Tripping device and circuit breaker thereof

Abstract

The utility model discloses a tripping device and a circuit breaker, the tripping device comprises a circuit board assembly, a tripper, a tripper base and a first push rod, the tripper base is provided with a space for accommodating the tripper and a space for accommodating a circuit board element, the tripper is vertically installed in the space for accommodating the tripper, and the first push rod is arranged in the space for accommodating the circuit board element. A first push rod shaft is arranged on the wall of the space for containing the release, a shaft hole is formed in the first push rod, the first push rod is installed on the first push rod shaft through the shaft hole, the circuit board assembly is reversely installed on the space for containing the circuit board element, and the release comprises a shell, a magnetic flux converter and a release structure. The magnetic flux converter is installed in the shell and comprises a movable iron core moving vertically, the first push rod is further provided with a tripping structure contact part and a lock catch contact part, and during tripping, the movable iron core pushes the tripping structure contact part of the first push rod by pushing a tripping structure to enable the first push rod to rotate; through the scheme, the problem of low modularization level in the prior art is solved, and the beneficial effects of simplifying the structure and improving the efficiency are achieved.

Description

Technical Field

[0001] The present application relates to the technical field of low-voltage electrical appliances, and in particular to a tripping device and a circuit breaker thereof. Background Art

[0002] Electronic molded case circuit breakers have functions such as long delay, short circuit short delay, short circuit instantaneous and undervoltage protection, which can provide reliable protection for distribution lines and electrical equipment. All functions of electronic circuit breakers are realized by electronic releases. The electronic release mainly detects the current signal of the transformer. The transformer converts the large current signal into a small current signal and transmits it to the circuit board. The circuit board processes the signal according to the set instructions and instructs the flux converter to act, thereby cutting off the circuit and realizing the protection function. The existing large-size molded case circuit breakers have separate releases and controllers, which are non-modular, making production and installation inconvenient and production efficiency low. Summary of the invention

[0003] In view of the deficiencies of the prior art, the present application provides a tripping device and a circuit breaker thereof to solve the problems of low modularization level and low production efficiency in the prior art.

[0004] To achieve the above objectives, this application is implemented through the following technical solutions:

[0005] A tripping device includes a circuit board assembly, a tripper, and also includes a tripper base and a first push rod. The tripper base is provided with a space for accommodating the tripper and a space for accommodating circuit board components. The tripper is vertically installed in the space for accommodating the tripper. A first push rod shaft is provided on the wall of the space for accommodating the tripper. The first push rod is provided with a first push rod shaft hole and is installed on the first push rod shaft through the first push rod shaft hole. The circuit board assembly is reversely installed in the space for accommodating circuit board components. The tripper includes a shell, a flux converter and a tripping structure. The flux converter is installed in the shell and includes a moving iron core that moves vertically. The first push rod is also provided with a tripping structure contact portion and a locking contact portion. When tripping, the moving iron core pushes the tripping structure contact portion of the first push rod to rotate the first push rod by pushing the tripping structure.

[0006] Preferably, the first push rod shaft is a circular boss.

[0007] Preferably, the tripping structure includes a second push rod component, a third push rod, a support member, a support member spring, and a second push rod shaft. The second push rod component is installed on one side of the moving iron core at the top of the shell through the second push rod shaft and is provided with a lever rod shaft pushing portion, a moving iron core contact portion and a third push rod linkage shaft. The lever rod shaft pushing portion drives the second push rod component to rotate around the second push rod shaft and causes the moving iron core contact portion to move vertically downward. The second push rod component is connected to the other side of the moving iron core at the top of the shell through a support member at the far second push rod shaft end. The support member is pressed against the far second push rod shaft end of the second push rod component through a support member spring installed thereon, so that the second push rod component is connected to one end of the third push rod through the third push rod linkage shaft. When the second push rod component rotates, it drives the third push rod to move vertically. The third push rod also includes a first push rod pushing portion and drives the first push rod to rotate through this portion.

[0008] Preferably, a buckle is further provided on the wall of the space accommodating the releaser, and the releaser is installed into the space accommodating the releaser from the bottom of the releaser base and fixed in the space accommodating the releaser by using the buckle.

[0009] Preferably, the second push rod component is a split structure, including a second push rod, a fourth push rod and a push rod spring, the lever shaft pushing portion is arranged on the second push rod, the moving iron core contact portion and the third push rod linkage shaft are arranged on the fourth push rod, the second push rod and the fourth push rod are both provided with a second push rod axis hole, the second push rod axis passes through the second push rod axis hole, the second push rod and the fourth push rod rotate coaxially, the second push rod also includes a fourth push rod contact portion, the fourth push rod contact portion is located on the inner side of the surface where the fourth push rod moving iron core contact portion is located, a push rod spring mounting point is arranged on the reverse side of the fourth push rod contact portion, a push rod spring mounting point is also arranged at a corresponding position of the second push rod located at the push rod spring mounting point, and the push rod spring is installed between the two push rod spring mounting points.

[0010] Preferably, the second push rod is a sheet metal part, and the fourth push rod is a plastic part.

[0011] Preferably, the third push rod is L-shaped as a whole, the long side end of the L-shape is connected to the third push rod linkage shaft of the second push rod component, the third push rod moves along the long side direction of the L-shape, and the first push rod pushing portion of the third push rod is arranged on the short side of the L-shape.

[0012] Preferably, a surface of the shell corresponding to the third push rod is provided with a guide groove along the L-shaped long side of the third push rod, and the L-shaped long side of the third push rod moves in the guide groove.

[0013] Based on the same inventive concept, the present application also discloses a circuit breaker, including an operating mechanism, and also including the above-mentioned tripping device and a traction rod. The operating mechanism includes a rod shaft, a lever and two side plates, and arc holes are opened on the two side plates. The lever rotates around the lever shaft between the two side plates, and the rod shaft passes through the rod shaft holes on the two side bends of the lever and the arc holes on the side plates and is parallel to the lever shaft. When the lever rotates, the rod shaft moves in the arc hole, and the part of the rod shaft passing through the arc hole pushes the tripping structure of the tripper to move. The traction rod is installed outside the side plate and is also parallel to the lever shaft. A locking part is provided on the traction rod, and the locking part contacts with the locking contact part of the first push rod and forms a locking structure. When tripping, the first push rod rotates to drive its locking contact part and the locking part of the traction rod to release the locking structure.

[0014] Preferably, using the above-mentioned tripping device, the portion where the rod shaft passes through the arc-shaped hole pushes the lever rod shaft pushing portion of the second push rod component in the tripping structure to move downward.

[0015] A trip device and a circuit breaker proposed in the present application fix the trip device and the circuit board assembly on the same trip device base, so that the trip device and the controller are integrated, and a unique trip structure is provided, thereby solving the problems of low modularization level and low production efficiency in the prior art, simplifying the structure and improving production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of a three-dimensional structure from a side top perspective of an embodiment of a circuit breaker of the present application;

[0017] Figure 2 This is a schematic diagram of a three-dimensional structure from a side and bottom perspective of an embodiment of a release base of the present application;

[0018] Figure 3 This is a schematic diagram of the three-dimensional structure of an embodiment of a release device of the present application being assembled into an embodiment of a release device base from the bottom;

[0019] Figure 4 This is a schematic diagram of a three-dimensional structure from a side top view of an embodiment of a release device of the present application;

[0020] Figure 5 It is a schematic diagram of the positions of the parts and push rods of one embodiment of the release device of the present application from a side top view;

[0021] Figure 6 This is a schematic diagram of the assembly of the second push rod component and the second push rod shaft of the present application;

[0022] Figure 7 This is a schematic diagram of the three-dimensional structure of an embodiment of a traction rod of the present application from a side top perspective;

[0023] Figure 8It is a schematic diagram of the three-dimensional relationship between an embodiment of the mechanism of the present application and an embodiment of a releaser and a push rod in a locked state;

[0024] Fig. 9 A schematic diagram of the three-dimensional relationship between an embodiment of the mechanism of the present application and an embodiment of a releaser and a push rod in a tripped state;

[0025] Among them, 1-cover, 2-circuit board assembly, 21-arc baffle rib, 3-release device base, 31-circular boss, 32-first push rod, 33-clip, 4-release device, 41-shell, 42-second push rod, 43-third push rod, 44-fourth push rod, 45-push rod spring, 46-support member, 47-support member spring, 48-second push rod shaft, 49-magnetic flux converter, 491-moving iron core, 5-operating mechanism, 51-rod shaft, 52-lever, 53-traction rod, 531-locking part. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments.

[0027] The present embodiment provides a technical solution: a tripping device of the present application includes a circuit board assembly 2, a tripper 4, a tripper base 3, and a first push rod 32. The tripper base 3 is provided with a space for accommodating the tripper 4 and a space for accommodating circuit board components. The tripper 4 is vertically installed in the space for accommodating the tripper 4. A first push rod shaft is installed on the wall of the space for accommodating the tripper 4. The first push rod 32 is provided with a first push rod shaft hole and is installed on the first push rod shaft through the shaft hole. The circuit board assembly 2 is reversely installed on the space for accommodating the circuit board components. In terms of the space of the parts, the releaser includes a shell 41, a flux converter 49 and a release structure. The flux converter 49 is installed in the shell 41 and includes a moving iron core 491 that moves vertically. The first push rod 32 is also provided with a release structure contact portion and a lock contact portion. The release structure contact portion of this embodiment is located on one side of the first push rod shaft hole and extends a cylinder parallel to the first push rod shaft hole toward the releaser 4 at the end. When releasing, the moving iron core 491 pushes the release structure contact portion of the first push rod 32 to rotate the first push rod 32 by pushing the release structure.

[0028] The first push rod shaft may be a separate structure, and is installed by drilling a hole on the wall of the space accommodating the releaser 4. In this embodiment, in order to simplify the production process, the first push rod shaft is configured as a circular boss 31, which becomes a part of the releaser base 3.

[0029] A rib is provided on the top of the space wall accommodating the releaser 4, a buckle 33 is also provided on the space wall accommodating the releaser 4, and a plurality of small bosses are provided on the side of the releaser 4 corresponding to the buckle 33, so that the releaser 4 can be installed into the space accommodating the releaser 4 from the bottom of the releaser base 3 and fixed in the space accommodating the releaser 4 using the buckle 33, thereby avoiding the use of other cumbersome installation structures such as fasteners.

[0030] The release structure of the releaser 4 can be any suitable structure. In this embodiment, the release structure includes a second push rod component, a third push rod 43, a support member 46, a support member spring 47, and a second push rod shaft 48. The second push rod component is installed on one side of the moving iron core 491 at the top of the shell 41 through the second push rod shaft 48 and is provided with a lever rod shaft pushing portion, a moving iron core contact portion and a third push rod linkage shaft. The lever rod shaft pushing portion drives the second push rod component to rotate around the second push rod shaft 48 and causes the moving iron core contact portion to move vertically downward. The far second push rod shaft end of the second push rod component is connected to the other side of the moving iron core 491 at the top of the shell 41 through the support member 46. The support member 46 is pressed against the far second push rod shaft end of the second push rod component through the support member spring 47 installed thereon, so that the second push rod component is connected to one end of the third push rod 43 through the third push rod linkage shaft. When the second push rod component rotates, it drives the third push rod 43 to move vertically. The third push rod 43 also includes a first push rod pushing portion and pushes the first push rod 32 to rotate through this portion.

[0031] The second push rod component can be an integral structure or a split structure. For the convenience of installation and manufacturing, the present embodiment uses a split structure, that is, the second push rod component includes a second push rod 42, a fourth push rod 44 and a push rod spring 45. The lever shaft pushing portion is arranged on the second push rod 42, the moving iron core contact portion and the third push rod linkage shaft are arranged on the fourth push rod 44, the second push rod 42 and the fourth push rod 44 are both provided with a second push rod shaft hole, the second push rod shaft 48 passes through the second push rod shaft hole, the second push rod 42 and the fourth push rod 44 rotate coaxially, and the The second push rod 42 also includes a fourth push rod contact portion, and the fourth push rod contact portion is located on the inner side of the surface where the moving iron core contact portion of the fourth push rod 44 is located. A push rod spring mounting point is arranged on the reverse side of the fourth push rod contact portion, and a push rod spring mounting point is also arranged at a corresponding position of the second push rod 42 located at the push rod spring mounting point. The push rod spring 45 is installed between the two push rod spring mounting points. The function of the push rod spring 45 is to keep the second push rod 42 and the fourth push rod 44 moving synchronously. The push rod spring 45 can be omitted when the second push rod component is an integral whole.

[0032] In order to save costs, the second push rod 42 is a sheet metal part due to the large force it is subjected to, and the material in this embodiment is galvanized steel, and the fourth push rod 44 is a plastic part.

[0033] The third push rod 43 can be of any suitable shape. In this embodiment, the third push rod 43 is L-shaped as a whole, and the end of the long side of the L-shape is connected to the third push rod linkage shaft of the second push rod component. The third push rod 43 moves along the long side of the L-shape, and the first push rod pushing portion of the third push rod 43 is arranged on the short side of the L-shape.

[0034] In order to fix the movement direction of the third push rod 43, a guide groove is provided on the surface of the shell 41 corresponding to the third push rod 43 along the L-shaped long side of the third push rod 43, and the L-shaped long side of the third push rod 43 moves in the guide groove. In addition to being provided on the shell 41, the guide groove can also be provided at a corresponding position on the wall of the space where the releaser 4 is accommodated on the releaser base 3.

[0035] Based on the same inventive concept, the present application also discloses a circuit breaker, comprising a cover 1 of an arc extinguishing chamber, the aforementioned tripping device, an operating mechanism 5 and a traction rod 53, wherein the operating mechanism 5 comprises a rod shaft 51, a lever 52 and two side plates, wherein the two side plates are provided with arc holes, wherein the lever 52 rotates around the lever shaft between the two side plates, wherein the rod shaft 51 passes through the rod shaft holes on the two side bends of the lever 52 and the arc holes on the side plates and is parallel to the lever shaft, wherein the rod shaft 51 moves in the arc holes when the lever 52 rotates, and the portion where the rod shaft 51 passes through the arc holes pushes the tripping structure of the tripper 4 to move, wherein the traction rod 53 is installed outside the side plate and is also parallel to the lever shaft, wherein a locking portion 531 is provided on the traction rod 53, wherein the locking portion 531 contacts the locking contact portion of the first push rod 32 and forms a locking structure, wherein when tripping occurs, the first push rod 32 rotates to drive its locking contact portion and the locking portion of the traction rod 53 to release the locking structure. According to the above-mentioned embodiment of the tripping device, the portion of the rod shaft 51 passing through the arc-shaped hole pushes the lever rod shaft pushing portion of the second push rod component in the tripping structure to move downward.

[0036] After closing, the flux converter 49 gives an electronic trip signal, the moving iron core 491 releases and pushes the second push rod 42, the second push rod 42 drives the third push rod 43, thereby driving the first push rod 32 to rotate and push the locking part 531 of the traction rod 53 to trip.

[0037] When the release is released again, the lever 52 drives the rod shaft 51 to push the second push rod 42 of the releaser 4 downward, and the second push rod 42 pushes the moving iron core 491 of the magnetic flux converter 49 to reset downward.

[0038] In the description of the present application, it should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0039] The above is only a preferred specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can make equivalent substitutions or changes within the technical scope disclosed in the present application according to the technical solution and inventive concept of the present application, which should be covered by the protection scope of the present application.

Claims

1. A tripping device, comprising a circuit board assembly (2) and a tripping device (4), characterized in that: The device also comprises a releaser base (3) and a first push rod (32). The releaser base (3) is provided with a space for accommodating a releaser (4) and a space for accommodating circuit board components. The releaser (4) is vertically mounted in the space for accommodating the releaser (4). A first push rod shaft is provided on the wall of the space for accommodating the releaser (4). The first push rod (32) is provided with a first push rod shaft hole and is mounted on the first push rod shaft through the first push rod shaft hole. The circuit board assembly (2) is reversely mounted on the space for accommodating circuit board components. The releaser comprises a shell (41), a magnetic flux converter (49) and a release structure. The magnetic flux converter (49) is mounted in the shell (41) and comprises a vertically movable moving iron core (491). The first push rod (32) is also provided with a release structure contact portion and a locking contact portion. When releasing, the moving iron core (491) pushes the release structure contact portion of the first push rod (32) to rotate the first push rod (32) by pushing the release structure.

2. The tripping device according to claim 1, characterized in that: The first push rod shaft is a circular boss (31).

3. The tripping device according to claim 1, characterized in that: The release structure comprises a second push rod component, a third push rod (43), a support member (46), a support member spring (47), and a second push rod shaft (48). The second push rod component is installed on one side of the moving iron core (491) at the top of the shell (41) through the second push rod shaft (48) and is provided with a lever rod shaft pushing portion, a moving iron core contact portion, and a third push rod linkage shaft. The lever rod shaft pushing portion drives the second push rod component to rotate around the second push rod shaft (48) and causes the moving iron core contact portion to move vertically downward. The second push rod component is far The second push rod shaft end is connected to the other side of the moving iron core (491) at the top of the shell (41) through a support member (46); the support member (46) is supported on the second push rod shaft end far from the second push rod component by a support member spring (47) installed thereon; the second push rod component is connected to one end of the third push rod (43) through a third push rod linkage shaft; when the second push rod component rotates, the third push rod (43) is driven to move vertically; the third push rod (43) also includes a first push rod pushing portion and pushes the first push rod (32) to rotate through the first push rod pushing portion.

4. The tripping device according to claim 1, characterized in that: A buckle (33) is also provided on the wall of the space accommodating the releaser (4); the releaser (4) is installed into the space accommodating the releaser (4) from the bottom of the releaser base (3) and is fixed in the space accommodating the releaser (4) using the buckle (33).

5. The tripping device according to claim 3, characterized in that: The second push rod component is a split structure, comprising a second push rod (42), a fourth push rod (44) and a push rod spring (45); the lever shaft pushing portion is arranged on the second push rod (42); the moving iron core contact portion and the third push rod linkage shaft are arranged on the fourth push rod (44); the second push rod (42) and the fourth push rod (44) are both provided with a second push rod shaft hole; the second push rod shaft (48) passes through the second push rod shaft hole; the second push rod (42) and the fourth push rod (44) rotate coaxially; the second push rod (42) further comprises a fourth push rod contact portion, the fourth push rod contact portion is located on the inner side of the surface where the moving iron core contact portion of the fourth push rod (44) is located; a push rod spring mounting point is arranged on the reverse side of the fourth push rod contact portion; a push rod spring mounting point is also arranged on the second push rod (42) at a position corresponding to the push rod spring mounting point; and the push rod spring (45) is installed between the two push rod spring mounting points.

6. The tripping device according to claim 5, characterized in that: The second push rod (42) is a sheet metal part, and the fourth push rod (44) is a plastic part.

7. The tripping device according to claim 3, characterized in that: The third push rod (43) is L-shaped as a whole, the end of the long side of the L-shape is connected to the third push rod linkage shaft of the second push rod component, the third push rod (43) moves along the long side of the L-shape, and the first push rod pushing portion of the third push rod (43) is arranged on the short side of the L-shape.

8. The tripping device according to claim 7, characterized in that: A guide groove is provided on the surface of the shell (41) corresponding to the third push rod (43) along the L-shaped long side of the third push rod (43), and the L-shaped long side of the third push rod (43) moves in the guide groove.

9. A circuit breaker, comprising an operating mechanism (5), characterized in that: It also includes the release device and the traction rod (53) according to any one of claims 1 to 8, the operating mechanism (5) comprising a rod shaft (51), a lever (52) and two side plates, the two side plates are provided with arc holes, the lever (52) rotates around the lever shaft between the two side plates, the rod shaft (51) passes through the rod shaft holes on the two side bends of the lever (52) and the arc holes on the side plates and is parallel to the lever shaft, when the lever (52) rotates, the rod shaft (51) moves in the arc holes, the part of the rod shaft (51) passing through the arc holes pushes the release structure of the releaser (4) to move, the traction rod (53) is installed outside the side plate and is also parallel to the lever shaft, a locking part (531) is provided on the traction rod (53), the locking part (531) contacts with the locking contact part of the first push rod (32) and forms a locking structure, when the first push rod (32) rotates, drives its locking contact part and the locking part of the traction rod (53) to release the locking structure.

10. The circuit breaker according to claim 9, characterized in that: When using the release device according to claim 3, the portion of the rod shaft (51) passing through the arc-shaped hole pushes the lever rod shaft pushing portion of the second push rod component in the release structure to move downward.

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