CN216487923U

CN216487923U - Operating mechanism of circuit breaker

Info

Publication number: CN216487923U
Application number: CN202123390739.2U
Authority: CN
Inventors: 陈斌; 丁晓辉; 周敏琛
Original assignee: Changshu Switchgear Manufacturing Co Ltd
Current assignee: Changshu Switchgear Manufacturing Co Ltd
Priority date: 2021-12-30
Filing date: 2021-12-30
Publication date: 2022-05-10
Anticipated expiration: 2031-12-30

Abstract

An operating mechanism of a circuit breaker belongs to the technical field of low-voltage electrical appliances. The automatic switching device comprises a pair of side plates arranged at intervals, and a switching-on half shaft and a switching-off half shaft which are rotatably arranged between the pair of side plates, wherein the switching-on half shaft triggers an operating mechanism to perform switching-on action after rotating, and the switching-off half shaft triggers the operating mechanism to perform switching-off action after rotating; is characterized in that: also comprises a locking device; when the operating mechanism is in a closing ready state, the locking device locks the opening half shaft, limits the opening half shaft and prevents the opening half shaft from rotating by mistake; when the operating mechanism is in a closing state, the locking device releases the locking of the opening half shaft, so that the opening half shaft can rotate. The advantages are that: the safety of the circuit breaker is improved; the structure is simple.

Description

Operating mechanism of circuit breaker

Technical Field

The utility model belongs to the technical field of low-voltage apparatus, concretely relates to operating device of circuit breaker.

Background

The conventional circuit breaker is widely used in low-voltage power supply and distribution systems due to its excellent protection characteristics. The operating mechanism of the circuit breaker is used for executing the on-off operation of the circuit breaker and is a core component of the circuit breaker.

The circuit breaker operating mechanism has a large impact vibration along with impact energy transfer in the process of starting closing. And with the continuous promotion of circuit breaker current shell frame and break-make capacity, the output energy of circuit breaker operating device constantly promotes, and the impact vibration of closing process is increasingly strong. The tripping hasp of the circuit breaker operating mechanism is likely to deflect under the condition of large impact, and the tripping, namely closing and blasting, is caused under the extreme condition, and the tripping is caused when the circuit breaker is closed. In general, under the condition, the holding force of a brake-separating half shaft can be increased to resist impact vibration, but the brake-separating tripping force of the circuit breaker is also increased, so that higher output force is required for a brake-separating electromagnet, an undervoltage tripper, a tripper and the like, and the risk is increased for reliable brake separation.

In view of the above-mentioned prior art, there is a need for a reasonable improvement in the structure of the existing circuit breaker operating mechanism. The applicant has therefore made an advantageous design, in the context of which the solution to be described below is made.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide an operating device of circuit breaker, it is equipped with a locking device, is in combined floodgate ready state when operating device, locking device locking separating brake semi-axis, restriction separating brake semi-axis, prevent separating brake semi-axis mistake rotate.

The task of the utility model is accomplished in this way, an operating mechanism of a circuit breaker, including a pair of curb plates that set up at interval, switching-on semi-axis and separating brake semi-axis that rotate to set up between a pair of said curb plates, the said switching-on semi-axis rotate after triggering the operating mechanism and closing a floodgate the action, the said separating brake semi-axis rotate after triggering the operating mechanism and separating brake the action; also comprises a locking device; when the operating mechanism is in a closing ready state, the locking device locks the opening half shaft to limit the opening half shaft and prevent the opening half shaft from rotating by mistake; when the operating mechanism is in a closing state, the locking device releases the locking of the opening half shaft, so that the opening half shaft can rotate.

In a specific embodiment of the present invention, a closing lever is provided on the pair of side plates, and the locking device is provided on the closing lever.

In another embodiment of the present invention, the locking device is a separate component that is slidably or rotatably disposed on the side plate.

In another specific embodiment of the present invention, the locking device is provided with a support portion, the opening half shaft is provided with an extending end, and the support portion is matched with the extending end.

In another specific embodiment of the present invention, the abutting portion is a protrusion, and a curved surface is disposed on a side close to the protruding end.

The utility model discloses a still have a concrete embodiment, the combined floodgate lever on still be equipped with and be used for the drive the trigger end of combined floodgate semi-axis action, combined floodgate semi-axis on be equipped with and receive the drive end, the trigger end with receive the drive end cooperation.

In yet another specific embodiment of the present invention, the closing lever further comprises a striking portion for cooperating with a closing electromagnet of the circuit breaker.

In a more specific embodiment of the present invention, the closing lever has a groove, and the side plate has a protruding shaft, the protruding shaft is located in the groove, and the groove slides and/or rotates relative to the protruding shaft.

In yet another specific embodiment of the present invention, the closing lever is provided with a closed slot having two closed ends, wherein one end of the main shaft away from the circuit breaker is engaged with the first spring, and one end of the main shaft close to the circuit breaker is engaged with the second spring; one end of the first spring is hung and leaned on one end of the closed groove, and the other end of the first spring is hung and leaned on the side plate; one end of the second spring is hung and leaned against the other end of the closed groove, and the other end of the second spring is hung and leaned against a hanging and leaning plate on the main shaft.

In a still more specific embodiment of the present invention, the opening half shaft is provided with a restoring member, and the restoring member provides restoring force for the opening half shaft.

The utility model discloses owing to adopted above-mentioned structure, the beneficial effect who has: the operating mechanism comprises a locking device, and when the operating mechanism is in a closing ready state, the locking device locks the opening half shaft, limits the opening half shaft, prevents the opening half shaft from rotating by mistake and improves the safety of the circuit breaker; secondly, simple structure has made a little improvement on original structure's basis, and the practicality is high.

Drawings

Fig. 1 is a schematic view of the operating mechanism of the present invention.

Fig. 2 is an exploded view of the operating mechanism of the present invention.

Fig. 3 is the matching schematic diagram of the closing lever and the opening half shaft of the operating mechanism.

Fig. 4 is the cooperation schematic diagram of the opening half shaft, the opening lever and the connecting rod assembly of the operating mechanism.

Fig. 5 is a schematic diagram of a closing lever of the operating mechanism of the present invention.

Fig. 6 is a schematic diagram of the operating mechanism in a state of readiness for closing.

Fig. 7 is a schematic diagram of the operating mechanism at the beginning of the closing action of the present invention.

Fig. 8 is a schematic diagram of the operating mechanism in the closing state of the present invention.

Fig. 9 is an installation schematic diagram of the operating mechanism of the present invention.

In the figure: 1. a switching-on half shaft 11 is driven by the end; 2. a brake-separating half shaft, 21, an extending end and 22, a restoring piece; 3. a closing lever, 31, a body part, 32, a trigger end, 33, a striking part, 34, a strip groove and 35, a closed groove; 5. a connecting rod assembly; 6. an energy storage spring assembly; 7. a main shaft, 71, a hanging plate and 72, a swing rod; 8. an energy storage lever; 9. a cam assembly; 10. locking device, 101, abutting part, 1011, arc surface; 100. a side plate; 200. a first spring; 300. a second spring; 400. a brake separating button; 500. a closing button; 600. a double-hole nut.

Detailed Description

The following detailed description of the embodiments of the present invention is provided in conjunction with the accompanying drawings, but the description of the embodiments is not intended to limit the technical solutions, and any changes made in the form of the present invention rather than the essential changes should be considered as the protection scope of the present invention.

In the following description, any concept relating to the directions or orientations of up, down, left, right, front, and rear is based on the position shown in the corresponding drawings, and thus should not be construed as particularly limiting the technical solution provided by the present invention.

Referring to fig. 1, 2 and 6, the present invention relates to an operating mechanism of a circuit breaker, including a pair of side plates 100 disposed at an interval, and a closing half shaft 1, a separating half shaft 2, a closing lever 3, a connecting rod assembly 5, an energy storage spring assembly 6, an energy storage lever 8 and a cam assembly 9 are disposed between the pair of side plates 100. A main shaft 7 is arranged between the pair of side plates 100 and the contact of the circuit breaker, and the closing half shaft 1 and the opening half shaft 2 are rotatably arranged between the pair of side plates 100.

As shown in fig. 1, 2, and 6, the closing lever 3 is disposed on one side plate 100, and is configured to receive a driving force of a closing button 500 or a closing electromagnet to rotate, and after the closing lever 3 acts, the closing half shaft 1 is driven to act, so as to unlock the cam assembly 9, so that the energy storage spring assembly 6 releases energy, and the energy storage lever 8 is driven to act, the energy storage lever 8 pushes the connecting rod assembly 5 to act, and the connecting rod assembly 5 drives the main shaft 7 to rotate, so as to complete a closing action.

As shown in fig. 1 to 3 and 6, the opening half shaft 2 is configured to receive the driving of an opening button 400 or an opening electromagnet to rotate, so as to unlock the connecting rod assembly 5, and the connecting rod assembly 5 drives the main shaft 7 to perform an opening operation. The opening half shaft 2 is provided with a restoring piece 22, and the restoring piece 22 provides restoring force for the opening half shaft 2.

As shown in fig. 3 to 6, the operating mechanism includes a locking device 10, and the locking device 10 may be a separate component, or the locking device 10 is formed on the closing lever 3. When the locking device 10 is a separate part, it is slidably or rotatably mounted on the side plate 1. When the operating mechanism is in a closing ready state, the locking device 10 locks the opening half shaft 2, limits the opening half shaft 2 and prevents the opening half shaft 2 from rotating by mistake; when the operating mechanism is in a closing state, the locking device 10 releases the locking of the opening half shaft 2, so that the opening half shaft 2 can rotate. The locking device 10 is configured as described in the following embodiments on the closing lever 3.

The closing lever 3 is generally a plastic part and includes a body 31, the locking device 10 is formed on the body 31, the locking device 10 includes an abutting portion 101, the abutting portion 101 is close to the protruding end 21 of the opening half shaft 2, and the abutting portion 101 cooperates with the protruding end 21 during a closing action to prevent the opening half shaft 2 from rotating mistakenly due to vibration. Preferably, the abutting portion 101 is a protrusion, and an arc 1011 is disposed on a side close to the protruding end 21, and the arc 1011 conforms to a movement track of the closing lever 3 and can better match with the protruding end 21.

As shown in fig. 5 and 6, the closing lever 3 is further provided with a triggering end 32 for driving the closing half shaft 1 to move, and the triggering end 32 pushes and presses the driven end 11 on the closing half shaft 1 in the closing process, so as to drive the closing half shaft 1 to move.

As shown in fig. 5 and 6, the closing lever 3 is further provided with a striking part 33 for engaging with the closing electromagnet, and when the closing electromagnet operates, a striking end of the closing electromagnet extends to press the striking part 33 of the closing lever 3, thereby operating the closing lever 3.

As shown in fig. 1, 5 and 6, the closing lever 3 can slide or rotate relative to the side plate 100, and both can also occur simultaneously. The specific structure is that a strip-shaped groove 34 is formed in the closing lever 3, a protruding shaft is mounted on the side plate 100, the protruding shaft is located in the strip-shaped groove 34, and the strip-shaped groove 34 can slide and/or rotate relative to the protruding shaft.

As shown in fig. 1, 5 and 6, in order to limit the motion trajectory of the closing lever 3 to meet the expected effect of the design, a closed slot 35 for spring connection is provided on the closing lever 3, and the closed slot 35 has two closed ends, wherein one end away from the main shaft 7 is engaged with a first spring 200, and one end close to the main shaft 7 is engaged with a second spring 300. One end of the first spring 200 is hung on one end of the closed slot 35, and the other end is hung on the side plate 100; and one end of the second spring 300 is hung on the other end of the closed groove 35, and the other end of the second spring 300 is hung on the main shaft 7. Specifically, a hanging plate 71 is mounted on the main shaft 7, and the other end of the second spring 300 is hung on the hanging plate 71. The main shaft 7 is fixedly provided with a swing rod 72, and the swing rod 72 is used for driving a moving contact in a circuit breaker contact system to act.

Fig. 6 to 8 are schematic diagrams illustrating the closing operation process of the operating mechanism. Fig. 6 shows a state of ready closing, in which the closing half shaft 1, the opening half shaft 2, and the closing lever 3 are in an inactive state, and the main shaft 7 is in an opening position. The first spring 200 and the second spring 300 act on the closing lever 3, so that the closing lever 3 is stabilized in this position state. At this time, the abutting part 101 of the locking device 10 has reached the position of cooperating with the projecting end 21 of the opening half-shaft 2, preventing the opening half-shaft 2 from malfunctioning.

Fig. 7 is a schematic diagram of the operation mechanism triggered to start the closing operation. The striking part 33 on the closing lever 3 receives the striking of the closing electromagnet to drive the closing lever 3 to move, the closing lever 3 rotates, the triggering end 32 on the closing lever 3 pushes the driven part 11 on the closing half shaft 1, and the closing half shaft 1 rotates, so that the operating mechanism is triggered to perform closing movement. During the closing process, the abutting part 101 of the locking device 10 is always engaged with the protruding end 21 during the rotation of the closing lever 3, so that the abutting part 101 can prevent the malfunction of the opening half shaft 2 during the process.

Fig. 8 is a schematic diagram of the operating mechanism in a closed state. When the main shaft 7 performs a closing operation, the hanging plate 71 rotates along with the main shaft 7 and pulls the second spring 300, the second spring 300 pulls the closing lever 3 to overcome the first spring 200 to be away from the closing half shaft 1 and the opening half shaft 2, and at this time, the abutting part 101 on the locking device 10 is no longer in a state of being matched with the extending end 21. At this time, the opening half shaft 2 can rotate, and the operating mechanism can perform opening action.

As for the locking device 10, which is a separate part and is only responsible for the above-mentioned functions, it may be a swinging member, and in the initial stage, the locking device 10 abuts against the opening half shaft 2 to prevent the operation thereof, and when the main shaft 7 performs the closing operation, the locking device 10 is disengaged, and when the main shaft 7 performs the opening operation, the locking device 10 may be reset by a resetting member.

For another example, the locking device 10 is a sliding member, and the other is consistent with the action process of the swinging member, and only swings but slides.

The components for driving the locking device 10 to operate may be derived from the main shaft 7, or may be the link assembly 5, the energy storage spring assembly 6, the main shaft 7, the energy storage lever 8, and the cam assembly 9.

As shown in fig. 9, in order to make the pitch of the operating mechanism coincide with the pitch of the fastening screw on the base, this is achieved by a double-hole nut 600. The double-hole nuts 600 are a pair and are installed on the base, each double-hole nut 600 is provided with two screw holes, one is used for installing the operating mechanism, and the other is used for tightening the screw in the base. Thereby satisfying the installation of the operating mechanism. Preferably, a corresponding accommodating cavity is formed in the base and used for accommodating the double-hole nut 600, and more preferably, the accommodating cavity is matched with the shape of the double-hole nut 600 to limit the movement of the double-hole nut.

Claims

1. An operating mechanism of a circuit breaker comprises a pair of side plates (100) arranged at intervals, a switching-on half shaft (1) and a switching-off half shaft (2) which are rotatably arranged between the pair of side plates (100), wherein the switching-on half shaft (1) triggers the operating mechanism to perform switching-on action after rotating, and the switching-off half shaft (2) triggers the operating mechanism to perform switching-off action after rotating; the method is characterized in that: also comprises a locking device (10); when the operating mechanism is in a closing ready state, the locking device (10) locks the opening half shaft (2) to limit the opening half shaft (2) and prevent the opening half shaft (2) from rotating by mistake; when the operating mechanism is in a closing state, the locking device (10) releases the locking of the opening half shaft (2), so that the opening half shaft (2) can rotate.

2. The operating mechanism of a circuit breaker according to claim 1, wherein: a closing lever (3) is provided on the pair of side plates (100), and the locking device (10) is formed on the closing lever (3).

3. The operating mechanism of a circuit breaker according to claim 1, wherein: the locking device (10) is an independent part and is arranged on the side plate (100) in a sliding or rotating mode.

4. The operating mechanism of a circuit breaker according to claim 1, wherein: the locking device (10) is provided with an abutting part (101), the opening half shaft (2) is provided with an extending end (21), and the abutting part (101) is matched with the extending end (21).

5. The operating mechanism of a circuit breaker according to claim 4, wherein: the abutting part (101) is a bulge, and an arc surface (1011) is arranged on one side close to the extending end (21).

6. An operating mechanism of a circuit breaker according to claim 2, wherein: closing a floodgate lever (3) on still be equipped with and be used for the drive closing a floodgate semi-axis (1) action trigger end (32), closing a floodgate semi-axis (1) on be equipped with and receive drive end (11), trigger end (32) with receive drive end (11) cooperation.

7. An operating mechanism of a circuit breaker according to claim 2, wherein: the closing lever (3) is also provided with a striking part (33) matched with a closing electromagnet of the circuit breaker.

8. An operating mechanism of a circuit breaker according to claim 2, wherein: a strip-shaped groove (34) is formed in the closing lever (3), a protruding shaft is installed on the side plate (100), the protruding shaft is located in the strip-shaped groove (34), and the strip-shaped groove (34) slides and/or rotates relative to the protruding shaft.

9. The operating mechanism of a circuit breaker according to claim 2, wherein: a closed groove (35) is formed in the closing lever (3), the closed groove (35) is provided with two closed ends, one end, far away from a main shaft (7) of the circuit breaker, of the closed groove is matched with the first spring (200), and the other end, close to the main shaft (7), of the closed groove is matched with the second spring (300); one end of the first spring (200) is hung and leaned on one end of the closed groove (35), and the other end of the first spring is hung and leaned on the side plate (100); one end of the second spring (300) is hung and leaned on the other end of the closed groove (35), and the other end is hung and leaned on a hanging and leaning plate (71) on the main shaft (7).

10. The operating mechanism of a circuit breaker according to claim 1, wherein: and the opening half shaft (2) is provided with a restoring piece (22), and the restoring piece (22) provides restoring force for the opening half shaft (2).