Plug-in circuit breaker

Abstract

The utility model relates to the field of circuit breakers, in particular to a plug-in circuit breaker. The circuit breaker comprises a circuit breaker body. Two guide assemblies are symmetrically arranged on the circuit breaker body, a mounting rod and a connecting rod are arranged between the two guide assemblies, a switch handle is rotationally connected to the mounting rod, two limiting assemblies are symmetrically arranged on the switch handle, a connecting rod is arranged between the two limiting assemblies, each limiting assembly comprises a ratchet wheel, and the ratchet wheels are fixedly arranged on the connecting rod. The ratchet wheels are meshed with the pawl, the pawl is provided with a bolt, the pawl is fixedly connected with the switch handle through the bolt, the pawl is fixedly connected with one end of the spring, the other end of the spring is fixedly connected with the pressing plate, the pressing plate is fixedly connected with the switch handle, ratchet directions of the two ratchet wheels are opposite, and a control rod is arranged at the pawl end; by arranging a self-locking mechanism of double ratchet wheels and pawls, the problem that a switch of an existing plug-in circuit breaker is easily touched by mistake can be effectively solved.

Description

Technical Field

[0001] The utility model relates to the technical field of circuit breakers, in particular to a plug-in circuit breaker. Background Art

[0002] A plug-in circuit breaker is a low-voltage electrical appliance installed in a distribution board, switch cabinet or complete distribution device. It is used to connect and disconnect load circuits, and to cut off the power supply through protective electrical appliances when the line is overloaded, short-circuited or undervoltage occurs, thus playing a control and protection role. The main structure of a plug-in circuit breaker includes an operating mechanism, a contact system, an arc extinguishing device, a trip device and a housing. Its contact system includes a moving contact and a static contact, which are in contact in the closed state and carry current; they are separated in the open state and interrupt the current. The arc extinguishing device is used to quickly extinguish the arc when the circuit breaker is disconnected to prevent the arc from causing damage to equipment and personnel.

[0003] In the field of communications, plug-in circuit breakers are often required to be densely inserted in a row due to their easy installation advantages. However, during the insertion and removal operations, there is a risk of accidentally touching the switches of adjacent circuit breakers due to the close arrangement of the circuit breakers, which may not only lead to equipment operation errors, but also pose a potential threat to system stability and even equipment safety. Therefore, we need to pay special attention and take measures to reduce this risk of accidental touching and ensure the stable operation of communication equipment.

[0004] Therefore, there is an urgent need to provide a plug-in circuit breaker to solve the above problems. Utility Model Content

[0005] The utility model aims to provide a plug-in circuit breaker to solve the problem of easy accidental switch contact of the existing plug-in circuit breaker mentioned in the background art.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solution: a plug-in circuit breaker, including a circuit breaker body.

[0007] In order to solve the problem that the existing plug-in circuit breaker is easy to touch the switch by mistake, two guide assemblies are symmetrically arranged on the circuit breaker body, a mounting rod and a connecting rod are arranged between the two guide assemblies, a switch handle is rotatably connected to the mounting rod, two limit assemblies are symmetrically arranged on the switch handle, a connecting rod is arranged between the two limit assemblies, the limit assembly includes a ratchet, the ratchet is fixedly mounted on the connecting rod, the ratchet is meshed with a pawl, a bolt is arranged on the pawl, the pawl is fixedly connected to the switch handle through the bolt, the pawl is fixedly connected to one end of the spring, the other end of the spring is fixedly connected to the pressure plate, the pressure plate is fixedly connected to the switch handle, the ratchet teeth of the two ratchets are in opposite directions, and a control rod is arranged at the end of the pawl. By setting a self-locking mechanism of the double ratchet and the pawl, it is beneficial to keep the fixed position when the circuit breaker switch handle is not operated by external force, prevent the circuit breaker from malfunctioning due to the accidental touch of the switch, and thus effectively solve the problem that the existing plug-in circuit breaker is easy to touch the switch by mistake.

[0008] As a further improvement of the present technical solution, the guide assembly includes a mounting plate, a guide groove is provided on the mounting plate, a plurality of tooth grooves are provided on the inner wall of the guide groove, the tooth groove is meshed with a gear, the gear is fixedly connected to the end of the connecting rod, and the connecting rod is rotatably connected to the switch handle; the meshing design of the gear and the guide groove is beneficial to the movement of the connecting rod and the ratchet wheel through the rotation of the gear during the process of turning the switch handle, thereby realizing precise limiting of the switch handle and avoiding abnormal operation of the circuit breaker due to improper operation.

[0009] As a further improvement of the present technical solution, the guide groove is arranged in an arc-shaped structure.

[0010] As a further improvement of the technical solution, the control rod is designed as a U-shaped structure, one end of the control rod is fixedly connected to the pawl, and the other end extends to the grip of the switch handle.

[0011] Compared with the prior art, the utility model has the following beneficial effects:

[0012] 1. A plug-in circuit breaker is provided with a self-locking mechanism of double ratchets and pawls, which is conducive to keeping the switch handle of the circuit breaker in a fixed position when the switch handle is not operated by external force, thereby preventing the circuit breaker from malfunctioning due to accidental touching of the switch.

[0013] 2. A plug-in circuit breaker uses a control lever to unlock the self-locking effect of the double ratchet, so that when the circuit breaker needs to be operated, the self-locking can be released through a simple operation (such as pulling the control lever), so that the switch handle can be smoothly moved to the specified position; the switch handle can be moved up and down through the selective operation of the control lever, which is convenient for users to flexibly control the switch state of the circuit breaker according to actual needs, while ensuring safety during operation.

[0014] 3. This plug-in circuit breaker utilizes the meshing design of the gear and the guide groove, which is beneficial to the movement of the connecting rod and the ratchet wheel through the rotation of the gear during the process of turning the switch handle, thereby realizing the precise limit of the switch handle and avoiding the abnormal operation of the circuit breaker due to improper operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0016] Figure 2 This is a schematic diagram of the switch handle structure of the utility model;

[0017] Figure 3 This is a cross-sectional view of the switch handle structure of the utility model;

[0018] Figure 4 It is a schematic diagram of the ratchet structure of the utility model.

[0019] The meaning of each number in the figure is:

[0020] 1. Circuit breaker body; 2. Switch handle; 3. Guide assembly; 4. Limit assembly; 5. Connecting rod; 6. Mounting rod;

[0021] 31. mounting plate; 32. guide groove; 33. tooth groove; 34. gear;

[0022] 41. Ratchet; 42. Pawl; 43. Bolt; 44. Spring; 45. Pressure plate; 46. Control lever. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0025] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "multiple" or "several" is two or more, unless otherwise clearly and specifically defined.

[0026] See also Figure 1 As shown, the purpose of this embodiment is to provide a plug-in circuit breaker, including a circuit breaker body 1.

[0027] For further information, see Figure 2-Figure 4 As shown, two guide assemblies 3 are symmetrically arranged on the circuit breaker body 1, a mounting rod 6 and a connecting rod 5 are arranged between the two guide assemblies 3, a switch handle 2 is rotatably connected to the mounting rod 6, two limit assemblies 4 are symmetrically arranged on the switch handle 2, a connecting rod 5 is arranged between the two limit assemblies 4, the limit assembly 4 includes a ratchet 41, the ratchet 41 is fixedly mounted on the connecting rod 5, the ratchet 41 is meshed with a pawl 42, a bolt 43 is arranged on the pawl 42, the pawl 42 is fixedly connected to the switch handle 2 through the bolt 43, and the pawl 42 is connected to the One end of the spring 44 is fixedly connected, and the other end of the spring 44 is fixedly connected to the pressure plate 45, and the pressure plate 45 is fixedly connected to the switch handle 2. The ratchet teeth of the two ratchets 41 are in opposite directions, and a control rod 46 is provided at the end of the pawl 42. When in use, after the circuit breaker body 1 is inserted into the specified position, the switch handle 2 is started to be pulled. When pulling it up, the control rod 46 on the left is pulled first, and then the self-locking effect of the double ratchet wheels 41 and the pawl 42 will be unlocked. Because the ratchet teeth of the double ratchet wheels 41 are in opposite directions, a self-locking effect will be generated under the limiting action of the pawl 42.

[0028] For further information, see Figure 2-Figure 4As shown, the guide assembly 3 includes a mounting plate 31, a guide groove 32 is provided on the mounting plate 31, a plurality of tooth grooves 33 are provided on the inner wall of the guide groove 32, the tooth grooves 33 are meshed with gears 34, the gears 34 are fixedly connected to the end of the connecting rod 5, and the connecting rod 5 is rotatably connected to the switch handle 2; this will drive the connecting rod 5 on the switch handle 2 to move along the guide groove 32, and then drive the gear 34 on the connecting rod 5 to move along the guide groove 32. Since the inner wall of the guide groove 32 is provided with a tooth groove 33 meshed with the gear 34, when the connecting rod 5 drives the gear 34 to move During the process, the gear 34 will rotate, and the rotation of the gear 34 will drive the connecting rod 5 to rotate, thereby causing the ratchet wheels 41 at both ends of the connecting rod 5 to rotate. The right ratchet wheel 41 can only rotate counterclockwise, and the left ratchet wheel 41 can only rotate clockwise, so that a self-locking effect will be generated, and the left control rod 46 will be pulled to release the pawl 42 of the left ratchet wheel 41, so that both ratchet wheels 41 can rotate counterclockwise, and then the switch handle 2 can be moved upward. After the switch handle 2 is moved to the specified position, the control rod 46 is released, and the self-locking effect is restored, thereby realizing the limit position of the switch.

[0029] For details, please refer to Figure 2-Figure 4 As shown, the guide groove 32 is arranged in an arc shape.

[0030] Also, see Figure 2-Figure 4 As shown, the control rod 46 is designed as a U-shaped structure, one end of the control rod 46 is fixedly connected to the pawl 42, and the other end extends to the grip of the switch handle 2.

[0031] The specific working principle is as follows:

[0032] When in use, after inserting the circuit breaker body 1 to the specified position, start to pull the switch handle 2. When pulling it upward, first pull the control rod 46 on the left, which will unlock the self-locking effect of the double ratchet 41 and the pawl 42. Because the ratchet teeth of the double ratchet 41 are in opposite directions, under the limiting action of the pawl 42, a self-locking effect will be generated; then the connecting rod 5 on the switch handle 2 will be driven to move along the guide groove 32, and then the gear 34 on the connecting rod 5 will be driven to move along the guide groove 32. Since the inner wall of the guide groove 32 is provided with a tooth groove 33 that meshes with the gear 34, the gear 34 will rotate in the process of the connecting rod 5 driving the gear 34 to move, and the rotation of the gear 34 drives the connecting rod 5 to rotate, and the The ratchets 41 at both ends of the connecting rod 5 are rotated, the right ratchet 41 can only rotate counterclockwise, and the left ratchet 41 can only rotate clockwise, so a self-locking effect is generated, and the left control rod 46 is pulled, thereby releasing the pawl 42 of the left ratchet 41, so that both ratchet wheels 41 can rotate counterclockwise, and then the switch handle 2 can be pulled upward, and after the switch handle 2 is pulled to the specified position, the control rod 46 is released, that is, the self-locking effect is restored, and the switch is limited. When the switch handle is pulled downward, the right control rod 46 is pulled to achieve the downward pull; finally, the limit protection of the switch handle 2 is achieved, thereby effectively solving the problem that the existing plug-in circuit breaker is easy to accidentally touch the switch.

[0033] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the utility model and are not used to limit the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection of the utility model is defined by the attached claims and their equivalents.

Claims

1. A plug-in circuit breaker, comprising a circuit breaker body (1); characterized in that: Two guide assemblies (3) are symmetrically arranged on the circuit breaker body (1); a mounting rod (6) and a connecting rod (5) are arranged between the two guide assemblies (3); a switch handle (2) is rotatably connected to the mounting rod (6); two limit assemblies (4) are symmetrically arranged on the switch handle (2); a connecting rod (5) is arranged between the two limit assemblies (4); the limit assemblies (4) include a ratchet (41); the ratchet (41) is fixedly mounted on the connecting rod (5); the ratchet (41) The pawl (41) is meshed with a ratchet (42), a bolt (43) is provided on the ratchet (42), the ratchet (42) is fixedly connected to the switch handle (2) via the bolt (43), the ratchet (42) is fixedly connected to one end of a spring (44), the other end of the spring (44) is fixedly connected to a pressure plate (45), the pressure plate (45) is fixedly connected to the switch handle (2), the ratchet teeth of the two ratchet wheels (41) are in opposite directions, and a control rod (46) is provided at the end of the ratchet (42).

2. A plug-in circuit breaker according to claim 1, characterized in that: The guide assembly (3) comprises a mounting plate (31), the mounting plate (31) being provided with a guide groove (32), the inner wall of the guide groove (32) being provided with a plurality of tooth grooves (33), the tooth grooves (33) being meshed with a gear (34), the gear (34) being fixedly connected to the end of the connecting rod (5), and the connecting rod (5) being rotatably connected to the switch handle (2).

3. A plug-in circuit breaker according to claim 2, characterized in that: The guide groove (32) is arranged in an arc-shaped structure.

4. A plug-in circuit breaker according to claim 1, characterized in that: The control rod (46) is designed as a U-shaped structure, one end of the control rod (46) is fixedly connected to the pawl (42), and the other end extends to the gripping position of the switch handle (2).

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