Electromagnetic tripping device of circuit breaker

Abstract

The utility model discloses an electromagnetic tripping device of a circuit breaker, and relates to the technical field of electromagnetic tripping devices. The coil sliding frame comprises a coil sliding frame, an ejector rod, a spring, a static iron core and a movable iron core, the ejector rod is sleeved with the spring, the ejector rod is arranged on the inner wall of one end of the coil sliding frame, the static iron core is arranged at one end of the coil sliding frame, the movable iron core is arranged at the other end of the coil sliding frame, and an end cover is detachably installed at one end of the coil sliding frame. An assembling component is arranged between the end cover and the coil carriage; a dismounting component is arranged among the end cover, the ejector rod and the static iron core; through the arranged assembling assembly, the end cover can be limited and fixed through insertion of the sleeving ring and the sleeving groove in the assembling assembly and insertion of the locking screw and the limiting hole, the end cover is fixed to the end of the coil sliding frame, after assembling, the ejector rod is located in the coil sliding frame, and the static iron core is located outside the coil sliding frame; therefore, quick assembly of the ejector rod and the static iron core is conveniently realized, and the convenience of assembly operation is effectively improved.

Description

An electromagnetic tripping device for a circuit breaker Technical Field

[0001] This utility model relates to the technical field of electromagnetic tripping devices, specifically to an electromagnetic tripping device for a circuit breaker. Background Technology

[0002] The electromagnetic tripping device for a miniature circuit breaker, disclosed in CN213816037U, includes a moving iron core, a push rod, a spring, a coil carriage, and a stationary iron core. The moving iron core is embedded in the left side of the coil carriage, which is made of reinforced flame-retardant polyamide PA66. The left side of the coil carriage has a mounting hole for the moving iron core. The stationary iron core is embedded in the right side of the coil carriage, and both the moving and stationary iron cores are made of electrical pure iron DT3. A push rod, made of rivet aluminum wire LF2, is installed inside the coil carriage on the left side of the stationary iron core. A spring, made of stainless steel wire, is fitted onto the push rod. The device has a simple structure, is suitable for infrequent opening and closing functions, is small in size, easy to install and maintain, and has reliable performance. It is suitable for internal electromagnetic tripping in miniature circuit breakers and exhibits high stability and practicality, making it worthy of promotion.

[0003] However, the electromagnetic tripping device in this patent still has some drawbacks:

[0004] The electromagnetic tripping device in this patent has consumable parts, including the moving iron core, the stationary iron core, and the push rod (spring), which need to be replaced regularly after long-term use. However, the coil carriage in this patent does not have convenient assembly parts, which makes the assembly of the moving iron core, the stationary iron core, and the push rod (spring) inconvenient and difficult to replace. Summary of the Invention

[0005] In order to solve the above problems, the purpose of this utility model is to provide an electromagnetic tripping device for a circuit breaker.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: an electromagnetic tripping device for a circuit breaker, comprising a coil slide, a push rod, a spring, a stationary iron core, and a moving iron core, wherein the spring is sleeved on the outside of the push rod, the push rod is disposed on the inner wall of one end of the coil slide, the stationary iron core is disposed at one end of the coil slide, and the moving iron core is disposed at the other end of the coil slide. An end cover is detachably installed at one end of the coil slide, an assembly assembly is provided between the end cover and the coil slide, and a disassembly assembly is provided between the end cover and the push rod and the stationary iron core.

[0007] The assembly component includes a sleeve ring, one end of which is fixedly connected to one side of the end cap, and one end of the coil carriage is provided with a sleeve groove, wherein the sleeve ring and the sleeve groove are movably inserted into each other.

[0008] Several L-shaped lugs are fixedly installed on the outer wall of the coil carriage. Locking screws are threadedly installed on the L-shaped lugs. Several limiting holes are provided on the sleeve ring. One end of the locking screw is in movable contact with the inner wall of the limiting hole.

[0009] Preferably, an outer rubber ring is fixedly provided on the outer wall of the sleeve ring, and an inner rubber ring is fixedly provided on the inner wall of the sleeve ring, wherein the outer rubber ring and the inner rubber ring are in movable contact with the inner wall of the sleeve groove.

[0010] Preferably, a hexagonal seat is fixedly provided at the other end of the locking screw.

[0011] Preferably, the upper surface of the hexagonal base is provided with a hexagonal groove.

[0012] Preferably, the disassembly and assembly assembly includes elastic buckles and positioning rods. Several elastic buckles are provided, and the elastic buckles are fixedly arranged in a ring on one side of the end cap. The fixed end of the top rod is movably fastened between the elastic buckles.

[0013] Several positioning rods are provided, and several positioning rods are located on the other side of the end cover. The outer wall of the positioning rod is in movable contact with the inner wall of the stationary iron core. One end of the positioning rod is fixedly provided with a threaded rod. Several threaded holes are provided on the other side of the end cover. The threaded rod and the inner wall of the threaded holes are rotatably connected by threads. The other end of the positioning rod is fixedly provided with a limit plate.

[0014] Preferably, a rubber pad is fixedly provided on one side of the limiting plate, and one side of the rubber pad is in movable contact with one end of the stationary iron core.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0016] 1. In this utility model, the end cover can be fixed by the assembly components, which are connected by the sleeve ring and the sleeve groove, and the locking screw and the limiting hole. The end cover is fixed to the end of the coil carriage. After assembly, the top rod is located inside the coil carriage and the stationary iron core is located outside the coil carriage. This facilitates the quick assembly of the top rod and the stationary iron core, thereby effectively improving the convenience of the assembly operation.

[0017] 2. In this utility model, the set disassembly and assembly components limit and fix the fixed end of the top rod by the elastic buckle in the disassembly and assembly components, and the positioning rod and the limiting plate can fix the stationary iron core on the outside of the end cover. The disassembly and assembly process is quick and convenient, improving the convenience of replacing the top rod and the stationary iron core. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 is a schematic diagram of the overall structure of the electromagnetic tripping device of a circuit breaker according to this utility model.

[0020] Figure 2 is a schematic diagram of the separation structure of the top rod and stationary iron core from the coil carriage of this utility model.

[0021] Figure 3 is a schematic diagram of the connection structure between the top rod and the end cap of this utility model.

[0022] Figure 4 is a structural schematic diagram of the L-shaped lug and locking screw of this utility model.

[0023] Figure 5 is a schematic diagram of the separation structure of the static iron core and the end cap of this utility model.

[0024] In the diagram: 1. Coil carriage; 2. Top rod; 3. Spring; 4. Stationary iron core; 5. Moving iron core; 11. End cap; 6. Assembly assembly; 61. Sleeve ring; 62. Sleeve groove; 63. Outer rubber ring; 64. Inner rubber ring; 65. L-shaped lug; 66. Locking screw; 67. Limiting hole; 68. Hexagonal seat; 69. Hexagonal groove; 7. Disassembly assembly; 71. Elastic buckle; 72. Positioning rod; 73. Threaded rod; 74. Threaded hole; 75. Limiting plate; 76. Rubber pad. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] Example: As shown in Figures 1-5, this utility model provides an electromagnetic tripping device for a circuit breaker, including a coil slide 1, a push rod 2, a spring 3, a stationary iron core 4, and a moving iron core 5. The spring 3 is sleeved on the outside of the push rod 2, which is located on the inner wall of one end of the coil slide 1. The stationary iron core 4 is located at one end of the coil slide 1, and the moving iron core 5 is located at the other end of the coil slide 1. When the current is large enough, the magnetic force generated inside the coil slide 1 forms the pushing action of the push rod 2, which then resets. The piston of the push rod 2 moves. This push-pull structure, combined with the spring 3, enables rapid switching. Under stable current conditions, the number of magnetic coils is changed by pushing and pulling, thus changing the magnetic strength. The piston end of the push rod 2 drives the armature of the moving iron core 5. The use of striking an external traction rod to activate an electromagnetic tripping mechanism to cut off the circuit is a prior art disclosed in the prior art document and will not be elaborated here. One end of the coil carriage 1 is detachably fitted with an end cover 11. An assembly assembly 6 is provided between the end cover 11 and the coil carriage 1. A disassembly assembly 7 is provided between the end cover 11 and the top rod 2 and the stationary iron core 4. By setting the assembly assembly 6 and the disassembly assembly 7, the assembly assembly 6 can facilitate the connection and separation of the end cover 11, the top rod 2, the spring 3 and the stationary iron core 4 from the coil carriage 1, thereby facilitating the assembly of the top rod 2, the spring 3, the stationary iron core 4 and the moving iron core 5. The disassembly assembly 7 can facilitate the installation and disassembly of the top rod 2 and the stationary iron core 4, thereby facilitating the replacement of the top rod 2, the spring 3 and the stationary iron core 4.

[0027] Assembly component 6 includes a sleeve ring 61, one end of which is fixedly connected to one side of end cap 11. One end of coil carriage 1 is provided with a sleeve groove 62. The sleeve ring 61 and the sleeve groove 62 are movably inserted into each other. By setting the sleeve ring 61 and the sleeve groove 62, when the sleeve ring 61 is horizontally inserted into the inside of the sleeve groove 62, the end cap 11 can be connected to the end of the coil carriage 1. An outer rubber ring 63 is fixedly provided on the outer wall of the sleeve ring 61, and an inner rubber ring 64 is fixedly provided on the inner wall of the sleeve ring 61. The outer rubber ring 63 and the inner rubber ring 64 are in movable contact with the inner wall of the sleeve groove 62. By setting the outer rubber ring 63 and the inner rubber ring 64, the stability of the sleeve ring 61 after being inserted into the sleeve groove 62 can be improved.

[0028] Two L-shaped lugs 65 are fixedly installed on the outer wall of the coil carriage 1. A locking screw 66 is threaded onto each L-shaped lug 65. Two limiting holes 67 are provided on the sleeve ring 61. One end of the locking screw 66 is in movable contact with the inner wall of the limiting hole 67. By configuring the locking screw 66 and the limiting hole 67, when the locking screw 66 is rotated on the L-shaped lug 65, the end of the locking screw 66 can enter or disengage from the limiting hole 67. After entering the interior, the end cap 11 can be limited by the sleeve ring 61, so that the end cap 11 is fixed to the end of the coil slide 1. The other end of the locking screw 66 is fixedly provided with a hexagonal seat 68. The upper surface of the hexagonal seat 68 is provided with a hexagonal groove 69. By providing the hexagonal seat 68 and the hexagonal groove 69, the locking screw 66 can be easily rotated through the hexagonal seat 68. When the hexagonal wrench is inserted into the interior of the hexagonal groove 69, the locking screw 66 can be rotated through the hexagonal wrench, saving manpower.

[0029] The disassembly and assembly assembly 7 includes four elastic clips 71 and two positioning rods 72. The four elastic clips 71 are fixedly arranged in a ring on one side of the end cover 11. The fixed end of the top rod 2 is movably fastened between the four elastic clips 71. By setting the four elastic clips 71, the fixed end of the top rod 2 can be fixed between the four elastic clips 71. When the end cover 11 is separated from the coil slide 1, by pulling the top rod 2 away from the end cover 11, the fixed end of the top rod 2 can cause the elastic clips 71 to deform outward, and the fixed end of the top rod 2 can disengage from the elastic clips 71, thereby realizing the disassembly of the top rod 2.

[0030] A positioning rod 72 is located on the other side of the end cover 11. The outer wall of the positioning rod 72 is in movable contact with the inner wall of the stationary iron core 4. A threaded rod 73 is fixedly provided at one end of the positioning rod 72. Two threaded holes 74 are provided on the other side of the end cover 11. The threaded rod 73 and the inner wall of the threaded holes 74 are threadedly rotatably connected. A limit plate 75 is fixedly provided at the other end of the positioning rod 72. A rubber pad 76 is fixedly provided on one side of the limit plate 75. One side of the rubber pad 76 is in movable contact with one end of the stationary iron core 4. By setting the positioning rod 72 and the threaded rod 73... The system includes a threaded hole 74, a limiting plate 75, and a rubber pad 76. When the threaded rod 73 corresponds to the threaded hole 74, the limiting plate 75 can be rotated. The limiting plate 75 causes the threaded rod 73 to rotate through the positioning rod 72. The threaded rod 73 is threaded into the threaded hole 74, and one side of the rubber pad 76 is pressed against the end of the stationary iron core 4. The limiting plate 75 and the positioning rod 72 can limit the stationary iron core 4, thereby fixing the stationary iron core 4 to the outside of the end cover 11. The limit of the stationary iron core 4 can be released by reversing the operation, so as to facilitate the disassembly of the stationary iron core 4.

[0031] Working principle: When it is necessary to assemble the top rod 2 and the stationary iron core 4, the operator first aligns the sleeve ring 61 with the sleeve groove 62 horizontally, and then pushes the end cover 11 to move horizontally toward one end of the coil slide 1. At this time, the sleeve ring 61, the outer rubber ring 63 and the inner rubber ring 64 are horizontally inserted into the sleeve groove 62.

[0032] Subsequently, the operators rotated the two hexagonal seats 68 respectively, so that the ends of the two locking screws 66 were threaded into the corresponding limiting holes 67. The locking screws 66 limited the sleeve ring 61 through the limiting holes 67, so that the end cover 11 was fixed to the end of the coil slide 1. At this time, the push rod 2 and the spring 3 were assembled inside the coil slide 1, and the stationary iron core 4 was assembled outside the coil slide 1, thus facilitating the quick assembly of the push rod 2 and the stationary iron core 4, thereby effectively improving the convenience of the assembly operation.

[0033] When it is necessary to replace the stationary iron core 4, the push rod 2, and the spring 3, follow the above steps to separate the end cover 11 from the coil slide 1, then pull the push rod 2 away from the end cover 11. The fixed end of the push rod 2 causes the four elastic buckles 71 to deform outward, and the fixed end of the push rod 2 disengages from the four elastic buckles 71, thus realizing the disassembly of the push rod 2.

[0034] Simultaneously, manually rotate the two limiting plates 75. The two limiting plates 75 cause the two threaded rods 73 to rotate through the two positioning rods 72 until the two threaded rods 73 are completely disengaged from the inner walls of the two threaded holes 74. Then, horizontally pull out the two positioning rods 72. The two positioning rods 72 and the two limiting plates 75 are disengaged from the stationary iron core 4, and the stationary iron core 4 can be removed. Then, by reversing the above steps, the replaced top rod 2 and stationary iron core 4 can be fixed on both sides of the end cover 11, thereby facilitating the replacement of the top rod 2 and stationary iron core 4 and effectively improving the convenience of the replacement operation of the top rod 2 and stationary iron core 4.

[0035] All standard parts used in this invention can be purchased from the market, and irregular parts can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art, and the circuit connection adopts conventional connection methods in the prior art, which will not be described in detail here.

[0036] Obviously, those skilled in the art can make various modifications and variations to this utility model without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this utility model and their equivalents, this utility model also intends to include these modifications and variations.

Claims

1. An electromagnetic tripping device for a circuit breaker, comprising a coil carriage (1), a push rod (2), a spring (3), a stationary iron core (4), and a moving iron core (5), wherein the spring (3) is sleeved on the outside of the push rod (2), the push rod (2) is disposed on the inner wall of one end of the coil carriage (1), the stationary iron core (4) is disposed at one end of the coil carriage (1), and the moving iron core (5) is disposed at the other end of the coil carriage (1), characterized in that: One end of the coil slide (1) is detachably fitted with an end cap (11). An assembly assembly (6) is provided between the end cap (11) and the coil slide (1). A disassembly assembly (7) is provided between the end cap (11), the top rod (2), and the stationary iron core (4). The assembly assembly (6) includes a sleeve ring (61). One end of the sleeve ring (61) is fixedly connected to one side of the end cap (11). One end of the coil slide (1) is provided with a sleeve groove (62). The sleeve ring (61) and the sleeve groove (62) are movably inserted into each other. Several L-shaped lugs (65) are fixedly provided on the outer wall of the coil slide (1). A locking screw (66) is threadedly mounted on the L-shaped lugs (65). Several limiting holes (67) are provided on the sleeve ring (61). One end of the locking screw (66) is in movable contact with the inner wall of the limiting hole (67).

2. The electromagnetic tripping device for a circuit breaker as described in claim 1, characterized in that, An outer rubber ring (63) is fixedly provided on the outer wall of the sleeve ring (61), and an inner rubber ring (64) is fixedly provided on the inner wall of the sleeve ring (61). The outer rubber ring (63) and the inner rubber ring (64) are in movable contact with the inner wall of the sleeve groove (62).

3. The electromagnetic tripping device for a circuit breaker as described in claim 1, characterized in that, The other end of the locking screw (66) is fixedly provided with a hexagonal seat (68).

4. The electromagnetic tripping device for a circuit breaker as described in claim 3, characterized in that, The upper surface of the hexagonal base (68) is provided with a hexagonal groove (69).

5. The electromagnetic tripping device for a circuit breaker as described in claim 1, characterized in that, The disassembly and assembly assembly (7) includes elastic buckles (71) and positioning rods (72). Several elastic buckles (71) are provided, and several elastic buckles (71) are fixedly arranged in a ring on one side of the end cover (11). The fixed end of the top rod (2) is movably fastened between several elastic buckles (71). Several positioning rods (72) are provided, and several positioning rods (72) are arranged on the other side of the end cover (11). The outer wall of the positioning rod (72) is in movable contact with the inner wall of the stationary iron core (4). One end of the positioning rod (72) is fixedly provided with a threaded rod (73). Several threaded holes (74) are provided on the other side of the end cover (11). The inner wall of the threaded rod (73) and the threaded hole (74) are threadedly rotated. The other end of the positioning rod (72) is fixedly provided with a limit plate (75).

6. The electromagnetic tripping device for a circuit breaker as described in claim 5, characterized in that, A rubber pad (76) is fixedly provided on one side of the limiting plate (75), and one side of the rubber pad (76) is in contact with one end of the stationary iron core (4).

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