CN217008981U - Interlocking mechanism and switch cabinet comprising same - Google Patents

Abstract

The present disclosure relates to an interlock mechanism and a switchgear including the same. The interlock mechanism includes: the push plate (4) is movably arranged on the chassis (3) and connected to the opening button (32) to move along a first direction under the driving of the opening button (32); a linkage mechanism (5) with one end connected to the push plate (4) and the other end connected to the opening half shaft, and configured to drive the opening half shaft to rotate between an opening position and a closing position under the driving of the push plate (4); and an operation hole cover plate (6) pivotally connected to the chassis (3) and movable between a closed position where the operation hole (31) is shielded and an open position where the operation hole (31) is opened.

Description

Interlocking mechanism and switch cabinet comprising same

Technical Field

The utility model relates to an interlocking mechanism and a switch cabinet comprising the same.

Background

The switch cabinet is a transmission and distribution electrical device, and refers to a device which is opened, closed, controlled and protected in the process of power generation, power transmission, power distribution and electric energy conversion of a power system. The switchgear cabinet houses electrical protection equipment such as circuit breakers.

From safe angle, when requiring the circuit breaker to be in the switch-on state, the chassis car is not allowed to shake in and out the operation, and only the circuit breaker is in the separating brake state, and the chassis car just can shake in and out. Most of the existing chassis interlocking mechanisms limit the rotation of a screw rod of a chassis, so that the shaking-in and shaking-out operation of the chassis is limited. However, the interlocking mode has high requirements on the matching of the chassis and the interlocking part, and the interlocking failure is easy to occur. Meanwhile, as the mode belongs to physical forced locking, the interlock and the chassis are easy to damage if forced shake-in and shake-out operation is met.

In addition, in some cases, the contacts may be welded, which means that the moving contact and the fixed contact are melted due to high temperature and thus connected together and cannot be separated. Because the operating mechanism is linked with the contact, when the moving contact and the static contact are welded and cannot be separated, the operating mechanism cannot be opened in place. After fusion welding occurs, the operating mechanism can be clamped between the switching-on position and the switching-off position, so that the operating mechanism cannot completely disconnect the primary electrified loop. The forced operation of the chassis vehicle at this time can harm the personal safety.

In view of the foregoing, there is a need for an interlock mechanism to ensure safe performance of a chassis shake-in and shake-out operation.

SUMMERY OF THE UTILITY MODEL

In view of the above-mentioned problems and needs, the present invention provides a novel interlock mechanism and a switch cabinet including the same, which solve the above-mentioned problems and bring other technical effects due to the following technical features.

In one aspect, the utility model provides an interlocking mechanism for realizing interlocking and unlocking between a chassis and a circuit breaker, wherein the circuit breaker comprises a shell, a switching-off half shaft and an operating mechanism, the switching-off half shaft is arranged on the shell and realizes a switching-off function, the operating mechanism is used for actuating switching-off and switching-on operations, and the chassis comprises an operating hole and a switching-off button, the operating hole is used for receiving a crank handle, and the switching-off button is connected and used for actuating the interlocking mechanism. The interlock mechanism includes: the push plate is movably arranged on the chassis truck and connected to the opening button so as to move along a first direction under the driving of the opening button; the linkage mechanism is connected with the push plate at one end and the opening half shaft at the other end, and is configured to drive the opening half shaft to rotate between an opening position and a closing position under the driving of the push plate; and an operation hole cover plate movably connected to the chassis truck and capable of linearly moving between a closed position where the operation hole is shielded and an open position where the operation hole is opened.

When the opening button is not pressed down, the operation hole cover plate is located at the closed position, the opening button is completely pressed down, the push plate moves along the first direction and drives the opening half shaft to rotate to the opening position, and the operation hole cover plate is driven to move to the opening position along the second direction perpendicular to the first direction.

In some examples, the interlock mechanism further includes an intermediate plate hinged to the chassis truck through a hinge point, and the intermediate plate includes first and second positioning posts disposed on both sides of the hinge point, respectively.

In some examples, the push plate comprises a first waist-shaped hole, the operation hole cover plate comprises a second waist-shaped hole, the first positioning column is arranged in the first waist-shaped hole, and the second positioning column is arranged in the second waist-shaped hole, so that the push plate is driven to pivot around a hinge point along the movement of the first direction, and then the operation hole cover plate is driven to move along the second direction.

In some examples, the push plate further includes a push plate main body extending in the first direction and an actuating portion extending perpendicular to the push plate main body, the opening button is connected to the actuating portion, and the first kidney-shaped hole is provided on the actuating portion and extends in the second direction.

In some examples, the operation hole cover further includes a cover main body extending in a second direction and a connection portion extending perpendicular to the cover main body, and the second kidney-shaped hole is provided on the connection portion and extends in the first direction.

In some examples, the cover main body is provided with a through hole which is staggered from the operation hole in the closed position, the cover main body shields the operation hole, and the through hole is aligned with the operation hole in the open position to open the operation hole.

In some examples, the linkage includes a strut movably connected to the housing and including opposing first and second ends, the first end connected to the housing by a spring and the second end hinged to the drive wheel.

In some examples, the push plate includes a first surface extending in the first direction, a second surface higher than the first surface, and a ramp connecting the first surface and the second surface, the drive wheel presses against the push plate and presses against the first surface, the ramp, and the second surface, respectively, as the push plate moves in the first direction.

In some examples, the strut further comprises a limit pin disposed perpendicular to the strut and fixedly connected with the strut, the limit pin disposed in a vertically extending kidney-shaped hole of the housing to enable the strut to move in a vertical direction relative to the housing.

In some examples, the interlock mechanism further includes a fusion welding limiting plate hinged to the housing and disposed above the driving wheel, and connected to the operating mechanism and rotated with closing and opening of the operating mechanism.

In some examples, a side of the welding limiting plate close to the driving wheel is provided with a limiting part to limit the movement of the limiting pin in the vertical direction when the operating mechanism is switched on or welding occurs, so as to limit the stroke of the opening button, so that the operating hole cannot be opened.

In some examples, the stopper portion has a hook portion. When the operating mechanism is switched on or fusion welding occurs, the hook part abuts against the limiting pin, so that the driving wheel cannot move to the second surface along the inclined surface, the stroke of the brake separating button is limited, and the operating hole cannot be opened. When the operating mechanism is used for opening the brake, the hook part and the limiting pin are staggered, so that the driving wheel can move to the second surface along the inclined surface, and the brake opening button can be completely pressed down to open the operating hole.

In some examples, the linkage mechanism further comprises a multi-link mechanism and an interlocking plate, one end of the multi-link mechanism is connected to the first end of the supporting rod, the other end of the multi-link mechanism is connected to the interlocking plate, at least one interlocking plate kidney-shaped hole is arranged on the interlocking plate, the at least one interlocking plate kidney-shaped hole extends along the vertical direction and is movably connected with the shell through a bolt, and the multi-link mechanism drives the interlocking plate to move along the vertical direction under the driving of the supporting rod.

In some examples, the linkage mechanism further comprises an intermediate swing arm, one end of the intermediate swing arm is hinged to the housing, and the other end of the intermediate swing arm is a free end and is connected to the interlocking plate, so that the intermediate swing arm is driven to rotate when the interlocking plate moves in the vertical direction.

In some examples, the opening half shaft comprises a cam fixedly arranged on the opening half shaft, and the cam is connected with the free end of the middle swing arm so as to transmit the rotation of the middle swing arm to the opening half shaft.

In some examples, the multi-link mechanism is a three-link mechanism.

In another aspect, the utility model provides a switch cabinet, which includes a chassis, a circuit breaker disposed on the chassis, and an interlock mechanism as described above.

The technical scheme of the utility model has the beneficial effects that: the interlocking mechanism links the opening operation with the operation hole, prevents the crank from entering the operation hole when the switch is switched on or the contact is in a fusion welding state, avoids interlocking failure caused by forcibly shaking the chassis in and out under the incomplete opening state, and can prevent the contact from being forcibly shaken out to damage personal safety when the contact is in a fusion welding state and the normal opening is caused. The interlocking mechanism is simple and reliable in structure, meets the safety requirement, and has remarkable cost benefit.

Drawings

To more clearly illustrate the technical solutions of the embodiments of the present disclosure, the drawings of the embodiments will be briefly introduced below, and it is apparent that the drawings in the following description relate only to some embodiments of the present disclosure and are not limiting to the present disclosure.

Fig. 1 is a partial perspective view of a switchgear in a closed position according to an embodiment of the present disclosure;

FIG. 2 is a partial schematic view of an interlock mechanism according to an embodiment of the disclosure;

fig. 3A is a side view of a switchgear of an embodiment of the present disclosure in a closed position;

FIG. 3B is an enlarged partial view of FIG. 3A with the drive wheel of the linkage abutting the first surface;

FIG. 3C shows a close-up view of FIG. 3A from another perspective, with the operator access panel in a closed position;

FIG. 3D shows a schematic view of an embodiment of the present disclosure with the access hole fully obscured;

fig. 4A is a side view of a switchgear of an embodiment of the present disclosure in an open position;

FIG. 4B is an enlarged partial view of FIG. 4A with the drive wheel of the linkage abutting the second surface;

FIG. 4C shows a close-up view of FIG. 4A from another perspective, with the access panel in an open position;

FIG. 4D shows a schematic view of an embodiment of the present disclosure with the access hole open;

FIG. 5A is a side view of a switchgear cabinet of an embodiment of the present disclosure in a fusion welded state;

FIG. 5B shows a close-up view of FIG. 4A with the access panel in an intermediate position between the open and closed positions;

fig. 5C shows a schematic view of an embodiment of the present disclosure when the access hole is not fully open.

List of reference numerals

1 breaking half shaft

11 cam

2 operating mechanism

3 chassis vehicle

31 operation hole

32 switching-off button

4 push plate

41 first waist-shaped hole

42 push plate body

43 actuator part

44 first surface

45 second surface

46 bevel

5 linkage mechanism

51 support rod

511 first end

512 second end

513 spacing pin

52 drive wheel

53 spring

6 operation hole cover plate

61 second waist-shaped hole

62 cover main body

63 connection part

64 through hole

7 middle plate

71 first positioning column

72 second positioning column

8 waist-shaped hole

9 fusion welding limiting plate

91 hook part

10 multi-link mechanism

20 interlocking plates

201 interlocking plate kidney-shaped hole

30 bolt

40 middle swing arm

50 lead screw

M hinge point

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present disclosure more clear, the embodiments of the present disclosure will be described in detail and completely with reference to the accompanying drawings of specific embodiments of the present disclosure. Like reference numerals in the drawings denote like elements. It should be noted that the described embodiments are only some of the embodiments of the present disclosure, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the described embodiments of the disclosure without any inventive step, are within the scope of protection of the disclosure.

Unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this disclosure belongs. The use of "first," "second," and similar terms in the description and claims of the present disclosure are not intended to indicate any order, quantity, or importance, but rather are used to distinguish one element from another. Also, the use of the terms "a" or "an" and the like do not necessarily denote a limitation of quantity. The word "comprising" or "comprises", and the like, means that the element or item preceding the word comprises the element or item listed after the word and its equivalent, but does not exclude other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", and the like are used merely to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships may also be changed accordingly.

Most of the existing chassis interlocking mechanisms limit the rotation of a screw rod of a chassis, so that the shaking-in and shaking-out operation of the chassis is limited. However, the interlocking mode has high requirements on the matching of the chassis and the interlocking part, and the interlocking failure is easy to occur. Meanwhile, as the mode belongs to physical forced locking, the interlock and the chassis are easy to damage if forced shake-in and shake-out operations are met. Therefore, there is a need for an interlock mechanism to ensure safe performance of the chassis roll-in and roll-out operation.

In view of the above problems and needs, the interlock mechanism and the switch cabinet having the same of the present disclosure are provided.

Preferred embodiments of the interlock mechanism according to the present disclosure will be described in detail below with reference to the accompanying drawings. Fig. 1 is a partial perspective view of the switchgear in a closed position according to an embodiment of the present disclosure in fig. 1. Fig. 2 is a partial schematic view of an interlock mechanism according to an embodiment of the disclosure. Fig. 3A is a side view of a switchgear of an embodiment of the present disclosure in a closed position. Fig. 3B is a partial enlarged view of fig. 3A with the drive wheel of the linkage abutting the first surface. Fig. 3C shows a close-up view of fig. 3A from another perspective, with the operator access panel in a closed position. Fig. 3D shows a schematic view of an embodiment of the present disclosure with the access hole fully obscured. Fig. 4A is a side view of a switchgear of an embodiment of the present disclosure in an open position. Fig. 4B is a partial enlarged view of fig. 4A with the drive wheel of the linkage abutting the second surface. Fig. 4C shows a close-up view of fig. 4A from another perspective, with the access panel in an open position. Fig. 4D shows a schematic view of the operation hole of the embodiment of the present disclosure when opened. Fig. 5A is a side view of a switchgear cabinet of an embodiment of the present disclosure in a welded state. Fig. 5B shows a partial enlarged view of fig. 4A with the operating aperture plate in an intermediate position between the open and closed positions. Fig. 5C shows a schematic view of an embodiment of the present disclosure when the access hole is not fully open.

Possible embodiments within the scope of the disclosure may have fewer components, have other components not shown in the figures, different components, differently arranged components or differently connected components, etc. than the embodiments shown in the figures. Further, two or more of the components in the drawings may be implemented in a single component, or a single component shown in the drawings may be implemented as multiple separate components, without departing from the concepts of the present disclosure.

For ease of description, the drawings of the present disclosure correspondingly simplify or omit components commonly used in the art, such as the housing of the circuit breaker, the chassis assembly, and other components. These omitted or simplified components do not affect the understanding of the present disclosure by those skilled in the art.

The interlocking mechanism provided by the embodiment of the disclosure is used for realizing interlocking and unlocking between the chassis 3 and the circuit breaker, the circuit breaker comprises a shell, a switching-off half shaft 1 which is arranged on the shell and realizes a switching-off function, and an operating mechanism 2 for actuating switching-off and switching-on operations, and the chassis 3 comprises an operating hole 31 for receiving a crank and a switching-off button 32 which is connected and used for actuating the interlocking mechanism.

Referring first to fig. 1 to 4D, the interlock mechanism includes: push plate 4, link gear 5, operation aperture apron 6 and intermediate plate 7.

The push plate 4 is movably disposed on the chassis 3 and connected to the opening button 32 to move in a first direction D1 under the driving of the opening button 32, as shown in fig. 4A and 4C. It should be noted that the figures of the present disclosure do not show the connecting part between the opening button 32 and the push plate 4 for simplicity, and those skilled in the art can understand that various connecting ways can be adopted to realize the same-direction driving motion between the opening button 32 and the push plate 4, such as rigid connection or elastic connection through an elastic member.

The linkage mechanism 5 has one end connected to the push plate 4 and the other end connected to the opening half shaft 1, and is configured to drive the opening half shaft to rotate between an opening position and a closing position under the driving of the push plate 4.

The operation hole cover 6 is movably connected to the chassis frame 3 and is linearly movable between a closed position, at which the operation hole 31 is shielded, and an open position, at which the operation hole 31 is opened.

When the opening button 32 is not pressed, the operation hole cover plate 6 is in a closed position, the opening button 32 is fully pressed, the push plate 4 moves along the first direction D1 and drives the opening half shaft 1 to rotate to an opening position, and the operation hole cover plate 6 is driven to move to an opening position along a second direction D2 which is perpendicular to the first direction D1.

It should be noted that, in the present disclosure, the "pressing the opening button completely" refers to pressing the opening button 32 to the bottom, i.e., the extreme position along the first direction D1. In other words, the operation hole cover 6 can be in the open position only by pressing the opening button 32 to the bottom, and the operation hole 31 is fully opened to enable the user to insert the crank for the shake-in and shake-out operation. On the contrary, if the opening button is not pressed down, or the opening button is only pressed down to travel a short distance and does not reach the limit position, at this time, the operation hole 31 is not completely opened, the operation hole cover plate 6 still covers the operation hole 31, and the crank cannot be inserted for the shake-in and shake-out operation.

Illustratively, the operation hole 31 is aligned with the screw 50, and thus, as shown in fig. 4C, the operation hole cover 6 may be provided with a through hole 64. In the closed position, the through hole 64 is misaligned with the operation hole 31, and the operation hole cover 6 thus shields the operation hole 31, as shown in fig. 3D.

As shown in fig. 4D, in the open position, the through hole 64 is aligned with the operation hole 31 to open the operation hole 31, so that the user can extend the crank into the operation hole to drive the screw to rotate, thereby realizing the shake-in and shake-out operation.

Further, the middle plate 7 may be hinged to the chassis 3 through a hinge point M, and the middle plate 7 includes a first positioning column 71 and a second positioning column 72, the first positioning column 71 and the second positioning column 72 being respectively disposed at both sides of the hinge point M. By providing the intermediate plate 7, the linear motion of the push plate 4 in the first direction D1 is converted into the linear motion in the second direction D2 perpendicular to the first direction D1.

For example, the push plate 4 may include a first kidney-shaped hole 41, and the operation hole cover 6 may include a second kidney-shaped hole 61. The first positioning column 71 is disposed in the first kidney-shaped hole 41, and the second positioning column 72 is disposed in the second kidney-shaped hole 61, so that the movement of the push plate 4 in the first direction D1 drives the intermediate plate 7 to pivot about the hinge point M, and thus drives the operation hole cover plate 6 to move in the second direction D2.

In the present embodiment, the push plate 4 may further include a push plate main body 42 extending in the first direction D1 and an actuating portion 43 extending perpendicular to the push plate main body 42, the opening button 32 is connected to the actuating portion 43, and the first kidney-shaped hole 41 is provided on the actuating portion 43 and extends in the second direction D2.

Further, the operation hole cover 6 may further include a cover main body 62 extending in the second direction D2 and a connection portion 63 extending perpendicularly to the cover main body 62, and the second kidney-shaped hole 61 is provided on the connection portion 63 and extends in the first direction D1.

As before, the cover main body 62 may be provided with a through hole 64, in the closed position, the through hole 64 is misaligned with the operation hole 31, the cover main body 62 shields the operation hole 31, and in the open position, the through hole 64 is aligned with the operation hole 31 to open the operation hole 31.

The linkage mechanism 5 is used for converting the motion of the push plate 4 along the first direction D1 into the rotation of the opening half shaft 1. Illustratively, as shown in fig. 3B and 4B, the linkage mechanism 5 may include a strut 51, a drive wheel 52, and a spring 53, the strut 51 being movably connected to the housing, and the strut 51 including opposite first and second ends 511 and 512, the first end 511 being connected to the housing by the spring 53, the second end 512 being hinged to the drive wheel 52.

Accordingly, as shown in figures 3A, 4A, and 5A, the push plate 4 can include a first surface 44 extending in the first direction D1, a second surface 45 higher than the first surface 44, and a ramp 46 connecting the first surface 44 and the second surface 45, with the drive wheel 52 pressing against the push plate 4 and the first surface 44, the ramp 46, and the second surface 45, respectively, as the push plate 4 moves in the first direction D1.

The strut 51 may further comprise a limit pin 513, the limit pin 513 being arranged perpendicular to the strut 51 and fixedly connected to the strut 51, the limit pin 513 being arranged in a kidney-shaped hole 8 of the housing extending in the vertical direction Z to enable the strut 51 to move in the vertical direction Z relative to the housing.

In addition, in some cases, the contacts may be welded and cannot be separated, and the operating mechanism cannot be opened. After fusion welding occurs, the operating mechanism can be clamped between the switching-on position and the switching-off position, so that the operating mechanism cannot completely disconnect the primary electrified loop. This forced operation of the chassis vehicle can harm personal safety. It is therefore also necessary to restrict the swing-in and swing-out operation in the welded state.

As shown in fig. 1, 3A, 4A and 5A, the interlocking mechanism may further include a welding limiting plate 9, and the welding limiting plate 9 is hinged to the housing and disposed above the driving wheel 52, and connected to the operating mechanism 2 and rotated with the closing and opening of the operating mechanism 2. The welding stopper plate 9 is provided with a stopper portion at a side thereof adjacent to the driving wheel 52 to restrict the movement of the stopper pin 513 in the vertical direction Z when the actuator 2 is closed or welding occurs, thereby restricting the stroke of the opening button 32 so that the operation hole 31 cannot be opened.

Illustratively, the stopper portion has a hook portion 91 for restricting movement of the stopper pin. Therefore, when the operating mechanism 2 is switched on or welding occurs, the operating mechanism 2 is switched on or cannot be switched off completely, and therefore the welding limiting plate 9 does not rotate or cannot rotate completely until the hook 91 is staggered with the limiting pin 513. The hook 91 abuts against the stopper pin 513, so that the driving wheel 52 cannot move to the second surface 45 along the inclined surface 46, thereby limiting the stroke of the trip button 32, so that the operation hole 31 cannot be opened.

Referring to fig. 3A to 3D, when the operating mechanism 2 is closed, the cover main body 62 of the operating hole cover 6 completely covers the operating hole 31, so that the operating hole 31 cannot be opened and the crank cannot be inserted.

Referring to fig. 5A to 5C, when fusion welding occurs in the operating mechanism 2, the cover main body 62 of the operation hole cover 6 partially shields the operation hole 31, and also the operation hole 31 cannot be opened and the crank cannot be inserted.

Conversely, when the operating mechanism 2 is opened, the hook portion 91 is misaligned with the stopper pin 513, so that the driving wheel 52 can move along the inclined surface 46 to the second surface 45, and the opening button 32 can be fully pressed to open the operating hole 31, see fig. 4A to 4D.

Therefore, through the interlocking mechanism provided by the disclosure, the operating mechanism 2 shields the operating hole 31 through the operating hole cover plate 6 during opening, so that the crank is prevented from entering the operating hole 31, interlocking or failure of the chassis 3 caused by forcibly shaking in and out the chassis 3 in a closing state is avoided, and the operating mechanism 2 shields a part of the operating hole 31 through the operating hole cover plate 6 in a fusion welding state, so that the crank can be prevented from entering the operating hole 31, and damage to the operating mechanism 2 or personal safety caused by forced shaking in and out operation when the contact fusion welding leads to failure in normal opening can be prevented.

As regards the structure of the transmission of the linkage 5 from the strut 51 to the opening half shaft 1, a plurality of transmission means can be used. Illustratively, in an alternative embodiment of the present disclosure, as shown in fig. 1-4A, the linkage mechanism 5 may further include a multi-link mechanism 10, an interlocking plate 20, and an intermediate swing arm 40.

The multi-link mechanism 10 has one end connected to the first end 511 of the support rod 51 and the other end connected to the interlocking plate 20, the interlocking plate 20 is provided with at least one interlocking plate kidney-shaped hole 201, the at least one interlocking plate kidney-shaped hole 201 extends along the vertical direction Z and is movably connected with the housing through a bolt 30, and the multi-link mechanism 10 drives the interlocking plate 20 to move along the vertical direction Z under the driving of the support rod 51.

One end of the intermediate swing arm 40 is hinged to the housing and the other end is a free end and is connected to the interlocking plate 20 so that the intermediate swing arm 40 is driven to rotate when the interlocking plate 20 moves in the vertical direction Z.

Correspondingly, the opening half shaft 1 may include a cam 11 fixedly disposed on the opening half shaft 1, the cam 11 being connected with a free end of the intermediate swing arm 40 to transmit rotation of the intermediate swing arm 40 to the opening half shaft 1.

Alternatively, as shown in fig. 1 and 2, the multi-link mechanism 10 is a three-link mechanism.

The embodiment of the present disclosure also provides a switch cabinet, including: the circuit breaker of chassis car, setting up on the chassis car and interlocking device as before.

Alternatively, the circuit breaker may be a medium-high voltage circuit breaker, a low voltage circuit breaker, or other circuit breakers common in the art.

In summary, embodiments of the present invention provide an interlocking mechanism for a switch cabinet and a switch cabinet including the same, where the interlocking mechanism connects a switching-off operation with an operation hole, and prevents a crank from entering the operation hole when a switch-on or contact is in a fusion welding state, so as to avoid an interlocking failure caused by forcibly shaking a chassis into and out of the chassis in an incomplete switching-off state, and prevent the contact from being in fusion welding to cause the forced shaking-off of the chassis when the switch cannot be normally switched off, thereby endangering personal safety. The interlocking mechanism is simple and reliable in structure, meets the safety requirement, and has remarkable cost benefit.

The above description is only for the specific embodiments of the present disclosure, but the scope of the embodiments of the present disclosure is not limited thereto, and any person skilled in the art can easily conceive of the changes, substitutions or combinations within the technical scope of the embodiments of the present disclosure or under the concept of the embodiments of the present disclosure, and all of them should be covered by the scope of the embodiments of the present disclosure.

Claims (17)

1. An interlocking mechanism for realizing interlocking and unlocking between a chassis (3) and a circuit breaker, the circuit breaker comprises a shell, an opening half shaft (1) arranged on the shell for realizing opening function and an operating mechanism (2) for actuating opening and closing operation, the chassis (3) comprises an operating hole (31) for receiving a crank handle and an opening button (32) connected and used for actuating the interlocking mechanism, and the interlocking mechanism is characterized by comprising:

the push plate (4) is movably arranged on the chassis (3) and is connected to the opening button (32) so as to move along a first direction (D1) under the driving of the opening button (32);

a linkage mechanism (5) with one end connected to the push plate (4) and the other end connected to the opening half shaft (1), and configured to drive the opening half shaft to rotate between an opening position and a closing position under the driving of the push plate (4); and

an operation aperture cover (6) movably connected to the chassis (3) and linearly movable between a closed position at which the operation aperture (31) is shielded and an open position at which the operation aperture (31) is opened,

when the opening button (32) is not pressed, the operation hole cover plate (6) is in a closed position, the opening button (32) is fully pressed, the push plate (4) moves along a first direction (D1) and drives the opening half shaft (1) to rotate to an opening position, and the operation hole cover plate (6) is driven to move to an opening position along a second direction (D2) which is perpendicular to the first direction (D1).

2. Interlocking mechanism according to claim 1, characterized in that it further comprises an intermediate plate (7), said intermediate plate (7) being hinged to the chassis (3) through a hinge point (M), and in that said intermediate plate (7) comprises a first positioning post (71) and a second positioning post (72), said first positioning post (71) and said second positioning post (72) being respectively arranged on both sides of said hinge point (M).

3. Interlocking mechanism according to claim 2, characterized in that the push plate (4) comprises a first slotted hole (41) and the operation aperture cover plate (6) comprises a second slotted hole (61), the first positioning post (71) being arranged in the first slotted hole (41) and the second positioning post (72) being arranged in the second slotted hole (61) such that a movement of the push plate (4) in a first direction (D1) drives the intermediate plate (7) to pivot about a hinge point (M) and thereby the operation aperture cover plate (6) to move in the second direction (D2).

4. The interlocking mechanism according to claim 3, characterized in that the push plate (4) further comprises a push plate body (42) extending along the first direction (D1) and an actuating portion (43) extending perpendicularly to the push plate body (42), the opening button (32) being connected to the actuating portion (43), the first kidney-shaped hole (41) being provided on the actuating portion (43) and extending along the second direction (D2).

5. Interlocking mechanism according to claim 3, characterized in that the operating aperture plate (6) further comprises a plate main body (62) extending in a second direction (D2) and a connecting portion (63) extending perpendicularly to the plate main body (62), the second oblong hole (61) being provided on the connecting portion (63) and extending in the first direction (D1).

6. Interlocking mechanism according to claim 5, characterized in that the cover body (62) is provided with a through hole (64), in the closed position the through hole (64) being offset from the operating hole (31), the cover body (62) shielding the operating hole (31), in the open position the through hole (64) being aligned with the operating hole (31) to open the operating hole (31).

7. Interlocking mechanism according to claim 1, characterized in that the linkage (5) comprises a bar (51), a drive wheel (52) and a spring (53), the bar (51) being movably connected to the housing, and the bar (51) comprising opposite first (511) and second (512) ends, the first end (511) being connected to the housing by the spring (53) and the second end (512) being hinged to the drive wheel (52).

8. The interlocking mechanism according to claim 7, characterized in that the push plate (4) comprises a first surface (44) extending in the first direction (D1), a second surface (45) higher than the first surface (44), and a bevel (46) connecting the first surface (44) and the second surface (45), the drive wheel (52) being pressed against the push plate (4) and against the first surface (44), the bevel (46) and the second surface (45) respectively as the push plate (4) moves in the first direction (D1).

9. Interlocking mechanism according to claim 8, characterized in that the strut (51) further comprises a limit pin (513), the limit pin (513) being arranged perpendicularly to the strut (51) and being fixedly connected with the strut (51), the limit pin (513) being arranged in a kidney-shaped hole (8) of the housing extending in the vertical direction (Z) to enable the strut (51) to move in the vertical direction (Z) relative to the housing.

10. Interlocking mechanism according to claim 9, characterized in that it further comprises a fusion welding limiting plate (9), said fusion welding limiting plate (9) being hinged to said housing and arranged above said driving wheel (52) and being connected to said operating mechanism (2) and rotating with the closing and opening of said operating mechanism (2).

11. Interlocking mechanism according to claim 10, characterised in that the welding limiting plate (9) is provided with a limiting part on the side close to the driving wheel (52) to limit the movement of the limiting pin (513) in the vertical direction (Z) when the operating mechanism (2) is switched on or welding occurs, so as to limit the stroke of the opening button (32) so that the operating hole (31) cannot be opened.

12. Interlocking mechanism according to claim 11, characterized in that the stop has a hook (91),

when the operating mechanism (2) is switched on or welding occurs, the hook part (91) abuts against the limiting pin (513), so that the driving wheel (52) cannot move to the second surface (45) along the inclined surface (46), the stroke of the opening button (32) is limited, and the operating hole (31) cannot be opened,

when the operating mechanism (2) is switched off, the hook part (91) is staggered with the limit pin (513), so that the driving wheel (52) can move to the second surface (45) along the inclined surface (46), and the switching-off button (32) can be fully pressed to open the operating hole (31).

13. Interlocking mechanism according to claim 7, characterized in that the interlocking mechanism (5) further comprises a multi-link mechanism (10) and an interlocking plate (20), the multi-link mechanism (10) being connected to the strut (51) at one end and to the interlocking plate (20) at the other end, the interlocking plate (20) being provided with at least one interlocking plate kidney (201), the at least one interlocking plate kidney (201) extending in the vertical direction (Z) and being movably connected to the housing by means of a bolt (30), the multi-link mechanism (10) driving the interlocking plate (20) in the vertical direction (Z) under the drive of the strut (51).

14. Interlocking mechanism according to claim 13, characterized in that the interlocking mechanism (5) further comprises an intermediate swing arm (40), one end of the intermediate swing arm (40) being hinged to the housing and the other end being free and connected to the interlocking plate (20) so that the interlocking plate (20) when moved in the vertical direction (Z) drives the intermediate swing arm (40) in rotation.

15. Interlocking mechanism according to claim 14, characterised in that the opening half-shaft (1) comprises a cam (11) fixedly arranged on the opening half-shaft (1), said cam (11) being connected with the free end of the intermediate oscillating arm (40) to transmit the rotation of the intermediate oscillating arm (40) to the opening half-shaft (1).

16. Interlocking mechanism according to claim 13, characterized in that the multi-link mechanism (10) is a three-link mechanism.

17. A switchgear, comprising: a chassis (3), a circuit breaker arranged on the chassis (3) and an interlock mechanism according to any of claims 1-16.

Images