Anti-rebound operating mechanism

Abstract

The application discloses a bounce-proof operating mechanism, which is provided with a conversion lever and a locking assembly. The conversion lever drives the locking assembly to rotate between a lever locking position and a lever unlocking position. When the lever locking position is reached, bounce of a main shaft during opening is prevented, arc re-ignition or failure to be extinguished in time caused by bounce of the main shaft is effectively prevented, and the breaking reliability and success rate of a circuit breaker are remarkably improved, especially in the case of breaking of large current or short-circuit current. When closing, the conversion lever is directly or indirectly driven to rotate to the lever unlocking position by an energy storage mechanism, and the main shaft is avoided to realize normal closing.

Description

Technical Field

[0001] This utility model relates to the field of low-voltage electrical appliances, specifically to an anti-rebound operating mechanism. Background Technology

[0002] The anti-rebound mechanism of a frame-type circuit breaker operating mechanism is mainly used to prevent problems such as poor contact and operational failure caused by the rebound of the mechanism during the circuit breaker's opening process. Currently, some anti-rebound mechanisms on the market mainly achieve this effect through inertia locking, as seen in Chinese patent applications CN107481897A, CN202058671 U, and CN219534441 U. These typically include a blocking component and a return spring. The inertia of the blocking component during opening overcomes the spring force of the return spring, interlocking with the operating mechanism to prevent contact rebound. However, this structure is prone to the following problems: The biggest issue with the inertia locking method is its limited response speed. After the main shaft is triggered, the inertia locking relies on its own inertia to move to the position that suppresses the main shaft's rebound. If the impact velocity or inertial force at the moment of circuit breaker opening does not reach the design threshold, the inertia locking may experience a delay in action or fail to reach its intended position, affecting the timeliness of the anti-rebound mechanism. Furthermore, existing anti-rebound mechanisms themselves generate rigid collisions during operation, which can easily lead to damage. Utility Model Content

[0003] The purpose of this utility model is to overcome at least one defect of the prior art and provide an anti-rebound operating mechanism.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] An anti-rebound operating mechanism includes a bracket, a main shaft, a linkage mechanism, an energy storage shaft, a cam mechanism, and an energy storage mechanism. The bracket includes two side plates, and the main shaft and the energy storage shaft are rotatably mounted on the two side plates. The linkage mechanism, the cam mechanism, and the energy storage mechanism are mounted between the two side plates. The main shaft is used to connect to a moving contact and can rotate between a main shaft closed position and a main shaft open position. The linkage mechanism is connected to the main shaft. The cam mechanism is fixed on the energy storage shaft and is used to drive the energy storage mechanism to store energy. The energy storage mechanism is used to drive the main shaft to rotate to the main shaft closed position.

[0006] It also includes a locking mechanism and an anti-rebound latch connected to the main shaft. The locking mechanism includes a rotatably mounted conversion lever and a locking component. The locking component is mounted on the conversion lever and rotates with the conversion lever between the lever locking position and the lever unlocking position. When the conversion lever is in the lever locking position, the locking component locks the anti-rebound latch, preventing the main shaft from rotating from the main shaft open position to the main shaft closed position. When the conversion lever is in the lever unlocking position, the locking component avoids the anti-rebound latch, and the main shaft can rotate from the main shaft open position to the main shaft closed position.

[0007] When the main shaft is in the main shaft open position and the energy storage mechanism is in the energy storage state, the energy release of the energy storage mechanism will directly or indirectly drive the conversion lever to rotate from the lever locked position to the lever unlocked position, and the energy release of the energy storage mechanism will drive the linkage mechanism to drive the main shaft to rotate from the main shaft open position to the main shaft closed position.

[0008] Preferably, the locking component includes:

[0009] The locking tongue is rotatable relative to the conversion lever and includes a rotating part and a locking part that swings about the axis of the rotating part. The locking part is used to engage with the locking claw on the anti-rebound lock for limiting.

[0010] A buffer spring, connected to the locking tongue, is used to drive the locking part to reset;

[0011] The anti-rebound latch is mounted on the main shaft, and the anti-rebound latch is provided with a locking claw for limiting the locking tongue.

[0012] Preferably, when the switching lever is in the lever locked position, the locking tongue is located on the first trajectory A of the locking pawl as it rotates with the main shaft; during the rotation of the main shaft from the main shaft closed position to the main shaft open position, the main shaft drives the end of the locking pawl to push the locking part, causing the locking tongue to compress the buffer spring and rotate to make room.

[0013] After the main shaft rotates to the main shaft open position, the end of the locking claw is misaligned with the locking part and the buffer spring is released, so that the locking tongue is reset under the drive of the buffer spring, which drives the locking part to rotate to the side of the locking claw. When the main shaft rotates to the main shaft open position and a collision occurs, the end of the locking claw contacts the locking tongue. The locking part limits the end of the locking claw and prevents the main shaft from rebounding.

[0014] During the rotation of the main shaft from the main shaft open position to the main shaft closed position, the energy storage mechanism drives the conversion lever to rotate to the lever unlock position, causing the locking tongue to move away from the end of the locking claw along the first trajectory A of the main shaft rotation. The energy storage mechanism then drives the main shaft to rotate to the main shaft closed position.

[0015] Preferably, the locking mechanism further includes a return spring for driving the switching lever to rotate from the lever unlock position to the lever lock position.

[0016] Preferably, when the energy storage mechanism releases energy, it drives a cam mechanism, an energy storage shaft, or a linkage mechanism, which in turn drives the conversion lever to rotate from the lever locked position to the lever unlocked position.

[0017] Preferably, the energy storage mechanism includes a closing half-shaft, an energy storage spring, and a locking lever. The energy storage shaft drives the energy storage spring to store energy through a cam mechanism, and the closing half-shaft locks the energy storage mechanism in the energy storage state through a limiting locking lever. The closing half-shaft can limit the switching lever, locking the switching lever in the lever locked position, so that the switching lever cannot rotate from the lever locked position to the lever unlocked position. When the closing half-shaft rotates to release the limiting of the locking lever and release the energy storage mechanism, the closing half-shaft simultaneously releases the locking of the switching lever.

[0018] Preferably, when the cam mechanism compresses the energy storage spring, it pushes the closing half-shaft of the switching lever and the limit switching lever to press against the cam mechanism; when the closing half-shaft releases the lock on the switching lever, the switching lever is pushed by the cam mechanism to quickly rotate to the lever unlock position.

[0019] Preferably, the switching lever includes a pivot portion and a first transmission portion and a second transmission portion located on both sides of the pivot portion. The first transmission portion cooperates with the closing half shaft, and the cam mechanism drives the switching lever to rotate through the second transmission portion.

[0020] Preferably, it also includes a locking element and a return spring. The locking element is mounted on the bracket to prevent the switching lever from rotating. The return spring is connected between the switching lever and the bracket and applies a force to the switching lever to rotate toward the locking element, so that the switching lever abuts against the locking element.

[0021] Preferably, the pivot part is rotatably connected to the bracket and is disposed between the closing half shaft and the cam mechanism; the first transmission part is inserted between the closing half shaft and the locking member; the second transmission part is inserted between the cam mechanism and the return spring, the return spring is connected between the second transmission part and the bracket, the cam mechanism pushes the second transmission part to rotate against the action of the return spring, drives the first transmission part to press against the blocking part of the closing half shaft, or drives the first transmission part to rotate through the release groove of the closing half shaft to the lever unlocking position.

[0022] Preferably, the locking assembly further includes a locking seat fixedly mounted on the conversion lever. The locking tongue is rotatably connected to the locking seat. The locking seat includes two side mounting plates arranged opposite each other and an upper mounting plate vertically arranged between the two side mounting plates. The two side mounting plates are respectively mounted on a mounting shaft and connected to the conversion lever through the mounting shaft. The upper mounting plate is connected to the side mounting plates on both sides respectively. The upper mounting plate is arranged opposite to the locking tongue. A buffer spring is connected between the upper mounting plate and the locking tongue. The side mounting plate is provided with a guide groove, and the end of the locking part is inserted into the guide groove for sliding engagement.

[0023] Preferably, the conversion lever and locking assembly are disposed on opposite sides of one of the side plates, and the corresponding side plate is provided with a slide groove for the mounting shaft to pass through. When the conversion lever rotates between the lever locking position and the lever unlocking position, the mounting shaft slides along the slide groove.

[0024] Preferably, the distance from the end of the locking claw to the axis of the main shaft is greater than the distance from the end of the locking part to the axis of the rotating part.

[0025] Preferably, the locking lever and the switching lever are the same element.

[0026] Preferably, the closing half-shaft includes a release groove and a blocking part arranged radially. When the blocking part is opposite to the switching lever, the blocking part limits the switching lever to the lever locked position and prevents the switching lever from rotating to the lever unlocked position. When the release groove is opposite to the switching lever, the switching lever can rotate through the release groove and rotate from the lever locked position to the lever unlocked position.

[0027] Preferably, the cam mechanism is provided with a rotatable roller, and when the cam mechanism rotates with the energy storage shaft, it drives the roller to push the conversion lever.

[0028] Preferably, the cam mechanism includes a cam plate and a support plate arranged opposite to each other, which are connected by a plurality of pins arranged in a curve. The pin farthest from the energy storage axis is provided with the roller. The conversion lever is inserted between the cam plate and the support plate and rolls in cooperation with the roller.

[0029] Preferably, the anti-rebound latch includes a fixed part sleeved on the main shaft, and a first extension and a second extension connected together. The first extension is connected between the fixed part and the second extension. A third clearance groove for avoiding the locking tongue is formed at the connection between the first extension and the second extension. A locking claw is provided at the end of the second extension away from the first extension. A fourth clearance groove for avoiding the locking tongue is provided in the middle of the second extension.

[0030] The anti-rebound mechanism of this application is equipped with a switching lever and a locking component. The switching lever drives the locking component to rotate between the lever locked position and the lever unlocked position. When the lever is locked, it prevents the main shaft from rebounding when it is tripping, effectively preventing the arc from reigniting or failing to extinguish in time due to the main shaft rebound. Especially in the case of breaking high current or short-circuit current, it significantly improves the breaking reliability and success rate of the circuit breaker. When closing, the energy storage mechanism releases energy to directly or indirectly drive the switching lever to rotate to the lever unlocked position, avoiding the main shaft and achieving normal closing.

[0031] Furthermore, the locking assembly includes a locking tongue and a buffer spring. The locking tongue includes a rotating part and a locking part that swings around the axis of the rotating part. When the main shaft approaches the main shaft open position, the locking pawl will push the locking part to move aside. When the main shaft reaches the main shaft open position, the locking tongue and the locking pawl of the anti-rebound latch immediately interlock. Once the main shaft has a tendency to rebound, the locking part of the locking tongue will immediately block the locking pawl and prevent the main shaft from rebounding. This completely eliminates the risk of secondary contact or proximity of the moving and stationary contacts caused by the collision rebound after the moving contacts are separated. It effectively prevents the arc from reigniting or failing to extinguish in time due to the rebound of the main shaft, especially in the case of high current or short circuit current interruption.

[0032] In addition, the closing half-shaft not only serves to release the energy storage spring, but also functions as a limit and clearance conversion lever. It can only be rotated to the lever unlock position when the closing operation is performed, which improves the reliability of the locking mechanism. Moreover, when the closing half-shaft limits the conversion lever, it locks the conversion lever in the lever locking position, which can offset the springback force of the main shaft through the closing half-shaft and reliably suppress the springback of the main shaft.

[0033] Furthermore, when the cam mechanism has finished storing energy for the energy storage spring, i.e., when the energy storage spring is in the energy storage state, the energy storage spring drives the cam mechanism to push the conversion lever, so that the conversion lever is pressed against the closing half shaft of the limit conversion lever. At the same time, the conversion lever locks the energy storage spring in reverse through the cam mechanism. When the closing half shaft releases the lock on the conversion lever, the conversion lever is pushed by the cam mechanism to quickly rotate to the lever unlock position, and at the same time releases the limit on the main shaft and the cam mechanism. Then, the energy storage mechanism drives the linkage mechanism to drive the main shaft to rotate from the main shaft open position to the main shaft closed position. At this time, the locking tongue will not limit the main shaft, ensuring that the main shaft can be closed smoothly. The entire closing process does not require other parts or program control of the action sequence. Attached Figure Description

[0034] Figure 1 This is a structural diagram of the operating mechanism;

[0035] Figure 2 This is a schematic diagram of the internal structure of the operating mechanism;

[0036] Figure 3 This is a schematic diagram showing the operation mechanism after it has been closed and energy storage is complete.

[0037] Figure 4 yes Figure 3 Another view;

[0038] Figure 5 This is a schematic diagram showing the moment when the locking claw just contacts the locking tongue during the opening process of the operating mechanism;

[0039] Figure 6 This is a schematic diagram of the locking tongue resetting after the locking claw has just misaligned with the locking tongue during the opening process of the operating mechanism;

[0040] Figure 7 This is a schematic diagram showing the interlocking between the locking tongue and the locking claw after the locking tongue resets during the tripping process of the operating mechanism;

[0041] Figure 8 yes Figure 7 Another view;

[0042] Figure 9 This is a schematic diagram showing the separation of the locking tongue and locking claw during the closing process of the operating mechanism;

[0043] Figure 10 yes Figure 9 Another view;

[0044] Figure 11 This is a schematic diagram showing the operation mechanism before it closes and begins energy storage;

[0045] Figure 12 This is a schematic diagram of the closing half-shaft;

[0046] Figure 13 This is a schematic diagram of the cam mechanism;

[0047] Figure 14 This is a schematic diagram of the switching lever;

[0048] Figure 15 This is a structural diagram of the locking component;

[0049] Figure 16 This is a structural diagram of the side plate and locking mechanism;

[0050] Figure 17 This is the first preferred embodiment of the locking mechanism;

[0051] Figure 18 This is the second preferred embodiment of the latch;

[0052] In the diagram: A - First track, B - Second track, 2 - Locking assembly, 3 - Conversion lever, 4 - Locking element, 5 - Return spring, 11 - Main shaft, 12 - Side plate, 13 - Energy storage shaft, 14 - Cam mechanism, 15 - Closing half shaft, 21 - Locking tongue, 22 - Rotating part, 23 - Locking part, 24 - Buffer spring, 25 - Locking buckle, 26 - Locking claw, 27 - Mounting shaft, 30 - Pivoting part, 31 - First transmission part, 32 - Second transmission part, 111 - Cantilever, 112 - Limiting shaft, 121 - Slide groove, 141 - Roller, 142 - Cam plate 143-Support plate, 144-Pin shaft, 151-Blocking part, 152-Release groove, 16-Linkage mechanism, 161-Transmission component, 162-Energy storage rod, 163-Modible spring seat, 250-Fixing part, 251-First extension part, 252-Second extension part, 253-Third clearance groove, 254-Fourth clearance groove, 281-Side mounting plate, 282-Upper mounting plate, 283-Guide groove, 311-First clearance groove, 312-First limiting surface, 321-Locking groove, 322-Second clearance groove, 323-Second limiting surface. Detailed Implementation

[0053] The specific implementation of the anti-rebound operating mechanism of this utility model is further described below with reference to the embodiments shown in the accompanying drawings. The anti-rebound operating mechanism of this utility model is not limited to the description of the following embodiments.

[0054] like Figure 1-4 As shown, the anti-rebound operating mechanism of this embodiment is typically used in frame-type circuit breakers. A frame-type circuit breaker typically includes a base, within which multiple fixedly connected contact supports are arranged side-by-side. Each contact support has multiple moving contacts. An operating mechanism is located on the top side of the base. The operating mechanism includes a bracket, a main shaft 11, a linkage mechanism 16, an energy storage shaft 13, a cam mechanism 14, and an energy storage mechanism. The bracket includes two side plates 12, and the main shaft 11 and energy storage shaft 13 are rotatably mounted on the two side plates 12. The linkage mechanism 16, cam mechanism 14, and energy storage mechanism... Installed between two side plates 12, the main shaft 11 is used to connect with the moving contact and can rotate between the main shaft closed position and the main shaft open position, causing the moving contact to swing and contact or separate from the stationary contact. The linkage mechanism 16 is connected to the main shaft 11, and the main shaft 11 is provided with a cantilever 111 connected to the contact support. The moving contact is installed on the contact support. The cam mechanism 14 is fixed on the energy storage shaft 13 and is used to drive the energy storage mechanism to store energy. When the energy storage mechanism releases energy, it drives the linkage mechanism 16 to drive the main shaft 11 to rotate from the main shaft open position to the main shaft closed position.

[0055] The energy storage mechanism includes an energy storage spring, a closing half-shaft 15, and a locking lever (not shown in the figure). Before closing, the energy storage mechanism needs to store energy. During energy storage, the energy storage shaft 13 is driven manually or by an electric motor to rotate the cam mechanism 14. The cam mechanism 14 drives the energy storage spring to store energy. When the energy storage spring has finished storing energy, the closing half-shaft 15 limits the locking lever and locks the cam mechanism 14. The cam mechanism 14 prevents the energy storage spring from releasing energy, thereby locking the energy storage mechanism in the energy storage state and keeping the operating mechanism in a stable energy storage state. When the circuit breaker is in the open state and the energy storage mechanism is in the energy storage state, the closing half-shaft 15 can be driven to rotate by the closing button or the closing electromagnetic mechanism, so that the closing half-shaft 15 releases the limiting effect on the locking lever and releases the energy storage mechanism. The released energy storage mechanism drives the linkage mechanism 16 to drive the main shaft 11 to rotate from the main shaft open position to the main shaft closed position, driving the moving contact to contact the stationary contact and realize the closing. In this embodiment, the operating mechanism automatically starts energy storage after the circuit closure is completed. The energy storage shaft 13 is driven by a motor to ensure that energy storage is completed automatically before each circuit closure. Of course, manual operation can also be selected to drive the energy storage shaft 13 for energy storage.

[0056] The linkage mechanism 16 typically includes a transmission component 161 and a tripping half-shaft for locking the transmission component 161. When the tripping half-shaft locks the transmission component 161, the linkage mechanism 16 can drive the drive shaft 11 to rotate, causing the moving contact to contact and separate from the stationary contact, and storing energy in the tripping spring when the moving contact contacts the stationary contact. When the tripping half-shaft unlocks the transmission component 161, it releases the tripping spring. The released energy of the tripping spring drives the main shaft 11 to rotate from the main shaft closed position to the main shaft open position through the linkage mechanism 16, causing the moving contact to separate from the stationary contact. The tripping button or tripping electromagnetic mechanism can drive the tripping half-shaft to rotate to unlock the transmission component 161, realizing the tripping of the circuit breaker. The circuit breaker is also equipped with a protection mechanism. In the event of overload, short circuit, or other faults, the protection mechanism is triggered, which can drive the tripping half-shaft to unlock the transmission component 161. The operating mechanism is prior art in this field and will not be described in detail.

[0057] The main spindle 11 can be in the main spindle closed position. Figure 2-3 and main shaft open position Figure 7-8The main shaft 11 rotates, causing the moving contact to contact and separate from the stationary contact. Multiple cantilever arms 111 are also fixedly mounted on the main shaft 11, some of which are connected to the contacts via connecting rods. The operating mechanism also includes a limiting shaft 112. At least one cantilever arm 111 cooperates with the limiting shaft 112 to limit the main shaft 11's open position. When the circuit breaker interrupts a short-circuit current, the operating mechanism is triggered to trip. Specifically, the protection mechanism inside the circuit breaker triggers the tripping half-shaft to rotate, unlocking the transmission component 161 and releasing the opening spring. The operating mechanism, through the connecting rod mechanism 16, drives the main shaft 11 to rotate, causing the moving contact to separate from the stationary contact. When the main shaft 11 reaches the open position, it will rebound due to collision with the limiting shaft 112, causing the contacts to rebound, resulting in the arc not being extinguished in time or the arc reigniting, severely reducing the breaking performance. This embodiment provides two cantilever arms 111 for cooperating with the limiting shaft 112, which are arranged opposite each other on both sides of the operating mechanism.

[0058] like Figure 1-6 As shown, one improvement in this embodiment is the inclusion of an anti-rebound mechanism, which includes a locking mechanism and an anti-rebound latch 25 connected to the main shaft 11. The locking mechanism can lock the lever in the locked position. Figure 7 With lever unlock position Figure 9 The locking mechanism includes a rotating conversion lever 3 and a locking component 2. The locking component 2 is mounted on the conversion lever 3 and rotates with the conversion lever 3 between the lever locking position and the lever unlocking position.

[0059] When the switching lever 3 is in the lever locking position, the locking component 2 locks the anti-rebound latch 25 to prevent the main shaft 11 from rotating from the main shaft open position to the main shaft closed position, so as to prevent the main shaft 11 from rebounding when it is open.

[0060] When the switching lever 3 is in the lever unlocked position, the locking component 2 avoids the anti-rebound latch 25, and the main shaft 11 can rotate from the main shaft open position to the main shaft closed position.

[0061] When the main shaft 11 is in the main shaft open position and the energy storage mechanism is in the energy storage state, the energy storage mechanism releases energy to directly or indirectly drive the conversion lever 3 to rotate from the lever locked position to the lever unlocked position, and the energy storage mechanism releases energy to drive the linkage mechanism 16 to drive the main shaft 11 to rotate from the main shaft open position to the main shaft closed position.

[0062] The anti-rebound mechanism of this embodiment is provided with a switching lever 3 and a locking component 2. The switching lever 3 drives the locking component 2 to rotate between the lever locked position and the lever unlocked position. When the lever is locked, it prevents the main shaft 11 from rebounding when it is tripped, effectively preventing the arc from reigniting or failing to extinguish in time due to the rebound of the main shaft 11. Especially in the case of breaking large current or short circuit current, it significantly improves the breaking reliability and success rate of the circuit breaker. When closing, the energy storage mechanism releases energy to directly or indirectly drive the switching lever 3 to rotate to the lever unlocked position, avoiding the main shaft 11 to achieve normal closing.

[0063] Preferred, such as Figure 15 As shown, the locking component 2 includes:

[0064] The locking tongue 21 is rotatable relative to the conversion lever 3, and includes a rotating part 22 and a locking part 23 that swings about the axis of the rotating part 22. The locking part 23 is used to limit the engagement with the locking claw 26 on the anti-rebound lock 25.

[0065] The buffer spring 24 is connected to the locking tongue 21 and is used to drive the locking part 23 to reset.

[0066] The anti-rebound latch 25 is mounted on the main shaft 11, and the anti-rebound latch 25 is provided with a locking claw 26 for limiting the locking tongue 21.

[0067] In particular, such as Figure 5-7 As shown, when the switching lever 3 is in the lever locked position, the locking part 23 of the locking tongue 21 is located on the first trajectory A of the locking pawl 26 as it rotates with the main shaft 11, preparing the locking mechanism to prevent rebound during opening. During opening, that is, as the main shaft 11 rotates from the main shaft closed position to the main shaft open position, the main shaft 11 drives the end of the locking pawl 26 to push the locking part 23. Figure 5 The locking part 23 is located on the first trajectory A of the locking pawl 26 as it rotates with the main shaft 11, causing the locking tongue 21 to compress the buffer spring 24 and rotate to make way. Figure 6 After the main shaft 11 rotates to the main shaft open position, when the end of the locking pawl 26 is misaligned with the locking part 23... Figure 6 The end of the locking pawl 26 is located outside the second trajectory B of the locking part 23 as the locking tongue 21 rotates. The locking tongue 21 is reset under the drive of the buffer spring 24, which drives the locking part 23 to rotate to the side of the locking pawl 26. Figure 7 When the main shaft 11 rotates to the main shaft open position and rebounds due to a collision, the end of the locking pawl 26 contacts the locking tongue 21. Figure 7 The locking part 23 is located on the first trajectory A of the end of the locking pawl 26 as it rotates with the main shaft 11. The locking part 23 limits the end of the locking pawl 26 and prevents the main shaft 11 from springing back.

[0068] During the process of the energy storage mechanism releasing energy to drive the linkage mechanism 16 to drive the main shaft 11 to rotate from the main shaft open position to the main shaft closed position, the energy storage mechanism drives the conversion lever 3 to rotate to the lever unlock position, causing the locking tongue 21 to move away from the end of the locking claw 26 and follow the first trajectory A of the main shaft 11 to rotate. The energy storage mechanism drives the main shaft 11 to rotate to the main shaft closed position.

[0069] In this embodiment, the anti-rebound mechanism works as follows: when the main shaft 11 approaches the main shaft open position, the locking pawl 26 pushes the locking part 23 to move aside. When the main shaft 11 reaches the main shaft open position, the locking tongue 21 and the locking pawl 26 of the anti-rebound latch 25 immediately interlock. Once the main shaft 11 has a tendency to rebound, the locking part 23 of the locking tongue 21 will immediately block the locking pawl 26, preventing the main shaft 11 from rebounding. This completely eliminates the risk of secondary contact or proximity of the moving and stationary contacts caused by the collision rebound after the moving contacts are separated. It effectively prevents the arc from reigniting or failing to extinguish in time due to the rebound of the main shaft 11, especially in the case of high current or short circuit current interruption.

[0070] In this embodiment, when the main shaft 11 is in the main shaft open position and the energy storage mechanism is in the energy storage state, the closing operation is performed to release the energy storage mechanism. When the energy storage mechanism releases the energy, it drives the cam mechanism 14, which drives the conversion lever 3 to rotate from the lever locked position to the lever unlocked position. The conversion lever 3 drives the locking tongue 21 to rotate. At the same time, the locking part 23 of the locking tongue 21 avoids the locking claw 26 of the anti-rebound lock 25. The energy storage mechanism release drives the linkage mechanism 16 to drive the main shaft 11 to rotate from the main shaft open position to the main shaft closed position. In this embodiment, the cam mechanism 14 has a dual function. During the closing process, the energy storage mechanism releases energy and first drives the conversion lever 3 to rotate to the lever unlock position via the cam mechanism 14, causing the locking tongue 21 to separate from the anti-rebound latch 25 and releasing the limiting effect on the main shaft 11. Then, the linkage mechanism 16 drives the main shaft 11 to rotate to the main shaft closing position. The cam mechanism 14 ensures that the locking tongue 21 will not interfere with the rotation of the main shaft 11 to the main shaft closing position, allowing the main shaft 11 to rotate smoothly to the main shaft closing position. Of course, in other embodiments, when the energy storage mechanism releases energy, it can also drive the conversion lever 3 to move to the lever unlock position via the energy storage shaft 13 or the linkage mechanism 16, or the energy storage mechanism releases energy to drive the newly set transmission rod to rotate the conversion lever 3 from the lever locked position to the lever unlock position.

[0071] The locking component 2 in this embodiment has the following beneficial effects:

[0072] 1. When the main shaft 11 approaches the main shaft open position, the locking claw 26 will push the locking part 23 to move out of position. When the main shaft 11 reaches the main shaft open position, the locking tongue 21 and the locking claw 26 of the anti-rebound latch 25 immediately interlock, without the need for the main shaft 11 to trigger the traditional inertial latch action and then limit the position, thus achieving zero-delay anti-rebound.

[0073] 2. After the locking tongue 21 and the anti-rebound latch 25 are interlocked, the position of the locking tongue 21 remains constant and the interlocked state is maintained. It will not automatically reset after the moment of rebound, so that the locking mechanism provides more reliable suppression force when preventing rebound and significantly improves the stability of anti-rebound.

[0074] 3. By designing the difference between the movement trajectory of the locking claw 26 and the movement trajectory of the locking part 23, when the spindle 11 has a tendency to spring back, the two automatically interlock due to the difference in their movement trajectories, which can provide the spindle 11 with a more accurate and reliable anti-springback effect.

[0075] 4. The buffer spring 24 is not only used to drive the lock tongue 21 and the lock claw 26 to interlock, but also plays a buffering role. By absorbing part of the impact force of the anti-rebound lock 25, it reduces rigid collisions, reduces the risk of fatigue damage to key components, and helps to extend the service life of the entire operating mechanism.

[0076] 5. The spindle 11 only drives the locking pawl 26 and the locking tongue 21 to form a limit when it rebounds. If there is no rebound force, the locking pawl 26 and the locking tongue 21 remain misaligned and do not contact each other, so as not to affect the spindle 11.

[0077] like Figure 2 As shown, the locking mechanism also includes a return spring 5, which drives the conversion lever 3 to rotate from the lever unlock position to the lever lock position. A locking element 4 is provided on the bracket to prevent the conversion lever 3 from rotating. The return spring 5 is connected between the conversion lever 3 and the bracket. The return spring 5 applies a counterclockwise rotational return force to the conversion lever 3, causing the conversion lever 3 to abut against the locking element 4, and the conversion lever 3 to rotate to the lever lock position.

[0078] In particular, as a preferred option, such as Figure 2-3 As shown, the closing half-shaft 15 of the energy storage mechanism can limit the switching lever 3, locking it in the lever locked position. This prevents the switching lever 3 from rotating from the lever locked position to the lever unlocked position. Only when the closing half-shaft 15 rotates to release the energy storage spring, allowing the energy storage mechanism to release energy for the closing operation, will the closing half-shaft 15 release the lock on the switching lever 3, and the switching lever 3 can then be driven to rotate from the lever locked position to the lever unlocked position. In this embodiment, the closing half-shaft 15 of the energy storage mechanism not only releases the energy storage spring but also limits and allows the switching lever 3 to move. It can only rotate to the lever unlocked position during the closing operation, improving the reliability of the locking mechanism. Furthermore, when the closing half-shaft 15 limits the switching lever 3, locking it in the lever locked position, and when the locking part 23 limits the end of the locking pawl 26, the closing half-shaft 15 counteracts the springback force of the main shaft 11, reliably suppressing the springback of the main shaft 11.

[0079] Preferably, when the cam mechanism 14 compresses the energy storage spring, it pushes the conversion lever 3 to press against the closing half shaft 15 of the limit conversion lever 3; when the closing half shaft 15 releases the lock on the conversion lever 3, the conversion lever 3 is pushed by the cam mechanism 14 to quickly rotate to the lever unlock position.

[0080] In this embodiment, the switching lever 3 is a prior art locking lever, that is, the locking component 2 is set on the existing locking lever, the switching lever 3 and the locking lever are the same element, the locking component 2 is set on the locking lever, during the energy storage process, the cam mechanism 14 rotates under the drive of the energy storage shaft 13, pushing the energy storage rod 162 of the linkage mechanism 16, the linkage mechanism 16 is driven by the energy storage rod 162, and the movable spring seat 163 compresses the energy storage spring. At the same time, the roller 141 of the linkage mechanism 16 pushes the locking lever close to the opening half shaft 15. When the energy storage spring has completed energy storage, the roller 141 of the cam mechanism 14 pushes the locking lever to press against the closing half shaft 15. The closing half shaft 15 limits the cam mechanism 14 through the locking lever, and prevents the energy storage spring from releasing energy through the cam mechanism 14, thereby locking the energy storage mechanism in the energy storage state;

[0081] When the circuit breaker is in the open state and the energy storage mechanism is in the energy storage state, the closing half-shaft 15 can be driven by the closing button or the closing electromagnetic mechanism. This releases the limiting effect of the closing half-shaft 15 on the locking lever, and the cam mechanism 14 loses its function of preventing the energy storage spring from releasing energy. The energy storage spring then begins to release energy, and the released energy storage mechanism simultaneously drives the cam mechanism 14 and the linkage mechanism 16 to rotate. Under the drive of the energy storage mechanism, the cam mechanism 14 pushes the locking lever to the lever unlocked position. At the same time, under the drive of the energy storage mechanism, the linkage mechanism 16 drives the main shaft 11 to rotate from the main shaft open position to the main shaft closed position, driving the moving contact to contact the stationary contact, thus achieving closing. By using the existing locking lever as the conversion lever 3, the number of parts can be reduced, and it is unnecessary to simultaneously set up two parts: the locking lever and the conversion lever 3.

[0082] Of course, in other embodiments, locking levers and switching levers 3 can also be set separately, which cooperate with closing half shaft 15 and cam mechanism 14 respectively. When storing energy, cam mechanism 14 pushes locking levers and switching levers 3 to press against closing half shaft 15. When closing, closing half shaft 15 gives way to locking levers and switching levers 3 respectively. When locking levers and switching levers 3 release their limit on cam mechanism 14, energy storage spring begins to release energy and executes closing action. All of these are within the protection scope of this utility model.

[0083] like Figure 12As shown, the closing half-shaft 15 in this embodiment includes a release groove 152 and a blocking part 151 arranged radially on opposite sides of the axis. When the closing half-shaft 15 rotates, it drives the release groove 152 and the blocking part 151 to rotate alternately to the side close to the switching lever 3. When the blocking part 151 is opposite to the switching lever 3, the blocking part 151 can limit the switching lever 3 to the lever locked position and prevent the switching lever 3 from rotating to the lever unlocked position. When the closing half-shaft 15 rotates to release energy from the energy storage mechanism, when the release groove 152 is opposite to the switching lever 3, it avoids the switching lever 3, and the switching lever 3 can rotate through the release groove 152 and rotate from the lever locked position to the lever unlocked position.

[0084] like Figure 14 As shown, the conversion lever 3 includes a pivot portion 30 and a first transmission portion 31 and a second transmission portion 32 located on both sides of the pivot portion 30. The first transmission portion 31 cooperates with the closing half-shaft 15, and the cam mechanism 14 drives the conversion lever 3 to rotate through the second transmission portion 32. Specifically, the pivot portion 30 is rotatably connected to the bracket and is disposed between the closing half-shaft 15 and the cam mechanism 14; the first transmission portion 31 is inserted between the closing half-shaft 15 and the locking member 4; the second transmission portion 32 is inserted between the cam mechanism 14 and the return spring 5. The return spring 5 is connected between the second transmission portion 32 and the bracket. The cam mechanism 14 and the return spring 5 exert opposite forces on the conversion lever 3. The cam mechanism 14 pushes the second transmission portion 32 to rotate against the action of the return spring 5, driving the first transmission portion 31 to press against the blocking portion 151 of the closing half-shaft 15, or driving the first transmission portion 31 to rotate through the release groove 152 of the closing half-shaft 15 to the lever unlock position.

[0085] Preferred, such as Figure 13 As shown, the cam mechanism 14 is provided with a rotatable roller 141, which is located on one side of the energy storage shaft 13 in the radial direction. When the cam mechanism 14 rotates with the energy storage shaft 13, it drives the roller 141 to push the conversion lever 3.

[0086] The operation process of the operating mechanism in this embodiment is as follows:

[0087] like Figure 3-4As shown, the circuit breaker is in the closed state, the main shaft 11 is in the main shaft closed position, and the operating mechanism has completed energy storage and is in the energy storage state. The switching lever 3 is in the lever locked position, and the locking component 2 on the switching lever 3 is in place. At this time, the return spring 5 applies a reset force to the switching lever 3 to rotate towards the lever locked position, i.e., a counterclockwise rotational force as shown in the figure. The blocking part 151 of the closing half-shaft 15 corresponds to the first transmission part 31 of the switching lever 3, preventing the switching lever 3 from rotating towards the lever unlocking position and limiting the switching lever 3 to the lever locked position. Since the operating mechanism has completed energy storage, the cam mechanism 14 has a tendency to rotate counterclockwise. The switching lever 3 pushes the second transmission part 32 of the switching lever 3 through the roller 141, applying a force to the switching lever 3 to rotate towards the lever unlocking position, i.e., a clockwise rotational force as shown in the figure. However, at this time, due to the blocking of the closing half-shaft 15, the closing half-shaft 15 cannot rotate to the lever unlocking position. That is, the roller 141 and the closing half-shaft 15 lock the switching lever 3 in both directions, locking the switching lever 3 in the lever locked position.

[0088] like Figure 5 As shown, the operating mechanism begins the opening process. The main shaft 11 rotates from the main shaft closed position to the main shaft open position, causing the anti-rebound latch 25 to rotate clockwise. At this time, the locking part 23 is located on the first trajectory A of the locking pawl 26 as the main shaft 11 rotates. The locking pawl 26 will contact the locking part 23 and push the locking part 23, causing the latch 21 to compress the buffer spring 24 and rotate clockwise until the main shaft 11 reaches the main shaft open position. Then, the end of the locking pawl 26 is misaligned with the latch 21. When the latch 21 loses the push of the locking pawl 26, the buffer spring 24 drives the latch 21 to rotate counterclockwise to reset. The latch 21 first passes through Figure 6 When in position, the pawl 26 is located outside the second trajectory B of the locking part 23, and will not obstruct the rotation of the bolt 21. The bolt 21 continues to rotate under the drive of the buffer spring 24. Figure 7 At the indicated position, the locking tongue 21 is spaced apart on the side of the locking claw 26. When the cantilever 111 on the main shaft 11 impacts the limiting shaft 112 and generates a rebound force, it applies a counterclockwise rotation tendency to the anti-rebound latch 25. When the anti-rebound latch 25 rotates counterclockwise, the locking part 23 is located on the first trajectory A of the end of the locking claw 26 as it rotates with the main shaft 11, causing the end of the locking claw 26 to contact the locking tongue 21, preventing the main shaft 11 from rebounding. Finally, the main shaft 11 stabilizes at the main shaft open position, completing the opening action. In other embodiments, the locking tongue 21 continues to rotate under the drive of the buffer spring 24 until... Figure 7 In the position shown, the locking tongue 21 can also contact the side of the locking claw 26, or it can abut against the side of the locking claw 26 under the drive of the buffer spring 24, so that the locking tongue 21 remains tilted and interlocks with the locking claw 26. All of these are within the protection scope of this utility model.

[0089] like Figure 9-10As shown, since the operating mechanism has already stored energy after the last closing operation, there is no need to store energy in the energy storage mechanism again, and the closing operation can be started directly. When the operating mechanism starts closing, the closing half shaft 15 is driven to rotate to release the energy storage spring, that is, when the energy storage mechanism releases energy, the rotation of the closing half shaft 15 simultaneously causes the release groove 152 to align with the first transmission part 31 of the switching lever 3. The closing half shaft 15 releases the limit on the switching lever 3, and the switching lever 3, pushed by the roller 141 of the cam mechanism 14, overcomes the force of the return spring 5 and rotates clockwise. The first transmission part 31 passes through the release groove 152, and the switching lever 3 quickly rotates to the lever unlock position. At the same time, the switching lever 3 drives the locking component 2 to rotate, causing the locking part 23 of the locking tongue 21 to move away from the locking claw 26 of the anti-rebound latch 25. The locking component 2 releases the limit on the anti-rebound latch 25, so the main shaft 11 can close normally. The released energy storage spring can drive the linkage mechanism 16 to drive the main shaft 11 to rotate to Figure 11 The main shaft is in the closed position shown. At this time, the roller 141 of the cam mechanism 14 also rotates counterclockwise to the lower part of the second transmission part 32 of the conversion lever 3, and no longer acts on the conversion lever 3.

[0090] Then, the reset spring 5 drives the change lever 3 to rotate counterclockwise to reset. The first transmission part 31 passes through the release groove 152 of the closing half shaft 15 to reset. The change lever 3 abuts against the locking part 4, and the locking part 4 limits the change lever 3 to the lever locked position. Then, the closing half shaft 15 also resets after releasing the energy storage spring and drives the release groove 152 away from the first transmission part 31 of the change lever 3, so that the blocking part 151 is opposite to the first transmission part 31. The closing half shaft 15 limits the lever locked position, so that the change lever 3 cannot rotate from the lever locked position to the lever unlocked position.

[0091] At this time, the circuit breaker is in the closed state, the operating mechanism is in the un-energized state, and the roller 141 of the cam mechanism 14 has not pushed the second transmission part 32 of the switching lever 3. If the opening operation is performed at this time, the switching lever 3 is in the lever locking position, and the locking component 2 is in place. The locking component 2 can also cooperate with the anti-rebound lock 25 on the main shaft 11 to prevent the main shaft 11 from impacting and rebounding after rotating to the main shaft opening position. The specific process is the same as described above and will not be repeated.

[0092] Before the circuit breaker is closed again, the operating mechanism needs to be energized to put it in an energized state. Energy storage can be performed automatically or manually after the circuit breaker is closed, or it can be performed after the circuit breaker is opened. During energy storage, the cam mechanism 14 rotates counterclockwise under the drive of the energy storage shaft 13. For example, the cam mechanism 14 rotates from... Figure 11 Rotate counterclockwise to the middle position Figure 5In the middle position, the cam mechanism 14 compresses the energy storage spring through the corresponding transmission rod. When the energy storage of the operating mechanism is almost completed, the cam mechanism 14 drives the roller 141 to rotate counterclockwise to the position of the second transmission part 32 that pushes the change lever 3, applying a rotational force to the change lever 3 in the direction of the lever unlocking position, so that the change lever 3 is pressed against the closing half shaft 15, preparing for the next circuit breaker closing operation. At this time, the locking mechanism is already in place. When the main shaft 11 reaches the main shaft opening position, the anti-rebound latch 25 and the pre-positioned locking mechanism immediately limit the movement, achieving zero-delay anti-rebound, without the need for the traditional inertial anti-rebound latch 25 to be driven to the predetermined position by inertia.

[0093] It should be noted that the closing half-shaft 15, the cam mechanism 14, and the energy storage mechanism are all existing structures of the operating mechanism, and their operational coordination is prior art in this application. The improvement of the closing half-shaft 15 and the cam mechanism 14 in this application lies in adding a structure that cooperates with the conversion lever 3.

[0094] Preferably, the operating mechanism automatically starts energy storage after the closing is completed, that is, the main shaft 11 of the operating mechanism is in the main shaft closing position and the energy storage structure is in the energy storage state. At this time, the closing half shaft 15 limits the first transmission part 31 of the conversion lever 3. The cam mechanism 14 pushes the second transmission part 32 of the conversion lever 3 while compressing the energy storage spring, so that the conversion lever 3 is pressed against the closing half shaft 15. The cam mechanism 14 and the closing half shaft 15 limit the conversion lever 3 from two directions, locking the conversion lever 3 in the lever locking position, which can reliably prevent the main shaft 11 from rebounding when it is opened. The cam mechanism 14 applies a pushing force to the conversion lever 3 in advance to rotate it to the lever unlocking position.

[0095] It should be noted that when the switching lever 3 contacts the locking member 4 under the drive of the return spring 5, there may be no gap or a small gap (e.g., about 0.5mm) between the first transmission part 31 of the switching lever 3 and the closing half shaft 15. The switching lever 3 is in the lever-locked position when it contacts the locking member 4, and when the cam mechanism 14 drives the switching lever 3 to abut against the blocking part 151 of the closing half shaft 15. Both positions can cooperate with the anti-rebound latch 25 on the main shaft 11 to prevent the main shaft 11 from springing back. In the case where there is a small gap between the first transmission part 31 and the closing half shaft 15, when the main shaft 11 springs back, the switching lever 3, driven by the anti-rebound latch 25, moves through the gap and contacts the closing half shaft 15. At this time, it is only necessary to ensure that the anti-rebound latch 25 and the locking tongue 26 do not separate and remain interlocked. The cooperation of the closing half shaft 15, the locking tongue 25, and the anti-rebound latch 25 can prevent the main shaft 11 from springing back. In addition, as another embodiment, when the switching lever 3 contacts the locking member 4 under the drive of the return spring 5, there can be a large gap between the first transmission part 31 of the switching lever 3 and the closing half shaft 15. The cam mechanism 14 drives the switching lever 3 to abut against the blocking part 151 of the closing half shaft 15 to form a lever locking position. This embodiment is suitable for an operating mechanism that automatically starts energy storage after closing.

[0096] like Figure 13 As shown, the cam mechanism 14 of this embodiment includes a cam plate 142 and a support plate 143 respectively fixed on the energy storage shaft 13. The cam plate 142 and the support plate 143 are spaced apart and connected by a plurality of pins 144. The cam plate 142 is provided with a cam surface, which is used to push the energy storage rod 162 and compress the energy storage spring through the energy storage rod 162. The plurality of pins 144 are arranged in a curve. The distance from the pin 144 located at the lowest point of the curve to the axis of the energy storage shaft 13 is less than the distance from the pin 144 located at the highest point of the curve to the axis of the energy storage shaft 13. The distance from the pin 144 located at the highest point of the curve to the axis of the energy storage shaft 13 is the farthest. A rotatable roller 141 is provided on the pin 144 farthest from the axis of the energy storage shaft 13. The second transmission part 32 of the conversion lever 3 is inserted between the cam plate 142 and the support plate 143 and rolls with the roller 141 on the pin 144 farthest from the axis of the energy storage shaft 13.

[0097] In this embodiment, the cam mechanism 14 utilizes the pin 144 connecting the fixed cam plate 142 and the support plate 143 to cooperate with the conversion lever 3, without changing the structure of the existing cam mechanism 14, avoiding redundant parts design, and achieving anti-rebound at low cost.

[0098] Alternatively, a pin 144 with rollers 141 can be provided on the outside of the cam plate 142 or support plate 143, or at other locations. The conversion lever 3 does not need to be inserted between the support plate 143 and the cam plate 142, allowing for flexible position selection. Alternatively, rollers 141 can be omitted, and the pin 144 can directly contact the conversion lever 3. However, when the conversion lever 3 directly contacts the pin 144, it is a sliding fit, while the conversion lever 3 and rollers 141 are in a rolling fit. Furthermore, an independent cam or connecting rod can be provided on the energy storage shaft 13 for individually driving the conversion lever 3.

[0099] It should be noted that the cam mechanism 14 can directly or indirectly drive the locking mechanism. Alternatively, in other embodiments, the closing half-shaft 15 may not be used to limit the switching lever 3.

[0100] like Figure 14 As shown, the first transmission part 31 of the conversion lever 3 in this embodiment is L-shaped. The first end of the first transmission part 31 is connected to the pivot part 30, and the end is bent toward the closing half shaft 15 to form a first clearance groove 311. The first clearance groove 311 is used to avoid the cantilever 111 on the main shaft 11. The end face of the end of the first transmission part 31 is provided with a first limiting surface 312 that cooperates with the closing half shaft 15. When the closing half shaft 15 contacts the first limiting surface 312, it limits the first transmission part 31.

[0101] The first end of the second transmission part 32 is connected to the first transmission part 31. An L-shaped locking groove 321 is provided on the side away from the pivot part 30 at the connection between the second transmission part 32 and the first transmission part 31. When the return spring 5 drives the conversion lever 3 to rotate to the lever locking position, the conversion lever 3 is nested in the upper limit engagement of the locking member 4 through the locking groove 321.

[0102] The end of the second transmission part 32 bends toward the cam mechanism 14 and forms a second clearance groove 322. The second clearance groove 322 is used to avoid the energy storage shaft 13 and the roller 141 of the cam mechanism 14. The end of the second transmission part 32 is provided with a second limiting surface 323 near the side of the second clearance groove 322.

[0103] During the closing process, the roller 141 is located in the second clearance groove 322. The roller 141 can push the second limiting surface 323, causing the conversion lever 3 to rotate counterclockwise to the lever unlocking position. Then the roller 141 moves to the outside of the second clearance groove 322 to prepare for the next energy storage process.

[0104] During the energy storage process of the compressed energy storage spring, the roller 141 continues to rotate clockwise and slides back into the second clearance groove 322 from above.

[0105] like Figure 15-16As shown, in this embodiment, the locking component 2 is fixed to the conversion lever 3 by the mounting shaft 27. The locking component 2 and the conversion lever 3 are respectively arranged on opposite sides of one of the side plates 12. The corresponding side plate 12 is provided with a slide groove 121 for the mounting shaft 27 to pass through. When the conversion lever 3 rotates between the lever locking position and the lever unlocking position, the locking component 2 is driven to rotate by the mounting shaft 27, and the mounting shaft 27 slides along the slide groove 121.

[0106] The locking assembly 2 in this embodiment includes a locking seat fixedly mounted on the conversion lever 3, and the locking tongue 21 is rotatably connected to the locking seat. Specifically, the locking seat includes two side mounting plates 281 disposed opposite to each other, and an upper mounting plate 282 vertically disposed between the two side mounting plates 281. The two side mounting plates 281 are respectively mounted on a mounting shaft 27 and connected to the conversion lever 3 through the mounting shaft 27. The upper mounting plate 282 is connected to the side mounting plates 281 on both sides.

[0107] The upper mounting plate 282 is positioned opposite to the locking tongue 21. A buffer spring 24 is positioned between the upper mounting plate 282 and the locking tongue 21. Limiting cylinders are respectively provided in the middle portions of the upper mounting plate 282 and the locking tongue 21. The two ends of the buffer spring 24 are respectively inserted into the limiting cylinders of the upper mounting plate 282 and the locking tongue 21 for limiting. At least one of the limiting cylinders of the upper mounting plate 282 and the locking tongue 21 is inclined towards the end face of the other limiting cylinder to avoid obstructing the other limiting cylinder. The side mounting plate 281 has guide grooves 283 corresponding to the locking part 23. The two ends of the locking part 23 are respectively inserted into the guide grooves 283 on both sides for sliding engagement. The guide grooves 283 can constrain the angle of the locking tongue 21 during swing and provide guidance for the movement of the locking tongue 21. The locking assembly 2 forms a modular structure, fixedly connected to the conversion lever 3 via a mounting shaft 27, and passing through the side plate 12 of the operating mechanism via the mounting shaft 27, respectively positioned on both sides of the side plate 12. Figure 4 The assembly is simple and reliable. Obviously, the locking component 2 can also adopt other structures, such as a structure in which a torsion spring cooperates with the locking tongue 21.

[0108] like Figure 17The first embodiment of the anti-rebound latch 25 is shown. The anti-rebound latch 25 includes a fixed part 250 sleeved on the main shaft 11, and a first extension part 251 and a second extension part 252 connected together. The first extension part 251 is connected between the fixed part 250 and the second extension part 252. A third clearance groove 253 is formed at the connection between the first extension part 251 and the second extension part 252 to avoid the latch tongue 21. A latch pawl 26 is provided at one end of the second extension part 252 away from the first extension part 251. A fourth clearance groove 254 is provided in the middle of the second extension part 252. When the latch pawl 26 pushes the latch tongue 21 to swing, the fourth clearance groove 254 is used to avoid the head end of the latch tongue 21, ensuring that the latch tongue 21 only contacts the latch pawl 26. Preferably, the distance from the end of the locking claw 26 to the axis of the main shaft 11 is greater than the distance from the end of the locking part 23 to the axis of the rotating part 22. That is, the rotation radius of the end of the locking claw 26 is greater than the rotation radius of the locking part 23. The distance from the end of the locking part 23 to the axis of the rotating part 22 is smaller, and the radius of the locking tongue 21 is also smaller, so that the locking tongue 21 can interlock with the anti-rebound latch 25 more quickly when it rotates.

[0109] like Figure 18 The second embodiment of the anti-rebound latch 25 is shown. The fourth clearance groove 254 may not be provided in the middle of the second extension. However, the angle of the latch 21 needs to be adjusted to avoid interference between the latch 21 and other parts other than the pawl 26. For example, the latch 21 can be tilted so that its rotating part 22 moves upward. When the pawl 26 pushes the locking part 23 of the latch 21, since the rotating part 22 of the latch 21 is located above, it will not interfere with the anti-rebound latch 25. All of these are within the protection scope of this utility model.

[0110] It should be noted that in the description of this utility model, the terms "upper," "lower," "left," "right," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used during use. They are only for ease of description and do not indicate that the device or component referred to must have a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating relative importance.

[0111] The above description, in conjunction with specific preferred embodiments, provides a further detailed explanation of the present invention. It should not be construed that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, various simple deductions or substitutions can be made without departing from the concept of the present invention, and all such modifications and substitutions should be considered within the protection scope of the present invention.

Claims

1. An anti-rebound operating mechanism, comprising a bracket, a main shaft (11), a linkage mechanism (16), an energy storage shaft (13), a cam mechanism (14), and an energy storage mechanism. The bracket includes two side plates (12). The main shaft (11) and the energy storage shaft (13) are rotatably mounted on the two side plates (12). The linkage mechanism (16), the cam mechanism (14), and the energy storage mechanism are mounted between the two side plates (12). The main shaft (11) is used to connect with a moving contact and can rotate between the main shaft closed position and the main shaft open position. The linkage mechanism (16) is connected to the main shaft (11). The cam mechanism (14) is fixed on the energy storage shaft (13) and is used to drive the energy storage mechanism to store energy. The energy storage mechanism is used to drive the main shaft (11) to rotate to the main shaft closed position. Its features are, It also includes a locking mechanism and an anti-rebound latch (25) connected to the main shaft (11). The locking mechanism includes a rotating conversion lever (3) and a locking component (2). The locking component (2) is disposed on the conversion lever (3) and rotates with the conversion lever (3) between the lever locking position and the lever unlocking position. When the conversion lever (3) is in the lever locking position, the locking component (2) locks the anti-rebound latch (25) to prevent the main shaft (11) from rotating from the main shaft open position to the main shaft closed position. When the conversion lever (3) is in the lever unlocking position, the locking component (2) avoids the anti-rebound latch (25), and the main shaft (11) can rotate from the main shaft open position to the main shaft closed position. When the main shaft (11) is in the main shaft open position and the energy storage mechanism is in the energy storage state, the energy storage mechanism releases energy and directly or indirectly drives the switching lever (3) to rotate from the lever locked position to the lever unlocked position. The energy storage mechanism releases energy and drives the linkage mechanism (16) to drive the main shaft (11) to rotate from the main shaft open position to the main shaft closed position.

2. The anti-rebound operating mechanism according to claim 1, characterized in that: The locking component (2) includes: The locking tongue (21) can rotate relative to the conversion lever (3), including a rotating part (22) and a locking part (23) that swings around the axis of the rotating part (22). The locking part (23) is used to limit the engagement with the locking claw (26) on the anti-rebound lock (25). A buffer spring (24) is connected to the locking tongue (21) and is used to drive the locking part (23) to reset; The anti-rebound latch (25) is mounted on the main shaft (11), and the anti-rebound latch (25) is provided with a locking claw (26) for limiting the locking tongue (21).

3. The anti-rebound operating mechanism according to claim 2, characterized in that: When the switching lever (3) is in the lever locked position, the locking tongue (21) is located on the first trajectory (A) of the locking pawl (26) as it rotates with the main shaft (11); during the process of the main shaft (11) rotating from the main shaft closed position to the main shaft open position, the main shaft (11) drives the end of the locking pawl (26) to push the locking part (23), causing the locking tongue (21) to compress the buffer spring (24) and rotate to make room. After the main shaft (11) rotates to the main shaft open position, the end of the locking claw (26) is misaligned with the locking part (23) and the buffer spring (24) is released, so that the locking tongue (21) is reset under the drive of the buffer spring (24), which drives the locking part (23) to rotate to the side of the locking claw (26). When the main shaft (11) rotates to the main shaft open position and a collision occurs, the end of the locking claw (26) contacts the locking tongue (21), and the locking part (23) limits the end of the locking claw (26) to prevent the main shaft (11) from rebounding. During the rotation of the main shaft (11) from the main shaft open position to the main shaft closed position, the energy storage mechanism drives the conversion lever (3) to rotate to the lever unlock position, causing the locking tongue (21) to move away from the end of the locking claw (26) along the first trajectory (A) of the main shaft (11) as it rotates. The energy storage mechanism then drives the main shaft (11) to rotate towards the main shaft closed position.

4. The anti-rebound operating mechanism according to claim 1, characterized in that: The locking mechanism also includes a return spring (5) for driving the switching lever (3) to rotate from the lever unlock position to the lever lock position.

5. The anti-rebound operating mechanism according to claim 1, characterized in that: When the energy storage mechanism releases energy, it drives the cam mechanism (14), the energy storage shaft (13), or the linkage mechanism (16), which in turn drives the conversion lever (3) to rotate from the lever locked position to the lever unlocked position.

6. The anti-rebound operating mechanism according to claim 1, characterized in that: The energy storage mechanism includes a closing half-shaft (15), an energy storage spring, and a locking lever. The energy storage shaft (13) drives the energy storage spring to store energy through a cam mechanism (14), and the closing half-shaft (15) locks the energy storage mechanism in the energy storage state through a limiting locking lever. The closing half-shaft (15) can limit the switching lever (3) and lock the switching lever (3) in the lever locking position, so that the switching lever (3) cannot rotate from the lever locking position to the lever unlocking position. When the closing half-shaft (15) rotates to release the limiting of the locking lever and release the energy storage mechanism, the closing half-shaft (15) simultaneously releases the locking of the switching lever (3).

7. The anti-rebound operating mechanism according to claim 6, characterized in that: When the cam mechanism (14) compresses the energy storage spring, it pushes the switching lever (3) and the closing half shaft (15) of the limit switching lever (3) to press against each other through the cam mechanism; when the closing half shaft (15) releases the lock on the switching lever (3), the switching lever (3) is pushed by the cam mechanism (14) to quickly rotate to the lever unlock position.

8. The anti-rebound operating mechanism according to claim 7, characterized in that: The switching lever (3) includes a pivot (30) and a first transmission part (31) and a second transmission part (32) located on both sides of the pivot (30). The first transmission part (31) cooperates with the closing half shaft (15), and the cam mechanism (14) drives the switching lever (3) to rotate through the second transmission part (32).

9. The anti-rebound operating mechanism according to claim 8, characterized in that: It also includes a locking element (4) and a return spring (5). The locking element (4) is mounted on the bracket to prevent the conversion lever (3) from rotating. The return spring (5) is connected between the conversion lever (3) and the bracket and applies a force to the conversion lever (3) to rotate the locking element (4), so that the conversion lever (3) and the locking element (4) come into contact.

10. The anti-rebound operating mechanism according to claim 9, characterized in that: The pivot (30) is rotatably connected to the bracket and is located between the closing half shaft (15) and the cam mechanism (14); the first transmission part (31) is inserted between the closing half shaft (15) and the locking member (4); the second transmission part (32) is inserted between the cam mechanism (14) and the return spring (5), the return spring (5) is connected between the second transmission part (32) and the bracket, the cam mechanism (14) pushes the second transmission part (32) to rotate against the action of the return spring (5), drives the first transmission part (31) to press against the blocking part (151) of the closing half shaft (15), or drives the first transmission part (31) to pass through the release groove (152) of the closing half shaft (15) and rotate to the lever unlocking position.

11. The anti-rebound operating mechanism according to claim 2, characterized in that: The locking assembly (2) further includes a locking seat fixedly mounted on the conversion lever (3). The locking tongue (21) is rotatably connected to the locking seat. The locking seat includes two side mounting plates (281) arranged opposite to each other, and an upper mounting plate (282) vertically arranged between the two side mounting plates (281). The two side mounting plates (281) are respectively mounted on the mounting shaft (27) and connected to the conversion lever (3) through the mounting shaft (27). The upper mounting plate (282) is respectively connected to the side mounting plates (281) on both sides. The upper mounting plate (282) is arranged opposite to the locking tongue (21). A buffer spring (24) is connected between the upper mounting plate (282) and the locking tongue (21). The side mounting plate (281) is provided with a guide groove (283). The end of the locking part (23) is inserted into the guide groove (283) for sliding engagement.

12. The anti-rebound operating mechanism according to claim 11, characterized in that: The conversion lever (3) and the locking assembly (2) are disposed on opposite sides of one of the side plates (12). The corresponding side plate (12) is provided with a groove (121) for the mounting shaft (27) to pass through. When the conversion lever (3) rotates between the lever locking position and the lever unlocking position, the mounting shaft (27) slides along the groove (121).

13. The anti-rebound operating mechanism according to claim 2, characterized in that: The distance from the end of the locking claw (26) to the axis of the main shaft (11) is greater than the distance from the end of the locking part (23) to the axis of the rotating part (22).

14. The anti-rebound operating mechanism according to claim 6, characterized in that: The locking lever and the switching lever (3) are the same element.

15. The anti-rebound operating mechanism according to claim 6, characterized in that: The closing half shaft (15) includes a release groove (152) and a blocking part (151) arranged radially. When the blocking part (151) is opposite to the conversion lever (3), the blocking part (151) limits the conversion lever (3) to the lever locking position and prevents the conversion lever (3) from rotating to the lever unlocking position. When the release groove (152) is opposite to the conversion lever (3), the conversion lever (3) can rotate through the release groove (152) and rotate from the lever locking position to the lever unlocking position.

16. The anti-rebound operating mechanism according to claim 7, characterized in that: The cam mechanism (14) is provided with a rotatable roller (141). When the cam mechanism (14) rotates with the energy storage shaft (13), it drives the roller (141) to push the conversion lever (3).

17. The anti-rebound operating mechanism according to claim 16, characterized in that: The cam mechanism (14) includes a cam plate (142) and a support plate (143) arranged opposite to each other. The two are connected by a plurality of pins (144) arranged in a curve. The pin (144) farthest from the energy storage shaft (13) is provided with the roller (141). The conversion lever (3) is inserted between the cam plate (142) and the support plate (143) and rolls with the roller (141).

18. The anti-rebound operating mechanism according to claim 1, characterized in that: The anti-rebound latch (25) includes a fixing part (250) sleeved on the main shaft (11), and a first extension part (251) and a second extension part (252) connected together. The first extension part (251) is connected between the fixing part (250) and the second extension part (252). A third clearance groove (253) for avoiding the locking tongue (21) is formed at the connection between the first extension part (251) and the second extension part (252). A locking claw (26) is provided at one end of the second extension part (252) away from the first extension part (251). A fourth clearance groove (254) for avoiding the locking tongue (21) is provided in the middle of the second extension part (252).

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