An operating mechanism and circuit breaker

Abstract

The present application relates to the technical field of low-voltage electrical equipment, and particularly to an operating mechanism and a circuit breaker. The operating mechanism comprises a side plate, an energy storage lever and a connecting rod assembly. The energy storage lever is rotatably arranged on the side plate through an energy storage lever shaft and is located below the connecting rod assembly. The connecting rod assembly is provided with a first limiting structure. The energy storage lever is provided with a second limiting structure. When the operating mechanism is in a tripping energy releasing state or a tripping energy storage state, the first limiting structure and the second limiting structure abut against each other to limit the rotation of the connecting rod assembly. The energy storage lever itself is used to limit and lock the connecting rod assembly in the tripping energy releasing state or the tripping energy storage state, so that the limiting shaft part provided on the side plate is omitted, the operating mechanism is miniaturized, and the positioning accuracy and reliability are improved.

Description

Technical Field

[0001] This invention relates to the field of low-voltage electrical equipment technology, and in particular to an operating mechanism and a circuit breaker. Background Technology

[0002] In existing low-voltage circuit breaker operating mechanisms, the linkage assembly often needs to be maintained in a specific position or limited under different operating states (especially the opening and energy storage states and the energy release opening states) to prevent abnormal contact retraction or overtravel of the mechanism. To limit the linkage assembly, existing technologies typically require additional limiting shafts on the side plates or rely on complex external limiting structures. These additional limiting components not only increase the overall size and assembly complexity of the operating mechanism, but their positions are also easily affected by tolerances, resulting in the linkage assembly being unable to be accurately and reliably locked or limited in both the energy storage and energy release opening states. Therefore, how to utilize the inherent characteristics of the structure to achieve precise limiting of the linkage assembly in different states is a technical problem urgently needing to be solved in this field. Summary of the Invention

[0003] The purpose of this invention is to provide an operating mechanism and a circuit breaker to solve the technical problem that the linkage assembly in the existing operating mechanism needs to rely on the limiting shaft set by the side plate for limiting, which leads to complex structure, large size and limited positioning accuracy.

[0004] In a first aspect, the present invention provides an operating mechanism, comprising: a side plate, an energy storage lever, and a linkage assembly; The energy storage lever is rotatably mounted on the side plate via the energy storage lever shaft and is located below the linkage assembly; The linkage assembly is provided with a first limiting structure; The energy storage lever is provided with a second limiting structure. When the operating mechanism is in the open-release or open-store state, the first limiting structure and the second limiting structure abut against each other to restrict the rotation of the connecting rod assembly.

[0005] In an optional embodiment, the second limiting structure includes a second limiting part disposed on the energy storage lever. When the operating mechanism is in the open-release state, the second link limiting part abuts against the second limiting part to restrict the rotation of the link assembly.

[0006] In an optional embodiment, the first limiting structure includes a first link limiting portion disposed on the link assembly; The second limiting structure includes a first limiting part disposed on the energy storage lever. When the operating mechanism is in the open energy storage state, the first link limiting part abuts against the first limiting part to restrict the rotation of the link assembly.

[0007] In an optional embodiment, the linkage assembly includes an upper linkage and a lower linkage, wherein the upper linkage and the lower linkage are rotatably connected via a linkage hinge axis; The connecting rod hinge shaft forms the first connecting rod limiting part; and / or; The connecting rod hinge shaft forms the second connecting rod limiting part.

[0008] In an optional embodiment, when the connecting rod hinge shaft forms the first connecting rod limiting part, a connecting rod hinge shaft pushing part is provided on the upper side of the energy storage lever, and the connecting rod hinge shaft pushing part forms the first limiting part.

[0009] In an optional embodiment, when the connecting rod hinge shaft forms the second connecting rod limiting part, one end face of the energy storage lever is provided with a connecting rod hinge shaft limiting part, and the connecting rod hinge shaft limiting part forms the second limiting part.

[0010] In an optional embodiment, the energy storage lever includes an energy storage spring drive shaft and at least one energy storage plate; The energy storage lever shaft is connected between the two ends of the energy storage plate; The first limiting part is located at one end of the energy storage plate; The energy storage spring push shaft is connected to one end of the energy storage plate where the first limiting part is provided, and is used to be driven by the energy storage spring to make the energy storage lever rotate, thereby driving the linkage assembly to drive the contact assembly to close the circuit through the rotating shaft assembly.

[0011] In an optional embodiment, the energy storage lever further includes energy storage plate connecting rivets; Along the axial direction of the energy storage lever shaft, there are two energy storage plates spaced apart, and the two energy storage plates are connected by energy storage plate connecting rivets.

[0012] In an optional embodiment, the energy storage lever further includes a cam assembly drive bearing; The cam assembly drive bearing is located at the other end of the energy storage plate away from the first limiting part, and is driven by the cam assembly to rotate the energy storage lever, thereby driving the energy storage spring to compress and store energy.

[0013] In an optional implementation, it also includes a trip lever and a trip latch located below the trip lever; The trip lever is rotatably mounted on the side plate via the trip lever shaft, the jump buckle is rotatably mounted on the side plate via the jump buckle shaft, one end of the connecting rod assembly is hinged to the jump buckle, and the other end of the connecting rod assembly is hinged to the rotating shaft assembly; The jump buckle is provided with a second jump buckle rotation limit part; Furthermore, when the trip lever rotates in the first direction, the second trip lever rotation limiting part can abut against the trip lever, restricting the trip lever from rotating in the first direction.

[0014] Secondly, the present invention provides a circuit breaker including the operating mechanism described in any of the foregoing embodiments.

[0015] Compared with the prior art, the technical advantages of the operating mechanism and circuit breaker provided by the present invention are as follows: The operating mechanism provided by the present invention includes: a side plate, an energy storage lever, and a connecting rod assembly; the energy storage lever is rotatably mounted on the side plate via an energy storage lever shaft and is located below the connecting rod assembly; the connecting rod assembly is provided with a first limiting structure; the energy storage lever is provided with a second limiting structure, wherein when the operating mechanism is in the open-release energy state or the open-store energy state, the first limiting structure and the second limiting structure abut against each other to restrict the rotation of the connecting rod assembly.

[0016] By setting a second limiting structure on the energy storage lever and a first limiting structure on the linkage assembly, the first limiting structure of the linkage assembly can directly abut against the second limiting structure of the energy storage lever when the operating mechanism is in the open / release or open / store state, thereby achieving locking and limiting of the linkage assembly. This structure utilizes the existing feature surface of the energy storage lever itself as the limiting reference, completely eliminating the need for additional limiting shafts or limiting parts on the side plate in the open / release state, as required by existing technologies. This significantly reduces the number of parts and assembly steps in the operating mechanism, facilitating the overall miniaturization and weight reduction of the operating mechanism. Simultaneously, since the limiting reference is directly derived from the feature surface of the energy storage lever itself, it completely avoids the limiting deviation problem caused by the assembly tolerance of the additional limiting shaft on the side plate, providing reliable and stable physical support for the precise locking of the linkage assembly in the open / release state.

[0017] The circuit breaker provided by the present invention includes the above-mentioned operating mechanism. Therefore, the technical advantages and effects achieved by the circuit breaker include those achieved by the above-mentioned operating mechanism, which will not be described in detail here.

[0018] Other features and advantages of the present invention will be described in detail in the following detailed description section. Attached Figure Description

[0019] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0020] Figure 1A schematic diagram of the operating mechanism in the opening and releasing energy state when the trip lever is in a straight line shape, as provided in an embodiment of the present invention; Figure 2 A schematic diagram of the other side of the operating mechanism in the opening and releasing energy state when the opening lever is in a straight line shape, as provided in an embodiment of the present invention; Figure 3 A schematic diagram of the operating mechanism in the opening and releasing energy state when the trip lever is bent, according to an embodiment of the present invention; Figure 4 A schematic diagram of the other side of the operating mechanism in the opening and releasing energy state when the trip lever is bent, as provided in an embodiment of the present invention; Figure 5 A schematic diagram of the operating mechanism in the opening and energy storage state when the opening lever is in a straight line shape, as provided in an embodiment of the present invention; Figure 6 A schematic diagram of the operating mechanism in the opening and energy storage state when the trip lever is bent, according to an embodiment of the present invention; Figure 7 A schematic diagram of the operating mechanism in the closed energy release state when the trip lever is in a straight line shape, as provided in an embodiment of the present invention; Figure 8 A schematic diagram of the operating mechanism in the closing and energy-releasing state when the trip lever is bent, according to an embodiment of the present invention; Figure 9 A schematic diagram of the operating mechanism in the closing energy storage state when the trip lever is in a straight line shape, as provided in an embodiment of the present invention; Figure 10 A schematic diagram of the operating mechanism in the closing energy storage state when the trip lever is bent, according to an embodiment of the present invention; Figure 11 An exploded view of the operating mechanism when the trip lever is linear, as provided in an embodiment of the present invention; Figure 12 An exploded view of the operating mechanism when the trip lever is bent, as provided in an embodiment of the present invention; Figure 13 This is a schematic diagram of the structure of the trip lever when it is linear, as provided in an embodiment of the present invention. Figure 14 A side view of the energy storage lever provided in an embodiment of the present invention; Figure 15 A schematic diagram of the energy storage lever structure provided in an embodiment of the present invention.

[0021] Icons: 1-Cover plate; 2-Break lever; 3-Break lever shaft; 4-First break rotation limit part; 5-First section; 6-Second section; 7-Trigger buckle; 8-Trigger buckle shaft; 9-First trigger buckle rotation limit part; 10-Second trigger buckle rotation limit part; 11-Break rotation limit bearing; 12-Break plate; 13-Break plate connecting rivet; 14-Break half shaft; 15-Third break rotation limit part; 16-Linkage assembly; 17-Upper linkage; 18- 19-Lower connecting rod; 20-Connecting rod hinge shaft; 21-Rotating shaft assembly; 22-Connecting rod stop part; 23-Contact assembly; 24-Energy storage lever; 25-Closing lever; 26-Closing half shaft; 27-Cam assembly; 28-Energy storage lever shaft; 29-Connecting rod hinge shaft push part; 30-Connecting rod hinge shaft limit part; 31-Energy storage spring push shaft; 32-Energy storage plate; 33-Energy storage plate connecting rivet; 34-Cam assembly drive bearing. Detailed Implementation

[0022] The technical solution of the present invention will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for 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 the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0024] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" 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 invention based on the specific circumstances.

[0025] Furthermore, the technical solutions of the various embodiments can be combined with each other, but only if they are feasible for those skilled in the art. If the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0026] The present invention will now be described in further detail with reference to specific embodiments and accompanying drawings.

[0027] The specific structure is as follows: Figures 1 to 15 As shown.

[0028] This embodiment provides an operating mechanism, which includes a side plate, a cover plate 1, and a trip lever 2. The cover plate 1 is located above the side plate, and the trip lever 2 is rotatably mounted on the side plate via a trip lever shaft 3.

[0029] In this embodiment, in order to limit the rotation of the lever 2, an additional limiting shaft can be added to the side plate or the protruding features machined on the side plate can be used for limiting.

[0030] However, to avoid the problems of numerous parts, large size, and poor consistency of positioning references, in the optional technical solution of this embodiment, a first opening rotation limiting part 4 is provided on the side of the opening lever 2 facing the cover plate 1. When the opening lever 2 rotates in the first direction, the first opening rotation limiting part 4 can directly abut against the cover plate 1, thereby limiting the rotation of the opening lever 2 in the first direction. With this solution, this embodiment completely eliminates the requirement of additional limiting shafts on the side plate in the prior art, greatly reducing the number of parts and assembly processes, and enabling a more compact design of the operating mechanism. At the same time, using the large flat surface of the cover plate 1 instead of the single-point shaft hole fit on the side plate as the limiting reference can effectively eliminate the cumulative tolerance caused by the assembly of the external limiting shaft, greatly improving the accuracy and consistency of the positioning position of the opening lever 2 in a specific working state.

[0031] To meet different spatial arrangement or coordination requirements, the trip lever 2 in this embodiment can selectively adopt different physical shape structures. As an optional structure, the trip lever 2 is linear, with the trip lever shaft 3 located at one end of the trip lever 2, and the first trip rotation limiting part 4 located at the end close to the trip lever shaft 3. In this linear structure, when the operating mechanism switches from the closing energy release state to the opening energy release state, and from the closing energy storage state to the opening energy storage state, the first trip rotation limiting part 4 can abut against the cover plate 1 to provide precise hard limit support.

[0032] As an alternative structure, the trip lever 2 is bent and includes a first section 5 and a second section 6. In this case, the trip lever shaft 3 is located at the bend between the first section 5 and the second section 6, and the first trip rotation limiting part 4 is located at the end of the first section 5 near the trip lever shaft 3. With this bent structure, when the operating mechanism switches from the trip energy release state to the trip energy storage state, the first trip rotation limiting part 4 can abut against the cover plate 1. This bent shape causes the center of mass and the point of force application of the lever to shift, which not only provides more space for the downward or other moving parts, but also effectively extends the lever arm and improves the rationality of force application.

[0033] Furthermore, this embodiment also includes a trip latch 7 located below the trip lever 2, which is rotatably mounted on the side plate via a trip latch shaft 8. To maintain the stability of the mechanism's position even without the cover plate 1 providing a limiting function, the trip latch 7 is provided with a first trip latch rotation limiting part 9, and the trip lever 2 is provided with a second trip lever rotation limiting part that cooperates with and limits the first trip latch rotation limiting part 9. When the trip lever 2 is straight, the second trip lever rotation limiting part is located between the two ends of the trip lever 2. When the second trip lever rotation limiting part abuts against the first trip latch rotation limiting part 9, the first trip latch rotation limiting part 9 restricts the trip lever 2 from rotating in a second direction opposite to the first direction, while the second trip lever rotation limiting part restricts the trip latch from rotating in the first direction. Thus, the straight trip lever 2, through this bidirectional limiting logic, effectively ensures that the trip lever 2 does not excessively retract before the energy storage is complete. When the trip lever 2 is bent, the second trip lever rotation limiting part is located at the end of the second segment 6 furthest from the trip lever shaft 3. When the second tripping rotation limiter abuts against the first tripping lever rotation limiter 9, the first tripping lever rotation limiter 9 restricts the tripping lever 2 from rotating in the first direction. Simultaneously, the second tripping rotation limiter restricts the tripping lever 7 from rotating in the first direction, and the first tripping rotation limiter 4 abuts against the cover plate 1. Thus, through this bidirectional limiting logic, the bent tripping lever 2 effectively ensures that it does not excessively retract before the energy storage is complete. The clever use of the tripping lever shaft 3 and the tripping lever 7 as mutual stop references achieves component reuse, further reducing the number of parts. Furthermore, through the mutual limiting between the tripping lever 2 and the tripping lever 7, when the operating mechanism is in the energy storage ready state or the closed locking state, precise locking of the relative position can be achieved through the physical feature surfaces of the two moving parts abutting each other without adding an external limiting shaft, making the mechanism assembly simpler and less costly.

[0034] In this embodiment, the trip lever 7 is further provided with a second trip lever rotation limiting part 10. When the trip lever 2 is straight, after the second trip lever rotation limiting part disengages from the first trip lever rotation limiting part 9 and the trip lever 7 rotates in the first direction, the second trip lever rotation limiting part 10 can abut against the second trip lever rotation limiting part to restrict the rotation of the trip lever 7. When the trip lever 2 is bent, after the second trip lever rotation limiting part disengages from the first trip lever rotation limiting part 9 and the trip lever 7 rotates in the first direction, the second trip lever rotation limiting part 10 can directly abut against the trip lever shaft 3. This solution cleverly utilizes the trip lever shaft 3 as the stop reference for the trip lever 7, realizing part reuse and further reducing the number of parts.

[0035] To ensure the shock resistance and structural stability of the trip lever 2 under long-term high-frequency operation, the trip lever 2 includes a trip rotation limit bearing 11 and at least one trip plate 12. The trip lever shaft 3 is connected to one end of the trip plate 12, and the trip rotation limit bearing 11 is connected to the trip plate 12, forming the aforementioned "second trip rotation limit part". Further, along the axial direction of the trip lever shaft 3, two trip plates 12 are spaced apart, and the two trip plates 12 are fixedly connected by trip plate connecting rivets 13. The trip rotation limit bearing 11 is connected and installed between the two trip plates 12, and is located between the trip lever shaft 3 and the trip plate connecting rivets 13. This sandwich structure, in which the bearing is embedded between two plates, greatly increases the overall rigidity of the trip lever 2, avoiding the problem of bending deformation of a single thin plate under impact, which would affect the limiting accuracy.

[0036] In this embodiment, when the lever 2 is bent, the length of the first segment 5 is greater than the length of the second segment 6. This asymmetrical length design makes the bent structure more in line with the torque distribution law, and the action is smoother when subjected to thrust and reset force, effectively reducing stress concentration at the bend.

[0037] In this embodiment, a tripping half-shaft 14 is also provided on the side plate and located below the cover plate 1. The tripping lever 2 is provided with a third tripping rotation limiting part 15 that cooperates with and limits the tripping half-shaft 14. In order to accommodate the different rotation directions of the straight and bent types, when the tripping lever 2 is straight, the third tripping rotation limiting part 15 is located on the side of the tripping lever 2 facing the cover plate 1 and at the end of the tripping lever 2 away from the tripping lever shaft 3. The third tripping rotation limiting part 15 can abut against the tripping half-shaft 14 to restrict the tripping lever 2 from rotating in the first direction. When the tripping lever 2 is bent, the third tripping rotation limiting part 15 is located on the side of the first segment 5 away from the cover plate 1 and at the end of the first segment 5 away from the tripping lever shaft 3. The third tripping rotation limiting part 15 can abut against the tripping half-shaft 14 to restrict the tripping lever 2 from rotating in the second direction. This locking cooperation in opposite directions perfectly matches the actual movement trajectory of the two levers in the energy storage ready state, ensuring the reliability of the locking.

[0038] This embodiment also includes a tripping reset component. This component provides a reset force after the tripping lever 2 has rotated. When the tripping lever 2 is straight, the reset component provides a force to rotate the lever 2 in a second direction; when the tripping lever 2 is bent, the reset component provides a force to rotate the lever 2 in a first direction. The reset component ensures that the lever can quickly return to its initial standby position after each tripping action.

[0039] Specifically, the tripping reset component can be a torsion spring. This torsion spring is sleeved around the periphery of the tripping lever shaft 3, with its first end fixedly abutting or snapping against the side plate and its second end abutting against the tripping lever 2. When the tripping lever 2 is compressed and rotates, the torsion spring stores torsional energy. When the tripping lever 2 is unlocked and the external force disappears, the torsion spring releases its elastic potential energy to provide a reset torque, driving the tripping lever 2 to accurately reset to its initial position. Since the torsion spring is directly sleeved on the rotating shaft of the tripping lever shaft 3, its structure is extremely compact, fully utilizing the axial space of the tripping lever shaft 3 without occupying any additional lateral or longitudinal dimensions of the operating mechanism, which is very beneficial for overall miniaturization design.

[0040] The tripping reset component can also be a tension spring. One end of the tension spring is hooked onto a pre-set hook post on the side plate, and the other end is hooked onto the end of the tripping lever 2 away from the tripping lever shaft 3 (for example, hooked near the tripping plate connecting rivet 13 or at a pre-drilled hook hole on the tripping plate 12). This configuration relies on the spring's elasticity after extension to pull the tripping lever 2 back to its original position. It is particularly suitable for structural applications with long lever arms and requiring a large initial pulling force to ensure rapid reset.

[0041] This embodiment also includes a linkage assembly 16, a rotating shaft assembly 20, and a linkage stop 21 on the trip latch 7. The linkage assembly 16 includes an upper linkage 17 and a lower linkage 18, which are connected by a linkage hinge shaft 19. The end of the upper linkage 17 away from the lower linkage 18 is hinged to the trip latch 7, and the end of the lower linkage 18 away from the upper linkage 17 is hinged to the rotating shaft assembly 20. When the operating mechanism is in the closed state, the linkage hinge shaft 19 abuts against the linkage stop 21, thereby restricting the relative movement of the upper linkage 17 and the lower linkage 18, keeping the linkage assembly 16 in a near-linear dead-point locked state, and ensuring that the contact assembly 22 stably maintains the closed state.

[0042] This embodiment further imposes geometric constraints on the relative installation positions of the trip lever 2 and the trip buckle 7.

[0043] In this embodiment, the trip lever 2 is arranged laterally. The left side of the trip lever 2 is rotatably mounted on the side plate via the trip lever shaft 3. The right side of the trip lever 2 has a third trip rotation limiting part 15, which can abut against the trip half shaft 14 to restrict the rotation of the trip lever 2 for locking, or separate from the trip half shaft 14 to allow the trip lever 2 to rotate for unlocking. Simultaneously, the trip latch 7 is also arranged laterally below the trip lever 2. The trip latch 7 is rotatably mounted on the side plate via the trip latch shaft 8. The left side of the trip latch 7 has a first trip latch rotation limiting part 9. The trip lever 2 has a second trip rotation limiting part. The first trip latch rotation limiting part 9 can abut against the second trip rotation limiting part to restrict the trip latch 7 to rotate in a first direction for locking, or separate from the second trip rotation limiting part to allow the trip latch 7 to rotate in the first direction for unlocking. The right side of the trip latch 7 is hinged to the connecting rod assembly 16.

[0044] When the operating mechanism is in the open-release state, the trip lever 7 is in a lateral position. Based on the above lateral layout, the line connecting the axis of the open lever shaft 3 and the axis of the open half shaft 14 is defined as the first connecting line; the connection between the first trip lever rotation limit part 9 and the hinge point between the trip lever 7 and the connecting rod assembly 16 is defined as the second connecting line. Specifically, when the open lever 2 is straight, the line connecting the first trip lever rotation limit part 9 and the hinge point between the trip lever 7 and the connecting rod assembly 16 is the second connecting line; when the open lever 2 is bent, the line connecting the first trip lever rotation limit part 9, the trip lever shaft 8, and the hinge point between the trip lever 7 and the connecting rod assembly 16 is the second connecting line. As a specific implementation of this embodiment, the included angle between the first connecting line and the second connecting line is an acute angle, and further, the included angle is less than 45°. Furthermore, the angle between the line connecting the axis of the trip lever shaft 3 and the axis of the trip half shaft 14 and the horizontal direction is less than 30°, and the angle between the line connecting the first trip lever rotation limit part 9 and the hinge point of the trip lever 7 and the connecting rod assembly 16 and the horizontal direction is also less than 30°. By setting the above angles within a small acute angle range or even less than 30°, the latching direction between the trip lever 2 and the trip lever 7 can be made as close to the horizontal direction as possible in the spatial arrangement of the mechanism, thereby making full use of the space of the operating mechanism in the lateral direction and significantly increasing the latching lever arm between the trip lever 2 and the trip lever 7. Due to the significant extension of the lever arm, the torque required to overcome the half shaft unlocking when the mechanism performs closing or opening actions is greatly reduced, which helps to reduce the stress level of the overall operating mechanism and greatly compresses the space occupied by the mechanism in the vertical height direction, providing a prerequisite for achieving the ultimate miniaturization of the operating mechanism.

[0045] Furthermore, this embodiment also sets a length ratio between the first connecting line and the second connecting line. Specifically, the length ratio of the first connecting line to the second connecting line is set between 0.5 and 2. Setting this length ratio within the range of 0.5-2 ensures that the trip lever 2 and the trip latch 7 have sufficient overlapping lever arms to effectively reduce the unlocking torque, while effectively balancing the projected lengths of both in the horizontal direction. This reasonable ratio avoids the problem of a sudden increase in unlocking torque due to an excessively short lever arm, and also avoids the problem of the operating mechanism occupying too much space in the horizontal direction due to an excessively long lever arm, thus achieving a good balance between unlocking performance and space compactness.

[0046] When the trip lever 2 is in a straight line, the trip lever shaft 3 is located at the left end of the trip lever 2, the third trip rotation limit part 15 is located at the upper right end of the trip lever 2, and the second trip rotation limit part (formed by the trip rotation limit bearing 11) is located between the two ends of the trip lever 2. At this time, the first connecting line extends roughly in the horizontal direction, and the second connecting line will necessarily form the aforementioned acute angle relationship with it according to the actual arrangement. In this straight line structure, the trip latch 7 is also provided with a second trip latch rotation limit part 10; when the trip latch 7 rotates in the first direction, the second trip latch rotation limit part 10 can abut against the second trip rotation limit part (trip rotation limit bearing 11) located between the two ends of the trip lever 2, thereby further preventing the trip latch 7 from excessively overtraveling in the first direction after unlocking.

[0047] When the trip lever 2 is bent and includes a first segment 5 and a second segment 6, the trip lever shaft 3 is located at the bend between the first segment 5 and the second segment 6. The third trip rotation limiting part 15 is located at the upper right end of the first segment 5, and the second trip rotation limiting part (formed by the trip rotation limiting bearing 11) is located in the second segment 6. In this bent structure, due to the bending of the lever shape, the spatial relative angle between the first connecting line and the second connecting line is still maintained within the acute angle range as defined above. Similarly, the trip buckle 7 in the bent structure is also provided with a second trip buckle rotation limiting part 10. When the trip buckle 7 rotates in the first direction, the second trip buckle rotation limiting part 10 can directly abut against the trip lever shaft 3, using the original axis of the mechanism as a stop reference to restrict the rotation of the trip buckle 7 in the first direction, further simplifying the use of additional limiting parts.

[0048] When the operating mechanism is in the energy-storage ready state or the closed-lock state, the extended lever arm formed by this geometric angle relationship indirectly assists in the stability of the locking relationship between the trip latch 7 and the trip lever 2. When an external command drives the trip half shaft 14 to rotate and releases the lock on the trip lever 2, the latching characteristics and geometric angle relationship between the trip lever 2 and the trip latch 7 allow them to separate smoothly with minimal unlocking torque.

[0049] In this embodiment, the linkage assembly 16 is provided with a first limiting structure; the energy storage lever 23 is provided with a second limiting structure. When the operating mechanism is in the open-release or open-store energy state, the first limiting structure and the second limiting structure abut against each other to restrict the rotation of the linkage assembly 16. Specifically, in the open-store energy state, in order to ensure that the linkage assembly 16 can be securely locked, the linkage assembly 16 is provided with a first link limiting part, and the energy storage lever 23 is provided with a first limiting part. When the operating mechanism is in the open-store energy state, the first link limiting part abuts against each other, thereby restricting the rotation of the linkage assembly 16. By locking the linkage assembly 16 through the feature face of the energy storage lever 23 itself, the limiting shaft parts that need to be additionally set on the side plate in the prior art are eliminated, making the operating mechanism structure more compact and smaller in size, and effectively ensuring the locking accuracy of the linkage assembly 16 in the open-store energy position.

[0050] Specifically, the connecting rod hinge shaft 19 forms the aforementioned first connecting rod limiting portion; while the upper end face or integrally formed protrusion of the energy storage lever 23 forms the connecting rod hinge shaft pushing portion 29, which forms the aforementioned first limiting portion. In the open energy storage state, the connecting rod hinge shaft 19 accurately sits on and abuts against the connecting rod hinge shaft pushing portion 29, ensuring that the connecting rod assembly 16 does not loosen. Simultaneously, the connecting rod assembly 16 is also provided with a second connecting rod limiting portion, and the energy storage lever 23 is provided with a second limiting portion. When the operating mechanism is in the open energy release state, the second connecting rod limiting portion abuts against the second limiting portion to restrict the rotation of the connecting rod assembly 16. Specifically, one end face of the energy storage lever 23 is provided with a connecting rod hinge shaft limiting portion 30, which forms the aforementioned second limiting portion; while the connecting rod hinge shaft 19 forms the aforementioned second connecting rod limiting portion. At the end of the energy release tripping action, the connecting rod hinge shaft 19 falls to the connecting rod hinge shaft limit part 30. At this time, the connecting rod hinge shaft limit part 30 abuts against the connecting rod hinge shaft 19, which effectively prevents the contact assembly 22 from abnormally falling back due to its own weight or spring residual force after the tripping is in place, and greatly improves the reliability of the operating mechanism tripping.

[0051] In this embodiment, the energy storage lever 23 includes an energy storage spring push shaft 31 and at least one energy storage plate 32. The energy storage lever shaft 28 is connected between the two ends of the energy storage plate 32; and the aforementioned connecting rod hinge shaft push part 29 (i.e., the first limiting part) is located at one end (right end) of the energy storage plate 32. The energy storage spring push shaft 31 is also connected to the end of the energy storage plate 32 where the connecting rod hinge shaft push part 29 is provided. During the closing action, the energy storage spring releases energy, directly pushing the energy storage spring push shaft 31, causing the energy storage lever 23 to rotate around the energy storage lever shaft 28. When the right end of the energy storage lever 23 rotates upward, the connecting rod hinge shaft push part 29 on it pushes the connecting rod hinge shaft 19, driving the connecting rod assembly 16 to move rapidly in the closing direction, and finally driving the moving contact and stationary contact of the contact assembly 22 to close through the rotating shaft assembly 20. This structure, which places the energy storage spring push shaft 31 and the first limiting part at the same end of the energy storage plate 32, makes full use of the rotational torque, making the transmission of closing energy more direct and more efficient.

[0052] In terms of the physical structure of the energy storage lever 23, to enhance its structural rigidity under long-term high-frequency impact, two energy storage plates 32 are spaced apart along the axial direction of the energy storage lever shaft 28, and the two energy storage plates 32 are fixedly connected by energy storage plate connecting rivets 33. This double-plate clamping riveting structure makes the overall load on the energy storage lever 23 more uniform, avoiding the problem of force skew on a single plate, and significantly improving the fatigue life of the energy storage lever 23 under high load mode. In addition, the energy storage lever 23 also includes a cam assembly drive bearing 34. This cam assembly drive bearing 34 is located at the other end (left end) of the energy storage plate 32 away from the connecting rod hinge shaft push part 29. During the energy storage process, the cam assembly drive bearing 34 is driven by the cam assembly 26, that is, the contour surface of the cam assembly 26 pushes the cam assembly drive bearing 34, causing the energy storage lever 23 to rotate and compress the energy storage spring to complete the energy storage. Through the reasonable distribution of functional components at both ends of the energy storage lever 23, the energy storage lever 23 is subjected to balanced force during energy storage and release, effectively improving the overall smoothness of the operation mechanism.

[0053] It should be noted that the first link limiting part and the first limiting part are not limited to being composed of the link hinge shaft 19 and the link hinge shaft pushing part 29. A limiting boss or limiting post can be integrally formed or additionally fixed on the plate surface of the upper link 17 or the lower link 18, and the limiting boss or limiting post can constitute the aforementioned first link limiting part. Correspondingly, a positioning groove or mating block can be provided at the corresponding position on the energy storage lever 23, and the positioning groove or mating block constitutes the aforementioned first limiting part. When the operating mechanism is in the open energy storage state, the limiting boss or limiting post on the link assembly 16 falls into or abuts against the positioning groove or mating block on the energy storage lever 23, which can also play the role of firmly limiting the rotation of the link assembly 16, and can eliminate the need for additional limiting shaft parts. Similarly, if the limiting boss is replaced with a horizontal shaft that passes between the two energy storage plates 32 and is fixed on the energy storage lever 23, the horizontal shaft can also serve as an alternative to the first limiting part; and the connecting rod hinge shaft 19 on the connecting rod assembly 16 or the newly set abutting block can serve as the first connecting rod limiting part and abut against the horizontal shaft.

[0054] It should be noted that the second link limiting part and the second limiting part are not limited to being composed of the link hinge shaft 19 and the link hinge shaft limiting part 30. An auxiliary limiting pin can be provided on the link assembly 16, which forms the second link limiting part. The energy storage lever 23 can be provided with a retaining groove or a stop block, which forms the second limiting part. When the operating mechanism moves to its end in the open release state, the auxiliary limiting pin will fall into the retaining groove or be stopped by the stop block, thereby preventing the contacts from falling back.

[0055] The following will describe in detail the four working states and complete motion process of this operating mechanism in actual operation: Opening and releasing state: The energy storage spring mounted on the spring bracket 27 is in the released state, the opening half shaft 14 does not lock the opening lever 2, and the closing half shaft 25 does not lock the closing lever 24. At this time, for the linear opening lever 2, its first opening rotation limit part 4 does not contact the cover plate 1; for the bent opening lever 2, the first opening rotation limit part 4 does not contact the cover plate 1. The trip latch 7 is in the free disengaged state and does not latch with the opening lever 2. The upper connecting rod 17 and the lower connecting rod 18 in the connecting rod assembly 16 are in a non-linear state, and the connecting rod hinge shaft 19 is reliably resting on the connecting rod hinge shaft limit part 30 on the right side of the energy storage lever 23. At this time, the rotating shaft assembly 20 drives the contact assembly 22 to the open position.

[0056] Opening and energy storage state: In the opening and energy release state, the cam assembly 26 is rotated manually or electrically, causing the energy storage lever 23 to compress the energy storage spring to complete energy storage, and the closing lever 24 and the closing half shaft 25 are locked again. During this process, the connecting rod hinge shaft 19 moves to the connecting rod hinge shaft push part 29 on the upper side of the energy storage lever 23 as the energy storage lever 23 rotates, while the rotating shaft assembly 20 and the contact assembly 22 remain stationary.

[0057] Closing and releasing energy: In the opening and storing energy state, the closing button drives the closing half-shaft 25 to rotate, releasing the closing lever 24. The energy storage spring releases energy, quickly pushing the energy storage lever 23 upward. The energy storage lever 23, through its connecting rod hinge shaft pusher 29, pushes the connecting rod hinge shaft 19, causing the connecting rod assembly 16 to move rapidly, transmitting the motion to the rotating shaft assembly 20, and finally causing the moving contact of the contact assembly 22 to move towards the stationary contact to close, so that the contact assembly 22 is in the closed position. During this process, the opening lever 2 and the trip button 7 remain basically stationary. When the closing is in place, the connecting rod hinge shaft 19 abuts against the connecting rod stop 21 on the trip button 7, locking the relative position of the upper connecting rod 17 and the lower connecting rod 18, and the contact assembly 22 is stably held in the closed state. At this time, the tripping half shaft 14 abuts and locks against the third tripping rotation limit part 15 of the tripping lever 2: when it is straight, it restricts the tripping lever 2 from rotating in the first direction; when it is bent, it restricts the tripping lever 2 from rotating in the second direction. At the same time, the trip latch 7 forms an overlapping lock with the tripping lever 2.

[0058] Closing and Energy Storage State: In the closing and energy release state, the circuit breaker's contact assembly 22 remains closed. At this time, manual or electric operation again rotates the cam assembly 26, further compressing the energy storage spring to complete energy storage. Simultaneously, the closing half-shaft 25 and the closing lever 24 are locked together. During this energy storage process, the positions of the opening lever 2, trip latch 7, connecting rod assembly 16, and rotating shaft assembly 20 remain unchanged, and the operating mechanism is in a standby state ready to perform the opening action at any time.

[0059] When the tripping action is performed, an external command drives the tripping half-shaft 14 to rotate, causing the arc-shaped feature surface of the tripping half-shaft 14 to separate from the third tripping rotation limit part 15 of the tripping lever 2, thus unlocking the tripping lever 2. The tripping lever 2 then rotates (the linear type rotates in the first direction, and the bent type rotates in the second direction), and the second tripping rotation limit part formed by the tripping rotation limit bearing 11 on it disengages from the first tripping rotation limit part 9 of the tripping latch 7, unlocking the tripping latch 7, which then rotates in the first direction. Immediately afterwards, the constraint of the connecting rod assembly 16 is released, and the rotating shaft assembly 20 rotates towards the tripping position under the action of other external forces (such as the contact spring reaction force or the load's own reaction force), and the moving contact quickly separates from the stationary contact.

[0060] During this process, when the trip lever 2 is in a straight line, it rotates until it is stopped by the limiting shaft additionally installed on the cover plate 1 or the corresponding side plate, or by using the protruding features machined on the side plate, and then it will rotate back to its original position. The second trip lever rotation limiting part 10 can abut against the second trip rotation limiting part (abutting means the second trip lever rotation limiting part 10 is briefly blocked by the second trip rotation limiting part), and then the trip lever 7 will rotate back to its original position. When the trip lever 2 is in a bent line, the second trip lever rotation limiting part 10 can directly abut against the trip lever shaft 3 (abutting means the second trip lever rotation limiting part 10 is briefly blocked by the trip lever shaft 3), and then the trip lever 7 will rotate back to its original position. At the end of this process, the connecting rod hinge shaft 19 returns to the connecting rod hinge shaft push part 29 on the upper side of the energy storage lever 23. At this point, the operating mechanism completes the tripping and returns to the tripping and energy storage state, awaiting the next closing action.

[0061] The circuit breaker provided in this embodiment includes the above-mentioned operating mechanism. Therefore, the technical advantages and effects achieved by the circuit breaker include the technical advantages and effects achieved by the above-mentioned operating mechanism, which will not be repeated here.

[0062] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. An operating mechanism, characterized in that, include: Side plate, energy storage lever (23) and linkage assembly (16); The energy storage lever (23) is rotatably mounted on the side plate via the energy storage lever shaft (28) and is located below the connecting rod assembly (16); The link assembly (16) is provided with a first limiting structure; The energy storage lever (23) is provided with a second limiting structure. When the operating mechanism is in the open-release state or the open-store state, the first limiting structure and the second limiting structure resist each other to restrict the rotation of the connecting rod assembly (16).

2. The operating mechanism according to claim 1, characterized in that, The first limiting structure includes a second link limiting part disposed on the link assembly (16); The second limiting structure includes a second limiting part disposed on the energy storage lever (23). When the operating mechanism is in the open-circuit energy release state, the second link limiting part abuts against the second limiting part to restrict the rotation of the link assembly (16).

3. The operating mechanism according to claim 2, characterized in that, The first limiting structure includes a first link limiting part disposed on the link assembly (16); The second limiting structure includes a first limiting part disposed on the energy storage lever (23). When the operating mechanism is in the open energy storage state, the first link limiting part abuts against the first limiting part to restrict the rotation of the link assembly (16).

4. The operating mechanism according to claim 3, characterized in that, The linkage assembly (16) includes an upper linkage (17) and a lower linkage (18), and the upper linkage (17) and the lower linkage (18) are rotatably connected by a linkage hinge shaft (19). The connecting rod hinge shaft (19) forms the first connecting rod limiting part; and / or; The connecting rod hinge shaft (19) forms the second connecting rod limiting part.

5. The operating mechanism according to claim 4, characterized in that, When the connecting rod hinge shaft (19) forms the first connecting rod limiting part, the upper side of the energy storage lever (23) is provided with a connecting rod hinge shaft pushing part (29), and the connecting rod hinge shaft pushing part (29) forms the first limiting part.

6. The operating mechanism according to claim 4, characterized in that, When the connecting rod hinge shaft (19) forms the second connecting rod limiting part, one end face of the energy storage lever (23) is provided with a connecting rod hinge shaft limiting part (30), and the connecting rod hinge shaft limiting part (30) forms the second limiting part.

7. The operating mechanism according to claim 3, characterized in that, The energy storage lever (23) includes an energy storage spring drive shaft (31) and at least one energy storage plate (32). The energy storage lever shaft (28) is connected between the two ends of the energy storage plate (32); The first limiting part is located at one end of the energy storage plate (32); The energy storage spring push shaft (31) is connected to one end of the energy storage plate (32) where the first limiting part is provided, and is used to be driven by the energy storage spring to make the energy storage lever (23) rotate, and drive the connecting rod assembly (16) to drive the contact assembly (22) to close the circuit through the rotating shaft assembly (20).

8. The operating mechanism according to claim 7, characterized in that, The energy storage lever (23) also includes an energy storage plate connecting rivet (33). Along the axial direction of the energy storage lever shaft (28), there are two energy storage plates (32) spaced apart, and the two energy storage plates (32) are connected by energy storage plate connecting rivets (33).

9. The operating mechanism according to claim 7, characterized in that, The energy storage lever (23) also includes a cam assembly drive bearing (34). The cam assembly drive bearing (34) is located at the other end of the energy storage plate (32) away from the first limiting part, and is driven by the cam assembly (26) to rotate the energy storage lever (23) and drive the energy storage spring to compress and store energy.

10. The operating mechanism according to any one of claims 1 to 9, characterized in that, It also includes a trip lever (2) and a trip button (7) located below the trip lever (2); The trip lever (2) is rotatably mounted on the side plate via the trip lever shaft (3), the jump buckle (7) is rotatably mounted on the side plate via the jump buckle shaft (8), one end of the connecting rod assembly (16) is hinged to the jump buckle (7), and the other end of the connecting rod assembly (16) is hinged to the rotating shaft assembly (20). The jump buckle (7) is provided with a second jump buckle rotation limit part (10); Furthermore, when the trip lever (7) rotates in the first direction, the second trip lever rotation limiter (10) can abut against the trip lever (2) to restrict the trip lever (7) from rotating in the first direction.

11. A circuit breaker, characterized in that, Includes the operating mechanism described in any one of claims 1-10.

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