Circuit breaker with anti-misoperation structure

Abstract

The utility model discloses a circuit breaker with an anti-misoperation structure, which comprises a circuit breaker body, an opening and closing handle is arranged on the circuit breaker body, a protection frame is arranged on one side of the circuit breaker body, a rotating shaft is arranged in the protection frame, a gear and a rotating seat are fixed on the rotating shaft, a shifting groove is arranged on the rotating seat, and the shifting groove is arranged on the circuit breaker body. The opening and closing handle is clamped in the shifting groove, the protective frame is provided with a rack below the gear, the upper end of the rack is meshed with the gear, the rack is in sliding connection with the protective frame, and a threaded hole is formed in the side wall of the protective frame; the device further comprises a limiting screw in threaded connection with the threaded hole, the inner end of the limiting screw abuts against the end of the rack, a driving groove is formed in the end face of the outward end of the limiting screw, a specific tool is matched with the driving groove to drive the limiting screw to rotate, and therefore the rack is locked. The step that the limiting screw rod is aligned with the fixing hole and penetrates through the fixing hole is omitted, and operation is more convenient and saves more labor.

Description

Technical Field

[0001] The utility model relates to the technical field of circuit breakers, in particular to a circuit breaker with an anti-misoperation structure. Background Art

[0002] Plastic case circuit breakers can automatically cut off the current after the current exceeds the tripping setting. The plastic case circuit breaker includes a shell made of plastic insulator and a control component arranged inside the shell. Plastic case circuit breakers usually include two functions: overload delay protection and short circuit instantaneous protection. Overload delay protection is to deform the double metal strip through thermal conduction. When the circuit breaker is overloaded, overheating is generated to cause the double metal strip to bend and deform, thereby triggering the rotation of the traction rod to achieve tripping. This tripping mechanism is usually provided with an inclined adjustment rod on the traction rod. The lateral position of the adjustment rod is adjusted by a knob, thereby adjusting the distance between the inclined surface and the adjusting screw on the bimetallic strip. Short circuit instantaneous protection is that when a short circuit occurs, the sudden increase in current causes the moving iron core and the static iron core on the traction rod to separate, thereby disconnecting the circuit.

[0003] As a prior art, China's CN206497863U proposes a plastic-enclosed circuit breaker that prevents misoperation, which effectively prevents others from operating it incorrectly. However, in this technical solution, multiple fixing holes are arranged in a ring, and each time the screw needs to be aligned with the fixing hole and passed through it, which is cumbersome and laborious to operate. Moreover, the long-term use of the gears and their contact with moisture in the air can easily accelerate the aging and rusting of the gears, which may affect the normal opening and closing of the switch. Utility Model Content

[0004] The utility model aims to provide a circuit breaker with an anti-misoperation structure to solve the problems raised in the above background technology.

[0005] In order to solve the above technical problems, the utility model adopts the following technical scheme: a circuit breaker with an anti-misoperation structure, comprising a circuit breaker body, an opening and closing handle on the circuit breaker body, a protection frame on one side of the circuit breaker body, a rotating shaft inside the protection frame, a gear and a rotating seat fixed on the rotating shaft, a pull groove on the rotating seat, the opening and closing handle is clamped in the pull groove, the protection frame is provided with a rack below the gear, the upper end of the rack is meshed with the gear, the rack is slidably connected to the protection frame, and a threaded hole is provided on the side wall of the protection frame; and also includes a limiting screw threadedly connected to the threaded hole, the inner end of the limiting screw abuts against the end of the rack, and a driving groove is provided on the end surface facing the outer end.

[0006] By adopting the above technical solution, turning the rotating seat will drive the opening and closing handle to rotate, thereby realizing the opening and closing of the circuit breaker body, and at the same time drive the gear to rotate, thereby driving the rack to slide in the protective frame. When the circuit breaker body is closed, the rack slides to one side of the protective frame. The driving groove on the outward end face of the limit screw is set to a specific shape, and a specific tool is used to cooperate with the driving groove to drive the limit screw to rotate. The limit screw moves inward through the thread and abuts against the end of the rack, thereby locking the rack. At this time, the outer end of the limit screw is located in the threaded hole, and it can only be screwed outward by cooperating with a specific tool and the driving groove, thereby avoiding misoperation by others. Compared with the prior art, the step of aligning the limit screw with the fixing hole and passing it through is eliminated, and the operation is more convenient and labor-saving.

[0007] As a further optimization of the utility model, an oil filling device is provided in the protective frame, and the oil filling device includes an oil box fixed to the side wall of the protective frame, an oil filling hole is provided on the top of the oil box, a cavity is opened in the oil box, a ball and a spring are arranged in the cavity, a through hole is opened at the bottom of the cavity, the ball is tightly attached to the inner wall of the through hole through elasticity and partially extends out of the through hole, and the part of the ball extending out of the through hole abuts against the rack.

[0008] By adopting the above technical solution, when the rack slides, it contacts the ball during the sliding process, thereby driving the ball to rotate. After the ball rotates, the side with oil contacts the rack, so that the surface of the rack is attached with oil. The rack then transfers the oil to the gear, so that the surfaces of the gear and the rack are both attached with oil, which slows down the oxidation and rusting of both and avoids affecting the normal opening and closing of the switch.

[0009] As a further optimization of the utility model, the cross section of the oil filling hole is in a conical shape that is larger at the top and smaller at the bottom.

[0010] By adopting the above technical solution, the conical oil filling hole can prevent the oil from flowing back after passing through.

[0011] As a further optimization of the utility model, two oil injection devices are provided and are respectively arranged on both sides of the gear.

[0012] By adopting the above technical solution, two oil injection devices are provided so that the gear and the rack can adhere to the oil more evenly.

[0013] The beneficial effects of the utility model are as follows: turning the rotating seat will drive the opening and closing handle to rotate, thereby realizing the opening and closing of the circuit breaker body, and at the same time drive the gear to rotate, thereby driving the rack to slide in the protection frame. When the circuit breaker body is closed, the rack slides to one side of the protection frame. The driving groove on the outward end face of the limit screw is set to a specific shape, and a specific tool is used to cooperate with the driving groove to drive the limit screw to rotate. The limit screw is displaced inwardly through the thread and abuts against the end of the rack, thereby locking the rack. At this time, the outer end of the limit screw is located in the threaded hole and can only be screwed outward by cooperating with a specific tool and the driving groove. Compared with the prior art, the step of aligning the limit screw with the fixing hole and passing it through is eliminated, and the operation is more convenient and labor-saving. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the structure of the utility model;

[0015] Figure 2 It is a schematic cross-sectional structure diagram of the protection frame in the utility model;

[0016] Figure 3 It is a schematic diagram of the partial structure of the limiting screw in the utility model.

[0017] The meaning of the numbers in the figure are as follows: 1. Circuit breaker body; 11. Opening and closing handle; 12. Protection frame; 13. Rotating shaft; 14. Gear; 15. Rotating seat; 2. Rack; 21. Slider; 3. Limiting screw; 31. Driving groove; 4. Oil box; 41. Oil filling hole; 42. Spring; 43. Ball; 44. Through hole; 5. Threaded hole; 6. Slide groove. DETAILED DESCRIPTION

[0018] This specific embodiment is merely an explanation of the present invention and is not a limitation of the present invention. After reading this specification, those skilled in the art may make non-creative modifications to the present embodiment as needed, but such modifications are protected by patent law as long as they are within the scope of the claims of the present invention.

[0019] See attached Figure 1-3 The embodiment disclosed in the utility model further provides: a circuit breaker with an anti-misoperation structure, comprising a circuit breaker body 1, the circuit breaker body 1 having an opening and closing handle 11, a protection frame 12 being provided on one side of the circuit breaker body 1, a rotating shaft 13 being provided in the protection frame 12, a gear 14 and a rotating seat 15 being fixed on the rotating shaft 13, a pull groove being provided on the rotating seat 15, and the opening and closing handle 11 being clamped in the pull groove;

[0020] The protection frame 12 is provided with a rack 2 below the gear 14, the upper end of the rack 2 is meshed with the gear 14, the rack 2 is slidably connected to the protection frame 12, the inner wall of the protection frame 12 is provided with a slide groove 6, and slide blocks 21 are provided on both sides of the rack (2), and the slide blocks 21 are slidably connected to the slide groove 6;

[0021] Specifically, a threaded hole 5 is formed on the side wall of the protection frame 12; a limiting screw 3 is also formed which is threadedly connected to the threaded hole 5, the inner end of the limiting screw 3 abuts against the end of the rack 2, and a driving groove 31 is formed on the end surface facing the outer end. Specifically, in this embodiment, the shape of the driving groove 31 is set to be a specific octagon;

[0022] An oil injection device is provided in the protection frame 12. Two oil injection devices are provided and are respectively provided on both sides of the gear 14. The two oil injection devices are provided so that the gear 14 and the rack 2 can adhere to the oil more evenly.

[0023] Specifically, the oil filling device includes an oil box 4 fixed to the side wall of the protection frame 12, an oil filling hole 41 is provided on the top of the oil box 4, and further, the cross section of the oil filling hole 41 is a cone with a larger top and a smaller bottom, and the conical oil filling hole 41 can prevent the oil from flowing back after passing through, and the oil box 4 is provided with a cavity, and a ball 43 and a spring 42 are provided in the cavity, and a through hole 44 is provided at the bottom of the cavity, and the ball 43 is tightly attached to the inner wall of the through hole 44 through elasticity and partially extends out of the through hole 44, and the part of the ball 43 extending out of the through hole 44 abuts against the rack 2;

[0024] The principle of the utility model is as follows: turning the rotary seat 15 will drive the opening and closing handle 11 to rotate, thereby realizing the opening and closing of the circuit breaker body 1, and at the same time drive the gear 14 to rotate, thereby driving the rack 2 to slide in the protection frame 12. When the circuit breaker body 1 is closed, the rack 2 slides to one side of the protection frame 12. The driving groove 31 on the outward end face of the limiting screw 3 is set to a specific shape. A specific tool (the end face shape is a specific octagon) is used to cooperate with the driving groove 31 to drive the limiting screw 3 to rotate. The limiting screw 3 moves inward through the thread and abuts against the end of the rack 2, thereby locking the rack 2. At this time, the outer end of the limiting screw 3 is located in the threaded hole 5, and it can only be screwed outward by a specific tool and the driving groove 31, thereby avoiding misoperation by others. Compared with the prior art, the step of aligning the limiting screw 3 with the fixing hole and passing it through is eliminated, and the operation is more convenient and labor-saving.

[0025] When the rack 2 slides, it contacts the ball 43, thereby driving the ball 43 to rotate. After the ball 43 rotates, the side with oil contacts the rack 2, so that the surface of the rack 2 is attached with oil. The rack 2 then transfers the oil to the gear 14, so that the surfaces of the gear 14 and the rack 2 are both attached with oil, which slows down the oxidation and rusting of the two and avoids affecting the normal opening and closing of the switch.

[0026] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications of the above assumptions should also be regarded as the protection scope of the present invention.

Claims

1. A circuit breaker with an anti-misoperation structure, comprising a circuit breaker body (1), the circuit breaker body (1) having an opening and closing handle (11), a protection frame (12) being provided on one side of the circuit breaker body (1), a rotating shaft (13) being provided in the protection frame (12), a gear (14) and a rotating seat (15) being fixed on the rotating shaft (13), a shifting groove being provided on the rotating seat (15), the opening and closing handle (11) being clamped in the shifting groove, and characterized in that: The protection frame (12) is provided with a rack (2) below the gear (14), the upper end of the rack (2) is meshed with the gear (14), the rack (2) is slidably connected to the protection frame (12), and a threaded hole (5) is provided on the side wall of the protection frame (12); the protection frame (12) also includes a limit screw (3) threadedly connected to the threaded hole (5), the inner end of the limit screw (3) is in contact with the end of the rack (2), and a driving groove (31) is provided on the end surface facing the outer end.

2. A circuit breaker with an anti-misoperation structure according to claim 1, characterized in that: An oil injection device is provided in the protection frame (12), and the oil injection device comprises an oil box (4) fixed to the inner wall of the protection frame (12); an oil injection hole (41) is provided at the top of the oil box (4); a cavity is provided in the oil box (4); a ball (43) and a spring (42) are provided in the cavity; a through hole (44) is provided at the bottom of the cavity; the ball (43) is tightly attached to the inner wall of the through hole (44) through elasticity and partially extends out of the through hole (44); the part of the ball (43) extending out of the through hole (44) abuts against the rack (2).

3. A circuit breaker with an anti-misoperation structure according to claim 1, characterized in that: The inner wall of the protection frame (12) is provided with a slide groove (6), and sliding blocks (21) are provided on both sides of the rack (2), and the sliding blocks (21) are slidably connected to the slide groove (6).

4. A circuit breaker with an anti-misoperation structure according to claim 2, characterized in that: The cross section of the oil injection hole (41) is in the shape of a cone that is larger at the top and smaller at the bottom.

5. A circuit breaker with an anti-misoperation structure according to claim 2 or 4, characterized in that: The oil injection devices are provided with two and are respectively arranged on both sides of the gear (14).

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