Operating mechanism and low voltage switch
By simplifying the design of the transmission components and non-collinearly arranged contact and rotating parts, the breaking performance problem of the frame circuit breaker under high voltage and high current conditions is solved, achieving fast response and efficient energy transfer, and improving the reliability and stability 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
- 2025-06-20
- Publication Date
- 2026-07-21
AI Technical Summary
The existing frame circuit breaker has a complex operating mechanism, long transmission path, and slow response speed, which makes it difficult to meet the breaking performance requirements under high voltage and high current conditions, and its reliability is easily affected by assembly errors or wear.
The simplified transmission component design, including the trip shaft and transmission components, improves the flexibility and energy transfer efficiency of the mechanical transmission by non-collinear arrangement of the contact part and the rotating part, simplifies the structural design and improves the response speed.
It improves the breaking capacity and operational stability of the frame low-voltage switch, meets the actual needs under high voltage and high current conditions, and enhances the stability and reliability of the operating mechanism.
Smart Images
Figure CN224537023U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of electrical equipment technology, and more specifically, to an operating mechanism and a low-voltage switch. Background Technology
[0002] In the field of low-voltage electrical appliances, frame circuit breakers, as core protection devices in power distribution systems, are widely used in the main switching positions on the power supply side, playing a crucial role in protecting circuits from overload, short circuits, and other faults. With the continuous improvement of power system voltage levels, higher requirements are placed on the breaking capacity of frame circuit breakers. Breaking capacity not only determines whether the circuit breaker can reliably interrupt current under fault conditions, but also directly affects the safety and stability of the entire power distribution system.
[0003] Currently, existing frame circuit breakers typically employ complex mechanical operating mechanisms to achieve rapid contact breaking. However, these mechanisms generally suffer from problems such as complex structure, long transmission paths, and slow response speeds, making it difficult to meet actual breaking performance requirements under high voltage and high current conditions. Furthermore, traditional operating mechanisms require high precision in the coordination of various transmission components, making them prone to inflexible operation due to assembly errors or wear, thus affecting the overall reliability of the circuit breaker. Utility Model Content
[0004] The purpose of this invention is to provide an operating mechanism and a low-voltage switch, which have a simplified structure, high transmission efficiency and fast response speed, thereby improving the overall reliability and stability of the low-voltage switch.
[0005] The embodiments of this utility model are implemented as follows:
[0006] In a first aspect, this utility model provides an operating mechanism, comprising:
[0007] case;
[0008] A transmission assembly, disposed in the housing, and used for transmission connection with the contact assembly;
[0009] A trip shaft is movably disposed in the housing. The trip shaft includes a rotating part and an abutting part. The abutting part is connected to the rotating part. The rotating part is rotatably disposed in the housing. The abutting part is in transmission cooperation with the transmission assembly. The axis of the abutting part is not collinear with the axis of the rotating part.
[0010] The transmission assembly moves under the drive of the contact assembly to drive the trip shaft to rotate around the axis of the rotating part, thereby causing the operating mechanism to trip.
[0011] In an optional embodiment, the two ends of the abutting part are respectively connected to the rotating part, and the rotation axis of the abutting part is parallel to and not collinear with the rotation axis of the rotating part.
[0012] In an optional embodiment, the abutment portion is a columnar structure comprising a combination of curved and planar surfaces.
[0013] In an optional embodiment, the transmission assembly includes a first transmission member, a second transmission member, a rotating shaft, and an elastic member. The first transmission member and the second transmission member are rotatably disposed on the rotating shaft, which is rotatably disposed on the housing. The elastic member is disposed between the first transmission member and the second transmission member. The first transmission member is used to abut against the abutting portion, and the second transmission member is used to compress the elastic member against the abutting portion under the drive of the contact assembly, so as to drive the tripping shaft to rotate.
[0014] In an optional embodiment, the second transmission member has a protrusion for abutting against the abutting portion.
[0015] In an optional embodiment, the transmission assembly further includes a mounting base disposed on the second transmission member. The mounting base has a first limiting portion protruding from it, and the first transmission member has a second limiting portion protruding from it. One end of the elastic member is sleeved on the first limiting portion, and the other end is sleeved on the second limiting portion.
[0016] In an optional embodiment, the transmission assembly further includes a limiting member disposed on the second transmission member, the limiting member being used to abut against the first transmission member, and the limiting member and the elastic member being located on opposite sides of the first transmission member.
[0017] In an optional embodiment, there are two second transmission components, which are respectively disposed on both sides of the first transmission component and connected by the limiting component.
[0018] In an optional embodiment, the first transmission member includes a first connecting part, a second connecting part, and a third connecting part connected in sequence. The end of the first connecting part is rotatably disposed on the rotating shaft. The two ends of the second connecting part are respectively connected at an angle to the first connecting part and the second connecting part. The limiting member is used to abut against the first connecting part, and the elastic member abuts against the third connecting part.
[0019] Secondly, this utility model provides a low-voltage switch, including a contact assembly and an operating mechanism as described in any of the foregoing embodiments, wherein the contact assembly is tractively connected to the transmission assembly.
[0020] The beneficial effects of the operating mechanism and low-voltage switch provided in this utility model embodiment include: when a short circuit or other fault occurs in the circuit system, the moving contact in the contact assembly is repulsed and separates from the stationary contact, driving the transmission assembly to move synchronously. This causes the trip shaft to rotate around the axis of the rotating part through the abutment part, and the operating mechanism is tripped through the rotating part, ultimately ensuring that the moving contact assembly is in the open state. Furthermore, because the axis of the abutment part and the axis of the rotating part are not collinear, that is, on a plane perpendicular to the axis of the abutment part and the axis of the rotating part, the projection center of the abutment part and the projection center of the rotating part are eccentrically set, thereby improving the flexibility of mechanical transmission and energy transfer efficiency. It also simplifies the structural design of the trip shaft, improves its operating accuracy and response speed, and thus enhances the stability and reliability of the operating mechanism. Attached Figure Description
[0021] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.
[0022] Figure 1 This is a schematic diagram of a low-voltage switch structure provided in an embodiment of the present invention;
[0023] Figure 2 Provided for the embodiments of this utility model Figure 1 Cross-sectional view of medium and low voltage switch in closed state (AA);
[0024] Figure 3 Provided for the embodiments of this utility model Figure 1 Cross-sectional view of medium and low voltage switch in open state (AA);
[0025] Figure 4 Provided for the embodiments of this utility model Figure 2 Enlarged view of section B of the medium and low voltage switch;
[0026] Figure 5 This is a schematic diagram of the transmission component structure provided in an embodiment of the present utility model;
[0027] Figure 6 This is a schematic cross-sectional view of the transmission assembly provided in an embodiment of the present utility model;
[0028] Figure 7 This is a schematic diagram of the release shaft structure provided in an embodiment of the present utility model.
[0029] Icons: 1-Low-voltage switch; 10-Operating mechanism; 100-Housing; 200-Transmission assembly; 210-First transmission component; 211-Second limiting part; 212-First connecting part; 213-Second connecting part; 214-Third connecting part; 220-Second transmission component; 221-Protrusion; 230-Rotating shaft; 240-Elastic component; 250-Mounting base; 251-First limiting part; 260-Limiting component; 270-Busket; 280-Lever; 290-First shaft; 291-Second shaft; 300-Trigger shaft; 310-Rotating part; 320-Abutting part; 330-Triggering part; 20-Contact assembly; 21-Moving contact; 22-Stationary contact. Detailed Implementation
[0030] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.
[0031] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.
[0032] It should be noted that similar labels 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.
[0033] In the description of this utility model, 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, or the orientation or positional relationship commonly used when the product of this utility model is in use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.
[0034] Furthermore, terms such as "horizontal" and "vertical" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.
[0035] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "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 utility model based on the specific circumstances.
[0036] In the field of low-voltage electrical appliances, frame circuit breakers, as core protection devices in power distribution systems, are widely used in the main switching positions on the power supply side, playing a crucial role in protecting circuits from overload, short circuits, and other faults. With the continuous improvement of power system voltage levels, higher requirements are placed on the breaking capacity of frame circuit breakers. Breaking capacity not only determines whether the circuit breaker can reliably interrupt current under fault conditions, but also directly affects the safety and stability of the entire power distribution system.
[0037] Currently, existing frame circuit breakers typically employ complex mechanical operating mechanisms to achieve rapid contact breaking. However, these mechanisms generally suffer from problems such as complex structure, long transmission paths, and slow response speeds, making it difficult to meet actual breaking performance requirements under high voltage and high current conditions. Furthermore, traditional operating mechanisms require high precision in the coordination of various transmission components, making them prone to inflexible operation due to assembly errors or wear, thus affecting the overall reliability of the circuit breaker.
[0038] Based on the problems existing in the current technology, please refer to Figures 1 to 7 This utility model provides a low-voltage switch 1, which is applied in the field of low-voltage electrical equipment, and is especially suitable for frame-type disconnect switches.
[0039] In this embodiment, the low-voltage switch 1 includes an operating mechanism 10, a contact assembly 20, and a tripping mechanism. The contact assembly 20 is driveably connected to the transmission assembly 200, and the tripping mechanism is driveably connected to the tripping shaft 300 of the operating mechanism 10. The tripping mechanism is also driveably connected to the contact assembly 20. This embodiment of the invention significantly improves the breaking capacity and operational stability of the frame low-voltage switch 1 through a simplified structure, high transmission efficiency, and fast response speed operating mechanism 10, meeting the ever-evolving demands of power applications.
[0040] In detail, the operating mechanism 10 includes a housing 100, a transmission assembly 200, and a trip shaft 300.
[0041] The transmission component 200 is disposed in the housing 100 and is used for transmission connection with the contact component 20.
[0042] The trip shaft 300 is movably disposed in the housing 100. The trip shaft 300 includes a rotating part 310, an abutting part 320, and a tripping part 330. Both the abutting part 320 and the tripping part 330 are connected to the rotating part 310. The rotating part 310 is rotatably disposed in the housing 100. The abutting part 320 is in transmission cooperation with the transmission assembly 200. The tripping part 330 is used to connect with the tripping mechanism. The axis of the abutting part 320 is not collinear with the axis of the rotating part 310.
[0043] It is understood that the contact assembly 20 includes a moving contact 21 and a stationary contact 22. The moving contact 21 and the stationary contact 22 are closed to make the circuit system conduct. In the conducting state, if a fault such as a short circuit occurs in the circuit system, a repulsive force will be generated between the moving contact 21 and the stationary contact 22. At this time, the moving contact 21 is subjected to the repulsive force and tends to separate from the stationary contact 22. As the overtravel gradually decreases, the repulsive force on the moving contact 21 acts on the bushing 270 of the transmission assembly 200 to drive the transmission assembly 200 to move synchronously. As a result, the transmission assembly 200 drives the trip shaft 300 to rotate around the axis of the rotating part 310 through the abutment part 320, thereby realizing that the trip part 330 drives the trip mechanism to trip, so as to ensure that the moving contact assembly is in the open state.
[0044] It should be noted that during the process of the moving contact 21 tripping before the overtravel gradually decreases to 0, no electric arc occurs between the moving contact 21 and the stationary contact 22 before tripping. However, during the process of the moving contact 21 repelling and the mechanism tripping, if the transmission component 200 fails to promptly drive the tripping mechanism to trip via the tripping shaft 300, or if the trip unit (such as a magnetic trip unit or an electronic trip unit) operates too slowly, causing the moving contact 21 to fall after being repelled, a strong electric arc will be generated due to the small opening distance between the moving and stationary contacts during repelling, which will lead to contact burnout. Therefore, it is preferable that the moving contact 21 trips before the overtravel gradually decreases to 0.
[0045] Furthermore, in the closed state, the distance between the moving contact 21 and the moving conductive rod (e.g.) Figure 2 As shown in a), the overtravel is less than the overtravel. Therefore, before tripping, the overtravel is always greater than 0 when the moving contact 21 is subjected to repulsive force, ensuring that no electric arc occurs between the moving contact 21 and the stationary contact 22 before tripping. Thus, the electric arc only occurs after tripping.
[0046] It should be noted that, as Figure 7 As shown, the axis of the abutment portion 320 (e.g.) Figure 7 (as shown by the dashed line C) and the axis of the rotating part 310 (as shown by...) Figure 7 (As shown by the dashed line D) are not collinear; as Figure 4 As shown, on a plane perpendicular to the axis of the contact portion 320 and the axis of the rotating portion 310, the projection center of the contact portion 320 (e.g.) Figure 4 The midpoint C) and the projection center of the rotating part 310 (as shown) Figure 4 The midpoint D is set eccentrically, which not only significantly improves the flexibility of mechanical movements and energy transfer efficiency, but also simplifies the structural design, improves the operating accuracy and response speed, and enhances the stability and reliability of the operating mechanism 10.
[0047] Specifically, both ends of the abutment portion 320 are connected to the rotating portion 310, and the rotation axis of the abutment portion 320 is parallel to and not collinear with the rotation axis of the rotating portion 310. In other words, the rotating portions 310 at both ends of the abutment portion 320 are rotatably connected to the two side walls of the housing 100, while the tripping portion 330 extends in a direction perpendicular to the axis of the rotating portion 310. The tripping portion 330 is driven by a trip unit (such as a thermomagnetic trip unit, electronic trip unit, undervoltage trip unit, or shunt trip unit), which drives the tripping shaft 300 to rotate, and the tripping shaft 300 drives the tripping mechanism to trip.
[0048] In detail, the abutment portion 320 is a columnar structure with a combination of curved and flat surfaces. In other words, the abutment portion 320 is semi-cylindrical. Therefore, when the transmission component 200 abuts against the abutment portion 320, the transmission component 200 only needs a small amplitude of movement and a small torque to drive the trip shaft 300 to rotate through the abutment portion 320. That is, through a simple structural design, the operating accuracy and response speed of the operating mechanism 10 can be guaranteed.
[0049] Furthermore, the transmission assembly 200 includes a first transmission member 210, a second transmission member 220, a rotating shaft 230, and an elastic member 240. The first transmission member 210 and the second transmission member 220 are rotatably disposed on the rotating shaft 230, which is rotatably disposed on the housing 100. The elastic member 240 is disposed between the first transmission member 210 and the second transmission member 220. The first transmission member 210 is used to abut against the abutting part 320, and the second transmission member 220 is used to compress the elastic member 240 to abut against the abutting part 320 under the drive of the contact assembly 20, so as to drive the trip shaft 300 to rotate.
[0050] In this embodiment, one end of the first transmission member 210 is rotatably disposed on the rotating shaft 230, and the top wall of the other end is used to abut against the abutment portion 320; the second transmission member 220 is rotatably disposed on the rotating shaft 230, and the bottom wall of one end of the second transmission member 220 is used to abut against the moving contact 21 of the contact assembly 20.
[0051] By placing the elastic element 240 between the first transmission element 210 and the second transmission element 220, in the closed state, the first transmission element 210 abuts against the abutment portion 320, and the bottom wall of the second transmission element 220 abuts against the moving contact 21 of the contact assembly 20 through the bushing 270. There is a gap between the protrusion 221 of the second transmission element 220 and the abutment portion 320.
[0052] When the circuit is closed and not short-circuited, the first transmission component 210 and the second transmission component 220 can be considered as a rigid body. The operating mechanism 10 includes a four-bar linkage. The middle part of the lever 280 is rotatably connected to the housing 100 through the first shaft 290, and one end is in contact with the bushing 270 to fix the lever 280. The other end of the lever 280 is connected to one end of the four-bar linkage through the second shaft 291, at which time the second shaft 291 is a fixed point.
[0053] If lever 280 is released from its fixed state while the circuit is closed, meaning lever 280 can rotate around the first axis 290, then the second axis 291 becomes the movable point, the four-bar linkage becomes a five-bar linkage, and the operating mechanism is released.
[0054] In a conventional tripping structure, the tripping part 330 is driven by a trip unit (such as a thermomagnetic trip unit, electronic trip unit, undervoltage trip unit, or shunt trip unit), which drives the tripping shaft 300 to rotate, causing the transmission assembly 200 to disengage from the abutment part 320 (for example, the first transmission member 210 disengages from the abutment part 320). One end of the lever 280 contacts the bushing 270. Since the transmission assembly 200 disengages from the abutment part 320, the lever 280 can push the transmission assembly 200 to rotate, releasing the lever 280 from its fixed state, and the operating mechanism trips.
[0055] This embodiment of the invention provides a quick-release structure when a short circuit or other fault occurs in the circuit system. One end of the lever 280 contacts the bushing 270. The repulsive force of the moving contact 21 is transmitted to the lever 280, which pushes the transmission assembly 200 to rotate the release shaft 300 (for example, by rotating the release shaft 300 through the abutment part 320). This causes the transmission assembly 200 to disengage from the abutment part 320 (for example, the first transmission member 210 disengages from the abutment part 320), the lever 280 is released from its fixed state, and the operating mechanism is released.
[0056] Therefore, when the moving contact 21 is repelled and separates from the stationary contact 22, it drives the second transmission member 220 to move synchronously. During this movement, the second transmission member 220 first moves towards the abutment portion 320 and compresses the elastic member 240. At this time, the abutment portion 320 only has a tendency to rotate under the abutment action of the first transmission member 210. As the second transmission member 220 continues to move until it abuts against the abutment portion 320, the abutment portion 320 is simultaneously subjected to the abutment forces of the first transmission member 210 and the second transmission member 220, thereby quickly and effectively driving the trip shaft 300 to rotate clockwise, causing the abutment portion 320 to disengage from the first transmission member 210 and realizing the mechanism's release. It can be seen that the entire movement process is highly efficient.
[0057] In detail, such as Figure 4 As shown, the second transmission member 220 rotates clockwise along the rotating shaft 230 under the drive of the moving contact 21. At this time, the first transmission member 210 abuts against the abutting part 320 of the tripping shaft 300 under the action of the elastic member 240. After the second transmission member 220 also abuts against the abutting part 320, the abutting part 320 drives the rotating part 310 to rotate clockwise under the combined abutting action of the first transmission member 210 and the second transmission member 220, so that the abutting part 320 releases the abutting part from the first transmission member 210, and the tripping action is completed.
[0058] Furthermore, the second transmission member 220 has a protrusion 221 on its top wall away from the elastic member 240, and the protrusion 221 is used to abut against the abutment part 320.
[0059] Therefore, by providing a protrusion 221 on the top wall of the second transmission member 220, the second transmission member 220 can abut against the abutment part 320 with only a small movement relative to the first transmission member 210.
[0060] It should be noted that the protrusion 221 is composed of two inclined surfaces. During the process of the second transmission member 220 abutting the abutment part 320 and driving it to rotate, the protrusion 221 abuts the abutment part 320, and the release shaft 300 rotates clockwise, thereby realizing the release of the abutment part 320 from the first transmission member 210 and completing the release action.
[0061] In detail, the transmission assembly 200 also includes a mounting base 250, which is disposed on the second transmission member 220. The mounting base 250 is provided with a first limiting part 251, and the bottom wall of the first transmission member 210 is provided with a second limiting part 211. One end of the elastic member 240 is sleeved on the first limiting part 251, and the other end is sleeved on the second limiting part 211.
[0062] Therefore, by fitting one end of the elastic member 240 onto the first limiting part 251 and the other end onto the second limiting part 211, it is ensured that the elastic member 240 is stably installed between the first transmission member 210 and the mounting member.
[0063] It should be noted that the number of elastic elements 240 can be set to multiple, such as... Figure 6 As shown, there are two elastic members 240, and correspondingly, there are also two first limiting parts 251 and two second limiting parts 211. The two ends of the two elastic members 240 are respectively sleeved on the two corresponding first limiting parts 251 and two second limiting parts 211.
[0064] The transmission assembly 200 also includes a limiting member 260, which is disposed on the second transmission member 220. The limiting member 260 is used to abut against the first transmission member 210 to restrict the rotation of the first transmission member 210, so that the first transmission member 210, the second transmission member 220, and the elastic member 240 become a whole.
[0065] It is also worth mentioning that there are two second transmission components 220. The two second transmission components 220 are respectively disposed on both sides of the first transmission component 210, and the two second transmission components 220 are connected by a limiting component 260, thereby making the transmission assembly 200 structurally stable.
[0066] Furthermore, the first transmission member 210 includes a first connecting part 212, a second connecting part 213, and a third connecting part 214 connected in sequence. The end of the first connecting part 212 is rotatably disposed on the rotating shaft 230. The two ends of the second connecting part 213 are respectively connected at an angle to the first connecting part 212 and the second connecting part 213. The limiting member 260 is used to abut against the first connecting part 212, and the elastic member 240 abuts against the third connecting part 214.
[0067] In this embodiment, the first connecting portion 212 and the third connecting portion 214 are parallel and perpendicular to the second connecting portion 213. The second connecting portion 213 extends in a direction away from the second transmission member 220. Therefore, by setting the limiting member 260 at the bend of the first connecting portion 212 and the second connecting portion 213, the relative movement of the first transmission member 210 and the second transmission member 220 can be effectively limited.
[0068] It is worth mentioning that the second limiting part 211 protrudes from the bottom wall of the third connecting part 214.
[0069] In summary, this utility model provides an operating mechanism 10 and a low-voltage switch 1. When a short circuit or other fault occurs in the circuit system, the moving contact 21 in the contact assembly 20 is separated from the stationary contact 22 by a repulsive force, which drives the transmission assembly 200 to move synchronously. This causes the tripping shaft 300 to rotate around the axis of the rotating part 310 via the abutment part 320, and the tripping part 330 is driven by the rotating part 310 to trip the tripping mechanism, ultimately ensuring that the moving contact assembly is in an open state. Furthermore, the axis of the abutment part 320 is not collinear with the axis of the rotating part 310. That is, on a plane perpendicular to both the axes of the abutment part 320 and the rotating part 310, the projection center of the abutment part 320 is eccentrically set with the projection center of the rotating part 310. This improves the flexibility of mechanical transmission and the efficiency of energy transfer, simplifies the structural design of the tripping shaft 300, and improves its operating accuracy and response speed, thus enhancing the stability and reliability of the operating mechanism 10.
[0070] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.
Claims
1. An operating mechanism, characterized in that, include: Casing (100); A transmission assembly (200) is disposed in the housing (100) and is used for transmission connection with the contact assembly (20); A trip shaft (300) is movably disposed in the housing (100). The trip shaft (300) includes a rotating part (310) and an abutting part (320). The abutting part (320) is connected to the rotating part (310). The rotating part (310) is rotatably disposed in the housing (100). The abutting part (320) is in transmission cooperation with the transmission assembly (200). The axis of the abutting part (320) is not collinear with the axis of the rotating part (310). The transmission assembly (200) is driven by the contact assembly (20) to move, thereby driving the trip shaft (300) to rotate around the axis of the rotating part (310), thereby driving the operating mechanism to trip.
2. The operating mechanism according to claim 1, characterized in that, The two ends of the abutting part (320) are respectively connected to the rotating part (310), and the rotation axis of the abutting part (320) is parallel to and not collinear with the rotation axis of the rotating part (310).
3. The operating mechanism according to claim 1, characterized in that, The abutting part (320) is a columnar structure that combines an arc surface and a plane.
4. The operating mechanism according to claim 1, characterized in that, The transmission assembly (200) includes a first transmission member (210), a second transmission member (220), a rotating shaft (230), and an elastic member (240). The first transmission member (210) and the second transmission member (220) are rotatably disposed on the rotating shaft (230), which is rotatably disposed on the housing (100). The elastic member (240) is disposed between the first transmission member (210) and the second transmission member (220). The first transmission member (210) is used to abut against the abutting part (320), and the second transmission member (220) is used to compress the elastic member (240) and the abutting part (320) under the drive of the contact assembly (20) to drive the tripping shaft (300) to rotate.
5. The operating mechanism according to claim 4, characterized in that, The second transmission member (220) has a protruding part (221) for abutting against the abutting part (320).
6. The operating mechanism according to claim 4, characterized in that, The transmission assembly (200) further includes a mounting base (250), which is disposed on the second transmission member (220). The mounting base (250) has a first limiting part (251) protruding from it, and the first transmission member (210) has a second limiting part (211) protruding from it. One end of the elastic member (240) is sleeved on the first limiting part (251), and the other end is sleeved on the second limiting part (211).
7. The operating mechanism according to claim 4, characterized in that, The transmission assembly (200) further includes a limiting member (260), which is disposed on the second transmission member (220) and is used to abut against the first transmission member (210). The limiting member (260) and the elastic member (240) are respectively located on both sides of the first transmission member (210).
8. The operating mechanism according to claim 7, characterized in that, There are two second transmission components (220), which are respectively disposed on both sides of the first transmission component (210) and connected by the limiting component (260).
9. The operating mechanism according to claim 7, characterized in that, The first transmission member (210) includes a first connecting part (212), a second connecting part (213), and a third connecting part (214) connected in sequence. The end of the first connecting part (212) is rotatably disposed on the rotating shaft (230). The two ends of the second connecting part (213) are connected to the first connecting part (212) and the second connecting part (213) at an angle to each other. The limiting member (260) is used to abut against the first connecting part (212), and the elastic member (240) abuts against the third connecting part (214).
10. A low-voltage switch, characterized in that, It includes a contact assembly (20) and an operating mechanism as described in any one of claims 1-9, wherein the contact assembly (20) is drive-connected to the transmission assembly (200).