CN111540642A - Operating device and circuit breaker of circuit breaker - Google Patents

Abstract

The invention relates to the technical field of high-voltage switches, in particular to an operating mechanism of a circuit breaker, which comprises a rotating shaft, a rotating shaft and a rotating shaft, wherein the rotating shaft is arranged on a rack; the pawl can be rotatably arranged on the rotating shaft around the axis of the rotating shaft relative to the rack, and keeps a corresponding energy storage device arranged on the rack in an energy storage state under a preset state; the actuating mechanism is movably arranged on the rack and is interacted with the latch to drive the latch to rotate; the two ends of the rolling shaft are fixed on the rolling pieces on the engine; the actuation mechanism has a ramp therein which is held in abutment with the roller and which, during movement, progressively projects towards the roller to urge the detent to rotate. The invention provides an operating mechanism of a circuit breaker with good reliability and the circuit breaker.

Description

Operating mechanism of a circuit breaker and circuit breaker

technical field

The invention relates to the technical field of high-voltage switches, in particular to an operating mechanism of a circuit breaker and a circuit breaker.

Background technique

Vacuum circuit breaker is an indoor power distribution device in a three-phase AC system. It can be used for protection and control of electrical equipment in industrial and mining enterprises, power plants and substations. It is especially suitable for applications requiring no oil, less maintenance and frequent operations. In places of use, vacuum circuit breakers can be configured in central cabinets, double-layer cabinets and fixed cabinets to control and protect high-voltage electrical equipment.

The vacuum circuit breaker is a core component in the switchgear of the inflatable cabinet. The rotation of the output shaft of the operating mechanism drives the rotation of the insulating main shaft of the vacuum switch in the air box, thereby making the movable contact in the vacuum bubble move up and down to realize opening and closing. Function. The vacuum circuit breaker is the most common and practical operating mechanism in the field of high-voltage switches, but most of the operating mechanisms on the market have poor reliability.

For example, a circuit breaker operating mechanism disclosed in Chinese patent document CN107768155A includes a spring energy storage device, a closing device and an opening device, wherein the opening device includes an opening latch, an opening latch pin, an opening pusher One end of the lever and the opening push rod close to the opening brake is provided with an opening cone; push the opening push rod in the direction of the opening lock pin, so that the push rod cone on the opening push rod pushes the opening The lock pin rotates counterclockwise, and the opening lock pin drives the opening lock to rotate counterclockwise to perform the opening action.

In the prior art, since the opening stopper pin is inserted into the opening stopper, the opening stopper pin is pushed by the opening cone on the opening push rod for a long time, so that the opening stopper pin and the opening stopper pin are connected to the opening stopper for a long time. When the brakes are loose, when the opening push rod pushes the branch lock pin, the opening is unreliable; even the opening lock pin is separated from the opening lock, which affects the normal operation of the circuit breaker operating mechanism. Work.

At the same time, the closing device includes a closing push rod and a closing four-link, a pin is arranged on one side of the closing push rod, and one end of the closing push plate is hung on the pin through a waist-shaped hole, and the closing push plate is hung on the pin. The other end is linked with the energy storage release end of the closing detent. When the closing push rod moves inwards under the push of the closing switch, the closing push plate moves downward through the linkage between the pin and the waist-shaped hole, thereby Apply thrust to the energy storage release end of the closing latch.

In the prior art, as the number of linkages between the waist-shaped hole on the closing push plate and the pin increases, the wall of the waist-shaped hole on the closing push plate is generated after long-term use of the closing push plate. Barbs, or even depressions, when the closing push rod is pushed along the axial direction of the closing push rod, there will be a barb that the pin sinks into the hole wall, which makes the closing speed of the closing device slower. ; Or the pin is stuck in the recess and is fixed, causing the closing device to fail to close, thereby reducing the closing reliability of the closing device and affecting the normal operation of the circuit breaker operating mechanism.

SUMMARY OF THE INVENTION

Therefore, the technical problem to be solved by the present invention is to overcome the defect of poor reliability of the operating mechanism in the prior art, so as to provide an operating mechanism for a circuit breaker and a circuit breaker with better reliability.

In order to solve the above technical problems, the present invention provides an operating mechanism for a circuit breaker, including:

The rotating shaft is installed on the frame;

a detent, which is rotatably mounted on the rotating shaft relative to the frame around the axis of the rotating shaft, and keeps the corresponding energy storage device disposed on the frame in an energy storage state in a predetermined state;

an actuating mechanism, movably arranged on the frame, and interacting with the catch to drive the catch to rotate;

The catch is provided with rolling elements fixed on the catch at both ends of the roller; the actuating mechanism has a rolling element that keeps abutting with the rolling element and gradually rolls toward the rolling element during movement The inclined surface of the piece protruding to push the latch to rotate.

Further, the actuating mechanism includes a push rod that is arranged on the frame in parallel with the rotating shaft and moves along the axis of the rotating shaft; and a push plate fixedly arranged on the push rod, and The inclined surfaces that the rolling elements abut against are arranged on the push plate.

Further, the rolling element is fixed to the catcher through a mounting bracket.

Further, the mounting frame is composed of two supporting plates arranged in parallel and a mounting plate connected between the two supporting plates and connected on the same side; the two ends of the roller of the rolling element are fixed on the corresponding The mounting plate is fixed on the catch.

Further, the detent has a manual action part and a holding part, and the rolling element is arranged on the manual action part; the holding part acts with the energy storage device to keep the energy storage device in energy storage. state.

Further, the detent further has an electric action part, and the electric action part drives the detent to rotate under the action of an electric drive device.

The present invention also provides a circuit breaker, wherein the closing device adopts the above-mentioned operating mechanism; wherein the closing latch is rotatably mounted on the rotating shaft relative to the frame around the axis of the rotating shaft. , and keep the closing energy storage device in the energy storage state in the open state; the corresponding closing actuating mechanism is movably arranged on the frame, and acts with the closing latch to drive the The closing latch turns.

Further, the closing energy storage device includes:

The closing energy storage shaft is rotatably installed on the frame, and the closing arm member is fixed thereon;

A closing energy storage spring, one end is connected to a crank shaft on the closing energy storage shaft, and the other end is connected to the frame, and the closing energy storage spring is driven by an external force on the closing energy storage shaft The downward rotation is elongated to generate elastic potential energy, and the state of storing elastic potential energy of the closing energy storage spring is maintained under the abutting action of the holding portion of the closing latch and the closing arm member.

Further, an abutting member that can freely rotate around an axis parallel to the closing energy storage shaft is provided on the closing arm member, and the holding portion of the closing detent is in abutment with the abutting member Maintain a state of stored elastic potential energy.

Further, the closing energy storage shaft can be driven by manual and motorized methods; wherein, the closing energy storage shaft is driven manually by directly rotating the crank; the closing energy storage shaft is also provided with A mechanical drive part is provided with an overrunning clutch between the mechanical drive part and the energy storage shaft; when the overrunning clutch is manually driven, the mechanical drive part does not rotate with the closing energy storage shaft, but When the mechanical driving component rotates, the closing energy storage shaft is driven to rotate.

Further, the mechanical driving component is a set of passive gears arranged on the closing energy storage shaft; the overrunning clutch includes a clutch pawl arranged on the passive gear, which is fixed on the closing energy storage shaft A clutch sleeve with a clutch ratchet is formed on it, and the clutch pawl cooperates with the clutch ratchet to form a ratchet-type overrunning clutch.

Further, the motorized driving mode is motor driving, and the output shaft of the motor drives the mechanical driving component to rotate through a transmission mechanism.

Further, the closing arm member drives the execution shaft to rotate through the closing transmission mechanism to realize closing.

Further, the closing transmission mechanism includes a cam as the closing arm member, and a three-phase crank arm fixed on the execution shaft; after the closing arm member is released by the closing latch , rotates under the drive of the elastic potential energy stored by the closing energy storage spring, collides with and pushes the three-phase arm to rotate, and then drives the execution shaft to rotate.

Further, the opening device adopts the above-mentioned operating mechanism; wherein the opening latch is rotatably mounted on the rotating shaft relative to the frame around the axis of the rotating shaft, and is kept in the closed state. The opening energy storage device is in an energy storage state; the corresponding opening actuating mechanism is movably arranged on the frame, and interacts with the opening latch to drive the opening latch to rotate.

Further, the opening energy storage device includes:

The opening energy storage shaft is rotatably installed on the frame, and the opening arm member is fixed on it;

The opening energy storage spring, one end is connected to the opening energy storage shaft, and the other end is connected to the frame, and the opening energy storage spring rotates when the opening energy storage shaft is driven by an external force to generate elastic potential energy, The state of storing elastic potential energy of the opening energy storage spring is maintained under the abutting action of the holding part of the opening latch and the energy storage stop transmission mechanism that drives and connects the opening arm member.

Further, an opening transmission mechanism is provided between the opening energy storage shaft and the execution shaft.

Further, the opening transmission mechanism includes an opening arm member whose one end is fixed on the opening energy storage shaft, an input crank arm whose one end is fixed on the execution shaft, and is connected to the free end of the input crank arm and the other end. The connecting rod between the free ends of the opening arm piece is formed, thereby forming a four-bar linkage mechanism.

Further, the opening transmission mechanism is a part of the energy storage stop transmission mechanism, and the energy storage stop transmission mechanism also includes a rotating block that is rotatably sleeved on the closing energy storage shaft, and in the energy storage state One end of the rotating block is in contact with the three-phase crank arm fixed on the execution shaft, and the other end is in contact with the opening brake.

Further, one end of the rotating block abutting against the three-phase crank arm is pivotally provided with a closing and holding catch, and the closing and holding catch is subjected to a force that tends to meet the said switch during the closing process. The biasing force of the three-phase crank arm, the closing holding catch is limited to the position where it is in contact with the three-phase crank arm after the closing process is completed and the rotating block; the other end of the rotating block is suitable for the three-phase crank arm. in contact with the opening brake.

Further, the elastic force in the closing energy storage device is greater than the elastic force in the opening energy storage device.

The technical scheme of the present invention has the following advantages:

1. The operating mechanism of the circuit breaker provided by the present invention includes a rotating shaft, which is installed on a frame; a detent, which is rotatably installed on the rotating shaft relative to the frame around the axis of the rotating shaft, and is installed on the rotating shaft. In a predetermined state, the corresponding energy storage device arranged on the frame is kept in the energy storage state; the actuating mechanism is movably arranged on the frame and interacts with the catch to drive the catch Rotation; on the detent there is a rolling member whose two ends of the roller are fixed on the detent; the actuating mechanism has a rolling member that keeps abutting with the rolling member and gradually moves towards the The rolling element protrudes to push the inclined surface of the detent to rotate.

In the circuit breaker, the latch is sleeved on the rotating shaft, and gradually moves toward the direction of the rolling element through the inclined surface provided on the actuating mechanism, so as to push the latch to rotate, so that the energy storage device changes from the energy storage state to the uncharged state. Through the setting of the inclined surface, there is rolling friction between the inclined surface and the rolling element, so as to reduce the force required by the inclined plane to push the detent. When the actuating mechanism pushes the rolling element, the actuating mechanism will rotate relative to The shaft is displaced, so as to promote the stable rotation of the latch, thereby improving the reliability of the latch rotation, and can perform reliable closing or opening actions for the subsequent closing energy storage device or opening energy storage device.

2. In the operating mechanism of the circuit breaker provided by the present invention, the elastic force in the closing energy storage device is greater than the elastic force in the opening energy storage device, so that the closing energy storage device can overcome the spring of the opening energy storage spring force to perform the closing action.

Description of drawings

In order to illustrate the specific embodiments of the present invention or the technical solutions in the prior art more clearly, the following briefly introduces the accompanying drawings that need to be used in the description of the specific embodiments or the prior art. Obviously, the accompanying drawings in the following description The drawings are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can also be obtained based on these drawings without creative efforts.

FIG. 1 shows a schematic structural diagram of the operating mechanism of the present invention used as a closing device of a circuit breaker;

FIG. 2 is a schematic structural diagram of the energy storage state shown in the embodiment shown in FIG. 1 after removing the energy storage device and the mechanical drive components;

FIG. 3 is a schematic structural diagram of the energy release state displayed after removing the energy storage device and the mechanical drive component in the embodiment shown in FIG. 1;

4 is a schematic structural diagram showing that the operating mechanism of the present invention is used as an opening device of a circuit breaker;

5 is a schematic structural diagram of the combination of the opening energy storage device and the opening transmission mechanism in the embodiment shown in FIG. 4;

6 is a schematic structural diagram of a circuit breaker using the operating mechanism of the present invention as a closing device and an opening device respectively;

Description of reference numbers:

1-frame, 2-rotating shaft, 3-closing latch, 4-closing energy storage device, 5-closing energy storage shaft, 6-closing energy storage spring, 7-first hanging plate, 8- Second hanging plate, 9-crank shaft, 10-support shaft, 11-closing arm piece, 12-closing contact piece, 13-driven gear, 14-overrunning clutch, 15-clutch pawl, 16-clutch Sleeve, 17-Clutch pin, 18-Motor, 19-Output shaft, 20-Drive gear, 21-Close manual action part, 22-Close holding part, 23-Close electric action part, 24-First mounting bracket , 25-closing rolling element, 26-closing push rod, 27-closing push plate, 28-closing ramp, 29-closing electromagnet, 30-execution shaft, 31-three-phase crank arm, 32-first 1 abutment, 35-opening brake, 36-opening energy storage device, 37-opening energy storage shaft, 38-opening energy storage spring, 39-positioning pin, 40-opening arm piece, 41 - Input crank arm, 42- connecting rod, 43- rotating block, 44- second contact part, 45- closing holding latch, 46- opening contact part, 47- opening manual action part, 48- point Brake holding part, 49- brake electric action part, 50- second installation frame, 51- brake rolling element, 52- brake push rod, 53- brake push plate, 54- brake slope, 55- brake Electromagnet, 56-torsion spring, 57-pin.

Detailed ways

The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

Referring to an operating mechanism of the present invention shown in FIGS. 1-3, it is used for a circuit breaker closing device, comprising a frame 1; The axis of the frame 1 is rotatably sleeved with a closing latch 3 installed on the rotating shaft 2 as a latch, and is movably arranged on the frame 1 and is connected with the closing latch The closing actuating mechanism (see Figs. 2 and 3) as an actuating mechanism is acted on by the sub-3 phase to drive the closing detent 3 to rotate. The closing stopper 3 keeps the corresponding closing energy storage device 4 arranged on the frame 1 as an energy storage device in an energy storage state in an open state as a predetermined state.

Referring to FIG. 1 , the closing energy storage device 4 includes a closing energy storage shaft 5 and a closing energy storage spring 6 that are rotatably installed on the frame 1 as an energy storage shaft. Both ends of the closing energy storage spring 6 are respectively provided with a first hanging plate 7 and a second hanging plate 8 , and the first hanging plate 7 is rotatably connected with a crank shaft 9 on the closing energy storage shaft 5 , the second hanging plate 8 is connected with the frame 1 through a support shaft 10 rotatably mounted on the frame 1 . Referring to FIG. 2 , a cam-shaped closing arm member 11 is fixed on the closing energy storage shaft 5 , and a cam-shaped closing arm member 11 is provided on the closing arm member 11 that can be wound parallel to the closing energy storage shaft 5 The closing abutment member 12 , which can rotate freely on its axis, is a bearing installed on the pin shaft on the closing arm member 11 in this embodiment. The closing energy storage spring 6 is rotated and elongated to generate elastic potential energy when the closing energy storage shaft 5 is driven by an external force. After the closing energy storage spring 6 passes the dead point, the closing energy storage spring 6 is closed The maximum distance that the energy storage spring 6 is allowed to stretch is the maximum potential energy. One end of the closing energy storage shaft 5 can be connected to a crank handle (not shown in the figure), and the closing energy storage shaft 5 is directly rotated by the crank handle to realize manual driving. A mechanical drive component is also provided on the closing energy storage shaft 5 . Wherein, the mechanical driving component is a set of passive gears 13 arranged on the closing energy storage shaft 5 . An overrunning clutch 14 is provided between the mechanical driving component and the closing energy storage shaft 5 , and the overrunning clutch 14 consists of a clutch pawl 15 arranged on the driven gear 13 and a clutch pawl 15 fixed on the closing energy storage shaft 5 . The energy shaft 5 is formed with a clutch sleeve 16 formed with a clutch ratchet. The clutch pawl 15 is mounted on the driven gear 13 through a clutch pin 17; the clutch pawl 15 is matched with the clutch ratchet. When the overrunning clutch 14 is manually driven, the driven gear 13 does not rotate with the closing energy storage shaft 5 , but drives the closing energy storage shaft 5 to rotate when the passive gear 13 rotates. In this embodiment, the driven gear 13 is driven by an electric mechanism with a motor 18 , and the output shaft 19 of the electric mechanism is meshed with the driven gear 13 through a drive gear 20 as a transmission mechanism. Power is transmitted to the driven gear 13 . At the same time, the driven gear 13 is provided with a torsion spring 56 for pressing the clutch sleeve 16. When the overrunning clutch 14 is in the electric drive mode, due to the setting of the torsion spring 56, the clutch pawl 15 on the driven gear 13 is reliable. Push the clutch sleeve 16 to rotate. After the closing energy storage spring 6 passes the dead point, the motor 18 will not stop immediately. At this time, the clutch pawl 15 is toggled by the pin 57 on the frame 1 and raised to a certain angle, and crosses the clutch sleeve 16. In this way, the motor 18 and the closing latch 3 are protected from being damaged by the residual force of the motor.

Referring to FIG. 2 , the closing latch 3 is basically Y-shaped, and the three arms are a closing manual action part 21 , a closing holding part 22 and a closing electric action part 23 respectively. Wherein, the closing holding portion 22 abuts with the closing abutting member 12 to maintain the state of storing elastic potential energy when the closing energy storage spring 6 is allowed to stretch the maximum potential energy of the maximum distance. On the closing manual action part 21 is fixed a first mounting frame with a U-shaped structure composed of two supporting plates arranged in parallel and a mounting plate connected between the two supporting plates and on the same side 24, wherein the mounting plate is fixedly connected with the closing manual action part 21, and a closing rolling element 25 is arranged in the space of the U-shaped structure between the two supporting plates, and the closing rolling element 25 The two ends of the roller are respectively fixed on the two support plates.

2 and 3 , the closing actuating mechanism includes a manual drive mechanism corresponding to the closing manual action portion 21 of the closing latch 3 and an electric drive mechanism corresponding to the closing electric action portion 23 . The manual drive mechanism includes a closing push rod 26 as a push rod which is arranged on the frame 1 in parallel with the rotating shaft 2 and moves along the axis of the rotating shaft 2, and a closing push rod 26 which is fixedly arranged on the The closing push plate 27 on the closing push rod 26. The closing push plate 27 is provided with a closing plate that keeps in contact with the closing rolling member 25 and gradually protrudes toward the closing rolling member 25 during movement to push the closing latch 3 to rotate. Gate ramp 28. Therefore, by pushing the closing push rod 26 , the closing slope 28 of the closing push plate 27 fixed on it pushes the closing rolling element 25 on the closing manual action part 21 , thereby The closing latch 3 is driven to rotate. The electric drive mechanism includes a closing electromagnet 29 as an electric drive device for driving the closing electric action part 23 . When electrical operation is required, the closing latch 3 is driven to rotate under the action of electromagnetic force by energizing the closing electromagnet 29 .

Referring to FIG. 2 , the rotation of the closing energy storage shaft 5 drives the rotation of the execution shaft 30 for performing opening and closing through a closing transmission mechanism. In this embodiment, the closing transmission mechanism includes the closing arm member 11 and a three-phase crank arm 31 fixed on the execution shaft 30 . The closing arm member 11 is in contact with the first abutting portion 32 on the three-phase crank arm 31 during the rotation with the closing energy storage shaft 5 to push the three-phase crank arm 31 and further The execution shaft 30 is driven to rotate.

The energy storage working process of this embodiment:

In the process of storing energy manually, referring to FIG. 1 , one end of the closing energy storage shaft 5 is connected to a crank handle (not shown in the figure), and the closing energy storage shaft 5 is driven in reverse by the crank handle. Clockwise rotation, so that the crank shaft 9 of the closing energy storage shaft 5 stretches the closing energy storage spring 6, and in the process of the counterclockwise rotation of the closing energy storage shaft 5, it drives the fixed energy storage spring 6 at the same time. The cam-shaped closing arm member 11 on the closing energy storage shaft 5 rotates counterclockwise. Since the overrunning clutch 14 (see FIG. 1 ) is provided between the passive gear 13 and the closing energy storage shaft 5 , the counterclockwise rotation of the closing energy storage shaft 5 by manual energy storage will not be affected. The motor 18, and the interference of the driving gear 20 and the driven gear 13. When the crank shaft 9 on the closing energy storage shaft 5 stretches the closing energy storage spring 6 to pass the dead point (that is, the closing energy storage spring 6 is stretched to the maximum length, it is not suitable for the closing energy storage spring 6). After the rotation position where the torque generated on the brake energy storage shaft 5 is zero), as shown in FIG. The closing holding portion 22 on the fixed closing latch 3 is in contact with each other (the state in FIG. 2 ). At this time, the closing latch 3 keeps the closing energy storage spring 6 disposed on the frame 1 in a stretched energy storage state with elastic potential energy, thereby completing the energy storage process.

In the process of storing energy in an electric way, referring to FIG. 1 , the motor 18 drives the output shaft 19 of the electric mechanism to rotate, and then drives the driving gear 20 to rotate clockwise. The driven gears 13 rotatably sleeved on the closing energy storage shaft 5 mesh with each other, thereby driving the driven gears 13 to rotate counterclockwise. At this time, the overrunning clutch 14 provided between the driven gear 13 and the closing energy storage shaft 5 enables the transmission between the two, specifically the clutch rotatably mounted on the driven gear 13 The pawl 15 has a certain counterclockwise rotational displacement due to its rotation axis and the closing energy storage shaft 5 radially spaced a certain distance, so the clutch pawl 15 itself also has a certain counterclockwise rotational displacement, and is fixed on the closing energy storage shaft. The clutch ratchet teeth on the clutch sleeve 16 on the 5 drive the closing energy storage shaft 5 to rotate counterclockwise, and then the closing energy storage shaft 5 drives the fixed crank shaft 9 through the crank. The closing energy storage shaft 5 also rotates counterclockwise to stretch the closing energy storage spring 6 . The closing arm member 11 fixed on the closing energy storage shaft 5, referring to FIG. 2, rotates counterclockwise with the closing energy storage shaft 5, and the closing energy storage spring 6 stretches After passing the dead point, that is, after the maximum stretching distance of the closing energy storage spring 6 , the closing abutting member 12 on the closing arm member 11 and the The closing latch 3 is in contact (the state in FIG. 2 ). At this time, the closing latch 3 keeps the closing energy storage spring 6 in a stretched energy storage state with elastic potential energy. At the same time, an indicator plate on the closing energy storage shaft 5 rotates from a position showing no energy storage to a position showing energy storage, so that the indicator plate is in contact with the micro switch fixed on the frame 1 (micro-motion). The switch is switched from compressing contact energization to a non-compressing off state), thereby performing signal switching, and stopping the rotation of the motor 18, thereby completing the energy storage action.

The closing working process of this embodiment:

Manually closing: Referring to Figures 2 and 3, manually push the closing push rod 26, so that the closing push plate 27 with the closing slope 28 fixed on the closing push rod 26 abuts against Press the closing roller 25 arranged on the closing manual action part 21 of the closing brake 3, and the closing slope 28 on the closing push plate 27 pushes the closing brake The closing rolling element 25 on the switch 3 reduces the frictional force caused by the direct contact between the closing push plate 27 and the closing manual action part 21 of the closing latch 3 . As the closing slope 28 on the closing push plate 27 pushes against the closing rolling member 25, the closing latch 3 is pushed to rotate counterclockwise around the rotating shaft 2, thereby making all the The closing holding portion 22 on the closing latch 3 is separated from the closing abutting member 12 on the closing arm member 11, and the closing arm member 11 is not subject to the closing. When the closing holding part 22 on the brake latch 3 is in contact with the limit, the closing energy storage spring 6 releases energy, from the position close to the maximum tension, as shown in Figure 2, the energy storage state rapidly shrinks, that is, recovers. to the initial position, that is, the state in which the closing energy storage spring 6 is not stretched as shown in FIG. 3 , thereby driving the closing energy storage shaft 5 to rotate counterclockwise in the state shown in FIG. state, during the counterclockwise rotation of the closing energy storage shaft 5, the closing arm member 11 is driven to rotate counterclockwise; During the counterclockwise rotation, it abuts against the first abutting portion 32 of the three-phase arm 31 fixed on the execution shaft 30. Since the closing energy storage shaft 5 rotates in one direction, therefore The closing arm member 11 must have a sliding process during the process of abutting the first abutting portion 32 directly. In order to reduce the frictional resistance during the sliding process, in this embodiment, the first abutting portion is Bearings are provided at 32 as rollers. After the first abutting portion 32 is hit by the closing arm member 11, the closing arm member 11 pushes the three-phase arm 31 and the fixed arm member 11. The execution shaft 30 rotates clockwise to the state shown in FIG. 3 to complete the closing operation process.

Closing in electric mode: refer to Figures 2 and 3, energize the closing electromagnet 29, and under the action of electromagnetic force, the closing electromagnet 29 pushes the closing electromagnet on the closing latch 3 The action portion 23 moves upward, that is, the closing electric action portion 23 drives the closing latch 3 to rotate counterclockwise around the rotating shaft 2 , thereby causing the closing holding portion on the closing latch 3 to rotate. 22 is separated from the closing abutment member 12 on the closing arm member 11 on the closing energy storage shaft 5, and the closing arm member 11 is not affected by the closing latch 3 When the closing holding part 22 on the upper part is in contact with the limit, the closing energy storage spring 6 releases energy and rapidly shrinks from the energy storage position, that is, returns to the initial position, that is, the closing energy storage spring 6 shown in FIG. 1 . The energy storage spring 6 is in an unstretched state, thereby driving the closing energy storage shaft 5 to rotate counterclockwise, thereby driving the closing arm member 11 fixed on the closing energy storage shaft 5 from the position shown in FIG. 2 . 3, when the closing arm member 11 rotates counterclockwise with the closing energy storage shaft 5, and the three The first abutting portion 32 in the phase arm 31 abuts, and after the first abutting portion 32 is hit by the closing arm member 11 , the closing arm member 11 pushes the three-phase The crank arm 31 and the fixed execution shaft 30 rotate clockwise to the state shown in FIG. 3 to complete the closing operation process.

Referring to FIG. 4 and FIG. 5, it is another embodiment of the operating mechanism of the present invention, which is used in a circuit breaker opening device. Among them, there is an opening latch 35 , which is rotatably sleeved and installed on the rotating shaft 2 relative to the frame 1 around the axis of the rotating shaft 2 as a detent 35 , and is movably arranged on the frame 1 . The opening actuating mechanism is an actuating mechanism that acts with the opening brake 35 to drive the opening brake 35 to rotate. The opening detent 35 keeps the corresponding opening energy storage device 36 provided on the rack 1 as an energy storage device in an energy storage state in a closed state as a predetermined state.

Referring to FIG. 5 , the opening energy storage device 36 includes an opening energy storage shaft 37 that is rotatably installed on the frame 1 as an energy storage shaft, and an opening energy storage shaft 37 sleeved on the opening energy storage shaft 37 The torsion spring serves as the opening energy storage spring 38 . One end of the opening energy storage spring 38 is fixed to the opening energy storage shaft 37 , and the other end is fixed to the frame 1 through a positioning pin 39 . The opening energy storage spring 38 rotates under the driving of the opening energy storage shaft 37 by external torsion to generate elastic potential energy.

Referring to Figures 4 and 5, the rotation of the opening energy storage shaft 37 drives the rotation of the execution shaft 30 for performing opening and closing through an opening transmission mechanism. The opening transmission mechanism includes an opening arm member 40 whose one end is fixed on the opening energy storage shaft 37, an input arm 41 whose one end is fixed on the executing shaft 30, and is pivotally connected to the opening arm 41. The connecting rod 42 between the free end of the input crank arm 41 and the free end of the opening arm member 40 forms a four-bar linkage mechanism. The opening transmission mechanism also acts as a part of the energy storage stop transmission mechanism that keeps the opening energy storage device 36 in the energy storage state in the closed state, which is a predetermined state. The energy storage stop transmission mechanism further includes a rotating block 43 , and the through hole on the rotating block 43 in FIG. 4 is used to rotate and sleeve the closing energy storage shaft 5 (not shown in the figure). In the energy storage state, one end of the rotating block 43 is in contact with the second abutting portion 44 on the three-phase arm 31 fixed on the actuator shaft 30 , and the other end is in contact with the second contact portion 44 on the rotating shaft 2 . The opening brakes 35 are in contact with each other. Similarly, in order to reduce frictional resistance during sliding, in this embodiment, a bearing is also provided at the second abutting portion 44 as a roller. One end of the rotating block 43 abutting against the three-phase arm 31 is pivotally provided with a closing and holding catch 45 , and between the closing and holding catch 45 and the rotating block 43 is provided. A torsion spring that causes the closing retaining catch 45 to be biased toward the second abutting portion 44 during closing, and a torsion block 43 is provided on the rotating block 43 to prevent the closing The retaining catch 45 has a limit surface on the rotating block 43 that moves toward one side of the opening contact portion 46 . After the energy storage process is completed, the closing and holding latch 45 is limited between the rotating block 43 and the three-phase crank arm 31 in the second contact with the three-phase crank arm 31 . The other end of the rotating block 43 is an opening contact portion 46 suitable for abutting with the opening latch 35 . Similarly, in order to contact and separate from the opening latch 35 more smoothly, the opening contact portion 46 of the rotating block 43 is also provided with a bearing as a roller.

The opening brake 35 also has three arms, which are the opening manual action part 47 , the opening holding part 48 and the opening electric action part 49 . Wherein, when the opening energy storage spring 38 has the potential energy of the energy required to complete the opening, the opening holding part 48 abuts against the opening contact part 46 of the rotating block 43 to keep the stored elastic potential energy status. A second mounting frame 50 with a U-shaped structure is fixed on the opening manual action part 47 and is composed of two supporting plates arranged in parallel and a mounting plate connected between the two supporting plates and on the same side. , wherein the mounting plate is fixedly connected with the manual action part 47 of the opening, and the space of the U-shaped structure between the two supporting plates is provided with an opening rolling member 51, and the opening rolling member 51 is Both ends of the roller are respectively fixed on the two support plates.

The opening actuating mechanism, referring to FIG. 4 , corresponding to the opening manual action part 47 and the opening electric action part 49 of the opening stopper 35 has a manual driving mechanism and an electric driving mechanism. The manual drive mechanism includes the opening push rod 52 as a push rod, which is arranged on the frame 1 in parallel with the rotating shaft 2 and moves along the axis direction of the rotating shaft 2, and is fixedly arranged The opening push plate 53 on the opening push rod 52 . The opening push plate 53 is provided with a branch that keeps in contact with the opening rolling member 51 and gradually protrudes toward the opening rolling member 51 during movement to push the opening latch 35 to rotate. Gate ramp 54 . By pushing the opening push rod 52 , the opening push plate 53 fixed on it pushes the opening manual action part 47 through the opening slope 54 , thereby driving the opening latch 35 to rotate. The electric drive mechanism includes an opening electromagnet 55 as an electric drive device for driving the opening electric action part 49 . When electrical operation is required, the opening latch 35 is driven to rotate under the action of electromagnetic force by energizing the opening electromagnet 55 .

The energy storage working process of this embodiment:

Driven by an external force, referring to FIG. 4 , the opening energy storage shaft 37 rotates clockwise (because the view angles of FIG. 4 and FIG. 5 are opposite, so in FIG. 5 , the opening energy storage shaft 37 is reversed Clock rotation. The orientation of the following description is based on the orientation in Figure 4, and Figure 5 provides a structural reference.) The opening energy storage spring 38 sleeved on the opening energy storage shaft 37 is twisted. Generate elastic potential energy. As the opening energy storage shaft 37 rotates clockwise, the opening arm member 40 fixed on the opening energy storage shaft 37 is driven to rotate clockwise together, and the opening arm member 40, The link mechanism formed by the connecting rod 42 and the input crank arm 41 drives the execution shaft 30 fixedly connected with the input crank arm 41 to rotate counterclockwise. In this way, the second abutting portion 44 on the three-phase crank arm 31 fixed on the execution shaft 30 also passes over the rotating block with the counterclockwise rotation of the three-phase crank arm 31 43 is pivotally provided with one end of the closing holding catch 45 . As the closing and holding latch 45 is pressed by the second abutting portion 44 and overcomes the biasing force received by the closing and holding latch 45, the closing and holding latch 45 is oriented away from all The direction of the opening contact part 46 on the rotating block 43 is moved. At the same time, the rotating block 43 is also pushed to rotate clockwise until the opening abutting portion 46 on the rotating block 43 abuts the opening holding portion 48 on the opening latch 35 . The further clockwise rotation of the rotating block 43 is restricted. At this time, the second abutting portion 44 on the three-phase arm 31 continues to push the closing latch 45 on the rotating block 43 to continue to rotate until the second abutting portion 44 crosses the After the closing and holding catch 45 is closed, the closing and holding catch 45 returns to the limit surface under the action of the biasing force exerted by the torsion spring and stops rotating. At this time, the application of the driving external force is stopped, the opening energy storage spring 38 is twisted and the elastic potential energy is partially released, so that the second abutting portion 44 on the three-phase arm 31 abuts against the closing Keep Yuko 45 on. In this state, the force exerted by the second abutting portion 44 on the three-phase arm 31 on the closing holding catch 45 and the opening catch 35 acting on the opening The forces on the abutting portion 46 are offset to maintain the force balance of the rotating block 43 , that is, the opening latch 35 maintains the energy storage state of the opening energy storage spring 38 to complete the energy storage process.

The opening working process of this embodiment:

Manually opening: referring to FIG. 4, manually push the opening push rod 52, so that the opening push plate 53 with the opening slope 54 fixed on the opening push rod 52 presses against The opening roller 51 is arranged on the opening manual action part 47 on the opening brake 35, and the opening slope 54 on the opening push plate 53 pushes the opening brake The opening rolling member 51 on the 35 can reduce the friction force caused by the direct contact and pushing of the opening push plate 53 and the opening manual action part 47 of the opening detent 35 . As the opening slope 54 on the opening push plate 53 pushes against the opening rolling member 51 , the opening latch 35 is pushed to rotate clockwise around the rotating shaft 2 , so that all The opening holding portion 48 on the opening latch 35 is separated from the opening contact portion 46 on the rotating block 43 . At this time, the force balance of the rotating block 43 is broken, and the second abutting portion 44 on the three-phase arm 31 is exerted on the elastic potential energy of the opening energy storage spring 38 under the action of the elastic potential energy of the opening energy storage spring 38 . The force on the closing holding catch 45 of the rotating block 43 causes the rotating block 43 to rotate clockwise. That is, the second abutting portion 44 on the three-phase crank arm 31 loses the support of the closing holding catch 45 . At this time, the opening energy storage spring 38 releases energy, thereby driving the opening energy storage shaft 37 to rotate counterclockwise. During the counterclockwise rotation of the opening energy storage shaft 37, it drives the opening rotation The arm member 40 rotates counterclockwise. The opening arm member 40 drives the execution shaft 30 fixedly connected with the input crank arm 41 to rotate clockwise through the link mechanism formed by the connecting rod 42 and the input crank arm 41 . This completes the opening operation process.

Electrically opening: referring to FIG. 4 , energize the opening electromagnet 55, and under the action of electromagnetic force, the opening electromagnet 55 pushes the opening electric action part on the opening latch 35 49 moves upward, that is, the opening electric action part 49 drives the opening latch 35 to rotate clockwise around the rotating shaft 2 , so that the opening holding part 48 on the opening latch 35 is connected to the opening latch 35 . The opening abutting portion 46 on the rotating block 43 is separated. At this time, the force balance of the rotating block 43 is broken, and the second abutting portion 44 on the three-phase arm 31 is exerted on the The force on the closing holding catch 45 of the rotating block 43 causes the rotating block 43 to rotate clockwise. That is, the second abutting portion 44 on the three-phase crank arm 31 loses the support of the closing holding catch 45 . At this time, the opening energy storage spring 38 releases energy, thereby driving the opening energy storage shaft 37 to rotate counterclockwise. During the counterclockwise rotation of the opening energy storage shaft 37, it drives the opening rotation The arm member 40 rotates counterclockwise. When the opening arm member 40 rotates counterclockwise with the opening energy storage shaft 37 , it drives and connects with the input crank through the four-bar linkage mechanism formed with the connecting rod 42 and the input crank arm 41 . The execution shaft 30 to which the arm 41 is fixedly connected rotates clockwise. This completes the opening operation process.

The present invention also provides a specific embodiment of a circuit breaker, wherein the closing device adopts the operating mechanism of the closing device shown in Figs. operating mechanism. Referring to FIG. 6 , the closing energy storage spring 6 , the first hanging plate 7 and the second hanging plate 8 in the energy storage device are removed for the convenience of showing the internal structure. Wherein, the closing latch 3 and the opening latch 35 are coaxially mounted on the rotating shaft 2 so as to be rotatable relative to the frame 1 around the axis of the rotating shaft 2 respectively. The closing arm member 11 is fixed on the closing energy storage shaft 5 , and the rotating block 43 and the closing arm member 11 are coaxially rotatably sleeved on the closing energy storage shaft 5 on. The first abutting portion 32 and the second abutting portion 44 are arranged in parallel on the same three-phase crank arm 31 .

In this embodiment, the energy storage working process and the closing working process of the closing device are the same as the energy storage working process and the closing working process in the above-mentioned embodiments of the closing device, and will not be repeated here.

During the closing operation, the rotation of the closing arm member 11 touches the first abutting portion 32 on the three-phase arm 31 fixed on the execution shaft 30, and the first contact portion 32 An abutting portion 32 and the second abutting portion 44 are arranged on the same three-phase arm 31 in parallel, so that after the closing arm member 11 is released by the closing latch 3, the The closing energy storage spring 6 rotates counterclockwise under the drive of storing elastic potential energy, until the closing arm member 11 is in contact with the first abutting portion 32, and pushes the three-phase arm 31 to rotate clockwise, In turn, the execution shaft 30 is driven to rotate clockwise, and the input arm 41 fixed on the execution shaft 30 is also driven to rotate clockwise. Therefore, the power is transmitted to the opening energy storage shaft 37 through the input crank arm 41 , the connecting rod 42 and the opening arm member 40 . With the rotation of the opening energy storage shaft 37, the opening energy storage spring 38 sleeved on the opening energy storage shaft 37 is twisted to generate elastic potential energy, that is, in this embodiment, The external force applied during the energy storage process of the opening energy storage device 36 comes from the force converted from the energy released by the closing energy storage device 4 . The closing energy storage spring 6 in the closing energy storage device 4 The elastic force is greater than the elastic force of the opening energy storage spring 38 in the opening energy storage device 36 .

When the three-phase arm 31 fixed on the execution shaft 30 rotates clockwise, the second abutting portion 44 provided on it also passes over the rotating block 43 and is pivotally provided. One end of the closing and holding latch 45 , when the closing arm member 11 pushes the three-phase arm 31 to the separated position, the closing and holding latch 45 is held by the second abutting portion 44 . Squeeze and overcome the biasing force received by the closing holding catch 45 , the closing holding catch 45 moves in a direction away from the opening contact portion 46 on the rotating block 43 . At the same time, the rotating block 43 is also pushed to rotate counterclockwise until the opening abutting portion 46 on the rotating block 43 abuts the opening holding portion 48 on the opening latch 35 . The further counterclockwise rotation of the rotating block 43 is restricted. At this time, the second abutting portion 44 on the three-phase arm 31 continues to push the closing latch 45 on the rotating block 43 to continue to rotate counterclockwise until the second abutting portion After 44 passes the closing and holding catch 45 , the closing and holding catch 45 returns clockwise under the action of the biasing force exerted by the torsion spring, and stops rotating against the limiting surface. At this time, the elastic potential energy of the closing energy storage spring 6 in the closing energy storage device 4 (not shown in FIG. 6 , please refer to FIG. 1 ) has been released, and the opening energy storage spring 38 is twisted. The generated elastic potential energy is partially released, so that the second abutting portion 44 on the three-phase crank arm 31 abuts on the closing latch 45 . In this state, the force exerted by the second abutting portion 44 on the three-phase arm 31 on the closing holding catch 45 and the opening catch 35 acting on the opening The forces on the abutting portion 46 are offset to keep the force balance of the rotating block 43 , that is, the opening latch 35 maintains the energy storage state of the opening energy storage spring 38 to complete the energy storage process.

In this embodiment, the opening operation process is the same as the opening operation process in the above-mentioned embodiment of the opening device, and will not be repeated here. It should be noted that, after the closing process is completed, the closing arm member 11 and the first abutting portion 32 of the three-phase arm 31 have been separated. During the opening process, the closing arm member 11 will not have any influence on the opening process.

The above-mentioned embodiments are merely examples for clear illustration, and are not intended to limit the implementation manner. For those of ordinary skill in the art, changes or modifications in other different forms can also be made on the basis of the above description. There is no need and cannot be exhaustive of all implementations here. And the obvious changes or changes derived from this are still within the protection scope of the present invention.

Claims (21)

1. An operating mechanism for a circuit breaker, comprising: The rotating shaft (2) is installed on the frame (1); The detent is rotatably mounted on the rotating shaft (2) relative to the frame (1) around the axis of the rotating shaft (2), and is kept on the frame (1) in a predetermined state The corresponding energy storage device above is in the energy storage state; an actuating mechanism, movably arranged on the frame (1), and interacting with the catch to drive the catch to rotate; It is characterized in that, The catch is provided with rolling elements fixed on the catch at both ends of the roller; the actuating mechanism has a rolling element that keeps abutting with the rolling element and gradually rolls toward the rolling element during movement The inclined surface of the piece protruding to push the latch to rotate. 2. The operating mechanism of the circuit breaker according to claim 1, characterized in that, the actuating mechanism comprises a frame (1) which is arranged in parallel with the rotating shaft (2) and rotates along the A push rod that moves in the axial direction of the shaft (2); and a push plate fixedly arranged on the push rod, and the inclined surface abutting against the rolling element is arranged on the push plate. 3. The operating mechanism of the circuit breaker according to claim 1 or 2, wherein the rolling element is fixed to the catcher through a mounting bracket. 4 . The operating mechanism of the circuit breaker according to claim 3 , wherein the mounting bracket is composed of two supporting plates arranged in parallel and a mounting plate connected between the two supporting plates and connected on the same side. 5 . ; Both ends of the roller of the rolling element are fixed on the corresponding plastic support plate, and the mounting plate is fixed on the catch. 5. The operating mechanism of the circuit breaker according to any one of claims 1-4, wherein the catch has a manual action part and a holding part, and the rolling element is arranged on the manual action part ; the holding part acts with the energy storage device to keep the energy storage device in an energy storage state. 6 . The operating mechanism of the circuit breaker according to claim 5 , wherein the latch further has an electric action part, and the electric action part drives the latch to rotate under the action of an electric drive device. 7 . 7. A circuit breaker, wherein the closing device adopts the operating mechanism according to any one of the above claims 1-6; The axis is rotatably mounted on the rotating shaft (2) relative to the frame (1), and keeps the closing energy storage device (4) in the energy storage state in the opening state; the corresponding closing actuating mechanism It is movably arranged on the frame (1), and interacts with the closing latch (3) to drive the closing latch (3) to rotate. 8. The circuit breaker according to claim 7, wherein the closing energy storage device (4) comprises: The closing energy storage shaft (5) is rotatably mounted on the frame (1), and the closing arm member (11) is fixed thereon; A closing energy storage spring (6), one end is connected to a crank shaft (9) on the closing energy storage shaft (5), and the other end is connected to the frame (1), the closing energy storage The spring (6) is rotated and elongated to generate elastic potential energy when the closing energy storage shaft (5) is driven by an external force, and is held between the holding part of the closing latch (3) and the closing arm member ( 11) The state of storing elastic potential energy of the closing energy storage spring (6) is maintained under the abutment action. 9 . The circuit breaker according to claim 8 , wherein the closing arm member ( 11 ) is provided with a switch that can freely rotate around an axis parallel to the closing energy storage shaft ( 5 ). 10 . A brake abutting member (12), the holding portion of the closing latch (3) abuts against the closing abutting member (12) to maintain a state of storing elastic potential energy. 10. The circuit breaker according to claim 8 or 9, characterized in that the closing energy storage shaft (5) can be driven in two ways: manual and motorized; wherein, the crankshaft (9) directly rotates the The closing energy storage shaft (5) is manually driven; a mechanical driving part is also provided on the closing energy storage shaft (5), between the mechanical driving part and the energy storage shaft (5) An overrunning clutch (14) is provided; when the overrunning clutch (14) is manually driven, the mechanical driving component does not rotate with the closing energy storage shaft (5), but drives the mechanical driving component when it rotates The closing energy storage shaft (5) rotates. 11. The circuit breaker according to claim 10, wherein the mechanical driving component is a set of passive gears (13) arranged on the closing energy storage shaft (5); the overrunning clutch (14) It comprises a clutch pawl (15) arranged on the driven gear (13), a clutch sleeve (16) fixed on the closing energy storage shaft (5) and formed with a clutch ratchet tooth, and the clutch pawl ( 15) Cooperate with the clutch ratchet to form a ratchet-type overrunning clutch (14). 12 . The circuit breaker according to claim 10 or 11 , wherein the motorized driving mode is motor driving, and the output shaft ( 19 ) of the motor ( 18 ) drives the mechanical driving component to rotate through a transmission mechanism. 13 . 13. The circuit breaker according to any one of claims 8-12, wherein the closing arm member (11) drives the actuator shaft (30) to rotate through the closing transmission mechanism to realize closing. 14. The circuit breaker according to claim 13, characterized in that, the closing transmission mechanism comprises a cam as the closing arm member (11), and three cams fixed on the execution shaft (30) Phase arm (31); after the closing arm piece (11) is released by the closing latch (3), it rotates under the drive of the elastic potential energy stored by the closing energy storage spring (6), and collides with And push the three-phase crank arm (31) to rotate, thereby driving the execution shaft (30) to rotate. 15. The circuit breaker according to any one of claims 7-14, wherein the opening device adopts the operating mechanism according to any one of the above claims 1-4; wherein the opening latch (35) The rotating shaft (2) is rotatably mounted on the rotating shaft (2) relative to the frame (1) around the axis of the rotating shaft (2), and keeps the opening energy storage device (36) in energy storage in the closed state state; the corresponding opening actuating mechanism is movably arranged on the frame (1), and interacts with the opening latch (35) to drive the opening latch (35) to rotate. 16. The circuit breaker according to claim 15, wherein the opening energy storage device (36) comprises: The opening energy storage shaft (37) is rotatably mounted on the frame (1), and the opening arm member (40) is fixed thereon; An opening energy storage spring (38), one end is connected to the opening energy storage shaft (37), and the other end is connected to the frame (1), the opening energy storage spring (38) is connected to the opening energy storage shaft (38) The energy storage shaft (37) is driven by an external force to generate elastic potential energy, and the holding part of the opening brake (35) is in contact with the energy storage stop transmission mechanism that drives the opening arm member (40). Under the contact action, the state of storing elastic potential energy of the opening energy storage spring (38) is maintained. 17. The circuit breaker according to claim 16, characterized in that an opening transmission mechanism is provided between the opening energy storage shaft (37) and the execution shaft (30). 18. The circuit breaker according to claim 17, characterized in that, the opening transmission mechanism comprises an opening arm member (40), one end of which is fixed on the opening energy storage shaft (37), and one end is fixed on the opening arm member (40). an input crank arm (41) on the actuator shaft (30), and a connecting rod (42) connected between the free end of the input crank arm (41) and the free end of the opening arm member (40), This constitutes a four-bar linkage. 19. The circuit breaker according to claim 17 or 18, characterized in that, the opening transmission mechanism is a part of the energy storage stop transmission mechanism, and the energy storage stop transmission mechanism further comprises a rotary sleeve connected to the transmission mechanism. The rotating block (43) on the closing energy storage shaft (5), one end of the rotating block (43) in the energy storage state is connected to the three-phase arm (43) fixed on the execution shaft (30). 31) are in contact with each other, and the other end is in contact with the opening brake (35). 20. The circuit breaker according to claim 19, characterized in that, a closing holding catch ( 45), the closing and holding catch (45) is subjected to a biasing force that tends to meet the three-phase arm (31) during the closing process, and the closing and holding catch (45) is in the closing state. After the process is completed, it is limited with the rotating block (43) at a position that is in contact with the three-phase arm (31). 35) Abutting. 21. The circuit breaker according to any one of claims 17-20, wherein the elastic force in the closing energy storage device (4) is greater than the elastic force in the opening energy storage device (36).

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