Switch operating mechanism with fusion welding protection function and switch electric appliance

Abstract

The application discloses a switch operating mechanism with a fusion welding protection function and a switch electric appliance. The switch operating mechanism comprises a transmission group, a driving lever, a connecting rod assembly, a main shaft assembly and a limiting structure. The driving lever, the connecting rod assembly and the main shaft assembly are rotatably arranged and sequentially connected between a driving source and a contact system to form a transmission route. The limiting structure is arranged on the transmission route and used for limiting the driving lever. A transmission auxiliary part is provided with elasticity and is arranged in an extensible mode. When the contact system is in a fusion welding state, the main shaft assembly and the connecting rod assembly connected with the contact system are in a fixed state, and the driving lever is limited in cooperation with the connecting rod assembly and the main shaft assembly through the limiting structure. The switch operating mechanism with the fusion welding protection function and the switch electric appliance can limit the opening operation when the switch electric appliance is in the fusion welding state, so that the protection effect in the fusion welding state is realized, and the operation risk is reduced.

Description

Technical Field

[0001] This application belongs to the field of electrical equipment technology, and in particular relates to a switch operating mechanism and switch electrical appliance with fusion welding protection function. Background Technology

[0002] Switchgear typically controls the on / off state of a circuit by closing and opening contacts. When the circuit is closed, there may be a situation where the current in the circuit is too high. This situation can cause the contacts of the switchgear to weld together, making it impossible for the contacts to separate at the contact point. The switchgear will always remain conductive. This is the welded state of the switchgear.

[0003] In the fused state, the operating handle of the switchgear can still be rotated to the open position. However, since the contacts cannot separate at the contact point, the operator may mistakenly judge that the switchgear is in the open state when observing the operating handle from the outside, and perform normal use or maintenance operations, which brings great risks to the products connected to the power system and the operators. Utility Model Content

[0004] This application provides a switch operating mechanism and switchgear with fusion welding protection function, which can restrict the opening operation when the switchgear is in a fusion welding state, so as to achieve the protection effect in the fusion welding state and reduce the operation risk.

[0005] This application provides a switch operating mechanism with fusion welding protection function, comprising a transmission assembly including a drive lever, a connecting rod assembly, a main shaft assembly, and a limiting structure. The drive lever, connecting rod assembly, and main shaft assembly are rotatably arranged and sequentially connected to a drive source and a contact system to form a transmission path from the drive lever and connecting rod assembly to the main shaft assembly. The limiting structure is disposed on the transmission path to limit the drive lever. A transmission auxiliary component is also provided, which is elastic and retractably connected between the drive lever and the connecting rod assembly. When the contact system is in a fusion welding state, the main shaft assembly and connecting rod assembly connected to the contact system are both in a fixed state, and the drive lever is limited by the limiting structure in a limiting engagement with the connecting rod assembly and the main shaft assembly.

[0006] The switch operating mechanism with welding protection function described above includes a drive lever, a connecting rod assembly, and a main shaft assembly arranged sequentially and connected in a transmission manner along a first direction. The main shaft assembly includes a main shaft drive member and a main shaft driven member arranged at intervals along a second direction and rotating synchronously. The main shaft drive member is connected in a transmission manner to the connecting rod assembly, and the main shaft driven member is used to connect to the contact head system. The first direction and the second direction are intersecting.

[0007] The switch operating mechanism with welding protection function described above includes a spindle assembly that further includes a rotating shaft and a connecting shaft extending along a second direction. The spindle drive and spindle driven are arranged sequentially along the second direction and can be rotatably mounted on the outer circumferential surface of the rotating shaft. The connecting shaft is arranged parallel to the rotating shaft and connected between the spindle drive and the spindle driven.

[0008] The switch operating mechanism with welding protection function described above includes a spindle assembly that also includes a fixed bracket. The fixed bracket includes two mounting plates that are spaced apart and fixedly connected along a second direction. The connecting rod assembly and the spindle drive are mounted between the two mounting plates, and the spindle driven is mounted on the side of one of the mounting plates facing away from the other mounting plate.

[0009] The switch operating mechanism with welding protection function described above includes a drive lever comprising a rotating connection part and a drive connection part. The rotating connection part and the main shaft driven member are rotatably arranged in the same plane perpendicular to the second direction. The drive connection part extends along the second direction and is fixedly connected to the transmission auxiliary member.

[0010] In the above-mentioned switch operating mechanism with welding protection function, the limiting structure is provided on the spindle driven member of the spindle assembly and protrudes toward the rotating connection part. The rotating connection part includes a first limiting part protruding toward the limiting structure. The limiting structure includes a first limiting surface and a second limiting surface with an acute angle. When the contact system is in the welding state, the rotating connection part can rotate until its first limiting part abuts against the first limiting surface.

[0011] The switch operating mechanism with welding protection function described above includes a limiting structure comprising a main spindle limiting member and an auxiliary limiting member. The main spindle limiting member is disposed on the main spindle driven member of the main spindle assembly and protrudes toward the auxiliary limiting member. The main spindle limiting member is spaced apart from the rotating connection part. The auxiliary limiting member is rotatably disposed on one side of the rotating connection part and the main spindle driven member. The auxiliary limiting member includes a limiting main body part abutting against the rotating connection part and an auxiliary limiting part corresponding to the main spindle driven member. The projection of the main spindle limiting member in a plane perpendicular to the second direction is fan-shaped. The auxiliary limiting part is recessed into the surface of the limiting main body part, and the groove shape of the auxiliary limiting part is adapted to the shape of the main spindle limiting member. When the contact system is in a welding state, the auxiliary limiting member can rotate until its auxiliary limiting part abuts against the main spindle limiting member.

[0012] The switch operating mechanism with welding protection function described above includes a limiting structure located on the drive lever. The linkage assembly includes an upper linkage and a lower linkage that are rotatably connected. The transmission auxiliary component is connected between the rotatable connection point of the upper linkage and the lower linkage and the drive connection part. The lower linkage is also rotatably connected to the main shaft drive component. When the contact system is in the welding state, the drive lever can rotate until its limiting structure abuts against the upper linkage or the lower linkage.

[0013] In the above-described switch operating mechanism with welding protection function, the limiting structure protrudes from the rotating connection part along the second direction, and the upper connecting rod has a connecting rod limiting part protruding towards the limiting structure. When the contact system is in the welding state, the drive lever can rotate until its limiting structure abuts against the connecting rod limiting part; or, the limiting structure protrudes from the rotating connection part along the second direction, and the lower connecting rod includes a connecting rod body and a connecting rod extension connected together. The two ends of the connecting rod body are rotatably connected to the rotating connection point and the main shaft drive member, respectively. The connecting rod extension is connected to the end of the connecting rod body located at the rotating connection point. When the contact system is in the welding state, the drive lever can rotate until its limiting structure abuts against the connecting rod extension.

[0014] In the above-mentioned switch operating mechanism with fusion welding protection function, the limiting structure is provided on the linkage assembly and extends along the second direction. The driving lever includes two rotating connecting parts arranged parallel to each other along the second direction. When the contact system is in the fusion welding state, both rotating connecting parts can rotate to abut against the limiting structure of the linkage assembly.

[0015] The switch operating mechanism with welding protection function described above includes a linkage assembly comprising two limiting structures extending in opposite directions along a second direction. The two limiting structures are respectively arranged in correspondence with two rotating connecting parts, and each rotating connecting part has a second limiting part arranged opposite to the position of the corresponding limiting structure; or, the limiting structure is an axial structure extending along the second direction, and the extension length of the limiting structure covers the interval distance between the two rotating connecting parts.

[0016] On the other hand, this application embodiment also provides a switching device, which includes the above-mentioned switch operating mechanism with welding protection function. The switching device also includes a contact system, which is connected to the main shaft assembly of the switch operating mechanism.

[0017] When the switch operating mechanism is used to perform normal opening or closing operations on the contact system, the drive source controls the drive lever that rotates synchronously with it to rotate. The rotation of the drive lever can be transmitted to the connecting rod assembly through the transmission auxiliary component, so that the connecting rod assembly can also rotate, thereby driving the main shaft assembly to rotate synchronously, so that the main shaft assembly can drive the contact system to rotate, thus realizing normal opening or closing.

[0018] When the contact system is in the welded state after closing, the entire contact system is fixed. The main shaft assembly and connecting rod assembly, which are sequentially connected to it, are also immobile and fixed. When the operator drives the system via the drive source, only the drive lever can be rotated. Because the limiting structure is located on the transmission path from the drive lever and connecting rod assembly to the main shaft assembly, it limits the rotation of the drive lever, preventing it from being forcibly rotated to the open position and causing the drive source connected to it to display an open state externally. Therefore, the operator can determine whether the contact system is in the open state based on the real-time status of the drive source. This prevents incorrect judgments when the contact system is in the welded state, thus achieving the protective effect in the welded state and reducing operational risks. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments of this application will be briefly introduced below. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the overall structure of the switch operating mechanism with welding protection function according to an embodiment of this application; Figure 2 This is a schematic diagram of a switch operating mechanism with welding protection function applied to a switchgear according to an embodiment of this application; Figure 3 This is a schematic diagram of the internal structure of the switch operating mechanism with welding protection function according to an embodiment of this application; Figure 4 This is a schematic diagram showing the connection between the spindle assembly and the operating handle of the switch operating mechanism with welding protection function according to an embodiment of this application; Figure 5 This is a partial structural schematic diagram of the spindle assembly of the switch operating mechanism with welding protection function according to an embodiment of this application; Figure 6 This is a schematic diagram of the first type of switch operating mechanism with fusion welding protection function in the fusion welding state according to the embodiments of this application; Figure 7 This is a schematic diagram of the first type of switch operating mechanism with welding protection function in the open state according to the embodiments of this application; Figure 8 This is a schematic diagram of a second type of switch operating mechanism with fusion welding protection function in a fusion welding state according to an embodiment of this application; Figure 9 This is a schematic diagram of the second type of switch operating mechanism with welding protection function in the open state according to an embodiment of this application; Figure 10This is a schematic diagram of the limit position of a third type of switch operating mechanism with welding protection function in the welding state according to an embodiment of this application; Figure 11 This is a schematic diagram of a third type of switch operating mechanism with fusion welding protection function in the fusion welding state without being limited; Figure 12 This is a schematic diagram of the third type of switch operating mechanism with welding protection function in the open state according to an embodiment of this application; Figure 13 This is a schematic diagram of the limit position of the fourth type of switch operating mechanism with fusion welding protection function in the fusion welding state according to the embodiments of this application; Figure 14 This is a schematic diagram of a fourth type of switch operating mechanism with fusion welding protection function in the fusion welding state without being limited; Figure 15 This is a schematic diagram of the fourth type of switch operating mechanism with welding protection function in the open state according to an embodiment of this application; Figure 16 This is a schematic diagram of a fifth type of switch operating mechanism with fusion welding protection function in the fusion welding state according to an embodiment of this application; Figure 17 This is a schematic diagram of the fifth type of switch operating mechanism with welding protection function in the open state according to the embodiments of this application; Figure 18 for Figure 17 Sectional view at section AA; Figure 19 This is a schematic diagram of a sixth type of switch operating mechanism with fusion welding protection function in the fusion welding state according to an embodiment of this application; Figure 20 This is a schematic diagram of the sixth type of switch operating mechanism with welding protection function in the open state according to an embodiment of this application; Figure 21 for Figure 20 Sectional view of section BB.

[0021] Explanation of icon numbers: 1. Transmission assembly; 11. Drive lever; 111. Rotational connecting part; 1111. First limiting part; 1112. Second limiting part; 112. Drive connecting part; 12. Linkage assembly; 12a. Rotating connection point; 121. Upper link; 1211. Linkage limiting part; 122. Lower link; 1221. Linkage body part; 1222. Linkage extension part; 13. Spindle assembly; 131. Spindle drive component; 132. Spindle driven component; 133. Rotating shaft; 134. Connecting shaft; 135. Fixed bracket; 1351. Mounting plate; 1352. Support column; 1353. Rotating hole; 1354. Guide hole; 14. Limiting structure; 14a. First limiting surface; 14b. Second limiting surface; 141. Main spindle limiting component; 142. Auxiliary limiting component; 1421. Limiting main body; 1422. Auxiliary limiting part; 2. Transmission auxiliary components; 3. Operating handle; X, first direction; Y, second direction; Z, third direction. Detailed Implementation

[0022] The features and exemplary embodiments of various aspects of this application will be described in detail below. To make the objectives, technical solutions, and advantages of this application clearer, the application will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only intended to explain this application and not to limit it. For those skilled in the art, this application can be implemented without some of these specific details. The following description of the embodiments is merely to provide a better understanding of this application by illustrating examples.

[0023] The contact system of a switching device has an open state and a closed state. In the open state, the moving contact and the stationary contact of the contact system are separated, thereby disconnecting the circuit. In the closed state, the moving contact and the stationary contact are in contact, thereby conducting the circuit. However, in the closed state, if the current in the circuit is too high, the contact points of the moving and stationary contacts may weld together, preventing them from separating and thus preventing normal opening.

[0024] like Figures 1 to 21As shown, this application embodiment provides a switch operating mechanism with welding protection function, which includes a transmission group 1, including a drive lever 11, a connecting rod assembly 12, a main shaft assembly 13, and a limiting structure 14. The drive lever 11, the connecting rod assembly 12, and the main shaft assembly 13 are rotatably arranged and sequentially connected to the drive source and the contact system to form a transmission path from the drive lever 11, the connecting rod assembly 12 to the main shaft assembly 13. The limiting structure 14 is provided on the transmission path to limit the drive lever 11. A transmission auxiliary component 2 is elastic and telescopically connected between the drive lever 11 and the connecting rod assembly 12. When the contact system is in a welding state, the main shaft assembly 13 and the connecting rod assembly 12 connected to the contact system are both in a fixed state. The drive lever 11 is limited by the limiting structure 14 to engage with the connecting rod assembly 12 and the main shaft assembly 13.

[0025] It should be noted that the drive lever 11, the connecting rod assembly 12 and the main shaft assembly 13 are sequentially connected to form a transmission route. The limiting structure 14 is provided on the transmission route, which means that the limiting structure 14 can be provided on at least one of the drive lever 11, the connecting rod assembly 12 and the main shaft assembly 13, or on the transmission parts in the transmission process of the three, so as to achieve the stopping effect on the transmission action and the limiting effect on the drive lever 11.

[0026] In specific implementation, when the switch operating mechanism is used to perform normal opening or closing operations on the contact system, the drive source controls the drive lever 11, which rotates synchronously with it, to rotate. The rotation of the drive lever 11 can be transmitted to the connecting rod assembly 12 through the transmission auxiliary component 2, so that the connecting rod assembly 12 can also rotate, thereby driving the main shaft assembly 13 to rotate synchronously, so that the main shaft assembly 13 can drive the contact system to rotate, thus realizing normal opening or closing.

[0027] When the contact system is in the closed, welded state, the entire contact system is fixed. The main shaft assembly 13 and connecting rod assembly 12, which are sequentially connected to it, are also immobile and fixed. When the operator drives the system via the drive source, only the drive lever 11 can be rotated. Since the limiting structure 14 is located on the transmission path from the drive lever 11 and connecting rod assembly 12 to the main shaft assembly 13, it limits the rotation of the drive lever 11, preventing it from being forcibly rotated to the open position and causing the drive source connected to it to display an open state externally. Therefore, the operator can determine whether the contact system is in the open state based on the real-time status of the drive source. This prevents incorrect judgments when the contact system is in the welded state, thus achieving the protection effect in the welded state and reducing operational risks.

[0028] like Figures 1 to 5As shown in this embodiment, the transmission auxiliary component 2 is a spring structure. The spring structure is elastic. In the open and closed states, the drive lever 11 can stretch the spring structure. After the spring structure is stretched to a certain range, the drive lever 11 and the spring structure together drive the connecting rod assembly 12 to move. In the welded state, the connecting rod assembly 12 is in a fixed state, and the spring structure provides a certain rotational stroke for the drive lever 11, thereby preventing the drive lever 11 from being forcibly rotated and causing damage.

[0029] In this embodiment of the application, the driving source is the operating handle 3. The operating handle 3 and the driving lever 11 are linked by a linkage mechanism, so that the two can rotate synchronously. The operator can drive the driving lever 11 by rotating the operating handle 3. Furthermore, inside the switch operating mechanism, the driving lever 11 can also represent the real-time state of the operating handle 3.

[0030] like Figures 1 to 5 As shown in the embodiment of this application, the switch operating mechanism with welding protection function includes a drive lever 11, a connecting rod assembly 12, and a main shaft assembly 13 arranged sequentially and connected in a transmission manner along a first direction X. The main shaft assembly 13 includes a main shaft drive member 131 and a main shaft driven member 132 arranged at intervals along a second direction Y and rotated synchronously. The main shaft drive member 131 is connected in a transmission manner to the connecting rod assembly 12, and the main shaft driven member 132 is used to connect to the contact head system. The first direction X and the second direction Y are intersected.

[0031] In practice, the rotation of the drive lever 11 can drive the linkage assembly 12 to move, and the linkage assembly 12 can drive the main shaft drive 131 connected to it to rotate, so that the main shaft driven 132 and the main shaft drive 131 rotate synchronously, ultimately driving the contact system to move and complete the opening or closing operation of the contact system.

[0032] In the overall structural design, the drive lever 11, the connecting rod assembly 12, and the main shaft assembly 13 are arranged sequentially along the first direction X, achieving the effect of sequential transmission of the three in the first direction X. Furthermore, the main shaft drive component 131 and the main shaft driven component 132 of the main shaft assembly 13 are arranged at intervals along the second direction Y. When the main shaft drive component 131 and the connecting rod assembly 12 are in transmission cooperation, the rotation of the main shaft driven component 132, which is spaced apart from the connecting rod assembly 12 in the second direction Y, will not affect the movement of the connecting rod assembly 12, thereby avoiding any impact on the overall transmission movement.

[0033] like Figures 1 to 5As shown in the embodiment of this application, the switch operation mechanism with welding protection function includes a spindle assembly 13, which further includes a rotating shaft 133 and a connecting shaft 134 extending along the second direction Y. The spindle drive member 131 and the spindle driven member 132 are arranged sequentially along the second direction Y and are rotatably mounted on the outer peripheral surface of the rotating shaft 133. The connecting shaft 134 is arranged parallel to the rotating shaft 133 and connected between the spindle drive member 131 and the spindle driven member 132.

[0034] In specific implementation, both the main shaft drive 131 and the main shaft driven 132 are rotatably mounted on the outer circumferential surface of the rotating shaft 133, so that both can rotate around the rotating shaft 133 as the rotation center. This achieves coaxial rotation of the main shaft drive 131 and the main shaft driven 132, which facilitates the calculation of the driving distance and transmission distance of the drive lever 11 and the connecting rod assembly 12. This makes it easier to control the rotation angle of the main shaft driven 132, and thus reasonably control the opening and closing of the contact system.

[0035] The connecting shaft 134 is arranged parallel to the rotating shaft 133, and the connecting shaft 134 is connected between the main spindle drive 131 and the main spindle driven 132. When the main spindle drive 131 rotates, the connecting shaft 134 can drive the main spindle driven 132 to rotate around the rotating shaft 133 together, thus achieving the synchronous rotation effect of the main spindle drive 131 and the main spindle driven 132.

[0036] The switch operating mechanism with welding protection function in this application embodiment includes a spindle assembly 13 further comprising a fixed bracket 135. The fixed bracket 135 includes two mounting plates 1351 that are spaced apart and fixedly connected along the second direction Y. The connecting rod assembly 12 and the spindle drive 131 are mounted between the two mounting plates 1351. The spindle follower 132 is mounted on the side of one of the mounting plates 1351 facing away from the other mounting plate 1351.

[0037] The connecting rod assembly 12 and the spindle drive 131 are mounted between two mounting plates 1351, and perform transmission between the two mounting plates 1351. The spindle driven 132 is mounted on the side of one of the mounting plates 1351 facing away from the other mounting plate 1351. It is isolated from the connecting rod assembly 12 and the spindle drive 131 by the mounting plate 1351 on which it is located, further preventing the rotation of the spindle driven 132 from interfering with the transmission between the connecting rod assembly 12 and the spindle drive 131.

[0038] In this embodiment of the application, the fixed bracket 135 further includes a support column 1352 extending along the second direction Y. The support column 1352 is fixedly installed between the two mounting plates 1351, and its two ends are respectively fixed to the two mounting plates 1351 to achieve a fixed connection and support effect for the two mounting plates 1351.

[0039] Both mounting plates 1351 are provided with circular rotating holes 1353. The rotating shaft 133 passes through the rotating holes 1353 of the two mounting plates 1351 in sequence and is rotatably arranged within the rotating holes 1353, so that the operating handle 3, the spindle drive 131 and the spindle driven 132 can all be rotatably connected to the outer circumferential surface of the rotating shaft 133 and achieve the effect of coaxial rotation. The mounting plate 1351 where the spindle driven 132 is located has a guide hole 1354, which has an arc-shaped hole structure. The connecting shaft 134 passes through the guide hole 1354. When the spindle drive 131 rotates, the connecting shaft 134 connected to it can slide in the arc-shaped guide hole 1354, thereby driving the spindle driven 132 to rotate.

[0040] The switch operation mechanism with welding protection function in this application embodiment includes a drive lever 11 comprising a rotatable connection portion 111 and a drive connection portion 112. The rotatable connection portion 111 and the main shaft driven member 132 are rotatably disposed in the same plane perpendicular to the second direction Y. The drive connection portion 112 extends along the second direction Y and is fixedly connected to the transmission auxiliary member 2.

[0041] In specific implementation, the rotating connecting part 111 and the main shaft driven member 132 are rotatably arranged in the same plane perpendicular to the second direction Y, so that the rotating connecting part 111 is rotatably mounted on the mounting plate 1351 where the main shaft driven member 132 is located, so that the drive lever 11 as a whole has a mounting base and is arranged close to the connecting rod assembly 12 and the main shaft assembly 13, which facilitates the transmission of the action. Furthermore, one of the rotating connecting part 111 or the drive connecting part 112 is connected to the operating handle 3, so that it can rotate together with the operating handle 3.

[0042] The drive connection portion 112 extends along the second direction Y, giving the transmission auxiliary member 2 a fixed position fixedly connected to the drive connection portion 112. When the rotation connection portion 111 and the drive connection portion 112 rotate together, the transmission auxiliary member 2 rotates with the drive connection portion 112, thereby driving the linkage assembly 12 to move.

[0043] Specifically, the drive lever 11 includes two rotating connecting parts 111, which are respectively connected to the two ends of the drive connecting part 112 in the second direction Y, and are rotatably connected to the mounting plates 1351 on both sides, thereby improving the stability of the rotational connection between the drive lever 11 as a whole and the fixed bracket 135.

[0044] like Figures 6 to 9As shown in the first and second embodiments of this application, the limiting structure 14 is provided on the spindle assembly 13, and the rotating connection part 111 includes a first limiting part 1111 protruding toward the limiting structure 14. When the contact system is in the welding state, the rotating connection part 111 can rotate until its first limiting part 1111 abuts against the limiting structure 14.

[0045] In specific implementation, the first limiting part 1111 of the rotating connection part 111 protrudes towards the limiting structure 14. When the rotating connection part 111 rotates in the fusion-welded state of the contact system, the first limiting part 1111 of the rotating connection part 111 can directly abut against the limiting structure 14 of the fixed spindle assembly 13, thereby preventing the drive lever 11 from continuing to rotate and preventing the operating handle 3, which rotates synchronously with the drive lever 11, from continuing to rotate. This achieves a direct limiting effect, provides good fixation for the operating handle 3, and thus achieves a protective effect in the fusion-welded state, reducing operational risks. Furthermore, by placing the limiting structure 14 on the spindle assembly 13, only structural changes to the spindle assembly 13 are required, making the setting of the limiting structure 14 easier and reducing production difficulty.

[0046] Specifically, the limiting structure 14 is provided on the spindle follower 132 of the spindle assembly 13. Since the spindle follower 132 and the rotating connection part 111 are rotatably arranged in the same plane, the limiting structure 14 on the spindle follower 132 can directly contact and limit the connection part 111.

[0047] like Figure 6 and Figure 7 As shown, the switch operating mechanism with welding protection function in the first embodiment of this application has a limiting structure 14 provided on the main shaft follower 132 and protruding toward the rotating connection part 111. The limiting structure 14 includes a first limiting surface 14a and a second limiting surface 14b with an acute angle. When the contact system is in the welding state, the rotating connection part 111 can rotate to abut against the first limiting surface 14a.

[0048] In specific implementation, the limiting structure 14 includes a first limiting surface 14a and a second limiting surface 14b with an acute angle, that is, the limiting structure 14 is a protruding sharp-angled structure that protrudes away from the rotation center of the spindle follower 132. In the welded state of the contact system, the fixed limiting structure 14 protrudes towards the rotating connection portion 111, and the first limiting portion 1111 of the rotating connection portion 111 can rotate to abut against the first limiting surface 14a of the sharp-angled structure, thereby achieving a fixing effect. The sharp-angled structure directly connected to the spindle assembly 13 has a simple overall structure, facilitating production and positioning with the first limiting portion 1111.

[0049] In the normal tripping state, the main shaft assembly 13 will rotate to the limit structure 14 to avoid the first limit part 1111, so that it will not have a limiting effect on the drive lever 11.

[0050] like Figure 8 and Figure 9 As shown, the second embodiment of the present application has a switch operating mechanism with welding protection function. The limiting structure 14 includes a main shaft limiting member 141 and an auxiliary limiting member 142. The main shaft limiting member 141 is disposed on the main shaft driven member 132 and protrudes toward the auxiliary limiting member 142. The main shaft limiting member 141 is disposed at a distance from the rotating connection portion 111. The auxiliary limiting member 142 is rotatably disposed on one side of the rotating connection portion 111 and the main shaft driven member 132. The auxiliary limiting member 142 includes a limiting main body portion 1421 that abuts against the rotating connection portion 111 and an auxiliary limiting portion 1422 that is disposed corresponding to the main shaft driven member 132. When the contact system is in the welding state, the auxiliary limiting member 142 can rotate until its auxiliary limiting portion 1422 abuts against the main shaft limiting member 141.

[0051] In specific implementation, the main spindle limiting member 141 of the limiting structure 14 is located on the main spindle driven member 132, while the auxiliary limiting member 142 is located on the mounting plate 1351. The main spindle limiting member 141 protrudes in a direction away from the rotation center of the main spindle driven member 132. In the welded state of the contact system, both the main spindle driven member 132 and the main spindle limiting member 141 are fixed, and the main spindle limiting member 141 abuts against the auxiliary limiting part 1422, preventing the auxiliary limiting member 142 from rotating further clockwise. When the drive lever 11 rotates counterclockwise to abut against the limiting body 1421 of the auxiliary limiting member 142, the fixed auxiliary limiting member 142 limits the counterclockwise rotation of the drive lever 11, preventing the drive lever 11 from continuing to rotate and preventing the drive lever 11 and the operating handle 3 from rotating to the open state.

[0052] In the normal tripping state, the main shaft limiting member 141 of the limiting structure 14 is separated from the auxiliary limiting part 1422, and the auxiliary limiting member 142 can rotate freely, so that it will not have a limiting effect on the drive lever 11.

[0053] The second embodiment of this application has a switch operation mechanism with welding protection function, wherein the projection of the main spindle limiting member 141 in a plane perpendicular to the second direction Y is arranged in a fan ring shape, the auxiliary limiting part 1422 is recessed in the surface of the limiting main body part 1421, and the groove shape of the auxiliary limiting part 1422 is adapted to the shape of the main spindle limiting member 141.

[0054] In practice, when the fan-shaped spindle limiting member 141 rotates, its outer arc surface can slide relative to the groove-shaped auxiliary limiting part 1422, thereby adapting to the rotational action between the spindle limiting member 141 and the auxiliary limiting member 142, so that the spindle limiting member 141 and the auxiliary limiting member 142 can smoothly complete the limiting cooperation.

[0055] like Figures 10 to 15 As shown in the third and fourth embodiments of this application, the limiting structure 14 is provided on the drive lever 11, the linkage assembly 12 includes an upper linkage 121 and a lower linkage 122 that are rotatably connected, the transmission auxiliary member 2 is connected between the rotatable connection point 12a of the upper linkage 121 and the lower linkage 122 and the drive connection part 112, and the lower linkage 122 is also rotatably connected to the main shaft drive member 131. When the contact system is in the welding state, the drive lever 11 can rotate until its limiting structure 14 abuts against the upper linkage 121 or the lower linkage 122.

[0056] In specific implementation, by configuring the linkage assembly 12 as an upper linkage 121 and a lower linkage 122, a transmission auxiliary component 2 can be connected at the rotational connection point 12a between the upper linkage 121 and the lower linkage 122. Thus, when the drive lever 11 rotates, it can drive the transmission auxiliary component 2 to move. The transmission auxiliary component 2 applies force at the rotational connection point 12a, simultaneously causing the upper linkage 121 and the lower linkage 122 to rotate, thereby driving the main shaft drive component 131 to move. It should be noted that the upper linkage 121 is used to engage with the locking assembly in the switch operating mechanism to achieve the locking effect when the switch operating mechanism is open or closed.

[0057] When the contact system is in the fusion welding state, the upper connecting rod 121 and the lower connecting rod 122 of the connecting rod assembly 12 are both in a fixed state. External force can drive the drive lever 11 to rotate until its limiting structure 14 abuts against the upper connecting rod 121 or the lower connecting rod 122, thereby achieving the limiting effect on the drive lever 11.

[0058] like Figures 10 to 12 As shown, in the third embodiment of this application, a switch operating mechanism with fusion welding protection function is provided, wherein the limiting structure 14 protrudes from the rotating connection portion 111 along the second direction Y, and the upper connecting rod 121 has a connecting rod limiting portion 1211 protruding toward the limiting structure 14. When the contact system is in the fusion welding state, the drive lever 11 can rotate until its limiting structure 14 abuts against the connecting rod limiting portion 1211.

[0059] In specific implementation, the limiting structure 14 protrudes from the rotating connection part 111 along the second direction Y. When the limiting structure 14 comes into contact with the corresponding connecting rod limiting part 1211, it can prevent the driving lever 11 from continuing to rotate in a plane perpendicular to the second direction Y, thereby achieving the limiting effect on the driving lever 11.

[0060] With the contact system in a welded state, both the upper connecting rod 121 and the lower connecting rod 122 of the connecting rod assembly 12 are in a fixed state. An external force drives the drive lever 11 to rotate counterclockwise, stretching the spring-structured transmission auxiliary component 2 until the limiting structure 14 of the drive lever 11 abuts against the connecting rod limiting part 1211, thus achieving a limiting effect on the drive lever 11. When the external force is withdrawn, the drive lever 11 can return to its normal closed position due to the reset effect of the spring-structured transmission auxiliary component 2.

[0061] In the open state of the contact system, since the upper connecting rod 121 can rotate and can rotate to a position far away from the drive lever 11, the drive lever 11 can rotate freely in the closed state and the open state.

[0062] like Figures 13 to 15 As shown, in the fourth embodiment of this application, a switch operating mechanism with fusion welding protection function is provided, wherein the limiting structure 14 protrudes from the rotating connection portion 111 along the second direction Y, and the lower connecting rod 122 includes a connecting rod body portion 1221 and a connecting rod extension portion 1222 connected to each other. The two ends of the connecting rod body portion 1221 are rotatably connected to the rotating connection point 12a and the main shaft drive member 131, respectively. The connecting rod extension portion 1222 is connected to the end of the connecting rod body portion 1221 located at the rotating connection point 12a. When the contact system is in the fusion welding state, the drive lever 11 can rotate until its limiting structure 14 abuts against the connecting rod extension portion 1222.

[0063] In specific implementation, the limiting structure 14 protrudes from the rotating connection portion 111 along the second direction Y, and the connecting rod extension portion 1222 protrudes towards the driving lever 11. During the rotation of the limiting structure 14, it can abut against the connecting rod extension portion 1222. Therefore, the protruding connecting rod extension portion 1222 can prevent the driving lever 11 from continuing to rotate in a plane perpendicular to the second direction Y, thereby achieving the limiting effect on the driving lever 11.

[0064] With the contact system in a welded state, both the upper connecting rod 121 and the lower connecting rod 122 of the connecting rod assembly 12 are in a fixed state. An external force drives the drive lever 11 to rotate counterclockwise, stretching the spring-structured transmission auxiliary component 2 until the limiting structure 14 of the drive lever 11 abuts against the connecting rod extension 1222, thus limiting the drive lever 11. When the external force is withdrawn, the drive lever 11 returns to its normal closed position due to the reset effect of the spring-structured transmission auxiliary component 2.

[0065] In the open state of the contact system, since the lower connecting rod 122 can rotate and can rotate to a position far away from the drive lever 11, the drive lever 11 can rotate freely in the closed state and the open state.

[0066] like Figures 16 to 21 As shown in the fifth and sixth embodiments of this application, the limiting structure 14 is provided on the linkage assembly 12. The limiting structure 14 extends along the second direction Y. The driving lever 11 includes two rotating connecting parts 111 arranged parallel to each other along the second direction Y. When the contact system is in the fusion welding state, both rotating connecting parts 111 can rotate to abut against the limiting structure 14 of the linkage assembly 12.

[0067] In specific implementation, the drive lever 11 includes two rotating connecting parts 111 arranged parallel to each other along the second direction Y. When the contact system is in the fusion welding state, the two rotating connecting parts 111 can rotate on both sides to abut against the limiting structure 14 of the connecting rod assembly 12, so that the limiting structure 14 has two limiting points in the second direction Y for limiting the drive lever 11, thereby improving the stability of the limiting fixation.

[0068] like Figures 16 to 18 As shown, the switch operating mechanism with welding protection function in the fifth embodiment of this application includes a linkage assembly 12 comprising two limiting structures 14 extending in the opposite direction along the second direction Y. The two limiting structures 14 are correspondingly arranged with two rotating connecting parts 111, and each rotating connecting part 111 has a second limiting part 1112 arranged opposite to the position of the corresponding limiting structure 14.

[0069] Specifically, the second limiting part 1112 protrudes along the second direction Y and is disposed opposite to each other, so as to correspond to the two limiting structures 14 extending in opposite directions along the second direction Y, thereby achieving the effect of corresponding abutment.

[0070] In specific implementation, when the contact system is in a fusion welding state, the upper connecting rod 121 of the connecting rod assembly 12 is in a fixed state. The external force drives the driving lever 11 to rotate counterclockwise until its two second limiting parts 1112 abut against the two limiting structures 14, thereby achieving the limiting effect on the driving lever 11.

[0071] In the open state of the contact system, since the upper connecting rod 121 can rotate and can rotate to a position far away from the drive lever 11, the drive lever 11 can rotate freely in the closed state and the open state.

[0072] like Figures 19 to 21As shown, in the sixth embodiment of this application, a switch operating mechanism with welding protection function is provided, wherein the limiting structure 14 is axial and extends along the second direction Y, and the extension length of the limiting structure 14 covers the interval between the two rotating connecting parts 111.

[0073] In specific implementation, with the contact system in a welded state, the upper connecting rod 121 of the connecting rod assembly 12 is in a fixed state. An external force drives the drive lever 11 to rotate counterclockwise until it abuts against the limiting structure 14 of the shaft-like structure, thereby achieving a limiting effect on the drive lever 11. Since the extension length of the limiting structure 14 covers the interval between the two rotating connecting parts 111, it can ensure that the two rotating connecting parts 111 of the drive lever 11 can stably abut against the limiting structure 14 of the shaft-like structure, thus ensuring the limiting stability in the welded state.

[0074] In the open state of the contact system, since the upper connecting rod 121 can rotate and can rotate to a position far away from the drive lever 11, the drive lever 11 can rotate freely in the closed state and the open state.

[0075] On the other hand, this application embodiment also provides a switching device, which includes the above-mentioned switch operating mechanism with welding protection function. The switching device also includes a contact system, which is connected to the main shaft assembly 13 of the switch operating mechanism.

[0076] In specific implementation, when the switch operating mechanism is used to perform normal opening or closing operations on the contact system, the drive source controls the drive lever 11, which rotates synchronously with it, to rotate. The rotation of the drive lever 11 can be transmitted to the connecting rod assembly 12 through the transmission auxiliary component 2, so that the connecting rod assembly 12 can also rotate, thereby driving the main shaft assembly 13 to rotate synchronously, so that the main shaft assembly 13 can drive the contact system to rotate, thus realizing normal opening or closing.

[0077] When the contact system is in the closed, welded state, the entire contact system is fixed. The main shaft assembly 13 and connecting rod assembly 12, which are sequentially connected to it, are also immobile and fixed. When the operator drives the system via the drive source, only the drive lever 11 can be rotated. Since the limiting structure 14 is located on the transmission path from the drive lever 11 and connecting rod assembly 12 to the main shaft assembly 13, it limits the rotation of the drive lever 11, preventing it from being forcibly rotated to the open position and causing the drive source connected to it to display an open state externally. Therefore, the operator can determine whether the contact system is in the open state based on the real-time status of the drive source. This prevents incorrect judgments when the contact system is in the welded state, thus achieving the protection effect in the welded state and reducing operational risks.

[0078] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising..." does not exclude the presence of additional identical elements in the process, method, article, or apparatus that includes said element.

[0079] The above description is merely a specific implementation of this application. Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working processes of the systems, modules, and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here. It should be understood that the protection scope of this application is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this application, and these modifications or substitutions should all be covered within the protection scope of this application.

Claims

1. A switch operating mechanism with fusion welding protection function, characterized in that, include: The transmission assembly (1) includes a drive lever (11), a connecting rod assembly (12), a spindle assembly (13), and a limiting structure (14). The drive lever (11), the connecting rod assembly (12), and the spindle assembly (13) are rotatably arranged and sequentially connected to the drive source and the contact system to form a transmission route from the drive lever (11), the connecting rod assembly (12), to the spindle assembly (13). The limiting structure (14) is provided on the transmission route to limit the drive lever (11). The transmission auxiliary component (2) is elastic and is telescopically connected between the drive lever (11) and the connecting rod assembly (12). When the contact system is in a fusion welding state, the main shaft assembly (13) and the connecting rod assembly (12) connected to the contact system are both in a fixed state, and the driving lever (11) is limited to the connecting rod assembly (12) and the main shaft assembly (13) through the limiting structure (14).

2. The switch operating mechanism with welding protection function according to claim 1, characterized in that, The drive lever (11), the connecting rod assembly (12), and the main shaft assembly (13) are arranged sequentially and connected in a transmission along a first direction (X). The main shaft assembly (13) includes a main shaft drive member (131) and a main shaft driven member (132) arranged at intervals along a second direction (Y) and rotating synchronously. The main shaft drive member (131) is connected in a transmission with the connecting rod assembly (12), and the main shaft driven member (132) is used to connect the contact system. The first direction (X) and the second direction (Y) are intersecting.

3. The switch operating mechanism with welding protection function according to claim 2, characterized in that, The spindle assembly (13) further includes a rotating shaft (133) and a connecting shaft (134) extending along the second direction (Y). The spindle drive (131) and the spindle driven (132) are arranged sequentially along the second direction (Y) and are rotatably mounted on the outer circumferential surface of the rotating shaft (133). The connecting shaft (134) is arranged parallel to the rotating shaft (133) and connected between the spindle drive (131) and the spindle driven (132).

4. The switch operating mechanism with welding protection function according to claim 3, characterized in that, The spindle assembly (13) further includes a fixed bracket (135), which includes two mounting plates (1351) spaced apart and fixedly connected along a second direction (Y). The connecting rod assembly (12) and the spindle drive (131) are mounted between the two mounting plates (1351), and the spindle follower (132) is mounted on the side of one of the mounting plates (1351) facing away from the other mounting plate (1351).

5. The switch operating mechanism with welding protection function according to any one of claims 2 to 4, characterized in that, The drive lever (11) includes a rotating connection part (111) and a drive connection part (112). The rotating connection part (111) and the main shaft follower (132) are rotatably arranged in the same plane perpendicular to the second direction (Y). The drive connection part (112) extends along the second direction (Y) and is fixedly connected to the transmission auxiliary member (2).

6. The switch operating mechanism with welding protection function according to claim 5, characterized in that, The limiting structure (14) is provided on the spindle follower (132) of the spindle assembly (13) and protrudes toward the rotating connection part (111). The rotating connection part (111) includes a first limiting part (1111) protruding toward the limiting structure (14). The limiting structure (14) includes a first limiting surface (14a) and a second limiting surface (14b) with an acute angle. When the contact system is in the welding state, the rotating connection part (111) can rotate until its first limiting part (1111) abuts against the first limiting surface (14a).

7. The switch operating mechanism with welding protection function according to claim 5, characterized in that, The limiting structure (14) includes a main spindle limiting member (141) and an auxiliary limiting member (142). The main spindle limiting member (141) is disposed on the main spindle driven member (132) of the main spindle assembly (13) and protrudes toward the auxiliary limiting member (142). The main spindle limiting member (141) is disposed at a distance from the rotating connection part (111). The auxiliary limiting member (142) is rotatably disposed on one side of the rotating connection part (111) and the main spindle driven member (132). The auxiliary limiting member (142) includes a limiting body part (142) that abuts against the rotating connection part (111). 1) An auxiliary limiting part (1422) is provided corresponding to the main spindle follower (132). The projection of the main spindle limiting member (141) in a plane perpendicular to the second direction (Y) is arranged in a fan-shaped manner. The auxiliary limiting part (1422) is recessed into the surface of the limiting main body (1421), and the groove shape of the auxiliary limiting part (1422) is adapted to the shape of the main spindle limiting member (141). When the contact system is in the welding state, the auxiliary limiting member (1422) can rotate until its auxiliary limiting part (1422) abuts against the main spindle limiting member (141).

8. The switch operating mechanism with welding protection function according to claim 5, characterized in that, The limiting structure (14) is provided on the driving lever (11). The connecting rod assembly (12) includes an upper connecting rod (121) and a lower connecting rod (122) that are rotatably connected. The transmission auxiliary member (2) is connected between the rotatable connection point (12a) of the upper connecting rod (121) and the lower connecting rod (122) and the driving connection part (112). The lower connecting rod (122) is also rotatably connected to the main shaft driving member (131). When the contact system is in the welding state, the driving lever (11) can rotate until its limiting structure (14) abuts against the upper connecting rod (121) or the lower connecting rod (122).

9. The switch operating mechanism with welding protection function according to claim 8, characterized in that, The limiting structure (14) protrudes from the rotating connection (111) along the second direction (Y), and the upper connecting rod (121) has a connecting rod limiting part (1211) protruding toward the limiting structure (14). When the contact system is in the welding state, the driving lever (11) can rotate until its limiting structure (14) abuts against the connecting rod limiting part (1211). Alternatively, the limiting structure (14) protrudes from the rotating connection portion (111) along the second direction (Y). The lower connecting rod (122) includes a connecting rod body portion (1221) and a connecting rod extension portion (1222) connected together. The two ends of the connecting rod body portion (1221) are rotatably connected to the rotating connection point (12a) and the main shaft drive member (131), respectively. The connecting rod extension portion (1222) is connected to the end of the connecting rod body portion (1221) located at the rotating connection point (12a). When the contact system is in the fusion welding state, the driving lever (11) can rotate until its limiting structure (14) abuts against the connecting rod extension portion (1222).

10. The switch operating mechanism with fusion welding protection function according to claim 5, characterized in that, The limiting structure (14) is provided on the link assembly (12). The limiting structure (14) extends along the second direction (Y). The drive lever (11) includes two rotating connecting parts (111) arranged parallel to each other along the second direction (Y). When the contact system is in the welding state, both rotating connecting parts (111) can rotate to abut against the limiting structure (14) of the link assembly (12).

11. The switch operating mechanism with welding protection function according to claim 10, characterized in that, The linkage assembly (12) includes two limiting structures (14) extending in the opposite direction along the second direction (Y). The two limiting structures (14) are respectively provided with the two rotating connecting parts (111), and each of the rotating connecting parts (111) has a second limiting part (1112) that is positioned opposite to the corresponding limiting structure (14). Alternatively, the limiting structure (14) is an axial structure and extends along the second direction (Y), and the extension length of the limiting structure (14) covers the interval between the two rotating connecting parts (111).

12. A switching device, characterized in that, The switch operating mechanism includes a welding protection function as described in any one of claims 1 to 11, and the switch electrical appliance further includes a contact system that is connected in drive to the main shaft assembly (13) of the switch operating mechanism.

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