Operating mechanism for residual-current circuit breaker
By using plastic limit latches and actuator handles in the operating mechanism of the residual current circuit breaker, and equipping it with a non-contact lubricating oil sensor to automatically add lubricating oil, the problems of plastic component wear and lubricating oil drying are solved, improving the accuracy and durability of the mechanism.
Patent Information
- Application Number
- CN202520387470.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-06
- Publication Date
- 2026-01-30
- Estimated Expiration
- 2035-03-06
AI Technical Summary
In the operating mechanism of existing residual current circuit breakers, the plastic parts are prone to wear, which leads to an extended reset path and affects the accuracy of the tripping function. At the same time, the lubricating oil dries out during use, which increases friction and wear, and the subsequent refilling procedure is cumbersome.
An operating mechanism including an actuation component and an oil injection component was designed. The actuation component reduces wear by using a limit buckle and the plastic material between the actuation handle, and automatically adds lubricating oil to maintain the lubrication effect by monitoring the amount of lubricating oil in real time through a non-contact lubricating oil sensor.
It effectively reduces wear on the limit latches and actuator handles, ensures a short and accurate reset path, achieves automatic lubrication replenishment, avoids wear and friction problems, and improves the durability and reliability of the mechanism.
Smart Images
Figure CN223858115U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the related technical field of circuit breaker, specifically for a kind of operating mechanism for leakage circuit breaker. BACKGROUND
[0002] The operating mechanism currently used is composed of copper or iron components and plastic components, and in the daily operation process, compared with the firmness and durability of metal parts, the plastic components are more prone to wear due to their material properties. This wear can lengthen the reset path and negatively affect the tripping function, resulting in reduced accuracy of action. Therefore, this design has obvious defects in durability and reliability, and needs to be further optimized to improve overall performance.
[0003] To ensure efficient and stable operation of the actuator and reduce wear of internal parts, lubricating oil needs to be applied inside the mechanism. This process significantly improves internal lubrication, effectively reducing wear rate. However, most actuators currently only have a one-time lubricating oil injection during manufacturing. As the use time increases, the lubricating oil may dry out, losing its original lubricating effectiveness, which can further exacerbate internal friction and wear. The process of re-injecting lubricating oil later is tedious.
[0004] Therefore, there is a need for an operating mechanism for leakage circuit breaker to improve the above problems. SUMMARY
[0005] To solve the problem that the operating mechanism of leakage circuit breaker is composed of copper or iron components and plastic components during use, and in the daily operation process, compared with the firmness and durability of metal parts, the plastic components are more prone to wear due to their material properties. This wear can lengthen the reset path and negatively affect the tripping function, the utility model provides an operating mechanism for leakage circuit breaker to solve the above problems.
[0006] To achieve the above purpose, the utility model provides the following technical scheme:
[0007] An operating mechanism for leakage circuit breaker, comprising a circuit breaker housing, an operating handle is installed on the outer wall of the circuit breaker housing, and an execution assembly is connected to one end of the operating handle. An oil injection assembly is installed on the outer wall of the circuit breaker housing, and a static contact is installed on the inner wall of the circuit breaker housing.
[0008] The execution assembly comprises a mounting bottom plate, which is mounted on the inner wall of the circuit breaker shell; a rotating rod is mounted on the outer wall of the mounting bottom plate; a limiting buckle is rotationally connected to the outer wall of the rotating rod; the limiting buckle is connected to the outer wall of the operating handle through a pulling rod; a rotating rod is mounted on the outer wall of the mounting bottom plate; an opening is formed in the port of the rotating rod; an execution handle is rotationally connected to the outer wall of the rotating rod; an oil outlet hole is formed in one side of the limiting buckle and located on the outer wall of the execution handle; the opening and the oil outlet hole are in communication; a thermal trip pulling rod is mounted on the outer wall of the execution handle, and one end of the thermal trip pulling rod is connected to the inner wall of the circuit breaker shell; and a moving contact is mounted on the outer wall of the execution handle.
[0009] As a preferred scheme of the utility model, the oil injection assembly comprises an oil storage shell and a mounting plate, the mounting plate is mounted at the port of the rotating rod, a non-contact lubricating oil sensor is mounted on the outer wall of the mounting plate, an oil outlet cylinder is embeddedly mounted on the outer wall of the mounting plate, and an oil pipe is mounted on the outer wall of the oil outlet cylinder.
[0010] As a preferred scheme of the utility model, the oil storage shell is mounted on the outer wall of the circuit breaker shell, a micro oil pump is mounted on the outer wall of the oil storage shell, a controller is mounted on the outer wall of the micro oil pump, and an oil pipe is connected to the oil outlet of the micro oil pump.
[0011] As a preferred scheme of the utility model, the circuit breaker shell is provided with an arc extinguishing chamber on the inner wall, is provided with a wiring terminal on the inner wall, is provided with an electromagnetic release on the inner wall, the execution handle is located on one side of the electromagnetic release, the rotating rod is located on one side of the rotating rod, and the limiting buckle and the execution handle are made of plastic material.
[0012] As a preferred scheme of the utility model, the controller is connected with the non-contact lubricating oil sensor and the micro oil pump through wires and is electrically connected.
[0013] As a preferred scheme of the utility model, the limiting buckle limits and fixes the execution handle, the non-contact lubricating oil sensor is located directly above the execution handle, and two groups of oil outlet holes are formed in the outer wall of the execution handle.
[0014] As a preferred scheme of the utility model, the oil outlet hole is located between the limiting buckle and the execution handle, the mounting plate is located directly above the mounting bottom plate, and the execution handle is located between the mounting plate and the mounting bottom plate.
[0015] As the preferred scheme of the utility model, the oil outlet cylinder is located at one side of the opening and the connection between the oil outlet cylinder and the opening is a communication structure, the oil inlet of the micro oil pump is connected on the outer wall of the oil storage shell through a conduit, and the outer wall of the execution handle is provided with a protrusion.
[0016] Compared with the prior art, the utility model discloses an execution assembly arranged in the operating mechanism for the residual-current circuit breaker, which can reduce the abrasion between the limiting buckle and the execution handle, apply lubricating oil between the limiting buckle and the execution handle, make the material of the limiting buckle and the execution handle plastic, reduce the abrasion between the limiting buckle and the execution handle, make the stroke of the execution handle shorter, and when the electromagnetic release operates magnetically due to short circuit, the protrusion of the execution handle is ejected by the electromagnetic release, so as to unlock the execution assembly, thereby solving the problem that part of the existing operating mechanism is made of copper or iron, another part is made of plastic material, the plastic material is easy to be abraded during use, the reset stroke is lengthened, and the tripping effect is affected.
[0017] The utility model discloses an injection assembly arranged in the operating mechanism for the residual-current circuit breaker, the non-contact lubricating oil sensor of the utility model discloses a real-time monitoring lubricating oil between the limiting buckle and the execution handle, and the non-contact lubricating oil sensor generates an electric signal and conducts to the controller through a wire, when reaching the set value, the micro oil pump extracts the lubricating oil in the oil storage shell, the lubricating oil flows to the limiting buckle and the execution handle through the opening, and then adds the lubricating oil, thereby solving the problem that most of the existing execution mechanisms are lubricated only once during the manufacturing stage, with the increase of the use time, the lubricating oil may be dry, loses the original lubricating efficiency, and then causes the friction and abrasion of the mechanism to aggravate, and the procedure of re-adding the lubricating oil is complicated. BRIEF DESCRIPTION OF DRAWINGS
[0018] Figure 1 It is the whole structure schematic diagram of the utility model;
[0019] Figure 2 It is the execution assembly structure schematic diagram of the utility model;
[0020] Figure 3 It is the front view structure schematic diagram of the utility model;
[0021] Figure 4 It is the A structure amplification schematic diagram of the utility model;
[0022] Figure 5 It is the injection assembly structure schematic diagram of the utility model.
[0023] In the figure: 1, circuit breaker housing; 2, operating handle; 3, execution assembly; 301, mounting bottom plate; 302, rotating rod; 303, limiting buckle; 304, pull rod; 305, rotating rod; 306, opening; 307, execution handle; 308, oil outlet hole; 309, thermal trip pull rod; 310, moving contact; 4, oil injection assembly; 401, oil storage shell; 402, mounting plate; 403, non-contact lubricating oil sensor; 404, oil outlet cylinder; 405, oil pipe; 406, micro oil pump; 407, controller; 5, static contact; 6, arc extinguishing chamber; 7, wiring terminal; 8, electromagnetic release. DETAILED DESCRIPTION
[0024] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.
[0025] Embodiment: Please refer to Figures 1-5 The operating mechanism for the residual current circuit breaker shown in the figure comprises a circuit breaker housing 1, an operating handle 2 is inlaid and mounted on the outer wall of the circuit breaker housing 1, one end of the operating handle 2 is connected with an execution assembly 3, an oil injection assembly 4 is mounted on the outer wall of the circuit breaker housing 1, and a static contact 5 is mounted on the inner wall of the circuit breaker housing 1.
[0026] In this embodiment, specific reference is made to Figure 1 , Figure 2 , Figure 3 and Figure 4The executing assembly 3 comprises a mounting base plate 301 mounted on the inner wall of the circuit breaker shell 1, a rotating rod 302 mounted on the outer wall of the mounting base plate 301, a limiting buckle 303 rotatably connected to the outer wall of the rotating rod 302, wherein the limiting buckle 303 is connected to the outer wall of the operating handle 2 through a pulling rod 304, a rotating rod 305 mounted on the outer wall of the mounting base plate 301, an opening 306 formed at the port of the rotating rod 305, an executing handle 307 rotatably connected to the outer wall of the rotating rod 305, and the executing handle 307 located between the mounting plate 402 and the mounting base plate 301, the limiting buckle 303 plays a limiting and fixing role on the executing handle 307, an oil outlet hole 308 is formed on one side of the limiting buckle 303 and located on the outer wall of the executing handle 307, the oil outlet hole 308 is formed in two groups and located on the outer wall of the executing handle 307, the oil outlet hole 308 is located between the limiting buckle 303 and the executing handle 307, and the opening 306 and the oil outlet hole 308 are in communication structure, a thermal trip pulling rod 309 is mounted on the outer wall of the executing handle 307, and one end of the thermal trip pulling rod 309 is connected to the inner wall of the circuit breaker shell 1, a moving contact 310 is mounted on the outer wall of the executing handle 307, and the moving contact 310 is located on one side of the stationary contact 5.
[0027] In this embodiment, specific reference is made to Figure 1 、 Figure 2 and Figure 5 The oil injection assembly 4 comprises an oil storage shell 401 and a mounting plate 402, the mounting plate 402 is mounted at the port of the rotating rod 305, the mounting plate 402 is located directly above the mounting base plate 301, a non-contact lubricating oil sensor 403 is mounted on the outer wall of the mounting plate 402, the non-contact lubricating oil sensor 403 is located directly above the executing handle 307, an oil outlet cylinder 404 is embeddedly mounted on the outer wall of the mounting plate 402, an oil pipe 405 is mounted on the outer wall of the oil outlet cylinder 404, the oil storage shell 401 is mounted on the outer wall of the circuit breaker shell 1, a micro oil pump 406 is mounted on the outer wall of the oil storage shell 401, the oil inlet of the micro oil pump 406 is connected to the outer wall of the oil storage shell 401 through a conduit, a controller 407 is mounted on the outer wall of the micro oil pump 406, and the oil outlet of the micro oil pump 406 is connected with the oil pipe 405.
[0028] Wherein, the inner wall of the circuit breaker shell 1 is provided with arc extinguishing chamber 6, the inner wall of the circuit breaker shell 1 is provided with wiring terminal 7, the inner wall of the circuit breaker shell 1 is provided with electromagnetic release 8, the execution handle 307 is located on one side of the electromagnetic release 8, the rotating rod 302 is located on one side of the rotating rod 305, the material of the limiting buckle 303 and the execution handle 307 is plastic material, the controller 407 is connected with non-contact lubricating oil sensor 403 and micro oil pump 406 through wires and the connection mode is electrically connected, so that the device is powered on, the oil outlet cylinder 404 is located on one side of the opening 306 and the connection between the oil outlet cylinder 404 and the opening 306 is a communication structure, the outer wall of the execution handle 307 is provided with a protrusion, so that the stroke of the execution handle 307 is shortened, which is convenient for resetting, and the inner cavity of the execution handle 307 is a hollow structure, which is convenient for the lubricating oil in the opening 306 in the rotating rod 305 to fill the inner cavity of the execution handle 307, so that the lubricating oil flows out through the oil outlet hole 308.
[0029] The operation mechanism of the present scheme for the leakage circuit breaker works, the outer wall of the rotating rod 302 is connected with the limiting buckle 303, the limiting buckle 303 is connected to the outer wall of the operating handle 2 through the pulling rod 304, the operating handle 2 is pulled, the operating handle 2 drives the limiting buckle 303 to move through the pulling rod 304, so that the limiting buckle 303 rotates on the outer wall of the rotating rod 302, the limiting buckle 303 moves to the appropriate position on the outer wall of the execution handle 307, so that the limiting buckle 303 clamps the execution handle 307 to fix, at the same time, the limiting buckle 303 and the execution handle 307 are made of plastic material, the limiting buckle 303 and the execution handle 307 are coated with lubricating oil, the wear between the limiting buckle 303 and the execution handle 307 is reduced, and the outer wall of the execution handle 307 is provided with a protrusion, so that the stroke of the execution handle 307 is short, when the electromagnetic release 8 generates magnetic operation in short circuit, the protrusion of the execution handle 307 is ejected, so as to unlock the execution assembly 3, thereby solving the problem that part of the existing operation mechanism is made of copper or iron, and the other part is made of plastic material, the plastic part is easy to be worn in the use process, resulting in the lengthening of the resetting distance, thereby affecting the release effect and the inaccuracy.
[0030] The non-contact lubricating oil sensor 403 is installed on the outer wall of the mounting plate 402 and is located directly above the operating handle 307, and when the lubricating oil between the limiting buckle 303 and the operating handle 307 changes, the non-contact lubricating oil sensor 403 monitors the lubricating oil between the limiting buckle 303 and the operating handle 307 in real time, and at the same time, the non-contact lubricating oil sensor 403 generates an electrical signal which is conducted to the controller 407 through a wire, and when the set value is reached, the controller 407 controls the operation of the micro oil pump 406, the micro oil pump 406 operates to pump out the lubricating oil in the oil storage shell 401, and then the lubricating oil is injected into the oil outlet cylinder 404 through the oil pipe 405, the oil outlet hole 308 is opened on the outer wall of the operating handle 307 and is located between the limiting buckle 303 and the operating handle 307, the oil outlet cylinder 404 is located on one side of the opening 306, and the connection between the oil outlet cylinder 404 and the opening 306 is a communication structure, the opening 306 is opened at the port of the rotating rod 305, the operating handle 307 is rotatably connected to the outer wall of the rotating rod 305, the oil outlet hole 308 is opened on one side of the limiting buckle 303 and is located on the outer wall of the operating handle 307, and the opening 306 and the oil outlet hole 308 are in communication, the lubricating oil in the oil outlet cylinder 404 is injected into the opening 306 through the oil outlet hole 308, the lubricating oil flows between the limiting buckle 303 and the operating handle 307 through the opening 306, and then the lubricating oil is added, thereby solving the problem that most of the current actuating mechanisms only add lubricating oil once during the manufacturing stage, as the use time increases, the lubricating oil may dry up, lose its original lubricating efficiency, and then cause the friction and wear of the mechanism to increase, and the process of re-adding lubricating oil is complicated.
[0031] Although the embodiments of the present application have been shown and described, it should be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.
Claims
1. An operating mechanism for an electric leakage circuit breaker comprising a circuit breaker housing (1), characterized in that: The operating handle (2) is inlaid on the outer wall of the circuit breaker shell (1), and one end of the operating handle (2) is connected with an execution assembly (3); an oil injection assembly (4) is arranged on the outer wall of the circuit breaker shell (1); and a static contact (5) is arranged on the inner wall of the circuit breaker shell (1). The execution assembly (3) comprises a mounting base plate (301) arranged on the inner wall of the circuit breaker shell (1), a rotating rod (302) arranged on the outer wall of the mounting base plate (301), a limiting buckle (303) rotatably connected to the outer wall of the rotating rod (302), wherein the limiting buckle (303) is connected to the outer wall of the operating handle (2) through a pulling rod (304), a rotating rod (305) arranged on the outer wall of the mounting base plate (301), an opening (306) formed in the port of the rotating rod (305), an execution handle (307) rotatably connected to the outer wall of the rotating rod (305), an oil outlet hole (308) formed in the outer wall of the execution handle (307) and located on the side of the limiting buckle (303) and the outer wall of the execution handle (307), wherein the opening (306) and the oil outlet hole (308) are in communication, a thermal release pulling rod (309) arranged on the outer wall of the execution handle (307), wherein one end of the thermal release pulling rod (309) is connected to the inner wall of the circuit breaker shell (1), and a moving contact (310) arranged on the outer wall of the execution handle (307).
2. An operating mechanism for an arc fault circuit interrupter according to claim 1, wherein: The oil injection assembly (4) comprises an oil storage shell (401) and a mounting plate (402), the mounting plate (402) is arranged at the port of the rotating rod (305), a non-contact lubricating oil sensor (403) is arranged on the outer wall of the mounting plate (402), and an oil outlet cylinder (404) is inlaid on the outer wall of the mounting plate (402), wherein an oil pipe (405) is arranged on the outer wall of the oil outlet cylinder (404).
3. An operating mechanism for an arc fault circuit interrupter according to claim 2, wherein: The oil storage shell (401) is arranged on the outer wall of the circuit breaker shell (1), a micro oil pump (406) is arranged on the outer wall of the oil storage shell (401), a controller (407) is arranged on the outer wall of the micro oil pump (406), and the oil outlet of the micro oil pump (406) is connected with the oil pipe (405).
4. An operating mechanism for an arc fault circuit interrupter according to claim 1, wherein: An arc extinguishing chamber (6) is arranged on the inner wall of the circuit breaker shell (1), a wiring terminal (7) is arranged on the inner wall of the circuit breaker shell (1), an electromagnetic release (8) is arranged on the inner wall of the circuit breaker shell (1), the execution handle (307) is located on the side of the electromagnetic release (8), the rotating rod (302) is located on the side of the rotating rod (305), the limiting buckle (303) and the execution handle (307) are made of plastic material, and a protrusion is arranged on the outer wall of the execution handle (307).
5. An operating mechanism for an arc fault circuit interrupter according to claim 3 wherein: The controller (407) is connected with the non-contact lubricating oil sensor (403) and the micro oil pump (406) through wires in an electrical connection manner, and the moving contact (310) is located on the side of the static contact (5).
6. An operating mechanism for an arc fault circuit interrupter according to claim 2, wherein: The limiting buckle (303) plays a limiting fixing role on the execution handle (307), the non-contact lubricating oil sensor (403) is located directly above the execution handle (307), and the oil outlet hole (308) is provided with two groups and is located on the outer wall of the execution handle (307).
7. An operating mechanism for an arc fault circuit interrupter according to claim 2 wherein: The oil outlet hole (308) is located between the limiting buckle (303) and the execution handle (307), the mounting plate (402) is located directly above the mounting bottom plate (301), and the execution handle (307) is located between the mounting plate (402) and the mounting bottom plate (301).
8. An operating mechanism for an arc fault circuit interrupter according to claim 3 wherein: The oil outlet cylinder (404) is located on one side of the opening (306), and the connection between the oil outlet cylinder (404) and the opening (306) is a communication structure, the oil inlet of the micro oil pump (406) is connected on the outer wall of the oil storage shell (401) through a conduit, and the outer wall of the execution handle (307) is provided with a protrusion.