breaker

Abstract

The present invention relates to the field of low-voltage electrical appliances, and in particular to a circuit breaker, which comprises a side plate assembly, a main shaft, a stop shaft, a stop cantilever and a closing half shaft, wherein the side plate assembly comprises two side plates arranged at a relative interval, two ends of the main shaft respectively cooperate with the two side plates for rotation, two ends of the stop shaft are respectively arranged on the two side plates, the stop cantilever is arranged on the main shaft and rotates synchronously therewith, and the closing half shaft rotates to drive the circuit breaker to close; the circuit breaker also comprises an anti-rebound device, and the anti-rebound device comprises a pivotally arranged anti-rebound part; when the circuit breaker is opened, after the stop cantilever rotates in the opening direction and hits the stop shaft, the stop cantilever cooperates with the anti-rebound part in a limiting manner to prevent the stop cantilever from rebounding in the closing direction; when the circuit breaker is closed, the closing half shaft rotates and drives the anti-rebound part to rotate to release the limiting cooperation with the stop cantilever; the circuit breaker of the present invention has good anti-rebound reliability.

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 contact mechanism bounce 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 maximum 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. The existing low-voltage circuit breakers, especially low-voltage universal circuit breakers, use inertia to form interlocking in their anti-rebound structures to prevent the moving contacts from rebounding significantly after opening. This structure has certain unreliability and is prone to failure. Summary of the invention

[0003] The object of the present invention is to overcome the defects of the prior art and provide a circuit breaker with good anti-rebound reliability.

[0004] To achieve the above object, the present invention adopts the following technical solutions:

[0005] A circuit breaker comprises a side plate assembly 1, a main shaft 2, a stop shaft 8, a stop cantilever 3 and a closing half shaft 7, wherein the side plate assembly 1 comprises two side plates arranged at a relative interval, two ends of the main shaft 2 are respectively rotatably matched with the two side plates, two ends of the stop shaft 8 are respectively arranged on the two side plates, the stop cantilever 3 is arranged on the main shaft 2 and rotates synchronously therewith, and the closing half shaft 7 rotates to drive the circuit breaker to close; the circuit breaker also comprises an anti-rebound device, and the anti-rebound device comprises a pivotally arranged anti-rebound part 4; when the circuit breaker is opened, after the stop cantilever 3 rotates in the opening direction and hits the stop shaft 8, the stop cantilever 3 is limitedly matched with the anti-rebound part 4 to prevent the stop cantilever 3 from rebounding in the closing direction; when the circuit breaker is closed, the closing half shaft 7 rotates and drives the anti-rebound part 4 to rotate to release the limited match with the stop cantilever 3.

[0006] Preferably, one end of the anti-rebound component 4 is drivingly matched with the closing half shaft 7 , and the other end is limitingly matched with the blocking cantilever 3 .

[0007] Preferably, the anti-rebound member 4 includes an anti-rebound member actuated arm 41 , the closing half-shaft 7 includes a closing half-shaft driving side wall 71 , and the free end of the anti-rebound member actuated arm 41 abuts against and drives the closing half-shaft driving side wall 71 .

[0008] Preferably, the anti-rebound component 4 includes an anti-rebound component limiting angle 42, and the stopping cantilever 3 includes a stopping cantilever limiting groove 300, and the anti-rebound component limiting angle 42 cooperates with the stopping cantilever limiting groove 300 to prevent the stopping cantilever 3 from rebounding in the closing direction.

[0009] Preferably, the stopping cantilever 3 also includes a stopping cantilever contact finger 301 serving as a side wall of the stopping cantilever limit groove 300. When the circuit breaker is opened, the stopping cantilever contact finger 301 drives the anti-rebound component 4 to rotate and move from one side of the anti-rebound component limit angle 42 to the other side of the anti-rebound component limit angle 42. The anti-rebound component 4 is reset and limitedly cooperates with the stopping cantilever contact finger 301 to prevent the stopping cantilever 3 from rebounding in the closing direction.

[0010] Preferably, the middle portion of the anti-rebound component 4 is pivotally arranged on the side plate assembly 1 ; the anti-rebound device further includes an anti-rebound component reset spring 5 .

[0011] Preferably, the circuit breaker also includes an anti-rebound component limiting structure, and the anti-rebound component reset spring 5 enables the anti-rebound component 4 to cooperate with the anti-rebound component limiting structure and the anti-rebound component 4 to cooperate with the blocking cantilever 3 to prevent the blocking cantilever 3 from rebounding in the closing direction.

[0012] Preferably, the anti-rebound component limiting structure includes an anti-rebound component limiting platform 43 arranged on the anti-rebound component 4 and an anti-rebound component limiting hole 11 arranged on the side panel, the anti-rebound component limiting platform 43 is movably inserted in the anti-rebound component limiting hole 11, and under the action of the anti-rebound component return spring 5, the anti-rebound component limiting platform 43 abuts against the side wall at one end of the anti-rebound component limiting hole 11.

[0013] Preferably, the anti-rebound component 4 is a cross-shaped structure, including relatively arranged anti-rebound component actuated arms 41 and anti-rebound component limiting angles 42, and relatively arranged anti-rebound component pivot mounting portions and anti-rebound component limiting platforms 43; the anti-rebound component 4 is pivotally mounted on the side panel assembly 1 through the anti-rebound component pivot mounting portions, and the anti-rebound component limiting platforms 43 protrude on one side of the anti-rebound component 4.

[0014] Preferably, the anti-rebound device also includes an anti-rebound component reset spring 5, which is a torsion spring, sleeved on the rotating shaft of the anti-rebound component 4, with one end limitedly matched with the anti-rebound component 4 and the other end limitedly matched with the side plate assembly 1.

[0015] Preferably, the axis of the main shaft 2, the axis of the stop shaft 8, the axis of the rotating shaft of the anti-rebound component 4 and the axis of the closing half-shaft 7 are parallel to each other, the axis of the main shaft 2, the axis of the stop shaft 8 and the axis of the closing half-shaft 7 are located at the three vertices of a triangle, and the anti-rebound component 4 is arranged close to the closing half-shaft 7.

[0016] Preferably, the blocking cantilever 3 is located between the main shaft 2 and the blocking shaft 8, and the blocking cantilever 3 is a Y-shaped structure, including a disconnecting blocking arm 31, a disconnecting locking arm 30 and a fixed mounting arm, and the blocking cantilever 3 is arranged on the main shaft 2 through the fixed mounting arm; when the circuit breaker is disconnected, the disconnecting blocking arm 31 is limitedly matched with the blocking shaft 8, and the disconnecting locking arm 30 is limitedly matched with the anti-rebound component 4.

[0017] Preferably, the circuit breaker also includes a contact driving arm 9 arranged on the main shaft 2 and rotating synchronously therewith, and the contact driving arm 9 is connected to the moving contact driving of the circuit breaker; the circuit breaker includes at least two stopping cantilevers 3 and at least two groups of anti-rebound devices, and the two stopping cantilevers 3 are respectively arranged on both sides of the contact driving arm 9, and respectively cooperate with the two groups of anti-rebound devices respectively arranged on both sides of the contact driving arm 9.

[0018] The anti-rebound device of the circuit breaker of the present invention can effectively prevent the movable contact from rebounding when the circuit breaker is opened, and the anti-rebound device is different from the existing method of using inertia to form an interlock, thereby improving the stability and reliability of the anti-rebound device and avoiding or significantly reducing the occurrence of failure of the anti-rebound device.

[0019] In addition, the anti-rebound member limiting structure effectively limits the anti-rebound member 4, preventing the anti-rebound member 4 from being disengaged from the normal position under the reset force of the anti-rebound member reset spring 5, thereby ensuring the stability and reliability of the anti-rebound device. In addition, the layout of the main shaft 2, the stop shaft 8, the anti-rebound member 4 and the closing half shaft 7 makes the layout of the circuit breaker of the present invention more compact, which is conducive to saving installation space. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of the circuit breaker of the present invention, and the circuit breaker is in an open state;

[0021] Figure 2 It is a schematic diagram of the structure of the circuit breaker of the present invention, and the circuit breaker starts to close;

[0022] Figure 3 It is a schematic diagram of the structure of the circuit breaker of the present invention, and the circuit breaker is in a closed state;

[0023] Figure 4 It is a schematic diagram of the structure of the circuit breaker of the present invention. When the circuit breaker starts to open, the cantilever arm hits the anti-rebound part;

[0024] Figure 5 It is a schematic diagram of the structure of the circuit breaker of the present invention. After the circuit breaker is opened, the blocking cantilever rebounds slightly and is blocked by the anti-rebound component;

[0025] Figure 6 It is a three-dimensional structural schematic diagram of the circuit breaker of the present invention. DETAILED DESCRIPTION

[0026] The following is combined with Figure 1-6 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.

[0027] The circuit breaker of the present invention comprises a side plate assembly 1, a main shaft 2, a stop shaft 8, a stop cantilever 3 and a closing half shaft 7. The side plate assembly 1 comprises two side plates arranged at a relative interval, two ends of the main shaft 2 are respectively rotatably matched with the two side plates, two ends of the stop shaft 8 are respectively arranged on the two side plates, the stop cantilever 3 is arranged on the main shaft 2 and rotates synchronously therewith, and the closing half shaft 7 rotates to drive the circuit breaker to close; the circuit breaker also comprises an anti-rebound device, and the anti-rebound device comprises a pivotally arranged anti-rebound part 4; when the circuit breaker is opened, the stop cantilever 3 rotates in the opening direction and hits the stop shaft 8, and the stop cantilever 3 is limitedly matched with the anti-rebound part 4 to prevent the stop cantilever 3 from rebounding in the closing direction; when the circuit breaker is closed, the closing half shaft 7 rotates and drives the anti-rebound part 4 to rotate to release the limited cooperation with the stop cantilever 3.

[0028] The anti-rebound device of the circuit breaker of the present invention can effectively prevent the movable contact from rebounding when the circuit breaker is opened, and the anti-rebound device is different from the existing method of using inertia to form an interlock, thereby improving the stability and reliability of the anti-rebound device and avoiding or significantly reducing the occurrence of failure of the anti-rebound device.

[0029] It should be pointed out that the “rebound of the stopping arm 3 in the closing direction” refers to the rotation of the stopping arm 3 in the closing direction due to the collision of the stopping shaft 8 with the rapid rotation in the opening direction.

[0030] Preferably, Figure 1-6 As shown, the anti-rebound member 4 includes an anti-rebound member limiting angle 42, and the stop arm 3 includes a stop arm limiting groove 300. The anti-rebound member limiting angle 42 cooperates with the stop arm limiting groove 300 to prevent the stop arm 3 from rebounding in the closing direction. Figure 1-6 As shown, the stopping cantilever 3 also includes a stopping cantilever contact finger 301 serving as a side wall of the stopping cantilever limit groove 300. When the circuit breaker is opened, the stopping cantilever contact finger 301 drives the anti-rebound component 4 to rotate and move from one side of the anti-rebound component limit angle 42 to the other side of the anti-rebound component limit angle 42, and the anti-rebound component 4 is reset and limited with the stopping cantilever contact finger 301 to prevent the stopping cantilever 3 from rebounding in the closing direction.

[0031] Preferably, Figure 1-6 As shown, the circuit breaker of the present invention also includes an anti-rebound member limiting structure, and the anti-rebound member reset spring 5 makes the anti-rebound member 4 and the anti-rebound member limiting structure limit cooperation, and the anti-rebound member 4 and the stop cantilever 3 limit cooperation, preventing the stop cantilever 3 from rebounding in the closing direction. Figure 1-6As shown, the anti-rebound member limiting structure includes an anti-rebound member limiting platform 43 provided on the anti-rebound member 4 and an anti-rebound member limiting hole 11 provided on the side plate, the anti-rebound member limiting platform 43 is movably inserted in the anti-rebound member limiting hole 11, and under the action of the anti-rebound member reset spring 5, the anti-rebound member limiting platform 43 abuts against the side wall at one end of the anti-rebound member limiting hole 11. The anti-rebound member limiting structure effectively limits the anti-rebound member 4, preventing the anti-rebound member 4 from being separated from the normal position under the reset action of the anti-rebound member reset spring 5, thereby ensuring the stability and reliability of the anti-rebound device.

[0032] Preferably, Figure 1-5 As shown, the axis of the main shaft 2, the axis of the stop shaft 8, the axis of the rotating shaft of the anti-rebound member 4 and the axis of the closing half shaft 7 are parallel to each other, the axis of the main shaft 2, the axis of the stop shaft 8 and the axis of the closing half shaft 7 are located at the three vertices of a triangle, and the anti-rebound member 4 is arranged close to the closing half shaft 7. The layout of the main shaft 2, the stop shaft 8, the anti-rebound member 4 and the closing half shaft 7 makes the layout of the circuit breaker of the present invention more compact, which is conducive to saving installation space.

[0033] like Figure 1-6 FIG. 1 is an embodiment of a 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 8, a stop cantilever 3 and a closing half shaft 7. The side plate assembly 1 comprises two side plates arranged at a relative interval, two ends of the main shaft 2 are respectively rotatably matched with the two side plates, two ends of the stop shaft 8 are respectively arranged on the two side plates, the stop cantilever 3 is arranged on the main shaft 2 and rotates synchronously therewith, and the closing half shaft 7 rotates to trigger the energy storage operating mechanism to release energy and drive the main shaft 2 to rotate to realize the closing of the circuit breaker; the circuit breaker also comprises an anti-rebound device, and the anti-rebound device comprises a pivotally arranged anti-rebound part 4; when the circuit breaker is opened, the stop cantilever 3 rotates in the opening direction and hits the stop shaft 8, and the stop cantilever 3 is limitedly matched with the anti-rebound part 4 to prevent the stop cantilever 3 from rebounding in the closing direction; when the circuit breaker is closed, the closing half shaft 7 rotates and drives the anti-rebound part 4 to rotate to release the limited cooperation with the stop cantilever 3.

[0035] It should be pointed out that the circuit breaker of the present invention is preferably a circuit breaker with an energy storage operating mechanism, and the side plate assembly 1, the main shaft 2, the stop shaft 8, the stop cantilever 3 and the closing half shaft 7 are all inherent parts of the energy storage operating mechanism. The rotation of the main shaft 2 is used to drive the moving contact to cooperate with the static contact to realize the opening and closing of the circuit breaker. After the energy storage operating mechanism stores energy, the closing half shaft 7 is triggered by the closing button to rotate so that the energy storage operating mechanism releases energy to drive the main shaft 2 to rotate, drive the moving contact to contact with the static contact, and realize the closing of the circuit breaker. This is the prior art in this field and will not be repeated.

[0036] Preferably, Figure 1-5As shown, one end of the anti-rebound component 4 is drivingly matched with the closing half shaft 7, and the other end is limitingly matched with the blocking cantilever 3.

[0037] Preferably, Figure 1-6 As shown, the anti-rebound member 4 includes an anti-rebound member limiting angle 42, and the stop arm 3 includes a stop arm limiting groove 300. The anti-rebound member limiting angle 42 cooperates with the stop arm limiting groove 300 to prevent the stop arm 3 from rebounding in the closing direction. Figure 1-6 As shown, the blocking cantilever 3 also includes a blocking cantilever contact finger 301 as a side wall of the blocking cantilever limit groove 300. When the circuit breaker is opened, the blocking cantilever contact finger 301 drives the anti-rebound component 4 to rotate from one side of the anti-rebound component limit angle 42 and moves to the other side of the anti-rebound component limit angle 42. The anti-rebound component 4 is reset and cooperates with the blocking cantilever contact finger 301 to prevent the blocking cantilever 3 from rebounding in the closing direction. It should be pointed out that the blocking cantilever 3 may not be provided with the blocking cantilever limit groove 300, but only the blocking cantilever contact finger 301 and the anti-rebound component limit angle 42 are used.

[0038] Specifically, Figure 4 As shown (combined Figure 3 ), when the circuit breaker is opened, the blocking arm 3 rotates counterclockwise (opening direction), the lower end of the blocking arm 3 hits the blocking shaft 8, and at the same time, the blocking arm contact finger 301 at the upper end of the blocking arm 3 hits the anti-rebound component limit angle 42 to make the anti-rebound component 4 rotate counterclockwise, and the blocking arm contact finger 301 moves from the lower side of the anti-rebound component limit angle 42 to the upper side thereof, so that the blocking arm limit groove 300 is opposite to the anti-rebound component limit angle 42, as shown in FIG. Figure 5 As shown, when the stop arm 3 quickly hits the stop shaft 8 to make it rebound, the stop arm contact finger 301 will cooperate with the anti-rebound component limit angle 42 to prevent the stop arm 3 from rebounding in the clockwise direction (closing direction). When the stop arm 3 finally stabilizes in the opening position, the circuit breaker is opened and enters the Figure 1 Status shown.

[0039] Preferably, Figure 1-5 As shown, the side wall of the anti-rebounding member limiting angle 42 that cooperates with the cantilever contact finger 301 is an arc-shaped side wall. Of course, the side wall of the anti-rebounding member limiting angle 42 that cooperates with the cantilever contact finger 301 can also be a plane wall, a polygonal curved wall, etc.

[0040] Preferably, Figure 1-6 As shown, the anti-rebound device also includes an anti-rebound component reset spring 5, which is a torsion spring, sleeved on the rotating shaft of the anti-rebound component 4, with one end limitedly matched with the anti-rebound component 4 and the other end limitedly matched with the side plate assembly 1.

[0041] Preferably, Figure 1-6As shown, the anti-rebound member 4 includes an anti-rebound member actuated arm 41, the closing half shaft 7 includes a closing half shaft driving side wall 71, and the free end of the anti-rebound member actuated arm 41 abuts against and drives the closing half shaft driving side wall 71. Figure 1 As shown, the circuit breaker of the present invention is in the open state, the anti-rebound member limit angle 42 is matched with the stop cantilever limit groove 300, and the free end of the anti-rebound member driven arm 41 is in contact with the closing half-shaft driving side wall 71; Figure 2 As shown, when the circuit breaker of the present invention is closed, the closing half shaft 7 rotates, and the closing half shaft drives the side wall 71 to squeeze the anti-rebound member actuated arm 41, so that the anti-rebound member 4 rotates to avoid the stop cantilever contact finger 301, and the stop cantilever 3 is released and rotates to close the circuit breaker, and enters Figure 3 Status shown.

[0042] Preferably, Figure 6 As shown, the closing half-shaft 7 includes a closing half-shaft first driving part, and a closing half-shaft driving side wall 71 and a closing half-shaft driving rod 70 are provided on the circumference of the closing half-shaft first driving part; the side plate is provided with a driving rod limiting hole 12, and the closing half-shaft driving rod 70 is movably inserted in the driving rod limiting hole 12.

[0043] Preferably, Figure 6 As shown, the circuit breaker of the present invention further includes a closing half-shaft reset spring 6, which is a torsion spring, and is arranged on the side plate assembly 1 through a first spring axis, with one end being limitedly matched with the side plate assembly, and the other end being limitedly matched with the closing half-shaft 7. Further, as Figure 6 As shown, a spring limiting groove is provided in the middle of the closing half-shaft driving side wall 71, and one end of the closing half-shaft reset spring 6 is arranged in the spring limiting groove.

[0044] Specifically, Figure 1-6 In the direction shown, when the circuit breaker of the present invention is closed, the closing half-shaft 7 overcomes the force of the closing half-shaft reset spring 6 and rotates counterclockwise, and the closing half-shaft drives the side wall 71 and the anti-rebound member receiving arm 41 to cooperate to drive the anti-rebound member 4 to overcome the force of the anti-rebound member reset spring 5 and rotate counterclockwise to avoid the stop cantilever contact finger 301 of the stop cantilever 3.

[0045] Preferably, Figure 1-6 As shown, the circuit breaker of the present invention also includes an anti-rebound member limiting structure, and the anti-rebound member reset spring 5 makes the anti-rebound member 4 and the anti-rebound member limiting structure limit cooperation, and the anti-rebound member 4 and the stop cantilever 3 limit cooperation, preventing the stop cantilever 3 from rebounding in the closing direction. Figure 1-6As shown, the anti-rebound member limiting structure includes an anti-rebound member limiting platform 43 provided on the anti-rebound member 4 and an anti-rebound member limiting hole 11 provided on the side plate, the anti-rebound member limiting platform 43 is movably inserted in the anti-rebound member limiting hole 11, and under the action of the anti-rebound member reset spring 5, the anti-rebound member limiting platform 43 abuts against the side wall at one end of the anti-rebound member limiting hole 11. It should be pointed out that the anti-rebound member limiting structure is not limited to the above-mentioned method, and can also be implemented by using a positioning rib or a positioning pin in cooperation with the anti-rebound member 4.

[0046] Specifically, Figure 1-5 In the direction shown, the anti-rebound component reset spring 5 applies a force to the anti-rebound component 4 to rotate it in the counterclockwise direction. When the anti-rebound component 4 is in the initial position, under the action of the anti-rebound component reset spring 5, the anti-rebound component 4 always abuts against the left end side wall of the anti-rebound component limiting hole 11.

[0047] Preferably, Figure 6 As shown, an embodiment of the anti-rebound member 4 is shown: the anti-rebound member 4 is a cross-shaped structure, including an anti-rebound member actuated arm 41 and an anti-rebound member limiting angle 42 arranged opposite to each other, and an anti-rebound member pivoting mounting portion and an anti-rebound member limiting platform 43 arranged opposite to each other; the anti-rebound member 4 is pivotally mounted on the side plate assembly 1 through the anti-rebound member pivoting mounting portion, and the anti-rebound member limiting platform 43 protrudes on one side of the anti-rebound member 4. Furthermore, the side wall of the anti-rebound member limiting angle 42 that is limitedly matched with the stop cantilever contact finger 301 is an arc-shaped side wall.

[0048] Preferably, Figure 6 As shown in FIG. 1 , an embodiment of the blocking arm 3 is shown: the blocking arm 3 is a Y-shaped structure, including a switch-off blocking arm 31, a switch-off locking arm 30 and a fixed mounting arm, and the blocking arm 3 is arranged on the main shaft 2 through the fixed mounting arm; when the circuit breaker is opened, the switch-off blocking arm 31 is limitedly matched with the blocking shaft 8, and the switch-off locking arm 30 is limitedly matched with the anti-rebound component 4. Further, as Figure 1-6 As shown, the free end of the opening lock arm 30 is provided with a stop cantilever limit groove 300 and a stop cantilever contact finger 301 as a side wall of the stop cantilever limit groove 300. The stop cantilever limit groove 300 is a right angle groove, and the free end surface of the stop cantilever contact finger 301 is an arc surface. Further, the circuit breaker of the present invention also includes an opening and closing indicator, which cooperates with the opening lock arm 30 to indicate the opening / closing state of the circuit breaker.

[0049] Preferably, Figure 1-5 As shown, the axis of the main shaft 2, the axis of the stop shaft 8, the axis of the rotating shaft of the anti-rebound member 4 and the axis of the closing half shaft 7 are parallel to each other, the axis of the main shaft 2, the axis of the stop shaft 8 and the axis of the closing half shaft 7 are located at the three vertices of a triangle, and the anti-rebound member 4 is arranged close to the closing half shaft 7. Further, as Figure 1-5 As shown, the side plate assembly 1 includes an assembly space located between two side plates, the main shaft 2 and the stop shaft 8 are located at one end of the assembly space, and the anti-rebound member 4 and the closing half shaft 7 are located at the other end of the assembly space.

[0050] Specifically, Figure 1-5 In the direction shown, the main shaft 2 and the stop shaft 8 are arranged at an interval up and down at the left end of the assembly space, the closing half shaft 7 and the anti-rebound component 4 are arranged at an interval up and down at the right end of the assembly space, and the anti-rebound component 4 is offset relative to the closing half shaft 7 in the direction of the stop shaft 8.

[0051] like Figure 1-5 As shown, the circuit breaker of the present invention further includes a contact driving arm 9 arranged on the main shaft 2 and rotating synchronously therewith, and the contact driving arm 9 is drivingly connected to the moving contact of the circuit breaker. Figure 1-6 As shown, the circuit breaker of the present invention includes at least two stop cantilevers 3 and at least two groups of anti-rebound devices, and the two stop cantilevers 3 are respectively arranged on both sides of the contact driving arm 9, and respectively cooperate with the two groups of anti-rebound devices respectively arranged on both sides of the contact driving arm 9. The two groups of stop cantilevers 3 and anti-rebound devices are respectively arranged on both sides of the contact driving arm 9, which is beneficial to improving the reliability and stability of the anti-rebound function of the circuit breaker of the present invention, and avoiding or significantly reducing the occurrence of failure. Of course, the circuit breaker of the present invention can also be provided with only one stop cantilever 3 and a group of anti-rebound devices cooperating with the stop cantilever 3; or, the number of the stop cantilevers 3 of the circuit breaker of the present invention is greater than 2 and the number of groups of anti-rebound devices is greater than 2.

[0052] 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 (8), a stop cantilever (3) and a closing half shaft (7), wherein the side plate assembly (1) comprises two side plates arranged at a relative interval, two ends of the main shaft (2) are respectively rotatably matched with the two side plates, two ends of the stop shaft (8) are respectively arranged on the two side plates, the stop cantilever (3) is arranged on the main shaft (2) and rotates synchronously therewith, and the closing half shaft (7) rotates to drive the circuit breaker to close; characterized in that: The circuit breaker further comprises an anti-rebound device, which comprises a pivotally arranged anti-rebound component (4); when the circuit breaker is opened, after the blocking cantilever (3) rotates in the opening direction and hits the blocking shaft (8), 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; when the circuit breaker is closed, the closing half shaft (7) rotates and drives the anti-rebound component (4) to rotate to release the limited match with the blocking cantilever (3).

2. The circuit breaker according to claim 1, characterized in that: One end of the anti-rebound component (4) is drivingly matched with the closing half shaft (7), and the other end is limitingly matched with the blocking cantilever (3).

3. The circuit breaker according to claim 2, characterized in that: The anti-rebound component (4) comprises an anti-rebound component actuated arm (41), the closing half shaft (7) comprises a closing half shaft driving side wall (71), and the free end of the anti-rebound component actuated arm (41) abuts against and drives the closing half shaft driving side wall (71).

4. The circuit breaker according to claim 2, characterized in that: The anti-rebound component (4) comprises an anti-rebound component limiting angle (42), the blocking cantilever (3) comprises a blocking cantilever limiting groove (300), and the anti-rebound component limiting angle (42) cooperates with the blocking cantilever limiting groove (300) to prevent the blocking cantilever (3) from rebounding in the closing direction.

5. The circuit breaker according to claim 4, characterized in that: The stopping cantilever (3) further comprises a stopping cantilever contact finger (301) serving as a side wall of the stopping cantilever limit groove (300); when the circuit breaker is opened, the stopping cantilever contact finger (301) drives the anti-rebound component (4) to rotate and move from one side of the anti-rebound component limit angle (42) to the other side of the anti-rebound component limit angle (42); the anti-rebound component (4) is reset and limitedly cooperates with the stopping cantilever contact finger (301) to prevent the stopping cantilever (3) from rebounding in the closing direction.

6. The circuit breaker according to any one of claims 1 to 5, characterized in that: The middle part of the anti-rebound component (4) is pivotally arranged on the side plate assembly (1); the anti-rebound device also includes an anti-rebound component reset spring (5).

7. The circuit breaker according to claim 6, characterized in that: The circuit breaker also includes an anti-rebound component limiting structure, and an anti-rebound component reset spring (5) enables the anti-rebound component (4) to be limitedly matched with the anti-rebound component limiting structure, and the anti-rebound component (4) to be limitedly matched with the blocking cantilever (3), thereby preventing the blocking cantilever (3) from rebounding in the closing direction.

8. The circuit breaker according to claim 7, characterized in that: The anti-rebound component limiting structure comprises an anti-rebound component limiting platform (43) arranged on the anti-rebound component (4) and an anti-rebound component limiting hole (11) arranged on the side plate; the anti-rebound component limiting platform (43) is movably inserted into the anti-rebound component limiting hole (11); under the action of the anti-rebound component reset spring (5), the anti-rebound component limiting platform (43) abuts against the side wall at one end of the anti-rebound component limiting hole (11).

9. The circuit breaker according to claim 1, characterized in that: The anti-rebound component (4) is a cross-shaped structure, comprising an anti-rebound component actuated arm (41) and an anti-rebound component limiting angle (42) arranged opposite to each other, and an anti-rebound component pivot mounting portion and an anti-rebound component limiting platform (43) arranged opposite to each other; the anti-rebound component (4) is pivotally mounted on the side plate assembly (1) via the anti-rebound component pivot mounting portion, and the anti-rebound component limiting platform (43) protrudes from one side of the anti-rebound component (4).

10. The circuit breaker according to claim 9, characterized in that: The anti-rebound device also includes an anti-rebound component reset spring (5), which is a torsion spring and is sleeved on the rotating shaft of the anti-rebound component (4), with one end being limitedly matched with the anti-rebound component (4) and the other end being limitedly matched with the side plate assembly (1).

11. The circuit breaker according to claim 1, characterized in that: The axis of the main shaft (2), the axis of the stop shaft (8), the axis of the rotating shaft of the anti-rebound component (4) and the axis of the closing half shaft (7) are parallel to each other; the axis of the main shaft (2), the axis of the stop shaft (8) and the axis of the closing half shaft (7) are located at the three vertices of a triangle; and the anti-rebound component (4) is arranged close to the closing half shaft (7).

12. The circuit breaker according to claim 11, characterized in that: The blocking cantilever (3) is located between the main shaft (2) and the blocking shaft (8); the blocking cantilever (3) is a Y-shaped structure, comprising a switch-off blocking arm (31), a switch-off locking arm (30) and a fixed mounting arm; the blocking cantilever (3) is arranged on the main shaft (2) via the fixed mounting arm; when the circuit breaker is opened, the switch-off blocking arm (31) is limitedly matched with the blocking shaft (8), and the switch-off locking arm (30) is limitedly matched with the anti-rebound component (4).

13. The circuit breaker according to claim 1, characterized in that: The circuit breaker further comprises a contact driving arm (9) arranged on the main shaft (2) and rotating synchronously therewith, the contact driving arm (9) being drivingly connected to the moving contact of the circuit breaker; the circuit breaker comprises at least two blocking cantilevers (3) and at least two groups of anti-rebound devices, the two blocking cantilevers (3) being respectively arranged on both sides of the contact driving arm (9) and respectively cooperating with the two groups of anti-rebound devices respectively arranged on both sides of the contact driving arm (9).

Images