A tripping structure of a circuit breaker

Abstract

The present invention relates to the technical field of circuit breakers. Specifically, it relates to a tripping structure of a circuit breaker, which includes a housing. A cover plate is arranged on the outer side of the housing, and an iron bracket is arranged inside the housing. A tripping mechanism is arranged on the inner side of the iron bracket. The tripping mechanism includes a handle. A locking ring is arranged on one side of the handle. A stress point is arranged on one side of the locking ring. A locking ring support edge is arranged on the other side of the locking ring. A locking catch is arranged on the side of the locking ring away from the handle. A locking catch pin shaft is rotatably connected to the middle of the locking catch. One side of the locking catch is in snap-fit connection with the locking ring support edge, and a locking catch support leg is arranged on the other side of the locking catch. The design of the present invention is more stable and reliable compared with the prior art. It has low precision requirements for the parts related to tripping, ensures smooth tripping, and will not cause the situation of failure to trip. The tripping structure of this circuit breaker has low requirements for the friction surfaces of the parts related to tripping, will not cause wear of the parts after long-term use, and will not cause non-tripping phenomena due to changes in friction force caused by wear, thereby being able to extend the service life of the circuit breaker.

Description

Technical Field

[0001] The present invention relates to the technical field of circuit breakers, and more particularly, to a tripping structure of a circuit breaker. Background Art

[0002] A circuit breaker is a switching device that can close, carry, and interrupt the current under normal circuit conditions and can close, carry, and interrupt the current under abnormal circuit conditions within a specified time. The existing tripping structures of similar circuit breakers are of the suction type for tripping. This method is not stable and reliable enough during tripping. The state of the mutually rubbing surfaces has a great influence on the consistent stability of the frictional force, requires a high precision for the parts related to tripping, is prone to tripping failure, has a high production and manufacturing cost, and has high requirements for the rubbing surfaces of the parts related to tripping. Prolonged use is likely to cause wear of the parts, affecting the reliability and service life of the circuit breaker tripping. Summary of the Invention

[0003] The purpose of the present invention is to provide a tripping structure of a circuit breaker to solve the problems raised in the above background art.

[0004] To achieve the above purpose, the present invention provides a tripping structure of a circuit breaker, including a housing. A cover plate is arranged on the outer side of the housing. An iron bracket is arranged inside the housing. A tripping mechanism is arranged inside the iron bracket. The tripping mechanism includes a handle. A lock ring is arranged on one side of the handle. A stress point is arranged on one side of the lock ring. A lock ring support edge is arranged on the other side of the lock ring. A lock catch is arranged on the side of the lock ring away from the handle. A lock catch pin shaft is rotatably connected to the middle of the lock catch. One side of the lock catch is in snap-fit connection with the lock ring support edge. A lock catch support leg is arranged on the other side of the lock catch. A lock catch return spring is installed on the lock catch pin shaft. A moving contact arm is arranged on one side of the handle. A moving contact is tightly welded to the outer wall of one end of the moving contact arm. A main spring is arranged inside the moving contact arm. The main spring is connected to the moving contact arm near the moving contact. One end of the main spring is connected to the lock ring. An external wiring terminal is arranged on the outer side of the moving contact arm. A static contact is tightly welded to the outer wall of the external wiring terminal near the moving contact. An armature is arranged outside one side of the lock catch. An armature support wall is tightly welded to one end of the armature. An armature pin shaft is rotatably connected to the middle of the armature support wall. An armature return spring is installed on the armature pin shaft.

[0005] Preferably, the cover plate is fixed to the housing by rivets.

[0006] Preferably, pin holes are formed on the surface of the iron bracket near the lock catch pin shaft and the armature pin shaft. The lock catch pin shaft and the armature pin shaft are rotatably connected to the pin holes.

[0007] Preferably, a lock ring shaft hole is formed on the surface of the iron bracket.

[0008] Preferably, a handle pin is rotatably connected to the middle of the handle. A handle pin hole is formed in the surface of the iron bracket near the handle pin, and the handle pin is rotatably connected to the handle pin hole.

[0009] Preferably, a chuck is provided on the upper part of one side of the handle close to the lock ring. When the outer end of the handle rotates upward, the chuck can press the upper part of one side of the lock ring. A moving contact arm connecting shaft is tightly welded to the handle close to the moving contact arm, and the moving contact arm connecting shaft is rotatably connected to one end of the moving contact arm.

[0010] Preferably, the outer wall of one side of the iron bracket is closely attached to the inner wall of the housing.

[0011] Preferably, one end of the main spring is connected to the moving contact arm through a spring buckle, and the other end hooks the groove of the stress point.

[0012] Preferably, a gripping handle is tightly welded to the outer end of the handle.

[0013] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0014] The tripping structure of this circuit breaker is more stable and reliable compared with the prior art. The impact tripping is much more stable and reliable than the static suction tripping, and the precision requirements for the tripping-related parts are not high, ensuring smooth tripping and preventing the situation of failure to trip.

[0015] The tripping structure of this circuit breaker has lower requirements for the friction surfaces of the tripping-related parts. Long-term use will not cause part wear and the change of friction force caused by wear, thus being able to extend the service life of the circuit breaker. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is an exploded structural schematic diagram of the present invention;

[0017] Figure 2 is an internal structural schematic diagram of the OFF state when the lock ring of the present invention is locked;

[0018] Figure 3 is an internal structural schematic diagram of the ON state when the lock ring of the present invention is locked;

[0019] Figure 4 is an internal structural schematic diagram of the OFF state when the lock ring of the present invention is unlocked;

[0020] Figure 5 is a structural schematic diagram of the tripping in the present invention;

[0021] Figure 6 is a structural schematic diagram of the iron bracket in the present invention;

[0022] Figure 7This is a schematic structural diagram of the handle in the present invention.

[0023] In the figure: 1. Outer shell; 2. Cover plate; 3. Iron bracket; 31. Pin shaft hole; 32. Lock ring shaft hole; 33. Handle pin hole; 4. Trip; 41. Handle; 411. Handle pin; 412. Chuck; 413. Moving contact arm connecting shaft; 414. Holding handle; 42. Lock ring; 421. Force application point; 422. Lock ring support edge; 43. Lock catch; 431. Lock catch pin shaft; 432. Lock catch support leg; 433. Lock catch return spring; 44. Moving contact arm; 441. Moving contact; 45. Main spring; 451. Spring buckle; 46. External wiring terminal; 461. Static contact; 47. Armature; 471. Armature pin shaft; 472. Armature return spring; 473. Armature support wall. Detailed implementation manners

[0024] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0025] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present invention.

[0026] The present invention provides a trip structure for a circuit breaker, as Figures 1 - 7As shown in the figure, it includes a housing 1, and a cover plate 2 is arranged on the outer side of the housing 1 to facilitate the protection of the internal components of the housing 1. An iron bracket 3 is arranged inside the housing 1, and a release 4 is arranged on the inner side of the iron bracket 3. The internal release 4 is fixed and positioned by the iron bracket 3. The release 4 includes a handle 41, a lock ring 42 is arranged on one side of the handle 41, a force application point 421 is arranged on one side of the lock ring 42, a lock ring support edge 422 is arranged on the other side of the lock ring 42, a lock catch 43 is arranged on the side of the lock ring 42 away from the handle 41, a lock catch pin shaft 431 is rotatably connected to the middle of the lock catch 43, one side of the lock catch 43 is in snap-fit connection with the lock ring support edge 422, a lock catch support leg 432 is arranged on the other side of the lock catch 43, a lock catch return spring 433 is installed on the lock catch pin shaft 431, a moving contact arm 44 is arranged on one side of the handle 41, the middle of the moving contact arm 44 is rotatably connected to the inner wall of the housing 1 through a rotating shaft, there is a gap between the moving contact arm 44 and the inner wall of the housing 1, the bottom end of the lock ring 42 is stuck inside one end of the moving contact arm 44, a moving contact point 441 is closely welded to the outer wall of one end of the moving contact arm 44, a main spring 45 is arranged inside the moving contact arm 44, the main spring 45 is connected to the moving contact arm 44 near the moving contact point 441, one end of the main spring 45 is connected to the lock ring 42, an external wiring terminal 46 is arranged on the outer side of the moving contact arm 44, a static contact point 461 is closely welded to the outer wall of the external wiring terminal 46 near the moving contact point 441, an armature 47 is arranged outside one side of the lock catch 43, an armature support wall 473 is closely welded to one end of the armature 47, an armature pin shaft 471 is rotatably connected to the middle of the armature support wall 473, and an armature return spring 472 is installed on the armature pin shaft 471.

[0027] Specifically, the cover plate 2 is fixed on the housing 1 by rivets, which facilitates the disassembly and installation of the cover plate 2 and is convenient for later maintenance.

[0028] In addition, pin holes 31 are provided on the surface of the iron bracket 3 near the lock catch pin shaft 431 and the armature pin shaft 471. The lock catch pin shaft 431 and the armature pin shaft 471 are both rotatably connected to the pin holes 31, which facilitates the installation of the lock catch 43 and the armature 47.

[0029] Furthermore, a lock ring shaft hole 32 is provided on the surface of the iron bracket 3 to facilitate the installation of the lock ring 42.

[0030] Furthermore, a handle pin 411 is rotatably connected to the middle of the handle 41. A handle pin hole 33 is provided on the surface of the iron bracket 3 near the handle pin 411. The handle pin 411 is rotatably connected to the handle pin hole 33, which facilitates the installation and fixation of the handle 41.

[0031] Further, a chuck 412 is provided at the upper part of one side of the handle 41 close to the lock ring 42. When the outer end of the handle 41 rotates upward, the chuck 412 can press the upper part of one side of the lock ring 42 tightly. A moving contact arm connecting shaft 413 is closely welded to the handle 41 near the moving contact arm 44. The moving contact arm connecting shaft 413 is rotatably connected to one end of the moving contact arm 44. By rotating the handle 41 upward, the moving contact arm connecting shaft 413 on the handle moves downward, loses stability when exceeding the force application point 421 of the main spring 45, and separates the moving contact point 441 at one end of the moving contact arm 44 from the static contact point 461, realizing an open circuit. By rotating the handle 41 downward, the position conversion between the moving contact arm connecting shaft 413 and the force application point 421 can make the moving contact point 441 at one end of the moving contact arm 44 contact the static contact point 461, realizing a closed circuit.

[0032] Further, the outer wall of one side of the iron bracket 3 is closely attached to the inner wall of the housing 1 to ensure the positioning of the iron bracket 3.

[0033] Further, one end of the main spring 45 is connected to the moving contact arm 44 through a spring buckle 451, and the other end is connected to the force application point 421, which is convenient for the disassembly and installation of the main spring 45.

[0034] Further, a gripping handle 414 is closely welded to the outer end of the handle 41, which is convenient for the hand to hold and drive the handle 41 to rotate up and down.

[0035] When the tripping structure of the circuit breaker in this embodiment is in use, when the lock ring 42 is locked tightly, the handle 41 rotates downward to make the moving contact point 441 contact the static contact point 461, which can ensure the power-on of the circuit. When the handle 41 rotates upward to separate the moving contact point 441 from the static contact point 461, it can ensure the power-off of the circuit. When the current passing through the coil inside the circuit breaker is overloaded or short-circuited, the iron core in the coil generates a relatively large electromagnetic force to attract the armature 47. The armature support wall 473 at one end of the armature 47 impacts the lock catch leg 432 of the lock catch 43, thereby driving the lock catch 43 to rotate and separating from the lock ring support edge 422 on one side of the lock ring 42. Then, under the pulling force of the main spring 45, the lock ring 42 rotates around the lock ring pin shaft. At this time, the bottom end of the lock ring 42 disengages from the inner side of the moving contact arm 44, and the moving contact arm 44 loses stability and disengages, causing the moving contact point 441 to lose stability and trip, thereby cutting off the circuit and ensuring the safety of the circuit.

[0036] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and the descriptions in the specification are only preferred examples of the present invention and do not limit the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. A trip structure of a circuit breaker, comprising a housing (1), Characterized in that: A cover plate (2) is arranged on the outer side of the housing (1), an iron bracket (3) is arranged inside the housing (1), a trip (4) is arranged on the inner side of the iron bracket (3), the trip (4) includes a handle (41), a lock ring (42) is arranged on one side of the handle (41), a stress point (421) is arranged on one side of the lock ring (42), a lock ring support edge (422) is arranged on the other side of the lock ring (42), a lock catch (43) is arranged on the side of the lock ring (42) away from the handle (41), a lock catch pin shaft (431) is rotatably connected to the middle of the lock catch (43), one side of the lock catch (43) is in clamping fit with the lock ring support edge (422), a lock catch support leg (432) is arranged on the other side of the lock catch (43), a lock catch return spring (433) is installed on the lock catch pin shaft (431), a moving contact arm (44) is arranged on one side of the handle (41), a moving contact point (441) is tightly welded to the outer wall of one end of the moving contact arm (44), a main spring (45) is arranged inside the moving contact arm (44), the main spring (45) is connected to the moving contact arm (44) near the moving contact point (441), one end of the main spring (45) is connected to the lock ring (42), an external wiring terminal (46) is arranged on the outer side of the moving contact arm (44), a static contact point (461) is tightly welded to the outer wall of the external wiring terminal (46) near the moving contact point (441), an armature (47) is arranged outside one side of the lock catch (43), an armature support wall (473) is tightly welded to one end of the armature (47), an armature pin shaft (471) is rotatably connected to the middle of the armature support wall (473), and an armature return spring (472) is installed on the armature pin shaft (471).

2. The trip structure of a circuit breaker according to claim 1, Characterized in that: The cover plate (2) is fixed on the housing (1) by rivets.

3. The trip structure of a circuit breaker according to claim 1, Characterized in that: Pin holes (31) are formed on the surface of the iron bracket (3) near the lock catch pin shaft (431) and the armature pin shaft (471), and the lock catch pin shaft (431) and the armature pin shaft (471) are rotatably connected to the pin holes (31).

4. The trip structure of a circuit breaker according to claim 1, Characterized in that: A lock ring shaft hole (32) is formed on the surface of the iron bracket (3).

5. The trip structure of a circuit breaker according to claim 1, Characterized in that: A handle pin (411) is rotatably connected to the middle of the handle (41), a handle pin hole (33) is formed on the surface of the iron bracket (3) near the handle pin (411), and the handle pin (411) is rotatably connected to the handle pin hole (33).

6. The trip structure of a circuit breaker according to claim 1, Characterized in that: On the upper part of one side of the handle (41) close to the locking ring (42), a chuck (412) is provided. When the outer end of the handle (41) rotates upward, the chuck (412) can press and hold the upper part of one side of the locking ring (42). A moving contact arm connecting shaft (413) is closely welded to the handle (41) near the moving contact arm (44), and the moving contact arm connecting shaft (413) is rotatably connected to one end of the moving contact arm (44).

7. The trip structure of the circuit breaker according to claim 1, characterized in that: The outer wall of one side of the iron bracket (3) is closely attached to the inner wall of the housing (1).

8. The trip structure of the circuit breaker according to claim 1, characterized in that: One end of the main spring (45) is connected to the moving contact arm (44) through a spring buckle (451), and the other end hooks the groove of the stress point (421).

9. The trip structure of the circuit breaker according to claim 1, characterized in that: A holding handle (414) is closely welded to the outer end of the handle (41).

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