load switch

Abstract

The present invention belongs to the technical field of high-voltage switches, and discloses a load switch, comprising a moving contact assembly, a static contact, a mounting seat, a clamping member, a vacuum interrupter, and a swinging mechanism, wherein the swinging mechanism comprises a swinging assembly and a connecting assembly. The mounting seat is provided with a slide groove, and the clamping member is slidably engaged in the slide groove; the swinging assembly is rotatably arranged on the mounting seat, and one end of the swinging assembly is connected to the moving end of the vacuum interrupter, and the connecting assembly is rotatably arranged at the other end of the swinging assembly. After the swinging assembly in the load switch rotates and drives the moving end of the vacuum interrupter to move to the open position, the other end of the swinging assembly can be clamped with the clamping member, so that the swinging assembly and the clamping member form a mechanical connection, so that the vacuum interrupter can be maintained in the open position, the structure is stable and reliable, and the risk of the vacuum interrupter automatically switching to the closed position is avoided.

Description

Technical Field

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

[0002] In the field of medium-pressure pneumatic ring main unit, it has been widely used in the past. (sulfur hexafluoride) gas as the insulating medium, Gas has excellent breaking performance and can extinguish the arc formed between the contacts during the breaking process of the load switch. As a greenhouse gas, it is extremely harmful to the environment. Instead, environmentally friendly pneumatic ring main units are used. Environmentally friendly pneumatic ring main units usually use dry air as the insulating medium. However, dry air itself does not have the ability to interrupt the load current of the load switch.

[0003] At present, the ring main unit utilizes a vacuum interrupter and a moving contact in parallel, and is insulated by environmentally friendly gas. When the moving contact is disconnected from the static contact, the vacuum interrupter is opened to extinguish the arc. In the prior art, a transmission connecting rod structure is generally used to drive the moving end of the vacuum interrupter to move and disconnect. The transmission connecting rod structure has an opening position and a closing position. When the moving contact is disconnected from the static contact, the moving contact drives the transmission connecting rod structure to rotate to the opening position to open the vacuum interrupter. When the moving contact is closed with the static contact, the moving contact drives the transmission connecting rod structure to rotate to the closing position to close the vacuum interrupter. In this structure, the transmission connecting rod structure is maintained in the opening position and the closing position by a spring to ensure that the vacuum interrupter can be maintained in the opening position and the closing position respectively. However, the spring structure has poor stability and is prone to misoperation. Summary of the Invention

[0004] The object of the present invention is to provide a load switch with high structural stability, which avoids the risk of the vacuum interrupter automatically switching to the closed position.

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

[0006] Load switch, including moving contact assembly, mounting seat, clamping parts, vacuum interrupter and swing mechanism;

[0007] The mounting seat is provided with a slide groove, and the clamping member is slidably engaged in the slide groove;

[0008] The swing mechanism includes a swing assembly and a connecting assembly, one end of the swing assembly is connected to the moving end of the vacuum interrupter, the connecting assembly is rotatably arranged at the other end of the swing assembly, and a portion of the swing assembly located between the one end and the other end is rotatably connected to the mounting base;

[0009] The moving contact assembly rotates along a first rotation direction and drives the connecting 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 engaged with the clamping member;

[0010] The moving contact assembly rotates along the second rotation direction and drives the connecting assembly to rotate around the swing assembly. The connecting assembly drives the clamping member to move so that the clamping member is disengaged from the other end of the swing assembly. The first rotation direction is opposite to the second rotation direction.

[0011] As an optional solution, a first elastic member is provided in the slide groove, the clamping member is slidably engaged in the slide 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 optional solution, the connecting 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 along 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 is insulated from and makes contact with the insulating member along 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 optional solution, a first arc surface is provided at the lower end of the clamping member away from the slide groove, and the insulating member can slide and abut against the first arc surface when rotating around the swing assembly to drive the clamping member to move.

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

[0016] As an optional solution, the movable contact assembly includes two knife arms distributed at intervals, and when the two knife arms rotate along the first rotation direction, the conductive block passes through the interval between the two knife arms and respectively makes conductive contact with the two knife arms;

[0017] One end of the conductive block away from the insulating member is provided with a chamfer, and the chamfer is used to avoid the knife arm.

[0018] As an optional solution, the moving contact assembly includes two spaced-apart knife arms, 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 part to move.

[0019] As an optional solution, the other end of the swing assembly is provided with a rotation notch and a stopper provided on one side of the rotation notch, and the conductive block is rotatably provided in the rotation notch;

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

[0021] When the movable contact assembly moves 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 optional solution, the swing assembly includes a transmission rod and a second elastic member arranged on the transmission rod, one end of the transmission rod is connected to the movable end of the vacuum arc chamber, and the other end of the transmission rod is used to engage with the clamping member, the parts of the transmission rod at one end and the other end are rotatably connected to the mounting seat, and the second elastic member elastically abuts against the mounting seat.

[0023] As an optional solution, the other end of the swing assembly is provided with a first hook, and the connecting member is provided with a second hook. When the connecting assembly drives the swing assembly to rotate, the first hook is connected to the second hook.

[0024] As an optional solution, the first hook is provided with a second arc surface at an upper end facing the clamping member, and the second hook is provided with a third arc surface at a lower end facing the swing assembly, and the second arc surface and the third arc surface are convex toward each other;

[0025] When the connecting assembly drives the swing assembly to rotate, the second arc surface can slide and 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 optional solution, two spaced-apart connecting plates are provided at the lower portion of the mounting seat, the transmission rod is clamped between the two connecting plates, and the transmission rod and the two connecting plates are connected via a rotating shaft.

[0027] As an optional solution, a long slot hole is provided at the other end of the swing component, and the connecting component is arranged in the long slot hole through a rotating pin. A third elastic member is connected between the rotating pin and the swing component, and the third elastic member is used to make the rotating pin located on the side of the long slot hole close to the mounting seat.

[0028] As an optional solution, the load switch further includes a housing, wherein a crossbeam is provided in the housing;

[0029] The mounting base comprises:

[0030] A main body is provided with a mounting groove, the main body is connected to the crossbeam, 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 provided at one end of the main body away from the crossbeam. The extension plate is provided with the sliding groove, and the clamping member is slidably engaged in the sliding groove.

[0032] Beneficial effects of the present invention:

[0033] The load switch provided by the present invention has a swing assembly that can drive the moving end of the vacuum interrupter to move and open the switch when it rotates. The other end of the swing assembly can be engaged with the clamping piece to form a mechanical connection between the swing assembly and the clamping piece, so that the vacuum interrupter can be maintained in the open position. The structure is stable and reliable, and the risk of the vacuum interrupter automatically switching to the closed position is avoided; and when the moving contact assembly rotates along the second rotation direction, the connecting assembly is driven to rotate around the swing assembly, and the connecting assembly drives the clamping piece to move, so that the clamping piece is disengaged from the other end of the swing assembly, thereby realizing the resetting of the swing assembly and at the same time driving the vacuum interrupter to switch to the closed position. The operation is simple and reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 This is a schematic structural diagram of a load switch provided by an embodiment of the present invention without a housing;

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

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

[0037] Figure 4 yes Figure 1 A magnified view of the structure at point A;

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

[0039] Figure 6 Schematic diagram of the structure of the load switch provided by the embodiment of the present invention;

[0040] Figure 7 yes Figure 6 A magnified view of the structure at B in the middle;

[0041] Figures 8-11 is a schematic diagram of the moving contact assembly rotating along a first rotation direction;

[0042] Figure 12-15 It is a schematic diagram of the moving contact assembly rotating along the second rotation direction.

[0043] In the picture:

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

[0045] 2. Static contact;

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

[0047] 4. Connecting piece; 41. First arc surface; 42. Second hook; 421. Third arc surface; 43. Avoidance gap;

[0048] 5. Vacuum interrupter; 51. Mobile terminal;

[0049] 6. Swing assembly; 61. Transmission rod; 611. First hook; 6111. Second arc surface; 612. Long slot; 613. Rotation notch; 614. Stopper; 62. Second elastic member; 63. Rotation shaft;

[0050] 7. Connecting assembly; 71. Conductive block; 711. Chamfer; 72. Insulating member; 721. Insulating block;

[0051] 8. a first elastic member;

[0052] 9. a third elastic member;

[0053] 10. Rotating pin;

[0054] 20. Busbar;

[0055] 30. Shell; 301. Beam. DETAILED DESCRIPTION

[0056] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar components or components having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to explain the present invention, but are not to be construed as limiting the present invention.

[0057] In the description of the present invention, unless otherwise expressly specified or limited, the terms "connected," "connected," and "fixed" should be understood in a broad sense. For example, they may refer to fixed or detachable connections, mechanical or electrical connections, direct or indirect connections through an intermediate medium, and internal communication between two elements or interaction between two elements. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0058] In the description of the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first feature being in direct contact with the second feature, or may include the first feature being in contact with the second feature through another feature between them instead of being in direct contact. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0059] The technical solution of the present invention will be further described below with reference to the accompanying drawings and through specific implementation methods.

[0060] like Figures 1-4 As 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 connecting assembly 7.

[0061] Among them, the mounting base 3 is provided with a slide groove 31, and the clamping part 4 slides and engages in the slide groove 31; one end of the swing assembly 6 is connected to the movable end 51 of the vacuum arc chamber 5, and the connecting assembly 7 is rotatably set at the other end of the swing assembly 6, and the part of the swing assembly 6 located between one end and the other end is rotatably connected to the mounting base 3.

[0062] like Figures 8-11 As shown, when the load switch switches from the closed state to the open state, the moving contact assembly 1 rotates around the first rotation direction and separates from the static contact 2. At the same time, the moving contact assembly 1 is in conductive contact with the connecting assembly 7 and forms a conductive circuit with the vacuum interrupter 5. The moving contact assembly 1 continues to rotate and can also drive the connecting 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 opening and arc extinguishing of the vacuum interrupter 5, and at the same time, the other end of the swing assembly 6 rotates upward and engages 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 maintained in the open position.

[0063] like Figure 12-15 As shown, when the load switch switches from the open state to the closed state, the moving contact assembly 1 rotates around 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 is disengaged 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, so that the end of the swing assembly 6 connected to the moving end 51 of the vacuum interrupter 5 rotates and moves upward, so that the vacuum interrupter 5 is switched to the closed position.

[0064] When the swing assembly 6 in the load switch rotates, it drives the moving end 51 of the vacuum interrupter 5 to move and open the switch. The other end of the swing assembly 6 can be engaged with the clamping member 4 to form a mechanical connection between the swing assembly 6 and the clamping member 4, so that the vacuum interrupter 5 can be maintained in the open position. The structure is stable and reliable, and the risk of the vacuum interrupter 5 automatically switching to the closed position is avoided; and when the moving contact assembly 1 rotates along the second rotation direction, it drives the connecting assembly 7 to move, so that the clamping member 4 is disengaged from the other end of the swing assembly 6, thereby realizing the reset of the swing assembly 6 and driving the vacuum interrupter 5 to switch to the closed position. The operation is simple and reliable.

[0065] Optionally, a first elastic member 8 is provided in the chute 31, and the clamping member 4 is slidably engaged in the chute 31. The clamping member 4 and the mounting seat 3 are elastically connected via the first elastic member 8. That is, the first elastic member 8 is provided in the chute 31 and elastically connected between the clamping member 4 and the inner wall of the chute 31. The first elastic member 8 is used to reset the clamping member 4. When the connecting assembly 7 drives the clamping member 4 to disengage from the swing assembly 6, the clamping member 4 is reset under the elastic force of the first elastic member 8.

[0066] Optionally, the connecting assembly 7 includes a conductive block 71 and an insulating member 72, wherein the conductive block 71 is rotationally connected to the other end of the swing assembly 6, and the insulating member 72 is fixedly connected to the conductive block 71. When the moving contact assembly 1 rotates along the first rotation direction, it first makes conductive contact with the conductive block 71 and forms a conductive circuit with the vacuum interrupter 5. Then, the moving contact assembly 1 continues to rotate along the first rotation direction to abut against the insulating member 72, and generates a pushing force on the insulating member 72 so that the insulating member 72 drives the swing assembly 6 to rotate counterclockwise, so that one end of the swing assembly 6 rotates downward to drive the movable end 51 of the vacuum interrupter 5 to move to extinguish the arc, while the other end of the swing assembly 6 rotates upward and engages with the clamping member 4. When the moving contact assembly 1 rotates along the second rotation direction, it makes insulated contact with the insulating member 72 and pushes the insulating member 72 to rotate counterclockwise around the swing assembly 6, so that the insulating member 72 abuts and pushes the clamping member 4 to overcome the force of the first elastic member 8 and move away from the mounting seat 3. In this structure, the conductive block 71 is made of conductive material and plays the role of current conduction and transmission connection. When the insulating part 72 rotates counterclockwise, it generates a force on the clamping part 4 and moves the clamping part 4 away from the mounting seat 3, so that the other end of the swing assembly 6 is disengaged from the clamping part 4 to complete the closing of the vacuum interrupter 5.

[0067] It should be noted that if Figure 6-Figure 7 As shown, the swing assembly 6 includes a transmission rod 61, the other end of the transmission rod 61 is provided with a rotation notch 613 and a stopper 614 provided on one side of the rotation notch 613, and the conductive block 71 is rotatably provided in the rotation notch 613. Since the insulating member 72 and the conductive block 71 are fixedly connected, when the moving contact assembly 1 pushes the insulating member 72 along the first rotation direction, the conductive block 71 is limited by the stopper 614. Therefore, the insulating member 72 and the conductive block 71 rotate simultaneously and can drive the swing assembly 6 to rotate counterclockwise after being limited; and when the moving contact assembly 1 is rotated along the first rotation direction, the conductive block 71 is limited by the stopper 614. When the insulating member 72 is rotated and pushed in the second rotation direction, the conductive block 71 rotates in the rotation notch 613 without being restricted by the swing assembly 6 and follows the insulating member 72 to rotate around the transmission rod 61. At this time, the transmission rod 61 remains engaged 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 swing assembly 6 is disengaged from the clamping member 4. After the transmission rod 61 of the swing assembly 6 is disengaged, the clamping member 4 is reset under the action of the first elastic member 8. It is understandable 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] Alternatively, as Figure 4As shown, a first arc surface 41 is provided at the lower end of the clip 4 away from the slide groove 31. Along the direction of movement of the clip 4 away from the mounting seat 3, the first arc surface 41 is inclined downward. When the insulating member 72 rotates counterclockwise, it can slide against the first arc surface 41, so that the clip 4 can move away from the mounting seat 3. This structural setting enables the insulating member 72 to realize the movement of the clip 4 away from the mounting seat 3 when it rotates counterclockwise, thereby realizing the disengagement of the other end of the swing assembly 6 from the clip 4.

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

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

[0071] Optionally, the insulating member 72 includes two insulating blocks 721 spaced apart and distributed on both sides of the conductive block 71. The conductive block 71 is sandwiched between the two insulating blocks 721. The two insulating blocks 721 are fixedly connected to the conductive block 71 via pins. When the movable contact assembly 1 rotates about the first rotational direction or the second rotational direction, the two blade arms 11 respectively abut against the two insulating blocks 721. By providing the insulating member 72 with two insulating blocks 721, the two blade arms 11 of the movable contact assembly 1 respectively push the two insulating blocks 721 to rotate, and the pushing force they receive is more uniform. When the moving contact assembly 1 rotates along the first rotation direction, the two knife arms 11 rotate toward the conductive block 71. As the conductive block 71 gradually enters between the two knife arms 11, the moving contact assembly 1 continues to rotate the conductive block 71 along the first rotation direction and then separates from the two knife arms 11. During this process, the conductive block 71 not only achieves conductive contact with the knife arms 11, but also guides the moving contact assembly 1, so that the two knife arms 11 can accurately abut the two insulating blocks 721, and the movement is more stable and reliable.

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

[0073] Optionally, refer to Figure 1 and Figure 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 base 3. One end of the transmission rod 61 is connected to the movable end 51 of the vacuum interrupter 5. The other end of the transmission rod 61 is used to engage with the clamping member 4. The second elastic member 62 elastically abuts against the mounting base 3. When the other end of the transmission rod 61 is engaged with the clamping member 4, the second elastic member 62 ensures a stable engagement between the transmission rod 61 and the clamping member 4. When the insulating member 72 pushes the clamping member 4 away from the mounting base 3, the second elastic member 62 causes the transmission rod 61 to rotate and reset, thereby driving the movable end 51 of the vacuum interrupter 5 to switch to the closed position.

[0074] Specifically, the other end of the transmission rod 61 is provided with a first hook 611, which is arranged away from the mounting seat 3. The clamping member 4 is provided with a second hook 42 extending toward the mounting seat 3. When the movable 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, thereby driving 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 is rotated into place, the clamping member 4 is reset under the force of the first elastic member 8, so that the first hook 611 is 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 clamping 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 slide and abut against each other, so that the first hook 611 drives the clamping member 4 to overcome the force of the first elastic member 8 and move away from the mounting seat 3.

[0076] Optionally, two spaced-apart connecting 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 connecting plates 331 , and the transmission rod 61 and the two connecting plates 331 are connected by a rotating shaft 63 .

[0077] In order to ensure that the conductive block 71 is in reliable contact with the two knife arms 11, a long slot hole 612 is provided at the other end of the transmission rod 61 of the swinging component 6, and the long slot hole 612 passes through the rotating notch 613. The conductive block 71 of the connecting component 7 is provided with a rotating pin 10, and the rotating pin 10 is arranged in the long slot hole 612, and a third elastic member 9 is connected between the rotating pin 10 and the transmission rod 61. In the natural state (that is, when the insulating member 72 is not subjected to the pushing force), the third elastic member 9 is used to make the rotating pin 10 be located in the long slot hole 612 on the side close to the mounting seat 3. When the moving contact assembly 1 rotates along the first rotation direction, when the knife arm 11 is in conductive contact with the conductive block 71, a certain amount of idle travel is reserved, that is, when the knife arm 11 abuts against the insulating block 721 to drive the conductive block 71 to rotate, the rotating pin 10 first overcomes the action of the third elastic member 9 and moves from the side of the long slot hole 612 close to the mounting seat 3 to the side of the long slot hole 612 away from the mounting seat 3. During this process, the transmission rod 61 does not rotate, which increases the conductive contact time between the conductive block 71 and the knife arm 11, ensuring that the current is reliably transferred to the conductive circuit of the vacuum arc chamber 5.

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

[0079] Refer again Figure 6 As shown, the load switch also includes a shell 30 and a busbar 20. The busbar 20 is arranged in the shell 30. The vacuum interrupter 5 is vertically connected to the busbar 20. 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 shell 30 is provided with a beam 301; the mounting seat 3 includes a main body 33 and an extension plate 34, the main body 33 is provided with a mounting groove 32, the main body 33 is connected to the beam 301, the vacuum arc chamber 5 is arranged in the mounting groove 32, and the moving end of the vacuum arc chamber 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 the end of the main body 33 away from the beam 301, and the extension plate 34 is provided with a slide groove 31. This structure realizes the installation and fixation of the mounting seat 3.

[0081] The load switch can realize reliable current transfer during the opening process. During the closing process, when the blade arm 11 of the moving contact assembly 1 pushes the insulating part 72, the moving contact assembly 1 first contacts the static contact 2, and then the first hook 611 and the second hook 42 are disengaged, so that the transmission rod 61 rotates and resets, and the vacuum interrupter 5 switches to the closing position, ensuring that the closing process is completed by the moving contact assembly 1, thereby improving the operation reliability.

[0082] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Those skilled in the art will appreciate that other variations or modifications can be made based on the above description. It is not necessary and impossible to enumerate all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. Load switch, characterized in that, It comprises a moving contact assembly (1), a mounting seat (3), a clamping piece (4), a vacuum interrupter (5) and a swing mechanism: The mounting seat (3) is provided with a slide groove (31), and the clamping member (4) is slidably engaged in the slide groove (31); The swing mechanism comprises a swing assembly (6) and a connecting assembly (7), the swing assembly (6) comprises 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 movable end (51) of the vacuum interrupter (5), the connecting assembly (7) is rotatably arranged on the other end of the transmission rod (61), a portion of the transmission rod (61) located between the one end and the other end thereof is rotatably connected to the mounting seat (3), and the second elastic member (62) elastically abuts against the mounting seat (3); The moving contact assembly (1) rotates along a first rotation direction and drives the connecting assembly (7) to drive the transmission rod (61) to rotate, one end of the transmission rod (61) drives the moving end (51) of the vacuum interrupter (5) to move, and the other end of the transmission rod (61) is engaged with the clamping member (4); The moving contact assembly (1) rotates along a second rotation direction and drives the connecting assembly (7) to rotate around the transmission rod (61), and the connecting assembly (7) drives the clamping member (4) to move so that the clamping member (4) is disengaged from the other end of the transmission rod (61); 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 provided in the sliding groove (31), the clamping member (4) is slidably engaged in the sliding groove (31) and is elastically connected to the mounting seat (3) via the first elastic member (8), and 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) comprises a conductive block (71) and an insulating member (72) connected to each other, and the conductive block (71) is rotatably connected to the other end of the swing assembly (6); The movable contact assembly (1) rotates along the first rotation direction and comes into conductive contact with the conductive block (71), and drives the insulating member (72) to drive the swing assembly (6) to rotate; the movable contact assembly (1) rotates along the second rotation direction and comes into insulated contact with the insulating member (72), and drives the insulating member (72) to rotate around the swing assembly (6), and 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 provided at the lower end of the clamping member (4) away from the sliding groove (31), and the insulating member (72) can slide against the first arc surface (41) when rotating around the swing assembly (6) to drive the clamping member (4) to move.

5. The load switch according to claim 3, characterized in that: The insulating member (72) comprises two insulating blocks (721) distributed at intervals, the conductive block (71) is sandwiched between the two insulating blocks (721), and the conductive block (71) and the two insulating blocks (721) are fixedly connected.

6. The load switch according to claim 3, characterized in that: The moving contact assembly (1) comprises two knife arms (11) spaced apart from each other, and when the two knife arms (11) rotate along the first rotation direction, the conductive block (71) passes through the space between the two knife arms (11) and respectively makes conductive contact with the two knife arms (11); 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 knife arm (11).

7. The load switch according to claim 5, characterized in that: The moving contact assembly (1) comprises two knife arms (11) spaced apart from each other. The two knife 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 knife 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 stopper (614) provided on one side of the rotation notch (613), and the conductive block (71) is rotatably provided in the rotation notch (613); When the movable contact assembly (1) rotates along the first rotation direction and abuts against the insulating member (72), the conductive block (71) abuts against the stopper (614), so that the insulating member (72) drives the swing assembly (6) to rotate; When the movable contact assembly (1) moves 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 other end of the swing assembly (6) is provided with a first hook (611), and the clamping member (4) is provided with a second hook (42). When the connecting assembly (7) drives the swing assembly (6) to rotate, the first hook (611) is clamped on the second hook (42).

10. The load switch according to claim 9, characterized in that: The first hook (611) is provided with a second arc surface (6111) at the upper end facing the clamping member (4), and the second hook (42) is provided with a third arc surface (421) at the lower end facing the swing assembly (6), and the second arc surface (6111) and the third arc surface (421) are convex towards each other; When the connecting component (7) drives the swinging component (6) to rotate, the second arc surface (6111) slides and 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).

11. The load switch according to claim 1, characterized in that: Two spaced-apart connecting plates (331) are provided at the lower portion of the mounting seat (3); a portion of the transmission rod (61) located between one end and the other end thereof is clamped between the two connecting plates (331); and the transmission rod (61) and the two connecting plates (331) are connected via a rotating shaft (63).

12. The load switch according to claim 1, characterized in that: The other end of the swing assembly (6) is provided with a long slot hole (612), and 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) be located on a side of the long slot hole (612) close to the mounting seat (3).

13. The load switch according to claim 1, characterized in that: The load switch further comprises a housing (30), wherein a crossbeam (301) is provided in the housing (30); The mounting seat (3) comprises: A main body (33) is provided with a mounting groove (32), the main body (33) is connected to the crossbeam (301), the vacuum interrupter (5) is arranged in the mounting groove (32), and the movable 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 provided at one end of the main body (33) away from the crossbeam (301), the extension plate (34) is provided with the slide groove (31), and the clamping member (4) is slidably engaged in the slide groove (31).

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