A trolley rocker device for circuit breaker

Abstract

The present invention provides a trolley rocker device for a circuit breaker, which belongs to an operating mechanism of a protection switch. The trolley rocker device is arranged at the bottom of the circuit breaker, and comprises a screw assembly arranged on a chassis, a nut assembly arranged on the front side of the chassis, and a top pressure assembly arranged on the rear side of the chassis; the screw assembly comprises an outer screw and an inner screw arranged coaxially, the outer screw comprises a main section and an auxiliary section, the auxiliary section is connected to a rocker body, the auxiliary section is fixedly connected to the inner screw, the interior of the main section is hollow and is used to accommodate the inner screw, the main section and the auxiliary section are spliced ​​to form a complete screw, the pitch of the outer screw is greater than the pitch of the inner screw, the interior of the main section close to the top pressure assembly is provided with a hexagonal groove, and the end of the inner screw close to the top pressure assembly is provided with a hexagonal block; the nut assembly comprises a front slider, a left slider and a right slider arranged on both sides of the front slider.

Description

Technical Field

[0001] The invention relates to the technical field of operating mechanisms of protection switches, and in particular to a trolley rocker device for a circuit breaker. Background Art

[0002] The trolley rocker device is an important component of the circuit breaker. One end of the rocker body can be detachably connected to the chassis of the circuit breaker, and is used to drive the chassis to realize the opening and closing mechanism in the circuit breaker, so that the opening and closing mechanism can be opened or closed. In order to effectively prevent the rocker body and the chassis from shifting in the axial direction of the rotating shaft, there is a Chinese patent with application number 2024204067461, which discloses such a circuit breaker rocker assembly that is easy to assemble. By setting a plastic gasket, the rocker body and the chassis can be effectively prevented from shifting in the axial direction of the rotating shaft.

[0003] However, the circuit breaker chassis trolley used in the rocker assembly has the same principle as the common circuit breaker chassis trolleys on the market, which is to drive the lead screw through the rocker body. Limited by the inherent matching of the lead screw and the nut, the speed control of the chassis trolley by the rocker body when driving the chassis trolley forward depends entirely on the operator's operating experience. Summary of the invention

[0004] The present invention aims to solve the above-mentioned technical problem and provides a trolley rocker device for a circuit breaker.

[0005] The technical solution of the present invention is a trolley rocker device for a circuit breaker, which is arranged at the bottom of the circuit breaker and includes a screw assembly arranged on a chassis, a nut assembly arranged on the front side of the chassis, and a top pressure assembly arranged on the rear side of the chassis; the screw assembly includes an outer screw and an inner screw arranged coaxially, the outer screw includes a main section and an auxiliary section, the auxiliary section is connected to a rocker body, the auxiliary section is fixedly connected to the inner screw, the interior of the main section is hollow and accommodates the inner screw, and the main section and the auxiliary section are spliced ​​to form a A complete lead screw, the pitch of the outer lead screw is greater than the pitch of the inner lead screw, a hexagonal groove is provided inside the main section near the side where the top pressure component is located, and a hexagonal block is provided at the end of the inner lead screw near the side where the top pressure component is located; the nut assembly includes a front slider, a left slider and a right slider arranged on both sides of the front slider, a front slide groove is provided at the bottom of the front side of the chassis, and a left slide groove and a right slide groove are provided on both sides of the front slider on the front side of the chassis, the front slide groove is used for sliding connection of the front slider, and the left slide The block and the right sliding block are respectively connected to the left sliding groove and the right sliding groove for sliding sliding connection, and a left spring is arranged in the left sliding groove to enable the left sliding block to press the front sliding block, and a right spring is arranged in the right sliding groove to enable the right sliding block to press the front sliding block, and a left inclined surface and a right inclined surface are respectively arranged on the side where the left sliding block and the right sliding block contact the front sliding block, and side inclined surfaces matching the left inclined surface and the right inclined surface are arranged on both sides of the front sliding block, and buckles for connecting the left sliding block and the right sliding block are also arranged on both sides of the front sliding block, and an outer nut is arranged on the side of the front sliding block facing the inside of the chassis, and the outer nut is matched with the outer screw, and the first half nut and the second half nut are respectively arranged on the side facing the inside of the chassis, and the first half nut and the second half nut are spliced ​​to form an inner nut for matching with the inner screw; the pressing assembly comprises a base shaft fixed to the rear side of the chassis, a pressing spring coaxial with the base shaft is arranged on the base shaft, and a pressing end coaxial with the outer screw is arranged on the pressing spring.

[0006] As an implementation mode, an end shaft hole is provided inside the main section on one side facing the pressing assembly, the pressing spring and the pressing end are inserted into the end shaft hole, and the end shaft hole is connected to the hexagonal groove.

[0007] As an implementation mode, the chassis is provided with positioning rails located on both sides of the outer lead screw, the outer lead screw is provided with a positioning bearing, and both sides of the positioning bearing are provided with sliding ends matching the positioning rails.

[0008] As an embodiment, a first slide track is provided in the left slide groove, a first slide rod inserted into the first slide track is provided on the left side of the left slide groove, the upper and lower sides of the first slide track form a first upper groove and a first lower groove located in the left slide groove, and the left spring is provided in two places and respectively located in the first upper groove and the first lower groove.

[0009] As an embodiment, a second slide track is provided in the right slide groove, a second slide rod inserted into the second slide track is provided on the right side of the right slide groove, the upper and lower sides of the second slide track form a second upper groove and a second lower groove located in the right slide groove, and the right spring is set at two places and respectively located in the second upper groove and the second lower groove.

[0010] As an embodiment, a first through hole is provided at the center of the front slider for the outer screw to pass through, a first half hole is provided on the right side of the left slider, and a second half hole is provided on the left side of the right slider. The first half hole and the second half hole are spliced ​​to form a second through hole for the inner screw to pass through.

[0011] As an implementation mode, travel rollers are provided on both sides of the chassis.

[0012] As an embodiment, an end beam is provided on the front side of the chassis, an operating port for cooperation with the auxiliary section is provided in the middle position of the end beam, locking tongues are provided at both ends of the end beam, and a movable handle for controlling the locking tongue is provided on the upper side of the end beam.

[0013] As an embodiment, the end beam is provided with a waist-shaped hole for the movable handle to slide out of position.

[0014] As an implementation manner, the waist-shaped holes are arranged at four locations.

[0015] Compared with the prior art, the beneficial effect of the present invention is that the trolley rocker device of the circuit breaker is arranged at the bottom of the circuit breaker, and the position of the chassis is adjusted by rotating the rocker body. The outer screw of the trolley rocker device of the circuit breaker is composed of a main section and an auxiliary section, and the main section and the auxiliary section are spliced ​​to form a complete screw. When the rocker body starts to be rotated, the top pressure assembly and the screw assembly are separated. As the rocker body is continuously rotated, the chassis moves outward, and the top pressure end of the top pressure assembly pushes the auxiliary section of the outer screw outward, releasing the cooperation between the outer screw and the outer nut. Under the action of the left spring and the right spring, the left slider and the right slider approach the middle, so that the first half nut and the second half nut form an inner nut for the inner screw to cooperate. Continuously rotating the rocker body is to make the chassis continue to move outward at a low speed with the help of the cooperation of the inner screw and the inner nut, because the pitch of the outer screw is greater than the pitch of the inner screw. After the auxiliary section of the outer screw is pushed out, the chassis can still be driven to move outward by rotating the rocker body because the hexagonal block at the end of the inner screw cooperates with the hexagonal groove in the main section. And because the hexagonal groove allows the hexagonal block to move along a certain distance, the chassis can move outward at a low speed for a certain distance. It should be noted that the low-speed movement of the chassis is the last small section, so the movement range is very limited, and its main function is to reduce the impact of the circuit breaker hitting the end beam. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1A schematic diagram of the structure of a trolley rocker device of a circuit breaker provided in an embodiment of the present invention being installed in an electrical cabinet;

[0017] Figure 2 A first structural schematic diagram of a trolley rocker device for a circuit breaker provided in an embodiment of the present invention;

[0018] Figure 3 A second structural schematic diagram of a trolley rocker device for a circuit breaker provided in an embodiment of the present invention;

[0019] Figure 4 A third structural schematic diagram of a trolley rocker device for a circuit breaker provided in an embodiment of the present invention;

[0020] Figure 5 for Figure 4 The enlarged view of part A of the trolley rocker device of the circuit breaker provided in;

[0021] Figure 6 for Figure 4 The enlarged view of part B of the trolley rocker device of the circuit breaker provided in;

[0022] Figure 7 A first partial enlarged view of a trolley rocker device of a circuit breaker provided in an embodiment of the present invention;

[0023] Figure 8 A second partial enlarged view of the trolley rocker device of the circuit breaker provided in an embodiment of the present invention.

[0024] In the figure: 1, chassis; 2, screw assembly; 3, nut assembly; 4, top pressure assembly; 5, outer screw; 6, inner screw; 7, main section; 8, auxiliary section; 9, rocker body; 10, hexagonal groove; 11, hexagonal block; 12, front slider; 13, left slider; 14, right slider; 15, front slide; 16, left slide; 17, right slide; 18, left spring; 19, right spring; 20, left inclined surface; 21, right inclined surface; 22, side inclined surface; 23, buckle; 24, outer nut; 25, first half nut; 26, second half nut; 27, inner nut; 2 8. Base shaft; 29. ​​Top pressure spring; 30. Top pressure end; 31. End shaft hole; 32. Positioning rail; 33. Positioning bearing; 34. Sliding end; 35. First slideway; 36. First slide bar; 37. First upper groove; 38. First lower groove; 39. Second slideway; 40. Second slide bar; 41. Second upper groove; 42. Second lower groove; 43. First through hole; 44. First half hole; 45. Second half hole; 46. Second through hole; 47. Travel roller; 48. End beam; 49. Operating port; 50. Lock tongue; 51. Movable handle; 52. Waist-shaped hole. DETAILED DESCRIPTION

[0025] The above and other embodiments and advantages of the present invention are described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments.

[0026] In one embodiment, Figures 1 to 7 shown.

[0027] The trolley rocker device of the circuit breaker provided in this embodiment is arranged at the bottom of the circuit breaker, and includes a screw assembly 2 arranged on the chassis 1, a nut assembly 3 arranged on the front side of the chassis 1, and a top pressure assembly 4 arranged on the rear side of the chassis 1; the screw assembly 2 includes a coaxially arranged outer screw 5 and an inner screw 6, the outer screw 5 includes a main section 7 and an auxiliary section 8, the auxiliary section 8 is connected to the rocker body 9, the auxiliary section 8 is fixedly connected to the inner screw 6, the interior of the main section 7 is hollow and accommodates the inner screw 6, the main section 7 and the auxiliary section 8 are spliced ​​to form a complete screw, the outer screw 5 The pitch is greater than the pitch of the inner lead screw 6, a hexagonal groove 10 is provided inside the main section 7 near the side where the top pressure component 4 is located, and a hexagonal block 11 is provided at the end of the inner lead screw 6 near the side where the top pressure component 4 is located; the nut assembly 3 includes a front slider 12, a left slider 13 and a right slider 14 arranged on both sides of the front slider 12, a front slide groove 15 is provided at the bottom of the front side of the chassis 1, and a left slide groove 16 and a right slide groove 17 are provided on both sides of the front slider 12 on the front side of the chassis 1, the front slide groove 15 is for the front slider 12 to slide and connect, and the left slider 13 and the right slider 14 are respectively The left slide groove 16 and the right slide groove 17 are respectively provided with a left spring 18 for making the left slider 13 squeeze the front slider 12, and the right slide groove 17 is provided with a right spring 19 for making the right slider 14 squeeze the front slider 12. The left slider 13 and the right slider 14 are provided with a left inclined surface 20 and a right inclined surface 21 on the side contacting the front slider 12, and the front slider 12 is provided with side inclined surfaces 22 matching the left inclined surface 20 and the right inclined surface 21 on both sides. The front slider 12 is also provided with buckles 23 for connecting the left slider 13 and the right slider 14 on both sides. The front slider 12 is provided with an outer nut 24 on the side facing the inside of the chassis 1, and the outer nut 24 is matched with the outer screw 5. The left slider 13 and the right slider 14 are respectively provided with a first half nut 25 and a second half nut 26 on the side facing the inside of the chassis 1. The first half nut 25 and the second half nut 26 are spliced ​​to form an inner nut 27 for matching with the inner screw 6; the pressing assembly 4 includes a base shaft 28 fixed to the rear side of the chassis 1, and the base shaft 28 is provided with a pressing spring 29 coaxial therewith, and the pressing spring 29 is provided with a pressing end 30 coaxial with the outer screw 5.

[0028] In this embodiment, the trolley rocker device of the circuit breaker is arranged at the bottom of the circuit breaker, and is used to drive the chassis (cart) to realize the opening and closing mechanism in the circuit breaker, so that the opening and closing mechanism can be opened or closed. In order to enable the chassis (cart) to intelligently change speed when the manual trolley is pushed, the mechanical contact of the circuit breaker during the pushing process is improved. The trolley rocker device of the circuit breaker provided in this embodiment adjusts the position of the chassis 1 by rotating the rocker body 9, because the end beam 48 is fixed. By rotating the rocker body 9, the outer lead screw 5 is rotated relative to the end beam 48, and the chassis 1 is moved outward by the cooperation of the outer lead screw 5 and the outer nut 24, which is the traditional trolley driving principle. In this embodiment, the outer lead screw 5 is composed of a main section 7 and an auxiliary section 8, and the main section 7 and the auxiliary section 8 are spliced ​​to form a complete lead screw. When the rocker body 9 starts to be rotated, the top pressure assembly 4 and the lead screw assembly 2 are separated. As the rocker body 9 is continuously rotated, the chassis 1 moves outward, and the pressing end 30 of the pressing assembly 4 pushes the auxiliary section 8 of the outer lead screw 5 outward, releasing the fit between the outer lead screw 5 and the outer nut 24. Specifically, because the pressing end 30 pushes outward, the auxiliary section 8 of the outer lead screw 5, the front slider 12, and the operating port 49 of the end beam 48 all move outward, giving up the position originally sandwiched between the left slider 13 and the right slider 14. Then, under the action of the left spring 18 and the right spring 19, the left slider 13 and the right slider 14 move closer to the middle, so that the first half nut 25 and the second half nut 26 form an inner nut 27 for the fit of the inner lead screw 6. The rocker body 9 is continuously rotated, and the chassis 1 continues to move outward at a low speed by means of the fit between the inner lead screw 6 and the inner nut 27, because the pitch of the outer lead screw 5 is greater than the pitch of the inner lead screw 6. After the auxiliary section 8 of the outer screw 5 is pushed out, the chassis 1 can still be driven to continue to move outward by rotating the rocker body 9, because the hexagonal block 11 at the end of the inner screw 6 cooperates with the hexagonal groove 10 in the main section 7. And because the hexagonal groove 10 allows the hexagonal block 11 to move along it for a distance, the chassis 1 can move outward for a distance at a low speed. It should be noted that the low-speed movement of the chassis 1 is the last small section, so the movement stroke is very limited, and its main function is to reduce the impact of the circuit breaker hitting the end beam 48.

[0029] In this embodiment, if the chassis 1 is to be moved inward, the front slider 12 is pushed into the middle of the left slider 13 and the right inclined surface 21 again by applying pressure inward, through the cooperation of the inclined surfaces 22 on both sides of the front slider 12, the left inclined surface 20 of the left slider 13, and the right inclined surface 21 of the right slider 14. That is, the outer screw 5 and the outer nut 24 of the chassis 1 are driven to cooperate by rotating the rocker body 9.

[0030] In one embodiment, Figure 5 shown.

[0031] The trolley rocker device of the circuit breaker provided in this embodiment has an end shaft hole 31 in its main section 7 facing the side of the top pressure assembly 4, into which the top pressure spring 29 and the top pressure end 30 extend, and the end shaft hole 31 is connected to the hexagonal slot 10.

[0032] In this embodiment, an end shaft hole 31 is provided on the side of the main section 7 facing the pressing assembly 4, and the end shaft hole 31 is connected to the hexagonal groove 10. Then, when the chassis 1 moves outward, the pressing end 30 can enter the hexagonal groove 10 through the end shaft hole 31 until it contacts the hexagonal block 11 on the inner screw 6.

[0033] In one embodiment, Figure 3 shown.

[0034] The trolley rocker device of the circuit breaker provided in this embodiment has positioning rails 32 on both sides of the outer screw 5 on the chassis 1, the outer screw 5 is provided with a positioning bearing 33, and the two sides of the positioning bearing 33 are provided with sliding ends 34 that match the positioning rails 32.

[0035] In this embodiment, the outer lead screw 5 is rotatably connected to the positioning bearing 33, and the sliding ends 34 on both sides of the positioning bearing 33 are slidably connected to the positioning rail 32. When the outer lead screw 5 is rotated, the movement track of the chassis 1 is stabilized by the cooperation between the sliding ends 34 and the positioning rail 32, so that it always moves along the axial direction of the outer lead screw 5.

[0036] In one embodiment, Figure 8 shown.

[0037] The trolley rocker device of the circuit breaker provided in this embodiment has a first slideway 35 in the left slideway 16, a first slide bar 36 inserted into the first slideway 35 is provided on the left side of the left slideway 16, and the upper and lower sides of the first slideway 35 form a first upper groove 37 and a first lower groove 38 located in the left slideway 16, and the left spring 18 is provided at two locations and respectively located in the first upper groove 37 and the first lower groove 38. A second slideway 39 is provided in the right slideway 17, and a second slide bar 40 inserted into the second slideway 39 is provided on the right side of the right slideway 17, and the upper and lower sides of the second slideway 39 form a second upper groove 41 and a second lower groove 42 located in the right slideway 17, and the right spring 19 is provided at two locations and respectively located in the second upper groove 41 and the second lower groove 42.

[0038] In this embodiment, the structure in the left slide groove 16 and the structure in the right slide groove 17 are symmetrical structures. In the left slide groove 16, there are a first upper groove 37 and a first lower groove 38, wherein both grooves have a left spring 18, and the left spring 18 is a spring with a larger stiffness coefficient. The two left springs 18 are used as a group to press the left slider 13 to the right. The movement trajectory of the left slider 13 is limited by the sliding cooperation of the first slideway 35 and the first slide bar 36. In the right slide groove 17, there are a second upper groove 41 and a second lower groove 42, wherein both grooves have a right spring 19, and the right spring 19 is the same as the left spring 18 and is also a spring with a larger stiffness coefficient. The two right springs 19 are used as a group to press the right slider 14 to the left. The movement trajectory of the right slider 14 is limited by the sliding cooperation of the second slideway 39 and the second slide bar 40.

[0039] In one embodiment, Figure 8 shown.

[0040] The trolley rocker device of the circuit breaker provided in this embodiment has a first through hole 43 for the outer screw 5 to pass through provided at the center of the front slider 12, a first half hole 44 is provided on the right side of the left slider 13, and a second half hole 45 is provided on the left side of the right slider 14. The first half hole 44 and the second half hole 45 are spliced ​​to form a second through hole 46 for the inner screw 6 to pass through.

[0041] In this embodiment, a first through hole 43 is provided at the center of the front slider 12, a first half hole 44 is provided on the right side of the left slider 13, and a second half hole 45 is provided on the left side of the right slider 14, so that the first half hole 44 and the second half hole 45 can form a second through hole 46. The first through hole 43 and the second through hole 46 are different in size, the first through hole 43 is for the outer lead screw 5 to pass through, and the second through hole 46 is for the inner lead screw 6 to pass through.

[0042] In one embodiment, Figure 1 shown.

[0043] In the trolley rocker device of the circuit breaker provided in this embodiment, travel rollers 47 are provided on both sides of the chassis 1 .

[0044] In this embodiment, the same structure as the conventional chassis is maintained, and the travel rollers 47 provided on both sides are used to assist the chassis 1 in moving.

[0045] In one embodiment, Figure 2 shown.

[0046] The trolley rocker device of the circuit breaker provided in this embodiment has an end beam 48 on the front side of the chassis 1, an operation port 49 for the auxiliary section 8 to cooperate is provided in the middle of the end beam 48, locking tongues 50 are provided at both ends of the end beam 48, and a movable handle 51 for controlling the locking tongue 50 is provided on the upper side of the end beam 48. The end beam 48 is provided with a waist-shaped hole 52 for the movable handle 51 to slide and give way. The waist-shaped holes 52 are arranged at four locations.

[0047] In this embodiment, locking tongues 50 are provided at both ends of the end beam 48, and the locking tongues 50 at both ends are controlled by movable handles 51. By operating the movable handles 51, the end beam 48 can be fixed on the electrical cabinet through the locking tongues 50, so that the position of the end beam 48 is fixed.

[0048] The above specific implementation methods further describe the invention purpose, technical solutions, and beneficial effects of the present invention in detail. It should be understood that the above are only specific implementation methods of the present invention and are not intended to limit the protection scope of the present invention. It is particularly pointed out that for those skilled in the art, any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A trolley rocker device for a circuit breaker, arranged at the bottom of the circuit breaker, characterized in that: It comprises a screw assembly (2) arranged on a chassis (1), a nut assembly (3) arranged on the front side of the chassis (1), and a pressing assembly (4) arranged on the rear side of the chassis (1); The screw assembly (2) comprises an outer screw (5) and an inner screw (6) which are coaxially arranged, the outer screw (5) comprising a main section (7) and an auxiliary section (8), the auxiliary section (8) being connected to a rocker body (9), the auxiliary section (8) being fixedly connected to the inner screw (6), the interior of the main section (7) being hollow and being used to accommodate the inner screw (6), the main section (7) and the auxiliary section (8) being spliced ​​to form a complete screw, the pitch of the outer screw (5) being greater than the pitch of the inner screw (6), the inner part of the main section (7) being close to the side where the top pressure assembly (4) is located being provided with a hexagonal groove (10), and the end of the inner screw (6) being close to the side where the top pressure assembly (4) is located being provided with a hexagonal block (11); The nut assembly (3) comprises a front slider (12), a left slider (13) and a right slider (14) arranged on both sides of the front slider (12); a front slide groove (15) is provided at the bottom of the front side of the chassis (1); a left slide groove (16) and a right slide groove (17) are provided on the front side of the chassis (1) and located on both sides of the front slider (12); the front slide groove (15) is provided for the front slider (12) to be slidably connected; the left slider (13) and the right slider (14) are provided for the left slide groove (16) and the right slide groove (17) to be slidably connected respectively; and a left spring (18) is provided in the left slide groove (16) to enable the left slider (13) to press the front slider (12); a right spring (19) is provided in the right slide groove (17) to enable the right slider (14) to press the front slider (12); the left slider (13) and the right slider (17) are provided for the right slider (14) to press the front slider (12); A left inclined surface (20) and a right inclined surface (21) are respectively provided on the side of the block (14) contacting the front slider (12); side inclined surfaces (22) matching the left inclined surface (20) and the right inclined surface (21) are respectively provided on the two sides of the front slider (12); buckles (23) for connecting the left slider (13) and the right slider (14) are also provided on the two sides of the front slider (12); an outer nut (24) is provided on the side of the front slider (12) facing the inside of the chassis (1); the outer nut (24) is matched with the outer lead screw (5); a first half nut (25) and a second half nut (26) are respectively provided on the side of the left slider (13) and the right slider (14) facing the inside of the chassis (1); the first half nut (25) and the second half nut (26) are spliced ​​to form an inner nut (27) for matching with the inner lead screw (6); The pressing assembly (4) comprises a base shaft (28) fixed to the rear side of the chassis (1), the base shaft (28) being provided with a pressing spring (29) coaxial therewith, and the pressing spring (29) being provided with a pressing end (30) coaxial with the external lead screw (5).

2. The trolley rocker device of the circuit breaker according to claim 1, characterized in that: An end shaft hole (31) is provided inside the main section (7) on the side facing the pressing assembly (4), and the end shaft hole (31) is for the pressing spring (29) and the pressing end (30) to extend into, and the end shaft hole (31) is connected to the hexagonal groove (10).

3. The trolley rocker device of the circuit breaker according to claim 1, characterized in that: The chassis (1) is provided with positioning rails (32) located on both sides of the external lead screw (5), the external lead screw (5) is provided with a positioning bearing (33), and both sides of the positioning bearing (33) are provided with sliding ends (34) that match the positioning rails (32).

4. The trolley rocker device of the circuit breaker according to claim 1, characterized in that: A first slideway (35) is provided in the left slide groove (16), a first slide rod (36) inserted into the first slideway (35) is provided on the left side of the left slide groove (16), a first upper groove (37) and a first lower groove (38) located in the left slide groove (16) are formed on the upper and lower sides of the first slide groove (35), and the left spring (18) is provided at two locations and respectively located in the first upper groove (37) and the first lower groove (38).

5. The trolley rocker device of the circuit breaker according to claim 1, characterized in that: A second slideway (39) is provided in the right slide groove (17), and a second slide rod (40) inserted into the second slideway (39) is provided on the right side of the right slide groove (17). The upper and lower sides of the second slide groove (39) form a second upper groove (41) and a second lower groove (42) located in the right slide groove (17), and the right spring (19) is provided at two locations and respectively located in the second upper groove (41) and the second lower groove (42).

6. The trolley rocker device of the circuit breaker according to claim 1, characterized in that: A first through hole (43) for the outer lead screw (5) to pass through is provided at the center of the front slider (12), a first half hole (44) is provided on the right side of the left slider (13), and a second half hole (45) is provided on the left side of the right slider (14); the first half hole (44) and the second half hole (45) are spliced ​​to form a second through hole (46) for the inner lead screw (6) to pass through.

7. The trolley rocker device of the circuit breaker according to claim 1, characterized in that: Travel rollers (47) are provided on both sides of the chassis (1).

8. The trolley rocker device of the circuit breaker according to claim 1, characterized in that: An end beam (48) is provided on the front side of the chassis (1), an operating port (49) for cooperation with the auxiliary section (8) is provided in the middle of the end beam (48), locking tongues (50) are provided at both ends of the end beam (48), and a movable handle (51) for controlling the locking tongue (50) is provided on the upper side of the end beam (48).

9. The trolley rocker device of the circuit breaker according to claim 8, characterized in that: The end beam (48) is provided with a waist-shaped hole (52) for the movable handle (51) to slide and give way.

10. The trolley rocker device of the circuit breaker according to claim 9, characterized in that: The waist-shaped holes (52) are arranged at four locations.

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