Circuit breaker

Abstract

The utility model provides a circuit breaker, and belongs to the technical field of electrical equipment. The circuit breaker comprises a tripping mechanism, a mechanical lock and a draw bar. The mechanical lock comprises a transmission piece and a driving piece, and the transmission piece is movably connected with the driving piece. The traction rod is matched with the tripping mechanism and provided with a traction arm, and the traction arm is located on the moving path of the driving piece. When the transmission part rotates, the driving part can be driven to move in the direction close to the traction rod, so that the driving part abuts against the traction arm, and the traction rod is matched with the tripping mechanism to achieve opening operation of the circuit breaker. When the circuit breaker is in an opening state, the driving piece can abut against the traction arm, so that the circuit breaker cannot be closed. The mechanical lock with the self-locking function is arranged on the circuit breaker, the opening state of the circuit breaker can be locked after the circuit breaker completes opening operation, the possibility that the circuit breaker is switched on due to mistaken touch during daily overhaul and maintenance of electrical equipment can be reduced, and the safety of overhaul and maintenance personnel is improved.

Description

Technical Field

[0001] This application relates to the field of electrical equipment technology, and more particularly to a circuit breaker. Background Technology

[0002] A circuit breaker is an important component for protecting circuits. When an overload, short circuit, or leakage occurs in a circuit, the circuit breaker can quickly disconnect the circuit, thereby protecting the electrical equipment.

[0003] During routine maintenance and repair of electrical equipment, circuit breakers must be disconnected before any operation is performed. If maintenance personnel operate from a distance without displaying warning signs, unsuspecting individuals may accidentally close the circuit breaker, which could cause serious personal injury to the maintenance personnel. Utility Model Content

[0004] This application provides a circuit breaker that improves the safety of maintenance personnel when performing maintenance on the circuit breaker.

[0005] In a first aspect, this application provides a circuit breaker, including a tripping mechanism, a mechanical lock, and a traction rod. The mechanical lock includes a transmission component and a driving component, the transmission component and the driving component being movably connected. The traction rod cooperates with the tripping mechanism, and the traction rod has a traction arm located on the movement path of the driving component. When the transmission component rotates, it can drive the driving component to move towards the traction rod, causing the driving component to push against the traction arm, thereby enabling the traction rod to cooperate with the tripping mechanism to achieve the opening operation of the circuit breaker. When the circuit breaker is in the open state, the driving component can abut against the traction arm, preventing the circuit breaker from closing.

[0006] Through the above-described solution, this application incorporates a self-locking mechanical lock on the circuit breaker. This locks the circuit breaker's open state after the opening operation is completed, reducing the possibility of accidental closing during routine maintenance and thus improving the safety of maintenance personnel. The mechanical lock is designed as a combination of a transmission component and a drive component, allowing the transmission component to move the drive component. By installing a traction arm on the traction rod and having the drive component move the traction arm, a linkage between the mechanical lock and the traction rod is achieved. Therefore, during maintenance, it is unnecessary to first open the circuit breaker and then lock the mechanical lock; the mechanical lock alone is sufficient to open the circuit breaker and lock the open state, reducing the number of steps required for maintenance personnel. This decreases the likelihood of errors due to excessive maintenance procedures.

[0007] In one possible design, the circuit breaker also includes a housing comprising a top cover and a base, with the top cover over the base. The base has an installation space within which the tripping mechanism and the traction rod are located. A mechanical lock is located on the side wall of the top cover facing the base.

[0008] With the above-described solution, the circuit breaker mentioned in this application has an installation space within the base, which can house both the tripping mechanism and the traction rod. This allows the base to protect both the tripping mechanism and the traction rod. When the mechanical lock is mounted on the top cover, it saves installation space within the base, eliminating the need for additional space for the mechanical lock. This reduces the size of the circuit breaker. Furthermore, mounting the mechanical lock on the side wall of the top cover facing the base ensures that the mechanical lock can be linked with the traction rod during use.

[0009] In one possible design, a guide is provided on the side wall of the top cover facing the base. The guide has a guide surface on the side facing the base. The drive unit has a guide block that abuts against the guide surface, which guides the drive unit to move towards or away from the traction rod.

[0010] With the above solution, a guide is provided on the side wall of the top cover facing the base. The guide has a guide surface, and the drive component has a guide block that abuts against the guide surface. In this way, when the transmission component drives the drive component to move, the drive component can move towards the traction rod under the guidance of the guide surface. This reduces the probability of the drive component shifting position during movement and failing to link with the traction rod. Furthermore, when the drive component moves away from the traction rod to reset, the guide surface can also guide the movement of the drive component, reducing the probability of the drive component shifting position during reset and affecting the next use of the mechanical lock, thus improving the reliability of the mechanical lock.

[0011] In one possible design, the transmission component includes a drive shaft, and the drive shaft has a groove. The drive shaft is located within the groove, and its sidewall contacts the groove wall. When the transmission component rotates, the drive shaft pushes against the groove wall, causing the drive component to rotate and move relative to the transmission component.

[0012] The above solution involves incorporating a drive shaft within the transmission component and a sliding groove within the drive shaft. When the transmission component rotates, the drive shaft pushes against the groove wall, causing the drive component to rotate along with it. During rotation, the drive component, in conjunction with a guide component, moves towards the traction rod. When the side wall of the drive shaft contacts the groove wall, the drive shaft can immediately drive the drive component to rotate, thus improving the response speed of the mechanical lock.

[0013] In one possible design, the drive shaft includes a first shaft and a second shaft, which are located on opposite sides of the transmission component. The slide includes a first groove and a second groove, which are located on opposite sides of the drive component. The first shaft is located in the first groove, and the second shaft is located in the second groove.

[0014] Compared to the previous method of having a drive shaft on the transmission component and a groove on the drive component, this embodiment, with the first shaft located in the first groove and the second shaft located in the second groove, makes the process of the transmission component driving the drive component to rotate more stable. This reduces the probability of the drive component failing to form a linkage with the traction rod due to insufficient stability in the rotation of the transmission component driving the drive component. When the first shaft and the second shaft are located on opposite sides of the transmission component, and the first groove and the second groove are located on opposite sides of the drive component, the stability of the process of the transmission component driving the drive component to rotate is further increased, improving the reliability of the mechanical lock.

[0015] In one possible design, the mechanical lock also includes a lock cylinder. The drive mechanism has a receiving cavity. A transmission mechanism is located within the receiving cavity, and a portion of the lock cylinder passes through the drive mechanism and is fixedly connected to it. The lock cylinder can drive the transmission mechanism to rotate under the action of an external force.

[0016] The above solution incorporates a receiving cavity within the drive component, housing both the transmission component and part of the lock cylinder. This saves on the size of the mechanical lock, thereby reducing the size of the circuit breaker. By fixing the lock cylinder and transmission component together, when an external force is applied to the lock cylinder to rotate it, the transmission component rotates along with it, which in turn drives the drive component to rotate. This simplifies the use of the mechanical lock, making it easier for maintenance personnel to operate.

[0017] In one possible design, the lock cylinder includes a keyhole located at the end of the lock cylinder away from the transmission component, for inserting a key. The top cover has an operating hole that penetrates the top cover, through which the keyhole protrudes.

[0018] The above solution allows the lock cylinder to be exposed through the operating hole in the top cover. This enables maintenance personnel to directly insert the key into the lock cylinder from outside the circuit breaker, reducing the need for them to first open the top cover and insert the key when using the mechanical lock. This reduces the probability of errors occurring when using the mechanical lock to trip the circuit breaker due to excessive operational steps.

[0019] In one possible design, the mechanical lock also includes a reset element. The reset element is located within the receiving cavity and includes a first end and a second end positioned opposite each other. The first end abuts against the transmission element, and the second end abuts against the inner wall of the drive element. The reset element is capable of moving the drive element away from the traction rod.

[0020] By incorporating a reset component within the mechanical lock using the above solution, after the lock is unlocked, the reset component moves the drive component away from the traction rod, thus resetting the drive component. This reduces the probability of the drive component failing to reset during use, affecting subsequent lock operations. The first end of the reset component abuts against the transmission component, and the second end abuts against the inner wall of the drive component. When the transmission component is fixed to the lock cylinder, the drive component compresses the reset component during movement, storing energy and reducing the probability of the reset component failing to fully store energy due to the lack of a fixed end.

[0021] In one possible design, the reset element is a spring.

[0022] The above solution utilizes springs, which have advantages such as high elasticity, simple structure, and low manufacturing cost. Using springs as the reset component can not only reduce the manufacturing cost of mechanical locks but also ensure their reliability.

[0023] In one possible design, the end of the mechanical lock facing inwards from the circuit breaker is provided with an insulating protective sleeve.

[0024] With the above solution, since the mechanical lock is located on the top cover facing the base, the end of the mechanical lock facing the inside of the circuit breaker is relatively close to the internal components after installation. Since mechanical locks are typically made of metal, they are prone to conductivity. The insulating protective sleeve can separate the internal components from the mechanical lock, thus protecting it. Therefore, even if the internal components are conductive, the mechanical lock will not become conductive due to its proximity to the components. This provides insulation protection for the end of the mechanical lock facing the inside of the circuit breaker. When maintenance personnel operate the mechanical lock, the risk of electric shock is reduced, improving their safety when maintaining electrical equipment. Attached Figure Description

[0025] Figure 1 An exploded view of the top cover and mechanical lock provided in an embodiment of this application.

[0026] Figure 2 This is a schematic diagram of the structure of the traction rod provided in an embodiment of this application.

[0027] Figure 3This is a schematic diagram of the overall structure of the circuit breaker provided in the embodiments of this application.

[0028] Figure 4 An exploded view of a portion of the structure of a circuit breaker provided in an embodiment of this application.

[0029] Figure 5 This is a schematic diagram of the top cover provided in an embodiment of this application from one perspective.

[0030] Figure 6 This is a schematic diagram of the structure of the driving component provided in an embodiment of this application.

[0031] Figure 7 This is a schematic diagram of the transmission component provided in an embodiment of this application from one perspective.

[0032] Figure 8 This is a schematic diagram of the transmission component provided in an embodiment of this application from another perspective.

[0033] Figure 9 This is a structural schematic diagram of the top cover provided in an embodiment of this application from another perspective.

[0034] Explanation of reference numerals in the attached figures:

[0035] 100. Housing; 110. Base; 120. Top cover; 121. Guide; 122. Operating hole;

[0036] 200. Mechanical lock; 210. Transmission component; 211. Drive shaft; 211a. First shaft; 211b. Second shaft; 220. Drive component; 221. Guide block; 222. Slide groove; 222a. First groove; 222b. Second groove; 230. Lock cylinder; 231. Lock hole; 240. Reset component; 250. Insulating protective sleeve;

[0037] 300. Towing bar; 310. Towing arm. Detailed Implementation

[0038] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0039] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein in the specification of the application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

[0040] The terms "comprising" and "having," and any variations thereof, used in the specification, claims, and drawings of this application are intended to cover without excluding other meanings. The words "a" or "an" do not exclude the presence of multiples.

[0041] The term "embodiment" as used herein means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of the phrase "embodiment" in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0042] In this article, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, the character " / " in this article generally indicates that the preceding and following related objects have an "or" relationship.

[0043] The directional terms appearing in the following description refer to the directions shown in the figures and are not intended to limit the specific structure of this application. For example, in the description of this application, terms such as "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the figures. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0044] Furthermore, the terms "first," "second," etc., in the specification and claims of this application or in the aforementioned drawings are used to distinguish different objects rather than to describe a specific order, and may explicitly or implicitly include one or more of the features.

[0045] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, "connection" or "joining" in mechanical structures can refer to a physical connection. A physical connection can be a fixed connection, such as a connection secured by fasteners, such as a connection secured by screws, bolts, or other fasteners; a physical connection can also be a detachable connection, such as a snap-fit ​​or interlocking connection; a physical connection can also be an integral connection, such as a connection formed by welding, bonding, or integral molding. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

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

[0047] Figure 1 An exploded view of the top cover and mechanical lock provided in an embodiment of this application. Figure 2 This is a schematic diagram of the structure of the traction rod provided in an embodiment of this application. Figure 3 This is a schematic diagram of the overall structure of the circuit breaker provided in an embodiment of this application. Figures 1 to 3 As shown, this application provides a circuit breaker, including a tripping mechanism, a mechanical lock 200, and a traction rod 300. The mechanical lock 200 includes a transmission member 210 and a driving member 220, with the transmission member 210 and the driving member 220 movably connected. The traction rod 300 cooperates with the tripping mechanism and has a traction arm 310 located on the movement path of the driving member 220. When the transmission member 210 rotates, it drives the driving member 220 to move closer to the traction rod 300, causing the driving member 220 to push against the traction arm 310, thereby enabling the traction rod 300 to cooperate with the tripping mechanism to achieve the circuit breaker's opening operation. When the circuit breaker is in the open state, the driving member 220 can abut against the traction arm 310, preventing the circuit breaker from closing.

[0048] The tripping mechanism is one of the important components within a circuit breaker. It is mainly used to automatically disconnect the circuit in case of abnormal conditions such as overload, short circuit, or leakage, protecting equipment and personnel. The circuit breaker also includes an operating mechanism. The tripping mechanism mentioned in this application works in conjunction with the operating mechanism via a traction rod 300 to open or close the circuit breaker. Alternatively, the traction rod 300 can also independently drive the tripping mechanism to open or close the circuit breaker.

[0049] The traction rod 300 can be columnar and can rotate during the opening or closing of the circuit breaker. The traction arm 310 can be a plate-like structure extending outward from the side wall of the traction rod 300. During the rotation of the traction rod 300, the traction arm 310 will move together with the traction rod 300, or the traction rod 300 will rotate together with the traction arm 310 when it is driven to move.

[0050] A mechanical lock 200 is disposed on one side of the traction rod 300. The mechanical lock 200 has a locking function; after the circuit breaker is opened, the mechanical lock 200 can lock the open state of the circuit breaker, preventing it from closing. Exemplarily, the mechanical lock 200 includes a movably connected transmission component 210 and a driving component 220. The transmission component 210 can rotate under external force. During rotation, the transmission component 210 drives the driving component 220 to move closer to the traction rod 300. During this movement, the driving component 220 abuts against the traction arm 310. After abutting against the traction arm 310, the driving component 220 continues to move, pushing against the traction arm 310 and causing it to move. The traction arm 310, in turn, rotates the traction rod 300 during this movement.

[0051] During the rotation of the traction rod 300 driven by the drive component 220, the traction rod 300 can drive the tripping mechanism to move, causing the circuit breaker to open. Furthermore, after the circuit breaker completes the opening operation, the drive component 220 remains in contact with the traction arm 310, thus keeping the circuit breaker in the open state and preventing it from closing.

[0052] In summary, this application provides a mechanical lock 200 with a self-locking function on the circuit breaker, which can lock the open state of the circuit breaker after the opening operation is completed. This reduces the possibility of the circuit breaker being accidentally closed during routine maintenance of electrical equipment, thereby improving the safety of maintenance personnel when performing maintenance on the circuit breaker.

[0053] The mechanical lock 200 is configured as a combination of a transmission component 210 and a drive component 220, allowing the drive component 220 to move via the transmission component 210. By installing a traction arm 310 on the traction rod 300 and having the drive component 220 move the traction arm 310, linkage between the mechanical lock 200 and the traction rod 300 is achieved. Thus, during electrical equipment maintenance, it is unnecessary to first open the circuit breaker and then lock the mechanical lock 200; the operation of opening the circuit breaker and locking the open state can be completed solely through the mechanical lock 200, reducing the number of steps required for maintenance personnel. This reduces the possibility of errors caused by excessive maintenance procedures.

[0054] Figure 4 An exploded view of a portion of the structure of a circuit breaker provided in an embodiment of this application. (See attached image.) Figure 3 as well as Figure 4 As shown, the circuit breaker also includes a housing 100, which includes a top cover 120 and a base 110, with the top cover 120 covering the base 110. The base 110 has an installation space within which the tripping mechanism and the traction rod 300 are located. A mechanical lock 200 is located on the side wall of the top cover 120 facing the base 110.

[0055] The housing 100 includes a base 110, a middle cover, and a top cover 120. The base 110 has an internal installation space. The middle cover is fitted onto the base 110 and not only protects the components installed inside the base 110 but also limits their movement. The top cover 120 is fitted onto the middle cover and has a clearance groove. A mechanical lock 200 on the top cover 120 can pass through this clearance groove and be linked with a pull rod 300 located inside the base 110.

[0056] In summary, the circuit breaker mentioned in this application has an installation space within the base 110, which can house both the tripping mechanism and the traction rod 300. This allows the base 110 to protect both the tripping mechanism and the traction rod 300. When the mechanical lock 200 is mounted on the top cover 120, it saves installation space within the base 110, eliminating the need for additional installation space for the mechanical lock 200 and thus reducing the size of the circuit breaker. Furthermore, mounting the mechanical lock 200 on the side wall of the top cover 120 facing the base 110 ensures that the mechanical lock 200 can be linked with the traction rod 300 during use.

[0057] There are multiple ways to implement the mechanical lock 200 to drive the traction rod 300 to complete the release action of the release mechanism.

[0058] Figure 5This is a schematic diagram of the top cover provided in an embodiment of this application from one perspective. Figure 6 This is a schematic diagram of the structure of the driver provided in an embodiment of this application. For example, as shown... Figure 1 , Figures 4 to 6 As shown, a guide member 121 is provided on the side wall of the top cover 120 facing the base 110. The guide member 121 has a guide surface on the side facing the base 110. The drive member 220 is provided with a guide block 221, which abuts against the guide surface. The guide surface is used to guide the drive member 220 to move towards or away from the traction rod 300 through the guide block 221.

[0059] The guide member 121 can be a plate-like structure disposed on the side wall of the top cover 120 facing the base 110. The guide member 121 may include a first guide member and a second guide member, and there may be a gap between the first guide member and the second guide member. The transmission member 210 and the driving member 220 may both be located within this gap. The guide surface can be the side wall of the guide member 121 facing the base 110. The guide surface can be a guide slope, wherein the inclination directions of the guide surface of the first guide member and the guide surface of the second guide member may be different.

[0060] The guide block 221 is disposed on the side wall of the drive member 220. The guide block 221 may include a first guide block and a second guide block, and the first guide block and the second guide block may be symmetrically arranged. In this way, when the guide member 121 guides the guide block 221 to move, the movement of the drive member 220 can be more stable.

[0061] Since the driving component 220 rotates during its movement, the relative position of the guide block 221 and the guide component 121 changes during this rotation. To address this, the volume of the guide component 121 can be increased to enlarge the area of ​​the guide surface, thereby reducing the probability of misalignment between the guide block 221 and the guide surface. Alternatively, the guide component 121 can be made to have a certain curvature, ensuring that the guide surface remains on the rotational trajectory of the guide block 221, thus reducing the probability of misalignment between the guide block 221 and the guide surface.

[0062] During the movement of the drive member 220 driven by the transmission member 210, the guide block 221 is always in contact with the guide surface. Furthermore, when the circuit breaker is in the closed state, the drive member 220 is at its closest position to the top cover 120. At this time, the first guide block abuts against the guide surface of the first guide member near the top cover 120, and the second guide block abuts against the guide surface of the second guide member near the top cover 120. During the movement of the drive member 220 driven by the transmission member 210, the first guide block moves along the guide surface of the first guide member towards the traction rod 300, and the second guide block moves along the guide surface of the second guide member towards the traction rod 300.

[0063] In summary, the top cover 120 has a guide member 121 on its side wall facing the base 110. The guide member 121 has a guide surface, and the drive member 220 has a guide block 221 that abuts against the guide surface. Thus, when the transmission member 210 moves the drive member 220, it can move closer to the traction rod 300 under the guidance of the guide surface, reducing the probability of the drive member 220 shifting position during movement and failing to coordinate with the traction rod 300. Furthermore, during the process of the drive member 220 moving away from the traction rod 300 to reset, the guide surface also guides the movement of the drive member 220, reducing the probability of the drive member 220 shifting position during reset and affecting the next use of the mechanical lock 200, thereby improving the reliability of the mechanical lock 200.

[0064] Figure 7 This is a schematic diagram of the transmission component provided in an embodiment of this application from one perspective. Figure 8 This is a schematic diagram of the transmission component provided in an embodiment of this application from another perspective. (See diagram below.) Figures 6 to 8 As shown, the transmission component 210 is provided with a drive shaft 211, and the drive component 220 is provided with a slide groove 222. The drive shaft 211 is located inside the slide groove 222, and the side wall of the drive shaft 211 is in contact with the groove wall of the slide groove 222. When the transmission component 210 rotates, the drive shaft 211 pushes against the groove wall of the slide groove 222, causing the drive component 220 to rotate and move relative to the transmission component 210.

[0065] The drive shaft 211 can be a protrusion on the transmission member 210, and the groove 222 can be a recess on the drive member 220. When the transmission member 210 drives the drive member 220 to move, the drive shaft 211 pushes against the groove wall of the groove 222, which can make the drive member 220 rotate together with the transmission member 210.

[0066] Since the transmission component 210 does not move with the drive component 220 during the use of the mechanical lock 200, when the transmission component 210 drives the drive component 220 to move towards the direction of the traction rod 300, the drive shaft 211 will slide in the slide groove 222.

[0067] With the above configuration, the transmission component 210 is equipped with a drive shaft 211, and the drive component 220 is equipped with a slide groove 222, with the drive shaft 211 located within the slide groove 222. Thus, when the transmission component 210 rotates, the drive shaft 211 can push against the wall of the slide groove 222, causing the drive component 220 to rotate along with the transmission component 210. During rotation, the drive component 220, in conjunction with the guide component 121, can move towards the direction closer to the traction rod 300. When the side wall of the drive shaft 211 contacts the wall of the slide groove 222, the drive shaft 211 can immediately drive the drive component 220 to rotate, thereby improving the response speed of the mechanical lock 200.

[0068] Please continue to refer to Figure 1 , Figures 6 to 8 As shown, the drive shaft 211 includes a first shaft 211a and a second shaft 211b, which are located on opposite sides of the transmission member 210. The slide groove 222 includes a first groove 222a and a second groove 222b, which are located on opposite sides of the drive member 220. The first shaft 211a is located in the first groove 222a, and the second shaft 211b is located in the second groove 222b.

[0069] The first shaft 211a and the second shaft 211b can be symmetrically arranged, as can the first groove 222a and the second groove 222b. The sidewall of the first shaft 211a can contact the groove wall of the first groove 222a, and the sidewall of the second shaft 211b can contact the groove wall of the second groove 222b. When the transmission member 210 rotates, the first shaft 211a pushes against the groove wall of the first groove 222a, and simultaneously, the second shaft 211b pushes against the groove wall of the second groove 222b, causing the driving member 220 to rotate synchronously.

[0070] In summary, compared to the case where the transmission component 210 has a drive shaft 211 and the drive component 220 has a groove 222, in this embodiment, the first shaft 211a is located in the first groove 222a and the second shaft 211b is located in the second groove 222b. This makes the process of the transmission component 210 driving the drive component 220 to rotate more stable, reducing the probability of the drive component 220 failing to form a linkage with the traction rod 300 due to insufficient stability when the transmission component 210 drives the drive component 220 to rotate. When the first shaft 211a and the second shaft 211b are located on opposite sides of the transmission component 210, and the first groove 222a and the second groove 222b are located on opposite sides of the drive component 220, the stability of the process of the transmission component 210 driving the drive component 220 to rotate is further increased, improving the reliability of the mechanical lock 200.

[0071] like Figure 1 as well as Figure 6As shown, the mechanical lock 200 also includes a lock cylinder 230. The drive member 220 has a receiving cavity. The transmission member 210 is located within the receiving cavity, and part of the lock cylinder 230 passes through the drive member 220 and is fixedly connected to the transmission member 210. Under the action of external force, the lock cylinder 230 can drive the transmission member 210 to rotate.

[0072] The slide groove 222 can be a through groove penetrating the side wall of the drive member 220, allowing the drive shaft 211 to pass through the slide groove 222 when the transmission member 210 is located within the receiving cavity. Alternatively, the slide groove 222 can be a blind groove provided on the inner wall of the drive member 220, allowing the drive shaft 211 to be located within the blind groove when the transmission member 210 is located within the receiving cavity. The end of the drive member 220 facing the top cover 120 has a through hole, through which the lock cylinder 230 can partially pass into the receiving cavity of the drive member 220. The end of the drive member 220 facing the base 110 can also have a through hole, through which the transmission member 210 can be installed within the receiving cavity of the drive member 220.

[0073] With the above configuration, a receiving cavity is provided within the driving component 220, allowing the transmission component 210 and part of the lock cylinder 230 to reside within this cavity. This saves space in the mechanical lock 200, thereby reducing the size of the circuit breaker. The lock cylinder 230 is fixedly connected to the transmission component 210. When an external force is applied to the lock cylinder 230 to cause it to rotate, the transmission component 210 rotates along with it, which in turn drives the driving component 220 to rotate. This simplifies the use of the mechanical lock 200, making it easier for maintenance personnel to operate.

[0074] Figure 9 This is a schematic diagram of the top cover provided in an embodiment of this application from another perspective. (See diagram below.) Figure 3 , Figure 4 as well as Figure 9 As shown, the lock cylinder 230 includes a lock hole 231, which is located at the end of the lock cylinder 230 away from the transmission member 210, and is used for inserting a key. The top cover 120 has an operating hole 122 that penetrates the top cover 120, and the lock hole 231 is exposed in the operating hole 122.

[0075] The keyhole 231 allows a key to be inserted so that the key can control the lock cylinder 230 to rotate. When the top cover 120 is placed on the middle cover, the keyhole 231 can be exposed outside the circuit breaker housing 100 through the operating hole 122.

[0076] With the above-described configuration, the operating hole 122 penetrating the top cover 120 allows the lock cylinder 230 to protrude from the top cover 120. This allows maintenance personnel to directly insert the key into the lock hole 231 from outside the circuit breaker, reducing the need for maintenance personnel to first open the top cover 120 and then insert the key into the lock hole 231 when using the mechanical lock 200. This reduces the probability of errors occurring when using the mechanical lock 200 to trip the circuit breaker due to excessive operating steps.

[0077] like Figure 1 as well as Figure 6 As shown, the mechanical lock 200 also includes a reset member 240. The reset member 240 is located within the receiving cavity and includes a first end and a second end positioned opposite each other. The first end abuts against the transmission member 210, and the second end abuts against the inner wall of the drive member 220. The reset member 240 is capable of driving the drive member 220 to move away from the traction rod 300.

[0078] The reset element 240 can be a spring. Because springs have advantages such as high elasticity, simple structure, and low manufacturing cost, choosing a spring as the reset element 240 can not only reduce the manufacturing cost of the mechanical lock 200 but also ensure the reliability of the mechanical lock 200. Since the transmission element 210 is located within the receiving cavity of the drive element 220 and is fixedly connected to the lock cylinder 230, when the spring is located within the receiving cavity, the first end of the spring can abut against the transmission element 210, and the second end of the spring can abut against the inner wall of the drive element 220 facing the base 110.

[0079] The reset member 240 can be used as follows: when the transmission member 210 drives the drive member 220 to move towards the traction rod 300, the drive member 220 can compress the reset member 240, allowing it to store energy. When the circuit breaker is in the open state, the mechanical lock 200 is locked, fixing the position of the drive member 220, and the reset member 240 remains in a compressed state. When the mechanical lock 200 is released, the reset member 240 releases energy, causing the drive member 220 to move away from the traction rod 300, thus resetting the drive member 220.

[0080] In summary, by incorporating a reset member 240 within the mechanical lock 200, after the mechanical lock 200 is unlocked, the reset member 240 can drive the drive member 220 to move away from the traction rod 300, thereby resetting the drive member 220. This reduces the probability of the mechanical lock 200 failing to reset during use, thus affecting its subsequent use. The first end of the reset member 240 abuts against the transmission member 210, and the second end abuts against the inner wall of the drive member 220. When the transmission member 210 is fixed to the lock cylinder 230, the drive member 220 can compress the reset member 240 during movement, storing energy in it. This reduces the probability of the reset member 240 failing to fully store energy during the energy storage process due to the lack of a fixed end.

[0081] like Figure 1 as well as Figure 4 As shown, the mechanical lock 200 has an insulating protective sleeve 250 at one end facing the inside of the circuit breaker.

[0082] The insulating protective sleeve 250 can be made of a non-conductive material. The diameter of the cross-section of the insulating protective sleeve 250 along the axial direction needs to be smaller than the diameter of the drive member 220 along the axial direction, so that after the insulating protective sleeve 250 is installed on the mechanical lock 200, the insulating protective sleeve 250 will not interfere with the movement of the drive member 220.

[0083] With the above configuration, since the mechanical lock 200 is positioned on the top cover 120 facing the base 110, the end of the mechanical lock 200 facing the inside of the circuit breaker is relatively close to the internal components after installation. Since the mechanical lock 200 is typically made of metal, it is prone to conductivity. The insulating protective sleeve 250 separates the internal components from the mechanical lock 200, thus protecting it. Even if the internal components are conductive, the mechanical lock 200 will not become conductive due to its proximity to the components. This provides insulation protection for the end of the mechanical lock 200 facing the inside of the circuit breaker. When maintenance personnel operate the mechanical lock 200, the risk of electric shock is reduced, improving their safety when maintaining electrical equipment.

[0084] To make it easier to understand, the installation process of mechanical locks will be described below.

[0085] The installation process of the mechanical lock 200 is as follows: First, install the lock cylinder 230 onto the top cover 120, so that the lock hole 231 is exposed on the top cover 120. Then, fit the drive component 220 onto the lock cylinder 230. To increase the reliability of the drive component 220 during installation, a gasket can be placed on the lock cylinder 230 before fitting the drive component 220 onto the lock cylinder 230. After the drive component 220 is fitted onto the lock cylinder 230, install the reset component 240 into the receiving cavity of the drive component 220, and fit the reset component 240 onto the part of the lock cylinder 230 located in the receiving cavity. Next, install the transmission component 210 into the receiving cavity, aligning the mounting hole on the transmission component 210 with the protrusion on the lock cylinder 230. Fix the transmission component 210 and the lock cylinder 230 with screws. Finally, fit the insulating protective sleeve 250 onto the end of the mechanical lock 200 facing the inside of the circuit breaker to complete the installation of the mechanical lock 200.

[0086] The lock cylinder 230 has an irregularly shaped protrusion facing the base 110. When the transmission component 210 is fixed to the lock cylinder 230, it must first be fitted onto the protrusion and then secured with screws. To ensure the transmission component 210 fits onto the protrusion, it also needs irregularly shaped mounting holes. Therefore, the transmission component 210 must be correctly positioned during installation. To reduce the installation difficulty, a third shaft can be provided on the transmission component 210 for foolproof installation. Correspondingly, a third groove needs to be provided on the drive component 220 to accommodate the third shaft.

Claims

1. A circuit breaker, characterized in that, include: Tripping mechanism; A mechanical lock, comprising a transmission component and a driving component, wherein the transmission component and the driving component are movably connected; A traction rod, which cooperates with the release mechanism, is provided with a traction arm, which is located on the movement path of the drive component; When the transmission component rotates, it can drive the driving component to move towards the traction rod, so that the driving component pushes against the traction arm, thereby enabling the traction rod to cooperate with the tripping mechanism to realize the circuit breaker's opening operation; When the circuit breaker is in the open state, the drive member can abut against the traction arm, preventing the circuit breaker from closing.

2. The circuit breaker according to claim 1, characterized in that, It also includes a housing, which includes a top cover and a base, with the top cover covering the base; The base has an installation space, and the release mechanism and the traction rod are both located within the installation space; The mechanical lock is located on the side wall of the top cover facing the base.

3. The circuit breaker according to claim 2, characterized in that, A guide is provided on the side wall of the top cover facing the base; The guide member has a guide surface on the side facing the base; The drive component is provided with a guide block, which abuts against the guide surface. The guide surface is used to guide the drive component to move toward or away from the traction rod through the guide block.

4. The circuit breaker according to claim 2, characterized in that, The transmission component is provided with a drive shaft, and the drive component is provided with a sliding groove; The drive shaft is located inside the slide groove, and the side wall of the drive shaft is in contact with the groove wall of the slide groove; The drive shaft pushes against the groove wall of the slide when the transmission component rotates, causing the drive component to rotate and move relative to the transmission component.

5. The circuit breaker according to claim 4, characterized in that, The drive shaft includes a first shaft and a second shaft, which are located on opposite sides of the transmission component. The slide includes a first groove and a second groove, which are located on opposite sides of the drive component. The first shaft is located in the first groove, and the second shaft is located in the second groove.

6. The circuit breaker according to claim 5, characterized in that, The mechanical lock also includes a lock cylinder; The drive component is provided with a receiving cavity; The transmission component is located within the receiving cavity, and a portion of the lock cylinder passes through the drive component and is fixedly connected to the transmission component; The lock cylinder can drive the transmission component to rotate under the action of external force.

7. The circuit breaker according to claim 6, characterized in that, The lock cylinder includes a lock hole located at the end of the lock cylinder away from the transmission member, and the lock hole is used for inserting a key. The top cover has an operating hole that penetrates the top cover, and the lock hole is exposed in the operating hole.

8. The circuit breaker according to claim 6, characterized in that, The mechanical lock also includes a reset component; The reset member is located within the receiving cavity, and the reset member includes a first end and a second end that are positioned opposite each other. The first end abuts against the transmission component, and the second end abuts against the inner wall of the driving component; The reset component can drive the drive component to move away from the traction rod.

9. The circuit breaker according to claim 8, characterized in that, The reset element is a spring.

10. The circuit breaker according to any one of claims 1-9, characterized in that, The mechanical lock has an insulating protective sleeve at the end facing the inside of the circuit breaker.

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