An electromagnetic drive type high-power relay

Abstract

The present application discloses an electromagnetic drive type high-power relay. The electromagnetic drive type high-power relay includes: a housing, an electromagnetic telescopic unit, and a bottom plate; a plurality of pairs of housing contacts are provided on the top side of the housing, and corresponding static contacts are provided on the bottom side of the housing; the electromagnetic telescopic unit is fixed on the bottom plate, and the movable end of the electromagnetic telescopic unit is connected to a plurality of movable contact plates through an insulating block, and one movable contact plate corresponds to a pair of static contacts; the electromagnetic telescopic unit is configured to drive the movable contact plate to achieve electrical connection or disconnection of the corresponding static contacts. Through the structural arrangement of the present application, the application scenarios of controlling high power of two-phase / three-phase electricity are satisfied, the problems of heat generation and heat dissipation related to the relay can be reduced, and the problem of continuous power consumption during the operation of the relay can also be solved.

Description

Technical Field

[0001] This application belongs to the technical field of relays, and particularly relates to an electromagnetic drive high-power relay. Background Art

[0002] At present, high-power relays mainly include electromagnetic relays and solid-state relays.

[0003] For electromagnetic relays, due to the continuous friction and collision of mechanical components such as armatures and contacts inside them during frequent suction and release processes, as well as factors such as arc discharge, oxidation, and increased contact resistance, it directly affects the performance and service life of the relay. Moreover, the coil of the relay generates a magnetic field when energized, and this magnetic field may interfere with surrounding electronic components and affect their normal operation. In addition, the relay consumes power continuously during operation and generates heat, so corresponding heat dissipation measures need to be taken.

[0004] For solid-state relays, semiconductor devices are used to achieve the switching function. Although they have advantages such as fast response, no noise, no contact wear, and strong anti-interference ability, they also have problems of continuous power consumption and heat dissipation. Moreover, the larger the overcurrent, the larger the radiator required.

[0005] This application intends to study an electromagnetic drive high-power relay, which can meet the application scenarios of controlling high power of two-phase / three-phase electricity, reduce the related heating and heat dissipation problems of the relay, and also solve the problem of continuous power consumption during the operation of the relay. Summary of the Invention

[0006] The purpose of the present invention is: to overcome the problems of the prior art, an electromagnetic drive high-power relay is disclosed. Through the structural settings of this application, it meets the application scenarios of controlling high power of two-phase electricity, can reduce the related heating and heat dissipation problems of the relay, and also solve the problem of continuous power consumption during the operation of the relay.

[0007] The purpose of the present invention is achieved by the following technical solutions:

[0008] An electromagnetic drive high-power relay, the high-power relay includes: a housing, an electromagnetic telescopic unit, and a bottom plate;

[0009] Several pairs of housing contacts are provided on the top side of the housing, and corresponding static contacts are provided on the bottom side of the housing;

[0010] The electromagnetic telescopic unit is fixed on the bottom plate, and the movable end of the electromagnetic telescopic unit is connected to several movable contact plates through an insulating block, and one movable contact plate corresponds to a pair of static contacts;

[0011] The electromagnetic telescopic unit is configured to drive the movable contact plate to achieve electrical connection or disconnection of the corresponding static contact.

[0012] According to a preferred embodiment, the magnetostrictive unit includes a self-locking housing and a telescopic column.

[0013] The self-locking housing is fixed on the bottom plate.

[0014] The movable end of the telescopic column is fixedly connected to the body part of a cuboid located inside the self-locking housing. The movable end extends out of the self-locking housing through the through hole at the top of the self-locking housing and can perform telescopic movement relative to the self-locking housing.

[0015] According to a preferred embodiment, four vertically arranged buckle columns are provided at the bottom end of the body part of the telescopic column. The buckle columns are located at the four top corners of the bottom end of the body part of the telescopic column.

[0016] An iron sheet is fixedly connected to the bottom end of the buckle column.

[0017] A cross-shaped fixing plate is fixed to the inner side of the cavity of the self-locking housing, and the fixing plate is arranged between the body part of the telescopic column and the iron sheet. Each buckle column passes through the fixing plate through the gap around the fixing plate.

[0018] A spring is further provided at the bottom end of the body part of the telescopic column. The spring is fixedly connected to the upper surface of the fixing plate, and the spring is in a compressed state.

[0019] On the surface of the body part of the telescopic column in the axial direction, a guiding protrusion, a first V-shaped limiting structure, and a second V-shaped limiting structure are further provided. The guiding protrusion is located at the top side of the V-shaped opening of the first V-shaped limiting structure. The first V-shaped limiting structure is located at the top side of the second V-shaped limiting structure, and the V-shaped opening of the second V-shaped limiting structure is wider than the V-shaped opening of the first V-shaped limiting structure.

[0020] A hook is further provided on the fixing plate. The bottom end of the hook is connected to the surface of the fixing plate, and the top end of the hook is selectively hooked to the first V-shaped limiting structure and the second V-shaped limiting structure.

[0021] The magnetostrictive unit further includes an electromagnet. The electromagnet is arranged at the bottom end of the iron sheet and fixed on the bottom plate, and acts on the iron sheet through instantaneous magnetic force to drive the telescopic column to move.

[0022] According to a preferred embodiment, under the action of the magnetic force of the electromagnet, when the hook is hooked to the first V-shaped limiting structure, the telescopic column is in a shortened state. At this time, the movable end drives the contact plate to just disconnect from the static contact.

[0023] According to a preferred embodiment, under the action of the magnetic force of the electromagnet, when the hook is hooked to the second V-shaped limiting structure, the telescopic column is in an extended state. At this time, the movable end drives the contact plate to connect with the static contact.

[0024] According to a preferred embodiment, one end of the static contact is fixed to the housing contact, and the other end of the static contact is provided with a toothed contact surface.

[0025] According to a preferred embodiment, the two ends of the moving contact plate are provided with toothed contact surfaces; when the moving contact plate contacts the two static contacts, the toothed contact surfaces at both ends of the moving contact plate respectively match and contact the toothed contact surfaces of the two static contacts.

[0026] According to a preferred embodiment, contact guide grooves are further provided on the inner side walls of both sides of the housing, and the movement of the moving contact plate is guided through the contact guide grooves.

[0027] The main solution of the present application and its various further alternative solutions can be freely combined to form multiple solutions, all of which are solutions that can be adopted and claimed in the present application. Those skilled in the art can understand that there are various combinations according to the prior art and common general knowledge after understanding the solution of the present application, all of which are the technical solutions to be protected in the present application, and will not be enumerated here.

[0028] Advantages of the present application:

[0029] By providing toothed contacts in the present application, the contact area is increased, the contact resistance is reduced, the heat generation is reduced, and the reliability and service life in high-power scenarios are improved. The electromagnetic telescopic unit can be stably locked after the moving contact plate is connected to the toothed static contact, without continuous power consumption, solving the problem of continuous power consumption during the operation of the relay. Description of the drawings

[0030] Figure 1 is an exploded structural schematic diagram of the electromagnetic drive type high-power relay of the present application;

[0031] Figure 2 is a schematic diagram of the connection relationship of the telescopic column of the electromagnetic drive type high-power relay of the present application;

[0032] Figure 3 is a schematic diagram of the connection relationship between the self-locking housing and the fixing plate in the electromagnetic drive type high-power relay of the present application;

[0033] Among them, 1 - housing contact, 2 - housing, 3 - static contact, 4 - contact guide groove, 5 - insulating block, 6 - moving contact plate, 7 - electromagnetic telescopic unit, 8 - bottom plate, 9 - self-locking housing, 10 - fixing plate, 11 - telescopic column, 11a - movable end, 11b - first V-shaped limiting structure, 11c - second V-shaped limiting structure, 11d - guiding protrusion, 12 - hook, 13 - spring, 14 - buckle column, 15 - iron sheet, 16 - electromagnet. Detailed implementation manners

[0034] The following describes the implementation modes of the present application through specific examples. Those skilled in the art can easily understand other advantages and effects of the present application from the content disclosed in this specification. The present application can also be implemented or applied through other different specific implementation modes. Various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present application. It should be noted that, without conflict, the following embodiments and the features in the embodiments can be combined with each other.

[0035] It should be noted that: Similar reference numerals and letters indicate similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0036] In the description of the present application, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of this application is usually placed during use. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present application. In addition, the terms "first", "second", "third", etc. are only used for descriptive distinction and cannot be understood as indicating or implying relative importance.

[0037] In addition, the terms "horizontal", "vertical", "hanging", etc. do not mean that the components are required to be absolutely horizontal or hanging, but can be slightly inclined. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0038] In the description of the present application, it should also be noted that unless otherwise clearly specified and limited, the terms "set", "installed", "connected", "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific situations.

[0039] In addition, the present application points out that in the present application, if the specific structures, connection relationships, positional relationships, power source relationships, etc. involved are not specifically written, then the structures, connection relationships, positional relationships, power source relationships, etc. involved in the present application are all known to those skilled in the art on the basis of the prior art without creative labor.

[0040] ReferenceFigures 1 to 3 As shown in the figure, an electromagnetically driven high-power relay is shown, and the high-power relay includes: a housing 2, an electromagnetic telescopic unit 7 and a base plate 8.

[0041] A plurality of pairs of shell contacts 1 are provided on the top side of the shell 2, and a corresponding number of static contacts 3 are provided on the bottom side of the shell 2; an electromagnetic telescopic unit 7 is fixed on a bottom plate 8, and a movable end of the electromagnetic telescopic unit 7 is connected to a plurality of moving contact plates 6 via an insulating block 5, and one moving contact plate 6 corresponds to a pair of static contacts 3; the electromagnetic telescopic unit 7 is configured to drive the moving contact plate 6 to realize the electrical connection or disconnection of the corresponding static contacts 3.

[0042] Preferably, one end of the static contact 3 is fixed on the housing contact 1 , and the other end of the static contact 3 is provided with a toothed contact surface.

[0043] Preferably, toothed contact surfaces are provided at both ends of the moving contact plate 6; when the moving contact plate 6 contacts the two stationary contacts 3, the toothed contact surfaces at both ends of the moving contact plate 6 respectively match and contact with the toothed contact surfaces of the two stationary contacts 3.

[0044] In the present application, the moving contact plate 6 and the static contact 3 are both made of materials with good conductive properties. The contacts of the moving contact plate 6 and the static contact 3 are designed in a tooth shape, which greatly increases the contact area and reduces the contact resistance. In high-power usage scenarios, it can effectively reduce heat generation, maintain a stable operating temperature, and improve the performance and reliability of the relay.

[0045] Preferably, contact guide grooves 4 are further provided on the inner side walls of both sides of the housing 2, and the movable contact plate 6 is guided by the contact guide grooves 4. Furthermore, the contact guide grooves 4 are made of plastic with good wear resistance and insulation.

[0046] The present application ensures that the moving contact plate 6 can be smoothly and accurately connected or disconnected with the static contact 3 when moving up and down through the contact guide groove 4 .

[0047] Preferably, the electromagnetic telescopic unit 7 includes a self-locking shell 9 and a telescopic column 11, the self-locking shell 9 is fixed on the bottom plate 8, the movable end 11a of the telescopic column 11 is fixedly connected to the main body of the rectangular block located in the self-locking shell 9, the movable end 11a extends out of the self-locking shell 9 through the through hole at the top end of the self-locking shell 9, and can perform telescopic movements relative to the self-locking shell 9.

[0048] Preferably, four vertically arranged snap-in columns 14 are provided at the bottom end of the main body of the telescopic column 11 , and the snap-in columns 14 are located at four top corners of the bottom end of the main body of the telescopic column 11 ; an iron sheet 15 is fixedly connected to the bottom end of the snap-in columns 14 .

[0049] Preferably, a cross-shaped fixing plate 10 is fixed inside the cavity of the self-locking housing 9, and the body part of the telescopic column 11 is arranged between the fixing plate 10 and the iron sheet 15, and each buckle column 14 passes through the fixing plate 10 through the gap around the fixing plate 10.

[0050] Preferably, a spring 13 is further arranged at the bottom end of the body part of the telescopic column 11. The spring 13 is fixedly connected to the upper surface of the fixing plate 10, and the spring 13 is always in a compressed state.

[0051] Preferably, a guiding protrusion 11d, a first V-shaped limiting structure 11b and a second V-shaped limiting structure 11c are further arranged on the surface of the body part of the telescopic column 11 in the axial direction. The guiding protrusion 11d is located at the top side of the V-shaped opening of the first V-shaped limiting structure 11b. The first V-shaped limiting structure 11b is located at the top side of the second V-shaped limiting structure 11c, and the V-shaped opening of the second V-shaped limiting structure 11c is wider than the V-shaped opening of the first V-shaped limiting structure 11b.

[0052] Preferably, a hook 12 is further arranged on the fixing plate 10. The bottom end of the hook 12 is connected to the surface of the fixing plate 10, and the top end of the hook 12 is selectively hooked to the first V-shaped limiting structure 11b or the second V-shaped limiting structure 11c.

[0053] Preferably, the electromagnetic telescopic unit 7 further includes an electromagnet 16. The electromagnet 16 is arranged at the bottom end of the iron sheet 15 and fixed on the bottom plate 8, and acts on the iron sheet 15 through instantaneous magnetic force to drive the telescopic column 11 to move.

[0054] Specifically, under the magnetic force of the electromagnet 16, when the hook 12 is hooked to the first V-shaped limiting structure 11b, the telescopic column 11 is in a shortened state. At this time, the moving end 11a drives the contact plate 6 to be just disconnected from the static contact 3.

[0055] Under the magnetic force of the electromagnet 16, when the hook 12 is hooked to the second V-shaped limiting structure 11c, the telescopic column 11 is in an extended state. At this time, the moving end 11a drives the contact plate 6 to be connected to the static contact 3.

[0056] In a specific embodiment, selecting an electromagnet 16 with a relatively high power and cooperating with self-locking are the keys to ensuring its performance. When selecting the electromagnet 16, the focus should be on the magnitude of its instantaneous current. High power means that a sufficiently large current can be generated at the moment of startup, and the force generated by this strong current should be sufficient to pull the telescopic column 11. The ingenious design of this electromagnetic telescopic unit 7 lies in that once it is started and the telescopic column 11 is pulled, continuous power supply is no longer required, and the telescopic column 11 will maintain its current position. Specifically, the telescopic column 11 fixes the insulating block 5 to control the up and down movement of the entire toothed movable contact plate 6. When power is applied instantaneously, the electromagnet 16 pulls the iron sheet 15 by the instantaneous large suction force. The lower end of the spring 13 is fixed on the fixed plate 10. At this time, the spring 13 is compressed, and the hook 12 slides upward along the second V-shaped limiting structure 11c and slides above the first V-shaped limiting structure 11b, and then loses the pulling force of the electromagnet 16 and is stuck in the first V-shaped limiting structure 11b part under the elastic force of the spring 13. At this time, the telescopic column 11 is in a shortened state; when power is applied again, the electromagnet 16 pulls the iron sheet 15 by the instantaneous large suction force, the hook 12 slides above the first V-shaped limiting structure 11b, and slides to the side under the traction of the guiding protrusion 11d, and then loses the pulling force of the electromagnet 16 and slides back to the original first V-shaped limiting structure 11b under the elastic force of the spring 13. At this time, the telescopic column 11 is in an extended state, and the on-off control of the toothed movable contact plate 6 and the toothed static contact 3 is realized.

[0057] Using electricity magnetism as the driving source, the electromagnetic telescopic unit 7 of the self-locking switch type is controlled by the instantaneous current to drive the movable contact plate to realize the on and off of the circuit. This driving method is accurate and reliable and has a built-in locking function, especially suitable for high-power application scenarios.

[0058] The above are only the preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. An electromagnetically driven high-power relay, characterized in that: The high-power relay comprises: a housing (2), an electromagnetic telescopic unit (7) and a base plate (8); A plurality of pairs of housing contacts (1) are provided on the top side of the housing (2), and a corresponding number of stationary contacts (3) are provided on the bottom side of the housing (2); The electromagnetic telescopic unit (7) is fixed on the bottom plate (8), and the movable end (11a) of the electromagnetic telescopic unit (7) is connected to a plurality of movable contact plates (6) via an insulating block (5), and one movable contact plate (6) corresponds to a pair of stationary contacts (3); The electromagnetic telescopic unit (7) is configured to drive the moving contact plate (6) to achieve electrical connection or disconnection of the corresponding static contact (3); The electromagnetic telescopic unit (7) comprises a self-locking housing (9) and a telescopic column (11); The self-locking housing (9) is fixed on the bottom plate (8). The movable end (11a) of the telescopic column (11) is fixedly connected to a main body of a rectangular parallelepiped located in the self-locking housing (9); the movable end (11a) extends out of the self-locking housing (9) through a through hole at the top end of the self-locking housing (9) and is capable of telescopic movement relative to the self-locking housing (9); The bottom end of the main body of the telescopic column (11) is provided with four vertically arranged snap-in columns (14), and the snap-in columns (14) are located at four top corners of the bottom end of the main body of the telescopic column (11); The bottom end of the buckle column (14) is fixedly connected to an iron sheet (15); A cross-shaped fixing plate (10) is fixed inside the cavity of the self-locking housing (9), and the fixing plate (10) is arranged between the main body of the telescopic column (11) and the iron sheet (15), and each buckle column (14) passes through the fixing plate (10) through the gap around the fixing plate (10); A spring (13) is also provided at the bottom end of the main body of the telescopic column (11), the spring (13) being connected and fixed to the upper surface of the fixing plate (10), and the spring (13) is in a compressed state; A guide protrusion (11d), a first V-shaped limiting structure (11b) and a second V-shaped limiting structure (11c) are also provided on the surface of the main body of the telescopic column (11) in the axial direction, the guide protrusion (11d) is located at the top side of the V-shaped opening of the first V-shaped limiting structure (11b), the first V-shaped limiting structure (11b) is located at the top side of the second V-shaped limiting structure (11c), and the V-shaped opening of the second V-shaped limiting structure (11c) is wider than the V-shaped opening of the first V-shaped limiting structure (11b); The fixing plate (10) is further provided with a hook (12), the bottom end of the hook (12) is connected to the surface of the fixing plate (10), and the top end of the hook (12) is selectively hooked to the first V-shaped limiting structure (11b) and the second V-shaped limiting structure (11c); The electromagnetic telescopic unit (7) further comprises an electromagnet (16), which is arranged at the bottom end of the iron sheet (15) and fixed on the bottom plate (8), and acts on the iron sheet (15) through instantaneous magnetic force to drive the telescopic column (11) to move.

2. The electromagnetically driven high-power relay according to claim 1, characterized in that: Under the action of the magnetic force of the electromagnet (16), when the hook (12) is hooked to the first V-shaped limiting structure (11b), the telescopic column (11) is in a shortened state, at which time the movable end (11a) drives the contact plate (6) to be disconnected from the static contact (3).

3. The electromagnetically driven high-power relay according to claim 1, characterized in that: Under the action of the magnetic force of the electromagnet (16), when the hook (12) is hooked to the second V-shaped limiting structure (11c), the telescopic column (11) is in an extended state, and at this time the movable end (11a) drives the contact plate (6) to connect with the static contact (3).

4. The electromagnetically driven high-power relay according to claim 1, characterized in that: One end of the stationary contact (3) is fixed to the housing contact (1), and the other end of the stationary contact (3) is provided with a toothed contact surface.

5. The electromagnetically driven high-power relay according to claim 4, characterized in that: The moving contact plate (6) has toothed contact surfaces at both ends; When the moving contact plate (6) contacts the two stationary contacts (3), the toothed contact surfaces at both ends of the moving contact plate (6) respectively match and contact the toothed contact surfaces of the two stationary contacts (3).

6. The electromagnetically driven high-power relay according to claim 1, characterized in that: Contact guide grooves (4) are also provided on the inner side walls on both sides of the housing (2), and the movable contact plate (6) is guided by the contact guide grooves (4).

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