CN217214505U - Cabinet door interlocking device of load switch cabinet and load switch cabinet - Google Patents

Abstract

The utility model relates to a load switch cabinet's cabinet door interlock and load switch cabinet. The cabinet door interlock includes: a door lock; a bottom seat; a top seat; a first transmission assembly extending in a height direction of the cabinet and movably disposed on the bottom seat and the top seat, a first end of the first transmission assembly being located near the door lock member, a second end of the first transmission assembly being located near the ground switch mechanism of the three-position mechanism and being configured to be driven by the door lock member to move in a first direction and a second direction; and a second transmission assembly extending along the height direction of the cabinet body and movably arranged on the bottom seat and the first transmission assembly, wherein a first end of the second transmission assembly is positioned near the door lock piece, a second end of the second transmission assembly is arranged near the grounding switch mechanism, and the second transmission assembly is configured to be driven by the first transmission assembly and the door lock piece to move along the first direction and the second direction and can be jointed with or separated from the first transmission assembly.

Description

Cabinet door interlocking device of load switch cabinet and load switch cabinet

Technical Field

The utility model relates to a load switch cabinet's cabinet door interlock and contain this cabinet door interlock's load switch cabinet.

Background

In an electric power system, a switch cabinet is widely used as an electric energy distribution apparatus. The main function of the switch cabinet is to open and close, control and protect electric equipment in the process of power generation, power transmission, power distribution and electric energy conversion of an electric power system. The switch cabinet is mainly provided with a circuit breaker, a disconnecting switch, a load switch, an operating mechanism, various protection devices and the like.

Generally, when the switch cabinet is subjected to an overhaul or maintenance operation, the switch cabinet is required to meet the logic requirement of the OPTION2, that is, the requirement of "five prevention" is met, so that the occurrence of misoperation is prevented, and the safety of overhaul or maintenance personnel is ensured. Therefore, the switch cabinet is provided with a cabinet door mechanical interlocking mechanism.

Generally speaking, the mechanical interlocking mechanism needs to be designed so that the cabinet door of the switch cabinet can meet the logic requirement of OPTION 2. Particularly, only can open the cabinet door when the cubical switchboard is in ground connection combined floodgate state to and after opening the cabinet door, the cubical switchboard can switch to ground connection separating brake state, and after the cubical switchboard is in ground connection separating brake state, the cabinet door can't be closed, and the major loop of cubical switchboard is locked in separating brake state simultaneously.

In some known mechanical interlocking mechanisms meeting the design requirements, a transmission connection relationship exists between the cabinet door interlocking mechanism and a mechanism main transmission chain in the switch cabinet, so that the cabinet door interlocking mechanism can influence the movement of the mechanism main transmission chain.

In other known mechanical interlocking mechanisms which meet the design requirements, when an operator opens a cabinet door of the switch cabinet, the operator needs to lift the interlocking mechanism with one hand and open the cabinet door with one hand, and the operation is complex.

Therefore, how to design a mechanical interlocking mechanism of the cabinet door, which solves at least part of the above problems, is a problem to be solved by those skilled in the art.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a cabinet door interlock and contain this cabinet door interlock's load switch cabinet. Above-mentioned cabinet door interlock and load switch cabinet can solve above-mentioned problem. Furthermore, the utility model discloses a cabinet door interlock can satisfy the logic requirement of OPTIONs 2, can not influence the motion of the interior mechanism final drive chain of load switch cabinet, easy operation, consequently reduced the risk of maloperation.

The above objects are achieved by the cabinet door interlocking device and the load switch cabinet described below.

The utility model relates to a load switch cabinet's cabinet door interlock, load switch cabinet includes the cabinet body, covers the cabinet door of the cabinet body and sets up in the internal three station mechanisms of cabinet, cabinet door interlock includes:

the door locking piece is arranged on a cabinet door of the load switch cabinet and can move along with the cabinet door;

the bottom seat is arranged on the cabinet body;

the top seat is arranged on the three-station mechanism;

a first transmission assembly extending in a height direction of the cabinet and movably disposed on the bottom seat and the top seat, a first end of the first transmission assembly being disposed near the door latch, a second end of the first transmission assembly being disposed near the ground switch mechanism of the three-position mechanism, and the first transmission assembly being configured to be drivable by the door latch to move in first and second directions parallel to the height direction and opposite to each other; and

a second transmission assembly extending in a height direction of the cabinet body and movably disposed on the bottom seat and the first transmission assembly, a first end of the second transmission assembly being disposed near the door lock member, a second end of the second transmission assembly being disposed near the ground switch mechanism, and the second transmission assembly being configured to be drivable by the first transmission assembly and the door lock member to move in the first and second directions and to be engageable with or disengageable from the first transmission assembly,

wherein, when the load switch cabinet is in a grounding and closing state, the transmission part of the grounding switch mechanism avoids the second end of the second transmission assembly, so that:

during opening of the cabinet door, the door lock moves an unlocking distance in the first direction such that the first transmission assembly moves in the first direction from a first initial position and drives the second transmission assembly engaged with the first transmission assembly to move in the first direction from a second initial position, then the second transmission assembly separates from the first transmission assembly and moves back in the second direction to the second initial position and the first transmission assembly continues to move in the first direction to a first end position, and then the door lock moves in a door opening direction with the cabinet door such that the second transmission assembly moves from the second initial position in the first direction to the second end position and then moves back in the second direction to the second initial position, and

during closing of the cabinet door, the door lock moves with the cabinet door in a door closing direction such that the first transmission assembly moves in a second direction from a first end position and the second transmission assembly moves in the first direction from a second initial position to a second end position, then the second transmission assembly moves back to the second initial position in the second direction, and then the door lock moves an unlocking distance in the second direction such that the first transmission assembly moves further in the second direction to the first initial position and the second transmission assembly engages with the first transmission assembly; and

when the load switch cabinet is in a grounding opening state, the transmission part of the grounding switch mechanism moves to the vicinity of the second end of the second transmission component and is separated from the second end of the second transmission component by a gap, so that the second transmission component cannot move to a second end position along a first direction, and the cabinet door cannot be opened or closed.

In an embodiment, the second transmission assembly is movable in the second direction back to the second initial position under the influence of its gravity.

In an embodiment, the second transmission assembly is further capable of moving back to the second initial position in the second direction under the action of the elastic member.

In an embodiment, the cabinet door interlock further includes a driving assembly configured to drive the second transmission assembly to move from a second initial position to the second end position in the first direction when the door lock moves in the door opening direction or the door closing direction.

In one embodiment, the driving assembly is located near the first end of the second transmission assembly and includes a first rotating shaft disposed on the bottom seat, a first rotating member abutting against the first end of the second transmission assembly and rotatable about the first rotating shaft, a driving portion disposed on the door lock member, and a first elastic member disposed between the bottom seat and the first rotating member and applying an elastic biasing force to the first rotating member,

the first rotating member is matched with the driving part, so that when the door locking piece moves along the door opening direction or the door closing direction, the first rotating member rotates along the third direction from the first initial rotating position to the first final rotating position under the action of the elastic biasing force of the first elastic member, and then the second transmission assembly is driven to move along the first direction from the second initial position to the second final rotating position; and when the second transmission assembly moves from the second end position to the second initial position along the second direction, the first rotating member rotates from the first rotation end position to the first rotation initial position along the direction opposite to the third direction against the elastic biasing force of the first elastic member under the action of the second transmission assembly.

In one embodiment, the first rotating member is provided with a driven portion engaged with the driving portion, and the driven portion and the first elastic member are respectively provided at opposite ends of the first rotating member with respect to the first rotating shaft.

In an embodiment, the cabinet door interlock further comprises a retaining assembly configured to retain the first transmission assembly in the first terminal position after the cabinet door is opened.

In one embodiment, the holding assembly is located near the first end of the first transmission assembly and includes a second rotation shaft provided on the bottom seat, a second rotation member rotatable about the second rotation shaft, and a second elastic member connected between the bottom seat and the second rotation member and applying an elastic biasing force to the second rotation member,

wherein the second rotating member is rotated in a fourth direction from a second rotation end position to a second rotation initial position by an elastic biasing force of the second elastic member when the door lock is moved in the door opening direction,

wherein the second rotating member is rotated in a direction opposite to the fourth direction from a second rotation initial position to a second rotation end position against the resilient biasing force of the second resilient member by the door lock when the door lock is moved in the door closing direction, and

wherein the first transmission assembly is maintained in the first end position when the second rotating member is located at the second rotational initial position.

In one embodiment, when the second rotating member is located at the second rotation initial position, the force applied to the second rotating member exceeds a dead point.

In an embodiment, the cabinet door interlock further comprises an engagement assembly configured to engage or disengage the first transmission assembly with or from the second transmission assembly.

In one embodiment, the engagement assembly includes a third rotation shaft provided on the first transmission assembly and a third rotation member rotatable about the third rotation shaft, a projection provided on the second transmission assembly, a third elastic member provided between the third rotation member and the first transmission assembly and applying an elastic biasing force to the third rotation member, and a stopper portion provided on the top mount,

wherein, when the first transmission assembly moves in the first direction, the third rotating member rotates in a fifth direction against the elastic biasing force of the third elastic member under the blocking of the limiting portion, and is separated from the protruding portion, and

wherein, when the first transmission assembly moves in the second direction, the third rotating member rotates in a direction opposite to the fifth direction by the elastic biasing force of the third elastic member, thereby engaging with the protrusion.

In an embodiment, the free end of the third rotation element has a hook portion configured to hook the protrusion portion to engage the first transmission assembly with the second transmission assembly.

In an embodiment, the hook portion includes a guide portion extending from a body thereof away from the third rotation axis, the guide portion being configured to enable the third rotation member to rotate in the fifth direction after rotating in a direction opposite to the fifth direction to abut against the protrusion, thereby causing the hook portion to hook the protrusion from below.

In an embodiment, an end of the third rotating member opposite to the free end is configured to be able to abut against the stopper portion when the third rotating member rotates.

In one embodiment, the force experienced by the third rotating member exceeds a dead point when the third rotating member engages a protrusion.

In an embodiment, the cabinet door interlock further comprises a primary circuit locking assembly configured to maintain a primary circuit switch operating aperture of the three-position mechanism blocked when the load switchgear is in a ground opening state.

In one embodiment, the primary circuit lock assembly is located near the second end of the first transmission assembly and includes a drive lever movably disposed on the top seat and connected with the ground contact flap of the ground switch operation hole of the three-position mechanism, a fourth rotation shaft disposed on the top seat, a fourth rotation member rotatable about the fourth rotation shaft, a fourth rotation member disposed at the second end of the first transmission assembly, a stopper disposed between the top seat and the fourth rotation member and applying an elastic biasing force to the fourth rotation member,

when the first transmission assembly is located at the first initial position, the fourth rotating member is located at a fourth rotation ending position under the action of a stop member and a driving rod and overcomes the elastic biasing force of a fourth elastic member, and the driving rod can move along with the grounding baffle between a locking position for exposing the grounding switch operation hole and shielding the main circuit switch operation hole and an unlocking position for shielding the grounding switch operation hole; and

when the first transmission assembly is located at the first termination position and the driving rod is located at the locking position, the fourth rotating member is located at the fourth rotation initial position under the elastic biasing force of the fourth elastic member and keeps the driving rod at the locking position.

In an embodiment, a first pin is provided on the fourth rotation member, and the stop member can abut against the first pin to hold the fourth rotation member at the fourth rotation end position when the first transmission assembly is located at the first initial position.

In an embodiment, the fourth rotating member is further provided with a second pin, which can abut against the driving lever to keep the driving lever in the locking position when the first transmission assembly is in the first end position and the driving lever is in the locking position.

In an embodiment, the main circuit locking assembly further comprises a first slot and a second slot provided on the top seat and communicating with each other, the free end of the driving rod being able to slide in the first slot, the second pin being able to slide in the second slot.

In one embodiment, the first transmission assembly and the second transmission assembly are respectively disposed on two opposite sides of the main body of the bottom seat.

In one embodiment, the first transmission assembly and/or the second transmission assembly comprise a plurality of transmission members connected to each other.

In one embodiment, at least one of the plurality of transmission members of the first transmission assembly and/or the plurality of transmission members of the second transmission assembly is provided with at least one hole extending in the first direction.

In one embodiment, the cabinet body includes a front frame disposed in front of an air box of the load switch cabinet and a bottom frame located below the air box, and the bottom seat is disposed on the front frame and the bottom frame.

In an embodiment, a protrusion is disposed at the first end of the first transmission assembly, a recess is disposed on the door lock to match the protrusion, and the door lock drives the first transmission assembly to move through the protrusion disposed in the recess when moving in the first direction or the second direction.

The utility model discloses still relate to a load switch cabinet, load switch cabinet includes as above cabinet door interlock.

Drawings

The advantages and objects of the present invention will be better understood from the following detailed description of the preferred embodiments of the invention, taken in conjunction with the accompanying drawings. The drawings are not necessarily to scale, emphasis instead being placed upon illustrating the relationship of the various components. In the drawings:

fig. 1 shows a load switch cabinet according to an embodiment of the invention;

fig. 2 shows a schematic view of the respective directions of the cabinet door interlock when the cabinet door of the load switch cabinet is closed according to an embodiment of the present invention;

fig. 3 shows a schematic view of the respective directions of the cabinet door interlock device when the cabinet door of the load switch cabinet is opened according to an embodiment of the present invention;

fig. 4 shows a schematic view of a door locking element of a door locking device of a load-break switchgear cabinet according to an embodiment of the invention, as the door is moved in the door opening direction or in the door closing direction;

fig. 5 shows a partial schematic view of the earthing switch mechanism when the second end of the second transmission assembly of the cabinet door interlock device is closed with the earthing switch according to an embodiment of the present invention;

fig. 6 shows a partial schematic view of the earthing switch mechanism when the second end of the second transmission assembly of the cabinet door interlock is tripped from the earthing switch according to one embodiment of the present invention;

fig. 7 shows a schematic view of a first end of a first transmission assembly and a retaining assembly of a cabinet door interlock according to an embodiment of the present invention, wherein the first transmission assembly is in a first initial position;

fig. 8 shows a schematic view of a first end of a first transmission assembly and a retaining assembly of a cabinet door interlock device according to an embodiment of the present invention, wherein the first transmission assembly is in a first end position;

fig. 9 shows a schematic view of an engagement assembly of a cabinet door interlock according to one embodiment of the present disclosure, which engages a first drive assembly with a second drive assembly;

fig. 10 shows a schematic view of an engagement assembly of a cabinet door interlock according to one embodiment of the present invention, which disengages a first transmission assembly from a second transmission assembly;

fig. 11 illustrates a schematic diagram of the second end of the first transmission assembly and the main circuit locking assembly of the cabinet door interlock when the load switch cabinet is in a ground-closed state and the cabinet door is closed, according to an embodiment of the present invention;

fig. 12 shows a schematic view of the second end of the first transmission assembly and the primary circuit locking assembly of the cabinet door interlock device when the cabinet door of the load switch cabinet is open and in the grounded open state, according to an embodiment of the present invention;

FIG. 13 shows a schematic view of the main circuit lockout assembly shown in FIG. 11; and

FIG. 14 shows a schematic view of the primary loop locking assembly shown in FIG. 12.

Detailed Description

Various embodiments according to the present invention will be described in detail with reference to the accompanying drawings. Here, it is to be noted that, in the drawings, the same reference numerals are given to constituent parts having substantially the same or similar structures and functions, and repeated description thereof will be omitted. The terms "first direction", "second direction", "third direction", and the like herein are described with respect to the drawings of the present invention, if not otherwise specified. The description of "first" and its variants is merely for the purpose of distinguishing between the parts and does not limit the scope of the invention, which can be written as "second" and so on without departing from the scope of the invention. The use of the terms "comprising," "including," or "having" and the like, mean that the elements or items listed before or after the term, and the equivalents thereof, are included without excluding other elements or items. The terms "connected" or "coupled" and the like are not restricted to the physical or mechanical connections or couplings shown in the drawings, but may include connections or couplings equivalent thereto, 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. In addition, the drawings of the present invention, which relate to an elastic member such as a spring, schematically illustrate the approximate position thereof, and do not clearly illustrate the connection relationship thereof.

The drawings in the present specification are schematic views to assist in explaining the concept of the present invention, and schematically show the shapes of the respective portions and the mutual relationships thereof.

Hereinafter, preferred embodiments according to the present invention will be described in detail with reference to the respective drawings.

Fig. 1 shows a load switch cabinet according to the invention only schematically, wherein the right-hand side schematic view shows a front view of the load switch cabinet and the left-hand side schematic view shows an a-a section of the right-hand side schematic view. The load switch cabinet shown in fig. 1 includes a cabinet body 31 and a three-position mechanism 26 disposed in the cabinet body 31. The three-position mechanism 26 is configured to allow the load switchgear to be in a ground-closed state, a ground-open state, and a main circuit-closed state. In addition, an air box 30 is disposed in the cabinet 31, high-voltage components in the load switch cabinet, such as a circuit breaker, a disconnecting switch, a load switch, a grounding switch, and the like, are sealed in the air box 30, and compressed air filled in the air box 30 provides an excellent operating environment for the high-voltage components. Specifically, the three-position mechanism 26 may include a main circuit flap 27 of the main circuit switch operation aperture and a ground flap 29 of the ground switch operation aperture, wherein the main circuit flap 27 is configured to move between a position blocking the main circuit switch operation aperture and a position exposing the main circuit switch operation aperture, e.g., to be rotated by manual manipulation by an operator, and the ground flap 29 is configured to move between a position blocking the ground switch operation aperture and a position exposing the ground switch operation aperture, e.g., to be rotated by manual manipulation by the operator. In addition, the three-position mechanism 26 may also include a slider 28 located between the main circuit flap 27 and the ground flap 29. When the grounding barrier 29 exposes the grounding switch operation hole, the operator can open the grounding switch by manipulating (e.g., inserting the operation handle into) the grounding switch operation hole, and at this time, the slider 28 moves to disable the movement of the main circuit barrier 27 that shields the main circuit switch operation hole, thereby causing the operator to disable the manipulation of the main circuit switch operation hole (i.e., disable the rotation of the main circuit barrier 27 to expose the main circuit switch operation hole, and thus disable the insertion of the operation handle, thereby disabling the operation of the main circuit), thereby causing the three-position mechanism to be locked at the grounding open position. In addition, as shown in the right-hand schematic view of fig. 1, the load switchgear includes a cabinet door 34 covering the cabinet body 31, which is located at the lower portion of the load switchgear, also referred to as the lower door. The cabinet body 31 includes a front frame 32 located in front of the air box 30 of the load switchgear, and a bottom frame 33 located below the air box 30 and corresponding to the cabinet door 34. The door interlock 100 of the load switch cabinet is at least partially disposed on the cabinet body 31, for example, on the front frame 32 and the bottom frame 33.

The differently oriented cabinet door interlock 100 as shown in fig. 2 and 3 includes: a first transmission assembly 1, a second transmission assembly 2, a door locking member 3, a top seat 4 and a bottom seat 23. The door lock 3 is disposed on a door 34 of the load switch cabinet and can move along with the door 34. The top seat 4 is arranged on a three-position mechanism 26. The bottom seat 23 is disposed on the cabinet 31, for example, the bottom frame 33. For example, the top mount 4 may be fixed to the body of the three-position mechanism 26. For example, the bottom seat 23 is fixed to the cabinet 31.

The first transmission assembly 1 extends along the height direction of the cabinet 31 and is movably disposed on the bottom seat 23 and the top seat 4. A first end (i.e., a bottom end located below) of the first transmission assembly 1 is disposed near the door lock 3, a second end (i.e., a top end located above) of the first transmission assembly 1 is located near the ground switch mechanism of the three-position mechanism 26, and the first transmission assembly 1 is configured to be drivable by the door lock 3 to move in a first direction (i.e., a vertically upward direction in fig. 2) and a second direction (i.e., a vertically downward direction in fig. 2) parallel to the height direction and opposite to each other.

The second transmission assembly 2 extends in the height direction of the cabinet 31 and is movably disposed on the bottom seat 23 and the first transmission assembly 1, a first end (i.e., a bottom end located below) of the second transmission assembly 2 is disposed near the door lock 3, a second end (i.e., a top end located above) of the second transmission assembly 2 is disposed near the ground switch mechanism, and the second transmission assembly 2 is configured to be capable of being driven by the first transmission assembly 1 and the door lock 3 to move in the first direction and the second direction and to be capable of engaging with or disengaging from the first transmission assembly 1.

For example, the first transmission assembly 1 and the second transmission assembly 2 may be respectively disposed on two opposite sides of the main body of the bottom seat 23. It can also be said that the first end of the first transmission assembly 1 and the first end of the second transmission assembly 2 are located on opposite sides of the body of the bottom seat 23.

For example, the first transmission assembly 1 comprises a plurality of transmission members 13, 14, 22 connected to each other. The transmission pieces 13, 14 and 22 extend along the height direction of the cabinet body and are connected together through bolts, rivets and the like. For example, the second transmission assembly 2 comprises a plurality of transmission members 8, 15, 16 connected to each other. The transmission pieces 8, 15 and 16 extend along the height direction of the cabinet body and are connected together through bolts, rivets and the like. For example, the transmission member may have a plate-like form.

In some embodiments, at least one of the plurality of transmission members of the first transmission assembly 1 and/or the plurality of transmission members of the second transmission assembly 2 is provided with at least one hole extending in the first direction.

For example, the transmission members 13 and 22 of the first transmission assembly 1 are each provided with a hole extending in the first direction, for example, the upper portion of the transmission member 13 is provided with two parallel long-waist holes 40, the lower portion of the transmission member 13 is provided with two superposed long-waist holes 55, and the transmission member 22 is provided with two long-waist holes 56 parallel to each other, as shown in fig. 2. For example, the first transmission assembly 1 may be guided to move relative to the second transmission assembly 2 by means of bushings or pins cooperating with the long kidney holes 40 and 56 described above. By providing the long kidney holes 40 and 56 as described above, it is possible not only to move the first transmission assembly 1 by a stroke in the first and second directions, but also to compensate for a change in the position of the interlocking device due to deformation of the gas tank 30 and assembly errors of other parts of the cabinet. By providing the long kidney holes 55, it is possible to compensate for the position change of the interlocking means due to the deformation of the air box 30 and the assembly error of other parts of the cabinet.

For example, the transmission members 8, 15, 16 of the second transmission assembly are each provided with a hole extending in the first direction, for example, the transmission member 8 is provided with two parallel long-waist holes 41, the transmission member 15 is provided with two parallel long-waist holes 57, and the transmission member 16 is provided with two parallel long-waist holes 58, as shown in fig. 2. For example, the second transmission assembly 2 can be guided to move with respect to the first transmission assembly 1 by means of bushings or pins cooperating with the long kidney holes 41 and 58 described above. By providing the long kidney holes 41 and 58, it is possible to compensate for the position change of the interlocking device due to the deformation of the air box 30 and the assembly error of other parts of the cabinet, as well as to move the second driving unit 2 by a stroke in the first and second directions. By providing the long waist holes 57 as described above, it is possible to compensate for the positional variation of the interlocking means due to the deformation of the air box 30 and the assembly error of other parts of the cabinet.

Through set up the hole that extends along the first direction on the driving medium, can compensate because the interlock's that the assembly error of the deformation of gas tank 30 and other parts of cupboard leads to position change, make the utility model discloses an interlock has higher flexibility, can be applicable to different situations.

In some embodiments, for example, the transmission element 13 forming part of the first transmission assembly 1 has two opposite folds forming a groove with its body, in which groove the transmission element 8 forming part of the second transmission assembly 2 is located. In this way, the strength of the transmission member 13 can be enhanced. In some embodiments, the transmission member 8 may also have a similar form, thereby having a higher strength.

In addition, the first transmission assembly 1 further comprises a stop 20 provided at its second end as part of the primary circuit locking assembly, which is for example riveted onto the transmission piece 13 of the first transmission assembly 1. In addition, for example, the portion of the stopper 20 connected to the transmission member 13 may be provided with a long kidney hole to further compensate for the change in position of the interlock device caused by the deformation of the air tank 30 and the assembly error of other parts of the cabinet.

Further, the second transmission assembly 2 also comprises a further stop 36 arranged at its second end, for example fixed to the transmission member 8 of the second transmission assembly.

Further, a protrusion 53 is disposed at a first end of the first transmission assembly 1 (for example, on the transmission member 22 of the first transmission assembly 1), a recess 54 engaged with the protrusion 53 is disposed on the door lock member 3, and the door lock member 3 drives the first transmission assembly 1 to move in the first direction or the second direction through the protrusion 53 disposed in the recess 54 when moving in the first direction or the second direction. For example, the projection 53 is a rivet on the transmission member 22, and the recess 54 is a rectangular groove on the door lock member 3.

When the load switch cabinet is in the ground-closing state, the transmission part 35 of the ground switch mechanism may avoid the second end of the second transmission assembly 2, as shown in fig. 5, for example avoiding the further stop 36. In this case, during the process of opening the cabinet door 34, the door locking member 3 is moved by the unlocking distance in the first direction, so that the first transmission assembly 1 is moved from the first initial position in the first direction and brings the second transmission assembly 2 engaged with the first transmission assembly 1 to move from the second initial position in the first direction, then the second transmission assembly 2 is separated from the first transmission assembly 1 and moved back to the second initial position in the second direction and the first transmission assembly 1 continues to move in the first direction to the first end position, and then the door locking member 3 is moved with the cabinet door 34 in the door opening direction, so that the second transmission assembly 2 is moved from the second initial position in the first direction to the second end position and then moved back to the second initial position in the second direction. Furthermore, during closing of the cabinet door 34, the door lock 3 moves with the cabinet door 34 in the door closing direction, such that the first transmission assembly 1 moves from the first end position in the second direction and the second transmission assembly 2 moves from the second initial position in the first direction to the second end position, then the second transmission assembly 2 moves back to the second initial position in the second direction, and then the door lock 3 moves the unlocking distance in the second direction, such that the first transmission assembly 1 moves further in the second direction to the first initial position and the second transmission assembly 2 engages with the first transmission assembly 1.

The "door opening direction" and the "door closing direction" as referred to herein refer to rotational directions in which the cabinet door is opened and closed about its rotational axis, which are opposite to each other. In addition, the phrase "the door lock 3 moves the unlocking distance in the first direction" as used herein means that the door is lifted in the first direction to unlock the door 34 (e.g., the mechanism on the door is disengaged from the hook provided on the door) so that the door can be rotated in the door opening direction to fully open the door, and the phrase "the door lock 3 moves the unlocking distance in the second direction" means that the door can fall in the second direction under its own weight to lock the door 34 (e.g., the hook provided on the door hooks the mechanism on the door).

For example, the projection 53 may be separated from the recess 54 when the door locking member 3 moves in the door opening direction with the door 34, and the projection 53 may enter the recess when the door locking member 3 moves in the door closing direction with the door 34.

Fig. 2 schematically shows the door interlock when the door is closed, fig. 3 schematically shows the door interlock after opening, and fig. 4 schematically shows the door interlock when the door locking member 3 is moved in the door opening direction or the door closing direction. The first transmission assembly 1 is in a first initial position and the second transmission assembly 2 is in a second initial position in fig. 2. The first transmission assembly 1 is in fig. 3 in a first end position and the second transmission assembly 2 is in a second initial position. The first transmission assembly 1 is shown in fig. 4 in a first end position and the second transmission assembly 2 in a second end position. It should be noted that the termination point described herein is merely used to distinguish from the initial point and does not have any other meaning, such as terminating movement of any component, etc.

In some embodiments, the second transmission assembly 2 may be moved back to the second initial position in the second direction under the influence of its gravity. Additionally or alternatively, in other embodiments, the second transmission assembly 2 may also be moved back to the second initial position in the second direction under the action of the elastic member. The resilient member may provide a greater driving force for the second transmission assembly 2 to move in the second direction.

As shown in fig. 6, when the load switch cabinet is in the ground opening state, the transmission member 35 of the ground switch mechanism moves to the vicinity of the second end of the second transmission assembly 2 and is spaced apart from the second end of the second transmission assembly (i.e., the additional stopper 36) by a gap, so that the second transmission assembly 2 cannot move to the second end position in the first direction, resulting in that the cabinet door 34 cannot be opened or closed. In particular, the size of the above-mentioned gap is relatively small and not clearly shown in fig. 6. In addition, the above distance is much smaller than the unlocking distance of the lower door.

The clearance between above-mentioned earthing switch mechanism's drive disk assembly 35 and the interlock has avoided the interlock to be connected with load switch cabinet's final drive chain, consequently the utility model discloses an interlock can not influence the motion of final drive chain for load switch cabinet is safe and reliable more.

Further, the above-mentioned cabinet door interlock can only open the cabinet door or close the cabinet door when the load switch cabinet is in the ground connection and closing state. Therefore, an operator can easily understand that when the cabinet door cannot be closed after the door is opened, the load switch cabinet is in a grounding opening state; when the closed cabinet door cannot be opened, the load switch cabinet is in a grounding and opening state; when the door of the load switch cabinet can be closed or opened after the door is opened, the load switch cabinet is in a grounding switch-on state. The utility model discloses a cabinet door interlock provides the judgement to ground connection separating brake or combined floodgate from the mechanical aspect when providing reliable interlocking logic.

As shown in fig. 4, the cabinet door interlock device 100 may further include a driving assembly configured to drive the second transmission assembly 2 to move from the second initial position to the second end position in the first direction when the door locking member 3 moves in the door opening direction or the door closing direction.

For example, the drive assembly is located near a first end of the second transmission assembly 2, for example, near the transmission piece 16 of the second transmission assembly 2. The driving assembly may include a first rotation shaft 19 disposed on the bottom seat 23, a first rotation member 18 abutting against a first end of the second transmission assembly 2, for example, an end of the transmission member 16 and rotatable about the first rotation shaft 19, a driving portion 42 disposed on the door latch 3, and a first elastic member 37 disposed between the bottom seat 23 and the first rotation member 18 and applying an elastic biasing force to the first rotation member 18. The first rotating member 18 is provided with a driven portion 43 engaged with the driving portion 42, and the driven portion 43 and the first elastic member 37 are respectively provided at opposite ends of the first rotating member 18 with respect to the first rotating shaft 19. The driving portion 42 is, for example, a guide curved surface on the door lock 3. The first rotating member 18 cooperates with the driving portion 42 such that when the door locking member 3 moves in the door opening direction or the door closing direction, the first rotating member 18 rotates in a third direction (i.e., counterclockwise in the plane of the drawing of fig. 4) from the first rotation initial position (as shown in fig. 2 and 3) to the first rotation end position (as shown in fig. 4) under the action of the elastic biasing force (e.g., pulling force) of the first elastic member 37, thereby driving the second transmission assembly 2 to move in the first direction from the second initial position to the second end position; and when the second transmission assembly 2 moves in the second direction from the second end position back to the second initial position, the first rotation member 18 rotates in a direction opposite to the third direction (i.e., clockwise in the drawing plane of fig. 3) from the first rotation end position to the first rotation initial position against the resilient biasing force of the first resilient member 37 by the second transmission assembly 2. For example, the second transmission assembly 2 described herein functions as the first rotating member 18 by the second transmission assembly 2 moving in the second direction under the action of its gravity.

For example, the transmission element 16 of the second transmission assembly 2 is mounted on the bottom seat 23 by means of a bushing 17, the bushing 17 passing through a hole, for example two parallel long-kidney holes 58, of the transmission element 16. In this way, the transmission piece 16 may move in the first direction relative to the bottom seat 23 when the first rotation element 18 rotates in the third direction. In addition, the elongated kidney holes 58 in the transmission member 16 compensate for the change in the position of the interlock caused by deformation of the air box 30 and assembly errors in other parts of the cabinet.

As shown in fig. 7 and 8, the cabinet door interlock 100 may further include a retaining assembly configured to retain the first transmission assembly 1 in the first terminal position after the cabinet door 34 is opened, as shown in fig. 3.

For example, the holding assembly is located near a first end of the first transmission assembly 1, for example, near the transmission piece 22 of the first transmission assembly 1. The holding assembly includes a second rotating shaft 44 provided on the bottom base 23, a second rotating member 24 rotatable about the second rotating shaft 44, and a second elastic member 21. The second elastic member 21 is connected between the bottom seat 23 and the second rotating member 24 and exerts an elastic biasing force on the second rotating member 24. When the door-lock piece 3 is moved in the door-opening direction, the second rotating member 24 is rotated in the fourth direction (i.e., counterclockwise in the drawing plane of fig. 7 and 8) from the second rotation-terminating position (shown in fig. 7) to the second rotation-initiating position (shown in fig. 8) by the elastic biasing force (e.g., pulling force) of the second elastic member 21. When the door-locking piece 3 moves in the door-closing direction, the second rotating piece 24 rotates in the direction opposite to the fourth direction (i.e., clockwise in the plane of the drawings of fig. 7 and 8) from the second rotation initial position to the second rotation end position against the elastic biasing force of the second elastic piece 21 by the door-locking piece 3. As shown in fig. 8, when the second rotating member 24 is located at the second rotation initial position, the first transmission assembly 1 is maintained at the first end position.

For example, the transmission element 22 of the first transmission assembly 1 is arranged on the bottom seat 23 by means of a bushing 17 and a pin 25, the bushing 17 and the pin 25 passing through a hole, for example two long kidney holes 56, parallel to each other, in the transmission element 22. In this way, when the door lock member 3 is moved in the first direction or the second direction, the transmission member 22 of the first transmission assembly 1 can be moved in the first direction or the second direction. Furthermore, when the second rotating member 24 is located at the second rotation initial position, the second rotating member 24 blocks the movement of the transmission member 22 in the second direction, so that the first transmission assembly 1 is maintained at the first end position. In some examples, the second rotating member 24 is provided with a protrusion or a recess, and the transmission member 22 of the first transmission assembly 1 is provided with a recess or a protrusion matching with the protrusion or the recess, and when the second rotating member 24 is located at the second rotation initial position, the protrusion can be located in the recess, and the downward movement space of the transmission member 22 is blocked, so that the transmission member 22 cannot move in the second direction.

For example, when the second rotating member 24 is located at the second rotation initial position shown in fig. 8, the force applied to the second rotating member 24 passes through the dead point, i.e., the direction of the force substantially passes through the rotation center of the second rotating member 24, so that the second rotating member 24 does not rotate under the action of the second elastic member 21 (e.g., under the pulling force of the second elastic member 21). In this case, the first transmission assembly 1 does not move in the second direction and is therefore held in the first end position. By adopting the design of passing the dead point, the design strength of the second rotating member can be reduced, and therefore, the interlocking device has a simple structure and is low in cost.

For example, as shown in fig. 7 and 8, since the first ends of the first transmission assembly 1 and the second transmission assembly 2 are respectively disposed at two opposite sides of the main body of the bottom seat 23, and the second rotating member 24 is provided with the extending portion 52, the door lock member 3 can drive the second rotating member 24 to rotate through the extending portion 52. For example, the driving assembly and the holding assembly are disposed on opposite sides of the main body of the bottom seat 23, and the extension portion 52 extends from the second rotating member 24 to the side where the driving assembly is located.

As shown in fig. 9 and 10, the cabinet door interlock 100 may further include an engaging assembly configured to engage or disengage the first transmission assembly 1 with or from the second transmission assembly 2.

For example, the joint assembly includes a third rotation shaft 10 provided on the first transmission assembly 1 and a third rotation member 12 rotatable about the third rotation shaft 10, a protrusion 45 provided on the second transmission assembly 2, a third elastic member 38 provided between the third rotation member 12 and the first transmission assembly 1 and applying an elastic biasing force to the third rotation member 12, and a stopper 9 provided on the top seat 4. In particular, the third rotation axis 10 and the third rotation element 12 are arranged on a transmission element 13 of the first transmission assembly 1, for example on a fixed plate 11 fixed to the transmission element 13. The third elastic element 38 is arranged between the third rotary element 12 and the transmission element 13 of the first transmission assembly 1, as shown in fig. 2 and 3. The protrusion 45 is disposed on the transmission member 8 of the second transmission assembly 2, i.e. the transmission member 8 is located in the groove of the transmission member 13. The transmission member 13 is provided with an opening for the protrusion 45 to pass through and provide a required movement stroke space for the up and down movement of the second transmission assembly 2.

When the first transmission assembly 1 moves in the first direction, the third rotating member 12 rotates in the fifth direction (i.e., clockwise in the drawing plane of fig. 9 and 10) against the elastic biasing force of the third elastic member 38 under the block of the stopper portion 9 to be separated from the protruding portion 45. When the first transmission assembly 1 moves in the second direction, the third rotating member 12 rotates in the direction opposite to the fifth direction (i.e., counterclockwise in the drawing plane of fig. 9 and 10) by the elastic biasing force of the third elastic member 38, thereby engaging with the projection 45.

For example, when the third rotating member 12 is located at the engagement position as shown in fig. 9, the force applied to the third rotating member 12 passes through the dead point, i.e., the direction of the force is approximately passed through the rotation center of the third rotating member 12, i.e., the third rotation axis 10, and thus the third rotating member 12 is not rotated by the tensile force of the third elastic member 38. In this case, when the first transmission assembly 1 moves along the first direction, the second transmission assembly 2 is driven to move along the first direction. By adopting the design of passing the dead point, the design strength of the third rotating member can be reduced, and therefore, the interlocking device has a simple structure and is low in cost.

For example, the free end of the third rotation element 12 has a hook portion 46, said hook portion 46 being configured to be able to hook the projection 45 to engage the first transmission assembly 1 with the second transmission assembly 2. For example, the hook portion 46 includes a guide portion 59 extending from a body thereof away from the third rotation shaft 10, the guide portion 59 being configured to be able to rotate the third rotation member 12 in the fifth direction after abutting against the protrusion 45 with the third rotation member 12 rotated in the direction opposite to the fifth direction, so that the hook portion 46 hooks the protrusion 45 from below. Specifically, after the guide portion 59 abuts against the protruding portion 45, the guide portion 59 may cause the hook portion 46 to hook the protruding portion 45 from below over the protruding portion 45. For example, the guide portion 59 extends obliquely downward with respect to the second direction, and thus has an inclined guide surface that can abut against the leftmost end of the protruding portion 45, so that the hook portion 46 can pass around the leftmost end of the protruding portion 45 and reach under the protruding portion 45 by the third elastic member 38 and engage with the protruding portion 45.

For example, an end of the third rotating member 12 opposite to the free end is configured to be able to abut against the stopper portion 9 when the third rotating member rotates. For example, the stopper 9 includes a baffle 60 fixed to the top seat 4, extending obliquely upward with respect to the first direction, and thus having an inclined guide surface. The baffle 60 and the stopper portion 9 may have the form of a single member, or the baffle 60 may be connected to the stopper portion 9 by welding, riveting, screwing, or the like. Furthermore, the inclined guide surface may be an obliquely upwardly extending surface on the stopper portion 9. When the first transmission assembly 1 moves in the first direction so that the third rotating member 12 abuts against the baffle of the limiting portion 9, the inclined guide surface of the baffle causes the third rotating member 12 to rotate in the fifth direction, thereby separating from the protruding portion 45. When the first transmission assembly 1 moves in the second direction, the third rotating member 12 abutting the inclined guide surface of the shutter is gradually rotated in the direction opposite to the fifth direction by the third elastic member 38.

By means of the above-described coupling assembly, the movements of the first transmission assembly 1 and the second transmission assembly 2 can be made independent of each other. In particular, it is ensured that the second transmission assembly 2 returns to its second initial position after opening the door, avoiding influencing the movement of the transmission member 35 of the earthing switch mechanism.

As shown in fig. 11-14, the cabinet door interlock can further include a primary circuit locking assembly configured to maintain the primary circuit switch operating aperture of the three-position mechanism shielded when the load switch cabinet is in the ground opening state.

For example, the primary circuit locking assembly is located near the second end of the first transmission assembly 1. The main circuit locking assembly may include the driving lever 7, the fourth rotation shaft 47, the fourth rotation member 6, the stopper 20, and the fourth elastic member 39. The driving rod 7 is movably arranged on the top seat 4 and is connected with a grounding baffle 29 of a grounding switch operation hole of the three-position mechanism. A fourth rotation axis 47 is provided on the top seat 4, and the fourth rotation member 6 is rotatable about the fourth rotation axis 47. The stop 20 is arranged at a second end of the first transmission component 1, for example on the top end of the transmission piece 13 of the first transmission component 1. The fourth resilient member 39 is connected between the top seat 4 and the fourth rotating member 6 and exerts a resilient biasing force on the fourth rotating member 6.

When the first transmission assembly 1 is located at the first initial position, the fourth rotating member 6 is located at the fourth rotation end position (as shown in fig. 11) against the resilient biasing force of the fourth resilient member 39 by the stopper 20 and the drive lever 7, and the drive lever 7 is movable with the ground contact piece 29 of the ground switch operation hole between the lock position where the ground switch operation hole is exposed to shield the main circuit switch operation hole and the unlock position where the ground switch operation hole is shielded. That is, when the cabinet door 34 is closed, the movement of the driving lever 7 is not restricted. The ground flap 29 can be manually moved by an operator to the position shown in figure 12 to expose the ground switch operating aperture and can be returned to the position shown in figure 11 by the action of its resilient member 48. The main circuit shutter 27 of the main circuit switch operation hole may be manually dialed by an operator to rotate clockwise (i.e., toward the slider 28) to expose the main circuit switch operation hole, and may return to a position of shielding the main circuit switch operation hole under the action of the elastic member 49 thereof. Further, when the ground flap 29 exposes the ground switch operation hole, as shown in fig. 12, the main circuit flap 27 cannot be rotated clockwise to expose the main circuit switch operation hole.

When the first transmission assembly 1 is located at the first end position and the drive lever 7 is located at the lock position, the fourth rotating member 6 is located at the fourth rotation initial position (as shown in fig. 12) and holds the drive lever 7 at the lock position under the elastic biasing force (e.g., pulling force) of the fourth elastic member 39. That is, when the cabinet door 34 is opened and the ground is opened, the driving rod 7 keeps the ground blocking piece 29 of the ground switch operation hole at a position exposing the ground switch operation hole, and the ground blocking piece 29 further pushes the slider 28, so that the main circuit switch operation hole is always blocked by the main circuit blocking piece 27, and therefore, the opening or closing operation of the main circuit cannot be performed, that is, the load switch cabinet is locked in the ground opening state.

The fourth rotation member 6 is provided with a first pin 61 and a second pin 62. As shown in fig. 13, when the first transmission assembly 1 is in the first initial position, the stopper 20 can abut against the first pin 61 to hold the fourth rotating member 6 in the fourth rotation end position. As shown in fig. 14, when the first transmission assembly 1 is in the first end position and the driving lever is in the locking position, the second pin 62 can abut against the driving lever 7 to keep the driving lever 7 in the locking position, i.e. the driving lever 7 cannot move. The primary circuit locking assembly also comprises a first slot 50 and a second slot 51, provided on the top seat 4 and communicating with each other, the free end 71 of the driving rod 7, i.e. the end opposite to the end connected to the ground flap 29, being slidable in the first slot 50, the second pin 62 being slidable in the second slot 51. As shown in fig. 14, when the first transmission assembly 1 is located at the first end position and the load switch cabinet is in the ground opening state, the stopper 20 moves upward and the driving rod 7 moves upward along with the ground blocking plate 29, no longer blocking the fourth rotating member 6, and the fourth rotating member 6 can rotate in the counterclockwise direction in fig. 14 under the action of the fourth elastic member 39, so that the second pin 62 slides below the free end 71 of the driving rod 7, and the driving rod is kept at the locking position.

The cabinet door interlocking device can ensure that the cabinet door cannot be closed and the main loop cannot be switched on when the grounding switch-off occurs, so that the logic requirement of OPTIONA 2 can be met. In addition, all logic requirements of door interlocking can be realized only by opening and closing the cabinet door by the cabinet door interlocking device, the operation is simple, the risk of misoperation is reduced, and the performance is reliable.

Moreover, the above-disclosed technical features are not limited to the combinations with other features disclosed, and other combinations between the technical features can be performed by those skilled in the art according to the purpose of the invention to achieve the purpose of the invention.

Claims (26)

1. A cabinet door interlocking device of a load switch cabinet, the load switch cabinet comprises a cabinet body (31), a cabinet door (34) covering the cabinet body and a three-position mechanism (26) arranged in the cabinet body, and is characterized in that the cabinet door interlocking device (100) comprises:

the door locking piece (3) is arranged on a cabinet door (34) of the load switch cabinet and can move along with the cabinet door;

a bottom seat (23) arranged on the cabinet body (31);

the top seat (4) is arranged on the three-station mechanism;

a first transmission assembly (1) extending in a height direction of the cabinet (31) and movably disposed on the bottom seat (23) and the top seat (4), a first end of the first transmission assembly (1) being disposed near the door latch (3), a second end of the first transmission assembly (1) being located near a ground switch mechanism of the three-position mechanism (26), and the first transmission assembly (1) being configured to be driven by the door latch (3) to move in a first direction and a second direction parallel to the height direction and opposite to each other; and

a second transmission assembly (2) extending in a height direction of the cabinet body (31) and movably disposed on the bottom seat (23) and the first transmission assembly (1), a first end of the second transmission assembly (2) being disposed near the door latch (3), a second end of the second transmission assembly (2) being disposed near the ground switch mechanism, and the second transmission assembly (2) being configured to be drivable by the first transmission assembly (1) and the door latch (3) to move in the first direction and the second direction and to be engageable with or disengageable from the first transmission assembly (1),

wherein, when the load switch cabinet is in a grounding and closing state, the transmission part (35) of the grounding switch mechanism avoids the second end of the second transmission assembly (2), so that:

during opening of the cabinet door, the door lock moves an unlocking distance in the first direction such that the first transmission assembly moves in the first direction from a first initial position and drives the second transmission assembly engaged with the first transmission assembly to move in the first direction from a second initial position, then the second transmission assembly separates from the first transmission assembly and moves back to the second initial position in the second direction and the first transmission assembly continues to move in the first direction to a first end position, and then the door lock moves in a door opening direction with the cabinet door such that the second transmission assembly moves from the second initial position in the first direction to a second end position and then moves back to the second initial position in the second direction, and

during closing of the cabinet door, the door lock moves with the cabinet door in a door closing direction such that the first transmission assembly moves in a second direction from a first end position and the second transmission assembly moves in the first direction from a second initial position to a second end position, then the second transmission assembly moves back to the second initial position in the second direction, and then the door lock moves an unlocking distance in the second direction such that the first transmission assembly moves further in the second direction to the first initial position and the second transmission assembly engages with the first transmission assembly; and

when the load switch cabinet is in a grounding opening state, the transmission part (35) of the grounding switch mechanism moves to be close to the second end of the second transmission assembly (2) and is separated from the second end of the second transmission assembly by a gap, so that the second transmission assembly cannot move to a second termination position along a first direction, and the cabinet door cannot be opened or closed.

2. A cabinet door interlock according to claim 1, characterized in that the second transmission assembly (2) is movable back to the second initial position in the second direction under the influence of its gravity.

3. A cabinet door interlock according to claim 2, characterized in that the second transmission assembly (2) is also movable back to the second initial position in the second direction under the influence of the elastic member.

4. The cabinet door interlock according to claim 1 or 2, characterized in that the cabinet door interlock (100) further comprises a drive assembly configured to drive the second transmission assembly (2) to move in the first direction from a second initial position to the second end position when the door lock (3) moves in the door opening or closing direction.

5. The cabinet door interlock according to claim 4, characterized in that the driving assembly is located near a first end of the second transmission assembly (2) and comprises a first rotation shaft (19) provided on the bottom seat (23), a first rotation member (18) abutting against the first end of the second transmission assembly (2) and rotatable about the first rotation shaft (19), a driving portion (42) provided on the door lock (3), and a first elastic member (37) provided between the bottom seat (23) and the first rotation member (18) and exerting an elastic biasing force on the first rotation member (18),

wherein the first rotating member (18) is engaged with the driving portion (42) such that when the door latch (3) moves in the door opening direction or the door closing direction, the first rotating member rotates in the third direction from the first initial rotation position to the first end rotation position under the elastic biasing force of the first elastic member (37), thereby driving the second transmission assembly to move in the first direction from the second initial position to the second end rotation position; and when the second transmission assembly moves from the second end position to the second initial position along the second direction, the first rotating member (18) rotates from the first rotation end position to the first rotation initial position along the direction opposite to the third direction under the action of the second transmission assembly (2) and overcoming the elastic biasing force of the first elastic member (37).

6. A cabinet door interlock according to claim 5, wherein the first rotary member (18) is provided with a follower portion (43) cooperating with the driving portion (42), the follower portion and the first resilient member (37) being provided at opposite ends of the first rotary member with respect to the first rotation axis, respectively.

7. The cabinet door interlock according to claim 1 or 2, characterized in that it further comprises a retaining assembly configured to be able to retain the first transmission assembly (1) in the first end position after the cabinet door (34) is opened.

8. A cabinet door interlock according to claim 7, characterized in that the retaining assembly is located near a first end of the first transmission assembly (1) and comprises a second rotation axis (44) arranged on the bottom seat (23), a second rotation member (24) rotatable about the second rotation axis and a second resilient member (21) connected between the bottom seat (23) and the second rotation member (24) and exerting a resilient biasing force on the second rotation member (24),

wherein the second rotating member (24) is rotated in a fourth direction from a second rotation end position to a second rotation initial position by an elastic biasing force of the second elastic member (21) when the door latch (3) is moved in the door opening direction,

wherein the second rotating member (24) is rotated in a direction opposite to the fourth direction from a second rotation initial position to a second rotation end position against the resilient biasing force of the second resilient member (21) by the door latch (3) when the door latch (3) is moved in the door-closing direction, and

wherein the first transmission assembly (1) remains in the first end position when the second rotary member (24) is in the second initial position of rotation.

9. A cabinet door interlock according to claim 8, characterized in that the second rotary member (24) is subjected to a force exceeding the dead point when the second rotary member (24) is in the second initial position of rotation.

10. The cabinet door interlock according to claim 1 or 2, further comprising an engagement assembly configured to engage or disengage the first transmission assembly (1) from the second transmission assembly (2).

11. The cabinet door interlock according to claim 10, characterized in that the engagement assembly comprises a third rotation axis (10) and a third rotation member (12) provided on the first transmission assembly (1), a protrusion (45) provided on the second transmission assembly (2), a third resilient member (38) provided between the third rotation member (12) and the first transmission assembly (1) and exerting a resilient biasing force on the third rotation member (12), and a stopper portion (9) provided on the top seat (4),

wherein, when the first transmission assembly (1) moves in the first direction, the third rotating member (12) rotates in the fifth direction against the elastic biasing force of the third elastic member (38) under the block of the stopper portion (9) to be separated from the projection (45), and

wherein, when the first transmission assembly (1) moves in the second direction, the third rotating member (12) rotates in a direction opposite to the fifth direction by the elastic biasing force of the third elastic member (38), thereby engaging with the projection (45).

12. A cabinet door interlock according to claim 11, characterized in that the free end of the third rotary member (12) has a hook portion (46) configured to hook the projection (45) to engage the first transmission assembly (1) with the second transmission assembly (2).

13. A cabinet door interlock according to claim 12, characterized in that the hook (46) comprises a guide (59) extending from its body away from the third rotation axis (10), which guide is configured to enable the third rotation member (12) to rotate in the fifth direction after having rotated with the third rotation member (12) in a direction opposite to the fifth direction to abut against the protrusion (45), thereby causing the hook (46) to hook the protrusion (45) from below.

14. A cabinet door interlock according to claim 12, characterized in that the end of the third rotation member (12) opposite to the free end is configured to be able to abut against the stop portion (9) when the third rotation member (12) is rotated.

15. A cabinet door interlock according to claim 11, characterized in that the force experienced by the third rotational member (12) exceeds dead center when the third rotational member (12) engages with the projection (45).

16. The cabinet door interlock according to claim 1 or 2, characterized in that the cabinet door interlock (100) further comprises a primary circuit locking assembly configured to keep a primary circuit switch operating aperture of the three-position mechanism (26) shielded when the load switch cabinet is in a ground opening state.

17. The cabinet door interlock according to claim 16, wherein the primary circuit locking assembly is located near the second end of the first transmission assembly (1) and comprises a drive rod (7), a fourth rotation shaft (47), a fourth rotation member (6), a stopper (20) and a fourth resilient member (39), the drive rod (7) being movably disposed on the top seat (4) and connected with the ground catch (29) of the ground switch operating aperture of the three-position mechanism (26), the fourth rotation shaft (47) being disposed on the top seat (4), the fourth rotational member (6) being rotatable about the fourth rotation shaft, the stopper (20) being disposed at the second end of the first transmission assembly (1), the fourth resilient member (39) being connected between the top seat (4) and the fourth rotational member (6) and exerting a resilient biasing force on the fourth rotational member,

wherein, when the first transmission assembly (1) is located at the first initial position, the fourth rotating member (6) is located at the fourth rotation ending position against the elastic biasing force of the fourth elastic member (39) under the action of the stopper (20) and the driving rod (7), and the driving rod (7) can move along with the grounding baffle (29) between a locking position for exposing the grounding switch operation hole to shield the main circuit switch operation hole and an unlocking position for shielding the grounding switch operation hole; and

when the first transmission assembly (1) is located at the first termination position and the driving rod (7) is located at the locking position, the fourth rotating member (6) is located at the fourth rotation initial position under the elastic biasing force of the fourth elastic member and keeps the driving rod (7) at the locking position.

18. A cabinet door interlock according to claim 17, characterized in that a first pin (61) is provided on the fourth rotation member (6), the stop (20) being capable of abutting against the first pin (61) to hold the fourth rotation member (6) in the fourth rotation end position when the first transmission assembly (1) is in the first initial position.

19. A cabinet door interlock according to claim 18, characterized in that a second pin (62) is also provided on the fourth rotary member (6), the second pin (62) being capable of abutting against the drive lever (7) to retain the drive lever in the locked position when the first transmission assembly (1) is in the first end position and the drive lever (7) is in the locked position.

20. A cabinet door interlock according to claim 19, characterized in that said primary circuit locking assembly further comprises a first slot (50) and a second slot (51) provided on said top seat (4) and communicating with each other, the free end of said driving rod (7) being slidable in said first slot (50), said second pin (62) being slidable in said second slot (51).

21. The cabinet door interlock according to claim 1, characterized in that the first transmission assembly (1) and the second transmission assembly (2) are respectively arranged on opposite sides of the body of the bottom seat (23).

22. The cabinet door interlock according to claim 1, characterized in that the first transmission assembly (1) and/or the second transmission assembly (2) comprise a plurality of transmission elements connected to each other.

23. The cabinet door interlock according to claim 22, characterized in that at least one of the plurality of transmission elements of the first transmission assembly (1) and/or the plurality of transmission elements of the second transmission assembly (2) is provided with at least one hole extending in the first direction.

24. A cabinet door interlock according to claim 1, wherein the cabinet body (31) comprises a front frame (32) disposed in front of the gas box (30) of the load switch cabinet and a bottom frame (33) located below the gas box (30), the bottom seat (23) being disposed on the front frame and the bottom frame.

25. A cabinet door interlock according to claim 1, characterized in that a protrusion (53) is provided at the first end of the first transmission assembly (1), and a recess (54) is provided on the door lock (3) to cooperate with the protrusion, wherein the door lock (3) drives the first transmission assembly (1) to move by the protrusion provided in the recess when moving in the first direction or the second direction.

26. A load switchgear cabinet, characterized in that it comprises a cabinet door interlock according to any of claims 1 to 25.

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