A modular low-voltage molded case circuit breaker

Abstract

This utility model relates to the field of circuit breaker technology, specifically a modular low-voltage molded case circuit breaker, including a circuit breaker housing. An operating rod body is installed at the center of the surface of the circuit breaker housing. A control module is bolted to one side of the surface of the circuit breaker housing. A control mechanism is provided on the outside of the operating rod body, and the control mechanism includes a control base plate. Through the coordinated installation of the control module, control mechanism, connecting components, and lifting mechanism outside the circuit breaker housing, a conventional circuit breaker can have remote control functionality by installing accessories. Thus, when it is necessary to reset the position of the operating rod body of the circuit breaker housing, it can be achieved by remotely controlling the extension and retraction of the electric push rod, replacing manual reset and eliminating the risks of climbing to high places, significantly improving the operational efficiency in the process of resetting the operating rod body of the circuit breaker housing.

Description

Technical Field

[0001] This utility model relates to the field of circuit breaker technology, specifically a modular low-voltage molded case circuit breaker. Background Technology

[0002] Low-voltage molded case circuit breakers are key electrical protection devices in low-voltage power distribution systems, primarily used for overload, short-circuit, and leakage current (in some models) fault protection. Their core functions include overload protection, short-circuit protection, leakage current protection (optional), and manual operation. Through precise overload, short-circuit, and leakage current protection, they ensure the safety of equipment and personnel.

[0003] Conventional circuit breakers achieve the overall connection and disconnection of the circuit by opening and closing the electrical components inside the circuit breaker housing via an operating lever. When a sudden circuit break occurs, the operating lever flips over, cutting off the air flow to the electrical components inside the circuit breaker housing. After the external circuit is repaired and found to be normal, the operating lever is pushed up to reset it, restoring the current path to the electrical components inside the circuit breaker housing.

[0004] Currently, conventional circuit breakers do not have an automatic reset function. After tripping, they need to be manually reset after the circuit is repaired. However, there are usually many circuit breakers installed in public areas such as factories and hotels. In addition, they are often installed at high places, and the manual reset process may require the use of climbing tools. As a result, the operation efficiency of the manual reset method of the circuit breaker is low. Therefore, a modular low-voltage molded case circuit breaker is proposed to address the above problems. Utility Model Content

[0005] To address the shortcomings of existing technologies and the problem that circuit breakers installed in public areas such as factories and hotels are often numerous and frequently installed at high locations, requiring climbing tools for manual reset and resulting in low operational efficiency, a modular low-voltage molded case circuit breaker is proposed.

[0006] The technical solution adopted by this utility model to solve its technical problem is as follows: A modular low-voltage molded case circuit breaker of this utility model includes a circuit breaker housing. An operating rod body is installed at the center of the surface of the circuit breaker housing. A control module is bolted to one side of the surface of the circuit breaker housing. A control mechanism is provided outside the operating rod body. The control mechanism includes a control base plate. Slider rails are vertically fixed to the side walls of the control base plate. The slider rails and the control base plate are bolted to the surface of the circuit breaker housing. An electric push rod is vertically installed at the center of the surface of the control base plate via a support plate. The electric push rod and the control module are connected by a wire. A concave protrusion is fixed to one end of the electric push rod. The concave surface of the concave protrusion contacts the control push rod. Both ends of the control push rod are fitted with connecting components via annular slots. The connecting components are linked with the slider rails.

[0007] Preferably, the connecting component includes a rectangular slide frame that slides between the outer walls of the slider track. A linkage bracket is fixedly connected to the top surface of the rectangular slide frame, and the linkage bracket and the annular groove on the outer wall of the control push rod engage with each other.

[0008] Preferably, the inner walls of the two sides of the rectangular sliding frame are symmetrically fixed with lifting mechanisms, and the lifting mechanisms include elastic telescopic rods, both ends of which are vertically fixed with displacement brackets.

[0009] Preferably, a first connecting rod is hinged to each of the two displacement supports, and a second connecting rod is hinged to one end of the first connecting rod.

[0010] Preferably, one end of the second connecting rod is hinged to a positioning bracket, which is fixed to the inner edge of the rectangular sliding frame.

[0011] Preferably, a lifting roller is mounted at the hinge of the first and second connecting rods via a bearing, and the outer wall of the lifting roller can contact the bottom surface of the upper protrusion of the slider track.

[0012] Preferably, a rack is fixed to the top of the slider track.

[0013] Preferably, the inner top surface of the rectangular sliding frame is fixed with a meshing tooth, which meshes with the rack.

[0014] The beneficial effects of this utility model are:

[0015] I. In this utility model, the coordinated installation of the circuit breaker housing external control module, control mechanism, connecting components and lifting mechanism enables a conventional circuit breaker to have remote control functionality through the installation of accessories. Thus, when it is necessary to restore the position of the main body of the operating rod belonging to the circuit breaker housing, it can be achieved through remote control by extending and retracting the electric push rod, replacing manual reset and eliminating the risks of climbing to the top, significantly improving the operational efficiency in the restoration process of the main body of the operating rod belonging to the circuit breaker housing.

[0016] II. In this utility model, since the process of the circuit breaker housing electrical components being disconnected due to the flipping of the main body of the operating lever is sudden and uncontrollable, the linkage between the control mechanism and the connecting components cannot cause obstruction during the automatic downward flipping of the main body of the operating lever. The structure to which the connecting components belong cooperates with the slider track under the action of the lifting mechanism, which allows the elastic telescopic rod to contract during the active flipping of the main body of the operating lever, causing the mating teeth to disengage from the rack. At this time, the control push rod as a whole can be pushed close to the electric push rod to be extended and fit against the concave protrusion, preparing for the subsequent flipping and resetting of the main body of the operating lever. Attached Figure Description

[0017] The accompanying drawings, which are included to provide a further understanding of the present invention and form part of this application, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the present invention and do not constitute an undue limitation thereof. In the drawings:

[0018] Figure 1 This is a perspective view of the present invention;

[0019] Figure 2 This is a perspective view of the external structure of the circuit breaker housing of this utility model;

[0020] Figure 3 This is a perspective view of the connection component and the lifting mechanism working together in this utility model;

[0021] Figure 4 This is a perspective view of the lifting mechanism in this utility model;

[0022] Legend:

[0023] 1. Circuit breaker housing; 11. Operating lever body; 2. Control module; 3. Control mechanism; 31. Control base plate; 32. Slider track; 33. Electric push rod; 34. Concave protrusion; 35. Control push rod; 4. Connecting assembly; 41. Rectangular slide frame; 42. Linkage bracket; 5. Lifting mechanism; 51. Elastic telescopic rod; 52. Displacement bracket; 53. First connecting rod; 54. Second connecting rod; 55. Positioning bracket; 56. Lifting roller; 36. Rack; 43. Engaging teeth. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0025] Specific implementation examples are given below.

[0026] Please see Figure 1 - Figure 4This utility model provides a modular low-voltage molded case circuit breaker, including a circuit breaker housing 1. An operating lever body 11 is installed at the center of the surface of the circuit breaker housing 1. A control module 2 is bolted to one side of the surface of the circuit breaker housing 1. A control mechanism 3 is provided outside the operating lever body 11. The control mechanism 3 includes a control base plate 31. Slider rails 32 are vertically fixed to the side walls of the control base plate 31. The slider rails 32 and the control base plate 31 are bolted to the surface of the circuit breaker housing 1. An electric push rod 33 is vertically installed at the center of the surface of the control base plate 31 via a support plate. The electric push rod 33 and the control module 2 are connected by a wire. A concave protrusion 34 is fixed to one end of the electric push rod 33. The concave surface of the concave protrusion 34 contacts a control push rod 35. Both ends of the control push rod 35 are fitted with connecting components 4 via annular slots. The connecting components 4 are connected to the slider rails 32. In conventional circuit breakers, the control of the circuit breaker housing 1 is achieved by the reciprocating rotation of the operating lever body 11. The control module 2 and control mechanism 3 are externally mounted on the outside of the circuit breaker housing 1 with bolts. The connecting components 4, which are clamped at both ends of the control push rod 35, can cooperate with the slider rail 32, which is installed parallel to the side wall of the control base plate 31, through their respective components. This allows the operating lever body 11 to be reset after the circuit breaker has been broken and repaired. The control mechanism 3, which is electrically connected to the electric push rod 33, can control the electric push rod 33 to expand. One end of the electric push rod 33 is attached to the outer wall of the control push rod 35 through the concave surface of the concave protrusion 34. Then, the control push rod 35 and the connecting components 4 are pushed together to reset the operating lever body 11. After that, the electric push rod 33 returns to the retracted state. At this time, the concave protrusion 34 is disengaged from the outer wall of the control push rod 35.

[0027] like Figure 2 and Figure 3 As shown, the connecting component 4 includes a rectangular slide frame 41, which slides between the outer walls of the slider track 32. A linkage bracket 42 is fixedly connected to the top surface of the rectangular slide frame 41. The linkage bracket 42 and the annular groove on the outer wall of the control push rod 35 engage with each other. Under the action of the connecting component 4, the control push rod 35 is linked with the slider track 32. The rectangular slide frame 41, which is locked to the outside of the control push rod 35 by the linkage bracket 42, slides and is fitted onto the outer wall of the slider track 32, thereby realizing the linkage support function for both ends of the control push rod 35.

[0028] like Figure 3 and Figure 4As shown, lifting mechanisms 5 are symmetrically fixed to the inner walls of both sides of the rectangular sliding frame 41. Each lifting mechanism 5 includes an elastic telescopic rod 51, with displacement brackets 52 vertically fixed to both ends of the elastic telescopic rod 51. A first connecting rod 53 is hinged to each of the two displacement brackets 52. A second connecting rod 54 is hinged to one end of the first connecting rod 53, and a positioning bracket 55 is hinged to one end of the second connecting rod 54. The positioning bracket 55 is fixed to the inner edge of the rectangular sliding frame 41. A lifting roller 56 is mounted at the hinge point of the first connecting rod 53 and the second connecting rod 54 via a bearing. The outer wall of the lifting roller 56 can contact the bottom surface of the upper convex strip of the slider track 32. A rack 36 is fixed to the top of the slider track 32. A meshing tooth 43 is fixed to the top surface of the inner wall of the rectangular sliding frame 41, and the meshing tooth 43 engages with the rack 36. The interlocking lifting mechanism 5 is fixed to the inner wall of the rectangular slide frame 41 via the positioning bracket 55. The positioning brackets 55 on both sides are linked with the displacement brackets 52 at both ends of the elastic telescopic rod 51 in cooperation with the first link 53 and the second link 54. This makes the relative distance between the lifting roller 56 and the top surface of the inner wall of the rectangular slide frame 41 smaller when the elastic telescopic rod 51 contracts, and larger when the elastic telescopic rod 51 expands. Therefore, during the active flipping process of the operating rod body 11, the elastic telescopic rod 51 is driven to contract, causing the meshing teeth 43 to disengage from the rack 36. At this time, the control push rod 35 can be pushed to approach the electric push rod 33 to be expanded and fit against the concave protrusion 34, preparing for the subsequent flipping and reset of the operating rod body 11.

[0029] Working Principle: In conventional circuit breakers, the reciprocating rotation of the operating lever body 11 controls the opening and closing of the electrical components within the circuit breaker housing 1. The control module 2 and control mechanism 3 are externally mounted to the circuit breaker housing 1 via bolts. The connecting components 4, which are snapped onto both ends of the control push rod 35, can interact with the slider rail 32, which is parallel to the side wall of the control base plate 31. This allows the operating lever body 11 to be reset after the circuit breaker has been tripped and repaired. The control mechanism 3, electrically connected to the electric push rod 33, controls the electric push rod 33 to extend. One end of the electric push rod 33, through the concave surface of the concave protrusion 34, fits against the outer wall of the control push rod 35, pushing the control push rod 35 and connecting components 4 together to reset the operating lever body 11. Afterward, the electric push rod 33 returns to its retracted state. At this time, the concave protrusion 34 disengages from the outer wall of the control push rod 35, and the control push rod 35, under the action of the connecting components 4, moves along the slider rail 32. 2. Linkage: The rectangular slide frame 41, which is mounted on the control push rod 35 via the linkage bracket 42, slides on the outer wall of the slider track 32, thus providing linkage support for both ends of the control push rod 35. The lifting mechanism 5 is fixed to the inner wall of the rectangular slide frame 41 via the positioning bracket 55. The positioning brackets 55 on both sides are linked with the displacement brackets 52 at both ends of the elastic telescopic rod 51 in cooperation with the first link 53 and the second link 54. This makes the relative distance between the lifting roller 56 and the top surface of the inner wall of the rectangular slide frame 41 smaller when the elastic telescopic rod 51 contracts, and larger when the elastic telescopic rod 51 expands. Therefore, during the active flipping of the operating rod body 11, the elastic telescopic rod 51 is driven to contract, causing the meshing teeth 43 to disengage from the rack 36. At this time, the control push rod 35 can be pushed close to the electric push rod 33 to be expanded and fit against the concave protrusion 34, preparing for the subsequent flipping and reset of the operating rod body 11.

[0030] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. A modular low-voltage molded case circuit breaker, comprising a circuit breaker housing (1), wherein an operating rod body (11) is mounted at the center of the surface of the circuit breaker housing (1), characterized in that: A control module (2) is bolted to one side of the surface of the circuit breaker housing (1). A control mechanism (3) is provided on the outside of the operating rod body (11). The control mechanism (3) includes a control base plate (31). A slider rail (32) is vertically fixed to the side wall of the control base plate (31). The slider rail (32) and the control base plate (31) are bolted to the surface of the circuit breaker housing (1). An electric push rod (33) is vertically installed at the center of the surface of the control base plate (31) through a support plate. The electric push rod (33) and the control module (2) are connected by a wire. A concave protrusion (34) is fixed to one end of the electric push rod (33). The concave surface of the concave protrusion (34) contacts the control push rod (35). Both ends of the control push rod (35) are fitted with connecting components (4) through annular slots. The connecting components (4) are linked with the slider rail (32).

2. The modular low-voltage molded case circuit breaker according to claim 1, characterized in that: The connecting component (4) includes a rectangular slide frame (41), which slides between the outer walls of the slider track (32). A linkage bracket (42) is fixed to the top surface of the rectangular slide frame (41), and the linkage bracket (42) and the annular groove on the outer wall of the control push rod (35) engage with each other.

3. A modular low-voltage molded case circuit breaker according to claim 2, characterized in that: The inner walls of the rectangular sliding frame (41) are symmetrically fixed with lifting mechanisms (5), the lifting mechanism (5) includes an elastic telescopic rod (51), and both ends of the elastic telescopic rod (51) are vertically fixed with displacement brackets (52).

4. A modular low-voltage molded case circuit breaker according to claim 3, characterized in that: Both displacement supports (52) are hinged with a first connecting rod (53), and one end of the first connecting rod (53) is hinged with a second connecting rod (54).

5. A modular low-voltage molded case circuit breaker according to claim 4, characterized in that: One end of the second link (54) is hinged to a positioning bracket (55), which is fixed to the inner edge of the rectangular slide frame (41).

6. A modular low-voltage molded case circuit breaker according to claim 5, characterized in that: A lifting roller (56) is installed at the hinge of the first link (53) and the second link (54) via a bearing. The outer wall of the lifting roller (56) can contact the bottom surface of the upper protrusion of the slider track (32).

7. A modular low-voltage molded case circuit breaker according to claim 6, characterized in that: A rack (36) is fixed to the top of the slider track (32).

8. A modular low-voltage molded case circuit breaker according to claim 2, characterized in that: The inner top surface of the rectangular sliding frame (41) is fixed with a meshing tooth (43), which meshes with the rack (36).

Images