drawings.

As shown in fig. 1, 2, 3, 4 and 5, a novel movable contact assembly comprises an electric connecting plate 1A, wherein the electric connecting plate is connected with an operating rod 2A; the method is characterized in that: the operating rod is characterized in that upward extending pieces 3A are arranged on two sides of the upper surface of the operating rod, side openings 31A are formed in the extending pieces, an upper yoke iron 4A, a lower yoke iron 5A and a contact spring 6A are further included, side protrusions 41A arranged on the side openings are arranged on two sides of the upper yoke iron, the side protrusions are arranged in the side openings, an I-shaped column 7A penetrates through the middle of the upper yoke iron, namely the I-shaped column can move on the upper yoke iron, an electric connecting plate middle hole is formed in the middle of the electric connecting plate, a lower yoke iron middle hole is formed in the middle of the lower yoke iron, the I-shaped column penetrates through the electric connecting plate middle hole and the lower yoke iron middle hole, the electric connecting plate and the lower yoke iron can be arranged on the I-shaped column in a vertically moving mode, and the contact spring is arranged between the lower face of the lower yoke iron and the upper end of the operating rod.

In order to better understand the principle of the moving contact assembly of the present invention, a contactor equipped with the moving contact assembly is further described below.

As shown in fig. 6, it is a contactor equipped with the novel moving contact assembly, and it includes a housing 01 and internal functional components, the inside of the housing is equipped with a static contact, the static contact includes a left terminal 31 and a right terminal 32, the upper part of the left terminal 31 is connected to a left terminal post 311 outside the housing, the upper part of the right terminal 32 is connected to a right terminal post 321 outside the housing;

two leading-out contact points are arranged in the shell, the two leading-out contact points are a left leading-out contact point 312 and a right leading-out contact point 322 respectively, the left leading-out contact point 312 can be connected with or disconnected with a left contact point at one end of the electric contact plate 1A, and the right leading-out contact point 322 can be connected with or disconnected with a right contact point at one end of the electric contact plate 1A;

the moving contact component is also arranged in the shell, namely the moving contact component of the structure, and the operating lever of the moving contact component is connected with a component for operating the moving contact component;

after the lower yoke iron and the electric connecting plate move upwards, the two sides of the electric connecting plate and the static contact are contacted and closed, if an overcurrent fault occurs in a main loop, an electric repulsive force can be generated at the contact point of the moving contact and the static contact, the generation of the repulsive force can cause adverse effects on the function of a contactor, and the contactor provided with the moving contact assembly can effectively offset part of the electric repulsive force and improve the short-resistant and durable performance of the contactor. The main principle is as follows: when main circuit takes place overcurrent trouble, overcurrent can make and produce electronic repulsion between the contact, and upward passive pulling force can be produced to upper yoke iron and lower yoke iron together to and the initiative pulling force that the I-shaped post provided, and the I-shaped post produces the condition of initiative pulling force and is: when the electric repulsion force is larger than the sum of the final pressure of the contact and the passive lifting force, the electric contact plate is pushed to continuously move downwards to the lowest position (the distance shown in figure 5) of the limiting distance D of the limiting I-shaped column, namely the I-shaped column is triggered to generate the active lifting force, so that the two lifting forces of the active lifting force and the passive lifting force are generated in a superposed manner, more electric repulsion force generated by the movable contact assembly on the electric contact plate when an overcurrent fault occurs is offset, the short-time overcurrent tolerance capability is stronger, and the purpose of the invention is achieved.

The part of the operating lever which is arranged below the operating lever and is operated by the linkage operating lever is a part in the prior art.

The concrete description is as follows:

as shown in fig. 6, an electromagnetic coil 24 for generating a magnetic field is installed at the lower part in the housing, the electromagnetic coil 24 is provided with a lead wire, an armature 23 is installed in the electromagnetic coil 24, the armature 23 is installed on an operating rod 2A, a return spring 8A is installed in the middle of the operating rod 2A, and a contact spring is installed at the upper part of the operating rod 2A; when the electromagnetic coil 24 is electrified, the coil generates a magnetic field to act on the armature 23, so that the operating rod 2A is driven to move upwards, an electric contact plate of the linkage movable contact component moves upwards, and the upper left and right leading-out terminal contact points 312 and 322 are contacted; when the electromagnetic coil 24 is powered off, the coil does not generate a magnetic field, at the moment, the return spring provides power for the armature 23 to move downwards, and meanwhile, the operating lever is driven to move downwards, so that the electric contact plate of the moving contact component is linked to be separated from the left and right leading-out terminal contact points 312 and 322;

the armature 23 and the operating rod 2A are relatively fixed through a clamp spring 20, wherein a return spring is arranged between the armature 23 and the static iron core 17 and sleeved on the operating rod 2A; wherein a contact spring is installed between the lower yoke 5A and the stepped shaft of the operating lever 2A to provide a contact terminal pressure when the contact plate is closed.

According to the structural layout, the armature 23, the operating rod 2A and the movable contact component can simultaneously move up and down together; the state of the linkage electric connection plate at different positions is shown in fig. 3, 4 and 5, the state of the linkage electric connection plate is shown in fig. 3 when the linkage electric connection plate is in an open state, the state of the linkage electric connection plate is shown in fig. 3 when the contact is in a closed state, the state of the contact is shown in fig. 4 when a repulsive force is generated by overcurrent, the farthest repulsive force distance is designed on the I-shaped column, and the state of generating an active lifting force when the repulsive force distance is exceeded is shown in fig. 5;

and the upper part of the operating rod 2A is also provided with a contact spring which provides final contact pressure when the moving contact is closed.

A U-shaped yoke 16, a ring-shaped yoke 19 and a static iron core 17 are arranged in the shell, the U-shaped yoke 16 is arranged around an electromagnetic coil 24, the ring-shaped yoke 19 is arranged on the periphery of an armature 23, and the static iron core is arranged above the armature 23 to form a closed magnetic ring.

Preferably, the contactor is further provided with a permanent magnet 51 around a contact system consisting of the moving contact and the fixed contact, the permanent magnet is used for enhancing an external magnetic field of the contact system, and when a circuit fault occurs in the main contact system, the fault electric arc can be quickly extinguished.

Further, the contactor described, in order to enhance arc quenching, seals the entire contact system within a housing, which is filled with an inert gas to increase the ability of the contactor to break a fault arc.

Furthermore, the upper end of the operating lever is also provided with a mounting seat 9A at the lower end of the contact spring, and the lower end of the contact spring is mounted on the mounting seat.

Furthermore, a return spring 8A is arranged around the lower part of the operating rod.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "left", "right", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

The embodiments of the present invention are merely preferred structures and not exclusive structures, wherein the accompanying drawings and the structures, ratios, sizes, quantities, and the like shown therein are only used for matching with the contents disclosed in the specification, so as to be understood and read by those skilled in the art, and are not used for limiting the conditions under which the present invention can be implemented, and therefore, the present invention has no technical significance, and any structural modifications, changes in the proportional relationships, or adjustments in the sizes thereof, do not affect the effects and purposes of the present invention, and still fall within the scope of the technical contents disclosed in the present invention.

Claims

1. A novel moving contact assembly comprises an electric connecting plate, wherein the electric connecting plate is connected with a control rod; the method is characterized in that: the operating rod is characterized in that upward extending pieces are arranged on two sides of the upper surface of the operating rod, a side opening is formed in each extending piece, the operating rod further comprises an upper yoke iron, a lower yoke iron and a contact spring, side bulges arranged on the side openings are arranged on two sides of the upper yoke iron, an I-shaped column is arranged in the side opening in a protruding mode, an electric connecting plate middle hole is formed in the middle of the electric connecting plate, a lower yoke iron middle hole is formed in the middle of the lower yoke iron, the I-shaped column penetrates through the electric connecting plate middle hole and the lower yoke iron middle hole, the electric connecting plate and the lower yoke iron can be arranged on the I-shaped column in a vertically moving mode, and the contact spring is arranged between the lower surface of the lower yoke iron and the upper end of the operating rod.

2. The novel moving contact assembly as claimed in claim 1 wherein: the upper end of the operating lever is also provided with a mounting seat for mounting a contact spring, and the lower end of the contact spring is mounted on the mounting seat.

3. The novel moving contact assembly as claimed in claim 1 or claim 2 wherein: and a return spring is arranged around the lower part of the operating rod.

4. A contactor comprises a shell, wherein two terminals, namely a leading-out end and a leading-in end, are arranged outside the shell, extend into the shell and are respectively provided with a contact, namely a leading-out end point and a leading-in end point, an electric connecting plate is arranged in the shell, the electric connecting plate is connected with a control lever, the electric connecting plate and the control lever form a moving contact component, and the operation of the control lever can realize that the electric connecting plate can electrically connect or disconnect the leading-out end point and the leading-in end point; the method is characterized in that: the moving contact assembly is the novel moving contact assembly in the claims 1-3.

5. The contactor of claim 4, wherein: and permanent magnets are arranged around a contact system consisting of the moving contact and the fixed contact.