Electromagnetic release

Abstract

An electromagnetic release includes a conductive circuit, an iron core mechanism, a first magnetic yoke, and a second magnetic yoke. The conductive circuit is mounted on the first magnetic yoke, and the iron core mechanism passes through the inner side of the conductive circuit. The second magnetic yoke includes a rotating structure rotatably connected to the first magnetic yoke, and a blocking structure cooperating with the iron core mechanism. The second magnetic yoke can rotate around the rotating structure to drive the blocking structure to fix or release the iron core mechanism, thereby dividing the existing integrated magnetic yoke into a detachable first magnetic yoke and a second magnetic yoke. Through the detachable composite magnetic yoke structure, the iron core mechanism can be replaced by removing the second magnetic yoke without having to scrap the entire electromagnetic release. In addition, the second magnetic yoke is rotatably mounted on the first magnetic yoke, and has the characteristics of reliable fixation and easy assembly and disassembly.

Description

Technical Field

[0001] The invention relates to the field of low-voltage electrical appliances, in particular to an electromagnetic release. Background Art

[0002] Electromagnetic trip units are commonly used in switching devices such as low-voltage circuit breakers. They can trip the circuit breaker when the main circuit is overloaded and / or short-circuited. After the circuit breaker trips, it disconnects the main circuit, thereby achieving protection. Because the electromagnetic trip unit needs to be connected to the main circuit of the circuit breaker during operation, it is also the main current-carrying component. However, current electromagnetic trip units are mainly non-detachable integral structures. During the product manufacturing process, if a part fails, such as the reaction spring is incorrectly installed or the iron core is deformed, the electromagnetic trip unit cannot be recycled and repaired, and the entire silver point, double gold, contacts, yoke, conductive circuit, and contact plate will be scrapped, which is very costly. Summary of the Invention

[0003] The purpose of the present invention is to overcome the defects of the prior art and provide an electromagnetic release which is detachable and has replaceable parts.

[0004] To achieve the above objectives, the present invention adopts the following technical solutions:

[0005] An electromagnetic release includes a conductive circuit, an iron core mechanism, a first magnetic yoke, and a second magnetic yoke. The conductive circuit is mounted on the first magnetic yoke, and the iron core mechanism passes through the inner side of the conductive circuit. The second magnetic yoke includes a rotating structure rotatably connected to the first magnetic yoke, and a blocking structure cooperating with the iron core mechanism. The second magnetic yoke can rotate around the rotating structure, driving the blocking structure to fix or release the iron core mechanism.

[0006] Preferably, the second magnetic yoke includes a limiting structure that cooperates with the first magnetic yoke, and when the blocking structure is fixed to the iron core mechanism, the limiting structure and the first magnetic yoke are limited.

[0007] Preferably, the second magnetic yoke is a U-shaped structure, the blocking structure includes two clamps arranged opposite to each other, the two clamps are connected by a second side plate, the rotating structure is arranged on the second side plate, the second side plate can rotate around the rotating structure and drive the two clamps to approach or move away from the iron core mechanism.

[0008] Preferably, the two clamps are also provided with a clearance opening, which can be sleeved on the frame of the iron core mechanism so that the inner sides of the two clamps are respectively in contact with the two step surfaces on the frame of the iron core mechanism, and the two step surfaces of the iron core mechanism are clamped and fixed between the two clamps.

[0009] Preferably, the rotating structure includes a rotating shaft spaced apart from the second side plate, and a support portion connected between the rotating shaft and the second side plate. The length of the rotating shaft is greater than the width of the support portion, and the rotating shaft forms blocking surfaces on both sides of the support portion respectively. After the rotating shaft is inserted into the first magnetic yoke, it can be limited by the blocking surface and rotated in the first magnetic yoke.

[0010] Preferably, the first magnetic yoke is provided with an insertion hole and a limiting hole that are interconnected, the inner diameter of the insertion hole is greater than or equal to the length of the rotating shaft, and the inner diameter of the limiting hole is less than the length of the rotating shaft and greater than the width of the support part; after the rotating shaft passes through the insertion hole, the support part can be inserted into the limiting hole so that the blocking surfaces at both ends of the rotating shaft are respectively in contact with the first side plate.

[0011] Preferably, the first magnetic yoke includes a base plate connected to the conductive circuit and a first side plate arranged on one side of the base plate opposite to the second side plate. The two clamps are respectively provided with a limiting structure protruding inward, and the distance from the limiting structure to the second side plate is greater than the thickness of the first side plate. When the clamp fixes the iron core mechanism, the limiting structure is stuck on the side of the first side plate away from the second side plate.

[0012] Preferably, the first side panel is provided with a first fixing hole, and the second side panel is provided with a second fixing hole corresponding to the first fixing hole. The first fixing hole and the second fixing hole respectively cooperate with the connecting piece, and the connecting piece can pass through the first fixing hole and the second fixing hole and fix the first side panel to the second side panel.

[0013] Preferably, the first magnetic yoke is provided with a thermal bimetallic strip, a contact plate, a contact and a soft connection, the contact is connected to one end of the conductive loop through the soft connection, and the thermal bimetallic strip and the contact plate are located at the other end of the conductive loop and connected to the first magnetic yoke.

[0014] Preferably, the iron core mechanism includes a skeleton and a static iron core, a moving iron core, a reaction spring and a push rod respectively arranged on the inner side of the skeleton, the push rod is located between the static iron core and the moving iron core, the reaction spring is sleeved on the push rod, and the conductive circuit is wound around the skeleton to form a coil.

[0015] The electromagnetic release created by the present invention has a detachable composite magnetic yoke structure, which divides the existing integrated magnetic yoke into a detachable first magnetic yoke and a second magnetic yoke. The iron core mechanism can be replaced by removing the second magnetic yoke without scrapping the entire electromagnetic release. In addition, the second magnetic yoke is rotatably installed on the first magnetic yoke, and has the characteristics of reliable fixation and easy assembly and disassembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the structure of the electromagnetic release created by the present invention;

[0017] Figure 2-7 This is a diagram of the assembly process of the electromagnetic release created by the present invention;

[0018] Figure 8 This is a schematic structural diagram of the second magnetic yoke created by the present invention;

[0019] Figure 9 This is a schematic structural diagram of the first magnetic yoke created by the present invention;

[0020] Figure 10 This is a schematic structural diagram of the iron core mechanism created by the present invention;

[0021] Figure 11 This is a schematic diagram of the cooperation between the second magnetic yoke and the iron core mechanism created by the present invention. DETAILED DESCRIPTION

[0022] The following is combined with Figures 1 to 11 The following examples further illustrate the specific implementation of the electromagnetic release device created by the present invention. The electromagnetic release device created by the present invention is not limited to the description of the following examples.

[0023] like Figure 1-7 As shown, the electromagnetic release created by the present invention includes a conductive circuit 400, an iron core mechanism 300, a first magnetic yoke 100 and a second magnetic yoke 200. The conductive circuit 400 is installed on the first magnetic yoke 100, and the iron core mechanism 300 passes through the inner side of the conductive circuit 400. The second magnetic yoke 200 includes a rotating structure 210 rotatably connected to the first magnetic yoke 100, and a blocking structure cooperating with the iron core mechanism 300. The second magnetic yoke 200 can rotate around the rotating structure 210 to drive the blocking structure to fix or release the iron core mechanism 300.

[0024] The electromagnetic release created by the present invention has a detachable composite magnetic yoke structure, which divides the existing integrated magnetic yoke into a detachable first magnetic yoke 100 and a second magnetic yoke 200. By removing the second magnetic yoke 200, the core mechanism 300 can be replaced without scrapping the entire electromagnetic release. In addition, the second magnetic yoke 200 is rotatably mounted on the first magnetic yoke 100, and has the characteristics of reliable fixation and easy assembly and disassembly.

[0025] Furthermore, the second magnetic yoke 200 also includes a limiting structure 230 that cooperates with the first magnetic yoke 100. The second magnetic yoke 200 can simultaneously drive the limiting structure 230 and the blocking structure to rotate around the rotating structure 210. When the blocking structure is fixed to the iron core mechanism 300, the limiting structure 230 is limited by the first magnetic yoke 100; when the blocking structure releases the iron core mechanism 300, the limiting structure 230 can be separated from the first magnetic yoke 100.

[0026] By providing a limiting structure 230 on the second magnetic yoke 200, the second magnetic yoke 200 is reliably limited in position to the fixed core mechanism 300, preventing the second magnetic yoke 200 from freely rotating and releasing the core mechanism 300. This not only enables the core mechanism 300, the conductive circuit 400, the first magnetic yoke 100, and the second magnetic yoke 200 to be assembled as a whole and then installed together in a switching device such as a circuit breaker, but also ensures that the second magnetic yoke 200 is more reliably connected between the first magnetic yoke 100 and the core mechanism 300. It is understood that the limiting structure 230 can be omitted, and the second magnetic yoke 200 can be limited by other components such as the circuit breaker housing, and all of these fall within the scope of protection of the present invention.

[0027] like Figure 8 As shown, the second magnetic yoke 200 of this embodiment is a U-shaped structure, and the blocking structure includes two clamping plates 221 arranged opposite to each other. The two clamping plates 221 are connected by a second side plate 222. The second side plate 222 is arranged on one side of the conductive loop 400. The rotating structure 210 is arranged at the bottom of the second side plate 222. The two clamping plates 221 are respectively straight plate structures. The bottoms of the two clamping plates 221 are respectively provided with arc-shaped clearance openings 223. The second side plate 222 can rotate around the rotating structure 210 and drive the two clamping plates 221 to approach or move away from the core mechanism 300. When approaching the core mechanism 300, the clearance openings 223 on the clamping plates 221 can be respectively sleeved on the skeleton 310 of the core mechanism 300 from above, so that the inner sides of the two clamping plates 221 are respectively in contact with the two step surfaces on the skeleton 310 of the core mechanism 300, and the two step surfaces of the core mechanism 300 are clamped and fixed between the two clamping plates 221. As shown Figure 10-11 The two step surfaces shown are a left step surface 311 and a right step surface 312 , and the left step surface 311 and the right step surface 312 are respectively provided at two ends of the frame 310 .

[0028] The blocking structure of this embodiment can reliably fix the two ends of the core mechanism 300 by means of two oppositely arranged clamping plates 221. Of course, the blocking structure can also be provided with only one clamping plate 221, and the other end of the core mechanism 300 can be limited by other components, such as by the first magnetic yoke 100 and the clamping plate 221 respectively limiting the two ends of the core mechanism 300, and all of these fall within the scope of protection created by the present invention. It is understood that the blocking structure can limit the core mechanism 300 in a variety of ways, and can also press the core mechanism 300 against the conductive loop 400, or provide a groove on the core mechanism 300 into which the blocking structure can be inserted.

[0029] like Figure 8-9As shown, the rotating structure 210 of this embodiment is a T-shaped structure. The rotating structure 210 includes a rotating shaft 211 spaced apart from the second side plate 222, and a supporting portion 212 connected between the rotating shaft 211 and the second side plate 222. The length of the rotating shaft 211 is greater than the width of the supporting portion 212. The rotating shaft 211 forms blocking surfaces 213 on both sides of the supporting portion 212 (see Figure 7 ), after the rotating shaft 211 is inserted into the first magnetic yoke 100, it can be limited by the blocking surface 213 and rotated in the first magnetic yoke 100.

[0030] Specifically, the first magnetic yoke 100 includes a bottom plate 110 and a first side plate 111 disposed on one side of the bottom plate 110 opposite the second side plate 222. The top side of the bottom plate 110 is connected to the conductive loop 400. An insertion hole 112 and a limiting hole 113 are provided at the bottom of the first side plate 111. The inner diameter of the insertion hole 112 is greater than or equal to the length of the rotating shaft 211. The inner diameter of the limiting hole 113 is less than the length of the rotating shaft 211 and greater than the width of the support portion 212.

[0031] First, move the second magnetic yoke 200 horizontally, pass the rotating shaft 211 through the insertion hole 112, and then move the second magnetic yoke 200 upward. While inserting the support part 212 into the limiting hole 113, make the rotating shaft 211 and the limiting hole 113 have the same height, and make the blocking surfaces 213 at both ends of the rotating shaft 211 contact with the first side plate 111 respectively to limit the rotating shaft 211, so that the rotating shaft 211 cannot leave the second magnetic yoke 200, and the rotating shaft 211 can rotate freely.

[0032] The T-shaped integrated rotating structure 210 of this embodiment not only has the characteristics of simple structure, low cost and easy assembly, but also the second magnetic yoke 200 is also detachable based on the detachable iron core mechanism 300, which is more convenient and lower-cost in the later maintenance process.

[0033] It is understandable that the rotating structure 210 can also be a common hinged method, such as through an independent rotating shaft 211 passing through the first side plate 111 and the second side plate 222 respectively, so that the first side plate 111 rotates on the rotating shaft 211. Although this will cause the second magnetic yoke 200 to have a complex structure and cannot be disassembled, it also falls within the scope of protection created by the present invention.

[0034] Furthermore, two first fixing holes 121 are provided on the top of the first side plate 111, and a second fixing hole 122 corresponding to the first fixing holes 121 is provided on the top of the second side plate 222. The first fixing holes 121 and the second fixing holes 122 are respectively engaged with connectors (not shown in the figure), which may be rivets. The connectors can pass through the first fixing holes 121 and the second fixing holes 122 and fix the first side plate 111 to the second side plate 222. Preferably, the connectors are disposed within the housing of the circuit breaker, and can simultaneously fix the first and second side plates to the housing of the circuit breaker.

[0035] It is understandable that the number and shape of the first fixing holes 121 and the second fixing holes 122 correspond to each other, and the number and shape can also be adjusted. Figure 9 The first fixing hole 121 on the left side is circular, and the first fixing hole 121 on the right side is oval-shaped. The oval-shaped first fixing hole 121 allows the connecting member to move laterally, and the reliability of the connection can be improved by adjusting the position of the connecting member.

[0036] Furthermore, the two clamping plates 221 are each provided with an inwardly protruding limiting structure 230. The distance between the limiting structure 230 and the second side plate 222 is greater than the thickness of the first side plate 111. When the clamping plates 221 secure the core mechanism 300 in place, the two limiting structures 230 are respectively engaged on the side of the first side plate 111 away from the second side plate 222, preventing the second magnetic yoke 200 from rotating freely. Of course, the number and shape of the limiting structures 230 can also be adjusted, and the limiting structures 230 can also be provided as hook structures or snap structures on the second side plate 222, all of which fall within the scope of protection of the invention.

[0037] like Figure 1 As shown, the first magnetic yoke 100 of this embodiment is provided with a thermal bimetallic strip 410, a contact plate 420, two contacts 430, and a flexible connector 440. The two contacts 430 are respectively connected to one end of the conductive loop 400 via the flexible connector 440. The other end of the conductive loop 400 is connected to the first magnetic yoke 100. The thermal bimetallic strip 410 and the contact plate 420 are located at the other end of the conductive loop 400 and connected to the first magnetic yoke 100. It is understood that the electromagnetic mechanism created by the present invention can also be provided without the thermal bimetallic strip 410 and the two contacts 430, or with only one contact, and this is not specifically limited here.

[0038] like Figure 10As shown, the core mechanism 300 of this embodiment includes a skeleton 310, and a static core 320, a movable core 330, a reaction spring 340, and a push rod 350, respectively disposed inside the skeleton 310. The push rod 350 is located between the static core 320 and the movable core 330. The reaction spring 340 is sleeved on the push rod 350. The conductive circuit 400 is wound around the skeleton 310 to form a coil. When the current flowing through it is too large, the conductive circuit 400 drives the movable core 330 to compress the reaction spring 340, pushing the push rod 350. When the driving force of the conductive circuit 400 disappears, the reaction spring 340 drives the movable core 330 to reset. This is not specifically limited here.

[0039] The assembly process of the electromagnetic release created by the present invention refers to Figure 2-7 As shown, Figure 4-7 The iron core mechanism 300 is hidden in:

[0040] First follow Figure 2 Install the core mechanism 300 into the conductive loop 400 in the direction Figure 3 Status, then follow Figure 4 Insert the rotating shaft 211 of the rotating structure 210 through the insertion hole 112 in the direction of the arrow, and then Figure 5 The second magnetic yoke 200 is lifted in the direction of the arrow, so that the support portion 212 of the rotating structure 210 is inserted into the limiting hole 113 , so that the second magnetic yoke 200 is rotatably connected to the first magnetic yoke 100 .

[0041] Then follow Figure 6 Rotate the second magnetic yoke 200 in the direction of the arrow so that the limiting structures 230 on the two clamping plates 221 are elastically interference fit into the upper limit of the first magnetic yoke 100. At this time, the matching state of the two clamping plates 221 and the core mechanism 300 is as shown in FIG. Figure 11 As shown, the assembly is now complete.

[0042] By means of the two clamps 221 respectively cooperating with the skeleton 310 of the core mechanism 300, the movement of the second magnetic yoke 200 can be limited in the left and right directions; by means of the clearance opening 223 of the clamp 221 being sleeved on the core mechanism 300, the downward movement of the second magnetic yoke 200 can be limited, and at the same time, the support part 212 is inserted into the limiting hole 113, which can limit the upward movement of the second magnetic yoke 200; by means of the blocking surface 213 on the rotating shaft 211 and the limiting structure 230 on the clamp 221 respectively cooperating with the side surface of the first side plate 111, the forward and backward movement of the second magnetic yoke 200 can be limited.

[0043] When the thermal bimetallic strip 410, the contact plate 420 and the conductive circuit 400 have faults such as misuse, deformation and failure, or when the iron core mechanism 300 has a fault, the above steps can be reversed to dismantle them, and the normal parts can be retained for reuse, or the faulty parts can be replaced.

[0044] The above is a further detailed description of the present invention in conjunction with specific preferred embodiments, and the specific implementation of the present invention should not be considered to be limited to these descriptions. For those skilled in the art to which the present invention belongs, simple deductions or substitutions can be made without departing from the concept of the present invention, and all of these should be considered to fall within the scope of protection of the present invention.

Claims

1. An electromagnetic release, characterized in that: The invention comprises a conductive circuit (400), an iron core mechanism (300), a first magnetic yoke (100) and a second magnetic yoke (200), wherein the conductive circuit (400) is mounted on the first magnetic yoke (100), the iron core mechanism (300) passes through the inner side of the conductive circuit (400), the second magnetic yoke (200) comprises a rotating structure (210) rotatably connected to the first magnetic yoke (100), and a blocking structure matched with the iron core mechanism (300), and the second magnetic yoke (200) can be rotated The moving structure (210) rotates around the center, driving the blocking structure to fix or release the iron core mechanism (300), the blocking structure comprising two clamping plates (221) arranged opposite to each other, the two clamping plates (221) being connected via a second side plate (222), the rotating structure (210) being arranged on the second side plate (222), the second side plate (222) being able to rotate around the rotating structure (210), and driving the two clamping plates (221) to move closer to or away from the iron core mechanism (300).

2. The electromagnetic release according to claim 1, characterized in that: The second magnetic yoke (200) includes a limiting structure (230) that cooperates with the first magnetic yoke (100); when the blocking structure and the iron core mechanism (300) are fixed, the limiting structure (230) and the first magnetic yoke (100) are limited.

3. The electromagnetic release according to claim 1, characterized in that: The second magnetic yoke (200) has a U-shaped structure.

4. The electromagnetic release according to claim 3, characterized in that: The two clamping plates (221) are further provided with a clearance opening (223), and the clearance opening (223) can be sleeved on the frame (310) of the iron core mechanism (300), so that the inner sides of the two clamping plates (221) respectively contact the two step surfaces on the frame (310) of the iron core mechanism (300), and the two step surfaces of the iron core mechanism (300) are clamped and fixed between the two clamping plates (221).

5. The electromagnetic release according to claim 3, characterized in that: The rotating structure (210) comprises a rotating shaft (211) spaced apart from the second side plate (222), and a supporting portion (212) connected between the rotating shaft (211) and the second side plate (222); the length of the rotating shaft (211) is greater than the width of the supporting portion (212); the rotating shaft (211) forms blocking surfaces (213) on both sides of the supporting portion (212); and after the rotating shaft (211) is inserted into the first magnetic yoke (100), it can be limited by the blocking surfaces (213) and rotated in the first magnetic yoke (100).

6. The electromagnetic release according to claim 5, characterized in that: The first magnetic yoke (100) is provided with an insertion hole (112) and a limiting hole (113) that are interconnected. The inner diameter of the insertion hole (112) is greater than or equal to the length of the rotating shaft (211), and the inner diameter of the limiting hole (113) is less than the length of the rotating shaft (211) and greater than the width of the supporting portion (212). After the rotating shaft (211) passes through the insertion hole (112), the supporting portion (212) can be inserted into the limiting hole (113), so that the blocking surfaces (213) at both ends of the rotating shaft (211) are respectively in contact with the first side plate (111).

7. The electromagnetic release according to claim 3, characterized in that: The first magnetic yoke (100) comprises a bottom plate (110) connected to the conductive circuit (400) and a first side plate (111) arranged on one side of the bottom plate (110) and opposite to the second side plate (222); the two clamping plates (221) are respectively provided with a limiting structure (230) protruding inward; the distance between the limiting structure (230) and the second side plate (222) is greater than the thickness of the first side plate (111); when the clamping plate (221) fixes the iron core mechanism (300), the limiting structure (230) is clamped on the side of the first side plate (111) away from the second side plate (222).

8. The electromagnetic release according to claim 7, characterized in that: The first side plate (111) is provided with a first fixing hole (121), and the second side plate (222) is provided with a second fixing hole (122) corresponding to the first fixing hole (121). The first fixing hole (121) and the second fixing hole (122) are respectively matched with a connecting piece, and the connecting piece can pass through the first fixing hole (121) and the second fixing hole (122) and fix the first side plate (111) and the second side plate (222).

9. The electromagnetic release according to claim 1, characterized in that: The first magnetic yoke (100) is provided with a thermal bimetallic strip (410), a contact plate (420), a contact (430) and a soft connection (440); the contact (430) is connected to one end of the conductive loop (400) through the soft connection (440); the thermal bimetallic strip (410) and the contact plate (420) are located at the other end of the conductive loop (400) and are connected to the first magnetic yoke (100).

10. The electromagnetic release according to claim 1, characterized in that: The iron core mechanism (300) comprises a frame (310), and a static iron core (320), a moving iron core (330), a reaction spring (340), and a push rod (350) respectively arranged inside the frame (310); the push rod (350) is located between the static iron core (320) and the moving iron core (330); the reaction spring (340) is sleeved on the push rod (350); and the conductive loop (400) is wound around the frame (310) to form a coil.

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