A switch linkage mechanism with no-travel and a switch

Abstract

This utility model relates to the field of low-voltage electrical technology, and in particular to a switch linkage mechanism and switch with a free travel. The switch linkage mechanism with a free travel provided by this utility model includes: a limit swing arm, a parallel pre-charge circuit, and a main switch; the limit swing arm is provided with a stop portion, the pre-charge circuit is provided with a pre-charge handle, a pre-charge stationary contact, and a pre-charge moving contact, and the main switch is provided with a main handle; the pre-charge handle includes a moving contact bracket and a trigger bracket, the back of the moving contact bracket is provided with a connecting groove, the trigger bracket is provided with a second protrusion, and the trigger bracket is movably connected to the connecting groove through the second protrusion; the limit swing arm is drively connected to the trigger bracket. When the main handle is in the opening movement, the limit swing arm can move towards the second position direction and drive the second protrusion of the trigger bracket to move along the extension direction of the connecting groove, generating a free travel, which not only keeps the limit swing arm outside the opening and closing movement path of the main handle, but also prevents the moving contact bracket from moving.

Description

Technical Field

[0001] This utility model relates to the field of low-voltage electrical technology, and in particular to a switch linkage mechanism and switch with a free travel. Background Technology

[0002] Switches can switch between closed and open states to control the conduction and disconnection of circuits. However, in existing technology, switches have a high voltage difference between their input and output terminals before closing, and there is also a relatively large capacitance in the system. If the switch is closed directly, a large inrush current will occur, which can cause damage to the switch and system safety accidents. Utility Model Content

[0003] The purpose of this utility model is to provide a switch linkage mechanism and switch with no-travel, so as to solve the technical problem in the prior art that the input and output terminals of the switch have a high voltage difference before closing, and there is also a relatively large capacitance in the system. If the switch is closed directly, there will be a large inrush current, which will cause switch damage and system safety accidents.

[0004] In a first aspect, this utility model provides a switch linkage mechanism with a free travel, comprising: a limiting swing arm, a pre-charge circuit connected in parallel, and a main switch, wherein the pre-charge circuit is disposed on the main switch; The limiting swing arm is provided with a stop part, the pre-charge circuit is provided with a pre-charge handle, a pre-charge stationary contact and a pre-charge moving contact provided on the pre-charge handle, and the main switch is provided with a main handle; The precharge handle includes a moving contact bracket and a trigger bracket. The back of the moving contact bracket is provided with a connecting groove extending along the opening and closing direction of the precharge handle. The trigger bracket is provided with a second protrusion. The trigger bracket is movably connected to the connecting groove through the second protrusion and can move along the extending direction of the connecting groove to generate a free stroke. The limiting swing arm is drivenly connected to the trigger bracket, and the precharge handle can drive the limiting swing arm to swing through the opening and closing of the circuit. When the precharge handle is in the open position, the limiting arm is in the first position, and the stop is located on the opening and closing movement path of the main handle to limit the closing of the main handle; When the precharge handle is in the closed position, the limiting arm is in the second position, and the stop is located outside the opening and closing movement path of the main handle so that the main handle can close the circuit. When the main handle is in the closed position, the second protrusion can move in the opening and closing direction of the precharge handle. When the main handle moves to the open position, the limiting swing arm moves, and the limiting swing arm drives the trigger bracket to move, so that the second protrusion moves in the connecting groove to generate a free stroke.

[0005] In an optional embodiment, a movable unlocking structure is further included, and the movable unlocking structure has an unlocking position and a locking position. The movable unlocking structure is provided with a first limiting part and an unlocking part. The precharge handle is provided with a second limiting part that cooperates with the first limiting part. The unlocking part is located on the opening and closing movement path of the main handle, and when the main handle is closed, the movable unlocking structure can be switched from the locking position to the unlocking position through the unlocking part. When the precharge handle is in the open position, the active unlocking structure is in the unlocked position, and the first limiting part and the second limiting part are separated and in the unlocked state, so that the precharge handle can be closed, thereby driving the limiting swing arm to swing along the direction from the first position to the second position; When the precharge handle is in the closed position, the active unlocking structure is in the locked position, and the first limiting part and the second limiting part are connected and locked to restrict the precharge handle from opening, thereby restricting the swing arm from swinging from the second position to the first position.

[0006] In an optional implementation, the active unlocking structure includes a release lever and a linkage; One end of the release lever forms the unlocking part, and the other end is connected to the linkage component. The linkage component is provided with the first limiting part.

[0007] In an optional embodiment, a buffer guide slope is provided between the first limiting part and the second limiting part. The buffer guide slope is used to provide a buffer distance and guidance for the first limiting part and the second limiting part before they enter the locked state from the unlocked state.

[0008] In an optional embodiment, a second return spring is further included for providing the active unlocking structure with a kinetic force in the direction from the unlocked position to the locked position.

[0009] In an optional embodiment, the stop portion is provided with a stop surface on the side facing the open position of the main handle for restricting the closing of the main handle, and the stop portion is provided with an inclined surface on the side facing the closed position of the main handle for enabling the main handle to open. The limiting arm also has a third position by swinging, and the third position is located between the first position and the second position. When the main handle is opened, the limiting arm can swing from the first position to the third position through the inclined surface. As the limiting arm swings from the first position to the third position, it drives the trigger bracket to move along the extension direction of the connecting groove, generating a free stroke.

[0010] In an optional embodiment, the precharge handle further includes a toggle element; The actuating element is fixedly connected to the front of the moving contact bracket, and the pre-charged moving contact is installed on the upper and lower sides of the moving contact bracket.

[0011] In an optional embodiment, the second limiting portion is disposed on the trigger bracket.

[0012] In an optional implementation, a first reset spring is also included for providing the precharge handle with a force of motion in the opening direction.

[0013] Secondly, this utility model provides a switch, including the switch linkage mechanism with no-travel as described in any of the foregoing embodiments.

[0014] Compared with the prior art, the technical advantages of the switch linkage mechanism and switch with no-travel provided by this utility model are as follows: This utility model provides a switch linkage mechanism with a free travel, comprising: a limit swing arm, a pre-charge circuit connected in parallel, and a main switch, wherein the pre-charge circuit is disposed on the main switch; the limit swing arm is provided with a stop portion, the pre-charge circuit is provided with a pre-charge handle, a pre-charge stationary contact, and a pre-charge moving contact disposed on the pre-charge handle, and the main switch is provided with a main handle; the pre-charge handle includes a moving contact bracket and a trigger bracket, the back of the moving contact bracket is provided with a connecting groove extending along the opening and closing direction of the pre-charge handle, the trigger bracket is provided with a second protrusion, the trigger bracket is movably connected to the connecting groove through the second protrusion, and can move along the extending direction of the connecting groove to generate a free travel, the limit swing arm and the contact... The precharge handle is connected to the main handle via a drive mechanism, and the precharge handle can drive the limit arm to swing through the opening and closing mechanism. When the precharge handle is in the open position, the limit arm is in the first position, and the stop is located on the opening and closing movement path of the main handle to limit the main handle from closing. When the precharge handle is in the closed position, the limit arm is in the second position, and the stop is located outside the opening and closing movement path of the main handle to allow the main handle to close. When the main handle is in the closed position, the second protrusion can move in the opening and closing direction of the precharge handle. When the main handle moves to the open position, the limit arm moves, and the limit arm drives the trigger bracket to move, causing the second protrusion to move in the connecting groove to generate a free stroke.

[0015] A pre-charge circuit is added, and this circuit is connected in parallel with the main switch. When the pre-charge handle is in the open position, the limit arm is in the first position, and the stop is located on the opening and closing movement path of the main handle, limiting the main switch from closing and preventing damage to the main switch from a large inrush current. When the main switch needs to close, the pre-charge handle is closed first to pre-charge the capacitor, reducing the voltage difference between the switch input and output terminals. When the pre-charge handle is in the closed position, the stop is located outside the opening and closing movement path of the main handle, thus releasing the limit on the main handle and allowing the main switch to close. Due to the absence of a large inrush current, the safety of the power supply system is effectively improved. Simultaneously, when the main handle is open, the limit arm can move towards the second position and drive the second protrusion of the trigger bracket to move along the extension direction of the connecting groove, generating a free stroke. This ensures that the limit arm is located outside the opening and closing movement path of the main handle, allowing the main handle to open, while also preventing movement of the moving contact bracket, thus preventing the pre-charge handle from closing.

[0016] The switch provided by this utility model includes the aforementioned switch linkage mechanism with free travel. Therefore, the technical advantages and effects achieved by this switch linkage mechanism include those achieved by the aforementioned switch linkage mechanism with free travel, which will not be elaborated here.

[0017] Other features and advantages of this invention will be described in detail in the following detailed description section. 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 A schematic diagram of the switch structure provided in an embodiment of this utility model; Figure 2 A schematic diagram of the structure when the precharge handle is in the open position and the main handle is in the open position, as provided in this embodiment of the utility model; Figure 3 A schematic diagram of the structure when the precharge handle is in the closed position and the main handle is in the open position, as provided in this embodiment of the utility model; Figure 4 A schematic diagram illustrating the cooperation between the pre-charge handle, the limiting swing arm, and the linkage components provided in this embodiment of the utility model; Figure 5 This is a schematic diagram of the structure when the precharge handle is in the open position and the main handle is in the closed position, as provided in an embodiment of this utility model.

[0020] Icons: 1-Limiting swing arm; 2-Stop part; 3-Pre-charge handle; 4-Main handle; 5-Limiting groove; 6-Unlocking part; 7-Limiting protrusion; 8-Trigger lever; 9-Linking component; 10-Buffer guide slope; 11-Second return spring; 12-Stop straight surface; 13-Slope; 14-Toggle component; 15-Moving contact bracket; 16-Trigger bracket; 17-First return spring; 18-Intermediate hole; 19-Fixed shaft; 20-Oval hole; 21-Bend; 22-Mounting groove; 23-Pre-charge moving contact; 24-Pre-charge stationary contact; 25-Guide shaft; 26-Long groove; 27-Connecting shaft; 28-Fixed hole; 29-Second protrusion; 30-Connecting groove. 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] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and 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, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0023] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" 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 mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0024] Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0025] The present invention will be further described in detail below through specific embodiments and in conjunction with the accompanying drawings.

[0026] The specific structure is as follows: Figures 1 to 5 As shown.

[0027] This embodiment provides a switch linkage mechanism with a no-travel function, including: a limit swing arm 1, a pre-charge circuit and a main switch connected in parallel, wherein the pre-charge circuit is disposed on the main switch; the limit swing arm 1 is provided with a stop part 2, the pre-charge circuit is provided with a pre-charge handle 3, a pre-charge stationary contact 24 and a pre-charge moving contact 23 disposed on the pre-charge handle 3, the main switch is provided with a main handle 4, and the pre-charge handle 3, the pre-charge stationary contact 24 and the pre-charge moving contact 23 are all located on the same side of the main handle 4; the pre-charge handle 3 includes a moving contact bracket 15 and a trigger bracket 16, the back of the moving contact bracket 15 is provided with a connecting groove 30 extending along the opening and closing direction of the pre-charge handle 3, and the trigger bracket... The trigger bracket 16 is provided with a second protrusion 29. The trigger bracket 16 is movably connected to the connecting groove 30 through the second protrusion 29 and can move along the extension direction of the connecting groove 30 to generate a free stroke. The limit swing arm 1 is connected to the trigger bracket 16 through transmission. The precharge handle 3 can drive the limit swing arm 1 to swing through the opening and closing of the circuit. When the precharge handle 3 is in the open position, the limit swing arm 1 is in the first position, and the stop part 2 is located on the opening and closing movement path of the main handle 4 to limit the main handle 4 from closing. When the precharge handle 3 is in the closed position, the limit swing arm 1 is in the second position, and the stop part 2 is located outside the opening and closing movement path of the main handle 4 so that the main handle 4 can close.

[0028] In this embodiment, a pre-charge circuit is added, and the pre-charge circuit is connected in parallel with the main switch. When the pre-charge handle 3 is in the open position, the limit arm 1 is in the first position, and the stop part 2 is located on the opening and closing movement path of the main handle 4 to limit the main handle 4, restricting the main switch from closing and avoiding damage to the main switch by a large inrush current. When the main switch needs to be closed, the pre-charge handle 3 is closed first to pre-charge the capacitor, so that the voltage difference between the input and output terminals of the switch is reduced. When the pre-charge handle 3 is in the closed position, the stop part 2 is located outside the opening and closing movement path of the main handle 4, thereby releasing the limit on the main handle 4 and allowing the main switch to be closed. Since there is no large inrush current, the safety of the power supply system is effectively improved. At the same time, when the main handle 4 is in the opening and closing movement, the limit arm 1 can move towards the second position and drive the second protrusion 29 of the trigger bracket 16 to move along the extension direction of the connecting groove 30 to generate a free stroke. This can both keep the limit arm 1 outside the opening and closing movement path of the main handle 4 so that the main handle 4 can open the circuit and prevent the moving contact bracket 15 from moving, thereby preventing the precharge handle 3 from closing the circuit.

[0029] In this embodiment, the opening and closing of the precharge handle 3 drives the limit arm 1 to swing, so that the stop part 2 locks and unlocks the main handle 4. The structure is simple and easy to use, which can reduce the wiring of users.

[0030] In the optional technical solution of this embodiment, a movable unlocking structure is also included. The movable unlocking structure has an unlocking position and a locking position. The movable unlocking structure is provided with a first limiting part and an unlocking part 6. The precharge handle 3 is provided with a second limiting part that cooperates with the first limiting part. The unlocking part 6 is located on the opening and closing movement path of the main handle 4. When the main handle 4 closes, the movable unlocking structure can be switched from the locking position to the unlocking position through the unlocking part 6. When the precharge handle 3 is in the opening position, the movable unlocking structure is in the unlocking position. The first limiting part and the second limiting part are separated and in the unlocked state, so that the precharge handle 3 can close and drive the limiting swing arm 1 to swing along the direction from the first position to the second position. When the precharge handle 3 is in the closing position, the movable unlocking structure is in the locking position. The first limiting part and the second limiting part are connected and in the locked state, so as to restrict the opening of the precharge handle 3 and thus restrict the swing of the limiting swing arm 1 along the direction from the second position to the first position.

[0031] In this embodiment, the stop part 2 is located near the open position of the main handle 4, which can limit the main handle 4 to the open position. The unlocking part 6 is located near the closed position of the main handle 4, which can switch the active unlocking structure from the locked position to the unlocked position when the main handle 4 is closed. Specifically, when the precharge handle 3 switches from the open position to the closed position, the movable unlocking structure switches from the unlocked position to the locked position. The first limit part and the second limit part switch from the separated unlocked state to the connected locked state. The precharge handle 3 is locked by the movable unlocking structure, keeping the precharge handle 3 in the closed position. This keeps the limit swing arm 1 in the second position, ensuring that the precharge circuit is in the charging state. At this time, the main switch can be closed. During the closing process, the main handle 4 moves from the open position to the closed position and passes through the unlocking part 6. The main handle 4 drives the unlocking part 6 to move, thereby switching the movable unlocking structure from the locked position to the unlocked position. At this time, the precharge handle 3 can be opened, thereby driving the limit swing arm 1 to swing from the second position to the first position. When the main handle 4 is in the closed position, the movable unlocking structure is always kept in the unlocked position through the unlocking part 6. Since the precharge handle 3 is unlocked after the main handle 4 is in the closed position, the precharge handle 3 is kept in the closed state before the main handle 4 is in the closed position, avoiding interference from the stop part 2 of the limit swing arm 1 to the main handle 4 during the closing movement.

[0032] In this embodiment, the first limiting part can be a limiting groove 5 and the second limiting part can be a limiting protrusion 7; or the first limiting part can be a limiting protrusion 7 and the second limiting part can be a limiting groove 5.

[0033] In the optional technical solution of this embodiment, the active unlocking structure includes a release lever 8 and a linkage 9; one end of the release lever 8 forms an unlocking part 6, and the other end is connected to the linkage 9; a first limiting part is provided on the linkage 9.

[0034] In this embodiment, a central hole 18 is provided in the middle of the release lever 8, and the central hole 18 is connected to a fixed shaft 19. The release lever 8 swings through the fixed shaft 19. A waist-shaped hole 20 is provided at the end of the release lever 8 connected to the linkage 9. The release lever 8 is provided with a guide shaft 25, which is located in the waist-shaped hole 20. The release lever 8 is connected to the linkage 9 through the waist-shaped hole 20 and the guide shaft 25. The shape of the waist-shaped hole 20 provides space for the rotation of the release lever 8. A bend 21 is provided at the edge of the release lever 8 corresponding to the linkage 9 to reduce space occupation.

[0035] In the optional technical solution of this embodiment, a buffer guide slope 10 is provided between the first limiting part and the second limiting part. The buffer guide slope 10 is used to provide a buffer distance and guidance for the first limiting part and the second limiting part before they enter the locked state from the unlocked state. This allows the first limiting part and the second limiting part to pass through a buffer distance before entering the locked state, preventing direct switching. Simultaneously, the guiding effect prevents switching jams and ensures the stability of the switching.

[0036] In the optional technical solution of this embodiment, a second return spring 11 is also included for providing the active unlocking structure with a moving force in the direction from the unlocked position to the locked position.

[0037] In this embodiment, the first limiting part is the limiting groove 5, and the second limiting part is the limiting protrusion 7. When the limiting arm 1 is not in the first position or the second position, the limiting protrusion 7 can abut against the buffer guide slope 10, so that the second return spring 11 is in a compressed state. When the limiting arm 1 is in the second position, the second return spring 11 can drive the movable unlocking structure to move from the unlocking position to the locking position. The overall structure is simple, the movable unlocking structure is easy to drive, and the stability is high.

[0038] Specifically, the linkage 9 is provided with a mounting groove 22, and the second reset spring 11 is provided in the mounting groove 22 to provide the linkage 9 with a force in the opposite direction to the direction in which the trip lever 8 drives the linkage 9 to move.

[0039] In the optional technical solution of this embodiment, the stop part 2 is provided with a stop surface 12 for limiting the closing of the main handle 4 on the side facing the opening position of the main handle 4, and an inclined surface 13 for enabling the main handle 4 to open on the side facing the closing position of the main handle 4; the limiting swing arm 1 also has a third position by swinging, and the third position is located between the first position and the second position. When the main handle 4 moves to open, the limiting swing arm 1 can swing from the first position to the third position through the inclined surface 13; during the process of the limiting swing arm 1 swinging from the first position to the third position, it drives the trigger bracket 16 to move along the extension direction of the connecting groove 30 to generate a free stroke.

[0040] In this embodiment, when the main handle 4 is in the open position, the stop surface 12 limits the main handle 4 to prevent it from moving towards the closed position, thus achieving a good limiting effect. When the main handle 4 is in the opening process, before moving from the closing position to the opening position, the main handle 4 passes through the stop part 2 and contacts the inclined surface 13 of the stop part 2. After the main handle 4 contacts the inclined surface 13, if the opening continues, the main handle 4 will push the limit swing arm 1 to swing through the inclined surface 13 and exit the opening and closing movement path of the main handle 4 to avoid affecting the opening of the main handle 4. At the same time, the farthest position pushed by the main handle 4 to swing the limit swing arm 1 through the contact of the main handle 4 with the inclined surface 13 is the third position. When the limit swing arm 1 is in the third position, the precharge handle 3 will not switch from the opening position to the closing position. The active unlocking structure is in the unlocked position, and the first limit part and the second limit part are in the unlocked state. At this time, the limit swing arm 1 can swing along the direction from the second position to the first position. When the main handle 4 moves to the opening position, the precharge handle 3 can drive the limit swing arm 1 to swing along the direction from the second position to the first position, so that the limit swing arm 1 is in the first position, and the stop part 2 continues to limit the main handle 4.

[0041] In the optional technical solution of this embodiment, the precharge handle 3 further includes a toggle member 14; the toggle member 14 is fixedly connected to the front of the moving contact bracket 15, and precharge moving contacts 23 are installed on the upper and lower sides of the moving contact bracket 15. The precharge moving contacts 23 can be opened and closed with the precharge stationary contacts 24 installed on the main switch under the drive of the moving contact bracket 15. There is a free stroke between the moving contact bracket 15 and the trigger bracket 16; the limit swing arm 1 is drivenly connected to the trigger bracket 16. One end of the limit swing arm 1 has a long groove 26, and the trigger bracket 16 is provided with a first protrusion located in the long groove 26. The first protrusion can also be formed by the connecting shaft 27. The limit swing arm 1 and the trigger bracket 16 are drivenly connected through the first protrusion and the long groove 26. The limit swing arm 1 is fixedly connected to the main switch through the fixing hole 28 at the other end. The limit swing arm 1 can rotate around the fixing hole 28.

[0042] When the main handle 4 is in the closed position, the second protrusion 29 can move in the opening and closing direction of the precharge handle 3. When the main handle 4 moves to the open position, the limit arm 1 moves, and the limit arm 1 drives the trigger bracket 16 to move, causing the second protrusion 29 to move within the connecting groove 30 and generate a free stroke, so the moving contact bracket 15 does not move. This means that the precharge handle 3 can only be closed when the toggle member 14 is moved.

[0043] In this embodiment, during the process of pushing the limit arm 1 to swing by the contact between the main handle 4 and the inclined surface 13, the trigger bracket 16 can move relative to the moving contact bracket 15 in the direction of opening and closing of the precharge handle 3, so that the swing of the limit arm 1 causes the trigger bracket 16 to move only relative to the moving contact bracket 15, while the moving contact bracket 15 and the toggle member 14 remain stationary.

[0044] In this optional embodiment, the second limiting part is disposed on the trigger bracket 16. This results in high integration, making the overall structure compact and space-saving. However, this embodiment is not limited to this; the second limiting part can also be disposed independently on the moving contact bracket 15.

[0045] In the optional technical solution of this embodiment, a first reset spring 17 is also included for providing the precharge handle 3 with a force for movement in the opening direction.

[0046] In this embodiment, when the precharge handle 3 is unlocked from the locked state by the active unlocking structure, the precharge handle 3 can automatically open the circuit breaker via the first reset spring 17. Furthermore, during the opening process of the main handle 4, as it drives the limiting arm 1 from the first position to the third position, the first reset spring 17 is gradually compressed. When the main handle 4 moves to the open position, the first reset spring 17 drives the limiting arm 1 from the third position to the first position via the trigger bracket 16. The structure is simple, the drive is stable, and the reset is convenient. The first reset spring 17 acts on the trigger bracket 16.

[0047] The switch provided in this embodiment includes the switch linkage mechanism with the above-mentioned free travel. Therefore, the technical advantages and effects achieved by the switch include those achieved by the switch linkage mechanism with the above-mentioned free travel, which will not be repeated here.

[0048] 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 switch linkage mechanism with a no-travel period, characterized in that, include: Limiting swing arm (1), a pre-charge circuit and a main switch connected in parallel, wherein the pre-charge circuit is set on the main switch; The limiting swing arm (1) is provided with a stop part (2), the pre-charge circuit is provided with a pre-charge handle (3), a pre-charge stationary contact (24) and a pre-charge moving contact (23) provided on the pre-charge handle (3), and the main switch is provided with a main handle (4). The precharge handle (3) includes a moving contact bracket (15) and a trigger bracket (16). The back of the moving contact bracket (15) is provided with a connecting groove (30) extending along the opening and closing direction of the precharge handle (3). The trigger bracket (16) is provided with a second protrusion (29). The trigger bracket (16) is movably connected to the connecting groove (30) through the second protrusion (29) and can move along the extending direction of the connecting groove (30) to generate a free stroke. The limiting swing arm (1) is connected to the trigger bracket (16) in a transmission, and the precharge handle (3) can drive the limiting swing arm (1) to swing through the opening and closing of the circuit. When the precharge handle (3) is in the open position, the limit swing arm (1) is in the first position, and the stop part (2) is located on the opening and closing movement path of the main handle (4) to limit the closing of the main handle (4); When the precharge handle (3) is in the closed position, the limit swing arm (1) is in the second position, and the stop part (2) is outside the opening and closing movement path of the main handle (4) so ​​that the main handle (4) can close. When the main handle (4) is in the closed position, the second protrusion (29) can move in the opening and closing direction of the precharge handle (3). When the main handle (4) moves to the open position, the limiting arm (1) moves, and the limiting arm (1) drives the trigger bracket (16) to move, so that the second protrusion (29) moves in the connecting groove (30) to generate a free stroke.

2. The switch linkage mechanism with idle travel according to claim 1, characterized in that, It also includes an active unlocking structure, which has an unlocking position and a locking position. The active unlocking structure is provided with a first limiting part and an unlocking part (6). The precharge handle (3) is provided with a second limiting part that cooperates with the first limiting part. The unlocking part (6) is located on the opening and closing movement path of the main handle (4). When the main handle (4) is closed, the active unlocking structure can be switched from the locking position to the unlocking position through the unlocking part (6). When the precharge handle (3) is in the open position, the active unlocking structure is in the unlocking position, and the first limiting part and the second limiting part are separated and in the unlocked state, so that the precharge handle (3) can be closed, thereby driving the limiting swing arm (1) to swing along the direction from the first position to the second position; When the precharge handle (3) is in the closed position, the active unlocking structure is in the locked position, and the first limiting part and the second limiting part are connected and locked to restrict the precharge handle (3) from opening, thereby restricting the swing arm (1) from swinging from the second position to the first position.

3. The switch linkage mechanism with idle travel according to claim 2, characterized in that, The active unlocking structure includes a release lever (8) and a linkage (9); One end of the release lever (8) forms the unlocking part (6), and the other end is connected to the linkage (9). The first limiting part is provided on the linkage component (9).

4. The switch linkage mechanism with idle travel according to claim 3, characterized in that, A buffer guide slope (10) is provided between the first limiting part and the second limiting part. The buffer guide slope (10) is used to provide a buffer distance and guidance for the first limiting part and the second limiting part before they enter the locked state from the unlocked state.

5. The switch linkage mechanism with idle travel according to claim 4, characterized in that, It also includes a second return spring (11) for providing a force to the active unlocking structure in the direction from the unlocked position to the locked position.

6. The switch linkage mechanism with idle travel according to claim 1, characterized in that, The stop part (2) is provided with a stop surface (12) on the side facing the opening position of the main handle (4) to restrict the closing of the main handle (4), and the stop part (2) is provided with an inclined surface (13) on the side facing the closing position of the main handle (4) to enable the main handle (4) to open. The limiting arm (1) also has a third position by swinging, and the third position is located between the first position and the second position. When the main handle (4) is in the opening movement, the limiting arm (1) can swing from the first position to the third position through the inclined surface (13). As the limiting arm (1) swings from the first position to the third position, it drives the trigger bracket (16) to move along the extension direction of the connecting groove (30) to generate a free stroke.

7. The switch linkage mechanism with idle travel according to claim 1, characterized in that, The precharge handle (3) also includes a toggle element (14). The actuating element (14) is fixedly connected to the front of the moving contact bracket (15), and the pre-charge moving contact (23) is installed on the upper and lower sides of the moving contact bracket (15).

8. The switch linkage mechanism with idle travel according to claim 2, characterized in that, The second limiting part is disposed on the trigger bracket (16).

9. The switch linkage mechanism with idle travel according to claim 1, characterized in that, It also includes a first reset spring (17) for providing a force to the precharge handle (3) in the direction of opening.

10. A switch, characterized in that, Includes the switch linkage mechanism with no-travel as described in any one of claims 1-9.

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