Operating mechanism and circuit breaker
By setting protrusions and guide surfaces on the linkage cover of the reclosing circuit breaker, combined with a telescopic linkage rod and a compression spring, the problem of incorrect operation sequence caused by motor reversal is solved, realizing accurate and reliable opening and closing operation of the circuit breaker, and improving safety and stability.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- DELIXI ELECTRIC
- Filing Date
- 2025-04-25
- Publication Date
- 2026-05-19
AI Technical Summary
Existing reclosing circuit breakers lack effective reverse protection when the motor reverses, leading to incorrect operating sequence, affecting closing and opening functions, and increasing safety risks.
An operating mechanism was designed. By setting a boss and a guide surface on the linkage cover, the linkage rod slides with the boss when the motor reverses, thus preventing the drive gear from reversing. An automatic reset is achieved by using a telescopic linkage rod and a compression spring. Combined with four-point synchronous drive and radial limit, the transmission reliability is improved.
It effectively prevents circuit breaker malfunctions, improves the accuracy and reliability of the operating mechanism and circuit breaker, and ensures the accuracy and stability of the opening and closing process.
Smart Images
Figure CN224264042U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of electrical switch technology, specifically to an operating mechanism and a circuit breaker. Background Technology
[0002] Reclosing circuit breakers are important protective electrical devices in low-voltage power distribution systems, used for circuit connection and fault protection. Existing products typically support both manual and electric operation modes. In electric mode, a motor drives a gear mechanism to achieve remote opening and closing control.
[0003] In traditional designs, reclosing circuit breakers operate in a fixed unidirectional sequence (e.g., opening first and then closing). If the motor unexpectedly reverses, and the gear mechanism lacks effective reverse protection, the reclosing circuit breaker may operate in the wrong sequence, affecting the closing and opening functions, and even delaying fault protection, thus increasing safety risks.
[0004] Therefore, there is an urgent need to propose an operating mechanism to improve its reliability and ensure that the reclosing circuit breaker can work normally. Utility Model Content
[0005] The purpose of this application is to provide an operating mechanism and a circuit breaker that can improve the reliability of the operating mechanism, thereby enhancing the operational stability of the reclosing circuit breaker.
[0006] In a first aspect, embodiments of this application provide an operating mechanism, including a motor, a gear, and a linkage cover. The motor includes an output shaft. The gear is sleeved on the output shaft and has at least one axially extending linkage rod. The linkage cover is fixedly sleeved on the output shaft and has at least one boss, with the at least one boss corresponding to the at least one linkage rod. The boss includes an abutment surface and a guide surface. The abutment surface is used to push the linkage rod to drive the gear to rotate when the output shaft rotates in the forward direction. The guide surface is used to guide the linkage rod to slide past the boss when the output shaft rotates in the reverse direction. The rotation path of the boss coincides with the rotation path of the linkage rod, and the guiding direction of the guide surface is adapted to the reverse rotation direction of the output shaft.
[0007] By fixing the linkage cover to the output shaft and setting a boss on the linkage cover, the transmission between the linkage cover and the gear can be achieved through the cooperation between the boss and the linkage rod on the gear. The guide surface design on the boss ensures that the linkage rod can slide relative to the boss when the motor reverses, preventing the boss from pushing against the linkage rod. This prevents the linkage cover from driving the gear to reverse when it reverses, thus effectively preventing malfunctions of the operating mechanism and the circuit breaker connected to the operating mechanism, and improving the overall operating accuracy and functional reliability.
[0008] In some examples, the linkage is telescopically mounted on the gear, extending and contacting the abutment surface when the output shaft rotates in the forward direction, and sliding along the guide surface and gradually retracting when the output shaft rotates in the reverse direction.
[0009] The linkage rod adopts a telescopic design, which ensures accurate contact and transmission between the linkage rod and the contact surface, while preventing the linkage rod from getting stuck with the boss or breaking during the sliding process along the guide surface to the top of the boss. This ensures that the linkage cover will not affect the gear or drive the gear to reverse when it rotates with the motor, thus improving the reliability of the drive mechanism.
[0010] In some examples, the gear has a mounting hole, a limiting step and a compression spring are provided in the mounting hole, the linkage rod is inserted into the mounting hole, the first end of the compression spring is fixedly connected to the limiting step, and the second end of the compression spring is fixedly connected to the linkage rod.
[0011] The automatic reset function of the linkage rod is achieved by using a compression spring. It has the advantages of simple structure, easy assembly and low production cost. At the same time, the compression spring and the linkage rod are in direct contact and interact with each other. The cooperation method is simple and efficient, not prone to failure and easy to replace in time after failure, making it highly practical.
[0012] In some examples, the end of the linkage is provided with a flange, the second end of the compression spring abuts against the flange, and the abutting surface can abut against the circumferential sidewall of the flange.
[0013] The flange can be used to install compression springs in conjunction with the limiting step, and it can also be used to enhance the structural strength of the mating part between the linkage rod and the boss, so as to avoid the linkage rod breaking due to excessive torque and improve the reliability of the mating between the linkage rod and the boss.
[0014] In some examples, the mounting hole wall has a first extension and a second extension extending in opposite directions.
[0015] The first and second extension sections increase the mating area between the linkage rod and the mounting hole, ensuring that the linkage rod remains stable whether it extends or retracts in the mounting hole, which helps improve the transmission stability of the operating mechanism.
[0016] In some examples, there are four linkage rods, which are evenly spaced along the circumference, and four bosses, which correspond one-to-one with the four linkage rods.
[0017] This configuration allows for four-point synchronous drive between the linkage cover and the gear during forward rotation of the output shaft. This effectively improves the transmission reliability between the linkage cover and the gear, ensuring that the operating mechanism can accurately control the circuit breaker's opening and closing. Simultaneously, during reverse rotation, the four linkage rods slide along their respective guide surfaces, generating evenly distributed centrifugal forces that cancel each other out. This effectively prevents vibration of the operating mechanism and promotes its stable and reliable operation.
[0018] In some examples, the spokes of the gear have circular mounting slots, and the linkage cover has an annular extension wall that mates with the circular mounting slot, the annular extension wall being rotatably inserted into the circular mounting slot.
[0019] The linkage cover uses an annular extended wall inserted into the circular assembly groove on the gear to achieve radial limiting between the linkage cover and the gear, avoiding the situation where the boss and the linkage rod cannot contact due to radial offset, thus improving the fit stability of the boss and the linkage rod and the transmission reliability.
[0020] In some examples, the output shaft includes a first plane and a second plane, and the linkage cover has a linkage hole, which includes a third plane and a fourth plane. The first plane abuts against the third plane, and the second plane abuts against the fourth plane to circumferentially fix the linkage cover.
[0021] The torque transmission from the output shaft to the linkage cover is achieved by using a mating arrangement of two sets of contacting planes. This avoids the use of complex structures such as keyways or splines, reducing manufacturing costs. Furthermore, the large contact area allows it to withstand higher torques, thus improving transmission reliability. In addition, the planar fit has self-guiding properties, which simplifies assembly operations, reduces assembly errors, and ensures transmission accuracy.
[0022] In some examples, the end face of the output shaft is provided with a fastening hole, and a fastener is inserted through the linkage hole. The fastener is fixedly connected to the fastening hole to fix the linkage cover axially.
[0023] The linkage cover and gear are axially fixed on the output shaft using a fastener and fastening hole connection, which features a simple structure and a stable connection. This prevents the linkage cover and gear from moving away from each other axially, thus avoiding situations where the boss and linkage rod cannot fit together. This improves the stability of the fit between the linkage cover and gear, thereby enhancing the reliability of the operating mechanism.
[0024] Secondly, this application also provides a circuit breaker, including a closing mechanism and the aforementioned operating mechanism, wherein the gear in the operating mechanism is connected to the closing mechanism via a transmission.
[0025] By using the operating mechanism provided in this application, the circuit breaker can achieve electric operation of opening and closing, effectively preventing the circuit breaker from making incorrect opening and closing sequence due to motor reversal, ensuring the accuracy and reliability of the circuit breaker opening and closing process, thereby improving the stability of the circuit breaker in use. Attached Figure Description
[0026] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.
[0027] Figure 1 This is a schematic diagram of the overall structure of the operating mechanism provided in the embodiments of this application.
[0028] Figure 2 An exploded view of the operating mechanism provided in the embodiments of this application.
[0029] Figure 3 This is a schematic diagram of the gear structure provided in an embodiment of this application.
[0030] Figure 4 This is a schematic diagram of the structure of the linkage cover provided in an embodiment of this application.
[0031] Figure 5 This is a schematic diagram of the assembly of the linkage cover and gear provided in an embodiment of this application.
[0032] Figure 6 Provided for the embodiments of this application Figure 5 Cross-sectional view at point AA.
[0033] Figure 7 This is a schematic diagram of the structure of the linkage cover and the linkage rod in an embodiment of this application.
[0034] Figure 8 This is a schematic diagram of the structure of the guide surface and the linkage rod in the linkage cover provided in an embodiment of this application.
[0035] Figure 9 This is a schematic diagram of the transmission structure of the linkage cover and output shaft provided in an embodiment of this application.
[0036] Figure 10 This is a schematic diagram of the fixing structure of the linkage cover and the output shaft provided in an embodiment of this application.
[0037] Explanation of reference numerals in the attached drawings: 100, operating mechanism; 1, motor; 11, output shaft; 111, first plane; 112, second plane; 113, fastening hole; 2, gear; 21, linkage rod; 211, flange; 22, mounting hole; 221, limiting step; 222, first extension section; 223, second extension section; 23, compression spring; 24, circular assembly groove; 3, linkage cover; 31, boss; 311, abutment surface; 312, guide surface; 32, annular extension wall; 33, linkage hole; 331, third plane; 332, fourth plane; 333, fastener; 334, gasket; 34, groove. Detailed Implementation
[0038] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.
[0039] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.
[0040] 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.
[0041] In the description of this application, it should be noted that the terms "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 is in use. They are used only for the convenience of describing this application 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 this application. Furthermore, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.
[0042] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "setup" and "connection" 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 direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.
[0043] Reclosing circuit breakers, as key protective electrical devices in low-voltage power distribution systems, perform the dual functions of circuit connection and fault protection. Existing products typically offer both manual and electric operation modes. In the electric operating mechanism, the motor serves as the core drive component, and its output torque is transmitted to the circuit breaker's opening and closing mechanism through a transmission system, thereby completing the opening or closing operation. Currently, the mainstream design employs a unidirectional workflow, opening first and then closing, and its control logic relies on the precise coordination of the motor's forward / reverse rotation.
[0044] However, the transmission system in the existing technology lacks anti-reverse design. When the motor rotates in reverse due to abnormal control signal or power interference, it will cause the circuit breaker operation sequence to be disordered. For example, if the reverse operation from closing to opening is accidentally triggered, it will not only affect the normal function of the equipment, but may also increase the risk of accident due to the delay in action during short circuit faults.
[0045] Based on this, the present application provides an operating mechanism and a circuit breaker, which can improve the reliability of the operating mechanism and thus enhance the working stability of the reclosing circuit breaker.
[0046] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings.
[0047] Please refer to Figures 1 to 3 This embodiment provides an operating mechanism 100, including a motor 1, a gear 2, and a linkage cover 3. The motor 1 includes an output shaft 11. The gear 2 is sleeved on the output shaft 11, and the gear 2 has at least one axially extending linkage rod 21. The linkage cover 3 is fixedly sleeved on the output shaft 11, as shown in the figure. Figures 4 to 8 The linkage cover 3 is provided with at least one boss 31, and the at least one boss 31 corresponds to at least one linkage rod 21. The boss 31 includes an abutment surface 311 and a guide surface 312.
[0048] The contact surface 311 is used to push the linkage rod 21 to drive the gear 2 to rotate when the output shaft 11 rotates in the forward direction. The guide surface 312 is used to guide the linkage rod 21 to slide over the boss 31 when the output shaft 11 rotates in the reverse direction. The rotation path of the boss 31 coincides with the rotation path of the linkage rod 21, and the guiding direction of the guide surface 312 is adapted to the reverse rotation direction of the output shaft 11.
[0049] By fixing the linkage cover 3 to the output shaft 11 and providing a boss 31 on the linkage cover 3, the transmission between the linkage cover 3 and the gear 2 can be achieved through the cooperation between the boss 31 and the linkage rod 21 on the gear 2. The design of the guide surface 312 on the boss 31 ensures that the linkage rod 21 can slide relative to the boss 31 when the motor 1 reverses, preventing the boss 31 from pushing against the linkage rod 21. This prevents the linkage cover 3 from driving the gear 2 to reverse when it reverses, thus effectively preventing the operating mechanism 100 and the circuit breaker connected to the operating mechanism 100 from malfunctioning, and improving the overall operating accuracy and functional reliability.
[0050] Among them, reference Figures 1 to 3 The motor 1 is remotely controlled to output power through the output shaft 11. The gear 2 is mounted on the output shaft 11. Since the output shaft 11 is cylindrical and the shaft hole of the gear 2 is a circular hole, no transmission occurs between the two. At least one linkage rod 21 is provided on the gear 2 and extends along the axial direction of the gear 2, perpendicular to the spokes of the gear 2.
[0051] Reference Figures 4 to 6 The linkage cover 3 is fixedly sleeved on the output shaft 11, and the output shaft 11 directly drives the linkage cover 3 to rotate. The linkage cover 3 has at least one boss 31 on the side near the gear 2. At least one boss 31 corresponds to at least one linkage rod 21. In this way, the gear 2 can be driven to rotate normally by the corresponding abutment of a single boss 31 and a single linkage rod 21 during the rotation of the linkage cover 3.
[0052] Reference Figure 7 and Figure 8 The abutment surface 311 and the guide surface 312 on the boss 31 are connected at the top of the boss 31, and the abutment surface 311 and the guide surface 312 are located on opposite sides of the boss 31. When the output shaft 11 rotates in the forward direction, the linkage cover 3 rotates synchronously with the output shaft 11, the abutment surface 311 of the boss 31 contacts the linkage rod 21 and pushes the linkage rod 21, causing the gear 2 to rotate accordingly, thus completing the circuit breaker's opening or closing operation.
[0053] Reference Figure 8 If the output shaft 11 rotates in the opposite direction due to external interference, the linkage cover 3 will also rotate in the opposite direction. At this time, the guide surface 312 of the boss 31 will contact the linkage rod 21 and slide relative to it. The linkage rod 21 will not be subject to the pushing force applied by the boss 31, so the linkage cover 3 cannot drive the gear 2 to rotate. This design can effectively prevent the circuit breaker from malfunctioning and improve system safety.
[0054] The rotation path of the boss 31 coincides with the rotation path of the linkage rod 21, ensuring that the two can cooperate correctly during movement. The inclination direction of the guide surface 312 is adapted to the reverse rotation direction of the output shaft 11, so that the linkage rod 21 can smoothly slide away from the abutment surface 311 when rotating in the reverse direction, avoiding jamming.
[0055] Reference Figure 3 In some examples, the linkage 21 is telescopically mounted on the gear 2. When the output shaft 11 rotates in the forward direction, the linkage 21 extends and contacts the abutment surface 311. When the output shaft 11 rotates in the reverse direction, the linkage 21 slides along the guide surface 312 and gradually retracts.
[0056] The linkage 21 is telescopic, which ensures that the linkage 21 and the contact surface 311 can accurately contact and transmit power, while preventing the linkage 21 from getting stuck with the boss 31 or being broken during the sliding process of the linkage 21 along the guide surface 312 toward the top of the boss 31. This ensures that the linkage cover 3 will not affect the gear 2 or drive the gear 2 to reverse when it rotates with the motor 1.
[0057] The telescopic function of the linkage 21 can be achieved through external power (electric motor), energy storage (spring), or mechanical structure (thread). In actual use, the linkage 21 is in the extended state when it is not subjected to axial force. At this time, the linkage 21 can abut against the abutment surface 311 of the boss 31 to achieve transmission.
[0058] When the motor 1 reverses and drives the linkage cover 3 to reverse, the linkage rod 21 slides along the guide surface 312 of the boss 31. At this time, the linkage rod 21 gradually retracts as it approaches the top of the boss 31, which prevents the linkage rod 21 from getting stuck with the boss 31. This avoids the situation where the linkage cover 3 drives the gear 2 to reverse or the boss 31 bends the linkage rod 21, which is beneficial to improving the stability of the operating mechanism 100.
[0059] Reference Figure 3 In some examples, the gear 2 is provided with a mounting hole 22, a limiting step 221 and a compression spring 23 are provided in the mounting hole 22, the linkage rod 21 is inserted into the mounting hole 22, the first end of the compression spring 23 is fixedly connected to the limiting step 221, and the second end of the compression spring 23 is fixedly connected to the linkage rod 21.
[0060] The automatic reset function of the linkage rod 21 is achieved by using a compression spring 23. It has the advantages of simple structure, easy assembly and low production cost. At the same time, the compression spring 23 and the linkage rod 21 are in direct contact and interact with each other. The cooperation method is simple and efficient, not easy to fail and easy to replace in time after failure, which makes it highly practical.
[0061] Specifically, refer to Figure 3The limiting step 221 is provided on the wall of the mounting hole 22. The compression spring 23 is inserted into the mounting hole 22 and the first end of the compression spring 23 is limited by the limiting step 221. The limiting step 221 can restrict the compression spring 23 from moving further into the mounting hole 22.
[0062] The linkage rod 21 is also inserted into the mounting hole 22, and the linkage rod 21 can pass through the inner ring of the compression spring 23 and be fixedly connected to the second end of the compression spring 23. This satisfies the cooperation and extension of the linkage rod 21 and the compression spring 23, and also saves installation space.
[0063] The compression spring 23 and the second end of the linkage rod 21 can be fixedly connected by abutment, welding or snap-fit, so that the compression spring 23 can be restricted in the mounting hole 22 in conjunction with the limiting step 221, so as to prevent the compression spring 23 from coming off and causing the linkage rod 21 to fail to extend or retract.
[0064] In an alternative embodiment, the compression spring 23 can be replaced with a spring washer or an elastic sleeve or other elastic structural component, achieving the same technical effect.
[0065] Reference Figure 3 , Figure 7 and Figure 8 In some examples, the end of the linkage 21 is provided with a flange 211, the second end of the compression spring 23 abuts against the flange 211, and the abutting surface 311 can abut against the circumferential sidewall of the flange 211.
[0066] The flange 211 can be used to install the compression spring 23 in conjunction with the limiting step 221, and it can also be used to enhance the structural strength of the mating part between the linkage rod 21 and the boss 31, so as to avoid the linkage rod 21 from breaking due to excessive torque and improve the reliability of the mating between the linkage rod 21 and the boss 31.
[0067] The flange 211 is located at the end of the linkage rod 21 near the linkage cover 3. The protruding part of the flange 211 is opposite to the limiting step 221 in the mounting hole 22. The compression spring 23 is sleeved on the linkage rod 21 and limited between the limiting step 221 and the flange 211. This facilitates assembly and can stably apply force to the linkage rod 21, making it highly practical.
[0068] In addition, the circumferential sidewall of the flange 211 can abut against the contact surface 311 of the boss 31. When the linkage cover 3 rotates, force can be applied to the sidewall through the contact surface 311, which can achieve accurate transmission and maintain line-to-surface contact, reduce friction, and facilitate smooth transmission.
[0069] Reference Figure 3 and Figure 5In some examples, the wall of the mounting hole 22 is provided with a first extension 222 and a second extension 223 extending in opposite directions.
[0070] The first extension section 222 and the second extension section 223 can increase the mating area between the linkage rod 21 and the mounting hole 22, so that the linkage rod 21 can remain stable whether it is extended or retracted in the mounting hole 22, which is beneficial to improving the transmission stability of the operating mechanism 100.
[0071] The mounting hole 22 passes through the spoke of the gear 2. The first extension section 222 is located on the side of the spoke near the linkage cover 3. When the linkage rod 21 extends towards the linkage cover 3, the first extension section 222 can improve the stability of the extended part of the linkage rod 21 and prevent the linkage rod 21 from shaking.
[0072] The second extension section 223 is located on the side of the spoke plate away from the linkage cover 3. When the linkage rod 21 retracts to the side away from the linkage cover 3, the second extension section 223 can improve the stability of the reverse extension part of the linkage rod 21. It is also used to prevent the linkage rod 21 from shaking, so as to improve the stability of the linkage rod 21 in the mounting hole 22 and avoid the failure of the linkage rod 21 to cooperate with the boss 31 due to shaking.
[0073] Reference Figure 3 In some examples, there are four linkage rods 21, which are evenly spaced along the circumference. There are also four bosses 31, which correspond one-to-one with the four linkage rods 21.
[0074] With this configuration, when the output shaft 11 rotates in the forward direction, a four-point synchronous drive can be formed between the linkage cover 3 and the gear 2, effectively improving the transmission reliability between the linkage cover 3 and the gear 2 and ensuring that the operating mechanism 100 can accurately control the opening and closing of the circuit breaker. At the same time, when rotating in the reverse direction, the four linkage rods 21 slide simultaneously along their respective guide surfaces 312, generating uniformly distributed centrifugal forces that cancel each other out, which can effectively prevent vibration of the operating mechanism 100 and is conducive to the stable and reliable operation of the operating mechanism 100.
[0075] Specifically, four linkage rods 21 are fixed at 90° equal intervals on the same circumference of the gear 2 spokes, forming a cross-shaped symmetrical layout. The corresponding four bosses 31 are distributed at the same angle on the linkage cover 3, and the radius of curvature of the contact surface 311 of each boss 31 matches the contact surface of the corresponding linkage rod 21. This layout ensures uniform force distribution during torque transmission. Finite element analysis shows that, compared to a single linkage rod 21 structure, the four-linkage rod 21 design can reduce local stress by 65%.
[0076] Those skilled in the art should understand that the number of linkage rods 21 and bosses 31 is not limited to four. Depending on the torque requirements, they can be arranged in three groups, six groups, or other evenly distributed manner. These modified implementation methods all fall within the scope of protection of this patent.
[0077] Reference Figures 3 to 6 In some examples, the spokes of gear 2 are provided with a circular mounting groove 24, and the linkage cover 3 is provided with an annular extension wall 32 that cooperates with the circular mounting groove 24. The annular extension wall 32 is rotatably inserted into the circular mounting groove 24.
[0078] The linkage cover 3 uses an annular extension wall 32 inserted into the circular mounting groove 24 on the gear 2, which can achieve radial limiting between the linkage cover 3 and the gear 2, and avoid the situation where the boss 31 and the linkage rod 21 cannot contact due to radial offset, thereby improving the fit stability of the boss 31 and the linkage rod 21 and the transmission reliability.
[0079] Specifically, a circular mounting groove 24 is formed on the spokes of gear 2, located on the side of the spokes closest to the linkage cover 3. The mounting hole 22, compression spring 23, and linkage rod 21 on gear 2 are all located within the circular mounting groove 24. An annular extension wall 32 is provided on the outer edge of the linkage cover 3. The outer diameter of the annular extension wall 32 is slightly smaller than the inner diameter of the circular mounting groove 24. This ensures that the annular extension wall 32 can be smoothly inserted into the circular mounting groove 24 and achieve relative rotation while satisfying radial limiting. The annular extension wall 32 can achieve mutual limiting within the circular mounting groove 24 through its cooperation with the groove wall.
[0080] Furthermore, a radial gap of 0.1 to 0.3 mm is maintained between the annular extension wall 32 and the groove wall of the circular assembly groove 24. This gap design can both prevent jamming and prevent excessive radial movement that could cause misalignment between the linkage rod 21 and the limiting boss 31.
[0081] In addition, the cooperation between the annular extension wall 32 and the circular assembly groove 24 can form a protective structure between the linkage cover 3 and the gear 2, which can protect the linkage rod 21 from dust and water, and improve the working reliability of the operating mechanism 100 in harsh environments.
[0082] Reference Figure 9 In some examples, the output shaft 11 includes a first plane 111 and a second plane 112, and the linkage cover 3 is provided with a linkage hole 33, which includes a third plane 331 and a fourth plane 332. The first plane 111 abuts against the third plane 331, and the second plane 112 abuts against the fourth plane 332 to fix the linkage cover 3 circumferentially.
[0083] The torque transmission from the output shaft 11 to the linkage cover 3 is achieved by using a mating arrangement of two sets of contacting planes. This avoids the use of complex structures such as keyways or splines, reducing manufacturing costs. Furthermore, the large contact area allows it to withstand larger torques, thus improving transmission reliability. In addition, the planar fit has self-guiding properties, which simplifies assembly operations, reduces assembly errors, and ensures transmission accuracy.
[0084] Specifically, the first plane 111 and the second plane 112 are both connected to the end face of the output shaft 11, and the first plane 111 and the second plane 112 are arranged opposite to each other. The third plane 331 and the fourth plane 332 are arranged opposite to each other in the linkage hole 33. The cross-sectional shape of the output shaft 11 matches the cross-sectional shape of the linkage hole 33. When the output shaft 11 is inserted into the linkage hole 33, the first plane 111 and the third plane 331 are tightly fitted together, and the second plane 112 and the fourth plane 332 are tightly fitted together, thereby achieving circumferential fixation of the linkage cover 3 and the output shaft 11 and preventing relative rotation.
[0085] During assembly, the first plane 111 of the output shaft 11 is aligned with the third plane 331 of the linkage hole 33, and the second plane 112 is aligned with the fourth plane 332, and then pressed in axially. Due to the guiding effect of the planar fit, the linkage cover 3 can be quickly and accurately installed on the output shaft 11, resulting in high assembly efficiency.
[0086] In another embodiment, the mating surfaces of the output shaft 11 and the linkage hole 33 can include more planes. For example, the cross-section of the output shaft 11 can be polygonal, such as quadrilateral or hexagonal, and the shape of the linkage hole 33 can match it. This design can further increase the contact area and improve transmission stability. Compared with keyway or spline mating, this embodiment is simpler to assemble, more stable, and suitable for high-torque scenarios.
[0087] Reference Figure 10 In some examples, the end face of the output shaft 11 is provided with a fastening hole 113, and a fastener 333 is provided through the linkage hole 33. The fastener 333 is fixedly connected to the fastening hole 113 to fix the linkage cover 3 axially.
[0088] The axial fixation of the linkage cover 3 and gear 2 on the output shaft 11 is achieved by using fastener 333 and fastening hole 113. This method features a simple structure and a stable connection. It can prevent the linkage cover 3 and gear 2 from moving away from each other axially, thus preventing the boss 31 and linkage rod 21 from not being able to fit together. This improves the stability of the fit between the linkage cover 3 and gear 2, thereby improving the reliability of the operating mechanism 100.
[0089] In this embodiment, the fastening hole 113 is a threaded hole, and the fastener 333 is a bolt. During the assembly process, the gear 2 and the linkage cover 3 are first fitted onto the output shaft 11, and then the bolt is tightened into the threaded hole to restrict the axial displacement of the gear 2 and the linkage cover 3.
[0090] In addition, a washer 334 is provided between the bolt and the linkage cover 3. The linkage cover 3 has a groove 34, and the washer 334 is embedded in the groove 34. The head of the bolt is pressed against the washer 334, thereby achieving the fastening of the gear 2 and the linkage cover 3. The structure is simple and highly stable.
[0091] In one alternative embodiment, a fastening hole 113 is formed on the end face of the output shaft 11. The fastening hole 113 can be a threaded hole or an interference fit hole, etc. The corresponding fastener 333 can be a bolt or a pin, etc.
[0092] This application embodiment also provides a circuit breaker, including a closing and opening mechanism and the above-mentioned operating mechanism 100, wherein the gear 2 in the operating mechanism 100 is connected to the closing and opening mechanism in a transmission manner.
[0093] By using the operating mechanism 100 provided in this application, the circuit breaker can achieve electric operation of opening and closing, effectively preventing the circuit breaker from making incorrect opening and closing sequence due to reverse rotation of motor 1, ensuring the accuracy and reliability of the circuit breaker opening and closing process, thereby improving the stability of the circuit breaker in use.
[0094] The opening and closing mechanism is an important component in the circuit breaker for controlling the on and off states. The opening and closing mechanism is connected to the gear 2 in the operating mechanism 100 provided in this application so that the motor 1 can drive the opening and closing mechanism to perform the corresponding opening and closing operations when it drives the gear 2 to rotate.
[0095] The anti-reverse coupling between the linkage cover 3 and the gear 2 effectively limits the possibility of the motor 1 reversing and affecting the opening and closing mechanism, ensuring that the circuit breaker maintains a consistent operating sequence, which is beneficial to improving the safety of the circuit breaker. Furthermore, the operating mechanism 100 has a simple structure, which also helps save space and reduce the size of the circuit breaker.
[0096] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.
Claims
1. An operating mechanism, characterized in that, include: Motor, including output shaft; A gear is fitted onto the output shaft, and the gear is provided with at least one axially extending linkage rod; A linkage cover is fixedly sleeved on the output shaft. The linkage cover has at least one boss, and the at least one boss corresponds to the at least one linkage rod. The boss includes: The contact surface is used to push the linkage rod to drive the gear to rotate when the output shaft rotates in the forward direction; A guide surface is used to guide the linkage rod to slide past the boss when the output shaft rotates in the opposite direction; The rotation path of the boss coincides with the rotation path of the linkage rod, and the guiding direction of the guide surface is adapted to the opposite rotation direction of the output shaft.
2. The operating mechanism according to claim 1, characterized in that, The linkage rod is telescopically mounted on the gear. When the output shaft rotates in the forward direction, the linkage rod extends and contacts the abutment surface. When the output shaft rotates in the reverse direction, the linkage rod slides along the guide surface and gradually retracts.
3. The operating mechanism according to claim 2, characterized in that, The gear is provided with a mounting hole, and a limiting step and a compression spring are provided in the mounting hole. The linkage rod is inserted into the mounting hole, the first end of the compression spring is fixedly connected to the limiting step, and the second end of the compression spring is fixedly connected to the linkage rod.
4. The operating mechanism according to claim 3, characterized in that, The end of the linkage rod is provided with a flange, the second end of the compression spring abuts against the flange, and the abutting surface can abut against the circumferential sidewall of the flange.
5. The operating mechanism according to claim 3, characterized in that, The mounting hole has a first extension section and a second extension section extending in opposite directions on its hole wall.
6. The operating mechanism according to claim 1, characterized in that, The linkage rods are provided in four positions, which are evenly spaced along the circumference. There are also four bosses, which correspond one-to-one with the four linkage rods.
7. The operating mechanism according to claim 1, characterized in that, The gear has a circular mounting groove on its spokes, and the linkage cover has an annular extension wall that mates with the circular mounting groove. The annular extension wall is rotatably inserted into the circular mounting groove.
8. The operating mechanism according to claim 1, characterized in that, The output shaft includes a first plane and a second plane. The linkage cover is provided with a linkage hole, which includes a third plane and a fourth plane. The first plane abuts against the third plane, and the second plane abuts against the fourth plane to circumferentially fix the linkage cover.
9. The operating mechanism according to claim 8, characterized in that, The output shaft has a fastening hole on its end face, and a fastener is inserted through the linkage hole. The fastener is fixedly connected to the fastening hole to fix the linkage cover axially.
10. A circuit breaker, characterized in that, It includes a circuit breaker mechanism and an operating mechanism as described in any one of claims 1-9, wherein the gear in the operating mechanism is connected to the circuit breaker mechanism in a transmission manner.