Anti-rebound operating mechanism

Abstract

The anti-rebound operating mechanism comprises a main shaft, an energy storage mechanism, a closing half shaft, a locking part, a locking catch, a locking spring and an unlocking rod. When the switch is opened, the locking part pushes the locking catch and compresses the locking spring during the rotation of the main shaft from the main shaft closing position to the main shaft opening position. When the main shaft reaches the main shaft opening position, the locking catch is immediately limited with the locking part under the driving of the locking spring, which greatly improves the response speed and reliability of the anti-rebound. When the switch is closed, the closing half shaft rotates to release the energy storage mechanism, and the unlocking rod is driven by the trigger part. The unlocking rod pushes the locking catch to release the locking of the locking part through the driving part, so that the energy storage mechanism drives the main shaft to rotate from the main shaft opening position to the main shaft closing position, avoiding the delay or out-of-sync risk caused by the independent unlocking mechanism.

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] Circuit breakers are important low-voltage protective electrical appliances widely used in power distribution systems and electrical equipment. Their main function is to promptly cut off current in the event of overload, short circuit, or other faults, protecting the lines and equipment. When a circuit breaker encounters a short-circuit current and attempts to interrupt it, the main shaft, upon reaching the open position, will rebound due to a rigid impact. This rebound will cause the moving contact to rebound as well, preventing the arc from being extinguished in time or causing it to reignite. This leads to the circuit breaker failing to interrupt the short-circuit current, severely affecting its breaking performance.

[0003] Currently, most anti-rebound structures in existing circuit breakers are based on the principle of inertia. For example, they use a baffle structure that swings due to inertia and is interlocked with the mechanism to achieve the anti-rebound function. However, this type of structure has obvious drawbacks: First, the inertial block moves lags behind during high-speed tripping, resulting in untimely locking and failure of the anti-rebound function; second, the structure has low reliability and is prone to malfunctions or jamming, affecting the closing operation; third, the overall structure is complex with many parts, making installation difficult in the confined space of the circuit breaker and inconvenient for later maintenance. Utility Model Content

[0004] The purpose of this utility model is to overcome at least one defect of the prior art and provide an anti-rebound operating mechanism.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] An anti-rebound operating mechanism includes a main shaft, an energy storage mechanism, and a closing half-shaft. The main shaft is rotatable between a main shaft closing position and a main shaft opening position. The closing half-shaft is used to release the energy storage mechanism, which drives the main shaft to rotate from the main shaft opening position to the main shaft closing position. The mechanism is characterized by further comprising:

[0007] A locking component, connected to the main shaft and equipped with a locking part;

[0008] The locking element is rotatably configured and has a locking part that cooperates with the locking element;

[0009] A locking spring, connected to the latching element, is used to drive the latching part to rotate towards the locking element;

[0010] The unlocking lever is equipped with a drive part that cooperates with the locking mechanism and a trigger part that cooperates with the closing half shaft;

[0011] During the opening of the circuit breaker, as the main shaft rotates from the closed position to the open position, the locking member rotates with the main shaft, and the locking part slides against the locking part of the latching member, compressing the locking spring. When the main shaft rotates to the open position, the locking part and the latching part are misaligned, and the locking spring drives the latching part to insert into the side of the locking part that rotates towards the closed position, blocking the locking part to prevent the main shaft from rebounding.

[0012] When the circuit is closed, the closing half-shaft rotates to release the energy storage mechanism. At the same time, the triggering part drives the unlocking rod, which pushes the locking fastener through the driving part to release the locking part. This causes the energy storage mechanism to drive the main shaft to rotate from the main shaft open position to the main shaft closed position.

[0013] Preferably, it includes two side plates, a main shaft, a linkage mechanism, an energy storage shaft, a cam mechanism, and an energy storage mechanism; 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 with the moving contact, 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, and when the energy storage mechanism releases energy, it drives the linkage mechanism to drive the main shaft to rotate from the main shaft open position to the main shaft closed position.

[0014] Preferably, the locking element, the latching element, and the unlocking rod are disposed on the side of one side plate away from the other side plate. The latching element and the unlocking rod are located between the main shaft and the closing half shaft. The two ends of the unlocking rod are respectively connected to the latching element and the closing half shaft. The closing half shaft is rotatably mounted on the two side plates. The side plate located between the closing half shaft and the unlocking rod is provided with a clearance hole corresponding to the closing half shaft. The closing half shaft is provided with a trigger shaft, which extends from the clearance hole to the outside of the side plate and cooperates with the unlocking rod.

[0015] Preferably, the locking element is located on one side of the locking element in the radial direction. The locking element is rotatably connected to the side plate through the mounting shaft. The locking spring is a torsion spring, which is sleeved on the mounting shaft and connected to the locking element and the side plate at both ends, respectively.

[0016] Preferably, the two ends of the closing half-shaft are rotatably connected to the two side plates via closing shafts;

[0017] The closing half-shaft is also equipped with:

[0018] The trigger shaft is set parallel to the closing shaft and located on one side of the radial direction of the corresponding closing shaft;

[0019] The blocking part is used to block the locking lever and lock the energy storage mechanism in the energy storage state;

[0020] A clearance groove is used to avoid the locking lever during the closing process to release the energy storage mechanism;

[0021] The blocking part and the clearance groove are located on two radially opposite sides of the closing half shaft. When the closing half shaft rotates to make the clearance groove correspond to the locking lever, the closing half shaft releases the locking lever and releases the energy storage mechanism.

[0022] The anti-rebound operating mechanism also includes a half-shaft spring connected between the side plate and the closing half-shaft, which provides a restoring force to the closing half-shaft and drives the closing half-shaft to rotate to the blocking part corresponding to the locking lever.

[0023] Preferably, one of the unlocking rod and the locking member is provided with a clearance structure. When the locking spring drives the locking part to be limited to the locking member, the clearance structure provides space for the locking member to move.

[0024] Preferably, the driving part of the unlocking rod is rotatably connected to the locking member, the triggering part of the unlocking rod is provided with a groove as a clearance structure, and the closing half shaft is provided with a trigger shaft for driving the unlocking rod to rotate. The trigger shaft is nested in the groove and can slide along the groove. While the locking spring drives the locking part and the locking member to be limited, the unlocking rod moves with the locking member and drives the groove to slide relative to the trigger shaft. When the closing half shaft rotates to reset, it drives the trigger shaft to slide along the groove.

[0025] Preferably, one of the locking element and the driving part is provided with a groove as a clearance structure, and the other is provided with a driving shaft nested in the groove, the driving shaft being able to slide within the groove.

[0026] Preferably, one end of the locking member is provided with a mounting hole and a driving hole, and the other end is provided with the locking part. The mounting hole is rotatably connected to the side plate through a mounting shaft, and the driving hole is rotatably connected to the unlocking rod through a driving shaft. The middle part of the locking member is bent away from the locking member to form a locking groove. The locking part is protruding at the bottom of the locking groove. When the locking part and the locking part are misaligned, the locking part is embedded in the locking groove.

[0027] Preferably, the locking component includes an annular fixing part, the middle of which is provided with a fixing hole for fixed connection on the main shaft, and the outer side of the fixing part protrudes radially to form a locking part that cooperates with the latching part; the outer wall of the locking part is arc-shaped, and the top of the latching part is provided with an arc-shaped sliding surface, which slides with the outer wall of the locking part when the switch is opened.

[0028] The anti-rebound mechanism in this embodiment, through optimized mechanical structure design, achieves reliable anti-rebound locking and reliable unlocking during the opening and closing of the circuit breaker, and has the following significant advantages:

[0029] 1. The locking spring drives the latch to always maintain sliding contact with the locking part. When the spindle reaches the spindle open position, the latch immediately engages with the locking part to limit the spindle and prevent it from rebounding. This avoids the lag problem caused by the traditional inertial latch needing to move for a period of time before forming the limit, and greatly improves the response speed and reliability of the anti-rebound mechanism.

[0030] 2. During the closing process, the locking and latching parts are automatically triggered by the closing half shaft to unlock, avoiding the risk of delay or asynchrony that may be caused by setting up an independent unlocking mechanism;

[0031] 3. Not only are there fewer parts and a more compact structure, but the assembly difficulty is also significantly reduced, which helps to lower manufacturing costs.

[0032] In addition, one of the unlocking rod and the locking fastener is provided with an avoidance structure. The avoidance structure provides dynamic avoidance function in the two key stages of opening the lock and closing the reset, so that the two actions do not interfere with each other, thereby improving the coordination of the mechanism's movement and the overall stability.

[0033] In addition, the avoidance function of the avoidance structure is achieved by nesting the slide and the trigger shaft. When the two move, they can guide each other and achieve better synchronization. Attached Figure Description

[0034] Figure 1 This is a schematic diagram of the circuit breaker.

[0035] Figure 2 This is a structural schematic diagram of the anti-rebound manipulator;

[0036] Figure 3 This is a schematic diagram of the operating mechanism in the closed state;

[0037] Figure 4 This is a schematic diagram of the operating mechanism in the open state;

[0038] Figure 5 This is a schematic diagram showing the unlocking of the latch and locking mechanism during the closing operation.

[0039] Figure 6 This is a structural schematic diagram of the locking component;

[0040] Figure 7 This is a structural diagram of the locking mechanism;

[0041] Figure 8 This is a schematic diagram of the unlocking lever;

[0042] Figure 9 This is a schematic diagram of the closing half-shaft;

[0043] Figure 10 This is a schematic diagram of the closing half-shaft locking the energy storage mechanism via the locking lever;

[0044] Figure 11 This is a schematic diagram of the closing half-shaft releasing the energy storage mechanism via the locking lever;

[0045] In the diagram: 1. Base; 2. Locking element; 3. Locking buckle; 4. Locking spring; 5. Unlocking rod; 11. Operating mechanism; 12. Main shaft; 13. Linkage mechanism; 14. Side plate; 16. Closing half shaft; 17. Locking lever; 21. Fixing part; 22. Fixing hole; 23. Locking part; 31. Locking buckle; 32. Mounting hole; 33. Drive hole; 34. Mounting shaft; 35. Drive shaft; 36. Locking buckle groove; 51. Drive part; 52. Trigger part; 53. Slide groove; 161. Closing shaft; 162. Trigger shaft; 163. Blocking part; 164. Clearance groove; 311. Sliding surface; 531. First end; 532. Second end. Detailed Implementation

[0046] 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.

[0047] like Figure 1 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 1, within which multiple fixedly connected contact supports are arranged side-by-side. Each contact support has multiple moving contacts. An operating mechanism 11 is located on the top side of the base 1. The operating mechanism 11 includes a bracket, a main shaft 12, a linkage mechanism 13, an energy storage shaft, a cam mechanism, and an energy storage mechanism. The bracket includes two side plates 14, and the main shaft 12 and the energy storage shaft are rotatably mounted on the two side plates 14. The linkage mechanism 13, the cam mechanism, and the energy storage mechanism... The energy storage mechanism is installed between the two side plates 14. The main shaft 12 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 13 is connected to the main shaft 12. The main shaft 12 is provided with a cantilever connected to the contact support. The moving contact is installed on the contact support. The cam mechanism is fixed on the energy storage shaft and is used to drive the energy storage mechanism to store energy. When the energy storage mechanism releases energy, it drives the linkage mechanism 13 to drive the main shaft 12 to rotate from the main shaft open position to the main shaft closed position.

[0048] The energy storage mechanism includes an energy storage spring, a closing half-shaft 16, and a locking lever 17. Before closing, the energy storage mechanism needs to store energy. During energy storage, the energy storage shaft is driven manually or by an electric motor to rotate the cam mechanism, which in turn drives the energy storage spring to store energy. When the energy storage spring has finished storing energy, the closing half-shaft 16 limits the locking lever 17 and locks the cam mechanism through the locking lever 17. The cam mechanism prevents the energy storage spring from releasing energy, thereby locking the energy storage mechanism in the energy storage state and keeping the operating mechanism 11 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 16 can be driven to rotate by the closing button or the closing electromagnetic mechanism, so that the closing half-shaft 16 releases the limiting effect on the locking lever 17 and allows the energy storage mechanism to release energy. The released energy storage mechanism drives the linkage mechanism 13 to rotate the main shaft 12 from the main shaft open position to the main shaft closed position, driving the moving contact to contact the stationary contact and realize closing. In this embodiment, the operating mechanism 11 automatically starts energy storage after the circuit closure is completed. The energy storage shaft 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 for energy storage.

[0049] The linkage mechanism 13 typically includes a transmission component and a tripping half-shaft for locking the transmission component. When the tripping half-shaft locks the transmission component, the linkage mechanism 13 can drive the drive shaft 12 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, it releases the tripping spring. The released energy of the tripping spring drives the main shaft 12 to rotate from the main shaft closed position to the main shaft open position through the linkage mechanism 13, 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, 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 to drive the tripping half-shaft to unlock the transmission component. The operating mechanism 11 is prior art in this field and will not be described in detail.

[0050] The main spindle 12 is capable of operating in the main spindle closed position. Figure 3 and main shaft open position Figure 4The main shaft 12 rotates, causing the moving contact to contact and separate from the stationary contact. Multiple cantilever arms are also fixedly mounted on the main shaft 12, some of which are connected to the contacts via connecting rods. The operating mechanism 11 also includes a limiting shaft. At least one cantilever arm cooperates with the limiting shaft to restrict the main shaft 12's open position. When the circuit breaker encounters a short-circuit current, the operating mechanism 11 is triggered to trip. That is, the protection mechanism inside the circuit breaker triggers the tripping half-shaft to rotate, unlocking the transmission component and releasing the opening spring. The operating mechanism 11 drives the main shaft 12 to rotate via the connecting rod mechanism 13, causing the moving contact to separate from the stationary contact. When the main shaft 12 reaches the open position, it will rebound due to collision with the limiting shaft, 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 has two cantilever arms for cooperating with the limiting shaft, which are arranged opposite each other on both sides of the operating mechanism 11.

[0051] like Figure 2-5 As shown, one improvement in this embodiment is the inclusion of an anti-rebound mechanism, which includes:

[0052] Locking member 2 is connected to the main shaft 12 and has a locking part 23. In this embodiment, the main shaft 12 includes a fixing part 21 sleeved on the main shaft 12 and a locking part 23 that protrudes radially from the fixing part 21.

[0053] The locking element 3 is rotatably mounted and has a locking part 31 that cooperates with the locking element 2. In this embodiment, the locking element 3 is rotatably mounted on the side plate 14, but it can also be rotatably mounted on other mounting structures.

[0054] The locking spring 4 is connected to the locking member 3 and drives the locking part 31 to rotate in the direction of the locking member 2. It is used to drive the locking part 31 to keep in contact with the locking part 23, or to drive the locking part 31 to lock with the locking part 23.

[0055] The unlocking lever 5 is provided with a drive part 51 that cooperates with the locking buckle 3 and a trigger part 52 that cooperates with the closing half shaft 16;

[0056] During the opening phase, as the main shaft 12 rotates from the main shaft closed position to the main shaft open position, the locking member 2 rotates with the main shaft 12, and the locking part 23 slides against the locking part 31 of the locking member 3, compressing the locking spring 4. That is, the locking part 23 of the locking member 2 is opposite to the locking part 31 of the locking member 3. The locking spring 4 drives the locking member 3 to make the locking part 23 abut against the locking member 3. The locking part 23 rotates and slides against the locking part 31. The locking part 23 blocks the locking part 31 and stores energy in the locking spring 4. The locking part 31 does not prevent the main shaft 12 from rotating to the main shaft open position. When the main shaft 12 rotates to the main shaft open position... Figure 4When the locking part 23 rotates with the main shaft 12 and is misaligned with the locking part 31, that is, the locking part 23 of the locking member 2 rotates past the locking part 3 of the locking member 3, and the locking spring 4 drives the locking part 31 to insert into the side of the locking part 23 that rotates toward the main shaft closing position, and the locking part 31 blocks the locking part 23 to prevent the main shaft 12 from rebounding;

[0057] When the circuit is closed, the closing half-shaft 16 rotates to release the energy storage mechanism, and at the same time, the trigger part 52 drives the unlocking rod 5. The unlocking rod 5, through the drive part 51, pushes the locking part 3 to overcome the force of the locking spring 4 and move away from the locking part 2. The locking part 31 releases the locking part 23 of the locking part 2. The energy storage mechanism, through the release of energy, drives the main shaft 12 from the main shaft open position. Figure 4 To the spindle closing position Figure 3 Rotate the main shaft to the main shaft closed position. Simultaneously, the locking part 23 rotates again with the main shaft 12 to a position opposite to the locking part 31. The locking part 23 blocks the locking part 31, keeping the locking spring 4 compressed. When the main shaft 12 rotates to the main shaft closed position, the locking member 2 and the locking member 3 remain in contact.

[0058] The anti-rebound mechanism in this embodiment, through optimized mechanical structure design, achieves reliable anti-rebound locking and reliable unlocking during the opening and closing of the circuit breaker, and has the following significant advantages:

[0059] 1. The locking spring drives the latch to always maintain sliding contact with the locking part. When the spindle reaches the spindle open position, the latch immediately engages with the locking part to limit the spindle and prevent it from rebounding. This avoids the lag problem caused by the traditional inertial latch needing to move for a period of time before forming the limit, and greatly improves the response speed and reliability of the anti-rebound mechanism.

[0060] 2. During the closing process, the locking and latching parts are automatically triggered by the closing half shaft to unlock, avoiding the risk of delay or asynchrony that may be caused by setting up an independent unlocking mechanism;

[0061] 3. Not only are there fewer parts and a more compact structure, but the assembly difficulty is also significantly reduced, which helps to lower manufacturing costs.

[0062] like Figure 2As shown, the locking member 2, the latching member 3, and the unlocking rod 5 are disposed on the side of one side plate 14 away from the other side plate 14. The latching member 3 and the unlocking rod 5 are located between the main shaft 12 and the closing half shaft 16. The two ends of the unlocking rod 5 are respectively connected to the latching member 3 and the closing half shaft 16. The closing half shaft 16 is rotatably mounted on the two side plates 14. The side plate 14 located between the closing half shaft 16 and the unlocking rod 5 is provided with a clearance hole corresponding to the closing half shaft 16. The closing half shaft 16 is provided with a trigger shaft 162, which extends from the clearance hole to the outside of the side plate 14 and cooperates with the unlocking rod 5. The latching member 3 is located on one radial side of the locking member 2. The latching member 3 is rotatably connected to the side plate 14 through the mounting shaft 34. The locking spring 4 is a torsion spring, sleeved on the mounting shaft 34, with both ends connected to the latching member 3 and the side plate 14 respectively, and is used to drive the latching member 3 to rotate closer to the locking member 2. Of course, the locking spring 4 can also be a tension spring or a leaf spring, etc.

[0063] The anti-rebound structure can be set on only one side of the operating mechanism, or it can be set on both sides of the operating mechanism. That is, a set of locking parts 2, locking buckles 3, locking springs 4 and unlocking rods 5 are set on each side of the side plate 14.

[0064] like Figure 9-11 As shown, the two ends of the closing half-shaft 16 are rotatably connected to the two side plates 14 of the operating mechanism 11 via the closing rotating shaft 161, and the closing half-shaft 16 is also provided with:

[0065] The trigger shaft 162 is arranged parallel to the closing shaft 161 and is located on the radial side of the corresponding closing shaft 161. It is used to push the trigger part 52 of the unlocking rod 5.

[0066] The blocking part 163 is used to block the locking lever 17 and lock the energy storage mechanism in the energy storage state.

[0067] The clearance groove 164 is used to avoid the locking lever 17 during the closing process to release the energy storage mechanism;

[0068] The blocking part 163 and the clearance groove 164 are located on two radially opposite sides of the closing half shaft 16. When the closing half shaft 16 rotates so that the clearance groove 164 corresponds to the locking lever 17, the closing half shaft 16 releases the locking lever 17 and releases the energy storage mechanism.

[0069] The anti-rebound operating mechanism also includes a half-shaft spring connected between the side plate 14 and the closing half-shaft 16. After the closing operation, it is used to provide a reset force for the closing half-shaft 16 and drive the closing half-shaft 16 to rotate back to the position where the blocking part 163 corresponds to the locking lever 17.

[0070] When the circuit is closed, the closing half-shaft 16 rotates against the half-shaft spring force under the external driving force of the closing button or the closing electromagnet, so that the clearance groove 164 corresponds to the locking lever 17. The closing half-shaft 16 releases the locking lever 17 and releases the energy storage mechanism. At the same time, the rotation of the closing half-shaft 16 drives the trigger shaft 162 to push the trigger part 52 of the unlocking rod 5. The unlocking rod 5 pushes the locking member 3 away from the locking member 2 through the driving part 51 and releases the limit on the locking member 2. Then, the closing half-shaft 16 rotates in the opposite direction and resets under the drive of the half-shaft spring, so that the blocking part 163 corresponds to the locking lever 17.

[0071] Furthermore, one of the unlocking rod 5 and the locking fastener 3 is provided with an avoidance structure. The avoidance structure provides dynamic avoidance function in the two key stages of opening the lock and closing the reset, so that the two actions do not interfere with each other, thereby improving the coordination of the mechanism's movement and the overall stability.

[0072] During the opening process, when the locking spring 4 drives the latch 31 to limit the locking member 2, the avoidance structure provides space for the latch 3 to move, ensuring that the latch 3 connected to the unlocking rod 5 can quickly and unobstructedly limit the locking member 2.

[0073] After the closing is completed, when the half-shaft spring drives the closing half-shaft 16 to reset, the avoidance structure provides space for the trigger shaft 162 to move, ensuring that the closing half-shaft 16 is smoothly reset under the drive of the half-shaft spring.

[0074] The avoidance structure effectively solves the motion interference problem during the opening and closing reset processes through ingenious spatial and motion design, and achieves multi-functional avoidance within a limited space without the need for additional parts.

[0075] like Figure 3-5 Figure 8 shows a first embodiment of the avoidance structure. The driving part 51 of the unlocking rod 5 is rotatably connected to the locking member 3 via a driving shaft. The triggering part 52 of the unlocking rod 5 is provided with a groove 53 serving as the avoidance structure. The triggering shaft 162 is nested in the groove 53 and can slide along the groove 53. The groove 53 is arc-shaped, and its shape matches the trajectory of the triggering shaft 162 as it rotates with the closing half-shaft 16. When the circuit is opened, the locking spring 4 drives the locking part 31 to be limited to the locking member 2, while the unlocking rod 5 moves with the locking member 3 and drives the groove 53 to slide relative to the triggering shaft 162. After the circuit is closed, when the closing half-shaft 16 resets, it drives the triggering shaft 162 to slide along the groove 53. In this embodiment, the avoidance function of the avoidance structure is achieved by nesting the groove 53 and the triggering shaft 162. When the two move, they can guide each other, resulting in better synchronization of their movements.

[0076] The specific operation process in this embodiment is as follows:

[0077] When the circuit breaker is tripped, if Figure 3As shown, the main shaft 12 starts moving from the main shaft closed position. The locking member 2 abuts against the locking part 31 of the locking member 3 and compresses the locking spring 4. The trigger shaft 162 is located at the first end 531 of the slide groove 53, as shown. Figure 4 As shown, when the main shaft 12 rotates to the main shaft open position, the locking part 2 and the locking part 31 of the locking buckle 3 are misaligned. The locking part 3 rotates clockwise under the drive of the locking spring 4 and is limited to the locking part 2. At the same time, it drives the unlocking rod 5 to move to the right, causing the second end 532 of the slide groove 53 to contact the trigger shaft 162. The slide groove 53 avoids the trigger shaft 162, ensuring that the locking part 3 and the locking part 2 are quickly and reliably limited.

[0078] When closing the circuit breaker, if Figure 4 As shown, the closing half-shaft 16 rotates counterclockwise to release the energy storage mechanism, which drives the trigger shaft 162 to push the second end 532 of the slide groove 53, causing the unlocking rod 5 to drive the locking member 3 to rotate counterclockwise until the locking member 3 disengages from the locking member 2 and releases the limit, causing the main shaft 12 to rotate under the drive of the released energy storage mechanism. Figure 3 The diagram shows the main shaft in the closed position. Simultaneously, the main shaft 12 drives the locking member 2 to rotate to a position opposite to the locking part 31 of the locking member 3. The locking part 31, driven by the locking spring 4, remains in contact with the locking member 2. At this point, the closing operation is complete. Figure 5 As shown, the closing half-shaft 16 then rotates counterclockwise to reset under the drive of the half-shaft spring. The trigger shaft 162 of the closing half-shaft 16 slides from the second end 532 of the slide groove 53 towards the first end 531, as shown. Figure 3 As shown, the closing half-shaft 16 is reset to its position, and the trigger shaft 162 slides to the first end 531 of the slide groove 53. At this time, there is a gap between the trigger shaft 162 and the second end 532, leaving room for the unlocking rod 5 to move. When the locking member 2 moves to the first end 531 of the slide groove 53 again, the locking half-shaft 162 returns to its position. Figure 4 When the locking position is shown, the locking element 3 can be immediately stopped by the locking element 2 under the drive of the locking spring 4, thereby ensuring that the locking element 3 is in a ready state.

[0079] As a second embodiment of the avoidance structure, the trigger part 52 and the trigger shaft 162 adopt a non-nested, spaced-out engagement method. The trigger part 52 is provided with a push surface with an arc-shaped profile, and the trigger shaft 162 is spaced apart from the push surface. When closing, the closing half shaft 16 rotates, causing the trigger shaft 162 to gradually approach and abut against the push surface, thereby pushing the trigger shaft 162 to rotate. When resetting, the trigger shaft 162 rotates in the opposite direction with the closing half shaft 16, gradually separating from the push surface and creating a gap, thereby achieving motion avoidance and preventing the closing half shaft 16 from interfering with the locking member 3.

[0080] As a third embodiment of the avoidance structure, the locking element 3 and the unlocking rod 5 adopt a nested cooperation method. The sliding groove 53 is set on one of the locking element 3 and the driving part 51, and the other is provided with a driving shaft nested in the sliding groove 53, which can slide within the sliding groove 53. During the closing process, the closing half shaft 16 drives the unlocking rod 5 to rotate, and drives the locking element 3 to rotate and unlock through the sliding groove 53 and the driving shaft. When the closing half shaft 16 resets, it drives the unlocking rod 5 to rotate in the opposite direction. The sliding groove 53 provides movement space for the driving shaft, realizing avoidance and ensuring smooth reset of the closing half shaft 16, avoiding interference between the closing half shaft 16 and the locking element 3. Of course, the locking element 3 and the unlocking rod 5 can also adopt a non-nested, spaced cooperation method.

[0081] like Figure 6 As shown, the locking member 2 includes an annular fixing part 21. The fixing part 21 has a fixing hole 22 in the middle, which is fixedly connected to the main shaft 12. The outer side of the fixing part 21 protrudes radially to form a locking part 23 that cooperates with the locking buckle part 31. As another embodiment of the locking member 2, the locking member 2 can be installed on the cantilever or integrally formed with the cantilever, or the cantilever can be directly used as the locking member 2. The locking buckle part 3 prevents the main shaft 12 from springing back by limiting the cantilever.

[0082] like Figure 7 As shown, one end of the locking member 3 is provided with a mounting hole 32 and a driving hole 33, and the other end is provided with a locking part 23. The mounting hole 32 is rotatably connected to the side plate 14 through a mounting shaft 34, and the driving hole 33 is rotatably connected to the unlocking rod 5 through a driving shaft 35. The unlocking rod 5 can drive the locking member 3 to rotate around the mounting shaft 34 as the axis. The middle part of the locking member 3 is bent away from the locking member 2 to form a locking groove 36. The locking part 31 is protruding at the bottom of the locking groove 36. The bottom of the locking groove 36 matches the contour of the locking part 23 of the locking member 2. When the locking part 31 and the locking part 23 are misaligned, the locking part 23 is embedded in the locking groove 36.

[0083] Preferably, the outer wall of the locking part 23 is arc-shaped, and the top of the latching part 31 is provided with an arc-shaped sliding surface 311. The sliding surface 311 slides and engages with the outer wall of the locking part 23 when the switch is opened, and the two are in line contact when sliding and engaging, which can reduce friction.

[0084] 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.

[0085] 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 main shaft (12), an energy storage mechanism, and a closing half-shaft (16), wherein the main shaft (12) is rotatable between a main shaft closed position and a main shaft open position, and the closing half-shaft (16) is used to release the energy storage mechanism, thereby driving the main shaft (12) to rotate from the main shaft open position to the main shaft closed position, characterized in that, Also includes: The locking element (2) is connected to the main shaft (12) and is provided with a locking part (23); The locking element (3) is rotatably configured and has a locking part (31) that cooperates with the locking element (2); The locking spring (4) is connected to the locking member (3) and is used to drive the locking part (31) to rotate in the direction of the locking member (2); The unlocking lever (5) is provided with a drive part (51) that cooperates with the locking buckle (3) and a trigger part (52) that cooperates with the closing half shaft (16); During the opening of the circuit breaker, as the main shaft (12) rotates from the main shaft closed position to the main shaft open position, the locking member (2) rotates with the main shaft (12) and the locking part (23) slides against the locking part (31) of the locking member (3), compressing the locking spring (4); when the main shaft (12) rotates to the main shaft open position, the locking part (23) and the locking part (31) are misaligned, and the locking spring (4) drives the locking part (31) to insert into the side of the locking part (23) that rotates towards the main shaft closed position, blocking the locking part (23) to prevent the main shaft (12) from rebounding; When the circuit is closed, the closing half shaft (16) rotates to release the energy storage mechanism, and at the same time, the trigger part (52) drives the unlocking rod (5). The unlocking rod (5) pushes the locking fastener (3) through the drive part (51) to release the locking part (23), so that the energy storage mechanism that releases energy drives the main shaft (12) 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: It includes two side plates (14), a main shaft (12), a linkage mechanism (13), an energy storage shaft, a cam mechanism, and an energy storage mechanism; the main shaft (12) and the energy storage shaft are rotatably mounted on the two side plates (14), the linkage mechanism (13), the cam mechanism, and the energy storage mechanism are mounted between the two side plates (14), the main shaft (12) is used to connect with the moving contact, the linkage mechanism (13) is connected to the main shaft (12), the cam mechanism is fixed on the energy storage shaft and is used to drive the energy storage mechanism to store energy, and when the energy storage mechanism releases energy, it drives the linkage mechanism (13) to drive the main shaft (12) to rotate from the main shaft open position to the main shaft closed position.

3. The anti-rebound operating mechanism according to claim 2, characterized in that: The locking member (2), the latch (3), and the unlocking rod (5) are located on the side of one of the side plates (14) away from the other side plate (14). The latch (3) and the unlocking rod (5) are located between the main shaft (12) and the closing half shaft (16). The two ends of the unlocking rod (5) are connected to the latch (3) and the closing half shaft (16) respectively. The closing half shaft (16) is rotatably mounted on the two side plates (14). The side plate (14) located between the closing half shaft (16) and the unlocking rod (5) is provided with a clearance hole corresponding to the closing half shaft (16). The closing half shaft (16) is provided with a trigger shaft (162). The trigger shaft (162) extends from the clearance hole to the outside of the side plate (14) and cooperates with the unlocking rod (5).

4. The anti-rebound operating mechanism according to claim 2, characterized in that: The locking element (3) is located on one side of the locking element (2) in the radial direction. The locking element (3) is rotatably connected to the side plate (14) through the mounting shaft (34). The locking spring (4) is a torsion spring, which is sleeved on the mounting shaft (34) and its two ends are connected to the locking element (3) and the side plate (14) respectively.

5. The anti-rebound operating mechanism according to claim 3, characterized in that: The two ends of the closing half shaft (16) are rotatably connected to the two side plates (14) through the closing rotating shaft (161); The closing half-shaft (16) is also equipped with: The trigger shaft (162) is arranged parallel to the closing shaft (161) and is located on one side of the radial direction of the corresponding closing shaft (161); The blocking part (163) is used to block the locking lever (17) and lock the energy storage mechanism in the energy storage state; A clearance slot (164) is used to avoid the locking lever (17) during the closing process to release the energy storage mechanism; The blocking part (163) and the clearance groove (164) are located on opposite sides of the closing half shaft (16) in the radial direction. When the closing half shaft (16) rotates to make the clearance groove (164) correspond to the locking lever (17), the closing half shaft (16) releases the locking lever (17) and releases the energy storage mechanism. The anti-rebound operating mechanism also includes a half-shaft spring connected between the side plate (14) and the closing half-shaft (16), which provides a restoring force to the closing half-shaft (16) and drives the closing half-shaft (16) to rotate to the position where the blocking part (163) corresponds to the locking lever (17).

6. The anti-rebound operating mechanism according to claim 1, characterized in that: One of the unlocking rod (5) and the locking member (3) is provided with a clearance structure. When the locking spring (4) drives the locking part (31) to be limited to the locking member (2), the clearance structure provides space for the locking member (3) to move.

7. The anti-rebound operating mechanism according to claim 5 or 6, characterized in that: The driving part (51) of the unlocking rod (5) is rotatably connected to the locking member (3). The trigger part (52) of the unlocking rod (5) is provided with a sliding groove (53) as a clearance structure. The closing half shaft (16) is provided with a trigger shaft (162) for driving the unlocking rod (5) to rotate. The trigger shaft (162) is nested in the sliding groove (53) and can slide along the sliding groove (53). While the locking spring (4) drives the locking part (31) and the locking member (2) to limit the position, the unlocking rod (5) moves with the locking member (3) and drives the sliding groove (53) to slide relative to the trigger shaft (162). When the closing half shaft (16) rotates to reset, it drives the trigger shaft (162) to slide along the sliding groove (53).

8. The anti-rebound operating mechanism according to claim 6, characterized in that: One of the locking member (3) and the driving part (51) is provided with a groove (53) as a clearance structure, and the other is provided with a driving shaft nested in the groove (53), which can slide within the groove (53).

9. The anti-rebound operating mechanism according to claim 1, characterized in that: One end of the locking member (3) is provided with a mounting hole (32) and a driving hole (33), and the other end is provided with a locking part (23). The mounting hole (32) is rotatably connected to the side plate (14) through a mounting shaft (34), and the driving hole (33) is rotatably connected to the unlocking rod (5) through a driving shaft (35). The middle part of the locking member (3) is bent away from the locking member (2) to form a locking groove (36). The locking part (31) is protruding at the bottom of the locking groove (36). When the locking part (31) and the locking part (23) are misaligned, the locking part (23) is embedded in the locking groove (36).

10. The anti-rebound operating mechanism according to claim 1, characterized in that: The locking member (2) includes an annular fixing part (21), the middle part of which is provided with a fixing hole (22) that is fixedly connected to the main shaft (12), and the outer side of the fixing part (21) protrudes radially to form a locking part (23) that cooperates with the latching part (31); the outer wall of the locking part (23) is arc-shaped, and the top of the latching part (31) is provided with an arc-shaped sliding surface (311), which slides with the outer wall of the locking part (23) when the switch is opened.

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