Auxiliary mechanism and circuit breaker

Abstract

An auxiliary mechanism. The auxiliary mechanism (13) is applied to a circuit breaker (1), and the circuit breaker comprises a circuit breaker body (11) and a main shaft (12) which are connected to each other. The auxiliary mechanism comprises a mounting frame (131), pressing members (132), and limiting members (133). The mounting frame is mounted on the circuit breaker body, the pressing members are mounted on the mounting frame and abut against the main shaft so as to prevent the main shaft from deforming in a direction away from the circuit breaker body, the limiting members are mounted on the mounting frame and connected to the pressing members, and the limiting members are used for limiting the pressing members when the pressing members abut against the main shaft. The limiting members are capable of providing support for the pressing members when the pressing members abut against the main shaft, to prevent the pressing members from being reversely pushed by the main shaft and shifting in a direction away from the circuit breaker body, so that the pressing members can effectively abut against the main shaft.

Description

Auxiliary mechanism and circuit breaker This application claims priority to the Chinese patent application filed with the State Intellectual Property Office on February 2, 2024, with application number 2024202725279 and application name “A Auxiliary Mechanism and Circuit Breaker”, the entire contents of which are incorporated by reference into this application. Technical Field

[0001] The present application relates to the technical field of power distribution equipment, and in particular to an auxiliary mechanism and a circuit breaker. Background Art

[0002] A frame circuit breaker consists of a circuit breaker body and an operating mechanism. The circuit breaker body houses a contact mechanism. The operating mechanism is mounted outside the circuit breaker body and connected to the contact mechanism inside the circuit breaker body via a main shaft, which controls the contact mechanism's connection and disconnection. When the operating mechanism controls the contact mechanism via the main shaft, the main shaft is prone to deformation, which can affect control of the contact mechanism.

[0003] Based on this, the prior art sets up an auxiliary mechanism to limit the spindle to reduce the deformation of the spindle. However, the existing auxiliary mechanism may be pushed back by the spindle during the process of limiting the spindle, and cannot effectively limit the spindle.

[0004] In view of this, an embodiment of the present application provides an auxiliary mechanism and a circuit breaker, which can effectively limit the main shaft and reduce the deformation of the main shaft.

[0005] In a first aspect, embodiments of the present application provide an auxiliary mechanism. This auxiliary mechanism is applied to a circuit breaker, which includes a connected circuit breaker body and a main shaft. The auxiliary mechanism includes a mounting bracket, a clamping member, and a limiting member. The mounting bracket is mounted to the circuit breaker body. The clamping member is mounted to the mounting bracket and abuts the main shaft; the clamping member is used to prevent the main shaft from deforming away from the circuit breaker body. The limiting member is mounted to the mounting bracket and connected to the clamping member; the limiting member is used to limit the position of the clamping member when it abuts the main shaft.

[0006] Taking into account the technical problem that the auxiliary mechanism of the prior art cannot effectively limit the main shaft, the embodiment of the present application provides a clamping member and a limiting member so that the clamping member can push the main shaft to prevent the main shaft from deforming in the direction away from the circuit breaker body. The limiting member can provide support for the clamping member when the clamping member pushes the main shaft to prevent the clamping member from being pushed in the opposite direction by the main shaft and deviating in the direction away from the circuit breaker body, so that the clamping member can effectively push the main shaft.

[0007] In a possible design, the limiting member includes a connecting shaft and a limiting plate connected to each other; the connecting shaft is installed on the mounting frame; and the limiting plate is connected to the pressing member to limit the pressing member.

[0008] Through the above scheme, the connecting shaft can provide support for the limit plate, and the limit plate can provide support for the clamping member when the clamping member pushes the main shaft to prevent the clamping member from being pushed in the opposite direction by the main shaft and deviating in the direction away from the circuit breaker body, so that the clamping member can effectively push the main shaft.

[0009] In a possible design, a gap is provided between the connecting shaft and the main shaft, or the connecting shaft abuts against the main shaft.

[0010] When a gap is set between the connecting shaft and the main shaft, the connecting shaft can provide support for the limit plate. When the connecting shaft abuts the main shaft, it can provide support for the limit plate and apply force to the main shaft toward the circuit breaker body, preventing the main shaft from deforming away from the circuit breaker body. It can also apply force to the main shaft to limit the main shaft.

[0011] In a possible design, the limiting member includes a connecting plate and a limiting plate connected to each other; the connecting plate is installed on the mounting frame; and the limiting plate is connected to the pressing member to limit the pressing member.

[0012] Through this solution, the connecting plate can provide support for the limit plate, which in turn supports the pressing member when it pushes against the main shaft, preventing the pressing member from being pushed in the opposite direction by the main shaft and deflecting away from the circuit breaker body, allowing the pressing member to effectively push against the main shaft. Furthermore, the connecting plate can isolate the pressing member from other components within the circuit breaker, preventing these components from interfering with the pressing member's contact with the main shaft.

[0013] In one possible design, the pressure element is configured as a bearing.

[0014] With this solution, the bearing's peripheral wall can abut the main shaft, preventing the main shaft from deforming away from the circuit breaker body. Furthermore, during this abutment, the bearing and main shaft form a rolling fit. Compared to a sliding fit, the frictional resistance between the bearing and main shaft is lower, minimizing the bearing's impact on the main shaft's rotation. This facilitates the main shaft's smooth activation and disconnection of the contact mechanism.

[0015] In a possible design, the clamping member is configured to include a rotating shaft and a clamping ring, and the clamping ring is sleeved outside the rotating shaft; the rotating shaft is installed on the mounting frame and connected to the limiting member, and the clamping ring abuts the main shaft.

[0016] With the above solution, the circumferential wall of the clamping ring can abut against the main shaft to prevent the main shaft from deforming away from the circuit breaker body. Furthermore, while the clamping ring abuts the main shaft, the clamping ring can rotate, or both the rotating shaft and the clamping ring can rotate. The clamping ring and the main shaft can also form a rolling fit. The frictional resistance between the clamping ring and the main shaft is lower than that of a sliding fit, and the clamping ring has less impact on the rotation of the main shaft, which helps the main shaft smoothly drive the contact mechanism to connect or disconnect.

[0017] In a possible design, a plurality of pressing members are provided, and the plurality of pressing members are arranged along the circumference of the main shaft.

[0018] Through the above solution, the multiple pressing members can push the main shaft in multiple directions to prevent the main shaft from deforming in a direction away from the circuit breaker body.

[0019] In one possible design, the clamping member includes a first sub-member and a second sub-member; the angle θ between the line L1 between the rotation center of the first sub-member and the axis center of the main shaft, and the angle θ between the line L2 between the rotation center of the second sub-member and the axis center of the main shaft is configured to satisfy: 10°≤θ≤50°.

[0020] Through the above solution, the first sub-component and the second sub-component can abut the main shaft within a range of 10° to 50° from the axis of the main shaft to the peripheral wall to limit the deformation of the main shaft in a direction away from the circuit breaker body.

[0021] In a second aspect, an embodiment of the present application further provides a circuit breaker, comprising a circuit breaker body, a main shaft and the auxiliary mechanism of the first aspect; the mounting frame is mounted on the circuit breaker body; the clamping member abuts the main shaft to prevent the main shaft from deforming in a direction away from the circuit breaker body.

[0022] On the basis that the auxiliary mechanism of the first aspect can effectively restrict the main shaft, when the main shaft in the circuit breaker provided by this embodiment drives the movable contact and the static contact in the contact mechanism to contact, the contact pressure between the movable contact and the static contact will increase, and the contact reliability will be improved.

[0023] In one possible design, the circuit breaker is a frame circuit breaker.

[0024] The beneficial effects provided in the above-mentioned second aspect and the various possible designs of the above-mentioned second aspect can be referred to the beneficial effects brought about by the above-mentioned first aspect and the various possible implementation methods of the first aspect, and will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions of the embodiments of the present application, a brief introduction will be given below to the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0026] FIG1 is a schematic diagram of a circuit breaker in some embodiments of the present application.

[0027] FIG2 is a cross-sectional view of a circuit breaker in some embodiments of the present application.

[0028] FIG3 is a schematic diagram of an auxiliary mechanism in some embodiments of the present application.

[0029] FIG4 is a schematic diagram of a first type of limiting member in some embodiments of the present application.

[0030] FIG5 is a schematic diagram of a second type of limiting member in some embodiments of the present application.

[0031] FIG6 is a schematic diagram of a first type of pressing member in some embodiments of the present application.

[0032] FIG7 is a schematic diagram of a second type of pressing member in some embodiments of the present application.

[0033] FIG8 is an enlarged view of the O region in FIG2 .

[0034] Description of reference numerals:

[0035] 1-circuit breaker; 11-circuit breaker body; 12-main shaft; 13-auxiliary mechanism; 131-mounting frame; 131a-first side plate; 131b-second side plate; 131c-connecting rod; 132-pressing member; 132a-bearing; 132b-rotating shaft; 132c-pressing ring; 1321-first sub-component; 1322-second sub-component; 133-limiting member; 133a-connecting shaft; 133b-limiting plate; 133c-connecting plate; 134-energy storage spring. DETAILED DESCRIPTION

[0036] To make the purpose, technical solutions, and advantages of the embodiments of this application more clear, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0037] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application belongs; the terms used in the specification of the application are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification, claims and drawings of this application are intended to cover non-exclusive inclusions.

[0038] References to "embodiments" herein mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase "embodiment" in various places in the specification does not necessarily refer to the same embodiment, nor does it necessarily refer to independent or alternative embodiments that are mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0039] The directional words appearing in the following description are all directions shown in the drawings and do not limit the structure of this application. For example, in the description of this application, the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., which indicate directions or positional relationships, are based on the directions or positional relationships shown in the drawings and are only for the convenience of describing this application and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operate in a specific direction, and therefore should not be understood as limiting this application.

[0040] In addition, the terms "first", "second", etc. in the description and claims of this application or the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order, and may explicitly or implicitly include one or more such features.

[0041] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, the "connection" or "connection" of a mechanical structure may refer to a physical connection. For example, the physical connection may be a fixed connection, such as a fixed connection through a fixing member, such as a fixed connection through a screw, bolt, or other fixing member; the physical connection may also be a detachable connection, such as a mutual snap connection or snap connection; the physical connection may also be an integral connection, such as a connection formed by welding, bonding, or integral molding. For those skilled in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0042] Frame circuit breakers are typically installed in low-voltage power distribution systems to distribute power to low-voltage electrical equipment within the distribution system and protect low-voltage electrical equipment from abnormal conditions such as overcurrent, undervoltage, and short circuits. Specifically, when closed, the frame circuit breaker distributes power to the low-voltage electrical equipment; when a distribution system fault occurs, the frame circuit breaker opens to protect the low-voltage equipment.

[0043] The frame circuit breaker consists of an operating mechanism, a main shaft, and a contact mechanism. Both the operating mechanism and the contact mechanism are connected to the main shaft. When the operating mechanism is actuated, the main shaft rotates, which in turn drives the contact mechanism to connect or disconnect. The contact mechanism consists of a moving contact and a stationary contact. The moving contact is connected to the main shaft so that it makes contact or separates with the stationary contact as the main shaft rotates. When the moving contact makes contact with the stationary contact, the contact mechanism connects, closing the frame circuit breaker. When the moving contact separates from the stationary contact, the contact mechanism disconnects, opening the frame circuit breaker.

[0044] During the actual application of frame circuit breakers, those skilled in the art discovered that when the operating mechanism drives the main shaft to rotate, the main shaft will deform due to its long length, affecting the connection or disconnection of the contact mechanism. Based on this, those skilled in the art have proposed auxiliary mechanisms to restrain the main shaft and prevent deformation. However, during the application of existing auxiliary mechanisms, the inventors discovered that the components restraining the main shaft are pushed in the opposite direction by the main shaft and deflected, resulting in the main shaft not being effectively restrained.

[0045] Based on this, the inventors have conducted in-depth research and provided an auxiliary mechanism that uses a limiter to limit the component (pressing member) that limits the main shaft to prevent the component (pressing member) that limits the main shaft from being pushed in the opposite direction by the main shaft and being offset.

[0046] In order to enable those skilled in the art to better understand the technical solutions of the embodiments of the present application, the technical solutions of the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings.

[0047] The auxiliary mechanism 13 provided in the embodiment of the present application is applied to a circuit breaker 1. The circuit breaker 1 may be the aforementioned frame circuit breaker. Referring to Figures 1 and 2 , the circuit breaker 1 includes a circuit breaker body 11 and a main shaft 12 connected to each other. The main shaft 12 is located outside the circuit breaker body 11 and is connected to a contact mechanism within the circuit breaker body 11. The circuit breaker 1 also includes an operating mechanism connected to the main shaft 12 to drive the main shaft 12 to rotate, so that the rotation of the main shaft 12 drives the contact mechanism to connect or disconnect.

[0048] Referring to Figures 1 to 3 , the auxiliary mechanism 13 provided in the embodiment of the present application includes a mounting bracket 131, a pressing member 132, and a limiting member 133. The mounting bracket 131 is mounted to the circuit breaker body 11. The pressing member 132 is mounted to the mounting bracket 131 and abuts the main shaft 12; the pressing member 132 is used to prevent the main shaft 12 from deforming away from the circuit breaker body 11. The limiting member 133 is mounted to the mounting bracket 131 and connected to the pressing member 132; the limiting member 133 is used to limit the position of the pressing member 132 when the pressing member 132 abuts the main shaft 12.

[0049] As shown in Figure 3, the mounting bracket 131 may include a first side plate 131a and a second side plate 131b disposed opposite each other, connected by one or more connecting rods 131c. Both the first side plate 131a and the second side plate 131b have a bent portion that connects to the circuit breaker body 11, allowing the mounting bracket 131 to be mounted on the circuit breaker body 11. The first side plate 131a and the second side plate 131b may be connected to the circuit breaker body 11 by an assembly connection (e.g., a screw connection). Furthermore, both the first side plate 131a and the second side plate 131b have a notch on the side closest to the circuit breaker body 11 to provide clearance for the main shaft 12.

[0050] The pressing member 132 can be installed on the first side plate 131a and / or the second side plate 131b of the mounting frame 131. For example, the pressing member 132 and the mounting frame 131 can be connected in a fixed connection (for example, an integral connection) or an assembly connection (for example, a plug-in connection), and the embodiments of the present application do not specifically limit this. The pressing member 132 can be installed on the portion of the first side plate 131a close to the notch and / or the portion of the second side plate 131b close to the notch, so as to abut the main shaft 12. One or two pressing members 132 can be installed on one mounting frame 131.

[0051] When the pressing member 132 abuts the main shaft 12, it applies a force to the main shaft 12 toward the circuit breaker body 11, thereby preventing the main shaft 12 from deforming away from the circuit breaker body 11. When the main shaft 12 does not deform away from the circuit breaker body 11, the moving contact in the contact mechanism will not be pulled away from the static contact by the main shaft 12. This facilitates contact between the moving contact and the static contact. Furthermore, when the moving contact and the static contact come into contact, the contact pressure between them increases, improving contact reliability. In particular, when the circuit breaker 1 carries a short-circuit current (e.g., a short-time withstand current or a short-time delay current), the moving contact and the static contact maintain reliable contact and do not separate.

[0052] When the limiting member 133 is installed on the mounting frame 131, it can be installed on the first side plate 131a and / or the second side plate 131b of the mounting frame 131. Exemplarily, the limiting member 133 and the mounting frame 131 can also be connected in a fixed connection (for example, an integral connection) or an assembly connection (for example, plug-in). When the limiting member 133 is connected to the clamping member 132, the limiting member 133 can be connected to the end of the clamping member 132 away from the mounting frame 131, or connected between the end of the clamping member 132 away from the mounting frame 131 and the end close to the mounting frame 131. The embodiment of the present application does not specifically limit this. The number of limiting members 133 can be set based on the number of clamping members 132.

[0053] When the limiting member 133 abuts the pressing member 132 , it can apply a force to the pressing member 132 toward the circuit breaker body 11 to prevent the pressing member 132 from being pushed in the opposite direction by the main shaft 12 and deviating in the direction away from the circuit breaker body 11 , so that the pressing member 132 can effectively push the main shaft 12 .

[0054] Specifically, when the main shaft 12 deforms in a direction away from the circuit breaker body 11, the main shaft 12 may push against the pressing member 132 in the opposite direction away from the circuit breaker body 11, causing the pressing member 132 to deviate from its original position as a whole or one end of the pressing member 132 to deviate from its original position, thereby preventing it from effectively contacting the main shaft 12. To address this issue, the stopper 133 of the embodiment of the present application can apply a force toward the circuit breaker body 11 to the pressing member 132, thereby pushing against the stopper 133 and preventing the pressing member 132 from deviating away from the circuit breaker body 11, thereby enabling the pressing member 132 to effectively contact the main shaft 12.

[0055] In some embodiments, the limiting member 133 may be configured in various forms. For ease of understanding, the possible forms of the limiting member 133 are exemplarily described below with reference to the accompanying drawings.

[0056] In the first example, referring to FIG. 4 , the limiting member 133 includes a connecting shaft 133 a and a limiting plate 133 b ; the connecting shaft 133 a is mounted on the mounting frame 131 ; and the limiting plate 133 b is connected to the pressing member 132 to limit the pressing member 132 .

[0057] The connecting shaft 133a may be cylindrical or polygonal, etc., and this embodiment of the present application does not specifically limit this. When the connecting shaft 133a is installed on the mounting bracket 131, for example, the connecting shaft 133a may be installed on the mounting bracket 131 in an integral manner or in a plug-in manner, and this embodiment of the present application does not specifically limit this.

[0058] The limiting plate 133b can be a flat plate or an arc-shaped plate, etc., and this embodiment of the present application does not specifically limit this. When the limiting plate 133b is connected to the connecting shaft 133a, it can be connected in an integral manner or in a plug-in manner. When the limiting plate 133b is connected to the pressing member 132, it can also be connected in an integral manner or in a plug-in manner; and the limiting plate 133b can be connected to the end of the pressing member 132 away from the mounting frame 131, or connected between the end of the pressing member 132 away from the mounting frame 131 and the end close to the mounting frame 131.

[0059] In this example, the connecting shaft 133a can provide support for the limit plate 133b, and the limit plate 133b can provide support for the clamping member 132 when the clamping member 132 pushes against the main shaft 12, so as to prevent the clamping member 132 from being pushed in the opposite direction by the main shaft 12 and deviating in the direction away from the circuit breaker body 11, so that the clamping member 132 can effectively push against the main shaft 12.

[0060] In this example, the positional relationship between the connecting shaft 133 a and the main shaft 12 can be various.

[0061] In one possibility, the connecting shaft 133a abuts the main shaft 12. In this way, the connecting shaft 133a can provide support for the limiting plate 133b, and can also apply force to the main shaft 12 toward the circuit breaker body 11 to prevent the main shaft 12 from deforming away from the circuit breaker body 11, and can also apply force to the main shaft 12 to limit the main shaft 12.

[0062] Specifically, when the limiting plate 133 b receives the force from the pressing member 132 , the connecting shaft 133 a can apply force to the limiting plate 133 b to support the limiting plate 133 b so that the limiting plate 133 b limits the pressing member 132 .

[0063] When the connecting shaft 133 a is located on a side of the main shaft 12 away from the circuit breaker body 11 , the connecting shaft 133 a can apply a force to the main shaft 12 toward the circuit breaker body 11 , thereby blocking the main shaft 12 .

[0064] When the connecting shaft 133a is located below the main shaft 12, referring to Figures 1 and 2, the connecting shaft 133a can apply an upward force to the main shaft 12 to prevent the main shaft 12 from moving downward under the action of gravity, thereby limiting the main shaft.

[0065] In another possibility, a gap is provided between the connecting shaft 133a and the main shaft 12. In this way, when the limiting plate 133b is subjected to the force from the pressing member 132, the connecting shaft 133a can apply force to the limiting plate 133b to support the limiting plate 133b, so that the limiting plate 133b limits the pressing member 132.

[0066] In the second example, referring to FIG. 5 , the limiting member 133 includes a connecting plate 133 c and a limiting plate 133 b connected to each other; the connecting plate 133 c is mounted on the mounting frame 131 ; the limiting plate 133 b is connected to the pressing member 132 to limit the pressing member 132 .

[0067] The connecting plate 133c and the limiting plate 133b can both be configured as flat plates or curved plates. When the connecting plate 133c and the limiting plate 133b are connected, they can be connected integrally or by means of screws or other components, which is not specifically limited in this embodiment of the present application.

[0068] When the connecting plate 133c is installed on the mounting frame 131, it can be installed on the first side plate 131a and / or the second side plate 131b of the mounting frame 131 by riveting, pin connection or screw connection. This embodiment of the application does not specifically limit this.

[0069] The connection method of the limiting plate 133b and the pressing member 132, and the position where the limiting plate 133b is connected to the pressing member 132 can be the same as the first example mentioned above, and will not be repeated here.

[0070] In this example, the connecting plate 133c can provide support for the limiting plate 133b, and the limiting plate 133b can provide support for the pressing member 132 when the pressing member 132 pushes the main shaft 12, so as to prevent the pressing member 132 from being pushed in the opposite direction by the main shaft 12 and deviating in the direction away from the circuit breaker body 11, so that the pressing member 132 can effectively push the main shaft 12.

[0071] In addition, the connecting plate 133 c can also isolate the pressing member 132 from other components inside the circuit breaker 1 to prevent other components from affecting the abutment of the pressing member 132 against the main shaft 12 .

[0072] In some embodiments, the pressing member 132 can be configured in various forms. For ease of understanding, the possible forms of the pressing member 132 are exemplarily described below with reference to the accompanying drawings.

[0073] In some examples, referring to FIG. 6 , the pressing member 132 is configured as a bearing 132 a .

[0074] One end of the bearing 132a can be mounted on the first side plate 131a and / or the second side plate 131b of the mounting frame 131. The other end of the bearing 132a can be connected to the aforementioned limiting member 133 (specifically, can be connected to the aforementioned limiting plate 133b).

[0075] In this example, the peripheral wall of the bearing 132 a may abut against the main shaft 12 to prevent the main shaft 12 from deforming in a direction away from the circuit breaker body 11 .

[0076] In addition, when the bearing 132a abuts the main shaft 12, the bearing 132a and the main shaft 12 can be rolled together, and the friction resistance between the bearing 132a and the main shaft 12 is smaller than that of the sliding fit. The bearing 132a has less influence on the rotation of the main shaft 12, which is conducive to the main shaft 12 to smoothly drive the contact mechanism to connect or disconnect.

[0077] In other examples, see Figure 7, the clamping member 132 is configured to include a rotating shaft 132b and a clamping ring 132c, and the clamping ring 132c is sleeved outside the rotating shaft 132b; the rotating shaft 132b is installed on the mounting frame 131 and connected to the limit member 133, and the clamping ring 132c abuts the main shaft 12.

[0078] The clamping ring 132c can be interference-connected to the rotating shaft 132b or movably sleeved on the rotating shaft 132b. Based on the different connection methods between the clamping ring 132c and the rotating shaft 132b, the connection method between the rotating shaft 132b and the mounting bracket 131 also varies. For example, when the clamping ring 132c is interference-connected to the rotating shaft 132b, the rotating shaft 132b is rotatably mounted on the first side plate 131a and / or the second side plate 131b. When the clamping ring 132c is movably sleeved on the rotating shaft 132b, the rotating shaft 132b is fixedly mounted on the first side plate 131a and / or the second side plate 131b.

[0079] When the rotating shaft 132b is mounted on the limiting member 133, specifically, it can be mounted on the limiting plate 133b. The method of mounting the rotating shaft 132b on the limiting plate 133b can be the same as the method of mounting on the mounting frame 131, which will not be repeated here.

[0080] In this example, the peripheral wall of the clamping ring 132 c may abut against the main shaft 12 to prevent the main shaft 12 from deforming in a direction away from the circuit breaker body 11 .

[0081] In addition, during the process of the clamping ring 132c abutting against the main shaft 12, the clamping ring 132c can rotate, or the rotating shaft and the clamping ring 132c can both rotate, and the clamping ring 132c and the main shaft 12 can also be rolled together. The friction resistance between the clamping ring 132c and the main shaft 12 is smaller than that of the sliding fit, and the clamping ring 132c has less influence on the rotation of the main shaft 12, which is conducive to the main shaft 12 to smoothly drive the contact mechanism to connect or disconnect.

[0082] In some embodiments, please continue to refer to FIG. 8 , the pressing member 132 is provided in plurality, and the plurality of pressing members 132 are arranged along the circumference of the main shaft 12 .

[0083] When the plurality of pressing members 132 are distributed along the circumference of the main shaft 12 , for example, two adjacent pressing members 132 may fit together, or the plurality of pressing members 132 may be arranged at intervals, which is not particularly limited in the embodiment of the present application.

[0084] In this embodiment, the plurality of pressing members 132 can push the main shaft 12 in multiple directions to prevent the main shaft 12 from deforming in a direction away from the circuit breaker body 11 .

[0085] In some embodiments, please continue to refer to Figure 8, the clamping member 132 includes a first sub-member 1321 and a second sub-member 1322; the angle θ between the line L1 between the rotation center of the first sub-member 1321 and the axis of the main shaft 12, and the angle θ between the line L2 between the rotation center of the second sub-member 1322 and the axis of the main shaft 12 is configured to satisfy: 10°≤θ≤50°.

[0086] The first sub-component 1321 and the second sub-component 1322 can abut against the side of the main shaft 12 facing away from the circuit breaker body 11 and generate a component force in the direction toward the circuit breaker body 11 to push the main shaft 12 and prevent the main shaft 12 from deforming in the direction away from the circuit breaker body 11.

[0087] There can be multiple positions where the first sub-component 1321 abuts the main shaft 12 and the second sub-component 1322 abuts the main shaft 12. For example, taking the placement state of the circuit breaker 1 in FIG8 as an example, in the vertical direction, the position where the first sub-component 1321 abuts the main shaft 12 and the position where the second sub-component 1322 abuts the main shaft 12 can be distributed on the same side of the axis of the main shaft 12, or the position where the first sub-component 1321 abuts the main shaft 12 and the second sub-component 1322 abuts the main shaft 12 can be distributed on both sides of the axis of the main shaft 12, and this embodiment of the present application does not specifically limit this.

[0088] In addition, the angle θ between the line L1 between the rotation center of the first sub-component 1321 and the axis center of the main shaft 12, and the angle θ between the line L2 between the rotation center of the second sub-component 1322 and the axis center of the main shaft 12 can be configured to be 10°, 20°, 30°, 40° or 50°, etc., and the embodiments of the present application do not impose any special limitations on this.

[0089] In this example, the first sub-component 1321 and the second sub-component 1322 can abut the main shaft 12 within a range of 10° to 50° from the axis of the main shaft 12 to the peripheral wall to limit the deformation of the main shaft 12 in a direction away from the circuit breaker body 11.

[0090] It should be noted that, based on the structure of the aforementioned pressing member 132, when the limiting member 133 includes a connecting shaft 133a and a limiting plate 133b, and when the connecting shaft 133a abuts the main shaft 12, a small clearance can be preset between the connecting shaft 133a and the main shaft 12. In this way, when the pressing member 132 abuts the main shaft 12, the connecting shaft 133a does not interfere with the rolling fit between the pressing member 132 and the main shaft 12. When the main shaft 12 deforms significantly, the connecting shaft 133a can push against the main shaft 12 to prevent the main shaft 12 from deforming away from the circuit breaker body 11.

[0091] In addition, in some embodiments, referring to Figures 2 and 8, the connecting shaft 133a can be arranged on the side of the second sub-component 1322 away from the first sub-component 1321, and the angle θ1 between the line L2 between the rotation center of the second sub-component 1322 and the rotation center of the main shaft 12, and the angle θ1 between the line L3 between the axis of the connecting shaft 133a and the axis of the main shaft 12 are configured to satisfy: 10°≤θ1≤50°.

[0092] Combined with the positional relationship between the aforementioned first sub-component 1321 and the second sub-component 1322, the first sub-component 1321, the second sub-component 1322 and the connecting shaft 133a can be spaced apart and distributed within the range of 20° to 100° from the axis of the main shaft 12 to the peripheral wall, so as to abut the main shaft 12 from three directions and prevent the main shaft 12 from deforming in a direction away from the circuit breaker body 11.

[0093] In some embodiments, please continue to refer to Figure 3, the auxiliary mechanism 13 also includes an energy storage spring 134, one end of the energy storage spring 134 is connected to the cantilever of the main shaft 12, and the other end of the energy storage spring 134 is connected to the connecting rod 131c of the mounting bracket 131.

[0094] When the contact mechanism of the circuit breaker body 11 is connected, the energy storage spring 134 can be compressed to store energy, and the energy storage spring 134 can press the main shaft 12, so that the main shaft 12 drives the movable contact and the static contact of the contact mechanism to make reliable contact.

[0095] At the moment when the contact mechanism of the circuit breaker body 11 is disconnected, the energy storage spring 134 can release energy and pull the main shaft 12, so that the main shaft 12 drives the moving contact and the static contact to separate quickly.

[0096] It should be noted that one or more auxiliary mechanisms 13 provided in the embodiment of the present application may be provided. For example, when multiple auxiliary mechanisms 13 are provided, the multiple auxiliary mechanisms 13 may be distributed at different locations of the main shaft 12 to limit the main shaft 12 from deforming in a direction away from the circuit breaker body 11.

[0097] As described above, the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. An auxiliary mechanism, applied to a circuit breaker, comprising a circuit breaker body and a main shaft connected to each other, characterized in that: The auxiliary mechanism includes: A mounting bracket, mounted on the circuit breaker body; A pressing member is mounted on the mounting bracket and abuts against the main shaft; the pressing member is used to prevent the main shaft from deforming in a direction away from the circuit breaker body; A limiting member is installed on the mounting frame and connected to the pressing member; the limiting member is used to limit the pressing member when the pressing member abuts against the main shaft.

2. The auxiliary mechanism according to claim 1, wherein: The limiting member includes a connecting shaft and a limiting plate connected to each other; the connecting shaft is installed on the mounting frame; the limiting plate is connected to the pressing member to limit the pressing member.

3. The auxiliary mechanism according to claim 2, characterized in that: The connecting shaft abuts against the main shaft; Alternatively, a gap is provided between the connecting shaft and the main shaft.

4. The auxiliary mechanism according to claim 1, wherein: The limiting member includes a connecting plate and a limiting plate connected to each other; the connecting plate is installed on the mounting frame; the limiting plate is connected to the pressing member to limit the pressing member.

5. The auxiliary mechanism according to claim 1, wherein: The pressing element is configured as a bearing.

6. The auxiliary mechanism according to claim 1, wherein: The pressing member is configured to include a rotating shaft and a pressing ring, wherein the pressing ring is sleeved outside the rotating shaft; the rotating shaft is mounted on the mounting bracket and connected to the limiting member, and the pressing ring abuts against the main shaft.

7. The auxiliary mechanism according to claim 5 or 6, characterized in that: The pressing members are provided in plurality, and the plurality of pressing members are arranged along the circumference of the main shaft.

8. The auxiliary mechanism according to claim 7, characterized in that: The clamping member includes a first sub-member and a second sub-member; the angle θ between the line L1 between the rotation center of the first sub-member and the axis of the main shaft, and the angle θ between the line L2 between the rotation center of the second sub-member and the axis of the main shaft is configured to satisfy: 10°≤θ≤50°.

9. A circuit breaker, characterized in that: It comprises a circuit breaker body, a main shaft and the auxiliary mechanism according to any one of claims 1 to 8; the mounting bracket is mounted on the circuit breaker body; the pressing member abuts against the main shaft to prevent the main shaft from deforming in a direction away from the circuit breaker body.

10. The circuit breaker according to claim 9, wherein: The circuit breaker is a frame circuit breaker.

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