An interlocking mechanism and a switchgear cabinet

Abstract

The present invention discloses an interlocking mechanism and a switch cabinet, belonging to the technical field of high-voltage switchgear. The interlocking mechanism includes an interlocking rod, a displacement interlocking elastic member, a first interlocking component and a locking component. The first interlocking component is connected to the first crank arm of a three-position switch; the locking component includes a locking rod, a linkage member, a transition member and a locking elastic member. The first end of the locking rod, the linkage member and the transition member are sequentially connected, and the second end of the locking rod is connected to the locking crank arm of the circuit breaker. The linkage member is connected to the interlocking rod. When the first crank arm rotates from the isolation position to the grounding position, the transition member can be pushed from the first intermediate position to the second intermediate position through the first interlocking component. The interlocking rod abuts against the closed cabinet door at the first position. When the cabinet door is opened emergently, the interlocking rod is at the second position, the transition member is at the first intermediate position, and the locking crank arm is at the unlocking position, and the circuit breaker can trip; when the cabinet door is opened normally, the transition member is at the second intermediate position, the locking crank arm is at the locking position, and the circuit breaker cannot trip.

Description

Technical Field

[0001] The present invention relates to the technical field of high-voltage switchgear, and particularly to an interlocking mechanism and a switch cabinet. Background Art

[0002] A switch cabinet is an electrical device, and its main function is to switch on, off, control, and protect electrical equipment during the processes of power generation, transmission, distribution, and power conversion in the power system. Among them, the circuit breaker and the three-position switch mechanism are the core components of the switch cabinet, which are electrical devices used to connect and disconnect circuits. The circuit breaker has two states: closing and opening; the three-position switch has three positions: connecting, isolating, and grounding.

[0003] Currently, the cabinet door of the switch cabinet is far from the three-position switch and the circuit breaker, and a mechanical interlocking mechanism with a steel wire rope is usually used to achieve transmission among the three. In the related art, the mechanical interlocking mechanism includes leading a steel wire rope from the cabinet door to the circuit breaker to lock the opening function of the circuit breaker, so as to achieve the purpose that the circuit breaker cannot be opened when the cabinet door is not closed. And through the original mechanical interlock between the circuit breaker and the three-position switch, the grounded three-position switch cannot be operated. Therefore, when the cabinet door is not closed, the main circuit in the cabinet is reliably grounded through the closed circuit breaker and the grounded three-position switch. However, in the normal power transmission state where the three-position switch is in the connecting state and the circuit breaker is in the closing state, there will be a situation where it is necessary to urgently open the cabinet door for maintenance. After the cabinet door is urgently opened, the interlocking mechanism immediately locks the opening function of the circuit breaker. At this time, the circuit breaker cannot be urgently opened. If it is necessary to operate the circuit breaker to open, there are only two methods, that is, closing the cabinet door or manually operating the locking crank arm of the circuit breaker to release the opening lock. No matter which method is used, it takes a certain amount of time, and neither is a normal operation, which poses a great safety hazard. Summary of the Invention

[0004] An object of the present invention is to provide an interlocking mechanism, in which the circuit breaker can be normally opened when the cabinet door is urgently opened, which is safe and reliable.

[0005] To achieve this purpose, the present invention adopts the following technical solutions:

[0006] Provide an interlocking mechanism applied to a switch cabinet. The switch cabinet includes a cabinet body, a cabinet door, a three-position switch and a circuit breaker arranged in the cabinet body. The three-position switch includes a first crank arm, and the circuit breaker includes a locking crank arm. The interlocking mechanism includes:

[0007] An interlocking rod that has a first position and a second position when moving along the axial direction;

[0008] The interlocking rod abuts against the closed cabinet door at the first position;

[0009] A displacement interlock elastic member is connected to the interlock rod. When the cabinet door is closed, the displacement interlock elastic member causes the interlock rod to have a tendency to move from the first position towards the second position;

[0010] A first interlock assembly is connected to the first crank arm;

[0011] A locking assembly includes a locking rod, a linkage member, a transition member, and a locking elastic member. The first end of the locking rod, the linkage member, and the transition member are connected in sequence, and the second end of the locking rod is connected to the locking crank arm. The linkage member is connected to the interlock rod, and the transition member is connected to the locking elastic member;

[0012] Wherein, when the first crank arm rotates from the isolation position to the grounding position, the first crank arm can push the transition member from the first intermediate position to the second intermediate position through the first interlock assembly; and when the first crank arm is located at the grounding position, the locking elastic member causes the transition member to have a tendency to convert from the second intermediate position towards the first intermediate position;

[0013] When the first crank arm is located at the connection position, the first interlock assembly is separated from the transition member, and the transition member is located at the first intermediate position;

[0014] When the transition member is located at the first intermediate position, and the interlock rod is located at the first position or the second position, the locking crank arm is located at the unlocking position. And when the locking crank arm is located at the unlocking position, the circuit breaker can trip;

[0015] When the transition member is located at the second intermediate position, and the interlock rod moves from the first position to the second position, the interlock rod, the linkage member, the locking rod, and the locking crank arm are pushed in sequence, and the locking crank arm rotates from the unlocking position to the locking position. The locking crank arm at the locking position can limit the circuit breaker from tripping.

[0016] Optionally, the locking rod, the linkage member, and the transition member are hinged in sequence. A linkage groove is provided on the linkage member. The interlock rod includes an interlock main body rod and a dial plate fixed on the interlock main body rod. The dial plate extends into the linkage groove; and when the interlock rod moves between the first position and the second position, the dial plate can push against the groove wall of the linkage groove to drive the linkage member to rotate.

[0017] Optionally, a first support frame is provided on the cabinet body. A first limiting hole is provided on the first support frame. The interlock rod passes through the first limiting hole. Both the transition member and the locking elastic member are connected to the first support frame.

[0018] Optionally, along the length direction of the transition piece, a pressure-receiving part, a first hinged part, a second hinged part and a connecting part are sequentially arranged. The first interlock assembly can push the transition piece from the first intermediate position to the second intermediate position by pushing against the pressure-receiving part. The connecting part is connected to the locking elastic part. The first hinged part is hinged to the first support frame, and the second hinged part is hinged to the linkage part.

[0019] Optionally, the first interlock assembly includes:

[0020] A first connecting rod, the first end of which is hinged to the first crank arm;

[0021] A first slider, which is hinged to the second end of the first connecting rod and is slidably connected to the first support frame;

[0022] A connecting shaft, the second end of the first connecting rod is hinged to the first slider through the connecting shaft;

[0023] Wherein, the first interlock assembly can push the transition piece by the first slider or the connecting shaft.

[0024] Optionally, the first end of the interlock rod penetrates through the first limiting hole. A second support frame is provided on the cabinet body. A second limiting hole is provided on the second support frame. The second end of the interlock rod penetrates through the second limiting hole, and the displacement interlock elastic part is arranged between the interlock rod and the second support frame.

[0025] Optionally, the first interlock assembly has a first limiting surface and a first transition surface that are connected to each other;

[0026] The interlock mechanism further includes:

[0027] A second interlock assembly, which is connected to the second crank arm of the circuit breaker. The second interlock assembly has a second limiting surface and a second transition surface that are connected to each other;

[0028] A deflection interlock elastic part, which is connected to the interlock rod. The interlock rod rotates axially to have a first angle and a second angle. When the interlock rod is at the first angle, the deflection interlock elastic part makes the interlock rod have a tendency to rotate from the first angle to the second angle. The interlock rod is clamped with the closed cabinet door at the first angle, and the interlock rod is disengaged from the clamping with the closed cabinet door at the second angle;

[0029] When the first crank arm is at the isolation position or the on position, the interlock rod is maintained at the first angle by abutting against the first limiting surface;

[0030] When the second toggle arm is in the opening position, the interlocking rod abuts against the second limiting surface to maintain the first angle;

[0031] When the first toggle arm is in the grounding position and the second toggle arm is in the closing position, the interlocking rod abuts against at least one of the first transition surface and the second transition surface to maintain the second angle.

[0032] Optionally, the interlocking rod includes an interlocking main body rod and a first limiting member fixed on the interlocking main body rod. The interlocking main body rod can abut against the first limiting surface through the first limiting member to maintain the first angle, and the interlocking main body rod can abut against the first transition surface through the first limiting member to maintain the second angle;

[0033] And / or, the first interlocking assembly includes:

[0034] A first connecting rod, the first end of the first connecting rod is hinged to the first toggle arm;

[0035] A first slider, which is hinged to the second end of the first connecting rod and is slidably connected to the cabinet body. The first slider has the first limiting surface and the first transition surface.

[0036] Optionally, the interlocking rod includes an interlocking main body rod and a second limiting member fixed on the interlocking main body rod. The interlocking main body rod can abut against the second limiting surface through the second limiting member to maintain the first angle, and the interlocking main body rod can abut against the second transition surface through the second limiting member to maintain the second angle;

[0037] And / or, the second interlocking assembly includes:

[0038] A second connecting rod, the first end of the second connecting rod is hinged to the second toggle arm;

[0039] A second slider, which is hinged to the second end of the second connecting rod and is slidably connected to the cabinet body. The second slider has the second limiting surface and the second transition surface.

[0040] Optionally, a first clamping member is detachably connected to the cabinet door, and a second clamping member is arranged on the interlocking rod. When the locking toggle arm is in the unlocking position, the first clamping member arranged on the cabinet door is clamped with the second clamping member.

[0041] Another object of the present invention is to further provide a switch cabinet, including a cabinet body, a cabinet door, a three-position switch, a circuit breaker and the above-mentioned interlocking mechanism. The cabinet door is arranged on the cabinet body, and the three-position switch and the circuit breaker are both arranged in the cabinet body.

[0042] Beneficial effects: For the interlocking mechanism provided by the present invention, when it is necessary to open the cabinet door for maintenance in an emergency state, such as the state when the first toggle arm is in the on position or the isolation position, the transition member is in the first intermediate position to keep the locking toggle arm in the unlocked position; at this time, the circuit breaker can be tripped, that is, the tripping lock can be released without manual operation and without spending time, which is safe and reliable.

[0043] And in the emergency state and when the cabinet door is open, before maintenance, it is necessary to first trip the circuit breaker, then rotate the first toggle arm to the grounding position, and finally close the circuit breaker. During the above process, because the cabinet door is open, the interlocking rod moves to the second position under the action of the displacement interlocking elastic member. Rotating the first toggle arm to the grounding position can cause the first interlocking assembly to push the transition member to the second intermediate position, and under the sequential contact of the interlocking rod, the linkage member, the locking rod and the locking toggle arm, the locking toggle arm rotates to the locking position to limit the tripping of the circuit breaker. After closing the circuit breaker, the purpose of the safe door-opening state where the cabinet door cannot be closed and the circuit breaker cannot be tripped is achieved.

[0044] In the safe door-opening state, when closing the cabinet door, the cabinet door pushes the interlocking rod to the first position. At this time, the circuit breaker can be tripped first, then the first toggle arm is rotated to the on position, and finally the circuit breaker is closed to resume power supply.

[0045] In addition, when it is necessary to open the cabinet door for maintenance under normal circumstances, the circuit breaker can be tripped first, then the first toggle arm is rotated to the isolation position and the grounding position in sequence, and finally the circuit breaker is closed. At this time, the cabinet door can be opened. And when the first toggle arm is in the grounding position, the transition member can be kept in the second intermediate position. When opening the cabinet door, the interlocking rod moves from the first position to the second position, and the interlocking rod, the linkage member, the locking rod and the locking toggle arm are sequentially pushed, which can cause the locking toggle arm to rotate from the unlocked position to the locking position, achieving the purpose of the safe door-opening state where the cabinet door cannot be closed and the circuit breaker cannot be tripped.

[0046] The switch cabinet provided by the present invention, through the setting of the interlocking mechanism, after the cabinet door is opened emergently, the circuit breaker can be tripped normally, which is safe and reliable. Description of the Drawings

[0047] Figure 1 is a schematic diagram of the internal structure of the switch cabinet provided by the present invention;

[0048] Figure 2 is a schematic diagram of a perspective view of a partial structure of the switch cabinet provided by the present invention;

[0049] Figure 3 is provided by the present invention Figure 2 The enlarged view at A in

[0050] Figure 4 is a schematic diagram of a partial structure of the switch cabinet provided by the present invention when the three-position switch is on and the circuit breaker is closed;

[0051] Figure 5 provided by the present invention Figure 4 The enlarged view at position B in

[0052] Figure 6 is a partial structural schematic diagram of the switchgear provided by the present invention when the three-position switch is closed and the circuit breaker is tripped;

[0053] Figure 7 provided by the present invention Figure 6 The enlarged view at position C in

[0054] Figure 8 is a partial structural schematic diagram of the switchgear provided by the present invention when the three-position switch is in isolation and the circuit breaker is tripped;

[0055] Figure 9 provided by the present invention Figure 8 The enlarged view at position D in

[0056] Figure 10 is a partial structural schematic diagram of the switchgear provided by the present invention when the three-position switch is grounded and the circuit breaker is tripped;

[0057] Figure 11 provided by the present invention Figure 10 The enlarged view at position E in

[0058] Figure 12 is a partial structural schematic diagram of the switchgear provided by the present invention when the three-position switch is grounded and the circuit breaker is closed;

[0059] Figure 13 provided by the present invention Figure 12 The enlarged view at position F in

[0060] Figure 14 is a partial structural schematic diagram of the switchgear provided by the present invention when the locking crank arm is locked;

[0061] Figure 15 provided by the present invention Figure 14 The enlarged view at position G in

[0062] Figure 16 is a partial structural schematic diagram of the switchgear provided by the present invention when the emergency door is opened;

[0063] Figure 17 provided by the present invention Figure 16 The enlarged view at position H in

[0064] Figure 18 is a structural schematic diagram of the locking rod provided by the present invention;

[0065] Figure 19 is a schematic diagram of another perspective of the partial structure of the switchgear provided by the present invention;

[0066] Figure 20 is a schematic structural diagram of the interlocking rod provided by the present invention;

[0067] Figure 21 is a schematic structural diagram of the first support frame provided by the present invention;

[0068] Figure 22 is a schematic structural diagram of the second support frame provided by the present invention;

[0069] Figure 23 is a schematic structural diagram of the transition piece provided by the present invention;

[0070] Figure 24 is a schematic structural diagram of the linkage provided by the present invention;

[0071] Figure 25 is a schematic structural diagram of the first interlocking assembly at the first slider provided by the present invention;

[0072] Figure 26 is a schematic structural diagram of the first connecting rod provided by the present invention;

[0073] Figure 27 is a schematic structural diagram of the second interlocking assembly at the second slider provided by the present invention;

[0074] Figure 28 is a schematic structural diagram of the second connecting rod provided by the present invention;

[0075] Figure 29 is an enlarged view of the cabinet door at the first engaging member provided by the present invention.

[0076] In the figure:

[0077] 110, cabinet body; 120, cabinet door; 121, first engaging member; 1211, fixing plate portion; 1212, engaging plate portion; 1213, positioning plate portion; 130, three-position switch; 131, first crank arm; 140, circuit breaker; 141, second crank arm; 142, locking crank arm; 150, first support frame; 151, first limiting hole; 152, first sliding hole; 153, connecting ear; 154, first hole; 155, second hole; 156, second sliding hole; 160, second support frame; 161, second limiting hole;

[0078] 200, interlocking rod; 210, interlocking main rod; 211, annular groove; 220, dial plate; 230, limiting pin; 240, first limiting member; 250, second limiting member; 260, second engaging member;

[0079] 310, displacement interlocking elastic member; 320, deflection interlocking elastic member; 321, first interlocking elastic member; 322, second interlocking elastic member;

[0080] 400, the first interlock assembly; 410, the first connecting rod; 411, the first threaded rod; 412, the first screw sleeve rod; 413, the first nut; 420, the first slider; 421, the first limiting surface; 422, the first relief groove; 4221, the first transition surface; 430, the connecting shaft;

[0081] 500, the locking assembly; 510, the locking rod; 511, the main locking body rod; 512, the stepped rod; 513, the fastening sleeve; 520, the linkage member; 521, the linkage groove; 522, the first linkage hinge portion; 523, the second linkage hinge portion; 530, the transition member; 531, the pressure-receiving portion; 532, the first hinge portion; 533, the second hinge portion; 534, the connecting portion; 540, the locking elastic member;

[0082] 600, the second interlock assembly; 610, the second connecting rod; 611, the second threaded rod; 612, the second screw sleeve rod; 613, the second nut; 620, the second slider; 621, the second limiting surface; 622, the second relief groove; 6221, the second transition surface. Detailed implementation manners

[0083] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the present invention, rather than limiting the present invention. In addition, it should be noted that, for the sake of description, only parts related to the present invention rather than all structures are shown in the drawings.

[0084] In the description of the present invention, unless otherwise clearly defined and limited, the terms "connected", "connected to", and "fixed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the internal communication of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0085] In the present invention, unless otherwise clearly defined and limited, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through other features therebetween. Moreover, the first feature being "above", "above and over", and "on the top of" the second feature includes that the first feature is directly above and obliquely above the second feature, or simply means that the first feature has a higher horizontal height than the second feature. The first feature being "below", "below and under", and "under the bottom of" the second feature includes that the first feature is directly below and obliquely below the second feature, or simply means that the first feature has a lower horizontal height than the second feature.

[0086] In the description of this embodiment, the orientation or positional relationships such as "upper", "lower", "right", etc. are based on the orientation or positional relationships shown in the drawings. They are only for the convenience of description and simplifying the operations, rather than indicating or implying that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0087] Referring to Figures 1 to 17 As shown, this embodiment provides an interlocking mechanism applied to a switch cabinet.

[0088] Specifically, the switch cabinet includes a cabinet body 110, a cabinet door 120, a three-position switch 130 and a circuit breaker 140 disposed inside the cabinet body 110. The three-position switch 130 includes a first crank arm 131, and the circuit breaker 140 includes a second crank arm 141 and a locking crank arm 142.

[0089] In this embodiment, the first crank arm 131 rotates and sequentially has an on position, an isolation position, and a grounding position. The second crank arm 141 rotates and has a closing position and a tripping position. The locking crank arm 142 rotates and has a locking position and an unlocking position. It can be understood that when the first crank arm 131 is in the on position, the three-position switch 130 is in the on state; when the first crank arm 131 is in the isolation position, the three-position switch 130 is in the isolation state; when the first crank arm 131 is in the grounding position, the three-position switch 130 is in the grounding state. When the second crank arm 141 is in the closing position, the circuit breaker 140 is in the closing state; when the second crank arm 141 is in the tripping position, the circuit breaker 140 is in the tripping state. When the locking crank arm 142 is in the locking position, it can limit the tripping of the circuit breaker 140, and when the locking crank arm 142 is in the unlocking position, the circuit breaker 140 can trip.

[0090] Specifically, the interlocking mechanism includes an interlocking rod 200, a displacement interlocking elastic member 310, a first interlocking assembly 400, and a locking assembly 500.

[0091] Specifically, the interlocking rod 200 moves axially and has a first position and a second position; the interlocking rod 200 abuts against the closed cabinet door 120 at the first position; the displacement interlocking elastic member 310 is connected to the interlocking rod 200. When the cabinet door 120 is closed, the displacement interlocking elastic member 310 causes the interlocking rod 200 to have a tendency to move from the first position towards the second position. Exemplarily, the movement of the interlocking rod 200 from the first position towards the second position can be the interlocking rod 200 moving outwards from the cabinet body 110. It can be understood that the displacement interlocking elastic member 310 provides a force for the interlocking rod 200 to abut against the cabinet door 120.

[0092] Specifically, the first interlocking assembly 400 is connected to the first crank arm 131.

[0093] Specifically, the locking assembly 500 includes a locking rod 510, a linkage member 520, a transition member 530, and a locking elastic member 540. The first end of the locking rod 510, the linkage member 520, and the transition member 530 are connected in sequence, and the second end of the locking rod 510 is connected to the locking crank arm 142. The linkage member 520 is connected to the interlocking rod 200, and the transition member 530 is connected to the locking elastic member 540.

[0094] When the first crank arm 131 rotates from the isolation position to the grounding position, the first crank arm 131 can push the transition member 530 from the first intermediate position to the second intermediate position through the first interlocking assembly 400; and when the first crank arm 131 is in the grounding position, the locking elastic member 540 makes the transition member 530 tend to switch from the second intermediate position to the first intermediate position.

[0095] When the first crank arm 131 is in the on position, the first interlocking assembly 400 is separated from the transition member 530, and the transition member 530 is in the first intermediate position.

[0096] When the transition member 530 is in the first intermediate position, and the interlocking rod 200 is in the first position or the second position, the locking crank arm 142 is in the unlocked position.

[0097] When the transition member 530 is in the second intermediate position, and the interlocking rod 200 moves from the first position to the second position, the interlocking rod 200, the linkage member 520, the locking rod 510, and the locking crank arm 142 are pushed in sequence, and the locking crank arm 142 rotates from the unlocked position to the locked position.

[0098] Exemplarily, when it is necessary to open the cabinet door 120 for maintenance in an emergency state, the cabinet door 120 gives way to the interlocking rod 200, and the interlocking rod 200 moves from the first position to the second position under the action of the displacement interlocking elastic member 310; and the transition member 530 is in the first intermediate position. Exemplarily, the emergency state can be that the three-position switch 130 is in the on state or the isolation state. When the cabinet door 120 is opened in an emergency state, the transition member 530 being in the first intermediate position keeps the locking crank arm 142 in the unlocked position, and when the locking crank arm 142 is in the unlocked position, the circuit breaker 140 can trip, that is, the trip lock can be released without manual operation and without spending time, which is safe and reliable.

[0099] And in the emergency state and when the cabinet door 120 is open, before maintenance, the circuit breaker 140 needs to be tripped first, then the first toggle arm 131 is rotated to the grounded position, and finally the circuit breaker 140 is closed. In the above process, since the cabinet door 120 is open, the interlock rod 200 moves to the second position under the action of the displacement interlock elastic member 310. Rotating the first toggle arm 131 to the grounded position can cause the first interlock assembly 400 to push the transition member 530 to the second intermediate position. And under the sequential abutment of the interlock rod 200, the linkage member 520, the locking rod 510, and the locking toggle arm 142, the locking toggle arm 142 rotates to the locked position to limit the tripping of the circuit breaker 140. After closing the circuit breaker 140, the purpose of the safe door-opening state where the cabinet door 120 cannot be closed and the circuit breaker 140 cannot be tripped is achieved.

[0100] In the safe door-opening state, when closing the cabinet door 120, the cabinet door 120 pushes the interlock rod 200 to the first position. At this time, the circuit breaker 140 can be tripped first, then the first toggle arm 131 is rotated to the connected position, and finally the circuit breaker 140 is closed to resume power supply.

[0101] When it is necessary to open the cabinet door 120 for maintenance under normal circumstances, the circuit breaker 140 can be tripped first, then the first toggle arm 131 is rotated to the isolation position and the grounded position in sequence, and finally the circuit breaker 140 is closed. At this time, the cabinet door 120 can be opened. And the first toggle arm 131 being in the grounded position can keep the transition member 530 in the second intermediate position. When opening the cabinet door 120, the interlock rod 200 moves from the first position to the second position. The sequential abutment of the interlock rod 200, the linkage member 520, the locking rod 510, and the locking toggle arm 142 can cause the locking toggle arm 142 to rotate from the unlocked position to the locked position, achieving the purpose of the safe door-opening state where the cabinet door 120 cannot be closed and the circuit breaker 140 cannot be tripped.

[0102] In addition, by identifying the position of the locking toggle arm 142, it can be determined whether the opened cabinet door 120 is in a safe door-opening state or an emergency door-opening state.

[0103] In a feasible implementation manner, such as Figure 2 and Figure 18As shown, a perforation is provided on the locking crank arm 142. The locking rod 510 includes a locking main body rod 511 and a stepped rod 512. The first end of the locking main body rod 511 is connected to the linkage member 520, and the second end of the locking main body rod 511 is connected to the large end of the stepped rod 512. The small end of the stepped rod 512 passes through the perforation. It can be understood that the locking rod 510 can push the locking crank arm 142 from the unlocked position towards the locked position through the stepped surface of the stepped rod 512. Exemplarily, when the transition member 530 is in the first intermediate position, during the process of the interlocking rod 200 moving from the first position to the second position, the small end of the locking rod 510 slides relative to the perforation, and the stepped surface of the locking rod 510 does not contact the locking crank arm 142, or the stepped surface of the stepped rod 512 just contacts the locking crank arm 142 when the locking rod 510 is in the second position, which facilitates keeping the locking crank arm 142 in the unlocked position when opening the cabinet door 120 in an emergency state, and is stable and reliable. Of course, the locking crank arm 142 can also be of other structures. For example, a guiding hole is provided on the circumferential side of the locking rod 510, and the locking crank arm 142 is provided with a guiding shaft passing through the guiding hole, and the wall of the guiding hole pushes or gives way to the guiding shaft to realize the linkage between the locking rod 510 and the locking crank arm 142.

[0104] In some embodiments, the length of the locking rod 510 is adjustable. By adjusting the length of the locking rod 510, the locking rod 510 can meet the interlocking function of the locking assembly 500. Exemplarily, the locking main body rod 511 and the stepped rod 512 can be threadedly connected. A fastening sleeve 513 is threadedly connected to the second end of the locking main body rod 511. By squeezing the large end of the stepped rod 512 with the fastening sleeve 513, the locking main body rod 511 and the stepped rod 512 are fixed together.

[0105] In this embodiment, referring to Figure 1 、 Figures 18 to 20 As shown, the locking rod 510, the linkage member 520, and the transition member 530 are sequentially hinged. A linkage groove 521 is provided on the linkage member 520. The interlocking rod 200 includes an interlocking main body rod 210 and a dial plate 220 fixed on the interlocking main body rod 210. The dial plate 220 extends into the linkage groove 521, which is convenient for assembly, and the linkage of the locking assembly 500 is stable and reliable. It can be understood that when the interlocking rod 200 moves between the first position and the second position, the dial plate 220 can push the wall of the linkage groove 521 to drive the linkage member 520 to rotate, and then drive the locking rod 510 to act. Among them, the linkage member 520 can be a fork structure.

[0106] Exemplarily, when the transition member 530 is in the second intermediate position, during the process of the interlocking main body rod 210 moving from the first position to the second position, the dial plate 220 squeezes the wall of the linkage groove 521 to drive the linkage member 520 to rotate, and then drive the locking rod 510 to push the locking crank arm 142 to rotate to the locked position.

[0107] Exemplarily, when the transition member 530 is in the first intermediate position, during the movement of the interlocking rod 200 from the first position towards the second position, although the dial plate 220 drives the linkage member 520 to rotate, the linkage member 520 does not push the locking crank arm 142 during the process of driving the locking rod 510 to move, that is, the locking crank arm 142 remains in the unlocked position.

[0108] In some embodiments, the first intermediate position and the second intermediate position are the angular positions of the transition member 530 relative to the cabinet body 110, that is, the transition member 530 is hinged to the cabinet body 110. In other embodiments, the first intermediate position and the second intermediate position are the displacement positions of the transition member 530 relative to the cabinet body 110, that is, the transition member 530 is slidably connected to the cabinet body 110. Of course, the transition member 530 can also be connected to the cabinet body 110 by other connection methods, which are not limited in this embodiment.

[0109] In this embodiment, referring to Figure 1 , Figures 19 to 22 As shown in the figure, a first support frame 150 is provided on the cabinet body 110, and a first limit hole 151 is provided on the first support frame 150. The interlocking rod 200 is inserted through the first limit hole 151 so that the interlocking rod 200 can stably move along the axial direction. Among them, both the transition member 530 and the locking elastic member 540 are connected to the first support frame 150, which is convenient for assembly, has a compact structure, and is convenient for the forming and manufacturing of the cabinet body 110 and the first support frame 150. It can be understood that the transition member 530 can be limited and held at the first intermediate position by the first support frame 150, which is stable and reliable.

[0110] Exemplarily, the first support frame 150 can be in the shape of a rectangular box, including two relatively arranged first short sides and two relatively arranged first long sides, and the first limit hole 151 is provided on the first short side.

[0111] Exemplarily, two annular grooves 211 are provided at intervals on the interlocking main body rod 210. The first support frame 150 is located between the two annular grooves 211, or the two annular grooves 211 are located between the two first short sides. Elastic retaining rings (not shown) can be installed on the annular grooves 211, and a limit fit is formed between the elastic retaining rings and the first short sides to limit the movement of the interlocking rod 200, which is convenient for assembly.

[0112] In a feasible implementation, the first end of the interlocking rod 200 passes through the first limiting hole 151. A second support frame 160 is provided on the cabinet body 110, and a second limiting hole 161 is provided on the second support frame 160. The second end of the interlocking rod 200 passes through the second limiting hole 161, and the displacement interlocking elastic member 310 is arranged between the interlocking rod 200 and the second support frame 160. In this embodiment, the first support frame 150 and the second support frame 160 maintain a relatively large distance. The interlocking rod 200 passes through the first limiting hole 151 and the second limiting hole 161, which can enable the interlocking rod 200 to move stably along the axial direction, and connect the displacement interlocking elastic member 310 with the second support frame 160 to prevent the displacement interlocking elastic member 310 from interfering with the installation of other components of the interlocking mechanism.

[0113] Exemplarily, the first support frame 150 can be arranged in the front chamber of the cabinet body 110, and the second support frame 160 can be arranged in the rear chamber of the cabinet body 110.

[0114] Exemplarily, the second support frame 160 can be in the shape of a rectangular box, including two relatively arranged second short sides and two relatively arranged second long sides, and the second limiting hole 161 is provided on the second short side.

[0115] Exemplarily, the displacement interlocking elastic member 310 can be set as a spring. In this embodiment, a limiting pin 230 is radially penetrated through the second end of the interlocking rod 200. The displacement interlocking elastic member 310 is sleeved on the interlocking rod 200, and one end of the displacement interlocking elastic member 310 abuts against the limiting pin 230, and the other end abuts against one of the two second short sides close to the first support frame 150, which is convenient for assembly.

[0116] The interlocking mechanism provided in this embodiment is particularly suitable for the transformation of traditional switch cabinets. For example, when adding an interlocking function to a switch cabinet without a cabinet door interlocking function, only need to drill holes on the cabinet body to fix the first support frame 150 and the second support frame 160, and form two modules around the first support frame 150 and the second support frame 160. The adaptation is simple and easy, and there is no need to greatly disassemble and modify other structures inside the switch cabinet.

[0117] In this embodiment, refer to Figures 1 to 3 、 Figure 23As shown, the transition member 530 is successively provided with a pressure-receiving portion 531, a first hinge portion 532, a second hinge portion 533, and a connecting portion 534 along its own length direction. The first interlock assembly 400 can push the transition member 530 from the first intermediate position to the second intermediate position by pushing against the pressure-receiving portion 531. The connecting portion 534 is connected to the locking elastic member 540. The first hinge portion 532 is hinged to the first support frame 150, and the second hinge portion 533 is hinged to the linkage member 520, which facilitates the assembly of the transition member 530. It can be understood that the transition member 530 forms a lever structure with the first hinge portion 532 as the fulcrum, so that the distance between the second hinge portion 533 in the first intermediate position and the second hinge portion 533 in the second intermediate position is relatively large, ensuring that the locking crank arm 142 is stably held in the unlocked position when the transition member 530 is in the first intermediate position. In addition, the transition member 530 forms a lever structure with the first hinge portion 532 as the fulcrum, so that the locking elastic member 540 and the pressure-receiving portion 531 can drive the transition member 530 to rotate more labor-savingly.

[0118] Exemplarily, the pressure-receiving portion 531, the first hinge portion 532, the second hinge portion 533, and the connecting portion 534 can all be provided as columnar structures to facilitate assembly.

[0119] Specifically, as Figure 24 shown, the linkage member 520 is provided with a first linkage hinge portion 522 that can be hinged to the locking rod 510 and a second linkage hinge portion 523 that can be hinged to the transition member 530. Exemplarily, the first linkage hinge portion 522 can be a columnar structure, and the locking rod 510 has a hole-like structure for the first linkage hinge portion 522 to pass through, which facilitates hinging to the locking rod 510. Exemplarily, the second linkage hinge portion 523 is a hole-like structure for the second hinge portion 533 to pass through.

[0120] Exemplarily, on the first long side of the first support frame 150 close to the circuit breaker 140, there are provided a connecting ear 153 that can be hinged to the first hinge portion 532, a first hole 154 for the linkage member 520 to pass through, and a second hole 155 for the locking elastic member 540 to pass through. The locking elastic member 540 is connected to the first long side of the first support frame 150 away from the circuit breaker 140.

[0121] In this embodiment, referring to Figures 1 to 3 、 Figure 19 and Figure 21As shown, the first interlock assembly 400 includes a first connecting rod 410, a first slider 420, and a connecting shaft 430. The first end of the first connecting rod 410 is hinged to the first crank arm 131; the first slider 420 is hinged to the second end of the first connecting rod 410, and the first slider 420 is slidably connected to the cabinet body 110; the second end of the first connecting rod 410 is hinged to the first slider 420 through the connecting shaft 430, which is convenient for assembly. Among them, the first interlock assembly 400 can push against the transition member 530 through the first slider 420 or the connecting shaft 430, which is stable and reliable.

[0122] Exemplarily, the first slider 420 slides in the vertical direction, and the connecting shaft 430 pushes against the pressed portion 531 of the transition member 530. It can be understood that when the first crank arm 131 is in the on position or the isolation position, the pressed portion 531 is in the high position, and the transition member 530 is in the first intermediate position under the action of the locking elastic member 540; when the first crank arm 131 is in the grounding position, the pressed portion 531 is in the low position and presses against the transition member 530, so that the transition member 530 is in the second intermediate position. In some embodiments, when the first crank arm 131 is in the isolation position, the connecting shaft 430 does not contact the pressed portion 531.

[0123] Exemplarily, the connecting shaft 430 extends in the direction of its own axis above the pressed portion 531, so that the first interlock assembly 400 can push against the pressed portion 531 through the connecting shaft 430, which is convenient to achieve.

[0124] Exemplarily, the connecting shaft 430 can be set as a columnar structure with external threads, which is convenient for assembly.

[0125] Specifically, the first slider 420 is slidably connected to the first support frame 150, which is convenient for assembly. Exemplarily, first sliding holes 152 are provided on both first long sides, and the first slider 420 slidably passes through the two first sliding holes 152 to ensure the stable and reliable sliding of the first slider 420.

[0126] In this embodiment, with reference to Figures 1 to 17 As shown, the first interlock assembly 400 has a first limiting surface 421 and a first transition surface 4221 that are connected to each other; the interlock mechanism further includes a second interlock assembly 600 and a deflection interlock elastic member 320.

[0127] Specifically, the second interlock assembly 600 is connected to the second crank arm 141 of the circuit breaker 140. The second interlock assembly 600 has a second limiting surface 621 and a second transition surface 6221 that are connected to each other. The deflection interlock elastic member 320 is connected to the interlock rod 200. Among them, the interlock rod 200 rotates axially and has a first angle and a second angle.

[0128] When the interlock lever 200 is at the first angle, the deflecting interlock elastic member 320 causes the interlock lever 200 to have a tendency to rotate from the first angle to the second angle. The interlock lever 200 is clamped with the closed cabinet door 120 at the first angle, and the interlock lever 200 is disengaged from the clamped connection with the closed cabinet door 120 at the second angle.

[0129] When the first toggle arm 131 is in the isolation position or the connection position, the interlock lever 200 is kept at the first angle by abutting against the first limiting surface 421. It can be understood that when the first toggle arm 131 is in the isolation position or the connection position, the first limiting surface 421 restricts the interlock lever 200 from rotating towards the second angle, so as to keep the cabinet door 120 closed.

[0130] When the second toggle arm 141 is in the open position, the interlock lever 200 is kept at the first angle by abutting against the second limiting surface 621. It can be understood that when the second toggle arm 141 is in the open position, the second interlock assembly 600 restricts the interlock lever 200 from rotating towards the second angle, so as to keep the cabinet door 120 closed.

[0131] It can be understood that when the first toggle arm 131 is in the isolation position or the connection position, and the second toggle arm 141 is in the open position, both the first limiting surface 421 and the second limiting surface 621 abut against the interlock lever 200.

[0132] When the first toggle arm 131 is in the grounding position, and the second toggle arm 141 is in the closing position, the interlock lever 200 abuts against at least one of the first transition surface 4221 and the second transition surface 6221 to be kept at the second angle. At this time, the interlock lever 200 is disengaged from the clamped connection with the closed cabinet door 120, and the cabinet door 120 is opened, realizing the safe door-opening state where the cabinet door 120 is not closed and the circuit breaker 140 cannot be opened.

[0133] Exemplarily, when the second toggle arm 141 is in the open position, during the process of the first toggle arm 131 rotating towards the grounding position, the interlock lever 200 will disengage from the first limiting surface 421 and be opposite to the first transition surface 4221 and keep separated from the first transition surface 4221; when the first toggle arm 131 is in the grounding position, during the process of the second toggle arm 141 rotating towards the closing position, the interlock lever 200 will disengage from the second limiting surface 621. Under the yielding of the first transition surface 4221 and the action of the deflecting interlock elastic member 320, the interlock lever 200 abuts against the second transition surface 6221 and gradually rotates to the second angle. After the second toggle arm 141 is in the closing position, the interlock lever 200 abuts against at least one of the first transition surface 4221 and the second transition surface 6221. It can be understood that both the first transition surface 4221 and the second transition surface 6221 can yield to the rotation of the interlock lever 200 towards the second angle.

[0134] In this embodiment, the interlocking mechanism is driven by the linkage of the interlocking rod 200, with a large transmission span, which can achieve the locking and unlocking of the locking crank arm 142 and the opening and closing of the cabinet door 120. The structure is compact, reducing the possibility of interference between the interlocking mechanism and other components inside the cabinet body 110.

[0135] In a feasible implementation manner, as Figure 19 、 Figure 20 and Figure 24 shown, to prevent the shaft rotation of the interlocking rod 200 from causing the dial plate 220 to disengage from the linkage groove 521 or interfering with the linkage between the dial plate 220 and the linkage member 520, the dial plate 220 can be designed as a cam shape.

[0136] In some embodiments, referring to Figure 19 、 Figure 20 、 Figure 25 and Figure 26 shown, the interlocking rod 200 further includes a first limiting member 240 fixed to the interlocking main body rod 210. It can be understood that the interlocking main body rod 210 can abut against the first limiting surface 421 through the first limiting member 240 to maintain at a first angle, and the interlocking main body rod 210 can abut against the first transition surface 4221 through the first limiting member 240 to maintain at a second angle. In this embodiment, through the setting of the first limiting member 240, the interlocking rod 200 can make the angle limit of the interlocking main body rod 210 by the first interlocking component 400 stable and reliable. And through the design of the interlocking main body rod 210 and the first limiting member 240 of the interlocking rod 200, it is convenient for molding and manufacturing.

[0137] Of course, the interlocking rod 200 can also have other structural forms. For example, the interlocking main body rod 210 has a first eccentric shaft portion, and the first eccentric shaft portion can abut against the first limiting surface 421 to maintain at a first angle, and the first eccentric shaft portion can abut against the first transition surface 4221 to maintain at a second angle.

[0138] In some embodiments, the first slider 420 has a first limiting surface 421 and a first transition surface 4221, and because the first connecting rod 410 and the first slider 420 are hinged, it can ensure the stable and reliable transmission between the interlocking rod 200 and the first interlocking component 400, effectively preventing jamming. In addition, the impact generated on the interlocking mechanism when the three-position switch 130 operates is mainly concentrated on the first slider 420 and the first support frame 150, effectively preventing the deformation of the first connecting rod 410 and the interlocking rod 200, and the impact of the first limiting member 240 on the first slider 420 through the deflection of the interlocking elastic member 320 is small, effectively improving the stability of the interlocking mechanism.

[0139] In a feasible implementation, there may be a surface contact between the first limiting member 240 and the first transition surface 4221. Exemplarily, the first transition surface 4221 includes, but is not limited to, a chamfered surface or a rounded surface, effectively preventing linkage jamming.

[0140] In some embodiments, a first relief groove 422 is provided on the first limiting surface 421, and the groove wall of the first relief groove 422 includes a first transition surface 4221, facilitating the molding of the first slider 420. When the first crank arm 131 is in the grounded position and the second crank arm 141 is in the closing position, the first limiting member 240 extends into the first relief groove 422, that is, the first interlock assembly 400 allows the first limiting member 240 of the interlock rod 200 to pass through the first relief groove 422, which is stable and reliable.

[0141] Of course, the first slider 420 can also be configured as a cam structure having a first limiting surface 421 and a first transition surface 4221, or configured as other structures, which are not limited in this embodiment.

[0142] In some embodiments, the first link 410 can be a telescopic rod with adjustable length. By adjusting the length of the first link 410, the first link 410 can meet the interlock function of the first interlock assembly 400. Specifically, the first link 410 includes two first threaded rods 411 with opposite external thread rotation directions and a first sleeve rod 412 disposed between the two first threaded rods 411. The first threaded rods 411 are threadedly connected to the first sleeve rod 412. In this embodiment, to reinforce the connection between the first threaded rods 411 and the first sleeve rod 412, a first nut 413 is threadedly connected to the first threaded rods 411, and the first nut 413 abuts against the first sleeve rod 412.

[0143] In some embodiments, referring to Figure 19 、 Figure 20 、 Figure 27 and Figure 28 As shown, the interlock rod 200 further includes a second limiting member 250 fixed to the interlock main body rod 210. It can be understood that the interlock main body rod 210 can abut against the second limiting surface 621 through the second limiting member 250 to maintain at a first angle, and the interlock main body rod 210 can abut against the second transition surface 6221 through the second limiting member 250 to maintain at a second angle. In this embodiment, through the setting of the second limiting member 250 of the interlock rod 200, the second interlock assembly 600 can stably and reliably limit the angle of the interlock main body rod 210. And through the design of the first limiting member 240 and the second limiting member 250 of the interlock rod 200, it is convenient for molding and manufacturing.

[0144] Of course, the interlocking rod 200 can also be in other structural forms. For example, the interlocking main body rod 210 has a second eccentric shaft portion. The second eccentric shaft portion can abut against the second limiting surface 621 to maintain the first angle, and the second eccentric shaft portion can abut against the second transition surface 6221 to maintain the second angle.

[0145] In some embodiments, the second interlocking assembly 600 includes a second connecting rod 610 and a second slider 620. Specifically, the first end of the second connecting rod 610 is hinged to the second crank arm 141; the second slider 620 is hinged to the second end of the second connecting rod 610, and the second slider 620 is slidably connected to the cabinet body 110. The second slider 620 has a second limiting surface 621 and a second transition surface 6221, which can ensure the stable and reliable transmission between the interlocking rod 200 and the second interlocking assembly 600 and effectively prevent jamming. In addition, the impact generated by the operation of the circuit breaker 140 on the interlocking mechanism is mainly concentrated on the second slider 620 and the first support frame 150, effectively preventing the deformation of the second connecting rod 610 and the interlocking rod 200, and the impact generated by the second limiting member 250 on the second slider 620 through the deflection interlocking elastic member 320 is small, effectively improving the stability of the interlocking mechanism.

[0146] In a feasible implementation manner, the surface contact can be provided between the second limiting member 250 and the second transition surface 6221. Exemplarily, the second transition surface 6221 includes, but is not limited to, a chamfered surface or a rounded surface, effectively preventing linkage jamming.

[0147] In some embodiments, a second relief groove 622 is provided on the second limiting surface 621. The groove wall of the second relief groove 622 includes the second transition surface 6221, which is convenient for the forming of the second slider 620. When the first crank arm 131 is in the grounded position and the second crank arm 141 is in the closing position, the second limiting member 250 extends into the second relief groove 622, that is, the second interlocking assembly 600 allows the second limiting member 250 of the interlocking rod 200 through the second relief groove 622, which is stable and reliable.

[0148] Of course, the second slider 620 can also be set as a cam structure having a second limiting surface 621 and a second transition surface 6221, or set as other structures, which are not limited in this embodiment.

[0149] Specifically, the second slider 620 is slidably connected to the first support frame 150, which is convenient for assembly. Exemplarily, second sliding holes 156 are provided on both first long sides, and the second slider 620 is slidably inserted through the two second sliding holes 156 to ensure the stable and reliable sliding of the second slider 620.

[0150] Exemplarily, the second slider 620 can slide in the vertical direction.

[0151] In some embodiments, the second link 610 can be a telescopic rod with adjustable length. By adjusting the length of the second link 610, the second link 610 can meet the interlocking function of the second interlocking assembly 600. Specifically, the second link 610 includes two second threaded rods 611 with opposite external thread helix directions and a second sleeve rod 612 disposed between the two second threaded rods 611. The second threaded rods 611 are threadedly connected to the second sleeve rod 612. In this embodiment, to reinforce the connection between the second threaded rod 611 and the second sleeve rod 612, a second nut 613 is threadedly connected to the second threaded rod 611, and the second nut 613 abuts against the second sleeve rod 612.

[0152] In a feasible implementation manner, referring to Figure 1 and Figure 19 as shown, the deflection interlocking elastic member 320 includes a first interlocking elastic member 321 connected to the first limiting member 240 and a second interlocking elastic member 322 connected to the second limiting member 250, which is convenient for assembly and provides a large acting force for the rotation of the interlocking rod 200, so that the interlocking rod 200 can quickly and stably rotate from the first angle to the second angle.

[0153] Exemplarily, the first interlocking elastic member 321 can be set as a spring. Among them, the first interlocking elastic member 321 can be connected to the first limiting member 240 and the first support frame 150 by hanging.

[0154] Exemplarily, the second interlocking elastic member 322 can be set as a spring. Among them, the second interlocking elastic member 322 can be connected to the second limiting member 250 and the first support frame 150 by hanging.

[0155] In some embodiments, both the first limiting member 240 and the second limiting member 250 can form a lever structure with the interlocking main body rod 210 as the fulcrum.

[0156] Specifically, the first end of the first limiting member 240 forms a limiting fit with the first slider 420, and the second end of the first limiting member 240 is connected to the first end of the first interlocking elastic member 321. Exemplarily, the second end of the first interlocking elastic member 321 can be connected to the first support frame 150.

[0157] Specifically, the first end of the second limiting member 250 forms a limiting fit with the second slider 620, and the second end of the second limiting member 250 is connected to the first end of the second interlocking elastic member 322. Exemplarily, the second end of the second interlocking elastic member 322 can be connected to the first support frame 150.

[0158] In this embodiment, referring to Figure 19 and Figure 29As shown, a first clamping member 121 is detachably connected to the cabinet door 120, and a second clamping member 260 is provided on the interlocking rod 200. When the locking crank arm 142 is in the unlocking position, the first clamping member 121 provided on the cabinet door 120 is clamped with the second clamping member 260. When the cabinet door 120 needs to be opened in an emergency state, it is only necessary to remove the first clamping member 121 from the cabinet door 120, which is convenient for operation.

[0159] Exemplarily, the first clamping member 121 can be detachably arranged on the cabinet door 120 by means of bolt fastening.

[0160] Exemplarily, the first clamping member 121 can be a plate-like structure and can be formed by bending. Wherein, the first clamping member 121 includes a fixing plate portion 1211 and a clamping plate portion 1212 arranged at an angle. The fixing plate portion 1211 is attached to the cabinet door 120, and the clamping plate portion 1212 is clamped with the second clamping member 260.

[0161] Exemplarily, a positioning plate portion 1213 is formed by extending one side edge where the fixing plate portion 1211 is connected to the clamping plate portion 1212. The positioning portion can abut against the edge of the cabinet door 120 to prevent the first clamping member 121 from deflecting and facilitate positioning and assembly.

[0162] This embodiment also provides a switch cabinet, which includes a cabinet body 110, a cabinet door 120, a three-position switch 130, a circuit breaker 140, and the above-mentioned interlocking mechanism. The cabinet door 120 is arranged on the cabinet body 110, and both the three-position switch 130 and the circuit breaker 140 are arranged inside the cabinet body 110. In this embodiment, through the setting of the interlocking mechanism, after the cabinet door 120 is opened emergently, the circuit breaker 140 can be normally tripped, which is safe and reliable.

[0163] Exemplarily, the interlocking principle of the interlocking mechanism provided in this embodiment is:

[0164] When the switch cabinet is in operation, the first toggle arm 131 is in the on position, and the second toggle arm 141 is in the closing position. Under the action of the deflection interlock elastic member 320, the first end of the first limiting member 240 abuts against the first limiting surface 421 of the first slider 420, and the first end of the second limiting member 250 faces the second relief groove 622 of the second slider 620, so that the interlock rod 200 is at the first angle, the first engaging member 121 is engaged with the second engaging member 260, and the cabinet door 120 is closed; and the interlock rod 200 is at the first position and abuts against the cabinet door 120 under the action of the displacement interlock elastic member 310. The transition member 530 is at the first intermediate position under the action of the locking elastic member 540, the pressure receiving portion 531 is at the high position, the dial 220 extends into the linkage groove 521 to a deeper depth, the connecting shaft 430 does not contact the pressure receiving portion 531, and the locking toggle arm 142 is at the unlocking position. The stepped surface of the stepped rod 512 of the locking rod 510 does not contact the locking toggle arm 142, and the circuit breaker 140 can be tripped. At this time, the switch cabinet is as Figure 4 and Figure 5 shown in the figure.

[0165] When power outage operation is required, first, rotate the second toggle arm 141 to the tripping position. The second toggle arm 141 drives the second slider 620 to move through the second connecting rod 610. For example, it drives the second slider 620 to move upward, so that the first end of the second limiting member 250 abuts against the second limiting surface 621 of the second slider 620. At this time, the switch cabinet is as Figure 6 and Figure 7 shown in the figure. Then, rotate the first toggle arm 131 to the isolation position. The first toggle arm 131 drives the first slider 420 to move through the first connecting rod 410. For example, it drives the first slider 420 to move downward. And when the first toggle arm 131 is at the isolation position, the first end of the first limiting member 240 remains in contact with the first limiting surface 421 of the first slider 420, and the connecting shaft 430 does not contact the pressure receiving portion 531 or just contacts the pressure receiving portion 531. At this time, the switch cabinet is as Figure 8 and Figure 9 shown in the figure.

[0166] When the cabinet door 120 needs to be opened under normal circumstances, first, rotate the first toggle arm 131 from the isolation position to the grounding position. The first toggle arm 131 drives the first slider 420 to move through the first connecting rod 410. For example, it drives the first slider 420 to move downward, so that the first end of the first limiting member 240 faces the first relief groove 422 of the first slider 420. The connecting shaft 430 squeezes the pressure receiving portion 531 to the low position to push the transition member 530 to the second intermediate position. The depth of the dial 220 extending into the linkage groove 521 becomes shallower. The stepped surface of the stepped rod 512 of the locking rod 510 still does not contact the locking toggle arm 142. At this time, the switch cabinet is as Figure 10 and Figure 11The state shown. Then, rotate the second toggle arm 141 to the closing position. The second toggle arm 141 drives the second slider 620 to move through the second connecting rod 610. For example, it drives the second slider 620 to move downward. The first end of the second limiting member 250 faces the second relief groove 622 of the second slider 620. At this time, the first relief groove 422 relieves the first limiting member 240, and the second relief groove 622 relieves the second limiting member 250. The interlocking rod 200 rotates to the second angle under the action of the deflection interlocking elastic member 320, and the second engaging member 260 disengages from the first engaging member 121. The interlocking mechanism is as Figure 12 and Figure 13 shown in the state, and the cabinet door 120 can be opened.

[0167] In some embodiments, the interlocking rod 200 moves from the first position to the second position under the action of the displacement interlocking elastic member 310, and pushes open the cabinet door 120. And the interlocking rod 200 pushes against the linkage member 520 through the dial plate 220, so that the linkage member 520 pushes against the locking toggle arm 142 through the stepped surface of the stepped rod 512 of the locking rod 510. The locking toggle arm 142 rotates from the unlocking position to the locking position, and the circuit breaker 140 cannot be tripped. At this time, the switchgear is as Figure 14 and Figure 15 shown in the state.

[0168] When power transmission operation is required, first close the cabinet door 120. The cabinet door 120 pushes the interlocking rod 200 from the second position to the first position. The dial plate 220 pushes against the linkage member 520 in the reverse direction, so that the stepped surface relieves the locking toggle arm 142. The locking toggle arm 142 rotates from the locking position to the unlocking position. Secondly, rotate the second toggle arm 141 to the tripping position. The second limiting member 250 abuts against the second limiting surface 621. The interlocking rod 200 rotates from the second angle to the first angle, and the first engaging member 121 engages with the second engaging member 260. Then, rotate the first toggle arm 131 from the grounding position to the isolating position and then to the connecting position in sequence, so that the transition member 530 rotates from the second intermediate position to the first intermediate position. Finally, rotate the second toggle arm 141 to the closing position to make the switchgear operate normally.

[0169] When it is necessary to open the cabinet door 120 in an emergency state, for example, when the first toggle arm 131 is in the connecting position and the second toggle arm 141 is in the closing position, the first engaging member 121 can be removed from the cabinet door 120 to open the cabinet door 120. The interlocking rod 200 moves from the first position to the second position under the action of the displacement interlocking elastic member 310. Since the connecting shaft 430 is separated from the pressed part 531, the transition member 530 is held in the first intermediate position under the action of the locking elastic member 540. The action of the locking rod 510 cannot achieve contact with the locking toggle arm 142. The locking toggle arm 142 is in the unlocking position. At this time, the switchgear is as Figure 16 and Figure 17In the shown state, the circuit breaker 140 can be tripped. Before maintenance, the circuit breaker 140 needs to be tripped first, then the first toggle arm 131 is rotated to the grounded position, and finally the circuit breaker 140 is closed. When power restoration is required to eliminate problems, the first clamping member 121 is reinstalled on the cabinet door 120 first, then the cabinet door 120 is closed, and finally the second toggle arm 141 is rotated to the tripped position, the first toggle arm 131 is rotated to the connected position, and the second toggle arm 141 is rotated to the closed position in sequence.

[0170] Obviously, the above-mentioned embodiments of the present invention are merely examples for clearly illustrating the present invention, rather than limiting the implementation manners of the present invention. For those of ordinary skill in the art, various obvious changes, re-adjustments and substitutions can be made without departing from the protection scope of the present invention. It is not necessary and impossible to enumerate all implementation manners here. Any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the claims of the present invention.

Claims

1. An interlocking mechanism is applied to a switch cabinet. The switch cabinet includes a cabinet body (110), a cabinet door (120), a three-position switch (130) and a circuit breaker (140) arranged in the cabinet body (110). The three-position switch (130) includes a first crank arm (131), and the circuit breaker (140) includes a locking crank arm (142), characterized in that, The interlocking mechanism includes: An interlocking rod (200) which has a first position and a second position when moving axially; The interlocking rod (200) abuts against the closed cabinet door (120) at the first position; A displacement interlocking elastic member (310) connected to the interlocking rod (200). When the cabinet door (120) is closed, the displacement interlocking elastic member (310) causes the interlocking rod (200) to have a tendency to move from the first position towards the second position; A first interlocking assembly (400) connected to the first crank arm (131); A locking assembly (500) including a locking rod (510), a linkage member (520), a transition member (530), and a locking elastic member (540). The first end of the locking rod (510), the linkage member (520), and the transition member (530) are connected in sequence, and the second end of the locking rod (510) is connected to the locking crank arm (142). The linkage member (520) is connected to the interlocking rod (200), and the transition member (530) is connected to the locking elastic member (540); Wherein, when the first crank arm (131) rotates from the isolation position to the grounding position, the first crank arm (131) can push the transition member (530) from the first intermediate position to the second intermediate position through the first interlocking assembly (400); and when the first crank arm (131) is at the grounding position, the locking elastic member (540) causes the transition member (530) to have a tendency to convert from the second intermediate position towards the first intermediate position; When the first crank arm (131) is at the on position, the first interlocking assembly (400) is separated from the transition member (530), and the transition member (530) is at the first intermediate position; When the transition member (530) is at the first intermediate position, and the interlocking rod (200) is at the first position or the second position, the locking crank arm (142) is at the unlocking position, and when the locking crank arm (142) is at the unlocking position, the circuit breaker (140) can trip; When the transition member (530) is at the second intermediate position, and the interlocking rod (200) moves from the first position to the second position, the interlocking rod (200), the linkage member (520), the locking rod (510), and the locking crank arm (142) are pushed in sequence, and the locking crank arm (142) rotates from the unlocking position to the locking position. The locking crank arm (142) at the locking position can limit the tripping of the circuit breaker (140).

2. The interlocking mechanism according to claim 1, characterized in that The locking rod (510), the linkage member (520) and the transition member (530) are hinged in sequence. A linkage groove (521) is provided on the linkage member (520). The interlocking rod (200) includes an interlocking main body rod (210) and a dial plate (220) fixed on the interlocking main body rod (210). The dial plate (220) extends into the linkage groove (521). When the interlocking rod (200) moves between the first position and the second position, the dial plate (220) can push against the groove wall of the linkage groove (521) to drive the linkage member (520) to rotate.

3. The interlocking mechanism according to claim 1, characterized in that, A first support frame (150) is provided on the cabinet body (110). A first limiting hole (151) is provided on the first support frame (150). The interlocking rod (200) passes through the first limiting hole (151). Both the transition member (530) and the locking elastic member (540) are connected to the first support frame (150).

4. The interlocking mechanism according to claim 3, wherein, The transition member (530) is sequentially provided with a pressure receiving part (531), a first hinge part (532), a second hinge part (533) and a connecting part (534) along its own length direction. The first interlocking assembly (400) can push the transition member (530) from the first intermediate position to the second intermediate position by pushing against the pressure receiving part (531). The connecting part (534) is connected to the locking elastic member (540). The first hinge part (532) is hinged to the first support frame (150). The second hinge part (533) is hinged to the linkage member (520).

5. The interlocking mechanism according to claim 3, characterized in that, The first interlocking assembly (400) includes: A first connecting rod (410), the first end of the first connecting rod (410) is hinged to the first crank arm (131); A first slider (420), which is hinged to the second end of the first connecting rod (410) and is slidably connected to the first support frame (150); A connecting shaft (430), the second end of the first connecting rod (410) is hinged to the first slider (420) through the connecting shaft (430); Wherein, the first interlocking assembly (400) can push against the transition member (530) through the first slider (420) or the connecting shaft (430).

6. The interlocking mechanism according to claim 3, characterized in that, The first end of the interlocking rod (200) passes through the first limiting hole (151). A second support frame (160) is provided on the cabinet body (110). A second limiting hole (161) is provided on the second support frame (160). The second end of the interlocking rod (200) passes through the second limiting hole (161). And the displacement interlocking elastic member (310) is arranged between the interlocking rod (200) and the second support frame (160).

7. The interlocking mechanism according to any one of claims 1-6, characterized in that, The first interlocking assembly (400) has a first limiting surface (421) and a first transition surface (4221) connected to each other; The interlocking mechanism further includes: A second interlock assembly (600) is connected to a second toggle arm (141) of the circuit breaker (140). The second interlock assembly (600) has a second limiting surface (621) and a second transition surface (6221) connected to each other. A deflection interlock elastic member (320) is connected to the interlock rod (200). The interlock rod (200) rotates axially and has a first angle and a second angle. When the interlock rod (200) is at the first angle, the deflection interlock elastic member (320) causes the interlock rod (200) to have a tendency to rotate from the first angle to the second angle. The interlock rod (200) is clamped to the closed cabinet door (120) at the first angle, and the interlock rod (200) is disengaged from the clamped connection with the closed cabinet door (120) at the second angle. When the first toggle arm (131) is at the isolation position or the connection position, the interlock rod (200) is maintained at the first angle by abutting against the first limiting surface (421). When the second toggle arm (141) is at the opening position, the interlock rod (200) is maintained at the first angle by abutting against the second limiting surface (621). When the first toggle arm (131) is at the grounding position and the second toggle arm (141) is at the closing position, the interlock rod (200) abuts against at least one of the first transition surface (4221) and the second transition surface (6221) to be maintained at the second angle.

8. The interlocking mechanism according to claim 7, wherein The interlock rod (200) includes an interlock main rod (210) and a first limiting member (240) fixed to the interlock main rod (210). The interlock main rod (210) can abut against the first limiting surface (421) through the first limiting member (240) to be maintained at the first angle, and the interlock main rod (210) can abut against the first transition surface (4221) through the first limiting member (240) to be maintained at the second angle. And / or, the first interlock assembly (400) includes: A first connecting rod (410), the first end of the first connecting rod (410) is hinged to the first toggle arm (131); A first slider (420), which is hinged to the second end of the first connecting rod (410) and is slidably connected to the cabinet body (110). The first slider (420) has the first limiting surface (421) and the first transition surface (4221).

9. The interlocking mechanism according to claim 7, characterized in that, The interlock rod (200) includes an interlock main rod (210) and a second limiting member (250) fixed to the interlock main rod (210). The interlock main rod (210) can abut against the second limiting surface (621) through the second limiting member (250) to be maintained at the first angle, and the interlock main rod (210) can abut against the second transition surface (6221) through the second limiting member (250) to be maintained at the second angle. And / or, the second interlock assembly (600) includes: A second connecting rod (610), a first end of the second connecting rod (610) is hinged to the second crank arm (141); A second slider (620), which is hinged to a second end of the second connecting rod (610) and is slidably connected to the cabinet body (110), and the second slider (620) has the second limiting surface (621) and the second transition surface (6221).

10. The interlocking mechanism according to any one of claims 1-6, characterized in that, A first clamping member (121) is detachably connected to the cabinet door (120), and a second clamping member (260) is provided on the interlocking rod (200). When the locking crank arm (142) is in the unlocking position, the first clamping member (121) provided on the cabinet door (120) is clamped with the second clamping member (260).

11. A switch cabinet, characterized in that, It includes a cabinet body (110), a cabinet door (120), a three-position switch (130), a circuit breaker (140), and an interlocking mechanism according to any one of claims 1-10. The cabinet door (120) is provided on the cabinet body (110), and both the three-position switch (130) and the circuit breaker (140) are provided in the cabinet body (110).

Images