Interlocking mechanism and switch cabinet

Abstract

The invention discloses an interlocking mechanism and a switch cabinet, and belongs to the technical field of high-voltage switch equipment, the interlocking mechanism comprises an interlocking rod, a displacement interlocking elastic piece, a first interlocking assembly and a locking assembly, and the first interlocking assembly is connected with a first crank arm of a three-position switch; the locking assembly comprises a locking rod, a linkage piece, a transition piece and a locking elastic piece, the first end of the locking rod, the linkage piece and the transition piece are sequentially connected, the second end of the locking rod is connected with a locking crank arm of the circuit breaker, and the linkage piece is connected with the interlocking rod; the first crank arm rotates from the isolation position to the grounding position and can push the transition piece from the first middle position to the second middle position through the first interlocking assembly. The interlocking rod abuts against the closed cabinet door at the first position, the cabinet door is opened emergently, the interlocking rod is located at the second position, the transition piece is located at the first middle position, the locking crank arm is located at the unlocking position, and the circuit breaker can be opened; when the cabinet door is normally opened, the transition piece is located at the second middle position, the locking crank arm is located at the locking position, and the circuit breaker cannot be opened.

Description

Technical Field

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

[0002] Switchgear is an electrical device whose main function is to open and close, control and protect electrical equipment in the process of power generation, transmission, distribution and energy conversion in the power system. Among them, the circuit breaker and the three-position switch mechanism are the core components of the switchgear, and are electrical equipment used to connect and disconnect the circuit. The circuit breaker has two states: closed and open; the three-position has three positions: connected, isolated and grounded.

[0003] At present, the door of the switch cabinet is far away from the three-position switch and the circuit breaker, and a mechanical interlocking mechanism with a steel wire rope is usually used to realize transmission between the three. In the related technology, the mechanical interlocking mechanism includes a steel wire rope led from the cabinet door to the circuit breaker to lock the circuit breaker opening function, so as to achieve the purpose that the cabinet door is not closed and the circuit breaker cannot be opened. Moreover, through the mechanical interlock between the circuit breaker and the three-position switch, the grounded three-position switch cannot be operated. Therefore, if the cabinet door is not closed, the main circuit in the cabinet can be reliably grounded through the closed circuit breaker and the grounded three-position switch. However, under the normal power supply state with the three-position switch in the on state and the circuit breaker in the closed state, there may be a situation where the cabinet door needs to be opened urgently for inspection and maintenance. After the cabinet door is opened urgently, the interlocking mechanism immediately locks the circuit breaker's opening function. At this time, the circuit breaker cannot be opened urgently. If the circuit breaker needs to be opened, there are only two ways, namely closing the cabinet door or manually operating the locking crank arm of the circuit breaker to release the opening lock. Either method takes a certain amount of time and is not a normal operation, posing a major safety hazard. Summary of the invention

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

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

[0006] An interlocking mechanism is provided, which is applied to a switch cabinet, wherein the switch cabinet comprises a cabinet body, a cabinet door, and a three-position switch and a circuit breaker arranged in the cabinet body, wherein the three-position switch comprises a first crank arm, and the circuit breaker comprises a locking crank arm, and the interlocking mechanism comprises:

[0007] A locking rod, wherein the locking rod moves axially and has a first position and a second position;

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

[0009] a displacement interlocking elastic member connected to the interlocking rod, and when the cabinet door is closed, the displacement interlocking elastic member causes the interlocking rod to have a tendency to move from the first position toward the second position;

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

[0011] A locking assembly, comprising a locking rod, a linkage member, a transition member and a locking elastic member, wherein 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 arm, the linkage member is connected to the locking 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 engagement position, the first crank arm can push the transition piece from the first intermediate position to the second intermediate position through the first interlocking assembly; and when the first crank arm is located at the engagement position, the locking elastic member makes the transition piece have a tendency to transform from the second intermediate position to the first intermediate position;

[0013] When the first crank arm is located at the on position, the first interlocking assembly is separated from the transition piece, and the transition piece is located at the first intermediate position;

[0014] When the transition piece is located at the first intermediate position, and the interlocking rod is located at the first position or the second position, the locking arm is located at the unlocking position, and when the locking arm is located at the unlocking position, the circuit breaker can be opened;

[0015] When the transition piece is located at the second intermediate position and the interlocking rod moves from the first position to the second position, the interlocking rod, the linkage piece, the locking rod and the locking crank arm push against each other in sequence, and the locking crank arm rotates from the unlocking position to the locking position, and the locking crank arm can limit the circuit breaker from opening in the locking position.

[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 interlocking rod includes an interlocking main rod and a paddle fixed on the interlocking main rod, and the paddle plate extends into the linkage groove; and when the interlocking rod moves between the first position and the second position, the paddle plate can push 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, a first limiting hole is provided on the first support frame, the interlocking rod is passed through the first limiting hole, and the transition piece and the locking elastic piece are both connected to the first support frame.

[0018] Optionally, the transition piece is provided with a pressure-bearing portion, a first hinged portion, a second hinged portion and a connecting portion in sequence along its length direction; the first interlocking assembly can push the transition piece from the first middle position to the second middle position by pushing the pressure-bearing portion; the connecting portion is connected to the locking elastic member; the first hinged portion is hinged to the first support frame; and the second hinged portion is hinged to the linkage member.

[0019] Optionally, the first interlocking assembly includes:

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

[0021] A first sliding block is hinged to the second end of the first connecting rod and is slidably connected to the first supporting frame;

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

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

[0024] Optionally, the first end of the interlocking rod is passed through the first limiting hole, a second supporting frame is provided on the cabinet, a second supporting frame is provided with a second limiting hole, the second end of the interlocking rod is passed through the second limiting hole, and the displacement interlocking elastic member is provided between the interlocking rod and the second supporting frame.

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

[0026] The interlocking mechanism also includes:

[0027] A second interlocking assembly connected to the second crank arm of the circuit breaker, wherein the second interlocking assembly has a second limiting surface and a second transition surface connected to each other;

[0028] A deflection interlocking elastic member connected to the interlocking rod, the interlocking rod shaft rotates to have a first angle and a second angle, when the interlocking rod is at the first angle, the deflection interlocking elastic member makes the interlocking rod have a tendency to rotate from the first angle to the second angle, the interlocking rod is engaged with the closed cabinet door at the first angle, and the interlocking rod is disengaged from the closed cabinet door at the second angle;

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

[0030] When the second crank arm is in the open position, the interlocking rod is maintained at the first angle by abutting against the second limiting surface;

[0031] When the first crank arm is located at the contact position and the second crank arm is located at 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 comprises an interlocking main rod and a first stopper fixed to the interlocking main rod, the interlocking main rod can be abutted against the first stopper surface through the first stopper to be maintained at the first angle, and the interlocking main rod can be abutted against the first transition surface through the first stopper to be maintained at the second angle;

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

[0034] a first connecting rod, wherein a first end of the first connecting rod is hinged to the first crank arm;

[0035] The first sliding block is hinged to the second end of the first connecting rod and is slidably connected to the cabinet. The first sliding block has the first limiting surface and the first transition surface.

[0036] Optionally, the interlocking rod comprises an interlocking main rod and a second stopper fixed to the interlocking main rod, the interlocking main rod can be abutted against the second stopper surface by the second stopper to be maintained at the first angle, and the interlocking main rod can be abutted against the second transition surface by the second stopper to be maintained at the second angle;

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

[0038] a second connecting rod, wherein a first end of the second connecting rod is hingedly connected to the second crank arm;

[0039] The second sliding block is hinged to the second end of the second connecting rod and is slidably connected to the cabinet. The second sliding block 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 provided on the interlocking rod. When the locking crank arm is located at the unlocking position, the first clamping member provided on the cabinet door is clamped with the second clamping member.

[0041] Another object of the present invention is to provide a switch cabinet, comprising a cabinet body, a cabinet door, a three-position switch, a circuit breaker and the above-mentioned interlocking mechanism, wherein 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 effect: The interlocking mechanism provided by the present invention, when it is necessary to open the cabinet door for maintenance in an emergency state, in the emergency state, for example, when the first crank arm is in the connected position or the isolated position, the transition piece is located in the first intermediate position to keep the locking crank arm in the unlocked position; at this time, the circuit breaker can be opened, that is, the opening lock can be released without manual operation and without spending time, which is safe and reliable.

[0043] In an emergency state and when the cabinet door is open, before maintenance, the circuit breaker must be opened first, and then the first crank arm must be rotated to the contact position, and finally the circuit breaker must be closed. In 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, and the first crank arm is rotated to the contact position, so that the first interlocking assembly can push the transition piece to the second intermediate position, and the locking crank arm rotates to the locking position to limit the circuit breaker from opening when the interlocking rod, linkage member, locking rod and locking crank arm are pressed against each other in sequence, so that the circuit breaker can be closed without closing the cabinet door and the circuit breaker can be opened safely.

[0044] In the safe door opening state, close the cabinet door, and the cabinet door will push the interlocking rod to the first position. At this time, you can first open the circuit breaker, then rotate the first crank arm to the on position, and finally close the circuit breaker to restore power supply.

[0045] In addition, when the cabinet door needs to be opened for maintenance under normal circumstances, the circuit breaker can be opened first, and then the first crank arm can be rotated to the isolation position and the contact position in sequence, and finally the circuit breaker can be closed, and the cabinet door can be opened at this time. And the first crank arm in the contact position can keep the transition piece in the second intermediate position, open the cabinet door, move the interlocking rod from the first position to the second position, and push the interlocking rod, the linkage piece, the locking rod and the locking crank arm in sequence, so that the locking crank arm can be rotated from the unlocking position to the locking position, so as to achieve the purpose of a safe door opening state in which the cabinet door is not closed and the circuit breaker cannot be opened.

[0046] The switch cabinet provided by the present invention has an interlocking mechanism so that after the cabinet door is opened in an emergency, the circuit breaker can be normally opened, which is safe and reliable. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0048] Figure 2 It is a schematic diagram of a local structure of a switch cabinet provided by the present invention from one perspective;

[0049] Figure 3 The present invention provides Figure 2 A in the enlarged view;

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

[0051] Figure 5 The present invention provides Figure 4 The enlarged view of point B in the figure;

[0052] Figure 6 It is a partial structural schematic diagram of the switch cabinet provided by the present invention when the three-position switch is turned on and the circuit breaker is turned off;

[0053] Figure 7 The present invention provides Figure 6 The enlarged view of point C in the figure;

[0054] Figure 8 It is a partial structural schematic diagram of the switch cabinet provided by the present invention when the three-position switch is isolated and the circuit breaker is opened;

[0055] Fig. 9 The present invention provides Figure 8 The enlarged view of point D in the figure;

[0056] Fig.10 It is a partial structural schematic diagram of the switch cabinet provided by the present invention when the three-position switch is grounded and the circuit breaker is opened;

[0057] Fig.11 The present invention provides Fig.10 The enlarged view of point E in the figure;

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

[0059] Fig.13 The present invention provides Fig.12 The enlarged view of F in the figure;

[0060] Fig.14 It is a partial structural schematic diagram of the switch cabinet provided by the present invention when the locking crank arm is locked;

[0061] Fig.15 The present invention provides Fig.14 The enlarged view of G in the figure;

[0062] Fig.16 It is a partial structural schematic diagram of the switch cabinet provided by the present invention when the door is opened in an emergency;

[0063] Fig.17 The present invention provides Fig.16 The enlarged view of H in the figure;

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

[0065] Fig.19 is a schematic diagram of a local structure of a switch cabinet provided by the present invention from another viewing angle;

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

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

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

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

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

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

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

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

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

[0075] Fig.29 It is an enlarged view of the cabinet door provided by the present invention at the first clamping piece.

[0076] In the figure:

[0077] 110, cabinet body; 120, cabinet door; 121, first clamping member; 1211, fixing plate; 1212, clamping plate; 1213, positioning plate; 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 clamping member;

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

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

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

[0082] 600, second interlocking assembly; 610, second connecting rod; 611, second threaded rod; 612, second screw sleeve rod; 613, second nut; 620, second sliding block; 621, second limiting surface; 622, second clearance groove; 6221, second transition surface. DETAILED DESCRIPTION

[0083] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0084] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0085] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0086] In the description of this embodiment, the terms "upper", "lower", "right", etc., directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplification of operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

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

[0088] Specifically, the switch cabinet includes a cabinet body 110 , a cabinet door 120 , and a three-position switch 130 and a circuit breaker 140 disposed in 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 to have a connection position, an isolation position and a grounding position in sequence, the second crank arm 141 rotates to have a closing position and an opening position, and the locking crank arm 142 rotates to have a locking position and an unlocking position. It can be understood that when the first crank arm 131 is in the connection position, the three-position switch 130 is in the connection 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 opening position, the circuit breaker 140 is in the opening state. The locking crank arm 142 in the locking position can limit the circuit breaker 140 from opening, and when the locking crank arm 142 is in the unlocking position, the circuit breaker 140 can open.

[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 along the axial direction to have a first position and a second position; the interlocking rod 200 is against the closed cabinet door 120 at the first position; the displacement interlocking elastic member 310 is connected to the interlocking rod 200, and when the cabinet door 120 is closed, the displacement interlocking elastic member 310 makes the interlocking rod 200 have a tendency to move from the first position to the second position. Exemplarily, the movement of the interlocking rod 200 from the first position to the second position can be the movement of the interlocking rod 200 toward the outside of the cabinet body 110. It can be understood that the displacement interlocking elastic member 310 provides the interlocking rod 200 with a force 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 engagement position, the first crank arm 131 can push the transition piece 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 engagement position, the locking elastic member 540 makes the transition piece 530 have a tendency to transform from the second intermediate position to the first intermediate position.

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

[0096] When the transition piece 530 is located at the first intermediate position and the interlocking rod 200 is located at the first position or the second position, the locking arm 142 is located at the unlocking position.

[0097] When the transition piece 530 is located 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 piece 520, the locking rod 510 and the locking arm 142 push against each other in sequence, and the locking arm 142 rotates from the unlocking position to the locking position.

[0098] Exemplarily, when the cabinet door 120 needs to be opened for maintenance in an emergency, 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 piece 530 is located in the first middle position. Exemplarily, the emergency state can be that the three-position switch 130 is in the on state or the isolated state. When the cabinet door 120 is opened in an emergency, the transition piece 530 is located in the first middle position to keep the locking arm 142 in the unlocked position, and when the locking arm 142 is in the unlocked position, the circuit breaker 140 can be opened, that is, the opening lock can be released without manual operation and without spending time, which is safe and reliable.

[0099] In an emergency state and when the cabinet door 120 is open, before maintenance, the circuit breaker 140 must be opened first, and then the first crank arm 131 must be rotated to the contacting position, and finally the circuit breaker 140 must be closed. In the above process, because the cabinet door 120 is open, the interlocking rod 200 moves to the second position under the action of the displacement interlocking elastic member 310, and the first crank arm 131 is rotated to the contacting position, so that the first interlocking assembly 400 can push the transition piece 530 to the second intermediate position, and under the sequential abutment of the interlocking rod 200, the linkage member 520, the locking rod 510 and the locking crank arm 142, the locking crank arm 142 rotates to the locking position to limit the circuit breaker 140 from opening. After the circuit breaker 140 is closed, the cabinet door 120 is not closed, and the circuit breaker 140 cannot be opened. The purpose of the safe door opening state is achieved.

[0100] In the safe door opening state, close the cabinet door 120, and the cabinet door 120 pushes the interlocking rod 200 to the first position. At this time, the circuit breaker 140 can be opened first, and then the first crank arm 131 is rotated to the connected position, and finally the circuit breaker 140 is closed to restore power supply.

[0101] When the cabinet door 120 needs to be opened for maintenance under normal circumstances, the circuit breaker 140 can be opened first, and then the first crank arm 131 can be rotated to the isolation position and the connection position in sequence, and finally the circuit breaker 140 can be closed, and then the cabinet door 120 can be opened. And the first crank arm 131 is in the connection position so that the transition piece 530 can be kept in the second intermediate position, and the cabinet door 120 is opened, the interlocking rod 200 moves from the first position to the second position, and the interlocking rod 200, the linkage member 520, the locking rod 510 and the locking crank arm 142 push each other in sequence, so that the locking crank arm 142 can be rotated from the unlocking position to the locking position, so as to achieve the purpose of a safe door opening state in which the cabinet door 120 is not closed and the circuit breaker 140 cannot be opened.

[0102] In addition, by identifying the position of the locking crank 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 possible implementation, Figure 2 and Fig.18As shown, a through hole is provided on the locking arm 142, and the locking rod 510 includes a locking main rod 511 and a step rod 512. The first end of the locking main rod 511 is connected to the linkage 520, and the second end of the locking main rod 511 is connected to the large end of the step rod 512. The small end of the step rod 512 is passed through the through hole. It can be understood that the locking rod 510 can push the locking arm 142 from the unlocking position to the locking position through the step surface of the step rod 512. For example, when the transition piece 530 is located at 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 through hole, 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 located at the second position, so that the locking crank arm 142 is conveniently kept in the unlocked position when the cabinet door 120 is opened in an emergency, and it is stable and reliable. Of course, the locking crank arm 142 can also be other structures, for example, the peripheral side of the locking rod 510 is provided with a guide hole, and the locking crank arm 142 is provided with a guide shaft that penetrates the guide hole, and the hole wall of the guide hole pushes or gives way to the guide 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, and 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 body rod 511 and the step rod 512 can be threadedly connected, and the second end of the locking body rod 511 is threadedly connected with a fastening sleeve 513, and the fastening sleeve 513 squeezes the large end of the step rod 512 to fix the locking body rod 511 and the step rod 512 together.

[0105] In this embodiment, refer to Figure 1 , Figures 18 to 20 As shown, the locking rod 510, the linkage member 520 and the transition member 530 are hinged in sequence, and the linkage member 520 is provided with a linkage groove 521. The interlocking rod 200 includes an interlocking main rod 210 and a shift plate 220 fixed on the interlocking main rod 210. The shift 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 shift plate 220 can push the groove wall of the linkage groove 521 to drive the linkage member 520 to rotate, thereby driving the locking rod 510 to move. Among them, the linkage member 520 can be a shift fork structure.

[0106] Exemplarily, when the transition piece 530 is located at the second intermediate position, when the interlocking main rod 210 moves from the first position to the second position, the shift plate 220 squeezes the groove wall of the linkage groove 521 to drive the linkage piece 520 to rotate, thereby driving the locking rod 510 to push the locking arm 142 to rotate to the locking position.

[0107] Exemplarily, when the transition piece 530 is located in the first intermediate position, during the process of the interlocking rod 200 moving from the first position to the second position, although the shift plate 220 drives the linkage piece 520 to rotate, the linkage piece 520 does not push the locking arm 142 during the process of driving the locking rod 510 to move, that is, the locking arm 142 remains in the unlocking position.

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

[0109] In this embodiment, refer to Figure 1 , Figures 19 to 22 As shown, the cabinet 110 is provided with a first support frame 150, the first support frame 150 is provided with a first limiting hole 151, and the interlocking rod 200 is passed through the first limiting hole 151, so that the interlocking rod 200 can stably move along the axial direction. Among them, the transition piece 530 and the locking elastic piece 540 are both connected to the first support frame 150, which is convenient for assembly, compact structure, and convenient for molding and manufacturing of the cabinet 110 and the first support frame 150. It can be understood that the transition piece 530 can be limited and maintained by the first support frame 150 in the first middle position, which is stable and reliable.

[0110] Exemplarily, the first support frame 150 may be in the form of a rectangular box, including two oppositely disposed first short sides and two oppositely disposed first long sides, and the first short sides are provided with first limiting holes 151 .

[0111] Exemplarily, two annular grooves 211 are spaced apart on the interlocking main rod 210, and 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. An elastic retaining ring (not shown) can be installed on the annular groove 211, and a limiting fit is formed between the elastic retaining ring and the first short side to limit the movement of the interlocking rod 200 and facilitate assembly.

[0112] In a feasible implementation, the first end of the interlocking rod 200 is inserted into the first limiting hole 151, the cabinet 110 is provided with a second support frame 160, the second support frame 160 is provided with a second limiting hole 161, the second end of the interlocking rod 200 is inserted into the second limiting hole 161, and the displacement interlocking elastic member 310 is provided 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 large spacing, and the interlocking rod 200 is inserted into the first limiting hole 151 and the second limiting hole 161, so that the interlocking rod 200 can stably move along the axial direction, and the displacement interlocking elastic member 310 is connected to the second support frame 160 to prevent the displacement interlocking elastic member 310 from interfering with other components of the interlocking mechanism during installation.

[0113] Exemplarily, the first support frame 150 may be disposed in a front chamber of the cabinet 110 , and the second support frame 160 may be disposed in a rear chamber of the cabinet 110 .

[0114] Exemplarily, the second support frame 160 may be in the form of a rectangular box, including two oppositely disposed second short sides and two oppositely disposed second long sides, and the second short sides are provided with second limiting holes 161 .

[0115] Exemplarily, the displacement interlocking elastic member 310 can be set as a spring. In this embodiment, a limit pin 230 is radially penetrated at the second end of the interlocking rod 200, and 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 limit pin 230, and the other end abuts against one of the two second short sides close to the first support frame 150, so as to facilitate assembly.

[0116] The interlocking mechanism provided in this embodiment is particularly suitable for the modification of traditional switch cabinets. For example, when modifying a switch cabinet without a door interlocking function to add an interlocking function, it is only necessary to drill holes in 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 dismantle or modify other structures in the switch cabinet.

[0117] In this embodiment, refer to Figures 1 to 3 , Fig.23As shown, the transition piece 530 is provided with a pressure-bearing portion 531, a first hinge portion 532, a second hinge portion 533 and a connecting portion 534 in sequence along its length direction. The first interlocking assembly 400 can push the transition piece 530 from the first intermediate position to the second intermediate position by pushing the pressure-bearing 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. The second hinge portion 533 is hinged to the linkage member 520, which facilitates the assembly of the transition piece 530. It can be understood that the transition piece 530 forms a lever structure with the first hinge portion 532 as a fulcrum, so that the distance between the second hinge portion 533 at the first intermediate position and the second hinge portion 533 at the second intermediate position is large, ensuring that the locking crank arm 142 is stably maintained in the unlocked position when the transition piece 530 is located in the first intermediate position. In addition, the transition piece 530 forms a lever structure with the first hinge portion 532 as a fulcrum, so that the locking elastic member 540 and the pressure-bearing portion 531 can drive the transition piece 530 to rotate more effortlessly.

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

[0119] Specifically, Fig.24 As shown, the linkage member 520 is provided with a first linkage hinged portion 522 that can be hinged to the locking rod 510 and a second linkage hinged portion 523 that can be hinged to the transition member 530. Exemplarily, the first linkage hinged portion 522 can be a columnar structure, and the locking rod 510 has a hole-shaped structure for the first linkage hinged portion 522 to pass through, so as to facilitate the hinged connection with the locking rod 510. Exemplarily, the second linkage hinged portion 523 is a hole-shaped structure for the second hinged portion 533 to pass through.

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

[0121] In this embodiment, refer to Figures 1 to 3 , Fig.19 and Fig.21As shown, the first interlocking 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 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 interlocking assembly 400 can push the transition piece 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 piece 530. It can be understood that when the first crank arm 131 is in the connected position or the isolated position, the pressed portion 531 is in the high position, and the transition piece 530 is in the first middle position under the action of the locking elastic member 540; when the first crank arm 131 is in the connected position, the pressed portion 531 is in the low position and squeezes the transition piece 530, so that the transition piece 530 is in the second middle position. In some embodiments, when the first crank arm 131 is in the isolated position, the connecting shaft 430 does not contact the pressed portion 531.

[0123] Exemplarily, the connecting shaft 430 extends along its own axial direction to above the pressure-bearing portion 531 , so that the first interlocking assembly 400 can push the pressure-bearing portion 531 through the connecting shaft 430 , which is convenient to implement.

[0124] Exemplarily, the connecting shaft 430 may be configured as a columnar structure with external threads for easy assembly.

[0125] Specifically, the first slider 420 is slidably connected to the first support frame 150 for easy assembly. Exemplarily, the two first long sides are provided with first sliding holes 152, and the first slider 420 slides through the two first sliding holes 152 to ensure that the sliding of the first slider 420 is stable and reliable.

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

[0127] Specifically, the second interlocking assembly 600 is connected to the second crank arm 141 of the circuit breaker 140, and the second interlocking assembly 600 has a second limit surface 621 and a second transition surface 6221 connected to each other, and the deflection interlocking elastic member 320 is connected to the interlocking rod 200. The interlocking rod 200 is axially rotated to have 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 isolated position or the connected position, the interlock lever 200 is maintained 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 isolated position or the connected 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 opening position, the interlock lever 200 is maintained 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 opening 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 isolated position or the connected position, and the second toggle arm 141 is in the opening 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 maintained 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 a 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 opening 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 has a large transmission span through the linkage of the interlocking rod 200, and can realize the locking and unlocking of the locking arm 142 and the opening and closing of the cabinet door 120. The structure is compact, which reduces the possibility of interference between the interlocking mechanism and other components in the cabinet body 110.

[0135] In a possible implementation, Fig.19 , Fig. 20 and Fig.24 As shown, in order to prevent the interlocking rod 200 from rotating and causing the shifting plate 220 to disengage from the linkage groove 521 , or to interfere with the linkage between the shifting plate 220 and the linkage member 520 , the shifting plate 220 may be configured to be cam-shaped.

[0136] In some embodiments, reference Fig.19 , Fig. 20 , Fig.25 and Fig.26 As shown, the interlocking rod 200 also includes a first stopper 240 fixed on the interlocking main rod 210. It is understandable that the interlocking main rod 210 can be held at a first angle by the first stopper 240 against the first stopper surface 421, and the interlocking main rod 210 can be held at a second angle by the first stopper 240 against the first transition surface 4221. In this embodiment, the interlocking rod 200 can make the first interlocking assembly 400 stably and reliably limit the angle of the interlocking main rod 210 through the provision of the first stopper 240. And the interlocking rod 200 is convenient for molding and manufacturing through the design of the interlocking main rod 210 and the first stopper 240.

[0137] Of course, the interlocking rod 200 can also have other structural forms, for example, the interlocking main rod 210 has a first eccentric shaft portion, the first eccentric shaft portion can be against the first limiting surface 421 to maintain a first angle, and the first eccentric shaft portion can be against the first transition surface 4221 to maintain 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, the transmission between the interlocking rod 200 and the first interlocking assembly 400 can be ensured to be stable and reliable, effectively preventing jamming. In addition, when the three-position switch 130 is actuated, the impact on the interlocking mechanism is mainly concentrated on the first slider 420 and the first support frame 150, effectively preventing the first connecting rod 410 and the interlocking rod 200 from being deformed, and the first limiting member 240 has a small impact on the first slider 420 by deflecting the interlocking elastic member 320, effectively improving the stability of the interlocking mechanism.

[0139] In a feasible implementation, the first stopper 240 may be in surface contact with the first transition surface 4221. For example, the first transition surface 4221 includes but is not limited to a chamfered surface or a rounded surface, which effectively prevents linkage jamming.

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

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

[0142] In some embodiments, the first connecting rod 410 can be a telescopic rod with adjustable length, and the length of the first connecting rod 410 is adjusted so that the first connecting rod 410 satisfies the interlocking function of the first interlocking assembly 400. Specifically, the first connecting rod 410 includes two first threaded rods 411 with opposite external threads and a first screw sleeve rod 412 disposed between the two first threaded rods 411, and the first threaded rod 411 is threadedly connected to the first screw sleeve rod 412. In this embodiment, in order to strengthen the connection between the first threaded rod 411 and the first screw sleeve rod 412, a first nut 413 is threadedly connected to the first threaded rod 411, and the first nut 413 is against the first screw sleeve rod 412.

[0143] In some embodiments, reference Fig.19 , Fig. 20 , Fig. 27 and Fig.28 As shown, the interlocking rod 200 also includes a second stopper 250 fixed on the interlocking main rod 210. It is understandable that the interlocking main rod 210 can be held at the first angle by the second stopper 250 against the second stopper surface 621, and the interlocking main rod 210 can be held at the second angle by the second stopper 250 against the second transition surface 6221. In this embodiment, the interlocking rod 200 can make the second interlocking assembly 600 stably and reliably limit the angle of the interlocking main rod 210 through the provision of the second stopper 250. And the interlocking rod 200 is convenient for molding and manufacturing through the design of the first stopper 240 and the second stopper 250.

[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, which can abut against the second limiting surface 621 to maintain at the first angle, and the second eccentric shaft portion can abut against the second transition surface 6221 to maintain at 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 on the interlocking mechanism when the circuit breaker 140 operates is mainly concentrated on the second slider 620 and the first support frame 150, effectively preventing 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 deflecting interlocking elastic member 320 is small, effectively improving the stability of the interlocking mechanism.

[0146] In a feasible implementation manner, the second limiting member 250 and the second transition surface 6221 can be in surface contact. 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, and 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 to pass 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 slidably passes 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 connecting rod 610 can be a telescopic rod with adjustable length, and the length of the second connecting rod 610 is adjusted so that the second connecting rod 610 satisfies the interlocking function of the second interlocking assembly 600. Specifically, the second connecting rod 610 includes two second threaded rods 611 with opposite external threads and a second screw sleeve rod 612 disposed between the two second threaded rods 611, and the second threaded rod 611 is threadedly connected to the second screw sleeve rod 612. In this embodiment, in order to strengthen the connection between the second threaded rod 611 and the second screw sleeve rod 612, a second nut 613 is threadedly connected to the second threaded rod 611, and the second nut 613 is against the second screw sleeve rod 612.

[0152] In one possible implementation, refer to Figure 1 and Fig.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 larger force for the rotation of the interlocking rod 200, so that the interlocking rod 200 can be quickly and stably rotated from the first angle to the second angle.

[0153] Exemplarily, the first interlocking elastic member 321 may be a spring, wherein the first interlocking elastic member 321 may be connected to the first position-limiting member 240 and the first support frame 150 by hanging.

[0154] For example, the second interlocking elastic member 322 may be a spring, wherein the second interlocking elastic member 322 may be connected to the second stopper 250 and the first support frame 150 by hanging.

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

[0156] Specifically, the first end of the first stopper 240 forms a stopper match with the first slider 420, and the second end of the first stopper 240 is connected to the first end of the first interlocking elastic member 321. For example, 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 stopper 250 forms a stopper match with the second slider 620, and the second end of the second stopper 250 is connected to the first end of the second interlocking elastic member 322. For example, the second end of the second interlocking elastic member 322 can be connected to the first support frame 150.

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

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

[0160] For example, the first clamping member 121 may be a plate-shaped structure and may be formed by bending. The first clamping member 121 includes a fixed plate portion 1211 and a clamping plate portion 1212 arranged at an angle, the fixed plate portion 1211 is fitted with 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 extended from one side edge where the fixing plate portion 1211 and the clamping plate portion 1212 are connected. 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] The present embodiment further 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, wherein the cabinet door 120 is arranged on the cabinet body 110, and the three-position switch 130 and the circuit breaker 140 are both arranged in the cabinet body 110. In the present embodiment, the switch cabinet is provided with an interlocking mechanism, and after the cabinet door 120 is opened in an emergency, the circuit breaker 140 can be normally opened, 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 crank arm 131 is located at the on position, and the second crank arm 141 is located at the closing position. Under the action of the deflection interlocking elastic member 320, the first end of the first limit member 240 abuts against the first limit surface 421 of the first slider 420, and the first end of the second limit member 250 is opposite to the second yielding groove 622 of the second slider 620, so that the interlocking rod 200 is located at the first angle, the first clamping member 121 is clamped with the second clamping member 260, and the cabinet door 120 is closed; and the interlocking rod 200 The first position is located and abuts against the cabinet door 120 under the action of the displacement interlocking elastic member 310. The transition member 530 is located in the first intermediate position under the action of the locking elastic member 540. The pressure-bearing portion 531 is located at a high position. The dial plate 220 extends into a deeper depth of the linkage groove 521. The connecting shaft 430 does not contact the pressure-bearing portion 531. The locking crank arm 142 is located in the unlocking position. The stepped surface of the step rod 512 of the locking rod 510 does not contact the locking crank arm 142. The circuit breaker 140 can be opened. At this time, the switch cabinet is as follows Figure 4 and Figure 5 Status shown.

[0165] When a power outage operation is required, first, the second crank arm 141 is rotated to the off position, and the second crank arm 141 drives the second slider 620 to move through the second connecting rod 610, for example, drives the second slider 620 to move upward, so that the first end of the second limit member 250 is against the second limit surface 621 of the second slider 620. At this time, the switch cabinet is Figure 6 and Figure 7 Then, the first crank arm 131 is rotated to the isolation position, and the first crank arm 131 drives the first slider 420 to move through the first connecting rod 410, for example, drives the first slider 420 to move downward, and when the first crank arm 131 is in the isolation position, the first end of the first limit member 240 is kept against the first limit surface 421 of the first slider 420, and the connecting shaft 430 is not in contact with the pressure receiving portion 531 or is just in contact with the pressure receiving portion 531. At this time, the switch cabinet is Figure 8 and Fig. 9 Status shown.

[0166] When the cabinet door 120 needs to be opened under normal circumstances, first, the first crank arm 131 is rotated from the isolation position to the contact position, and the first crank arm 131 drives the first slider 420 to move through the first connecting rod 410, for example, drives the first slider 420 to move downward, so that the first end of the first limit member 240 is opposite to the first yielding groove 422 of the first slider 420, and the connecting shaft 430 squeezes the pressed portion 531 to the low position to push the transition member 530 to the second intermediate position, and the depth of the dial plate 220 extending into the linkage groove 521 becomes shallower, and the stepped surface of the step rod 512 of the locking rod 510 is still not in contact with the locking crank arm 142. At this time, the switch cabinet is Fig.10 and Fig.11Then, the second crank arm 141 is rotated to the closing position, and the second crank arm 141 drives the second slider 620 to move through the second connecting rod 610, for example, drives the second slider 620 to move downward, and the first end of the second stopper 250 is opposite to the second clearance groove 622 of the second slider 620. At this time, the first clearance groove 422 gives way to the first stopper 240, and the second clearance groove 622 gives way to the second stopper 250. The interlocking rod 200 is rotated to the second angle under the action of the deflection interlocking elastic member 320, and the second clamping member 260 is separated from the first clamping member 121. The interlocking mechanism is as shown in FIG. Fig.12 and Fig.13 In the state shown, 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 the cabinet door 120, and the interlocking rod 200 pushes the linkage member 520 through the dial plate 220, so that the linkage member 520 pushes the locking arm 142 through the step surface of the step rod 512 of the locking rod 510, and the locking arm 142 rotates from the unlocking position to the locking position, and the circuit breaker 140 cannot be opened. At this time, the switch cabinet is Fig.14 and Fig.15 Status shown.

[0168] When power supply operation is required, first close the cabinet door 120, and the cabinet door 120 pushes the interlocking rod 200 from the second position to the first position, and the dial plate 220 pushes the linkage member 520 in the opposite direction, so that the stepped surface gives way to the locking crank arm 142, and the locking crank arm 142 rotates from the locked position to the unlocked position. Secondly, rotate the second crank arm 141 to the open position, the second limit member 250 abuts against the second limit surface 621, the interlocking rod 200 rotates from the second angle to the first angle, and the first clamping member 121 is clamped with the second clamping member 260. Then, rotate the first crank arm 131 from the connected position to the isolation position and the connected position in sequence, so that the transition member 530 rotates from the second intermediate position to the first intermediate position. Finally, rotate the second crank arm 141 to the closed position to allow the switch cabinet to operate normally.

[0169] When the cabinet door 120 needs to be opened in an emergency, for example, when the first crank arm 131 is in the on position and the second crank arm 141 is in the closed position, the first clamping member 121 can be removed from the cabinet door 120, and the cabinet door 120 can be opened. The interlocking rod 200 moves from the first position to the second position under the action of the displacement interlocking elastic member 310. Because the connecting shaft 430 is separated from the pressure-bearing portion 531, the transition member 530 is maintained 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 crank arm 142. The locking crank arm 142 is in the unlocking position. At this time, the switch cabinet is Fig.16 and Fig.17In the state shown, the circuit breaker 140 can be opened. Before maintenance, the circuit breaker 140 must be opened first, and then the first crank arm 131 must be rotated to the connection position, and finally the circuit breaker 140 must be closed. When the problem needs to be eliminated and power supply needs to be restored, the first clamping member 121 must be reinstalled on the cabinet door 120, and then the cabinet door 120 must be closed, and finally the second crank arm 141 must be rotated to the opening position, the first crank arm 131 must be rotated to the connection position, and the second crank arm 141 must be rotated to the closing position.

[0170] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the protection scope of the present invention. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. An interlocking mechanism, applied to a switch cabinet, the switch cabinet comprising a cabinet body (110), a cabinet door (120), and a three-position switch (130) and a circuit breaker (140) arranged in the cabinet body (110), the three-position switch (130) comprising a first crank arm (131), and the circuit breaker (140) comprising a locking crank arm (142), characterized in that: The interlocking mechanism comprises: A locking rod (200), wherein the locking 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; a displacement interlocking elastic member (310) connected to the interlocking rod (200), wherein 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 toward the second position; A first interlocking assembly (400) connected to the first crank arm (131); A locking assembly (500), comprising a locking rod (510), a linkage member (520), a transition member (530) and a locking elastic member (540), wherein a first end of the locking rod (510), the linkage member (520) and the transition member (530) are connected in sequence, and a 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); When the first crank arm (131) rotates from the isolation position to the engagement position, the first crank arm (131) can push the transition piece (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 located in the engagement position, the locking elastic member (540) causes the transition piece (530) to have a tendency to transition from the second intermediate position to the first intermediate position; When the first crank arm (131) is located in the on position, the first interlocking assembly (400) is separated from the transition piece (530), and the transition piece (530) is located in the first intermediate position; When the transition piece (530) is located at the first intermediate position and the interlocking rod (200) is located at the first position or the second position, the locking arm (142) is located at the unlocking position, and when the locking arm (142) is located at the unlocking position, the circuit breaker (140) can be opened; When the transition piece (530) is located 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 piece (520), the locking rod (510) and the locking crank arm (142) push against each other in sequence, and the locking crank arm (142) rotates from the unlocking position to the locking position. The locking crank arm (142) can limit the opening of the circuit breaker (140) in the locking position.

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, the linkage member (520) is provided with a linkage groove (521), the interlocking rod (200) comprises an interlocking main rod (210) and a shifting plate (220) fixed on the interlocking main rod (210), the shifting plate (220) extending into the linkage groove (521); and when the interlocking rod (200) moves between the first position and the second position, the shifting 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) is passed through the first limiting hole (151), and the transition piece (530) and the locking elastic piece (540) are both connected to the first support frame (150).

4. The interlocking mechanism according to claim 3, characterized in that: The transition piece (530) is provided with a pressure-bearing portion (531), a first hinged portion (532), a second hinged portion (533) and a connecting portion (534) in sequence along its length direction; the first interlocking assembly (400) can push the pressure-bearing portion (531) to push the transition piece (530) from the first intermediate position to the second intermediate position; the connecting portion (534) is connected to the locking elastic member (540); the first hinged portion (532) is hinged to the first support frame (150); and the second hinged portion (533) is hinged to the linkage member (520).

5. The interlocking mechanism according to claim 3, characterized in that: The first interlocking assembly (400) comprises: A first connecting rod (410), wherein a first end of the first connecting rod (410) is hingedly connected to the first crank arm (131); A first sliding block (420) is hinged to the second end of the first connecting rod (410) and is slidably connected to the first supporting frame (150); A connecting shaft (430), wherein the second end of the first connecting rod (410) is hingedly connected to the first sliding block (420) via the connecting shaft (430); Wherein, the first interlocking assembly (400) can push the transition piece (530) via the first sliding block (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) is inserted into the first limiting hole (151), the cabinet (110) is provided with a second support frame (160), the second support frame (160) is provided with a second limiting hole (161), the second end of the interlocking rod (200) is inserted into the second limiting hole (161), and the displacement interlocking elastic member (310) is provided between the interlocking rod (200) and the second support frame (160).

7. The interlocking mechanism according to any one of claims 1 to 6, characterized in that: The first interlocking component (400) comprises a first limiting surface (421) and a first transition surface (4221) which are connected to each other; The interlocking mechanism also includes: A second interlocking assembly (600) connected to the second crank arm (141) of the circuit breaker (140), the second interlocking assembly (600) having a second limiting surface (621) and a second transition surface (6221) connected to each other; a deflection interlocking elastic member (320) connected to the interlocking rod (200); the interlocking rod (200) is axially rotated to have a first angle and a second angle; when the interlocking rod (200) is located at the first angle, the deflection interlocking elastic member (320) causes the interlocking rod (200) to have a tendency to rotate from the first angle to the second angle; the interlocking rod (200) is engaged with the closed cabinet door (120) at the first angle; and the interlocking rod (200) is disengaged from the closed cabinet door (120) at the second angle; When the first crank arm (131) is located at the isolation position or the connection position, the interlocking rod (200) is maintained at the first angle by abutting against the first limiting surface (421); When the second crank arm (141) is located at the off position, the interlocking rod (200) is held at the first angle by abutting against the second limiting surface (621); When the first crank arm (131) is located in the contacting position and the second crank arm (141) is located in the closing position, the interlocking rod (200) abuts against at least one of the first transition surface (4221) and the second transition surface (6221) to maintain the second angle.

8. The interlocking mechanism according to claim 7, characterized in that: The interlocking rod (200) comprises an interlocking main rod (210) and a first limiting member (240) fixed to the interlocking main rod (210); the interlocking main rod (210) can be held at the first angle by abutting against the first limiting surface (421) through the first limiting member (240); and the interlocking main rod (210) can be held at the second angle by abutting against the first transition surface (4221) through the first limiting member (240); And / or, the first interlocking assembly (400) comprises: A first connecting rod (410), wherein a first end of the first connecting rod (410) is hingedly connected to the first crank arm (131); The first sliding block (420) is hinged to the second end of the first connecting rod (410) and is slidably connected to the cabinet (110); the first sliding block (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 interlocking rod (200) comprises an interlocking main rod (210) and a second limiting member (250) fixed to the interlocking main rod (210); the interlocking main rod (210) can be held at the first angle by abutting against the second limiting surface (621) via the second limiting member (250); and the interlocking main rod (210) can be held at the second angle by abutting against the second transition surface (6221) via the second limiting member (250); And / or, the second interlocking assembly (600) comprises: A second connecting rod (610), wherein a first end of the second connecting rod (610) is hingedly connected to the second crank arm (141); The second sliding block (620) is hinged to the second end of the second connecting rod (610) and is slidably connected to the cabinet (110); the second sliding block (620) has the second limiting surface (621) and the second transition surface (6221).

10. The interlocking mechanism according to any one of claims 1 to 6, characterized in that: The cabinet door (120) is detachably connected to a first clamping member (121), and the interlocking rod (200) is provided with a second clamping member (260); when the locking crank arm (142) is located at 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: The invention comprises a cabinet (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 to 10, wherein the cabinet door (120) is arranged on the cabinet (110), and the three-position switch (130) and the circuit breaker (140) are both arranged in the cabinet (110).

Images