opening and closing device

Abstract

The present application provides an opening and closing device capable of easily achieving high speed of operation. In the opening and closing device of the embodiment, a transmission mechanism transmits a driving force of an operating mechanism to a second contact piece portion via a first contact piece portion, so that the second contact piece portion approaches the first contact piece portion when a closing operation is performed, and the second contact piece portion separates from the first contact piece portion when an opening operation is performed. The transmission mechanism has a reverse lever, a link connecting lever, and a fulcrum lever. One end portion of the reverse lever is rotatably connected to the second contact piece portion. The other end portion of the reverse lever is rotatably connected to one end portion of the link connecting lever. The other end portion of the link connecting lever is rotatably connected to the first contact piece portion. One end portion of the fulcrum lever is rotatably connected to the closed container. The other end portion of the fulcrum lever is rotatably connected to a reverse lever fulcrum portion.

Description

Technical Field

[0001] Embodiments of the present invention relate to opening and closing devices. Background Technology

[0002] Switching devices are installed in power systems to interrupt fault currents, lead currents, delay load currents such as reactor disconnection, etc.

[0003] The switching device, for example, is a compressed gas circuit breaker, configured such that a movable-side contact and an opposing-side contact are arranged opposite each other inside a sealed container filled with arc-extinguishing gas. The movable-side contact is driven to perform a closing action (connection action) and an opening action (disconnection action). The movable-side contact includes a movable-side arc contact and a movable-side energized contact, and the opposing-side contact includes an opposing-side arc contact and an opposing-side energized contact.

[0004] In a gas circuit breaker, the closing action brings the movable-side arc contact to contact with the opposing-side arc contact, and also brings the movable-side energized contact to contact with the opposing-side energized contact, energizing the circuit (connected state). Conversely, the opening action separates the opposing-side arc contact from the movable-side arc contact, and also separates the opposing-side energized contact from the movable-side energized contact, energizing the circuit (disconnected state). In a compressed air gas circuit breaker, during the opening action that changes the circuit from the energized state to the disconnected state, arc-extinguishing gas is blown to extinguish the arc discharge generated between the opposing-side and movable-side arc contacts. This achieves disconnection at the zero current point.

[0005] The operating mechanism that drives the movable side contact part is, for example, a spring-operated mechanism that utilizes the force of a spring. Compared with hydraulic operating mechanisms, spring-operated mechanisms offer superior maintainability and reliability, but have lower driving energy. Therefore, when using spring-operated mechanisms, in order to perform actions such as cutting off or connecting at high speed, it is necessary to miniaturize and lighten the movable side contact part.

[0006] Existing technical documents

[0007] Patent documents

[0008] Patent Document 1: Japanese Patent Publication No. 7-109744

[0009] Patent Document 2: Japanese Patent Application Publication No. 2004-119315

[0010] The problem that the invention aims to solve

[0011] To perform actions at high speed with low driving energy, a technique has been proposed that connects the movable side contact member and the opposing side contact member using a transmission mechanism, and transmits the driving energy used to perform the action to the opposing side contact member along with the movable side contact member. In this case, the opposing side contact member moves to the side opposite to the direction of movement of the movable side contact member through the transmission mechanism, thus increasing the speed of the opening and closing device.

[0012] However, while the driving force used to drive the opposing contact part is intended to move it, it sometimes acts in a direction orthogonal to the direction of movement of the opposing contact part. Therefore, due to the component in the direction orthogonal to the direction of movement of the opposing contact part, the frictional force in the sliding portions of both the movable and opposing contact parts increases, sometimes making smooth operation difficult. Consequently, it is sometimes difficult to achieve high-speed operation of the opening and closing device. Summary of the Invention

[0013] Therefore, the problem to be solved by the present invention is to provide an opening and closing device that can easily achieve high-speed operation.

[0014] Methods for solving problems

[0015] The opening and closing device of this embodiment includes a sealed container, a first contact portion, a second contact portion, an operating mechanism, and a transmission mechanism. It performs a closing action to change the circuit from an open state to a closed state, and an opening action to change the circuit from a closed state to an open state. The first contact portion is housed inside the sealed container. The second contact portion is arranged inside the sealed container opposite to the first contact portion. The operating mechanism drives the first contact portion such that when performing the closing action, the first contact portion approaches the second contact portion, and when performing the opening action, the first contact portion separates from the second contact portion. The transmission mechanism transmits the driving force of the operating mechanism from the first contact portion to the second contact portion in such a way that when performing the closing action, the second contact portion approaches the first contact portion, and when performing the opening action, the second contact portion separates from the first contact portion. The transmission mechanism includes a reversing lever, a connecting link, and a fulcrum lever. The reversing lever includes one end of the reversing lever, another end of the reversing lever located on the opposite side of the first end, and a fulcrum lever located between the first end and the other end. The connecting rod includes one end of the connecting rod and another end of the connecting rod located on the opposite side of the first end of the connecting rod. The fulcrum rod includes one end of the fulcrum rod and another end of the fulcrum rod located on the opposite side of the first end of the fulcrum rod. One end of the reversing rod is rotatably connected to the second contact part.

[0016] The other end of the reversing lever is rotatably connected to one end of the connecting rod. The other end of the connecting rod is rotatably connected to the first contact part. One end of the fulcrum lever is rotatably connected to the sealed container. The other end of the fulcrum lever is rotatably connected to the fulcrum part of the reversing lever. Attached Figure Description

[0017] Figure 1A A cross-sectional view (closed state (energized state)) schematically showing the configuration of the opening and closing device of the first embodiment.

[0018] Figure 1B This is a cross-sectional view (cut-off process) illustrating the situation when the opening action (cut-off action) is performed in the opening and closing device of the first embodiment.

[0019] Figure 1C This is a schematic cross-sectional view (open state (closed state)) showing the situation when the opening action (closing action) is performed in the opening and closing device of the first embodiment.

[0020] Figure 2A A cross-sectional view (closed state (energized state)) schematically showing the configuration of the opening and closing device of the second embodiment.

[0021] Figure 2B This is a cross-sectional view (cut-off process) illustrating the opening action (cut-off action) performed in the opening and closing device of the second embodiment.

[0022] Figure 2C This is a cross-sectional view (open state (closed state)) illustrating the situation when the opening action (closing action) is performed in the opening and closing device of the second embodiment.

[0023] Explanation of reference numerals in the attached figures

[0024] 1: Sealed container; 10: Movable side unit; 11: Movable side arc contact; 12: Movable side energized contact; 20: Opposite side unit; 21: Opposite side arc contact; 22: Opposite side energized contact; 30: Operating mechanism; 40: Transmission mechanism; 41: Reversing rod; 41A: One end of the reversing rod; 41B: The other end of the reversing rod; 41C: Reversing rod fulcrum; 42: Connecting rod; 42A: One end of the connecting rod; 42B: The other end of the connecting rod; 43: Fulcrum rod; 43A: One end of the fulcrum rod; 43B: The other end of the fulcrum rod; 45: Connecting rod; 45A: One end of the connecting rod; 45B: The other end of the connecting rod; 46: Converting rod; 46A: One end of the converting rod; 46B: The other end of the converting rod; 4 6C: Converter lever fulcrum, 101: Operating lever, 102: Cylinder body, 103: Piston, 105: Movable side contact part, 107: Piston support, 109: Insulating nozzle, 121: Cylinder body cylindrical part, 122: Cylinder body bottom plate part, 201: Support cylinder, 202: Support member, 205: Opposite side contact part, 211: Sliding smooth part, 221: Support plate part, 222: Support rod part, 301: Insulating rod, 401: Connecting part, H102: Discharge port, K201: Support cylinder opening part, K201a: Support cylinder opening part, PR: Mechanical air chamber, R109: Nozzle internal space, R109a: First nozzle internal space part, R109b: Second nozzle internal space part, R109c: Third nozzle internal space part. Detailed Implementation

[0025] <First Implementation Method>

[0026] [A] Composition of the opening and closing device

[0027] Figure 1A This is a cross-sectional view schematically illustrating the configuration of the opening and closing device in the first embodiment. Figure 1A In the diagram, the vertical direction is z, the horizontal direction is x, and the direction perpendicular to the plane of the paper is y, which is orthogonal to both z and x. Figure 1A This shows the situation when the opening and closing device is in the closed state (energized state).

[0028] like Figure 1A As shown, the switching device of this embodiment is a compressed gas circuit breaker, comprising a sealed container 1, a movable side unit 10, an opposing side unit 20, an operating mechanism 30, and a transmission mechanism 40. Each part of the switching device in this embodiment is configured to perform a closing action that changes the circuit from an open state (disconnected state) to a closed state (energized state), and an opening action that changes the circuit from a closed state to an open state. The components constituting the switching device will be described sequentially.

[0029] [A-1] Sealed Container 1

[0030] The sealed container 1 is made of metallic material and is grounded. Although not shown in the figure, a pair of wires constituting a circuit are connected to the movable side unit 10 and the opposing side unit 20, respectively, within the sealed container 1. Each pair of wires is supported by a pair of spacers, and each wire is electrically insulated from the sealed container 1 by the spacers.

[0031] The sealed container 1 is filled with an arc-quenching gas. Here, the arc-quenching gas is a gas with excellent arc-quenching and insulating properties, such as sulfur hexafluoride (SF6), air, carbon dioxide, oxygen, nitrogen, or a mixture of the above. Compared to sulfur hexafluoride, the arc-quenching gas is preferably a gas with a low global warming potential, a small molecular weight, and a gaseous phase at at least one atmosphere and below 20 degrees Celsius.

[0032] [A-2] Movable side unit 10

[0033] The movable side unit 10 is housed inside the sealed container 1. The movable side unit 10 includes an operating lever 101, a cylinder 102, a piston 103, a movable side contact part 105, and an insulating nozzle 109. In the movable side unit 10, the operating lever 101, cylinder 102, piston 103, and movable side contact part 105 are each formed of, for example, metal material and are electrically connected to a wire (not shown) supported on one of a pair of insulators.

[0034] [A-2-1] Control lever 101

[0035] The operating lever 101 is, for example, a cylindrical tubular body. The operating lever 101 is connected to the operating mechanism 30 via an insulating rod 301. The operating lever 101 is configured to move axially, for example, along the x-direction, via the operating mechanism 30.

[0036] [A-2-2] Cylinder block 102

[0037] The cylinder block 102 includes a cylinder cylindrical portion 121 and a cylinder bottom plate portion 122.

[0038] The cylinder body cylindrical portion 121 is, for example, a cylindrical tubular body. The inner diameter of the cylinder body cylindrical portion 121 is larger than the outer diameter of the operating lever 101, and the operating lever 101 is housed inside the cylinder body cylindrical portion 121. The cylinder body cylindrical portion 121 and the operating lever 101 are coaxially arranged.

[0039] The cylinder block bottom plate portion 122 is, for example, a circular plate-shaped body, located at the end of the cylinder block cylindrical portion 121 on the side where the opposing side unit 20 is located. An operating lever 101 passes through the center of the cylinder block bottom plate portion 122. In addition, an outlet H102 is formed in the cylinder block bottom plate portion 122. The outlet H102 passes through the operating lever 101 axially.

[0040] The cylinder body 102 is fixed to the operating lever 101 and the two are electrically connected. The cylinder body 102 is configured to slide axially on the operating lever 101 together with the operating lever 101 via the operating mechanism 30.

[0041] [A-2-3] Piston 103

[0042] The piston 103 is housed inside the cylinder 102.

[0043] The piston 103 is, for example, an annular body, and is coaxially arranged with the operating rod 101. The outer diameter of the piston 103 is the same as the inner diameter of the cylinder 102. The operating rod 101 passes through the piston 103 and can slide axially relative to the piston 103.

[0044] Piston 103 divides the interior of cylinder 102 in the axial direction. Inside cylinder 102, the space located on the opposite side unit 20 of piston 103 is the mechanical compressor chamber PR.

[0045] The mechanical compressor chamber PR is configured such that its volume changes as it moves axially along with the cylinder 102 and the operating lever 101. Details will be described later, but during the cutting process, the volume of the mechanical compressor chamber PR decreases, thereby increasing the pressure of the arc-extinguishing gas introduced into the mechanical compressor chamber PR. Furthermore, the arc-extinguishing gas, after its pressure increase in the mechanical compressor chamber PR, is discharged from the mechanical compressor chamber PR through the outlet H102 of the cylinder 102.

[0046] Piston 103 is supported by piston holder 107. Although not shown in the figure, it is fixed to the sealed container 1 via piston holder 107. Piston holder 107 is, for example, a cylindrical tubular body, coaxially arranged with operating rod 101. The inner diameter of piston holder 107 is larger than the outer diameter of operating rod 101, and the outer diameter of piston holder 107 is smaller than the inner diameter of piston 103. Piston holder 107 is, for example, integrally formed with piston 103.

[0047] [A-2-4] Movable side contact part 105

[0048] The movable side contact part 105 (first contact part) has a movable side arc contact 11 and a movable side energized contact 12, and is configured to slide axially together with the operating lever 101 via the operating mechanism 30.

[0049] [A-2-4-1] Movable side arc contact 11

[0050] The movable side arc contact 11 is, for example, a cylindrical tubular body, coaxially arranged with the operating lever 101. Here, the movable side arc contact 11 is connected to the end of the operating lever 101 located on the opposite side unit 20 side, and is electrically connected to the operating lever 101. The movable side arc contact 11 has, for example, the same diameter as the operating lever 101.

[0051] In the movable-side arc contact 11, the front end portion located on the opposite-side unit 20 side is configured to bulge inward. Furthermore, in the movable-side arc contact 11, the front end portion may also be divided into multiple parts in the circumferential direction, forming flexible finger electrodes.

[0052] [A-2-4-2] Movable side energized contact 12

[0053] The movable side energized contact 12 is, for example, a cylindrical tubular body, and is coaxially arranged with the operating lever 101.

[0054] The movable-side energized contact 12 includes a portion that internally houses the insulating nozzle 109 and the movable-side arc contact 11. The movable-side energized contact 12 is fixed to the cylinder base plate portion 122 of the cylinder body 102 in such a way that it surrounds the insulating nozzle 109 and the movable-side arc contact 11, and is electrically connected to the cylinder body 102.

[0055] Here, the movable side energized contact 12 is configured such that the inner diameter of the movable side energized contact 12 is the same as the outer diameter of the portion of the insulating nozzle 109 located on the operating mechanism 30 side.

[0056] [A-2-5] Insulating Nozzle 109

[0057] The insulating nozzle 109 is formed of insulating material. The insulating nozzle 109 is, for example, a cylindrical tubular body, which is coaxially arranged with the operating rod 101 inside the sealed container 1.

[0058] The insulating nozzle 109 is fixed to the cylinder body 102 and moves together with the cylinder body 102 via the operating mechanism 30. The insulating nozzle 109 is configured such that the arc-extinguishing gas, after its pressure rises in the mechanical compressor chamber PR during the cutting process, is discharged from the mechanical compressor chamber PR, and the arc discharge generated during the cutting process is extinguished. That is, the insulating nozzle 109 and the mechanical compressor chamber PR function as an airflow generating unit.

[0059] The internal space R109 of the insulating nozzle 109 includes a first internal space R109a, a second internal space R109b, and a third internal space R109c. The first internal space R109a, the second internal space R109b, and the third internal space R109c are arranged sequentially in the axial direction from the movable side unit 10 to the opposite side unit 20, and are interconnected with each other.

[0060] The first nozzle internal space R109a houses the movable side arc contact 11. A gap is formed between the insulating nozzle 109 and the movable side arc contact 11 within the first nozzle internal space R109a. The second nozzle internal space R109b has an inner diameter smaller than that of the first nozzle internal space R109a. The third nozzle internal space R109c has an inner diameter larger than that of the second nozzle internal space R109b.

[0061] [A-3] Opposite side unit 20

[0062] The opposing side unit 20 is housed inside the sealed container 1. The opposing side unit 20 is arranged inside the sealed container 1 in a manner opposite to the movable side unit 10.

[0063] The opposing side unit 20 includes a support cylinder 201, a support member 202, and an opposing side contact portion 205. In the opposing side unit 20, the support cylinder 201, the support member 202, and the opposing side contact portion 205 are each formed of, for example, a metallic material and are electrically connected to a wire (not shown) supported by the other insulator of a pair of insulators.

[0064] [A-3-1] Support cylinder 201

[0065] The support cylinder 201 is, for example, a cylindrical tubular body, and is coaxially arranged with the operating rod 101 inside the sealed container 1. Although not shown in the figure, the support cylinder 201 supports the sealed container 1 inside the sealed container 1.

[0066] [A-3-2] Support component 202

[0067] The support member 202 includes a support plate portion 221 and a support rod portion 222, and is housed inside the support cylinder 201. The support member 202 is constructed, for example, by stacking multiple conductor plates.

[0068] The support plate portion 221 is, for example, a circular plate-shaped body, and is coaxially arranged with the support cylinder 201.

[0069] The support rod portion 222 is, for example, a cylindrical rod-shaped body that extends axially. The support rod portion 222 is coaxially arranged with the support cylinder 201. The support rod portion 222 is provided in the support plate portion 221 on the side opposite to the movable side unit 10.

[0070] [A-3-3] Opposite side contact part 205

[0071] The opposing side contact portion 205 (second contact portion) includes an opposing side arc contact 21 and an opposing side energized contact 22.

[0072] [A-3-3-1] Opposite side arc contact 21

[0073] The opposing side arc contact 21 is, for example, a cylindrical rod-shaped body, coaxial with the support cylinder 201.

[0074] The opposing side arc contact 21 extends axially and is supported by the support member 202 inside the support cylinder 201. Specifically, the opposing side arc contact 21 is fixed to the surface located on the movable side unit 10 side in the support plate portion 221 constituting the support member 202. The opposing side arc contact 21 may also be integrally formed with the support member 202.

[0075] The front end of the opposite side arc contact 21 located on the movable side unit 10 side is curved and has rounded corners.

[0076] like Figure 1A As shown, when the opening and closing device is in the closed state (energized state), the opposing side arc contact 21 is inserted into the nozzle internal space R109 of the insulating nozzle 109. The outer diameter of the opposing side arc contact 21 is, for example, the same as that of the second nozzle internal space R109b, and smaller than the inner diameters of the first nozzle internal space R109a and the third nozzle internal space R109c.

[0077] Furthermore, the outer diameter of the opposing side arc contact 21 is, for example, the same as the inner diameter of the front end portion of the movable side arc contact 11, such as... Figure 1A As shown, when the opening and closing device is in the closed state (energized state), the inner peripheral surface of the movable side arc contact 11 is in contact with the outer peripheral surface of the opposite side arc contact 21, and the two are electrically connected.

[0078] [A-3-3-2] Opposite side energized contact 22

[0079] The opposing side energized contact 22 is, for example, a cylindrical tubular body, coaxially arranged with the support cylinder 201.

[0080] The opposing side energized contact 22 is supported on the support member 202. The opposing side energized contact 22 internally houses the support plate portion 221 that constitutes the support member 202 and is fixed to the outer peripheral surface of the support plate portion 221.

[0081] The portion of the opposing-side energized contact 22 located on the movable-side unit 10 side protrudes outward from the support cylinder 201. In the opposing-side energized contact 22, the front end of the portion located on the movable-side unit 10 side is configured to bulge inward.

[0082] The portion of the opposing-side energized contact 22 located on the opposite side relative to the movable-side unit 10 is housed inside the support cylinder 201. Here, the outer diameter of the opposing-side energized contact 22 is approximately the same as the inner diameter of the support cylinder 201, and the opposing-side energized contact 22 is configured to slide axially together with the support member 202 inside the support cylinder 201.

[0083] In this embodiment, a sliding smoothing portion 211 is embedded in the portion of the inner circumferential surface of the support cylinder 201 that abuts against the outer circumferential surface of the opposing-side energized contact 22. The sliding smoothing portion 211 has, for example, a lower coefficient of friction than the support cylinder 201, to allow the opposing-side energized contact 22 to slide smoothly on the inner circumferential surface of the support cylinder 201. The sliding smoothing portion 211 is made of a conductor, electrically connecting the support cylinder 201 and the opposing-side energized contact 22. Furthermore, the sliding smoothing portion 211 can also be configured to elastically deform relative to the sliding of the opposing-side energized contact 22.

[0084] The inner diameter of the front end portion of the opposing-side energized contact 22 is, for example, the same as the outer diameter of the movable-side energized contact 12, such as... Figure 1A As shown, when the opening and closing device is in the closed state (energized state), the outer peripheral surface of the movable side energized contact 12 is in contact with the inner peripheral surface of the opposite side energized contact 22, and the two are electrically connected.

[0085] [A-4] Operating mechanism 30

[0086] The operating mechanism 30 is located outside the sealed container 1. The operating mechanism 30 is, for example, a spring operating mechanism that utilizes the force of a spring to drive the movable side contact part 105.

[0087] In this embodiment, the operating mechanism 30 moves the piston 103 and the insulating nozzle 109 together with the movable side contact portion 105 axially by operating the operating lever 101 axially.

[0088] Specifically, when the operating mechanism 30 performs the closing action, it operates by bringing the movable side contact portion 105 close to the opposing side contact portion 205. As a result, the movable side arc contact 11 and the opposing side arc contact 21 are in contact, the movable side energized contact 12 and the opposing side energized contact 22 are in contact, and the movable side contact portion 105 and the opposing side contact portion 205 are in a closed state of electrical connection (energized state).

[0089] In contrast, when the operating mechanism 30 performs the opening action, it operates in a manner that separates the movable side contact portion 105 from the opposing side contact portion 205. As a result, the movable side arc contact 11 and the opposing side arc contact 21 are separated, and the movable side energized contact 12 and the opposing side energized contact 22 are separated, and the movable side contact portion 105 and the opposing side contact portion 205 are in an electrically insulated open state (cut-off state).

[0090] [A-5] Transmission mechanism 40

[0091] The transmission mechanism 40 has a connecting member 401, a reversing rod 41, a connecting link 42 and a fulcrum rod 43, and is configured to transmit the driving force of the operating mechanism 30 to the opposing contact member 205 via the movable side contact member 105.

[0092] [A-5-1] Connecting component 401

[0093] In the transmission mechanism 40, the connecting member 401 is, for example, a cylindrical rod. The connecting member 401 extends axially through the support plate portion 221 that constitutes the support member 202. One end of the connecting member 401 located on the operating mechanism 30 side is fixed to the insulating nozzle 109, for example. The connecting member 401 is configured to slide axially as the insulating nozzle 109 and the like move axially through the operating mechanism 30.

[0094] [A-5-2] Reverse lever 41

[0095] In the transmission mechanism 40, the reversing rod 41 is, for example, a plate-like body, including one end 41A of the reversing rod and another end 41B of the reversing rod located on the opposite side of the first end 41A. Furthermore, the reversing rod 41 includes a reversing rod fulcrum portion 41C. The reversing rod fulcrum portion 41C is located between the first end 41A and the other end 41B of the reversing rod. The reversing rod 41 passes through a support cylinder opening K201 formed on the circumferential surface of the support cylinder 201, with the first end 41A located inside the support cylinder 201 and the other end 41B located outside the support cylinder 201.

[0096] [A-5-3] Connecting Link 42

[0097] In the transmission mechanism 40, the connecting rod 42 is, for example, a plate-like body, including one end 42A of the connecting rod and another end 42B of the connecting rod located on the opposite side of the first end 42A. The connecting rod 42 passes through the support cylinder opening K201 formed on the circumferential surface of the support cylinder 201, the other end 42B of the connecting rod is located inside the support cylinder 201, and the first end 42A of the connecting rod is located outside the support cylinder 201.

[0098] [A-5-4] Pivot rod 43

[0099] In the transmission mechanism 40, the fulcrum rod 43 includes one end 43A of the fulcrum rod and another end 43B of the fulcrum rod located on the opposite side of the one end 43A. The fulcrum rod 43 is disposed inside the portion of the support cylinder 201 in which the support cylinder opening K201 is formed.

[0100] [A-5-5] Connections at each end

[0101] One end 41A of the reversing lever is rotatably connected to the opposite contact portion 205 via the support member 202. Here, one end 41A of the reversing lever is rotatably connected to the end of the support rod portion 222 constituting the support member 202 located on the opposite side relative to the operating mechanism 30 side.

[0102] Furthermore, the other end 41B of the reversing lever is rotatably connected to one end 42A of the connecting lever.

[0103] Furthermore, the other end 42B of the connecting rod is rotatably connected to the movable contact portion 105 via the connecting member 401. Here, the other end 42B of the connecting rod is rotatably connected to the end of the connecting member 401 located on the opposite side to the operating mechanism 30 side.

[0104] One end 43A of the fulcrum rod is rotatably connected to the support cylinder 201. The other end 43B of the fulcrum rod is rotatably connected to the fulcrum part 41C of the reversing rod.

[0105] One end 41A of the reversing rod, the other end 41B of the reversing rod, one end 42A of the connecting rod, the other end 42B of the connecting rod, one end 43A of the fulcrum rod, and the other end 43B of the fulcrum rod are respectively configured to rotate around a direction orthogonal to the axial direction (direction y in the figure) as the axis of rotation.

[0106] [B] Operation of the opening and closing device

[0107] The operation of the opening and closing device in this embodiment will be explained in detail.

[0108] [B-1] Closing action (connecting action)

[0109] First, the closing action (connecting action) will be explained. The closing action is executed by the control device (not shown) based on the connection command, which controls the operation mechanism 30.

[0110] After the closing action is performed in the opening and closing device, such as Figure 1A As already shown, the opening and closing device is in the closed state (energized state).

[0111] When the opening and closing device is in the closed state, the movable side arc contact 11 and the opposite side arc contact 21 are in contact, and the movable side energized contact 12 and the opposite side energized contact 22 are in contact. When the opening and closing device is in the closed state, the support cylinder 201, the opposite side energized contact 22, the movable side energized contact 12, and the cylinder body 102 are electrically connected, and current flows.

[0112] [B-2] Opening action (cutting off action)

[0113] Next, the opening action (cut-off action) will be explained. The opening action is performed by a control device (not shown) controlling the operation mechanism 30 based on a cut-off command. The opening action is performed, for example, to cut off an emergency current.

[0114] Figure 1B and Figure 1C This is a cross-sectional view schematically illustrating the situation when an opening action (cut-off action) is performed in the opening and closing device of the first embodiment. Figure 1B The diagram illustrates a cutting-off process that occurs midway through the process of performing an opening action (cutting-off action) to reach an open state (cut-off state). Figure 1C The image shows the state after the opening action (cut-off action) is completed and the system becomes open (cut-off).

[0115] like Figure 1B and Figure 1C As shown, when the opening and closing device is opened from a closed state (energized state) to an open state (disconnected state) by performing an opening action, the movable side energized contact 12 and the opposite side energized contact 22 change from a contact state to a separated state. Afterwards, the movable side arc contact 11 and the opposite side arc contact 21 change from a contact state to a separated state.

[0116] When the movable-side arc contact 11 and the opposing-side arc contact 21 separate in the nozzle internal space R109 of the insulating nozzle 109, an arc discharge (not shown) is generated between the movable-side arc contact 11 and the opposing-side arc contact 21. In the opening and closing device, as the opening action proceeds, the cylinder 102 moves around the piston 103. Therefore, the volume of the mechanical compression chamber PR provided inside the cylinder 102 decreases, and the pressure of the arc-extinguishing gas introduced into the mechanical compression chamber PR increases. Moreover, the arc-extinguishing gas is ejected from the mechanical compression chamber PR into the nozzle internal space R109 of the insulating nozzle 109 through the outlet H102. As a result, the arc discharge (not shown) generated between the movable-side arc contact 11 and the opposing-side arc contact 21 in the nozzle internal space R109 is extinguished by the arc-extinguishing gas ejected from the outlet H102. The arc discharge is extinguished when the current reaches zero, and the opening action is completed.

[0117] In the opening and closing device of this embodiment, as described above, the transmission mechanism 40 transmits the driving force of the operating mechanism 30 to the opposing contact member 205 via the movable side contact member 105. Therefore, in this embodiment, when the opening action is performed, the movable side contact member 105 moves axially toward the operating mechanism 30 side (right side in the figure), and the opposing side contact member 205 moves axially toward the side opposite to the operating mechanism 30 side (left side in the figure).

[0118] [B-2-1] Operation of connecting component 401

[0119] In the transmission mechanism 40, as the movable side contact part 105 moves, the connecting part 401 moves axially toward the operating mechanism 30, and the other end 42B of the connecting rod 42 connected to the connecting part 401 also moves axially toward the operating mechanism 30.

[0120] [B-2-2] Action of Reverse lever 41

[0121] In the transmission mechanism 40, the reversing lever 41 moves counterclockwise (in the first rotation direction) as the other end 42B of the connecting rod moves, with the part where the other end 43B of the fulcrum rod is rotatably connected to the fulcrum part 41C of the reversing lever as the center of rotation. As a result, the other end 41B of the reversing lever 41 moves toward the operating mechanism 30, and one end 41A of the reversing lever moves toward the side opposite to the operating mechanism 30.

[0122] As one end 41A of the reversing lever moves, the support member 202 moves axially to the side opposite to the operating mechanism 30. Consequently, the opposing contact portion 205 supported on the support member 202 also moves axially to the side opposite to the operating mechanism 30. That is, axially, the opposing contact portion 205 moves to the side opposite to the movable contact portion 105.

[0123] [B-2-3] Action of connecting link 42

[0124] In the transmission mechanism 40, as the connecting member 401 moves, the connecting rod 42 rotates about the part of the connecting rod 42B that is rotatably connected to the support member 202 as the rotation center axis.

[0125] Here, the connecting rod 42 first rotates counterclockwise about the part of the connecting rod 42B that is rotatably connected to the support 202, with the part being the axis of rotation. As a result, in the connecting rod 42, one end 42A moves axially toward the operating mechanism 30 and radially from the inside to the outside (see reference). Figure 1A and Figure 1B ).

[0126] Subsequently, the connecting rod 42 rotates and moves in a clockwise direction (second rotation direction) about the part of the connecting rod 42B that is rotatably connected to the support member 202, with the rotation center axis as the axis of rotation. Thus, in the connecting rod 42, one end 42A moves axially toward the operating mechanism 30 and radially from the outside to the inside (see reference). Figure 1B and Figure 1C ).

[0127] [B-2-4] Movement of pivot rod 43

[0128] In the transmission mechanism 40, as the connecting component 401 moves, the fulcrum rod 43 rotates around the part of the fulcrum rod 43A that is rotatably connected to the support cylinder 201 as the rotation center axis.

[0129] Here, the fulcrum rod 43 first rotates counterclockwise around the part of the fulcrum rod 43A that is rotatably connected to the support cylinder 201 as the axis of rotation. Consequently, the other end 43B of the fulcrum rod 43 moves radially from the inside to the outside (see reference). Figure 1A and Figure 1B ).

[0130] Subsequently, the fulcrum rod 43 rotates clockwise about the portion of the fulcrum rod 43A that is rotatably connected to the support cylinder 201, with the fulcrum rod end 43A as the axis of rotation. As a result, the other end 43B of the fulcrum rod 43 moves radially from the outside to the inside (see reference). Figure 1B and Figure 1C ).

[0131] [C] Summary

[0132] As described above, in this embodiment, the opening and closing device is provided with a transmission mechanism 40 that transmits the driving force of the operating mechanism 30 to the opposing contact member 205 via the movable side contact member 105. The transmission mechanism 40 transmits the driving force of the operating mechanism 30 to the opposing side contact member 205 such that the movement direction of the opposing side contact member 205 is opposite to the movement direction of the movable side contact member 105. Therefore, in this embodiment, even when the driving force of the operating mechanism 30 is relatively low, the relative movement speed of the movable side contact member 105 relative to the opposing side contact member 205 can be increased.

[0133] In the opening and closing device of this embodiment, as described above, the transmission mechanism 40 includes a reversing rod 41, a connecting rod 42, and a fulcrum rod 43. The reversing rod 41 includes a reversing rod end 41A, a reversing rod end 41B located opposite to the reversing rod end 41A, and a reversing rod fulcrum portion 41C located between the reversing rod end 41A and the reversing rod end 41B. The connecting rod 42 includes a connecting rod end 42A and a connecting rod end 42B located opposite to the connecting rod end 42A. The fulcrum rod 43 includes a fulcrum rod end 43A and a fulcrum rod end 43B located opposite to the fulcrum rod end 43A. Here, one end 41A of the reversing lever is rotatably connected to the opposite contact portion 205 via the support member 202, and the other end 41B of the reversing lever is rotatably connected to one end 42A of the connecting rod, and the other end 42B of the connecting rod is rotatably connected to the movable contact portion 105. Furthermore, one end 43A of the fulcrum rod is rotatably connected to the sealed container 1 via the support cylinder 201, and the other end 43B of the fulcrum rod is rotatably connected to the reversing lever fulcrum portion 41C.

[0134] In this embodiment, during opening (cutting) operations, the reversing lever 41 in the transmission mechanism 40 rotates about one end 41A of the reversing lever as its rotation center, with the other end 41B of the reversing lever approaching the movable side unit 10. At this time, a force is applied to the opposing side contact member 205 via the support member 202 in a direction orthogonal to the moving direction of the opposing side contact member 205 (here, longitudinal). Therefore, due to the component of the direction orthogonal to the moving direction of the opposing side contact member 205, the frictional force in the sliding portions of the movable side contact member 105 and the opposing side contact member 205 increases, sometimes making smooth operation difficult.

[0135] However, the transmission mechanism 40 of this embodiment includes a fulcrum rod 43, one end 43A of which is rotatably connected to the sealed container 1 via the support cylinder 201, and the other end 43B of which is rotatably connected to the reversing rod fulcrum portion 41C of the reversing rod 41. Therefore, in this embodiment, as the reversing rod 41 rotates, the other end 43B of the fulcrum rod 43 rotates about the fulcrum rod end 43A as the rotation center. That is, the rotation of the fulcrum rod 43 is generated by the component of the direction orthogonal to the moving direction of the opposing side contact member portion 205. As a result, the force of the component of the direction orthogonal to the moving direction of the opposing side contact member portion 205 acting on the movable side contact member portion 105 and the sliding portion of the opposing side contact member portion 205 is reduced.

[0136] Therefore, in the opening and closing device of this embodiment, it is possible to prevent the increase of friction in the sliding part, thus making it easy to achieve high-speed operation.

[0137] <Second Implementation Method>

[0138] [A] Composition of the opening and closing device

[0139] Figure 2A This is a cross-sectional view schematically illustrating the configuration of the opening and closing device in the second embodiment. Figure 2A In, with Figure 1A The same scenario is shown when the opening and closing device is in the closed state (energized state).

[0140] In the opening and closing device of this embodiment, such as Figure 2A As shown, the configuration of the transmission mechanism 40 is the same as that in the first embodiment (see reference). Figure 1A The differences are minor. Aside from this point and related matters, this embodiment is the same as the first embodiment. Therefore, details regarding repetitive items are appropriately omitted.

[0141] In the opening and closing device of this embodiment, such as Figure 2A As shown, the transmission mechanism 40 includes a connecting member 401, a reversing rod 41, a connecting rod 42 (first connecting rod), a fulcrum rod 43, a connecting rod 45 (second connecting rod), and a conversion rod 46, and is configured to transmit the driving force of the operating mechanism 30 to the opposing contact member 205 via the movable side contact member 105.

[0142] [A-1] Connecting component 401

[0143] In the transmission mechanism 40, the connecting component 401 is configured in the same way as in the first embodiment.

[0144] [A-2] Reverse lever 41

[0145] In the transmission mechanism 40, the reversing rod 41 is, for example, a plate-like body, including one end 41A of the reversing rod and another end 41B of the reversing rod located on the opposite side of the first end 41A. Furthermore, the reversing rod 41 includes a reversing rod fulcrum portion 41C. The reversing rod fulcrum portion 41C is located between the first end 41A and the other end 41B of the reversing rod. The reversing rod 41 passes through a support cylinder opening K201a formed in the circumferential surface of the support cylinder 201, with the first end 41A located inside the support cylinder 201 and the other end 41B located outside the support cylinder 201.

[0146] [A-3] Connecting Link 42 (First Connecting Link)

[0147] In the transmission mechanism 40, the connecting rod 42 (first connecting rod) is, for example, a plate-like body, including one end 42A of the connecting rod and another end 42B of the connecting rod located on the opposite side of the first end 42A. The connecting rod 42 is housed inside the support cylinder 201.

[0148] [A-4] Pivot rod 43

[0149] In the transmission mechanism 40, the fulcrum rod 43 includes one end 43A of the fulcrum rod and another end 43B of the fulcrum rod located on the opposite side of the one end 43A of the fulcrum rod. The fulcrum rod 43 is disposed inside the portion of the support cylinder 201 in which the support cylinder opening K201a is formed.

[0150] [A-5] Connecting Link 45 (Second Connecting Link)

[0151] In the transmission mechanism 40, the connecting rod 45 (second connecting rod) includes one end 45A (one end of the second connecting rod) and the other end 45B (the other end of the second connecting rod) located on the opposite side of the first end 45A. The connecting rod 45 passes through the support cylinder opening K201a formed in the circumferential surface of the support cylinder 201, with one end 45A located inside the support cylinder 201 and the other end 45B located outside the support cylinder 201.

[0152] [A-6] Adapter lever 46

[0153] In the transmission mechanism 40, the conversion rod 46 includes a conversion rod end 46A and a conversion rod end 46B located on the opposite side of the conversion rod end 46A. Additionally, the conversion rod 46 includes a conversion rod fulcrum portion 46C located between the conversion rod end 46A and the conversion rod end 46B. The conversion rod end 46B is housed inside the support cylinder 201.

[0154] [A-7] Connections at each end

[0155] One end 41A of the reversing lever is rotatably connected to the opposite contact portion 205 via the support member 202. Here, one end 41A of the reversing lever is rotatably connected to the end of the support rod portion 222 constituting the support member 202 located on the opposite side relative to the operating mechanism 30 side.

[0156] Furthermore, the other end 41B of the reversing lever is rotatably connected to one end 45A of the connecting rod, and the other end 45B of the connecting rod is rotatably connected to the pivot point 46C of the conversion lever. In addition, the other end 46B of the conversion lever is rotatably connected to the other end 42B of the connecting rod.

[0157] Furthermore, the other end 42B of the connecting rod is rotatably connected to the movable contact portion 105 via the connecting member 401. Here, the other end 42B of the connecting rod is rotatably connected to the end of the connecting member 401 located on the opposite side to the operating mechanism 30 side.

[0158] One end 46A of the conversion rod is rotatably connected to the sealed container 1 in the space located outside the support cylinder 201 inside the sealed container 1.

[0159] One end 43A of the fulcrum rod is rotatably connected to the support cylinder 201. The other end 43B of the fulcrum rod is rotatably connected to the fulcrum part 41C of the reversing rod.

[0160] One end 41A of the reversing rod, the other end 41B of the reversing rod, one end 42A of the connecting rod, the other end 42B of the connecting rod, one end 43A of the fulcrum rod, the other end 43B of the fulcrum rod, one end 45A of the connecting rod, the other end 45B of the connecting rod, one end 46A of the conversion rod, and the other end 46B of the conversion rod are respectively configured to rotate around a direction orthogonal to the axial direction (direction y in the figure) as the axis of rotation.

[0161] [B] Operation of the opening and closing device

[0162] The operation of the opening and closing device in this embodiment will be explained in detail.

[0163] [B-1] Closing action (connecting action)

[0164] First, let's explain the closing action (connecting action).

[0165] After the closing action is performed in the opening and closing device of this embodiment, as follows: Figure 2A As already shown, this is in contrast to the case of the first embodiment (see reference). Figure 1A Similarly, the opening and closing device becomes closed (energized). That is, the movable side arc contact 11 and the opposite side arc contact 21 are in contact, and the movable side energized contact 12 and the opposite side energized contact 22 are in contact. As a result, in the opening and closing device, the support cylinder 201, the opposite side energized contact 22, the movable side energized contact 12, and the cylinder 102 are electrically connected, and current flows.

[0166] [B-2] Opening action (cutting off action)

[0167] Next, the opening action (cut-off action) will be explained.

[0168] Figure 2B and Figure 2C This is a cross-sectional view schematically illustrating the situation when an opening action (cut-off action) is performed in the opening and closing device of the second embodiment. Figure 2B In, with Figure 1B Similarly, the case of a cutting-off process occurring midway through the execution of an opening action (cut-off action) to reach an open state (cut-off state) is shown. Figure 2C In, with Figure 1CSimilarly, the situation after the execution of the opening action (cut-off action) is completed and the state becomes open (cut-off) is shown.

[0169] like Figure 2B and Figure 2C As shown, when the opening and closing device in this embodiment performs an opening operation, changing the device from a closed state (energized state) to an open state (disconnected state), similar to the case in the first embodiment, the movable-side energized contact 12 and the opposing-side energized contact 22 change from a contact state to a separated state. Afterwards, the movable-side arc contact 11 and the opposing-side arc contact 21 change from a contact state to a separated state.

[0170] In the opening and closing device of this embodiment, the transmission mechanism 40 is the same as in the first embodiment, transmitting the driving force of the operating mechanism 30 to the opposing contact member 205 via the movable side contact member 105. Therefore, in this embodiment, when the opening action is performed, the movable side contact member 105 moves axially toward the operating mechanism 30 side (right side in the figure), and the opposing side contact member 205 moves axially toward the side opposite to the operating mechanism 30 side (left side in the figure).

[0171] [B-2-1] Operation of connecting component 401

[0172] In the transmission mechanism 40, as the movable side contact part 105 moves, the connecting part 401 moves axially toward the operating mechanism 30, and the other end 42B of the connecting rod 42 connected to the connecting part 401 also moves axially toward the operating mechanism 30.

[0173] [B-2-2] Action of Reverse lever 41

[0174] In the transmission mechanism 40 of this embodiment, the reversing lever 41 is driven in conjunction with the connecting lever 45 and the conversion lever 46, in addition to the connecting lever 42. Here, the reversing lever 41 moves clockwise around the part where the other end 42B of the connecting lever is rotatably connected to the fulcrum portion 41C of the reversing lever, as the center of rotation. As a result, the other end 41B of the reversing lever 41 moves toward the operating mechanism 30, and one end 41A of the reversing lever moves toward the side opposite to the operating mechanism 30.

[0175] As one end 41A of the reversing lever moves, the support member 202 moves axially to the side opposite to the operating mechanism 30. Consequently, the opposing contact portion 205 supported on the support member 202 also moves axially to the side opposite to the operating mechanism 30. That is, axially, the opposing contact portion 205 moves to the side opposite to the movable contact portion 105.

[0176] [B-2-3] Action of connecting link 42

[0177] In the transmission mechanism 40, as the connecting member 401 moves, the connecting rod 42 rotates about the part of the connecting rod 42B that is rotatably connected to the support member 202 as the rotation center axis.

[0178] Here, the connecting rod 42 first rotates counterclockwise about the part of the connecting rod 42B that is rotatably connected to the support 202, with the part being the axis of rotation. As a result, in the connecting rod 42, one end 42A moves axially toward the operating mechanism 30 and radially from the inside to the outside (see reference). Figure 2A and Figure 2B ).

[0179] Then, the connecting rod 42 rotates clockwise about the portion of the connecting rod 42B that is rotatably connected to the support 202, with the portion as the axis of rotation. As a result, one end 42A of the connecting rod 42 moves axially toward the operating mechanism 30 and radially from the outside to the inside (see reference). Figure 2B and Figure 2C ).

[0180] [B-2-4] Movement of pivot rod 43

[0181] In the transmission mechanism 40, as the connecting component 401 moves, the fulcrum rod 43 rotates around the part of the fulcrum rod 43A that is rotatably connected to the support cylinder 201 as the rotation center axis.

[0182] Here, the fulcrum rod 43 first rotates counterclockwise around the part of the fulcrum rod 43A that is rotatably connected to the support cylinder 201 as the axis of rotation. Consequently, the other end 43B of the fulcrum rod 43 moves radially from the inside to the outside (see reference). Figure 2A and Figure 2B ).

[0183] Then, the fulcrum rod 43 rotates clockwise about the part of the fulcrum rod 43A that is rotatably connected to the support cylinder 201. As a result, the other end 43B of the fulcrum rod 43 moves radially from the outside to the inside (see reference). Figure 2B and Figure 2C ).

[0184] [B-2-5] Action of connecting link 45 (second connecting link)

[0185] In the transmission mechanism 40, as the connecting member 401 moves, the connecting link 45 (second connecting link) rotates about the part of the connecting link 45A that is rotatably connected to the reversing link 41 as the rotation center axis.

[0186] Here, the connecting rod 45 first rotates counterclockwise about the part of the connecting rod 45A that is rotatably connected to the reversing rod 41. Consequently, the other end 45B of the connecting rod 45 moves axially toward the operating mechanism 30 and radially from the outside to the inside (see reference). Figure 2A and Figure 2B ).

[0187] Subsequently, the connecting rod 45 rotates clockwise around the portion of the connecting rod 45A that is rotatably connected to the reversing rod 41. As a result, the other end 45B of the connecting rod 45 moves axially toward the operating mechanism 30 and radially from the inside to the outside (see reference). Figure 2B and Figure 2C ).

[0188] [B-2-6] Operation of shift lever 46

[0189] In the transmission mechanism 40, as the connecting component 401 moves, the conversion rod 46 rotates around the part of the conversion rod 46A that is rotatably connected to the sealed container 1 as the rotation center axis.

[0190] Here, the conversion rod 46 rotates counterclockwise around the portion of the conversion rod 46A that is rotatably connected to the sealed container 1. Consequently, the other end 46B and the fulcrum 46C of the conversion rod move axially toward the operating mechanism 30 and radially (see reference). Figures 2A to 2C ).

[0191] [C] Summary

[0192] As described above, the opening and closing device in this embodiment is the same as in the first embodiment, with the transmission mechanism 40 provided such that the driving force of the operating mechanism 30 is transmitted to the opposing contact member 205 via the movable side contact member 105. The transmission mechanism 40 transmits the driving force of the operating mechanism 30 to the opposing side contact member 205 such that the moving direction of the opposing side contact member 205 is opposite to the moving direction of the movable side contact member 105. Therefore, in this embodiment, even when the driving force of the operating mechanism 30 is relatively low, the relative moving speed of the movable side contact member 105 relative to the opposing side contact member 205 can be increased.

[0193] In the opening and closing device of this embodiment, as described above, the transmission mechanism 40 includes a reversing rod 41, a connecting rod 42, a fulcrum rod 43, a connecting rod 45, and a switching rod 46. The reversing rod 41 includes a reversing rod end 41A, a reversing rod end 41B located opposite to the reversing rod end 41A, and a reversing rod fulcrum portion 41C located between the reversing rod end 41A and the reversing rod end 41B. The connecting rod 42 includes a connecting rod end 42A and a connecting rod end 42B located opposite to the connecting rod end 42A. The fulcrum rod 43 includes a fulcrum rod end 43A and a fulcrum rod end 43B located opposite to the fulcrum rod end 43A. The connecting rod 45 includes a connecting rod end 45A and a connecting rod end 45B located opposite to the connecting rod end 45A. The conversion lever 46 includes a conversion lever end 46A, a conversion lever other end 46B located on the opposite side of the conversion lever end 46A, and a conversion lever fulcrum portion 46C located between the conversion lever end 46A and the conversion lever other end 46B. The reversing lever end 41A is rotatably connected to the opposing contact portion 205 via a support member 202, and the reversing lever other end 41B is rotatably connected to the connecting rod end 45A. The connecting rod other end 45B is rotatably connected to the conversion lever fulcrum portion 46C, and the conversion lever other end 46B is rotatably connected to the connecting rod other end 42B. The connecting rod other end 42B is rotatably connected to the movable contact portion 105 via a connecting member 401. The conversion lever end 46A is rotatably connected to the sealed container 1. One end 43A of the fulcrum rod is rotatably connected to the sealed container 1 via the support cylinder 201. The other end 43B of the fulcrum rod is rotatably connected to the fulcrum part 41C of the reversing rod.

[0194] The transmission mechanism 40 in this embodiment is the same as in the first embodiment, including a fulcrum rod 43. One end 43A of the fulcrum rod is rotatably connected to the sealed container 1 via the support cylinder 201, and the other end 43B of the fulcrum rod is rotatably connected to the reverse rod fulcrum portion 41C of the reverse rod 41. Therefore, in this embodiment, the force acting on the movable side contact member 105 and the sliding portion of the opposite side contact member 205 in the component of the direction orthogonal to the moving direction of the opposite side contact member 205 is also reduced.

[0195] Therefore, in the opening and closing device of this embodiment, it is possible to prevent the increase of friction in the sliding part, thus making it easy to achieve high-speed operation.

[0196] Furthermore, in the opening and closing device of this embodiment, the various parts of the transmission mechanism 40 are configured as described above, thus making the radial length (diameter) of the sealed container 1 shorter than that of the first embodiment. As a result, the opening and closing device of this embodiment can be miniaturized compared to the first embodiment, and the capacity of the arc-quenching gas sealed in the sealed container 1 can be reduced.

[0197] <Other>

[0198] Several embodiments of the present invention have been described, but these embodiments are given by way of example and are not intended to limit the scope of the invention. These embodiments can be implemented in various other ways, and various omissions, substitutions, and modifications can be made without departing from the spirit of the invention. These embodiments or variations thereof are included in the scope or spirit of the invention, and are included within the scope of the invention described in the patent claims and their equivalents.

[0199] For example, the above embodiment illustrates a case where the switching device is a compressed air circuit breaker, but it is not limited to this. The transmission mechanism described above can also be used in switching devices other than compressed air circuit breakers.

Claims

1. An opening and closing device that performs a closing action to change a circuit from an open state to a closed state, and an opening action to change the circuit from a closed state to an open state, characterized in that it comprises: Sealed container; The first contact part is housed inside the sealed container; The second contact part is arranged opposite to the first contact part inside the sealed container; An operating mechanism drives the first contact portion such that when the closing action is performed, the first contact portion approaches the second contact portion, and when the opening action is performed, the first contact portion separates from the second contact portion; as well as A transmission mechanism that transmits the driving force of the operating mechanism to the second contact portion via the first contact portion, such that when the closing action is performed, the second contact portion approaches the first contact portion, and when the opening action is performed, the second contact portion separates from the first contact portion; The transmission mechanism has: A reversing lever includes one end of the reversing lever, another end of the reversing lever located on the opposite side of the one end of the reversing lever, and a reversing lever fulcrum located between the one end of the reversing lever and the other end of the reversing lever; A connecting link, comprising one end of the connecting link and another end of the connecting link located on the opposite side of the first end of the connecting link; and A fulcrum rod, comprising one end of the fulcrum rod and another end of the fulcrum rod located on the opposite side of the one end of the fulcrum rod; One end of the reversing lever is rotatably connected to the second contact part. The other end of the reversing lever is rotatably connected to one end of the connecting lever. The other end of the connecting rod is rotatably connected to the first contact part. One end of the fulcrum rod is rotatably connected to the sealed container. The other end of the fulcrum rod is rotatably connected to the fulcrum of the reversing rod.

2. An opening and closing device that performs a closing action to change a circuit from an open state to a closed state, and an opening action to change the circuit from a closed state to an open state, characterized in that it has: Sealed container; The first contact part is housed inside the sealed container; The second contact part is arranged opposite to the first contact part inside the sealed container; An operating mechanism that drives the first contact portion such that, during the closing action, the first contact portion approaches the second contact portion, and during the opening action, the first contact portion disengages from the second contact portion; and A transmission mechanism transmits the driving force of the operating mechanism to the second contact portion via the first contact portion, such that when the closing action is performed, the second contact portion approaches the first contact portion, and when the opening action is performed, the second contact portion separates from the first contact portion. The transmission mechanism has the following features: A reversing lever includes one end of the reversing lever, another end of the reversing lever located on the opposite side of the one end of the reversing lever, and a reversing lever fulcrum located between the one end of the reversing lever and the other end of the reversing lever; The first connecting link includes one end of the first connecting link and another end of the first connecting link located on the opposite side of the first connecting link end; A fulcrum rod, comprising one end of the fulcrum rod and another end of the fulcrum rod located on the opposite side of the one end of the fulcrum rod; The second connecting link includes one end of the second connecting link and another end of the second connecting link located on the opposite side of the first end of the second connecting link; and A conversion lever includes one end of the conversion lever, another end of the conversion lever located on the opposite side of the one end of the conversion lever, and a conversion lever fulcrum located between the one end of the conversion lever and the other end of the conversion lever; One end of the reversing lever is rotatably connected to the second contact part. The other end of the reversing lever is rotatably connected to one end of the second connecting lever. The other end of the second connecting rod is rotatably connected to the pivot point of the conversion rod. The other end of the conversion rod is rotatably connected to the other end of the first connecting rod. The other end of the first connecting rod is rotatably connected to the first contact part. One end of the conversion rod is rotatably connected to the sealed container. One end of the fulcrum rod is rotatably connected to the sealed container. The other end of the fulcrum rod is rotatably connected to the fulcrum of the reversing rod.

Images