Manual closing and opening device of circuit breaker and circuit breaker

Abstract

The present disclosure discloses a manual closing and opening device for a circuit breaker and a circuit breaker. The manual closing and opening device for a circuit breaker includes a chassis, a drive plate located on the side of the chassis and rotatably connected to the chassis, and a closing linkage assembly and an opening linkage assembly, both of which are transmission-connected to the drive plate. A closing operating lever and an opening operating lever are provided on the drive plate. When a closing force is applied to the closing operating lever, the drive plate rotates in a first direction relative to the chassis and drives the closing linkage assembly to perform a closing action. When an opening force is applied to the opening operating lever, the drive plate rotates in a second direction relative to the chassis and drives the opening linkage assembly to perform an opening action.

Description

Technical Field

[0001] The present disclosure relates to the field of electrical equipment, and in particular to a manual closing and opening device for a circuit breaker and a circuit breaker. Background Art

[0002] Switchgear performs switching, control, and protection functions in power generation, transmission, distribution, and conversion. Circuit breakers are one of the most critical components of switchgear and are typically housed within the switchgear enclosure. Circuit breakers are typically equipped with manual closing and opening mechanisms, most of which are located on the front of the circuit breaker enclosure. However, in some specialized installation environments, installing the manual closing and opening mechanisms on the front of the enclosure does not allow for adequate operator access. Therefore, existing manual closing and opening mechanisms cannot meet the installation requirements of these specialized environments. Summary of the Invention

[0003] In order to solve the problem in the related art that a manual closing and opening operating device is installed on the front of a chassis which does not meet the installation requirements, the present disclosure provides a manual closing and opening device for a circuit breaker and a circuit breaker.

[0004] The present disclosure provides a manual closing and opening device for a circuit breaker, comprising:

[0005] Chassis;

[0006] a driving paddle, located on a side of the chassis and rotatably connected to the chassis, the driving paddle being provided with a closing operating lever and an opening operating lever, and when a closing force is applied to the closing operating lever, the driving paddle rotates in a first direction relative to the chassis, and when an opening force is applied to the opening operating lever, the driving paddle rotates in a second direction relative to the chassis;

[0007] A closing linkage assembly is in transmission connection with the driving plate, and when the driving plate rotates in a first direction, it drives the closing linkage assembly to perform a closing action;

[0008] The opening linkage assembly is in transmission connection with the driving plate, and when the driving plate rotates in the second direction, it drives the opening linkage assembly to perform the opening action.

[0009] Optionally, the driving plate is provided with a first waist-shaped opening and a second waist-shaped opening;

[0010] The closing linkage assembly comprises a closing operation pin, and the closing operation pin is inserted into the first opening;

[0011] The closing linkage assembly has an opening operation pin, and the opening operation pin is inserted into the second opening;

[0012] When the driving paddle rotates in the first direction, the opening operating pin moves relative to the driving paddle in the second opening and remains stationary relative to the chassis, and the closing operating pin is limited to the end portion of the first opening and remains stationary relative to the driving paddle to follow the movement of the driving paddle relative to the chassis. When the driving paddle rotates in the second direction, the closing operating pin moves relative to the driving paddle in the first opening and remains stationary relative to the chassis, and the opening operating pin is limited to the end portion of the second opening and remains stationary relative to the driving paddle to follow the movement of the driving paddle relative to the chassis.

[0013] Optionally, the closing linkage component includes:

[0014] A closing linkage shaft is mounted on the front of the chassis;

[0015] A closing input crank arm, one end of which is drivingly connected to the driving paddle and the other end of which is connected to the closing linkage shaft, and when the driving paddle rotates in a first direction relative to the chassis, the closing input crank arm is driven to rotate, and the closing linkage shaft is driven to rotate;

[0016] The closing output crank arm is connected to the closing linkage shaft, and the closing output crank arm rotates when the closing linkage shaft rotates to contact or move away from the closing switch on the chassis.

[0017] Optionally, the closing input crank arm portion includes a closing input crank arm and a closing connecting rod;

[0018] One end of the closing input crank arm is connected to the closing linkage shaft, and the other end is rotatably connected to one end of the closing link via a first connecting shaft. A first angle is formed between the closing input crank arm and the closing link, and the magnitude of the first angle changes when the driving plate rotates in the first direction.

[0019] The other end of the closing link is provided with the closing operation pin, so as to be driven to rotate by the driving plate through the closing operation pin.

[0020] Optionally, the closing output arm portion includes:

[0021] A closing output crank arm, comprising a vertical plate and a horizontal plate, wherein the vertical plate is connected to the closing linkage shaft;

[0022] The closing crank arm pin has one end mounted on the horizontal plate of the closing output crank arm, and the other end faces the closing switch and approaches and touches the closing switch under the drive of the closing linkage shaft.

[0023] Optionally, the opening linkage component includes:

[0024] A trip linkage shaft is mounted on the front of the chassis;

[0025] A trip input crank arm, one end of which is transmission-connected to the driving plate, and the other end of which is connected to the trip linkage shaft, so that when the driving plate rotates in the second direction relative to the chassis, the trip input crank arm is driven to rotate, and the trip linkage shaft is driven to rotate;

[0026] The trip output arm portion is connected to the trip linkage shaft, and the trip output arm portion rotates when the trip linkage shaft rotates to contact or move away from the trip switch on the chassis.

[0027] Optionally, the closing input portion includes an opening input crank arm and an opening connecting rod;

[0028] One end of the trip input crank arm is connected to the trip linkage shaft, and the other end is rotatably connected to one end of the trip connecting rod via a second connecting shaft. A second angle is formed between the trip input crank arm and the trip connecting rod, and the size of the second angle changes when the driving plate rotates in the second direction.

[0029] The other end of the opening connecting rod is provided with the opening operating pin, so as to be driven to rotate by the driving plate through the opening operating pin.

[0030] Optionally, the trip output arm portion includes:

[0031] The trip output arm includes a trip vertical plate and a trip horizontal plate, wherein the trip vertical plate is connected to the trip linkage shaft;

[0032] One end of the trip arm pin is mounted on the trip horizontal plate, and the other end faces the trip switch and approaches and touches the trip switch under the drive of the trip linkage shaft.

[0033] Optionally, the opening linkage shaft sleeve is provided on the closing linkage shaft of the closing linkage assembly, and the length of the opening linkage shaft is smaller than the length of the closing linkage shaft, so that both ends of the closing linkage shaft are exposed from the opening linkage shaft;

[0034] A rotating ring is sleeved on the closing linkage shaft, and the rotating ring contacts the inner wall of the opening linkage shaft to reduce rotational friction.

[0035] Optionally, a first fixing seat is further installed on the front of the chassis, the first fixing seat comprising a web fixedly connected to the chassis and wing plates arranged on both sides of the web, the opening linkage shaft passes through one of the wing plates, and the closing linkage shaft passes through both wing plates;

[0036] A second fixing seat is further installed on the side of the chassis. The second fixing seat is an L-shaped plate. The transverse plate of the L-shaped plate is connected to the chassis, and the opening linkage shaft passes through the second fixing seat.

[0037] Optionally, the drive plate is rotatably connected to the side of the chassis through a rotating pin, and a reset torsion spring is sleeved on the rotating pin. One end of the reset torsion spring is located on the outside of the closing operating pin, and the other end is located on the outside of the opening operating pin, so as to reset the drive plate after the drive plate rotates to the required stroke.

[0038] Optionally, the first opening and the second opening are bent into waist-shaped holes with an arc relative to the rotating pin, and the first opening and the second opening are located on a circle with the rotating pin as the center, and the first opening and the second opening are symmetrically arranged relative to the rotating pin.

[0039] Optionally, the curvature of the first opening is equal to the curvature of the motion trajectory of the opening operating pin when the opening linkage assembly rotates from the initial position to the completion of opening;

[0040] The curvature of the second opening is equal to the curvature of the motion trajectory of the closing operating pin when the closing linkage assembly rotates from the initial position to the completion of closing.

[0041] Optionally, a fixing plate is further provided on the side of the chassis, the fixing plate is provided with a first waist-shaped limiting hole, and the closing operation pin is limited at the end of the first limiting hole under the action of the reset torsion spring, and the fixing plate is also provided with a second waist-shaped limiting hole, and the opening operation pin is limited at the end of the second limiting hole under the action of the reset torsion spring.

[0042] The present disclosure further provides a circuit breaker, comprising the above-mentioned circuit breaker manual closing and opening device.

[0043] The technical solutions provided by the embodiments of the present disclosure may have the following beneficial effects:

[0044] The present disclosure provides a manual closing and opening device for a circuit breaker, comprising a chassis, a drive plate located on the side of the chassis and rotatably connected to the chassis, a closing linkage assembly and an opening linkage assembly, both of which are transmission-connected to the drive plate. A closing operating lever and an opening operating lever are provided on the drive plate. When a closing force is applied to the closing operating lever, the drive plate rotates in a first direction relative to the chassis, and drives the closing linkage assembly to perform a closing action. When an opening force is applied to the opening operating lever, the drive plate rotates in a second direction relative to the chassis, and drives the opening linkage assembly to perform an opening action. The manual closing and opening device for a circuit breaker disclosed in the present disclosure arranges the closing operating lever and the opening operating lever on the drive plate, and the drive plate is arranged on the side of the chassis. Therefore, the operator can operate on the side of the chassis, which is convenient for the operator to operate and meets the installation requirements of special environments. In addition, the closing linkage assembly and the opening linkage assembly are driven to rotate by the same drive plate, which can reduce parts and achieve the purpose of reducing the structure.

[0045] It should be understood that the foregoing general description and the following detailed description are exemplary only and are not restrictive of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and, together with the description, serve to explain the principles of the present disclosure.

[0047] Figure 1 The present invention is a three-dimensional schematic structural diagram showing a manual closing and opening device of a circuit breaker in an initial position according to an exemplary embodiment.

[0048] Figure 2 yes Figure 1 Schematic side view of .

[0049] Figure 3 yes Figure 1 Front view of .

[0050] Figure 4 yes Figure 1 Schematic diagram of part of the structure.

[0051] Figure 5 It is a schematic three-dimensional structural diagram of a manual closing and opening device of a circuit breaker in an open position according to an exemplary embodiment.

[0052] Figure 6 The figure is a schematic three-dimensional structural diagram of a manual closing and opening device of a circuit breaker in a closing position according to an exemplary embodiment.

[0053] Figure 7 is a schematic diagram of the three-dimensional structure of a circuit breaker according to an exemplary embodiment. DETAILED DESCRIPTION

[0054] In order to further illustrate the principle and structure of the present disclosure, preferred embodiments of the present disclosure are now described in detail with reference to the accompanying drawings.

[0055] like Figure 1 As shown, the present disclosure provides a manual closing and opening device 100 for a circuit breaker, comprising a chassis 10, a drive plate 20 located on a side of the chassis 10 and rotatably connected to the chassis 10, and a closing linkage assembly 30 and an opening linkage assembly 40, both of which are transmission-connected to the drive plate 20. A closing operating lever 21 and an opening operating lever 22 are provided on the drive plate 20. When the closing operating lever 21 applies a closing force, the drive plate 20 rotates in a first direction relative to the chassis 10, driving the closing linkage assembly 30 to perform a closing action. When the opening operating lever 22 applies an opening force, the drive plate 20 rotates in a second direction relative to the chassis 10, driving the opening linkage assembly 40 to perform an opening action.

[0056] The disclosed manual circuit breaker closing and opening device 100 has a closing lever 21 and an opening lever 22 mounted on a drive plate 20. The drive plate 20 is also mounted on the side of the chassis 10. This allows operators to operate the device from the side of the chassis 10, meeting the requirements of installation in specialized environments. Furthermore, the closing and opening linkage assemblies 30 and 40 are driven by the same drive plate 20, reducing component count and achieving a streamlined structure.

[0057] Combine Figure 2 As shown, the drive plate 20 is a plate-like structure with a notch. Two protrusions extend from either side of the notch. A closing lever 21 is mounted on one protrusion, and an opening lever 22 is mounted on the other. A mounting hole 23 is defined in the drive plate 20. A pivot pin 24 extends through the mounting hole 23, rotatably attaching the drive plate 20 to the side of the chassis 10. The opening lever 22 and closing lever 21 are located above and below the mounting hole 23, respectively.

[0058] It should be noted here that the "up", "down", "left", "right", "front" and "back" referred to in this disclosure refer to the orientation of the corresponding components in the current drawings. They are only for the convenience of describing this disclosure and simplifying the description, and do not indicate or imply that the referred components must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limiting the present disclosure.

[0059] When an external closing force (i.e., an external force that drives the paddle in a first direction) is applied to the closing operating lever 21, causing the driving paddle 20 to rotate in the first direction indicated by arrow a1, the closing linkage assembly 30 performs the closing action. When an external opening force (i.e., an external force that drives the paddle in a second direction) is applied to the opening operating lever 22, causing the driving paddle 20 to rotate in the second direction indicated by arrow a2, the opening linkage assembly 40 performs the opening action.

[0060] The driving plate 20 is provided with a first opening 25 in a waist shape with a curvature and a second opening 26 in a waist shape with a curvature. Figure 2 As shown, the first opening 25 and the second opening 26 are bent into arc-shaped waist-shaped holes relative to the rotating pin 24, and the first opening 25 and the second opening 26 are located on a circumference with the rotating pin 24 as the center. The center lines of the first opening 25 and the second opening 26 along the bending direction can coincide with or be parallel to the arc line with the rotating pin 24 as the center. In this way, the driving plate 20 can pivot around the rotating pin 24 as the center. In addition, the first opening 25 and the second opening 26 are symmetrically arranged relative to the rotating pin 24. The closing linkage assembly 30 has a closing operation pin 31, which is inserted into the first opening 25 and can move back and forth in the first opening 25. The opening linkage assembly 40 has an opening operation pin 41, which is inserted into the second opening 26 and can move back and forth in the second opening 26. The curvature of the first opening 25 is equal to the curvature of the movement path of the opening operating pin 41 when the opening linkage assembly 40 rotates from the initial position to the completion of the opening. The curvature of the second opening 26 is equal to the curvature of the movement path of the closing operating pin 31 when the closing linkage assembly 30 rotates from the initial position to the completion of the closing.

[0061] When the driving plate 20 rotates in the first direction, the end of the closing operating pin 31 located in the first opening 25 remains stationary relative to the driving plate 20, following the movement of the driving plate 20 relative to the chassis 10. In other words, the closing operating pin 31 does not move within the first opening 25, but instead rotates about the rotating pin 24 driven by the driving plate 20. The opening operating pin 41 moves within the second opening 26 relative to the driving plate 20 but remains stationary relative to the chassis 10. In other words, the opening operating pin 41 remains stationary relative to the chassis 10.

[0062] When the driving plate 20 rotates in the second direction, the end of the opening operating pin 41 located in the second opening 26 remains stationary relative to the driving plate 20, following the movement of the driving plate 20 relative to the chassis 10. In other words, the opening operating pin 41 does not move within the second opening 26, but instead rotates about the rotating pin 24 driven by the driving plate 20. The closing operating pin 31 moves within the first opening 25 relative to the driving plate 20 but remains stationary relative to the chassis 10. In other words, the closing operating pin 31 remains stationary relative to the chassis 10.

[0063] Continue reading Figure 1 The closing linkage assembly 30 includes a closing linkage shaft 32 , a closing input arm portion 33 , and a closing output arm portion 34 . The closing linkage shaft 32 is mounted on the front of the chassis 10 .

[0064] One end of the closing input crank arm 33 is transmission-connected to the driving plate 20 , and the other end is connected to the closing linkage shaft 32 . When the driving plate 20 rotates in the first direction relative to the chassis 10 , the closing input crank arm 33 is driven to rotate, and the closing linkage shaft 32 is driven to rotate.

[0065] The closing input crank arm 33 includes a closing input crank arm 331 and a closing linkage 332. One end of the closing input crank arm 331 is connected to the first end of the closing linkage shaft 32, and the other end is rotatably connected to one end of the closing linkage 332 via a first connecting shaft 333. A first angle is formed between the closing input crank arm 331 and the closing linkage 332, the magnitude of which changes when the driving plate 20 rotates in the first direction. The closing operating pin 31 is disposed on the other end of the closing linkage 332. Thus, when the driving plate 20 rotates in the first direction, the closing operating pin 31 drives the closing input crank arm 331 and the closing linkage 332 to rotate, thereby driving the closing linkage shaft 32 to rotate.

[0066] The closing output arm portion 34 is connected to the closing linkage shaft 32 , and the closing output arm portion 34 rotates when the closing linkage shaft rotates to contact or move away from the closing switch on the chassis 10 .

[0067] The closing output crank arm portion 34 includes a closing output crank arm 341 and a closing crank arm pin 342. Figure 3As shown, the closing output crank arm 341 is L-shaped, and includes a vertical plate 341a and a horizontal plate 341b. The vertical plate 341a has a protrusion with a through hole formed on the protrusion. The closing linkage shaft 32 passes through the through hole, so that the closing output crank arm 341 is rotatably connected to the closing linkage shaft 32. One end of the closing crank arm pin 342 is installed on the end of the horizontal plate 341b away from the closing linkage pin shaft 32, and the other end is a free end and faces the closing switch on the chassis 10. Driven by the closing linkage shaft 32, it approaches the closing switch and directly contacts or touches the closing switch. When the closing switch is touched, and combined with Figure 2 After the driving plate 20 rotates the angle of the second opening 26, the circuit breaker switch inside the chassis 10 will automatically close. After the closing arm pin 342 touches the closing switch, the external force applied to the closing operating lever 21 disappears, and the closing linkage assembly 30 will return to its initial state.

[0068] Continue reading Figure 1 The opening linkage assembly 40 includes an opening linkage shaft 42, an opening input arm portion 43, and an opening output arm portion 44. The opening linkage shaft 42 is mounted on the front of the chassis 10.

[0069] One end of the trip input arm 43 is transmission-connected to the driving plate 20 , and the other end is connected to the trip linkage shaft 42 . When the driving plate 20 rotates in the second direction relative to the chassis 10 , the trip input arm 43 is driven to rotate, and the trip linkage shaft 42 is driven to rotate.

[0070] The trip input arm portion 43 includes a trip input arm 431 and a trip connecting rod 432. One end of the trip input arm 431 is connected to the first end of the trip linkage shaft 42, and the other end is rotatably connected to one end of the trip connecting rod 432 via a second connecting shaft. A second angle is formed between the trip input arm 431 and the trip connecting rod 432, the magnitude of which changes when the driving plate 20 rotates in the second direction. The other end of the trip connecting rod 432 is provided with the aforementioned trip operating pin 41. Thus, when the driving plate 20 rotates in the second direction, the trip input arm 431 and the trip connecting rod 432 are driven to rotate by the trip operating pin 41, thereby driving the trip linkage shaft 42 to rotate.

[0071] The trip output arm portion 44 is connected to the trip linkage shaft 42 , and the trip output arm portion 44 rotates when the trip linkage shaft rotates to contact or move away from the trip switch on the chassis 10 .

[0072] The trip output crank arm portion 44 includes a trip output crank arm 441 and a trip crank arm pin 442. Figure 3As shown, the trip output crank arm 441 is L-shaped, and includes a trip vertical plate 441a and a trip horizontal plate 441b. The trip vertical plate 441a has a protrusion with a through hole formed thereon. The trip linkage shaft 42 passes through the through hole, so that the trip output crank arm 441 is rotatably connected to the trip linkage shaft 42. One end of the trip crank arm pin 442 is mounted on the end of the trip horizontal plate 441b away from the trip linkage shaft 42, and the other end is a free end and faces the trip switch on the chassis 10. Driven by the trip linkage shaft 42, it approaches the trip switch and directly contacts or touches the trip switch. When the trip switch is touched, and combined with Figure 2 After the driving plate 20 rotates the angle of the first opening 25, the circuit breaker switch inside the chassis 10 will perform the opening operation. After the opening arm pin 442 touches the opening switch, the external force applied to the opening operating rod 22 disappears, and the opening linkage assembly 40 will return to its initial state.

[0073] The closing linkage shaft 32 and the opening linkage shaft 42 are located on the same straight line. Specifically, the closing linkage shaft 32 can be sleeved onto the opening linkage shaft 42 of the opening linkage assembly. The opening linkage shaft 42 is shorter than the closing linkage shaft 32, so that both ends of the closing linkage shaft 32 are exposed from the opening linkage shaft 42, allowing the closing input arm 33 and the closing output arm 34 to be directly connected to the closing linkage shaft 32. This design makes the structure more compact and reduces the space occupied by various components.

[0074] Furthermore, in order to reduce the rotational friction between the opening linkage shaft 42 and the closing linkage shaft 32 , a rotating ring 37 is sleeved on the closing linkage shaft 32 , and the rotating ring 37 contacts the inner wall of the opening linkage shaft 42 .

[0075] The structure in which the opening linkage shaft 42 is sleeved on the closing linkage shaft 32 of the closing linkage assembly has another advantage, which is that it can be installed using the same fixing seat, thus reducing the number of related parts and further achieving the purpose of reducing production costs. Figure 1 , a first fixing seat 35 is also installed on the front of the chassis 10. The first fixing seat 35 includes a web 351 fixedly connected to the chassis 10 and wing plates 352 and 353 arranged on both sides of the web 351. The opening linkage shaft 42 and the closing linkage shaft 32 both pass through one of the wing plates 352, and the closing linkage shaft 32 also passes through the other wing plate 353. In this way, one end of the opening linkage shaft 42 and the closing linkage shaft 32 are installed on the first fixing seat 35. A second fixing seat 46 is also installed on the front of the chassis 10. The second fixing seat 46 is an L-shaped plate, combined with Figure 3As shown, the L-shaped plate includes a transverse plate 461 fixed to the chassis 10 and a hanging plate 462 perpendicular to the transverse plate 461. The hanging plate 462 has an opening for the opening linkage shaft 42 to pass through. The opening linkage shaft 42 and the closing linkage shaft 32 pass through the opening, so that the other ends of the opening linkage shaft 42 and the closing linkage shaft 32 are mounted on the second fixing seat 46.

[0076] In this way, the opening linkage shaft 42 and the closing linkage shaft 32 are positioned and installed by using the same fixing seat, which saves the use of parts.

[0077] like Figure 4 As shown, the driving plate 20 is set on the side of the chassis through a rotating pin 24, and a reset torsion spring 27 is sleeved on the rotating pin 24. One end of the reset torsion spring 27 is located outside the closing operation pin 31, and the other end is located outside the opening operation pin 41. After the driving plate 20 rotates to the required stroke, the driving plate 20 is restored to its initial position. When the closing linkage assembly 30 completes closing, or the opening linkage assembly 40 completes opening, the closing linkage assembly 30 or the opening linkage assembly 40 automatically returns to the position shown in the figure through the reset torsion spring 27. Figure 1 The driving plate 20 is also restored to the initial position.

[0078] like Figure 5 and Figure 6 As shown, a fixing plate 50 is also provided on the side of the chassis 10. The fixing plate 50 is provided with a first limiting hole 51. The closing operating pin 31 passes through the closing connecting rod 332, with one end of the pin falling into the first limiting hole 51 and the other end falling into the first opening 25, and can move back and forth between the first opening 25 and the first limiting hole 51. Under the action of the reset torsion spring 27, the closing operating pin 31 is limited at the end of the first limiting hole 51, that is, the closing operating pin 31 is limited to the initial position. The fixing plate 50 also has a second limiting hole 52. The opening operating pin 41 passes through the opening connecting rod 432, with one end of the pin falling into the second limiting hole 52 and the other end falling into the second opening 26, and can move back and forth between the second opening 26 and the second limiting hole 52. Under the action of the reset torsion spring 27, the opening operating pin 41 is limited at the end of the second limiting hole 52, that is, the opening operating pin 41 is limited to the initial position.

[0079] In addition to limiting the closing and opening operating pins 31 and 41, the first limiting hole 51 and the second limiting hole 52 also play a role in avoiding the movement of the closing and opening operating pins 31 and 41. The length of the first limiting hole 51 is slightly larger than the maximum path that the closing operating pin 31 can move, and the angle of the second limiting hole 52 is slightly larger than the maximum path that the opening operating pin 41 can rotate. The maximum path refers to the maximum path that the opening operating pin 41 or the closing operating pin 31 can move from. Figure 1From the initial position shown to Figure 5 The open position shown or Figure 6 The distance required to move to the closed position shown.

[0080] The principle of the manual closing and opening device of the circuit breaker will be introduced in detail as follows.

[0081] like Figure 1 As shown, in the initial position, the reset torsion spring 27 acts on the opening operating pin 41 and the closing operating pin 31, and the opening operating pin 41 and the closing operating pin 31 are limited by the fixed plate 50, so that the driving plate 20 is stationary in the initial position.

[0082] like Figure 5 As shown, when opening is required, the opening lever 22 is operated in the second direction (i.e., clockwise), driving the paddle 20 to rotate about the rotating pin 24 in the second direction. This, in turn, drives the opening linkage assembly 40 to rotate via the opening connecting rod 432, causing the opening crank arm pin 442 to move toward the interior of the chassis 10. When the first opening 25 in the driving paddle 20 corresponding to the closing operating pin 31 rotates to a predetermined angle, the driving paddle 20 is restrained by the closing operating pin 31 and stops rotating. At this point, the opening crank arm pin 442 has moved the required distance and contacted the opening switch. Simultaneously, as the opening operating pin 41 moves, the force applied by the return torsion spring 27 increases. The greater the force applied by the return torsion spring 27 to the closing operating pin 31, the more the closing linkage assembly 30 remains in its initial position. After reaching this angle, the opening lever 22 is no longer operated, and the driving paddle 20 is reset by the return torsion spring 27, returning to its initial position.

[0083] like Figure 6 As shown, when a closing operation is required, the closing lever 21 is operated in the first direction (i.e., counterclockwise), driving the shift plate 20 to rotate counterclockwise about the rotation pin 24. The closing linkage assembly 30 is rotated via the closing link 332, causing the closing lever pin 342 to move toward the interior of the chassis 10. When the shift plate 20 rotates to a predetermined angle corresponding to the second opening 26 on the opening pin 41, it is restrained by the opening pin 41 and stops rotating. At this point, the closing lever pin 342 has moved the required distance and contacted the closing switch. Simultaneously, during the closing operation, the force of the return spring 27 increases. As the return spring 27 exerts greater force on the opening pin 41, the return linkage assembly 40 remains in its initial position. After reaching this angle, the closing lever 21 is no longer operated, and the shift plate 20 returns to its initial position under the action of the return spring 27.

[0084] like Figure 7As shown, the present disclosure further provides a circuit breaker 1, which includes the manual circuit breaker closing and opening device 100 described in any of the above embodiments. The circuit breaker 1 also includes a pole 61 mounted on the base of a chassis 10, a current transformer 62 mounted on the outlet end of the pole 61 via a limit assembly 64, and a voltage transformer 63 mounted on the top of the chassis 10. A fuse 66 is mounted on the surface of the voltage transformer 63 near the pole 61.

[0085] The above are only preferred feasible embodiments of the present disclosure and are not intended to limit the protection scope of the present disclosure. Any equivalent structural changes made using the contents of the present disclosure and the drawings are included in the protection scope of the present disclosure.

Claims

1. A manual closing and opening device for a circuit breaker, characterized in that: include: Chassis; a driving paddle, located on a side of the chassis and rotatably connected to the chassis, the driving paddle being provided with a closing operating lever and an opening operating lever, and when a closing force is applied to the closing operating lever, the driving paddle rotates in a first direction relative to the chassis, and when an opening force is applied to the opening operating lever, the driving paddle rotates in a second direction relative to the chassis; A closing linkage assembly is in transmission connection with the driving plate, and when the driving plate rotates in a first direction, it drives the closing linkage assembly to perform a closing action; The opening linkage assembly is in driving connection with the driving plate, and when the driving plate rotates in the second direction, it drives the opening linkage assembly to perform the opening action; The driving plate is provided with a first waist-shaped opening and a second waist-shaped opening; The closing linkage assembly comprises a closing operation pin, and the closing operation pin is inserted into the first opening; The closing linkage assembly has an opening operation pin, and the opening operation pin is inserted into the second opening; When the driving paddle rotates in the first direction, the opening operating pin moves relative to the driving paddle in the second opening and remains stationary relative to the chassis, and the closing operating pin is limited to the end portion of the first opening and remains stationary relative to the driving paddle to follow the movement of the driving paddle relative to the chassis. When the driving paddle rotates in the second direction, the closing operating pin moves relative to the driving paddle in the first opening and remains stationary relative to the chassis, and the opening operating pin is limited to the end portion of the second opening and remains stationary relative to the driving paddle to follow the movement of the driving paddle relative to the chassis.

2. The circuit breaker manual closing and opening device according to claim 1, characterized in that: The closing linkage component includes: A closing linkage shaft is mounted on the front of the chassis; A closing input crank arm, one end of which is drivingly connected to the driving paddle and the other end of which is connected to the closing linkage shaft, and when the driving paddle rotates in a first direction relative to the chassis, the closing input crank arm is driven to rotate, and the closing linkage shaft is driven to rotate; The closing output crank arm is connected to the closing linkage shaft, and the closing output crank arm rotates when the closing linkage shaft rotates to contact or move away from the closing switch on the chassis.

3. The manual closing and opening device for circuit breaker according to claim 2, characterized in that: The closing input crank arm portion includes a closing input crank arm and a closing connecting rod; One end of the closing input crank arm is connected to the closing linkage shaft, and the other end is rotatably connected to one end of the closing link via a first connecting shaft. A first angle is formed between the closing input crank arm and the closing link, and the magnitude of the first angle changes when the driving plate rotates in the first direction. The other end of the closing link is provided with the closing operation pin, so as to be driven to rotate by the driving plate through the closing operation pin.

4. The manual closing and opening device for circuit breaker according to claim 3, characterized in that: The closing output arm portion includes: A closing output crank arm, comprising a vertical plate and a horizontal plate, wherein the vertical plate is connected to the closing linkage shaft; The closing crank arm pin has one end mounted on the horizontal plate of the closing output crank arm, and the other end faces the closing switch and approaches and touches the closing switch under the drive of the closing linkage shaft.

5. The manual closing and opening device for circuit breaker according to any one of claims 1 to 4, characterized in that: The opening linkage assembly includes: A trip linkage shaft is mounted on the front of the chassis; A trip input crank arm, one end of which is transmission-connected to the driving plate, and the other end of which is connected to the trip linkage shaft, so that when the driving plate rotates in the second direction relative to the chassis, the trip input crank arm is driven to rotate, and the trip linkage shaft is driven to rotate; The trip output arm portion is connected to the trip linkage shaft, and the trip output arm portion rotates when the trip linkage shaft rotates to contact or move away from the trip switch on the chassis.

6. The manual closing and opening device for circuit breaker according to claim 5, characterized in that: The opening input crank arm portion includes an opening input crank arm and an opening connecting rod; One end of the trip input crank arm is connected to the trip linkage shaft, and the other end is rotatably connected to one end of the trip connecting rod via a second connecting shaft. A second angle is formed between the trip input crank arm and the trip connecting rod, and the size of the second angle changes when the driving plate rotates in the second direction. The other end of the opening connecting rod is provided with an opening operating pin, so as to be driven to rotate by the driving plate through the opening operating pin.

7. The circuit breaker manual closing and opening device according to claim 6, characterized in that: The trip output arm portion includes: The trip output arm includes a trip vertical plate and a trip horizontal plate, wherein the trip vertical plate is connected to the trip linkage shaft; One end of the trip arm pin is mounted on the trip horizontal plate, and the other end faces the trip switch and approaches and touches the trip switch under the drive of the trip linkage shaft.

8. The manual closing and opening device for circuit breaker according to claim 5, characterized in that: The opening linkage shaft sleeve is arranged on the closing linkage shaft of the closing linkage assembly, and the length of the opening linkage shaft is smaller than the length of the closing linkage shaft, so that both ends of the closing linkage shaft are exposed from the opening linkage shaft; A rotating ring is sleeved on the closing linkage shaft, and the rotating ring contacts the inner wall of the opening linkage shaft to reduce rotational friction.

9. The circuit breaker manual closing and opening device according to claim 8, characterized in that: A first fixing base is further installed on the front of the chassis. The first fixing base includes a web fixedly connected to the chassis and wing plates arranged on both sides of the web. The opening linkage shaft passes through one of the wing plates, and the closing linkage shaft passes through both wing plates. A second fixing seat is further installed on the side of the chassis. The second fixing seat is an L-shaped plate. The transverse plate of the L-shaped plate is connected to the chassis, and the opening linkage shaft passes through the second fixing seat.

10. The manual closing and opening device for circuit breaker according to claim 1, characterized in that: The driving plate is rotatably connected to the side of the chassis through a rotating pin. A reset torsion spring is sleeved on the rotating pin. One end of the reset torsion spring is located on the outside of the closing operating pin, and the other end is located on the outside of the opening operating pin, so as to reset the driving plate after the driving plate rotates to the required stroke.

11. The circuit breaker manual closing and opening device according to claim 10, characterized in that: The first opening and the second opening are bent into waist-shaped holes with an arc relative to the rotating pin, and the first opening and the second opening are located on a circle with the rotating pin as the center, and the first opening and the second opening are symmetrically arranged relative to the rotating pin.

12. The circuit breaker manual closing and opening device according to claim 11, characterized in that: The curvature of the first opening is equal to the curvature of the movement trajectory of the opening operating pin when the opening linkage assembly rotates from the initial position to the completion of opening; The curvature of the second opening is equal to the curvature of the motion trajectory of the closing operating pin when the closing linkage assembly rotates from the initial position to the completion of closing.

13. The manual closing and opening device for circuit breaker according to claim 10, characterized in that: A fixing plate is also provided on the side of the chassis, and a first waist-shaped limiting hole is opened on the fixing plate. The closing operation pin is limited at the end of the first limiting hole under the action of the reset torsion spring. The fixing plate is also provided with a second waist-shaped limiting hole. The opening operation pin is limited at the end of the second limiting hole under the action of the reset torsion spring.

14. A circuit breaker, characterized in that: It comprises the manual closing and opening device for circuit breaker according to any one of claims 1 to 13.

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