Electromagnetic tripping mechanism and circuit breaker

Abstract

The utility model discloses an electromagnetic tripping mechanism and a circuit breaker. The electromagnetic tripping mechanism comprises a mounting seat, an electromagnetic assembly, a driving rod, a first spring and a second spring, the electromagnetic assembly is mounted on the mounting seat, the electromagnetic assembly is provided with a movable iron core capable of moving between a first position and a second position, the movable iron core is located at the first position when the electromagnetic assembly is powered on and enables the first spring to store energy, and the first spring releases stored energy when the electromagnetic assembly is powered off, so that the movable iron core moves to the second position; the movable iron core is connected with a power output end, and the driving rod is movably connected to the installation base and provided with a first connecting part correspondingly connected with the power output end and a second connecting part used for transmitting power outwards. The electromagnetic tripping mechanism is simple in structure, convenient to assemble, low in manufacturing cost, higher in action sensitivity, more stable in use performance and good in practicability.

Description

TECHNICAL FIELD

[0001] The utility model relates to circuit breaker technical field, concretely relates to a electromagnetic tripping mechanism and use its circuit breaker. BACKGROUND

[0002] The electromagnetic tripping device is an electrical component, which is used for cutting off the current rapidly when the circuit is abnormal. It works by electromagnetic principle. When the circuit needs to be cut off due to abnormality, the electromagnetic tripping device will act rapidly to trip the circuit breaker and cut off the circuit. The patent document CN110729157A discloses an electromagnetic tripping device. The electromagnetic tripping device in the patent document has a large number of components, a complex structure and many transmission links, which results in high production cost and poor action sensitivity. SUMMARY

[0003] To this end, the utility model provides a kind of electromagnetic tripping mechanism with relatively simple structure and sensitive action, and the circuit breaker using the electromagnetic tripping mechanism.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions:

[0005] In the first aspect, the utility model provides an electromagnetic tripping mechanism, which includes a mounting seat, an electromagnetic assembly, a drive rod and a first spring. The electromagnetic assembly is mounted on the mounting seat. The electromagnetic assembly is provided with a moving iron core that can move between a first position and a second position. When the electromagnetic assembly is powered on, the moving iron core is in the first position and stores energy in the first spring. When the electromagnetic assembly is powered off, the first spring releases the stored energy, causing the moving iron core to move to the second position. The moving iron core is connected to a power output end. The drive rod is movably connected to the mounting seat and has a first connecting part corresponding to the power output end and a second connecting part for transmitting power externally.

[0006] In the above technical solution, the mounting seat has a mounting cavity. One end of the mounting cavity is provided with a mounting opening. The electromagnetic assembly is mounted in the mounting cavity through the mounting opening and is provided with a locking structure in the mounting cavity to limit the electromagnetic assembly.

[0007] In the above technical solution, the locking structure includes a limiting stopper and a stopper spring buckle. The electromagnetic assembly is mounted in the mounting cavity through the mounting opening and abuts against the limiting stopper to form a stop. The stopper spring buckle is formed on the side wall of the mounting cavity and abuts against the electromagnetic assembly to prevent the electromagnetic assembly from exiting the mounting cavity through the mounting opening.

[0008] In the above technical solution, the moving iron core is provided with a jacking rod at the end as the power output end. The jacking rod is a hollow cylindrical structure. The end of the moving iron core penetrates into the jacking rod and is connected to the jacking rod. The first spring is sleeved on the jacking rod.

[0009] In the technical scheme, the top rod is provided with a limiting clamping groove and an avoiding through groove in a cross shape at the center of the top rod, the avoiding through groove penetrates the top rod in the axial direction, the limiting clamping groove has a depth in the axial direction of the top rod and is provided with a notch at an end away from the electromagnetic assembly, the moving iron core is provided with a clamping block, the clamping block is passed through the avoiding through groove when the end of the moving iron core penetrates the top rod, and the moving iron core is relatively rotated with the top rod to make the clamping block clamped into the limiting clamping groove through the notch.

[0010] In the technical scheme, the driving rod is movably arranged on the mounting seat, and the movable direction of the driving rod is the same as the movable direction of the moving iron core.

[0011] In the technical scheme, the mounting seat is provided with a protruding positioning column, the driving rod is provided with a strip-shaped sliding hole, the positioning column is arranged through the strip-shaped sliding hole, a limiting stop is arranged at the end of the positioning column to limit the driving rod, and an avoiding through hole is arranged in the strip-shaped sliding hole to allow the limiting stop to pass through.

[0012] In the technical scheme, a second spring is connected between the driving rod and the mounting seat, and the first connecting part is in abutting connection with the power output end under the elastic force of the second spring.

[0013] In the technical scheme, the mounting seat is provided with a micro switch.

[0014] In the second aspect, the utility model provides a circuit breaker, including above -mentioned electromagnetic tripping mechanism.

[0015] The utility model has the following advantages: the structure is optimized in the utility model, the number of components in the electromagnetic tripping mechanism is obviously reduced, the transmission link is correspondingly reduced, thereby the sensitivity of tripping action can be effectively improved, and the structure is also conducive to simplifying the structure and reducing the production cost, and has good practicability. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the specific embodiment of the utility model or the technical scheme in the prior art, the following briefly introduces the drawings used in the specific embodiment description. In the drawings, similar elements or parts are generally identified by similar reference numerals. The elements or parts in the drawings are not necessarily drawn according to the actual proportion.

[0017] Figure 1 It is a perspective view of the electromagnetic tripping mechanism in the utility model;

[0018] Figure 2 It is a perspective view of the electromagnetic tripping mechanism in the utility model; Figure 1 It is a top view of the electromagnetic tripping mechanism shown in the figure;

[0019] Figure 3 is the sectional view along Figure 2 the line A-A in the figure;

[0020] Figure 4 and Figure 5 respectively are the structure diagram of the ejector rod and the moving iron core;

[0021] Figure 6 is the explosion view of the electromagnetic tripping mechanism in the utility model;

[0022] Figure 7 is the structure diagram when the electromagnetic tripping mechanism in the utility model is installed on the circuit breaker base.

[0023] The reference signs shown in the figure are: 1 - mounting seat; 11 - mounting cavity; 12 - mounting port; 13 - limiting stop block; 14 - stop spring buckle; 15 - positioning column; 151 - limiting stop table; 2 - electromagnetic assembly; 21 - moving iron core; 22 - clamping block; 3 - driving rod; 31 - first connecting part; 32 - second connecting part; 33 - strip-shaped sliding hole; 331 - avoiding through hole; 4 - first spring; 5 - second spring; 6 - ejector rod; 61 - limiting clamping groove; 62 - avoiding through slot; 7 - micro switch; 8 - circuit breaker base. DETAILED DESCRIPTION

[0024] The embodiments of the technical scheme of the utility model will be described in detail below in combination with the drawings. The following embodiments are only used for more clearly illustrating the technical scheme of the utility model, therefore only as an example, cannot limit the protection scope of the utility model by this.

[0025] It should be noted that, unless otherwise specified, the technical terms or scientific terms used in the present application should be the usual meaning understood by the technical personnel in the field of the utility model.

[0026] In the first aspect, the structure of the electromagnetic tripping mechanism in the utility model embodiment is as shown in Figures 1 to 6As shown, it comprises a mounting base 1, an electromagnetic assembly 2, a driving rod 3 and a first spring 4; the electromagnetic assembly 2 is mounted on the mounting base 1, the electromagnetic assembly 2 is provided with a moving iron core 21 which can move between a first position and a second position, in addition to the moving iron core 21, the electromagnetic assembly 2 usually further comprises a magnetic yoke, a coil frame and an electromagnetic coil and the like components, when the electromagnetic coil is powered, the electromagnetic assembly 2 generates an attractive force to the moving iron core 21, when the electromagnetic coil is powered off, the attractive force of the electromagnetic assembly 2 to the moving iron core 21 disappears, its structure is the prior art, which will not be described in detail in the embodiment; the moving iron core 21 is in the first position when the electromagnetic assembly 2 is powered on and compresses the energy storage of the first spring 4, the first spring 4 releases the energy storage when the electromagnetic assembly 2 is powered off, so that the moving iron core 21 moves to the second position; the moving iron core 21 is connected with a power output end, the driving rod 3 is movably connected on the mounting base 1 and has a first connecting part 31 corresponding to the power output end and a second connecting part 32 for transmitting power to the outside; the number of components constituting the electromagnetic tripping mechanism in the embodiment is obviously reduced, the transmission link is correspondingly reduced, so that the sensitivity of the tripping action can be effectively improved, and such structure is also conducive to simplifying the structure and reducing the production cost, which has good practicability. In practical application, the electromagnetic tripping mechanism drives the driving rod 3 to move, and then outputs driving force to the outside through the second connecting part 32 on the driving rod 3, so as to achieve the purpose of external driving.

[0027] Further, in combination with Figure 3 and Figure 6 As shown, a mounting cavity 11 is arranged on the mounting base 1, one end of the mounting cavity 11 is provided with a mounting opening 12, the electromagnetic assembly 2 is mounted into the mounting cavity 11 through the mounting opening 12, and a locking structure is arranged in the mounting cavity 11, after the electromagnetic assembly 2 is mounted into the mounting cavity 11, the electromagnetic assembly 2 is locked through the locking structure, so that the electromagnetic assembly 2 can be reliably fixed in the mounting cavity 11.

[0028] In the embodiment, the structure of the locking structure is further optimized, the locking structure comprises a limiting stop block 13 and a stop spring buckle 14, the electromagnetic assembly 2 is mounted into the mounting cavity 11 through the mounting opening 12 and abuts against the limiting stop block 13 to form a stop, the stop spring buckle 14 is formed on the side wall of the mounting cavity 11, and the stop spring buckle 14 abuts against the electromagnetic assembly 2 to prevent the electromagnetic assembly 2 from exiting the mounting cavity 11 through the mounting opening 12, so that the electromagnetic assembly 2 can be quickly and effectively limited in the mounting cavity 11.

[0029] Further, the moving iron core 21 is provided with a top rod 6 as the power output end, the top rod 6 is a hollow column structure, the moving iron core 21 penetrates into the top rod 6 and is connected with the top rod 6, in order to facilitate the installation of the first spring 4, the first spring 4 is a spiral compression spring, the first spring 4 is sleeved on the top rod 6, one end of the first spring 4 abuts against the top rod 6, and the other end abuts against the electromagnetic assembly 2 or the mounting base 1.

[0030] Further, in order to facilitate the assembly and connection of the top rod 6 and the moving iron core 21, the top rod 6 is provided with a limiting clamping groove 61 and an avoiding through groove 62 which are arranged in a cross shape, the avoiding through groove 62 penetrates the top rod 6 along the axial direction, the limiting clamping groove 61 has a depth along the axial direction of the top rod 6 and is provided with a notch at the end away from the electromagnetic assembly 2, the moving iron core 21 is provided with a clamping block 22, when the moving iron core 21 penetrates into the top rod 6, the clamping block 22 passes through the avoiding through groove 62, then the moving iron core 21 is relatively rotated with the top rod 6, so that the clamping block 22 is clamped into the limiting clamping groove 61 through the notch, thereby forming a limiting connection, under the elastic force of the first spring 4, the limiting clamping groove 61 and the clamping block 22 can be clamped, in this state, the top rod 6 cannot rotate relative to the moving iron core 21 in the circumferential direction, and cannot be separated from the moving iron core 21, so that the top rod 6 can be effectively limited and installed at the end of the moving iron core 21. Figure 3 As shown in the orientation, when the moving iron core 21 moves from the first position to the second position, it moves from left to right, when the moving iron core 21 moves from the second position to the first position, it moves from right to left, when the moving iron core 21 moves to the left, the top rod 6 is pulled to move to the left through the clamping block 22, when the moving iron core 21 moves to the right, the top rod 6 is pushed to move to the right through the first spring 4.

[0031] Preferably, the driving rod 3 is movably arranged on the mounting base 1, the movable direction of the driving rod 3 is the same as the movable direction of the moving iron core 21, so that the power transmission and driving between the moving iron core 21 and the driving rod 3 is more direct, and the structure has good integrity.

[0032] Referring to Figure 1 , Figure 2 and Figure 6As shown, the mounting base 1 is provided with a protruding positioning column 15, the driving rod 3 is provided with a strip-shaped sliding hole 33, the positioning column 15 penetrates through the strip-shaped sliding hole 33, a limiting stop 151 for resisting and limiting the driving rod 3 is arranged at the end of the positioning column 15, the strip-shaped sliding hole 33 is provided with an avoiding through hole 331 for the limiting stop 151 to penetrate through, when assembled, the limiting stop 151 penetrates through the avoiding through hole 331, then the strip-shaped sliding hole 33 is matched with the positioning column 15 by sliding the driving rod 3, the strip-shaped sliding hole 33 and the positioning column 15 can guide the movement of the driving rod 3, and the limiting stop 151 can prevent the driving rod 3 from separating from the mounting base 1, thereby ensuring the stability of the driving rod 3.

[0033] In the preferred embodiment, the second spring 5 is connected between the driving rod 3 and the mounting base 1, the first connecting part 31 is in contact with the power output end (i.e. the end face of the ejector rod 6) under the elastic force of the second spring 5, thereby facilitating the connection between the driving rod 3 and the power output end, and facilitating assembly; when the electromagnetic assembly 2 is powered off, the movable iron core 21 moves from the first position to the second position, the power output end drives the driving rod 3 to move, and the second spring is gradually compressed; when the electromagnetic assembly 2 is powered on, the movable iron core 21 moves from the second position to the first position, the second spring 5 releases the elastic force to drive the driving rod 3 to move with the movable iron core 21. The second spring 5 is preferably a spiral spring, one end of which is connected to the driving rod 3, and the other end is connected to the mounting base 1.

[0034] In some embodiments, in order to enhance the functionality of the electromagnetic tripping mechanism, the micro switch 7 is mounted on the mounting base 1, when applied to the circuit breaker, the micro switch 7 is triggered by the change of the state of the circuit breaker and the corresponding components, thereby outputting a signal.

[0035] In the second aspect, the circuit breaker provided in the embodiments of the utility model adopts the electromagnetic tripping mechanism in any of the above embodiments; specifically, the electromagnetic tripping mechanism is mounted on the circuit breaker base 8 (see Figure 7 When the electromagnetic tripping mechanism acts, the second connecting part 32 can trigger the circuit breaker pull rod to trip the circuit breaker, and the electromagnetic tripping mechanism in the embodiments has all the advantages of the electromagnetic tripping mechanism.

[0036] Obviously, the above embodiments of the present application are merely examples for clearly illustrating the present application, and are not intended to limit the implementation modes of the present application. For those skilled in the art, other different forms of changes or variations can be made on the basis of the above description. Here, it is not necessary and impossible to exhaust all the implementation modes. The obvious changes or variations extended from the essential spirit of the present application still belong to the protection scope of the present application.

Claims

1. An electromagnetic trip unit characterized by, The utility model provides a drive rod (3) and first spring (4) are included installation seat (1), electromagnetic assembly (2), the drive rod (3) is movably connected on the installation seat (1), and the drive rod (3) has the first connecting portion (31) corresponding connection of power output end of the movable iron core (21) connection, and the second connecting portion (32) for transmitting power to outside.

2. The electromagnetic trip unit of claim 1, wherein, The installation seat (1) has a mounting cavity (11) on it, one end of the mounting cavity (11) is provided with a mounting entrance (12), the electromagnetic assembly (2) is mounted into the mounting cavity (11) through the mounting entrance (12), and the mounting cavity (11) is provided with a locking structure for limiting the electromagnetic assembly (2).

3. The electromagnetic trip unit of claim 2, wherein, The locking structure includes a limiting stopper (13) and a stop spring buckle (14), the electromagnetic assembly (2) is mounted into the mounting cavity (11) through the mounting entrance (12) and abuts against the limiting stopper (13) to form a stop, the stop spring buckle (14) is formed on the side wall of the mounting cavity (11), and the stop spring buckle (14) abuts against the electromagnetic assembly (2) to limit the electromagnetic assembly (2) from exiting the mounting cavity (11) through the mounting entrance (12).

4. The electromagnetic trip unit of claim 1, wherein, The movable iron core (21) is provided with a jacking rod (6) at the end as the power output end, the jacking rod (6) is a hollow column structure, the movable iron core (21) penetrates into the jacking rod (6) and is connected with the jacking rod (6), and the first spring (4) is sleeved on the jacking rod (6).

5. The electromagnetic trip unit of claim 4, wherein, The jacking rod (6) is provided with a limiting clamping groove (61) and a avoiding through slot (62) in the center in a cross shape, the avoiding through slot (62) penetrates the jacking rod (6) along the axial direction, the limiting clamping groove (61) has a depth along the axial direction of the jacking rod (6) and is provided with a notch at the end away from the electromagnetic assembly (2), the movable iron core (21) is provided with a clamping block (22), when the movable iron core (21) penetrates into the jacking rod (6), the clamping block (22) passes through the avoiding through slot (62), and the movable iron core (21) is relatively rotated with the jacking rod (6) to make the clamping block (22) be clamped into the limiting clamping groove (61) from the notch.

6. The electromagnetic trip unit of claim 1, wherein, The drive rod (3) is movably arranged on the installation seat (1), and the movable direction of the drive rod (3) is the same as the movable direction of the movable iron core (21).

7. The electromagnetic trip unit of claim 6, wherein, The installation seat (1) is provided with a raised positioning column (15), the drive rod (3) is provided with a strip-shaped sliding hole (33), the positioning column (15) penetrates through the strip-shaped sliding hole (33), a limiting stop (151) for resisting and limiting the drive rod (3) is arranged at the end of the positioning column (15), and the strip-shaped sliding hole (33) is continuously provided with an avoiding through hole (331) for the limiting stop (151) to pass through.

8. The electromagnetic trip unit of claim 1, wherein, A second spring (5) is connected between the driving rod (3) and the mounting base (1), and the first connecting part (31) is in abutting connection with the power output end under the elastic force of the second spring (5).

9. The electromagnetic trip unit of claim 1, wherein, The mounting base (1) is provided with a micro switch (7).

10. A circuit breaker comprising the electromagnetic trip unit of any one of claims 1 to 8.

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