CN219163309U - Driving mechanism of circuit breaker and circuit breaker - Google Patents

Abstract

The embodiment of the utility model discloses a driving mechanism of a circuit breaker and the circuit breaker, wherein the driving mechanism comprises an electromagnetic driving piece and a transmission assembly; the transmission assembly comprises a linkage piece and a movable piece, the linkage piece is driven by the electromagnetic driving piece to rotate, and the movable piece can rotate along with the rotation of the linkage piece and also can rotate around the other end of the linkage piece. The linkage piece is provided with a perforation for the movable iron core to pass through, and when the electromagnetic driving piece is started, the movable iron core is retracted and the linkage piece is enabled to rotate from a linkage stop position to a direction close to the magnetic yoke to a linkage actuating position. The movable part has various action modes, is favorable for meeting complex control requirements, and the movable range of the linkage part is closer to the electromagnetic driving part, so that the occupied space of the driving mechanism is reduced.

Description

Driving mechanism of circuit breaker and circuit breaker

Technical Field

The utility model relates to the technical field of piezoelectric devices, in particular to a driving mechanism of a circuit breaker and the circuit breaker.

Background

A circuit breaker refers to a switching device capable of closing, carrying and opening a current under normal circuit conditions and closing, carrying and opening a current under abnormal circuit conditions within a prescribed time.

In order to realize the switching-on and switching-off of the circuit breaker, a driving mechanism is usually required to be arranged in the circuit breaker, and a common power source of the driving mechanism comprises motor drive and electromagnetic drive, wherein the motor drive can be matched with a gear to realize complex actions, but the manufacturing precision is high, the assembly is difficult and the cost is high. Electromagnetic driving is simple in structure and low in cost, but is difficult to realize complex driving actions, so that the electromagnetic driving is generally used in a scene that only simple actions are needed, such as tripping. Thus, the prior art fails to provide a complex motion drive mechanism that meets low cost requirements.

Disclosure of Invention

The utility model mainly aims to provide a driving mechanism of a circuit breaker and the circuit breaker, and aims to solve the problems in the prior art.

In order to achieve the above purpose, the utility model provides a driving mechanism of a circuit breaker, which comprises an electromagnetic driving piece and a transmission assembly;

the transmission assembly comprises a linkage piece and a movable piece;

one end of the linkage piece is rotatably connected to the electromagnetic driving piece and driven by the electromagnetic driving piece to rotate from a linkage stop position to a linkage actuation position;

the movable piece is rotatably connected to the other end of the linkage piece, and can rotate along with the rotation of the linkage piece or rotate around the other end of the linkage piece.

In some embodiments, the linkage member and the moveable member have the same plane of rotation.

In some embodiments, the transmission assembly further comprises a pin and a first elastic member, the pin and the first elastic member being rotatably connected to the other end of the linkage member by:

the pin connects the other end of the linkage piece with the movable piece;

the first elastic piece is sleeved on the pin, one rotating arm of the first elastic piece is attached to the linkage piece, and the other rotating arm is attached to the movable piece.

In some embodiments, a bending portion is disposed at an end of the movable member away from the linkage member, the movable member is in a hook shape in the rotation plane, and the first elastic member keeps the movable member in a tendency to open.

In some embodiments, the electromagnetic driver comprises a magnetic yoke, a baffle, and a plunger;

the baffle is arranged at one end of the magnetic yoke and forms an inner space with the magnetic yoke, a hole is formed in the middle of the baffle, and the movable iron core penetrates through the hole of the baffle and extends out of the inner space;

the magnetic yoke is provided with a fixing groove for embedding the two sides of the baffle.

In some embodiments, the magnetic yoke is provided with a semicircular groove outside the fixed groove _， One end of the linkage piece is provided with a linkage shaft which is assembled in the semicircular groove, so that the linkage piece can rotate around the axis of the linkage shaft;

the linkage piece is also provided with a perforation through which the movable iron core passes;

the movable iron core is configured to drive the linkage piece to rotate under the action of electromagnetic force.

In some embodiments, the electromagnetic drive further comprises a backbone, a core spring;

the movable iron core extends out of the inner space from the inside of the framework through the opening at one end of the framework and the direction of the baffle hole;

the iron core spring is sleeved on the movable iron core and penetrates through the baffle hole, one side of the iron core spring is leaned against the opening surface of the framework, and the other side of the iron core spring is clung to the linkage piece and does not exceed the linkage piece.

In some embodiments, the movable iron core has a movable iron core end cap at one end far away from the framework, and a rubber gasket is further sleeved on the movable iron core and is limited between the movable iron core end cap and the linkage piece.

In some embodiments, when the electromagnetic drive is activated, the plunger retracts and rotates the linkage from a linkage stop position to a direction proximate the yoke to a linkage actuation position;

when the electromagnetic driving piece is stopped, the linkage piece rotates to a linkage stop position from a linkage actuating position to a direction away from the magnetic yoke under the action of the iron core spring.

In addition, in order to achieve the above objective, the present utility model further provides a circuit breaker, including a driving mechanism and a switching assembly in any of the foregoing embodiments;

in the process that the linkage piece rotates to the linkage actuating position, the movable piece acts on the switching-on and switching-off assembly to realize switching-on or switching-off of the circuit breaker.

The circuit breaker driving mechanism comprises an electromagnetic driving piece and a transmission assembly, wherein one end of a linkage piece in the transmission assembly is rotatably connected to the electromagnetic driving piece and can rotate under the driving of the electromagnetic driving piece, and a movable piece in the transmission assembly is connected with the other end of the linkage piece and can rotate along with the rotation of the linkage piece and can also rotate around the other end of the linkage piece, so that the movable piece has various action modes.

According to the utility model, the through holes are formed in the linkage piece for the movable iron core to pass through, when the electromagnetic driving piece is started, the movable iron core is retracted, and the linkage piece is enabled to rotate from the linkage stop position to the direction close to the magnetic yoke to the linkage actuating position, so that the movable range of the linkage piece is closer to the electromagnetic driving piece, the occupied space of the driving mechanism is reduced, the occupied space of the driving mechanism is more regular, and the arrangement and the cooperation of other structures in the circuit breaker are facilitated.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered limiting the scope, and that other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

These exemplary embodiments will be described in detail with reference to the drawings. These exemplary embodiments are non-limiting exemplary embodiments, wherein reference numerals represent similar mechanisms throughout the several views of the drawings.

Fig. 1 is a circuit breaker opening state diagram according to some embodiments of the present application;

fig. 2 is a circuit breaker closing state diagram according to some embodiments of the present application;

FIG. 3 is a block diagram of an electromagnetic drive according to some embodiments of the present application;

FIG. 4 is a block diagram of a transmission assembly according to some embodiments of the present application;

fig. 5 is a block diagram of an assembled electromagnetic drive and transmission assembly according to some embodiments of the present application.

Icon: 1-an electromagnetic drive; 2-a transmission assembly; a 3-lock assembly; 4-a switching-on and switching-off assembly; 5-a base; 6-an operating mechanism; 11-a movable iron core; 111-moving core end caps; 12-a rubber gasket; 13-an iron core spring; 14-a baffle; 15-a magnetic yoke; 151-semi-circular grooves; 152-a fixed slot; 16-skeleton; 17-winding; 18-static iron core; 21-linkage; 211-a linkage body; 212-a linkage shaft; 213-linkage groove; 214-perforating; 22-pins; 23-a first elastic member; 24-moving part; 241-a moveable member groove; 242-moving part boss; 243—working surface; 41-a first button; 42-a second button; 61-a moving contact; 62-stationary contact.

Detailed Description

For the purposes of making the objects, technical solutions and advantages of the embodiments of the present application more clear, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments. The components of the embodiments of the present application, which are generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present application, as provided in the accompanying drawings, is not intended to limit the scope of the application, as claimed, but is merely representative of selected embodiments of the application. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present disclosure.

It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.

In the description of the present application, it should be noted that, if the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," "outer," and the like indicate an azimuth or a positional relationship based on that shown in the drawings, or an azimuth or a positional relationship that a product of the application conventionally puts in use, it is merely for convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element to be referred to must have a specific azimuth, be configured and operated in a specific azimuth, and thus should not be construed as limiting the present application. Furthermore, the terms "first," "second," and the like in the description of the present application, if any, are used for distinguishing between the descriptions and not necessarily for indicating or implying a relative importance.

Furthermore, the terms "horizontal," "vertical," and the like in the description of the present application, if any, do not denote a requirement that the component be absolutely horizontal or overhang, but rather may be slightly inclined. As "horizontal" merely means that its direction is more horizontal than "vertical", and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the present application, it should also be noted that, unless explicitly stated and limited otherwise, the terms "disposed," "mounted," "connected," and "connected" should be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art in a specific context.

As shown in fig. 1 and 2, the circuit breaker according to some embodiments of the present application is a plug-in circuit breaker, and includes an electromagnetic driving member 1, a transmission assembly 2, a locking assembly 3, a switching-on/off assembly 4, an operating mechanism 6, a moving contact 61, a fixed contact 62, and a base 5 for accommodating each component, and the circuit breaker is installed in a chassis. The transmission assembly 2 moves under the drive of the electromagnetic driving piece 1 and acts on the switching-on and switching-off assembly 4, and the switching-on and switching-off assembly 4, the operating mechanism 6 and the moving contact 61 are sequentially connected, so that the switching-on and switching-off assembly 4 drives the operating mechanism 6 to enable the moving contact 61 to be contacted with the fixed contact 62 (shown in figure 2) or separated from the fixed contact 62 (shown in figure 1), and switching-on or switching-off of the circuit breaker is realized.

For convenience of explanation of the circuit breaker shown in fig. 1 and 2, a space rectangular coordinate system is now established, wherein the left-right direction in the figure, i.e. the length direction of the circuit breaker, is taken as an X-axis, the right direction in the figure is taken as an X-axis positive direction, the up-down direction in the figure, i.e. the width direction of the circuit breaker, is taken as a Y-axis, the upward direction is taken as a Y-axis positive direction, and the outward direction perpendicular to the paper surface is taken as a Z-axis positive direction. The following figures and description follow the coordinate system, and fig. 3 and 5 are all XY plane views. It should be noted that the directions including up, down, left, right, front, back, etc. for explaining the structure and operation of the circuit breaker of the embodiment of the present application are not absolute methods, but relative directions, which may correctly correspond to the structural posture shown in the drawings, but when the structural posture is changed, these directions need to be interpreted correspondingly to be changed to accommodate such structural posture change.

As shown in fig. 3, the electromagnetic driver 1 includes a movable iron core 11, a rubber washer 12, an iron core spring 13, a shutter 14, a yoke 15, a bobbin 16, a winding 17, and a stationary iron core 18. The baffle 14 is located at one end of the yoke 15 and encloses an inner space with the yoke 15, and the frame 16 is disposed in the inner space. The middle part of the baffle 14 is provided with a hole, one end of the magnetic yoke 15 far away from the baffle 14 is provided with an opening, the framework 16 is of a hollow structure with openings at two ends, and the outer surface of the framework 16 is sleeved with a winding 17. The movable iron core 11 extends out of an inner space enclosed by the baffle 14 and the magnetic yoke 15 from the inside of the framework 16 through an opening at one end of the framework 16 and the hole direction of the baffle 14, and the movable iron core 11 can move in the direction; the stationary core 18 is fixed by extending from the inside of the frame 16 through the opening at the other end of the frame 16 and the opening direction of the yoke 15 at the end far from the baffle 14. The magnet yoke 15 is provided with a fixing groove 152 for embedding two sides of the baffle 14, and the magnet yoke 15 is further provided with a semicircular groove 151 outside the fixing groove 152. On the one hand, the baffle 14 and the magnet yoke 15 cooperate to fix the skeleton 16 at a relative position inside the magnet yoke 15, and on the other hand, the baffle 14 helps the overall magnetic circuit to be closed loop, increasing electromagnetic force. The iron core spring 13 is sleeved on the movable iron core 11 and penetrates through the hole of the baffle plate 14, and one side of the iron core spring 13 is leaned against the opening surface of the framework 16. The movable iron core 11 is provided with a movable iron core end cap 111 at one end far away from the framework 16, the movable iron core 11 is also sleeved with a rubber gasket 12, the rubber gasket 12 is limited between the movable iron core end cap 111 and the iron core spring 13, and the movable iron core end cap 111 can prevent the rubber gasket 12 from falling out.

As shown in fig. 4, the transmission assembly 2 includes a linkage 21, a pin 22, a first elastic member 23, and a movable member 24. One end of the linkage member 21 is rotatably connected to the electromagnetic driving member 1: the linkage member 21 includes a linkage member body 211, one end of the linkage member body 211 is connected with a linkage shaft 212, and the linkage shaft 212 is assembled in the semicircular groove 151 of the electromagnetic driving member and can enable the linkage member 21 to freely rotate around the axis of the linkage shaft 212. The linkage body 211 is provided with a through hole 214, and the through hole 214 allows the movable iron core 11 to pass through and drive the linkage 21 to rotate along the first time needle direction (clockwise rotation from C to D in fig. 5). The middle part of the other end of the linkage member body 211 is provided with a linkage member groove 213, and two sides of the linkage member groove 213 are provided with lugs. One end of the movable member 24 has a movable member groove 241, and both sides of the movable member groove 241 have ears. The pin 22 is used to connect the other end of the link 21 with the movable member 24, which is substantially parallel to the link shaft 212 and passes through the ear of the link 21 and the ear of the movable member 24, so that the movable member 24 is rotatably connected to the other end of the link 21, as shown in fig. 5, and the rotation plane of the movable member 24 is the same plane as the rotation plane of the link 21, i.e., the plane shown in fig. 5. The end of the movable member 24 away from the linkage member 21 is provided with a bending portion, and the bending portion bends towards the first time needle direction, so that the movable member 24 is in a hook shape in a rotation plane, as shown in fig. 4, the tail end of the bending portion is provided with a working surface 243 and a movable member boss 242 extending along a direction perpendicular to the rotation plane, and the extending direction of the movable member boss 242 (not shown in fig. 5) is perpendicular to the plane in fig. 5 and points into the paper (i.e. the opposite direction of the third direction). As shown in fig. 4, the first elastic member 23 is a torsion spring, and is sleeved on the pin 22, one rotating arm of the first elastic member 23 is attached in the linkage member groove 213 of the linkage member 21, and the other rotating arm is attached in the movable member groove 241 of the movable member 24, so that the movable member 24 keeps a tendency to rotate around the other end of the linkage member 21 in a second clockwise direction opposite to the first time needle (counterclockwise rotation from D to C in fig. 5), that is, the movable member 24 keeps a tendency to open. The movable member 24 may be displaced by the rotation of the linkage member 21, or may be repositionably rotated about the other end of the linkage member 21, that is, the movable member 24 may be repositionably rotated about the joint.

As shown in fig. 5, the electromagnetic driving member 1 and the transmission assembly 2 are assembled as a unit, i.e., a driving mechanism, and the link member 21 is driven by the electromagnetic driving member 1 to rotate from the link stop position to the link actuation position. The plunger 11 passes through the through hole 214 of the linkage 21, one side of the plunger spring 13 is abutted against the opening surface of the frame 16, and the other side of the plunger spring 13 is abutted against the linkage 21 and does not pass over the linkage 21. The rubber gasket 12 is limited between the movable iron core end cap 111 and the linkage piece 21, so that damage caused by direct contact between the movable iron core 11 and the linkage piece 21 is avoided, and the damping effect is achieved. As shown in fig. 1 and 2, after the electromagnetic drive assembly is fixed inside the circuit breaker, the housing (not labeled in fig. 1 and 2) of the head spacer 32 restricts the movable iron core 11 to the left-hand limit position in the drawing, i.e., the drive stop position; the linkage 21 then limits the right-hand limit position of the plunger 11 in the drawing, i.e. the drive actuation position, by limiting the plunger end cap 111.

As shown in fig. 1, 2 and 5, when the winding 17 is energized and the electromagnetic driver 1 is started, the plunger 11 is retracted rightward (from a to B) from the drive stop position to the drive actuation position by the electromagnetic force; during the retraction process of the movable iron core 11, the movable iron core end cap 111 drives the rubber gasket 12 to act on the linkage piece 21, so that the linkage piece 21 rotates from a linkage stop position to a linkage actuation position in a direction close to the magnetic yoke 15 under the drive of the electromagnetic driving piece 1, namely, rotates from the linkage stop position to the linkage actuation position along a first time needle direction (clockwise rotation from C to D in fig. 5), and under the drive of the linkage piece 21, the movable piece 24 presses the first button 41 or the second button 42 of the switching-on and switching-off assembly 4 in the action process, so that switching-on or switching-off of the circuit breaker is realized. When the winding 17 is powered off and the electromagnetic driving member 1 stops, the iron core spring 13 provides a resilience force for the linkage member 21, and the linkage member 21 rotates from the linkage actuating position to the linkage stopping position in a direction away from the magnetic yoke under the action of the iron core spring 13, namely, rotates from the linkage actuating position to the linkage stopping position in a second clockwise direction opposite to the first time needle (anticlockwise rotation from D to C in fig. 5), and the movable member 24 is reset under the drive of the linkage member 21; at the same time, the link 21 acts on the plunger 11 through the rubber washer 12, thereby driving the plunger 11 to return to the drive stop position as well.

In this embodiment, one end of the linkage member 21 is rotatably connected to the electromagnetic driving member 1, but it should be noted that, as a feasible manner that the movable member 24 is movably connected to the electromagnetic driving member 1, the rotatable end of the linkage member 21 may also be connected to other components and/or positions in the circuit breaker, so long as it is satisfied that the linkage member 21 can rotate around one end between the linkage stop position and the linkage actuating position under the driving of the electromagnetic driving member 1, and drives the movable member 24 to implement the closing or opening of the circuit breaker.

The foregoing description is only of the preferred embodiments of the present application and is not intended to limit the same, but rather, various modifications and variations may be made by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims (10)

1. A drive mechanism of a circuit breaker, characterized by comprising an electromagnetic drive (1), a transmission assembly (2);

the transmission assembly (2) comprises a linkage piece (21) and a movable piece (24);

one end of the linkage piece (21) is rotatably connected to the electromagnetic driving piece (1) and driven by the electromagnetic driving piece (1) to rotate from a linkage stop position to a linkage actuation position;

the movable piece (24) is rotatably connected to the other end of the linkage piece (21), and the movable piece (24) can move along with the rotation of the linkage piece (21) and can also rotate around the other end of the linkage piece (21).

2. A drive mechanism according to claim 1, wherein the linkage member (21) and the movable member (24) have the same plane of rotation.

3. The drive mechanism according to claim 2, wherein the transmission assembly (2) further comprises a pin (22) and a first elastic member (23), the first elastic member (23) being a torsion spring, the pin (22) and the first elastic member (23) being rotatably connected to the other end of the linkage member (21) by:

the pin (22) connects the other end of the linkage piece (21) with the movable piece (24);

the first elastic piece (23) is sleeved on the pin (22), one rotating arm of the first elastic piece (23) is attached to the linkage piece (21), and the other rotating arm is attached to the movable piece (24).

4. A driving mechanism as claimed in claim 3, characterized in that the end of the movable member (24) remote from the linkage member (21) is provided with a bent portion, the movable member (24) is in the form of a hook in the rotation plane, and the first elastic member (23) keeps the movable member (24) in a tendency to open.

5. The drive mechanism according to any one of claims 1 to 4, wherein the electromagnetic drive (1) comprises a yoke (15), a baffle (14), a plunger (11);

the baffle (14) is arranged at one end of the magnet yoke (15) and forms an inner space with the magnet yoke (15), a hole is formed in the middle of the baffle (14), and the movable iron core (11) passes through the hole of the baffle (14) and extends out of the inner space;

the magnetic yoke (15) is provided with a fixing groove (152) for embedding two sides of the baffle (14).

6. The drive mechanism as claimed in claim 5, characterized in that the yoke (15) is provided with a half-open circular groove (151) outside the fixing groove (152) _， One end of the linkage piece (21) is provided with a linkage shaft (212), and the linkage shaft (212) is assembled in the semicircular groove (151) so that the linkage piece (21) can rotate around the axis of the linkage shaft (212);

the linkage piece (21) is also provided with a perforation (214), and the perforation (214) is used for the movable iron core (11) to pass through;

the movable iron core (11) is configured to drive the linkage piece (21) to rotate under the action of electromagnetic force.

7. The drive mechanism according to claim 5, wherein the electromagnetic drive (1) further comprises a skeleton (16), a core spring (13);

the movable iron core (11) extends out of the inner space from the inside of the framework (16) through the opening at one end of the framework (16) and the hole direction of the baffle (14);

the iron core spring (13) is sleeved on the movable iron core (11) and penetrates through the hole of the baffle plate (14), one side of the iron core spring (13) is leaned against the opening surface of the framework (16), and the other side of the iron core spring is clung to the linkage piece (21) and does not exceed the linkage piece (21).

8. The driving mechanism as claimed in claim 7, wherein a movable core end cap (111) is provided at an end of the movable core (11) remote from the frame (16), a rubber gasket (12) is further provided on the movable core (11), and the rubber gasket (12) is restrained between the movable core end cap (111) and the linkage member (21).

9. The drive mechanism according to claim 8, wherein when the electromagnetic drive (1) is activated, the plunger (11) is retracted and rotates the link (21) from a linked stop position to a direction approaching the yoke (15) to a linked actuation position;

when the electromagnetic driving member (1) is stopped, the linkage member (21) rotates from a linkage actuating position to a linkage stopping position in a direction away from the magnetic yoke (15) under the action of the iron core spring (13).

10. A circuit breaker, characterized in that it comprises a drive mechanism, a closing and opening assembly (4) according to any one of claims 1 to 9;

in the process that the linkage piece (21) rotates to the linkage actuating position, the movable piece (24) acts on the switching-on and switching-off assembly (4) to realize switching-on or switching-off of the circuit breaker.

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