Linkage mechanism and electric device

Abstract

The utility model provides a linkage mechanism. The linkage mechanism comprises a fixed shell; a cam plate pivotally mounted to the fixed housing and configured to switch among a first cam position, a second cam position, and a third cam position; a switching-on rotation pressing plate and a switching-off rotation pressing plate which can be pivotally installed on the fixed housing; and the connection assembly is connected with the cam disc and the switching-on rotation pressing plate and is connected with the cam disc and the switching-off rotation pressing plate. The utility model further provides an electrical device which comprises the linkage mechanism, a circuit breaker and a grounding switch. When the cam disc moves from a first cam position to a second cam position along a first pivoting direction and then continuously moves to a third cam position, the closing rotating pressing plate is driven to move to a closing position through the connecting assembly; and when the cam disc moves from the third cam position to the first cam position through the second cam position in the second pivoting direction, before the cam disc moves to the first cam position, the opening rotating pressing plate is driven to move to the opening position through the connecting assembly.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the electrical field, in particular to a linkage mechanism. BACKGROUND

[0002] The existing gas insulated switchgear includes circuit breakers, disconnectors and grounding switches, wherein the disconnectors and grounding switches are arranged as a three-position mechanism. The operation steps of the gas insulated switchgear to connect the grounding circuit are: in the case of line de-energization, i.e., the circuit breaker and disconnector are both in the open position, the first step is to close the grounding switch, and the second step is to close the circuit breaker. The operation steps of the gas insulated switchgear to disconnect the grounding circuit are: in the case of line grounding, i.e., the disconnector is open, and the circuit breaker and grounding switch are both in the closed position, the first step is to open the circuit breaker, and the second step is to open the grounding switch.

[0003] In this case of step-by-step operation, in real practice, the operation steps are occasionally omitted or the sequence is reversed, which leads to incomplete grounding of the main circuit, but if the cable chamber door is opened and the charged body at the suspended potential is contacted, a major power accident or even personal injury will occur, which has great safety hazards.

[0004] Therefore, there is a need for a linkage mechanism with excellent performance to solve these problems. CONTENT OF THE INVENTION

[0005] The purpose of the present disclosure is to at least solve the problems existing in the prior art. The present disclosure provides a linkage mechanism, which comprises a fixed housing; a cam disc, which is pivotally installed to the fixed housing and is configured to move in a first pivoting direction and a second pivoting direction opposite to the first pivoting direction to switch between a first cam position, a second cam position and a third cam position; a closing rotation pressure plate, which is pivotally installed to the fixed housing; an opening rotation pressure plate, which is pivotally installed to the fixed housing; and a coupling assembly, which couples the cam disc and the closing rotation pressure plate such that the movement of the cam disc in the first pivoting direction drives the closing rotation pressure plate to move towards a closing position, and couples the cam disc and the opening rotation pressure plate such that the movement of the cam disc in the second pivoting direction drives the opening rotation pressure plate to move towards an opening position.

[0006] When the cam disc moves from the first cam position to the second cam position and continues to move to the third cam position along the first pivoting direction, the closing rotation pressure plate is driven to move to the closing position via the coupling assembly; and when the cam disc moves from the third cam position to the first cam position along the second pivoting direction, the opening rotation pressure plate is driven to move to the opening position via the coupling assembly before moving to the first cam position.

[0007] For example, according to some embodiments of the present disclosure, the cam disc is provided with a locally radially protruding tab on the outer periphery thereof. The coupling assembly comprises an actuating plate assembly configured to move in a first direction and a second direction opposite to the first direction, the first direction being parallel to a pivot plane of the cam disc, the actuating plate assembly comprising a plate plane perpendicular to the pivot plane of the cam disc and parallel to the first direction, the plate plane being provided with a spring tab, a receiving slot and an abutting portion sequentially and adjacently arranged in the first direction, one end of the spring tab being deflectable away from the plate plane. The relative positions of the cam disc and the actuating plate assembly are arranged such that only the tab of the cam disc can partially extend into the receiving slot, so that when the cam disc pivots, the tab can deflect the spring tab and abut against the abutting portion in the first direction.

[0008] For example, according to some embodiments of the present disclosure, the cam disc is provided with a locally radially protruding tab on the outer periphery thereof, the coupling assembly comprises an actuating plate assembly, the actuating plate assembly comprising a spring tab and an abutting portion sequentially arranged in a first direction, the first direction being parallel to a pivot plane of the cam disc, one end of the spring tab being fixed and the other end being deflectable towards or away from the cam disc. The relative positions of the cam disc and the actuating plate assembly are arranged such that when the cam disc pivots, the tab can deflect the spring tab and abut against the abutting portion in the first direction after avoiding the tab.

[0009] For example, according to some embodiments of the present disclosure, the actuating plate assembly comprises a first actuating plate and a second actuating plate, the spring tab is provided on the second actuating plate, and the abutting portion is provided on the first actuating plate.

[0010] For example, according to some embodiments of the present disclosure, the relative positions of the cam disc and the actuating plate assembly are arranged such that when the cam disc pivots in a first pivot direction from a first cam position, the tab abuts against a tab surface of the spring tab, deflects the spring tab to avoid the tab, and then the tab further abuts against the abutting portion to drive the first actuating plate of the actuating plate assembly to move in the first direction, so as to drive the first actuating plate to move to a first position when the cam disc pivots to a third cam position; when the cam disc pivots in a second pivot direction from the third cam position, the tab abuts against a side edge of the spring tab to drive the second actuating plate of the actuating plate assembly to move in a second direction until a second position, and at the same time, the spring tab is deflected until the spring tab avoids the tab, and then the cam disc continues to pivot to the first cam position after the tab separates from the actuating plate assembly, the second direction being opposite to the first direction.

[0011] For example, according to some embodiments of the present disclosure, the coupling assembly further comprises a closing plate, movement of the first actuating plate in the first direction drives movement of the closing plate, which in turn causes the closing rotating pressure plate to pivot to a closed position; an opening plate, movement of the second actuating plate in the second direction drives movement of the closing plate, which in turn causes the opening rotating pressure plate to pivot to an open position.

[0012] For example, according to some embodiments of the present disclosure, the coupling assembly further comprises an opening lock catch and a closing lock catch, the opening lock catch and the closing lock catch pivot about the same pivot axis.

[0013] The first arm of the closing lock catch cooperates with the closing plate, the second arm of the closing lock catch is connected to the closing rotating pressure plate, and a movement component of the closing plate in a third direction perpendicular to the first direction can drive the closing lock catch to pivot, which in turn causes the closing rotating pressure plate to move to the closed position.

[0014] The third arm of the opening lock catch cooperates with the opening plate, the fourth arm of the opening lock catch is connected to the opening rotating pressure plate, and a movement component of the opening plate in a fourth direction opposite to the third direction can drive the opening lock catch to pivot, which in turn causes the opening rotating pressure plate to move to the open position.

[0015] For example, according to some embodiments of the present disclosure, the closing plate has a first inclined slot, the fixed housing is provided with a fixed first slider inserted into the first inclined slot, when the closing plate is driven to move in the first direction, the first inclined slot slides relative to the first slider so that the closing plate simultaneously moves in the third direction, which in turn drives the closing lock catch to pivot, and in turn drives the closing rotating pressure plate to rotate to the closed position. The opening plate has a second inclined slot, the fixed housing is provided with a fixed second slider inserted into the second inclined slot, when the opening plate is driven to move in the second direction, the second inclined slot slides relative to the second slider so that the opening plate simultaneously moves in the fourth direction, which in turn drives the opening lock catch to pivot, and in turn drives the opening rotating pressure plate to rotate to the open position.

[0016] For example, according to some embodiments of the present disclosure, the closing lock catch comprises a closing catch portion, the opening lock catch comprises an opening catch portion, and the closing catch portion and the opening catch portion can abut each other or be spaced apart from each other in the pivot direction of the closing lock catch.

[0017] For example, according to some embodiments of the present disclosure, when the cam disc is in the third cam position, the closing buckle part and the opening buckle part abut against each other in the pivoting direction of the closing lock buckle, so that the opening lock buckle is prevented from moving in a direction that causes the opening rotating pressure plate to move towards the opening position. When the cam disc is away from the third cam position, the closing buckle part and the opening buckle part are spaced apart from each other in the pivoting direction of the closing lock buckle.

[0018] For example, according to some embodiments of the present disclosure, the linkage mechanism further comprises a separate opening actuating part coupled to the opening lock buckle, so that movement of the separate opening actuating part can drive the opening lock buckle to pivot, thereby causing the opening rotating pressure plate to rotate to the opening position.

[0019] For example, according to some embodiments of the present disclosure, the closing plate is provided with a closing plate return spring that biases the closing plate to its initial state; the opening plate is provided with an opening plate return spring that biases the opening plate to its initial state; the actuating plate assembly is provided with an actuating plate return spring that biases the actuating plate assembly to its initial position; the closing rotating pressure plate and the opening rotating pressure plate are provided with return torsional springs that bias the closing rotating pressure plate and the opening rotating pressure plate to respective initial positions; when the cam disc is in the first cam position, the tab is separated from the actuating plate assembly, and the closing plate, the opening plate, the actuating plate assembly, the closing rotating pressure plate and the opening rotating pressure plate are all in respective initial positions.

[0020] For example, according to some embodiments of the present disclosure, the linkage mechanism comprises a plurality of cam discs cooperating with the same actuating plate assembly.

[0021] The present disclosure also proposes an electrical device comprising the linkage mechanism according to the present disclosure, a circuit breaker, and a grounding switch. When the closing rotating pressure plate moves to the closing position, the circuit breaker is closed; when the opening rotating pressure plate moves to the opening position, the circuit breaker is opened. The grounding switch is configured to be coupled with the cam disc, and when the cam disc moves to the first cam position, the grounding switch is closed; when the cam disc moves to the second cam position, the grounding switch is opened.

[0022] For example, according to some embodiments of the present disclosure, the electrical device is a gas-insulated enclosed switchgear.

[0023] The disclosure also proposes an electrical device comprising the linkage mechanism according to the disclosure, a circuit breaker, a grounding switch and an under-voltage actuating part. When the closing rotary pressure plate moves to the closing position, the circuit breaker is closed; when the opening rotary pressure plate moves to the opening position, the circuit breaker is opened. The grounding switch is coupled with the cam plate, so that when the cam plate moves to the first cam position, the grounding switch is opened, and when the cam plate moves to the second cam position, the grounding switch is closed. When the electrical device is in an under-voltage state, the under-voltage actuating part presses the separate opening actuating part.

[0024] For example, according to some embodiments of the disclosure, when the grounding switch is opened, the under-voltage actuating part can cause the circuit breaker to be opened, and when the grounding switch is closed, the under-voltage actuating part cannot cause the circuit breaker to be opened.

[0025] The disclosure also proposes an electrical device comprising a linkage mechanism; a circuit breaker, when the closing rotary pressure plate moves to the closing position, the circuit breaker is closed, and when the opening rotary pressure plate moves to the opening position, the circuit breaker is opened; a grounding switch is provided with a plurality of grounding switches, each grounding switch is coupled with a cam plate, so that when the cam plate moves to the first cam position, the corresponding grounding switch is opened, and when the cam plate moves to the second cam position, the corresponding grounding switch is closed. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 A schematic diagram showing the movement direction of each component during the closing linkage process of the linkage mechanism according to the disclosure is shown;

[0027] Figure 2 A schematic diagram showing the movement direction of each component during the opening linkage process of the linkage mechanism according to the disclosure is shown;

[0028] Figure 3 A schematic diagram showing the closing rotary pressure plate and the opening rotary pressure plate of the linkage mechanism according to the disclosure is shown,

[0029] Figure 4a A schematic diagram showing the cooperation of the tab of the cam plate and the actuating plate assembly of the linkage mechanism according to the disclosure, wherein the tab abuts against the abutting part in the first direction,

[0030] Figure 4b A schematic diagram showing the cooperation of the tab of the cam plate and the actuating plate assembly of the linkage mechanism according to the disclosure, wherein the tab abuts against the side edge of the spring sheet in the second direction,

[0031] Figure 5a A schematic diagram showing the actuating plate assembly of the linkage mechanism according to the disclosure is shown,

[0032] Figure 5bSchematic view showing the first actuating plate of the linkage mechanism according to the present disclosure,

[0033] Figure 5c Schematic view showing the second actuating plate of the linkage mechanism according to the present disclosure,

[0034] Figure 6a Schematic view showing the closing plate of the linkage mechanism according to the present disclosure,

[0035] Figure 6b Schematic view showing the opening plate of the linkage mechanism according to the present disclosure,

[0036] Figure 7 Process showing the closing plate of the linkage mechanism according to the present disclosure making the closing rotating pressure plate move during the closing process,

[0037] Figure 8 Process showing the opening plate of the linkage mechanism according to the present disclosure making the opening rotating pressure plate move during the opening process,

[0038] Figure 9 Process showing the actuating of the separate opening actuating part of the linkage mechanism according to the present disclosure, wherein part a shows the opening catch part and the closing catch part abutting against each other, and part b shows the opening catch part and the closing catch part spaced apart from each other.

[0039] Reference signs

[0040] 1 fixed housing,

[0041] 11 first sliding block,

[0042] 12 second sliding block,

[0043] 2 cam disc,

[0044] 21 tab,

[0045] 3 actuating plate assembly,

[0046] 30 plate plane,

[0047] 31 spring sheet,

[0048] 32 accommodating groove,

[0049] 33 abutting part,

[0050] 341 first actuating plate return spring,

[0051] 342 second actuating plate return spring,

[0052] 351 first actuating tab,

[0053] 352 second actuating tab,

[0054] 361 first actuating plate,

[0055] 362 second actuating plate,

[0056] 37 engaging groove,

[0057] 41 closing plate,

[0058] 411 first inclined groove,

[0059] 42 opening plate,

[0060] 421 second inclined groove,

[0061] 43 closing lock catch,

[0062] 430 opening catch portion,

[0063] 431 first arm,

[0064] 432 second arm,

[0065] 44 opening lock catch,

[0066] 440 closing catch portion,

[0067] 443 third arm,

[0068] 444 fourth arm,

[0069] 45 closing plate return spring,

[0070] 46 opening plate return spring,

[0071] 51 closing rotary pressure plate,

[0072] 52 opening rotary pressure plate,

[0073] 53 return torsion spring,

[0074] 6 separate opening actuating portion,

[0075] 7 grounding switch,

[0076] 8 circuit breaker,

[0077] D1 first direction

[0078] D2 second direction

[0079] D3 third direction

[0080] D4 fourth direction

[0081] P1 first pivoting direction

[0082] P2 second pivoting direction DETAILED DESCRIPTION

[0083] In order to make the purpose, scheme and advantages of the technical solutions of the present disclosure clearer, the technical solutions of the embodiments of the present disclosure will be described clearly and completely below in conjunction with the drawings of the specific embodiments of the present disclosure. Unless otherwise specified and limited, the terms used herein have the meanings commonly understood in the art. The same reference signs in the drawings represent the same components.

[0084] In the description of the present disclosure, it should be noted that unless otherwise explicitly specified and limited, the terms “mounting”, “connection”, “connecting” should be understood broadly, for example, can be fixed connection, can also be detachable connection, or integrally connected; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium, can be the communication inside two elements. For those skilled in the art, the specific meanings of the above terms in the present disclosure can be understood according to the specific circumstances.

[0085] In the present disclosure, the direction in which the cam disc 2 is pivoted is designated as a first pivoting direction P1 and a second pivoting direction P2, as shown in Figure 1 and Figure 2 The first pivoting direction P1 and the second pivoting direction P2 are opposite, and the first cam position, the second cam position and the third cam position are arranged along the first pivoting direction P1. The direction of movement of the first actuating plate 361 and the second actuating plate 362 is designated as a first direction D1 and a second direction D2, and the spring sheet 31 and the abutting portion 33 are arranged along the first direction D1. The third direction D3 and the fourth direction D4 are respectively shown in Figure 6a and Figure 6b When the closing plate 41 moves along the first direction D1, it also moves along the third direction D3; when the opening plate 41 moves along the second direction D2, it also moves along the fourth direction D4.

[0086] The present disclosure proposes a linkage mechanism for linkage between different electrical components of an electrical device, in particular for linkage operation between a grounding switch and a circuit breaker of an electrical device. The electrical device may, for example, be a gas-insulated enclosed switchgear.

[0087] As shown in Figure 1 and Figure 2 The linkage mechanism according to the present switch comprises a fixed housing 1, a cam disc 2, a closing rotating pressure plate 51, an opening rotating pressure plate 52 and a coupling assembly. The fixed housing 1 is used to provide support and mounting, which can comprise a plurality of separate components, stationary components that provide support and mounting and do not participate in movement operation in the present disclosure, all of which can be referred to as the fixed housing 1.

[0088] As shown in Figure 1 and Figure 2As shown, the cam disc 2 is pivotally mounted to the fixed housing, which is configured to be movable in a first pivot direction P1 and a second pivot direction P2 opposite to the first pivot direction P1 to switch between different positions. For example, in the present disclosure, the cam disc 2 is in motion coupling with the grounding switch 7, and the cam disc 2 can be moved along with the switching of the grounding switch 7 between the closed and open states. For example, the cam disc can be switched between a first cam position, a second cam position and a third cam position. When the cam disc 2 is moved from the second cam position to the first cam position along the first pivot direction P1, the grounding switch 7 is closed; when the cam disc 2 is moved from the first cam position to the second cam position along the second pivot direction P2, the grounding switch 7 is opened; and when the cam disc 2 is continuously moved from the second cam position to the third cam position along the second pivot direction P2, the grounding switch 7 remains open.

[0089] As shown, Figure 3 the closed rotation pressure plate 51 and the open rotation pressure plate 52 are pivotally mounted to the fixed housing 1 respectively, and the actuation ends of the two are arranged close to the circuit breaker 8. When the closed rotation pressure plate 51 is pivotally moved to the closed position, the circuit breaker 8 can be closed; and when the open rotation pressure plate 51 is pivotally moved to the open position, the circuit breaker 8 can be opened.

[0090] Therefore, by making the movements of the cam disc 2, the closed rotation pressure plate 51 and the open rotation pressure plate 52 in sequence, the required sequential linkage operation can be achieved. The linkage function is achieved by the linkage assembly of the present disclosure, which is a pure mechanical structure, has high stability, reliable movement and fast action response.

[0091] As shown, Figure 1 the linkage assembly can couple the cam disc 2 and the closed rotation pressure plate 51, so that the movement of the cam disc 2 in the first pivot direction P1 can drive the closed rotation pressure plate 51 to move to the closed position, as indicated by the arrow at the closed rotation pressure plate 51 in Figure 1 , to achieve the closing operation of the circuit breaker. Further, when the cam disc 2 is moved from the first cam position to the second cam position along the first pivot direction P1 and continues to move to the third cam position, the closed rotation pressure plate 51 is driven to move to the closed position via the linkage assembly. Therefore, when the cam disc 2 moves to the second cam position, the grounding switch 7 is closed, and when the cam disc 2 continues to move to the third position, the closed rotation pressure plate 51 drives the circuit breaker 8 to be closed. This achieves the required grounding circuit connection process, in which the grounding switch 7 is closed first and the circuit breaker 8 is closed later.

[0092] And, as shown, Figure 2 the linkage assembly can couple the cam disc 2 and the open rotation pressure plate 52, so that the movement of the cam disc 2 in the second pivot direction P2 can drive the open rotation pressure plate 52 to move to the open position, as indicated by the arrow at the open rotation pressure plate 52 in Figure 2to the first cam position, the opening rotation pressure plate 52 is moved to the opening position via the coupling assembly. Thus, during this movement, the circuit breaker 8 is first opened by the opening rotation pressure plate 52, and then the cam disk 2 is moved to the first cam position, and the grounding switch 7 is opened. This achieves the required opening sequence of the grounding circuit, with the circuit breaker 8 being opened first and the grounding switch 7 being opened second.

[0093] Thus, the required opening sequence of the grounding circuit is achieved by the coupling of the operation of the grounding switch to the operation of the circuit breaker.

[0094] In particular, as shown in Figure 1 and Figure 2 the coupling assembly comprises an actuating plate assembly 3 cooperating with the cam disk 2, at least a portion of the actuating plate assembly 3 being configured to move in a first direction D1 and a second direction D2 opposite to the first direction D1. In particular, as shown in Figure 4a and Figure 4b the first direction D1 is parallel to the pivoting plane of the cam disk 2, and the actuating plate assembly 3 can comprise a plate plane 30 perpendicular to the pivoting plane of the cam disk 2 and parallel to the first direction D1. Thus, by the coupling configuration, the pivoting movement of the cam disk 2 can be coupled to a linear movement of at least a portion of the actuating plate assembly 3, for example, the pivoting movement of the cam disk 2 in the first pivoting direction P1 can be coupled to the movement of at least a portion of the actuating plate assembly 3 (for example, the first actuating plate 361) in the first direction D1, and the pivoting movement of the cam disk 2 in the second pivoting direction P2 can be coupled to the movement of at least a portion of the actuating plate assembly 3 (for example, the second actuating plate 362) in the second direction D2.

[0095] As shown in Figure 5a the plate plane 30 can be provided with a receiving groove 32, and the receiving groove 32 can be provided with spring pieces 31 and abutting portions 33 arranged in sequence along the first direction D1. One end of the spring piece 31 is connected to the plate plane 30, and the other end can be deflected towards or away from the cam disk 2, i.e. away from the plate plane 30, in particular towards the inside of the receiving groove 32. The two ends of the spring piece 31 can be opposite in a direction perpendicular to the first direction D1, or the free end of the spring piece 31 is downstream of the connected end in the first direction D1. Correspondingly, the cam disk 2 is provided with a tab 21 cooperating with the plate plane, and the tab 21 is partially radially protrudingly arranged on the outer periphery of the cam disk 2. The abutting portion 33 is arranged downstream of the spring piece 31 in the first direction D1, and the abutting portion 33 can move in the first direction D1 within the receiving groove 32.

[0096] The relative positions of the cam disc 2 and the actuating plate assembly 3 are arranged such that only the tab 21 on the cam disc 2 can partially extend into the accommodation groove 32, so that when the cam disc 2 is pivoted, the tab 21 can deflect the spring piece 31 to avoid abutting against the abutting portion 33 in the first direction D1. That is, in the case of the spring piece 31 and the abutting portion 33 being adjacent, the tab 21 can only abut against the abutting portion 33 in the first direction D1 after the spring piece 31 is deflected to the accommodation groove 32 to achieve avoidance.

[0097] In particular, the actuating plate assembly 3 comprises a first actuating plate 361 and a second actuating plate 362, the spring piece 31 can be arranged on the second actuating plate 362, and the abutting portion 33 can be arranged on the first actuating plate 361. For example, as shown in Figure 5c The accommodation groove 32 is arranged on the second actuating plate 362, and the spring piece 31 is arranged at one end of the accommodation groove 32, in particular, a matching groove 37 can also be arranged on the second actuating plate 362. As shown in Figure 5a And 5b The abutting portion 33 of the first actuating plate 361 can be inserted into the matching groove 37 to achieve the assembly and cooperation of the first actuating plate 361 and the second actuating plate 362, further, the abutting portion 33 can be located in the accommodation groove 32 by being inserted into the matching groove 37, so that the abutting portion 33 is located downstream of the spring piece 31 in the first direction D1 and can move in the first direction D1 in the accommodation groove 32. So that the tab 21 can drive the first actuating plate 361 to move in the first direction D1 by abutting against the abutting portion 33 in the first direction D1, as shown in Figure 4a And can drive the second actuating plate 362 to move in the second direction D2 by abutting against the spring piece 31 in the second direction D2, as shown in Figure 4b The deflection arrangement of the spring piece achieves the avoidance function and allows the corresponding relationship between the pivoting movement of the cam disc 2 in two directions and the linear movement of the first actuating plate 361 and the second actuating plate 362 of the actuating plate assembly 3, respectively.

[0098] In particular, the cam disc 2 and the actuating plate assembly 3 are arranged relatively such that when the cam disc 2 is pivoted from the first cam position in the first pivoting direction P1, the tab 21 abuts against the piece surface 311 of the spring piece 31 (the piece surface 311 can be parallel to the plate plane 30 when not deflected), which makes the spring piece 31 deflect to avoid the tab 21, and then the tab 21 enters the accommodation groove 32. Then the tab 21 can further abut against the abutting portion 33 with the pivoting of the cam disc 2, as shown in Figure 4a To drive the first actuating plate 361 to move in the first direction D1, and then drive the first actuating plate 361 to move in the first direction D1 to the first position when the cam disc 2 is pivoted to the third cam position. In the closed state of the grounding circuit, the cam disc 2 remains in the third cam position, and the first actuating plate 361 remains in the first position.

[0099] And, the cam disk 2 and the actuating plate assembly 3 are also arranged relatively, when the cam disk 2 is pivoted along the second pivoting direction P2 from the third cam position, the lug 21 abuts against the side edge of the spring sheet 31 in the accommodating groove 32, as shown, to drive the second actuating plate 362 to move along the second direction D2 until the second position, and at the same time, the spring sheet 31 is deflected until the spring sheet 31 avoids the lug 21, and then the lug 21 is separated from the actuating plate assembly 3, and the cam disk 2 continues to pivot until the first cam position. Figure 4b

[0100] Thus, when the cam disk 2 is at the first cam position, the lug 21 is separated from the actuating plate assembly, and it is ensured that the second actuating plate 362 is moved to the second position first, and then the cam disk 2 can return to the first cam position. And only after the cam disk 2 drives the first actuating plate 361 to move to the first position first (because in this case, the lug 21 is located in the accommodating groove 32, and the lug 21 can abut against the side edge of the spring sheet 31 in the accommodating groove 32 only when it is located in the accommodating groove 32 to drive the second actuating plate 362 to move along the second direction D2), the pivoting movement of the cam disk 2 along the second pivoting direction P2 to return to the first cam position can drive the second actuating plate 362 to move to the second position.

[0101] In addition, the actuating plate assembly 3 can also be provided with actuating plate return springs, such as the first actuating plate return spring 341 and the second actuating plate return spring 342. The actuating plate return springs bias the actuating plate assembly to its initial position, and when the cam disk 2 is at the first cam position, i.e. the state that the lug 21 is separated from the actuating plate assembly 3, the actuating plate assembly 3 is at its initial position, and in particular, the first actuating plate 361 and the second actuating plate 362 are at their respective initial positions. Specifically, the first actuating plate return spring 341 can be coupled to the first actuating plate 361, and after the first actuating plate 361 is placed at the first position, it can be returned to the initial position by the first actuating plate return spring 341. Similarly, the second actuating plate return spring 342 can be coupled to the second actuating plate 362, and after the second actuating plate 362 is placed at the second position, it can be returned to the initial position by the second actuating plate return spring 342. Thus, when the actuating plate assembly 3 is actuated by the lug 21, when the lug 21 does not exert force on the actuating plate assembly 3, the actuating plate assembly 3 is biased to the initial position to be ready for the next operation.

[0102] Further, as shown in Figure 7 and Figure 8 , it is also necessary to convert the linear motion of the first actuating plate 361 and the second actuating plate 362 into the pivoting motion of the closing rotating pressure plate 51 and the opening rotating pressure plate 52. Thus, the coupling assembly can also include the closing plate 41, the opening plate 42, the closing lock piece 43, and the opening lock piece 44.

[0103] As shown in Figure 1 and​Figure 7 As shown, the closing plate 41 is configured to be driven by the movement of the first actuating plate 361 in the first direction D1. For example, the actuating plate assembly 3 may be provided with a first actuating protrusion 351, which in particular may be provided on the first actuating plate 361. This first actuating protrusion 351 can apply only a movement component along the first direction D1 to the closing plate 41, and its movement along the second direction D2 does not have an actuating effect on the closing plate 41. For example, as Figure 6a As shown, the closing plate 41 may have a first inclined groove 411, and the fixed housing 1 is provided with a fixed first slider 11 inserted into the first inclined groove 411. When the closing plate 41 is driven to move along the first direction D1, the first inclined groove 411 slides relative to the first slider 11, so that the closing plate 41 moves along the third direction D3 at the same time. For example, the first direction D1 may be perpendicular to the third direction D3.

[0104] like Figure 7 As shown, the movement of the closing plate 41 along the third direction D3 can drive the closing latch 43 to pivot, thereby driving the closing rotating pressure plate 51 to rotate to the closing position. Specifically, the closing latch 43 is configured to pivotally move and may include a first arm 431 and a second arm 432 extending away from the pivot axis. The first arm 431 of the closing latch 43 can cooperate with the closing plate 41. For example, the movement of the closing plate 41 along the third direction D3 can actuate the first arm 431, causing the closing latch 43 to pivot. The second arm 432 of the closing latch 43 can be connected to the closing rotating pressure plate 51. For example, the two can be connected by a sliding groove. The pivoting of the closing latch 43 can further cause the closing rotating pressure plate 51 to move to the closing position.

[0105] In addition, such as Figure 7 As shown, a closing plate return spring 45 can also be provided on the closing plate 41. The closing plate return spring 45 biases the closing plate 41 in its initial position. When the cam disk 2 is in the first cam position, that is, when the actuator plate assembly 3 is in its initial position, the closing plate 41 is in its initial position. Thus, when the closing plate 41 is actuated by the actuator plate assembly 3 to drive the closing latch 43 to pivot, when the actuator plate assembly 3 does not apply force to the closing plate 41 (the actuator plate assembly 3 returns to its original position), the closing plate 41 is biased back to its initial position and ready for the next operation.

[0106] Similarly, such as Figure 2 and Figure 8As shown, the disengaging plate 42 can be configured to be driven by the movement of the second direction D2 of the second actuating plate 362, for example, a second actuating protrusion 352 can be provided on the actuating plate assembly 3, in particular, on the second actuating plate 362. The second actuating protrusion 352 can only exert a movement component of the second direction D2 on the disengaging plate 42, and the movement of the first direction D1 does not produce an actuating effect on the disengaging plate 42. Similarly, as shown, Figure 6b As shown, the disengaging plate 42 can have a second inclined slot 421, and the fixed housing 1 can be provided with a fixed second sliding block 12 inserted into the second inclined slot 421, when the disengaging plate 42 is driven to move in the second direction D2, the second inclined slot 42 slides relative to the second sliding block 12 so that the disengaging plate 42 is simultaneously moved in the fourth direction D4, for example, perpendicular to the second direction D2, and the fourth direction D4 can be opposite to the third direction D3.

[0107] As shown, Figure 8 The movement of the disengaging plate 42 in the fourth direction D4 can drive the disengaging lock member 44 to pivot, and in turn drive the disengaging rotating pressure plate 52 to rotate to the disengaging position. Specifically, the disengaging lock member 44 is configured to be pivotally movable, and can include a third arm 443 and a fourth arm 444 extending away from the pivot axis. The third arm 443 of the disengaging lock member 44 can cooperate with the disengaging plate 42, for example, the movement of the third direction D3 of the disengaging plate 42 can actuate the third arm 443, so that the disengaging lock member 44 is pivoted. The fourth arm 444 of the disengaging lock member 44 can be connected to the disengaging rotating pressure plate 52, for example, the two can be connected through a sliding slot cooperation, and the pivoting of the disengaging lock member 44 can further drive the disengaging rotating pressure plate 52 to move to the disengaging position.

[0108] Similarly, as shown, Figure 8 As shown, the disengaging plate 42 can also be provided with a disengaging plate reset spring 46, which biases the disengaging plate 42 to its initial position, when the cam disc 2 is in the first cam position, i.e. the actuating plate assembly 3 is in the state of its initial position, the disengaging plate 42 is in its initial position. Thus, when the disengaging plate 42 is actuated by the actuating plate assembly 3 to drive the disengaging lock member 44 to pivot, when the actuating plate assembly 3 does not exert force on the disengaging plate 42 (the actuating plate assembly 3 returns to its original position), the disengaging plate 42 is biased back to its initial position in preparation for the next operation.

[0109] Further, as shown, Figure 3As shown, the closing rotation pressing plate 51 and the opening rotation pressing plate 52 can be pivoted around the same pivot axis, so that the structure is more compact. A reset torsion spring 53 can also be provided on the closing rotation pressing plate 51 and the opening rotation pressing plate 52, which biases the closing rotation pressing plate 51 and the opening rotation pressing plate 52 to their respective initial positions. When the cam disc 2 is in the first cam position, the opening plate 42 is in its initial position. When the closing rotation pressing plate 51 or the opening rotation pressing plate 52 is actuated to the closing position or the opening position, the closing rotation pressing plate 51 or the opening rotation pressing plate 52 is biased to its respective initial position when the actuating force is removed or reduced, so as to be ready for the next operation.

[0110] Further, the electrical device according to the present disclosure can also have an under-voltage operation function, for example, when the electrical device is in the on state and in the under-voltage state, the circuit breaker 8 needs to be opened for protection. Therefore, an under-voltage actuating part (not shown) can be provided, which can be an electromagnetic coil for example, and when the electrical device is in the under-voltage state, the under-voltage actuating part can be actuated to open the circuit breaker 8. In particular, the under-voltage operation function can be integrated into the linkage mechanism according to the present disclosure.

[0111] Therefore, as shown in Figure 9 , the linkage mechanism can also include a separate opening actuating part 6, which can be coupled to the opening lock part 43, for example, to pivot synchronously with the opening lock part 43. When the electrical device is in the under-voltage state, the under-voltage actuating part is actuated to press the separate opening actuating part 6, so that the movement of the separate opening actuating part 6 can in turn drive the opening lock part 43 to pivot, thereby enabling the opening rotation pressing plate 52 to rotate to the opening position to achieve the opening operation of the circuit breaker 8.

[0112] However, the linkage of the grounding switch 7 and the circuit breaker 8 according to the present disclosure also performs the opening operation of the circuit breaker 8 through the opening lock part 43. In the case of the grounding loop being on, i.e., the grounding switch 7 and the circuit breaker 8 are both closed, there can be a misoperation of the under-voltage actuating part, which is undesirable and can pose a safety hazard if the circuit breaker is opened by the under-voltage actuating operation while the grounding switch 7 is closed.

[0113] Therefore, the present disclosure also solves this problem by mechanical structure. Specifically, as shown in Figure 9 , the opening lock part 44 and the closing lock part 43 can be pivoted around the same pivot axis, the closing lock part 43 can include a closing lock part 431, and the opening lock part 44 can include an opening lock part 441, the closing lock part 431 and the opening lock part 441 can abut each other (as shown in Figure 9 part a) or be spaced apart from each other (as shown in part b) in the pivoting direction of the closing lock part 43 and the opening lock part 44.Figure 9 The closing catch portion 431 and the opening catch portion 441 can be straight line sections extending in a radial direction, and can be spaced apart from each other or abut against each other with the relative movement of the closing lock catch 43 and the opening lock catch 44, for example. For example, when the cam disc 2 is located at the third cam position, i.e. the linkage causes the grounding switch to be closed and the circuit breaker linkage to be closed, the closing catch portion 431 and the opening catch portion 441 can abut against each other in the pivoting direction of the closing lock catch 43, as shown in the part a of Fig. 4, which prevents the opening lock catch 44 from being further pivoted towards the closing lock catch 43, i.e. the opening lock catch 44 is prevented from moving towards a direction to move the opening rotation pressure plate 52 towards the opening position, and the opening rotation pressure plate 52 cannot be actuated by the opening lock catch 44 to move to the opening position to cause the circuit breaker 8 to be opened. Conversely, when the cam disc 2 is away from the third cam position, the closing catch portion 431 and the opening catch portion 441 can be spaced apart from each other in the pivoting direction of the closing lock catch 43, as shown in the part b of Fig. 4, which allows the opening lock catch 44 to move to cause the opening rotation pressure plate 52 to move to the opening position to cause the circuit breaker 8 to be opened. Thus, the under-voltage actuation portion operates to cause the circuit breaker 8 to be opened in the case that the grounding switch 7 and the circuit breaker 8 are both closed.

[0114] For example, when the cam disc 2 is located at the third cam position, i.e. the linkage causes the grounding switch to be closed and the circuit breaker linkage to be closed, the closing catch portion 431 and the opening catch portion 441 can abut against each other in the pivoting direction of the closing lock catch 43, as shown in the part a of Fig. 4, which prevents the opening lock catch 44 from being further pivoted towards the closing lock catch 43, i.e. the opening lock catch 44 is prevented from moving towards a direction to move the opening rotation pressure plate 52 towards the opening position, and the opening rotation pressure plate 52 cannot be actuated by the opening lock catch 44 to move to the opening position to cause the circuit breaker 8 to be opened. Conversely, when the cam disc 2 is away from the third cam position, the closing catch portion 431 and the opening catch portion 441 can be spaced apart from each other in the pivoting direction of the closing lock catch 43, as shown in the part b of Fig. 4, which allows the opening lock catch 44 to move to cause the opening rotation pressure plate 52 to move to the opening position to cause the circuit breaker 8 to be opened. Thus, the under-voltage actuation portion operates to cause the circuit breaker 8 to be opened in the case that the grounding switch 7 and the circuit breaker 8 are both closed. Figure 9 For example, when the cam disc 2 is located at the third cam position, i.e. the linkage causes the grounding switch to be closed and the circuit breaker linkage to be closed, the closing catch portion 431 and the opening catch portion 441 can abut against each other in the pivoting direction of the closing lock catch 43, as shown in the part a of Fig. 4, which prevents the opening lock catch 44 from being further pivoted towards the closing lock catch 43, i.e. the opening lock catch 44 is prevented from moving towards a direction to move the opening rotation pressure plate 52 towards the opening position, and the opening rotation pressure plate 52 cannot be actuated by the opening lock catch 44 to move to the opening position to cause the circuit breaker 8 to be opened. Conversely, when the cam disc 2 is away from the third cam position, the closing catch portion 431 and the opening catch portion 441 can be spaced apart from each other in the pivoting direction of the closing lock catch 43, as shown in the part b of Fig. 4, which allows the opening lock catch 44 to move to cause the opening rotation pressure plate 52 to move to the opening position to cause the circuit breaker 8 to be opened. Thus, the under-voltage actuation portion operates to cause the circuit breaker 8 to be opened in the case that the grounding switch 7 and the circuit breaker 8 are both closed. Figure 9 For example, when the cam disc 2 is located at the third cam position, i.e. the linkage causes the grounding switch to be closed and the circuit breaker linkage to be closed, the closing catch portion 431 and the opening catch portion 441 can abut against each other in the pivoting direction of the closing lock catch 43, as shown in the part a of Fig. 4, which prevents the opening lock catch 44 from being further pivoted towards the closing lock catch 43, i.e. the opening lock catch 44 is prevented from moving towards a direction to move the opening rotation pressure plate 52 towards the opening position, and the opening rotation pressure plate 52 cannot be actuated by the opening lock catch 44 to move to the opening position to cause the circuit breaker 8 to be opened. Conversely, when the cam disc 2 is away from the third cam position, the closing catch portion 431 and the opening catch portion 441 can be spaced apart from each other in the pivoting direction of the closing lock catch 43, as shown in the part b of Fig. 4, which allows the opening lock catch 44 to move to cause the opening rotation pressure plate 52 to move to the opening position to cause the circuit breaker 8 to be opened. Thus, the under-voltage actuation portion operates to cause the circuit breaker 8 to be opened in the case that the grounding switch 7 and the circuit breaker 8 are both closed.

[0115] Further, the electrical device according to the present disclosure can further comprise a plurality of grounding switches 7, for example two, as shown in Figs. 5 and 6. Figure 1 and Figure 2 The linkage can correspondingly further comprise a plurality of cam discs 2, each grounding switch 7 being coupled with one cam disc 2, such that when the cam disc 2 moves to the first cam position, the corresponding grounding switch 7 is opened, and when the cam disc 2 moves to the second cam position, the corresponding grounding switch 7 is closed. The plurality of cam discs 2 are coupled with the same actuation plate assembly 3, i.e. the plate plane 30 is provided with a corresponding plurality of sets of spring tabs 31 and abutting portions 33 arranged sequentially along the first direction D1 to cooperate with the tabs 21 on one cam disc 2, respectively. The rotation of any one cam disc 2 (corresponding to the operation of opening or closing any one grounding switch) can cause the actuation plate assembly 3 to move along the first direction D1 or the second direction D2 as described above, to drive the connection assembly to cause the circuit breaker 8 to be closed or opened via the closing rotation pressure plate 51 or the opening rotation pressure plate 52.

[0116] It is to be understood that the above description is intended to be illustrative and not restrictive. For example, the above-described embodiments (and / or aspects thereof) can be used in combination with each other. In addition, many modifications can be made to adapt a particular situation or material to the teachings of the disclosure without departing from its scope. The functions or

[0117] In the appended claims, the terms "include" and "in which" are used as the plain English equivalents of the respective terms "comprising" and "wherein." Also, in the following claims, the terms "first," "second," and "third," etc. are used merely as labels, and are not intended to impose numerical requirements on their objects.

Claims

1. A linkage mechanism characterised in that, comprising a fixed housing, a cam disc pivotally mounted to the fixed housing and configured to move in a first pivot direction and a second pivot direction opposite to the first pivot direction to switch between a first cam position, a second cam position and a third cam position, a closing rotation pressure plate pivotally mounted to the fixed housing, an opening rotation pressure plate pivotally mounted to the fixed housing, a coupling assembly coupling the cam disc and the closing rotation pressure plate such that movement of the cam disc in the first pivot direction drives the closing rotation pressure plate to move towards a closing position, and coupling the cam disc and the opening rotation pressure plate such that movement of the cam disc in the second pivot direction drives the opening rotation pressure plate to move towards an opening position, when the cam disc moves from the first cam position to the second cam position and further to the third cam position in the first pivot direction, the closing rotation pressure plate is driven to move to the closing position via the coupling assembly, when the cam disc moves from the third cam position to the first cam position in the second pivot direction, the opening rotation pressure plate is driven to move to the opening position via the coupling assembly before the cam disc moves to the first cam position.

2. The linkage mechanism according to claim 1, wherein a partial radially protruding tab is provided on an outer periphery of the cam disc, the coupling assembly comprises an actuating plate assembly, the actuating plate assembly comprises spring blades and an abutting portion arranged in sequence in a first direction, the first direction is parallel to a pivot plane of the cam disc, one end of the spring blades is fixed and the other end is deflectable towards or away from the cam disc, wherein the relative position of the cam disc and the actuating plate assembly is arranged such that when the cam disc is pivoted, the tab can deflect the spring blades to avoid abutting and then abut the abutting portion in the first direction.

3. The linkage mechanism according to claim 2, wherein the actuating plate assembly comprises a first actuating plate and a second actuating plate, the spring blades are provided on the second actuating plate, and the abutting portion is provided on the first actuating plate.

4. The linkage of claim 3, wherein the relative position of the cam disc and the actuating plate assembly is arranged such that: when the cam disc is pivoted in the first pivot direction from the first cam position, the tab abuts a blade surface of the spring blades to deflect the spring blades to avoid the tab, and then the tab further abuts the abutting portion to drive the first actuating plate of the actuating plate assembly to move in the first direction to drive the first actuating plate to a first position when the cam disc is pivoted to the third cam position; and when the cam disc is pivoted in the second pivot direction from the third cam position, the tab abuts a side edge of the spring blades to drive the second actuating plate of the actuating plate assembly to move in a second direction until a second position, and at the same time, the spring blades are deflected until the spring blades avoid the tab, and then the cam disc continues to pivot to the first cam position after the tab is separated from the actuating plate assembly, the second direction is opposite to the first direction. the coupling assembly further comprises 5. The linkage mechanism of claim 4, wherein, ​ a closing plate, movement of the first actuating plate in the first direction causes movement of the closing plate, which in turn causes the closing rotary pressure plate to pivot to a closed position, an opening plate, movement of the second actuating plate in the second direction causes movement of the opening plate, which in turn causes the opening rotary pressure plate to pivot to an open position.

6. The linkage mechanism according to claim 5, wherein the coupling assembly further comprises an opening latch and a closing latch, the opening latch and the closing latch are pivoted about the same pivot axis, a first arm of the closing latch cooperates with the closing plate, a second arm of the closing latch is connected to the closing rotary pressure plate, a component of movement of the closing plate in a third direction perpendicular to the first direction is capable of causing the closing latch to pivot, which in turn causes the closing rotary pressure plate to move to the closed position, a third arm of the opening latch cooperates with the opening plate, a fourth arm of the opening latch is connected to the opening rotary pressure plate, a component of movement of the opening plate in a fourth direction opposite to the third direction is capable of causing the opening latch to pivot, which in turn causes the opening rotary pressure plate to move to the open position.

7. The linkage mechanism according to claim 6, wherein the closing plate has a first inclined slot, the fixed housing is provided with a fixed first slider inserted into the first inclined slot, when the closing plate is caused to move in the first direction, the first inclined slot slides relative to the first slider so that the closing plate is simultaneously caused to move in the third direction, which in turn causes the closing latch to pivot, which in turn causes the closing rotary pressure plate to pivot to the closed position, the opening plate has a second inclined slot, the fixed housing is provided with a fixed second slider inserted into the second inclined slot, when the opening plate is caused to move in the second direction, the second inclined slot slides relative to the second slider so that the opening plate is simultaneously caused to move in the fourth direction, which in turn causes the opening latch to pivot, which in turn causes the opening rotary pressure plate to pivot to the open position.

8. The linkage mechanism according to claim 6, wherein the closing latch comprises a closing latch portion, the opening latch comprises an opening latch portion, the closing latch portion and the opening latch portion are capable of abutting against each other or being spaced apart from each other in the pivoting direction of the closing latch.

9. The linkage mechanism according to claim 8, wherein when the cam disc is in the third cam position, the closing latch portion and the opening latch portion abut against each other in the pivoting direction of the closing latch, so that the opening latch is prevented from moving in a direction that causes the opening rotary pressure plate to move towards the open position, when the cam disc is away from the third cam position, the closing latch portion and the opening latch portion are spaced apart from each other in the pivoting direction of the closing latch.

10. The linkage mechanism according to claim 9, wherein the linkage mechanism further comprises a separate opening actuating portion, the separate opening actuating portion is coupled to the opening latch, so that movement of the separate opening actuating portion is capable of causing the opening latch to pivot, which in turn causes the opening rotary pressure plate to pivot to the open position.

11. The linkage mechanism of claim 5, wherein, the closing plate is provided with a closing plate return spring that biases the closing plate to its initial state, the opening plate is provided with an opening plate return spring that biases the opening plate to its initial state, the actuating plate assembly is provided with an actuating plate return spring that biases the actuating plate assembly to its initial position, the closing rotation pressure plate and the opening rotation pressure plate are provided with return torsion springs that bias the closing rotation pressure plate and the opening rotation pressure plate to their respective initial positions, when the cam disc is in the first cam position, the tab is separated from the actuating plate assembly, and the closing plate, the opening plate, the actuating plate assembly, the closing rotation pressure plate and the opening rotation pressure plate are all in their respective initial positions.

12. The linkage mechanism of any one of claims 2-11, wherein, the linkage mechanism comprises a plurality of cam discs that cooperate with the same actuating plate assembly.

13. An electrical device, characterized by including the linkage mechanism of any one of claims 1-12, a circuit breaker that is caused to close when the closing rotation pressure plate moves to the closing position and is caused to open when the opening rotation pressure plate moves to the opening position, a grounding switch configured to be coupled with the cam disc, the grounding switch being caused to close when the cam disc moves to the first cam position and being caused to open when the cam disc moves to the second cam position.

14. The electrical device of claim 13, wherein, the electrical device is a gas insulated switchgear.

15. An electrical device, characterized by including the linkage mechanism of claim 10, a circuit breaker that is caused to close when the closing rotation pressure plate moves to the closing position and is caused to open when the opening rotation pressure plate moves to the opening position, a grounding switch coupled with the cam disc such that the grounding switch is caused to open when the cam disc moves to the first cam position and is caused to close when the cam disc moves to the second cam position, an under-voltage actuating portion that presses the separate opening actuating portion when the electrical device is in an under-voltage state.

16. The electrical device of claim 15, wherein, the under-voltage actuating portion is able to cause the circuit breaker to open when the grounding switch is open, the under-voltage actuating portion is unable to cause the circuit breaker to open when the grounding switch is closed.

17. An electrical device, characterized by including the linkage mechanism of claim 12, a circuit breaker that is caused to close when the closing rotation pressure plate moves to the closing position and is caused to open when the opening rotation pressure plate moves to the opening position, a plurality of grounding switches, each of which is coupled with a cam disc such that the corresponding grounding switch is caused to open when the cam disc moves to the first cam position and is caused to close when the cam disc moves to the second cam position.

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