Electromagnetic tripping mechanism and circuit breaker

Abstract

The invention 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 present invention relates to the technical field of circuit breakers, and in particular to an electromagnetic tripping mechanism and a circuit breaker using the same. Background Art

[0002] An electromagnetic release is an electrical component used to quickly cut off the current when the circuit is abnormal. It works on the electromagnetic principle. When the circuit is abnormal and the current needs to be cut off, the electromagnetic release will quickly act to trip the circuit breaker and cut off the circuit. Patent document CN110729157A discloses an electromagnetic release. The electromagnetic release in this patent document has a large number of components, a complex structure, and many transmission links, resulting in high production costs and poor action sensitivity. Summary of the invention

[0003] To this end, an object of the present invention is to provide an electromagnetic tripping mechanism with a relatively simple structure and sensitive operation, and a circuit breaker using the electromagnetic tripping mechanism.

[0004] To achieve the above object, the present invention provides the following technical solutions:

[0005] In the first aspect, the present invention provides an electromagnetic tripping mechanism, comprising a mounting seat, an electromagnetic assembly, a driving rod and a first spring; the electromagnetic assembly is mounted on the mounting seat, and the electromagnetic assembly is provided with a moving iron core that can move between a first position and a second position, the moving iron core is in the first position when the electromagnetic assembly is powered on and causes the first spring to store energy, and when the electromagnetic assembly is powered off, the first spring releases the stored energy and causes the moving iron core to move to the second position; the moving iron core is connected to a power output end, the driving rod can be movably connected to the mounting seat, and has a first connecting portion corresponding to the power output end and a second connecting portion for transmitting power to the outside.

[0006] In the above technical solution, the mounting seat has a mounting cavity, one end of the mounting cavity is provided with a loading port, the electromagnetic component is loaded into the mounting cavity through the loading port, and a locking structure for limiting the electromagnetic component is provided in the mounting cavity.

[0007] In the above technical solution, the locking structure includes a limit block and a stop spring buckle. The electromagnetic component is loaded into the installation cavity through the loading port and abuts against the limit block to form a stop. The stop spring buckle is formed on the side wall of the installation cavity. The stop spring buckle abuts against the electromagnetic component to limit the electromagnetic component from exiting the installation cavity through the loading port.

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

[0009] In the above technical solution, a limit slot and an avoidance slot arranged in a cross shape are provided at the center of the push rod, the avoidance slot penetrates the push rod axially, the limit slot has a depth along the axial direction of the push rod and a notch is provided at the end away from the electromagnetic component, a clamping block is provided at the end of the moving iron core, when the end of the moving iron core penetrates the push rod, the clamping block passes through the avoidance slot, and the moving iron core and the push rod are rotated relative to each other so that the clamping block is clamped into the limit slot through the notch.

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

[0011] In the above technical solution, a raised positioning column is provided on the mounting seat, a strip sliding hole is provided on the driving rod, the positioning column passes through the strip sliding hole, a limit stop platform is provided at the end of the positioning column for resisting and limiting the driving rod, and an avoidance through hole is connected to the strip sliding hole for the limit stop platform to pass through.

[0012] In the above technical solution, a second spring is connected between the driving rod and the mounting seat, and under the elastic force of the second spring, the first connecting part and the power output end form a resistance connection.

[0013] In the above technical solution, a micro switch is installed on the mounting seat.

[0014] In a second aspect, the present invention provides a circuit breaker, comprising the electromagnetic tripping mechanism described above.

[0015] The positive effects of the present invention are as follows: the structure is optimized in the present invention, the number of components in the electromagnetic tripping mechanism is significantly reduced, and the number of transmission links is correspondingly reduced, thereby effectively improving the sensitivity of the tripping action, and this structural setting is also conducive to simplifying the structure, reducing production costs, and has good practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the specific implementation of the present invention or the technical solution in the prior art, the following is a brief introduction to the drawings used in the description of the specific implementation. Similar elements or parts in the drawings are generally identified by similar reference numerals. The elements or parts in the drawings are not necessarily drawn according to the actual scale.

[0017] Figure 1 It is a three-dimensional diagram of the electromagnetic tripping mechanism in the present invention;

[0018] Figure 2 for Figure 1 A top view of the electromagnetic tripping mechanism shown;

[0019] Figure 3 For along Figure 2Sectional view cut along line AA;

[0020] Figure 4 and Figure 5 They are the structural diagrams of the ejector rod and the moving iron core respectively;

[0021] Figure 6 It is an exploded view of the electromagnetic tripping mechanism in the present invention;

[0022] Figure 7 This is a structural diagram of the electromagnetic tripping mechanism of the present invention when it is installed on the circuit breaker base.

[0023] The reference numerals shown in the figure are: 1-mounting seat; 11-mounting cavity; 12-loading entrance; 13-limit block; 14-stop spring buckle; 15-positioning column; 151-limit stop platform; 2-electromagnetic component; 21-moving iron core; 22-block; 3-driving rod; 31-first connecting part; 32-second connecting part; 33-strip sliding hole; 331-avoidance through hole; 4-first spring; 5-second spring; 6-top rod; 61-limit slot; 62-avoidance through slot; 7-micro switch; 8-circuit breaker base. DETAILED DESCRIPTION

[0024] The following embodiments of the technical solution of the present invention are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and are therefore only used as examples and cannot be used to limit the protection scope of the present invention.

[0025] It should be noted that, unless otherwise specified, the technical terms or scientific terms used in this application should have the common meanings understood by those skilled in the art to which the invention belongs.

[0026] In the first aspect, the electromagnetic tripping mechanism structure of the embodiment of the present invention is as follows Figures 1 to 6As shown, it includes a mounting seat 1, an electromagnetic assembly 2, a driving rod 3 and a first spring 4; the electromagnetic assembly 2 is mounted on the mounting seat 1, and the electromagnetic assembly 2 is provided with a moving iron core 21 that can move between a first position and a second position. In addition to the moving iron core 21, the electromagnetic assembly 2 generally includes components such as a yoke, a coil frame and an electromagnetic coil. When the electromagnetic coil is energized, the electromagnetic assembly 2 generates suction on the moving iron core 21, and when the electromagnetic coil is de-energized, the suction of the electromagnetic assembly 2 on the moving iron core 21 disappears. Its structure is prior art and will not be described in detail in this embodiment; when the electromagnetic assembly 2 is energized, the moving iron core 21 is in the first position and makes the second position A spring 4 is compressed to store energy, and when the electromagnetic assembly 2 is powered off, the first spring 4 releases the stored energy, so that the moving iron core 21 moves to the second position; the moving iron core 21 is connected to a power output end, and the drive rod 3 can be movably connected to the mounting seat 1, and has a first connection part 31 corresponding to the power output end and a second connection part 32 for transmitting power to the outside; the number of components in the electromagnetic tripping mechanism of this embodiment is significantly reduced, and the transmission links are correspondingly reduced, so that the sensitivity of the tripping action can be effectively improved, and this structural setting is also conducive to simplifying the structure, reducing production costs, and has good practicality. In actual applications, when the electromagnetic tripping mechanism is actuated, the drive rod 3 is driven to move, and then the driving force is output to the outside through the second connection part 32 on the drive rod 3 to achieve the purpose of external driving.

[0027] Further, combined with Figure 3 and Figure 6 As shown, a mounting cavity 11 is provided on the mounting seat 1, and a loading port 12 is provided at one end of the mounting cavity 11. The electromagnetic component 2 is loaded into the mounting cavity 11 through the loading port 12, and a locking structure is provided in the mounting cavity 11. After the electromagnetic component 2 is loaded into the mounting cavity 11, the electromagnetic component 2 is locked by the locking structure, so that the electromagnetic component 2 is reliably fixed in the mounting cavity 11.

[0028] In this embodiment, the structure of the locking structure is further optimized, and the locking structure is provided to include a limit block 13 and a stop spring buckle 14. The electromagnetic component 2 is loaded into the installation cavity 11 through the loading port 12 and abuts against the limit block 13 to form a stop. The stop spring buckle 14 is formed on the side wall of the installation cavity 11, and the stop spring buckle 14 abuts against the electromagnetic component 2 to prevent the electromagnetic component 2 from exiting the installation cavity 11 through the loading port 12. In this way, the electromagnetic component 2 can be quickly and effectively limited in the installation cavity 11.

[0029] Furthermore, a push rod 6 is installed at the end of the moving iron core 21 as the power output end. The push rod 6 is a hollow cylindrical structure. The end of the moving iron core 21 is inserted into the push rod 6 and is connected to the push rod 6. In order to facilitate the installation of the first spring 4, the first spring 4 adopts a spiral compression spring. The first spring 4 is sleeved on the push rod 6. One end of the first spring 4 is against the push rod 6, and the other end is against the electromagnetic component 2 or the mounting seat 1.

[0030] In order to further facilitate the assembly and connection between the push rod 6 and the moving iron core 21, a limit slot 61 and an avoidance slot 62 arranged in a cross shape are provided at the center of the push rod 6. The avoidance slot 62 axially penetrates the push rod 6. The limit slot 61 has a depth along the axial direction of the push rod 6 and a notch is provided at the end away from the electromagnetic assembly 2. A clamping block 22 is provided at the end of the moving iron core 21. When the end of the moving iron core 21 penetrates the push rod 6, the clamping block 22 passes through the avoidance slot 62. Then, the moving iron core 21 and the push rod 6 are relatively rotated so that the clamping block 22 is clamped into the limit slot 61 through the notch to form a limit connection. Under the elastic force of the first spring 4, the limit slot 61 and the clamping block 22 can remain clamped. In this state, the push rod 6 will not rotate circumferentially relative to the moving iron core 21, nor will it detach from the moving iron core 21. In this way, the push rod 6 can be effectively limited and installed at the end of the moving iron core 21. Figure 3 The shown orientation is for reference. 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 block 22 pulls the push rod 6 to move to the left. When the moving iron core 21 moves to the right, the first spring 4 pushes the push rod 6 to move to the right.

[0031] Preferably, the driving rod 3 is movably arranged on the mounting seat 1, and the movable direction of the driving rod 3 is the same as the movable direction of the moving iron core 21. Such an arrangement can make the power transmission drive between the moving iron core 21 and the driving rod 3 more direct and have good structural integrity.

[0032] See also Figure 1 , Figure 2 and Figure 6As shown, a raised positioning column 15 is provided on the mounting seat 1, and a strip sliding hole 33 is provided on the driving rod 3. The positioning column 15 passes through the strip sliding hole 33, and a limit stop 151 is provided at the end of the positioning column 15 for resisting and limiting the driving rod 3. The strip sliding hole 33 is connected to a bypass through hole 331 for the limit stop 151 to pass through. During assembly, the limit stop 151 passes through the bypass through hole 331, and then the strip sliding hole 33 is matched with the positioning column 15 by sliding the driving rod 3. The cooperation between the strip sliding hole 33 and the positioning column 15 can guide the movement of the driving rod 3. At the same time, the limiting stop 151 can prevent the driving rod 3 from detaching from the mounting seat 1, thereby ensuring the stability of the installation of the driving rod 3. In order to ensure the stability of the installation of the driving rod 3 , the limit stop 151 will not move into the avoidance through hole 331 within the normal range of the driving rod 3 during the use of the electromagnetic tripping mechanism, and the limit stop 151 maintains the limiting effect on the driving rod 3 .

[0033] In a preferred embodiment, a second spring 5 is connected between the driving rod 3 and the mounting seat 1. Under the elastic force of the second spring 5, the first connecting portion 31 and the power output end (i.e., the end face of the push rod 6) form a contact connection, which facilitates the formation of the connection between the driving rod 3 and the power output end, and is easy to assemble; when the electromagnetic assembly 2 is powered off and the moving iron core 21 moves from the first position to the second position, the power output end drives the driving rod 3 to move, thereby gradually compressing the second spring; when the electromagnetic assembly 2 is powered on and the moving iron core 21 moves from the second position to the first position, the second spring 5 releases its elastic force to push the driving rod 3 to follow the moving iron core 21. The second spring 5 is preferably a coil spring, one end of which is connected to the driving rod 3 and the other end is connected to the mounting seat 1.

[0034] In some embodiments, in order to enhance the functionality of the electromagnetic tripping mechanism, a micro switch 7 is installed on the mounting base 1. When applied to a circuit breaker, the circuit breaker state changes and the corresponding components are actuated to trigger the micro switch 7, thereby outputting a signal.

[0035] In the second aspect, the circuit breaker provided in the embodiment of the present invention adopts the electromagnetic tripping mechanism in any of the above embodiments; the specific electromagnetic tripping mechanism is installed on the circuit breaker base 8 (see Figure 7 As shown), when the electromagnetic tripping mechanism is actuated, it can trigger the circuit breaker traction rod through the second connecting portion 32 to trip the circuit breaker. This embodiment adopts the electromagnetic tripping mechanism in the above embodiment, so it has all the advantages of the electromagnetic tripping mechanism.

[0036] Obviously, the above embodiments of the present invention are merely examples for clearly explaining the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. However, these obvious changes or modifications derived from the essential spirit of the present invention still fall within the protection scope of the present invention.

Claims

1. An electromagnetic tripping mechanism, characterized in that: The invention comprises a mounting seat (1), an electromagnetic assembly (2), a driving rod (3) and a first spring (4); the electromagnetic assembly (2) is mounted on the mounting seat (1); the electromagnetic assembly (2) is provided with a moving iron core (21) which can move between a first position and a second position; when the electromagnetic assembly (2) is powered on, the moving iron core (21) is in the first position and causes the first spring (4) to store energy; when the electromagnetic assembly (2) is powered off, the first spring (4) releases the stored energy and causes the moving iron core (21) to move to the second position; the moving iron core (21) is connected to a power output end; the driving rod (3) is movably connected to the mounting seat (1) and has a first connecting portion (31) corresponding to the power output end and a second connecting portion (32) for transmitting power to the outside.

2. The electromagnetic tripping mechanism according to claim 1, characterized in that: The mounting seat (1) has a mounting cavity (11), one end of the mounting cavity (11) is provided with a loading port (12), the electromagnetic component (2) is loaded into the mounting cavity (11) through the loading port (12), and a locking structure for limiting the position of the electromagnetic component (2) is provided in the mounting cavity (11).

3. The electromagnetic tripping mechanism according to claim 2, characterized in that: The locking structure comprises a limit stopper (13) and a stop spring buckle (14); the electromagnetic component (2) is loaded into the installation cavity (11) through the loading port (12) and abuts against the limit stopper (13) to form a stop; the stop spring buckle (14) is formed on the side wall of the installation cavity (11); the stop spring buckle (14) abuts against the electromagnetic component (2) to limit the electromagnetic component (2) from exiting the installation cavity (11) through the loading port (12).

4. The electromagnetic tripping mechanism according to claim 1, characterized in that: The end of the moving iron core (21) is provided with a push rod (6) as the power output end. The push rod (6) is a hollow cylindrical structure. The end of the moving iron core (21) penetrates into the push rod (6) and is connected to the push rod (6). The first spring (4) is sleeved on the push rod (6).

5. The electromagnetic tripping mechanism according to claim 4, characterized in that: A cross-shaped limiting slot (61) and an avoidance slot (62) are provided at the center of the push rod (6); the avoidance slot (62) penetrates the push rod (6) axially; the limiting slot (61) has a depth along the axial direction of the push rod (6) and a notch is provided at the end away from the electromagnetic component (2); a clamping block (22) is provided at the end of the moving iron core (21); when the end of the moving iron core (21) penetrates the push rod (6), the clamping block (22) passes through the avoidance slot (62); and the moving iron core (21) and the push rod (6) are relatively rotated so that the clamping block (22) is clamped into the limiting slot (61) through the notch.

6. The electromagnetic tripping mechanism according to claim 1, characterized in that: The driving rod (3) is movably arranged on the mounting seat (1), and the movable direction of the driving rod (3) is the same as the movable direction of the moving iron core (21).

7. The electromagnetic tripping mechanism according to claim 6, characterized in that: The mounting seat (1) is provided with a raised positioning column (15), the driving rod (3) is provided with a strip-shaped sliding hole (33), the positioning column (15) passes through the strip-shaped sliding hole (33), a limit stop platform (151) for resisting and limiting the driving rod (3) is provided at the end of the positioning column (15), and the strip-shaped sliding hole (33) is connected to a avoidance through hole (331) for the limit stop platform (151) to pass through.

8. The electromagnetic tripping mechanism according to claim 1, characterized in that: A second spring (5) is connected between the driving rod (3) and the mounting seat (1), and under the elastic force of the second spring (5), the first connecting portion (31) forms a contact connection with the power output end.

9. The electromagnetic tripping mechanism according to claim 1, characterized in that: A micro switch (7) is mounted on the mounting seat (1).

10. A circuit breaker comprising the electromagnetic tripping mechanism according to any one of claims 1 to 8.

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