A switching device

Abstract

The utility model relates to low voltage electrical apparatus technical field especially relates to a switch device. The switch device includes main switch module, precharge module and linkage module, wherein: main switch module includes first open and close handle, precharge module includes second open and close handle and precharge resistance, and precharge resistance is provided in parallel with main switch module, linkage module is connected between first open and close handle and second open and close handle, and linkage module is configured as control precharge module switches from closing state to open state in the process that main switch module switches from open state to closing or tripping state, and is also configured as control precharge module switches from open state to closing state in the process that main switch module switches from closing or tripping state to open state. Through linkage module makes first open and close handle can drive precharge module and open and close, thereby making precharge group can be according to the working condition of main switch module in time on and off.

Description

Technical Field

[0001] This utility model relates to the field of low-voltage electrical technology, and in particular to a switching device. Background Technology

[0002] For existing switching devices, before closing the circuit, there may be loads such as large capacitors connected in the switching circuit. Therefore, there is a high voltage difference between the input and output terminals of the switching device. If the circuit is closed directly, a large inrush current will occur, which will cause damage to the switch and system safety accidents.

[0003] To address the issue of high inrush current during switching operations, some switches have incorporated a pre-charge circuit. This circuit balances the voltage difference between the input and output terminals of the main switch when the switch is open. When the main switch closes, the pre-charge circuit must be disconnected. Currently, the connection and disconnection of the pre-charge circuit are either manual or automatically controlled by a host computer according to a pre-set program. Manual control increases the workload for operators and is prone to delays. Remote control via a host computer suffers from delayed response and errors in circuit identification, leading to incorrect control of the pre-charge circuit.

[0004] Therefore, how to achieve timely connection and disconnection of the precharge circuit has become a technical problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0005] The purpose of this invention is to provide a switching device to solve the technical problem that existing switching devices with precharge circuits cannot connect and disconnect the precharge circuit in a timely manner.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: A switching device includes a main switch module, a precharge module, and a linkage module, wherein: The main switch module includes a first opening / closing handle; The pre-charge module includes a second opening and closing handle and a pre-charge resistor, wherein the pre-charge resistor is connected in parallel with the main switch module; The linkage module is connected between the first opening / closing handle and the second opening / closing handle. The linkage module is configured to control the pre-charge module to switch from the closed state to the open state when the main switch module switches from the open state to the closed or tripped state. It is also configured to control the pre-charge module to switch from the open state to the closed state when the main switch module switches from the closed or tripped state to the open state.

[0007] In some embodiments, the linkage module includes a first link and a second link. The first link has a first end and a second end, and the second link has a third end and a fourth end. The second end of the first link and the third end of the second link are hinged together. The first end of the first link is hinged to the first opening and closing handle, and the fourth end of the second link is hinged to the second opening and closing handle.

[0008] In some embodiments, the first opening and closing handle is provided with a first sliding hole in the shape of an elongated hole, and the first end of the first connecting rod is slidably connected to the first sliding hole along the length direction of the first sliding hole. Alternatively, one of the second end of the first connecting rod and the third end of the second connecting rod is provided with a first connecting boss, and the other is provided with a second sliding hole, and the second sliding hole is slidably fitted onto the first connecting boss along the length direction of the first connecting boss; The movement trajectory of the first opening and closing handle is an arc, the line connecting the highest point of the arc and the center of the arc is a reference line, and the length direction of the first sliding hole and the length direction of the first connecting boss are parallel to the plane where the arc is located and are parallel to the reference line or have an acute angle between them.

[0009] In some embodiments, one of the second end of the first connecting rod and the third end of the second connecting rod is provided with a first connecting boss, and the other is provided with a second sliding hole in the shape of an elongated hole, and the first connecting boss is slidably disposed in the second sliding hole along the length direction of the second sliding hole.

[0010] In some embodiments, the linkage module further includes a follower, which is connected to the second opening and closing handle and hinged to the fourth end of the second connecting rod.

[0011] In some embodiments, the driven member is provided with an irregularly shaped sliding hole, and the fourth end of the second connecting rod is provided with a second connecting boss, which is slidably disposed in the irregularly shaped sliding hole along the extending direction of the irregularly shaped sliding hole.

[0012] In some embodiments, the linkage module further includes a rotating shaft, and the relative positions of the rotating shaft, the main switch body of the main switch module, and the precharge body of the precharge module are fixedly arranged, with the middle position of the second connecting rod rotatably mounted on the rotating shaft around the rotating shaft.

[0013] In some embodiments, the irregular sliding hole includes a circular arc segment and a straight segment connected together, the circular arc segment having the axis of the rotating shaft as its arc center, and the straight segment extending in a direction perpendicular to the plane containing the movement trajectory of the first opening and closing handle.

[0014] In some embodiments, the linkage module further includes a guide rod, the guide rod, the main switch body of the main switch module and the precharge body of the precharge module are fixedly positioned relative to each other, and the driven member is slidably disposed on the guide rod along the length direction of the guide rod.

[0015] In some embodiments, a linkage groove is provided on the side of the driven member near the precharge module, and the linkage groove is fitted onto the second opening and closing handle.

[0016] The beneficial effects of this utility model are: The switching device provided by this utility model includes a main switch module, a pre-charge module, and a linkage module, wherein: the main switch module includes a first opening and closing handle; the pre-charge module includes a second opening and closing handle and a pre-charge resistor, the pre-charge resistor being connected in parallel with the main switch module; the linkage module is connected between the first opening and closing handle and the second opening and closing handle, and the linkage module is configured to control the pre-charge module to switch from the closed state to the open state when the main switch module switches from the open state to the closed or tripped state, and is also configured to control the pre-charge module to switch from the open state to the closed state when the main switch module switches from the closed or tripped state to the open state.

[0017] The switching device uses a linkage module to enable the first opening and closing handle to drive the second opening and closing handle, thereby controlling the pre-charge module to open and close, so that the pre-charge module can be connected and disconnected in a timely manner according to the working status of the main switch module. Attached Figure Description

[0018] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0019] Figure 1 This is a three-dimensional schematic diagram of the switching device provided in Embodiment 1 of this utility model; Figure 2 A simplified structural diagram of the switching device provided in Embodiment 1 of this utility model when the main switch module is in the open state; Figure 3 A simplified structural diagram of the switching device provided in Embodiment 1 of this utility model when the main switch module is in the closed state; Figure 4 for Figure 1 Enlarged view of point A in the middle; Figure 5 This is a schematic diagram of the movement of the first opening and closing handle provided in Embodiment 1 of the present utility model; Figure 6 This is a front view of the switching device provided in Embodiment 1 of the present invention when the main switch module is in the tripped state; Figure 7 A schematic diagram showing the positions of the irregular sliding hole, rotating shaft, and second connecting boss provided in Embodiment 1 of this utility model; Figure 8 This is a front view of the switching device provided in Embodiment 1 of the present invention when the main switch module is in the open state; Figure 9 This is a front view of the switching device provided in Embodiment 1 of the present invention when the main switch module is in the closed state; Figure 10 This is a front view of the switching device provided in Embodiment 2 of this utility model; Figure 11 A three-dimensional schematic diagram of the linkage module provided in Embodiment 3 of this utility model; Figure 12 This is a cross-sectional schematic diagram of the linkage module provided in Embodiment 4 of this utility model.

[0020] icon: 1-Main switch module; 11-First opening / closing handle; 12-Main switch body; 2-Pre-charge module; 21-Second opening and closing handle; 22-Pre-charge resistor; 23-Pre-charge main body; 3-Linkage module; 31-First link; 32-Second link; 33-First sliding hole; 34-First connecting boss; 35-Second sliding hole; 36-Follower; 361-Linkage groove; 37-Irregularly shaped sliding hole; 371-Arc segment; 372-Straight segment; 38-Second connecting boss; 39-Rotating shaft; 310-Guide rod; 311-Fixed bracket; 3111-Mounting hole; I-Reference Line. Detailed Implementation

[0021] The technical solution of this utility model will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0022] It should be noted that in the description of this utility model, the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used solely for the convenience of describing this utility model and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0023] It should be noted that in the description of this utility model, the terms "connection" and "installation" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or a connection through an intermediate medium; they can refer to a mechanical connection or an electrical connection. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0024] Example 1 For switches equipped with a pre-charge circuit, the pre-charge circuit needs to be disconnected when the main switch is closed. Currently, the connection and disconnection of the pre-charge circuit are either done manually or automatically controlled by a host computer according to a pre-set program. Manual control of the pre-charge circuit increases the workload of staff and is prone to delays. Remote control of the pre-charge circuit by a host computer suffers from delayed response and errors in identification, leading to incorrect control of the pre-charge circuit.

[0025] Based on this, this application provides a switching device, referring to... Figures 1 to 3 The switching device includes a main switch module 1, a precharge module 2, and a linkage module 3, wherein: The main switch module 1 includes a first opening / closing handle 11; The pre-charge module 2 includes a second opening and closing handle 21 and a pre-charge resistor 22, which is connected in parallel with the main switch module 1; The linkage module 3 is connected between the first opening and closing handle 11 and the second opening and closing handle 21. The linkage module 3 is configured to control the pre-charge module 2 to switch from the closing state to the opening state when the main switch module 1 switches from the opening state to the closing or tripping state. It is also configured to control the pre-charge module 2 to switch from the opening state to the closing state when the main switch module 1 switches from the closing or tripping state to the opening state.

[0026] It should be noted that the main switch module 1 has an open state, a tripped state, and a closed state. In each state, the first opening / closing handle 11 is in the first open position, the tripped position, and the first closed position, respectively. The precharge module 2 has an open state and a closed state. In these two states, the second opening / closing handle 21 is in the second open position and the second closed position, respectively. When the operating state of the main switch module 1 changes, the position of the first opening / closing handle 11 also changes. Simultaneously, the first opening / closing handle 11 drives the second opening / closing handle 21 to move through the linkage module 3, thereby controlling the operating state of the precharge module 2 to change accordingly.

[0027] like Figure 2 As shown, during the process of switching the main switch module 1 from the closed or tripped state to the open state, the first opening / closing handle 11 drives the pre-charge module 2 to switch from the open state to the closed state through the linkage module 3; when the main switch module 1 is in the open state, the pre-charge module 2 is in the closed state, and the pre-charge resistor 22 is connected in series in the main circuit to balance the voltage difference across the main switch module 1. Figure 3 As shown, during the process of the main switch module 1 switching from the open state to the closed state, the first opening / closing handle 11 drives the precharge module 2 to switch from the closed state to the open state through the linkage module 3. When the main switch module 1 is in the closed state, the precharge module 2 is in the open state, thereby disconnecting the circuit where the precharge resistor 22 is located.

[0028] In summary, the switching device provided in this application adds a linkage module 3 between the first opening / closing handle 11 of the main switch module 1 and the second opening / closing handle 21 of the pre-charge module 2. The linkage module 3 enables the first opening / closing handle 11 to drive the pre-charge module 2 to open and close, thus allowing the pre-charge module 2 to be connected and disconnected promptly according to the operating state of the main switch module 1. This ensures, on the one hand, that the pre-charge module 2 can effectively balance the voltage difference across the main switch module 1, avoiding damage to the switch and system safety accidents caused by large inrush currents when the main switch module 1 is closed; on the other hand, it ensures that the pre-charge module 2 can be disconnected promptly after the main switch module 1 is closed.

[0029] In this embodiment, the switching device is specifically a molded case circuit breaker.

[0030] Continue to refer to Figure 1In this embodiment, the main switch module 1 includes a main switch body 12, a contact system disposed within the main switch body 12, and a first opening / closing handle 11. The first opening / closing handle 11 is rotatably disposed on the main switch body 12 and is connected to the contact system via a transmission connection. By moving the first opening / closing handle 11, the connection and disconnection of the contact system can be controlled. The precharge module 2 includes a precharge body 23, a precharge resistor 22 disposed within the precharge body 23, and a second opening / closing handle 21. The second opening / closing handle 21 is slidably disposed on the precharge body 23. By moving the second opening / closing handle 21, the connection and disconnection of the circuit containing the precharge resistor 22 can be controlled.

[0031] Furthermore, referring to Figure 4 The linkage module 3 includes a first link 31 and a second link 32. The first link 31 has a first end and a second end, and the second link 32 has a third end and a fourth end. The second end of the first link 31 and the third end of the second link 32 are hinged together. The first end of the first link 31 is hinged to the first opening / closing handle 11, and the fourth end of the second link 32 is hinged to the second opening / closing handle 21. The linkage between the first opening / closing handle 11 and the second opening / closing handle 21 is achieved through the two links.

[0032] In this embodiment, refer to Figure 4 and Figure 5 The first opening and closing handle 11 is provided with a first sliding hole 33 in the shape of an elongated hole. The first end of the first connecting rod 31 is slidably connected to the first sliding hole 33 along the length direction of the first sliding hole 33. The movement trajectory of the first opening and closing handle 11 is an arc. The line connecting the highest point of the arc and the center of the arc is the reference line I. The length direction of the first sliding hole 33 is parallel to the plane where the arc is located and is parallel to the reference line I or has an angle α with an acute angle.

[0033] Specifically, the plane containing the movement trajectory (arc) of the first opening / closing handle 11 is perpendicular to the horizontal plane, while the horizontal degrees of freedom of the first connecting rod 31 and the second connecting rod 32 are both restricted. Therefore, it is necessary to allow the first opening / closing handle 11 and the first connecting rod 31 to have relative movement in the horizontal direction to prevent jamming between them. To prevent jamming, the first opening / closing handle 11 is provided with a first sliding hole 33 in the shape of an elongated hole. The first end of the first connecting rod 31 is slidably disposed within the first sliding hole 33. During the rotation of the first opening / closing handle 11, the first connecting rod 31 can both slide within the first sliding hole 33 and rotate relative to the first opening / closing handle 11 within the first sliding hole 33, thereby enabling the first opening / closing handle 11 to drive the movement of the first and second connecting rods.

[0034] Continue to refer to Figure 4In this embodiment, the first sliding hole 33 is a T-shaped hole, and an annular boss is provided around the first end of the first connecting rod 31, which is engaged in the first sliding hole 33. This arrangement prevents the first end of the first connecting rod 31 from coming out of the first sliding hole 33.

[0035] Optionally, the first sliding hole 33 can be directly machined on the first opening and closing handle 11. Alternatively, the linkage module 3 includes a connecting block, which is fixed to the first opening and closing handle 11 by means of screw connection, snap-fit, or other connection methods, and the connecting block is machined with the first sliding hole 33.

[0036] Continue to refer to Figure 4 In some embodiments, one of the second end of the first connecting rod 31 and the third end of the second connecting rod 32 is provided with a first connecting boss 34, and the other is provided with a second sliding hole 35 in the shape of an elongated hole. The first connecting boss 34 is slidably disposed within the second sliding hole 35 along the length direction of the second sliding hole 35. The second sliding hole 35 not only realizes the hinged engagement of the first connecting rod 31 and the second connecting rod 32, but also provides a margin for relative movement of the first connecting rod 31 and the second connecting rod 32 to prevent the first connecting rod 31 and the second connecting rod 32 from jamming.

[0037] Reference Figure 6 , Figure 6 In the indicated orientation, the plane containing the movement trajectory of the first opening / closing handle 11 is perpendicular to the paper and is in a vertical position. The length direction of the second sliding hole 35 forms an angle b with the plane containing the movement trajectory of the first opening / closing handle 11 (i.e., they are not parallel). This arrangement allows for relative movement between the second end of the first connecting rod 31 and the third end of the second connecting rod 32.

[0038] In this embodiment, a first connecting boss 34 is provided at the second end of the first connecting rod 31, and a second sliding hole 35 is provided at the third end of the second connecting rod 32. One end of the first connecting boss 34 is fixed to the second end of the first connecting rod 31, and the other end passes through the second sliding hole 35 and is locked by fasteners (such as nuts, cotter pins, shaft stops, etc.) to prevent the first connecting boss 34 from falling out of the second sliding hole 35. Of course, in other embodiments, the first connecting boss 34 can be provided at the third end of the second connecting rod 32, and the second sliding hole 35 can be provided at the second end of the first connecting rod 31. The transmission principle of the above two technical solutions is the same, and both are to make the second end of the first connecting rod 31 and the third end of the second connecting rod 32 hinged and have relative mobility.

[0039] In some embodiments, continue to refer to Figure 6 The linkage module 3 also includes a follower 36, which is connected to the second opening / closing handle 21 and hinged to the fourth end of the second connecting rod 32. In some other embodiments, the fourth end of the second connecting rod 32 may also be directly connected to the second opening / closing handle 21.

[0040] Based on the above structure, the driven member 36 is provided with a shaped sliding hole 37, and the fourth end of the second connecting rod 32 is provided with a second connecting boss 38. The second connecting boss 38 is slidably disposed in the shaped sliding hole 37 along the extending direction of the shaped sliding hole 37. The shaped sliding hole 37 enables the driven member 36 to move along a predetermined trajectory under the drive of the second connecting rod 32, thereby driving the second opening and closing handle 21 to move.

[0041] Furthermore, the linkage module 3 also includes a rotating shaft 39. The relative positions of the rotating shaft 39, the main switch body 12 of the main switch module 1, and the pre-charge body 23 of the pre-charge module 2 are fixed. The middle position of the second link 32 is rotated around the rotating shaft 39 and fitted onto the rotating shaft 39. The purpose of setting the rotating shaft 39 is to restrict the degree of freedom of the second link 32, so that the second link 32 only has one degree of freedom: rotation around the rotating shaft 39.

[0042] Optionally, the rotating shaft 39 is mounted on the main switch body 12; or, the rotating shaft 39 is mounted on the pre-charge body 23; or, the rotating shaft 39 is mounted in the installation area of ​​the switch device. All three mounting methods of the rotating shaft 39 can achieve the purpose of fixing the relative positions of the rotating shaft 39, the main switch body 12, and the pre-charge body 23.

[0043] Reference Figure 7 The irregularly shaped sliding hole 37 includes a circular arc segment 371 and a straight segment 372 connected together. The circular arc segment 371 has its arc center around the axis of the rotating shaft 39, and the extension direction of the straight segment 372 is perpendicular to the plane of the movement trajectory of the first opening and closing handle 11. The size of the circular arc segment 371 corresponds to the size of the movement trajectory of the first opening and closing handle 11 between the first closed position and the first tripped position, and the size of the straight segment 372 corresponds to the size of the movement trajectory of the first opening and closing handle 11 between the tripped position and the first open position.

[0044] Using the above technical solution, when the first opening / closing handle 11 moves between the first closed position and the tripped position, the second connecting boss 38 slides within the arc segment 371. At this time, the second opening / closing handle 21 remains stationary and is always in the second open position. When the first opening / closing handle 11 moves between the first open position and the tripped position, the second connecting boss 38 slides within the straight segment 372. At this time, the second opening / closing handle 21 moves between the second closed position and the second open position.

[0045] Reference Figure 8In some embodiments, to limit the movement trajectory of the driven member 36, the linkage module 3 further includes a guide rod 310. The guide rod 310, the main switch body 12 of the main switch module 1, and the precharge body 23 of the precharge module 2 are fixedly positioned relative to each other. The driven member 36 is slidably mounted on the guide rod 310 along its length. There can be one or more guide rods 310. In this embodiment, there are two guide rods 310. The driven member 36 has a guide hole corresponding to the position of each guide rod 310, and the guide hole is slidably fitted onto the corresponding guide rod 310.

[0046] Optionally, the guide rod 310 is mounted on the main switch body 12; or, the guide rod 310 is mounted on the pre-charge body 23; or, the guide rod 310 is mounted in the installation area of ​​the switch device. All three mounting methods of the guide rod 310 can achieve the purpose of fixing the relative positions of the guide rod 310, the main switch body 12, and the pre-charge body 23.

[0047] In some embodiments, a linkage groove 361 is provided on the side of the driven member 36 near the pre-charge module 2, and the linkage groove 361 is fitted onto the second opening and closing handle 21. The advantages of the above configuration are: firstly, it eliminates the need for a connection structure on the second opening and closing handle 21 to connect the driven member 36, making the installation process of the linkage module 3 quicker; secondly, the linkage groove 361 can reserve a small amount of slack for the movement of the second opening and closing handle 21, making the transmission process more reliable and preventing jamming.

[0048] In this embodiment, each sliding hole can be a through hole or a blind hole. Whether it is a through hole or a blind hole, it serves to connect, guide, and provide a margin for movement. Therefore, changes in the type of sliding hole are also within the scope of protection of this application.

[0049] For most switches, the switch can directly switch from the closed state to the open state, from the closed state to the tripped state, from the tripped state to the open state, and from the open state to the closed state, but it cannot directly switch from the open state to the tripped state. However, for some switches, the switch can also directly switch from the open state to the tripped state (commonly known as a small jump). Because the switchgear provided in this application adopts the above-mentioned technical solution, the main switch module 1 can be either of the above two types of switches.

[0050] In summary, the working principle of the switching device provided in this embodiment is as follows: Figure 6 This is a front view of the switching device when the main switch module 1 is in the tripped state. Figure 8 This is a front view of the switching device when the main switch module 1 is in the open state (also the tripped state). Figure 9The main view of the switching device when the main switch module 1 is in the closed state; Reference Figure 6 and Figure 7 When the main switch module 1 is in the tripped state, the precharge module 2 is in the open state. Correspondingly, the first opening and closing handle 11 is in the tripped position, the second opening and closing handle 21 is in the second open position, and the precharge circuit is in the disconnected state. At this time, the second connecting boss 38 is located at the junction of the arc section 371 and the straight section 372 of the irregular sliding hole 37. Reference Figure 7 and Figure 8 During the process of moving the first opening and closing handle 11 downward from the tripped position to the first open position (i.e., the latched position), the second connecting boss 38 slides within the straight section 372, and the second connecting boss 38 drives the driven member 36 and the second opening and closing handle 21 to slide upward; when the first opening and closing handle 11 moves to the first open position, the second opening and closing handle 21 is just in the second closed position. At this time, the main switch module 1 is in the open state (i.e., the latched state), the precharge module 2 is in the closed state, and the precharge circuit is in the connected state.

[0051] Reference Figures 7 to 9 During the upward movement of the first opening / closing handle 11 from the first open position to the first closed position, the second connecting boss 38 slides from the straight section 372 to the arc section 371. When the first opening / closing handle 11 moves from the first open position to the tripped position, the second connecting boss 38 slides within the straight section 372, causing the driven member 36 and the second opening / closing handle 21 to slide downwards. When the first opening / closing handle 11 is in the tripped position, the second connecting boss 38 is located at the junction of the arc section 371 and the straight section 372, and the second opening / closing handle 21 is exactly in the second open position. At this time, the main switch module 1 is in the intermediate state between open and closed, the precharge module 2 is in the open state, and the precharge circuit is in the disconnected state. When the first opening and closing handle 11 continues to move from the tripped position to the first closing position, the second connecting boss 38 slides within the arc segment 371. Since the center of the arc segment 371 coincides with the rotation center of the second opening and closing handle 21, the follower 36 does not move, and thus the second opening and closing handle 21 also does not move, and the precharge circuit remains in the disconnected state.

[0052] When the main switch module 1 is in the closed state, it can be opened or tripped via the first opening / closing handle 11. Figure 9The directions of movement are opposite. As the first opening / closing handle 11 is moved downwards from the first closed position to the first open position, the second connecting boss 38 slides from the arc segment 371 to the straight segment 372. When the first opening / closing handle 11 moves from the first closed position to the tripped position, the second connecting boss 38 slides within the arc segment 371, and the driven member 36 does not displace, thus the second opening / closing handle 21 also does not displace, and the precharge circuit is in the disconnected state. When the first opening / closing handle 11 continues to move from the tripped position to the first open position, the second connecting boss 38 slides within the straight segment 372, and the second connecting boss 38 drives the driven member 36 and the second opening / closing handle 21 to slide upwards. When the first opening / closing handle 11 is in the first open position, the second opening / closing handle 21 is exactly in the second closed position. At this time, the main switch module 1 is in the open state, the precharge module 2 is in the closed state, and the precharge circuit is in the connected state.

[0053] As described above, this embodiment adds a linkage module 3 between the main switch module 1 and the pre-charge module 2, so that the working state of the pre-charge module 2 switches with the working state of the main switch module 1, ensuring the timeliness of the state switching of the pre-charge module 2, thereby avoiding the problem of switch damage and system safety accidents caused by the inrush current generated when the main switch is closed. At the same time, it ensures that the circuit where the pre-charge resistor 22 is located is disconnected in time after the main switch module 1 is closed.

[0054] Example 2 This embodiment provides a specific installation method for the linkage module 3. (Refer to...) Figure 10 In this embodiment, the linkage module 3 also includes a fixed bracket 311, which is fixed to the main switch body 12 by screws. The two ends of the guide rod 310 are respectively fixed to the fixed bracket 311. The pre-charge body 23 is provided with a threaded hole, and one end of the rotating shaft 39 passes through the through hole on the second connecting rod 32 and is screwed into the threaded hole.

[0055] In other embodiments, the fixing bracket 311 can be fixed to the precharge body 23, or it can be fixed to the installation position of the switching device.

[0056] The remaining structure of this embodiment is the same as that of Embodiment 1, and will not be described again here.

[0057] Example 3 The difference between the switching device provided in this embodiment and that in embodiment two is that the installation method of the linkage module 3 is different.

[0058] Reference Figure 11In this embodiment, the linkage module 3 includes a fixed bracket 311, which includes two connecting seats and a connecting rod. The connecting rod is fixed between the two connecting seats by screws or snap-fit. The connecting seats have mounting holes 3111 for the screws to pass through. A mounting through hole is provided in the middle of the connecting rod. One end of the rotating shaft 39 passes through the mounting through hole and the through hole on the second connecting rod 32 in sequence. The end of the rotating shaft 39 that passes through the second connecting rod 32 is locked by fasteners (such as nuts, cotter pins, shaft stops, etc.) to prevent the rotating shaft 39 from falling off. Each connecting seat is provided with a insertion hole corresponding to each guide rod 310. Both ends of each guide rod 310 are inserted into the corresponding insertion hole.

[0059] The above technical solution enables the linkage module 3 to form a whole. The linkage module 3 can be fixed on the main switch body 12, or the pre-charge body 23, or the installation position of the switch device through the mounting hole 3111.

[0060] Taking the installation of the linkage module 3 on the pre-charge body 23 as an example, the pre-charge body 23 has a threaded hole or through hole corresponding to the mounting hole 3111. The installation process of the linkage module 3 is as follows: First, insert the first end of the first connecting rod 31 into the first sliding hole 33 on the first opening and closing handle 11, and put the linkage groove 361 on the second opening and closing handle 21; then, move the fixing bracket 311 up and down until the mounting hole 3111 on the fixing bracket 311 is aligned with the threaded hole or through hole reserved on the pre-charge body 23. Finally, fix the fixing bracket 311 on the pre-charge body 23 with screws, thus completing the installation of the linkage module 3.

[0061] The remaining structure of this embodiment is the same as that of Embodiment 1, and will not be described again here.

[0062] Example 4 The difference between the switching device provided in this embodiment and that in embodiment one is that: this embodiment does not provide a first sliding hole 33, and the first connecting rod 31 can only rotate relative to the first opening and closing handle 11 around a fixed center line, but cannot slide relative to the first opening and closing handle 11.

[0063] Reference Figure 12 In this embodiment, one of the second end of the first connecting rod 31 and the third end of the second connecting rod 32 is provided with a first connecting boss 34, and the other is provided with a second sliding hole 35. The second sliding hole 35 is slidably fitted onto the first connecting boss 34 along the length direction of the first connecting boss 34.

[0064] Figure 12In the illustrated embodiment, a first connecting boss 34 is provided at the second end of the first connecting rod 31, and a second sliding hole 35 is provided at the third end of the second connecting rod 32. Alternatively, the first connecting boss 34 can be provided at the third end of the second connecting rod 32, and the second sliding hole 35 can be provided at the second end of the first connecting rod 31. The transmission principle of both structures is the same.

[0065] In this embodiment, since the first connecting rod 31 and the first opening / closing handle 11 have only one degree of rotational automaticity, while the horizontal displacement of the second connecting rod 32 is restricted, it is necessary to allow for relative movement between the first connecting rod 31 and the second connecting rod 32 in the horizontal direction to prevent them from jamming. Therefore, the first connecting boss 34 in this embodiment is longer than the first connecting boss 34 in embodiment one, to allow for relative movement between the first connecting rod 31 and the second connecting rod 32 along the length of the first connecting boss 34. During the rotation of the first opening / closing handle 11, the first end of the first connecting rod 31 rotates relative to the first opening / closing handle 11 around a fixed center line. The first connecting boss 34 can slide within the second sliding hole 35 while rotating, thereby enabling the first opening / closing handle 11 to drive the first and second connecting rods to move.

[0066] The remaining structure of this embodiment is the same as that of Embodiment 1, and will not be described again here.

[0067] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A switching device, characterized in that, It includes a main switch module (1), a precharge module (2), and a linkage module (3), wherein: The main switch module (1) includes a first opening and closing handle (11); The pre-charge module (2) includes a second opening and closing handle (21) and a pre-charge resistor (22), wherein the pre-charge resistor (22) is connected in parallel with the main switch module (1); The linkage module (3) is connected between the first opening and closing handle (11) and the second opening and closing handle (21). The linkage module (3) is configured to control the pre-charge module (2) to switch from the closed state to the open state when the main switch module (1) switches from the open state to the closed or tripped state. It is also configured to control the pre-charge module (2) to switch from the open state to the closed state when the main switch module (1) switches from the closed or tripped state to the open state.

2. The switching device according to claim 1, characterized in that, The linkage module (3) includes a first link (31) and a second link (32). The first link (31) has a first end and a second end, and the second link (32) has a third end and a fourth end. The second end of the first link (31) and the third end of the second link (32) are hinged together. The first end of the first link (31) is hinged to the first opening and closing handle (11), and the fourth end of the second link (32) is hinged to the second opening and closing handle (21).

3. The switching device according to claim 2, characterized in that, The first opening and closing handle (11) is provided with a first sliding hole (33) in the shape of an elongated hole, and the first end of the first connecting rod (31) is slidably connected to the first sliding hole (33) along the length direction of the first sliding hole (33). Alternatively, one of the second end of the first connecting rod (31) and the third end of the second connecting rod (32) is provided with a first connecting boss (34), and the other is provided with a second sliding hole (35), and the second sliding hole (35) is slidably fitted onto the first connecting boss (34) along the length direction of the first connecting boss (34); The movement trajectory of the first opening and closing handle (11) is an arc, the line connecting the highest point of the arc and the center of the arc is a reference line, the length direction of the first sliding hole (33) and the length direction of the first connecting boss (34) are parallel to the plane where the arc is located and are parallel to the reference line or have an angle of acute angle.

4. The switching device according to claim 2, characterized in that, The second end of the first connecting rod (31) and the third end of the second connecting rod (32) are provided with a first connecting boss (34) on one end and a second sliding hole (35) in the shape of an elongated hole on the other end. The first connecting boss (34) is slidably disposed in the second sliding hole (35) along the length direction of the second sliding hole (35).

5. The switching device according to claim 2, characterized in that, The linkage module (3) also includes a follower (36), which is connected to the second opening and closing handle (21) and hinged to the fourth end of the second connecting rod (32).

6. The switching device according to claim 5, characterized in that, The driven member (36) is provided with a shaped sliding hole (37), and the fourth end of the second connecting rod (32) is provided with a second connecting boss (38). The second connecting boss (38) is slidably disposed in the shaped sliding hole (37) along the extension direction of the shaped sliding hole (37).

7. The switching device according to claim 6, characterized in that, The linkage module (3) also includes a rotating shaft (39). The relative positions of the rotating shaft (39), the main switch body (12) of the main switch module (1), and the pre-charge body (23) of the pre-charge module (2) are fixed. The middle position of the second connecting rod (32) is rotated around the rotating shaft (39) and mounted on the rotating shaft (39).

8. The switching device according to claim 7, characterized in that, The irregular sliding hole (37) includes a circular arc segment (371) and a straight segment (372) connected together. The circular arc segment (371) has the axis of the rotating shaft (39) as the center of the arc. The extension direction of the straight segment (372) is perpendicular to the plane of the movement trajectory of the first opening and closing handle (11).

9. The switching device according to claim 5, characterized in that, The linkage module (3) also includes a guide rod (310). The relative positions of the guide rod (310), the main switch body (12) of the main switch module (1), and the pre-charge body (23) of the pre-charge module (2) are fixed. The driven member (36) is slidably disposed on the guide rod (310) along the length direction of the guide rod (310).

10. The switching device according to claim 5, characterized in that, The driven member (36) has a linkage groove (361) on the side near the precharge module (2), and the linkage groove (361) is fitted onto the second opening and closing handle (21).

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