Relay pushing assembly with short-circuit current resisting structure

Abstract

The utility model discloses a relay pushing assembly with an anti-short-circuit current structure, which comprises a movable contact piece, a fixed support and an anti-short-circuit assembly, the movable contact piece is arranged in the fixed support in a penetrating manner, the anti-short-circuit assembly comprises a first magnetizer and a second magnetizer, the first magnetizer is arranged at the bottom of the movable contact piece, and the second magnetizer is arranged at the bottom of the fixed support. The fixed support is provided with two fixed lug plates, the second magnetizer is fixed between the two fixed lug plates and located at the top of the fixed support, and the second magnetizer and the first magnetizer can form a magnetic conductive loop surrounding the movable contact piece. On the basis of not increasing parts, the second magnetizer is fixed by the two fixing lug plates on the fixing support, the fixing mode is simple and reliable, and the problems that the number of the parts is large, the manufacturing process and the assembling process are complex, and air leakage and foreign matter risks exist can be solved.

Description

Technical Field

[0001] The utility model relates to the technical field of relays, in particular to a relay driving component with a short-circuit current resistance structure. Background Art

[0002] With the rapid development of the new energy electric vehicle industry, the market has put forward higher requirements on the ability of DC relays to cope with abnormal working conditions, especially the ability to cope with short-circuit currents. Therefore, the design and assembly of the anti-short-circuit structure in DC relays are crucial.

[0003] The short-circuit resistance of DC relays is mainly improved by setting upper and lower armatures. DC relays will generate electrostatic repulsion under high current conditions. The upper and lower armatures form different magnetic poles when the high current is passed, which creates an attractive force. This provides a supporting force for the entire moving assembly that is opposite to the electrostatic repulsion, thereby preventing the moving and static contacts from being repelled and causing sticking, explosion, and other conditions.

[0004] Currently, there are many ways to secure the upper and lower armatures in relays, but most of them are secured separately. Specifically, the lower armature is typically secured with a movable contact and spring, while the upper armature is typically secured in one of two ways: 1) brazing the upper armature to the ceramic cover. This method requires a brazing process, is difficult to operate, and carries a high risk of falling off. 2) securing the upper armature to a metal or non-metallic armature frame, which is then secured to the pole piece. This method presents challenges such as complex assembly, a large number of parts, significant space requirements, and the risk of air leakage and foreign matter. Therefore, it is necessary to improve existing technologies to overcome these shortcomings. Utility Model Content

[0005] In order to solve the above technical problems, the utility model provides a relay driving assembly with a short-circuit current resistant structure, which avoids problems such as a large number of parts, complex manufacturing, and the risk of air leakage and foreign matter by fixing the second magnetic conductor on a fixed bracket.

[0006] The technical solution adopted by the present invention to solve its technical problems is: a relay driving assembly with an anti-short-circuit current structure, comprising: a moving contact piece, a fixed bracket and an anti-short-circuit assembly, the moving contact piece is inserted into the fixed bracket, the anti-short-circuit assembly comprises a first magnetic conductor and a second magnetic conductor, the first magnetic conductor is installed at the bottom of the moving contact piece, the fixed bracket is provided with two fixed ear plates, the second magnetic conductor is fixed between the two fixed ear plates and is located at the top of the fixed bracket, and the second magnetic conductor can form a magnetic circuit surrounding the moving contact piece with the first magnetic conductor.

[0007] As a further improvement of the present invention, the two fixed ear plates have a first form before assembly and a second form after assembly. In the first form, the two fixed ear plates are inclined and distributed in an inverted "eight" shape; in the second form, the two fixed ear plates are fixed to the second magnetic conductor by a riveting process. At this time, the two fixed ear plates are distributed perpendicular to the second magnetic conductor.

[0008] As a further improvement of the present invention, both ends of the second magnetic conductor are provided with bosses, and the two fixing ear plates are provided with fixing holes. In the first form, the two bosses are respectively accommodated in the two fixing holes; in the second form, the two bosses are respectively fixedly inserted in the corresponding two fixing holes and protrude outward from the fixing holes.

[0009] As a further improvement of the present invention, the fixed bracket includes a stop top plate and two fixed side plates, the stop top plate is fixedly connected to the upper ends of the two fixed side plates, the movable contact piece passes across the two fixed side plates, the two fixed ear plates are respectively arranged at the two ends of the stop top plate along the width direction of the movable contact piece, or the two fixed ear plates are respectively arranged at the two ends of the stop top plate along the length direction of the movable contact piece, or the two fixed ear plates are respectively arranged at the top of the two fixed side plates.

[0010] As a further improvement of the present invention, the stop top plate and the two fixed side plates are integrally formed from a metal plate, the stop top plate is formed in the middle section of the metal plate, and the two end sections of the metal plate are bent downward relative to the stop top plate to form the two fixed side plates; the two fixed ear plates are respectively formed at the bending points of the stop top plate and the two fixed side plates, or the two fixed ear plates are formed by integrally stamping the two ends of the stop top plate along the length direction of the moving contact piece.

[0011] As a further improvement of the present invention, a positioning groove is provided at the bottom of the second magnetic conductor, and the stop top plate is clamped in the positioning groove.

[0012] As a further improvement of the present invention, the relay pushing assembly with an anti-short-circuit current structure also includes a fixed base, a push rod and a contact spring. The lower ends of the two fixed side plates are bent toward each other to form a fixed base plate. The fixed base is integrally injection-molded and covers the fixed base plate and the upper end of the push rod; the contact spring is arranged between the first magnetic conductor and the fixed base to apply an upward elastic force to the moving contact piece so that the moving contact piece is pressed upward against the stop top plate.

[0013] As a further improvement of the present invention, a spring positioning groove and a first positioning protrusion located in the middle of the spring positioning groove are provided on the top of the fixed base, the top surface of the fixed base plate is exposed outward from the spring positioning groove, the lower end of the contact spring is placed in the spring positioning groove and abuts against the fixed base plate, and the first positioning protrusion is located inside the contact spring.

[0014] As a further improvement of the present invention, two grooves are provided on the top of the movable contact piece along its width direction, and a platform for abutting against the bottom surface of the stop top plate is formed between the two grooves.

[0015] As a further improvement of the present invention, the first magnetic conductor is provided with a horizontally distributed supporting base plate and two magnetic side arms integrally connected to the supporting base plate and distributed vertically. The supporting base plate is abutted against the bottom of the moving contact piece, and the front and rear sides of the moving contact piece are provided with limiting grooves. The two magnetic side arms are respectively arranged in the corresponding two limiting grooves and are opposite to the second magnetic conductor up and down.

[0016] The beneficial effects of the present invention are as follows: the present invention provides a relay driving assembly with a short-circuit current resistant structure. By arranging two fixing ear plates on the fixing bracket, the second magnetic conductor is fixed by utilizing the two fixing ear plates on the fixing bracket without adding any parts. This fixing method is not only simple and reliable, but also can avoid problems such as a large number of parts, complicated manufacturing and assembly processes, and the risks of air leakage and foreign matter. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a perspective view of the first embodiment of the relay driving assembly with a short-circuit current resistance structure of the utility model before the fixed ear plate and the second magnetic conductor are fixedly assembled;

[0018] Figure 2 This is a cross-sectional view of a first embodiment of a relay driving assembly with a short-circuit current resistance structure according to the present invention;

[0019] Figure 3 This is an exploded view of the first embodiment of the relay driving assembly with a short-circuit current resistance structure of the utility model;

[0020] Figure 4 This is a three-dimensional diagram of the assembly of the movable contact piece and the first magnetic conductor according to the first embodiment of the present invention;

[0021] Figure 5 This is a three-dimensional diagram of the assembly of the fixing bracket and the fixing base of the first embodiment of the present utility model;

[0022] Figure 6 This is a three-dimensional diagram of the assembly of the fixing bracket and the second magnetic conductor according to the first embodiment of the present invention;

[0023] Figure 7 This is a perspective view of the first embodiment of the relay driving assembly with a short-circuit current resistance structure according to the present invention after the fixed ear plate and the second magnetic conductor are fixedly assembled;

[0024] Figure 8 This is a perspective view of the second embodiment of the relay driving assembly with a short-circuit current resistance structure of the present invention before the fixed ear plate and the second magnetic conductor are fixedly assembled;

[0025] Figure 9 This is a perspective view of the second embodiment of the relay driving assembly with a short-circuit current resistance structure of the present invention after the fixed ear plate and the second magnetic conductor are fixedly assembled;

[0026] Figure 10 This is a three-dimensional diagram of the third embodiment of the relay driving assembly with a short-circuit current resistance structure of the present invention before the fixed ear plate and the second magnetic conductor are fixedly assembled;

[0027] Figure 11 This is an exploded view of the fixing bracket and the second magnetic conductor of the third embodiment of the present invention;

[0028] Figure 12 This is a three-dimensional diagram of the third embodiment of the relay driving assembly with a short-circuit current resistance structure of the present invention after the fixed ear plate and the second magnetic conductor are fixedly assembled.

[0029] The following description is made with reference to the accompanying drawings:

[0030] 1. Moving contact piece; 11. Limiting groove; 12. Groove; 13. Platform; 2. Fixed bracket; 21. Fixed ear plate; 211. Fixed hole; 22. Stop top plate; 23. Fixed side plate; 24. Fixed bottom plate; 3. First magnetic conductor; 31. Load-bearing bottom plate; 311. Second positioning convex bump; 32. Magnetic side arm; 4. Second magnetic conductor; 41. Boss; 42. Positioning groove; 5. Fixed base; 51. Spring positioning groove; 52. First positioning convex bump; 6. Push rod; 7. Contact spring. DETAILED DESCRIPTION

[0031] The preferred embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0032] Example 1

[0033] See Figures 1 to 7 The utility model provides a relay driving component with an anti-short-circuit current structure, comprising a moving contact piece 1, a fixing bracket 2 and an anti-short-circuit component.

[0034] In this embodiment, the fixing bracket 2 is in a square shape, and the movable contact piece 1 is laterally inserted into the fixing bracket 2. The fixing bracket 2 is provided with two fixing lugs 21 arranged along the width direction of the movable contact piece 1, and the two fixing lugs 21 are both located at the top of the fixing bracket 2.

[0035] The anti-short-circuit assembly includes a first magnetic conductor 3 and a second magnetic conductor 4. For example, the first magnetic conductor 3 and the second magnetic conductor 4 can be made of materials such as pure iron. The first magnetic conductor 3 is mounted on the bottom of the movable contact piece 1 and moves up and down synchronously with the movable contact piece 1. The second magnetic conductor 4 is fixed between the two fixed lugs 21 and is located on top of the fixed bracket 2. The second magnetic conductor 4 and the first magnetic conductor 3 can form a magnetic circuit surrounding the movable contact piece 1.

[0036] When the relay is working, driven by its electromagnetic drive mechanism, the push component moves upward so that the two ends of the moving contact piece 1 abut against the bottom of the two static contacts of the relay. When current flows through the moving contact piece 1, a circular magnetic field is generated, which is conducted through the magnetic circuit to form different magnetic poles on the first magnetic conductor 3 and the second magnetic conductor 4. The magnetic attraction force exerted by the second magnetic conductor 4 on the first magnetic conductor 3 acts on the moving contact piece 1, providing the moving contact piece 1 with a supporting force opposite to the electromotive repulsive force, thereby improving the relay's ability to withstand short-circuit current.

[0037] The fixed bracket 2 is an inherent part of the relay push assembly, which plays the role of supporting and limiting the moving contact piece 1. The present application provides two fixed ear plates 21 on the fixed bracket 2. Without adding any parts, the second magnetic conductor 4 is fixed by using the two fixed ear plates 21 on the fixed bracket 2. The fixing structure is simple and reliable, avoiding problems such as a large number of parts, complex manufacturing process and assembly process.

[0038] See Figure 5 and Figure 6 The fixed bracket 2 includes a horizontally distributed stop top plate 22 and two vertically distributed fixed side plates 23. The stop top plate 22 is fixedly connected to the upper ends of the two fixed side plates 23. The moving contact piece 1 passes horizontally between the two fixed side plates 23. The two fixed ear plates 21 are respectively arranged at both ends of the stop top plate 22 along the width direction of the moving contact piece 1.

[0039] In this embodiment, the stop top plate 22 and the two fixed side plates 23 are integrally formed from a metal plate. Specifically, the stop top plate 22 is formed in the middle section of the metal plate, and the two end sections of the metal plate are bent downward relative to the stop top plate 22 to form the two fixed side plates 23.

[0040] In addition, the two fixed ear plates 21 are also integrally formed with the stop top plate 22. Specifically, the two fixed ear plates 21 are integrally stamped along the bends of the stop top plate 22 and the two fixed side plates 23, and both fixed ear plates 21 are bent upward. At the same time, arc-shaped portions are machined at the ends of the two fixed ear plates 21 where they are connected to the stop top plate 22. The arc-shaped portions of the two fixed ear plates 21 protrude relatively outward to facilitate riveting. Both fixed ear plates 21 are provided with fixing holes 211. The second magnetic conductor 4 is in the shape of a rectangular block, and both ends thereof along the width direction of the movable contact piece 1 are provided with bosses 41 that match the fixing holes 211. The two bosses 41 are fixedly inserted into the corresponding two fixing holes 211, thereby achieving reliable fixation of the second magnetic conductor 4.

[0041] It should be noted that the two fixing lugs 21 have a first form before assembly and a second form after assembly. In the first form, that is, before assembling the second magnetizer 4, the two fixing lugs 21 are bent into an inclined state, and the two fixing lugs 21 are inclined in an inverted eight-shaped distribution (such as Figure 5 As shown), the second magnetic conductor 4 is placed between the two fixed ear plates 21, so that the two bosses 41 are partially inserted into the fixing holes 211 of the fixed ear plates 21; and then the two fixed ear plates 21 are bent inwardly into a vertical state (as shown). Figure 7 As shown), the two fixing ear plates 21 are distributed perpendicular to the second magnetic conductor 4, and the two bosses 41 are fixedly inserted into the corresponding two fixing holes 211 and protrude outward from the fixing holes 211. At this time, the two fixing ear plates 21 are in the second form, and can be further fixed on the two bosses 41 by riveting process, thereby achieving reliable fixation of the second magnetic conductor 4, and this assembly method is simple and reliable.

[0042] Since the fixing bracket 2 in the present invention is made of metal, the problem of foreign matter caused by using plastic parts to fix the second magnetic conductor 4 is avoided.

[0043] In other embodiments of the present invention, the stop top plate 22 and the two fixed side plates 23 can also be processed separately. For example, by setting assembly holes on the two fixed side plates 23, the stop top plate 22 is riveted into the assembly holes of the two fixed side plates 23 to achieve fixation. At the same time, a position is reserved at the upper end of the two fixed side plates 23 for processing the fixed ear plates 21. The two fixed ear plates 21 set at the upper ends of the two fixed side plates 23 can also be used to fix the second magnetic conductor 4.

[0044] In this embodiment, the first magnetic conductor 3 is U-shaped, and is provided with a horizontally distributed supporting base plate 31 and two magnetic side arms 32 integrally connected to the supporting base plate 31 and distributed vertically. The supporting base plate 31 is abutted against the bottom of the moving contact piece 1; the front and rear sides of the moving contact piece 1 (i.e., the two sides facing the two fixed side plates 23) are provided with limiting grooves 11, and the two magnetic side arms 32 are respectively arranged in the corresponding two limiting grooves 11 and are opposite to the second magnetic conductor 4 up and down. The first magnetic conductor 3 is positioned on the moving contact piece 1 through the cooperation between the magnetic side arms 32 and the limiting grooves 11.

[0045] Further, see Figures 1 to 3 The relay pushing assembly with anti-short-circuit current structure of the present invention also includes a fixed base 5, a push rod 6 and a contact spring 7. The fixed bracket 2 and the push rod 6 are fixedly connected to the fixed base 5 and are distributed on the upper and lower sides of the fixed base 5. The contact spring 7 is arranged between the first magnetic conductor 3 and the fixed base 5 to exert an upward elastic force on the moving contact piece 1, so that the moving contact piece 1 is pressed upward against the stop top plate 22.

[0046] like Figure 6 As shown, the lower ends of the two fixed side plates 23 are bent toward each other to form a fixed base plate 24. The fixed base 5 in this embodiment is made of an insulating plastic material, which is integrally injection-molded and covers the upper end of the fixed base plate 24 and the push rod 6. In addition, the top of the fixed base 5 is provided with a spring positioning groove 51 and a first positioning protrusion 52 located in the middle of the spring positioning groove 51. The top surface of the fixed base plate 24 is exposed outward from the spring positioning groove 51. The lower end of the contact spring 7 is placed in the spring positioning groove 51 and abuts against the fixed base plate 24. Here, the contact spring 7 is directly abutted against the metal fixed base plate 24, rather than the plastic fixed base 5. This can effectively prevent the contact spring 7 and the fixed base 5 from abrading and producing foreign matter.

[0047] The first positioning bump 52 is located inside the contact spring 7 and is used to position the lower end of the contact spring 7. Meanwhile, a second positioning bump 311 is provided at the bottom of the supporting base plate 31 of the first magnetic conductor 3. The upper end of the contact spring 7 is sleeved outside the second positioning bump 311 to position the upper end of the contact spring 7.

[0048] See Figure 2 and Figure 4 Two grooves 12 are provided on the top of the moving contact piece 1 along its width direction, and a platform 13 is formed between the two grooves 12 for abutting against the bottom surface of the stop top plate 22. Under the elastic force of the contact spring 7, the top surface of the platform 13 abuts against the bottom surface of the stop top plate 22.

[0049] It should be noted that in other embodiments of the present invention, the second magnet 4 can also be set to an inverted U shape. For example, the two bosses of the second magnet 4 are extended downward so that the second magnet 4 as a whole has an inverted U-shaped structure, so as to reduce the magnetic gap between the second magnet 4 and the first magnet 3, thereby increasing the magnetic attraction between the two after magnetization.

[0050] Example 2

[0051] See Figure 8 and Figure 9 The difference between this embodiment and the first embodiment is that the positions of the two fixing ear plates 21 are different.

[0052] Specifically, the two fixed ear plates 21 in this embodiment are respectively arranged at the middle position of the two ends of the stop top plate 22 along the length direction of the movable contact piece 1, and the two fixed ear plates 21 are both integrally stamped from the two ends of the stop top plate 22 along the length direction of the movable contact piece 1. In addition, the two fixed ear plates 21 are also provided with fixing holes 211.

[0053] Correspondingly, bosses 41 matching the fixing holes 211 are provided at both ends of the second magnetic conductor 4 along the length direction of the movable contact piece 1 .

[0054] Similarly, the two fixing ear plates 21 also have a first form before assembly and a second form after assembly. In the first form, the two fixing ear plates 21 are tilted and distributed in an inverted "eight" shape, and the two bosses 41 of the second magnet 4 are respectively accommodated in the two fixing holes 211; in the second form, the two fixing ear plates 21 are bent inward into a vertical state, so that the two bosses 41 of the second magnet 4 are respectively inserted into the corresponding two fixing holes 211 and protrude outward from the fixing holes 211. At this time, the two fixing ear plates 21 are distributed perpendicular to the second magnet 4.

[0055] In this embodiment, two fixing ear plates 21 are provided at both ends of the stop top plate 22 along the length direction of the movable contact piece 1. Without adding any parts, the second magnetic conductor 4 can also be fixed by using the two fixing ear plates 21 on the fixing bracket 2. This fixing method is not only simple and reliable, but also avoids problems such as a large number of parts, complex manufacturing and assembly processes, and the risk of air leakage and foreign matter.

[0056] Example 3

[0057] In this embodiment, the stop top plate 22 and the two fixed side plates 23 are also integrally formed from a metal plate. The stop top plate 22 is formed in the middle section of the metal plate. The two end sections of the metal plate are bent downward relative to the stop top plate 22 to form the two fixed side plates 23. Two fixed ear plates 21 are integrally stamped at the bend between the stop top plate 22 and the two fixed side plates 23.

[0058] See Figures 10 to 12 Unlike the first embodiment, the two fixing lugs 21 are not connected to the stop top plate 22, but are instead integrally connected to the upper ends of the two fixed side plates 23. The two fixing lugs 21 are also provided with fixing holes 211. The second magnetic conductor 4 is rectangular and has bosses 41 at both ends along the width of the movable contact piece 1 that match the fixing holes 211. The two bosses 41 are fixedly inserted into the corresponding fixing holes 211, thereby reliably fixing the second magnetic conductor 4.

[0059] In this embodiment, the two fixing lugs 21 also have a first state before assembly and a second state after assembly. In the first state, that is, before assembling the second magnetic conductor 4, the two fixing lugs 21 are bent into an inclined state, and the two fixing lugs 21 are inclined in an inverted eight-shaped distribution (such as Figure 10 As shown), the second magnetic conductor 4 is placed between the two fixed ear plates 21, so that the two bosses 41 are partially inserted into the fixing holes 211 of the fixed ear plates 21; and then the two fixed ear plates 21 are bent inwardly into a vertical state (as shown). Figure 12 As shown), the two fixing ear plates 21 are distributed perpendicular to the second magnetic conductor 4, and the two bosses 41 are fixedly inserted into the corresponding two fixing holes 211 and protrude outward from the fixing holes 211. At this time, the two fixing ear plates 21 are in the second form and can be further fixed on the two bosses 41 by riveting process, thereby realizing reliable fixation of the second magnetic conductor 4.

[0060] In addition, in this embodiment, a positioning groove 42 matching the stop top plate 22 is provided at the bottom of the second magnetic conductor 4, and the stop top plate 22 is clamped in the positioning groove 42 to facilitate assembly and positioning of the second magnetic conductor 4 to ensure assembly accuracy.

[0061] In this embodiment, fixed ear plates 21 are provided at the upper ends of the two fixed side plates 23. Without adding any parts, the second magnetic conductor 4 can also be fixed by using the two fixed ear plates 21 on the fixed bracket 2. This fixing method is not only simple and reliable, but also avoids problems such as a large number of parts, complex manufacturing and assembly processes, and the risk of air leakage and foreign matter.

[0062] In the above description, many specific details are set forth in order to fully understand the present invention. However, the above description is only a preferred embodiment of the present invention. The present invention can be implemented in many other ways different from those described herein, so the present invention is not limited by the specific implementation disclosed above. At the same time, any person skilled in the art can use the above-disclosed methods and technical contents to make many possible changes and modifications to the technical solution of the present invention without departing from the scope of the technical solution of the present invention, or modify it into an equivalent embodiment of equivalent changes. Any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still falls within the scope of protection of the technical solution of the present invention.

Claims

1. A relay driving assembly with an anti-short-circuit current structure, comprising a moving contact piece (1), a fixed bracket (2) and an anti-short-circuit assembly, wherein the moving contact piece (1) is inserted into the fixed bracket (2), and the anti-short-circuit assembly comprises a first magnetic conductor (3) and a second magnetic conductor (4), wherein the first magnetic conductor (3) is mounted on the bottom of the moving contact piece (1), and is characterized in that: The fixed bracket (2) is provided with two fixed ear plates (21), the second magnetic conductor (4) is fixed between the two fixed ear plates (21) and is located at the top of the fixed bracket (2), and the second magnetic conductor (4) can form a magnetic circuit surrounding the movable contact piece (1) with the first magnetic conductor (3).

2. The relay driving assembly with a short-circuit current resistance structure according to claim 1, characterized in that: The two fixed ear plates (21) have a first form before assembly and a second form after assembly. In the first form, the two fixed ear plates (21) are tilted and distributed in an inverted "eight" shape. In the second form, the two fixed ear plates (21) are fixed to the second magnetic conductor (4) through a riveting process. At this time, the two fixed ear plates (21) are distributed perpendicular to the second magnetic conductor (4).

3. The relay driving assembly with a short-circuit current resistance structure according to claim 2, characterized in that: Both ends of the second magnetic conductor (4) are provided with bosses (41), and the two fixing ear plates (21) are provided with fixing holes (211). In the first form, the two bosses (41) are respectively accommodated in the two fixing holes (211); in the second form, the two bosses (41) are respectively fixedly inserted in the corresponding two fixing holes (211) and protrude outward from the fixing holes (211).

4. The relay driving assembly with a short-circuit current resistance structure according to claim 1, characterized in that: The fixed bracket (2) includes a stop top plate (22) and two fixed side plates (23), the stop top plate (22) is fixedly connected to the upper ends of the two fixed side plates (23), the movable contact piece (1) passes across the two fixed side plates (23), the two fixed ear plates (21) are respectively arranged at the two ends of the stop top plate (22) along the width direction of the movable contact piece (1), or the two fixed ear plates (21) are respectively arranged at the two ends of the stop top plate (22) along the length direction of the movable contact piece (1), or the two fixed ear plates (21) are respectively arranged at the top of the two fixed side plates (23).

5. The relay driving assembly with a short-circuit current resistance structure according to claim 4, characterized in that: The stop top plate (22) and the two fixed side plates (23) are integrally formed from a metal plate, the stop top plate (22) is formed in the middle section of the metal plate, and the two end sections of the metal plate are bent downward relative to the stop top plate (22) to form the two fixed side plates (23); the two fixed ear plates (21) are respectively formed at the bending parts of the stop top plate (22) and the two fixed side plates (23), or the two fixed ear plates (21) are integrally stamped from the two ends of the stop top plate (22) along the length direction of the movable contact piece (1).

6. The relay driving assembly with a short-circuit current resistance structure according to claim 4, characterized in that: A positioning groove (42) is provided at the bottom of the second magnetic conductor (4), and the stop top plate (22) is clamped in the positioning groove (42).

7. The relay driving assembly with a short-circuit current resistance structure according to claim 4, characterized in that: It also includes a fixed base (5), a push rod (6) and a contact spring (7), the lower ends of the two fixed side plates (23) are bent toward each other to form a fixed base plate (24), the fixed base (5) is integrally injection-molded and covers the fixed base plate (24) and the upper end of the push rod (6); the contact spring (7) is arranged between the first magnetic conductor (3) and the fixed base (5) to apply an upward elastic force to the movable contact piece (1), so that the movable contact piece (1) is pressed upward against the stop top plate (22).

8. The relay driving assembly with a short-circuit current resistance structure according to claim 7, characterized in that: The top of the fixed base (5) is provided with a spring positioning groove (51) and a first positioning convex bump (52) located in the middle of the spring positioning groove (51); the top surface of the fixed base plate (24) is exposed outward from the spring positioning groove (51); the lower end of the contact spring (7) is placed in the spring positioning groove (51) and abuts against the fixed base plate (24); and the first positioning convex bump (52) is located in the contact spring (7).

9. The relay driving assembly with a short-circuit current resistance structure according to claim 4, characterized in that: Two grooves (12) are provided on the top of the movable contact piece (1) along its width direction, and a platform (13) for abutting against the bottom surface of the stop top plate (22) is formed between the two grooves (12).

10. The relay driving assembly with a short-circuit current resistance structure according to claim 1, characterized in that: The first magnetic conductor (3) is provided with a horizontally distributed supporting base plate (31) and two magnetic side arms (32) integrally connected to the supporting base plate (31) and distributed vertically. The supporting base plate (31) is abutted against the bottom of the movable contact piece (1). The front and rear sides of the movable contact piece (1) are both provided with limiting grooves (11). The two magnetic side arms (32) are respectively arranged in the corresponding two limiting grooves (11) and are opposite to the second magnetic conductor (4) in the upper and lower directions.

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