A kind of opening and closing device and circuit breaker

Abstract

The application relates to the technical field of circuit breakers, in particular to a switching device and a circuit breaker. The switching device comprises a driving motor, an anti-reverse structure and a transmission gear. The anti-reverse structure comprises a support and a clamping shaft, the support is fixedly connected to the output shaft of the driving motor, so that the anti-reverse structure rotates together with the output shaft. The clamping shaft is elastically connected to the support. The transmission gear is rotatably connected to the output shaft, so that the transmission gear can rotate relative to the driving motor. A first notch is formed in the transmission gear, the depth of the first notch increases linearly along the clockwise direction, so that the end of the first notch forms a stepped surface with an included angle with the notch wall. The first end of the clamping shaft can abut against the stepped surface, so that the rotation of the transmission gear cannot affect the operation of the driving motor, the operator cannot simultaneously perform manual operation during the electric operation of the circuit breaker, the service life of the driving motor is guaranteed, and the safety of manual operation of the operator is improved.

Description

Technical Field

[0001] This application relates to the field of circuit breaker technology, and in particular to a switching device and a circuit breaker. Background Technology

[0002] The opening and closing of a circuit breaker can be achieved through either electric or manual operation. Therefore, the device used to achieve this operation may include a drive motor and transmission gears. The rotation of the drive motor's output shaft enables electric operation, while the rotation of the transmission gears and the connected operating handle enables manual operation.

[0003] In related technologies, when operators perform manual operations simultaneously while the circuit breaker is being electrically operated, it can damage the motor and potentially injure the operator. Utility Model Content

[0004] This application provides a switching device and a circuit breaker, in which the rotation of the transmission gear cannot affect the rotation of the output shaft of the drive motor, thereby ensuring the service life of the drive motor, reducing the maintenance cost of the circuit breaker, and improving the safety of manual operation by the operator.

[0005] In a first aspect, this application provides a circuit breaker opening and closing device, comprising: a drive motor, an anti-reverse structure, and a transmission gear. The drive motor is installed in the circuit breaker and is used to drive the circuit breaker to perform opening and closing operations. The anti-reverse structure includes a bracket and a locking shaft. The bracket is fixedly connected to the output shaft of the drive motor, so that the anti-reverse structure rotates together with the output shaft. The locking shaft is elastically connected to the bracket. The transmission gear is rotatably connected to the output shaft, so that the transmission gear can rotate relative to the drive motor. A countersunk hole is formed on the side of the transmission gear away from the drive motor, and the countersunk hole is used to accommodate the flipping structure. A first groove is formed on the wall of the countersunk hole, and the depth of the first groove increases linearly in a clockwise direction, so that the end of the first groove forms a stepped surface with an angle to the groove wall. The first end of the locking shaft points to the groove wall of the first groove, and the first end rotates within the first groove. When the first end abuts against the stepped surface, the output shaft, the bracket, and the transmission gear can rotate together in a clockwise direction.

[0006] According to the description of the first aspect of this application, an anti-reverse rotation structure is provided between the output shaft of the drive motor and the transmission gear. The stepped surface formed by the change in the depth of the first groove in the transmission gear abuts against the first end of the locking shaft in the anti-reverse rotation structure, allowing the transmission gear to rotate clockwise with the output shaft, while preventing the transmission gear from driving the output shaft to rotate counterclockwise. Furthermore, the elastic connection between the locking shaft and the bracket allows the first end to slide along the first groove, enabling the transmission gear to rotate independently relative to the bracket. When the transmission gear rotates independently clockwise, the first end of the locking shaft moves in the direction of decreasing groove depth, disengaging from the stepped surface contact. The rotational torque of the transmission gear cannot be transmitted to the output shaft of the drive motor through the locking shaft, thus preventing the motor from operating. In summary, neither clockwise nor counterclockwise rotation of the transmission gear affects the operation of the drive motor, preventing operators from performing manual operation simultaneously during the electric operation of the circuit breaker. This ensures the service life of the drive motor, reduces the maintenance cost of the circuit breaker, and improves the safety of manual operation.

[0007] In one possible design, the bracket is connected to multiple snap-fit ​​shafts. Multiple first grooves are formed in the hole wall. Each snap-fit ​​shaft corresponds to a specific first groove, causing the multiple first ends to abut against the multiple stepped surfaces.

[0008] Based on the description of the above embodiments, multiple locking shafts are designed on the bracket, and multiple first grooves corresponding to the locking shafts are designed on the transmission gear. In this case, the connection between the transmission gear and the bracket is a multi-point contact connection. The stress generated by the locking shafts and the stepped surface engaging with each other is dispersed to the aforementioned multiple contact points, thereby reducing the risk of localized stress concentration on the locking shafts and transmission gear, and improving the overall structural strength of the opening and closing device. Furthermore, the structure of each locking shaft independently embedded in its corresponding first groove ensures that even if one locking shaft cannot be locked due to wear or failure, the remaining locking shafts can still maintain their anti-reverse function, ensuring that the circuit breaker can stably achieve the anti-reverse function under both electric and manual operation.

[0009] In one possible design, the bracket includes a first connecting portion and a second connecting portion. The first connecting portion is located at the bottom of the countersunk hole. The second connecting portion is fixedly connected to the first connecting portion and is perpendicular to the first connecting portion. The first connecting portion has a first connecting hole for passing through an output shaft, and the output shaft is locked in the first connecting hole. The second connecting portion has a second connecting hole for passing through a snap-fit ​​shaft.

[0010] Based on the description of the above embodiments, the first connecting part in the bracket is used to fix the position of the bracket, and the bracket is connected to the output shaft through a first connecting hole provided on the first connecting part. The second connecting part is vertically connected to the first connecting part, and the second connecting part is provided with a second connecting hole, so that the output shaft can pass through the first connecting hole, and the snap-fit ​​shaft can also pass through the second connecting hole, so that the first end of the snap-fit ​​shaft can abut against the groove wall of the first groove, ensuring that the circuit breaker can realize the anti-reverse function.

[0011] In one possible design, the first connecting hole is a quadrilateral hole with two symmetrical arcuate sides and two straight sides. The output shaft is a quadrilateral shaft with two symmetrical arcuate sides and two straight sides. The quadrilateral shaft passes through the quadrilateral hole, preventing the quadrilateral shaft from rotating within the quadrilateral hole.

[0012] Based on the description of the above embodiments, the first connecting hole is a quadrilateral hole with two symmetrical arc sides and two straight sides, and the output shaft is a quadrilateral shaft with two symmetrical arc sides and two straight sides. The output shaft passes through the first connecting hole, and the straight side of the output shaft and the straight side of the first connecting hole form a surface contact, which avoids the output shaft from rotating relative to the first connecting hole, thereby ensuring the reliability of the linkage between the output shaft and the bracket.

[0013] In one possible design, the anti-reverse structure also includes an elastic element. The deformation direction of the elastic element is towards the groove wall from its first end. An abutment structure is provided on the first end, and one end of the elastic element abuts against the abutment structure. The other end of the elastic element abuts against one side of the second connecting portion. Alternatively, the end of the output shaft extends out of the first connecting hole and is located on the other side of the second connecting portion. The other end of the elastic element passes through the second connecting hole and abuts against the straight edge of the output shaft.

[0014] Based on the description of the above embodiments, the elastic element is used to achieve an elastic connection between the snap-fit ​​shaft and the bracket. The abutment structure is used to limit the displacement of the elastic element, preventing offsetting forces from causing offset friction between the first end of the snap-fit ​​shaft and the groove wall of the first groove, thereby improving the reliability of the anti-reverse structure.

[0015] In one possible design, a third connecting hole is provided at the bottom of the countersunk hole. The output shaft passes through the third connecting hole, allowing the transmission gear to be rotatably connected to the output shaft. The third connecting hole corresponds to the first connecting hole, so that the output shaft passes through both the first and third connecting holes simultaneously.

[0016] Based on the description of the above embodiments, the output shaft passes through the third connecting hole opened at the bottom of the countersunk hole, so that the transmission gear can be connected to the output shaft of the drive motor together with the bracket, saving the installation space of the circuit breaker and reducing the production cost of the circuit breaker.

[0017] In one possible design, the anti-reverse structure also includes a limit bolt and a washer. A fourth connecting hole is provided at the end of the output shaft. A fifth connecting hole is provided on the washer. The limit bolt passes through both the fourth and fifth connecting holes. The washer is clamped between the limit bolt and the end of the output shaft.

[0018] Based on the description of the above embodiments, the limiting bolt clamps the washer to the end of the output shaft, making the connection between the limiting bolt and the end of the output shaft more secure. Furthermore, the washer can limit the axial displacement of the transmission gear and the bracket on the output shaft, thereby enabling both the transmission gear and the anti-reverse mechanism to operate stably within the circuit breaker, thus achieving the functions of manual operation and anti-reverse operation of the circuit breaker.

[0019] In one possible design, the spacer has pins extending toward the first connecting portion. The first connecting portion has a slot. The pins have snap-fit ​​blocks that fit into the slot. The snap-fit ​​blocks snap into the slot.

[0020] Based on the description of the above embodiments, the snap-fit ​​block provided on the pin is used to snap-fit ​​the slot on the first connecting part so that the pad and the first connecting part abut against each other in the direction of the slot sidewall, thereby limiting the displacement of the bracket in the direction of the slot sidewall, further ensuring the stability of the bracket in the circuit breaker, and thus ensuring the reliable operation of the anti-reverse structure.

[0021] In one possible design, there is a gap between the bottom of the snap-fit ​​block and the bottom of the countersunk hole.

[0022] Based on the description of the above embodiments, the gap between the bottom of the locking block and the bottom of the countersunk hole can avoid friction between the transmission gear and the locking block, solve the problem of the transmission gear being obstructed due to friction during manual operation, reduce component wear, and extend the service life of the opening and closing device.

[0023] Secondly, this application provides a circuit breaker including the opening and closing device described in any of the above embodiments.

[0024] The circuit breaker provided in the second aspect above has the same beneficial effects as the first aspect and the various possible implementations of the first aspect, and will not be repeated here. Attached Figure Description

[0025] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1This is a schematic diagram of the opening and closing device in an embodiment of this application.

[0027] Figure 2 This is an exploded view of a gate opening and closing device according to an embodiment of this application.

[0028] Figure 3 This is a schematic diagram of the structure of a drive motor in an embodiment of this application.

[0029] Figure 4 This is a schematic diagram of the structure of a transmission gear in an embodiment of this application.

[0030] Figure 5 This is a schematic diagram of the assembly of the transmission gear and the snap-fit ​​shaft in an embodiment of this application.

[0031] Figure 6 This is a schematic diagram of the structure of a bracket in an embodiment of this application.

[0032] Figure 7 This is a schematic diagram of a snap-fit ​​shaft in an embodiment of this application.

[0033] Figure 8 This is a schematic diagram of the structure of a gasket in an embodiment of this application.

[0034] Explanation of reference numerals in the attached figures: 100-Closing / opening device; 1-Drive motor; 11-Output shaft; 12-Fourth connecting hole; 2-Transmission gear; 21-Counterhead; 22-Third connecting hole; 23-First groove; 24-Stepped surface; 3-Anti-reverse structure; 31-Bracket; 311-First connecting part; 312-Second connecting part; 313-First connecting hole; 314-Second connecting hole; 315-Slot; 32-Snap-fit ​​shaft; 321-First end; 322-Annular protrusion structure; 33-Elastic element; 4-Limit bolt; 5-Washer; 51-Fifth connecting hole; 52-Pin; 53-Snap-fit ​​block. Detailed Implementation

[0035] 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.

[0036] 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 belongs; the terminology used herein in the specification of the application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

[0037] The terms "comprising" and "having," and any variations thereof, used in the specification, claims, and drawings of this application are intended to cover without excluding other meanings. The words "a" or "an" do not exclude the presence of multiples.

[0038] 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.

[0039] 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 represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, the character " / " in this article generally indicates that the preceding and following related objects have an "or" relationship.

[0040] 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, terms such as "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the figures. They are used 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.

[0041] Furthermore, the descriptions of directions such as the X direction, Y direction, and Z direction used to explain the operation and construction of the components in this embodiment are not absolute but relative. Although these directions are appropriate when the components are in the positions shown in the figure, they should be interpreted differently when these positions change to correspond to the changes.

[0042] 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.

[0043] 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).

[0044] In the description of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linkage" should be interpreted broadly. For example, "connection" or "linkage" in mechanical structures can refer to a physical connection, such as a fixed connection, for example, a connection fixed by fasteners, such as a connection fixed by screws, bolts, or other fasteners; 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. In circuit structures, "connection" or "linkage" can refer not only to a physical connection but also to an electrical connection or a signal connection. For example, it can be a direct connection, i.e., a physical connection, or an indirect connection through at least one intermediate component, as long as the circuit is connected; it can also refer to the internal connection of two components. Signal connection can refer not only to signal connection through a circuit but also to signal connection through a media, such as radio waves. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0045] The opening and closing of a circuit breaker can be achieved through either electric or manual operation. Therefore, the device used to achieve this operation may include a drive motor and transmission gears. The rotation of the drive motor's output shaft enables electric operation, while the rotation of the transmission gears and the connected operating handle enables manual operation.

[0046] In related technologies, when operators perform manual operations simultaneously while the circuit breaker is being electrically operated, it can damage the motor and potentially injure the operator.

[0047] Specifically, the drive motor in a circuit breaker is generally designed for forward rotation. In some cases, when manually operating the forward rotation to drive the output shaft of the drive motor, the operator needs to manually overcome the internal mechanical resistance and static friction of the drive motor, which can easily damage the drive motor. In other cases, when manually operating the reverse rotation to drive the output shaft of the forward-rotating drive motor, the opposing force can also damage the drive motor, and the reaction force of the drive motor can injure the operator.

[0048] Since manual operation actually involves the handle driving the transmission gear, there is an urgent need for a structure that ensures the forward or reverse rotation of the transmission gear does not affect the forward rotation of the drive motor output shaft.

[0049] Based on this, this application provides a switching device and a circuit breaker. By setting an anti-reverse structure between the transmission gear and the drive motor, the rotation of the transmission gear cannot affect the rotation of the drive motor output shaft, thereby ensuring the service life of the drive motor, reducing the maintenance cost of the circuit breaker, and improving the safety of manual operation by operators. The following is in conjunction with... Figure 1-8 Please provide a detailed explanation.

[0050] Firstly, this application provides a circuit breaker opening and closing device 100. Figure 1 and Figure 2 As shown, the circuit breaker opening and closing device 100 includes a drive motor 1, an anti-reverse structure 3, and a transmission gear 2. The drive motor 1 is installed in the circuit breaker and is used to drive the circuit breaker to perform opening and closing operations. The anti-reverse structure 3 includes a bracket 31 and a snap-fit ​​shaft 32. The bracket 31 is fixedly connected to the output shaft 11 of the drive motor 1, so that the anti-reverse structure 3 rotates together with the output shaft 11. The snap-fit ​​shaft 32 is elastically connected to the bracket 31. The transmission gear 2 is rotatably connected to the output shaft 11, so that the transmission gear 2 can rotate relative to the drive motor 1. A countersunk hole 21 is provided on the side of the transmission gear 2 away from the drive motor 1, and the countersunk hole 21 is used to accommodate the anti-reverse structure 3. A first groove 23 is provided on the wall of the countersunk hole 21. The depth of the first groove 23 increases linearly in the clockwise direction, so that the end of the first groove 23 forms a stepped surface 24 with an angle to the groove wall. The first end 321 of the snap-fit ​​shaft 32 points to the groove wall of the first groove 23, and the first end 321 rotates within the first groove 23. When the first end 321 abuts against the stepped surface 24, the output shaft 11, the bracket 31 and the transmission gear 2 can rotate together in a clockwise direction.

[0051] Among them, such as Figure 3 As shown, the drive motor 1 can receive signals from the circuit board, which are used to control the output shaft 11 of the drive motor 1 to rotate. For example, the signal from the circuit board is preset to control the output shaft 11 to rotate clockwise.

[0052] The transmission gear 2 can be linked with an operating handle located outside the circuit breaker, allowing the operator to control the rotation of the transmission gear 2 via the operating handle. For example, a gear set for transmission can be connected between the operating handle and the transmission gear 2, enabling the operation of the operating handle to be transmitted to the transmission gear 2 via the gear set, thereby causing the transmission gear 2 to rotate.

[0053] Among them, such as Figure 2As shown, the anti-reverse structure 3 refers to the component consisting of the bracket 31 and the snap-fit ​​shaft 32 used to limit the rotation of the transmission gear 2. Specifically, a spring can be used to cooperate with the snap-fit ​​shaft 32 to achieve an elastic connection between the snap-fit ​​shaft 32 and the bracket 31. The snap-fit ​​shaft 32 is stretched by the elastic connection, so that the first end 321 of the snap-fit ​​shaft 32 can slide along the first groove 23.

[0054] Among them, such as Figure 4 As shown, the countersunk hole 21 refers to the stepped groove machined on the end face of the transmission gear 2, which can be formed by milling. It is used to accommodate the anti-reverse structure 3 and limit its radial displacement.

[0055] Among them, such as Figure 4 As shown, the first groove 23 refers to the spiral groove on the inner wall of the countersunk hole 21, which can be machined by wire cutting. The stepped surface 24 formed by its gradually changing depth is used to form a one-way locking with the locking shaft 32. The stepped surface 24 refers to the inclined plane formed at the end of the first groove 23, which can be achieved by adjusting the groove machining angle, and is used to form a surface contact with the end of the locking shaft 32.

[0056] Specifically, when the output shaft 11 of the drive motor 1 drives the bracket 31 to rotate clockwise, the first end 321 of the locking shaft 32 gradually embeds into the stepped surface 24 as the groove depth increases, forming a rigid contact between the first end 321 and the stepped surface 24, causing the transmission gear 2 to rotate synchronously with the output shaft 11. When the transmission gear 2 rotates, the operating handle linked to it also rotates. At this time, the operator can judge whether the circuit breaker is performing opening and closing actions by observing the rotation of the operating handle, thereby determining the current state of the circuit breaker.

[0057] Furthermore, when the first end 321 of the locking shaft 32 is engaged with the stepped surface 24, and the transmission gear 2 cannot provide the torque required for the output shaft 11 to rotate, the transmission gear 2 cannot rotate in the opposite direction to the output shaft 11. In other words, the transmission gear 2 cannot rotate counterclockwise. Thus, when the output shaft 11 of the drive motor 1 rotates clockwise, the operator can avoid controlling the transmission gear 2 to rotate counterclockwise through the operating handle.

[0058] Furthermore, when the operator controls the transmission gear 2 to rotate clockwise via the operating handle, the first end 321 of the locking shaft 32 moves in the direction of decreasing groove depth, disengaging from the step surface 24, allowing the transmission gear 2 to rotate independently relative to the bracket 31. Therefore, when the output shaft 11 of the drive motor 1 rotates clockwise, the rotational torque of the transmission gear 2 cannot be transmitted to the output shaft 11 of the drive motor 1 via the locking shaft 32, thereby preventing the drive motor 1 from being driven to operate.

[0059] According to the description of the first aspect of this application, an anti-reverse rotation structure 3 is provided between the output shaft 11 of the drive motor 1 and the transmission gear 2. The stepped surface 24 formed by the change in depth of the first groove 23 in the transmission gear 2 is used to abut against the first end 321 of the locking shaft 32 in the anti-reverse rotation structure 3, so that the transmission gear 2 can rotate clockwise with the output shaft 11, and the transmission gear 2 cannot provide the torque required for the rotation of the output shaft 11, so the transmission gear 2 cannot drive the output shaft 11 to rotate counterclockwise. In addition, the elastic connection between the locking shaft 32 and the bracket 31 allows the first end 321 to slide along the first groove 23, so that the transmission gear 2 can rotate independently relative to the bracket 31. When the transmission gear 2 rotates independently clockwise, the first end 321 of the locking shaft 32 moves in the direction of decreasing groove depth, disengages from the step surface 24, and the rotational torque of the transmission gear 2 cannot be transmitted to the output shaft 11 of the drive motor 1 through the locking shaft 32, thereby preventing the motor from being driven. In summary, neither clockwise nor counterclockwise rotation of the transmission gear 2 can affect the operation of the drive motor 1, preventing operators from performing manual operations simultaneously while the circuit breaker is being electrically operated. This ensures the service life of the drive motor 1, reduces the maintenance cost of the circuit breaker, and improves the safety of manual operation by the operator.

[0060] Furthermore, in some embodiments, such as Figure 5 As shown, multiple snap-fit ​​shafts 32 are connected to the bracket 31. Multiple first grooves 23 are formed on the hole wall. The snap-fit ​​shafts 32 correspond one-to-one with the corresponding first grooves 23, so that the multiple first ends 321 abut against the multiple stepped surfaces 24.

[0061] Among them, the multiple snap-fit ​​shafts 32 refer to multiple independent elastic connecting components distributed on the bracket 31. Specifically, they can be implemented using cylindrical pins or wedge block structures, and each snap-fit ​​shaft 32 can move independently through elastic connection.

[0062] The multiple first grooves 23 refer to multiple grooves with gradually varying depths provided on the inner wall of the countersunk hole 21 of the transmission gear 2. The depth of each first groove 23 increases in a clockwise direction to form a stepped surface 24. The one-to-one correspondence between the locking shaft 32 and the first groove 23 means that the movement path of each locking shaft 32 is constrained by only one corresponding first groove 23.

[0063] Specifically, when the drive motor 1 drives the bracket 31 to rotate, the first ends 321 of the multiple locking shafts 32 respectively enter the corresponding first grooves 23 and slide along the direction of increasing groove depth. Since each groove is set independently, the movement trajectories of each locking shaft 32 do not overlap, avoiding jamming or collision due to path intersection. When the first end 321 of the locking shaft 32 contacts the stepped surface 24, the multiple locking shafts 32 simultaneously form surface contact with the stepped surface 24, at which time the output shaft 11, the bracket 31, and the transmission gear 2 rotate synchronously.

[0064] As described in the above embodiments, multiple locking shafts 32 are designed on the bracket 31, and multiple first grooves 23 corresponding to the locking shafts 32 are designed on the transmission gear 2. In this case, the connection between the transmission gear 2 and the bracket 31 is a multi-point contact connection. The stress generated by the locking shafts 32 and the stepped surface 24 engaging with each other is dispersed to the aforementioned multiple contact points, thereby reducing the risk of local stress concentration in the locking shafts 32 and the transmission gear 2, and improving the overall structural strength of the opening and closing device 100. Furthermore, the structure in which each locking shaft 32 is independently embedded in its corresponding first groove 23 ensures that even if one locking shaft 32 cannot be locked due to wear or failure, the remaining locking shafts 32 can still maintain their anti-reverse function, ensuring that the circuit breaker can stably achieve the anti-reverse function under both electric and manual operation.

[0065] Furthermore, in some embodiments, such as Figure 6 As shown, the bracket 31 includes a first connecting portion 311 and a second connecting portion 312. The first connecting portion 311 is disposed at the bottom of the countersunk hole 21. The second connecting portion 312 is fixedly connected to the first connecting portion 311 and is perpendicular to the first connecting portion 311. The first connecting portion 311 is provided with a first connecting hole 313 for passing through the output shaft 11, and the output shaft 11 is locked in the first connecting hole 313. The second connecting portion 312 is provided with a second connecting hole 314 for passing through the snap-fit ​​shaft 32.

[0066] The first connecting part 311 refers to the plate-like structure embedded in the bottom of the countersunk hole 21 of the transmission gear 2. Specifically, it can be made of stamped metal sheet, used to fix the bracket 31 and provide a position for the connection between the output shaft 11 and the bracket 31.

[0067] The second connecting part 312 refers to a plate-like structure perpendicular to the first connecting part 311. Specifically, it can be fixed to the first connecting part 311 by welding to provide an mounting surface for the snap-fit ​​shaft 32.

[0068] The first connecting hole 313 refers to a hole-like structure formed on the first connecting part 311, which is used to form a hole-shaft connection with the output shaft 11.

[0069] The second connecting hole 314 refers to a hole-like structure opened on the second connecting part 312, which is used to constrain the radial displacement of the snap-fit ​​shaft 32.

[0070] Specifically, the first connecting part 311 is embedded in the bottom of the countersunk hole 21, so that the position of the bracket 31 is relatively fixed, so that the output shaft 11 can pass through the first connecting hole 313 provided on the first connecting part 311, so that the torque of the output shaft 11 can be transmitted through the first connecting part 311, thereby enabling the output shaft 11 to drive the bracket 31 to rotate together. Further, the wall of the first engraved hole on the transmission gear 2 is perpendicular to the cross section of the output shaft 11, and the second connecting part 312 is perpendicular to the first connecting part 311, so that the snap-fit ​​shaft 32 abutting against the hole wall can pass through the second connecting hole 314 provided on the second connecting part 312, so that the snap-fit ​​shaft 32 is restricted in radial displacement and maintains axial freedom in the second connecting hole 314, so that the first end 321 always abuts against the groove wall of the first groove 23 under the elastic force of the elastic connection.

[0071] According to the description of the above embodiment, the first connecting part 311 in the bracket 31 is used to fix the position of the bracket 31, and the bracket 31 is connected to the output shaft 11 through the first connecting hole 313 provided on the first connecting part 311. The second connecting part 312 is vertically connected to the first connecting part 311, and the second connecting part 312 is provided with a second connecting hole 314, so that the output shaft 11 can pass through the first connecting hole 313, and the snap-fit ​​shaft 32 can also pass through the second connecting hole 314, so that the first end 321 of the snap-fit ​​shaft 32 can abut against the groove wall of the first groove 23, ensuring that the circuit breaker can realize the anti-reverse function.

[0072] Furthermore, in some embodiments, such as Figure 3 and Figure 6 As shown, the first connecting hole 313 is a quadrilateral hole with two symmetrical arc-shaped sides and two straight sides. The output shaft 11 is a quadrilateral shaft with two symmetrical arc-shaped sides and two straight sides. The quadrilateral shaft passes through the quadrilateral hole, preventing the quadrilateral shaft from rotating within the quadrilateral hole.

[0073] Among them, a quadrilateral hole with two symmetrical arc-shaped sides and two straight sides refers to a non-circular through hole whose inner contour is enclosed by two symmetrical arc-shaped sides and two parallel straight sides.

[0074] Among them, the quadrilateral shaft with two symmetrical arc sides and two straight sides refers to a columnar structure whose outer contour perfectly matches the aforementioned quadrilateral hole.

[0075] Specifically, the output shaft 11 of the drive motor 1 is a quadrilateral shaft with two symmetrical arc sides and two straight sides. The symmetrical arc sides allow the output shaft 11 to be rotatably connected to a circular hole with an inner diameter larger than the inner diameter of the arc sides. In other words, the transmission gear 2 can be rotatably connected to the output shaft 11. Furthermore, when the output shaft 11 is inserted into the quadrilateral hole with two symmetrical arc sides and two straight sides, the straight sides of the output shaft 11 form surface contact with the straight sides of the hole, preventing relative rotation of the output shaft 11 within the quadrilateral hole.

[0076] Therefore, the first connecting hole 313 is a quadrilateral hole with two symmetrical arc sides and two straight sides, which can prevent the output shaft 11 from rotating relative to the bracket 313, thereby ensuring that the output shaft 11 rotates synchronously with the bracket 31.

[0077] According to the description of the above embodiment, the first connecting hole 313 is a quadrilateral hole with two symmetrical arc sides and two straight sides, and the output shaft 11 is a quadrilateral shaft with two symmetrical arc sides and two straight sides. The output shaft 11 passes through the first connecting hole 313, and the straight side of the output shaft 11 forms a surface contact with the straight side of the first connecting hole 313, so as to avoid relative rotation of the output shaft 11 in the first connecting hole 313, thereby ensuring the reliability of the linkage between the output shaft 11 and the bracket 31.

[0078] Furthermore, in some embodiments, such as Figure 2 As shown, the anti-reverse structure 3 also includes an elastic element 33. The deformation direction of the elastic element 33 is the direction in which the first end 321 points towards the groove wall. The first end 321 is provided with an abutment structure, and one end of the elastic element 33 abuts against the abutment structure. The other end of the elastic element 33 abuts against one side of the second connecting portion 312. Alternatively, the end of the output shaft 11 extends out of the first connecting hole 313 and is located on the other side of the second connecting portion 312. The other end of the elastic element 33 passes through the second connecting hole 314 and abuts against the straight edge of the output shaft 11.

[0079] The elastic element 33 refers to a component that applies elastic force to the snap-fit ​​shaft 32 through elastic deformation, so that the first end 321 of the snap-fit ​​shaft 32 is always pressed tightly within the first groove 23 of the countersunk hole 21. Specifically, the elastic element 33 can be a spring.

[0080] The abutment structure refers to the limiting component set at the first end 321 of the snap-fit ​​shaft 32. Specifically, it can be implemented by a boss or a groove. Its function is to provide a stable support point for the elastic element 33 to prevent the elastic element 33 from shifting, thereby preventing the direction of the elastic force applied to the snap-fit ​​shaft 32 from shifting, and thus preventing the first end 321 from generating offset friction with the groove wall of the first groove 23.

[0081] The other end of the elastic element 33 abuts against a structural component located away from the first end 321 of the snap-fit ​​shaft 32, which extends along the direction of the snap-fit ​​shaft 32. This allows the structural component to provide a compressive supporting force to the elastic element 33, enabling the elastic element 33 to smoothly undergo elastic deformation. Figure 1 As shown, the structural member that is arranged along the extension direction of the snap-fit ​​shaft 32 and away from the first end 321 of the snap-fit ​​shaft 32 can be the second connecting part 312 or the output shaft 11. Therefore, the other end of the elastic member 33 can abut against the second connecting part 312 or the output shaft 11.

[0082] It should be noted that the elastic member 33 passes through the second connecting hole 314, and the end of the output shaft 11 extends out of the first connecting hole 313 and is located on the other side of the second connecting part 312, so that the other end of the elastic member 33 can pass through the second connecting part 312 and abut against the straight edge of the output shaft 11, and the straight edge forms a surface contact with the other end of the elastic member 33, thereby providing support for the elastic member 33.

[0083] According to the description of the above embodiments, the elastic member 33 is used to realize the elastic connection between the snap-fit ​​shaft 32 and the bracket 31. The abutment structure is used to limit the displacement of the elastic member 33, and to prevent the offset force from causing offset friction between the first end 321 of the snap-fit ​​shaft 32 and the groove wall of the first groove 23, thereby improving the reliability of the anti-reverse mechanism 3.

[0084] Furthermore, in some embodiments, such as Figure 7 As shown, the snap-fit ​​shaft 32 can be a cylindrical structure with one end open. The elastic member 33 passes through the opening and is installed inside the cylindrical structure, with one end of the elastic member 33 abutting against the cylindrical wall opposite to the opening. In addition, an annular protrusion 322 is provided at the opening, surrounding the cylindrical wall.

[0085] The cylindrical wall opposite to the opening may have a groove, and one end of the elastic member 33 is engaged in the groove, so that the groove acts as an abutment structure to limit the displacement of the elastic member 33.

[0086] The inner diameter of the annular protrusion 322 is larger than the inner diameter of the second connecting hole 314, so that the annular protrusion 322 cannot pass through the second connecting hole 314, thereby limiting the axial displacement of the snap-fit ​​shaft 32 and preventing the snap-fit ​​shaft 32 from coming out of the second connecting hole 314 and causing the anti-reverse function to fail.

[0087] Furthermore, in some embodiments, such as Figure 4 As shown, a third connecting hole 22 is provided at the bottom of the countersunk hole 21. The output shaft 11 passes through the third connecting hole 22, so that the transmission gear 2 is rotatably connected to the output shaft 11. The third connecting hole 22 corresponds to the first connecting hole 313, so that the output shaft 11 passes through both the first connecting hole 313 and the third connecting hole 22.

[0088] The third connecting hole 22 can be a circular through hole set at the bottom of the countersunk hole 21 of the transmission gear 2, for passing through the output shaft 11.

[0089] Specifically, the output shaft 11 includes two symmetrical arc edges, allowing the third connecting hole 22 to rotate freely relative to the output shaft 11. As described above, the output shaft 11 can be simultaneously mounted on both the first connecting hole 313 and the third connecting hole 22, enabling the transmission gear 2 and the bracket 31 to be coaxially connected, thus saving installation space in the circuit breaker.

[0090] According to the description of the above embodiment, the output shaft 11 passes through the third connecting hole 22 opened at the bottom of the countersunk hole 21, so that the transmission gear 2 can be connected together with the bracket 31 to the output shaft 11 of the drive motor 1, saving the installation space of the circuit breaker and reducing the production cost of the circuit breaker.

[0091] Furthermore, in some embodiments, such as Figure 2 and Figure 8 As shown, the anti-reverse structure 3 also includes a limiting bolt 4 and a washer 5. A fourth connecting hole 12 is provided at the end of the output shaft 11. A fifth connecting hole 51 is provided on the washer 5. The limiting bolt 4 passes through both the fourth connecting hole 12 and the fifth connecting hole 51. The washer 5 is clamped between the limiting bolt 4 and the end of the output shaft 11.

[0092] Among them, the limit bolt 4 refers to the threaded fastener used to fix the bracket 31 and the transmission gear 2.

[0093] Among them, the gasket 5 refers to a thin metal sheet with elastic deformation capability, which is used to fasten the connection between the limit bolt 4 and the output shaft 11.

[0094] The fourth connecting hole 12 refers to the hole-like structure set at the end of the output shaft 11, which can be realized by using a round hole that is clearance-fitted with the limit bolt 4.

[0095] The fifth connecting hole 51 refers to the hole-like structure set on the gasket 5, which can be realized by using a round hole that is clearance-fitted with the limit bolt 4.

[0096] Specifically, when the limiting bolt 4 is tightened in the fourth connecting hole 12 and the washer 5 is pressed between the bolt and the end of the output shaft 11, the transmission gear 2 and the bracket 31, which are mounted on the output shaft 11, are both restricted by the washer 5 from displacement along the axial direction of the output shaft 11.

[0097] According to the description of the above embodiment, the limiting bolt 4 clamps the washer 5 to the end of the output shaft 11, making the connection between the limiting bolt 4 and the end of the output shaft 11 more secure. Furthermore, the washer 5 can limit the axial displacement of the transmission gear 2 and the bracket 31 on the output shaft 11, thereby enabling both the transmission gear 2 and the anti-reverse structure 3 to operate stably within the circuit breaker, thus achieving the functions of manual operation and anti-reverse operation of the circuit breaker.

[0098] Furthermore, in some embodiments, such as Figure 8 As shown, a pin 52 extending toward the first connecting portion 311 is connected to the pad 5. The first connecting portion 311 is provided with a slot 315. A snap-fit ​​block 53 adapted to the slot 315 is provided on the pin 52. The snap-fit ​​block 53 snaps into the slot 315.

[0099] Among them, pin 52 refers to a strip-shaped structure extending from the edge of pad 5 toward bracket 31. Specifically, it can be implemented by a one-piece structure formed by metal stamping, and its extension direction is parallel to the axis of transmission gear 2.

[0100] The slot 315 refers to the recessed area formed on the surface of the first connecting part 311, which can be formed into a rectangular groove by milling.

[0101] The snap-fit ​​block 53 refers to the protruding structure located at the end of the pin 52, which can be formed by partial bending or welding.

[0102] Specifically, pin 52 extends toward the first connecting portion 311, so that the snap-fit ​​block 53 provided on pin 52 can snap into the slot 315 opened in the first connecting portion 311. After the snap-fit ​​block 53 is embedded in the slot 315, it contacts the side wall of the slot 315, preventing the gasket 5 and the bracket 31 from shifting along the direction of the side wall of the slot 315.

[0103] According to the description of the above embodiment, the snap-fit ​​block 53 provided on the pin 52 is used to snap-fit ​​the slot 315 on the first connecting part 311 so that the pad 5 and the first connecting part 311 abut against each other in the direction of the side wall of the slot 315, thereby limiting the displacement of the bracket 31 in the direction of the side wall of the slot 315, further ensuring the stability of the bracket 31 in the circuit breaker, thereby ensuring the reliable operation of the anti-reverse structure 3.

[0104] Furthermore, in some embodiments, the gasket 5 can be riveted to the first connecting part 311 to make the contact between the snap block 53 and the slot 315 more stable, thereby further improving the stability of the bracket 31 in the circuit breaker and ensuring the reliable operation of the anti-reverse structure 3.

[0105] Furthermore, in some embodiments, there is a gap between the bottom of the snap-fit ​​block 53 and the bottom of the countersunk hole 21.

[0106] Among them, the snap-fit ​​block 53 is a protruding structure at the end of pin 52 of pad 5.

[0107] There is a gap between the locking block 53 and the bottom of the countersunk hole 21, so that the tightening force of the limit bolt 4 cannot be transmitted to the transmission gear 2 through the locking block 53, thus avoiding friction between the transmission gear 2 and the locking block 53, thereby ensuring that the transmission gear 2 can rotate normally.

[0108] According to the description of the above embodiments, the gap between the bottom of the locking block 53 and the bottom of the countersunk hole 21 can avoid friction between the transmission gear 2 and the locking block 53, solve the problem of the transmission gear 2 being obstructed due to friction during manual operation, reduce component wear, and extend the service life of the opening and closing device 100.

[0109] Secondly, this application provides a circuit breaker including the opening and closing device described in any of the above embodiments.

[0110] Those skilled in the art will understand that although some embodiments herein include certain features included in other embodiments but not others, combinations of features from different embodiments are intended to be within the scope of this application and form different embodiments. For example, in the claims, any of the claimed embodiments can be used in any combination.

[0111] The above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

Claims

1. A switching device, applied to a circuit breaker, characterized in that, include: Drive motor, anti-reverse structure and transmission gears; The drive motor is installed in the circuit breaker and is used to drive the circuit breaker to perform opening and closing operations. The anti-reverse rotation structure includes a bracket and a snap-fit ​​shaft. The bracket is fixedly connected to the output shaft of the drive motor, so that the anti-reverse rotation structure rotates together with the output shaft. The snap-fit ​​shaft is elastically connected to the bracket; The transmission gear is rotatably connected to the output shaft, enabling the transmission gear to rotate relative to the drive motor; The transmission gear has a countersunk hole on the side away from the drive motor, and the countersunk hole is used to accommodate the anti-reverse structure; The countersunk hole has a first groove on its wall. The depth of the first groove increases linearly in a clockwise direction, so that the end of the first groove forms a stepped surface with an angle to the groove wall. The first end of the snap-fit ​​shaft points to the groove wall of the first groove, and the first end rotates within the first groove; When the first end abuts against the stepped surface, the output shaft, the bracket, and the transmission gear can rotate together in a clockwise direction.

2. The opening and closing device according to claim 1, characterized in that, The bracket is connected to multiple snap-fit ​​shafts; The hole wall is provided with a plurality of the first grooves; The snap-fit ​​shaft corresponds one-to-one with the first groove, so that the multiple first ends abut against the multiple stepped surfaces.

3. The opening and closing device according to claim 2, characterized in that, The bracket includes a first connecting part and a second connecting part; The first connecting part is disposed at the bottom of the countersunk hole; The second connecting part is fixedly connected to the first connecting part, and the second connecting part is perpendicular to the first connecting part; The first connecting part is provided with a first connecting hole for the output shaft to pass through, and the output shaft is locked in the first connecting hole; The second connecting part is provided with a second connecting hole for inserting the snap-fit ​​shaft.

4. The opening and closing device according to claim 3, characterized in that, The first connecting hole is a quadrilateral hole with two symmetrical arc-shaped sides and two straight sides; The output shaft is a quadrilateral shaft with two symmetrical arc sides and two straight sides; The quadrilateral shaft passes through the quadrilateral hole, preventing the quadrilateral shaft from rotating within the quadrilateral hole.

5. The opening and closing device according to claim 4, characterized in that, The anti-reverse structure also includes an elastic element; The deformation direction of the elastic element is the direction from the first end to the groove wall; The first end is provided with an abutment structure, and one end of the elastic member abuts against the abutment structure; The other end of the elastic element abuts against one side of the second connecting portion; or, The end of the output shaft extends out of the first connecting hole and is located on the other side of the second connecting part; The other end of the elastic element passes through the second connecting hole and abuts against the straight side of the output shaft.

6. The opening and closing device according to any one of claims 3-5, characterized in that, A third connecting hole is provided at the bottom of the countersunk hole; The output shaft passes through the third connecting hole, so that the transmission gear is rotatably connected to the output shaft; The third connecting hole corresponds to the first connecting hole, so that the output shaft passes through both the first connecting hole and the third connecting hole simultaneously.

7. The opening and closing device according to claim 6, characterized in that, The anti-reverse structure also includes a limiting bolt and a washer; The output shaft has a fourth connecting hole at its end; The gasket has a fifth connection hole; The limiting bolt is simultaneously inserted into the fourth connecting hole and the fifth connecting hole; The gasket is clamped between the limiting bolt and the end of the output shaft.

8. The opening and closing device according to claim 7, characterized in that, The pad is connected to pins extending toward the first connection portion; The first connecting part is provided with a slot; The pin is provided with a card slot. The snap-fit ​​block snaps into the slot.

9. The opening and closing device according to claim 8, characterized in that, There is a gap between the bottom of the snap-fit ​​block and the bottom of the countersunk hole.

10. A circuit breaker, characterized in that, The device includes the opening and closing mechanism according to any one of claims 1-9.

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