Operating mechanism for switching equipment

Abstract

The present invention relates to an operating mechanism for a switchgear, comprising: a rotatable output shaft (11) configured to perform a circuit breaking or closing operation of the switchgear by rotation; a rotatable energy storage rod (13) and a spring (4), wherein the energy storage rod (13) is configured to rotate by a motor (1) to drive the spring (4) to be compressed to store energy; and a rotatable drive rod (12) connected to the output shaft (11), rotatably connected to the energy storage rod (13) and freely rotatably connected to the spring (4) to allow ≤60° rotatability between the drive rod (12) and the spring (4) for performing a circuit breaking or closing operation of the switchgear, wherein the spring (4) is configured to release energy during at least one period of the circuit breaking and closing operation of the switchgear to rotate the drive rod (12) after passing through the dead position of the spring (4).

Description

Technical Field

[0001] The present invention relates to an operating mechanism for a switchgear, the operating mechanism comprising: a rotatable output shaft configured to perform opening or closing operations of the switchgear by rotation; a rotatable energy storage rod; and a spring, wherein the energy storage rod is configured to be rotated by a motor to drive the spring to be compressed to store energy. Background Technology

[0002] The electric spring operating mechanism is one of the key components of switchgear. It is used to store the energy provided by the power module in the spring so as to release the energy during the opening or closing of the switch, thereby driving the moving contact to quickly perform the opening or closing operation.

[0003] However, existing electric spring operating mechanisms have structural defects. Specifically, during the opening or closing process, the spring is compressed and stored by the motor before it releases energy by passing its dead point position, while the moving contact is driven by the output shaft to move slowly. This makes it impossible to achieve truly rapid opening or closing operations. Alternatively, existing electric spring operating mechanisms have complex structures, resulting in high component costs and low reliability. Summary of the Invention

[0004] Therefore, the purpose of this invention is to provide a simple, labor-saving, and reliable electric spring operating mechanism that can realize the expected movement mode of the moving contact of the switching device, such as "fast closing and fast opening", "fast closing and slow opening", "fast opening and slow closing" and other operations.

[0005] The objective of this invention is achieved through the features of the independent claims. Preferred embodiments are described in detail in the dependent claims.

[0006] Therefore, this objective is achieved by an operating mechanism for a switchgear, the operating mechanism comprising:

[0007] A rotatable output shaft, configured to perform opening or closing operations of the switching device by rotation.

[0008] A rotatable energy storage rod and spring, wherein the energy storage rod is configured to rotate via a motor to drive the spring to be compressed to store energy, and

[0009] Optionally, a rotatable drive rod is torque-resistantly connected to the output shaft, rotatably connected to the energy storage rod, and freely rotatably connected to the spring, allowing a rotational range of ≤120° between the drive rod and the spring, for realizing the opening or closing operation of the switching device, wherein...

[0010] The spring is configured to release energy during at least one of the opening and closing operations of the switching device, so as to rotate the output shaft preferably directly or via the drive rod after passing through the dead position of the spring.

[0011] The key point of the proposed solution lies in implementing free rotation in the operating mechanism, allowing the same spring and spring loading system to be used for both opening and closing operations of the switchgear. Therefore, the kinematics of the operating mechanism and the switchgear can be kept within a compact scale. Free rotation achieves decoupling and geometrically driven coupling between the linkage mechanism toward the moving contact of the switchgear and the spring that provides energy for operation. Depending on the selected geometry of the connecting / linked components, the motion characteristics of the switchgear's operating mechanism can be advantageously defined as needed.

[0012] In this way, the operating mechanism allows for rapid closing and opening operations via a spring-loaded lever (i.e., via a rotatable drive lever). Therefore, a slow movement for spring loading can be established via a shaft driver, while rapid operation preferably requires low-friction movement to accelerate the contacts of the switchgear. Typically, the proposed free-rotation principle can be integrated into the operating mechanism or into the linkage mechanism toward the moving contact of the switchgear. Furthermore, the bearings of the operating mechanism and the linkage mechanism toward the moving contact can be designed to be completely independent and partially related. By passing through the dead position of the spring, the spring energy is rapidly released, thus enabling the switchgear to open or close rapidly.

[0013] Preferably, the output shaft, energy storage rod, and drive rod share a common axis, namely the output shaft, also known as the output hub or main hub. Preferably, the rotatability between the drive rod and the spring is ≤90°, ≤60°, or ≤30° and / or ≥10°, ≥20°, or >30°. Preferably, the output shaft is rotatably and / or mechanically connected to the switching device for connecting and / or disconnecting at least one moving contact with another contact of the switching device.

[0014] According to a preferred embodiment, the drive rod is torque-resistantly connected to the energy storage rod, or the drive rod is rotatably connected to the energy storage rod, allowing a rotational range of ≤120° between the drive rod and the energy storage rod. Preferably, the rotational range between the drive rod and the energy storage rod is ≤90°, ≤60°, or ≤30° and / or ≥10°, ≥20°, or >30°. The drive rod is preferably torque-resistantly connected to the energy storage rod by an axially extending pin.

[0015] In another preferred embodiment, the energy storage rod is pivotally connected to the spring via a connecting pin, and the drive rod is configured to rotate via the connecting pin. The connecting pin is preferably attached to the spring, more preferably to one end of the spring, and / or extends in the axial direction. The term axial direction preferably refers to the output shaft. The connecting pin preferably slides freely within an opening in the drive rod.

[0016] According to another preferred embodiment, the drive rod includes an arcuate drive rod groove extending to cover ≤120°, and wherein the drive rod groove is preferably configured as an arcuate elongated hole. The drive rod groove preferably extends to cover ≤90° or ≤60° and / or ≥10°, ≥20° or >30°. In another preferred embodiment, the connecting pin slides freely within the drive rod groove.

[0017] According to another preferred embodiment, the output shaft and drive rod are configured as a single unit. This requires only one rod, and the free rotation function can be achieved using only one rod and the output shaft. In the case of two rods as described above, a distance loop is preferably provided between the two rods.

[0018] In another preferred embodiment, the energy storage rod includes at least one, preferably three, arc-shaped energy storage rod slots extending to cover ≤120°, preferably ≤90°, more preferably 60°, and / or ≥10°, ≥20°, or >30°, and wherein the energy storage rod slots are preferably configured as arc-shaped elongated holes. According to another preferred embodiment, the drive rod and / or output shaft includes a pin that slides freely within the energy storage rod slot. Preferably, the pin extends in an axial direction to guide and restrict free rotation.

[0019] In another preferred embodiment, the energy storage rod has a Y-shape, which preferably has two spaced-apart push arms arranged at a distance of ≤120°, ≤90°, or ≤60° and / or ≥10°, ≥20°, or >30° from each other. Preferably, the energy storage rod includes a hole corresponding to a connecting pin. The hole is preferably arranged opposite to the two push arms. The drive rod preferably has a V-shape with two arms, and a drive rod slot is arranged between these arms.

[0020] According to another preferred embodiment, the operating mechanism includes two drive rods and / or two energy storage rods arranged on both sides of the spring. Here, "both sides of the spring" preferably means that one end of the spring is arranged between the two drive rods and / or the two energy storage rods. Preferably, the spring includes two connecting pins arranged at one end and extending in opposite directions away from said end in the axial direction. When two drive rods and / or two energy storage rods are provided, the operating mechanism becomes very robust.

[0021] In another preferred embodiment, the actuating mechanism includes a motor, a screw, and a nut. The screw is connected to the motor and configured to rotate by the motor. The nut is fitted onto the screw and configured to move linearly along the screw as the screw rotates. The nut is provided with a protrusion configured to push the energy storage rod.

[0022] According to another preferred embodiment, the operating mechanism includes an absorber and a buffer arm, the buffer arm being fixedly connected to one end of the output shaft for contacting the absorber during the final phase of the opening or closing operation of the switchgear.

[0023] This objective is also achieved by a switching device comprising a moving contact and an operating mechanism for the switching device as described above, the operating mechanism being configured to drive the moving contact to perform an opening or closing operation. The switching device may include two contacts, one movable relative to the other and arranged below the movable contact. The movable contact can move between a closed position where the contacts are electrically connected and an open position where the contacts are not connected. The movable contact may be provided as a tulip-shaped contact, and the other contact (e.g., a fixed contact) may be provided as a socket contact, or vice versa. Furthermore, the two contacts may be arranged to be movable relative to each other.

[0024] According to another preferred embodiment, the switchgear is provided as a grounding switch, disconnecting switch, disconnecting grounding switch, and fast grounding switch of a gas-insulated switchgear. The grounding switch and fast grounding switch for interrupting non-short-circuit currents are preferably provided as devices designed to interrupt only non-short-circuit currents, particularly as disconnecting switches, more particularly as high-voltage disconnecting switches, or grounding switches, more particularly as make-proof grounding switches, or as medium-voltage or high-voltage gas-insulated switchgear (GIS) including such devices. In contrast to non-short-circuit current, the term "short-circuit current" can be understood as the current that establishes up to approximately 3 seconds after the point of connection to ground at high voltage when originating from a power grid operating at high voltage. According to this definition, the term "non-short-circuit current" preferably refers to any current that does not fall under the definition of "short-circuit current" given above.

[0025] Generally, disconnecting switches or grounding switches (also known as grounding switches) are understood as protective devices included in switchgear components such as circuit breakers and isolators. When a circuit breaker is removed, the grounding switch automatically grounds a portion of the busbar adjacent to the circuit breaker. For isolators, when the isolator isolates the circuit, the grounding switch contacts the busbar to release any load that may have accumulated there.

[0026] For example, grounding switches in switchgear are used to ground the remaining changes in the power line after it has been removed from its source. After a circuit is disconnected or tripped by circuit breakers and isolators, the remaining load typically remains in the circuit. Grounding switches are usually provided to release the load. Such disconnecting switches or grounding switches are typically designed to withstand short circuits. Disconnecting switches or grounding switches in substations typically have the capability to generate short circuits to protect other electrical equipment from damage. Disconnecting switches or grounding switches are often used in conjunction with several high-voltage switchgear units and also serve as protective devices during the maintenance of high-voltage electrical equipment.

[0027] According to another embodiment, an operating mechanism for a switchgear is provided, comprising a base and a power module, an energy storage module, and a drive module mounted to the base. The energy storage module includes an energy storage rod and a spring, wherein the energy storage rod is pivotally connected to the spring via a connecting pin and is adapted to be driven to rotate by the power module so as to drive the spring to rotate and be compressed to store energy. The drive module includes a drive rod and an output shaft, wherein the drive rod is sleeved on the output shaft and is non-rotatable relative to the output shaft, and is adapted to be driven to rotate by the connecting pin so as to drive the output shaft to perform a opening or closing operation of the switchgear. The operating mechanism is configured such that, during at least one period of opening or closing operation of the switchgear, only after the spring has rotated until it has passed its dead position, the spring releases energy and drives the drive rod to rotate via the connecting pin.

[0028] In another preferred embodiment, the operating mechanism is configured such that, during each of the opening and closing operations of the switchgear, only after the spring has rotated until it has passed its dead position, the spring releases energy and drives the drive rod to rotate via the connecting pin.

[0029] According to one alternative embodiment, the energy storage rod is configured to have a Y-shape, and / or the drive rod is configured to have a V-shape.

[0030] In another preferred embodiment, the drive rod is splined onto the output shaft.

[0031] According to one alternative embodiment, the energy storage rod is sleeved on the output shaft and is rotatable relative to the output shaft via a bearing.

[0032] In another preferred embodiment, the energy storage module includes two energy storage rods arranged on both sides of the drive rod.

[0033] According to one alternative embodiment, the drive module includes a motor, a screw, and a nut. The screw is connected to the motor to be driven to rotate by the motor, and the nut is fitted onto the screw and adapted to move linearly along the screw as the screw rotates. The nut is provided with a protrusion adapted to push the energy storage rod.

[0034] In another preferred embodiment, the operating mechanism further includes a damping module comprising: an absorber mounted to a base; and a buffer arm fixedly connected to one end of the output shaft to contact the absorber during the final phase of the opening or closing operation of the switching device.

[0035] Compared to existing technologies, the operating mechanism for switchgear proposed in this disclosure has several advantages, particularly: by setting independent energy storage rods and drive rods, the energy storage operation and at least one of the opening or closing operations will not affect each other; the moving contact of the switchgear does not have a slow operating phase that would require it to be driven by the power module before the spring passes its dead point position, thus giving the operating mechanism better acceleration characteristics; furthermore, the parts of the operating mechanism are simple and reliable in shape and overall structure, and the cost is low, which is conducive to modular design and can be widely used in various types of switchgear. Attached Figure Description

[0036] These and other aspects of the invention will become apparent from the embodiments described below.

[0037] In the attached diagram:

[0038] Figure 1 This is a partial structural schematic diagram of an operating mechanism according to a preferred embodiment;

[0039] Figure 2 yes Figure 1 A schematic diagram of a partial structure of the operating mechanism as viewed from another perspective;

[0040] Figure 3 yes Figure 1 A schematic diagram of a partial structure of the operating mechanism from another perspective;

[0041] Figures 4A to 4E are schematic diagrams of the operation process of the operating mechanism according to a preferred embodiment;

[0042] Figure 5 This is a partial structural schematic diagram of the operating mechanism according to another preferred embodiment;

[0043] Figure 6 yes Figure 5 A schematic diagram of the components of the operating mechanism viewed from another perspective;

[0044] Figure 7 This is a partial structural schematic diagram of the operating mechanism according to yet another preferred embodiment;

[0045] Figure 8 yes Figure 6 A schematic diagram of the components of the operating mechanism viewed from another perspective; and

[0046] Figure 9 This is a partial structural schematic diagram of the operating mechanism according to yet another preferred embodiment. Detailed Implementation

[0047] The implementation and use of the proposed solution are discussed in detail below. However, it should be understood that the specific embodiments discussed are merely illustrative of particular ways of implementing and using the proposed solution, and are not intended to limit the scope of protection of the proposed solution.

[0048] When describing the structure and position of components, directional expressions such as "top," "bottom," "upper," "lower," "clockwise," and "counterclockwise" are not absolute but relative. These directional expressions are appropriate when the components are arranged as shown in the figure, but they should be changed accordingly when the positions of these components in the figure change.

[0049] Furthermore, unless otherwise explicitly stated and limited, terms such as "installation" and "connection" should be interpreted broadly. For example, "connection" can mean "fixed connection," "detachable connection," or "integrated"; it can mean "mechanical connection" or "electrical connection"; it can mean "direct connection," "indirect connection," or "associated with something through some function." Those skilled in the art can understand the specific meaning of these terms according to the specific circumstances.

[0050] It is understood that the switchgear 601 to which the electric spring operating mechanism is applicable includes, but is not limited to, grounding switches, disconnecting switches, disconnecting grounding switches and fast grounding switches of gas-insulated switchgear (GIS).

[0051] The following reference Figures 1 to 3 Describe the specific structure of the operating mechanism according to a preferred embodiment. For example... Figures 1 to 3 As shown, the operating mechanism mainly includes a base 8, a power module, an energy storage module, and a drive module, with each module installed on the base 8.

[0052] The power module mainly includes a motor 1 and a screw-nut transmission device connected to the motor 1. More specifically, the motor 1, which provides power, is fixedly mounted to the base 8 and is configured to transmit power to the screw-nut transmission device through a first transmission gear 101 fixedly sleeved on the output shaft of the motor 1 and a second transmission gear 6 meshing with the first transmission gear 101.

[0053] The screw-nut drive includes components such as a screw 701, a nut 702, a protrusion 703, a limit rod 704, and a micro switch 705. The two ends of the screw 701 are rotatably mounted to the base 8, for example, via bearings. A second transmission gear 6 is sleeved on the screw 701 and is non-rotatable relative to the screw 701, to drive the screw 701 to rotate under the drive of the motor 1. It is understood that the type of screw 701 includes, but is not limited to, a ball screw or a trapezoidal screw. The nut 702 is sleeved on the screw 701 and is capable of linear movement along the screw 701 when the screw 701 rotates.

[0054] Furthermore, each of the top and bottom surfaces of the nut 702 is provided with a protrusion 703, such as a pin integrally formed on the nut 702, for pushing the energy storage rod 13, as described below. A limit rod 704 is mounted to the base 8 and parallel to the screw 701 to limit the position of the nut 702 as it moves along the screw 701, thereby preventing rotation of the nut 702. A micro switch 705 is mounted to the limit rod 704 and adjacent to both ends of the screw 701 to send a control signal, such as a stop signal, to the motor 1 when the nut 702 moves to contact the micro switch 705.

[0055] The energy storage module includes two energy storage rods 13 and an energy storage spring 4 mounted to a spring seat. More specifically, each energy storage rod 13 is sleeved on the output shaft 11 via, for example, a first bearing / sleeve 5 and is rotatable relative to the output shaft 11 (see description below), and is configured to have a generally Y-shape. That is, the energy storage rod 13 includes a first push arm 131 and a second push arm 132, which are arranged symmetrically with respect to each other in a generally V-shape and are rotatable by a protrusion 703 of a nut 702, and the ends of the energy storage rod 13 opposite to the two push arms are provided with openings through which a connecting pin 2 passes.

[0056] The spring seat includes a first spring seat 301 mounted to the base 8 and a second spring seat 302 moving in the opposite direction to the first spring seat 301 and movable toward or away from the first spring seat 301. The spring 4 is helically arranged on a guide rod 304 between the first spring seat 301 and the second spring seat 302 to be compressed between the two spring seats 301 and 302 to store energy. The second spring seat 302 is integrally provided with two connecting plates 303 protruding in a direction away from the first spring seat 301. Each connecting plate 303 is provided with an opening through which a connecting pin 2 passes, allowing the two energy storage rods 13 to be pivotally connected to the spring 4 via the connecting pin 2.

[0057] In the illustrated embodiment, two connecting plates 303 are arranged between two energy storage rods 13, and a bushing 14 arranged between the two connecting plates 303 is fitted onto the connecting pin 2. That is, the connecting pin 2 passes through the lower energy storage rod 13, the lower connecting plate 303, the bushing 14, the upper connecting plate 303, and the upper energy storage rod 13 sequentially from bottom to top. Therefore, when the energy storage rod 13 is pushed to rotate by the nut 702 under the drive of the power module, it can drive the spring seat and the spring 4 to rotate through the connecting pin 2, so that the spring 4 is compressed to store energy.

[0058] The drive module includes a drive rod 12 and an output shaft 11. More specifically, both ends of the output shaft 11 are rotatably mounted to the base 8 via, for example, second bearings 15, and the output shaft 11 is connected to the moving contact 602 of the switchgear 601, such that rotation of the output shaft 11 drives movement of the moving contact 602 to realize the opening and closing operations of the switchgear 601. The drive rod 12 is sleeved on the output shaft 11 via, for example, splines 111 (e.g., external splines formed on the output shaft 11 and internal splines formed on the drive rod 12) and is non-rotatable relative to the output shaft 11 to drive the output shaft 11 to rotate, and is configured to have a generally V-shape.

[0059] That is, the drive rod 12 includes a third push arm 121 and a fourth push arm 122, which are arranged in a generally V-shape symmetrically with respect to each other, and can be rotated by the connecting pin 2, particularly by the bushing 14 arranged on the connecting pin 2. In the illustrated embodiment, two energy storage rods 13 sleeved on the output shaft 11 are respectively arranged on both sides of the drive rod 12. That is, the output shaft 11 passes through the lower energy storage rod 13, the drive rod 12, and the upper energy storage rod 13 sequentially from bottom to top.

[0060] The damping module includes two absorbers 9 mounted to the base 8 and a buffer arm 10 fixedly connected to one end of the output shaft 11. During the final phase of the opening or closing operation of the switchgear 601, the buffer arm 10 contacts the corresponding absorber 9 to reduce the moving speed of the moving contact 602 during this final phase and to limit its position.

[0061] By matching parameters such as the angle between the two push arms of the energy storage rod 13, the angle between the two push arms of the drive rod 12, and the positions of the screw-nut transmission and the output shaft 11, during at least one period of the opening and closing operation of the switchgear 601, the spring 4 is allowed to release energy and drive the drive rod 12 to rotate via the connecting pin 2 only after the spring 4 has rotated until it has passed its dead point position, so as to realize operations such as "fast closing and fast opening", "fast closing and slow opening", and "fast opening and slow closing" of the switchgear 601.

[0062] The operation of this operating mechanism can realize the "fast closing and slow opening" operation of the switchgear 601, which will be described below with reference to Figures 4A to 4E.

[0063] The initial position of the operating mechanism is the "open" position, as shown in Figure 4A, where the nut 702 is located at one end of the screw 701. After the "close" operation begins, the motor 1 drives the screw 701 to rotate via the second transmission gear 6, causing the nut 702 to begin moving linearly along the screw 701 until the protrusion 703 of the nut 702 contacts the first push arm 131 of the energy storage rod 13, as shown in Figure 4B.

[0064] Then, the nut 702 continues to move linearly along the screw 701 and pushes the first push arm 131 through the protrusion 703 to drive the energy storage rod 13 to begin rotating counterclockwise. Since the energy storage rod 13 is pivotally connected to the spring 4 via the connecting pin 2, the rotation of the energy storage rod 13 can drive the spring 4 to rotate clockwise and be compressed to store energy until the spring 4 reaches its dead position to complete energy storage, see Figure 4C.

[0065] The "dead point" here refers to the position where the central axis of the spring 4 coincides with the central axis of the energy storage rod 13 (i.e., the center line of the angle between the first push arm 131 and the second push arm 132, which is also the axis of symmetry of the energy storage rod 13) (see the dashed line in Figure 4C). At this time, if the spring 4 is not subjected to a force perpendicular to its central axis, for example, if the protrusion 703 of the nut 702 no longer pushes the energy storage rod 13, then the spring 4 can remain stationary.

[0066] As shown in Figures 4A to 4C, during the energy storage process of spring 4, the connecting pin 2 moves from a position where it contacts the third push arm 121 of the drive rod 12 to a position where it contacts the fourth push arm 122 of the drive rod 12. However, the drive rod 12 remains stationary during the energy storage process of spring 4, so that the output shaft 11 and the moving contact 602 of the switching device 601 remain stationary during the energy storage process of spring 4.

[0067] Then, nut 702 continues to move linearly along screw 701, causing spring 4 to rapidly release energy after passing its dead center position. This causes connecting pin 2 to push drive rod 12 to rotate rapidly counterclockwise through bushing 14 until it reaches the "closed" position, see Figure 4D. The rotation of drive rod 12 can drive output shaft 11 to rotate rapidly, thereby driving the moving contact 602 of switchgear 601 to complete a rapid "closing" operation.

[0068] During the final phase of this operation, the buffer arm 10 connected to the output shaft 11 contacts the corresponding absorber 9 to reduce the moving contact's movement speed. During the "closing" operation, before the spring 4 passes through the dead position, the moving contact 602 of the switchgear 601 does not have a slow operating phase that would allow the moving contact 602 to be driven by the motor 1, thus giving the operating mechanism better acceleration performance.

[0069] During the "opening" operation, which is the opposite of the "closing" operation, the motor 1 drives the screw 701 to rotate in the opposite direction through the second transmission gear 6, so that the nut 702 begins to move linearly along the screw 701 in the opposite direction, and pushes the second push arm 132 of the energy storage rod 13 through the protrusion 703, so that the energy storage rod 13 begins to rotate clockwise.

[0070] The rotation of the energy storage rod 13 can drive the spring 4 to rotate counterclockwise and be compressed to store energy. Due to the specific arrangement of the angle between the third push arm 121 and the fourth push arm 122 of the drive rod 12, the spring 4 will not reach its dead point position when the connecting pin 2 moves from the position where the connecting pin 2 contacts the fourth push arm 122 of the drive rod 12 (see Figure 4D) to the position where the connecting pin 2 contacts the third push arm 121 of the drive rod 12 (see Figure 4E).

[0071] Then, nut 702 continues to move linearly along screw 701 and pushes energy storage rod 13 to continue rotating clockwise, so that drive spring 4 is further compressed to store energy. Simultaneously, connecting pin 2 pushes drive rod 12 to begin slow clockwise rotation via bushing 14. The rotation of drive rod 12 drives output shaft 11 to rotate slowly, thereby driving moving contact 602 of switchgear 601 to begin a slow "opening" operation. The slow "opening" operation continues until spring 4 passes its dead position, then rapidly releases energy, thereby driving moving contact 602 to complete the entire "opening" operation.

[0072] Similarly, during the final stage of this operation, the buffer arm 10 connected to the output shaft 11 contacts the corresponding absorber 9 to reduce the moving contact's movement speed. Therefore, this operating mechanism effectively achieves the "fast closing, slow opening" operation of the switchgear 601.

[0073] It is understandable that the "fast opening and slow closing" operation of the switchgear 601 can also be achieved through an operating mechanism with a similar structure. It is also understandable that, due to the modular design of this operating mechanism, it can be configured to achieve the "fast opening and fast closing" operation of the switchgear 601 by simply changing the size and position of some components, such as increasing the angle between the third push arm 121 and the fourth push arm 122 of the drive rod 12 and / or changing the relative positions between at least some components (e.g., screw 701, nut 702, energy storage rod 13, connecting pin 2, spring 4, drive rod 12, and output shaft 11), so that during each period of the "opening" and "closing" operation of the switchgear 601, the spring 4 only rapidly releases energy to drive the drive rod 12 to rotate via the connecting pin 2 after it has rotated until it passes its dead point position.

[0074] Figure 5 , Figure 7 and Figure 9 These are schematic diagrams of various partial structures of the operating mechanism according to some other preferred embodiments, wherein... Figure 6 and Figure 8 It is shown Figure 5 and Figure 7 A schematic diagram of the components of the operating mechanism. As in the previously described embodiment, for the switching device 601 (in Figure 5 The operating mechanism of the moving contact 602 is shown only schematically, including a rotatable output shaft 11 (also called an output hub or main hub), which is configured to perform opening or closing operations of the switching device 601 by rotation.

[0075] The operating mechanism also includes a rotatable energy storage rod 13 (also referred to as a spring-loaded rod) and a spring 4. The Y-shaped energy storage rod 13 is configured to rotate via the motor 1 as previously described, i.e., via a screw 701 (which linearly moves the nut 702 along the screw 701), such that the first push arm 131 and the second push arm 132 of the energy storage rod 13 are actuated by the protrusion 703. More precisely, the screw 701 is connected to the motor 1 and configured to rotate via the motor 1, wherein the nut 702 is fitted onto the screw 701 and is thus configured to move linearly along the screw 701 as the screw 701 rotates. The nut 702 is provided with a protrusion 703 that pushes the energy storage rod 13. Thus, the spring 4 is correspondingly driven to compress and store energy.

[0076] The operating mechanism even includes a rotatable drive rod 12, which is torque-resistantly connected to the output shaft 11. The drive rod 12 is rotatably connected to the energy storage rod 13, or as... Figure 7 The ground anti-torque connection shown (and the corresponding drive rod 12 in) Figure 8 (as shown in the image), or as... Figure 5The drive rod 12 is shown to be freely-wheelingly connected to the energy storage rod 13, thereby allowing a rotational range of ≤60° between the drive rod 12 and the energy storage rod 13 (and the corresponding drive rod 12 is in...). Figure 6 (as shown in the image).

[0077] from Figure 6 As can be seen, to allow for free rotational rotatability, the energy storage rod 13 includes three arc-shaped energy storage rod slots 502, each extending over 60° and each slot being configured as an arc-shaped elongated hole. The drive rod 12 includes three axially extending pins 3 that slide within the energy storage rod slots 502, thus allowing for free rotational rotatability.

[0078] The drive rod 12 is also rotatably connected to the spring 4, allowing a rotational range of ≤60° between the drive rod 12 and the spring 4 to enable the opening or closing operation of the switchgear 601. Similar to the energy storage rod 13, the drive rod 12 includes an arc-shaped drive rod groove 501 that extends to cover 60° and is configured as an arc-shaped elongated hole, such as from... Figure 6 and Figure 8 You can see the details.

[0079] To actuate spring 4, energy storage rod 13 is pivotally connected to spring 4 via an axially extending connecting pin 2, which is securely attached to one end of the spring. Drive rod 12 is configured to rotate via connecting pin 2, which slides within drive rod groove 501, thus allowing rotatability between drive rod 12 and spring 4. Once the dead position of spring 4 has been passed, spring 4 releases energy to rotate drive rod 12 during at least one of the opening and closing operations of switchgear 601.

[0080] Figure 9 Another embodiment is shown, in which the output shaft 11 and the drive rod 12 are configured as a single unit. In this way, the pin 3 is attached to the output shaft 11 while sliding in the energy storage rod groove 502. Figure 5 , Figure 7 and Figure 9 All three implementations include two drive rods 12 (in Figure 9 The spring 4 is set as an integral part and has two energy storage rods 13. One end of the spring 4 is connected to the two energy storage rods 13 via two counter-extending connecting pins 2.

[0081] Although the invention has been illustrated and described in detail in the accompanying drawings and the foregoing description, such illustrations and descriptions are to be considered illustrative or exemplary rather than restrictive; the invention is not limited to the disclosed embodiments. Other variations to be disclosed will be understood and implemented by those skilled in the art in practicing the claimed invention, based on a study of the drawings, the disclosure, and the appended claims. Specifically, even Figures 5 to 9 Other preferred embodiments and in this respect with Figure 1 The embodiments described in Figure 4 are slightly different, but it will be clear to those skilled in the art that these are not standalone embodiments, i.e., these embodiments can be combined. For example, regarding Figure 1 The description of the "dead point" or screw 701 in Figure 4 also applies. Figures 7 to 9 The implementation method.

[0082] In the claims, the word "comprising" does not exclude other elements or steps, and the indefinite articles "a" or "an" do not exclude a plurality. The mere fact that certain means are recited in mutually different dependent claims does not indicate that a combination of these means cannot be used advantageously. Any reference numerals in the claims should not be construed as limiting the scope.

[0083] List of reference numerals

[0084] 1. Motor

[0085] 2 Connecting pins

[0086] 3. Selling

[0087] 4. Energy storage spring

[0088] 5 First bearing / sleeve

[0089] 6 Second transmission gear

[0090] 8 bases

[0091] 9 Absorbers

[0092] 10 Buffer Arms

[0093] 11. Output shaft, main hub

[0094] 12 drive rods, actuator rods

[0095] 13 energy storage rods, spring loading rods

[0096] 14 bushings

[0097] 101 First transmission gear

[0098] 111 spline

[0099] 121 Third Push Arm

[0100] 122 Fourth Push Arm

[0101] 131 First Push Arm

[0102] 132 Second Push Arm

[0103] 301 First Spring Seat

[0104] 302 Second Spring Seat

[0105] 303 Connecting Plate

[0106] 304 guide rod

[0107] 501 Drive rod slot

[0108] 502 Energy Storage Rod Slot

[0109] 601 Switchgear

[0110] 602 Moving Contact

[0111] 701 Screw

[0112] 702 Nut

[0113] 703 Protrusion

[0114] 704 Limit Rod

[0115] 705 micro switch

Claims

1. An operating mechanism for a switchgear (601), comprising: A rotatable output shaft (11) is configured to perform opening or closing operations of the switching device (601) by rotation. A rotatable energy storage rod (13) and a spring (4), wherein the energy storage rod (13) is configured to rotate by a motor (1) to drive the spring (4) to be compressed to store energy, and A rotatable drive rod (12), which is torque-resistantly connected to the output shaft (11), rotatably connected to the energy storage rod (13), and freely rotatably connected to the spring (4), allows a rotational range of ≤120° between the drive rod (12) and the spring (4), for realizing the opening or closing operation of the switchgear (601), wherein, The spring (4) is configured to release energy during at least one of the opening and closing operations of the switchgear (601) so as to rotate the drive rod (12) after passing through the dead position of the spring (4).

2. The operating mechanism according to claim 1, wherein, The drive rod (12) is connected to the energy storage rod (13) in a torque-resistant manner, or the drive rod (12) is rotatably connected to the energy storage rod (13) to allow a rotational range of ≤120° between the drive rod (12) and the energy storage rod (13).

3. The operating mechanism according to claim 1 or 2, wherein, The energy storage rod (13) is pivotally connected to the spring (4) via a connecting pin (2), and the drive rod (12) is configured to rotate via the connecting pin (2).

4. The operating mechanism according to claim 1 or 2, wherein, The drive rod (12) includes an arc-shaped drive rod groove (501) extending to cover ≤120°.

5. The operating mechanism according to claim 4, wherein, The drive rod groove (501) is configured as an arc-shaped elongated hole.

6. The operating mechanism according to claim 4, wherein, The connecting pin (2) slides freely within the drive rod groove (501).

7. The operating mechanism according to claim 1 or 2, wherein, The output shaft (11) and the drive rod (12) are configured as a single unit.

8. The operating mechanism according to claim 1 or 2, wherein, The energy storage rod (13) includes at least one arc-shaped energy storage rod slot (502) extending to cover ≤120°.

9. The operating mechanism according to claim 8, wherein, The energy storage rod (13) includes three energy storage rod slots (502) extending to cover ≤120°.

10. The operating mechanism according to claim 8, wherein, The energy storage rod slot is configured as an arc-shaped, elongated hole.

11. The operating mechanism according to claim 8, wherein, The drive rod (12) and / or the output shaft (11) include a pin (3) that slides freely within the energy storage rod slot (502).

12. The operating mechanism according to claim 1 or 2, wherein, The energy storage rod (13) has a Y shape.

13. The operating mechanism according to claim 1 or 2, comprising two drive rods (12) and / or two energy storage rods (13) arranged on both sides of the spring (4).

14. The operating mechanism according to claim 1 or 2, comprising a motor (1), a screw (701), and a nut (702), the screw being connected to the motor (1) and configured to rotate by the motor (1), the nut being sleeved on the screw (701) and configured to move linearly along the screw (701) as the screw (701) rotates, wherein, The nut (702) is provided with a protrusion (703) configured to push the energy storage rod (13).

15. The operating mechanism according to claim 1 or 2, comprising an absorber (9) and a buffer arm (10), the buffer arm being fixedly connected to one end of the output shaft (11) for contacting the absorber (9) during the final stage of the opening or closing operation of the switching device (601).

16. A switchgear (601) comprising a moving contact (602) and an operating mechanism for the switchgear (601) according to any one of claims 1 to 15, the operating mechanism being configured to drive the moving contact (602) to perform an opening or closing operation.

17. The switchgear (601) according to claim 16, wherein, The switchgear (601) is configured as a grounding switch, disconnecting switch, disconnecting grounding switch and fast grounding switch of a gas-insulated switchgear.

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