Transmission mechanism and circuit breaker

Abstract

The application provides a transmission mechanism and a circuit breaker, and relates to the technical field of electrical equipment. The transmission mechanism comprises a driving motor, a transmission part, a driving gear and an operating assembly. The driving motor has a rotatable output shaft, the transmission part is in transmission connection with the output shaft, and a ratchet is connected to the transmission part. A plurality of matching grooves are arranged on the driving gear in a circumferential continuous distribution, the ratchet is matched with the matching grooves, and the ratchet and the driving gear are in one-way transmission. The operating assembly is matched with the driving gear, and the operating assembly is used for connecting an external handle. In the transmission mechanism, the transmission part, the ratchet and the driving gear are arranged, the on-off of the power transmission path can be controlled according to the working states of the driving motor and the external handle, and the possibility that the components in the transmission mechanism interfere with each other when different structures are used as driving parts and the transmission mechanism works abnormally is reduced.

Description

Technical Field

[0001] This application relates to the field of electrical equipment technology, and in particular to a transmission mechanism and a circuit breaker. Background Technology

[0002] A circuit breaker is a common circuit protection device. Its operating mechanism controls the contact assembly, causing the contacts to connect or disconnect, thus controlling the circuit's on / off state and protecting it. The transmission mechanism, as the core component of the circuit breaker's operating mechanism, translates control signals into contact movements, allowing the circuit breaker to close or open as needed.

[0003] To facilitate the control of the circuit breaker in closing and opening, the transmission mechanism is usually equipped with two sets of driving components, namely the drive motor and the drive handle. The two sets of driving components can provide power to the transmission mechanism and control the circuit breaker to open and close.

[0004] However, with this setup, when different drive components are working, the parts in the transmission mechanism may affect each other, which may reduce the reliability of the transmission mechanism or even damage some of the parts in the transmission mechanism. Utility Model Content

[0005] This application provides a transmission mechanism and a circuit breaker, which can reduce the mutual influence between different driving methods and improve the reliability of the transmission mechanism.

[0006] In a first aspect, this application provides a transmission mechanism, which includes a drive motor, a transmission component, a drive gear, and an operating component. The drive motor has a rotatable output shaft, and the transmission component is drively connected to the output shaft, with ratchet teeth connected to the transmission component. The drive gear has multiple continuously distributed circumferentially distributed mating grooves, and the ratchet teeth engage with the mating grooves, allowing for unidirectional transmission between the ratchet teeth and the drive gear. The operating component engages with the drive gear and is used to connect an external handle.

[0007] The drive motor and the external handle can control the operation of the operating components. When the drive motor is working, the transmission between the drive gear and the ratchet is engaged. An external handle is connected to the operating components, and when the external handle is working, the transmission between the drive gear and the ratchet is disengaged.

[0008] The transmission mechanism proposed in this application, in which the transmission component, ratchet, and drive gear are configured to control the on / off state of the power transmission path according to the working status of the drive motor and the external handle, can play a disengaging role and reduce the possibility of mutual interference between components in the transmission mechanism when different structures are used as drive components, which could lead to abnormal operation of the transmission mechanism.

[0009] Optionally, the ratchet includes opposing tooth roots and tooth tips. In the direction from tooth root to tooth tip, the mating groove has opposing first and second ends. In two adjacent mating grooves, a transition plate is formed between the first end of one mating groove and the second end of the other. When the drive motor is operating, the ratchet pushes against the transition plate through its tooth tips, thereby driving the drive gear to rotate. An external handle is connected to the operating component. When the external handle is operating, the tooth tips separate from the transition plate, and the drive gear rotates relative to the ratchet.

[0010] Thus, the engagement or disengagement of the transmission between the ratchet and the drive gear in this application can be achieved by relying on the positional relationship between the tooth tip and the transition chuck.

[0011] Optionally, the ratchet has an outer surface facing away from the output shaft, and the mating groove has a groove bottom opposite to the output shaft. When the tooth tip abuts against the transition chuck, the projection of the outer surface coincides with the projection of the groove bottom in the axial direction of the output shaft.

[0012] The above configuration allows the outer surface of the ratchet to be matched with the shape of the bottom of the mating groove. This ensures more reliable ratchet drive of the drive gear in electric mode, reducing the likelihood of increased stress at the tooth tip due to less contact between the ratchet and the mating groove, which could easily damage the ratchet.

[0013] Optionally, the ratchet can rotate relative to the transmission component, and the transmission mechanism also includes an elastic element. The transmission component is provided with a first engagement platform, and the ratchet is provided with a second engagement platform. The elastic element is disposed between the first engagement platform and the second engagement platform, and the elastic element is in a pre-compression state. The elastic element is used to drive the ratchet to contact the mating groove.

[0014] With the above configuration, the elastic element in the pre-compression state can apply a force to the second locking platform based on its stored elastic potential energy, allowing the ratchet to rotate around its connection point with the transmission component towards the bottom of the mating groove. Thus, in both electric and manual modes, the ratchet can maintain tight contact with the bottom of the mating groove.

[0015] Optionally, there may be multiple ratchet teeth, which are spaced apart along the circumferential direction of the drive gear, and can engage with different mating slots.

[0016] Thus, in electric mode, the transmission components can drive the drive gear through multiple ratchet teeth. This makes the transmission between the ratchet teeth and the drive gear more reliable and stable, thereby making the drive of the operating components more reliable in electric mode and reducing the possibility of damage to a single ratchet tooth due to excessive force.

[0017] Optionally, the ratchet is rotatable relative to the transmission component, and there are two ratchets, each with a slot. Part of the output shaft extends out of the transmission component. The transmission mechanism includes a torsion spring, which is sleeved on the output shaft. One torsion arm of the torsion spring is engaged in the slot of one ratchet, and the other torsion arm is engaged in the slot of another ratchet.

[0018] With the above configuration, a torsion spring provides resistance to both ratchet teeth. When relative movement occurs between the ratchet and the drive gear, causing a gap between the tip of the ratchet and the bottom of the mating groove, the torsion spring applies a force to each ratchet tooth, allowing the tip to rotate around its connection point with the transmission component towards the bottom of the mating groove. Thus, in both electric and manual modes, the ratchet teeth maintain tight contact with the bottom of the mating groove.

[0019] Optionally, the drive gear is further provided with a mounting hole and a mounting groove. The mounting hole is located at the bottom of the mounting groove and passes through the drive gear along the axial direction of the output shaft. The mating groove is located on the groove wall of the mounting groove. The transmission component and the portion of the ratchet near the transmission component are located in the mounting groove. The output shaft includes a first sub-shaft and a second sub-shaft connected to each other. In the axial direction of the output shaft, the projection of the first sub-shaft overlaps the projection of the second sub-shaft. The second sub-shaft passes through the mounting hole and is connected to the transmission component. The end of the first sub-shaft facing the second sub-shaft abuts against the drive gear. The mounting groove is located on the side away from the first sub-shaft.

[0020] Therefore, the driving gear provides mounting space for the transmission components and ratchet, which can be directly mounted through the driving gear. In this way, the ratchet and transmission components occupy the space of the driving gear, reducing their impact on the output shaft's axial direction and resulting in a smaller transmission mechanism.

[0021] Secondly, this application provides a circuit breaker including any of the transmission mechanisms described in the first aspect above.

[0022] Optionally, the circuit breaker includes a housing, and the drive motor is mounted on the housing. The operating components include a driven gear, a bracket, a connecting rod, a toggle element, and an actuator. The toggle element is rotatably connected to the housing and is used to connect an external handle. The driven gear meshes with the driving gear. The bracket is fixed to the driven gear. The connecting rod is located on the side of the bracket opposite to the driven gear. One end of the connecting rod is rotatably connected to the bracket and has a handle actuation shaft. The other end of the connecting rod is rotatably connected to the actuator. The end of the actuator near the connecting rod is slidable relative to the housing.

[0023] When the drive motor is working, the driving gear can drive the driven gear to rotate, so that the bracket drives the actuator to slide through the connecting rod. An external handle is connected to the operating component, and when the external handle is working, the actuating rod pushes against the handle's actuating shaft, so that the connecting rod drives the actuator to slide.

[0024] Optionally, the transmission mechanism also includes a transmission shaft sleeve, which includes a limiting part and a transmission part that are coaxially arranged and connected to each other, and the side of the limiting part facing the transmission part has an arc structure.

[0025] A drive shaft sleeve is disposed between the connecting rod and the bracket, the transmission part passes through the connecting rod and the bracket, the limiting part is located on the side of the connecting rod away from the bracket, and the handle actuating shaft is disposed on the side of the limiting part away from the transmission part. And / or, a drive shaft sleeve is disposed between the connecting rod and the actuator, the transmission part passes through the connecting rod and the actuator, and the limiting part is located on the side of the connecting rod away from the actuator.

[0026] The beneficial effects of the circuit breakers provided in the second aspect and the various possible designs of the second aspect can be found in the first aspect and the various possible implementations of the first aspect, and will not be repeated here. Attached Figure Description

[0027] Figure 1 This is an exploded view of a circuit breaker according to an embodiment of this application.

[0028] Figure 2 This is a structural diagram of a transmission mechanism according to an embodiment of this application.

[0029] Figure 3 This is a schematic diagram of a drive gear according to an embodiment of this application.

[0030] Figure 4 This is a schematic diagram of an electric motor according to an embodiment of this application.

[0031] Figure 5 This is a schematic diagram of a ratchet according to an embodiment of this application.

[0032] Figure 6 This is a schematic diagram of an embodiment of the present application in which an elastic element is connected at the ratchet.

[0033] Figure 7 This is a schematic diagram of a ratchet connected to a torsion spring according to an embodiment of this application.

[0034] Figure 8 This is an isometric view of a transmission mechanism according to an embodiment of this application.

[0035] Figure 9 This is a schematic diagram illustrating the engagement of a drive gear and a ratchet according to an embodiment of this application.

[0036] Figure 10 This is a schematic diagram of a transmission mechanism in a circuit breaker according to an embodiment of this application.

[0037] Figure 11 This is a schematic diagram of the connection between a bracket and a connecting rod according to an embodiment of this application.

[0038] Explanation of reference numerals in the attached figures:

[0039] 100: Transmission mechanism; 10: Drive motor; 11: Output shaft; 111: First sub-shaft; 112: Second sub-shaft; 20: Transmission component; 21: Racket; 211: Tooth root; 212: Tooth tip; 213: Outer surface; 201: First locking platform; 214: Second locking platform; 215: Locking slot; 30: Drive gear; 31: Mating groove; 311: Transition locking platform; 301: Mounting hole; 302: Mounting groove; 40: Operating component; 41: Driven gear; 42: Bracket; 43: Linkage rod; 431: Handle actuation shaft; 44: Actuating lever; 45: Actuator; 46: Drive shaft sleeve; 461: Limiting part; 462: Transmission part; 463: Arc structure; 50: Elastic element; 60: Torsion spring; 200: Circuit breaker; 210: Housing; 2111: Slide groove; 2101: First ratchet; 2102: Second ratchet; 3101: First groove; 3102: Second groove; 3103: Third groove; 3104: Fourth groove. Detailed Implementation

[0040] 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, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0041] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein in the specification of the application is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims and drawings of this application are intended to cover non-exclusive inclusion.

[0042] The term "embodiment" as used herein means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of the phrase "embodiment" in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0043] In this article, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can mean: A exists, A and B exist simultaneously, or B exists. Additionally, the character " / " in this article generally indicates that the preceding and following related objects have an "or" relationship.

[0044] The directional terms appearing in the following description refer to the directions shown in the figures and are not intended to limit the specific structure of this application. For example, in the description of this application, the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the figures. They are only for the convenience of describing this application 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 application.

[0045] Furthermore, the terms "first," "second," etc., in the specification and claims of this application or in the aforementioned drawings are used to distinguish different objects rather than to describe a specific order, and may explicitly or implicitly include one or more of the features.

[0046] In the description of this application, unless otherwise stated, "multiple" means two or more (including two), and similarly, "multiple groups" means two or more (including two groups).

[0047] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, "connection" or "joining" in mechanical structures can refer to a physical connection. A physical connection can be a fixed connection, such as a connection fixed by spacers, such as a connection fixed by screws, bolts, or other spacers; a physical connection can also be a detachable connection, such as a snap-fit ​​or interlocking connection; a physical connection can also be an integral connection, such as a connection formed by welding, bonding, or integral molding. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0048] The transmission mechanism 100 provided in the embodiments of this application will now be described in detail with reference to the accompanying drawings.

[0049] Reference Figure 1 As shown, this application provides a transmission mechanism 100 applied to a circuit breaker 200. (Reference) Figure 2 , Figure 3 and Figure 4 The transmission mechanism 100 includes a drive motor 10, a transmission component 20, a drive gear 30, and an operating component 40. The drive motor 10 has a rotatable output shaft 11, and the transmission component 20 is connected to the output shaft 11. A ratchet 21 is connected to the transmission component 20. The drive gear 30 has multiple continuously distributed circumferentially arranged mating grooves 31, and the ratchet 21 engages with the mating grooves 31, allowing for unidirectional transmission between the ratchet 21 and the drive gear 30. The operating component 40 engages with the drive gear 30 and is used to connect an external handle.

[0050] The drive motor 10 and the external handle can control the operation component 40. When the drive motor 10 is working, the ratchet 21 abuts against the mating groove 31, and the transmission between the drive gear 30 and the ratchet 21 is engaged. An external handle is connected to the operation component 40, and when the external handle is working, the ratchet 21 and the mating groove 31 can move relative to each other, and the transmission between the drive gear 30 and the ratchet 21 is disconnected.

[0051] In this embodiment, when the drive motor 10 is working, it can output driving force through the output shaft 11 to provide a driving method for the transmission mechanism 100. The transmission component 20 is connected to the output shaft 11, so when the drive motor 10 is working, the output shaft 11 can drive the transmission component 20 to rotate, and the transmission component 20 can also drive the ratchet 21 connected to it to rotate. At this time, the transmission between the drive gear 30 and the ratchet 21 is engaged, and the drive gear 30 can rotate based on the rotation of the ratchet 21, thus driving the operating component 40 to move.

[0052] Furthermore, the operating component 40 can also be connected to an external handle, which can provide an alternative driving method for the transmission mechanism 100, improving the redundancy of the transmission mechanism 100's drive. In this way, the external handle can serve as a backup driving method in case of drive motor 10 failure or power outage, and the external handle can drive the operating component 40 to move based on the operation of the operator or user.

[0053] In this application, the transmission between the ratchet 21 and the drive gear 30 is unidirectional. That is, when the ratchet 21 acts as the driving element, it can drive the drive gear 30 to rotate. However, when the drive gear 30 acts as the driving element, the transmission between the drive gear 30 and the ratchet 21 can be disconnected, so the rotation of the drive gear 30 will not be transmitted to the ratchet 21. In this case, there is relative motion between the drive gear 30 and the ratchet 21.

[0054] Therefore, in this application, when the drive motor 10 is working, the driving force generated by the drive motor 10 can be transmitted sequentially through the transmission component 20, the ratchet 21, the drive gear 30, and the operating component 40. An external handle is connected to the operating component 40, and when the external handle is working, the driving force generated by the external handle can directly drive the operating component 40 to move. Simultaneously, the operating component 40 can transmit power to the drive gear 30. At this time, the transmission between the drive gear 30 and the ratchet 21 is disconnected, so the operation of the external handle will not cause the ratchet 21, the transmission component 20, or the drive motor 10 to move.

[0055] In summary, the arrangement of the transmission component 20, ratchet 21, and drive gear 30 in the transmission mechanism 100 proposed in this application can control the on / off state of the power transmission path according to the working status of the drive motor 10 and the external handle, thereby acting as a clutch and reducing the possibility of mutual interference between components in the transmission mechanism 100 when different structures are used as driving components, which could lead to abnormal operation of the transmission mechanism 100. Especially in the case of operation via the external handle, it can reduce the resistance brought by the drive motor 10, and at the same time reduce the possibility of the drive gear 30 driving the drive motor 10 to rotate after power is transmitted to the drive gear 30, which could damage the drive motor 10.

[0056] Furthermore, in this application, the clutch and engagement function can be achieved through the transmission component 20, ratchet 21, and drive gear 30, requiring fewer parts and thus simplifying the structure of the transmission mechanism 100. This reduces intermediate transmission links, improving the response speed of the transmission mechanism 100. Moreover, compared to multi-stage transmissions, it significantly reduces the failure rate and enhances the reliability of the transmission mechanism 100.

[0057] In addition, since the number of components in the transmission mechanism 100 in this application is small, the cost of the transmission mechanism 100 can be reduced, and the size of the transmission mechanism 100 can be made smaller, which can facilitate the installation of the transmission mechanism 100 in the circuit breaker 200 and subsequent maintenance.

[0058] For ease of explanation, in the following description of this application, the way in which the drive motor 10 drives the transmission mechanism 100 to work is referred to as electric mode, and the way in which the external handle drives the transmission mechanism 100 to work is referred to as manual mode.

[0059] In some embodiments, such as Figure 2 and Figure 5 As shown, the ratchet 21 includes opposing tooth roots 211 and tooth tips 212, and the ratchet 21 can be connected to the transmission member 20 through the tooth roots 211. Since the size of the ratchet 21 gradually decreases in the direction from the tooth roots 211 to the tooth tips 212, the size of the side of the ratchet 21 with the tooth roots 211 is larger, and the size of the side of the ratchet 21 with the tooth tips 212 is smaller.

[0060] Combination Figure 2 , Figure 4 and Figure 5 The ratchet 21 has an outer surface 213 facing away from the output shaft 11 and an inner surface facing the output shaft 11. In this embodiment, the size of the ratchet 21 refers to the distance between the outer surface 213 and the inner surface of the ratchet 21.

[0061] like Figure 3 and Figure 5 As shown, in the direction from the tooth root 211 to the tooth tip 212, the mating groove 31 has a first end and a second end opposite to each other. In two adjacent mating grooves 31, a transition chute 311 is formed between the first end of one mating groove 31 and the second end of the other mating groove 31.

[0062] Thus, when the drive motor 10 is working, the ratchet 21 can push against the transition plate 311 through the tooth tip 212, thereby driving the drive gear 30 to rotate. An external handle is connected to the operating component 40, and when the external handle is working, the tooth tip 212 separates from the transition plate 311, and the drive gear 30 can rotate relative to the ratchet 21.

[0063] In both electric and manual modes, the rotation direction of the drive gear 30 is consistent. Here, the transmission mechanism 100 is used as an example. Figure 2 Taking the orientation shown as an example, in electric mode, the output shaft 11 can rotate counterclockwise. At this time, the ratchet 21 also rotates counterclockwise around the output shaft 11 along with the transmission component 20. The tooth tip 212 of the ratchet 21 can abut against the transition plate 311 at the second end of a mating groove 31, and through the transition plate 311, it drives the drive gear 30 to rotate counterclockwise.

[0064] In manual mode, the operating component 40 can drive the drive gear 30 to rotate counterclockwise. At this time, the rotation of the drive gear 30 causes the transition plate 311 at the second end of the mating groove 31 that engages with the ratchet 21 to also rotate counterclockwise. Under this rotation, the transition plate 311 separates from the tooth tip 212 and gradually moves away. Thus, the drive gear 30 has no pushing effect on the ratchet 21, allowing the ratchet 21 to remain stationary.

[0065] That is, in this application, the engagement or disengagement of the transmission between the ratchet 21 and the drive gear 30 is achieved by relying on the positional relationship between the tooth tip 212 and the transition plate 311.

[0066] In this application, two adjacent mating grooves 31 are connected by a transition plate 311, which makes the two adjacent mating grooves 31 continuous. Thus, in manual mode, it facilitates the relative rotation between the drive gear 30 and the ratchet 21, reducing the possibility of discontinuous dimensional changes in the drive gear 30 between two adjacent mating grooves 31, which could cause jamming in the relative rotation of the ratchet 21 and the drive gear 30, and lead to vibration of the ratchet 21 and / or the drive gear 30.

[0067] In this application, in manual mode, the drive gear 30 rotates relative to the ratchet 21. To ensure the drive gear 30 rotates normally and to prevent it from driving the ratchet 21, the surface of the ratchet 21 facing the bottom of the mating groove 31 should be smooth. For example... Figure 5 As shown, the ratchet 21 in this application can be a crescent-shaped structure. This can reduce the possibility that the ratchet 21 has a ridge structure on the side facing the bottom of the groove 31, which would cause the drive gear 30 to have an incorrect pushing action with the ridge structure during rotation, resulting in the ratchet 21 also rotating.

[0068] In this embodiment, there are multiple ratchet teeth 21, which are spaced apart along the circumferential direction of the drive gear 30. These multiple ratchet teeth 21 can engage with different mating grooves 31, such as... Figure 2 and Figure 3 As shown. Thus, in electric mode, the transmission component 20 can drive the drive gear 30 through multiple ratchet teeth 21. This makes the transmission between the ratchet teeth 21 and the drive gear 30 more reliable and stable, thereby making the drive of the operating component 40 in electric mode more reliable and reducing the possibility of damage to a single ratchet tooth 21 due to excessive force.

[0069] Furthermore, even if one ratchet 21 fails, the remaining ratchet 21s can still drive the drive gear 30. This allows maintenance of the transmission mechanism 100 to be performed after the circuit breaker 200 has finished operating, reducing the cost of emergency repairs.

[0070] It should be noted that the number of ratchet teeth 21 in this application can be 2, 3, or 4, etc. The embodiments of this application do not specifically limit the number of ratchet teeth 21. Correspondingly, in order to enable each ratchet tooth 21 to push against different transition plates 311 in electric mode, the drive gear 30 can be provided with the same number of mating grooves 31 as the number of ratchet teeth 21.

[0071] Furthermore, to reduce the mutual influence between different ratchet teeth 21 and to buffer the starting impact of the drive motor 10, thus preventing damage to the ratchet teeth 21 and / or the drive gear 30, the number of mating slots 31 can be greater than the number of ratchet teeth 21. As a preferred embodiment, the number of mating slots 31 can be twice the number of ratchet teeth 21, and the mating slots 31 corresponding to two adjacent ratchet teeth 21 are not adjacent. In this way, in electric mode, there is a certain amount of free travel between the ratchet teeth 21 and the mating slots 31, which can improve the reliability of the circuit breaker 200 operation.

[0072] Of course, the number of ratchet teeth 21 can also be 1. The specific arrangement of ratchet teeth 21 and mating groove 31 is not specifically limited in this embodiment.

[0073] In some embodiments, such as Figures 2 to 4 As shown, the mating groove 31 has a groove bottom opposite to the output shaft 11. When the tooth tip 212 abuts against the transition plate 311, the projection of the outer surface 213 of the ratchet 21 coincides with the projection of the groove bottom of the mating groove 31 in the axial direction of the output shaft 11.

[0074] With the above arrangement, the outer surface 213 of the ratchet 21 can be adapted to the shape of the bottom of the mating groove 31. That is, the bottom of the mating groove 31 is also a relatively smooth structure, and its shape is consistent with the outer surface 213 of the ratchet 21.

[0075] In this way, in electric mode, the ratchet 21 is embedded in the mating groove 31, and the contact area with the mating groove 31 is relatively large, which makes the drive of the drive gear 30 by the ratchet 21 more reliable. At the same time, it can reduce the possibility that the ratchet 21 is easily damaged due to the small contact area between the ratchet 21 and the mating groove 31, which would otherwise result in high stress at the tooth tip 212.

[0076] In manual mode, when the drive gear 30 rotates, the outer surface 213 of the ratchet 21 slides relative to the bottom of the mating groove 31. During this process, the outer surface 213 of the ratchet 21 and the bottom of the mating groove 31 guide each other, making the relative movement between the ratchet 21 and the drive gear 30 more stable and reducing the possibility of jamming or vibration of the ratchet 21 and / or the drive gear 30.

[0077] In order to ensure that the outer surface 213 of the ratchet 21 can make close contact with the bottom of the mating groove 31 when the transmission mechanism 100 is working, different improvements have been made in this application, which will be described in the following two ways.

[0078] Method 1, such as Figure 2 and Figure 6As shown, the ratchet 21 is rotatable relative to the transmission member 20. The transmission mechanism 100 also includes an elastic member 50. The transmission member 20 is provided with a first locking platform 201, and the ratchet 21 is provided with a second locking platform 214. The elastic member 50 is disposed between the first locking platform 201 and the second locking platform 214, and the elastic member 50 is in a pre-compression state. The elastic member 50 is used to drive the ratchet 21 to contact the bottom of the mating groove 31.

[0079] With the above configuration, the elastic element 50 in the pre-compression state can apply a force to the second locking platform 214 based on its stored elastic potential energy, allowing the ratchet 21 to rotate around its connection position with the transmission element 20 toward the bottom of the mating groove 31. Thus, whether in electric or manual mode, the ratchet 21 can maintain tight contact with the bottom of the mating groove 31.

[0080] In electric mode, the ratchet 21 makes close contact with the bottom of the groove 31, ensuring reliable driving of the drive gear 30 and facilitating its rotation. Furthermore, when the ratchet 21 transmits power to the drive gear 30, the power is distributed at the bottom of the groove 31 and the transition platen 311, reducing the possibility of excessive stress at the tooth tip 212 leading to severe wear or even damage.

[0081] In manual mode, the position of the mating groove 31 also shifts when the drive gear 30 rotates. At this time, a gap appears between the ratchet 21 and the bottom of the mating groove 31. The elastic element 50, being in a pre-compression state, pushes the ratchet 21 away from the first locking platform 201, causing the ratchet 21 to re-engage with the bottom of the mating groove 31. Thus, throughout the entire operation in manual mode, the ratchet 21 maintains good contact with the bottom of the mating groove 31, ensuring good mutual guidance between the outer surface 213 of the ratchet 21 and the bottom of the mating groove 31 during relative movement between the ratchet 21 and the drive gear 30, thereby improving the stability of the relative movement between the ratchet 21 and the drive gear 30.

[0082] Furthermore, the elastic element 50 facilitates switching between manual and electric modes. Specifically, in manual mode, the ratchet 21 maintains contact with the bottom of the mating groove 31. After switching to electric mode, the tip 212 of the ratchet 21 can quickly abut against the nearest transition plate 311 and apply force to it. This reduces the possibility of the ratchet 21 shifting in manual mode, or of unstable or even non-aggressive contact between the tip 212 and the transition plate 311 during rotation in electric mode due to wear of the ratchet 21.

[0083] In one preferred embodiment, the second locking platform 214 can be positioned on the ratchet 21 near the tooth tip 212. This results in a larger lever arm when the elastic element 50 pushes the ratchet 21 to rotate, facilitating the ratchet 21 to rotate until it is in close contact with the mating groove 31.

[0084] It should be noted that, in the embodiments of this application, the elastic element 50 may specifically be a compression spring, spring, sheet spring, or other structure made of elastic material, etc. The specific type of elastic element 50 is not specifically limited in the embodiments of this application.

[0085] It should also be noted that one end of the elastic member 50 can abut against the first locking platform 201, and the other end of the elastic member 50 can abut against the second locking platform 214, etc. This makes it easier to install the elastic member 50 in the transmission mechanism 100.

[0086] In the case where the elastic element 50 is a spring or other coil spiral, the end of the elastic element 50 facing the second locking platform 214 can be fitted onto the second locking platform 214, and / or, the end of the elastic element 50 facing the first locking platform 201 can be fitted onto the first locking platform 201. In this way, the second locking platform 214 and / or the first locking platform 201 also have a positioning function for the elastic element 50, which can reduce the possibility of the elastic element 50 dislodging.

[0087] Of course, the elastic element 50 can also have other connection methods. For example, one end of the elastic element 50 can be connected to the first card receiving platform 201, and the other end of the elastic element 50 can be connected to the second card receiving platform 214, etc. The specific configuration of the elastic element 50 is not specifically limited in this embodiment.

[0088] Method 2, such as Figure 2 , Figure 7 and Figure 8 As shown, the ratchet 21 is rotatable relative to the transmission member 20, and there are two ratchet 21s. The ratchet 21 is provided with a slot 215. Part of the output shaft 11 extends out of the transmission member 20. The transmission mechanism 100 includes a torsion spring 60, which is sleeved on the output shaft 11. One torsion arm of the torsion spring 60 is embedded in the slot 215 of one ratchet 21, and the other torsion arm of the torsion spring 60 is embedded in the slot 215 of the other ratchet 21.

[0089] With the above configuration, a torsion spring 60 exerts a pushing force on both ratchet teeth 21. When relative movement occurs between the ratchet teeth 21 and the drive gear 30, causing a gap between the tip 212 and the bottom of the mating groove 31, the torsion spring 60 can apply force to each ratchet tooth 21, allowing the tip 212 to rotate around its connection point with the transmission component 20 towards the bottom of the mating groove 31. Thus, in both electric and manual modes, the ratchet teeth 21 can maintain close contact with the bottom of the mating groove 31.

[0090] The specific function of the torsion spring 60 in electric mode, manual mode, and when switching between manual and electric modes can be found in the relevant description in Method 1 above. This application embodiment will not repeat the details here.

[0091] In one preferred embodiment, the slot 215 can be located on the side of the ratchet 21 near the tooth tip 212. In this way, when the torsion spring 60 pushes the ratchet 21 to rotate, the resulting lever arm is larger, which facilitates the ratchet 21 to rotate until it is in close contact with the mating slot 31.

[0092] It is understood that Method 1 and Method 2 in this application can also be used in combination. For example, the number of ratchet 21 can be 3 or 4, etc., wherein a torsion spring 60 is provided between two ratchet 21, and elastic elements 50 are provided between the remaining ratchet 21 and the transmission component 20 respectively.

[0093] Of course, when only the torsion spring 60 is set, the number of ratchet teeth 21 is not limited to 2, but can be any even number. In this case, the two ratchet teeth 21 set opposite to each other can be pushed against each other by the same torsion spring 60.

[0094] It should also be noted that, in this application, the outer surface 213 of the ratchet 21 and the bottom of the mating groove 31 can be composed of multiple arc surfaces, so that when the ratchet 21 and the driving gear 30 are relatively displaced, resulting in misalignment between the ratchet 21 and the mating groove 31, the bottom of the mating groove 31 where the tooth tip 212 is located can still be in close contact with the ratchet 21 under the action of the elastic element 50 or the torsion spring 60.

[0095] refer to Figure 9 In the diagram, there are two ratchet teeth 21 and four mating grooves 31. For ease of explanation, the ratchet teeth 21 are referred to as the first ratchet 2101 and the second ratchet 2102, and the mating grooves 31 are referred to as the first groove 3101, the second groove 3102, the third groove 3103, and the fourth groove 3104. In the illustrated state, when the drive motor 10 is working, the transmission component 20 can drive the ratchet teeth 21 to rotate counterclockwise, and drive the drive gear 30 to rotate counterclockwise through the transition plate 311. At this time, the first ratchet tooth 2101 can engage with the first groove 3101, and the second ratchet tooth 2102 can engage with the third groove 3103.

[0096] Taking the first ratchet 2101 as an example, in manual mode, the drive gear 30 rotates counterclockwise, and the first groove 3101 rotates counterclockwise along with the drive gear 30. At this time, part of the first ratchet 2101 is located in the first groove 3101, and another part of the first ratchet 2101 can be located in the fourth groove 3104. If the elastic element 50 and the torsion spring are not provided, the tooth tip 212 of the first ratchet 2101 will separate from the groove wall of the first groove 3101.

[0097] The elastic element 50 and torsion spring 60 in this application can push the first ratchet 2101, causing the tip 212 of the first ratchet 2101 to rotate towards the bottom of the first groove 3101. This ensures good contact between the tip 212 of the first ratchet 2101 and the bottom of the first groove 3101. After the first ratchet 2101 is disengaged from the first groove 3101, the elastic element 50 and torsion spring 60 can push the first ratchet 2101 into close contact with the bottom of the fourth groove 3104, causing the first ratchet 2101 to reset. At this point, the contact between the first ratchet 2101 and the fourth groove 3104 is the same as the contact between the first ratchet 2101 and the first groove 3101 before the drive gear 30 rotates. The above process is then repeated as the drive gear 30 rotates.

[0098] The multi-segment arc surface can be designed according to the size of the drive gear 30, the number of ratchet teeth 21, the matching relationship between the drive gear 30 and the operating component 40, the rotation angle of the drive motor 10 when the circuit breaker 200 performs operations such as switching between opening and closing and tripping and reclosing, so that the matching between the ratchet teeth 21 and the mating groove 31 can meet the operation in both electric and manual modes.

[0099] Of course, in this application, in addition to the settings of the first and second methods described above, the ratchet 21 can also have other settings. For example, the ratchet 21 can also be directly fixed to the transmission component 20, etc. The specific settings of the ratchet 21 are not specifically limited in the embodiments of this application.

[0100] In some embodiments, such as Figure 4 As shown, the output shaft 11 includes a first sub-shaft 111 and a second sub-shaft 112 connected to each other. In the axial direction of the output shaft 11, the projection of the first sub-shaft 111 overlaps the projection of the second sub-shaft 112. In this way, the output shaft 11 is generally stepped, and the drive gear 30 can also be installed through the output shaft 11.

[0101] Specifically, such as Figure 3 , Figure 4 and Figure 8As shown, the drive gear 30 may be provided with a mounting hole 301 extending through the drive gear 30 along the axial direction of the output shaft 11. Thus, when installing the drive gear 30, it can be fitted onto the second sub-shaft 112 through the mounting hole 301, and the drive gear 30 abuts against the end of the first sub-shaft 111 facing the second sub-shaft 112. In this way, the shoulder of the output shaft 11 can serve as a mounting and positioning point for the drive gear 30, avoiding the need for additional structures to install the drive gear 30, which would complicate the installation of the transmission mechanism 100, and also reducing the impact on the rotation of the drive gear 30.

[0102] To prevent the output shaft 11 from directly driving the drive gear 30, the size of the mounting hole 301 can be larger than the size of the second sub-shaft 112. Thus, when the output shaft 11 rotates, the second sub-shaft 112 can rotate within the mounting hole 301 without driving the drive gear 30.

[0103] In addition, such as Figure 3 , Figure 4 and Figure 8 As shown, the drive gear 30 is also provided with a mounting groove 302, a mounting hole 301 is provided at the bottom of the mounting groove 302, a mating groove 31 is provided on the groove wall of the mounting groove 302, and the transmission component 20 and a portion of the ratchet 21 near the transmission component 20 are provided in the mounting groove 302. The transmission component 20 can be connected to the second sub-shaft 112 for transmission.

[0104] Therefore, the drive gear 30 can provide installation space for the transmission component 20 and the ratchet 21, which can be directly installed through the drive gear 30. In this way, the ratchet 21 and the transmission component 20 occupy the space of the drive gear 30, which can reduce the space occupied by the ratchet 21 and the transmission component 20 in the axial direction of the output shaft 11, making the transmission mechanism 100 smaller and facilitating its installation in the circuit breaker 200.

[0105] It should be noted that the second sub-shaft 112 and the transmission component 20 can be connected in different ways. For example, the second sub-shaft 112 and the transmission component 20 can be connected by a key, so that when the second sub-shaft 112 rotates, the key can drive the transmission component 20 to rotate as well. Alternatively, the second sub-shaft 112 can also be a shaft with a waist-shaped cross-section, or a shaft with a square cross-section, etc., and the corresponding transmission component 20 can be provided with a waist-shaped hole or a square hole, so that the second sub-shaft 112 can also drive the transmission component 20 to rotate. The specific connection method between the second sub-shaft 112 and the transmission component 20 is not specifically limited in this embodiment.

[0106] The transmission mechanism 100 proposed in this application, with its transmission component 20, ratchet 21, and drive gear 30, can control the on / off state of the power transmission path according to the working status of the drive motor 10 and the external handle. This acts as a clutch, reducing the possibility of mutual interference between components in the transmission mechanism 100 when different structures are used as drive components, thus preventing abnormal operation of the transmission mechanism 100. Especially in the case of operation via the external handle, it can reduce the resistance brought by the drive motor 10 and reduce the possibility of the drive gear 30 driving the drive motor 10 to rotate after power is transmitted to the drive gear 30, thereby reducing the possibility of damage to the drive motor 10.

[0107] In addition, this application also proposes a circuit breaker 200, which includes the transmission mechanism 100 in any of the above embodiments.

[0108] Circuit breaker 200 is a protective device in a power system used to actively disconnect or connect circuits and quickly isolate risks during faults. Circuit breaker 200 mainly operates through the cooperation between moving and stationary contacts. When the moving and stationary contacts are in contact, circuit breaker 200 can connect the circuit it is in, and when the moving and stationary contacts are separated, circuit breaker 200 can disconnect the circuit it is in.

[0109] The transmission mechanism 100 is an indispensable part of the circuit breaker 200. It transmits the action of the drive structure to the moving contact based on control signals, allowing the moving contact to be structurally or physically separated from the stationary contact. In the circuit breaker 200 equipped with the transmission mechanism 100 proposed in this application, the circuit breaker 200 has different driving methods. The transmission mechanism 100 can operate reliably under different driving methods, reducing the possibility that certain components in the transmission mechanism 100 might interfere with its normal operation or even cause damage when different driving methods are used.

[0110] Furthermore, the transmission mechanism 100 proposed in this application has a simple structure, which facilitates the installation of the transmission mechanism 100 in the circuit breaker 200. It can also reduce the possibility that the driving force needs to be transmitted through multiple stages to the actuator 45 due to the complex structure of the transmission mechanism 100, thereby reducing the reliability of the transmission mechanism 100 and improving the reliability of the circuit breaker 200.

[0111] It should be noted that the circuit breaker 200 proposed in this application can be a circuit breaker 200 with different driving methods, specifically it can be a reclosing circuit breaker, a residual current reclosing circuit breaker, a power distribution circuit breaker, etc. The specific type of circuit breaker 200 is not specifically limited in the embodiments of this application.

[0112] In some embodiments, such as Figure 1 , Figure 2 , Figure 8 and Figure 10 As shown, the circuit breaker 200 includes a housing 210, a drive motor 10 mounted on the housing 210, and an operating assembly 40 including a driven gear 41, a bracket 42, a connecting rod 43, a toggle lever 44, and an actuator 45. The toggle lever 44 is rotatably connected to the housing 210 and is used to connect to an external handle. The driven gear 41 meshes with the drive gear 30, the bracket 42 is fixed to the driven gear 41, the connecting rod 43 is located on the side of the bracket 42 away from the driven gear 41, one end of the connecting rod 43 is rotatably connected to the bracket 42, and one end of the connecting rod 43 is also provided with a handle actuation shaft 431. The other end of the connecting rod 43 is rotatably connected to the actuator 45, and the end of the actuator 45 near the connecting rod 43 is slidable relative to the housing 210.

[0113] In this application, the bracket 42 is fixedly connected to the driven gear 41. Therefore, when the driven gear 41 moves, the bracket 42 will also rotate with the driven gear 41. The bracket 42, the connecting rod 43, and the actuator 45 can form a crank-slider mechanism. When the bracket 42 rotates, the connecting rod 43 can swing as a whole, allowing the actuator 45 to slide in its sliding direction.

[0114] In this embodiment, the operating component 40 can specifically cooperate with the driving gear 30 via the driven gear 41 to enable power transmission between them. In electric mode, the driving gear 30 can drive the driven gear 41 to rotate. Furthermore, the driven gear 41 can drive the actuator 45 to slide via the bracket 42 and the connecting rod 43.

[0115] In manual mode, the external handle can directly transmit power to the handle actuation shaft 431, allowing the handle actuation shaft 431 to rotate along the axis of the driven gear 41. At this time, on one hand, the bracket 42, connecting rod 43, and actuator 45 can move according to the motion law of the driving sliding mechanism, enabling the actuator 45 to slide and control the moving contact. On the other hand, the bracket 42 can also drive the driven gear 41 to rotate, and the rotation of the driven gear 41 can drive the driving gear 30 to rotate. At this time, due to the unidirectional transmission between the driving gear 30 and the ratchet 21, the ratchet 21 itself will not rotate, thus avoiding driving the output shaft 11 to rotate.

[0116] Among them, such as Figure 8 and Figure 10 As shown, the actuator 45 can specifically be a handle in the circuit breaker 200 that can drive the actuating contacts. A groove 2111 can be provided on the housing 210, and the actuator 45 can be embedded in the groove 2111. In this way, the groove 2111 can restrict the movement trajectory of the end of the actuator 45 near the connecting rod 43, so that the movement of the end of the actuator 45 near the connecting rod 43 is restricted to the extending direction of the groove.

[0117] In addition, in this application, the toggle lever 44 may be provided with an interface for inserting an external handle, and the housing 210 may be provided with a socket, through which the interface may be exposed. Thus, when it is necessary to control the circuit breaker 200 in manual mode, the external handle can be inserted into the interface through the socket. At this time, the portion of the external handle exposed in the housing 210 can receive rotational operation from the operator or user.

[0118] To ensure that when the external handle rotates, the actuating lever 44 can act on the handle actuating shaft 431, allowing one end of the connecting rod 43 to rotate around the axis of the driven gear 41, the actuating lever 44 can be configured as follows: The distance between the end of the actuating lever 44 away from the driven gear 41 and the axis of the driven gear 41 is greater than the distance between the handle actuating shaft 431 and the axis of the driven gear 41. Furthermore, in the axial direction of the driven gear 41, the handle actuating shaft 431 has opposing first and second ends, and in the radial direction of the driven gear 41, the projection of the actuating lever 44 is located between the first and second ends.

[0119] In this way, the handle action shaft 431 is located on the rotation trajectory of the lever 44, which allows the handle action shaft 431 to push against the handle action shaft 431 when the handle action shaft 431 rotates, causing the handle action shaft 431 to also rotate.

[0120] Furthermore, the aforementioned arrangement of the actuating lever 44 allows it to be misaligned with the connecting rod 43 along the axis of the driven gear 41. This reduces the possibility of mutual interference between the movements of the connecting rod 43 and the actuating lever 44.

[0121] In some embodiments, such as Figure 2 , Figure 8 and Figure 11 As shown, the transmission mechanism 100 further includes a transmission sleeve 46, which includes a limiting part 461 and a transmission part 462 coaxially arranged and interconnected. The transmission sleeve 46 is disposed between the connecting rod 43 and the bracket 42, the transmission part 462 passes through the connecting rod 43 and the bracket 42, the limiting part 461 is located on the side of the connecting rod 43 away from the bracket 42, and the handle actuation shaft 431 is disposed on the side of the limiting part 461 away from the transmission part 462. And / or, the transmission sleeve 46 is disposed between the connecting rod 43 and the actuator 45, the transmission part 462 passes through the connecting rod 43 and the actuator 45, and the limiting part 461 is located on the side of the connecting rod 43 away from the actuator 45.

[0122] That is, in this embodiment, the connecting rod 43 and the bracket 42 can be connected by a transmission shaft sleeve 46. In this case, the transmission part 462 of the transmission shaft sleeve 46 can pass through both the connecting rod 43 and the bracket 42. Thus, the transmission shaft sleeve 46 allows relative rotation between the connecting rod 43 and the bracket 42. The limiting part 461 can limit the movement of the connecting rod 43, reducing the possibility of the connecting rod 43 disengaging during movement of the connecting rod and the bracket 42.

[0123] Alternatively, the connecting rod 43 and the actuator 45 can be connected via a rotating bushing. In this case, the transmission part 462 of the transmission bushing 46 can pass through the connecting rod 43 and the actuator 45, thus allowing the connecting rod 43 and the bracket 42 to rotate relative to each other. In this case, the limiting part 461 is located on the side of the connecting rod 43 away from the actuator 45, and the limiting part 461 can also limit the connecting rod 43, reducing the possibility of the connecting rod 43 disengaging from the actuator 45.

[0124] The size of the limiting part 461 can be larger than the size of the transmission part 462. In this way, after the transmission shaft sleeve 46 is installed, the possibility that the limiting part 461 may also extend into the connecting rod 43 and lose its limiting function can be reduced.

[0125] Furthermore, in the circuit breaker 200, the actuator 45 is typically rotatably connected to the housing 210. When the actuator 45 rotates, it can drive the moving contact to rotate, causing the moving contact to move closer to or away from the stationary contact. At this time, the actuator 45 rotates as a whole, but the end of the actuator 45 near the connecting rod 43 can be restricted to slide in the slide groove 2111. In this configuration, the rotation of the actuator 45 relative to the housing 210 causes the end of the actuator 45 near the connecting rod 43 to slide not only in the slide groove but also along the axis of the driven gear 41.

[0126] In order to avoid the sliding of the actuator 45 in the axial direction of the driven gear 41 and reduce the possibility of interference between the actuator 45 and the connecting rod 43, and between the connecting rod 43 and the transmission shaft sleeve 46 when the actuator 45 slides towards the side closer to the connecting rod 43, which could lead to abnormal operation of the transmission mechanism 100, the present application has also made the following settings.

[0127] In this application, as Figure 11 As shown, the side of the limiting part 461 facing the transmission part 462 has an arc structure 463. In this way, when the actuator 45 slides along the axial direction of the driven gear 41, the limiting part 461 can avoid the actuator 45.

[0128] In specific configuration, the transmission shaft sleeve 46 can be configured based on the positional relationship between the actuator 45 and the connecting rod 43 when the actuator 45 slides to its limit position along the side facing the connecting rod 43 during rotation. At this time, the transmission shaft sleeve 46 and the connecting rod 43 can be in contact or have a clearance fit. This reduces the possibility of interference between the side of the actuator 45 near the connecting rod 43 and the connecting rod 43, and between the connecting rod 43 and the transmission shaft sleeve 46, during subsequent rotation of the actuator 45.

[0129] It is understood that the arc structure 463 can be set at the transmission shaft sleeve 46 between the connecting rod 43 and the bracket 42, and / or can be set at the transmission shaft sleeve 46 between the connecting rod 43 and the actuator 45.

[0130] Of course, in addition to the above-mentioned configuration, the actuator 45 in the circuit breaker 200 can be configured in other ways. For example, the actuator 45 can be slidably mounted in the housing 210, and the entire actuator 45 can slide to control the separation or contact of the moving contact and the stationary contact.

[0131] The specific arrangement of the actuator 45 in the housing 210 is not specifically limited in this embodiment, but can be specifically set according to the arrangement of the moving contact.

[0132] Finally, it should be noted that the above embodiments are merely specific implementations of this application, but the scope of protection of this application is not limited thereto. Any changes or substitutions within the technical scope disclosed in this application should be covered within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A transmission mechanism, characterized in that, include: The drive motor has a rotatable output shaft; A transmission component is connected to the output shaft, and the transmission component is equipped with ratchet teeth. The driving gear has multiple mating grooves continuously distributed along its circumference, and the ratchet meshes with the mating grooves, with unidirectional transmission between the ratchet and the driving gear; An operating component, which engages with the drive gear, is used to connect to an external handle; The drive motor and the external handle can control the operation of the operating component. When the drive motor is working, the transmission between the drive gear and the ratchet is engaged. The external handle is connected to the operating component, and when the external handle is working, the transmission between the drive gear and the ratchet is disengaged.

2. The transmission mechanism according to claim 1, characterized in that, The ratchet includes opposing roots and tips, the roots being connected to the transmission element, and the size of the ratchet gradually decreases in the direction from the roots to the tips. In the direction from the tooth root to the tooth tip, the mating groove has a first end and a second end opposite to each other. In two adjacent mating grooves, a transition chute is formed between the first end of one mating groove and the second end of the other mating groove. When the drive motor is working, the ratchet pushes against the transition plate through the tooth tip to drive the drive gear to rotate; the external handle is connected to the operating component, and when the external handle is working, the tooth tip separates from the transition plate, and the drive gear rotates relative to the ratchet.

3. The transmission mechanism according to claim 2, characterized in that, The ratchet has an outer surface facing away from the output shaft, and the mating groove has a groove bottom opposite to the output shaft; When the tooth tip abuts against the transition chuck, the projection of the outer surface in the axial direction of the output shaft coincides with the projection of the bottom of the mating groove.

4. The transmission mechanism according to claim 3, characterized in that, The ratchet is rotatable relative to the transmission component. The transmission mechanism also includes an elastic element. The transmission component is provided with a first engagement platform, and the ratchet is provided with a second engagement platform. The elastic element is disposed between the first engagement platform and the second engagement platform, and the elastic element is in a pre-compression state. The elastic element is used to drive the ratchet to contact the bottom of the mating groove.

5. The transmission mechanism according to claim 3, characterized in that, The number of ratchet teeth is multiple, and the multiple ratchet teeth are distributed at intervals along the circumferential direction of the drive gear. The multiple ratchet teeth can engage with different mating grooves.

6. The transmission mechanism according to claim 5, characterized in that, The ratchet is rotatable relative to the transmission component, and there are two ratchets. The ratchet is provided with a slot. A portion of the output shaft extends outward from the transmission member. The transmission mechanism includes a torsion spring, which is sleeved on the output shaft. One torsion arm of the torsion spring is embedded in the slot of one of the ratchet teeth, and the other torsion arm of the torsion spring is embedded in the slot of another ratchet tooth.

7. The transmission mechanism according to claim 1, characterized in that, The drive gear is also provided with a mounting hole and a mounting groove. The mounting hole is located at the bottom of the mounting groove and passes through the drive gear along the axial direction of the output shaft. The mating groove is located on the groove wall of the mounting groove. The transmission component and the portion of the ratchet near the transmission component are located in the mounting groove. The output shaft includes a first sub-shaft and a second sub-shaft connected to each other. In the axial direction of the output shaft, the projection of the first sub-shaft covers the projection of the second sub-shaft. The second sub-shaft passes through the mounting hole and is connected to the transmission component. The end of the first sub-shaft facing the second sub-shaft abuts against the drive gear. The mounting groove is located on the side away from the first sub-shaft.

8. A circuit breaker, characterized in that, The circuit breaker includes the transmission mechanism according to any one of claims 1-7.

9. The circuit breaker according to claim 8, characterized in that, The circuit breaker includes a housing, and the drive motor is mounted on the housing; The operating components include a driven gear, a bracket, a connecting rod, a toggle element, and an actuator. The toggle element is rotatably connected to the housing and is used to connect to the external handle. The driven gear meshes with the driving gear, the bracket is fixed to the driven gear, the connecting rod is located on the side of the bracket away from the driven gear, one end of the connecting rod is rotatably connected to the bracket and is provided with a handle actuation shaft, the other end of the connecting rod is rotatably connected to the actuator, and the end of the actuator near the connecting rod is slidable relative to the housing; When the drive motor is working, the driving gear can drive the driven gear to rotate, so that the bracket drives the actuator to slide through the connecting rod; the external handle is connected to the operating component, and when the external handle is working, the actuating rod pushes against the handle's actuating shaft, so that the connecting rod drives the actuator to slide.

10. The circuit breaker according to claim 9, characterized in that, The transmission mechanism further includes a transmission shaft sleeve, which includes a limiting part and a transmission part that are coaxially arranged and connected to each other. The side of the limiting part facing the transmission part has an arc structure. The transmission part passes through the connecting rod and the bracket, the limiting part is located on the side of the connecting rod away from the bracket, and the handle actuating shaft is located on the side of the limiting part away from the transmission part; And / or, the transmission part passes through the connecting rod and the actuator, and the limiting part is located on the side of the connecting rod away from the actuator.

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