Spring adjusting assembly, operating mechanism and circuit breaker

Abstract

The utility model belongs to the technical field of electrical equipment adjustment, and discloses a spring adjusting assembly, an operating mechanism and a circuit breaker. The spring adjusting assembly comprises a rack, a first adjusting mechanism and a second adjusting mechanism. Wherein the first adjusting mechanism comprises a first sensor and a fastening piece arranged on the rack, the fastening piece is used for extruding one end of the spring, and the first sensor is arranged between the fastening piece and the spring and used for detecting the pressure applied to the spring by the fastening piece; the second adjusting mechanism is detachably connected with the rack and comprises a pressing rod, a driving part and a second sensor, the pressing rod is slidably connected with the rack, the driving part is in transmission connection with one end of the pressing rod and used for driving the pressing rod to extrude one end of the spring, and the second sensor is used for monitoring the pressure applied to the spring by the pressing rod in real time. According to the utility model, automatic adjustment can be realized, the manual operation intensity is reduced, the efficiency and the adjustment precision are improved, and meanwhile, a real-time monitoring function of spring force value adjustment is realized.

Description

Technical Field

[0001] This utility model relates to the field of electrical equipment adjustment technology, and in particular to a spring adjustment assembly, an operating mechanism, and a circuit breaker. Background Technology

[0002] In circuit breaker products, the opening spring in the spring-operated mechanism needs to be adjusted. The spring-operated mechanism is a mechanical operating mechanism that uses a spring as an energy storage element. The energy storage of the spring can be achieved through electric drive and a reduction gear. A locking mechanism holds the spring in the stored energy state. When the circuit breaker trips, the locking mechanism uses magnetic force to release the stored energy, which is then transmitted through a mechanical transmission unit to actuate the moving contact. Adjusting the opening spring is a necessary process to ensure the smooth operation of the spring-operated mechanism and is crucial for the mechanical reliability and performance of the product. Spring-operated mechanisms are widely used due to their superior performance, safety, reliability, ease of maintenance, and long service life.

[0003] Currently, various spring structures produced domestically and internationally are used, making installation and debugging difficult and prone to failure. In particular, mechanical failures frequently result in insufficient spring energy storage, necessitating detailed inspection of the mechanical transmission components and energy storage spring components. Previously, installation, debugging, and inspection were all done manually. Adjusting the opening and closing springs was time-consuming and labor-intensive, leading to low spring force adjustment accuracy, inability to monitor spring force values, low equipment reliability, high labor intensity, and a high risk of mechanical injury. Currently, the adjustment fixture for spring operating mechanisms primarily uses a lead screw and adjusting bolt. A fixed bracket is installed at the spring tail or outside the spring. The lead screw and adjusting bolt are mounted on the fixed bracket, with one end pressing against a stop plate at the spring tail and the other end used for adjustment. By adjusting the relative length between the adjusting bolt and the fixed bracket, the stop plate is compressed, thus compressing the spring.

[0004] In circuit breaker products, the springs used for closing and opening are manually adjusted, which increases labor intensity, is time-consuming, has a low degree of automation, low adjustment accuracy, and lacks the function of detecting the force value of the spring. Utility Model Content

[0005] The purpose of this utility model is to provide a spring adjustment component, operating mechanism, and circuit breaker that can achieve automated adjustment, reduce manual labor intensity, improve efficiency and adjustment accuracy, and have a real-time monitoring function for spring force adjustment.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] Spring adjustment assembly, including:

[0008] The frame is located on one side of the spring;

[0009] A first adjustment mechanism includes a first sensor and a fastener disposed on the frame. The fastener is used to compress one end of the spring. The first sensor is disposed between the fastener and the spring and is used to detect the pressure applied to the spring by the fastener.

[0010] The second adjustment mechanism is detachably connected to the frame. The second adjustment mechanism includes a pressure rod, a driving component, and a second sensor. The pressure rod is slidably connected to the frame. The driving component is driven to one end of the pressure rod. The driving component is used to drive the pressure rod to squeeze one end of the spring. The second sensor is used to monitor the pressure applied to the spring by the pressure rod in real time.

[0011] As an alternative to the spring adjustment assembly, the second adjustment mechanism further includes:

[0012] The housing is detachably connected to the frame, and the drive unit is located inside the housing;

[0013] The transmission component has a smooth outer wall near a portion of the spring, and an external thread on the other portion of the outer wall of the pressure rod. The transmission component is threadedly connected to the pressure rod, and the driving component is driven to rotate the transmission component to move the pressure rod along the axial direction of the spring.

[0014] As an alternative to the spring adjustment assembly, the transmission component is a gear, the second adjustment mechanism includes a drive wheel, the drive wheel meshes with the transmission component, the drive component is connected to the drive wheel, and the drive component is used to drive the drive wheel to rotate.

[0015] As an alternative to the spring adjustment assembly, the transmission component has positioning bearings at both ends, and the second sensor is sandwiched between the positioning part inside the housing and the positioning bearing on the side away from the spring.

[0016] As an alternative to the spring adjustment assembly, the frame is provided with screw holes, the fastening element is a bolt, and the fastening element is threadedly engaged with the frame.

[0017] As an alternative to the spring adjustment assembly, the spring adjustment assembly further includes a control component, which is signal-connected to the first sensor, the second sensor, and the drive component.

[0018] As an alternative to the spring adjustment assembly, the locking members are provided in multiple spaced rings along the axis of the spring.

[0019] As an alternative to the spring adjustment assembly, the pressure rod is provided in multiple spaced loops along the axis of the spring.

[0020] The operating mechanism includes a spring, a linkage assembly, and a spring adjustment assembly as described in any of the above embodiments, wherein the other side of the spring is connected to the linkage assembly.

[0021] The circuit breaker includes a closing and opening mechanism and an operating mechanism as described in the above scheme, wherein the linkage component is drivenly connected to the closing and opening mechanism.

[0022] Beneficial effects:

[0023] In the first aspect of this invention, the second adjustment mechanism enables continuous adjustment of the spring under monitoring conditions. This spring adjustment assembly visualizes the spring's energy storage capacity, improving adjustment accuracy and allowing monitoring of the energy storage status during long-term operation of the circuit breaker. Furthermore, the use of a drive component enables automated adjustment, reducing manual operation intensity and improving adjustment efficiency.

[0024] In the second aspect of this utility model, an operating mechanism equipped with this spring adjustment assembly is provided, which enables real-time monitoring of the storage capacity value during the spring adjustment process, while improving the level of automation, reducing manual intervention, and ensuring adjustment accuracy and efficiency.

[0025] In a third aspect of this utility model, a circuit breaker equipped with this spring adjustment assembly can improve the level of automation and achieve stable opening and closing operations of the circuit breaker. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the structure of the spring adjusting assembly provided in this embodiment of the utility model;

[0027] Figure 2 This is a schematic diagram of the operating mechanism and the closing / opening mechanism provided in this embodiment of the utility model.

[0028] In the picture:

[0029] 100. Spring; 110. Spring shaft; 120. Upper stop plate; 130. Lower stop plate; 140. Opening spring; 150. Closing spring;

[0030] 1. Frame; 11. Nuts;

[0031] 2. First adjusting mechanism; 21. Fastening component; 22. First sensor;

[0032] 3. Second adjustment mechanism; 31. Pressure rod; 32. Driving component; 33. Second sensor; 34. Housing; 341. Positioning part; 36. Transmission component; 37. Drive wheel; 38. Positioning bearing; 39. Guide key;

[0033] 4. Control components;

[0034] 5. Linkage assembly; 51. Cam; 52. Buffer cylinder; 53. First crank arm; 54. Second crank arm; 55. Third crank arm; 56. Buffer component;

[0035] 6. Switch opening mechanism. Detailed Implementation

[0036] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0037] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between 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.

[0038] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0039] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, 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" and "second" are only used for distinction in description and have no special meaning.

[0040] Please see the appendix Figure 1 and attached Figure 2 The first aspect of this embodiment relates to a spring adjusting assembly, which includes a frame 1, a first adjusting mechanism 2, and a second adjusting mechanism 3. The first adjusting mechanism 2 includes a first sensor 22 and a retaining member 21 disposed on the frame 1. The retaining member 21 is used to compress one end of a spring 100. The first sensor 22 is disposed between the retaining member 21 and the spring 100 and is used to detect the pressure applied to the spring 100 by the retaining member 21. The second adjusting mechanism 3 is detachably connected to the frame 1 and includes a pressure rod 31, a driving member 32, and a second sensor 33. The pressure rod 31 is slidably connected to the frame 1, and the driving member 32 is drively connected to one end of the pressure rod 31. The driving member 32 is used to drive the pressure rod 31 to compress one end of the spring 100, and the second sensor 33 is used to monitor the pressure applied to the spring 100 by the pressure rod 31 in real time.

[0041] Specifically, frame 1 is a conventional frame structure, used for positioning and supporting the first adjusting mechanism 2 and the second adjusting mechanism 3. Spring 100 is the object to be adjusted. Spring 100 includes a opening spring 140 for opening and a closing spring 150 for closing. The specifications of spring 100 should be specifically selected according to the opening and closing forces of the circuit breaker equipment; this embodiment will not elaborate on this. This embodiment mainly focuses on the adjustment scheme of spring 100. An upper stop plate 120 is provided at the end of spring 100 away from frame 1, and a lower stop plate 130 is provided at the end closer to frame 1. The upper stop plate 120 and the lower stop plate 130 clamp spring 100 between them to ensure that spring 100 can stably deform axially during compression, avoiding skewing that could cause rapid release of the stored energy of spring 100, resulting in a flyback accident and affecting the safety of adjustment. A spring shaft 110 is also provided on the side of the upper stop plate 120 away from spring 100 for connection with other mechanisms.

[0042] Furthermore, the first adjustment mechanism 2 compresses the lower stop plate 130 by pressing the retaining member 21, thereby compressing and adjusting the spring 100. The retaining member 21 is arranged along the axial direction of the spring 100 and can apply pressure to the spring 100 along the axial direction. At the same time, a first sensor 22 is provided between the end of the retaining member 21 and the lower stop plate 130. The first sensor 22 is a strain gauge pressure sensor, which can detect the pressure exerted on the spring 100 by the retaining member 21. This pressure is equal to the storage capacity of the spring 100. In addition, the second adjustment mechanism 3 drives the pressure rod 31 to move along the axial direction of the spring 100 by the driving member 32, thereby pressing the lower stop plate 130 at one end of the spring 100 by the pressure rod 31. The driving member 32 can be electrically driven, and the second sensor 33 can also be a strain gauge pressure sensor to monitor the pressure applied to the spring 100 by the pressure rod 31 in real time. The second adjustment mechanism 3 is detachably connected to the frame 1, specifically by snap-fit ​​or screw connection.

[0043] In this embodiment, the second adjustment mechanism 3 enables continuous adjustment of the spring 100 under monitoring conditions. Once adjustment is complete, the first adjustment mechanism 2 locks the adjusted state of the spring 100, and then the second adjustment mechanism 3 is disassembled, thus not affecting the normal operation of the overall operating mechanism. This spring adjustment assembly visualizes the energy storage capacity of the spring 100, improving adjustment accuracy, and also enables monitoring of the energy storage status during long-term operation of the circuit breaker. Furthermore, the use of the drive component 32 enables automated adjustment, reducing manual operation intensity and improving adjustment efficiency.

[0044] Optionally, the second adjustment mechanism 3 further includes a housing 34 and a transmission component 36. The housing 34 is detachably connected to the frame 1; the drive component 32 is located inside the housing 34; a portion of the outer wall of the pressure rod 31 near the spring 100 is smooth, while another portion of the outer wall of the pressure rod 31 has external threads; the transmission component 36 is threadedly connected to the pressure rod 31; and the drive component 32 is drively connected to the transmission component 36. The drive component 32 drives the transmission component 36 to rotate, causing the pressure rod 31 to move axially along the spring 100.

[0045] Specifically, the housing 34 is rectangular. The housing 34 and the frame 1 can be connected by threaded connection, snap-fit, or flange and other connecting parts. The drive component 32 is built into the housing 34, and the transmission component 36 is sleeved on the threaded part of the pressure rod 31. The drive component 32 can drive the transmission component 36 to rotate through rotation. Furthermore, the transmission component 36 rotates and engages with the threaded part of the pressure rod 31. When the axial movement of the transmission component 36 in the spring 100 is restricted, the pressure rod 31 will move along the axial direction of the spring 100, thereby pressing the lower baffle 130 on one side of the spring 100 along the axial direction, thus adjusting the storage capacity of the spring 100.

[0046] In this embodiment, on the one hand, by enclosing the drive component 32 and the transmission component 36 inside the housing 34, a modular structure can be achieved. That is, when the second adjustment mechanism 3 needs to work, the housing 34 can be directly assembled and connected to the frame 1; when the second adjustment mechanism 3 does not need to work, the housing 34 can be directly disassembled from the frame 1, thereby improving operability, simplifying the intermediate assembly process, and reducing the difficulty of repetitive positioning of multiple parts. On the other hand, by enclosing the drive component 32 and the transmission component 36 inside the housing 34, the internal transmission mechanism is protected, thereby improving the overall service life.

[0047] Furthermore, the transmission component 36 is a gear, and the second adjustment mechanism 3 includes a drive wheel 37, which meshes with the transmission component 36 for transmission. The drive component 32 is connected to the drive wheel 37 for transmission, and the drive component 32 is used to drive the drive wheel 37 to rotate.

[0048] Specifically, the driving component 32 can be a motor worm gear assembly, and the driving wheel 37 can be a compound gear. A large-diameter single-sided gear is formed on one side of the driving wheel 37, and a small-diameter single-sided gear is coaxially connected to it. The transmission component 36 is a gear with a threaded inner ring and teeth formed on the outer ring. The worm gear of the driving component 32 meshes with the large-diameter single-sided gear for transmission, and the small-diameter single-sided gear meshes with the transmission component 36 for transmission. The addition of the intermediate component, the driving wheel 37, enables speed adjustment and further optimizes the layout, rationally allocating the motion space between the driving component 32 and the transmission component 36.

[0049] In this embodiment, the meshing transmission between the motor worm gear assembly and the drive wheel 37 enables reverse self-locking and static self-locking during movement, avoiding the risk of mechanical damage to the spring 100 during compression and improving reliability.

[0050] Optionally, the pressure bar 31 and the frame 1 are slidably connected by a guide key 39.

[0051] In this embodiment, the guide key 39 is a flat key. The guide key 39 can restrict the circumferential rotation of the pressure rod 31, and at the same time provide guidance for the axial movement of the pressure rod 31 along the spring 100, ensuring the accuracy of the movement.

[0052] In other embodiments, the transmission member 36 can be fixedly connected to the pressure rod 31, and the pressure rod 31 can be threadedly connected to the frame, thereby enabling the pressure rod 31 to move axially along the spring 100.

[0053] Furthermore, various working states can be formed depending on the different extension lengths of the pressure rod 31 and the angle between it and the lower stop plate 130. For different working states, the specific meshing transmission structure between the drive wheel 37 and the transmission component 36 needs to be adjusted. For example, spur gears, helical gears, or bevel gears can be selected to create parallel, perpendicular, or other angular fits between the drive wheel 37 and the transmission component 36 corresponding to different working states. This embodiment uses the parallel fit of spur gears as an example for discussion.

[0054] Optionally, the transmission component 36 is provided with positioning bearings 38 at both ends, and the second sensor 33 is sandwiched between the positioning part 341 inside the housing 34 and the positioning bearing 38 on the side away from the spring 100.

[0055] Specifically, the transmission component 36 is mounted inside the housing 34 by two opposing positioning bearings 38. These bearings restrict the movement of the transmission component 36 along the axial direction of the spring 100, allowing it to rotate only. Simultaneously, the positioning part 341 is a fixed structure on the housing 34. The two ends of the second sensor 33 are respectively clamped between the positioning bearings 38 and the positioning part 341 on the side furthest from the spring 100. The force F1 between the positioning bearings 38 and the positioning part 341 is equal to the force F2 between the transmission component 36 and the pressure rod 31, and equal to the force F3 between the pressure rod 31 and the lower baffle 130. Therefore, the storage capacity of the spring 100 can be indirectly monitored in real time through the second sensor 33.

[0056] Optionally, the frame 1 is provided with screw holes, and the fastener 21 is a bolt, which is threadedly engaged with the frame 1.

[0057] In this embodiment, the fastener 21 can be a bolt, and a screw hole can be directly made on the frame 1 to screw into the fastener 21. Alternatively, a smooth hole can be made on the frame 1, and a nut 11 can be fixedly connected to one end of the smooth hole, so that the fastener 21 and the nut 11 are screwed into each other.

[0058] The storage capacity of spring 100 can be easily and precisely adjusted through the threaded connection, ensuring the stability of the adjustment.

[0059] Optionally, the locking members 21 are provided in multiple spaced rings along the axis of the spring 100.

[0060] In this embodiment, multiple locking members 21 are spaced apart and evenly arranged around the axis of the spring 100. The multiple locking members 21 are arranged in parallel. By adjusting the storage capacity value of the spring 100 through the multiple locking members 21, the uniformity of the compressive force can be ensured, and the spring 100 can be reliably compressed.

[0061] Optionally, multiple pressure bars 31 are provided along the axis of spring 100 in a spaced-apart ring configuration.

[0062] In this embodiment, multiple pressure rods 31 are spaced around the axis of the spring 100. At the same time, multiple transmission components 36 mesh sequentially with the circumferential teeth of the small-diameter single-sided gear of the drive wheel 37. The rotation of the small-diameter single-sided gear causes multiple transmission components 36 to rotate synchronously, which can ensure that multiple pressure rods 31 move synchronously and compress the spring 100.

[0063] Furthermore, the spring adjustment assembly also includes a control element 4, which is signal-connected to the first sensor 22, the second sensor 33, and the drive element 32.

[0064] In this embodiment, the control unit 4 is signal connected to the first sensor 22, the second sensor 33 and the drive unit 32 to realize the interaction of information flow and information processing. The control unit 4 can adopt a conventional monitoring system. The specific structure and principle of the control unit 4 will not be elaborated in this embodiment.

[0065] In this embodiment, the control unit 4 determines the compression length of the spring 100 by acquiring the number of rotations of the drive unit 32, and further calculates the compression work of the spring 100 indirectly by combining the storage capacity value of the second sensor 33.

[0066] The second aspect of this embodiment also relates to an operating mechanism, which includes a spring 100, a linkage component 5, and a spring adjustment component, wherein the other side of the spring 100 is connected to the linkage component 5.

[0067] The operating mechanism equipped with this spring adjustment component can realize real-time monitoring of the storage capacity value during the adjustment of the spring 100, while improving the level of automation, reducing manual intervention, and ensuring adjustment accuracy and efficiency.

[0068] The third aspect of this embodiment also relates to a circuit breaker, which includes the above-mentioned operating mechanism and closing / opening mechanism 6, wherein the linkage component 5 is drivenly connected to the closing / opening mechanism 6.

[0069] Specifically, the linkage assembly 5 includes a cam 51, a buffer cylinder 52, a first crank arm 53, a second crank arm 54, a third crank arm 55, and a buffer member 56. The spring 100 includes two types: the aforementioned opening spring 140 for opening and the closing spring 150 for closing. This spring adjustment assembly can be selectively linked and adjusted with either the opening spring 140 or the closing spring 150.

[0070] The working process of this circuit breaker is as follows:

[0071] The combined action of the opening spring 140 and the spring adjusting assembly drives the crank arm system composed of the first crank arm 53, the second crank arm 54, and the third crank arm 55, thereby keeping the opening / closing mechanism 6 in the open state and the circuit breaker as a whole open. The combined action of the closing spring 150 and the spring adjusting assembly keeps the closing / closing mechanism 6 in the closed state and the circuit breaker as a whole closes. The alternating operation of the opening spring 140 and the closing spring 150 drives the crank arm system to achieve the opening and closing operations of the circuit breaker. The buffer cylinder 52 and the buffer element 56 respectively buffer the moving parts inside the entire linkage assembly 5. In reality, the linkage assembly 5 has various forms; this embodiment only illustrates a conventional form.

[0072] Circuit breaker equipment equipped with this spring adjustment assembly can improve the level of automation and achieve stable opening and closing operations of the circuit breaker equipment.

[0073] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A spring adjusting assembly, characterized in that, include: The frame (1) is located on one side of the spring (100); The first adjustment mechanism (2) includes a first sensor (22) and a fastener (21) disposed on the frame (1). The fastener (21) is used to compress one end of the spring (100). The first sensor (22) is disposed between the fastener (21) and the spring (100) and is used to detect the pressure applied to the spring (100) by the fastener (21). The second adjustment mechanism (3) is detachably connected to the frame (1). The second adjustment mechanism (3) includes a pressure rod (31), a driving member (32), and a second sensor (33). The pressure rod (31) is slidably connected to the frame (1). The driving member (32) is driven to one end of the pressure rod (31). The driving member (32) is used to drive the pressure rod (31) to squeeze one end of the spring (100). The second sensor (33) is used to monitor the pressure applied to the spring (100) by the pressure rod (31) in real time.

2. The spring adjusting assembly according to claim 1, characterized in that, The second adjustment mechanism (3) also includes: The housing (34) is detachably connected to the frame (1), and the drive unit (32) is located inside the housing (34); The transmission component (36) has a smooth outer wall near a portion of the spring (100), and the outer wall of the other portion of the pressure rod (31) is provided with external threads. The transmission component (36) is threadedly connected to the pressure rod (31), and the driving component (32) is drivenly connected to the transmission component (36). The driving component (32) drives the transmission component (36) to rotate, thereby causing the pressure rod (31) to move along the axial direction of the spring (100).

3. The spring adjusting assembly according to claim 2, characterized in that, The transmission component (36) is a gear, and the second adjustment mechanism (3) includes a drive wheel (37). The drive wheel (37) meshes with the transmission component (36) for transmission, and the drive component (32) is connected to the drive wheel (37) for transmission. The drive component (32) is used to drive the drive wheel (37) to rotate.

4. The spring adjusting assembly according to claim 2, characterized in that, The transmission component (36) is provided with positioning bearings (38) at both ends. The second sensor (33) is sandwiched between the positioning part (341) inside the housing (34) and the positioning bearing (38) on the side away from the spring (100).

5. The spring adjusting assembly according to claim 1, characterized in that, The frame (1) is provided with screw holes, and the fastener (21) is a bolt, which is threadedly engaged with the frame (1).

6. The spring adjusting assembly according to any one of claims 1-5, characterized in that, The spring adjustment assembly also includes a control component (4), which is signal connected to the first sensor (22), the second sensor (33) and the drive component (32).

7. The spring adjusting assembly according to any one of claims 1-5, characterized in that, The fasteners (21) are provided in multiple spaced rings along the axis of the spring (100).

8. The spring adjusting assembly according to any one of claims 1-5, characterized in that, The pressure rod (31) is provided in multiple spaced rings along the axis of the spring (100).

9. An operating mechanism, characterized in that, It includes a spring (100), a linkage assembly (5), and a spring adjustment assembly as described in any one of claims 1-8, wherein the other side of the spring (100) is connected to the linkage assembly (5).

10. A circuit breaker, characterized in that, It includes a closing and opening mechanism (6) and an operating mechanism as described in claim 9, wherein the linkage component (5) is drive-connected to the closing and opening mechanism (6).

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