CN213660302U - Relay with a movable contact - Google Patents

Abstract

The embodiment of the application provides a relay, including casing, drive assembly and coil pack set up in the casing, the coil pack with drive assembly electromagnetic fit, be provided with at least two sets of stationary contacts on the casing, the last coaxial coupling of drive assembly has two at least movable contact plates, every dislocation set and mutual insulation between the movable contact plate, every group the stationary contact is with every the movable contact at movable contact plate both ends is relative. And under the condition that the coil assembly drives the driving assembly to move along the axial direction of the driving assembly, the movable contact is in contact with the fixed contact. The relay that this application embodiment provided can realize being equivalent to the break-make function of two or more single contact relays through mutually supporting of at least two sets of stationary contacts and at least two movable contact plates, two at least moreover movable contact plate is only through one the drive assembly drive has simplified the structure and the use cost of relay have improved the suitability of relay.

Description

Relay with a movable contact

Technical Field

The application belongs to the technical field of electrical equipment, specifically, this application relates to a relay.

Background

The relay is a basic element used for controlling and switching the direct current load in the field of industrial control, and with the rapid development of power supply technology, the voltage of a direct current power supply is higher and higher, if the voltage of a battery pack of a new energy automobile reaches 320V-750 VDC, the voltage of a power supply module of a charging pile reaches 1000VDC for realizing rapid charging.

The conventional direct-current relay generally exposes the contact in the air environment in the use process, when high-voltage and high-current loads are cut off, the situation that electric arcs leak or continuously burn at the positions of the contacts possibly causes abnormal operation and even burning of peripheral equipment devices, so that the conventional relay cannot adapt to the application scene of direct-current high-voltage and high-current, and the application range of the conventional relay is limited.

At present, a high-voltage direct-current relay generally adopts a contact control mode, a pre-charging loop and a quick-charging loop of main direct-current charging equipment at the present stage are synchronously controlled by a positive loop and a negative loop, in order to realize the synchronous control of the positive loop and the negative loop of the direct-current charging equipment, two or even a plurality of relays are needed to control a group of direct-current charging equipment, and the structural complexity and the use cost of the relays are increased.

SUMMERY OF THE UTILITY MODEL

An object of the embodiment of the present application is to provide a new technical solution for a relay.

According to a first aspect of the present application, there is provided a relay comprising:

the electromagnetic driving device comprises a shell, a driving assembly and a coil assembly, wherein the driving assembly and the coil assembly are arranged in the shell, and the coil assembly is in electromagnetic fit with the driving assembly;

the shell is provided with at least two groups of fixed contacts, the driving assembly is coaxially connected with at least two movable contact plates, each movable contact plate is arranged in a staggered mode and is insulated from each other, and each group of fixed contacts are opposite to the movable contacts at the two ends of each movable contact plate;

and under the condition that the coil assembly drives the driving assembly to move along the axial direction of the driving assembly, the movable contact is in contact with the fixed contact.

Optionally, the movable contact plate is bent.

Optionally, the driving assembly is connected with two movable contact plates, and the bending directions of the two movable contact plates are opposite.

Optionally, the bent shape comprises at least one of an arch shape, a zigzag shape, and a door shape.

Optionally, two sets of the fixed contacts are arranged on the housing, two movable contact plates are connected to the driving assembly, and the distance between one set of the movable contacts and the opposite set of the fixed contacts is equal to the distance between the other set of the movable contacts and the opposite set of the fixed contacts.

Optionally, two sets of the fixed contacts are arranged on the housing, two movable contact plates are connected to the driving assembly, and the distance between one set of the movable contacts and the opposite set of the fixed contacts is greater than the distance between the other set of the movable contacts and the opposite set of the fixed contacts.

Optionally, each set of the stationary contacts is disposed oppositely, and at least two sets of the stationary contacts are disposed on the housing at equal intervals.

Optionally, a ring magnet is disposed on a peripheral side of the stationary contact.

Optionally, the ring magnet includes a plurality of plate magnets, the plurality of plate magnets are spaced around the periphery of the stationary contact, at least two adjacent plate magnets are connected by a magnetic flux collecting cover, and the magnetic poles of the two adjacent plate magnets are different from the magnetic poles connected to the magnetic flux collecting cover.

Optionally, a baffle is arranged on the housing, and the baffle is located between the adjacent stationary contacts.

One technical effect of the embodiment of the application is as follows:

the embodiment of the application provides a relay, including casing, drive assembly and coil pack set up in the casing, the coil pack with drive assembly electromagnetic fit, be provided with at least two sets of stationary contacts on the casing, the last coaxial coupling of drive assembly has two at least movable contact plates, every dislocation set and mutual insulation between the movable contact plate, every group the stationary contact is with every the movable contact at movable contact plate both ends is relative. The relay that this application embodiment provided can realize being equivalent to the break-make function of two or more single contact relays through mutually supporting of at least two sets of stationary contacts and at least two movable contact plates, two at least moreover movable contact plate is only through one the drive assembly drive has simplified the structure and the use cost of relay have improved the suitability of relay.

Further features of the present application and advantages thereof will become apparent from the following detailed description of exemplary embodiments thereof, which is to be read in connection with the accompanying drawings.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the application and together with the description, serve to explain the principles of the application.

Fig. 1 is a schematic overall structure diagram of a relay according to an embodiment of the present disclosure;

fig. 2 is a schematic structural diagram (excluding a housing) of a relay provided in an embodiment of the present application;

fig. 3 is a schematic structural diagram of a relay according to an embodiment of the present disclosure (an inner housing excluding an upper housing);

fig. 4 is a schematic structural diagram of a driving assembly of a relay according to an embodiment of the present disclosure;

fig. 5 is a schematic diagram of a movable contact plate structure of a relay according to an embodiment of the present disclosure;

fig. 6 is a schematic diagram of another movable contact structure of a relay according to an embodiment of the present disclosure;

fig. 7 is a cross-sectional view (a section is taken by a movable contact plate) of a relay according to an embodiment of the present application;

fig. 8 is a cross-sectional view (with another movable contact plate as a cross section) of a relay according to an embodiment of the present application;

fig. 9 is a schematic structural diagram of a movable contact plate and a ring magnet of a relay according to an embodiment of the present disclosure;

fig. 10 is a disassembled schematic view of a relay according to an embodiment of the present disclosure;

fig. 11 is a schematic overall structure diagram of another relay according to an embodiment of the present application.

Wherein: 1-a shell; 11-stationary contact; 12-a baffle plate; 13-upper shell; 14-a lower shell; 2-a drive assembly; 21-a movable touch plate; 22-a stationary core; 23-a movable iron core; 24-a drive shaft; 25-an elastic member; 3-a coil assembly; 4-a ring magnet; 41-plate-shaped magnet; 42-poly magnetic shield.

Detailed Description

Various exemplary embodiments of the present application will now be described in detail with reference to the accompanying drawings. It should be noted that: the relative arrangement of the components and steps, the numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present application unless specifically stated otherwise.

The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the application, its application, or uses.

Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate.

In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.

A relay (relay) is an electric control device that generates a predetermined step change in a controlled amount in an electric output circuit when a change in an input amount (excitation amount) meets a predetermined requirement. It has an interactive relationship between a control system (also called an input loop) and a controlled system (also called an output loop). The automatic switch is usually applied to an automatic control circuit, and the automatic switch controls the operation of a large current by using a small current, and plays the roles of automatic regulation, safety protection, circuit conversion and the like in the circuit.

Referring to fig. 1 to 11, an embodiment of the present application provides a relay, including:

the electromagnetic induction type electromagnetic driving device comprises a shell 1, a driving assembly 2 and a coil assembly 3, wherein the driving assembly 2 and the coil assembly 3 are arranged in the shell 1, the coil assembly 3 is in electromagnetic fit with the driving assembly 2, for example, an iron core is arranged in the driving assembly 2, and a coil of the coil assembly 3 generates electromagnetic acting force with the iron core when being electrified; be provided with at least two sets of stationary contact 11 on the casing 1, coaxial connection has two at least movable contact 21 on the drive assembly 2, and the group number of stationary contact 11 is the same with movable contact 21's number, and every moves dislocation set and mutual insulation between the contact 21, for example movable contact 21 can be the strip movable contact, is certain contained angle (can be acute angle or right angle) between every strip movable contact, sets up the insulating layer between the adjacent movable contact 21, and every group stationary contact 11 is relative with the movable contact at every movable contact 21 both ends.

In the case where the coil assembly 3 drives the driving assembly 2 to move in the axial direction thereof, that is, in the case where the coil of the coil assembly 3 is energized, the direction and speed at which the coil drives the driving assembly 2 to move can be controlled by controlling the energizing direction and magnitude of the energizing current of the coil. When the driving assembly 2 moves along the axial direction thereof and approaches the fixed contacts 11, the movable contacts and the fixed contacts 11 can be switched from being separated to being in contact with each other, so as to realize communication belonging to the same group of the fixed contacts 11.

In addition, referring to fig. 10, the housing 1 may include an upper shell 13 and a lower shell 14, the upper shell 13 includes an outer shell and an inner shell, and the inner shell may be a ceramic inner shell, and the ceramic inner shell forms a sealed cavity in which the movable contact makes contact with the stationary contact 11, so as to ensure stability of communication between the movable contact and the stationary contact 11.

Specifically, under the condition that two groups of stationary contacts 11 are arranged on the housing 1 and two movable contact plates 21 are connected to the driving assembly 2, in a specific embodiment, one group of stationary contacts 11 can be connected in series with the positive pole of a circuit, and the other group of stationary contacts 11 can be connected in series with the negative pole of the circuit, and at this time, the two groups of stationary contacts 11 and the two movable contact plates 21 can be respectively used as switch modules for the positive pole and the negative pole of the circuit, so that the independent adjustment and protection for the positive pole and the negative pole of the circuit can be realized; in another specific implementation manner, when two sets of stationary contacts 11 are used in parallel, that is, two sets of stationary contacts 11 are connected to two independent circuits, the relay provided in the embodiment of the present application can double the overcurrent capability of the relay through two circuits; in another specific embodiment, in the case that two sets of stationary contacts 11 are used in parallel, if two positive electrodes of two sets of stationary contacts 11 are connected in series, and/or two negative electrodes of two sets of stationary contacts 11 are connected in series, as shown in fig. 11, the relay provided in this embodiment of the present application may be a relay having three or four control points, so as to improve the voltage resistance and arc extinguishing capability of the relay.

The relay that this application embodiment provided can realize being equivalent to the break-make function of two or a plurality of single contact relays through mutually supporting of at least two sets of stationary contacts 11 and at least two movable contact 21, and at least two movable contact 21 only drive through a drive assembly 2 moreover, have simplified the structure and the use cost of relay, have improved the suitability of relay.

Optionally, the movable contact plate 21 is bent. Under the condition that two or more movable contact plates 21 are provided, at least two movable contact plates 21 are coaxially connected, that is, the middle parts of at least two movable contact plates 21 are laminated together, in order to realize the flexible contact between the movable contacts at the two ends of the movable contact plates 21 and the stationary contact 11, the movable contact plates 21 can be arranged in a bent shape, the bent shape can be at least one of an arch shape (including a polygonal arch and an arc arch), a zigzag shape and a door shape, and referring to fig. 5 to 8, the movable contact plates 21 are polygonal arch shapes. In the case of two or more movable contact plates 21, the bending shapes of the different movable contact plates 21 may be different, for example, one is in a polygonal arch shape, and the other is in an arc shape.

Alternatively, referring to fig. 4 to 6, two movable contact plates 21 are connected to the driving assembly 2, and the bending directions of the two movable contact plates 21 are opposite.

Specifically, the two movable contact plates 21 may include a first movable contact plate and a second movable contact plate, the first movable contact plate is disposed above the second movable contact plate, as shown in fig. 5, the first movable contact plate is polygonal and bent upward, the second movable contact plate is polygonal and bent downward, and the first movable contact plate and the second movable contact plate are perpendicular to each other, so that the setting size of the driving assembly 2 in the axial direction thereof may be reduced, and the structure of the driving assembly 2 is simplified.

Optionally, two sets of stationary contacts 11 are disposed on the housing 1, and two movable contact plates 21 are connected to the driving assembly 2; the distance between one set of moving contacts and its opposite set of stationary contacts 11 is equal to the distance between the other set of moving contacts and its opposite set of stationary contacts 11, i.e. both sets of moving contacts are in simultaneous contact with both sets of stationary contacts 11 in case the coil assembly 3 drives the driving assembly 2 to move in its axial direction.

Specifically, in order to maintain the uniformity of the relay structure, two sets of the fixed contacts 11 may be disposed on the same side of the housing 1, for example, two sets of the fixed contacts 11 are disposed on the top side of the housing 1, and the ends of the two sets of the fixed contacts 11 close to the moving contact are flush. When the coil assembly 3 drives the driving assembly 2 to move along the axial direction, the two groups of moving contacts are contacted with the two groups of fixed contacts 11 simultaneously, so that the two groups of moving contacts can be arranged in parallel and level, and as shown in fig. 4, the synchronous control between the multiple contacts of the relay is realized.

In addition, two groups of fixed contacts 11 are arranged on the shell 1, and under the condition that two movable contact plates 21 are connected on the driving component 2, the distance between one group of movable contacts and the opposite group of fixed contacts 11 is larger than the distance between the other group of movable contacts and the opposite group of fixed contacts 11, namely under the condition that the coil component 3 drives the driving component 2 to move along the axial direction of the driving component, the movable contacts and the opposite group of fixed contacts 11 are contacted firstly, and the movable contacts and the opposite group of fixed contacts 11 are contacted afterwards, so that the step control among the relay multi-path contacts is realized.

Alternatively, referring to fig. 7 and 8, the driving assembly 2 includes a stationary iron core 22, a movable iron core 23 and a driving shaft 24, the stationary iron core 22 and the movable iron core 23 are connected through an elastic member 25, the elastic member 25 may be a spring or a polymer elastomer, and both the movable contact plate 21 and the movable iron core 23 are connected to the driving shaft 24.

Specifically, the coil of the coil assembly 3 may be disposed on the periphery of the movable iron core 23, when the coil of the coil assembly 3 is energized, the coil and the movable iron core 23 form an electromagnet, a magnetic attraction force is generated between the stationary iron core 22 and the electromagnet, the elastic element 25 is compressed, and the movable iron core 23 drives the driving shaft 24 to move toward the stationary contact 11, so as to achieve the mutual contact between the movable contact and the stationary contact 11; under the condition that the coil of the coil assembly 3 is disconnected with current, the magnetic attraction between the fixed iron core 22 and the movable iron core 23 disappears, and the elastic element 25 in a compressed state can push the movable iron core 23 to move towards the direction far away from the fixed contact 11, so that the movable contact and the fixed contact 11 are disconnected, and the purpose of flexibly controlling the on-off of the relay is achieved.

Alternatively, referring to fig. 1 to 3, each set of stationary contacts 11 may be disposed oppositely, and at least two sets of stationary contacts 11 are disposed on the housing 1 at equal intervals to ensure the structural stability of the relay. When the movable contact plate 21 is configured in a special-shaped structure, such as a zigzag shape, an S shape or an L shape, the movable contacts at two ends of the same movable contact plate 21 may not be opposite, and in order to ensure that each group of the fixed contacts 11 is opposite to the movable contacts at two ends of each movable contact plate 21, each group of the fixed contacts 11 may be arranged in a staggered or non-opposite manner. In addition, a baffle 12 may be disposed on the housing 1, and the baffle 12 is located between the adjacent stationary contacts 11 to improve insulation between the adjacent stationary contacts 11.

Alternatively, referring to fig. 3 and 9, the circumferential side of the stationary contact 11 is provided with a ring magnet 4.

Specifically, the upper case 13 includes an outer case and an inner case, and the inner case may be a ceramic inner case that forms a sealed cavity in which the movable contact makes contact with the stationary contact 11. The fixed contact 11 penetrates through the outer shell and the inner shell, the annular magnet 4 is arranged between the outer shell and the inner shell, the annular magnet 4 can comprise a plurality of plate-shaped magnets 41, the plurality of plate-shaped magnets 41 surround the periphery of the fixed contact 11 at intervals, at least two adjacent plate-shaped magnets 41 are connected through the magnetism gathering cover 42, and the magnetic poles of the two adjacent plate-shaped magnets 41 which are respectively connected with the magnetism gathering cover 42 are different.

In a specific embodiment, referring to fig. 9, the number of the plate-shaped magnets 41 is four, four plate-shaped magnets 41 are disposed around the stationary contact 11, and the magnetic poles of the plate-shaped magnets 41 are disposed toward the direction of the contact current when the movable contact plate 21 and the stationary contact 11 are conducted, so that the arc generated when the movable contact plate 21 is disconnected from the stationary contact 11 is drawn into an arc in the circumferential direction by the electromagnetic force, and the arc has a sufficient space to be drawn longer and thinner. Specifically, referring to fig. 9, the contact current direction when the movable contact plate 21 and the fixed contact 11 are conducted is: the upper and left contact current directions are out of the plane of the paper, and the lower and right contact current directions are in the plane of the paper. The plate-shaped magnets 41 on the left side have outward N poles and inward S poles, the plate-shaped magnets 41 on the right side have inward N poles and outward S poles, the opposite ends of the plate-shaped magnets 41 on the left and right sides have opposite polarities, the plate-shaped magnets 41 on the upper side have outward N poles and inward S poles, the plate-shaped magnets 41 on the lower side have inward N poles and outward S poles, and the plate-shaped magnets 41 on the upper and lower sides have opposite polarities, so that the arcing direction of each set of stationary contacts 11 is consistent along the circumferential direction of the relay. As shown in fig. 9, the left plate-shaped magnet 41 and the lower plate-shaped magnet 41 are connected through the L-shaped magnetism gathering cover 42, so that the magnetic field strength between the left plate-shaped magnet 41 and the lower plate-shaped magnet 41 is increased, the right plate-shaped magnet 41 and the upper plate-shaped magnet 41 are connected through the inverted L-shaped magnetism gathering cover 42, so that the magnetic field strength between the right plate-shaped magnet 41 and the upper plate-shaped magnet 41 is increased, the arc drawing speed is increased, the purpose of rapidly cooling the arc is achieved, and the arc extinguishing effect of the relay is enhanced.

Although some specific embodiments of the present application have been described in detail by way of example, it should be understood by those skilled in the art that the above examples are for illustrative purposes only and are not intended to limit the scope of the present application. It will be appreciated by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the present application. The scope of the application is defined by the appended claims.

Claims (10)

1. A relay, comprising:

the electromagnetic induction type coil assembly comprises a shell (1), a driving assembly (2) and a coil assembly (3), wherein the driving assembly (2) and the coil assembly (3) are arranged in the shell (1), and the coil assembly (3) is in electromagnetic fit with the driving assembly (2);

at least two groups of fixed contacts (11) are arranged on the shell (1), at least two movable contact plates (21) are coaxially connected to the driving assembly (2), each movable contact plate (21) is arranged in a staggered mode and is insulated from each other, and each group of fixed contacts (11) are opposite to the movable contacts at the two ends of each movable contact plate (21);

the movable contact is contacted with the fixed contact (11) under the condition that the coil assembly (3) drives the driving assembly (2) to move along the axial direction of the driving assembly.

2. The relay according to claim 1, characterized in that the movable contact plate (21) is bent.

3. The relay according to claim 2, wherein two movable contact plates (21) are connected to the driving assembly (2), and the bending directions of the two movable contact plates (21) are opposite.

4. The relay according to claim 2, wherein the bent shape comprises at least one of an arch shape, a zigzag shape, and a gate shape.

5. The relay according to claim 2, wherein two sets of said stationary contacts (11) are provided on said housing (1), and two said movable contact plates (21) are connected to said driving assembly (2), the distance between one set of said movable contacts and its opposite set of said stationary contacts (11) being equal to the distance between the other set of said movable contacts and its opposite set of said stationary contacts (11).

6. The relay according to claim 2, wherein two sets of said stationary contacts (11) are provided on said housing (1), and two said movable contact plates (21) are connected to said driving assembly (2), the distance between one set of said movable contacts and its opposite set of said stationary contacts (11) being greater than the distance between the other set of said movable contacts and its opposite set of said stationary contacts (11).

7. The relay according to claim 1, characterized in that each set of said stationary contacts (11) is arranged oppositely, at least two sets of said stationary contacts (11) being arranged on said housing (1) at equal intervals.

8. The relay according to claim 1 or 7, wherein a ring magnet (4) is provided on a peripheral side of the stationary contact (11).

9. The relay according to claim 8, wherein the ring magnet (4) comprises a plurality of plate-shaped magnets (41), the plurality of plate-shaped magnets (41) are spaced around the periphery of the stationary contact (11), at least two adjacent plate-shaped magnets (41) are connected by a flux focusing cover (42), and the magnetic poles of the two adjacent plate-shaped magnets (41) are different from the magnetic poles of the flux focusing cover (42).

10. The relay according to claim 1, characterized in that a baffle (12) is arranged on the housing (1), said baffle (12) being located between adjacent stationary contacts (11).

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