breaker

Abstract

The present invention relates to the field of low-voltage electrical appliances, and in particular to a circuit breaker, wherein two ends of a main shaft are respectively rotatably matched with two side plates of a side plate assembly, a stop cantilever is arranged on the main shaft and rotates synchronously therewith, two ends of the stop shaft are respectively arranged on two side plates, and an anti-rebound mechanism comprises an anti-rebound part; when the opening half shaft rotates from an initial position to an action position to open the circuit breaker and the opening half shaft remains in the action position, the anti-rebound part rotates from an unlocked position to a locked position, and after the stop cantilever rotates in the opening direction to hit the stop shaft, the stop cantilever is limitedly matched with the anti-rebound part to prevent the stop cantilever from rebounding in the closing direction, and when the opening half shaft rotates from the action position to the initial position, the opening half shaft drives the anti-rebound part to rotate from the locked position to the unlocked position, and the anti-rebound part releases the limited matching with the stop cantilever; in the circuit breaker of the present invention, the anti-rebound mechanism cooperates with the opening half shaft, so that the anti-rebound structure is effective only when the opening half shaft remains in the action position.

Description

Technical Field

[0001] The invention relates to the field of low-voltage electrical appliances, and in particular to a circuit breaker. Background Art

[0002] The circuit breaker opens very quickly and the circuit breaker mechanism is made of rigid materials, which leads to serious bouncing phenomenon when the circuit breaker opens. That is, the moving and static contacts of the circuit breaker will rebound greatly when reaching the final opening position (maximum opening distance), and the rebound amplitude can reach half of the opening distance. When the circuit breaker breaks a large current, this rebound will cause the arc to fail to extinguish in time or even reignite, seriously affecting the breaking capacity of the circuit breaker.

[0003] The contact opening anti-rebound structure used in existing low-voltage circuit breakers, especially low-voltage universal circuit breakers, utilizes inertia to form an interlock to prevent the moving contact from rebounding significantly after opening. This solution has poor reliability and is prone to failure. Moreover, the existing contact opening anti-rebound structure cannot effectively distinguish whether the circuit breaker is interrupting a fault current, resulting in the anti-rebound structure taking effect when the circuit breaker is normally opened or interrupting a fault current, releasing all the energy inside the operating mechanism of the circuit breaker, affecting the service life of the operating mechanism. Summary of the invention

[0004] The object of the present invention is to overcome the defects of the prior art and provide a circuit breaker, wherein the anti-rebound mechanism cooperates with the opening half-shaft so that the anti-rebound structure is effective only when the opening half-shaft is kept in the operating position.

[0005] To achieve the above object, the present invention adopts the following technical solutions:

[0006] A circuit breaker comprises a side plate assembly 1, a main shaft 2, a stop shaft 1a, a stop cantilever 3 and a switch-off half shaft 6, wherein the side plate assembly 1 comprises two side plates arranged at a relative interval, the two ends of the main shaft 2 are respectively rotatably matched with the two side plates, the stop cantilever 3 is arranged on the main shaft 2 and rotates synchronously therewith, and the two ends of the stop shaft 1a are respectively arranged on the two side plates; the circuit breaker further comprises an anti-rebound mechanism, the anti-rebound mechanism comprises a pivotally arranged anti-rebound member 4; the switch-off half shaft 6 rotates from an initial position to a dynamic position When the operating position opens the circuit breaker and the opening half-shaft 6 remains in the operating position, the anti-rebound component 4 rotates from the unlocking position to the locking position, and the stopping cantilever 3 rotates in the opening direction until it hits the stopping shaft 1a. The stopping cantilever 3 and the anti-rebound component 4 are limited and cooperated to prevent the stopping cantilever 3 from rebounding in the closing direction. When the opening half-shaft 6 rotates from the operating position to the initial position, the opening half-shaft 6 drives the anti-rebound component 4 to rotate from the locking position to the unlocking position, and the anti-rebound component 4 releases the limit cooperation with the stopping cantilever 3.

[0007] Preferably, the anti-rebound mechanism further comprises a pivotally arranged connecting rod 5 , and the opening brake half shaft 6 is driven and cooperated with the anti-rebound component 4 through the connecting rod 5 .

[0008] Preferably, the opening gate half-shaft 6 includes a opening gate half-shaft transmission column 60, and the anti-rebound component 4 includes an anti-rebound component limit platform 41; when the opening gate half-shaft 6 rotates from the initial position to the action position, the opening gate half-shaft 6 drives the opening gate half-shaft transmission column 60 to swing, and the opening gate half-shaft transmission column 60 drives the connecting rod 5 to rotate, and the connecting rod 5 avoids the anti-rebound component 4, and the anti-rebound component 4 rotates from the unlocked position to the locked position; when the opening gate half-shaft 6 rotates from the action position to the initial position, the opening gate half-shaft 6 drives the opening gate half-shaft transmission column 60 to swing, and the opening gate half-shaft transmission column 60 avoids the connecting rod 5, and the connecting rod 5 rotates and drives the anti-rebound component 4 from the locked position to the unlocked position through the anti-rebound component limit platform 41.

[0009] Preferably, the anti-rebound component 4 and the connecting rod 5 are respectively pivotally arranged on the side plate assembly 1, and the anti-rebound component 4 and the connecting rod 5 are respectively arranged on both sides of the same side plate; the side plate is provided with a first limiting hole 11 and a second limiting hole 12, the anti-rebound component limiting platform 41 is movably inserted in the first limiting hole 11 and passes through the first limiting hole 11 to cooperate with the connecting rod 5, and the opening brake half-shaft transmission column 60 is movably inserted in the second limiting hole 12 and passes through the second limiting hole 12 to cooperate with the connecting rod 5.

[0010] Preferably, when the anti-rebound component 4 is located at the locking position, the anti-rebound component limiting platform 41 abuts against a side wall of one end of the first limiting hole 11 .

[0011] Preferably, one end of the connecting rod 5 is pivotally arranged on the side plate assembly 1, the other end cooperates with the opening brake half-shaft transmission column 60, and the middle part cooperates with the anti-rebound component limit platform 41.

[0012] Preferably, the connecting rod 5 includes a first connecting rod contact surface 50 and a second connecting rod contact surface 51 set at one end thereof, the first connecting rod contact surface 50 is an arc surface, and the second connecting rod contact surface 51 is a plane, when the opening half-shaft 6 is in the initial position, the opening half-shaft transmission column 60 abuts against the first connecting rod contact surface 50, and when the opening half-shaft 6 is in the action position, the opening half-shaft transmission column 60 abuts against the second connecting rod contact surface 51.

[0013] Preferably, the circuit breaker also includes a trip half-shaft reset spring 9, which applies a force to the trip half-shaft 6 to rotate it from the action position to the initial position; the anti-rebound mechanism also includes an anti-rebound component reset spring 7 and a connecting rod reset spring 8, the anti-rebound component reset spring 7 applies a force to the anti-rebound component 4 to rotate it from the unlocked position to the locked position, and the connecting rod reset spring 8 applies a force to the connecting rod 5 to rotate it and drive the anti-rebound component 4 to rotate from the locked position to the unlocked position.

[0014] Preferably, when the anti-rebound component 4 is in the locked position, after one end of the stopping cantilever 3 hits the stopping shaft 1a, the other end cooperates with the anti-rebound component 4 to prevent the stopping cantilever 3 from rebounding in the closing direction.

[0015] Preferably, the stopping cantilever 3 includes a stopping cantilever limiting groove 310, and the anti-rebound component 4 includes an anti-rebound component limiting angle 42. The stopping cantilever limiting groove 310 cooperates with the anti-rebound component limiting angle 42 to prevent the stopping cantilever 3 from rebounding in the closing direction.

[0016] Preferably, the stopping cantilever 3 also includes a stopping cantilever contact finger 311 serving as a side wall of the stopping cantilever limit groove 310; the circuit breaker also includes an overcurrent release, which drives the opening half-shaft 6 to rotate from the initial position to the action position to open the circuit breaker, and when the overcurrent release keeps the opening half-shaft 6 in the action position, the anti-rebound component 4 rotates from the unlocked position to the locked position, and the stopping cantilever 3 rotates in the opening direction to hit the stopping shaft 1a, and at the same time, the stopping cantilever contact finger 311 squeezes the anti-rebound component limit angle 42 and the stopping cantilever contact finger 311 moves from one side of the anti-rebound component limit angle 42 to the other side, so that the stopping cantilever limit groove 310 and the anti-rebound component limit angle 42 are relatively matched, and the stopping cantilever contact finger 311 and the anti-rebound component limit angle 42 are limitedly matched to prevent the stopping cantilever 3 from rebounding in the closing direction.

[0017] Preferably, the stopping cantilever 3 comprises a switch opening stopping arm 30 and a switch opening locking arm 31 respectively arranged at two ends thereof, and a stopping cantilever limiting groove 310 and a stopping cantilever contact finger 311 are provided at the free end of the switch opening locking arm 31 .

[0018] Preferably, the circuit breaker also includes an overcurrent releaser, which is actuated and driven by the opening half-shaft transmission column 60 through its pressure plate 3a, driving the opening half-shaft 6 to rotate from the initial position to the action position and keeping the opening half-shaft 6 in the action position; when the overcurrent releaser is reset, the opening half-shaft 6 rotates from the action position to the initial position.

[0019] Preferably, the axis of the main shaft 2, the axis of the stop shaft 1a, the axis of the opening half shaft 6, the axis of the rotating shaft of the anti-rebound component 4 and the axis of the rotating shaft of the connecting rod 5 are parallel to each other and are perpendicular to the side plate assembly 1, and the axis of the main shaft 2, the axis of the stop shaft 1a, the axis of the opening half shaft 6 and the axis of the rotating shaft of the anti-rebound component 4 are located at the four vertices of a quadrilateral.

[0020] Preferably, the circuit breaker further comprises a contact driving arm 2a arranged on the main shaft 2 and rotating synchronously therewith, and the contact driving arm 2a is drivingly connected to the moving contact of the circuit breaker.

[0021] The circuit breaker of the present invention has an anti-rebound member 4 that cooperates with the opening half-shaft 6. The anti-rebound mechanism works only when the opening half-shaft 6 is actuated and not reset (generally occurs when the circuit breaker breaks a fault current, for example, the overcurrent releaser is actuated to drive the opening half-shaft 6 to rotate to open the circuit breaker). Therefore, the working frequency of the anti-rebound mechanism is significantly reduced, and the energy release inside the operating mechanism of the circuit breaker is reduced, which is beneficial to improving the service life of the operating mechanism. Moreover, the anti-rebound mechanism of the circuit breaker of the present invention is different from the existing anti-rebound mechanism that uses inertia to form an interlocking, and is implemented by a reliable mechanical transmission chain, so that the operation is more reliable and the stability is higher. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic structural diagram of a first embodiment of a circuit breaker of the present invention, and the circuit breaker is in an open state;

[0023] Figure 2 It is a schematic structural diagram of the first embodiment of the circuit breaker of the present invention, and the circuit breaker starts to open;

[0024] Figure 3 It is a structural schematic diagram of the first embodiment of the circuit breaker of the present invention, which at least shows that during the circuit breaker opening process, the opening half-shaft is kept in the action position, and the cantilever contact finger of the blocking arm begins to squeeze the limit angle of the anti-rebound component;

[0025] Figure 4 It is a structural schematic diagram of the first embodiment of the circuit breaker of the present invention, which at least shows that when the circuit breaker is in the opening process and the opening half-shaft is kept in the action position, the stop cantilever rebounds slightly and cooperates with the anti-rebound part to prevent the stop cantilever from further rebounding;

[0026] Figure 5 It is a schematic structural diagram of a first embodiment of a circuit breaker of the present invention, which at least shows the matching relationship between the overcurrent release pressure plate and the opening half shaft;

[0027] Figure 6 It is a schematic diagram of the structure of the opening half-axis of the present invention;

[0028] Figure 7 It is a structural schematic diagram of a second embodiment of a circuit breaker of the present invention, in which the overcurrent release is actuated to start opening the circuit breaker;

[0029] Figure 8 It is a structural schematic diagram of the second embodiment of the circuit breaker of the present invention. After the overcurrent releaser is actuated to open the circuit breaker, the stop cantilever and the anti-rebound component are limitedly matched;

[0030] Fig. 9 It is a structural schematic diagram of the second embodiment of the circuit breaker of the present invention, the circuit breaker is in the open state, the overcurrent release is reset so that the anti-rebound part and the stop cantilever release the limit cooperation;

[0031] Fig.10 It is a schematic diagram of the three-dimensional structure of the second embodiment of the circuit breaker of the present invention. DETAILED DESCRIPTION

[0032] The following is combined with Figure 1-10 The following embodiments are provided to further illustrate the specific implementation of the circuit breaker of the present invention. The circuit breaker of the present invention is not limited to the description of the following embodiments.

[0033] like Figure 1-6 FIG. 1 is an embodiment of the circuit breaker of the present invention.

[0034] The circuit breaker of the present invention comprises a side plate assembly 1, a main shaft 2, a stop shaft 1a, a stop cantilever 3 and a switch-off half shaft 6. The side plate assembly 1 comprises two side plates arranged at a relative interval, the two ends of the main shaft 2 are respectively rotatably matched with the two side plates, the stop cantilever 3 is arranged on the main shaft 2 and rotates synchronously with it, and the two ends of the stop shaft 1a are respectively arranged on the two side plates; the circuit breaker also comprises an anti-rebound mechanism, and the anti-rebound mechanism comprises a pivotally arranged anti-rebound member 4; the switch-off half shaft 6 rotates from an initial position to When the action position causes the circuit breaker to open and the opening half-shaft 6 remains in the action position, the anti-rebound component 4 rotates from the unlocked position to the locked position, and after the stopping cantilever 3 rotates toward the opening position until it hits the stopping shaft 1a, the stopping cantilever 3 and the anti-rebound component 4 limit cooperation to prevent the stopping cantilever 3 from rebounding in the closing direction. When the opening half-shaft 6 rotates from the action position to the initial position, the opening half-shaft 6 drives the anti-rebound component 4 to rotate from the locked position to the unlocked position, and the anti-rebound component 4 releases the limit cooperation with the stopping cantilever 3.

[0035] The circuit breaker of the present invention has an anti-rebound member 4 that cooperates with the opening half-shaft 6. The anti-rebound mechanism works only when the opening half-shaft 6 is actuated and not reset (generally occurs when the circuit breaker breaks a fault current, for example, the overcurrent releaser is actuated to drive the opening half-shaft 6 to rotate to open the circuit breaker). Therefore, the working frequency of the anti-rebound mechanism is significantly reduced, and the energy release inside the operating mechanism of the circuit breaker is reduced, which is beneficial to improving the service life of the operating mechanism. Moreover, the anti-rebound mechanism of the circuit breaker of the present invention is different from the existing anti-rebound mechanism that uses inertia to form an interlocking, and is implemented by a reliable mechanical transmission chain, so that the operation is more reliable and the stability is higher.

[0036] It should be pointed out that the “stop arm 3 rebounds in the closing direction” means that after the stop arm 3 quickly hits the stop shaft 1a, the stop arm 3 rotates in the closing direction driven by the reaction force of the stop shaft 1a.

[0037] Preferably, Figure 1-5As shown, the stop arm 3 includes a stop arm limit groove 310, and the anti-rebound component 4 includes an anti-rebound component limit angle 42. The stop arm limit groove 310 and the anti-rebound component limit angle 42 are limited and cooperated to prevent the stop arm 3 from rebounding in the closing direction. Figure 1-5 As shown, the blocking cantilever 3 also includes a blocking cantilever contact finger 311 as a side wall of the blocking cantilever limit groove 310; when the opening half shaft 6 rotates from the initial position to the action position to open the circuit breaker and the opening half shaft 6 remains in the action position, the anti-rebound member 4 rotates to the locking position, and the blocking cantilever 3 rotates in the opening direction to hit the blocking shaft 1a, and at the same time, the blocking cantilever contact finger 311 squeezes the anti-rebound member limit angle 42 and the blocking cantilever contact finger 311 moves from one side of the anti-rebound member limit angle 42 to the other side, so that the blocking cantilever limit groove 310 is opposite to the anti-rebound member limit angle 42, and the blocking cantilever contact finger 311 is limitedly matched with the anti-rebound member limit angle 42 to prevent the blocking cantilever 3 from rebounding in the closing direction. The anti-rebound member 4 directly cooperates with the blocking cantilever 3, which improves the reliability and stability of the cooperation between the two and ensures the effective operation of the anti-rebound mechanism.

[0038] Preferably, Figure 5 As shown, the circuit breaker of the present invention also includes an overcurrent release, which is driven and cooperated with the opening half-shaft transmission column 60 through the pressure plate 3a, driving the opening half-shaft 6 to rotate from the initial position to the action position to open the circuit breaker.

[0039] like Figure 7-10 FIG. 2 shows another embodiment of the circuit breaker of the present invention.

[0040] The difference between the circuit breaker of this embodiment and the above-mentioned embodiment is that: there is no driving relationship between the opening half-axis 6 and the anti-rebound component 4, but the overcurrent releaser is driven and cooperates with the anti-rebound component 4; specifically, when the overcurrent releaser is actuated to open the circuit breaker, the anti-rebound component 4 rotates from the unlocked position to the locked position, and the blocking cantilever 3 rotates in the opening direction until it hits the blocking shaft 1a, and the blocking cantilever 3 and the anti-rebound component 4 are limited and cooperated to prevent the blocking cantilever 3 from rebounding in the closing direction. When the overcurrent releaser is reset, the anti-rebound component 4 is driven to rotate from the locked position to the unlocked position, and the anti-rebound component 4 releases the limited cooperation with the blocking cantilever 3.

[0041] In the circuit breaker of the present invention, the anti-rebound member 4 cooperates with the overcurrent releaser. The anti-rebound mechanism works only when the overcurrent releaser is actuated (i.e., when the circuit breaker breaks the fault current). Therefore, the working frequency of the anti-rebound mechanism is significantly reduced, and the energy release inside the operating mechanism of the circuit breaker is reduced, which is beneficial to improving the service life of the operating mechanism. Moreover, the anti-rebound mechanism of the circuit breaker of the present invention is different from the existing anti-rebound mechanism that uses inertia to form interlocking. It is realized by a reliable mechanical transmission chain, and the operation is more reliable and the stability is higher.

[0042] Preferably, Figure 7-10 As shown, the anti-rebound mechanism further includes a pivotally arranged connecting rod 5, and the overcurrent release is driven and matched with the anti-rebound member 4 through the connecting rod 5. Figure 7-10 As shown, the overcurrent release includes a rotatably arranged pressure plate 3a. The overcurrent release is actuated to cause the pressure plate 3a to swing from the reset position to the driving position. The pressure plate 3a drives the connecting rod 5 to rotate to avoid the anti-rebound component 4. The anti-rebound component 4 rotates from the unlocking position to the locking position. The overcurrent release is reset to cause the pressure plate 3a to swing from the driving position to the reset position and avoid the connecting rod 5. The connecting rod 5 rotates and drives the anti-rebound component 4 to rotate from the locking position to the unlocking position.

[0043] like Figure 1-6 FIG. 1 shows a first embodiment of a circuit breaker according to the present invention.

[0044] like Figure 1-6 As shown, the circuit breaker of the present invention comprises a side plate assembly 1, a main shaft 2, a stop shaft 1a, a stop cantilever 3, a switch-off half shaft 6 and an anti-rebound mechanism; the side plate assembly 1 comprises two side plates arranged at a relative interval, the two ends of the main shaft are respectively rotatably matched with the two side plates, the stop cantilever 3 is arranged on the main shaft 2 and rotates synchronously therewith, and the two ends of the stop shaft 1a are respectively arranged on the two side plates; the anti-rebound mechanism comprises a pivotally arranged anti-rebound member 4; the switch-off half shaft 6 rotates from the initial position to the action position When the opening half-shaft 6 is in the operating position, the anti-rebound component 4 rotates from the unlocking position to the locking position. After the stopping cantilever 3 rotates in the opening direction until it hits the stopping shaft 1a, the stopping cantilever 3 and the anti-rebound component 4 are limited and cooperated to prevent the stopping cantilever 3 from rebounding in the closing direction. When the opening half-shaft 6 is rotated from the operating position to the initial position, the opening half-shaft 6 drives the anti-rebound component 4 to rotate from the locking position to the unlocking position, and the anti-rebound component 4 releases the limit cooperation with the stopping cantilever 3.

[0045] Preferably, Figure 5 As shown, the circuit breaker of the present invention includes an overcurrent release, and the overcurrent release includes a rotatably arranged pressure plate 3a. The overcurrent release is driven by the pressure plate 3a and the opening half-shaft transmission column 60 of the opening half-shaft 6, driving the opening half-shaft 6 to rotate from the initial position to the action position and keep the opening half-shaft 6 in the opening position; when the overcurrent release is reset, the opening half-shaft 6 rotates from the action position to the initial position. Further, as Figure 1-5 As shown in 7-10, the overcurrent release is actuated to cause the pressure plate 3a to swing from the reset position to the driving position, and the pressure plate 3a drives the opening half shaft 6 to rotate from the initial position to the action position; the overcurrent release is reset to cause the pressure plate 3a to swing from the driving position to the reset position and avoid the opening half shaft 6, and the opening half shaft 6 rotates from the action position to the initial position. Specifically, as Figure 5As shown, a U-shaped pressure plate connecting groove is provided in the middle of the pressure plate 3a for driving cooperation with the overcurrent release, and one end is arranged above the opening half-shaft transmission column 60 and is driven to cooperate with it.

[0046] It should be pointed out that the circuit breaker of the present invention is preferably a circuit breaker with an energy storage operating mechanism, wherein the side panel assembly 1, the main shaft 2, the stop shaft 1a, the stop cantilever 3, the opening half shaft 6 and the overcurrent release are all inherent components of the energy storage operating mechanism; the rotation of the main shaft 2 can drive the moving contact and the static contact of the circuit breaker to close / open, thereby realizing the closing / opening of the circuit breaker. Furthermore, the energy storage operating mechanism also includes an opening button that cooperates with the opening half shaft 6. The user presses the opening button to rotate the opening half shaft 6 from the initial position to the action position, driving the circuit breaker to open. When an overcurrent occurs in the circuit breaker, the overcurrent release is actuated to drive the opening half shaft 6 to rotate, causing the circuit breaker to trip and open. Preferably, as Figure 1-5 As shown, the circuit breaker of the present invention further comprises a contact driving arm 2a which is arranged on the main shaft 2 and rotates synchronously therewith, and the contact driving arm 2a is drivingly connected to the moving contact of the circuit breaker.

[0047] Preferably, Figure 1-5 As shown, the anti-rebound mechanism further includes a pivotally arranged connecting rod 5, and the opening half shaft 6 is driven and matched with the anti-rebound member 4 through the connecting rod 5. Figure 1-5 As shown, the opening half shaft 6 includes an opening half shaft transmission column 60, and the anti-rebound component 4 includes an anti-rebound component limiting platform 41; Figure 2-4 As shown, the opening half-shaft 6 rotates from the initial position to the action position, the opening half-shaft 6 drives the opening half-shaft transmission column 60 to swing, the opening half-shaft transmission column 60 drives the connecting rod 5 to rotate, the connecting rod 5 avoids the anti-rebound component 4, and the anti-rebound component 4 rotates from the unlocked position to the locked position; when the opening half-shaft 6 rotates from the action position to the initial position, the opening half-shaft 6 drives the opening half-shaft transmission column 60 to swing, the opening half-shaft transmission column 60 avoids the connecting rod 5, the connecting rod 5 rotates and drives the anti-rebound component 4 to rotate from the locked position to the unlocked position through the anti-rebound component limit platform 41.

[0048] Preferably, Figure 1-5 As shown, the axis of the main shaft 2, the axis of the stop shaft 1a, the axis of the opening half shaft 6, the axis of the anti-rebound member 4 and the axis of the connecting rod 5 are parallel to each other and perpendicular to the side plate assembly 1, and the axis of the main shaft 2, the axis of the stop shaft 1a, the axis of the opening half shaft 6 and the axis of the anti-rebound member 4 are located at the four vertices of a quadrilateral. Figure 1-5 As shown, the connecting rod 5 is arranged close to the opening half shaft 6 and the anti-rebound component 4 and is located between the two.

[0049] Preferably, Figure 4As shown, when the anti-rebound component 4 is in the locked position, after one end of the blocking cantilever 3 hits the blocking shaft 1a, the other end cooperates with the anti-rebound component 4 to prevent the blocking cantilever 3 from rebounding in the closing direction.

[0050] Preferably, Figure 1 As shown, the circuit breaker of the present invention further includes a trip half-shaft reset spring 9, which applies a force to the trip half-shaft 6 to rotate it from the action position to the initial position; the anti-rebound member mechanism further includes an anti-rebound member reset spring 7 and a connecting rod reset spring 8, the anti-rebound member reset spring 7 applies a force to the anti-rebound member reset spring 4 to rotate it from the unlocked position to the locked position, and the connecting rod reset spring 8 applies a force to the connecting rod 5 to rotate it and drive the anti-rebound member 4 to rotate from the locked position to the unlocked position. Further, the trip half-shaft reset spring 9, the anti-rebound member reset spring 7 and the connecting rod reset spring 8 are all torsion springs.

[0051] Specifically, Figure 2-4 In the direction shown, when the opening half-shaft 6 rotates from the initial position to the action position and the opening half-shaft 6 remains in the action position, the opening half-shaft 6 drives the opening half-shaft transmission column 60 to swing in the clockwise direction, and the opening half-shaft transmission column 60 drives the connecting rod 5 to rotate counterclockwise to avoid the anti-rebound component 4, and the anti-rebound component 4 rotates counterclockwise from the unlocked position to the locked position under the action of the anti-rebound component reset spring 7, and at the same time, the blocking cantilever 3 rotates counterclockwise (opening direction) until the left end of the blocking cantilever 3 hits the blocking shaft 1a, and the right end of the blocking cantilever 3 cooperates with the anti-rebound component 4 to prevent the blocking cantilever 3 from rotating in the clockwise direction (closing direction); Figure 1 In the direction shown, when the opening half-shaft 6 is reset from the action position to the initial position under the action of the opening half-shaft reset spring 9, the opening half-shaft 6 drives the opening half-shaft transmission column 60 to swing counterclockwise, and the opening half-shaft transmission column 60 avoids the connecting rod 5. The connecting rod 5 rotates clockwise under the action of the connecting rod reset spring 8 and drives the anti-rebound component 4 to rotate from the locked position to the unlocked position. The anti-rebound component 4 avoids the right end of the cantilever 3, and the two release the limit cooperation. Through the above process, it can be known that when the circuit breaker of the present invention interrupts the fault current, the overcurrent releaser is actuated and the opening half-shaft 6 is maintained in the actuated position through the pressure plate 3a. At this time, the anti-rebound mechanism takes effect, which can effectively prevent the rebound of the blocking cantilever 3, that is, prevent the rebound of the moving contact of the circuit breaker, and ensure the reliable disconnection of the circuit breaker; when the circuit breaker of the present invention is normally opened, for example, the user drives the opening half-shaft 6 to rotate from the initial position to the actuated position through the opening button, and then releases the opening button. The opening half-shaft 6 is automatically reset to the initial position under the action of the opening half-shaft reset spring 9, and also drives the anti-rebound member 4 to rotate to the unlocked position. At this time, the anti-rebound mechanism fails.

[0052] Preferably, Figure 1-5As shown, the anti-rebound component 4 and the connecting rod 5 are respectively pivotally arranged on the side plate assembly 1, and the anti-rebound component 4 and the connecting rod 5 are respectively arranged on both sides of the same side plate. Figure 1-5 As shown, the side plate is provided with a first limiting hole 11 and a second limiting hole 12, the anti-rebound component limiting platform 41 is movably inserted in the first limiting hole 11 and passes through the first limiting hole 11 to cooperate with the connecting rod 5, and the opening half-shaft transmission column 60 is movably inserted in the second limiting hole 12 and passes through the second limiting hole 12 to cooperate with the connecting rod 5.

[0053] Preferably, the side plate assembly 1 includes an assembly space arranged between two side plates, the opening brake half-shaft 6, the anti-rebound component 4, the stop cantilever 3, the stop shaft 1a, and the main shaft 2 are located in the assembly space, and the connecting rod 5 is located on one side of the side plate assembly 1.

[0054] Preferably, Figure 2-4 As shown, when the anti-rebound member 4 is in the locked position, the anti-rebound member limiting platform 41 abuts against a side wall of one end of the first limiting hole 11. Figure 2-4 As shown, under the action of the anti-rebound member reset spring 7, the anti-rebound member limit platform 41 abuts against the right end side wall of the first limit hole 11. It should be pointed out that the circuit breaker of the present invention can also position the anti-rebound member 4 in the locking position by providing a limit rib and a limit shaft (pin) that cooperate with the anti-rebound member 4; the anti-rebound member limit platform 41 can be formed by bending part of the anti-rebound member 4, or it can be a shaft (pin) structure provided on the anti-rebound member 4.

[0055] Preferably, Figure 1-5 As shown in FIG. 1 , an embodiment of the connecting rod 5 is shown: one end of the connecting rod 5 is pivotally mounted on the side plate assembly 1, the other end is engaged with the opening half-shaft transmission column 60, and the middle part is engaged with the anti-rebound component stopper 41. Figure 1-5 As shown, the connecting rod 5 includes a first connecting rod contact surface 50 and a second connecting rod contact surface 51 arranged at one end thereof, the first connecting rod contact surface 50 is an arc surface, and the second connecting rod contact surface 51 is a plane, when the opening half shaft 6 is in the initial position, the opening half shaft transmission column 60 abuts against the first connecting rod contact surface 50, and when the opening half shaft 6 is in the action position, the opening half shaft transmission column 60 abuts against the second connecting rod contact surface 51. It should be pointed out that the first connecting rod contact surface and the second connecting rod contact surface can also be a continuous arc surface.

[0056] Preferably, Figure 2-4 As shown, the stop arm 3 includes a stop arm limit groove 310, and the anti-rebound component 4 includes an anti-rebound component limit angle 42. The stop arm limit groove 310 and the anti-rebound component limit angle 42 are limited and cooperated to prevent the stop arm 3 from rebounding in the closing direction. Figure 2-4As shown, the stopping cantilever 3 also includes a stopping cantilever contact finger 311 serving as a side wall of the stopping cantilever limit groove 310; the disengaging current releaser drives the opening half-shaft 6 to rotate from the initial position to the action position to open the circuit breaker, and when the overcurrent releaser keeps the opening half-shaft 6 in the action position, the anti-rebound component 4 rotates to the locking position, and the stopping cantilever 3 rotates in the opening direction to hit the stopping shaft 1a, and at the same time, the stopping cantilever contact finger 311 squeezes the anti-rebound component limit angle 42 and the stopping cantilever contact finger 311 moves from one side of the anti-rebound component limit angle 42 to the other side, so that the stopping cantilever limit groove 310 and the anti-rebound component limit angle 42 are relatively matched, and the stopping cantilever contact finger 311 and the anti-rebound component limit angle 42 are limitedly matched to prevent the stopping cantilever 3 from rebounding in the closing direction. It should be pointed out that the stopping cantilever 3 may also be provided with a stopping cantilever contact finger 311 instead of a stopping cantilever limiting groove 310, which can also prevent the stopping cantilever 3 from rebounding in the closing direction. Of course, the stopping cantilever 3 can be provided with convex ribs, shafts (pins) and other structures that cooperate with the limiting angle 42 of the anti-rebound component on the stopping cantilever 3, or the limiting angle 42 of the anti-rebound component can be squeezed to achieve the limiting therewith.

[0057] Preferably, Figure 1-4 As shown, the free end surface of the stopping cantilever contact finger 311 is an arc surface, so that when the stopping cantilever contact finger 311 squeezes the anti-rebound component limiting angle 42 and moves from one side of the anti-rebound component limiting angle 42 to the other side thereof, the movement is smoother.

[0058] Preferably, Figure 1-4 As shown, the side surface of the anti-rebound member limit angle 42 that cooperates with the stop cantilever contact finger 311 is an arc surface, so that when the anti-rebound member limit angle 42 releases the limit cooperation with the stop cantilever contact finger 311, the movement is smoother.

[0059] Specifically, Figure 2-4 As shown, when the opening half-shaft 6 is maintained in the action position so that the anti-rebound component 4 is in the locked position, the blocking cantilever 3 rotates counterclockwise until the left end of the blocking cantilever 3 hits the blocking shaft 1a, and at the same time, the blocking cantilever contact finger 311 at the right end of the blocking cantilever 3 squeezes the anti-rebound component limit angle 42 from below the anti-rebound component limit angle 42, so that the anti-rebound component 4 rotates in the clockwise direction (the direction of the unlocked position), and the blocking cantilever contact finger 311 moves from below the anti-rebound component limit angle 42 to above it, and the anti-rebound component limit angle 42 is also reset to the locked position. Then, when the blocking cantilever 3 starts to move in the clockwise direction (closing direction) under the reaction of the blocking shaft 1a, the blocking cantilever contact finger 311 cooperates with the anti-rebound component limit angle 42 to prevent the blocking cantilever 3 from rotating in the clockwise direction (i.e., preventing the blocking cantilever 3 from rebounding in the closing direction).

[0060] Preferably, Figure 1-5As shown in FIG. 1 , an embodiment of the stop arm 3 is shown: the stop arm 3 comprises a switch-off stop arm 30 and a switch-off locking arm 31 respectively arranged at two ends thereof, and a stop arm limit groove 310 and a stop arm contact finger 311 are arranged at the free end of the switch-off locking arm 31. Figure 1-5 As shown, the free end surface of the blocking cantilever contact finger 311 is an arc surface.

[0061] Preferably, the circuit breaker of the present invention further comprises an opening / closing indicator, which cooperates with the opening locking arm 31 of the blocking cantilever 3 to indicate the opening / closing state of the circuit breaker. Further, the opening / closing indicator is pivotally arranged on the side plate assembly 1.

[0062] Preferably, Figure 1-5 As shown, the stop cantilever 3 also includes a fixed mounting arm, and the stop cantilever 3 is arranged on the main shaft 2 through the fixed mounting arm. Figure 1-5 As shown, the opening brake stopping arm 30, the opening brake locking arm 31 and the fixed installation arm form a Y-shaped structure as a whole.

[0063] Preferably, Figure 6 The figure shows an embodiment of the opening half-shaft 6: the opening half-shaft includes a opening half-shaft body 62, a transmission column connecting arm 61 and a opening half-shaft transmission column 60, one end of the transmission column connecting arm 61 is connected to the opening half-shaft body 62, and the other end is connected to the opening half-shaft transmission column 60, and the axis of the opening half-shaft body 62 and the axis of the opening half-shaft transmission column 60 are parallel to each other.

[0064] It should be pointed out that the circuit breaker of the present invention is not limited to including only one set of anti-rebound mechanisms. For example, the circuit breaker of the present invention may include two sets of anti-rebound mechanisms and two blocking cantilevers 3. The two blocking cantilevers 3 are respectively located on both sides of the contact driving arm 2a, and respectively cooperate with the two sets of anti-rebound mechanisms. The anti-rebound parts 4 and connecting rods 5 of each set of anti-rebound mechanisms are respectively located on both sides of a side plate, and the structure of the corresponding opening half-shaft 6 also needs to be adjusted accordingly, that is, a opening half-shaft transmission column 60 is respectively arranged at both ends of the opening half-shaft 6 to respectively cooperate with the connecting rods 5 of the two anti-rebound mechanisms.

[0065] like Figure 7-10 FIG. 2 shows a second embodiment of the circuit breaker of the present invention.

[0066] The circuit breaker of the second embodiment is different from that of the first embodiment in that: the opening half-shaft 6 and the connecting rod 5 do not have driving cooperation, but the overcurrent release directly drives and cooperates with the connecting rod 5 while driving and cooperating with the opening half-shaft 6 through its pressure plate 3a. Figure 7-10 As shown, one end of the pressure plate 3a that is drivingly engaged with the opening half shaft 6 is also drivingly engaged with the connecting rod 5.

[0067] The following will be combined Figure 7-9, the operation process of the circuit breaker of this embodiment is further explained.

[0068] like Figure 7 As shown, the current release is actuated to swing the pressure plate 3a from the reset position to the driving position (swinging from top to bottom), and the pressure plate 3a drives the opening half shaft 6 to overcome the force of the opening half shaft reset spring 9 and rotate from the initial position (the opening half shaft transmission column 60 is located at the upper end of the second limit hole 12) to the action position (the opening half shaft transmission column 60 is located at the lower end of the second limit hole 12), so that the circuit breaker is opened. At the same time, the pressure plate 3a drives the connecting rod 5 to overcome the force of the connecting rod reset spring 8 to rotate (rotate in the counterclockwise direction) and avoid the anti-rebound component 4. The anti-rebound component 4 rotates from the unlocking position to the locking position (rotate in the counterclockwise direction) under the action of the anti-rebound component reset spring 7; as shown Figure 8 As shown, the circuit breaker of the present invention completes opening, the pressure plate 3a keeps the opening half shaft 6 in the action position and the anti-rebound member 4 in the locking position, the stop arm 3 hits the stop shaft 1a and cooperates with the anti-rebound member 4 to prevent the stop arm 3 from rebounding in the closing direction (clockwise); Fig. 9 As shown, after the current release is reset, the pressure plate 3a swings from the driving position to the reset position, and the pressure plate 3 avoids the opening half-shaft 6 and the connecting rod 5. The opening half-shaft 6 rotates from the action position to the initial position under the action of the opening half-shaft reset spring 9. The connecting rod 5 rotates under the action of the connecting rod reset spring 8 and drives the anti-rebound component 4 to overcome the anti-rebound component reset spring 7 and rotate from the locked position to the unlocked position. The anti-rebound component 4 releases the limit cooperation with the blocking cantilever 3, and the circuit breaker can be closed normally later.

[0069] The above contents are further detailed descriptions of the present invention in combination with specific preferred embodiments, and it cannot be determined that the specific implementation of the present invention is limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, several simple deductions or substitutions can be made without departing from the concept of the present invention, which should be regarded as falling within the protection scope of the present invention.

Claims

1. A circuit breaker, comprising a side plate assembly (1), a main shaft (2), a stop shaft (1a), a stop cantilever (3) and a switch-off half shaft (6), wherein the side plate assembly (1) comprises two side plates arranged at a relative interval, the two ends of the main shaft (2) are respectively rotatably matched with the two side plates, the stop cantilever (3) is arranged on the main shaft (2) and rotates synchronously therewith, and the two ends of the stop shaft (1a) are respectively arranged on the two side plates; characterized in that: The circuit breaker further comprises an anti-rebound mechanism, which comprises a pivotally arranged anti-rebound component (4); when the opening half shaft (6) rotates from an initial position to an operating position to open the circuit breaker and the opening half shaft (6) remains in the operating position, the anti-rebound component (4) rotates from an unlocking position to a locking position, and after the blocking cantilever (3) rotates in the opening direction until it hits the blocking shaft (1a), the blocking cantilever (3) and the anti-rebound component (4) are limitedly matched to prevent the blocking cantilever (3) from rebounding in the closing direction, and when the opening half shaft (6) rotates from the operating position to the initial position, the opening half shaft (6) drives the anti-rebound component (4) to rotate from the locking position to the unlocking position, and the anti-rebound component (4) releases the limited matching with the blocking cantilever (3).

2. The circuit breaker according to claim 1, characterized in that: The anti-rebound mechanism also includes a pivotally arranged connecting rod (5), and the brake opening half shaft (6) is driven and matched with the anti-rebound component (4) through the connecting rod (5).

3. The circuit breaker according to claim 2, characterized in that: The opening brake half-shaft (6) comprises an opening brake half-shaft transmission column (60), and the anti-rebound component (4) comprises an anti-rebound component limiting platform (41); when the opening brake half-shaft (6) rotates from the initial position to the action position, the opening brake half-shaft (6) drives the opening brake half-shaft transmission column (60) to swing, and the opening brake half-shaft transmission column (60) drives the connecting rod (5) to rotate, the connecting rod (5) avoids the anti-rebound component (4), and the anti-rebound component (4) rotates from the unlocking position to the locking position; when the opening brake half-shaft (6) rotates from the action position to the initial position, the opening brake half-shaft (6) drives the opening brake half-shaft transmission column (60) to swing, the opening brake half-shaft transmission column (60) avoids the connecting rod (5), the connecting rod (5) rotates and drives the anti-rebound component (4) to rotate from the locking position to the unlocking position through the anti-rebound component limiting platform (41).

4. The circuit breaker according to claim 3, characterized in that: The anti-rebound component (4) and the connecting rod (5) are respectively pivotally arranged on the side plate assembly (1), and the anti-rebound component (4) and the connecting rod (5) are respectively arranged on both sides of the same side plate; the side plate is provided with a first limiting hole (11) and a second limiting hole (12); the anti-rebound component limiting platform (41) is movably inserted in the first limiting hole (11) and passes through the first limiting hole (11) to cooperate with the connecting rod (5); the opening brake half-shaft transmission column (60) is movably inserted in the second limiting hole (12) and passes through the second limiting hole (12) to cooperate with the connecting rod (5).

5. The circuit breaker according to claim 4, characterized in that: When the anti-rebound component (4) is located at the locking position, the anti-rebound component limiting platform (41) abuts against a side wall of one end of the first limiting hole (11).

6. The circuit breaker according to claim 4, characterized in that: One end of the connecting rod (5) is pivotally arranged on the side plate assembly (1), the other end cooperates with the brake half-shaft transmission column (60), and the middle part cooperates with the anti-rebound component limit platform (41).

7. The circuit breaker according to claim 6, characterized in that: The connecting rod (5) comprises a first connecting rod contact surface (50) and a second connecting rod contact surface (51) provided at one end thereof, the first connecting rod contact surface (50) being an arcuate surface, and the second connecting rod contact surface (51) being a plane surface; when the opening brake half-shaft (6) is located at an initial position, the opening brake half-shaft transmission column (60) abuts against the first connecting rod contact surface (50); when the opening brake half-shaft (6) is located at an action position, the opening brake half-shaft transmission column (60) abuts against the second connecting rod contact surface (51).

8. The circuit breaker according to claim 3, characterized in that: The circuit breaker further comprises a trip half-shaft reset spring (9), which applies a force to the trip half-shaft (6) to rotate it from an action position to an initial position; the anti-rebound mechanism further comprises an anti-rebound component reset spring (7) and a connecting rod reset spring (8), which applies a force to the anti-rebound component (4) to rotate it from an unlocked position to a locked position, and the connecting rod reset spring (8) applies a force to the connecting rod (5) to rotate it and drive the anti-rebound component (4) to rotate from a locked position to an unlocked position.

9. The circuit breaker according to claim 1, characterized in that: When the anti-rebound component (4) is in the locked position, after one end of the blocking cantilever (3) hits the blocking shaft (1a), the other end cooperates with the anti-rebound component (4) to prevent the blocking cantilever (3) from rebounding in the closing direction.

10. The circuit breaker according to claim 1 or 9, characterized in that: The stop cantilever (3) comprises a stop cantilever limiting groove (310), the anti-rebound component (4) comprises an anti-rebound component limiting angle (42), and the stop cantilever limiting groove (310) and the anti-rebound component limiting angle (42) cooperate in limiting positions to prevent the stop cantilever (3) from rebounding in the closing direction.

11. The circuit breaker according to claim 10, characterized in that: The blocking cantilever (3) further comprises a blocking cantilever contact finger (311) serving as a side wall of the blocking cantilever limit groove (310); the circuit breaker further comprises an overcurrent release, the overcurrent release actuates to drive the opening half shaft (6) to rotate from an initial position to an actuating position to open the circuit breaker, and when the overcurrent release keeps the opening half shaft (6) in the actuating position, the anti-rebound component (4) rotates from an unlocking position to a locking position, and the blocking cantilever (3) moves in the opening direction. The cantilever arm (310) is rotated to hit the stop shaft (1a), and at the same time, the stop cantilever arm contact finger (311) squeezes the anti-rebound component limit angle (42) and the stop cantilever arm contact finger (311) moves from one side of the anti-rebound component limit angle (42) to the other side thereof, so that the stop cantilever arm limit groove (310) and the anti-rebound component limit angle (42) are relatively matched, and the stop cantilever arm contact finger (311) and the anti-rebound component limit angle (42) are limitedly matched, thereby preventing the stop cantilever (3) from rebounding in the closing direction.

12. The circuit breaker according to claim 11, characterized in that: The blocking cantilever (3) comprises a switch-opening blocking arm (30) and a switch-opening locking arm (31) respectively arranged at two ends thereof, and a blocking cantilever limiting groove (310) and a blocking cantilever contact finger (311) are provided at the free end of the switch-opening locking arm (31).

13. The circuit breaker according to claim 3, characterized in that: The circuit breaker also comprises an overcurrent release, which is actuated and driven by the opening half-shaft transmission column (60) through its pressure plate (3a), driving the opening half-shaft (6) to rotate from an initial position to an actuation position and keeping the opening half-shaft (6) in the actuation position; when the overcurrent release is reset, the opening half-shaft (6) rotates from the actuation position to the initial position.

14. The circuit breaker according to claim 2, characterized in that: The axis of the main shaft (2), the axis of the stop shaft (1a), the axis of the opening half shaft (6), the axis of the rotating shaft of the anti-rebound component (4) and the axis of the rotating shaft of the connecting rod (5) are parallel to each other and perpendicular to the side plate assembly (1); the axis of the main shaft (2), the axis of the stop shaft (1a), the axis of the opening half shaft (6) and the axis of the rotating shaft of the anti-rebound component (4) are located at the four vertices of a quadrilateral.

15. The circuit breaker according to claim 1, characterized in that: The circuit breaker also includes a contact driving arm (2a) arranged on the main shaft (2) and rotating synchronously therewith, and the contact driving arm (2a) is drivingly connected to the moving contact of the circuit breaker.

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