CN115642057A

CN115642057A - Electromagnetic relay resistant to large load

Info

Publication number: CN115642057A
Application number: CN202211366388.8A
Authority: CN
Inventors: 彭碧辉; 虞彭鑫; 林煜博
Original assignee: Zhejiang Meishuo Electric Technology Co ltd
Current assignee: Zhejiang Meishuo Electric Technology Co ltd
Priority date: 2022-10-31
Filing date: 2022-10-31
Publication date: 2023-01-24

Abstract

The invention discloses a large-load-resistant electromagnetic relay, which comprises a magnetic circuit driving assembly, a movable contact piece structure, a static contact piece structure and a transmission assembly, wherein the magnetic circuit driving assembly is arranged on a base, the transmission assembly comprises an armature component which can be arranged on the magnetic circuit driving assembly in a swinging mode and a slider structure which can be arranged on the base in a reciprocating mode, the movable contact piece structure comprises a spring piece component which is in linkage fit with the slider structure, and the armature component is connected with the slider structure through a driving part which extends obliquely.

Description

Electromagnetic relay resistant to large load

Technical Field

The invention relates to the technical field of low-voltage electric appliances, in particular to a large-load-resistant electromagnetic relay.

Background

An electromagnetic relay is an electronic control device having a control system (also called an input loop) and a controlled system (also called an output loop), and is generally applied to an automatic control circuit, and actually is an automatic switch for controlling a larger current and a higher voltage by using a smaller current and a lower voltage. Therefore, the circuit plays the roles of automatic regulation, safety protection, circuit conversion and the like.

The existing electromagnetic relay generally comprises a base, a magnetic circuit part, a contact part and a push rod arranged between the magnetic circuit part and the contact part, wherein the contact part consists of a movable spring and a static spring which are inserted on the base, the push rod is driven by an armature in the magnetic circuit part, the installation mode of the push rod generally adopts the following two modes, for example, chinese patent document CN212062311U discloses a clapper type electromagnetic relay which comprises a base, an electromagnetic component, a push piece and a contact part, wherein the electromagnetic component is arranged on the base, the electromagnetic component comprises an iron core coil, the armature and a framework for installing the armature, the lower end of the push piece is rotatably installed on the base, one side of the push piece is provided with a push plate which interacts with the armature, the other side of the push piece is provided with a push rod which interacts with the contact part, the lower end of the push piece is arranged into a circular rotating shaft, and the push piece has a complex structure, a larger volume and a large installation occupied space, and is not beneficial to the miniaturization development of products. Still like chinese patent document CN 207719106U discloses a power relay, including the housing, a pedestal, armature, yoke, the push rod, normally closed static spring, normally open static spring and movable spring, armature and yoke link together through the shell fragment, wherein, the armature vertical section passes through the connecting hole and links to each other with the armature link of push rod, the movable spring link of push rod links to each other with the connecting hole of movable spring, the push rod middle part is equipped with the insulating barrier, be the push rod for it erects between armature and movable spring that the horizontal form is to be the push rod, this kind of push rod easily takes place position collision interference phenomenon between armature, lead to the push rod to take place the phenomenon of falling easily in the installation, this kind of push rod mounting structure is complicated, increase the installation degree of difficulty, the installation effectiveness is low, be unfavorable for the automated production of product like this.

In summary, the conventional electromagnetic relay usually adopts the two installation methods of the push rod, and is difficult to change greatly due to the limitations of the structure and space of the electromagnetic relay, but the following problems still exist in practical application: the structure of this kind of push rod sets up complicacy, and the volume is done great to and install also comparatively loaded down with trivial details at the base, mounting structure is complicated, and assembly efficiency is low, is unfavorable for control manufacturing cost, has also increaseed automated production's the degree of difficulty. Therefore, on the premise of meeting the basic performance requirements of relay products, technicians need to develop an electromagnetic relay product which is simple in mounting structure, small in occupied space, good in action reliability and beneficial to automatic production and assembly at the present stage.

Disclosure of Invention

The invention aims to solve the technical problems that in the prior art, the push rod structure is complex in arrangement and large in size, the process of mounting the push rod on the base is complex, the mounting structure is complex, and the control of production cost is not facilitated, so that the electromagnetic relay which optimizes the product structure layout, is simple in mounting structure, improves the assembly efficiency, is beneficial to reducing the product size and reduces the production cost is provided.

In order to solve the problems, the invention provides a large-load-resistant electromagnetic relay, which comprises a base, a magnetic circuit driving assembly, a movable contact piece structure, a static contact piece structure and a transmission assembly, wherein the magnetic circuit driving assembly, the movable contact piece structure and the static contact piece structure are arranged on the base, the transmission assembly is movably arranged between the magnetic circuit driving assembly and the movable contact piece structure, the transmission assembly comprises an armature component which can be arranged on the magnetic circuit driving assembly in a swinging mode and a slider structure which can be arranged on the base in a reciprocating mode, the movable contact piece structure comprises a spring component which is in linkage fit with the slider structure, the spring component is arranged opposite to the static contact piece structure, the armature component is provided with a driving part which extends towards one side of the slider structure in an inclined mode by a set length, and the slider structure is connected with the driving part through a limiting structure; when the armature part is sucked and swung by the magnetic circuit driving assembly, the sliding block structure is pushed to move, so that the sliding block structure drives the spring assembly to be contacted with the static contact piece structure.

In the electromagnetic relay, the base is provided with an installation sliding groove extending along the length direction of the base, the slider structure is movably accommodated in the installation sliding groove, and a guide structure for guiding the slider structure to move along the length direction of the base is arranged between the installation sliding groove and the slider structure.

In the above electromagnetic relay, the guide structure includes a guide groove extending in the same direction as the mounting chute and disposed in the mounting chute, and a guide projection disposed at the bottom of the slider structure and slidably connected to the guide groove, and the guide groove extends out of one end of the mounting chute and extends to the static contact structure.

In the electromagnetic relay, the limit structure comprises a limit slot arranged on the slider structure, and one end of the driving part is inserted into the limit slot.

In the electromagnetic relay, the magnetic circuit driving assembly comprises a driving coil and a yoke, the armature component is connected to the upper end of the yoke in an L-shaped swinging manner, and a spring plate structure is arranged between the armature component and the yoke; the driving part is an inclined plate structure formed by reducing the width of one end of the armature part and then extending downwards.

In the electromagnetic relay, the base includes two mounting bosses formed on two sides of the mounting chute, the movable contact spring structure includes a conductive bracket erected on the two mounting bosses, the spring assembly includes two movable contact springs symmetrically arranged on the conductive bracket, one ends of the two movable contact springs are respectively fixed on the conductive bracket, and the other ends of the two movable contact springs extend to the lower part of the conductive bracket and are linked with the slider structure through a positioning structure.

In the electromagnetic relay, the positioning structure comprises two positioning hooks arranged on two sides of the front end of the sliding block structure and two hook grooves arranged on the two positioning hooks, and the other ends of the two movable springs are respectively positioned and inserted in the two hook grooves.

In the electromagnetic relay, the conductive support comprises two vertical plate parts respectively connected with the two movable spring pieces, a middle separation groove formed between the two vertical plate parts and extending to the top of the conductive support, and a connecting part connected to the bottoms of the two vertical plate parts, two mounting grooves are formed in the two mounting bosses, two mounting clamping pins respectively inserted into the two mounting grooves are bent and formed on the bottom edge of the connecting part, and a U-shaped current path passing through the two vertical plate parts and the connecting part is formed between the two movable spring pieces.

In the electromagnetic relay, the static contact piece structure comprises two static conductive pieces which are arranged on the base at intervals corresponding to the two movable spring pieces, two pairs of movable contacts and static contacts are respectively arranged on the two static conductive pieces and the two movable spring pieces in an opposite mode, and the bottoms of the two static conductive pieces are bent and formed with the pin ends penetrating through the bottom of the base.

In the electromagnetic relay, the base is provided with an installation partition plate blocking the other end of the installation chute, and the magnetic circuit driving assembly and the slider structure are respectively arranged on two sides of the installation partition plate; the armature component is arranged on the base in a sleeved mode, and the armature component is arranged on the conductive support in a sleeved mode.

Compared with the prior art, the technical scheme of the invention has the following advantages:

1. in the large-load-resistant electromagnetic relay, the base is provided with the slider structure capable of moving in a reciprocating manner, then when the armature component and the movable contact piece structure are assembled, the armature component is connected with the slider structure through the obliquely extending driving part, and the movable contact piece structure is in linkage fit with the slider structure through the spring piece assembly, so that the slider structure designed by reciprocating movement is utilized to transmit motion and force between the armature component and the spring piece assembly, when the magnetic circuit driving assembly is electrified to generate electromagnetic force, the armature component is attracted and swings, the slider structure drives the spring piece assembly to be in contact with the static contact piece structure under the pushing of the armature component, and when the magnetic circuit driving assembly is powered off, the slider component resets and moves under the elastic force action of the spring piece assembly.

2. According to the electromagnetic relay with high load resistance, the installation sliding groove is formed in the base in an extending mode along the length direction of the base, the sliding block structure can be arranged in the installation sliding groove in a reciprocating mode through the guide structure, the installation guide and motion guide effects are achieved on the sliding block structure on the base through the design of the installation sliding groove and the guide structure, the sliding block structure is guaranteed to move in the installation sliding groove in the reciprocating mode along the length direction of the base, the position deviation phenomenon in the reciprocating moving process of the sliding block structure is prevented, the transmission motion between the coil component and the spring piece component can be reliably achieved, and the installation stability is good.

3. According to the electromagnetic relay with the large load resistance, the limit slot is arranged on the sliding block structure, one end of the driving part is inserted into the limit slot, so that the transmission connection between the armature component and the sliding block structure is realized, and the driving part is the inclined plate structure which is formed by reducing the width of one end of the armature component and then extending downwards, so that the design can meet the transmission distance requirement between the armature component and the sliding block structure, the installation and the connection are convenient, and the matching transmission is reliable.

4. In the electromagnetic relay with high load resistance, the two positioning hooks are arranged on the two sides of the front end of the sliding block structure, the two positioning hooks are respectively provided with the hook grooves, the other ends of the two movable springs are respectively positioned and inserted in the two hook grooves, the other ends of the movable springs are prevented from being separated from the positioning hooks through the positioning fit formed between the two positioning hooks and the two movable springs, the installation stability is good, the positioning structure design realizes the linkage fit between the sliding block structure and the two movable springs, the two movable springs are driven by the sliding block structure to synchronously elastically deflect towards one side close to the two static conductive sheets, and when the movable springs are disconnected with the static conductive sheets, the sliding block structure can realize reset movement under the action of the elastic force of the two movable springs.

5. In the electromagnetic relay with large load resistance, when two movable reeds are in contact with two static conductive sheets for electrification, current is input from one static conductive sheet, then is transmitted between the two movable reeds and the conductive support and then is output from the other static conductive sheet, and according to the fact that the conductive support is composed of the two vertical plate parts and the connecting part, a U-shaped current path passing through the two vertical plate parts and the connecting part is formed between the two movable reeds, the cross section area of the current passing through the movable reeds and the conductive support is increased, the passable current is large, the temperature rise of a contact is reduced, the relay product can break the load of high voltage and large current, and the service performance of the product is improved.

6. In the electromagnetic relay with high load resistance, the insulating baffle inserted between the two mounting bosses is arranged on the housing, and the armature component is separated from the conductive support by the insulating baffle, so that the electrical gap between the armature component and the conductive support is enlarged, the phenomenon of arc flashover and creepage is prevented, and the overvoltage performance of a product is improved.

Drawings

In order to more clearly illustrate the detailed description of the invention or the technical solutions in the prior art, the drawings that are needed in the detailed description of the invention or the prior art will be briefly described below.

Fig. 1 is a schematic perspective view of a heavy load resistant electromagnetic relay according to the present invention;

fig. 2 is a schematic cross-sectional view of a heavy-load resistant electromagnetic relay according to the present invention;

fig. 3 is a schematic structural view of the electromagnetic relay shown in fig. 1 after hiding the base;

FIG. 4 is a schematic view of the connection of the armature member and the push block structure of the present invention;

FIG. 5 is a schematic structural diagram of the moving contact spring structure of the present invention;

FIG. 6 is a schematic view of the base of the present invention;

description of the reference numerals: 1. a base; 11. installing a chute; 12. a guide groove; 13. mounting a boss; 14. installing a partition plate; 2. a static contact structure; 21. a static conductive sheet; 22. a lead terminal; 3. a movable contact spring structure; 31. a reed assembly; 311. a movable spring plate; 32. a conductive support; 321. a vertical plate portion; 322. a connecting portion; 323. installing a clamping pin; 4. a slider structure; 41. a guide projection; 5. a positioning hook; 51. a hook groove; 6. limiting slots; 7. an armature member; 71. a drive section; 8. a magnetic circuit driving assembly; 81. a drive coil; 82. a yoke iron; 83. elastic tabletting; 9. a housing; 91. an insulating barrier.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it is to be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in a specific case to those of ordinary skill in the art.

Example 1

The present embodiment is described in detail below with reference to the accompanying drawings:

the present embodiment provides a large load-resistant electromagnetic relay as shown in fig. 1-6, which includes a base 1, and a magnetic circuit driving assembly 8, a movable contact piece structure 3, a static contact piece structure 2 arranged on the base 1, and a transmission assembly movably arranged between the magnetic circuit driving assembly 8 and the movable contact piece structure 3, and is characterized in that: the transmission assembly comprises an armature part 7 which can be arranged on the magnetic circuit driving assembly 8 in a swinging mode and a sliding block structure 4 which can be arranged on the base 1 in a reciprocating mode, the movable contact spring structure 3 comprises a spring component 31 which is in linkage fit with the sliding block structure 4, the spring component 31 is arranged opposite to the static contact spring structure 2, the armature part 7 is provided with a driving part 71 which extends towards one side of the sliding block structure 4 in an inclined mode for a set length, and the sliding block structure 4 is connected with the driving part 71 through a limiting structure; when the armature component 7 is attracted and swung by the magnetic circuit driving component 8, the sliding block structure 4 is pushed to move, so that the sliding block structure 4 drives the spring component 31 to be contacted with the static contact piece structure 2.

In the above embodiment, by providing the slider structure capable of moving back and forth on the base 1, and then when assembling the armature component 7 and the moving contact piece structure 3, the armature component 7 is connected to the slider structure 4 through the obliquely extending driving portion 71, and the moving contact piece structure 3 is in linkage fit with the slider structure 4 through the spring piece assembly 31, so that the slider structure 4 designed by moving back and forth transfers motion and force between the armature component 7 and the spring piece assembly 31, when the magnetic circuit driving assembly is energized to generate electromagnetic force, the armature component 7 is attracted to swing, the slider structure 4 drives the spring piece assembly 31 to contact with the static contact piece structure 2 under the pushing of the armature component 7, and when the magnetic circuit driving assembly is de-energized, the slider component is reset to move under the elastic force of the spring piece assembly 31.

In order to ensure the stability and reliability of the reciprocating movement of the slider structure 4 on the base 1, a mounting chute 11 is extended along the length direction of the base 1, the slider structure 4 is movably accommodated in the mounting chute 11, a guiding structure for guiding the slider structure 4 to move along the length direction of the base 1 is arranged between the mounting chute 11 and the slider structure 4, as a specific structure, the guiding structure comprises a guiding groove 12 extended in the same direction as the mounting chute 11 and arranged in the mounting chute 11, and a guiding projection 41 arranged at the bottom of the slider structure 4 and slidably connected to the guiding groove 12, wherein the guiding groove 12 extends out of one end of the mounting chute 11 and extends to the static contact piece structure 2. According to the structure, the slider structure 4 plays a role in installation guiding and motion guiding on the base through the design of the installation sliding groove and the guiding structure, the slider structure 4 is ensured to move back and forth in the installation sliding groove along the length direction of the base, so that the position deviation phenomenon in the back and forth movement process of the slider structure is prevented, the slider structure can lean against the coil component and the spring component to transfer motion, and the installation stability is good.

In the present embodiment, as shown in fig. 3 to 4, the magnetic circuit driving assembly 8 includes a driving coil 81 and a yoke, the armature component 7 is connected to an upper end of the yoke 82 in an L-shaped swing manner, and an elastic pressing piece 83 is disposed between the driving coil 81 and the yoke 82, when the driving coil is energized, an electromagnetic force for attracting the armature component 7 is generated by the driving coil 81, so that the armature component 7 pushes the slider structure 4 to move toward the side close to the stationary contact structure 2 under the electromagnetic force. According to the driving part 71 arranged on the armature part and the sliding block structure 4, the driving part 71 is connected with the sliding block structure 4 through the limiting structure, the limiting structure comprises a limiting slot 6 arranged on the sliding block structure 4, one end of the driving part 71 is obliquely inserted into the limiting slot 6, the limiting slot is positioned at the rear end part of the sliding block structure, so that the transmission connection between the armature part 7 and the sliding block structure 4 is realized, the structure is simple, the installation is convenient and fast, and according to the inclined plate structure formed by extending downwards after the width of the driving part 71 is reduced by one end of the armature part 7, the design can meet the requirement of the transmission distance between the armature part 7 and the sliding block structure 4.

The specific arrangement of the moving contact structure and the sliding block structure is described in detail below with reference to fig. 1-3:

the base 1 includes two mounting bosses 13 formed on both sides of the mounting chute 11, and the movable contact spring structure 3 includes a conductive bracket 32 erected on the two mounting bosses 13, so that the conductive bracket 32 is configured to be positioned above the slider structure 4 so as not to interfere with the reciprocating movement of the slider structure 4 in the mounting chute. The spring assembly 31 comprises two movable springs 311 symmetrically arranged on the conductive support 32, one ends of the two movable springs 311 are respectively fixed on the conductive support 32, the other ends of the two movable springs extend to the lower side of the conductive support 32 and are linked with the slider structure 4 through a positioning structure, the movable springs are formed by overlapping a plurality of springs and can elastically deform and deflect under a pressed state, the static contact piece structure 2 comprises two static conductive pieces 21 which are arranged on the base 1 at intervals corresponding to the two movable springs, the two static conductive pieces 21 and the two movable springs are respectively provided with two pairs of movable contacts and static contacts in an opposite mode, the bottoms of the two static conductive pieces 21 are bent and formed to be provided with guide pin ends 22 penetrating through the bottom of the base 1, and the two static conductive pieces 21 are connected with a circuit board in an installing mode through the respective guide pin ends 22. In this way, when the driving coil 81 is powered on to operate, the armature component 7 is driven by electromagnetic force to push the slider structure 4 to move, the two movable spring pieces are driven by the slider structure to electrically contact with the two static conductive pieces 21, and due to the structural design of the movable spring pieces and the conductive bracket, current can generate an electric repulsive force for pushing the movable spring pieces when passing through the conductive bracket, so as to increase the contact force between the movable contact and the static contact.

As a preferred embodiment, the positioning structure includes two positioning hooks 5 disposed on two sides of the front end of the slider structure 4, and two hook grooves 51 disposed on the two positioning hooks 5, and the other ends of the two movable springs are respectively positioned and inserted in the two hook grooves 51, and correspondingly, a bayonet matched with the positioning hooks 5 is disposed on the other end of the movable spring, the positioning structure is designed to realize linkage matching between the slider structure 4 and the two movable springs, so as to prevent the other ends of the two movable springs from being separated from the positioning hooks of the slider structure 4, so that the mounting stability is good, the two movable springs are driven by the slider structure 4 to synchronously elastically deflect toward one side close to the two static conductive sheets 21, and when the movable spring is separated from the static conductive sheets 21, the slider structure 4 can realize reset movement under the elastic force of the two movable springs, the assembly between the slider structure and the two movable springs is simple and convenient, and the assembly between the slider structure and the two movable springs is applicable to automated assembly production, and the mounting efficiency is improved.

As shown in fig. 5, the conductive bracket 32 includes two vertical plate portions 321 respectively connecting the two movable springs, a middle spacing groove formed between the two vertical plate portions 321 and extending to the top of the conductive bracket 32, and a connecting portion 322 connected to the bottom of the two vertical plate portions 321, in order to reliably and fixedly mount the conductive bracket 32 on the base 1, two mounting grooves are provided on the two mounting bosses 13, two mounting pins 323 respectively fixedly inserted into the two mounting grooves are bent and formed at the bottom edge of the connecting portion 322, and the two mounting pins 323 are in an L-shaped structure. It should be noted that, after the movable spring piece 311 is assembled, a gap is left between the movable spring piece 311 and the conductive bracket, and only the upper end portion of the movable spring piece is fixedly contacted with the vertical plate portion 321, so that a U-shaped current path passing through the two vertical plate portions 321 and the connecting portion 322 is formed between the two movable spring pieces 311, that is, the current is transmitted to the conductive bracket 32 through one movable spring piece and then transmitted to the other movable spring piece along the U-shaped current path on the conductive bracket 32. The design has the advantages that a conductive loop is formed by connecting the two static conductive sheets, the two movable contact springs and the conductive support, when the two movable contact springs 311 are in contact with the two static conductive sheets 21 and are electrified, current is input from one static conductive sheet 21, then the current is output from the other static conductive sheet 21 after being transmitted between the two movable contact springs and the conductive support 32, and the current is transmitted between the two movable contact springs and the conductive support along the U-shaped current path, so that the sectional area of the current passing through the movable contact springs and the conductive support is increased, the temperature rise of the contact is reduced, the passing current is large, the load of high voltage and large current can be disconnected by a relay product, and the service performance of the product is improved.

As shown in fig. 1-2, the base 1 is provided with a mounting partition 14 blocking the other end of the mounting chute 11, the magnetic circuit driving assembly 8 and the slider structure 4 are respectively disposed on two sides of the mounting partition 14, a yoke is mounted in a slot formed on one side of the mounting partition 14, the driving coil 81 and the driving portion 71 of the armature component 7 are separated from each other by the mounting partition 14, the base 1 is sleeved with a housing 9, an insulating baffle 91 abutting between the two mounting bosses 13 for separating the armature component 7 from the conductive bracket 32 is disposed in the housing 9, in this structure, the armature component 7 and the conductive bracket 32 are separated from each other by the insulating baffle 91 on the housing 9, an electrical gap between the armature component 7 and the conductive bracket 32 is enlarged by the insulating baffle 91, an arc-jumping and creepage phenomena are prevented, and overvoltage performance of the product is improved.

It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the invention.

Claims

1. The utility model provides a resistant heavy load's electromagnetic relay, includes base (1), and set up in magnetic circuit drive assembly (8), movable contact structure (3), static contact structure (2) of base (1), and the activity sets up transmission assembly between magnetic circuit drive assembly (8) and movable contact structure (3), its characterized in that: the transmission assembly comprises an armature component (7) which can be arranged on the magnetic circuit driving assembly (8) in a swinging mode and a slider structure (4) which can be arranged on the base (1) in a reciprocating mode, the moving contact piece structure (3) comprises a spring assembly (31) which is in linkage fit with the slider structure (4), the spring assembly (31) is arranged opposite to the static contact piece structure (2), the armature component (7) is provided with a driving part (71) which extends towards one side of the slider structure (4) in an inclined mode for a set length, and the slider structure (4) is connected with the driving part (71) through a limiting structure; the armature component (7) is attracted and swung by the magnetic circuit driving component (8) to push the sliding block structure (4) to move, so that the sliding block structure (4) drives the spring component to be in contact with the static contact piece structure.

2. A large load resistant electromagnetic relay according to claim 1, characterized in that: the base (1) is provided with an installation sliding groove (11) in an extending mode along the length direction of the base, the sliding block structure (4) is movably contained in the installation sliding groove (11), and a guide structure for guiding the sliding block structure (4) to move along the length direction of the base is arranged between the installation sliding groove (11) and the sliding block structure (4).

3. A heavy load tolerant electromagnetic relay according to claim 2, wherein: the guide structure comprises a guide groove (12) extending in the same direction with the installation sliding groove (11) and arranged in the installation sliding groove (11), and a guide projection (41) arranged at the bottom of the sliding block structure (4) and connected to the guide groove (12) in a sliding mode, wherein the guide groove (12) extends out of one end of the installation sliding groove (11) and extends to the static contact piece structure (2).

4. A heavy load tolerant electromagnetic relay according to claim 3, wherein: the limiting structure comprises a limiting slot arranged on the sliding block structure, and one end of the driving part is inserted into the limiting slot.

5. A large load tolerant electromagnetic relay according to any one of claims 2 to 4, wherein: the magnetic circuit driving assembly (8) comprises a driving coil (81) and a yoke, the armature component (7) is connected to the upper end of the yoke (82) in an L-shaped swing mode, and a spring piece structure is arranged between the armature component and the yoke (82); the driving part (71) is a sloping plate structure formed by reducing the width of one end of the armature component (7) and then extending downwards.

6. A heavy load tolerant electromagnetic relay as claimed in claim 5, wherein: the base (1) comprises two mounting bosses (13) which are formed on two sides of the mounting chute (11), the movable contact spring structure (3) comprises a conductive support (32) erected on the two mounting bosses (13), the spring assembly (31) comprises two movable spring pieces (311) which are symmetrically arranged on the conductive support (32), one ends of the movable spring pieces (311) are respectively fixed on the conductive support (32), and the other ends of the movable spring pieces extend to the lower portion of the conductive support (32) and are in linkage arrangement with the sliding block structure (4) through a positioning structure.

7. The heavy load tolerant electromagnetic relay of claim 6, wherein: the positioning structure comprises two positioning hooks (5) arranged on two sides of the front end of the sliding block structure (4) and two hook grooves (51) arranged on the two positioning hooks (5), and the other ends of the two movable springs are respectively positioned and inserted in the two hook grooves (51).

8. A heavy load tolerant electromagnetic relay according to claim 7, wherein: the conductive support (32) comprises two vertical plate parts (321) which are respectively connected with two movable spring pieces, a middle spacing groove which is formed between the two vertical plate parts (321) and extends to the top of the conductive support (32), and a connecting part (322) which is connected to the bottoms of the two vertical plate parts (321), wherein two mounting grooves are formed in the mounting boss (13), two mounting clamping feet (323) which are respectively inserted into the two mounting grooves are bent and formed at the bottom edge of the connecting part (322), and a U-shaped current path which passes through the two vertical plate parts (321) and the connecting part (322) is formed between the movable spring pieces.

9. A heavy load tolerant electromagnetic relay as claimed in claim 8, wherein: the static contact piece structure (2) comprises two static conductive pieces (21) which are arranged on the base (1) at intervals corresponding to the two movable spring pieces, two pairs of movable contacts and static contacts are arranged on the two static conductive pieces (21) and the two movable spring pieces in an opposite mode respectively, and guide pin ends (22) penetrating through the bottom of the base are formed at the bottoms of the two static conductive pieces (21) in a bending mode.

10. A large load resistant electromagnetic relay according to any one of claims 1 to 9, characterized in that: the base (1) is provided with an installation partition plate (14) blocking the other end of the installation chute (11), and the magnetic circuit driving assembly (8) and the slider structure (4) are respectively arranged on two sides of the installation partition plate (14); the magnetic circuit breaker is characterized by further comprising a cover shell (9) sleeved on the base (1), wherein an insulating baffle (91) which is inserted between the two mounting bosses (13) and used for separating the armature component (7) from the conductive support (32) is arranged in the cover shell (9).