A circuit breaker

Abstract

The utility model provides a circuit breaker, include: circuit breaker casing, be equipped with arc extinguishing chamber in circuit breaker casing, set up incoming line subassembly in one side of arc extinguishing chamber, set up electrically conducting clamp in the other side of arc extinguishing chamber, electrically conducting clamp connects outgoing line subassembly, set up main circuit on-off subassembly outside circuit breaker casing, and main circuit on-off subassembly includes energy storage operation shaft, output crooked arm, switch operation shaft, main shaft, energy storage spring, motor, set up gear assembly between energy storage operation shaft and energy storage spring, make energy storage spring stretch complete mechanism energy storage through the rotation energy storage operation shaft, set up gyro wheel subassembly between switch operation shaft and output crooked arm, drive output crooked arm rotation through the rotation switch operation shaft, set up mechanism cover outside circuit breaker casing, set up switch indication shaft, energy storage indication shaft on mechanism cover. The utility model eliminates the slight air leakage phenomenon of combined structure, and its slight material elasticity can guarantee that each operation shaft, indication shaft and fixed flange are not jammed, and meet the life test requirement.

Description

Technical Field

[0001] This utility model belongs to the field of circuit breaker technology, specifically relating to a circuit breaker with high requirements for coaxiality and airtightness. Background Technology

[0002] Vacuum circuit breakers have been widely developed and have achieved a dominant position in the power distribution field. Currently, most mainstream vacuum circuit breakers adopt spring energy storage operating mechanisms. The opening and closing operating shafts, energy storage operating shafts, energy storage indicating shafts, and opening and closing indicating shafts on the operating mechanism need to be fixed to the housing via flanges. During the operation and rotation of each operating shaft and indicating shaft, there must be no jamming or air leakage between the shafts and the fixed flanges. Therefore, the fixed flanges and each operating shaft and indicating shaft require high coaxiality and airtightness. To meet the life test requirements, the mutual movement of components also requires good lubrication or a low coefficient of friction. Currently, to meet the above process requirements, the fixed flange generally adopts a combination structure of copper sleeve and steel flange. Due to the influence of the manufacturing process, the copper sleeve and steel flange are prone to slight air leakage. Summary of the Invention

[0003] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a circuit breaker by replacing the fixed flange used to connect the circuit breaker spring operating mechanism to the housing with an integrated structure. This structure is made of polytetrafluoroethylene (PTFE), which has certain strength, low elasticity, good self-lubrication, high temperature resistance, low temperature resistance, corrosion resistance, oxidation resistance, and weather resistance. The fixed flange made of this material eliminates the slight air leakage phenomenon of the combined structure. Its slight material elasticity ensures that there is no jamming or sticking between the operating shafts, indicator shafts and the fixed flange. Its good self-lubrication ensures a low coefficient of friction during the mutual movement of the shafts and the fixed flange, meeting the requirements of the life test.

[0004] To achieve the above technical objectives, the technical solution adopted by this utility model is as follows: A circuit breaker includes: a circuit breaker housing, an insulating box inside the circuit breaker housing, an arc-extinguishing chamber inside the insulating box, an inlet assembly on one side of the arc-extinguishing chamber, and a conductive clamp on the other side of the arc-extinguishing chamber, the conductive clamp being connected to an outlet assembly; A main circuit switching assembly is installed outside the circuit breaker housing. This assembly includes an energy storage operating shaft, an output crank arm, a switching operating shaft, a main shaft, an energy storage spring, and a motor. A mechanism crank arm and a phase crank arm are mounted on the main shaft. The mechanism crank arm is connected to the output crank arm, and the phase crank arm is connected to the switching crank arm. The switching crank arm is connected to a guide rod, which is mounted on the arc-extinguishing chamber. A gear assembly is installed between the energy storage operating shaft and the energy storage spring. Rotating the energy storage operating shaft stretches the energy storage spring, completing the mechanism's energy storage. A second gear is installed between the switching operating shaft and the output crank arm. Rotating the switching operating shaft drives the output crank arm to rotate. The circuit breaker housing is provided with a mechanism cover, and the mechanism cover is provided with an opening / closing indicator shaft and an energy storage indicator shaft.

[0005] Preferably, in the circuit breaker, the incoming line assembly includes an incoming line connector, an incoming line conductive rod, and an incoming line bushing. One end of the arc-extinguishing chamber is connected to the incoming line connector, the incoming line connector is connected to the incoming line conductive rod, the incoming line bushing is disposed on the outer side wall of the circuit breaker housing, and the end of the incoming line conductive rod away from the incoming line connector extends out of the circuit breaker housing and into the incoming line bushing.

[0006] Preferably, in the circuit breaker, the outgoing line assembly includes an outgoing line connector, an outgoing line sleeve, and an outgoing line conductive rod. One end of the conductive clamp is connected to the outgoing line connector via a flexible connection. The outgoing line connector is connected to the outgoing line conductive rod. The outgoing line sleeve is disposed on the outer wall of the circuit breaker housing. One end of the outgoing line conductive rod away from the outgoing line connector extends out of the circuit breaker housing and into the outgoing line sleeve.

[0007] Preferably, in the circuit breaker, the mechanism crank arm is connected to the output crank arm via a connecting rod, the phase crank arm is connected to the insulating pull rod via a first pin, the insulating pull rod is equipped with an adjusting screw, the adjusting screw is connected to the opening and closing crank arm via a second pin, and the opening and closing crank arm is connected to the guide rod via a third pin.

[0008] Preferably, in the circuit breaker, the energy storage operating shaft is provided with an energy storage handle, and the energy storage operating shaft is rotated by the energy storage handle to stretch the energy storage spring and complete the energy storage mechanism; the opening and closing operating shaft is provided with an opening and closing handle, and the opening and closing operating shaft is rotated by the opening and closing handle to drive the output crank arm to rotate.

[0009] Preferably, in the circuit breaker, one end of the open / close indicator shaft passes through the mechanism cover and is connected to the main shaft, and a connecting plate is provided on the side wall of the energy storage indicator shaft, with one side of the connecting plate in contact with the energy storage spring.

[0010] Preferably, in the circuit breaker, the opening / closing indicator shaft, the energy storage indicator shaft, the energy storage operation shaft, and the opening / closing operation shaft are all fixed to the mechanism cover by a fixed flange, and the fixed flange is made of polytetrafluoroethylene.

[0011] Preferably, in the circuit breaker, the gear assembly includes a first crank arm, a second crank arm, a first gear, a first gear shaft, a second gear, a third crank arm on the second gear shaft, and a spring mounting shaft. The base plate is provided with an energy storage operating shaft, a first gear shaft, a second gear shaft, and a spring mounting shaft. The energy storage operating shaft is provided with a first crank arm, the first gear shaft is provided with a second crank arm and a first gear, the second gear shaft is provided with a second gear and a second crank arm, and an energy storage spring is sleeved on the spring mounting shaft. The first crank arm and the second crank arm are connected by bolts, the first gear and the second gear mesh, and the spring mounting shaft is connected to the third crank arm by bolts.

[0012] Preferably, in the circuit breaker, the roller assembly includes a closing half-shaft, a first closing stop shaft, an output crank arm shaft, a opening electromagnet, and a opening half-shaft mounted on the base plate. The opening / closing operation shaft is equipped with an opening lever and a closing lever. A bent plate is mounted on the closing half-shaft. A closing stop is mounted on the first closing stop shaft. A wheel and a cam are mounted on the second gear shaft. A fourth pin is mounted on the wheel. The output crank arm includes an output crank arm shaft, a fourth crank arm, a fifth crank arm, a sixth crank arm, a roller, and a roller. The fourth, fifth, and sixth crank arms are sequentially mounted on the output crank arm shaft from the distance from the base plate to the distance from the base plate. A roller is positioned between the fourth and fifth crank arms. A roller is provided between the fifth and sixth crank arms. A push rod is provided on the trip electromagnet. A trip latch plate is provided on the trip half shaft. The trip latch plate is located above the push rod. A first trip latch is provided on the trip latch shaft. A second trip latch is provided on one side of the first trip latch. The first and second trip latches are connected by a connecting pin. A convex arc surface is provided below the first trip latch, and a concave arc surface is provided above the second trip latch.

[0013] Preferably, in the circuit breaker, a second tripping switch shaft is provided on the base plate, a first tripping switch is provided on the tripping switch shaft, a second tripping switch is provided on one side of the first tripping switch, the first tripping switch and the second tripping switch are connected by a connecting pin, a convex arc surface is provided below the first tripping switch, and a concave arc surface is provided above the second tripping switch.

[0014] The beneficial effects of this utility model are: The circuit breaker of this utility model has a fixed flange made of polytetrafluoroethylene (PTFE). PTFE has certain strength characteristics, which can meet the strength requirements as a support component; it has appropriate elasticity, which allows for a small eccentricity of the operating shaft during rotation; it has good self-lubricating properties and a low coefficient of friction with stainless steel; it has excellent high temperature resistance, low temperature resistance, acid and alkali resistance, weather resistance, and oxidation resistance, making it suitable for outdoor product applications.

[0015] The circuit breaker of this utility model adopts an integrated structure for the fixed flange, which eliminates the slight air leakage phenomenon of the combined structure. Its slight material elasticity can ensure that there is no jamming between each operating shaft, indicator shaft and fixed flange. Its good self-lubricating property can ensure a small coefficient of friction during the mutual movement of each shaft and fixed flange, which meets the life test requirements. Attached Figure Description

[0016] Figure 1 This is a cross-sectional view of the main circuit of the circuit breaker of this utility model.

[0017] Figure 2 This is the main view of the circuit breaker drive of this utility model.

[0018] Figure 3 This is a cross-sectional view of the circuit breaker drive of this utility model.

[0019] Figure 4 This is a diagram showing the operation and indication positions of the circuit breaker according to this utility model.

[0020] Figure 5 This is a sectional view of the fixed flange of this utility model.

[0021] Figure 6 This is a cross-sectional view of the gear assembly of this utility model.

[0022] Figure 7 This is a partial cross-sectional view of the roller assembly of this utility model.

[0023] Figure 8 This is another sectional view of the roller assembly of this utility model.

[0024] Figure 9 This is a top view of the roller assembly of this utility model. Detailed Implementation

[0025] In the description of this utility model, it should be understood that the orientation or positional relationship indicated by directional terms such as "inner" and "outer", "upper" and "lower", "front" and "back" is usually based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing this utility model and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the scope of protection of this utility model.

[0026] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this utility model and are not intended to limit this utility model.

[0027] like Figures 1-5A circuit breaker includes: a circuit breaker housing 9, an insulating box 7 inside the circuit breaker housing 9, an arc-extinguishing chamber 6 inside the insulating box 7, an inlet assembly on one side of the arc-extinguishing chamber 6, and a conductive clip 5 on the other side of the arc-extinguishing chamber 6, the conductive clip 5 being connected to an outlet assembly. A main circuit switching assembly is installed outside the circuit breaker housing 9. The main circuit switching assembly includes an energy storage operating shaft 13, an output crank arm 14, a switching operating shaft 18, a main shaft 17, an energy storage spring 20, and a motor 21. A mechanism crank arm 16 and a phase crank arm 22 are installed on the main shaft 17. The mechanism crank arm 16 is connected to the output crank arm 14, and the phase crank arm 22 is connected to a switching crank arm 27. The switching crank arm 27 is connected to a guide rod 29, and the guide rod 29 is installed on the arc-extinguishing chamber 6. A gear assembly is installed between the energy storage operating shaft 13 and the energy storage spring 20. Rotating the energy storage operating shaft 13 stretches the energy storage spring 20 to complete the mechanism energy storage. A second gear is installed between the switching operating shaft 18 and the output crank arm 14. Rotating the switching operating shaft 18 drives the output crank arm 14 to rotate. The circuit breaker housing 9 is provided with a mechanism cover 30. The mechanism cover 30 is provided with an opening / closing indicator shaft 31 and an energy storage indicator shaft 32. One end of the energy storage indicator shaft 32 passes through the mechanism cover 30 and is connected to the base plate 50.

[0028] The incoming line assembly includes an incoming line connector 8, an incoming line conductive rod 10, and an incoming line sleeve 11. One end of the arc-extinguishing chamber 6 is connected to the incoming line connector 8, the incoming line connector 8 is connected to the incoming line conductive rod 10, and the incoming line sleeve 11 is disposed on the outer side wall of the circuit breaker housing 9. The end of the incoming line conductive rod 10 away from the incoming line connector 8 extends out of the circuit breaker housing 9 and into the incoming line sleeve 11.

[0029] The outgoing assembly includes an outgoing connector 3, an outgoing sleeve 1, and an outgoing conductive rod 2. One end of the conductive clamp 5 is connected to the outgoing connector 3 via a flexible connection 4. The outgoing connector 3 is connected to the outgoing conductive rod 2. The outgoing sleeve 1 is disposed on the outer wall of the circuit breaker housing 9. The end of the outgoing conductive rod 2 away from the outgoing connector 3 extends out of the circuit breaker housing 9 and into the outgoing sleeve 1.

[0030] The mechanism crank arm 16 is connected to the output crank arm 14 via a connecting rod 15. The phase crank arm 22 is connected to the insulating pull rod 24 via a first pin 23. An adjusting screw 25 is mounted on the insulating pull rod 24. The adjusting screw 25 is connected to the split crank arm 27 via a second pin 26. The split crank arm 27 is connected to the guide rod 29 via a third pin 28.

[0031] The energy storage operation shaft 13 is equipped with an energy storage handle 12. Rotating the energy storage operation shaft 13 via the energy storage handle 12 stretches the energy storage spring 20 to complete the energy storage of the mechanism. The split operation shaft 18 is equipped with a split handle 19. Rotating the split operation shaft 18 via the split handle 19 drives the output crank arm 3 to rotate.

[0032] One end of the split-open indicator shaft 31 passes through the mechanism cover 30 and is connected to the main shaft 17. A connecting plate is provided on the side wall of the energy storage indicator shaft 32, and one side of the connecting plate is in contact with the energy storage spring 20.

[0033] The split-open indicator shaft 31, energy storage indicator shaft 32, energy storage operation shaft 13, and split-open operation shaft 18 are all fixed to the mechanism cover 30 by a fixing flange 33, which is made of polytetrafluoroethylene.

[0034] The gear assembly includes a first crank arm 34, a second crank arm 35, a first gear 36, a first gear shaft 37, a second gear 38, a second gear shaft 39, a third crank arm 40, and a spring mounting shaft 41. The base plate 42 is provided with an energy storage operating shaft 13, a first gear shaft 37, a second gear shaft 39, and a spring mounting shaft 41. The energy storage operating shaft 13 is provided with a first crank arm 34, the first gear shaft 37 is provided with a second crank arm 35 and a first gear 36, the second gear shaft 39 is provided with a second gear 38 and a second crank arm 40, and an energy storage spring 20 is sleeved on the spring mounting shaft 41. The first crank arm 34 and the second crank arm 35 are connected by bolts, the first gear 36 and the second gear 38 mesh, and the spring mounting shaft 41 is connected to the third crank arm 40 by bolts.

[0035] The roller assembly includes a closing half-shaft 46, a first closing stop shaft 48, an output crank arm shaft 54, a opening electromagnet 60, an opening half-shaft 63, and a second opening stop shaft 65, all mounted on a base plate 42. The opening / closing operation shaft 18 is equipped with an opening lever 44 and a closing lever 45. A curved plate 47 is mounted on the closing half-shaft 46. A closing stop 49 is mounted on the first closing stop shaft 48. A wheel 51 and a cam 53 are mounted on the second gear shaft 39. A fourth pin 52 is mounted on the wheel 51. The output crank arm 14 includes an output crank arm shaft 54, a fourth crank arm 55, a fifth crank arm 56, a sixth crank arm 57, a roller 58, and a roller 59. The output crank arm shaft 54 ​​has the fourth crank arm 55, the fifth crank arm 56, and the sixth crank arm 57 arranged sequentially from the distance from the base plate 42 to the distance from the distance from the base plate 42. A roller 59 is located between the fourth crank arm 55 and the fifth crank arm 56. A roller 58 is provided between the fifth crank arm 56 and the sixth crank arm 57. A push rod 61 is provided on the tripping electromagnet 60. A tripping latch plate 62 is provided on the tripping half shaft 63. The tripping latch plate 62 is located above the push rod 61. A first tripping latch 64 is provided on the tripping latch shaft 65. A second tripping latch 68 is provided on one side of the first tripping latch 64. The first tripping latch 64 and the second tripping latch 68 are connected by a connecting pin 66. A convex arc surface 67 is provided below the first tripping latch 64, and a concave arc surface 69 is provided above the second tripping latch 68.

[0036] like Figure 2By rotating the energy storage operating shaft 13 via the energy storage handle 12, the energy storage spring 20 is stretched through the transmission of the first gear, completing the energy storage of the mechanism. By rotating the splitting operating shaft 18 via the splitting handle 19, the output crank arm 14 is driven to rotate through the transmission of the second gear. This rotation, via the connecting rod 15 and the mechanism crank arm 16, drives the main shaft 17 to rotate. The rotation of the main shaft 17 drives the insulating pull rod 24 through the phase crank arm 22 and the first pin 23. This movement, via the adjusting screw 25 and the second pin 26, drives the splitting crank arm 27 to move. This movement, via the third pin 28 and the guide rod 29, drives the internal movement of the arc-extinguishing chamber 6, completing the internal splitting and closing state of the arc-extinguishing chamber, thus realizing the desired state. Figure 1 The circuit breaker shown is open and closed in its main circuit.

[0037] The circuit breaker energy storage is also achieved through the motor 21 via the first and second gears, which stretches the energy storage spring 20 to complete the energy storage mechanism.

[0038] like Figure 3 As shown, the circuit breaker operation indication position is equipped with an opening / closing indicator shaft 31, an opening / closing operation shaft 18, an energy storage indicator shaft 32, an energy storage operation shaft 13, a fixed flange 33, and a mechanism cover 30. When the main circuit switching assembly performs energy storage operation, the energy storage operation shaft 13 rotates along its own axis within the fixed flange 33, and the energy storage indicator shaft 13 rotates along its own axis within the hole of the fixed flange 33. When the mechanism performs opening or closing operation, the opening / closing operation shaft 18 rotates along its own axis within the hole of the fixed flange 33, and the opening / closing indicator shaft 31 rotates along its own axis within the hole of the fixed flange 33.

[0039] like Figure 6 Rotating the energy storage operating shaft 13 causes the first crank arm 34 on the energy storage operating shaft 13 to drive the second crank arm 35 on the second gear shaft 39, and the first gear 36 on the first gear shaft 37 to rotate synchronously. The first gear 36 drives the second gear 38, and the third crank arm 40 rotates synchronously with the second gear 38. The third crank arm 40 drives the spring mounting shaft 41 to move, and the energy storage spring 20 is stretched by the movement of the spring mounting shaft 41 until the third crank arm 40 rotates to a certain specific position, and the energy storage spring 20 is stretched to the corresponding position, thus completing energy storage.

[0040] like Figures 6-9 As shown, when the mechanism is in the initial position, i.e. the open state and the stored energy state, the roller 59 and the concave arc surface 69 of the second open stop 68 are engaged, and the pin 53 on the wheel 51 and the closing stop 49 are pressed together. The pin 53 presses on the concave arc surface 69 above the second open stop 68.

[0041] Rotating the opening / closing operation shaft 18 clockwise causes the closing lever 45 on the shaft to push the bent plate 47. The bent plate 47 then drives the closing half-shaft 46 to rotate counterclockwise. The closing half-shaft 46 drives the closing stop 49 to rotate around the first closing stop shaft 48, causing the left arc-shaped end face of the closing stop 49 to disengage from the fourth pin 52 on the wheel 51. At this point... Figure 6 The energy storage spring 20 self-resets, driving... Figure 6 The spring mounting shaft 41 drives the third crank arm 40. Figure 6 The third crank arm 40 in the middle drives Figure 7 The second gear shaft 39 rotates, which drives the cam 53 to rotate counterclockwise around the second gear shaft 39, pushing the roller 58. The roller 58 drives the output crank arm shaft 54 ​​to rotate clockwise, causing the roller 59 to disengage from the second trip stop 68, thus completing the mechanism closing.

[0042] Rotating the opening and closing operation shaft 18 counterclockwise causes the opening lever 44 on the opening and closing operation shaft 18 to push the push rod 61 on the electromagnet 60, which in turn pushes the opening latch plate 62. The opening latch plate 62 drives the opening half shaft 63 to rotate counterclockwise. The opening half shaft 63 actuates the first opening stop 64, which drives the opening stop shaft 65 to rotate. At the same time, the convex arc surface 67 of the first opening stop 64 presses against the right end face of the second opening stop 68, causing the second opening stop 68 to rotate counterclockwise around the connecting pin 66. This causes the concave arc surface 69 of the second opening stop 68 to hook onto the underside of the roller 59, driving the output crank arm shaft 54 ​​to rotate counterclockwise, thus completing the mechanism's opening.

[0043] Finally, it should be noted that the above specific embodiments are only used to illustrate the technical solution of this utility model and not to limit it. Although this utility model has been described in detail with reference to examples, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications and substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A circuit breaker, characterized in that, include: The circuit breaker housing (9) is provided with an insulating box (7) inside the circuit breaker housing (9). An arc-extinguishing chamber (6) is provided inside the insulating box (7). An inlet assembly is provided on one side of the arc-extinguishing chamber (6), and a conductive clamp (5) is provided on the other side of the arc-extinguishing chamber (6). The conductive clamp (5) is connected to the outlet assembly. A main circuit switching assembly is provided outside the circuit breaker housing (9). The main circuit switching assembly includes an energy storage operating shaft (13), an output crank arm (14), a switching operating shaft (18), a main shaft (17), an energy storage spring (20), and a motor (21). A mechanism crank arm (16) and a phase crank arm (22) are provided on the main shaft (17). The mechanism crank arm (16) is connected to the output crank arm (14). The phase crank arm (22) is connected to the switching crank arm (27). The switching crank arm (27) is connected to a guide rod (29). The guide rod (29) is installed on the arc-extinguishing chamber (6). A gear assembly is provided between the energy storage operating shaft (13) and the energy storage spring (20). By rotating the energy storage operating shaft (13), the energy storage spring (20) is stretched to complete the mechanism energy storage. A roller assembly is provided between the switching operating shaft (18) and the output crank arm (14). By rotating the switching operating shaft (18), the output crank arm (14) is driven to rotate. The circuit breaker housing (9) is provided with a mechanism cover (30), and the mechanism cover (30) is provided with an opening and closing indicator shaft (31) and an energy storage indicator shaft (32).

2. The circuit breaker according to claim 1, characterized in that, The incoming line assembly includes an incoming line connector (8), an incoming line conductive rod (10), and an incoming line bushing (11). One end of the arc-extinguishing chamber (6) is connected to the incoming line connector (8), the incoming line connector (8) is connected to the incoming line conductive rod (10), and the incoming line bushing (11) is disposed on the outer side wall of the circuit breaker housing (9). The end of the incoming line conductive rod (10) away from the incoming line connector (8) extends out of the circuit breaker housing (9) and into the incoming line bushing (11).

3. The circuit breaker according to claim 1, characterized in that, The outgoing assembly includes an outgoing connector (3), an outgoing sleeve (1), and an outgoing conductive rod (2). One end of the conductive clamp (5) is connected to the outgoing connector (3) via a flexible connection (4). The outgoing connector (3) is connected to the outgoing conductive rod (2). The outgoing sleeve (1) is located on the outer wall of the circuit breaker housing (9). One end of the outgoing conductive rod (2) away from the outgoing connector (3) extends out of the circuit breaker housing (9) and into the outgoing sleeve (1).

4. The circuit breaker according to claim 1, characterized in that, The mechanism crank arm (16) is connected to the output crank arm (14) via a connecting rod (15). The phase crank arm (22) is connected to the insulating pull rod (24) via a first pin (23). The insulating pull rod (24) is equipped with an adjusting screw (25). The adjusting screw (25) is connected to the split crank arm (27) via a second pin (26). The split crank arm (27) is connected to the guide rod (29) via a third pin (28).

5. The circuit breaker according to claim 1, characterized in that, An energy storage handle (12) is provided on the energy storage operation shaft (13). The energy storage operation shaft (13) is rotated by the energy storage handle (12) to stretch the energy storage spring (20) and complete the energy storage of the mechanism. A split operation shaft (18) is provided with a split operation handle (19). The split operation shaft (18) is rotated by the split operation handle (19) to drive the output crank arm (14) to rotate.

6. The circuit breaker according to claim 5, characterized in that, One end of the split indicator shaft (31) passes through the mechanism cover (30) and connects to the main shaft (17). A connecting plate is provided on the side wall of the energy storage indicator shaft (32), and one side of the connecting plate is in contact with the energy storage spring (20).

7. The circuit breaker according to claim 1, characterized in that, The split-open indicator shaft (31), energy storage indicator shaft (32), energy storage operation shaft (13), and split-open operation shaft (18) are all fixed to the mechanism cover (30) by a fixed flange (33); the fixed flange (33) is made of polytetrafluoroethylene.

8. The circuit breaker according to claim 1, characterized in that, The gear assembly includes a first crank arm (34), a second crank arm (35), a first gear (36), a first gear shaft (37), a second gear (38), a second gear shaft (39), a third crank arm (40), and a spring mounting shaft (41). The base plate (42) is provided with an energy storage operating shaft (13), a first gear shaft (37), a second gear shaft (39), and a spring mounting shaft (41). The energy storage operating shaft (13) is provided with a first crank arm (34), the first gear shaft (37) is provided with a second crank arm (35) and a first gear (36), the second gear shaft (39) is provided with a second gear (38) and a second crank arm (40), and an energy storage spring (20) is sleeved on the spring mounting shaft (41). The first crank arm (34) and the second crank arm (35) are connected by bolts, the first gear (36) and the second gear (38) mesh, and the spring mounting shaft (41) is connected to the third crank arm (40) by bolts.

9. The circuit breaker according to claim 8, characterized in that, The roller assembly includes a closing half-shaft (46), a first closing stop shaft (48), an output crank arm shaft (54), a opening electromagnet (60), and a opening half-shaft (63) mounted on a base plate (42). The opening and closing operation shaft (18) is provided with an opening lever (44) and a closing lever (45). The closing half-shaft (46) is provided with a bent plate (47). The first closing stop shaft (48) is provided with a closing stop (49). The second gear shaft (39) is provided with a wheel (51) and a cam (53). A fourth pin (52) is provided on the wheel (51). The output crank arm (14) includes an output crank arm shaft (54), a fourth crank arm (55), a fifth crank arm (56), a sixth crank arm (57), a roller (58), and a roller (59). The output crank arm shaft (54) is provided with the fourth crank arm (55), the fifth crank arm (56), and the sixth crank arm (57) in sequence from away from the base plate (42) to near the base plate (42). A roller (59) is provided between the fourth crank arm (55) and the fifth crank arm (56). A roller (58) is provided between the fifth crank arm (56) and the sixth crank arm (57). A push rod (61) is provided on the trip electromagnet (60). A trip buckle plate (62) is provided on the trip half shaft (63). The trip buckle plate (62) is located above the push rod (61).

10. The circuit breaker according to claim 8, characterized in that, The base plate (42) is provided with a second tripping switch shaft (65), the tripping switch shaft (65) is provided with a first tripping switch (64), a second tripping switch (68) is provided on one side of the first tripping switch (64), the first tripping switch (64) and the second tripping switch (68) are connected by a connecting pin (66), the first tripping switch (66) is provided with a convex arc surface (67) below, and the second tripping switch (68) is provided with a concave arc surface (69) above.

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