Load switch

Abstract

The invention belongs to the technical field of high-voltage switches, and discloses a load switch, which comprises a moving contact assembly, a static contact, a mounting seat, a clamping piece, a vacuum arc-extinguishing chamber and a swing mechanism, and is characterized in that the swing mechanism comprises a swing assembly and a connecting assembly. A sliding groove is formed in the mounting base, and the clamping piece is clamped in the sliding groove in a sliding mode; the swing assembly is rotatably arranged on the mounting base, one end of the swing assembly is connected with the moving end of the vacuum arc-extinguishing chamber, and the connecting assembly is rotatably arranged at the other end of the swing assembly. According to the load switch, after the swing assembly rotates and drives the moving end of the vacuum arc-extinguishing chamber to move for opening, the other end of the swing assembly can be clamped with the clamping piece, so that the swing assembly and the clamping piece form mechanical connection, the vacuum arc-extinguishing chamber can be kept at the opening position, the structure is stable and reliable, and the operation is convenient. And the risk that the vacuum arc-extinguishing chamber is automatically switched to the closing position is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of high-voltage switches, and particularly to a load switch. Background Art

[0002] In the field of medium-voltage gas-insulated ring main units, sulfur hexafluoride (SF6) gas has been widely used as an insulating medium. This gas has excellent breaking performance and can extinguish the arc formed between the contacts during the breaking process of the load switch. However, as a greenhouse gas, it poses great harm to the environment. Instead, environmentally friendly gas-insulated ring main units are used, which usually use dry air as the insulating medium. However, dry air itself does not have the ability to break the load current of the load switch.

[0003] Currently, in a ring main unit, a vacuum interrupter is connected in parallel with a moving contact and is insulated by an environmentally friendly gas. When the moving contact and the static contact are separated, the vacuum interrupter is opened to extinguish the arc. In the prior art, generally, a transmission link structure drives the moving end of the vacuum interrupter to move and open. The transmission link structure has a tripping position and a closing position. During the separation process of the moving contact and the static contact, the moving contact drives the transmission link structure to rotate to the tripping position to separate the vacuum interrupter. During the closing process of the moving contact and the static contact, the moving contact drives the transmission link structure to rotate to the closing position to close the vacuum interrupter. In this structure, the transmission link structure is held in the tripping position and the closing position by a spring to ensure that the vacuum interrupter can be held in the tripping position and the closing position respectively. However, the spring structure has poor stability and is prone to misoperation. Summary of the Invention

[0004] The purpose of the present invention is to provide a load switch with high structural stability, avoiding the risk of the automatic switching of the vacuum interrupter to the closing position.

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

[0006] A load switch, comprising a moving contact assembly, a mounting seat, a clamping member, a vacuum interrupter, and a swinging mechanism;

[0007] The mounting seat is provided with a chute, and the clamping member is slidably clamped in the chute;

[0008] The swinging mechanism includes a swinging assembly and a connecting assembly. One end of the swinging assembly is connected to the moving end of the vacuum interrupter. The connecting assembly is rotatably arranged at the other end of the swinging assembly. The part of the swinging assembly between its one end and the other end is rotatably connected to the mounting seat;

[0009] The moving contact assembly rotates in a first rotation direction, drives the connection assembly to drive the swing assembly to rotate, one end of the swing assembly drives the moving end of the vacuum interrupter to move, and the other end of the swing assembly is clamped with the clamping member;

[0010] The moving contact assembly rotates in a second rotation direction, drives the connection assembly to rotate around the swing assembly, and the connection assembly drives the clamping member to move so that the clamping member disengages from the other end of the swing assembly; the first rotation direction and the second rotation direction are opposite.

[0011] As an alternative, a first elastic member is arranged in the sliding groove, the clamping member is slidably engaged in the sliding groove and is elastically connected to the mounting seat through the first elastic member, and the first elastic member is used to reset the clamping member.

[0012] As an alternative, the connection assembly includes a conductive block and an insulating member connected to each other, and the conductive block is rotatably connected to the other end of the swing assembly;

[0013] The moving contact assembly rotates in the first rotation direction to make conductive contact with the conductive block and drives the insulating member to drive the swing assembly to rotate; the moving contact assembly makes insulating contact with the insulating member in the second rotation direction and drives the insulating member to rotate around the swing assembly, and the insulating member drives the clamping member to move.

[0014] As an alternative, a first arc surface is arranged at the lower end of the clamping member facing away from the sliding groove, and when the insulating member rotates around the swing assembly, it can slide and abut against the first arc surface to drive the clamping member to move.

[0015] As an alternative, the insulating member includes two insulating blocks distributed at intervals, the conductive block is clamped between the two insulating blocks, and the conductive block and the two insulating blocks are fixedly connected by pins.

[0016] As an alternative, the moving contact assembly includes two knife arms distributed at intervals. When the two knife arms rotate in the first rotation direction, the conductive block passes through the interval between the two knife arms and makes conductive contact with the two knife arms respectively;

[0017] A chamfer is arranged at one end of the conductive block away from the insulating member, and the chamfer is used to avoid the knife arm.

[0018] As an alternative, the moving contact assembly includes two knife arms distributed at intervals. The two knife arms rotate along the first rotation direction and respectively drive the two insulating blocks to drive the swing assembly to rotate. The two knife arms rotate along the second rotation direction and respectively drive the two insulating blocks to rotate around the swing assembly, so that the two insulating blocks drive the clamping member to move.

[0019] As an alternative, a rotation notch and a stop portion disposed on one side of the rotation notch are provided at the other end of the swing assembly. The conductive block is rotatably disposed in the rotation notch;

[0020] When the moving contact assembly rotates along the first rotation direction and abuts against the insulating member, the conductive block abuts against the stop portion, so that the insulating member drives the swing assembly to rotate;

[0021] When the moving contact assembly rotates along the second rotation direction and abuts against the insulating member, the conductive block and the insulating member rotate around the swing assembly to drive the clamping member to move.

[0022] As an alternative, the swing assembly includes a transmission rod and a second elastic member disposed on the transmission rod. One end of the transmission rod is connected to the moving end of the vacuum interrupter. The other end of the transmission rod is used for clamping connection with the clamping member. The portions of the transmission rod at its one end and the other end are rotatably connected to the mounting seat. The second elastic member elastically abuts against the mounting seat.

[0023] As an alternative, a first hook is provided at the other end of the swing assembly, and a second hook is provided on the clamping member. When the connection assembly drives the swing assembly to rotate, the first hook is clamped on the second hook.

[0024] As an alternative, a second arc surface is provided at the upper end of the first hook facing the clamping member, and a third arc surface is provided at the lower end of the second hook facing the swing assembly. The second arc surface and the third arc surface protrude towards each other;

[0025] When the connection assembly drives the swing assembly to rotate, the second arc surface can slidably abut against the third arc surface, so that the first hook drives the clamping member to move, and the first hook is clamped on the second hook.

[0026] As an alternative, two connecting plates distributed at intervals are provided at the lower part of the mounting seat. The transmission rod is clamped between the two connecting plates. The transmission rod and the two connecting plates are connected by a rotating shaft.

[0027] As an alternative, a long slot is provided at the other end of the swing assembly, the connection assembly is arranged in the long slot through a rotating pin, and a third elastic member is connected between the rotating pin and the swing assembly. The third elastic member is used to make the rotating pin located on the side of the long slot close to the mounting base.

[0028] As an alternative, the load switch further includes a housing, and a cross beam is arranged inside the housing;

[0029] The mounting base includes:

[0030] A main body part is provided with a mounting groove. The main body part is connected to the cross beam, the vacuum interrupter is arranged in the mounting groove, and the movable end of the vacuum interrupter extends out of the mounting groove and is connected to one end of the swing assembly;

[0031] An extension plate is arranged at one end of the main body part away from the cross beam. The extension plate is provided with the sliding groove, and the clamping member is slidably engaged in the sliding groove.

[0032] Advantages of the present invention:

[0033] For the load switch provided by the present invention, when the swing assembly rotates, it can drive the movable end of the vacuum interrupter to move. After the switch is tripped, the other end of the swing assembly can be clamped with the clamping member, so that the swing assembly and the clamping member form a mechanical connection, enabling the vacuum interrupter to remain in the tripped position, with a stable and reliable structure, avoiding the risk of the vacuum interrupter automatically switching to the closed position; and when the moving contact assembly rotates in the second rotation direction, by driving the connection assembly to rotate around the swing assembly, the connection assembly drives the clamping member to move, so that the clamping member disengages from the other end of the swing assembly, realizing the reset of the swing assembly, and at the same time driving the vacuum interrupter to switch to the closed position, with simple and reliable operation. Description of the drawings

[0034] Figure 1 is a schematic structural diagram of the load switch provided by the embodiment of the present invention with the housing removed;

[0035] Figure 2 is a schematic structural diagram of the mounting base involved in the embodiment of the present invention;

[0036] Figure 3 is a partial schematic structural diagram of the load switch provided by the embodiment of the present invention;

[0037] Figure 4 is Figure 1 the enlarged structural diagram at position A in

[0038] Figure 5 is a schematic structural diagram of the conductive block involved in the embodiment of the present invention;

[0039] Figure 6 It is a schematic structural diagram of the load switch provided by an embodiment of the present invention;

[0040] Figure 7 is Figure 6 an enlarged view of the structure at position B in

[0041] Figures 8 - 11 a schematic diagram when the moving contact assembly rotates in the first rotation direction;

[0042] Figures 12 - 15 a schematic diagram when the moving contact assembly rotates in the second rotation direction.

[0043] In the figure:

[0044] 1. Moving contact assembly; 11. Knife arm;

[0045] 2. Static contact;

[0046] 3. Mounting seat; 31. Chute; 32. Mounting groove; 33. Main body part; 331. Connecting plate; 34. Extension plate;

[0047] 4. Clamping part; 41. First arc surface; 42. Second catch; 421. Third arc surface; 43. Avoidance notch;

[0048] 5. Vacuum arc extinguishing chamber; 51. Mobile end;

[0049] 6. Swing assembly; 61. Transmission rod; 611. First catch; 6111. Second arc surface; 612. Long slot hole; 613. Rotation notch; 614. Stopping part; 62. Second elastic part; 63. Rotating shaft;

[0050] 7. Connection assembly; 71. Conductive block; 711. Chamfer; 72. Insulating part; 721. Insulating block;

[0051] 8. First elastic part;

[0052] 9. Third elastic part;

[0053] 10. Rotating pin;

[0054] 20. Busbar;

[0055] 30. Housing; 301. Cross beam. Detailed implementation manners

[0056] The embodiments of the present invention will be described in detail below. The examples of the embodiments are shown in the drawings, where the same or similar reference numerals denote the same or similar components or components with the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary and are intended to explain the present invention, and should not be construed as limiting the present invention.

[0057] In the description of the present invention, unless otherwise clearly defined and limited, the terms "connected", "connected to", and "fixed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, a mechanical connection, or an electrical connection. It can be directly connected or indirectly connected through an intermediate medium. It can be the communication inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0058] In the description of the present invention, unless otherwise clearly defined and limited, the first feature being "above" or "below" the second feature may include the direct contact between the first feature and the second feature, or may include the situation where the first feature and the second feature are not in direct contact but in contact through other features between them. Moreover, the first feature being "above", "above and to the right", and "on the upper surface" of the second feature includes that the first feature is directly above and obliquely above the second feature, or simply means that the horizontal height of the first feature is higher than that of the second feature. The first feature being "below", "below and to the left", and "on the lower surface" of the second feature includes that the first feature is directly below and obliquely below the second feature, or simply means that the horizontal height of the first feature is lower than that of the second feature.

[0059] The technical solution of the present invention will be further described below in conjunction with the accompanying drawings and through specific embodiments.

[0060] As Figures 1 - 4 shown, an embodiment of the present invention provides a load switch, which includes a moving contact assembly 1, a static contact 2, a vacuum interrupter 5, a swing mechanism, a mounting seat 3, and a clamping member 4. The swing mechanism includes a swing assembly 6 and a connection assembly 7.

[0061] Wherein, the mounting seat 3 is provided with a sliding groove 31, and the clamping member 4 is slidably engaged in the sliding groove 31; one end of the swing assembly 6 is connected to the moving end 51 of the vacuum interrupter 5, the connection assembly 7 is rotatably arranged at the other end of the swing assembly 6, and the part of the swing assembly 6 between its one end and the other end is rotatably connected to the mounting seat 3.

[0062] As Figures 8 - 11 shown, during the process of the load switch switching from the closed state to the open state, the moving contact assembly 1 rotates in the first rotation direction to separate from the static contact 2. At the same time, the moving contact assembly 1 is in conductive contact with the connection assembly 7 and forms a conductive loop with the vacuum interrupter 5. The continuous rotation of the moving contact assembly 1 can also drive the connection assembly 7 to drive the swing assembly 6 to rotate, so that one end of the swing assembly 6 rotates to drive the moving end 51 of the vacuum interrupter 5 to move downward, so as to realize the arc extinction of the vacuum interrupter 5 during opening. At the same time, the other end of the swing assembly 6 rotates upward and is clamped with the clamping member 4, so that the swing assembly 6 can form a mechanical connection with the clamping member 4, so that the vacuum interrupter 5 can be kept in the open position.

[0063] As Figures 12 - 15 shown, during the process of the load switch switching from the open state to the closed state, the moving contact assembly 1 rotates in the second rotation direction and drives the connecting assembly 7 to rotate around the swing assembly 6. The connecting assembly 7 drives the clamping member 4 to move, so that the clamping member 4 disengages from the other end of the swing assembly 6. Since the connection between the swing assembly 6 and the clamping member 4 is disengaged, the swing assembly 6 rotates and resets, causing the end of the swing assembly 6 connected to the moving end 51 of the vacuum interrupter 5 to rotate and move upward, so that the vacuum interrupter 5 is switched to the closed position.

[0064] When the swing assembly 6 drives the moving end 51 of the vacuum interrupter 5 to move and open during rotation in the load switch, the other end of the swing assembly 6 can be clamped with the clamping member 4, so that the swing assembly 6 and the clamping member 4 form a mechanical connection, enabling the vacuum interrupter 5 to remain in the open position, with a stable and reliable structure, avoiding the risk of the vacuum interrupter 5 automatically switching to the closed position; and when the moving contact assembly 1 rotates in the second rotation direction, it drives the clamping member 4 to move by driving the connecting assembly 7, so that the clamping member 4 disengages from the other end of the swing assembly 6, realizing the reset of the swing assembly 6 and driving the vacuum interrupter 5 to switch to the closed position, with simple and reliable operation.

[0065] Optionally, a first elastic member 8 is arranged in the sliding groove 31. The clamping member 4 is slidably engaged in the sliding groove 31. The clamping member 4 is elastically connected to the mounting seat 3 through the first elastic member 8, that is, the first elastic member 8 is arranged in the sliding groove 31 and elastically connected between the clamping member 4 and the inner wall of the sliding groove 31. The first elastic member 8 is used to reset the clamping member 4. After the connecting assembly 7 drives the clamping member 4 to disengage from the swing assembly 6, the clamping member 4 resets under the elastic force of the first elastic member 8.

[0066] Optionally, the connecting component 7 includes a conductive block 71 and an insulating member 72. The conductive block 71 is rotatably connected to the other end of the swinging component 6, and the insulating member 72 is fixedly connected to the conductive block 71. When the moving contact component 1 rotates in the first rotation direction, it first makes conductive contact with the conductive block 71 and forms a conductive loop with the vacuum interrupter 5. Then, the moving contact component 1 continues to rotate in the first rotation direction and abuts against the insulating member 72, generating a pushing force on the insulating member 72 so that the insulating member 72 drives the swinging component 6 to rotate counterclockwise, realizing that one end of the swinging component 6 rotates downward to drive the moving end 51 of the vacuum interrupter 5 to move for arc extinction. At the same time, the other end of the swinging component 6 rotates upward and is clamped with the clamping member 4. When the moving contact component 1 rotates in the second rotation direction, it makes insulating contact with the insulating member 72 and pushes the insulating member 72 to rotate counterclockwise around the swinging component 6, so that the insulating member 72 abuts against and pushes the clamping member 4 to move away from the mounting seat 3 against the acting force of the first elastic member 8. In this structure, the conductive block 71 is made of a conductor material, which plays the role of current conduction and transmission connection. The insulating member 72 generates an acting force on the clamping member 4 when rotating counterclockwise, and makes the clamping member 4 move away from the mounting seat 3, so that the other end of the swinging component 6 is disengaged from the clamping member 4 to complete the closing of the vacuum interrupter 5.

[0067] It should be noted that, as Figures 6 - 7 shown, the swinging component 6 includes a transmission rod 61. The other end of the transmission rod 61 is provided with a rotation notch 613 and a stop portion 614 disposed on one side of the rotation notch 613. The conductive block 71 is rotatably disposed in the rotation notch 613. Since the insulating member 72 and the conductive block 71 are fixedly connected, when the moving contact component 1 pushes the insulating member 72 in the first rotation direction, the conductive block 71 is limited by the stop portion 614. Therefore, the insulating member 72 and the conductive block 71 rotate simultaneously and can drive the swinging component 6 to rotate counterclockwise after being limited. When the moving contact component 1 rotates in the second rotation direction and pushes the insulating member 72, the conductive block 71 rotates in the rotation notch 613 and rotates around the transmission rod 61 following the insulating member 72 without being restricted by the swinging component 6. At this time, the transmission rod 61 remains in a state of being clamped with the clamping member 4. When the insulating member 72 rotates to abut against the clamping member 4, the clamping member 4 moves away from the mounting seat 3 under the pushing action of the insulating member 72, so that the other end of the transmission rod 61 of the swinging component 6 is disengaged from the clamping member 4. After the transmission rod 61 of the swinging component 6 is disengaged, the clamping member 4 resets under the acting force of the first elastic member 8. It can be understood that, to avoid interference between the conductive block 71 and the clamping member 4, an avoidance notch 43 is provided on the side of the clamping member 4 away from the mounting seat 3, and the conductive block 71 rotates into the avoidance notch 43 to avoid interference.

[0068] Optionally, as Figure 4As shown, a first arc surface 41 is provided at the lower end of the clamping member 4 facing away from the sliding groove 31. Along the direction in which the clamping member 4 moves away from the mounting base 3, the first arc surface 41 is inclined downward. When the insulating member 72 rotates counterclockwise, it can slide and abut against the first arc surface 41, enabling the clamping member 4 to move away from the mounting base 3. This structural arrangement enables the insulating member 72 to move the clamping member 4 away from the mounting base 3 when rotating counterclockwise, thereby disconnecting the other end of the swinging assembly 6 from the clamping member 4.

[0069] In this embodiment, the moving contact assembly 1 includes two knife arms 11 spaced apart.

[0070] Referring to Figure 3 and combining with Figure 5 As shown, when the moving contact assembly 1 rotates in the first rotation direction, the conductive block 71 can pass through the gap between the two knife arms 11 and be in conductive contact with the two knife arms 11 respectively. When the moving contact assembly 1 rotates in the first rotation direction, in order to ensure that the conductive block 71 can smoothly enter the gap between the two knife arms 11 and at the same time ensure reliable conductive contact between the knife arm 11 and the conductive block 71, a chamfer 711 is provided at the end of the conductive block 71 away from the insulating member 72. The chamfer 711 is used to avoid the knife arm 11 so that the conductive block 71 can smoothly enter the gap between the two knife arms 11.

[0071] Optionally, the insulating member 72 includes two insulating blocks 721 spaced apart on both sides of the conductive block 71. The conductive block 71 is clamped between the two insulating blocks 721. The two insulating blocks 721 and the conductive block 71 are fixedly connected by a pin. When the moving contact assembly 1 rotates in the first rotation direction or the second rotation direction, the two knife arms 11 respectively abut against the two insulating blocks 721. By setting the insulating member 72 as two insulating blocks 721, the two knife arms 11 of the moving contact assembly 1 respectively push the two insulating blocks 721 to rotate, and the received pushing force is more uniform. When the moving contact assembly 1 rotates in the first rotation direction, the two knife arms 11 rotate towards the conductive block 71. As the conductive block 71 gradually enters the gap between the two knife arms 11, the moving contact assembly 1 continues to rotate in the first rotation direction and the conductive block 71 separates from the two knife arms 11 again. During this process, the conductive block 71 not only realizes conductive contact with the knife arm 11 but also realizes guiding of the moving contact assembly 1, enabling the two knife arms 11 to accurately abut against the two insulating blocks 721, and the action is more stable and reliable.

[0072] In this embodiment, the insulating block 721 is set in a V shape. The V-shaped insulating block 721 includes a lower extension part and an upper extension part distributed at an angle. The knife arm 11 can abut against the lower extension part. The upper extension part has a triangular structure, and its pointed end is used to abut against the first arc surface 41 of the clamping member 4 to realize the movement of the clamping member 4.

[0073] Optionally, referring again to Figure 1 andFigure 4 As shown, the swing assembly 6 includes a transmission rod 61 and a second elastic member 62 disposed on the transmission rod 61, the transmission rod 61 is rotatably connected to the mounting seat 3, one end of the transmission rod 61 is connected to the moving end 51 of the vacuum interrupter 5, the other end of the transmission rod 61 is used to be clamped with the clamping member 4, and the second elastic member 62 elastically abuts against the mounting seat 3. When the other end of the transmission rod 61 is clamped with the clamping member 4, the second elastic member 62 enables the transmission rod 61 to be stably clamped with the clamping member 4, and when the insulating member 72 pushes the clamping member 4 to move away from the mounting seat 3, the second elastic member 62 enables the transmission rod 61 to rotate and reset, and drives the moving end 51 of the vacuum interrupter 5 to switch to the closing position.

[0074] Specifically, the other end of the transmission rod 61 is provided with a first hook 611, the first hook 611 is arranged away from the mounting seat 3, and the clamping member 4 is provided with a second hook 42 extending toward the mounting seat 3. When the moving contact assembly 1 rotates along the first rotation direction to push the insulating member 72, the insulating member 72 drives the transmission rod 61 to rotate, and the first hook 611 can slide against the second hook 42 to drive the clamping member 4 to overcome the force of the first elastic member 8 and move away from the mounting seat 3, so that the first hook 611 is clamped with the second hook 42. In this structure, the first hook 611 slides against the second hook 42, so that the transmission rod 61 can apply a pushing force to the clamping member 4 during the process of rotating and moving upward, so that the clamping member 4 can move away from the mounting seat 3. When the first hook 611 rotates to the right position, the clamping member 4 is reset under the force of the first elastic member 8, so that the first hook 611 is conveniently clamped with the second hook 42.

[0075] Optionally, a second arc surface 6111 is provided at the upper end of the first hook 611 toward the connecting member 4, and a third arc surface 421 is provided at the lower end of the second hook 42 toward the transmission rod 61. The second arc surface 6111 and the third arc surface 421 protrude toward each other. When the insulating member 72 drives the transmission rod 61 to rotate, the second arc surface 6111 and the third arc surface 421 are slidably abutted against each other, so that the first hook 611 drives the connecting member 4 to overcome the force of the first elastic member 8 and move away from the mounting seat 3.

[0076] Optionally, two spaced connection plates 331 are provided at the lower portion of the mounting base 3 , the portion of the transmission rod 61 between one end and the other end thereof is clamped between the two connection plates 331 , and the transmission rod 61 and the two connection plates 331 are connected via a rotating shaft 63 .

[0077] To ensure reliable contact between the conductive block 71 and the two knife arms 11, a long slot hole 612 is provided at the other end of the transmission rod 61 of the swing assembly 6. The long slot hole 612 penetrates through the rotation notch 613. The conductive block 71 of the connection assembly 7 is provided with a rotation pin 10. The rotation pin 10 is arranged in the long slot hole 612, and a third elastic member 9 is connected between the rotation pin 10 and the transmission rod 61. In the natural state (i.e., the state where the insulating member 72 is not subject to a top thrust), the third elastic member 9 is used to make the rotation pin 10 located on the side of the long slot hole 612 close to the mounting base 3. When the moving contact assembly 1 rotates in the first rotation direction and the knife arm 11 is in conductive contact with the conductive block 71, a certain dead zone is reserved. That is, when the knife arm 11 abuts against the insulating block 721 to drive the conductive block 71 to rotate, the rotation pin 10 first overcomes the acting force of the third elastic member 9 and transfers from the side of the long slot hole 612 close to the mounting base 3 to the side of the long slot hole 612 far from the mounting base 3. During this process, the transmission rod 61 does not rotate, increasing the conductive contact time between the conductive block 71 and the knife arm 11 and ensuring reliable transfer of current to the conductive loop of the vacuum interrupter 5.

[0078] Optionally, the first elastic member 8 and the third elastic member 9 can be selected as tension springs; the second elastic member 62 can be selected as a compression spring.

[0079] Referring again to Figure 6 As shown, the load switch further includes a housing 30 and a bus bar 20. The bus bar 20 is arranged in the housing 30. The vacuum interrupter 5 is vertically distributed and connected to the bus bar 20, and when the load switch is closed, the vacuum interrupter 5 is also parallel to the knife arm 11 of the moving contact assembly 1.

[0080] Optionally, the housing 30 is provided with a cross beam 301; the mounting base 3 includes a main body portion 33 and an extension plate 34. The main body portion 33 is provided with a mounting groove 32. The main body portion 33 is connected to the cross beam 301. The vacuum interrupter 5 is arranged in the mounting groove 32, and the moving end of the vacuum interrupter 5 extends out of the mounting groove 32 and is connected to one end of the transmission rod 61; the extension plate 34 is arranged at one end of the main body portion 33 far from the cross beam 301, and the extension plate 34 is provided with a sliding groove 31. This structure realizes the installation and fixation of the mounting base 3.

[0081] This load switch can achieve reliable current transfer during the opening process. During the process of the knife arm 11 of the moving contact assembly 1 pushing against the insulating member 72 during the closing process, the moving contact assembly 1 first contacts the static contact 2, and then the first hook 611 and the second hook 42 are disengaged, causing the transmission rod 61 to rotate and reset, and the vacuum interrupter 5 is switched to the closed position, ensuring that the closing process is completed by the moving contact assembly 1 and improving the action reliability.

[0082] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, rather than limitations on the implementation manners of the present invention. For those of ordinary skill in the art, other different forms of changes or alterations can be made based on the above description. It is not necessary and impossible to enumerate all the implementation manners here. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the claims of the present invention.

Claims

1. Load switch, characterized in that, It includes a moving contact assembly (1), a mounting seat (3), a clamping member (4), a vacuum interrupter (5) and a swinging mechanism: The mounting seat (3) is provided with a chute (31), and the clamping member (4) is slidably engaged in the chute (31); The swinging mechanism includes a swinging assembly (6) and a connecting assembly (7). One end of the swinging assembly (6) is connected to the moving end (51) of the vacuum interrupter (5). The connecting assembly (7) is rotatably arranged at the other end of the swinging assembly (6). The part of the swinging assembly (6) between its one end and the other end is rotatably connected to the mounting seat (3); The moving contact assembly (1) rotates in a first rotation direction and drives the connecting assembly (7) to drive the swinging assembly (6) to rotate. One end of the swinging assembly (6) drives the moving end (51) of the vacuum interrupter (5) to move, and the other end of the swinging assembly (6) is clamped with the clamping member (4); The moving contact assembly (1) rotates in a second rotation direction and drives the connecting assembly (7) to rotate around the swinging assembly (6). The connecting assembly (7) drives the clamping member (4) to move so that the clamping member (4) disengages from the other end of the swinging assembly (6); the first rotation direction and the second rotation direction are opposite.

2. The load switch according to claim 1, characterized in that, A first elastic member (8) is arranged in the chute (31). The clamping member (4) is slidably engaged in the chute (31) and is elastically connected to the mounting seat (3) through the first elastic member (8). The first elastic member (8) is used to reset the clamping member (4).

3. The load switch according to claim 1, characterized in that, The connecting assembly (7) includes a conductive block (71) and an insulating member (72) connected to each other. The conductive block (71) is rotatably connected to the other end of the swinging assembly (6); The moving contact assembly (1) rotates in the first rotation direction and makes conductive contact with the conductive block (71), and drives the insulating member (72) to drive the swinging assembly (6) to rotate; the moving contact assembly (1) rotates in the second rotation direction and makes insulating contact with the insulating member (72), and drives the insulating member (72) to rotate around the swinging assembly (6). The insulating member (72) drives the clamping member (4) to move.

4. The load switch according to claim 3, characterized in that, A first arc surface (41) is arranged at the lower end of the clamping member (4) facing away from the chute (31). When the insulating member (72) rotates around the swinging assembly (6), it can slide and abut against the first arc surface (41) to drive the clamping member (4) to move.

5. The load switch according to claim 3, characterized in that, The insulating member (72) includes two insulating blocks (721) distributed at intervals. The conductive block (71) is clamped between the two insulating blocks (721), and the conductive block (71) is fixedly connected to the two insulating blocks (721); 6. The load switch according to claim 3, characterized in that, The moving contact assembly (1) includes two knife arms (11) distributed at intervals. When the two knife arms (11) rotate in the first rotation direction, the conductive block (71) passes through the interval between the two knife arms (11) and makes conductive contact with the two knife arms (11) respectively; One end of the conductive block (71) away from the insulating member (72) is provided with a chamfer (711), and the chamfer (711) is used to avoid the tool arm (11).

7. The load switch according to claim 5, characterized in that, The moving contact assembly (1) includes two tool arms (11) distributed at intervals. The two tool arms (11) rotate along the first rotation direction and respectively drive the two insulating blocks (721) to drive the swing assembly (6) to rotate. The two tool arms (11) rotate along the second rotation direction and respectively drive the two insulating blocks (721) to rotate around the swing assembly (6), so that the two insulating blocks (721) drive the clamping member (4) to move.

8. The load switch according to claim 3, characterized in that, The other end of the swing assembly (6) is provided with a rotation notch (613) and a stop portion (614) arranged on one side of the rotation notch (613). The conductive block (71) is rotatably arranged in the rotation notch (613); When the moving contact assembly (1) rotates along the first rotation direction and abuts against the insulating member (72), the conductive block (71) abuts against the stop portion (614), so that the insulating member (72) drives the swing assembly (6) to rotate; When the moving contact assembly (1) rotates along the second rotation direction and abuts against the insulating member (72), the conductive block (71) and the insulating member (72) rotate around the swing assembly (6) to drive the clamping member (4) to move.

9. The load switch according to claim 1, characterized in that, The swing assembly (6) includes a transmission rod (61) and a second elastic member (62) arranged on the transmission rod (61). One end of the transmission rod (61) is connected to the moving end (51) of the vacuum interrupter (5). The other end of the transmission rod (61) is used for clamping with the clamping member (4). The part of the transmission rod (61) between its one end and the other end is rotatably connected to the mounting seat (3). The second elastic member (62) elastically abuts against the mounting seat (3).

10. The load switch according to claim 1, characterized in that, The other end of the swing assembly (6) is provided with a first hook (611). The clamping member (4) is provided with a second hook (42). When the connection assembly (7) drives the swing assembly (6) to rotate, the first hook (611) is clamped on the second hook (42).

11. The load switch according to claim 10, characterized in that, The first hook (611) is provided with a second arc surface (6111) facing the upper end of the clamping member (4). The second hook (42) is provided with a third arc surface (421) facing the lower end of the swing assembly (6). The second arc surface (6111) and the third arc surface (421) bulge towards each other; When the connection assembly (7) drives the swing assembly (6) to rotate, the second arc surface (6111) slidably abuts against the third arc surface (421), so that the first hook (611) drives the clamping member (4) to move, and the first hook (611) is clamped on the second hook (42).

12. The load switch according to claim 9, characterized in that, Two spaced-apart connecting plates (331) are provided at the lower part of the mounting base (3). The part of the transmission rod (61) between its one end and the other end is clamped between the two connecting plates (331), and the transmission rod (61) and the two connecting plates (331) are connected by a rotating shaft (63).

13. The load switch according to claim 1, characterized in that, A long slot hole (612) is provided at the other end of the swing assembly (6). The connecting assembly (7) is arranged in the long slot hole (612) through a rotating pin (10). A third elastic member (9) is connected between the rotating pin (10) and the swing assembly (6), and the third elastic member (9) is used to make the rotating pin (10) located on the side of the long slot hole (612) close to the mounting base (3).

14. The load switch according to claim 1, characterized in that, The load switch further includes a housing (30), and a cross beam (301) is arranged in the housing (30); The mounting base (3) includes: A main body part (33) is provided with a mounting groove (32). The main body part (33) is connected to the cross beam (301). The vacuum interrupter (5) is arranged in the mounting groove (32), and the moving end of the vacuum interrupter (5) extends out of the mounting groove (32) and is connected to one end of the swing assembly (6); An extension plate (34) is arranged at one end of the main body part (33) away from the cross beam (301). The extension plate (34) is provided with the sliding groove (31), and the clamping member (4) is slidably engaged in the sliding groove (31).

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