Direct-acting driving structure and circuit breaker
By introducing a direct-drive structure with an arc-shaped driven surface and an involute design into the circuit breaker, the problem of unstable torque output is solved, achieving stable torque transmission and precise control of the circuit breaker, thereby improving the reliability and lifespan of the circuit breaker.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHANGHAI LIANGXIN ELECTRICAL CO LTD
- Filing Date
- 2025-03-21
- Publication Date
- 2026-04-17
AI Technical Summary
In existing circuit breakers, the torque output of the electromagnetic actuator is unstable, resulting in inaccurate handle rotation angle, additional stress or wear on mechanical parts, and reduced circuit breaker life and operational reliability.
It adopts a direct-drive structure with an arc-shaped driven surface on the handle. The push rod abuts perpendicularly to the arc-shaped driven surface and pushes the handle to rotate. The lever arm and force direction remain constant. The force transmission is optimized through involute design to reduce friction and wear.
It achieves stable torque output, improves the accuracy of handle rotation and circuit breaker operation precision, extends service life, and enhances the durability and reliability of the equipment.
Smart Images
Figure CN224138108U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of low-voltage electrical technology, and more specifically, to a direct-acting drive structure and circuit breaker. Background Technology
[0002] In a circuit breaker, the moving iron core of the electromagnetic actuator pushes a push rod, which then contacts the handle and applies force, causing the handle to rotate around a fixed point. The rotation of the handle is transmitted to the moving contact via a linkage mechanism, thus achieving the opening or closing action of the moving contact. During this action, the position of the push rod contact point changes, causing a change in the length of the push arm, resulting in unstable output torque and poor operational stability of the drive system. Therefore, in existing technologies, unstable torque output leads to inaccurate handle rotation angles, preventing the moving contact from accurately completing the opening or closing action. Furthermore, unstable torque output subjectes mechanical components to additional stress or wear. Long-term operation may lead to fatigue damage of mechanical components, reducing the overall lifespan of the circuit breaker. Utility Model Content
[0003] The purpose of this application is to provide a direct-acting drive structure and circuit breaker that can prevent lever arm changes, stabilize torque output, and effectively improve the stability of handle rotation.
[0004] The embodiments of this application are implemented as follows:
[0005] On one hand, this application provides a direct-acting drive structure configured in a circuit breaker; the direct-acting drive structure includes a handle and a push rod; the handle is provided with a rotating shaft, the central axis of the rotating shaft being spatially perpendicular to the central axis of the push rod; the handle has an arc-shaped driven surface, the push rod being driven along the central axis of the push rod approaching the arc-shaped driven surface and pushing the handle to move around the rotating shaft; during the movement, the end of the push rod is always perpendicularly abutting against the arc-shaped driven surface.
[0006] As an optional implementation, the projection of the arc-shaped driven surface onto the handle's motion plane forms an involute; the center of the base circle of the involute coincides with the rotation center of the rotating shaft.
[0007] As an optional implementation, the contact portion between the handle and the arc-shaped driven surface is located on the side of the involute closer to the base circle.
[0008] As an optional implementation, the contact portion between the handle and the arc-shaped driven surface is located on the side of the involute away from the base circle.
[0009] As an optional implementation, the top rod is arranged in the same direction as the length of the circuit breaker; or, the top rod is arranged in the same direction as the height of the circuit breaker.
[0010] As an optional implementation, the end of the push rod has a protruding structure, on which an arc-shaped abutment surface is formed, and the center of the arc-shaped abutment surface contacts the arc-shaped driven surface.
[0011] As an optional implementation, the handle includes a rotating part and an operating part; the rotating part is pivotally connected to the rotating shaft, one end of the operating part is connected to the rotating part, and the other end is radially away from the rotating part along the rotating shaft; the arc-shaped driven surface is located on the rotating part.
[0012] Secondly, this application provides a circuit breaker, including a protective housing, a moving contact, and the aforementioned direct-acting drive structure; both the direct-acting drive structure and the moving contact are mounted on the protective housing; wherein, a handle is linked to the moving contact and is used to control the opening and closing of the moving contact.
[0013] As an optional implementation, it also includes a connecting rod and a mechanism seat, one end of the connecting rod being hinged to the handle and the other end being hinged to the mechanism seat; the moving contact is mounted on the mechanism seat.
[0014] As an optional implementation, it also includes an electromagnetic drive module installed inside the protective housing, the electromagnetic drive module being used to drive the top rod to move.
[0015] The beneficial effects of the embodiments of this application include:
[0016] This application provides a direct-acting drive structure configured in a circuit breaker. The direct-acting drive structure includes a handle and a push rod. The handle has a rotating shaft, the central axis of which is spatially perpendicular to the central axis of the push rod. The handle has an arc-shaped driven surface, and the push rod is driven to move along its central axis towards the arc-shaped driven surface. The end of the push rod perpendicularly abuts against the arc-shaped driven surface and pushes the handle to move around the rotating shaft. The circuit breaker provided by this application provides stable torque output. Because of the aforementioned arc-shaped driven surface, the lever arm and direction of the force applied by the push rod to the handle remain constant, thus ensuring the stability of the output torque. Furthermore, the direct-acting drive mechanism provided by this application can precisely control the movement of the moving contact, improving the reliability and safety of the circuit breaker operation.
[0017] This application provides a circuit breaker, including a protective housing, a moving contact, and the aforementioned direct-acting drive structure; both the direct-acting drive structure and the moving contact are mounted on the protective housing; wherein, the handle is linked to the moving contact and is used to control the opening and closing of the moving contact. This application, by optimizing the interaction mechanism between the push rod and the handle, solves the problem of unstable torque output in traditional circuit breakers, significantly improving the operating accuracy and durability of the circuit breaker. Attached Figure Description
[0018] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.
[0019] Figure 1 This is one of the structural schematic diagrams of the direct drive structure in the embodiments of this application;
[0020] Figure 2 This is a second schematic diagram of the direct drive structure according to an embodiment of this application;
[0021] Figure 3 This is the third schematic diagram of the direct drive structure in the embodiments of this application;
[0022] Figure 4 This is the fourth schematic diagram of the direct drive structure in the embodiments of this application;
[0023] Figure 5 This is the fifth schematic diagram of the direct drive structure in the embodiments of this application;
[0024] Figure 6 This is the sixth schematic diagram of the direct drive structure in the embodiments of this application.
[0025] Icons: 100-Handle; 101-Push rod; 102-Rotating shaft; 103-Arc-shaped driven surface; 104-Involute; 105-Length direction; 106-Height direction; 107-Concave structure; 108-Convex structure; 109-Raised structure; 110-Arc-shaped contact surface; 111-Rotating part; 112-Operating part; 113-Protective housing; 114-Moving contact; 115-Connecting rod; 116-Mechanism base; 117-Electromagnetic drive module. Detailed Implementation
[0026] 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, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.
[0027] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.
[0028] It should be noted that similar reference numerals and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures. Furthermore, the terms "first," "second," "third," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.
[0029] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "set up," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.
[0030] In a circuit breaker, the moving iron core of the electromagnetic actuator pushes the push rod 101 to move. The push rod 101 then contacts the handle 100 and applies force, causing the handle 100 to rotate around a fixed point. The rotation of the handle 100 is transmitted to the moving contact 114 through the linkage 115 mechanism, thereby realizing the opening or closing action of the moving contact 114. During the execution of the above actions, the position of the contact point of the push rod 101 changes, causing the length of the push arm to change, resulting in unstable output torque and poor operational stability of the drive structure system. Therefore, in the prior art, the unstable torque output leads to inaccurate rotation angle of the handle 100, thus preventing the moving contact 114 from accurately completing the opening or closing action. In addition, unstable torque output will subject mechanical components to additional stress or wear. Long-term operation may lead to fatigue damage of mechanical components, reducing the overall lifespan of the circuit breaker.
[0031] To address the aforementioned technical problems, embodiments of this application provide a direct-drive structure and a circuit breaker.
[0032] Reference Figure 2As shown, this application embodiment provides a direct-acting drive structure configured in a circuit breaker; the direct-acting drive structure includes a handle 100 and a push rod 101; the handle 100 is provided with a rotating shaft 102, the central axis of the rotating shaft 102 is spatially perpendicular to the central axis of the push rod 101; the handle 100 has an arc-shaped driven surface 103, the push rod 101 is driven to move along the central axis of the push rod 101 close to the arc-shaped driven surface 103, the end of the push rod 101 is perpendicularly abutted against the arc-shaped driven surface 103 and pushes the handle 100 to move around the rotating shaft 102; wherein, during the movement, the push rod 101 and the arc-shaped driven surface 103 remain perpendicular.
[0033] It should be noted that the handle 100 is provided with a rotating shaft 102. Since the central axis of the rotating shaft 102 is perpendicular to the central axis of the push rod 101, the linear motion of the push rod 101 can be converted into the rotational motion of the handle 100, which can effectively improve the transmission efficiency.
[0034] It should be noted that, in this embodiment, an arc-shaped driven surface 103 is provided on the handle 100, and the push rod 101 moves along its central axis and contacts the arc-shaped driven surface 103, so that the end of the push rod 101 can perpendicularly abut against and push the handle 100 to move around the rotating shaft 102. In this way, the direction of the force applied by the push rod 101 to the handle 100 and the length of the lever arm can always remain consistent, avoiding the problems caused by the change in the length of the pushing lever arm in traditional designs. The push rod 101 can be perpendicular to the arc-shaped driven surface 103 on the handle 100, and the distance from the rotating shaft 102 to the push rod 101 can remain consistent.
[0035] The effects that the embodiments of this application can produce are:
[0036] Firstly, the embodiments of this application enable stable torque output. Because the aforementioned arc-shaped driven surface 103 is used, the lever arm and direction of the force applied by the push rod 101 to the handle 100 remain constant, thereby ensuring the stability of the output torque. This not only improves the accuracy of the handle 100's rotation angle but also reduces additional stress or wear caused by torque fluctuations.
[0037] Secondly, the embodiments of this application can extend the service life. The stable torque output of the embodiments of this application reduces unnecessary friction and wear between mechanical components, reduces the risk of fatigue damage to these components due to long-term abnormal stress, and thus extends the overall service life of the circuit breaker.
[0038] Third, the embodiments of this application can precisely control the movement of the moving contact 114. A more stable torque output means that the handle 100 can more accurately control the moving contact 114 to complete the opening or closing action, thereby improving the reliability and safety of the circuit breaker operation.
[0039] Reference Figure 3 , Figure 4 as well as Figure 5 As shown, in one optional implementation, the projection of the arc-shaped driven surface 103 onto the motion plane of the handle 100 forms an involute 104; the center of the base circle of the involute 104 coincides with the rotation center of the rotating shaft 102.
[0040] It should be noted that the involute 104 is defined as the trajectory of any point on a straight line when it rolls purely on a fixed circle. This straight line is also called the generating line, and the fixed circle is also called the base circle.
[0041] It should be noted that, in this embodiment of the application, the projection of the arc-shaped driven surface 103 on the motion plane of the handle 100 forms an involute 104. This means that, during the process of the push rod 101 pushing the handle 100 to rotate, the end of the push rod 101 moves along this involute 104.
[0042] In this embodiment, the base circle of the involute 104 is located on the central axis of the push rod 101, and is also tangent to the base circle of the push rod 101. This layout ensures that the direction of the force exerted by the push rod 101 remains optimal during the pushing process, thereby achieving the most efficient energy transfer.
[0043] It should be explained that the normal of the involute 104 is always tangent to the base circle, and the push rod 101 extends along the normal of the involute 104, thus ensuring that the distance from the push rod 101 to the center of the base circle remains constant. Since the center of the base circle coincides with the center of the rotating shaft 102, the lever arm from the rotating shaft 102 to the push rod 101 remains constant.
[0044] In addition, since the push rod 101 is perpendicular to the arc-shaped driven surface 103, when the end of the push rod 101 slides along the involute 104, the embodiment of this application can not only effectively ensure the stability of the force direction applied by the push rod 101 to the arc-shaped driven surface 103, but also achieve smooth transmission and reduce wear.
[0045] The beneficial effects that the embodiments of this application can produce are as follows:
[0046] The embodiments of this application can improve the efficiency of force transmission. By adopting an involute design 104, the contact point between the push rod 101 and the handle 100 can maintain a constant optimal pressure angle, thereby improving the efficiency of force transmission and reducing energy loss.
[0047] The embodiments of this application can improve the accuracy of operation. Due to the special properties of the involute 104, the push rod 101 can more accurately control the rotation angle of the handle 100 during the pushing process, thereby improving the accuracy of the opening or closing action of the moving contact 114.
[0048] The embodiments of this application enhance the stability of structural operation. The involute 104 design reduces the impact and vibration between the push rod 101 and the arc-shaped driven surface 103, making the operation of the entire drive structure system smoother and enhancing the reliability of the circuit breaker.
[0049] In summary, the embodiments of this application further optimize the drive structure of the circuit breaker by introducing the involute 104 design, which not only improves the force transmission efficiency and action accuracy, but also significantly enhances the durability and operational stability of the equipment.
[0050] Reference Figure 3 , Figure 4 as well as Figure 5 As shown, in one optional implementation, the contact portion between the handle 100 and the arc-shaped driven surface 103 is located on the side of the involute 104 near the base circle.
[0051] It should be noted that the contact portion between the handle 100 and the arc-shaped driven surface 103 is located on the side of the involute 104 closer to the base circle. In this embodiment, the end of the push rod 101 pushes the handle 100 to rotate from the starting portion of the involute 104. When the handle 100 rotates, the end of the push rod 101 slides against the arc-shaped driven surface 103, causing the end of the push rod 101 to gradually move from the starting portion of the involute 104 towards the distal end of the involute 104. This means that the end of the push rod 101 primarily acts on the starting portion of the involute 104 during the pushing process, helping to ensure a more stable and precise direction of force.
[0052] For example, refer to Figure 3 , Figure 4 as well as Figure 5 As shown, a concave structure 107 is formed on the handle 100, and the inner wall surface of the concave structure 107 forms an arc-shaped driven surface 103.
[0053] In this embodiment, a concave structure 107 is formed on the handle 100, and the inner wall surface of the concave structure 107 is the arc-shaped driven surface 103. This design of this embodiment provides a clear contact path for the push rod 101, which helps to distribute pressure and reduce local wear. In addition, since the end of the push rod 101 slides along the involute 104 and the contact point is close to the base circle, the entire system performs better in terms of dynamic response. For example, during rapid opening or closing operations, the action can be completed quickly and smoothly, reducing the impact of shock and vibration on the system.
[0054] The embodiment of this application makes full use of the space of the handle 100 through the design of the concave structure 107, making the overall structure more compact, which is conducive to reducing the overall size of the circuit breaker and facilitating installation and maintenance.
[0055] It should be noted that those skilled in the art may also provide other types of structures on the handle 100 as needed to form an arc-shaped driven surface 103, which is projected as an involute 104 on the rotation plane of the handle 100.
[0056] Unlike the above implementation method, refer to Figure 1 , Figure 6 As shown, the contact portion between the handle 100 and the arc-shaped driven surface 103 is located on the side of the involute 104 away from the base circle. In this embodiment, a convex structure 108 may be formed on the handle 100, and the arc-shaped driven surface 103 is formed on the outer surface of the convex structure 108.
[0057] Reference Figure 2 , Figure 3 as well as Figure 4 As shown, in one optional implementation, the top rod 101 is arranged in the same direction as the length direction 105 of the circuit breaker.
[0058] It should be noted that the push rod 101 is arranged along the length direction 105 of the circuit breaker, which means that the movement trajectory of the push rod 101 is the same as the main extension direction of the circuit breaker. The layout of this embodiment can make full use of the internal space of the circuit breaker, making the overall structure more compact and efficient.
[0059] It should be noted that arranging the push rod 101 along the length direction 105 allows for more efficient use of the internal space of the circuit breaker, avoiding unnecessary space waste and helping to reduce the overall size of the equipment. When the push rod 101 moves along the length direction 105, its movement path is relatively direct, reducing the additional friction or resistance caused by complex geometry, thereby improving the stability and efficiency of operation.
[0060] Unlike the above implementation method, refer to Figure 5 as well as Figure 6 As shown, in this embodiment, the arrangement direction of the push rod 101 is consistent with the height direction 106 of the circuit breaker. A protruding structure 108 can be formed on the handle 100, and an arc-shaped driven surface 103 is formed on the outer surface of the protruding structure 108. When the push rod 101 moves from bottom to top, it can abut against the arc-shaped driven surface 103 on the protruding structure 108, thereby realizing the rotation of the handle 100.
[0061] Reference Figure 4 , Figure 5 As shown, in one optional embodiment, the end of the push rod 101 has a protrusion structure 109, on which an arc-shaped abutment surface 110 is formed, and the center of the arc-shaped abutment surface 110 contacts the arc-shaped driven surface 103.
[0062] For example, the protrusion structure 109 is a hemispherical structure. By setting the protrusion structure 109, the contact area between the end of the push rod 101 and the arc-shaped driven surface 103 can be effectively reduced, thereby reducing friction and avoiding wear of structural components.
[0063] Furthermore, a smooth coating structure can be provided on the arc-shaped contact surface 110 and the arc-shaped driven surface 103 as needed to further reduce friction.
[0064] It should be noted that due to the reduced friction, wear between mechanical parts is also reduced accordingly. This design can significantly extend the service life of circuit breakers, especially for those that are frequently operated. Reducing wear not only extends the lifespan of the equipment but also lowers the cost of routine maintenance and parts replacement.
[0065] Reference Figure 1 , Figure 2 As shown, this application provides a circuit breaker, including a protective housing 113, a moving contact 114, and the aforementioned direct-acting drive structure; both the direct-acting drive structure and the moving contact 114 are mounted on the protective housing 113; wherein, the handle 100 is linked with the moving contact 114 and is used to control the opening and closing of the moving contact 114.
[0066] Among them, reference Figure 5 As shown, the handle 100 includes a rotating part 111 and an operating part 112; the rotating part 111 is pivotally connected to the rotating shaft 102, one end of the operating part 112 is connected to the rotating part 111, and the other end is radially away from the rotating part 111 along the rotating shaft 102; the arc-shaped driven surface 103 is located on the rotating part 111.
[0067] The circuit breaker in this embodiment of the application refers to... Figure 1 As shown, it also includes a connecting rod 115 and a mechanism seat 116. One end of the connecting rod 115 is hinged to the handle 100 and the other end is hinged to the mechanism seat 116; the moving contact 114 is mounted on the mechanism seat 116.
[0068] This application embodiment also includes an electromagnetic drive module 117 installed inside the protective housing 113, which is used to drive the push rod 101 to move.
[0069] It should be noted that those skilled in the art can use other drive modules to control the push rod 101 as needed.
[0070] The circuit breaker provided in this application embodiment enables stable torque output. Due to the use of the aforementioned arc-shaped driven surface 103, the lever arm and direction of the force applied by the push rod 101 to the handle 100 remain constant, thereby ensuring the stability of the output torque. This not only improves the accuracy of the handle 100's rotation angle but also reduces additional stress or wear caused by torque fluctuations. Furthermore, the circuit breaker provided in this application embodiment can precisely control the movement of the moving contact 114, improving the reliability and safety of the circuit breaker's operation.
[0071] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.
Claims
1. A direct drive structure, characterized by, The circuit breaker is configured with a direct-acting drive structure including a handle (100) and a push rod (101). The handle (100) is provided with a rotating shaft (102), and the central axis of the rotating shaft (102) is spatially perpendicular to the central axis of the push rod (101). The handle (100) has an arc-shaped driven surface (103), and the push rod (101) is driven to move along the central axis of the push rod (101) close to the arc-shaped driven surface (103) and push the handle (100) to move around the rotating shaft (102). During the movement, the end of the push rod (101) is always perpendicularly abutting against the arc-shaped driven surface (103).
2. The direct-drive structure according to claim 1, characterized in that, The projection of the arc-shaped driven surface (103) onto the moving plane of the handle (100) forms an involute (104); the center of the base circle of the involute (104) coincides with the rotation center of the rotating shaft (102).
3. The direct drive structure of claim 2, wherein, The contact portion between the handle (100) and the arc-shaped driven surface (103) is located on the side of the involute (104) near the base circle.
4. The direct drive structure of claim 2, wherein The contact portion between the handle (100) and the arc-shaped driven surface (103) is located on the side of the involute (104) away from the base circle.
5. The direct drive structure according to any one of claims 1 to 4, wherein The top rod (101) is arranged in the same direction as the length direction (105) of the circuit breaker; or, the top rod (101) is arranged in the same direction as the height direction (106) of the circuit breaker.
6. The direct drive structure according to any one of claims 1 to 4, wherein The end of the push rod (101) has a protruding structure (109), on which an arc-shaped contact surface (110) is formed, and the center of the arc-shaped contact surface (110) contacts the arc-shaped driven surface (103).
7. The direct drive structure according to any one of claims 1 to 4, wherein The handle (100) includes a rotating part (111) and an operating part (112); the rotating part (111) is pivotally connected to the rotating shaft (102), one end of the operating part (112) is connected to the rotating part (111), and the other end is radially away from the rotating part (111) along the rotating shaft (102); the arc-shaped driven surface (103) is located on the rotating part (111).
8. A circuit breaker, characterized in that, It includes a protective housing (113), a moving contact (114), and a direct-acting drive structure as described in any one of claims 1-7; the direct-acting drive structure and the moving contact (114) are both mounted on the protective housing (113); wherein, the handle (100) is linked with the moving contact (114) and is used to control the opening and closing of the moving contact (114).
9. The circuit breaker of claim 8, wherein, It also includes a connecting rod (115) and a mechanism seat (116), one end of the connecting rod (115) being hinged to the handle (100) and the other end being hinged to the mechanism seat (116); the moving contact (114) is mounted on the mechanism seat (116).
10. The circuit breaker of claim 8, wherein, It also includes an electromagnetic drive module (117) installed inside the protective housing (113), the electromagnetic drive module (117) being used to drive the top rod (101) to move.